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a2889657 | 1 | /* Display generation from window structure and buffer text. |
1a89be1e | 2 | Copyright (C) 1985,86,87,88,93,94,95,97,98,99,2000,01,02,03 |
5f5c8ee5 | 3 | Free Software Foundation, Inc. |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 | 21 | |
5f5c8ee5 GM |
22 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
23 | ||
24 | Redisplay. | |
25 | ||
26 | Emacs separates the task of updating the display from code | |
27 | modifying global state, e.g. buffer text. This way functions | |
28 | operating on buffers don't also have to be concerned with updating | |
29 | the display. | |
30 | ||
31 | Updating the display is triggered by the Lisp interpreter when it | |
32 | decides it's time to do it. This is done either automatically for | |
33 | you as part of the interpreter's command loop or as the result of | |
34 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
35 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
48400103 | 36 | let's say almost---see the description of direct update |
4b41cebb | 37 | operations, below.) |
5f5c8ee5 GM |
38 | |
39 | The following diagram shows how redisplay code is invoked. As you | |
40 | can see, Lisp calls redisplay and vice versa. Under window systems | |
41 | like X, some portions of the redisplay code are also called | |
42 | asynchronously during mouse movement or expose events. It is very | |
43 | important that these code parts do NOT use the C library (malloc, | |
44 | free) because many C libraries under Unix are not reentrant. They | |
45 | may also NOT call functions of the Lisp interpreter which could | |
46 | change the interpreter's state. If you don't follow these rules, | |
47 | you will encounter bugs which are very hard to explain. | |
48 | ||
49 | (Direct functions, see below) | |
2311178e | 50 | direct_output_for_insert, |
5f5c8ee5 GM |
51 | direct_forward_char (dispnew.c) |
52 | +---------------------------------+ | |
53 | | | | |
54 | | V | |
82a7ab23 | 55 | +--------------+ redisplay +----------------+ |
5f5c8ee5 GM |
56 | | Lisp machine |---------------->| Redisplay code |<--+ |
57 | +--------------+ (xdisp.c) +----------------+ | | |
58 | ^ | | | |
59 | +----------------------------------+ | | |
60 | Don't use this path when called | | |
61 | asynchronously! | | |
62 | | | |
63 | expose_window (asynchronous) | | |
64 | | | |
65 | X expose events -----+ | |
66 | ||
959bc044 | 67 | What does redisplay do? Obviously, it has to figure out somehow what |
5f5c8ee5 GM |
68 | has been changed since the last time the display has been updated, |
69 | and to make these changes visible. Preferably it would do that in | |
70 | a moderately intelligent way, i.e. fast. | |
71 | ||
72 | Changes in buffer text can be deduced from window and buffer | |
73 | structures, and from some global variables like `beg_unchanged' and | |
74 | `end_unchanged'. The contents of the display are additionally | |
75 | recorded in a `glyph matrix', a two-dimensional matrix of glyph | |
76 | structures. Each row in such a matrix corresponds to a line on the | |
77 | display, and each glyph in a row corresponds to a column displaying | |
78 | a character, an image, or what else. This matrix is called the | |
79 | `current glyph matrix' or `current matrix' in redisplay | |
80 | terminology. | |
81 | ||
82 | For buffer parts that have been changed since the last update, a | |
83 | second glyph matrix is constructed, the so called `desired glyph | |
84 | matrix' or short `desired matrix'. Current and desired matrix are | |
85 | then compared to find a cheap way to update the display, e.g. by | |
86 | reusing part of the display by scrolling lines. | |
87 | ||
88 | ||
89 | Direct operations. | |
90 | ||
48400103 | 91 | You will find a lot of redisplay optimizations when you start |
5f5c8ee5 GM |
92 | looking at the innards of redisplay. The overall goal of all these |
93 | optimizations is to make redisplay fast because it is done | |
94 | frequently. | |
95 | ||
96 | Two optimizations are not found in xdisp.c. These are the direct | |
97 | operations mentioned above. As the name suggests they follow a | |
98 | different principle than the rest of redisplay. Instead of | |
99 | building a desired matrix and then comparing it with the current | |
100 | display, they perform their actions directly on the display and on | |
101 | the current matrix. | |
102 | ||
103 | One direct operation updates the display after one character has | |
104 | been entered. The other one moves the cursor by one position | |
105 | forward or backward. You find these functions under the names | |
106 | `direct_output_for_insert' and `direct_output_forward_char' in | |
107 | dispnew.c. | |
108 | ||
2311178e | 109 | |
5f5c8ee5 GM |
110 | Desired matrices. |
111 | ||
112 | Desired matrices are always built per Emacs window. The function | |
113 | `display_line' is the central function to look at if you are | |
114 | interested. It constructs one row in a desired matrix given an | |
115 | iterator structure containing both a buffer position and a | |
116 | description of the environment in which the text is to be | |
117 | displayed. But this is too early, read on. | |
118 | ||
119 | Characters and pixmaps displayed for a range of buffer text depend | |
120 | on various settings of buffers and windows, on overlays and text | |
121 | properties, on display tables, on selective display. The good news | |
122 | is that all this hairy stuff is hidden behind a small set of | |
959bc044 | 123 | interface functions taking an iterator structure (struct it) |
5f5c8ee5 GM |
124 | argument. |
125 | ||
48400103 | 126 | Iteration over things to be displayed is then simple. It is |
1178ddde GM |
127 | started by initializing an iterator with a call to init_iterator. |
128 | Calls to get_next_display_element fill the iterator structure with | |
129 | relevant information about the next thing to display. Calls to | |
5f5c8ee5 GM |
130 | set_iterator_to_next move the iterator to the next thing. |
131 | ||
132 | Besides this, an iterator also contains information about the | |
133 | display environment in which glyphs for display elements are to be | |
134 | produced. It has fields for the width and height of the display, | |
135 | the information whether long lines are truncated or continued, a | |
136 | current X and Y position, and lots of other stuff you can better | |
137 | see in dispextern.h. | |
138 | ||
139 | Glyphs in a desired matrix are normally constructed in a loop | |
140 | calling get_next_display_element and then produce_glyphs. The call | |
141 | to produce_glyphs will fill the iterator structure with pixel | |
142 | information about the element being displayed and at the same time | |
143 | produce glyphs for it. If the display element fits on the line | |
144 | being displayed, set_iterator_to_next is called next, otherwise the | |
145 | glyphs produced are discarded. | |
146 | ||
147 | ||
148 | Frame matrices. | |
149 | ||
150 | That just couldn't be all, could it? What about terminal types not | |
151 | supporting operations on sub-windows of the screen? To update the | |
152 | display on such a terminal, window-based glyph matrices are not | |
153 | well suited. To be able to reuse part of the display (scrolling | |
154 | lines up and down), we must instead have a view of the whole | |
155 | screen. This is what `frame matrices' are for. They are a trick. | |
156 | ||
157 | Frames on terminals like above have a glyph pool. Windows on such | |
158 | a frame sub-allocate their glyph memory from their frame's glyph | |
159 | pool. The frame itself is given its own glyph matrices. By | |
160 | coincidence---or maybe something else---rows in window glyph | |
161 | matrices are slices of corresponding rows in frame matrices. Thus | |
162 | writing to window matrices implicitly updates a frame matrix which | |
163 | provides us with the view of the whole screen that we originally | |
164 | wanted to have without having to move many bytes around. To be | |
165 | honest, there is a little bit more done, but not much more. If you | |
166 | plan to extend that code, take a look at dispnew.c. The function | |
167 | build_frame_matrix is a good starting point. */ | |
a2889657 | 168 | |
18160b98 | 169 | #include <config.h> |
a2889657 | 170 | #include <stdio.h> |
7ee72033 | 171 | |
a2889657 | 172 | #include "lisp.h" |
546a4f00 | 173 | #include "keyboard.h" |
44fa5b1e | 174 | #include "frame.h" |
a2889657 JB |
175 | #include "window.h" |
176 | #include "termchar.h" | |
177 | #include "dispextern.h" | |
178 | #include "buffer.h" | |
1c9241f5 | 179 | #include "charset.h" |
a2889657 JB |
180 | #include "indent.h" |
181 | #include "commands.h" | |
fa3c6b4d | 182 | #include "keymap.h" |
a2889657 JB |
183 | #include "macros.h" |
184 | #include "disptab.h" | |
30c566e4 | 185 | #include "termhooks.h" |
b0a0fbda | 186 | #include "intervals.h" |
1c9241f5 KH |
187 | #include "coding.h" |
188 | #include "process.h" | |
dfcf069d | 189 | #include "region-cache.h" |
0ef75e87 | 190 | #include "fontset.h" |
f9b3d256 | 191 | #include "blockinput.h" |
dfcf069d | 192 | |
6d55d620 | 193 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
194 | #include "xterm.h" |
195 | #endif | |
a75dfea0 AI |
196 | #ifdef WINDOWSNT |
197 | #include "w32term.h" | |
198 | #endif | |
e0f712ba | 199 | #ifdef MAC_OS |
1a578e9b | 200 | #include "macterm.h" |
365fa1b3 AC |
201 | |
202 | Cursor No_Cursor; | |
1a578e9b | 203 | #endif |
a2889657 | 204 | |
1dabd0cf KS |
205 | #ifndef FRAME_X_OUTPUT |
206 | #define FRAME_X_OUTPUT(f) ((f)->output_data.x) | |
207 | #endif | |
208 | ||
5f5c8ee5 GM |
209 | #define INFINITY 10000000 |
210 | ||
488dd4c4 JD |
211 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
212 | || defined (USE_GTK) | |
2e621225 | 213 | extern void set_frame_menubar P_ ((struct frame *f, int, int)); |
cd6dfed6 | 214 | extern int pending_menu_activation; |
76412d64 RS |
215 | #endif |
216 | ||
a2889657 JB |
217 | extern int interrupt_input; |
218 | extern int command_loop_level; | |
219 | ||
b6436d4e | 220 | extern int minibuffer_auto_raise; |
b2b5455d | 221 | extern Lisp_Object Vminibuffer_list; |
b6436d4e | 222 | |
c4628384 | 223 | extern Lisp_Object Qface; |
fec8f23e | 224 | extern Lisp_Object Qmode_line, Qmode_line_inactive, Qheader_line; |
c4628384 | 225 | |
399164b4 KH |
226 | extern Lisp_Object Voverriding_local_map; |
227 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 228 | extern Lisp_Object Qmenu_item; |
0b063c27 | 229 | extern Lisp_Object Qwhen; |
fa3c6b4d | 230 | extern Lisp_Object Qhelp_echo; |
399164b4 | 231 | |
d46fb96a | 232 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 233 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 234 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 235 | Lisp_Object Qinhibit_point_motion_hooks; |
0b063c27 | 236 | Lisp_Object QCeval, QCfile, QCdata, QCpropertize; |
5f5c8ee5 | 237 | Lisp_Object Qfontified; |
6422c1d7 | 238 | Lisp_Object Qgrow_only; |
869fb12c | 239 | Lisp_Object Qinhibit_eval_during_redisplay; |
b384d6f8 | 240 | Lisp_Object Qbuffer_position, Qposition, Qobject; |
5f5c8ee5 | 241 | |
cfe03a41 KS |
242 | /* Cursor shapes */ |
243 | Lisp_Object Qbar, Qhbar, Qbox, Qhollow; | |
244 | ||
c53a1624 RS |
245 | Lisp_Object Qrisky_local_variable; |
246 | ||
7033d6df RS |
247 | /* Holds the list (error). */ |
248 | Lisp_Object list_of_error; | |
249 | ||
5f5c8ee5 GM |
250 | /* Functions called to fontify regions of text. */ |
251 | ||
252 | Lisp_Object Vfontification_functions; | |
253 | Lisp_Object Qfontification_functions; | |
254 | ||
fa3c6b4d KS |
255 | /* Non-zero means automatically select any window when the mouse |
256 | cursor moves into it. */ | |
257 | int mouse_autoselect_window; | |
258 | ||
e037b9ec | 259 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
260 | over them. */ |
261 | ||
e037b9ec | 262 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 263 | |
e037b9ec | 264 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 265 | |
35a41507 | 266 | Lisp_Object Vtool_bar_button_margin; |
5f5c8ee5 | 267 | |
e037b9ec | 268 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 269 | |
31ade731 | 270 | EMACS_INT tool_bar_button_relief; |
5f5c8ee5 | 271 | |
e037b9ec | 272 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
273 | items are visible, and no blank lines remain. */ |
274 | ||
e037b9ec | 275 | int auto_resize_tool_bars_p; |
399164b4 | 276 | |
fa3c6b4d KS |
277 | /* Non-zero means draw block and hollow cursor as wide as the glyph |
278 | under it. For example, if a block cursor is over a tab, it will be | |
279 | drawn as wide as that tab on the display. */ | |
280 | ||
281 | int x_stretch_cursor_p; | |
282 | ||
735c094c KH |
283 | /* Non-nil means don't actually do any redisplay. */ |
284 | ||
285 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
286 | ||
30a3f61c GM |
287 | /* Non-zero means Lisp evaluation during redisplay is inhibited. */ |
288 | ||
869fb12c | 289 | int inhibit_eval_during_redisplay; |
30a3f61c | 290 | |
5f5c8ee5 GM |
291 | /* Names of text properties relevant for redisplay. */ |
292 | ||
a7e27ef7 | 293 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
4b41cebb | 294 | extern Lisp_Object Qface, Qinvisible, Qwidth; |
5f5c8ee5 GM |
295 | |
296 | /* Symbols used in text property values. */ | |
297 | ||
298 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 299 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 300 | Lisp_Object Qmargin; |
a7e27ef7 | 301 | extern Lisp_Object Qheight; |
133c764e | 302 | extern Lisp_Object QCwidth, QCheight, QCascent; |
5f5c8ee5 | 303 | |
8f897821 | 304 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 305 | |
8f897821 | 306 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
307 | |
308 | /* Name of the face used to highlight trailing whitespace. */ | |
309 | ||
310 | Lisp_Object Qtrailing_whitespace; | |
311 | ||
312 | /* The symbol `image' which is the car of the lists used to represent | |
313 | images in Lisp. */ | |
314 | ||
315 | Lisp_Object Qimage; | |
316 | ||
317 | /* Non-zero means print newline to stdout before next mini-buffer | |
318 | message. */ | |
a2889657 JB |
319 | |
320 | int noninteractive_need_newline; | |
321 | ||
5f5c8ee5 | 322 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 323 | |
3c6595e0 | 324 | static int message_log_need_newline; |
f88eb0b6 | 325 | |
b14bc55e RS |
326 | /* Three markers that message_dolog uses. |
327 | It could allocate them itself, but that causes trouble | |
328 | in handling memory-full errors. */ | |
329 | static Lisp_Object message_dolog_marker1; | |
330 | static Lisp_Object message_dolog_marker2; | |
331 | static Lisp_Object message_dolog_marker3; | |
5f5c8ee5 GM |
332 | \f |
333 | /* The buffer position of the first character appearing entirely or | |
334 | partially on the line of the selected window which contains the | |
335 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
336 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 337 | |
5f5c8ee5 | 338 | static struct text_pos this_line_start_pos; |
a2889657 | 339 | |
5f5c8ee5 GM |
340 | /* Number of characters past the end of the line above, including the |
341 | terminating newline. */ | |
342 | ||
343 | static struct text_pos this_line_end_pos; | |
344 | ||
345 | /* The vertical positions and the height of this line. */ | |
a2889657 | 346 | |
a2889657 | 347 | static int this_line_vpos; |
5f5c8ee5 GM |
348 | static int this_line_y; |
349 | static int this_line_pixel_height; | |
350 | ||
351 | /* X position at which this display line starts. Usually zero; | |
352 | negative if first character is partially visible. */ | |
353 | ||
354 | static int this_line_start_x; | |
a2889657 | 355 | |
5f5c8ee5 | 356 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 357 | |
a2889657 JB |
358 | static struct buffer *this_line_buffer; |
359 | ||
5f5c8ee5 GM |
360 | /* Nonzero means truncate lines in all windows less wide than the |
361 | frame. */ | |
a2889657 | 362 | |
a2889657 JB |
363 | int truncate_partial_width_windows; |
364 | ||
7bbe686f | 365 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 366 | |
7bbe686f | 367 | int unibyte_display_via_language_environment; |
2311178e | 368 | |
5f5c8ee5 GM |
369 | /* Nonzero means we have more than one non-mini-buffer-only frame. |
370 | Not guaranteed to be accurate except while parsing | |
371 | frame-title-format. */ | |
7bbe686f | 372 | |
d39b6696 KH |
373 | int multiple_frames; |
374 | ||
a2889657 JB |
375 | Lisp_Object Vglobal_mode_string; |
376 | ||
377 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 378 | |
a2889657 JB |
379 | Lisp_Object Voverlay_arrow_position; |
380 | ||
5f5c8ee5 GM |
381 | /* String to display for the arrow. Only used on terminal frames. */ |
382 | ||
a2889657 JB |
383 | Lisp_Object Voverlay_arrow_string; |
384 | ||
5f5c8ee5 GM |
385 | /* Values of those variables at last redisplay. However, if |
386 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
387 | numerical position. */ | |
388 | ||
d45de95b RS |
389 | static Lisp_Object last_arrow_position, last_arrow_string; |
390 | ||
5f5c8ee5 GM |
391 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
392 | ||
d39b6696 KH |
393 | Lisp_Object Vframe_title_format; |
394 | ||
5f5c8ee5 GM |
395 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
396 | ||
d39b6696 KH |
397 | Lisp_Object Vicon_title_format; |
398 | ||
08b610e4 RS |
399 | /* List of functions to call when a window's size changes. These |
400 | functions get one arg, a frame on which one or more windows' sizes | |
401 | have changed. */ | |
5f5c8ee5 | 402 | |
08b610e4 RS |
403 | static Lisp_Object Vwindow_size_change_functions; |
404 | ||
0bca8940 | 405 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 406 | |
a2889657 | 407 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 408 | |
5f5c8ee5 | 409 | static int overlay_arrow_seen; |
ca26e1c8 | 410 | |
fba9ce76 | 411 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 412 | |
5f5c8ee5 GM |
413 | int highlight_nonselected_windows; |
414 | ||
415 | /* If cursor motion alone moves point off frame, try scrolling this | |
416 | many lines up or down if that will bring it back. */ | |
417 | ||
31ade731 | 418 | static EMACS_INT scroll_step; |
a2889657 | 419 | |
4b41cebb | 420 | /* Nonzero means scroll just far enough to bring point back on the |
5f5c8ee5 GM |
421 | screen, when appropriate. */ |
422 | ||
31ade731 | 423 | static EMACS_INT scroll_conservatively; |
0789adb2 | 424 | |
5f5c8ee5 GM |
425 | /* Recenter the window whenever point gets within this many lines of |
426 | the top or bottom of the window. This value is translated into a | |
da8b7f4f KS |
427 | pixel value by multiplying it with FRAME_LINE_HEIGHT, which means |
428 | that there is really a fixed pixel height scroll margin. */ | |
5f5c8ee5 | 429 | |
31ade731 | 430 | EMACS_INT scroll_margin; |
9afd2168 | 431 | |
5f5c8ee5 GM |
432 | /* Number of windows showing the buffer of the selected window (or |
433 | another buffer with the same base buffer). keyboard.c refers to | |
434 | this. */ | |
a2889657 | 435 | |
a2889657 JB |
436 | int buffer_shared; |
437 | ||
5f5c8ee5 | 438 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 439 | |
5f5c8ee5 | 440 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 441 | |
1862a24e MB |
442 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
443 | (this slightly odd definition is for compatibility with previous versions | |
444 | of emacs), non-zero means display them using their respective faces. | |
445 | ||
446 | This variable is deprecated. */ | |
a2889657 | 447 | |
a2889657 JB |
448 | int mode_line_inverse_video; |
449 | ||
5f5c8ee5 GM |
450 | /* Prompt to display in front of the mini-buffer contents. */ |
451 | ||
8c5b6a0a | 452 | Lisp_Object minibuf_prompt; |
a2889657 | 453 | |
5f5c8ee5 GM |
454 | /* Width of current mini-buffer prompt. Only set after display_line |
455 | of the line that contains the prompt. */ | |
456 | ||
a2889657 | 457 | int minibuf_prompt_width; |
5f5c8ee5 | 458 | |
5f5c8ee5 GM |
459 | /* This is the window where the echo area message was displayed. It |
460 | is always a mini-buffer window, but it may not be the same window | |
461 | currently active as a mini-buffer. */ | |
462 | ||
73af359d RS |
463 | Lisp_Object echo_area_window; |
464 | ||
c6e89d6c GM |
465 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
466 | pushes the current message and the value of | |
467 | message_enable_multibyte on the stack, the function restore_message | |
468 | pops the stack and displays MESSAGE again. */ | |
469 | ||
470 | Lisp_Object Vmessage_stack; | |
471 | ||
a3788d53 RS |
472 | /* Nonzero means multibyte characters were enabled when the echo area |
473 | message was specified. */ | |
5f5c8ee5 | 474 | |
a3788d53 RS |
475 | int message_enable_multibyte; |
476 | ||
4b41cebb | 477 | /* Nonzero if we should redraw the mode lines on the next redisplay. */ |
5f5c8ee5 | 478 | |
a2889657 JB |
479 | int update_mode_lines; |
480 | ||
5f5c8ee5 | 481 | /* Nonzero if window sizes or contents have changed since last |
4b41cebb | 482 | redisplay that finished. */ |
5f5c8ee5 | 483 | |
a2889657 JB |
484 | int windows_or_buffers_changed; |
485 | ||
5fb96e96 RS |
486 | /* Nonzero means a frame's cursor type has been changed. */ |
487 | ||
488 | int cursor_type_changed; | |
489 | ||
5f5c8ee5 GM |
490 | /* Nonzero after display_mode_line if %l was used and it displayed a |
491 | line number. */ | |
492 | ||
aa6d10fa RS |
493 | int line_number_displayed; |
494 | ||
495 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 496 | |
090703f4 | 497 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 498 | |
4b41cebb | 499 | /* Line width to consider when repositioning for line number display. */ |
5d121aec | 500 | |
31ade731 | 501 | static EMACS_INT line_number_display_limit_width; |
5d121aec | 502 | |
5f5c8ee5 GM |
503 | /* Number of lines to keep in the message log buffer. t means |
504 | infinite. nil means don't log at all. */ | |
505 | ||
5992c4f7 | 506 | Lisp_Object Vmessage_log_max; |
d45de95b | 507 | |
6a94510a GM |
508 | /* The name of the *Messages* buffer, a string. */ |
509 | ||
510 | static Lisp_Object Vmessages_buffer_name; | |
511 | ||
c6e89d6c GM |
512 | /* Current, index 0, and last displayed echo area message. Either |
513 | buffers from echo_buffers, or nil to indicate no message. */ | |
514 | ||
515 | Lisp_Object echo_area_buffer[2]; | |
516 | ||
517 | /* The buffers referenced from echo_area_buffer. */ | |
518 | ||
519 | static Lisp_Object echo_buffer[2]; | |
520 | ||
521 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
522 | ||
523 | static Lisp_Object Vwith_echo_area_save_vector; | |
524 | ||
525 | /* Non-zero means display_echo_area should display the last echo area | |
526 | message again. Set by redisplay_preserve_echo_area. */ | |
527 | ||
528 | static int display_last_displayed_message_p; | |
529 | ||
530 | /* Nonzero if echo area is being used by print; zero if being used by | |
531 | message. */ | |
532 | ||
533 | int message_buf_print; | |
534 | ||
e1477f43 GM |
535 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
536 | ||
537 | Lisp_Object Qinhibit_menubar_update; | |
538 | int inhibit_menubar_update; | |
539 | ||
9142dd5b GM |
540 | /* Maximum height for resizing mini-windows. Either a float |
541 | specifying a fraction of the available height, or an integer | |
542 | specifying a number of lines. */ | |
c6e89d6c | 543 | |
ad4f174e GM |
544 | Lisp_Object Vmax_mini_window_height; |
545 | ||
546 | /* Non-zero means messages should be displayed with truncated | |
547 | lines instead of being continued. */ | |
548 | ||
549 | int message_truncate_lines; | |
550 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 551 | |
6e019995 GM |
552 | /* Set to 1 in clear_message to make redisplay_internal aware |
553 | of an emptied echo area. */ | |
554 | ||
555 | static int message_cleared_p; | |
556 | ||
d6d26ed3 GM |
557 | /* Non-zero means we want a hollow cursor in windows that are not |
558 | selected. Zero means there's no cursor in such windows. */ | |
559 | ||
cfe03a41 | 560 | Lisp_Object Vcursor_in_non_selected_windows; |
af79bccb | 561 | Lisp_Object Qcursor_in_non_selected_windows; |
d6d26ed3 | 562 | |
cfe03a41 KS |
563 | /* How to blink the default frame cursor off. */ |
564 | Lisp_Object Vblink_cursor_alist; | |
565 | ||
5f5c8ee5 GM |
566 | /* A scratch glyph row with contents used for generating truncation |
567 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 568 | |
5f5c8ee5 GM |
569 | #define MAX_SCRATCH_GLYPHS 100 |
570 | struct glyph_row scratch_glyph_row; | |
571 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 572 | |
5f5c8ee5 GM |
573 | /* Ascent and height of the last line processed by move_it_to. */ |
574 | ||
575 | static int last_max_ascent, last_height; | |
576 | ||
21fdfb65 GM |
577 | /* Non-zero if there's a help-echo in the echo area. */ |
578 | ||
579 | int help_echo_showing_p; | |
580 | ||
04612a64 GM |
581 | /* If >= 0, computed, exact values of mode-line and header-line height |
582 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
583 | CURRENT_HEADER_LINE_HEIGHT. */ | |
584 | ||
585 | int current_mode_line_height, current_header_line_height; | |
586 | ||
5f5c8ee5 | 587 | /* The maximum distance to look ahead for text properties. Values |
2311178e | 588 | that are too small let us call compute_char_face and similar |
5f5c8ee5 GM |
589 | functions too often which is expensive. Values that are too large |
590 | let us call compute_char_face and alike too often because we | |
591 | might not be interested in text properties that far away. */ | |
592 | ||
593 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
594 | ||
47589c8c GM |
595 | #if GLYPH_DEBUG |
596 | ||
76cb5e06 GM |
597 | /* Variables to turn off display optimizations from Lisp. */ |
598 | ||
599 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
600 | int inhibit_try_cursor_movement; | |
601 | ||
5f5c8ee5 GM |
602 | /* Non-zero means print traces of redisplay if compiled with |
603 | GLYPH_DEBUG != 0. */ | |
604 | ||
5f5c8ee5 | 605 | int trace_redisplay_p; |
47589c8c | 606 | |
546a4f00 | 607 | #endif /* GLYPH_DEBUG */ |
47589c8c | 608 | |
546a4f00 AI |
609 | #ifdef DEBUG_TRACE_MOVE |
610 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
611 | int trace_move; |
612 | ||
47589c8c GM |
613 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
614 | #else | |
91c3f500 | 615 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 616 | #endif |
2311178e | 617 | |
d475bcb8 GM |
618 | /* Non-zero means automatically scroll windows horizontally to make |
619 | point visible. */ | |
620 | ||
621 | int automatic_hscrolling_p; | |
622 | ||
1df7e8f0 EZ |
623 | /* How close to the margin can point get before the window is scrolled |
624 | horizontally. */ | |
5d335845 | 625 | EMACS_INT hscroll_margin; |
1df7e8f0 EZ |
626 | |
627 | /* How much to scroll horizontally when point is inside the above margin. */ | |
e76d28d5 | 628 | Lisp_Object Vhscroll_step; |
1df7e8f0 | 629 | |
e00daaa0 GM |
630 | /* A list of symbols, one for each supported image type. */ |
631 | ||
632 | Lisp_Object Vimage_types; | |
633 | ||
6422c1d7 | 634 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 635 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
636 | display. If `grow-only', let mini-windows grow only until they |
637 | become empty. */ | |
638 | ||
639 | Lisp_Object Vresize_mini_windows; | |
640 | ||
82a7ab23 RS |
641 | /* Buffer being redisplayed -- for redisplay_window_error. */ |
642 | ||
643 | struct buffer *displayed_buffer; | |
644 | ||
5f5c8ee5 GM |
645 | /* Value returned from text property handlers (see below). */ |
646 | ||
647 | enum prop_handled | |
3c6595e0 | 648 | { |
5f5c8ee5 GM |
649 | HANDLED_NORMALLY, |
650 | HANDLED_RECOMPUTE_PROPS, | |
651 | HANDLED_OVERLAY_STRING_CONSUMED, | |
652 | HANDLED_RETURN | |
653 | }; | |
3c6595e0 | 654 | |
5f5c8ee5 GM |
655 | /* A description of text properties that redisplay is interested |
656 | in. */ | |
3c6595e0 | 657 | |
5f5c8ee5 GM |
658 | struct props |
659 | { | |
660 | /* The name of the property. */ | |
661 | Lisp_Object *name; | |
90adcf20 | 662 | |
5f5c8ee5 GM |
663 | /* A unique index for the property. */ |
664 | enum prop_idx idx; | |
665 | ||
666 | /* A handler function called to set up iterator IT from the property | |
667 | at IT's current position. Value is used to steer handle_stop. */ | |
668 | enum prop_handled (*handler) P_ ((struct it *it)); | |
669 | }; | |
670 | ||
671 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
672 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
673 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 674 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
675 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
676 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
677 | ||
678 | /* Properties handled by iterators. */ | |
679 | ||
680 | static struct props it_props[] = | |
5992c4f7 | 681 | { |
5f5c8ee5 GM |
682 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
683 | /* Handle `face' before `display' because some sub-properties of | |
684 | `display' need to know the face. */ | |
685 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
686 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
687 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 688 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
689 | {NULL, 0, NULL} |
690 | }; | |
5992c4f7 | 691 | |
5f5c8ee5 GM |
692 | /* Value is the position described by X. If X is a marker, value is |
693 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 694 | |
5f5c8ee5 | 695 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 696 | |
5f5c8ee5 | 697 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 698 | |
5f5c8ee5 GM |
699 | enum move_it_result |
700 | { | |
701 | /* Not used. Undefined value. */ | |
702 | MOVE_UNDEFINED, | |
bab29e15 | 703 | |
5f5c8ee5 GM |
704 | /* Move ended at the requested buffer position or ZV. */ |
705 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 706 | |
5f5c8ee5 GM |
707 | /* Move ended at the requested X pixel position. */ |
708 | MOVE_X_REACHED, | |
12adba34 | 709 | |
5f5c8ee5 GM |
710 | /* Move within a line ended at the end of a line that must be |
711 | continued. */ | |
712 | MOVE_LINE_CONTINUED, | |
2311178e | 713 | |
5f5c8ee5 GM |
714 | /* Move within a line ended at the end of a line that would |
715 | be displayed truncated. */ | |
716 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 717 | |
5f5c8ee5 GM |
718 | /* Move within a line ended at a line end. */ |
719 | MOVE_NEWLINE_OR_CR | |
720 | }; | |
12adba34 | 721 | |
1987b083 RS |
722 | /* This counter is used to clear the face cache every once in a while |
723 | in redisplay_internal. It is incremented for each redisplay. | |
724 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
725 | cleared. */ | |
726 | ||
727 | #define CLEAR_FACE_CACHE_COUNT 500 | |
728 | static int clear_face_cache_count; | |
729 | ||
730 | /* Record the previous terminal frame we displayed. */ | |
731 | ||
732 | static struct frame *previous_terminal_frame; | |
733 | ||
734 | /* Non-zero while redisplay_internal is in progress. */ | |
735 | ||
736 | int redisplaying_p; | |
737 | ||
26683087 RS |
738 | /* Non-zero means don't free realized faces. Bound while freeing |
739 | realized faces is dangerous because glyph matrices might still | |
740 | reference them. */ | |
1987b083 | 741 | |
26683087 RS |
742 | int inhibit_free_realized_faces; |
743 | Lisp_Object Qinhibit_free_realized_faces; | |
ff6c30e5 | 744 | |
fa3c6b4d KS |
745 | /* If a string, XTread_socket generates an event to display that string. |
746 | (The display is done in read_char.) */ | |
747 | ||
748 | Lisp_Object help_echo_string; | |
749 | Lisp_Object help_echo_window; | |
750 | Lisp_Object help_echo_object; | |
751 | int help_echo_pos; | |
752 | ||
753 | /* Temporary variable for XTread_socket. */ | |
754 | ||
755 | Lisp_Object previous_help_echo_string; | |
756 | ||
757 | ||
5f5c8ee5 GM |
758 | \f |
759 | /* Function prototypes. */ | |
760 | ||
5a08cbaf | 761 | static void setup_for_ellipsis P_ ((struct it *)); |
43c09969 | 762 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
74bd6d65 GM |
763 | static int single_display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
764 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); | |
cafafe0b | 765 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 766 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 767 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
768 | |
769 | #if 0 | |
2e621225 | 770 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
771 | #endif |
772 | ||
2e621225 GM |
773 | static int next_element_from_ellipsis P_ ((struct it *)); |
774 | static void pint2str P_ ((char *, int, int)); | |
775 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
776 | struct text_pos)); | |
777 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
778 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
779 | static void store_frame_title_char P_ ((char)); | |
50f80c2f | 780 | static int store_frame_title P_ ((const unsigned char *, int, int)); |
2e621225 GM |
781 | static void x_consider_frame_title P_ ((Lisp_Object)); |
782 | static void handle_stop P_ ((struct it *)); | |
783 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 784 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 785 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
786 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
787 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 788 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
789 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
790 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 791 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
792 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
793 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
794 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 795 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
796 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
797 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 798 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
50f80c2f | 799 | static int string_char_and_length P_ ((const unsigned char *, int, int *)); |
5f5c8ee5 GM |
800 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
801 | struct text_pos)); | |
802 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 803 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 GM |
804 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
805 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
806 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 807 | static int append_space P_ ((struct it *, int)); |
cb617e7c | 808 | static int make_cursor_line_fully_visible P_ ((struct window *)); |
03b0a4b4 | 809 | static int try_scrolling P_ ((Lisp_Object, int, EMACS_INT, EMACS_INT, int, int)); |
47589c8c | 810 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
811 | static int trailing_whitespace_p P_ ((int)); |
812 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
813 | static void push_it P_ ((struct it *)); |
814 | static void pop_it P_ ((struct it *)); | |
815 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
816 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 817 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
818 | static void redisplay_windows P_ ((Lisp_Object)); |
819 | static void redisplay_window P_ ((Lisp_Object, int)); | |
82a7ab23 RS |
820 | static Lisp_Object redisplay_window_error (); |
821 | static Lisp_Object redisplay_window_0 P_ ((Lisp_Object)); | |
822 | static Lisp_Object redisplay_window_1 P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
823 | static void update_menu_bar P_ ((struct frame *, int)); |
824 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
825 | static int try_window_id P_ ((struct window *)); | |
826 | static int display_line P_ ((struct it *)); | |
715e84c9 | 827 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 828 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
c53a1624 | 829 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object, Lisp_Object, int)); |
fec8f23e | 830 | static int store_mode_line_string P_ ((char *, Lisp_Object, int, int, int, Lisp_Object)); |
72f62cb5 | 831 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
832 | static void display_menu_bar P_ ((struct window *)); |
833 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
834 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
835 | int, int, struct it *, int, int, int, int)); | |
836 | static void compute_line_metrics P_ ((struct it *)); | |
837 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 838 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 839 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
840 | static void reseat P_ ((struct it *, struct text_pos, int)); |
841 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
842 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
843 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 844 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
845 | static int next_element_from_display_vector P_ ((struct it *)); |
846 | static int next_element_from_string P_ ((struct it *)); | |
847 | static int next_element_from_c_string P_ ((struct it *)); | |
848 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 849 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
850 | static int next_element_from_image P_ ((struct it *)); |
851 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 852 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
853 | static int init_from_display_pos P_ ((struct it *, struct window *, |
854 | struct display_pos *)); | |
5f5c8ee5 GM |
855 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
856 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
857 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
858 | int, int, int)); | |
859 | void move_it_vertically_backward P_ ((struct it *, int)); | |
860 | static void init_to_row_start P_ ((struct it *, struct window *, | |
861 | struct glyph_row *)); | |
47d57b22 GM |
862 | static int init_to_row_end P_ ((struct it *, struct window *, |
863 | struct glyph_row *)); | |
5f5c8ee5 | 864 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 865 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
866 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
867 | Lisp_Object, int)); | |
868 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
869 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
870 | static int number_of_chars P_ ((unsigned char *, int)); | |
871 | static void compute_stop_pos P_ ((struct it *)); | |
872 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
873 | Lisp_Object)); | |
874 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
875 | static int next_overlay_change P_ ((int)); | |
876 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
a61b7058 GM |
877 | Lisp_Object, struct text_pos *, |
878 | int)); | |
06a12811 | 879 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
880 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
881 | struct window *)); | |
5f5c8ee5 GM |
882 | |
883 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
884 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 885 | |
5f5c8ee5 | 886 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 887 | |
e037b9ec GM |
888 | static void update_tool_bar P_ ((struct frame *, int)); |
889 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
890 | static int redisplay_tool_bar P_ ((struct frame *)); | |
891 | static void display_tool_bar_line P_ ((struct it *)); | |
fa3c6b4d KS |
892 | static void notice_overwritten_cursor P_ ((struct window *, |
893 | enum glyph_row_area, | |
894 | int, int, int, int)); | |
895 | ||
896 | ||
12adba34 | 897 | |
5f5c8ee5 | 898 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 899 | |
5f5c8ee5 GM |
900 | \f |
901 | /*********************************************************************** | |
902 | Window display dimensions | |
903 | ***********************************************************************/ | |
12adba34 | 904 | |
40a301b3 RS |
905 | /* Return the bottom boundary y-position for text lines in window W. |
906 | This is the first y position at which a line cannot start. | |
907 | It is relative to the top of the window. | |
908 | ||
909 | This is the height of W minus the height of a mode line, if any. */ | |
5f5c8ee5 GM |
910 | |
911 | INLINE int | |
912 | window_text_bottom_y (w) | |
913 | struct window *w; | |
914 | { | |
da8b7f4f | 915 | int height = WINDOW_TOTAL_HEIGHT (w); |
1a578e9b | 916 | |
5f5c8ee5 GM |
917 | if (WINDOW_WANTS_MODELINE_P (w)) |
918 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
919 | return height; | |
f88eb0b6 KH |
920 | } |
921 | ||
5f5c8ee5 | 922 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 923 | means return the total width of W, not including fringes to |
5f5c8ee5 | 924 | the left and right of the window. */ |
ff6c30e5 | 925 | |
5f5c8ee5 GM |
926 | INLINE int |
927 | window_box_width (w, area) | |
928 | struct window *w; | |
929 | int area; | |
930 | { | |
da8b7f4f KS |
931 | int cols = XFASTINT (w->total_cols); |
932 | int pixels = 0; | |
2311178e | 933 | |
5f5c8ee5 | 934 | if (!w->pseudo_window_p) |
ff6c30e5 | 935 | { |
da8b7f4f | 936 | cols -= WINDOW_SCROLL_BAR_COLS (w); |
2311178e | 937 | |
5f5c8ee5 GM |
938 | if (area == TEXT_AREA) |
939 | { | |
da8b7f4f KS |
940 | if (INTEGERP (w->left_margin_cols)) |
941 | cols -= XFASTINT (w->left_margin_cols); | |
942 | if (INTEGERP (w->right_margin_cols)) | |
943 | cols -= XFASTINT (w->right_margin_cols); | |
944 | pixels = -WINDOW_TOTAL_FRINGE_WIDTH (w); | |
5f5c8ee5 GM |
945 | } |
946 | else if (area == LEFT_MARGIN_AREA) | |
da8b7f4f KS |
947 | { |
948 | cols = (INTEGERP (w->left_margin_cols) | |
949 | ? XFASTINT (w->left_margin_cols) : 0); | |
950 | pixels = 0; | |
951 | } | |
5f5c8ee5 | 952 | else if (area == RIGHT_MARGIN_AREA) |
da8b7f4f KS |
953 | { |
954 | cols = (INTEGERP (w->right_margin_cols) | |
955 | ? XFASTINT (w->right_margin_cols) : 0); | |
956 | pixels = 0; | |
957 | } | |
ff6c30e5 | 958 | } |
5f5c8ee5 | 959 | |
da8b7f4f | 960 | return cols * WINDOW_FRAME_COLUMN_WIDTH (w) + pixels; |
ff6c30e5 | 961 | } |
1adc55de | 962 | |
1adc55de | 963 | |
5f5c8ee5 | 964 | /* Return the pixel height of the display area of window W, not |
4b41cebb | 965 | including mode lines of W, if any. */ |
f88eb0b6 | 966 | |
5f5c8ee5 GM |
967 | INLINE int |
968 | window_box_height (w) | |
969 | struct window *w; | |
f88eb0b6 | 970 | { |
5f5c8ee5 | 971 | struct frame *f = XFRAME (w->frame); |
da8b7f4f | 972 | int height = WINDOW_TOTAL_HEIGHT (w); |
7ecd4937 GM |
973 | |
974 | xassert (height >= 0); | |
2311178e | 975 | |
d9c9e99c MB |
976 | /* Note: the code below that determines the mode-line/header-line |
977 | height is essentially the same as that contained in the macro | |
978 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
979 | the appropriate glyph row has its `mode_line_p' flag set, | |
980 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
981 | ||
5f5c8ee5 | 982 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
983 | { |
984 | struct glyph_row *ml_row | |
985 | = (w->current_matrix && w->current_matrix->rows | |
986 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
987 | : 0); | |
988 | if (ml_row && ml_row->mode_line_p) | |
989 | height -= ml_row->height; | |
990 | else | |
96d2320f | 991 | height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w)); |
97dff879 | 992 | } |
5f5c8ee5 | 993 | |
045dee35 | 994 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
995 | { |
996 | struct glyph_row *hl_row | |
997 | = (w->current_matrix && w->current_matrix->rows | |
998 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
999 | : 0); | |
1000 | if (hl_row && hl_row->mode_line_p) | |
1001 | height -= hl_row->height; | |
1002 | else | |
1003 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
1004 | } | |
5f5c8ee5 | 1005 | |
7c75be36 PJ |
1006 | /* With a very small font and a mode-line that's taller than |
1007 | default, we might end up with a negative height. */ | |
1008 | return max (0, height); | |
5992c4f7 KH |
1009 | } |
1010 | ||
da8b7f4f KS |
1011 | /* Return the window-relative coordinate of the left edge of display |
1012 | area AREA of window W. AREA < 0 means return the left edge of the | |
1013 | whole window, to the right of the left fringe of W. */ | |
1014 | ||
1015 | INLINE int | |
1016 | window_box_left_offset (w, area) | |
1017 | struct window *w; | |
1018 | int area; | |
1019 | { | |
1020 | int x; | |
1021 | ||
1022 | if (w->pseudo_window_p) | |
1023 | return 0; | |
1024 | ||
1025 | x = WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (w); | |
1026 | ||
1027 | if (area == TEXT_AREA) | |
1028 | x += (WINDOW_LEFT_FRINGE_WIDTH (w) | |
1029 | + window_box_width (w, LEFT_MARGIN_AREA)); | |
1030 | else if (area == RIGHT_MARGIN_AREA) | |
1031 | x += (WINDOW_LEFT_FRINGE_WIDTH (w) | |
1032 | + window_box_width (w, LEFT_MARGIN_AREA) | |
1033 | + window_box_width (w, TEXT_AREA) | |
1034 | + (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
1035 | ? 0 | |
1036 | : WINDOW_RIGHT_FRINGE_WIDTH (w))); | |
1037 | else if (area == LEFT_MARGIN_AREA | |
1038 | && WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)) | |
1039 | x += WINDOW_LEFT_FRINGE_WIDTH (w); | |
1040 | ||
1041 | return x; | |
1042 | } | |
1043 | ||
1044 | ||
1045 | /* Return the window-relative coordinate of the right edge of display | |
1046 | area AREA of window W. AREA < 0 means return the left edge of the | |
1047 | whole window, to the left of the right fringe of W. */ | |
1048 | ||
1049 | INLINE int | |
1050 | window_box_right_offset (w, area) | |
1051 | struct window *w; | |
1052 | int area; | |
1053 | { | |
1054 | return window_box_left_offset (w, area) + window_box_width (w, area); | |
1055 | } | |
5992c4f7 | 1056 | |
5f5c8ee5 GM |
1057 | /* Return the frame-relative coordinate of the left edge of display |
1058 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 1059 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 1060 | |
5f5c8ee5 GM |
1061 | INLINE int |
1062 | window_box_left (w, area) | |
1063 | struct window *w; | |
1064 | int area; | |
90adcf20 | 1065 | { |
5f5c8ee5 | 1066 | struct frame *f = XFRAME (w->frame); |
da8b7f4f | 1067 | int x; |
a3788d53 | 1068 | |
da8b7f4f KS |
1069 | if (w->pseudo_window_p) |
1070 | return FRAME_INTERNAL_BORDER_WIDTH (f); | |
2311178e | 1071 | |
da8b7f4f KS |
1072 | x = (WINDOW_LEFT_EDGE_X (w) |
1073 | + window_box_left_offset (w, area)); | |
73af359d | 1074 | |
5f5c8ee5 | 1075 | return x; |
2311178e | 1076 | } |
90adcf20 | 1077 | |
b6436d4e | 1078 | |
5f5c8ee5 GM |
1079 | /* Return the frame-relative coordinate of the right edge of display |
1080 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 1081 | whole window, to the left of the right fringe of W. */ |
ded34426 | 1082 | |
5f5c8ee5 GM |
1083 | INLINE int |
1084 | window_box_right (w, area) | |
1085 | struct window *w; | |
1086 | int area; | |
1087 | { | |
1088 | return window_box_left (w, area) + window_box_width (w, area); | |
2311178e TTN |
1089 | } |
1090 | ||
5f5c8ee5 GM |
1091 | /* Get the bounding box of the display area AREA of window W, without |
1092 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 1093 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
1094 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
1095 | coordinates of the upper-left corner of the box. Return in | |
1096 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
1097 | ||
1098 | INLINE void | |
1099 | window_box (w, area, box_x, box_y, box_width, box_height) | |
1100 | struct window *w; | |
1101 | int area; | |
1102 | int *box_x, *box_y, *box_width, *box_height; | |
1103 | { | |
da8b7f4f KS |
1104 | if (box_width) |
1105 | *box_width = window_box_width (w, area); | |
1106 | if (box_height) | |
1107 | *box_height = window_box_height (w); | |
1108 | if (box_x) | |
1109 | *box_x = window_box_left (w, area); | |
1110 | if (box_y) | |
1111 | { | |
1112 | *box_y = WINDOW_TOP_EDGE_Y (w); | |
1113 | if (WINDOW_WANTS_HEADER_LINE_P (w)) | |
1114 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
1115 | } | |
ded34426 | 1116 | } |
1adc55de | 1117 | |
1adc55de | 1118 | |
5f5c8ee5 | 1119 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
1120 | mode lines. AREA < 0 means the whole window, not including the |
1121 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
1122 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
1123 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
1124 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
1125 | box. */ | |
ded34426 | 1126 | |
5f5c8ee5 GM |
1127 | INLINE void |
1128 | window_box_edges (w, area, top_left_x, top_left_y, | |
1129 | bottom_right_x, bottom_right_y) | |
1130 | struct window *w; | |
1131 | int area; | |
1132 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 1133 | { |
5f5c8ee5 GM |
1134 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
1135 | bottom_right_y); | |
1136 | *bottom_right_x += *top_left_x; | |
1137 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
1138 | } |
1139 | ||
5f5c8ee5 GM |
1140 | |
1141 | \f | |
1142 | /*********************************************************************** | |
1143 | Utilities | |
1144 | ***********************************************************************/ | |
1145 | ||
8b6ea97f GM |
1146 | /* Return the bottom y-position of the line the iterator IT is in. |
1147 | This can modify IT's settings. */ | |
1148 | ||
1149 | int | |
1150 | line_bottom_y (it) | |
1151 | struct it *it; | |
1152 | { | |
1153 | int line_height = it->max_ascent + it->max_descent; | |
1154 | int line_top_y = it->current_y; | |
2311178e | 1155 | |
8b6ea97f GM |
1156 | if (line_height == 0) |
1157 | { | |
1158 | if (last_height) | |
1159 | line_height = last_height; | |
1160 | else if (IT_CHARPOS (*it) < ZV) | |
1161 | { | |
1162 | move_it_by_lines (it, 1, 1); | |
1163 | line_height = (it->max_ascent || it->max_descent | |
1164 | ? it->max_ascent + it->max_descent | |
1165 | : last_height); | |
1166 | } | |
1167 | else | |
1168 | { | |
1169 | struct glyph_row *row = it->glyph_row; | |
2311178e | 1170 | |
8b6ea97f GM |
1171 | /* Use the default character height. */ |
1172 | it->glyph_row = NULL; | |
1173 | it->what = IT_CHARACTER; | |
1174 | it->c = ' '; | |
1175 | it->len = 1; | |
1176 | PRODUCE_GLYPHS (it); | |
1177 | line_height = it->ascent + it->descent; | |
1178 | it->glyph_row = row; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | return line_top_y + line_height; | |
1183 | } | |
1184 | ||
1185 | ||
0db95684 GM |
1186 | /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to |
1187 | 1 if POS is visible and the line containing POS is fully visible. | |
1188 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line | |
1189 | and header-lines heights. */ | |
3a641a69 GM |
1190 | |
1191 | int | |
04612a64 | 1192 | pos_visible_p (w, charpos, fully, exact_mode_line_heights_p) |
3a641a69 | 1193 | struct window *w; |
04612a64 | 1194 | int charpos, *fully, exact_mode_line_heights_p; |
3a641a69 GM |
1195 | { |
1196 | struct it it; | |
1197 | struct text_pos top; | |
fcab1954 GM |
1198 | int visible_p; |
1199 | struct buffer *old_buffer = NULL; | |
1200 | ||
1201 | if (XBUFFER (w->buffer) != current_buffer) | |
1202 | { | |
1203 | old_buffer = current_buffer; | |
1204 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1205 | } | |
3a641a69 GM |
1206 | |
1207 | *fully = visible_p = 0; | |
1208 | SET_TEXT_POS_FROM_MARKER (top, w->start); | |
2311178e | 1209 | |
04612a64 GM |
1210 | /* Compute exact mode line heights, if requested. */ |
1211 | if (exact_mode_line_heights_p) | |
1212 | { | |
1213 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1214 | current_mode_line_height | |
96d2320f | 1215 | = display_mode_line (w, CURRENT_MODE_LINE_FACE_ID (w), |
04612a64 | 1216 | current_buffer->mode_line_format); |
2311178e | 1217 | |
04612a64 GM |
1218 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
1219 | current_header_line_height | |
1220 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1221 | current_buffer->header_line_format); | |
1222 | } | |
3a641a69 | 1223 | |
04612a64 | 1224 | start_display (&it, w, top); |
3a641a69 GM |
1225 | move_it_to (&it, charpos, 0, it.last_visible_y, -1, |
1226 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
a13be207 GM |
1227 | |
1228 | /* Note that we may overshoot because of invisible text. */ | |
1229 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1230 | { |
8b6ea97f GM |
1231 | int top_y = it.current_y; |
1232 | int bottom_y = line_bottom_y (&it); | |
da8b7f4f | 1233 | int window_top_y = WINDOW_HEADER_LINE_HEIGHT (w); |
2311178e | 1234 | |
8b6ea97f GM |
1235 | if (top_y < window_top_y) |
1236 | visible_p = bottom_y > window_top_y; | |
1237 | else if (top_y < it.last_visible_y) | |
fcab1954 GM |
1238 | { |
1239 | visible_p = 1; | |
8b6ea97f | 1240 | *fully = bottom_y <= it.last_visible_y; |
fcab1954 | 1241 | } |
3a641a69 GM |
1242 | } |
1243 | else if (it.current_y + it.max_ascent + it.max_descent > it.last_visible_y) | |
1244 | { | |
1245 | move_it_by_lines (&it, 1, 0); | |
1246 | if (charpos < IT_CHARPOS (it)) | |
1247 | { | |
1248 | visible_p = 1; | |
1249 | *fully = 0; | |
1250 | } | |
1251 | } | |
fcab1954 GM |
1252 | |
1253 | if (old_buffer) | |
1254 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1255 | |
1256 | current_header_line_height = current_mode_line_height = -1; | |
3a641a69 GM |
1257 | return visible_p; |
1258 | } | |
1259 | ||
1260 | ||
4fdb80f2 GM |
1261 | /* Return the next character from STR which is MAXLEN bytes long. |
1262 | Return in *LEN the length of the character. This is like | |
1263 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1264 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1265 | character. */ |
1266 | ||
1267 | static INLINE int | |
7a5b8a93 | 1268 | string_char_and_length (str, maxlen, len) |
50f80c2f | 1269 | const unsigned char *str; |
7a5b8a93 | 1270 | int maxlen, *len; |
4fdb80f2 GM |
1271 | { |
1272 | int c; | |
1273 | ||
1274 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1275 | if (!CHAR_VALID_P (c, 1)) | |
1276 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1277 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1278 | characters. */ |
1279 | c = '?'; | |
1280 | ||
1281 | return c; | |
1282 | } | |
1283 | ||
1284 | ||
1285 | ||
5f5c8ee5 GM |
1286 | /* Given a position POS containing a valid character and byte position |
1287 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1288 | ||
1289 | static struct text_pos | |
1290 | string_pos_nchars_ahead (pos, string, nchars) | |
1291 | struct text_pos pos; | |
1292 | Lisp_Object string; | |
1293 | int nchars; | |
0b1005ef | 1294 | { |
5f5c8ee5 GM |
1295 | xassert (STRINGP (string) && nchars >= 0); |
1296 | ||
1297 | if (STRING_MULTIBYTE (string)) | |
1298 | { | |
2051c264 | 1299 | int rest = SBYTES (string) - BYTEPOS (pos); |
50f80c2f | 1300 | const unsigned char *p = SDATA (string) + BYTEPOS (pos); |
5f5c8ee5 GM |
1301 | int len; |
1302 | ||
1303 | while (nchars--) | |
1304 | { | |
4fdb80f2 | 1305 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1306 | p += len, rest -= len; |
1307 | xassert (rest >= 0); | |
1308 | CHARPOS (pos) += 1; | |
1309 | BYTEPOS (pos) += len; | |
1310 | } | |
1311 | } | |
1312 | else | |
1313 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1314 | ||
1315 | return pos; | |
0a9dc68b RS |
1316 | } |
1317 | ||
0a9dc68b | 1318 | |
5f5c8ee5 GM |
1319 | /* Value is the text position, i.e. character and byte position, |
1320 | for character position CHARPOS in STRING. */ | |
1321 | ||
1322 | static INLINE struct text_pos | |
1323 | string_pos (charpos, string) | |
1324 | int charpos; | |
0a9dc68b | 1325 | Lisp_Object string; |
0a9dc68b | 1326 | { |
5f5c8ee5 GM |
1327 | struct text_pos pos; |
1328 | xassert (STRINGP (string)); | |
1329 | xassert (charpos >= 0); | |
1330 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1331 | return pos; | |
1332 | } | |
1333 | ||
1334 | ||
1335 | /* Value is a text position, i.e. character and byte position, for | |
1336 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1337 | means recognize multibyte characters. */ | |
1338 | ||
1339 | static struct text_pos | |
1340 | c_string_pos (charpos, s, multibyte_p) | |
1341 | int charpos; | |
1342 | unsigned char *s; | |
1343 | int multibyte_p; | |
1344 | { | |
1345 | struct text_pos pos; | |
1346 | ||
1347 | xassert (s != NULL); | |
1348 | xassert (charpos >= 0); | |
1349 | ||
1350 | if (multibyte_p) | |
0a9dc68b | 1351 | { |
5f5c8ee5 GM |
1352 | int rest = strlen (s), len; |
1353 | ||
1354 | SET_TEXT_POS (pos, 0, 0); | |
1355 | while (charpos--) | |
0a9dc68b | 1356 | { |
4fdb80f2 | 1357 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1358 | s += len, rest -= len; |
1359 | xassert (rest >= 0); | |
1360 | CHARPOS (pos) += 1; | |
1361 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1362 | } |
1363 | } | |
5f5c8ee5 GM |
1364 | else |
1365 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1366 | |
5f5c8ee5 GM |
1367 | return pos; |
1368 | } | |
0a9dc68b | 1369 | |
0a9dc68b | 1370 | |
5f5c8ee5 GM |
1371 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1372 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1373 | |
5f5c8ee5 GM |
1374 | static int |
1375 | number_of_chars (s, multibyte_p) | |
1376 | unsigned char *s; | |
1377 | int multibyte_p; | |
1378 | { | |
1379 | int nchars; | |
2311178e | 1380 | |
5f5c8ee5 GM |
1381 | if (multibyte_p) |
1382 | { | |
1383 | int rest = strlen (s), len; | |
1384 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1385 | |
5f5c8ee5 GM |
1386 | for (nchars = 0; rest > 0; ++nchars) |
