Commit | Line | Data |
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a2889657 | 1 | /* Display generation from window structure and buffer text. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, |
3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, | |
4 | 2004, 2005 Free Software Foundation, Inc. | |
a2889657 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 10 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
a2889657 | 22 | |
5f5c8ee5 GM |
23 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
24 | ||
25 | Redisplay. | |
26 | ||
27 | Emacs separates the task of updating the display from code | |
28 | modifying global state, e.g. buffer text. This way functions | |
29 | operating on buffers don't also have to be concerned with updating | |
30 | the display. | |
31 | ||
32 | Updating the display is triggered by the Lisp interpreter when it | |
33 | decides it's time to do it. This is done either automatically for | |
34 | you as part of the interpreter's command loop or as the result of | |
35 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
36 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
48400103 | 37 | let's say almost---see the description of direct update |
4b41cebb | 38 | operations, below.) |
5f5c8ee5 GM |
39 | |
40 | The following diagram shows how redisplay code is invoked. As you | |
41 | can see, Lisp calls redisplay and vice versa. Under window systems | |
42 | like X, some portions of the redisplay code are also called | |
43 | asynchronously during mouse movement or expose events. It is very | |
44 | important that these code parts do NOT use the C library (malloc, | |
45 | free) because many C libraries under Unix are not reentrant. They | |
46 | may also NOT call functions of the Lisp interpreter which could | |
47 | change the interpreter's state. If you don't follow these rules, | |
48 | you will encounter bugs which are very hard to explain. | |
49 | ||
50 | (Direct functions, see below) | |
2311178e | 51 | direct_output_for_insert, |
5f5c8ee5 GM |
52 | direct_forward_char (dispnew.c) |
53 | +---------------------------------+ | |
54 | | | | |
55 | | V | |
82a7ab23 | 56 | +--------------+ redisplay +----------------+ |
5f5c8ee5 GM |
57 | | Lisp machine |---------------->| Redisplay code |<--+ |
58 | +--------------+ (xdisp.c) +----------------+ | | |
59 | ^ | | | |
60 | +----------------------------------+ | | |
61 | Don't use this path when called | | |
62 | asynchronously! | | |
63 | | | |
64 | expose_window (asynchronous) | | |
65 | | | |
66 | X expose events -----+ | |
67 | ||
959bc044 | 68 | What does redisplay do? Obviously, it has to figure out somehow what |
5f5c8ee5 GM |
69 | has been changed since the last time the display has been updated, |
70 | and to make these changes visible. Preferably it would do that in | |
71 | a moderately intelligent way, i.e. fast. | |
72 | ||
73 | Changes in buffer text can be deduced from window and buffer | |
74 | structures, and from some global variables like `beg_unchanged' and | |
75 | `end_unchanged'. The contents of the display are additionally | |
76 | recorded in a `glyph matrix', a two-dimensional matrix of glyph | |
77 | structures. Each row in such a matrix corresponds to a line on the | |
78 | display, and each glyph in a row corresponds to a column displaying | |
79 | a character, an image, or what else. This matrix is called the | |
80 | `current glyph matrix' or `current matrix' in redisplay | |
81 | terminology. | |
82 | ||
83 | For buffer parts that have been changed since the last update, a | |
84 | second glyph matrix is constructed, the so called `desired glyph | |
85 | matrix' or short `desired matrix'. Current and desired matrix are | |
86 | then compared to find a cheap way to update the display, e.g. by | |
87 | reusing part of the display by scrolling lines. | |
88 | ||
89 | ||
90 | Direct operations. | |
91 | ||
48400103 | 92 | You will find a lot of redisplay optimizations when you start |
5f5c8ee5 GM |
93 | looking at the innards of redisplay. The overall goal of all these |
94 | optimizations is to make redisplay fast because it is done | |
95 | frequently. | |
96 | ||
97 | Two optimizations are not found in xdisp.c. These are the direct | |
98 | operations mentioned above. As the name suggests they follow a | |
99 | different principle than the rest of redisplay. Instead of | |
100 | building a desired matrix and then comparing it with the current | |
101 | display, they perform their actions directly on the display and on | |
102 | the current matrix. | |
103 | ||
104 | One direct operation updates the display after one character has | |
105 | been entered. The other one moves the cursor by one position | |
106 | forward or backward. You find these functions under the names | |
107 | `direct_output_for_insert' and `direct_output_forward_char' in | |
108 | dispnew.c. | |
109 | ||
2311178e | 110 | |
5f5c8ee5 GM |
111 | Desired matrices. |
112 | ||
113 | Desired matrices are always built per Emacs window. The function | |
114 | `display_line' is the central function to look at if you are | |
115 | interested. It constructs one row in a desired matrix given an | |
116 | iterator structure containing both a buffer position and a | |
117 | description of the environment in which the text is to be | |
118 | displayed. But this is too early, read on. | |
119 | ||
120 | Characters and pixmaps displayed for a range of buffer text depend | |
121 | on various settings of buffers and windows, on overlays and text | |
122 | properties, on display tables, on selective display. The good news | |
123 | is that all this hairy stuff is hidden behind a small set of | |
959bc044 | 124 | interface functions taking an iterator structure (struct it) |
5f5c8ee5 GM |
125 | argument. |
126 | ||
48400103 | 127 | Iteration over things to be displayed is then simple. It is |
1178ddde GM |
128 | started by initializing an iterator with a call to init_iterator. |
129 | Calls to get_next_display_element fill the iterator structure with | |
130 | relevant information about the next thing to display. Calls to | |
5f5c8ee5 GM |
131 | set_iterator_to_next move the iterator to the next thing. |
132 | ||
133 | Besides this, an iterator also contains information about the | |
134 | display environment in which glyphs for display elements are to be | |
135 | produced. It has fields for the width and height of the display, | |
136 | the information whether long lines are truncated or continued, a | |
137 | current X and Y position, and lots of other stuff you can better | |
138 | see in dispextern.h. | |
139 | ||
140 | Glyphs in a desired matrix are normally constructed in a loop | |
141 | calling get_next_display_element and then produce_glyphs. The call | |
142 | to produce_glyphs will fill the iterator structure with pixel | |
143 | information about the element being displayed and at the same time | |
144 | produce glyphs for it. If the display element fits on the line | |
145 | being displayed, set_iterator_to_next is called next, otherwise the | |
146 | glyphs produced are discarded. | |
147 | ||
148 | ||
149 | Frame matrices. | |
150 | ||
151 | That just couldn't be all, could it? What about terminal types not | |
152 | supporting operations on sub-windows of the screen? To update the | |
153 | display on such a terminal, window-based glyph matrices are not | |
154 | well suited. To be able to reuse part of the display (scrolling | |
155 | lines up and down), we must instead have a view of the whole | |
156 | screen. This is what `frame matrices' are for. They are a trick. | |
157 | ||
158 | Frames on terminals like above have a glyph pool. Windows on such | |
159 | a frame sub-allocate their glyph memory from their frame's glyph | |
160 | pool. The frame itself is given its own glyph matrices. By | |
161 | coincidence---or maybe something else---rows in window glyph | |
162 | matrices are slices of corresponding rows in frame matrices. Thus | |
163 | writing to window matrices implicitly updates a frame matrix which | |
164 | provides us with the view of the whole screen that we originally | |
165 | wanted to have without having to move many bytes around. To be | |
166 | honest, there is a little bit more done, but not much more. If you | |
167 | plan to extend that code, take a look at dispnew.c. The function | |
168 | build_frame_matrix is a good starting point. */ | |
a2889657 | 169 | |
18160b98 | 170 | #include <config.h> |
a2889657 | 171 | #include <stdio.h> |
7ee72033 | 172 | |
a2889657 | 173 | #include "lisp.h" |
546a4f00 | 174 | #include "keyboard.h" |
44fa5b1e | 175 | #include "frame.h" |
a2889657 JB |
176 | #include "window.h" |
177 | #include "termchar.h" | |
178 | #include "dispextern.h" | |
179 | #include "buffer.h" | |
1c9241f5 | 180 | #include "charset.h" |
a2889657 JB |
181 | #include "indent.h" |
182 | #include "commands.h" | |
fa3c6b4d | 183 | #include "keymap.h" |
a2889657 JB |
184 | #include "macros.h" |
185 | #include "disptab.h" | |
30c566e4 | 186 | #include "termhooks.h" |
b0a0fbda | 187 | #include "intervals.h" |
1c9241f5 KH |
188 | #include "coding.h" |
189 | #include "process.h" | |
dfcf069d | 190 | #include "region-cache.h" |
0ef75e87 | 191 | #include "fontset.h" |
f9b3d256 | 192 | #include "blockinput.h" |
dfcf069d | 193 | |
6d55d620 | 194 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
195 | #include "xterm.h" |
196 | #endif | |
a75dfea0 AI |
197 | #ifdef WINDOWSNT |
198 | #include "w32term.h" | |
199 | #endif | |
e0f712ba | 200 | #ifdef MAC_OS |
1a578e9b AC |
201 | #include "macterm.h" |
202 | #endif | |
a2889657 | 203 | |
1dabd0cf KS |
204 | #ifndef FRAME_X_OUTPUT |
205 | #define FRAME_X_OUTPUT(f) ((f)->output_data.x) | |
206 | #endif | |
207 | ||
5f5c8ee5 GM |
208 | #define INFINITY 10000000 |
209 | ||
488dd4c4 JD |
210 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
211 | || defined (USE_GTK) | |
2e621225 | 212 | extern void set_frame_menubar P_ ((struct frame *f, int, int)); |
cd6dfed6 | 213 | extern int pending_menu_activation; |
76412d64 RS |
214 | #endif |
215 | ||
a2889657 JB |
216 | extern int interrupt_input; |
217 | extern int command_loop_level; | |
218 | ||
562020fe KS |
219 | extern Lisp_Object do_mouse_tracking; |
220 | ||
b6436d4e | 221 | extern int minibuffer_auto_raise; |
b2b5455d | 222 | extern Lisp_Object Vminibuffer_list; |
b6436d4e | 223 | |
c4628384 | 224 | extern Lisp_Object Qface; |
fec8f23e | 225 | extern Lisp_Object Qmode_line, Qmode_line_inactive, Qheader_line; |
c4628384 | 226 | |
399164b4 KH |
227 | extern Lisp_Object Voverriding_local_map; |
228 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 229 | extern Lisp_Object Qmenu_item; |
0b063c27 | 230 | extern Lisp_Object Qwhen; |
fa3c6b4d | 231 | extern Lisp_Object Qhelp_echo; |
399164b4 | 232 | |
d46fb96a | 233 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 234 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e2b64074 | 235 | Lisp_Object Qredisplay_end_trigger_functions, Vredisplay_end_trigger_functions; |
2e54982e | 236 | Lisp_Object Qinhibit_point_motion_hooks; |
0b063c27 | 237 | Lisp_Object QCeval, QCfile, QCdata, QCpropertize; |
5f5c8ee5 | 238 | Lisp_Object Qfontified; |
6422c1d7 | 239 | Lisp_Object Qgrow_only; |
869fb12c | 240 | Lisp_Object Qinhibit_eval_during_redisplay; |
b384d6f8 | 241 | Lisp_Object Qbuffer_position, Qposition, Qobject; |
5f5c8ee5 | 242 | |
cfe03a41 KS |
243 | /* Cursor shapes */ |
244 | Lisp_Object Qbar, Qhbar, Qbox, Qhollow; | |
245 | ||
493fdc3c KS |
246 | /* Pointer shapes */ |
247 | Lisp_Object Qarrow, Qhand, Qtext; | |
248 | ||
c53a1624 RS |
249 | Lisp_Object Qrisky_local_variable; |
250 | ||
7033d6df RS |
251 | /* Holds the list (error). */ |
252 | Lisp_Object list_of_error; | |
253 | ||
5f5c8ee5 GM |
254 | /* Functions called to fontify regions of text. */ |
255 | ||
256 | Lisp_Object Vfontification_functions; | |
257 | Lisp_Object Qfontification_functions; | |
258 | ||
fa3c6b4d KS |
259 | /* Non-zero means automatically select any window when the mouse |
260 | cursor moves into it. */ | |
261 | int mouse_autoselect_window; | |
262 | ||
e037b9ec | 263 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
264 | over them. */ |
265 | ||
e037b9ec | 266 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 267 | |
8232c913 KS |
268 | /* Non-zero means to reposition window if cursor line is only partially visible. */ |
269 | ||
270 | int make_cursor_line_fully_visible_p; | |
271 | ||
e037b9ec | 272 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 273 | |
35a41507 | 274 | Lisp_Object Vtool_bar_button_margin; |
5f5c8ee5 | 275 | |
e037b9ec | 276 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 277 | |
31ade731 | 278 | EMACS_INT tool_bar_button_relief; |
5f5c8ee5 | 279 | |
e037b9ec | 280 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
281 | items are visible, and no blank lines remain. */ |
282 | ||
e037b9ec | 283 | int auto_resize_tool_bars_p; |
399164b4 | 284 | |
fa3c6b4d KS |
285 | /* Non-zero means draw block and hollow cursor as wide as the glyph |
286 | under it. For example, if a block cursor is over a tab, it will be | |
287 | drawn as wide as that tab on the display. */ | |
288 | ||
289 | int x_stretch_cursor_p; | |
290 | ||
735c094c KH |
291 | /* Non-nil means don't actually do any redisplay. */ |
292 | ||
293 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
294 | ||
30a3f61c GM |
295 | /* Non-zero means Lisp evaluation during redisplay is inhibited. */ |
296 | ||
869fb12c | 297 | int inhibit_eval_during_redisplay; |
30a3f61c | 298 | |
5f5c8ee5 GM |
299 | /* Names of text properties relevant for redisplay. */ |
300 | ||
493fdc3c | 301 | Lisp_Object Qdisplay; |
4b41cebb | 302 | extern Lisp_Object Qface, Qinvisible, Qwidth; |
5f5c8ee5 GM |
303 | |
304 | /* Symbols used in text property values. */ | |
305 | ||
f65536fa | 306 | Lisp_Object Vdisplay_pixels_per_inch; |
5f5c8ee5 | 307 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; |
a7e27ef7 | 308 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
e893970b | 309 | Lisp_Object Qslice; |
da06e4d7 | 310 | Lisp_Object Qcenter; |
493fdc3c | 311 | Lisp_Object Qmargin, Qpointer; |
99c71e51 | 312 | Lisp_Object Qline_height; |
a7e27ef7 | 313 | extern Lisp_Object Qheight; |
133c764e | 314 | extern Lisp_Object QCwidth, QCheight, QCascent; |
f65536fa | 315 | extern Lisp_Object Qscroll_bar; |
cc2734ee | 316 | extern Lisp_Object Qcursor; |
5f5c8ee5 | 317 | |
8f897821 | 318 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 319 | |
8f897821 | 320 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 | 321 | |
fe1c2006 KS |
322 | /* Non-nil means escape non-break space and hyphens. */ |
323 | ||
9c69e6e1 | 324 | Lisp_Object Vnobreak_char_display; |
fe1c2006 | 325 | |
7af0e8d7 | 326 | #ifdef HAVE_WINDOW_SYSTEM |
6d925726 | 327 | extern Lisp_Object Voverflow_newline_into_fringe; |
88e6b646 KS |
328 | |
329 | /* Test if overflow newline into fringe. Called with iterator IT | |
be21b925 | 330 | at or past right window margin, and with IT->current_x set. */ |
88e6b646 KS |
331 | |
332 | #define IT_OVERFLOW_NEWLINE_INTO_FRINGE(it) \ | |
333 | (!NILP (Voverflow_newline_into_fringe) \ | |
334 | && FRAME_WINDOW_P (it->f) \ | |
335 | && WINDOW_RIGHT_FRINGE_WIDTH (it->w) > 0 \ | |
336 | && it->current_x == it->last_visible_x) | |
337 | ||
6d925726 KS |
338 | #endif /* HAVE_WINDOW_SYSTEM */ |
339 | ||
f65536fa KS |
340 | /* Non-nil means show the text cursor in void text areas |
341 | i.e. in blank areas after eol and eob. This used to be | |
342 | the default in 21.3. */ | |
343 | ||
493fdc3c | 344 | Lisp_Object Vvoid_text_area_pointer; |
f65536fa | 345 | |
5f5c8ee5 GM |
346 | /* Name of the face used to highlight trailing whitespace. */ |
347 | ||
348 | Lisp_Object Qtrailing_whitespace; | |
349 | ||
30374745 RS |
350 | /* Name and number of the face used to highlight escape glyphs. */ |
351 | ||
352 | Lisp_Object Qescape_glyph; | |
30374745 | 353 | |
44e582b8 JL |
354 | /* Name and number of the face used to highlight non-breaking spaces. */ |
355 | ||
9c69e6e1 | 356 | Lisp_Object Qnobreak_space; |
44e582b8 | 357 | |
5f5c8ee5 GM |
358 | /* The symbol `image' which is the car of the lists used to represent |
359 | images in Lisp. */ | |
360 | ||
361 | Lisp_Object Qimage; | |
362 | ||
493fdc3c KS |
363 | /* The image map types. */ |
364 | Lisp_Object QCmap, QCpointer; | |
365 | Lisp_Object Qrect, Qcircle, Qpoly; | |
366 | ||
5f5c8ee5 GM |
367 | /* Non-zero means print newline to stdout before next mini-buffer |
368 | message. */ | |
a2889657 JB |
369 | |
370 | int noninteractive_need_newline; | |
371 | ||
5f5c8ee5 | 372 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 373 | |
3c6595e0 | 374 | static int message_log_need_newline; |
f88eb0b6 | 375 | |
b14bc55e RS |
376 | /* Three markers that message_dolog uses. |
377 | It could allocate them itself, but that causes trouble | |
378 | in handling memory-full errors. */ | |
379 | static Lisp_Object message_dolog_marker1; | |
380 | static Lisp_Object message_dolog_marker2; | |
381 | static Lisp_Object message_dolog_marker3; | |
5f5c8ee5 GM |
382 | \f |
383 | /* The buffer position of the first character appearing entirely or | |
384 | partially on the line of the selected window which contains the | |
385 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
386 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 387 | |
5f5c8ee5 | 388 | static struct text_pos this_line_start_pos; |
a2889657 | 389 | |
5f5c8ee5 GM |
390 | /* Number of characters past the end of the line above, including the |
391 | terminating newline. */ | |
392 | ||
393 | static struct text_pos this_line_end_pos; | |
394 | ||
395 | /* The vertical positions and the height of this line. */ | |
a2889657 | 396 | |
a2889657 | 397 | static int this_line_vpos; |
5f5c8ee5 GM |
398 | static int this_line_y; |
399 | static int this_line_pixel_height; | |
400 | ||
401 | /* X position at which this display line starts. Usually zero; | |
402 | negative if first character is partially visible. */ | |
403 | ||
404 | static int this_line_start_x; | |
a2889657 | 405 | |
5f5c8ee5 | 406 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 407 | |
a2889657 JB |
408 | static struct buffer *this_line_buffer; |
409 | ||
5f5c8ee5 GM |
410 | /* Nonzero means truncate lines in all windows less wide than the |
411 | frame. */ | |
a2889657 | 412 | |
a2889657 JB |
413 | int truncate_partial_width_windows; |
414 | ||
7bbe686f | 415 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 416 | |
7bbe686f | 417 | int unibyte_display_via_language_environment; |
2311178e | 418 | |
5f5c8ee5 GM |
419 | /* Nonzero means we have more than one non-mini-buffer-only frame. |
420 | Not guaranteed to be accurate except while parsing | |
421 | frame-title-format. */ | |
7bbe686f | 422 | |
d39b6696 KH |
423 | int multiple_frames; |
424 | ||
a2889657 JB |
425 | Lisp_Object Vglobal_mode_string; |
426 | ||
351b5434 KS |
427 | |
428 | /* List of variables (symbols) which hold markers for overlay arrows. | |
429 | The symbols on this list are examined during redisplay to determine | |
be21b925 | 430 | where to display overlay arrows. */ |
351b5434 KS |
431 | |
432 | Lisp_Object Voverlay_arrow_variable_list; | |
433 | ||
a2889657 | 434 | /* Marker for where to display an arrow on top of the buffer text. */ |
5f5c8ee5 | 435 | |
a2889657 JB |
436 | Lisp_Object Voverlay_arrow_position; |
437 | ||
5f5c8ee5 GM |
438 | /* String to display for the arrow. Only used on terminal frames. */ |
439 | ||
a2889657 JB |
440 | Lisp_Object Voverlay_arrow_string; |
441 | ||
351b5434 KS |
442 | /* Values of those variables at last redisplay are stored as |
443 | properties on `overlay-arrow-position' symbol. However, if | |
444 | Voverlay_arrow_position is a marker, last-arrow-position is its | |
5f5c8ee5 GM |
445 | numerical position. */ |
446 | ||
351b5434 KS |
447 | Lisp_Object Qlast_arrow_position, Qlast_arrow_string; |
448 | ||
449 | /* Alternative overlay-arrow-string and overlay-arrow-bitmap | |
450 | properties on a symbol in overlay-arrow-variable-list. */ | |
451 | ||
452 | Lisp_Object Qoverlay_arrow_string, Qoverlay_arrow_bitmap; | |
d45de95b | 453 | |
5f5c8ee5 GM |
454 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
455 | ||
d39b6696 KH |
456 | Lisp_Object Vframe_title_format; |
457 | ||
5f5c8ee5 GM |
458 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
459 | ||
d39b6696 KH |
460 | Lisp_Object Vicon_title_format; |
461 | ||
08b610e4 RS |
462 | /* List of functions to call when a window's size changes. These |
463 | functions get one arg, a frame on which one or more windows' sizes | |
464 | have changed. */ | |
5f5c8ee5 | 465 | |
08b610e4 RS |
466 | static Lisp_Object Vwindow_size_change_functions; |
467 | ||
0bca8940 | 468 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 469 | |
39df553f | 470 | /* Nonzero if an overlay arrow has been displayed in this window. */ |
a2889657 | 471 | |
5f5c8ee5 | 472 | static int overlay_arrow_seen; |
ca26e1c8 | 473 | |
fba9ce76 | 474 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 475 | |
5f5c8ee5 GM |
476 | int highlight_nonselected_windows; |
477 | ||
478 | /* If cursor motion alone moves point off frame, try scrolling this | |
479 | many lines up or down if that will bring it back. */ | |
480 | ||
31ade731 | 481 | static EMACS_INT scroll_step; |
a2889657 | 482 | |
4b41cebb | 483 | /* Nonzero means scroll just far enough to bring point back on the |
5f5c8ee5 GM |
484 | screen, when appropriate. */ |
485 | ||
31ade731 | 486 | static EMACS_INT scroll_conservatively; |
0789adb2 | 487 | |
5f5c8ee5 GM |
488 | /* Recenter the window whenever point gets within this many lines of |
489 | the top or bottom of the window. This value is translated into a | |
da8b7f4f KS |
490 | pixel value by multiplying it with FRAME_LINE_HEIGHT, which means |
491 | that there is really a fixed pixel height scroll margin. */ | |
5f5c8ee5 | 492 | |
31ade731 | 493 | EMACS_INT scroll_margin; |
9afd2168 | 494 | |
5f5c8ee5 GM |
495 | /* Number of windows showing the buffer of the selected window (or |
496 | another buffer with the same base buffer). keyboard.c refers to | |
497 | this. */ | |
a2889657 | 498 | |
a2889657 JB |
499 | int buffer_shared; |
500 | ||
5f5c8ee5 | 501 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 502 | |
5f5c8ee5 | 503 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 504 | |
1862a24e MB |
505 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
506 | (this slightly odd definition is for compatibility with previous versions | |
507 | of emacs), non-zero means display them using their respective faces. | |
508 | ||
509 | This variable is deprecated. */ | |
a2889657 | 510 | |
a2889657 JB |
511 | int mode_line_inverse_video; |
512 | ||
5f5c8ee5 GM |
513 | /* Prompt to display in front of the mini-buffer contents. */ |
514 | ||
8c5b6a0a | 515 | Lisp_Object minibuf_prompt; |
a2889657 | 516 | |
5f5c8ee5 GM |
517 | /* Width of current mini-buffer prompt. Only set after display_line |
518 | of the line that contains the prompt. */ | |
519 | ||
a2889657 | 520 | int minibuf_prompt_width; |
5f5c8ee5 | 521 | |
5f5c8ee5 GM |
522 | /* This is the window where the echo area message was displayed. It |
523 | is always a mini-buffer window, but it may not be the same window | |
524 | currently active as a mini-buffer. */ | |
525 | ||
73af359d RS |
526 | Lisp_Object echo_area_window; |
527 | ||
c6e89d6c GM |
528 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
529 | pushes the current message and the value of | |
530 | message_enable_multibyte on the stack, the function restore_message | |
531 | pops the stack and displays MESSAGE again. */ | |
532 | ||
533 | Lisp_Object Vmessage_stack; | |
534 | ||
a3788d53 RS |
535 | /* Nonzero means multibyte characters were enabled when the echo area |
536 | message was specified. */ | |
5f5c8ee5 | 537 | |
a3788d53 RS |
538 | int message_enable_multibyte; |
539 | ||
4b41cebb | 540 | /* Nonzero if we should redraw the mode lines on the next redisplay. */ |
5f5c8ee5 | 541 | |
a2889657 JB |
542 | int update_mode_lines; |
543 | ||
5f5c8ee5 | 544 | /* Nonzero if window sizes or contents have changed since last |
4b41cebb | 545 | redisplay that finished. */ |
5f5c8ee5 | 546 | |
a2889657 JB |
547 | int windows_or_buffers_changed; |
548 | ||
5fb96e96 RS |
549 | /* Nonzero means a frame's cursor type has been changed. */ |
550 | ||
551 | int cursor_type_changed; | |
552 | ||
5f5c8ee5 GM |
553 | /* Nonzero after display_mode_line if %l was used and it displayed a |
554 | line number. */ | |
555 | ||
aa6d10fa RS |
556 | int line_number_displayed; |
557 | ||
558 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 559 | |
090703f4 | 560 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 561 | |
4b41cebb | 562 | /* Line width to consider when repositioning for line number display. */ |
5d121aec | 563 | |
31ade731 | 564 | static EMACS_INT line_number_display_limit_width; |
5d121aec | 565 | |
5f5c8ee5 GM |
566 | /* Number of lines to keep in the message log buffer. t means |
567 | infinite. nil means don't log at all. */ | |
568 | ||
5992c4f7 | 569 | Lisp_Object Vmessage_log_max; |
d45de95b | 570 | |
6a94510a GM |
571 | /* The name of the *Messages* buffer, a string. */ |
572 | ||
573 | static Lisp_Object Vmessages_buffer_name; | |
574 | ||
a8a1c0ee RS |
575 | /* Index 0 is the buffer that holds the current (desired) echo area message, |
576 | or nil if none is desired right now. | |
577 | ||
578 | Index 1 is the buffer that holds the previously displayed echo area message, | |
579 | or nil to indicate no message. This is normally what's on the screen now. | |
580 | ||
581 | These two can point to the same buffer. That happens when the last | |
582 | message output by the user (or made by echoing) has been displayed. */ | |
c6e89d6c GM |
583 | |
584 | Lisp_Object echo_area_buffer[2]; | |
585 | ||
a8a1c0ee RS |
586 | /* Permanent pointers to the two buffers that are used for echo area |
587 | purposes. Once the two buffers are made, and their pointers are | |
588 | placed here, these two slots remain unchanged unless those buffers | |
589 | need to be created afresh. */ | |
c6e89d6c GM |
590 | |
591 | static Lisp_Object echo_buffer[2]; | |
592 | ||
593 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
594 | ||
595 | static Lisp_Object Vwith_echo_area_save_vector; | |
596 | ||
597 | /* Non-zero means display_echo_area should display the last echo area | |
598 | message again. Set by redisplay_preserve_echo_area. */ | |
599 | ||
600 | static int display_last_displayed_message_p; | |
601 | ||
602 | /* Nonzero if echo area is being used by print; zero if being used by | |
603 | message. */ | |
604 | ||
605 | int message_buf_print; | |
606 | ||
e1477f43 GM |
607 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
608 | ||
609 | Lisp_Object Qinhibit_menubar_update; | |
610 | int inhibit_menubar_update; | |
611 | ||
9142dd5b GM |
612 | /* Maximum height for resizing mini-windows. Either a float |
613 | specifying a fraction of the available height, or an integer | |
614 | specifying a number of lines. */ | |
c6e89d6c | 615 | |
ad4f174e GM |
616 | Lisp_Object Vmax_mini_window_height; |
617 | ||
618 | /* Non-zero means messages should be displayed with truncated | |
619 | lines instead of being continued. */ | |
620 | ||
621 | int message_truncate_lines; | |
622 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 623 | |
6e019995 GM |
624 | /* Set to 1 in clear_message to make redisplay_internal aware |
625 | of an emptied echo area. */ | |
626 | ||
627 | static int message_cleared_p; | |
628 | ||
cfe03a41 KS |
629 | /* How to blink the default frame cursor off. */ |
630 | Lisp_Object Vblink_cursor_alist; | |
631 | ||
5f5c8ee5 GM |
632 | /* A scratch glyph row with contents used for generating truncation |
633 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 634 | |
5f5c8ee5 GM |
635 | #define MAX_SCRATCH_GLYPHS 100 |
636 | struct glyph_row scratch_glyph_row; | |
637 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 638 | |
5f5c8ee5 GM |
639 | /* Ascent and height of the last line processed by move_it_to. */ |
640 | ||
641 | static int last_max_ascent, last_height; | |
642 | ||
21fdfb65 GM |
643 | /* Non-zero if there's a help-echo in the echo area. */ |
644 | ||
645 | int help_echo_showing_p; | |
646 | ||
04612a64 GM |
647 | /* If >= 0, computed, exact values of mode-line and header-line height |
648 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
649 | CURRENT_HEADER_LINE_HEIGHT. */ | |
650 | ||
651 | int current_mode_line_height, current_header_line_height; | |
652 | ||
5f5c8ee5 | 653 | /* The maximum distance to look ahead for text properties. Values |
2311178e | 654 | that are too small let us call compute_char_face and similar |
5f5c8ee5 GM |
655 | functions too often which is expensive. Values that are too large |
656 | let us call compute_char_face and alike too often because we | |
657 | might not be interested in text properties that far away. */ | |
658 | ||
659 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
660 | ||
47589c8c GM |
661 | #if GLYPH_DEBUG |
662 | ||
76cb5e06 GM |
663 | /* Variables to turn off display optimizations from Lisp. */ |
664 | ||
665 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
666 | int inhibit_try_cursor_movement; | |
667 | ||
5f5c8ee5 GM |
668 | /* Non-zero means print traces of redisplay if compiled with |
669 | GLYPH_DEBUG != 0. */ | |
670 | ||
5f5c8ee5 | 671 | int trace_redisplay_p; |
47589c8c | 672 | |
546a4f00 | 673 | #endif /* GLYPH_DEBUG */ |
47589c8c | 674 | |
546a4f00 AI |
675 | #ifdef DEBUG_TRACE_MOVE |
676 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
677 | int trace_move; |
678 | ||
47589c8c GM |
679 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
680 | #else | |
91c3f500 | 681 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 682 | #endif |
2311178e | 683 | |
d475bcb8 GM |
684 | /* Non-zero means automatically scroll windows horizontally to make |
685 | point visible. */ | |
686 | ||
687 | int automatic_hscrolling_p; | |
688 | ||
1df7e8f0 EZ |
689 | /* How close to the margin can point get before the window is scrolled |
690 | horizontally. */ | |
5d335845 | 691 | EMACS_INT hscroll_margin; |
1df7e8f0 EZ |
692 | |
693 | /* How much to scroll horizontally when point is inside the above margin. */ | |
e76d28d5 | 694 | Lisp_Object Vhscroll_step; |
1df7e8f0 | 695 | |
6422c1d7 | 696 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 697 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
698 | display. If `grow-only', let mini-windows grow only until they |
699 | become empty. */ | |
700 | ||
701 | Lisp_Object Vresize_mini_windows; | |
702 | ||
82a7ab23 RS |
703 | /* Buffer being redisplayed -- for redisplay_window_error. */ |
704 | ||
705 | struct buffer *displayed_buffer; | |
706 | ||
5f5c8ee5 GM |
707 | /* Value returned from text property handlers (see below). */ |
708 | ||
709 | enum prop_handled | |
3c6595e0 | 710 | { |
5f5c8ee5 GM |
711 | HANDLED_NORMALLY, |
712 | HANDLED_RECOMPUTE_PROPS, | |
713 | HANDLED_OVERLAY_STRING_CONSUMED, | |
714 | HANDLED_RETURN | |
715 | }; | |
3c6595e0 | 716 | |
5f5c8ee5 GM |
717 | /* A description of text properties that redisplay is interested |
718 | in. */ | |
3c6595e0 | 719 | |
5f5c8ee5 GM |
720 | struct props |
721 | { | |
722 | /* The name of the property. */ | |
723 | Lisp_Object *name; | |
90adcf20 | 724 | |
5f5c8ee5 GM |
725 | /* A unique index for the property. */ |
726 | enum prop_idx idx; | |
727 | ||
728 | /* A handler function called to set up iterator IT from the property | |
729 | at IT's current position. Value is used to steer handle_stop. */ | |
730 | enum prop_handled (*handler) P_ ((struct it *it)); | |
731 | }; | |
732 | ||
733 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
734 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
735 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 736 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
737 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
738 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
739 | ||
740 | /* Properties handled by iterators. */ | |
741 | ||
742 | static struct props it_props[] = | |
5992c4f7 | 743 | { |
5f5c8ee5 GM |
744 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
745 | /* Handle `face' before `display' because some sub-properties of | |
746 | `display' need to know the face. */ | |
747 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
748 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
749 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 750 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
751 | {NULL, 0, NULL} |
752 | }; | |
5992c4f7 | 753 | |
5f5c8ee5 GM |
754 | /* Value is the position described by X. If X is a marker, value is |
755 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 756 | |
5f5c8ee5 | 757 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 758 | |
5f5c8ee5 | 759 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 760 | |
5f5c8ee5 GM |
761 | enum move_it_result |
762 | { | |
763 | /* Not used. Undefined value. */ | |
764 | MOVE_UNDEFINED, | |
bab29e15 | 765 | |
5f5c8ee5 GM |
766 | /* Move ended at the requested buffer position or ZV. */ |
767 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 768 | |
5f5c8ee5 GM |
769 | /* Move ended at the requested X pixel position. */ |
770 | MOVE_X_REACHED, | |
12adba34 | 771 | |
5f5c8ee5 GM |
772 | /* Move within a line ended at the end of a line that must be |
773 | continued. */ | |
774 | MOVE_LINE_CONTINUED, | |
2311178e | 775 | |
5f5c8ee5 GM |
776 | /* Move within a line ended at the end of a line that would |
777 | be displayed truncated. */ | |
778 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 779 | |
5f5c8ee5 GM |
780 | /* Move within a line ended at a line end. */ |
781 | MOVE_NEWLINE_OR_CR | |
782 | }; | |
12adba34 | 783 | |
1987b083 RS |
784 | /* This counter is used to clear the face cache every once in a while |
785 | in redisplay_internal. It is incremented for each redisplay. | |
786 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
787 | cleared. */ | |
788 | ||
789 | #define CLEAR_FACE_CACHE_COUNT 500 | |
790 | static int clear_face_cache_count; | |
791 | ||
418b5052 KS |
792 | /* Similarly for the image cache. */ |
793 | ||
794 | #ifdef HAVE_WINDOW_SYSTEM | |
795 | #define CLEAR_IMAGE_CACHE_COUNT 101 | |
796 | static int clear_image_cache_count; | |
797 | #endif | |
798 | ||
1987b083 RS |
799 | /* Record the previous terminal frame we displayed. */ |
800 | ||
801 | static struct frame *previous_terminal_frame; | |
802 | ||
803 | /* Non-zero while redisplay_internal is in progress. */ | |
804 | ||
805 | int redisplaying_p; | |
806 | ||
26683087 RS |
807 | /* Non-zero means don't free realized faces. Bound while freeing |
808 | realized faces is dangerous because glyph matrices might still | |
809 | reference them. */ | |
1987b083 | 810 | |
26683087 RS |
811 | int inhibit_free_realized_faces; |
812 | Lisp_Object Qinhibit_free_realized_faces; | |
ff6c30e5 | 813 | |
fa3c6b4d KS |
814 | /* If a string, XTread_socket generates an event to display that string. |
815 | (The display is done in read_char.) */ | |
816 | ||
817 | Lisp_Object help_echo_string; | |
818 | Lisp_Object help_echo_window; | |
819 | Lisp_Object help_echo_object; | |
820 | int help_echo_pos; | |
821 | ||
822 | /* Temporary variable for XTread_socket. */ | |
823 | ||
824 | Lisp_Object previous_help_echo_string; | |
825 | ||
2883e85a KS |
826 | /* Null glyph slice */ |
827 | ||
828 | static struct glyph_slice null_glyph_slice = { 0, 0, 0, 0 }; | |
fa3c6b4d | 829 | |
5f5c8ee5 GM |
830 | \f |
831 | /* Function prototypes. */ | |
832 | ||
064fd8ec | 833 | static void setup_for_ellipsis P_ ((struct it *, int)); |
43c09969 | 834 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
b2683be4 | 835 | static int single_display_spec_string_p P_ ((Lisp_Object, Lisp_Object)); |
74bd6d65 | 836 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
cafafe0b | 837 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 838 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 839 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
840 | |
841 | #if 0 | |
2e621225 | 842 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
843 | #endif |
844 | ||
2e621225 | 845 | static void pint2str P_ ((char *, int, int)); |
525b8b09 | 846 | static void pint2hrstr P_ ((char *, int, int)); |
2e621225 GM |
847 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, |
848 | struct text_pos)); | |
849 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
850 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
4c0e4b80 KS |
851 | static void store_mode_line_noprop_char P_ ((char)); |
852 | static int store_mode_line_noprop P_ ((const unsigned char *, int, int)); | |
2e621225 GM |
853 | static void x_consider_frame_title P_ ((Lisp_Object)); |
854 | static void handle_stop P_ ((struct it *)); | |
855 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
b2683be4 | 856 | static int single_display_spec_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 857 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
858 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
859 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 860 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
861 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
862 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 863 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
864 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
865 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
866 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 867 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
868 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
869 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 870 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
50f80c2f | 871 | static int string_char_and_length P_ ((const unsigned char *, int, int *)); |
5f5c8ee5 GM |
872 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
873 | struct text_pos)); | |
874 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 875 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 | 876 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
351b5434 KS |
877 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *, |
878 | Lisp_Object)); | |
5f5c8ee5 | 879 | static void extend_face_to_end_of_line P_ ((struct it *)); |
4933c603 | 880 | static int append_space_for_newline P_ ((struct it *, int)); |
e10ee30c | 881 | static int cursor_row_fully_visible_p P_ ((struct window *, int, int)); |
03b0a4b4 | 882 | static int try_scrolling P_ ((Lisp_Object, int, EMACS_INT, EMACS_INT, int, int)); |
47589c8c | 883 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
884 | static int trailing_whitespace_p P_ ((int)); |
885 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
886 | static void push_it P_ ((struct it *)); |
887 | static void pop_it P_ ((struct it *)); | |
888 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
dd429b03 | 889 | static void select_frame_for_redisplay P_ ((Lisp_Object)); |
5f5c8ee5 | 890 | static void redisplay_internal P_ ((int)); |
c6e89d6c | 891 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
892 | static void redisplay_windows P_ ((Lisp_Object)); |
893 | static void redisplay_window P_ ((Lisp_Object, int)); | |
82a7ab23 RS |
894 | static Lisp_Object redisplay_window_error (); |
895 | static Lisp_Object redisplay_window_0 P_ ((Lisp_Object)); | |
896 | static Lisp_Object redisplay_window_1 P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
897 | static void update_menu_bar P_ ((struct frame *, int)); |
898 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
899 | static int try_window_id P_ ((struct window *)); | |
900 | static int display_line P_ ((struct it *)); | |
715e84c9 | 901 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 902 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
c53a1624 | 903 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object, Lisp_Object, int)); |
fec8f23e | 904 | static int store_mode_line_string P_ ((char *, Lisp_Object, int, int, int, Lisp_Object)); |
72f62cb5 | 905 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
906 | static void display_menu_bar P_ ((struct window *)); |
907 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
908 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
909 | int, int, struct it *, int, int, int, int)); | |
910 | static void compute_line_metrics P_ ((struct it *)); | |
911 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 912 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 913 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
914 | static void reseat P_ ((struct it *, struct text_pos, int)); |
915 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
916 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
0b2e177e | 917 | void reseat_at_previous_visible_line_start P_ ((struct it *)); |
312246d1 | 918 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
a6f82cc4 | 919 | static int next_element_from_ellipsis P_ ((struct it *)); |
5f5c8ee5 GM |
920 | static int next_element_from_display_vector P_ ((struct it *)); |
921 | static int next_element_from_string P_ ((struct it *)); | |
922 | static int next_element_from_c_string P_ ((struct it *)); | |
923 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 924 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
925 | static int next_element_from_image P_ ((struct it *)); |
926 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 927 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
928 | static int init_from_display_pos P_ ((struct it *, struct window *, |
929 | struct display_pos *)); | |
5f5c8ee5 GM |
930 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
931 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
932 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
933 | int, int, int)); | |
934 | void move_it_vertically_backward P_ ((struct it *, int)); | |
935 | static void init_to_row_start P_ ((struct it *, struct window *, | |
936 | struct glyph_row *)); | |
47d57b22 GM |
937 | static int init_to_row_end P_ ((struct it *, struct window *, |
938 | struct glyph_row *)); | |
5f5c8ee5 | 939 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 940 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
941 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
942 | Lisp_Object, int)); | |
943 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
944 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
945 | static int number_of_chars P_ ((unsigned char *, int)); | |
946 | static void compute_stop_pos P_ ((struct it *)); | |
947 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
948 | Lisp_Object)); | |
949 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
950 | static int next_overlay_change P_ ((int)); | |
b2683be4 | 951 | static int handle_single_display_spec P_ ((struct it *, Lisp_Object, |
a61b7058 GM |
952 | Lisp_Object, struct text_pos *, |
953 | int)); | |
06a12811 | 954 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
955 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
956 | struct window *)); | |
5f5c8ee5 GM |
957 | |
958 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
959 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 960 | |
5f5c8ee5 | 961 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 962 | |
e037b9ec GM |
963 | static void update_tool_bar P_ ((struct frame *, int)); |
964 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
965 | static int redisplay_tool_bar P_ ((struct frame *)); | |
966 | static void display_tool_bar_line P_ ((struct it *)); | |
fa3c6b4d KS |
967 | static void notice_overwritten_cursor P_ ((struct window *, |
968 | enum glyph_row_area, | |
969 | int, int, int, int)); | |
970 | ||
971 | ||
12adba34 | 972 | |
5f5c8ee5 | 973 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 974 | |
5f5c8ee5 GM |
975 | \f |
976 | /*********************************************************************** | |
977 | Window display dimensions | |
978 | ***********************************************************************/ | |
12adba34 | 979 | |
40a301b3 RS |
980 | /* Return the bottom boundary y-position for text lines in window W. |
981 | This is the first y position at which a line cannot start. | |
982 | It is relative to the top of the window. | |
983 | ||
984 | This is the height of W minus the height of a mode line, if any. */ | |
5f5c8ee5 GM |
985 | |
986 | INLINE int | |
987 | window_text_bottom_y (w) | |
988 | struct window *w; | |
989 | { | |
da8b7f4f | 990 | int height = WINDOW_TOTAL_HEIGHT (w); |
1a578e9b | 991 | |
5f5c8ee5 GM |
992 | if (WINDOW_WANTS_MODELINE_P (w)) |
993 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
994 | return height; | |
f88eb0b6 KH |
995 | } |
996 | ||
5f5c8ee5 | 997 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 998 | means return the total width of W, not including fringes to |
5f5c8ee5 | 999 | the left and right of the window. */ |
ff6c30e5 | 1000 | |
5f5c8ee5 GM |
1001 | INLINE int |
1002 | window_box_width (w, area) | |
1003 | struct window *w; | |
1004 | int area; | |
1005 | { | |
da8b7f4f KS |
1006 | int cols = XFASTINT (w->total_cols); |
1007 | int pixels = 0; | |
2311178e | 1008 | |
5f5c8ee5 | 1009 | if (!w->pseudo_window_p) |
ff6c30e5 | 1010 | { |
da8b7f4f | 1011 | cols -= WINDOW_SCROLL_BAR_COLS (w); |
2311178e | 1012 | |
5f5c8ee5 GM |
1013 | if (area == TEXT_AREA) |
1014 | { | |
da8b7f4f KS |
1015 | if (INTEGERP (w->left_margin_cols)) |
1016 | cols -= XFASTINT (w->left_margin_cols); | |
1017 | if (INTEGERP (w->right_margin_cols)) | |
1018 | cols -= XFASTINT (w->right_margin_cols); | |
1019 | pixels = -WINDOW_TOTAL_FRINGE_WIDTH (w); | |
5f5c8ee5 GM |
1020 | } |
1021 | else if (area == LEFT_MARGIN_AREA) | |
da8b7f4f KS |
1022 | { |
1023 | cols = (INTEGERP (w->left_margin_cols) | |
1024 | ? XFASTINT (w->left_margin_cols) : 0); | |
1025 | pixels = 0; | |
1026 | } | |
5f5c8ee5 | 1027 | else if (area == RIGHT_MARGIN_AREA) |
da8b7f4f KS |
1028 | { |
1029 | cols = (INTEGERP (w->right_margin_cols) | |
1030 | ? XFASTINT (w->right_margin_cols) : 0); | |
1031 | pixels = 0; | |
1032 | } | |
ff6c30e5 | 1033 | } |
5f5c8ee5 | 1034 | |
da8b7f4f | 1035 | return cols * WINDOW_FRAME_COLUMN_WIDTH (w) + pixels; |
ff6c30e5 | 1036 | } |
1adc55de | 1037 | |
1adc55de | 1038 | |
5f5c8ee5 | 1039 | /* Return the pixel height of the display area of window W, not |
4b41cebb | 1040 | including mode lines of W, if any. */ |
f88eb0b6 | 1041 | |
5f5c8ee5 GM |
1042 | INLINE int |
1043 | window_box_height (w) | |
1044 | struct window *w; | |
f88eb0b6 | 1045 | { |
5f5c8ee5 | 1046 | struct frame *f = XFRAME (w->frame); |
da8b7f4f | 1047 | int height = WINDOW_TOTAL_HEIGHT (w); |
7ecd4937 GM |
1048 | |
1049 | xassert (height >= 0); | |
2311178e | 1050 | |
d9c9e99c MB |
1051 | /* Note: the code below that determines the mode-line/header-line |
1052 | height is essentially the same as that contained in the macro | |
1053 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
1054 | the appropriate glyph row has its `mode_line_p' flag set, | |
1055 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
1056 | ||
5f5c8ee5 | 1057 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
1058 | { |
1059 | struct glyph_row *ml_row | |
1060 | = (w->current_matrix && w->current_matrix->rows | |
1061 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
1062 | : 0); | |
1063 | if (ml_row && ml_row->mode_line_p) | |
1064 | height -= ml_row->height; | |
1065 | else | |
96d2320f | 1066 | height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w)); |
97dff879 | 1067 | } |
5f5c8ee5 | 1068 | |
045dee35 | 1069 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
1070 | { |
1071 | struct glyph_row *hl_row | |
1072 | = (w->current_matrix && w->current_matrix->rows | |
1073 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
1074 | : 0); | |
1075 | if (hl_row && hl_row->mode_line_p) | |
1076 | height -= hl_row->height; | |
1077 | else | |
1078 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
1079 | } | |
5f5c8ee5 | 1080 | |
7c75be36 PJ |
1081 | /* With a very small font and a mode-line that's taller than |
1082 | default, we might end up with a negative height. */ | |
1083 | return max (0, height); | |
5992c4f7 KH |
1084 | } |
1085 | ||
da8b7f4f KS |
1086 | /* Return the window-relative coordinate of the left edge of display |
1087 | area AREA of window W. AREA < 0 means return the left edge of the | |
1088 | whole window, to the right of the left fringe of W. */ | |
1089 | ||
1090 | INLINE int | |
1091 | window_box_left_offset (w, area) | |
1092 | struct window *w; | |
1093 | int area; | |
1094 | { | |
1095 | int x; | |
1096 | ||
1097 | if (w->pseudo_window_p) | |
1098 | return 0; | |
1099 | ||
1100 | x = WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (w); | |
1101 | ||
1102 | if (area == TEXT_AREA) | |
1103 | x += (WINDOW_LEFT_FRINGE_WIDTH (w) | |
1104 | + window_box_width (w, LEFT_MARGIN_AREA)); | |
1105 | else if (area == RIGHT_MARGIN_AREA) | |
1106 | x += (WINDOW_LEFT_FRINGE_WIDTH (w) | |
1107 | + window_box_width (w, LEFT_MARGIN_AREA) | |
1108 | + window_box_width (w, TEXT_AREA) | |
1109 | + (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
1110 | ? 0 | |
1111 | : WINDOW_RIGHT_FRINGE_WIDTH (w))); | |
1112 | else if (area == LEFT_MARGIN_AREA | |
1113 | && WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)) | |
1114 | x += WINDOW_LEFT_FRINGE_WIDTH (w); | |
1115 | ||
1116 | return x; | |
1117 | } | |
1118 | ||
1119 | ||
1120 | /* Return the window-relative coordinate of the right edge of display | |
1121 | area AREA of window W. AREA < 0 means return the left edge of the | |
1122 | whole window, to the left of the right fringe of W. */ | |
1123 | ||
1124 | INLINE int | |
1125 | window_box_right_offset (w, area) | |
1126 | struct window *w; | |
1127 | int area; | |
1128 | { | |
1129 | return window_box_left_offset (w, area) + window_box_width (w, area); | |
1130 | } | |
5992c4f7 | 1131 | |
5f5c8ee5 GM |
1132 | /* Return the frame-relative coordinate of the left edge of display |
1133 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 1134 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 1135 | |
5f5c8ee5 GM |
1136 | INLINE int |
1137 | window_box_left (w, area) | |
1138 | struct window *w; | |
1139 | int area; | |
90adcf20 | 1140 | { |
5f5c8ee5 | 1141 | struct frame *f = XFRAME (w->frame); |
da8b7f4f | 1142 | int x; |
a3788d53 | 1143 | |
da8b7f4f KS |
1144 | if (w->pseudo_window_p) |
1145 | return FRAME_INTERNAL_BORDER_WIDTH (f); | |
2311178e | 1146 | |
da8b7f4f KS |
1147 | x = (WINDOW_LEFT_EDGE_X (w) |
1148 | + window_box_left_offset (w, area)); | |
73af359d | 1149 | |
5f5c8ee5 | 1150 | return x; |
2311178e | 1151 | } |
90adcf20 | 1152 | |
b6436d4e | 1153 | |
5f5c8ee5 GM |
1154 | /* Return the frame-relative coordinate of the right edge of display |
1155 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 1156 | whole window, to the left of the right fringe of W. */ |
ded34426 | 1157 | |
5f5c8ee5 GM |
1158 | INLINE int |
1159 | window_box_right (w, area) | |
1160 | struct window *w; | |
1161 | int area; | |
1162 | { | |
1163 | return window_box_left (w, area) + window_box_width (w, area); | |
2311178e TTN |
1164 | } |
1165 | ||
5f5c8ee5 GM |
1166 | /* Get the bounding box of the display area AREA of window W, without |
1167 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 1168 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
1169 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
1170 | coordinates of the upper-left corner of the box. Return in | |
1171 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
1172 | ||
1173 | INLINE void | |
1174 | window_box (w, area, box_x, box_y, box_width, box_height) | |
1175 | struct window *w; | |
1176 | int area; | |
1177 | int *box_x, *box_y, *box_width, *box_height; | |
1178 | { | |
da8b7f4f KS |
1179 | if (box_width) |
1180 | *box_width = window_box_width (w, area); | |
1181 | if (box_height) | |
1182 | *box_height = window_box_height (w); | |
1183 | if (box_x) | |
1184 | *box_x = window_box_left (w, area); | |
1185 | if (box_y) | |
1186 | { | |
1187 | *box_y = WINDOW_TOP_EDGE_Y (w); | |
1188 | if (WINDOW_WANTS_HEADER_LINE_P (w)) | |
1189 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
1190 | } | |
ded34426 | 1191 | } |
1adc55de | 1192 | |
1adc55de | 1193 | |
5f5c8ee5 | 1194 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
1195 | mode lines. AREA < 0 means the whole window, not including the |
1196 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
1197 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
1198 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
1199 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
1200 | box. */ | |
ded34426 | 1201 | |
5f5c8ee5 GM |
1202 | INLINE void |
1203 | window_box_edges (w, area, top_left_x, top_left_y, | |
1204 | bottom_right_x, bottom_right_y) | |
1205 | struct window *w; | |
1206 | int area; | |
1207 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 1208 | { |
5f5c8ee5 GM |
1209 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
1210 | bottom_right_y); | |
1211 | *bottom_right_x += *top_left_x; | |
1212 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
1213 | } |
1214 | ||
5f5c8ee5 GM |
1215 | |
1216 | \f | |
1217 | /*********************************************************************** | |
1218 | Utilities | |
1219 | ***********************************************************************/ | |
1220 | ||
8b6ea97f GM |
1221 | /* Return the bottom y-position of the line the iterator IT is in. |
1222 | This can modify IT's settings. */ | |
1223 | ||
1224 | int | |
1225 | line_bottom_y (it) | |
1226 | struct it *it; | |
1227 | { | |
1228 | int line_height = it->max_ascent + it->max_descent; | |
1229 | int line_top_y = it->current_y; | |
2311178e | 1230 | |
8b6ea97f GM |
1231 | if (line_height == 0) |
1232 | { | |
1233 | if (last_height) | |
1234 | line_height = last_height; | |
1235 | else if (IT_CHARPOS (*it) < ZV) | |
1236 | { | |
1237 | move_it_by_lines (it, 1, 1); | |
1238 | line_height = (it->max_ascent || it->max_descent | |
1239 | ? it->max_ascent + it->max_descent | |
1240 | : last_height); | |
1241 | } | |
1242 | else | |
1243 | { | |
1244 | struct glyph_row *row = it->glyph_row; | |
2311178e | 1245 | |
8b6ea97f GM |
1246 | /* Use the default character height. */ |
1247 | it->glyph_row = NULL; | |
1248 | it->what = IT_CHARACTER; | |
1249 | it->c = ' '; | |
1250 | it->len = 1; | |
1251 | PRODUCE_GLYPHS (it); | |
1252 | line_height = it->ascent + it->descent; | |
1253 | it->glyph_row = row; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | return line_top_y + line_height; | |
1258 | } | |
1259 | ||
1260 | ||
f15f5495 KS |
1261 | /* Return 1 if position CHARPOS is visible in window W. |
1262 | If visible, set *X and *Y to pixel coordinates of top left corner. | |
1263 | Set *RTOP and *RBOT to pixel height of an invisible area of glyph at POS. | |
0db95684 GM |
1264 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line |
1265 | and header-lines heights. */ | |
3a641a69 GM |
1266 | |
1267 | int | |
f15f5495 | 1268 | pos_visible_p (w, charpos, x, y, rtop, rbot, exact_mode_line_heights_p) |
3a641a69 | 1269 | struct window *w; |
f15f5495 | 1270 | int charpos, *x, *y, *rtop, *rbot, exact_mode_line_heights_p; |
3a641a69 GM |
1271 | { |
1272 | struct it it; | |
1273 | struct text_pos top; | |
a2962d06 | 1274 | int visible_p = 0; |
fcab1954 GM |
1275 | struct buffer *old_buffer = NULL; |
1276 | ||
a2962d06 KS |
1277 | if (noninteractive) |
1278 | return visible_p; | |
1279 | ||
fcab1954 GM |
1280 | if (XBUFFER (w->buffer) != current_buffer) |
1281 | { | |
1282 | old_buffer = current_buffer; | |
1283 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1284 | } | |
3a641a69 | 1285 | |
3a641a69 | 1286 | SET_TEXT_POS_FROM_MARKER (top, w->start); |
2311178e | 1287 | |
04612a64 GM |
1288 | /* Compute exact mode line heights, if requested. */ |
1289 | if (exact_mode_line_heights_p) | |
1290 | { | |
1291 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1292 | current_mode_line_height | |
96d2320f | 1293 | = display_mode_line (w, CURRENT_MODE_LINE_FACE_ID (w), |
04612a64 | 1294 | current_buffer->mode_line_format); |
2311178e | 1295 | |
04612a64 GM |
1296 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
1297 | current_header_line_height | |
1298 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1299 | current_buffer->header_line_format); | |
1300 | } | |
3a641a69 | 1301 | |
04612a64 | 1302 | start_display (&it, w, top); |
e10ee30c KS |
1303 | move_it_to (&it, charpos, -1, it.last_visible_y, -1, |
1304 | MOVE_TO_POS | MOVE_TO_Y); | |
a13be207 GM |
1305 | |
1306 | /* Note that we may overshoot because of invisible text. */ | |
1307 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1308 | { |
8964fd83 | 1309 | int top_x = it.current_x; |
8b6ea97f | 1310 | int top_y = it.current_y; |
78465f3a | 1311 | int bottom_y = (last_height = 0, line_bottom_y (&it)); |
da8b7f4f | 1312 | int window_top_y = WINDOW_HEADER_LINE_HEIGHT (w); |
2311178e | 1313 | |
8b6ea97f GM |
1314 | if (top_y < window_top_y) |
1315 | visible_p = bottom_y > window_top_y; | |
1316 | else if (top_y < it.last_visible_y) | |
fcab1954 | 1317 | visible_p = 1; |
8964fd83 | 1318 | if (visible_p) |
e893970b | 1319 | { |
8964fd83 | 1320 | *x = top_x; |
78465f3a | 1321 | *y = max (top_y + max (0, it.max_ascent - it.ascent), window_top_y); |
8964fd83 KS |
1322 | *rtop = max (0, window_top_y - top_y); |
1323 | *rbot = max (0, bottom_y - it.last_visible_y); | |
e893970b | 1324 | } |
3a641a69 | 1325 | } |
e10ee30c | 1326 | else |
3a641a69 | 1327 | { |
e893970b KS |
1328 | struct it it2; |
1329 | ||
1330 | it2 = it; | |
e10ee30c KS |
1331 | if (IT_CHARPOS (it) < ZV && FETCH_BYTE (IT_BYTEPOS (it)) != '\n') |
1332 | move_it_by_lines (&it, 1, 0); | |
3a641a69 GM |
1333 | if (charpos < IT_CHARPOS (it)) |
1334 | { | |
1335 | visible_p = 1; | |
8964fd83 KS |
1336 | move_it_to (&it2, charpos, -1, -1, -1, MOVE_TO_POS); |
1337 | *x = it2.current_x; | |
1338 | *y = it2.current_y + it2.max_ascent - it2.ascent; | |
1339 | *rtop = max (0, -it2.current_y); | |
1340 | *rbot = max (0, ((it2.current_y + it2.max_ascent + it2.max_descent) | |
1341 | - it.last_visible_y)); | |
3a641a69 GM |
1342 | } |
1343 | } | |
fcab1954 GM |
1344 | |
1345 | if (old_buffer) | |
1346 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1347 | |
1348 | current_header_line_height = current_mode_line_height = -1; | |
e893970b | 1349 | |
d182d87c | 1350 | if (visible_p && XFASTINT (w->hscroll) > 0) |
8460eb1e | 1351 | *x -= XFASTINT (w->hscroll) * WINDOW_FRAME_COLUMN_WIDTH (w); |
69036b87 | 1352 | |
3a641a69 GM |
1353 | return visible_p; |
1354 | } | |
1355 | ||
1356 | ||
4fdb80f2 GM |
1357 | /* Return the next character from STR which is MAXLEN bytes long. |
1358 | Return in *LEN the length of the character. This is like | |
1359 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1360 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1361 | character. */ |
1362 | ||
1363 | static INLINE int | |
7a5b8a93 | 1364 | string_char_and_length (str, maxlen, len) |
50f80c2f | 1365 | const unsigned char *str; |
7a5b8a93 | 1366 | int maxlen, *len; |
4fdb80f2 GM |
1367 | { |
1368 | int c; | |
1369 | ||
1370 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1371 | if (!CHAR_VALID_P (c, 1)) | |
1372 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1373 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1374 | characters. */ |
1375 | c = '?'; | |
1376 | ||
1377 | return c; | |
1378 | } | |
1379 | ||
1380 | ||
1381 | ||
5f5c8ee5 GM |
1382 | /* Given a position POS containing a valid character and byte position |
1383 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1384 | ||
1385 | static struct text_pos | |
1386 | string_pos_nchars_ahead (pos, string, nchars) | |
1387 | struct text_pos pos; | |
1388 | Lisp_Object string; | |
1389 | int nchars; | |
0b1005ef | 1390 | { |
5f5c8ee5 GM |
1391 | xassert (STRINGP (string) && nchars >= 0); |
1392 | ||
1393 | if (STRING_MULTIBYTE (string)) | |
1394 | { | |
2051c264 | 1395 | int rest = SBYTES (string) - BYTEPOS (pos); |
50f80c2f | 1396 | const unsigned char *p = SDATA (string) + BYTEPOS (pos); |
5f5c8ee5 GM |
1397 | int len; |
1398 | ||
1399 | while (nchars--) | |
1400 | { | |
4fdb80f2 | 1401 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1402 | p += len, rest -= len; |
1403 | xassert (rest >= 0); | |
1404 | CHARPOS (pos) += 1; | |
1405 | BYTEPOS (pos) += len; | |
1406 | } | |
1407 | } | |
1408 | else | |
1409 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1410 | ||
1411 | return pos; | |
0a9dc68b RS |
1412 | } |
1413 | ||
0a9dc68b | 1414 | |
5f5c8ee5 GM |
1415 | /* Value is the text position, i.e. character and byte position, |
1416 | for character position CHARPOS in STRING. */ | |
1417 | ||
1418 | static INLINE struct text_pos | |
1419 | string_pos (charpos, string) | |
1420 | int charpos; | |
0a9dc68b | 1421 | Lisp_Object string; |
0a9dc68b | 1422 | { |
5f5c8ee5 GM |
1423 | struct text_pos pos; |
1424 | xassert (STRINGP (string)); | |
1425 | xassert (charpos >= 0); | |
1426 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1427 | return pos; | |
1428 | } | |
1429 | ||
1430 | ||
1431 | /* Value is a text position, i.e. character and byte position, for | |
1432 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1433 | means recognize multibyte characters. */ | |
1434 | ||
1435 | static struct text_pos | |
1436 | c_string_pos (charpos, s, multibyte_p) | |
1437 | int charpos; | |
1438 | unsigned char *s; | |
1439 | int multibyte_p; | |
1440 | { | |
1441 | struct text_pos pos; | |
1442 | ||
1443 | xassert (s != NULL); | |
1444 | xassert (charpos >= 0); | |
1445 | ||
1446 | if (multibyte_p) | |
0a9dc68b | 1447 | { |
5f5c8ee5 GM |
1448 | int rest = strlen (s), len; |
1449 | ||
1450 | SET_TEXT_POS (pos, 0, 0); | |
1451 | while (charpos--) | |
0a9dc68b | 1452 | { |
4fdb80f2 | 1453 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1454 | s += len, rest -= len; |
1455 | xassert (rest >= 0); | |
1456 | CHARPOS (pos) += 1; | |
1457 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1458 | } |
1459 | } | |
5f5c8ee5 GM |
1460 | else |
1461 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1462 | |
5f5c8ee5 GM |
1463 | return pos; |
1464 | } | |
0a9dc68b | 1465 | |
0a9dc68b | 1466 | |
5f5c8ee5 GM |
1467 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1468 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1469 | |
5f5c8ee5 GM |
1470 | static int |
1471 | number_of_chars (s, multibyte_p) | |
1472 | unsigned char *s; | |
1473 | int multibyte_p; | |
1474 | { | |
1475 | int nchars; | |
2311178e | 1476 | |
5f5c8ee5 GM |
1477 | if (multibyte_p) |
1478 | { | |
1479 | int rest = strlen (s), len; | |
1480 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1481 | |
5f5c8ee5 GM |
1482 | for (nchars = 0; rest > 0; ++nchars) |
1483 | { | |
4fdb80f2 | 1484 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1485 | rest -= len, p += len; |
0a9dc68b RS |
1486 | } |
1487 | } | |
5f5c8ee5 GM |
1488 | else |
1489 | nchars = strlen (s); | |
1490 | ||
1491 | return nchars; | |
0b1005ef KH |
1492 | } |
1493 | ||
2311178e | 1494 | |
5f5c8ee5 GM |
1495 | /* Compute byte position NEWPOS->bytepos corresponding to |
1496 | NEWPOS->charpos. POS is a known position in string STRING. | |
1497 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1498 | |
5f5c8ee5 GM |
1499 | static void |
1500 | compute_string_pos (newpos, pos, string) | |
1501 | struct text_pos *newpos, pos; | |
1502 | Lisp_Object string; | |
76412d64 | 1503 | { |
5f5c8ee5 GM |
1504 | xassert (STRINGP (string)); |
1505 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
2311178e | 1506 | |
5f5c8ee5 | 1507 | if (STRING_MULTIBYTE (string)) |
6fc556fd KR |
1508 | *newpos = string_pos_nchars_ahead (pos, string, |
1509 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1510 | else |
1511 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1512 | } |
1513 | ||
fa3c6b4d KS |
1514 | /* EXPORT: |
1515 | Return an estimation of the pixel height of mode or top lines on | |
1516 | frame F. FACE_ID specifies what line's height to estimate. */ | |
1517 | ||
1518 | int | |
1519 | estimate_mode_line_height (f, face_id) | |
1520 | struct frame *f; | |
1521 | enum face_id face_id; | |
1522 | { | |
1523 | #ifdef HAVE_WINDOW_SYSTEM | |
1524 | if (FRAME_WINDOW_P (f)) | |
1525 | { | |
1526 | int height = FONT_HEIGHT (FRAME_FONT (f)); | |
1527 | ||
1528 | /* This function is called so early when Emacs starts that the face | |
1529 | cache and mode line face are not yet initialized. */ | |
1530 | if (FRAME_FACE_CACHE (f)) | |
1531 | { | |
1532 | struct face *face = FACE_FROM_ID (f, face_id); | |
1533 | if (face) | |
1534 | { | |
1535 | if (face->font) | |
1536 | height = FONT_HEIGHT (face->font); | |
1537 | if (face->box_line_width > 0) | |
1538 | height += 2 * face->box_line_width; | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | return height; | |
1543 | } | |
1544 | #endif | |
1545 | ||
1546 | return 1; | |
1547 | } | |
1548 | ||
e080d3eb KS |
1549 | /* Given a pixel position (PIX_X, PIX_Y) on frame F, return glyph |
1550 | co-ordinates in (*X, *Y). Set *BOUNDS to the rectangle that the | |
1551 | glyph at X, Y occupies, if BOUNDS != 0. If NOCLIP is non-zero, do | |
1552 | not force the value into range. */ | |
1553 | ||
1554 | void | |
1555 | pixel_to_glyph_coords (f, pix_x, pix_y, x, y, bounds, noclip) | |
1556 | FRAME_PTR f; | |
1557 | register int pix_x, pix_y; | |
1558 | int *x, *y; | |
1559 | NativeRectangle *bounds; | |
1560 | int noclip; | |
1561 | { | |
1562 | ||
1563 | #ifdef HAVE_WINDOW_SYSTEM | |
1564 | if (FRAME_WINDOW_P (f)) | |
1565 | { | |
da8b7f4f | 1566 | /* Arrange for the division in FRAME_PIXEL_X_TO_COL etc. to round down |
e080d3eb KS |
1567 | even for negative values. */ |
1568 | if (pix_x < 0) | |
da8b7f4f | 1569 | pix_x -= FRAME_COLUMN_WIDTH (f) - 1; |
e080d3eb | 1570 | if (pix_y < 0) |
da8b7f4f | 1571 | pix_y -= FRAME_LINE_HEIGHT (f) - 1; |
e080d3eb | 1572 | |
da8b7f4f KS |
1573 | pix_x = FRAME_PIXEL_X_TO_COL (f, pix_x); |
1574 | pix_y = FRAME_PIXEL_Y_TO_LINE (f, pix_y); | |
e080d3eb KS |
1575 | |
1576 | if (bounds) | |
1577 | STORE_NATIVE_RECT (*bounds, | |
da8b7f4f KS |
1578 | FRAME_COL_TO_PIXEL_X (f, pix_x), |
1579 | FRAME_LINE_TO_PIXEL_Y (f, pix_y), | |
1580 | FRAME_COLUMN_WIDTH (f) - 1, | |
1581 | FRAME_LINE_HEIGHT (f) - 1); | |
e080d3eb KS |
1582 | |
1583 | if (!noclip) | |
1584 | { | |
1585 | if (pix_x < 0) | |
1586 | pix_x = 0; | |
da8b7f4f KS |
1587 | else if (pix_x > FRAME_TOTAL_COLS (f)) |
1588 | pix_x = FRAME_TOTAL_COLS (f); | |
e080d3eb KS |
1589 | |
1590 | if (pix_y < 0) | |
1591 | pix_y = 0; | |
da8b7f4f KS |
1592 | else if (pix_y > FRAME_LINES (f)) |
1593 | pix_y = FRAME_LINES (f); | |
e080d3eb KS |
1594 | } |
1595 | } | |
1596 | #endif | |
1597 | ||
1598 | *x = pix_x; | |
1599 | *y = pix_y; | |
1600 | } | |
1601 | ||
1602 | ||
1603 | /* Given HPOS/VPOS in the current matrix of W, return corresponding | |
1604 | frame-relative pixel positions in *FRAME_X and *FRAME_Y. If we | |
1605 | can't tell the positions because W's display is not up to date, | |
1606 | return 0. */ | |
1607 | ||
1608 | int | |
1609 | glyph_to_pixel_coords (w, hpos, vpos, frame_x, frame_y) | |
1610 | struct window *w; | |
1611 | int hpos, vpos; | |
1612 | int *frame_x, *frame_y; | |
1613 | { | |
1614 | #ifdef HAVE_WINDOW_SYSTEM | |
1615 | if (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))) | |
1616 | { | |
1617 | int success_p; | |
1618 | ||
1619 | xassert (hpos >= 0 && hpos < w->current_matrix->matrix_w); | |
1620 | xassert (vpos >= 0 && vpos < w->current_matrix->matrix_h); | |
1621 | ||
1622 | if (display_completed) | |
1623 | { | |
1624 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, vpos); | |
1625 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
1626 | struct glyph *end = glyph + min (hpos, row->used[TEXT_AREA]); | |
1627 | ||
1628 | hpos = row->x; | |
1629 | vpos = row->y; | |
1630 | while (glyph < end) | |
1631 | { | |
1632 | hpos += glyph->pixel_width; | |
1633 | ++glyph; | |
1634 | } | |
1635 | ||
f65536fa KS |
1636 | /* If first glyph is partially visible, its first visible position is still 0. */ |
1637 | if (hpos < 0) | |
1638 | hpos = 0; | |
1639 | ||
e080d3eb KS |
1640 | success_p = 1; |
1641 | } | |
1642 | else | |
1643 | { | |
1644 | hpos = vpos = 0; | |
1645 | success_p = 0; | |
1646 | } | |
1647 | ||
1648 | *frame_x = WINDOW_TO_FRAME_PIXEL_X (w, hpos); | |
1649 | *frame_y = WINDOW_TO_FRAME_PIXEL_Y (w, vpos); | |
1650 | return success_p; | |
1651 | } | |
1652 | #endif | |
1653 | ||
1654 | *frame_x = hpos; | |
1655 | *frame_y = vpos; | |
1656 | return 1; | |
1657 | } | |
1658 | ||
1659 | ||
fa3c6b4d KS |
1660 | #ifdef HAVE_WINDOW_SYSTEM |
1661 | ||
1662 | /* Find the glyph under window-relative coordinates X/Y in window W. | |
1663 | Consider only glyphs from buffer text, i.e. no glyphs from overlay | |
1664 | strings. Return in *HPOS and *VPOS the row and column number of | |
1665 | the glyph found. Return in *AREA the glyph area containing X. | |
1666 | Value is a pointer to the glyph found or null if X/Y is not on | |
1667 | text, or we can't tell because W's current matrix is not up to | |
1668 | date. */ | |
1669 | ||
1670 | static struct glyph * | |
493fdc3c | 1671 | x_y_to_hpos_vpos (w, x, y, hpos, vpos, dx, dy, area) |
fa3c6b4d KS |
1672 | struct window *w; |
1673 | int x, y; | |
493fdc3c | 1674 | int *hpos, *vpos, *dx, *dy, *area; |
fa3c6b4d KS |
1675 | { |
1676 | struct glyph *glyph, *end; | |
1677 | struct glyph_row *row = NULL; | |
da8b7f4f | 1678 | int x0, i; |
fa3c6b4d KS |
1679 | |
1680 | /* Find row containing Y. Give up if some row is not enabled. */ | |
1681 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
1682 | { | |
1683 | row = MATRIX_ROW (w->current_matrix, i); | |
1684 | if (!row->enabled_p) | |
1685 | return NULL; | |
1686 | if (y >= row->y && y < MATRIX_ROW_BOTTOM_Y (row)) | |
1687 | break; | |
1688 | } | |
1689 | ||
1690 | *vpos = i; | |
1691 | *hpos = 0; | |
1692 | ||
1693 | /* Give up if Y is not in the window. */ | |
1694 | if (i == w->current_matrix->nrows) | |
1695 | return NULL; | |
1696 | ||
1697 | /* Get the glyph area containing X. */ | |
1698 | if (w->pseudo_window_p) | |
1699 | { | |
1700 | *area = TEXT_AREA; | |
1701 | x0 = 0; | |
1702 | } | |
1703 | else | |
1704 | { | |
da8b7f4f | 1705 | if (x < window_box_left_offset (w, TEXT_AREA)) |
fa3c6b4d KS |
1706 | { |
1707 | *area = LEFT_MARGIN_AREA; | |
da8b7f4f | 1708 | x0 = window_box_left_offset (w, LEFT_MARGIN_AREA); |
fa3c6b4d | 1709 | } |
da8b7f4f | 1710 | else if (x < window_box_right_offset (w, TEXT_AREA)) |
fa3c6b4d KS |
1711 | { |
1712 | *area = TEXT_AREA; | |
f65536fa | 1713 | x0 = window_box_left_offset (w, TEXT_AREA) + min (row->x, 0); |
fa3c6b4d KS |
1714 | } |
1715 | else | |
1716 | { | |
1717 | *area = RIGHT_MARGIN_AREA; | |
da8b7f4f | 1718 | x0 = window_box_left_offset (w, RIGHT_MARGIN_AREA); |
fa3c6b4d KS |
1719 | } |
1720 | } | |
1721 | ||
1722 | /* Find glyph containing X. */ | |
1723 | glyph = row->glyphs[*area]; | |
1724 | end = glyph + row->used[*area]; | |
493fdc3c KS |
1725 | x -= x0; |
1726 | while (glyph < end && x >= glyph->pixel_width) | |
fa3c6b4d | 1727 | { |
493fdc3c | 1728 | x -= glyph->pixel_width; |
fa3c6b4d KS |
1729 | ++glyph; |
1730 | } | |
1731 | ||
1732 | if (glyph == end) | |
1733 | return NULL; | |
1734 | ||
493fdc3c KS |
1735 | if (dx) |
1736 | { | |
1737 | *dx = x; | |
1738 | *dy = y - (row->y + row->ascent - glyph->ascent); | |
1739 | } | |
1740 | ||
fa3c6b4d KS |
1741 | *hpos = glyph - row->glyphs[*area]; |
1742 | return glyph; | |
1743 | } | |
1744 | ||
1745 | ||
1746 | /* EXPORT: | |
1747 | Convert frame-relative x/y to coordinates relative to window W. | |
1748 | Takes pseudo-windows into account. */ | |
1749 | ||
1750 | void | |
1751 | frame_to_window_pixel_xy (w, x, y) | |
1752 | struct window *w; | |
1753 | int *x, *y; | |
1754 | { | |
1755 | if (w->pseudo_window_p) | |
1756 | { | |
1757 | /* A pseudo-window is always full-width, and starts at the | |
1758 | left edge of the frame, plus a frame border. */ | |
1759 | struct frame *f = XFRAME (w->frame); | |
da8b7f4f | 1760 | *x -= FRAME_INTERNAL_BORDER_WIDTH (f); |
fa3c6b4d KS |
1761 | *y = FRAME_TO_WINDOW_PIXEL_Y (w, *y); |
1762 | } | |
1763 | else | |
1764 | { | |
da8b7f4f | 1765 | *x -= WINDOW_LEFT_EDGE_X (w); |
fa3c6b4d KS |
1766 | *y = FRAME_TO_WINDOW_PIXEL_Y (w, *y); |
1767 | } | |
1768 | } | |
1769 | ||
1770 | /* EXPORT: | |
a66678fd YM |
1771 | Return in RECTS[] at most N clipping rectangles for glyph string S. |
1772 | Return the number of stored rectangles. */ | |
fa3c6b4d | 1773 | |
a66678fd YM |
1774 | int |
1775 | get_glyph_string_clip_rects (s, rects, n) | |
fa3c6b4d | 1776 | struct glyph_string *s; |
a66678fd YM |
1777 | NativeRectangle *rects; |
1778 | int n; | |
fa3c6b4d KS |
1779 | { |
1780 | XRectangle r; | |
1781 | ||
a66678fd YM |
1782 | if (n <= 0) |
1783 | return 0; | |
1784 | ||
fa3c6b4d KS |
1785 | if (s->row->full_width_p) |
1786 | { | |
da8b7f4f KS |
1787 | /* Draw full-width. X coordinates are relative to S->w->left_col. */ |
1788 | r.x = WINDOW_LEFT_EDGE_X (s->w); | |
1789 | r.width = WINDOW_TOTAL_WIDTH (s->w); | |
fa3c6b4d KS |
1790 | |
1791 | /* Unless displaying a mode or menu bar line, which are always | |
1792 | fully visible, clip to the visible part of the row. */ | |
1793 | if (s->w->pseudo_window_p) | |
1794 | r.height = s->row->visible_height; | |
1795 | else | |
1796 | r.height = s->height; | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | /* This is a text line that may be partially visible. */ | |
da8b7f4f | 1801 | r.x = window_box_left (s->w, s->area); |
fa3c6b4d KS |
1802 | r.width = window_box_width (s->w, s->area); |
1803 | r.height = s->row->visible_height; | |
1804 | } | |
1805 | ||
8c2da0fa ST |
1806 | if (s->clip_head) |
1807 | if (r.x < s->clip_head->x) | |
1808 | { | |
1809 | if (r.width >= s->clip_head->x - r.x) | |
1810 | r.width -= s->clip_head->x - r.x; | |
1811 | else | |
1812 | r.width = 0; | |
1813 | r.x = s->clip_head->x; | |
1814 | } | |
1815 | if (s->clip_tail) | |
1816 | if (r.x + r.width > s->clip_tail->x + s->clip_tail->background_width) | |
1817 | { | |
1818 | if (s->clip_tail->x + s->clip_tail->background_width >= r.x) | |
1819 | r.width = s->clip_tail->x + s->clip_tail->background_width - r.x; | |
1820 | else | |
1821 | r.width = 0; | |
1822 | } | |
1823 | ||
fa3c6b4d KS |
1824 | /* If S draws overlapping rows, it's sufficient to use the top and |
1825 | bottom of the window for clipping because this glyph string | |
1826 | intentionally draws over other lines. */ | |
a66678fd | 1827 | if (s->for_overlaps) |
fa3c6b4d | 1828 | { |
da8b7f4f | 1829 | r.y = WINDOW_HEADER_LINE_HEIGHT (s->w); |
fa3c6b4d | 1830 | r.height = window_text_bottom_y (s->w) - r.y; |
a66678fd YM |
1831 | |
1832 | /* Alas, the above simple strategy does not work for the | |
1833 | environments with anti-aliased text: if the same text is | |
1834 | drawn onto the same place multiple times, it gets thicker. | |
1835 | If the overlap we are processing is for the erased cursor, we | |
1836 | take the intersection with the rectagle of the cursor. */ | |
1837 | if (s->for_overlaps & OVERLAPS_ERASED_CURSOR) | |
1838 | { | |
1839 | XRectangle rc, r_save = r; | |
1840 | ||
1841 | rc.x = WINDOW_TEXT_TO_FRAME_PIXEL_X (s->w, s->w->phys_cursor.x); | |
1842 | rc.y = s->w->phys_cursor.y; | |
1843 | rc.width = s->w->phys_cursor_width; | |
1844 | rc.height = s->w->phys_cursor_height; | |
1845 | ||
1846 | x_intersect_rectangles (&r_save, &rc, &r); | |
1847 | } | |
fa3c6b4d KS |
1848 | } |
1849 | else | |
1850 | { | |
1851 | /* Don't use S->y for clipping because it doesn't take partially | |
1852 | visible lines into account. For example, it can be negative for | |
1853 | partially visible lines at the top of a window. */ | |
1854 | if (!s->row->full_width_p | |
1855 | && MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (s->w, s->row)) | |
da8b7f4f | 1856 | r.y = WINDOW_HEADER_LINE_HEIGHT (s->w); |
fa3c6b4d KS |
1857 | else |
1858 | r.y = max (0, s->row->y); | |
1859 | ||
1860 | /* If drawing a tool-bar window, draw it over the internal border | |
1861 | at the top of the window. */ | |
94c4db3c SM |
1862 | if (WINDOWP (s->f->tool_bar_window) |
1863 | && s->w == XWINDOW (s->f->tool_bar_window)) | |
b4ebbb12 | 1864 | r.y -= FRAME_INTERNAL_BORDER_WIDTH (s->f); |
fa3c6b4d KS |
1865 | } |
1866 | ||
1867 | r.y = WINDOW_TO_FRAME_PIXEL_Y (s->w, r.y); | |
1868 | ||
fa3c6b4d KS |
1869 | /* If drawing the cursor, don't let glyph draw outside its |
1870 | advertised boundaries. Cleartype does this under some circumstances. */ | |
1871 | if (s->hl == DRAW_CURSOR) | |
1872 | { | |
493fdc3c | 1873 | struct glyph *glyph = s->first_glyph; |
999f5a60 | 1874 | int height, max_y; |
493fdc3c | 1875 | |
fa3c6b4d KS |
1876 | if (s->x > r.x) |
1877 | { | |
1878 | r.width -= s->x - r.x; | |
1879 | r.x = s->x; | |
1880 | } | |
493fdc3c KS |
1881 | r.width = min (r.width, glyph->pixel_width); |
1882 | ||
999f5a60 KS |
1883 | /* If r.y is below window bottom, ensure that we still see a cursor. */ |
1884 | height = min (glyph->ascent + glyph->descent, | |
1885 | min (FRAME_LINE_HEIGHT (s->f), s->row->visible_height)); | |
1886 | max_y = window_text_bottom_y (s->w) - height; | |
1887 | max_y = WINDOW_TO_FRAME_PIXEL_Y (s->w, max_y); | |
1888 | if (s->ybase - glyph->ascent > max_y) | |
493fdc3c | 1889 | { |
999f5a60 KS |
1890 | r.y = max_y; |
1891 | r.height = height; | |
1892 | } | |
1893 | else | |
1894 | { | |
1895 | /* Don't draw cursor glyph taller than our actual glyph. */ | |
1896 | height = max (FRAME_LINE_HEIGHT (s->f), glyph->ascent + glyph->descent); | |
1897 | if (height < r.height) | |
1898 | { | |
1899 | max_y = r.y + r.height; | |
1900 | r.y = min (max_y, max (r.y, s->ybase + glyph->descent - height)); | |
1901 | r.height = min (max_y - r.y, height); | |
1902 | } | |
493fdc3c | 1903 | } |
fa3c6b4d | 1904 | } |
fa3c6b4d | 1905 | |
a66678fd YM |
1906 | if ((s->for_overlaps & OVERLAPS_BOTH) == 0 |
1907 | || (s->for_overlaps & OVERLAPS_BOTH) == OVERLAPS_BOTH && n == 1) | |
1908 | { | |
fa3c6b4d | 1909 | #ifdef CONVERT_FROM_XRECT |
a66678fd | 1910 | CONVERT_FROM_XRECT (r, *rects); |
fa3c6b4d | 1911 | #else |
a66678fd YM |
1912 | *rects = r; |
1913 | #endif | |
1914 | return 1; | |
1915 | } | |
1916 | else | |
1917 | { | |
1918 | /* If we are processing overlapping and allowed to return | |
1919 | multiple clipping rectangles, we exclude the row of the glyph | |
1920 | string from the clipping rectangle. This is to avoid drawing | |
1921 | the same text on the environment with anti-aliasing. */ | |
1922 | #ifdef CONVERT_FROM_XRECT | |
1923 | XRectangle rs[2]; | |
1924 | #else | |
1925 | XRectangle *rs = rects; | |
1926 | #endif | |
1927 | int i = 0, row_y = WINDOW_TO_FRAME_PIXEL_Y (s->w, s->row->y); | |
1928 | ||
1929 | if (s->for_overlaps & OVERLAPS_PRED) | |
1930 | { | |
1931 | rs[i] = r; | |
1932 | if (r.y + r.height > row_y) | |
1933 | if (r.y < row_y) | |
1934 | rs[i].height = row_y - r.y; | |
1935 | else | |
1936 | rs[i].height = 0; | |
1937 | i++; | |
1938 | } | |
1939 | if (s->for_overlaps & OVERLAPS_SUCC) | |
1940 | { | |
1941 | rs[i] = r; | |
1942 | if (r.y < row_y + s->row->visible_height) | |
1943 | if (r.y + r.height > row_y + s->row->visible_height) | |
1944 | { | |
1945 | rs[i].y = row_y + s->row->visible_height; | |
1946 | rs[i].height = r.y + r.height - rs[i].y; | |
1947 | } | |
1948 | else | |
1949 | rs[i].height = 0; | |
1950 | i++; | |
1951 | } | |
1952 | ||
1953 | n = i; | |
1954 | #ifdef CONVERT_FROM_XRECT | |
1955 | for (i = 0; i < n; i++) | |
1956 | CONVERT_FROM_XRECT (rs[i], rects[i]); | |
fd4c9408 | 1957 | #endif |
a66678fd YM |
1958 | return n; |
1959 | } | |
1960 | } | |
1961 | ||
1962 | /* EXPORT: | |
1963 | Return in *NR the clipping rectangle for glyph string S. */ | |
1964 | ||
1965 | void | |
1966 | get_glyph_string_clip_rect (s, nr) | |
1967 | struct glyph_string *s; | |
1968 | NativeRectangle *nr; | |
1969 | { | |
1970 | get_glyph_string_clip_rects (s, nr, 1); | |
fa3c6b4d KS |
1971 | } |
1972 | ||
2049265a KS |
1973 | |
1974 | /* EXPORT: | |
1975 | Return the position and height of the phys cursor in window W. | |
1976 | Set w->phys_cursor_width to width of phys cursor. | |
1977 | */ | |
1978 | ||
1979 | int | |
1980 | get_phys_cursor_geometry (w, row, glyph, heightp) | |
1981 | struct window *w; | |
1982 | struct glyph_row *row; | |
1983 | struct glyph *glyph; | |
1984 | int *heightp; | |
1985 | { | |
1986 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
b78ab259 | 1987 | int y, wd, h, h0, y0; |
2049265a KS |
1988 | |
1989 | /* Compute the width of the rectangle to draw. If on a stretch | |
1990 | glyph, and `x-stretch-block-cursor' is nil, don't draw a | |
1991 | rectangle as wide as the glyph, but use a canonical character | |
1992 | width instead. */ | |
1993 | wd = glyph->pixel_width - 1; | |
1994 | #ifdef HAVE_NTGUI | |
1995 | wd++; /* Why? */ | |
1996 | #endif | |
1997 | if (glyph->type == STRETCH_GLYPH | |
1998 | && !x_stretch_cursor_p) | |
1999 | wd = min (FRAME_COLUMN_WIDTH (f), wd); | |
2000 | w->phys_cursor_width = wd; | |
2001 | ||
2002 | y = w->phys_cursor.y + row->ascent - glyph->ascent; | |
2003 | ||
2004 | /* If y is below window bottom, ensure that we still see a cursor. */ | |
2005 | h0 = min (FRAME_LINE_HEIGHT (f), row->visible_height); | |
2006 | ||
2007 | h = max (h0, glyph->ascent + glyph->descent); | |
2008 | h0 = min (h0, glyph->ascent + glyph->descent); | |
2009 | ||
2010 | y0 = WINDOW_HEADER_LINE_HEIGHT (w); | |
2011 | if (y < y0) | |
2012 | { | |
2013 | h = max (h - (y0 - y) + 1, h0); | |
2014 | y = y0 - 1; | |
2015 | } | |
2016 | else | |
2017 | { | |
2018 | y0 = window_text_bottom_y (w) - h0; | |
2019 | if (y > y0) | |
2020 | { | |
2021 | h += y - y0; | |
2022 | y = y0; | |
2023 | } | |
2024 | } | |
2025 | ||
2026 | *heightp = h - 1; | |
2027 | return WINDOW_TO_FRAME_PIXEL_Y (w, y); | |
2028 | } | |
2029 | ||
984c107d KS |
2030 | /* |
2031 | * Remember which glyph the mouse is over. | |
2032 | */ | |
2033 | ||
2034 | void | |
2035 | remember_mouse_glyph (f, gx, gy, rect) | |
2036 | struct frame *f; | |
2037 | int gx, gy; | |
2038 | NativeRectangle *rect; | |
2039 | { | |
2040 | Lisp_Object window; | |
2041 | struct window *w; | |
2042 | struct glyph_row *r, *gr, *end_row; | |
2043 | enum window_part part; | |
2044 | enum glyph_row_area area; | |
2045 | int x, y, width, height; | |
2046 | ||
2047 | /* Try to determine frame pixel position and size of the glyph under | |
2048 | frame pixel coordinates X/Y on frame F. */ | |
2049 | ||
2050 | window = window_from_coordinates (f, gx, gy, &part, &x, &y, 0); | |
2051 | if (NILP (window)) | |
2052 | { | |
2053 | width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
2054 | height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
2055 | goto virtual_glyph; | |
2056 | } | |
2057 | ||
2058 | w = XWINDOW (window); | |
2059 | width = WINDOW_FRAME_COLUMN_WIDTH (w); | |
2060 | height = WINDOW_FRAME_LINE_HEIGHT (w); | |
2061 | ||
2062 | r = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
76d8f04c | 2063 | end_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); |
984c107d KS |
2064 | |
2065 | if (w->pseudo_window_p) | |
2066 | { | |
2067 | area = TEXT_AREA; | |
2068 | part = ON_MODE_LINE; /* Don't adjust margin. */ | |
2069 | goto text_glyph; | |
2070 | } | |
2071 | ||
2072 | switch (part) | |
2073 | { | |
2074 | case ON_LEFT_MARGIN: | |
2075 | area = LEFT_MARGIN_AREA; | |
2076 | goto text_glyph; | |
2077 | ||
2078 | case ON_RIGHT_MARGIN: | |
2079 | area = RIGHT_MARGIN_AREA; | |
2080 | goto text_glyph; | |
2081 | ||
984c107d | 2082 | case ON_HEADER_LINE: |
76d8f04c YM |
2083 | case ON_MODE_LINE: |
2084 | gr = (part == ON_HEADER_LINE | |
2085 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
2086 | : MATRIX_MODE_LINE_ROW (w->current_matrix)); | |
2087 | gy = gr->y; | |
2088 | area = TEXT_AREA; | |
2089 | goto text_glyph_row_found; | |
2090 | ||
2091 | case ON_TEXT: | |
984c107d KS |
2092 | area = TEXT_AREA; |
2093 | ||
2094 | text_glyph: | |
2095 | gr = 0; gy = 0; | |
76d8f04c | 2096 | for (; r <= end_row && r->enabled_p; ++r) |
984c107d KS |
2097 | if (r->y + r->height > y) |
2098 | { | |
2099 | gr = r; gy = r->y; | |
2100 | break; | |
2101 | } | |
2102 | ||
76d8f04c | 2103 | text_glyph_row_found: |
984c107d KS |
2104 | if (gr && gy <= y) |
2105 | { | |
2106 | struct glyph *g = gr->glyphs[area]; | |
2107 | struct glyph *end = g + gr->used[area]; | |
2108 | ||
2109 | height = gr->height; | |
2110 | for (gx = gr->x; g < end; gx += g->pixel_width, ++g) | |
2111 | if (gx + g->pixel_width > x) | |
2112 | break; | |
2113 | ||
2114 | if (g < end) | |
8460eb1e KS |
2115 | { |
2116 | if (g->type == IMAGE_GLYPH) | |
2117 | { | |
2118 | /* Don't remember when mouse is over image, as | |
2119 | image may have hot-spots. */ | |
2120 | STORE_NATIVE_RECT (*rect, 0, 0, 0, 0); | |
2121 | return; | |
2122 | } | |
2123 | width = g->pixel_width; | |
2124 | } | |
984c107d KS |
2125 | else |
2126 | { | |
2127 | /* Use nominal char spacing at end of line. */ | |
2128 | x -= gx; | |
2129 | gx += (x / width) * width; | |
2130 | } | |
2131 | ||
2132 | if (part != ON_MODE_LINE && part != ON_HEADER_LINE) | |
2133 | gx += window_box_left_offset (w, area); | |
2134 | } | |
2135 | else | |
2136 | { | |
2137 | /* Use nominal line height at end of window. */ | |
2138 | gx = (x / width) * width; | |
2139 | y -= gy; | |
2140 | gy += (y / height) * height; | |
2141 | } | |
2142 | break; | |
2143 | ||
2144 | case ON_LEFT_FRINGE: | |
2145 | gx = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
2146 | ? WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (w) | |
2147 | : window_box_right_offset (w, LEFT_MARGIN_AREA)); | |
2148 | width = WINDOW_LEFT_FRINGE_WIDTH (w); | |
2149 | goto row_glyph; | |
2150 | ||
2151 | case ON_RIGHT_FRINGE: | |
2152 | gx = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
2153 | ? window_box_right_offset (w, RIGHT_MARGIN_AREA) | |
2154 | : window_box_right_offset (w, TEXT_AREA)); | |
2155 | width = WINDOW_RIGHT_FRINGE_WIDTH (w); | |
2156 | goto row_glyph; | |
2157 | ||
2158 | case ON_SCROLL_BAR: | |
2159 | gx = (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w) | |
2160 | ? 0 | |
2161 | : (window_box_right_offset (w, RIGHT_MARGIN_AREA) | |
2162 | + (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
2163 | ? WINDOW_RIGHT_FRINGE_WIDTH (w) | |
2164 | : 0))); | |
2165 | width = WINDOW_SCROLL_BAR_AREA_WIDTH (w); | |
2166 | ||
2167 | row_glyph: | |
2168 | gr = 0, gy = 0; | |
76d8f04c | 2169 | for (; r <= end_row && r->enabled_p; ++r) |
984c107d KS |
2170 | if (r->y + r->height > y) |
2171 | { | |
2172 | gr = r; gy = r->y; | |
2173 | break; | |
2174 | } | |
2175 | ||
2176 | if (gr && gy <= y) | |
2177 | height = gr->height; | |
2178 | else | |
2179 | { | |
2180 | /* Use nominal line height at end of window. */ | |
2181 | y -= gy; | |
2182 | gy += (y / height) * height; | |
2183 | } | |
2184 | break; | |
2185 | ||
2186 | default: | |
2187 | ; | |
2188 | virtual_glyph: | |
2189 | /* If there is no glyph under the mouse, then we divide the screen | |
2190 | into a grid of the smallest glyph in the frame, and use that | |
2191 | as our "glyph". */ | |
2192 | ||
2193 | /* Arrange for the division in FRAME_PIXEL_X_TO_COL etc. to | |
2194 | round down even for negative values. */ | |
2195 | if (gx < 0) | |
2196 | gx -= width - 1; | |
2197 | if (gy < 0) | |
2198 | gy -= height - 1; | |
2199 | ||
2200 | gx = (gx / width) * width; | |
2201 | gy = (gy / height) * height; | |
2202 | ||
2203 | goto store_rect; | |
2204 | } | |
2205 | ||
2206 | gx += WINDOW_LEFT_EDGE_X (w); | |
2207 | gy += WINDOW_TOP_EDGE_Y (w); | |
2208 | ||
2209 | store_rect: | |
2210 | STORE_NATIVE_RECT (*rect, gx, gy, width, height); | |
2211 | ||
2212 | /* Visible feedback for debugging. */ | |
2213 | #if 0 | |
2214 | #if HAVE_X_WINDOWS | |
2215 | XDrawRectangle (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
2216 | f->output_data.x->normal_gc, | |
2217 | gx, gy, width, height); | |
2218 | #endif | |
2219 | #endif | |
2220 | } | |
2221 | ||
2049265a | 2222 | |
fa3c6b4d | 2223 | #endif /* HAVE_WINDOW_SYSTEM */ |
9c74a0dd | 2224 | |
5f5c8ee5 GM |
2225 | \f |
2226 | /*********************************************************************** | |
2227 | Lisp form evaluation | |
2228 | ***********************************************************************/ | |
2229 | ||
116d6f5c | 2230 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
2231 | |
2232 | static Lisp_Object | |
116d6f5c | 2233 | safe_eval_handler (arg) |
5f5c8ee5 GM |
2234 | Lisp_Object arg; |
2235 | { | |
0dbf9fd2 | 2236 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
2237 | return Qnil; |
2238 | } | |
2239 | ||
2240 | ||
2241 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 2242 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 2243 | |
71e5b1b8 | 2244 | Lisp_Object |
116d6f5c | 2245 | safe_eval (sexpr) |
5f5c8ee5 GM |
2246 | Lisp_Object sexpr; |
2247 | { | |
5f5c8ee5 | 2248 | Lisp_Object val; |
2311178e | 2249 | |
30a3f61c GM |
2250 | if (inhibit_eval_during_redisplay) |
2251 | val = Qnil; | |
2252 | else | |
2253 | { | |
331379bf | 2254 | int count = SPECPDL_INDEX (); |
30a3f61c | 2255 | struct gcpro gcpro1; |
0d8b31c0 | 2256 | |
30a3f61c GM |
2257 | GCPRO1 (sexpr); |
2258 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
2259 | /* Use Qt to ensure debugger does not run, |
2260 | so there is no possibility of wanting to redisplay. */ | |
2261 | val = internal_condition_case_1 (Feval, sexpr, Qt, | |
30a3f61c GM |
2262 | safe_eval_handler); |
2263 | UNGCPRO; | |
2264 | val = unbind_to (count, val); | |
2265 | } | |
2311178e | 2266 | |
30a3f61c | 2267 | return val; |
0d8b31c0 GM |
2268 | } |
2269 | ||
2270 | ||
2271 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
2272 | Return the result, or nil if something went wrong. Prevent |
2273 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
2274 | |
2275 | Lisp_Object | |
116d6f5c | 2276 | safe_call (nargs, args) |
0d8b31c0 GM |
2277 | int nargs; |
2278 | Lisp_Object *args; | |
2279 | { | |
0d8b31c0 | 2280 | Lisp_Object val; |
2311178e | 2281 | |
30a3f61c GM |
2282 | if (inhibit_eval_during_redisplay) |
2283 | val = Qnil; | |
2284 | else | |
2285 | { | |
331379bf | 2286 | int count = SPECPDL_INDEX (); |
30a3f61c | 2287 | struct gcpro gcpro1; |
0d8b31c0 | 2288 | |
30a3f61c GM |
2289 | GCPRO1 (args[0]); |
2290 | gcpro1.nvars = nargs; | |
2291 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
2292 | /* Use Qt to ensure debugger does not run, |
2293 | so there is no possibility of wanting to redisplay. */ | |
2294 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qt, | |
30a3f61c GM |
2295 | safe_eval_handler); |
2296 | UNGCPRO; | |
2297 | val = unbind_to (count, val); | |
2298 | } | |
2299 | ||
2300 | return val; | |
5f5c8ee5 GM |
2301 | } |
2302 | ||
2303 | ||
116d6f5c GM |
2304 | /* Call function FN with one argument ARG. |
2305 | Return the result, or nil if something went wrong. */ | |
2306 | ||
2307 | Lisp_Object | |
2308 | safe_call1 (fn, arg) | |
2309 | Lisp_Object fn, arg; | |
2310 | { | |
2311 | Lisp_Object args[2]; | |
2312 | args[0] = fn; | |
2313 | args[1] = arg; | |
2314 | return safe_call (2, args); | |
2315 | } | |
2316 | ||
2317 | ||
5f5c8ee5 GM |
2318 | \f |
2319 | /*********************************************************************** | |
2320 | Debugging | |
2321 | ***********************************************************************/ | |
2322 | ||
2323 | #if 0 | |
2324 | ||
2325 | /* Define CHECK_IT to perform sanity checks on iterators. | |
2326 | This is for debugging. It is too slow to do unconditionally. */ | |
2327 | ||
2328 | static void | |
2329 | check_it (it) | |
2330 | struct it *it; | |
2331 | { | |
a6f82cc4 | 2332 | if (it->method == GET_FROM_STRING) |
a2889657 | 2333 | { |
5f5c8ee5 GM |
2334 | xassert (STRINGP (it->string)); |
2335 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
2336 | } | |
7d8a0b55 | 2337 | else |
5f5c8ee5 | 2338 | { |
7d8a0b55 | 2339 | xassert (IT_STRING_CHARPOS (*it) < 0); |
a6f82cc4 | 2340 | if (it->method == GET_FROM_BUFFER) |
7d8a0b55 MB |
2341 | { |
2342 | /* Check that character and byte positions agree. */ | |
2343 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
2344 | } | |
5f5c8ee5 | 2345 | } |
73af359d | 2346 | |
5f5c8ee5 GM |
2347 | if (it->dpvec) |
2348 | xassert (it->current.dpvec_index >= 0); | |
2349 | else | |
2350 | xassert (it->current.dpvec_index < 0); | |
2351 | } | |
1f40cad2 | 2352 | |
5f5c8ee5 GM |
2353 | #define CHECK_IT(IT) check_it ((IT)) |
2354 | ||
2355 | #else /* not 0 */ | |
2356 | ||
2357 | #define CHECK_IT(IT) (void) 0 | |
2358 | ||
2359 | #endif /* not 0 */ | |
2360 | ||
2361 | ||
2362 | #if GLYPH_DEBUG | |
2363 | ||
2364 | /* Check that the window end of window W is what we expect it | |
2365 | to be---the last row in the current matrix displaying text. */ | |
2366 | ||
2367 | static void | |
2368 | check_window_end (w) | |
2369 | struct window *w; | |
2370 | { | |
2371 | if (!MINI_WINDOW_P (w) | |
2372 | && !NILP (w->window_end_valid)) | |
2373 | { | |
2374 | struct glyph_row *row; | |
2375 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
2376 | XFASTINT (w->window_end_vpos)), | |
2377 | !row->enabled_p | |
2378 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
2379 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
2380 | } | |
2381 | } | |
2382 | ||
2383 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
2384 | ||
2385 | #else /* not GLYPH_DEBUG */ | |
2386 | ||
2387 | #define CHECK_WINDOW_END(W) (void) 0 | |
2388 | ||
2389 | #endif /* not GLYPH_DEBUG */ | |
2390 | ||
2391 | ||
2392 | \f | |
2393 | /*********************************************************************** | |
2394 | Iterator initialization | |
2395 | ***********************************************************************/ | |
2396 | ||
2397 | /* Initialize IT for displaying current_buffer in window W, starting | |
2398 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
2399 | position is specified which is useful when the iterator is assigned | |
2400 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 2401 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
2402 | |
2403 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
2404 | will produce glyphs in that row. | |
2405 | ||
2406 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
96d2320f KS |
2407 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID, |
2408 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID for displaying | |
2409 | mode lines, or TOOL_BAR_FACE_ID for displaying the tool-bar. | |
2311178e | 2410 | |
96d2320f KS |
2411 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID, |
2412 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID, the iterator | |
2413 | will be initialized to use the corresponding mode line glyph row of | |
2414 | the desired matrix of W. */ | |
5f5c8ee5 GM |
2415 | |
2416 | void | |
2417 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
2418 | struct it *it; | |
2419 | struct window *w; | |
2420 | int charpos, bytepos; | |
2421 | struct glyph_row *row; | |
2422 | enum face_id base_face_id; | |
2423 | { | |
2424 | int highlight_region_p; | |
5f5c8ee5 GM |
2425 | |
2426 | /* Some precondition checks. */ | |
2427 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
2428 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
2429 | && charpos <= ZV)); | |
5f5c8ee5 GM |
2430 | |
2431 | /* If face attributes have been changed since the last redisplay, | |
2432 | free realized faces now because they depend on face definitions | |
7d0393cf | 2433 | that might have changed. Don't free faces while there might be |
1987b083 | 2434 | desired matrices pending which reference these faces. */ |
26683087 | 2435 | if (face_change_count && !inhibit_free_realized_faces) |
5f5c8ee5 GM |
2436 | { |
2437 | face_change_count = 0; | |
2438 | free_all_realized_faces (Qnil); | |
2439 | } | |
2440 | ||
2441 | /* Use one of the mode line rows of W's desired matrix if | |
2442 | appropriate. */ | |
2443 | if (row == NULL) | |
2444 | { | |
96d2320f KS |
2445 | if (base_face_id == MODE_LINE_FACE_ID |
2446 | || base_face_id == MODE_LINE_INACTIVE_FACE_ID) | |
5f5c8ee5 | 2447 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); |
045dee35 GM |
2448 | else if (base_face_id == HEADER_LINE_FACE_ID) |
2449 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 | 2450 | } |
2311178e | 2451 | |
5f5c8ee5 GM |
2452 | /* Clear IT. */ |
2453 | bzero (it, sizeof *it); | |
2454 | it->current.overlay_string_index = -1; | |
2455 | it->current.dpvec_index = -1; | |
5f5c8ee5 | 2456 | it->base_face_id = base_face_id; |
7d8a0b55 MB |
2457 | it->string = Qnil; |
2458 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
5f5c8ee5 GM |
2459 | |
2460 | /* The window in which we iterate over current_buffer: */ | |
2461 | XSETWINDOW (it->window, w); | |
2462 | it->w = w; | |
2463 | it->f = XFRAME (w->frame); | |
2464 | ||
d475bcb8 GM |
2465 | /* Extra space between lines (on window systems only). */ |
2466 | if (base_face_id == DEFAULT_FACE_ID | |
2467 | && FRAME_WINDOW_P (it->f)) | |
2468 | { | |
2469 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
2470 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
a9e5c932 KS |
2471 | else if (FLOATP (current_buffer->extra_line_spacing)) |
2472 | it->extra_line_spacing = (XFLOAT_DATA (current_buffer->extra_line_spacing) | |
2473 | * FRAME_LINE_HEIGHT (it->f)); | |
d475bcb8 GM |
2474 | else if (it->f->extra_line_spacing > 0) |
2475 | it->extra_line_spacing = it->f->extra_line_spacing; | |
546f98b8 | 2476 | it->max_extra_line_spacing = 0; |
d475bcb8 GM |
2477 | } |
2478 | ||
5f5c8ee5 | 2479 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
2480 | attribute changes of named faces, recompute them. When running |
2481 | in batch mode, the face cache of Vterminal_frame is null. If | |
2482 | we happen to get called, make a dummy face cache. */ | |
a24d4cb2 | 2483 | if (noninteractive && FRAME_FACE_CACHE (it->f) == NULL) |
62be9979 | 2484 | init_frame_faces (it->f); |
5f5c8ee5 GM |
2485 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
2486 | recompute_basic_faces (it->f); | |
2487 | ||
e893970b KS |
2488 | /* Current value of the `slice', `space-width', and 'height' properties. */ |
2489 | it->slice.x = it->slice.y = it->slice.width = it->slice.height = Qnil; | |
5f5c8ee5 GM |
2490 | it->space_width = Qnil; |
2491 | it->font_height = Qnil; | |
a9e5c932 | 2492 | it->override_ascent = -1; |
2311178e | 2493 | |
5f5c8ee5 GM |
2494 | /* Are control characters displayed as `^C'? */ |
2495 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
2496 | ||
2497 | /* -1 means everything between a CR and the following line end | |
2498 | is invisible. >0 means lines indented more than this value are | |
2499 | invisible. */ | |
2500 | it->selective = (INTEGERP (current_buffer->selective_display) | |
2501 | ? XFASTINT (current_buffer->selective_display) | |
2311178e | 2502 | : (!NILP (current_buffer->selective_display) |
5f5c8ee5 GM |
2503 | ? -1 : 0)); |
2504 | it->selective_display_ellipsis_p | |
2505 | = !NILP (current_buffer->selective_display_ellipses); | |
2506 | ||
2507 | /* Display table to use. */ | |
2508 | it->dp = window_display_table (w); | |
2509 | ||
2510 | /* Are multibyte characters enabled in current_buffer? */ | |
2511 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
2512 | ||
2513 | /* Non-zero if we should highlight the region. */ | |
2514 | highlight_region_p | |
3ebf0ea9 | 2515 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
2516 | && !NILP (current_buffer->mark_active) |
2517 | && XMARKER (current_buffer->mark)->buffer != 0); | |
2518 | ||
2519 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
2520 | start and end of a visible region in window IT->w. Set both to | |
2521 | -1 to indicate no region. */ | |
2522 | if (highlight_region_p | |
2523 | /* Maybe highlight only in selected window. */ | |
2311178e | 2524 | && (/* Either show region everywhere. */ |
5f5c8ee5 GM |
2525 | highlight_nonselected_windows |
2526 | /* Or show region in the selected window. */ | |
2527 | || w == XWINDOW (selected_window) | |
2528 | /* Or show the region if we are in the mini-buffer and W is | |
2529 | the window the mini-buffer refers to. */ | |
2530 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
5705966b KS |
2531 | && WINDOWP (minibuf_selected_window) |
2532 | && w == XWINDOW (minibuf_selected_window)))) | |
5f5c8ee5 GM |
2533 | { |
2534 | int charpos = marker_position (current_buffer->mark); | |
2535 | it->region_beg_charpos = min (PT, charpos); | |
2536 | it->region_end_charpos = max (PT, charpos); | |
2537 | } | |
2538 | else | |
2539 | it->region_beg_charpos = it->region_end_charpos = -1; | |
2540 | ||
2541 | /* Get the position at which the redisplay_end_trigger hook should | |
2542 | be run, if it is to be run at all. */ | |
2543 | if (MARKERP (w->redisplay_end_trigger) | |
2544 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
2545 | it->redisplay_end_trigger_charpos | |
2546 | = marker_position (w->redisplay_end_trigger); | |
2547 | else if (INTEGERP (w->redisplay_end_trigger)) | |
2548 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
2549 | ||
2550 | /* Correct bogus values of tab_width. */ | |
2551 | it->tab_width = XINT (current_buffer->tab_width); | |
2552 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
2553 | it->tab_width = 8; | |
2554 | ||
2555 | /* Are lines in the display truncated? */ | |
2556 | it->truncate_lines_p | |
2557 | = (base_face_id != DEFAULT_FACE_ID | |
2558 | || XINT (it->w->hscroll) | |
2559 | || (truncate_partial_width_windows | |
2560 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
2561 | || !NILP (current_buffer->truncate_lines)); | |
2562 | ||
2563 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 2564 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
2565 | frames. */ |
2566 | if (!FRAME_WINDOW_P (it->f)) | |
2567 | { | |
2568 | if (it->truncate_lines_p) | |
2569 | { | |
2570 | /* We will need the truncation glyph. */ | |
2571 | xassert (it->glyph_row == NULL); | |
2572 | produce_special_glyphs (it, IT_TRUNCATION); | |
2573 | it->truncation_pixel_width = it->pixel_width; | |
2574 | } | |
2575 | else | |
2576 | { | |
2577 | /* We will need the continuation glyph. */ | |
2578 | xassert (it->glyph_row == NULL); | |
2579 | produce_special_glyphs (it, IT_CONTINUATION); | |
2580 | it->continuation_pixel_width = it->pixel_width; | |
2581 | } | |
2582 | ||
153c2160 | 2583 | /* Reset these values to zero because the produce_special_glyphs |
5f5c8ee5 GM |
2584 | above has changed them. */ |
2585 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 2586 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
2587 | } |
2588 | ||
2589 | /* Set this after getting the dimensions of truncation and | |
2590 | continuation glyphs, so that we don't produce glyphs when calling | |
2591 | produce_special_glyphs, above. */ | |
2592 | it->glyph_row = row; | |
2593 | it->area = TEXT_AREA; | |
2594 | ||
2595 | /* Get the dimensions of the display area. The display area | |
2596 | consists of the visible window area plus a horizontally scrolled | |
2597 | part to the left of the window. All x-values are relative to the | |
2598 | start of this total display area. */ | |
2599 | if (base_face_id != DEFAULT_FACE_ID) | |
2600 | { | |
2601 | /* Mode lines, menu bar in terminal frames. */ | |
2602 | it->first_visible_x = 0; | |
da8b7f4f | 2603 | it->last_visible_x = WINDOW_TOTAL_WIDTH (w); |
5f5c8ee5 GM |
2604 | } |
2605 | else | |
2606 | { | |
2607 | it->first_visible_x | |
da8b7f4f | 2608 | = XFASTINT (it->w->hscroll) * FRAME_COLUMN_WIDTH (it->f); |
5f5c8ee5 GM |
2609 | it->last_visible_x = (it->first_visible_x |
2610 | + window_box_width (w, TEXT_AREA)); | |
2611 | ||
2612 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
2613 | the right margin. Otherwise, leave room for the continuation | |
2614 | glyph(s). Truncation and continuation glyphs are not inserted | |
2615 | for window-based redisplay. */ | |
2616 | if (!FRAME_WINDOW_P (it->f)) | |
2617 | { | |
2618 | if (it->truncate_lines_p) | |
2619 | it->last_visible_x -= it->truncation_pixel_width; | |
2620 | else | |
2621 | it->last_visible_x -= it->continuation_pixel_width; | |
2622 | } | |
2623 | ||
045dee35 | 2624 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
da8b7f4f | 2625 | it->current_y = WINDOW_HEADER_LINE_HEIGHT (w) + w->vscroll; |
5f5c8ee5 GM |
2626 | } |
2627 | ||
2628 | /* Leave room for a border glyph. */ | |
2629 | if (!FRAME_WINDOW_P (it->f) | |
2630 | && !WINDOW_RIGHTMOST_P (it->w)) | |
2631 | it->last_visible_x -= 1; | |
2632 | ||
2633 | it->last_visible_y = window_text_bottom_y (w); | |
2634 | ||
2635 | /* For mode lines and alike, arrange for the first glyph having a | |
2636 | left box line if the face specifies a box. */ | |
2637 | if (base_face_id != DEFAULT_FACE_ID) | |
2638 | { | |
2639 | struct face *face; | |
2311178e | 2640 | |
5f5c8ee5 GM |
2641 | it->face_id = base_face_id; |
2642 | ||
2643 | /* If we have a boxed mode line, make the first character appear | |
2644 | with a left box line. */ | |
2645 | face = FACE_FROM_ID (it->f, base_face_id); | |
2646 | if (face->box != FACE_NO_BOX) | |
2647 | it->start_of_box_run_p = 1; | |
2648 | } | |
2649 | ||
2650 | /* If a buffer position was specified, set the iterator there, | |
2651 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 2652 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
2653 | { |
2654 | it->end_charpos = ZV; | |
2655 | it->face_id = -1; | |
2656 | IT_CHARPOS (*it) = charpos; | |
2311178e | 2657 | |
5f5c8ee5 | 2658 | /* Compute byte position if not specified. */ |
3ebf0ea9 | 2659 | if (bytepos < charpos) |
5f5c8ee5 GM |
2660 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
2661 | else | |
2662 | IT_BYTEPOS (*it) = bytepos; | |
2663 | ||
29b3ea63 KS |
2664 | it->start = it->current; |
2665 | ||
5f5c8ee5 GM |
2666 | /* Compute faces etc. */ |
2667 | reseat (it, it->current.pos, 1); | |
2668 | } | |
2311178e | 2669 | |
5f5c8ee5 GM |
2670 | CHECK_IT (it); |
2671 | } | |
2672 | ||
2673 | ||
2674 | /* Initialize IT for the display of window W with window start POS. */ | |
2675 | ||
2676 | void | |
2677 | start_display (it, w, pos) | |
2678 | struct it *it; | |
2679 | struct window *w; | |
2680 | struct text_pos pos; | |
2681 | { | |
5f5c8ee5 | 2682 | struct glyph_row *row; |
045dee35 | 2683 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
2684 | |
2685 | row = w->desired_matrix->rows + first_vpos; | |
2686 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
3ccb8bcf | 2687 | it->first_vpos = first_vpos; |
17fdcfc8 | 2688 | |
e0e9a80e KS |
2689 | /* Don't reseat to previous visible line start if current start |
2690 | position is in a string or image. */ | |
2691 | if (it->method == GET_FROM_BUFFER && !it->truncate_lines_p) | |
5f5c8ee5 | 2692 | { |
17fdcfc8 GM |
2693 | int start_at_line_beg_p; |
2694 | int first_y = it->current_y; | |
2311178e | 2695 | |
17fdcfc8 GM |
2696 | /* If window start is not at a line start, skip forward to POS to |
2697 | get the correct continuation lines width. */ | |
2698 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
2699 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
2700 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 2701 | { |
0e47bbf7 RS |
2702 | int new_x; |
2703 | ||
17fdcfc8 GM |
2704 | reseat_at_previous_visible_line_start (it); |
2705 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
2706 | ||
0e47bbf7 RS |
2707 | new_x = it->current_x + it->pixel_width; |
2708 | ||
17fdcfc8 GM |
2709 | /* If lines are continued, this line may end in the middle |
2710 | of a multi-glyph character (e.g. a control character | |
2711 | displayed as \003, or in the middle of an overlay | |
2712 | string). In this case move_it_to above will not have | |
2713 | taken us to the start of the continuation line but to the | |
2714 | end of the continued line. */ | |
0e47bbf7 RS |
2715 | if (it->current_x > 0 |
2716 | && !it->truncate_lines_p /* Lines are continued. */ | |
2717 | && (/* And glyph doesn't fit on the line. */ | |
2718 | new_x > it->last_visible_x | |
2719 | /* Or it fits exactly and we're on a window | |
2720 | system frame. */ | |
2721 | || (new_x == it->last_visible_x | |
2722 | && FRAME_WINDOW_P (it->f)))) | |
5f5c8ee5 | 2723 | { |
b28cb6ed GM |
2724 | if (it->current.dpvec_index >= 0 |
2725 | || it->current.overlay_string_index >= 0) | |
2726 | { | |
cafafe0b | 2727 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
2728 | move_it_in_display_line_to (it, -1, -1, 0); |
2729 | } | |
2311178e | 2730 | |
b28cb6ed | 2731 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 2732 | } |
b28cb6ed GM |
2733 | |
2734 | /* We're starting a new display line, not affected by the | |
2735 | height of the continued line, so clear the appropriate | |
2736 | fields in the iterator structure. */ | |
2737 | it->max_ascent = it->max_descent = 0; | |
2738 | it->max_phys_ascent = it->max_phys_descent = 0; | |
2311178e | 2739 | |
17fdcfc8 GM |
2740 | it->current_y = first_y; |
2741 | it->vpos = 0; | |
2742 | it->current_x = it->hpos = 0; | |
2743 | } | |
5f5c8ee5 GM |
2744 | } |
2745 | ||
2746 | #if 0 /* Don't assert the following because start_display is sometimes | |
2747 | called intentionally with a window start that is not at a | |
2748 | line start. Please leave this code in as a comment. */ | |
2311178e | 2749 | |
5f5c8ee5 GM |
2750 | /* Window start should be on a line start, now. */ |
2751 | xassert (it->continuation_lines_width | |
2752 | || IT_CHARPOS (it) == BEGV | |
2753 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
2754 | #endif /* 0 */ | |
2755 | } | |
2756 | ||
2757 | ||
4bde0ebb GM |
2758 | /* Return 1 if POS is a position in ellipses displayed for invisible |
2759 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 2760 | |
4bde0ebb GM |
2761 | static int |
2762 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 2763 | struct display_pos *pos; |
4bde0ebb | 2764 | struct window *w; |
5f5c8ee5 | 2765 | { |
ac90c44f | 2766 | Lisp_Object prop, window; |
4bde0ebb GM |
2767 | int ellipses_p = 0; |
2768 | int charpos = CHARPOS (pos->pos); | |
2311178e | 2769 | |
ac90c44f GM |
2770 | /* If POS specifies a position in a display vector, this might |
2771 | be for an ellipsis displayed for invisible text. We won't | |
2772 | get the iterator set up for delivering that ellipsis unless | |
2773 | we make sure that it gets aware of the invisible text. */ | |
2774 | if (pos->dpvec_index >= 0 | |
2775 | && pos->overlay_string_index < 0 | |
2776 | && CHARPOS (pos->string_pos) < 0 | |
2777 | && charpos > BEGV | |
2778 | && (XSETWINDOW (window, w), | |
2779 | prop = Fget_char_property (make_number (charpos), | |
2780 | Qinvisible, window), | |
20fbd925 | 2781 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
2782 | { |
2783 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
2784 | window); | |
8580a4e3 | 2785 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
2786 | } |
2787 | ||
2788 | return ellipses_p; | |
2789 | } | |
2790 | ||
2791 | ||
2792 | /* Initialize IT for stepping through current_buffer in window W, | |
2793 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
2794 | vector/ control character translation position information. Value |
2795 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 2796 | |
47d57b22 | 2797 | static int |
4bde0ebb GM |
2798 | init_from_display_pos (it, w, pos) |
2799 | struct it *it; | |
2800 | struct window *w; | |
2801 | struct display_pos *pos; | |
2802 | { | |
2803 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 2804 | int i, overlay_strings_with_newlines = 0; |
2311178e | 2805 | |
4bde0ebb GM |
2806 | /* If POS specifies a position in a display vector, this might |
2807 | be for an ellipsis displayed for invisible text. We won't | |
2808 | get the iterator set up for delivering that ellipsis unless | |
2809 | we make sure that it gets aware of the invisible text. */ | |
2810 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
2811 | { | |
2812 | --charpos; | |
2813 | bytepos = 0; | |
ac90c44f | 2814 | } |
2311178e | 2815 | |
5f5c8ee5 GM |
2816 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
2817 | text, so we might end up at a position different from POS. This | |
2818 | is only a problem when POS is a row start after a newline and an | |
2819 | overlay starts there with an after-string, and the overlay has an | |
2820 | invisible property. Since we don't skip invisible text in | |
2821 | display_line and elsewhere immediately after consuming the | |
2822 | newline before the row start, such a POS will not be in a string, | |
2823 | but the call to init_iterator below will move us to the | |
2824 | after-string. */ | |
ac90c44f | 2825 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 2826 | |
fcd9b9d0 KS |
2827 | /* This only scans the current chunk -- it should scan all chunks. |
2828 | However, OVERLAY_STRING_CHUNK_SIZE has been increased from 3 in 21.1 | |
2829 | to 16 in 22.1 to make this a lesser problem. */ | |
2830 | for (i = 0; i < it->n_overlay_strings && i < OVERLAY_STRING_CHUNK_SIZE; ++i) | |
1e1e5daf | 2831 | { |
50f80c2f KR |
2832 | const char *s = SDATA (it->overlay_strings[i]); |
2833 | const char *e = s + SBYTES (it->overlay_strings[i]); | |
2311178e | 2834 | |
1e1e5daf GM |
2835 | while (s < e && *s != '\n') |
2836 | ++s; | |
2837 | ||
2838 | if (s < e) | |
2839 | { | |
2840 | overlay_strings_with_newlines = 1; | |
2841 | break; | |
2842 | } | |
2843 | } | |
47d57b22 | 2844 | |
75c5350a GM |
2845 | /* If position is within an overlay string, set up IT to the right |
2846 | overlay string. */ | |
5f5c8ee5 GM |
2847 | if (pos->overlay_string_index >= 0) |
2848 | { | |
2849 | int relative_index; | |
75c5350a GM |
2850 | |
2851 | /* If the first overlay string happens to have a `display' | |
2852 | property for an image, the iterator will be set up for that | |
2853 | image, and we have to undo that setup first before we can | |
2854 | correct the overlay string index. */ | |
a6f82cc4 | 2855 | if (it->method == GET_FROM_IMAGE) |
75c5350a | 2856 | pop_it (it); |
2311178e | 2857 | |
5f5c8ee5 GM |
2858 | /* We already have the first chunk of overlay strings in |
2859 | IT->overlay_strings. Load more until the one for | |
2860 | pos->overlay_string_index is in IT->overlay_strings. */ | |
2861 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
2862 | { | |
2863 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
2864 | it->current.overlay_string_index = 0; | |
2865 | while (n--) | |
2866 | { | |
5a08cbaf | 2867 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
2868 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
2869 | } | |
2870 | } | |
2311178e | 2871 | |
5f5c8ee5 GM |
2872 | it->current.overlay_string_index = pos->overlay_string_index; |
2873 | relative_index = (it->current.overlay_string_index | |
2874 | % OVERLAY_STRING_CHUNK_SIZE); | |
2875 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 2876 | xassert (STRINGP (it->string)); |
5f5c8ee5 | 2877 | it->current.string_pos = pos->string_pos; |
a6f82cc4 | 2878 | it->method = GET_FROM_STRING; |
5f5c8ee5 | 2879 | } |
2311178e | 2880 | |
1e1e5daf GM |
2881 | #if 0 /* This is bogus because POS not having an overlay string |
2882 | position does not mean it's after the string. Example: A | |
2883 | line starting with a before-string and initialization of IT | |
2884 | to the previous row's end position. */ | |
2be8f184 GM |
2885 | else if (it->current.overlay_string_index >= 0) |
2886 | { | |
2887 | /* If POS says we're already after an overlay string ending at | |
2888 | POS, make sure to pop the iterator because it will be in | |
2889 | front of that overlay string. When POS is ZV, we've thereby | |
2890 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
2891 | while (it->sp) |
2892 | pop_it (it); | |
2be8f184 | 2893 | it->current.overlay_string_index = -1; |
a6f82cc4 | 2894 | it->method = GET_FROM_BUFFER; |
2be8f184 GM |
2895 | if (CHARPOS (pos->pos) == ZV) |
2896 | it->overlay_strings_at_end_processed_p = 1; | |
2897 | } | |
1e1e5daf | 2898 | #endif /* 0 */ |
2311178e | 2899 | |
2be8f184 | 2900 | if (CHARPOS (pos->string_pos) >= 0) |
5f5c8ee5 GM |
2901 | { |
2902 | /* Recorded position is not in an overlay string, but in another | |
2903 | string. This can only be a string from a `display' property. | |
2904 | IT should already be filled with that string. */ | |
2905 | it->current.string_pos = pos->string_pos; | |
2906 | xassert (STRINGP (it->string)); | |
2907 | } | |
2908 | ||
ac90c44f GM |
2909 | /* Restore position in display vector translations, control |
2910 | character translations or ellipses. */ | |
5f5c8ee5 GM |
2911 | if (pos->dpvec_index >= 0) |
2912 | { | |
ac90c44f GM |
2913 | if (it->dpvec == NULL) |
2914 | get_next_display_element (it); | |
5f5c8ee5 GM |
2915 | xassert (it->dpvec && it->current.dpvec_index == 0); |
2916 | it->current.dpvec_index = pos->dpvec_index; | |
2917 | } | |
2311178e | 2918 | |
5f5c8ee5 | 2919 | CHECK_IT (it); |
47d57b22 | 2920 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
2921 | } |
2922 | ||
2923 | ||
2924 | /* Initialize IT for stepping through current_buffer in window W | |
2925 | starting at ROW->start. */ | |
2926 | ||
2927 | static void | |
2928 | init_to_row_start (it, w, row) | |
2929 | struct it *it; | |
2930 | struct window *w; | |
2931 | struct glyph_row *row; | |
2932 | { | |
2933 | init_from_display_pos (it, w, &row->start); | |
29b3ea63 | 2934 | it->start = row->start; |
5f5c8ee5 GM |
2935 | it->continuation_lines_width = row->continuation_lines_width; |
2936 | CHECK_IT (it); | |
2937 | } | |
2938 | ||
2311178e | 2939 | |
5f5c8ee5 | 2940 | /* Initialize IT for stepping through current_buffer in window W |
47d57b22 GM |
2941 | starting in the line following ROW, i.e. starting at ROW->end. |
2942 | Value is zero if there are overlay strings with newlines at ROW's | |
2943 | end position. */ | |
5f5c8ee5 | 2944 | |
47d57b22 | 2945 | static int |
5f5c8ee5 GM |
2946 | init_to_row_end (it, w, row) |
2947 | struct it *it; | |
2948 | struct window *w; | |
2949 | struct glyph_row *row; | |
2950 | { | |
47d57b22 | 2951 | int success = 0; |
2311178e | 2952 | |
47d57b22 GM |
2953 | if (init_from_display_pos (it, w, &row->end)) |
2954 | { | |
2955 | if (row->continued_p) | |
2956 | it->continuation_lines_width | |
2957 | = row->continuation_lines_width + row->pixel_width; | |
2958 | CHECK_IT (it); | |