1387 | { | |
4fdb80f2 | 1388 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1389 | rest -= len, p += len; |
0a9dc68b RS |
1390 | } |
1391 | } | |
5f5c8ee5 GM |
1392 | else |
1393 | nchars = strlen (s); | |
1394 | ||
1395 | return nchars; | |
0b1005ef KH |
1396 | } |
1397 | ||
2311178e | 1398 | |
5f5c8ee5 GM |
1399 | /* Compute byte position NEWPOS->bytepos corresponding to |
1400 | NEWPOS->charpos. POS is a known position in string STRING. | |
1401 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1402 | |
5f5c8ee5 GM |
1403 | static void |
1404 | compute_string_pos (newpos, pos, string) | |
1405 | struct text_pos *newpos, pos; | |
1406 | Lisp_Object string; | |
76412d64 | 1407 | { |
5f5c8ee5 GM |
1408 | xassert (STRINGP (string)); |
1409 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
2311178e | 1410 | |
5f5c8ee5 | 1411 | if (STRING_MULTIBYTE (string)) |
6fc556fd KR |
1412 | *newpos = string_pos_nchars_ahead (pos, string, |
1413 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1414 | else |
1415 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1416 | } |
1417 | ||
fa3c6b4d KS |
1418 | /* EXPORT: |
1419 | Return an estimation of the pixel height of mode or top lines on | |
1420 | frame F. FACE_ID specifies what line's height to estimate. */ | |
1421 | ||
1422 | int | |
1423 | estimate_mode_line_height (f, face_id) | |
1424 | struct frame *f; | |
1425 | enum face_id face_id; | |
1426 | { | |
1427 | #ifdef HAVE_WINDOW_SYSTEM | |
1428 | if (FRAME_WINDOW_P (f)) | |
1429 | { | |
1430 | int height = FONT_HEIGHT (FRAME_FONT (f)); | |
1431 | ||
1432 | /* This function is called so early when Emacs starts that the face | |
1433 | cache and mode line face are not yet initialized. */ | |
1434 | if (FRAME_FACE_CACHE (f)) | |
1435 | { | |
1436 | struct face *face = FACE_FROM_ID (f, face_id); | |
1437 | if (face) | |
1438 | { | |
1439 | if (face->font) | |
1440 | height = FONT_HEIGHT (face->font); | |
1441 | if (face->box_line_width > 0) | |
1442 | height += 2 * face->box_line_width; | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | return height; | |
1447 | } | |
1448 | #endif | |
1449 | ||
1450 | return 1; | |
1451 | } | |
1452 | ||
e080d3eb KS |
1453 | /* Given a pixel position (PIX_X, PIX_Y) on frame F, return glyph |
1454 | co-ordinates in (*X, *Y). Set *BOUNDS to the rectangle that the | |
1455 | glyph at X, Y occupies, if BOUNDS != 0. If NOCLIP is non-zero, do | |
1456 | not force the value into range. */ | |
1457 | ||
1458 | void | |
1459 | pixel_to_glyph_coords (f, pix_x, pix_y, x, y, bounds, noclip) | |
1460 | FRAME_PTR f; | |
1461 | register int pix_x, pix_y; | |
1462 | int *x, *y; | |
1463 | NativeRectangle *bounds; | |
1464 | int noclip; | |
1465 | { | |
1466 | ||
1467 | #ifdef HAVE_WINDOW_SYSTEM | |
1468 | if (FRAME_WINDOW_P (f)) | |
1469 | { | |
da8b7f4f | 1470 | /* Arrange for the division in FRAME_PIXEL_X_TO_COL etc. to round down |
e080d3eb KS |
1471 | even for negative values. */ |
1472 | if (pix_x < 0) | |
da8b7f4f | 1473 | pix_x -= FRAME_COLUMN_WIDTH (f) - 1; |
e080d3eb | 1474 | if (pix_y < 0) |
da8b7f4f | 1475 | pix_y -= FRAME_LINE_HEIGHT (f) - 1; |
e080d3eb | 1476 | |
da8b7f4f KS |
1477 | pix_x = FRAME_PIXEL_X_TO_COL (f, pix_x); |
1478 | pix_y = FRAME_PIXEL_Y_TO_LINE (f, pix_y); | |
e080d3eb KS |
1479 | |
1480 | if (bounds) | |
1481 | STORE_NATIVE_RECT (*bounds, | |
da8b7f4f KS |
1482 | FRAME_COL_TO_PIXEL_X (f, pix_x), |
1483 | FRAME_LINE_TO_PIXEL_Y (f, pix_y), | |
1484 | FRAME_COLUMN_WIDTH (f) - 1, | |
1485 | FRAME_LINE_HEIGHT (f) - 1); | |
e080d3eb KS |
1486 | |
1487 | if (!noclip) | |
1488 | { | |
1489 | if (pix_x < 0) | |
1490 | pix_x = 0; | |
da8b7f4f KS |
1491 | else if (pix_x > FRAME_TOTAL_COLS (f)) |
1492 | pix_x = FRAME_TOTAL_COLS (f); | |
e080d3eb KS |
1493 | |
1494 | if (pix_y < 0) | |
1495 | pix_y = 0; | |
da8b7f4f KS |
1496 | else if (pix_y > FRAME_LINES (f)) |
1497 | pix_y = FRAME_LINES (f); | |
e080d3eb KS |
1498 | } |
1499 | } | |
1500 | #endif | |
1501 | ||
1502 | *x = pix_x; | |
1503 | *y = pix_y; | |
1504 | } | |
1505 | ||
1506 | ||
1507 | /* Given HPOS/VPOS in the current matrix of W, return corresponding | |
1508 | frame-relative pixel positions in *FRAME_X and *FRAME_Y. If we | |
1509 | can't tell the positions because W's display is not up to date, | |
1510 | return 0. */ | |
1511 | ||
1512 | int | |
1513 | glyph_to_pixel_coords (w, hpos, vpos, frame_x, frame_y) | |
1514 | struct window *w; | |
1515 | int hpos, vpos; | |
1516 | int *frame_x, *frame_y; | |
1517 | { | |
1518 | #ifdef HAVE_WINDOW_SYSTEM | |
1519 | if (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))) | |
1520 | { | |
1521 | int success_p; | |
1522 | ||
1523 | xassert (hpos >= 0 && hpos < w->current_matrix->matrix_w); | |
1524 | xassert (vpos >= 0 && vpos < w->current_matrix->matrix_h); | |
1525 | ||
1526 | if (display_completed) | |
1527 | { | |
1528 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, vpos); | |
1529 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
1530 | struct glyph *end = glyph + min (hpos, row->used[TEXT_AREA]); | |
1531 | ||
1532 | hpos = row->x; | |
1533 | vpos = row->y; | |
1534 | while (glyph < end) | |
1535 | { | |
1536 | hpos += glyph->pixel_width; | |
1537 | ++glyph; | |
1538 | } | |
1539 | ||
1540 | success_p = 1; | |
1541 | } | |
1542 | else | |
1543 | { | |
1544 | hpos = vpos = 0; | |
1545 | success_p = 0; | |
1546 | } | |
1547 | ||
1548 | *frame_x = WINDOW_TO_FRAME_PIXEL_X (w, hpos); | |
1549 | *frame_y = WINDOW_TO_FRAME_PIXEL_Y (w, vpos); | |
1550 | return success_p; | |
1551 | } | |
1552 | #endif | |
1553 | ||
1554 | *frame_x = hpos; | |
1555 | *frame_y = vpos; | |
1556 | return 1; | |
1557 | } | |
1558 | ||
1559 | ||
fa3c6b4d KS |
1560 | #ifdef HAVE_WINDOW_SYSTEM |
1561 | ||
1562 | /* Find the glyph under window-relative coordinates X/Y in window W. | |
1563 | Consider only glyphs from buffer text, i.e. no glyphs from overlay | |
1564 | strings. Return in *HPOS and *VPOS the row and column number of | |
1565 | the glyph found. Return in *AREA the glyph area containing X. | |
1566 | Value is a pointer to the glyph found or null if X/Y is not on | |
1567 | text, or we can't tell because W's current matrix is not up to | |
1568 | date. */ | |
1569 | ||
1570 | static struct glyph * | |
1571 | x_y_to_hpos_vpos (w, x, y, hpos, vpos, area, buffer_only_p) | |
1572 | struct window *w; | |
1573 | int x, y; | |
1574 | int *hpos, *vpos, *area; | |
1575 | int buffer_only_p; | |
1576 | { | |
1577 | struct glyph *glyph, *end; | |
1578 | struct glyph_row *row = NULL; | |
da8b7f4f | 1579 | int x0, i; |
fa3c6b4d KS |
1580 | |
1581 | /* Find row containing Y. Give up if some row is not enabled. */ | |
1582 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
1583 | { | |
1584 | row = MATRIX_ROW (w->current_matrix, i); | |
1585 | if (!row->enabled_p) | |
1586 | return NULL; | |
1587 | if (y >= row->y && y < MATRIX_ROW_BOTTOM_Y (row)) | |
1588 | break; | |
1589 | } | |
1590 | ||
1591 | *vpos = i; | |
1592 | *hpos = 0; | |
1593 | ||
1594 | /* Give up if Y is not in the window. */ | |
1595 | if (i == w->current_matrix->nrows) | |
1596 | return NULL; | |
1597 | ||
1598 | /* Get the glyph area containing X. */ | |
1599 | if (w->pseudo_window_p) | |
1600 | { | |
1601 | *area = TEXT_AREA; | |
1602 | x0 = 0; | |
1603 | } | |
1604 | else | |
1605 | { | |
da8b7f4f | 1606 | if (x < window_box_left_offset (w, TEXT_AREA)) |
fa3c6b4d KS |
1607 | { |
1608 | *area = LEFT_MARGIN_AREA; | |
da8b7f4f | 1609 | x0 = window_box_left_offset (w, LEFT_MARGIN_AREA); |
fa3c6b4d | 1610 | } |
da8b7f4f | 1611 | else if (x < window_box_right_offset (w, TEXT_AREA)) |
fa3c6b4d KS |
1612 | { |
1613 | *area = TEXT_AREA; | |
da8b7f4f | 1614 | x0 = window_box_left_offset (w, TEXT_AREA); |
fa3c6b4d KS |
1615 | } |
1616 | else | |
1617 | { | |
1618 | *area = RIGHT_MARGIN_AREA; | |
da8b7f4f | 1619 | x0 = window_box_left_offset (w, RIGHT_MARGIN_AREA); |
fa3c6b4d KS |
1620 | } |
1621 | } | |
1622 | ||
1623 | /* Find glyph containing X. */ | |
1624 | glyph = row->glyphs[*area]; | |
1625 | end = glyph + row->used[*area]; | |
1626 | while (glyph < end) | |
1627 | { | |
1628 | if (x < x0 + glyph->pixel_width) | |
1629 | { | |
1630 | if (w->pseudo_window_p) | |
1631 | break; | |
1632 | else if (!buffer_only_p || BUFFERP (glyph->object)) | |
1633 | break; | |
1634 | } | |
1635 | ||
1636 | x0 += glyph->pixel_width; | |
1637 | ++glyph; | |
1638 | } | |
1639 | ||
1640 | if (glyph == end) | |
1641 | return NULL; | |
1642 | ||
1643 | *hpos = glyph - row->glyphs[*area]; | |
1644 | return glyph; | |
1645 | } | |
1646 | ||
1647 | ||
1648 | /* EXPORT: | |
1649 | Convert frame-relative x/y to coordinates relative to window W. | |
1650 | Takes pseudo-windows into account. */ | |
1651 | ||
1652 | void | |
1653 | frame_to_window_pixel_xy (w, x, y) | |
1654 | struct window *w; | |
1655 | int *x, *y; | |
1656 | { | |
1657 | if (w->pseudo_window_p) | |
1658 | { | |
1659 | /* A pseudo-window is always full-width, and starts at the | |
1660 | left edge of the frame, plus a frame border. */ | |
1661 | struct frame *f = XFRAME (w->frame); | |
da8b7f4f | 1662 | *x -= FRAME_INTERNAL_BORDER_WIDTH (f); |
fa3c6b4d KS |
1663 | *y = FRAME_TO_WINDOW_PIXEL_Y (w, *y); |
1664 | } | |
1665 | else | |
1666 | { | |
da8b7f4f | 1667 | *x -= WINDOW_LEFT_EDGE_X (w); |
fa3c6b4d KS |
1668 | *y = FRAME_TO_WINDOW_PIXEL_Y (w, *y); |
1669 | } | |
1670 | } | |
1671 | ||
1672 | /* EXPORT: | |
1673 | Return in *R the clipping rectangle for glyph string S. */ | |
1674 | ||
1675 | void | |
1676 | get_glyph_string_clip_rect (s, nr) | |
1677 | struct glyph_string *s; | |
1678 | NativeRectangle *nr; | |
1679 | { | |
1680 | XRectangle r; | |
1681 | ||
1682 | if (s->row->full_width_p) | |
1683 | { | |
da8b7f4f KS |
1684 | /* Draw full-width. X coordinates are relative to S->w->left_col. */ |
1685 | r.x = WINDOW_LEFT_EDGE_X (s->w); | |
1686 | r.width = WINDOW_TOTAL_WIDTH (s->w); | |
fa3c6b4d KS |
1687 | |
1688 | /* Unless displaying a mode or menu bar line, which are always | |
1689 | fully visible, clip to the visible part of the row. */ | |
1690 | if (s->w->pseudo_window_p) | |
1691 | r.height = s->row->visible_height; | |
1692 | else | |
1693 | r.height = s->height; | |
1694 | } | |
1695 | else | |
1696 | { | |
1697 | /* This is a text line that may be partially visible. */ | |
da8b7f4f | 1698 | r.x = window_box_left (s->w, s->area); |
fa3c6b4d KS |
1699 | r.width = window_box_width (s->w, s->area); |
1700 | r.height = s->row->visible_height; | |
1701 | } | |
1702 | ||
1703 | /* If S draws overlapping rows, it's sufficient to use the top and | |
1704 | bottom of the window for clipping because this glyph string | |
1705 | intentionally draws over other lines. */ | |
1706 | if (s->for_overlaps_p) | |
1707 | { | |
da8b7f4f | 1708 | r.y = WINDOW_HEADER_LINE_HEIGHT (s->w); |
fa3c6b4d KS |
1709 | r.height = window_text_bottom_y (s->w) - r.y; |
1710 | } | |
1711 | else | |
1712 | { | |
1713 | /* Don't use S->y for clipping because it doesn't take partially | |
1714 | visible lines into account. For example, it can be negative for | |
1715 | partially visible lines at the top of a window. */ | |
1716 | if (!s->row->full_width_p | |
1717 | && MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (s->w, s->row)) | |
da8b7f4f | 1718 | r.y = WINDOW_HEADER_LINE_HEIGHT (s->w); |
fa3c6b4d KS |
1719 | else |
1720 | r.y = max (0, s->row->y); | |
1721 | ||
1722 | /* If drawing a tool-bar window, draw it over the internal border | |
1723 | at the top of the window. */ | |
1724 | if (s->w == XWINDOW (s->f->tool_bar_window)) | |
b4ebbb12 | 1725 | r.y -= FRAME_INTERNAL_BORDER_WIDTH (s->f); |
fa3c6b4d KS |
1726 | } |
1727 | ||
1728 | r.y = WINDOW_TO_FRAME_PIXEL_Y (s->w, r.y); | |
1729 | ||
1730 | #ifdef HAVE_NTGUI | |
1731 | /* ++KFS: From W32 port, but it looks ok for all platforms to me. */ | |
1732 | /* If drawing the cursor, don't let glyph draw outside its | |
1733 | advertised boundaries. Cleartype does this under some circumstances. */ | |
1734 | if (s->hl == DRAW_CURSOR) | |
1735 | { | |
1736 | if (s->x > r.x) | |
1737 | { | |
1738 | r.width -= s->x - r.x; | |
1739 | r.x = s->x; | |
1740 | } | |
1741 | r.width = min (r.width, s->first_glyph->pixel_width); | |
1742 | } | |
1743 | #endif | |
1744 | ||
1745 | #ifdef CONVERT_FROM_XRECT | |
1746 | CONVERT_FROM_XRECT (r, *nr); | |
1747 | #else | |
1748 | *nr = r; | |
fd4c9408 | 1749 | #endif |
fa3c6b4d KS |
1750 | } |
1751 | ||
1752 | #endif /* HAVE_WINDOW_SYSTEM */ | |
9c74a0dd | 1753 | |
5f5c8ee5 GM |
1754 | \f |
1755 | /*********************************************************************** | |
1756 | Lisp form evaluation | |
1757 | ***********************************************************************/ | |
1758 | ||
116d6f5c | 1759 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
1760 | |
1761 | static Lisp_Object | |
116d6f5c | 1762 | safe_eval_handler (arg) |
5f5c8ee5 GM |
1763 | Lisp_Object arg; |
1764 | { | |
0dbf9fd2 | 1765 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
1766 | return Qnil; |
1767 | } | |
1768 | ||
1769 | ||
1770 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 1771 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 1772 | |
71e5b1b8 | 1773 | Lisp_Object |
116d6f5c | 1774 | safe_eval (sexpr) |
5f5c8ee5 GM |
1775 | Lisp_Object sexpr; |
1776 | { | |
5f5c8ee5 | 1777 | Lisp_Object val; |
2311178e | 1778 | |
30a3f61c GM |
1779 | if (inhibit_eval_during_redisplay) |
1780 | val = Qnil; | |
1781 | else | |
1782 | { | |
331379bf | 1783 | int count = SPECPDL_INDEX (); |
30a3f61c | 1784 | struct gcpro gcpro1; |
0d8b31c0 | 1785 | |
30a3f61c GM |
1786 | GCPRO1 (sexpr); |
1787 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1788 | /* Use Qt to ensure debugger does not run, |
1789 | so there is no possibility of wanting to redisplay. */ | |
1790 | val = internal_condition_case_1 (Feval, sexpr, Qt, | |
30a3f61c GM |
1791 | safe_eval_handler); |
1792 | UNGCPRO; | |
1793 | val = unbind_to (count, val); | |
1794 | } | |
2311178e | 1795 | |
30a3f61c | 1796 | return val; |
0d8b31c0 GM |
1797 | } |
1798 | ||
1799 | ||
1800 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
1801 | Return the result, or nil if something went wrong. Prevent |
1802 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
1803 | |
1804 | Lisp_Object | |
116d6f5c | 1805 | safe_call (nargs, args) |
0d8b31c0 GM |
1806 | int nargs; |
1807 | Lisp_Object *args; | |
1808 | { | |
0d8b31c0 | 1809 | Lisp_Object val; |
2311178e | 1810 | |
30a3f61c GM |
1811 | if (inhibit_eval_during_redisplay) |
1812 | val = Qnil; | |
1813 | else | |
1814 | { | |
331379bf | 1815 | int count = SPECPDL_INDEX (); |
30a3f61c | 1816 | struct gcpro gcpro1; |
0d8b31c0 | 1817 | |
30a3f61c GM |
1818 | GCPRO1 (args[0]); |
1819 | gcpro1.nvars = nargs; | |
1820 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1821 | /* Use Qt to ensure debugger does not run, |
1822 | so there is no possibility of wanting to redisplay. */ | |
1823 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qt, | |
30a3f61c GM |
1824 | safe_eval_handler); |
1825 | UNGCPRO; | |
1826 | val = unbind_to (count, val); | |
1827 | } | |
1828 | ||
1829 | return val; | |
5f5c8ee5 GM |
1830 | } |
1831 | ||
1832 | ||
116d6f5c GM |
1833 | /* Call function FN with one argument ARG. |
1834 | Return the result, or nil if something went wrong. */ | |
1835 | ||
1836 | Lisp_Object | |
1837 | safe_call1 (fn, arg) | |
1838 | Lisp_Object fn, arg; | |
1839 | { | |
1840 | Lisp_Object args[2]; | |
1841 | args[0] = fn; | |
1842 | args[1] = arg; | |
1843 | return safe_call (2, args); | |
1844 | } | |
1845 | ||
1846 | ||
5f5c8ee5 GM |
1847 | \f |
1848 | /*********************************************************************** | |
1849 | Debugging | |
1850 | ***********************************************************************/ | |
1851 | ||
1852 | #if 0 | |
1853 | ||
1854 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1855 | This is for debugging. It is too slow to do unconditionally. */ | |
1856 | ||
1857 | static void | |
1858 | check_it (it) | |
1859 | struct it *it; | |
1860 | { | |
1861 | if (it->method == next_element_from_string) | |
a2889657 | 1862 | { |
5f5c8ee5 GM |
1863 | xassert (STRINGP (it->string)); |
1864 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1865 | } | |
1866 | else if (it->method == next_element_from_buffer) | |
1867 | { | |
1868 | /* Check that character and byte positions agree. */ | |
1869 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1870 | } | |
73af359d | 1871 | |
5f5c8ee5 GM |
1872 | if (it->dpvec) |
1873 | xassert (it->current.dpvec_index >= 0); | |
1874 | else | |
1875 | xassert (it->current.dpvec_index < 0); | |
1876 | } | |
1f40cad2 | 1877 | |
5f5c8ee5 GM |
1878 | #define CHECK_IT(IT) check_it ((IT)) |
1879 | ||
1880 | #else /* not 0 */ | |
1881 | ||
1882 | #define CHECK_IT(IT) (void) 0 | |
1883 | ||
1884 | #endif /* not 0 */ | |
1885 | ||
1886 | ||
1887 | #if GLYPH_DEBUG | |
1888 | ||
1889 | /* Check that the window end of window W is what we expect it | |
1890 | to be---the last row in the current matrix displaying text. */ | |
1891 | ||
1892 | static void | |
1893 | check_window_end (w) | |
1894 | struct window *w; | |
1895 | { | |
1896 | if (!MINI_WINDOW_P (w) | |
1897 | && !NILP (w->window_end_valid)) | |
1898 | { | |
1899 | struct glyph_row *row; | |
1900 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1901 | XFASTINT (w->window_end_vpos)), | |
1902 | !row->enabled_p | |
1903 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1904 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1909 | ||
1910 | #else /* not GLYPH_DEBUG */ | |
1911 | ||
1912 | #define CHECK_WINDOW_END(W) (void) 0 | |
1913 | ||
1914 | #endif /* not GLYPH_DEBUG */ | |
1915 | ||
1916 | ||
1917 | \f | |
1918 | /*********************************************************************** | |
1919 | Iterator initialization | |
1920 | ***********************************************************************/ | |
1921 | ||
1922 | /* Initialize IT for displaying current_buffer in window W, starting | |
1923 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1924 | position is specified which is useful when the iterator is assigned | |
1925 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 1926 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
1927 | |
1928 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1929 | will produce glyphs in that row. | |
1930 | ||
1931 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
96d2320f KS |
1932 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID, |
1933 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID for displaying | |
1934 | mode lines, or TOOL_BAR_FACE_ID for displaying the tool-bar. | |
2311178e | 1935 | |
96d2320f KS |
1936 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID, |
1937 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID, the iterator | |
1938 | will be initialized to use the corresponding mode line glyph row of | |
1939 | the desired matrix of W. */ | |
5f5c8ee5 GM |
1940 | |
1941 | void | |
1942 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1943 | struct it *it; | |
1944 | struct window *w; | |
1945 | int charpos, bytepos; | |
1946 | struct glyph_row *row; | |
1947 | enum face_id base_face_id; | |
1948 | { | |
1949 | int highlight_region_p; | |
5f5c8ee5 GM |
1950 | |
1951 | /* Some precondition checks. */ | |
1952 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
1953 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
1954 | && charpos <= ZV)); | |
5f5c8ee5 GM |
1955 | |
1956 | /* If face attributes have been changed since the last redisplay, | |
1957 | free realized faces now because they depend on face definitions | |
7d0393cf | 1958 | that might have changed. Don't free faces while there might be |
1987b083 | 1959 | desired matrices pending which reference these faces. */ |
26683087 | 1960 | if (face_change_count && !inhibit_free_realized_faces) |
5f5c8ee5 GM |
1961 | { |
1962 | face_change_count = 0; | |
1963 | free_all_realized_faces (Qnil); | |
1964 | } | |
1965 | ||
1966 | /* Use one of the mode line rows of W's desired matrix if | |
1967 | appropriate. */ | |
1968 | if (row == NULL) | |
1969 | { | |
96d2320f KS |
1970 | if (base_face_id == MODE_LINE_FACE_ID |
1971 | || base_face_id == MODE_LINE_INACTIVE_FACE_ID) | |
5f5c8ee5 | 1972 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); |
045dee35 GM |
1973 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1974 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 | 1975 | } |
2311178e | 1976 | |
5f5c8ee5 GM |
1977 | /* Clear IT. */ |
1978 | bzero (it, sizeof *it); | |
1979 | it->current.overlay_string_index = -1; | |
1980 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1981 | it->base_face_id = base_face_id; |
1982 | ||
1983 | /* The window in which we iterate over current_buffer: */ | |
1984 | XSETWINDOW (it->window, w); | |
1985 | it->w = w; | |
1986 | it->f = XFRAME (w->frame); | |
1987 | ||
d475bcb8 GM |
1988 | /* Extra space between lines (on window systems only). */ |
1989 | if (base_face_id == DEFAULT_FACE_ID | |
1990 | && FRAME_WINDOW_P (it->f)) | |
1991 | { | |
1992 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1993 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1994 | else if (it->f->extra_line_spacing > 0) | |
1995 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1996 | } | |
1997 | ||
5f5c8ee5 | 1998 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
1999 | attribute changes of named faces, recompute them. When running |
2000 | in batch mode, the face cache of Vterminal_frame is null. If | |
2001 | we happen to get called, make a dummy face cache. */ | |
a24d4cb2 | 2002 | if (noninteractive && FRAME_FACE_CACHE (it->f) == NULL) |
62be9979 | 2003 | init_frame_faces (it->f); |
5f5c8ee5 GM |
2004 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
2005 | recompute_basic_faces (it->f); | |
2006 | ||
5f5c8ee5 GM |
2007 | /* Current value of the `space-width', and 'height' properties. */ |
2008 | it->space_width = Qnil; | |
2009 | it->font_height = Qnil; | |
2311178e | 2010 | |
5f5c8ee5 GM |
2011 | /* Are control characters displayed as `^C'? */ |
2012 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
2013 | ||
2014 | /* -1 means everything between a CR and the following line end | |
2015 | is invisible. >0 means lines indented more than this value are | |
2016 | invisible. */ | |
2017 | it->selective = (INTEGERP (current_buffer->selective_display) | |
2018 | ? XFASTINT (current_buffer->selective_display) | |
2311178e | 2019 | : (!NILP (current_buffer->selective_display) |
5f5c8ee5 GM |
2020 | ? -1 : 0)); |
2021 | it->selective_display_ellipsis_p | |
2022 | = !NILP (current_buffer->selective_display_ellipses); | |
2023 | ||
2024 | /* Display table to use. */ | |
2025 | it->dp = window_display_table (w); | |
2026 | ||
2027 | /* Are multibyte characters enabled in current_buffer? */ | |
2028 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
2029 | ||
2030 | /* Non-zero if we should highlight the region. */ | |
2031 | highlight_region_p | |
3ebf0ea9 | 2032 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
2033 | && !NILP (current_buffer->mark_active) |
2034 | && XMARKER (current_buffer->mark)->buffer != 0); | |
2035 | ||
2036 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
2037 | start and end of a visible region in window IT->w. Set both to | |
2038 | -1 to indicate no region. */ | |
2039 | if (highlight_region_p | |
2040 | /* Maybe highlight only in selected window. */ | |
2311178e | 2041 | && (/* Either show region everywhere. */ |
5f5c8ee5 GM |
2042 | highlight_nonselected_windows |
2043 | /* Or show region in the selected window. */ | |
2044 | || w == XWINDOW (selected_window) | |
2045 | /* Or show the region if we are in the mini-buffer and W is | |
2046 | the window the mini-buffer refers to. */ | |
2047 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
5705966b KS |
2048 | && WINDOWP (minibuf_selected_window) |
2049 | && w == XWINDOW (minibuf_selected_window)))) | |
5f5c8ee5 GM |
2050 | { |
2051 | int charpos = marker_position (current_buffer->mark); | |
2052 | it->region_beg_charpos = min (PT, charpos); | |
2053 | it->region_end_charpos = max (PT, charpos); | |
2054 | } | |
2055 | else | |
2056 | it->region_beg_charpos = it->region_end_charpos = -1; | |
2057 | ||
2058 | /* Get the position at which the redisplay_end_trigger hook should | |
2059 | be run, if it is to be run at all. */ | |
2060 | if (MARKERP (w->redisplay_end_trigger) | |
2061 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
2062 | it->redisplay_end_trigger_charpos | |
2063 | = marker_position (w->redisplay_end_trigger); | |
2064 | else if (INTEGERP (w->redisplay_end_trigger)) | |
2065 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
2066 | ||
2067 | /* Correct bogus values of tab_width. */ | |
2068 | it->tab_width = XINT (current_buffer->tab_width); | |
2069 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
2070 | it->tab_width = 8; | |
2071 | ||
2072 | /* Are lines in the display truncated? */ | |
2073 | it->truncate_lines_p | |
2074 | = (base_face_id != DEFAULT_FACE_ID | |
2075 | || XINT (it->w->hscroll) | |
2076 | || (truncate_partial_width_windows | |
2077 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
2078 | || !NILP (current_buffer->truncate_lines)); | |
2079 | ||
2080 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 2081 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
2082 | frames. */ |
2083 | if (!FRAME_WINDOW_P (it->f)) | |
2084 | { | |
2085 | if (it->truncate_lines_p) | |
2086 | { | |
2087 | /* We will need the truncation glyph. */ | |
2088 | xassert (it->glyph_row == NULL); | |
2089 | produce_special_glyphs (it, IT_TRUNCATION); | |
2090 | it->truncation_pixel_width = it->pixel_width; | |
2091 | } | |
2092 | else | |
2093 | { | |
2094 | /* We will need the continuation glyph. */ | |
2095 | xassert (it->glyph_row == NULL); | |
2096 | produce_special_glyphs (it, IT_CONTINUATION); | |
2097 | it->continuation_pixel_width = it->pixel_width; | |
2098 | } | |
2099 | ||
153c2160 | 2100 | /* Reset these values to zero because the produce_special_glyphs |
5f5c8ee5 GM |
2101 | above has changed them. */ |
2102 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 2103 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
2104 | } |
2105 | ||
2106 | /* Set this after getting the dimensions of truncation and | |
2107 | continuation glyphs, so that we don't produce glyphs when calling | |
2108 | produce_special_glyphs, above. */ | |
2109 | it->glyph_row = row; | |
2110 | it->area = TEXT_AREA; | |
2111 | ||
2112 | /* Get the dimensions of the display area. The display area | |
2113 | consists of the visible window area plus a horizontally scrolled | |
2114 | part to the left of the window. All x-values are relative to the | |
2115 | start of this total display area. */ | |
2116 | if (base_face_id != DEFAULT_FACE_ID) | |
2117 | { | |
2118 | /* Mode lines, menu bar in terminal frames. */ | |
2119 | it->first_visible_x = 0; | |
da8b7f4f | 2120 | it->last_visible_x = WINDOW_TOTAL_WIDTH (w); |
5f5c8ee5 GM |
2121 | } |
2122 | else | |
2123 | { | |
2124 | it->first_visible_x | |
da8b7f4f | 2125 | = XFASTINT (it->w->hscroll) * FRAME_COLUMN_WIDTH (it->f); |
5f5c8ee5 GM |
2126 | it->last_visible_x = (it->first_visible_x |
2127 | + window_box_width (w, TEXT_AREA)); | |
2128 | ||
2129 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
2130 | the right margin. Otherwise, leave room for the continuation | |
2131 | glyph(s). Truncation and continuation glyphs are not inserted | |
2132 | for window-based redisplay. */ | |
2133 | if (!FRAME_WINDOW_P (it->f)) | |
2134 | { | |
2135 | if (it->truncate_lines_p) | |
2136 | it->last_visible_x -= it->truncation_pixel_width; | |
2137 | else | |
2138 | it->last_visible_x -= it->continuation_pixel_width; | |
2139 | } | |
2140 | ||
045dee35 | 2141 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
da8b7f4f | 2142 | it->current_y = WINDOW_HEADER_LINE_HEIGHT (w) + w->vscroll; |
5f5c8ee5 GM |
2143 | } |
2144 | ||
2145 | /* Leave room for a border glyph. */ | |
2146 | if (!FRAME_WINDOW_P (it->f) | |
2147 | && !WINDOW_RIGHTMOST_P (it->w)) | |
2148 | it->last_visible_x -= 1; | |
2149 | ||
2150 | it->last_visible_y = window_text_bottom_y (w); | |
2151 | ||
2152 | /* For mode lines and alike, arrange for the first glyph having a | |
2153 | left box line if the face specifies a box. */ | |
2154 | if (base_face_id != DEFAULT_FACE_ID) | |
2155 | { | |
2156 | struct face *face; | |
2311178e | 2157 | |
5f5c8ee5 GM |
2158 | it->face_id = base_face_id; |
2159 | ||
2160 | /* If we have a boxed mode line, make the first character appear | |
2161 | with a left box line. */ | |
2162 | face = FACE_FROM_ID (it->f, base_face_id); | |
2163 | if (face->box != FACE_NO_BOX) | |
2164 | it->start_of_box_run_p = 1; | |
2165 | } | |
2166 | ||
2167 | /* If a buffer position was specified, set the iterator there, | |
2168 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 2169 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
2170 | { |
2171 | it->end_charpos = ZV; | |
2172 | it->face_id = -1; | |
2173 | IT_CHARPOS (*it) = charpos; | |
2311178e | 2174 | |
5f5c8ee5 | 2175 | /* Compute byte position if not specified. */ |
3ebf0ea9 | 2176 | if (bytepos < charpos) |
5f5c8ee5 GM |
2177 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
2178 | else | |
2179 | IT_BYTEPOS (*it) = bytepos; | |
2180 | ||
2181 | /* Compute faces etc. */ | |
2182 | reseat (it, it->current.pos, 1); | |
2183 | } | |
2311178e | 2184 | |
5f5c8ee5 GM |
2185 | CHECK_IT (it); |
2186 | } | |
2187 | ||
2188 | ||
2189 | /* Initialize IT for the display of window W with window start POS. */ | |
2190 | ||
2191 | void | |
2192 | start_display (it, w, pos) | |
2193 | struct it *it; | |
2194 | struct window *w; | |
2195 | struct text_pos pos; | |
2196 | { | |
5f5c8ee5 | 2197 | struct glyph_row *row; |
045dee35 | 2198 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
2199 | |
2200 | row = w->desired_matrix->rows + first_vpos; | |
2201 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
17fdcfc8 GM |
2202 | |
2203 | if (!it->truncate_lines_p) | |
5f5c8ee5 | 2204 | { |
17fdcfc8 GM |
2205 | int start_at_line_beg_p; |
2206 | int first_y = it->current_y; | |
2311178e | 2207 | |
17fdcfc8 GM |
2208 | /* If window start is not at a line start, skip forward to POS to |
2209 | get the correct continuation lines width. */ | |
2210 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
2211 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
2212 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 2213 | { |
0e47bbf7 RS |
2214 | int new_x; |
2215 | ||
17fdcfc8 GM |
2216 | reseat_at_previous_visible_line_start (it); |
2217 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
2218 | ||
0e47bbf7 RS |
2219 | new_x = it->current_x + it->pixel_width; |
2220 | ||
17fdcfc8 GM |
2221 | /* If lines are continued, this line may end in the middle |
2222 | of a multi-glyph character (e.g. a control character | |
2223 | displayed as \003, or in the middle of an overlay | |
2224 | string). In this case move_it_to above will not have | |
2225 | taken us to the start of the continuation line but to the | |
2226 | end of the continued line. */ | |
0e47bbf7 RS |
2227 | if (it->current_x > 0 |
2228 | && !it->truncate_lines_p /* Lines are continued. */ | |
2229 | && (/* And glyph doesn't fit on the line. */ | |
2230 | new_x > it->last_visible_x | |
2231 | /* Or it fits exactly and we're on a window | |
2232 | system frame. */ | |
2233 | || (new_x == it->last_visible_x | |
2234 | && FRAME_WINDOW_P (it->f)))) | |
5f5c8ee5 | 2235 | { |
b28cb6ed GM |
2236 | if (it->current.dpvec_index >= 0 |
2237 | || it->current.overlay_string_index >= 0) | |
2238 | { | |
cafafe0b | 2239 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
2240 | move_it_in_display_line_to (it, -1, -1, 0); |
2241 | } | |
2311178e | 2242 | |
b28cb6ed | 2243 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 2244 | } |
b28cb6ed GM |
2245 | |
2246 | /* We're starting a new display line, not affected by the | |
2247 | height of the continued line, so clear the appropriate | |
2248 | fields in the iterator structure. */ | |
2249 | it->max_ascent = it->max_descent = 0; | |
2250 | it->max_phys_ascent = it->max_phys_descent = 0; | |
2311178e | 2251 | |
17fdcfc8 GM |
2252 | it->current_y = first_y; |
2253 | it->vpos = 0; | |
2254 | it->current_x = it->hpos = 0; | |
2255 | } | |
5f5c8ee5 GM |
2256 | } |
2257 | ||
2258 | #if 0 /* Don't assert the following because start_display is sometimes | |
2259 | called intentionally with a window start that is not at a | |
2260 | line start. Please leave this code in as a comment. */ | |
2311178e | 2261 | |
5f5c8ee5 GM |
2262 | /* Window start should be on a line start, now. */ |
2263 | xassert (it->continuation_lines_width | |
2264 | || IT_CHARPOS (it) == BEGV | |
2265 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
2266 | #endif /* 0 */ | |
2267 | } | |
2268 | ||
2269 | ||
4bde0ebb GM |
2270 | /* Return 1 if POS is a position in ellipses displayed for invisible |
2271 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 2272 | |
4bde0ebb GM |
2273 | static int |
2274 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 2275 | struct display_pos *pos; |
4bde0ebb | 2276 | struct window *w; |
5f5c8ee5 | 2277 | { |
ac90c44f | 2278 | Lisp_Object prop, window; |
4bde0ebb GM |
2279 | int ellipses_p = 0; |
2280 | int charpos = CHARPOS (pos->pos); | |
2311178e | 2281 | |
ac90c44f GM |
2282 | /* If POS specifies a position in a display vector, this might |
2283 | be for an ellipsis displayed for invisible text. We won't | |
2284 | get the iterator set up for delivering that ellipsis unless | |
2285 | we make sure that it gets aware of the invisible text. */ | |
2286 | if (pos->dpvec_index >= 0 | |
2287 | && pos->overlay_string_index < 0 | |
2288 | && CHARPOS (pos->string_pos) < 0 | |
2289 | && charpos > BEGV | |
2290 | && (XSETWINDOW (window, w), | |
2291 | prop = Fget_char_property (make_number (charpos), | |
2292 | Qinvisible, window), | |
20fbd925 | 2293 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
2294 | { |
2295 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
2296 | window); | |
8580a4e3 | 2297 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
2298 | } |
2299 | ||
2300 | return ellipses_p; | |
2301 | } | |
2302 | ||
2303 | ||
2304 | /* Initialize IT for stepping through current_buffer in window W, | |
2305 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
2306 | vector/ control character translation position information. Value |
2307 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 2308 | |
47d57b22 | 2309 | static int |
4bde0ebb GM |
2310 | init_from_display_pos (it, w, pos) |
2311 | struct it *it; | |
2312 | struct window *w; | |
2313 | struct display_pos *pos; | |
2314 | { | |
2315 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 2316 | int i, overlay_strings_with_newlines = 0; |
2311178e | 2317 | |
4bde0ebb GM |
2318 | /* If POS specifies a position in a display vector, this might |
2319 | be for an ellipsis displayed for invisible text. We won't | |
2320 | get the iterator set up for delivering that ellipsis unless | |
2321 | we make sure that it gets aware of the invisible text. */ | |
2322 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
2323 | { | |
2324 | --charpos; | |
2325 | bytepos = 0; | |
ac90c44f | 2326 | } |
2311178e | 2327 | |
5f5c8ee5 GM |
2328 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
2329 | text, so we might end up at a position different from POS. This | |
2330 | is only a problem when POS is a row start after a newline and an | |
2331 | overlay starts there with an after-string, and the overlay has an | |
2332 | invisible property. Since we don't skip invisible text in | |
2333 | display_line and elsewhere immediately after consuming the | |
2334 | newline before the row start, such a POS will not be in a string, | |
2335 | but the call to init_iterator below will move us to the | |
2336 | after-string. */ | |
ac90c44f | 2337 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 2338 | |
47d57b22 | 2339 | for (i = 0; i < it->n_overlay_strings; ++i) |
1e1e5daf | 2340 | { |
50f80c2f KR |
2341 | const char *s = SDATA (it->overlay_strings[i]); |
2342 | const char *e = s + SBYTES (it->overlay_strings[i]); | |
2311178e | 2343 | |
1e1e5daf GM |
2344 | while (s < e && *s != '\n') |
2345 | ++s; | |
2346 | ||
2347 | if (s < e) | |
2348 | { | |
2349 | overlay_strings_with_newlines = 1; | |
2350 | break; | |
2351 | } | |
2352 | } | |
47d57b22 | 2353 | |
75c5350a GM |
2354 | /* If position is within an overlay string, set up IT to the right |
2355 | overlay string. */ | |
5f5c8ee5 GM |
2356 | if (pos->overlay_string_index >= 0) |
2357 | { | |
2358 | int relative_index; | |
75c5350a GM |
2359 | |
2360 | /* If the first overlay string happens to have a `display' | |
2361 | property for an image, the iterator will be set up for that | |
2362 | image, and we have to undo that setup first before we can | |
2363 | correct the overlay string index. */ | |
2364 | if (it->method == next_element_from_image) | |
2365 | pop_it (it); | |
2311178e | 2366 | |
5f5c8ee5 GM |
2367 | /* We already have the first chunk of overlay strings in |
2368 | IT->overlay_strings. Load more until the one for | |
2369 | pos->overlay_string_index is in IT->overlay_strings. */ | |
2370 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
2371 | { | |
2372 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
2373 | it->current.overlay_string_index = 0; | |
2374 | while (n--) | |
2375 | { | |
5a08cbaf | 2376 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
2377 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
2378 | } | |
2379 | } | |
2311178e | 2380 | |
5f5c8ee5 GM |
2381 | it->current.overlay_string_index = pos->overlay_string_index; |
2382 | relative_index = (it->current.overlay_string_index | |
2383 | % OVERLAY_STRING_CHUNK_SIZE); | |
2384 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 2385 | xassert (STRINGP (it->string)); |
5f5c8ee5 GM |
2386 | it->current.string_pos = pos->string_pos; |
2387 | it->method = next_element_from_string; | |
2388 | } | |
2311178e | 2389 | |
1e1e5daf GM |
2390 | #if 0 /* This is bogus because POS not having an overlay string |
2391 | position does not mean it's after the string. Example: A | |
2392 | line starting with a before-string and initialization of IT | |
2393 | to the previous row's end position. */ | |
2be8f184 GM |
2394 | else if (it->current.overlay_string_index >= 0) |
2395 | { | |
2396 | /* If POS says we're already after an overlay string ending at | |
2397 | POS, make sure to pop the iterator because it will be in | |
2398 | front of that overlay string. When POS is ZV, we've thereby | |
2399 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
2400 | while (it->sp) |
2401 | pop_it (it); | |
2be8f184 GM |
2402 | it->current.overlay_string_index = -1; |
2403 | it->method = next_element_from_buffer; | |
2404 | if (CHARPOS (pos->pos) == ZV) | |
2405 | it->overlay_strings_at_end_processed_p = 1; | |
2406 | } | |
1e1e5daf | 2407 | #endif /* 0 */ |
2311178e | 2408 | |
2be8f184 | 2409 | if (CHARPOS (pos->string_pos) >= 0) |
5f5c8ee5 GM |
2410 | { |
2411 | /* Recorded position is not in an overlay string, but in another | |
2412 | string. This can only be a string from a `display' property. | |
2413 | IT should already be filled with that string. */ | |
2414 | it->current.string_pos = pos->string_pos; | |
2415 | xassert (STRINGP (it->string)); | |
2416 | } | |
2417 | ||
ac90c44f GM |
2418 | /* Restore position in display vector translations, control |
2419 | character translations or ellipses. */ | |
5f5c8ee5 GM |
2420 | if (pos->dpvec_index >= 0) |
2421 | { | |
ac90c44f GM |
2422 | if (it->dpvec == NULL) |
2423 | get_next_display_element (it); | |
5f5c8ee5 GM |
2424 | xassert (it->dpvec && it->current.dpvec_index == 0); |
2425 | it->current.dpvec_index = pos->dpvec_index; | |
2426 | } | |
2311178e | 2427 | |
5f5c8ee5 | 2428 | CHECK_IT (it); |
47d57b22 | 2429 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
2430 | } |
2431 | ||
2432 | ||
2433 | /* Initialize IT for stepping through current_buffer in window W | |
2434 | starting at ROW->start. */ | |
2435 | ||
2436 | static void | |
2437 | init_to_row_start (it, w, row) | |
2438 | struct it *it; | |
2439 | struct window *w; | |
2440 | struct glyph_row *row; | |
2441 | { | |
2442 | init_from_display_pos (it, w, &row->start); | |
2443 | it->continuation_lines_width = row->continuation_lines_width; | |
2444 | CHECK_IT (it); | |
2445 | } | |
2446 | ||
2311178e | 2447 | |
5f5c8ee5 | 2448 | /* Initialize IT for stepping through current_buffer in window W |
47d57b22 GM |
2449 | starting in the line following ROW, i.e. starting at ROW->end. |
2450 | Value is zero if there are overlay strings with newlines at ROW's | |
2451 | end position. */ | |
5f5c8ee5 | 2452 | |
47d57b22 | 2453 | static int |
5f5c8ee5 GM |
2454 | init_to_row_end (it, w, row) |
2455 | struct it *it; | |
2456 | struct window *w; | |
2457 | struct glyph_row *row; | |
2458 | { | |
47d57b22 | 2459 | int success = 0; |
2311178e | 2460 | |
47d57b22 GM |
2461 | if (init_from_display_pos (it, w, &row->end)) |
2462 | { | |
2463 | if (row->continued_p) | |
2464 | it->continuation_lines_width | |
2465 | = row->continuation_lines_width + row->pixel_width; | |
2466 | CHECK_IT (it); | |
2467 | success = 1; | |
2468 | } | |
2311178e | 2469 | |
47d57b22 | 2470 | return success; |
5f5c8ee5 GM |
2471 | } |
2472 | ||
2473 | ||
2474 | ||
2475 | \f | |
2476 | /*********************************************************************** | |
2477 | Text properties | |
2478 | ***********************************************************************/ | |
2479 | ||
2480 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
2481 | overlay changes. Set IT->stop_charpos to the next position where | |
2482 | to stop. */ | |
2483 | ||
2484 | static void | |
2485 | handle_stop (it) | |
2486 | struct it *it; | |
2487 | { | |
2488 | enum prop_handled handled; | |
2489 | int handle_overlay_change_p = 1; | |
2490 | struct props *p; | |
2491 | ||
2492 | it->dpvec = NULL; | |
2493 | it->current.dpvec_index = -1; | |
2494 | ||
2495 | do | |
2496 | { | |
2497 | handled = HANDLED_NORMALLY; | |
2311178e | 2498 | |
5f5c8ee5 GM |
2499 | /* Call text property handlers. */ |
2500 | for (p = it_props; p->handler; ++p) | |
2501 | { | |
2502 | handled = p->handler (it); | |
2970b9be | 2503 | |
5f5c8ee5 GM |
2504 | if (handled == HANDLED_RECOMPUTE_PROPS) |
2505 | break; | |
2506 | else if (handled == HANDLED_RETURN) | |
2507 | return; | |
2508 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
2509 | handle_overlay_change_p = 0; | |
2510 | } | |
2511 | ||
2512 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
2513 | { | |
2514 | /* Don't check for overlay strings below when set to deliver | |
2515 | characters from a display vector. */ | |
2516 | if (it->method == next_element_from_display_vector) | |
2517 | handle_overlay_change_p = 0; | |
2518 | ||
2519 | /* Handle overlay changes. */ | |
2520 | if (handle_overlay_change_p) | |
2521 | handled = handle_overlay_change (it); | |
2311178e | 2522 | |
5f5c8ee5 GM |
2523 | /* Determine where to stop next. */ |
2524 | if (handled == HANDLED_NORMALLY) | |
2525 | compute_stop_pos (it); | |
2526 | } | |
2527 | } | |
2528 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
2529 | } | |
2530 | ||
2531 | ||
2532 | /* Compute IT->stop_charpos from text property and overlay change | |
2533 | information for IT's current position. */ | |
2534 | ||
2535 | static void | |
2536 | compute_stop_pos (it) | |
2537 | struct it *it; | |
2538 | { | |
2539 | register INTERVAL iv, next_iv; | |
2540 | Lisp_Object object, limit, position; | |
2541 | ||
2542 | /* If nowhere else, stop at the end. */ | |
2543 | it->stop_charpos = it->end_charpos; | |
2311178e | 2544 | |
5f5c8ee5 GM |
2545 | if (STRINGP (it->string)) |
2546 | { | |
2547 | /* Strings are usually short, so don't limit the search for | |
2548 | properties. */ | |
2549 | object = it->string; | |
2550 | limit = Qnil; | |
ac90c44f | 2551 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2552 | } |
2553 | else | |
2554 | { | |
2555 | int charpos; | |
2556 | ||
2557 | /* If next overlay change is in front of the current stop pos | |
2558 | (which is IT->end_charpos), stop there. Note: value of | |
2559 | next_overlay_change is point-max if no overlay change | |
2560 | follows. */ | |
2561 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
2562 | if (charpos < it->stop_charpos) | |
2563 | it->stop_charpos = charpos; | |
2564 | ||
2565 | /* If showing the region, we have to stop at the region | |
2566 | start or end because the face might change there. */ | |
2567 | if (it->region_beg_charpos > 0) | |
2568 | { | |
2569 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
2570 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
2571 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
2572 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
2573 | } | |
2311178e | 2574 | |
5f5c8ee5 GM |
2575 | /* Set up variables for computing the stop position from text |
2576 | property changes. */ | |
2577 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
2578 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
2579 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
2580 | |
2581 | } | |
2582 | ||
2583 | /* Get the interval containing IT's position. Value is a null | |
2584 | interval if there isn't such an interval. */ | |
2585 | iv = validate_interval_range (object, &position, &position, 0); | |
2586 | if (!NULL_INTERVAL_P (iv)) | |
2587 | { | |
2588 | Lisp_Object values_here[LAST_PROP_IDX]; | |
2589 | struct props *p; | |
2590 | ||
2591 | /* Get properties here. */ | |
2592 | for (p = it_props; p->handler; ++p) | |
2593 | values_here[p->idx] = textget (iv->plist, *p->name); | |
2594 | ||
2595 | /* Look for an interval following iv that has different | |
2596 | properties. */ | |
2597 | for (next_iv = next_interval (iv); | |
2598 | (!NULL_INTERVAL_P (next_iv) | |
2599 | && (NILP (limit) | |
2600 | || XFASTINT (limit) > next_iv->position)); | |
2601 | next_iv = next_interval (next_iv)) | |
2602 | { | |
2603 | for (p = it_props; p->handler; ++p) | |
2604 | { | |
2605 | Lisp_Object new_value; | |
2606 | ||
2607 | new_value = textget (next_iv->plist, *p->name); | |
2608 | if (!EQ (values_here[p->idx], new_value)) | |
2609 | break; | |
2610 | } | |
2311178e | 2611 | |
5f5c8ee5 GM |
2612 | if (p->handler) |
2613 | break; | |
2614 | } | |
2615 | ||
2616 | if (!NULL_INTERVAL_P (next_iv)) | |
2617 | { | |
2618 | if (INTEGERP (limit) | |
2619 | && next_iv->position >= XFASTINT (limit)) | |
2620 | /* No text property change up to limit. */ | |
2621 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
2622 | else | |
2623 | /* Text properties change in next_iv. */ | |
2624 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
2625 | } | |
2626 | } | |
2627 | ||
2628 | xassert (STRINGP (it->string) | |
2629 | || (it->stop_charpos >= BEGV | |
2630 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
2631 | } | |
2632 | ||
2633 | ||
2634 | /* Return the position of the next overlay change after POS in | |
2635 | current_buffer. Value is point-max if no overlay change | |
2636 | follows. This is like `next-overlay-change' but doesn't use | |
2637 | xmalloc. */ | |
2638 | ||
2639 | static int | |
2640 | next_overlay_change (pos) | |
2641 | int pos; | |
2642 | { | |
2643 | int noverlays; | |
2644 | int endpos; | |
2645 | Lisp_Object *overlays; | |
2646 | int len; | |
2647 | int i; | |
2648 | ||
2649 | /* Get all overlays at the given position. */ | |
2650 | len = 10; | |
2651 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2652 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2653 | if (noverlays > len) |
2654 | { | |
2655 | len = noverlays; | |
2656 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2657 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2658 | } |
2659 | ||
2660 | /* If any of these overlays ends before endpos, | |
2661 | use its ending point instead. */ | |
2662 | for (i = 0; i < noverlays; ++i) | |
2663 | { | |
2664 | Lisp_Object oend; | |
2665 | int oendpos; | |
2666 | ||
2667 | oend = OVERLAY_END (overlays[i]); | |
2668 | oendpos = OVERLAY_POSITION (oend); | |
2669 | endpos = min (endpos, oendpos); | |
2670 | } | |
2671 | ||
2672 | return endpos; | |
2673 | } | |
2674 | ||
2675 | ||
2676 | \f | |
2677 | /*********************************************************************** | |
2678 | Fontification | |
2679 | ***********************************************************************/ | |
2680 | ||
2681 | /* Handle changes in the `fontified' property of the current buffer by | |
2682 | calling hook functions from Qfontification_functions to fontify | |
2683 | regions of text. */ | |
2684 | ||
2685 | static enum prop_handled | |
2686 | handle_fontified_prop (it) | |
2687 | struct it *it; | |
2688 | { | |
2689 | Lisp_Object prop, pos; | |
2690 | enum prop_handled handled = HANDLED_NORMALLY; | |
2691 | ||
2692 | /* Get the value of the `fontified' property at IT's current buffer | |
2693 | position. (The `fontified' property doesn't have a special | |
2694 | meaning in strings.) If the value is nil, call functions from | |
2695 | Qfontification_functions. */ | |
2696 | if (!STRINGP (it->string) | |
2697 | && it->s == NULL | |
2698 | && !NILP (Vfontification_functions) | |
085536c2 | 2699 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
2700 | && (pos = make_number (IT_CHARPOS (*it)), |
2701 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
2702 | NILP (prop))) | |
2703 | { | |
331379bf | 2704 | int count = SPECPDL_INDEX (); |
085536c2 GM |
2705 | Lisp_Object val; |
2706 | ||
2707 | val = Vfontification_functions; | |
2708 | specbind (Qfontification_functions, Qnil); | |
2311178e | 2709 | |
085536c2 | 2710 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
116d6f5c | 2711 | safe_call1 (val, pos); |
085536c2 GM |
2712 | else |
2713 | { | |
2714 | Lisp_Object globals, fn; | |
2715 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 2716 | |
085536c2 GM |
2717 | globals = Qnil; |
2718 | GCPRO2 (val, globals); | |
2311178e | 2719 | |
085536c2 GM |
2720 | for (; CONSP (val); val = XCDR (val)) |
2721 | { | |
2722 | fn = XCAR (val); | |
2311178e | 2723 | |
085536c2 GM |
2724 | if (EQ (fn, Qt)) |
2725 | { | |
2726 | /* A value of t indicates this hook has a local | |
2727 | binding; it means to run the global binding too. | |
2728 | In a global value, t should not occur. If it | |
2729 | does, we must ignore it to avoid an endless | |
2730 | loop. */ | |
2731 | for (globals = Fdefault_value (Qfontification_functions); | |
2732 | CONSP (globals); | |
2733 | globals = XCDR (globals)) | |
2734 | { | |
2735 | fn = XCAR (globals); | |
2736 | if (!EQ (fn, Qt)) | |
116d6f5c | 2737 | safe_call1 (fn, pos); |
085536c2 GM |
2738 | } |
2739 | } | |
2740 | else | |
116d6f5c | 2741 | safe_call1 (fn, pos); |
085536c2 GM |
2742 | } |
2743 | ||
2744 | UNGCPRO; | |
2745 | } | |
2746 | ||
2747 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2748 | |
2749 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
2750 | something. This avoids an endless loop if they failed to | |
2751 | fontify the text for which reason ever. */ | |
2752 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
2753 | handled = HANDLED_RECOMPUTE_PROPS; | |
2754 | } | |
2755 | ||
2756 | return handled; | |
2757 | } | |
2758 | ||
2759 | ||
2760 | \f | |
2761 | /*********************************************************************** | |
2762 | Faces | |
2763 | ***********************************************************************/ | |
2764 | ||
2765 | /* Set up iterator IT from face properties at its current position. | |
2766 | Called from handle_stop. */ | |
2767 | ||
2768 | static enum prop_handled | |
2769 | handle_face_prop (it) | |
2770 | struct it *it; | |
2771 | { | |
2772 | int new_face_id, next_stop; | |
2311178e | 2773 | |
5f5c8ee5 GM |
2774 | if (!STRINGP (it->string)) |
2775 | { | |
2776 | new_face_id | |
2777 | = face_at_buffer_position (it->w, | |
2778 | IT_CHARPOS (*it), | |
2779 | it->region_beg_charpos, | |
2780 | it->region_end_charpos, | |
2781 | &next_stop, | |
2782 | (IT_CHARPOS (*it) | |
2783 | + TEXT_PROP_DISTANCE_LIMIT), | |
2784 | 0); | |
2311178e | 2785 | |
5f5c8ee5 GM |
2786 | /* Is this a start of a run of characters with box face? |
2787 | Caveat: this can be called for a freshly initialized | |
4b41cebb | 2788 | iterator; face_id is -1 in this case. We know that the new |
5f5c8ee5 GM |
2789 | face will not change until limit, i.e. if the new face has a |
2790 | box, all characters up to limit will have one. But, as | |
2791 | usual, we don't know whether limit is really the end. */ | |
2792 | if (new_face_id != it->face_id) | |
2793 | { | |
2794 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2311178e | 2795 | |
5f5c8ee5 GM |
2796 | /* If new face has a box but old face has not, this is |
2797 | the start of a run of characters with box, i.e. it has | |
2798 | a shadow on the left side. The value of face_id of the | |
2799 | iterator will be -1 if this is the initial call that gets | |
2800 | the face. In this case, we have to look in front of IT's | |
2801 | position and see whether there is a face != new_face_id. */ | |
2802 | it->start_of_box_run_p | |
2803 | = (new_face->box != FACE_NO_BOX | |
2804 | && (it->face_id >= 0 | |
2805 | || IT_CHARPOS (*it) == BEG | |
2806 | || new_face_id != face_before_it_pos (it))); | |
2807 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2808 | } | |
2809 | } | |
2810 | else | |
2811 | { | |
06a12811 GM |
2812 | int base_face_id, bufpos; |
2813 | ||
2814 | if (it->current.overlay_string_index >= 0) | |
2815 | bufpos = IT_CHARPOS (*it); | |
2816 | else | |
2817 | bufpos = 0; | |
2311178e | 2818 | |
06a12811 GM |
2819 | /* For strings from a buffer, i.e. overlay strings or strings |
2820 | from a `display' property, use the face at IT's current | |
2821 | buffer position as the base face to merge with, so that | |
2822 | overlay strings appear in the same face as surrounding | |
2823 | text, unless they specify their own faces. */ | |
2824 | base_face_id = underlying_face_id (it); | |
2311178e | 2825 | |
06a12811 GM |
2826 | new_face_id = face_at_string_position (it->w, |
2827 | it->string, | |
2828 | IT_STRING_CHARPOS (*it), | |
2829 | bufpos, | |
2830 | it->region_beg_charpos, | |
2831 | it->region_end_charpos, | |
2832 | &next_stop, | |
5de7c6f2 | 2833 | base_face_id, 0); |
2311178e | 2834 | |
5f5c8ee5 GM |
2835 | #if 0 /* This shouldn't be neccessary. Let's check it. */ |
2836 | /* If IT is used to display a mode line we would really like to | |
2837 | use the mode line face instead of the frame's default face. */ | |
2838 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2839 | && new_face_id == DEFAULT_FACE_ID) | |
96d2320f | 2840 | new_face_id = CURRENT_MODE_LINE_FACE_ID (it->w); |
5f5c8ee5 | 2841 | #endif |
2311178e | 2842 | |
5f5c8ee5 GM |
2843 | /* Is this a start of a run of characters with box? Caveat: |
2844 | this can be called for a freshly allocated iterator; face_id | |
2845 | is -1 is this case. We know that the new face will not | |
2846 | change until the next check pos, i.e. if the new face has a | |
2847 | box, all characters up to that position will have a | |
2848 | box. But, as usual, we don't know whether that position | |
2849 | is really the end. */ | |
2850 | if (new_face_id != it->face_id) | |
2851 | { | |
2852 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2853 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2311178e | 2854 | |
5f5c8ee5 GM |
2855 | /* If new face has a box but old face hasn't, this is the |
2856 | start of a run of characters with box, i.e. it has a | |
2857 | shadow on the left side. */ | |
2858 | it->start_of_box_run_p | |
2859 | = new_face->box && (old_face == NULL || !old_face->box); | |
2860 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2861 | } | |
2862 | } | |
2311178e | 2863 | |
5f5c8ee5 | 2864 | it->face_id = new_face_id; |
5f5c8ee5 GM |
2865 | return HANDLED_NORMALLY; |
2866 | } | |
2867 | ||
2868 | ||
06a12811 GM |
2869 | /* Return the ID of the face ``underlying'' IT's current position, |
2870 | which is in a string. If the iterator is associated with a | |
2871 | buffer, return the face at IT's current buffer position. | |
2872 | Otherwise, use the iterator's base_face_id. */ | |
2873 | ||
2874 | static int | |
2875 | underlying_face_id (it) | |
2876 | struct it *it; | |
2877 | { | |
2878 | int face_id = it->base_face_id, i; | |
2879 | ||
2880 | xassert (STRINGP (it->string)); | |
2881 | ||
2882 | for (i = it->sp - 1; i >= 0; --i) | |
2883 | if (NILP (it->stack[i].string)) | |
2884 | face_id = it->stack[i].face_id; | |
2885 | ||
2886 | return face_id; | |
2887 | } | |
2888 | ||
2889 | ||
5f5c8ee5 GM |
2890 | /* Compute the face one character before or after the current position |
2891 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2892 | position. Value is the id of the face. */ | |
2893 | ||
2894 | static int | |
2895 | face_before_or_after_it_pos (it, before_p) | |
2896 | struct it *it; | |
2897 | int before_p; | |
2898 | { | |
2899 | int face_id, limit; | |
2900 | int next_check_charpos; | |
2901 | struct text_pos pos; | |
2902 | ||
2903 | xassert (it->s == NULL); | |
2311178e | 2904 | |
5f5c8ee5 GM |
2905 | if (STRINGP (it->string)) |
2906 | { | |
06a12811 | 2907 | int bufpos, base_face_id; |
2311178e | 2908 | |
5f5c8ee5 GM |
2909 | /* No face change past the end of the string (for the case |
2910 | we are padding with spaces). No face change before the | |
2911 | string start. */ | |
2051c264 | 2912 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string) |
5f5c8ee5 GM |
2913 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) |
2914 | return it->face_id; | |
2915 | ||
2916 | /* Set pos to the position before or after IT's current position. */ | |
2917 | if (before_p) | |
2918 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2919 | else | |
260a86a0 KH |
2920 | /* For composition, we must check the character after the |
2921 | composition. */ | |
2922 | pos = (it->what == IT_COMPOSITION | |
2923 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2924 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 2925 | |
06a12811 GM |
2926 | if (it->current.overlay_string_index >= 0) |
2927 | bufpos = IT_CHARPOS (*it); | |
2928 | else | |
2929 | bufpos = 0; | |
2930 | ||
2931 | base_face_id = underlying_face_id (it); | |
2932 | ||
5f5c8ee5 | 2933 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
2934 | face_id = face_at_string_position (it->w, |
2935 | it->string, | |
2936 | CHARPOS (pos), | |
2937 | bufpos, | |
2938 | it->region_beg_charpos, | |
2939 | it->region_end_charpos, | |
2940 | &next_check_charpos, | |
5de7c6f2 | 2941 | base_face_id, 0); |
5f5c8ee5 GM |
2942 | |
2943 | /* Correct the face for charsets different from ASCII. Do it | |
2944 | for the multibyte case only. The face returned above is | |
2945 | suitable for unibyte text if IT->string is unibyte. */ | |
2946 | if (STRING_MULTIBYTE (it->string)) | |
2947 | { | |
50f80c2f | 2948 | const unsigned char *p = SDATA (it->string) + BYTEPOS (pos); |
2051c264 | 2949 | int rest = SBYTES (it->string) - BYTEPOS (pos); |
980806b6 KH |
2950 | int c, len; |
2951 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2311178e | 2952 | |
4fdb80f2 | 2953 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2954 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2955 | } |
2956 | } | |
2957 | else | |
2958 | { | |
70851746 GM |
2959 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2960 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2961 | return it->face_id; | |
2311178e | 2962 | |
5f5c8ee5 GM |
2963 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2964 | pos = it->current.pos; | |
2311178e | 2965 | |
5f5c8ee5 | 2966 | if (before_p) |
c1005d06 | 2967 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2968 | else |
260a86a0 KH |
2969 | { |
2970 | if (it->what == IT_COMPOSITION) | |
2971 | /* For composition, we must check the position after the | |
2972 | composition. */ | |
2973 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2974 | else | |
c1005d06 | 2975 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2976 | } |
2311178e | 2977 | |
5f5c8ee5 GM |
2978 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2979 | face_id = face_at_buffer_position (it->w, | |
2980 | CHARPOS (pos), | |
2981 | it->region_beg_charpos, | |
2982 | it->region_end_charpos, | |
2983 | &next_check_charpos, | |
2984 | limit, 0); | |
2985 | ||
2986 | /* Correct the face for charsets different from ASCII. Do it | |
2987 | for the multibyte case only. The face returned above is | |
2988 | suitable for unibyte text if current_buffer is unibyte. */ | |
2989 | if (it->multibyte_p) | |
2990 | { | |
1d1b6e6a | 2991 | int c = FETCH_MULTIBYTE_CHAR (BYTEPOS (pos)); |
980806b6 KH |
2992 | struct face *face = FACE_FROM_ID (it->f, face_id); |
2993 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2994 | } |
2995 | } | |
2311178e | 2996 | |
5f5c8ee5 GM |
2997 | return face_id; |
2998 | } | |
2999 | ||
3000 | ||
3001 | \f | |
3002 | /*********************************************************************** | |
3003 | Invisible text | |
3004 | ***********************************************************************/ | |
3005 | ||
3006 | /* Set up iterator IT from invisible properties at its current | |
3007 | position. Called from handle_stop. */ | |
3008 | ||
3009 | static enum prop_handled | |
3010 | handle_invisible_prop (it) | |
3011 | struct it *it; | |
3012 | { | |
3013 | enum prop_handled handled = HANDLED_NORMALLY; | |
3014 | ||
3015 | if (STRINGP (it->string)) | |
3016 | { | |
3017 | extern Lisp_Object Qinvisible; | |
3018 | Lisp_Object prop, end_charpos, limit, charpos; | |
3019 | ||
3020 | /* Get the value of the invisible text property at the | |
3021 | current position. Value will be nil if there is no such | |
3022 | property. */ | |
ac90c44f | 3023 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
3024 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
3025 | ||
eadc0bf8 GM |
3026 | if (!NILP (prop) |
3027 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
3028 | { |
3029 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 3030 | |
5f5c8ee5 GM |
3031 | /* Get the position at which the next change of the |
3032 | invisible text property can be found in IT->string. | |
3033 | Value will be nil if the property value is the same for | |
3034 | all the rest of IT->string. */ | |
2051c264 | 3035 | XSETINT (limit, SCHARS (it->string)); |
5f5c8ee5 | 3036 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, |
2051c264 | 3037 | it->string, limit); |
2311178e | 3038 | |
5f5c8ee5 GM |
3039 | /* Text at current position is invisible. The next |
3040 | change in the property is at position end_charpos. | |
3041 | Move IT's current position to that position. */ | |
3042 | if (INTEGERP (end_charpos) | |
3043 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
3044 | { | |
3045 | struct text_pos old; | |
3046 | old = it->current.string_pos; | |
3047 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
3048 | compute_string_pos (&it->current.string_pos, old, it->string); | |
3049 | } | |
3050 | else | |
3051 | { | |
3052 | /* The rest of the string is invisible. If this is an | |
3053 | overlay string, proceed with the next overlay string | |
3054 | or whatever comes and return a character from there. */ | |
3055 | if (it->current.overlay_string_index >= 0) | |
3056 | { | |
3057 | next_overlay_string (it); | |
3058 | /* Don't check for overlay strings when we just | |
3059 | finished processing them. */ | |
3060 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
3061 | } | |
3062 | else | |
3063 | { | |
2051c264 GM |
3064 | IT_STRING_CHARPOS (*it) = SCHARS (it->string); |
3065 | IT_STRING_BYTEPOS (*it) = SBYTES (it->string); | |
5f5c8ee5 GM |
3066 | } |
3067 | } | |
3068 | } | |
3069 | } | |
3070 | else | |
3071 | { | |
8580a4e3 | 3072 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 3073 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
3074 | |
3075 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 3076 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 3077 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
3078 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
3079 | &overlay); | |
8580a4e3 SM |
3080 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
3081 | ||
5f5c8ee5 | 3082 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 3083 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
3084 | { |
3085 | /* Record whether we have to display an ellipsis for the | |
3086 | invisible text. */ | |
8580a4e3 | 3087 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
3088 | |
3089 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 3090 | |
5f5c8ee5 GM |
3091 | /* Loop skipping over invisible text. The loop is left at |
3092 | ZV or with IT on the first char being visible again. */ | |
3093 | do | |
3094 | { | |
3095 | /* Try to skip some invisible text. Return value is the | |
3096 | position reached which can be equal to IT's position | |
3097 | if there is nothing invisible here. This skips both | |
3098 | over invisible text properties and overlays with | |
3099 | invisible property. */ | |
3100 | newpos = skip_invisible (IT_CHARPOS (*it), | |
3101 | &next_stop, ZV, it->window); | |
3102 | ||
3103 | /* If we skipped nothing at all we weren't at invisible | |
3104 | text in the first place. If everything to the end of | |
3105 | the buffer was skipped, end the loop. */ | |
3106 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 3107 | invis_p = 0; |
5f5c8ee5 GM |
3108 | else |
3109 | { | |
3110 | /* We skipped some characters but not necessarily | |
3111 | all there are. Check if we ended up on visible | |
3112 | text. Fget_char_property returns the property of | |
3113 | the char before the given position, i.e. if we | |
8580a4e3 | 3114 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 3115 | newpos is visible. */ |
ac90c44f | 3116 | pos = make_number (newpos); |
5f5c8ee5 | 3117 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 3118 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 | 3119 | } |
2311178e | 3120 | |
5f5c8ee5 GM |
3121 | /* If we ended up on invisible text, proceed to |
3122 | skip starting with next_stop. */ | |
8580a4e3 | 3123 | if (invis_p) |
5f5c8ee5 GM |
3124 | IT_CHARPOS (*it) = next_stop; |
3125 | } | |
8580a4e3 | 3126 | while (invis_p); |
5a08cbaf | 3127 | |
5f5c8ee5 GM |
3128 | /* The position newpos is now either ZV or on visible text. */ |
3129 | IT_CHARPOS (*it) = newpos; | |
3130 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2311178e | 3131 | |
5a08cbaf GM |
3132 | /* If there are before-strings at the start of invisible |
3133 | text, and the text is invisible because of a text | |
3134 | property, arrange to show before-strings because 20.x did | |
3135 | it that way. (If the text is invisible because of an | |
3136 | overlay property instead of a text property, this is | |
3137 | already handled in the overlay code.) */ | |
3138 | if (NILP (overlay) | |
3139 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 3140 | { |
5a08cbaf GM |
3141 | handled = HANDLED_RECOMPUTE_PROPS; |
3142 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 3143 | } |
5a08cbaf GM |
3144 | else if (display_ellipsis_p) |
3145 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3146 | } |
3147 | } | |
3148 | ||
3149 | return handled; | |
3150 | } | |
3151 | ||
3152 | ||
5a08cbaf GM |
3153 | /* Make iterator IT return `...' next. */ |
3154 | ||
3155 | static void | |
3156 | setup_for_ellipsis (it) | |
3157 | struct it *it; | |
3158 | { | |
2311178e | 3159 | if (it->dp |
5a08cbaf GM |
3160 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
3161 | { | |
3162 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3163 | it->dpvec = v->contents; | |
3164 | it->dpend = v->contents + v->size; | |
3165 | } | |
2311178e | 3166 | else |
5a08cbaf GM |
3167 | { |
3168 | /* Default `...'. */ | |
3169 | it->dpvec = default_invis_vector; | |
3170 | it->dpend = default_invis_vector + 3; | |
3171 | } | |
2311178e | 3172 | |
5a08cbaf GM |
3173 | /* The ellipsis display does not replace the display of the |
3174 | character at the new position. Indicate this by setting | |
3175 | IT->dpvec_char_len to zero. */ | |
3176 | it->dpvec_char_len = 0; | |
2311178e | 3177 | |
5a08cbaf GM |
3178 | it->current.dpvec_index = 0; |
3179 | it->method = next_element_from_display_vector; | |
3180 | } | |
3181 | ||
3182 | ||
5f5c8ee5 GM |
3183 | \f |
3184 | /*********************************************************************** | |
3185 | 'display' property | |
3186 | ***********************************************************************/ | |
3187 | ||
3188 | /* Set up iterator IT from `display' property at its current position. | |
3189 | Called from handle_stop. */ | |
3190 | ||
3191 | static enum prop_handled | |
3192 | handle_display_prop (it) | |
3193 | struct it *it; | |
3194 | { | |
3195 | Lisp_Object prop, object; | |
3196 | struct text_pos *position; | |
a61b7058 | 3197 | int display_replaced_p = 0; |
5f5c8ee5 GM |
3198 | |
3199 | if (STRINGP (it->string)) | |
3200 | { | |
3201 | object = it->string; | |
3202 | position = &it->current.string_pos; | |
3203 | } | |
3204 | else | |
3205 | { | |
221dd3e7 | 3206 | object = it->w->buffer; |
5f5c8ee5 GM |
3207 | position = &it->current.pos; |
3208 | } | |
3209 | ||
3210 | /* Reset those iterator values set from display property values. */ | |
3211 | it->font_height = Qnil; | |
3212 | it->space_width = Qnil; | |
3213 | it->voffset = 0; | |
3214 | ||
3215 | /* We don't support recursive `display' properties, i.e. string | |
3216 | values that have a string `display' property, that have a string | |
3217 | `display' property etc. */ | |
3218 | if (!it->string_from_display_prop_p) | |
3219 | it->area = TEXT_AREA; | |
3220 | ||
3221 | prop = Fget_char_property (make_number (position->charpos), | |
3222 | Qdisplay, object); | |
3223 | if (NILP (prop)) | |
3224 | return HANDLED_NORMALLY; | |
3225 | ||
f3751a65 | 3226 | if (CONSP (prop) |
12700f40 GM |
3227 | /* Simple properties. */ |
3228 | && !EQ (XCAR (prop), Qimage) | |
3229 | && !EQ (XCAR (prop), Qspace) | |
3230 | && !EQ (XCAR (prop), Qwhen) | |
3231 | && !EQ (XCAR (prop), Qspace_width) | |
3232 | && !EQ (XCAR (prop), Qheight) | |
3233 | && !EQ (XCAR (prop), Qraise) | |
3234 | /* Marginal area specifications. */ | |
3235 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
3236 | && !NILP (XCAR (prop))) | |
5f5c8ee5 | 3237 | { |
a61b7058 | 3238 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 3239 | { |
a61b7058 GM |
3240 | if (handle_single_display_prop (it, XCAR (prop), object, |
3241 | position, display_replaced_p)) | |
3242 | display_replaced_p = 1; | |
5f5c8ee5 GM |
3243 | } |
3244 | } | |
3245 | else if (VECTORP (prop)) | |
3246 | { | |
3247 | int i; | |
a61b7058 GM |
3248 | for (i = 0; i < ASIZE (prop); ++i) |
3249 | if (handle_single_display_prop (it, AREF (prop, i), object, | |
3250 | position, display_replaced_p)) | |
3251 | display_replaced_p = 1; | |
5f5c8ee5 GM |
3252 | } |
3253 | else | |
3254 | { | |
a61b7058 GM |
3255 | if (handle_single_display_prop (it, prop, object, position, 0)) |
3256 | display_replaced_p = 1; | |
5f5c8ee5 GM |
3257 | } |
3258 | ||
a61b7058 | 3259 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
3260 | } |
3261 | ||
3262 | ||
6c577098 | 3263 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
3264 | at START_POS in OBJECT. */ |
3265 | ||
3266 | static struct text_pos | |
3267 | display_prop_end (it, object, start_pos) | |
3268 | struct it *it; | |
3269 | Lisp_Object object; | |
3270 | struct text_pos start_pos; | |
3271 | { | |
3272 | Lisp_Object end; | |
3273 | struct text_pos end_pos; | |
5f5c8ee5 | 3274 | |
016b5642 MB |
3275 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
3276 | Qdisplay, object, Qnil); | |
6c577098 GM |
3277 | CHARPOS (end_pos) = XFASTINT (end); |
3278 | if (STRINGP (object)) | |
5f5c8ee5 GM |
3279 | compute_string_pos (&end_pos, start_pos, it->string); |
3280 | else | |
6c577098 | 3281 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
3282 | |
3283 | return end_pos; | |
3284 | } | |
3285 | ||
3286 | ||
3287 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
3288 | is the object in which the `display' property was found. *POSITION | |
a61b7058 GM |
3289 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
3290 | means that we previously saw a display sub-property which already | |
3291 | replaced text display with something else, for example an image; | |
3292 | ignore such properties after the first one has been processed. | |
5f5c8ee5 GM |
3293 | |
3294 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
3295 | end position of the `display' property. | |
3296 | ||
4b41cebb | 3297 | Value is non-zero if something was found which replaces the display |
a61b7058 | 3298 | of buffer or string text. */ |
5f5c8ee5 GM |
3299 | |
3300 | static int | |
a61b7058 GM |
3301 | handle_single_display_prop (it, prop, object, position, |
3302 | display_replaced_before_p) | |
5f5c8ee5 GM |
3303 | struct it *it; |
3304 | Lisp_Object prop; | |
3305 | Lisp_Object object; | |
3306 | struct text_pos *position; | |
a61b7058 | 3307 | int display_replaced_before_p; |
5f5c8ee5 GM |
3308 | { |
3309 | Lisp_Object value; | |
a61b7058 | 3310 | int replaces_text_display_p = 0; |
5f5c8ee5 GM |
3311 | Lisp_Object form; |
3312 | ||
d3acf96b | 3313 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
4b41cebb | 3314 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 3315 | form = Qt; |
d3acf96b | 3316 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
3317 | { |
3318 | prop = XCDR (prop); | |
3319 | if (!CONSP (prop)) | |
3320 | return 0; | |
3321 | form = XCAR (prop); | |
3322 | prop = XCDR (prop); | |
5f5c8ee5 GM |
3323 | } |
3324 | ||
3325 | if (!NILP (form) && !EQ (form, Qt)) | |
3326 | { | |
331379bf | 3327 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 3328 | struct gcpro gcpro1; |
5f5c8ee5 | 3329 | |
b384d6f8 GM |
3330 | /* Bind `object' to the object having the `display' property, a |
3331 | buffer or string. Bind `position' to the position in the | |
3332 | object where the property was found, and `buffer-position' | |
3333 | to the current position in the buffer. */ | |
3334 | specbind (Qobject, object); | |
31ac723b SM |
3335 | specbind (Qposition, make_number (CHARPOS (*position))); |
3336 | specbind (Qbuffer_position, | |
3337 | make_number (STRINGP (object) | |
3338 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 3339 | GCPRO1 (form); |
116d6f5c | 3340 | form = safe_eval (form); |
b384d6f8 GM |
3341 | UNGCPRO; |
3342 | unbind_to (count, Qnil); | |
5f5c8ee5 | 3343 | } |
2311178e | 3344 | |
5f5c8ee5 GM |
3345 | if (NILP (form)) |
3346 | return 0; | |
3347 | ||
3348 | if (CONSP (prop) | |
3349 | && EQ (XCAR (prop), Qheight) | |
3350 | && CONSP (XCDR (prop))) | |
3351 | { | |
e4093f38 | 3352 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 | 3353 | return 0; |
2311178e | 3354 | |
5f5c8ee5 GM |
3355 | /* `(height HEIGHT)'. */ |
3356 | it->font_height = XCAR (XCDR (prop)); | |
3357 | if (!NILP (it->font_height)) | |
3358 | { | |
3359 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
3360 | int new_height = -1; | |
3361 | ||
3362 | if (CONSP (it->font_height) | |
3363 | && (EQ (XCAR (it->font_height), Qplus) | |
3364 | || EQ (XCAR (it->font_height), Qminus)) | |
3365 | && CONSP (XCDR (it->font_height)) | |
3366 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
3367 | { | |
3368 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
3369 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
3370 | if (EQ (XCAR (it->font_height), Qplus)) | |
3371 | steps = - steps; | |
3372 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
3373 | } | |
0d8b31c0 | 3374 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
3375 | { |
3376 | /* Call function with current height as argument. | |
3377 | Value is the new height. */ | |
116d6f5c GM |
3378 | Lisp_Object height; |
3379 | height = safe_call1 (it->font_height, | |
3380 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
3381 | if (NUMBERP (height)) |
3382 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
3383 | } |
3384 | else if (NUMBERP (it->font_height)) | |
3385 | { | |
3386 | /* Value is a multiple of the canonical char height. */ | |
3387 | struct face *face; | |
2311178e | 3388 | |
5f5c8ee5 GM |
3389 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); |
3390 | new_height = (XFLOATINT (it->font_height) | |
3391 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
3392 | } | |
3393 | else | |
3394 | { | |
3395 | /* Evaluate IT->font_height with `height' bound to the | |
3396 | current specified height to get the new height. */ | |
3397 | Lisp_Object value; | |
331379bf | 3398 | int count = SPECPDL_INDEX (); |
2311178e | 3399 | |
5f5c8ee5 | 3400 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); |
116d6f5c | 3401 | value = safe_eval (it->font_height); |
5f5c8ee5 | 3402 | unbind_to (count, Qnil); |
2311178e | 3403 | |
5f5c8ee5 GM |
3404 | if (NUMBERP (value)) |
3405 | new_height = XFLOATINT (value); | |
3406 | } | |
2311178e | 3407 | |
5f5c8ee5 GM |
3408 | if (new_height > 0) |
3409 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
3410 | } | |
3411 | } | |
3412 | else if (CONSP (prop) | |
3413 | && EQ (XCAR (prop), Qspace_width) | |
3414 | && CONSP (XCDR (prop))) | |
3415 | { | |
3416 | /* `(space_width WIDTH)'. */ | |
e4093f38 | 3417 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3418 | return 0; |
2311178e | 3419 | |
5f5c8ee5 GM |
3420 | value = XCAR (XCDR (prop)); |
3421 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
3422 | it->space_width = value; | |
3423 | } | |
3424 | else if (CONSP (prop) | |
3425 | && EQ (XCAR (prop), Qraise) | |
3426 | && CONSP (XCDR (prop))) | |
3427 | { | |
5f5c8ee5 | 3428 | /* `(raise FACTOR)'. */ |
e4093f38 | 3429 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3430 | return 0; |
2311178e | 3431 | |
fb3842a8 | 3432 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
3433 | value = XCAR (XCDR (prop)); |
3434 | if (NUMBERP (value)) | |
3435 | { | |
3436 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
3437 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 3438 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
3439 | } |
3440 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3441 | } | |
3442 | else if (!it->string_from_display_prop_p) | |
3443 | { | |
f3751a65 | 3444 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
4b41cebb | 3445 | VALUE) or `((margin nil) VALUE)' or VALUE. */ |
5f5c8ee5 GM |
3446 | Lisp_Object location, value; |
3447 | struct text_pos start_pos; | |
3448 | int valid_p; | |
3449 | ||
3450 | /* Characters having this form of property are not displayed, so | |
3451 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
3452 | start_pos = *position; |
3453 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 3454 | value = Qnil; |
5f5c8ee5 GM |
3455 | |
3456 | /* Let's stop at the new position and assume that all | |
3457 | text properties change there. */ | |
3458 | it->stop_charpos = position->charpos; | |
3459 | ||
f3751a65 GM |
3460 | location = Qunbound; |
3461 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 3462 | { |
f3751a65 | 3463 | Lisp_Object tem; |
2311178e | 3464 | |
5f5c8ee5 | 3465 | value = XCDR (prop); |
f3751a65 GM |
3466 | if (CONSP (value)) |
3467 | value = XCAR (value); | |
3468 | ||
3469 | tem = XCAR (prop); | |
3470 | if (EQ (XCAR (tem), Qmargin) | |
3471 | && (tem = XCDR (tem), | |
3472 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
3473 | (NILP (tem) | |
3474 | || EQ (tem, Qleft_margin) | |
3475 | || EQ (tem, Qright_margin)))) | |
3476 | location = tem; | |
5f5c8ee5 | 3477 | } |
f3751a65 GM |
3478 | |
3479 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
3480 | { |
3481 | location = Qnil; | |
3482 | value = prop; | |
3483 | } | |
3484 | ||
3485 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 3486 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
3487 | valid_p = STRINGP (value); |
3488 | else | |
3489 | valid_p = (STRINGP (value) | |
3490 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3491 | || valid_image_p (value)); | |
3492 | #else /* not HAVE_WINDOW_SYSTEM */ | |
3493 | valid_p = STRINGP (value); | |
3494 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2311178e | 3495 | |
5f5c8ee5 GM |
3496 | if ((EQ (location, Qleft_margin) |
3497 | || EQ (location, Qright_margin) | |
3498 | || NILP (location)) | |
a61b7058 GM |
3499 | && valid_p |
3500 | && !display_replaced_before_p) | |
5f5c8ee5 | 3501 | { |
a61b7058 | 3502 | replaces_text_display_p = 1; |
2311178e | 3503 | |
5f5c8ee5 GM |
3504 | /* Save current settings of IT so that we can restore them |
3505 | when we are finished with the glyph property value. */ | |
3506 | push_it (it); | |
2311178e | 3507 | |
5f5c8ee5 GM |
3508 | if (NILP (location)) |
3509 | it->area = TEXT_AREA; | |
3510 | else if (EQ (location, Qleft_margin)) | |
3511 | it->area = LEFT_MARGIN_AREA; | |
3512 | else | |
3513 | it->area = RIGHT_MARGIN_AREA; | |
2311178e | 3514 | |
5f5c8ee5 GM |
3515 | if (STRINGP (value)) |
3516 | { | |
3517 | it->string = value; | |
3518 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3519 | it->current.overlay_string_index = -1; | |
3520 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2051c264 | 3521 | it->end_charpos = it->string_nchars = SCHARS (it->string); |
5f5c8ee5 GM |
3522 | it->method = next_element_from_string; |
3523 | it->stop_charpos = 0; | |
3524 | it->string_from_display_prop_p = 1; | |
e187cf71 GM |
3525 | /* Say that we haven't consumed the characters with |
3526 | `display' property yet. The call to pop_it in | |
3527 | set_iterator_to_next will clean this up. */ | |
3528 | *position = start_pos; | |
5f5c8ee5 GM |
3529 | } |
3530 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3531 | { | |
3532 | it->method = next_element_from_stretch; | |
3533 | it->object = value; | |
3534 | it->current.pos = it->position = start_pos; | |
3535 | } | |
3536 | #ifdef HAVE_WINDOW_SYSTEM | |
3537 | else | |
3538 | { | |
3539 | it->what = IT_IMAGE; | |
3540 | it->image_id = lookup_image (it->f, value); | |
3541 | it->position = start_pos; | |
3542 | it->object = NILP (object) ? it->w->buffer : object; | |
3543 | it->method = next_element_from_image; | |
2311178e | 3544 | |
02513cdd | 3545 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
3546 | `display' property yet. The call to pop_it in |
3547 | set_iterator_to_next will clean this up. */ | |
3548 | *position = start_pos; | |
3549 | } | |
3550 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3551 | } | |
a21a3943 GM |
3552 | else |
3553 | /* Invalid property or property not supported. Restore | |
3554 | the position to what it was before. */ | |
3555 | *position = start_pos; | |
5f5c8ee5 GM |
3556 | } |
3557 | ||
a61b7058 | 3558 | return replaces_text_display_p; |
5f5c8ee5 GM |
3559 | } |
3560 | ||
3561 | ||
06568bbf GM |
3562 | /* Check if PROP is a display sub-property value whose text should be |
3563 | treated as intangible. */ | |
3564 | ||
3565 | static int | |
3566 | single_display_prop_intangible_p (prop) | |
3567 | Lisp_Object prop; | |
3568 | { | |
3569 | /* Skip over `when FORM'. */ | |
3570 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3571 | { | |
3572 | prop = XCDR (prop); | |
3573 | if (!CONSP (prop)) | |
3574 | return 0; | |
3575 | prop = XCDR (prop); | |
3576 | } | |
3577 | ||
959bc044 SM |
3578 | if (STRINGP (prop)) |
3579 | return 1; | |
3580 | ||
06568bbf GM |
3581 | if (!CONSP (prop)) |
3582 | return 0; | |
3583 | ||
3584 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
3585 | we don't need to treat text as intangible. */ | |
3586 | if (EQ (XCAR (prop), Qmargin)) | |
3587 | { | |
3588 | prop = XCDR (prop); | |
3589 | if (!CONSP (prop)) | |
3590 | return 0; | |
3591 | ||
3592 | prop = XCDR (prop); | |
3593 | if (!CONSP (prop) | |
3594 | || EQ (XCAR (prop), Qleft_margin) | |
3595 | || EQ (XCAR (prop), Qright_margin)) | |
3596 | return 0; | |
3597 | } | |
2311178e | 3598 | |
6cd83a9a SM |
3599 | return (CONSP (prop) |
3600 | && (EQ (XCAR (prop), Qimage) | |
3601 | || EQ (XCAR (prop), Qspace))); | |
06568bbf GM |
3602 | } |
3603 | ||
3604 | ||
3605 | /* Check if PROP is a display property value whose text should be | |
3606 | treated as intangible. */ | |
3607 | ||
3608 | int | |
3609 | display_prop_intangible_p (prop) | |
3610 | Lisp_Object prop; | |
3611 | { | |
3612 | if (CONSP (prop) | |
3613 | && CONSP (XCAR (prop)) | |
3614 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3615 | { | |
3616 | /* A list of sub-properties. */ | |
3617 | while (CONSP (prop)) | |
3618 | { | |
3619 | if (single_display_prop_intangible_p (XCAR (prop))) | |
3620 | return 1; | |
3621 | prop = XCDR (prop); | |
3622 | } | |
3623 | } | |
3624 | else if (VECTORP (prop)) | |
3625 | { | |
3626 | /* A vector of sub-properties. */ | |
3627 | int i; | |
a61b7058 GM |
3628 | for (i = 0; i < ASIZE (prop); ++i) |
3629 | if (single_display_prop_intangible_p (AREF (prop, i))) | |
06568bbf GM |
3630 | return 1; |
3631 | } | |
3632 | else | |
3633 | return single_display_prop_intangible_p (prop); | |
3634 | ||
3635 | return 0; | |
3636 | } | |
3637 | ||
74bd6d65 GM |
3638 | |
3639 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
3640 | ||
3641 | static int | |
3642 | single_display_prop_string_p (prop, string) | |
3643 | Lisp_Object prop, string; | |
3644 | { | |
74bd6d65 GM |
3645 | if (EQ (string, prop)) |
3646 | return 1; | |
2311178e | 3647 | |
74bd6d65 GM |
3648 | /* Skip over `when FORM'. */ |
3649 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3650 | { | |
3651 | prop = XCDR (prop); | |
3652 | if (!CONSP (prop)) | |
3653 | return 0; | |
3654 | prop = XCDR (prop); | |
3655 | } | |
3656 | ||
3657 | if (CONSP (prop)) | |
3658 | /* Skip over `margin LOCATION'. */ | |
3659 | if (EQ (XCAR (prop), Qmargin)) | |
3660 | { | |
3661 | prop = XCDR (prop); | |
3662 | if (!CONSP (prop)) | |
3663 | return 0; | |
3664 | ||
3665 | prop = XCDR (prop); | |
3666 | if (!CONSP (prop)) | |
3667 | return 0; | |
3668 | } | |
2311178e | 3669 | |
74bd6d65 GM |
3670 | return CONSP (prop) && EQ (XCAR (prop), string); |
3671 | } | |
3672 | ||
3673 | ||
3674 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
3675 | ||
3676 | static int | |
3677 | display_prop_string_p (prop, string) | |
3678 | Lisp_Object prop, string; | |
3679 | { | |
74bd6d65 GM |
3680 | if (CONSP (prop) |
3681 | && CONSP (XCAR (prop)) | |
3682 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3683 | { | |
3684 | /* A list of sub-properties. */ | |
3685 | while (CONSP (prop)) | |
3686 | { | |
3687 | if (single_display_prop_string_p (XCAR (prop), string)) | |
3688 | return 1; | |
3689 | prop = XCDR (prop); | |
3690 | } | |
3691 | } | |
3692 | else if (VECTORP (prop)) | |
3693 | { | |
3694 | /* A vector of sub-properties. */ | |
3695 | int i; | |
3696 | for (i = 0; i < ASIZE (prop); ++i) | |
3697 | if (single_display_prop_string_p (AREF (prop, i), string)) | |
3698 | return 1; | |
3699 | } | |
3700 | else | |
3701 | return single_display_prop_string_p (prop, string); | |
3702 | ||
3703 | return 0; | |
3704 | } | |
3705 | ||
3706 | ||
3707 | /* Determine from which buffer position in W's buffer STRING comes | |
3708 | from. AROUND_CHARPOS is an approximate position where it could | |
3709 | be from. Value is the buffer position or 0 if it couldn't be | |
3710 | determined. | |
3711 | ||
3712 | W's buffer must be current. | |
3713 | ||
3714 | This function is necessary because we don't record buffer positions | |
3715 | in glyphs generated from strings (to keep struct glyph small). | |
3716 | This function may only use code that doesn't eval because it is | |
3717 | called asynchronously from note_mouse_highlight. */ | |
3718 | ||
3719 | int | |
3720 | string_buffer_position (w, string, around_charpos) | |
3721 | struct window *w; | |
3722 | Lisp_Object string; | |
3723 | int around_charpos; | |
3724 | { | |
74bd6d65 GM |
3725 | Lisp_Object limit, prop, pos; |
3726 | const int MAX_DISTANCE = 1000; | |
3727 | int found = 0; | |
3728 | ||
d8731202 | 3729 | pos = make_number (around_charpos); |
74bd6d65 GM |
3730 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
3731 | while (!found && !EQ (pos, limit)) | |
3732 | { | |
3733 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3734 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3735 | found = 1; | |
3736 | else | |
134d9283 | 3737 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
3738 | } |
3739 | ||
3740 | if (!found) | |
3741 | { | |
d8731202 | 3742 | pos = make_number (around_charpos); |
74bd6d65 GM |
3743 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
3744 | while (!found && !EQ (pos, limit)) | |
3745 | { | |
3746 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3747 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3748 | found = 1; | |
3749 | else | |
134d9283 GM |
3750 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
3751 | limit); | |
74bd6d65 GM |
3752 | } |
3753 | } | |
3754 | ||
3755 | return found ? XINT (pos) : 0; | |
3756 | } | |
3757 | ||
3758 | ||
5f5c8ee5 | 3759 | \f |
260a86a0 KH |
3760 | /*********************************************************************** |
3761 | `composition' property | |
3762 | ***********************************************************************/ | |
3763 | ||
3764 | /* Set up iterator IT from `composition' property at its current | |
3765 | position. Called from handle_stop. */ | |
3766 | ||
3767 | static enum prop_handled | |
3768 | handle_composition_prop (it) | |
3769 | struct it *it; | |
3770 | { | |
3771 | Lisp_Object prop, string; | |
3772 | int pos, pos_byte, end; | |
3773 | enum prop_handled handled = HANDLED_NORMALLY; | |
3774 | ||
3775 | if (STRINGP (it->string)) | |
3776 | { | |
3777 | pos = IT_STRING_CHARPOS (*it); | |
3778 | pos_byte = IT_STRING_BYTEPOS (*it); | |
3779 | string = it->string; | |
3780 | } | |
3781 | else | |
3782 | { | |
3783 | pos = IT_CHARPOS (*it); | |
3784 | pos_byte = IT_BYTEPOS (*it); | |
3785 | string = Qnil; | |
3786 | } | |
3787 | ||
3788 | /* If there's a valid composition and point is not inside of the | |
3789 | composition (in the case that the composition is from the current | |
3790 | buffer), draw a glyph composed from the composition components. */ | |
3791 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
3792 | && COMPOSITION_VALID_P (pos, end, prop) | |
3793 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
3794 | { | |
3795 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
3796 | ||
3797 | if (id >= 0) | |
3798 | { | |
3799 | it->method = next_element_from_composition; | |
3800 | it->cmp_id = id; | |
3801 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
3802 | /* For a terminal, draw only the first character of the | |
3803 | components. */ | |
3804 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
3805 | it->len = (STRINGP (it->string) | |
3806 | ? string_char_to_byte (it->string, end) | |
3807 | : CHAR_TO_BYTE (end)) - pos_byte; | |
3808 | it->stop_charpos = end; | |
3809 | handled = HANDLED_RETURN; | |
3810 | } | |
3811 | } | |
3812 | ||
3813 | return handled; | |
3814 | } | |
3815 | ||
3816 | ||
3817 | \f | |
5f5c8ee5 GM |
3818 | /*********************************************************************** |
3819 | Overlay strings | |
3820 | ***********************************************************************/ | |
3821 | ||
3822 | /* The following structure is used to record overlay strings for | |
3823 | later sorting in load_overlay_strings. */ | |
3824 | ||
3825 | struct overlay_entry | |
3826 | { | |
2970b9be | 3827 | Lisp_Object overlay; |
5f5c8ee5 GM |
3828 | Lisp_Object string; |
3829 | int priority; | |
3830 | int after_string_p; | |
3831 | }; | |
3832 | ||
3833 | ||
3834 | /* Set up iterator IT from overlay strings at its current position. | |
3835 | Called from handle_stop. */ | |
3836 | ||
3837 | static enum prop_handled | |
3838 | handle_overlay_change (it) | |
3839 | struct it *it; | |
3840 | { | |
5a08cbaf | 3841 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 3842 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 3843 | else |
2970b9be | 3844 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
3845 | } |
3846 | ||
3847 | ||
3848 | /* Set up the next overlay string for delivery by IT, if there is an | |
3849 | overlay string to deliver. Called by set_iterator_to_next when the | |
3850 | end of the current overlay string is reached. If there are more | |
3851 | overlay strings to display, IT->string and | |
3852 | IT->current.overlay_string_index are set appropriately here. | |
3853 | Otherwise IT->string is set to nil. */ | |
2311178e | 3854 | |
5f5c8ee5 GM |
3855 | static void |
3856 | next_overlay_string (it) | |
3857 | struct it *it; | |
3858 | { | |
3859 | ++it->current.overlay_string_index; | |
3860 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
3861 | { | |
3862 | /* No more overlay strings. Restore IT's settings to what | |
3863 | they were before overlay strings were processed, and | |
3864 | continue to deliver from current_buffer. */ | |
5a08cbaf | 3865 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
2311178e | 3866 | |
5f5c8ee5 GM |
3867 | pop_it (it); |
3868 | xassert (it->stop_charpos >= BEGV | |
3869 | && it->stop_charpos <= it->end_charpos); | |
3870 | it->string = Qnil; | |
3871 | it->current.overlay_string_index = -1; | |
3872 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
3873 | it->n_overlay_strings = 0; | |
3874 | it->method = next_element_from_buffer; | |
2970b9be GM |
3875 | |
3876 | /* If we're at the end of the buffer, record that we have | |
3877 | processed the overlay strings there already, so that | |
3878 | next_element_from_buffer doesn't try it again. */ | |
3879 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3880 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
3881 | |
3882 | /* If we have to display `...' for invisible text, set | |
3883 | the iterator up for that. */ | |
3884 | if (display_ellipsis_p) | |
3885 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3886 | } |
3887 | else | |
3888 | { | |
3889 | /* There are more overlay strings to process. If | |
3890 | IT->current.overlay_string_index has advanced to a position | |
3891 | where we must load IT->overlay_strings with more strings, do | |
3892 | it. */ | |
3893 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2311178e | 3894 | |
5f5c8ee5 | 3895 | if (it->current.overlay_string_index && i == 0) |
5a08cbaf | 3896 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
3897 | |
3898 | /* Initialize IT to deliver display elements from the overlay | |
3899 | string. */ | |
3900 | it->string = it->overlay_strings[i]; | |
3901 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3902 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
3903 | it->method = next_element_from_string; | |
3904 | it->stop_charpos = 0; | |
3905 | } | |
2311178e | 3906 | |
5f5c8ee5 GM |
3907 | CHECK_IT (it); |
3908 | } | |
3909 | ||
3910 | ||
3911 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
3912 | comparison function for qsort in load_overlay_strings. Overlay | |
3913 | strings for the same position are sorted so that | |
3914 | ||
2970b9be GM |
3915 | 1. All after-strings come in front of before-strings, except |
3916 | when they come from the same overlay. | |
2311178e | 3917 | |
5f5c8ee5 GM |
3918 | 2. Within after-strings, strings are sorted so that overlay strings |
3919 | from overlays with higher priorities come first. | |
3920 | ||
3921 | 2. Within before-strings, strings are sorted so that overlay | |
3922 | strings from overlays with higher priorities come last. | |
3923 | ||
3924 | Value is analogous to strcmp. */ | |
3925 | ||
2311178e | 3926 | |
5f5c8ee5 GM |
3927 | static int |
3928 | compare_overlay_entries (e1, e2) | |
3929 | void *e1, *e2; | |
3930 | { | |
3931 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
3932 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
3933 | int result; | |
3934 | ||
3935 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
3936 | { |
3937 | /* Let after-strings appear in front of before-strings if | |
3938 | they come from different overlays. */ | |
3939 | if (EQ (entry1->overlay, entry2->overlay)) | |
3940 | result = entry1->after_string_p ? 1 : -1; | |
3941 | else | |
3942 | result = entry1->after_string_p ? -1 : 1; | |
3943 | } | |
5f5c8ee5 GM |
3944 | else if (entry1->after_string_p) |
3945 | /* After-strings sorted in order of decreasing priority. */ | |
3946 | result = entry2->priority - entry1->priority; | |
3947 | else | |
3948 | /* Before-strings sorted in order of increasing priority. */ | |
3949 | result = entry1->priority - entry2->priority; | |
3950 | ||
3951 | return result; | |
3952 | } | |
3953 | ||
3954 | ||
3955 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
3956 | current buffer position, or from CHARPOS if that is > 0. Set |
3957 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
3958 | |
3959 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
3960 | a time. On entry into load_overlay_strings, | |
3961 | IT->current.overlay_string_index gives the number of overlay | |
3962 | strings that have already been loaded by previous calls to this | |
3963 | function. | |
3964 | ||
2970b9be GM |
3965 | IT->add_overlay_start contains an additional overlay start |
3966 | position to consider for taking overlay strings from, if non-zero. | |
3967 | This position comes into play when the overlay has an `invisible' | |
3968 | property, and both before and after-strings. When we've skipped to | |
3969 | the end of the overlay, because of its `invisible' property, we | |
3970 | nevertheless want its before-string to appear. | |
3971 | IT->add_overlay_start will contain the overlay start position | |
3972 | in this case. | |
3973 | ||
5f5c8ee5 GM |
3974 | Overlay strings are sorted so that after-string strings come in |
3975 | front of before-string strings. Within before and after-strings, | |
3976 | strings are sorted by overlay priority. See also function | |
3977 | compare_overlay_entries. */ | |
2311178e | 3978 | |
5f5c8ee5 | 3979 | static void |
5a08cbaf | 3980 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 3981 | struct it *it; |
5a08cbaf | 3982 | int charpos; |
5f5c8ee5 GM |
3983 | { |
3984 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
b7253a3e SM |
3985 | Lisp_Object overlay, window, str, invisible; |
3986 | struct Lisp_Overlay *ov; | |
5f5c8ee5 GM |
3987 | int start, end; |
3988 | int size = 20; | |
cafafe0b | 3989 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
3990 | struct overlay_entry *entries |
3991 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
3992 | |
3993 | if (charpos <= 0) | |
3994 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
3995 | |
3996 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
3997 | `entries' which has size `size' and currently contains `n' | |
3998 | elements. AFTER_P non-zero means STRING is an after-string of | |
3999 | OVERLAY. */ | |
4000 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
4001 | do \ | |
4002 | { \ | |
4003 | Lisp_Object priority; \ | |
4004 | \ | |
4005 | if (n == size) \ | |
4006 | { \ | |
4007 | int new_size = 2 * size; \ | |
4008 | struct overlay_entry *old = entries; \ | |
4009 | entries = \ | |
4010 | (struct overlay_entry *) alloca (new_size \ | |
4011 | * sizeof *entries); \ | |
4012 | bcopy (old, entries, size * sizeof *entries); \ | |
4013 | size = new_size; \ | |
4014 | } \ | |
4015 | \ | |
4016 | entries[n].string = (STRING); \ | |
2970b9be | 4017 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 4018 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 4019 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
4020 | entries[n].after_string_p = (AFTER_P); \ |
4021 | ++n; \ | |
4022 | } \ | |
4023 | while (0) | |
4024 | ||
4025 | /* Process overlay before the overlay center. */ | |
b7253a3e | 4026 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
5f5c8ee5 | 4027 | { |
b7253a3e | 4028 | XSETMISC (overlay, ov); |
5f5c8ee5 GM |
4029 | xassert (OVERLAYP (overlay)); |
4030 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
4031 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2311178e | 4032 | |
cafafe0b | 4033 | if (end < charpos) |
5f5c8ee5 GM |
4034 | break; |
4035 | ||
4036 | /* Skip this overlay if it doesn't start or end at IT's current | |
4037 | position. */ | |
cafafe0b | 4038 | if (end != charpos && start != charpos) |
5f5c8ee5 | 4039 | continue; |
2311178e | 4040 | |
5f5c8ee5 GM |
4041 | /* Skip this overlay if it doesn't apply to IT->w. */ |
4042 | window = Foverlay_get (overlay, Qwindow); | |
4043 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
4044 | continue; | |
4045 | ||
cafafe0b GM |
4046 | /* If the text ``under'' the overlay is invisible, both before- |
4047 | and after-strings from this overlay are visible; start and | |
4048 | end position are indistinguishable. */ | |
4049 | invisible = Foverlay_get (overlay, Qinvisible); | |
4050 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
4051 | ||
5f5c8ee5 | 4052 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 4053 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 4054 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 4055 | && SCHARS (str)) |
5f5c8ee5 | 4056 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 4057 | |
5f5c8ee5 | 4058 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 4059 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 4060 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 4061 | && SCHARS (str)) |
5f5c8ee5 GM |
4062 | RECORD_OVERLAY_STRING (overlay, str, 1); |
4063 | } | |
2311178e | 4064 | |
5f5c8ee5 | 4065 | /* Process overlays after the overlay center. */ |
b7253a3e | 4066 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
5f5c8ee5 | 4067 | { |
b7253a3e | 4068 | XSETMISC (overlay, ov); |
5f5c8ee5 GM |
4069 | xassert (OVERLAYP (overlay)); |
4070 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
4071 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
4072 | ||
cafafe0b | 4073 | if (start > charpos) |
5f5c8ee5 | 4074 | break; |
2311178e | 4075 | |
5f5c8ee5 GM |
4076 | /* Skip this overlay if it doesn't start or end at IT's current |
4077 | position. */ | |
cafafe0b | 4078 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
4079 | continue; |
4080 | ||
4081 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
4082 | window = Foverlay_get (overlay, Qwindow); | |
4083 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
4084 | continue; | |
2311178e | 4085 | |
cafafe0b GM |
4086 | /* If the text ``under'' the overlay is invisible, it has a zero |
4087 | dimension, and both before- and after-strings apply. */ | |
4088 | invisible = Foverlay_get (overlay, Qinvisible); | |
4089 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
4090 | ||
5f5c8ee5 | 4091 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 4092 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 4093 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 4094 | && SCHARS (str)) |
5f5c8ee5 | 4095 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 4096 | |
5f5c8ee5 | 4097 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 4098 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 4099 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 4100 | && SCHARS (str)) |
5f5c8ee5 GM |
4101 | RECORD_OVERLAY_STRING (overlay, str, 1); |
4102 | } | |
4103 | ||
4104 | #undef RECORD_OVERLAY_STRING | |
2311178e | 4105 | |
5f5c8ee5 | 4106 | /* Sort entries. */ |
cafafe0b | 4107 | if (n > 1) |
2970b9be | 4108 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
4109 | |
4110 | /* Record the total number of strings to process. */ | |
4111 | it->n_overlay_strings = n; | |
4112 | ||
4113 | /* IT->current.overlay_string_index is the number of overlay strings | |
4114 | that have already been consumed by IT. Copy some of the | |
4115 | remaining overlay strings to IT->overlay_strings. */ | |
4116 | i = 0; | |
4117 | j = it->current.overlay_string_index; | |
4118 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
4119 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 4120 | |
5f5c8ee5 GM |
4121 | CHECK_IT (it); |
4122 | } | |
4123 | ||
4124 | ||
4125 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
4126 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
4127 | least one overlay string was found. */ | |
5f5c8ee5 GM |
4128 | |
4129 | static int | |
5a08cbaf | 4130 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 4131 | struct it *it; |
5a08cbaf | 4132 | int charpos; |
5f5c8ee5 GM |
4133 | { |
4134 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
4135 | process. This fills IT->overlay_strings with strings, and sets | |
4136 | IT->n_overlay_strings to the total number of strings to process. | |
4137 | IT->pos.overlay_string_index has to be set temporarily to zero | |
4138 | because load_overlay_strings needs this; it must be set to -1 | |
4139 | when no overlay strings are found because a zero value would | |
4140 | indicate a position in the first overlay string. */ | |
4141 | it->current.overlay_string_index = 0; | |
5a08cbaf | 4142 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
4143 | |
4144 | /* If we found overlay strings, set up IT to deliver display | |
4145 | elements from the first one. Otherwise set up IT to deliver | |
4146 | from current_buffer. */ | |
4147 | if (it->n_overlay_strings) | |
4148 | { | |
4149 | /* Make sure we know settings in current_buffer, so that we can | |
4150 | restore meaningful values when we're done with the overlay | |
4151 | strings. */ | |
4152 | compute_stop_pos (it); | |
4153 | xassert (it->face_id >= 0); | |
2311178e | 4154 | |
5f5c8ee5 GM |
4155 | /* Save IT's settings. They are restored after all overlay |
4156 | strings have been processed. */ | |
4157 | xassert (it->sp == 0); | |
4158 | push_it (it); | |
4159 | ||
4160 | /* Set up IT to deliver display elements from the first overlay | |
4161 | string. */ | |
4162 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 4163 | it->string = it->overlay_strings[0]; |
b2046df8 | 4164 | it->stop_charpos = 0; |
5f5c8ee5 | 4165 | xassert (STRINGP (it->string)); |
2051c264 | 4166 | it->end_charpos = SCHARS (it->string); |
d5db4077 | 4167 | it->multibyte_p = STRING_MULTIBYTE (it->string); |
5f5c8ee5 GM |
4168 | it->method = next_element_from_string; |
4169 | } | |
4170 | else | |
4171 | { | |
4172 | it->string = Qnil; | |
4173 | it->current.overlay_string_index = -1; | |
4174 | it->method = next_element_from_buffer; | |
4175 | } | |
4176 | ||
4177 | CHECK_IT (it); | |
4178 | ||
4179 | /* Value is non-zero if we found at least one overlay string. */ | |
4180 | return STRINGP (it->string); | |
4181 | } | |
4182 | ||
4183 | ||
4184 | \f | |
4185 | /*********************************************************************** | |
4186 | Saving and restoring state | |
4187 | ***********************************************************************/ | |
4188 | ||
4189 | /* Save current settings of IT on IT->stack. Called, for example, | |
4190 | before setting up IT for an overlay string, to be able to restore | |
4191 | IT's settings to what they were after the overlay string has been | |
4192 | processed. */ | |
4193 | ||
4194 | static void | |
4195 | push_it (it) | |
4196 | struct it *it; | |
4197 | { | |
4198 | struct iterator_stack_entry *p; | |
2311178e | 4199 | |
5f5c8ee5 GM |
4200 | xassert (it->sp < 2); |
4201 | p = it->stack + it->sp; | |
4202 | ||
4203 | p->stop_charpos = it->stop_charpos; | |
4204 | xassert (it->face_id >= 0); | |
4205 | p->face_id = it->face_id; | |
4206 | p->string = it->string; | |
4207 | p->pos = it->current; | |
4208 | p->end_charpos = it->end_charpos; | |
4209 | p->string_nchars = it->string_nchars; | |
4210 | p->area = it->area; | |
4211 | p->multibyte_p = it->multibyte_p; | |
4212 | p->space_width = it->space_width; | |
4213 | p->font_height = it->font_height; | |
4214 | p->voffset = it->voffset; | |
4215 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 4216 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
4217 | ++it->sp; |
4218 | } | |
4219 | ||
4220 | ||
4221 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
4222 | more overlay strings must be processed, and we return to delivering | |
4223 | display elements from a buffer, or when the end of a string from a | |
4224 | `display' property is reached and we return to delivering display | |
4225 | elements from an overlay string, or from a buffer. */ | |
4226 | ||
4227 | static void | |
4228 | pop_it (it) | |
4229 | struct it *it; | |
4230 | { | |
4231 | struct iterator_stack_entry *p; | |
2311178e | 4232 | |
5f5c8ee5 GM |
4233 | xassert (it->sp > 0); |
4234 | --it->sp; | |
4235 | p = it->stack + it->sp; | |
4236 | it->stop_charpos = p->stop_charpos; | |
4237 | it->face_id = p->face_id; | |
4238 | it->string = p->string; | |
4239 | it->current = p->pos; | |
4240 | it->end_charpos = p->end_charpos; | |
4241 | it->string_nchars = p->string_nchars; | |
4242 | it->area = p->area; | |
4243 | it->multibyte_p = p->multibyte_p; | |
4244 | it->space_width = p->space_width; | |
4245 | it->font_height = p->font_height; | |
4246 | it->voffset = p->voffset; | |
4247 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
4248 | } | |
4249 | ||
4250 | ||
4251 | \f | |
4252 | /*********************************************************************** | |
4253 | Moving over lines | |
4254 | ***********************************************************************/ | |
4255 | ||
4256 | /* Set IT's current position to the previous line start. */ | |
4257 | ||
4258 | static void | |
4259 | back_to_previous_line_start (it) | |
4260 | struct it *it; | |
4261 | { | |
4262 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
4263 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
4264 | } | |
4265 | ||
4266 | ||
cafafe0b | 4267 | /* Move IT to the next line start. |
2311178e | 4268 | |
cafafe0b GM |
4269 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if |
4270 | we skipped over part of the text (as opposed to moving the iterator | |
4271 | continuously over the text). Otherwise, don't change the value | |
4272 | of *SKIPPED_P. | |
2311178e | 4273 | |
cafafe0b GM |
4274 | Newlines may come from buffer text, overlay strings, or strings |
4275 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
4276 | simply use find_next_newline_no_quit. |
4277 | ||
4278 | Note that this function may not skip over invisible text that is so | |
4279 | because of text properties and immediately follows a newline. If | |
4280 | it would, function reseat_at_next_visible_line_start, when called | |
4281 | from set_iterator_to_next, would effectively make invisible | |
4282 | characters following a newline part of the wrong glyph row, which | |
4283 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 4284 | |
cafafe0b GM |
4285 | static int |
4286 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 4287 | struct it *it; |
cafafe0b | 4288 | int *skipped_p; |
5f5c8ee5 | 4289 | { |
54918e2b | 4290 | int old_selective, newline_found_p, n; |
cafafe0b GM |
4291 | const int MAX_NEWLINE_DISTANCE = 500; |
4292 | ||
0fd37545 GM |
4293 | /* If already on a newline, just consume it to avoid unintended |
4294 | skipping over invisible text below. */ | |
51695746 GM |
4295 | if (it->what == IT_CHARACTER |
4296 | && it->c == '\n' | |
4297 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
4298 | { |
4299 | set_iterator_to_next (it, 0); | |
a77dc1ec | 4300 | it->c = 0; |
0fd37545 GM |
4301 | return 1; |
4302 | } | |
4303 | ||
54918e2b | 4304 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
4305 | unnecessary because it's done by the caller, and (b) leads to an |
4306 | infinite recursion because next_element_from_ellipsis indirectly | |
4307 | calls this function. */ | |
54918e2b GM |
4308 | old_selective = it->selective; |
4309 | it->selective = 0; | |
4310 | ||
cafafe0b GM |
4311 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
4312 | from buffer text. */ | |
3aec8722 GM |
4313 | for (n = newline_found_p = 0; |
4314 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
4315 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 4316 | { |
8692ca92 | 4317 | if (!get_next_display_element (it)) |
d43be70c | 4318 | return 0; |
d02f1cb8 | 4319 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 4320 | set_iterator_to_next (it, 0); |
cafafe0b GM |
4321 | } |
4322 | ||
4323 | /* If we didn't find a newline near enough, see if we can use a | |
4324 | short-cut. */ | |
db0bb807 | 4325 | if (!newline_found_p) |
cafafe0b GM |
4326 | { |
4327 | int start = IT_CHARPOS (*it); | |
4328 | int limit = find_next_newline_no_quit (start, 1); | |
4329 | Lisp_Object pos; | |
4330 | ||
4331 | xassert (!STRINGP (it->string)); | |
4332 | ||
4333 | /* If there isn't any `display' property in sight, and no | |
4334 | overlays, we can just use the position of the newline in | |
4335 | buffer text. */ | |
4336 | if (it->stop_charpos >= limit | |
4337 | || ((pos = Fnext_single_property_change (make_number (start), | |
4338 | Qdisplay, | |
4339 | Qnil, make_number (limit)), | |
4340 | NILP (pos)) | |
4341 | && next_overlay_change (start) == ZV)) | |
4342 | { | |
4343 | IT_CHARPOS (*it) = limit; | |
4344 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
4345 | *skipped_p = newline_found_p = 1; | |
4346 | } | |
4347 | else | |
4348 | { | |
4349 | while (get_next_display_element (it) | |
4350 | && !newline_found_p) | |
4351 | { | |
4352 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
4353 | set_iterator_to_next (it, 0); | |
4354 | } | |
4355 | } | |
4356 | } | |
4357 | ||
54918e2b | 4358 | it->selective = old_selective; |
cafafe0b | 4359 | return newline_found_p; |
5f5c8ee5 GM |
4360 | } |
4361 | ||
4362 | ||
4363 | /* Set IT's current position to the previous visible line start. Skip | |
4364 | invisible text that is so either due to text properties or due to | |
4365 | selective display. Caution: this does not change IT->current_x and | |
4366 | IT->hpos. */ | |
4367 | ||
4368 | static void | |
4369 | back_to_previous_visible_line_start (it) | |
4370 | struct it *it; | |
4371 | { | |
4372 | int visible_p = 0; | |
4373 | ||
4374 | /* Go back one newline if not on BEGV already. */ | |
4375 | if (IT_CHARPOS (*it) > BEGV) | |
4376 | back_to_previous_line_start (it); | |
4377 | ||
4378 | /* Move over lines that are invisible because of selective display | |
4379 | or text properties. */ | |
4380 | while (IT_CHARPOS (*it) > BEGV | |
4381 | && !visible_p) | |
4382 | { | |
4383 | visible_p = 1; | |
4384 | ||
4385 | /* If selective > 0, then lines indented more than that values | |
4386 | are invisible. */ | |
4387 | if (it->selective > 0 | |
4388 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
a67e162b | 4389 | (double) it->selective)) /* iftc */ |
5f5c8ee5 | 4390 | visible_p = 0; |
2311178e | 4391 | else |
5f5c8ee5 GM |
4392 | { |
4393 | Lisp_Object prop; | |
4394 | ||
6fc556fd KR |
4395 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
4396 | Qinvisible, it->window); | |
5f5c8ee5 GM |
4397 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
4398 | visible_p = 0; | |
4399 | } | |
5f5c8ee5 GM |
4400 | |
4401 | /* Back one more newline if the current one is invisible. */ | |
4402 | if (!visible_p) | |
4403 | back_to_previous_line_start (it); | |
4404 | } | |
4405 | ||