2959 | success = 1; | |
2960 | } | |
2311178e | 2961 | |
47d57b22 | 2962 | return success; |
5f5c8ee5 GM |
2963 | } |
2964 | ||
2965 | ||
2966 | ||
2967 | \f | |
2968 | /*********************************************************************** | |
2969 | Text properties | |
2970 | ***********************************************************************/ | |
2971 | ||
2972 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
2973 | overlay changes. Set IT->stop_charpos to the next position where | |
2974 | to stop. */ | |
2975 | ||
2976 | static void | |
2977 | handle_stop (it) | |
2978 | struct it *it; | |
2979 | { | |
2980 | enum prop_handled handled; | |
310316cf | 2981 | int handle_overlay_change_p; |
5f5c8ee5 GM |
2982 | struct props *p; |
2983 | ||
2984 | it->dpvec = NULL; | |
2985 | it->current.dpvec_index = -1; | |
310316cf KS |
2986 | handle_overlay_change_p = !it->ignore_overlay_strings_at_pos_p; |
2987 | it->ignore_overlay_strings_at_pos_p = 0; | |
5f5c8ee5 | 2988 | |
62af9c24 KS |
2989 | /* Use face of preceding text for ellipsis (if invisible) */ |
2990 | if (it->selective_display_ellipsis_p) | |
2991 | it->saved_face_id = it->face_id; | |
2992 | ||
5f5c8ee5 GM |
2993 | do |
2994 | { | |
2995 | handled = HANDLED_NORMALLY; | |
2311178e | 2996 | |
5f5c8ee5 GM |
2997 | /* Call text property handlers. */ |
2998 | for (p = it_props; p->handler; ++p) | |
2999 | { | |
3000 | handled = p->handler (it); | |
2970b9be | 3001 | |
5f5c8ee5 GM |
3002 | if (handled == HANDLED_RECOMPUTE_PROPS) |
3003 | break; | |
3004 | else if (handled == HANDLED_RETURN) | |
3005 | return; | |
3006 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
3007 | handle_overlay_change_p = 0; | |
3008 | } | |
3009 | ||
3010 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
3011 | { | |
3012 | /* Don't check for overlay strings below when set to deliver | |
3013 | characters from a display vector. */ | |
a6f82cc4 | 3014 | if (it->method == GET_FROM_DISPLAY_VECTOR) |
5f5c8ee5 GM |
3015 | handle_overlay_change_p = 0; |
3016 | ||
3017 | /* Handle overlay changes. */ | |
3018 | if (handle_overlay_change_p) | |
3019 | handled = handle_overlay_change (it); | |
2311178e | 3020 | |
5f5c8ee5 GM |
3021 | /* Determine where to stop next. */ |
3022 | if (handled == HANDLED_NORMALLY) | |
3023 | compute_stop_pos (it); | |
3024 | } | |
3025 | } | |
3026 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
3027 | } | |
3028 | ||
3029 | ||
3030 | /* Compute IT->stop_charpos from text property and overlay change | |
3031 | information for IT's current position. */ | |
3032 | ||
3033 | static void | |
3034 | compute_stop_pos (it) | |
3035 | struct it *it; | |
3036 | { | |
3037 | register INTERVAL iv, next_iv; | |
3038 | Lisp_Object object, limit, position; | |
3039 | ||
3040 | /* If nowhere else, stop at the end. */ | |
3041 | it->stop_charpos = it->end_charpos; | |
2311178e | 3042 | |
5f5c8ee5 GM |
3043 | if (STRINGP (it->string)) |
3044 | { | |
3045 | /* Strings are usually short, so don't limit the search for | |
3046 | properties. */ | |
3047 | object = it->string; | |
3048 | limit = Qnil; | |
ac90c44f | 3049 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
3050 | } |
3051 | else | |
3052 | { | |
3053 | int charpos; | |
3054 | ||
3055 | /* If next overlay change is in front of the current stop pos | |
3056 | (which is IT->end_charpos), stop there. Note: value of | |
3057 | next_overlay_change is point-max if no overlay change | |
3058 | follows. */ | |
3059 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
3060 | if (charpos < it->stop_charpos) | |
3061 | it->stop_charpos = charpos; | |
3062 | ||
3063 | /* If showing the region, we have to stop at the region | |
3064 | start or end because the face might change there. */ | |
3065 | if (it->region_beg_charpos > 0) | |
3066 | { | |
3067 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
3068 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
3069 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
3070 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
3071 | } | |
2311178e | 3072 | |
5f5c8ee5 GM |
3073 | /* Set up variables for computing the stop position from text |
3074 | property changes. */ | |
3075 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
3076 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
3077 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
3078 | |
3079 | } | |
3080 | ||
3081 | /* Get the interval containing IT's position. Value is a null | |
3082 | interval if there isn't such an interval. */ | |
3083 | iv = validate_interval_range (object, &position, &position, 0); | |
3084 | if (!NULL_INTERVAL_P (iv)) | |
3085 | { | |
3086 | Lisp_Object values_here[LAST_PROP_IDX]; | |
3087 | struct props *p; | |
3088 | ||
3089 | /* Get properties here. */ | |
3090 | for (p = it_props; p->handler; ++p) | |
3091 | values_here[p->idx] = textget (iv->plist, *p->name); | |
3092 | ||
3093 | /* Look for an interval following iv that has different | |
3094 | properties. */ | |
3095 | for (next_iv = next_interval (iv); | |
3096 | (!NULL_INTERVAL_P (next_iv) | |
3097 | && (NILP (limit) | |
3098 | || XFASTINT (limit) > next_iv->position)); | |
3099 | next_iv = next_interval (next_iv)) | |
3100 | { | |
3101 | for (p = it_props; p->handler; ++p) | |
3102 | { | |
3103 | Lisp_Object new_value; | |
3104 | ||
3105 | new_value = textget (next_iv->plist, *p->name); | |
3106 | if (!EQ (values_here[p->idx], new_value)) | |
3107 | break; | |
3108 | } | |
2311178e | 3109 | |
5f5c8ee5 GM |
3110 | if (p->handler) |
3111 | break; | |
3112 | } | |
3113 | ||
3114 | if (!NULL_INTERVAL_P (next_iv)) | |
3115 | { | |
3116 | if (INTEGERP (limit) | |
3117 | && next_iv->position >= XFASTINT (limit)) | |
3118 | /* No text property change up to limit. */ | |
3119 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
3120 | else | |
3121 | /* Text properties change in next_iv. */ | |
3122 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
3123 | } | |
3124 | } | |
3125 | ||
3126 | xassert (STRINGP (it->string) | |
3127 | || (it->stop_charpos >= BEGV | |
3128 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
3129 | } | |
3130 | ||
3131 | ||
3132 | /* Return the position of the next overlay change after POS in | |
3133 | current_buffer. Value is point-max if no overlay change | |
3134 | follows. This is like `next-overlay-change' but doesn't use | |
3135 | xmalloc. */ | |
3136 | ||
3137 | static int | |
3138 | next_overlay_change (pos) | |
3139 | int pos; | |
3140 | { | |
3141 | int noverlays; | |
3142 | int endpos; | |
3143 | Lisp_Object *overlays; | |
5f5c8ee5 GM |
3144 | int i; |
3145 | ||
3146 | /* Get all overlays at the given position. */ | |
7994a991 | 3147 | GET_OVERLAYS_AT (pos, overlays, noverlays, &endpos, 1); |
5f5c8ee5 GM |
3148 | |
3149 | /* If any of these overlays ends before endpos, | |
3150 | use its ending point instead. */ | |
3151 | for (i = 0; i < noverlays; ++i) | |
3152 | { | |
3153 | Lisp_Object oend; | |
3154 | int oendpos; | |
3155 | ||
3156 | oend = OVERLAY_END (overlays[i]); | |
3157 | oendpos = OVERLAY_POSITION (oend); | |
3158 | endpos = min (endpos, oendpos); | |
3159 | } | |
3160 | ||
3161 | return endpos; | |
3162 | } | |
3163 | ||
3164 | ||
3165 | \f | |
3166 | /*********************************************************************** | |
3167 | Fontification | |
3168 | ***********************************************************************/ | |
3169 | ||
3170 | /* Handle changes in the `fontified' property of the current buffer by | |
3171 | calling hook functions from Qfontification_functions to fontify | |
3172 | regions of text. */ | |
3173 | ||
3174 | static enum prop_handled | |
3175 | handle_fontified_prop (it) | |
3176 | struct it *it; | |
3177 | { | |
3178 | Lisp_Object prop, pos; | |
3179 | enum prop_handled handled = HANDLED_NORMALLY; | |
3180 | ||
f5b8d5f2 RS |
3181 | if (!NILP (Vmemory_full)) |
3182 | return handled; | |
3183 | ||
5f5c8ee5 GM |
3184 | /* Get the value of the `fontified' property at IT's current buffer |
3185 | position. (The `fontified' property doesn't have a special | |
3186 | meaning in strings.) If the value is nil, call functions from | |
3187 | Qfontification_functions. */ | |
3188 | if (!STRINGP (it->string) | |
3189 | && it->s == NULL | |
3190 | && !NILP (Vfontification_functions) | |
085536c2 | 3191 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
3192 | && (pos = make_number (IT_CHARPOS (*it)), |
3193 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
3194 | NILP (prop))) | |
3195 | { | |
331379bf | 3196 | int count = SPECPDL_INDEX (); |
085536c2 GM |
3197 | Lisp_Object val; |
3198 | ||
3199 | val = Vfontification_functions; | |
3200 | specbind (Qfontification_functions, Qnil); | |
2311178e | 3201 | |
085536c2 | 3202 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
116d6f5c | 3203 | safe_call1 (val, pos); |
085536c2 GM |
3204 | else |
3205 | { | |
3206 | Lisp_Object globals, fn; | |
3207 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 3208 | |
085536c2 GM |
3209 | globals = Qnil; |
3210 | GCPRO2 (val, globals); | |
2311178e | 3211 | |
085536c2 GM |
3212 | for (; CONSP (val); val = XCDR (val)) |
3213 | { | |
3214 | fn = XCAR (val); | |
2311178e | 3215 | |
085536c2 GM |
3216 | if (EQ (fn, Qt)) |
3217 | { | |
3218 | /* A value of t indicates this hook has a local | |
3219 | binding; it means to run the global binding too. | |
3220 | In a global value, t should not occur. If it | |
3221 | does, we must ignore it to avoid an endless | |
3222 | loop. */ | |
3223 | for (globals = Fdefault_value (Qfontification_functions); | |
3224 | CONSP (globals); | |
3225 | globals = XCDR (globals)) | |
3226 | { | |
3227 | fn = XCAR (globals); | |
3228 | if (!EQ (fn, Qt)) | |
116d6f5c | 3229 | safe_call1 (fn, pos); |
085536c2 GM |
3230 | } |
3231 | } | |
3232 | else | |
116d6f5c | 3233 | safe_call1 (fn, pos); |
085536c2 GM |
3234 | } |
3235 | ||
3236 | UNGCPRO; | |
3237 | } | |
3238 | ||
3239 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
3240 | |
3241 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
3242 | something. This avoids an endless loop if they failed to | |
3243 | fontify the text for which reason ever. */ | |
3244 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
3245 | handled = HANDLED_RECOMPUTE_PROPS; | |
3246 | } | |
3247 | ||
3248 | return handled; | |
3249 | } | |
3250 | ||
3251 | ||
3252 | \f | |
3253 | /*********************************************************************** | |
3254 | Faces | |
3255 | ***********************************************************************/ | |
3256 | ||
3257 | /* Set up iterator IT from face properties at its current position. | |
3258 | Called from handle_stop. */ | |
3259 | ||
3260 | static enum prop_handled | |
3261 | handle_face_prop (it) | |
3262 | struct it *it; | |
3263 | { | |
3264 | int new_face_id, next_stop; | |
2311178e | 3265 | |
5f5c8ee5 GM |
3266 | if (!STRINGP (it->string)) |
3267 | { | |
3268 | new_face_id | |
3269 | = face_at_buffer_position (it->w, | |
3270 | IT_CHARPOS (*it), | |
3271 | it->region_beg_charpos, | |
3272 | it->region_end_charpos, | |
3273 | &next_stop, | |
3274 | (IT_CHARPOS (*it) | |
3275 | + TEXT_PROP_DISTANCE_LIMIT), | |
3276 | 0); | |
2311178e | 3277 | |
5f5c8ee5 GM |
3278 | /* Is this a start of a run of characters with box face? |
3279 | Caveat: this can be called for a freshly initialized | |
4b41cebb | 3280 | iterator; face_id is -1 in this case. We know that the new |
5f5c8ee5 GM |
3281 | face will not change until limit, i.e. if the new face has a |
3282 | box, all characters up to limit will have one. But, as | |
3283 | usual, we don't know whether limit is really the end. */ | |
3284 | if (new_face_id != it->face_id) | |
3285 | { | |
3286 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2311178e | 3287 | |
5f5c8ee5 GM |
3288 | /* If new face has a box but old face has not, this is |
3289 | the start of a run of characters with box, i.e. it has | |
3290 | a shadow on the left side. The value of face_id of the | |
3291 | iterator will be -1 if this is the initial call that gets | |
3292 | the face. In this case, we have to look in front of IT's | |
3293 | position and see whether there is a face != new_face_id. */ | |
3294 | it->start_of_box_run_p | |
3295 | = (new_face->box != FACE_NO_BOX | |
3296 | && (it->face_id >= 0 | |
3297 | || IT_CHARPOS (*it) == BEG | |
3298 | || new_face_id != face_before_it_pos (it))); | |
3299 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
3300 | } | |
3301 | } | |
3302 | else | |
3303 | { | |
06a12811 GM |
3304 | int base_face_id, bufpos; |
3305 | ||
3306 | if (it->current.overlay_string_index >= 0) | |
3307 | bufpos = IT_CHARPOS (*it); | |
3308 | else | |
3309 | bufpos = 0; | |
2311178e | 3310 | |
06a12811 GM |
3311 | /* For strings from a buffer, i.e. overlay strings or strings |
3312 | from a `display' property, use the face at IT's current | |
3313 | buffer position as the base face to merge with, so that | |
3314 | overlay strings appear in the same face as surrounding | |
3315 | text, unless they specify their own faces. */ | |
3316 | base_face_id = underlying_face_id (it); | |
2311178e | 3317 | |
06a12811 GM |
3318 | new_face_id = face_at_string_position (it->w, |
3319 | it->string, | |
3320 | IT_STRING_CHARPOS (*it), | |
3321 | bufpos, | |
3322 | it->region_beg_charpos, | |
3323 | it->region_end_charpos, | |
3324 | &next_stop, | |
5de7c6f2 | 3325 | base_face_id, 0); |
2311178e | 3326 | |
5f5c8ee5 GM |
3327 | #if 0 /* This shouldn't be neccessary. Let's check it. */ |
3328 | /* If IT is used to display a mode line we would really like to | |
3329 | use the mode line face instead of the frame's default face. */ | |
3330 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
3331 | && new_face_id == DEFAULT_FACE_ID) | |
96d2320f | 3332 | new_face_id = CURRENT_MODE_LINE_FACE_ID (it->w); |
5f5c8ee5 | 3333 | #endif |
2311178e | 3334 | |
5f5c8ee5 GM |
3335 | /* Is this a start of a run of characters with box? Caveat: |
3336 | this can be called for a freshly allocated iterator; face_id | |
3337 | is -1 is this case. We know that the new face will not | |
3338 | change until the next check pos, i.e. if the new face has a | |
3339 | box, all characters up to that position will have a | |
3340 | box. But, as usual, we don't know whether that position | |
3341 | is really the end. */ | |
3342 | if (new_face_id != it->face_id) | |
3343 | { | |
3344 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
3345 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2311178e | 3346 | |
5f5c8ee5 GM |
3347 | /* If new face has a box but old face hasn't, this is the |
3348 | start of a run of characters with box, i.e. it has a | |
3349 | shadow on the left side. */ | |
3350 | it->start_of_box_run_p | |
3351 | = new_face->box && (old_face == NULL || !old_face->box); | |
3352 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
3353 | } | |
3354 | } | |
2311178e | 3355 | |
5f5c8ee5 | 3356 | it->face_id = new_face_id; |
5f5c8ee5 GM |
3357 | return HANDLED_NORMALLY; |
3358 | } | |
3359 | ||
3360 | ||
06a12811 GM |
3361 | /* Return the ID of the face ``underlying'' IT's current position, |
3362 | which is in a string. If the iterator is associated with a | |
3363 | buffer, return the face at IT's current buffer position. | |
3364 | Otherwise, use the iterator's base_face_id. */ | |
3365 | ||
3366 | static int | |
3367 | underlying_face_id (it) | |
3368 | struct it *it; | |
3369 | { | |
3370 | int face_id = it->base_face_id, i; | |
3371 | ||
3372 | xassert (STRINGP (it->string)); | |
3373 | ||
3374 | for (i = it->sp - 1; i >= 0; --i) | |
3375 | if (NILP (it->stack[i].string)) | |
3376 | face_id = it->stack[i].face_id; | |
3377 | ||
3378 | return face_id; | |
3379 | } | |
3380 | ||
3381 | ||
5f5c8ee5 GM |
3382 | /* Compute the face one character before or after the current position |
3383 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
3384 | position. Value is the id of the face. */ | |
3385 | ||
3386 | static int | |
3387 | face_before_or_after_it_pos (it, before_p) | |
3388 | struct it *it; | |
3389 | int before_p; | |
3390 | { | |
3391 | int face_id, limit; | |
3392 | int next_check_charpos; | |
3393 | struct text_pos pos; | |
3394 | ||
3395 | xassert (it->s == NULL); | |
2311178e | 3396 | |
5f5c8ee5 GM |
3397 | if (STRINGP (it->string)) |
3398 | { | |
06a12811 | 3399 | int bufpos, base_face_id; |
2311178e | 3400 | |
5f5c8ee5 GM |
3401 | /* No face change past the end of the string (for the case |
3402 | we are padding with spaces). No face change before the | |
3403 | string start. */ | |
2051c264 | 3404 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string) |
5f5c8ee5 GM |
3405 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) |
3406 | return it->face_id; | |
3407 | ||
3408 | /* Set pos to the position before or after IT's current position. */ | |
3409 | if (before_p) | |
3410 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
3411 | else | |
260a86a0 KH |
3412 | /* For composition, we must check the character after the |
3413 | composition. */ | |
3414 | pos = (it->what == IT_COMPOSITION | |
3415 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
3416 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 3417 | |
06a12811 GM |
3418 | if (it->current.overlay_string_index >= 0) |
3419 | bufpos = IT_CHARPOS (*it); | |
3420 | else | |
3421 | bufpos = 0; | |
3422 | ||
3423 | base_face_id = underlying_face_id (it); | |
3424 | ||
5f5c8ee5 | 3425 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
3426 | face_id = face_at_string_position (it->w, |
3427 | it->string, | |
3428 | CHARPOS (pos), | |
3429 | bufpos, | |
3430 | it->region_beg_charpos, | |
3431 | it->region_end_charpos, | |
3432 | &next_check_charpos, | |
5de7c6f2 | 3433 | base_face_id, 0); |
5f5c8ee5 GM |
3434 | |
3435 | /* Correct the face for charsets different from ASCII. Do it | |
3436 | for the multibyte case only. The face returned above is | |
3437 | suitable for unibyte text if IT->string is unibyte. */ | |
3438 | if (STRING_MULTIBYTE (it->string)) | |
3439 | { | |
50f80c2f | 3440 | const unsigned char *p = SDATA (it->string) + BYTEPOS (pos); |
2051c264 | 3441 | int rest = SBYTES (it->string) - BYTEPOS (pos); |
980806b6 KH |
3442 | int c, len; |
3443 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2311178e | 3444 | |
4fdb80f2 | 3445 | c = string_char_and_length (p, rest, &len); |
980806b6 | 3446 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
3447 | } |
3448 | } | |
3449 | else | |
3450 | { | |
70851746 GM |
3451 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
3452 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
3453 | return it->face_id; | |
2311178e | 3454 | |
5f5c8ee5 GM |
3455 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
3456 | pos = it->current.pos; | |
2311178e | 3457 | |
5f5c8ee5 | 3458 | if (before_p) |
c1005d06 | 3459 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 3460 | else |
260a86a0 KH |
3461 | { |
3462 | if (it->what == IT_COMPOSITION) | |
3463 | /* For composition, we must check the position after the | |
3464 | composition. */ | |
3465 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
3466 | else | |
c1005d06 | 3467 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 3468 | } |
2311178e | 3469 | |
5f5c8ee5 GM |
3470 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
3471 | face_id = face_at_buffer_position (it->w, | |
3472 | CHARPOS (pos), | |
3473 | it->region_beg_charpos, | |
3474 | it->region_end_charpos, | |
3475 | &next_check_charpos, | |
3476 | limit, 0); | |
3477 | ||
3478 | /* Correct the face for charsets different from ASCII. Do it | |
3479 | for the multibyte case only. The face returned above is | |
3480 | suitable for unibyte text if current_buffer is unibyte. */ | |
3481 | if (it->multibyte_p) | |
3482 | { | |
1d1b6e6a | 3483 | int c = FETCH_MULTIBYTE_CHAR (BYTEPOS (pos)); |
980806b6 KH |
3484 | struct face *face = FACE_FROM_ID (it->f, face_id); |
3485 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
3486 | } |
3487 | } | |
2311178e | 3488 | |
5f5c8ee5 GM |
3489 | return face_id; |
3490 | } | |
3491 | ||
3492 | ||
3493 | \f | |
3494 | /*********************************************************************** | |
3495 | Invisible text | |
3496 | ***********************************************************************/ | |
3497 | ||
3498 | /* Set up iterator IT from invisible properties at its current | |
3499 | position. Called from handle_stop. */ | |
3500 | ||
3501 | static enum prop_handled | |
3502 | handle_invisible_prop (it) | |
3503 | struct it *it; | |
3504 | { | |
3505 | enum prop_handled handled = HANDLED_NORMALLY; | |
3506 | ||
3507 | if (STRINGP (it->string)) | |
3508 | { | |
3509 | extern Lisp_Object Qinvisible; | |
3510 | Lisp_Object prop, end_charpos, limit, charpos; | |
3511 | ||
3512 | /* Get the value of the invisible text property at the | |
3513 | current position. Value will be nil if there is no such | |
3514 | property. */ | |
ac90c44f | 3515 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
3516 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
3517 | ||
eadc0bf8 GM |
3518 | if (!NILP (prop) |
3519 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
3520 | { |
3521 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 3522 | |
5f5c8ee5 GM |
3523 | /* Get the position at which the next change of the |
3524 | invisible text property can be found in IT->string. | |
3525 | Value will be nil if the property value is the same for | |
3526 | all the rest of IT->string. */ | |
2051c264 | 3527 | XSETINT (limit, SCHARS (it->string)); |
5f5c8ee5 | 3528 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, |
2051c264 | 3529 | it->string, limit); |
2311178e | 3530 | |
5f5c8ee5 GM |
3531 | /* Text at current position is invisible. The next |
3532 | change in the property is at position end_charpos. | |
3533 | Move IT's current position to that position. */ | |
3534 | if (INTEGERP (end_charpos) | |
3535 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
3536 | { | |
3537 | struct text_pos old; | |
3538 | old = it->current.string_pos; | |
3539 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
3540 | compute_string_pos (&it->current.string_pos, old, it->string); | |
3541 | } | |
3542 | else | |
3543 | { | |
3544 | /* The rest of the string is invisible. If this is an | |
3545 | overlay string, proceed with the next overlay string | |
3546 | or whatever comes and return a character from there. */ | |
3547 | if (it->current.overlay_string_index >= 0) | |
3548 | { | |
3549 | next_overlay_string (it); | |
3550 | /* Don't check for overlay strings when we just | |
3551 | finished processing them. */ | |
3552 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
3553 | } | |
3554 | else | |
3555 | { | |
2051c264 GM |
3556 | IT_STRING_CHARPOS (*it) = SCHARS (it->string); |
3557 | IT_STRING_BYTEPOS (*it) = SBYTES (it->string); | |
5f5c8ee5 GM |
3558 | } |
3559 | } | |
3560 | } | |
3561 | } | |
3562 | else | |
3563 | { | |
8580a4e3 | 3564 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 3565 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
3566 | |
3567 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 3568 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 3569 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
3570 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
3571 | &overlay); | |
8580a4e3 SM |
3572 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
3573 | ||
5f5c8ee5 | 3574 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 3575 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
3576 | { |
3577 | /* Record whether we have to display an ellipsis for the | |
3578 | invisible text. */ | |
8580a4e3 | 3579 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
3580 | |
3581 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 3582 | |
5f5c8ee5 GM |
3583 | /* Loop skipping over invisible text. The loop is left at |
3584 | ZV or with IT on the first char being visible again. */ | |
3585 | do | |
3586 | { | |
3587 | /* Try to skip some invisible text. Return value is the | |
3588 | position reached which can be equal to IT's position | |
3589 | if there is nothing invisible here. This skips both | |
3590 | over invisible text properties and overlays with | |
3591 | invisible property. */ | |
3592 | newpos = skip_invisible (IT_CHARPOS (*it), | |
3593 | &next_stop, ZV, it->window); | |
3594 | ||
3595 | /* If we skipped nothing at all we weren't at invisible | |
3596 | text in the first place. If everything to the end of | |
3597 | the buffer was skipped, end the loop. */ | |
3598 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 3599 | invis_p = 0; |
5f5c8ee5 GM |
3600 | else |
3601 | { | |
3602 | /* We skipped some characters but not necessarily | |
3603 | all there are. Check if we ended up on visible | |
3604 | text. Fget_char_property returns the property of | |
3605 | the char before the given position, i.e. if we | |
8580a4e3 | 3606 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 3607 | newpos is visible. */ |
ac90c44f | 3608 | pos = make_number (newpos); |
5f5c8ee5 | 3609 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 3610 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 | 3611 | } |
2311178e | 3612 | |
5f5c8ee5 GM |
3613 | /* If we ended up on invisible text, proceed to |
3614 | skip starting with next_stop. */ | |
8580a4e3 | 3615 | if (invis_p) |
5f5c8ee5 GM |
3616 | IT_CHARPOS (*it) = next_stop; |
3617 | } | |
8580a4e3 | 3618 | while (invis_p); |
5a08cbaf | 3619 | |
5f5c8ee5 GM |
3620 | /* The position newpos is now either ZV or on visible text. */ |
3621 | IT_CHARPOS (*it) = newpos; | |
3622 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2311178e | 3623 | |
5a08cbaf GM |
3624 | /* If there are before-strings at the start of invisible |
3625 | text, and the text is invisible because of a text | |
3626 | property, arrange to show before-strings because 20.x did | |
3627 | it that way. (If the text is invisible because of an | |
3628 | overlay property instead of a text property, this is | |
3629 | already handled in the overlay code.) */ | |
3630 | if (NILP (overlay) | |
3631 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 3632 | { |
5a08cbaf GM |
3633 | handled = HANDLED_RECOMPUTE_PROPS; |
3634 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 3635 | } |
5a08cbaf | 3636 | else if (display_ellipsis_p) |
064fd8ec | 3637 | setup_for_ellipsis (it, 0); |
5f5c8ee5 GM |
3638 | } |
3639 | } | |
3640 | ||
3641 | return handled; | |
3642 | } | |
3643 | ||
3644 | ||
064fd8ec KS |
3645 | /* Make iterator IT return `...' next. |
3646 | Replaces LEN characters from buffer. */ | |
5a08cbaf GM |
3647 | |
3648 | static void | |
064fd8ec | 3649 | setup_for_ellipsis (it, len) |
5a08cbaf | 3650 | struct it *it; |
064fd8ec | 3651 | int len; |
5a08cbaf | 3652 | { |
064fd8ec KS |
3653 | /* Use the display table definition for `...'. Invalid glyphs |
3654 | will be handled by the method returning elements from dpvec. */ | |
3655 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
5a08cbaf GM |
3656 | { |
3657 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3658 | it->dpvec = v->contents; | |
3659 | it->dpend = v->contents + v->size; | |
3660 | } | |
2311178e | 3661 | else |
5a08cbaf GM |
3662 | { |
3663 | /* Default `...'. */ | |
3664 | it->dpvec = default_invis_vector; | |
3665 | it->dpend = default_invis_vector + 3; | |
3666 | } | |
2311178e | 3667 | |
064fd8ec | 3668 | it->dpvec_char_len = len; |
5a08cbaf | 3669 | it->current.dpvec_index = 0; |
fe1c2006 | 3670 | it->dpvec_face_id = -1; |
064fd8ec KS |
3671 | |
3672 | /* Remember the current face id in case glyphs specify faces. | |
ffd80825 KS |
3673 | IT's face is restored in set_iterator_to_next. |
3674 | saved_face_id was set to preceding char's face in handle_stop. */ | |
3675 | if (it->saved_face_id < 0 || it->saved_face_id != it->face_id) | |
3676 | it->saved_face_id = it->face_id = DEFAULT_FACE_ID; | |
62af9c24 | 3677 | |
a6f82cc4 | 3678 | it->method = GET_FROM_DISPLAY_VECTOR; |
f323e507 | 3679 | it->ellipsis_p = 1; |
5a08cbaf GM |
3680 | } |
3681 | ||
3682 | ||
5f5c8ee5 GM |
3683 | \f |
3684 | /*********************************************************************** | |
3685 | 'display' property | |
3686 | ***********************************************************************/ | |
3687 | ||
3688 | /* Set up iterator IT from `display' property at its current position. | |
b2683be4 RS |
3689 | Called from handle_stop. |
3690 | We return HANDLED_RETURN if some part of the display property | |
3691 | overrides the display of the buffer text itself. | |
3692 | Otherwise we return HANDLED_NORMALLY. */ | |
5f5c8ee5 GM |
3693 | |
3694 | static enum prop_handled | |
3695 | handle_display_prop (it) | |
3696 | struct it *it; | |
3697 | { | |
3698 | Lisp_Object prop, object; | |
3699 | struct text_pos *position; | |
99c71e51 | 3700 | /* Nonzero if some property replaces the display of the text itself. */ |
a61b7058 | 3701 | int display_replaced_p = 0; |
5f5c8ee5 GM |
3702 | |
3703 | if (STRINGP (it->string)) | |
3704 | { | |
3705 | object = it->string; | |
3706 | position = &it->current.string_pos; | |
3707 | } | |
3708 | else | |
3709 | { | |
d9eef135 | 3710 | XSETWINDOW (object, it->w); |
5f5c8ee5 GM |
3711 | position = &it->current.pos; |
3712 | } | |
3713 | ||
3714 | /* Reset those iterator values set from display property values. */ | |
e893970b | 3715 | it->slice.x = it->slice.y = it->slice.width = it->slice.height = Qnil; |
5f5c8ee5 | 3716 | it->space_width = Qnil; |
e893970b | 3717 | it->font_height = Qnil; |
5f5c8ee5 GM |
3718 | it->voffset = 0; |
3719 | ||
3720 | /* We don't support recursive `display' properties, i.e. string | |
3721 | values that have a string `display' property, that have a string | |
3722 | `display' property etc. */ | |
3723 | if (!it->string_from_display_prop_p) | |
3724 | it->area = TEXT_AREA; | |
3725 | ||
3726 | prop = Fget_char_property (make_number (position->charpos), | |
3727 | Qdisplay, object); | |
3728 | if (NILP (prop)) | |
3729 | return HANDLED_NORMALLY; | |
3730 | ||
d9eef135 KS |
3731 | if (!STRINGP (it->string)) |
3732 | object = it->w->buffer; | |
3733 | ||
f3751a65 | 3734 | if (CONSP (prop) |
12700f40 GM |
3735 | /* Simple properties. */ |
3736 | && !EQ (XCAR (prop), Qimage) | |
3737 | && !EQ (XCAR (prop), Qspace) | |
3738 | && !EQ (XCAR (prop), Qwhen) | |
e893970b | 3739 | && !EQ (XCAR (prop), Qslice) |
12700f40 GM |
3740 | && !EQ (XCAR (prop), Qspace_width) |
3741 | && !EQ (XCAR (prop), Qheight) | |
3742 | && !EQ (XCAR (prop), Qraise) | |
3743 | /* Marginal area specifications. */ | |
3744 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
6d925726 KS |
3745 | && !EQ (XCAR (prop), Qleft_fringe) |
3746 | && !EQ (XCAR (prop), Qright_fringe) | |
12700f40 | 3747 | && !NILP (XCAR (prop))) |
5f5c8ee5 | 3748 | { |
a61b7058 | 3749 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 3750 | { |
b2683be4 | 3751 | if (handle_single_display_spec (it, XCAR (prop), object, |
a61b7058 GM |
3752 | position, display_replaced_p)) |
3753 | display_replaced_p = 1; | |
5f5c8ee5 GM |
3754 | } |
3755 | } | |
3756 | else if (VECTORP (prop)) | |
3757 | { | |
3758 | int i; | |
a61b7058 | 3759 | for (i = 0; i < ASIZE (prop); ++i) |
b2683be4 | 3760 | if (handle_single_display_spec (it, AREF (prop, i), object, |
a61b7058 GM |
3761 | position, display_replaced_p)) |
3762 | display_replaced_p = 1; | |
5f5c8ee5 GM |
3763 | } |
3764 | else | |
3765 | { | |
a605fefc KS |
3766 | int ret = handle_single_display_spec (it, prop, object, position, 0); |
3767 | if (ret < 0) /* Replaced by "", i.e. nothing. */ | |
3768 | return HANDLED_RECOMPUTE_PROPS; | |
3769 | if (ret) | |
a61b7058 | 3770 | display_replaced_p = 1; |
5f5c8ee5 GM |
3771 | } |
3772 | ||
a61b7058 | 3773 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
3774 | } |
3775 | ||
3776 | ||
6c577098 | 3777 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
3778 | at START_POS in OBJECT. */ |
3779 | ||
3780 | static struct text_pos | |
3781 | display_prop_end (it, object, start_pos) | |
3782 | struct it *it; | |
3783 | Lisp_Object object; | |
3784 | struct text_pos start_pos; | |
3785 | { | |
3786 | Lisp_Object end; | |
3787 | struct text_pos end_pos; | |
5f5c8ee5 | 3788 | |
016b5642 MB |
3789 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
3790 | Qdisplay, object, Qnil); | |
6c577098 GM |
3791 | CHARPOS (end_pos) = XFASTINT (end); |
3792 | if (STRINGP (object)) | |
5f5c8ee5 GM |
3793 | compute_string_pos (&end_pos, start_pos, it->string); |
3794 | else | |
6c577098 | 3795 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
3796 | |
3797 | return end_pos; | |
3798 | } | |
3799 | ||
3800 | ||
b2683be4 | 3801 | /* Set up IT from a single `display' specification PROP. OBJECT |
5f5c8ee5 | 3802 | is the object in which the `display' property was found. *POSITION |
a61b7058 | 3803 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
b2683be4 | 3804 | means that we previously saw a display specification which already |
a61b7058 | 3805 | replaced text display with something else, for example an image; |
b2683be4 | 3806 | we ignore such properties after the first one has been processed. |
5f5c8ee5 | 3807 | |
b2683be4 RS |
3808 | If PROP is a `space' or `image' specification, and in some other |
3809 | cases too, set *POSITION to the position where the `display' | |
3810 | property ends. | |
5f5c8ee5 | 3811 | |
4b41cebb | 3812 | Value is non-zero if something was found which replaces the display |
a605fefc KS |
3813 | of buffer or string text. Specifically, the value is -1 if that |
3814 | "something" is "nothing". */ | |
5f5c8ee5 GM |
3815 | |
3816 | static int | |
b2683be4 | 3817 | handle_single_display_spec (it, spec, object, position, |
a61b7058 | 3818 | display_replaced_before_p) |
5f5c8ee5 | 3819 | struct it *it; |
b2683be4 | 3820 | Lisp_Object spec; |
5f5c8ee5 GM |
3821 | Lisp_Object object; |
3822 | struct text_pos *position; | |
a61b7058 | 3823 | int display_replaced_before_p; |
5f5c8ee5 | 3824 | { |
5f5c8ee5 | 3825 | Lisp_Object form; |
b2683be4 RS |
3826 | Lisp_Object location, value; |
3827 | struct text_pos start_pos; | |
3828 | int valid_p; | |
5f5c8ee5 | 3829 | |
b2683be4 RS |
3830 | /* If SPEC is a list of the form `(when FORM . VALUE)', evaluate FORM. |
3831 | If the result is non-nil, use VALUE instead of SPEC. */ | |
5f5c8ee5 | 3832 | form = Qt; |
b2683be4 | 3833 | if (CONSP (spec) && EQ (XCAR (spec), Qwhen)) |
5f5c8ee5 | 3834 | { |
b2683be4 RS |
3835 | spec = XCDR (spec); |
3836 | if (!CONSP (spec)) | |
5f5c8ee5 | 3837 | return 0; |
b2683be4 RS |
3838 | form = XCAR (spec); |
3839 | spec = XCDR (spec); | |
5f5c8ee5 GM |
3840 | } |
3841 | ||
3842 | if (!NILP (form) && !EQ (form, Qt)) | |
3843 | { | |
331379bf | 3844 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 3845 | struct gcpro gcpro1; |
5f5c8ee5 | 3846 | |
b384d6f8 GM |
3847 | /* Bind `object' to the object having the `display' property, a |
3848 | buffer or string. Bind `position' to the position in the | |
3849 | object where the property was found, and `buffer-position' | |
3850 | to the current position in the buffer. */ | |
3851 | specbind (Qobject, object); | |
31ac723b SM |
3852 | specbind (Qposition, make_number (CHARPOS (*position))); |
3853 | specbind (Qbuffer_position, | |
3854 | make_number (STRINGP (object) | |
3855 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 3856 | GCPRO1 (form); |
116d6f5c | 3857 | form = safe_eval (form); |
b384d6f8 GM |
3858 | UNGCPRO; |
3859 | unbind_to (count, Qnil); | |
5f5c8ee5 | 3860 | } |
2311178e | 3861 | |
5f5c8ee5 GM |
3862 | if (NILP (form)) |
3863 | return 0; | |
3864 | ||
b2683be4 RS |
3865 | /* Handle `(height HEIGHT)' specifications. */ |
3866 | if (CONSP (spec) | |
3867 | && EQ (XCAR (spec), Qheight) | |
3868 | && CONSP (XCDR (spec))) | |
5f5c8ee5 | 3869 | { |
e4093f38 | 3870 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 | 3871 | return 0; |
99c71e51 | 3872 | |
b2683be4 | 3873 | it->font_height = XCAR (XCDR (spec)); |
5f5c8ee5 GM |
3874 | if (!NILP (it->font_height)) |
3875 | { | |
3876 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
3877 | int new_height = -1; | |
3878 | ||
3879 | if (CONSP (it->font_height) | |
3880 | && (EQ (XCAR (it->font_height), Qplus) | |
3881 | || EQ (XCAR (it->font_height), Qminus)) | |
3882 | && CONSP (XCDR (it->font_height)) | |
3883 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
3884 | { | |
3885 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
3886 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
3887 | if (EQ (XCAR (it->font_height), Qplus)) | |
3888 | steps = - steps; | |
3889 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
3890 | } | |
0d8b31c0 | 3891 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
3892 | { |
3893 | /* Call function with current height as argument. | |
3894 | Value is the new height. */ | |
116d6f5c GM |
3895 | Lisp_Object height; |
3896 | height = safe_call1 (it->font_height, | |
3897 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
3898 | if (NUMBERP (height)) |
3899 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
3900 | } |
3901 | else if (NUMBERP (it->font_height)) | |
3902 | { | |
3903 | /* Value is a multiple of the canonical char height. */ | |
3904 | struct face *face; | |
2311178e | 3905 | |
5f5c8ee5 GM |
3906 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); |
3907 | new_height = (XFLOATINT (it->font_height) | |
3908 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
3909 | } | |
3910 | else | |
3911 | { | |
3912 | /* Evaluate IT->font_height with `height' bound to the | |
3913 | current specified height to get the new height. */ | |
331379bf | 3914 | int count = SPECPDL_INDEX (); |
2311178e | 3915 | |
5f5c8ee5 | 3916 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); |
116d6f5c | 3917 | value = safe_eval (it->font_height); |
5f5c8ee5 | 3918 | unbind_to (count, Qnil); |
2311178e | 3919 | |
5f5c8ee5 GM |
3920 | if (NUMBERP (value)) |
3921 | new_height = XFLOATINT (value); | |
3922 | } | |
2311178e | 3923 | |
5f5c8ee5 GM |
3924 | if (new_height > 0) |
3925 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
3926 | } | |
b2683be4 RS |
3927 | |
3928 | return 0; | |
5f5c8ee5 | 3929 | } |
b2683be4 RS |
3930 | |
3931 | /* Handle `(space_width WIDTH)'. */ | |
3932 | if (CONSP (spec) | |
3933 | && EQ (XCAR (spec), Qspace_width) | |
3934 | && CONSP (XCDR (spec))) | |
5f5c8ee5 | 3935 | { |
e4093f38 | 3936 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3937 | return 0; |
2311178e | 3938 | |
b2683be4 | 3939 | value = XCAR (XCDR (spec)); |
5f5c8ee5 GM |
3940 | if (NUMBERP (value) && XFLOATINT (value) > 0) |
3941 | it->space_width = value; | |
b2683be4 RS |
3942 | |
3943 | return 0; | |
5f5c8ee5 | 3944 | } |
b2683be4 RS |
3945 | |
3946 | /* Handle `(slice X Y WIDTH HEIGHT)'. */ | |
3947 | if (CONSP (spec) | |
3948 | && EQ (XCAR (spec), Qslice)) | |
e893970b | 3949 | { |
e893970b KS |
3950 | Lisp_Object tem; |
3951 | ||
3952 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
3953 | return 0; | |
3954 | ||
b2683be4 | 3955 | if (tem = XCDR (spec), CONSP (tem)) |
e893970b KS |
3956 | { |
3957 | it->slice.x = XCAR (tem); | |
3958 | if (tem = XCDR (tem), CONSP (tem)) | |
3959 | { | |
3960 | it->slice.y = XCAR (tem); | |
3961 | if (tem = XCDR (tem), CONSP (tem)) | |
3962 | { | |
3963 | it->slice.width = XCAR (tem); | |
3964 | if (tem = XCDR (tem), CONSP (tem)) | |
3965 | it->slice.height = XCAR (tem); | |
3966 | } | |
3967 | } | |
3968 | } | |
b2683be4 RS |
3969 | |
3970 | return 0; | |
e893970b | 3971 | } |
b2683be4 RS |
3972 | |
3973 | /* Handle `(raise FACTOR)'. */ | |
3974 | if (CONSP (spec) | |
3975 | && EQ (XCAR (spec), Qraise) | |
3976 | && CONSP (XCDR (spec))) | |
5f5c8ee5 | 3977 | { |
e4093f38 | 3978 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3979 | return 0; |
2311178e | 3980 | |
fb3842a8 | 3981 | #ifdef HAVE_WINDOW_SYSTEM |
b2683be4 | 3982 | value = XCAR (XCDR (spec)); |
5f5c8ee5 GM |
3983 | if (NUMBERP (value)) |
3984 | { | |
3985 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
3986 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 3987 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
3988 | } |
3989 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b2683be4 RS |
3990 | |
3991 | return 0; | |
5f5c8ee5 | 3992 | } |
5f5c8ee5 | 3993 | |
b2683be4 RS |
3994 | /* Don't handle the other kinds of display specifications |
3995 | inside a string that we got from a `display' property. */ | |
3996 | if (it->string_from_display_prop_p) | |
3997 | return 0; | |
5f5c8ee5 | 3998 | |
b2683be4 RS |
3999 | /* Characters having this form of property are not displayed, so |
4000 | we have to find the end of the property. */ | |
4001 | start_pos = *position; | |
4002 | *position = display_prop_end (it, object, start_pos); | |
4003 | value = Qnil; | |
5f5c8ee5 | 4004 | |
b2683be4 RS |
4005 | /* Stop the scan at that end position--we assume that all |
4006 | text properties change there. */ | |
4007 | it->stop_charpos = position->charpos; | |
dd341dd9 | 4008 | |
b2683be4 RS |
4009 | /* Handle `(left-fringe BITMAP [FACE])' |
4010 | and `(right-fringe BITMAP [FACE])'. */ | |
4011 | if (CONSP (spec) | |
4012 | && (EQ (XCAR (spec), Qleft_fringe) | |
4013 | || EQ (XCAR (spec), Qright_fringe)) | |
4014 | && CONSP (XCDR (spec))) | |
4015 | { | |
4016 | int face_id = DEFAULT_FACE_ID; | |
4017 | int fringe_bitmap; | |
dd341dd9 | 4018 | |
b2683be4 RS |
4019 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
4020 | /* If we return here, POSITION has been advanced | |
4021 | across the text with this property. */ | |
4022 | return 0; | |
dd341dd9 KS |
4023 | |
4024 | #ifdef HAVE_WINDOW_SYSTEM | |
b2683be4 RS |
4025 | value = XCAR (XCDR (spec)); |
4026 | if (!SYMBOLP (value) | |
4027 | || !(fringe_bitmap = lookup_fringe_bitmap (value))) | |
4028 | /* If we return here, POSITION has been advanced | |
4029 | across the text with this property. */ | |
4030 | return 0; | |
dd341dd9 | 4031 | |
b2683be4 RS |
4032 | if (CONSP (XCDR (XCDR (spec)))) |
4033 | { | |
4034 | Lisp_Object face_name = XCAR (XCDR (XCDR (spec))); | |
3a2b4c84 KS |
4035 | int face_id2 = lookup_derived_face (it->f, face_name, |
4036 | 'A', FRINGE_FACE_ID, 0); | |
b2683be4 RS |
4037 | if (face_id2 >= 0) |
4038 | face_id = face_id2; | |
4039 | } | |
dd341dd9 | 4040 | |
b2683be4 RS |
4041 | /* Save current settings of IT so that we can restore them |
4042 | when we are finished with the glyph property value. */ | |
dd341dd9 | 4043 | |
b2683be4 | 4044 | push_it (it); |
dd341dd9 | 4045 | |
b2683be4 RS |
4046 | it->area = TEXT_AREA; |
4047 | it->what = IT_IMAGE; | |
4048 | it->image_id = -1; /* no image */ | |
4049 | it->position = start_pos; | |
4050 | it->object = NILP (object) ? it->w->buffer : object; | |
a6f82cc4 | 4051 | it->method = GET_FROM_IMAGE; |
b2683be4 | 4052 | it->face_id = face_id; |
dd341dd9 | 4053 | |
b2683be4 RS |
4054 | /* Say that we haven't consumed the characters with |
4055 | `display' property yet. The call to pop_it in | |
4056 | set_iterator_to_next will clean this up. */ | |
4057 | *position = start_pos; | |
dd341dd9 | 4058 | |
b2683be4 | 4059 | if (EQ (XCAR (spec), Qleft_fringe)) |
5f5c8ee5 | 4060 | { |
b2683be4 RS |
4061 | it->left_user_fringe_bitmap = fringe_bitmap; |
4062 | it->left_user_fringe_face_id = face_id; | |
5f5c8ee5 | 4063 | } |
b2683be4 | 4064 | else |
5f5c8ee5 | 4065 | { |
b2683be4 RS |
4066 | it->right_user_fringe_bitmap = fringe_bitmap; |
4067 | it->right_user_fringe_face_id = face_id; | |
5f5c8ee5 | 4068 | } |
b2683be4 RS |
4069 | #endif /* HAVE_WINDOW_SYSTEM */ |
4070 | return 1; | |
4071 | } | |
5f5c8ee5 | 4072 | |
b2683be4 RS |
4073 | /* Prepare to handle `((margin left-margin) ...)', |
4074 | `((margin right-margin) ...)' and `((margin nil) ...)' | |
4075 | prefixes for display specifications. */ | |
4076 | location = Qunbound; | |
4077 | if (CONSP (spec) && CONSP (XCAR (spec))) | |
4078 | { | |
4079 | Lisp_Object tem; | |
2311178e | 4080 | |
b2683be4 RS |
4081 | value = XCDR (spec); |
4082 | if (CONSP (value)) | |
4083 | value = XCAR (value); | |
2311178e | 4084 | |
b2683be4 RS |
4085 | tem = XCAR (spec); |
4086 | if (EQ (XCAR (tem), Qmargin) | |
4087 | && (tem = XCDR (tem), | |
4088 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
4089 | (NILP (tem) | |
4090 | || EQ (tem, Qleft_margin) | |
4091 | || EQ (tem, Qright_margin)))) | |
4092 | location = tem; | |
4093 | } | |
2311178e | 4094 | |
b2683be4 RS |
4095 | if (EQ (location, Qunbound)) |
4096 | { | |
4097 | location = Qnil; | |
4098 | value = spec; | |
4099 | } | |
2311178e | 4100 | |
b2683be4 RS |
4101 | /* After this point, VALUE is the property after any |
4102 | margin prefix has been stripped. It must be a string, | |
4103 | an image specification, or `(space ...)'. | |
4104 | ||
4105 | LOCATION specifies where to display: `left-margin', | |
4106 | `right-margin' or nil. */ | |
4107 | ||
4108 | valid_p = (STRINGP (value) | |
5f5c8ee5 | 4109 | #ifdef HAVE_WINDOW_SYSTEM |
b2683be4 RS |
4110 | || (!FRAME_TERMCAP_P (it->f) && valid_image_p (value)) |
4111 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
4112 | || (CONSP (value) && EQ (XCAR (value), Qspace))); | |
4113 | ||
4114 | if (valid_p && !display_replaced_before_p) | |
4115 | { | |
4116 | /* Save current settings of IT so that we can restore them | |
4117 | when we are finished with the glyph property value. */ | |
4118 | push_it (it); | |
4119 | ||
4120 | if (NILP (location)) | |
4121 | it->area = TEXT_AREA; | |
4122 | else if (EQ (location, Qleft_margin)) | |
4123 | it->area = LEFT_MARGIN_AREA; | |
4124 | else | |
4125 | it->area = RIGHT_MARGIN_AREA; | |
4126 | ||
4127 | if (STRINGP (value)) | |
4128 | { | |
a605fefc KS |
4129 | if (SCHARS (value) == 0) |
4130 | { | |
4131 | pop_it (it); | |
4132 | return -1; /* Replaced by "", i.e. nothing. */ | |
4133 | } | |
b2683be4 RS |
4134 | it->string = value; |
4135 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
4136 | it->current.overlay_string_index = -1; | |
4137 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
4138 | it->end_charpos = it->string_nchars = SCHARS (it->string); | |
a6f82cc4 | 4139 | it->method = GET_FROM_STRING; |
b2683be4 RS |
4140 | it->stop_charpos = 0; |
4141 | it->string_from_display_prop_p = 1; | |
4142 | /* Say that we haven't consumed the characters with | |
4143 | `display' property yet. The call to pop_it in | |
4144 | set_iterator_to_next will clean this up. */ | |
4145 | *position = start_pos; | |
4146 | } | |
4147 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
4148 | { | |
a6f82cc4 | 4149 | it->method = GET_FROM_STRETCH; |
b2683be4 RS |
4150 | it->object = value; |
4151 | it->current.pos = it->position = start_pos; | |
5f5c8ee5 | 4152 | } |
b2683be4 | 4153 | #ifdef HAVE_WINDOW_SYSTEM |
a21a3943 | 4154 | else |
b2683be4 RS |
4155 | { |
4156 | it->what = IT_IMAGE; | |
4157 | it->image_id = lookup_image (it->f, value); | |
4158 | it->position = start_pos; | |
4159 | it->object = NILP (object) ? it->w->buffer : object; | |
a6f82cc4 | 4160 | it->method = GET_FROM_IMAGE; |
b2683be4 RS |
4161 | |
4162 | /* Say that we haven't consumed the characters with | |
4163 | `display' property yet. The call to pop_it in | |
4164 | set_iterator_to_next will clean this up. */ | |
4165 | *position = start_pos; | |
4166 | } | |
4167 | #endif /* HAVE_WINDOW_SYSTEM */ | |
4168 | ||
4169 | return 1; | |
5f5c8ee5 GM |
4170 | } |
4171 | ||
b2683be4 RS |
4172 | /* Invalid property or property not supported. Restore |
4173 | POSITION to what it was before. */ | |
4174 | *position = start_pos; | |
4175 | return 0; | |
5f5c8ee5 GM |
4176 | } |
4177 | ||
4178 | ||
b2683be4 | 4179 | /* Check if SPEC is a display specification value whose text should be |
06568bbf GM |
4180 | treated as intangible. */ |
4181 | ||
4182 | static int | |
b2683be4 | 4183 | single_display_spec_intangible_p (prop) |
06568bbf GM |
4184 | Lisp_Object prop; |
4185 | { | |
4186 | /* Skip over `when FORM'. */ | |
4187 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
4188 | { | |
4189 | prop = XCDR (prop); | |
4190 | if (!CONSP (prop)) | |
4191 | return 0; | |
4192 | prop = XCDR (prop); | |
4193 | } | |
4194 | ||
959bc044 SM |
4195 | if (STRINGP (prop)) |
4196 | return 1; | |
4197 | ||
06568bbf GM |
4198 | if (!CONSP (prop)) |
4199 | return 0; | |
4200 | ||
4201 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
4202 | we don't need to treat text as intangible. */ | |
4203 | if (EQ (XCAR (prop), Qmargin)) | |
4204 | { | |
4205 | prop = XCDR (prop); | |
4206 | if (!CONSP (prop)) | |
4207 | return 0; | |
4208 | ||
4209 | prop = XCDR (prop); | |
4210 | if (!CONSP (prop) | |
4211 | || EQ (XCAR (prop), Qleft_margin) | |
4212 | || EQ (XCAR (prop), Qright_margin)) | |
4213 | return 0; | |
4214 | } | |
2311178e | 4215 | |
6cd83a9a SM |
4216 | return (CONSP (prop) |
4217 | && (EQ (XCAR (prop), Qimage) | |
4218 | || EQ (XCAR (prop), Qspace))); | |
06568bbf GM |
4219 | } |
4220 | ||
4221 | ||
4222 | /* Check if PROP is a display property value whose text should be | |
4223 | treated as intangible. */ | |
4224 | ||
4225 | int | |
4226 | display_prop_intangible_p (prop) | |
4227 | Lisp_Object prop; | |
4228 | { | |
4229 | if (CONSP (prop) | |
4230 | && CONSP (XCAR (prop)) | |
4231 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
4232 | { | |
4233 | /* A list of sub-properties. */ | |
4234 | while (CONSP (prop)) | |
4235 | { | |
b2683be4 | 4236 | if (single_display_spec_intangible_p (XCAR (prop))) |
06568bbf GM |
4237 | return 1; |
4238 | prop = XCDR (prop); | |
4239 | } | |
4240 | } | |
4241 | else if (VECTORP (prop)) | |
4242 | { | |
4243 | /* A vector of sub-properties. */ | |
4244 | int i; | |
a61b7058 | 4245 | for (i = 0; i < ASIZE (prop); ++i) |
b2683be4 | 4246 | if (single_display_spec_intangible_p (AREF (prop, i))) |
06568bbf GM |
4247 | return 1; |
4248 | } | |
4249 | else | |
b2683be4 | 4250 | return single_display_spec_intangible_p (prop); |
06568bbf GM |
4251 | |
4252 | return 0; | |
4253 | } | |
4254 | ||
74bd6d65 GM |
4255 | |
4256 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
4257 | ||
4258 | static int | |
b2683be4 | 4259 | single_display_spec_string_p (prop, string) |
74bd6d65 GM |
4260 | Lisp_Object prop, string; |
4261 | { | |
74bd6d65 GM |
4262 | if (EQ (string, prop)) |
4263 | return 1; | |
2311178e | 4264 | |
74bd6d65 GM |
4265 | /* Skip over `when FORM'. */ |
4266 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
4267 | { | |
4268 | prop = XCDR (prop); | |
4269 | if (!CONSP (prop)) | |
4270 | return 0; | |
4271 | prop = XCDR (prop); | |
4272 | } | |
4273 | ||
4274 | if (CONSP (prop)) | |
4275 | /* Skip over `margin LOCATION'. */ | |
4276 | if (EQ (XCAR (prop), Qmargin)) | |
4277 | { | |
4278 | prop = XCDR (prop); | |
4279 | if (!CONSP (prop)) | |
4280 | return 0; | |
4281 | ||
4282 | prop = XCDR (prop); | |
4283 | if (!CONSP (prop)) | |
4284 | return 0; | |
4285 | } | |
2311178e | 4286 | |
74bd6d65 GM |
4287 | return CONSP (prop) && EQ (XCAR (prop), string); |
4288 | } | |
4289 | ||
4290 | ||
4291 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
4292 | ||
4293 | static int | |
4294 | display_prop_string_p (prop, string) | |
4295 | Lisp_Object prop, string; | |
4296 | { | |
74bd6d65 GM |
4297 | if (CONSP (prop) |
4298 | && CONSP (XCAR (prop)) | |
4299 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
4300 | { | |
4301 | /* A list of sub-properties. */ | |
4302 | while (CONSP (prop)) | |
4303 | { | |
b2683be4 | 4304 | if (single_display_spec_string_p (XCAR (prop), string)) |
74bd6d65 GM |
4305 | return 1; |
4306 | prop = XCDR (prop); | |
4307 | } | |
4308 | } | |
4309 | else if (VECTORP (prop)) | |
4310 | { | |
4311 | /* A vector of sub-properties. */ | |
4312 | int i; | |
4313 | for (i = 0; i < ASIZE (prop); ++i) | |
b2683be4 | 4314 | if (single_display_spec_string_p (AREF (prop, i), string)) |
74bd6d65 GM |
4315 | return 1; |
4316 | } | |
4317 | else | |
b2683be4 | 4318 | return single_display_spec_string_p (prop, string); |
74bd6d65 GM |
4319 | |
4320 | return 0; | |
4321 | } | |
4322 | ||
4323 | ||
4324 | /* Determine from which buffer position in W's buffer STRING comes | |
4325 | from. AROUND_CHARPOS is an approximate position where it could | |
4326 | be from. Value is the buffer position or 0 if it couldn't be | |
4327 | determined. | |
4328 | ||
4329 | W's buffer must be current. | |
4330 | ||
4331 | This function is necessary because we don't record buffer positions | |
4332 | in glyphs generated from strings (to keep struct glyph small). | |
4333 | This function may only use code that doesn't eval because it is | |
4334 | called asynchronously from note_mouse_highlight. */ | |
4335 | ||
4336 | int | |
4337 | string_buffer_position (w, string, around_charpos) | |
4338 | struct window *w; | |
4339 | Lisp_Object string; | |
4340 | int around_charpos; | |
4341 | { | |
74bd6d65 GM |
4342 | Lisp_Object limit, prop, pos; |
4343 | const int MAX_DISTANCE = 1000; | |
4344 | int found = 0; | |
4345 | ||
d8731202 | 4346 | pos = make_number (around_charpos); |
74bd6d65 GM |
4347 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
4348 | while (!found && !EQ (pos, limit)) | |
4349 | { | |
4350 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
4351 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
4352 | found = 1; | |
4353 | else | |
134d9283 | 4354 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
4355 | } |
4356 | ||
4357 | if (!found) | |
4358 | { | |
d8731202 | 4359 | pos = make_number (around_charpos); |
74bd6d65 GM |
4360 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
4361 | while (!found && !EQ (pos, limit)) | |
4362 | { | |
4363 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
4364 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
4365 | found = 1; | |
4366 | else | |
134d9283 GM |
4367 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
4368 | limit); | |
74bd6d65 GM |
4369 | } |
4370 | } | |
4371 | ||
4372 | return found ? XINT (pos) : 0; | |
4373 | } | |
4374 | ||
4375 | ||
5f5c8ee5 | 4376 | \f |
260a86a0 KH |
4377 | /*********************************************************************** |
4378 | `composition' property | |
4379 | ***********************************************************************/ | |
4380 | ||
4381 | /* Set up iterator IT from `composition' property at its current | |
4382 | position. Called from handle_stop. */ | |
4383 | ||
4384 | static enum prop_handled | |
4385 | handle_composition_prop (it) | |
4386 | struct it *it; | |
4387 | { | |
4388 | Lisp_Object prop, string; | |
4389 | int pos, pos_byte, end; | |
4390 | enum prop_handled handled = HANDLED_NORMALLY; | |
4391 | ||
4392 | if (STRINGP (it->string)) | |
4393 | { | |
4394 | pos = IT_STRING_CHARPOS (*it); | |
4395 | pos_byte = IT_STRING_BYTEPOS (*it); | |
4396 | string = it->string; | |
4397 | } | |
4398 | else | |
4399 | { | |
4400 | pos = IT_CHARPOS (*it); | |
4401 | pos_byte = IT_BYTEPOS (*it); | |
4402 | string = Qnil; | |
4403 | } | |
4404 | ||
4405 | /* If there's a valid composition and point is not inside of the | |
4406 | composition (in the case that the composition is from the current | |
4407 | buffer), draw a glyph composed from the composition components. */ | |
4408 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
4409 | && COMPOSITION_VALID_P (pos, end, prop) | |
4410 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
4411 | { | |
4412 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
4413 | ||
4414 | if (id >= 0) | |
4415 | { | |
a6f82cc4 | 4416 | it->method = GET_FROM_COMPOSITION; |
260a86a0 KH |
4417 | it->cmp_id = id; |
4418 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
4419 | /* For a terminal, draw only the first character of the | |
4420 | components. */ | |
4421 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
4422 | it->len = (STRINGP (it->string) | |
4423 | ? string_char_to_byte (it->string, end) | |
4424 | : CHAR_TO_BYTE (end)) - pos_byte; | |
4425 | it->stop_charpos = end; | |
4426 | handled = HANDLED_RETURN; | |
4427 | } | |
4428 | } | |
4429 | ||
4430 | return handled; | |
4431 | } | |
4432 | ||
4433 | ||
4434 | \f | |
5f5c8ee5 GM |
4435 | /*********************************************************************** |
4436 | Overlay strings | |
4437 | ***********************************************************************/ | |
4438 | ||
4439 | /* The following structure is used to record overlay strings for | |
4440 | later sorting in load_overlay_strings. */ | |
4441 | ||
4442 | struct overlay_entry | |
4443 | { | |
2970b9be | 4444 | Lisp_Object overlay; |
5f5c8ee5 GM |
4445 | Lisp_Object string; |
4446 | int priority; | |
4447 | int after_string_p; | |
4448 | }; | |
4449 | ||
4450 | ||
4451 | /* Set up iterator IT from overlay strings at its current position. | |
4452 | Called from handle_stop. */ | |
4453 | ||
4454 | static enum prop_handled | |
4455 | handle_overlay_change (it) | |
4456 | struct it *it; | |
4457 | { | |
5a08cbaf | 4458 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 4459 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 4460 | else |
2970b9be | 4461 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
4462 | } |
4463 | ||
4464 | ||
4465 | /* Set up the next overlay string for delivery by IT, if there is an | |
4466 | overlay string to deliver. Called by set_iterator_to_next when the | |
4467 | end of the current overlay string is reached. If there are more | |
4468 | overlay strings to display, IT->string and | |
4469 | IT->current.overlay_string_index are set appropriately here. | |
4470 | Otherwise IT->string is set to nil. */ | |
2311178e | 4471 | |
5f5c8ee5 GM |
4472 | static void |
4473 | next_overlay_string (it) | |
4474 | struct it *it; | |
4475 | { | |
4476 | ++it->current.overlay_string_index; | |
4477 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
4478 | { | |
4479 | /* No more overlay strings. Restore IT's settings to what | |
4480 | they were before overlay strings were processed, and | |
4481 | continue to deliver from current_buffer. */ | |
5a08cbaf | 4482 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
2311178e | 4483 | |
5f5c8ee5 GM |
4484 | pop_it (it); |
4485 | xassert (it->stop_charpos >= BEGV | |
4486 | && it->stop_charpos <= it->end_charpos); | |
4487 | it->string = Qnil; | |
4488 | it->current.overlay_string_index = -1; | |
4489 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
4490 | it->n_overlay_strings = 0; | |
a6f82cc4 | 4491 | it->method = GET_FROM_BUFFER; |
2970b9be GM |
4492 | |
4493 | /* If we're at the end of the buffer, record that we have | |
4494 | processed the overlay strings there already, so that | |
4495 | next_element_from_buffer doesn't try it again. */ | |
4496 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4497 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
4498 | |
4499 | /* If we have to display `...' for invisible text, set | |
4500 | the iterator up for that. */ | |
4501 | if (display_ellipsis_p) | |
064fd8ec | 4502 | setup_for_ellipsis (it, 0); |
5f5c8ee5 GM |
4503 | } |
4504 | else | |
4505 | { | |
4506 | /* There are more overlay strings to process. If | |
4507 | IT->current.overlay_string_index has advanced to a position | |
4508 | where we must load IT->overlay_strings with more strings, do | |
4509 | it. */ | |
4510 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2311178e | 4511 | |
5f5c8ee5 | 4512 | if (it->current.overlay_string_index && i == 0) |
5a08cbaf | 4513 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
4514 | |
4515 | /* Initialize IT to deliver display elements from the overlay | |
4516 | string. */ | |
4517 | it->string = it->overlay_strings[i]; | |
4518 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
4519 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
a6f82cc4 | 4520 | it->method = GET_FROM_STRING; |
5f5c8ee5 GM |
4521 | it->stop_charpos = 0; |
4522 | } | |
2311178e | 4523 | |
5f5c8ee5 GM |
4524 | CHECK_IT (it); |
4525 | } | |
4526 | ||
4527 | ||
4528 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
4529 | comparison function for qsort in load_overlay_strings. Overlay | |
4530 | strings for the same position are sorted so that | |
4531 | ||
2970b9be GM |
4532 | 1. All after-strings come in front of before-strings, except |
4533 | when they come from the same overlay. | |
2311178e | 4534 | |
5f5c8ee5 GM |
4535 | 2. Within after-strings, strings are sorted so that overlay strings |
4536 | from overlays with higher priorities come first. | |
4537 | ||
4538 | 2. Within before-strings, strings are sorted so that overlay | |
4539 | strings from overlays with higher priorities come last. | |
4540 | ||
4541 | Value is analogous to strcmp. */ | |
4542 | ||
2311178e | 4543 | |
5f5c8ee5 GM |
4544 | static int |
4545 | compare_overlay_entries (e1, e2) | |
4546 | void *e1, *e2; | |
4547 | { | |
4548 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
4549 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
4550 | int result; | |
4551 | ||
4552 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
4553 | { |
4554 | /* Let after-strings appear in front of before-strings if | |
4555 | they come from different overlays. */ | |
4556 | if (EQ (entry1->overlay, entry2->overlay)) | |
4557 | result = entry1->after_string_p ? 1 : -1; | |
4558 | else | |
4559 | result = entry1->after_string_p ? -1 : 1; | |
4560 | } | |
5f5c8ee5 GM |
4561 | else if (entry1->after_string_p) |
4562 | /* After-strings sorted in order of decreasing priority. */ | |
4563 | result = entry2->priority - entry1->priority; | |
4564 | else | |
4565 | /* Before-strings sorted in order of increasing priority. */ | |
4566 | result = entry1->priority - entry2->priority; | |
4567 | ||
4568 | return result; | |
4569 | } | |
4570 | ||
4571 | ||
4572 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
4573 | current buffer position, or from CHARPOS if that is > 0. Set |
4574 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
4575 | |
4576 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
4577 | a time. On entry into load_overlay_strings, | |
4578 | IT->current.overlay_string_index gives the number of overlay | |
4579 | strings that have already been loaded by previous calls to this | |
4580 | function. | |
4581 | ||
2970b9be GM |
4582 | IT->add_overlay_start contains an additional overlay start |
4583 | position to consider for taking overlay strings from, if non-zero. | |
4584 | This position comes into play when the overlay has an `invisible' | |
4585 | property, and both before and after-strings. When we've skipped to | |
4586 | the end of the overlay, because of its `invisible' property, we | |
4587 | nevertheless want its before-string to appear. | |
4588 | IT->add_overlay_start will contain the overlay start position | |
4589 | in this case. | |
4590 | ||
5f5c8ee5 GM |
4591 | Overlay strings are sorted so that after-string strings come in |
4592 | front of before-string strings. Within before and after-strings, | |
4593 | strings are sorted by overlay priority. See also function | |
4594 | compare_overlay_entries. */ | |
2311178e | 4595 | |
5f5c8ee5 | 4596 | static void |
5a08cbaf | 4597 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 4598 | struct it *it; |
5a08cbaf | 4599 | int charpos; |
5f5c8ee5 GM |
4600 | { |
4601 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
b7253a3e SM |
4602 | Lisp_Object overlay, window, str, invisible; |
4603 | struct Lisp_Overlay *ov; | |
5f5c8ee5 GM |
4604 | int start, end; |
4605 | int size = 20; | |
cafafe0b | 4606 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
4607 | struct overlay_entry *entries |
4608 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
4609 | |
4610 | if (charpos <= 0) | |
4611 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
4612 | |
4613 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
4614 | `entries' which has size `size' and currently contains `n' | |
4615 | elements. AFTER_P non-zero means STRING is an after-string of | |
4616 | OVERLAY. */ | |
4617 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
4618 | do \ | |
4619 | { \ | |
4620 | Lisp_Object priority; \ | |
4621 | \ | |
4622 | if (n == size) \ | |
4623 | { \ | |
4624 | int new_size = 2 * size; \ | |
4625 | struct overlay_entry *old = entries; \ | |
4626 | entries = \ | |
4627 | (struct overlay_entry *) alloca (new_size \ | |
4628 | * sizeof *entries); \ | |
4629 | bcopy (old, entries, size * sizeof *entries); \ | |
4630 | size = new_size; \ | |
4631 | } \ | |
4632 | \ | |
4633 | entries[n].string = (STRING); \ | |
2970b9be | 4634 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 4635 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 4636 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
4637 | entries[n].after_string_p = (AFTER_P); \ |
4638 | ++n; \ | |
4639 | } \ | |
4640 | while (0) | |
4641 | ||
4642 | /* Process overlay before the overlay center. */ | |
b7253a3e | 4643 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
5f5c8ee5 | 4644 | { |
b7253a3e | 4645 | XSETMISC (overlay, ov); |
5f5c8ee5 GM |
4646 | xassert (OVERLAYP (overlay)); |
4647 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
4648 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2311178e | 4649 | |
cafafe0b | 4650 | if (end < charpos) |
5f5c8ee5 GM |
4651 | break; |
4652 | ||
4653 | /* Skip this overlay if it doesn't start or end at IT's current | |
4654 | position. */ | |
cafafe0b | 4655 | if (end != charpos && start != charpos) |
5f5c8ee5 | 4656 | continue; |
2311178e | 4657 | |
5f5c8ee5 GM |
4658 | /* Skip this overlay if it doesn't apply to IT->w. */ |
4659 | window = Foverlay_get (overlay, Qwindow); | |
4660 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
4661 | continue; | |
4662 | ||
cafafe0b GM |
4663 | /* If the text ``under'' the overlay is invisible, both before- |
4664 | and after-strings from this overlay are visible; start and | |
4665 | end position are indistinguishable. */ | |
4666 | invisible = Foverlay_get (overlay, Qinvisible); | |
4667 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
4668 | ||
5f5c8ee5 | 4669 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 4670 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 4671 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 4672 | && SCHARS (str)) |
5f5c8ee5 | 4673 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 4674 | |
5f5c8ee5 | 4675 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 4676 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 4677 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 4678 | && SCHARS (str)) |
5f5c8ee5 GM |
4679 | RECORD_OVERLAY_STRING (overlay, str, 1); |
4680 | } | |
2311178e | 4681 | |
5f5c8ee5 | 4682 | /* Process overlays after the overlay center. */ |
b7253a3e | 4683 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
5f5c8ee5 | 4684 | { |
b7253a3e | 4685 | XSETMISC (overlay, ov); |
5f5c8ee5 GM |
4686 | xassert (OVERLAYP (overlay)); |
4687 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
4688 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
4689 | ||
cafafe0b | 4690 | if (start > charpos) |
5f5c8ee5 | 4691 | break; |
2311178e | 4692 | |
5f5c8ee5 GM |
4693 | /* Skip this overlay if it doesn't start or end at IT's current |
4694 | position. */ | |
cafafe0b | 4695 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
4696 | continue; |
4697 | ||
4698 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
4699 | window = Foverlay_get (overlay, Qwindow); | |
4700 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
4701 | continue; | |
2311178e | 4702 | |
cafafe0b GM |
4703 | /* If the text ``under'' the overlay is invisible, it has a zero |
4704 | dimension, and both before- and after-strings apply. */ | |
4705 | invisible = Foverlay_get (overlay, Qinvisible); | |
4706 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
4707 | ||
5f5c8ee5 | 4708 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 4709 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 4710 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 4711 | && SCHARS (str)) |
5f5c8ee5 | 4712 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 4713 | |
5f5c8ee5 | 4714 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 4715 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 4716 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 4717 | && SCHARS (str)) |
5f5c8ee5 GM |
4718 | RECORD_OVERLAY_STRING (overlay, str, 1); |
4719 | } | |
4720 | ||
4721 | #undef RECORD_OVERLAY_STRING | |
2311178e | 4722 | |
5f5c8ee5 | 4723 | /* Sort entries. */ |
cafafe0b | 4724 | if (n > 1) |
2970b9be | 4725 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
4726 | |
4727 | /* Record the total number of strings to process. */ | |
4728 | it->n_overlay_strings = n; | |
4729 | ||
4730 | /* IT->current.overlay_string_index is the number of overlay strings | |
4731 | that have already been consumed by IT. Copy some of the | |
4732 | remaining overlay strings to IT->overlay_strings. */ | |
4733 | i = 0; | |
4734 | j = it->current.overlay_string_index; | |
4735 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
4736 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 4737 | |
5f5c8ee5 GM |
4738 | CHECK_IT (it); |
4739 | } | |
4740 | ||
4741 | ||
4742 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
4743 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
4744 | least one overlay string was found. */ | |
5f5c8ee5 GM |
4745 | |
4746 | static int | |
5a08cbaf | 4747 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 4748 | struct it *it; |
5a08cbaf | 4749 | int charpos; |
5f5c8ee5 GM |
4750 | { |
4751 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
4752 | process. This fills IT->overlay_strings with strings, and sets | |
4753 | IT->n_overlay_strings to the total number of strings to process. | |
4754 | IT->pos.overlay_string_index has to be set temporarily to zero | |
4755 | because load_overlay_strings needs this; it must be set to -1 | |
4756 | when no overlay strings are found because a zero value would | |
4757 | indicate a position in the first overlay string. */ | |
4758 | it->current.overlay_string_index = 0; | |
5a08cbaf | 4759 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
4760 | |
4761 | /* If we found overlay strings, set up IT to deliver display | |
4762 | elements from the first one. Otherwise set up IT to deliver | |
4763 | from current_buffer. */ | |
4764 | if (it->n_overlay_strings) | |
4765 | { | |
4766 | /* Make sure we know settings in current_buffer, so that we can | |
4767 | restore meaningful values when we're done with the overlay | |
4768 | strings. */ | |
4769 | compute_stop_pos (it); | |
4770 | xassert (it->face_id >= 0); | |
2311178e | 4771 | |
5f5c8ee5 GM |
4772 | /* Save IT's settings. They are restored after all overlay |
4773 | strings have been processed. */ | |
4774 | xassert (it->sp == 0); | |
4775 | push_it (it); | |
4776 | ||
4777 | /* Set up IT to deliver display elements from the first overlay | |
4778 | string. */ | |
4779 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 4780 | it->string = it->overlay_strings[0]; |
b2046df8 | 4781 | it->stop_charpos = 0; |
5f5c8ee5 | 4782 | xassert (STRINGP (it->string)); |
2051c264 | 4783 | it->end_charpos = SCHARS (it->string); |
d5db4077 | 4784 | it->multibyte_p = STRING_MULTIBYTE (it->string); |
a6f82cc4 | 4785 | it->method = GET_FROM_STRING; |
5f5c8ee5 GM |
4786 | } |
4787 | else | |
4788 | { | |
4789 | it->string = Qnil; | |
4790 | it->current.overlay_string_index = -1; | |
a6f82cc4 | 4791 | it->method = GET_FROM_BUFFER; |
5f5c8ee5 GM |
4792 | } |
4793 | ||
4794 | CHECK_IT (it); | |
4795 | ||
4796 | /* Value is non-zero if we found at least one overlay string. */ | |
4797 | return STRINGP (it->string); | |
4798 | } | |
4799 | ||
4800 | ||
4801 | \f | |
4802 | /*********************************************************************** | |
4803 | Saving and restoring state | |
4804 | ***********************************************************************/ | |
4805 | ||
4806 | /* Save current settings of IT on IT->stack. Called, for example, | |
4807 | before setting up IT for an overlay string, to be able to restore | |
4808 | IT's settings to what they were after the overlay string has been | |
4809 | processed. */ | |
4810 | ||
4811 | static void | |
4812 | push_it (it) | |
4813 | struct it *it; | |
4814 | { | |
4815 | struct iterator_stack_entry *p; | |
2311178e | 4816 | |
5f5c8ee5 GM |
4817 | xassert (it->sp < 2); |
4818 | p = it->stack + it->sp; | |
4819 | ||
4820 | p->stop_charpos = it->stop_charpos; | |
4821 | xassert (it->face_id >= 0); | |
4822 | p->face_id = it->face_id; | |
4823 | p->string = it->string; | |
4824 | p->pos = it->current; | |
4825 | p->end_charpos = it->end_charpos; | |
4826 | p->string_nchars = it->string_nchars; | |
4827 | p->area = it->area; | |
4828 | p->multibyte_p = it->multibyte_p; | |
e893970b | 4829 | p->slice = it->slice; |
5f5c8ee5 GM |
4830 | p->space_width = it->space_width; |
4831 | p->font_height = it->font_height; | |
4832 | p->voffset = it->voffset; | |
4833 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 4834 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
4835 | ++it->sp; |
4836 | } | |
4837 | ||
4838 | ||
4839 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
4840 | more overlay strings must be processed, and we return to delivering | |
4841 | display elements from a buffer, or when the end of a string from a | |
4842 | `display' property is reached and we return to delivering display | |
4843 | elements from an overlay string, or from a buffer. */ | |
4844 | ||
4845 | static void | |
4846 | pop_it (it) | |
4847 | struct it *it; | |
4848 | { | |
4849 | struct iterator_stack_entry *p; | |
2311178e | 4850 | |
5f5c8ee5 GM |
4851 | xassert (it->sp > 0); |
4852 | --it->sp; | |
4853 | p = it->stack + it->sp; | |
4854 | it->stop_charpos = p->stop_charpos; | |
4855 | it->face_id = p->face_id; | |
4856 | it->string = p->string; | |
4857 | it->current = p->pos; | |
4858 | it->end_charpos = p->end_charpos; | |
4859 | it->string_nchars = p->string_nchars; | |
4860 | it->area = p->area; | |
4861 | it->multibyte_p = p->multibyte_p; | |
e893970b | 4862 | it->slice = p->slice; |
5f5c8ee5 GM |
4863 | it->space_width = p->space_width; |
4864 | it->font_height = p->font_height; | |
4865 | it->voffset = p->voffset; | |
4866 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
4867 | } | |
4868 | ||
4869 | ||
4870 | \f | |
4871 | /*********************************************************************** | |
4872 | Moving over lines | |
4873 | ***********************************************************************/ | |
4874 | ||
4875 | /* Set IT's current position to the previous line start. */ | |
4876 | ||
4877 | static void | |
4878 | back_to_previous_line_start (it) | |
4879 | struct it *it; | |
4880 | { | |
4881 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
4882 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
4883 | } | |
4884 | ||
4885 | ||
cafafe0b | 4886 | /* Move IT to the next line start. |
2311178e | 4887 | |
cafafe0b GM |
4888 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if |
4889 | we skipped over part of the text (as opposed to moving the iterator | |
4890 | continuously over the text). Otherwise, don't change the value | |
4891 | of *SKIPPED_P. | |
2311178e | 4892 | |
cafafe0b GM |
4893 | Newlines may come from buffer text, overlay strings, or strings |
4894 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
4895 | simply use find_next_newline_no_quit. |
4896 | ||
4897 | Note that this function may not skip over invisible text that is so | |
4898 | because of text properties and immediately follows a newline. If | |
4899 | it would, function reseat_at_next_visible_line_start, when called | |
4900 | from set_iterator_to_next, would effectively make invisible | |
4901 | characters following a newline part of the wrong glyph row, which | |
4902 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 4903 | |
cafafe0b GM |
4904 | static int |
4905 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 4906 | struct it *it; |
cafafe0b | 4907 | int *skipped_p; |
5f5c8ee5 | 4908 | { |
54918e2b | 4909 | int old_selective, newline_found_p, n; |
cafafe0b GM |
4910 | const int MAX_NEWLINE_DISTANCE = 500; |
4911 | ||
0fd37545 GM |
4912 | /* If already on a newline, just consume it to avoid unintended |
4913 | skipping over invisible text below. */ | |
51695746 GM |
4914 | if (it->what == IT_CHARACTER |
4915 | && it->c == '\n' | |
4916 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
4917 | { |
4918 | set_iterator_to_next (it, 0); | |
a77dc1ec | 4919 | it->c = 0; |
0fd37545 GM |
4920 | return 1; |
4921 | } | |
4922 | ||
54918e2b | 4923 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
4924 | unnecessary because it's done by the caller, and (b) leads to an |
4925 | infinite recursion because next_element_from_ellipsis indirectly | |
4926 | calls this function. */ | |
54918e2b GM |
4927 | old_selective = it->selective; |
4928 | it->selective = 0; | |
4929 | ||
cafafe0b GM |
4930 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
4931 | from buffer text. */ | |
3aec8722 GM |
4932 | for (n = newline_found_p = 0; |
4933 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
4934 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 4935 | { |
8692ca92 | 4936 | if (!get_next_display_element (it)) |
d43be70c | 4937 | return 0; |
d02f1cb8 | 4938 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 4939 | set_iterator_to_next (it, 0); |
cafafe0b GM |
4940 | } |
4941 | ||
4942 | /* If we didn't find a newline near enough, see if we can use a | |
4943 | short-cut. */ | |
db0bb807 | 4944 | if (!newline_found_p) |
cafafe0b GM |
4945 | { |
4946 | int start = IT_CHARPOS (*it); | |
4947 | int limit = find_next_newline_no_quit (start, 1); | |
4948 | Lisp_Object pos; | |
4949 | ||
4950 | xassert (!STRINGP (it->string)); | |
4951 | ||
4952 | /* If there isn't any `display' property in sight, and no | |
4953 | overlays, we can just use the position of the newline in | |
4954 | buffer text. */ | |
4955 | if (it->stop_charpos >= limit | |
4956 | || ((pos = Fnext_single_property_change (make_number (start), | |
4957 | Qdisplay, | |
4958 | Qnil, make_number (limit)), | |
4959 | NILP (pos)) | |
4960 | && next_overlay_change (start) == ZV)) | |
4961 | { | |
4962 | IT_CHARPOS (*it) = limit; | |
4963 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
4964 | *skipped_p = newline_found_p = 1; | |
4965 | } | |
4966 | else | |
4967 | { | |
4968 | while (get_next_display_element (it) | |
4969 | && !newline_found_p) | |
4970 | { | |
4971 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
4972 | set_iterator_to_next (it, 0); | |
4973 | } | |
4974 | } | |
4975 | } | |
4976 | ||
54918e2b | 4977 | it->selective = old_selective; |
cafafe0b | 4978 | return newline_found_p; |
5f5c8ee5 GM |
4979 | } |
4980 | ||
4981 | ||
4982 | /* Set IT's current position to the previous visible line start. Skip | |
4983 | invisible text that is so either due to text properties or due to | |
4984 | selective display. Caution: this does not change IT->current_x and | |
4985 | IT->hpos. */ | |
4986 | ||
4987 | static void | |
4988 | back_to_previous_visible_line_start (it) | |
4989 | struct it *it; | |
4990 | { | |
6512b56d | 4991 | while (IT_CHARPOS (*it) > BEGV) |
5f5c8ee5 | 4992 | { |
6512b56d KS |
4993 | back_to_previous_line_start (it); |
4994 | if (IT_CHARPOS (*it) <= BEGV) | |
4995 | break; | |
5f5c8ee5 GM |
4996 | |
4997 | /* If selective > 0, then lines indented more than that values | |
4998 | are invisible. */ | |
4999 | if (it->selective > 0 | |
5000 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
a67e162b | 5001 | (double) it->selective)) /* iftc */ |
6512b56d | 5002 | continue; |
5f5c8ee5 | 5003 | |
6512b56d KS |
5004 | /* Check the newline before point for invisibility. */ |
5005 | { | |
5006 | Lisp_Object prop; | |
5007 | prop = Fget_char_property (make_number (IT_CHARPOS (*it) - 1), | |
6fc556fd | 5008 | Qinvisible, it->window); |
6512b56d KS |
5009 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
5010 | continue; | |
5011 | } | |
6c0afe12 | 5012 | |
6512b56d KS |
5013 | /* If newline has a display property that replaces the newline with something |
5014 | else (image or text), find start of overlay or interval and continue search | |
5015 | from that point. */ | |
e10ee30c KS |
5016 | if (IT_CHARPOS (*it) > BEGV) |
5017 | { | |
5018 | struct it it2 = *it; | |
5019 | int pos; | |
5020 | int beg, end; | |
5021 | Lisp_Object val, overlay; | |
5022 | ||
5023 | pos = --IT_CHARPOS (it2); | |
5024 | --IT_BYTEPOS (it2); | |
5025 | it2.sp = 0; | |
5026 | if (handle_display_prop (&it2) == HANDLED_RETURN | |
5027 | && !NILP (val = get_char_property_and_overlay | |
5028 | (make_number (pos), Qdisplay, Qnil, &overlay)) | |
5029 | && (OVERLAYP (overlay) | |
5030 | ? (beg = OVERLAY_POSITION (OVERLAY_START (overlay))) | |
5031 | : get_property_and_range (pos, Qdisplay, &val, &beg, &end, Qnil))) | |
5032 | { | |
5033 | if (beg < BEGV) | |
5034 | beg = BEGV; | |
5035 | IT_CHARPOS (*it) = beg; | |
5036 | IT_BYTEPOS (*it) = buf_charpos_to_bytepos (current_buffer, beg); | |
5037 | continue; | |
5038 | } | |
5039 | } | |
5040 | ||
6512b56d | 5041 | break; |
5f5c8ee5 GM |
5042 | } |
5043 | ||
5044 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5045 | xassert (IT_CHARPOS (*it) == BEGV | |
5046 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
5047 | CHECK_IT (it); | |
5048 | } | |
5049 | ||
5050 | ||
5051 | /* Reseat iterator IT at the previous visible line start. Skip | |
5052 | invisible text that is so either due to text properties or due to | |
5053 | selective display. At the end, update IT's overlay information, | |
5054 | face information etc. */ | |
5055 | ||
0b2e177e | 5056 | void |
5f5c8ee5 GM |
5057 | reseat_at_previous_visible_line_start (it) |
5058 | struct it *it; | |
5059 | { | |
5060 | back_to_previous_visible_line_start (it); | |
5061 | reseat (it, it->current.pos, 1); | |
5062 | CHECK_IT (it); | |
5063 | } | |
5064 | ||
5065 | ||
5066 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
5067 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
5068 | preceding the line start. Skip over invisible text that is so | |
5069 | because of selective display. Compute faces, overlays etc at the | |
5070 | new position. Note that this function does not skip over text that | |
5071 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
5072 | |
5073 | static void | |
312246d1 | 5074 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 5075 | struct it *it; |
312246d1 | 5076 | int on_newline_p; |
5f5c8ee5 | 5077 | { |
cafafe0b GM |
5078 | int newline_found_p, skipped_p = 0; |
5079 | ||
5080 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
5081 | ||
5082 | /* Skip over lines that are invisible because they are indented | |
5083 | more than the value of IT->selective. */ | |
5084 | if (it->selective > 0) | |
5085 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 5086 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
a67e162b | 5087 | (double) it->selective)) /* iftc */ |
a77dc1ec | 5088 | { |
ad5afd5b KS |
5089 | xassert (IT_BYTEPOS (*it) == BEGV |
5090 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
a77dc1ec GM |
5091 | newline_found_p = forward_to_next_line_start (it, &skipped_p); |
5092 | } | |
cafafe0b GM |
5093 | |
5094 | /* Position on the newline if that's what's requested. */ | |
5095 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 5096 | { |
cafafe0b | 5097 | if (STRINGP (it->string)) |
5f5c8ee5 | 5098 | { |
cafafe0b GM |
5099 | if (IT_STRING_CHARPOS (*it) > 0) |
5100 | { | |
5101 | --IT_STRING_CHARPOS (*it); | |
5102 | --IT_STRING_BYTEPOS (*it); | |
5103 | } | |
5f5c8ee5 | 5104 | } |
cafafe0b | 5105 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
5106 | { |
5107 | --IT_CHARPOS (*it); | |
cafafe0b GM |
5108 | --IT_BYTEPOS (*it); |
5109 | reseat (it, it->current.pos, 0); | |
312246d1 | 5110 | } |
5f5c8ee5 | 5111 | } |
cafafe0b GM |
5112 | else if (skipped_p) |
5113 | reseat (it, it->current.pos, 0); | |
2311178e | 5114 | |
5f5c8ee5 GM |
5115 | CHECK_IT (it); |
5116 | } | |
5117 | ||
5118 | ||
5119 | \f | |
5120 | /*********************************************************************** | |
5121 | Changing an iterator's position | |
5122 | ***********************************************************************/ | |
5123 | ||
5124 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
5125 | is non-zero, always check for text properties at the new position. | |
5126 | Otherwise, text properties are only looked up if POS >= | |
5127 | IT->check_charpos of a property. */ | |
5128 | ||
5129 | static void | |
5130 | reseat (it, pos, force_p) | |
5131 | struct it *it; | |
5132 | struct text_pos pos; | |
5133 | int force_p; | |
5134 | { | |
5135 | int original_pos = IT_CHARPOS (*it); | |
5136 | ||
5137 | reseat_1 (it, pos, 0); | |
5138 | ||
5139 | /* Determine where to check text properties. Avoid doing it | |
5140 | where possible because text property lookup is very expensive. */ | |
5141 | if (force_p | |
5142 | || CHARPOS (pos) > it->stop_charpos | |
5143 | || CHARPOS (pos) < original_pos) | |
5144 | handle_stop (it); | |
5145 | ||
5146 | CHECK_IT (it); | |
5147 | } | |
5148 | ||
5149 | ||
5150 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
5151 | IT->stop_pos to POS, also. */ | |
5152 | ||
5153 | static void | |
5154 | reseat_1 (it, pos, set_stop_p) | |
5155 | struct it *it; | |
5156 | struct text_pos pos; | |
5157 | int set_stop_p; | |
5158 | { | |
5159 | /* Don't call this function when scanning a C string. */ | |
5160 | xassert (it->s == NULL); | |
5161 | ||
5162 | /* POS must be a reasonable value. */ | |
5163 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
5164 | ||
5165 | it->current.pos = it->position = pos; | |
5166 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 5167 | it->end_charpos = ZV; |
5f5c8ee5 GM |
5168 | it->dpvec = NULL; |
5169 | it->current.dpvec_index = -1; | |
5170 | it->current.overlay_string_index = -1; | |
5171 | IT_STRING_CHARPOS (*it) = -1; | |
5172 | IT_STRING_BYTEPOS (*it) = -1; | |
5173 | it->string = Qnil; | |
a6f82cc4 | 5174 | it->method = GET_FROM_BUFFER; |
5905025c RS |
5175 | /* RMS: I added this to fix a bug in move_it_vertically_backward |
5176 | where it->area continued to relate to the starting point | |
5177 | for the backward motion. Bug report from | |
5178 | Nick Roberts <nick@nick.uklinux.net> on 19 May 2003. | |
5179 | However, I am not sure whether reseat still does the right thing | |
5180 | in general after this change. */ | |
5181 | it->area = TEXT_AREA; | |
06fd3792 | 5182 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 5183 | it->sp = 0; |
4aad61f8 | 5184 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
5185 | |
5186 | if (set_stop_p) | |
5187 | it->stop_charpos = CHARPOS (pos); | |
5188 | } | |
5189 | ||
5190 | ||
5191 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
5192 | If S is non-null, it is a C string to iterate over. Otherwise, | |
5193 | STRING gives a Lisp string to iterate over. | |
2311178e | 5194 | |
5f5c8ee5 GM |
5195 | If PRECISION > 0, don't return more then PRECISION number of |
5196 | characters from the string. | |
5197 | ||
5198 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
5199 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
5200 | field width. | |
5201 | ||
5202 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
5203 | MULTIBYTE > 0 means enable it, | |
5204 | MULTIBYTE < 0 means use IT->multibyte_p. | |
5205 | ||
5206 | IT must be initialized via a prior call to init_iterator before | |
5207 | calling this function. */ | |
5208 | ||
5209 | static void | |
5210 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
5211 | struct it *it; | |
5212 | unsigned char *s; | |
5213 | Lisp_Object string; | |
5214 | int charpos; | |
5215 | int precision, field_width, multibyte; | |
5216 | { | |
5217 | /* No region in strings. */ | |
5218 | it->region_beg_charpos = it->region_end_charpos = -1; | |
5219 | ||
5220 | /* No text property checks performed by default, but see below. */ | |
5221 | it->stop_charpos = -1; | |
5222 | ||
5223 | /* Set iterator position and end position. */ | |
5224 | bzero (&it->current, sizeof it->current); | |
5225 | it->current.overlay_string_index = -1; | |
5226 | it->current.dpvec_index = -1; | |
5f5c8ee5 | 5227 | xassert (charpos >= 0); |
2311178e | 5228 | |
e719f5ae GM |
5229 | /* If STRING is specified, use its multibyteness, otherwise use the |
5230 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 5231 | if (multibyte >= 0) |
5f5c8ee5 | 5232 | it->multibyte_p = multibyte > 0; |
2311178e | 5233 | |
5f5c8ee5 GM |
5234 | if (s == NULL) |
5235 | { | |
5236 | xassert (STRINGP (string)); | |
5237 | it->string = string; | |
5238 | it->s = NULL; | |
2051c264 | 5239 | it->end_charpos = it->string_nchars = SCHARS (string); |
a6f82cc4 | 5240 | it->method = GET_FROM_STRING; |
5f5c8ee5 GM |
5241 | it->current.string_pos = string_pos (charpos, string); |
5242 | } | |
5243 | else | |
5244 | { | |
5245 | it->s = s; | |
5246 | it->string = Qnil; | |
5247 | ||
5248 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
5249 | for displaying C strings. */ | |
5250 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
5251 | if (it->multibyte_p) | |
5252 | { | |
5253 | it->current.pos = c_string_pos (charpos, s, 1); | |
5254 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
5255 | } | |
5256 | else | |
5257 | { | |
5258 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
5259 | it->end_charpos = it->string_nchars = strlen (s); | |
5260 | } | |
2311178e | 5261 | |
a6f82cc4 | 5262 | it->method = GET_FROM_C_STRING; |
5f5c8ee5 GM |
5263 | } |
5264 | ||
5265 | /* PRECISION > 0 means don't return more than PRECISION characters | |
5266 | from the string. */ | |
5267 | if (precision > 0 && it->end_charpos - charpos > precision) | |
5268 | it->end_charpos = it->string_nchars = charpos + precision; | |
5269 | ||
5270 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
5271 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
5272 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
5273 | padding with `-' at the end of a mode line. */ | |
5274 | if (field_width < 0) | |
5275 | field_width = INFINITY; | |
5276 | if (field_width > it->end_charpos - charpos) | |
5277 | it->end_charpos = charpos + field_width; | |
5278 | ||
5279 | /* Use the standard display table for displaying strings. */ | |
5280 | if (DISP_TABLE_P (Vstandard_display_table)) | |
5281 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
5282 | ||
5283 | it->stop_charpos = charpos; | |
5284 | CHECK_IT (it); | |
5285 | } | |
5286 | ||
5287 | ||
5288 | \f | |
5289 | /*********************************************************************** | |
5290 | Iteration | |
5291 | ***********************************************************************/ | |
5292 | ||
a6f82cc4 KS |
5293 | /* Map enum it_method value to corresponding next_element_from_* function. */ |
5294 | ||
5295 | static int (* get_next_element[NUM_IT_METHODS]) P_ ((struct it *it)) = | |
5296 | { | |
5297 | next_element_from_buffer, | |
5298 | next_element_from_display_vector, | |
5299 | next_element_from_composition, | |
5300 | next_element_from_string, | |
5301 | next_element_from_c_string, | |
5302 | next_element_from_image, | |
5303 | next_element_from_stretch | |
5304 | }; | |
5305 | ||
5306 | ||
5f5c8ee5 GM |
5307 | /* Load IT's display element fields with information about the next |
5308 | display element from the current position of IT. Value is zero if | |
5309 | end of buffer (or C string) is reached. */ | |
5310 | ||
5311 | int | |
5312 | get_next_display_element (it) | |
5313 | struct it *it; | |
5314 | { | |
7d0393cf | 5315 | /* Non-zero means that we found a display element. Zero means that |
5f5c8ee5 GM |
5316 | we hit the end of what we iterate over. Performance note: the |
5317 | function pointer `method' used here turns out to be faster than | |
5318 | using a sequence of if-statements. */ | |
064fd8ec KS |
5319 | int success_p; |
5320 | ||
5321 | get_next: | |
a6f82cc4 | 5322 | success_p = (*get_next_element[it->method]) (it); |
5f5c8ee5 GM |
5323 | |
5324 | if (it->what == IT_CHARACTER) | |
5325 | { | |
5326 | /* Map via display table or translate control characters. | |
5327 | IT->c, IT->len etc. have been set to the next character by | |
5328 | the function call above. If we have a display table, and it | |
5329 | contains an entry for IT->c, translate it. Don't do this if | |
5330 | IT->c itself comes from a display table, otherwise we could | |
5331 | end up in an infinite recursion. (An alternative could be to | |
5332 | count the recursion depth of this function and signal an | |
5333 | error when a certain maximum depth is reached.) Is it worth | |
5334 | it? */ | |
5335 | if (success_p && it->dpvec == NULL) | |
5336 | { | |
5337 | Lisp_Object dv; | |
5338 | ||
5339 | if (it->dp | |
5340 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
5341 | VECTORP (dv))) | |
5342 | { | |
5343 | struct Lisp_Vector *v = XVECTOR (dv); | |
5344 | ||
5345 | /* Return the first character from the display table | |
5346 | entry, if not empty. If empty, don't display the | |
5347 | current character. */ | |
5348 | if (v->size) | |
5349 | { | |
5350 | it->dpvec_char_len = it->len; | |
5351 | it->dpvec = v->contents; | |
5352 | it->dpend = v->contents + v->size; | |
5353 | it->current.dpvec_index = 0; | |
fe1c2006 | 5354 | it->dpvec_face_id = -1; |
064fd8ec | 5355 | it->saved_face_id = it->face_id; |
a6f82cc4 | 5356 | it->method = GET_FROM_DISPLAY_VECTOR; |
f323e507 | 5357 | it->ellipsis_p = 0; |
7eee47cc GM |
5358 | } |
5359 | else | |
5360 | { | |
5361 | set_iterator_to_next (it, 0); | |
5f5c8ee5 | 5362 | } |
064fd8ec | 5363 | goto get_next; |
5f5c8ee5 GM |
5364 | } |
5365 | ||
5366 | /* Translate control characters into `\003' or `^C' form. | |
5367 | Control characters coming from a display table entry are | |
5368 | currently not translated because we use IT->dpvec to hold | |
5369 | the translation. This could easily be changed but I | |
197516c2 KH |
5370 | don't believe that it is worth doing. |
5371 | ||
fa831cf8 KH |
5372 | If it->multibyte_p is nonzero, eight-bit characters and |
5373 | non-printable multibyte characters are also translated to | |
5374 | octal form. | |
5375 | ||
5376 | If it->multibyte_p is zero, eight-bit characters that | |
5377 | don't have corresponding multibyte char code are also | |
5378 | translated to octal form. */ | |
ba197fe6 | 5379 | else if ((it->c < ' ' |
5f5c8ee5 | 5380 | && (it->area != TEXT_AREA |
0b2e177e | 5381 | /* In mode line, treat \n like other crl chars. */ |
6407f07b | 5382 | || (it->c != '\t' |
0b2e177e | 5383 | && it->glyph_row && it->glyph_row->mode_line_p) |
c6e89d6c | 5384 | || (it->c != '\n' && it->c != '\t'))) |
fa831cf8 KH |
5385 | || (it->multibyte_p |
5386 | ? ((it->c >= 127 | |
5387 | && it->len == 1) | |
6df99033 | 5388 | || !CHAR_PRINTABLE_P (it->c) |
9c69e6e1 | 5389 | || (!NILP (Vnobreak_char_display) |
44e582b8 JL |
5390 | && (it->c == 0x8a0 || it->c == 0x8ad |
5391 | || it->c == 0x920 || it->c == 0x92d | |
5392 | || it->c == 0xe20 || it->c == 0xe2d | |
5393 | || it->c == 0xf20 || it->c == 0xf2d))) | |
ba197fe6 | 5394 | : (it->c >= 127 |
170b174c KH |
5395 | && (!unibyte_display_via_language_environment |
5396 | || it->c == unibyte_char_to_multibyte (it->c))))) | |
5f5c8ee5 GM |
5397 | { |
5398 | /* IT->c is a control character which must be displayed | |
5399 | either as '\003' or as `^C' where the '\\' and '^' | |
5400 | can be defined in the display table. Fill | |
5401 | IT->ctl_chars with glyphs for what we have to | |
5402 | display. Then, set IT->dpvec to these glyphs. */ | |
5403 | GLYPH g; | |
064fd8ec | 5404 | int ctl_len; |
1868c863 | 5405 | int face_id, lface_id = 0 ; |
fe1c2006 | 5406 | GLYPH escape_glyph; |
5f5c8ee5 | 5407 | |
547d2b37 RS |
5408 | /* Handle control characters with ^. */ |
5409 | ||
54c85a23 | 5410 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 | 5411 | { |
1868c863 | 5412 | g = '^'; /* default glyph for Control */ |
5f5c8ee5 GM |
5413 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ |
5414 | if (it->dp | |
5415 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
5416 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
fe1c2006 KS |
5417 | { |
5418 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
5419 | lface_id = FAST_GLYPH_FACE (g); | |
1868c863 KS |
5420 | } |
5421 | if (lface_id) | |
5422 | { | |
5423 | g = FAST_GLYPH_CHAR (g); | |
5424 | face_id = merge_faces (it->f, Qt, lface_id, | |
5425 | it->face_id); | |
fe1c2006 | 5426 | } |
5f5c8ee5 | 5427 | else |
fe1c2006 KS |
5428 | { |
5429 | /* Merge the escape-glyph face into the current face. */ | |
539f1217 KS |
5430 | face_id = merge_faces (it->f, Qescape_glyph, 0, |
5431 | it->face_id); | |
fe1c2006 | 5432 | } |
5f5c8ee5 | 5433 | |
fe1c2006 KS |
5434 | XSETINT (it->ctl_chars[0], g); |
5435 | g = it->c ^ 0100; | |
5f5c8ee5 | 5436 | XSETINT (it->ctl_chars[1], g); |
064fd8ec | 5437 | ctl_len = 2; |
fe1c2006 | 5438 | goto display_control; |
5f5c8ee5 | 5439 | } |
fe1c2006 | 5440 | |
547d2b37 RS |
5441 | /* Handle non-break space in the mode where it only gets |
5442 | highlighting. */ | |
5443 | ||
9c69e6e1 | 5444 | if (EQ (Vnobreak_char_display, Qt) |
547d2b37 RS |
5445 | && (it->c == 0x8a0 || it->c == 0x920 |
5446 | || it->c == 0xe20 || it->c == 0xf20)) | |
5447 | { | |
5448 | /* Merge the no-break-space face into the current face. */ | |
9c69e6e1 | 5449 | face_id = merge_faces (it->f, Qnobreak_space, 0, |
547d2b37 RS |
5450 | it->face_id); |
5451 | ||
5452 | g = it->c = ' '; | |
5453 | XSETINT (it->ctl_chars[0], g); | |
5454 | ctl_len = 1; | |
5455 | goto display_control; | |
5456 | } | |
5457 | ||
5458 | /* Handle sequences that start with the "escape glyph". */ | |
5459 | ||
5460 | /* the default escape glyph is \. */ | |
5461 | escape_glyph = '\\'; | |
5462 | ||
fe1c2006 KS |
5463 | if (it->dp |
5464 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
5465 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
6df99033 | 5466 | { |
fe1c2006 KS |
5467 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5468 | lface_id = FAST_GLYPH_FACE (escape_glyph); | |
1868c863 KS |
5469 | } |
5470 | if (lface_id) | |
5471 | { | |
547d2b37 RS |
5472 | /* The display table specified a face. |
5473 | Merge it into face_id and also into escape_glyph. */ | |
1868c863 KS |
5474 | escape_glyph = FAST_GLYPH_CHAR (escape_glyph); |
5475 | face_id = merge_faces (it->f, Qt, lface_id, | |
5476 | it->face_id); | |
fe1c2006 KS |
5477 | } |
5478 | else | |
5479 | { | |
5480 | /* Merge the escape-glyph face into the current face. */ | |
539f1217 KS |
5481 | face_id = merge_faces (it->f, Qescape_glyph, 0, |
5482 | it->face_id); | |
fe1c2006 | 5483 | } |
6df99033 | 5484 | |
547d2b37 RS |
5485 | /* Handle soft hyphens in the mode where they only get |
5486 | highlighting. */ | |
44e582b8 | 5487 | |
9c69e6e1 | 5488 | if (EQ (Vnobreak_char_display, Qt) |
547d2b37 RS |
5489 | && (it->c == 0x8ad || it->c == 0x92d |
5490 | || it->c == 0xe2d || it->c == 0xf2d)) | |
5491 | { | |
5492 | g = it->c = '-'; | |
44e582b8 JL |
5493 | XSETINT (it->ctl_chars[0], g); |
5494 | ctl_len = 1; | |
5495 | goto display_control; | |
5496 | } | |
5497 | ||
547d2b37 RS |
5498 | /* Handle non-break space and soft hyphen |
5499 | with the escape glyph. */ | |
5500 | ||
5501 | if (it->c == 0x8a0 || it->c == 0x8ad | |
5502 | || it->c == 0x920 || it->c == 0x92d | |
5503 | || it->c == 0xe20 || it->c == 0xe2d | |
5504 | || it->c == 0xf20 || it->c == 0xf2d) | |
44e582b8 | 5505 | { |
547d2b37 RS |
5506 | XSETINT (it->ctl_chars[0], escape_glyph); |
5507 | g = it->c = ((it->c & 0xf) == 0 ? ' ' : '-'); | |
5508 | XSETINT (it->ctl_chars[1], g); | |
5509 | ctl_len = 2; | |
fe1c2006 | 5510 | goto display_control; |
6df99033 | 5511 | } |
197516c2 | 5512 | |
fe1c2006 KS |
5513 | { |
5514 | unsigned char str[MAX_MULTIBYTE_LENGTH]; | |
5515 | int len; | |
5516 | int i; | |
197516c2 | 5517 | |
fe1c2006 KS |
5518 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
5519 | if (SINGLE_BYTE_CHAR_P (it->c)) | |
5520 | str[0] = it->c, len = 1; | |
5521 | else | |
5522 | { | |
5523 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
5524 | if (len < 0) | |
5525 | { | |
5526 | /* It's an invalid character, which shouldn't | |
5527 | happen actually, but due to bugs it may | |
5528 | happen. Let's print the char as is, there's | |
5529 | not much meaningful we can do with it. */ | |
ea9dd091 GM |
5530 | str[0] = it->c; |
5531 | str[1] = it->c >> 8; | |
5532 | str[2] = it->c >> 16; | |
5533 | str[3] = it->c >> 24; | |
5534 | len = 4; | |
5535 | } | |
5536 | } | |
c5924f47 | 5537 | |
fe1c2006 KS |
5538 | for (i = 0; i < len; i++) |
5539 | { | |
5540 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
5541 | /* Insert three more glyphs into IT->ctl_chars for | |
5542 | the octal display of the character. */ | |
5543 | g = ((str[i] >> 6) & 7) + '0'; | |
5544 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
5545 | g = ((str[i] >> 3) & 7) + '0'; | |
5546 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
5547 | g = (str[i] & 7) + '0'; | |
5548 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
5549 | } | |
5550 | ctl_len = len * 4; | |
5551 | } | |
064fd8ec | 5552 | |
fe1c2006 | 5553 | display_control: |
064fd8ec KS |
5554 | /* Set up IT->dpvec and return first character from it. */ |
5555 | it->dpvec_char_len = it->len; | |
5556 | it->dpvec = it->ctl_chars; | |
5557 | it->dpend = it->dpvec + ctl_len; | |
5558 | it->current.dpvec_index = 0; | |
fe1c2006 | 5559 | it->dpvec_face_id = face_id; |
064fd8ec | 5560 | it->saved_face_id = it->face_id; |
a6f82cc4 | 5561 | it->method = GET_FROM_DISPLAY_VECTOR; |
f323e507 | 5562 | it->ellipsis_p = 0; |
064fd8ec | 5563 | goto get_next; |
5f5c8ee5 GM |
5564 | } |
5565 | } | |
5566 | ||
980806b6 KH |
5567 | /* Adjust face id for a multibyte character. There are no |
5568 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
5569 | if (it->multibyte_p |
5570 | && success_p | |
980806b6 | 5571 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 5572 | { |
980806b6 KH |
5573 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
5574 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
5575 | } |
5576 | } | |
5577 | ||
5578 | /* Is this character the last one of a run of characters with | |
5579 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
5580 | if (it->face_box_p | |
5581 | && it->s == NULL) | |
5582 | { | |
5583 | int face_id; | |
5584 | struct face *face; | |
5585 | ||
5586 | it->end_of_box_run_p | |
5587 | = ((face_id = face_after_it_pos (it), | |
5588 | face_id != it->face_id) | |
5589 | && (face = FACE_FROM_ID (it->f, face_id), | |
5590 | face->box == FACE_NO_BOX)); | |
5591 | } | |
5592 | ||
5593 | /* Value is 0 if end of buffer or string reached. */ | |
5594 | return success_p; | |
5595 | } | |
5596 | ||
5597 | ||
5598 | /* Move IT to the next display element. | |
5599 | ||
cafafe0b GM |
5600 | RESEAT_P non-zero means if called on a newline in buffer text, |
5601 | skip to the next visible line start. | |
5602 | ||
5f5c8ee5 GM |
5603 | Functions get_next_display_element and set_iterator_to_next are |
5604 | separate because I find this arrangement easier to handle than a | |
5605 | get_next_display_element function that also increments IT's | |
5606 | position. The way it is we can first look at an iterator's current | |
5607 | display element, decide whether it fits on a line, and if it does, | |
5608 | increment the iterator position. The other way around we probably | |
5609 | would either need a flag indicating whether the iterator has to be | |
5610 | incremented the next time, or we would have to implement a | |
5611 | decrement position function which would not be easy to write. */ | |
5612 | ||
5613 | void | |
cafafe0b | 5614 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 5615 | struct it *it; |
cafafe0b | 5616 | int reseat_p; |
5f5c8ee5 | 5617 | { |
483de32b GM |
5618 | /* Reset flags indicating start and end of a sequence of characters |
5619 | with box. Reset them at the start of this function because | |
5620 | moving the iterator to a new position might set them. */ | |
5621 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
2311178e | 5622 | |
a6f82cc4 | 5623 | switch (it->method) |
5f5c8ee5 | 5624 | { |
a6f82cc4 | 5625 | case GET_FROM_BUFFER: |
5f5c8ee5 GM |
5626 | /* The current display element of IT is a character from |
5627 | current_buffer. Advance in the buffer, and maybe skip over | |
5628 | invisible lines that are so because of selective display. */ | |
cafafe0b | 5629 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 5630 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5631 | else |
5632 | { | |
5633 | xassert (it->len != 0); | |
5634 | IT_BYTEPOS (*it) += it->len; | |
5635 | IT_CHARPOS (*it) += 1; | |
5636 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
5637 | } | |
a6f82cc4 KS |
5638 | break; |
5639 | ||
5640 | case GET_FROM_COMPOSITION: | |
5641 | xassert (it->cmp_id >= 0 && it->cmp_id < n_compositions); | |
260a86a0 KH |
5642 | if (STRINGP (it->string)) |
5643 | { | |
5644 | IT_STRING_BYTEPOS (*it) += it->len; | |
5645 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
a6f82cc4 | 5646 | it->method = GET_FROM_STRING; |
260a86a0 KH |
5647 | goto consider_string_end; |
5648 | } | |
5649 | else | |
5650 | { | |
5651 | IT_BYTEPOS (*it) += it->len; | |
5652 | IT_CHARPOS (*it) += it->cmp_len; | |
a6f82cc4 | 5653 | it->method = GET_FROM_BUFFER; |
260a86a0 | 5654 | } |
a6f82cc4 KS |
5655 | break; |
5656 | ||
5657 | case GET_FROM_C_STRING: | |
5f5c8ee5 GM |
5658 | /* Current display element of IT is from a C string. */ |
5659 | IT_BYTEPOS (*it) += it->len; | |
5660 | IT_CHARPOS (*it) += 1; | |
a6f82cc4 KS |
5661 | break; |
5662 | ||
5663 | case GET_FROM_DISPLAY_VECTOR: | |
5f5c8ee5 GM |
5664 | /* Current display element of IT is from a display table entry. |
5665 | Advance in the display table definition. Reset it to null if | |
5666 | end reached, and continue with characters from buffers/ | |
5667 | strings. */ | |
5668 | ++it->current.dpvec_index; | |
286bcbc9 | 5669 | |
980806b6 KH |
5670 | /* Restore face of the iterator to what they were before the |
5671 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 5672 | it->face_id = it->saved_face_id; |
2311178e | 5673 | |
5f5c8ee5 GM |
5674 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
5675 | { | |
5676 | if (it->s) | |
a6f82cc4 | 5677 | it->method = GET_FROM_C_STRING; |
5f5c8ee5 | 5678 | else if (STRINGP (it->string)) |
a6f82cc4 | 5679 | it->method = GET_FROM_STRING; |
5f5c8ee5 | 5680 | else |
a6f82cc4 | 5681 | it->method = GET_FROM_BUFFER; |
5f5c8ee5 GM |
5682 | |
5683 | it->dpvec = NULL; | |
5684 | it->current.dpvec_index = -1; | |
5685 | ||
312246d1 GM |
5686 | /* Skip over characters which were displayed via IT->dpvec. */ |
5687 | if (it->dpvec_char_len < 0) | |
5688 | reseat_at_next_visible_line_start (it, 1); | |
5689 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 | 5690 | { |
310316cf KS |
5691 | if (it->method == GET_FROM_STRING |
5692 | && it->n_overlay_strings > 0) | |
5693 | it->ignore_overlay_strings_at_pos_p = 1; | |
5f5c8ee5 | 5694 | it->len = it->dpvec_char_len; |
cafafe0b | 5695 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 | 5696 | } |
60227bf4 KS |
5697 | |
5698 | /* Recheck faces after display vector */ | |
5699 | it->stop_charpos = IT_CHARPOS (*it); | |
5f5c8ee5 | 5700 | } |
a6f82cc4 KS |
5701 | break; |
5702 | ||
5703 | case GET_FROM_STRING: | |
5f5c8ee5 GM |
5704 | /* Current display element is a character from a Lisp string. */ |
5705 | xassert (it->s == NULL && STRINGP (it->string)); | |
5706 | IT_STRING_BYTEPOS (*it) += it->len; | |
5707 | IT_STRING_CHARPOS (*it) += 1; | |
2311178e | 5708 | |
5f5c8ee5 GM |
5709 | consider_string_end: |
5710 | ||
5711 | if (it->current.overlay_string_index >= 0) | |
5712 | { | |
5713 | /* IT->string is an overlay string. Advance to the | |
5714 | next, if there is one. */ | |
2051c264 | 5715 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
5716 | next_overlay_string (it); |
5717 | } | |
5718 | else | |
5719 | { | |
5720 | /* IT->string is not an overlay string. If we reached | |
5721 | its end, and there is something on IT->stack, proceed | |
5722 | with what is on the stack. This can be either another | |
5723 | string, this time an overlay string, or a buffer. */ | |
2051c264 | 5724 | if (IT_STRING_CHARPOS (*it) == SCHARS (it->string) |
5f5c8ee5 GM |
5725 | && it->sp > 0) |
5726 | { | |
5727 | pop_it (it); | |
a6f82cc4 | 5728 | if (STRINGP (it->string)) |
b2046df8 | 5729 | goto consider_string_end; |
a6f82cc4 | 5730 | it->method = GET_FROM_BUFFER; |
5f5c8ee5 GM |
5731 | } |
5732 | } | |
a6f82cc4 KS |
5733 | break; |
5734 | ||
5735 | case GET_FROM_IMAGE: | |
5736 | case GET_FROM_STRETCH: | |
5f5c8ee5 GM |
5737 | /* The position etc with which we have to proceed are on |
5738 | the stack. The position may be at the end of a string, | |
5739 | if the `display' property takes up the whole string. */ | |
a6f82cc4 | 5740 | xassert (it->sp > 0); |
5f5c8ee5 GM |
5741 | pop_it (it); |
5742 | it->image_id = 0; | |
5743 | if (STRINGP (it->string)) | |
5744 | { | |
a6f82cc4 | 5745 | it->method = GET_FROM_STRING; |
5f5c8ee5 GM |
5746 | goto consider_string_end; |
5747 | } | |
a6f82cc4 KS |
5748 | it->method = GET_FROM_BUFFER; |
5749 | break; | |
5750 | ||
5751 | default: | |
5752 | /* There are no other methods defined, so this should be a bug. */ | |
5753 | abort (); | |
5f5c8ee5 | 5754 | } |
5f5c8ee5 | 5755 | |
a6f82cc4 | 5756 | xassert (it->method != GET_FROM_STRING |
5f5c8ee5 GM |
5757 | || (STRINGP (it->string) |
5758 | && IT_STRING_CHARPOS (*it) >= 0)); | |
5759 | } | |
5760 | ||
5f5c8ee5 GM |
5761 | /* Load IT's display element fields with information about the next |
5762 | display element which comes from a display table entry or from the | |
5763 | result of translating a control character to one of the forms `^C' | |
064fd8ec KS |
5764 | or `\003'. |
5765 | ||
5766 | IT->dpvec holds the glyphs to return as characters. | |
5767 | IT->saved_face_id holds the face id before the display vector-- | |
5768 | it is restored into IT->face_idin set_iterator_to_next. */ | |
5f5c8ee5 GM |
5769 | |
5770 | static int | |
5771 | next_element_from_display_vector (it) | |
5772 | struct it *it; | |
5773 | { | |
5774 | /* Precondition. */ | |
5775 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
5776 | ||
62af9c24 KS |
5777 | it->face_id = it->saved_face_id; |
5778 | ||
5f5c8ee5 GM |
5779 | if (INTEGERP (*it->dpvec) |
5780 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
5781 | { | |
5f5c8ee5 GM |
5782 | GLYPH g; |
5783 | ||
5784 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
5785 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 5786 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
5787 | |
5788 | /* The entry may contain a face id to use. Such a face id is | |
5789 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 5790 | zero means no face is specified. */ |
fe1c2006 KS |
5791 | if (it->dpvec_face_id >= 0) |
5792 | it->face_id = it->dpvec_face_id; | |
5793 | else | |
5f5c8ee5 | 5794 | { |
fe1c2006 | 5795 | int lface_id = FAST_GLYPH_FACE (g); |
539f1217 KS |
5796 | if (lface_id > 0) |
5797 | it->face_id = merge_faces (it->f, Qt, lface_id, | |
5798 | it->saved_face_id); | |
5f5c8ee5 GM |
5799 | } |
5800 | } | |
5801 | else | |
5802 | /* Display table entry is invalid. Return a space. */ | |
5803 | it->c = ' ', it->len = 1; | |
5804 | ||
5805 | /* Don't change position and object of the iterator here. They are | |
5806 | still the values of the character that had this display table | |
5807 | entry or was translated, and that's what we want. */ | |
5808 | it->what = IT_CHARACTER; | |
5809 | return 1; | |
5810 | } | |
5811 | ||
5812 | ||
5813 | /* Load IT with the next display element from Lisp string IT->string. | |
5814 | IT->current.string_pos is the current position within the string. | |
5815 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
5816 | overlay string. */ | |
5817 | ||
5818 | static int | |
5819 | next_element_from_string (it) | |
5820 | struct it *it; | |
5821 | { | |
5822 | struct text_pos position; | |
5823 | ||
5824 | xassert (STRINGP (it->string)); | |
5825 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
5826 | position = it->current.string_pos; | |
5827 | ||
5828 | /* Time to check for invisible text? */ | |
5829 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
5830 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
5831 | { | |
5832 | handle_stop (it); | |
5833 | ||
5834 | /* Since a handler may have changed IT->method, we must | |
5835 | recurse here. */ | |
5836 | return get_next_display_element (it); | |
5837 | } | |
5838 | ||
5839 | if (it->current.overlay_string_index >= 0) | |
5840 | { | |
5841 | /* Get the next character from an overlay string. In overlay | |
5842 | strings, There is no field width or padding with spaces to | |
5843 | do. */ | |
2051c264 | 5844 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
5845 | { |
5846 | it->what = IT_EOB; | |
5847 | return 0; | |
5848 | } | |
5849 | else if (STRING_MULTIBYTE (it->string)) | |
5850 | { | |
2051c264 | 5851 | int remaining = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
5852 | const unsigned char *s = (SDATA (it->string) |
5853 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 5854 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
5855 | } |
5856 | else | |
5857 | { | |
2051c264 | 5858 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
5859 | it->len = 1; |
5860 | } | |
5861 | } | |
5862 | else | |
5863 | { | |
5864 | /* Get the next character from a Lisp string that is not an | |
5865 | overlay string. Such strings come from the mode line, for | |
5866 | example. We may have to pad with spaces, or truncate the | |
5867 | string. See also next_element_from_c_string. */ | |
5868 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
5869 | { | |
5870 | it->what = IT_EOB; | |
5871 | return 0; | |
5872 | } | |
5873 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
5874 | { | |
5875 | /* Pad with spaces. */ | |
5876 | it->c = ' ', it->len = 1; | |
5877 | CHARPOS (position) = BYTEPOS (position) = -1; | |
5878 | } | |
5879 | else if (STRING_MULTIBYTE (it->string)) | |
5880 | { | |
2051c264 | 5881 | int maxlen = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
5882 | const unsigned char *s = (SDATA (it->string) |
5883 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 5884 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
5885 | } |
5886 | else | |
5887 | { | |
2051c264 | 5888 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
5889 | it->len = 1; |
5890 | } | |
5891 | } | |
5892 | ||
5893 | /* Record what we have and where it came from. Note that we store a | |
5894 | buffer position in IT->position although it could arguably be a | |
5895 | string position. */ | |
5896 | it->what = IT_CHARACTER; | |
5897 | it->object = it->string; | |
5898 | it->position = position; | |
5899 | return 1; | |
5900 | } | |
5901 | ||
5902 | ||
5903 | /* Load IT with next display element from C string IT->s. | |
5904 | IT->string_nchars is the maximum number of characters to return | |
5905 | from the string. IT->end_charpos may be greater than | |
5906 | IT->string_nchars when this function is called, in which case we | |
5907 | may have to return padding spaces. Value is zero if end of string | |
5908 | reached, including padding spaces. */ | |
5909 | ||
5910 | static int | |
5911 | next_element_from_c_string (it) | |
5912 | struct it *it; | |
5913 | { | |
5914 | int success_p = 1; | |
2311178e | 5915 | |
5f5c8ee5 GM |
5916 | xassert (it->s); |
5917 | it->what = IT_CHARACTER; | |
5918 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
5919 | it->object = Qnil; | |
2311178e | 5920 | |
5f5c8ee5 GM |
5921 | /* IT's position can be greater IT->string_nchars in case a field |
5922 | width or precision has been specified when the iterator was | |
5923 | initialized. */ | |
5924 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
5925 | { | |
5926 | /* End of the game. */ | |
5927 | it->what = IT_EOB; | |
5928 | success_p = 0; | |
5929 | } | |
5930 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
5931 | { | |
5932 | /* Pad with spaces. */ | |
5933 | it->c = ' ', it->len = 1; | |
5934 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
5935 | } | |
5936 | else if (it->multibyte_p) | |
5937 | { | |
5938 | /* Implementation note: The calls to strlen apparently aren't a | |
5939 | performance problem because there is no noticeable performance | |
5940 | difference between Emacs running in unibyte or multibyte mode. */ | |
5941 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
5942 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
5943 | maxlen, &it->len); | |
5f5c8ee5 GM |
5944 | } |
5945 | else | |
5946 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
2311178e | 5947 | |
5f5c8ee5 GM |
5948 | return success_p; |
5949 | } | |
5950 | ||
5951 | ||
5952 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
5953 | The definition of the ellipsis glyphs may come from a display table | |
5954 | entry. This function Fills IT with the first glyph from the | |
5955 | ellipsis if an ellipsis is to be displayed. */ | |
5956 | ||
13f19968 | 5957 | static int |
5f5c8ee5 GM |
5958 | next_element_from_ellipsis (it) |
5959 | struct it *it; | |
5960 | { | |
13f19968 | 5961 | if (it->selective_display_ellipsis_p) |
064fd8ec | 5962 | setup_for_ellipsis (it, it->len); |
13f19968 | 5963 | else |
54918e2b | 5964 | { |
4aad61f8 GM |
5965 | /* The face at the current position may be different from the |
5966 | face we find after the invisible text. Remember what it | |
5967 | was in IT->saved_face_id, and signal that it's there by | |
5968 | setting face_before_selective_p. */ | |
5969 | it->saved_face_id = it->face_id; | |
a6f82cc4 | 5970 | it->method = GET_FROM_BUFFER; |
54918e2b | 5971 | reseat_at_next_visible_line_start (it, 1); |
4aad61f8 | 5972 | it->face_before_selective_p = 1; |
54918e2b | 5973 | } |
2311178e | 5974 | |
13f19968 | 5975 | return get_next_display_element (it); |
5f5c8ee5 GM |
5976 | } |
5977 | ||
5978 | ||
5979 | /* Deliver an image display element. The iterator IT is already | |
5980 | filled with image information (done in handle_display_prop). Value | |
5981 | is always 1. */ | |
2311178e | 5982 | |
5f5c8ee5 GM |
5983 | |
5984 | static int | |
5985 | next_element_from_image (it) | |
5986 | struct it *it; | |
5987 | { | |
5988 | it->what = IT_IMAGE; | |
5989 | return 1; | |
5990 | } | |
5991 | ||