4406 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4407 | xassert (IT_CHARPOS (*it) == BEGV | |
4408 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
4409 | CHECK_IT (it); | |
4410 | } | |
4411 | ||
4412 | ||
4413 | /* Reseat iterator IT at the previous visible line start. Skip | |
4414 | invisible text that is so either due to text properties or due to | |
4415 | selective display. At the end, update IT's overlay information, | |
4416 | face information etc. */ | |
4417 | ||
4418 | static void | |
4419 | reseat_at_previous_visible_line_start (it) | |
4420 | struct it *it; | |
4421 | { | |
4422 | back_to_previous_visible_line_start (it); | |
4423 | reseat (it, it->current.pos, 1); | |
4424 | CHECK_IT (it); | |
4425 | } | |
4426 | ||
4427 | ||
4428 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
4429 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
4430 | preceding the line start. Skip over invisible text that is so | |
4431 | because of selective display. Compute faces, overlays etc at the | |
4432 | new position. Note that this function does not skip over text that | |
4433 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
4434 | |
4435 | static void | |
312246d1 | 4436 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 4437 | struct it *it; |
312246d1 | 4438 | int on_newline_p; |
5f5c8ee5 | 4439 | { |
cafafe0b GM |
4440 | int newline_found_p, skipped_p = 0; |
4441 | ||
4442 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
4443 | ||
4444 | /* Skip over lines that are invisible because they are indented | |
4445 | more than the value of IT->selective. */ | |
4446 | if (it->selective > 0) | |
4447 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 4448 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
a67e162b | 4449 | (double) it->selective)) /* iftc */ |
a77dc1ec GM |
4450 | { |
4451 | xassert (FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
4452 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
4453 | } | |
cafafe0b GM |
4454 | |
4455 | /* Position on the newline if that's what's requested. */ | |
4456 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 4457 | { |
cafafe0b | 4458 | if (STRINGP (it->string)) |
5f5c8ee5 | 4459 | { |
cafafe0b GM |
4460 | if (IT_STRING_CHARPOS (*it) > 0) |
4461 | { | |
4462 | --IT_STRING_CHARPOS (*it); | |
4463 | --IT_STRING_BYTEPOS (*it); | |
4464 | } | |
5f5c8ee5 | 4465 | } |
cafafe0b | 4466 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
4467 | { |
4468 | --IT_CHARPOS (*it); | |
cafafe0b GM |
4469 | --IT_BYTEPOS (*it); |
4470 | reseat (it, it->current.pos, 0); | |
312246d1 | 4471 | } |
5f5c8ee5 | 4472 | } |
cafafe0b GM |
4473 | else if (skipped_p) |
4474 | reseat (it, it->current.pos, 0); | |
2311178e | 4475 | |
5f5c8ee5 GM |
4476 | CHECK_IT (it); |
4477 | } | |
4478 | ||
4479 | ||
4480 | \f | |
4481 | /*********************************************************************** | |
4482 | Changing an iterator's position | |
4483 | ***********************************************************************/ | |
4484 | ||
4485 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
4486 | is non-zero, always check for text properties at the new position. | |
4487 | Otherwise, text properties are only looked up if POS >= | |
4488 | IT->check_charpos of a property. */ | |
4489 | ||
4490 | static void | |
4491 | reseat (it, pos, force_p) | |
4492 | struct it *it; | |
4493 | struct text_pos pos; | |
4494 | int force_p; | |
4495 | { | |
4496 | int original_pos = IT_CHARPOS (*it); | |
4497 | ||
4498 | reseat_1 (it, pos, 0); | |
4499 | ||
4500 | /* Determine where to check text properties. Avoid doing it | |
4501 | where possible because text property lookup is very expensive. */ | |
4502 | if (force_p | |
4503 | || CHARPOS (pos) > it->stop_charpos | |
4504 | || CHARPOS (pos) < original_pos) | |
4505 | handle_stop (it); | |
4506 | ||
4507 | CHECK_IT (it); | |
4508 | } | |
4509 | ||
4510 | ||
4511 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
4512 | IT->stop_pos to POS, also. */ | |
4513 | ||
4514 | static void | |
4515 | reseat_1 (it, pos, set_stop_p) | |
4516 | struct it *it; | |
4517 | struct text_pos pos; | |
4518 | int set_stop_p; | |
4519 | { | |
4520 | /* Don't call this function when scanning a C string. */ | |
4521 | xassert (it->s == NULL); | |
4522 | ||
4523 | /* POS must be a reasonable value. */ | |
4524 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
4525 | ||
4526 | it->current.pos = it->position = pos; | |
4527 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 4528 | it->end_charpos = ZV; |
5f5c8ee5 GM |
4529 | it->dpvec = NULL; |
4530 | it->current.dpvec_index = -1; | |
4531 | it->current.overlay_string_index = -1; | |
4532 | IT_STRING_CHARPOS (*it) = -1; | |
4533 | IT_STRING_BYTEPOS (*it) = -1; | |
4534 | it->string = Qnil; | |
4535 | it->method = next_element_from_buffer; | |
5905025c RS |
4536 | /* RMS: I added this to fix a bug in move_it_vertically_backward |
4537 | where it->area continued to relate to the starting point | |
4538 | for the backward motion. Bug report from | |
4539 | Nick Roberts <nick@nick.uklinux.net> on 19 May 2003. | |
4540 | However, I am not sure whether reseat still does the right thing | |
4541 | in general after this change. */ | |
4542 | it->area = TEXT_AREA; | |
06fd3792 | 4543 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 4544 | it->sp = 0; |
4aad61f8 | 4545 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
4546 | |
4547 | if (set_stop_p) | |
4548 | it->stop_charpos = CHARPOS (pos); | |
4549 | } | |
4550 | ||
4551 | ||
4552 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
4553 | If S is non-null, it is a C string to iterate over. Otherwise, | |
4554 | STRING gives a Lisp string to iterate over. | |
2311178e | 4555 | |
5f5c8ee5 GM |
4556 | If PRECISION > 0, don't return more then PRECISION number of |
4557 | characters from the string. | |
4558 | ||
4559 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
4560 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
4561 | field width. | |
4562 | ||
4563 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
4564 | MULTIBYTE > 0 means enable it, | |
4565 | MULTIBYTE < 0 means use IT->multibyte_p. | |
4566 | ||
4567 | IT must be initialized via a prior call to init_iterator before | |
4568 | calling this function. */ | |
4569 | ||
4570 | static void | |
4571 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
4572 | struct it *it; | |
4573 | unsigned char *s; | |
4574 | Lisp_Object string; | |
4575 | int charpos; | |
4576 | int precision, field_width, multibyte; | |
4577 | { | |
4578 | /* No region in strings. */ | |
4579 | it->region_beg_charpos = it->region_end_charpos = -1; | |
4580 | ||
4581 | /* No text property checks performed by default, but see below. */ | |
4582 | it->stop_charpos = -1; | |
4583 | ||
4584 | /* Set iterator position and end position. */ | |
4585 | bzero (&it->current, sizeof it->current); | |
4586 | it->current.overlay_string_index = -1; | |
4587 | it->current.dpvec_index = -1; | |
5f5c8ee5 | 4588 | xassert (charpos >= 0); |
2311178e | 4589 | |
e719f5ae GM |
4590 | /* If STRING is specified, use its multibyteness, otherwise use the |
4591 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 4592 | if (multibyte >= 0) |
5f5c8ee5 | 4593 | it->multibyte_p = multibyte > 0; |
2311178e | 4594 | |
5f5c8ee5 GM |
4595 | if (s == NULL) |
4596 | { | |
4597 | xassert (STRINGP (string)); | |
4598 | it->string = string; | |
4599 | it->s = NULL; | |
2051c264 | 4600 | it->end_charpos = it->string_nchars = SCHARS (string); |
5f5c8ee5 GM |
4601 | it->method = next_element_from_string; |
4602 | it->current.string_pos = string_pos (charpos, string); | |
4603 | } | |
4604 | else | |
4605 | { | |
4606 | it->s = s; | |
4607 | it->string = Qnil; | |
4608 | ||
4609 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
4610 | for displaying C strings. */ | |
4611 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
4612 | if (it->multibyte_p) | |
4613 | { | |
4614 | it->current.pos = c_string_pos (charpos, s, 1); | |
4615 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
4616 | } | |
4617 | else | |
4618 | { | |
4619 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
4620 | it->end_charpos = it->string_nchars = strlen (s); | |
4621 | } | |
2311178e | 4622 | |
5f5c8ee5 GM |
4623 | it->method = next_element_from_c_string; |
4624 | } | |
4625 | ||
4626 | /* PRECISION > 0 means don't return more than PRECISION characters | |
4627 | from the string. */ | |
4628 | if (precision > 0 && it->end_charpos - charpos > precision) | |
4629 | it->end_charpos = it->string_nchars = charpos + precision; | |
4630 | ||
4631 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
4632 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
4633 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
4634 | padding with `-' at the end of a mode line. */ | |
4635 | if (field_width < 0) | |
4636 | field_width = INFINITY; | |
4637 | if (field_width > it->end_charpos - charpos) | |
4638 | it->end_charpos = charpos + field_width; | |
4639 | ||
4640 | /* Use the standard display table for displaying strings. */ | |
4641 | if (DISP_TABLE_P (Vstandard_display_table)) | |
4642 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
4643 | ||
4644 | it->stop_charpos = charpos; | |
4645 | CHECK_IT (it); | |
4646 | } | |
4647 | ||
4648 | ||
4649 | \f | |
4650 | /*********************************************************************** | |
4651 | Iteration | |
4652 | ***********************************************************************/ | |
4653 | ||
4654 | /* Load IT's display element fields with information about the next | |
4655 | display element from the current position of IT. Value is zero if | |
4656 | end of buffer (or C string) is reached. */ | |
4657 | ||
4658 | int | |
4659 | get_next_display_element (it) | |
4660 | struct it *it; | |
4661 | { | |
7d0393cf | 4662 | /* Non-zero means that we found a display element. Zero means that |
5f5c8ee5 GM |
4663 | we hit the end of what we iterate over. Performance note: the |
4664 | function pointer `method' used here turns out to be faster than | |
4665 | using a sequence of if-statements. */ | |
4666 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
4667 | |
4668 | if (it->what == IT_CHARACTER) | |
4669 | { | |
4670 | /* Map via display table or translate control characters. | |
4671 | IT->c, IT->len etc. have been set to the next character by | |
4672 | the function call above. If we have a display table, and it | |
4673 | contains an entry for IT->c, translate it. Don't do this if | |
4674 | IT->c itself comes from a display table, otherwise we could | |
4675 | end up in an infinite recursion. (An alternative could be to | |
4676 | count the recursion depth of this function and signal an | |
4677 | error when a certain maximum depth is reached.) Is it worth | |
4678 | it? */ | |
4679 | if (success_p && it->dpvec == NULL) | |
4680 | { | |
4681 | Lisp_Object dv; | |
4682 | ||
4683 | if (it->dp | |
4684 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
4685 | VECTORP (dv))) | |
4686 | { | |
4687 | struct Lisp_Vector *v = XVECTOR (dv); | |
4688 | ||
4689 | /* Return the first character from the display table | |
4690 | entry, if not empty. If empty, don't display the | |
4691 | current character. */ | |
4692 | if (v->size) | |
4693 | { | |
4694 | it->dpvec_char_len = it->len; | |
4695 | it->dpvec = v->contents; | |
4696 | it->dpend = v->contents + v->size; | |
4697 | it->current.dpvec_index = 0; | |
4698 | it->method = next_element_from_display_vector; | |
7eee47cc GM |
4699 | success_p = get_next_display_element (it); |
4700 | } | |
4701 | else | |
4702 | { | |
4703 | set_iterator_to_next (it, 0); | |
4704 | success_p = get_next_display_element (it); | |
5f5c8ee5 | 4705 | } |
5f5c8ee5 GM |
4706 | } |
4707 | ||
4708 | /* Translate control characters into `\003' or `^C' form. | |
4709 | Control characters coming from a display table entry are | |
4710 | currently not translated because we use IT->dpvec to hold | |
4711 | the translation. This could easily be changed but I | |
197516c2 KH |
4712 | don't believe that it is worth doing. |
4713 | ||
fa831cf8 KH |
4714 | If it->multibyte_p is nonzero, eight-bit characters and |
4715 | non-printable multibyte characters are also translated to | |
4716 | octal form. | |
4717 | ||
4718 | If it->multibyte_p is zero, eight-bit characters that | |
4719 | don't have corresponding multibyte char code are also | |
4720 | translated to octal form. */ | |
ba197fe6 | 4721 | else if ((it->c < ' ' |
5f5c8ee5 | 4722 | && (it->area != TEXT_AREA |
c6e89d6c | 4723 | || (it->c != '\n' && it->c != '\t'))) |
fa831cf8 KH |
4724 | || (it->multibyte_p |
4725 | ? ((it->c >= 127 | |
4726 | && it->len == 1) | |
4727 | || !CHAR_PRINTABLE_P (it->c)) | |
ba197fe6 | 4728 | : (it->c >= 127 |
fa831cf8 | 4729 | && it->c == unibyte_char_to_multibyte (it->c)))) |
5f5c8ee5 GM |
4730 | { |
4731 | /* IT->c is a control character which must be displayed | |
4732 | either as '\003' or as `^C' where the '\\' and '^' | |
4733 | can be defined in the display table. Fill | |
4734 | IT->ctl_chars with glyphs for what we have to | |
4735 | display. Then, set IT->dpvec to these glyphs. */ | |
4736 | GLYPH g; | |
4737 | ||
54c85a23 | 4738 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
4739 | { |
4740 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
4741 | if (it->dp | |
4742 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
4743 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
4744 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
4745 | else | |
4746 | g = FAST_MAKE_GLYPH ('^', 0); | |
4747 | XSETINT (it->ctl_chars[0], g); | |
4748 | ||
4749 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
4750 | XSETINT (it->ctl_chars[1], g); | |
4751 | ||
4752 | /* Set up IT->dpvec and return first character from it. */ | |
4753 | it->dpvec_char_len = it->len; | |
4754 | it->dpvec = it->ctl_chars; | |
4755 | it->dpend = it->dpvec + 2; | |
4756 | it->current.dpvec_index = 0; | |
4757 | it->method = next_element_from_display_vector; | |
4758 | get_next_display_element (it); | |
4759 | } | |
4760 | else | |
4761 | { | |
260a86a0 | 4762 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 4763 | int len; |
197516c2 KH |
4764 | int i; |
4765 | GLYPH escape_glyph; | |
4766 | ||
5f5c8ee5 GM |
4767 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
4768 | if (it->dp | |
4769 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
4770 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 4771 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 4772 | else |
197516c2 KH |
4773 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
4774 | ||
c5924f47 KH |
4775 | if (SINGLE_BYTE_CHAR_P (it->c)) |
4776 | str[0] = it->c, len = 1; | |
4777 | else | |
ea9dd091 GM |
4778 | { |
4779 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
4780 | if (len < 0) | |
4781 | { | |
4782 | /* It's an invalid character, which | |
4783 | shouldn't happen actually, but due to | |
4784 | bugs it may happen. Let's print the char | |
4785 | as is, there's not much meaningful we can | |
4786 | do with it. */ | |
4787 | str[0] = it->c; | |
4788 | str[1] = it->c >> 8; | |
4789 | str[2] = it->c >> 16; | |
4790 | str[3] = it->c >> 24; | |
4791 | len = 4; | |
4792 | } | |
4793 | } | |
c5924f47 | 4794 | |
197516c2 KH |
4795 | for (i = 0; i < len; i++) |
4796 | { | |
4797 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
4798 | /* Insert three more glyphs into IT->ctl_chars for | |
4799 | the octal display of the character. */ | |
2311178e | 4800 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); |
197516c2 | 4801 | XSETINT (it->ctl_chars[i * 4 + 1], g); |
2311178e | 4802 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); |
197516c2 | 4803 | XSETINT (it->ctl_chars[i * 4 + 2], g); |
2311178e | 4804 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); |
197516c2 KH |
4805 | XSETINT (it->ctl_chars[i * 4 + 3], g); |
4806 | } | |
5f5c8ee5 GM |
4807 | |
4808 | /* Set up IT->dpvec and return the first character | |
4809 | from it. */ | |
4810 | it->dpvec_char_len = it->len; | |
4811 | it->dpvec = it->ctl_chars; | |
197516c2 | 4812 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
4813 | it->current.dpvec_index = 0; |
4814 | it->method = next_element_from_display_vector; | |
4815 | get_next_display_element (it); | |
4816 | } | |
4817 | } | |
4818 | } | |
4819 | ||
980806b6 KH |
4820 | /* Adjust face id for a multibyte character. There are no |
4821 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
4822 | if (it->multibyte_p |
4823 | && success_p | |
980806b6 | 4824 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 4825 | { |
980806b6 KH |
4826 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
4827 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
4828 | } |
4829 | } | |
4830 | ||
4831 | /* Is this character the last one of a run of characters with | |
4832 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
4833 | if (it->face_box_p | |
4834 | && it->s == NULL) | |
4835 | { | |
4836 | int face_id; | |
4837 | struct face *face; | |
4838 | ||
4839 | it->end_of_box_run_p | |
4840 | = ((face_id = face_after_it_pos (it), | |
4841 | face_id != it->face_id) | |
4842 | && (face = FACE_FROM_ID (it->f, face_id), | |
4843 | face->box == FACE_NO_BOX)); | |
4844 | } | |
4845 | ||
4846 | /* Value is 0 if end of buffer or string reached. */ | |
4847 | return success_p; | |
4848 | } | |
4849 | ||
4850 | ||
4851 | /* Move IT to the next display element. | |
4852 | ||
cafafe0b GM |
4853 | RESEAT_P non-zero means if called on a newline in buffer text, |
4854 | skip to the next visible line start. | |
4855 | ||
5f5c8ee5 GM |
4856 | Functions get_next_display_element and set_iterator_to_next are |
4857 | separate because I find this arrangement easier to handle than a | |
4858 | get_next_display_element function that also increments IT's | |
4859 | position. The way it is we can first look at an iterator's current | |
4860 | display element, decide whether it fits on a line, and if it does, | |
4861 | increment the iterator position. The other way around we probably | |
4862 | would either need a flag indicating whether the iterator has to be | |
4863 | incremented the next time, or we would have to implement a | |
4864 | decrement position function which would not be easy to write. */ | |
4865 | ||
4866 | void | |
cafafe0b | 4867 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 4868 | struct it *it; |
cafafe0b | 4869 | int reseat_p; |
5f5c8ee5 | 4870 | { |
483de32b GM |
4871 | /* Reset flags indicating start and end of a sequence of characters |
4872 | with box. Reset them at the start of this function because | |
4873 | moving the iterator to a new position might set them. */ | |
4874 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
2311178e | 4875 | |
5f5c8ee5 GM |
4876 | if (it->method == next_element_from_buffer) |
4877 | { | |
4878 | /* The current display element of IT is a character from | |
4879 | current_buffer. Advance in the buffer, and maybe skip over | |
4880 | invisible lines that are so because of selective display. */ | |
cafafe0b | 4881 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 4882 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4883 | else |
4884 | { | |
4885 | xassert (it->len != 0); | |
4886 | IT_BYTEPOS (*it) += it->len; | |
4887 | IT_CHARPOS (*it) += 1; | |
4888 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
4889 | } | |
4890 | } | |
260a86a0 KH |
4891 | else if (it->method == next_element_from_composition) |
4892 | { | |
4893 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
4894 | if (STRINGP (it->string)) | |
4895 | { | |
4896 | IT_STRING_BYTEPOS (*it) += it->len; | |
4897 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
4898 | it->method = next_element_from_string; | |
4899 | goto consider_string_end; | |
4900 | } | |
4901 | else | |
4902 | { | |
4903 | IT_BYTEPOS (*it) += it->len; | |
4904 | IT_CHARPOS (*it) += it->cmp_len; | |
4905 | it->method = next_element_from_buffer; | |
4906 | } | |
4907 | } | |
5f5c8ee5 GM |
4908 | else if (it->method == next_element_from_c_string) |
4909 | { | |
4910 | /* Current display element of IT is from a C string. */ | |
4911 | IT_BYTEPOS (*it) += it->len; | |
4912 | IT_CHARPOS (*it) += 1; | |
4913 | } | |
4914 | else if (it->method == next_element_from_display_vector) | |
4915 | { | |
4916 | /* Current display element of IT is from a display table entry. | |
4917 | Advance in the display table definition. Reset it to null if | |
4918 | end reached, and continue with characters from buffers/ | |
4919 | strings. */ | |
4920 | ++it->current.dpvec_index; | |
286bcbc9 | 4921 | |
980806b6 KH |
4922 | /* Restore face of the iterator to what they were before the |
4923 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 4924 | it->face_id = it->saved_face_id; |
2311178e | 4925 | |
5f5c8ee5 GM |
4926 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
4927 | { | |
4928 | if (it->s) | |
4929 | it->method = next_element_from_c_string; | |
4930 | else if (STRINGP (it->string)) | |
4931 | it->method = next_element_from_string; | |
4932 | else | |
4933 | it->method = next_element_from_buffer; | |
4934 | ||
4935 | it->dpvec = NULL; | |
4936 | it->current.dpvec_index = -1; | |
4937 | ||
312246d1 GM |
4938 | /* Skip over characters which were displayed via IT->dpvec. */ |
4939 | if (it->dpvec_char_len < 0) | |
4940 | reseat_at_next_visible_line_start (it, 1); | |
4941 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
4942 | { |
4943 | it->len = it->dpvec_char_len; | |
cafafe0b | 4944 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 GM |
4945 | } |
4946 | } | |
4947 | } | |
4948 | else if (it->method == next_element_from_string) | |
4949 | { | |
4950 | /* Current display element is a character from a Lisp string. */ | |
4951 | xassert (it->s == NULL && STRINGP (it->string)); | |
4952 | IT_STRING_BYTEPOS (*it) += it->len; | |
4953 | IT_STRING_CHARPOS (*it) += 1; | |
2311178e | 4954 | |
5f5c8ee5 GM |
4955 | consider_string_end: |
4956 | ||
4957 | if (it->current.overlay_string_index >= 0) | |
4958 | { | |
4959 | /* IT->string is an overlay string. Advance to the | |
4960 | next, if there is one. */ | |
2051c264 | 4961 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4962 | next_overlay_string (it); |
4963 | } | |
4964 | else | |
4965 | { | |
4966 | /* IT->string is not an overlay string. If we reached | |
4967 | its end, and there is something on IT->stack, proceed | |
4968 | with what is on the stack. This can be either another | |
4969 | string, this time an overlay string, or a buffer. */ | |
2051c264 | 4970 | if (IT_STRING_CHARPOS (*it) == SCHARS (it->string) |
5f5c8ee5 GM |
4971 | && it->sp > 0) |
4972 | { | |
4973 | pop_it (it); | |
4974 | if (!STRINGP (it->string)) | |
4975 | it->method = next_element_from_buffer; | |
b2046df8 GM |
4976 | else |
4977 | goto consider_string_end; | |
5f5c8ee5 GM |
4978 | } |
4979 | } | |
4980 | } | |
4981 | else if (it->method == next_element_from_image | |
4982 | || it->method == next_element_from_stretch) | |
4983 | { | |
4984 | /* The position etc with which we have to proceed are on | |
4985 | the stack. The position may be at the end of a string, | |
4986 | if the `display' property takes up the whole string. */ | |
4987 | pop_it (it); | |
4988 | it->image_id = 0; | |
4989 | if (STRINGP (it->string)) | |
4990 | { | |
4991 | it->method = next_element_from_string; | |
4992 | goto consider_string_end; | |
4993 | } | |
4994 | else | |
4995 | it->method = next_element_from_buffer; | |
4996 | } | |
4997 | else | |
4998 | /* There are no other methods defined, so this should be a bug. */ | |
4999 | abort (); | |
5000 | ||
5f5c8ee5 GM |
5001 | xassert (it->method != next_element_from_string |
5002 | || (STRINGP (it->string) | |
5003 | && IT_STRING_CHARPOS (*it) >= 0)); | |
5004 | } | |
5005 | ||
5006 | ||
5007 | /* Load IT's display element fields with information about the next | |
5008 | display element which comes from a display table entry or from the | |
5009 | result of translating a control character to one of the forms `^C' | |
5010 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
5011 | ||
5012 | static int | |
5013 | next_element_from_display_vector (it) | |
5014 | struct it *it; | |
5015 | { | |
5016 | /* Precondition. */ | |
5017 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
5018 | ||
5019 | /* Remember the current face id in case glyphs specify faces. | |
5020 | IT's face is restored in set_iterator_to_next. */ | |
5021 | it->saved_face_id = it->face_id; | |
2311178e | 5022 | |
5f5c8ee5 GM |
5023 | if (INTEGERP (*it->dpvec) |
5024 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
5025 | { | |
5026 | int lface_id; | |
5027 | GLYPH g; | |
5028 | ||
5029 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
5030 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 5031 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
5032 | |
5033 | /* The entry may contain a face id to use. Such a face id is | |
5034 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 5035 | zero means no face is specified. */ |
5f5c8ee5 GM |
5036 | lface_id = FAST_GLYPH_FACE (g); |
5037 | if (lface_id) | |
5038 | { | |
969065c3 | 5039 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
5040 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
5041 | if (face_id >= 0) | |
969065c3 | 5042 | it->face_id = face_id; |
5f5c8ee5 GM |
5043 | } |
5044 | } | |
5045 | else | |
5046 | /* Display table entry is invalid. Return a space. */ | |
5047 | it->c = ' ', it->len = 1; | |
5048 | ||
5049 | /* Don't change position and object of the iterator here. They are | |
5050 | still the values of the character that had this display table | |
5051 | entry or was translated, and that's what we want. */ | |
5052 | it->what = IT_CHARACTER; | |
5053 | return 1; | |
5054 | } | |
5055 | ||
5056 | ||
5057 | /* Load IT with the next display element from Lisp string IT->string. | |
5058 | IT->current.string_pos is the current position within the string. | |
5059 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
5060 | overlay string. */ | |
5061 | ||
5062 | static int | |
5063 | next_element_from_string (it) | |
5064 | struct it *it; | |
5065 | { | |
5066 | struct text_pos position; | |
5067 | ||
5068 | xassert (STRINGP (it->string)); | |
5069 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
5070 | position = it->current.string_pos; | |
5071 | ||
5072 | /* Time to check for invisible text? */ | |
5073 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
5074 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
5075 | { | |
5076 | handle_stop (it); | |
5077 | ||
5078 | /* Since a handler may have changed IT->method, we must | |
5079 | recurse here. */ | |
5080 | return get_next_display_element (it); | |
5081 | } | |
5082 | ||
5083 | if (it->current.overlay_string_index >= 0) | |
5084 | { | |
5085 | /* Get the next character from an overlay string. In overlay | |
5086 | strings, There is no field width or padding with spaces to | |
5087 | do. */ | |
2051c264 | 5088 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
5089 | { |
5090 | it->what = IT_EOB; | |
5091 | return 0; | |
5092 | } | |
5093 | else if (STRING_MULTIBYTE (it->string)) | |
5094 | { | |
2051c264 | 5095 | int remaining = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
5096 | const unsigned char *s = (SDATA (it->string) |
5097 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 5098 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
5099 | } |
5100 | else | |
5101 | { | |
2051c264 | 5102 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
5103 | it->len = 1; |
5104 | } | |
5105 | } | |
5106 | else | |
5107 | { | |
5108 | /* Get the next character from a Lisp string that is not an | |
5109 | overlay string. Such strings come from the mode line, for | |
5110 | example. We may have to pad with spaces, or truncate the | |
5111 | string. See also next_element_from_c_string. */ | |
5112 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
5113 | { | |
5114 | it->what = IT_EOB; | |
5115 | return 0; | |
5116 | } | |
5117 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
5118 | { | |
5119 | /* Pad with spaces. */ | |
5120 | it->c = ' ', it->len = 1; | |
5121 | CHARPOS (position) = BYTEPOS (position) = -1; | |
5122 | } | |
5123 | else if (STRING_MULTIBYTE (it->string)) | |
5124 | { | |
2051c264 | 5125 | int maxlen = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
5126 | const unsigned char *s = (SDATA (it->string) |
5127 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 5128 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
5129 | } |
5130 | else | |
5131 | { | |
2051c264 | 5132 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
5133 | it->len = 1; |
5134 | } | |
5135 | } | |
5136 | ||
5137 | /* Record what we have and where it came from. Note that we store a | |
5138 | buffer position in IT->position although it could arguably be a | |
5139 | string position. */ | |
5140 | it->what = IT_CHARACTER; | |
5141 | it->object = it->string; | |
5142 | it->position = position; | |
5143 | return 1; | |
5144 | } | |
5145 | ||
5146 | ||
5147 | /* Load IT with next display element from C string IT->s. | |
5148 | IT->string_nchars is the maximum number of characters to return | |
5149 | from the string. IT->end_charpos may be greater than | |
5150 | IT->string_nchars when this function is called, in which case we | |
5151 | may have to return padding spaces. Value is zero if end of string | |
5152 | reached, including padding spaces. */ | |
5153 | ||
5154 | static int | |
5155 | next_element_from_c_string (it) | |
5156 | struct it *it; | |
5157 | { | |
5158 | int success_p = 1; | |
2311178e | 5159 | |
5f5c8ee5 GM |
5160 | xassert (it->s); |
5161 | it->what = IT_CHARACTER; | |
5162 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
5163 | it->object = Qnil; | |
2311178e | 5164 | |
5f5c8ee5 GM |
5165 | /* IT's position can be greater IT->string_nchars in case a field |
5166 | width or precision has been specified when the iterator was | |
5167 | initialized. */ | |
5168 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
5169 | { | |
5170 | /* End of the game. */ | |
5171 | it->what = IT_EOB; | |
5172 | success_p = 0; | |
5173 | } | |
5174 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
5175 | { | |
5176 | /* Pad with spaces. */ | |
5177 | it->c = ' ', it->len = 1; | |
5178 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
5179 | } | |
5180 | else if (it->multibyte_p) | |
5181 | { | |
5182 | /* Implementation note: The calls to strlen apparently aren't a | |
5183 | performance problem because there is no noticeable performance | |
5184 | difference between Emacs running in unibyte or multibyte mode. */ | |
5185 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
5186 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
5187 | maxlen, &it->len); | |
5f5c8ee5 GM |
5188 | } |
5189 | else | |
5190 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
2311178e | 5191 | |
5f5c8ee5 GM |
5192 | return success_p; |
5193 | } | |
5194 | ||
5195 | ||
5196 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
5197 | The definition of the ellipsis glyphs may come from a display table | |
5198 | entry. This function Fills IT with the first glyph from the | |
5199 | ellipsis if an ellipsis is to be displayed. */ | |
5200 | ||
13f19968 | 5201 | static int |
5f5c8ee5 GM |
5202 | next_element_from_ellipsis (it) |
5203 | struct it *it; | |
5204 | { | |
13f19968 | 5205 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 5206 | { |
13f19968 GM |
5207 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
5208 | { | |
5209 | /* Use the display table definition for `...'. Invalid glyphs | |
5210 | will be handled by the method returning elements from dpvec. */ | |
5211 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
5212 | it->dpvec_char_len = it->len; | |
5213 | it->dpvec = v->contents; | |
5214 | it->dpend = v->contents + v->size; | |
5215 | it->current.dpvec_index = 0; | |
5216 | it->method = next_element_from_display_vector; | |
5217 | } | |
5218 | else | |
5219 | { | |
5220 | /* Use default `...' which is stored in default_invis_vector. */ | |
5221 | it->dpvec_char_len = it->len; | |
5222 | it->dpvec = default_invis_vector; | |
5223 | it->dpend = default_invis_vector + 3; | |
5224 | it->current.dpvec_index = 0; | |
5225 | it->method = next_element_from_display_vector; | |
5226 | } | |
5f5c8ee5 | 5227 | } |
13f19968 | 5228 | else |
54918e2b | 5229 | { |
4aad61f8 GM |
5230 | /* The face at the current position may be different from the |
5231 | face we find after the invisible text. Remember what it | |
5232 | was in IT->saved_face_id, and signal that it's there by | |
5233 | setting face_before_selective_p. */ | |
5234 | it->saved_face_id = it->face_id; | |
54918e2b GM |
5235 | it->method = next_element_from_buffer; |
5236 | reseat_at_next_visible_line_start (it, 1); | |
4aad61f8 | 5237 | it->face_before_selective_p = 1; |
54918e2b | 5238 | } |
2311178e | 5239 | |
13f19968 | 5240 | return get_next_display_element (it); |
5f5c8ee5 GM |
5241 | } |
5242 | ||
5243 | ||
5244 | /* Deliver an image display element. The iterator IT is already | |
5245 | filled with image information (done in handle_display_prop). Value | |
5246 | is always 1. */ | |
2311178e | 5247 | |
5f5c8ee5 GM |
5248 | |
5249 | static int | |
5250 | next_element_from_image (it) | |
5251 | struct it *it; | |
5252 | { | |
5253 | it->what = IT_IMAGE; | |
5254 | return 1; | |
5255 | } | |
5256 | ||
5257 | ||
5258 | /* Fill iterator IT with next display element from a stretch glyph | |
5259 | property. IT->object is the value of the text property. Value is | |
5260 | always 1. */ | |
5261 | ||
5262 | static int | |
5263 | next_element_from_stretch (it) | |
5264 | struct it *it; | |
5265 | { | |
5266 | it->what = IT_STRETCH; | |
5267 | return 1; | |
5268 | } | |
5269 | ||
5270 | ||
5271 | /* Load IT with the next display element from current_buffer. Value | |
5272 | is zero if end of buffer reached. IT->stop_charpos is the next | |
5273 | position at which to stop and check for text properties or buffer | |
5274 | end. */ | |
5275 | ||
5276 | static int | |
5277 | next_element_from_buffer (it) | |
5278 | struct it *it; | |
5279 | { | |
5280 | int success_p = 1; | |
5281 | ||
5282 | /* Check this assumption, otherwise, we would never enter the | |
5283 | if-statement, below. */ | |
5284 | xassert (IT_CHARPOS (*it) >= BEGV | |
5285 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
5286 | ||
5287 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
5288 | { | |
5289 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
5290 | { | |
5291 | int overlay_strings_follow_p; | |
2311178e | 5292 | |
5f5c8ee5 GM |
5293 | /* End of the game, except when overlay strings follow that |
5294 | haven't been returned yet. */ | |
5295 | if (it->overlay_strings_at_end_processed_p) | |
5296 | overlay_strings_follow_p = 0; | |
5297 | else | |
5298 | { | |
5299 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 5300 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
5301 | } |
5302 | ||
5303 | if (overlay_strings_follow_p) | |
5304 | success_p = get_next_display_element (it); | |
5305 | else | |
5306 | { | |
5307 | it->what = IT_EOB; | |
5308 | it->position = it->current.pos; | |
5309 | success_p = 0; | |
5310 | } | |
5311 | } | |
5312 | else | |
5313 | { | |
5314 | handle_stop (it); | |
5315 | return get_next_display_element (it); | |
5316 | } | |
5317 | } | |
5318 | else | |
5319 | { | |
5320 | /* No face changes, overlays etc. in sight, so just return a | |
5321 | character from current_buffer. */ | |
5322 | unsigned char *p; | |
5323 | ||
5324 | /* Maybe run the redisplay end trigger hook. Performance note: | |
5325 | This doesn't seem to cost measurable time. */ | |
5326 | if (it->redisplay_end_trigger_charpos | |
5327 | && it->glyph_row | |
5328 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
5329 | run_redisplay_end_trigger_hook (it); | |
5330 | ||
5331 | /* Get the next character, maybe multibyte. */ | |
5332 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 5333 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
5334 | { |
5335 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
5336 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 5337 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
5338 | } |
5339 | else | |
5340 | it->c = *p, it->len = 1; | |
5341 | ||
5342 | /* Record what we have and where it came from. */ | |
5343 | it->what = IT_CHARACTER;; | |
5344 | it->object = it->w->buffer; | |
5345 | it->position = it->current.pos; | |
5346 | ||
5347 | /* Normally we return the character found above, except when we | |
5348 | really want to return an ellipsis for selective display. */ | |
5349 | if (it->selective) | |
5350 | { | |
5351 | if (it->c == '\n') | |
5352 | { | |
5353 | /* A value of selective > 0 means hide lines indented more | |
5354 | than that number of columns. */ | |
5355 | if (it->selective > 0 | |
5356 | && IT_CHARPOS (*it) + 1 < ZV | |
5357 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
5358 | IT_BYTEPOS (*it) + 1, | |
a67e162b | 5359 | (double) it->selective)) /* iftc */ |
312246d1 | 5360 | { |
13f19968 | 5361 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
5362 | it->dpvec_char_len = -1; |
5363 | } | |
5f5c8ee5 GM |
5364 | } |
5365 | else if (it->c == '\r' && it->selective == -1) | |
5366 | { | |
5367 | /* A value of selective == -1 means that everything from the | |
5368 | CR to the end of the line is invisible, with maybe an | |
5369 | ellipsis displayed for it. */ | |
13f19968 | 5370 | success_p = next_element_from_ellipsis (it); |
312246d1 | 5371 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
5372 | } |
5373 | } | |
5374 | } | |
5375 | ||
5376 | /* Value is zero if end of buffer reached. */ | |
c880678e | 5377 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
5378 | return success_p; |
5379 | } | |
5380 | ||
2311178e | 5381 | |
5f5c8ee5 GM |
5382 | /* Run the redisplay end trigger hook for IT. */ |
5383 | ||
5384 | static void | |
5385 | run_redisplay_end_trigger_hook (it) | |
5386 | struct it *it; | |
5387 | { | |
5388 | Lisp_Object args[3]; | |
5389 | ||
5390 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
5391 | displaying something, or otherwise we should not run the hook. */ | |
5392 | xassert (it->glyph_row); | |
5393 | ||
5394 | /* Set up hook arguments. */ | |
5395 | args[0] = Qredisplay_end_trigger_functions; | |
5396 | args[1] = it->window; | |
5397 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
5398 | it->redisplay_end_trigger_charpos = 0; | |
5399 | ||
5400 | /* Since we are *trying* to run these functions, don't try to run | |
5401 | them again, even if they get an error. */ | |
5402 | it->w->redisplay_end_trigger = Qnil; | |
5403 | Frun_hook_with_args (3, args); | |
2311178e | 5404 | |
5f5c8ee5 GM |
5405 | /* Notice if it changed the face of the character we are on. */ |
5406 | handle_face_prop (it); | |
5407 | } | |
5408 | ||
5409 | ||
260a86a0 KH |
5410 | /* Deliver a composition display element. The iterator IT is already |
5411 | filled with composition information (done in | |
5412 | handle_composition_prop). Value is always 1. */ | |
5413 | ||
5414 | static int | |
5415 | next_element_from_composition (it) | |
5416 | struct it *it; | |
5417 | { | |
5418 | it->what = IT_COMPOSITION; | |
5419 | it->position = (STRINGP (it->string) | |
5420 | ? it->current.string_pos | |
5421 | : it->current.pos); | |
5422 | return 1; | |
5423 | } | |
5424 | ||
5425 | ||
5f5c8ee5 GM |
5426 | \f |
5427 | /*********************************************************************** | |
5428 | Moving an iterator without producing glyphs | |
5429 | ***********************************************************************/ | |
5430 | ||
5431 | /* Move iterator IT to a specified buffer or X position within one | |
5432 | line on the display without producing glyphs. | |
5433 | ||
c53a1624 RS |
5434 | OP should be a bit mask including some or all of these bits: |
5435 | MOVE_TO_X: Stop on reaching x-position TO_X. | |
5436 | MOVE_TO_POS: Stop on reaching buffer or string position TO_CHARPOS. | |
5437 | Regardless of OP's value, stop in reaching the end of the display line. | |
5f5c8ee5 | 5438 | |
c53a1624 RS |
5439 | TO_X is normally a value 0 <= TO_X <= IT->last_visible_x. |
5440 | This means, in particular, that TO_X includes window's horizontal | |
5441 | scroll amount. | |
5f5c8ee5 | 5442 | |
c53a1624 RS |
5443 | The return value has several possible values that |
5444 | say what condition caused the scan to stop: | |
5f5c8ee5 GM |
5445 | |
5446 | MOVE_POS_MATCH_OR_ZV | |
5447 | - when TO_POS or ZV was reached. | |
2311178e | 5448 | |
5f5c8ee5 GM |
5449 | MOVE_X_REACHED |
5450 | -when TO_X was reached before TO_POS or ZV were reached. | |
2311178e | 5451 | |
5f5c8ee5 GM |
5452 | MOVE_LINE_CONTINUED |
5453 | - when we reached the end of the display area and the line must | |
5454 | be continued. | |
2311178e | 5455 | |
5f5c8ee5 GM |
5456 | MOVE_LINE_TRUNCATED |
5457 | - when we reached the end of the display area and the line is | |
5458 | truncated. | |
5459 | ||
5460 | MOVE_NEWLINE_OR_CR | |
5461 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
5462 | display is on. */ | |
5463 | ||
701552dd | 5464 | static enum move_it_result |
5f5c8ee5 GM |
5465 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
5466 | struct it *it; | |
5467 | int to_charpos, to_x, op; | |
5468 | { | |
5469 | enum move_it_result result = MOVE_UNDEFINED; | |
5470 | struct glyph_row *saved_glyph_row; | |
5471 | ||
5472 | /* Don't produce glyphs in produce_glyphs. */ | |
5473 | saved_glyph_row = it->glyph_row; | |
5474 | it->glyph_row = NULL; | |
5475 | ||
5f5c8ee5 GM |
5476 | while (1) |
5477 | { | |
ae26e27d | 5478 | int x, i, ascent = 0, descent = 0; |
2311178e | 5479 | |
5f5c8ee5 GM |
5480 | /* Stop when ZV or TO_CHARPOS reached. */ |
5481 | if (!get_next_display_element (it) | |
5482 | || ((op & MOVE_TO_POS) != 0 | |
5483 | && BUFFERP (it->object) | |
5484 | && IT_CHARPOS (*it) >= to_charpos)) | |
5485 | { | |
5486 | result = MOVE_POS_MATCH_OR_ZV; | |
5487 | break; | |
5488 | } | |
2311178e | 5489 | |
5f5c8ee5 GM |
5490 | /* The call to produce_glyphs will get the metrics of the |
5491 | display element IT is loaded with. We record in x the | |
5492 | x-position before this display element in case it does not | |
5493 | fit on the line. */ | |
5494 | x = it->current_x; | |
2311178e | 5495 | |
47589c8c GM |
5496 | /* Remember the line height so far in case the next element doesn't |
5497 | fit on the line. */ | |
5498 | if (!it->truncate_lines_p) | |
5499 | { | |
5500 | ascent = it->max_ascent; | |
5501 | descent = it->max_descent; | |
5502 | } | |
2311178e | 5503 | |
5f5c8ee5 GM |
5504 | PRODUCE_GLYPHS (it); |
5505 | ||
5506 | if (it->area != TEXT_AREA) | |
5507 | { | |
cafafe0b | 5508 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5509 | continue; |
5510 | } | |
5511 | ||
5512 | /* The number of glyphs we get back in IT->nglyphs will normally | |
5513 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
5514 | character on a terminal frame, or (iii) a line end. For the | |
5515 | second case, IT->nglyphs - 1 padding glyphs will be present | |
5516 | (on X frames, there is only one glyph produced for a | |
5517 | composite character. | |
5518 | ||
5519 | The behavior implemented below means, for continuation lines, | |
5520 | that as many spaces of a TAB as fit on the current line are | |
5521 | displayed there. For terminal frames, as many glyphs of a | |
5522 | multi-glyph character are displayed in the current line, too. | |
5523 | This is what the old redisplay code did, and we keep it that | |
5524 | way. Under X, the whole shape of a complex character must | |
5525 | fit on the line or it will be completely displayed in the | |
5526 | next line. | |
5527 | ||
5528 | Note that both for tabs and padding glyphs, all glyphs have | |
5529 | the same width. */ | |
5530 | if (it->nglyphs) | |
5531 | { | |
5532 | /* More than one glyph or glyph doesn't fit on line. All | |
5533 | glyphs have the same width. */ | |
5534 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
5535 | int new_x; | |
2311178e | 5536 | |
5f5c8ee5 GM |
5537 | for (i = 0; i < it->nglyphs; ++i, x = new_x) |
5538 | { | |
5539 | new_x = x + single_glyph_width; | |
5540 | ||
5541 | /* We want to leave anything reaching TO_X to the caller. */ | |
5542 | if ((op & MOVE_TO_X) && new_x > to_x) | |
5543 | { | |
5544 | it->current_x = x; | |
5545 | result = MOVE_X_REACHED; | |
5546 | break; | |
5547 | } | |
5548 | else if (/* Lines are continued. */ | |
5549 | !it->truncate_lines_p | |
5550 | && (/* And glyph doesn't fit on the line. */ | |
5551 | new_x > it->last_visible_x | |
5552 | /* Or it fits exactly and we're on a window | |
5553 | system frame. */ | |
5554 | || (new_x == it->last_visible_x | |
5555 | && FRAME_WINDOW_P (it->f)))) | |
5556 | { | |
5557 | if (/* IT->hpos == 0 means the very first glyph | |
5558 | doesn't fit on the line, e.g. a wide image. */ | |
5559 | it->hpos == 0 | |
5560 | || (new_x == it->last_visible_x | |
5561 | && FRAME_WINDOW_P (it->f))) | |
5562 | { | |
5563 | ++it->hpos; | |
5564 | it->current_x = new_x; | |
5565 | if (i == it->nglyphs - 1) | |
cafafe0b | 5566 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5567 | } |
5568 | else | |
47589c8c GM |
5569 | { |
5570 | it->current_x = x; | |
5571 | it->max_ascent = ascent; | |
5572 | it->max_descent = descent; | |
5573 | } | |
2311178e | 5574 | |
47589c8c GM |
5575 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", |
5576 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
5577 | result = MOVE_LINE_CONTINUED; |
5578 | break; | |
5579 | } | |
5580 | else if (new_x > it->first_visible_x) | |
5581 | { | |
5582 | /* Glyph is visible. Increment number of glyphs that | |
5583 | would be displayed. */ | |
5584 | ++it->hpos; | |
5585 | } | |
5586 | else | |
5587 | { | |
2311178e | 5588 | /* Glyph is completely off the left margin of the display |
5f5c8ee5 GM |
5589 | area. Nothing to do. */ |
5590 | } | |
5591 | } | |
5592 | ||
5593 | if (result != MOVE_UNDEFINED) | |
5594 | break; | |
5595 | } | |
5596 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
5597 | { | |
5598 | /* Stop when TO_X specified and reached. This check is | |
5599 | necessary here because of lines consisting of a line end, | |
5600 | only. The line end will not produce any glyphs and we | |
5601 | would never get MOVE_X_REACHED. */ | |
5602 | xassert (it->nglyphs == 0); | |
5603 | result = MOVE_X_REACHED; | |
5604 | break; | |
5605 | } | |
2311178e | 5606 | |
5f5c8ee5 GM |
5607 | /* Is this a line end? If yes, we're done. */ |
5608 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5609 | { | |
5610 | result = MOVE_NEWLINE_OR_CR; | |
5611 | break; | |
5612 | } | |
2311178e | 5613 | |
5f5c8ee5 GM |
5614 | /* The current display element has been consumed. Advance |
5615 | to the next. */ | |
cafafe0b | 5616 | set_iterator_to_next (it, 1); |
2311178e | 5617 | |
5f5c8ee5 GM |
5618 | /* Stop if lines are truncated and IT's current x-position is |
5619 | past the right edge of the window now. */ | |
5620 | if (it->truncate_lines_p | |
5621 | && it->current_x >= it->last_visible_x) | |
5622 | { | |
5623 | result = MOVE_LINE_TRUNCATED; | |
5624 | break; | |
5625 | } | |
5626 | } | |
5627 | ||
5628 | /* Restore the iterator settings altered at the beginning of this | |
5629 | function. */ | |
5630 | it->glyph_row = saved_glyph_row; | |
5631 | return result; | |
5632 | } | |
5633 | ||
5634 | ||
9b2bba76 RS |
5635 | /* Move IT forward until it satisfies one or more of the criteria in |
5636 | TO_CHARPOS, TO_X, TO_Y, and TO_VPOS. | |
5637 | ||
5638 | OP is a bit-mask that specifies where to stop, and in particular, | |
5639 | which of those four position arguments makes a difference. See the | |
5640 | description of enum move_operation_enum. | |
2311178e | 5641 | |
5f5c8ee5 GM |
5642 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a |
5643 | screen line, this function will set IT to the next position > | |
5644 | TO_CHARPOS. */ | |
5645 | ||
5646 | void | |
5647 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
5648 | struct it *it; | |
5649 | int to_charpos, to_x, to_y, to_vpos; | |
5650 | int op; | |
5651 | { | |
5652 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
5653 | int line_height; | |
47589c8c | 5654 | int reached = 0; |
5f5c8ee5 | 5655 | |
47589c8c | 5656 | for (;;) |
5f5c8ee5 GM |
5657 | { |
5658 | if (op & MOVE_TO_VPOS) | |
5659 | { | |
5660 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
5661 | start of the line TO_VPOS. */ | |
5662 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
5663 | { | |
5664 | if (it->vpos == to_vpos) | |
47589c8c GM |
5665 | { |
5666 | reached = 1; | |
5667 | break; | |
5668 | } | |
5669 | else | |
5670 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
5671 | } |
5672 | else | |
5673 | { | |
5674 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
5675 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
5676 | if (it->vpos == to_vpos) |
5677 | { | |
5678 | reached = 2; | |
5679 | break; | |
5680 | } | |
2311178e | 5681 | |
5f5c8ee5 GM |
5682 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
5683 | ||
5684 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
5685 | { |
5686 | reached = 3; | |
5687 | break; | |
5688 | } | |
5f5c8ee5 GM |
5689 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
5690 | { | |
5691 | /* We have reached TO_X but not in the line we want. */ | |
5692 | skip = move_it_in_display_line_to (it, to_charpos, | |
5693 | -1, MOVE_TO_POS); | |
5694 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5695 | { |
5696 | reached = 4; | |
5697 | break; | |
5698 | } | |
5f5c8ee5 GM |
5699 | } |
5700 | } | |
5701 | } | |
5702 | else if (op & MOVE_TO_Y) | |
5703 | { | |
5704 | struct it it_backup; | |
2311178e | 5705 | |
5f5c8ee5 GM |
5706 | /* TO_Y specified means stop at TO_X in the line containing |
5707 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
5708 | problem is that we can't really tell whether the line | |
5709 | contains TO_Y before we have completely scanned it, and | |
5710 | this may skip past TO_X. What we do is to first scan to | |
5711 | TO_X. | |
5712 | ||
5713 | If TO_X is not specified, use a TO_X of zero. The reason | |
5714 | is to make the outcome of this function more predictable. | |
5715 | If we didn't use TO_X == 0, we would stop at the end of | |
5716 | the line which is probably not what a caller would expect | |
5717 | to happen. */ | |
5718 | skip = move_it_in_display_line_to (it, to_charpos, | |
5719 | ((op & MOVE_TO_X) | |
5720 | ? to_x : 0), | |
5721 | (MOVE_TO_X | |
5722 | | (op & MOVE_TO_POS))); | |
5723 | ||
5724 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
5725 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5726 | { |
5727 | reached = 5; | |
5728 | break; | |
5729 | } | |
2311178e | 5730 | |
5f5c8ee5 GM |
5731 | /* If TO_X was reached, we would like to know whether TO_Y |
5732 | is in the line. This can only be said if we know the | |
5733 | total line height which requires us to scan the rest of | |
5734 | the line. */ | |
5f5c8ee5 GM |
5735 | if (skip == MOVE_X_REACHED) |
5736 | { | |
5737 | it_backup = *it; | |
47589c8c | 5738 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5739 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
5740 | op & MOVE_TO_POS); | |
47589c8c | 5741 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5742 | } |
5743 | ||
5744 | /* Now, decide whether TO_Y is in this line. */ | |
5745 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 5746 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
2311178e | 5747 | |
5f5c8ee5 GM |
5748 | if (to_y >= it->current_y |
5749 | && to_y < it->current_y + line_height) | |
5750 | { | |
5751 | if (skip == MOVE_X_REACHED) | |
5752 | /* If TO_Y is in this line and TO_X was reached above, | |
5753 | we scanned too far. We have to restore IT's settings | |
5754 | to the ones before skipping. */ | |
5755 | *it = it_backup; | |
47589c8c | 5756 | reached = 6; |
5f5c8ee5 GM |
5757 | } |
5758 | else if (skip == MOVE_X_REACHED) | |
5759 | { | |
5760 | skip = skip2; | |
5761 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 5762 | reached = 7; |
5f5c8ee5 GM |
5763 | } |
5764 | ||
47589c8c | 5765 | if (reached) |
5f5c8ee5 GM |
5766 | break; |
5767 | } | |
5768 | else | |
5769 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
5770 | ||
5771 | switch (skip) | |
5772 | { | |
5773 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
5774 | reached = 8; |
5775 | goto out; | |
5f5c8ee5 GM |
5776 | |
5777 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 5778 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5779 | it->continuation_lines_width = 0; |
5780 | break; | |
5781 | ||
5782 | case MOVE_LINE_TRUNCATED: | |
5783 | it->continuation_lines_width = 0; | |
312246d1 | 5784 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5785 | if ((op & MOVE_TO_POS) != 0 |
5786 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
5787 | { |
5788 | reached = 9; | |
5789 | goto out; | |
5790 | } | |
5f5c8ee5 GM |
5791 | break; |
5792 | ||
5793 | case MOVE_LINE_CONTINUED: | |
5794 | it->continuation_lines_width += it->current_x; | |
5795 | break; | |
5796 | ||
5797 | default: | |
5798 | abort (); | |
5799 | } | |
5800 | ||
5801 | /* Reset/increment for the next run. */ | |
5802 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
5803 | it->current_x = it->hpos = 0; | |
5804 | it->current_y += it->max_ascent + it->max_descent; | |
5805 | ++it->vpos; | |
5806 | last_height = it->max_ascent + it->max_descent; | |
5807 | last_max_ascent = it->max_ascent; | |
5808 | it->max_ascent = it->max_descent = 0; | |
5809 | } | |
2311178e | 5810 | |
47589c8c GM |
5811 | out: |
5812 | ||
5813 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
5814 | } |
5815 | ||
5816 | ||
5817 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
5818 | ||
5819 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
5820 | means move IT backward to the preceding line start or BEGV. This | |
5821 | function may move over more than DY pixels if IT->current_y - DY | |
5822 | ends up in the middle of a line; in this case IT->current_y will be | |
5823 | set to the top of the line moved to. */ | |
5824 | ||
5825 | void | |
5826 | move_it_vertically_backward (it, dy) | |
5827 | struct it *it; | |
5828 | int dy; | |
5829 | { | |
79ddf6f7 GM |
5830 | int nlines, h; |
5831 | struct it it2, it3; | |
5f5c8ee5 | 5832 | int start_pos = IT_CHARPOS (*it); |
2311178e | 5833 | |
5f5c8ee5 GM |
5834 | xassert (dy >= 0); |
5835 | ||
5836 | /* Estimate how many newlines we must move back. */ | |
da8b7f4f | 5837 | nlines = max (1, dy / FRAME_LINE_HEIGHT (it->f)); |
5f5c8ee5 GM |
5838 | |
5839 | /* Set the iterator's position that many lines back. */ | |
5840 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
5841 | back_to_previous_visible_line_start (it); | |
5842 | ||
5843 | /* Reseat the iterator here. When moving backward, we don't want | |
5844 | reseat to skip forward over invisible text, set up the iterator | |
5845 | to deliver from overlay strings at the new position etc. So, | |
5846 | use reseat_1 here. */ | |
5847 | reseat_1 (it, it->current.pos, 1); | |
5848 | ||
5849 | /* We are now surely at a line start. */ | |
5850 | it->current_x = it->hpos = 0; | |
0e47bbf7 | 5851 | it->continuation_lines_width = 0; |
5f5c8ee5 GM |
5852 | |
5853 | /* Move forward and see what y-distance we moved. First move to the | |
5854 | start of the next line so that we get its height. We need this | |
5855 | height to be able to tell whether we reached the specified | |
5856 | y-distance. */ | |
5857 | it2 = *it; | |
5858 | it2.max_ascent = it2.max_descent = 0; | |
5859 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
5860 | MOVE_TO_POS | MOVE_TO_VPOS); | |
5861 | xassert (IT_CHARPOS (*it) >= BEGV); | |
79ddf6f7 | 5862 | it3 = it2; |
2311178e | 5863 | |
5f5c8ee5 GM |
5864 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
5865 | xassert (IT_CHARPOS (*it) >= BEGV); | |
ccbb9ed2 RS |
5866 | /* H is the actual vertical distance from the position in *IT |
5867 | and the starting position. */ | |
5f5c8ee5 | 5868 | h = it2.current_y - it->current_y; |
ccbb9ed2 | 5869 | /* NLINES is the distance in number of lines. */ |
5f5c8ee5 GM |
5870 | nlines = it2.vpos - it->vpos; |
5871 | ||
ccbb9ed2 RS |
5872 | /* Correct IT's y and vpos position |
5873 | so that they are relative to the starting point. */ | |
5f5c8ee5 GM |
5874 | it->vpos -= nlines; |
5875 | it->current_y -= h; | |
2311178e | 5876 | |
5f5c8ee5 GM |
5877 | if (dy == 0) |
5878 | { | |
5879 | /* DY == 0 means move to the start of the screen line. The | |
5880 | value of nlines is > 0 if continuation lines were involved. */ | |
5881 | if (nlines > 0) | |
5882 | move_it_by_lines (it, nlines, 1); | |
5883 | xassert (IT_CHARPOS (*it) <= start_pos); | |
5884 | } | |
ccbb9ed2 | 5885 | else |
5f5c8ee5 | 5886 | { |
ccbb9ed2 RS |
5887 | /* The y-position we try to reach, relative to *IT. |
5888 | Note that H has been subtracted in front of the if-statement. */ | |
5f5c8ee5 | 5889 | int target_y = it->current_y + h - dy; |
79ddf6f7 GM |
5890 | int y0 = it3.current_y; |
5891 | int y1 = line_bottom_y (&it3); | |
5892 | int line_height = y1 - y0; | |
f7ccfc8c | 5893 | |
5f5c8ee5 GM |
5894 | /* If we did not reach target_y, try to move further backward if |
5895 | we can. If we moved too far backward, try to move forward. */ | |
5896 | if (target_y < it->current_y | |
79ddf6f7 GM |
5897 | /* This is heuristic. In a window that's 3 lines high, with |
5898 | a line height of 13 pixels each, recentering with point | |
5899 | on the bottom line will try to move -39/2 = 19 pixels | |
5900 | backward. Try to avoid moving into the first line. */ | |
798dbe1f | 5901 | && it->current_y - target_y > line_height / 3 * 2 |
5f5c8ee5 GM |
5902 | && IT_CHARPOS (*it) > BEGV) |
5903 | { | |
f7ccfc8c GM |
5904 | TRACE_MOVE ((stderr, " not far enough -> move_vert %d\n", |
5905 | target_y - it->current_y)); | |
5f5c8ee5 GM |
5906 | move_it_vertically (it, target_y - it->current_y); |
5907 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5908 | } | |
5909 | else if (target_y >= it->current_y + line_height | |
5910 | && IT_CHARPOS (*it) < ZV) | |
5911 | { | |
55591976 | 5912 | /* Should move forward by at least one line, maybe more. |
2311178e | 5913 | |
55591976 GM |
5914 | Note: Calling move_it_by_lines can be expensive on |
5915 | terminal frames, where compute_motion is used (via | |
5916 | vmotion) to do the job, when there are very long lines | |
5917 | and truncate-lines is nil. That's the reason for | |
5918 | treating terminal frames specially here. */ | |
2311178e | 5919 | |
55591976 GM |
5920 | if (!FRAME_WINDOW_P (it->f)) |
5921 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
5922 | else | |
f7ccfc8c | 5923 | { |
55591976 GM |
5924 | do |
5925 | { | |
5926 | move_it_by_lines (it, 1, 1); | |
5927 | } | |
5928 | while (target_y >= line_bottom_y (it) && IT_CHARPOS (*it) < ZV); | |
f7ccfc8c | 5929 | } |
f7ccfc8c | 5930 | |
5f5c8ee5 GM |
5931 | xassert (IT_CHARPOS (*it) >= BEGV); |
5932 | } | |
5933 | } | |
5934 | } | |
5935 | ||
5936 | ||
5937 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
5938 | move backwards. DY = 0 means move to start of screen line. At the | |
5939 | end, IT will be on the start of a screen line. */ | |
5940 | ||
2311178e | 5941 | void |
5f5c8ee5 GM |
5942 | move_it_vertically (it, dy) |
5943 | struct it *it; | |
5944 | int dy; | |
5945 | { | |
5946 | if (dy <= 0) | |
5947 | move_it_vertically_backward (it, -dy); | |
5948 | else if (dy > 0) | |
5949 | { | |
47589c8c | 5950 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
5951 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
5952 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 5953 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5954 | |
5955 | /* If buffer ends in ZV without a newline, move to the start of | |
5956 | the line to satisfy the post-condition. */ | |
5957 | if (IT_CHARPOS (*it) == ZV | |
5958 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
5959 | move_it_by_lines (it, 0, 0); | |
5960 | } | |
5961 | } | |
5962 | ||
5963 | ||
47fc2c10 GM |
5964 | /* Move iterator IT past the end of the text line it is in. */ |
5965 | ||
5966 | void | |
5967 | move_it_past_eol (it) | |
5968 | struct it *it; | |
5969 | { | |
5970 | enum move_it_result rc; | |
2311178e | 5971 | |
47fc2c10 GM |
5972 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); |
5973 | if (rc == MOVE_NEWLINE_OR_CR) | |
5974 | set_iterator_to_next (it, 0); | |
5975 | } | |
5976 | ||
5977 | ||
2c79b732 GM |
5978 | #if 0 /* Currently not used. */ |
5979 | ||
5f5c8ee5 GM |
5980 | /* Return non-zero if some text between buffer positions START_CHARPOS |
5981 | and END_CHARPOS is invisible. IT->window is the window for text | |
5982 | property lookup. */ | |
5983 | ||
5984 | static int | |
5985 | invisible_text_between_p (it, start_charpos, end_charpos) | |
5986 | struct it *it; | |
5987 | int start_charpos, end_charpos; | |
5988 | { | |
5f5c8ee5 GM |
5989 | Lisp_Object prop, limit; |
5990 | int invisible_found_p; | |
2311178e | 5991 | |
5f5c8ee5 GM |
5992 | xassert (it != NULL && start_charpos <= end_charpos); |
5993 | ||
5994 | /* Is text at START invisible? */ | |
5995 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
5996 | it->window); | |
5997 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
5998 | invisible_found_p = 1; | |
5999 | else | |
6000 | { | |
016b5642 MB |
6001 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
6002 | Qinvisible, Qnil, | |
6003 | make_number (end_charpos)); | |
5f5c8ee5 GM |
6004 | invisible_found_p = XFASTINT (limit) < end_charpos; |
6005 | } | |
6006 | ||
6007 | return invisible_found_p; | |
5f5c8ee5 GM |
6008 | } |
6009 | ||
2c79b732 GM |
6010 | #endif /* 0 */ |
6011 | ||
5f5c8ee5 GM |
6012 | |
6013 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
6014 | negative means move up. DVPOS == 0 means move to the start of the | |
6015 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
6016 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
6017 | ||
6018 | Further optimization ideas: If we would know that IT->f doesn't use | |
6019 | a face with proportional font, we could be faster for | |
6020 | truncate-lines nil. */ | |
6021 | ||
6022 | void | |
6023 | move_it_by_lines (it, dvpos, need_y_p) | |
6024 | struct it *it; | |
6025 | int dvpos, need_y_p; | |
6026 | { | |
6027 | struct position pos; | |
2311178e | 6028 | |
5f5c8ee5 GM |
6029 | if (!FRAME_WINDOW_P (it->f)) |
6030 | { | |
6031 | struct text_pos textpos; | |
2311178e | 6032 | |
5f5c8ee5 GM |
6033 | /* We can use vmotion on frames without proportional fonts. */ |
6034 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
6035 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
6036 | reseat (it, textpos, 1); | |
6037 | it->vpos += pos.vpos; | |
6038 | it->current_y += pos.vpos; | |
6039 | } | |
6040 | else if (dvpos == 0) | |
6041 | { | |
6042 | /* DVPOS == 0 means move to the start of the screen line. */ | |
6043 | move_it_vertically_backward (it, 0); | |
6044 | xassert (it->current_x == 0 && it->hpos == 0); | |
6045 | } | |
6046 | else if (dvpos > 0) | |
2c79b732 | 6047 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); |
5f5c8ee5 GM |
6048 | else |
6049 | { | |
6050 | struct it it2; | |
6051 | int start_charpos, i; | |
2311178e | 6052 | |
e8660d73 GM |
6053 | /* Start at the beginning of the screen line containing IT's |
6054 | position. */ | |
6055 | move_it_vertically_backward (it, 0); | |
2311178e | 6056 | |
5f5c8ee5 GM |
6057 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
6058 | start_charpos = IT_CHARPOS (*it); | |
6059 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
6060 | back_to_previous_visible_line_start (it); | |
6061 | reseat (it, it->current.pos, 1); | |
6062 | it->current_x = it->hpos = 0; | |
6063 | ||
6064 | /* Above call may have moved too far if continuation lines | |
6065 | are involved. Scan forward and see if it did. */ | |
6066 | it2 = *it; | |
6067 | it2.vpos = it2.current_y = 0; | |
6068 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
6069 | it->vpos -= it2.vpos; | |
6070 | it->current_y -= it2.current_y; | |
6071 | it->current_x = it->hpos = 0; | |
6072 | ||
6073 | /* If we moved too far, move IT some lines forward. */ | |
6074 | if (it2.vpos > -dvpos) | |
6075 | { | |
6076 | int delta = it2.vpos + dvpos; | |
6077 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
6078 | } | |
6079 | } | |
6080 | } | |
6081 | ||
3824b1a6 AS |
6082 | /* Return 1 if IT points into the middle of a display vector. */ |
6083 | ||
6084 | int | |
6085 | in_display_vector_p (it) | |
6086 | struct it *it; | |
6087 | { | |
6088 | return (it->method == next_element_from_display_vector | |
6089 | && it->current.dpvec_index > 0 | |
6090 | && it->dpvec + it->current.dpvec_index != it->dpend); | |
6091 | } | |
5f5c8ee5 GM |
6092 | |
6093 | \f | |
6094 | /*********************************************************************** | |
6095 | Messages | |
6096 | ***********************************************************************/ | |
6097 | ||
6098 | ||
937248bc GM |
6099 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
6100 | to *Messages*. */ | |
6101 | ||
6102 | void | |
6103 | add_to_log (format, arg1, arg2) | |
6104 | char *format; | |
6105 | Lisp_Object arg1, arg2; | |
6106 | { | |
6107 | Lisp_Object args[3]; | |
6108 | Lisp_Object msg, fmt; | |
6109 | char *buffer; | |
6110 | int len; | |
6111 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
6112 | ||
ae794295 GM |
6113 | /* Do nothing if called asynchronously. Inserting text into |
6114 | a buffer may call after-change-functions and alike and | |
6115 | that would means running Lisp asynchronously. */ | |
6116 | if (handling_signal) | |
6117 | return; | |
6118 | ||
937248bc GM |
6119 | fmt = msg = Qnil; |
6120 | GCPRO4 (fmt, msg, arg1, arg2); | |
2311178e | 6121 | |
937248bc GM |
6122 | args[0] = fmt = build_string (format); |
6123 | args[1] = arg1; | |
6124 | args[2] = arg2; | |
6fc556fd | 6125 | msg = Fformat (3, args); |
937248bc | 6126 | |
2051c264 | 6127 | len = SBYTES (msg) + 1; |
937248bc | 6128 | buffer = (char *) alloca (len); |
2051c264 | 6129 | bcopy (SDATA (msg), buffer, len); |
2311178e | 6130 | |
796184bc | 6131 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
6132 | UNGCPRO; |
6133 | } | |
6134 | ||
6135 | ||
5f5c8ee5 GM |
6136 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
6137 | ||
6138 | void | |
6139 | message_log_maybe_newline () | |
6140 | { | |
6141 | if (message_log_need_newline) | |
6142 | message_dolog ("", 0, 1, 0); | |
6143 | } | |
6144 | ||
6145 | ||
1e313f28 | 6146 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
6147 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
6148 | nonzero, means interpret the contents of M as multibyte. This | |
6149 | function calls low-level routines in order to bypass text property | |
6150 | hooks, etc. which might not be safe to run. */ | |
6151 | ||
6152 | void | |
1e313f28 | 6153 | message_dolog (m, nbytes, nlflag, multibyte) |
50f80c2f | 6154 | const char *m; |
1e313f28 | 6155 | int nbytes, nlflag, multibyte; |
5f5c8ee5 | 6156 | { |
a67e162b RS |
6157 | if (!NILP (Vmemory_full)) |
6158 | return; | |
6159 | ||
5f5c8ee5 GM |
6160 | if (!NILP (Vmessage_log_max)) |
6161 | { | |
6162 | struct buffer *oldbuf; | |
6163 | Lisp_Object oldpoint, oldbegv, oldzv; | |
6164 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
6165 | int point_at_end = 0; | |
6166 | int zv_at_end = 0; | |
6167 | Lisp_Object old_deactivate_mark, tem; | |
6052529b | 6168 | struct gcpro gcpro1; |
5f5c8ee5 GM |
6169 | |
6170 | old_deactivate_mark = Vdeactivate_mark; | |
6171 | oldbuf = current_buffer; | |
6a94510a | 6172 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
6173 | current_buffer->undo_list = Qt; |
6174 | ||
b14bc55e RS |
6175 | oldpoint = message_dolog_marker1; |
6176 | set_marker_restricted (oldpoint, make_number (PT), Qnil); | |
6177 | oldbegv = message_dolog_marker2; | |
6178 | set_marker_restricted (oldbegv, make_number (BEGV), Qnil); | |
6179 | oldzv = message_dolog_marker3; | |
6180 | set_marker_restricted (oldzv, make_number (ZV), Qnil); | |
6181 | GCPRO1 (old_deactivate_mark); | |
5f5c8ee5 GM |
6182 | |
6183 | if (PT == Z) | |
6184 | point_at_end = 1; | |
6185 | if (ZV == Z) | |
6186 | zv_at_end = 1; | |
6187 | ||
6188 | BEGV = BEG; | |
6189 | BEGV_BYTE = BEG_BYTE; | |
6190 | ZV = Z; | |
6191 | ZV_BYTE = Z_BYTE; | |
6192 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
6193 | ||
6194 | /* Insert the string--maybe converting multibyte to single byte | |
6195 | or vice versa, so that all the text fits the buffer. */ | |
6196 | if (multibyte | |
6197 | && NILP (current_buffer->enable_multibyte_characters)) | |
6198 | { | |
1e313f28 | 6199 | int i, c, char_bytes; |
5f5c8ee5 | 6200 | unsigned char work[1]; |
2311178e | 6201 | |
5f5c8ee5 GM |
6202 | /* Convert a multibyte string to single-byte |
6203 | for the *Message* buffer. */ | |
6e57ec5e | 6204 | for (i = 0; i < nbytes; i += char_bytes) |
5f5c8ee5 | 6205 | { |
1e313f28 | 6206 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
6207 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
6208 | ? c | |
6209 | : multibyte_char_to_unibyte (c, Qnil)); | |
6210 | insert_1_both (work, 1, 1, 1, 0, 0); | |
6211 | } | |
6212 | } | |
6213 | else if (! multibyte | |
6214 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
6215 | { | |
1e313f28 | 6216 | int i, c, char_bytes; |
5f5c8ee5 | 6217 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 6218 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
6219 | /* Convert a single-byte string to multibyte |
6220 | for the *Message* buffer. */ | |
1e313f28 | 6221 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
6222 | { |
6223 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
6224 | char_bytes = CHAR_STRING (c, str); |
6225 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
6226 | } |
6227 | } | |
1e313f28 GM |
6228 | else if (nbytes) |
6229 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
6230 | |
6231 | if (nlflag) | |
6232 | { | |
6233 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
6234 | insert_1 ("\n", 1, 1, 0, 0); | |
6235 | ||
6236 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
6237 | this_bol = PT; | |
6238 | this_bol_byte = PT_BYTE; | |
6239 | ||
b14bc55e RS |
6240 | /* See if this line duplicates the previous one. |
6241 | If so, combine duplicates. */ | |
5f5c8ee5 GM |
6242 | if (this_bol > BEG) |
6243 | { | |
6244 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
6245 | prev_bol = PT; | |
6246 | prev_bol_byte = PT_BYTE; | |
6247 | ||
6248 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
6249 | this_bol, this_bol_byte); | |
6250 | if (dup) | |
6251 | { | |
6252 | del_range_both (prev_bol, prev_bol_byte, | |
6253 | this_bol, this_bol_byte, 0); | |
6254 | if (dup > 1) | |
6255 | { | |
6256 | char dupstr[40]; | |
6257 | int duplen; | |
6258 | ||
6259 | /* If you change this format, don't forget to also | |
6260 | change message_log_check_duplicate. */ | |
6261 | sprintf (dupstr, " [%d times]", dup); | |
6262 | duplen = strlen (dupstr); | |
6263 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
6264 | insert_1 (dupstr, duplen, 1, 0, 1); | |
6265 | } | |
6266 | } | |
6267 | } | |
6268 | ||
b14bc55e RS |
6269 | /* If we have more than the desired maximum number of lines |
6270 | in the *Messages* buffer now, delete the oldest ones. | |
6271 | This is safe because we don't have undo in this buffer. */ | |
6272 | ||
5f5c8ee5 GM |
6273 | if (NATNUMP (Vmessage_log_max)) |
6274 | { | |
6275 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
6276 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
6277 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
6278 | } | |
6279 | } | |
6280 | BEGV = XMARKER (oldbegv)->charpos; | |
6281 | BEGV_BYTE = marker_byte_position (oldbegv); | |
6282 | ||
6283 | if (zv_at_end) | |
6284 | { | |
6285 | ZV = Z; | |
6286 | ZV_BYTE = Z_BYTE; | |
6287 | } | |
6288 | else | |
6289 | { | |
6290 | ZV = XMARKER (oldzv)->charpos; | |
6291 | ZV_BYTE = marker_byte_position (oldzv); | |
6292 | } | |
6293 | ||
6294 | if (point_at_end) | |
6295 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
6296 | else | |
6297 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
6298 | Lisp code. */ | |
6299 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
6300 | XMARKER (oldpoint)->bytepos); | |
6301 | ||
6302 | UNGCPRO; | |
cfea0546 SM |
6303 | unchain_marker (XMARKER (oldpoint)); |
6304 | unchain_marker (XMARKER (oldbegv)); | |
6305 | unchain_marker (XMARKER (oldzv)); | |
5f5c8ee5 GM |
6306 | |
6307 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
6308 | set_buffer_internal (oldbuf); | |
6309 | if (NILP (tem)) | |
6310 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
6311 | message_log_need_newline = !nlflag; | |
6312 | Vdeactivate_mark = old_deactivate_mark; | |
6313 | } | |
6314 | } | |
6315 | ||
6316 | ||
6317 | /* We are at the end of the buffer after just having inserted a newline. | |
6318 | (Note: We depend on the fact we won't be crossing the gap.) | |
6319 | Check to see if the most recent message looks a lot like the previous one. | |
6320 | Return 0 if different, 1 if the new one should just replace it, or a | |
6321 | value N > 1 if we should also append " [N times]". */ | |
6322 | ||
6323 | static int | |
6324 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
6325 | int prev_bol, this_bol; | |
6326 | int prev_bol_byte, this_bol_byte; | |
6327 | { | |
6328 | int i; | |
6329 | int len = Z_BYTE - 1 - this_bol_byte; | |
6330 | int seen_dots = 0; | |
6331 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
6332 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
6333 | ||
6334 | for (i = 0; i < len; i++) | |
6335 | { | |
509633e3 | 6336 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
6337 | seen_dots = 1; |
6338 | if (p1[i] != p2[i]) | |
6339 | return seen_dots; | |
6340 | } | |
6341 | p1 += len; | |
6342 | if (*p1 == '\n') | |
6343 | return 2; | |
6344 | if (*p1++ == ' ' && *p1++ == '[') | |
6345 | { | |
6346 | int n = 0; | |
6347 | while (*p1 >= '0' && *p1 <= '9') | |
6348 | n = n * 10 + *p1++ - '0'; | |
6349 | if (strncmp (p1, " times]\n", 8) == 0) | |
6350 | return n+1; | |
6351 | } | |
6352 | return 0; | |
6353 | } | |
6354 | ||
6355 | ||
1e313f28 GM |
6356 | /* Display an echo area message M with a specified length of NBYTES |
6357 | bytes. The string may include null characters. If M is 0, clear | |
6358 | out any existing message, and let the mini-buffer text show | |
6359 | through. | |
5f5c8ee5 GM |
6360 | |
6361 | The buffer M must continue to exist until after the echo area gets | |
6362 | cleared or some other message gets displayed there. This means do | |
6363 | not pass text that is stored in a Lisp string; do not pass text in | |
6364 | a buffer that was alloca'd. */ | |
6365 | ||
6366 | void | |
1e313f28 | 6367 | message2 (m, nbytes, multibyte) |
50f80c2f | 6368 | const char *m; |
1e313f28 | 6369 | int nbytes; |
5f5c8ee5 GM |
6370 | int multibyte; |
6371 | { | |
6372 | /* First flush out any partial line written with print. */ | |
6373 | message_log_maybe_newline (); | |
6374 | if (m) | |
1e313f28 GM |
6375 | message_dolog (m, nbytes, 1, multibyte); |
6376 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
6377 | } |
6378 | ||
6379 | ||
6380 | /* The non-logging counterpart of message2. */ | |
6381 | ||
6382 | void | |
1e313f28 | 6383 | message2_nolog (m, nbytes, multibyte) |
50f80c2f | 6384 | const char *m; |
e3383b6f | 6385 | int nbytes, multibyte; |
5f5c8ee5 | 6386 | { |
886bd6f2 | 6387 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6388 | message_enable_multibyte = multibyte; |
6389 | ||
6390 | if (noninteractive) | |
6391 | { | |
6392 | if (noninteractive_need_newline) | |
6393 | putc ('\n', stderr); | |
6394 | noninteractive_need_newline = 0; | |
6395 | if (m) | |
1e313f28 | 6396 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
6397 | if (cursor_in_echo_area == 0) |
6398 | fprintf (stderr, "\n"); | |
6399 | fflush (stderr); | |
6400 | } | |
6401 | /* A null message buffer means that the frame hasn't really been | |
6402 | initialized yet. Error messages get reported properly by | |
6403 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 6404 | else if (INTERACTIVE |
886bd6f2 GM |
6405 | && sf->glyphs_initialized_p |
6406 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
6407 | { |
6408 | Lisp_Object mini_window; | |
6409 | struct frame *f; | |
6410 | ||
6411 | /* Get the frame containing the mini-buffer | |
6412 | that the selected frame is using. */ | |
886bd6f2 | 6413 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6414 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6415 | ||
6416 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 6417 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
6418 | && ! FRAME_VISIBLE_P (f)) |
6419 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
6420 | ||
6421 | if (m) | |
6422 | { | |
1e313f28 | 6423 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
6424 | if (minibuffer_auto_raise) |
6425 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
6426 | } | |
6427 | else | |
c6e89d6c | 6428 | clear_message (1, 1); |
5f5c8ee5 | 6429 | |
c6e89d6c | 6430 | do_pending_window_change (0); |
5f5c8ee5 | 6431 | echo_area_display (1); |
c6e89d6c | 6432 | do_pending_window_change (0); |
5f5c8ee5 GM |
6433 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
6434 | (*frame_up_to_date_hook) (f); | |
6435 | } | |
6436 | } | |
6437 | ||
6438 | ||
c6e89d6c GM |
6439 | /* Display an echo area message M with a specified length of NBYTES |
6440 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
6441 | string, clear out any existing message, and let the mini-buffer |
6442 | text show through. */ | |
6443 | ||
6444 | void | |
c6e89d6c | 6445 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 6446 | Lisp_Object m; |
c6e89d6c | 6447 | int nbytes; |
5f5c8ee5 GM |
6448 | int multibyte; |
6449 | { | |
6450 | struct gcpro gcpro1; | |
6451 | ||
6452 | GCPRO1 (m); | |
2311178e | 6453 | |
5f5c8ee5 GM |
6454 | /* First flush out any partial line written with print. */ |
6455 | message_log_maybe_newline (); | |
6456 | if (STRINGP (m)) | |
2051c264 | 6457 | message_dolog (SDATA (m), nbytes, 1, multibyte); |
c6e89d6c | 6458 | message3_nolog (m, nbytes, multibyte); |
5f5c8ee5 GM |
6459 | |
6460 | UNGCPRO; | |
6461 | } | |
6462 | ||
6463 | ||
6464 | /* The non-logging version of message3. */ | |
6465 | ||
6466 | void | |
c6e89d6c | 6467 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 6468 | Lisp_Object m; |
c6e89d6c | 6469 | int nbytes, multibyte; |
5f5c8ee5 | 6470 | { |
886bd6f2 | 6471 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6472 | message_enable_multibyte = multibyte; |
6473 | ||
6474 | if (noninteractive) | |
6475 | { | |
6476 | if (noninteractive_need_newline) | |
6477 | putc ('\n', stderr); | |
6478 | noninteractive_need_newline = 0; | |
6479 | if (STRINGP (m)) | |
2051c264 | 6480 | fwrite (SDATA (m), nbytes, 1, stderr); |
5f5c8ee5 GM |
6481 | if (cursor_in_echo_area == 0) |
6482 | fprintf (stderr, "\n"); | |
6483 | fflush (stderr); | |
6484 | } | |
6485 | /* A null message buffer means that the frame hasn't really been | |
6486 | initialized yet. Error messages get reported properly by | |
6487 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 6488 | else if (INTERACTIVE |
886bd6f2 GM |
6489 | && sf->glyphs_initialized_p |
6490 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
6491 | { |
6492 | Lisp_Object mini_window; | |
c6e89d6c | 6493 | Lisp_Object frame; |
5f5c8ee5 GM |
6494 | struct frame *f; |
6495 | ||
6496 | /* Get the frame containing the mini-buffer | |
6497 | that the selected frame is using. */ | |
886bd6f2 | 6498 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6499 | frame = XWINDOW (mini_window)->frame; |
6500 | f = XFRAME (frame); | |
5f5c8ee5 GM |
6501 | |
6502 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 6503 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
6504 | && !FRAME_VISIBLE_P (f)) |
6505 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 6506 | |
2051c264 | 6507 | if (STRINGP (m) && SCHARS (m) > 0) |
5f5c8ee5 | 6508 | { |
c6e89d6c | 6509 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
6510 | if (minibuffer_auto_raise) |
6511 | Fraise_frame (frame); | |
5f5c8ee5 GM |
6512 | } |
6513 | else | |
c6e89d6c | 6514 | clear_message (1, 1); |
5f5c8ee5 | 6515 | |
c6e89d6c | 6516 | do_pending_window_change (0); |
5f5c8ee5 | 6517 | echo_area_display (1); |
c6e89d6c | 6518 | do_pending_window_change (0); |
5f5c8ee5 GM |
6519 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
6520 | (*frame_up_to_date_hook) (f); | |
6521 | } | |
6522 | } | |
6523 | ||
6524 | ||
6525 | /* Display a null-terminated echo area message M. If M is 0, clear | |
6526 | out any existing message, and let the mini-buffer text show through. | |
6527 | ||
6528 | The buffer M must continue to exist until after the echo area gets | |
6529 | cleared or some other message gets displayed there. Do not pass | |
6530 | text that is stored in a Lisp string. Do not pass text in a buffer | |
6531 | that was alloca'd. */ | |
6532 | ||
6533 | void | |
6534 | message1 (m) | |
6535 | char *m; | |
6536 | { | |
6537 | message2 (m, (m ? strlen (m) : 0), 0); | |
6538 | } | |
6539 | ||
6540 | ||
6541 | /* The non-logging counterpart of message1. */ | |
6542 | ||
6543 | void | |
6544 | message1_nolog (m) | |
6545 | char *m; | |
6546 | { | |
6547 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
6548 | } | |
6549 | ||
6550 | /* Display a message M which contains a single %s | |
6551 | which gets replaced with STRING. */ | |
6552 | ||
6553 | void | |
6554 | message_with_string (m, string, log) | |
6555 | char *m; | |
6556 | Lisp_Object string; | |
6557 | int log; | |
6558 | { | |
5b6d51b6 RS |
6559 | CHECK_STRING (string); |
6560 | ||
5f5c8ee5 GM |
6561 | if (noninteractive) |
6562 | { | |
6563 | if (m) | |
6564 | { | |
6565 | if (noninteractive_need_newline) | |
6566 | putc ('\n', stderr); | |
6567 | noninteractive_need_newline = 0; | |
2051c264 | 6568 | fprintf (stderr, m, SDATA (string)); |
5f5c8ee5 GM |
6569 | if (cursor_in_echo_area == 0) |
6570 | fprintf (stderr, "\n"); | |
6571 | fflush (stderr); | |
6572 | } | |
6573 | } | |
6574 | else if (INTERACTIVE) | |
6575 | { | |
6576 | /* The frame whose minibuffer we're going to display the message on. | |
6577 | It may be larger than the selected frame, so we need | |
6578 | to use its buffer, not the selected frame's buffer. */ | |
6579 | Lisp_Object mini_window; | |
886bd6f2 | 6580 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6581 | |
6582 | /* Get the frame containing the minibuffer | |
6583 | that the selected frame is using. */ | |
886bd6f2 | 6584 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6585 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6586 | ||
6587 | /* A null message buffer means that the frame hasn't really been | |
6588 | initialized yet. Error messages get reported properly by | |
6589 | cmd_error, so this must be just an informative message; toss it. */ | |
6590 | if (FRAME_MESSAGE_BUF (f)) | |
6591 | { | |
eb484132 GM |
6592 | Lisp_Object args[2], message; |
6593 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 6594 | |
eb484132 GM |
6595 | args[0] = build_string (m); |
6596 | args[1] = message = string; | |
78e17433 | 6597 | GCPRO2 (args[0], message); |
eb484132 | 6598 | gcpro1.nvars = 2; |
2311178e | 6599 | |
eb484132 | 6600 | message = Fformat (2, args); |
5f5c8ee5 GM |
6601 | |
6602 | if (log) | |
d5db4077 | 6603 | message3 (message, SBYTES (message), STRING_MULTIBYTE (message)); |
5f5c8ee5 | 6604 | else |
d5db4077 | 6605 | message3_nolog (message, SBYTES (message), STRING_MULTIBYTE (message)); |
eb484132 GM |
6606 | |
6607 | UNGCPRO; | |
5f5c8ee5 GM |
6608 | |
6609 | /* Print should start at the beginning of the message | |
6610 | buffer next time. */ | |
6611 | message_buf_print = 0; | |
6612 | } | |
6613 | } | |
6614 | } | |
6615 | ||
6616 | ||
5f5c8ee5 GM |
6617 | /* Dump an informative message to the minibuf. If M is 0, clear out |
6618 | any existing message, and let the mini-buffer text show through. */ | |
6619 | ||
6620 | /* VARARGS 1 */ | |
6621 | void | |
6622 | message (m, a1, a2, a3) | |
6623 | char *m; | |
6624 | EMACS_INT a1, a2, a3; | |
6625 | { | |
6626 | if (noninteractive) | |
6627 | { | |
6628 | if (m) | |
6629 | { | |
6630 | if (noninteractive_need_newline) | |
6631 | putc ('\n', stderr); | |
6632 | noninteractive_need_newline = 0; | |
6633 | fprintf (stderr, m, a1, a2, a3); | |
6634 | if (cursor_in_echo_area == 0) | |
6635 | fprintf (stderr, "\n"); | |
6636 | fflush (stderr); | |
6637 | } | |
6638 | } | |
6639 | else if (INTERACTIVE) | |
6640 | { | |
6641 | /* The frame whose mini-buffer we're going to display the message | |
6642 | on. It may be larger than the selected frame, so we need to | |
6643 | use its buffer, not the selected frame's buffer. */ | |
6644 | Lisp_Object mini_window; | |
886bd6f2 | 6645 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6646 | |
6647 | /* Get the frame containing the mini-buffer | |
6648 | that the selected frame is using. */ | |
886bd6f2 | 6649 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6650 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6651 | ||
6652 | /* A null message buffer means that the frame hasn't really been | |
6653 | initialized yet. Error messages get reported properly by | |
6654 | cmd_error, so this must be just an informative message; toss | |
6655 | it. */ | |
6656 | if (FRAME_MESSAGE_BUF (f)) | |
6657 | { | |
6658 | if (m) | |
6659 | { | |
6660 | int len; | |
6661 | #ifdef NO_ARG_ARRAY | |
6662 | char *a[3]; | |
6663 | a[0] = (char *) a1; | |
6664 | a[1] = (char *) a2; | |
6665 | a[2] = (char *) a3; | |
6666 | ||
6667 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6668 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6669 | #else | |
6670 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6671 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
6672 | (char **) &a1); | |
6673 | #endif /* NO_ARG_ARRAY */ | |
6674 | ||
6675 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
6676 | } | |
6677 | else | |
6678 | message1 (0); | |
6679 | ||
6680 | /* Print should start at the beginning of the message | |
6681 | buffer next time. */ | |
6682 | message_buf_print = 0; | |
6683 | } | |
6684 | } | |
6685 | } | |
6686 | ||
6687 | ||
6688 | /* The non-logging version of message. */ | |
6689 | ||
6690 | void | |
6691 | message_nolog (m, a1, a2, a3) | |
6692 | char *m; | |
6693 | EMACS_INT a1, a2, a3; | |
6694 | { | |
6695 | Lisp_Object old_log_max; | |
6696 | old_log_max = Vmessage_log_max; | |
6697 | Vmessage_log_max = Qnil; | |
6698 | message (m, a1, a2, a3); | |
6699 | Vmessage_log_max = old_log_max; | |
6700 | } | |
6701 | ||
6702 | ||
c6e89d6c GM |
6703 | /* Display the current message in the current mini-buffer. This is |
6704 | only called from error handlers in process.c, and is not time | |
6705 | critical. */ | |
5f5c8ee5 GM |
6706 | |
6707 | void | |
6708 | update_echo_area () | |
6709 | { | |
c6e89d6c GM |
6710 | if (!NILP (echo_area_buffer[0])) |
6711 | { | |
6712 | Lisp_Object string; | |
6713 | string = Fcurrent_message (); | |
2311178e | 6714 | message3 (string, SBYTES (string), |
c6e89d6c GM |
6715 | !NILP (current_buffer->enable_multibyte_characters)); |
6716 | } | |
6717 | } | |
6718 | ||
6719 | ||
a67e162b RS |
6720 | /* Make sure echo area buffers in `echo_buffers' are live. |
6721 | If they aren't, make new ones. */ | |
5bcfeb49 GM |
6722 | |
6723 | static void | |
6724 | ensure_echo_area_buffers () | |
6725 | { | |
6726 | int i; | |
6727 | ||
6728 | for (i = 0; i < 2; ++i) | |
6729 | if (!BUFFERP (echo_buffer[i]) | |
6730 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
6731 | { | |
6732 | char name[30]; | |
ff3d9573 GM |
6733 | Lisp_Object old_buffer; |
6734 | int j; | |
6735 | ||
6736 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
6737 | sprintf (name, " *Echo Area %d*", i); |
6738 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 6739 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
6740 | |
6741 | for (j = 0; j < 2; ++j) | |
6742 | if (EQ (old_buffer, echo_area_buffer[j])) | |
6743 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
6744 | } |
6745 | } | |
6746 | ||
6747 | ||
23a96c77 | 6748 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
6749 | echo_area_buffer as current buffer. |
6750 | ||
6751 | WHICH zero means use the current message buffer | |
6752 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
6753 | from echo_buffer[] and clear it. | |
6754 | ||
6755 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
6756 | suitable buffer from echo_buffer[] and clear it. | |
6757 | ||
6758 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
6759 | that the current message becomes the last displayed one, make | |
6760 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
6761 | ||
4b41cebb | 6762 | Value is what FN returns. */ |
c6e89d6c GM |
6763 | |
6764 | static int | |
23a96c77 | 6765 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
6766 | struct window *w; |
6767 | int which; | |
23dd2d97 KR |
6768 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
6769 | EMACS_INT a1; | |
6770 | Lisp_Object a2; | |
6771 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6772 | { |
6773 | Lisp_Object buffer; | |
15e26c76 | 6774 | int this_one, the_other, clear_buffer_p, rc; |
331379bf | 6775 | int count = SPECPDL_INDEX (); |
c6e89d6c | 6776 | |
9583b2bb | 6777 | /* If buffers aren't live, make new ones. */ |
5bcfeb49 | 6778 | ensure_echo_area_buffers (); |
c6e89d6c GM |
6779 | |
6780 | clear_buffer_p = 0; | |
2311178e | 6781 | |
c6e89d6c GM |
6782 | if (which == 0) |
6783 | this_one = 0, the_other = 1; | |
6784 | else if (which > 0) | |
6785 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 6786 | else |
c6e89d6c GM |
6787 | { |
6788 | this_one = 0, the_other = 1; | |
6789 | clear_buffer_p = 1; | |
2311178e | 6790 | |
c6e89d6c GM |
6791 | /* We need a fresh one in case the current echo buffer equals |
6792 | the one containing the last displayed echo area message. */ | |
6793 | if (!NILP (echo_area_buffer[this_one]) | |
6794 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
6795 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
6796 | } |
6797 | ||
6798 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
6799 | have one. */ | |
6800 | if (NILP (echo_area_buffer[this_one])) | |
6801 | { | |
6802 | echo_area_buffer[this_one] | |
6803 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
6804 | ? echo_buffer[the_other] | |
6805 | : echo_buffer[this_one]); | |
6806 | clear_buffer_p = 1; | |
6807 | } | |
6808 | ||
6809 | buffer = echo_area_buffer[this_one]; | |
6810 | ||
1013f4e3 GM |
6811 | /* Don't get confused by reusing the buffer used for echoing |
6812 | for a different purpose. */ | |
032906b1 | 6813 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
6814 | cancel_echoing (); |
6815 | ||
c6e89d6c GM |
6816 | record_unwind_protect (unwind_with_echo_area_buffer, |
6817 | with_echo_area_buffer_unwind_data (w)); | |
6818 | ||
6819 | /* Make the echo area buffer current. Note that for display | |
6820 | purposes, it is not necessary that the displayed window's buffer | |
6821 | == current_buffer, except for text property lookup. So, let's | |
6822 | only set that buffer temporarily here without doing a full | |
6823 | Fset_window_buffer. We must also change w->pointm, though, | |
6824 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
6825 | aborts. */ | |
9142dd5b | 6826 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
6827 | if (w) |
6828 | { | |
6829 | w->buffer = buffer; | |
6830 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
6831 | } | |
ad4f174e | 6832 | |
c6e89d6c GM |
6833 | current_buffer->undo_list = Qt; |
6834 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 6835 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 6836 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
6837 | |
6838 | if (clear_buffer_p && Z > BEG) | |
6839 | del_range (BEG, Z); | |
6840 | ||
6841 | xassert (BEGV >= BEG); | |
6842 | xassert (ZV <= Z && ZV >= BEGV); | |
6843 | ||
23a96c77 | 6844 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
6845 | |
6846 | xassert (BEGV >= BEG); | |
6847 | xassert (ZV <= Z && ZV >= BEGV); | |
6848 | ||
6849 | unbind_to (count, Qnil); | |
6850 | return rc; | |
5f5c8ee5 GM |
6851 | } |
6852 | ||
6853 | ||
c6e89d6c GM |
6854 | /* Save state that should be preserved around the call to the function |
6855 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 6856 | |
c6e89d6c GM |
6857 | static Lisp_Object |
6858 | with_echo_area_buffer_unwind_data (w) | |
6859 | struct window *w; | |
5f5c8ee5 | 6860 | { |
c6e89d6c GM |
6861 | int i = 0; |
6862 | Lisp_Object vector; | |
5f5c8ee5 | 6863 | |
c6e89d6c GM |
6864 | /* Reduce consing by keeping one vector in |
6865 | Vwith_echo_area_save_vector. */ | |
6866 | vector = Vwith_echo_area_save_vector; | |
6867 | Vwith_echo_area_save_vector = Qnil; | |
2311178e | 6868 | |
c6e89d6c | 6869 | if (NILP (vector)) |
9142dd5b | 6870 | vector = Fmake_vector (make_number (7), Qnil); |
2311178e | 6871 | |
a61b7058 GM |
6872 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
6873 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
6874 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
2311178e | 6875 | |
c6e89d6c GM |
6876 | if (w) |
6877 | { | |
a61b7058 GM |
6878 | XSETWINDOW (AREF (vector, i), w); ++i; |
6879 | AREF (vector, i) = w->buffer; ++i; | |
6880 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
6881 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
6882 | } |
6883 | else | |
6884 | { | |
6885 | int end = i + 4; | |
a61b7058 GM |
6886 | for (; i < end; ++i) |
6887 | AREF (vector, i) = Qnil; | |
c6e89d6c | 6888 | } |
5f5c8ee5 | 6889 | |
a61b7058 | 6890 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
6891 | return vector; |
6892 | } | |
5f5c8ee5 | 6893 | |
5f5c8ee5 | 6894 | |
c6e89d6c GM |
6895 | /* Restore global state from VECTOR which was created by |
6896 | with_echo_area_buffer_unwind_data. */ | |
6897 | ||
6898 | static Lisp_Object | |
6899 | unwind_with_echo_area_buffer (vector) | |
6900 | Lisp_Object vector; | |
6901 | { | |
bbbf6d06 GM |
6902 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
6903 | Vdeactivate_mark = AREF (vector, 1); | |
6904 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 6905 | |
bbbf6d06 | 6906 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
6907 | { |
6908 | struct window *w; | |
6909 | Lisp_Object buffer, charpos, bytepos; | |
2311178e | 6910 | |
bbbf6d06 GM |
6911 | w = XWINDOW (AREF (vector, 3)); |
6912 | buffer = AREF (vector, 4); | |
6913 | charpos = AREF (vector, 5); | |
6914 | bytepos = AREF (vector, 6); | |
2311178e | 6915 | |
c6e89d6c GM |
6916 | w->buffer = buffer; |
6917 | set_marker_both (w->pointm, buffer, | |
6918 | XFASTINT (charpos), XFASTINT (bytepos)); | |
6919 | } | |
6920 | ||
6921 | Vwith_echo_area_save_vector = vector; | |
6922 | return Qnil; | |
6923 | } | |
6924 | ||
6925 | ||
6926 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
6927 | non-zero means we will print multibyte. */ | |
6928 | ||
6929 | void | |
6930 | setup_echo_area_for_printing (multibyte_p) | |
6931 | int multibyte_p; | |
6932 | { | |
03b0a4b4 RS |
6933 | /* If we can't find an echo area any more, exit. */ |
6934 | if (! FRAME_LIVE_P (XFRAME (selected_frame))) | |
6935 | Fkill_emacs (Qnil); | |
6936 | ||
5bcfeb49 GM |
6937 | ensure_echo_area_buffers (); |
6938 | ||
c6e89d6c GM |
6939 | if (!message_buf_print) |
6940 | { | |
6941 | /* A message has been output since the last time we printed. | |
6942 | Choose a fresh echo area buffer. */ | |
6943 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 6944 | echo_area_buffer[0] = echo_buffer[1]; |
c6e89d6c GM |
6945 | else |
6946 | echo_area_buffer[0] = echo_buffer[0]; | |
6947 | ||
6948 | /* Switch to that buffer and clear it. */ | |
6949 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 6950 | current_buffer->truncate_lines = Qnil; |
2311178e | 6951 | |
c6e89d6c | 6952 | if (Z > BEG) |
bbbf6d06 | 6953 | { |
331379bf | 6954 | int count = SPECPDL_INDEX (); |
bbbf6d06 | 6955 | specbind (Qinhibit_read_only, Qt); |
a67e162b | 6956 | /* Note that undo recording is always disabled. */ |
bbbf6d06 GM |
6957 | del_range (BEG, Z); |
6958 | unbind_to (count, Qnil); | |
6959 | } | |
c6e89d6c GM |
6960 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6961 | ||
6962 | /* Set up the buffer for the multibyteness we need. */ | |
6963 | if (multibyte_p | |
6964 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6965 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
6966 | ||
6967 | /* Raise the frame containing the echo area. */ | |
6968 | if (minibuffer_auto_raise) | |
6969 | { | |
886bd6f2 | 6970 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6971 | Lisp_Object mini_window; |
886bd6f2 | 6972 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6973 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
6974 | } | |
6975 | ||
8a4e3c0c | 6976 | message_log_maybe_newline (); |
c6e89d6c GM |
6977 | message_buf_print = 1; |
6978 | } | |
fa77249f GM |
6979 | else |
6980 | { | |
6981 | if (NILP (echo_area_buffer[0])) | |
6982 | { | |
6983 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 6984 | echo_area_buffer[0] = echo_buffer[1]; |
fa77249f GM |
6985 | else |
6986 | echo_area_buffer[0] = echo_buffer[0]; | |
6987 | } | |
2311178e | 6988 | |
fa77249f | 6989 | if (current_buffer != XBUFFER (echo_area_buffer[0])) |
ab2c5f0a GM |
6990 | { |
6991 | /* Someone switched buffers between print requests. */ | |
6992 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
6993 | current_buffer->truncate_lines = Qnil; | |
6994 | } | |
fa77249f | 6995 | } |
c6e89d6c GM |
6996 | } |
6997 | ||
6998 | ||
dd2eb166 GM |
6999 | /* Display an echo area message in window W. Value is non-zero if W's |
7000 | height is changed. If display_last_displayed_message_p is | |
7001 | non-zero, display the message that was last displayed, otherwise | |
7002 | display the current message. */ | |
c6e89d6c GM |
7003 | |
7004 | static int | |
7005 | display_echo_area (w) | |
7006 | struct window *w; | |
7007 | { | |
25edb08f GM |
7008 | int i, no_message_p, window_height_changed_p, count; |
7009 | ||
7010 | /* Temporarily disable garbage collections while displaying the echo | |
7011 | area. This is done because a GC can print a message itself. | |
7012 | That message would modify the echo area buffer's contents while a | |
7013 | redisplay of the buffer is going on, and seriously confuse | |
7014 | redisplay. */ | |
7015 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
7016 | |
7017 | /* If there is no message, we must call display_echo_area_1 | |
7018 | nevertheless because it resizes the window. But we will have to | |
7019 | reset the echo_area_buffer in question to nil at the end because | |
7020 | with_echo_area_buffer will sets it to an empty buffer. */ | |
7021 | i = display_last_displayed_message_p ? 1 : 0; | |
7022 | no_message_p = NILP (echo_area_buffer[i]); | |
2311178e | 7023 | |
dd2eb166 GM |
7024 | window_height_changed_p |
7025 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 7026 | display_echo_area_1, |
23dd2d97 | 7027 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
7028 | |
7029 | if (no_message_p) | |
7030 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
7031 | |
7032 | unbind_to (count, Qnil); | |
dd2eb166 | 7033 | return window_height_changed_p; |
c6e89d6c GM |
7034 | } |
7035 | ||
7036 | ||
7037 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
7038 | contains the current echo area message in window W, a mini-window, |
7039 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
7040 | Change the height of W so that all of the message is displayed. |
7041 | Value is non-zero if height of W was changed. */ | |
7042 | ||
7043 | static int | |
23a96c77 | 7044 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
7045 | EMACS_INT a1; |
7046 | Lisp_Object a2; | |
7047 | EMACS_INT a3, a4; | |
c6e89d6c | 7048 | { |
23a96c77 | 7049 | struct window *w = (struct window *) a1; |
c6e89d6c | 7050 | Lisp_Object window; |
c6e89d6c GM |
7051 | struct text_pos start; |
7052 | int window_height_changed_p = 0; | |
7053 | ||
7054 | /* Do this before displaying, so that we have a large enough glyph | |
7055 | matrix for the display. */ | |
92a90e89 | 7056 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
7057 | |
7058 | /* Display. */ | |
7059 | clear_glyph_matrix (w->desired_matrix); | |
7060 | XSETWINDOW (window, w); | |
7061 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
7062 | try_window (window, start); | |
7063 | ||
c6e89d6c GM |
7064 | return window_height_changed_p; |
7065 | } | |
7066 | ||
7067 | ||
92a90e89 | 7068 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
7069 | currently displayed message, if there is one. If a mini-buffer |
7070 | is active, don't shrink it. */ | |
92a90e89 GM |
7071 | |
7072 | void | |
308a74d8 | 7073 | resize_echo_area_exactly () |
92a90e89 GM |
7074 | { |
7075 | if (BUFFERP (echo_area_buffer[0]) | |
7076 | && WINDOWP (echo_area_window)) | |
7077 | { | |
7078 | struct window *w = XWINDOW (echo_area_window); | |
7079 | int resized_p; | |
6d004fea GM |
7080 | Lisp_Object resize_exactly; |
7081 | ||
7082 | if (minibuf_level == 0) | |
7083 | resize_exactly = Qt; | |
7084 | else | |
7085 | resize_exactly = Qnil; | |
2311178e | 7086 | |
23a96c77 | 7087 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 7088 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
7089 | if (resized_p) |
7090 | { | |
7091 | ++windows_or_buffers_changed; | |
7092 | ++update_mode_lines; | |
7093 | redisplay_internal (0); | |
7094 | } | |
7095 | } | |
7096 | } | |
7097 | ||
7098 | ||
23a96c77 | 7099 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 7100 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
7101 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
7102 | size of the text displayed. A3 and A4 are not used. Value is what | |
7103 | resize_mini_window returns. */ | |
23a96c77 GM |
7104 | |
7105 | static int | |
6d004fea | 7106 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 7107 | EMACS_INT a1; |
6d004fea | 7108 | Lisp_Object exactly; |
23dd2d97 | 7109 | EMACS_INT a3, a4; |
23a96c77 | 7110 | { |
6d004fea | 7111 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
7112 | } |
7113 | ||
7114 | ||
92a90e89 GM |
7115 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
7116 | means size the window exactly to the size needed. Otherwise, it's | |
7117 | only enlarged until W's buffer is empty. Value is non-zero if | |
4b41cebb | 7118 | the window height has been changed. */ |
c6e89d6c | 7119 | |
9472f927 | 7120 | int |
92a90e89 | 7121 | resize_mini_window (w, exact_p) |
c6e89d6c | 7122 | struct window *w; |
92a90e89 | 7123 | int exact_p; |
c6e89d6c GM |
7124 | { |
7125 | struct frame *f = XFRAME (w->frame); | |
7126 | int window_height_changed_p = 0; | |
7127 | ||
7128 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 7129 | |
2913a9c0 GM |
7130 | /* Don't resize windows while redisplaying a window; it would |
7131 | confuse redisplay functions when the size of the window they are | |
7132 | displaying changes from under them. Such a resizing can happen, | |
7133 | for instance, when which-func prints a long message while | |
7134 | we are running fontification-functions. We're running these | |
7135 | functions with safe_call which binds inhibit-redisplay to t. */ | |
7136 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 | 7137 | return 0; |
2311178e | 7138 | |
97cafc0f | 7139 | /* Nil means don't try to resize. */ |
6422c1d7 | 7140 | if (NILP (Vresize_mini_windows) |
fa3c6b4d | 7141 | || (FRAME_X_P (f) && FRAME_X_OUTPUT (f) == NULL)) |
97cafc0f | 7142 | return 0; |
2311178e | 7143 | |
c6e89d6c GM |
7144 | if (!FRAME_MINIBUF_ONLY_P (f)) |
7145 | { | |
7146 | struct it it; | |
dd2eb166 | 7147 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
da8b7f4f | 7148 | int total_height = WINDOW_TOTAL_LINES (root) + WINDOW_TOTAL_LINES (w); |
dd2eb166 | 7149 | int height, max_height; |
da8b7f4f | 7150 | int unit = FRAME_LINE_HEIGHT (f); |
dd2eb166 | 7151 | struct text_pos start; |
1bfdbe43 GM |
7152 | struct buffer *old_current_buffer = NULL; |
7153 | ||
7154 | if (current_buffer != XBUFFER (w->buffer)) | |
7155 | { | |
7156 | old_current_buffer = current_buffer; | |
7157 | set_buffer_internal (XBUFFER (w->buffer)); | |
7158 | } | |
9142dd5b | 7159 | |
c6e89d6c | 7160 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 7161 | |
dd2eb166 GM |
7162 | /* Compute the max. number of lines specified by the user. */ |
7163 | if (FLOATP (Vmax_mini_window_height)) | |
da8b7f4f | 7164 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_LINES (f); |
dd2eb166 GM |
7165 | else if (INTEGERP (Vmax_mini_window_height)) |
7166 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
7167 | else |
7168 | max_height = total_height / 4; | |
2311178e | 7169 | |
4b41cebb | 7170 | /* Correct that max. height if it's bogus. */ |
dd2eb166 GM |
7171 | max_height = max (1, max_height); |
7172 | max_height = min (total_height, max_height); | |
2311178e | 7173 | |
dd2eb166 | 7174 | /* Find out the height of the text in the window. */ |
ad4f174e GM |
7175 | if (it.truncate_lines_p) |
7176 | height = 1; | |
55b064bd | 7177 | else |
ad4f174e GM |
7178 | { |
7179 | last_height = 0; | |
7180 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
7181 | if (it.max_ascent == 0 && it.max_descent == 0) | |
7182 | height = it.current_y + last_height; | |
7183 | else | |
7184 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 7185 | height -= it.extra_line_spacing; |
ad4f174e GM |
7186 | height = (height + unit - 1) / unit; |
7187 | } | |
2311178e | 7188 | |
dd2eb166 GM |
7189 | /* Compute a suitable window start. */ |
7190 | if (height > max_height) | |
7191 | { | |
7192 | height = max_height; | |
7193 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
7194 | move_it_vertically_backward (&it, (height - 1) * unit); | |
7195 | start = it.current.pos; | |
7196 | } | |
7197 | else | |
7198 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
7199 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 7200 | |
6422c1d7 | 7201 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 7202 | { |
6422c1d7 GM |
7203 | /* Let it grow only, until we display an empty message, in which |
7204 | case the window shrinks again. */ | |
da8b7f4f | 7205 | if (height > WINDOW_TOTAL_LINES (w)) |
6422c1d7 | 7206 | { |
da8b7f4f | 7207 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 | 7208 | freeze_window_starts (f, 1); |
da8b7f4f KS |
7209 | grow_mini_window (w, height - WINDOW_TOTAL_LINES (w)); |
7210 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; | |
6422c1d7 | 7211 | } |
da8b7f4f | 7212 | else if (height < WINDOW_TOTAL_LINES (w) |
6422c1d7 GM |
7213 | && (exact_p || BEGV == ZV)) |
7214 | { | |
da8b7f4f | 7215 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 GM |
7216 | freeze_window_starts (f, 0); |
7217 | shrink_mini_window (w); | |
da8b7f4f | 7218 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; |
6422c1d7 | 7219 | } |
da448723 | 7220 | } |
2311178e | 7221 | else |
da448723 | 7222 | { |
6422c1d7 | 7223 | /* Always resize to exact size needed. */ |
da8b7f4f | 7224 | if (height > WINDOW_TOTAL_LINES (w)) |
6422c1d7 | 7225 | { |
da8b7f4f | 7226 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 | 7227 | freeze_window_starts (f, 1); |
da8b7f4f KS |
7228 | grow_mini_window (w, height - WINDOW_TOTAL_LINES (w)); |
7229 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; | |
6422c1d7 | 7230 | } |
da8b7f4f | 7231 | else if (height < WINDOW_TOTAL_LINES (w)) |
6422c1d7 | 7232 | { |
da8b7f4f | 7233 | int old_height = WINDOW_TOTAL_LINES (w); |
6422c1d7 GM |
7234 | freeze_window_starts (f, 0); |
7235 | shrink_mini_window (w); | |
7236 | ||
7237 | if (height) | |
7238 | { | |
7239 | freeze_window_starts (f, 1); | |
da8b7f4f | 7240 | grow_mini_window (w, height - WINDOW_TOTAL_LINES (w)); |
6422c1d7 | 7241 | } |
2311178e | 7242 | |
da8b7f4f | 7243 | window_height_changed_p = WINDOW_TOTAL_LINES (w) != old_height; |
6422c1d7 | 7244 | } |
9142dd5b | 7245 | } |
1bfdbe43 GM |
7246 | |
7247 | if (old_current_buffer) | |
7248 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
7249 | } |
7250 | ||
7251 | return window_height_changed_p; | |
7252 | } | |
7253 | ||
7254 | ||
7255 | /* Value is the current message, a string, or nil if there is no | |
7256 | current message. */ | |
7257 | ||
7258 | Lisp_Object | |
7259 | current_message () | |
7260 | { | |
7261 | Lisp_Object msg; | |
7262 | ||
7263 | if (NILP (echo_area_buffer[0])) | |
7264 | msg = Qnil; | |
7265 | else | |
7266 | { | |
23a96c77 | 7267 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 7268 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
7269 | if (NILP (msg)) |
7270 | echo_area_buffer[0] = Qnil; | |
7271 | } | |
2311178e | 7272 | |
c6e89d6c GM |
7273 | return msg; |
7274 | } | |
7275 | ||
7276 | ||
7277 | static int | |
23a96c77 | 7278 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
7279 | EMACS_INT a1; |
7280 | Lisp_Object a2; | |
7281 | EMACS_INT a3, a4; | |
c6e89d6c | 7282 | { |
23a96c77 | 7283 | Lisp_Object *msg = (Lisp_Object *) a1; |
2311178e | 7284 | |
c6e89d6c GM |
7285 | if (Z > BEG) |
7286 | *msg = make_buffer_string (BEG, Z, 1); | |
7287 | else | |
7288 | *msg = Qnil; | |
7289 | return 0; | |
7290 | } | |
7291 | ||
7292 | ||
7293 | /* Push the current message on Vmessage_stack for later restauration | |
7294 | by restore_message. Value is non-zero if the current message isn't | |
7295 | empty. This is a relatively infrequent operation, so it's not | |
7296 | worth optimizing. */ | |
7297 | ||
7298 | int | |
7299 | push_message () | |
7300 | { | |
7301 | Lisp_Object msg; | |
7302 | msg = current_message (); | |
7303 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
7304 | return STRINGP (msg); | |
7305 | } | |
7306 | ||
7307 | ||
7308 | /* Restore message display from the top of Vmessage_stack. */ | |
7309 | ||
7310 | void | |
7311 | restore_message () | |
7312 | { | |
7313 | Lisp_Object msg; | |
2311178e | 7314 | |
c6e89d6c GM |
7315 | xassert (CONSP (Vmessage_stack)); |
7316 | msg = XCAR (Vmessage_stack); | |
7317 | if (STRINGP (msg)) | |
d5db4077 | 7318 | message3_nolog (msg, SBYTES (msg), STRING_MULTIBYTE (msg)); |
c6e89d6c GM |
7319 | else |
7320 | message3_nolog (msg, 0, 0); | |
7321 | } | |
7322 | ||
7323 | ||
37d66095 RS |
7324 | /* Handler for record_unwind_protect calling pop_message. */ |
7325 | ||
7326 | Lisp_Object | |
7327 | pop_message_unwind (dummy) | |
7328 | Lisp_Object dummy; | |
7329 | { | |
7330 | pop_message (); | |
7331 | return Qnil; | |
7332 | } | |
7333 | ||
c6e89d6c GM |
7334 | /* Pop the top-most entry off Vmessage_stack. */ |
7335 | ||
7336 | void | |
7337 | pop_message () | |
7338 | { | |
7339 | xassert (CONSP (Vmessage_stack)); | |
7340 | Vmessage_stack = XCDR (Vmessage_stack); | |
7341 | } | |
7342 | ||
7343 | ||
7344 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
7345 | exits. If the stack is not empty, we have a missing pop_message | |
7346 | somewhere. */ | |
7347 | ||
7348 | void | |
7349 | check_message_stack () | |
7350 | { | |
7351 | if (!NILP (Vmessage_stack)) | |
7352 | abort (); | |
7353 | } | |
7354 | ||
7355 | ||
7356 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
7357 | time we display it---but don't redisplay it now. */ | |
7358 | ||
7359 | void | |
7360 | truncate_echo_area (nchars) | |
7361 | int nchars; | |
7362 | { | |
7363 | if (nchars == 0) | |
7364 | echo_area_buffer[0] = Qnil; | |
7365 | /* A null message buffer means that the frame hasn't really been | |
7366 | initialized yet. Error messages get reported properly by | |
7367 | cmd_error, so this must be just an informative message; toss it. */ | |
7368 | else if (!noninteractive | |
7369 | && INTERACTIVE | |
c6e89d6c | 7370 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
7371 | { |
7372 | struct frame *sf = SELECTED_FRAME (); | |
7373 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 7374 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 7375 | } |
c6e89d6c GM |
7376 | } |
7377 | ||
7378 | ||
7379 | /* Helper function for truncate_echo_area. Truncate the current | |
7380 | message to at most NCHARS characters. */ | |
7381 | ||
7382 | static int | |
23a96c77 | 7383 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
7384 | EMACS_INT nchars; |
7385 | Lisp_Object a2; | |
7386 | EMACS_INT a3, a4; | |
c6e89d6c GM |
7387 | { |
7388 | if (BEG + nchars < Z) | |
7389 | del_range (BEG + nchars, Z); | |
7390 | if (Z == BEG) | |
7391 | echo_area_buffer[0] = Qnil; | |
7392 | return 0; | |
7393 | } | |
7394 | ||
7395 | ||
7396 | /* Set the current message to a substring of S or STRING. | |
7397 | ||
7398 | If STRING is a Lisp string, set the message to the first NBYTES | |
7399 | bytes from STRING. NBYTES zero means use the whole string. If | |
7400 | STRING is multibyte, the message will be displayed multibyte. | |
7401 | ||
7402 | If S is not null, set the message to the first LEN bytes of S. LEN | |
7403 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
7404 | multibyte. Display the message multibyte in that case. */ | |
7405 | ||
7406 | void | |
7407 | set_message (s, string, nbytes, multibyte_p) | |
50f80c2f | 7408 | const char *s; |
c6e89d6c | 7409 | Lisp_Object string; |
e3383b6f | 7410 | int nbytes, multibyte_p; |
c6e89d6c GM |
7411 | { |
7412 | message_enable_multibyte | |
7413 | = ((s && multibyte_p) | |
7414 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
2311178e | 7415 | |
23a96c77 GM |
7416 | with_echo_area_buffer (0, -1, set_message_1, |
7417 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c | 7418 | message_buf_print = 0; |
21fdfb65 | 7419 | help_echo_showing_p = 0; |
c6e89d6c GM |
7420 | } |
7421 | ||
7422 | ||
7423 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
7424 | as there, with A1 corresponding to S and A2 corresponding to STRING |
7425 | This function is called with the echo area buffer being | |
c6e89d6c GM |
7426 | current. */ |
7427 | ||
7428 | static int | |
23a96c77 | 7429 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
7430 | EMACS_INT a1; |
7431 | Lisp_Object a2; | |
7432 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 7433 | { |
50f80c2f | 7434 | const char *s = (const char *) a1; |
23dd2d97 | 7435 | Lisp_Object string = a2; |
2311178e | 7436 | |
c6e89d6c | 7437 | xassert (BEG == Z); |
2311178e | 7438 | |
c6e89d6c GM |
7439 | /* Change multibyteness of the echo buffer appropriately. */ |
7440 | if (message_enable_multibyte | |
7441 | != !NILP (current_buffer->enable_multibyte_characters)) | |
7442 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
7443 | ||
ad4f174e | 7444 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
2311178e | 7445 | |
c6e89d6c GM |
7446 | /* Insert new message at BEG. */ |
7447 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
7448 | ||
7449 | if (STRINGP (string)) | |
7450 | { | |
7451 | int nchars; | |
2311178e | 7452 | |
c6e89d6c | 7453 | if (nbytes == 0) |
2051c264 | 7454 | nbytes = SBYTES (string); |
c6e89d6c | 7455 | nchars = string_byte_to_char (string, nbytes); |
2311178e | 7456 | |
c6e89d6c GM |