5992 | ||
5993 | /* Fill iterator IT with next display element from a stretch glyph | |
5994 | property. IT->object is the value of the text property. Value is | |
5995 | always 1. */ | |
5996 | ||
5997 | static int | |
5998 | next_element_from_stretch (it) | |
5999 | struct it *it; | |
6000 | { | |
6001 | it->what = IT_STRETCH; | |
6002 | return 1; | |
6003 | } | |
6004 | ||
6005 | ||
6006 | /* Load IT with the next display element from current_buffer. Value | |
6007 | is zero if end of buffer reached. IT->stop_charpos is the next | |
6008 | position at which to stop and check for text properties or buffer | |
6009 | end. */ | |
6010 | ||
6011 | static int | |
6012 | next_element_from_buffer (it) | |
6013 | struct it *it; | |
6014 | { | |
6015 | int success_p = 1; | |
6016 | ||
6017 | /* Check this assumption, otherwise, we would never enter the | |
6018 | if-statement, below. */ | |
6019 | xassert (IT_CHARPOS (*it) >= BEGV | |
6020 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
6021 | ||
6022 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
6023 | { | |
6024 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
6025 | { | |
6026 | int overlay_strings_follow_p; | |
2311178e | 6027 | |
5f5c8ee5 GM |
6028 | /* End of the game, except when overlay strings follow that |
6029 | haven't been returned yet. */ | |
6030 | if (it->overlay_strings_at_end_processed_p) | |
6031 | overlay_strings_follow_p = 0; | |
6032 | else | |
6033 | { | |
6034 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 6035 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
6036 | } |
6037 | ||
6038 | if (overlay_strings_follow_p) | |
6039 | success_p = get_next_display_element (it); | |
6040 | else | |
6041 | { | |
6042 | it->what = IT_EOB; | |
6043 | it->position = it->current.pos; | |
6044 | success_p = 0; | |
6045 | } | |
6046 | } | |
6047 | else | |
6048 | { | |
6049 | handle_stop (it); | |
6050 | return get_next_display_element (it); | |
6051 | } | |
6052 | } | |
6053 | else | |
6054 | { | |
6055 | /* No face changes, overlays etc. in sight, so just return a | |
6056 | character from current_buffer. */ | |
6057 | unsigned char *p; | |
6058 | ||
6059 | /* Maybe run the redisplay end trigger hook. Performance note: | |
6060 | This doesn't seem to cost measurable time. */ | |
6061 | if (it->redisplay_end_trigger_charpos | |
6062 | && it->glyph_row | |
6063 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
6064 | run_redisplay_end_trigger_hook (it); | |
6065 | ||
6066 | /* Get the next character, maybe multibyte. */ | |
6067 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 6068 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
6069 | { |
6070 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
6071 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 6072 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
6073 | } |
6074 | else | |
6075 | it->c = *p, it->len = 1; | |
6076 | ||
6077 | /* Record what we have and where it came from. */ | |
6078 | it->what = IT_CHARACTER;; | |
6079 | it->object = it->w->buffer; | |
6080 | it->position = it->current.pos; | |
6081 | ||
6082 | /* Normally we return the character found above, except when we | |
6083 | really want to return an ellipsis for selective display. */ | |
6084 | if (it->selective) | |
6085 | { | |
6086 | if (it->c == '\n') | |
6087 | { | |
6088 | /* A value of selective > 0 means hide lines indented more | |
6089 | than that number of columns. */ | |
6090 | if (it->selective > 0 | |
6091 | && IT_CHARPOS (*it) + 1 < ZV | |
6092 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
6093 | IT_BYTEPOS (*it) + 1, | |
a67e162b | 6094 | (double) it->selective)) /* iftc */ |
312246d1 | 6095 | { |
13f19968 | 6096 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
6097 | it->dpvec_char_len = -1; |
6098 | } | |
5f5c8ee5 GM |
6099 | } |
6100 | else if (it->c == '\r' && it->selective == -1) | |
6101 | { | |
6102 | /* A value of selective == -1 means that everything from the | |
6103 | CR to the end of the line is invisible, with maybe an | |
6104 | ellipsis displayed for it. */ | |
13f19968 | 6105 | success_p = next_element_from_ellipsis (it); |
312246d1 | 6106 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
6107 | } |
6108 | } | |
6109 | } | |
6110 | ||
6111 | /* Value is zero if end of buffer reached. */ | |
c880678e | 6112 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
6113 | return success_p; |
6114 | } | |
6115 | ||
2311178e | 6116 | |
5f5c8ee5 GM |
6117 | /* Run the redisplay end trigger hook for IT. */ |
6118 | ||
6119 | static void | |
6120 | run_redisplay_end_trigger_hook (it) | |
6121 | struct it *it; | |
6122 | { | |
6123 | Lisp_Object args[3]; | |
6124 | ||
6125 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
6126 | displaying something, or otherwise we should not run the hook. */ | |
6127 | xassert (it->glyph_row); | |
6128 | ||
6129 | /* Set up hook arguments. */ | |
6130 | args[0] = Qredisplay_end_trigger_functions; | |
6131 | args[1] = it->window; | |
6132 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
6133 | it->redisplay_end_trigger_charpos = 0; | |
6134 | ||
6135 | /* Since we are *trying* to run these functions, don't try to run | |
6136 | them again, even if they get an error. */ | |
6137 | it->w->redisplay_end_trigger = Qnil; | |
6138 | Frun_hook_with_args (3, args); | |
2311178e | 6139 | |
5f5c8ee5 GM |
6140 | /* Notice if it changed the face of the character we are on. */ |
6141 | handle_face_prop (it); | |
6142 | } | |
6143 | ||
6144 | ||
260a86a0 KH |
6145 | /* Deliver a composition display element. The iterator IT is already |
6146 | filled with composition information (done in | |
6147 | handle_composition_prop). Value is always 1. */ | |
6148 | ||
6149 | static int | |
6150 | next_element_from_composition (it) | |
6151 | struct it *it; | |
6152 | { | |
6153 | it->what = IT_COMPOSITION; | |
6154 | it->position = (STRINGP (it->string) | |
6155 | ? it->current.string_pos | |
6156 | : it->current.pos); | |
6157 | return 1; | |
6158 | } | |
6159 | ||
6160 | ||
5f5c8ee5 GM |
6161 | \f |
6162 | /*********************************************************************** | |
6163 | Moving an iterator without producing glyphs | |
6164 | ***********************************************************************/ | |
6165 | ||
367d949f KS |
6166 | /* Check if iterator is at a position corresponding to a valid buffer |
6167 | position after some move_it_ call. */ | |
6168 | ||
6169 | #define IT_POS_VALID_AFTER_MOVE_P(it) \ | |
6170 | ((it)->method == GET_FROM_STRING \ | |
6171 | ? IT_STRING_CHARPOS (*it) == 0 \ | |
6172 | : 1) | |
6173 | ||
6174 | ||
5f5c8ee5 GM |
6175 | /* Move iterator IT to a specified buffer or X position within one |
6176 | line on the display without producing glyphs. | |
6177 | ||
c53a1624 RS |
6178 | OP should be a bit mask including some or all of these bits: |
6179 | MOVE_TO_X: Stop on reaching x-position TO_X. | |
6180 | MOVE_TO_POS: Stop on reaching buffer or string position TO_CHARPOS. | |
6181 | Regardless of OP's value, stop in reaching the end of the display line. | |
5f5c8ee5 | 6182 | |
c53a1624 RS |
6183 | TO_X is normally a value 0 <= TO_X <= IT->last_visible_x. |
6184 | This means, in particular, that TO_X includes window's horizontal | |
6185 | scroll amount. | |
5f5c8ee5 | 6186 | |
c53a1624 RS |
6187 | The return value has several possible values that |
6188 | say what condition caused the scan to stop: | |
5f5c8ee5 GM |
6189 | |
6190 | MOVE_POS_MATCH_OR_ZV | |
6191 | - when TO_POS or ZV was reached. | |
2311178e | 6192 | |
5f5c8ee5 GM |
6193 | MOVE_X_REACHED |
6194 | -when TO_X was reached before TO_POS or ZV were reached. | |
2311178e | 6195 | |
5f5c8ee5 GM |
6196 | MOVE_LINE_CONTINUED |
6197 | - when we reached the end of the display area and the line must | |
6198 | be continued. | |
2311178e | 6199 | |
5f5c8ee5 GM |
6200 | MOVE_LINE_TRUNCATED |
6201 | - when we reached the end of the display area and the line is | |
6202 | truncated. | |
6203 | ||
6204 | MOVE_NEWLINE_OR_CR | |
6205 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
6206 | display is on. */ | |
6207 | ||
701552dd | 6208 | static enum move_it_result |
5f5c8ee5 GM |
6209 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
6210 | struct it *it; | |
6211 | int to_charpos, to_x, op; | |
6212 | { | |
6213 | enum move_it_result result = MOVE_UNDEFINED; | |
6214 | struct glyph_row *saved_glyph_row; | |
6215 | ||
6216 | /* Don't produce glyphs in produce_glyphs. */ | |
6217 | saved_glyph_row = it->glyph_row; | |
6218 | it->glyph_row = NULL; | |
6219 | ||
d02d0705 KS |
6220 | #define BUFFER_POS_REACHED_P() \ |
6221 | ((op & MOVE_TO_POS) != 0 \ | |
6222 | && BUFFERP (it->object) \ | |
6223 | && IT_CHARPOS (*it) >= to_charpos \ | |
e6d09683 RS |
6224 | && (it->method == GET_FROM_BUFFER \ |
6225 | || (it->method == GET_FROM_DISPLAY_VECTOR \ | |
6226 | && it->dpvec + it->current.dpvec_index + 1 >= it->dpend))) | |
d02d0705 | 6227 | |
4540d74c | 6228 | |
5f5c8ee5 GM |
6229 | while (1) |
6230 | { | |
ae26e27d | 6231 | int x, i, ascent = 0, descent = 0; |
2311178e | 6232 | |
20b44bb8 KS |
6233 | /* Stop if we move beyond TO_CHARPOS (after an image or stretch glyph). */ |
6234 | if ((op & MOVE_TO_POS) != 0 | |
6235 | && BUFFERP (it->object) | |
5fd5f17c | 6236 | && it->method == GET_FROM_BUFFER |
20b44bb8 KS |
6237 | && IT_CHARPOS (*it) > to_charpos) |
6238 | { | |
6239 | result = MOVE_POS_MATCH_OR_ZV; | |
6240 | break; | |
6241 | } | |
6242 | ||
35531849 KS |
6243 | /* Stop when ZV reached. |
6244 | We used to stop here when TO_CHARPOS reached as well, but that is | |
6245 | too soon if this glyph does not fit on this line. So we handle it | |
6246 | explicitly below. */ | |
5f5c8ee5 | 6247 | if (!get_next_display_element (it) |
35531849 KS |
6248 | || (it->truncate_lines_p |
6249 | && BUFFER_POS_REACHED_P ())) | |
5f5c8ee5 GM |
6250 | { |
6251 | result = MOVE_POS_MATCH_OR_ZV; | |
6252 | break; | |
6253 | } | |
2311178e | 6254 | |
5f5c8ee5 GM |
6255 | /* The call to produce_glyphs will get the metrics of the |
6256 | display element IT is loaded with. We record in x the | |
6257 | x-position before this display element in case it does not | |
6258 | fit on the line. */ | |
6259 | x = it->current_x; | |
2311178e | 6260 | |
47589c8c GM |
6261 | /* Remember the line height so far in case the next element doesn't |
6262 | fit on the line. */ | |
6263 | if (!it->truncate_lines_p) | |
6264 | { | |
6265 | ascent = it->max_ascent; | |
6266 | descent = it->max_descent; | |
6267 | } | |
2311178e | 6268 | |
5f5c8ee5 GM |
6269 | PRODUCE_GLYPHS (it); |
6270 | ||
6271 | if (it->area != TEXT_AREA) | |
6272 | { | |
cafafe0b | 6273 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
6274 | continue; |
6275 | } | |
6276 | ||
6277 | /* The number of glyphs we get back in IT->nglyphs will normally | |
6278 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
6279 | character on a terminal frame, or (iii) a line end. For the | |
6280 | second case, IT->nglyphs - 1 padding glyphs will be present | |
6281 | (on X frames, there is only one glyph produced for a | |
6282 | composite character. | |
6283 | ||
6284 | The behavior implemented below means, for continuation lines, | |
6285 | that as many spaces of a TAB as fit on the current line are | |
6286 | displayed there. For terminal frames, as many glyphs of a | |
6287 | multi-glyph character are displayed in the current line, too. | |
6288 | This is what the old redisplay code did, and we keep it that | |
6289 | way. Under X, the whole shape of a complex character must | |
6290 | fit on the line or it will be completely displayed in the | |
6291 | next line. | |
6292 | ||
6293 | Note that both for tabs and padding glyphs, all glyphs have | |
6294 | the same width. */ | |
6295 | if (it->nglyphs) | |
6296 | { | |
6297 | /* More than one glyph or glyph doesn't fit on line. All | |
6298 | glyphs have the same width. */ | |
6299 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
6300 | int new_x; | |
366717cf RS |
6301 | int x_before_this_char = x; |
6302 | int hpos_before_this_char = it->hpos; | |
2311178e | 6303 | |
5f5c8ee5 GM |
6304 | for (i = 0; i < it->nglyphs; ++i, x = new_x) |
6305 | { | |
6306 | new_x = x + single_glyph_width; | |
6307 | ||
6308 | /* We want to leave anything reaching TO_X to the caller. */ | |
6309 | if ((op & MOVE_TO_X) && new_x > to_x) | |
6310 | { | |
35531849 KS |
6311 | if (BUFFER_POS_REACHED_P ()) |
6312 | goto buffer_pos_reached; | |
5f5c8ee5 GM |
6313 | it->current_x = x; |
6314 | result = MOVE_X_REACHED; | |
6315 | break; | |
6316 | } | |
6317 | else if (/* Lines are continued. */ | |
6318 | !it->truncate_lines_p | |
6319 | && (/* And glyph doesn't fit on the line. */ | |
6320 | new_x > it->last_visible_x | |
6321 | /* Or it fits exactly and we're on a window | |
6322 | system frame. */ | |
6323 | || (new_x == it->last_visible_x | |
6324 | && FRAME_WINDOW_P (it->f)))) | |
6325 | { | |
6326 | if (/* IT->hpos == 0 means the very first glyph | |
6327 | doesn't fit on the line, e.g. a wide image. */ | |
6328 | it->hpos == 0 | |
6329 | || (new_x == it->last_visible_x | |
6330 | && FRAME_WINDOW_P (it->f))) | |
6331 | { | |
6332 | ++it->hpos; | |
6333 | it->current_x = new_x; | |
366717cf RS |
6334 | |
6335 | /* The character's last glyph just barely fits | |
6336 | in this row. */ | |
5f5c8ee5 | 6337 | if (i == it->nglyphs - 1) |
88e6b646 | 6338 | { |
366717cf RS |
6339 | /* If this is the destination position, |
6340 | return a position *before* it in this row, | |
6341 | now that we know it fits in this row. */ | |
6342 | if (BUFFER_POS_REACHED_P ()) | |
6343 | { | |
6344 | it->hpos = hpos_before_this_char; | |
6345 | it->current_x = x_before_this_char; | |
6346 | result = MOVE_POS_MATCH_OR_ZV; | |
6347 | break; | |
6348 | } | |
6349 | ||
88e6b646 | 6350 | set_iterator_to_next (it, 1); |
7af0e8d7 | 6351 | #ifdef HAVE_WINDOW_SYSTEM |
88e6b646 KS |
6352 | if (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)) |
6353 | { | |
f516e857 | 6354 | if (!get_next_display_element (it)) |
6d925726 KS |
6355 | { |
6356 | result = MOVE_POS_MATCH_OR_ZV; | |
6357 | break; | |
6358 | } | |
f516e857 KS |
6359 | if (BUFFER_POS_REACHED_P ()) |
6360 | { | |
6361 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6362 | result = MOVE_POS_MATCH_OR_ZV; | |
6363 | else | |
6364 | result = MOVE_LINE_CONTINUED; | |
6365 | break; | |
6366 | } | |
88e6b646 KS |
6367 | if (ITERATOR_AT_END_OF_LINE_P (it)) |
6368 | { | |
6369 | result = MOVE_NEWLINE_OR_CR; | |
6370 | break; | |
6371 | } | |
6372 | } | |
7af0e8d7 | 6373 | #endif /* HAVE_WINDOW_SYSTEM */ |
88e6b646 | 6374 | } |
5f5c8ee5 GM |
6375 | } |
6376 | else | |
47589c8c GM |
6377 | { |
6378 | it->current_x = x; | |
6379 | it->max_ascent = ascent; | |
6380 | it->max_descent = descent; | |
6381 | } | |
2311178e | 6382 | |
47589c8c GM |
6383 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", |
6384 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
6385 | result = MOVE_LINE_CONTINUED; |
6386 | break; | |
6387 | } | |
35531849 KS |
6388 | else if (BUFFER_POS_REACHED_P ()) |
6389 | goto buffer_pos_reached; | |
5f5c8ee5 GM |
6390 | else if (new_x > it->first_visible_x) |
6391 | { | |
6392 | /* Glyph is visible. Increment number of glyphs that | |
6393 | would be displayed. */ | |
6394 | ++it->hpos; | |
6395 | } | |
6396 | else | |
6397 | { | |
2311178e | 6398 | /* Glyph is completely off the left margin of the display |
5f5c8ee5 GM |
6399 | area. Nothing to do. */ |
6400 | } | |
6401 | } | |
6402 | ||
6403 | if (result != MOVE_UNDEFINED) | |
6404 | break; | |
6405 | } | |
35531849 KS |
6406 | else if (BUFFER_POS_REACHED_P ()) |
6407 | { | |
6408 | buffer_pos_reached: | |
6409 | it->current_x = x; | |
6410 | it->max_ascent = ascent; | |
6411 | it->max_descent = descent; | |
6412 | result = MOVE_POS_MATCH_OR_ZV; | |
6413 | break; | |
6414 | } | |
5f5c8ee5 GM |
6415 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) |
6416 | { | |
6417 | /* Stop when TO_X specified and reached. This check is | |
6418 | necessary here because of lines consisting of a line end, | |
6419 | only. The line end will not produce any glyphs and we | |
6420 | would never get MOVE_X_REACHED. */ | |
6421 | xassert (it->nglyphs == 0); | |
6422 | result = MOVE_X_REACHED; | |
6423 | break; | |
6424 | } | |
2311178e | 6425 | |
5f5c8ee5 GM |
6426 | /* Is this a line end? If yes, we're done. */ |
6427 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6428 | { | |
6429 | result = MOVE_NEWLINE_OR_CR; | |
6430 | break; | |
6431 | } | |
2311178e | 6432 | |
5f5c8ee5 GM |
6433 | /* The current display element has been consumed. Advance |
6434 | to the next. */ | |
cafafe0b | 6435 | set_iterator_to_next (it, 1); |
2311178e | 6436 | |
5f5c8ee5 GM |
6437 | /* Stop if lines are truncated and IT's current x-position is |
6438 | past the right edge of the window now. */ | |
6439 | if (it->truncate_lines_p | |
6440 | && it->current_x >= it->last_visible_x) | |
6441 | { | |
7af0e8d7 | 6442 | #ifdef HAVE_WINDOW_SYSTEM |
88e6b646 KS |
6443 | if (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)) |
6444 | { | |
4540d74c KS |
6445 | if (!get_next_display_element (it) |
6446 | || BUFFER_POS_REACHED_P ()) | |
6d925726 KS |
6447 | { |
6448 | result = MOVE_POS_MATCH_OR_ZV; | |
6449 | break; | |
6450 | } | |
88e6b646 KS |
6451 | if (ITERATOR_AT_END_OF_LINE_P (it)) |
6452 | { | |
6453 | result = MOVE_NEWLINE_OR_CR; | |
6454 | break; | |
6455 | } | |
6456 | } | |
7af0e8d7 | 6457 | #endif /* HAVE_WINDOW_SYSTEM */ |
5f5c8ee5 GM |
6458 | result = MOVE_LINE_TRUNCATED; |
6459 | break; | |
6460 | } | |
6461 | } | |
6462 | ||
4540d74c KS |
6463 | #undef BUFFER_POS_REACHED_P |
6464 | ||
5f5c8ee5 GM |
6465 | /* Restore the iterator settings altered at the beginning of this |
6466 | function. */ | |
6467 | it->glyph_row = saved_glyph_row; | |
6468 | return result; | |
6469 | } | |
6470 | ||
6471 | ||
9b2bba76 RS |
6472 | /* Move IT forward until it satisfies one or more of the criteria in |
6473 | TO_CHARPOS, TO_X, TO_Y, and TO_VPOS. | |
6474 | ||
6475 | OP is a bit-mask that specifies where to stop, and in particular, | |
6476 | which of those four position arguments makes a difference. See the | |
6477 | description of enum move_operation_enum. | |
2311178e | 6478 | |
5f5c8ee5 GM |
6479 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a |
6480 | screen line, this function will set IT to the next position > | |
6481 | TO_CHARPOS. */ | |
6482 | ||
6483 | void | |
6484 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
6485 | struct it *it; | |
6486 | int to_charpos, to_x, to_y, to_vpos; | |
6487 | int op; | |
6488 | { | |
6489 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
6490 | int line_height; | |
47589c8c | 6491 | int reached = 0; |
5f5c8ee5 | 6492 | |
47589c8c | 6493 | for (;;) |
5f5c8ee5 GM |
6494 | { |
6495 | if (op & MOVE_TO_VPOS) | |
6496 | { | |
6497 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
6498 | start of the line TO_VPOS. */ | |
6499 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
6500 | { | |
6501 | if (it->vpos == to_vpos) | |
47589c8c GM |
6502 | { |
6503 | reached = 1; | |
6504 | break; | |
6505 | } | |
6506 | else | |
6507 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
6508 | } |
6509 | else | |
6510 | { | |
6511 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
6512 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
6513 | if (it->vpos == to_vpos) |
6514 | { | |
6515 | reached = 2; | |
6516 | break; | |
6517 | } | |
2311178e | 6518 | |
5f5c8ee5 GM |
6519 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
6520 | ||
6521 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
6522 | { |
6523 | reached = 3; | |
6524 | break; | |
6525 | } | |
5f5c8ee5 GM |
6526 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
6527 | { | |
6528 | /* We have reached TO_X but not in the line we want. */ | |
6529 | skip = move_it_in_display_line_to (it, to_charpos, | |
6530 | -1, MOVE_TO_POS); | |
6531 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
6532 | { |
6533 | reached = 4; | |
6534 | break; | |
6535 | } | |
5f5c8ee5 GM |
6536 | } |
6537 | } | |
6538 | } | |
6539 | else if (op & MOVE_TO_Y) | |
6540 | { | |
6541 | struct it it_backup; | |
2311178e | 6542 | |
5f5c8ee5 GM |
6543 | /* TO_Y specified means stop at TO_X in the line containing |
6544 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
6545 | problem is that we can't really tell whether the line | |
6546 | contains TO_Y before we have completely scanned it, and | |
6547 | this may skip past TO_X. What we do is to first scan to | |
6548 | TO_X. | |
6549 | ||
6550 | If TO_X is not specified, use a TO_X of zero. The reason | |
6551 | is to make the outcome of this function more predictable. | |
6552 | If we didn't use TO_X == 0, we would stop at the end of | |
6553 | the line which is probably not what a caller would expect | |
6554 | to happen. */ | |
6555 | skip = move_it_in_display_line_to (it, to_charpos, | |
6556 | ((op & MOVE_TO_X) | |
6557 | ? to_x : 0), | |
6558 | (MOVE_TO_X | |
6559 | | (op & MOVE_TO_POS))); | |
6560 | ||
6561 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
6562 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
6563 | { |
6564 | reached = 5; | |
6565 | break; | |
6566 | } | |
2311178e | 6567 | |
5f5c8ee5 GM |
6568 | /* If TO_X was reached, we would like to know whether TO_Y |
6569 | is in the line. This can only be said if we know the | |
6570 | total line height which requires us to scan the rest of | |
6571 | the line. */ | |
5f5c8ee5 GM |
6572 | if (skip == MOVE_X_REACHED) |
6573 | { | |
6574 | it_backup = *it; | |
47589c8c | 6575 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
6576 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
6577 | op & MOVE_TO_POS); | |
47589c8c | 6578 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
6579 | } |
6580 | ||
6581 | /* Now, decide whether TO_Y is in this line. */ | |
6582 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 6583 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
2311178e | 6584 | |
5f5c8ee5 GM |
6585 | if (to_y >= it->current_y |
6586 | && to_y < it->current_y + line_height) | |
6587 | { | |
6588 | if (skip == MOVE_X_REACHED) | |
6589 | /* If TO_Y is in this line and TO_X was reached above, | |
6590 | we scanned too far. We have to restore IT's settings | |
6591 | to the ones before skipping. */ | |
6592 | *it = it_backup; | |
47589c8c | 6593 | reached = 6; |
5f5c8ee5 GM |
6594 | } |
6595 | else if (skip == MOVE_X_REACHED) | |
6596 | { | |
6597 | skip = skip2; | |
6598 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 6599 | reached = 7; |
5f5c8ee5 GM |
6600 | } |
6601 | ||
47589c8c | 6602 | if (reached) |
5f5c8ee5 GM |
6603 | break; |
6604 | } | |
6605 | else | |
6606 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
6607 | ||
6608 | switch (skip) | |
6609 | { | |
6610 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
6611 | reached = 8; |
6612 | goto out; | |
5f5c8ee5 GM |
6613 | |
6614 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 6615 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
6616 | it->continuation_lines_width = 0; |
6617 | break; | |
6618 | ||
6619 | case MOVE_LINE_TRUNCATED: | |
6620 | it->continuation_lines_width = 0; | |
312246d1 | 6621 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
6622 | if ((op & MOVE_TO_POS) != 0 |
6623 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
6624 | { |
6625 | reached = 9; | |
6626 | goto out; | |
6627 | } | |
5f5c8ee5 GM |
6628 | break; |
6629 | ||
6630 | case MOVE_LINE_CONTINUED: | |
6631 | it->continuation_lines_width += it->current_x; | |
6632 | break; | |
6633 | ||
6634 | default: | |
6635 | abort (); | |
6636 | } | |
6637 | ||
6638 | /* Reset/increment for the next run. */ | |
6639 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
6640 | it->current_x = it->hpos = 0; | |
6641 | it->current_y += it->max_ascent + it->max_descent; | |
6642 | ++it->vpos; | |
6643 | last_height = it->max_ascent + it->max_descent; | |
6644 | last_max_ascent = it->max_ascent; | |
6645 | it->max_ascent = it->max_descent = 0; | |
6646 | } | |
2311178e | 6647 | |
47589c8c GM |
6648 | out: |
6649 | ||
6650 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
6651 | } |
6652 | ||
6653 | ||
6654 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
6655 | ||
6656 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
6657 | means move IT backward to the preceding line start or BEGV. This | |
6658 | function may move over more than DY pixels if IT->current_y - DY | |
6659 | ends up in the middle of a line; in this case IT->current_y will be | |
6660 | set to the top of the line moved to. */ | |
6661 | ||
6662 | void | |
6663 | move_it_vertically_backward (it, dy) | |
6664 | struct it *it; | |
6665 | int dy; | |
6666 | { | |
79ddf6f7 GM |
6667 | int nlines, h; |
6668 | struct it it2, it3; | |
546f98b8 | 6669 | int start_pos; |
2311178e | 6670 | |
546f98b8 | 6671 | move_further_back: |
5f5c8ee5 GM |
6672 | xassert (dy >= 0); |
6673 | ||
546f98b8 KS |
6674 | start_pos = IT_CHARPOS (*it); |
6675 | ||
5f5c8ee5 | 6676 | /* Estimate how many newlines we must move back. */ |
da8b7f4f | 6677 | nlines = max (1, dy / FRAME_LINE_HEIGHT (it->f)); |
5f5c8ee5 GM |
6678 | |
6679 | /* Set the iterator's position that many lines back. */ | |
6680 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
6681 | back_to_previous_visible_line_start (it); | |
6682 | ||
6683 | /* Reseat the iterator here. When moving backward, we don't want | |
6684 | reseat to skip forward over invisible text, set up the iterator | |
6685 | to deliver from overlay strings at the new position etc. So, | |
6686 | use reseat_1 here. */ | |
6687 | reseat_1 (it, it->current.pos, 1); | |
6688 | ||
6689 | /* We are now surely at a line start. */ | |
6690 | it->current_x = it->hpos = 0; | |
0e47bbf7 | 6691 | it->continuation_lines_width = 0; |
5f5c8ee5 GM |
6692 | |
6693 | /* Move forward and see what y-distance we moved. First move to the | |
6694 | start of the next line so that we get its height. We need this | |
6695 | height to be able to tell whether we reached the specified | |
6696 | y-distance. */ | |
6697 | it2 = *it; | |
6698 | it2.max_ascent = it2.max_descent = 0; | |
e0e9a80e KS |
6699 | do |
6700 | { | |
6701 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
6702 | MOVE_TO_POS | MOVE_TO_VPOS); | |
6703 | } | |
367d949f | 6704 | while (!IT_POS_VALID_AFTER_MOVE_P (&it2)); |
5f5c8ee5 | 6705 | xassert (IT_CHARPOS (*it) >= BEGV); |
79ddf6f7 | 6706 | it3 = it2; |
2311178e | 6707 | |
5f5c8ee5 GM |
6708 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
6709 | xassert (IT_CHARPOS (*it) >= BEGV); | |
ccbb9ed2 RS |
6710 | /* H is the actual vertical distance from the position in *IT |
6711 | and the starting position. */ | |
5f5c8ee5 | 6712 | h = it2.current_y - it->current_y; |
ccbb9ed2 | 6713 | /* NLINES is the distance in number of lines. */ |
5f5c8ee5 GM |
6714 | nlines = it2.vpos - it->vpos; |
6715 | ||
ccbb9ed2 RS |
6716 | /* Correct IT's y and vpos position |
6717 | so that they are relative to the starting point. */ | |
5f5c8ee5 GM |
6718 | it->vpos -= nlines; |
6719 | it->current_y -= h; | |
2311178e | 6720 | |
5f5c8ee5 GM |
6721 | if (dy == 0) |
6722 | { | |
6723 | /* DY == 0 means move to the start of the screen line. The | |
6724 | value of nlines is > 0 if continuation lines were involved. */ | |
6725 | if (nlines > 0) | |
6726 | move_it_by_lines (it, nlines, 1); | |
d782c348 KS |
6727 | #if 0 |
6728 | /* I think this assert is bogus if buffer contains | |
6729 | invisible text or images. KFS. */ | |
5f5c8ee5 | 6730 | xassert (IT_CHARPOS (*it) <= start_pos); |
d782c348 | 6731 | #endif |
5f5c8ee5 | 6732 | } |
ccbb9ed2 | 6733 | else |
5f5c8ee5 | 6734 | { |
ccbb9ed2 RS |
6735 | /* The y-position we try to reach, relative to *IT. |
6736 | Note that H has been subtracted in front of the if-statement. */ | |
5f5c8ee5 | 6737 | int target_y = it->current_y + h - dy; |
79ddf6f7 GM |
6738 | int y0 = it3.current_y; |
6739 | int y1 = line_bottom_y (&it3); | |
6740 | int line_height = y1 - y0; | |
f7ccfc8c | 6741 | |
5f5c8ee5 GM |
6742 | /* If we did not reach target_y, try to move further backward if |
6743 | we can. If we moved too far backward, try to move forward. */ | |
6744 | if (target_y < it->current_y | |
79ddf6f7 GM |
6745 | /* This is heuristic. In a window that's 3 lines high, with |
6746 | a line height of 13 pixels each, recentering with point | |
6747 | on the bottom line will try to move -39/2 = 19 pixels | |
6748 | backward. Try to avoid moving into the first line. */ | |
e10ee30c KS |
6749 | && (it->current_y - target_y |
6750 | > min (window_box_height (it->w), line_height * 2 / 3)) | |
5f5c8ee5 GM |
6751 | && IT_CHARPOS (*it) > BEGV) |
6752 | { | |
f7ccfc8c GM |
6753 | TRACE_MOVE ((stderr, " not far enough -> move_vert %d\n", |
6754 | target_y - it->current_y)); | |
546f98b8 KS |
6755 | dy = it->current_y - target_y; |
6756 | goto move_further_back; | |
5f5c8ee5 GM |
6757 | } |
6758 | else if (target_y >= it->current_y + line_height | |
6759 | && IT_CHARPOS (*it) < ZV) | |
6760 | { | |
55591976 | 6761 | /* Should move forward by at least one line, maybe more. |
2311178e | 6762 | |
55591976 GM |
6763 | Note: Calling move_it_by_lines can be expensive on |
6764 | terminal frames, where compute_motion is used (via | |
6765 | vmotion) to do the job, when there are very long lines | |
6766 | and truncate-lines is nil. That's the reason for | |
6767 | treating terminal frames specially here. */ | |
2311178e | 6768 | |
55591976 GM |
6769 | if (!FRAME_WINDOW_P (it->f)) |
6770 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
6771 | else | |
f7ccfc8c | 6772 | { |
55591976 GM |
6773 | do |
6774 | { | |
6775 | move_it_by_lines (it, 1, 1); | |
6776 | } | |
6777 | while (target_y >= line_bottom_y (it) && IT_CHARPOS (*it) < ZV); | |
f7ccfc8c | 6778 | } |
f7ccfc8c | 6779 | |
d782c348 KS |
6780 | #if 0 |
6781 | /* I think this assert is bogus if buffer contains | |
6782 | invisible text or images. KFS. */ | |
5f5c8ee5 | 6783 | xassert (IT_CHARPOS (*it) >= BEGV); |
d782c348 | 6784 | #endif |
5f5c8ee5 GM |
6785 | } |
6786 | } | |
6787 | } | |
6788 | ||
6789 | ||
6790 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
6791 | move backwards. DY = 0 means move to start of screen line. At the | |
6792 | end, IT will be on the start of a screen line. */ | |
6793 | ||
2311178e | 6794 | void |
5f5c8ee5 GM |
6795 | move_it_vertically (it, dy) |
6796 | struct it *it; | |
6797 | int dy; | |
6798 | { | |
6799 | if (dy <= 0) | |
6800 | move_it_vertically_backward (it, -dy); | |
546f98b8 | 6801 | else |
5f5c8ee5 | 6802 | { |
47589c8c | 6803 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
6804 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
6805 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 6806 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
6807 | |
6808 | /* If buffer ends in ZV without a newline, move to the start of | |
6809 | the line to satisfy the post-condition. */ | |
6810 | if (IT_CHARPOS (*it) == ZV | |
ad5afd5b | 6811 | && ZV > BEGV |
5f5c8ee5 GM |
6812 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') |
6813 | move_it_by_lines (it, 0, 0); | |
6814 | } | |
6815 | } | |
6816 | ||
6817 | ||
47fc2c10 GM |
6818 | /* Move iterator IT past the end of the text line it is in. */ |
6819 | ||
6820 | void | |
6821 | move_it_past_eol (it) | |
6822 | struct it *it; | |
6823 | { | |
6824 | enum move_it_result rc; | |
2311178e | 6825 | |
47fc2c10 GM |
6826 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); |
6827 | if (rc == MOVE_NEWLINE_OR_CR) | |
6828 | set_iterator_to_next (it, 0); | |
6829 | } | |
6830 | ||
6831 | ||
2c79b732 GM |
6832 | #if 0 /* Currently not used. */ |
6833 | ||
5f5c8ee5 GM |
6834 | /* Return non-zero if some text between buffer positions START_CHARPOS |
6835 | and END_CHARPOS is invisible. IT->window is the window for text | |
6836 | property lookup. */ | |
6837 | ||
6838 | static int | |
6839 | invisible_text_between_p (it, start_charpos, end_charpos) | |
6840 | struct it *it; | |
6841 | int start_charpos, end_charpos; | |
6842 | { | |
5f5c8ee5 GM |
6843 | Lisp_Object prop, limit; |
6844 | int invisible_found_p; | |
2311178e | 6845 | |
5f5c8ee5 GM |
6846 | xassert (it != NULL && start_charpos <= end_charpos); |
6847 | ||
6848 | /* Is text at START invisible? */ | |
6849 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
6850 | it->window); | |
6851 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
6852 | invisible_found_p = 1; | |
6853 | else | |
6854 | { | |
016b5642 MB |
6855 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
6856 | Qinvisible, Qnil, | |
6857 | make_number (end_charpos)); | |
5f5c8ee5 GM |
6858 | invisible_found_p = XFASTINT (limit) < end_charpos; |
6859 | } | |
6860 | ||
6861 | return invisible_found_p; | |
5f5c8ee5 GM |
6862 | } |
6863 | ||
2c79b732 GM |
6864 | #endif /* 0 */ |
6865 | ||
5f5c8ee5 GM |
6866 | |
6867 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
6868 | negative means move up. DVPOS == 0 means move to the start of the | |
6869 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
6870 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
6871 | ||
6872 | Further optimization ideas: If we would know that IT->f doesn't use | |
6873 | a face with proportional font, we could be faster for | |
6874 | truncate-lines nil. */ | |
6875 | ||
6876 | void | |
6877 | move_it_by_lines (it, dvpos, need_y_p) | |
6878 | struct it *it; | |
6879 | int dvpos, need_y_p; | |
6880 | { | |
6881 | struct position pos; | |
2311178e | 6882 | |
5f5c8ee5 GM |
6883 | if (!FRAME_WINDOW_P (it->f)) |
6884 | { | |
6885 | struct text_pos textpos; | |
2311178e | 6886 | |
5f5c8ee5 GM |
6887 | /* We can use vmotion on frames without proportional fonts. */ |
6888 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
6889 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
6890 | reseat (it, textpos, 1); | |
6891 | it->vpos += pos.vpos; | |
6892 | it->current_y += pos.vpos; | |
6893 | } | |
6894 | else if (dvpos == 0) | |
6895 | { | |
6896 | /* DVPOS == 0 means move to the start of the screen line. */ | |
6897 | move_it_vertically_backward (it, 0); | |
6898 | xassert (it->current_x == 0 && it->hpos == 0); | |
546f98b8 KS |
6899 | /* Let next call to line_bottom_y calculate real line height */ |
6900 | last_height = 0; | |
5f5c8ee5 GM |
6901 | } |
6902 | else if (dvpos > 0) | |
e0e9a80e KS |
6903 | { |
6904 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
367d949f | 6905 | if (!IT_POS_VALID_AFTER_MOVE_P (it)) |
e0e9a80e KS |
6906 | move_it_to (it, IT_CHARPOS (*it) + 1, -1, -1, -1, MOVE_TO_POS); |
6907 | } | |
5f5c8ee5 GM |
6908 | else |
6909 | { | |
6910 | struct it it2; | |
6911 | int start_charpos, i; | |
2311178e | 6912 | |
e8660d73 | 6913 | /* Start at the beginning of the screen line containing IT's |
e0e9a80e KS |
6914 | position. This may actually move vertically backwards, |
6915 | in case of overlays, so adjust dvpos accordingly. */ | |
6916 | dvpos += it->vpos; | |
e8660d73 | 6917 | move_it_vertically_backward (it, 0); |
e0e9a80e | 6918 | dvpos -= it->vpos; |
2311178e | 6919 | |
5f5c8ee5 GM |
6920 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
6921 | start_charpos = IT_CHARPOS (*it); | |
e0e9a80e | 6922 | for (i = -dvpos; i > 0 && IT_CHARPOS (*it) > BEGV; --i) |
5f5c8ee5 GM |
6923 | back_to_previous_visible_line_start (it); |
6924 | reseat (it, it->current.pos, 1); | |
e0e9a80e KS |
6925 | |
6926 | /* Move further back if we end up in a string or an image. */ | |
367d949f | 6927 | while (!IT_POS_VALID_AFTER_MOVE_P (it)) |
e0e9a80e KS |
6928 | { |
6929 | /* First try to move to start of display line. */ | |
6930 | dvpos += it->vpos; | |
6931 | move_it_vertically_backward (it, 0); | |
6932 | dvpos -= it->vpos; | |
367d949f | 6933 | if (IT_POS_VALID_AFTER_MOVE_P (it)) |
e0e9a80e KS |
6934 | break; |
6935 | /* If start of line is still in string or image, | |
6936 | move further back. */ | |
6937 | back_to_previous_visible_line_start (it); | |
6938 | reseat (it, it->current.pos, 1); | |
6939 | dvpos--; | |
6940 | } | |
6941 | ||
5f5c8ee5 GM |
6942 | it->current_x = it->hpos = 0; |
6943 | ||
6944 | /* Above call may have moved too far if continuation lines | |
6945 | are involved. Scan forward and see if it did. */ | |
6946 | it2 = *it; | |
6947 | it2.vpos = it2.current_y = 0; | |
6948 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
6949 | it->vpos -= it2.vpos; | |
6950 | it->current_y -= it2.current_y; | |
6951 | it->current_x = it->hpos = 0; | |
6952 | ||
6adb6f01 | 6953 | /* If we moved too far back, move IT some lines forward. */ |
5f5c8ee5 GM |
6954 | if (it2.vpos > -dvpos) |
6955 | { | |
6956 | int delta = it2.vpos + dvpos; | |
6adb6f01 | 6957 | it2 = *it; |
5f5c8ee5 | 6958 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); |
6adb6f01 KS |
6959 | /* Move back again if we got too far ahead. */ |
6960 | if (IT_CHARPOS (*it) >= start_charpos) | |
6961 | *it = it2; | |
5f5c8ee5 GM |
6962 | } |
6963 | } | |
6964 | } | |
6965 | ||
3824b1a6 AS |
6966 | /* Return 1 if IT points into the middle of a display vector. */ |
6967 | ||
6968 | int | |
6969 | in_display_vector_p (it) | |
6970 | struct it *it; | |
6971 | { | |
a6f82cc4 | 6972 | return (it->method == GET_FROM_DISPLAY_VECTOR |
3824b1a6 AS |
6973 | && it->current.dpvec_index > 0 |
6974 | && it->dpvec + it->current.dpvec_index != it->dpend); | |
6975 | } | |
5f5c8ee5 GM |
6976 | |
6977 | \f | |
6978 | /*********************************************************************** | |
6979 | Messages | |
6980 | ***********************************************************************/ | |
6981 | ||
6982 | ||
937248bc GM |
6983 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
6984 | to *Messages*. */ | |
6985 | ||
6986 | void | |
6987 | add_to_log (format, arg1, arg2) | |
6988 | char *format; | |
6989 | Lisp_Object arg1, arg2; | |
6990 | { | |
6991 | Lisp_Object args[3]; | |
6992 | Lisp_Object msg, fmt; | |
6993 | char *buffer; | |
6994 | int len; | |
6995 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
dbadb64b | 6996 | USE_SAFE_ALLOCA; |
937248bc | 6997 | |
ae794295 GM |
6998 | /* Do nothing if called asynchronously. Inserting text into |
6999 | a buffer may call after-change-functions and alike and | |
7000 | that would means running Lisp asynchronously. */ | |
7001 | if (handling_signal) | |
7002 | return; | |
7003 | ||
937248bc GM |
7004 | fmt = msg = Qnil; |
7005 | GCPRO4 (fmt, msg, arg1, arg2); | |
2311178e | 7006 | |
937248bc GM |
7007 | args[0] = fmt = build_string (format); |
7008 | args[1] = arg1; | |
7009 | args[2] = arg2; | |
6fc556fd | 7010 | msg = Fformat (3, args); |
937248bc | 7011 | |
2051c264 | 7012 | len = SBYTES (msg) + 1; |
dbadb64b | 7013 | SAFE_ALLOCA (buffer, char *, len); |
2051c264 | 7014 | bcopy (SDATA (msg), buffer, len); |
2311178e | 7015 | |
796184bc | 7016 | message_dolog (buffer, len - 1, 1, 0); |
233f3db6 | 7017 | SAFE_FREE (); |
dbadb64b | 7018 | |
937248bc GM |
7019 | UNGCPRO; |
7020 | } | |
7021 | ||
7022 | ||
5f5c8ee5 GM |
7023 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
7024 | ||
7025 | void | |
7026 | message_log_maybe_newline () | |
7027 | { | |
7028 | if (message_log_need_newline) | |
7029 | message_dolog ("", 0, 1, 0); | |
7030 | } | |
7031 | ||
7032 | ||
1e313f28 | 7033 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
7034 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
7035 | nonzero, means interpret the contents of M as multibyte. This | |
7036 | function calls low-level routines in order to bypass text property | |
f291069a KS |
7037 | hooks, etc. which might not be safe to run. |
7038 | ||
7039 | This may GC (insert may run before/after change hooks), | |
7040 | so the buffer M must NOT point to a Lisp string. */ | |
5f5c8ee5 GM |
7041 | |
7042 | void | |
1e313f28 | 7043 | message_dolog (m, nbytes, nlflag, multibyte) |
50f80c2f | 7044 | const char *m; |
1e313f28 | 7045 | int nbytes, nlflag, multibyte; |
5f5c8ee5 | 7046 | { |
a67e162b RS |
7047 | if (!NILP (Vmemory_full)) |
7048 | return; | |
7049 | ||
5f5c8ee5 GM |
7050 | if (!NILP (Vmessage_log_max)) |
7051 | { | |
7052 | struct buffer *oldbuf; | |
7053 | Lisp_Object oldpoint, oldbegv, oldzv; | |
7054 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
7055 | int point_at_end = 0; | |
7056 | int zv_at_end = 0; | |
7057 | Lisp_Object old_deactivate_mark, tem; | |
6052529b | 7058 | struct gcpro gcpro1; |
5f5c8ee5 GM |
7059 | |
7060 | old_deactivate_mark = Vdeactivate_mark; | |
7061 | oldbuf = current_buffer; | |
6a94510a | 7062 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
7063 | current_buffer->undo_list = Qt; |
7064 | ||
b14bc55e RS |
7065 | oldpoint = message_dolog_marker1; |
7066 | set_marker_restricted (oldpoint, make_number (PT), Qnil); | |
7067 | oldbegv = message_dolog_marker2; | |
7068 | set_marker_restricted (oldbegv, make_number (BEGV), Qnil); | |
7069 | oldzv = message_dolog_marker3; | |
7070 | set_marker_restricted (oldzv, make_number (ZV), Qnil); | |
7071 | GCPRO1 (old_deactivate_mark); | |
5f5c8ee5 GM |
7072 | |
7073 | if (PT == Z) | |
7074 | point_at_end = 1; | |
7075 | if (ZV == Z) | |
7076 | zv_at_end = 1; | |
7077 | ||
7078 | BEGV = BEG; | |
7079 | BEGV_BYTE = BEG_BYTE; | |
7080 | ZV = Z; | |
7081 | ZV_BYTE = Z_BYTE; | |
7082 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
7083 | ||
7084 | /* Insert the string--maybe converting multibyte to single byte | |
7085 | or vice versa, so that all the text fits the buffer. */ | |
7086 | if (multibyte | |
7087 | && NILP (current_buffer->enable_multibyte_characters)) | |
7088 | { | |
1e313f28 | 7089 | int i, c, char_bytes; |
5f5c8ee5 | 7090 | unsigned char work[1]; |
2311178e | 7091 | |
5f5c8ee5 GM |
7092 | /* Convert a multibyte string to single-byte |
7093 | for the *Message* buffer. */ | |
6e57ec5e | 7094 | for (i = 0; i < nbytes; i += char_bytes) |
5f5c8ee5 | 7095 | { |
1e313f28 | 7096 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
7097 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
7098 | ? c | |
7099 | : multibyte_char_to_unibyte (c, Qnil)); | |
7100 | insert_1_both (work, 1, 1, 1, 0, 0); | |
7101 | } | |
7102 | } | |
7103 | else if (! multibyte | |
7104 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
7105 | { | |
1e313f28 | 7106 | int i, c, char_bytes; |
5f5c8ee5 | 7107 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 7108 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
7109 | /* Convert a single-byte string to multibyte |
7110 | for the *Message* buffer. */ | |
1e313f28 | 7111 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
7112 | { |
7113 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
7114 | char_bytes = CHAR_STRING (c, str); |
7115 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
7116 | } |
7117 | } | |
1e313f28 GM |
7118 | else if (nbytes) |
7119 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
7120 | |
7121 | if (nlflag) | |
7122 | { | |
7123 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
7124 | insert_1 ("\n", 1, 1, 0, 0); | |
7125 | ||
7126 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
7127 | this_bol = PT; | |
7128 | this_bol_byte = PT_BYTE; | |
7129 | ||
b14bc55e RS |
7130 | /* See if this line duplicates the previous one. |
7131 | If so, combine duplicates. */ | |
5f5c8ee5 GM |
7132 | if (this_bol > BEG) |
7133 | { | |
7134 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
7135 | prev_bol = PT; | |
7136 | prev_bol_byte = PT_BYTE; | |
7137 | ||
7138 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
7139 | this_bol, this_bol_byte); | |
7140 | if (dup) | |
7141 | { | |
7142 | del_range_both (prev_bol, prev_bol_byte, | |
7143 | this_bol, this_bol_byte, 0); | |
7144 | if (dup > 1) | |
7145 | { | |
7146 | char dupstr[40]; | |
7147 | int duplen; | |
7148 | ||
7149 | /* If you change this format, don't forget to also | |
7150 | change message_log_check_duplicate. */ | |
7151 | sprintf (dupstr, " [%d times]", dup); | |
7152 | duplen = strlen (dupstr); | |
7153 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
7154 | insert_1 (dupstr, duplen, 1, 0, 1); | |
7155 | } | |
7156 | } | |
7157 | } | |
7158 | ||
b14bc55e RS |
7159 | /* If we have more than the desired maximum number of lines |
7160 | in the *Messages* buffer now, delete the oldest ones. | |
7161 | This is safe because we don't have undo in this buffer. */ | |
7162 | ||
5f5c8ee5 GM |
7163 | if (NATNUMP (Vmessage_log_max)) |
7164 | { | |
7165 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
7166 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
7167 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
7168 | } | |
7169 | } | |
7170 | BEGV = XMARKER (oldbegv)->charpos; | |
7171 | BEGV_BYTE = marker_byte_position (oldbegv); | |
7172 | ||
7173 | if (zv_at_end) | |
7174 | { | |
7175 | ZV = Z; | |
7176 | ZV_BYTE = Z_BYTE; | |
7177 | } | |
7178 | else | |
7179 | { | |
7180 | ZV = XMARKER (oldzv)->charpos; | |
7181 | ZV_BYTE = marker_byte_position (oldzv); | |
7182 | } | |
7183 | ||
7184 | if (point_at_end) | |
7185 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
7186 | else | |
7187 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
7188 | Lisp code. */ | |
7189 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
7190 | XMARKER (oldpoint)->bytepos); | |
7191 | ||
7192 | UNGCPRO; | |
cfea0546 SM |
7193 | unchain_marker (XMARKER (oldpoint)); |
7194 | unchain_marker (XMARKER (oldbegv)); | |
7195 | unchain_marker (XMARKER (oldzv)); | |
5f5c8ee5 GM |
7196 | |
7197 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
7198 | set_buffer_internal (oldbuf); | |
7199 | if (NILP (tem)) | |
7200 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
7201 | message_log_need_newline = !nlflag; | |
7202 | Vdeactivate_mark = old_deactivate_mark; | |
7203 | } | |
7204 | } | |
7205 | ||
7206 | ||
7207 | /* We are at the end of the buffer after just having inserted a newline. | |
7208 | (Note: We depend on the fact we won't be crossing the gap.) | |
7209 | Check to see if the most recent message looks a lot like the previous one. | |
7210 | Return 0 if different, 1 if the new one should just replace it, or a | |
7211 | value N > 1 if we should also append " [N times]". */ | |
7212 | ||
7213 | static int | |
7214 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
7215 | int prev_bol, this_bol; | |
7216 | int prev_bol_byte, this_bol_byte; | |
7217 | { | |
7218 | int i; | |
7219 | int len = Z_BYTE - 1 - this_bol_byte; | |
7220 | int seen_dots = 0; | |
7221 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
7222 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
7223 | ||
7224 | for (i = 0; i < len; i++) | |
7225 | { | |
509633e3 | 7226 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
7227 | seen_dots = 1; |
7228 | if (p1[i] != p2[i]) | |
7229 | return seen_dots; | |
7230 | } | |
7231 | p1 += len; | |
7232 | if (*p1 == '\n') | |
7233 | return 2; | |
7234 | if (*p1++ == ' ' && *p1++ == '[') | |
7235 | { | |
7236 | int n = 0; | |
7237 | while (*p1 >= '0' && *p1 <= '9') | |
7238 | n = n * 10 + *p1++ - '0'; | |
7239 | if (strncmp (p1, " times]\n", 8) == 0) | |
7240 | return n+1; | |
7241 | } | |
7242 | return 0; | |
7243 | } | |
b2683be4 | 7244 | \f |
5f5c8ee5 | 7245 | |
1e313f28 GM |
7246 | /* Display an echo area message M with a specified length of NBYTES |
7247 | bytes. The string may include null characters. If M is 0, clear | |
7248 | out any existing message, and let the mini-buffer text show | |
7249 | through. | |
5f5c8ee5 | 7250 | |
f291069a | 7251 | This may GC, so the buffer M must NOT point to a Lisp string. */ |
5f5c8ee5 GM |
7252 | |
7253 | void | |
1e313f28 | 7254 | message2 (m, nbytes, multibyte) |
50f80c2f | 7255 | const char *m; |
1e313f28 | 7256 | int nbytes; |
5f5c8ee5 GM |
7257 | int multibyte; |
7258 | { | |
7259 | /* First flush out any partial line written with print. */ | |
7260 | message_log_maybe_newline (); | |
7261 | if (m) | |
1e313f28 GM |
7262 | message_dolog (m, nbytes, 1, multibyte); |
7263 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
7264 | } |
7265 | ||
7266 | ||
7267 | /* The non-logging counterpart of message2. */ | |
7268 | ||
7269 | void | |
1e313f28 | 7270 | message2_nolog (m, nbytes, multibyte) |
50f80c2f | 7271 | const char *m; |
e3383b6f | 7272 | int nbytes, multibyte; |
5f5c8ee5 | 7273 | { |
886bd6f2 | 7274 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
7275 | message_enable_multibyte = multibyte; |
7276 | ||
7277 | if (noninteractive) | |
7278 | { | |
7279 | if (noninteractive_need_newline) | |
7280 | putc ('\n', stderr); | |
7281 | noninteractive_need_newline = 0; | |
7282 | if (m) | |
1e313f28 | 7283 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
7284 | if (cursor_in_echo_area == 0) |
7285 | fprintf (stderr, "\n"); | |
7286 | fflush (stderr); | |
7287 | } | |
7288 | /* A null message buffer means that the frame hasn't really been | |
7289 | initialized yet. Error messages get reported properly by | |
7290 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 7291 | else if (INTERACTIVE |
886bd6f2 GM |
7292 | && sf->glyphs_initialized_p |
7293 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
7294 | { |
7295 | Lisp_Object mini_window; | |
7296 | struct frame *f; | |
7297 | ||
7298 | /* Get the frame containing the mini-buffer | |
7299 | that the selected frame is using. */ | |
886bd6f2 | 7300 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
7301 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
7302 | ||
7303 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 7304 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
7305 | && ! FRAME_VISIBLE_P (f)) |
7306 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
7307 | ||
7308 | if (m) | |
7309 | { | |
1e313f28 | 7310 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
7311 | if (minibuffer_auto_raise) |
7312 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
7313 | } | |
7314 | else | |
c6e89d6c | 7315 | clear_message (1, 1); |
5f5c8ee5 | 7316 | |
c6e89d6c | 7317 | do_pending_window_change (0); |
5f5c8ee5 | 7318 | echo_area_display (1); |
c6e89d6c | 7319 | do_pending_window_change (0); |
5f5c8ee5 GM |
7320 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
7321 | (*frame_up_to_date_hook) (f); | |
7322 | } | |
7323 | } | |
7324 | ||
7325 | ||
c6e89d6c GM |
7326 | /* Display an echo area message M with a specified length of NBYTES |
7327 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 | 7328 | string, clear out any existing message, and let the mini-buffer |
0644322d RS |
7329 | text show through. |
7330 | ||
7331 | This function cancels echoing. */ | |
5f5c8ee5 GM |
7332 | |
7333 | void | |
c6e89d6c | 7334 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 7335 | Lisp_Object m; |
c6e89d6c | 7336 | int nbytes; |
5f5c8ee5 GM |
7337 | int multibyte; |
7338 | { | |
7339 | struct gcpro gcpro1; | |
7340 | ||
7341 | GCPRO1 (m); | |
802c6e56 | 7342 | clear_message (1,1); |
0644322d | 7343 | cancel_echoing (); |
2311178e | 7344 | |
5f5c8ee5 GM |
7345 | /* First flush out any partial line written with print. */ |
7346 | message_log_maybe_newline (); | |
7347 | if (STRINGP (m)) | |
e4dd3419 KS |
7348 | { |
7349 | char *buffer; | |
7350 | USE_SAFE_ALLOCA; | |
7351 | ||
7352 | SAFE_ALLOCA (buffer, char *, nbytes); | |
7353 | bcopy (SDATA (m), buffer, nbytes); | |
7354 | message_dolog (buffer, nbytes, 1, multibyte); | |
7355 | SAFE_FREE (); | |
7356 | } | |
c6e89d6c | 7357 | message3_nolog (m, nbytes, multibyte); |
5f5c8ee5 GM |
7358 | |
7359 | UNGCPRO; | |
7360 | } | |
7361 | ||
7362 | ||
0644322d RS |
7363 | /* The non-logging version of message3. |
7364 | This does not cancel echoing, because it is used for echoing. | |
7365 | Perhaps we need to make a separate function for echoing | |
7366 | and make this cancel echoing. */ | |
5f5c8ee5 GM |
7367 | |
7368 | void | |
c6e89d6c | 7369 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 7370 | Lisp_Object m; |
c6e89d6c | 7371 | int nbytes, multibyte; |
5f5c8ee5 | 7372 | { |
886bd6f2 | 7373 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
7374 | message_enable_multibyte = multibyte; |
7375 | ||
7376 | if (noninteractive) | |
7377 | { | |
7378 | if (noninteractive_need_newline) | |
7379 | putc ('\n', stderr); | |
7380 | noninteractive_need_newline = 0; | |
7381 | if (STRINGP (m)) | |
2051c264 | 7382 | fwrite (SDATA (m), nbytes, 1, stderr); |
5f5c8ee5 GM |
7383 | if (cursor_in_echo_area == 0) |
7384 | fprintf (stderr, "\n"); | |
7385 | fflush (stderr); | |
7386 | } | |
7387 | /* A null message buffer means that the frame hasn't really been | |
7388 | initialized yet. Error messages get reported properly by | |
7389 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 7390 | else if (INTERACTIVE |
886bd6f2 GM |
7391 | && sf->glyphs_initialized_p |
7392 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
7393 | { |
7394 | Lisp_Object mini_window; | |
c6e89d6c | 7395 | Lisp_Object frame; |
5f5c8ee5 GM |
7396 | struct frame *f; |
7397 | ||
7398 | /* Get the frame containing the mini-buffer | |
7399 | that the selected frame is using. */ | |
886bd6f2 | 7400 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7401 | frame = XWINDOW (mini_window)->frame; |
7402 | f = XFRAME (frame); | |
5f5c8ee5 GM |
7403 | |
7404 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 7405 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
7406 | && !FRAME_VISIBLE_P (f)) |
7407 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 7408 | |
2051c264 | 7409 | if (STRINGP (m) && SCHARS (m) > 0) |
5f5c8ee5 | 7410 | { |
c6e89d6c | 7411 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
7412 | if (minibuffer_auto_raise) |
7413 | Fraise_frame (frame); | |
2eca855f RS |
7414 | /* Assume we are not echoing. |
7415 | (If we are, echo_now will override this.) */ | |
7416 | echo_message_buffer = Qnil; | |
5f5c8ee5 GM |
7417 | } |
7418 | else | |
c6e89d6c | 7419 | clear_message (1, 1); |
5f5c8ee5 | 7420 | |
c6e89d6c | 7421 | do_pending_window_change (0); |
5f5c8ee5 | 7422 | echo_area_display (1); |
c6e89d6c | 7423 | do_pending_window_change (0); |
5f5c8ee5 GM |
7424 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
7425 | (*frame_up_to_date_hook) (f); | |
7426 | } | |
7427 | } | |
7428 | ||
7429 | ||
7430 | /* Display a null-terminated echo area message M. If M is 0, clear | |
7431 | out any existing message, and let the mini-buffer text show through. | |
7432 | ||
7433 | The buffer M must continue to exist until after the echo area gets | |
7434 | cleared or some other message gets displayed there. Do not pass | |
7435 | text that is stored in a Lisp string. Do not pass text in a buffer | |
7436 | that was alloca'd. */ | |
7437 | ||
7438 | void | |
7439 | message1 (m) | |
7440 | char *m; | |
7441 | { | |
7442 | message2 (m, (m ? strlen (m) : 0), 0); | |
7443 | } | |
7444 | ||
7445 | ||
7446 | /* The non-logging counterpart of message1. */ | |
7447 | ||
7448 | void | |
7449 | message1_nolog (m) | |
7450 | char *m; | |
7451 | { | |
7452 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
7453 | } | |
7454 | ||
7455 | /* Display a message M which contains a single %s | |
7456 | which gets replaced with STRING. */ | |
7457 | ||
7458 | void | |
7459 | message_with_string (m, string, log) | |
7460 | char *m; | |
7461 | Lisp_Object string; | |
7462 | int log; | |
7463 | { | |
5b6d51b6 RS |
7464 | CHECK_STRING (string); |
7465 | ||
5f5c8ee5 GM |
7466 | if (noninteractive) |
7467 | { | |
7468 | if (m) | |
7469 | { | |
7470 | if (noninteractive_need_newline) | |
7471 | putc ('\n', stderr); | |
7472 | noninteractive_need_newline = 0; | |
2051c264 | 7473 | fprintf (stderr, m, SDATA (string)); |
5f5c8ee5 GM |
7474 | if (cursor_in_echo_area == 0) |
7475 | fprintf (stderr, "\n"); | |
7476 | fflush (stderr); | |
7477 | } | |
7478 | } | |
7479 | else if (INTERACTIVE) | |
7480 | { | |
7481 | /* The frame whose minibuffer we're going to display the message on. | |
7482 | It may be larger than the selected frame, so we need | |
7483 | to use its buffer, not the selected frame's buffer. */ | |
7484 | Lisp_Object mini_window; | |
886bd6f2 | 7485 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
7486 | |
7487 | /* Get the frame containing the minibuffer | |
7488 | that the selected frame is using. */ | |
886bd6f2 | 7489 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
7490 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
7491 | ||
7492 | /* A null message buffer means that the frame hasn't really been | |
7493 | initialized yet. Error messages get reported properly by | |
7494 | cmd_error, so this must be just an informative message; toss it. */ | |
7495 | if (FRAME_MESSAGE_BUF (f)) | |
7496 | { | |
eb484132 GM |
7497 | Lisp_Object args[2], message; |
7498 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 7499 | |
eb484132 GM |
7500 | args[0] = build_string (m); |
7501 | args[1] = message = string; | |
78e17433 | 7502 | GCPRO2 (args[0], message); |
eb484132 | 7503 | gcpro1.nvars = 2; |
2311178e | 7504 | |
eb484132 | 7505 | message = Fformat (2, args); |
5f5c8ee5 GM |
7506 | |
7507 | if (log) | |
d5db4077 | 7508 | message3 (message, SBYTES (message), STRING_MULTIBYTE (message)); |
5f5c8ee5 | 7509 | else |
d5db4077 | 7510 | message3_nolog (message, SBYTES (message), STRING_MULTIBYTE (message)); |
eb484132 GM |
7511 | |
7512 | UNGCPRO; | |
5f5c8ee5 GM |
7513 | |
7514 | /* Print should start at the beginning of the message | |
7515 | buffer next time. */ | |
7516 | message_buf_print = 0; | |
7517 | } | |
7518 | } | |
7519 | } | |
7520 | ||
7521 | ||
5f5c8ee5 GM |
7522 | /* Dump an informative message to the minibuf. If M is 0, clear out |
7523 | any existing message, and let the mini-buffer text show through. */ | |
7524 | ||
7525 | /* VARARGS 1 */ | |
7526 | void | |
7527 | message (m, a1, a2, a3) | |
7528 | char *m; | |
7529 | EMACS_INT a1, a2, a3; | |
7530 | { | |
7531 | if (noninteractive) | |
7532 | { | |
7533 | if (m) | |
7534 | { | |
7535 | if (noninteractive_need_newline) | |
7536 | putc ('\n', stderr); | |
7537 | noninteractive_need_newline = 0; | |
7538 | fprintf (stderr, m, a1, a2, a3); | |
7539 | if (cursor_in_echo_area == 0) | |
7540 | fprintf (stderr, "\n"); | |
7541 | fflush (stderr); | |
7542 | } | |
7543 | } | |
7544 | else if (INTERACTIVE) | |
7545 | { | |
7546 | /* The frame whose mini-buffer we're going to display the message | |
7547 | on. It may be larger than the selected frame, so we need to | |
7548 | use its buffer, not the selected frame's buffer. */ | |
7549 | Lisp_Object mini_window; | |
886bd6f2 | 7550 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
7551 | |
7552 | /* Get the frame containing the mini-buffer | |
7553 | that the selected frame is using. */ | |
886bd6f2 | 7554 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
7555 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
7556 | ||
7557 | /* A null message buffer means that the frame hasn't really been | |
7558 | initialized yet. Error messages get reported properly by | |
7559 | cmd_error, so this must be just an informative message; toss | |
7560 | it. */ | |
7561 | if (FRAME_MESSAGE_BUF (f)) | |
7562 | { | |
7563 | if (m) | |
7564 | { | |
7565 | int len; | |
7566 | #ifdef NO_ARG_ARRAY | |
7567 | char *a[3]; | |
7568 | a[0] = (char *) a1; | |
7569 | a[1] = (char *) a2; | |
7570 | a[2] = (char *) a3; | |
7571 | ||
7572 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
7573 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
7574 | #else | |
7575 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
7576 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
7577 | (char **) &a1); | |
7578 | #endif /* NO_ARG_ARRAY */ | |
7579 | ||
7580 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
7581 | } | |
7582 | else | |
7583 | message1 (0); | |
7584 | ||
7585 | /* Print should start at the beginning of the message | |
7586 | buffer next time. */ | |
7587 | message_buf_print = 0; | |
7588 | } | |
7589 | } | |
7590 | } | |
7591 | ||
7592 | ||
7593 | /* The non-logging version of message. */ | |
7594 | ||
7595 | void | |
7596 | message_nolog (m, a1, a2, a3) | |
7597 | char *m; | |
7598 | EMACS_INT a1, a2, a3; | |
7599 | { | |
7600 | Lisp_Object old_log_max; | |
7601 | old_log_max = Vmessage_log_max; | |
7602 | Vmessage_log_max = Qnil; | |
7603 | message (m, a1, a2, a3); | |
7604 | Vmessage_log_max = old_log_max; | |
7605 | } | |
7606 | ||
7607 | ||
c6e89d6c GM |
7608 | /* Display the current message in the current mini-buffer. This is |
7609 | only called from error handlers in process.c, and is not time | |
7610 | critical. */ | |
5f5c8ee5 GM |
7611 | |
7612 | void | |
7613 | update_echo_area () | |
7614 | { | |
c6e89d6c GM |
7615 | if (!NILP (echo_area_buffer[0])) |
7616 | { | |
7617 | Lisp_Object string; | |
7618 | string = Fcurrent_message (); | |
2311178e | 7619 | message3 (string, SBYTES (string), |
c6e89d6c GM |
7620 | !NILP (current_buffer->enable_multibyte_characters)); |
7621 | } | |
7622 | } | |
7623 | ||
7624 | ||
a67e162b RS |
7625 | /* Make sure echo area buffers in `echo_buffers' are live. |
7626 | If they aren't, make new ones. */ | |
5bcfeb49 GM |
7627 | |
7628 | static void | |
7629 | ensure_echo_area_buffers () | |
7630 | { | |
7631 | int i; | |
7632 | ||
7633 | for (i = 0; i < 2; ++i) | |
7634 | if (!BUFFERP (echo_buffer[i]) | |
7635 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
7636 | { | |
7637 | char name[30]; | |
ff3d9573 GM |
7638 | Lisp_Object old_buffer; |
7639 | int j; | |
7640 | ||
7641 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
7642 | sprintf (name, " *Echo Area %d*", i); |
7643 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 7644 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
7645 | |
7646 | for (j = 0; j < 2; ++j) | |
7647 | if (EQ (old_buffer, echo_area_buffer[j])) | |
7648 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
7649 | } |
7650 | } | |
7651 | ||
7652 | ||
23a96c77 | 7653 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
7654 | echo_area_buffer as current buffer. |
7655 | ||
7656 | WHICH zero means use the current message buffer | |
7657 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
7658 | from echo_buffer[] and clear it. | |
7659 | ||
7660 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
7661 | suitable buffer from echo_buffer[] and clear it. | |
7662 | ||
4b41cebb | 7663 | Value is what FN returns. */ |
c6e89d6c GM |
7664 | |
7665 | static int | |
23a96c77 | 7666 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
7667 | struct window *w; |
7668 | int which; | |
23dd2d97 KR |
7669 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
7670 | EMACS_INT a1; | |
7671 | Lisp_Object a2; | |
7672 | EMACS_INT a3, a4; | |
c6e89d6c GM |
7673 | { |
7674 | Lisp_Object buffer; | |
15e26c76 | 7675 | int this_one, the_other, clear_buffer_p, rc; |
331379bf | 7676 | int count = SPECPDL_INDEX (); |
c6e89d6c | 7677 | |
9583b2bb | 7678 | /* If buffers aren't live, make new ones. */ |
5bcfeb49 | 7679 | ensure_echo_area_buffers (); |
c6e89d6c GM |
7680 | |
7681 | clear_buffer_p = 0; | |
2311178e | 7682 | |
c6e89d6c GM |
7683 | if (which == 0) |
7684 | this_one = 0, the_other = 1; | |
7685 | else if (which > 0) | |
7686 | this_one = 1, the_other = 0; | |
c6e89d6c GM |
7687 | |
7688 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
7689 | have one. */ | |
7690 | if (NILP (echo_area_buffer[this_one])) | |
7691 | { | |
7692 | echo_area_buffer[this_one] | |
7693 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
7694 | ? echo_buffer[the_other] | |
7695 | : echo_buffer[this_one]); | |
7696 | clear_buffer_p = 1; | |
7697 | } | |
7698 | ||
7699 | buffer = echo_area_buffer[this_one]; | |
7700 | ||
1013f4e3 GM |
7701 | /* Don't get confused by reusing the buffer used for echoing |
7702 | for a different purpose. */ | |
032906b1 | 7703 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
7704 | cancel_echoing (); |
7705 | ||
c6e89d6c GM |
7706 | record_unwind_protect (unwind_with_echo_area_buffer, |
7707 | with_echo_area_buffer_unwind_data (w)); | |
7708 | ||
7709 | /* Make the echo area buffer current. Note that for display | |
7710 | purposes, it is not necessary that the displayed window's buffer | |
7711 | == current_buffer, except for text property lookup. So, let's | |
7712 | only set that buffer temporarily here without doing a full | |
7713 | Fset_window_buffer. We must also change w->pointm, though, | |
7714 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
7715 | aborts. */ | |
9142dd5b | 7716 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
7717 | if (w) |
7718 | { | |
7719 | w->buffer = buffer; | |
7720 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
7721 | } | |
ad4f174e | 7722 | |
c6e89d6c GM |
7723 | current_buffer->undo_list = Qt; |
7724 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 7725 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 7726 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
7727 | |
7728 | if (clear_buffer_p && Z > BEG) | |
7729 | del_range (BEG, Z); | |
7730 | ||
7731 | xassert (BEGV >= BEG); | |
7732 | xassert (ZV <= Z && ZV >= BEGV); | |
7733 | ||
23a96c77 | 7734 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
7735 | |
7736 | xassert (BEGV >= BEG); | |
7737 | xassert (ZV <= Z && ZV >= BEGV); | |
7738 | ||
7739 | unbind_to (count, Qnil); | |
7740 | return rc; | |
5f5c8ee5 GM |
7741 | } |
7742 | ||
7743 | ||
c6e89d6c GM |
7744 | /* Save state that should be preserved around the call to the function |
7745 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 7746 | |
c6e89d6c GM |
7747 | static Lisp_Object |
7748 | with_echo_area_buffer_unwind_data (w) | |
7749 | struct window *w; | |
5f5c8ee5 | 7750 | { |
c6e89d6c GM |
7751 | int i = 0; |
7752 | Lisp_Object vector; | |
5f5c8ee5 | 7753 | |
c6e89d6c GM |
7754 | /* Reduce consing by keeping one vector in |
7755 | Vwith_echo_area_save_vector. */ | |
7756 | vector = Vwith_echo_area_save_vector; | |
7757 | Vwith_echo_area_save_vector = Qnil; | |
2311178e | 7758 | |
c6e89d6c | 7759 | if (NILP (vector)) |
9142dd5b | 7760 | vector = Fmake_vector (make_number (7), Qnil); |
2311178e | 7761 | |
a61b7058 GM |
7762 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
7763 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
7764 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
2311178e | 7765 | |
c6e89d6c GM |
7766 | if (w) |
7767 | { | |
a61b7058 GM |
7768 | XSETWINDOW (AREF (vector, i), w); ++i; |
7769 | AREF (vector, i) = w->buffer; ++i; | |
7770 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
7771 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
7772 | } |
7773 | else | |
7774 | { | |
7775 | int end = i + 4; | |
a61b7058 GM |
7776 | for (; i < end; ++i) |
7777 | AREF (vector, i) = Qnil; | |
c6e89d6c | 7778 | } |
5f5c8ee5 | 7779 | |
a61b7058 | 7780 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
7781 | return vector; |
7782 | } | |
5f5c8ee5 | 7783 | |
5f5c8ee5 | 7784 | |
c6e89d6c GM |
7785 | /* Restore global state from VECTOR which was created by |
7786 | with_echo_area_buffer_unwind_data. */ | |
7787 | ||
7788 | static Lisp_Object | |
7789 | unwind_with_echo_area_buffer (vector) | |
7790 | Lisp_Object vector; | |
7791 | { | |
bbbf6d06 GM |
7792 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
7793 | Vdeactivate_mark = AREF (vector, 1); | |
7794 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 7795 | |
bbbf6d06 | 7796 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
7797 | { |
7798 | struct window *w; | |
7799 | Lisp_Object buffer, charpos, bytepos; | |
2311178e | 7800 | |
bbbf6d06 GM |
7801 | w = XWINDOW (AREF (vector, 3)); |
7802 | buffer = AREF (vector, 4); | |
7803 | charpos = AREF (vector, 5); | |
7804 | bytepos = AREF (vector, 6); | |
2311178e | 7805 | |
c6e89d6c GM |
7806 | w->buffer = buffer; |
7807 | set_marker_both (w->pointm, buffer, | |
7808 | XFASTINT (charpos), XFASTINT (bytepos)); | |
7809 | } | |
7810 | ||
7811 | Vwith_echo_area_save_vector = vector; | |
7812 | return Qnil; | |
7813 | } | |
7814 | ||
7815 | ||
7816 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
7817 | non-zero means we will print multibyte. */ | |
7818 | ||
7819 | void | |
7820 | setup_echo_area_for_printing (multibyte_p) | |
7821 | int multibyte_p; | |
7822 | { | |
03b0a4b4 RS |
7823 | /* If we can't find an echo area any more, exit. */ |
7824 | if (! FRAME_LIVE_P (XFRAME (selected_frame))) | |
7825 | Fkill_emacs (Qnil); | |
7826 | ||
5bcfeb49 GM |
7827 | ensure_echo_area_buffers (); |
7828 | ||
c6e89d6c GM |
7829 | if (!message_buf_print) |
7830 | { | |
7831 | /* A message has been output since the last time we printed. | |
7832 | Choose a fresh echo area buffer. */ | |
7833 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 7834 | echo_area_buffer[0] = echo_buffer[1]; |
c6e89d6c GM |
7835 | else |
7836 | echo_area_buffer[0] = echo_buffer[0]; | |
7837 | ||
7838 | /* Switch to that buffer and clear it. */ | |
7839 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 7840 | current_buffer->truncate_lines = Qnil; |
2311178e | 7841 | |
c6e89d6c | 7842 | if (Z > BEG) |
bbbf6d06 | 7843 | { |
331379bf | 7844 | int count = SPECPDL_INDEX (); |
bbbf6d06 | 7845 | specbind (Qinhibit_read_only, Qt); |
a67e162b | 7846 | /* Note that undo recording is always disabled. */ |
bbbf6d06 GM |
7847 | del_range (BEG, Z); |
7848 | unbind_to (count, Qnil); | |
7849 | } | |
c6e89d6c GM |
7850 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
7851 | ||
7852 | /* Set up the buffer for the multibyteness we need. */ | |
7853 | if (multibyte_p | |
7854 | != !NILP (current_buffer->enable_multibyte_characters)) | |
7855 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
7856 | ||
7857 | /* Raise the frame containing the echo area. */ | |
7858 | if (minibuffer_auto_raise) | |
7859 | { | |
886bd6f2 | 7860 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7861 | Lisp_Object mini_window; |
886bd6f2 | 7862 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7863 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
7864 | } | |
7865 | ||
8a4e3c0c | 7866 | message_log_maybe_newline (); |
c6e89d6c GM |
7867 | message_buf_print = 1; |
7868 | } | |
fa77249f GM |
7869 | else |
7870 | { | |
7871 | if (NILP (echo_area_buffer[0])) | |
7872 | { | |
7873 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 7874 | echo_area_buffer[0] = echo_buffer[1]; |
fa77249f GM |
7875 | else |
7876 | echo_area_buffer[0] = echo_buffer[0]; | |
7877 | } | |
2311178e | 7878 | |
fa77249f | 7879 | if (current_buffer != XBUFFER (echo_area_buffer[0])) |
ab2c5f0a GM |
7880 | { |
7881 | /* Someone switched buffers between print requests. */ | |
7882 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
7883 | current_buffer->truncate_lines = Qnil; | |
7884 | } | |
fa77249f | 7885 | } |
c6e89d6c GM |
7886 | } |
7887 | ||
7888 | ||
dd2eb166 GM |
7889 | /* Display an echo area message in window W. Value is non-zero if W's |
7890 | height is changed. If display_last_displayed_message_p is | |
7891 | non-zero, display the message that was last displayed, otherwise | |
7892 | display the current message. */ | |
c6e89d6c GM |
7893 | |
7894 | static int | |
7895 | display_echo_area (w) | |
7896 | struct window *w; | |
7897 | { | |
25edb08f GM |
7898 | int i, no_message_p, window_height_changed_p, count; |
7899 | ||
7900 | /* Temporarily disable garbage collections while displaying the echo | |
7901 | area. This is done because a GC can print a message itself. | |
7902 | That message would modify the echo area buffer's contents while a | |
7903 | redisplay of the buffer is going on, and seriously confuse | |
7904 | redisplay. */ | |
7905 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
7906 | |
7907 | /* If there is no message, we must call display_echo_area_1 | |
7908 | nevertheless because it resizes the window. But we will have to | |
7909 | reset the echo_area_buffer in question to nil at the end because | |
7910 | with_echo_area_buffer will sets it to an empty buffer. */ | |
7911 | i = display_last_displayed_message_p ? 1 : 0; | |
7912 | no_message_p = NILP (echo_area_buffer[i]); | |
2311178e | 7913 | |
dd2eb166 GM |
7914 | window_height_changed_p |
7915 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 7916 | display_echo_area_1, |
23dd2d97 | 7917 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
7918 | |
7919 | if (no_message_p) | |
7920 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
7921 | |
7922 | unbind_to (count, Qnil); | |
dd2eb166 | 7923 | return window_height_changed_p; |
c6e89d6c GM |
7924 | } |
7925 | ||
7926 | ||
7927 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
7928 | contains the current echo area message in window W, a mini-window, |
7929 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
7930 | Change the height of W so that all of the message is displayed. |
7931 | Value is non-zero if height of W was changed. */ | |
7932 | ||
7933 | static int | |
23a96c77 | 7934 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
7935 | EMACS_INT a1; |
7936 | Lisp_Object a2; | |
7937 | EMACS_INT a3, a4; | |
c6e89d6c | 7938 | { |
23a96c77 | 7939 | struct window *w = (struct window *) a1; |
c6e89d6c | 7940 | Lisp_Object window; |
c6e89d6c GM |
7941 | struct text_pos start; |
7942 | int window_height_changed_p = 0; | |
7943 | ||
7944 | /* Do this before displaying, so that we have a large enough glyph | |
40b388f9 RS |
7945 | matrix for the display. If we can't get enough space for the |
7946 | whole text, display the last N lines. That works by setting w->start. */ | |
92a90e89 | 7947 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c | 7948 | |
40b388f9 RS |
7949 | /* Use the starting position chosen by resize_mini_window. */ |
7950 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
7951 | ||
c6e89d6c GM |
7952 | /* Display. */ |
7953 | clear_glyph_matrix (w->desired_matrix); | |
7954 | XSETWINDOW (window, w); | |
493c1d49 | 7955 | try_window (window, start, 0); |
c6e89d6c | 7956 | |
c6e89d6c GM |
7957 | return window_height_changed_p; |
7958 | } | |
7959 | ||
7960 | ||
92a90e89 | 7961 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
7962 | currently displayed message, if there is one. If a mini-buffer |
7963 | is active, don't shrink it. */ | |
92a90e89 GM |
7964 | |
7965 | void | |
308a74d8 | 7966 | resize_echo_area_exactly () |
92a90e89 GM |
7967 | { |
7968 | if (BUFFERP (echo_area_buffer[0]) | |
7969 | && WINDOWP (echo_area_window)) | |
7970 | { | |
7971 | struct window *w = XWINDOW (echo_area_window); | |
7972 | int resized_p; | |
6d004fea GM |
7973 | Lisp_Object resize_exactly; |
7974 | ||
7975 | if (minibuf_level == 0) | |
7976 | resize_exactly = Qt; | |
7977 | else | |
7978 | resize_exactly = Qnil; | |
2311178e | 7979 | |
23a96c77 | 7980 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 7981 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
7982 | if (resized_p) |
7983 | { | |
7984 | ++windows_or_buffers_changed; | |
7985 | ++update_mode_lines; | |
7986 | redisplay_internal (0); | |
7987 | } | |
7988 | } | |
7989 | } | |
7990 | ||
7991 | ||
23a96c77 | 7992 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 7993 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
7994 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
7995 | size of the text displayed. A3 and A4 are not used. Value is what | |
7996 | resize_mini_window returns. */ | |
23a96c77 GM |
7997 | |
7998 | static int | |
6d004fea | 7999 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 8000 | EMACS_INT a1; |
6d004fea | 8001 | Lisp_Object exactly; |
23dd2d97 | 8002 | EMACS_INT a3, a4; |
23a96c77 | 8003 | { |
6d004fea | 8004 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
8005 | } |
8006 | ||
8007 | ||
92a90e89 GM |
8008 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
8009 | means size the window exactly to the size needed. Otherwise, it's | |
40b388f9 | 8010 | only enlarged until W's buffer is empty. |
f6c05015 | 8011 | |
40b388f9 RS |
8012 | Set W->start to the right place to begin display. If the whole |
8013 | contents fit, start at the beginning. Otherwise, start so as | |
8014 | to make the end of the contents appear. This is particularly | |
8015 | important for y-or-n-p, but seems desirable generally. | |
8016 | ||
8017 | Value is non-zero if the window height has been changed. */ | |
c6e89d6c | 8018 | |
9472f927 | 8019 | int |
92a90e89 | 8020 | resize_mini_window (w, exact_p) |
c6e89d6c | 8021 | struct window *w; |
92a90e89 | 8022 | int exact_p; |
c6e89d6c GM |
8023 | { |
8024 | struct frame *f = XFRAME (w->frame); | |
8025 | int window_height_changed_p = 0; | |
8026 | ||
8027 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 8028 | |
40b388f9 RS |
8029 | /* By default, start display at the beginning. */ |
8030 | set_marker_both (w->start, w->buffer, | |
8031 | BUF_BEGV (XBUFFER (w->buffer)), | |
8032 | BUF_BEGV_BYTE (XBUFFER (w->buffer))); | |
8033 | ||
2913a9c0 GM |
8034 | /* Don't resize windows while redisplaying a window; it would |
8035 | confuse redisplay functions when the size of the window they are | |
8036 | displaying changes from under them. Such a resizing can happen, | |
8037 | for instance, when which-func prints a long message while | |
8038 | we are running fontification-functions. We're running these | |
8039 | functions with safe_call which binds inhibit-redisplay to t. */ | |
8040 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 | 8041 | return 0; |
2311178e | 8042 | |
97cafc0f | 8043 | /* Nil means don't try to resize. */ |
6422c1d7 | 8044 | if (NILP (Vresize_mini_windows) |
fa3c6b4d | 8045 | || (FRAME_X_P (f) && FRAME_X_OUTPUT (f) == NULL)) |
97cafc0f | 8046 | return 0; |
2311178e | 8047 | |
c6e89d6c GM |
8048 | if (!FRAME_MINIBUF_ONLY_P (f)) |
8049 | { | |
8050 | struct it it; | |
dd2eb166 | 8051 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
da8b7f4f | 8052 | int total_height = WINDOW_TOTAL_LINES (root) + WINDOW_TOTAL_LINES (w); |
dd2eb166 | 8053 | int height, max_height; |
da8b7f4f | 8054 | int unit = FRAME_LINE_HEIGHT (f); |
dd2eb166 | 8055 | struct text_pos start; |
1bfdbe43 GM |
8056 | struct buffer *old_current_buffer = NULL; |
8057 | ||
8058 | if (current_buffer != XBUFFER (w->buffer)) | |
8059 | { | |
8060 | old_current_buffer = current_buffer; | |
8061 | set_buffer_internal (XBUFFER (w->buffer)); | |
8062 | } | |
9142dd5b | 8063 | |
c6e89d6c | 8064 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 8065 | |
dd2eb166 GM |
8066 | /* Compute the max. number of lines specified by the user. */ |
8067 | if (FLOATP (Vmax_mini_window_height)) | |
da8b7f4f | 8068 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_LINES (f); |
dd2eb166 GM |
8069 | else if (INTEGERP (Vmax_mini_window_height)) |
8070 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
8071 | else |
8072 | max_height = total_height / 4; | |
2311178e | 8073 | |
4b41cebb | 8074 | /* Correct that max. height if it's bogus. */ |
dd2eb166 GM |
8075 | max_height = max (1, max_height); |
8076 | max_height = min (total_height, max_height); | |
2311178e | 8077 | |
dd2eb166 | 8078 | /* Find out the height of the text in the window. */ |
ad4f174e GM |
8079 | if (it.truncate_lines_p) |
8080 | height = 1; | |
55b064bd | 8081 | else |
ad4f174e GM |
8082 | { |
8083 | last_height = 0; | |
8084 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
8085 | if (it.max_ascent == 0 && it.max_descent == 0) | |
8086 | height = it.current_y + last_height; | |
8087 | else | |
8088 | height = it.current_y + it.max_ascent + it.max_descent; | |
546f98b8 | 8089 | height -= min (it.extra_line_spacing, it.max_extra_line_spacing); |
ad4f174e GM |
8090 | height = (height + unit - 1) / unit; |
8091 | } | |
2311178e | 8092 | |
dd2eb166 GM |
8093 | /* Compute a suitable window start. */ |
8094 | if (height > max_height) | |
8095 | { | |
8096 | height = max_height; | |
40b388f9 | 8097 | init_iterator (&it, w, ZV, ZV_BYTE, NULL, DEFAULT_FACE_ID); |
dd2eb166 GM |
8098 | move_it_vertically_backward (&it, (height - 1) * unit); |
8099 | start = it.current.pos; | |
8100 | } | |
8101 | else | |
8102 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
8103 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 8104 | |
6422c1d7 | 8105 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 8106 | { |
6422c1d7 GM |
8107 | /* Let it grow only, until we display an empty message, in which |
8108 | case the window shrinks again. */ | |
da8b7f4f | 8109 | if (height > WINDOW_TOTAL_LINES (w)) |
6422c1d7 | 8110 | { |
da8b7f4f | 8111 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 | 8112 | freeze_window_starts (f, 1); |
da8b7f4f KS |
8113 | grow_mini_window (w, height - WINDOW_TOTAL_LINES (w)); |
8114 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; | |
6422c1d7 | 8115 | } |
da8b7f4f | 8116 | else if (height < WINDOW_TOTAL_LINES (w) |
6422c1d7 GM |
8117 | && (exact_p || BEGV == ZV)) |
8118 | { | |
da8b7f4f | 8119 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 GM |
8120 | freeze_window_starts (f, 0); |
8121 | shrink_mini_window (w); | |
da8b7f4f | 8122 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; |
6422c1d7 | 8123 | } |
da448723 | 8124 | } |
2311178e | 8125 | else |
da448723 | 8126 | { |
6422c1d7 | 8127 | /* Always resize to exact size needed. */ |
da8b7f4f | 8128 | if (height > WINDOW_TOTAL_LINES (w)) |
6422c1d7 | 8129 | { |
da8b7f4f | 8130 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 | 8131 | freeze_window_starts (f, 1); |
da8b7f4f KS |
8132 | grow_mini_window (w, height - WINDOW_TOTAL_LINES (w)); |
8133 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; | |
6422c1d7 | 8134 | } |
da8b7f4f | 8135 | else if (height < WINDOW_TOTAL_LINES (w)) |
6422c1d7 | 8136 | { |
da8b7f4f | 8137 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 GM |
8138 | freeze_window_starts (f, 0); |
8139 | shrink_mini_window (w); | |
8140 | ||
8141 | if (height) | |
8142 | { | |
8143 | freeze_window_starts (f, 1); | |
da8b7f4f | 8144 | grow_mini_window (w, height - WINDOW_TOTAL_LINES (w)); |
6422c1d7 | 8145 | } |
2311178e | 8146 | |
da8b7f4f | 8147 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; |
6422c1d7 | 8148 | } |
9142dd5b | 8149 | } |
1bfdbe43 GM |
8150 | |
8151 | if (old_current_buffer) | |
8152 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
8153 | } |
8154 | ||
8155 | return window_height_changed_p; | |
8156 | } | |
8157 | ||
8158 | ||
8159 | /* Value is the current message, a string, or nil if there is no | |
8160 | current message. */ | |
8161 | ||
8162 | Lisp_Object | |
8163 | current_message () | |
8164 | { | |
8165 | Lisp_Object msg; | |
8166 | ||
8167 | if (NILP (echo_area_buffer[0])) | |
8168 | msg = Qnil; | |
8169 | else | |
8170 | { | |
23a96c77 | 8171 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 8172 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
8173 | if (NILP (msg)) |
8174 | echo_area_buffer[0] = Qnil; | |
8175 | } | |
2311178e | 8176 | |
c6e89d6c GM |
8177 | return msg; |
8178 | } | |
8179 | ||
8180 | ||
8181 | static int | |
23a96c77 | 8182 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
8183 | EMACS_INT a1; |
8184 | Lisp_Object a2; | |
8185 | EMACS_INT a3, a4; | |
c6e89d6c | 8186 | { |
23a96c77 | 8187 | Lisp_Object *msg = (Lisp_Object *) a1; |
2311178e | 8188 | |
c6e89d6c GM |
8189 | if (Z > BEG) |
8190 | *msg = make_buffer_string (BEG, Z, 1); | |
8191 | else | |
8192 | *msg = Qnil; | |
8193 | return 0; | |
8194 | } | |
8195 | ||
8196 | ||
8197 | /* Push the current message on Vmessage_stack for later restauration | |
8198 | by restore_message. Value is non-zero if the current message isn't | |
8199 | empty. This is a relatively infrequent operation, so it's not | |
8200 | worth optimizing. */ | |
8201 | ||
8202 | int | |
8203 | push_message () | |
8204 | { | |
8205 | Lisp_Object msg; | |
8206 | msg = current_message (); | |
8207 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
8208 | return STRINGP (msg); | |
8209 | } | |
8210 | ||
8211 | ||
8212 | /* Restore message display from the top of Vmessage_stack. */ | |
8213 | ||
8214 | void | |
8215 | restore_message () | |
8216 | { | |
8217 | Lisp_Object msg; | |
2311178e | 8218 | |
c6e89d6c GM |
8219 | xassert (CONSP (Vmessage_stack)); |
8220 | msg = XCAR (Vmessage_stack); | |
8221 | if (STRINGP (msg)) | |
d5db4077 | 8222 | message3_nolog (msg, SBYTES (msg), STRING_MULTIBYTE (msg)); |
c6e89d6c GM |
8223 | else |
8224 | message3_nolog (msg, 0, 0); | |
8225 | } | |
8226 | ||
8227 | ||
37d66095 RS |
8228 | /* Handler for record_unwind_protect calling pop_message. */ |
8229 | ||
8230 | Lisp_Object | |
8231 | pop_message_unwind (dummy) | |
8232 | Lisp_Object dummy; | |
8233 | { | |
8234 | pop_message (); | |
8235 | return Qnil; | |
8236 | } | |
8237 | ||
c6e89d6c GM |
8238 | /* Pop the top-most entry off Vmessage_stack. */ |
8239 | ||
8240 | void | |
8241 | pop_message () | |
8242 | { | |
8243 | xassert (CONSP (Vmessage_stack)); | |
8244 | Vmessage_stack = XCDR (Vmessage_stack); | |
8245 | } | |
8246 | ||
8247 | ||
8248 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
8249 | exits. If the stack is not empty, we have a missing pop_message | |
8250 | somewhere. */ | |
8251 | ||
8252 | void | |
8253 | check_message_stack () | |
8254 | { | |
8255 | if (!NILP (Vmessage_stack)) | |
8256 | abort (); | |
8257 | } | |
8258 | ||
8259 | ||
8260 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
8261 | time we display it---but don't redisplay it now. */ | |
8262 | ||
8263 | void | |
8264 | truncate_echo_area (nchars) | |
8265 | int nchars; | |
8266 | { | |
8267 | if (nchars == 0) | |
8268 | echo_area_buffer[0] = Qnil; | |
8269 | /* A null message buffer means that the frame hasn't really been | |
8270 | initialized yet. Error messages get reported properly by | |
8271 | cmd_error, so this must be just an informative message; toss it. */ | |
8272 | else if (!noninteractive | |
8273 | && INTERACTIVE | |
c6e89d6c | 8274 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
8275 | { |
8276 | struct frame *sf = SELECTED_FRAME (); | |
8277 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 8278 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 8279 | } |
c6e89d6c GM |
8280 | } |
8281 | ||
8282 | ||
8283 | /* Helper function for truncate_echo_area. Truncate the current | |
8284 | message to at most NCHARS characters. */ | |
8285 | ||
8286 | static int | |
23a96c77 | 8287 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
8288 | EMACS_INT nchars; |
8289 | Lisp_Object a2; | |
8290 | EMACS_INT a3, a4; | |
c6e89d6c GM |
8291 | { |
8292 | if (BEG + nchars < Z) | |
8293 | del_range (BEG + nchars, Z); | |
8294 | if (Z == BEG) | |
8295 | echo_area_buffer[0] = Qnil; | |
8296 | return 0; | |
8297 | } | |
8298 | ||
8299 | ||
8300 | /* Set the current message to a substring of S or STRING. | |
8301 | ||
8302 | If STRING is a Lisp string, set the message to the first NBYTES | |
8303 | bytes from STRING. NBYTES zero means use the whole string. If | |
8304 | STRING is multibyte, the message will be displayed multibyte. | |
8305 | ||
8306 | If S is not null, set the message to the first LEN bytes of S. LEN | |
8307 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
f291069a KS |
8308 | multibyte. Display the message multibyte in that case. |
8309 | ||
8310 | Doesn't GC, as with_echo_area_buffer binds Qinhibit_modification_hooks | |
8311 | to t before calling set_message_1 (which calls insert). | |
8312 | */ | |
c6e89d6c GM |
8313 | |
8314 | void | |
8315 | set_message (s, string, nbytes, multibyte_p) | |
50f80c2f | 8316 | const char *s; |
c6e89d6c | 8317 | Lisp_Object string; |
e3383b6f | 8318 | int nbytes, multibyte_p; |
c6e89d6c GM |
8319 | { |
8320 | message_enable_multibyte | |
8321 | = ((s && multibyte_p) | |
8322 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
2311178e | 8323 | |
a8a1c0ee | 8324 | with_echo_area_buffer (0, 0, set_message_1, |
23a96c77 | 8325 | (EMACS_INT) s, string, nbytes, multibyte_p); |
c6e89d6c | 8326 | message_buf_print = 0; |
21fdfb65 | 8327 | help_echo_showing_p = 0; |
c6e89d6c GM |
8328 | } |
8329 | ||
8330 | ||
8331 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
8332 | as there, with A1 corresponding to S and A2 corresponding to STRING |
8333 | This function is called with the echo area buffer being | |
c6e89d6c GM |
8334 | current. */ |
8335 | ||
8336 | static int | |
23a96c77 | 8337 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
8338 | EMACS_INT a1; |
8339 | Lisp_Object a2; | |
8340 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 8341 | { |
50f80c2f | 8342 | const char *s = (const char *) a1; |
23dd2d97 | 8343 | Lisp_Object string = a2; |
2311178e | 8344 | |
c6e89d6c GM |
8345 | /* Change multibyteness of the echo buffer appropriately. */ |
8346 | if (message_enable_multibyte | |
8347 | != !NILP (current_buffer->enable_multibyte_characters)) | |
8348 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
8349 | ||
ad4f174e | 8350 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
2311178e | 8351 | |
c6e89d6c GM |
8352 | /* Insert new message at BEG. */ |
8353 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
a8a1c0ee | 8354 | Ferase_buffer (); |
c6e89d6c GM |
8355 | |
8356 | if (STRINGP (string)) | |
8357 | { | |
8358 | int nchars; | |
2311178e | 8359 | |
c6e89d6c | 8360 | if (nbytes == 0) |
2051c264 | 8361 | nbytes = SBYTES (string); |
c6e89d6c | 8362 | nchars = string_byte_to_char (string, nbytes); |
2311178e | 8363 | |
c6e89d6c GM |
8364 | /* This function takes care of single/multibyte conversion. We |
8365 | just have to ensure that the echo area buffer has the right | |
8366 | setting of enable_multibyte_characters. */ | |
8367 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
8368 | } | |
8369 | else if (s) | |
8370 | { | |
8371 | if (nbytes == 0) | |
8372 | nbytes = strlen (s); | |
2311178e | 8373 | |
c6e89d6c GM |
8374 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) |
8375 | { | |
8376 | /* Convert from multi-byte to single-byte. */ | |
8377 | int i, c, n; | |
8378 | unsigned char work[1]; | |
2311178e | 8379 | |
c6e89d6c GM |
8380 | /* Convert a multibyte string to single-byte. */ |
8381 | for (i = 0; i < nbytes; i += n) | |
8382 | { | |
8383 | c = string_char_and_length (s + i, nbytes - i, &n); | |
8384 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
8385 | ? c | |
8386 | : multibyte_char_to_unibyte (c, Qnil)); | |
8387 | insert_1_both (work, 1, 1, 1, 0, 0); | |
8388 | } | |
8389 | } | |
8390 | else if (!multibyte_p | |
8391 | && !NILP (current_buffer->enable_multibyte_characters)) | |
8392 | { | |
8393 | /* Convert from single-byte to multi-byte. */ | |
8394 | int i, c, n; | |
50f80c2f | 8395 | const unsigned char *msg = (const unsigned char *) s; |
260a86a0 | 8396 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2311178e | 8397 | |
c6e89d6c GM |
8398 | /* Convert a single-byte string to multibyte. */ |
8399 | for (i = 0; i < nbytes; i++) | |
8400 | { | |
8401 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
8402 | n = CHAR_STRING (c, str); |
8403 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
8404 | } |
8405 | } | |
8406 | else | |
8407 | insert_1 (s, nbytes, 1, 0, 0); | |
8408 | } | |
8409 | ||
8410 | return 0; | |
8411 | } | |
8412 | ||
8413 | ||
8414 | /* Clear messages. CURRENT_P non-zero means clear the current | |
8415 | message. LAST_DISPLAYED_P non-zero means clear the message | |
8416 | last displayed. */ | |
8417 | ||
8418 | void | |
8419 | clear_message (current_p, last_displayed_p) | |
8420 | int current_p, last_displayed_p; | |
8421 | { | |
8422 | if (current_p) | |
6e019995 GM |
8423 | { |
8424 | echo_area_buffer[0] = Qnil; | |
8425 | message_cleared_p = 1; | |
8426 | } | |
2311178e | 8427 | |
c6e89d6c GM |
8428 | if (last_displayed_p) |
8429 | echo_area_buffer[1] = Qnil; | |
2311178e | 8430 | |
c6e89d6c GM |
8431 | message_buf_print = 0; |
8432 | } | |
8433 | ||
8434 | /* Clear garbaged frames. | |
8435 | ||
8436 | This function is used where the old redisplay called | |
8437 | redraw_garbaged_frames which in turn called redraw_frame which in | |
8438 | turn called clear_frame. The call to clear_frame was a source of | |
8439 | flickering. I believe a clear_frame is not necessary. It should | |
8440 | suffice in the new redisplay to invalidate all current matrices, | |
8441 | and ensure a complete redisplay of all windows. */ | |
8442 | ||
8443 | static void | |
8444 | clear_garbaged_frames () | |
8445 | { | |
5f5c8ee5 GM |
8446 | if (frame_garbaged) |
8447 | { | |
5f5c8ee5 | 8448 | Lisp_Object tail, frame; |
5fb96e96 | 8449 | int changed_count = 0; |
2311178e | 8450 | |
5f5c8ee5 GM |
8451 | FOR_EACH_FRAME (tail, frame) |
8452 | { | |
8453 | struct frame *f = XFRAME (frame); | |
2311178e | 8454 | |
5f5c8ee5 GM |
8455 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) |
8456 | { | |
6bb95882 | 8457 | if (f->resized_p) |
6d925726 KS |
8458 | { |
8459 | Fredraw_frame (frame); | |
8460 | f->force_flush_display_p = 1; | |
8461 | } | |
5f5c8ee5 | 8462 | clear_current_matrices (f); |
5fb96e96 | 8463 | changed_count++; |
5f5c8ee5 | 8464 | f->garbaged = 0; |
6bb95882 | 8465 | f->resized_p = 0; |
5f5c8ee5 GM |
8466 | } |
8467 | } | |
8468 | ||
8469 | frame_garbaged = 0; | |
5fb96e96 RS |
8470 | if (changed_count) |
8471 | ++windows_or_buffers_changed; | |
5f5c8ee5 | 8472 | } |
c6e89d6c | 8473 | } |
5f5c8ee5 | 8474 | |
5f5c8ee5 | 8475 | |
886bd6f2 GM |
8476 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
8477 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 8478 | mini-windows height has been changed. */ |
5f5c8ee5 | 8479 | |
c6e89d6c GM |
8480 | static int |
8481 | echo_area_display (update_frame_p) | |
8482 | int update_frame_p; | |
8483 | { | |
8484 | Lisp_Object mini_window; | |
8485 | struct window *w; | |
8486 | struct frame *f; | |
8487 | int window_height_changed_p = 0; | |
886bd6f2 | 8488 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 8489 | |
886bd6f2 | 8490 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
8491 | w = XWINDOW (mini_window); |
8492 | f = XFRAME (WINDOW_FRAME (w)); | |
8493 | ||
8494 | /* Don't display if frame is invisible or not yet initialized. */ | |
8495 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
8496 | return 0; | |
5f5c8ee5 | 8497 | |
1a578e9b | 8498 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
e0f712ba | 8499 | #ifndef MAC_OS8 |
1ab3e082 | 8500 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
8501 | /* When Emacs starts, selected_frame may be a visible terminal |
8502 | frame, even if we run under a window system. If we let this | |
8503 | through, a message would be displayed on the terminal. */ | |
2311178e | 8504 | if (EQ (selected_frame, Vterminal_frame) |
622e3754 | 8505 | && !NILP (Vwindow_system)) |
c6e89d6c | 8506 | return 0; |
1ab3e082 | 8507 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 8508 | #endif |
c6e89d6c GM |
8509 | |
8510 | /* Redraw garbaged frames. */ | |
8511 | if (frame_garbaged) | |
8512 | clear_garbaged_frames (); | |
8513 | ||
8514 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
8515 | { | |
8516 | echo_area_window = mini_window; | |
8517 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 8518 | w->must_be_updated_p = 1; |
c59c668a | 8519 | |
d4358b37 GM |
8520 | /* Update the display, unless called from redisplay_internal. |
8521 | Also don't update the screen during redisplay itself. The | |
8522 | update will happen at the end of redisplay, and an update | |
8523 | here could cause confusion. */ | |
8524 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 8525 | { |
715e84c9 | 8526 | int n = 0; |
edc68111 | 8527 | |
715e84c9 GM |
8528 | /* If the display update has been interrupted by pending |
8529 | input, update mode lines in the frame. Due to the | |
8530 | pending input, it might have been that redisplay hasn't | |
8531 | been called, so that mode lines above the echo area are | |
8532 | garbaged. This looks odd, so we prevent it here. */ | |
8533 | if (!display_completed) | |
8534 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
2311178e | 8535 | |
8af1308e GM |
8536 | if (window_height_changed_p |
8537 | /* Don't do this if Emacs is shutting down. Redisplay | |
8538 | needs to run hooks. */ | |
8539 | && !NILP (Vrun_hooks)) | |
c59c668a | 8540 | { |
c06017fb GM |
8541 | /* Must update other windows. Likewise as in other |
8542 | cases, don't let this update be interrupted by | |
8543 | pending input. */ | |
331379bf | 8544 | int count = SPECPDL_INDEX (); |
c06017fb | 8545 | specbind (Qredisplay_dont_pause, Qt); |
edc68111 | 8546 | windows_or_buffers_changed = 1; |
c59c668a | 8547 | redisplay_internal (0); |
c06017fb | 8548 | unbind_to (count, Qnil); |
c59c668a | 8549 | } |
715e84c9 | 8550 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 8551 | { |
edc68111 | 8552 | /* Window configuration is the same as before. |
715e84c9 GM |
8553 | Can do with a display update of the echo area, |
8554 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
8555 | update_single_window (w, 1); |
8556 | rif->flush_display (f); | |
8557 | } | |
8558 | else | |
8559 | update_frame (f, 1, 1); | |
31b6671b GM |
8560 | |
8561 | /* If cursor is in the echo area, make sure that the next | |
8562 | redisplay displays the minibuffer, so that the cursor will | |
8563 | be replaced with what the minibuffer wants. */ | |
8564 | if (cursor_in_echo_area) | |
8565 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
8566 | } |
8567 | } | |
8568 | else if (!EQ (mini_window, selected_window)) | |
8569 | windows_or_buffers_changed++; | |
c59c668a | 8570 | |
a8a1c0ee | 8571 | /* The current message is now also the last one displayed. */ |
dd2eb166 | 8572 | echo_area_buffer[1] = echo_area_buffer[0]; |
2311178e | 8573 | |
5f5c8ee5 GM |
8574 | /* Prevent redisplay optimization in redisplay_internal by resetting |
8575 | this_line_start_pos. This is done because the mini-buffer now | |
8576 | displays the message instead of its buffer text. */ | |
8577 | if (EQ (mini_window, selected_window)) | |
8578 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
8579 | |
8580 | return window_height_changed_p; | |
5f5c8ee5 GM |
8581 | } |
8582 | ||
8583 | ||
8584 | \f | |
8585 | /*********************************************************************** | |
4c0e4b80 | 8586 | Mode Lines and Frame Titles |
5f5c8ee5 GM |
8587 | ***********************************************************************/ |
8588 | ||
4c0e4b80 KS |
8589 | /* A buffer for constructing non-propertized mode-line strings and |
8590 | frame titles in it; allocated from the heap in init_xdisp and | |
8591 | resized as needed in store_mode_line_noprop_char. */ | |
5f5c8ee5 | 8592 | |
4c0e4b80 | 8593 | static char *mode_line_noprop_buf; |
5f5c8ee5 | 8594 | |
4c0e4b80 | 8595 | /* The buffer's end, and a current output position in it. */ |
5f5c8ee5 | 8596 | |
4c0e4b80 KS |
8597 | static char *mode_line_noprop_buf_end; |
8598 | static char *mode_line_noprop_ptr; | |
5f5c8ee5 | 8599 | |
d06e3847 KS |
8600 | #define MODE_LINE_NOPROP_LEN(start) \ |
8601 | ((mode_line_noprop_ptr - mode_line_noprop_buf) - start) | |
8602 | ||
4c0e4b80 KS |
8603 | static enum { |
8604 | MODE_LINE_DISPLAY = 0, | |
8605 | MODE_LINE_TITLE, | |
8606 | MODE_LINE_NOPROP, | |
8607 | MODE_LINE_STRING | |
8608 | } mode_line_target; | |
8609 | ||
8610 | /* Alist that caches the results of :propertize. | |
8611 | Each element is (PROPERTIZED-STRING . PROPERTY-LIST). */ | |
8612 | static Lisp_Object mode_line_proptrans_alist; | |
8613 | ||
8614 | /* List of strings making up the mode-line. */ | |
8615 | static Lisp_Object mode_line_string_list; | |
8616 | ||
8617 | /* Base face property when building propertized mode line string. */ | |
8618 | static Lisp_Object mode_line_string_face; | |
8619 | static Lisp_Object mode_line_string_face_prop; | |
8620 | ||
8621 | ||
8622 | /* Unwind data for mode line strings */ | |
8623 | ||
8624 | static Lisp_Object Vmode_line_unwind_vector; | |
8625 | ||
8626 | static Lisp_Object | |
f5b8d5f2 | 8627 | format_mode_line_unwind_data (obuf, save_proptrans) |
4c0e4b80 KS |
8628 | struct buffer *obuf; |
8629 | { | |
4c0e4b80 KS |
8630 | Lisp_Object vector; |
8631 | ||
8632 | /* Reduce consing by keeping one vector in | |
8633 | Vwith_echo_area_save_vector. */ | |
8634 | vector = Vmode_line_unwind_vector; | |
8635 | Vmode_line_unwind_vector = Qnil; | |
8636 | ||
8637 | if (NILP (vector)) | |
8638 | vector = Fmake_vector (make_number (7), Qnil); | |
8639 | ||
8640 | AREF (vector, 0) = make_number (mode_line_target); | |
d06e3847 | 8641 | AREF (vector, 1) = make_number (MODE_LINE_NOPROP_LEN (0)); |
4c0e4b80 | 8642 | AREF (vector, 2) = mode_line_string_list; |
f5b8d5f2 | 8643 | AREF (vector, 3) = (save_proptrans ? mode_line_proptrans_alist : Qt); |
4c0e4b80 KS |
8644 | AREF (vector, 4) = mode_line_string_face; |
8645 | AREF (vector, 5) = mode_line_string_face_prop; | |
8646 | ||
8647 | if (obuf) | |
8648 | XSETBUFFER (AREF (vector, 6), obuf); | |
8649 | else | |
8650 | AREF (vector, 6) = Qnil; | |
8651 | ||
8652 | return vector; | |
8653 | } | |
8654 | ||
8655 | static Lisp_Object | |
8656 | unwind_format_mode_line (vector) | |
8657 | Lisp_Object vector; | |
8658 | { | |
8659 | mode_line_target = XINT (AREF (vector, 0)); | |
8660 | mode_line_noprop_ptr = mode_line_noprop_buf + XINT (AREF (vector, 1)); | |
8661 | mode_line_string_list = AREF (vector, 2); | |
f5b8d5f2 RS |
8662 | if (! EQ (AREF (vector, 3), Qt)) |
8663 | mode_line_proptrans_alist = AREF (vector, 3); | |
4c0e4b80 KS |
8664 | mode_line_string_face = AREF (vector, 4); |
8665 | mode_line_string_face_prop = AREF (vector, 5); | |
5f5c8ee5 | 8666 | |
4c0e4b80 KS |
8667 | if (!NILP (AREF (vector, 6))) |
8668 | { | |
8669 | set_buffer_internal_1 (XBUFFER (AREF (vector, 6))); | |
8670 | AREF (vector, 6) = Qnil; | |
8671 | } | |
5f5c8ee5 | 8672 | |
4c0e4b80 KS |
8673 | Vmode_line_unwind_vector = vector; |
8674 | return Qnil; | |
8675 | } | |
5f5c8ee5 | 8676 | |
4c0e4b80 KS |
8677 | |
8678 | /* Store a single character C for the frame title in mode_line_noprop_buf. | |
8679 | Re-allocate mode_line_noprop_buf if necessary. */ | |
5f5c8ee5 GM |
8680 | |
8681 | static void | |
5d15cc8f | 8682 | #ifdef PROTOTYPES |
4c0e4b80 | 8683 | store_mode_line_noprop_char (char c) |
5d15cc8f | 8684 | #else |
4c0e4b80 | 8685 | store_mode_line_noprop_char (c) |
5f5c8ee5 | 8686 | char c; |
5d15cc8f | 8687 | #endif |
5f5c8ee5 GM |
8688 | { |
8689 | /* If output position has reached the end of the allocated buffer, | |
8690 | double the buffer's size. */ | |
4c0e4b80 | 8691 | if (mode_line_noprop_ptr == mode_line_noprop_buf_end) |
5f5c8ee5 | 8692 | { |
d06e3847 | 8693 | int len = MODE_LINE_NOPROP_LEN (0); |
4c0e4b80 KS |
8694 | int new_size = 2 * len * sizeof *mode_line_noprop_buf; |
8695 | mode_line_noprop_buf = (char *) xrealloc (mode_line_noprop_buf, new_size); | |
8696 | mode_line_noprop_buf_end = mode_line_noprop_buf + new_size; | |
8697 | mode_line_noprop_ptr = mode_line_noprop_buf + len; | |
5f5c8ee5 GM |
8698 | } |
8699 | ||
4c0e4b80 | 8700 | *mode_line_noprop_ptr++ = c; |
5f5c8ee5 GM |
8701 | } |
8702 | ||
8703 | ||
4c0e4b80 KS |
8704 | /* Store part of a frame title in mode_line_noprop_buf, beginning at |
8705 | mode_line_noprop_ptr. STR is the string to store. Do not copy | |
d26b89b8 KH |
8706 | characters that yield more columns than PRECISION; PRECISION <= 0 |
8707 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
8708 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
8709 | pad. Called from display_mode_element when it is used to build a | |
8710 | frame title. */ | |
5f5c8ee5 GM |
8711 | |
8712 | static int | |
4c0e4b80 | 8713 | store_mode_line_noprop (str, field_width, precision) |
50f80c2f | 8714 | const unsigned char *str; |
5f5c8ee5 GM |
8715 | int field_width, precision; |
8716 | { | |
8717 | int n = 0; | |
3b552d56 | 8718 | int dummy, nbytes; |
5f5c8ee5 GM |
8719 | |
8720 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 | 8721 | nbytes = strlen (str); |
7a6b6cce | 8722 | n += c_string_width (str, nbytes, precision, &dummy, &nbytes); |
d26b89b8 | 8723 | while (nbytes--) |
4c0e4b80 | 8724 | store_mode_line_noprop_char (*str++); |
5f5c8ee5 GM |
8725 | |
8726 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
8727 | while (field_width > 0 | |
8728 | && n < field_width) | |
8729 | { | |
4c0e4b80 | 8730 | store_mode_line_noprop_char (' '); |
5f5c8ee5 GM |
8731 | ++n; |
8732 | } | |
8733 | ||
8734 | return n; | |
8735 | } | |
8736 | ||
4c0e4b80 KS |
8737 | /*********************************************************************** |
8738 | Frame Titles | |
8739 | ***********************************************************************/ | |
8740 | ||
8143e6ab | 8741 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
8742 | |
8743 | /* Set the title of FRAME, if it has changed. The title format is | |
8744 | Vicon_title_format if FRAME is iconified, otherwise it is | |
8745 | frame_title_format. */ | |
8746 | ||
8747 | static void | |
8748 | x_consider_frame_title (frame) | |
8749 | Lisp_Object frame; | |
8750 | { | |
8751 | struct frame *f = XFRAME (frame); | |
8752 | ||
8753 | if (FRAME_WINDOW_P (f) | |
8754 | || FRAME_MINIBUF_ONLY_P (f) | |
8755 | || f->explicit_name) | |
8756 | { | |
8757 | /* Do we have more than one visible frame on this X display? */ | |
8758 | Lisp_Object tail; | |
8759 | Lisp_Object fmt; | |
d06e3847 KS |
8760 | int title_start; |
8761 | char *title; | |
5f5c8ee5 GM |
8762 | int len; |
8763 | struct it it; | |
4c0e4b80 | 8764 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 8765 | |
9472f927 | 8766 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 8767 | { |
74779f52 JR |
8768 | Lisp_Object other_frame = XCAR (tail); |
8769 | struct frame *tf = XFRAME (other_frame); | |
5f5c8ee5 | 8770 | |
2311178e | 8771 | if (tf != f |
5f5c8ee5 GM |
8772 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
8773 | && !FRAME_MINIBUF_ONLY_P (tf) | |
74779f52 | 8774 | && !EQ (other_frame, tip_frame) |
5f5c8ee5 GM |
8775 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
8776 | break; | |
8777 | } | |
8778 | ||
8779 | /* Set global variable indicating that multiple frames exist. */ | |
8780 | multiple_frames = CONSP (tail); | |
8781 | ||
8782 | /* Switch to the buffer of selected window of the frame. Set up | |
53088ce8 KS |
8783 | mode_line_target so that display_mode_element will output into |
8784 | mode_line_noprop_buf; then display the title. */ | |
4c0e4b80 | 8785 | record_unwind_protect (unwind_format_mode_line, |
f5b8d5f2 | 8786 | format_mode_line_unwind_data (current_buffer, 0)); |
4c0e4b80 | 8787 | |
bb336f8d | 8788 | set_buffer_internal_1 (XBUFFER (XWINDOW (f->selected_window)->buffer)); |
5f5c8ee5 | 8789 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; |
4c0e4b80 KS |
8790 | |
8791 | mode_line_target = MODE_LINE_TITLE; | |
d06e3847 | 8792 | title_start = MODE_LINE_NOPROP_LEN (0); |
5f5c8ee5 GM |
8793 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, |
8794 | NULL, DEFAULT_FACE_ID); | |
c53a1624 | 8795 | display_mode_element (&it, 0, -1, -1, fmt, Qnil, 0); |
d06e3847 KS |
8796 | len = MODE_LINE_NOPROP_LEN (title_start); |
8797 | title = mode_line_noprop_buf + title_start; | |
4c0e4b80 | 8798 | unbind_to (count, Qnil); |
5f5c8ee5 GM |
8799 | |
8800 | /* Set the title only if it's changed. This avoids consing in | |
8801 | the common case where it hasn't. (If it turns out that we've | |
8802 | already wasted too much time by walking through the list with | |
8803 | display_mode_element, then we might need to optimize at a | |
8804 | higher level than this.) */ | |
2311178e | 8805 | if (! STRINGP (f->name) |
2051c264 | 8806 | || SBYTES (f->name) != len |
d06e3847 KS |
8807 | || bcmp (title, SDATA (f->name), len) != 0) |
8808 | x_implicitly_set_name (f, make_string (title, len), Qnil); | |
5f5c8ee5 GM |
8809 | } |
8810 | } | |
8811 | ||
5f5c8ee5 GM |
8812 | #endif /* not HAVE_WINDOW_SYSTEM */ |
8813 | ||
8814 | ||
8815 | ||
8816 | \f | |
8817 | /*********************************************************************** | |
8818 | Menu Bars | |
8819 | ***********************************************************************/ | |
8820 | ||
8821 | ||
8822 | /* Prepare for redisplay by updating menu-bar item lists when | |
8823 | appropriate. This can call eval. */ | |
8824 | ||
8825 | void | |
8826 | prepare_menu_bars () | |
8827 | { | |
8828 | int all_windows; | |
8829 | struct gcpro gcpro1, gcpro2; | |
8830 | struct frame *f; | |
6b5c4794 | 8831 | Lisp_Object tooltip_frame; |
5f5c8ee5 | 8832 | |
86ffe5cd | 8833 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
8834 | tooltip_frame = tip_frame; |
8835 | #else | |
6b5c4794 | 8836 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
8837 | #endif |
8838 | ||
8839 | /* Update all frame titles based on their buffer names, etc. We do | |
8840 | this before the menu bars so that the buffer-menu will show the | |
8841 | up-to-date frame titles. */ | |
8842 | #ifdef HAVE_WINDOW_SYSTEM | |
8843 | if (windows_or_buffers_changed || update_mode_lines) | |
8844 | { | |
8845 | Lisp_Object tail, frame; | |
8846 | ||
8847 | FOR_EACH_FRAME (tail, frame) | |
8848 | { | |
8849 | f = XFRAME (frame); | |
6b5c4794 | 8850 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
8851 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
8852 | x_consider_frame_title (frame); | |
8853 | } | |
8854 | } | |
8855 | #endif /* HAVE_WINDOW_SYSTEM */ | |
8856 | ||
8857 | /* Update the menu bar item lists, if appropriate. This has to be | |
8858 | done before any actual redisplay or generation of display lines. */ | |
2311178e | 8859 | all_windows = (update_mode_lines |
5f5c8ee5 GM |
8860 | || buffer_shared > 1 |
8861 | || windows_or_buffers_changed); | |
8862 | if (all_windows) | |
8863 | { | |
8864 | Lisp_Object tail, frame; | |
331379bf | 8865 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 8866 | |
89f2614d | 8867 | record_unwind_save_match_data (); |
5f5c8ee5 GM |
8868 | |
8869 | FOR_EACH_FRAME (tail, frame) | |
8870 | { | |
8871 | f = XFRAME (frame); | |
8872 | ||
8873 | /* Ignore tooltip frame. */ | |
6b5c4794 | 8874 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 | 8875 | continue; |
2311178e | 8876 | |
5f5c8ee5 GM |
8877 | /* If a window on this frame changed size, report that to |
8878 | the user and clear the size-change flag. */ | |
8879 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
8880 | { | |
8881 | Lisp_Object functions; | |
2311178e | 8882 | |
5f5c8ee5 GM |
8883 | /* Clear flag first in case we get an error below. */ |
8884 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
8885 | functions = Vwindow_size_change_functions; | |
8886 | GCPRO2 (tail, functions); | |
2311178e | 8887 | |
5f5c8ee5 GM |
8888 | while (CONSP (functions)) |
8889 | { | |
8890 | call1 (XCAR (functions), frame); | |
8891 | functions = XCDR (functions); | |
8892 | } | |
8893 | UNGCPRO; | |
8894 | } | |
2311178e | 8895 | |
5f5c8ee5 GM |
8896 | GCPRO1 (tail); |
8897 | update_menu_bar (f, 0); | |
8898 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 8899 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
8900 | #endif |
8901 | UNGCPRO; | |
8902 | } | |
8903 | ||
8904 | unbind_to (count, Qnil); | |
8905 | } | |
8906 | else | |
8907 | { | |
886bd6f2 GM |
8908 | struct frame *sf = SELECTED_FRAME (); |
8909 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 8910 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 8911 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
8912 | #endif |
8913 | } | |
8914 | ||
8915 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
8916 | pending_menu_activation is not defined. */ | |
8917 | #ifdef USE_X_TOOLKIT | |
8918 | pending_menu_activation = 0; | |
8919 | #endif | |
8920 | } | |
8921 | ||
8922 | ||
8923 | /* Update the menu bar item list for frame F. This has to be done | |
8924 | before we start to fill in any display lines, because it can call | |
8925 | eval. | |
8926 | ||
8927 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
8928 | ||
8929 | static void | |
8930 | update_menu_bar (f, save_match_data) | |
8931 | struct frame *f; | |
8932 | int save_match_data; | |
8933 | { | |
8934 | Lisp_Object window; | |
8935 | register struct window *w; | |
8936 | ||
e1477f43 GM |
8937 | /* If called recursively during a menu update, do nothing. This can |
8938 | happen when, for instance, an activate-menubar-hook causes a | |
8939 | redisplay. */ | |
8940 | if (inhibit_menubar_update) | |
8941 | return; | |
8942 | ||
5f5c8ee5 GM |
8943 | window = FRAME_SELECTED_WINDOW (f); |
8944 | w = XWINDOW (window); | |
2311178e | 8945 | |
84f2e615 | 8946 | #if 0 /* The if statement below this if statement used to include the |
a5f08374 RS |
8947 | condition !NILP (w->update_mode_line), rather than using |
8948 | update_mode_lines directly, and this if statement may have | |
8949 | been added to make that condition work. Now the if | |
2311178e | 8950 | statement below matches its comment, this isn't needed. */ |
5f5c8ee5 GM |
8951 | if (update_mode_lines) |
8952 | w->update_mode_line = Qt; | |
a5f08374 | 8953 | #endif |
5f5c8ee5 GM |
8954 | |
8955 | if (FRAME_WINDOW_P (f) | |
8956 | ? | |
488dd4c4 JD |
8957 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
8958 | || defined (USE_GTK) | |
2311178e | 8959 | FRAME_EXTERNAL_MENU_BAR (f) |
5f5c8ee5 GM |
8960 | #else |
8961 | FRAME_MENU_BAR_LINES (f) > 0 | |
8962 | #endif | |
8963 | : FRAME_MENU_BAR_LINES (f) > 0) | |
8964 | { | |
8965 | /* If the user has switched buffers or windows, we need to | |
8966 | recompute to reflect the new bindings. But we'll | |
8967 | recompute when update_mode_lines is set too; that means | |
8968 | that people can use force-mode-line-update to request | |
8969 | that the menu bar be recomputed. The adverse effect on | |
8970 | the rest of the redisplay algorithm is about the same as | |
8971 | windows_or_buffers_changed anyway. */ | |
8972 | if (windows_or_buffers_changed | |
a5f08374 RS |
8973 | /* This used to test w->update_mode_line, but we believe |
8974 | there is no need to recompute the menu in that case. */ | |
8975 | || update_mode_lines | |
5f5c8ee5 GM |
8976 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
8977 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
8978 | != !NILP (w->last_had_star)) | |
8979 | || ((!NILP (Vtransient_mark_mode) | |
8980 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
8981 | != !NILP (w->region_showing))) | |
8982 | { | |
8983 | struct buffer *prev = current_buffer; | |
331379bf | 8984 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 8985 | |
e1477f43 GM |
8986 | specbind (Qinhibit_menubar_update, Qt); |
8987 | ||
5f5c8ee5 GM |
8988 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
8989 | if (save_match_data) | |
89f2614d | 8990 | record_unwind_save_match_data (); |
5f5c8ee5 GM |
8991 | if (NILP (Voverriding_local_map_menu_flag)) |
8992 | { | |
8993 | specbind (Qoverriding_terminal_local_map, Qnil); | |
8994 | specbind (Qoverriding_local_map, Qnil); | |
8995 | } | |
8996 | ||
8997 | /* Run the Lucid hook. */ | |
65048e97 | 8998 | safe_run_hooks (Qactivate_menubar_hook); |
2311178e | 8999 | |
5f5c8ee5 GM |
9000 | /* If it has changed current-menubar from previous value, |
9001 | really recompute the menu-bar from the value. */ | |
9002 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
9003 | call0 (Qrecompute_lucid_menubar); | |
2311178e | 9004 | |
5f5c8ee5 GM |
9005 | safe_run_hooks (Qmenu_bar_update_hook); |
9006 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
2311178e | 9007 | |
5f5c8ee5 | 9008 | /* Redisplay the menu bar in case we changed it. */ |
488dd4c4 JD |
9009 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
9010 | || defined (USE_GTK) | |
1a578e9b | 9011 | if (FRAME_WINDOW_P (f) |
e0f712ba | 9012 | #if defined (MAC_OS) |
1a578e9b AC |
9013 | /* All frames on Mac OS share the same menubar. So only the |
9014 | selected frame should be allowed to set it. */ | |
9015 | && f == SELECTED_FRAME () | |
9016 | #endif | |
9017 | ) | |
5f5c8ee5 GM |
9018 | set_frame_menubar (f, 0, 0); |
9019 | else | |
9020 | /* On a terminal screen, the menu bar is an ordinary screen | |
9021 | line, and this makes it get updated. */ | |
9022 | w->update_mode_line = Qt; | |
488dd4c4 | 9023 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
9024 | /* In the non-toolkit version, the menu bar is an ordinary screen |
9025 | line, and this makes it get updated. */ | |
9026 | w->update_mode_line = Qt; | |
488dd4c4 | 9027 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
9028 | |
9029 | unbind_to (count, Qnil); | |
9030 | set_buffer_internal_1 (prev); | |
9031 | } | |
9032 | } | |
9033 | } | |
9034 | ||
9035 | ||
9036 | \f | |
fa3c6b4d KS |
9037 | /*********************************************************************** |
9038 | Output Cursor | |
9039 | ***********************************************************************/ | |
9040 | ||
1dabd0cf KS |
9041 | #ifdef HAVE_WINDOW_SYSTEM |
9042 | ||
fa3c6b4d KS |
9043 | /* EXPORT: |
9044 | Nominal cursor position -- where to draw output. | |
9045 | HPOS and VPOS are window relative glyph matrix coordinates. | |
9046 | X and Y are window relative pixel coordinates. */ | |
9047 | ||
9048 | struct cursor_pos output_cursor; | |
9049 | ||
9050 | ||
9051 | /* EXPORT: | |
9052 | Set the global variable output_cursor to CURSOR. All cursor | |
9053 | positions are relative to updated_window. */ | |
9054 | ||
9055 | void | |
9056 | set_output_cursor (cursor) | |
9057 | struct cursor_pos *cursor; | |
9058 | { | |
9059 | output_cursor.hpos = cursor->hpos; | |
9060 | output_cursor.vpos = cursor->vpos; | |
9061 | output_cursor.x = cursor->x; | |
9062 | output_cursor.y = cursor->y; | |
9063 | } | |
9064 | ||
9065 | ||
9066 | /* EXPORT for RIF: | |
9067 | Set a nominal cursor position. | |
9068 | ||
9069 | HPOS and VPOS are column/row positions in a window glyph matrix. X | |
9070 | and Y are window text area relative pixel positions. | |
9071 | ||
9072 | If this is done during an update, updated_window will contain the | |
9073 | window that is being updated and the position is the future output | |
9074 | cursor position for that window. If updated_window is null, use | |
9075 | selected_window and display the cursor at the given position. */ | |
9076 | ||
9077 | void | |
9078 | x_cursor_to (vpos, hpos, y, x) | |
9079 | int vpos, hpos, y, x; | |
9080 | { | |
9081 | struct window *w; | |
9082 | ||
9083 | /* If updated_window is not set, work on selected_window. */ | |
9084 | if (updated_window) | |
9085 | w = updated_window; | |
9086 | else | |
9087 | w = XWINDOW (selected_window); | |
9088 | ||
9089 | /* Set the output cursor. */ | |
9090 | output_cursor.hpos = hpos; | |
9091 | output_cursor.vpos = vpos; | |
9092 | output_cursor.x = x; | |
9093 | output_cursor.y = y; | |
9094 | ||
9095 | /* If not called as part of an update, really display the cursor. | |
9096 | This will also set the cursor position of W. */ | |
9097 | if (updated_window == NULL) | |
9098 | { | |
9099 | BLOCK_INPUT; | |
9100 | display_and_set_cursor (w, 1, hpos, vpos, x, y); | |
9101 | if (rif->flush_display_optional) | |
9102 | rif->flush_display_optional (SELECTED_FRAME ()); | |
9103 | UNBLOCK_INPUT; | |
9104 | } | |
9105 | } | |
9106 | ||
1dabd0cf | 9107 | #endif /* HAVE_WINDOW_SYSTEM */ |
fa3c6b4d KS |
9108 | |
9109 | \f | |
5f5c8ee5 | 9110 | /*********************************************************************** |
e037b9ec | 9111 | Tool-bars |
5f5c8ee5 GM |
9112 | ***********************************************************************/ |
9113 | ||
9114 | #ifdef HAVE_WINDOW_SYSTEM | |
9115 | ||
fa3c6b4d KS |
9116 | /* Where the mouse was last time we reported a mouse event. */ |
9117 | ||
9118 | FRAME_PTR last_mouse_frame; | |
9119 | ||
9120 | /* Tool-bar item index of the item on which a mouse button was pressed | |
9121 | or -1. */ | |
9122 | ||
9123 | int last_tool_bar_item; | |
9124 | ||
9125 | ||
e037b9ec | 9126 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
9127 | before we start to fill in any display lines. Called from |
9128 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
9129 | and restore it here. */ | |
9130 | ||
9131 | static void | |
e037b9ec | 9132 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
9133 | struct frame *f; |
9134 | int save_match_data; | |
9135 | { | |
488dd4c4 | 9136 | #ifdef USE_GTK |
810f2256 | 9137 | int do_update = FRAME_EXTERNAL_TOOL_BAR (f); |
488dd4c4 JD |
9138 | #else |
9139 | int do_update = WINDOWP (f->tool_bar_window) | |
da8b7f4f | 9140 | && WINDOW_TOTAL_LINES (XWINDOW (f->tool_bar_window)) > 0; |
488dd4c4 JD |
9141 | #endif |
9142 | ||
9143 | if (do_update) | |
5f5c8ee5 GM |
9144 | { |
9145 | Lisp_Object window; | |
9146 | struct window *w; | |
9147 | ||
9148 | window = FRAME_SELECTED_WINDOW (f); | |
9149 | w = XWINDOW (window); | |
2311178e | 9150 | |
5f5c8ee5 GM |
9151 | /* If the user has switched buffers or windows, we need to |
9152 | recompute to reflect the new bindings. But we'll | |
9153 | recompute when update_mode_lines is set too; that means | |
9154 | that people can use force-mode-line-update to request | |
9155 | that the menu bar be recomputed. The adverse effect on | |
9156 | the rest of the redisplay algorithm is about the same as | |
9157 | windows_or_buffers_changed anyway. */ | |
9158 | if (windows_or_buffers_changed | |
9159 | || !NILP (w->update_mode_line) | |
84f2e615 | 9160 | || update_mode_lines |
5f5c8ee5 GM |
9161 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
9162 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
9163 | != !NILP (w->last_had_star)) | |
9164 | || ((!NILP (Vtransient_mark_mode) | |
9165 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
9166 | != !NILP (w->region_showing))) | |
9167 | { | |
9168 | struct buffer *prev = current_buffer; | |
331379bf | 9169 | int count = SPECPDL_INDEX (); |
12e6566a JD |
9170 | Lisp_Object new_tool_bar; |
9171 | int new_n_tool_bar; | |
84f2e615 | 9172 | struct gcpro gcpro1; |
a2889657 | 9173 | |
5f5c8ee5 GM |
9174 | /* Set current_buffer to the buffer of the selected |
9175 | window of the frame, so that we get the right local | |
9176 | keymaps. */ | |
9177 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 9178 | |
5f5c8ee5 GM |
9179 | /* Save match data, if we must. */ |
9180 | if (save_match_data) | |
89f2614d | 9181 | record_unwind_save_match_data (); |
5f5c8ee5 GM |
9182 | |
9183 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
9184 | if (NILP (Voverriding_local_map_menu_flag)) | |
9185 | { | |
9186 | specbind (Qoverriding_terminal_local_map, Qnil); | |
9187 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 9188 | } |
1f40cad2 | 9189 | |
12e6566a | 9190 | GCPRO1 (new_tool_bar); |
84f2e615 | 9191 | |
e037b9ec | 9192 | /* Build desired tool-bar items from keymaps. */ |
12e6566a JD |
9193 | new_tool_bar = tool_bar_items (Fcopy_sequence (f->tool_bar_items), |
9194 | &new_n_tool_bar); | |
2311178e | 9195 | |
84f2e615 | 9196 | /* Redisplay the tool-bar if we changed it. */ |
12e6566a JD |
9197 | if (NILP (Fequal (new_tool_bar, f->tool_bar_items))) |
9198 | { | |
9199 | /* Redisplay that happens asynchronously due to an expose event | |
9200 | may access f->tool_bar_items. Make sure we update both | |
9201 | variables within BLOCK_INPUT so no such event interrupts. */ | |
9202 | BLOCK_INPUT; | |
9203 | f->tool_bar_items = new_tool_bar; | |
9204 | f->n_tool_bar_items = new_n_tool_bar; | |
9205 | w->update_mode_line = Qt; | |
9206 | UNBLOCK_INPUT; | |
9207 | } | |
be21b925 | 9208 | |
1e802fb5 | 9209 | UNGCPRO; |
5f5c8ee5 GM |
9210 | |
9211 | unbind_to (count, Qnil); | |
9212 | set_buffer_internal_1 (prev); | |
81d478f3 | 9213 | } |
a2889657 JB |
9214 | } |
9215 | } | |
9216 | ||
6c4429a5 | 9217 | |
e037b9ec | 9218 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 9219 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
9220 | been set up previously by calling prepare_menu_bars. */ |
9221 | ||
a2889657 | 9222 | static void |
e037b9ec | 9223 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 9224 | struct frame *f; |
a2889657 | 9225 | { |
a23887b9 | 9226 | int i, size, size_needed; |
5f5c8ee5 GM |
9227 | struct gcpro gcpro1, gcpro2, gcpro3; |
9228 | Lisp_Object image, plist, props; | |
a2889657 | 9229 | |
5f5c8ee5 GM |
9230 | image = plist = props = Qnil; |
9231 | GCPRO3 (image, plist, props); | |
a2889657 | 9232 | |
e037b9ec | 9233 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 | 9234 | Otherwise, make a new string. */ |
2311178e | 9235 | |
5f5c8ee5 | 9236 | /* The size of the string we might be able to reuse. */ |
e037b9ec | 9237 | size = (STRINGP (f->desired_tool_bar_string) |
2051c264 | 9238 | ? SCHARS (f->desired_tool_bar_string) |
5f5c8ee5 GM |
9239 | : 0); |
9240 | ||
b94c0d9c | 9241 | /* We need one space in the string for each image. */ |
a23887b9 | 9242 | size_needed = f->n_tool_bar_items; |
2311178e | 9243 | |
b94c0d9c | 9244 | /* Reuse f->desired_tool_bar_string, if possible. */ |
cb2ddc53 | 9245 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
9246 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
9247 | make_number (' ')); | |
5f5c8ee5 GM |
9248 | else |
9249 | { | |
9250 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
9251 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 9252 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 9253 | } |
a2889657 | 9254 | |
5f5c8ee5 | 9255 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
9256 | put a `menu_item' property on tool-bar items with a value that |
9257 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 9258 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 9259 | { |
7464726e | 9260 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 9261 | |
e037b9ec GM |
9262 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
9263 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 9264 | int hmargin, vmargin, relief, idx, end; |
493fdc3c | 9265 | extern Lisp_Object QCrelief, QCmargin, QCconversion; |
5f5c8ee5 GM |
9266 | |
9267 | /* If image is a vector, choose the image according to the | |
9268 | button state. */ | |
e037b9ec | 9269 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
9270 | if (VECTORP (image)) |
9271 | { | |
5f5c8ee5 GM |
9272 | if (enabled_p) |
9273 | idx = (selected_p | |
e037b9ec GM |
9274 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
9275 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
9276 | else |
9277 | idx = (selected_p | |
e037b9ec GM |
9278 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
9279 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
2311178e | 9280 | |
37e4e482 GM |
9281 | xassert (ASIZE (image) >= idx); |
9282 | image = AREF (image, idx); | |
5f5c8ee5 | 9283 | } |
37e4e482 GM |
9284 | else |
9285 | idx = -1; | |
5f5c8ee5 GM |
9286 | |
9287 | /* Ignore invalid image specifications. */ | |
9288 | if (!valid_image_p (image)) | |
9289 | continue; | |
9290 | ||
e037b9ec | 9291 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
9292 | plist = Fcopy_sequence (XCDR (image)); |
9293 | ||
9294 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 9295 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
9296 | ? tool_bar_button_relief |
9297 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
9298 | hmargin = vmargin = relief; |
9299 | ||
9300 | if (INTEGERP (Vtool_bar_button_margin) | |
9301 | && XINT (Vtool_bar_button_margin) > 0) | |
9302 | { | |
9303 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
9304 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
9305 | } | |
9306 | else if (CONSP (Vtool_bar_button_margin)) | |
9307 | { | |
9308 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
9309 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
9310 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
2311178e | 9311 | |
35a41507 GM |
9312 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) |
9313 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
9314 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
9315 | } | |
2311178e | 9316 | |
e037b9ec | 9317 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
9318 | { |
9319 | /* Add a `:relief' property to the image spec if the item is | |
9320 | selected. */ | |
9321 | if (selected_p) | |
9322 | { | |
9323 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
9324 | hmargin -= relief; |
9325 | vmargin -= relief; | |
5f5c8ee5 GM |
9326 | } |
9327 | } | |
9328 | else | |
9329 | { | |
9330 | /* If image is selected, display it pressed, i.e. with a | |
9331 | negative relief. If it's not selected, display it with a | |
9332 | raised relief. */ | |
9333 | plist = Fplist_put (plist, QCrelief, | |
9334 | (selected_p | |
9335 | ? make_number (-relief) | |
9336 | : make_number (relief))); | |
35a41507 GM |
9337 | hmargin -= relief; |
9338 | vmargin -= relief; | |
5f5c8ee5 GM |
9339 | } |
9340 | ||
9341 | /* Put a margin around the image. */ | |
35a41507 GM |
9342 | if (hmargin || vmargin) |
9343 | { | |
9344 | if (hmargin == vmargin) | |
9345 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
9346 | else | |
9347 | plist = Fplist_put (plist, QCmargin, | |
9348 | Fcons (make_number (hmargin), | |
9349 | make_number (vmargin))); | |
9350 | } | |
2311178e | 9351 | |
37e4e482 GM |
9352 | /* If button is not enabled, and we don't have special images |
9353 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 9354 | applying an appropriate algorithm to it. */ |
37e4e482 | 9355 | if (!enabled_p && idx < 0) |
ecd01a0e | 9356 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
2311178e | 9357 | |
5f5c8ee5 GM |
9358 | /* Put a `display' text property on the string for the image to |
9359 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 9360 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
9361 | vector. */ |
9362 | image = Fcons (Qimage, plist); | |
9363 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
9364 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
9365 | ||
9366 | /* Let the last image hide all remaining spaces in the tool bar | |
9367 | string. The string can be longer than needed when we reuse a | |
9368 | previous string. */ | |
9369 | if (i + 1 == f->n_tool_bar_items) | |
2051c264 | 9370 | end = SCHARS (f->desired_tool_bar_string); |
a23887b9 GM |
9371 | else |
9372 | end = i + 1; | |
9373 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 9374 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 9375 | #undef PROP |
a2889657 JB |
9376 | } |
9377 | ||
5f5c8ee5 GM |
9378 | UNGCPRO; |
9379 | } | |
9380 | ||
9381 | ||
e037b9ec | 9382 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
9383 | |
9384 | static void | |
e037b9ec | 9385 | display_tool_bar_line (it) |
5f5c8ee5 GM |
9386 | struct it *it; |
9387 | { | |
9388 | struct glyph_row *row = it->glyph_row; | |
9389 | int max_x = it->last_visible_x; | |
9390 | struct glyph *last; | |
2311178e | 9391 | |
5f5c8ee5 GM |
9392 | prepare_desired_row (row); |
9393 | row->y = it->current_y; | |
90aa2856 GM |
9394 | |
9395 | /* Note that this isn't made use of if the face hasn't a box, | |
9396 | so there's no need to check the face here. */ | |
9397 | it->start_of_box_run_p = 1; | |
2311178e | 9398 | |
5f5c8ee5 | 9399 | while (it->current_x < max_x) |
a2889657 | 9400 | { |
5f5c8ee5 | 9401 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 9402 | |
5f5c8ee5 GM |
9403 | /* Get the next display element. */ |
9404 | if (!get_next_display_element (it)) | |
9405 | break; | |
73af359d | 9406 | |
5f5c8ee5 GM |
9407 | /* Produce glyphs. */ |
9408 | x_before = it->current_x; | |
9409 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
9410 | PRODUCE_GLYPHS (it); | |
daa37602 | 9411 | |
5f5c8ee5 GM |
9412 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
9413 | i = 0; | |
9414 | x = x_before; | |
9415 | while (i < nglyphs) | |
9416 | { | |
9417 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
2311178e | 9418 | |
5f5c8ee5 GM |
9419 | if (x + glyph->pixel_width > max_x) |
9420 | { | |
9421 | /* Glyph doesn't fit on line. */ | |
9422 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
9423 | it->current_x = x; | |
9424 | goto out; | |
9425 | } | |
daa37602 | 9426 | |
5f5c8ee5 GM |
9427 | ++it->hpos; |
9428 | x += glyph->pixel_width; | |
9429 | ++i; | |
9430 | } | |
9431 | ||
9432 | /* Stop at line ends. */ | |
9433 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
9434 | break; | |
9435 | ||
cafafe0b | 9436 | set_iterator_to_next (it, 1); |
a2889657 | 9437 | } |
a2889657 | 9438 | |
5f5c8ee5 | 9439 | out:; |
a2889657 | 9440 | |
5f5c8ee5 GM |
9441 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
9442 | extend_face_to_end_of_line (it); | |
9443 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
9444 | last->right_box_line_p = 1; | |
90aa2856 GM |
9445 | if (last == row->glyphs[TEXT_AREA]) |
9446 | last->left_box_line_p = 1; | |
5f5c8ee5 | 9447 | compute_line_metrics (it); |
2311178e | 9448 | |
e037b9ec | 9449 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
9450 | if (!row->displays_text_p) |
9451 | { | |
312246d1 GM |
9452 | row->height = row->phys_height = it->last_visible_y - row->y; |
9453 | row->ascent = row->phys_ascent = 0; | |
546f98b8 | 9454 | row->extra_line_spacing = 0; |
5f5c8ee5 | 9455 | } |
2311178e | 9456 | |
5f5c8ee5 GM |
9457 | row->full_width_p = 1; |
9458 | row->continued_p = 0; | |
9459 | row->truncated_on_left_p = 0; | |
9460 | row->truncated_on_right_p = 0; | |
9461 | ||
9462 | it->current_x = it->hpos = 0; | |
9463 | it->current_y += row->height; | |
9464 | ++it->vpos; | |
9465 | ++it->glyph_row; | |
a2889657 | 9466 | } |
96a410bc | 9467 | |
5f5c8ee5 | 9468 | |
e037b9ec | 9469 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 9470 | items of frame F visible. */ |
96a410bc | 9471 | |
d39b6696 | 9472 | static int |
e037b9ec | 9473 | tool_bar_lines_needed (f) |
5f5c8ee5 | 9474 | struct frame *f; |
d39b6696 | 9475 | { |
e037b9ec | 9476 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 9477 | struct it it; |
2311178e | 9478 | |
e037b9ec GM |
9479 | /* Initialize an iterator for iteration over |
9480 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
9481 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 | 9482 | it.first_visible_x = 0; |
da8b7f4f | 9483 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
e037b9ec | 9484 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
9485 | |
9486 | while (!ITERATOR_AT_END_P (&it)) | |
9487 | { | |
9488 | it.glyph_row = w->desired_matrix->rows; | |
9489 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 9490 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
9491 | } |
9492 | ||
da8b7f4f | 9493 | return (it.current_y + FRAME_LINE_HEIGHT (f) - 1) / FRAME_LINE_HEIGHT (f); |
d39b6696 | 9494 | } |
96a410bc | 9495 | |
5f5c8ee5 | 9496 | |
57c28064 GM |
9497 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
9498 | 0, 1, 0, | |
7ee72033 MB |
9499 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
9500 | (frame) | |
57c28064 GM |
9501 | Lisp_Object frame; |
9502 | { | |
9503 | struct frame *f; | |
9504 | struct window *w; | |
9505 | int nlines = 0; | |
9506 | ||
9507 | if (NILP (frame)) | |
9508 | frame = selected_frame; | |
9509 | else | |
b7826503 | 9510 | CHECK_FRAME (frame); |
57c28064 | 9511 | f = XFRAME (frame); |
2311178e | 9512 | |
57c28064 GM |
9513 | if (WINDOWP (f->tool_bar_window) |
9514 | || (w = XWINDOW (f->tool_bar_window), | |
da8b7f4f | 9515 | WINDOW_TOTAL_LINES (w) > 0)) |
57c28064 GM |
9516 | { |
9517 | update_tool_bar (f, 1); | |
9518 | if (f->n_tool_bar_items) | |
9519 | { | |
9520 | build_desired_tool_bar_string (f); | |
9521 | nlines = tool_bar_lines_needed (f); | |
9522 | } | |
9523 | } | |
9524 | ||
9525 | return make_number (nlines); | |
9526 | } | |
9527 | ||
9528 | ||
e037b9ec | 9529 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
9530 | height should be changed. */ |
9531 | ||
9532 | static int | |
e037b9ec | 9533 | redisplay_tool_bar (f) |
5f5c8ee5 | 9534 | struct frame *f; |
96a410bc | 9535 | { |
5f5c8ee5 GM |
9536 | struct window *w; |
9537 | struct it it; | |
9538 | struct glyph_row *row; | |
9539 | int change_height_p = 0; | |
177c0ea7 | 9540 | |
488dd4c4 | 9541 | #ifdef USE_GTK |
810f2256 | 9542 | if (FRAME_EXTERNAL_TOOL_BAR (f)) |
488dd4c4 JD |
9543 | update_frame_tool_bar (f); |
9544 | return 0; | |
9545 | #endif | |
2311178e | 9546 | |
e037b9ec GM |
9547 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
9548 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 9549 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
9550 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
9551 | if (!WINDOWP (f->tool_bar_window) | |
9552 | || (w = XWINDOW (f->tool_bar_window), | |
da8b7f4f | 9553 | WINDOW_TOTAL_LINES (w) == 0)) |
5f5c8ee5 | 9554 | return 0; |
96a410bc | 9555 | |
e037b9ec GM |
9556 | /* Set up an iterator for the tool-bar window. */ |
9557 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 | 9558 | it.first_visible_x = 0; |
da8b7f4f | 9559 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
5f5c8ee5 | 9560 | row = it.glyph_row; |
3450d04c | 9561 | |
e037b9ec GM |
9562 | /* Build a string that represents the contents of the tool-bar. */ |
9563 | build_desired_tool_bar_string (f); | |
9564 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 9565 | |
e037b9ec | 9566 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 9567 | while (it.current_y < it.last_visible_y) |
e037b9ec | 9568 | display_tool_bar_line (&it); |
3450d04c | 9569 | |
e037b9ec | 9570 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
9571 | window, so don't do it. */ |
9572 | w->desired_matrix->no_scrolling_p = 1; | |
9573 | w->must_be_updated_p = 1; | |
3450d04c | 9574 | |
e037b9ec | 9575 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
9576 | { |
9577 | int nlines; | |
6e33e6f0 GM |
9578 | |
9579 | /* If we couldn't display everything, change the tool-bar's | |
9580 | height. */ | |
9581 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
9582 | change_height_p = 1; | |
2311178e | 9583 | |
5f5c8ee5 GM |
9584 | /* If there are blank lines at the end, except for a partially |
9585 | visible blank line at the end that is smaller than | |
da8b7f4f | 9586 | FRAME_LINE_HEIGHT, change the tool-bar's height. */ |
5f5c8ee5 GM |
9587 | row = it.glyph_row - 1; |
9588 | if (!row->displays_text_p | |
da8b7f4f | 9589 | && row->height >= FRAME_LINE_HEIGHT (f)) |
5f5c8ee5 GM |
9590 | change_height_p = 1; |
9591 | ||
e037b9ec GM |
9592 | /* If row displays tool-bar items, but is partially visible, |
9593 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
9594 | if (row->displays_text_p |
9595 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
9596 | change_height_p = 1; | |
9597 | ||
e037b9ec | 9598 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
9599 | frame parameter. */ |
9600 | if (change_height_p | |
e037b9ec | 9601 | && (nlines = tool_bar_lines_needed (f), |
da8b7f4f | 9602 | nlines != WINDOW_TOTAL_LINES (w))) |
5f5c8ee5 | 9603 | { |
e037b9ec | 9604 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 9605 | Lisp_Object frame; |
da8b7f4f | 9606 | int old_height = WINDOW_TOTAL_LINES (w); |
2311178e | 9607 | |
5f5c8ee5 GM |
9608 | XSETFRAME (frame, f); |
9609 | clear_glyph_matrix (w->desired_matrix); | |
9610 | Fmodify_frame_parameters (frame, | |
e037b9ec | 9611 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
9612 | make_number (nlines)), |
9613 | Qnil)); | |
da8b7f4f | 9614 | if (WINDOW_TOTAL_LINES (w) != old_height) |
e85ee976 | 9615 | fonts_changed_p = 1; |
5f5c8ee5 GM |
9616 | } |
9617 | } | |
3450d04c | 9618 | |
5f5c8ee5 | 9619 | return change_height_p; |
96a410bc | 9620 | } |
90adcf20 | 9621 | |
5f5c8ee5 | 9622 | |
e037b9ec GM |
9623 | /* Get information about the tool-bar item which is displayed in GLYPH |
9624 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 9625 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 9626 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 | 9627 | |
fa3c6b4d | 9628 | static int |
e037b9ec | 9629 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
9630 | struct frame *f; |
9631 | struct glyph *glyph; | |
9632 | int *prop_idx; | |
90adcf20 | 9633 | { |
5f5c8ee5 GM |
9634 | Lisp_Object prop; |
9635 | int success_p; | |
be676094 GM |
9636 | int charpos; |
9637 | ||
9638 | /* This function can be called asynchronously, which means we must | |
9639 | exclude any possibility that Fget_text_property signals an | |
9640 | error. */ | |
2051c264 | 9641 | charpos = min (SCHARS (f->current_tool_bar_string), glyph->charpos); |
be676094 | 9642 | charpos = max (0, charpos); |
2311178e | 9643 | |
5f5c8ee5 GM |
9644 | /* Get the text property `menu-item' at pos. The value of that |
9645 | property is the start index of this item's properties in | |
7464726e | 9646 | F->tool_bar_items. */ |
be676094 | 9647 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 9648 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
9649 | if (INTEGERP (prop)) |
9650 | { | |
9651 | *prop_idx = XINT (prop); | |
9652 | success_p = 1; | |
9653 | } | |
9654 | else | |
9655 | success_p = 0; | |
90adcf20 | 9656 | |
5f5c8ee5 GM |
9657 | return success_p; |
9658 | } | |
2311178e | 9659 | |
fa3c6b4d KS |
9660 | \f |
9661 | /* Get information about the tool-bar item at position X/Y on frame F. | |
9662 | Return in *GLYPH a pointer to the glyph of the tool-bar item in | |
9663 | the current matrix of the tool-bar window of F, or NULL if not | |
9664 | on a tool-bar item. Return in *PROP_IDX the index of the tool-bar | |
9665 | item in F->tool_bar_items. Value is | |
9666 | ||
9667 | -1 if X/Y is not on a tool-bar item | |
9668 | 0 if X/Y is on the same item that was highlighted before. | |
9669 | 1 otherwise. */ | |
9670 | ||
9671 | static int | |
9672 | get_tool_bar_item (f, x, y, glyph, hpos, vpos, prop_idx) | |
9673 | struct frame *f; | |
9674 | int x, y; | |
9675 | struct glyph **glyph; | |
9676 | int *hpos, *vpos, *prop_idx; | |
9677 | { | |
9678 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
9679 | struct window *w = XWINDOW (f->tool_bar_window); | |
9680 | int area; | |
9681 | ||
9682 | /* Find the glyph under X/Y. */ | |
493fdc3c | 9683 | *glyph = x_y_to_hpos_vpos (w, x, y, hpos, vpos, 0, 0, &area); |
fa3c6b4d KS |
9684 | if (*glyph == NULL) |
9685 | return -1; | |
9686 | ||
9687 | /* Get the start of this tool-bar item's properties in | |
9688 | f->tool_bar_items. */ | |
9689 | if (!tool_bar_item_info (f, *glyph, prop_idx)) | |
9690 | return -1; | |
9691 | ||
9692 | /* Is mouse on the highlighted item? */ | |
9693 | if (EQ (f->tool_bar_window, dpyinfo->mouse_face_window) | |
9694 | && *vpos >= dpyinfo->mouse_face_beg_row | |
9695 | && *vpos <= dpyinfo->mouse_face_end_row | |
9696 | && (*vpos > dpyinfo->mouse_face_beg_row | |
9697 | || *hpos >= dpyinfo->mouse_face_beg_col) | |
9698 | && (*vpos < dpyinfo->mouse_face_end_row | |
9699 | || *hpos < dpyinfo->mouse_face_end_col | |
9700 | || dpyinfo->mouse_face_past_end)) | |
9701 | return 0; | |
9702 | ||
9703 | return 1; | |
9704 | } | |
9705 | ||
9706 | ||
9707 | /* EXPORT: | |
9708 | Handle mouse button event on the tool-bar of frame F, at | |
9709 | frame-relative coordinates X/Y. DOWN_P is 1 for a button press, | |
9710 | 0 for button release. MODIFIERS is event modifiers for button | |
9711 | release. */ | |
9712 | ||
9713 | void | |
9714 | handle_tool_bar_click (f, x, y, down_p, modifiers) | |
9715 | struct frame *f; | |
9716 | int x, y, down_p; | |
9717 | unsigned int modifiers; | |
9718 | { | |
9719 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
9720 | struct window *w = XWINDOW (f->tool_bar_window); | |
9721 | int hpos, vpos, prop_idx; | |
9722 | struct glyph *glyph; | |
9723 | Lisp_Object enabled_p; | |
9724 | ||
9725 | /* If not on the highlighted tool-bar item, return. */ | |
9726 | frame_to_window_pixel_xy (w, &x, &y); | |
9727 | if (get_tool_bar_item (f, x, y, &glyph, &hpos, &vpos, &prop_idx) != 0) | |
9728 | return; | |
9729 | ||
9730 | /* If item is disabled, do nothing. */ | |
9731 | enabled_p = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_ENABLED_P); | |
9732 | if (NILP (enabled_p)) | |
9733 | return; | |
9734 | ||
9735 | if (down_p) | |
9736 | { | |
9737 | /* Show item in pressed state. */ | |
9738 | show_mouse_face (dpyinfo, DRAW_IMAGE_SUNKEN); | |
9739 | dpyinfo->mouse_face_image_state = DRAW_IMAGE_SUNKEN; | |
9740 | last_tool_bar_item = prop_idx; | |
9741 | } | |
9742 | else | |
9743 | { | |
9744 | Lisp_Object key, frame; | |
9745 | struct input_event event; | |
d86705ec | 9746 | EVENT_INIT (event); |
fa3c6b4d KS |
9747 | |
9748 | /* Show item in released state. */ | |
9749 | show_mouse_face (dpyinfo, DRAW_IMAGE_RAISED); | |
9750 | dpyinfo->mouse_face_image_state = DRAW_IMAGE_RAISED; | |
9751 | ||
9752 | key = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_KEY); | |
9753 | ||
9754 | XSETFRAME (frame, f); | |
9755 | event.kind = TOOL_BAR_EVENT; | |
9756 | event.frame_or_window = frame; | |
9757 | event.arg = frame; | |
9758 | kbd_buffer_store_event (&event); | |
9759 | ||
9760 | event.kind = TOOL_BAR_EVENT; | |
9761 | event.frame_or_window = frame; | |
9762 | event.arg = key; | |
9763 | event.modifiers = modifiers; | |
9764 | kbd_buffer_store_event (&event); | |
9765 | last_tool_bar_item = -1; | |
9766 | } | |
9767 | } | |
9768 | ||
9769 | ||
9770 | /* Possibly highlight a tool-bar item on frame F when mouse moves to | |
9771 | tool-bar window-relative coordinates X/Y. Called from | |
9772 | note_mouse_highlight. */ | |
9773 | ||
9774 | static void | |
9775 | note_tool_bar_highlight (f, x, y) | |
9776 | struct frame *f; | |
9777 | int x, y; | |
9778 | { | |
9779 | Lisp_Object window = f->tool_bar_window; | |
9780 | struct window *w = XWINDOW (window); | |
9781 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
9782 | int hpos, vpos; | |
9783 | struct glyph *glyph; | |
9784 | struct glyph_row *row; | |
9785 | int i; | |
9786 | Lisp_Object enabled_p; | |
9787 | int prop_idx; | |
9788 | enum draw_glyphs_face draw = DRAW_IMAGE_RAISED; | |
9789 | int mouse_down_p, rc; | |
9790 | ||
9791 | /* Function note_mouse_highlight is called with negative x(y | |
9792 | values when mouse moves outside of the frame. */ | |
9793 | if (x <= 0 || y <= 0) | |
9794 | { | |
9795 | clear_mouse_face (dpyinfo); | |
9796 | return; | |
9797 | } | |
9798 | ||
9799 | rc = get_tool_bar_item (f, x, y, &glyph, &hpos, &vpos, &prop_idx); | |
9800 | if (rc < 0) | |
9801 | { | |
9802 | /* Not on tool-bar item. */ | |
9803 | clear_mouse_face (dpyinfo); | |
9804 | return; | |
9805 | } | |
9806 | else if (rc == 0) | |
9807 | /* On same tool-bar item as before. */ | |
9808 | goto set_help_echo; | |
9809 | ||
9810 | clear_mouse_face (dpyinfo); | |
9811 | ||
9812 | /* Mouse is down, but on different tool-bar item? */ | |
9813 | mouse_down_p = (dpyinfo->grabbed | |
9814 | && f == last_mouse_frame | |
9815 | && FRAME_LIVE_P (f)); | |
9816 | if (mouse_down_p | |
9817 | && last_tool_bar_item != prop_idx) | |
9818 | return; | |
9819 | ||
9820 | dpyinfo->mouse_face_image_state = DRAW_NORMAL_TEXT; | |
9821 | draw = mouse_down_p ? DRAW_IMAGE_SUNKEN : DRAW_IMAGE_RAISED; | |
9822 | ||
9823 | /* If tool-bar item is not enabled, don't highlight it. */ | |
9824 | enabled_p = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_ENABLED_P); | |
9825 | if (!NILP (enabled_p)) | |
9826 | { | |
9827 | /* Compute the x-position of the glyph. In front and past the | |
da8b7f4f | 9828 | image is a space. We include this in the highlighted area. */ |
fa3c6b4d KS |
9829 | row = MATRIX_ROW (w->current_matrix, vpos); |
9830 | for (i = x = 0; i < hpos; ++i) | |
9831 | x += row->glyphs[TEXT_AREA][i].pixel_width; | |
9832 | ||
9833 | /* Record this as the current active region. */ | |
9834 | dpyinfo->mouse_face_beg_col = hpos; | |
9835 | dpyinfo->mouse_face_beg_row = vpos; | |
9836 | dpyinfo->mouse_face_beg_x = x; | |
9837 | dpyinfo->mouse_face_beg_y = row->y; | |
9838 | dpyinfo->mouse_face_past_end = 0; | |
9839 | ||
9840 | dpyinfo->mouse_face_end_col = hpos + 1; | |
9841 | dpyinfo->mouse_face_end_row = vpos; | |
9842 | dpyinfo->mouse_face_end_x = x + glyph->pixel_width; | |
9843 | dpyinfo->mouse_face_end_y = row->y; | |
9844 | dpyinfo->mouse_face_window = window; | |
9845 | dpyinfo->mouse_face_face_id = TOOL_BAR_FACE_ID; | |
9846 | ||
9847 | /* Display it as active. */ | |
9848 | show_mouse_face (dpyinfo, draw); | |
9849 | dpyinfo->mouse_face_image_state = draw; | |
9850 | } | |
9851 | ||
9852 | set_help_echo: | |
9853 | ||
9854 | /* Set help_echo_string to a help string to display for this tool-bar item. | |
9855 | XTread_socket does the rest. */ | |
9856 | help_echo_object = help_echo_window = Qnil; | |
9857 | help_echo_pos = -1; | |
9858 | help_echo_string = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_HELP); | |
9859 | if (NILP (help_echo_string)) | |
9860 | help_echo_string = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_CAPTION); | |
9861 | } | |
9862 | ||
5f5c8ee5 | 9863 | #endif /* HAVE_WINDOW_SYSTEM */ |
ffbbc941 KS |
9864 | |
9865 | ||
9866 | \f | |
5f5c8ee5 GM |
9867 | /************************************************************************ |
9868 | Horizontal scrolling | |
9869 | ************************************************************************/ | |
feb0c42f | 9870 | |
5f5c8ee5 GM |
9871 | static int hscroll_window_tree P_ ((Lisp_Object)); |
9872 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 9873 | |
5f5c8ee5 GM |
9874 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
9875 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
9876 | that it is not within a certain margin at the window's left and | |
9877 | right border. Value is non-zero if any window's hscroll has been | |
9878 | changed. */ | |
9879 | ||
9880 | static int | |
9881 | hscroll_window_tree (window) | |
9882 | Lisp_Object window; | |
9883 | { | |
9884 | int hscrolled_p = 0; | |
e76d28d5 | 9885 | int hscroll_relative_p = FLOATP (Vhscroll_step); |
1df7e8f0 EZ |
9886 | int hscroll_step_abs = 0; |
9887 | double hscroll_step_rel = 0; | |
9888 | ||
9889 | if (hscroll_relative_p) | |
9890 | { | |
e76d28d5 | 9891 | hscroll_step_rel = XFLOAT_DATA (Vhscroll_step); |
1df7e8f0 EZ |
9892 | if (hscroll_step_rel < 0) |
9893 | { | |
9894 | hscroll_relative_p = 0; | |
9895 | hscroll_step_abs = 0; | |
9896 | } | |
9897 | } | |
e76d28d5 | 9898 | else if (INTEGERP (Vhscroll_step)) |
1df7e8f0 | 9899 | { |
e76d28d5 | 9900 | hscroll_step_abs = XINT (Vhscroll_step); |
1df7e8f0 EZ |
9901 | if (hscroll_step_abs < 0) |
9902 | hscroll_step_abs = 0; | |
9903 | } | |
9904 | else | |
9905 | hscroll_step_abs = 0; | |
9906 | ||
5f5c8ee5 | 9907 | while (WINDOWP (window)) |
90adcf20 | 9908 | { |
5f5c8ee5 | 9909 | struct window *w = XWINDOW (window); |
1df7e8f0 | 9910 | |
5f5c8ee5 GM |
9911 | if (WINDOWP (w->hchild)) |
9912 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
9913 | else if (WINDOWP (w->vchild)) | |
9914 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
9915 | else if (w->cursor.vpos >= 0) | |
9916 | { | |
da8b7f4f KS |
9917 | int h_margin; |
9918 | int text_area_width; | |
92a90e89 GM |
9919 | struct glyph_row *current_cursor_row |
9920 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
9921 | struct glyph_row *desired_cursor_row | |
9922 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
9923 | struct glyph_row *cursor_row | |
9924 | = (desired_cursor_row->enabled_p | |
9925 | ? desired_cursor_row | |
9926 | : current_cursor_row); | |
a2725ab2 | 9927 | |
da8b7f4f | 9928 | text_area_width = window_box_width (w, TEXT_AREA); |
90adcf20 | 9929 | |
5f5c8ee5 | 9930 | /* Scroll when cursor is inside this scroll margin. */ |
da8b7f4f | 9931 | h_margin = hscroll_margin * WINDOW_FRAME_COLUMN_WIDTH (w); |
1df7e8f0 | 9932 | |
5f5c8ee5 | 9933 | if ((XFASTINT (w->hscroll) |
e76d28d5 | 9934 | && w->cursor.x <= h_margin) |
92a90e89 GM |
9935 | || (cursor_row->enabled_p |
9936 | && cursor_row->truncated_on_right_p | |
e76d28d5 | 9937 | && (w->cursor.x >= text_area_width - h_margin))) |
08b610e4 | 9938 | { |
5f5c8ee5 GM |
9939 | struct it it; |
9940 | int hscroll; | |
9941 | struct buffer *saved_current_buffer; | |
9942 | int pt; | |
1df7e8f0 | 9943 | int wanted_x; |
5f5c8ee5 GM |
9944 | |
9945 | /* Find point in a display of infinite width. */ | |
9946 | saved_current_buffer = current_buffer; | |
9947 | current_buffer = XBUFFER (w->buffer); | |
1df7e8f0 | 9948 | |
5f5c8ee5 GM |
9949 | if (w == XWINDOW (selected_window)) |
9950 | pt = BUF_PT (current_buffer); | |
9951 | else | |
08b610e4 | 9952 | { |
5f5c8ee5 GM |
9953 | pt = marker_position (w->pointm); |
9954 | pt = max (BEGV, pt); | |
9955 | pt = min (ZV, pt); | |
9956 | } | |
9957 | ||
9958 | /* Move iterator to pt starting at cursor_row->start in | |
9959 | a line with infinite width. */ | |
9960 | init_to_row_start (&it, w, cursor_row); | |
9961 | it.last_visible_x = INFINITY; | |
9962 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
9963 | current_buffer = saved_current_buffer; | |
9964 | ||
1df7e8f0 EZ |
9965 | /* Position cursor in window. */ |
9966 | if (!hscroll_relative_p && hscroll_step_abs == 0) | |
ec110e9e KS |
9967 | hscroll = max (0, (it.current_x |
9968 | - (ITERATOR_AT_END_OF_LINE_P (&it) | |
9969 | ? (text_area_width - 4 * FRAME_COLUMN_WIDTH (it.f)) | |
9970 | : (text_area_width / 2)))) | |
da8b7f4f | 9971 | / FRAME_COLUMN_WIDTH (it.f); |
e76d28d5 | 9972 | else if (w->cursor.x >= text_area_width - h_margin) |
1df7e8f0 EZ |
9973 | { |
9974 | if (hscroll_relative_p) | |
9975 | wanted_x = text_area_width * (1 - hscroll_step_rel) | |
e76d28d5 | 9976 | - h_margin; |
1df7e8f0 EZ |
9977 | else |
9978 | wanted_x = text_area_width | |
da8b7f4f | 9979 | - hscroll_step_abs * FRAME_COLUMN_WIDTH (it.f) |
e76d28d5 | 9980 | - h_margin; |
1df7e8f0 | 9981 | hscroll |
da8b7f4f | 9982 | = max (0, it.current_x - wanted_x) / FRAME_COLUMN_WIDTH (it.f); |
1df7e8f0 EZ |
9983 | } |
9984 | else | |
9985 | { | |
9986 | if (hscroll_relative_p) | |
9987 | wanted_x = text_area_width * hscroll_step_rel | |
e76d28d5 | 9988 | + h_margin; |
1df7e8f0 | 9989 | else |
da8b7f4f | 9990 | wanted_x = hscroll_step_abs * FRAME_COLUMN_WIDTH (it.f) |
e76d28d5 | 9991 | + h_margin; |
1df7e8f0 | 9992 | hscroll |
da8b7f4f | 9993 | = max (0, it.current_x - wanted_x) / FRAME_COLUMN_WIDTH (it.f); |
1df7e8f0 | 9994 | } |
3172f70b | 9995 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
9996 | |
9997 | /* Don't call Fset_window_hscroll if value hasn't | |
9998 | changed because it will prevent redisplay | |
9999 | optimizations. */ | |
10000 | if (XFASTINT (w->hscroll) != hscroll) | |
10001 | { | |
3172f70b GM |
10002 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
10003 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 10004 | hscrolled_p = 1; |
08b610e4 | 10005 | } |
08b610e4 | 10006 | } |
08b610e4 | 10007 | } |
a2725ab2 | 10008 | |
5f5c8ee5 | 10009 | window = w->next; |
90adcf20 | 10010 | } |
cd6dfed6 | 10011 | |
5f5c8ee5 GM |
10012 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
10013 | return hscrolled_p; | |
10014 | } | |
10015 | ||
10016 | ||
10017 | /* Set hscroll so that cursor is visible and not inside horizontal | |
10018 | scroll margins for all windows in the tree rooted at WINDOW. See | |
10019 | also hscroll_window_tree above. Value is non-zero if any window's | |
10020 | hscroll has been changed. If it has, desired matrices on the frame | |
10021 | of WINDOW are cleared. */ | |
10022 | ||
10023 | static int | |
10024 | hscroll_windows (window) | |
10025 | Lisp_Object window; | |
10026 | { | |
d475bcb8 | 10027 | int hscrolled_p; |
2311178e | 10028 | |
d475bcb8 GM |
10029 | if (automatic_hscrolling_p) |
10030 | { | |
10031 | hscrolled_p = hscroll_window_tree (window); | |
10032 | if (hscrolled_p) | |
10033 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
10034 | } | |
10035 | else | |
10036 | hscrolled_p = 0; | |
5f5c8ee5 | 10037 | return hscrolled_p; |
90adcf20 | 10038 | } |
5f5c8ee5 GM |
10039 | |
10040 | ||
90adcf20 | 10041 | \f |
5f5c8ee5 GM |
10042 | /************************************************************************ |
10043 | Redisplay | |
10044 | ************************************************************************/ | |
10045 | ||
10046 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
10047 | to a non-zero value. This is sometimes handy to have in a debugger | |
10048 | session. */ | |
10049 | ||
10050 | #if GLYPH_DEBUG | |
a2889657 | 10051 | |
5f5c8ee5 GM |
10052 | /* First and last unchanged row for try_window_id. */ |
10053 | ||
10054 | int debug_first_unchanged_at_end_vpos; | |
10055 | int debug_last_unchanged_at_beg_vpos; | |
10056 | ||
10057 | /* Delta vpos and y. */ | |
10058 | ||
10059 | int debug_dvpos, debug_dy; | |
10060 | ||
10061 | /* Delta in characters and bytes for try_window_id. */ | |
10062 | ||
10063 | int debug_delta, debug_delta_bytes; | |
10064 | ||
10065 | /* Values of window_end_pos and window_end_vpos at the end of | |
10066 | try_window_id. */ | |
10067 | ||
31ade731 | 10068 | EMACS_INT debug_end_pos, debug_end_vpos; |
5f5c8ee5 GM |
10069 | |
10070 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
10071 | format string. A1...A9 are a supplement for a variable-length | |
10072 | argument list. If trace_redisplay_p is non-zero also printf the | |
10073 | resulting string to stderr. */ | |
10074 | ||
10075 | static void | |
10076 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
10077 | struct window *w; | |
10078 | char *fmt; | |
10079 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
10080 | { | |
10081 | char buffer[512]; | |
10082 | char *method = w->desired_matrix->method; | |
10083 | int len = strlen (method); | |
10084 | int size = sizeof w->desired_matrix->method; | |
10085 | int remaining = size - len - 1; | |
10086 | ||
10087 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
10088 | if (len && remaining) | |
10089 | { | |
10090 | method[len] = '|'; | |
10091 | --remaining, ++len; | |
10092 | } | |
2311178e | 10093 | |
5f5c8ee5 GM |
10094 | strncpy (method + len, buffer, remaining); |
10095 | ||
10096 | if (trace_redisplay_p) | |
10097 | fprintf (stderr, "%p (%s): %s\n", | |
10098 | w, | |
10099 | ((BUFFERP (w->buffer) | |
10100 | && STRINGP (XBUFFER (w->buffer)->name)) | |
2051c264 | 10101 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
5f5c8ee5 GM |
10102 | : "no buffer"), |
10103 | buffer); | |
10104 | } | |
a2889657 | 10105 | |
5f5c8ee5 | 10106 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 10107 | |
a2889657 | 10108 | |
5f5c8ee5 GM |
10109 | /* Value is non-zero if all changes in window W, which displays |
10110 | current_buffer, are in the text between START and END. START is a | |
10111 | buffer position, END is given as a distance from Z. Used in | |
10112 | redisplay_internal for display optimization. */ | |
10113 | ||
10114 | static INLINE int | |
10115 | text_outside_line_unchanged_p (w, start, end) | |
10116 | struct window *w; | |
10117 | int start, end; | |
10118 | { | |
10119 | int unchanged_p = 1; | |
2311178e | 10120 | |
5f5c8ee5 GM |
10121 | /* If text or overlays have changed, see where. */ |
10122 | if (XFASTINT (w->last_modified) < MODIFF | |
10123 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
10124 | { | |
10125 | /* Gap in the line? */ | |
10126 | if (GPT < start || Z - GPT < end) | |
10127 | unchanged_p = 0; | |
10128 | ||
10129 | /* Changes start in front of the line, or end after it? */ | |
10130 | if (unchanged_p | |
9142dd5b GM |
10131 | && (BEG_UNCHANGED < start - 1 |
10132 | || END_UNCHANGED < end)) | |
5f5c8ee5 | 10133 | unchanged_p = 0; |
2311178e | 10134 | |
5f5c8ee5 GM |
10135 | /* If selective display, can't optimize if changes start at the |
10136 | beginning of the line. */ | |
10137 | if (unchanged_p | |
10138 | && INTEGERP (current_buffer->selective_display) | |
10139 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 10140 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 10141 | unchanged_p = 0; |
47d57b22 GM |
10142 | |
10143 | /* If there are overlays at the start or end of the line, these | |
10144 | may have overlay strings with newlines in them. A change at | |
10145 | START, for instance, may actually concern the display of such | |
10146 | overlay strings as well, and they are displayed on different | |
10147 | lines. So, quickly rule out this case. (For the future, it | |
10148 | might be desirable to implement something more telling than | |
10149 | just BEG/END_UNCHANGED.) */ | |
10150 | if (unchanged_p) | |
10151 | { | |
10152 | if (BEG + BEG_UNCHANGED == start | |
10153 | && overlay_touches_p (start)) | |
10154 | unchanged_p = 0; | |
10155 | if (END_UNCHANGED == end | |
10156 | && overlay_touches_p (Z - end)) | |
10157 | unchanged_p = 0; | |
10158 | } | |
5f5c8ee5 GM |
10159 | } |
10160 | ||
10161 | return unchanged_p; | |
10162 | } | |
10163 | ||
10164 | ||
10165 | /* Do a frame update, taking possible shortcuts into account. This is | |
10166 | the main external entry point for redisplay. | |
10167 | ||
10168 | If the last redisplay displayed an echo area message and that message | |
10169 | is no longer requested, we clear the echo area or bring back the | |
10170 | mini-buffer if that is in use. */ | |
20de20dc | 10171 | |
a2889657 JB |
10172 | void |
10173 | redisplay () | |
e9874cee RS |
10174 | { |
10175 | redisplay_internal (0); | |
10176 | } | |
10177 | ||
47d57b22 | 10178 | |
351b5434 | 10179 | static Lisp_Object |
25bcb353 | 10180 | overlay_arrow_string_or_property (var) |
351b5434 | 10181 | Lisp_Object var; |
351b5434 | 10182 | { |
25bcb353 | 10183 | Lisp_Object val; |
351b5434 | 10184 | |
25bcb353 KS |
10185 | if (val = Fget (var, Qoverlay_arrow_string), STRINGP (val)) |
10186 | return val; | |
351b5434 | 10187 | |
351b5434 KS |
10188 | return Voverlay_arrow_string; |
10189 | } | |
10190 | ||
10191 | /* Return 1 if there are any overlay-arrows in current_buffer. */ | |
10192 | static int | |
10193 | overlay_arrow_in_current_buffer_p () | |
10194 | { | |
10195 | Lisp_Object vlist; | |
10196 | ||
10197 | for (vlist = Voverlay_arrow_variable_list; | |
10198 | CONSP (vlist); | |
10199 | vlist = XCDR (vlist)) | |
10200 | { | |
10201 | Lisp_Object var = XCAR (vlist); | |
10202 | Lisp_Object val; | |
10203 | ||
10204 | if (!SYMBOLP (var)) | |
10205 | continue; | |
10206 | val = find_symbol_value (var); | |
10207 | if (MARKERP (val) | |
10208 | && current_buffer == XMARKER (val)->buffer) | |
10209 | return 1; | |
10210 | } | |
10211 | return 0; | |
10212 | } | |
10213 | ||
10214 | ||
10215 | /* Return 1 if any overlay_arrows have moved or overlay-arrow-string | |
10216 | has changed. */ | |
10217 | ||
10218 | static int | |
10219 | overlay_arrows_changed_p () | |
10220 | { | |
10221 | Lisp_Object vlist; | |
10222 | ||
10223 | for (vlist = Voverlay_arrow_variable_list; | |
10224 | CONSP (vlist); | |
10225 | vlist = XCDR (vlist)) | |
10226 | { | |
10227 | Lisp_Object var = XCAR (vlist); | |
10228 | Lisp_Object val, pstr; | |
10229 | ||
10230 | if (!SYMBOLP (var)) | |
10231 | continue; | |
10232 | val = find_symbol_value (var); | |
10233 | if (!MARKERP (val)) | |
10234 | continue; | |
10235 | if (! EQ (COERCE_MARKER (val), | |
10236 | Fget (var, Qlast_arrow_position)) | |
25bcb353 | 10237 | || ! (pstr = overlay_arrow_string_or_property (var), |
351b5434 KS |
10238 | EQ (pstr, Fget (var, Qlast_arrow_string)))) |
10239 | return 1; | |
10240 | } | |
10241 | return 0; | |
10242 | } | |
10243 | ||
10244 | /* Mark overlay arrows to be updated on next redisplay. */ | |
10245 | ||
10246 | static void | |
10247 | update_overlay_arrows (up_to_date) | |
10248 | int up_to_date; | |
10249 | { | |
10250 | Lisp_Object vlist; | |
10251 | ||
10252 | for (vlist = Voverlay_arrow_variable_list; | |
10253 | CONSP (vlist); | |
10254 | vlist = XCDR (vlist)) | |
10255 | { | |
10256 | Lisp_Object var = XCAR (vlist); | |
351b5434 KS |
10257 | |
10258 | if (!SYMBOLP (var)) | |
10259 | continue; | |
10260 | ||
409368b9 | 10261 | if (up_to_date > 0) |
351b5434 | 10262 | { |
7d90b587 | 10263 | Lisp_Object val = find_symbol_value (var); |
351b5434 | 10264 | Fput (var, Qlast_arrow_position, |
7d90b587 | 10265 | COERCE_MARKER (val)); |
351b5434 | 10266 | Fput (var, Qlast_arrow_string, |
25bcb353 | 10267 | overlay_arrow_string_or_property (var)); |
351b5434 KS |
10268 | } |
10269 | else if (up_to_date < 0 | |
10270 | || !NILP (Fget (var, Qlast_arrow_position))) | |
10271 | { | |
10272 | Fput (var, Qlast_arrow_position, Qt); | |
10273 | Fput (var, Qlast_arrow_string, Qt); | |
10274 | } | |
10275 | } | |
10276 | } | |
10277 | ||
10278 | ||
c514efbb | 10279 | /* Return overlay arrow string to display at row. |
25bcb353 | 10280 | Return integer (bitmap number) for arrow bitmap in left fringe. |
c514efbb | 10281 | Return nil if no overlay arrow. */ |
351b5434 KS |
10282 | |
10283 | static Lisp_Object | |
25bcb353 | 10284 | overlay_arrow_at_row (it, row) |
c514efbb | 10285 | struct it *it; |
351b5434 | 10286 | struct glyph_row *row; |
351b5434 KS |
10287 | { |
10288 | Lisp_Object vlist; | |
10289 | ||
10290 | for (vlist = Voverlay_arrow_variable_list; | |
10291 | CONSP (vlist); | |
10292 | vlist = XCDR (vlist)) | |
10293 | { | |
10294 | Lisp_Object var = XCAR (vlist); | |
10295 | Lisp_Object val; | |
10296 | ||
10297 | if (!SYMBOLP (var)) | |
10298 | continue; | |
10299 | ||
10300 | val = find_symbol_value (var); | |
be21b925 | 10301 | |
351b5434 KS |
10302 | if (MARKERP (val) |
10303 | && current_buffer == XMARKER (val)->buffer | |
10304 | && (MATRIX_ROW_START_CHARPOS (row) == marker_position (val))) | |
10305 | { | |
c514efbb KS |
10306 | if (FRAME_WINDOW_P (it->f) |
10307 | && WINDOW_LEFT_FRINGE_WIDTH (it->w) > 0) | |
25bcb353 | 10308 | { |
025568d9 | 10309 | #ifdef HAVE_WINDOW_SYSTEM |
25bcb353 KS |
10310 | if (val = Fget (var, Qoverlay_arrow_bitmap), SYMBOLP (val)) |
10311 | { | |
10312 | int fringe_bitmap; | |
10313 | if ((fringe_bitmap = lookup_fringe_bitmap (val)) != 0) | |
10314 | return make_number (fringe_bitmap); | |
10315 | } | |
025568d9 | 10316 | #endif |
25bcb353 KS |
10317 | return make_number (-1); /* Use default arrow bitmap */ |
10318 | } | |
10319 | return overlay_arrow_string_or_property (var); | |
351b5434 KS |
10320 | } |
10321 | } | |
10322 | ||
351b5434 KS |
10323 | return Qnil; |
10324 | } | |
10325 | ||
260a86a0 KH |
10326 | /* Return 1 if point moved out of or into a composition. Otherwise |
10327 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
10328 | position. BUF and PT are the current point buffer and position. */ | |
10329 | ||
10330 | int | |
10331 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
10332 | struct buffer *prev_buf, *buf; | |
10333 | int prev_pt, pt; | |
10334 | { | |
10335 | int start, end; | |
10336 | Lisp_Object prop; | |
10337 | Lisp_Object buffer; | |
10338 | ||
10339 | XSETBUFFER (buffer, buf); | |
10340 | /* Check a composition at the last point if point moved within the | |
10341 | same buffer. */ | |
10342 | if (prev_buf == buf) | |
10343 | { | |
10344 | if (prev_pt == pt) | |
10345 | /* Point didn't move. */ | |
10346 | return 0; | |
2311178e | 10347 | |
260a86a0 KH |
10348 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) |
10349 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
10350 | && COMPOSITION_VALID_P (start, end, prop) | |
10351 | && start < prev_pt && end > prev_pt) | |
10352 | /* The last point was within the composition. Return 1 iff | |
10353 | point moved out of the composition. */ | |
10354 | return (pt <= start || pt >= end); | |
10355 | } | |
10356 | ||
10357 | /* Check a composition at the current point. */ | |
10358 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
10359 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
10360 | && COMPOSITION_VALID_P (start, end, prop) | |
10361 | && start < pt && end > pt); | |
10362 | } | |
5f5c8ee5 | 10363 | |
47d57b22 | 10364 | |
9142dd5b GM |
10365 | /* Reconsider the setting of B->clip_changed which is displayed |
10366 | in window W. */ | |
10367 | ||
10368 | static INLINE void | |
10369 | reconsider_clip_changes (w, b) | |
10370 | struct window *w; | |
10371 | struct buffer *b; | |
10372 | { | |
c62c1bb5 | 10373 | if (b->clip_changed |
9142dd5b GM |
10374 | && !NILP (w->window_end_valid) |
10375 | && w->current_matrix->buffer == b | |
10376 | && w->current_matrix->zv == BUF_ZV (b) | |
10377 | && w->current_matrix->begv == BUF_BEGV (b)) | |
10378 | b->clip_changed = 0; | |
260a86a0 KH |
10379 | |
10380 | /* If display wasn't paused, and W is not a tool bar window, see if | |
10381 | point has been moved into or out of a composition. In that case, | |
10382 | we set b->clip_changed to 1 to force updating the screen. If | |
10383 | b->clip_changed has already been set to 1, we can skip this | |
10384 | check. */ | |
10385 | if (!b->clip_changed | |
10386 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
10387 | { | |
10388 | int pt; | |
10389 | ||
10390 | if (w == XWINDOW (selected_window)) | |
10391 | pt = BUF_PT (current_buffer); | |
10392 | else | |
10393 | pt = marker_position (w->pointm); | |
10394 | ||
10395 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 10396 | || pt != XINT (w->last_point)) |
260a86a0 | 10397 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 10398 | XINT (w->last_point), |
260a86a0 KH |
10399 | XBUFFER (w->buffer), pt)) |
10400 | b->clip_changed = 1; | |
10401 | } | |
9142dd5b | 10402 | } |
aac2d8b2 | 10403 | \f |
dd429b03 KH |
10404 | |
10405 | /* Select FRAME to forward the values of frame-local variables into C | |
10406 | variables so that the redisplay routines can access those values | |
10407 | directly. */ | |
10408 | ||
10409 | static void | |
10410 | select_frame_for_redisplay (frame) | |
10411 | Lisp_Object frame; | |
10412 | { | |
10413 | Lisp_Object tail, sym, val; | |
10414 | Lisp_Object old = selected_frame; | |
be21b925 | 10415 | |
dd429b03 KH |
10416 | selected_frame = frame; |
10417 | ||
10418 | for (tail = XFRAME (frame)->param_alist; CONSP (tail); tail = XCDR (tail)) | |
10419 | if (CONSP (XCAR (tail)) | |
10420 | && (sym = XCAR (XCAR (tail)), | |
10421 | SYMBOLP (sym)) | |
10422 | && (sym = indirect_variable (sym), | |
10423 | val = SYMBOL_VALUE (sym), | |
10424 | (BUFFER_LOCAL_VALUEP (val) | |
10425 | || SOME_BUFFER_LOCAL_VALUEP (val))) | |
10426 | && XBUFFER_LOCAL_VALUE (val)->check_frame) | |
673b8d0e RS |
10427 | /* Use find_symbol_value rather than Fsymbol_value |
10428 | to avoid an error if it is void. */ | |
10429 | find_symbol_value (sym); | |
dd429b03 KH |
10430 | |
10431 | for (tail = XFRAME (old)->param_alist; CONSP (tail); tail = XCDR (tail)) | |
10432 | if (CONSP (XCAR (tail)) | |
10433 | && (sym = XCAR (XCAR (tail)), | |
10434 | SYMBOLP (sym)) | |
10435 | && (sym = indirect_variable (sym), | |
10436 | val = SYMBOL_VALUE (sym), | |
10437 | (BUFFER_LOCAL_VALUEP (val) | |
10438 | || SOME_BUFFER_LOCAL_VALUEP (val))) | |
10439 | && XBUFFER_LOCAL_VALUE (val)->check_frame) | |
673b8d0e | 10440 | find_symbol_value (sym); |
dd429b03 KH |
10441 | } |
10442 | ||
10443 | ||
aac2d8b2 RS |
10444 | #define STOP_POLLING \ |
10445 | do { if (! polling_stopped_here) stop_polling (); \ | |
10446 | polling_stopped_here = 1; } while (0) | |
10447 | ||
10448 | #define RESUME_POLLING \ | |
10449 | do { if (polling_stopped_here) start_polling (); \ | |
10450 | polling_stopped_here = 0; } while (0) | |
9142dd5b GM |
10451 | |
10452 | ||
5f5c8ee5 GM |
10453 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
10454 | response to any user action; therefore, we should preserve the echo | |
10455 | area. (Actually, our caller does that job.) Perhaps in the future | |
10456 | avoid recentering windows if it is not necessary; currently that | |
10457 | causes some problems. */ | |
e9874cee RS |
10458 | |
10459 | static void | |
10460 | redisplay_internal (preserve_echo_area) | |
10461 | int preserve_echo_area; | |
a2889657 | 10462 | { |
5f5c8ee5 GM |
10463 | struct window *w = XWINDOW (selected_window); |
10464 | struct frame *f = XFRAME (w->frame); | |
10465 | int pause; | |
a2889657 | 10466 | int must_finish = 0; |
5f5c8ee5 | 10467 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 10468 | int number_of_visible_frames; |
28514cd9 | 10469 | int count; |
886bd6f2 | 10470 | struct frame *sf = SELECTED_FRAME (); |
aac2d8b2 | 10471 | int polling_stopped_here = 0; |
a2889657 | 10472 | |
5f5c8ee5 GM |
10473 | /* Non-zero means redisplay has to consider all windows on all |
10474 | frames. Zero means, only selected_window is considered. */ | |
10475 | int consider_all_windows_p; | |
2311178e | 10476 | |
5f5c8ee5 GM |
10477 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); |
10478 | ||
10479 | /* No redisplay if running in batch mode or frame is not yet fully | |
10480 | initialized, or redisplay is explicitly turned off by setting | |
10481 | Vinhibit_redisplay. */ | |
10482 | if (noninteractive | |
10483 | || !NILP (Vinhibit_redisplay) | |
10484 | || !f->glyphs_initialized_p) | |
a2889657 JB |
10485 | return; |
10486 | ||
5f5c8ee5 GM |
10487 | /* The flag redisplay_performed_directly_p is set by |
10488 | direct_output_for_insert when it already did the whole screen | |
10489 | update necessary. */ | |
10490 | if (redisplay_performed_directly_p) | |
10491 | { | |
10492 | redisplay_performed_directly_p = 0; | |
10493 | if (!hscroll_windows (selected_window)) | |
10494 | return; | |
10495 | } | |
10496 | ||
488dd4c4 | 10497 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
15f0cf78 RS |
10498 | if (popup_activated ()) |
10499 | return; | |
10500 | #endif | |
10501 | ||
28514cd9 | 10502 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 10503 | if (redisplaying_p) |
735c094c KH |
10504 | return; |
10505 | ||
28514cd9 GM |
10506 | /* Record a function that resets redisplaying_p to its old value |
10507 | when we leave this function. */ | |
331379bf | 10508 | count = SPECPDL_INDEX (); |
dd429b03 KH |
10509 | record_unwind_protect (unwind_redisplay, |
10510 | Fcons (make_number (redisplaying_p), selected_frame)); | |
28514cd9 | 10511 | ++redisplaying_p; |
26683087 | 10512 | specbind (Qinhibit_free_realized_faces, Qnil); |
2311178e | 10513 | |
a61fed91 KS |
10514 | { |
10515 | Lisp_Object tail, frame; | |
10516 | ||
10517 | FOR_EACH_FRAME (tail, frame) | |
10518 | { | |
10519 | struct frame *f = XFRAME (frame); | |
10520 | f->already_hscrolled_p = 0; | |
10521 | } | |
10522 | } | |
10523 | ||
8b32d885 | 10524 | retry: |
bd9d0f3f | 10525 | pause = 0; |
9142dd5b GM |
10526 | reconsider_clip_changes (w, current_buffer); |
10527 | ||
5f5c8ee5 GM |
10528 | /* If new fonts have been loaded that make a glyph matrix adjustment |
10529 | necessary, do it. */ | |
10530 | if (fonts_changed_p) | |
10531 | { | |
10532 | adjust_glyphs (NULL); | |
10533 | ++windows_or_buffers_changed; | |
10534 | fonts_changed_p = 0; | |
10535 | } | |
10536 | ||
6961e0c1 GM |
10537 | /* If face_change_count is non-zero, init_iterator will free all |
10538 | realized faces, which includes the faces referenced from current | |
10539 | matrices. So, we can't reuse current matrices in this case. */ | |
10540 | if (face_change_count) | |
10541 | ++windows_or_buffers_changed; | |
10542 | ||
886bd6f2 GM |
10543 | if (! FRAME_WINDOW_P (sf) |
10544 | && previous_terminal_frame != sf) | |
20de20dc | 10545 | { |
5f5c8ee5 GM |
10546 | /* Since frames on an ASCII terminal share the same display |
10547 | area, displaying a different frame means redisplay the whole | |
10548 | thing. */ | |
20de20dc | 10549 | windows_or_buffers_changed++; |
886bd6f2 GM |
10550 | SET_FRAME_GARBAGED (sf); |
10551 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 10552 | } |
886bd6f2 | 10553 | previous_terminal_frame = sf; |
20de20dc | 10554 | |
5f5c8ee5 GM |
10555 | /* Set the visible flags for all frames. Do this before checking |
10556 | for resized or garbaged frames; they want to know if their frames | |
10557 | are visible. See the comment in frame.h for | |
10558 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 10559 | { |
35f56f96 | 10560 | Lisp_Object tail, frame; |
d724d989 | 10561 | |
89819bdd RS |
10562 | number_of_visible_frames = 0; |
10563 | ||
35f56f96 | 10564 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 10565 | { |
5f5c8ee5 | 10566 | struct frame *f = XFRAME (frame); |
2311178e | 10567 | |
5f5c8ee5 GM |
10568 | FRAME_SAMPLE_VISIBILITY (f); |
10569 | if (FRAME_VISIBLE_P (f)) | |
10570 | ++number_of_visible_frames; | |
10571 | clear_desired_matrices (f); | |
f82aff7c | 10572 | } |
d724d989 JB |
10573 | } |
10574 | ||
44fa5b1e | 10575 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 10576 | do_pending_window_change (1); |
a2889657 | 10577 | |
5f5c8ee5 | 10578 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 10579 | if (frame_garbaged) |
c6e89d6c | 10580 | clear_garbaged_frames (); |
a2889657 | 10581 | |
e037b9ec | 10582 | /* Build menubar and tool-bar items. */ |
f5b8d5f2 RS |
10583 | if (NILP (Vmemory_full)) |
10584 | prepare_menu_bars (); | |
f82aff7c | 10585 | |
28995e67 | 10586 | if (windows_or_buffers_changed) |
a2889657 JB |
10587 | update_mode_lines++; |
10588 | ||
538f13d4 RS |
10589 | /* Detect case that we need to write or remove a star in the mode line. */ |
10590 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
10591 | { |
10592 | w->update_mode_line = Qt; | |
10593 | if (buffer_shared > 1) | |
10594 | update_mode_lines++; | |
10595 | } | |
10596 | ||
5f5c8ee5 | 10597 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
10598 | if (!NILP (w->column_number_displayed) |
10599 | /* This alternative quickly identifies a common case | |
10600 | where no change is needed. */ | |
10601 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
10602 | && XFASTINT (w->last_modified) >= MODIFF |
10603 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
10604 | && (XFASTINT (w->column_number_displayed) |
10605 | != (int) current_column ())) /* iftc */ | |
10606 | w->update_mode_line = Qt; | |
28995e67 | 10607 | |
44fa5b1e | 10608 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 10609 | |
5f5c8ee5 GM |
10610 | /* The variable buffer_shared is set in redisplay_window and |
10611 | indicates that we redisplay a buffer in different windows. See | |
10612 | there. */ | |
5fb96e96 RS |
10613 | consider_all_windows_p = (update_mode_lines || buffer_shared > 1 |
10614 | || cursor_type_changed); | |
a2889657 JB |
10615 | |
10616 | /* If specs for an arrow have changed, do thorough redisplay | |
10617 | to ensure we remove any arrow that should no longer exist. */ | |
351b5434 | 10618 | if (overlay_arrows_changed_p ()) |
5f5c8ee5 | 10619 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 10620 | |
90adcf20 RS |
10621 | /* Normally the message* functions will have already displayed and |
10622 | updated the echo area, but the frame may have been trashed, or | |
10623 | the update may have been preempted, so display the echo area | |
6e019995 | 10624 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 10625 | the echo area should be cleared. */ |
96d5e9a0 GM |
10626 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
10627 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
10628 | || (message_cleared_p |
10629 | && minibuf_level == 0 | |
10630 | /* If the mini-window is currently selected, this means the | |
10631 | echo-area doesn't show through. */ | |
10632 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 10633 | { |
c6e89d6c | 10634 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 10635 | must_finish = 1; |
6e019995 GM |
10636 | |
10637 | /* If we don't display the current message, don't clear the | |
10638 | message_cleared_p flag, because, if we did, we wouldn't clear | |
10639 | the echo area in the next redisplay which doesn't preserve | |
10640 | the echo area. */ | |
10641 | if (!display_last_displayed_message_p) | |
10642 | message_cleared_p = 0; | |
2311178e | 10643 | |
c6e89d6c GM |
10644 | if (fonts_changed_p) |
10645 | goto retry; | |
10646 | else if (window_height_changed_p) | |
10647 | { | |
10648 | consider_all_windows_p = 1; | |
10649 | ++update_mode_lines; | |
10650 | ++windows_or_buffers_changed; | |
2311178e | 10651 | |
9142dd5b GM |
10652 | /* If window configuration was changed, frames may have been |
10653 | marked garbaged. Clear them or we will experience | |
10654 | surprises wrt scrolling. */ | |
10655 | if (frame_garbaged) | |
10656 | clear_garbaged_frames (); | |
c6e89d6c | 10657 | } |
90adcf20 | 10658 | } |
97a36635 | 10659 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
10660 | && (current_buffer->clip_changed |
10661 | || XFASTINT (w->last_modified) < MODIFF | |
10662 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 10663 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
10664 | { |
10665 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
10666 | showing if its contents might have changed. */ |
10667 | must_finish = 1; | |
10668 | consider_all_windows_p = 1; | |
c6e89d6c | 10669 | ++windows_or_buffers_changed; |
dd2eb166 | 10670 | ++update_mode_lines; |
2311178e | 10671 | |
9142dd5b GM |
10672 | /* If window configuration was changed, frames may have been |
10673 | marked garbaged. Clear them or we will experience | |
10674 | surprises wrt scrolling. */ | |
10675 | if (frame_garbaged) | |
10676 | clear_garbaged_frames (); | |
c6e89d6c | 10677 | } |
2311178e | 10678 | |
90adcf20 | 10679 | |
5f5c8ee5 GM |
10680 | /* If showing the region, and mark has changed, we must redisplay |
10681 | the whole window. The assignment to this_line_start_pos prevents | |
10682 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
10683 | if (((!NILP (Vtransient_mark_mode) |
10684 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
10685 | != !NILP (w->region_showing)) | |
82d04750 JB |
10686 | || (!NILP (w->region_showing) |
10687 | && !EQ (w->region_showing, | |
10688 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
10689 | CHARPOS (this_line_start_pos) = 0; |
10690 | ||
10691 | /* Optimize the case that only the line containing the cursor in the | |
10692 | selected window has changed. Variables starting with this_ are | |
10693 | set in display_line and record information about the line | |
10694 | containing the cursor. */ | |
10695 | tlbufpos = this_line_start_pos; | |
10696 | tlendpos = this_line_end_pos; | |
10697 | if (!consider_all_windows_p | |
10698 | && CHARPOS (tlbufpos) > 0 | |
10699 | && NILP (w->update_mode_line) | |
73af359d | 10700 | && !current_buffer->clip_changed |
c62c1bb5 | 10701 | && !current_buffer->prevent_redisplay_optimizations_p |
44fa5b1e | 10702 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 10703 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 10704 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
10705 | && this_line_buffer == current_buffer |
10706 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 10707 | && NILP (w->force_start) |
acda20e1 | 10708 | && NILP (w->optional_new_start) |
5f5c8ee5 GM |
10709 | /* Point must be on the line that we have info recorded about. */ |
10710 | && PT >= CHARPOS (tlbufpos) | |
10711 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
10712 | /* All text outside that line, including its final newline, |
10713 | must be unchanged */ | |
5f5c8ee5 GM |
10714 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
10715 | CHARPOS (tlendpos))) | |
10716 | { | |
10717 | if (CHARPOS (tlbufpos) > BEGV | |
10718 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
10719 | && (CHARPOS (tlbufpos) == ZV | |
10720 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
10721 | /* Former continuation line has disappeared by becoming empty */ |
10722 | goto cancel; | |
10723 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 10724 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
10725 | || MINI_WINDOW_P (w)) |
10726 | { | |
1c9241f5 KH |
10727 | /* We have to handle the case of continuation around a |
10728 | wide-column character (See the comment in indent.c around | |
10729 | line 885). | |
10730 | ||
10731 | For instance, in the following case: | |
10732 | ||
10733 | -------- Insert -------- | |
10734 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
10735 | J_I_ ==> J_I_ `^^' are cursors. | |
10736 | ^^ ^^ | |
10737 | -------- -------- | |
10738 | ||
10739 | As we have to redraw the line above, we should goto cancel. */ | |
10740 | ||
5f5c8ee5 GM |
10741 | struct it it; |
10742 | int line_height_before = this_line_pixel_height; | |
10743 | ||
10744 | /* Note that start_display will handle the case that the | |
10745 | line starting at tlbufpos is a continuation lines. */ | |
10746 | start_display (&it, w, tlbufpos); | |
10747 | ||
10748 | /* Implementation note: It this still necessary? */ | |
10749 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
10750 | goto cancel; |
10751 | ||
5f5c8ee5 GM |
10752 | TRACE ((stderr, "trying display optimization 1\n")); |
10753 | w->cursor.vpos = -1; | |
a2889657 | 10754 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
10755 | it.vpos = this_line_vpos; |
10756 | it.current_y = this_line_y; | |
10757 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
10758 | display_line (&it); | |
10759 | ||
a2889657 | 10760 | /* If line contains point, is not continued, |
5f5c8ee5 | 10761 | and ends at same distance from eob as before, we win */ |
2311178e | 10762 | if (w->cursor.vpos >= 0 |
5f5c8ee5 GM |
10763 | /* Line is not continued, otherwise this_line_start_pos |
10764 | would have been set to 0 in display_line. */ | |
10765 | && CHARPOS (this_line_start_pos) | |
10766 | /* Line ends as before. */ | |
10767 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
10768 | /* Line has same height as before. Otherwise other lines | |
10769 | would have to be shifted up or down. */ | |
10770 | && this_line_pixel_height == line_height_before) | |
a2889657 | 10771 | { |
5f5c8ee5 GM |
10772 | /* If this is not the window's last line, we must adjust |
10773 | the charstarts of the lines below. */ | |
10774 | if (it.current_y < it.last_visible_y) | |
10775 | { | |
10776 | struct glyph_row *row | |
10777 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
10778 | int delta, delta_bytes; | |
2311178e | 10779 | |
5f5c8ee5 GM |
10780 | if (Z - CHARPOS (tlendpos) == ZV) |
10781 | { | |
10782 | /* This line ends at end of (accessible part of) | |
10783 | buffer. There is no newline to count. */ | |
10784 | delta = (Z | |
10785 | - CHARPOS (tlendpos) | |
10786 | - MATRIX_ROW_START_CHARPOS (row)); | |
10787 | delta_bytes = (Z_BYTE | |
10788 | - BYTEPOS (tlendpos) | |
10789 | - MATRIX_ROW_START_BYTEPOS (row)); | |
10790 | } | |
10791 | else | |
10792 | { | |
10793 | /* This line ends in a newline. Must take | |
10794 | account of the newline and the rest of the | |
10795 | text that follows. */ | |
10796 | delta = (Z | |
10797 | - CHARPOS (tlendpos) | |
10798 | - MATRIX_ROW_START_CHARPOS (row)); | |
10799 | delta_bytes = (Z_BYTE | |
10800 | - BYTEPOS (tlendpos) | |
10801 | - MATRIX_ROW_START_BYTEPOS (row)); | |
10802 | } | |
2311178e | 10803 | |
f2d86d7a GM |
10804 | increment_matrix_positions (w->current_matrix, |
10805 | this_line_vpos + 1, | |
10806 | w->current_matrix->nrows, | |
10807 | delta, delta_bytes); | |
85bcef6c | 10808 | } |
46db8486 | 10809 | |
5f5c8ee5 GM |
10810 | /* If this row displays text now but previously didn't, |
10811 | or vice versa, w->window_end_vpos may have to be | |
10812 | adjusted. */ | |
10813 | if ((it.glyph_row - 1)->displays_text_p) | |
10814 | { | |
10815 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
10816 | XSETINT (w->window_end_vpos, this_line_vpos); | |
10817 | } | |
10818 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
10819 | && this_line_vpos > 0) | |
10820 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
10821 | w->window_end_valid = Qnil; | |
2311178e | 10822 | |
5f5c8ee5 GM |
10823 | /* Update hint: No need to try to scroll in update_window. */ |
10824 | w->desired_matrix->no_scrolling_p = 1; | |
10825 | ||
10826 | #if GLYPH_DEBUG | |
10827 | *w->desired_matrix->method = 0; | |
10828 | debug_method_add (w, "optimization 1"); | |
10829 | #endif | |
7af0e8d7 | 10830 | #ifdef HAVE_WINDOW_SYSTEM |
88e6b646 | 10831 | update_window_fringes (w, 0); |
7af0e8d7 | 10832 | #endif |
a2889657 JB |
10833 | goto update; |
10834 | } | |
10835 | else | |
10836 | goto cancel; | |
10837 | } | |
5f5c8ee5 GM |
10838 | else if (/* Cursor position hasn't changed. */ |
10839 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
10840 | /* Make sure the cursor was last displayed |
10841 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 | 10842 | && 0 <= w->cursor.vpos |
da8b7f4f | 10843 | && WINDOW_TOTAL_LINES (w) > w->cursor.vpos) |
a2889657 JB |
10844 | { |
10845 | if (!must_finish) | |
10846 | { | |
c6e89d6c | 10847 | do_pending_window_change (1); |
5f5c8ee5 | 10848 | |
2311178e | 10849 | /* We used to always goto end_of_redisplay here, but this |
5f5c8ee5 GM |
10850 | isn't enough if we have a blinking cursor. */ |
10851 | if (w->cursor_off_p == w->last_cursor_off_p) | |
10852 | goto end_of_redisplay; | |
a2889657 JB |
10853 | } |
10854 | goto update; | |
10855 | } | |
8b51f1e3 KH |
10856 | /* If highlighting the region, or if the cursor is in the echo area, |
10857 | then we can't just move the cursor. */ | |
bd66d1ba RS |
10858 | else if (! (!NILP (Vtransient_mark_mode) |
10859 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 10860 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 10861 | || highlight_nonselected_windows) |
8b51f1e3 | 10862 | && NILP (w->region_showing) |
8f897821 | 10863 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 10864 | && !cursor_in_echo_area) |
a2889657 | 10865 | { |
5f5c8ee5 GM |
10866 | struct it it; |
10867 | struct glyph_row *row; | |
10868 | ||
10869 | /* Skip from tlbufpos to PT and see where it is. Note that | |
10870 | PT may be in invisible text. If so, we will end at the | |
10871 | next visible position. */ | |
10872 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
10873 | NULL, DEFAULT_FACE_ID); | |
10874 | it.current_x = this_line_start_x; | |
10875 | it.current_y = this_line_y; | |
10876 | it.vpos = this_line_vpos; | |
2311178e | 10877 | |
5f5c8ee5 GM |
10878 | /* The call to move_it_to stops in front of PT, but |
10879 | moves over before-strings. */ | |
10880 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
10881 | ||
10882 | if (it.vpos == this_line_vpos | |
10883 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
10884 | row->enabled_p)) | |
a2889657 | 10885 | { |
5f5c8ee5 GM |
10886 | xassert (this_line_vpos == it.vpos); |
10887 | xassert (this_line_y == it.current_y); | |
10888 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
10889 | #if GLYPH_DEBUG |
10890 | *w->desired_matrix->method = 0; | |
10891 | debug_method_add (w, "optimization 3"); | |
10892 | #endif | |
a2889657 JB |
10893 | goto update; |
10894 | } | |
10895 | else | |
10896 | goto cancel; | |
10897 | } | |
5f5c8ee5 | 10898 | |
a2889657 | 10899 | cancel: |
5f5c8ee5 GM |
10900 | /* Text changed drastically or point moved off of line. */ |
10901 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
10902 | } |
10903 | ||
5f5c8ee5 GM |
10904 | CHARPOS (this_line_start_pos) = 0; |
10905 | consider_all_windows_p |= buffer_shared > 1; | |
10906 | ++clear_face_cache_count; | |
418b5052 KS |
10907 | #ifdef HAVE_WINDOW_SYSTEM |
10908 | ++clear_image_cache_count; | |
10909 | #endif | |
2311178e | 10910 | |
bd9d0f3f GM |
10911 | /* Build desired matrices, and update the display. If |
10912 | consider_all_windows_p is non-zero, do it for all windows on all | |
10913 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 10914 | |
5f5c8ee5 | 10915 | if (consider_all_windows_p) |
a2889657 | 10916 | { |
35f56f96 | 10917 | Lisp_Object tail, frame; |
366717cf RS |
10918 | |
10919 | FOR_EACH_FRAME (tail, frame) | |
2bb212bd | 10920 | XFRAME (frame)->updated_p = 0; |
a2889657 | 10921 | |
5f5c8ee5 GM |
10922 | /* Recompute # windows showing selected buffer. This will be |
10923 | incremented each time such a window is displayed. */ | |
a2889657 JB |
10924 | buffer_shared = 0; |
10925 | ||
35f56f96 | 10926 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 10927 | { |
5f5c8ee5 | 10928 | struct frame *f = XFRAME (frame); |
2311178e | 10929 | |
886bd6f2 | 10930 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 10931 | { |
dd429b03 KH |
10932 | if (! EQ (frame, selected_frame)) |
10933 | /* Select the frame, for the sake of frame-local | |
10934 | variables. */ | |
10935 | select_frame_for_redisplay (frame); | |
10936 | ||
5f5c8ee5 GM |
10937 | /* Mark all the scroll bars to be removed; we'll redeem |
10938 | the ones we want when we redisplay their windows. */ | |
9769686d | 10939 | if (condemn_scroll_bars_hook) |
504454e8 | 10940 | condemn_scroll_bars_hook (f); |
30c566e4 | 10941 | |
f21ef775 | 10942 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 10943 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 10944 | |
5f5c8ee5 GM |
10945 | /* Any scroll bars which redisplay_windows should have |
10946 | nuked should now go away. */ | |
9769686d | 10947 | if (judge_scroll_bars_hook) |
504454e8 | 10948 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
10949 | |
10950 | /* If fonts changed, display again. */ | |
b60c9653 RS |
10951 | /* ??? rms: I suspect it is a mistake to jump all the way |
10952 | back to retry here. It should just retry this frame. */ | |
bd9d0f3f GM |
10953 | if (fonts_changed_p) |
10954 | goto retry; | |
2311178e | 10955 | |
bd9d0f3f GM |
10956 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
10957 | { | |
10958 | /* See if we have to hscroll. */ | |
a61fed91 KS |
10959 | if (!f->already_hscrolled_p) |
10960 | { | |
10961 | f->already_hscrolled_p = 1; | |
10962 | if (hscroll_windows (f->root_window)) | |
10963 | goto retry; | |
10964 | } | |
bd9d0f3f GM |
10965 | |
10966 | /* Prevent various kinds of signals during display | |
10967 | update. stdio is not robust about handling | |
10968 | signals, which can cause an apparent I/O | |
10969 | error. */ | |
10970 | if (interrupt_input) | |
10971 | unrequest_sigio (); | |
aac2d8b2 | 10972 | STOP_POLLING; |
bd9d0f3f GM |
10973 | |
10974 | /* Update the display. */ | |
10975 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
10976 | pause |= update_frame (f, 0, 0); | |
ccbb9ed2 | 10977 | #if 0 /* Exiting the loop can leave the wrong value for buffer_shared. */ |
bd9d0f3f GM |
10978 | if (pause) |
10979 | break; | |
ccbb9ed2 | 10980 | #endif |
bd9d0f3f | 10981 | |
2bb212bd | 10982 | f->updated_p = 1; |
bd9d0f3f | 10983 | } |
9769686d | 10984 | } |
30c566e4 | 10985 | } |
0528abe1 | 10986 | |
6f68b035 GM |
10987 | if (!pause) |
10988 | { | |
10989 | /* Do the mark_window_display_accurate after all windows have | |
10990 | been redisplayed because this call resets flags in buffers | |
10991 | which are needed for proper redisplay. */ | |
2bb212bd | 10992 | FOR_EACH_FRAME (tail, frame) |
6f68b035 | 10993 | { |
2bb212bd KS |
10994 | struct frame *f = XFRAME (frame); |
10995 | if (f->updated_p) | |
10996 | { | |
10997 | mark_window_display_accurate (f->root_window, 1); | |
10998 | if (frame_up_to_date_hook) | |
10999 | frame_up_to_date_hook (f); | |
11000 | } | |
6f68b035 | 11001 | } |
0528abe1 | 11002 | } |
a2889657 | 11003 | } |
bd9d0f3f GM |
11004 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
11005 | { | |
11006 | Lisp_Object mini_window; | |
11007 | struct frame *mini_frame; | |
5f5c8ee5 | 11008 | |
82a7ab23 | 11009 | displayed_buffer = XBUFFER (XWINDOW (selected_window)->buffer); |
7033d6df RS |
11010 | /* Use list_of_error, not Qerror, so that |
11011 | we catch only errors and don't run the debugger. */ | |
11012 | internal_condition_case_1 (redisplay_window_1, selected_window, | |
11013 | list_of_error, | |
82a7ab23 | 11014 | redisplay_window_error); |
2311178e | 11015 | |
bd9d0f3f | 11016 | /* Compare desired and current matrices, perform output. */ |
7d0393cf | 11017 | |
26683087 | 11018 | update: |
bd9d0f3f GM |
11019 | /* If fonts changed, display again. */ |
11020 | if (fonts_changed_p) | |
92a90e89 | 11021 | goto retry; |
a2889657 | 11022 | |
bd9d0f3f GM |
11023 | /* Prevent various kinds of signals during display update. |
11024 | stdio is not robust about handling signals, | |
11025 | which can cause an apparent I/O error. */ | |
11026 | if (interrupt_input) | |
11027 | unrequest_sigio (); | |
aac2d8b2 | 11028 | STOP_POLLING; |
1af9f229 | 11029 | |
bd9d0f3f | 11030 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 11031 | { |
92a90e89 GM |
11032 | if (hscroll_windows (selected_window)) |
11033 | goto retry; | |
2311178e | 11034 | |
5f5c8ee5 | 11035 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 11036 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 11037 | } |
d724d989 | 11038 | |
8de2d90b | 11039 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
11040 | function. If the echo area is on another frame, that may |
11041 | have put text on a frame other than the selected one, so the | |
11042 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 11043 | it here. */ |
bd9d0f3f GM |
11044 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
11045 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
2311178e | 11046 | |
bd9d0f3f GM |
11047 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
11048 | { | |
11049 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
11050 | pause |= update_frame (mini_frame, 0, 0); | |
11051 | if (!pause && hscroll_windows (mini_window)) | |
11052 | goto retry; | |
11053 | } | |
6e8290aa | 11054 | } |
a2889657 | 11055 | |
5f5c8ee5 GM |
11056 | /* If display was paused because of pending input, make sure we do a |
11057 | thorough update the next time. */ | |
a2889657 JB |
11058 | if (pause) |
11059 | { | |
5f5c8ee5 GM |
11060 | /* Prevent the optimization at the beginning of |
11061 | redisplay_internal that tries a single-line update of the | |
11062 | line containing the cursor in the selected window. */ | |
11063 | CHARPOS (this_line_start_pos) = 0; | |
11064 | ||
11065 | /* Let the overlay arrow be updated the next time. */ | |
351b5434 | 11066 | update_overlay_arrows (0); |
2311178e | 11067 | |
5f5c8ee5 GM |
11068 | /* If we pause after scrolling, some rows in the current |
11069 | matrices of some windows are not valid. */ | |
11070 | if (!WINDOW_FULL_WIDTH_P (w) | |
11071 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
11072 | update_mode_lines = 1; |
11073 | } | |
43c09969 | 11074 | else |
a2889657 | 11075 | { |
43c09969 | 11076 | if (!consider_all_windows_p) |
a2889657 | 11077 | { |
43c09969 GM |
11078 | /* This has already been done above if |
11079 | consider_all_windows_p is set. */ | |
11080 | mark_window_display_accurate_1 (w, 1); | |
2311178e | 11081 | |
351b5434 KS |
11082 | /* Say overlay arrows are up to date. */ |
11083 | update_overlay_arrows (1); | |
2311178e | 11084 | |
efc63ef0 | 11085 | if (frame_up_to_date_hook != 0) |
43c09969 | 11086 | frame_up_to_date_hook (sf); |
a2889657 | 11087 | } |
15e26c76 | 11088 | |
a2889657 JB |
11089 | update_mode_lines = 0; |
11090 | windows_or_buffers_changed = 0; | |
5fb96e96 | 11091 | cursor_type_changed = 0; |
a2889657 JB |
11092 | } |
11093 | ||
5f5c8ee5 GM |
11094 | /* Start SIGIO interrupts coming again. Having them off during the |
11095 | code above makes it less likely one will discard output, but not | |
11096 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 11097 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
11098 | if (interrupt_input) |
11099 | request_sigio (); | |
aac2d8b2 | 11100 | RESUME_POLLING; |
a2889657 | 11101 | |
5f5c8ee5 GM |
11102 | /* If a frame has become visible which was not before, redisplay |
11103 | again, so that we display it. Expose events for such a frame | |
11104 | (which it gets when becoming visible) don't call the parts of | |
11105 | redisplay constructing glyphs, so simply exposing a frame won't | |
11106 | display anything in this case. So, we have to display these | |
11107 | frames here explicitly. */ | |
11c52c4f RS |
11108 | if (!pause) |
11109 | { | |
11110 | Lisp_Object tail, frame; | |
11111 | int new_count = 0; | |
11112 | ||
11113 | FOR_EACH_FRAME (tail, frame) | |
11114 | { | |
11115 | int this_is_visible = 0; | |
8e83f802 RS |
11116 | |
11117 | if (XFRAME (frame)->visible) | |
11118 | this_is_visible = 1; | |
11119 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
11120 | if (XFRAME (frame)->visible) | |
11121 | this_is_visible = 1; | |
11c52c4f RS |
11122 | |
11123 | if (this_is_visible) | |
11124 | new_count++; | |
11125 | } | |
11126 | ||
89819bdd | 11127 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
11128 | windows_or_buffers_changed++; |
11129 | } | |
11130 | ||
44fa5b1e | 11131 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 11132 | do_pending_window_change (1); |
d8e242fd | 11133 | |
8b32d885 RS |
11134 | /* If we just did a pending size change, or have additional |
11135 | visible frames, redisplay again. */ | |
3c8c72e0 | 11136 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 11137 | goto retry; |
5f5c8ee5 | 11138 | |
418b5052 KS |
11139 | /* Clear the face cache eventually. */ |
11140 | if (consider_all_windows_p) | |
11141 | { | |
11142 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
11143 | { | |
11144 | clear_face_cache (0); | |
11145 | clear_face_cache_count = 0; | |
11146 | } | |
11147 | #ifdef HAVE_WINDOW_SYSTEM | |
11148 | if (clear_image_cache_count > CLEAR_IMAGE_CACHE_COUNT) | |
11149 | { | |
11150 | Lisp_Object tail, frame; | |
11151 | FOR_EACH_FRAME (tail, frame) | |
11152 | { | |
11153 | struct frame *f = XFRAME (frame); | |
11154 | if (FRAME_WINDOW_P (f)) | |
11155 | clear_image_cache (f, 0); | |
11156 | } | |
11157 | clear_image_cache_count = 0; | |
11158 | } | |
11159 | #endif /* HAVE_WINDOW_SYSTEM */ | |
11160 | } | |
11161 | ||
1987b083 | 11162 | end_of_redisplay: |
28514cd9 | 11163 | unbind_to (count, Qnil); |
aac2d8b2 | 11164 | RESUME_POLLING; |
a2889657 JB |
11165 | } |
11166 | ||
5f5c8ee5 GM |
11167 | |
11168 | /* Redisplay, but leave alone any recent echo area message unless | |
11169 | another message has been requested in its place. | |
a2889657 JB |
11170 | |
11171 | This is useful in situations where you need to redisplay but no | |
11172 | user action has occurred, making it inappropriate for the message | |
11173 | area to be cleared. See tracking_off and | |
d64b707c | 11174 | wait_reading_process_output for examples of these situations. |
9bf76936 GM |
11175 | |
11176 | FROM_WHERE is an integer saying from where this function was | |
11177 | called. This is useful for debugging. */ | |
a2889657 | 11178 | |
8991bb31 | 11179 | void |
9bf76936 GM |
11180 | redisplay_preserve_echo_area (from_where) |
11181 | int from_where; | |
a2889657 | 11182 | { |
9bf76936 GM |
11183 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
11184 | ||
c6e89d6c | 11185 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 11186 | { |
c6e89d6c GM |
11187 | /* We have a previously displayed message, but no current |
11188 | message. Redisplay the previous message. */ | |
11189 | display_last_displayed_message_p = 1; | |
e9874cee | 11190 | redisplay_internal (1); |
c6e89d6c | 11191 | display_last_displayed_message_p = 0; |
a2889657 JB |
11192 | } |
11193 | else | |
e9874cee | 11194 | redisplay_internal (1); |
16fe48b4 | 11195 | |
777f4146 | 11196 | if (rif != NULL && rif->flush_display_optional) |
16fe48b4 | 11197 | rif->flush_display_optional (NULL); |
a2889657 JB |
11198 | } |
11199 | ||
5f5c8ee5 | 11200 | |
28514cd9 | 11201 | /* Function registered with record_unwind_protect in |
acfca545 RS |
11202 | redisplay_internal. Reset redisplaying_p to the value it had |
11203 | before redisplay_internal was called, and clear | |
dd429b03 KH |
11204 | prevent_freeing_realized_faces_p. It also selects the previously |
11205 | selected frame. */ | |
28514cd9 GM |
11206 | |
11207 | static Lisp_Object | |
dd429b03 KH |
11208 | unwind_redisplay (val) |
11209 | Lisp_Object val; | |
28514cd9 | 11210 | { |
dd429b03 KH |
11211 | Lisp_Object old_redisplaying_p, old_frame; |
11212 | ||
11213 | old_redisplaying_p = XCAR (val); | |
28514cd9 | 11214 | redisplaying_p = XFASTINT (old_redisplaying_p); |
dd429b03 KH |
11215 | old_frame = XCDR (val); |
11216 | if (! EQ (old_frame, selected_frame)) | |
11217 | select_frame_for_redisplay (old_frame); | |
c6e89d6c | 11218 | return Qnil; |
28514cd9 GM |
11219 | } |
11220 | ||
11221 | ||
43c09969 GM |
11222 | /* Mark the display of window W as accurate or inaccurate. If |
11223 | ACCURATE_P is non-zero mark display of W as accurate. If | |
11224 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
11225 | redisplay_internal is called. */ | |
5f5c8ee5 | 11226 | |
43c09969 GM |
11227 | static void |
11228 | mark_window_display_accurate_1 (w, accurate_p) | |
11229 | struct window *w; | |
5f5c8ee5 | 11230 | int accurate_p; |
a2889657 | 11231 | { |
43c09969 | 11232 | if (BUFFERP (w->buffer)) |
a2889657 | 11233 | { |
43c09969 | 11234 | struct buffer *b = XBUFFER (w->buffer); |
2311178e | 11235 | |
43c09969 GM |
11236 | w->last_modified |
11237 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
11238 | w->last_overlay_modified | |
11239 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
11240 | w->last_had_star | |
11241 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 11242 | |
43c09969 | 11243 | if (accurate_p) |
bd66d1ba | 11244 | { |
43c09969 GM |
11245 | b->clip_changed = 0; |
11246 | b->prevent_redisplay_optimizations_p = 0; | |
11247 | ||
11248 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
11249 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
11250 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
11251 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
2311178e | 11252 | |
43c09969 GM |
11253 | w->current_matrix->buffer = b; |
11254 | w->current_matrix->begv = BUF_BEGV (b); | |
11255 | w->current_matrix->zv = BUF_ZV (b); | |
2311178e | 11256 | |
43c09969 GM |
11257 | w->last_cursor = w->cursor; |
11258 | w->last_cursor_off_p = w->cursor_off_p; | |
2311178e | 11259 | |
43c09969 GM |
11260 | if (w == XWINDOW (selected_window)) |
11261 | w->last_point = make_number (BUF_PT (b)); | |
11262 | else | |
11263 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 11264 | } |
43c09969 | 11265 | } |
bd66d1ba | 11266 | |
43c09969 GM |
11267 | if (accurate_p) |
11268 | { | |
d2f84654 | 11269 | w->window_end_valid = w->buffer; |
99332eb6 | 11270 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 | 11271 | xassert (XINT (w->window_end_vpos) |
da8b7f4f | 11272 | < (WINDOW_TOTAL_LINES (w) |
2913a9c0 | 11273 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); |
99332eb6 | 11274 | #endif |
a2889657 | 11275 | w->update_mode_line = Qnil; |
43c09969 GM |
11276 | } |
11277 | } | |
11278 | ||
11279 | ||
11280 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
11281 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
11282 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
11283 | be redisplayed the next time redisplay_internal is called. */ | |
11284 | ||
11285 | void | |
11286 | mark_window_display_accurate (window, accurate_p) | |
11287 | Lisp_Object window; | |
11288 | int accurate_p; | |
11289 | { | |
11290 | struct window *w; | |
2311178e | 11291 | |
43c09969 GM |
11292 | for (; !NILP (window); window = w->next) |
11293 | { | |
11294 | w = XWINDOW (window); | |
11295 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 11296 | |
265a9e55 | 11297 | if (!NILP (w->vchild)) |
5f5c8ee5 | 11298 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 11299 | if (!NILP (w->hchild)) |
5f5c8ee5 | 11300 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
11301 | } |
11302 | ||
5f5c8ee5 | 11303 | if (accurate_p) |
a2889657 | 11304 | { |
351b5434 | 11305 | update_overlay_arrows (1); |
a2889657 JB |
11306 | } |
11307 | else | |
11308 | { | |
5f5c8ee5 GM |
11309 | /* Force a thorough redisplay the next time by setting |
11310 | last_arrow_position and last_arrow_string to t, which is | |
4b41cebb | 11311 | unequal to any useful value of Voverlay_arrow_... */ |
351b5434 | 11312 | update_overlay_arrows (-1); |
a2889657 JB |
11313 | } |
11314 | } | |
5f5c8ee5 GM |
11315 | |
11316 | ||
11317 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
11318 | C. Since a display table doesn't have any parent, we don't have to | |
11319 | follow parent. Do not call this function directly but use the | |
11320 | macro DISP_CHAR_VECTOR. */ | |
11321 | ||
11322 | Lisp_Object | |
11323 | disp_char_vector (dp, c) | |
11324 | struct Lisp_Char_Table *dp; | |
11325 | int c; | |
11326 | { | |
11327 | int code[4], i; | |
11328 | Lisp_Object val; | |
11329 | ||
11330 | if (SINGLE_BYTE_CHAR_P (c)) | |
11331 | return (dp->contents[c]); | |
2311178e | 11332 | |
c5924f47 | 11333 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
11334 | if (code[1] < 32) |
11335 | code[1] = -1; | |
11336 | else if (code[2] < 32) | |
11337 | code[2] = -1; | |
2311178e | 11338 | |
5f5c8ee5 GM |
11339 | /* Here, the possible range of code[0] (== charset ID) is |
11340 | 128..max_charset. Since the top level char table contains data | |
11341 | for multibyte characters after 256th element, we must increment | |
11342 | code[0] by 128 to get a correct index. */ | |
11343 | code[0] += 128; | |
11344 | code[3] = -1; /* anchor */ | |
11345 | ||
11346 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
11347 | { | |
11348 | val = dp->contents[code[i]]; | |
11349 | if (!SUB_CHAR_TABLE_P (val)) | |
11350 | return (NILP (val) ? dp->defalt : val); | |
11351 | } | |
2311178e | 11352 | |
5f5c8ee5 GM |
11353 | /* Here, val is a sub char table. We return the default value of |
11354 | it. */ | |
11355 | return (dp->defalt); | |
11356 | } | |
11357 | ||
11358 | ||
a2889657 | 11359 | \f |
5f5c8ee5 GM |
11360 | /*********************************************************************** |
11361 | Window Redisplay | |
11362 | ***********************************************************************/ | |
a2725ab2 | 11363 | |
5f5c8ee5 | 11364 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
11365 | |
11366 | static void | |
5f5c8ee5 GM |
11367 | redisplay_windows (window) |
11368 | Lisp_Object window; | |
90adcf20 | 11369 | { |
5f5c8ee5 GM |
11370 | while (!NILP (window)) |
11371 | { | |
11372 | struct window *w = XWINDOW (window); | |
2311178e | 11373 | |
5f5c8ee5 GM |
11374 | if (!NILP (w->hchild)) |
11375 | redisplay_windows (w->hchild); | |
11376 | else if (!NILP (w->vchild)) | |
11377 | redisplay_windows (w->vchild); | |
11378 | else | |
82a7ab23 RS |
11379 | { |
11380 | displayed_buffer = XBUFFER (w->buffer); | |
7033d6df RS |
11381 | /* Use list_of_error, not Qerror, so that |
11382 | we catch only errors and don't run the debugger. */ | |
2311178e | 11383 | internal_condition_case_1 (redisplay_window_0, window, |
7033d6df | 11384 | list_of_error, |
82a7ab23 RS |
11385 | redisplay_window_error); |
11386 | } | |
a2725ab2 | 11387 | |
5f5c8ee5 GM |
11388 | window = w->next; |
11389 | } | |
11390 | } | |
11391 | ||
82a7ab23 RS |
11392 | static Lisp_Object |
11393 | redisplay_window_error () | |
11394 | { | |
11395 | displayed_buffer->display_error_modiff = BUF_MODIFF (displayed_buffer); | |
11396 | return Qnil; | |
11397 | } | |
11398 | ||
11399 | static Lisp_Object | |
11400 | redisplay_window_0 (window) | |
11401 | Lisp_Object window; | |
11402 | { | |
11403 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
11404 | redisplay_window (window, 0); | |
11405 | return Qnil; | |
11406 | } | |
5f5c8ee5 | 11407 | |
82a7ab23 RS |
11408 | static Lisp_Object |
11409 | redisplay_window_1 (window) | |
11410 | Lisp_Object window; | |
11411 | { | |
11412 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
11413 | redisplay_window (window, 1); | |
11414 | return Qnil; | |
11415 | } | |
11416 | \f | |
bc6371a6 KH |
11417 | |
11418 | /* Increment GLYPH until it reaches END or CONDITION fails while | |
11419 | adding (GLYPH)->pixel_width to X. */ | |
11420 | ||
11421 | #define SKIP_GLYPHS(glyph, end, x, condition) \ | |
11422 | do \ | |
11423 | { \ | |
11424 | (x) += (glyph)->pixel_width; \ | |
11425 | ++(glyph); \ | |
11426 | } \ | |
11427 | while ((glyph) < (end) && (condition)) | |
11428 | ||
11429 | ||
5f5c8ee5 GM |
11430 | /* Set cursor position of W. PT is assumed to be displayed in ROW. |
11431 | DELTA is the number of bytes by which positions recorded in ROW | |
11432 | differ from current buffer positions. */ | |
11433 | ||
11434 | void | |
11435 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
11436 | struct window *w; | |
11437 | struct glyph_row *row; | |
11438 | struct glyph_matrix *matrix; | |
11439 | int delta, delta_bytes, dy, dvpos; | |
11440 | { | |
11441 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
11442 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
cc2734ee | 11443 | struct glyph *cursor = NULL; |
ae73dc1c KH |
11444 | /* The first glyph that starts a sequence of glyphs from string. */ |
11445 | struct glyph *string_start; | |
11446 | /* The X coordinate of string_start. */ | |
11447 | int string_start_x; | |
11448 | /* The last known character position. */ | |
11449 | int last_pos = MATRIX_ROW_START_CHARPOS (row) + delta; | |
11450 | /* The last known character position before string_start. */ | |
11451 | int string_before_pos; | |
5f5c8ee5 | 11452 | int x = row->x; |
cc2734ee | 11453 | int cursor_x = x; |
a01c5155 | 11454 | int cursor_from_overlay_pos = 0; |
5f5c8ee5 GM |
11455 | int pt_old = PT - delta; |
11456 | ||
11457 | /* Skip over glyphs not having an object at the start of the row. | |
11458 | These are special glyphs like truncation marks on terminal | |
11459 | frames. */ | |
11460 | if (row->displays_text_p) | |
11461 | while (glyph < end | |
6fc556fd | 11462 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
11463 | && glyph->charpos < 0) |
11464 | { | |
11465 | x += glyph->pixel_width; | |
11466 | ++glyph; | |
11467 | } | |
11468 | ||
ae73dc1c | 11469 | string_start = NULL; |
5f5c8ee5 | 11470 | while (glyph < end |
6fc556fd | 11471 | && !INTEGERP (glyph->object) |
5f5c8ee5 | 11472 | && (!BUFFERP (glyph->object) |
ae73dc1c | 11473 | || (last_pos = glyph->charpos) < pt_old)) |
5f5c8ee5 | 11474 | { |
ae73dc1c KH |
11475 | if (! STRINGP (glyph->object)) |
11476 | { | |
11477 | string_start = NULL; | |
11478 | x += glyph->pixel_width; | |
11479 | ++glyph; | |
a01c5155 KS |
11480 | if (cursor_from_overlay_pos |
11481 | && last_pos > cursor_from_overlay_pos) | |
11482 | { | |
11483 | cursor_from_overlay_pos = 0; | |
11484 | cursor = 0; | |
11485 | } | |
ae73dc1c KH |
11486 | } |
11487 | else | |
11488 | { | |
11489 | string_before_pos = last_pos; | |
11490 | string_start = glyph; | |
11491 | string_start_x = x; | |
11492 | /* Skip all glyphs from string. */ | |
cc2734ee KS |
11493 | do |
11494 | { | |
a01c5155 | 11495 | int pos; |
cc2734ee KS |
11496 | if ((cursor == NULL || glyph > cursor) |
11497 | && !NILP (Fget_char_property (make_number ((glyph)->charpos), | |
a01c5155 KS |
11498 | Qcursor, (glyph)->object)) |
11499 | && (pos = string_buffer_position (w, glyph->object, | |
11500 | string_before_pos), | |
11501 | (pos == 0 /* From overlay */ | |
11502 | || pos == pt_old))) | |
cc2734ee | 11503 | { |
bc9447bc KS |
11504 | /* Estimate overlay buffer position from the buffer |
11505 | positions of the glyphs before and after the overlay. | |
11506 | Add 1 to last_pos so that if point corresponds to the | |
11507 | glyph right after the overlay, we still use a 'cursor' | |
11508 | property found in that overlay. */ | |
11509 | cursor_from_overlay_pos = pos == 0 ? last_pos+1 : 0; | |
cc2734ee KS |
11510 | cursor = glyph; |
11511 | cursor_x = x; | |
11512 | } | |
11513 | x += glyph->pixel_width; | |
11514 | ++glyph; | |
11515 | } | |
11516 | while (glyph < end && STRINGP (glyph->object)); | |
ae73dc1c KH |
11517 | } |
11518 | } | |
11519 | ||
cc2734ee KS |
11520 | if (cursor != NULL) |
11521 | { | |
11522 | glyph = cursor; | |
11523 | x = cursor_x; | |
11524 | } | |
f323e507 RS |
11525 | else if (row->ends_in_ellipsis_p && glyph == end) |
11526 | { | |
11527 | /* Scan back over the ellipsis glyphs, decrementing positions. */ | |
11528 | while (glyph > row->glyphs[TEXT_AREA] | |
11529 | && (glyph - 1)->charpos == last_pos) | |
11530 | glyph--, x -= glyph->pixel_width; | |
11531 | /* That loop always goes one position too far, | |
11532 | including the glyph before the ellipsis. | |
11533 | So scan forward over that one. */ | |
11534 | x += glyph->pixel_width; | |
11535 | glyph++; | |
11536 | } | |
cc2734ee KS |
11537 | else if (string_start |
11538 | && (glyph == end || !BUFFERP (glyph->object) || last_pos > pt_old)) | |
ae73dc1c KH |
11539 | { |
11540 | /* We may have skipped over point because the previous glyphs | |
11541 | are from string. As there's no easy way to know the | |
11542 | character position of the current glyph, find the correct | |
11543 | glyph on point by scanning from string_start again. */ | |
bc6371a6 KH |
11544 | Lisp_Object limit; |
11545 | Lisp_Object string; | |
11546 | int pos; | |
ae73dc1c | 11547 | |
bc6371a6 KH |
11548 | limit = make_number (pt_old + 1); |
11549 | end = glyph; | |
ae73dc1c KH |
11550 | glyph = string_start; |
11551 | x = string_start_x; | |
bc6371a6 KH |
11552 | string = glyph->object; |
11553 | pos = string_buffer_position (w, string, string_before_pos); | |
11554 | /* If STRING is from overlay, LAST_POS == 0. We skip such glyphs | |
11555 | because we always put cursor after overlay strings. */ | |
11556 | while (pos == 0 && glyph < end) | |
ae73dc1c | 11557 | { |
bc6371a6 KH |
11558 | string = glyph->object; |
11559 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
11560 | if (glyph < end) | |
11561 | pos = string_buffer_position (w, glyph->object, string_before_pos); | |
11562 | } | |
11563 | ||
11564 | while (glyph < end) | |
11565 | { | |
11566 | pos = XINT (Fnext_single_char_property_change | |
11567 | (make_number (pos), Qdisplay, Qnil, limit)); | |
11568 | if (pos > pt_old) | |
11569 | break; | |
ae73dc1c | 11570 | /* Skip glyphs from the same string. */ |
bc6371a6 KH |
11571 | string = glyph->object; |
11572 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
11573 | /* Skip glyphs from an overlay. */ | |
11574 | while (glyph < end | |
11575 | && ! string_buffer_position (w, glyph->object, pos)) | |
ae73dc1c | 11576 | { |
bc6371a6 KH |
11577 | string = glyph->object; |
11578 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
ae73dc1c | 11579 | } |
ae73dc1c | 11580 | } |
5f5c8ee5 GM |
11581 | } |
11582 | ||
11583 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
11584 | w->cursor.x = x; | |
11585 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
11586 | w->cursor.y = row->y + dy; | |
11587 | ||
11588 | if (w == XWINDOW (selected_window)) | |
11589 | { | |
11590 | if (!row->continued_p | |
11591 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
11592 | && row->x == 0) | |
11593 | { | |
11594 | this_line_buffer = XBUFFER (w->buffer); | |
2311178e | 11595 | |
5f5c8ee5 GM |
11596 | CHARPOS (this_line_start_pos) |
11597 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
11598 | BYTEPOS (this_line_start_pos) | |
11599 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
2311178e | 11600 | |
5f5c8ee5 GM |
11601 | CHARPOS (this_line_end_pos) |
11602 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
11603 | BYTEPOS (this_line_end_pos) | |
11604 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
2311178e | 11605 | |
5f5c8ee5 GM |
11606 | this_line_y = w->cursor.y; |
11607 | this_line_pixel_height = row->height; | |
11608 | this_line_vpos = w->cursor.vpos; | |
11609 | this_line_start_x = row->x; | |
11610 | } | |
11611 | else | |
11612 | CHARPOS (this_line_start_pos) = 0; | |
11613 | } | |
11614 | } | |
11615 | ||
11616 | ||
11617 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
11618 | start STARTP. Sets the window start of WINDOW to that position. |
11619 | ||
11620 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
11621 | |
11622 | static INLINE struct text_pos | |
11623 | run_window_scroll_functions (window, startp) | |
11624 | Lisp_Object window; | |
11625 | struct text_pos startp; | |
11626 | { | |
11627 | struct window *w = XWINDOW (window); | |
11628 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
11629 | |
11630 | if (current_buffer != XBUFFER (w->buffer)) | |
11631 | abort (); | |
11632 | ||
5f5c8ee5 GM |
11633 | if (!NILP (Vwindow_scroll_functions)) |
11634 | { | |
2311178e | 11635 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
5f5c8ee5 GM |
11636 | make_number (CHARPOS (startp))); |
11637 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
11638 | /* In case the hook functions switch buffers. */ |
11639 | if (current_buffer != XBUFFER (w->buffer)) | |
11640 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 11641 | } |
90adcf20 | 11642 | |
5f5c8ee5 GM |
11643 | return startp; |
11644 | } | |
11645 | ||
11646 | ||
ddf6b9a3 RS |
11647 | /* Make sure the line containing the cursor is fully visible. |
11648 | A value of 1 means there is nothing to be done. | |
11649 | (Either the line is fully visible, or it cannot be made so, | |
11650 | or we cannot tell.) | |
cb9d4a9f KS |
11651 | |
11652 | If FORCE_P is non-zero, return 0 even if partial visible cursor row | |
11653 | is higher than window. | |
11654 | ||
ddf6b9a3 RS |
11655 | A value of 0 means the caller should do scrolling |
11656 | as if point had gone off the screen. */ | |
5f5c8ee5 | 11657 | |
cb617e7c | 11658 | static int |
e10ee30c | 11659 | cursor_row_fully_visible_p (w, force_p, current_matrix_p) |
5f5c8ee5 | 11660 | struct window *w; |
cb9d4a9f | 11661 | int force_p; |
43f15d4a | 11662 | int current_matrix_p; |
5f5c8ee5 GM |
11663 | { |
11664 | struct glyph_matrix *matrix; | |
11665 | struct glyph_row *row; | |
478d746b | 11666 | int window_height; |
2311178e | 11667 | |
8232c913 KS |
11668 | if (!make_cursor_line_fully_visible_p) |
11669 | return 1; | |
11670 | ||
5f5c8ee5 GM |
11671 | /* It's not always possible to find the cursor, e.g, when a window |
11672 | is full of overlay strings. Don't do anything in that case. */ | |
11673 | if (w->cursor.vpos < 0) | |
cb617e7c | 11674 | return 1; |
2311178e | 11675 | |
e10ee30c | 11676 | matrix = current_matrix_p ? w->current_matrix : w->desired_matrix; |
5f5c8ee5 GM |
11677 | row = MATRIX_ROW (matrix, w->cursor.vpos); |
11678 | ||
acda20e1 | 11679 | /* If the cursor row is not partially visible, there's nothing to do. */ |
546f98b8 | 11680 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (w, row)) |
cb617e7c | 11681 | return 1; |
b28cb6ed GM |
11682 | |
11683 | /* If the row the cursor is in is taller than the window's height, | |
11684 | it's not clear what to do, so do nothing. */ | |
11685 | window_height = window_box_height (w); | |
11686 | if (row->height >= window_height) | |
e893970b | 11687 | { |
e3ea3a51 | 11688 | if (!force_p || MINI_WINDOW_P (w) || w->vscroll) |
e893970b KS |
11689 | return 1; |
11690 | } | |
ddf6b9a3 RS |
11691 | return 0; |
11692 | ||
11693 | #if 0 | |
11694 | /* This code used to try to scroll the window just enough to make | |
11695 | the line visible. It returned 0 to say that the caller should | |
11696 | allocate larger glyph matrices. */ | |
11697 | ||
b28cb6ed | 11698 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) |
5f5c8ee5 GM |
11699 | { |
11700 | int dy = row->height - row->visible_height; | |
11701 | w->vscroll = 0; | |
11702 | w->cursor.y += dy; | |
11703 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
11704 | } | |
b28cb6ed | 11705 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
11706 | { |
11707 | int dy = - (row->height - row->visible_height); | |
11708 | w->vscroll = dy; | |
11709 | w->cursor.y += dy; | |
11710 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
11711 | } | |
2311178e | 11712 | |
5f5c8ee5 GM |
11713 | /* When we change the cursor y-position of the selected window, |
11714 | change this_line_y as well so that the display optimization for | |
11715 | the cursor line of the selected window in redisplay_internal uses | |
11716 | the correct y-position. */ | |
11717 | if (w == XWINDOW (selected_window)) | |
11718 | this_line_y = w->cursor.y; | |
cb617e7c GM |
11719 | |
11720 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
11721 | redisplay with larger matrices. */ | |
11722 | if (matrix->nrows < required_matrix_height (w)) | |
11723 | { | |
11724 | fonts_changed_p = 1; | |
11725 | return 0; | |
11726 | } | |
11727 | ||
11728 | return 1; | |
ddf6b9a3 | 11729 | #endif /* 0 */ |
5f5c8ee5 GM |
11730 | } |
11731 | ||
11732 | ||
11733 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
11734 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
11735 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
11736 | in redisplay_window to bring a partially visible line into view in | |
11737 | the case that only the cursor has moved. | |
11738 | ||
03b0a4b4 RS |
11739 | LAST_LINE_MISFIT should be nonzero if we're scrolling because the |
11740 | last screen line's vertical height extends past the end of the screen. | |
11741 | ||
5f5c8ee5 GM |
11742 | Value is |
11743 | ||
11744 | 1 if scrolling succeeded | |
2311178e | 11745 | |
5f5c8ee5 | 11746 | 0 if scrolling didn't find point. |
2311178e | 11747 | |
5f5c8ee5 GM |
11748 | -1 if new fonts have been loaded so that we must interrupt |
11749 | redisplay, adjust glyph matrices, and try again. */ | |
11750 | ||
cb617e7c GM |
11751 | enum |
11752 | { | |
11753 | SCROLLING_SUCCESS, | |
11754 | SCROLLING_FAILED, | |
11755 | SCROLLING_NEED_LARGER_MATRICES | |
11756 | }; | |
11757 | ||
5f5c8ee5 GM |
11758 | static int |
11759 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
03b0a4b4 | 11760 | scroll_step, temp_scroll_step, last_line_misfit) |
5f5c8ee5 GM |
11761 | Lisp_Object window; |
11762 | int just_this_one_p; | |
31ade731 | 11763 | EMACS_INT scroll_conservatively, scroll_step; |
5f5c8ee5 | 11764 | int temp_scroll_step; |
03b0a4b4 | 11765 | int last_line_misfit; |
5f5c8ee5 GM |
11766 | { |
11767 | struct window *w = XWINDOW (window); | |
11768 | struct frame *f = XFRAME (w->frame); | |
11769 | struct text_pos scroll_margin_pos; | |
11770 | struct text_pos pos; | |
11771 | struct text_pos startp; | |
11772 | struct it it; | |
11773 | Lisp_Object window_end; | |
11774 | int this_scroll_margin; | |
11775 | int dy = 0; | |
11776 | int scroll_max; | |
b8a63ccb | 11777 | int rc; |
5f5c8ee5 GM |
11778 | int amount_to_scroll = 0; |
11779 | Lisp_Object aggressive; | |
11780 | int height; | |
cb9d4a9f | 11781 | int extra_scroll_margin_lines = last_line_misfit ? 1 : 0; |
5f5c8ee5 GM |
11782 | |
11783 | #if GLYPH_DEBUG | |
11784 | debug_method_add (w, "try_scrolling"); | |
78614721 | 11785 | #endif |
5f5c8ee5 GM |
11786 | |
11787 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
2311178e | 11788 | |
5f5c8ee5 GM |
11789 | /* Compute scroll margin height in pixels. We scroll when point is |
11790 | within this distance from the top or bottom of the window. */ | |
11791 | if (scroll_margin > 0) | |
90adcf20 | 11792 | { |
da8b7f4f KS |
11793 | this_scroll_margin = min (scroll_margin, WINDOW_TOTAL_LINES (w) / 4); |
11794 | this_scroll_margin *= FRAME_LINE_HEIGHT (f); | |
5f5c8ee5 GM |
11795 | } |
11796 | else | |
11797 | this_scroll_margin = 0; | |
11798 | ||
75c5501b JB |
11799 | /* Force scroll_conservatively to have a reasonable value so it doesn't |
11800 | cause an overflow while computing how much to scroll. */ | |
11801 | if (scroll_conservatively) | |
11802 | scroll_conservatively = min (scroll_conservatively, | |
11803 | MOST_POSITIVE_FIXNUM / FRAME_LINE_HEIGHT (f)); | |
11804 | ||
5f5c8ee5 GM |
11805 | /* Compute how much we should try to scroll maximally to bring point |
11806 | into view. */ | |
0894e696 SM |
11807 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
11808 | scroll_max = max (scroll_step, | |
11809 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
11810 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
11811 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
11812 | /* We're trying to scroll because of aggressive scrolling | |
11813 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
11814 | there should be a variable for this. */ | |
11815 | scroll_max = 10; | |
11816 | else | |
11817 | scroll_max = 0; | |
da8b7f4f | 11818 | scroll_max *= FRAME_LINE_HEIGHT (f); |
5f5c8ee5 GM |
11819 | |
11820 | /* Decide whether we have to scroll down. Start at the window end | |
11821 | and move this_scroll_margin up to find the position of the scroll | |
11822 | margin. */ | |
11823 | window_end = Fwindow_end (window, Qt); | |
03b0a4b4 RS |
11824 | |
11825 | too_near_end: | |
11826 | ||
5f5c8ee5 GM |
11827 | CHARPOS (scroll_margin_pos) = XINT (window_end); |
11828 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
03b0a4b4 | 11829 | |
cb9d4a9f | 11830 | if (this_scroll_margin || extra_scroll_margin_lines) |
5f5c8ee5 GM |
11831 | { |
11832 | start_display (&it, w, scroll_margin_pos); | |
cb9d4a9f | 11833 | if (this_scroll_margin) |
546f98b8 | 11834 | move_it_vertically_backward (&it, this_scroll_margin); |
cb9d4a9f KS |
11835 | if (extra_scroll_margin_lines) |
11836 | move_it_by_lines (&it, - extra_scroll_margin_lines, 0); | |
5f5c8ee5 GM |
11837 | scroll_margin_pos = it.current.pos; |
11838 | } | |
11839 | ||
11840 | if (PT >= CHARPOS (scroll_margin_pos)) | |
11841 | { | |
11842 | int y0; | |
2311178e | 11843 | |
5f5c8ee5 GM |
11844 | /* Point is in the scroll margin at the bottom of the window, or |
11845 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 11846 | |
5f5c8ee5 GM |
11847 | /* Compute the distance from the scroll margin to PT. |
11848 | Give up if the distance is greater than scroll_max. */ | |
11849 | start_display (&it, w, scroll_margin_pos); | |
11850 | y0 = it.current_y; | |
11851 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
11852 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
539e92ad GM |
11853 | |
11854 | /* To make point visible, we have to move the window start | |
11855 | down so that the line the cursor is in is visible, which | |
11856 | means we have to add in the height of the cursor line. */ | |
11857 | dy = line_bottom_y (&it) - y0; | |
2311178e | 11858 | |
5f5c8ee5 | 11859 | if (dy > scroll_max) |
cb617e7c | 11860 | return SCROLLING_FAILED; |
2311178e | 11861 | |
5f5c8ee5 GM |
11862 | /* Move the window start down. If scrolling conservatively, |
11863 | move it just enough down to make point visible. If | |
11864 | scroll_step is set, move it down by scroll_step. */ | |
11865 | start_display (&it, w, startp); | |
11866 | ||
11867 | if (scroll_conservatively) | |
03b0a4b4 RS |
11868 | /* Set AMOUNT_TO_SCROLL to at least one line, |
11869 | and at most scroll_conservatively lines. */ | |
e89aaabd | 11870 | amount_to_scroll |
da8b7f4f KS |
11871 | = min (max (dy, FRAME_LINE_HEIGHT (f)), |
11872 | FRAME_LINE_HEIGHT (f) * scroll_conservatively); | |
5f5c8ee5 GM |
11873 | else if (scroll_step || temp_scroll_step) |
11874 | amount_to_scroll = scroll_max; | |
11875 | else | |
90adcf20 | 11876 | { |
46226c1d | 11877 | aggressive = current_buffer->scroll_up_aggressively; |
da8b7f4f | 11878 | height = WINDOW_BOX_TEXT_HEIGHT (w); |
5f5c8ee5 | 11879 | if (NUMBERP (aggressive)) |
6924d3b7 RS |
11880 | { |
11881 | double float_amount = XFLOATINT (aggressive) * height; | |
11882 | amount_to_scroll = float_amount; | |
11883 | if (amount_to_scroll == 0 && float_amount > 0) | |
11884 | amount_to_scroll = 1; | |
11885 | } | |
5f5c8ee5 | 11886 | } |
a2725ab2 | 11887 | |
5f5c8ee5 | 11888 | if (amount_to_scroll <= 0) |
cb617e7c | 11889 | return SCROLLING_FAILED; |
a2725ab2 | 11890 | |
03b0a4b4 RS |
11891 | /* If moving by amount_to_scroll leaves STARTP unchanged, |
11892 | move it down one screen line. */ | |
11893 | ||
5f5c8ee5 | 11894 | move_it_vertically (&it, amount_to_scroll); |
03b0a4b4 RS |
11895 | if (CHARPOS (it.current.pos) == CHARPOS (startp)) |
11896 | move_it_by_lines (&it, 1, 1); | |
5f5c8ee5 GM |
11897 | startp = it.current.pos; |
11898 | } | |
11899 | else | |
11900 | { | |
11901 | /* See if point is inside the scroll margin at the top of the | |
11902 | window. */ | |
11903 | scroll_margin_pos = startp; | |
11904 | if (this_scroll_margin) | |
11905 | { | |
11906 | start_display (&it, w, startp); | |
11907 | move_it_vertically (&it, this_scroll_margin); | |
11908 | scroll_margin_pos = it.current.pos; | |
11909 | } | |
11910 | ||
11911 | if (PT < CHARPOS (scroll_margin_pos)) | |
11912 | { | |
11913 | /* Point is in the scroll margin at the top of the window or | |
11914 | above what is displayed in the window. */ | |
11915 | int y0; | |
2311178e | 11916 | |
5f5c8ee5 GM |
11917 | /* Compute the vertical distance from PT to the scroll |
11918 | margin position. Give up if distance is greater than | |
11919 | scroll_max. */ | |
11920 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
11921 | start_display (&it, w, pos); | |
11922 | y0 = it.current_y; | |
11923 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
11924 | it.last_visible_y, -1, | |
11925 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
11926 | dy = it.current_y - y0; | |
11927 | if (dy > scroll_max) | |
cb617e7c | 11928 | return SCROLLING_FAILED; |
2311178e | 11929 | |
5f5c8ee5 GM |
11930 | /* Compute new window start. */ |
11931 | start_display (&it, w, startp); | |
2311178e | 11932 | |
5f5c8ee5 | 11933 | if (scroll_conservatively) |
70567d1c RS |
11934 | amount_to_scroll |
11935 | = max (dy, FRAME_LINE_HEIGHT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
11936 | else if (scroll_step || temp_scroll_step) |
11937 | amount_to_scroll = scroll_max; | |
538f13d4 | 11938 | else |
5f5c8ee5 | 11939 | { |
46226c1d | 11940 | aggressive = current_buffer->scroll_down_aggressively; |
da8b7f4f | 11941 | height = WINDOW_BOX_TEXT_HEIGHT (w); |
5f5c8ee5 | 11942 | if (NUMBERP (aggressive)) |
6924d3b7 RS |
11943 | { |
11944 | double float_amount = XFLOATINT (aggressive) * height; | |
11945 | amount_to_scroll = float_amount; | |
11946 | if (amount_to_scroll == 0 && float_amount > 0) | |
11947 | amount_to_scroll = 1; | |
11948 | } | |
5f5c8ee5 | 11949 | } |
a2725ab2 | 11950 | |
5f5c8ee5 | 11951 | if (amount_to_scroll <= 0) |
cb617e7c | 11952 | return SCROLLING_FAILED; |
2311178e | 11953 | |
546f98b8 | 11954 | move_it_vertically_backward (&it, amount_to_scroll); |
5f5c8ee5 | 11955 | startp = it.current.pos; |
90adcf20 RS |
11956 | } |
11957 | } | |
a2889657 | 11958 | |
5f5c8ee5 GM |
11959 | /* Run window scroll functions. */ |
11960 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 11961 | |
5f5c8ee5 GM |
11962 | /* Display the window. Give up if new fonts are loaded, or if point |
11963 | doesn't appear. */ | |
493c1d49 | 11964 | if (!try_window (window, startp, 0)) |
cb617e7c | 11965 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
11966 | else if (w->cursor.vpos < 0) |
11967 | { | |
11968 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 11969 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
11970 | } |
11971 | else | |
11972 | { | |
11973 | /* Maybe forget recorded base line for line number display. */ | |
2311178e | 11974 | if (!just_this_one_p |
5f5c8ee5 | 11975 | || current_buffer->clip_changed |
9142dd5b | 11976 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 | 11977 | w->base_line_number = Qnil; |
2311178e | 11978 | |
ddf6b9a3 RS |
11979 | /* If cursor ends up on a partially visible line, |
11980 | treat that as being off the bottom of the screen. */ | |
e10ee30c | 11981 | if (! cursor_row_fully_visible_p (w, extra_scroll_margin_lines <= 1, 0)) |
ef3c2c73 RS |
11982 | { |
11983 | clear_glyph_matrix (w->desired_matrix); | |
cb9d4a9f | 11984 | ++extra_scroll_margin_lines; |
ef3c2c73 RS |
11985 | goto too_near_end; |
11986 | } | |
ddf6b9a3 | 11987 | rc = SCROLLING_SUCCESS; |
5f5c8ee5 GM |
11988 | } |
11989 | ||
11990 | return rc; | |
a2889657 JB |
11991 | } |
11992 | ||
5f5c8ee5 GM |
11993 | |
11994 | /* Compute a suitable window start for window W if display of W starts | |
11995 | on a continuation line. Value is non-zero if a new window start | |
11996 | was computed. | |
11997 | ||
11998 | The new window start will be computed, based on W's width, starting | |
11999 | from the start of the continued line. It is the start of the | |
12000 | screen line with the minimum distance from the old start W->start. */ | |
12001 | ||
12002 | static int | |
12003 | compute_window_start_on_continuation_line (w) | |
12004 | struct window *w; | |
1f1ff51d | 12005 | { |
5f5c8ee5 GM |
12006 | struct text_pos pos, start_pos; |
12007 | int window_start_changed_p = 0; | |
1f1ff51d | 12008 | |
5f5c8ee5 | 12009 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 12010 | |
5f5c8ee5 | 12011 | /* If window start is on a continuation line... Window start may be |
2311178e | 12012 | < BEGV in case there's invisible text at the start of the |
5f5c8ee5 GM |
12013 | buffer (M-x rmail, for example). */ |
12014 | if (CHARPOS (start_pos) > BEGV | |
12015 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 12016 | { |
5f5c8ee5 GM |
12017 | struct it it; |
12018 | struct glyph_row *row; | |
f3751a65 GM |
12019 | |
12020 | /* Handle the case that the window start is out of range. */ | |
12021 | if (CHARPOS (start_pos) < BEGV) | |
12022 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
12023 | else if (CHARPOS (start_pos) > ZV) | |
12024 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
2311178e | 12025 | |
5f5c8ee5 GM |
12026 | /* Find the start of the continued line. This should be fast |
12027 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 12028 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
12029 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
12030 | row, DEFAULT_FACE_ID); | |