7457 | /* This function takes care of single/multibyte conversion. We |
7458 | just have to ensure that the echo area buffer has the right | |
7459 | setting of enable_multibyte_characters. */ | |
7460 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
7461 | } | |
7462 | else if (s) | |
7463 | { | |
7464 | if (nbytes == 0) | |
7465 | nbytes = strlen (s); | |
2311178e | 7466 | |
c6e89d6c GM |
7467 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) |
7468 | { | |
7469 | /* Convert from multi-byte to single-byte. */ | |
7470 | int i, c, n; | |
7471 | unsigned char work[1]; | |
2311178e | 7472 | |
c6e89d6c GM |
7473 | /* Convert a multibyte string to single-byte. */ |
7474 | for (i = 0; i < nbytes; i += n) | |
7475 | { | |
7476 | c = string_char_and_length (s + i, nbytes - i, &n); | |
7477 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
7478 | ? c | |
7479 | : multibyte_char_to_unibyte (c, Qnil)); | |
7480 | insert_1_both (work, 1, 1, 1, 0, 0); | |
7481 | } | |
7482 | } | |
7483 | else if (!multibyte_p | |
7484 | && !NILP (current_buffer->enable_multibyte_characters)) | |
7485 | { | |
7486 | /* Convert from single-byte to multi-byte. */ | |
7487 | int i, c, n; | |
50f80c2f | 7488 | const unsigned char *msg = (const unsigned char *) s; |
260a86a0 | 7489 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2311178e | 7490 | |
c6e89d6c GM |
7491 | /* Convert a single-byte string to multibyte. */ |
7492 | for (i = 0; i < nbytes; i++) | |
7493 | { | |
7494 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
7495 | n = CHAR_STRING (c, str); |
7496 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
7497 | } |
7498 | } | |
7499 | else | |
7500 | insert_1 (s, nbytes, 1, 0, 0); | |
7501 | } | |
7502 | ||
7503 | return 0; | |
7504 | } | |
7505 | ||
7506 | ||
7507 | /* Clear messages. CURRENT_P non-zero means clear the current | |
7508 | message. LAST_DISPLAYED_P non-zero means clear the message | |
7509 | last displayed. */ | |
7510 | ||
7511 | void | |
7512 | clear_message (current_p, last_displayed_p) | |
7513 | int current_p, last_displayed_p; | |
7514 | { | |
7515 | if (current_p) | |
6e019995 GM |
7516 | { |
7517 | echo_area_buffer[0] = Qnil; | |
7518 | message_cleared_p = 1; | |
7519 | } | |
2311178e | 7520 | |
c6e89d6c GM |
7521 | if (last_displayed_p) |
7522 | echo_area_buffer[1] = Qnil; | |
2311178e | 7523 | |
c6e89d6c GM |
7524 | message_buf_print = 0; |
7525 | } | |
7526 | ||
7527 | /* Clear garbaged frames. | |
7528 | ||
7529 | This function is used where the old redisplay called | |
7530 | redraw_garbaged_frames which in turn called redraw_frame which in | |
7531 | turn called clear_frame. The call to clear_frame was a source of | |
7532 | flickering. I believe a clear_frame is not necessary. It should | |
7533 | suffice in the new redisplay to invalidate all current matrices, | |
7534 | and ensure a complete redisplay of all windows. */ | |
7535 | ||
7536 | static void | |
7537 | clear_garbaged_frames () | |
7538 | { | |
5f5c8ee5 GM |
7539 | if (frame_garbaged) |
7540 | { | |
5f5c8ee5 | 7541 | Lisp_Object tail, frame; |
5fb96e96 | 7542 | int changed_count = 0; |
2311178e | 7543 | |
5f5c8ee5 GM |
7544 | FOR_EACH_FRAME (tail, frame) |
7545 | { | |
7546 | struct frame *f = XFRAME (frame); | |
2311178e | 7547 | |
5f5c8ee5 GM |
7548 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) |
7549 | { | |
6bb95882 | 7550 | if (f->resized_p) |
573e57f1 | 7551 | Fredraw_frame (frame); |
5f5c8ee5 | 7552 | clear_current_matrices (f); |
5fb96e96 | 7553 | changed_count++; |
5f5c8ee5 | 7554 | f->garbaged = 0; |
6bb95882 | 7555 | f->resized_p = 0; |
5f5c8ee5 GM |
7556 | } |
7557 | } | |
7558 | ||
7559 | frame_garbaged = 0; | |
5fb96e96 RS |
7560 | if (changed_count) |
7561 | ++windows_or_buffers_changed; | |
5f5c8ee5 | 7562 | } |
c6e89d6c | 7563 | } |
5f5c8ee5 | 7564 | |
5f5c8ee5 | 7565 | |
886bd6f2 GM |
7566 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
7567 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 7568 | mini-windows height has been changed. */ |
5f5c8ee5 | 7569 | |
c6e89d6c GM |
7570 | static int |
7571 | echo_area_display (update_frame_p) | |
7572 | int update_frame_p; | |
7573 | { | |
7574 | Lisp_Object mini_window; | |
7575 | struct window *w; | |
7576 | struct frame *f; | |
7577 | int window_height_changed_p = 0; | |
886bd6f2 | 7578 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7579 | |
886bd6f2 | 7580 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7581 | w = XWINDOW (mini_window); |
7582 | f = XFRAME (WINDOW_FRAME (w)); | |
7583 | ||
7584 | /* Don't display if frame is invisible or not yet initialized. */ | |
7585 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
7586 | return 0; | |
5f5c8ee5 | 7587 | |
1a578e9b | 7588 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
e0f712ba | 7589 | #ifndef MAC_OS8 |
1ab3e082 | 7590 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
7591 | /* When Emacs starts, selected_frame may be a visible terminal |
7592 | frame, even if we run under a window system. If we let this | |
7593 | through, a message would be displayed on the terminal. */ | |
2311178e | 7594 | if (EQ (selected_frame, Vterminal_frame) |
622e3754 | 7595 | && !NILP (Vwindow_system)) |
c6e89d6c | 7596 | return 0; |
1ab3e082 | 7597 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 7598 | #endif |
c6e89d6c GM |
7599 | |
7600 | /* Redraw garbaged frames. */ | |
7601 | if (frame_garbaged) | |
7602 | clear_garbaged_frames (); | |
7603 | ||
7604 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
7605 | { | |
7606 | echo_area_window = mini_window; | |
7607 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 7608 | w->must_be_updated_p = 1; |
c59c668a | 7609 | |
d4358b37 GM |
7610 | /* Update the display, unless called from redisplay_internal. |
7611 | Also don't update the screen during redisplay itself. The | |
7612 | update will happen at the end of redisplay, and an update | |
7613 | here could cause confusion. */ | |
7614 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 7615 | { |
715e84c9 | 7616 | int n = 0; |
edc68111 | 7617 | |
715e84c9 GM |
7618 | /* If the display update has been interrupted by pending |
7619 | input, update mode lines in the frame. Due to the | |
7620 | pending input, it might have been that redisplay hasn't | |
7621 | been called, so that mode lines above the echo area are | |
7622 | garbaged. This looks odd, so we prevent it here. */ | |
7623 | if (!display_completed) | |
7624 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
2311178e | 7625 | |
8af1308e GM |
7626 | if (window_height_changed_p |
7627 | /* Don't do this if Emacs is shutting down. Redisplay | |
7628 | needs to run hooks. */ | |
7629 | && !NILP (Vrun_hooks)) | |
c59c668a | 7630 | { |
c06017fb GM |
7631 | /* Must update other windows. Likewise as in other |
7632 | cases, don't let this update be interrupted by | |
7633 | pending input. */ | |
331379bf | 7634 | int count = SPECPDL_INDEX (); |
c06017fb | 7635 | specbind (Qredisplay_dont_pause, Qt); |
edc68111 | 7636 | windows_or_buffers_changed = 1; |
c59c668a | 7637 | redisplay_internal (0); |
c06017fb | 7638 | unbind_to (count, Qnil); |
c59c668a | 7639 | } |
715e84c9 | 7640 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 7641 | { |
edc68111 | 7642 | /* Window configuration is the same as before. |
715e84c9 GM |
7643 | Can do with a display update of the echo area, |
7644 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
7645 | update_single_window (w, 1); |
7646 | rif->flush_display (f); | |
7647 | } | |
7648 | else | |
7649 | update_frame (f, 1, 1); | |
31b6671b GM |
7650 | |
7651 | /* If cursor is in the echo area, make sure that the next | |
7652 | redisplay displays the minibuffer, so that the cursor will | |
7653 | be replaced with what the minibuffer wants. */ | |
7654 | if (cursor_in_echo_area) | |
7655 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
7656 | } |
7657 | } | |
7658 | else if (!EQ (mini_window, selected_window)) | |
7659 | windows_or_buffers_changed++; | |
c59c668a GM |
7660 | |
7661 | /* Last displayed message is now the current message. */ | |
dd2eb166 | 7662 | echo_area_buffer[1] = echo_area_buffer[0]; |
2311178e | 7663 | |
5f5c8ee5 GM |
7664 | /* Prevent redisplay optimization in redisplay_internal by resetting |
7665 | this_line_start_pos. This is done because the mini-buffer now | |
7666 | displays the message instead of its buffer text. */ | |
7667 | if (EQ (mini_window, selected_window)) | |
7668 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
7669 | |
7670 | return window_height_changed_p; | |
5f5c8ee5 GM |
7671 | } |
7672 | ||
7673 | ||
7674 | \f | |
7675 | /*********************************************************************** | |
7676 | Frame Titles | |
7677 | ***********************************************************************/ | |
7678 | ||
7679 | ||
8143e6ab KS |
7680 | /* The frame title buffering code is also used by Fformat_mode_line. |
7681 | So it is not conditioned by HAVE_WINDOW_SYSTEM. */ | |
5f5c8ee5 GM |
7682 | |
7683 | /* A buffer for constructing frame titles in it; allocated from the | |
7684 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
7685 | ||
7686 | static char *frame_title_buf; | |
7687 | ||
7688 | /* The buffer's end, and a current output position in it. */ | |
7689 | ||
7690 | static char *frame_title_buf_end; | |
7691 | static char *frame_title_ptr; | |
7692 | ||
7693 | ||
7694 | /* Store a single character C for the frame title in frame_title_buf. | |
7695 | Re-allocate frame_title_buf if necessary. */ | |
7696 | ||
7697 | static void | |
5d15cc8f DL |
7698 | #ifdef PROTOTYPES |
7699 | store_frame_title_char (char c) | |
7700 | #else | |
5f5c8ee5 GM |
7701 | store_frame_title_char (c) |
7702 | char c; | |
5d15cc8f | 7703 | #endif |
5f5c8ee5 GM |
7704 | { |
7705 | /* If output position has reached the end of the allocated buffer, | |
7706 | double the buffer's size. */ | |
7707 | if (frame_title_ptr == frame_title_buf_end) | |
7708 | { | |
7709 | int len = frame_title_ptr - frame_title_buf; | |
7710 | int new_size = 2 * len * sizeof *frame_title_buf; | |
7711 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
7712 | frame_title_buf_end = frame_title_buf + new_size; | |
7713 | frame_title_ptr = frame_title_buf + len; | |
7714 | } | |
7715 | ||
7716 | *frame_title_ptr++ = c; | |
7717 | } | |
7718 | ||
7719 | ||
7720 | /* Store part of a frame title in frame_title_buf, beginning at | |
d26b89b8 KH |
7721 | frame_title_ptr. STR is the string to store. Do not copy |
7722 | characters that yield more columns than PRECISION; PRECISION <= 0 | |
7723 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
7724 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
7725 | pad. Called from display_mode_element when it is used to build a | |
7726 | frame title. */ | |
5f5c8ee5 GM |
7727 | |
7728 | static int | |
7729 | store_frame_title (str, field_width, precision) | |
50f80c2f | 7730 | const unsigned char *str; |
5f5c8ee5 GM |
7731 | int field_width, precision; |
7732 | { | |
7733 | int n = 0; | |
3b552d56 | 7734 | int dummy, nbytes; |
5f5c8ee5 GM |
7735 | |
7736 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 KH |
7737 | nbytes = strlen (str); |
7738 | n+= c_string_width (str, nbytes, precision, &dummy, &nbytes); | |
7739 | while (nbytes--) | |
7740 | store_frame_title_char (*str++); | |
5f5c8ee5 GM |
7741 | |
7742 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
7743 | while (field_width > 0 | |
7744 | && n < field_width) | |
7745 | { | |
7746 | store_frame_title_char (' '); | |
7747 | ++n; | |
7748 | } | |
7749 | ||
7750 | return n; | |
7751 | } | |
7752 | ||
8143e6ab | 7753 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7754 | |
7755 | /* Set the title of FRAME, if it has changed. The title format is | |
7756 | Vicon_title_format if FRAME is iconified, otherwise it is | |
7757 | frame_title_format. */ | |
7758 | ||
7759 | static void | |
7760 | x_consider_frame_title (frame) | |
7761 | Lisp_Object frame; | |
7762 | { | |
7763 | struct frame *f = XFRAME (frame); | |
7764 | ||
7765 | if (FRAME_WINDOW_P (f) | |
7766 | || FRAME_MINIBUF_ONLY_P (f) | |
7767 | || f->explicit_name) | |
7768 | { | |
7769 | /* Do we have more than one visible frame on this X display? */ | |
7770 | Lisp_Object tail; | |
7771 | Lisp_Object fmt; | |
7772 | struct buffer *obuf; | |
7773 | int len; | |
7774 | struct it it; | |
7775 | ||
9472f927 | 7776 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 7777 | { |
74779f52 JR |
7778 | Lisp_Object other_frame = XCAR (tail); |
7779 | struct frame *tf = XFRAME (other_frame); | |
5f5c8ee5 | 7780 | |
2311178e | 7781 | if (tf != f |
5f5c8ee5 GM |
7782 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
7783 | && !FRAME_MINIBUF_ONLY_P (tf) | |
74779f52 | 7784 | && !EQ (other_frame, tip_frame) |
5f5c8ee5 GM |
7785 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
7786 | break; | |
7787 | } | |
7788 | ||
7789 | /* Set global variable indicating that multiple frames exist. */ | |
7790 | multiple_frames = CONSP (tail); | |
7791 | ||
7792 | /* Switch to the buffer of selected window of the frame. Set up | |
7793 | frame_title_ptr so that display_mode_element will output into it; | |
7794 | then display the title. */ | |
7795 | obuf = current_buffer; | |
bb336f8d | 7796 | set_buffer_internal_1 (XBUFFER (XWINDOW (f->selected_window)->buffer)); |
5f5c8ee5 GM |
7797 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; |
7798 | frame_title_ptr = frame_title_buf; | |
7799 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
7800 | NULL, DEFAULT_FACE_ID); | |
c53a1624 | 7801 | display_mode_element (&it, 0, -1, -1, fmt, Qnil, 0); |
d26b89b8 | 7802 | len = frame_title_ptr - frame_title_buf; |
5f5c8ee5 | 7803 | frame_title_ptr = NULL; |
bb336f8d | 7804 | set_buffer_internal_1 (obuf); |
5f5c8ee5 GM |
7805 | |
7806 | /* Set the title only if it's changed. This avoids consing in | |
7807 | the common case where it hasn't. (If it turns out that we've | |
7808 | already wasted too much time by walking through the list with | |
7809 | display_mode_element, then we might need to optimize at a | |
7810 | higher level than this.) */ | |
2311178e | 7811 | if (! STRINGP (f->name) |
2051c264 GM |
7812 | || SBYTES (f->name) != len |
7813 | || bcmp (frame_title_buf, SDATA (f->name), len) != 0) | |
5f5c8ee5 GM |
7814 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); |
7815 | } | |
7816 | } | |
7817 | ||
5f5c8ee5 GM |
7818 | #endif /* not HAVE_WINDOW_SYSTEM */ |
7819 | ||
7820 | ||
7821 | ||
7822 | \f | |
7823 | /*********************************************************************** | |
7824 | Menu Bars | |
7825 | ***********************************************************************/ | |
7826 | ||
7827 | ||
7828 | /* Prepare for redisplay by updating menu-bar item lists when | |
7829 | appropriate. This can call eval. */ | |
7830 | ||
7831 | void | |
7832 | prepare_menu_bars () | |
7833 | { | |
7834 | int all_windows; | |
7835 | struct gcpro gcpro1, gcpro2; | |
7836 | struct frame *f; | |
6b5c4794 | 7837 | Lisp_Object tooltip_frame; |
5f5c8ee5 | 7838 | |
86ffe5cd | 7839 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7840 | tooltip_frame = tip_frame; |
7841 | #else | |
6b5c4794 | 7842 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
7843 | #endif |
7844 | ||
7845 | /* Update all frame titles based on their buffer names, etc. We do | |
7846 | this before the menu bars so that the buffer-menu will show the | |
7847 | up-to-date frame titles. */ | |
7848 | #ifdef HAVE_WINDOW_SYSTEM | |
7849 | if (windows_or_buffers_changed || update_mode_lines) | |
7850 | { | |
7851 | Lisp_Object tail, frame; | |
7852 | ||
7853 | FOR_EACH_FRAME (tail, frame) | |
7854 | { | |
7855 | f = XFRAME (frame); | |
6b5c4794 | 7856 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
7857 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
7858 | x_consider_frame_title (frame); | |
7859 | } | |
7860 | } | |
7861 | #endif /* HAVE_WINDOW_SYSTEM */ | |
7862 | ||
7863 | /* Update the menu bar item lists, if appropriate. This has to be | |
7864 | done before any actual redisplay or generation of display lines. */ | |
2311178e | 7865 | all_windows = (update_mode_lines |
5f5c8ee5 GM |
7866 | || buffer_shared > 1 |
7867 | || windows_or_buffers_changed); | |
7868 | if (all_windows) | |
7869 | { | |
7870 | Lisp_Object tail, frame; | |
331379bf | 7871 | int count = SPECPDL_INDEX (); |
5f5c8ee5 GM |
7872 | |
7873 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7874 | ||
7875 | FOR_EACH_FRAME (tail, frame) | |
7876 | { | |
7877 | f = XFRAME (frame); | |
7878 | ||
7879 | /* Ignore tooltip frame. */ | |
6b5c4794 | 7880 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 | 7881 | continue; |
2311178e | 7882 | |
5f5c8ee5 GM |
7883 | /* If a window on this frame changed size, report that to |
7884 | the user and clear the size-change flag. */ | |
7885 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
7886 | { | |
7887 | Lisp_Object functions; | |
2311178e | 7888 | |
5f5c8ee5 GM |
7889 | /* Clear flag first in case we get an error below. */ |
7890 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
7891 | functions = Vwindow_size_change_functions; | |
7892 | GCPRO2 (tail, functions); | |
2311178e | 7893 | |
5f5c8ee5 GM |
7894 | while (CONSP (functions)) |
7895 | { | |
7896 | call1 (XCAR (functions), frame); | |
7897 | functions = XCDR (functions); | |
7898 | } | |
7899 | UNGCPRO; | |
7900 | } | |
2311178e | 7901 | |
5f5c8ee5 GM |
7902 | GCPRO1 (tail); |
7903 | update_menu_bar (f, 0); | |
7904 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 7905 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
7906 | #endif |
7907 | UNGCPRO; | |
7908 | } | |
7909 | ||
7910 | unbind_to (count, Qnil); | |
7911 | } | |
7912 | else | |
7913 | { | |
886bd6f2 GM |
7914 | struct frame *sf = SELECTED_FRAME (); |
7915 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 7916 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 7917 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
7918 | #endif |
7919 | } | |
7920 | ||
7921 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
7922 | pending_menu_activation is not defined. */ | |
7923 | #ifdef USE_X_TOOLKIT | |
7924 | pending_menu_activation = 0; | |
7925 | #endif | |
7926 | } | |
7927 | ||
7928 | ||
7929 | /* Update the menu bar item list for frame F. This has to be done | |
7930 | before we start to fill in any display lines, because it can call | |
7931 | eval. | |
7932 | ||
7933 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
7934 | ||
7935 | static void | |
7936 | update_menu_bar (f, save_match_data) | |
7937 | struct frame *f; | |
7938 | int save_match_data; | |
7939 | { | |
7940 | Lisp_Object window; | |
7941 | register struct window *w; | |
7942 | ||
e1477f43 GM |
7943 | /* If called recursively during a menu update, do nothing. This can |
7944 | happen when, for instance, an activate-menubar-hook causes a | |
7945 | redisplay. */ | |
7946 | if (inhibit_menubar_update) | |
7947 | return; | |
7948 | ||
5f5c8ee5 GM |
7949 | window = FRAME_SELECTED_WINDOW (f); |
7950 | w = XWINDOW (window); | |
2311178e | 7951 | |
84f2e615 | 7952 | #if 0 /* The if statement below this if statement used to include the |
a5f08374 RS |
7953 | condition !NILP (w->update_mode_line), rather than using |
7954 | update_mode_lines directly, and this if statement may have | |
7955 | been added to make that condition work. Now the if | |
2311178e | 7956 | statement below matches its comment, this isn't needed. */ |
5f5c8ee5 GM |
7957 | if (update_mode_lines) |
7958 | w->update_mode_line = Qt; | |
a5f08374 | 7959 | #endif |
5f5c8ee5 GM |
7960 | |
7961 | if (FRAME_WINDOW_P (f) | |
7962 | ? | |
488dd4c4 JD |
7963 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
7964 | || defined (USE_GTK) | |
2311178e | 7965 | FRAME_EXTERNAL_MENU_BAR (f) |
5f5c8ee5 GM |
7966 | #else |
7967 | FRAME_MENU_BAR_LINES (f) > 0 | |
7968 | #endif | |
7969 | : FRAME_MENU_BAR_LINES (f) > 0) | |
7970 | { | |
7971 | /* If the user has switched buffers or windows, we need to | |
7972 | recompute to reflect the new bindings. But we'll | |
7973 | recompute when update_mode_lines is set too; that means | |
7974 | that people can use force-mode-line-update to request | |
7975 | that the menu bar be recomputed. The adverse effect on | |
7976 | the rest of the redisplay algorithm is about the same as | |
7977 | windows_or_buffers_changed anyway. */ | |
7978 | if (windows_or_buffers_changed | |
a5f08374 RS |
7979 | /* This used to test w->update_mode_line, but we believe |
7980 | there is no need to recompute the menu in that case. */ | |
7981 | || update_mode_lines | |
5f5c8ee5 GM |
7982 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
7983 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7984 | != !NILP (w->last_had_star)) | |
7985 | || ((!NILP (Vtransient_mark_mode) | |
7986 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7987 | != !NILP (w->region_showing))) | |
7988 | { | |
7989 | struct buffer *prev = current_buffer; | |
331379bf | 7990 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 7991 | |
e1477f43 GM |
7992 | specbind (Qinhibit_menubar_update, Qt); |
7993 | ||
5f5c8ee5 GM |
7994 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7995 | if (save_match_data) | |
7996 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7997 | if (NILP (Voverriding_local_map_menu_flag)) | |
7998 | { | |
7999 | specbind (Qoverriding_terminal_local_map, Qnil); | |
8000 | specbind (Qoverriding_local_map, Qnil); | |
8001 | } | |
8002 | ||
8003 | /* Run the Lucid hook. */ | |
65048e97 | 8004 | safe_run_hooks (Qactivate_menubar_hook); |
2311178e | 8005 | |
5f5c8ee5 GM |
8006 | /* If it has changed current-menubar from previous value, |
8007 | really recompute the menu-bar from the value. */ | |
8008 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
8009 | call0 (Qrecompute_lucid_menubar); | |
2311178e | 8010 | |
5f5c8ee5 GM |
8011 | safe_run_hooks (Qmenu_bar_update_hook); |
8012 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
2311178e | 8013 | |
5f5c8ee5 | 8014 | /* Redisplay the menu bar in case we changed it. */ |
488dd4c4 JD |
8015 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
8016 | || defined (USE_GTK) | |
1a578e9b | 8017 | if (FRAME_WINDOW_P (f) |
e0f712ba | 8018 | #if defined (MAC_OS) |
1a578e9b AC |
8019 | /* All frames on Mac OS share the same menubar. So only the |
8020 | selected frame should be allowed to set it. */ | |
8021 | && f == SELECTED_FRAME () | |
8022 | #endif | |
8023 | ) | |
5f5c8ee5 GM |
8024 | set_frame_menubar (f, 0, 0); |
8025 | else | |
8026 | /* On a terminal screen, the menu bar is an ordinary screen | |
8027 | line, and this makes it get updated. */ | |
8028 | w->update_mode_line = Qt; | |
488dd4c4 | 8029 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
8030 | /* In the non-toolkit version, the menu bar is an ordinary screen |
8031 | line, and this makes it get updated. */ | |
8032 | w->update_mode_line = Qt; | |
488dd4c4 | 8033 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
8034 | |
8035 | unbind_to (count, Qnil); | |
8036 | set_buffer_internal_1 (prev); | |
8037 | } | |
8038 | } | |
8039 | } | |
8040 | ||
8041 | ||
8042 | \f | |
fa3c6b4d KS |
8043 | /*********************************************************************** |
8044 | Output Cursor | |
8045 | ***********************************************************************/ | |
8046 | ||
1dabd0cf KS |
8047 | #ifdef HAVE_WINDOW_SYSTEM |
8048 | ||
fa3c6b4d KS |
8049 | /* EXPORT: |
8050 | Nominal cursor position -- where to draw output. | |
8051 | HPOS and VPOS are window relative glyph matrix coordinates. | |
8052 | X and Y are window relative pixel coordinates. */ | |
8053 | ||
8054 | struct cursor_pos output_cursor; | |
8055 | ||
8056 | ||
8057 | /* EXPORT: | |
8058 | Set the global variable output_cursor to CURSOR. All cursor | |
8059 | positions are relative to updated_window. */ | |
8060 | ||
8061 | void | |
8062 | set_output_cursor (cursor) | |
8063 | struct cursor_pos *cursor; | |
8064 | { | |
8065 | output_cursor.hpos = cursor->hpos; | |
8066 | output_cursor.vpos = cursor->vpos; | |
8067 | output_cursor.x = cursor->x; | |
8068 | output_cursor.y = cursor->y; | |
8069 | } | |
8070 | ||
8071 | ||
8072 | /* EXPORT for RIF: | |
8073 | Set a nominal cursor position. | |
8074 | ||
8075 | HPOS and VPOS are column/row positions in a window glyph matrix. X | |
8076 | and Y are window text area relative pixel positions. | |
8077 | ||
8078 | If this is done during an update, updated_window will contain the | |
8079 | window that is being updated and the position is the future output | |
8080 | cursor position for that window. If updated_window is null, use | |
8081 | selected_window and display the cursor at the given position. */ | |
8082 | ||
8083 | void | |
8084 | x_cursor_to (vpos, hpos, y, x) | |
8085 | int vpos, hpos, y, x; | |
8086 | { | |
8087 | struct window *w; | |
8088 | ||
8089 | /* If updated_window is not set, work on selected_window. */ | |
8090 | if (updated_window) | |
8091 | w = updated_window; | |
8092 | else | |
8093 | w = XWINDOW (selected_window); | |
8094 | ||
8095 | /* Set the output cursor. */ | |
8096 | output_cursor.hpos = hpos; | |
8097 | output_cursor.vpos = vpos; | |
8098 | output_cursor.x = x; | |
8099 | output_cursor.y = y; | |
8100 | ||
8101 | /* If not called as part of an update, really display the cursor. | |
8102 | This will also set the cursor position of W. */ | |
8103 | if (updated_window == NULL) | |
8104 | { | |
8105 | BLOCK_INPUT; | |
8106 | display_and_set_cursor (w, 1, hpos, vpos, x, y); | |
8107 | if (rif->flush_display_optional) | |
8108 | rif->flush_display_optional (SELECTED_FRAME ()); | |
8109 | UNBLOCK_INPUT; | |
8110 | } | |
8111 | } | |
8112 | ||
1dabd0cf | 8113 | #endif /* HAVE_WINDOW_SYSTEM */ |
fa3c6b4d KS |
8114 | |
8115 | \f | |
5f5c8ee5 | 8116 | /*********************************************************************** |
e037b9ec | 8117 | Tool-bars |
5f5c8ee5 GM |
8118 | ***********************************************************************/ |
8119 | ||
8120 | #ifdef HAVE_WINDOW_SYSTEM | |
8121 | ||
fa3c6b4d KS |
8122 | /* Where the mouse was last time we reported a mouse event. */ |
8123 | ||
8124 | FRAME_PTR last_mouse_frame; | |
8125 | ||
8126 | /* Tool-bar item index of the item on which a mouse button was pressed | |
8127 | or -1. */ | |
8128 | ||
8129 | int last_tool_bar_item; | |
8130 | ||
8131 | ||
e037b9ec | 8132 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
8133 | before we start to fill in any display lines. Called from |
8134 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
8135 | and restore it here. */ | |
8136 | ||
8137 | static void | |
e037b9ec | 8138 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
8139 | struct frame *f; |
8140 | int save_match_data; | |
8141 | { | |
488dd4c4 JD |
8142 | #ifdef USE_GTK |
8143 | int do_update = FRAME_EXTERNAL_TOOL_BAR(f); | |
8144 | #else | |
8145 | int do_update = WINDOWP (f->tool_bar_window) | |
da8b7f4f | 8146 | && WINDOW_TOTAL_LINES (XWINDOW (f->tool_bar_window)) > 0; |
488dd4c4 JD |
8147 | #endif |
8148 | ||
8149 | if (do_update) | |
5f5c8ee5 GM |
8150 | { |
8151 | Lisp_Object window; | |
8152 | struct window *w; | |
8153 | ||
8154 | window = FRAME_SELECTED_WINDOW (f); | |
8155 | w = XWINDOW (window); | |
2311178e | 8156 | |
5f5c8ee5 GM |
8157 | /* If the user has switched buffers or windows, we need to |
8158 | recompute to reflect the new bindings. But we'll | |
8159 | recompute when update_mode_lines is set too; that means | |
8160 | that people can use force-mode-line-update to request | |
8161 | that the menu bar be recomputed. The adverse effect on | |
8162 | the rest of the redisplay algorithm is about the same as | |
8163 | windows_or_buffers_changed anyway. */ | |
8164 | if (windows_or_buffers_changed | |
8165 | || !NILP (w->update_mode_line) | |
84f2e615 | 8166 | || update_mode_lines |
5f5c8ee5 GM |
8167 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
8168 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
8169 | != !NILP (w->last_had_star)) | |
8170 | || ((!NILP (Vtransient_mark_mode) | |
8171 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
8172 | != !NILP (w->region_showing))) | |
8173 | { | |
8174 | struct buffer *prev = current_buffer; | |
331379bf | 8175 | int count = SPECPDL_INDEX (); |
84f2e615 RS |
8176 | Lisp_Object old_tool_bar; |
8177 | struct gcpro gcpro1; | |
a2889657 | 8178 | |
5f5c8ee5 GM |
8179 | /* Set current_buffer to the buffer of the selected |
8180 | window of the frame, so that we get the right local | |
8181 | keymaps. */ | |
8182 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 8183 | |
5f5c8ee5 GM |
8184 | /* Save match data, if we must. */ |
8185 | if (save_match_data) | |
8186 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
8187 | ||
8188 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
8189 | if (NILP (Voverriding_local_map_menu_flag)) | |
8190 | { | |
8191 | specbind (Qoverriding_terminal_local_map, Qnil); | |
8192 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 8193 | } |
1f40cad2 | 8194 | |
84f2e615 RS |
8195 | old_tool_bar = f->tool_bar_items; |
8196 | GCPRO1 (old_tool_bar); | |
8197 | ||
e037b9ec | 8198 | /* Build desired tool-bar items from keymaps. */ |
e3b2c21f | 8199 | BLOCK_INPUT; |
7464726e GM |
8200 | f->tool_bar_items |
8201 | = tool_bar_items (f->tool_bar_items, &f->n_tool_bar_items); | |
e3b2c21f | 8202 | UNBLOCK_INPUT; |
2311178e | 8203 | |
84f2e615 RS |
8204 | /* Redisplay the tool-bar if we changed it. */ |
8205 | if (! NILP (Fequal (old_tool_bar, f->tool_bar_items))) | |
8206 | w->update_mode_line = Qt; | |
1e802fb5 SM |
8207 | |
8208 | UNGCPRO; | |
5f5c8ee5 GM |
8209 | |
8210 | unbind_to (count, Qnil); | |
8211 | set_buffer_internal_1 (prev); | |
81d478f3 | 8212 | } |
a2889657 JB |
8213 | } |
8214 | } | |
8215 | ||
6c4429a5 | 8216 | |
e037b9ec | 8217 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 8218 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
8219 | been set up previously by calling prepare_menu_bars. */ |
8220 | ||
a2889657 | 8221 | static void |
e037b9ec | 8222 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 8223 | struct frame *f; |
a2889657 | 8224 | { |
a23887b9 | 8225 | int i, size, size_needed; |
5f5c8ee5 GM |
8226 | struct gcpro gcpro1, gcpro2, gcpro3; |
8227 | Lisp_Object image, plist, props; | |
a2889657 | 8228 | |
5f5c8ee5 GM |
8229 | image = plist = props = Qnil; |
8230 | GCPRO3 (image, plist, props); | |
a2889657 | 8231 | |
e037b9ec | 8232 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 | 8233 | Otherwise, make a new string. */ |
2311178e | 8234 | |
5f5c8ee5 | 8235 | /* The size of the string we might be able to reuse. */ |
e037b9ec | 8236 | size = (STRINGP (f->desired_tool_bar_string) |
2051c264 | 8237 | ? SCHARS (f->desired_tool_bar_string) |
5f5c8ee5 GM |
8238 | : 0); |
8239 | ||
b94c0d9c | 8240 | /* We need one space in the string for each image. */ |
a23887b9 | 8241 | size_needed = f->n_tool_bar_items; |
2311178e | 8242 | |
b94c0d9c | 8243 | /* Reuse f->desired_tool_bar_string, if possible. */ |
cb2ddc53 | 8244 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
8245 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
8246 | make_number (' ')); | |
5f5c8ee5 GM |
8247 | else |
8248 | { | |
8249 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
8250 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 8251 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 8252 | } |
a2889657 | 8253 | |
5f5c8ee5 | 8254 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
8255 | put a `menu_item' property on tool-bar items with a value that |
8256 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 8257 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 8258 | { |
7464726e | 8259 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 8260 | |
e037b9ec GM |
8261 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
8262 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 8263 | int hmargin, vmargin, relief, idx, end; |
ecd01a0e | 8264 | extern Lisp_Object QCrelief, QCmargin, QCconversion, Qimage; |
5f5c8ee5 GM |
8265 | |
8266 | /* If image is a vector, choose the image according to the | |
8267 | button state. */ | |
e037b9ec | 8268 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
8269 | if (VECTORP (image)) |
8270 | { | |
5f5c8ee5 GM |
8271 | if (enabled_p) |
8272 | idx = (selected_p | |
e037b9ec GM |
8273 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
8274 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
8275 | else |
8276 | idx = (selected_p | |
e037b9ec GM |
8277 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
8278 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
2311178e | 8279 | |
37e4e482 GM |
8280 | xassert (ASIZE (image) >= idx); |
8281 | image = AREF (image, idx); | |
5f5c8ee5 | 8282 | } |
37e4e482 GM |
8283 | else |
8284 | idx = -1; | |
5f5c8ee5 GM |
8285 | |
8286 | /* Ignore invalid image specifications. */ | |
8287 | if (!valid_image_p (image)) | |
8288 | continue; | |
8289 | ||
e037b9ec | 8290 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
8291 | plist = Fcopy_sequence (XCDR (image)); |
8292 | ||
8293 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 8294 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
8295 | ? tool_bar_button_relief |
8296 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
8297 | hmargin = vmargin = relief; |
8298 | ||
8299 | if (INTEGERP (Vtool_bar_button_margin) | |
8300 | && XINT (Vtool_bar_button_margin) > 0) | |
8301 | { | |
8302 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
8303 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
8304 | } | |
8305 | else if (CONSP (Vtool_bar_button_margin)) | |
8306 | { | |
8307 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
8308 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
8309 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
2311178e | 8310 | |
35a41507 GM |
8311 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) |
8312 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
8313 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
8314 | } | |
2311178e | 8315 | |
e037b9ec | 8316 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
8317 | { |
8318 | /* Add a `:relief' property to the image spec if the item is | |
8319 | selected. */ | |
8320 | if (selected_p) | |
8321 | { | |
8322 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
8323 | hmargin -= relief; |
8324 | vmargin -= relief; | |
5f5c8ee5 GM |
8325 | } |
8326 | } | |
8327 | else | |
8328 | { | |
8329 | /* If image is selected, display it pressed, i.e. with a | |
8330 | negative relief. If it's not selected, display it with a | |
8331 | raised relief. */ | |
8332 | plist = Fplist_put (plist, QCrelief, | |
8333 | (selected_p | |
8334 | ? make_number (-relief) | |
8335 | : make_number (relief))); | |
35a41507 GM |
8336 | hmargin -= relief; |
8337 | vmargin -= relief; | |
5f5c8ee5 GM |
8338 | } |
8339 | ||
8340 | /* Put a margin around the image. */ | |
35a41507 GM |
8341 | if (hmargin || vmargin) |
8342 | { | |
8343 | if (hmargin == vmargin) | |
8344 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
8345 | else | |
8346 | plist = Fplist_put (plist, QCmargin, | |
8347 | Fcons (make_number (hmargin), | |
8348 | make_number (vmargin))); | |
8349 | } | |
2311178e | 8350 | |
37e4e482 GM |
8351 | /* If button is not enabled, and we don't have special images |
8352 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 8353 | applying an appropriate algorithm to it. */ |
37e4e482 | 8354 | if (!enabled_p && idx < 0) |
ecd01a0e | 8355 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
2311178e | 8356 | |
5f5c8ee5 GM |
8357 | /* Put a `display' text property on the string for the image to |
8358 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 8359 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
8360 | vector. */ |
8361 | image = Fcons (Qimage, plist); | |
8362 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
8363 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
8364 | ||
8365 | /* Let the last image hide all remaining spaces in the tool bar | |
8366 | string. The string can be longer than needed when we reuse a | |
8367 | previous string. */ | |
8368 | if (i + 1 == f->n_tool_bar_items) | |
2051c264 | 8369 | end = SCHARS (f->desired_tool_bar_string); |
a23887b9 GM |
8370 | else |
8371 | end = i + 1; | |
8372 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 8373 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 8374 | #undef PROP |
a2889657 JB |
8375 | } |
8376 | ||
5f5c8ee5 GM |
8377 | UNGCPRO; |
8378 | } | |
8379 | ||
8380 | ||
e037b9ec | 8381 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
8382 | |
8383 | static void | |
e037b9ec | 8384 | display_tool_bar_line (it) |
5f5c8ee5 GM |
8385 | struct it *it; |
8386 | { | |
8387 | struct glyph_row *row = it->glyph_row; | |
8388 | int max_x = it->last_visible_x; | |
8389 | struct glyph *last; | |
2311178e | 8390 | |
5f5c8ee5 GM |
8391 | prepare_desired_row (row); |
8392 | row->y = it->current_y; | |
90aa2856 GM |
8393 | |
8394 | /* Note that this isn't made use of if the face hasn't a box, | |
8395 | so there's no need to check the face here. */ | |
8396 | it->start_of_box_run_p = 1; | |
2311178e | 8397 | |
5f5c8ee5 | 8398 | while (it->current_x < max_x) |
a2889657 | 8399 | { |
5f5c8ee5 | 8400 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 8401 | |
5f5c8ee5 GM |
8402 | /* Get the next display element. */ |
8403 | if (!get_next_display_element (it)) | |
8404 | break; | |
73af359d | 8405 | |
5f5c8ee5 GM |
8406 | /* Produce glyphs. */ |
8407 | x_before = it->current_x; | |
8408 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
8409 | PRODUCE_GLYPHS (it); | |
daa37602 | 8410 | |
5f5c8ee5 GM |
8411 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
8412 | i = 0; | |
8413 | x = x_before; | |
8414 | while (i < nglyphs) | |
8415 | { | |
8416 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
2311178e | 8417 | |
5f5c8ee5 GM |
8418 | if (x + glyph->pixel_width > max_x) |
8419 | { | |
8420 | /* Glyph doesn't fit on line. */ | |
8421 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
8422 | it->current_x = x; | |
8423 | goto out; | |
8424 | } | |
daa37602 | 8425 | |
5f5c8ee5 GM |
8426 | ++it->hpos; |
8427 | x += glyph->pixel_width; | |
8428 | ++i; | |
8429 | } | |
8430 | ||
8431 | /* Stop at line ends. */ | |
8432 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
8433 | break; | |
8434 | ||
cafafe0b | 8435 | set_iterator_to_next (it, 1); |
a2889657 | 8436 | } |
a2889657 | 8437 | |
5f5c8ee5 | 8438 | out:; |
a2889657 | 8439 | |
5f5c8ee5 GM |
8440 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
8441 | extend_face_to_end_of_line (it); | |
8442 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
8443 | last->right_box_line_p = 1; | |
90aa2856 GM |
8444 | if (last == row->glyphs[TEXT_AREA]) |
8445 | last->left_box_line_p = 1; | |
5f5c8ee5 | 8446 | compute_line_metrics (it); |
2311178e | 8447 | |
e037b9ec | 8448 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
8449 | if (!row->displays_text_p) |
8450 | { | |
312246d1 GM |
8451 | row->height = row->phys_height = it->last_visible_y - row->y; |
8452 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 | 8453 | } |
2311178e | 8454 | |
5f5c8ee5 GM |
8455 | row->full_width_p = 1; |
8456 | row->continued_p = 0; | |
8457 | row->truncated_on_left_p = 0; | |
8458 | row->truncated_on_right_p = 0; | |
8459 | ||
8460 | it->current_x = it->hpos = 0; | |
8461 | it->current_y += row->height; | |
8462 | ++it->vpos; | |
8463 | ++it->glyph_row; | |
a2889657 | 8464 | } |
96a410bc | 8465 | |
5f5c8ee5 | 8466 | |
e037b9ec | 8467 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 8468 | items of frame F visible. */ |
96a410bc | 8469 | |
d39b6696 | 8470 | static int |
e037b9ec | 8471 | tool_bar_lines_needed (f) |
5f5c8ee5 | 8472 | struct frame *f; |
d39b6696 | 8473 | { |
e037b9ec | 8474 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 8475 | struct it it; |
2311178e | 8476 | |
e037b9ec GM |
8477 | /* Initialize an iterator for iteration over |
8478 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
8479 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 | 8480 | it.first_visible_x = 0; |
da8b7f4f | 8481 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
e037b9ec | 8482 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
8483 | |
8484 | while (!ITERATOR_AT_END_P (&it)) | |
8485 | { | |
8486 | it.glyph_row = w->desired_matrix->rows; | |
8487 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 8488 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
8489 | } |
8490 | ||
da8b7f4f | 8491 | return (it.current_y + FRAME_LINE_HEIGHT (f) - 1) / FRAME_LINE_HEIGHT (f); |
d39b6696 | 8492 | } |
96a410bc | 8493 | |
5f5c8ee5 | 8494 | |
57c28064 GM |
8495 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
8496 | 0, 1, 0, | |
7ee72033 MB |
8497 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
8498 | (frame) | |
57c28064 GM |
8499 | Lisp_Object frame; |
8500 | { | |
8501 | struct frame *f; | |
8502 | struct window *w; | |
8503 | int nlines = 0; | |
8504 | ||
8505 | if (NILP (frame)) | |
8506 | frame = selected_frame; | |
8507 | else | |
b7826503 | 8508 | CHECK_FRAME (frame); |
57c28064 | 8509 | f = XFRAME (frame); |
2311178e | 8510 | |
57c28064 GM |
8511 | if (WINDOWP (f->tool_bar_window) |
8512 | || (w = XWINDOW (f->tool_bar_window), | |
da8b7f4f | 8513 | WINDOW_TOTAL_LINES (w) > 0)) |
57c28064 GM |
8514 | { |
8515 | update_tool_bar (f, 1); | |
8516 | if (f->n_tool_bar_items) | |
8517 | { | |
8518 | build_desired_tool_bar_string (f); | |
8519 | nlines = tool_bar_lines_needed (f); | |
8520 | } | |
8521 | } | |
8522 | ||
8523 | return make_number (nlines); | |
8524 | } | |
8525 | ||
8526 | ||
e037b9ec | 8527 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
8528 | height should be changed. */ |
8529 | ||
8530 | static int | |
e037b9ec | 8531 | redisplay_tool_bar (f) |
5f5c8ee5 | 8532 | struct frame *f; |
96a410bc | 8533 | { |
5f5c8ee5 GM |
8534 | struct window *w; |
8535 | struct it it; | |
8536 | struct glyph_row *row; | |
8537 | int change_height_p = 0; | |
177c0ea7 | 8538 | |
488dd4c4 JD |
8539 | #ifdef USE_GTK |
8540 | if (FRAME_EXTERNAL_TOOL_BAR(f)) | |
8541 | update_frame_tool_bar (f); | |
8542 | return 0; | |
8543 | #endif | |
2311178e | 8544 | |
e037b9ec GM |
8545 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
8546 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 8547 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
8548 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
8549 | if (!WINDOWP (f->tool_bar_window) | |
8550 | || (w = XWINDOW (f->tool_bar_window), | |
da8b7f4f | 8551 | WINDOW_TOTAL_LINES (w) == 0)) |
5f5c8ee5 | 8552 | return 0; |
96a410bc | 8553 | |
e037b9ec GM |
8554 | /* Set up an iterator for the tool-bar window. */ |
8555 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 | 8556 | it.first_visible_x = 0; |
da8b7f4f | 8557 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
5f5c8ee5 | 8558 | row = it.glyph_row; |
3450d04c | 8559 | |
e037b9ec GM |
8560 | /* Build a string that represents the contents of the tool-bar. */ |
8561 | build_desired_tool_bar_string (f); | |
8562 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 8563 | |
e037b9ec | 8564 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 8565 | while (it.current_y < it.last_visible_y) |
e037b9ec | 8566 | display_tool_bar_line (&it); |
3450d04c | 8567 | |
e037b9ec | 8568 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
8569 | window, so don't do it. */ |
8570 | w->desired_matrix->no_scrolling_p = 1; | |
8571 | w->must_be_updated_p = 1; | |
3450d04c | 8572 | |
e037b9ec | 8573 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
8574 | { |
8575 | int nlines; | |
6e33e6f0 GM |
8576 | |
8577 | /* If we couldn't display everything, change the tool-bar's | |
8578 | height. */ | |
8579 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
8580 | change_height_p = 1; | |
2311178e | 8581 | |
5f5c8ee5 GM |
8582 | /* If there are blank lines at the end, except for a partially |
8583 | visible blank line at the end that is smaller than | |
da8b7f4f | 8584 | FRAME_LINE_HEIGHT, change the tool-bar's height. */ |
5f5c8ee5 GM |
8585 | row = it.glyph_row - 1; |
8586 | if (!row->displays_text_p | |
da8b7f4f | 8587 | && row->height >= FRAME_LINE_HEIGHT (f)) |
5f5c8ee5 GM |
8588 | change_height_p = 1; |
8589 | ||
e037b9ec GM |
8590 | /* If row displays tool-bar items, but is partially visible, |
8591 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
8592 | if (row->displays_text_p |
8593 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
8594 | change_height_p = 1; | |
8595 | ||
e037b9ec | 8596 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
8597 | frame parameter. */ |
8598 | if (change_height_p | |
e037b9ec | 8599 | && (nlines = tool_bar_lines_needed (f), |
da8b7f4f | 8600 | nlines != WINDOW_TOTAL_LINES (w))) |
5f5c8ee5 | 8601 | { |
e037b9ec | 8602 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 8603 | Lisp_Object frame; |
da8b7f4f | 8604 | int old_height = WINDOW_TOTAL_LINES (w); |
2311178e | 8605 | |
5f5c8ee5 GM |
8606 | XSETFRAME (frame, f); |
8607 | clear_glyph_matrix (w->desired_matrix); | |
8608 | Fmodify_frame_parameters (frame, | |
e037b9ec | 8609 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
8610 | make_number (nlines)), |
8611 | Qnil)); | |
da8b7f4f | 8612 | if (WINDOW_TOTAL_LINES (w) != old_height) |
e85ee976 | 8613 | fonts_changed_p = 1; |
5f5c8ee5 GM |
8614 | } |
8615 | } | |
3450d04c | 8616 | |
5f5c8ee5 | 8617 | return change_height_p; |
96a410bc | 8618 | } |
90adcf20 | 8619 | |
5f5c8ee5 | 8620 | |
e037b9ec GM |
8621 | /* Get information about the tool-bar item which is displayed in GLYPH |
8622 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 8623 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 8624 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 | 8625 | |
fa3c6b4d | 8626 | static int |
e037b9ec | 8627 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
8628 | struct frame *f; |
8629 | struct glyph *glyph; | |
8630 | int *prop_idx; | |
90adcf20 | 8631 | { |
5f5c8ee5 GM |
8632 | Lisp_Object prop; |
8633 | int success_p; | |
be676094 GM |
8634 | int charpos; |
8635 | ||
8636 | /* This function can be called asynchronously, which means we must | |
8637 | exclude any possibility that Fget_text_property signals an | |
8638 | error. */ | |
2051c264 | 8639 | charpos = min (SCHARS (f->current_tool_bar_string), glyph->charpos); |
be676094 | 8640 | charpos = max (0, charpos); |
2311178e | 8641 | |
5f5c8ee5 GM |
8642 | /* Get the text property `menu-item' at pos. The value of that |
8643 | property is the start index of this item's properties in | |
7464726e | 8644 | F->tool_bar_items. */ |
be676094 | 8645 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 8646 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
8647 | if (INTEGERP (prop)) |
8648 | { | |
8649 | *prop_idx = XINT (prop); | |
8650 | success_p = 1; | |
8651 | } | |
8652 | else | |
8653 | success_p = 0; | |
90adcf20 | 8654 | |
5f5c8ee5 GM |
8655 | return success_p; |
8656 | } | |
2311178e | 8657 | |
fa3c6b4d KS |
8658 | \f |
8659 | /* Get information about the tool-bar item at position X/Y on frame F. | |
8660 | Return in *GLYPH a pointer to the glyph of the tool-bar item in | |
8661 | the current matrix of the tool-bar window of F, or NULL if not | |
8662 | on a tool-bar item. Return in *PROP_IDX the index of the tool-bar | |
8663 | item in F->tool_bar_items. Value is | |
8664 | ||
8665 | -1 if X/Y is not on a tool-bar item | |
8666 | 0 if X/Y is on the same item that was highlighted before. | |
8667 | 1 otherwise. */ | |
8668 | ||
8669 | static int | |
8670 | get_tool_bar_item (f, x, y, glyph, hpos, vpos, prop_idx) | |
8671 | struct frame *f; | |
8672 | int x, y; | |
8673 | struct glyph **glyph; | |
8674 | int *hpos, *vpos, *prop_idx; | |
8675 | { | |
8676 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
8677 | struct window *w = XWINDOW (f->tool_bar_window); | |
8678 | int area; | |
8679 | ||
8680 | /* Find the glyph under X/Y. */ | |
8681 | *glyph = x_y_to_hpos_vpos (w, x, y, hpos, vpos, &area, 0); | |
8682 | if (*glyph == NULL) | |
8683 | return -1; | |
8684 | ||
8685 | /* Get the start of this tool-bar item's properties in | |
8686 | f->tool_bar_items. */ | |
8687 | if (!tool_bar_item_info (f, *glyph, prop_idx)) | |
8688 | return -1; | |
8689 | ||
8690 | /* Is mouse on the highlighted item? */ | |
8691 | if (EQ (f->tool_bar_window, dpyinfo->mouse_face_window) | |
8692 | && *vpos >= dpyinfo->mouse_face_beg_row | |
8693 | && *vpos <= dpyinfo->mouse_face_end_row | |
8694 | && (*vpos > dpyinfo->mouse_face_beg_row | |
8695 | || *hpos >= dpyinfo->mouse_face_beg_col) | |
8696 | && (*vpos < dpyinfo->mouse_face_end_row | |
8697 | || *hpos < dpyinfo->mouse_face_end_col | |
8698 | || dpyinfo->mouse_face_past_end)) | |
8699 | return 0; | |
8700 | ||
8701 | return 1; | |
8702 | } | |
8703 | ||
8704 | ||
8705 | /* EXPORT: | |
8706 | Handle mouse button event on the tool-bar of frame F, at | |
8707 | frame-relative coordinates X/Y. DOWN_P is 1 for a button press, | |
8708 | 0 for button release. MODIFIERS is event modifiers for button | |
8709 | release. */ | |
8710 | ||
8711 | void | |
8712 | handle_tool_bar_click (f, x, y, down_p, modifiers) | |
8713 | struct frame *f; | |
8714 | int x, y, down_p; | |
8715 | unsigned int modifiers; | |
8716 | { | |
8717 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
8718 | struct window *w = XWINDOW (f->tool_bar_window); | |
8719 | int hpos, vpos, prop_idx; | |
8720 | struct glyph *glyph; | |
8721 | Lisp_Object enabled_p; | |
8722 | ||
8723 | /* If not on the highlighted tool-bar item, return. */ | |
8724 | frame_to_window_pixel_xy (w, &x, &y); | |
8725 | if (get_tool_bar_item (f, x, y, &glyph, &hpos, &vpos, &prop_idx) != 0) | |
8726 | return; | |
8727 | ||
8728 | /* If item is disabled, do nothing. */ | |
8729 | enabled_p = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_ENABLED_P); | |
8730 | if (NILP (enabled_p)) | |
8731 | return; | |
8732 | ||
8733 | if (down_p) | |
8734 | { | |
8735 | /* Show item in pressed state. */ | |
8736 | show_mouse_face (dpyinfo, DRAW_IMAGE_SUNKEN); | |
8737 | dpyinfo->mouse_face_image_state = DRAW_IMAGE_SUNKEN; | |
8738 | last_tool_bar_item = prop_idx; | |
8739 | } | |
8740 | else | |
8741 | { | |
8742 | Lisp_Object key, frame; | |
8743 | struct input_event event; | |
d86705ec | 8744 | EVENT_INIT (event); |
fa3c6b4d KS |
8745 | |
8746 | /* Show item in released state. */ | |
8747 | show_mouse_face (dpyinfo, DRAW_IMAGE_RAISED); | |
8748 | dpyinfo->mouse_face_image_state = DRAW_IMAGE_RAISED; | |
8749 | ||
8750 | key = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_KEY); | |
8751 | ||
8752 | XSETFRAME (frame, f); | |
8753 | event.kind = TOOL_BAR_EVENT; | |
8754 | event.frame_or_window = frame; | |
8755 | event.arg = frame; | |
8756 | kbd_buffer_store_event (&event); | |
8757 | ||
8758 | event.kind = TOOL_BAR_EVENT; | |
8759 | event.frame_or_window = frame; | |
8760 | event.arg = key; | |
8761 | event.modifiers = modifiers; | |
8762 | kbd_buffer_store_event (&event); | |
8763 | last_tool_bar_item = -1; | |
8764 | } | |
8765 | } | |
8766 | ||
8767 | ||
8768 | /* Possibly highlight a tool-bar item on frame F when mouse moves to | |
8769 | tool-bar window-relative coordinates X/Y. Called from | |
8770 | note_mouse_highlight. */ | |
8771 | ||
8772 | static void | |
8773 | note_tool_bar_highlight (f, x, y) | |
8774 | struct frame *f; | |
8775 | int x, y; | |
8776 | { | |
8777 | Lisp_Object window = f->tool_bar_window; | |
8778 | struct window *w = XWINDOW (window); | |
8779 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
8780 | int hpos, vpos; | |
8781 | struct glyph *glyph; | |
8782 | struct glyph_row *row; | |
8783 | int i; | |
8784 | Lisp_Object enabled_p; | |
8785 | int prop_idx; | |
8786 | enum draw_glyphs_face draw = DRAW_IMAGE_RAISED; | |
8787 | int mouse_down_p, rc; | |
8788 | ||
8789 | /* Function note_mouse_highlight is called with negative x(y | |
8790 | values when mouse moves outside of the frame. */ | |
8791 | if (x <= 0 || y <= 0) | |
8792 | { | |
8793 | clear_mouse_face (dpyinfo); | |
8794 | return; | |
8795 | } | |
8796 | ||
8797 | rc = get_tool_bar_item (f, x, y, &glyph, &hpos, &vpos, &prop_idx); | |
8798 | if (rc < 0) | |
8799 | { | |
8800 | /* Not on tool-bar item. */ | |
8801 | clear_mouse_face (dpyinfo); | |
8802 | return; | |
8803 | } | |
8804 | else if (rc == 0) | |
8805 | /* On same tool-bar item as before. */ | |
8806 | goto set_help_echo; | |
8807 | ||
8808 | clear_mouse_face (dpyinfo); | |
8809 | ||
8810 | /* Mouse is down, but on different tool-bar item? */ | |
8811 | mouse_down_p = (dpyinfo->grabbed | |
8812 | && f == last_mouse_frame | |
8813 | && FRAME_LIVE_P (f)); | |
8814 | if (mouse_down_p | |
8815 | && last_tool_bar_item != prop_idx) | |
8816 | return; | |
8817 | ||
8818 | dpyinfo->mouse_face_image_state = DRAW_NORMAL_TEXT; | |
8819 | draw = mouse_down_p ? DRAW_IMAGE_SUNKEN : DRAW_IMAGE_RAISED; | |
8820 | ||
8821 | /* If tool-bar item is not enabled, don't highlight it. */ | |
8822 | enabled_p = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_ENABLED_P); | |
8823 | if (!NILP (enabled_p)) | |
8824 | { | |
8825 | /* Compute the x-position of the glyph. In front and past the | |
da8b7f4f | 8826 | image is a space. We include this in the highlighted area. */ |
fa3c6b4d KS |
8827 | row = MATRIX_ROW (w->current_matrix, vpos); |
8828 | for (i = x = 0; i < hpos; ++i) | |
8829 | x += row->glyphs[TEXT_AREA][i].pixel_width; | |
8830 | ||
8831 | /* Record this as the current active region. */ | |
8832 | dpyinfo->mouse_face_beg_col = hpos; | |
8833 | dpyinfo->mouse_face_beg_row = vpos; | |
8834 | dpyinfo->mouse_face_beg_x = x; | |
8835 | dpyinfo->mouse_face_beg_y = row->y; | |
8836 | dpyinfo->mouse_face_past_end = 0; | |
8837 | ||
8838 | dpyinfo->mouse_face_end_col = hpos + 1; | |
8839 | dpyinfo->mouse_face_end_row = vpos; | |
8840 | dpyinfo->mouse_face_end_x = x + glyph->pixel_width; | |
8841 | dpyinfo->mouse_face_end_y = row->y; | |
8842 | dpyinfo->mouse_face_window = window; | |
8843 | dpyinfo->mouse_face_face_id = TOOL_BAR_FACE_ID; | |
8844 | ||
8845 | /* Display it as active. */ | |
8846 | show_mouse_face (dpyinfo, draw); | |
8847 | dpyinfo->mouse_face_image_state = draw; | |
8848 | } | |
8849 | ||
8850 | set_help_echo: | |
8851 | ||
8852 | /* Set help_echo_string to a help string to display for this tool-bar item. | |
8853 | XTread_socket does the rest. */ | |
8854 | help_echo_object = help_echo_window = Qnil; | |
8855 | help_echo_pos = -1; | |
8856 | help_echo_string = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_HELP); | |
8857 | if (NILP (help_echo_string)) | |
8858 | help_echo_string = AREF (f->tool_bar_items, prop_idx + TOOL_BAR_ITEM_CAPTION); | |
8859 | } | |
8860 | ||
5f5c8ee5 | 8861 | #endif /* HAVE_WINDOW_SYSTEM */ |
ffbbc941 KS |
8862 | |
8863 | ||
8864 | \f | |
8865 | /*********************************************************************** | |
8866 | Fringes | |
8867 | ***********************************************************************/ | |
8868 | ||
8869 | #ifdef HAVE_WINDOW_SYSTEM | |
8870 | ||
8871 | /* An arrow like this: `<-'. */ | |
8872 | static unsigned char left_bits[] = { | |
8873 | 0x18, 0x0c, 0x06, 0x3f, 0x3f, 0x06, 0x0c, 0x18}; | |
8874 | ||
8875 | /* Right truncation arrow bitmap `->'. */ | |
8876 | static unsigned char right_bits[] = { | |
8877 | 0x18, 0x30, 0x60, 0xfc, 0xfc, 0x60, 0x30, 0x18}; | |
8878 | ||
8879 | /* Marker for continued lines. */ | |
8880 | static unsigned char continued_bits[] = { | |
8881 | 0x3c, 0x7c, 0xc0, 0xe4, 0xfc, 0x7c, 0x3c, 0x7c}; | |
8882 | ||
8883 | /* Marker for continuation lines. */ | |
8884 | static unsigned char continuation_bits[] = { | |
8885 | 0x3c, 0x3e, 0x03, 0x27, 0x3f, 0x3e, 0x3c, 0x3e}; | |
8886 | ||
8887 | /* Overlay arrow bitmap. A triangular arrow. */ | |
8888 | static unsigned char ov_bits[] = { | |
8889 | 0x03, 0x0f, 0x1f, 0x3f, 0x3f, 0x1f, 0x0f, 0x03}; | |
8890 | ||
8891 | /* Bitmap drawn to indicate lines not displaying text if | |
8892 | `indicate-empty-lines' is non-nil. */ | |
8893 | static unsigned char zv_bits[] = { | |
8894 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8895 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8896 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8897 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8898 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8899 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8900 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8901 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00}; | |
8902 | ||
8903 | struct fringe_bitmap fringe_bitmaps[MAX_FRINGE_BITMAPS] = | |
8904 | { | |
8905 | { 0, 0, 0, NULL /* NO_FRINGE_BITMAP */ }, | |
8906 | { 8, sizeof (left_bits), 0, left_bits }, | |
8907 | { 8, sizeof (right_bits), 0, right_bits }, | |
8908 | { 8, sizeof (continued_bits), 0, continued_bits }, | |
8909 | { 8, sizeof (continuation_bits), 0, continuation_bits }, | |
8910 | { 8, sizeof (ov_bits), 0, ov_bits }, | |
8911 | { 8, sizeof (zv_bits), 3, zv_bits } | |
8912 | }; | |
8913 | ||
8914 | ||
8915 | /* Draw the bitmap WHICH in one of the left or right fringes of | |
8916 | window W. ROW is the glyph row for which to display the bitmap; it | |
8917 | determines the vertical position at which the bitmap has to be | |
8918 | drawn. */ | |
8919 | ||
8920 | static void | |
8921 | draw_fringe_bitmap (w, row, which, left_p) | |
8922 | struct window *w; | |
8923 | struct glyph_row *row; | |
8924 | enum fringe_bitmap_type which; | |
8925 | int left_p; | |
8926 | { | |
8927 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
8928 | struct draw_fringe_bitmap_params p; | |
8929 | ||