12031 | reseat_at_previous_visible_line_start (&it); | |
12032 | ||
12033 | /* If the line start is "too far" away from the window start, | |
12034 | say it takes too much time to compute a new window start. */ | |
12035 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
da8b7f4f | 12036 | < WINDOW_TOTAL_LINES (w) * WINDOW_TOTAL_COLS (w)) |
5f5c8ee5 GM |
12037 | { |
12038 | int min_distance, distance; | |
2311178e | 12039 | |
5f5c8ee5 GM |
12040 | /* Move forward by display lines to find the new window |
12041 | start. If window width was enlarged, the new start can | |
12042 | be expected to be > the old start. If window width was | |
12043 | decreased, the new window start will be < the old start. | |
12044 | So, we're looking for the display line start with the | |
12045 | minimum distance from the old window start. */ | |
12046 | pos = it.current.pos; | |
12047 | min_distance = INFINITY; | |
12048 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
12049 | distance < min_distance) | |
12050 | { | |
12051 | min_distance = distance; | |
12052 | pos = it.current.pos; | |
12053 | move_it_by_lines (&it, 1, 0); | |
12054 | } | |
2311178e | 12055 | |
5f5c8ee5 GM |
12056 | /* Set the window start there. */ |
12057 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
12058 | window_start_changed_p = 1; | |
12059 | } | |
1f1ff51d | 12060 | } |
2311178e | 12061 | |
5f5c8ee5 | 12062 | return window_start_changed_p; |
1f1ff51d KH |
12063 | } |
12064 | ||
5f5c8ee5 | 12065 | |
1dd5768b | 12066 | /* Try cursor movement in case text has not changed in window WINDOW, |
47589c8c GM |
12067 | with window start STARTP. Value is |
12068 | ||
cb617e7c | 12069 | CURSOR_MOVEMENT_SUCCESS if successful |
2311178e | 12070 | |
cb617e7c GM |
12071 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
12072 | ||
12073 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
12074 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
12075 | we want to scroll as if scroll-step were set to 1. See the code. | |
12076 | ||
12077 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
12078 | which case we have to abort this redisplay, and adjust matrices | |
12079 | first. */ | |
12080 | ||
2311178e | 12081 | enum |
cb617e7c GM |
12082 | { |
12083 | CURSOR_MOVEMENT_SUCCESS, | |
12084 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
12085 | CURSOR_MOVEMENT_MUST_SCROLL, | |
12086 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
12087 | }; | |
47589c8c GM |
12088 | |
12089 | static int | |
12090 | try_cursor_movement (window, startp, scroll_step) | |
12091 | Lisp_Object window; | |
12092 | struct text_pos startp; | |
12093 | int *scroll_step; | |
12094 | { | |
12095 | struct window *w = XWINDOW (window); | |
12096 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 12097 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
2311178e | 12098 | |
69d1f7c9 | 12099 | #if GLYPH_DEBUG |
76cb5e06 GM |
12100 | if (inhibit_try_cursor_movement) |
12101 | return rc; | |
12102 | #endif | |
12103 | ||
47589c8c GM |
12104 | /* Handle case where text has not changed, only point, and it has |
12105 | not moved off the frame. */ | |
12106 | if (/* Point may be in this window. */ | |
12107 | PT >= CHARPOS (startp) | |
47589c8c GM |
12108 | /* Selective display hasn't changed. */ |
12109 | && !current_buffer->clip_changed | |
4db87380 GM |
12110 | /* Function force-mode-line-update is used to force a thorough |
12111 | redisplay. It sets either windows_or_buffers_changed or | |
12112 | update_mode_lines. So don't take a shortcut here for these | |
12113 | cases. */ | |
12114 | && !update_mode_lines | |
12115 | && !windows_or_buffers_changed | |
5fb96e96 | 12116 | && !cursor_type_changed |
2311178e | 12117 | /* Can't use this case if highlighting a region. When a |
47589c8c GM |
12118 | region exists, cursor movement has to do more than just |
12119 | set the cursor. */ | |
12120 | && !(!NILP (Vtransient_mark_mode) | |
12121 | && !NILP (current_buffer->mark_active)) | |
12122 | && NILP (w->region_showing) | |
12123 | && NILP (Vshow_trailing_whitespace) | |
12124 | /* Right after splitting windows, last_point may be nil. */ | |
12125 | && INTEGERP (w->last_point) | |
12126 | /* This code is not used for mini-buffer for the sake of the case | |
12127 | of redisplaying to replace an echo area message; since in | |
12128 | that case the mini-buffer contents per se are usually | |
12129 | unchanged. This code is of no real use in the mini-buffer | |
12130 | since the handling of this_line_start_pos, etc., in redisplay | |
12131 | handles the same cases. */ | |
12132 | && !EQ (window, minibuf_window) | |
12133 | /* When splitting windows or for new windows, it happens that | |
12134 | redisplay is called with a nil window_end_vpos or one being | |
12135 | larger than the window. This should really be fixed in | |
12136 | window.c. I don't have this on my list, now, so we do | |
12137 | approximately the same as the old redisplay code. --gerd. */ | |
12138 | && INTEGERP (w->window_end_vpos) | |
12139 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
12140 | && (FRAME_WINDOW_P (f) | |
351b5434 | 12141 | || !overlay_arrow_in_current_buffer_p ())) |
47589c8c | 12142 | { |
38793d6a | 12143 | int this_scroll_margin, top_scroll_margin; |
8ee5b6a3 | 12144 | struct glyph_row *row = NULL; |
47589c8c GM |
12145 | |
12146 | #if GLYPH_DEBUG | |
12147 | debug_method_add (w, "cursor movement"); | |
12148 | #endif | |
12149 | ||
12150 | /* Scroll if point within this distance from the top or bottom | |
12151 | of the window. This is a pixel value. */ | |
12152 | this_scroll_margin = max (0, scroll_margin); | |
da8b7f4f KS |
12153 | this_scroll_margin = min (this_scroll_margin, WINDOW_TOTAL_LINES (w) / 4); |
12154 | this_scroll_margin *= FRAME_LINE_HEIGHT (f); | |
47589c8c | 12155 | |
38793d6a KS |
12156 | top_scroll_margin = this_scroll_margin; |
12157 | if (WINDOW_WANTS_HEADER_LINE_P (w)) | |
12158 | top_scroll_margin += CURRENT_HEADER_LINE_HEIGHT (w); | |
12159 | ||
47589c8c GM |
12160 | /* Start with the row the cursor was displayed during the last |
12161 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
12162 | if (w->last_cursor.vpos < 0 |
12163 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 12164 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
12165 | else |
12166 | { | |
12167 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
12168 | if (row->mode_line_p) | |
12169 | ++row; | |
12170 | if (!row->enabled_p) | |
cb617e7c | 12171 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
12172 | } |
12173 | ||
cb617e7c | 12174 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
12175 | { |
12176 | int scroll_p = 0; | |
68c5d1db | 12177 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
2311178e | 12178 | |
47589c8c GM |
12179 | if (PT > XFASTINT (w->last_point)) |
12180 | { | |
12181 | /* Point has moved forward. */ | |
47589c8c GM |
12182 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
12183 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
12184 | { | |
12185 | xassert (row->enabled_p); | |
12186 | ++row; | |
12187 | } | |
12188 | ||
12189 | /* The end position of a row equals the start position | |
12190 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
12191 | display it in the next line. */ |
12192 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
12193 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
12194 | && !cursor_row_p (w, row)) | |
12195 | ++row; | |
47589c8c GM |
12196 | |
12197 | /* If within the scroll margin, scroll. Note that | |
12198 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
12199 | the next line would be drawn, and that | |
12200 | this_scroll_margin can be zero. */ | |
12201 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
12202 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
12203 | /* Line is completely visible last line in window | |
12204 | and PT is to be set in the next line. */ | |
12205 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
12206 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
12207 | && !row->ends_at_zv_p | |
12208 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
12209 | scroll_p = 1; | |
12210 | } | |
12211 | else if (PT < XFASTINT (w->last_point)) | |
12212 | { | |
12213 | /* Cursor has to be moved backward. Note that PT >= | |
70567d1c | 12214 | CHARPOS (startp) because of the outer if-statement. */ |
47589c8c GM |
12215 | while (!row->mode_line_p |
12216 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
12217 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
e0e9a80e KS |
12218 | && (MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row) |
12219 | || (/* STARTS_IN_MIDDLE_OF_STRING_P (row) */ | |
12220 | row > w->current_matrix->rows | |
12221 | && (row-1)->ends_in_newline_from_string_p)))) | |
38793d6a | 12222 | && (row->y > top_scroll_margin |
47589c8c GM |
12223 | || CHARPOS (startp) == BEGV)) |
12224 | { | |
12225 | xassert (row->enabled_p); | |
12226 | --row; | |
12227 | } | |
12228 | ||
12229 | /* Consider the following case: Window starts at BEGV, | |
12230 | there is invisible, intangible text at BEGV, so that | |
12231 | display starts at some point START > BEGV. It can | |
12232 | happen that we are called with PT somewhere between | |
12233 | BEGV and START. Try to handle that case. */ | |
12234 | if (row < w->current_matrix->rows | |
12235 | || row->mode_line_p) | |
12236 | { | |
12237 | row = w->current_matrix->rows; | |
12238 | if (row->mode_line_p) | |
12239 | ++row; | |
12240 | } | |
12241 | ||
12242 | /* Due to newlines in overlay strings, we may have to | |
12243 | skip forward over overlay strings. */ | |
68c5d1db GM |
12244 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
12245 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
12246 | && !cursor_row_p (w, row)) | |
47589c8c | 12247 | ++row; |
2311178e | 12248 | |
47589c8c | 12249 | /* If within the scroll margin, scroll. */ |
38793d6a | 12250 | if (row->y < top_scroll_margin |
47589c8c GM |
12251 | && CHARPOS (startp) != BEGV) |
12252 | scroll_p = 1; | |
12253 | } | |
e10ee30c KS |
12254 | else |
12255 | { | |
12256 | /* Cursor did not move. So don't scroll even if cursor line | |
12257 | is partially visible, as it was so before. */ | |
12258 | rc = CURSOR_MOVEMENT_SUCCESS; | |
12259 | } | |
47589c8c GM |
12260 | |
12261 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
12262 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
12263 | { | |
12264 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 12265 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 12266 | } |
e10ee30c KS |
12267 | else if (rc != CURSOR_MOVEMENT_SUCCESS |
12268 | && MATRIX_ROW_PARTIALLY_VISIBLE_P (w, row) | |
8232c913 | 12269 | && make_cursor_line_fully_visible_p) |
47589c8c | 12270 | { |
8de4aaf8 GM |
12271 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
12272 | && !row->ends_at_zv_p | |
12273 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 12274 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 12275 | else if (row->height > window_box_height (w)) |
440fc135 | 12276 | { |
8de4aaf8 GM |
12277 | /* If we end up in a partially visible line, let's |
12278 | make it fully visible, except when it's taller | |
12279 | than the window, in which case we can't do much | |
12280 | about it. */ | |
440fc135 | 12281 | *scroll_step = 1; |
cb617e7c | 12282 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
12283 | } |
12284 | else | |
12285 | { | |
12286 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
e10ee30c | 12287 | if (!cursor_row_fully_visible_p (w, 0, 1)) |
ddf6b9a3 | 12288 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
cb617e7c GM |
12289 | else |
12290 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 12291 | } |
47589c8c GM |
12292 | } |
12293 | else if (scroll_p) | |
cb617e7c | 12294 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
12295 | else |
12296 | { | |
12297 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 12298 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
12299 | } |
12300 | } | |
12301 | } | |
12302 | ||
12303 | return rc; | |
12304 | } | |
12305 | ||
9a08d928 SM |
12306 | void |
12307 | set_vertical_scroll_bar (w) | |
12308 | struct window *w; | |
12309 | { | |
12310 | int start, end, whole; | |
12311 | ||
12312 | /* Calculate the start and end positions for the current window. | |
12313 | At some point, it would be nice to choose between scrollbars | |
12314 | which reflect the whole buffer size, with special markers | |
12315 | indicating narrowing, and scrollbars which reflect only the | |
12316 | visible region. | |
be21b925 | 12317 | |
9a08d928 SM |
12318 | Note that mini-buffers sometimes aren't displaying any text. */ |
12319 | if (!MINI_WINDOW_P (w) | |
12320 | || (w == XWINDOW (minibuf_window) | |
12321 | && NILP (echo_area_buffer[0]))) | |
12322 | { | |
12323 | struct buffer *buf = XBUFFER (w->buffer); | |
12324 | whole = BUF_ZV (buf) - BUF_BEGV (buf); | |
12325 | start = marker_position (w->start) - BUF_BEGV (buf); | |
12326 | /* I don't think this is guaranteed to be right. For the | |
12327 | moment, we'll pretend it is. */ | |
12328 | end = BUF_Z (buf) - XFASTINT (w->window_end_pos) - BUF_BEGV (buf); | |
be21b925 | 12329 | |
9a08d928 SM |
12330 | if (end < start) |
12331 | end = start; | |
12332 | if (whole < (end - start)) | |
12333 | whole = end - start; | |
12334 | } | |
12335 | else | |
12336 | start = end = whole = 0; | |
12337 | ||
12338 | /* Indicate what this scroll bar ought to be displaying now. */ | |
12339 | set_vertical_scroll_bar_hook (w, end - start, whole, start); | |
12340 | } | |
47589c8c | 12341 | |
88e6b646 | 12342 | |
5f5c8ee5 | 12343 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
b60c9653 RS |
12344 | selected_window is redisplayed. |
12345 | ||
12346 | We can return without actually redisplaying the window if | |
12347 | fonts_changed_p is nonzero. In that case, redisplay_internal will | |
12348 | retry. */ | |
90adcf20 | 12349 | |
a2889657 | 12350 | static void |
5f5c8ee5 | 12351 | redisplay_window (window, just_this_one_p) |
a2889657 | 12352 | Lisp_Object window; |
5f5c8ee5 | 12353 | int just_this_one_p; |
a2889657 | 12354 | { |
5f5c8ee5 GM |
12355 | struct window *w = XWINDOW (window); |
12356 | struct frame *f = XFRAME (w->frame); | |
12357 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 12358 | struct buffer *old = current_buffer; |
5f5c8ee5 | 12359 | struct text_pos lpoint, opoint, startp; |
e481f960 | 12360 | int update_mode_line; |
5f5c8ee5 GM |
12361 | int tem; |
12362 | struct it it; | |
12363 | /* Record it now because it's overwritten. */ | |
12364 | int current_matrix_up_to_date_p = 0; | |
88e6b646 | 12365 | int used_current_matrix_p = 0; |
c62c1bb5 RS |
12366 | /* This is less strict than current_matrix_up_to_date_p. |
12367 | It indictes that the buffer contents and narrowing are unchanged. */ | |
12368 | int buffer_unchanged_p = 0; | |
5f5c8ee5 | 12369 | int temp_scroll_step = 0; |
331379bf | 12370 | int count = SPECPDL_INDEX (); |
47589c8c | 12371 | int rc; |
e10ee30c | 12372 | int centering_position = -1; |
03b0a4b4 | 12373 | int last_line_misfit = 0; |
a2889657 | 12374 | |
5f5c8ee5 GM |
12375 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
12376 | opoint = lpoint; | |
a2889657 | 12377 | |
5f5c8ee5 GM |
12378 | /* W must be a leaf window here. */ |
12379 | xassert (!NILP (w->buffer)); | |
12380 | #if GLYPH_DEBUG | |
12381 | *w->desired_matrix->method = 0; | |
12382 | #endif | |
2e54982e RS |
12383 | |
12384 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
12385 | |
12386 | reconsider_clip_changes (w, buffer); | |
2311178e TTN |
12387 | |
12388 | /* Has the mode line to be updated? */ | |
5f5c8ee5 GM |
12389 | update_mode_line = (!NILP (w->update_mode_line) |
12390 | || update_mode_lines | |
c62c1bb5 RS |
12391 | || buffer->clip_changed |
12392 | || buffer->prevent_redisplay_optimizations_p); | |
8de2d90b JB |
12393 | |
12394 | if (MINI_WINDOW_P (w)) | |
12395 | { | |
5f5c8ee5 | 12396 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 12397 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
12398 | { |
12399 | if (update_mode_line) | |
12400 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 12401 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
12402 | goto finish_menu_bars; |
12403 | else | |
12404 | /* We've already displayed the echo area glyphs in this window. */ | |
12405 | goto finish_scroll_bars; | |
12406 | } | |
b2b5455d RS |
12407 | else if ((w != XWINDOW (minibuf_window) |
12408 | || minibuf_level == 0) | |
c0bcce6f JPW |
12409 | /* When buffer is nonempty, redisplay window normally. */ |
12410 | && BUF_Z (XBUFFER (w->buffer)) == BUF_BEG (XBUFFER (w->buffer)) | |
3354fdcf RS |
12411 | /* Quail displays non-mini buffers in minibuffer window. |
12412 | In that case, redisplay the window normally. */ | |
b2b5455d | 12413 | && !NILP (Fmemq (w->buffer, Vminibuffer_list))) |
8de2d90b | 12414 | { |
3354fdcf RS |
12415 | /* W is a mini-buffer window, but it's not active, so clear |
12416 | it. */ | |
5f5c8ee5 GM |
12417 | int yb = window_text_bottom_y (w); |
12418 | struct glyph_row *row; | |
12419 | int y; | |
12420 | ||
12421 | for (y = 0, row = w->desired_matrix->rows; | |
12422 | y < yb; | |
12423 | y += row->height, ++row) | |
12424 | blank_row (w, row, y); | |
88f22aff | 12425 | goto finish_scroll_bars; |
8de2d90b | 12426 | } |
c095a1dd GM |
12427 | |
12428 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 12429 | } |
a2889657 | 12430 | |
5f5c8ee5 GM |
12431 | /* Otherwise set up data on this window; select its buffer and point |
12432 | value. */ | |
6a93695f GM |
12433 | /* Really select the buffer, for the sake of buffer-local |
12434 | variables. */ | |
12435 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
12436 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
12437 | ||
12438 | current_matrix_up_to_date_p | |
12439 | = (!NILP (w->window_end_valid) | |
12440 | && !current_buffer->clip_changed | |
c62c1bb5 | 12441 | && !current_buffer->prevent_redisplay_optimizations_p |
5f5c8ee5 GM |
12442 | && XFASTINT (w->last_modified) >= MODIFF |
12443 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 12444 | |
c62c1bb5 RS |
12445 | buffer_unchanged_p |
12446 | = (!NILP (w->window_end_valid) | |
12447 | && !current_buffer->clip_changed | |
3f1258d0 | 12448 | && XFASTINT (w->last_modified) >= MODIFF |
c62c1bb5 RS |
12449 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); |
12450 | ||
5f5c8ee5 GM |
12451 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
12452 | the window end being valid, so set it to nil there. */ | |
12453 | if (windows_or_buffers_changed) | |
12454 | { | |
12455 | /* If window starts on a continuation line, maybe adjust the | |
12456 | window start in case the window's width changed. */ | |
12457 | if (XMARKER (w->start)->buffer == current_buffer) | |
12458 | compute_window_start_on_continuation_line (w); | |
2311178e | 12459 | |
5f5c8ee5 GM |
12460 | w->window_end_valid = Qnil; |
12461 | } | |
12adba34 | 12462 | |
5f5c8ee5 GM |
12463 | /* Some sanity checks. */ |
12464 | CHECK_WINDOW_END (w); | |
12465 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 12466 | abort (); |
5f5c8ee5 | 12467 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 12468 | abort (); |
a2889657 | 12469 | |
28995e67 RS |
12470 | /* If %c is in mode line, update it if needed. */ |
12471 | if (!NILP (w->column_number_displayed) | |
12472 | /* This alternative quickly identifies a common case | |
12473 | where no change is needed. */ | |
12474 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
12475 | && XFASTINT (w->last_modified) >= MODIFF |
12476 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
12477 | && (XFASTINT (w->column_number_displayed) |
12478 | != (int) current_column ())) /* iftc */ | |
12479 | update_mode_line = 1; | |
28995e67 | 12480 | |
5f5c8ee5 GM |
12481 | /* Count number of windows showing the selected buffer. An indirect |
12482 | buffer counts as its base buffer. */ | |
12483 | if (!just_this_one_p) | |
42640f83 RS |
12484 | { |
12485 | struct buffer *current_base, *window_base; | |
12486 | current_base = current_buffer; | |
12487 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
12488 | if (current_base->base_buffer) | |
12489 | current_base = current_base->base_buffer; | |
12490 | if (window_base->base_buffer) | |
12491 | window_base = window_base->base_buffer; | |
12492 | if (current_base == window_base) | |
12493 | buffer_shared++; | |
12494 | } | |
a2889657 | 12495 | |
5f5c8ee5 GM |
12496 | /* Point refers normally to the selected window. For any other |
12497 | window, set up appropriate value. */ | |
a2889657 JB |
12498 | if (!EQ (window, selected_window)) |
12499 | { | |
12adba34 RS |
12500 | int new_pt = XMARKER (w->pointm)->charpos; |
12501 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 12502 | if (new_pt < BEGV) |
a2889657 | 12503 | { |
f67a0f51 | 12504 | new_pt = BEGV; |
12adba34 RS |
12505 | new_pt_byte = BEGV_BYTE; |
12506 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 12507 | } |
f67a0f51 | 12508 | else if (new_pt > (ZV - 1)) |
a2889657 | 12509 | { |
f67a0f51 | 12510 | new_pt = ZV; |
12adba34 RS |
12511 | new_pt_byte = ZV_BYTE; |
12512 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 12513 | } |
2311178e | 12514 | |
f67a0f51 | 12515 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 12516 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
12517 | } |
12518 | ||
f4faa47c | 12519 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
12520 | have changed, invalidate the width run cache. It's true that |
12521 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
12522 | redisplay goes (non-fatally) haywire when the display table is |
12523 | changed, so why should we worry about doing any better? */ | |
12524 | if (current_buffer->width_run_cache) | |
12525 | { | |
f908610f | 12526 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
12527 | |
12528 | if (! disptab_matches_widthtab (disptab, | |
12529 | XVECTOR (current_buffer->width_table))) | |
12530 | { | |
12531 | invalidate_region_cache (current_buffer, | |
12532 | current_buffer->width_run_cache, | |
12533 | BEG, Z); | |
12534 | recompute_width_table (current_buffer, disptab); | |
12535 | } | |
12536 | } | |
12537 | ||
a2889657 | 12538 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
12539 | if (XMARKER (w->start)->buffer != current_buffer) |
12540 | goto recenter; | |
12541 | ||
5f5c8ee5 | 12542 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 12543 | |
cf0df6ab RS |
12544 | /* If someone specified a new starting point but did not insist, |
12545 | check whether it can be used. */ | |
cfad01b4 GM |
12546 | if (!NILP (w->optional_new_start) |
12547 | && CHARPOS (startp) >= BEGV | |
12548 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
12549 | { |
12550 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
12551 | start_display (&it, w, startp); |
12552 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
12553 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
12554 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab | 12555 | w->force_start = Qt; |
29b3ea63 KS |
12556 | /* IT may overshoot PT if text at PT is invisible. */ |
12557 | else if (IT_CHARPOS (it) > PT && CHARPOS (startp) <= PT) | |
12558 | w->force_start = Qt; | |
12559 | ||
12560 | ||
cf0df6ab RS |
12561 | } |
12562 | ||
8de2d90b | 12563 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 12564 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
12565 | if (!NILP (w->force_start) |
12566 | || w->frozen_window_start_p) | |
a2889657 | 12567 | { |
b60c9653 RS |
12568 | /* We set this later on if we have to adjust point. */ |
12569 | int new_vpos = -1; | |
493c1d49 | 12570 | int val; |
b60c9653 | 12571 | |
e63574d7 | 12572 | w->force_start = Qnil; |
5f5c8ee5 | 12573 | w->vscroll = 0; |
b5174a51 | 12574 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
12575 | |
12576 | /* Forget any recorded base line for line number display. */ | |
c62c1bb5 | 12577 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
12578 | w->base_line_number = Qnil; |
12579 | ||
75c43375 RS |
12580 | /* Redisplay the mode line. Select the buffer properly for that. |
12581 | Also, run the hook window-scroll-functions | |
12582 | because we have scrolled. */ | |
e63574d7 RS |
12583 | /* Note, we do this after clearing force_start because |
12584 | if there's an error, it is better to forget about force_start | |
12585 | than to get into an infinite loop calling the hook functions | |
12586 | and having them get more errors. */ | |
75c43375 RS |
12587 | if (!update_mode_line |
12588 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 12589 | { |
e481f960 RS |
12590 | update_mode_line = 1; |
12591 | w->update_mode_line = Qt; | |
5f5c8ee5 | 12592 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 12593 | } |
2311178e | 12594 | |
ac90c44f GM |
12595 | w->last_modified = make_number (0); |
12596 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
12597 | if (CHARPOS (startp) < BEGV) |
12598 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
12599 | else if (CHARPOS (startp) > ZV) | |
12600 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
2311178e TTN |
12601 | |
12602 | /* Redisplay, then check if cursor has been set during the | |
5f5c8ee5 | 12603 | redisplay. Give up if new fonts were loaded. */ |
493c1d49 RS |
12604 | val = try_window (window, startp, 1); |
12605 | if (!val) | |
5f5c8ee5 GM |
12606 | { |
12607 | w->force_start = Qt; | |
12608 | clear_glyph_matrix (w->desired_matrix); | |
b60c9653 | 12609 | goto need_larger_matrices; |
5f5c8ee5 | 12610 | } |
493c1d49 RS |
12611 | /* Point was outside the scroll margins. */ |
12612 | if (val < 0) | |
12613 | new_vpos = window_box_height (w) / 2; | |
5f5c8ee5 | 12614 | |
9472f927 | 12615 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 12616 | { |
b28cb6ed GM |
12617 | /* If point does not appear, try to move point so it does |
12618 | appear. The desired matrix has been built above, so we | |
12619 | can use it here. */ | |
b60c9653 RS |
12620 | new_vpos = window_box_height (w) / 2; |
12621 | } | |
12622 | ||
e10ee30c | 12623 | if (!cursor_row_fully_visible_p (w, 0, 0)) |
b60c9653 RS |
12624 | { |
12625 | /* Point does appear, but on a line partly visible at end of window. | |
12626 | Move it back to a fully-visible line. */ | |
12627 | new_vpos = window_box_height (w); | |
12628 | } | |
12629 | ||
12630 | /* If we need to move point for either of the above reasons, | |
12631 | now actually do it. */ | |
12632 | if (new_vpos >= 0) | |
12633 | { | |
b28cb6ed GM |
12634 | struct glyph_row *row; |
12635 | ||
b28cb6ed | 12636 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); |
b60c9653 | 12637 | while (MATRIX_ROW_BOTTOM_Y (row) < new_vpos) |
5f5c8ee5 GM |
12638 | ++row; |
12639 | ||
12640 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
12641 | MATRIX_ROW_START_BYTEPOS (row)); | |
12642 | ||
90adcf20 | 12643 | if (w != XWINDOW (selected_window)) |
12adba34 | 12644 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
12645 | else if (current_buffer == old) |
12646 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
12647 | ||
12648 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
2311178e | 12649 | |
5f5c8ee5 GM |
12650 | /* If we are highlighting the region, then we just changed |
12651 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
12652 | if (!NILP (Vtransient_mark_mode) |
12653 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 12654 | { |
5f5c8ee5 | 12655 | clear_glyph_matrix (w->desired_matrix); |
493c1d49 | 12656 | if (!try_window (window, startp, 0)) |
cb617e7c | 12657 | goto need_larger_matrices; |
6f27fa9b | 12658 | } |
a2889657 | 12659 | } |
5f5c8ee5 | 12660 | |
5f5c8ee5 GM |
12661 | #if GLYPH_DEBUG |
12662 | debug_method_add (w, "forced window start"); | |
12663 | #endif | |
a2889657 JB |
12664 | goto done; |
12665 | } | |
12666 | ||
5f5c8ee5 | 12667 | /* Handle case where text has not changed, only point, and it has |
3f029ea0 RS |
12668 | not moved off the frame, and we are not retrying after hscroll. |
12669 | (current_matrix_up_to_date_p is nonzero when retrying.) */ | |
12670 | if (current_matrix_up_to_date_p | |
47589c8c | 12671 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 12672 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 12673 | { |
cb617e7c GM |
12674 | switch (rc) |
12675 | { | |
12676 | case CURSOR_MOVEMENT_SUCCESS: | |
88e6b646 | 12677 | used_current_matrix_p = 1; |
cb617e7c | 12678 | goto done; |
2311178e | 12679 | |
b60c9653 | 12680 | #if 0 /* try_cursor_movement never returns this value. */ |
cb617e7c GM |
12681 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: |
12682 | goto need_larger_matrices; | |
b60c9653 | 12683 | #endif |
2311178e | 12684 | |
cb617e7c GM |
12685 | case CURSOR_MOVEMENT_MUST_SCROLL: |
12686 | goto try_to_scroll; | |
2311178e | 12687 | |
cb617e7c GM |
12688 | default: |
12689 | abort (); | |
12690 | } | |
a2889657 JB |
12691 | } |
12692 | /* If current starting point was originally the beginning of a line | |
12693 | but no longer is, find a new starting point. */ | |
265a9e55 | 12694 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
12695 | && !(CHARPOS (startp) <= BEGV |
12696 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 12697 | { |
5f5c8ee5 GM |
12698 | #if GLYPH_DEBUG |
12699 | debug_method_add (w, "recenter 1"); | |
12700 | #endif | |
a2889657 JB |
12701 | goto recenter; |
12702 | } | |
2311178e | 12703 | |
27d16f05 GM |
12704 | /* Try scrolling with try_window_id. Value is > 0 if update has |
12705 | been done, it is -1 if we know that the same window start will | |
12706 | not work. It is 0 if unsuccessful for some other reason. */ | |
12707 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 12708 | { |
5f5c8ee5 | 12709 | #if GLYPH_DEBUG |
ef121659 | 12710 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
12711 | #endif |
12712 | ||
12713 | if (fonts_changed_p) | |
cb617e7c | 12714 | goto need_larger_matrices; |
a2889657 JB |
12715 | if (tem > 0) |
12716 | goto done; | |
ef121659 | 12717 | |
5f5c8ee5 GM |
12718 | /* Otherwise try_window_id has returned -1 which means that we |
12719 | don't want the alternative below this comment to execute. */ | |
a2889657 | 12720 | } |
5f5c8ee5 GM |
12721 | else if (CHARPOS (startp) >= BEGV |
12722 | && CHARPOS (startp) <= ZV | |
12723 | && PT >= CHARPOS (startp) | |
12724 | && (CHARPOS (startp) < ZV | |
e9874cee | 12725 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 12726 | || CHARPOS (startp) == BEGV |
8850a573 RS |
12727 | || (XFASTINT (w->last_modified) >= MODIFF |
12728 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 12729 | { |
5f5c8ee5 GM |
12730 | #if GLYPH_DEBUG |
12731 | debug_method_add (w, "same window start"); | |
12732 | #endif | |
2311178e | 12733 | |
5f5c8ee5 GM |
12734 | /* Try to redisplay starting at same place as before. |
12735 | If point has not moved off frame, accept the results. */ | |
12736 | if (!current_matrix_up_to_date_p | |
12737 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
12738 | because a window scroll function can have changed the |
12739 | buffer. */ | |
5f5c8ee5 GM |
12740 | || !NILP (Vwindow_scroll_functions) |
12741 | || MINI_WINDOW_P (w) | |
70567d1c RS |
12742 | || !(used_current_matrix_p |
12743 | = try_window_reusing_current_matrix (w))) | |
5f5c8ee5 GM |
12744 | { |
12745 | IF_DEBUG (debug_method_add (w, "1")); | |
493c1d49 RS |
12746 | if (try_window (window, startp, 1) < 0) |
12747 | /* -1 means we need to scroll. | |
12748 | 0 means we need new matrices, but fonts_changed_p | |
12749 | is set in that case, so we will detect it below. */ | |
12750 | goto try_to_scroll; | |
5f5c8ee5 GM |
12751 | } |
12752 | ||
12753 | if (fonts_changed_p) | |
cb617e7c | 12754 | goto need_larger_matrices; |
2311178e | 12755 | |
5f5c8ee5 | 12756 | if (w->cursor.vpos >= 0) |
aa6d10fa | 12757 | { |
2311178e | 12758 | if (!just_this_one_p |
5f5c8ee5 | 12759 | || current_buffer->clip_changed |
9142dd5b | 12760 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
12761 | /* Forget any recorded base line for line number display. */ |
12762 | w->base_line_number = Qnil; | |
2311178e | 12763 | |
e10ee30c | 12764 | if (!cursor_row_fully_visible_p (w, 1, 0)) |
03b0a4b4 RS |
12765 | { |
12766 | clear_glyph_matrix (w->desired_matrix); | |
12767 | last_line_misfit = 1; | |
12768 | } | |
ddf6b9a3 | 12769 | /* Drop through and scroll. */ |
ef3c2c73 RS |
12770 | else |
12771 | goto done; | |
aa6d10fa | 12772 | } |
a2889657 | 12773 | else |
5f5c8ee5 | 12774 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
12775 | } |
12776 | ||
5f5c8ee5 GM |
12777 | try_to_scroll: |
12778 | ||
ac90c44f GM |
12779 | w->last_modified = make_number (0); |
12780 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 12781 | |
e481f960 RS |
12782 | /* Redisplay the mode line. Select the buffer properly for that. */ |
12783 | if (!update_mode_line) | |
12784 | { | |
e481f960 RS |
12785 | update_mode_line = 1; |
12786 | w->update_mode_line = Qt; | |
12787 | } | |
a2889657 | 12788 | |
5f5c8ee5 GM |
12789 | /* Try to scroll by specified few lines. */ |
12790 | if ((scroll_conservatively | |
12791 | || scroll_step | |
12792 | || temp_scroll_step | |
12793 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
12794 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 12795 | && !current_buffer->clip_changed |
2311178e | 12796 | && CHARPOS (startp) >= BEGV |
5f5c8ee5 | 12797 | && CHARPOS (startp) <= ZV) |
0789adb2 | 12798 | { |
5f5c8ee5 GM |
12799 | /* The function returns -1 if new fonts were loaded, 1 if |
12800 | successful, 0 if not successful. */ | |
12801 | int rc = try_scrolling (window, just_this_one_p, | |
12802 | scroll_conservatively, | |
12803 | scroll_step, | |
03b0a4b4 | 12804 | temp_scroll_step, last_line_misfit); |
cb617e7c GM |
12805 | switch (rc) |
12806 | { | |
12807 | case SCROLLING_SUCCESS: | |
12808 | goto done; | |
2311178e | 12809 | |
cb617e7c GM |
12810 | case SCROLLING_NEED_LARGER_MATRICES: |
12811 | goto need_larger_matrices; | |
2311178e | 12812 | |
cb617e7c GM |
12813 | case SCROLLING_FAILED: |
12814 | break; | |
2311178e | 12815 | |
cb617e7c GM |
12816 | default: |
12817 | abort (); | |
12818 | } | |
5f5c8ee5 | 12819 | } |
f9c8af06 | 12820 | |
5f5c8ee5 | 12821 | /* Finally, just choose place to start which centers point */ |
5936754e | 12822 | |
5f5c8ee5 | 12823 | recenter: |
e10ee30c KS |
12824 | if (centering_position < 0) |
12825 | centering_position = window_box_height (w) / 2; | |
44173109 | 12826 | |
5f5c8ee5 GM |
12827 | #if GLYPH_DEBUG |
12828 | debug_method_add (w, "recenter"); | |
12829 | #endif | |
0789adb2 | 12830 | |
5f5c8ee5 | 12831 | /* w->vscroll = 0; */ |
0789adb2 | 12832 | |
5f5c8ee5 | 12833 | /* Forget any previously recorded base line for line number display. */ |
c62c1bb5 | 12834 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
12835 | w->base_line_number = Qnil; |
12836 | ||
12837 | /* Move backward half the height of the window. */ | |
12838 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
12839 | it.current_y = it.last_visible_y; | |
ddf6b9a3 | 12840 | move_it_vertically_backward (&it, centering_position); |
5f5c8ee5 GM |
12841 | xassert (IT_CHARPOS (it) >= BEGV); |
12842 | ||
12843 | /* The function move_it_vertically_backward may move over more | |
12844 | than the specified y-distance. If it->w is small, e.g. a | |
12845 | mini-buffer window, we may end up in front of the window's | |
12846 | display area. Start displaying at the start of the line | |
12847 | containing PT in this case. */ | |
12848 | if (it.current_y <= 0) | |
12849 | { | |
12850 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
546f98b8 | 12851 | move_it_vertically_backward (&it, 0); |
527d43c2 KS |
12852 | #if 0 |
12853 | /* I think this assert is bogus if buffer contains | |
12854 | invisible text or images. KFS. */ | |
5f5c8ee5 | 12855 | xassert (IT_CHARPOS (it) <= PT); |
527d43c2 | 12856 | #endif |
5f5c8ee5 | 12857 | it.current_y = 0; |
0789adb2 RS |
12858 | } |
12859 | ||
5f5c8ee5 | 12860 | it.current_x = it.hpos = 0; |
2311178e | 12861 | |
5f5c8ee5 GM |
12862 | /* Set startp here explicitly in case that helps avoid an infinite loop |
12863 | in case the window-scroll-functions functions get errors. */ | |
12864 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
12865 | ||
12866 | /* Run scroll hooks. */ | |
12867 | startp = run_window_scroll_functions (window, it.current.pos); | |
12868 | ||
12869 | /* Redisplay the window. */ | |
12870 | if (!current_matrix_up_to_date_p | |
12871 | || windows_or_buffers_changed | |
5fb96e96 | 12872 | || cursor_type_changed |
5f5c8ee5 GM |
12873 | /* Don't use try_window_reusing_current_matrix in this case |
12874 | because it can have changed the buffer. */ | |
12875 | || !NILP (Vwindow_scroll_functions) | |
12876 | || !just_this_one_p | |
12877 | || MINI_WINDOW_P (w) | |
70567d1c RS |
12878 | || !(used_current_matrix_p |
12879 | = try_window_reusing_current_matrix (w))) | |
493c1d49 | 12880 | try_window (window, startp, 0); |
5f5c8ee5 GM |
12881 | |
12882 | /* If new fonts have been loaded (due to fontsets), give up. We | |
12883 | have to start a new redisplay since we need to re-adjust glyph | |
12884 | matrices. */ | |
12885 | if (fonts_changed_p) | |
cb617e7c | 12886 | goto need_larger_matrices; |
5f5c8ee5 GM |
12887 | |
12888 | /* If cursor did not appear assume that the middle of the window is | |
12889 | in the first line of the window. Do it again with the next line. | |
12890 | (Imagine a window of height 100, displaying two lines of height | |
12891 | 60. Moving back 50 from it->last_visible_y will end in the first | |
12892 | line.) */ | |
12893 | if (w->cursor.vpos < 0) | |
a2889657 | 12894 | { |
5f5c8ee5 GM |
12895 | if (!NILP (w->window_end_valid) |
12896 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 12897 | { |
5f5c8ee5 GM |
12898 | clear_glyph_matrix (w->desired_matrix); |
12899 | move_it_by_lines (&it, 1, 0); | |
493c1d49 | 12900 | try_window (window, it.current.pos, 0); |
a2889657 | 12901 | } |
5f5c8ee5 | 12902 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 12903 | { |
5f5c8ee5 GM |
12904 | clear_glyph_matrix (w->desired_matrix); |
12905 | move_it_by_lines (&it, -1, 0); | |
493c1d49 | 12906 | try_window (window, it.current.pos, 0); |
5f5c8ee5 GM |
12907 | } |
12908 | else | |
12909 | { | |
12910 | /* Not much we can do about it. */ | |
a2889657 | 12911 | } |
a2889657 | 12912 | } |
010494d0 | 12913 | |
5f5c8ee5 GM |
12914 | /* Consider the following case: Window starts at BEGV, there is |
12915 | invisible, intangible text at BEGV, so that display starts at | |
12916 | some point START > BEGV. It can happen that we are called with | |
12917 | PT somewhere between BEGV and START. Try to handle that case. */ | |
12918 | if (w->cursor.vpos < 0) | |
835766b6 | 12919 | { |
5f5c8ee5 GM |
12920 | struct glyph_row *row = w->current_matrix->rows; |
12921 | if (row->mode_line_p) | |
12922 | ++row; | |
12923 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 12924 | } |
2311178e | 12925 | |
e10ee30c | 12926 | if (!cursor_row_fully_visible_p (w, 0, 0)) |
ddf6b9a3 | 12927 | { |
932357b4 KS |
12928 | /* If vscroll is enabled, disable it and try again. */ |
12929 | if (w->vscroll) | |
12930 | { | |
12931 | w->vscroll = 0; | |
12932 | clear_glyph_matrix (w->desired_matrix); | |
12933 | goto recenter; | |
12934 | } | |
2a6d0874 | 12935 | |
ddf6b9a3 RS |
12936 | /* If centering point failed to make the whole line visible, |
12937 | put point at the top instead. That has to make the whole line | |
12938 | visible, if it can be done. */ | |
6f67f013 KS |
12939 | if (centering_position == 0) |
12940 | goto done; | |
e10ee30c | 12941 | |
cb9d4a9f | 12942 | clear_glyph_matrix (w->desired_matrix); |
ddf6b9a3 | 12943 | centering_position = 0; |
e10ee30c | 12944 | goto recenter; |
ddf6b9a3 | 12945 | } |
b5174a51 | 12946 | |
74d481ac GM |
12947 | done: |
12948 | ||
5f5c8ee5 GM |
12949 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
12950 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
12951 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
12952 | ? Qt : Qnil); | |
a2889657 | 12953 | |
5f5c8ee5 | 12954 | /* Display the mode line, if we must. */ |
e481f960 | 12955 | if ((update_mode_line |
aa6d10fa | 12956 | /* If window not full width, must redo its mode line |
2311178e | 12957 | if (a) the window to its side is being redone and |
5f5c8ee5 GM |
12958 | (b) we do a frame-based redisplay. This is a consequence |
12959 | of how inverted lines are drawn in frame-based redisplay. */ | |
2311178e | 12960 | || (!just_this_one_p |
5f5c8ee5 GM |
12961 | && !FRAME_WINDOW_P (f) |
12962 | && !WINDOW_FULL_WIDTH_P (w)) | |
12963 | /* Line number to display. */ | |
155ef550 | 12964 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 12965 | /* Column number is displayed and different from the one displayed. */ |
155ef550 | 12966 | || (!NILP (w->column_number_displayed) |
2311178e TTN |
12967 | && (XFASTINT (w->column_number_displayed) |
12968 | != (int) current_column ()))) /* iftc */ | |
5f5c8ee5 GM |
12969 | /* This means that the window has a mode line. */ |
12970 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 12971 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 12972 | { |
5f5c8ee5 GM |
12973 | display_mode_lines (w); |
12974 | ||
12975 | /* If mode line height has changed, arrange for a thorough | |
12976 | immediate redisplay using the correct mode line height. */ | |
12977 | if (WINDOW_WANTS_MODELINE_P (w) | |
12978 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 12979 | { |
5f5c8ee5 GM |
12980 | fonts_changed_p = 1; |
12981 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
12982 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 12983 | } |
2311178e | 12984 | |
5f5c8ee5 GM |
12985 | /* If top line height has changed, arrange for a thorough |
12986 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
12987 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
12988 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
12989 | { |
12990 | fonts_changed_p = 1; | |
045dee35 GM |
12991 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
12992 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
12993 | } |
12994 | ||
12995 | if (fonts_changed_p) | |
cb617e7c | 12996 | goto need_larger_matrices; |
5ba50c51 | 12997 | } |
5f5c8ee5 GM |
12998 | |
12999 | if (!line_number_displayed | |
13000 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
13001 | { |
13002 | w->base_line_pos = Qnil; | |
13003 | w->base_line_number = Qnil; | |
13004 | } | |
a2889657 | 13005 | |
5f5c8ee5 | 13006 | finish_menu_bars: |
2311178e | 13007 | |
7ce2c095 | 13008 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 13009 | if (update_mode_line |
5f5c8ee5 GM |
13010 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
13011 | { | |
13012 | int redisplay_menu_p = 0; | |
488dd4c4 | 13013 | int redisplay_tool_bar_p = 0; |
5f5c8ee5 GM |
13014 | |
13015 | if (FRAME_WINDOW_P (f)) | |
13016 | { | |
488dd4c4 JD |
13017 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
13018 | || defined (USE_GTK) | |
5f5c8ee5 | 13019 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 13020 | #else |
5f5c8ee5 | 13021 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 13022 | #endif |
5f5c8ee5 GM |
13023 | } |
13024 | else | |
13025 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
13026 | ||
13027 | if (redisplay_menu_p) | |
13028 | display_menu_bar (w); | |
13029 | ||
13030 | #ifdef HAVE_WINDOW_SYSTEM | |
488dd4c4 JD |
13031 | #ifdef USE_GTK |
13032 | redisplay_tool_bar_p = FRAME_EXTERNAL_TOOL_BAR (f); | |
13033 | #else | |
13034 | redisplay_tool_bar_p = WINDOWP (f->tool_bar_window) | |
13035 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
13036 | || auto_resize_tool_bars_p); | |
177c0ea7 | 13037 | |
488dd4c4 JD |
13038 | #endif |
13039 | ||
13040 | if (redisplay_tool_bar_p) | |
13041 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
13042 | #endif |
13043 | } | |
7ce2c095 | 13044 | |
7af0e8d7 | 13045 | #ifdef HAVE_WINDOW_SYSTEM |
f459b8c0 | 13046 | if (FRAME_WINDOW_P (f) |
61d6a058 KS |
13047 | && update_window_fringes (w, (just_this_one_p |
13048 | || (!used_current_matrix_p && !overlay_arrow_seen) | |
13049 | || w->pseudo_window_p))) | |
88e6b646 KS |
13050 | { |
13051 | update_begin (f); | |
13052 | BLOCK_INPUT; | |
0a1527d6 KS |
13053 | if (draw_window_fringes (w, 1)) |
13054 | x_draw_vertical_border (w); | |
88e6b646 KS |
13055 | UNBLOCK_INPUT; |
13056 | update_end (f); | |
13057 | } | |
7af0e8d7 | 13058 | #endif /* HAVE_WINDOW_SYSTEM */ |
88e6b646 | 13059 | |
b60c9653 RS |
13060 | /* We go to this label, with fonts_changed_p nonzero, |
13061 | if it is necessary to try again using larger glyph matrices. | |
13062 | We have to redeem the scroll bar even in this case, | |
13063 | because the loop in redisplay_internal expects that. */ | |
cb617e7c GM |
13064 | need_larger_matrices: |
13065 | ; | |
88f22aff | 13066 | finish_scroll_bars: |
5f5c8ee5 | 13067 | |
da8b7f4f | 13068 | if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w)) |
30c566e4 | 13069 | { |
9a08d928 SM |
13070 | /* Set the thumb's position and size. */ |
13071 | set_vertical_scroll_bar (w); | |
30c566e4 | 13072 | |
5f5c8ee5 GM |
13073 | /* Note that we actually used the scroll bar attached to this |
13074 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 13075 | redeem_scroll_bar_hook (w); |
30c566e4 | 13076 | } |
b1d1124b | 13077 | |
5f5c8ee5 GM |
13078 | /* Restore current_buffer and value of point in it. */ |
13079 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 13080 | set_buffer_internal_1 (old); |
5f5c8ee5 | 13081 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
13082 | |
13083 | unbind_to (count, Qnil); | |
a2889657 | 13084 | } |
a2889657 | 13085 | |
5f5c8ee5 GM |
13086 | |
13087 | /* Build the complete desired matrix of WINDOW with a window start | |
493c1d49 RS |
13088 | buffer position POS. |
13089 | ||
13090 | Value is 1 if successful. It is zero if fonts were loaded during | |
13091 | redisplay which makes re-adjusting glyph matrices necessary, and -1 | |
13092 | if point would appear in the scroll margins. | |
13093 | (We check that only if CHECK_MARGINS is nonzero. */ | |
5f5c8ee5 GM |
13094 | |
13095 | int | |
493c1d49 | 13096 | try_window (window, pos, check_margins) |
a2889657 | 13097 | Lisp_Object window; |
5f5c8ee5 | 13098 | struct text_pos pos; |
493c1d49 | 13099 | int check_margins; |
5f5c8ee5 GM |
13100 | { |
13101 | struct window *w = XWINDOW (window); | |
13102 | struct it it; | |
13103 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 13104 | |
5f5c8ee5 GM |
13105 | /* Make POS the new window start. */ |
13106 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 13107 | |
5f5c8ee5 GM |
13108 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
13109 | w->cursor.vpos = -1; | |
a2889657 | 13110 | overlay_arrow_seen = 0; |
642eefc6 | 13111 | |
5f5c8ee5 GM |
13112 | /* Initialize iterator and info to start at POS. */ |
13113 | start_display (&it, w, pos); | |
a2889657 | 13114 | |
5f5c8ee5 GM |
13115 | /* Display all lines of W. */ |
13116 | while (it.current_y < it.last_visible_y) | |
13117 | { | |
13118 | if (display_line (&it)) | |
13119 | last_text_row = it.glyph_row - 1; | |
13120 | if (fonts_changed_p) | |
13121 | return 0; | |
13122 | } | |
a2889657 | 13123 | |
493c1d49 | 13124 | /* Don't let the cursor end in the scroll margins. */ |
e3ea3a51 KS |
13125 | if (check_margins |
13126 | && !MINI_WINDOW_P (w)) | |
493c1d49 | 13127 | { |
edf3d146 | 13128 | int this_scroll_margin; |
493c1d49 RS |
13129 | |
13130 | this_scroll_margin = max (0, scroll_margin); | |
13131 | this_scroll_margin = min (this_scroll_margin, WINDOW_TOTAL_LINES (w) / 4); | |
13132 | this_scroll_margin *= FRAME_LINE_HEIGHT (it.f); | |
493c1d49 RS |
13133 | |
13134 | if ((w->cursor.y < this_scroll_margin | |
58e5658e KS |
13135 | && CHARPOS (pos) > BEGV |
13136 | && IT_CHARPOS (it) < ZV) | |
9b869380 RS |
13137 | /* rms: considering make_cursor_line_fully_visible_p here |
13138 | seems to give wrong results. We don't want to recenter | |
13139 | when the last line is partly visible, we want to allow | |
13140 | that case to be handled in the usual way. */ | |
13141 | || (w->cursor.y + 1) > it.last_visible_y) | |
493c1d49 RS |
13142 | { |
13143 | w->cursor.vpos = -1; | |
13144 | clear_glyph_matrix (w->desired_matrix); | |
13145 | return -1; | |
13146 | } | |
13147 | } | |
13148 | ||
5f5c8ee5 GM |
13149 | /* If bottom moved off end of frame, change mode line percentage. */ |
13150 | if (XFASTINT (w->window_end_pos) <= 0 | |
13151 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
13152 | w->update_mode_line = Qt; |
13153 | ||
5f5c8ee5 GM |
13154 | /* Set window_end_pos to the offset of the last character displayed |
13155 | on the window from the end of current_buffer. Set | |
13156 | window_end_vpos to its row number. */ | |
13157 | if (last_text_row) | |
13158 | { | |
13159 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
13160 | w->window_end_bytepos | |
13161 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
13162 | w->window_end_pos |
13163 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
13164 | w->window_end_vpos | |
13165 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
13166 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
13167 | ->displays_text_p); | |
13168 | } | |
13169 | else | |
13170 | { | |
86bf3faa RS |
13171 | w->window_end_bytepos = Z_BYTE - ZV_BYTE; |
13172 | w->window_end_pos = make_number (Z - ZV); | |
13173 | w->window_end_vpos = make_number (0); | |
5f5c8ee5 | 13174 | } |
2311178e | 13175 | |
a2889657 JB |
13176 | /* But that is not valid info until redisplay finishes. */ |
13177 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 13178 | return 1; |
a2889657 | 13179 | } |
5f5c8ee5 GM |
13180 | |
13181 | ||
a2889657 | 13182 | \f |
5f5c8ee5 GM |
13183 | /************************************************************************ |
13184 | Window redisplay reusing current matrix when buffer has not changed | |
13185 | ************************************************************************/ | |
13186 | ||
13187 | /* Try redisplay of window W showing an unchanged buffer with a | |
13188 | different window start than the last time it was displayed by | |
13189 | reusing its current matrix. Value is non-zero if successful. | |
13190 | W->start is the new window start. */ | |
a2889657 JB |
13191 | |
13192 | static int | |
5f5c8ee5 GM |
13193 | try_window_reusing_current_matrix (w) |
13194 | struct window *w; | |
a2889657 | 13195 | { |
5f5c8ee5 GM |
13196 | struct frame *f = XFRAME (w->frame); |
13197 | struct glyph_row *row, *bottom_row; | |
13198 | struct it it; | |
13199 | struct run run; | |
13200 | struct text_pos start, new_start; | |
13201 | int nrows_scrolled, i; | |
13202 | struct glyph_row *last_text_row; | |
13203 | struct glyph_row *last_reused_text_row; | |
13204 | struct glyph_row *start_row; | |
13205 | int start_vpos, min_y, max_y; | |
75c5350a | 13206 | |
69d1f7c9 | 13207 | #if GLYPH_DEBUG |
76cb5e06 GM |
13208 | if (inhibit_try_window_reusing) |
13209 | return 0; | |
13210 | #endif | |
13211 | ||
d18354b6 GM |
13212 | if (/* This function doesn't handle terminal frames. */ |
13213 | !FRAME_WINDOW_P (f) | |
13214 | /* Don't try to reuse the display if windows have been split | |
13215 | or such. */ | |
5fb96e96 RS |
13216 | || windows_or_buffers_changed |
13217 | || cursor_type_changed) | |
5f5c8ee5 | 13218 | return 0; |
a2889657 | 13219 | |
5f5c8ee5 GM |
13220 | /* Can't do this if region may have changed. */ |
13221 | if ((!NILP (Vtransient_mark_mode) | |
13222 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
13223 | || !NILP (w->region_showing) |
13224 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 13225 | return 0; |
a2889657 | 13226 | |
5f5c8ee5 | 13227 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
13228 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
13229 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
13230 | return 0; |
13231 | ||
13232 | /* Give up if old or new display is scrolled vertically. We could | |
13233 | make this function handle this, but right now it doesn't. */ | |
13234 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
546f98b8 | 13235 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (w, start_row)) |
5f5c8ee5 GM |
13236 | return 0; |
13237 | ||
13238 | /* The variable new_start now holds the new window start. The old | |
13239 | start `start' can be determined from the current matrix. */ | |
13240 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
13241 | start = start_row->start.pos; | |
13242 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 13243 | |
5f5c8ee5 GM |
13244 | /* Clear the desired matrix for the display below. */ |
13245 | clear_glyph_matrix (w->desired_matrix); | |
2311178e | 13246 | |
5f5c8ee5 GM |
13247 | if (CHARPOS (new_start) <= CHARPOS (start)) |
13248 | { | |
13249 | int first_row_y; | |
2311178e | 13250 | |
607ec83c GM |
13251 | /* Don't use this method if the display starts with an ellipsis |
13252 | displayed for invisible text. It's not easy to handle that case | |
13253 | below, and it's certainly not worth the effort since this is | |
13254 | not a frequent case. */ | |
13255 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
13256 | return 0; | |
13257 | ||
5f5c8ee5 | 13258 | IF_DEBUG (debug_method_add (w, "twu1")); |
2311178e | 13259 | |
5f5c8ee5 GM |
13260 | /* Display up to a row that can be reused. The variable |
13261 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
13262 | text. Note that it.vpos == 0 if or if not there is a |
13263 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
13264 | start_display (&it, w, new_start); |
13265 | first_row_y = it.current_y; | |
13266 | w->cursor.vpos = -1; | |
13267 | last_text_row = last_reused_text_row = NULL; | |
2311178e | 13268 | |
5f5c8ee5 | 13269 | while (it.current_y < it.last_visible_y |
5f5c8ee5 | 13270 | && !fonts_changed_p) |
3df5f8aa RS |
13271 | { |
13272 | /* If we have reached into the characters in the START row, | |
13273 | that means the line boundaries have changed. So we | |
13274 | can't start copying with the row START. Maybe it will | |
13275 | work to start copying with the following row. */ | |
13276 | while (IT_CHARPOS (it) > CHARPOS (start)) | |
13277 | { | |
13278 | /* Advance to the next row as the "start". */ | |
13279 | start_row++; | |
13280 | start = start_row->start.pos; | |
13281 | /* If there are no more rows to try, or just one, give up. */ | |
13282 | if (start_row == MATRIX_MODE_LINE_ROW (w->current_matrix) - 1 | |
546f98b8 | 13283 | || w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (w, start_row) |
3df5f8aa RS |
13284 | || CHARPOS (start) == ZV) |
13285 | { | |
13286 | clear_glyph_matrix (w->desired_matrix); | |
13287 | return 0; | |
13288 | } | |
13289 | ||
13290 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
13291 | } | |
13292 | /* If we have reached alignment, | |
13293 | we can copy the rest of the rows. */ | |
13294 | if (IT_CHARPOS (it) == CHARPOS (start)) | |
13295 | break; | |
13296 | ||
13297 | if (display_line (&it)) | |
13298 | last_text_row = it.glyph_row - 1; | |
13299 | } | |
5f5c8ee5 GM |
13300 | |
13301 | /* A value of current_y < last_visible_y means that we stopped | |
13302 | at the previous window start, which in turn means that we | |
13303 | have at least one reusable row. */ | |
13304 | if (it.current_y < it.last_visible_y) | |
a2889657 | 13305 | { |
b48f74cb | 13306 | /* IT.vpos always starts from 0; it counts text lines. */ |
3df5f8aa | 13307 | nrows_scrolled = it.vpos - (start_row - MATRIX_FIRST_TEXT_ROW (w->current_matrix)); |
2311178e | 13308 | |
5f5c8ee5 GM |
13309 | /* Find PT if not already found in the lines displayed. */ |
13310 | if (w->cursor.vpos < 0) | |
a2889657 | 13311 | { |
3df5f8aa | 13312 | int dy = it.current_y - start_row->y; |
2311178e | 13313 | |
5f5c8ee5 | 13314 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
0df56f4d GM |
13315 | row = row_containing_pos (w, PT, row, NULL, dy); |
13316 | if (row) | |
13317 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
13318 | dy, nrows_scrolled); | |
13319 | else | |
5f5c8ee5 GM |
13320 | { |
13321 | clear_glyph_matrix (w->desired_matrix); | |
13322 | return 0; | |
13323 | } | |
a2889657 | 13324 | } |
5f5c8ee5 GM |
13325 | |
13326 | /* Scroll the display. Do it before the current matrix is | |
13327 | changed. The problem here is that update has not yet | |
13328 | run, i.e. part of the current matrix is not up to date. | |
13329 | scroll_run_hook will clear the cursor, and use the | |
13330 | current matrix to get the height of the row the cursor is | |
13331 | in. */ | |
3df5f8aa | 13332 | run.current_y = start_row->y; |
5f5c8ee5 GM |
13333 | run.desired_y = it.current_y; |
13334 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
13335 | |
13336 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 13337 | { |
5f5c8ee5 GM |
13338 | update_begin (f); |
13339 | rif->update_window_begin_hook (w); | |
fa3c6b4d | 13340 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 13341 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 13342 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 13343 | update_end (f); |
a2889657 | 13344 | } |
5f5c8ee5 GM |
13345 | |
13346 | /* Shift current matrix down by nrows_scrolled lines. */ | |
13347 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
13348 | rotate_matrix (w->current_matrix, | |
13349 | start_vpos, | |
13350 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
13351 | nrows_scrolled); | |
2311178e | 13352 | |
9c8b8382 | 13353 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 13354 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 13355 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 13356 | |
5f5c8ee5 | 13357 | /* Re-compute Y positions. */ |
da8b7f4f | 13358 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 13359 | max_y = it.last_visible_y; |
b48f74cb GM |
13360 | for (row = start_row + nrows_scrolled; |
13361 | row < bottom_row; | |
13362 | ++row) | |
d2f84654 | 13363 | { |
5f5c8ee5 | 13364 | row->y = it.current_y; |
75c5350a | 13365 | row->visible_height = row->height; |
5f5c8ee5 GM |
13366 | |
13367 | if (row->y < min_y) | |
75c5350a GM |
13368 | row->visible_height -= min_y - row->y; |
13369 | if (row->y + row->height > max_y) | |
13370 | row->visible_height -= row->y + row->height - max_y; | |
88e6b646 | 13371 | row->redraw_fringe_bitmaps_p = 1; |
2311178e | 13372 | |
5f5c8ee5 | 13373 | it.current_y += row->height; |
5f5c8ee5 GM |
13374 | |
13375 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
13376 | last_reused_text_row = row; | |
13377 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
13378 | break; | |
d2f84654 | 13379 | } |
2311178e | 13380 | |
9c8b8382 GM |
13381 | /* Disable lines in the current matrix which are now |
13382 | below the window. */ | |
bafb434c | 13383 | for (++row; row < bottom_row; ++row) |
49c56036 | 13384 | row->enabled_p = row->mode_line_p = 0; |
a2889657 | 13385 | } |
5f5c8ee5 GM |
13386 | |
13387 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
13388 | reused row from the current matrix containing text, if any. | |
13389 | The value of last_text_row is the last displayed line | |
13390 | containing text. */ | |
13391 | if (last_reused_text_row) | |
a2889657 | 13392 | { |
5f5c8ee5 GM |
13393 | w->window_end_bytepos |
13394 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
13395 | w->window_end_pos |
13396 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
13397 | w->window_end_vpos | |
13398 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
13399 | w->current_matrix)); | |
a2889657 | 13400 | } |
5f5c8ee5 GM |
13401 | else if (last_text_row) |
13402 | { | |
13403 | w->window_end_bytepos | |
13404 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
13405 | w->window_end_pos |
13406 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
13407 | w->window_end_vpos | |
13408 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
13409 | } |
13410 | else | |
13411 | { | |
13412 | /* This window must be completely empty. */ | |
86bf3faa RS |
13413 | w->window_end_bytepos = Z_BYTE - ZV_BYTE; |
13414 | w->window_end_pos = make_number (Z - ZV); | |
13415 | w->window_end_vpos = make_number (0); | |
5f5c8ee5 GM |
13416 | } |
13417 | w->window_end_valid = Qnil; | |
a2889657 | 13418 | |
5f5c8ee5 GM |
13419 | /* Update hint: don't try scrolling again in update_window. */ |
13420 | w->desired_matrix->no_scrolling_p = 1; | |
2311178e | 13421 | |
5f5c8ee5 GM |
13422 | #if GLYPH_DEBUG |
13423 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
13424 | #endif | |
13425 | return 1; | |
a2889657 | 13426 | } |
5f5c8ee5 GM |
13427 | else if (CHARPOS (new_start) > CHARPOS (start)) |
13428 | { | |
13429 | struct glyph_row *pt_row, *row; | |
13430 | struct glyph_row *first_reusable_row; | |
13431 | struct glyph_row *first_row_to_display; | |
13432 | int dy; | |
13433 | int yb = window_text_bottom_y (w); | |
13434 | ||
5f5c8ee5 GM |
13435 | /* Find the row starting at new_start, if there is one. Don't |
13436 | reuse a partially visible line at the end. */ | |
b48f74cb | 13437 | first_reusable_row = start_row; |
5f5c8ee5 GM |
13438 | while (first_reusable_row->enabled_p |
13439 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
13440 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
13441 | < CHARPOS (new_start))) | |
13442 | ++first_reusable_row; | |
13443 | ||
13444 | /* Give up if there is no row to reuse. */ | |
13445 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
13446 | || !first_reusable_row->enabled_p |
13447 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
13448 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
13449 | return 0; |
13450 | ||
5f5c8ee5 GM |
13451 | /* We can reuse fully visible rows beginning with |
13452 | first_reusable_row to the end of the window. Set | |
13453 | first_row_to_display to the first row that cannot be reused. | |
13454 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 13455 | pt_row = NULL; |
ac90c44f GM |
13456 | for (first_row_to_display = first_reusable_row; |
13457 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
13458 | ++first_row_to_display) | |
5f5c8ee5 | 13459 | { |
4bde0ebb GM |
13460 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
13461 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 13462 | pt_row = first_row_to_display; |
5f5c8ee5 | 13463 | } |
a2889657 | 13464 | |
5f5c8ee5 GM |
13465 | /* Start displaying at the start of first_row_to_display. */ |
13466 | xassert (first_row_to_display->y < yb); | |
13467 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 13468 | |
b48f74cb GM |
13469 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
13470 | - start_vpos); | |
5f5c8ee5 GM |
13471 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
13472 | - nrows_scrolled); | |
b48f74cb | 13473 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
da8b7f4f | 13474 | + WINDOW_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
13475 | |
13476 | /* Display lines beginning with first_row_to_display in the | |
13477 | desired matrix. Set last_text_row to the last row displayed | |
13478 | that displays text. */ | |
13479 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
13480 | if (pt_row == NULL) | |
13481 | w->cursor.vpos = -1; | |
13482 | last_text_row = NULL; | |
13483 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
13484 | if (display_line (&it)) | |
13485 | last_text_row = it.glyph_row - 1; | |
13486 | ||
13487 | /* Give up If point isn't in a row displayed or reused. */ | |
13488 | if (w->cursor.vpos < 0) | |
13489 | { | |
13490 | clear_glyph_matrix (w->desired_matrix); | |
13491 | return 0; | |
13492 | } | |
12adba34 | 13493 | |
5f5c8ee5 GM |
13494 | /* If point is in a reused row, adjust y and vpos of the cursor |
13495 | position. */ | |
13496 | if (pt_row) | |
13497 | { | |
38793d6a KS |
13498 | w->cursor.vpos -= nrows_scrolled; |
13499 | w->cursor.y -= first_reusable_row->y - start_row->y; | |
a2889657 JB |
13500 | } |
13501 | ||
5f5c8ee5 GM |
13502 | /* Scroll the display. */ |
13503 | run.current_y = first_reusable_row->y; | |
da8b7f4f | 13504 | run.desired_y = WINDOW_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 13505 | run.height = it.last_visible_y - run.current_y; |
4da61803 | 13506 | dy = run.current_y - run.desired_y; |
2311178e | 13507 | |
5f5c8ee5 GM |
13508 | if (run.height) |
13509 | { | |
5f5c8ee5 GM |
13510 | update_begin (f); |
13511 | rif->update_window_begin_hook (w); | |
fa3c6b4d | 13512 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 13513 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 13514 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
13515 | update_end (f); |
13516 | } | |
a2889657 | 13517 | |
5f5c8ee5 GM |
13518 | /* Adjust Y positions of reused rows. */ |
13519 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
da8b7f4f | 13520 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 13521 | max_y = it.last_visible_y; |
b48f74cb | 13522 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
13523 | { |
13524 | row->y -= dy; | |
75c5350a | 13525 | row->visible_height = row->height; |
5f5c8ee5 | 13526 | if (row->y < min_y) |
75c5350a GM |
13527 | row->visible_height -= min_y - row->y; |
13528 | if (row->y + row->height > max_y) | |
13529 | row->visible_height -= row->y + row->height - max_y; | |
88e6b646 | 13530 | row->redraw_fringe_bitmaps_p = 1; |
5f5c8ee5 | 13531 | } |
a2889657 | 13532 | |
5f5c8ee5 GM |
13533 | /* Scroll the current matrix. */ |
13534 | xassert (nrows_scrolled > 0); | |
13535 | rotate_matrix (w->current_matrix, | |
13536 | start_vpos, | |
13537 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
13538 | -nrows_scrolled); | |
13539 | ||
ac90c44f GM |
13540 | /* Disable rows not reused. */ |
13541 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
13542 | row->enabled_p = 0; | |
13543 | ||
38793d6a KS |
13544 | /* Point may have moved to a different line, so we cannot assume that |
13545 | the previous cursor position is valid; locate the correct row. */ | |
13546 | if (pt_row) | |
13547 | { | |
13548 | for (row = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
13549 | row < bottom_row && PT >= MATRIX_ROW_END_CHARPOS (row); | |
13550 | row++) | |
13551 | { | |
13552 | w->cursor.vpos++; | |
13553 | w->cursor.y = row->y; | |
13554 | } | |
13555 | if (row < bottom_row) | |
13556 | { | |
13557 | struct glyph *glyph = row->glyphs[TEXT_AREA] + w->cursor.hpos; | |
13558 | while (glyph->charpos < PT) | |
13559 | { | |
13560 | w->cursor.hpos++; | |
13561 | w->cursor.x += glyph->pixel_width; | |
13562 | glyph++; | |
13563 | } | |
13564 | } | |
13565 | } | |
13566 | ||
5f5c8ee5 GM |
13567 | /* Adjust window end. A null value of last_text_row means that |
13568 | the window end is in reused rows which in turn means that | |
13569 | only its vpos can have changed. */ | |
13570 | if (last_text_row) | |
13571 | { | |
13572 | w->window_end_bytepos | |
13573 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
13574 | w->window_end_pos |
13575 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
13576 | w->window_end_vpos | |
13577 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
13578 | } |
13579 | else | |
a2889657 | 13580 | { |
ac90c44f GM |
13581 | w->window_end_vpos |
13582 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 13583 | } |
2311178e | 13584 | |
5f5c8ee5 GM |
13585 | w->window_end_valid = Qnil; |
13586 | w->desired_matrix->no_scrolling_p = 1; | |
13587 | ||
13588 | #if GLYPH_DEBUG | |
13589 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
13590 | #endif | |
13591 | return 1; | |
a2889657 | 13592 | } |
2311178e | 13593 | |
5f5c8ee5 GM |
13594 | return 0; |
13595 | } | |
a2889657 | 13596 | |
a2889657 | 13597 | |
5f5c8ee5 GM |
13598 | \f |
13599 | /************************************************************************ | |
13600 | Window redisplay reusing current matrix when buffer has changed | |
13601 | ************************************************************************/ | |
13602 | ||
1ec185cb GM |
13603 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
13604 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
13605 | int *, int *)); |
13606 | static struct glyph_row * | |
13607 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
13608 | struct glyph_row *)); | |
13609 | ||
13610 | ||
13611 | /* Return the last row in MATRIX displaying text. If row START is | |
13612 | non-null, start searching with that row. IT gives the dimensions | |
13613 | of the display. Value is null if matrix is empty; otherwise it is | |
13614 | a pointer to the row found. */ | |
13615 | ||
13616 | static struct glyph_row * | |
13617 | find_last_row_displaying_text (matrix, it, start) | |
13618 | struct glyph_matrix *matrix; | |
13619 | struct it *it; | |
13620 | struct glyph_row *start; | |
13621 | { | |
13622 | struct glyph_row *row, *row_found; | |
13623 | ||
13624 | /* Set row_found to the last row in IT->w's current matrix | |
13625 | displaying text. The loop looks funny but think of partially | |
13626 | visible lines. */ | |
13627 | row_found = NULL; | |
13628 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
13629 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
13630 | { | |
13631 | xassert (row->enabled_p); | |
13632 | row_found = row; | |
13633 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
13634 | break; | |
13635 | ++row; | |
a2889657 | 13636 | } |
2311178e | 13637 | |
5f5c8ee5 GM |
13638 | return row_found; |
13639 | } | |
13640 | ||
a2889657 | 13641 | |
5f5c8ee5 | 13642 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
13643 | by changes at the start of current_buffer that occurred since W's |
13644 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 13645 | |
d43fbe9d GM |
13646 | BEG_UNCHANGED us the number of characters unchanged at the start of |
13647 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
13648 | first changed character in current_buffer. Characters at positions < | |
13649 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
13650 | when the current matrix was built. */ | |
5f5c8ee5 GM |
13651 | |
13652 | static struct glyph_row * | |
1ec185cb | 13653 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
13654 | struct window *w; |
13655 | { | |
9142dd5b | 13656 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
13657 | struct glyph_row *row; |
13658 | struct glyph_row *row_found = NULL; | |
13659 | int yb = window_text_bottom_y (w); | |
13660 | ||
13661 | /* Find the last row displaying unchanged text. */ | |
13662 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
13663 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
13664 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 13665 | { |
5f5c8ee5 GM |
13666 | if (/* If row ends before first_changed_pos, it is unchanged, |
13667 | except in some case. */ | |
13668 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
13669 | /* When row ends in ZV and we write at ZV it is not | |
13670 | unchanged. */ | |
13671 | && !row->ends_at_zv_p | |
13672 | /* When first_changed_pos is the end of a continued line, | |
13673 | row is not unchanged because it may be no longer | |
13674 | continued. */ | |
13675 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
88e6b646 KS |
13676 | && (row->continued_p |
13677 | || row->exact_window_width_line_p))) | |
5f5c8ee5 GM |
13678 | row_found = row; |
13679 | ||
13680 | /* Stop if last visible row. */ | |
13681 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
13682 | break; | |
2311178e | 13683 | |
5f5c8ee5 | 13684 | ++row; |
a2889657 JB |
13685 | } |
13686 | ||
5f5c8ee5 | 13687 | return row_found; |
a2889657 | 13688 | } |
5f5c8ee5 GM |
13689 | |
13690 | ||
13691 | /* Find the first glyph row in the current matrix of W that is not | |
2311178e | 13692 | affected by changes at the end of current_buffer since the |
d43fbe9d GM |
13693 | time W's current matrix was built. |
13694 | ||
13695 | Return in *DELTA the number of chars by which buffer positions in | |
13696 | unchanged text at the end of current_buffer must be adjusted. | |
2311178e | 13697 | |
d43fbe9d GM |
13698 | Return in *DELTA_BYTES the corresponding number of bytes. |
13699 | ||
13700 | Value is null if no such row exists, i.e. all rows are affected by | |
13701 | changes. */ | |
2311178e | 13702 | |
5f5c8ee5 | 13703 | static struct glyph_row * |
1ec185cb | 13704 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
13705 | struct window *w; |
13706 | int *delta, *delta_bytes; | |
a2889657 | 13707 | { |
5f5c8ee5 GM |
13708 | struct glyph_row *row; |
13709 | struct glyph_row *row_found = NULL; | |
c581d710 | 13710 | |
5f5c8ee5 | 13711 | *delta = *delta_bytes = 0; |
b2a76982 | 13712 | |
1ec185cb GM |
13713 | /* Display must not have been paused, otherwise the current matrix |
13714 | is not up to date. */ | |
13715 | if (NILP (w->window_end_valid)) | |
13716 | abort (); | |
2311178e | 13717 | |
1ec185cb | 13718 | /* A value of window_end_pos >= END_UNCHANGED means that the window |
5f5c8ee5 GM |
13719 | end is in the range of changed text. If so, there is no |
13720 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 13721 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
13722 | return NULL; |
13723 | ||
13724 | /* Set row to the last row in W's current matrix displaying text. */ | |
13725 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
2311178e TTN |
13726 | |
13727 | /* If matrix is entirely empty, no unchanged row exists. */ | |
5f5c8ee5 GM |
13728 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
13729 | { | |
13730 | /* The value of row is the last glyph row in the matrix having a | |
13731 | meaningful buffer position in it. The end position of row | |
13732 | corresponds to window_end_pos. This allows us to translate | |
13733 | buffer positions in the current matrix to current buffer | |
13734 | positions for characters not in changed text. */ | |
13735 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
13736 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
13737 | int last_unchanged_pos, last_unchanged_pos_old; | |
13738 | struct glyph_row *first_text_row | |
13739 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
13740 | ||
13741 | *delta = Z - Z_old; | |
13742 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
13743 | ||
13744 | /* Set last_unchanged_pos to the buffer position of the last | |
13745 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
13746 | index + 1 of the last character in current_buffer, i.e. by |
13747 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
13748 | unchanged character, and we have to add BEG to get its buffer |
13749 | position. */ | |
9142dd5b | 13750 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 | 13751 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
2311178e | 13752 | |
5f5c8ee5 GM |
13753 | /* Search backward from ROW for a row displaying a line that |
13754 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 13755 | for (; row > first_text_row; --row) |
5f5c8ee5 | 13756 | { |
e10ee30c KS |
13757 | /* This used to abort, but it can happen. |
13758 | It is ok to just stop the search instead here. KFS. */ | |
1ec185cb | 13759 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
e10ee30c | 13760 | break; |
2311178e | 13761 | |
5f5c8ee5 GM |
13762 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) |
13763 | row_found = row; | |
5f5c8ee5 GM |
13764 | } |
13765 | } | |
13766 | ||
1ec185cb GM |
13767 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
13768 | abort (); | |
2311178e | 13769 | |
5f5c8ee5 | 13770 | return row_found; |
c581d710 RS |
13771 | } |
13772 | ||
c581d710 | 13773 | |
5f5c8ee5 GM |
13774 | /* Make sure that glyph rows in the current matrix of window W |
13775 | reference the same glyph memory as corresponding rows in the | |
13776 | frame's frame matrix. This function is called after scrolling W's | |
13777 | current matrix on a terminal frame in try_window_id and | |
13778 | try_window_reusing_current_matrix. */ | |
13779 | ||
13780 | static void | |
13781 | sync_frame_with_window_matrix_rows (w) | |
13782 | struct window *w; | |
c581d710 | 13783 | { |
5f5c8ee5 GM |
13784 | struct frame *f = XFRAME (w->frame); |
13785 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
13786 | ||
13787 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
13788 | must have a frame matrix. */ | |
13789 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
13790 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
13791 | xassert (!FRAME_WINDOW_P (f)); | |
13792 | ||
13793 | /* If W is a full-width window, glyph pointers in W's current matrix | |
13794 | have, by definition, to be the same as glyph pointers in the | |
7d4cc828 GM |
13795 | corresponding frame matrix. Note that frame matrices have no |
13796 | marginal areas (see build_frame_matrix). */ | |
5f5c8ee5 GM |
13797 | window_row = w->current_matrix->rows; |
13798 | window_row_end = window_row + w->current_matrix->nrows; | |
da8b7f4f | 13799 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
5f5c8ee5 | 13800 | while (window_row < window_row_end) |
659a218f | 13801 | { |
7d4cc828 GM |
13802 | struct glyph *start = window_row->glyphs[LEFT_MARGIN_AREA]; |
13803 | struct glyph *end = window_row->glyphs[LAST_AREA]; | |
13804 | ||
13805 | frame_row->glyphs[LEFT_MARGIN_AREA] = start; | |
13806 | frame_row->glyphs[TEXT_AREA] = start; | |
13807 | frame_row->glyphs[RIGHT_MARGIN_AREA] = end; | |
13808 | frame_row->glyphs[LAST_AREA] = end; | |
f002db93 GM |
13809 | |
13810 | /* Disable frame rows whose corresponding window rows have | |
13811 | been disabled in try_window_id. */ | |
13812 | if (!window_row->enabled_p) | |
13813 | frame_row->enabled_p = 0; | |
2311178e | 13814 | |
5f5c8ee5 | 13815 | ++window_row, ++frame_row; |
659a218f | 13816 | } |
a2889657 | 13817 | } |
5f5c8ee5 GM |
13818 | |
13819 | ||
e037b9ec GM |
13820 | /* Find the glyph row in window W containing CHARPOS. Consider all |
13821 | rows between START and END (not inclusive). END null means search | |
13822 | all rows to the end of the display area of W. Value is the row | |
13823 | containing CHARPOS or null. */ | |
13824 | ||
0bef35bc | 13825 | struct glyph_row * |
0df56f4d | 13826 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
13827 | struct window *w; |
13828 | int charpos; | |
13829 | struct glyph_row *start, *end; | |
0df56f4d | 13830 | int dy; |
e037b9ec GM |
13831 | { |
13832 | struct glyph_row *row = start; | |
13833 | int last_y; | |
13834 | ||
13835 | /* If we happen to start on a header-line, skip that. */ | |
13836 | if (row->mode_line_p) | |
13837 | ++row; | |
2311178e | 13838 | |
e037b9ec GM |
13839 | if ((end && row >= end) || !row->enabled_p) |
13840 | return NULL; | |
2311178e | 13841 | |
0df56f4d | 13842 | last_y = window_text_bottom_y (w) - dy; |
2311178e | 13843 | |
5cce13dd RS |
13844 | while (1) |
13845 | { | |
13846 | /* Give up if we have gone too far. */ | |
13847 | if (end && row >= end) | |
13848 | return NULL; | |
40a301b3 RS |
13849 | /* This formerly returned if they were equal. |
13850 | I think that both quantities are of a "last plus one" type; | |
13851 | if so, when they are equal, the row is within the screen. -- rms. */ | |
13852 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y) | |
5cce13dd RS |
13853 | return NULL; |
13854 | ||
13855 | /* If it is in this row, return this row. */ | |
13856 | if (! (MATRIX_ROW_END_CHARPOS (row) < charpos | |
e037b9ec | 13857 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
13858 | /* The end position of a row equals the start |
13859 | position of the next row. If CHARPOS is there, we | |
13860 | would rather display it in the next line, except | |
13861 | when this line ends in ZV. */ | |
13862 | && !row->ends_at_zv_p | |
5cce13dd RS |
13863 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) |
13864 | && charpos >= MATRIX_ROW_START_CHARPOS (row)) | |
13865 | return row; | |
13866 | ++row; | |
13867 | } | |
e037b9ec GM |
13868 | } |
13869 | ||
13870 | ||
5f5c8ee5 GM |
13871 | /* Try to redisplay window W by reusing its existing display. W's |
13872 | current matrix must be up to date when this function is called, | |
13873 | i.e. window_end_valid must not be nil. | |
13874 | ||
13875 | Value is | |
13876 | ||
13877 | 1 if display has been updated | |
13878 | 0 if otherwise unsuccessful | |
13879 | -1 if redisplay with same window start is known not to succeed | |
13880 | ||
13881 | The following steps are performed: | |
13882 | ||
13883 | 1. Find the last row in the current matrix of W that is not | |
13884 | affected by changes at the start of current_buffer. If no such row | |
13885 | is found, give up. | |
13886 | ||
13887 | 2. Find the first row in W's current matrix that is not affected by | |
13888 | changes at the end of current_buffer. Maybe there is no such row. | |
13889 | ||
13890 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
13891 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
13892 | the window. | |
13893 | ||
13894 | 4. If cursor is not known to appear on the window, give up. | |
13895 | ||
13896 | 5. If display stopped at the row found in step 2, scroll the | |
13897 | display and current matrix as needed. | |
13898 | ||
13899 | 6. Maybe display some lines at the end of W, if we must. This can | |
13900 | happen under various circumstances, like a partially visible line | |
13901 | becoming fully visible, or because newly displayed lines are displayed | |
13902 | in smaller font sizes. | |
13903 | ||
13904 | 7. Update W's window end information. */ | |
13905 | ||
12adba34 | 13906 | static int |
5f5c8ee5 | 13907 | try_window_id (w) |
12adba34 | 13908 | struct window *w; |
12adba34 | 13909 | { |
5f5c8ee5 GM |
13910 | struct frame *f = XFRAME (w->frame); |
13911 | struct glyph_matrix *current_matrix = w->current_matrix; | |
13912 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
13913 | struct glyph_row *last_unchanged_at_beg_row; | |
13914 | struct glyph_row *first_unchanged_at_end_row; | |
13915 | struct glyph_row *row; | |
13916 | struct glyph_row *bottom_row; | |
13917 | int bottom_vpos; | |
13918 | struct it it; | |
13919 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
13920 | struct text_pos start_pos; | |
13921 | struct run run; | |
13922 | int first_unchanged_at_end_vpos = 0; | |
13923 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
13924 | struct text_pos start; | |
27d16f05 | 13925 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 13926 | |
69d1f7c9 | 13927 | #if GLYPH_DEBUG |
76cb5e06 GM |
13928 | if (inhibit_try_window_id) |
13929 | return 0; | |
13930 | #endif | |
13931 | ||
27d16f05 GM |
13932 | /* This is handy for debugging. */ |
13933 | #if 0 | |
13934 | #define GIVE_UP(X) \ | |
13935 | do { \ | |
13936 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
13937 | return 0; \ | |
13938 | } while (0) | |
13939 | #else | |
62397849 | 13940 | #define GIVE_UP(X) return 0 |
27d16f05 | 13941 | #endif |
2311178e | 13942 | |
5f5c8ee5 GM |
13943 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
13944 | ||
27d16f05 GM |
13945 | /* Don't use this for mini-windows because these can show |
13946 | messages and mini-buffers, and we don't handle that here. */ | |
13947 | if (MINI_WINDOW_P (w)) | |
13948 | GIVE_UP (1); | |
2311178e | 13949 | |
27d16f05 | 13950 | /* This flag is used to prevent redisplay optimizations. */ |
5fb96e96 | 13951 | if (windows_or_buffers_changed || cursor_type_changed) |
27d16f05 | 13952 | GIVE_UP (2); |
2311178e | 13953 | |
c62c1bb5 RS |
13954 | /* Verify that narrowing has not changed. |
13955 | Also verify that we were not told to prevent redisplay optimizations. | |
13956 | It would be nice to further | |
27d16f05 | 13957 | reduce the number of cases where this prevents try_window_id. */ |
c62c1bb5 RS |
13958 | if (current_buffer->clip_changed |
13959 | || current_buffer->prevent_redisplay_optimizations_p) | |
27d16f05 GM |
13960 | GIVE_UP (3); |
13961 | ||
13962 | /* Window must either use window-based redisplay or be full width. */ | |
13963 | if (!FRAME_WINDOW_P (f) | |
13964 | && (!line_ins_del_ok | |
13965 | || !WINDOW_FULL_WIDTH_P (w))) | |
13966 | GIVE_UP (4); | |
5f5c8ee5 | 13967 | |
f5376658 | 13968 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
13969 | if (PT < CHARPOS (start)) |
13970 | GIVE_UP (5); | |
13971 | ||
13972 | /* Another way to prevent redisplay optimizations. */ | |
13973 | if (XFASTINT (w->last_modified) == 0) | |
13974 | GIVE_UP (6); | |
2311178e | 13975 | |
f5376658 | 13976 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
13977 | if (XFASTINT (w->hscroll) != 0) |
13978 | GIVE_UP (7); | |
2311178e | 13979 | |
f5376658 | 13980 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
13981 | if (NILP (w->window_end_valid)) |
13982 | GIVE_UP (8); | |
2311178e | 13983 | |
27d16f05 GM |
13984 | /* Can't use this if highlighting a region because a cursor movement |
13985 | will do more than just set the cursor. */ | |
13986 | if (!NILP (Vtransient_mark_mode) | |
13987 | && !NILP (current_buffer->mark_active)) | |
13988 | GIVE_UP (9); | |
13989 | ||
13990 | /* Likewise if highlighting trailing whitespace. */ | |
13991 | if (!NILP (Vshow_trailing_whitespace)) | |
13992 | GIVE_UP (11); | |
2311178e | 13993 | |
27d16f05 GM |
13994 | /* Likewise if showing a region. */ |
13995 | if (!NILP (w->region_showing)) | |
13996 | GIVE_UP (10); | |
2311178e | 13997 | |
27d16f05 | 13998 | /* Can use this if overlay arrow position and or string have changed. */ |
351b5434 | 13999 | if (overlay_arrows_changed_p ()) |
27d16f05 GM |
14000 | GIVE_UP (12); |
14001 | ||
2311178e | 14002 | |
5f5c8ee5 GM |
14003 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
14004 | only if buffer has really changed. The reason is that the gap is | |
14005 | initially at Z for freshly visited files. The code below would | |
14006 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
14007 | if (MODIFF > SAVE_MODIFF |
14008 | /* This seems to happen sometimes after saving a buffer. */ | |
14009 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 14010 | { |
9142dd5b GM |
14011 | if (GPT - BEG < BEG_UNCHANGED) |
14012 | BEG_UNCHANGED = GPT - BEG; | |
14013 | if (Z - GPT < END_UNCHANGED) | |
14014 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 14015 | } |
bf9249e3 | 14016 | |
27d16f05 GM |
14017 | /* The position of the first and last character that has been changed. */ |
14018 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
14019 | last_changed_charpos = Z - END_UNCHANGED; | |
14020 | ||
5f5c8ee5 GM |
14021 | /* If window starts after a line end, and the last change is in |
14022 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
14023 | This case happens with stealth-fontification. Note that although |
14024 | the display is unchanged, glyph positions in the matrix have to | |
14025 | be adjusted, of course. */ | |
5f5c8ee5 | 14026 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 14027 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 14028 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 14029 | && CHARPOS (start) == BEGV) |
e60f4527 | 14030 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
14031 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
14032 | { | |
14033 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
14034 | struct glyph_row *r0; | |
14035 | ||
14036 | /* Compute how many chars/bytes have been added to or removed | |
14037 | from the buffer. */ | |
14038 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
14039 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
14040 | delta = Z - Z_old; | |
14041 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
2311178e | 14042 | |
27d16f05 GM |
14043 | /* Give up if PT is not in the window. Note that it already has |
14044 | been checked at the start of try_window_id that PT is not in | |
14045 | front of the window start. */ | |
14046 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
14047 | GIVE_UP (13); | |
14048 | ||
14049 | /* If window start is unchanged, we can reuse the whole matrix | |
14050 | as is, after adjusting glyph positions. No need to compute | |
14051 | the window end again, since its offset from Z hasn't changed. */ | |
14052 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
14053 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
2d031b89 AS |
14054 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes |
14055 | /* PT must not be in a partially visible line. */ | |
14056 | && !(PT >= MATRIX_ROW_START_CHARPOS (row) + delta | |
14057 | && MATRIX_ROW_BOTTOM_Y (row) > window_text_bottom_y (w))) | |
27d16f05 GM |
14058 | { |
14059 | /* Adjust positions in the glyph matrix. */ | |
14060 | if (delta || delta_bytes) | |
14061 | { | |
14062 | struct glyph_row *r1 | |
14063 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
14064 | increment_matrix_positions (w->current_matrix, | |
14065 | MATRIX_ROW_VPOS (r0, current_matrix), | |
14066 | MATRIX_ROW_VPOS (r1, current_matrix), | |
14067 | delta, delta_bytes); | |
14068 | } | |
2311178e | 14069 | |
27d16f05 | 14070 | /* Set the cursor. */ |
0df56f4d | 14071 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
14072 | if (row) |
14073 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
14074 | else |
14075 | abort (); | |
27d16f05 GM |
14076 | return 1; |
14077 | } | |
5f5c8ee5 GM |
14078 | } |
14079 | ||
27d16f05 | 14080 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 14081 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
14082 | be taken if ZV is visible in the window, and text has been added |
14083 | there that is visible in the window. */ | |
14084 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
14085 | /* ZV is not visible in the window, or there are no |
14086 | changes at ZV, actually. */ | |
14087 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
14088 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 14089 | { |
27d16f05 | 14090 | struct glyph_row *r0; |
ef121659 | 14091 | |
27d16f05 GM |
14092 | /* Give up if PT is not in the window. Note that it already has |
14093 | been checked at the start of try_window_id that PT is not in | |
14094 | front of the window start. */ | |
14095 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
14096 | GIVE_UP (14); | |
14097 | ||
14098 | /* If window start is unchanged, we can reuse the whole matrix | |
14099 | as is, without changing glyph positions since no text has | |
14100 | been added/removed in front of the window end. */ | |
14101 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
2d031b89 AS |
14102 | if (TEXT_POS_EQUAL_P (start, r0->start.pos) |
14103 | /* PT must not be in a partially visible line. */ | |
14104 | && !(PT >= MATRIX_ROW_START_CHARPOS (row) | |
14105 | && MATRIX_ROW_BOTTOM_Y (row) > window_text_bottom_y (w))) | |
27d16f05 GM |
14106 | { |
14107 | /* We have to compute the window end anew since text | |
14108 | can have been added/removed after it. */ | |
14109 | w->window_end_pos | |
14110 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
14111 | w->window_end_bytepos | |
14112 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
14113 | ||
14114 | /* Set the cursor. */ | |
0df56f4d | 14115 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
14116 | if (row) |
14117 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
14118 | else |
14119 | abort (); | |
27d16f05 GM |
14120 | return 2; |
14121 | } | |
5f5c8ee5 GM |
14122 | } |
14123 | ||
2b9c25e0 | 14124 | /* Give up if window start is in the changed area. |
2311178e | 14125 | |
2b9c25e0 GM |
14126 | The condition used to read |
14127 | ||
14128 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
14129 | ||
14130 | but why that was tested escapes me at the moment. */ | |
14131 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
14132 | && CHARPOS (start) <= last_changed_charpos) |
14133 | GIVE_UP (15); | |
2311178e | 14134 | |
f5376658 RS |
14135 | /* Check that window start agrees with the start of the first glyph |
14136 | row in its current matrix. Check this after we know the window | |
14137 | start is not in changed text, otherwise positions would not be | |
14138 | comparable. */ | |
27d16f05 | 14139 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 14140 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 14141 | GIVE_UP (16); |
5f5c8ee5 | 14142 | |
23e8bd86 GM |
14143 | /* Give up if the window ends in strings. Overlay strings |
14144 | at the end are difficult to handle, so don't try. */ | |
14145 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
14146 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
14147 | GIVE_UP (20); | |
14148 | ||
5f5c8ee5 GM |
14149 | /* Compute the position at which we have to start displaying new |
14150 | lines. Some of the lines at the top of the window might be | |
14151 | reusable because they are not displaying changed text. Find the | |
14152 | last row in W's current matrix not affected by changes at the | |
14153 | start of current_buffer. Value is null if changes start in the | |
14154 | first line of window. */ | |
1ec185cb | 14155 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
14156 | if (last_unchanged_at_beg_row) |
14157 | { | |
67f1cf4c GM |
14158 | /* Avoid starting to display in the moddle of a character, a TAB |
14159 | for instance. This is easier than to set up the iterator | |
14160 | exactly, and it's not a frequent case, so the additional | |
14161 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
14162 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
14163 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
14164 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
14165 | --last_unchanged_at_beg_row; | |
14166 | ||
14167 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 14168 | GIVE_UP (17); |
47d57b22 GM |
14169 | |
14170 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
14171 | GIVE_UP (18); | |
5f5c8ee5 | 14172 | start_pos = it.current.pos; |
2311178e | 14173 | |
5f5c8ee5 GM |
14174 | /* Start displaying new lines in the desired matrix at the same |
14175 | vpos we would use in the current matrix, i.e. below | |
14176 | last_unchanged_at_beg_row. */ | |
14177 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
14178 | current_matrix); | |
14179 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
14180 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
14181 | ||
14182 | xassert (it.hpos == 0 && it.current_x == 0); | |
14183 | } | |
14184 | else | |
14185 | { | |
14186 | /* There are no reusable lines at the start of the window. | |
3ccb8bcf | 14187 | Start displaying in the first text line. */ |
5f5c8ee5 | 14188 | start_display (&it, w, start); |
3ccb8bcf | 14189 | it.vpos = it.first_vpos; |
5f5c8ee5 GM |
14190 | start_pos = it.current.pos; |
14191 | } | |
14192 | ||
5f5c8ee5 GM |
14193 | /* Find the first row that is not affected by changes at the end of |
14194 | the buffer. Value will be null if there is no unchanged row, in | |
14195 | which case we must redisplay to the end of the window. delta | |
14196 | will be set to the value by which buffer positions beginning with | |
14197 | first_unchanged_at_end_row have to be adjusted due to text | |
14198 | changes. */ | |
14199 | first_unchanged_at_end_row | |
1ec185cb | 14200 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
14201 | IF_DEBUG (debug_delta = delta); |
14202 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
2311178e | 14203 | |
5f5c8ee5 GM |
14204 | /* Set stop_pos to the buffer position up to which we will have to |
14205 | display new lines. If first_unchanged_at_end_row != NULL, this | |
14206 | is the buffer position of the start of the line displayed in that | |
14207 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
14208 | that we don't stop at a buffer position. */ | |
14209 | stop_pos = 0; | |
14210 | if (first_unchanged_at_end_row) | |
14211 | { | |
14212 | xassert (last_unchanged_at_beg_row == NULL | |
14213 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
2311178e | 14214 | |
5f5c8ee5 GM |
14215 | /* If this is a continuation line, move forward to the next one |
14216 | that isn't. Changes in lines above affect this line. | |
14217 | Caution: this may move first_unchanged_at_end_row to a row | |
14218 | not displaying text. */ | |
14219 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
14220 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
14221 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
14222 | < it.last_visible_y)) | |
14223 | ++first_unchanged_at_end_row; | |
14224 | ||
14225 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
14226 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
14227 | >= it.last_visible_y)) | |
14228 | first_unchanged_at_end_row = NULL; | |
14229 | else | |
14230 | { | |
14231 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
14232 | + delta); | |
14233 | first_unchanged_at_end_vpos | |
14234 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 14235 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
14236 | } |
14237 | } | |
14238 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 14239 | GIVE_UP (19); |
5f5c8ee5 GM |
14240 | |
14241 | ||
14242 | #if GLYPH_DEBUG | |
2311178e | 14243 | |
5f5c8ee5 GM |
14244 | /* Either there is no unchanged row at the end, or the one we have |
14245 | now displays text. This is a necessary condition for the window | |
14246 | end pos calculation at the end of this function. */ | |
14247 | xassert (first_unchanged_at_end_row == NULL | |
14248 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
2311178e | 14249 | |
5f5c8ee5 GM |
14250 | debug_last_unchanged_at_beg_vpos |
14251 | = (last_unchanged_at_beg_row | |
14252 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
14253 | : -1); | |
14254 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
2311178e | 14255 | |
5f5c8ee5 GM |
14256 | #endif /* GLYPH_DEBUG != 0 */ |
14257 | ||
2311178e | 14258 | |
5f5c8ee5 GM |
14259 | /* Display new lines. Set last_text_row to the last new line |
14260 | displayed which has text on it, i.e. might end up as being the | |
14261 | line where the window_end_vpos is. */ | |
14262 | w->cursor.vpos = -1; | |
14263 | last_text_row = NULL; | |
14264 | overlay_arrow_seen = 0; | |
14265 | while (it.current_y < it.last_visible_y | |
14266 | && !fonts_changed_p | |
14267 | && (first_unchanged_at_end_row == NULL | |
14268 | || IT_CHARPOS (it) < stop_pos)) | |
14269 | { | |
14270 | if (display_line (&it)) | |
14271 | last_text_row = it.glyph_row - 1; | |
14272 | } | |
14273 | ||
14274 | if (fonts_changed_p) | |
14275 | return -1; | |
14276 | ||
14277 | ||
14278 | /* Compute differences in buffer positions, y-positions etc. for | |
14279 | lines reused at the bottom of the window. Compute what we can | |
14280 | scroll. */ | |
ca42b2e8 GM |
14281 | if (first_unchanged_at_end_row |
14282 | /* No lines reused because we displayed everything up to the | |
14283 | bottom of the window. */ | |
14284 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
14285 | { |
14286 | dvpos = (it.vpos | |
14287 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
14288 | current_matrix)); | |
14289 | dy = it.current_y - first_unchanged_at_end_row->y; | |
14290 | run.current_y = first_unchanged_at_end_row->y; | |
14291 | run.desired_y = run.current_y + dy; | |
14292 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
14293 | } | |
14294 | else | |
ca42b2e8 GM |
14295 | { |
14296 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
14297 | first_unchanged_at_end_row = NULL; | |
14298 | } | |
5f5c8ee5 GM |
14299 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
14300 | ||
8f8ba186 | 14301 | |
5f5c8ee5 GM |
14302 | /* Find the cursor if not already found. We have to decide whether |
14303 | PT will appear on this window (it sometimes doesn't, but this is | |
14304 | not a very frequent case.) This decision has to be made before | |
14305 | the current matrix is altered. A value of cursor.vpos < 0 means | |
14306 | that PT is either in one of the lines beginning at | |
14307 | first_unchanged_at_end_row or below the window. Don't care for | |
14308 | lines that might be displayed later at the window end; as | |
14309 | mentioned, this is not a frequent case. */ | |
14310 | if (w->cursor.vpos < 0) | |
14311 | { | |
5f5c8ee5 GM |
14312 | /* Cursor in unchanged rows at the top? */ |
14313 | if (PT < CHARPOS (start_pos) | |
14314 | && last_unchanged_at_beg_row) | |
14315 | { | |
e037b9ec GM |
14316 | row = row_containing_pos (w, PT, |
14317 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 14318 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
14319 | if (row) |
14320 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
14321 | } |
14322 | ||
14323 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
14324 | else if (first_unchanged_at_end_row) | |
14325 | { | |
e037b9ec | 14326 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 14327 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 14328 | if (row) |
468155d7 GM |
14329 | set_cursor_from_row (w, row, w->current_matrix, delta, |
14330 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
14331 | } |
14332 | ||
14333 | /* Give up if cursor was not found. */ | |
14334 | if (w->cursor.vpos < 0) | |
14335 | { | |
14336 | clear_glyph_matrix (w->desired_matrix); | |
14337 | return -1; | |
14338 | } | |
14339 | } | |
2311178e | 14340 | |
5f5c8ee5 GM |
14341 | /* Don't let the cursor end in the scroll margins. */ |
14342 | { | |
14343 | int this_scroll_margin, cursor_height; | |
2311178e | 14344 | |
5f5c8ee5 | 14345 | this_scroll_margin = max (0, scroll_margin); |
da8b7f4f KS |
14346 | this_scroll_margin = min (this_scroll_margin, WINDOW_TOTAL_LINES (w) / 4); |
14347 | this_scroll_margin *= FRAME_LINE_HEIGHT (it.f); | |
5f5c8ee5 | 14348 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; |
2311178e | 14349 | |
5f5c8ee5 GM |
14350 | if ((w->cursor.y < this_scroll_margin |
14351 | && CHARPOS (start) > BEGV) | |
38793d6a KS |
14352 | /* Old redisplay didn't take scroll margin into account at the bottom, |
14353 | but then global-hl-line-mode doesn't scroll. KFS 2004-06-14 */ | |
8232c913 KS |
14354 | || (w->cursor.y + (make_cursor_line_fully_visible_p |
14355 | ? cursor_height + this_scroll_margin | |
14356 | : 1)) > it.last_visible_y) | |
5f5c8ee5 GM |
14357 | { |
14358 | w->cursor.vpos = -1; | |
14359 | clear_glyph_matrix (w->desired_matrix); | |
14360 | return -1; | |
14361 | } | |
14362 | } | |
14363 | ||
14364 | /* Scroll the display. Do it before changing the current matrix so | |
14365 | that xterm.c doesn't get confused about where the cursor glyph is | |
14366 | found. */ | |
fa77249f | 14367 | if (dy && run.height) |
5f5c8ee5 GM |
14368 | { |
14369 | update_begin (f); | |
2311178e | 14370 | |
5f5c8ee5 GM |
14371 | if (FRAME_WINDOW_P (f)) |
14372 | { | |
14373 | rif->update_window_begin_hook (w); | |
fa3c6b4d | 14374 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 14375 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 14376 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
14377 | } |
14378 | else | |
14379 | { | |
14380 | /* Terminal frame. In this case, dvpos gives the number of | |
14381 | lines to scroll by; dvpos < 0 means scroll up. */ | |
14382 | int first_unchanged_at_end_vpos | |
14383 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
da8b7f4f KS |
14384 | int from = WINDOW_TOP_EDGE_LINE (w) + first_unchanged_at_end_vpos; |
14385 | int end = (WINDOW_TOP_EDGE_LINE (w) | |
522ed7fb GM |
14386 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) |
14387 | + window_internal_height (w)); | |
2311178e | 14388 | |
5f5c8ee5 GM |
14389 | /* Perform the operation on the screen. */ |
14390 | if (dvpos > 0) | |
14391 | { | |
14392 | /* Scroll last_unchanged_at_beg_row to the end of the | |
14393 | window down dvpos lines. */ | |
14394 | set_terminal_window (end); | |
14395 | ||
14396 | /* On dumb terminals delete dvpos lines at the end | |
14397 | before inserting dvpos empty lines. */ | |
14398 | if (!scroll_region_ok) | |
14399 | ins_del_lines (end - dvpos, -dvpos); | |
14400 | ||
14401 | /* Insert dvpos empty lines in front of | |
14402 | last_unchanged_at_beg_row. */ | |
14403 | ins_del_lines (from, dvpos); | |
14404 | } | |
14405 | else if (dvpos < 0) | |
14406 | { | |
14407 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
14408 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
14409 | set_terminal_window (end); | |
14410 | ||
14411 | /* Delete dvpos lines in front of | |
14412 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
14413 | the cursor to the given vpos and emit |dvpos| delete | |
14414 | line sequences. */ | |
14415 | ins_del_lines (from + dvpos, dvpos); | |
14416 | ||
14417 | /* On a dumb terminal insert dvpos empty lines at the | |
14418 | end. */ | |
14419 | if (!scroll_region_ok) | |
14420 | ins_del_lines (end + dvpos, -dvpos); | |
14421 | } | |
2311178e | 14422 | |
5f5c8ee5 GM |
14423 | set_terminal_window (0); |
14424 | } | |
2311178e | 14425 | |
5f5c8ee5 GM |
14426 | update_end (f); |
14427 | } | |
14428 | ||
ca42b2e8 GM |
14429 | /* Shift reused rows of the current matrix to the right position. |
14430 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
14431 | text. */ | |
14432 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
14433 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
14434 | if (dvpos < 0) |
14435 | { | |
14436 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
14437 | bottom_vpos, dvpos); | |
14438 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
14439 | bottom_vpos, 0); | |
14440 | } | |
14441 | else if (dvpos > 0) | |
14442 | { | |
14443 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
14444 | bottom_vpos, dvpos); | |
14445 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
14446 | first_unchanged_at_end_vpos + dvpos, 0); | |
14447 | } | |
14448 | ||
14449 | /* For frame-based redisplay, make sure that current frame and window | |
14450 | matrix are in sync with respect to glyph memory. */ | |
14451 | if (!FRAME_WINDOW_P (f)) | |
14452 | sync_frame_with_window_matrix_rows (w); | |
14453 | ||
14454 | /* Adjust buffer positions in reused rows. */ | |
14455 | if (delta) | |
f2d86d7a GM |
14456 | increment_matrix_positions (current_matrix, |
14457 | first_unchanged_at_end_vpos + dvpos, | |
14458 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
14459 | |
14460 | /* Adjust Y positions. */ | |
14461 | if (dy) | |
14462 | shift_glyph_matrix (w, current_matrix, | |
14463 | first_unchanged_at_end_vpos + dvpos, | |
14464 | bottom_vpos, dy); | |
14465 | ||
14466 | if (first_unchanged_at_end_row) | |
f1deb763 KS |
14467 | { |
14468 | first_unchanged_at_end_row += dvpos; | |
14469 | if (first_unchanged_at_end_row->y >= it.last_visible_y | |
14470 | || !MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)) | |
14471 | first_unchanged_at_end_row = NULL; | |
14472 | } | |
5f5c8ee5 GM |
14473 | |
14474 | /* If scrolling up, there may be some lines to display at the end of | |
14475 | the window. */ | |
14476 | last_text_row_at_end = NULL; | |
14477 | if (dy < 0) | |
14478 | { | |
9c6ba6d1 GM |
14479 | /* Scrolling up can leave for example a partially visible line |
14480 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
14481 | /* Set last_row to the glyph row in the current matrix where the |
14482 | window end line is found. It has been moved up or down in | |
14483 | the matrix by dvpos. */ | |
14484 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
14485 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
14486 | ||
14487 | /* If last_row is the window end line, it should display text. */ | |
14488 | xassert (last_row->displays_text_p); | |
14489 | ||
14490 | /* If window end line was partially visible before, begin | |
14491 | displaying at that line. Otherwise begin displaying with the | |
14492 | line following it. */ | |
14493 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
14494 | { | |
14495 | init_to_row_start (&it, w, last_row); | |
14496 | it.vpos = last_vpos; | |
14497 | it.current_y = last_row->y; | |
14498 | } | |
14499 | else | |
14500 | { | |
14501 | init_to_row_end (&it, w, last_row); | |
14502 | it.vpos = 1 + last_vpos; | |
14503 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
14504 | ++last_row; | |
14505 | } | |
12adba34 | 14506 | |
23e8bd86 GM |
14507 | /* We may start in a continuation line. If so, we have to |
14508 | get the right continuation_lines_width and current_x. */ | |
14509 | it.continuation_lines_width = last_row->continuation_lines_width; | |
14510 | it.hpos = it.current_x = 0; | |
2311178e | 14511 | |
23e8bd86 GM |
14512 | /* Display the rest of the lines at the window end. */ |
14513 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
14514 | while (it.current_y < it.last_visible_y | |
14515 | && !fonts_changed_p) | |
5f5c8ee5 | 14516 | { |
23e8bd86 GM |
14517 | /* Is it always sure that the display agrees with lines in |
14518 | the current matrix? I don't think so, so we mark rows | |
14519 | displayed invalid in the current matrix by setting their | |
14520 | enabled_p flag to zero. */ | |
14521 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
14522 | if (display_line (&it)) | |
14523 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
14524 | } |
14525 | } | |
12adba34 | 14526 | |
5f5c8ee5 GM |
14527 | /* Update window_end_pos and window_end_vpos. */ |
14528 | if (first_unchanged_at_end_row | |
5f5c8ee5 GM |
14529 | && !last_text_row_at_end) |
14530 | { | |
14531 | /* Window end line if one of the preserved rows from the current | |
14532 | matrix. Set row to the last row displaying text in current | |
14533 | matrix starting at first_unchanged_at_end_row, after | |
14534 | scrolling. */ | |
14535 | xassert (first_unchanged_at_end_row->displays_text_p); | |
14536 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
14537 | first_unchanged_at_end_row); | |
14538 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
2311178e | 14539 | |
ac90c44f | 14540 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 14541 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
14542 | w->window_end_vpos |
14543 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 14544 | xassert (w->window_end_bytepos >= 0); |
0416532f | 14545 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
14546 | } |
14547 | else if (last_text_row_at_end) | |
14548 | { | |
ac90c44f GM |
14549 | w->window_end_pos |
14550 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
14551 | w->window_end_bytepos |
14552 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
14553 | w->window_end_vpos |
14554 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 14555 | xassert (w->window_end_bytepos >= 0); |
0416532f | 14556 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
14557 | } |
14558 | else if (last_text_row) | |
14559 | { | |
14560 | /* We have displayed either to the end of the window or at the | |
14561 | end of the window, i.e. the last row with text is to be found | |
14562 | in the desired matrix. */ | |
ac90c44f GM |
14563 | w->window_end_pos |
14564 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
14565 | w->window_end_bytepos |
14566 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
14567 | w->window_end_vpos |
14568 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 14569 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
14570 | } |
14571 | else if (first_unchanged_at_end_row == NULL | |
14572 | && last_text_row == NULL | |
14573 | && last_text_row_at_end == NULL) | |
14574 | { | |
14575 | /* Displayed to end of window, but no line containing text was | |
14576 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
14577 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
14578 | int vpos = XFASTINT (w->window_end_vpos); | |
14579 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
14580 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
14581 | ||
14582 | for (row = NULL; | |
14583 | row == NULL && vpos >= first_vpos; | |
14584 | --vpos, --current_row, --desired_row) | |
14585 | { | |
14586 | if (desired_row->enabled_p) | |
14587 | { | |
14588 | if (desired_row->displays_text_p) | |
14589 | row = desired_row; | |
14590 | } | |
14591 | else if (current_row->displays_text_p) | |
14592 | row = current_row; | |
14593 | } | |
12adba34 | 14594 | |
0416532f | 14595 | xassert (row != NULL); |
d88a79d4 | 14596 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
14597 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
14598 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 14599 | xassert (w->window_end_bytepos >= 0); |
0416532f | 14600 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
14601 | } |
14602 | else | |
14603 | abort (); | |
ac90c44f | 14604 | |
8cdb267e GM |
14605 | #if 0 /* This leads to problems, for instance when the cursor is |
14606 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
14607 | /* Disable rows below what's displayed in the window. This makes |
14608 | debugging easier. */ | |
14609 | enable_glyph_matrix_rows (current_matrix, | |
14610 | XFASTINT (w->window_end_vpos) + 1, | |
14611 | bottom_vpos, 0); | |
8cdb267e | 14612 | #endif |
23e8bd86 | 14613 | |
5f5c8ee5 GM |
14614 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
14615 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 14616 | |
5f5c8ee5 GM |
14617 | /* Record that display has not been completed. */ |
14618 | w->window_end_valid = Qnil; | |
14619 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 14620 | return 3; |
27d16f05 GM |
14621 | |
14622 | #undef GIVE_UP | |
12adba34 | 14623 | } |
0f9c0ff0 | 14624 | |
a2889657 | 14625 | |
5f5c8ee5 GM |
14626 | \f |
14627 | /*********************************************************************** | |
14628 | More debugging support | |
14629 | ***********************************************************************/ | |
a2889657 | 14630 | |
5f5c8ee5 | 14631 | #if GLYPH_DEBUG |
a2889657 | 14632 | |
eaaa65b0 | 14633 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 14634 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 14635 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 14636 | |
31b24551 | 14637 | |
9ab436b9 | 14638 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 14639 | |
9ab436b9 GM |
14640 | GLYPHS 0 means don't show glyph contents. |
14641 | GLYPHS 1 means show glyphs in short form | |
14642 | GLYPHS > 1 means show glyphs in long form. */ | |
14643 | ||
14644 | void | |
14645 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 14646 | struct glyph_matrix *matrix; |
9ab436b9 | 14647 | int glyphs; |
5f5c8ee5 | 14648 | { |
efc63ef0 | 14649 | int i; |
5f5c8ee5 | 14650 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 14651 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 14652 | } |
31b24551 | 14653 | |
68a37fa8 | 14654 | |
e187cf71 GM |
14655 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
14656 | the glyph row and area where the glyph comes from. */ | |
14657 | ||
14658 | void | |
14659 | dump_glyph (row, glyph, area) | |
14660 | struct glyph_row *row; | |
14661 | struct glyph *glyph; | |
14662 | int area; | |
14663 | { | |
14664 | if (glyph->type == CHAR_GLYPH) | |
14665 | { | |
14666 | fprintf (stderr, | |
14667 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
14668 | glyph - row->glyphs[TEXT_AREA], | |
14669 | 'C', | |
14670 | glyph->charpos, | |
14671 | (BUFFERP (glyph->object) | |
14672 | ? 'B' | |
14673 | : (STRINGP (glyph->object) | |
14674 | ? 'S' | |
14675 | : '-')), | |
14676 | glyph->pixel_width, | |
14677 | glyph->u.ch, | |
14678 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
14679 | ? glyph->u.ch | |
14680 | : '.'), | |
14681 | glyph->face_id, | |
14682 | glyph->left_box_line_p, | |
14683 | glyph->right_box_line_p); | |
14684 | } | |
14685 | else if (glyph->type == STRETCH_GLYPH) | |
14686 | { | |
14687 | fprintf (stderr, | |
14688 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
14689 | glyph - row->glyphs[TEXT_AREA], | |
14690 | 'S', | |
14691 | glyph->charpos, | |
14692 | (BUFFERP (glyph->object) | |
14693 | ? 'B' | |
14694 | : (STRINGP (glyph->object) | |
14695 | ? 'S' | |
14696 | : '-')), | |
14697 | glyph->pixel_width, | |
14698 | 0, | |
14699 | '.', | |
14700 | glyph->face_id, | |
14701 | glyph->left_box_line_p, | |
14702 | glyph->right_box_line_p); | |
14703 | } | |
14704 | else if (glyph->type == IMAGE_GLYPH) | |
14705 | { | |
14706 | fprintf (stderr, | |
14707 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
14708 | glyph - row->glyphs[TEXT_AREA], | |
14709 | 'I', | |
14710 | glyph->charpos, | |
14711 | (BUFFERP (glyph->object) | |
14712 | ? 'B' | |
14713 | : (STRINGP (glyph->object) | |
14714 | ? 'S' | |
14715 | : '-')), | |
14716 | glyph->pixel_width, | |
14717 | glyph->u.img_id, | |
14718 | '.', | |
14719 | glyph->face_id, | |
14720 | glyph->left_box_line_p, | |
14721 | glyph->right_box_line_p); | |
14722 | } | |
14723 | } | |
14724 | ||
14725 | ||
5f5c8ee5 | 14726 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
14727 | GLYPHS 0 means don't show glyph contents. |
14728 | GLYPHS 1 means show glyphs in short form | |
14729 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 14730 | |
5f5c8ee5 | 14731 | void |
eaaa65b0 GM |
14732 | dump_glyph_row (row, vpos, glyphs) |
14733 | struct glyph_row *row; | |
9ab436b9 | 14734 | int vpos, glyphs; |
5f5c8ee5 | 14735 | { |
9ab436b9 GM |
14736 | if (glyphs != 1) |
14737 | { | |
e235145c MB |
14738 | fprintf (stderr, "Row Start End Used oEI><\\CTZFesm X Y W H V A P\n"); |
14739 | fprintf (stderr, "======================================================================\n"); | |
2311178e | 14740 | |
e235145c | 14741 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 14742 | %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d %4d %4d %4d %4d\n", |
eaaa65b0 | 14743 | vpos, |
9ab436b9 GM |
14744 | MATRIX_ROW_START_CHARPOS (row), |
14745 | MATRIX_ROW_END_CHARPOS (row), | |
14746 | row->used[TEXT_AREA], | |
14747 | row->contains_overlapping_glyphs_p, | |
14748 | row->enabled_p, | |
9ab436b9 GM |
14749 | row->truncated_on_left_p, |
14750 | row->truncated_on_right_p, | |
9ab436b9 GM |
14751 | row->continued_p, |
14752 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
14753 | row->displays_text_p, | |
14754 | row->ends_at_zv_p, | |
14755 | row->fill_line_p, | |
14756 | row->ends_in_middle_of_char_p, | |
14757 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 14758 | row->mouse_face_p, |
9ab436b9 GM |
14759 | row->x, |
14760 | row->y, | |
14761 | row->pixel_width, | |
14762 | row->height, | |
14763 | row->visible_height, | |
14764 | row->ascent, | |
14765 | row->phys_ascent); | |
33ea6c4d GM |
14766 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
14767 | row->end.overlay_string_index, | |
14768 | row->continuation_lines_width); | |
9ab436b9 GM |
14769 | fprintf (stderr, "%9d %5d\n", |
14770 | CHARPOS (row->start.string_pos), | |
14771 | CHARPOS (row->end.string_pos)); | |
14772 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
14773 | row->end.dpvec_index); | |
14774 | } | |
2311178e | 14775 | |
9ab436b9 | 14776 | if (glyphs > 1) |
bd66d1ba | 14777 | { |
e187cf71 GM |
14778 | int area; |
14779 | ||
14780 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
14781 | { | |
091f8878 GM |
14782 | struct glyph *glyph = row->glyphs[area]; |
14783 | struct glyph *glyph_end = glyph + row->used[area]; | |
2311178e | 14784 | |
e187cf71 | 14785 | /* Glyph for a line end in text. */ |
091f8878 | 14786 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 14787 | ++glyph_end; |
2311178e | 14788 | |
e187cf71 GM |
14789 | if (glyph < glyph_end) |
14790 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
2311178e | 14791 | |
e187cf71 GM |
14792 | for (; glyph < glyph_end; ++glyph) |
14793 | dump_glyph (row, glyph, area); | |
f7b4b63a | 14794 | } |
f4faa47c | 14795 | } |
9ab436b9 GM |
14796 | else if (glyphs == 1) |
14797 | { | |
e187cf71 | 14798 | int area; |
9ab436b9 | 14799 | |
e187cf71 | 14800 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 14801 | { |
e187cf71 GM |
14802 | char *s = (char *) alloca (row->used[area] + 1); |
14803 | int i; | |
14804 | ||
14805 | for (i = 0; i < row->used[area]; ++i) | |
14806 | { | |
14807 | struct glyph *glyph = row->glyphs[area] + i; | |
14808 | if (glyph->type == CHAR_GLYPH | |
14809 | && glyph->u.ch < 0x80 | |
14810 | && glyph->u.ch >= ' ') | |
14811 | s[i] = glyph->u.ch; | |
14812 | else | |
14813 | s[i] = '.'; | |
14814 | } | |
2311178e | 14815 | |
e187cf71 GM |
14816 | s[i] = '\0'; |
14817 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
14818 | } | |
9ab436b9 | 14819 | } |
5f5c8ee5 | 14820 | } |
f4faa47c | 14821 | |
a2889657 | 14822 | |
5f5c8ee5 GM |
14823 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
14824 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 14825 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
14826 | Shows contents of glyph row structures. With non-nil |
14827 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
14828 | glyphs in short form, otherwise show glyphs in long form. */) |
14829 | (glyphs) | |
9ab436b9 | 14830 | Lisp_Object glyphs; |
5f5c8ee5 GM |
14831 | { |
14832 | struct window *w = XWINDOW (selected_window); | |
14833 | struct buffer *buffer = XBUFFER (w->buffer); | |
14834 | ||
14835 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
14836 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
14837 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
14838 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
14839 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
14840 | dump_glyph_matrix (w->current_matrix, |
14841 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
14842 | return Qnil; |
14843 | } | |
1c2250c2 | 14844 | |
1fca3fae | 14845 | |
7d4cc828 GM |
14846 | DEFUN ("dump-frame-glyph-matrix", Fdump_frame_glyph_matrix, |
14847 | Sdump_frame_glyph_matrix, 0, 0, "", doc: /* */) | |
14848 | () | |
14849 | { | |
14850 | struct frame *f = XFRAME (selected_frame); | |
14851 | dump_glyph_matrix (f->current_matrix, 1); | |
14852 | return Qnil; | |
14853 | } | |
14854 | ||
14855 | ||
e9abc296 | 14856 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 14857 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
14858 | GLYPH 0 means don't dump glyphs. |
14859 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
14860 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
14861 | (row, glyphs) | |
e9abc296 | 14862 | Lisp_Object row, glyphs; |
5f5c8ee5 | 14863 | { |
eaaa65b0 GM |
14864 | struct glyph_matrix *matrix; |
14865 | int vpos; | |
2311178e | 14866 | |
b7826503 | 14867 | CHECK_NUMBER (row); |
eaaa65b0 GM |
14868 | matrix = XWINDOW (selected_window)->current_matrix; |
14869 | vpos = XINT (row); | |
14870 | if (vpos >= 0 && vpos < matrix->nrows) | |
14871 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
14872 | vpos, | |
14873 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
14874 | return Qnil; |
14875 | } | |
1fca3fae | 14876 | |
67481ae5 | 14877 | |
b94c0d9c | 14878 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 14879 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
14880 | GLYPH 0 means don't dump glyphs. |
14881 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
14882 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
14883 | (row, glyphs) | |
b94c0d9c | 14884 | Lisp_Object row, glyphs; |
5f5c8ee5 | 14885 | { |
886bd6f2 | 14886 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
14887 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
14888 | int vpos; | |
2311178e | 14889 | |
b7826503 | 14890 | CHECK_NUMBER (row); |
eaaa65b0 GM |
14891 | vpos = XINT (row); |
14892 | if (vpos >= 0 && vpos < m->nrows) | |
14893 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
14894 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
14895 | return Qnil; |
14896 | } | |
ca26e1c8 | 14897 | |
0f9c0ff0 | 14898 | |
62397849 | 14899 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
14900 | doc: /* Toggle tracing of redisplay. |
14901 | With ARG, turn tracing on if and only if ARG is positive. */) | |
14902 | (arg) | |
62397849 | 14903 | Lisp_Object arg; |
5f5c8ee5 | 14904 | { |
62397849 GM |
14905 | if (NILP (arg)) |
14906 | trace_redisplay_p = !trace_redisplay_p; | |
14907 | else | |
14908 | { | |
14909 | arg = Fprefix_numeric_value (arg); | |
14910 | trace_redisplay_p = XINT (arg) > 0; | |
14911 | } | |
2311178e | 14912 | |
5f5c8ee5 GM |
14913 | return Qnil; |
14914 | } | |
bf9249e3 GM |
14915 | |
14916 | ||
f4a374a1 | 14917 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
e9757d41 SM |
14918 | doc: /* Like `format', but print result to stderr. |
14919 | usage: (trace-to-stderr STRING &rest OBJECTS) */) | |
7ee72033 | 14920 | (nargs, args) |
f4a374a1 GM |
14921 | int nargs; |
14922 | Lisp_Object *args; | |
bf9249e3 | 14923 | { |
f4a374a1 | 14924 | Lisp_Object s = Fformat (nargs, args); |
2051c264 | 14925 | fprintf (stderr, "%s", SDATA (s)); |
bf9249e3 GM |
14926 | return Qnil; |
14927 | } | |
2311178e | 14928 | |
5f5c8ee5 | 14929 | #endif /* GLYPH_DEBUG */ |
ca26e1c8 | 14930 | |
ca26e1c8 | 14931 | |
5f5c8ee5 GM |
14932 | \f |
14933 | /*********************************************************************** | |
14934 | Building Desired Matrix Rows | |
14935 | ***********************************************************************/ | |
a2889657 | 14936 | |
c514efbb KS |
14937 | /* Return a temporary glyph row holding the glyphs of an overlay arrow. |
14938 | Used for non-window-redisplay windows, and for windows w/o left fringe. */ | |
ca26e1c8 | 14939 | |
5f5c8ee5 | 14940 | static struct glyph_row * |
351b5434 | 14941 | get_overlay_arrow_glyph_row (w, overlay_arrow_string) |
5f5c8ee5 | 14942 | struct window *w; |
351b5434 | 14943 | Lisp_Object overlay_arrow_string; |
5f5c8ee5 GM |
14944 | { |
14945 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
14946 | struct buffer *buffer = XBUFFER (w->buffer); | |
14947 | struct buffer *old = current_buffer; | |
351b5434 KS |
14948 | const unsigned char *arrow_string = SDATA (overlay_arrow_string); |
14949 | int arrow_len = SCHARS (overlay_arrow_string); | |
50f80c2f KR |
14950 | const unsigned char *arrow_end = arrow_string + arrow_len; |
14951 | const unsigned char *p; | |
5f5c8ee5 GM |
14952 | struct it it; |
14953 | int multibyte_p; | |
14954 | int n_glyphs_before; | |
14955 | ||
14956 | set_buffer_temp (buffer); | |
14957 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
14958 | it.glyph_row->used[TEXT_AREA] = 0; | |
14959 | SET_TEXT_POS (it.position, 0, 0); | |
14960 | ||
14961 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
14962 | p = arrow_string; | |
14963 | while (p < arrow_end) | |
14964 | { | |
14965 | Lisp_Object face, ilisp; | |
2311178e | 14966 | |
5f5c8ee5 GM |
14967 | /* Get the next character. */ |
14968 | if (multibyte_p) | |
4fdb80f2 | 14969 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
14970 | else |
14971 | it.c = *p, it.len = 1; | |
14972 | p += it.len; | |
2311178e | 14973 | |
5f5c8ee5 | 14974 | /* Get its face. */ |
ac90c44f | 14975 | ilisp = make_number (p - arrow_string); |
351b5434 | 14976 | face = Fget_text_property (ilisp, Qface, overlay_arrow_string); |
5f5c8ee5 GM |
14977 | it.face_id = compute_char_face (f, it.c, face); |
14978 | ||
14979 | /* Compute its width, get its glyphs. */ | |
14980 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 14981 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
14982 | PRODUCE_GLYPHS (&it); |
14983 | ||
14984 | /* If this character doesn't fit any more in the line, we have | |
14985 | to remove some glyphs. */ | |
14986 | if (it.current_x > it.last_visible_x) | |
14987 | { | |
14988 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
14989 | break; | |
14990 | } | |
14991 | } | |
2311178e | 14992 | |
5f5c8ee5 GM |
14993 | set_buffer_temp (old); |
14994 | return it.glyph_row; | |
14995 | } | |
ca26e1c8 | 14996 | |
b0a0fbda | 14997 | |
5f5c8ee5 GM |
14998 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
14999 | glyphs are only inserted for terminal frames since we can't really | |
15000 | win with truncation glyphs when partially visible glyphs are | |
15001 | involved. Which glyphs to insert is determined by | |
15002 | produce_special_glyphs. */ | |
67481ae5 | 15003 | |
5f5c8ee5 GM |
15004 | static void |
15005 | insert_left_trunc_glyphs (it) | |
15006 | struct it *it; | |
15007 | { | |
15008 | struct it truncate_it; | |
15009 | struct glyph *from, *end, *to, *toend; | |
15010 | ||
15011 | xassert (!FRAME_WINDOW_P (it->f)); | |
15012 | ||
15013 | /* Get the truncation glyphs. */ | |
15014 | truncate_it = *it; | |
5f5c8ee5 GM |
15015 | truncate_it.current_x = 0; |
15016 | truncate_it.face_id = DEFAULT_FACE_ID; | |
15017 | truncate_it.glyph_row = &scratch_glyph_row; | |
15018 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
15019 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 15020 | truncate_it.object = make_number (0); |
5f5c8ee5 | 15021 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
2311178e | 15022 | |
5f5c8ee5 GM |
15023 | /* Overwrite glyphs from IT with truncation glyphs. */ |
15024 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
15025 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
15026 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
15027 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
15028 | ||
15029 | while (from < end) | |
15030 | *to++ = *from++; | |
15031 | ||
37be86f2 KH |
15032 | /* There may be padding glyphs left over. Overwrite them too. */ |
15033 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
15034 | { | |
15035 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
15036 | while (from < end) | |
15037 | *to++ = *from++; | |
15038 | } | |
5f5c8ee5 | 15039 | |
37be86f2 KH |
15040 | if (to > toend) |
15041 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 15042 | } |
e0bfbde6 | 15043 | |
e0bfbde6 | 15044 | |
5f5c8ee5 | 15045 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 15046 | |
5f5c8ee5 GM |
15047 | Most of the time, ascent and height of a display line will be equal |
15048 | to the max_ascent and max_height values of the display iterator | |
15049 | structure. This is not the case if | |
67481ae5 | 15050 | |
5f5c8ee5 GM |
15051 | 1. We hit ZV without displaying anything. In this case, max_ascent |
15052 | and max_height will be zero. | |
1c9241f5 | 15053 | |
5f5c8ee5 GM |
15054 | 2. We have some glyphs that don't contribute to the line height. |
15055 | (The glyph row flag contributes_to_line_height_p is for future | |
15056 | pixmap extensions). | |
f6fd109b | 15057 | |
5f5c8ee5 GM |
15058 | The first case is easily covered by using default values because in |
15059 | these cases, the line height does not really matter, except that it | |
15060 | must not be zero. */ | |
67481ae5 | 15061 | |
5f5c8ee5 GM |
15062 | static void |
15063 | compute_line_metrics (it) | |
15064 | struct it *it; | |
15065 | { | |
15066 | struct glyph_row *row = it->glyph_row; | |
15067 | int area, i; | |
1c2250c2 | 15068 | |
5f5c8ee5 GM |
15069 | if (FRAME_WINDOW_P (it->f)) |
15070 | { | |
75c5350a | 15071 | int i, min_y, max_y; |
1c2250c2 | 15072 | |
5f5c8ee5 GM |
15073 | /* The line may consist of one space only, that was added to |
15074 | place the cursor on it. If so, the row's height hasn't been | |
15075 | computed yet. */ | |
15076 | if (row->height == 0) | |
15077 | { | |
15078 | if (it->max_ascent + it->max_descent == 0) | |
da8b7f4f | 15079 | it->max_descent = it->max_phys_descent = FRAME_LINE_HEIGHT (it->f); |
5f5c8ee5 GM |
15080 | row->ascent = it->max_ascent; |
15081 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
15082 | row->phys_ascent = it->max_phys_ascent; |
15083 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
546f98b8 | 15084 | row->extra_line_spacing = it->max_extra_line_spacing; |
5f5c8ee5 | 15085 | } |
2311178e | 15086 | |
5f5c8ee5 GM |
15087 | /* Compute the width of this line. */ |
15088 | row->pixel_width = row->x; | |
15089 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
15090 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
15091 | ||
15092 | xassert (row->pixel_width >= 0); | |
15093 | xassert (row->ascent >= 0 && row->height > 0); | |
15094 | ||
312246d1 GM |
15095 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
15096 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
15097 | ||
15098 | /* If first line's physical ascent is larger than its logical | |
15099 | ascent, use the physical ascent, and make the row taller. | |
15100 | This makes accented characters fully visible. */ | |
b28cb6ed | 15101 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
15102 | && row->phys_ascent > row->ascent) |
15103 | { | |
15104 | row->height += row->phys_ascent - row->ascent; | |
15105 | row->ascent = row->phys_ascent; | |
15106 | } | |
15107 | ||
5f5c8ee5 GM |
15108 | /* Compute how much of the line is visible. */ |
15109 | row->visible_height = row->height; | |
2311178e | 15110 | |
da8b7f4f KS |
15111 | min_y = WINDOW_HEADER_LINE_HEIGHT (it->w); |
15112 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (it->w); | |
75c5350a GM |
15113 | |
15114 | if (row->y < min_y) | |
15115 | row->visible_height -= min_y - row->y; | |
15116 | if (row->y + row->height > max_y) | |
15117 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
15118 | } |
15119 | else | |
15120 | { | |
15121 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
15122 | if (row->continued_p) |
15123 | row->pixel_width -= it->continuation_pixel_width; | |
15124 | else if (row->truncated_on_right_p) | |
15125 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
15126 | row->ascent = row->phys_ascent = 0; |
15127 | row->height = row->phys_height = row->visible_height = 1; | |
546f98b8 | 15128 | row->extra_line_spacing = 0; |
5f5c8ee5 | 15129 | } |
67481ae5 | 15130 | |
5f5c8ee5 GM |
15131 | /* Compute a hash code for this row. */ |
15132 | row->hash = 0; | |
15133 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
15134 | for (i = 0; i < row->used[area]; ++i) | |
15135 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
15136 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
15137 | + row->glyphs[area][i].face_id |
15138 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 15139 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 15140 | |
5f5c8ee5 | 15141 | it->max_ascent = it->max_descent = 0; |
312246d1 | 15142 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 15143 | } |
12adba34 | 15144 | |
ca26e1c8 | 15145 | |
5f5c8ee5 | 15146 | /* Append one space to the glyph row of iterator IT if doing a |
03e35edc | 15147 | window-based redisplay. The space has the same face as |
80c6cb1f | 15148 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
15149 | |
15150 | This function is called to make sure that there is always one glyph | |
15151 | at the end of a glyph row that the cursor can be set on under | |
15152 | window-systems. (If there weren't such a glyph we would not know | |
15153 | how wide and tall a box cursor should be displayed). | |
15154 | ||
15155 | At the same time this space let's a nicely handle clearing to the | |
15156 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 15157 | |
80c6cb1f | 15158 | static int |
4933c603 | 15159 | append_space_for_newline (it, default_face_p) |
5f5c8ee5 | 15160 | struct it *it; |
4933c603 | 15161 | int default_face_p; |
5f5c8ee5 GM |
15162 | { |
15163 | if (FRAME_WINDOW_P (it->f)) | |
15164 | { | |
15165 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 15166 | |
5f5c8ee5 GM |
15167 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
15168 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 15169 | { |
cafafe0b GM |
15170 | /* Save some values that must not be changed. |
15171 | Must save IT->c and IT->len because otherwise | |
15172 | ITERATOR_AT_END_P wouldn't work anymore after | |
03e35edc | 15173 | append_space_for_newline has been called. */ |
478d746b | 15174 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
15175 | int saved_c = it->c, saved_len = it->len; |
15176 | int saved_x = it->current_x; | |
5f5c8ee5 | 15177 | int saved_face_id = it->face_id; |
cafafe0b | 15178 | struct text_pos saved_pos; |
5f5c8ee5 | 15179 | Lisp_Object saved_object; |
980806b6 | 15180 | struct face *face; |
5f5c8ee5 GM |
15181 | |
15182 | saved_object = it->object; | |
15183 | saved_pos = it->position; | |
2311178e | 15184 | |
5f5c8ee5 GM |
15185 | it->what = IT_CHARACTER; |
15186 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 15187 | it->object = make_number (0); |
5f5c8ee5 GM |
15188 | it->c = ' '; |
15189 | it->len = 1; | |
5f5c8ee5 | 15190 | |
4933c603 KS |
15191 | if (default_face_p) |
15192 | it->face_id = DEFAULT_FACE_ID; | |
15193 | else if (it->face_before_selective_p) | |
4aad61f8 | 15194 | it->face_id = it->saved_face_id; |
980806b6 KH |
15195 | face = FACE_FROM_ID (it->f, it->face_id); |
15196 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 15197 | |
5f5c8ee5 | 15198 | PRODUCE_GLYPHS (it); |
2311178e | 15199 | |
a9e5c932 | 15200 | it->override_ascent = -1; |
e893970b | 15201 | it->constrain_row_ascent_descent_p = 0; |
5f5c8ee5 GM |
15202 | it->current_x = saved_x; |
15203 | it->object = saved_object; | |
15204 | it->position = saved_pos; | |
15205 | it->what = saved_what; | |
15206 | it->face_id = saved_face_id; | |
cafafe0b GM |
15207 | it->len = saved_len; |
15208 | it->c = saved_c; | |
80c6cb1f | 15209 | return 1; |
5f5c8ee5 GM |
15210 | } |
15211 | } | |
80c6cb1f GM |
15212 | |
15213 | return 0; | |
5f5c8ee5 | 15214 | } |
12adba34 | 15215 | |
1842fc1a | 15216 | |
5f5c8ee5 GM |
15217 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
15218 | to the end of the display line. Called from display_line. | |
15219 | If the glyph row is empty, add a space glyph to it so that we | |
15220 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
2311178e | 15221 | |
5f5c8ee5 GM |
15222 | static void |
15223 | extend_face_to_end_of_line (it) | |
15224 | struct it *it; | |
15225 | { | |
15226 | struct face *face; | |
15227 | struct frame *f = it->f; | |
1842fc1a | 15228 | |
5f5c8ee5 GM |
15229 | /* If line is already filled, do nothing. */ |
15230 | if (it->current_x >= it->last_visible_x) | |
15231 | return; | |
2311178e | 15232 | |
5f5c8ee5 GM |
15233 | /* Face extension extends the background and box of IT->face_id |
15234 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
15235 | of the frame, we don't have to do anything. */ |
15236 | if (it->face_before_selective_p) | |
15237 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
15238 | else | |
15239 | face = FACE_FROM_ID (f, it->face_id); | |
2311178e | 15240 | |
5f5c8ee5 GM |
15241 | if (FRAME_WINDOW_P (f) |
15242 | && face->box == FACE_NO_BOX | |
15243 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
15244 | && !face->stipple) | |
15245 | return; | |
1842fc1a | 15246 | |
5f5c8ee5 GM |
15247 | /* Set the glyph row flag indicating that the face of the last glyph |
15248 | in the text area has to be drawn to the end of the text area. */ | |
15249 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 15250 | |
980806b6 KH |
15251 | /* If current character of IT is not ASCII, make sure we have the |
15252 | ASCII face. This will be automatically undone the next time | |
15253 | get_next_display_element returns a multibyte character. Note | |
15254 | that the character will always be single byte in unibyte text. */ | |
15255 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 15256 | { |
980806b6 | 15257 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 15258 | } |
545e04f6 | 15259 | |
5f5c8ee5 GM |
15260 | if (FRAME_WINDOW_P (f)) |
15261 | { | |
15262 | /* If the row is empty, add a space with the current face of IT, | |
15263 | so that we know which face to draw. */ | |
15264 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 15265 | { |
5f5c8ee5 | 15266 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 15267 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 15268 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 15269 | } |
5f5c8ee5 GM |
15270 | } |
15271 | else | |
15272 | { | |
15273 | /* Save some values that must not be changed. */ | |
15274 | int saved_x = it->current_x; | |
15275 | struct text_pos saved_pos; | |
15276 | Lisp_Object saved_object; | |
478d746b | 15277 | enum display_element_type saved_what = it->what; |
4aad61f8 | 15278 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
15279 | |
15280 | saved_object = it->object; | |
15281 | saved_pos = it->position; | |
2311178e | 15282 | |
5f5c8ee5 GM |
15283 | it->what = IT_CHARACTER; |
15284 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 15285 | it->object = make_number (0); |
5f5c8ee5 GM |
15286 | it->c = ' '; |
15287 | it->len = 1; | |
4aad61f8 | 15288 | it->face_id = face->id; |
2311178e | 15289 | |
5f5c8ee5 | 15290 | PRODUCE_GLYPHS (it); |
2311178e | 15291 | |
5f5c8ee5 GM |
15292 | while (it->current_x <= it->last_visible_x) |
15293 | PRODUCE_GLYPHS (it); | |
2311178e | 15294 | |
5f5c8ee5 GM |
15295 | /* Don't count these blanks really. It would let us insert a left |
15296 | truncation glyph below and make us set the cursor on them, maybe. */ | |
15297 | it->current_x = saved_x; | |
15298 | it->object = saved_object; | |
15299 | it->position = saved_pos; | |
15300 | it->what = saved_what; | |
4aad61f8 | 15301 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
15302 | } |
15303 | } | |
12adba34 | 15304 | |
545e04f6 | 15305 | |
5f5c8ee5 GM |
15306 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
15307 | trailing whitespace. */ | |
1c9241f5 | 15308 | |
5f5c8ee5 GM |
15309 | static int |
15310 | trailing_whitespace_p (charpos) | |
15311 | int charpos; | |
15312 | { | |
15313 | int bytepos = CHAR_TO_BYTE (charpos); | |
15314 | int c = 0; | |
7bbe686f | 15315 | |
5f5c8ee5 GM |
15316 | while (bytepos < ZV_BYTE |
15317 | && (c = FETCH_CHAR (bytepos), | |
15318 | c == ' ' || c == '\t')) | |
15319 | ++bytepos; | |
0d09d1e6 | 15320 | |
8f897821 GM |
15321 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
15322 | { | |
15323 | if (bytepos != PT_BYTE) | |
15324 | return 1; | |
15325 | } | |
15326 | return 0; | |
5f5c8ee5 | 15327 | } |
31b24551 | 15328 | |
545e04f6 | 15329 | |
5f5c8ee5 | 15330 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 15331 | |
5f5c8ee5 GM |
15332 | void |
15333 | highlight_trailing_whitespace (f, row) | |
15334 | struct frame *f; | |
15335 | struct glyph_row *row; | |
15336 | { | |
15337 | int used = row->used[TEXT_AREA]; | |
2311178e | 15338 | |
5f5c8ee5 GM |
15339 | if (used) |
15340 | { | |
15341 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
15342 | struct glyph *glyph = start + used - 1; | |
15343 | ||
ade0bee1 GM |
15344 | /* Skip over glyphs inserted to display the cursor at the |
15345 | end of a line, for extending the face of the last glyph | |
15346 | to the end of the line on terminals, and for truncation | |
15347 | and continuation glyphs. */ | |
65008712 GM |
15348 | while (glyph >= start |
15349 | && glyph->type == CHAR_GLYPH | |
65008712 | 15350 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
15351 | --glyph; |
15352 | ||
15353 | /* If last glyph is a space or stretch, and it's trailing | |
15354 | whitespace, set the face of all trailing whitespace glyphs in | |
15355 | IT->glyph_row to `trailing-whitespace'. */ | |
15356 | if (glyph >= start | |
15357 | && BUFFERP (glyph->object) | |
15358 | && (glyph->type == STRETCH_GLYPH | |
15359 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 15360 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 15361 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 15362 | { |
ff7d52cd KS |
15363 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0, 0); |
15364 | if (face_id < 0) | |
15365 | return; | |
2311178e | 15366 | |
5f5c8ee5 GM |
15367 | while (glyph >= start |
15368 | && BUFFERP (glyph->object) | |
15369 | && (glyph->type == STRETCH_GLYPH | |
15370 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
15371 | && glyph->u.ch == ' '))) |
15372 | (glyph--)->face_id = face_id; | |
545e04f6 | 15373 | } |
a2889657 | 15374 | } |
5f5c8ee5 | 15375 | } |
a2889657 | 15376 | |
5fcbb24d | 15377 | |
cafafe0b | 15378 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 15379 | used to hold the cursor. */ |
cafafe0b GM |
15380 | |
15381 | static int | |
15382 | cursor_row_p (w, row) | |
15383 | struct window *w; | |
15384 | struct glyph_row *row; | |
15385 | { | |
9a038881 | 15386 | int cursor_row_p = 1; |
2311178e | 15387 | |
cafafe0b GM |
15388 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
15389 | { | |
9a038881 | 15390 | /* If the row ends with a newline from a string, we don't want |
e0e9a80e KS |
15391 | the cursor there, but we still want it at the start of the |
15392 | string if the string starts in this row. | |
15393 | If the row is continued it doesn't end in a newline. */ | |
f323e507 | 15394 | if (CHARPOS (row->end.string_pos) >= 0) |
e0e9a80e KS |
15395 | cursor_row_p = (row->continued_p |
15396 | || PT >= MATRIX_ROW_START_CHARPOS (row)); | |
f323e507 RS |
15397 | else if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) |
15398 | { | |
15399 | /* If the row ends in middle of a real character, | |
15400 | and the line is continued, we want the cursor here. | |
15401 | That's because MATRIX_ROW_END_CHARPOS would equal | |
15402 | PT if PT is before the character. */ | |
15403 | if (!row->ends_in_ellipsis_p) | |
15404 | cursor_row_p = row->continued_p; | |
15405 | else | |
15406 | /* If the row ends in an ellipsis, then | |
15407 | MATRIX_ROW_END_CHARPOS will equal point after the invisible text. | |
15408 | We want that position to be displayed after the ellipsis. */ | |
15409 | cursor_row_p = 0; | |
15410 | } | |
9a038881 GM |
15411 | /* If the row ends at ZV, display the cursor at the end of that |
15412 | row instead of at the start of the row below. */ | |
15413 | else if (row->ends_at_zv_p) | |
15414 | cursor_row_p = 1; | |
15415 | else | |
15416 | cursor_row_p = 0; | |
cafafe0b GM |
15417 | } |
15418 | ||
9a038881 | 15419 | return cursor_row_p; |
cafafe0b GM |
15420 | } |
15421 | ||
15422 | ||
5f5c8ee5 GM |
15423 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
15424 | IT->w from text at the current position of IT. See dispextern.h | |
15425 | for an overview of struct it. Value is non-zero if | |
15426 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
15427 | only. */ | |
2311178e | 15428 | |
5f5c8ee5 GM |
15429 | static int |
15430 | display_line (it) | |
15431 | struct it *it; | |
15432 | { | |
15433 | struct glyph_row *row = it->glyph_row; | |
351b5434 | 15434 | Lisp_Object overlay_arrow_string; |
5f5c8ee5 GM |
15435 | |
15436 | /* We always start displaying at hpos zero even if hscrolled. */ | |
15437 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 15438 | |
cf4a901e KS |
15439 | if (MATRIX_ROW_VPOS (row, it->w->desired_matrix) |
15440 | >= it->w->desired_matrix->nrows) | |
15441 | { | |
15442 | it->w->nrows_scale_factor++; | |
15443 | fonts_changed_p = 1; | |
15444 | return 0; | |
15445 | } | |
12adba34 | 15446 | |
5f5c8ee5 GM |
15447 | /* Is IT->w showing the region? */ |
15448 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 15449 | |
5f5c8ee5 GM |
15450 | /* Clear the result glyph row and enable it. */ |
15451 | prepare_desired_row (row); | |
12adba34 | 15452 | |
5f5c8ee5 | 15453 | row->y = it->current_y; |
29b3ea63 | 15454 | row->start = it->start; |
5f5c8ee5 GM |
15455 | row->continuation_lines_width = it->continuation_lines_width; |
15456 | row->displays_text_p = 1; | |
91004049 GM |
15457 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
15458 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
15459 | |
15460 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
15461 | display_line on only one line at a time, in which case this | |
15462 | can't really hurt too much, or we call it on lines which appear | |
15463 | one after another in the buffer, in which case all calls to | |
15464 | recenter_overlay_lists but the first will be pretty cheap. */ | |
15465 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
15466 | ||
5f5c8ee5 GM |
15467 | /* Move over display elements that are not visible because we are |
15468 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
15469 | if the first glyph is partially visible or if we hit a line end. */ | |
15470 | if (it->current_x < it->first_visible_x) | |
bd0e59f8 KS |
15471 | { |
15472 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
15473 | MOVE_TO_POS | MOVE_TO_X); | |
bd0e59f8 | 15474 | } |
5f5c8ee5 GM |
15475 | |
15476 | /* Get the initial row height. This is either the height of the | |
15477 | text hscrolled, if there is any, or zero. */ | |
15478 | row->ascent = it->max_ascent; | |
15479 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
15480 | row->phys_ascent = it->max_phys_ascent; |
15481 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
546f98b8 | 15482 | row->extra_line_spacing = it->max_extra_line_spacing; |
5f5c8ee5 GM |
15483 | |
15484 | /* Loop generating characters. The loop is left with IT on the next | |
15485 | character to display. */ | |
15486 | while (1) | |
15487 | { | |
15488 | int n_glyphs_before, hpos_before, x_before; | |
15489 | int x, i, nglyphs; | |
ae26e27d | 15490 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 15491 | |
5f5c8ee5 GM |
15492 | /* Retrieve the next thing to display. Value is zero if end of |
15493 | buffer reached. */ | |
15494 | if (!get_next_display_element (it)) | |
15495 | { | |
15496 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
15497 | display the cursor there under X. Set the charpos of the |
15498 | first glyph of blank lines not corresponding to any text | |
15499 | to -1. */ | |
6d925726 KS |
15500 | #ifdef HAVE_WINDOW_SYSTEM |
15501 | if (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)) | |
15502 | row->exact_window_width_line_p = 1; | |
15503 | else | |
15504 | #endif /* HAVE_WINDOW_SYSTEM */ | |
4933c603 | 15505 | if ((append_space_for_newline (it, 1) && row->used[TEXT_AREA] == 1) |
1b335865 | 15506 | || row->used[TEXT_AREA] == 0) |
a2889657 | 15507 | { |
5f5c8ee5 GM |
15508 | row->glyphs[TEXT_AREA]->charpos = -1; |
15509 | row->displays_text_p = 0; | |
15510 | ||
2ad551af | 15511 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
15512 | && (!MINI_WINDOW_P (it->w) |
15513 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 15514 | row->indicate_empty_line_p = 1; |
a2889657 | 15515 | } |
2311178e | 15516 | |
5f5c8ee5 GM |
15517 | it->continuation_lines_width = 0; |
15518 | row->ends_at_zv_p = 1; | |
15519 | break; | |
a2889657 | 15520 | } |
a2889657 | 15521 | |
5f5c8ee5 GM |
15522 | /* Now, get the metrics of what we want to display. This also |
15523 | generates glyphs in `row' (which is IT->glyph_row). */ | |
15524 | n_glyphs_before = row->used[TEXT_AREA]; | |
15525 | x = it->current_x; | |
e6819faf GM |
15526 | |
15527 | /* Remember the line height so far in case the next element doesn't | |
15528 | fit on the line. */ | |
15529 | if (!it->truncate_lines_p) | |
15530 | { | |
15531 | ascent = it->max_ascent; | |
15532 | descent = it->max_descent; | |
15533 | phys_ascent = it->max_phys_ascent; | |
15534 | phys_descent = it->max_phys_descent; | |
15535 | } | |
2311178e | 15536 | |
5f5c8ee5 | 15537 | PRODUCE_GLYPHS (it); |
a2889657 | 15538 | |
5f5c8ee5 GM |
15539 | /* If this display element was in marginal areas, continue with |
15540 | the next one. */ | |
15541 | if (it->area != TEXT_AREA) | |
a2889657 | 15542 | { |
5f5c8ee5 GM |
15543 | row->ascent = max (row->ascent, it->max_ascent); |
15544 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
15545 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
15546 | row->phys_height = max (row->phys_height, | |
15547 | it->max_phys_ascent + it->max_phys_descent); | |
546f98b8 KS |
15548 | row->extra_line_spacing = max (row->extra_line_spacing, |
15549 | it->max_extra_line_spacing); | |
cafafe0b | 15550 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
15551 | continue; |
15552 | } | |
5936754e | 15553 | |
5f5c8ee5 GM |
15554 | /* Does the display element fit on the line? If we truncate |
15555 | lines, we should draw past the right edge of the window. If | |
15556 | we don't truncate, we want to stop so that we can display the | |
15557 | continuation glyph before the right margin. If lines are | |
15558 | continued, there are two possible strategies for characters | |
15559 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
15560 | glyphs as possible in this line and leave the rest for the | |
15561 | continuation line, or display the whole element in the next | |
15562 | line. Original redisplay did the former, so we do it also. */ | |
15563 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
15564 | hpos_before = it->hpos; | |
15565 | x_before = x; | |
4dcd74e6 | 15566 | |
4b41cebb | 15567 | if (/* Not a newline. */ |
4dcd74e6 | 15568 | nglyphs > 0 |
202c1b5b | 15569 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
15570 | && it->current_x < it->last_visible_x) |
15571 | { | |
37be86f2 | 15572 | it->hpos += nglyphs; |
5f5c8ee5 GM |
15573 | row->ascent = max (row->ascent, it->max_ascent); |
15574 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
15575 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
15576 | row->phys_height = max (row->phys_height, | |
15577 | it->max_phys_ascent + it->max_phys_descent); | |
546f98b8 KS |
15578 | row->extra_line_spacing = max (row->extra_line_spacing, |
15579 | it->max_extra_line_spacing); | |
5f5c8ee5 GM |
15580 | if (it->current_x - it->pixel_width < it->first_visible_x) |
15581 | row->x = x - it->first_visible_x; | |
15582 | } | |
15583 | else | |
15584 | { | |
15585 | int new_x; | |
15586 | struct glyph *glyph; | |
2311178e | 15587 | |
5f5c8ee5 | 15588 | for (i = 0; i < nglyphs; ++i, x = new_x) |
b5bbc9a5 | 15589 | { |
5f5c8ee5 GM |
15590 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
15591 | new_x = x + glyph->pixel_width; | |
15592 | ||
15593 | if (/* Lines are continued. */ | |
15594 | !it->truncate_lines_p | |
15595 | && (/* Glyph doesn't fit on the line. */ | |
15596 | new_x > it->last_visible_x | |
15597 | /* Or it fits exactly on a window system frame. */ | |
15598 | || (new_x == it->last_visible_x | |
15599 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 15600 | { |
5f5c8ee5 | 15601 | /* End of a continued line. */ |
2311178e | 15602 | |
5f5c8ee5 GM |
15603 | if (it->hpos == 0 |
15604 | || (new_x == it->last_visible_x | |
15605 | && FRAME_WINDOW_P (it->f))) | |
15606 | { | |
e6819faf GM |
15607 | /* Current glyph is the only one on the line or |
15608 | fits exactly on the line. We must continue | |
15609 | the line because we can't draw the cursor | |
15610 | after the glyph. */ | |
5f5c8ee5 GM |
15611 | row->continued_p = 1; |
15612 | it->current_x = new_x; | |
15613 | it->continuation_lines_width += new_x; | |
15614 | ++it->hpos; | |
15615 | if (i == nglyphs - 1) | |
88e6b646 KS |
15616 | { |
15617 | set_iterator_to_next (it, 1); | |
7af0e8d7 | 15618 | #ifdef HAVE_WINDOW_SYSTEM |
88e6b646 KS |
15619 | if (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)) |
15620 | { | |
6d925726 KS |
15621 | if (!get_next_display_element (it)) |
15622 | { | |
15623 | row->exact_window_width_line_p = 1; | |
15624 | it->continuation_lines_width = 0; | |
15625 | row->continued_p = 0; | |
15626 | row->ends_at_zv_p = 1; | |
15627 | } | |
15628 | else if (ITERATOR_AT_END_OF_LINE_P (it)) | |
88e6b646 KS |
15629 | { |
15630 | row->continued_p = 0; | |
15631 | row->exact_window_width_line_p = 1; | |
15632 | } | |
15633 | } | |
7af0e8d7 | 15634 | #endif /* HAVE_WINDOW_SYSTEM */ |
88e6b646 | 15635 | } |
5f5c8ee5 | 15636 | } |
3b3c4bf0 GM |
15637 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
15638 | && !FRAME_WINDOW_P (it->f)) | |
15639 | { | |
15640 | /* A padding glyph that doesn't fit on this line. | |
15641 | This means the whole character doesn't fit | |
15642 | on the line. */ | |
15643 | row->used[TEXT_AREA] = n_glyphs_before; | |
2311178e | 15644 | |
3b3c4bf0 GM |
15645 | /* Fill the rest of the row with continuation |
15646 | glyphs like in 20.x. */ | |
15647 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
15648 | < row->glyphs[1 + TEXT_AREA]) | |
15649 | produce_special_glyphs (it, IT_CONTINUATION); | |
2311178e | 15650 | |
3b3c4bf0 GM |
15651 | row->continued_p = 1; |
15652 | it->current_x = x_before; | |
15653 | it->continuation_lines_width += x_before; | |
2311178e | 15654 | |
3b3c4bf0 GM |
15655 | /* Restore the height to what it was before the |
15656 | element not fitting on the line. */ | |
15657 | it->max_ascent = ascent; | |
15658 | it->max_descent = descent; | |
15659 | it->max_phys_ascent = phys_ascent; | |
15660 | it->max_phys_descent = phys_descent; | |
15661 | } | |
0df56f4d GM |
15662 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
15663 | { | |
15664 | /* A TAB that extends past the right edge of the | |
15665 | window. This produces a single glyph on | |
15666 | window system frames. We leave the glyph in | |
15667 | this row and let it fill the row, but don't | |
15668 | consume the TAB. */ | |
15669 | it->continuation_lines_width += it->last_visible_x; | |
15670 | row->ends_in_middle_of_char_p = 1; | |
15671 | row->continued_p = 1; | |
15672 | glyph->pixel_width = it->last_visible_x - x; | |
15673 | it->starts_in_middle_of_char_p = 1; | |
15674 | } | |
5f5c8ee5 | 15675 | else |
5936754e | 15676 | { |
0df56f4d GM |
15677 | /* Something other than a TAB that draws past |
15678 | the right edge of the window. Restore | |
15679 | positions to values before the element. */ | |
5f5c8ee5 | 15680 | row->used[TEXT_AREA] = n_glyphs_before + i; |
2311178e | 15681 | |
5f5c8ee5 GM |
15682 | /* Display continuation glyphs. */ |
15683 | if (!FRAME_WINDOW_P (it->f)) | |
15684 | produce_special_glyphs (it, IT_CONTINUATION); | |
15685 | row->continued_p = 1; | |
653c329b | 15686 | |
8a955545 | 15687 | it->current_x = x_before; |
0df56f4d | 15688 | it->continuation_lines_width += x; |
8a955545 | 15689 | extend_face_to_end_of_line (it); |
2311178e | 15690 | |
91004049 GM |
15691 | if (nglyphs > 1 && i > 0) |
15692 | { | |
15693 | row->ends_in_middle_of_char_p = 1; | |
15694 | it->starts_in_middle_of_char_p = 1; | |
15695 | } | |
2311178e | 15696 | |
e6819faf GM |
15697 | /* Restore the height to what it was before the |
15698 | element not fitting on the line. */ | |
15699 | it->max_ascent = ascent; | |
15700 | it->max_descent = descent; | |
15701 | it->max_phys_ascent = phys_ascent; | |
15702 | it->max_phys_descent = phys_descent; | |
5936754e | 15703 | } |
e6819faf | 15704 | |
5f5c8ee5 GM |
15705 | break; |
15706 | } | |
15707 | else if (new_x > it->first_visible_x) | |
15708 | { | |
15709 | /* Increment number of glyphs actually displayed. */ | |
15710 | ++it->hpos; | |
2311178e | 15711 | |
5f5c8ee5 GM |
15712 | if (x < it->first_visible_x) |
15713 | /* Glyph is partially visible, i.e. row starts at | |
15714 | negative X position. */ | |
15715 | row->x = x - it->first_visible_x; | |
15716 | } | |
15717 | else | |
15718 | { | |
15719 | /* Glyph is completely off the left margin of the | |
15720 | window. This should not happen because of the | |
72b8c434 RS |
15721 | move_it_in_display_line at the start of this |
15722 | function, unless the text display area of the | |
15723 | window is empty. */ | |
15724 | xassert (it->first_visible_x <= it->last_visible_x); | |
a2889657 | 15725 | } |
a2889657 | 15726 | } |
2311178e | 15727 | |
5f5c8ee5 GM |
15728 | row->ascent = max (row->ascent, it->max_ascent); |
15729 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
15730 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
15731 | row->phys_height = max (row->phys_height, | |
15732 | it->max_phys_ascent + it->max_phys_descent); | |
546f98b8 KS |
15733 | row->extra_line_spacing = max (row->extra_line_spacing, |
15734 | it->max_extra_line_spacing); | |
2311178e | 15735 | |
5f5c8ee5 | 15736 | /* End of this display line if row is continued. */ |
6d925726 | 15737 | if (row->continued_p || row->ends_at_zv_p) |
5f5c8ee5 | 15738 | break; |
a2889657 | 15739 | } |
a2889657 | 15740 | |
88e6b646 | 15741 | at_end_of_line: |
5f5c8ee5 GM |
15742 | /* Is this a line end? If yes, we're also done, after making |
15743 | sure that a non-default face is extended up to the right | |
15744 | margin of the window. */ | |
15745 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 15746 | { |
5f5c8ee5 GM |
15747 | int used_before = row->used[TEXT_AREA]; |
15748 | ||
e74fb0f7 GM |
15749 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
15750 | ||
7af0e8d7 | 15751 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
15752 | /* Add a space at the end of the line that is used to |
15753 | display the cursor there. */ | |
88e6b646 | 15754 | if (!IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)) |
4933c603 | 15755 | append_space_for_newline (it, 0); |
7af0e8d7 | 15756 | #endif /* HAVE_WINDOW_SYSTEM */ |
2311178e | 15757 | |
5f5c8ee5 GM |
15758 | /* Extend the face to the end of the line. */ |
15759 | extend_face_to_end_of_line (it); | |
15760 | ||
15761 | /* Make sure we have the position. */ | |
15762 | if (used_before == 0) | |
15763 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
2311178e | 15764 | |
5f5c8ee5 | 15765 | /* Consume the line end. This skips over invisible lines. */ |
cafafe0b | 15766 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
15767 | it->continuation_lines_width = 0; |
15768 | break; | |
1c9241f5 | 15769 | } |
a2889657 | 15770 | |
2311178e | 15771 | /* Proceed with next display element. Note that this skips |
5f5c8ee5 | 15772 | over lines invisible because of selective display. */ |
cafafe0b | 15773 | set_iterator_to_next (it, 1); |
b1d1124b | 15774 | |
5f5c8ee5 GM |
15775 | /* If we truncate lines, we are done when the last displayed |
15776 | glyphs reach past the right margin of the window. */ | |
15777 | if (it->truncate_lines_p | |
15778 | && (FRAME_WINDOW_P (it->f) | |
15779 | ? (it->current_x >= it->last_visible_x) | |
15780 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 15781 | { |
5f5c8ee5 GM |
15782 | /* Maybe add truncation glyphs. */ |
15783 | if (!FRAME_WINDOW_P (it->f)) | |
15784 | { | |
a98b5ed9 | 15785 | int i, n; |
2311178e | 15786 | |
a98b5ed9 GM |
15787 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
15788 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
15789 | break; | |
15790 | ||
15791 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
15792 | { | |
15793 | row->used[TEXT_AREA] = i; | |
15794 | produce_special_glyphs (it, IT_TRUNCATION); | |
15795 | } | |
5f5c8ee5 | 15796 | } |
7af0e8d7 | 15797 | #ifdef HAVE_WINDOW_SYSTEM |
88e6b646 KS |
15798 | else |
15799 | { | |
15800 | /* Don't truncate if we can overflow newline into fringe. */ | |
15801 | if (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)) | |
15802 | { | |
6d925726 KS |
15803 | if (!get_next_display_element (it)) |
15804 | { | |
6d925726 KS |
15805 | it->continuation_lines_width = 0; |
15806 | row->ends_at_zv_p = 1; | |
15807 | row->exact_window_width_line_p = 1; | |
15808 | break; | |
6d925726 | 15809 | } |
88e6b646 KS |
15810 | if (ITERATOR_AT_END_OF_LINE_P (it)) |
15811 | { | |
15812 | row->exact_window_width_line_p = 1; | |
15813 | goto at_end_of_line; | |
15814 | } | |
15815 | } | |
15816 | } | |
7af0e8d7 | 15817 | #endif /* HAVE_WINDOW_SYSTEM */ |
2311178e | 15818 | |
5f5c8ee5 GM |
15819 | row->truncated_on_right_p = 1; |
15820 | it->continuation_lines_width = 0; | |
312246d1 | 15821 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
15822 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
15823 | it->hpos = hpos_before; | |
15824 | it->current_x = x_before; | |
15825 | break; | |
75d13c64 | 15826 | } |
a2889657 | 15827 | } |
a2889657 | 15828 | |
5f5c8ee5 GM |
15829 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
15830 | at the left window margin. */ | |
15831 | if (it->first_visible_x | |
15832 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
15833 | { | |
15834 | if (!FRAME_WINDOW_P (it->f)) | |
15835 | insert_left_trunc_glyphs (it); | |
15836 | row->truncated_on_left_p = 1; | |
15837 | } | |
a2889657 | 15838 | |
5f5c8ee5 GM |
15839 | /* If the start of this line is the overlay arrow-position, then |
15840 | mark this glyph row as the one containing the overlay arrow. | |
15841 | This is clearly a mess with variable size fonts. It would be | |
15842 | better to let it be displayed like cursors under X. */ | |
25bcb353 KS |
15843 | if ((row->displays_text_p || !overlay_arrow_seen) |
15844 | && (overlay_arrow_string = overlay_arrow_at_row (it, row), | |
15845 | !NILP (overlay_arrow_string))) | |
a2889657 | 15846 | { |
b46952ae | 15847 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
c514efbb | 15848 | if (STRINGP (overlay_arrow_string)) |
c4628384 | 15849 | { |
351b5434 | 15850 | struct glyph_row *arrow_row |
7d90b587 | 15851 | = get_overlay_arrow_glyph_row (it->w, overlay_arrow_string); |
5f5c8ee5 GM |
15852 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; |
15853 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
15854 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
15855 | struct glyph *p2, *end; | |
15856 | ||
15857 | /* Copy the arrow glyphs. */ | |
15858 | while (glyph < arrow_end) | |
15859 | *p++ = *glyph++; | |
15860 | ||
15861 | /* Throw away padding glyphs. */ | |
15862 | p2 = p; | |
15863 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
15864 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
15865 | ++p2; | |
15866 | if (p2 > p) | |
212e4f87 | 15867 | { |
5f5c8ee5 GM |
15868 | while (p2 < end) |
15869 | *p++ = *p2++; | |
15870 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 15871 | } |
c4628384 | 15872 | } |
c514efbb KS |
15873 | else |
15874 | { | |
25bcb353 KS |
15875 | xassert (INTEGERP (overlay_arrow_string)); |
15876 | row->overlay_arrow_bitmap = XINT (overlay_arrow_string); | |
c514efbb | 15877 | } |
a2889657 JB |
15878 | overlay_arrow_seen = 1; |
15879 | } | |
15880 | ||
5f5c8ee5 GM |
15881 | /* Compute pixel dimensions of this line. */ |
15882 | compute_line_metrics (it); | |
15883 | ||
15884 | /* Remember the position at which this line ends. */ | |
15885 | row->end = it->current; | |
15886 | ||
f323e507 RS |
15887 | /* Record whether this row ends inside an ellipsis. */ |
15888 | row->ends_in_ellipsis_p | |
a6f82cc4 | 15889 | = (it->method == GET_FROM_DISPLAY_VECTOR |
f323e507 RS |
15890 | && it->ellipsis_p); |
15891 | ||
6d925726 KS |
15892 | /* Save fringe bitmaps in this row. */ |
15893 | row->left_user_fringe_bitmap = it->left_user_fringe_bitmap; | |
15894 | row->left_user_fringe_face_id = it->left_user_fringe_face_id; | |
15895 | row->right_user_fringe_bitmap = it->right_user_fringe_bitmap; | |
15896 | row->right_user_fringe_face_id = it->right_user_fringe_face_id; | |
15897 | ||
15898 | it->left_user_fringe_bitmap = 0; | |
15899 | it->left_user_fringe_face_id = 0; | |
15900 | it->right_user_fringe_bitmap = 0; | |
15901 | it->right_user_fringe_face_id = 0; | |
15902 | ||
173cbca8 | 15903 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
15904 | if (it->w->cursor.vpos < 0 |
15905 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
15906 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
15907 | && cursor_row_p (it->w, row)) | |
15908 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
15909 | |
15910 | /* Highlight trailing whitespace. */ | |
8f897821 | 15911 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
15912 | highlight_trailing_whitespace (it->f, it->glyph_row); |
15913 | ||
15914 | /* Prepare for the next line. This line starts horizontally at (X | |
15915 | HPOS) = (0 0). Vertical positions are incremented. As a | |
15916 | convenience for the caller, IT->glyph_row is set to the next | |
15917 | row to be used. */ | |
15918 | it->current_x = it->hpos = 0; | |
15919 | it->current_y += row->height; | |
15920 | ++it->vpos; | |
15921 | ++it->glyph_row; | |
29b3ea63 | 15922 | it->start = it->current; |
5f5c8ee5 | 15923 | return row->displays_text_p; |
a2889657 | 15924 | } |
5f5c8ee5 GM |
15925 | |
15926 | ||
a2889657 | 15927 | \f |
5f5c8ee5 GM |
15928 | /*********************************************************************** |
15929 | Menu Bar | |
15930 | ***********************************************************************/ | |
15931 | ||
15932 | /* Redisplay the menu bar in the frame for window W. | |
15933 | ||
15934 | The menu bar of X frames that don't have X toolkit support is | |
15935 | displayed in a special window W->frame->menu_bar_window. | |
2311178e | 15936 | |
5f5c8ee5 GM |
15937 | The menu bar of terminal frames is treated specially as far as |
15938 | glyph matrices are concerned. Menu bar lines are not part of | |
15939 | windows, so the update is done directly on the frame matrix rows | |
15940 | for the menu bar. */ | |
7ce2c095 RS |
15941 | |
15942 | static void | |
15943 | display_menu_bar (w) | |
15944 | struct window *w; | |
15945 | { | |
5f5c8ee5 GM |
15946 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
15947 | struct it it; | |
15948 | Lisp_Object items; | |
8351baf2 | 15949 | int i; |
7ce2c095 | 15950 | |
5f5c8ee5 | 15951 | /* Don't do all this for graphical frames. */ |
dc937613 | 15952 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
15953 | if (!NILP (Vwindow_system)) |
15954 | return; | |
dc937613 | 15955 | #endif |
488dd4c4 | 15956 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
d3413a53 | 15957 | if (FRAME_X_P (f)) |
7ce2c095 | 15958 | return; |
5f5c8ee5 | 15959 | #endif |
e0f712ba | 15960 | #ifdef MAC_OS |
1a578e9b AC |
15961 | if (FRAME_MAC_P (f)) |
15962 | return; | |
15963 | #endif | |
5f5c8ee5 GM |
15964 | |
15965 | #ifdef USE_X_TOOLKIT | |
15966 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 15967 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 | 15968 | it.first_visible_x = 0; |
da8b7f4f | 15969 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
5f5c8ee5 GM |
15970 | #else /* not USE_X_TOOLKIT */ |
15971 | if (FRAME_WINDOW_P (f)) | |
15972 | { | |
15973 | /* Menu bar lines are displayed in the desired matrix of the | |
15974 | dummy window menu_bar_window. */ | |
15975 | struct window *menu_w; | |
15976 | xassert (WINDOWP (f->menu_bar_window)); | |
15977 | menu_w = XWINDOW (f->menu_bar_window); | |
15978 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 15979 | MENU_FACE_ID); |
5f5c8ee5 | 15980 | it.first_visible_x = 0; |
da8b7f4f | 15981 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
5f5c8ee5 GM |
15982 | } |
15983 | else | |
15984 | { | |
15985 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
15986 | pixel x/y. */ | |
15987 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 15988 | MENU_FACE_ID); |
5f5c8ee5 | 15989 | it.first_visible_x = 0; |
da8b7f4f | 15990 | it.last_visible_x = FRAME_COLS (f); |
5f5c8ee5 GM |
15991 | } |
15992 | #endif /* not USE_X_TOOLKIT */ | |
15993 | ||
1862a24e MB |
15994 | if (! mode_line_inverse_video) |
15995 | /* Force the menu-bar to be displayed in the default face. */ | |
15996 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
15997 | ||
5f5c8ee5 GM |
15998 | /* Clear all rows of the menu bar. */ |
15999 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
16000 | { | |
16001 | struct glyph_row *row = it.glyph_row + i; | |
16002 | clear_glyph_row (row); | |
16003 | row->enabled_p = 1; | |
16004 | row->full_width_p = 1; | |
16005 | } | |
7ce2c095 | 16006 | |
5f5c8ee5 GM |
16007 | /* Display all items of the menu bar. */ |
16008 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 16009 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 16010 | { |
5f5c8ee5 GM |
16011 | Lisp_Object string; |
16012 | ||
16013 | /* Stop at nil string. */ | |
a61b7058 | 16014 | string = AREF (items, i + 1); |
8351baf2 RS |
16015 | if (NILP (string)) |
16016 | break; | |
2d66ad19 | 16017 | |
5f5c8ee5 | 16018 | /* Remember where item was displayed. */ |
a61b7058 | 16019 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 16020 | |
5f5c8ee5 GM |
16021 | /* Display the item, pad with one space. */ |
16022 | if (it.current_x < it.last_visible_x) | |
16023 | display_string (NULL, string, Qnil, 0, 0, &it, | |
2051c264 | 16024 | SCHARS (string) + 1, 0, 0, -1); |
7ce2c095 RS |
16025 | } |
16026 | ||
2d66ad19 | 16027 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
16028 | if (it.current_x < it.last_visible_x) |
16029 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 16030 | |
5f5c8ee5 GM |
16031 | /* Compute the total height of the lines. */ |
16032 | compute_line_metrics (&it); | |
7ce2c095 | 16033 | } |
5f5c8ee5 GM |
16034 | |
16035 | ||
7ce2c095 | 16036 | \f |
5f5c8ee5 GM |
16037 | /*********************************************************************** |
16038 | Mode Line | |
16039 | ***********************************************************************/ | |
16040 | ||
715e84c9 GM |
16041 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
16042 | FORCE is non-zero, redisplay mode lines unconditionally. | |
16043 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
16044 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 16045 | |
715e84c9 GM |
16046 | static int |
16047 | redisplay_mode_lines (window, force) | |
16048 | Lisp_Object window; | |
16049 | int force; | |
16050 | { | |
16051 | int nwindows = 0; | |
2311178e | 16052 | |
715e84c9 GM |
16053 | while (!NILP (window)) |
16054 | { | |
16055 | struct window *w = XWINDOW (window); | |
2311178e | 16056 | |
715e84c9 GM |
16057 | if (WINDOWP (w->hchild)) |
16058 | nwindows += redisplay_mode_lines (w->hchild, force); | |
16059 | else if (WINDOWP (w->vchild)) | |
16060 | nwindows += redisplay_mode_lines (w->vchild, force); | |
16061 | else if (force | |
16062 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
16063 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
16064 | { | |
715e84c9 GM |
16065 | struct text_pos lpoint; |
16066 | struct buffer *old = current_buffer; | |
16067 | ||
16068 | /* Set the window's buffer for the mode line display. */ | |
16069 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
16070 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
2311178e | 16071 | |
715e84c9 GM |
16072 | /* Point refers normally to the selected window. For any |
16073 | other window, set up appropriate value. */ | |
16074 | if (!EQ (window, selected_window)) | |
16075 | { | |
16076 | struct text_pos pt; | |
2311178e | 16077 | |
715e84c9 GM |
16078 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); |
16079 | if (CHARPOS (pt) < BEGV) | |
16080 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
16081 | else if (CHARPOS (pt) > (ZV - 1)) | |
16082 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
16083 | else | |
16084 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
16085 | } | |
16086 | ||
715e84c9 GM |
16087 | /* Display mode lines. */ |
16088 | clear_glyph_matrix (w->desired_matrix); | |
16089 | if (display_mode_lines (w)) | |
16090 | { | |
16091 | ++nwindows; | |
16092 | w->must_be_updated_p = 1; | |
16093 | } | |
16094 | ||
16095 | /* Restore old settings. */ | |
715e84c9 GM |
16096 | set_buffer_internal_1 (old); |
16097 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
16098 | } | |
16099 | ||
16100 | window = w->next; | |
16101 | } | |
16102 | ||
16103 | return nwindows; | |
16104 | } | |
16105 | ||
16106 | ||
16107 | /* Display the mode and/or top line of window W. Value is the number | |
16108 | of mode lines displayed. */ | |
16109 | ||
16110 | static int | |
5f5c8ee5 | 16111 | display_mode_lines (w) |
a2889657 JB |
16112 | struct window *w; |
16113 | { | |
edd1e654 | 16114 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 16115 | int n = 0; |
edd1e654 GM |
16116 | |
16117 | old_selected_frame = selected_frame; | |
16118 | selected_frame = w->frame; | |
16119 | old_selected_window = selected_window; | |
16120 | XSETWINDOW (selected_window, w); | |
2311178e | 16121 | |
5f5c8ee5 | 16122 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 16123 | line_number_displayed = 0; |
155ef550 | 16124 | w->column_number_displayed = Qnil; |
aa6d10fa | 16125 | |
5f5c8ee5 | 16126 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 | 16127 | { |
c96e83bf | 16128 | struct window *sel_w = XWINDOW (old_selected_window); |
f87c0a98 | 16129 | |
96d2320f | 16130 | /* Select mode line face based on the real selected window. */ |
c96e83bf | 16131 | display_mode_line (w, CURRENT_MODE_LINE_FACE_ID_3 (sel_w, sel_w, w), |
715e84c9 GM |
16132 | current_buffer->mode_line_format); |
16133 | ++n; | |
16134 | } | |
2311178e | 16135 | |
045dee35 | 16136 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
16137 | { |
16138 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
16139 | current_buffer->header_line_format); | |
16140 | ++n; | |
16141 | } | |
16142 | ||
edd1e654 GM |
16143 | selected_frame = old_selected_frame; |
16144 | selected_window = old_selected_window; | |
715e84c9 | 16145 | return n; |
5f5c8ee5 | 16146 | } |
03b294dc | 16147 | |
03b294dc | 16148 | |
5f5c8ee5 | 16149 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 16150 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
16151 | FORMAT is the mode line format to display. Value is the pixel |
16152 | height of the mode line displayed. */ | |
03b294dc | 16153 | |
04612a64 | 16154 | static int |
5f5c8ee5 GM |
16155 | display_mode_line (w, face_id, format) |
16156 | struct window *w; | |
16157 | enum face_id face_id; | |
16158 | Lisp_Object format; | |
16159 | { | |
16160 | struct it it; | |
16161 | struct face *face; | |
53088ce8 | 16162 | int count = SPECPDL_INDEX (); |
03b294dc | 16163 | |
5f5c8ee5 GM |
16164 | init_iterator (&it, w, -1, -1, NULL, face_id); |
16165 | prepare_desired_row (it.glyph_row); | |
16166 | ||
da06e4d7 KS |
16167 | it.glyph_row->mode_line_p = 1; |
16168 | ||
1862a24e MB |
16169 | if (! mode_line_inverse_video) |
16170 | /* Force the mode-line to be displayed in the default face. */ | |
16171 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
16172 | ||
53088ce8 | 16173 | record_unwind_protect (unwind_format_mode_line, |
f5b8d5f2 | 16174 | format_mode_line_unwind_data (NULL, 0)); |
53088ce8 KS |
16175 | |
16176 | mode_line_target = MODE_LINE_DISPLAY; | |
16177 | ||
5f5c8ee5 GM |
16178 | /* Temporarily make frame's keyboard the current kboard so that |
16179 | kboard-local variables in the mode_line_format will get the right | |
16180 | values. */ | |
16181 | push_frame_kboard (it.f); | |
c53a1624 | 16182 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); |
5f5c8ee5 | 16183 | pop_frame_kboard (); |
a2889657 | 16184 | |
53088ce8 KS |
16185 | unbind_to (count, Qnil); |
16186 | ||
5f5c8ee5 GM |
16187 | /* Fill up with spaces. */ |
16188 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
2311178e | 16189 | |
5f5c8ee5 GM |
16190 | compute_line_metrics (&it); |
16191 | it.glyph_row->full_width_p = 1; | |
5f5c8ee5 GM |
16192 | it.glyph_row->continued_p = 0; |
16193 | it.glyph_row->truncated_on_left_p = 0; | |
16194 | it.glyph_row->truncated_on_right_p = 0; | |
16195 | ||
16196 | /* Make a 3D mode-line have a shadow at its right end. */ | |
16197 | face = FACE_FROM_ID (it.f, face_id); | |
16198 | extend_face_to_end_of_line (&it); | |
16199 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 16200 | { |
5f5c8ee5 GM |
16201 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
16202 | + it.glyph_row->used[TEXT_AREA] - 1); | |
16203 | last->right_box_line_p = 1; | |
d7eb09a0 | 16204 | } |
04612a64 GM |
16205 | |
16206 | return it.glyph_row->height; | |
a2889657 JB |
16207 | } |
16208 | ||
f5b8d5f2 RS |
16209 | /* Move element ELT in LIST to the front of LIST. |
16210 | Return the updated list. */ | |
16211 | ||
16212 | static Lisp_Object | |
16213 | move_elt_to_front (elt, list) | |
16214 | Lisp_Object elt, list; | |
16215 | { | |
16216 | register Lisp_Object tail, prev; | |
16217 | register Lisp_Object tem; | |
16218 | ||
16219 | tail = list; | |
16220 | prev = Qnil; | |
16221 | while (CONSP (tail)) | |
16222 | { | |
16223 | tem = XCAR (tail); | |
8a955545 | 16224 | |
f5b8d5f2 RS |
16225 | if (EQ (elt, tem)) |
16226 | { | |
16227 | /* Splice out the link TAIL. */ | |
16228 | if (NILP (prev)) | |
16229 | list = XCDR (tail); | |
16230 | else | |
16231 | Fsetcdr (prev, XCDR (tail)); | |
16232 | ||
16233 | /* Now make it the first. */ | |
16234 | Fsetcdr (tail, list); | |
16235 | return tail; | |
16236 | } | |
16237 | else | |
16238 | prev = tail; | |
16239 | tail = XCDR (tail); | |
16240 | QUIT; | |
16241 | } | |
16242 | ||
16243 | /* Not found--return unchanged LIST. */ | |
16244 | return list; | |
16245 | } | |
16246 | ||
5f5c8ee5 GM |
16247 | /* Contribute ELT to the mode line for window IT->w. How it |
16248 | translates into text depends on its data type. | |
a2889657 | 16249 | |
5f5c8ee5 | 16250 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
16251 | |
16252 | DEPTH is the depth in recursion. It is used to prevent | |
16253 | infinite recursion here. | |
16254 | ||
5f5c8ee5 GM |
16255 | FIELD_WIDTH is the number of characters the display of ELT should |
16256 | occupy in the mode line, and PRECISION is the maximum number of | |
16257 | characters to display from ELT's representation. See | |
b8523839 | 16258 | display_string for details. |
a2889657 | 16259 | |
c53a1624 RS |
16260 | Returns the hpos of the end of the text generated by ELT. |
16261 | ||
16262 | PROPS is a property list to add to any string we encounter. | |
16263 | ||
7d0393cf | 16264 | If RISKY is nonzero, remove (disregard) any properties in any string |
93da8435 SM |
16265 | we encounter, and ignore :eval and :propertize. |
16266 | ||
4c0e4b80 KS |
16267 | The global variable `mode_line_target' determines whether the |
16268 | output is passed to `store_mode_line_noprop', | |
16269 | `store_mode_line_string', or `display_string'. */ | |
a2889657 JB |
16270 | |
16271 | static int | |
c53a1624 | 16272 | display_mode_element (it, depth, field_width, precision, elt, props, risky) |
5f5c8ee5 | 16273 | struct it *it; |
a2889657 | 16274 | int depth; |
5f5c8ee5 | 16275 | int field_width, precision; |
0fcf414f | 16276 | Lisp_Object elt, props; |
c53a1624 | 16277 | int risky; |
a2889657 | 16278 | { |
5f5c8ee5 | 16279 | int n = 0, field, prec; |
0fcf414f | 16280 | int literal = 0; |
5f5c8ee5 | 16281 | |
a2889657 | 16282 | tail_recurse: |
1a89be1e SM |
16283 | if (depth > 100) |
16284 | elt = build_string ("*too-deep*"); | |
a2889657 JB |
16285 | |
16286 | depth++; | |
16287 | ||
0220c518 | 16288 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
16289 | { |
16290 | case Lisp_String: | |
16291 | { | |
16292 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 | 16293 | unsigned char c; |
025568d9 | 16294 | int offset = 0; |
5f5c8ee5 | 16295 | |
f5b8d5f2 RS |
16296 | if (SCHARS (elt) > 0 |
16297 | && (!NILP (props) || risky)) | |
0fcf414f RS |
16298 | { |
16299 | Lisp_Object oprops, aelt; | |
16300 | oprops = Ftext_properties_at (make_number (0), elt); | |
c53a1624 | 16301 | |
3df5f8aa RS |
16302 | /* If the starting string's properties are not what |
16303 | we want, translate the string. Also, if the string | |
16304 | is risky, do that anyway. */ | |
16305 | ||
c53a1624 | 16306 | if (NILP (Fequal (props, oprops)) || risky) |
0fcf414f | 16307 | { |
ae02e06a RS |
16308 | /* If the starting string has properties, |
16309 | merge the specified ones onto the existing ones. */ | |
c53a1624 | 16310 | if (! NILP (oprops) && !risky) |
ae02e06a RS |
16311 | { |
16312 | Lisp_Object tem; | |
16313 | ||
16314 | oprops = Fcopy_sequence (oprops); | |
16315 | tem = props; | |
16316 | while (CONSP (tem)) | |
16317 | { | |
16318 | oprops = Fplist_put (oprops, XCAR (tem), | |
16319 | XCAR (XCDR (tem))); | |
16320 | tem = XCDR (XCDR (tem)); | |
16321 | } | |
16322 | props = oprops; | |
16323 | } | |
16324 | ||
0fcf414f RS |
16325 | aelt = Fassoc (elt, mode_line_proptrans_alist); |
16326 | if (! NILP (aelt) && !NILP (Fequal (props, XCDR (aelt)))) | |
adb63af1 | 16327 | { |
f5b8d5f2 RS |
16328 | /* AELT is what we want. Move it to the front |
16329 | without consing. */ | |
adb63af1 | 16330 | elt = XCAR (aelt); |
f5b8d5f2 RS |
16331 | mode_line_proptrans_alist |
16332 | = move_elt_to_front (aelt, mode_line_proptrans_alist); | |
adb63af1 | 16333 | } |
0fcf414f RS |
16334 | else |
16335 | { | |
adb63af1 RS |
16336 | Lisp_Object tem; |
16337 | ||
f5b8d5f2 RS |
16338 | /* If AELT has the wrong props, it is useless. |
16339 | so get rid of it. */ | |
16340 | if (! NILP (aelt)) | |
16341 | mode_line_proptrans_alist | |
16342 | = Fdelq (aelt, mode_line_proptrans_alist); | |
16343 | ||
0fcf414f | 16344 | elt = Fcopy_sequence (elt); |
dc3b2c8b SM |
16345 | Fset_text_properties (make_number (0), Flength (elt), |
16346 | props, elt); | |
adb63af1 | 16347 | /* Add this item to mode_line_proptrans_alist. */ |
0fcf414f RS |
16348 | mode_line_proptrans_alist |
16349 | = Fcons (Fcons (elt, props), | |
16350 | mode_line_proptrans_alist); | |
adb63af1 RS |
16351 | /* Truncate mode_line_proptrans_alist |
16352 | to at most 50 elements. */ | |
16353 | tem = Fnthcdr (make_number (50), | |
16354 | mode_line_proptrans_alist); | |
16355 | if (! NILP (tem)) | |
16356 | XSETCDR (tem, Qnil); | |
0fcf414f RS |
16357 | } |
16358 | } | |
16359 | } | |
16360 | ||
025568d9 | 16361 | offset = 0; |
ae02e06a | 16362 | |
0fcf414f RS |
16363 | if (literal) |
16364 | { | |
16365 | prec = precision - n; | |
4c0e4b80 KS |
16366 | switch (mode_line_target) |
16367 | { | |
16368 | case MODE_LINE_NOPROP: | |
16369 | case MODE_LINE_TITLE: | |
16370 | n += store_mode_line_noprop (SDATA (elt), -1, prec); | |
16371 | break; | |
16372 | case MODE_LINE_STRING: | |
16373 | n += store_mode_line_string (NULL, elt, 1, 0, prec, Qnil); | |
16374 | break; | |
16375 | case MODE_LINE_DISPLAY: | |
16376 | n += display_string (NULL, elt, Qnil, 0, 0, it, | |
16377 | 0, prec, 0, STRING_MULTIBYTE (elt)); | |
16378 | break; | |
16379 | } | |
0fcf414f RS |
16380 | |
16381 | break; | |
16382 | } | |
16383 | ||
025568d9 RS |
16384 | /* Handle the non-literal case. */ |
16385 | ||
5f5c8ee5 | 16386 | while ((precision <= 0 || n < precision) |
025568d9 | 16387 | && SREF (elt, offset) != 0 |
4c0e4b80 | 16388 | && (mode_line_target != MODE_LINE_DISPLAY |
5f5c8ee5 | 16389 | || it->current_x < it->last_visible_x)) |
a2889657 | 16390 | { |
025568d9 | 16391 | int last_offset = offset; |
5f5c8ee5 GM |
16392 | |
16393 | /* Advance to end of string or next format specifier. */ | |
025568d9 | 16394 | while ((c = SREF (elt, offset++)) != '\0' && c != '%') |
a2889657 | 16395 | ; |
2311178e | 16396 | |
025568d9 | 16397 | if (offset - 1 != last_offset) |
a2889657 | 16398 | { |
7a6b6cce KS |
16399 | int nchars, nbytes; |
16400 | ||
5f5c8ee5 GM |
16401 | /* Output to end of string or up to '%'. Field width |
16402 | is length of string. Don't output more than | |
16403 | PRECISION allows us. */ | |
025568d9 | 16404 | offset--; |
eaaa65b0 | 16405 | |
025568d9 RS |
16406 | prec = c_string_width (SDATA (elt) + last_offset, |
16407 | offset - last_offset, precision - n, | |
7a6b6cce | 16408 | &nchars, &nbytes); |
2311178e | 16409 | |
4c0e4b80 | 16410 | switch (mode_line_target) |
eaaa65b0 | 16411 | { |
4c0e4b80 KS |
16412 | case MODE_LINE_NOPROP: |
16413 | case MODE_LINE_TITLE: | |
025568d9 | 16414 | n += store_mode_line_noprop (SDATA (elt) + last_offset, 0, prec); |
4c0e4b80 KS |
16415 | break; |
16416 | case MODE_LINE_STRING: | |
16417 | { | |
025568d9 | 16418 | int bytepos = last_offset; |
4c0e4b80 KS |
16419 | int charpos = string_byte_to_char (elt, bytepos); |
16420 | int endpos = (precision <= 0 | |
025568d9 | 16421 | ? string_byte_to_char (elt, offset) |
4c0e4b80 KS |
16422 | : charpos + nchars); |
16423 | ||
16424 | n += store_mode_line_string (NULL, | |
16425 | Fsubstring (elt, make_number (charpos), | |
16426 | make_number (endpos)), | |
16427 | 0, 0, 0, Qnil); | |
16428 | } | |
16429 | break; | |
16430 | case MODE_LINE_DISPLAY: | |
16431 | { | |
025568d9 | 16432 | int bytepos = last_offset; |
4c0e4b80 KS |
16433 | int charpos = string_byte_to_char (elt, bytepos); |
16434 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
16435 | it, 0, prec, 0, | |
16436 | STRING_MULTIBYTE (elt)); | |
16437 | } | |
16438 | break; | |
eaaa65b0 | 16439 | } |
a2889657 JB |
16440 | } |
16441 | else /* c == '%' */ | |
16442 | { | |
025568d9 | 16443 | int percent_position = offset; |
2311178e | 16444 | |
5f5c8ee5 GM |
16445 | /* Get the specified minimum width. Zero means |
16446 | don't pad. */ | |
16447 | field = 0; | |
025568d9 | 16448 | while ((c = SREF (elt, offset++)) >= '0' && c <= '9') |
5f5c8ee5 | 16449 | field = field * 10 + c - '0'; |
a2889657 | 16450 | |
5f5c8ee5 GM |
16451 | /* Don't pad beyond the total padding allowed. */ |
16452 | if (field_width - n > 0 && field > field_width - n) | |
16453 | field = field_width - n; | |
a2889657 | 16454 | |
5f5c8ee5 GM |
16455 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
16456 | prec = precision - n; | |
2311178e | 16457 | |
a2889657 | 16458 | if (c == 'M') |
5f5c8ee5 | 16459 | n += display_mode_element (it, depth, field, prec, |
c53a1624 RS |
16460 | Vglobal_mode_string, props, |
16461 | risky); | |
a2889657 | 16462 | else if (c != 0) |
d39b6696 | 16463 | { |
72f62cb5 | 16464 | int multibyte; |
ae02e06a RS |
16465 | int bytepos, charpos; |
16466 | unsigned char *spec; | |
2311178e | 16467 | |
025568d9 | 16468 | bytepos = percent_position; |
ae02e06a RS |
16469 | charpos = (STRING_MULTIBYTE (elt) |
16470 | ? string_byte_to_char (elt, bytepos) | |
16471 | : bytepos); | |
16472 | ||
16473 | spec | |
72f62cb5 GM |
16474 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
16475 | ||
4c0e4b80 | 16476 | switch (mode_line_target) |
5f5c8ee5 | 16477 | { |
4c0e4b80 KS |
16478 | case MODE_LINE_NOPROP: |
16479 | case MODE_LINE_TITLE: | |
16480 | n += store_mode_line_noprop (spec, field, prec); | |
16481 | break; | |
16482 | case MODE_LINE_STRING: | |
16483 | { | |
16484 | int len = strlen (spec); | |
16485 | Lisp_Object tem = make_string (spec, len); | |
16486 | props = Ftext_properties_at (make_number (charpos), elt); | |
16487 | /* Should only keep face property in props */ | |
16488 | n += store_mode_line_string (NULL, tem, 0, field, prec, props); | |
16489 | } | |
16490 | break; | |
16491 | case MODE_LINE_DISPLAY: | |
16492 | { | |
16493 | int nglyphs_before, nwritten; | |
16494 | ||
16495 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; | |
16496 | nwritten = display_string (spec, Qnil, elt, | |
16497 | charpos, 0, it, | |
16498 | field, prec, 0, | |
16499 | multibyte); | |
16500 | ||
16501 | /* Assign to the glyphs written above the | |
16502 | string where the `%x' came from, position | |
16503 | of the `%'. */ | |
16504 | if (nwritten > 0) | |
16505 | { | |
16506 | struct glyph *glyph | |
16507 | = (it->glyph_row->glyphs[TEXT_AREA] | |
16508 | + nglyphs_before); | |
16509 | int i; | |
16510 | ||
16511 | for (i = 0; i < nwritten; ++i) | |
16512 | { | |
16513 | glyph[i].object = elt; | |
16514 | glyph[i].charpos = charpos; | |
16515 | } | |
16516 | ||
16517 | n += nwritten; | |
16518 | } | |
16519 | } | |
16520 | break; | |
5f5c8ee5 | 16521 | } |
d39b6696 | 16522 | } |
b8523839 AS |
16523 | else /* c == 0 */ |
16524 | break; | |
a2889657 JB |
16525 | } |
16526 | } | |
16527 | } | |
16528 | break; | |
16529 | ||
16530 | case Lisp_Symbol: | |
16531 | /* A symbol: process the value of the symbol recursively | |
16532 | as if it appeared here directly. Avoid error if symbol void. | |
16533 | Special case: if value of symbol is a string, output the string | |
16534 | literally. */ | |
16535 | { | |
16536 | register Lisp_Object tem; | |
c53a1624 RS |
16537 | |
16538 | /* If the variable is not marked as risky to set | |
16539 | then its contents are risky to use. */ | |
16540 | if (NILP (Fget (elt, Qrisky_local_variable))) | |
16541 | risky = 1; | |
16542 | ||
a2889657 | 16543 | tem = Fboundp (elt); |
265a9e55 | 16544 | if (!NILP (tem)) |
a2889657 JB |
16545 | { |
16546 | tem = Fsymbol_value (elt); | |
16547 | /* If value is a string, output that string literally: | |
16548 | don't check for % within it. */ | |
e24c997d | 16549 | if (STRINGP (tem)) |
0fcf414f RS |
16550 | literal = 1; |
16551 | ||
16552 | if (!EQ (tem, elt)) | |
5f5c8ee5 GM |
16553 | { |
16554 | /* Give up right away for nil or t. */ | |
16555 | elt = tem; | |
16556 | goto tail_recurse; | |
16557 | } | |
a2889657 JB |
16558 | } |
16559 | } | |
16560 | break; | |
16561 | ||
16562 | case Lisp_Cons: | |
16563 | { | |
16564 | register Lisp_Object car, tem; | |
16565 | ||
0fcf414f RS |
16566 | /* A cons cell: five distinct cases. |
16567 | If first element is :eval or :propertize, do something special. | |
a2889657 JB |
16568 | If first element is a string or a cons, process all the elements |
16569 | and effectively concatenate them. | |
16570 | If first element is a negative number, truncate displaying cdr to | |
16571 | at most that many characters. If positive, pad (with spaces) | |
16572 | to at least that many characters. | |
16573 | If first element is a symbol, process the cadr or caddr recursively | |
16574 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 16575 | car = XCAR (elt); |
0fcf414f | 16576 | if (EQ (car, QCeval)) |
5f5c8ee5 GM |
16577 | { |
16578 | /* An element of the form (:eval FORM) means evaluate FORM | |
16579 | and use the result as mode line elements. */ | |
0fcf414f | 16580 | |
c53a1624 RS |
16581 | if (risky) |
16582 | break; | |
16583 | ||
0fcf414f RS |
16584 | if (CONSP (XCDR (elt))) |
16585 | { | |
16586 | Lisp_Object spec; | |
16587 | spec = safe_eval (XCAR (XCDR (elt))); | |
16588 | n += display_mode_element (it, depth, field_width - n, | |
c53a1624 RS |
16589 | precision - n, spec, props, |
16590 | risky); | |
0fcf414f RS |
16591 | } |
16592 | } | |
16593 | else if (EQ (car, QCpropertize)) | |
16594 | { | |
c53a1624 RS |
16595 | /* An element of the form (:propertize ELT PROPS...) |
16596 | means display ELT but applying properties PROPS. */ | |
16597 | ||
16598 | if (risky) | |
16599 | break; | |
16600 | ||
0fcf414f | 16601 | if (CONSP (XCDR (elt))) |
c53a1624 RS |
16602 | n += display_mode_element (it, depth, field_width - n, |
16603 | precision - n, XCAR (XCDR (elt)), | |
16604 | XCDR (XCDR (elt)), risky); | |
5f5c8ee5 GM |
16605 | } |
16606 | else if (SYMBOLP (car)) | |
a2889657 JB |
16607 | { |
16608 | tem = Fboundp (car); | |
9472f927 | 16609 | elt = XCDR (elt); |
e24c997d | 16610 | if (!CONSP (elt)) |
a2889657 JB |
16611 | goto invalid; |
16612 | /* elt is now the cdr, and we know it is a cons cell. | |
16613 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 16614 | if (!NILP (tem)) |
a2889657 JB |
16615 | { |
16616 | tem = Fsymbol_value (car); | |
265a9e55 | 16617 | if (!NILP (tem)) |
9472f927 GM |
16618 | { |
16619 | elt = XCAR (elt); | |
16620 | goto tail_recurse; | |
16621 | } | |
a2889657 JB |
16622 | } |
16623 | /* Symbol's value is nil (or symbol is unbound) | |
16624 | Get the cddr of the original list | |
16625 | and if possible find the caddr and use that. */ | |
9472f927 | 16626 | elt = XCDR (elt); |
265a9e55 | 16627 | if (NILP (elt)) |
a2889657 | 16628 | break; |
e24c997d | 16629 | else if (!CONSP (elt)) |
a2889657 | 16630 | goto invalid; |
9472f927 | 16631 | elt = XCAR (elt); |
a2889657 JB |
16632 | goto tail_recurse; |
16633 | } | |
e24c997d | 16634 | else if (INTEGERP (car)) |
a2889657 JB |
16635 | { |
16636 | register int lim = XINT (car); | |
9472f927 | 16637 | elt = XCDR (elt); |
a2889657 | 16638 | if (lim < 0) |
5f5c8ee5 GM |
16639 | { |
16640 | /* Negative int means reduce maximum width. */ | |
16641 | if (precision <= 0) | |
16642 | precision = -lim; | |
16643 | else | |
16644 | precision = min (precision, -lim); | |
16645 | } | |
a2889657 JB |
16646 | else if (lim > 0) |
16647 | { | |
16648 | /* Padding specified. Don't let it be more than | |
16649 | current maximum. */ | |
5f5c8ee5 GM |
16650 | if (precision > 0) |
16651 | lim = min (precision, lim); | |
16652 | ||
a2889657 JB |
16653 | /* If that's more padding than already wanted, queue it. |
16654 | But don't reduce padding already specified even if | |
16655 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 16656 | field_width = max (lim, field_width); |
a2889657 JB |
16657 | } |
16658 | goto tail_recurse; | |
16659 | } | |
e24c997d | 16660 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
16661 | { |
16662 | register int limit = 50; | |
5f5c8ee5 GM |
16663 | /* Limit is to protect against circular lists. */ |
16664 | while (CONSP (elt) | |
16665 | && --limit > 0 | |
16666 | && (precision <= 0 || n < precision)) | |
a2889657 | 16667 | { |
5c213fcc RS |
16668 | n += display_mode_element (it, depth, |
16669 | /* Do padding only after the last | |
16670 | element in the list. */ | |
16671 | (! CONSP (XCDR (elt)) | |
16672 | ? field_width - n | |
16673 | : 0), | |
c53a1624 RS |
16674 | precision - n, XCAR (elt), |
16675 | props, risky); | |
9472f927 | 16676 | elt = XCDR (elt); |
a2889657 JB |
16677 | } |
16678 | } | |
16679 | } | |
16680 | break; | |
16681 | ||
16682 | default: | |
16683 | invalid: | |
1a89be1e SM |
16684 | elt = build_string ("*invalid*"); |
16685 | goto tail_recurse; | |
a2889657 JB |
16686 | } |
16687 | ||
5f5c8ee5 GM |
16688 | /* Pad to FIELD_WIDTH. */ |
16689 | if (field_width > 0 && n < field_width) | |
16690 | { | |
4c0e4b80 KS |
16691 | switch (mode_line_target) |
16692 | { | |
16693 | case MODE_LINE_NOPROP: | |
16694 | case MODE_LINE_TITLE: | |
16695 | n += store_mode_line_noprop ("", field_width - n, 0); | |
16696 | break; | |
16697 | case MODE_LINE_STRING: | |
16698 | n += store_mode_line_string ("", Qnil, 0, field_width - n, 0, Qnil); | |
16699 | break; | |
16700 | case MODE_LINE_DISPLAY: | |
16701 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
16702 | 0, 0, 0); | |
16703 | break; | |
16704 | } | |
5f5c8ee5 | 16705 | } |
2311178e | 16706 | |
5f5c8ee5 | 16707 | return n; |
a2889657 | 16708 | } |
5f5c8ee5 | 16709 | |
fec8f23e KS |
16710 | /* Store a mode-line string element in mode_line_string_list. |
16711 | ||
16712 | If STRING is non-null, display that C string. Otherwise, the Lisp | |
16713 | string LISP_STRING is displayed. | |
16714 | ||
16715 | FIELD_WIDTH is the minimum number of output glyphs to produce. | |
16716 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
16717 | with spaces. FIELD_WIDTH <= 0 means don't pad. | |
16718 | ||
16719 | PRECISION is the maximum number of characters to output from | |
16720 | STRING. PRECISION <= 0 means don't truncate the string. | |
16721 | ||
16722 | If COPY_STRING is non-zero, make a copy of LISP_STRING before adding | |
16723 | properties to the string. | |
16724 | ||
7d0393cf | 16725 | PROPS are the properties to add to the string. |
fec8f23e KS |
16726 | The mode_line_string_face face property is always added to the string. |
16727 | */ | |
16728 | ||
70567d1c RS |
16729 | static int |
16730 | store_mode_line_string (string, lisp_string, copy_string, field_width, precision, props) | |
fec8f23e KS |
16731 | char *string; |
16732 | Lisp_Object lisp_string; | |
16733 | int copy_string; | |
16734 | int field_width; | |
16735 | int precision; | |
16736 | Lisp_Object props; | |
16737 | { | |
16738 | int len; | |
16739 | int n = 0; | |
16740 | ||
16741 | if (string != NULL) | |
16742 | { | |
16743 | len = strlen (string); | |
16744 | if (precision > 0 && len > precision) | |
16745 | len = precision; | |
16746 | lisp_string = make_string (string, len); | |
16747 | if (NILP (props)) | |
16748 | props = mode_line_string_face_prop; | |
16749 | else if (!NILP (mode_line_string_face)) | |
16750 | { | |
bccf59df | 16751 | Lisp_Object face = Fplist_get (props, Qface); |
fec8f23e KS |
16752 | props = Fcopy_sequence (props); |
16753 | if (NILP (face)) | |
16754 | face = mode_line_string_face; | |
16755 | else | |
16756 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
16757 | props = Fplist_put (props, Qface, face); | |
16758 | } | |
16759 | Fadd_text_properties (make_number (0), make_number (len), | |
16760 | props, lisp_string); | |
16761 | } | |
7d0393cf | 16762 | else |
fec8f23e | 16763 | { |
c8224325 | 16764 | len = XFASTINT (Flength (lisp_string)); |
fec8f23e KS |
16765 | if (precision > 0 && len > precision) |
16766 | { | |
16767 | len = precision; | |
16768 | lisp_string = Fsubstring (lisp_string, make_number (0), make_number (len)); | |
16769 | precision = -1; | |
16770 | } | |
16771 | if (!NILP (mode_line_string_face)) | |
16772 | { | |
16773 | Lisp_Object face; | |
16774 | if (NILP (props)) | |
16775 | props = Ftext_properties_at (make_number (0), lisp_string); | |
bccf59df | 16776 | face = Fplist_get (props, Qface); |
fec8f23e KS |
16777 | if (NILP (face)) |
16778 | face = mode_line_string_face; | |
16779 | else | |
16780 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
16781 | props = Fcons (Qface, Fcons (face, Qnil)); | |
16782 | if (copy_string) | |
16783 | lisp_string = Fcopy_sequence (lisp_string); | |
16784 | } | |
16785 | if (!NILP (props)) | |
16786 | Fadd_text_properties (make_number (0), make_number (len), | |
16787 | props, lisp_string); | |
16788 | } | |
16789 | ||
16790 | if (len > 0) | |
16791 | { | |
16792 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 16793 | n += len; |
fec8f23e KS |
16794 | } |
16795 | ||
16796 | if (field_width > len) | |
16797 | { | |
16798 | field_width -= len; | |
16799 | lisp_string = Fmake_string (make_number (field_width), make_number (' ')); | |
16800 | if (!NILP (props)) | |
16801 | Fadd_text_properties (make_number (0), make_number (field_width), | |
16802 | props, lisp_string); | |
16803 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 16804 | n += field_width; |
fec8f23e KS |
16805 | } |
16806 | ||
16807 | return n; | |
16808 | } | |
16809 | ||
5f5c8ee5 | 16810 | |
8143e6ab | 16811 | DEFUN ("format-mode-line", Fformat_mode_line, Sformat_mode_line, |
8d3ef989 KS |
16812 | 1, 4, 0, |
16813 | doc: /* Format a string out of a mode line format specification. | |
16814 | First arg FORMAT specifies the mode line format (see `mode-line-format' | |
16815 | for details) to use. | |
43facb76 | 16816 | |
8d3ef989 | 16817 | Optional second arg FACE specifies the face property to put |
43facb76 RS |
16818 | on all characters for which no face is specified. |
16819 | t means whatever face the window's mode line currently uses | |
16820 | \(either `mode-line' or `mode-line-inactive', depending). | |
8d3ef989 KS |
16821 | nil means the default is no face property. |
16822 | If FACE is an integer, the value string has no text properties. | |
16823 | ||
16824 | Optional third and fourth args WINDOW and BUFFER specify the window | |
16825 | and buffer to use as the context for the formatting (defaults | |
16826 | are the selected window and the window's buffer). */) | |
16827 | (format, face, window, buffer) | |
16828 | Lisp_Object format, face, window, buffer; | |
8143e6ab KS |
16829 | { |
16830 | struct it it; | |
8143e6ab KS |
16831 | int len; |
16832 | struct window *w; | |
16833 | struct buffer *old_buffer = NULL; | |
8d3ef989 KS |
16834 | int face_id = -1; |
16835 | int no_props = INTEGERP (face); | |
4c0e4b80 KS |
16836 | int count = SPECPDL_INDEX (); |
16837 | Lisp_Object str; | |
d06e3847 | 16838 | int string_start = 0; |
8143e6ab KS |
16839 | |
16840 | if (NILP (window)) | |
16841 | window = selected_window; | |
16842 | CHECK_WINDOW (window); | |
16843 | w = XWINDOW (window); | |
8143e6ab | 16844 | |
8d3ef989 KS |
16845 | if (NILP (buffer)) |
16846 | buffer = w->buffer; | |
16847 | CHECK_BUFFER (buffer); | |
16848 | ||
16849 | if (NILP (format)) | |
16850 | return build_string (""); | |
16851 | ||
16852 | if (no_props) | |
16853 | face = Qnil; | |
43facb76 RS |
16854 | |
16855 | if (!NILP (face)) | |
16856 | { | |
8d3ef989 KS |
16857 | if (EQ (face, Qt)) |
16858 | face = (EQ (window, selected_window) ? Qmode_line : Qmode_line_inactive); | |
16859 | face_id = lookup_named_face (XFRAME (WINDOW_FRAME (w)), face, 0, 0); | |
43facb76 RS |
16860 | } |
16861 | ||
8d3ef989 KS |
16862 | if (face_id < 0) |
16863 | face_id = DEFAULT_FACE_ID; | |
5670531e RS |
16864 | |
16865 | if (XBUFFER (buffer) != current_buffer) | |
4c0e4b80 KS |
16866 | old_buffer = current_buffer; |
16867 | ||
27f8fd99 RS |
16868 | /* Save things including mode_line_proptrans_alist, |
16869 | and set that to nil so that we don't alter the outer value. */ | |
4c0e4b80 | 16870 | record_unwind_protect (unwind_format_mode_line, |
f5b8d5f2 | 16871 | format_mode_line_unwind_data (old_buffer, 1)); |
27f8fd99 | 16872 | mode_line_proptrans_alist = Qnil; |
4c0e4b80 KS |
16873 | |
16874 | if (old_buffer) | |
16875 | set_buffer_internal_1 (XBUFFER (buffer)); | |
8143e6ab | 16876 | |
fec8f23e | 16877 | init_iterator (&it, w, -1, -1, NULL, face_id); |
8143e6ab | 16878 | |
4c0e4b80 | 16879 | if (no_props) |
fec8f23e | 16880 | { |
4c0e4b80 KS |
16881 | mode_line_target = MODE_LINE_NOPROP; |
16882 | mode_line_string_face_prop = Qnil; | |
16883 | mode_line_string_list = Qnil; | |
d06e3847 | 16884 | string_start = MODE_LINE_NOPROP_LEN (0); |
fec8f23e KS |
16885 | } |
16886 | else | |
16887 | { | |
4c0e4b80 | 16888 | mode_line_target = MODE_LINE_STRING; |
fec8f23e | 16889 | mode_line_string_list = Qnil; |
4c0e4b80 KS |
16890 | mode_line_string_face = face; |
16891 | mode_line_string_face_prop | |
16892 | = (NILP (face) ? Qnil : Fcons (Qface, Fcons (face, Qnil))); | |
fec8f23e | 16893 | } |
8143e6ab KS |
16894 | |
16895 | push_frame_kboard (it.f); | |
16896 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); | |
16897 | pop_frame_kboard (); | |
16898 | ||
4c0e4b80 | 16899 | if (no_props) |
fec8f23e | 16900 | { |
d06e3847 KS |
16901 | len = MODE_LINE_NOPROP_LEN (string_start); |
16902 | str = make_string (mode_line_noprop_buf + string_start, len); | |
fec8f23e | 16903 | } |
4c0e4b80 | 16904 | else |
8143e6ab | 16905 | { |
4c0e4b80 KS |
16906 | mode_line_string_list = Fnreverse (mode_line_string_list); |
16907 | str = Fmapconcat (intern ("identity"), mode_line_string_list, | |
16908 | make_string ("", 0)); | |
8143e6ab KS |
16909 | } |
16910 | ||
4c0e4b80 KS |
16911 | unbind_to (count, Qnil); |
16912 | return str; | |
8143e6ab KS |
16913 | } |
16914 | ||
766525bc RS |
16915 | /* Write a null-terminated, right justified decimal representation of |
16916 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
16917 | ||
16918 | static void | |
16919 | pint2str (buf, width, d) | |
16920 | register char *buf; | |
16921 | register int width; | |
16922 | register int d; | |
16923 | { | |
16924 | register char *p = buf; | |
2311178e | 16925 | |
766525bc | 16926 | if (d <= 0) |
5f5c8ee5 | 16927 | *p++ = '0'; |
766525bc | 16928 | else |
5f5c8ee5 | 16929 | { |
766525bc | 16930 | while (d > 0) |
5f5c8ee5 | 16931 | { |
766525bc RS |
16932 | *p++ = d % 10 + '0'; |
16933 | d /= 10; | |
5f5c8ee5 GM |
16934 | } |
16935 | } | |
2311178e | 16936 | |
5f5c8ee5 GM |
16937 | for (width -= (int) (p - buf); width > 0; --width) |
16938 | *p++ = ' '; | |
766525bc RS |
16939 | *p-- = '\0'; |
16940 | while (p > buf) | |
5f5c8ee5 | 16941 | { |
766525bc RS |
16942 | d = *buf; |
16943 | *buf++ = *p; | |
16944 | *p-- = d; | |
5f5c8ee5 | 16945 | } |
766525bc RS |
16946 | } |
16947 | ||
525b8b09 LK |
16948 | /* Write a null-terminated, right justified decimal and "human |
16949 | readable" representation of the nonnegative integer D to BUF using | |
16950 | a minimal field width WIDTH. D should be smaller than 999.5e24. */ | |
16951 | ||
16952 | static const char power_letter[] = | |
16953 | { | |
16954 | 0, /* not used */ | |
16955 | 'k', /* kilo */ | |
16956 | 'M', /* mega */ | |
16957 | 'G', /* giga */ | |
16958 | 'T', /* tera */ | |
16959 | 'P', /* peta */ | |
16960 | 'E', /* exa */ | |
16961 | 'Z', /* zetta */ | |
16962 | 'Y' /* yotta */ | |
16963 | }; | |
16964 | ||
16965 | static void | |
16966 | pint2hrstr (buf, width, d) | |
16967 | char *buf; | |
16968 | int width; | |
16969 | int d; | |
16970 | { | |
16971 | /* We aim to represent the nonnegative integer D as | |
16972 | QUOTIENT.TENTHS * 10 ^ (3 * EXPONENT). */ | |
16973 | int quotient = d; | |
16974 | int remainder = 0; | |
16975 | /* -1 means: do not use TENTHS. */ | |
16976 | int tenths = -1; | |
16977 | int exponent = 0; | |
16978 | ||
16979 | /* Length of QUOTIENT.TENTHS as a string. */ | |
16980 | int length; | |
16981 | ||
16982 | char * psuffix; | |
16983 | char * p; | |
16984 | ||
16985 | if (1000 <= quotient) | |
16986 | { | |
16987 | /* Scale to the appropriate EXPONENT. */ | |
16988 | do | |
16989 | { | |
16990 | remainder = quotient % 1000; | |
16991 | quotient /= 1000; | |
16992 | exponent++; | |
16993 | } | |
16994 | while (1000 <= quotient); | |
16995 | ||
16996 | /* Round to nearest and decide whether to use TENTHS or not. */ | |
16997 | if (quotient <= 9) | |
16998 | { | |
16999 | tenths = remainder / 100; | |
17000 | if (50 <= remainder % 100) | |
0162fa4e KS |
17001 | { |
17002 | if (tenths < 9) | |
17003 | tenths++; | |
17004 | else | |
17005 | { | |
17006 | quotient++; | |
17007 | if (quotient == 10) | |
17008 | tenths = -1; | |
17009 | else | |
17010 | tenths = 0; | |
17011 | } | |
17012 | } | |
525b8b09 LK |
17013 | } |
17014 | else | |
17015 | if (500 <= remainder) | |
0162fa4e KS |
17016 | { |
17017 | if (quotient < 999) | |
17018 | quotient++; | |
17019 | else | |
17020 | { | |
17021 | quotient = 1; | |
17022 | exponent++; | |
17023 | tenths = 0; | |
17024 | } | |
17025 | } | |
525b8b09 LK |
17026 | } |
17027 | ||
17028 | /* Calculate the LENGTH of QUOTIENT.TENTHS as a string. */ | |
17029 | if (tenths == -1 && quotient <= 99) | |
17030 | if (quotient <= 9) | |
17031 | length = 1; | |
17032 | else | |
17033 | length = 2; | |
17034 | else | |
17035 | length = 3; | |
17036 | p = psuffix = buf + max (width, length); | |
17037 | ||
17038 | /* Print EXPONENT. */ | |
17039 | if (exponent) | |
17040 | *psuffix++ = power_letter[exponent]; | |
17041 | *psuffix = '\0'; | |
17042 | ||
17043 | /* Print TENTHS. */ | |
17044 | if (tenths >= 0) | |
17045 | { | |
17046 | *--p = '0' + tenths; | |
17047 | *--p = '.'; | |
17048 | } | |
17049 | ||
17050 | /* Print QUOTIENT. */ | |
17051 | do | |
17052 | { | |
17053 | int digit = quotient % 10; | |
17054 | *--p = '0' + digit; | |
17055 | } | |
17056 | while ((quotient /= 10) != 0); | |
17057 | ||
17058 | /* Print leading spaces. */ | |
17059 | while (buf < p) | |
17060 | *--p = ' '; | |
17061 | } | |
17062 | ||
5f5c8ee5 | 17063 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
17064 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
17065 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
17066 | ||
6693a99a | 17067 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 17068 | |
1c9241f5 KH |
17069 | static char * |
17070 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
17071 | Lisp_Object coding_system; | |
17072 | register char *buf; | |
17073 | int eol_flag; | |
17074 | { | |
1e1078d6 | 17075 | Lisp_Object val; |
916848d8 | 17076 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
50f80c2f | 17077 | const unsigned char *eol_str; |
302f2b38 EZ |
17078 | int eol_str_len; |
17079 | /* The EOL conversion we are using. */ | |
17080 | Lisp_Object eoltype; | |
1e1078d6 | 17081 | |
4a09dee0 | 17082 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 17083 | eoltype = Qnil; |
1c9241f5 | 17084 | |
4a09dee0 | 17085 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 17086 | { |
916848d8 RS |
17087 | if (multibyte) |
17088 | *buf++ = '-'; | |
21e989e3 | 17089 | if (eol_flag) |
302f2b38 | 17090 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 17091 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
17092 | } |
17093 | else | |
17094 | { | |
1e1078d6 RS |
17095 | Lisp_Object eolvalue; |
17096 | ||
17097 | eolvalue = Fget (coding_system, Qeol_type); | |
17098 | ||
916848d8 | 17099 | if (multibyte) |
a61b7058 | 17100 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 17101 | |
1c9241f5 KH |
17102 | if (eol_flag) |
17103 | { | |
1e1078d6 RS |
17104 | /* The EOL conversion that is normal on this system. */ |
17105 | ||
17106 | if (NILP (eolvalue)) /* Not yet decided. */ | |
17107 | eoltype = eol_mnemonic_undecided; | |
17108 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
17109 | eoltype = eol_mnemonic_undecided; | |
17110 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
17111 | eoltype = (XFASTINT (eolvalue) == 0 | |
17112 | ? eol_mnemonic_unix | |
17113 | : (XFASTINT (eolvalue) == 1 | |
17114 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
17115 | } |
17116 | } | |
2311178e | 17117 | |
302f2b38 EZ |
17118 | if (eol_flag) |
17119 | { | |
17120 | /* Mention the EOL conversion if it is not the usual one. */ | |
17121 | if (STRINGP (eoltype)) | |
17122 | { | |
2051c264 GM |
17123 | eol_str = SDATA (eoltype); |
17124 | eol_str_len = SBYTES (eoltype); | |
302f2b38 | 17125 | } |
f30b3499 KH |
17126 | else if (INTEGERP (eoltype) |
17127 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
17128 | { | |
50f80c2f KR |
17129 | unsigned char *tmp = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
17130 | eol_str_len = CHAR_STRING (XINT (eoltype), tmp); | |
17131 | eol_str = tmp; | |
f30b3499 | 17132 | } |
302f2b38 EZ |
17133 | else |
17134 | { | |
17135 | eol_str = invalid_eol_type; | |
17136 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 17137 | } |
f30b3499 | 17138 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 17139 | buf += eol_str_len; |
1c9241f5 | 17140 | } |
302f2b38 | 17141 | |
1c9241f5 KH |
17142 | return buf; |
17143 | } | |
17144 | ||
a2889657 | 17145 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
17146 | generated by character C. PRECISION >= 0 means don't return a |
17147 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 | 17148 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
64b7122d RS |
17149 | if the result is multibyte text. |
17150 | ||
17151 | Note we operate on the current buffer for most purposes, | |
17152 | the exception being w->base_line_pos. */ | |
a2889657 | 17153 | |
11e82b76 JB |
17154 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
17155 | ||
a2889657 | 17156 | static char * |
72f62cb5 | 17157 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 17158 | struct window *w; |
68c45bf0 | 17159 | register int c; |
5f5c8ee5 | 17160 | int field_width, precision; |
72f62cb5 | 17161 | int *multibyte; |
a2889657 | 17162 | { |
0b67772d | 17163 | Lisp_Object obj; |
5f5c8ee5 GM |
17164 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
17165 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
64b7122d | 17166 | struct buffer *b = current_buffer; |
a2889657 | 17167 | |
0b67772d | 17168 | obj = Qnil; |
72f62cb5 | 17169 | *multibyte = 0; |
a2889657 JB |
17170 | |
17171 | switch (c) | |
17172 | { | |
1af9f229 RS |
17173 | case '*': |
17174 | if (!NILP (b->read_only)) | |
17175 | return "%"; | |
17176 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
17177 | return "*"; | |
17178 | return "-"; | |
17179 | ||
17180 | case '+': | |
17181 | /* This differs from %* only for a modified read-only buffer. */ | |
17182 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
17183 | return "*"; | |
17184 | if (!NILP (b->read_only)) | |
17185 | return "%"; | |
17186 | return "-"; | |
17187 | ||
17188 | case '&': | |
17189 | /* This differs from %* in ignoring read-only-ness. */ | |
17190 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
17191 | return "*"; | |
17192 | return "-"; | |
17193 | ||
17194 | case '%': | |
17195 | return "%"; | |
17196 | ||
2311178e | 17197 | case '[': |
1af9f229 RS |
17198 | { |
17199 | int i; | |
17200 | char *p; | |
17201 | ||
17202 | if (command_loop_level > 5) | |
17203 | return "[[[... "; | |
17204 | p = decode_mode_spec_buf; | |
17205 | for (i = 0; i < command_loop_level; i++) | |
17206 | *p++ = '['; | |
17207 | *p = 0; | |
17208 | return decode_mode_spec_buf; | |
17209 | } | |
17210 | ||
2311178e | 17211 | case ']': |
1af9f229 RS |
17212 | { |
17213 | int i; | |
17214 | char *p; | |
17215 | ||
17216 | if (command_loop_level > 5) | |
17217 | return " ...]]]"; | |
17218 | p = decode_mode_spec_buf; | |
17219 | for (i = 0; i < command_loop_level; i++) | |
17220 | *p++ = ']'; | |
17221 | *p = 0; | |
17222 | return decode_mode_spec_buf; | |
17223 | } | |
17224 | ||
17225 | case '-': | |
17226 | { | |
1af9f229 | 17227 | register int i; |
5f5c8ee5 GM |
17228 | |
17229 | /* Let lots_of_dashes be a string of infinite length. */ | |
4c0e4b80 KS |
17230 | if (mode_line_target == MODE_LINE_NOPROP || |
17231 | mode_line_target == MODE_LINE_STRING) | |
fec8f23e | 17232 | return "--"; |
5f5c8ee5 GM |
17233 | if (field_width <= 0 |
17234 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 17235 | { |
5f5c8ee5 GM |
17236 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
17237 | decode_mode_spec_buf[i] = '-'; | |
17238 | decode_mode_spec_buf[i] = '\0'; | |
17239 | return decode_mode_spec_buf; | |
1af9f229 | 17240 | } |
5f5c8ee5 GM |
17241 | else |
17242 | return lots_of_dashes; | |
1af9f229 RS |
17243 | } |
17244 | ||
2311178e | 17245 | case 'b': |
d39b6696 | 17246 | obj = b->name; |
a2889657 JB |
17247 | break; |
17248 | ||
1af9f229 RS |
17249 | case 'c': |
17250 | { | |
2311178e | 17251 | int col = (int) current_column (); /* iftc */ |
ac90c44f | 17252 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 17253 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
17254 | return decode_mode_spec_buf; |
17255 | } | |
17256 | ||
fbfde322 RS |
17257 | case 'e': |
17258 | #ifndef SYSTEM_MALLOC | |
17259 | { | |
f5b8d5f2 | 17260 | if (NILP (Vmemory_full)) |
fbfde322 RS |
17261 | return ""; |
17262 | else | |
17263 | return "!MEM FULL! "; | |
17264 | } | |
17265 | #else | |
17266 | return ""; | |
17267 | #endif | |
17268 | ||
1af9f229 RS |
17269 | case 'F': |
17270 | /* %F displays the frame name. */ | |
5f5c8ee5 | 17271 | if (!NILP (f->title)) |
2051c264 | 17272 | return (char *) SDATA (f->title); |
fd8ff63d | 17273 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
2051c264 | 17274 | return (char *) SDATA (f->name); |
9c6da96f | 17275 | return "Emacs"; |
1af9f229 | 17276 | |
2311178e | 17277 | case 'f': |
d39b6696 | 17278 | obj = b->filename; |
a2889657 JB |
17279 | break; |
17280 | ||
525b8b09 LK |
17281 | case 'i': |
17282 | { | |
17283 | int size = ZV - BEGV; | |
17284 | pint2str (decode_mode_spec_buf, field_width, size); | |
17285 | return decode_mode_spec_buf; | |
17286 | } | |
17287 | ||
17288 | case 'I': | |
17289 | { | |
17290 | int size = ZV - BEGV; | |
17291 | pint2hrstr (decode_mode_spec_buf, field_width, size); | |
17292 | return decode_mode_spec_buf; | |
17293 | } | |
17294 | ||
aa6d10fa RS |
17295 | case 'l': |
17296 | { | |
12adba34 RS |
17297 | int startpos = XMARKER (w->start)->charpos; |
17298 | int startpos_byte = marker_byte_position (w->start); | |
17299 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 17300 | int nlines, junk; |
da8b7f4f | 17301 | int height = WINDOW_TOTAL_LINES (w); |
aa6d10fa | 17302 | |
2311178e | 17303 | /* If we decided that this buffer isn't suitable for line numbers, |
aa6d10fa RS |
17304 | don't forget that too fast. */ |
17305 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 17306 | goto no_value; |
5300fd39 RS |
17307 | /* But do forget it, if the window shows a different buffer now. */ |
17308 | else if (BUFFERP (w->base_line_pos)) | |
17309 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
17310 | |
17311 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 17312 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 17313 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
17314 | { |
17315 | w->base_line_pos = Qnil; | |
17316 | w->base_line_number = Qnil; | |
766525bc | 17317 | goto no_value; |
aa6d10fa RS |
17318 | } |
17319 | ||
17320 | if (!NILP (w->base_line_number) | |
17321 | && !NILP (w->base_line_pos) | |
12adba34 | 17322 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
17323 | { |
17324 | line = XFASTINT (w->base_line_number); | |
17325 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 17326 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
17327 | } |
17328 | else | |
17329 | { | |
17330 | line = 1; | |
d39b6696 | 17331 | linepos = BUF_BEGV (b); |
12adba34 | 17332 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
17333 | } |
17334 | ||
17335 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
17336 | nlines = display_count_lines (linepos, linepos_byte, |
17337 | startpos_byte, | |
17338 | startpos, &junk); | |
aa6d10fa RS |
17339 | |
17340 | topline = nlines + line; | |
17341 | ||
17342 | /* Determine a new base line, if the old one is too close | |
17343 | or too far away, or if we did not have one. | |
17344 | "Too close" means it's plausible a scroll-down would | |
17345 | go back past it. */ | |
d39b6696 | 17346 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 17347 | { |
ac90c44f GM |
17348 | w->base_line_number = make_number (topline); |
17349 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
17350 | } |
17351 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 17352 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 17353 | { |
d39b6696 | 17354 | int limit = BUF_BEGV (b); |
12adba34 | 17355 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 17356 | int position; |
5d121aec | 17357 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
17358 | |
17359 | if (startpos - distance > limit) | |
12adba34 RS |
17360 | { |
17361 | limit = startpos - distance; | |
17362 | limit_byte = CHAR_TO_BYTE (limit); | |
17363 | } | |
aa6d10fa | 17364 | |
12adba34 RS |
17365 | nlines = display_count_lines (startpos, startpos_byte, |
17366 | limit_byte, | |
17367 | - (height * 2 + 30), | |
aa6d10fa | 17368 | &position); |
2311178e | 17369 | /* If we couldn't find the lines we wanted within |
5d121aec | 17370 | line_number_display_limit_width chars per line, |
aa6d10fa | 17371 | give up on line numbers for this window. */ |
12adba34 | 17372 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
17373 | { |
17374 | w->base_line_pos = w->buffer; | |
17375 | w->base_line_number = Qnil; | |
766525bc | 17376 | goto no_value; |
aa6d10fa RS |
17377 | } |
17378 | ||
ac90c44f GM |
17379 | w->base_line_number = make_number (topline - nlines); |
17380 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
17381 | } |
17382 | ||
17383 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
17384 | nlines = display_count_lines (startpos, startpos_byte, |
17385 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
17386 | |
17387 | /* Record that we did display the line number. */ | |
17388 | line_number_displayed = 1; | |
17389 | ||
17390 | /* Make the string to show. */ | |
5f5c8ee5 | 17391 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 17392 | return decode_mode_spec_buf; |
766525bc RS |
17393 | no_value: |
17394 | { | |
17395 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
17396 | int pad = field_width - 2; |
17397 | while (pad-- > 0) | |
17398 | *p++ = ' '; | |
17399 | *p++ = '?'; | |
b357b9d4 KR |
17400 | *p++ = '?'; |
17401 | *p = '\0'; | |
766525bc RS |
17402 | return decode_mode_spec_buf; |
17403 | } | |
aa6d10fa RS |
17404 | } |
17405 | break; | |
17406 | ||
2311178e | 17407 | case 'm': |
d39b6696 | 17408 | obj = b->mode_name; |
a2889657 JB |
17409 | break; |
17410 | ||
17411 | case 'n': | |
d39b6696 | 17412 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
17413 | return " Narrow"; |
17414 | break; | |
17415 | ||
a2889657 JB |
17416 | case 'p': |
17417 | { | |
17418 | int pos = marker_position (w->start); | |
d39b6696 | 17419 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 17420 | |
d39b6696 | 17421 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 17422 | { |
d39b6696 | 17423 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
17424 | return "All"; |
17425 | else | |
17426 | return "Bottom"; | |
17427 | } | |
d39b6696 | 17428 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
17429 | return "Top"; |
17430 | else | |
17431 | { | |
3c7d31b9 RS |
17432 | if (total > 1000000) |
17433 | /* Do it differently for a large value, to avoid overflow. */ | |
17434 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
17435 | else | |
17436 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
17437 | /* We can't normally display a 3-digit number, |
17438 | so get us a 2-digit number that is close. */ | |
17439 | if (total == 100) | |
17440 | total = 99; | |
17441 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
17442 | return decode_mode_spec_buf; | |
17443 | } | |
17444 | } | |
17445 | ||
8ffcb79f RS |
17446 | /* Display percentage of size above the bottom of the screen. */ |
17447 | case 'P': | |
17448 | { | |
17449 | int toppos = marker_position (w->start); | |
d39b6696 KH |
17450 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
17451 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 17452 | |
d39b6696 | 17453 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 17454 | { |
d39b6696 | 17455 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
17456 | return "All"; |
17457 | else | |
17458 | return "Bottom"; | |
17459 | } | |
17460 | else | |
17461 | { | |
3c7d31b9 RS |
17462 | if (total > 1000000) |
17463 | /* Do it differently for a large value, to avoid overflow. */ | |
17464 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
17465 | else | |
17466 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
17467 | /* We can't normally display a 3-digit number, |
17468 | so get us a 2-digit number that is close. */ | |
17469 | if (total == 100) | |
17470 | total = 99; | |
d39b6696 | 17471 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
17472 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
17473 | else | |
17474 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
17475 | return decode_mode_spec_buf; | |
17476 | } | |
17477 | } | |
17478 | ||
1af9f229 RS |
17479 | case 's': |
17480 | /* status of process */ | |
64b7122d | 17481 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
1af9f229 RS |
17482 | if (NILP (obj)) |
17483 | return "no process"; | |
17484 | #ifdef subprocesses | |
17485 | obj = Fsymbol_name (Fprocess_status (obj)); | |
17486 | #endif | |
17487 | break; | |
d39b6696 | 17488 | |
1af9f229 RS |
17489 | case 't': /* indicate TEXT or BINARY */ |
17490 | #ifdef MODE_LINE_BINARY_TEXT | |
17491 | return MODE_LINE_BINARY_TEXT (b); | |
17492 | #else | |
17493 | return "T"; | |
17494 | #endif | |
1c9241f5 KH |
17495 | |
17496 | case 'z': | |
17497 | /* coding-system (not including end-of-line format) */ | |
17498 | case 'Z': | |
17499 | /* coding-system (including end-of-line type) */ | |
17500 | { | |
17501 | int eol_flag = (c == 'Z'); | |
539b4d41 | 17502 | char *p = decode_mode_spec_buf; |
1c9241f5 | 17503 | |
d30e754b | 17504 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 17505 | { |
11c52c4f RS |
17506 | /* No need to mention EOL here--the terminal never needs |
17507 | to do EOL conversion. */ | |
17508 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
17509 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 17510 | } |
f13c925f | 17511 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 17512 | p, eol_flag); |
f13c925f | 17513 | |
11c52c4f | 17514 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
17515 | #ifdef subprocesses |
17516 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
17517 | if (PROCESSP (obj)) | |
17518 | { | |
17519 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
17520 | p, eol_flag); | |
17521 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
17522 | p, eol_flag); | |
17523 | } | |
17524 | #endif /* subprocesses */ | |
11c52c4f | 17525 | #endif /* 0 */ |
1c9241f5 KH |
17526 | *p = 0; |
17527 | return decode_mode_spec_buf; | |
17528 | } | |
a2889657 | 17529 | } |
d39b6696 | 17530 | |
e24c997d | 17531 | if (STRINGP (obj)) |
72f62cb5 GM |
17532 | { |
17533 | *multibyte = STRING_MULTIBYTE (obj); | |
2051c264 | 17534 | return (char *) SDATA (obj); |
72f62cb5 | 17535 | } |
a2889657 JB |
17536 | else |
17537 | return ""; | |
17538 | } | |
5f5c8ee5 GM |
17539 | |
17540 | ||
12adba34 RS |
17541 | /* Count up to COUNT lines starting from START / START_BYTE. |
17542 | But don't go beyond LIMIT_BYTE. | |
17543 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 17544 | |
12adba34 | 17545 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
17546 | |
17547 | static int | |
12adba34 RS |
17548 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
17549 | int start, start_byte, limit_byte, count; | |
17550 | int *byte_pos_ptr; | |
59b49f63 | 17551 | { |
59b49f63 RS |
17552 | register unsigned char *cursor; |
17553 | unsigned char *base; | |
17554 | ||
17555 | register int ceiling; | |
17556 | register unsigned char *ceiling_addr; | |
12adba34 | 17557 | int orig_count = count; |
59b49f63 RS |
17558 | |
17559 | /* If we are not in selective display mode, | |
17560 | check only for newlines. */ | |
12adba34 RS |
17561 | int selective_display = (!NILP (current_buffer->selective_display) |
17562 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
17563 | |
17564 | if (count > 0) | |
12adba34 RS |
17565 | { |
17566 | while (start_byte < limit_byte) | |
17567 | { | |
17568 | ceiling = BUFFER_CEILING_OF (start_byte); | |
17569 | ceiling = min (limit_byte - 1, ceiling); | |
17570 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
17571 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
17572 | while (1) | |
17573 | { | |
17574 | if (selective_display) | |
17575 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
17576 | ; | |
17577 | else | |
17578 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
17579 | ; | |
17580 | ||
17581 | if (cursor != ceiling_addr) | |
17582 | { | |
17583 | if (--count == 0) | |
17584 | { | |
17585 | start_byte += cursor - base + 1; | |
17586 | *byte_pos_ptr = start_byte; | |
17587 | return orig_count; | |
17588 | } | |
17589 | else | |
17590 | if (++cursor == ceiling_addr) | |
17591 | break; | |
17592 | } | |
17593 | else | |
17594 | break; | |
17595 | } | |
17596 | start_byte += cursor - base; | |
17597 | } | |
17598 | } | |
59b49f63 RS |
17599 | else |
17600 | { | |
12adba34 RS |
17601 | while (start_byte > limit_byte) |
17602 | { | |
17603 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
17604 | ceiling = max (limit_byte, ceiling); | |
17605 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
17606 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
17607 | while (1) |
17608 | { | |
12adba34 RS |
17609 | if (selective_display) |
17610 | while (--cursor != ceiling_addr | |
17611 | && *cursor != '\n' && *cursor != 015) | |
17612 | ; | |
17613 | else | |
17614 | while (--cursor != ceiling_addr && *cursor != '\n') | |
17615 | ; | |
17616 | ||
59b49f63 RS |
17617 | if (cursor != ceiling_addr) |
17618 | { | |
17619 | if (++count == 0) | |
17620 | { | |
12adba34 RS |
17621 | start_byte += cursor - base + 1; |
17622 | *byte_pos_ptr = start_byte; | |
17623 | /* When scanning backwards, we should | |
17624 | not count the newline posterior to which we stop. */ | |
17625 | return - orig_count - 1; | |
59b49f63 RS |
17626 | } |
17627 | } | |
17628 | else | |
17629 | break; | |
17630 | } | |
12adba34 RS |
17631 | /* Here we add 1 to compensate for the last decrement |
17632 | of CURSOR, which took it past the valid range. */ | |
17633 | start_byte += cursor - base + 1; | |
59b49f63 RS |
17634 | } |
17635 | } | |
17636 | ||
12adba34 | 17637 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 17638 | |
12adba34 RS |
17639 | if (count < 0) |
17640 | return - orig_count + count; | |
17641 | return orig_count - count; | |
aa6d10fa | 17642 | |
12adba34 | 17643 | } |
a2889657 | 17644 | |
a2889657 | 17645 | |
5f5c8ee5 GM |
17646 | \f |
17647 | /*********************************************************************** | |
17648 | Displaying strings | |
17649 | ***********************************************************************/ | |
278feba9 | 17650 | |
5f5c8ee5 | 17651 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 17652 | |
5f5c8ee5 GM |
17653 | If STRING is non-null, display that C string. Otherwise, the Lisp |
17654 | string LISP_STRING is displayed. | |
a2889657 | 17655 | |
5f5c8ee5 GM |
17656 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
17657 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
17658 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 17659 | |
5f5c8ee5 GM |
17660 | Display the string in the environment given by IT, but use the |
17661 | standard display table, temporarily. | |
a3788d53 | 17662 | |
5f5c8ee5 GM |
17663 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
17664 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
17665 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
17666 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
2311178e | 17667 | |
5f5c8ee5 GM |
17668 | PRECISION is the maximum number of characters to output from |
17669 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 17670 | |
5f5c8ee5 | 17671 | This is roughly equivalent to printf format specifiers: |
a2889657 | 17672 | |
5f5c8ee5 GM |
17673 | FIELD_WIDTH PRECISION PRINTF |
17674 | ---------------------------------------- | |
17675 | -1 -1 %s | |
17676 | -1 10 %.10s | |
17677 | 10 -1 %10s | |
17678 | 20 10 %20.10s | |
a2889657 | 17679 | |
5f5c8ee5 GM |
17680 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
17681 | display them, and < 0 means obey the current buffer's value of | |
17682 | enable_multibyte_characters. | |
278feba9 | 17683 | |
5f5c8ee5 | 17684 | Value is the number of glyphs produced. */ |
b1d1124b | 17685 | |
5f5c8ee5 GM |
17686 | static int |
17687 | display_string (string, lisp_string, face_string, face_string_pos, | |
17688 | start, it, field_width, precision, max_x, multibyte) | |
17689 | unsigned char *string; | |
17690 | Lisp_Object lisp_string; | |
68c45bf0 PE |
17691 | Lisp_Object face_string; |
17692 | int face_string_pos; | |
5f5c8ee5 GM |
17693 | int start; |
17694 | struct it *it; | |
17695 | int field_width, precision, max_x; | |
17696 | int multibyte; | |
17697 | { | |
17698 | int hpos_at_start = it->hpos; | |
17699 | int saved_face_id = it->face_id; | |
17700 | struct glyph_row *row = it->glyph_row; | |
17701 | ||
17702 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 17703 | with index START. */ |
5f5c8ee5 GM |
17704 | reseat_to_string (it, string, lisp_string, start, |
17705 | precision, field_width, multibyte); | |
17706 | ||
17707 | /* If displaying STRING, set up the face of the iterator | |
17708 | from LISP_STRING, if that's given. */ | |
17709 | if (STRINGP (face_string)) | |
17710 | { | |
17711 | int endptr; | |
17712 | struct face *face; | |
2311178e | 17713 | |
5f5c8ee5 GM |
17714 | it->face_id |
17715 | = face_at_string_position (it->w, face_string, face_string_pos, | |
17716 | 0, it->region_beg_charpos, | |
17717 | it->region_end_charpos, | |
5de7c6f2 | 17718 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
17719 | face = FACE_FROM_ID (it->f, it->face_id); |
17720 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 17721 | } |
a2889657 | 17722 | |
5f5c8ee5 GM |
17723 | /* Set max_x to the maximum allowed X position. Don't let it go |
17724 | beyond the right edge of the window. */ | |
17725 | if (max_x <= 0) | |
17726 | max_x = it->last_visible_x; | |
17727 | else | |
17728 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 17729 | |
5f5c8ee5 GM |
17730 | /* Skip over display elements that are not visible. because IT->w is |
17731 | hscrolled. */ | |
17732 | if (it->current_x < it->first_visible_x) | |
17733 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
17734 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 17735 | |
5f5c8ee5 GM |
17736 | row->ascent = it->max_ascent; |
17737 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
17738 | row->phys_ascent = it->max_phys_ascent; |
17739 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
546f98b8 | 17740 | row->extra_line_spacing = it->max_extra_line_spacing; |
1c9241f5 | 17741 | |
5f5c8ee5 GM |
17742 | /* This condition is for the case that we are called with current_x |
17743 | past last_visible_x. */ | |
17744 | while (it->current_x < max_x) | |
a2889657 | 17745 | { |
5f5c8ee5 | 17746 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 17747 | |
5f5c8ee5 GM |
17748 | /* Get the next display element. */ |
17749 | if (!get_next_display_element (it)) | |
90adcf20 | 17750 | break; |
1c9241f5 | 17751 | |
5f5c8ee5 GM |
17752 | /* Produce glyphs. */ |
17753 | x_before = it->current_x; | |
17754 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
17755 | PRODUCE_GLYPHS (it); | |
90adcf20 | 17756 | |
5f5c8ee5 GM |
17757 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
17758 | i = 0; | |
17759 | x = x_before; | |
17760 | while (i < nglyphs) | |
a2889657 | 17761 | { |
5f5c8ee5 | 17762 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
2311178e | 17763 | |
5f5c8ee5 GM |
17764 | if (!it->truncate_lines_p |
17765 | && x + glyph->pixel_width > max_x) | |
17766 | { | |
17767 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
17768 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
17769 | { | |
17770 | /* A wide character is unbreakable. */ | |
17771 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
17772 | it->current_x = x_before; | |
17773 | } | |
17774 | else | |
17775 | { | |
17776 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