8930 | /* Convert row to frame coordinates. */ | |
8931 | p.y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y); | |
8932 | ||
8933 | p.which = which; | |
8934 | p.wd = fringe_bitmaps[which].width; | |
8935 | ||
8936 | p.h = fringe_bitmaps[which].height; | |
8937 | p.dh = (fringe_bitmaps[which].period | |
8938 | ? (p.y % fringe_bitmaps[which].period) | |
8939 | : 0); | |
8940 | p.h -= p.dh; | |
8941 | /* Clip bitmap if too high. */ | |
8942 | if (p.h > row->height) | |
8943 | p.h = row->height; | |
8944 | ||
8945 | p.face = FACE_FROM_ID (f, FRINGE_FACE_ID); | |
8946 | PREPARE_FACE_FOR_DISPLAY (f, p.face); | |
8947 | ||
8948 | /* Clear left fringe if no bitmap to draw or if bitmap doesn't fill | |
8949 | the fringe. */ | |
8950 | p.bx = -1; | |
8951 | if (left_p) | |
8952 | { | |
da8b7f4f KS |
8953 | int wd = WINDOW_LEFT_FRINGE_WIDTH (w); |
8954 | int x = window_box_left (w, (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
8955 | ? LEFT_MARGIN_AREA | |
8956 | : TEXT_AREA)); | |
8957 | if (p.wd > wd) | |
8958 | p.wd = wd; | |
8959 | p.x = x - p.wd - (wd - p.wd) / 2; | |
8960 | ||
8961 | if (p.wd < wd || row->height > p.h) | |
ffbbc941 KS |
8962 | { |
8963 | /* If W has a vertical border to its left, don't draw over it. */ | |
da8b7f4f KS |
8964 | wd -= ((!WINDOW_LEFTMOST_P (w) |
8965 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w)) | |
8966 | ? 1 : 0); | |
8967 | p.bx = x - wd; | |
8968 | p.nx = wd; | |
ffbbc941 KS |
8969 | } |
8970 | } | |
8971 | else | |
8972 | { | |
da8b7f4f KS |
8973 | int x = window_box_right (w, |
8974 | (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) | |
8975 | ? RIGHT_MARGIN_AREA | |
8976 | : TEXT_AREA)); | |
8977 | int wd = WINDOW_RIGHT_FRINGE_WIDTH (w); | |
8978 | if (p.wd > wd) | |
8979 | p.wd = wd; | |
8980 | p.x = x + (wd - p.wd) / 2; | |
ffbbc941 KS |
8981 | /* Clear right fringe if no bitmap to draw of if bitmap doesn't fill |
8982 | the fringe. */ | |
da8b7f4f | 8983 | if (p.wd < wd || row->height > p.h) |
ffbbc941 | 8984 | { |
da8b7f4f KS |
8985 | p.bx = x; |
8986 | p.nx = wd; | |
ffbbc941 KS |
8987 | } |
8988 | } | |
8989 | ||
8990 | if (p.bx >= 0) | |
8991 | { | |
da8b7f4f | 8992 | int header_line_height = WINDOW_HEADER_LINE_HEIGHT (w); |
ffbbc941 KS |
8993 | |
8994 | p.by = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height, row->y)); | |
8995 | p.ny = row->visible_height; | |
8996 | } | |
8997 | ||
8998 | /* Adjust y to the offset in the row to start drawing the bitmap. */ | |
8999 | p.y += (row->height - p.h) / 2; | |
9000 | ||
9001 | rif->draw_fringe_bitmap (w, row, &p); | |
9002 | } | |
9003 | ||
9004 | /* Draw fringe bitmaps for glyph row ROW on window W. Call this | |
9005 | function with input blocked. */ | |
9006 | ||
9007 | void | |
9008 | draw_row_fringe_bitmaps (w, row) | |
9009 | struct window *w; | |
9010 | struct glyph_row *row; | |
9011 | { | |
ffbbc941 KS |
9012 | enum fringe_bitmap_type bitmap; |
9013 | ||
9014 | xassert (interrupt_input_blocked); | |
9015 | ||
9016 | /* If row is completely invisible, because of vscrolling, we | |
9017 | don't have to draw anything. */ | |
9018 | if (row->visible_height <= 0) | |
9019 | return; | |
9020 | ||
da8b7f4f | 9021 | if (WINDOW_LEFT_FRINGE_WIDTH (w) != 0) |
ffbbc941 KS |
9022 | { |
9023 | /* Decide which bitmap to draw in the left fringe. */ | |
9024 | if (row->overlay_arrow_p) | |
9025 | bitmap = OVERLAY_ARROW_BITMAP; | |
9026 | else if (row->truncated_on_left_p) | |
9027 | bitmap = LEFT_TRUNCATION_BITMAP; | |
9028 | else if (MATRIX_ROW_CONTINUATION_LINE_P (row)) | |
9029 | bitmap = CONTINUATION_LINE_BITMAP; | |
9030 | else if (row->indicate_empty_line_p) | |
9031 | bitmap = ZV_LINE_BITMAP; | |
9032 | else | |
9033 | bitmap = NO_FRINGE_BITMAP; | |
9034 | ||
9035 | draw_fringe_bitmap (w, row, bitmap, 1); | |
9036 | } | |
9037 | ||
da8b7f4f | 9038 | if (WINDOW_RIGHT_FRINGE_WIDTH (w) != 0) |
ffbbc941 KS |
9039 | { |
9040 | /* Decide which bitmap to draw in the right fringe. */ | |
9041 | if (row->truncated_on_right_p) | |
9042 | bitmap = RIGHT_TRUNCATION_BITMAP; | |
9043 | else if (row->continued_p) | |
9044 | bitmap = CONTINUED_LINE_BITMAP; | |
da8b7f4f | 9045 | else if (row->indicate_empty_line_p && WINDOW_LEFT_FRINGE_WIDTH (w) == 0) |
ffbbc941 KS |
9046 | bitmap = ZV_LINE_BITMAP; |
9047 | else | |
9048 | bitmap = NO_FRINGE_BITMAP; | |
9049 | ||
9050 | draw_fringe_bitmap (w, row, bitmap, 0); | |
9051 | } | |
9052 | } | |
9053 | ||
9054 | ||
9055 | /* Compute actual fringe widths */ | |
9056 | ||
9057 | void | |
9058 | compute_fringe_widths (f, redraw) | |
9059 | struct frame *f; | |
9060 | int redraw; | |
9061 | { | |
da8b7f4f KS |
9062 | int o_left = FRAME_LEFT_FRINGE_WIDTH (f); |
9063 | int o_right = FRAME_RIGHT_FRINGE_WIDTH (f); | |
9064 | int o_cols = FRAME_FRINGE_COLS (f); | |
ffbbc941 KS |
9065 | |
9066 | Lisp_Object left_fringe = Fassq (Qleft_fringe, f->param_alist); | |
9067 | Lisp_Object right_fringe = Fassq (Qright_fringe, f->param_alist); | |
9068 | int left_fringe_width, right_fringe_width; | |
9069 | ||
9070 | if (!NILP (left_fringe)) | |
9071 | left_fringe = Fcdr (left_fringe); | |
9072 | if (!NILP (right_fringe)) | |
9073 | right_fringe = Fcdr (right_fringe); | |
9074 | ||
9075 | left_fringe_width = ((NILP (left_fringe) || !INTEGERP (left_fringe)) ? 8 : | |
9076 | XINT (left_fringe)); | |
9077 | right_fringe_width = ((NILP (right_fringe) || !INTEGERP (right_fringe)) ? 8 : | |
9078 | XINT (right_fringe)); | |
9079 | ||
9080 | if (left_fringe_width || right_fringe_width) | |
9081 | { | |
9082 | int left_wid = left_fringe_width >= 0 ? left_fringe_width : -left_fringe_width; | |
9083 | int right_wid = right_fringe_width >= 0 ? right_fringe_width : -right_fringe_width; | |
9084 | int conf_wid = left_wid + right_wid; | |
da8b7f4f | 9085 | int font_wid = FRAME_COLUMN_WIDTH (f); |
ffbbc941 KS |
9086 | int cols = (left_wid + right_wid + font_wid-1) / font_wid; |
9087 | int real_wid = cols * font_wid; | |
9088 | if (left_wid && right_wid) | |
9089 | { | |
9090 | if (left_fringe_width < 0) | |
9091 | { | |
9092 | /* Left fringe width is fixed, adjust right fringe if necessary */ | |
da8b7f4f KS |
9093 | FRAME_LEFT_FRINGE_WIDTH (f) = left_wid; |
9094 | FRAME_RIGHT_FRINGE_WIDTH (f) = real_wid - left_wid; | |
ffbbc941 KS |
9095 | } |
9096 | else if (right_fringe_width < 0) | |
9097 | { | |
9098 | /* Right fringe width is fixed, adjust left fringe if necessary */ | |
da8b7f4f KS |
9099 | FRAME_LEFT_FRINGE_WIDTH (f) = real_wid - right_wid; |
9100 | FRAME_RIGHT_FRINGE_WIDTH (f) = right_wid; | |
ffbbc941 KS |
9101 | } |
9102 | else | |
9103 | { | |
9104 | /* Adjust both fringes with an equal amount. | |
9105 | Note that we are doing integer arithmetic here, so don't | |
9106 | lose a pixel if the total width is an odd number. */ | |
9107 | int fill = real_wid - conf_wid; | |
da8b7f4f KS |
9108 | FRAME_LEFT_FRINGE_WIDTH (f) = left_wid + fill/2; |
9109 | FRAME_RIGHT_FRINGE_WIDTH (f) = right_wid + fill - fill/2; | |
ffbbc941 KS |
9110 | } |
9111 | } | |
9112 | else if (left_fringe_width) | |
9113 | { | |
da8b7f4f KS |
9114 | FRAME_LEFT_FRINGE_WIDTH (f) = real_wid; |
9115 | FRAME_RIGHT_FRINGE_WIDTH (f) = 0; | |
ffbbc941 KS |
9116 | } |
9117 | else | |
9118 | { | |
da8b7f4f KS |
9119 | FRAME_LEFT_FRINGE_WIDTH (f) = 0; |
9120 | FRAME_RIGHT_FRINGE_WIDTH (f) = real_wid; | |
ffbbc941 | 9121 | } |
da8b7f4f | 9122 | FRAME_FRINGE_COLS (f) = cols; |
ffbbc941 KS |
9123 | } |
9124 | else | |
9125 | { | |
da8b7f4f KS |
9126 | FRAME_LEFT_FRINGE_WIDTH (f) = 0; |
9127 | FRAME_RIGHT_FRINGE_WIDTH (f) = 0; | |
9128 | FRAME_FRINGE_COLS (f) = 0; | |
ffbbc941 KS |
9129 | } |
9130 | ||
9131 | if (redraw && FRAME_VISIBLE_P (f)) | |
da8b7f4f KS |
9132 | if (o_left != FRAME_LEFT_FRINGE_WIDTH (f) || |
9133 | o_right != FRAME_RIGHT_FRINGE_WIDTH (f) || | |
9134 | o_cols != FRAME_FRINGE_COLS (f)) | |
ffbbc941 KS |
9135 | redraw_frame (f); |
9136 | } | |
9137 | ||
9138 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 9139 | |
feb0c42f | 9140 | |
5f5c8ee5 GM |
9141 | \f |
9142 | /************************************************************************ | |
9143 | Horizontal scrolling | |
9144 | ************************************************************************/ | |
feb0c42f | 9145 | |
5f5c8ee5 GM |
9146 | static int hscroll_window_tree P_ ((Lisp_Object)); |
9147 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 9148 | |
5f5c8ee5 GM |
9149 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
9150 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
9151 | that it is not within a certain margin at the window's left and | |
9152 | right border. Value is non-zero if any window's hscroll has been | |
9153 | changed. */ | |
9154 | ||
9155 | static int | |
9156 | hscroll_window_tree (window) | |
9157 | Lisp_Object window; | |
9158 | { | |
9159 | int hscrolled_p = 0; | |
e76d28d5 | 9160 | int hscroll_relative_p = FLOATP (Vhscroll_step); |
1df7e8f0 EZ |
9161 | int hscroll_step_abs = 0; |
9162 | double hscroll_step_rel = 0; | |
9163 | ||
9164 | if (hscroll_relative_p) | |
9165 | { | |
e76d28d5 | 9166 | hscroll_step_rel = XFLOAT_DATA (Vhscroll_step); |
1df7e8f0 EZ |
9167 | if (hscroll_step_rel < 0) |
9168 | { | |
9169 | hscroll_relative_p = 0; | |
9170 | hscroll_step_abs = 0; | |
9171 | } | |
9172 | } | |
e76d28d5 | 9173 | else if (INTEGERP (Vhscroll_step)) |
1df7e8f0 | 9174 | { |
e76d28d5 | 9175 | hscroll_step_abs = XINT (Vhscroll_step); |
1df7e8f0 EZ |
9176 | if (hscroll_step_abs < 0) |
9177 | hscroll_step_abs = 0; | |
9178 | } | |
9179 | else | |
9180 | hscroll_step_abs = 0; | |
9181 | ||
5f5c8ee5 | 9182 | while (WINDOWP (window)) |
90adcf20 | 9183 | { |
5f5c8ee5 | 9184 | struct window *w = XWINDOW (window); |
1df7e8f0 | 9185 | |
5f5c8ee5 GM |
9186 | if (WINDOWP (w->hchild)) |
9187 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
9188 | else if (WINDOWP (w->vchild)) | |
9189 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
9190 | else if (w->cursor.vpos >= 0) | |
9191 | { | |
da8b7f4f KS |
9192 | int h_margin; |
9193 | int text_area_width; | |
92a90e89 GM |
9194 | struct glyph_row *current_cursor_row |
9195 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
9196 | struct glyph_row *desired_cursor_row | |
9197 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
9198 | struct glyph_row *cursor_row | |
9199 | = (desired_cursor_row->enabled_p | |
9200 | ? desired_cursor_row | |
9201 | : current_cursor_row); | |
a2725ab2 | 9202 | |
da8b7f4f | 9203 | text_area_width = window_box_width (w, TEXT_AREA); |
90adcf20 | 9204 | |
5f5c8ee5 | 9205 | /* Scroll when cursor is inside this scroll margin. */ |
da8b7f4f | 9206 | h_margin = hscroll_margin * WINDOW_FRAME_COLUMN_WIDTH (w); |
1df7e8f0 | 9207 | |
5f5c8ee5 | 9208 | if ((XFASTINT (w->hscroll) |
e76d28d5 | 9209 | && w->cursor.x <= h_margin) |
92a90e89 GM |
9210 | || (cursor_row->enabled_p |
9211 | && cursor_row->truncated_on_right_p | |
e76d28d5 | 9212 | && (w->cursor.x >= text_area_width - h_margin))) |
08b610e4 | 9213 | { |
5f5c8ee5 GM |
9214 | struct it it; |
9215 | int hscroll; | |
9216 | struct buffer *saved_current_buffer; | |
9217 | int pt; | |
1df7e8f0 | 9218 | int wanted_x; |
5f5c8ee5 GM |
9219 | |
9220 | /* Find point in a display of infinite width. */ | |
9221 | saved_current_buffer = current_buffer; | |
9222 | current_buffer = XBUFFER (w->buffer); | |
1df7e8f0 | 9223 | |
5f5c8ee5 GM |
9224 | if (w == XWINDOW (selected_window)) |
9225 | pt = BUF_PT (current_buffer); | |
9226 | else | |
08b610e4 | 9227 | { |
5f5c8ee5 GM |
9228 | pt = marker_position (w->pointm); |
9229 | pt = max (BEGV, pt); | |
9230 | pt = min (ZV, pt); | |
9231 | } | |
9232 | ||
9233 | /* Move iterator to pt starting at cursor_row->start in | |
9234 | a line with infinite width. */ | |
9235 | init_to_row_start (&it, w, cursor_row); | |
9236 | it.last_visible_x = INFINITY; | |
9237 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
9238 | current_buffer = saved_current_buffer; | |
9239 | ||
1df7e8f0 EZ |
9240 | /* Position cursor in window. */ |
9241 | if (!hscroll_relative_p && hscroll_step_abs == 0) | |
9242 | hscroll = max (0, it.current_x - text_area_width / 2) | |
da8b7f4f | 9243 | / FRAME_COLUMN_WIDTH (it.f); |
e76d28d5 | 9244 | else if (w->cursor.x >= text_area_width - h_margin) |
1df7e8f0 EZ |
9245 | { |
9246 | if (hscroll_relative_p) | |
9247 | wanted_x = text_area_width * (1 - hscroll_step_rel) | |
e76d28d5 | 9248 | - h_margin; |
1df7e8f0 EZ |
9249 | else |
9250 | wanted_x = text_area_width | |
da8b7f4f | 9251 | - hscroll_step_abs * FRAME_COLUMN_WIDTH (it.f) |
e76d28d5 | 9252 | - h_margin; |
1df7e8f0 | 9253 | hscroll |
da8b7f4f | 9254 | = max (0, it.current_x - wanted_x) / FRAME_COLUMN_WIDTH (it.f); |
1df7e8f0 EZ |
9255 | } |
9256 | else | |
9257 | { | |
9258 | if (hscroll_relative_p) | |
9259 | wanted_x = text_area_width * hscroll_step_rel | |
e76d28d5 | 9260 | + h_margin; |
1df7e8f0 | 9261 | else |
da8b7f4f | 9262 | wanted_x = hscroll_step_abs * FRAME_COLUMN_WIDTH (it.f) |
e76d28d5 | 9263 | + h_margin; |
1df7e8f0 | 9264 | hscroll |
da8b7f4f | 9265 | = max (0, it.current_x - wanted_x) / FRAME_COLUMN_WIDTH (it.f); |
1df7e8f0 | 9266 | } |
3172f70b | 9267 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
9268 | |
9269 | /* Don't call Fset_window_hscroll if value hasn't | |
9270 | changed because it will prevent redisplay | |
9271 | optimizations. */ | |
9272 | if (XFASTINT (w->hscroll) != hscroll) | |
9273 | { | |
3172f70b GM |
9274 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
9275 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 9276 | hscrolled_p = 1; |
08b610e4 | 9277 | } |
08b610e4 | 9278 | } |
08b610e4 | 9279 | } |
a2725ab2 | 9280 | |
5f5c8ee5 | 9281 | window = w->next; |
90adcf20 | 9282 | } |
cd6dfed6 | 9283 | |
5f5c8ee5 GM |
9284 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
9285 | return hscrolled_p; | |
9286 | } | |
9287 | ||
9288 | ||
9289 | /* Set hscroll so that cursor is visible and not inside horizontal | |
9290 | scroll margins for all windows in the tree rooted at WINDOW. See | |
9291 | also hscroll_window_tree above. Value is non-zero if any window's | |
9292 | hscroll has been changed. If it has, desired matrices on the frame | |
9293 | of WINDOW are cleared. */ | |
9294 | ||
9295 | static int | |
9296 | hscroll_windows (window) | |
9297 | Lisp_Object window; | |
9298 | { | |
d475bcb8 | 9299 | int hscrolled_p; |
2311178e | 9300 | |
d475bcb8 GM |
9301 | if (automatic_hscrolling_p) |
9302 | { | |
9303 | hscrolled_p = hscroll_window_tree (window); | |
9304 | if (hscrolled_p) | |
9305 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
9306 | } | |
9307 | else | |
9308 | hscrolled_p = 0; | |
5f5c8ee5 | 9309 | return hscrolled_p; |
90adcf20 | 9310 | } |
5f5c8ee5 GM |
9311 | |
9312 | ||
90adcf20 | 9313 | \f |
5f5c8ee5 GM |
9314 | /************************************************************************ |
9315 | Redisplay | |
9316 | ************************************************************************/ | |
9317 | ||
9318 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
9319 | to a non-zero value. This is sometimes handy to have in a debugger | |
9320 | session. */ | |
9321 | ||
9322 | #if GLYPH_DEBUG | |
a2889657 | 9323 | |
5f5c8ee5 GM |
9324 | /* First and last unchanged row for try_window_id. */ |
9325 | ||
9326 | int debug_first_unchanged_at_end_vpos; | |
9327 | int debug_last_unchanged_at_beg_vpos; | |
9328 | ||
9329 | /* Delta vpos and y. */ | |
9330 | ||
9331 | int debug_dvpos, debug_dy; | |
9332 | ||
9333 | /* Delta in characters and bytes for try_window_id. */ | |
9334 | ||
9335 | int debug_delta, debug_delta_bytes; | |
9336 | ||
9337 | /* Values of window_end_pos and window_end_vpos at the end of | |
9338 | try_window_id. */ | |
9339 | ||
31ade731 | 9340 | EMACS_INT debug_end_pos, debug_end_vpos; |
5f5c8ee5 GM |
9341 | |
9342 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
9343 | format string. A1...A9 are a supplement for a variable-length | |
9344 | argument list. If trace_redisplay_p is non-zero also printf the | |
9345 | resulting string to stderr. */ | |
9346 | ||
9347 | static void | |
9348 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
9349 | struct window *w; | |
9350 | char *fmt; | |
9351 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
9352 | { | |
9353 | char buffer[512]; | |
9354 | char *method = w->desired_matrix->method; | |
9355 | int len = strlen (method); | |
9356 | int size = sizeof w->desired_matrix->method; | |
9357 | int remaining = size - len - 1; | |
9358 | ||
9359 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
9360 | if (len && remaining) | |
9361 | { | |
9362 | method[len] = '|'; | |
9363 | --remaining, ++len; | |
9364 | } | |
2311178e | 9365 | |
5f5c8ee5 GM |
9366 | strncpy (method + len, buffer, remaining); |
9367 | ||
9368 | if (trace_redisplay_p) | |
9369 | fprintf (stderr, "%p (%s): %s\n", | |
9370 | w, | |
9371 | ((BUFFERP (w->buffer) | |
9372 | && STRINGP (XBUFFER (w->buffer)->name)) | |
2051c264 | 9373 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
5f5c8ee5 GM |
9374 | : "no buffer"), |
9375 | buffer); | |
9376 | } | |
a2889657 | 9377 | |
5f5c8ee5 | 9378 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 9379 | |
a2889657 | 9380 | |
5f5c8ee5 GM |
9381 | /* Value is non-zero if all changes in window W, which displays |
9382 | current_buffer, are in the text between START and END. START is a | |
9383 | buffer position, END is given as a distance from Z. Used in | |
9384 | redisplay_internal for display optimization. */ | |
9385 | ||
9386 | static INLINE int | |
9387 | text_outside_line_unchanged_p (w, start, end) | |
9388 | struct window *w; | |
9389 | int start, end; | |
9390 | { | |
9391 | int unchanged_p = 1; | |
2311178e | 9392 | |
5f5c8ee5 GM |
9393 | /* If text or overlays have changed, see where. */ |
9394 | if (XFASTINT (w->last_modified) < MODIFF | |
9395 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
9396 | { | |
9397 | /* Gap in the line? */ | |
9398 | if (GPT < start || Z - GPT < end) | |
9399 | unchanged_p = 0; | |
9400 | ||
9401 | /* Changes start in front of the line, or end after it? */ | |
9402 | if (unchanged_p | |
9142dd5b GM |
9403 | && (BEG_UNCHANGED < start - 1 |
9404 | || END_UNCHANGED < end)) | |
5f5c8ee5 | 9405 | unchanged_p = 0; |
2311178e | 9406 | |
5f5c8ee5 GM |
9407 | /* If selective display, can't optimize if changes start at the |
9408 | beginning of the line. */ | |
9409 | if (unchanged_p | |
9410 | && INTEGERP (current_buffer->selective_display) | |
9411 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 9412 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 9413 | unchanged_p = 0; |
47d57b22 GM |
9414 | |
9415 | /* If there are overlays at the start or end of the line, these | |
9416 | may have overlay strings with newlines in them. A change at | |
9417 | START, for instance, may actually concern the display of such | |
9418 | overlay strings as well, and they are displayed on different | |
9419 | lines. So, quickly rule out this case. (For the future, it | |
9420 | might be desirable to implement something more telling than | |
9421 | just BEG/END_UNCHANGED.) */ | |
9422 | if (unchanged_p) | |
9423 | { | |
9424 | if (BEG + BEG_UNCHANGED == start | |
9425 | && overlay_touches_p (start)) | |
9426 | unchanged_p = 0; | |
9427 | if (END_UNCHANGED == end | |
9428 | && overlay_touches_p (Z - end)) | |
9429 | unchanged_p = 0; | |
9430 | } | |
5f5c8ee5 GM |
9431 | } |
9432 | ||
9433 | return unchanged_p; | |
9434 | } | |
9435 | ||
9436 | ||
9437 | /* Do a frame update, taking possible shortcuts into account. This is | |
9438 | the main external entry point for redisplay. | |
9439 | ||
9440 | If the last redisplay displayed an echo area message and that message | |
9441 | is no longer requested, we clear the echo area or bring back the | |
9442 | mini-buffer if that is in use. */ | |
20de20dc | 9443 | |
a2889657 JB |
9444 | void |
9445 | redisplay () | |
e9874cee RS |
9446 | { |
9447 | redisplay_internal (0); | |
9448 | } | |
9449 | ||
47d57b22 | 9450 | |
260a86a0 KH |
9451 | /* Return 1 if point moved out of or into a composition. Otherwise |
9452 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
9453 | position. BUF and PT are the current point buffer and position. */ | |
9454 | ||
9455 | int | |
9456 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
9457 | struct buffer *prev_buf, *buf; | |
9458 | int prev_pt, pt; | |
9459 | { | |
9460 | int start, end; | |
9461 | Lisp_Object prop; | |
9462 | Lisp_Object buffer; | |
9463 | ||
9464 | XSETBUFFER (buffer, buf); | |
9465 | /* Check a composition at the last point if point moved within the | |
9466 | same buffer. */ | |
9467 | if (prev_buf == buf) | |
9468 | { | |
9469 | if (prev_pt == pt) | |
9470 | /* Point didn't move. */ | |
9471 | return 0; | |
2311178e | 9472 | |
260a86a0 KH |
9473 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) |
9474 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
9475 | && COMPOSITION_VALID_P (start, end, prop) | |
9476 | && start < prev_pt && end > prev_pt) | |
9477 | /* The last point was within the composition. Return 1 iff | |
9478 | point moved out of the composition. */ | |
9479 | return (pt <= start || pt >= end); | |
9480 | } | |
9481 | ||
9482 | /* Check a composition at the current point. */ | |
9483 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
9484 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
9485 | && COMPOSITION_VALID_P (start, end, prop) | |
9486 | && start < pt && end > pt); | |
9487 | } | |
5f5c8ee5 | 9488 | |
47d57b22 | 9489 | |
9142dd5b GM |
9490 | /* Reconsider the setting of B->clip_changed which is displayed |
9491 | in window W. */ | |
9492 | ||
9493 | static INLINE void | |
9494 | reconsider_clip_changes (w, b) | |
9495 | struct window *w; | |
9496 | struct buffer *b; | |
9497 | { | |
c62c1bb5 | 9498 | if (b->clip_changed |
9142dd5b GM |
9499 | && !NILP (w->window_end_valid) |
9500 | && w->current_matrix->buffer == b | |
9501 | && w->current_matrix->zv == BUF_ZV (b) | |
9502 | && w->current_matrix->begv == BUF_BEGV (b)) | |
9503 | b->clip_changed = 0; | |
260a86a0 KH |
9504 | |
9505 | /* If display wasn't paused, and W is not a tool bar window, see if | |
9506 | point has been moved into or out of a composition. In that case, | |
9507 | we set b->clip_changed to 1 to force updating the screen. If | |
9508 | b->clip_changed has already been set to 1, we can skip this | |
9509 | check. */ | |
9510 | if (!b->clip_changed | |
9511 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
9512 | { | |
9513 | int pt; | |
9514 | ||
9515 | if (w == XWINDOW (selected_window)) | |
9516 | pt = BUF_PT (current_buffer); | |
9517 | else | |
9518 | pt = marker_position (w->pointm); | |
9519 | ||
9520 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 9521 | || pt != XINT (w->last_point)) |
260a86a0 | 9522 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 9523 | XINT (w->last_point), |
260a86a0 KH |
9524 | XBUFFER (w->buffer), pt)) |
9525 | b->clip_changed = 1; | |
9526 | } | |
9142dd5b | 9527 | } |
aac2d8b2 RS |
9528 | \f |
9529 | #define STOP_POLLING \ | |
9530 | do { if (! polling_stopped_here) stop_polling (); \ | |
9531 | polling_stopped_here = 1; } while (0) | |
9532 | ||
9533 | #define RESUME_POLLING \ | |
9534 | do { if (polling_stopped_here) start_polling (); \ | |
9535 | polling_stopped_here = 0; } while (0) | |
9142dd5b GM |
9536 | |
9537 | ||
5f5c8ee5 GM |
9538 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
9539 | response to any user action; therefore, we should preserve the echo | |
9540 | area. (Actually, our caller does that job.) Perhaps in the future | |
9541 | avoid recentering windows if it is not necessary; currently that | |
9542 | causes some problems. */ | |
e9874cee RS |
9543 | |
9544 | static void | |
9545 | redisplay_internal (preserve_echo_area) | |
9546 | int preserve_echo_area; | |
a2889657 | 9547 | { |
5f5c8ee5 GM |
9548 | struct window *w = XWINDOW (selected_window); |
9549 | struct frame *f = XFRAME (w->frame); | |
9550 | int pause; | |
a2889657 | 9551 | int must_finish = 0; |
5f5c8ee5 | 9552 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 9553 | int number_of_visible_frames; |
28514cd9 | 9554 | int count; |
886bd6f2 | 9555 | struct frame *sf = SELECTED_FRAME (); |
aac2d8b2 | 9556 | int polling_stopped_here = 0; |
a2889657 | 9557 | |
5f5c8ee5 GM |
9558 | /* Non-zero means redisplay has to consider all windows on all |
9559 | frames. Zero means, only selected_window is considered. */ | |
9560 | int consider_all_windows_p; | |
2311178e | 9561 | |
5f5c8ee5 GM |
9562 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); |
9563 | ||
9564 | /* No redisplay if running in batch mode or frame is not yet fully | |
9565 | initialized, or redisplay is explicitly turned off by setting | |
9566 | Vinhibit_redisplay. */ | |
9567 | if (noninteractive | |
9568 | || !NILP (Vinhibit_redisplay) | |
9569 | || !f->glyphs_initialized_p) | |
a2889657 JB |
9570 | return; |
9571 | ||
5f5c8ee5 GM |
9572 | /* The flag redisplay_performed_directly_p is set by |
9573 | direct_output_for_insert when it already did the whole screen | |
9574 | update necessary. */ | |
9575 | if (redisplay_performed_directly_p) | |
9576 | { | |
9577 | redisplay_performed_directly_p = 0; | |
9578 | if (!hscroll_windows (selected_window)) | |
9579 | return; | |
9580 | } | |
9581 | ||
488dd4c4 | 9582 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
15f0cf78 RS |
9583 | if (popup_activated ()) |
9584 | return; | |
9585 | #endif | |
9586 | ||
28514cd9 | 9587 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 9588 | if (redisplaying_p) |
735c094c KH |
9589 | return; |
9590 | ||
28514cd9 GM |
9591 | /* Record a function that resets redisplaying_p to its old value |
9592 | when we leave this function. */ | |
331379bf | 9593 | count = SPECPDL_INDEX (); |
28514cd9 GM |
9594 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); |
9595 | ++redisplaying_p; | |
26683087 | 9596 | specbind (Qinhibit_free_realized_faces, Qnil); |
2311178e | 9597 | |
8b32d885 | 9598 | retry: |
bd9d0f3f | 9599 | pause = 0; |
9142dd5b GM |
9600 | reconsider_clip_changes (w, current_buffer); |
9601 | ||
5f5c8ee5 GM |
9602 | /* If new fonts have been loaded that make a glyph matrix adjustment |
9603 | necessary, do it. */ | |
9604 | if (fonts_changed_p) | |
9605 | { | |
9606 | adjust_glyphs (NULL); | |
9607 | ++windows_or_buffers_changed; | |
9608 | fonts_changed_p = 0; | |
9609 | } | |
9610 | ||
6961e0c1 GM |
9611 | /* If face_change_count is non-zero, init_iterator will free all |
9612 | realized faces, which includes the faces referenced from current | |
9613 | matrices. So, we can't reuse current matrices in this case. */ | |
9614 | if (face_change_count) | |
9615 | ++windows_or_buffers_changed; | |
9616 | ||
886bd6f2 GM |
9617 | if (! FRAME_WINDOW_P (sf) |
9618 | && previous_terminal_frame != sf) | |
20de20dc | 9619 | { |
5f5c8ee5 GM |
9620 | /* Since frames on an ASCII terminal share the same display |
9621 | area, displaying a different frame means redisplay the whole | |
9622 | thing. */ | |
20de20dc | 9623 | windows_or_buffers_changed++; |
886bd6f2 GM |
9624 | SET_FRAME_GARBAGED (sf); |
9625 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 9626 | } |
886bd6f2 | 9627 | previous_terminal_frame = sf; |
20de20dc | 9628 | |
5f5c8ee5 GM |
9629 | /* Set the visible flags for all frames. Do this before checking |
9630 | for resized or garbaged frames; they want to know if their frames | |
9631 | are visible. See the comment in frame.h for | |
9632 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 9633 | { |
35f56f96 | 9634 | Lisp_Object tail, frame; |
d724d989 | 9635 | |
89819bdd RS |
9636 | number_of_visible_frames = 0; |
9637 | ||
35f56f96 | 9638 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 9639 | { |
5f5c8ee5 | 9640 | struct frame *f = XFRAME (frame); |
2311178e | 9641 | |
5f5c8ee5 GM |
9642 | FRAME_SAMPLE_VISIBILITY (f); |
9643 | if (FRAME_VISIBLE_P (f)) | |
9644 | ++number_of_visible_frames; | |
9645 | clear_desired_matrices (f); | |
f82aff7c | 9646 | } |
d724d989 JB |
9647 | } |
9648 | ||
44fa5b1e | 9649 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 9650 | do_pending_window_change (1); |
a2889657 | 9651 | |
5f5c8ee5 | 9652 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 9653 | if (frame_garbaged) |
c6e89d6c | 9654 | clear_garbaged_frames (); |
a2889657 | 9655 | |
e037b9ec | 9656 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
9657 | prepare_menu_bars (); |
9658 | ||
28995e67 | 9659 | if (windows_or_buffers_changed) |
a2889657 JB |
9660 | update_mode_lines++; |
9661 | ||
538f13d4 RS |
9662 | /* Detect case that we need to write or remove a star in the mode line. */ |
9663 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
9664 | { |
9665 | w->update_mode_line = Qt; | |
9666 | if (buffer_shared > 1) | |
9667 | update_mode_lines++; | |
9668 | } | |
9669 | ||
5f5c8ee5 | 9670 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
9671 | if (!NILP (w->column_number_displayed) |
9672 | /* This alternative quickly identifies a common case | |
9673 | where no change is needed. */ | |
9674 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
9675 | && XFASTINT (w->last_modified) >= MODIFF |
9676 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
9677 | && (XFASTINT (w->column_number_displayed) |
9678 | != (int) current_column ())) /* iftc */ | |
9679 | w->update_mode_line = Qt; | |
28995e67 | 9680 | |
44fa5b1e | 9681 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 9682 | |
5f5c8ee5 GM |
9683 | /* The variable buffer_shared is set in redisplay_window and |
9684 | indicates that we redisplay a buffer in different windows. See | |
9685 | there. */ | |
5fb96e96 RS |
9686 | consider_all_windows_p = (update_mode_lines || buffer_shared > 1 |
9687 | || cursor_type_changed); | |
a2889657 JB |
9688 | |
9689 | /* If specs for an arrow have changed, do thorough redisplay | |
9690 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 9691 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 9692 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 9693 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 9694 | |
90adcf20 RS |
9695 | /* Normally the message* functions will have already displayed and |
9696 | updated the echo area, but the frame may have been trashed, or | |
9697 | the update may have been preempted, so display the echo area | |
6e019995 | 9698 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 9699 | the echo area should be cleared. */ |
96d5e9a0 GM |
9700 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
9701 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
9702 | || (message_cleared_p |
9703 | && minibuf_level == 0 | |
9704 | /* If the mini-window is currently selected, this means the | |
9705 | echo-area doesn't show through. */ | |
9706 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 9707 | { |
c6e89d6c | 9708 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 9709 | must_finish = 1; |
6e019995 GM |
9710 | |
9711 | /* If we don't display the current message, don't clear the | |
9712 | message_cleared_p flag, because, if we did, we wouldn't clear | |
9713 | the echo area in the next redisplay which doesn't preserve | |
9714 | the echo area. */ | |
9715 | if (!display_last_displayed_message_p) | |
9716 | message_cleared_p = 0; | |
2311178e | 9717 | |
c6e89d6c GM |
9718 | if (fonts_changed_p) |
9719 | goto retry; | |
9720 | else if (window_height_changed_p) | |
9721 | { | |
9722 | consider_all_windows_p = 1; | |
9723 | ++update_mode_lines; | |
9724 | ++windows_or_buffers_changed; | |
2311178e | 9725 | |
9142dd5b GM |
9726 | /* If window configuration was changed, frames may have been |
9727 | marked garbaged. Clear them or we will experience | |
9728 | surprises wrt scrolling. */ | |
9729 | if (frame_garbaged) | |
9730 | clear_garbaged_frames (); | |
c6e89d6c | 9731 | } |
90adcf20 | 9732 | } |
97a36635 | 9733 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
9734 | && (current_buffer->clip_changed |
9735 | || XFASTINT (w->last_modified) < MODIFF | |
9736 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 9737 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
9738 | { |
9739 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
9740 | showing if its contents might have changed. */ |
9741 | must_finish = 1; | |
9742 | consider_all_windows_p = 1; | |
c6e89d6c | 9743 | ++windows_or_buffers_changed; |
dd2eb166 | 9744 | ++update_mode_lines; |
2311178e | 9745 | |
9142dd5b GM |
9746 | /* If window configuration was changed, frames may have been |
9747 | marked garbaged. Clear them or we will experience | |
9748 | surprises wrt scrolling. */ | |
9749 | if (frame_garbaged) | |
9750 | clear_garbaged_frames (); | |
c6e89d6c | 9751 | } |
2311178e | 9752 | |
90adcf20 | 9753 | |
5f5c8ee5 GM |
9754 | /* If showing the region, and mark has changed, we must redisplay |
9755 | the whole window. The assignment to this_line_start_pos prevents | |
9756 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
9757 | if (((!NILP (Vtransient_mark_mode) |
9758 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
9759 | != !NILP (w->region_showing)) | |
82d04750 JB |
9760 | || (!NILP (w->region_showing) |
9761 | && !EQ (w->region_showing, | |
9762 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
9763 | CHARPOS (this_line_start_pos) = 0; |
9764 | ||
9765 | /* Optimize the case that only the line containing the cursor in the | |
9766 | selected window has changed. Variables starting with this_ are | |
9767 | set in display_line and record information about the line | |
9768 | containing the cursor. */ | |
9769 | tlbufpos = this_line_start_pos; | |
9770 | tlendpos = this_line_end_pos; | |
9771 | if (!consider_all_windows_p | |
9772 | && CHARPOS (tlbufpos) > 0 | |
9773 | && NILP (w->update_mode_line) | |
73af359d | 9774 | && !current_buffer->clip_changed |
c62c1bb5 | 9775 | && !current_buffer->prevent_redisplay_optimizations_p |
44fa5b1e | 9776 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 9777 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 9778 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
9779 | && this_line_buffer == current_buffer |
9780 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 9781 | && NILP (w->force_start) |
acda20e1 | 9782 | && NILP (w->optional_new_start) |
5f5c8ee5 GM |
9783 | /* Point must be on the line that we have info recorded about. */ |
9784 | && PT >= CHARPOS (tlbufpos) | |
9785 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
9786 | /* All text outside that line, including its final newline, |
9787 | must be unchanged */ | |
5f5c8ee5 GM |
9788 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
9789 | CHARPOS (tlendpos))) | |
9790 | { | |
9791 | if (CHARPOS (tlbufpos) > BEGV | |
9792 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
9793 | && (CHARPOS (tlbufpos) == ZV | |
9794 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
9795 | /* Former continuation line has disappeared by becoming empty */ |
9796 | goto cancel; | |
9797 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 9798 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
9799 | || MINI_WINDOW_P (w)) |
9800 | { | |
1c9241f5 KH |
9801 | /* We have to handle the case of continuation around a |
9802 | wide-column character (See the comment in indent.c around | |
9803 | line 885). | |
9804 | ||
9805 | For instance, in the following case: | |
9806 | ||
9807 | -------- Insert -------- | |
9808 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
9809 | J_I_ ==> J_I_ `^^' are cursors. | |
9810 | ^^ ^^ | |
9811 | -------- -------- | |
9812 | ||
9813 | As we have to redraw the line above, we should goto cancel. */ | |
9814 | ||
5f5c8ee5 GM |
9815 | struct it it; |
9816 | int line_height_before = this_line_pixel_height; | |
9817 | ||
9818 | /* Note that start_display will handle the case that the | |
9819 | line starting at tlbufpos is a continuation lines. */ | |
9820 | start_display (&it, w, tlbufpos); | |
9821 | ||
9822 | /* Implementation note: It this still necessary? */ | |
9823 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
9824 | goto cancel; |
9825 | ||
5f5c8ee5 GM |
9826 | TRACE ((stderr, "trying display optimization 1\n")); |
9827 | w->cursor.vpos = -1; | |
a2889657 | 9828 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
9829 | it.vpos = this_line_vpos; |
9830 | it.current_y = this_line_y; | |
9831 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
9832 | display_line (&it); | |
9833 | ||
a2889657 | 9834 | /* If line contains point, is not continued, |
5f5c8ee5 | 9835 | and ends at same distance from eob as before, we win */ |
2311178e | 9836 | if (w->cursor.vpos >= 0 |
5f5c8ee5 GM |
9837 | /* Line is not continued, otherwise this_line_start_pos |
9838 | would have been set to 0 in display_line. */ | |
9839 | && CHARPOS (this_line_start_pos) | |
9840 | /* Line ends as before. */ | |
9841 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
9842 | /* Line has same height as before. Otherwise other lines | |
9843 | would have to be shifted up or down. */ | |
9844 | && this_line_pixel_height == line_height_before) | |
a2889657 | 9845 | { |
5f5c8ee5 GM |
9846 | /* If this is not the window's last line, we must adjust |
9847 | the charstarts of the lines below. */ | |
9848 | if (it.current_y < it.last_visible_y) | |
9849 | { | |
9850 | struct glyph_row *row | |
9851 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
9852 | int delta, delta_bytes; | |
2311178e | 9853 | |
5f5c8ee5 GM |
9854 | if (Z - CHARPOS (tlendpos) == ZV) |
9855 | { | |
9856 | /* This line ends at end of (accessible part of) | |
9857 | buffer. There is no newline to count. */ | |
9858 | delta = (Z | |
9859 | - CHARPOS (tlendpos) | |
9860 | - MATRIX_ROW_START_CHARPOS (row)); | |
9861 | delta_bytes = (Z_BYTE | |
9862 | - BYTEPOS (tlendpos) | |
9863 | - MATRIX_ROW_START_BYTEPOS (row)); | |
9864 | } | |
9865 | else | |
9866 | { | |
9867 | /* This line ends in a newline. Must take | |
9868 | account of the newline and the rest of the | |
9869 | text that follows. */ | |
9870 | delta = (Z | |
9871 | - CHARPOS (tlendpos) | |
9872 | - MATRIX_ROW_START_CHARPOS (row)); | |
9873 | delta_bytes = (Z_BYTE | |
9874 | - BYTEPOS (tlendpos) | |
9875 | - MATRIX_ROW_START_BYTEPOS (row)); | |
9876 | } | |
2311178e | 9877 | |
f2d86d7a GM |
9878 | increment_matrix_positions (w->current_matrix, |
9879 | this_line_vpos + 1, | |
9880 | w->current_matrix->nrows, | |
9881 | delta, delta_bytes); | |
85bcef6c | 9882 | } |
46db8486 | 9883 | |
5f5c8ee5 GM |
9884 | /* If this row displays text now but previously didn't, |
9885 | or vice versa, w->window_end_vpos may have to be | |
9886 | adjusted. */ | |
9887 | if ((it.glyph_row - 1)->displays_text_p) | |
9888 | { | |
9889 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
9890 | XSETINT (w->window_end_vpos, this_line_vpos); | |
9891 | } | |
9892 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
9893 | && this_line_vpos > 0) | |
9894 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
9895 | w->window_end_valid = Qnil; | |
2311178e | 9896 | |
5f5c8ee5 GM |
9897 | /* Update hint: No need to try to scroll in update_window. */ |
9898 | w->desired_matrix->no_scrolling_p = 1; | |
9899 | ||
9900 | #if GLYPH_DEBUG | |
9901 | *w->desired_matrix->method = 0; | |
9902 | debug_method_add (w, "optimization 1"); | |
9903 | #endif | |
a2889657 JB |
9904 | goto update; |
9905 | } | |
9906 | else | |
9907 | goto cancel; | |
9908 | } | |
5f5c8ee5 GM |
9909 | else if (/* Cursor position hasn't changed. */ |
9910 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
9911 | /* Make sure the cursor was last displayed |
9912 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 | 9913 | && 0 <= w->cursor.vpos |
da8b7f4f | 9914 | && WINDOW_TOTAL_LINES (w) > w->cursor.vpos) |
a2889657 JB |
9915 | { |
9916 | if (!must_finish) | |
9917 | { | |
c6e89d6c | 9918 | do_pending_window_change (1); |
5f5c8ee5 | 9919 | |
2311178e | 9920 | /* We used to always goto end_of_redisplay here, but this |
5f5c8ee5 GM |
9921 | isn't enough if we have a blinking cursor. */ |
9922 | if (w->cursor_off_p == w->last_cursor_off_p) | |
9923 | goto end_of_redisplay; | |
a2889657 JB |
9924 | } |
9925 | goto update; | |
9926 | } | |
8b51f1e3 KH |
9927 | /* If highlighting the region, or if the cursor is in the echo area, |
9928 | then we can't just move the cursor. */ | |
bd66d1ba RS |
9929 | else if (! (!NILP (Vtransient_mark_mode) |
9930 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 9931 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 9932 | || highlight_nonselected_windows) |
8b51f1e3 | 9933 | && NILP (w->region_showing) |
8f897821 | 9934 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 9935 | && !cursor_in_echo_area) |
a2889657 | 9936 | { |
5f5c8ee5 GM |
9937 | struct it it; |
9938 | struct glyph_row *row; | |
9939 | ||
9940 | /* Skip from tlbufpos to PT and see where it is. Note that | |
9941 | PT may be in invisible text. If so, we will end at the | |
9942 | next visible position. */ | |
9943 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
9944 | NULL, DEFAULT_FACE_ID); | |
9945 | it.current_x = this_line_start_x; | |
9946 | it.current_y = this_line_y; | |
9947 | it.vpos = this_line_vpos; | |
2311178e | 9948 | |
5f5c8ee5 GM |
9949 | /* The call to move_it_to stops in front of PT, but |
9950 | moves over before-strings. */ | |
9951 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
9952 | ||
9953 | if (it.vpos == this_line_vpos | |
9954 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
9955 | row->enabled_p)) | |
a2889657 | 9956 | { |
5f5c8ee5 GM |
9957 | xassert (this_line_vpos == it.vpos); |
9958 | xassert (this_line_y == it.current_y); | |
9959 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
9960 | #if GLYPH_DEBUG |
9961 | *w->desired_matrix->method = 0; | |
9962 | debug_method_add (w, "optimization 3"); | |
9963 | #endif | |
a2889657 JB |
9964 | goto update; |
9965 | } | |
9966 | else | |
9967 | goto cancel; | |
9968 | } | |
5f5c8ee5 | 9969 | |
a2889657 | 9970 | cancel: |
5f5c8ee5 GM |
9971 | /* Text changed drastically or point moved off of line. */ |
9972 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
9973 | } |
9974 | ||
5f5c8ee5 GM |
9975 | CHARPOS (this_line_start_pos) = 0; |
9976 | consider_all_windows_p |= buffer_shared > 1; | |
9977 | ++clear_face_cache_count; | |
a2889657 | 9978 | |
2311178e | 9979 | |
bd9d0f3f GM |
9980 | /* Build desired matrices, and update the display. If |
9981 | consider_all_windows_p is non-zero, do it for all windows on all | |
9982 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 9983 | |
5f5c8ee5 | 9984 | if (consider_all_windows_p) |
a2889657 | 9985 | { |
35f56f96 | 9986 | Lisp_Object tail, frame; |
0528abe1 GM |
9987 | int i, n = 0, size = 50; |
9988 | struct frame **updated | |
9989 | = (struct frame **) alloca (size * sizeof *updated); | |
a2889657 | 9990 | |
5f5c8ee5 GM |
9991 | /* Clear the face cache eventually. */ |
9992 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 9993 | { |
5f5c8ee5 | 9994 | clear_face_cache (0); |
463f6b91 RS |
9995 | clear_face_cache_count = 0; |
9996 | } | |
31b24551 | 9997 | |
5f5c8ee5 GM |
9998 | /* Recompute # windows showing selected buffer. This will be |
9999 | incremented each time such a window is displayed. */ | |
a2889657 JB |
10000 | buffer_shared = 0; |
10001 | ||
35f56f96 | 10002 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 10003 | { |
5f5c8ee5 | 10004 | struct frame *f = XFRAME (frame); |
2311178e | 10005 | |
886bd6f2 | 10006 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 10007 | { |
ae02e06a | 10008 | #ifdef HAVE_WINDOW_SYSTEM |
bb336f8d RS |
10009 | if (clear_face_cache_count % 50 == 0 |
10010 | && FRAME_WINDOW_P (f)) | |
10011 | clear_image_cache (f, 0); | |
ae02e06a | 10012 | #endif /* HAVE_WINDOW_SYSTEM */ |
bb336f8d | 10013 | |
5f5c8ee5 GM |
10014 | /* Mark all the scroll bars to be removed; we'll redeem |
10015 | the ones we want when we redisplay their windows. */ | |
9769686d | 10016 | if (condemn_scroll_bars_hook) |
504454e8 | 10017 | condemn_scroll_bars_hook (f); |
30c566e4 | 10018 | |
f21ef775 | 10019 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 10020 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 10021 | |
5f5c8ee5 GM |
10022 | /* Any scroll bars which redisplay_windows should have |
10023 | nuked should now go away. */ | |
9769686d | 10024 | if (judge_scroll_bars_hook) |
504454e8 | 10025 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
10026 | |
10027 | /* If fonts changed, display again. */ | |
b60c9653 RS |
10028 | /* ??? rms: I suspect it is a mistake to jump all the way |
10029 | back to retry here. It should just retry this frame. */ | |
bd9d0f3f GM |
10030 | if (fonts_changed_p) |
10031 | goto retry; | |
2311178e | 10032 | |
bd9d0f3f GM |
10033 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
10034 | { | |
10035 | /* See if we have to hscroll. */ | |
10036 | if (hscroll_windows (f->root_window)) | |
10037 | goto retry; | |
10038 | ||
10039 | /* Prevent various kinds of signals during display | |
10040 | update. stdio is not robust about handling | |
10041 | signals, which can cause an apparent I/O | |
10042 | error. */ | |
10043 | if (interrupt_input) | |
10044 | unrequest_sigio (); | |
aac2d8b2 | 10045 | STOP_POLLING; |
bd9d0f3f GM |
10046 | |
10047 | /* Update the display. */ | |
10048 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
10049 | pause |= update_frame (f, 0, 0); | |
ccbb9ed2 | 10050 | #if 0 /* Exiting the loop can leave the wrong value for buffer_shared. */ |
bd9d0f3f GM |
10051 | if (pause) |
10052 | break; | |
ccbb9ed2 | 10053 | #endif |
bd9d0f3f | 10054 | |
0528abe1 GM |
10055 | if (n == size) |
10056 | { | |
10057 | int nbytes = size * sizeof *updated; | |
10058 | struct frame **p = (struct frame **) alloca (2 * nbytes); | |
10059 | bcopy (updated, p, nbytes); | |
10060 | size *= 2; | |
10061 | } | |
2311178e | 10062 | |
0528abe1 | 10063 | updated[n++] = f; |
bd9d0f3f | 10064 | } |
9769686d | 10065 | } |
30c566e4 | 10066 | } |
0528abe1 | 10067 | |
6f68b035 GM |
10068 | if (!pause) |
10069 | { | |
10070 | /* Do the mark_window_display_accurate after all windows have | |
10071 | been redisplayed because this call resets flags in buffers | |
10072 | which are needed for proper redisplay. */ | |
10073 | for (i = 0; i < n; ++i) | |
10074 | { | |
10075 | struct frame *f = updated[i]; | |
10076 | mark_window_display_accurate (f->root_window, 1); | |
10077 | if (frame_up_to_date_hook) | |
10078 | frame_up_to_date_hook (f); | |
10079 | } | |
0528abe1 | 10080 | } |
a2889657 | 10081 | } |
bd9d0f3f GM |
10082 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
10083 | { | |
10084 | Lisp_Object mini_window; | |
10085 | struct frame *mini_frame; | |
5f5c8ee5 | 10086 | |
82a7ab23 | 10087 | displayed_buffer = XBUFFER (XWINDOW (selected_window)->buffer); |
7033d6df RS |
10088 | /* Use list_of_error, not Qerror, so that |
10089 | we catch only errors and don't run the debugger. */ | |
10090 | internal_condition_case_1 (redisplay_window_1, selected_window, | |
10091 | list_of_error, | |
82a7ab23 | 10092 | redisplay_window_error); |
2311178e | 10093 | |
bd9d0f3f | 10094 | /* Compare desired and current matrices, perform output. */ |
7d0393cf | 10095 | |
26683087 | 10096 | update: |
bd9d0f3f GM |
10097 | /* If fonts changed, display again. */ |
10098 | if (fonts_changed_p) | |
92a90e89 | 10099 | goto retry; |
a2889657 | 10100 | |
bd9d0f3f GM |
10101 | /* Prevent various kinds of signals during display update. |
10102 | stdio is not robust about handling signals, | |
10103 | which can cause an apparent I/O error. */ | |
10104 | if (interrupt_input) | |
10105 | unrequest_sigio (); | |
aac2d8b2 | 10106 | STOP_POLLING; |
1af9f229 | 10107 | |
bd9d0f3f | 10108 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 10109 | { |
92a90e89 GM |
10110 | if (hscroll_windows (selected_window)) |
10111 | goto retry; | |
2311178e | 10112 | |
5f5c8ee5 | 10113 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 10114 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 10115 | } |
d724d989 | 10116 | |
8de2d90b | 10117 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
10118 | function. If the echo area is on another frame, that may |
10119 | have put text on a frame other than the selected one, so the | |
10120 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 10121 | it here. */ |
bd9d0f3f GM |
10122 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
10123 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
2311178e | 10124 | |
bd9d0f3f GM |
10125 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
10126 | { | |
10127 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
10128 | pause |= update_frame (mini_frame, 0, 0); | |
10129 | if (!pause && hscroll_windows (mini_window)) | |
10130 | goto retry; | |
10131 | } | |
6e8290aa | 10132 | } |
a2889657 | 10133 | |
5f5c8ee5 GM |
10134 | /* If display was paused because of pending input, make sure we do a |
10135 | thorough update the next time. */ | |
a2889657 JB |
10136 | if (pause) |
10137 | { | |
5f5c8ee5 GM |
10138 | /* Prevent the optimization at the beginning of |
10139 | redisplay_internal that tries a single-line update of the | |
10140 | line containing the cursor in the selected window. */ | |
10141 | CHARPOS (this_line_start_pos) = 0; | |
10142 | ||
10143 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 10144 | if (!NILP (last_arrow_position)) |
a2889657 JB |
10145 | { |
10146 | last_arrow_position = Qt; | |
10147 | last_arrow_string = Qt; | |
10148 | } | |
2311178e | 10149 | |
5f5c8ee5 GM |
10150 | /* If we pause after scrolling, some rows in the current |
10151 | matrices of some windows are not valid. */ | |
10152 | if (!WINDOW_FULL_WIDTH_P (w) | |
10153 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
10154 | update_mode_lines = 1; |
10155 | } | |
43c09969 | 10156 | else |
a2889657 | 10157 | { |
43c09969 | 10158 | if (!consider_all_windows_p) |
a2889657 | 10159 | { |
43c09969 GM |
10160 | /* This has already been done above if |
10161 | consider_all_windows_p is set. */ | |
10162 | mark_window_display_accurate_1 (w, 1); | |
2311178e | 10163 | |
927c5b3b GM |
10164 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
10165 | last_arrow_string = Voverlay_arrow_string; | |
2311178e | 10166 | |
efc63ef0 | 10167 | if (frame_up_to_date_hook != 0) |
43c09969 | 10168 | frame_up_to_date_hook (sf); |
a2889657 | 10169 | } |
15e26c76 | 10170 | |
a2889657 JB |
10171 | update_mode_lines = 0; |
10172 | windows_or_buffers_changed = 0; | |
5fb96e96 | 10173 | cursor_type_changed = 0; |
a2889657 JB |
10174 | } |
10175 | ||
5f5c8ee5 GM |
10176 | /* Start SIGIO interrupts coming again. Having them off during the |
10177 | code above makes it less likely one will discard output, but not | |
10178 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 10179 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
10180 | if (interrupt_input) |
10181 | request_sigio (); | |
aac2d8b2 | 10182 | RESUME_POLLING; |
a2889657 | 10183 | |
5f5c8ee5 GM |
10184 | /* If a frame has become visible which was not before, redisplay |
10185 | again, so that we display it. Expose events for such a frame | |
10186 | (which it gets when becoming visible) don't call the parts of | |
10187 | redisplay constructing glyphs, so simply exposing a frame won't | |
10188 | display anything in this case. So, we have to display these | |
10189 | frames here explicitly. */ | |
11c52c4f RS |
10190 | if (!pause) |
10191 | { | |
10192 | Lisp_Object tail, frame; | |
10193 | int new_count = 0; | |
10194 | ||
10195 | FOR_EACH_FRAME (tail, frame) | |
10196 | { | |
10197 | int this_is_visible = 0; | |
8e83f802 RS |
10198 | |
10199 | if (XFRAME (frame)->visible) | |
10200 | this_is_visible = 1; | |
10201 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
10202 | if (XFRAME (frame)->visible) | |
10203 | this_is_visible = 1; | |
11c52c4f RS |
10204 | |
10205 | if (this_is_visible) | |
10206 | new_count++; | |
10207 | } | |
10208 | ||
89819bdd | 10209 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
10210 | windows_or_buffers_changed++; |
10211 | } | |
10212 | ||
44fa5b1e | 10213 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 10214 | do_pending_window_change (1); |
d8e242fd | 10215 | |
8b32d885 RS |
10216 | /* If we just did a pending size change, or have additional |
10217 | visible frames, redisplay again. */ | |
3c8c72e0 | 10218 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 10219 | goto retry; |
5f5c8ee5 | 10220 | |
1987b083 | 10221 | end_of_redisplay: |
28514cd9 | 10222 | unbind_to (count, Qnil); |
aac2d8b2 | 10223 | RESUME_POLLING; |
a2889657 JB |
10224 | } |
10225 | ||
5f5c8ee5 GM |
10226 | |
10227 | /* Redisplay, but leave alone any recent echo area message unless | |
10228 | another message has been requested in its place. | |
a2889657 JB |
10229 | |
10230 | This is useful in situations where you need to redisplay but no | |
10231 | user action has occurred, making it inappropriate for the message | |
10232 | area to be cleared. See tracking_off and | |
9bf76936 GM |
10233 | wait_reading_process_input for examples of these situations. |
10234 | ||
10235 | FROM_WHERE is an integer saying from where this function was | |
10236 | called. This is useful for debugging. */ | |
a2889657 | 10237 | |
8991bb31 | 10238 | void |
9bf76936 GM |
10239 | redisplay_preserve_echo_area (from_where) |
10240 | int from_where; | |
a2889657 | 10241 | { |
9bf76936 GM |
10242 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
10243 | ||
c6e89d6c | 10244 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 10245 | { |
c6e89d6c GM |
10246 | /* We have a previously displayed message, but no current |
10247 | message. Redisplay the previous message. */ | |
10248 | display_last_displayed_message_p = 1; | |
e9874cee | 10249 | redisplay_internal (1); |
c6e89d6c | 10250 | display_last_displayed_message_p = 0; |
a2889657 JB |
10251 | } |
10252 | else | |
e9874cee | 10253 | redisplay_internal (1); |
a2889657 JB |
10254 | } |
10255 | ||
5f5c8ee5 | 10256 | |
28514cd9 | 10257 | /* Function registered with record_unwind_protect in |
acfca545 RS |
10258 | redisplay_internal. Reset redisplaying_p to the value it had |
10259 | before redisplay_internal was called, and clear | |
26683087 | 10260 | prevent_freeing_realized_faces_p. */ |
28514cd9 GM |
10261 | |
10262 | static Lisp_Object | |
10263 | unwind_redisplay (old_redisplaying_p) | |
10264 | Lisp_Object old_redisplaying_p; | |
10265 | { | |
10266 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 10267 | return Qnil; |
28514cd9 GM |
10268 | } |
10269 | ||
10270 | ||
43c09969 GM |
10271 | /* Mark the display of window W as accurate or inaccurate. If |
10272 | ACCURATE_P is non-zero mark display of W as accurate. If | |
10273 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
10274 | redisplay_internal is called. */ | |
5f5c8ee5 | 10275 | |
43c09969 GM |
10276 | static void |
10277 | mark_window_display_accurate_1 (w, accurate_p) | |
10278 | struct window *w; | |
5f5c8ee5 | 10279 | int accurate_p; |
a2889657 | 10280 | { |
43c09969 | 10281 | if (BUFFERP (w->buffer)) |
a2889657 | 10282 | { |
43c09969 | 10283 | struct buffer *b = XBUFFER (w->buffer); |
2311178e | 10284 | |
43c09969 GM |
10285 | w->last_modified |
10286 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
10287 | w->last_overlay_modified | |
10288 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
10289 | w->last_had_star | |
10290 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 10291 | |
43c09969 | 10292 | if (accurate_p) |
bd66d1ba | 10293 | { |
43c09969 GM |
10294 | b->clip_changed = 0; |
10295 | b->prevent_redisplay_optimizations_p = 0; | |
10296 | ||
10297 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
10298 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
10299 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
10300 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
2311178e | 10301 | |
43c09969 GM |
10302 | w->current_matrix->buffer = b; |
10303 | w->current_matrix->begv = BUF_BEGV (b); | |
10304 | w->current_matrix->zv = BUF_ZV (b); | |
2311178e | 10305 | |
43c09969 GM |
10306 | w->last_cursor = w->cursor; |
10307 | w->last_cursor_off_p = w->cursor_off_p; | |
2311178e | 10308 | |
43c09969 GM |
10309 | if (w == XWINDOW (selected_window)) |
10310 | w->last_point = make_number (BUF_PT (b)); | |
10311 | else | |
10312 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 10313 | } |
43c09969 | 10314 | } |
bd66d1ba | 10315 | |
43c09969 GM |
10316 | if (accurate_p) |
10317 | { | |
d2f84654 | 10318 | w->window_end_valid = w->buffer; |
99332eb6 | 10319 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 | 10320 | xassert (XINT (w->window_end_vpos) |
da8b7f4f | 10321 | < (WINDOW_TOTAL_LINES (w) |
2913a9c0 | 10322 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); |
99332eb6 | 10323 | #endif |
a2889657 | 10324 | w->update_mode_line = Qnil; |
43c09969 GM |
10325 | } |
10326 | } | |
10327 | ||
10328 | ||
10329 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
10330 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
10331 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
10332 | be redisplayed the next time redisplay_internal is called. */ | |
10333 | ||
10334 | void | |
10335 | mark_window_display_accurate (window, accurate_p) | |
10336 | Lisp_Object window; | |
10337 | int accurate_p; | |
10338 | { | |
10339 | struct window *w; | |
2311178e | 10340 | |
43c09969 GM |
10341 | for (; !NILP (window); window = w->next) |
10342 | { | |
10343 | w = XWINDOW (window); | |
10344 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 10345 | |
265a9e55 | 10346 | if (!NILP (w->vchild)) |
5f5c8ee5 | 10347 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 10348 | if (!NILP (w->hchild)) |
5f5c8ee5 | 10349 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
10350 | } |
10351 | ||
5f5c8ee5 | 10352 | if (accurate_p) |