17777 | it->current_x = x; | |
17778 | } | |
5f5c8ee5 GM |
17779 | break; |
17780 | } | |
17781 | else if (x + glyph->pixel_width > it->first_visible_x) | |
17782 | { | |
17783 | /* Glyph is at least partially visible. */ | |
17784 | ++it->hpos; | |
17785 | if (x < it->first_visible_x) | |
17786 | it->glyph_row->x = x - it->first_visible_x; | |
17787 | } | |
17788 | else | |
a2889657 | 17789 | { |
5f5c8ee5 GM |
17790 | /* Glyph is off the left margin of the display area. |
17791 | Should not happen. */ | |
17792 | abort (); | |
a2889657 | 17793 | } |
5f5c8ee5 GM |
17794 | |
17795 | row->ascent = max (row->ascent, it->max_ascent); | |
17796 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
17797 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
17798 | row->phys_height = max (row->phys_height, | |
17799 | it->max_phys_ascent + it->max_phys_descent); | |
546f98b8 KS |
17800 | row->extra_line_spacing = max (row->extra_line_spacing, |
17801 | it->max_extra_line_spacing); | |
5f5c8ee5 GM |
17802 | x += glyph->pixel_width; |
17803 | ++i; | |
a2889657 | 17804 | } |
5f5c8ee5 GM |
17805 | |
17806 | /* Stop if max_x reached. */ | |
17807 | if (i < nglyphs) | |
17808 | break; | |
17809 | ||
17810 | /* Stop at line ends. */ | |
17811 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 17812 | { |
5f5c8ee5 GM |
17813 | it->continuation_lines_width = 0; |
17814 | break; | |
a2889657 | 17815 | } |
1c9241f5 | 17816 | |
cafafe0b | 17817 | set_iterator_to_next (it, 1); |
a688bb24 | 17818 | |
5f5c8ee5 GM |
17819 | /* Stop if truncating at the right edge. */ |
17820 | if (it->truncate_lines_p | |
17821 | && it->current_x >= it->last_visible_x) | |
17822 | { | |
17823 | /* Add truncation mark, but don't do it if the line is | |
17824 | truncated at a padding space. */ | |
17825 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 17826 | { |
5f5c8ee5 | 17827 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
17828 | { |
17829 | int i, n; | |
17830 | ||
9299cb15 | 17831 | if (it->current_x > it->last_visible_x) |
37be86f2 | 17832 | { |
9299cb15 KH |
17833 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
17834 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
17835 | break; | |
17836 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
17837 | { | |
17838 | row->used[TEXT_AREA] = i; | |
17839 | produce_special_glyphs (it, IT_TRUNCATION); | |
17840 | } | |
37be86f2 | 17841 | } |
9299cb15 | 17842 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 17843 | } |
5f5c8ee5 | 17844 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 17845 | } |
5f5c8ee5 | 17846 | break; |
1c9241f5 | 17847 | } |
a2889657 JB |
17848 | } |
17849 | ||
5f5c8ee5 GM |
17850 | /* Maybe insert a truncation at the left. */ |
17851 | if (it->first_visible_x | |
17852 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 17853 | { |
5f5c8ee5 GM |
17854 | if (!FRAME_WINDOW_P (it->f)) |
17855 | insert_left_trunc_glyphs (it); | |
17856 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
17857 | } |
17858 | ||
5f5c8ee5 | 17859 | it->face_id = saved_face_id; |
2311178e | 17860 | |
5f5c8ee5 GM |
17861 | /* Value is number of columns displayed. */ |
17862 | return it->hpos - hpos_at_start; | |
17863 | } | |
a2889657 | 17864 | |
a2889657 | 17865 | |
a2889657 | 17866 | \f |
3b6b6db7 | 17867 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
17868 | appears as an element of LIST or as the car of an element of LIST. |
17869 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
17870 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
17871 | Otherwise return 0. This function cannot quit. | |
17872 | The return value is 2 if the text is invisible but with an ellipsis | |
17873 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
17874 | |
17875 | int | |
17876 | invisible_p (propval, list) | |
17877 | register Lisp_Object propval; | |
17878 | Lisp_Object list; | |
17879 | { | |
3b6b6db7 | 17880 | register Lisp_Object tail, proptail; |
2311178e | 17881 | |
3b6b6db7 SM |
17882 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
17883 | { | |
17884 | register Lisp_Object tem; | |
17885 | tem = XCAR (tail); | |
17886 | if (EQ (propval, tem)) | |
17887 | return 1; | |
17888 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
17889 | return NILP (XCDR (tem)) ? 1 : 2; | |
17890 | } | |
2311178e | 17891 | |
3b6b6db7 SM |
17892 | if (CONSP (propval)) |
17893 | { | |
17894 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
17895 | { | |
17896 | Lisp_Object propelt; | |
17897 | propelt = XCAR (proptail); | |
17898 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
17899 | { | |
17900 | register Lisp_Object tem; | |
17901 | tem = XCAR (tail); | |
17902 | if (EQ (propelt, tem)) | |
17903 | return 1; | |
17904 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
17905 | return NILP (XCDR (tem)) ? 1 : 2; | |
17906 | } | |
17907 | } | |
17908 | } | |
2311178e | 17909 | |
3b6b6db7 | 17910 | return 0; |
642eefc6 | 17911 | } |
5f5c8ee5 | 17912 | |
da06e4d7 KS |
17913 | /* Calculate a width or height in pixels from a specification using |
17914 | the following elements: | |
17915 | ||
be21b925 | 17916 | SPEC ::= |
da06e4d7 KS |
17917 | NUM - a (fractional) multiple of the default font width/height |
17918 | (NUM) - specifies exactly NUM pixels | |
17919 | UNIT - a fixed number of pixels, see below. | |
17920 | ELEMENT - size of a display element in pixels, see below. | |
17921 | (NUM . SPEC) - equals NUM * SPEC | |
17922 | (+ SPEC SPEC ...) - add pixel values | |
17923 | (- SPEC SPEC ...) - subtract pixel values | |
17924 | (- SPEC) - negate pixel value | |
17925 | ||
be21b925 | 17926 | NUM ::= |
da06e4d7 KS |
17927 | INT or FLOAT - a number constant |
17928 | SYMBOL - use symbol's (buffer local) variable binding. | |
17929 | ||
17930 | UNIT ::= | |
17931 | in - pixels per inch *) | |
17932 | mm - pixels per 1/1000 meter *) | |
17933 | cm - pixels per 1/100 meter *) | |
17934 | width - width of current font in pixels. | |
17935 | height - height of current font in pixels. | |
17936 | ||
17937 | *) using the ratio(s) defined in display-pixels-per-inch. | |
17938 | ||
17939 | ELEMENT ::= | |
17940 | ||
17941 | left-fringe - left fringe width in pixels | |
17942 | right-fringe - right fringe width in pixels | |
17943 | ||
17944 | left-margin - left margin width in pixels | |
17945 | right-margin - right margin width in pixels | |
17946 | ||
17947 | scroll-bar - scroll-bar area width in pixels | |
17948 | ||
17949 | Examples: | |
17950 | ||
17951 | Pixels corresponding to 5 inches: | |
be21b925 KS |
17952 | (5 . in) |
17953 | ||
da06e4d7 KS |
17954 | Total width of non-text areas on left side of window (if scroll-bar is on left): |
17955 | '(space :width (+ left-fringe left-margin scroll-bar)) | |
17956 | ||
17957 | Align to first text column (in header line): | |
17958 | '(space :align-to 0) | |
17959 | ||
be21b925 | 17960 | Align to middle of text area minus half the width of variable `my-image' |
da06e4d7 KS |
17961 | containing a loaded image: |
17962 | '(space :align-to (0.5 . (- text my-image))) | |
17963 | ||
17964 | Width of left margin minus width of 1 character in the default font: | |
17965 | '(space :width (- left-margin 1)) | |
17966 | ||
17967 | Width of left margin minus width of 2 characters in the current font: | |
17968 | '(space :width (- left-margin (2 . width))) | |
17969 | ||
17970 | Center 1 character over left-margin (in header line): | |
17971 | '(space :align-to (+ left-margin (0.5 . left-margin) -0.5)) | |
17972 | ||
17973 | Different ways to express width of left fringe plus left margin minus one pixel: | |
17974 | '(space :width (- (+ left-fringe left-margin) (1))) | |
17975 | '(space :width (+ left-fringe left-margin (- (1)))) | |
17976 | '(space :width (+ left-fringe left-margin (-1))) | |
17977 | ||
17978 | */ | |
17979 | ||
17980 | #define NUMVAL(X) \ | |
17981 | ((INTEGERP (X) || FLOATP (X)) \ | |
17982 | ? XFLOATINT (X) \ | |
17983 | : - 1) | |
17984 | ||
17985 | int | |
17986 | calc_pixel_width_or_height (res, it, prop, font, width_p, align_to) | |
17987 | double *res; | |
17988 | struct it *it; | |
17989 | Lisp_Object prop; | |
17990 | void *font; | |
17991 | int width_p, *align_to; | |
17992 | { | |
17993 | double pixels; | |
17994 | ||
17995 | #define OK_PIXELS(val) ((*res = (double)(val)), 1) | |
17996 | #define OK_ALIGN_TO(val) ((*align_to = (int)(val)), 1) | |
17997 | ||
17998 | if (NILP (prop)) | |
17999 | return OK_PIXELS (0); | |
18000 | ||
18001 | if (SYMBOLP (prop)) | |
18002 | { | |
18003 | if (SCHARS (SYMBOL_NAME (prop)) == 2) | |
18004 | { | |
18005 | char *unit = SDATA (SYMBOL_NAME (prop)); | |
18006 | ||
18007 | if (unit[0] == 'i' && unit[1] == 'n') | |
18008 | pixels = 1.0; | |
18009 | else if (unit[0] == 'm' && unit[1] == 'm') | |
18010 | pixels = 25.4; | |
18011 | else if (unit[0] == 'c' && unit[1] == 'm') | |
18012 | pixels = 2.54; | |
18013 | else | |
18014 | pixels = 0; | |
18015 | if (pixels > 0) | |
18016 | { | |
18017 | double ppi; | |
c0d7caba KS |
18018 | #ifdef HAVE_WINDOW_SYSTEM |
18019 | if (FRAME_WINDOW_P (it->f) | |
18020 | && (ppi = (width_p | |
18021 | ? FRAME_X_DISPLAY_INFO (it->f)->resx | |
18022 | : FRAME_X_DISPLAY_INFO (it->f)->resy), | |
18023 | ppi > 0)) | |
18024 | return OK_PIXELS (ppi / pixels); | |
18025 | #endif | |
18026 | ||
da06e4d7 KS |
18027 | if ((ppi = NUMVAL (Vdisplay_pixels_per_inch), ppi > 0) |
18028 | || (CONSP (Vdisplay_pixels_per_inch) | |
18029 | && (ppi = (width_p | |
18030 | ? NUMVAL (XCAR (Vdisplay_pixels_per_inch)) | |
18031 | : NUMVAL (XCDR (Vdisplay_pixels_per_inch))), | |
18032 | ppi > 0))) | |
18033 | return OK_PIXELS (ppi / pixels); | |
18034 | ||
18035 | return 0; | |
18036 | } | |
18037 | } | |
18038 | ||
18039 | #ifdef HAVE_WINDOW_SYSTEM | |
18040 | if (EQ (prop, Qheight)) | |
18041 | return OK_PIXELS (font ? FONT_HEIGHT ((XFontStruct *)font) : FRAME_LINE_HEIGHT (it->f)); | |
18042 | if (EQ (prop, Qwidth)) | |
18043 | return OK_PIXELS (font ? FONT_WIDTH ((XFontStruct *)font) : FRAME_COLUMN_WIDTH (it->f)); | |
18044 | #else | |
18045 | if (EQ (prop, Qheight) || EQ (prop, Qwidth)) | |
18046 | return OK_PIXELS (1); | |
18047 | #endif | |
18048 | ||
18049 | if (EQ (prop, Qtext)) | |
18050 | return OK_PIXELS (width_p | |
18051 | ? window_box_width (it->w, TEXT_AREA) | |
18052 | : WINDOW_BOX_HEIGHT_NO_MODE_LINE (it->w)); | |
18053 | ||
18054 | if (align_to && *align_to < 0) | |
18055 | { | |
18056 | *res = 0; | |
18057 | if (EQ (prop, Qleft)) | |
18058 | return OK_ALIGN_TO (window_box_left_offset (it->w, TEXT_AREA)); | |
18059 | if (EQ (prop, Qright)) | |
18060 | return OK_ALIGN_TO (window_box_right_offset (it->w, TEXT_AREA)); | |
18061 | if (EQ (prop, Qcenter)) | |
18062 | return OK_ALIGN_TO (window_box_left_offset (it->w, TEXT_AREA) | |
18063 | + window_box_width (it->w, TEXT_AREA) / 2); | |
18064 | if (EQ (prop, Qleft_fringe)) | |
18065 | return OK_ALIGN_TO (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (it->w) | |
18066 | ? WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (it->w) | |
18067 | : window_box_right_offset (it->w, LEFT_MARGIN_AREA)); | |
18068 | if (EQ (prop, Qright_fringe)) | |
18069 | return OK_ALIGN_TO (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (it->w) | |
18070 | ? window_box_right_offset (it->w, RIGHT_MARGIN_AREA) | |
18071 | : window_box_right_offset (it->w, TEXT_AREA)); | |
18072 | if (EQ (prop, Qleft_margin)) | |
18073 | return OK_ALIGN_TO (window_box_left_offset (it->w, LEFT_MARGIN_AREA)); | |
18074 | if (EQ (prop, Qright_margin)) | |
18075 | return OK_ALIGN_TO (window_box_left_offset (it->w, RIGHT_MARGIN_AREA)); | |
18076 | if (EQ (prop, Qscroll_bar)) | |
18077 | return OK_ALIGN_TO (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (it->w) | |
18078 | ? 0 | |
18079 | : (window_box_right_offset (it->w, RIGHT_MARGIN_AREA) | |
18080 | + (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (it->w) | |
18081 | ? WINDOW_RIGHT_FRINGE_WIDTH (it->w) | |
18082 | : 0))); | |
18083 | } | |
18084 | else | |
18085 | { | |
18086 | if (EQ (prop, Qleft_fringe)) | |
18087 | return OK_PIXELS (WINDOW_LEFT_FRINGE_WIDTH (it->w)); | |
18088 | if (EQ (prop, Qright_fringe)) | |
18089 | return OK_PIXELS (WINDOW_RIGHT_FRINGE_WIDTH (it->w)); | |
18090 | if (EQ (prop, Qleft_margin)) | |
18091 | return OK_PIXELS (WINDOW_LEFT_MARGIN_WIDTH (it->w)); | |
18092 | if (EQ (prop, Qright_margin)) | |
18093 | return OK_PIXELS (WINDOW_RIGHT_MARGIN_WIDTH (it->w)); | |
18094 | if (EQ (prop, Qscroll_bar)) | |
18095 | return OK_PIXELS (WINDOW_SCROLL_BAR_AREA_WIDTH (it->w)); | |
18096 | } | |
18097 | ||
18098 | prop = Fbuffer_local_value (prop, it->w->buffer); | |
18099 | } | |
18100 | ||
18101 | if (INTEGERP (prop) || FLOATP (prop)) | |
18102 | { | |
18103 | int base_unit = (width_p | |
18104 | ? FRAME_COLUMN_WIDTH (it->f) | |
18105 | : FRAME_LINE_HEIGHT (it->f)); | |
18106 | return OK_PIXELS (XFLOATINT (prop) * base_unit); | |
18107 | } | |
18108 | ||
18109 | if (CONSP (prop)) | |
18110 | { | |
18111 | Lisp_Object car = XCAR (prop); | |
18112 | Lisp_Object cdr = XCDR (prop); | |
18113 | ||
18114 | if (SYMBOLP (car)) | |
18115 | { | |
992126de | 18116 | #ifdef HAVE_WINDOW_SYSTEM |
da06e4d7 KS |
18117 | if (valid_image_p (prop)) |
18118 | { | |
18119 | int id = lookup_image (it->f, prop); | |
18120 | struct image *img = IMAGE_FROM_ID (it->f, id); | |
18121 | ||
18122 | return OK_PIXELS (width_p ? img->width : img->height); | |
18123 | } | |
992126de | 18124 | #endif |
da06e4d7 KS |
18125 | if (EQ (car, Qplus) || EQ (car, Qminus)) |
18126 | { | |
18127 | int first = 1; | |
18128 | double px; | |
18129 | ||
18130 | pixels = 0; | |
18131 | while (CONSP (cdr)) | |
18132 | { | |
18133 | if (!calc_pixel_width_or_height (&px, it, XCAR (cdr), | |
18134 | font, width_p, align_to)) | |
18135 | return 0; | |
18136 | if (first) | |
18137 | pixels = (EQ (car, Qplus) ? px : -px), first = 0; | |
18138 | else | |
18139 | pixels += px; | |
18140 | cdr = XCDR (cdr); | |
18141 | } | |
18142 | if (EQ (car, Qminus)) | |
18143 | pixels = -pixels; | |
18144 | return OK_PIXELS (pixels); | |
18145 | } | |
18146 | ||
18147 | car = Fbuffer_local_value (car, it->w->buffer); | |
18148 | } | |
18149 | ||
18150 | if (INTEGERP (car) || FLOATP (car)) | |
18151 | { | |
18152 | double fact; | |
18153 | pixels = XFLOATINT (car); | |
18154 | if (NILP (cdr)) | |
18155 | return OK_PIXELS (pixels); | |
18156 | if (calc_pixel_width_or_height (&fact, it, cdr, | |
18157 | font, width_p, align_to)) | |
18158 | return OK_PIXELS (pixels * fact); | |
18159 | return 0; | |
18160 | } | |
18161 | ||
18162 | return 0; | |
18163 | } | |
18164 | ||
18165 | return 0; | |
18166 | } | |
18167 | ||
642eefc6 | 18168 | \f |
133c764e KS |
18169 | /*********************************************************************** |
18170 | Glyph Display | |
18171 | ***********************************************************************/ | |
18172 | ||
79fa9e0f KS |
18173 | #ifdef HAVE_WINDOW_SYSTEM |
18174 | ||
133c764e KS |
18175 | #if GLYPH_DEBUG |
18176 | ||
18177 | void | |
18178 | dump_glyph_string (s) | |
18179 | struct glyph_string *s; | |
18180 | { | |
18181 | fprintf (stderr, "glyph string\n"); | |
18182 | fprintf (stderr, " x, y, w, h = %d, %d, %d, %d\n", | |
18183 | s->x, s->y, s->width, s->height); | |
18184 | fprintf (stderr, " ybase = %d\n", s->ybase); | |
18185 | fprintf (stderr, " hl = %d\n", s->hl); | |
18186 | fprintf (stderr, " left overhang = %d, right = %d\n", | |
18187 | s->left_overhang, s->right_overhang); | |
18188 | fprintf (stderr, " nchars = %d\n", s->nchars); | |
18189 | fprintf (stderr, " extends to end of line = %d\n", | |
18190 | s->extends_to_end_of_line_p); | |
18191 | fprintf (stderr, " font height = %d\n", FONT_HEIGHT (s->font)); | |
18192 | fprintf (stderr, " bg width = %d\n", s->background_width); | |
18193 | } | |
18194 | ||
18195 | #endif /* GLYPH_DEBUG */ | |
18196 | ||
18197 | /* Initialize glyph string S. CHAR2B is a suitably allocated vector | |
18198 | of XChar2b structures for S; it can't be allocated in | |
18199 | init_glyph_string because it must be allocated via `alloca'. W | |
18200 | is the window on which S is drawn. ROW and AREA are the glyph row | |
18201 | and area within the row from which S is constructed. START is the | |
18202 | index of the first glyph structure covered by S. HL is a | |
18203 | face-override for drawing S. */ | |
18204 | ||
18205 | #ifdef HAVE_NTGUI | |
18206 | #define OPTIONAL_HDC(hdc) hdc, | |
18207 | #define DECLARE_HDC(hdc) HDC hdc; | |
18208 | #define ALLOCATE_HDC(hdc, f) hdc = get_frame_dc ((f)) | |
18209 | #define RELEASE_HDC(hdc, f) release_frame_dc ((f), (hdc)) | |
18210 | #endif | |
18211 | ||
18212 | #ifndef OPTIONAL_HDC | |
18213 | #define OPTIONAL_HDC(hdc) | |
18214 | #define DECLARE_HDC(hdc) | |
18215 | #define ALLOCATE_HDC(hdc, f) | |
18216 | #define RELEASE_HDC(hdc, f) | |
18217 | #endif | |
18218 | ||
18219 | static void | |
18220 | init_glyph_string (s, OPTIONAL_HDC (hdc) char2b, w, row, area, start, hl) | |
18221 | struct glyph_string *s; | |
18222 | DECLARE_HDC (hdc) | |
18223 | XChar2b *char2b; | |
18224 | struct window *w; | |
18225 | struct glyph_row *row; | |
18226 | enum glyph_row_area area; | |
18227 | int start; | |
18228 | enum draw_glyphs_face hl; | |
18229 | { | |
18230 | bzero (s, sizeof *s); | |
18231 | s->w = w; | |
18232 | s->f = XFRAME (w->frame); | |
18233 | #ifdef HAVE_NTGUI | |
18234 | s->hdc = hdc; | |
18235 | #endif | |
18236 | s->display = FRAME_X_DISPLAY (s->f); | |
18237 | s->window = FRAME_X_WINDOW (s->f); | |
18238 | s->char2b = char2b; | |
18239 | s->hl = hl; | |
18240 | s->row = row; | |
18241 | s->area = area; | |
18242 | s->first_glyph = row->glyphs[area] + start; | |
18243 | s->height = row->height; | |
18244 | s->y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y); | |
18245 | ||
18246 | /* Display the internal border below the tool-bar window. */ | |
94c4db3c SM |
18247 | if (WINDOWP (s->f->tool_bar_window) |
18248 | && s->w == XWINDOW (s->f->tool_bar_window)) | |
133c764e KS |
18249 | s->y -= FRAME_INTERNAL_BORDER_WIDTH (s->f); |
18250 | ||
18251 | s->ybase = s->y + row->ascent; | |
18252 | } | |
18253 | ||
18254 | ||
18255 | /* Append the list of glyph strings with head H and tail T to the list | |
18256 | with head *HEAD and tail *TAIL. Set *HEAD and *TAIL to the result. */ | |
18257 | ||
18258 | static INLINE void | |
18259 | append_glyph_string_lists (head, tail, h, t) | |
18260 | struct glyph_string **head, **tail; | |
18261 | struct glyph_string *h, *t; | |
18262 | { | |
18263 | if (h) | |
18264 | { | |
18265 | if (*head) | |
18266 | (*tail)->next = h; | |
18267 | else | |
18268 | *head = h; | |
18269 | h->prev = *tail; | |
18270 | *tail = t; | |
18271 | } | |
18272 | } | |
18273 | ||
18274 | ||
18275 | /* Prepend the list of glyph strings with head H and tail T to the | |
18276 | list with head *HEAD and tail *TAIL. Set *HEAD and *TAIL to the | |
18277 | result. */ | |
18278 | ||
18279 | static INLINE void | |
18280 | prepend_glyph_string_lists (head, tail, h, t) | |
18281 | struct glyph_string **head, **tail; | |
18282 | struct glyph_string *h, *t; | |
18283 | { | |
18284 | if (h) | |
18285 | { | |
18286 | if (*head) | |
18287 | (*head)->prev = t; | |
18288 | else | |
18289 | *tail = t; | |
18290 | t->next = *head; | |
18291 | *head = h; | |
18292 | } | |
18293 | } | |
18294 | ||
18295 | ||
18296 | /* Append glyph string S to the list with head *HEAD and tail *TAIL. | |
18297 | Set *HEAD and *TAIL to the resulting list. */ | |
18298 | ||
18299 | static INLINE void | |
18300 | append_glyph_string (head, tail, s) | |
18301 | struct glyph_string **head, **tail; | |
18302 | struct glyph_string *s; | |
18303 | { | |
18304 | s->next = s->prev = NULL; | |
18305 | append_glyph_string_lists (head, tail, s, s); | |
18306 | } | |
18307 | ||
18308 | ||
18309 | /* Get face and two-byte form of character glyph GLYPH on frame F. | |
18310 | The encoding of GLYPH->u.ch is returned in *CHAR2B. Value is | |
18311 | a pointer to a realized face that is ready for display. */ | |
18312 | ||
18313 | static INLINE struct face * | |
18314 | get_glyph_face_and_encoding (f, glyph, char2b, two_byte_p) | |
18315 | struct frame *f; | |
18316 | struct glyph *glyph; | |
18317 | XChar2b *char2b; | |
18318 | int *two_byte_p; | |
18319 | { | |
18320 | struct face *face; | |
18321 | ||
18322 | xassert (glyph->type == CHAR_GLYPH); | |
18323 | face = FACE_FROM_ID (f, glyph->face_id); | |
18324 | ||
18325 | if (two_byte_p) | |
18326 | *two_byte_p = 0; | |
18327 | ||
18328 | if (!glyph->multibyte_p) | |
18329 | { | |
18330 | /* Unibyte case. We don't have to encode, but we have to make | |
18331 | sure to use a face suitable for unibyte. */ | |
18332 | STORE_XCHAR2B (char2b, 0, glyph->u.ch); | |
18333 | } | |
18334 | else if (glyph->u.ch < 128 | |
18335 | && glyph->face_id < BASIC_FACE_ID_SENTINEL) | |
18336 | { | |
18337 | /* Case of ASCII in a face known to fit ASCII. */ | |
18338 | STORE_XCHAR2B (char2b, 0, glyph->u.ch); | |
18339 | } | |
18340 | else | |
18341 | { | |
18342 | int c1, c2, charset; | |
18343 | ||
18344 | /* Split characters into bytes. If c2 is -1 afterwards, C is | |
18345 | really a one-byte character so that byte1 is zero. */ | |
18346 | SPLIT_CHAR (glyph->u.ch, charset, c1, c2); | |
18347 | if (c2 > 0) | |
18348 | STORE_XCHAR2B (char2b, c1, c2); | |
18349 | else | |
18350 | STORE_XCHAR2B (char2b, 0, c1); | |
18351 | ||
18352 | /* Maybe encode the character in *CHAR2B. */ | |
18353 | if (charset != CHARSET_ASCII) | |
18354 | { | |
18355 | struct font_info *font_info | |
18356 | = FONT_INFO_FROM_ID (f, face->font_info_id); | |
18357 | if (font_info) | |
18358 | glyph->font_type | |
18359 | = rif->encode_char (glyph->u.ch, char2b, font_info, two_byte_p); | |
18360 | } | |
18361 | } | |
18362 | ||
18363 | /* Make sure X resources of the face are allocated. */ | |
18364 | xassert (face != NULL); | |
18365 | PREPARE_FACE_FOR_DISPLAY (f, face); | |
18366 | return face; | |
18367 | } | |
18368 | ||
18369 | ||
18370 | /* Fill glyph string S with composition components specified by S->cmp. | |
18371 | ||
18372 | FACES is an array of faces for all components of this composition. | |
18373 | S->gidx is the index of the first component for S. | |
a66678fd YM |
18374 | |
18375 | OVERLAPS non-zero means S should draw the foreground only, and use | |
18376 | its physical height for clipping. See also draw_glyphs. | |
133c764e KS |
18377 | |
18378 | Value is the index of a component not in S. */ | |
18379 | ||
18380 | static int | |
a66678fd | 18381 | fill_composite_glyph_string (s, faces, overlaps) |
133c764e KS |
18382 | struct glyph_string *s; |
18383 | struct face **faces; | |
a66678fd | 18384 | int overlaps; |
133c764e KS |
18385 | { |
18386 | int i; | |
18387 | ||
18388 | xassert (s); | |
18389 | ||
a66678fd | 18390 | s->for_overlaps = overlaps; |
133c764e KS |
18391 | |
18392 | s->face = faces[s->gidx]; | |
18393 | s->font = s->face->font; | |
18394 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
18395 | ||
18396 | /* For all glyphs of this composition, starting at the offset | |
18397 | S->gidx, until we reach the end of the definition or encounter a | |
18398 | glyph that requires the different face, add it to S. */ | |
18399 | ++s->nchars; | |
18400 | for (i = s->gidx + 1; i < s->cmp->glyph_len && faces[i] == s->face; ++i) | |
18401 | ++s->nchars; | |
18402 | ||
18403 | /* All glyph strings for the same composition has the same width, | |
18404 | i.e. the width set for the first component of the composition. */ | |
18405 | ||
18406 | s->width = s->first_glyph->pixel_width; | |
18407 | ||
18408 | /* If the specified font could not be loaded, use the frame's | |
18409 | default font, but record the fact that we couldn't load it in | |
18410 | the glyph string so that we can draw rectangles for the | |
18411 | characters of the glyph string. */ | |
18412 | if (s->font == NULL) | |
18413 | { | |
18414 | s->font_not_found_p = 1; | |
18415 | s->font = FRAME_FONT (s->f); | |
18416 | } | |
18417 | ||
18418 | /* Adjust base line for subscript/superscript text. */ | |
18419 | s->ybase += s->first_glyph->voffset; | |
18420 | ||
18421 | xassert (s->face && s->face->gc); | |
18422 | ||
18423 | /* This glyph string must always be drawn with 16-bit functions. */ | |
18424 | s->two_byte_p = 1; | |
18425 | ||
18426 | return s->gidx + s->nchars; | |
18427 | } | |
18428 | ||
18429 | ||
18430 | /* Fill glyph string S from a sequence of character glyphs. | |
18431 | ||
18432 | FACE_ID is the face id of the string. START is the index of the | |
18433 | first glyph to consider, END is the index of the last + 1. | |
a66678fd YM |
18434 | OVERLAPS non-zero means S should draw the foreground only, and use |
18435 | its physical height for clipping. See also draw_glyphs. | |
133c764e KS |
18436 | |
18437 | Value is the index of the first glyph not in S. */ | |
18438 | ||
18439 | static int | |
a66678fd | 18440 | fill_glyph_string (s, face_id, start, end, overlaps) |
133c764e KS |
18441 | struct glyph_string *s; |
18442 | int face_id; | |
a66678fd | 18443 | int start, end, overlaps; |
133c764e KS |
18444 | { |
18445 | struct glyph *glyph, *last; | |
18446 | int voffset; | |
18447 | int glyph_not_available_p; | |
18448 | ||
18449 | xassert (s->f == XFRAME (s->w->frame)); | |
18450 | xassert (s->nchars == 0); | |
18451 | xassert (start >= 0 && end > start); | |
18452 | ||
a66678fd | 18453 | s->for_overlaps = overlaps, |
133c764e KS |
18454 | glyph = s->row->glyphs[s->area] + start; |
18455 | last = s->row->glyphs[s->area] + end; | |
18456 | voffset = glyph->voffset; | |
18457 | ||
18458 | glyph_not_available_p = glyph->glyph_not_available_p; | |
18459 | ||
18460 | while (glyph < last | |
18461 | && glyph->type == CHAR_GLYPH | |
18462 | && glyph->voffset == voffset | |
18463 | /* Same face id implies same font, nowadays. */ | |
18464 | && glyph->face_id == face_id | |
18465 | && glyph->glyph_not_available_p == glyph_not_available_p) | |
18466 | { | |
18467 | int two_byte_p; | |
18468 | ||
18469 | s->face = get_glyph_face_and_encoding (s->f, glyph, | |
18470 | s->char2b + s->nchars, | |
18471 | &two_byte_p); | |
18472 | s->two_byte_p = two_byte_p; | |
18473 | ++s->nchars; | |
18474 | xassert (s->nchars <= end - start); | |
18475 | s->width += glyph->pixel_width; | |
18476 | ++glyph; | |
18477 | } | |
18478 | ||
18479 | s->font = s->face->font; | |
18480 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
18481 | ||
18482 | /* If the specified font could not be loaded, use the frame's font, | |
18483 | but record the fact that we couldn't load it in | |
18484 | S->font_not_found_p so that we can draw rectangles for the | |
18485 | characters of the glyph string. */ | |
18486 | if (s->font == NULL || glyph_not_available_p) | |
18487 | { | |
18488 | s->font_not_found_p = 1; | |
18489 | s->font = FRAME_FONT (s->f); | |
18490 | } | |
18491 | ||
18492 | /* Adjust base line for subscript/superscript text. */ | |
18493 | s->ybase += voffset; | |
18494 | ||
18495 | xassert (s->face && s->face->gc); | |
18496 | return glyph - s->row->glyphs[s->area]; | |
18497 | } | |
18498 | ||
18499 | ||
18500 | /* Fill glyph string S from image glyph S->first_glyph. */ | |
18501 | ||
18502 | static void | |
18503 | fill_image_glyph_string (s) | |
18504 | struct glyph_string *s; | |
18505 | { | |
18506 | xassert (s->first_glyph->type == IMAGE_GLYPH); | |
18507 | s->img = IMAGE_FROM_ID (s->f, s->first_glyph->u.img_id); | |
18508 | xassert (s->img); | |
e893970b | 18509 | s->slice = s->first_glyph->slice; |
133c764e KS |
18510 | s->face = FACE_FROM_ID (s->f, s->first_glyph->face_id); |
18511 | s->font = s->face->font; | |
18512 | s->width = s->first_glyph->pixel_width; | |
18513 | ||
18514 | /* Adjust base line for subscript/superscript text. */ | |
18515 | s->ybase += s->first_glyph->voffset; | |
18516 | } | |
18517 | ||
18518 | ||
18519 | /* Fill glyph string S from a sequence of stretch glyphs. | |
18520 | ||
18521 | ROW is the glyph row in which the glyphs are found, AREA is the | |
18522 | area within the row. START is the index of the first glyph to | |
18523 | consider, END is the index of the last + 1. | |
18524 | ||
18525 | Value is the index of the first glyph not in S. */ | |
18526 | ||
18527 | static int | |
18528 | fill_stretch_glyph_string (s, row, area, start, end) | |
18529 | struct glyph_string *s; | |
18530 | struct glyph_row *row; | |
18531 | enum glyph_row_area area; | |
18532 | int start, end; | |
18533 | { | |
18534 | struct glyph *glyph, *last; | |
18535 | int voffset, face_id; | |
18536 | ||
18537 | xassert (s->first_glyph->type == STRETCH_GLYPH); | |
18538 | ||
18539 | glyph = s->row->glyphs[s->area] + start; | |
18540 | last = s->row->glyphs[s->area] + end; | |
18541 | face_id = glyph->face_id; | |
18542 | s->face = FACE_FROM_ID (s->f, face_id); | |
18543 | s->font = s->face->font; | |
18544 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
18545 | s->width = glyph->pixel_width; | |
18546 | voffset = glyph->voffset; | |
18547 | ||
18548 | for (++glyph; | |
18549 | (glyph < last | |
18550 | && glyph->type == STRETCH_GLYPH | |
18551 | && glyph->voffset == voffset | |
18552 | && glyph->face_id == face_id); | |
18553 | ++glyph) | |
18554 | s->width += glyph->pixel_width; | |
18555 | ||
18556 | /* Adjust base line for subscript/superscript text. */ | |
18557 | s->ybase += voffset; | |
18558 | ||
18559 | /* The case that face->gc == 0 is handled when drawing the glyph | |
18560 | string by calling PREPARE_FACE_FOR_DISPLAY. */ | |
18561 | xassert (s->face); | |
18562 | return glyph - s->row->glyphs[s->area]; | |
18563 | } | |
18564 | ||
18565 | ||
18566 | /* EXPORT for RIF: | |
18567 | Set *LEFT and *RIGHT to the left and right overhang of GLYPH on | |
18568 | frame F. Overhangs of glyphs other than type CHAR_GLYPH are | |
18569 | assumed to be zero. */ | |
18570 | ||
18571 | void | |
18572 | x_get_glyph_overhangs (glyph, f, left, right) | |
18573 | struct glyph *glyph; | |
18574 | struct frame *f; | |
18575 | int *left, *right; | |
18576 | { | |
18577 | *left = *right = 0; | |
18578 | ||
18579 | if (glyph->type == CHAR_GLYPH) | |
18580 | { | |
18581 | XFontStruct *font; | |
18582 | struct face *face; | |
18583 | struct font_info *font_info; | |
18584 | XChar2b char2b; | |
18585 | XCharStruct *pcm; | |
18586 | ||
18587 | face = get_glyph_face_and_encoding (f, glyph, &char2b, NULL); | |
18588 | font = face->font; | |
18589 | font_info = FONT_INFO_FROM_ID (f, face->font_info_id); | |
18590 | if (font /* ++KFS: Should this be font_info ? */ | |
18591 | && (pcm = rif->per_char_metric (font, &char2b, glyph->font_type))) | |
18592 | { | |
18593 | if (pcm->rbearing > pcm->width) | |
18594 | *right = pcm->rbearing - pcm->width; | |
18595 | if (pcm->lbearing < 0) | |
18596 | *left = -pcm->lbearing; | |
18597 | } | |
18598 | } | |
18599 | } | |
18600 | ||
18601 | ||
18602 | /* Return the index of the first glyph preceding glyph string S that | |
18603 | is overwritten by S because of S's left overhang. Value is -1 | |
18604 | if no glyphs are overwritten. */ | |
18605 | ||
18606 | static int | |
18607 | left_overwritten (s) | |
18608 | struct glyph_string *s; | |
18609 | { | |
18610 | int k; | |
18611 | ||
18612 | if (s->left_overhang) | |
18613 | { | |
18614 | int x = 0, i; | |
18615 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
18616 | int first = s->first_glyph - glyphs; | |
18617 | ||
18618 | for (i = first - 1; i >= 0 && x > -s->left_overhang; --i) | |
18619 | x -= glyphs[i].pixel_width; | |
18620 | ||
18621 | k = i + 1; | |
18622 | } | |
18623 | else | |
18624 | k = -1; | |
18625 | ||
18626 | return k; | |
18627 | } | |
18628 | ||
18629 | ||
18630 | /* Return the index of the first glyph preceding glyph string S that | |
18631 | is overwriting S because of its right overhang. Value is -1 if no | |
18632 | glyph in front of S overwrites S. */ | |
18633 | ||
18634 | static int | |
18635 | left_overwriting (s) | |
18636 | struct glyph_string *s; | |
18637 | { | |
18638 | int i, k, x; | |
18639 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
18640 | int first = s->first_glyph - glyphs; | |
18641 | ||
18642 | k = -1; | |
18643 | x = 0; | |
18644 | for (i = first - 1; i >= 0; --i) | |
18645 | { | |
18646 | int left, right; | |
18647 | x_get_glyph_overhangs (glyphs + i, s->f, &left, &right); | |
18648 | if (x + right > 0) | |
18649 | k = i; | |
18650 | x -= glyphs[i].pixel_width; | |
18651 | } | |
18652 | ||
18653 | return k; | |
18654 | } | |
18655 | ||
18656 | ||
18657 | /* Return the index of the last glyph following glyph string S that is | |
18658 | not overwritten by S because of S's right overhang. Value is -1 if | |
18659 | no such glyph is found. */ | |
18660 | ||
18661 | static int | |
18662 | right_overwritten (s) | |
18663 | struct glyph_string *s; | |
18664 | { | |
18665 | int k = -1; | |
18666 | ||
18667 | if (s->right_overhang) | |
18668 | { | |
18669 | int x = 0, i; | |
18670 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
18671 | int first = (s->first_glyph - glyphs) + (s->cmp ? 1 : s->nchars); | |
18672 | int end = s->row->used[s->area]; | |
18673 | ||
18674 | for (i = first; i < end && s->right_overhang > x; ++i) | |
18675 | x += glyphs[i].pixel_width; | |
18676 | ||
18677 | k = i; | |
18678 | } | |
18679 | ||
18680 | return k; | |
18681 | } | |
18682 | ||
18683 | ||
18684 | /* Return the index of the last glyph following glyph string S that | |
18685 | overwrites S because of its left overhang. Value is negative | |
18686 | if no such glyph is found. */ | |
18687 | ||
18688 | static int | |
18689 | right_overwriting (s) | |
18690 | struct glyph_string *s; | |
18691 | { | |
18692 | int i, k, x; | |
18693 | int end = s->row->used[s->area]; | |
18694 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
18695 | int first = (s->first_glyph - glyphs) + (s->cmp ? 1 : s->nchars); | |
18696 | ||
18697 | k = -1; | |
18698 | x = 0; | |
18699 | for (i = first; i < end; ++i) | |
18700 | { | |
18701 | int left, right; | |
18702 | x_get_glyph_overhangs (glyphs + i, s->f, &left, &right); | |
18703 | if (x - left < 0) | |
18704 | k = i; | |
18705 | x += glyphs[i].pixel_width; | |
18706 | } | |
18707 | ||
18708 | return k; | |
18709 | } | |
18710 | ||
18711 | ||
18712 | /* Get face and two-byte form of character C in face FACE_ID on frame | |
18713 | F. The encoding of C is returned in *CHAR2B. MULTIBYTE_P non-zero | |
18714 | means we want to display multibyte text. DISPLAY_P non-zero means | |
18715 | make sure that X resources for the face returned are allocated. | |
18716 | Value is a pointer to a realized face that is ready for display if | |
18717 | DISPLAY_P is non-zero. */ | |
18718 | ||
18719 | static INLINE struct face * | |
18720 | get_char_face_and_encoding (f, c, face_id, char2b, multibyte_p, display_p) | |
18721 | struct frame *f; | |
18722 | int c, face_id; | |
18723 | XChar2b *char2b; | |
18724 | int multibyte_p, display_p; | |
18725 | { | |
18726 | struct face *face = FACE_FROM_ID (f, face_id); | |
18727 | ||
18728 | if (!multibyte_p) | |
18729 | { | |
18730 | /* Unibyte case. We don't have to encode, but we have to make | |
18731 | sure to use a face suitable for unibyte. */ | |
18732 | STORE_XCHAR2B (char2b, 0, c); | |
18733 | face_id = FACE_FOR_CHAR (f, face, c); | |
18734 | face = FACE_FROM_ID (f, face_id); | |
18735 | } | |
18736 | else if (c < 128 && face_id < BASIC_FACE_ID_SENTINEL) | |
18737 | { | |
18738 | /* Case of ASCII in a face known to fit ASCII. */ | |
18739 | STORE_XCHAR2B (char2b, 0, c); | |
18740 | } | |
18741 | else | |
18742 | { | |
18743 | int c1, c2, charset; | |
18744 | ||
18745 | /* Split characters into bytes. If c2 is -1 afterwards, C is | |
18746 | really a one-byte character so that byte1 is zero. */ | |
18747 | SPLIT_CHAR (c, charset, c1, c2); | |
18748 | if (c2 > 0) | |
18749 | STORE_XCHAR2B (char2b, c1, c2); | |
18750 | else | |
18751 | STORE_XCHAR2B (char2b, 0, c1); | |
18752 | ||
18753 | /* Maybe encode the character in *CHAR2B. */ | |
18754 | if (face->font != NULL) | |
18755 | { | |
18756 | struct font_info *font_info | |
18757 | = FONT_INFO_FROM_ID (f, face->font_info_id); | |
18758 | if (font_info) | |
18759 | rif->encode_char (c, char2b, font_info, 0); | |
18760 | } | |
18761 | } | |
18762 | ||
18763 | /* Make sure X resources of the face are allocated. */ | |
18764 | #ifdef HAVE_X_WINDOWS | |
18765 | if (display_p) | |
18766 | #endif | |
18767 | { | |
18768 | xassert (face != NULL); | |
18769 | PREPARE_FACE_FOR_DISPLAY (f, face); | |
18770 | } | |
18771 | ||
18772 | return face; | |
18773 | } | |
18774 | ||
18775 | ||
18776 | /* Set background width of glyph string S. START is the index of the | |
18777 | first glyph following S. LAST_X is the right-most x-position + 1 | |
18778 | in the drawing area. */ | |
18779 | ||
18780 | static INLINE void | |
18781 | set_glyph_string_background_width (s, start, last_x) | |
18782 | struct glyph_string *s; | |
18783 | int start; | |
18784 | int last_x; | |
18785 | { | |
18786 | /* If the face of this glyph string has to be drawn to the end of | |
18787 | the drawing area, set S->extends_to_end_of_line_p. */ | |
133c764e KS |
18788 | |
18789 | if (start == s->row->used[s->area] | |
18790 | && s->area == TEXT_AREA | |
8a955545 KS |
18791 | && ((s->row->fill_line_p |
18792 | && (s->hl == DRAW_NORMAL_TEXT | |
18793 | || s->hl == DRAW_IMAGE_RAISED | |
18794 | || s->hl == DRAW_IMAGE_SUNKEN)) | |
18795 | || s->hl == DRAW_MOUSE_FACE)) | |
18796 | s->extends_to_end_of_line_p = 1; | |
133c764e KS |
18797 | |
18798 | /* If S extends its face to the end of the line, set its | |
18799 | background_width to the distance to the right edge of the drawing | |
18800 | area. */ | |
18801 | if (s->extends_to_end_of_line_p) | |
18802 | s->background_width = last_x - s->x + 1; | |
18803 | else | |
18804 | s->background_width = s->width; | |
18805 | } | |
18806 | ||
18807 | ||
18808 | /* Compute overhangs and x-positions for glyph string S and its | |
18809 | predecessors, or successors. X is the starting x-position for S. | |
18810 | BACKWARD_P non-zero means process predecessors. */ | |
18811 | ||
18812 | static void | |
18813 | compute_overhangs_and_x (s, x, backward_p) | |
18814 | struct glyph_string *s; | |
18815 | int x; | |
18816 | int backward_p; | |
18817 | { | |
18818 | if (backward_p) | |
18819 | { | |
18820 | while (s) | |
18821 | { | |
18822 | if (rif->compute_glyph_string_overhangs) | |
18823 | rif->compute_glyph_string_overhangs (s); | |
18824 | x -= s->width; | |
18825 | s->x = x; | |
18826 | s = s->prev; | |
18827 | } | |
18828 | } | |
18829 | else | |
18830 | { | |
18831 | while (s) | |
18832 | { | |
18833 | if (rif->compute_glyph_string_overhangs) | |
18834 | rif->compute_glyph_string_overhangs (s); | |
18835 | s->x = x; | |
18836 | x += s->width; | |
18837 | s = s->next; | |
18838 | } | |
18839 | } | |
18840 | } | |
18841 | ||
18842 | ||
18843 | ||
fa3c6b4d | 18844 | /* The following macros are only called from draw_glyphs below. |
133c764e KS |
18845 | They reference the following parameters of that function directly: |
18846 | `w', `row', `area', and `overlap_p' | |
18847 | as well as the following local variables: | |
18848 | `s', `f', and `hdc' (in W32) */ | |
18849 | ||
18850 | #ifdef HAVE_NTGUI | |
18851 | /* On W32, silently add local `hdc' variable to argument list of | |
18852 | init_glyph_string. */ | |
18853 | #define INIT_GLYPH_STRING(s, char2b, w, row, area, start, hl) \ | |
18854 | init_glyph_string (s, hdc, char2b, w, row, area, start, hl) | |
18855 | #else | |
18856 | #define INIT_GLYPH_STRING(s, char2b, w, row, area, start, hl) \ | |
18857 | init_glyph_string (s, char2b, w, row, area, start, hl) | |
18858 | #endif | |
18859 | ||
18860 | /* Add a glyph string for a stretch glyph to the list of strings | |
18861 | between HEAD and TAIL. START is the index of the stretch glyph in | |
18862 | row area AREA of glyph row ROW. END is the index of the last glyph | |
18863 | in that glyph row area. X is the current output position assigned | |
18864 | to the new glyph string constructed. HL overrides that face of the | |
18865 | glyph; e.g. it is DRAW_CURSOR if a cursor has to be drawn. LAST_X | |
18866 | is the right-most x-position of the drawing area. */ | |
18867 | ||
18868 | /* SunOS 4 bundled cc, barfed on continuations in the arg lists here | |
18869 | and below -- keep them on one line. */ | |
18870 | #define BUILD_STRETCH_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
18871 | do \ | |
18872 | { \ | |
18873 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
18874 | INIT_GLYPH_STRING (s, NULL, w, row, area, START, HL); \ | |
18875 | START = fill_stretch_glyph_string (s, row, area, START, END); \ | |
18876 | append_glyph_string (&HEAD, &TAIL, s); \ | |
18877 | s->x = (X); \ | |
18878 | } \ | |
18879 | while (0) | |
18880 | ||
18881 | ||
18882 | /* Add a glyph string for an image glyph to the list of strings | |
18883 | between HEAD and TAIL. START is the index of the image glyph in | |
18884 | row area AREA of glyph row ROW. END is the index of the last glyph | |
18885 | in that glyph row area. X is the current output position assigned | |
18886 | to the new glyph string constructed. HL overrides that face of the | |
18887 | glyph; e.g. it is DRAW_CURSOR if a cursor has to be drawn. LAST_X | |
18888 | is the right-most x-position of the drawing area. */ | |
18889 | ||
18890 | #define BUILD_IMAGE_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
18891 | do \ | |
18892 | { \ | |
18893 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
18894 | INIT_GLYPH_STRING (s, NULL, w, row, area, START, HL); \ | |
18895 | fill_image_glyph_string (s); \ | |
18896 | append_glyph_string (&HEAD, &TAIL, s); \ | |
18897 | ++START; \ | |
18898 | s->x = (X); \ | |
18899 | } \ | |
18900 | while (0) | |
18901 | ||
18902 | ||
18903 | /* Add a glyph string for a sequence of character glyphs to the list | |
18904 | of strings between HEAD and TAIL. START is the index of the first | |
18905 | glyph in row area AREA of glyph row ROW that is part of the new | |
18906 | glyph string. END is the index of the last glyph in that glyph row | |
18907 | area. X is the current output position assigned to the new glyph | |
18908 | string constructed. HL overrides that face of the glyph; e.g. it | |
18909 | is DRAW_CURSOR if a cursor has to be drawn. LAST_X is the | |
18910 | right-most x-position of the drawing area. */ | |
18911 | ||
18912 | #define BUILD_CHAR_GLYPH_STRINGS(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
18913 | do \ | |
18914 | { \ | |
18915 | int c, face_id; \ | |
18916 | XChar2b *char2b; \ | |
18917 | \ | |
18918 | c = (row)->glyphs[area][START].u.ch; \ | |
18919 | face_id = (row)->glyphs[area][START].face_id; \ | |
18920 | \ | |
18921 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
18922 | char2b = (XChar2b *) alloca ((END - START) * sizeof *char2b); \ | |
18923 | INIT_GLYPH_STRING (s, char2b, w, row, area, START, HL); \ | |
18924 | append_glyph_string (&HEAD, &TAIL, s); \ | |
18925 | s->x = (X); \ | |
a66678fd | 18926 | START = fill_glyph_string (s, face_id, START, END, overlaps); \ |
133c764e KS |
18927 | } \ |
18928 | while (0) | |
18929 | ||
18930 | ||
18931 | /* Add a glyph string for a composite sequence to the list of strings | |
18932 | between HEAD and TAIL. START is the index of the first glyph in | |
18933 | row area AREA of glyph row ROW that is part of the new glyph | |
18934 | string. END is the index of the last glyph in that glyph row area. | |
18935 | X is the current output position assigned to the new glyph string | |
18936 | constructed. HL overrides that face of the glyph; e.g. it is | |
18937 | DRAW_CURSOR if a cursor has to be drawn. LAST_X is the right-most | |
18938 | x-position of the drawing area. */ | |
18939 | ||
18940 | #define BUILD_COMPOSITE_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
18941 | do { \ | |
18942 | int cmp_id = (row)->glyphs[area][START].u.cmp_id; \ | |
18943 | int face_id = (row)->glyphs[area][START].face_id; \ | |
18944 | struct face *base_face = FACE_FROM_ID (f, face_id); \ | |
18945 | struct composition *cmp = composition_table[cmp_id]; \ | |
18946 | int glyph_len = cmp->glyph_len; \ | |
18947 | XChar2b *char2b; \ | |
18948 | struct face **faces; \ | |
18949 | struct glyph_string *first_s = NULL; \ | |
18950 | int n; \ | |
18951 | \ | |
18952 | base_face = base_face->ascii_face; \ | |
18953 | char2b = (XChar2b *) alloca ((sizeof *char2b) * glyph_len); \ | |
18954 | faces = (struct face **) alloca ((sizeof *faces) * glyph_len); \ | |
18955 | /* At first, fill in `char2b' and `faces'. */ \ | |
18956 | for (n = 0; n < glyph_len; n++) \ | |
18957 | { \ | |
18958 | int c = COMPOSITION_GLYPH (cmp, n); \ | |
18959 | int this_face_id = FACE_FOR_CHAR (f, base_face, c); \ | |
18960 | faces[n] = FACE_FROM_ID (f, this_face_id); \ | |
18961 | get_char_face_and_encoding (f, c, this_face_id, \ | |
18962 | char2b + n, 1, 1); \ | |
18963 | } \ | |
18964 | \ | |
18965 | /* Make glyph_strings for each glyph sequence that is drawable by \ | |
18966 | the same face, and append them to HEAD/TAIL. */ \ | |
18967 | for (n = 0; n < cmp->glyph_len;) \ | |
18968 | { \ | |
18969 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
18970 | INIT_GLYPH_STRING (s, char2b + n, w, row, area, START, HL); \ | |
18971 | append_glyph_string (&(HEAD), &(TAIL), s); \ | |
18972 | s->cmp = cmp; \ | |
18973 | s->gidx = n; \ | |
18974 | s->x = (X); \ | |
18975 | \ | |
18976 | if (n == 0) \ | |
18977 | first_s = s; \ | |
18978 | \ | |
a66678fd | 18979 | n = fill_composite_glyph_string (s, faces, overlaps); \ |
133c764e KS |
18980 | } \ |
18981 | \ | |
18982 | ++START; \ | |
18983 | s = first_s; \ | |
18984 | } while (0) | |
18985 | ||
18986 | ||
18987 | /* Build a list of glyph strings between HEAD and TAIL for the glyphs | |
18988 | of AREA of glyph row ROW on window W between indices START and END. | |
18989 | HL overrides the face for drawing glyph strings, e.g. it is | |
18990 | DRAW_CURSOR to draw a cursor. X and LAST_X are start and end | |
18991 | x-positions of the drawing area. | |
18992 | ||
18993 | This is an ugly monster macro construct because we must use alloca | |
fa3c6b4d | 18994 | to allocate glyph strings (because draw_glyphs can be called |
133c764e KS |
18995 | asynchronously). */ |
18996 | ||
18997 | #define BUILD_GLYPH_STRINGS(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
18998 | do \ | |
18999 | { \ | |
19000 | HEAD = TAIL = NULL; \ | |
19001 | while (START < END) \ | |
19002 | { \ | |
19003 | struct glyph *first_glyph = (row)->glyphs[area] + START; \ | |
19004 | switch (first_glyph->type) \ | |
19005 | { \ | |
19006 | case CHAR_GLYPH: \ | |
19007 | BUILD_CHAR_GLYPH_STRINGS (START, END, HEAD, TAIL, \ | |
19008 | HL, X, LAST_X); \ | |
19009 | break; \ | |
19010 | \ | |
19011 | case COMPOSITE_GLYPH: \ | |
19012 | BUILD_COMPOSITE_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
19013 | HL, X, LAST_X); \ | |
19014 | break; \ | |
19015 | \ | |
19016 | case STRETCH_GLYPH: \ | |
19017 | BUILD_STRETCH_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
19018 | HL, X, LAST_X); \ | |
19019 | break; \ | |
19020 | \ | |
19021 | case IMAGE_GLYPH: \ | |
19022 | BUILD_IMAGE_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
19023 | HL, X, LAST_X); \ | |
19024 | break; \ | |
19025 | \ | |
19026 | default: \ | |
19027 | abort (); \ | |
19028 | } \ | |
19029 | \ | |
19030 | set_glyph_string_background_width (s, START, LAST_X); \ | |
19031 | (X) += s->width; \ | |
19032 | } \ | |
19033 | } \ | |
19034 | while (0) | |
19035 | ||
19036 | ||
19037 | /* Draw glyphs between START and END in AREA of ROW on window W, | |
19038 | starting at x-position X. X is relative to AREA in W. HL is a | |
19039 | face-override with the following meaning: | |
19040 | ||
19041 | DRAW_NORMAL_TEXT draw normally | |
19042 | DRAW_CURSOR draw in cursor face | |
19043 | DRAW_MOUSE_FACE draw in mouse face. | |
19044 | DRAW_INVERSE_VIDEO draw in mode line face | |
19045 | DRAW_IMAGE_SUNKEN draw an image with a sunken relief around it | |
19046 | DRAW_IMAGE_RAISED draw an image with a raised relief around it | |
19047 | ||
a66678fd YM |
19048 | If OVERLAPS is non-zero, draw only the foreground of characters and |
19049 | clip to the physical height of ROW. Non-zero value also defines | |
19050 | the overlapping part to be drawn: | |
19051 | ||
19052 | OVERLAPS_PRED overlap with preceding rows | |
19053 | OVERLAPS_SUCC overlap with succeeding rows | |
19054 | OVERLAPS_BOTH overlap with both preceding/succeeding rows | |
19055 | OVERLAPS_ERASED_CURSOR overlap with erased cursor area | |
133c764e KS |
19056 | |
19057 | Value is the x-position reached, relative to AREA of W. */ | |
19058 | ||
fa3c6b4d | 19059 | static int |
a66678fd | 19060 | draw_glyphs (w, x, row, area, start, end, hl, overlaps) |
133c764e KS |
19061 | struct window *w; |
19062 | int x; | |
19063 | struct glyph_row *row; | |
19064 | enum glyph_row_area area; | |
19065 | int start, end; | |
19066 | enum draw_glyphs_face hl; | |
a66678fd | 19067 | int overlaps; |
133c764e KS |
19068 | { |
19069 | struct glyph_string *head, *tail; | |
19070 | struct glyph_string *s; | |
8c2da0fa | 19071 | struct glyph_string *clip_head = NULL, *clip_tail = NULL; |
133c764e KS |
19072 | int last_x, area_width; |
19073 | int x_reached; | |
19074 | int i, j; | |
19075 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
19076 | DECLARE_HDC (hdc); | |
19077 | ||
19078 | ALLOCATE_HDC (hdc, f); | |
19079 | ||
19080 | /* Let's rather be paranoid than getting a SEGV. */ | |
19081 | end = min (end, row->used[area]); | |
19082 | start = max (0, start); | |
19083 | start = min (end, start); | |
19084 | ||
19085 | /* Translate X to frame coordinates. Set last_x to the right | |
19086 | end of the drawing area. */ | |
19087 | if (row->full_width_p) | |
19088 | { | |
19089 | /* X is relative to the left edge of W, without scroll bars | |
19090 | or fringes. */ | |
da8b7f4f KS |
19091 | x += WINDOW_LEFT_EDGE_X (w); |
19092 | last_x = WINDOW_LEFT_EDGE_X (w) + WINDOW_TOTAL_WIDTH (w); | |
133c764e KS |
19093 | } |
19094 | else | |
19095 | { | |
da8b7f4f KS |
19096 | int area_left = window_box_left (w, area); |
19097 | x += area_left; | |
133c764e | 19098 | area_width = window_box_width (w, area); |
da8b7f4f | 19099 | last_x = area_left + area_width; |
133c764e KS |
19100 | } |
19101 | ||
19102 | /* Build a doubly-linked list of glyph_string structures between | |
19103 | head and tail from what we have to draw. Note that the macro | |
19104 | BUILD_GLYPH_STRINGS will modify its start parameter. That's | |
19105 | the reason we use a separate variable `i'. */ | |
19106 | i = start; | |
19107 | BUILD_GLYPH_STRINGS (i, end, head, tail, hl, x, last_x); | |
19108 | if (tail) | |
19109 | x_reached = tail->x + tail->background_width; | |
19110 | else | |
19111 | x_reached = x; | |
19112 | ||
19113 | /* If there are any glyphs with lbearing < 0 or rbearing > width in | |
19114 | the row, redraw some glyphs in front or following the glyph | |
19115 | strings built above. */ | |
a66678fd | 19116 | if (head && !overlaps && row->contains_overlapping_glyphs_p) |
133c764e KS |
19117 | { |
19118 | int dummy_x = 0; | |
19119 | struct glyph_string *h, *t; | |
19120 | ||
19121 | /* Compute overhangs for all glyph strings. */ | |
19122 | if (rif->compute_glyph_string_overhangs) | |
19123 | for (s = head; s; s = s->next) | |
19124 | rif->compute_glyph_string_overhangs (s); | |
19125 | ||
19126 | /* Prepend glyph strings for glyphs in front of the first glyph | |
19127 | string that are overwritten because of the first glyph | |
19128 | string's left overhang. The background of all strings | |
19129 | prepended must be drawn because the first glyph string | |
19130 | draws over it. */ | |
19131 | i = left_overwritten (head); | |
19132 | if (i >= 0) | |
19133 | { | |
19134 | j = i; | |
19135 | BUILD_GLYPH_STRINGS (j, start, h, t, | |
19136 | DRAW_NORMAL_TEXT, dummy_x, last_x); | |
19137 | start = i; | |
19138 | compute_overhangs_and_x (t, head->x, 1); | |
19139 | prepend_glyph_string_lists (&head, &tail, h, t); | |
8c2da0fa | 19140 | clip_head = head; |
133c764e KS |
19141 | } |
19142 | ||
19143 | /* Prepend glyph strings for glyphs in front of the first glyph | |
19144 | string that overwrite that glyph string because of their | |
19145 | right overhang. For these strings, only the foreground must | |
19146 | be drawn, because it draws over the glyph string at `head'. | |
19147 | The background must not be drawn because this would overwrite | |
19148 | right overhangs of preceding glyphs for which no glyph | |
19149 | strings exist. */ | |
19150 | i = left_overwriting (head); | |
19151 | if (i >= 0) | |
19152 | { | |
8c2da0fa | 19153 | clip_head = head; |
133c764e KS |
19154 | BUILD_GLYPH_STRINGS (i, start, h, t, |
19155 | DRAW_NORMAL_TEXT, dummy_x, last_x); | |
19156 | for (s = h; s; s = s->next) | |
19157 | s->background_filled_p = 1; | |
19158 | compute_overhangs_and_x (t, head->x, 1); | |
19159 | prepend_glyph_string_lists (&head, &tail, h, t); | |
19160 | } | |
19161 | ||
19162 | /* Append glyphs strings for glyphs following the last glyph | |
19163 | string tail that are overwritten by tail. The background of | |
19164 | these strings has to be drawn because tail's foreground draws | |
19165 | over it. */ | |
19166 | i = right_overwritten (tail); | |
19167 | if (i >= 0) | |
19168 | { | |
19169 | BUILD_GLYPH_STRINGS (end, i, h, t, | |
19170 | DRAW_NORMAL_TEXT, x, last_x); | |
19171 | compute_overhangs_and_x (h, tail->x + tail->width, 0); | |
19172 | append_glyph_string_lists (&head, &tail, h, t); | |
8c2da0fa | 19173 | clip_tail = tail; |
133c764e KS |
19174 | } |
19175 | ||
19176 | /* Append glyph strings for glyphs following the last glyph | |
19177 | string tail that overwrite tail. The foreground of such | |
19178 | glyphs has to be drawn because it writes into the background | |
19179 | of tail. The background must not be drawn because it could | |
19180 | paint over the foreground of following glyphs. */ | |
19181 | i = right_overwriting (tail); | |
19182 | if (i >= 0) | |
19183 | { | |
8c2da0fa | 19184 | clip_tail = tail; |
133c764e KS |
19185 | BUILD_GLYPH_STRINGS (end, i, h, t, |
19186 | DRAW_NORMAL_TEXT, x, last_x); | |
19187 | for (s = h; s; s = s->next) | |
19188 | s->background_filled_p = 1; | |
19189 | compute_overhangs_and_x (h, tail->x + tail->width, 0); | |
19190 | append_glyph_string_lists (&head, &tail, h, t); | |
19191 | } | |
8c2da0fa ST |
19192 | if (clip_head || clip_tail) |
19193 | for (s = head; s; s = s->next) | |
19194 | { | |
19195 | s->clip_head = clip_head; | |
19196 | s->clip_tail = clip_tail; | |
19197 | } | |
133c764e KS |
19198 | } |
19199 | ||
19200 | /* Draw all strings. */ | |
19201 | for (s = head; s; s = s->next) | |
19202 | rif->draw_glyph_string (s); | |
19203 | ||
19204 | if (area == TEXT_AREA | |
19205 | && !row->full_width_p | |
19206 | /* When drawing overlapping rows, only the glyph strings' | |
19207 | foreground is drawn, which doesn't erase a cursor | |
19208 | completely. */ | |
a66678fd | 19209 | && !overlaps) |
133c764e | 19210 | { |
8c2da0fa ST |
19211 | int x0 = clip_head ? clip_head->x : (head ? head->x : x); |
19212 | int x1 = (clip_tail ? clip_tail->x + clip_tail->background_width | |
19213 | : (tail ? tail->x + tail->background_width : x)); | |
133c764e | 19214 | |
da8b7f4f KS |
19215 | int text_left = window_box_left (w, TEXT_AREA); |
19216 | x0 -= text_left; | |
19217 | x1 -= text_left; | |
133c764e | 19218 | |
da8b7f4f | 19219 | notice_overwritten_cursor (w, TEXT_AREA, x0, x1, |
133c764e KS |
19220 | row->y, MATRIX_ROW_BOTTOM_Y (row)); |
19221 | } | |
19222 | ||
19223 | /* Value is the x-position up to which drawn, relative to AREA of W. | |
19224 | This doesn't include parts drawn because of overhangs. */ | |
da8b7f4f KS |
19225 | if (row->full_width_p) |
19226 | x_reached = FRAME_TO_WINDOW_PIXEL_X (w, x_reached); | |
19227 | else | |
19228 | x_reached -= window_box_left (w, area); | |
133c764e KS |
19229 | |
19230 | RELEASE_HDC (hdc, f); | |
19231 | ||
19232 | return x_reached; | |
19233 | } | |
19234 | ||
425daf4a KS |
19235 | /* Expand row matrix if too narrow. Don't expand if area |
19236 | is not present. */ | |
19237 | ||
19238 | #define IT_EXPAND_MATRIX_WIDTH(it, area) \ | |
19239 | { \ | |
19240 | if (!fonts_changed_p \ | |
19241 | && (it->glyph_row->glyphs[area] \ | |
19242 | < it->glyph_row->glyphs[area + 1])) \ | |
19243 | { \ | |
19244 | it->w->ncols_scale_factor++; \ | |
19245 | fonts_changed_p = 1; \ | |
19246 | } \ | |
19247 | } | |
133c764e KS |
19248 | |
19249 | /* Store one glyph for IT->char_to_display in IT->glyph_row. | |
19250 | Called from x_produce_glyphs when IT->glyph_row is non-null. */ | |
19251 | ||
19252 | static INLINE void | |
19253 | append_glyph (it) | |
19254 | struct it *it; | |
19255 | { | |
19256 | struct glyph *glyph; | |
19257 | enum glyph_row_area area = it->area; | |
19258 | ||
19259 | xassert (it->glyph_row); | |
19260 | xassert (it->char_to_display != '\n' && it->char_to_display != '\t'); | |
19261 | ||
19262 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
19263 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
19264 | { | |
19265 | glyph->charpos = CHARPOS (it->position); | |
19266 | glyph->object = it->object; | |
19267 | glyph->pixel_width = it->pixel_width; | |
493fdc3c KS |
19268 | glyph->ascent = it->ascent; |
19269 | glyph->descent = it->descent; | |
133c764e KS |
19270 | glyph->voffset = it->voffset; |
19271 | glyph->type = CHAR_GLYPH; | |
19272 | glyph->multibyte_p = it->multibyte_p; | |
19273 | glyph->left_box_line_p = it->start_of_box_run_p; | |
19274 | glyph->right_box_line_p = it->end_of_box_run_p; | |
19275 | glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent | |
19276 | || it->phys_descent > it->descent); | |
19277 | glyph->padding_p = 0; | |
19278 | glyph->glyph_not_available_p = it->glyph_not_available_p; | |
19279 | glyph->face_id = it->face_id; | |
19280 | glyph->u.ch = it->char_to_display; | |
2883e85a | 19281 | glyph->slice = null_glyph_slice; |
133c764e KS |
19282 | glyph->font_type = FONT_TYPE_UNKNOWN; |
19283 | ++it->glyph_row->used[area]; | |
19284 | } | |
425daf4a KS |
19285 | else |
19286 | IT_EXPAND_MATRIX_WIDTH (it, area); | |
133c764e KS |
19287 | } |
19288 | ||
19289 | /* Store one glyph for the composition IT->cmp_id in IT->glyph_row. | |
19290 | Called from x_produce_glyphs when IT->glyph_row is non-null. */ | |
19291 | ||
19292 | static INLINE void | |
19293 | append_composite_glyph (it) | |
19294 | struct it *it; | |
19295 | { | |
19296 | struct glyph *glyph; | |
19297 | enum glyph_row_area area = it->area; | |
19298 | ||
19299 | xassert (it->glyph_row); | |
19300 | ||
19301 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
19302 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
19303 | { | |
19304 | glyph->charpos = CHARPOS (it->position); | |
19305 | glyph->object = it->object; | |
19306 | glyph->pixel_width = it->pixel_width; | |
493fdc3c KS |
19307 | glyph->ascent = it->ascent; |
19308 | glyph->descent = it->descent; | |
133c764e KS |
19309 | glyph->voffset = it->voffset; |
19310 | glyph->type = COMPOSITE_GLYPH; | |
19311 | glyph->multibyte_p = it->multibyte_p; | |
19312 | glyph->left_box_line_p = it->start_of_box_run_p; | |
19313 | glyph->right_box_line_p = it->end_of_box_run_p; | |
19314 | glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent | |
19315 | || it->phys_descent > it->descent); | |
19316 | glyph->padding_p = 0; | |
19317 | glyph->glyph_not_available_p = 0; | |
19318 | glyph->face_id = it->face_id; | |
19319 | glyph->u.cmp_id = it->cmp_id; | |
2883e85a | 19320 | glyph->slice = null_glyph_slice; |
133c764e KS |
19321 | glyph->font_type = FONT_TYPE_UNKNOWN; |
19322 | ++it->glyph_row->used[area]; | |
19323 | } | |
425daf4a KS |
19324 | else |
19325 | IT_EXPAND_MATRIX_WIDTH (it, area); | |
133c764e KS |
19326 | } |
19327 | ||
19328 | ||
19329 | /* Change IT->ascent and IT->height according to the setting of | |
19330 | IT->voffset. */ | |
19331 | ||
19332 | static INLINE void | |
19333 | take_vertical_position_into_account (it) | |
19334 | struct it *it; | |
19335 | { | |
19336 | if (it->voffset) | |
19337 | { | |
19338 | if (it->voffset < 0) | |
19339 | /* Increase the ascent so that we can display the text higher | |
19340 | in the line. */ | |
e893970b | 19341 | it->ascent -= it->voffset; |
133c764e KS |
19342 | else |
19343 | /* Increase the descent so that we can display the text lower | |
19344 | in the line. */ | |
19345 | it->descent += it->voffset; | |
19346 | } | |
19347 | } | |
19348 | ||
19349 | ||
19350 | /* Produce glyphs/get display metrics for the image IT is loaded with. | |
19351 | See the description of struct display_iterator in dispextern.h for | |
19352 | an overview of struct display_iterator. */ | |
19353 | ||
19354 | static void | |
19355 | produce_image_glyph (it) | |
19356 | struct it *it; | |
19357 | { | |
19358 | struct image *img; | |
19359 | struct face *face; | |
0162fa4e | 19360 | int glyph_ascent; |
e893970b | 19361 | struct glyph_slice slice; |
133c764e KS |
19362 | |
19363 | xassert (it->what == IT_IMAGE); | |
19364 | ||
19365 | face = FACE_FROM_ID (it->f, it->face_id); | |
dd341dd9 KS |
19366 | xassert (face); |
19367 | /* Make sure X resources of the face is loaded. */ | |
19368 | PREPARE_FACE_FOR_DISPLAY (it->f, face); | |
19369 | ||
19370 | if (it->image_id < 0) | |
19371 | { | |
19372 | /* Fringe bitmap. */ | |
351b5434 KS |
19373 | it->ascent = it->phys_ascent = 0; |
19374 | it->descent = it->phys_descent = 0; | |
19375 | it->pixel_width = 0; | |
dd341dd9 KS |
19376 | it->nglyphs = 0; |
19377 | return; | |
19378 | } | |
19379 | ||
133c764e KS |
19380 | img = IMAGE_FROM_ID (it->f, it->image_id); |
19381 | xassert (img); | |
dd341dd9 | 19382 | /* Make sure X resources of the image is loaded. */ |
133c764e KS |
19383 | prepare_image_for_display (it->f, img); |
19384 | ||
e893970b KS |
19385 | slice.x = slice.y = 0; |
19386 | slice.width = img->width; | |
19387 | slice.height = img->height; | |
19388 | ||
19389 | if (INTEGERP (it->slice.x)) | |
19390 | slice.x = XINT (it->slice.x); | |
19391 | else if (FLOATP (it->slice.x)) | |
19392 | slice.x = XFLOAT_DATA (it->slice.x) * img->width; | |
19393 | ||
19394 | if (INTEGERP (it->slice.y)) | |
19395 | slice.y = XINT (it->slice.y); | |
19396 | else if (FLOATP (it->slice.y)) | |
19397 | slice.y = XFLOAT_DATA (it->slice.y) * img->height; | |
19398 | ||
19399 | if (INTEGERP (it->slice.width)) | |
19400 | slice.width = XINT (it->slice.width); | |
19401 | else if (FLOATP (it->slice.width)) | |
19402 | slice.width = XFLOAT_DATA (it->slice.width) * img->width; | |
19403 | ||
19404 | if (INTEGERP (it->slice.height)) | |
19405 | slice.height = XINT (it->slice.height); | |
19406 | else if (FLOATP (it->slice.height)) | |
19407 | slice.height = XFLOAT_DATA (it->slice.height) * img->height; | |
19408 | ||
19409 | if (slice.x >= img->width) | |
19410 | slice.x = img->width; | |
19411 | if (slice.y >= img->height) | |
19412 | slice.y = img->height; | |
19413 | if (slice.x + slice.width >= img->width) | |
19414 | slice.width = img->width - slice.x; | |
19415 | if (slice.y + slice.height > img->height) | |
19416 | slice.height = img->height - slice.y; | |
19417 | ||
19418 | if (slice.width == 0 || slice.height == 0) | |
19419 | return; | |
19420 | ||
19421 | it->ascent = it->phys_ascent = glyph_ascent = image_ascent (img, face, &slice); | |
19422 | ||
19423 | it->descent = slice.height - glyph_ascent; | |
19424 | if (slice.y == 0) | |
19425 | it->descent += img->vmargin; | |
19426 | if (slice.y + slice.height == img->height) | |
19427 | it->descent += img->vmargin; | |
19428 | it->phys_descent = it->descent; | |
19429 | ||
19430 | it->pixel_width = slice.width; | |
19431 | if (slice.x == 0) | |
19432 | it->pixel_width += img->hmargin; | |
19433 | if (slice.x + slice.width == img->width) | |
19434 | it->pixel_width += img->hmargin; | |
133c764e | 19435 | |
7d8a0b55 MB |
19436 | /* It's quite possible for images to have an ascent greater than |
19437 | their height, so don't get confused in that case. */ | |
19438 | if (it->descent < 0) | |
19439 | it->descent = 0; | |
19440 | ||
e893970b | 19441 | #if 0 /* this breaks image tiling */ |
493fdc3c | 19442 | /* If this glyph is alone on the last line, adjust it.ascent to minimum row ascent. */ |
0162fa4e | 19443 | int face_ascent = face->font ? FONT_BASE (face->font) : FRAME_BASELINE_OFFSET (it->f); |
493fdc3c KS |
19444 | if (face_ascent > it->ascent) |
19445 | it->ascent = it->phys_ascent = face_ascent; | |
e893970b | 19446 | #endif |
493fdc3c | 19447 | |
133c764e KS |
19448 | it->nglyphs = 1; |
19449 | ||
19450 | if (face->box != FACE_NO_BOX) | |
19451 | { | |
19452 | if (face->box_line_width > 0) | |
19453 | { | |
e893970b KS |
19454 | if (slice.y == 0) |
19455 | it->ascent += face->box_line_width; | |
19456 | if (slice.y + slice.height == img->height) | |
19457 | it->descent += face->box_line_width; | |
133c764e KS |
19458 | } |
19459 | ||
e893970b | 19460 | if (it->start_of_box_run_p && slice.x == 0) |
133c764e | 19461 | it->pixel_width += abs (face->box_line_width); |
e893970b | 19462 | if (it->end_of_box_run_p && slice.x + slice.width == img->width) |
133c764e KS |
19463 | it->pixel_width += abs (face->box_line_width); |
19464 | } | |
19465 | ||
19466 | take_vertical_position_into_account (it); | |
19467 | ||
19468 | if (it->glyph_row) | |
19469 | { | |
19470 | struct glyph *glyph; | |
19471 | enum glyph_row_area area = it->area; | |
19472 | ||
19473 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
19474 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
19475 | { | |
19476 | glyph->charpos = CHARPOS (it->position); | |
19477 | glyph->object = it->object; | |
19478 | glyph->pixel_width = it->pixel_width; | |
493fdc3c KS |
19479 | glyph->ascent = glyph_ascent; |
19480 | glyph->descent = it->descent; | |
133c764e KS |
19481 | glyph->voffset = it->voffset; |
19482 | glyph->type = IMAGE_GLYPH; | |
19483 | glyph->multibyte_p = it->multibyte_p; | |
19484 | glyph->left_box_line_p = it->start_of_box_run_p; | |
19485 | glyph->right_box_line_p = it->end_of_box_run_p; | |
19486 | glyph->overlaps_vertically_p = 0; | |
19487 | glyph->padding_p = 0; | |
19488 | glyph->glyph_not_available_p = 0; | |
19489 | glyph->face_id = it->face_id; | |
19490 | glyph->u.img_id = img->id; | |
e893970b | 19491 | glyph->slice = slice; |
133c764e KS |
19492 | glyph->font_type = FONT_TYPE_UNKNOWN; |
19493 | ++it->glyph_row->used[area]; | |
19494 | } | |
425daf4a KS |
19495 | else |
19496 | IT_EXPAND_MATRIX_WIDTH (it, area); | |
133c764e KS |
19497 | } |
19498 | } | |
19499 | ||
19500 | ||
19501 | /* Append a stretch glyph to IT->glyph_row. OBJECT is the source | |
19502 | of the glyph, WIDTH and HEIGHT are the width and height of the | |
f65536fa | 19503 | stretch. ASCENT is the ascent of the glyph (0 <= ASCENT <= HEIGHT). */ |
133c764e KS |
19504 | |
19505 | static void | |
19506 | append_stretch_glyph (it, object, width, height, ascent) | |
19507 | struct it *it; | |
19508 | Lisp_Object object; | |
19509 | int width, height; | |
f65536fa | 19510 | int ascent; |
133c764e KS |
19511 | { |
19512 | struct glyph *glyph; | |
19513 | enum glyph_row_area area = it->area; | |
19514 | ||
f65536fa | 19515 | xassert (ascent >= 0 && ascent <= height); |
133c764e KS |
19516 | |
19517 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
19518 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
19519 | { | |
19520 | glyph->charpos = CHARPOS (it->position); | |
19521 | glyph->object = object; | |
19522 | glyph->pixel_width = width; | |
493fdc3c KS |
19523 | glyph->ascent = ascent; |
19524 | glyph->descent = height - ascent; | |
133c764e KS |
19525 | glyph->voffset = it->voffset; |
19526 | glyph->type = STRETCH_GLYPH; | |
19527 | glyph->multibyte_p = it->multibyte_p; | |
19528 | glyph->left_box_line_p = it->start_of_box_run_p; | |
19529 | glyph->right_box_line_p = it->end_of_box_run_p; | |
19530 | glyph->overlaps_vertically_p = 0; | |
19531 | glyph->padding_p = 0; | |
19532 | glyph->glyph_not_available_p = 0; | |
19533 | glyph->face_id = it->face_id; | |
f65536fa | 19534 | glyph->u.stretch.ascent = ascent; |
133c764e | 19535 | glyph->u.stretch.height = height; |
2883e85a | 19536 | glyph->slice = null_glyph_slice; |
133c764e KS |
19537 | glyph->font_type = FONT_TYPE_UNKNOWN; |
19538 | ++it->glyph_row->used[area]; | |
19539 | } | |
425daf4a KS |
19540 | else |
19541 | IT_EXPAND_MATRIX_WIDTH (it, area); | |
133c764e KS |
19542 | } |
19543 | ||
19544 | ||
19545 | /* Produce a stretch glyph for iterator IT. IT->object is the value | |
19546 | of the glyph property displayed. The value must be a list | |
19547 | `(space KEYWORD VALUE ...)' with the following KEYWORD/VALUE pairs | |
19548 | being recognized: | |
19549 | ||
19550 | 1. `:width WIDTH' specifies that the space should be WIDTH * | |
19551 | canonical char width wide. WIDTH may be an integer or floating | |
19552 | point number. | |
19553 | ||
19554 | 2. `:relative-width FACTOR' specifies that the width of the stretch | |
19555 | should be computed from the width of the first character having the | |
19556 | `glyph' property, and should be FACTOR times that width. | |
19557 | ||
19558 | 3. `:align-to HPOS' specifies that the space should be wide enough | |
19559 | to reach HPOS, a value in canonical character units. | |
19560 | ||
19561 | Exactly one of the above pairs must be present. | |
19562 | ||
19563 | 4. `:height HEIGHT' specifies that the height of the stretch produced | |
19564 | should be HEIGHT, measured in canonical character units. | |
19565 | ||
19566 | 5. `:relative-height FACTOR' specifies that the height of the | |
19567 | stretch should be FACTOR times the height of the characters having | |
19568 | the glyph property. | |
19569 | ||
19570 | Either none or exactly one of 4 or 5 must be present. | |
19571 | ||
19572 | 6. `:ascent ASCENT' specifies that ASCENT percent of the height | |
19573 | of the stretch should be used for the ascent of the stretch. | |
19574 | ASCENT must be in the range 0 <= ASCENT <= 100. */ | |
19575 | ||
133c764e KS |
19576 | static void |
19577 | produce_stretch_glyph (it) | |
19578 | struct it *it; | |
19579 | { | |
f65536fa | 19580 | /* (space :width WIDTH :height HEIGHT ...) */ |
133c764e | 19581 | Lisp_Object prop, plist; |
da06e4d7 | 19582 | int width = 0, height = 0, align_to = -1; |
f65536fa KS |
19583 | int zero_width_ok_p = 0, zero_height_ok_p = 0; |
19584 | int ascent = 0; | |
19585 | double tem; | |
133c764e KS |
19586 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
19587 | XFontStruct *font = face->font ? face->font : FRAME_FONT (it->f); | |
19588 | ||
19589 | PREPARE_FACE_FOR_DISPLAY (it->f, face); | |
19590 | ||
19591 | /* List should start with `space'. */ | |
19592 | xassert (CONSP (it->object) && EQ (XCAR (it->object), Qspace)); | |
19593 | plist = XCDR (it->object); | |
19594 | ||
19595 | /* Compute the width of the stretch. */ | |
bccf59df | 19596 | if ((prop = Fplist_get (plist, QCwidth), !NILP (prop)) |
da06e4d7 | 19597 | && calc_pixel_width_or_height (&tem, it, prop, font, 1, 0)) |
f65536fa KS |
19598 | { |
19599 | /* Absolute width `:width WIDTH' specified and valid. */ | |
19600 | zero_width_ok_p = 1; | |
19601 | width = (int)tem; | |
19602 | } | |
bccf59df | 19603 | else if (prop = Fplist_get (plist, QCrelative_width), |
133c764e KS |
19604 | NUMVAL (prop) > 0) |
19605 | { | |
19606 | /* Relative width `:relative-width FACTOR' specified and valid. | |
19607 | Compute the width of the characters having the `glyph' | |
19608 | property. */ | |
19609 | struct it it2; | |
19610 | unsigned char *p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
19611 | ||
19612 | it2 = *it; | |
19613 | if (it->multibyte_p) | |
19614 | { | |
19615 | int maxlen = ((IT_BYTEPOS (*it) >= GPT ? ZV : GPT) | |
19616 | - IT_BYTEPOS (*it)); | |
19617 | it2.c = STRING_CHAR_AND_LENGTH (p, maxlen, it2.len); | |
19618 | } | |
19619 | else | |
19620 | it2.c = *p, it2.len = 1; | |
19621 | ||
19622 | it2.glyph_row = NULL; | |
19623 | it2.what = IT_CHARACTER; | |
19624 | x_produce_glyphs (&it2); | |
19625 | width = NUMVAL (prop) * it2.pixel_width; | |
19626 | } | |
bccf59df | 19627 | else if ((prop = Fplist_get (plist, QCalign_to), !NILP (prop)) |
da06e4d7 KS |
19628 | && calc_pixel_width_or_height (&tem, it, prop, font, 1, &align_to)) |
19629 | { | |
19630 | if (it->glyph_row == NULL || !it->glyph_row->mode_line_p) | |
be21b925 | 19631 | align_to = (align_to < 0 |
da06e4d7 KS |
19632 | ? 0 |
19633 | : align_to - window_box_left_offset (it->w, TEXT_AREA)); | |
19634 | else if (align_to < 0) | |
19635 | align_to = window_box_left_offset (it->w, TEXT_AREA); | |
19636 | width = max (0, (int)tem + align_to - it->current_x); | |
f65536fa KS |
19637 | zero_width_ok_p = 1; |
19638 | } | |
133c764e KS |
19639 | else |
19640 | /* Nothing specified -> width defaults to canonical char width. */ | |
da8b7f4f | 19641 | width = FRAME_COLUMN_WIDTH (it->f); |
133c764e | 19642 | |
f65536fa KS |
19643 | if (width <= 0 && (width < 0 || !zero_width_ok_p)) |
19644 | width = 1; | |
19645 | ||
133c764e | 19646 | /* Compute height. */ |
bccf59df | 19647 | if ((prop = Fplist_get (plist, QCheight), !NILP (prop)) |
da06e4d7 | 19648 | && calc_pixel_width_or_height (&tem, it, prop, font, 0, 0)) |
f65536fa KS |
19649 | { |
19650 | height = (int)tem; | |
19651 | zero_height_ok_p = 1; | |
19652 | } | |
bccf59df | 19653 | else if (prop = Fplist_get (plist, QCrelative_height), |
133c764e KS |
19654 | NUMVAL (prop) > 0) |
19655 | height = FONT_HEIGHT (font) * NUMVAL (prop); | |
19656 | else | |
19657 | height = FONT_HEIGHT (font); | |
19658 | ||
f65536fa KS |
19659 | if (height <= 0 && (height < 0 || !zero_height_ok_p)) |
19660 | height = 1; | |
19661 | ||
133c764e KS |
19662 | /* Compute percentage of height used for ascent. If |
19663 | `:ascent ASCENT' is present and valid, use that. Otherwise, | |
19664 | derive the ascent from the font in use. */ | |
bccf59df | 19665 | if (prop = Fplist_get (plist, QCascent), |
133c764e | 19666 | NUMVAL (prop) > 0 && NUMVAL (prop) <= 100) |
f65536fa KS |
19667 | ascent = height * NUMVAL (prop) / 100.0; |
19668 | else if (!NILP (prop) | |
da06e4d7 | 19669 | && calc_pixel_width_or_height (&tem, it, prop, font, 0, 0)) |
f65536fa | 19670 | ascent = min (max (0, (int)tem), height); |
133c764e | 19671 | else |
f65536fa | 19672 | ascent = (height * FONT_BASE (font)) / FONT_HEIGHT (font); |
133c764e | 19673 | |
f65536fa | 19674 | if (width > 0 && height > 0 && it->glyph_row) |
133c764e KS |
19675 | { |
19676 | Lisp_Object object = it->stack[it->sp - 1].string; | |
19677 | if (!STRINGP (object)) | |
19678 | object = it->w->buffer; | |
19679 | append_stretch_glyph (it, object, width, height, ascent); | |
19680 | } | |
19681 | ||
19682 | it->pixel_width = width; | |
f65536fa | 19683 | it->ascent = it->phys_ascent = ascent; |
133c764e | 19684 | it->descent = it->phys_descent = height - it->ascent; |
f65536fa | 19685 | it->nglyphs = width > 0 && height > 0 ? 1 : 0; |
133c764e | 19686 | |
f65536fa | 19687 | if (width > 0 && height > 0 && face->box != FACE_NO_BOX) |
133c764e KS |
19688 | { |
19689 | if (face->box_line_width > 0) | |
19690 | { | |
19691 | it->ascent += face->box_line_width; | |
19692 | it->descent += face->box_line_width; | |
19693 | } | |
19694 | ||
19695 | if (it->start_of_box_run_p) | |
19696 | it->pixel_width += abs (face->box_line_width); | |
19697 | if (it->end_of_box_run_p) | |
19698 | it->pixel_width += abs (face->box_line_width); | |
19699 | } | |
19700 | ||
19701 | take_vertical_position_into_account (it); | |
19702 | } | |
19703 | ||
99c71e51 KS |
19704 | /* Get line-height and line-spacing property at point. |
19705 | If line-height has format (HEIGHT TOTAL), return TOTAL | |
19706 | in TOTAL_HEIGHT. */ | |
a9e5c932 KS |
19707 | |
19708 | static Lisp_Object | |
99c71e51 | 19709 | get_line_height_property (it, prop) |
a9e5c932 KS |
19710 | struct it *it; |
19711 | Lisp_Object prop; | |
a9e5c932 | 19712 | { |
b78ab259 | 19713 | Lisp_Object position; |
a9e5c932 | 19714 | |
7e1704d0 KS |
19715 | if (STRINGP (it->object)) |
19716 | position = make_number (IT_STRING_CHARPOS (*it)); | |
16fe48b4 | 19717 | else if (BUFFERP (it->object)) |
7e1704d0 | 19718 | position = make_number (IT_CHARPOS (*it)); |
16fe48b4 KS |
19719 | else |
19720 | return Qnil; | |
7e1704d0 | 19721 | |
99c71e51 KS |
19722 | return Fget_char_property (position, prop, it->object); |
19723 | } | |
a9e5c932 | 19724 | |
99c71e51 KS |
19725 | /* Calculate line-height and line-spacing properties. |
19726 | An integer value specifies explicit pixel value. | |
19727 | A float value specifies relative value to current face height. | |
19728 | A cons (float . face-name) specifies relative value to | |
19729 | height of specified face font. | |
a9e5c932 | 19730 | |
99c71e51 | 19731 | Returns height in pixels, or nil. */ |
17b01ffc | 19732 | |
99c71e51 KS |
19733 | |
19734 | static Lisp_Object | |
19735 | calc_line_height_property (it, val, font, boff, override) | |
19736 | struct it *it; | |
19737 | Lisp_Object val; | |
19738 | XFontStruct *font; | |
19739 | int boff, override; | |
19740 | { | |
19741 | Lisp_Object face_name = Qnil; | |
19742 | int ascent, descent, height; | |
19743 | ||
19744 | if (NILP (val) || INTEGERP (val) || (override && EQ (val, Qt))) | |
a9e5c932 KS |
19745 | return val; |
19746 | ||
19747 | if (CONSP (val)) | |
19748 | { | |
99c71e51 KS |
19749 | face_name = XCAR (val); |
19750 | val = XCDR (val); | |
19751 | if (!NUMBERP (val)) | |
19752 | val = make_number (1); | |
19753 | if (NILP (face_name)) | |
19754 | { | |
19755 | height = it->ascent + it->descent; | |
19756 | goto scale; | |
19757 | } | |
a9e5c932 KS |
19758 | } |
19759 | ||
a9e5c932 KS |
19760 | if (NILP (face_name)) |
19761 | { | |
19762 | font = FRAME_FONT (it->f); | |
19763 | boff = FRAME_BASELINE_OFFSET (it->f); | |
19764 | } | |
19765 | else if (EQ (face_name, Qt)) | |
19766 | { | |
19767 | override = 0; | |
19768 | } | |
19769 | else | |
19770 | { | |
19771 | int face_id; | |
19772 | struct face *face; | |
19773 | struct font_info *font_info; | |
19774 | ||
ff7d52cd | 19775 | face_id = lookup_named_face (it->f, face_name, ' ', 0); |
a9e5c932 | 19776 | if (face_id < 0) |
d9bf7950 | 19777 | return make_number (-1); |
a9e5c932 KS |
19778 | |
19779 | face = FACE_FROM_ID (it->f, face_id); | |
19780 | font = face->font; | |
19781 | if (font == NULL) | |
d9bf7950 | 19782 | return make_number (-1); |
a9e5c932 KS |
19783 | |
19784 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
19785 | boff = font_info->baseline_offset; | |
19786 | if (font_info->vertical_centering) | |
19787 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
19788 | } | |
19789 | ||
19790 | ascent = FONT_BASE (font) + boff; | |
19791 | descent = FONT_DESCENT (font) - boff; | |
19792 | ||
19793 | if (override) | |
19794 | { | |
19795 | it->override_ascent = ascent; | |
19796 | it->override_descent = descent; | |
19797 | it->override_boff = boff; | |
19798 | } | |
19799 | ||
19800 | height = ascent + descent; | |
99c71e51 KS |
19801 | |
19802 | scale: | |
a9e5c932 KS |
19803 | if (FLOATP (val)) |
19804 | height = (int)(XFLOAT_DATA (val) * height); | |
19805 | else if (INTEGERP (val)) | |
19806 | height *= XINT (val); | |
19807 | ||
19808 | return make_number (height); | |
19809 | } | |
19810 | ||
19811 | ||
133c764e KS |
19812 | /* RIF: |
19813 | Produce glyphs/get display metrics for the display element IT is | |
19814 | loaded with. See the description of struct display_iterator in | |
19815 | dispextern.h for an overview of struct display_iterator. */ | |
19816 | ||
19817 | void | |
19818 | x_produce_glyphs (it) | |
19819 | struct it *it; | |
19820 | { | |
03e35edc KS |
19821 | int extra_line_spacing = it->extra_line_spacing; |
19822 | ||
133c764e KS |
19823 | it->glyph_not_available_p = 0; |
19824 | ||
19825 | if (it->what == IT_CHARACTER) | |
19826 | { | |
19827 | XChar2b char2b; | |
19828 | XFontStruct *font; | |
19829 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
19830 | XCharStruct *pcm; | |
19831 | int font_not_found_p; | |
19832 | struct font_info *font_info; | |
19833 | int boff; /* baseline offset */ | |
19834 | /* We may change it->multibyte_p upon unibyte<->multibyte | |
19835 | conversion. So, save the current value now and restore it | |
19836 | later. | |
19837 | ||
19838 | Note: It seems that we don't have to record multibyte_p in | |
19839 | struct glyph because the character code itself tells if or | |
19840 | not the character is multibyte. Thus, in the future, we must | |
19841 | consider eliminating the field `multibyte_p' in the struct | |
19842 | glyph. */ | |
19843 | int saved_multibyte_p = it->multibyte_p; | |
19844 | ||
19845 | /* Maybe translate single-byte characters to multibyte, or the | |
19846 | other way. */ | |
19847 | it->char_to_display = it->c; | |
19848 | if (!ASCII_BYTE_P (it->c)) | |
19849 | { | |
19850 | if (unibyte_display_via_language_environment | |
19851 | && SINGLE_BYTE_CHAR_P (it->c) | |
19852 | && (it->c >= 0240 | |
19853 | || !NILP (Vnonascii_translation_table))) | |
19854 | { | |
19855 | it->char_to_display = unibyte_char_to_multibyte (it->c); | |
19856 | it->multibyte_p = 1; | |
19857 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
19858 | face = FACE_FROM_ID (it->f, it->face_id); | |
19859 | } | |
19860 | else if (!SINGLE_BYTE_CHAR_P (it->c) | |
19861 | && !it->multibyte_p) | |
19862 | { | |
19863 | it->multibyte_p = 1; | |
19864 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
19865 | face = FACE_FROM_ID (it->f, it->face_id); | |
19866 | } | |
19867 | } | |
19868 | ||
19869 | /* Get font to use. Encode IT->char_to_display. */ | |
19870 | get_char_face_and_encoding (it->f, it->char_to_display, it->face_id, | |
19871 | &char2b, it->multibyte_p, 0); | |
19872 | font = face->font; | |
19873 | ||
19874 | /* When no suitable font found, use the default font. */ | |
19875 | font_not_found_p = font == NULL; | |
19876 | if (font_not_found_p) | |
19877 | { | |
19878 | font = FRAME_FONT (it->f); | |
19879 | boff = FRAME_BASELINE_OFFSET (it->f); | |
19880 | font_info = NULL; | |
19881 | } | |
19882 | else | |
19883 | { | |
19884 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
19885 | boff = font_info->baseline_offset; | |
19886 | if (font_info->vertical_centering) | |
19887 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
19888 | } | |
19889 | ||
19890 | if (it->char_to_display >= ' ' | |
19891 | && (!it->multibyte_p || it->char_to_display < 128)) | |
19892 | { | |
19893 | /* Either unibyte or ASCII. */ | |
19894 | int stretched_p; | |
19895 | ||
19896 | it->nglyphs = 1; | |
19897 | ||
19898 | pcm = rif->per_char_metric (font, &char2b, | |
19899 | FONT_TYPE_FOR_UNIBYTE (font, it->char_to_display)); | |
e893970b | 19900 | |
a9e5c932 KS |
19901 | if (it->override_ascent >= 0) |
19902 | { | |
19903 | it->ascent = it->override_ascent; | |
19904 | it->descent = it->override_descent; | |
19905 | boff = it->override_boff; | |
19906 | } | |
19907 | else | |
19908 | { | |
19909 | it->ascent = FONT_BASE (font) + boff; | |
19910 | it->descent = FONT_DESCENT (font) - boff; | |
19911 | } | |
133c764e KS |
19912 | |
19913 | if (pcm) | |
19914 | { | |
19915 | it->phys_ascent = pcm->ascent + boff; | |
19916 | it->phys_descent = pcm->descent - boff; | |
19917 | it->pixel_width = pcm->width; | |
19918 | } | |
19919 | else | |
19920 | { | |
19921 | it->glyph_not_available_p = 1; | |
e893970b KS |
19922 | it->phys_ascent = it->ascent; |
19923 | it->phys_descent = it->descent; | |
133c764e KS |
19924 | it->pixel_width = FONT_WIDTH (font); |
19925 | } | |
19926 | ||
e893970b KS |
19927 | if (it->constrain_row_ascent_descent_p) |
19928 | { | |
19929 | if (it->descent > it->max_descent) | |
4933c603 KS |
19930 | { |
19931 | it->ascent += it->descent - it->max_descent; | |
19932 | it->descent = it->max_descent; | |
19933 | } | |
19934 | if (it->ascent > it->max_ascent) | |
19935 | { | |
19936 | it->descent = min (it->max_descent, it->descent + it->ascent - it->max_ascent); | |
19937 | it->ascent = it->max_ascent; | |
19938 | } | |
19939 | it->phys_ascent = min (it->phys_ascent, it->ascent); | |
19940 | it->phys_descent = min (it->phys_descent, it->descent); | |
19941 | extra_line_spacing = 0; | |
19942 | } | |
e893970b | 19943 | |
133c764e KS |
19944 | /* If this is a space inside a region of text with |
19945 | `space-width' property, change its width. */ | |
19946 | stretched_p = it->char_to_display == ' ' && !NILP (it->space_width); | |
19947 | if (stretched_p) | |
19948 | it->pixel_width *= XFLOATINT (it->space_width); | |
19949 | ||
19950 | /* If face has a box, add the box thickness to the character | |
19951 | height. If character has a box line to the left and/or | |
19952 | right, add the box line width to the character's width. */ | |
19953 | if (face->box != FACE_NO_BOX) | |
19954 | { | |
19955 | int thick = face->box_line_width; | |
19956 | ||
19957 | if (thick > 0) | |
19958 | { | |
19959 | it->ascent += thick; | |
19960 | it->descent += thick; | |
19961 | } | |
19962 | else | |
19963 | thick = -thick; | |
19964 | ||
19965 | if (it->start_of_box_run_p) | |
19966 | it->pixel_width += thick; | |
19967 | if (it->end_of_box_run_p) | |
19968 | it->pixel_width += thick; | |
19969 | } | |
19970 | ||
19971 | /* If face has an overline, add the height of the overline | |
19972 | (1 pixel) and a 1 pixel margin to the character height. */ | |
19973 | if (face->overline_p) | |
19974 | it->ascent += 2; | |
19975 | ||
e893970b KS |
19976 | if (it->constrain_row_ascent_descent_p) |
19977 | { | |
19978 | if (it->ascent > it->max_ascent) | |
19979 | it->ascent = it->max_ascent; | |
19980 | if (it->descent > it->max_descent) | |
19981 | it->descent = it->max_descent; | |
19982 | } | |
19983 | ||
133c764e KS |
19984 | take_vertical_position_into_account (it); |
19985 | ||
19986 | /* If we have to actually produce glyphs, do it. */ | |
19987 | if (it->glyph_row) | |
19988 | { | |
19989 | if (stretched_p) | |
19990 | { | |
19991 | /* Translate a space with a `space-width' property | |
19992 | into a stretch glyph. */ | |
f65536fa KS |
19993 | int ascent = (((it->ascent + it->descent) * FONT_BASE (font)) |
19994 | / FONT_HEIGHT (font)); | |
133c764e KS |
19995 | append_stretch_glyph (it, it->object, it->pixel_width, |
19996 | it->ascent + it->descent, ascent); | |
19997 | } | |
19998 | else | |
19999 | append_glyph (it); | |
20000 | ||
20001 | /* If characters with lbearing or rbearing are displayed | |
20002 | in this line, record that fact in a flag of the | |
20003 | glyph row. This is used to optimize X output code. */ | |
20004 | if (pcm && (pcm->lbearing < 0 || pcm->rbearing > pcm->width)) | |
20005 | it->glyph_row->contains_overlapping_glyphs_p = 1; | |
20006 | } | |
20007 | } | |
20008 | else if (it->char_to_display == '\n') | |
20009 | { | |
e893970b KS |
20010 | /* A newline has no width but we need the height of the line. |
20011 | But if previous part of the line set a height, don't | |
20012 | increase that height */ | |
20013 | ||
17b01ffc | 20014 | Lisp_Object height; |
99c71e51 | 20015 | Lisp_Object total_height = Qnil; |
03e35edc | 20016 | |
a9e5c932 | 20017 | it->override_ascent = -1; |
133c764e KS |
20018 | it->pixel_width = 0; |
20019 | it->nglyphs = 0; | |
133c764e | 20020 | |
99c71e51 KS |
20021 | height = get_line_height_property(it, Qline_height); |
20022 | /* Split (line-height total-height) list */ | |
29aa4ce7 KS |
20023 | if (CONSP (height) |
20024 | && CONSP (XCDR (height)) | |
20025 | && NILP (XCDR (XCDR (height)))) | |
99c71e51 KS |
20026 | { |
20027 | total_height = XCAR (XCDR (height)); | |
20028 | height = XCAR (height); | |
20029 | } | |
20030 | height = calc_line_height_property(it, height, font, boff, 1); | |
4933c603 | 20031 | |
a9e5c932 | 20032 | if (it->override_ascent >= 0) |
4933c603 | 20033 | { |
a9e5c932 KS |
20034 | it->ascent = it->override_ascent; |
20035 | it->descent = it->override_descent; | |
20036 | boff = it->override_boff; | |
20037 | } | |
20038 | else | |
20039 | { | |
20040 | it->ascent = FONT_BASE (font) + boff; | |
20041 | it->descent = FONT_DESCENT (font) - boff; | |
4933c603 | 20042 | } |
03e35edc | 20043 | |
99c71e51 | 20044 | if (EQ (height, Qt)) |
e893970b | 20045 | { |
03e35edc KS |
20046 | if (it->descent > it->max_descent) |
20047 | { | |
20048 | it->ascent += it->descent - it->max_descent; | |
20049 | it->descent = it->max_descent; | |
20050 | } | |
4933c603 | 20051 | if (it->ascent > it->max_ascent) |
03e35edc KS |
20052 | { |
20053 | it->descent = min (it->max_descent, it->descent + it->ascent - it->max_ascent); | |
20054 | it->ascent = it->max_ascent; | |
20055 | } | |
20056 | it->phys_ascent = min (it->phys_ascent, it->ascent); | |
20057 | it->phys_descent = min (it->phys_descent, it->descent); | |
4933c603 | 20058 | it->constrain_row_ascent_descent_p = 1; |
03e35edc | 20059 | extra_line_spacing = 0; |
e893970b KS |
20060 | } |
20061 | else | |
20062 | { | |
17b01ffc | 20063 | Lisp_Object spacing; |
17b01ffc | 20064 | |
03e35edc KS |
20065 | it->phys_ascent = it->ascent; |
20066 | it->phys_descent = it->descent; | |
e893970b | 20067 | |
03e35edc KS |
20068 | if ((it->max_ascent > 0 || it->max_descent > 0) |
20069 | && face->box != FACE_NO_BOX | |
20070 | && face->box_line_width > 0) | |
20071 | { | |
20072 | it->ascent += face->box_line_width; | |
20073 | it->descent += face->box_line_width; | |
20074 | } | |
a9e5c932 KS |
20075 | if (!NILP (height) |
20076 | && XINT (height) > it->ascent + it->descent) | |
20077 | it->ascent = XINT (height) - it->descent; | |
4933c603 | 20078 | |
99c71e51 KS |
20079 | if (!NILP (total_height)) |
20080 | spacing = calc_line_height_property(it, total_height, font, boff, 0); | |
20081 | else | |
20082 | { | |
20083 | spacing = get_line_height_property(it, Qline_spacing); | |
20084 | spacing = calc_line_height_property(it, spacing, font, boff, 0); | |
20085 | } | |
17b01ffc KS |
20086 | if (INTEGERP (spacing)) |
20087 | { | |
20088 | extra_line_spacing = XINT (spacing); | |
99c71e51 | 20089 | if (!NILP (total_height)) |
17b01ffc KS |
20090 | extra_line_spacing -= (it->phys_ascent + it->phys_descent); |
20091 | } | |
a9e5c932 | 20092 | } |
133c764e KS |
20093 | } |
20094 | else if (it->char_to_display == '\t') | |
20095 | { | |
7335e61a | 20096 | int tab_width = it->tab_width * FRAME_SPACE_WIDTH (it->f); |
133c764e KS |
20097 | int x = it->current_x + it->continuation_lines_width; |
20098 | int next_tab_x = ((1 + x + tab_width - 1) / tab_width) * tab_width; | |
20099 | ||
20100 | /* If the distance from the current position to the next tab | |
7335e61a | 20101 | stop is less than a space character width, use the |
133c764e | 20102 | tab stop after that. */ |
7335e61a | 20103 | if (next_tab_x - x < FRAME_SPACE_WIDTH (it->f)) |
133c764e KS |
20104 | next_tab_x += tab_width; |
20105 | ||
20106 | it->pixel_width = next_tab_x - x; | |
20107 | it->nglyphs = 1; | |
20108 | it->ascent = it->phys_ascent = FONT_BASE (font) + boff; | |
20109 | it->descent = it->phys_descent = FONT_DESCENT (font) - boff; | |
20110 | ||
20111 | if (it->glyph_row) | |
20112 | { | |
133c764e | 20113 | append_stretch_glyph (it, it->object, it->pixel_width, |
f65536fa | 20114 | it->ascent + it->descent, it->ascent); |
133c764e KS |
20115 | } |
20116 | } | |
20117 | else | |
20118 | { | |
20119 | /* A multi-byte character. Assume that the display width of the | |
20120 | character is the width of the character multiplied by the | |
20121 | width of the font. */ | |
20122 | ||
20123 | /* If we found a font, this font should give us the right | |
20124 | metrics. If we didn't find a font, use the frame's | |
20125 | default font and calculate the width of the character | |
20126 | from the charset width; this is what old redisplay code | |
20127 | did. */ | |
20128 | ||
20129 | pcm = rif->per_char_metric (font, &char2b, | |
20130 | FONT_TYPE_FOR_MULTIBYTE (font, it->c)); | |
20131 | ||
20132 | if (font_not_found_p || !pcm) | |
20133 | { | |
20134 | int charset = CHAR_CHARSET (it->char_to_display); | |
20135 | ||
20136 | it->glyph_not_available_p = 1; | |
da8b7f4f | 20137 | it->pixel_width = (FRAME_COLUMN_WIDTH (it->f) |
133c764e KS |
20138 | * CHARSET_WIDTH (charset)); |
20139 | it->phys_ascent = FONT_BASE (font) + boff; | |
20140 | it->phys_descent = FONT_DESCENT (font) - boff; | |
20141 | } | |
20142 | else | |
20143 | { | |
20144 | it->pixel_width = pcm->width; | |
20145 | it->phys_ascent = pcm->ascent + boff; | |
20146 | it->phys_descent = pcm->descent - boff; | |
20147 | if (it->glyph_row | |
20148 | && (pcm->lbearing < 0 | |
20149 | || pcm->rbearing > pcm->width)) | |
20150 | it->glyph_row->contains_overlapping_glyphs_p = 1; | |
20151 | } | |
20152 | it->nglyphs = 1; | |
20153 | it->ascent = FONT_BASE (font) + boff; | |
20154 | it->descent = FONT_DESCENT (font) - boff; | |
20155 | if (face->box != FACE_NO_BOX) | |
20156 | { | |
20157 | int thick = face->box_line_width; | |
20158 | ||
20159 | if (thick > 0) | |
20160 | { | |
20161 | it->ascent += thick; | |
20162 | it->descent += thick; | |
20163 | } | |
20164 | else | |
20165 | thick = - thick; | |
20166 | ||
20167 | if (it->start_of_box_run_p) | |
20168 | it->pixel_width += thick; | |
20169 | if (it->end_of_box_run_p) | |
20170 | it->pixel_width += thick; | |
20171 | } | |
20172 | ||
20173 | /* If face has an overline, add the height of the overline | |
20174 | (1 pixel) and a 1 pixel margin to the character height. */ | |
20175 | if (face->overline_p) | |
20176 | it->ascent += 2; | |
20177 | ||
20178 | take_vertical_position_into_account (it); | |
20179 | ||
20180 | if (it->glyph_row) | |
20181 | append_glyph (it); | |
20182 | } | |
20183 | it->multibyte_p = saved_multibyte_p; | |
20184 | } | |
20185 | else if (it->what == IT_COMPOSITION) | |
20186 | { | |
20187 | /* Note: A composition is represented as one glyph in the | |
20188 | glyph matrix. There are no padding glyphs. */ | |
20189 | XChar2b char2b; | |
20190 | XFontStruct *font; | |
20191 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
20192 | XCharStruct *pcm; | |
20193 | int font_not_found_p; | |
20194 | struct font_info *font_info; | |
20195 | int boff; /* baseline offset */ | |
20196 | struct composition *cmp = composition_table[it->cmp_id]; | |
20197 | ||
20198 | /* Maybe translate single-byte characters to multibyte. */ | |
20199 | it->char_to_display = it->c; | |
20200 | if (unibyte_display_via_language_environment | |
20201 | && SINGLE_BYTE_CHAR_P (it->c) | |
20202 | && (it->c >= 0240 | |
20203 | || (it->c >= 0200 | |
20204 | && !NILP (Vnonascii_translation_table)))) | |
20205 | { | |
20206 | it->char_to_display = unibyte_char_to_multibyte (it->c); | |
20207 | } | |
20208 | ||
20209 | /* Get face and font to use. Encode IT->char_to_display. */ | |
20210 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
20211 | face = FACE_FROM_ID (it->f, it->face_id); | |
20212 | get_char_face_and_encoding (it->f, it->char_to_display, it->face_id, | |
20213 | &char2b, it->multibyte_p, 0); | |
20214 | font = face->font; | |
20215 | ||
20216 | /* When no suitable font found, use the default font. */ | |
20217 | font_not_found_p = font == NULL; | |
20218 | if (font_not_found_p) | |
20219 | { | |
20220 | font = FRAME_FONT (it->f); | |
20221 | boff = FRAME_BASELINE_OFFSET (it->f); | |
20222 | font_info = NULL; | |
20223 | } | |
20224 | else | |
20225 | { | |
20226 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
20227 | boff = font_info->baseline_offset; | |
20228 | if (font_info->vertical_centering) | |
20229 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
20230 | } | |
20231 | ||
20232 | /* There are no padding glyphs, so there is only one glyph to | |
20233 | produce for the composition. Important is that pixel_width, | |
20234 | ascent and descent are the values of what is drawn by | |
20235 | draw_glyphs (i.e. the values of the overall glyphs composed). */ | |
20236 | it->nglyphs = 1; | |
20237 | ||
20238 | /* If we have not yet calculated pixel size data of glyphs of | |
20239 | the composition for the current face font, calculate them | |
20240 | now. Theoretically, we have to check all fonts for the | |
20241 | glyphs, but that requires much time and memory space. So, | |
20242 | here we check only the font of the first glyph. This leads | |
20243 | to incorrect display very rarely, and C-l (recenter) can | |
20244 | correct the display anyway. */ | |
20245 | if (cmp->font != (void *) font) | |
20246 | { | |
20247 | /* Ascent and descent of the font of the first character of | |
20248 | this composition (adjusted by baseline offset). Ascent | |
20249 | and descent of overall glyphs should not be less than | |
20250 | them respectively. */ | |
20251 | int font_ascent = FONT_BASE (font) + boff; | |
20252 | int font_descent = FONT_DESCENT (font) - boff; | |
20253 | /* Bounding box of the overall glyphs. */ | |
20254 | int leftmost, rightmost, lowest, highest; | |
20255 | int i, width, ascent, descent; | |
20256 | ||
20257 | cmp->font = (void *) font; | |
20258 | ||
20259 | /* Initialize the bounding box. */ | |
20260 | if (font_info | |
20261 | && (pcm = rif->per_char_metric (font, &char2b, | |
20262 | FONT_TYPE_FOR_MULTIBYTE (font, it->c)))) | |
20263 | { | |
20264 | width = pcm->width; | |
20265 | ascent = pcm->ascent; | |
20266 | descent = pcm->descent; | |
20267 | } | |
20268 | else | |
20269 | { | |
20270 | width = FONT_WIDTH (font); | |
20271 | ascent = FONT_BASE (font); | |
20272 | descent = FONT_DESCENT (font); | |
20273 | } | |
20274 | ||
20275 | rightmost = width; | |
20276 | lowest = - descent + boff; | |
20277 | highest = ascent + boff; | |
20278 | leftmost = 0; | |
20279 | ||
20280 | if (font_info | |
20281 | && font_info->default_ascent | |
20282 | && CHAR_TABLE_P (Vuse_default_ascent) | |
20283 | && !NILP (Faref (Vuse_default_ascent, | |
20284 | make_number (it->char_to_display)))) | |
20285 | highest = font_info->default_ascent + boff; | |
20286 | ||
20287 | /* Draw the first glyph at the normal position. It may be | |
20288 | shifted to right later if some other glyphs are drawn at | |
20289 | the left. */ | |
20290 | cmp->offsets[0] = 0; | |
20291 | cmp->offsets[1] = boff; | |
20292 | ||
20293 | /* Set cmp->offsets for the remaining glyphs. */ | |
20294 | for (i = 1; i < cmp->glyph_len; i++) | |
20295 | { | |
20296 | int left, right, btm, top; | |
20297 | int ch = COMPOSITION_GLYPH (cmp, i); | |
20298 | int face_id = FACE_FOR_CHAR (it->f, face, ch); | |
20299 | ||
20300 | face = FACE_FROM_ID (it->f, face_id); | |
20301 | get_char_face_and_encoding (it->f, ch, face->id, | |
20302 | &char2b, it->multibyte_p, 0); | |
20303 | font = face->font; | |
20304 | if (font == NULL) | |
20305 | { | |
20306 | font = FRAME_FONT (it->f); | |
2a6d0874 | 20307 | boff = FRAME_BASELINE_OFFSET (it->f); |
133c764e KS |
20308 | font_info = NULL; |
20309 | } | |
20310 | else | |
20311 | { | |
20312 | font_info | |
20313 | = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
20314 | boff = font_info->baseline_offset; | |
20315 | if (font_info->vertical_centering) | |
20316 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
20317 | } | |
20318 | ||
20319 | if (font_info | |
2a6d0874 | 20320 | && (pcm = rif->per_char_metric (font, &char2b, |
133c764e KS |
20321 | FONT_TYPE_FOR_MULTIBYTE (font, ch)))) |
20322 | { | |
20323 | width = pcm->width; | |
20324 | ascent = pcm->ascent; | |
20325 | descent = pcm->descent; | |
20326 | } | |
20327 | else | |
20328 | { | |
20329 | width = FONT_WIDTH (font); | |
20330 | ascent = 1; | |
20331 | descent = 0; | |
20332 | } | |
20333 | ||
20334 | if (cmp->method != COMPOSITION_WITH_RULE_ALTCHARS) | |
20335 | { | |
20336 | /* Relative composition with or without | |
20337 | alternate chars. */ | |
20338 | left = (leftmost + rightmost - width) / 2; | |
20339 | btm = - descent + boff; | |
20340 | if (font_info && font_info->relative_compose | |
20341 | && (! CHAR_TABLE_P (Vignore_relative_composition) | |
20342 | || NILP (Faref (Vignore_relative_composition, | |
20343 | make_number (ch))))) | |
20344 | { | |
20345 | ||
20346 | if (- descent >= font_info->relative_compose) | |
20347 | /* One extra pixel between two glyphs. */ | |
20348 | btm = highest + 1; | |
20349 | else if (ascent <= 0) | |
20350 | /* One extra pixel between two glyphs. */ | |
20351 | btm = lowest - 1 - ascent - descent; | |
20352 | } | |
20353 | } | |
20354 | else | |
20355 | { | |
20356 | /* A composition rule is specified by an integer | |
20357 | value that encodes global and new reference | |
20358 | points (GREF and NREF). GREF and NREF are | |
20359 | specified by numbers as below: | |
20360 | ||
20361 | 0---1---2 -- ascent | |
20362 | | | | |
20363 | | | | |
20364 | | | | |
20365 | 9--10--11 -- center | |
20366 | | | | |
20367 | ---3---4---5--- baseline | |
20368 | | | | |
20369 | 6---7---8 -- descent | |
20370 | */ | |
20371 | int rule = COMPOSITION_RULE (cmp, i); | |
20372 | int gref, nref, grefx, grefy, nrefx, nrefy; | |
20373 | ||
20374 | COMPOSITION_DECODE_RULE (rule, gref, nref); | |
20375 | grefx = gref % 3, nrefx = nref % 3; | |
20376 | grefy = gref / 3, nrefy = nref / 3; | |
20377 | ||
20378 | left = (leftmost | |
20379 | + grefx * (rightmost - leftmost) / 2 | |
20380 | - nrefx * width / 2); | |
20381 | btm = ((grefy == 0 ? highest | |
20382 | : grefy == 1 ? 0 | |
20383 | : grefy == 2 ? lowest | |
20384 | : (highest + lowest) / 2) | |
20385 | - (nrefy == 0 ? ascent + descent | |
20386 | : nrefy == 1 ? descent - boff | |
20387 | : nrefy == 2 ? 0 | |
20388 | : (ascent + descent) / 2)); | |
20389 | } | |
20390 | ||
20391 | cmp->offsets[i * 2] = left; | |
20392 | cmp->offsets[i * 2 + 1] = btm + descent; | |
20393 | ||
20394 | /* Update the bounding box of the overall glyphs. */ | |
20395 | right = left + width; | |
20396 | top = btm + descent + ascent; | |
20397 | if (left < leftmost) | |
20398 | leftmost = left; | |
20399 | if (right > rightmost) | |
20400 | rightmost = right; | |
20401 | if (top > highest) | |
20402 | highest = top; | |
20403 | if (btm < lowest) | |
20404 | lowest = btm; | |
20405 | } | |
20406 | ||
20407 | /* If there are glyphs whose x-offsets are negative, | |
20408 | shift all glyphs to the right and make all x-offsets | |
20409 | non-negative. */ | |
20410 | if (leftmost < 0) | |
20411 | { | |
20412 | for (i = 0; i < cmp->glyph_len; i++) | |
20413 | cmp->offsets[i * 2] -= leftmost; | |
20414 | rightmost -= leftmost; | |
20415 | } | |
20416 | ||
20417 | cmp->pixel_width = rightmost; | |
20418 | cmp->ascent = highest; | |
20419 | cmp->descent = - lowest; | |
20420 | if (cmp->ascent < font_ascent) | |
20421 | cmp->ascent = font_ascent; | |
20422 | if (cmp->descent < font_descent) | |
20423 | cmp->descent = font_descent; | |
20424 | } | |
20425 | ||
20426 | it->pixel_width = cmp->pixel_width; | |
20427 | it->ascent = it->phys_ascent = cmp->ascent; | |
20428 | it->descent = it->phys_descent = cmp->descent; | |
20429 | ||
20430 | if (face->box != FACE_NO_BOX) | |
20431 | { | |
20432 | int thick = face->box_line_width; | |
20433 | ||
20434 | if (thick > 0) | |
20435 | { | |
20436 | it->ascent += thick; | |
20437 | it->descent += thick; | |
20438 | } | |
20439 | else | |
20440 | thick = - thick; | |
20441 | ||
20442 | if (it->start_of_box_run_p) | |
20443 | it->pixel_width += thick; | |
20444 | if (it->end_of_box_run_p) | |
20445 | it->pixel_width += thick; | |
20446 | } | |
20447 | ||
20448 | /* If face has an overline, add the height of the overline | |
20449 | (1 pixel) and a 1 pixel margin to the character height. */ | |
20450 | if (face->overline_p) | |
20451 | it->ascent += 2; | |
20452 | ||
20453 | take_vertical_position_into_account (it); | |
20454 | ||
20455 | if (it->glyph_row) | |
20456 | append_composite_glyph (it); | |
20457 | } | |
20458 | else if (it->what == IT_IMAGE) | |
20459 | produce_image_glyph (it); | |
20460 | else if (it->what == IT_STRETCH) | |
20461 | produce_stretch_glyph (it); | |
20462 | ||
20463 | /* Accumulate dimensions. Note: can't assume that it->descent > 0 | |
20464 | because this isn't true for images with `:ascent 100'. */ | |
20465 | xassert (it->ascent >= 0 && it->descent >= 0); | |
20466 | if (it->area == TEXT_AREA) | |
20467 | it->current_x += it->pixel_width; | |
20468 | ||
a9e5c932 | 20469 | if (extra_line_spacing > 0) |
546f98b8 KS |
20470 | { |
20471 | it->descent += extra_line_spacing; | |
20472 | if (extra_line_spacing > it->max_extra_line_spacing) | |
20473 | it->max_extra_line_spacing = extra_line_spacing; | |
20474 | } | |
133c764e KS |
20475 | |
20476 | it->max_ascent = max (it->max_ascent, it->ascent); | |
20477 | it->max_descent = max (it->max_descent, it->descent); | |
20478 | it->max_phys_ascent = max (it->max_phys_ascent, it->phys_ascent); | |
20479 | it->max_phys_descent = max (it->max_phys_descent, it->phys_descent); | |
20480 | } | |
20481 | ||
fa3c6b4d KS |
20482 | /* EXPORT for RIF: |
20483 | Output LEN glyphs starting at START at the nominal cursor position. | |
20484 | Advance the nominal cursor over the text. The global variable | |
20485 | updated_window contains the window being updated, updated_row is | |
20486 | the glyph row being updated, and updated_area is the area of that | |
20487 | row being updated. */ | |
133c764e | 20488 | |
fa3c6b4d KS |
20489 | void |
20490 | x_write_glyphs (start, len) | |
20491 | struct glyph *start; | |
20492 | int len; | |
20493 | { | |
20494 | int x, hpos; | |
133c764e | 20495 | |
fa3c6b4d KS |
20496 | xassert (updated_window && updated_row); |
20497 | BLOCK_INPUT; | |
133c764e | 20498 | |
fa3c6b4d | 20499 | /* Write glyphs. */ |
cfe03a41 | 20500 | |
fa3c6b4d KS |
20501 | hpos = start - updated_row->glyphs[updated_area]; |
20502 | x = draw_glyphs (updated_window, output_cursor.x, | |
20503 | updated_row, updated_area, | |
20504 | hpos, hpos + len, | |
20505 | DRAW_NORMAL_TEXT, 0); | |
cfe03a41 | 20506 | |
fa3c6b4d KS |
20507 | /* Invalidate old phys cursor if the glyph at its hpos is redrawn. */ |
20508 | if (updated_area == TEXT_AREA | |
20509 | && updated_window->phys_cursor_on_p | |
20510 | && updated_window->phys_cursor.vpos == output_cursor.vpos | |
20511 | && updated_window->phys_cursor.hpos >= hpos | |
20512 | && updated_window->phys_cursor.hpos < hpos + len) | |
20513 | updated_window->phys_cursor_on_p = 0; | |
cfe03a41 | 20514 | |
fa3c6b4d | 20515 | UNBLOCK_INPUT; |
cfe03a41 | 20516 | |
fa3c6b4d KS |
20517 | /* Advance the output cursor. */ |
20518 | output_cursor.hpos += len; | |
20519 | output_cursor.x = x; | |
20520 | } | |
cfe03a41 | 20521 | |
cfe03a41 | 20522 | |
fa3c6b4d KS |
20523 | /* EXPORT for RIF: |
20524 | Insert LEN glyphs from START at the nominal cursor position. */ | |
20525 | ||
20526 | void | |
20527 | x_insert_glyphs (start, len) | |
20528 | struct glyph *start; | |
20529 | int len; | |
20530 | { | |
20531 | struct frame *f; | |
20532 | struct window *w; | |
20533 | int line_height, shift_by_width, shifted_region_width; | |
20534 | struct glyph_row *row; | |
20535 | struct glyph *glyph; | |
20536 | int frame_x, frame_y, hpos; | |
20537 | ||
20538 | xassert (updated_window && updated_row); | |
20539 | BLOCK_INPUT; | |
20540 | w = updated_window; | |
20541 | f = XFRAME (WINDOW_FRAME (w)); | |
20542 | ||
20543 | /* Get the height of the line we are in. */ | |
20544 | row = updated_row; | |
20545 | line_height = row->height; | |
20546 | ||
20547 | /* Get the width of the glyphs to insert. */ | |
20548 | shift_by_width = 0; | |
20549 | for (glyph = start; glyph < start + len; ++glyph) | |
20550 | shift_by_width += glyph->pixel_width; | |
20551 | ||
20552 | /* Get the width of the region to shift right. */ | |
20553 | shifted_region_width = (window_box_width (w, updated_area) | |
20554 | - output_cursor.x | |
20555 | - shift_by_width); | |
20556 | ||
20557 | /* Shift right. */ | |
20558 | frame_x = window_box_left (w, updated_area) + output_cursor.x; | |
20559 | frame_y = WINDOW_TO_FRAME_PIXEL_Y (w, output_cursor.y); | |
20560 | ||
7b7b454e AS |
20561 | rif->shift_glyphs_for_insert (f, frame_x, frame_y, shifted_region_width, |
20562 | line_height, shift_by_width); | |
fa3c6b4d KS |
20563 | |
20564 | /* Write the glyphs. */ | |
20565 | hpos = start - row->glyphs[updated_area]; | |
20566 | draw_glyphs (w, output_cursor.x, row, updated_area, | |
20567 | hpos, hpos + len, | |
20568 | DRAW_NORMAL_TEXT, 0); | |
20569 | ||
20570 | /* Advance the output cursor. */ | |
20571 | output_cursor.hpos += len; | |
20572 | output_cursor.x += shift_by_width; | |
20573 | UNBLOCK_INPUT; | |
20574 | } | |
20575 | ||
20576 | ||
20577 | /* EXPORT for RIF: | |
20578 | Erase the current text line from the nominal cursor position | |
20579 | (inclusive) to pixel column TO_X (exclusive). The idea is that | |
20580 | everything from TO_X onward is already erased. | |
20581 | ||
20582 | TO_X is a pixel position relative to updated_area of | |
20583 | updated_window. TO_X == -1 means clear to the end of this area. */ | |
20584 | ||
20585 | void | |
20586 | x_clear_end_of_line (to_x) | |
20587 | int to_x; | |
20588 | { | |
20589 | struct frame *f; | |
20590 | struct window *w = updated_window; | |
20591 | int max_x, min_y, max_y; | |
20592 | int from_x, from_y, to_y; | |
20593 | ||
20594 | xassert (updated_window && updated_row); | |
20595 | f = XFRAME (w->frame); | |
20596 | ||
20597 | if (updated_row->full_width_p) | |
da8b7f4f | 20598 | max_x = WINDOW_TOTAL_WIDTH (w); |
fa3c6b4d KS |
20599 | else |
20600 | max_x = window_box_width (w, updated_area); | |
20601 | max_y = window_text_bottom_y (w); | |
20602 | ||
20603 | /* TO_X == 0 means don't do anything. TO_X < 0 means clear to end | |
20604 | of window. For TO_X > 0, truncate to end of drawing area. */ | |
20605 | if (to_x == 0) | |
20606 | return; | |
20607 | else if (to_x < 0) | |
20608 | to_x = max_x; | |
20609 | else | |
20610 | to_x = min (to_x, max_x); | |
20611 | ||
20612 | to_y = min (max_y, output_cursor.y + updated_row->height); | |
20613 | ||
20614 | /* Notice if the cursor will be cleared by this operation. */ | |
20615 | if (!updated_row->full_width_p) | |
20616 | notice_overwritten_cursor (w, updated_area, | |
20617 | output_cursor.x, -1, | |
20618 | updated_row->y, | |
20619 | MATRIX_ROW_BOTTOM_Y (updated_row)); | |
20620 | ||
20621 | from_x = output_cursor.x; | |
20622 | ||
20623 | /* Translate to frame coordinates. */ | |
20624 | if (updated_row->full_width_p) | |
20625 | { | |
20626 | from_x = WINDOW_TO_FRAME_PIXEL_X (w, from_x); | |
20627 | to_x = WINDOW_TO_FRAME_PIXEL_X (w, to_x); | |
20628 | } | |
20629 | else | |
20630 | { | |
da8b7f4f KS |
20631 | int area_left = window_box_left (w, updated_area); |
20632 | from_x += area_left; | |
20633 | to_x += area_left; | |
fa3c6b4d KS |
20634 | } |
20635 | ||
da8b7f4f | 20636 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
fa3c6b4d KS |
20637 | from_y = WINDOW_TO_FRAME_PIXEL_Y (w, max (min_y, output_cursor.y)); |
20638 | to_y = WINDOW_TO_FRAME_PIXEL_Y (w, to_y); | |
20639 | ||
20640 | /* Prevent inadvertently clearing to end of the X window. */ | |
20641 | if (to_x > from_x && to_y > from_y) | |
20642 | { | |
20643 | BLOCK_INPUT; | |
20644 | rif->clear_frame_area (f, from_x, from_y, | |
20645 | to_x - from_x, to_y - from_y); | |
20646 | UNBLOCK_INPUT; | |
20647 | } | |
20648 | } | |
20649 | ||
20650 | #endif /* HAVE_WINDOW_SYSTEM */ | |
20651 | ||
20652 | ||
20653 | \f | |
20654 | /*********************************************************************** | |
20655 | Cursor types | |
20656 | ***********************************************************************/ | |
20657 | ||
20658 | /* Value is the internal representation of the specified cursor type | |
20659 | ARG. If type is BAR_CURSOR, return in *WIDTH the specified width | |
20660 | of the bar cursor. */ | |
20661 | ||
f65536fa | 20662 | static enum text_cursor_kinds |
fa3c6b4d KS |
20663 | get_specified_cursor_type (arg, width) |
20664 | Lisp_Object arg; | |
20665 | int *width; | |
20666 | { | |
20667 | enum text_cursor_kinds type; | |
20668 | ||
20669 | if (NILP (arg)) | |
20670 | return NO_CURSOR; | |
20671 | ||
20672 | if (EQ (arg, Qbox)) | |
20673 | return FILLED_BOX_CURSOR; | |
20674 | ||
20675 | if (EQ (arg, Qhollow)) | |
20676 | return HOLLOW_BOX_CURSOR; | |
20677 | ||
20678 | if (EQ (arg, Qbar)) | |
20679 | { | |
20680 | *width = 2; | |
20681 | return BAR_CURSOR; | |
20682 | } | |
20683 | ||
20684 | if (CONSP (arg) | |
20685 | && EQ (XCAR (arg), Qbar) | |
20686 | && INTEGERP (XCDR (arg)) | |
20687 | && XINT (XCDR (arg)) >= 0) | |
20688 | { | |
20689 | *width = XINT (XCDR (arg)); | |
20690 | return BAR_CURSOR; | |
20691 | } | |
20692 | ||
20693 | if (EQ (arg, Qhbar)) | |
20694 | { | |
20695 | *width = 2; | |
20696 | return HBAR_CURSOR; | |
20697 | } | |
20698 | ||
20699 | if (CONSP (arg) | |
20700 | && EQ (XCAR (arg), Qhbar) | |
20701 | && INTEGERP (XCDR (arg)) | |
20702 | && XINT (XCDR (arg)) >= 0) | |
20703 | { | |
20704 | *width = XINT (XCDR (arg)); | |
20705 | return HBAR_CURSOR; | |
20706 | } | |
20707 | ||
20708 | /* Treat anything unknown as "hollow box cursor". | |
20709 | It was bad to signal an error; people have trouble fixing | |
20710 | .Xdefaults with Emacs, when it has something bad in it. */ | |
20711 | type = HOLLOW_BOX_CURSOR; | |
20712 | ||
20713 | return type; | |
20714 | } | |
20715 | ||
20716 | /* Set the default cursor types for specified frame. */ | |
20717 | void | |
20718 | set_frame_cursor_types (f, arg) | |
20719 | struct frame *f; | |
20720 | Lisp_Object arg; | |
20721 | { | |
20722 | int width; | |
20723 | Lisp_Object tem; | |
20724 | ||
20725 | FRAME_DESIRED_CURSOR (f) = get_specified_cursor_type (arg, &width); | |
20726 | FRAME_CURSOR_WIDTH (f) = width; | |
20727 | ||
20728 | /* By default, set up the blink-off state depending on the on-state. */ | |
20729 | ||
20730 | tem = Fassoc (arg, Vblink_cursor_alist); | |
20731 | if (!NILP (tem)) | |
20732 | { | |
20733 | FRAME_BLINK_OFF_CURSOR (f) | |
20734 | = get_specified_cursor_type (XCDR (tem), &width); | |
20735 | FRAME_BLINK_OFF_CURSOR_WIDTH (f) = width; | |
20736 | } | |
20737 | else | |
20738 | FRAME_BLINK_OFF_CURSOR (f) = DEFAULT_CURSOR; | |
20739 | } | |
20740 | ||
20741 | ||
20742 | /* Return the cursor we want to be displayed in window W. Return | |
20743 | width of bar/hbar cursor through WIDTH arg. Return with | |
20744 | ACTIVE_CURSOR arg set to 1 if cursor in window W is `active' | |
20745 | (i.e. if the `system caret' should track this cursor). | |
20746 | ||
20747 | In a mini-buffer window, we want the cursor only to appear if we | |
20748 | are reading input from this window. For the selected window, we | |
20749 | want the cursor type given by the frame parameter or buffer local | |
20750 | setting of cursor-type. If explicitly marked off, draw no cursor. | |
20751 | In all other cases, we want a hollow box cursor. */ | |
20752 | ||
f65536fa KS |
20753 | static enum text_cursor_kinds |
20754 | get_window_cursor_type (w, glyph, width, active_cursor) | |
fa3c6b4d | 20755 | struct window *w; |
f65536fa | 20756 | struct glyph *glyph; |
fa3c6b4d KS |
20757 | int *width; |
20758 | int *active_cursor; | |
20759 | { | |
20760 | struct frame *f = XFRAME (w->frame); | |
20761 | struct buffer *b = XBUFFER (w->buffer); | |
20762 | int cursor_type = DEFAULT_CURSOR; | |
20763 | Lisp_Object alt_cursor; | |
20764 | int non_selected = 0; | |
20765 | ||
20766 | *active_cursor = 1; | |
20767 | ||
20768 | /* Echo area */ | |
20769 | if (cursor_in_echo_area | |
20770 | && FRAME_HAS_MINIBUF_P (f) | |
20771 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
20772 | { | |
20773 | if (w == XWINDOW (echo_area_window)) | |
20774 | { | |
20775 | *width = FRAME_CURSOR_WIDTH (f); | |
20776 | return FRAME_DESIRED_CURSOR (f); | |
20777 | } | |
20778 | ||
20779 | *active_cursor = 0; | |
20780 | non_selected = 1; | |
20781 | } | |
20782 | ||
20783 | /* Nonselected window or nonselected frame. */ | |
20784 | else if (w != XWINDOW (f->selected_window) | |
20785 | #ifdef HAVE_WINDOW_SYSTEM | |
20786 | || f != FRAME_X_DISPLAY_INFO (f)->x_highlight_frame | |
20787 | #endif | |
20788 | ) | |
20789 | { | |
20790 | *active_cursor = 0; | |
20791 | ||
20792 | if (MINI_WINDOW_P (w) && minibuf_level == 0) | |
20793 | return NO_CURSOR; | |
20794 | ||
20795 | non_selected = 1; | |
20796 | } | |
20797 | ||
20798 | /* Never display a cursor in a window in which cursor-type is nil. */ | |
20799 | if (NILP (b->cursor_type)) | |
20800 | return NO_CURSOR; | |
20801 | ||
20802 | /* Use cursor-in-non-selected-windows for non-selected window or frame. */ | |
20803 | if (non_selected) | |
20804 | { | |
a6cbd53f | 20805 | alt_cursor = b->cursor_in_non_selected_windows; |
fa3c6b4d KS |
20806 | return get_specified_cursor_type (alt_cursor, width); |
20807 | } | |
20808 | ||
20809 | /* Get the normal cursor type for this window. */ | |
20810 | if (EQ (b->cursor_type, Qt)) | |
20811 | { | |
20812 | cursor_type = FRAME_DESIRED_CURSOR (f); | |
20813 | *width = FRAME_CURSOR_WIDTH (f); | |
20814 | } | |
20815 | else | |
20816 | cursor_type = get_specified_cursor_type (b->cursor_type, width); | |
20817 | ||
20818 | /* Use normal cursor if not blinked off. */ | |
1d712183 | 20819 | if (!w->cursor_off_p) |
f65536fa | 20820 | { |
1d712183 | 20821 | if (glyph != NULL && glyph->type == IMAGE_GLYPH) { |
f65536fa KS |
20822 | if (cursor_type == FILLED_BOX_CURSOR) |
20823 | cursor_type = HOLLOW_BOX_CURSOR; | |
20824 | } | |
20825 | return cursor_type; | |
20826 | } | |
fa3c6b4d KS |
20827 | |
20828 | /* Cursor is blinked off, so determine how to "toggle" it. */ | |
20829 | ||
20830 | /* First look for an entry matching the buffer's cursor-type in blink-cursor-alist. */ | |
20831 | if ((alt_cursor = Fassoc (b->cursor_type, Vblink_cursor_alist), !NILP (alt_cursor))) | |
20832 | return get_specified_cursor_type (XCDR (alt_cursor), width); | |
20833 | ||
20834 | /* Then see if frame has specified a specific blink off cursor type. */ | |
20835 | if (FRAME_BLINK_OFF_CURSOR (f) != DEFAULT_CURSOR) | |
20836 | { | |
20837 | *width = FRAME_BLINK_OFF_CURSOR_WIDTH (f); | |
20838 | return FRAME_BLINK_OFF_CURSOR (f); | |
20839 | } | |
20840 | ||
a57dd8b1 KS |
20841 | #if 0 |
20842 | /* Some people liked having a permanently visible blinking cursor, | |
20843 | while others had very strong opinions against it. So it was | |
20844 | decided to remove it. KFS 2003-09-03 */ | |
20845 | ||
fa3c6b4d KS |
20846 | /* Finally perform built-in cursor blinking: |
20847 | filled box <-> hollow box | |
20848 | wide [h]bar <-> narrow [h]bar | |
20849 | narrow [h]bar <-> no cursor | |
20850 | other type <-> no cursor */ | |
20851 | ||
20852 | if (cursor_type == FILLED_BOX_CURSOR) | |
20853 | return HOLLOW_BOX_CURSOR; | |
20854 | ||
20855 | if ((cursor_type == BAR_CURSOR || cursor_type == HBAR_CURSOR) && *width > 1) | |
20856 | { | |
20857 | *width = 1; | |
20858 | return cursor_type; | |
20859 | } | |
a57dd8b1 | 20860 | #endif |
fa3c6b4d KS |
20861 | |
20862 | return NO_CURSOR; | |
20863 | } | |
20864 | ||
20865 | ||
20866 | #ifdef HAVE_WINDOW_SYSTEM | |
20867 | ||
20868 | /* Notice when the text cursor of window W has been completely | |
20869 | overwritten by a drawing operation that outputs glyphs in AREA | |
20870 | starting at X0 and ending at X1 in the line starting at Y0 and | |
20871 | ending at Y1. X coordinates are area-relative. X1 < 0 means all | |
20872 | the rest of the line after X0 has been written. Y coordinates | |
20873 | are window-relative. */ | |
20874 | ||
20875 | static void | |
20876 | notice_overwritten_cursor (w, area, x0, x1, y0, y1) | |
20877 | struct window *w; | |
20878 | enum glyph_row_area area; | |
20879 | int x0, y0, x1, y1; | |
20880 | { | |
88e6b646 KS |
20881 | int cx0, cx1, cy0, cy1; |
20882 | struct glyph_row *row; | |
fa3c6b4d | 20883 | |
88e6b646 KS |
20884 | if (!w->phys_cursor_on_p) |
20885 | return; | |
20886 | if (area != TEXT_AREA) | |
20887 | return; | |
fa3c6b4d | 20888 | |
2e87e8f2 KS |
20889 | if (w->phys_cursor.vpos < 0 |
20890 | || w->phys_cursor.vpos >= w->current_matrix->nrows | |
20891 | || (row = w->current_matrix->rows + w->phys_cursor.vpos, | |
20892 | !(row->enabled_p && row->displays_text_p))) | |
83daa9dc | 20893 | return; |
fa3c6b4d | 20894 | |
88e6b646 KS |
20895 | if (row->cursor_in_fringe_p) |
20896 | { | |
20897 | row->cursor_in_fringe_p = 0; | |
20898 | draw_fringe_bitmap (w, row, 0); | |
20899 | w->phys_cursor_on_p = 0; | |
20900 | return; | |
fa3c6b4d | 20901 | } |
88e6b646 KS |
20902 | |
20903 | cx0 = w->phys_cursor.x; | |
20904 | cx1 = cx0 + w->phys_cursor_width; | |
20905 | if (x0 > cx0 || (x1 >= 0 && x1 < cx1)) | |
20906 | return; | |
20907 | ||
20908 | /* The cursor image will be completely removed from the | |
20909 | screen if the output area intersects the cursor area in | |
20910 | y-direction. When we draw in [y0 y1[, and some part of | |
20911 | the cursor is at y < y0, that part must have been drawn | |
20912 | before. When scrolling, the cursor is erased before | |
20913 | actually scrolling, so we don't come here. When not | |
20914 | scrolling, the rows above the old cursor row must have | |
20915 | changed, and in this case these rows must have written | |
20916 | over the cursor image. | |
20917 | ||
20918 | Likewise if part of the cursor is below y1, with the | |
20919 | exception of the cursor being in the first blank row at | |
20920 | the buffer and window end because update_text_area | |
20921 | doesn't draw that row. (Except when it does, but | |
20922 | that's handled in update_text_area.) */ | |
20923 | ||
20924 | cy0 = w->phys_cursor.y; | |
20925 | cy1 = cy0 + w->phys_cursor_height; | |
20926 | if ((y0 < cy0 || y0 >= cy1) && (y1 <= cy0 || y1 >= cy1)) | |
20927 | return; | |
20928 | ||
20929 | w->phys_cursor_on_p = 0; | |
fa3c6b4d KS |
20930 | } |
20931 | ||
20932 | #endif /* HAVE_WINDOW_SYSTEM */ | |
20933 | ||
20934 | \f | |
20935 | /************************************************************************ | |
20936 | Mouse Face | |
20937 | ************************************************************************/ | |
20938 | ||
20939 | #ifdef HAVE_WINDOW_SYSTEM | |
20940 | ||
20941 | /* EXPORT for RIF: | |
a66678fd YM |
20942 | Fix the display of area AREA of overlapping row ROW in window W |
20943 | with respect to the overlapping part OVERLAPS. */ | |
fa3c6b4d KS |
20944 | |
20945 | void | |
a66678fd | 20946 | x_fix_overlapping_area (w, row, area, overlaps) |
fa3c6b4d KS |
20947 | struct window *w; |
20948 | struct glyph_row *row; | |
20949 | enum glyph_row_area area; | |
a66678fd | 20950 | int overlaps; |
fa3c6b4d KS |
20951 | { |
20952 | int i, x; | |
20953 | ||
20954 | BLOCK_INPUT; | |
20955 | ||
57dd22f4 | 20956 | x = 0; |
fa3c6b4d KS |
20957 | for (i = 0; i < row->used[area];) |
20958 | { | |
20959 | if (row->glyphs[area][i].overlaps_vertically_p) | |
20960 | { | |
20961 | int start = i, start_x = x; | |
20962 | ||
20963 | do | |
20964 | { | |
20965 | x += row->glyphs[area][i].pixel_width; | |
20966 | ++i; | |
20967 | } | |
20968 | while (i < row->used[area] | |
20969 | && row->glyphs[area][i].overlaps_vertically_p); | |
20970 | ||
20971 | draw_glyphs (w, start_x, row, area, | |
20972 | start, i, | |
a66678fd | 20973 | DRAW_NORMAL_TEXT, overlaps); |
fa3c6b4d KS |
20974 | } |
20975 | else | |
20976 | { | |
20977 | x += row->glyphs[area][i].pixel_width; | |
20978 | ++i; | |
20979 | } | |
20980 | } | |
20981 | ||
20982 | UNBLOCK_INPUT; | |
20983 | } | |
20984 | ||
20985 | ||
20986 | /* EXPORT: | |
20987 | Draw the cursor glyph of window W in glyph row ROW. See the | |
20988 | comment of draw_glyphs for the meaning of HL. */ | |
20989 | ||
20990 | void | |
20991 | draw_phys_cursor_glyph (w, row, hl) | |
20992 | struct window *w; | |
20993 | struct glyph_row *row; | |
20994 | enum draw_glyphs_face hl; | |
20995 | { | |
20996 | /* If cursor hpos is out of bounds, don't draw garbage. This can | |
20997 | happen in mini-buffer windows when switching between echo area | |
20998 | glyphs and mini-buffer. */ | |
20999 | if (w->phys_cursor.hpos < row->used[TEXT_AREA]) | |
21000 | { | |
21001 | int on_p = w->phys_cursor_on_p; | |
21002 | int x1; | |
21003 | x1 = draw_glyphs (w, w->phys_cursor.x, row, TEXT_AREA, | |
21004 | w->phys_cursor.hpos, w->phys_cursor.hpos + 1, | |
21005 | hl, 0); | |
21006 | w->phys_cursor_on_p = on_p; | |
21007 | ||
fa3c6b4d KS |
21008 | if (hl == DRAW_CURSOR) |
21009 | w->phys_cursor_width = x1 - w->phys_cursor.x; | |
fa3c6b4d KS |
21010 | /* When we erase the cursor, and ROW is overlapped by other |
21011 | rows, make sure that these overlapping parts of other rows | |
21012 | are redrawn. */ | |
365fa1b3 | 21013 | else if (hl == DRAW_NORMAL_TEXT && row->overlapped_p) |
fa3c6b4d | 21014 | { |
a66678fd YM |
21015 | w->phys_cursor_width = x1 - w->phys_cursor.x; |
21016 | ||
fa3c6b4d KS |
21017 | if (row > w->current_matrix->rows |
21018 | && MATRIX_ROW_OVERLAPS_SUCC_P (row - 1)) | |
a66678fd YM |
21019 | x_fix_overlapping_area (w, row - 1, TEXT_AREA, |
21020 | OVERLAPS_ERASED_CURSOR); | |
fa3c6b4d KS |
21021 | |
21022 | if (MATRIX_ROW_BOTTOM_Y (row) < window_text_bottom_y (w) | |
21023 | && MATRIX_ROW_OVERLAPS_PRED_P (row + 1)) | |
a66678fd YM |
21024 | x_fix_overlapping_area (w, row + 1, TEXT_AREA, |
21025 | OVERLAPS_ERASED_CURSOR); | |
fa3c6b4d KS |
21026 | } |
21027 | } | |
21028 | } | |
21029 | ||
21030 | ||
21031 | /* EXPORT: | |
21032 | Erase the image of a cursor of window W from the screen. */ | |
21033 | ||
21034 | void | |
21035 | erase_phys_cursor (w) | |
21036 | struct window *w; | |
21037 | { | |
21038 | struct frame *f = XFRAME (w->frame); | |
21039 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
21040 | int hpos = w->phys_cursor.hpos; | |
21041 | int vpos = w->phys_cursor.vpos; | |
21042 | int mouse_face_here_p = 0; | |
21043 | struct glyph_matrix *active_glyphs = w->current_matrix; | |
21044 | struct glyph_row *cursor_row; | |
21045 | struct glyph *cursor_glyph; | |
21046 | enum draw_glyphs_face hl; | |
21047 | ||
21048 | /* No cursor displayed or row invalidated => nothing to do on the | |
21049 | screen. */ | |
21050 | if (w->phys_cursor_type == NO_CURSOR) | |
21051 | goto mark_cursor_off; | |
21052 | ||
21053 | /* VPOS >= active_glyphs->nrows means that window has been resized. | |
21054 | Don't bother to erase the cursor. */ | |
21055 | if (vpos >= active_glyphs->nrows) | |
21056 | goto mark_cursor_off; | |
21057 | ||
21058 | /* If row containing cursor is marked invalid, there is nothing we | |
21059 | can do. */ | |
21060 | cursor_row = MATRIX_ROW (active_glyphs, vpos); | |
21061 | if (!cursor_row->enabled_p) | |
21062 | goto mark_cursor_off; | |
21063 | ||
78e7b91f KS |
21064 | /* If line spacing is > 0, old cursor may only be partially visible in |
21065 | window after split-window. So adjust visible height. */ | |
21066 | cursor_row->visible_height = min (cursor_row->visible_height, | |
21067 | window_text_bottom_y (w) - cursor_row->y); | |
21068 | ||
fa3c6b4d KS |
21069 | /* If row is completely invisible, don't attempt to delete a cursor which |
21070 | isn't there. This can happen if cursor is at top of a window, and | |
21071 | we switch to a buffer with a header line in that window. */ | |
21072 | if (cursor_row->visible_height <= 0) | |
21073 | goto mark_cursor_off; | |
21074 | ||
88e6b646 KS |
21075 | /* If cursor is in the fringe, erase by drawing actual bitmap there. */ |
21076 | if (cursor_row->cursor_in_fringe_p) | |
21077 | { | |
21078 | cursor_row->cursor_in_fringe_p = 0; | |
21079 | draw_fringe_bitmap (w, cursor_row, 0); | |
21080 | goto mark_cursor_off; | |
21081 | } | |
21082 | ||
fa3c6b4d KS |
21083 | /* This can happen when the new row is shorter than the old one. |
21084 | In this case, either draw_glyphs or clear_end_of_line | |
21085 | should have cleared the cursor. Note that we wouldn't be | |
21086 | able to erase the cursor in this case because we don't have a | |
21087 | cursor glyph at hand. */ | |
21088 | if (w->phys_cursor.hpos >= cursor_row->used[TEXT_AREA]) | |
21089 | goto mark_cursor_off; | |
21090 | ||
21091 | /* If the cursor is in the mouse face area, redisplay that when | |
21092 | we clear the cursor. */ | |
21093 | if (! NILP (dpyinfo->mouse_face_window) | |
21094 | && w == XWINDOW (dpyinfo->mouse_face_window) | |
21095 | && (vpos > dpyinfo->mouse_face_beg_row | |
21096 | || (vpos == dpyinfo->mouse_face_beg_row | |
21097 | && hpos >= dpyinfo->mouse_face_beg_col)) | |
21098 | && (vpos < dpyinfo->mouse_face_end_row | |
21099 | || (vpos == dpyinfo->mouse_face_end_row | |
21100 | && hpos < dpyinfo->mouse_face_end_col)) | |
21101 | /* Don't redraw the cursor's spot in mouse face if it is at the | |
21102 | end of a line (on a newline). The cursor appears there, but | |
21103 | mouse highlighting does not. */ | |
21104 | && cursor_row->used[TEXT_AREA] > hpos) | |
21105 | mouse_face_here_p = 1; | |
21106 | ||
21107 | /* Maybe clear the display under the cursor. */ | |
21108 | if (w->phys_cursor_type == HOLLOW_BOX_CURSOR) | |
21109 | { | |
21110 | int x, y; | |
da8b7f4f | 21111 | int header_line_height = WINDOW_HEADER_LINE_HEIGHT (w); |
e1dca367 | 21112 | int width; |
fa3c6b4d KS |
21113 | |
21114 | cursor_glyph = get_phys_cursor_glyph (w); | |
21115 | if (cursor_glyph == NULL) | |
21116 | goto mark_cursor_off; | |
21117 | ||
21118 | x = WINDOW_TEXT_TO_FRAME_PIXEL_X (w, w->phys_cursor.x); | |
21119 | y = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height, cursor_row->y)); | |
e1dca367 KS |
21120 | width = min (cursor_glyph->pixel_width, |
21121 | window_box_width (w, TEXT_AREA) - w->phys_cursor.x); | |
fa3c6b4d | 21122 | |
e1dca367 | 21123 | rif->clear_frame_area (f, x, y, width, cursor_row->visible_height); |
fa3c6b4d KS |
21124 | } |
21125 | ||
21126 | /* Erase the cursor by redrawing the character underneath it. */ | |
21127 | if (mouse_face_here_p) | |
21128 | hl = DRAW_MOUSE_FACE; | |
21129 | else | |
21130 | hl = DRAW_NORMAL_TEXT; | |
21131 | draw_phys_cursor_glyph (w, cursor_row, hl); | |
21132 | ||
21133 | mark_cursor_off: | |
21134 | w->phys_cursor_on_p = 0; | |
21135 | w->phys_cursor_type = NO_CURSOR; | |
21136 | } | |
21137 | ||
21138 | ||
21139 | /* EXPORT: | |
21140 | Display or clear cursor of window W. If ON is zero, clear the | |
21141 | cursor. If it is non-zero, display the cursor. If ON is nonzero, | |
21142 | where to put the cursor is specified by HPOS, VPOS, X and Y. */ | |
21143 | ||
21144 | void | |
21145 | display_and_set_cursor (w, on, hpos, vpos, x, y) | |
21146 | struct window *w; | |
21147 | int on, hpos, vpos, x, y; | |
21148 | { | |
21149 | struct frame *f = XFRAME (w->frame); | |
21150 | int new_cursor_type; | |
21151 | int new_cursor_width; | |
21152 | int active_cursor; | |
fa3c6b4d KS |
21153 | struct glyph_row *glyph_row; |
21154 | struct glyph *glyph; | |
21155 | ||
21156 | /* This is pointless on invisible frames, and dangerous on garbaged | |
21157 | windows and frames; in the latter case, the frame or window may | |
21158 | be in the midst of changing its size, and x and y may be off the | |
21159 | window. */ | |
21160 | if (! FRAME_VISIBLE_P (f) | |
21161 | || FRAME_GARBAGED_P (f) | |
21162 | || vpos >= w->current_matrix->nrows | |
21163 | || hpos >= w->current_matrix->matrix_w) | |
21164 | return; | |
21165 | ||
21166 | /* If cursor is off and we want it off, return quickly. */ | |
21167 | if (!on && !w->phys_cursor_on_p) | |
21168 | return; | |
21169 | ||
1d712183 | 21170 | glyph_row = MATRIX_ROW (w->current_matrix, vpos); |
fa3c6b4d KS |
21171 | /* If cursor row is not enabled, we don't really know where to |
21172 | display the cursor. */ | |
21173 | if (!glyph_row->enabled_p) | |
21174 | { | |
21175 | w->phys_cursor_on_p = 0; | |
21176 | return; | |
21177 | } | |
21178 | ||
1d712183 KS |
21179 | glyph = NULL; |
21180 | if (!glyph_row->exact_window_width_line_p | |
21181 | || hpos < glyph_row->used[TEXT_AREA]) | |
21182 | glyph = glyph_row->glyphs[TEXT_AREA] + hpos; | |
21183 | ||
fa3c6b4d KS |
21184 | xassert (interrupt_input_blocked); |
21185 | ||
21186 | /* Set new_cursor_type to the cursor we want to be displayed. */ | |
f65536fa KS |
21187 | new_cursor_type = get_window_cursor_type (w, glyph, |
21188 | &new_cursor_width, &active_cursor); | |
fa3c6b4d KS |
21189 | |
21190 | /* If cursor is currently being shown and we don't want it to be or | |
21191 | it is in the wrong place, or the cursor type is not what we want, | |
21192 | erase it. */ | |
21193 | if (w->phys_cursor_on_p | |
21194 | && (!on | |
21195 | || w->phys_cursor.x != x | |
21196 | || w->phys_cursor.y != y | |
21197 | || new_cursor_type != w->phys_cursor_type | |
21198 | || ((new_cursor_type == BAR_CURSOR || new_cursor_type == HBAR_CURSOR) | |
21199 | && new_cursor_width != w->phys_cursor_width))) | |
21200 | erase_phys_cursor (w); | |
21201 | ||
21202 | /* Don't check phys_cursor_on_p here because that flag is only set | |
21203 | to zero in some cases where we know that the cursor has been | |
21204 | completely erased, to avoid the extra work of erasing the cursor | |
21205 | twice. In other words, phys_cursor_on_p can be 1 and the cursor | |
21206 | still not be visible, or it has only been partly erased. */ | |
21207 | if (on) | |
21208 | { | |
21209 | w->phys_cursor_ascent = glyph_row->ascent; | |
21210 | w->phys_cursor_height = glyph_row->height; | |
21211 | ||
21212 | /* Set phys_cursor_.* before x_draw_.* is called because some | |
21213 | of them may need the information. */ | |
21214 | w->phys_cursor.x = x; | |
21215 | w->phys_cursor.y = glyph_row->y; | |
21216 | w->phys_cursor.hpos = hpos; | |
21217 | w->phys_cursor.vpos = vpos; | |
21218 | } | |
21219 | ||
b4ebbb12 KS |
21220 | rif->draw_window_cursor (w, glyph_row, x, y, |
21221 | new_cursor_type, new_cursor_width, | |
21222 | on, active_cursor); | |
fa3c6b4d KS |
21223 | } |
21224 | ||
21225 | ||
21226 | /* Switch the display of W's cursor on or off, according to the value | |
21227 | of ON. */ | |
21228 | ||
21229 | static void | |
21230 | update_window_cursor (w, on) | |
21231 | struct window *w; | |
21232 | int on; | |
21233 | { | |
21234 | /* Don't update cursor in windows whose frame is in the process | |
21235 | of being deleted. */ | |
21236 | if (w->current_matrix) | |
21237 | { | |
21238 | BLOCK_INPUT; | |
21239 | display_and_set_cursor (w, on, w->phys_cursor.hpos, w->phys_cursor.vpos, | |
21240 | w->phys_cursor.x, w->phys_cursor.y); | |
21241 | UNBLOCK_INPUT; | |
21242 | } | |
21243 | } | |
21244 | ||
21245 | ||
21246 | /* Call update_window_cursor with parameter ON_P on all leaf windows | |
21247 | in the window tree rooted at W. */ | |
21248 | ||
21249 | static void | |
21250 | update_cursor_in_window_tree (w, on_p) | |
21251 | struct window *w; | |
21252 | int on_p; | |
21253 | { | |
21254 | while (w) | |
21255 | { | |
21256 | if (!NILP (w->hchild)) | |
21257 | update_cursor_in_window_tree (XWINDOW (w->hchild), on_p); | |
21258 | else if (!NILP (w->vchild)) | |
21259 | update_cursor_in_window_tree (XWINDOW (w->vchild), on_p); | |
21260 | else | |
21261 | update_window_cursor (w, on_p); | |
21262 | ||
21263 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
21264 | } | |
21265 | } | |
21266 | ||
21267 | ||
21268 | /* EXPORT: | |
21269 | Display the cursor on window W, or clear it, according to ON_P. | |
21270 | Don't change the cursor's position. */ | |
21271 | ||
21272 | void | |
21273 | x_update_cursor (f, on_p) | |
21274 | struct frame *f; | |
21275 | int on_p; | |
21276 | { | |
21277 | update_cursor_in_window_tree (XWINDOW (f->root_window), on_p); | |
21278 | } | |
21279 | ||
21280 | ||
21281 | /* EXPORT: | |
21282 | Clear the cursor of window W to background color, and mark the | |
21283 | cursor as not shown. This is used when the text where the cursor | |
21284 | is is about to be rewritten. */ | |
21285 | ||
21286 | void | |
21287 | x_clear_cursor (w) | |
21288 | struct window *w; | |
21289 | { | |
21290 | if (FRAME_VISIBLE_P (XFRAME (w->frame)) && w->phys_cursor_on_p) | |
21291 | update_window_cursor (w, 0); | |
21292 | } | |
21293 | ||
21294 | ||
21295 | /* EXPORT: | |
21296 | Display the active region described by mouse_face_* according to DRAW. */ | |
21297 | ||
21298 | void | |
21299 | show_mouse_face (dpyinfo, draw) | |
21300 | Display_Info *dpyinfo; | |
21301 | enum draw_glyphs_face draw; | |
21302 | { | |
21303 | struct window *w = XWINDOW (dpyinfo->mouse_face_window); | |
21304 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
21305 | ||
21306 | if (/* If window is in the process of being destroyed, don't bother | |
21307 | to do anything. */ | |
21308 | w->current_matrix != NULL | |
21309 | /* Don't update mouse highlight if hidden */ | |
21310 | && (draw != DRAW_MOUSE_FACE || !dpyinfo->mouse_face_hidden) | |
21311 | /* Recognize when we are called to operate on rows that don't exist | |
21312 | anymore. This can happen when a window is split. */ | |
21313 | && dpyinfo->mouse_face_end_row < w->current_matrix->nrows) | |
21314 | { | |
21315 | int phys_cursor_on_p = w->phys_cursor_on_p; | |
21316 | struct glyph_row *row, *first, *last; | |
21317 | ||
21318 | first = MATRIX_ROW (w->current_matrix, dpyinfo->mouse_face_beg_row); | |
21319 | last = MATRIX_ROW (w->current_matrix, dpyinfo->mouse_face_end_row); | |
21320 | ||
21321 | for (row = first; row <= last && row->enabled_p; ++row) | |
21322 | { | |
21323 | int start_hpos, end_hpos, start_x; | |
21324 | ||
21325 | /* For all but the first row, the highlight starts at column 0. */ | |
21326 | if (row == first) | |
21327 | { | |
21328 | start_hpos = dpyinfo->mouse_face_beg_col; | |
21329 | start_x = dpyinfo->mouse_face_beg_x; | |
21330 | } | |
21331 | else | |
21332 | { | |
21333 | start_hpos = 0; | |
21334 | start_x = 0; | |
21335 | } | |
21336 | ||
21337 | if (row == last) | |
21338 | end_hpos = dpyinfo->mouse_face_end_col; | |
21339 | else | |
8a658d94 KS |
21340 | { |
21341 | end_hpos = row->used[TEXT_AREA]; | |
21342 | if (draw == DRAW_NORMAL_TEXT) | |
21343 | row->fill_line_p = 1; /* Clear to end of line */ | |
21344 | } | |
fa3c6b4d KS |
21345 | |
21346 | if (end_hpos > start_hpos) | |
21347 | { | |
21348 | draw_glyphs (w, start_x, row, TEXT_AREA, | |
21349 | start_hpos, end_hpos, | |
21350 | draw, 0); | |
21351 | ||
21352 | row->mouse_face_p | |
21353 | = draw == DRAW_MOUSE_FACE || draw == DRAW_IMAGE_RAISED; | |
21354 | } | |
21355 | } | |
21356 | ||
21357 | /* When we've written over the cursor, arrange for it to | |
21358 | be displayed again. */ | |
21359 | if (phys_cursor_on_p && !w->phys_cursor_on_p) | |
21360 | { | |
21361 | BLOCK_INPUT; | |
21362 | display_and_set_cursor (w, 1, | |
21363 | w->phys_cursor.hpos, w->phys_cursor.vpos, | |
21364 | w->phys_cursor.x, w->phys_cursor.y); | |
21365 | UNBLOCK_INPUT; | |
21366 | } | |
21367 | } | |
21368 | ||
21369 | /* Change the mouse cursor. */ | |
21370 | if (draw == DRAW_NORMAL_TEXT) | |
21371 | rif->define_frame_cursor (f, FRAME_X_OUTPUT (f)->text_cursor); | |
21372 | else if (draw == DRAW_MOUSE_FACE) | |
21373 | rif->define_frame_cursor (f, FRAME_X_OUTPUT (f)->hand_cursor); | |
21374 | else | |
21375 | rif->define_frame_cursor (f, FRAME_X_OUTPUT (f)->nontext_cursor); | |
21376 | } | |
21377 | ||
21378 | /* EXPORT: | |
21379 | Clear out the mouse-highlighted active region. | |
21380 | Redraw it un-highlighted first. Value is non-zero if mouse | |
21381 | face was actually drawn unhighlighted. */ | |
21382 | ||
21383 | int | |
21384 | clear_mouse_face (dpyinfo) | |
21385 | Display_Info *dpyinfo; | |
21386 | { | |
21387 | int cleared = 0; | |
21388 | ||
867756d8 | 21389 | if (!dpyinfo->mouse_face_hidden && !NILP (dpyinfo->mouse_face_window)) |
fa3c6b4d KS |
21390 | { |
21391 | show_mouse_face (dpyinfo, DRAW_NORMAL_TEXT); | |
21392 | cleared = 1; | |
21393 | } | |
21394 | ||
21395 | dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1; | |
21396 | dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1; | |
21397 | dpyinfo->mouse_face_window = Qnil; | |
21398 | dpyinfo->mouse_face_overlay = Qnil; | |
21399 | return cleared; | |
21400 | } | |
21401 | ||
21402 | ||
21403 | /* EXPORT: | |
21404 | Non-zero if physical cursor of window W is within mouse face. */ | |
21405 | ||
21406 | int | |
21407 | cursor_in_mouse_face_p (w) | |
21408 | struct window *w; | |
21409 | { | |
21410 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (XFRAME (w->frame)); | |
21411 | int in_mouse_face = 0; | |
21412 | ||
21413 | if (WINDOWP (dpyinfo->mouse_face_window) | |
21414 | && XWINDOW (dpyinfo->mouse_face_window) == w) | |
21415 | { | |
21416 | int hpos = w->phys_cursor.hpos; | |
21417 | int vpos = w->phys_cursor.vpos; | |
21418 | ||
21419 | if (vpos >= dpyinfo->mouse_face_beg_row | |
21420 | && vpos <= dpyinfo->mouse_face_end_row | |
21421 | && (vpos > dpyinfo->mouse_face_beg_row | |
21422 | || hpos >= dpyinfo->mouse_face_beg_col) | |
21423 | && (vpos < dpyinfo->mouse_face_end_row | |
21424 | || hpos < dpyinfo->mouse_face_end_col | |
21425 | || dpyinfo->mouse_face_past_end)) | |
21426 | in_mouse_face = 1; | |
21427 | } | |
21428 | ||
21429 | return in_mouse_face; | |
21430 | } | |
21431 | ||
21432 | ||
21433 | ||
21434 | \f | |
21435 | /* Find the glyph matrix position of buffer position CHARPOS in window | |
21436 | *W. HPOS, *VPOS, *X, and *Y are set to the positions found. W's | |
21437 | current glyphs must be up to date. If CHARPOS is above window | |
21438 | start return (0, 0, 0, 0). If CHARPOS is after end of W, return end | |
21439 | of last line in W. In the row containing CHARPOS, stop before glyphs | |
21440 | having STOP as object. */ | |
21441 | ||
9c3521e0 | 21442 | #if 1 /* This is a version of fast_find_position that's more correct |
fa3c6b4d KS |
21443 | in the presence of hscrolling, for example. I didn't install |
21444 | it right away because the problem fixed is minor, it failed | |
21445 | in 20.x as well, and I think it's too risky to install | |
21446 | so near the release of 21.1. 2001-09-25 gerd. */ | |
21447 | ||
21448 | static int | |
21449 | fast_find_position (w, charpos, hpos, vpos, x, y, stop) | |
21450 | struct window *w; | |
21451 | int charpos; | |
21452 | int *hpos, *vpos, *x, *y; | |
21453 | Lisp_Object stop; | |
21454 | { | |
21455 | struct glyph_row *row, *first; | |
21456 | struct glyph *glyph, *end; | |
b19a5b64 | 21457 | int past_end = 0; |
fa3c6b4d KS |
21458 | |
21459 | first = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
a78bc3c0 KS |
21460 | if (charpos < MATRIX_ROW_START_CHARPOS (first)) |
21461 | { | |
21462 | *x = first->x; | |
21463 | *y = first->y; | |
21464 | *hpos = 0; | |
21465 | *vpos = MATRIX_ROW_VPOS (first, w->current_matrix); | |
21466 | return 1; | |
21467 | } | |
21468 | ||
fa3c6b4d KS |
21469 | row = row_containing_pos (w, charpos, first, NULL, 0); |
21470 | if (row == NULL) | |
21471 | { | |
a78bc3c0 KS |
21472 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
21473 | past_end = 1; | |
fa3c6b4d KS |
21474 | } |
21475 | ||
c6576d9d KS |
21476 | /* If whole rows or last part of a row came from a display overlay, |
21477 | row_containing_pos will skip over such rows because their end pos | |
e6d09683 RS |
21478 | equals the start pos of the overlay or interval. |
21479 | ||
21480 | Move back if we have a STOP object and previous row's | |
21481 | end glyph came from STOP. */ | |
c6576d9d KS |
21482 | if (!NILP (stop)) |
21483 | { | |
e3198b77 | 21484 | struct glyph_row *prev; |
c6576d9d KS |
21485 | while ((prev = row - 1, prev >= first) |
21486 | && MATRIX_ROW_END_CHARPOS (prev) == charpos | |
21487 | && prev->used[TEXT_AREA] > 0) | |
21488 | { | |
e6d09683 RS |
21489 | struct glyph *beg = prev->glyphs[TEXT_AREA]; |
21490 | glyph = beg + prev->used[TEXT_AREA]; | |
21491 | while (--glyph >= beg | |
c6576d9d | 21492 | && INTEGERP (glyph->object)); |
e6d09683 | 21493 | if (glyph < beg |
e3198b77 | 21494 | || !EQ (stop, glyph->object)) |
c6576d9d KS |
21495 | break; |
21496 | row = prev; | |
21497 | } | |
21498 | } | |
21499 | ||
fa3c6b4d KS |
21500 | *x = row->x; |
21501 | *y = row->y; | |
21502 | *vpos = MATRIX_ROW_VPOS (row, w->current_matrix); | |
21503 | ||
21504 | glyph = row->glyphs[TEXT_AREA]; | |
21505 | end = glyph + row->used[TEXT_AREA]; | |
21506 | ||
21507 | /* Skip over glyphs not having an object at the start of the row. | |
21508 | These are special glyphs like truncation marks on terminal | |
21509 | frames. */ | |
21510 | if (row->displays_text_p) | |
21511 | while (glyph < end | |
21512 | && INTEGERP (glyph->object) | |
21513 | && !EQ (stop, glyph->object) | |
21514 | && glyph->charpos < 0) | |
21515 | { | |
21516 | *x += glyph->pixel_width; | |
21517 | ++glyph; | |
21518 | } | |
21519 | ||
21520 | while (glyph < end | |
21521 | && !INTEGERP (glyph->object) | |
21522 | && !EQ (stop, glyph->object) | |
21523 | && (!BUFFERP (glyph->object) | |
21524 | || glyph->charpos < charpos)) | |
21525 | { | |
21526 | *x += glyph->pixel_width; | |
21527 | ++glyph; | |
21528 | } | |
21529 | ||
21530 | *hpos = glyph - row->glyphs[TEXT_AREA]; | |
7a272039 | 21531 | return !past_end; |
fa3c6b4d KS |
21532 | } |
21533 | ||
9c3521e0 | 21534 | #else /* not 1 */ |
fa3c6b4d KS |
21535 | |
21536 | static int | |
21537 | fast_find_position (w, pos, hpos, vpos, x, y, stop) | |
21538 | struct window *w; | |
21539 | int pos; | |
21540 | int *hpos, *vpos, *x, *y; | |
21541 | Lisp_Object stop; | |
21542 | { | |
21543 | int i; | |
21544 | int lastcol; | |
21545 | int maybe_next_line_p = 0; | |
21546 | int line_start_position; | |
21547 | int yb = window_text_bottom_y (w); | |
21548 | struct glyph_row *row, *best_row; | |
21549 | int row_vpos, best_row_vpos; | |
21550 | int current_x; | |
21551 | ||
21552 | row = best_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
21553 | row_vpos = best_row_vpos = MATRIX_ROW_VPOS (row, w->current_matrix); | |
21554 | ||
21555 | while (row->y < yb) | |
21556 | { | |
21557 | if (row->used[TEXT_AREA]) | |
21558 | line_start_position = row->glyphs[TEXT_AREA]->charpos; | |
21559 | else | |
21560 | line_start_position = 0; | |
21561 | ||
21562 | if (line_start_position > pos) | |
21563 | break; | |
21564 | /* If the position sought is the end of the buffer, | |
21565 | don't include the blank lines at the bottom of the window. */ | |
21566 | else if (line_start_position == pos | |
21567 | && pos == BUF_ZV (XBUFFER (w->buffer))) | |
21568 | { | |
21569 | maybe_next_line_p = 1; | |
21570 | break; | |
21571 | } | |
21572 | else if (line_start_position > 0) | |
21573 | { | |
21574 | best_row = row; | |
21575 | best_row_vpos = row_vpos; | |
21576 | } | |
21577 | ||
21578 | if (row->y + row->height >= yb) | |
21579 | break; | |
21580 | ||
21581 | ++row; | |
21582 | ++row_vpos; | |
21583 | } | |
21584 | ||
21585 | /* Find the right column within BEST_ROW. */ | |
21586 | lastcol = 0; | |
21587 | current_x = best_row->x; | |
21588 | for (i = 0; i < best_row->used[TEXT_AREA]; i++) | |
21589 | { | |
21590 | struct glyph *glyph = best_row->glyphs[TEXT_AREA] + i; | |
21591 | int charpos = glyph->charpos; | |
21592 | ||
21593 | if (BUFFERP (glyph->object)) | |
21594 | { | |
21595 | if (charpos == pos) | |
21596 | { | |
21597 | *hpos = i; | |
21598 | *vpos = best_row_vpos; | |
21599 | *x = current_x; | |
21600 | *y = best_row->y; | |
21601 | return 1; | |
21602 | } | |
21603 | else if (charpos > pos) | |
21604 | break; | |
21605 | } | |
21606 | else if (EQ (glyph->object, stop)) | |
21607 | break; | |
21608 | ||
21609 | if (charpos > 0) | |
21610 | lastcol = i; | |
21611 | current_x += glyph->pixel_width; | |
21612 | } | |
21613 | ||
21614 | /* If we're looking for the end of the buffer, | |
21615 | and we didn't find it in the line we scanned, | |
21616 | use the start of the following line. */ | |
21617 | if (maybe_next_line_p) | |
21618 | { | |
21619 | ++best_row; | |
21620 | ++best_row_vpos; | |
21621 | lastcol = 0; | |
21622 | current_x = best_row->x; | |
21623 | } | |
21624 | ||
21625 | *vpos = best_row_vpos; | |
21626 | *hpos = lastcol + 1; | |
21627 | *x = current_x; | |
21628 | *y = best_row->y; | |
21629 | return 0; | |
21630 | } | |
21631 | ||
9c3521e0 | 21632 | #endif /* not 1 */ |
fa3c6b4d KS |
21633 | |
21634 | ||
21635 | /* Find the position of the glyph for position POS in OBJECT in | |
21636 | window W's current matrix, and return in *X, *Y the pixel | |
21637 | coordinates, and return in *HPOS, *VPOS the column/row of the glyph. | |
21638 | ||
21639 | RIGHT_P non-zero means return the position of the right edge of the | |
21640 | glyph, RIGHT_P zero means return the left edge position. | |
21641 | ||
21642 | If no glyph for POS exists in the matrix, return the position of | |
21643 | the glyph with the next smaller position that is in the matrix, if | |
21644 | RIGHT_P is zero. If RIGHT_P is non-zero, and no glyph for POS | |
21645 | exists in the matrix, return the position of the glyph with the | |
21646 | next larger position in OBJECT. | |
21647 | ||
21648 | Value is non-zero if a glyph was found. */ | |
21649 | ||
21650 | static int | |
21651 | fast_find_string_pos (w, pos, object, hpos, vpos, x, y, right_p) | |
21652 | struct window *w; | |
21653 | int pos; | |
21654 | Lisp_Object object; | |
21655 | int *hpos, *vpos, *x, *y; | |
21656 | int right_p; | |
21657 | { | |
21658 | int yb = window_text_bottom_y (w); | |
21659 | struct glyph_row *r; | |
21660 | struct glyph *best_glyph = NULL; | |
21661 | struct glyph_row *best_row = NULL; | |
21662 | int best_x = 0; | |
21663 | ||
21664 | for (r = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
21665 | r->enabled_p && r->y < yb; | |
21666 | ++r) | |
21667 | { | |
21668 | struct glyph *g = r->glyphs[TEXT_AREA]; | |
21669 | struct glyph *e = g + r->used[TEXT_AREA]; | |
21670 | int gx; | |
21671 | ||
21672 | for (gx = r->x; g < e; gx += g->pixel_width, ++g) | |
21673 | if (EQ (g->object, object)) | |
21674 | { | |
21675 | if (g->charpos == pos) | |
21676 | { | |
21677 | best_glyph = g; | |
21678 | best_x = gx; | |
21679 | best_row = r; | |
21680 | goto found; | |
21681 | } | |
21682 | else if (best_glyph == NULL | |
21683 | || ((abs (g->charpos - pos) | |
21684 | < abs (best_glyph->charpos - pos)) | |
21685 | && (right_p | |
21686 | ? g->charpos < pos | |
21687 | : g->charpos > pos))) | |
21688 | { | |
21689 | best_glyph = g; | |
21690 | best_x = gx; | |
21691 | best_row = r; | |
21692 | } | |
21693 | } | |
21694 | } | |
21695 | ||
21696 | found: | |
21697 | ||
21698 | if (best_glyph) | |
21699 | { | |
21700 | *x = best_x; | |
21701 | *hpos = best_glyph - best_row->glyphs[TEXT_AREA]; | |
21702 | ||
21703 | if (right_p) | |
21704 | { | |
21705 | *x += best_glyph->pixel_width; | |
21706 | ++*hpos; | |
21707 | } | |
21708 | ||
21709 | *y = best_row->y; | |
21710 | *vpos = best_row - w->current_matrix->rows; | |
21711 | } | |
21712 | ||
21713 | return best_glyph != NULL; | |
21714 | } | |
21715 | ||
21716 | ||
493fdc3c KS |
21717 | /* See if position X, Y is within a hot-spot of an image. */ |
21718 | ||
21719 | static int | |
21720 | on_hot_spot_p (hot_spot, x, y) | |
21721 | Lisp_Object hot_spot; | |
21722 | int x, y; | |
21723 | { | |
21724 | if (!CONSP (hot_spot)) | |
21725 | return 0; | |
21726 | ||
21727 | if (EQ (XCAR (hot_spot), Qrect)) | |
21728 | { | |
21729 | /* CDR is (Top-Left . Bottom-Right) = ((x0 . y0) . (x1 . y1)) */ | |
21730 | Lisp_Object rect = XCDR (hot_spot); | |
21731 | Lisp_Object tem; | |
21732 | if (!CONSP (rect)) | |
21733 | return 0; | |
21734 | if (!CONSP (XCAR (rect))) | |
21735 | return 0; | |
21736 | if (!CONSP (XCDR (rect))) | |
21737 | return 0; | |
21738 | if (!(tem = XCAR (XCAR (rect)), INTEGERP (tem) && x >= XINT (tem))) | |
21739 | return 0; | |
21740 | if (!(tem = XCDR (XCAR (rect)), INTEGERP (tem) && y >= XINT (tem))) | |
21741 | return 0; | |
21742 | if (!(tem = XCAR (XCDR (rect)), INTEGERP (tem) && x <= XINT (tem))) | |
21743 | return 0; | |
21744 | if (!(tem = XCDR (XCDR (rect)), INTEGERP (tem) && y <= XINT (tem))) | |
21745 | return 0; | |
21746 | return 1; | |
21747 | } | |
21748 | else if (EQ (XCAR (hot_spot), Qcircle)) | |
21749 | { | |
21750 | /* CDR is (Center . Radius) = ((x0 . y0) . r) */ | |
21751 | Lisp_Object circ = XCDR (hot_spot); | |
21752 | Lisp_Object lr, lx0, ly0; | |
21753 | if (CONSP (circ) | |
21754 | && CONSP (XCAR (circ)) | |
21755 | && (lr = XCDR (circ), INTEGERP (lr) || FLOATP (lr)) | |
21756 | && (lx0 = XCAR (XCAR (circ)), INTEGERP (lx0)) | |
21757 | && (ly0 = XCDR (XCAR (circ)), INTEGERP (ly0))) | |
21758 | { | |
21759 | double r = XFLOATINT (lr); | |
21760 | double dx = XINT (lx0) - x; | |
21761 | double dy = XINT (ly0) - y; | |
21762 | return (dx * dx + dy * dy <= r * r); | |
21763 | } | |
21764 | } | |
21765 | else if (EQ (XCAR (hot_spot), Qpoly)) | |
21766 | { | |
21767 | /* CDR is [x0 y0 x1 y1 x2 y2 ...x(n-1) y(n-1)] */ | |
21768 | if (VECTORP (XCDR (hot_spot))) | |
21769 | { | |
21770 | struct Lisp_Vector *v = XVECTOR (XCDR (hot_spot)); | |
21771 | Lisp_Object *poly = v->contents; | |
21772 | int n = v->size; | |
21773 | int i; | |
21774 | int inside = 0; | |
21775 | Lisp_Object lx, ly; | |
21776 | int x0, y0; | |
21777 | ||
21778 | /* Need an even number of coordinates, and at least 3 edges. */ | |
be21b925 | 21779 | if (n < 6 || n & 1) |
493fdc3c KS |
21780 | return 0; |
21781 | ||
21782 | /* Count edge segments intersecting line from (X,Y) to (X,infinity). | |
21783 | If count is odd, we are inside polygon. Pixels on edges | |
21784 | may or may not be included depending on actual geometry of the | |
21785 | polygon. */ | |
21786 | if ((lx = poly[n-2], !INTEGERP (lx)) | |
21787 | || (ly = poly[n-1], !INTEGERP (lx))) | |
21788 | return 0; | |
21789 | x0 = XINT (lx), y0 = XINT (ly); | |
21790 | for (i = 0; i < n; i += 2) | |
21791 | { | |
21792 | int x1 = x0, y1 = y0; | |
21793 | if ((lx = poly[i], !INTEGERP (lx)) | |
21794 | || (ly = poly[i+1], !INTEGERP (ly))) | |
21795 | return 0; | |
21796 | x0 = XINT (lx), y0 = XINT (ly); | |
21797 | ||
21798 | /* Does this segment cross the X line? */ | |
21799 | if (x0 >= x) | |
21800 | { | |
21801 | if (x1 >= x) | |
21802 | continue; | |
21803 | } | |
21804 | else if (x1 < x) | |
21805 | continue; | |
21806 | if (y > y0 && y > y1) | |
21807 | continue; | |
21808 | if (y < y0 + ((y1 - y0) * (x - x0)) / (x1 - x0)) | |
21809 | inside = !inside; | |
21810 | } | |
21811 | return inside; | |
21812 | } | |
21813 | } | |
b1c2132c SM |
21814 | /* If we don't understand the format, pretend we're not in the hot-spot. */ |
21815 | return 0; | |
493fdc3c KS |
21816 | } |
21817 | ||
21818 | Lisp_Object | |
21819 | find_hot_spot (map, x, y) | |
21820 | Lisp_Object map; | |
21821 | int x, y; | |
21822 | { | |
21823 | while (CONSP (map)) | |
21824 | { | |
21825 | if (CONSP (XCAR (map)) | |
21826 | && on_hot_spot_p (XCAR (XCAR (map)), x, y)) | |
21827 | return XCAR (map); | |
21828 | map = XCDR (map); | |
21829 | } | |
be21b925 | 21830 | |
493fdc3c KS |
21831 | return Qnil; |
21832 | } | |
21833 | ||
21834 | DEFUN ("lookup-image-map", Flookup_image_map, Slookup_image_map, | |
21835 | 3, 3, 0, | |
be21b925 | 21836 | doc: /* Lookup in image map MAP coordinates X and Y. |
493fdc3c KS |
21837 | An image map is an alist where each element has the format (AREA ID PLIST). |
21838 | An AREA is specified as either a rectangle, a circle, or a polygon: | |
21839 | A rectangle is a cons (rect . ((x0 . y0) . (x1 . y1))) specifying the | |
21840 | pixel coordinates of the upper left and bottom right corners. | |
21841 | A circle is a cons (circle . ((x0 . y0) . r)) specifying the center | |
21842 | and the radius of the circle; r may be a float or integer. | |
21843 | A polygon is a cons (poly . [x0 y0 x1 y1 ...]) where each pair in the | |
21844 | vector describes one corner in the polygon. | |
21845 | Returns the alist element for the first matching AREA in MAP. */) | |
21846 | (map, x, y) | |
21847 | Lisp_Object map; | |
21848 | Lisp_Object x, y; | |
21849 | { | |
493fdc3c KS |
21850 | if (NILP (map)) |
21851 | return Qnil; | |
21852 | ||
6d925726 KS |
21853 | CHECK_NUMBER (x); |
21854 | CHECK_NUMBER (y); | |
493fdc3c KS |
21855 | |
21856 | return find_hot_spot (map, XINT (x), XINT (y)); | |
21857 | } | |
21858 | ||
21859 | ||
21860 | /* Display frame CURSOR, optionally using shape defined by POINTER. */ | |
21861 | static void | |
21862 | define_frame_cursor1 (f, cursor, pointer) | |
21863 | struct frame *f; | |
21864 | Cursor cursor; | |
21865 | Lisp_Object pointer; | |
21866 | { | |
562020fe KS |
21867 | /* Do not change cursor shape while dragging mouse. */ |
21868 | if (!NILP (do_mouse_tracking)) | |
21869 | return; | |
21870 | ||
493fdc3c KS |
21871 | if (!NILP (pointer)) |
21872 | { | |
21873 | if (EQ (pointer, Qarrow)) | |
21874 | cursor = FRAME_X_OUTPUT (f)->nontext_cursor; | |
21875 | else if (EQ (pointer, Qhand)) | |
21876 | cursor = FRAME_X_OUTPUT (f)->hand_cursor; | |
21877 | else if (EQ (pointer, Qtext)) | |
21878 | cursor = FRAME_X_OUTPUT (f)->text_cursor; | |
21879 | else if (EQ (pointer, intern ("hdrag"))) | |
21880 | cursor = FRAME_X_OUTPUT (f)->horizontal_drag_cursor; | |
21881 | #ifdef HAVE_X_WINDOWS | |
21882 | else if (EQ (pointer, intern ("vdrag"))) | |
21883 | cursor = FRAME_X_DISPLAY_INFO (f)->vertical_scroll_bar_cursor; | |
21884 | #endif | |
21885 | else if (EQ (pointer, intern ("hourglass"))) | |
21886 | cursor = FRAME_X_OUTPUT (f)->hourglass_cursor; | |
21887 | else if (EQ (pointer, Qmodeline)) | |
21888 | cursor = FRAME_X_OUTPUT (f)->modeline_cursor; | |
21889 | else | |
21890 | cursor = FRAME_X_OUTPUT (f)->nontext_cursor; | |
21891 | } | |
21892 | ||
493fdc3c | 21893 | if (cursor != No_Cursor) |
493fdc3c KS |
21894 | rif->define_frame_cursor (f, cursor); |
21895 | } | |
21896 | ||
fa3c6b4d KS |
21897 | /* Take proper action when mouse has moved to the mode or header line |
21898 | or marginal area AREA of window W, x-position X and y-position Y. | |
21899 | X is relative to the start of the text display area of W, so the | |
21900 | width of bitmap areas and scroll bars must be subtracted to get a | |
21901 | position relative to the start of the mode line. */ | |
21902 | ||
21903 | static void | |
359e4563 MY |
21904 | note_mode_line_or_margin_highlight (window, x, y, area) |
21905 | Lisp_Object window; | |
fa3c6b4d KS |
21906 | int x, y; |
21907 | enum window_part area; | |
21908 | { | |
359e4563 | 21909 | struct window *w = XWINDOW (window); |
fa3c6b4d KS |
21910 | struct frame *f = XFRAME (w->frame); |
21911 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
f65536fa | 21912 | Cursor cursor = FRAME_X_OUTPUT (f)->nontext_cursor; |
493fdc3c | 21913 | Lisp_Object pointer = Qnil; |
349c653e KS |
21914 | int charpos, dx, dy, width, height; |
21915 | Lisp_Object string, object = Qnil; | |
b1c2132c | 21916 | Lisp_Object pos, help; |
fa3c6b4d | 21917 | |
359e4563 MY |
21918 | Lisp_Object mouse_face; |
21919 | int original_x_pixel = x; | |
21920 | struct glyph * glyph = NULL; | |
55ce5058 MY |
21921 | struct glyph_row *row; |
21922 | ||
fa3c6b4d | 21923 | if (area == ON_MODE_LINE || area == ON_HEADER_LINE) |
359e4563 MY |
21924 | { |
21925 | int x0; | |
21926 | struct glyph *end; | |
21927 | ||
21928 | string = mode_line_string (w, area, &x, &y, &charpos, | |
21929 | &object, &dx, &dy, &width, &height); | |
21930 | ||
6d0e6660 RS |
21931 | row = (area == ON_MODE_LINE |
21932 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
21933 | : MATRIX_HEADER_LINE_ROW (w->current_matrix)); | |
55ce5058 | 21934 | |
359e4563 MY |
21935 | /* Find glyph */ |
21936 | if (row->mode_line_p && row->enabled_p) | |
21937 | { | |
21938 | glyph = row->glyphs[TEXT_AREA]; | |
21939 | end = glyph + row->used[TEXT_AREA]; | |
55ce5058 MY |
21940 | |
21941 | for (x0 = original_x_pixel; | |
21942 | glyph < end && x0 >= glyph->pixel_width; | |
359e4563 MY |
21943 | ++glyph) |
21944 | x0 -= glyph->pixel_width; | |
55ce5058 | 21945 | |
359e4563 MY |
21946 | if (glyph >= end) |
21947 | glyph = NULL; | |
21948 | } | |
21949 | } | |
fa3c6b4d | 21950 | else |
493fdc3c KS |
21951 | { |
21952 | x -= WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (w); | |
349c653e KS |
21953 | string = marginal_area_string (w, area, &x, &y, &charpos, |
21954 | &object, &dx, &dy, &width, &height); | |
493fdc3c KS |
21955 | } |
21956 | ||
21957 | help = Qnil; | |
fa3c6b4d | 21958 | |
349c653e | 21959 | if (IMAGEP (object)) |
493fdc3c KS |
21960 | { |
21961 | Lisp_Object image_map, hotspot; | |
bccf59df | 21962 | if ((image_map = Fplist_get (XCDR (object), QCmap), |
493fdc3c KS |
21963 | !NILP (image_map)) |
21964 | && (hotspot = find_hot_spot (image_map, dx, dy), | |
21965 | CONSP (hotspot)) | |
21966 | && (hotspot = XCDR (hotspot), CONSP (hotspot))) | |
21967 | { | |
21968 | Lisp_Object area_id, plist; | |
fa3c6b4d | 21969 | |
493fdc3c KS |
21970 | area_id = XCAR (hotspot); |
21971 | /* Could check AREA_ID to see if we enter/leave this hot-spot. | |
21972 | If so, we could look for mouse-enter, mouse-leave | |
21973 | properties in PLIST (and do something...). */ | |
109b593f KS |
21974 | hotspot = XCDR (hotspot); |
21975 | if (CONSP (hotspot) | |
21976 | && (plist = XCAR (hotspot), CONSP (plist))) | |
493fdc3c | 21977 | { |
bccf59df | 21978 | pointer = Fplist_get (plist, Qpointer); |
493fdc3c KS |
21979 | if (NILP (pointer)) |
21980 | pointer = Qhand; | |
bccf59df | 21981 | help = Fplist_get (plist, Qhelp_echo); |
493fdc3c KS |
21982 | if (!NILP (help)) |
21983 | { | |
21984 | help_echo_string = help; | |
21985 | /* Is this correct? ++kfs */ | |
21986 | XSETWINDOW (help_echo_window, w); | |
21987 | help_echo_object = w->buffer; | |
21988 | help_echo_pos = charpos; | |
21989 | } | |
21990 | } | |
349c653e | 21991 | } |
9c25f170 | 21992 | if (NILP (pointer)) |
bccf59df | 21993 | pointer = Fplist_get (XCDR (object), QCpointer); |
349c653e KS |
21994 | } |
21995 | ||
21996 | if (STRINGP (string)) | |
21997 | { | |
21998 | pos = make_number (charpos); | |
21999 | /* If we're on a string with `help-echo' text property, arrange | |
22000 | for the help to be displayed. This is done by setting the | |
22001 | global variable help_echo_string to the help string. */ | |
425daf4a | 22002 | if (NILP (help)) |
349c653e | 22003 | { |
425daf4a KS |
22004 | help = Fget_text_property (pos, Qhelp_echo, string); |
22005 | if (!NILP (help)) | |
22006 | { | |
22007 | help_echo_string = help; | |
22008 | XSETWINDOW (help_echo_window, w); | |
22009 | help_echo_object = string; | |
22010 | help_echo_pos = charpos; | |
22011 | } | |
349c653e KS |
22012 | } |
22013 | ||
22014 | if (NILP (pointer)) | |
22015 | pointer = Fget_text_property (pos, Qpointer, string); | |
22016 | ||
22017 | /* Change the mouse pointer according to what is under X/Y. */ | |
73bc43da | 22018 | if (NILP (pointer) && ((area == ON_MODE_LINE) || (area == ON_HEADER_LINE))) |
349c653e KS |
22019 | { |
22020 | Lisp_Object map; | |
22021 | map = Fget_text_property (pos, Qlocal_map, string); | |
22022 | if (!KEYMAPP (map)) | |
22023 | map = Fget_text_property (pos, Qkeymap, string); | |
22024 | if (!KEYMAPP (map)) | |
22025 | cursor = dpyinfo->vertical_scroll_bar_cursor; | |
493fdc3c | 22026 | } |
55ce5058 | 22027 | |
359e4563 MY |
22028 | /* Change the mouse face according to what is under X/Y. */ |
22029 | mouse_face = Fget_text_property (pos, Qmouse_face, string); | |
22030 | if (!NILP (mouse_face) | |
22031 | && ((area == ON_MODE_LINE) || (area == ON_HEADER_LINE)) | |
22032 | && glyph) | |
22033 | { | |
22034 | Lisp_Object b, e; | |
22035 | ||
22036 | struct glyph * tmp_glyph; | |
22037 | ||
22038 | int gpos; | |
22039 | int gseq_length; | |
22040 | int total_pixel_width; | |
22041 | int ignore; | |
22042 | ||
602907ae | 22043 | int vpos, hpos; |
121c59a3 | 22044 | |
6d0e6660 RS |
22045 | b = Fprevious_single_property_change (make_number (charpos + 1), |
22046 | Qmouse_face, string, Qnil); | |
55ce5058 MY |
22047 | if (NILP (b)) |
22048 | b = make_number (0); | |
22049 | ||
22050 | e = Fnext_single_property_change (pos, Qmouse_face, string, Qnil); | |
22051 | if (NILP (e)) | |
22052 | e = make_number (SCHARS (string)); | |
22053 | ||
22054 | /* Calculate the position(glyph position: GPOS) of GLYPH in | |
22055 | displayed string. GPOS is different from CHARPOS. | |
22056 | ||
359e4563 MY |
22057 | CHARPOS is the position of glyph in internal string |
22058 | object. A mode line string format has structures which | |
22059 | is converted to a flatten by emacs lisp interpreter. | |
22060 | The internal string is an element of the structures. | |
22061 | The displayed string is the flatten string. */ | |
55ce5058 | 22062 | for (tmp_glyph = glyph - 1, gpos = 0; |
6d0e6660 | 22063 | tmp_glyph->charpos >= XINT (b); |
359e4563 MY |
22064 | tmp_glyph--, gpos++) |
22065 | { | |
3c1b433a | 22066 | if (!EQ (tmp_glyph->object, glyph->object)) |
359e4563 MY |
22067 | break; |
22068 | } | |
22069 | ||
22070 | /* Calculate the lenght(glyph sequence length: GSEQ_LENGTH) of | |
55ce5058 | 22071 | displayed string holding GLYPH. |
359e4563 MY |
22072 | |
22073 | GSEQ_LENGTH is different from SCHARS (STRING). | |
22074 | SCHARS (STRING) returns the length of the internal string. */ | |
22075 | for (tmp_glyph = glyph, gseq_length = gpos; | |
6d0e6660 | 22076 | tmp_glyph->charpos < XINT (e); |
359e4563 MY |
22077 | tmp_glyph++, gseq_length++) |
22078 | { | |
3c1b433a | 22079 | if (!EQ (tmp_glyph->object, glyph->object)) |
359e4563 MY |
22080 | break; |
22081 | } | |
359e4563 MY |
22082 | |
22083 | total_pixel_width = 0; | |
55ce5058 | 22084 | for (tmp_glyph = glyph - gpos; tmp_glyph != glyph; tmp_glyph++) |
359e4563 | 22085 | total_pixel_width += tmp_glyph->pixel_width; |
55ce5058 | 22086 | |
602907ae MY |
22087 | /* Pre calculation of re-rendering position */ |
22088 | vpos = (x - gpos); | |
22089 | hpos = (area == ON_MODE_LINE | |
22090 | ? (w->current_matrix)->nrows - 1 | |
22091 | : 0); | |
121c59a3 | 22092 | |
602907ae MY |
22093 | /* If the re-rendering position is included in the last |
22094 | re-rendering area, we should do nothing. */ | |
b78ab259 | 22095 | if ( EQ (window, dpyinfo->mouse_face_window) |
602907ae MY |
22096 | && dpyinfo->mouse_face_beg_col <= vpos |
22097 | && vpos < dpyinfo->mouse_face_end_col | |
22098 | && dpyinfo->mouse_face_beg_row == hpos ) | |
22099 | return; | |
121c59a3 | 22100 | |
602907ae MY |
22101 | if (clear_mouse_face (dpyinfo)) |
22102 | cursor = No_Cursor; | |
121c59a3 | 22103 | |
602907ae MY |
22104 | dpyinfo->mouse_face_beg_col = vpos; |
22105 | dpyinfo->mouse_face_beg_row = hpos; | |
359e4563 MY |
22106 | |
22107 | dpyinfo->mouse_face_beg_x = original_x_pixel - (total_pixel_width + dx); | |
22108 | dpyinfo->mouse_face_beg_y = 0; | |
55ce5058 | 22109 | |
602907ae | 22110 | dpyinfo->mouse_face_end_col = vpos + gseq_length; |
359e4563 MY |
22111 | dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_beg_row; |
22112 | ||
22113 | dpyinfo->mouse_face_end_x = 0; | |
22114 | dpyinfo->mouse_face_end_y = 0; | |
22115 | ||
22116 | dpyinfo->mouse_face_past_end = 0; | |
22117 | dpyinfo->mouse_face_window = window; | |
22118 | ||
6d0e6660 RS |
22119 | dpyinfo->mouse_face_face_id = face_at_string_position (w, string, |
22120 | charpos, | |
22121 | 0, 0, 0, &ignore, | |
22122 | glyph->face_id, 1); | |
359e4563 | 22123 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); |
edfaeb4e MY |
22124 | |
22125 | if (NILP (pointer)) | |
22126 | pointer = Qhand; | |
359e4563 | 22127 | } |
121c59a3 MY |
22128 | else if ((area == ON_MODE_LINE) || (area == ON_HEADER_LINE)) |
22129 | clear_mouse_face (dpyinfo); | |
493fdc3c | 22130 | } |
493fdc3c | 22131 | define_frame_cursor1 (f, cursor, pointer); |
fa3c6b4d KS |
22132 | } |
22133 | ||
fa3c6b4d KS |
22134 | |
22135 | /* EXPORT: | |
22136 | Take proper action when the mouse has moved to position X, Y on | |
22137 | frame F as regards highlighting characters that have mouse-face | |
22138 | properties. Also de-highlighting chars where the mouse was before. | |
22139 | X and Y can be negative or out of range. */ | |
22140 | ||
22141 | void | |
22142 | note_mouse_highlight (f, x, y) | |
22143 | struct frame *f; | |
22144 | int x, y; | |
22145 | { | |
22146 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
22147 | enum window_part part; | |
22148 | Lisp_Object window; | |
22149 | struct window *w; | |
22150 | Cursor cursor = No_Cursor; | |
493fdc3c | 22151 | Lisp_Object pointer = Qnil; /* Takes precedence over cursor! */ |
fa3c6b4d KS |
22152 | struct buffer *b; |
22153 | ||
22154 | /* When a menu is active, don't highlight because this looks odd. */ | |
22155 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) || defined (HAVE_NTGUI) | |
22156 | if (popup_activated ()) | |
22157 | return; | |
22158 | #endif | |
22159 | ||
22160 | if (NILP (Vmouse_highlight) | |
22161 | || !f->glyphs_initialized_p) | |
22162 | return; | |
22163 | ||
22164 | dpyinfo->mouse_face_mouse_x = x; | |
22165 | dpyinfo->mouse_face_mouse_y = y; | |
22166 | dpyinfo->mouse_face_mouse_frame = f; | |
22167 | ||
22168 | if (dpyinfo->mouse_face_defer) | |
22169 | return; | |
22170 | ||
22171 | if (gc_in_progress) | |
22172 | { | |
22173 | dpyinfo->mouse_face_deferred_gc = 1; | |
22174 | return; | |
22175 | } | |
22176 | ||
22177 | /* Which window is that in? */ | |
da8b7f4f | 22178 | window = window_from_coordinates (f, x, y, &part, 0, 0, 1); |
fa3c6b4d | 22179 | |
4674c583 KS |
22180 | /* If we were displaying active text in another window, clear that. |
22181 | Also clear if we move out of text area in same window. */ | |
22182 | if (! EQ (window, dpyinfo->mouse_face_window) | |
0afd0871 | 22183 | || (part != ON_TEXT && part != ON_MODE_LINE && part != ON_HEADER_LINE |
602907ae | 22184 | && !NILP (dpyinfo->mouse_face_window))) |
fa3c6b4d KS |
22185 | clear_mouse_face (dpyinfo); |
22186 | ||
22187 | /* Not on a window -> return. */ | |
22188 | if (!WINDOWP (window)) | |
22189 | return; | |
22190 | ||
22191 | /* Reset help_echo_string. It will get recomputed below. */ | |
fa3c6b4d KS |
22192 | help_echo_string = Qnil; |
22193 | ||
22194 | /* Convert to window-relative pixel coordinates. */ | |
22195 | w = XWINDOW (window); | |
22196 | frame_to_window_pixel_xy (w, &x, &y); | |
22197 | ||
22198 | /* Handle tool-bar window differently since it doesn't display a | |
22199 | buffer. */ | |
22200 | if (EQ (window, f->tool_bar_window)) | |
22201 | { | |
22202 | note_tool_bar_highlight (f, x, y); | |
22203 | return; | |
22204 | } | |
22205 | ||
fa3c6b4d KS |
22206 | /* Mouse is on the mode, header line or margin? */ |
22207 | if (part == ON_MODE_LINE || part == ON_HEADER_LINE | |
22208 | || part == ON_LEFT_MARGIN || part == ON_RIGHT_MARGIN) | |
22209 | { | |
359e4563 | 22210 | note_mode_line_or_margin_highlight (window, x, y, part); |
fa3c6b4d KS |
22211 | return; |
22212 | } | |
fa3c6b4d KS |
22213 | |
22214 | if (part == ON_VERTICAL_BORDER) | |
22215 | cursor = FRAME_X_OUTPUT (f)->horizontal_drag_cursor; | |
b15de414 ST |
22216 | else if (part == ON_LEFT_FRINGE || part == ON_RIGHT_FRINGE |
22217 | || part == ON_SCROLL_BAR) | |
f65536fa | 22218 | cursor = FRAME_X_OUTPUT (f)->nontext_cursor; |
fa3c6b4d KS |
22219 | else |
22220 | cursor = FRAME_X_OUTPUT (f)->text_cursor; | |
22221 | ||
22222 | /* Are we in a window whose display is up to date? | |
22223 | And verify the buffer's text has not changed. */ | |
22224 | b = XBUFFER (w->buffer); | |
22225 | if (part == ON_TEXT | |
22226 | && EQ (w->window_end_valid, w->buffer) | |
22227 | && XFASTINT (w->last_modified) == BUF_MODIFF (b) | |
22228 | && XFASTINT (w->last_overlay_modified) == BUF_OVERLAY_MODIFF (b)) | |
22229 | { | |
493fdc3c | 22230 | int hpos, vpos, pos, i, dx, dy, area; |
fa3c6b4d KS |
22231 | struct glyph *glyph; |
22232 | Lisp_Object object; | |
22233 | Lisp_Object mouse_face = Qnil, overlay = Qnil, position; | |
22234 | Lisp_Object *overlay_vec = NULL; | |
7994a991 | 22235 | int noverlays; |
fa3c6b4d KS |
22236 | struct buffer *obuf; |
22237 | int obegv, ozv, same_region; | |
22238 | ||
22239 | /* Find the glyph under X/Y. */ | |
493fdc3c KS |
22240 | glyph = x_y_to_hpos_vpos (w, x, y, &hpos, &vpos, &dx, &dy, &area); |
22241 | ||
22242 | /* Look for :pointer property on image. */ | |
22243 | if (glyph != NULL && glyph->type == IMAGE_GLYPH) | |
22244 | { | |
22245 | struct image *img = IMAGE_FROM_ID (f, glyph->u.img_id); | |
22246 | if (img != NULL && IMAGEP (img->spec)) | |
22247 | { | |
22248 | Lisp_Object image_map, hotspot; | |
bccf59df | 22249 | if ((image_map = Fplist_get (XCDR (img->spec), QCmap), |
493fdc3c | 22250 | !NILP (image_map)) |
e893970b KS |
22251 | && (hotspot = find_hot_spot (image_map, |
22252 | glyph->slice.x + dx, | |
22253 | glyph->slice.y + dy), | |
493fdc3c KS |
22254 | CONSP (hotspot)) |
22255 | && (hotspot = XCDR (hotspot), CONSP (hotspot))) | |
22256 | { | |
22257 | Lisp_Object area_id, plist; | |
22258 | ||
22259 | area_id = XCAR (hotspot); | |
22260 | /* Could check AREA_ID to see if we enter/leave this hot-spot. | |
22261 | If so, we could look for mouse-enter, mouse-leave | |
22262 | properties in PLIST (and do something...). */ | |
109b593f KS |
22263 | hotspot = XCDR (hotspot); |
22264 | if (CONSP (hotspot) | |
22265 | && (plist = XCAR (hotspot), CONSP (plist))) | |
493fdc3c | 22266 | { |
bccf59df | 22267 | pointer = Fplist_get (plist, Qpointer); |
493fdc3c KS |
22268 | if (NILP (pointer)) |
22269 | pointer = Qhand; | |
bccf59df | 22270 | help_echo_string = Fplist_get (plist, Qhelp_echo); |
493fdc3c KS |
22271 | if (!NILP (help_echo_string)) |
22272 | { | |
22273 | help_echo_window = window; | |
22274 | help_echo_object = glyph->object; | |
22275 | help_echo_pos = glyph->charpos; | |
22276 | } | |
22277 | } | |
22278 | } | |
22279 | if (NILP (pointer)) | |
bccf59df | 22280 | pointer = Fplist_get (XCDR (img->spec), QCpointer); |
493fdc3c KS |
22281 | } |
22282 | } | |
fa3c6b4d KS |
22283 | |
22284 | /* Clear mouse face if X/Y not over text. */ | |
22285 | if (glyph == NULL | |
22286 | || area != TEXT_AREA | |
22287 | || !MATRIX_ROW (w->current_matrix, vpos)->displays_text_p) | |
22288 | { | |
fa3c6b4d KS |
22289 | if (clear_mouse_face (dpyinfo)) |
22290 | cursor = No_Cursor; | |
493fdc3c KS |
22291 | if (NILP (pointer)) |
22292 | { | |
22293 | if (area != TEXT_AREA) | |
22294 | cursor = FRAME_X_OUTPUT (f)->nontext_cursor; | |
22295 | else | |
22296 | pointer = Vvoid_text_area_pointer; | |
22297 | } | |
fa3c6b4d KS |
22298 | goto set_cursor; |
22299 | } | |
22300 | ||
22301 | pos = glyph->charpos; | |
22302 | object = glyph->object; | |
22303 | if (!STRINGP (object) && !BUFFERP (object)) | |
22304 | goto set_cursor; | |
22305 | ||
22306 | /* If we get an out-of-range value, return now; avoid an error. */ | |
22307 | if (BUFFERP (object) && pos > BUF_Z (b)) | |
22308 | goto set_cursor; | |
22309 | ||
22310 | /* Make the window's buffer temporarily current for | |
22311 | overlays_at and compute_char_face. */ | |
22312 | obuf = current_buffer; | |
22313 | current_buffer = b; | |
22314 | obegv = BEGV; | |
22315 | ozv = ZV; | |
22316 | BEGV = BEG; | |
22317 | ZV = Z; | |
22318 | ||
22319 | /* Is this char mouse-active or does it have help-echo? */ | |
22320 | position = make_number (pos); | |
22321 | ||
22322 | if (BUFFERP (object)) | |
22323 | { | |
7994a991 KS |
22324 | /* Put all the overlays we want in a vector in overlay_vec. */ |
22325 | GET_OVERLAYS_AT (pos, overlay_vec, noverlays, NULL, 0); | |
fa3c6b4d KS |
22326 | /* Sort overlays into increasing priority order. */ |
22327 | noverlays = sort_overlays (overlay_vec, noverlays, w); | |
22328 | } | |
22329 | else | |
22330 | noverlays = 0; | |
22331 | ||
22332 | same_region = (EQ (window, dpyinfo->mouse_face_window) | |
22333 | && vpos >= dpyinfo->mouse_face_beg_row | |
22334 | && vpos <= dpyinfo->mouse_face_end_row | |
22335 | && (vpos > dpyinfo->mouse_face_beg_row | |
22336 | || hpos >= dpyinfo->mouse_face_beg_col) | |
22337 | && (vpos < dpyinfo->mouse_face_end_row | |
22338 | || hpos < dpyinfo->mouse_face_end_col | |
22339 | || dpyinfo->mouse_face_past_end)); | |
22340 | ||
22341 | if (same_region) | |
22342 | cursor = No_Cursor; | |
22343 | ||
22344 | /* Check mouse-face highlighting. */ | |
22345 | if (! same_region | |
22346 | /* If there exists an overlay with mouse-face overlapping | |
22347 | the one we are currently highlighting, we have to | |
22348 | check if we enter the overlapping overlay, and then | |
22349 | highlight only that. */ | |
22350 | || (OVERLAYP (dpyinfo->mouse_face_overlay) | |
22351 | && mouse_face_overlay_overlaps (dpyinfo->mouse_face_overlay))) | |
22352 | { | |
22353 | /* Find the highest priority overlay that has a mouse-face | |
22354 | property. */ | |
22355 | overlay = Qnil; | |
22356 | for (i = noverlays - 1; i >= 0 && NILP (overlay); --i) | |
22357 | { | |
22358 | mouse_face = Foverlay_get (overlay_vec[i], Qmouse_face); | |
22359 | if (!NILP (mouse_face)) | |
22360 | overlay = overlay_vec[i]; | |
22361 | } | |
22362 | ||
22363 | /* If we're actually highlighting the same overlay as | |
22364 | before, there's no need to do that again. */ | |
22365 | if (!NILP (overlay) | |
22366 | && EQ (overlay, dpyinfo->mouse_face_overlay)) | |
22367 | goto check_help_echo; | |
22368 | ||
22369 | dpyinfo->mouse_face_overlay = overlay; | |
22370 | ||
22371 | /* Clear the display of the old active region, if any. */ | |
22372 | if (clear_mouse_face (dpyinfo)) | |
22373 | cursor = No_Cursor; | |
22374 | ||
22375 | /* If no overlay applies, get a text property. */ | |
22376 | if (NILP (overlay)) | |
22377 | mouse_face = Fget_text_property (position, Qmouse_face, object); | |
22378 | ||
22379 | /* Handle the overlay case. */ | |
22380 | if (!NILP (overlay)) | |
22381 | { | |
22382 | /* Find the range of text around this char that | |
22383 | should be active. */ | |
22384 | Lisp_Object before, after; | |
22385 | int ignore; | |
22386 | ||
22387 | before = Foverlay_start (overlay); | |
22388 | after = Foverlay_end (overlay); | |
22389 | /* Record this as the current active region. */ | |
22390 | fast_find_position (w, XFASTINT (before), | |
22391 | &dpyinfo->mouse_face_beg_col, | |
22392 | &dpyinfo->mouse_face_beg_row, | |
22393 | &dpyinfo->mouse_face_beg_x, | |
22394 | &dpyinfo->mouse_face_beg_y, Qnil); | |
22395 | ||
22396 | dpyinfo->mouse_face_past_end | |
22397 | = !fast_find_position (w, XFASTINT (after), | |
22398 | &dpyinfo->mouse_face_end_col, | |
22399 | &dpyinfo->mouse_face_end_row, | |
22400 | &dpyinfo->mouse_face_end_x, | |
22401 | &dpyinfo->mouse_face_end_y, Qnil); | |
22402 | dpyinfo->mouse_face_window = window; | |
22403 | ||
22404 | dpyinfo->mouse_face_face_id | |
22405 | = face_at_buffer_position (w, pos, 0, 0, | |
22406 | &ignore, pos + 1, | |
22407 | !dpyinfo->mouse_face_hidden); | |
22408 | ||
22409 | /* Display it as active. */ | |
22410 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
22411 | cursor = No_Cursor; | |
22412 | } | |
22413 | /* Handle the text property case. */ | |
22414 | else if (!NILP (mouse_face) && BUFFERP (object)) | |
22415 | { | |
22416 | /* Find the range of text around this char that | |
22417 | should be active. */ | |
22418 | Lisp_Object before, after, beginning, end; | |
22419 | int ignore; | |
22420 | ||
22421 | beginning = Fmarker_position (w->start); | |
22422 | end = make_number (BUF_Z (XBUFFER (object)) | |
22423 | - XFASTINT (w->window_end_pos)); | |
22424 | before | |
22425 | = Fprevious_single_property_change (make_number (pos + 1), | |
22426 | Qmouse_face, | |
22427 | object, beginning); | |
22428 | after | |
22429 | = Fnext_single_property_change (position, Qmouse_face, | |
22430 | object, end); | |
22431 | ||
22432 | /* Record this as the current active region. */ | |
22433 | fast_find_position (w, XFASTINT (before), | |
22434 | &dpyinfo->mouse_face_beg_col, | |
22435 | &dpyinfo->mouse_face_beg_row, | |
22436 | &dpyinfo->mouse_face_beg_x, | |
22437 | &dpyinfo->mouse_face_beg_y, Qnil); | |
22438 | dpyinfo->mouse_face_past_end | |
22439 | = !fast_find_position (w, XFASTINT (after), | |
22440 | &dpyinfo->mouse_face_end_col, | |
22441 | &dpyinfo->mouse_face_end_row, | |
22442 | &dpyinfo->mouse_face_end_x, | |
22443 | &dpyinfo->mouse_face_end_y, Qnil); | |
22444 | dpyinfo->mouse_face_window = window; | |
22445 | ||
22446 | if (BUFFERP (object)) | |
22447 | dpyinfo->mouse_face_face_id | |
22448 | = face_at_buffer_position (w, pos, 0, 0, | |
22449 | &ignore, pos + 1, | |
22450 | !dpyinfo->mouse_face_hidden); | |
22451 | ||
22452 | /* Display it as active. */ | |
22453 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
22454 | cursor = No_Cursor; | |
22455 | } | |
22456 | else if (!NILP (mouse_face) && STRINGP (object)) | |
22457 | { | |
22458 | Lisp_Object b, e; | |
22459 | int ignore; | |
22460 | ||
22461 | b = Fprevious_single_property_change (make_number (pos + 1), | |
22462 | Qmouse_face, | |
22463 | object, Qnil); | |
22464 | e = Fnext_single_property_change (position, Qmouse_face, | |
22465 | object, Qnil); | |
22466 | if (NILP (b)) | |
22467 | b = make_number (0); | |
22468 | if (NILP (e)) | |
22469 | e = make_number (SCHARS (object) - 1); | |
55ce5058 | 22470 | |
fa3c6b4d KS |
22471 | fast_find_string_pos (w, XINT (b), object, |
22472 | &dpyinfo->mouse_face_beg_col, | |
22473 | &dpyinfo->mouse_face_beg_row, | |
22474 | &dpyinfo->mouse_face_beg_x, | |
22475 | &dpyinfo->mouse_face_beg_y, 0); | |
22476 | fast_find_string_pos (w, XINT (e), object, | |
22477 | &dpyinfo->mouse_face_end_col, | |
22478 | &dpyinfo->mouse_face_end_row, | |
22479 | &dpyinfo->mouse_face_end_x, | |
22480 | &dpyinfo->mouse_face_end_y, 1); | |
22481 | dpyinfo->mouse_face_past_end = 0; | |
22482 | dpyinfo->mouse_face_window = window; | |
22483 | dpyinfo->mouse_face_face_id | |
22484 | = face_at_string_position (w, object, pos, 0, 0, 0, &ignore, | |
22485 | glyph->face_id, 1); | |
22486 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
22487 | cursor = No_Cursor; | |
22488 | } | |
22489 | else if (STRINGP (object) && NILP (mouse_face)) | |
22490 | { | |
22491 | /* A string which doesn't have mouse-face, but | |
22492 | the text ``under'' it might have. */ | |
22493 | struct glyph_row *r = MATRIX_ROW (w->current_matrix, vpos); | |
22494 | int start = MATRIX_ROW_START_CHARPOS (r); | |
22495 | ||
22496 | pos = string_buffer_position (w, object, start); | |
22497 | if (pos > 0) | |
22498 | mouse_face = get_char_property_and_overlay (make_number (pos), | |
22499 | Qmouse_face, | |
22500 | w->buffer, | |
22501 | &overlay); | |
22502 | if (!NILP (mouse_face) && !NILP (overlay)) | |
22503 | { | |
22504 | Lisp_Object before = Foverlay_start (overlay); | |
22505 | Lisp_Object after = Foverlay_end (overlay); | |
22506 | int ignore; | |
22507 | ||
22508 | /* Note that we might not be able to find position | |
22509 | BEFORE in the glyph matrix if the overlay is | |
22510 | entirely covered by a `display' property. In | |
22511 | this case, we overshoot. So let's stop in | |
22512 | the glyph matrix before glyphs for OBJECT. */ | |
22513 | fast_find_position (w, XFASTINT (before), | |
22514 | &dpyinfo->mouse_face_beg_col, | |
22515 | &dpyinfo->mouse_face_beg_row, | |
22516 | &dpyinfo->mouse_face_beg_x, | |
22517 | &dpyinfo->mouse_face_beg_y, | |
22518 | object); | |
22519 | ||
22520 | dpyinfo->mouse_face_past_end | |
22521 | = !fast_find_position (w, XFASTINT (after), | |
22522 | &dpyinfo->mouse_face_end_col, | |
22523 | &dpyinfo->mouse_face_end_row, | |
22524 | &dpyinfo->mouse_face_end_x, | |
22525 | &dpyinfo->mouse_face_end_y, | |
22526 | Qnil); | |
22527 | dpyinfo->mouse_face_window = window; | |
22528 | dpyinfo->mouse_face_face_id | |
22529 | = face_at_buffer_position (w, pos, 0, 0, | |
22530 | &ignore, pos + 1, | |
22531 | !dpyinfo->mouse_face_hidden); | |
22532 | ||
22533 | /* Display it as active. */ | |
22534 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
22535 | cursor = No_Cursor; | |
22536 | } | |
22537 | } | |
22538 | } | |
22539 | ||
22540 | check_help_echo: | |
22541 | ||
22542 | /* Look for a `help-echo' property. */ | |
493fdc3c | 22543 | if (NILP (help_echo_string)) { |
fa3c6b4d KS |
22544 | Lisp_Object help, overlay; |
22545 | ||
22546 | /* Check overlays first. */ | |
22547 | help = overlay = Qnil; | |
22548 | for (i = noverlays - 1; i >= 0 && NILP (help); --i) | |
22549 | { | |
22550 | overlay = overlay_vec[i]; | |
22551 | help = Foverlay_get (overlay, Qhelp_echo); | |
22552 | } | |
22553 | ||
22554 | if (!NILP (help)) | |
22555 | { | |
22556 | help_echo_string = help; | |
22557 | help_echo_window = window; | |
22558 | help_echo_object = overlay; | |
22559 | help_echo_pos = pos; | |
22560 | } | |
22561 | else | |
22562 | { | |
22563 | Lisp_Object object = glyph->object; | |
22564 | int charpos = glyph->charpos; | |
22565 | ||
22566 | /* Try text properties. */ | |
22567 | if (STRINGP (object) | |
22568 | && charpos >= 0 | |
22569 | && charpos < SCHARS (object)) | |
22570 | { | |
22571 | help = Fget_text_property (make_number (charpos), | |
22572 | Qhelp_echo, object); | |
22573 | if (NILP (help)) | |
22574 | { | |
22575 | /* If the string itself doesn't specify a help-echo, | |
22576 | see if the buffer text ``under'' it does. */ | |
22577 | struct glyph_row *r | |
22578 | = MATRIX_ROW (w->current_matrix, vpos); | |
22579 | int start = MATRIX_ROW_START_CHARPOS (r); | |
22580 | int pos = string_buffer_position (w, object, start); | |
22581 | if (pos > 0) | |
22582 | { | |
22583 | help = Fget_char_property (make_number (pos), | |
22584 | Qhelp_echo, w->buffer); | |
22585 | if (!NILP (help)) | |
22586 | { | |
22587 | charpos = pos; | |
22588 | object = w->buffer; | |
22589 | } | |
22590 | } | |
22591 | } | |
22592 | } | |
22593 | else if (BUFFERP (object) | |
22594 | && charpos >= BEGV | |
22595 | && charpos < ZV) | |
22596 | help = Fget_text_property (make_number (charpos), Qhelp_echo, | |
22597 | object); | |
22598 | ||
22599 | if (!NILP (help)) | |
22600 | { | |
22601 | help_echo_string = help; | |
22602 | help_echo_window = window; | |
22603 | help_echo_object = object; | |
22604 | help_echo_pos = charpos; | |
22605 | } | |
22606 | } | |
22607 | } | |
22608 | ||
493fdc3c KS |
22609 | /* Look for a `pointer' property. */ |
22610 | if (NILP (pointer)) | |
22611 | { | |
22612 | /* Check overlays first. */ | |
22613 | for (i = noverlays - 1; i >= 0 && NILP (pointer); --i) | |
22614 | pointer = Foverlay_get (overlay_vec[i], Qpointer); | |
22615 | ||
22616 | if (NILP (pointer)) | |
22617 | { | |
22618 | Lisp_Object object = glyph->object; | |
22619 | int charpos = glyph->charpos; | |
22620 | ||
22621 | /* Try text properties. */ | |
22622 | if (STRINGP (object) | |
22623 | && charpos >= 0 | |
22624 | && charpos < SCHARS (object)) | |
22625 | { | |
22626 | pointer = Fget_text_property (make_number (charpos), | |
22627 | Qpointer, object); | |
22628 | if (NILP (pointer)) | |
22629 | { | |
22630 | /* If the string itself doesn't specify a pointer, | |
22631 | see if the buffer text ``under'' it does. */ | |
22632 | struct glyph_row *r | |
22633 | = MATRIX_ROW (w->current_matrix, vpos); | |
22634 | int start = MATRIX_ROW_START_CHARPOS (r); | |
22635 | int pos = string_buffer_position (w, object, start); | |
22636 | if (pos > 0) | |
22637 | pointer = Fget_char_property (make_number (pos), | |
22638 | Qpointer, w->buffer); | |
22639 | } | |
22640 | } | |
22641 | else if (BUFFERP (object) | |
22642 | && charpos >= BEGV | |
22643 | && charpos < ZV) | |
22644 | pointer = Fget_text_property (make_number (charpos), | |
22645 | Qpointer, object); | |
22646 | } | |
22647 | } | |
22648 | ||
fa3c6b4d KS |
22649 | BEGV = obegv; |
22650 | ZV = ozv; | |
22651 | current_buffer = obuf; | |
22652 | } | |
22653 | ||
22654 | set_cursor: | |
22655 | ||
493fdc3c | 22656 | define_frame_cursor1 (f, cursor, pointer); |
fa3c6b4d KS |
22657 | } |
22658 | ||
22659 | ||
22660 | /* EXPORT for RIF: | |
22661 | Clear any mouse-face on window W. This function is part of the | |
22662 | redisplay interface, and is called from try_window_id and similar | |
22663 | functions to ensure the mouse-highlight is off. */ | |
22664 | ||
22665 | void | |
22666 | x_clear_window_mouse_face (w) | |
22667 | struct window *w; | |
22668 | { | |
22669 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (XFRAME (w->frame)); | |
22670 | Lisp_Object window; | |
22671 | ||
22672 | BLOCK_INPUT; | |
22673 | XSETWINDOW (window, w); | |
22674 | if (EQ (window, dpyinfo->mouse_face_window)) | |
22675 | clear_mouse_face (dpyinfo); | |
22676 | UNBLOCK_INPUT; | |
22677 | } | |
22678 | ||
22679 | ||
22680 | /* EXPORT: | |
22681 | Just discard the mouse face information for frame F, if any. | |
22682 | This is used when the size of F is changed. */ | |
22683 | ||
22684 | void | |
22685 | cancel_mouse_face (f) | |
22686 | struct frame *f; | |
22687 | { | |
22688 | Lisp_Object window; | |
22689 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
22690 | ||
22691 | window = dpyinfo->mouse_face_window; | |
22692 | if (! NILP (window) && XFRAME (XWINDOW (window)->frame) == f) | |
22693 | { | |
22694 | dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1; | |
22695 | dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1; | |
22696 | dpyinfo->mouse_face_window = Qnil; | |
22697 | } | |
22698 | } | |
22699 | ||
22700 | ||
22701 | #endif /* HAVE_WINDOW_SYSTEM */ | |
22702 | ||
22703 | \f | |
22704 | /*********************************************************************** | |
22705 | Exposure Events | |
22706 | ***********************************************************************/ | |
22707 | ||
22708 | #ifdef HAVE_WINDOW_SYSTEM | |
22709 | ||
22710 | /* Redraw the part of glyph row area AREA of glyph row ROW on window W | |
22711 | which intersects rectangle R. R is in window-relative coordinates. */ | |
22712 | ||
22713 | static void | |
22714 | expose_area (w, row, r, area) | |
22715 | struct window *w; | |
22716 | struct glyph_row *row; | |
22717 | XRectangle *r; | |
22718 | enum glyph_row_area area; | |
22719 | { | |
22720 | struct glyph *first = row->glyphs[area]; | |
22721 | struct glyph *end = row->glyphs[area] + row->used[area]; | |
22722 | struct glyph *last; | |
22723 | int first_x, start_x, x; | |
22724 | ||
22725 | if (area == TEXT_AREA && row->fill_line_p) | |
22726 | /* If row extends face to end of line write the whole line. */ | |
22727 | draw_glyphs (w, 0, row, area, | |
22728 | 0, row->used[area], | |
22729 | DRAW_NORMAL_TEXT, 0); | |
22730 | else | |
22731 | { | |
22732 | /* Set START_X to the window-relative start position for drawing glyphs of | |
22733 | AREA. The first glyph of the text area can be partially visible. | |
22734 | The first glyphs of other areas cannot. */ | |
da8b7f4f | 22735 | start_x = window_box_left_offset (w, area); |
fa3c6b4d | 22736 | x = start_x; |
29b3ea63 KS |
22737 | if (area == TEXT_AREA) |
22738 | x += row->x; | |
fa3c6b4d KS |
22739 | |
22740 | /* Find the first glyph that must be redrawn. */ | |
22741 | while (first < end | |
22742 | && x + first->pixel_width < r->x) | |
22743 | { | |
22744 | x += first->pixel_width; | |
22745 | ++first; | |
22746 | } | |
22747 | ||
22748 | /* Find the last one. */ | |
22749 | last = first; | |
22750 | first_x = x; | |
22751 | while (last < end | |
22752 | && x < r->x + r->width) | |
22753 | { | |
22754 | x += last->pixel_width; | |
22755 | ++last; | |
22756 | } | |
22757 | ||
22758 | /* Repaint. */ | |
22759 | if (last > first) | |
22760 | draw_glyphs (w, first_x - start_x, row, area, | |
22761 | first - row->glyphs[area], last - row->glyphs[area], | |
22762 | DRAW_NORMAL_TEXT, 0); | |
22763 | } | |
22764 | } | |
22765 | ||
22766 | ||
22767 | /* Redraw the parts of the glyph row ROW on window W intersecting | |
22768 | rectangle R. R is in window-relative coordinates. Value is | |
22769 | non-zero if mouse-face was overwritten. */ | |
22770 | ||
22771 | static int | |
22772 | expose_line (w, row, r) | |
22773 | struct window *w; | |
22774 | struct glyph_row *row; | |
22775 | XRectangle *r; | |
22776 | { | |
22777 | xassert (row->enabled_p); | |
22778 | ||
22779 | if (row->mode_line_p || w->pseudo_window_p) | |
22780 | draw_glyphs (w, 0, row, TEXT_AREA, | |
22781 | 0, row->used[TEXT_AREA], | |
22782 | DRAW_NORMAL_TEXT, 0); | |
22783 | else | |
22784 | { | |
22785 | if (row->used[LEFT_MARGIN_AREA]) | |
22786 | expose_area (w, row, r, LEFT_MARGIN_AREA); | |
22787 | if (row->used[TEXT_AREA]) | |
22788 | expose_area (w, row, r, TEXT_AREA); | |
22789 | if (row->used[RIGHT_MARGIN_AREA]) | |
22790 | expose_area (w, row, r, RIGHT_MARGIN_AREA); | |
22791 | draw_row_fringe_bitmaps (w, row); | |
cfe03a41 KS |
22792 | } |
22793 | ||
fa3c6b4d KS |
22794 | return row->mouse_face_p; |
22795 | } | |
22796 | ||
22797 | ||
22798 | /* Redraw those parts of glyphs rows during expose event handling that | |
22799 | overlap other rows. Redrawing of an exposed line writes over parts | |
22800 | of lines overlapping that exposed line; this function fixes that. | |
22801 | ||
22802 | W is the window being exposed. FIRST_OVERLAPPING_ROW is the first | |
22803 | row in W's current matrix that is exposed and overlaps other rows. | |
22804 | LAST_OVERLAPPING_ROW is the last such row. */ | |
22805 | ||
22806 | static void | |
22807 | expose_overlaps (w, first_overlapping_row, last_overlapping_row) | |
22808 | struct window *w; | |
22809 | struct glyph_row *first_overlapping_row; | |
22810 | struct glyph_row *last_overlapping_row; | |
22811 | { | |
22812 | struct glyph_row *row; | |
22813 | ||
22814 | for (row = first_overlapping_row; row <= last_overlapping_row; ++row) | |
22815 | if (row->overlapping_p) | |
22816 | { | |
22817 | xassert (row->enabled_p && !row->mode_line_p); | |
22818 | ||
22819 | if (row->used[LEFT_MARGIN_AREA]) | |
a66678fd | 22820 | x_fix_overlapping_area (w, row, LEFT_MARGIN_AREA, OVERLAPS_BOTH); |
cfe03a41 | 22821 | |
fa3c6b4d | 22822 | if (row->used[TEXT_AREA]) |
a66678fd | 22823 | x_fix_overlapping_area (w, row, TEXT_AREA, OVERLAPS_BOTH); |
fa3c6b4d KS |
22824 | |
22825 | if (row->used[RIGHT_MARGIN_AREA]) | |
a66678fd | 22826 | x_fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, OVERLAPS_BOTH); |
fa3c6b4d KS |
22827 | } |
22828 | } | |
22829 | ||
22830 | ||
22831 | /* Return non-zero if W's cursor intersects rectangle R. */ | |
22832 | ||
22833 | static int | |
22834 | phys_cursor_in_rect_p (w, r) | |
22835 | struct window *w; | |
22836 | XRectangle *r; | |
22837 | { | |
22838 | XRectangle cr, result; | |
22839 | struct glyph *cursor_glyph; | |
22840 | ||
22841 | cursor_glyph = get_phys_cursor_glyph (w); | |
22842 | if (cursor_glyph) | |
cfe03a41 | 22843 | { |
be21b925 | 22844 | /* r is relative to W's box, but w->phys_cursor.x is relative |
aecf50d2 KS |
22845 | to left edge of W's TEXT area. Adjust it. */ |
22846 | cr.x = window_box_left_offset (w, TEXT_AREA) + w->phys_cursor.x; | |
fa3c6b4d KS |
22847 | cr.y = w->phys_cursor.y; |
22848 | cr.width = cursor_glyph->pixel_width; | |
22849 | cr.height = w->phys_cursor_height; | |
be21b925 | 22850 | /* ++KFS: W32 version used W32-specific IntersectRect here, but |
fa3c6b4d KS |
22851 | I assume the effect is the same -- and this is portable. */ |
22852 | return x_intersect_rectangles (&cr, r, &result); | |
cfe03a41 | 22853 | } |
fa3c6b4d KS |
22854 | else |
22855 | return 0; | |
22856 | } | |
cfe03a41 | 22857 | |
cfe03a41 | 22858 | |
fa3c6b4d KS |
22859 | /* EXPORT: |
22860 | Draw a vertical window border to the right of window W if W doesn't | |
22861 | have vertical scroll bars. */ | |
cfe03a41 | 22862 | |
cfe03a41 | 22863 | void |
fa3c6b4d KS |
22864 | x_draw_vertical_border (w) |
22865 | struct window *w; | |
cfe03a41 | 22866 | { |
da8b7f4f | 22867 | /* We could do better, if we knew what type of scroll-bar the adjacent |
be21b925 | 22868 | windows (on either side) have... But we don't :-( |
da8b7f4f KS |
22869 | However, I think this works ok. ++KFS 2003-04-25 */ |
22870 | ||
fa3c6b4d KS |
22871 | /* Redraw borders between horizontally adjacent windows. Don't |
22872 | do it for frames with vertical scroll bars because either the | |
22873 | right scroll bar of a window, or the left scroll bar of its | |
22874 | neighbor will suffice as a border. */ | |
b55d59ba KS |
22875 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (XFRAME (w->frame))) |
22876 | return; | |
22877 | ||
fa3c6b4d | 22878 | if (!WINDOW_RIGHTMOST_P (w) |
da8b7f4f | 22879 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_RIGHT (w)) |
fa3c6b4d KS |
22880 | { |
22881 | int x0, x1, y0, y1; | |
cfe03a41 | 22882 | |
fa3c6b4d | 22883 | window_box_edges (w, -1, &x0, &y0, &x1, &y1); |
fa3c6b4d | 22884 | y1 -= 1; |
cfe03a41 | 22885 | |
74fb229b JL |
22886 | if (WINDOW_LEFT_FRINGE_WIDTH (w) == 0) |
22887 | x1 -= 1; | |
22888 | ||
fa3c6b4d | 22889 | rif->draw_vertical_window_border (w, x1, y0, y1); |
cfe03a41 | 22890 | } |
da8b7f4f KS |
22891 | else if (!WINDOW_LEFTMOST_P (w) |
22892 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w)) | |
22893 | { | |
22894 | int x0, x1, y0, y1; | |
22895 | ||
22896 | window_box_edges (w, -1, &x0, &y0, &x1, &y1); | |
22897 | y1 -= 1; | |
22898 | ||
74fb229b JL |
22899 | if (WINDOW_LEFT_FRINGE_WIDTH (w) == 0) |
22900 | x0 -= 1; | |
22901 | ||
da8b7f4f KS |
22902 | rif->draw_vertical_window_border (w, x0, y0, y1); |
22903 | } | |
cfe03a41 KS |
22904 | } |
22905 | ||
22906 | ||
fa3c6b4d KS |
22907 | /* Redraw the part of window W intersection rectangle FR. Pixel |
22908 | coordinates in FR are frame-relative. Call this function with | |
22909 | input blocked. Value is non-zero if the exposure overwrites | |
22910 | mouse-face. */ | |
cfe03a41 | 22911 | |
fa3c6b4d KS |
22912 | static int |
22913 | expose_window (w, fr) | |
cfe03a41 | 22914 | struct window *w; |
fa3c6b4d | 22915 | XRectangle *fr; |
cfe03a41 KS |
22916 | { |
22917 | struct frame *f = XFRAME (w->frame); | |
fa3c6b4d KS |
22918 | XRectangle wr, r; |
22919 | int mouse_face_overwritten_p = 0; | |
22920 | ||
22921 | /* If window is not yet fully initialized, do nothing. This can | |
22922 | happen when toolkit scroll bars are used and a window is split. | |
22923 | Reconfiguring the scroll bar will generate an expose for a newly | |
22924 | created window. */ | |
22925 | if (w->current_matrix == NULL) | |
22926 | return 0; | |
cfe03a41 | 22927 | |
fa3c6b4d KS |
22928 | /* When we're currently updating the window, display and current |
22929 | matrix usually don't agree. Arrange for a thorough display | |
22930 | later. */ | |
22931 | if (w == updated_window) | |
22932 | { | |
22933 | SET_FRAME_GARBAGED (f); | |
22934 | return 0; | |
22935 | } | |
e9c99027 | 22936 | |
fa3c6b4d | 22937 | /* Frame-relative pixel rectangle of W. */ |
da8b7f4f KS |
22938 | wr.x = WINDOW_LEFT_EDGE_X (w); |
22939 | wr.y = WINDOW_TOP_EDGE_Y (w); | |
22940 | wr.width = WINDOW_TOTAL_WIDTH (w); | |
22941 | wr.height = WINDOW_TOTAL_HEIGHT (w); | |
fa3c6b4d KS |
22942 | |
22943 | if (x_intersect_rectangles (fr, &wr, &r)) | |
cfe03a41 | 22944 | { |
fa3c6b4d KS |
22945 | int yb = window_text_bottom_y (w); |
22946 | struct glyph_row *row; | |
22947 | int cursor_cleared_p; | |
22948 | struct glyph_row *first_overlapping_row, *last_overlapping_row; | |
22949 | ||
22950 | TRACE ((stderr, "expose_window (%d, %d, %d, %d)\n", | |
22951 | r.x, r.y, r.width, r.height)); | |
22952 | ||
22953 | /* Convert to window coordinates. */ | |
cc8549df KS |
22954 | r.x -= WINDOW_LEFT_EDGE_X (w); |
22955 | r.y -= WINDOW_TOP_EDGE_Y (w); | |
fa3c6b4d KS |
22956 | |
22957 | /* Turn off the cursor. */ | |
22958 | if (!w->pseudo_window_p | |
22959 | && phys_cursor_in_rect_p (w, &r)) | |
cfe03a41 | 22960 | { |
fa3c6b4d KS |
22961 | x_clear_cursor (w); |
22962 | cursor_cleared_p = 1; | |
cfe03a41 | 22963 | } |
fa3c6b4d KS |
22964 | else |
22965 | cursor_cleared_p = 0; | |
cfe03a41 | 22966 | |
fa3c6b4d KS |
22967 | /* Update lines intersecting rectangle R. */ |
22968 | first_overlapping_row = last_overlapping_row = NULL; | |
22969 | for (row = w->current_matrix->rows; | |
22970 | row->enabled_p; | |
22971 | ++row) | |
22972 | { | |
22973 | int y0 = row->y; | |
22974 | int y1 = MATRIX_ROW_BOTTOM_Y (row); | |
cfe03a41 | 22975 | |
fa3c6b4d KS |
22976 | if ((y0 >= r.y && y0 < r.y + r.height) |
22977 | || (y1 > r.y && y1 < r.y + r.height) | |
22978 | || (r.y >= y0 && r.y < y1) | |
22979 | || (r.y + r.height > y0 && r.y + r.height < y1)) | |
22980 | { | |
83e2a07a KS |
22981 | /* A header line may be overlapping, but there is no need |
22982 | to fix overlapping areas for them. KFS 2005-02-12 */ | |
22983 | if (row->overlapping_p && !row->mode_line_p) | |
fa3c6b4d KS |
22984 | { |
22985 | if (first_overlapping_row == NULL) | |
22986 | first_overlapping_row = row; | |
22987 | last_overlapping_row = row; | |
22988 | } | |
e9c99027 | 22989 | |
fa3c6b4d KS |
22990 | if (expose_line (w, row, &r)) |
22991 | mouse_face_overwritten_p = 1; | |
22992 | } | |
cfe03a41 | 22993 | |
fa3c6b4d KS |
22994 | if (y1 >= yb) |
22995 | break; | |
22996 | } | |
cfe03a41 | 22997 | |
fa3c6b4d KS |
22998 | /* Display the mode line if there is one. */ |
22999 | if (WINDOW_WANTS_MODELINE_P (w) | |
23000 | && (row = MATRIX_MODE_LINE_ROW (w->current_matrix), | |
23001 | row->enabled_p) | |
23002 | && row->y < r.y + r.height) | |
23003 | { | |
23004 | if (expose_line (w, row, &r)) | |
23005 | mouse_face_overwritten_p = 1; | |
23006 | } | |
cfe03a41 | 23007 | |
fa3c6b4d KS |
23008 | if (!w->pseudo_window_p) |
23009 | { | |
23010 | /* Fix the display of overlapping rows. */ | |
23011 | if (first_overlapping_row) | |
23012 | expose_overlaps (w, first_overlapping_row, last_overlapping_row); | |
23013 | ||
23014 | /* Draw border between windows. */ | |
23015 | x_draw_vertical_border (w); | |
23016 | ||
23017 | /* Turn the cursor on again. */ | |
23018 | if (cursor_cleared_p) | |
23019 | update_window_cursor (w, 1); | |
23020 | } | |
23021 | } | |
23022 | ||
fa3c6b4d KS |
23023 | return mouse_face_overwritten_p; |
23024 | } | |
23025 | ||
23026 | ||
23027 | ||
23028 | /* Redraw (parts) of all windows in the window tree rooted at W that | |
23029 | intersect R. R contains frame pixel coordinates. Value is | |
23030 | non-zero if the exposure overwrites mouse-face. */ | |
23031 | ||
23032 | static int | |
23033 | expose_window_tree (w, r) | |
23034 | struct window *w; | |
23035 | XRectangle *r; | |
23036 | { | |
23037 | struct frame *f = XFRAME (w->frame); | |
23038 | int mouse_face_overwritten_p = 0; | |
23039 | ||
23040 | while (w && !FRAME_GARBAGED_P (f)) | |
cfe03a41 | 23041 | { |
fa3c6b4d KS |
23042 | if (!NILP (w->hchild)) |
23043 | mouse_face_overwritten_p | |
23044 | |= expose_window_tree (XWINDOW (w->hchild), r); | |
23045 | else if (!NILP (w->vchild)) | |
23046 | mouse_face_overwritten_p | |
23047 | |= expose_window_tree (XWINDOW (w->vchild), r); | |
23048 | else | |
23049 | mouse_face_overwritten_p |= expose_window (w, r); | |
23050 | ||
23051 | w = NILP (w->next) ? NULL : XWINDOW (w->next); | |
cfe03a41 | 23052 | } |
cfe03a41 | 23053 | |
fa3c6b4d KS |
23054 | return mouse_face_overwritten_p; |
23055 | } | |
cfe03a41 | 23056 | |
cfe03a41 | 23057 | |
fa3c6b4d KS |
23058 | /* EXPORT: |
23059 | Redisplay an exposed area of frame F. X and Y are the upper-left | |
23060 | corner of the exposed rectangle. W and H are width and height of | |
23061 | the exposed area. All are pixel values. W or H zero means redraw | |
23062 | the entire frame. */ | |
cfe03a41 | 23063 | |
fa3c6b4d KS |
23064 | void |
23065 | expose_frame (f, x, y, w, h) | |
23066 | struct frame *f; | |
23067 | int x, y, w, h; | |
23068 | { | |
23069 | XRectangle r; | |
23070 | int mouse_face_overwritten_p = 0; | |
23071 | ||
23072 | TRACE ((stderr, "expose_frame ")); | |
23073 | ||
23074 | /* No need to redraw if frame will be redrawn soon. */ | |
23075 | if (FRAME_GARBAGED_P (f)) | |
cfe03a41 | 23076 | { |
fa3c6b4d KS |
23077 | TRACE ((stderr, " garbaged\n")); |
23078 | return; | |
cfe03a41 | 23079 | } |
7d0393cf | 23080 | |
fa3c6b4d KS |
23081 | /* If basic faces haven't been realized yet, there is no point in |
23082 | trying to redraw anything. This can happen when we get an expose | |
23083 | event while Emacs is starting, e.g. by moving another window. */ | |
23084 | if (FRAME_FACE_CACHE (f) == NULL | |
23085 | || FRAME_FACE_CACHE (f)->used < BASIC_FACE_ID_SENTINEL) | |
23086 | { | |
23087 | TRACE ((stderr, " no faces\n")); | |
23088 | return; | |
23089 | } | |
cfe03a41 | 23090 | |
fa3c6b4d | 23091 | if (w == 0 || h == 0) |
cfe03a41 | 23092 | { |
fa3c6b4d | 23093 | r.x = r.y = 0; |
da8b7f4f KS |
23094 | r.width = FRAME_COLUMN_WIDTH (f) * FRAME_COLS (f); |
23095 | r.height = FRAME_LINE_HEIGHT (f) * FRAME_LINES (f); | |
fa3c6b4d KS |
23096 | } |
23097 | else | |
23098 | { | |
23099 | r.x = x; | |
23100 | r.y = y; | |
23101 | r.width = w; | |
23102 | r.height = h; | |
cfe03a41 KS |
23103 | } |
23104 | ||
fa3c6b4d KS |
23105 | TRACE ((stderr, "(%d, %d, %d, %d)\n", r.x, r.y, r.width, r.height)); |
23106 | mouse_face_overwritten_p = expose_window_tree (XWINDOW (f->root_window), &r); | |
23107 | ||
23108 | if (WINDOWP (f->tool_bar_window)) | |
23109 | mouse_face_overwritten_p | |
23110 | |= expose_window (XWINDOW (f->tool_bar_window), &r); | |
23111 | ||
23112 | #ifdef HAVE_X_WINDOWS | |
23113 | #ifndef MSDOS | |
23114 | #ifndef USE_X_TOOLKIT | |
23115 | if (WINDOWP (f->menu_bar_window)) | |
23116 | mouse_face_overwritten_p | |
23117 | |= expose_window (XWINDOW (f->menu_bar_window), &r); | |
23118 | #endif /* not USE_X_TOOLKIT */ | |
23119 | #endif | |
23120 | #endif | |
23121 | ||
23122 | /* Some window managers support a focus-follows-mouse style with | |
23123 | delayed raising of frames. Imagine a partially obscured frame, | |
23124 | and moving the mouse into partially obscured mouse-face on that | |
23125 | frame. The visible part of the mouse-face will be highlighted, | |
23126 | then the WM raises the obscured frame. With at least one WM, KDE | |
23127 | 2.1, Emacs is not getting any event for the raising of the frame | |
23128 | (even tried with SubstructureRedirectMask), only Expose events. | |
23129 | These expose events will draw text normally, i.e. not | |
23130 | highlighted. Which means we must redo the highlight here. | |
23131 | Subsume it under ``we love X''. --gerd 2001-08-15 */ | |
23132 | /* Included in Windows version because Windows most likely does not | |
23133 | do the right thing if any third party tool offers | |
23134 | focus-follows-mouse with delayed raise. --jason 2001-10-12 */ | |
23135 | if (mouse_face_overwritten_p && !FRAME_GARBAGED_P (f)) | |
23136 | { | |
23137 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
23138 | if (f == dpyinfo->mouse_face_mouse_frame) | |
23139 | { | |
23140 | int x = dpyinfo->mouse_face_mouse_x; | |
23141 | int y = dpyinfo->mouse_face_mouse_y; | |
23142 | clear_mouse_face (dpyinfo); | |
23143 | note_mouse_highlight (f, x, y); | |
23144 | } | |
23145 | } | |
cfe03a41 KS |
23146 | } |
23147 | ||
133c764e | 23148 | |
fa3c6b4d KS |
23149 | /* EXPORT: |
23150 | Determine the intersection of two rectangles R1 and R2. Return | |
23151 | the intersection in *RESULT. Value is non-zero if RESULT is not | |
23152 | empty. */ | |
133c764e | 23153 | |
fa3c6b4d KS |
23154 | int |
23155 | x_intersect_rectangles (r1, r2, result) | |
23156 | XRectangle *r1, *r2, *result; | |
133c764e | 23157 | { |
fa3c6b4d KS |
23158 | XRectangle *left, *right; |
23159 | XRectangle *upper, *lower; | |
23160 | int intersection_p = 0; | |
23161 | ||
23162 | /* Rearrange so that R1 is the left-most rectangle. */ | |
23163 | if (r1->x < r2->x) | |
23164 | left = r1, right = r2; | |
23165 | else | |
23166 | left = r2, right = r1; | |
23167 | ||
23168 | /* X0 of the intersection is right.x0, if this is inside R1, | |
23169 | otherwise there is no intersection. */ | |
23170 | if (right->x <= left->x + left->width) | |
133c764e | 23171 | { |
fa3c6b4d | 23172 | result->x = right->x; |
133c764e | 23173 | |
fa3c6b4d KS |
23174 | /* The right end of the intersection is the minimum of the |
23175 | the right ends of left and right. */ | |
23176 | result->width = (min (left->x + left->width, right->x + right->width) | |
23177 | - result->x); | |
133c764e | 23178 | |
fa3c6b4d KS |
23179 | /* Same game for Y. */ |
23180 | if (r1->y < r2->y) | |
23181 | upper = r1, lower = r2; | |
23182 | else | |
23183 | upper = r2, lower = r1; | |
133c764e | 23184 | |
fa3c6b4d KS |
23185 | /* The upper end of the intersection is lower.y0, if this is inside |
23186 | of upper. Otherwise, there is no intersection. */ | |
23187 | if (lower->y <= upper->y + upper->height) | |
23188 | { | |
23189 | result->y = lower->y; | |
23190 | ||
23191 | /* The lower end of the intersection is the minimum of the lower | |
23192 | ends of upper and lower. */ | |
23193 | result->height = (min (lower->y + lower->height, | |
23194 | upper->y + upper->height) | |
23195 | - result->y); | |
23196 | intersection_p = 1; | |
133c764e KS |
23197 | } |
23198 | } | |
fa3c6b4d KS |
23199 | |
23200 | return intersection_p; | |
133c764e KS |
23201 | } |
23202 | ||
fa3c6b4d KS |
23203 | #endif /* HAVE_WINDOW_SYSTEM */ |
23204 | ||
cfe03a41 | 23205 | \f |
5f5c8ee5 GM |
23206 | /*********************************************************************** |
23207 | Initialization | |
23208 | ***********************************************************************/ | |
23209 | ||
a2889657 JB |
23210 | void |
23211 | syms_of_xdisp () | |
23212 | { | |
c6e89d6c GM |
23213 | Vwith_echo_area_save_vector = Qnil; |
23214 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 23215 | |
c6e89d6c GM |
23216 | Vmessage_stack = Qnil; |
23217 | staticpro (&Vmessage_stack); | |
2311178e | 23218 | |
735c094c | 23219 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 23220 | staticpro (&Qinhibit_redisplay); |
735c094c | 23221 | |
b14bc55e RS |
23222 | message_dolog_marker1 = Fmake_marker (); |
23223 | staticpro (&message_dolog_marker1); | |
23224 | message_dolog_marker2 = Fmake_marker (); | |
23225 | staticpro (&message_dolog_marker2); | |
23226 | message_dolog_marker3 = Fmake_marker (); | |
23227 | staticpro (&message_dolog_marker3); | |
23228 | ||
5f5c8ee5 | 23229 | #if GLYPH_DEBUG |
7d4cc828 | 23230 | defsubr (&Sdump_frame_glyph_matrix); |
5f5c8ee5 GM |
23231 | defsubr (&Sdump_glyph_matrix); |
23232 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 23233 | defsubr (&Sdump_tool_bar_row); |
62397849 | 23234 | defsubr (&Strace_redisplay); |
bf9249e3 | 23235 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 23236 | #endif |
99a5de87 | 23237 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 23238 | defsubr (&Stool_bar_lines_needed); |
493fdc3c | 23239 | defsubr (&Slookup_image_map); |
99a5de87 | 23240 | #endif |
8143e6ab | 23241 | defsubr (&Sformat_mode_line); |
5f5c8ee5 | 23242 | |
cf074754 RS |
23243 | staticpro (&Qmenu_bar_update_hook); |
23244 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
23245 | ||
d46fb96a | 23246 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 23247 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 23248 | |
399164b4 KH |
23249 | staticpro (&Qoverriding_local_map); |
23250 | Qoverriding_local_map = intern ("overriding-local-map"); | |
23251 | ||
75c43375 RS |
23252 | staticpro (&Qwindow_scroll_functions); |
23253 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
23254 | ||
e0bfbde6 RS |
23255 | staticpro (&Qredisplay_end_trigger_functions); |
23256 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
2311178e | 23257 | |
2e54982e RS |
23258 | staticpro (&Qinhibit_point_motion_hooks); |
23259 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
23260 | ||
9499d71b GM |
23261 | QCdata = intern (":data"); |
23262 | staticpro (&QCdata); | |
5f5c8ee5 | 23263 | Qdisplay = intern ("display"); |
f3751a65 | 23264 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
23265 | Qspace_width = intern ("space-width"); |
23266 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
23267 | Qraise = intern ("raise"); |
23268 | staticpro (&Qraise); | |
e893970b KS |
23269 | Qslice = intern ("slice"); |
23270 | staticpro (&Qslice); | |
5f5c8ee5 GM |
23271 | Qspace = intern ("space"); |
23272 | staticpro (&Qspace); | |
f3751a65 GM |
23273 | Qmargin = intern ("margin"); |
23274 | staticpro (&Qmargin); | |
493fdc3c KS |
23275 | Qpointer = intern ("pointer"); |
23276 | staticpro (&Qpointer); | |
5f5c8ee5 | 23277 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 23278 | staticpro (&Qleft_margin); |
5f5c8ee5 | 23279 | Qright_margin = intern ("right-margin"); |
f3751a65 | 23280 | staticpro (&Qright_margin); |
da06e4d7 KS |
23281 | Qcenter = intern ("center"); |
23282 | staticpro (&Qcenter); | |
4933c603 KS |
23283 | Qline_height = intern ("line-height"); |
23284 | staticpro (&Qline_height); | |
5f5c8ee5 GM |
23285 | QCalign_to = intern (":align-to"); |
23286 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
23287 | QCrelative_width = intern (":relative-width"); |
23288 | staticpro (&QCrelative_width); | |
23289 | QCrelative_height = intern (":relative-height"); | |
23290 | staticpro (&QCrelative_height); | |
23291 | QCeval = intern (":eval"); | |
23292 | staticpro (&QCeval); | |
0fcf414f RS |
23293 | QCpropertize = intern (":propertize"); |
23294 | staticpro (&QCpropertize); | |
886bd6f2 GM |
23295 | QCfile = intern (":file"); |
23296 | staticpro (&QCfile); | |
5f5c8ee5 GM |
23297 | Qfontified = intern ("fontified"); |
23298 | staticpro (&Qfontified); | |
23299 | Qfontification_functions = intern ("fontification-functions"); | |
23300 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
23301 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
23302 | staticpro (&Qtrailing_whitespace); | |
30374745 RS |
23303 | Qescape_glyph = intern ("escape-glyph"); |
23304 | staticpro (&Qescape_glyph); | |
9c69e6e1 RS |
23305 | Qnobreak_space = intern ("nobreak-space"); |
23306 | staticpro (&Qnobreak_space); | |
5f5c8ee5 GM |
23307 | Qimage = intern ("image"); |
23308 | staticpro (&Qimage); | |
493fdc3c KS |
23309 | QCmap = intern (":map"); |
23310 | staticpro (&QCmap); | |
23311 | QCpointer = intern (":pointer"); | |
23312 | staticpro (&QCpointer); | |
23313 | Qrect = intern ("rect"); | |
23314 | staticpro (&Qrect); | |
23315 | Qcircle = intern ("circle"); | |
23316 | staticpro (&Qcircle); | |
23317 | Qpoly = intern ("poly"); | |
23318 | staticpro (&Qpoly); | |
ad4f174e GM |
23319 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
23320 | staticpro (&Qmessage_truncate_lines); | |
6422c1d7 GM |
23321 | Qgrow_only = intern ("grow-only"); |
23322 | staticpro (&Qgrow_only); | |
e1477f43 GM |
23323 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
23324 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
23325 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
23326 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
23327 | Qposition = intern ("position"); |
23328 | staticpro (&Qposition); | |
23329 | Qbuffer_position = intern ("buffer-position"); | |
23330 | staticpro (&Qbuffer_position); | |
23331 | Qobject = intern ("object"); | |
23332 | staticpro (&Qobject); | |
cfe03a41 KS |
23333 | Qbar = intern ("bar"); |
23334 | staticpro (&Qbar); | |
23335 | Qhbar = intern ("hbar"); | |
23336 | staticpro (&Qhbar); | |
23337 | Qbox = intern ("box"); | |
23338 | staticpro (&Qbox); | |
23339 | Qhollow = intern ("hollow"); | |
23340 | staticpro (&Qhollow); | |
493fdc3c KS |
23341 | Qhand = intern ("hand"); |
23342 | staticpro (&Qhand); | |
23343 | Qarrow = intern ("arrow"); | |
23344 | staticpro (&Qarrow); | |
23345 | Qtext = intern ("text"); | |
23346 | staticpro (&Qtext); | |
c53a1624 RS |
23347 | Qrisky_local_variable = intern ("risky-local-variable"); |
23348 | staticpro (&Qrisky_local_variable); | |
26683087 RS |
23349 | Qinhibit_free_realized_faces = intern ("inhibit-free-realized-faces"); |
23350 | staticpro (&Qinhibit_free_realized_faces); | |
5f5c8ee5 | 23351 | |
be21b925 KS |
23352 | list_of_error = Fcons (Fcons (intern ("error"), |
23353 | Fcons (intern ("void-variable"), Qnil)), | |
23354 | Qnil); | |
7033d6df RS |
23355 | staticpro (&list_of_error); |
23356 | ||
351b5434 KS |
23357 | Qlast_arrow_position = intern ("last-arrow-position"); |
23358 | staticpro (&Qlast_arrow_position); | |
23359 | Qlast_arrow_string = intern ("last-arrow-string"); | |
23360 | staticpro (&Qlast_arrow_string); | |
23361 | ||
23362 | Qoverlay_arrow_string = intern ("overlay-arrow-string"); | |
23363 | staticpro (&Qoverlay_arrow_string); | |
23364 | Qoverlay_arrow_bitmap = intern ("overlay-arrow-bitmap"); | |
23365 | staticpro (&Qoverlay_arrow_bitmap); | |
2311178e | 23366 | |
c6e89d6c GM |
23367 | echo_buffer[0] = echo_buffer[1] = Qnil; |
23368 | staticpro (&echo_buffer[0]); | |
23369 | staticpro (&echo_buffer[1]); | |
23370 | ||
23371 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
23372 | staticpro (&echo_area_buffer[0]); | |
23373 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 23374 | |
6a94510a GM |
23375 | Vmessages_buffer_name = build_string ("*Messages*"); |
23376 | staticpro (&Vmessages_buffer_name); | |
0fcf414f RS |
23377 | |
23378 | mode_line_proptrans_alist = Qnil; | |
23379 | staticpro (&mode_line_proptrans_alist); | |
fec8f23e KS |
23380 | mode_line_string_list = Qnil; |
23381 | staticpro (&mode_line_string_list); | |
4c0e4b80 KS |
23382 | mode_line_string_face = Qnil; |
23383 | staticpro (&mode_line_string_face); | |
23384 | mode_line_string_face_prop = Qnil; | |
23385 | staticpro (&mode_line_string_face_prop); | |
23386 | Vmode_line_unwind_vector = Qnil; | |
23387 | staticpro (&Vmode_line_unwind_vector); | |
fec8f23e | 23388 | |
fa3c6b4d KS |
23389 | help_echo_string = Qnil; |
23390 | staticpro (&help_echo_string); | |
23391 | help_echo_object = Qnil; | |
23392 | staticpro (&help_echo_object); | |
23393 | help_echo_window = Qnil; | |
23394 | staticpro (&help_echo_window); | |
23395 | previous_help_echo_string = Qnil; | |
23396 | staticpro (&previous_help_echo_string); | |
23397 | help_echo_pos = -1; | |
23398 | ||
23399 | #ifdef HAVE_WINDOW_SYSTEM | |
23400 | DEFVAR_BOOL ("x-stretch-cursor", &x_stretch_cursor_p, | |
23401 | doc: /* *Non-nil means draw block cursor as wide as the glyph under it. | |
23402 | For example, if a block cursor is over a tab, it will be drawn as | |
23403 | wide as that tab on the display. */); | |
23404 | x_stretch_cursor_p = 0; | |
23405 | #endif | |
23406 | ||
7ee72033 | 23407 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
88e6b646 | 23408 | doc: /* *Non-nil means highlight trailing whitespace. |
228299fa | 23409 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
23410 | Vshow_trailing_whitespace = Qnil; |
23411 | ||
9c69e6e1 RS |
23412 | DEFVAR_LISP ("nobreak-char-display", &Vnobreak_char_display, |
23413 | doc: /* *Control highlighting of nobreak space and soft hyphen. | |
0afd0871 JB |
23414 | A value of t means highlight the character itself (for nobreak space, |
23415 | use face `nobreak-space'). | |
23416 | A value of nil means no highlighting. | |
23417 | Other values mean display the escape glyph followed by an ordinary | |
9c69e6e1 RS |
23418 | space or ordinary hyphen. */); |
23419 | Vnobreak_char_display = Qt; | |
fe1c2006 | 23420 | |
493fdc3c | 23421 | DEFVAR_LISP ("void-text-area-pointer", &Vvoid_text_area_pointer, |
88e6b646 | 23422 | doc: /* *The pointer shape to show in void text areas. |
0afd0871 JB |
23423 | A value of nil means to show the text pointer. Other options are `arrow', |
23424 | `text', `hand', `vdrag', `hdrag', `modeline', and `hourglass'. */); | |
493fdc3c | 23425 | Vvoid_text_area_pointer = Qarrow; |
f65536fa | 23426 | |
7ee72033 MB |
23427 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
23428 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 23429 | This is used for internal purposes. */); |
735c094c KH |
23430 | Vinhibit_redisplay = Qnil; |
23431 | ||
7ee72033 MB |
23432 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
23433 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
23434 | Vglobal_mode_string = Qnil; |
23435 | ||
7ee72033 MB |
23436 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
23437 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
23438 | This must be the beginning of a line in order to work. |
23439 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
23440 | Voverlay_arrow_position = Qnil; |
23441 | ||
7ee72033 | 23442 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
351b5434 KS |
23443 | doc: /* String to display as an arrow in non-window frames. |
23444 | See also `overlay-arrow-position'. */); | |
5b487988 | 23445 | Voverlay_arrow_string = build_string ("=>"); |
a2889657 | 23446 | |
351b5434 KS |
23447 | DEFVAR_LISP ("overlay-arrow-variable-list", &Voverlay_arrow_variable_list, |
23448 | doc: /* List of variables (symbols) which hold markers for overlay arrows. | |
23449 | The symbols on this list are examined during redisplay to determine | |
23450 | where to display overlay arrows. */); | |
23451 | Voverlay_arrow_variable_list | |
23452 | = Fcons (intern ("overlay-arrow-position"), Qnil); | |
23453 | ||
7ee72033 MB |
23454 | DEFVAR_INT ("scroll-step", &scroll_step, |
23455 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
23456 | If that fails to bring point back on frame, point is centered instead. |
23457 | If this is zero, point is always centered after it moves off frame. | |
23458 | If you want scrolling to always be a line at a time, you should set | |
23459 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
23460 | ||
7ee72033 MB |
23461 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
23462 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
23463 | A value of zero means to scroll the text to center point vertically |
23464 | in the window. */); | |
0789adb2 RS |
23465 | scroll_conservatively = 0; |
23466 | ||
7ee72033 MB |
23467 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
23468 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
23469 | Recenter the window whenever point gets within this many lines |
23470 | of the top or bottom of the window. */); | |
9afd2168 RS |
23471 | scroll_margin = 0; |
23472 | ||
f65536fa | 23473 | DEFVAR_LISP ("display-pixels-per-inch", &Vdisplay_pixels_per_inch, |
c0d7caba | 23474 | doc: /* Pixels per inch value for non-window system displays. |
f65536fa KS |
23475 | Value is a number or a cons (WIDTH-DPI . HEIGHT-DPI). */); |
23476 | Vdisplay_pixels_per_inch = make_float (72.0); | |
23477 | ||
5f5c8ee5 | 23478 | #if GLYPH_DEBUG |
7ee72033 | 23479 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 23480 | #endif |
a2889657 JB |
23481 | |
23482 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
23483 | &truncate_partial_width_windows, |
23484 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
23485 | truncate_partial_width_windows = 1; |
23486 | ||
7ee72033 MB |
23487 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
23488 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa | 23489 | Any other value means to use the appropriate face, `mode-line', |
ccfe8f57 | 23490 | `header-line', or `menu' respectively. */); |
1862a24e | 23491 | mode_line_inverse_video = 1; |
aa6d10fa | 23492 | |
7ee72033 MB |
23493 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
23494 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
23495 | If the buffer is bigger than this, the line number does not appear |
23496 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 23497 | Vline_number_display_limit = Qnil; |
fba9ce76 | 23498 | |
090703f4 | 23499 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
23500 | &line_number_display_limit_width, |
23501 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
23502 | If the average length of the lines near point is bigger than this, then the |
23503 | line number may be omitted from the mode line. */); | |
5d121aec KH |
23504 | line_number_display_limit_width = 200; |
23505 | ||
7ee72033 MB |
23506 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
23507 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 23508 | highlight_nonselected_windows = 0; |
d39b6696 | 23509 | |
7ee72033 MB |
23510 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
23511 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
23512 | Minibuffer-only frames don't count, but iconified frames do. |
23513 | This variable is not guaranteed to be accurate except while processing | |
23514 | `frame-title-format' and `icon-title-format'. */); | |
23515 | ||
7ee72033 MB |
23516 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
23517 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
23518 | \(Assuming the window manager supports this feature.) |
23519 | This variable has the same structure as `mode-line-format' (which see), | |
23520 | and is used only on frames for which no explicit name has been set | |
23521 | \(see `modify-frame-parameters'). */); | |
f65536fa | 23522 | |
7ee72033 MB |
23523 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
23524 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
23525 | \(Assuming the window manager supports this feature.) |
23526 | This variable has the same structure as `mode-line-format' (which see), | |
23527 | and is used only on frames for which no explicit name has been set | |
23528 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
23529 | Vicon_title_format |
23530 | = Vframe_title_format | |
23531 | = Fcons (intern ("multiple-frames"), | |
23532 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 23533 | Fcons (Fcons (empty_string, |
d39b6696 KH |
23534 | Fcons (intern ("invocation-name"), |
23535 | Fcons (build_string ("@"), | |
23536 | Fcons (intern ("system-name"), | |
23537 | Qnil)))), | |
23538 | Qnil))); | |
5992c4f7 | 23539 | |
7ee72033 MB |
23540 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
23541 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
23542 | If nil, disable message logging. If t, log messages but don't truncate |
23543 | the buffer when it becomes large. */); | |
ac90c44f | 23544 | Vmessage_log_max = make_number (50); |
08b610e4 | 23545 | |
7ee72033 MB |
23546 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
23547 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
23548 | The value should be a list of functions that take one argument. |
23549 | Just before redisplay, for each frame, if any of its windows have changed | |
23550 | size since the last redisplay, or have been split or deleted, | |
23551 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 23552 | Vwindow_size_change_functions = Qnil; |
75c43375 | 23553 | |
7ee72033 | 23554 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
4b9da0fb | 23555 | doc: /* List of functions to call before redisplaying a window with scrolling. |
228299fa GM |
23556 | Each function is called with two arguments, the window |
23557 | and its new display-start position. Note that the value of `window-end' | |
23558 | is not valid when these functions are called. */); | |
75c43375 | 23559 | Vwindow_scroll_functions = Qnil; |
2311178e | 23560 | |
e2b64074 JB |
23561 | DEFVAR_LISP ("redisplay-end-trigger-functions", &Vredisplay_end_trigger_functions, |
23562 | doc: /* Functions called when redisplay of a window reaches the end trigger. | |
23563 | Each function is called with two arguments, the window and the end trigger value. | |
23564 | See `set-window-redisplay-end-trigger'. */); | |
23565 | Vredisplay_end_trigger_functions = Qnil; | |
23566 | ||
fa3c6b4d KS |
23567 | DEFVAR_BOOL ("mouse-autoselect-window", &mouse_autoselect_window, |
23568 | doc: /* *Non-nil means autoselect window with mouse pointer. */); | |
23569 | mouse_autoselect_window = 0; | |
23570 | ||
7ee72033 MB |
23571 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
23572 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
23573 | This increases a tool-bar's height if not all tool-bar items are visible. |
23574 | It decreases a tool-bar's height when it would display blank lines | |
23575 | otherwise. */); | |
e037b9ec | 23576 | auto_resize_tool_bars_p = 1; |
2311178e | 23577 | |
7ee72033 MB |
23578 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
23579 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 23580 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 23581 | |
8232c913 KS |
23582 | DEFVAR_BOOL ("make-cursor-line-fully-visible", &make_cursor_line_fully_visible_p, |
23583 | doc: /* *Non-nil means to scroll (recenter) cursor line if it is not fully visible. */); | |
23584 | make_cursor_line_fully_visible_p = 1; | |
23585 | ||
7ee72033 MB |
23586 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
23587 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa | 23588 | If an integer, use that for both horizontal and vertical margins. |
f6c89f27 | 23589 | Otherwise, value should be a pair of integers `(HORZ . VERT)' with |
228299fa GM |
23590 | HORZ specifying the horizontal margin, and VERT specifying the |
23591 | vertical margin. */); | |
c3d76173 | 23592 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 23593 | |
7ee72033 | 23594 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
6da3c85b | 23595 | doc: /* *Relief thickness of tool-bar buttons. */); |
c3d76173 | 23596 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 23597 | |
7ee72033 MB |
23598 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
23599 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
23600 | Each function is called with one argument POS. Functions must |
23601 | fontify a region starting at POS in the current buffer, and give | |
23602 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 23603 | Vfontification_functions = Qnil; |
6b9f0906 | 23604 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
23605 | |
23606 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
23607 | &unibyte_display_via_language_environment, |
23608 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
23609 | Specifically this means that unibyte non-ASCII characters |
23610 | are displayed by converting them to the equivalent multibyte characters | |
23611 | according to the current language environment. As a result, they are | |
23612 | displayed according to the current fontset. */); | |
7bbe686f | 23613 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 23614 | |
7ee72033 MB |
23615 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
23616 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
23617 | If a float, it specifies a fraction of the mini-window frame's height. |
23618 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 23619 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 23620 | |
7ee72033 MB |
23621 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
23622 | doc: /* *How to resize mini-windows. | |
228299fa GM |
23623 | A value of nil means don't automatically resize mini-windows. |
23624 | A value of t means resize them to fit the text displayed in them. | |
23625 | A value of `grow-only', the default, means let mini-windows grow | |
23626 | only, until their display becomes empty, at which point the windows | |
23627 | go back to their normal size. */); | |
6422c1d7 GM |
23628 | Vresize_mini_windows = Qgrow_only; |
23629 | ||
cfe03a41 KS |
23630 | DEFVAR_LISP ("blink-cursor-alist", &Vblink_cursor_alist, |
23631 | doc: /* Alist specifying how to blink the cursor off. | |
23632 | Each element has the form (ON-STATE . OFF-STATE). Whenever the | |
23633 | `cursor-type' frame-parameter or variable equals ON-STATE, | |
23634 | comparing using `equal', Emacs uses OFF-STATE to specify | |
2cb33a98 RS |
23635 | how to blink it off. ON-STATE and OFF-STATE are values for |
23636 | the `cursor-type' frame parameter. | |
23637 | ||
23638 | If a frame's ON-STATE has no entry in this list, | |
23639 | the frame's other specifications determine how to blink the cursor off. */); | |
cfe03a41 | 23640 | Vblink_cursor_alist = Qnil; |
2311178e | 23641 | |
e76d28d5 | 23642 | DEFVAR_BOOL ("auto-hscroll-mode", &automatic_hscrolling_p, |
7ee72033 | 23643 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); |
d475bcb8 | 23644 | automatic_hscrolling_p = 1; |
1df7e8f0 | 23645 | |
e76d28d5 | 23646 | DEFVAR_INT ("hscroll-margin", &hscroll_margin, |
1df7e8f0 EZ |
23647 | doc: /* *How many columns away from the window edge point is allowed to get |
23648 | before automatic hscrolling will horizontally scroll the window. */); | |
e76d28d5 | 23649 | hscroll_margin = 5; |
1df7e8f0 | 23650 | |
e76d28d5 | 23651 | DEFVAR_LISP ("hscroll-step", &Vhscroll_step, |
1df7e8f0 EZ |
23652 | doc: /* *How many columns to scroll the window when point gets too close to the edge. |
23653 | When point is less than `automatic-hscroll-margin' columns from the window | |
23654 | edge, automatic hscrolling will scroll the window by the amount of columns | |
23655 | determined by this variable. If its value is a positive integer, scroll that | |
23656 | many columns. If it's a positive floating-point number, it specifies the | |
23657 | fraction of the window's width to scroll. If it's nil or zero, point will be | |
23658 | centered horizontally after the scroll. Any other value, including negative | |
23659 | numbers, are treated as if the value were zero. | |
23660 | ||
23661 | Automatic hscrolling always moves point outside the scroll margin, so if | |
23662 | point was more than scroll step columns inside the margin, the window will | |
23663 | scroll more than the value given by the scroll step. | |
23664 | ||
23665 | Note that the lower bound for automatic hscrolling specified by `scroll-left' | |
23666 | and `scroll-right' overrides this variable's effect. */); | |
e76d28d5 | 23667 | Vhscroll_step = make_number (0); |
2311178e | 23668 | |
7ee72033 MB |
23669 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
23670 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 23671 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 23672 | message_truncate_lines = 0; |
0bca8940 | 23673 | |
7ee72033 | 23674 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
e6d09683 RS |
23675 | doc: /* Normal hook run to update the menu bar definitions. |
23676 | Redisplay runs this hook before it redisplays the menu bar. | |
23677 | This is used to update submenus such as Buffers, | |
23678 | whose contents depend on various data. */); | |
6422c1d7 | 23679 | Vmenu_bar_update_hook = Qnil; |
2311178e | 23680 | |
7ee72033 MB |
23681 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
23682 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 23683 | inhibit_menubar_update = 0; |
30a3f61c | 23684 | |
7ee72033 MB |
23685 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
23686 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 23687 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 23688 | |
26683087 RS |
23689 | DEFVAR_BOOL ("inhibit-free-realized-faces", &inhibit_free_realized_faces, |
23690 | doc: /* Non-nil means don't free realized faces. Internal use only. */); | |
23691 | inhibit_free_realized_faces = 0; | |
23692 | ||
69d1f7c9 | 23693 | #if GLYPH_DEBUG |
76cb5e06 GM |
23694 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
23695 | doc: /* Inhibit try_window_id display optimization. */); | |
23696 | inhibit_try_window_id = 0; | |
23697 | ||
23698 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
23699 | doc: /* Inhibit try_window_reusing display optimization. */); | |
23700 | inhibit_try_window_reusing = 0; | |
23701 | ||
23702 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
23703 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
23704 | inhibit_try_cursor_movement = 0; | |
23705 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
23706 | } |
23707 | ||
5f5c8ee5 GM |
23708 | |
23709 | /* Initialize this module when Emacs starts. */ | |
23710 | ||
dfcf069d | 23711 | void |
a2889657 JB |
23712 | init_xdisp () |
23713 | { | |
23714 | Lisp_Object root_window; | |
5f5c8ee5 | 23715 | struct window *mini_w; |
a2889657 | 23716 | |
04612a64 GM |
23717 | current_header_line_height = current_mode_line_height = -1; |
23718 | ||
5f5c8ee5 | 23719 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
23720 | |
23721 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 23722 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 23723 | |
a2889657 JB |
23724 | if (!noninteractive) |
23725 | { | |
5f5c8ee5 GM |
23726 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
23727 | int i; | |
23728 | ||
da8b7f4f | 23729 | XWINDOW (root_window)->top_line = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 23730 | set_window_height (root_window, |
da8b7f4f | 23731 | FRAME_LINES (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 23732 | 0); |
da8b7f4f | 23733 | mini_w->top_line = make_number (FRAME_LINES (f) - 1); |
a2889657 JB |
23734 | set_window_height (minibuf_window, 1, 0); |
23735 | ||
da8b7f4f KS |
23736 | XWINDOW (root_window)->total_cols = make_number (FRAME_COLS (f)); |
23737 | mini_w->total_cols = make_number (FRAME_COLS (f)); | |
5f5c8ee5 GM |
23738 | |
23739 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
23740 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
23741 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
23742 | ||
2311178e | 23743 | /* The default ellipsis glyphs `...'. */ |
5f5c8ee5 | 23744 | for (i = 0; i < 3; ++i) |
ac90c44f | 23745 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 23746 | } |
5f5c8ee5 | 23747 | |
5f5c8ee5 | 23748 | { |
93da8435 SM |
23749 | /* Allocate the buffer for frame titles. |
23750 | Also used for `format-mode-line'. */ | |
5f5c8ee5 | 23751 | int size = 100; |
4c0e4b80 KS |
23752 | mode_line_noprop_buf = (char *) xmalloc (size); |
23753 | mode_line_noprop_buf_end = mode_line_noprop_buf + size; | |
23754 | mode_line_noprop_ptr = mode_line_noprop_buf; | |
23755 | mode_line_target = MODE_LINE_DISPLAY; | |
5f5c8ee5 | 23756 | } |
2311178e | 23757 | |
21fdfb65 | 23758 | help_echo_showing_p = 0; |
a2889657 | 23759 | } |
5f5c8ee5 GM |
23760 | |
23761 | ||
ab5796a9 MB |
23762 | /* arch-tag: eacc864d-bb6a-4b74-894a-1a4399a1358b |
23763 | (do not change this comment) */ |