a2889657 | 10353 | { |
d45de95b | 10354 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
10355 | last_arrow_string = Voverlay_arrow_string; |
10356 | } | |
10357 | else | |
10358 | { | |
5f5c8ee5 GM |
10359 | /* Force a thorough redisplay the next time by setting |
10360 | last_arrow_position and last_arrow_string to t, which is | |
4b41cebb | 10361 | unequal to any useful value of Voverlay_arrow_... */ |
a2889657 JB |
10362 | last_arrow_position = Qt; |
10363 | last_arrow_string = Qt; | |
10364 | } | |
10365 | } | |
5f5c8ee5 GM |
10366 | |
10367 | ||
10368 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
10369 | C. Since a display table doesn't have any parent, we don't have to | |
10370 | follow parent. Do not call this function directly but use the | |
10371 | macro DISP_CHAR_VECTOR. */ | |
10372 | ||
10373 | Lisp_Object | |
10374 | disp_char_vector (dp, c) | |
10375 | struct Lisp_Char_Table *dp; | |
10376 | int c; | |
10377 | { | |
10378 | int code[4], i; | |
10379 | Lisp_Object val; | |
10380 | ||
10381 | if (SINGLE_BYTE_CHAR_P (c)) | |
10382 | return (dp->contents[c]); | |
2311178e | 10383 | |
c5924f47 | 10384 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
10385 | if (code[1] < 32) |
10386 | code[1] = -1; | |
10387 | else if (code[2] < 32) | |
10388 | code[2] = -1; | |
2311178e | 10389 | |
5f5c8ee5 GM |
10390 | /* Here, the possible range of code[0] (== charset ID) is |
10391 | 128..max_charset. Since the top level char table contains data | |
10392 | for multibyte characters after 256th element, we must increment | |
10393 | code[0] by 128 to get a correct index. */ | |
10394 | code[0] += 128; | |
10395 | code[3] = -1; /* anchor */ | |
10396 | ||
10397 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
10398 | { | |
10399 | val = dp->contents[code[i]]; | |
10400 | if (!SUB_CHAR_TABLE_P (val)) | |
10401 | return (NILP (val) ? dp->defalt : val); | |
10402 | } | |
2311178e | 10403 | |
5f5c8ee5 GM |
10404 | /* Here, val is a sub char table. We return the default value of |
10405 | it. */ | |
10406 | return (dp->defalt); | |
10407 | } | |
10408 | ||
10409 | ||
a2889657 | 10410 | \f |
5f5c8ee5 GM |
10411 | /*********************************************************************** |
10412 | Window Redisplay | |
10413 | ***********************************************************************/ | |
a2725ab2 | 10414 | |
5f5c8ee5 | 10415 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
10416 | |
10417 | static void | |
5f5c8ee5 GM |
10418 | redisplay_windows (window) |
10419 | Lisp_Object window; | |
90adcf20 | 10420 | { |
5f5c8ee5 GM |
10421 | while (!NILP (window)) |
10422 | { | |
10423 | struct window *w = XWINDOW (window); | |
2311178e | 10424 | |
5f5c8ee5 GM |
10425 | if (!NILP (w->hchild)) |
10426 | redisplay_windows (w->hchild); | |
10427 | else if (!NILP (w->vchild)) | |
10428 | redisplay_windows (w->vchild); | |
10429 | else | |
82a7ab23 RS |
10430 | { |
10431 | displayed_buffer = XBUFFER (w->buffer); | |
7033d6df RS |
10432 | /* Use list_of_error, not Qerror, so that |
10433 | we catch only errors and don't run the debugger. */ | |
2311178e | 10434 | internal_condition_case_1 (redisplay_window_0, window, |
7033d6df | 10435 | list_of_error, |
82a7ab23 RS |
10436 | redisplay_window_error); |
10437 | } | |
a2725ab2 | 10438 | |
5f5c8ee5 GM |
10439 | window = w->next; |
10440 | } | |
10441 | } | |
10442 | ||
82a7ab23 RS |
10443 | static Lisp_Object |
10444 | redisplay_window_error () | |
10445 | { | |
10446 | displayed_buffer->display_error_modiff = BUF_MODIFF (displayed_buffer); | |
10447 | return Qnil; | |
10448 | } | |
10449 | ||
10450 | static Lisp_Object | |
10451 | redisplay_window_0 (window) | |
10452 | Lisp_Object window; | |
10453 | { | |
10454 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
10455 | redisplay_window (window, 0); | |
10456 | return Qnil; | |
10457 | } | |
5f5c8ee5 | 10458 | |
82a7ab23 RS |
10459 | static Lisp_Object |
10460 | redisplay_window_1 (window) | |
10461 | Lisp_Object window; | |
10462 | { | |
10463 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
10464 | redisplay_window (window, 1); | |
10465 | return Qnil; | |
10466 | } | |
10467 | \f | |
bc6371a6 KH |
10468 | |
10469 | /* Increment GLYPH until it reaches END or CONDITION fails while | |
10470 | adding (GLYPH)->pixel_width to X. */ | |
10471 | ||
10472 | #define SKIP_GLYPHS(glyph, end, x, condition) \ | |
10473 | do \ | |
10474 | { \ | |
10475 | (x) += (glyph)->pixel_width; \ | |
10476 | ++(glyph); \ | |
10477 | } \ | |
10478 | while ((glyph) < (end) && (condition)) | |
10479 | ||
10480 | ||
5f5c8ee5 GM |
10481 | /* Set cursor position of W. PT is assumed to be displayed in ROW. |
10482 | DELTA is the number of bytes by which positions recorded in ROW | |
10483 | differ from current buffer positions. */ | |
10484 | ||
10485 | void | |
10486 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
10487 | struct window *w; | |
10488 | struct glyph_row *row; | |
10489 | struct glyph_matrix *matrix; | |
10490 | int delta, delta_bytes, dy, dvpos; | |
10491 | { | |
10492 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
10493 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
ae73dc1c KH |
10494 | /* The first glyph that starts a sequence of glyphs from string. */ |
10495 | struct glyph *string_start; | |
10496 | /* The X coordinate of string_start. */ | |
10497 | int string_start_x; | |
10498 | /* The last known character position. */ | |
10499 | int last_pos = MATRIX_ROW_START_CHARPOS (row) + delta; | |
10500 | /* The last known character position before string_start. */ | |
10501 | int string_before_pos; | |
5f5c8ee5 GM |
10502 | int x = row->x; |
10503 | int pt_old = PT - delta; | |
10504 | ||
10505 | /* Skip over glyphs not having an object at the start of the row. | |
10506 | These are special glyphs like truncation marks on terminal | |
10507 | frames. */ | |
10508 | if (row->displays_text_p) | |
10509 | while (glyph < end | |
6fc556fd | 10510 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
10511 | && glyph->charpos < 0) |
10512 | { | |
10513 | x += glyph->pixel_width; | |
10514 | ++glyph; | |
10515 | } | |
10516 | ||
ae73dc1c | 10517 | string_start = NULL; |
5f5c8ee5 | 10518 | while (glyph < end |
6fc556fd | 10519 | && !INTEGERP (glyph->object) |
5f5c8ee5 | 10520 | && (!BUFFERP (glyph->object) |
ae73dc1c | 10521 | || (last_pos = glyph->charpos) < pt_old)) |
5f5c8ee5 | 10522 | { |
ae73dc1c KH |
10523 | if (! STRINGP (glyph->object)) |
10524 | { | |
10525 | string_start = NULL; | |
10526 | x += glyph->pixel_width; | |
10527 | ++glyph; | |
10528 | } | |
10529 | else | |
10530 | { | |
10531 | string_before_pos = last_pos; | |
10532 | string_start = glyph; | |
10533 | string_start_x = x; | |
10534 | /* Skip all glyphs from string. */ | |
bc6371a6 | 10535 | SKIP_GLYPHS (glyph, end, x, STRINGP (glyph->object)); |
ae73dc1c KH |
10536 | } |
10537 | } | |
10538 | ||
10539 | if (string_start | |
10540 | && (glyph == end || !BUFFERP (glyph->object) || last_pos > pt_old)) | |
10541 | { | |
10542 | /* We may have skipped over point because the previous glyphs | |
10543 | are from string. As there's no easy way to know the | |
10544 | character position of the current glyph, find the correct | |
10545 | glyph on point by scanning from string_start again. */ | |
bc6371a6 KH |
10546 | Lisp_Object limit; |
10547 | Lisp_Object string; | |
10548 | int pos; | |
ae73dc1c | 10549 | |
bc6371a6 KH |
10550 | limit = make_number (pt_old + 1); |
10551 | end = glyph; | |
ae73dc1c KH |
10552 | glyph = string_start; |
10553 | x = string_start_x; | |
bc6371a6 KH |
10554 | string = glyph->object; |
10555 | pos = string_buffer_position (w, string, string_before_pos); | |
10556 | /* If STRING is from overlay, LAST_POS == 0. We skip such glyphs | |
10557 | because we always put cursor after overlay strings. */ | |
10558 | while (pos == 0 && glyph < end) | |
ae73dc1c | 10559 | { |
bc6371a6 KH |
10560 | string = glyph->object; |
10561 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
10562 | if (glyph < end) | |
10563 | pos = string_buffer_position (w, glyph->object, string_before_pos); | |
10564 | } | |
10565 | ||
10566 | while (glyph < end) | |
10567 | { | |
10568 | pos = XINT (Fnext_single_char_property_change | |
10569 | (make_number (pos), Qdisplay, Qnil, limit)); | |
10570 | if (pos > pt_old) | |
10571 | break; | |
ae73dc1c | 10572 | /* Skip glyphs from the same string. */ |
bc6371a6 KH |
10573 | string = glyph->object; |
10574 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
10575 | /* Skip glyphs from an overlay. */ | |
10576 | while (glyph < end | |
10577 | && ! string_buffer_position (w, glyph->object, pos)) | |
ae73dc1c | 10578 | { |
bc6371a6 KH |
10579 | string = glyph->object; |
10580 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
ae73dc1c | 10581 | } |
ae73dc1c | 10582 | } |
5f5c8ee5 GM |
10583 | } |
10584 | ||
10585 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
10586 | w->cursor.x = x; | |
10587 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
10588 | w->cursor.y = row->y + dy; | |
10589 | ||
10590 | if (w == XWINDOW (selected_window)) | |
10591 | { | |
10592 | if (!row->continued_p | |
10593 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
10594 | && row->x == 0) | |
10595 | { | |
10596 | this_line_buffer = XBUFFER (w->buffer); | |
2311178e | 10597 | |
5f5c8ee5 GM |
10598 | CHARPOS (this_line_start_pos) |
10599 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
10600 | BYTEPOS (this_line_start_pos) | |
10601 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
2311178e | 10602 | |
5f5c8ee5 GM |
10603 | CHARPOS (this_line_end_pos) |
10604 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
10605 | BYTEPOS (this_line_end_pos) | |
10606 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
2311178e | 10607 | |
5f5c8ee5 GM |
10608 | this_line_y = w->cursor.y; |
10609 | this_line_pixel_height = row->height; | |
10610 | this_line_vpos = w->cursor.vpos; | |
10611 | this_line_start_x = row->x; | |
10612 | } | |
10613 | else | |
10614 | CHARPOS (this_line_start_pos) = 0; | |
10615 | } | |
10616 | } | |
10617 | ||
10618 | ||
10619 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
10620 | start STARTP. Sets the window start of WINDOW to that position. |
10621 | ||
10622 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
10623 | |
10624 | static INLINE struct text_pos | |
10625 | run_window_scroll_functions (window, startp) | |
10626 | Lisp_Object window; | |
10627 | struct text_pos startp; | |
10628 | { | |
10629 | struct window *w = XWINDOW (window); | |
10630 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
10631 | |
10632 | if (current_buffer != XBUFFER (w->buffer)) | |
10633 | abort (); | |
10634 | ||
5f5c8ee5 GM |
10635 | if (!NILP (Vwindow_scroll_functions)) |
10636 | { | |
2311178e | 10637 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
5f5c8ee5 GM |
10638 | make_number (CHARPOS (startp))); |
10639 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
10640 | /* In case the hook functions switch buffers. */ |
10641 | if (current_buffer != XBUFFER (w->buffer)) | |
10642 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 10643 | } |
90adcf20 | 10644 | |
5f5c8ee5 GM |
10645 | return startp; |
10646 | } | |
10647 | ||
10648 | ||
ddf6b9a3 RS |
10649 | /* Make sure the line containing the cursor is fully visible. |
10650 | A value of 1 means there is nothing to be done. | |
10651 | (Either the line is fully visible, or it cannot be made so, | |
10652 | or we cannot tell.) | |
10653 | A value of 0 means the caller should do scrolling | |
10654 | as if point had gone off the screen. */ | |
5f5c8ee5 | 10655 | |
cb617e7c | 10656 | static int |
5f5c8ee5 GM |
10657 | make_cursor_line_fully_visible (w) |
10658 | struct window *w; | |
10659 | { | |
10660 | struct glyph_matrix *matrix; | |
10661 | struct glyph_row *row; | |
478d746b | 10662 | int window_height; |
2311178e | 10663 | |
5f5c8ee5 GM |
10664 | /* It's not always possible to find the cursor, e.g, when a window |
10665 | is full of overlay strings. Don't do anything in that case. */ | |
10666 | if (w->cursor.vpos < 0) | |
cb617e7c | 10667 | return 1; |
2311178e | 10668 | |
5f5c8ee5 GM |
10669 | matrix = w->desired_matrix; |
10670 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
10671 | ||
acda20e1 | 10672 | /* If the cursor row is not partially visible, there's nothing to do. */ |
b28cb6ed | 10673 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
cb617e7c | 10674 | return 1; |
b28cb6ed GM |
10675 | |
10676 | /* If the row the cursor is in is taller than the window's height, | |
10677 | it's not clear what to do, so do nothing. */ | |
10678 | window_height = window_box_height (w); | |
10679 | if (row->height >= window_height) | |
cb617e7c | 10680 | return 1; |
b28cb6ed | 10681 | |
ddf6b9a3 RS |
10682 | return 0; |
10683 | ||
10684 | #if 0 | |
10685 | /* This code used to try to scroll the window just enough to make | |
10686 | the line visible. It returned 0 to say that the caller should | |
10687 | allocate larger glyph matrices. */ | |
10688 | ||
b28cb6ed | 10689 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) |
5f5c8ee5 GM |
10690 | { |
10691 | int dy = row->height - row->visible_height; | |
10692 | w->vscroll = 0; | |
10693 | w->cursor.y += dy; | |
10694 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
10695 | } | |
b28cb6ed | 10696 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
10697 | { |
10698 | int dy = - (row->height - row->visible_height); | |
10699 | w->vscroll = dy; | |
10700 | w->cursor.y += dy; | |
10701 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
10702 | } | |
2311178e | 10703 | |
5f5c8ee5 GM |
10704 | /* When we change the cursor y-position of the selected window, |
10705 | change this_line_y as well so that the display optimization for | |
10706 | the cursor line of the selected window in redisplay_internal uses | |
10707 | the correct y-position. */ | |
10708 | if (w == XWINDOW (selected_window)) | |
10709 | this_line_y = w->cursor.y; | |
cb617e7c GM |
10710 | |
10711 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
10712 | redisplay with larger matrices. */ | |
10713 | if (matrix->nrows < required_matrix_height (w)) | |
10714 | { | |
10715 | fonts_changed_p = 1; | |
10716 | return 0; | |
10717 | } | |
10718 | ||
10719 | return 1; | |
ddf6b9a3 | 10720 | #endif /* 0 */ |
5f5c8ee5 GM |
10721 | } |
10722 | ||
10723 | ||
10724 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
10725 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
10726 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
10727 | in redisplay_window to bring a partially visible line into view in | |
10728 | the case that only the cursor has moved. | |
10729 | ||
03b0a4b4 RS |
10730 | LAST_LINE_MISFIT should be nonzero if we're scrolling because the |
10731 | last screen line's vertical height extends past the end of the screen. | |
10732 | ||
5f5c8ee5 GM |
10733 | Value is |
10734 | ||
10735 | 1 if scrolling succeeded | |
2311178e | 10736 | |
5f5c8ee5 | 10737 | 0 if scrolling didn't find point. |
2311178e | 10738 | |
5f5c8ee5 GM |
10739 | -1 if new fonts have been loaded so that we must interrupt |
10740 | redisplay, adjust glyph matrices, and try again. */ | |
10741 | ||
cb617e7c GM |
10742 | enum |
10743 | { | |
10744 | SCROLLING_SUCCESS, | |
10745 | SCROLLING_FAILED, | |
10746 | SCROLLING_NEED_LARGER_MATRICES | |
10747 | }; | |
10748 | ||
5f5c8ee5 GM |
10749 | static int |
10750 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
03b0a4b4 | 10751 | scroll_step, temp_scroll_step, last_line_misfit) |
5f5c8ee5 GM |
10752 | Lisp_Object window; |
10753 | int just_this_one_p; | |
31ade731 | 10754 | EMACS_INT scroll_conservatively, scroll_step; |
5f5c8ee5 | 10755 | int temp_scroll_step; |
03b0a4b4 | 10756 | int last_line_misfit; |
5f5c8ee5 GM |
10757 | { |
10758 | struct window *w = XWINDOW (window); | |
10759 | struct frame *f = XFRAME (w->frame); | |
10760 | struct text_pos scroll_margin_pos; | |
10761 | struct text_pos pos; | |
10762 | struct text_pos startp; | |
10763 | struct it it; | |
10764 | Lisp_Object window_end; | |
10765 | int this_scroll_margin; | |
10766 | int dy = 0; | |
10767 | int scroll_max; | |
b8a63ccb | 10768 | int rc; |
5f5c8ee5 GM |
10769 | int amount_to_scroll = 0; |
10770 | Lisp_Object aggressive; | |
10771 | int height; | |
03b0a4b4 | 10772 | int end_scroll_margin; |
5f5c8ee5 GM |
10773 | |
10774 | #if GLYPH_DEBUG | |
10775 | debug_method_add (w, "try_scrolling"); | |
78614721 | 10776 | #endif |
5f5c8ee5 GM |
10777 | |
10778 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
2311178e | 10779 | |
5f5c8ee5 GM |
10780 | /* Compute scroll margin height in pixels. We scroll when point is |
10781 | within this distance from the top or bottom of the window. */ | |
10782 | if (scroll_margin > 0) | |
90adcf20 | 10783 | { |
da8b7f4f KS |
10784 | this_scroll_margin = min (scroll_margin, WINDOW_TOTAL_LINES (w) / 4); |
10785 | this_scroll_margin *= FRAME_LINE_HEIGHT (f); | |
5f5c8ee5 GM |
10786 | } |
10787 | else | |
10788 | this_scroll_margin = 0; | |
10789 | ||
10790 | /* Compute how much we should try to scroll maximally to bring point | |
10791 | into view. */ | |
0894e696 SM |
10792 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
10793 | scroll_max = max (scroll_step, | |
10794 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
10795 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
10796 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
10797 | /* We're trying to scroll because of aggressive scrolling | |
10798 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
10799 | there should be a variable for this. */ | |
10800 | scroll_max = 10; | |
10801 | else | |
10802 | scroll_max = 0; | |
da8b7f4f | 10803 | scroll_max *= FRAME_LINE_HEIGHT (f); |
5f5c8ee5 GM |
10804 | |
10805 | /* Decide whether we have to scroll down. Start at the window end | |
10806 | and move this_scroll_margin up to find the position of the scroll | |
10807 | margin. */ | |
10808 | window_end = Fwindow_end (window, Qt); | |
03b0a4b4 RS |
10809 | |
10810 | too_near_end: | |
10811 | ||
5f5c8ee5 GM |
10812 | CHARPOS (scroll_margin_pos) = XINT (window_end); |
10813 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
03b0a4b4 RS |
10814 | |
10815 | end_scroll_margin = this_scroll_margin + !!last_line_misfit; | |
10816 | if (end_scroll_margin) | |
5f5c8ee5 GM |
10817 | { |
10818 | start_display (&it, w, scroll_margin_pos); | |
03b0a4b4 | 10819 | move_it_vertically (&it, - end_scroll_margin); |
5f5c8ee5 GM |
10820 | scroll_margin_pos = it.current.pos; |
10821 | } | |
10822 | ||
10823 | if (PT >= CHARPOS (scroll_margin_pos)) | |
10824 | { | |
10825 | int y0; | |
2311178e | 10826 | |
5f5c8ee5 GM |
10827 | /* Point is in the scroll margin at the bottom of the window, or |
10828 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 10829 | |
5f5c8ee5 GM |
10830 | /* Compute the distance from the scroll margin to PT. |
10831 | Give up if the distance is greater than scroll_max. */ | |
10832 | start_display (&it, w, scroll_margin_pos); | |
10833 | y0 = it.current_y; | |
10834 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10835 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
539e92ad GM |
10836 | |
10837 | /* To make point visible, we have to move the window start | |
10838 | down so that the line the cursor is in is visible, which | |
10839 | means we have to add in the height of the cursor line. */ | |
10840 | dy = line_bottom_y (&it) - y0; | |
2311178e | 10841 | |
5f5c8ee5 | 10842 | if (dy > scroll_max) |
cb617e7c | 10843 | return SCROLLING_FAILED; |
2311178e | 10844 | |
5f5c8ee5 GM |
10845 | /* Move the window start down. If scrolling conservatively, |
10846 | move it just enough down to make point visible. If | |
10847 | scroll_step is set, move it down by scroll_step. */ | |
10848 | start_display (&it, w, startp); | |
10849 | ||
10850 | if (scroll_conservatively) | |
03b0a4b4 RS |
10851 | /* Set AMOUNT_TO_SCROLL to at least one line, |
10852 | and at most scroll_conservatively lines. */ | |
e89aaabd | 10853 | amount_to_scroll |
da8b7f4f KS |
10854 | = min (max (dy, FRAME_LINE_HEIGHT (f)), |
10855 | FRAME_LINE_HEIGHT (f) * scroll_conservatively); | |
5f5c8ee5 GM |
10856 | else if (scroll_step || temp_scroll_step) |
10857 | amount_to_scroll = scroll_max; | |
10858 | else | |
90adcf20 | 10859 | { |
46226c1d | 10860 | aggressive = current_buffer->scroll_up_aggressively; |
da8b7f4f | 10861 | height = WINDOW_BOX_TEXT_HEIGHT (w); |
5f5c8ee5 GM |
10862 | if (NUMBERP (aggressive)) |
10863 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
10864 | } | |
a2725ab2 | 10865 | |
5f5c8ee5 | 10866 | if (amount_to_scroll <= 0) |
cb617e7c | 10867 | return SCROLLING_FAILED; |
a2725ab2 | 10868 | |
03b0a4b4 RS |
10869 | /* If moving by amount_to_scroll leaves STARTP unchanged, |
10870 | move it down one screen line. */ | |
10871 | ||
5f5c8ee5 | 10872 | move_it_vertically (&it, amount_to_scroll); |
03b0a4b4 RS |
10873 | if (CHARPOS (it.current.pos) == CHARPOS (startp)) |
10874 | move_it_by_lines (&it, 1, 1); | |
5f5c8ee5 GM |
10875 | startp = it.current.pos; |
10876 | } | |
10877 | else | |
10878 | { | |
10879 | /* See if point is inside the scroll margin at the top of the | |
10880 | window. */ | |
10881 | scroll_margin_pos = startp; | |
10882 | if (this_scroll_margin) | |
10883 | { | |
10884 | start_display (&it, w, startp); | |
10885 | move_it_vertically (&it, this_scroll_margin); | |
10886 | scroll_margin_pos = it.current.pos; | |
10887 | } | |
10888 | ||
10889 | if (PT < CHARPOS (scroll_margin_pos)) | |
10890 | { | |
10891 | /* Point is in the scroll margin at the top of the window or | |
10892 | above what is displayed in the window. */ | |
10893 | int y0; | |
2311178e | 10894 | |
5f5c8ee5 GM |
10895 | /* Compute the vertical distance from PT to the scroll |
10896 | margin position. Give up if distance is greater than | |
10897 | scroll_max. */ | |
10898 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
10899 | start_display (&it, w, pos); | |
10900 | y0 = it.current_y; | |
10901 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
10902 | it.last_visible_y, -1, | |
10903 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10904 | dy = it.current_y - y0; | |
10905 | if (dy > scroll_max) | |
cb617e7c | 10906 | return SCROLLING_FAILED; |
2311178e | 10907 | |
5f5c8ee5 GM |
10908 | /* Compute new window start. */ |
10909 | start_display (&it, w, startp); | |
2311178e | 10910 | |
5f5c8ee5 | 10911 | if (scroll_conservatively) |
0894e696 | 10912 | amount_to_scroll = |
da8b7f4f | 10913 | max (dy, FRAME_LINE_HEIGHT (f) * max (scroll_step, temp_scroll_step)); |
5f5c8ee5 GM |
10914 | else if (scroll_step || temp_scroll_step) |
10915 | amount_to_scroll = scroll_max; | |
538f13d4 | 10916 | else |
5f5c8ee5 | 10917 | { |
46226c1d | 10918 | aggressive = current_buffer->scroll_down_aggressively; |
da8b7f4f | 10919 | height = WINDOW_BOX_TEXT_HEIGHT (w); |
5f5c8ee5 GM |
10920 | if (NUMBERP (aggressive)) |
10921 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
10922 | } | |
a2725ab2 | 10923 | |
5f5c8ee5 | 10924 | if (amount_to_scroll <= 0) |
cb617e7c | 10925 | return SCROLLING_FAILED; |
2311178e | 10926 | |
5f5c8ee5 GM |
10927 | move_it_vertically (&it, - amount_to_scroll); |
10928 | startp = it.current.pos; | |
90adcf20 RS |
10929 | } |
10930 | } | |
a2889657 | 10931 | |
5f5c8ee5 GM |
10932 | /* Run window scroll functions. */ |
10933 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 10934 | |
5f5c8ee5 GM |
10935 | /* Display the window. Give up if new fonts are loaded, or if point |
10936 | doesn't appear. */ | |
10937 | if (!try_window (window, startp)) | |
cb617e7c | 10938 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
10939 | else if (w->cursor.vpos < 0) |
10940 | { | |
10941 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 10942 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
10943 | } |
10944 | else | |
10945 | { | |
10946 | /* Maybe forget recorded base line for line number display. */ | |
2311178e | 10947 | if (!just_this_one_p |
5f5c8ee5 | 10948 | || current_buffer->clip_changed |
9142dd5b | 10949 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 | 10950 | w->base_line_number = Qnil; |
2311178e | 10951 | |
ddf6b9a3 RS |
10952 | /* If cursor ends up on a partially visible line, |
10953 | treat that as being off the bottom of the screen. */ | |
10954 | if (! make_cursor_line_fully_visible (w)) | |
ef3c2c73 RS |
10955 | { |
10956 | clear_glyph_matrix (w->desired_matrix); | |
03b0a4b4 | 10957 | last_line_misfit = 1; |
ef3c2c73 RS |
10958 | goto too_near_end; |
10959 | } | |
ddf6b9a3 | 10960 | rc = SCROLLING_SUCCESS; |
5f5c8ee5 GM |
10961 | } |
10962 | ||
10963 | return rc; | |
a2889657 JB |
10964 | } |
10965 | ||
5f5c8ee5 GM |
10966 | |
10967 | /* Compute a suitable window start for window W if display of W starts | |
10968 | on a continuation line. Value is non-zero if a new window start | |
10969 | was computed. | |
10970 | ||
10971 | The new window start will be computed, based on W's width, starting | |
10972 | from the start of the continued line. It is the start of the | |
10973 | screen line with the minimum distance from the old start W->start. */ | |
10974 | ||
10975 | static int | |
10976 | compute_window_start_on_continuation_line (w) | |
10977 | struct window *w; | |
1f1ff51d | 10978 | { |
5f5c8ee5 GM |
10979 | struct text_pos pos, start_pos; |
10980 | int window_start_changed_p = 0; | |
1f1ff51d | 10981 | |
5f5c8ee5 | 10982 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 10983 | |
5f5c8ee5 | 10984 | /* If window start is on a continuation line... Window start may be |
2311178e | 10985 | < BEGV in case there's invisible text at the start of the |
5f5c8ee5 GM |
10986 | buffer (M-x rmail, for example). */ |
10987 | if (CHARPOS (start_pos) > BEGV | |
10988 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 10989 | { |
5f5c8ee5 GM |
10990 | struct it it; |
10991 | struct glyph_row *row; | |
f3751a65 GM |
10992 | |
10993 | /* Handle the case that the window start is out of range. */ | |
10994 | if (CHARPOS (start_pos) < BEGV) | |
10995 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
10996 | else if (CHARPOS (start_pos) > ZV) | |
10997 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
2311178e | 10998 | |
5f5c8ee5 GM |
10999 | /* Find the start of the continued line. This should be fast |
11000 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 11001 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
11002 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
11003 | row, DEFAULT_FACE_ID); | |
11004 | reseat_at_previous_visible_line_start (&it); | |
11005 | ||
11006 | /* If the line start is "too far" away from the window start, | |
11007 | say it takes too much time to compute a new window start. */ | |
11008 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
da8b7f4f | 11009 | < WINDOW_TOTAL_LINES (w) * WINDOW_TOTAL_COLS (w)) |
5f5c8ee5 GM |
11010 | { |
11011 | int min_distance, distance; | |
2311178e | 11012 | |
5f5c8ee5 GM |
11013 | /* Move forward by display lines to find the new window |
11014 | start. If window width was enlarged, the new start can | |
11015 | be expected to be > the old start. If window width was | |
11016 | decreased, the new window start will be < the old start. | |
11017 | So, we're looking for the display line start with the | |
11018 | minimum distance from the old window start. */ | |
11019 | pos = it.current.pos; | |
11020 | min_distance = INFINITY; | |
11021 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
11022 | distance < min_distance) | |
11023 | { | |
11024 | min_distance = distance; | |
11025 | pos = it.current.pos; | |
11026 | move_it_by_lines (&it, 1, 0); | |
11027 | } | |
2311178e | 11028 | |
5f5c8ee5 GM |
11029 | /* Set the window start there. */ |
11030 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
11031 | window_start_changed_p = 1; | |
11032 | } | |
1f1ff51d | 11033 | } |
2311178e | 11034 | |
5f5c8ee5 | 11035 | return window_start_changed_p; |
1f1ff51d KH |
11036 | } |
11037 | ||
5f5c8ee5 | 11038 | |
1dd5768b | 11039 | /* Try cursor movement in case text has not changed in window WINDOW, |
47589c8c GM |
11040 | with window start STARTP. Value is |
11041 | ||
cb617e7c | 11042 | CURSOR_MOVEMENT_SUCCESS if successful |
2311178e | 11043 | |
cb617e7c GM |
11044 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
11045 | ||
11046 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
11047 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
11048 | we want to scroll as if scroll-step were set to 1. See the code. | |
11049 | ||
11050 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
11051 | which case we have to abort this redisplay, and adjust matrices | |
11052 | first. */ | |
11053 | ||
2311178e | 11054 | enum |
cb617e7c GM |
11055 | { |
11056 | CURSOR_MOVEMENT_SUCCESS, | |
11057 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
11058 | CURSOR_MOVEMENT_MUST_SCROLL, | |
11059 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
11060 | }; | |
47589c8c GM |
11061 | |
11062 | static int | |
11063 | try_cursor_movement (window, startp, scroll_step) | |
11064 | Lisp_Object window; | |
11065 | struct text_pos startp; | |
11066 | int *scroll_step; | |
11067 | { | |
11068 | struct window *w = XWINDOW (window); | |
11069 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 11070 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
2311178e | 11071 | |
69d1f7c9 | 11072 | #if GLYPH_DEBUG |
76cb5e06 GM |
11073 | if (inhibit_try_cursor_movement) |
11074 | return rc; | |
11075 | #endif | |
11076 | ||
47589c8c GM |
11077 | /* Handle case where text has not changed, only point, and it has |
11078 | not moved off the frame. */ | |
11079 | if (/* Point may be in this window. */ | |
11080 | PT >= CHARPOS (startp) | |
47589c8c GM |
11081 | /* Selective display hasn't changed. */ |
11082 | && !current_buffer->clip_changed | |
4db87380 GM |
11083 | /* Function force-mode-line-update is used to force a thorough |
11084 | redisplay. It sets either windows_or_buffers_changed or | |
11085 | update_mode_lines. So don't take a shortcut here for these | |
11086 | cases. */ | |
11087 | && !update_mode_lines | |
11088 | && !windows_or_buffers_changed | |
5fb96e96 | 11089 | && !cursor_type_changed |
2311178e | 11090 | /* Can't use this case if highlighting a region. When a |
47589c8c GM |
11091 | region exists, cursor movement has to do more than just |
11092 | set the cursor. */ | |
11093 | && !(!NILP (Vtransient_mark_mode) | |
11094 | && !NILP (current_buffer->mark_active)) | |
11095 | && NILP (w->region_showing) | |
11096 | && NILP (Vshow_trailing_whitespace) | |
11097 | /* Right after splitting windows, last_point may be nil. */ | |
11098 | && INTEGERP (w->last_point) | |
11099 | /* This code is not used for mini-buffer for the sake of the case | |
11100 | of redisplaying to replace an echo area message; since in | |
11101 | that case the mini-buffer contents per se are usually | |
11102 | unchanged. This code is of no real use in the mini-buffer | |
11103 | since the handling of this_line_start_pos, etc., in redisplay | |
11104 | handles the same cases. */ | |
11105 | && !EQ (window, minibuf_window) | |
11106 | /* When splitting windows or for new windows, it happens that | |
11107 | redisplay is called with a nil window_end_vpos or one being | |
11108 | larger than the window. This should really be fixed in | |
11109 | window.c. I don't have this on my list, now, so we do | |
11110 | approximately the same as the old redisplay code. --gerd. */ | |
11111 | && INTEGERP (w->window_end_vpos) | |
11112 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
11113 | && (FRAME_WINDOW_P (f) | |
11114 | || !MARKERP (Voverlay_arrow_position) | |
11115 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
11116 | { | |
11117 | int this_scroll_margin; | |
8ee5b6a3 | 11118 | struct glyph_row *row = NULL; |
47589c8c GM |
11119 | |
11120 | #if GLYPH_DEBUG | |
11121 | debug_method_add (w, "cursor movement"); | |
11122 | #endif | |
11123 | ||
11124 | /* Scroll if point within this distance from the top or bottom | |
11125 | of the window. This is a pixel value. */ | |
11126 | this_scroll_margin = max (0, scroll_margin); | |
da8b7f4f KS |
11127 | this_scroll_margin = min (this_scroll_margin, WINDOW_TOTAL_LINES (w) / 4); |
11128 | this_scroll_margin *= FRAME_LINE_HEIGHT (f); | |
47589c8c GM |
11129 | |
11130 | /* Start with the row the cursor was displayed during the last | |
11131 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
11132 | if (w->last_cursor.vpos < 0 |
11133 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 11134 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
11135 | else |
11136 | { | |
11137 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
11138 | if (row->mode_line_p) | |
11139 | ++row; | |
11140 | if (!row->enabled_p) | |
cb617e7c | 11141 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
11142 | } |
11143 | ||
cb617e7c | 11144 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
11145 | { |
11146 | int scroll_p = 0; | |
68c5d1db | 11147 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
2311178e | 11148 | |
47589c8c GM |
11149 | if (PT > XFASTINT (w->last_point)) |
11150 | { | |
11151 | /* Point has moved forward. */ | |
47589c8c GM |
11152 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
11153 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
11154 | { | |
11155 | xassert (row->enabled_p); | |
11156 | ++row; | |
11157 | } | |
11158 | ||
11159 | /* The end position of a row equals the start position | |
11160 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
11161 | display it in the next line. */ |
11162 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
11163 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
11164 | && !cursor_row_p (w, row)) | |
11165 | ++row; | |
47589c8c GM |
11166 | |
11167 | /* If within the scroll margin, scroll. Note that | |
11168 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
11169 | the next line would be drawn, and that | |
11170 | this_scroll_margin can be zero. */ | |
11171 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
11172 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
11173 | /* Line is completely visible last line in window | |
11174 | and PT is to be set in the next line. */ | |
11175 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
11176 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
11177 | && !row->ends_at_zv_p | |
11178 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
11179 | scroll_p = 1; | |
11180 | } | |
11181 | else if (PT < XFASTINT (w->last_point)) | |
11182 | { | |
11183 | /* Cursor has to be moved backward. Note that PT >= | |
11184 | CHARPOS (startp) because of the outer | |
11185 | if-statement. */ | |
11186 | while (!row->mode_line_p | |
11187 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
11188 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
11189 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
11190 | && (row->y > this_scroll_margin | |
11191 | || CHARPOS (startp) == BEGV)) | |
11192 | { | |
11193 | xassert (row->enabled_p); | |
11194 | --row; | |
11195 | } | |
11196 | ||
11197 | /* Consider the following case: Window starts at BEGV, | |
11198 | there is invisible, intangible text at BEGV, so that | |
11199 | display starts at some point START > BEGV. It can | |
11200 | happen that we are called with PT somewhere between | |
11201 | BEGV and START. Try to handle that case. */ | |
11202 | if (row < w->current_matrix->rows | |
11203 | || row->mode_line_p) | |
11204 | { | |
11205 | row = w->current_matrix->rows; | |
11206 | if (row->mode_line_p) | |
11207 | ++row; | |
11208 | } | |
11209 | ||
11210 | /* Due to newlines in overlay strings, we may have to | |
11211 | skip forward over overlay strings. */ | |
68c5d1db GM |
11212 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
11213 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
11214 | && !cursor_row_p (w, row)) | |
47589c8c | 11215 | ++row; |
2311178e | 11216 | |
47589c8c GM |
11217 | /* If within the scroll margin, scroll. */ |
11218 | if (row->y < this_scroll_margin | |
11219 | && CHARPOS (startp) != BEGV) | |
11220 | scroll_p = 1; | |
11221 | } | |
11222 | ||
11223 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
11224 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
11225 | { | |
11226 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 11227 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 11228 | } |
440fc135 | 11229 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c | 11230 | { |
8de4aaf8 GM |
11231 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
11232 | && !row->ends_at_zv_p | |
11233 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 11234 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 11235 | else if (row->height > window_box_height (w)) |
440fc135 | 11236 | { |
8de4aaf8 GM |
11237 | /* If we end up in a partially visible line, let's |
11238 | make it fully visible, except when it's taller | |
11239 | than the window, in which case we can't do much | |
11240 | about it. */ | |
440fc135 | 11241 | *scroll_step = 1; |
cb617e7c | 11242 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
11243 | } |
11244 | else | |
11245 | { | |
11246 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 11247 | if (!make_cursor_line_fully_visible (w)) |
ddf6b9a3 | 11248 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
cb617e7c GM |
11249 | else |
11250 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 11251 | } |
47589c8c GM |
11252 | } |
11253 | else if (scroll_p) | |
cb617e7c | 11254 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
11255 | else |
11256 | { | |
11257 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 11258 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
11259 | } |
11260 | } | |
11261 | } | |
11262 | ||
11263 | return rc; | |
11264 | } | |
11265 | ||
9a08d928 SM |
11266 | void |
11267 | set_vertical_scroll_bar (w) | |
11268 | struct window *w; | |
11269 | { | |
11270 | int start, end, whole; | |
11271 | ||
11272 | /* Calculate the start and end positions for the current window. | |
11273 | At some point, it would be nice to choose between scrollbars | |
11274 | which reflect the whole buffer size, with special markers | |
11275 | indicating narrowing, and scrollbars which reflect only the | |
11276 | visible region. | |
11277 | ||
11278 | Note that mini-buffers sometimes aren't displaying any text. */ | |
11279 | if (!MINI_WINDOW_P (w) | |
11280 | || (w == XWINDOW (minibuf_window) | |
11281 | && NILP (echo_area_buffer[0]))) | |
11282 | { | |
11283 | struct buffer *buf = XBUFFER (w->buffer); | |
11284 | whole = BUF_ZV (buf) - BUF_BEGV (buf); | |
11285 | start = marker_position (w->start) - BUF_BEGV (buf); | |
11286 | /* I don't think this is guaranteed to be right. For the | |
11287 | moment, we'll pretend it is. */ | |
11288 | end = BUF_Z (buf) - XFASTINT (w->window_end_pos) - BUF_BEGV (buf); | |
11289 | ||
11290 | if (end < start) | |
11291 | end = start; | |
11292 | if (whole < (end - start)) | |
11293 | whole = end - start; | |
11294 | } | |
11295 | else | |
11296 | start = end = whole = 0; | |
11297 | ||
11298 | /* Indicate what this scroll bar ought to be displaying now. */ | |
11299 | set_vertical_scroll_bar_hook (w, end - start, whole, start); | |
11300 | } | |
47589c8c | 11301 | |
5f5c8ee5 | 11302 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
b60c9653 RS |
11303 | selected_window is redisplayed. |
11304 | ||
11305 | We can return without actually redisplaying the window if | |
11306 | fonts_changed_p is nonzero. In that case, redisplay_internal will | |
11307 | retry. */ | |
90adcf20 | 11308 | |
a2889657 | 11309 | static void |
5f5c8ee5 | 11310 | redisplay_window (window, just_this_one_p) |
a2889657 | 11311 | Lisp_Object window; |
5f5c8ee5 | 11312 | int just_this_one_p; |
a2889657 | 11313 | { |
5f5c8ee5 GM |
11314 | struct window *w = XWINDOW (window); |
11315 | struct frame *f = XFRAME (w->frame); | |
11316 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 11317 | struct buffer *old = current_buffer; |
5f5c8ee5 | 11318 | struct text_pos lpoint, opoint, startp; |
e481f960 | 11319 | int update_mode_line; |
5f5c8ee5 GM |
11320 | int tem; |
11321 | struct it it; | |
11322 | /* Record it now because it's overwritten. */ | |
11323 | int current_matrix_up_to_date_p = 0; | |
c62c1bb5 RS |
11324 | /* This is less strict than current_matrix_up_to_date_p. |
11325 | It indictes that the buffer contents and narrowing are unchanged. */ | |
11326 | int buffer_unchanged_p = 0; | |
5f5c8ee5 | 11327 | int temp_scroll_step = 0; |
331379bf | 11328 | int count = SPECPDL_INDEX (); |
47589c8c | 11329 | int rc; |
ddf6b9a3 | 11330 | int centering_position; |
03b0a4b4 | 11331 | int last_line_misfit = 0; |
a2889657 | 11332 | |
5f5c8ee5 GM |
11333 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
11334 | opoint = lpoint; | |
a2889657 | 11335 | |
5f5c8ee5 GM |
11336 | /* W must be a leaf window here. */ |
11337 | xassert (!NILP (w->buffer)); | |
11338 | #if GLYPH_DEBUG | |
11339 | *w->desired_matrix->method = 0; | |
11340 | #endif | |
2e54982e RS |
11341 | |
11342 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
11343 | |
11344 | reconsider_clip_changes (w, buffer); | |
2311178e TTN |
11345 | |
11346 | /* Has the mode line to be updated? */ | |
5f5c8ee5 GM |
11347 | update_mode_line = (!NILP (w->update_mode_line) |
11348 | || update_mode_lines | |
c62c1bb5 RS |
11349 | || buffer->clip_changed |
11350 | || buffer->prevent_redisplay_optimizations_p); | |
8de2d90b JB |
11351 | |
11352 | if (MINI_WINDOW_P (w)) | |
11353 | { | |
5f5c8ee5 | 11354 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 11355 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
11356 | { |
11357 | if (update_mode_line) | |
11358 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 11359 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
11360 | goto finish_menu_bars; |
11361 | else | |
11362 | /* We've already displayed the echo area glyphs in this window. */ | |
11363 | goto finish_scroll_bars; | |
11364 | } | |
b2b5455d RS |
11365 | else if ((w != XWINDOW (minibuf_window) |
11366 | || minibuf_level == 0) | |
c0bcce6f JPW |
11367 | /* When buffer is nonempty, redisplay window normally. */ |
11368 | && BUF_Z (XBUFFER (w->buffer)) == BUF_BEG (XBUFFER (w->buffer)) | |
3354fdcf RS |
11369 | /* Quail displays non-mini buffers in minibuffer window. |
11370 | In that case, redisplay the window normally. */ | |
b2b5455d | 11371 | && !NILP (Fmemq (w->buffer, Vminibuffer_list))) |
8de2d90b | 11372 | { |
3354fdcf RS |
11373 | /* W is a mini-buffer window, but it's not active, so clear |
11374 | it. */ | |
5f5c8ee5 GM |
11375 | int yb = window_text_bottom_y (w); |
11376 | struct glyph_row *row; | |
11377 | int y; | |
11378 | ||
11379 | for (y = 0, row = w->desired_matrix->rows; | |
11380 | y < yb; | |
11381 | y += row->height, ++row) | |
11382 | blank_row (w, row, y); | |
88f22aff | 11383 | goto finish_scroll_bars; |
8de2d90b | 11384 | } |
c095a1dd GM |
11385 | |
11386 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 11387 | } |
a2889657 | 11388 | |
5f5c8ee5 GM |
11389 | /* Otherwise set up data on this window; select its buffer and point |
11390 | value. */ | |
6a93695f GM |
11391 | /* Really select the buffer, for the sake of buffer-local |
11392 | variables. */ | |
11393 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
11394 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
11395 | ||
11396 | current_matrix_up_to_date_p | |
11397 | = (!NILP (w->window_end_valid) | |
11398 | && !current_buffer->clip_changed | |
c62c1bb5 | 11399 | && !current_buffer->prevent_redisplay_optimizations_p |
5f5c8ee5 GM |
11400 | && XFASTINT (w->last_modified) >= MODIFF |
11401 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 11402 | |
c62c1bb5 RS |
11403 | buffer_unchanged_p |
11404 | = (!NILP (w->window_end_valid) | |
11405 | && !current_buffer->clip_changed | |
3f1258d0 | 11406 | && XFASTINT (w->last_modified) >= MODIFF |
c62c1bb5 RS |
11407 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); |
11408 | ||
5f5c8ee5 GM |
11409 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
11410 | the window end being valid, so set it to nil there. */ | |
11411 | if (windows_or_buffers_changed) | |
11412 | { | |
11413 | /* If window starts on a continuation line, maybe adjust the | |
11414 | window start in case the window's width changed. */ | |
11415 | if (XMARKER (w->start)->buffer == current_buffer) | |
11416 | compute_window_start_on_continuation_line (w); | |
2311178e | 11417 | |
5f5c8ee5 GM |
11418 | w->window_end_valid = Qnil; |
11419 | } | |
12adba34 | 11420 | |
5f5c8ee5 GM |
11421 | /* Some sanity checks. */ |
11422 | CHECK_WINDOW_END (w); | |
11423 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 11424 | abort (); |
5f5c8ee5 | 11425 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 11426 | abort (); |
a2889657 | 11427 | |
28995e67 RS |
11428 | /* If %c is in mode line, update it if needed. */ |
11429 | if (!NILP (w->column_number_displayed) | |
11430 | /* This alternative quickly identifies a common case | |
11431 | where no change is needed. */ | |
11432 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
11433 | && XFASTINT (w->last_modified) >= MODIFF |
11434 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
11435 | && (XFASTINT (w->column_number_displayed) |
11436 | != (int) current_column ())) /* iftc */ | |
11437 | update_mode_line = 1; | |
28995e67 | 11438 | |
5f5c8ee5 GM |
11439 | /* Count number of windows showing the selected buffer. An indirect |
11440 | buffer counts as its base buffer. */ | |
11441 | if (!just_this_one_p) | |
42640f83 RS |
11442 | { |
11443 | struct buffer *current_base, *window_base; | |
11444 | current_base = current_buffer; | |
11445 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
11446 | if (current_base->base_buffer) | |
11447 | current_base = current_base->base_buffer; | |
11448 | if (window_base->base_buffer) | |
11449 | window_base = window_base->base_buffer; | |
11450 | if (current_base == window_base) | |
11451 | buffer_shared++; | |
11452 | } | |
a2889657 | 11453 | |
5f5c8ee5 GM |
11454 | /* Point refers normally to the selected window. For any other |
11455 | window, set up appropriate value. */ | |
a2889657 JB |
11456 | if (!EQ (window, selected_window)) |
11457 | { | |
12adba34 RS |
11458 | int new_pt = XMARKER (w->pointm)->charpos; |
11459 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 11460 | if (new_pt < BEGV) |
a2889657 | 11461 | { |
f67a0f51 | 11462 | new_pt = BEGV; |
12adba34 RS |
11463 | new_pt_byte = BEGV_BYTE; |
11464 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 11465 | } |
f67a0f51 | 11466 | else if (new_pt > (ZV - 1)) |
a2889657 | 11467 | { |
f67a0f51 | 11468 | new_pt = ZV; |
12adba34 RS |
11469 | new_pt_byte = ZV_BYTE; |
11470 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 11471 | } |
2311178e | 11472 | |
f67a0f51 | 11473 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 11474 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
11475 | } |
11476 | ||
f4faa47c | 11477 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
11478 | have changed, invalidate the width run cache. It's true that |
11479 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
11480 | redisplay goes (non-fatally) haywire when the display table is |
11481 | changed, so why should we worry about doing any better? */ | |
11482 | if (current_buffer->width_run_cache) | |
11483 | { | |
f908610f | 11484 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
11485 | |
11486 | if (! disptab_matches_widthtab (disptab, | |
11487 | XVECTOR (current_buffer->width_table))) | |
11488 | { | |
11489 | invalidate_region_cache (current_buffer, | |
11490 | current_buffer->width_run_cache, | |
11491 | BEG, Z); | |
11492 | recompute_width_table (current_buffer, disptab); | |
11493 | } | |
11494 | } | |
11495 | ||
a2889657 | 11496 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
11497 | if (XMARKER (w->start)->buffer != current_buffer) |
11498 | goto recenter; | |
11499 | ||
5f5c8ee5 | 11500 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 11501 | |
cf0df6ab RS |
11502 | /* If someone specified a new starting point but did not insist, |
11503 | check whether it can be used. */ | |
cfad01b4 GM |
11504 | if (!NILP (w->optional_new_start) |
11505 | && CHARPOS (startp) >= BEGV | |
11506 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
11507 | { |
11508 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
11509 | start_display (&it, w, startp); |
11510 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
11511 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
11512 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
11513 | w->force_start = Qt; |
11514 | } | |
11515 | ||
8de2d90b | 11516 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 11517 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
11518 | if (!NILP (w->force_start) |
11519 | || w->frozen_window_start_p) | |
a2889657 | 11520 | { |
b60c9653 RS |
11521 | /* We set this later on if we have to adjust point. */ |
11522 | int new_vpos = -1; | |
11523 | ||
e63574d7 | 11524 | w->force_start = Qnil; |
5f5c8ee5 | 11525 | w->vscroll = 0; |
b5174a51 | 11526 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
11527 | |
11528 | /* Forget any recorded base line for line number display. */ | |
c62c1bb5 | 11529 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
11530 | w->base_line_number = Qnil; |
11531 | ||
75c43375 RS |
11532 | /* Redisplay the mode line. Select the buffer properly for that. |
11533 | Also, run the hook window-scroll-functions | |
11534 | because we have scrolled. */ | |
e63574d7 RS |
11535 | /* Note, we do this after clearing force_start because |
11536 | if there's an error, it is better to forget about force_start | |
11537 | than to get into an infinite loop calling the hook functions | |
11538 | and having them get more errors. */ | |
75c43375 RS |
11539 | if (!update_mode_line |
11540 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 11541 | { |
e481f960 RS |
11542 | update_mode_line = 1; |
11543 | w->update_mode_line = Qt; | |
5f5c8ee5 | 11544 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 11545 | } |
2311178e | 11546 | |
ac90c44f GM |
11547 | w->last_modified = make_number (0); |
11548 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
11549 | if (CHARPOS (startp) < BEGV) |
11550 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
11551 | else if (CHARPOS (startp) > ZV) | |
11552 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
2311178e TTN |
11553 | |
11554 | /* Redisplay, then check if cursor has been set during the | |
5f5c8ee5 GM |
11555 | redisplay. Give up if new fonts were loaded. */ |
11556 | if (!try_window (window, startp)) | |
11557 | { | |
11558 | w->force_start = Qt; | |
11559 | clear_glyph_matrix (w->desired_matrix); | |
b60c9653 | 11560 | goto need_larger_matrices; |
5f5c8ee5 GM |
11561 | } |
11562 | ||
9472f927 | 11563 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 11564 | { |
b28cb6ed GM |
11565 | /* If point does not appear, try to move point so it does |
11566 | appear. The desired matrix has been built above, so we | |
11567 | can use it here. */ | |
b60c9653 RS |
11568 | new_vpos = window_box_height (w) / 2; |
11569 | } | |
11570 | ||
11571 | if (!make_cursor_line_fully_visible (w)) | |
11572 | { | |
11573 | /* Point does appear, but on a line partly visible at end of window. | |
11574 | Move it back to a fully-visible line. */ | |
11575 | new_vpos = window_box_height (w); | |
11576 | } | |
11577 | ||
11578 | /* If we need to move point for either of the above reasons, | |
11579 | now actually do it. */ | |
11580 | if (new_vpos >= 0) | |
11581 | { | |
b28cb6ed GM |
11582 | struct glyph_row *row; |
11583 | ||
b28cb6ed | 11584 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); |
b60c9653 | 11585 | while (MATRIX_ROW_BOTTOM_Y (row) < new_vpos) |
5f5c8ee5 GM |
11586 | ++row; |
11587 | ||
11588 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
11589 | MATRIX_ROW_START_BYTEPOS (row)); | |
11590 | ||
90adcf20 | 11591 | if (w != XWINDOW (selected_window)) |
12adba34 | 11592 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
11593 | else if (current_buffer == old) |
11594 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
11595 | ||
11596 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
2311178e | 11597 | |
5f5c8ee5 GM |
11598 | /* If we are highlighting the region, then we just changed |
11599 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
11600 | if (!NILP (Vtransient_mark_mode) |
11601 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 11602 | { |
5f5c8ee5 GM |
11603 | clear_glyph_matrix (w->desired_matrix); |
11604 | if (!try_window (window, startp)) | |
cb617e7c | 11605 | goto need_larger_matrices; |
6f27fa9b | 11606 | } |
a2889657 | 11607 | } |
5f5c8ee5 | 11608 | |
5f5c8ee5 GM |
11609 | #if GLYPH_DEBUG |
11610 | debug_method_add (w, "forced window start"); | |
11611 | #endif | |
a2889657 JB |
11612 | goto done; |
11613 | } | |
11614 | ||
5f5c8ee5 | 11615 | /* Handle case where text has not changed, only point, and it has |
3f029ea0 RS |
11616 | not moved off the frame, and we are not retrying after hscroll. |
11617 | (current_matrix_up_to_date_p is nonzero when retrying.) */ | |
11618 | if (current_matrix_up_to_date_p | |
47589c8c | 11619 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 11620 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 11621 | { |
cb617e7c GM |
11622 | switch (rc) |
11623 | { | |
11624 | case CURSOR_MOVEMENT_SUCCESS: | |
11625 | goto done; | |
2311178e | 11626 | |
b60c9653 | 11627 | #if 0 /* try_cursor_movement never returns this value. */ |
cb617e7c GM |
11628 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: |
11629 | goto need_larger_matrices; | |
b60c9653 | 11630 | #endif |
2311178e | 11631 | |
cb617e7c GM |
11632 | case CURSOR_MOVEMENT_MUST_SCROLL: |
11633 | goto try_to_scroll; | |
2311178e | 11634 | |
cb617e7c GM |
11635 | default: |
11636 | abort (); | |
11637 | } | |
a2889657 JB |
11638 | } |
11639 | /* If current starting point was originally the beginning of a line | |
11640 | but no longer is, find a new starting point. */ | |
265a9e55 | 11641 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
11642 | && !(CHARPOS (startp) <= BEGV |
11643 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 11644 | { |
5f5c8ee5 GM |
11645 | #if GLYPH_DEBUG |
11646 | debug_method_add (w, "recenter 1"); | |
11647 | #endif | |
a2889657 JB |
11648 | goto recenter; |
11649 | } | |
2311178e | 11650 | |
27d16f05 GM |
11651 | /* Try scrolling with try_window_id. Value is > 0 if update has |
11652 | been done, it is -1 if we know that the same window start will | |
11653 | not work. It is 0 if unsuccessful for some other reason. */ | |
11654 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 11655 | { |
5f5c8ee5 | 11656 | #if GLYPH_DEBUG |
ef121659 | 11657 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
11658 | #endif |
11659 | ||
11660 | if (fonts_changed_p) | |
cb617e7c | 11661 | goto need_larger_matrices; |
a2889657 JB |
11662 | if (tem > 0) |
11663 | goto done; | |
ef121659 | 11664 | |
5f5c8ee5 GM |
11665 | /* Otherwise try_window_id has returned -1 which means that we |
11666 | don't want the alternative below this comment to execute. */ | |
a2889657 | 11667 | } |
5f5c8ee5 GM |
11668 | else if (CHARPOS (startp) >= BEGV |
11669 | && CHARPOS (startp) <= ZV | |
11670 | && PT >= CHARPOS (startp) | |
11671 | && (CHARPOS (startp) < ZV | |
e9874cee | 11672 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 11673 | || CHARPOS (startp) == BEGV |
8850a573 RS |
11674 | || (XFASTINT (w->last_modified) >= MODIFF |
11675 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 11676 | { |
5f5c8ee5 GM |
11677 | #if GLYPH_DEBUG |
11678 | debug_method_add (w, "same window start"); | |
11679 | #endif | |
2311178e | 11680 | |
5f5c8ee5 GM |
11681 | /* Try to redisplay starting at same place as before. |
11682 | If point has not moved off frame, accept the results. */ | |
11683 | if (!current_matrix_up_to_date_p | |
11684 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
11685 | because a window scroll function can have changed the |
11686 | buffer. */ | |
5f5c8ee5 GM |
11687 | || !NILP (Vwindow_scroll_functions) |
11688 | || MINI_WINDOW_P (w) | |
11689 | || !try_window_reusing_current_matrix (w)) | |
11690 | { | |
11691 | IF_DEBUG (debug_method_add (w, "1")); | |
11692 | try_window (window, startp); | |
11693 | } | |
11694 | ||
11695 | if (fonts_changed_p) | |
cb617e7c | 11696 | goto need_larger_matrices; |
2311178e | 11697 | |
5f5c8ee5 | 11698 | if (w->cursor.vpos >= 0) |
aa6d10fa | 11699 | { |
2311178e | 11700 | if (!just_this_one_p |
5f5c8ee5 | 11701 | || current_buffer->clip_changed |
9142dd5b | 11702 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
11703 | /* Forget any recorded base line for line number display. */ |
11704 | w->base_line_number = Qnil; | |
2311178e | 11705 | |
cb617e7c | 11706 | if (!make_cursor_line_fully_visible (w)) |
03b0a4b4 RS |
11707 | { |
11708 | clear_glyph_matrix (w->desired_matrix); | |
11709 | last_line_misfit = 1; | |
11710 | } | |
ddf6b9a3 | 11711 | /* Drop through and scroll. */ |
ef3c2c73 RS |
11712 | else |
11713 | goto done; | |
aa6d10fa | 11714 | } |
a2889657 | 11715 | else |
5f5c8ee5 | 11716 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
11717 | } |
11718 | ||
5f5c8ee5 GM |
11719 | try_to_scroll: |
11720 | ||
ac90c44f GM |
11721 | w->last_modified = make_number (0); |
11722 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 11723 | |
e481f960 RS |
11724 | /* Redisplay the mode line. Select the buffer properly for that. */ |
11725 | if (!update_mode_line) | |
11726 | { | |
e481f960 RS |
11727 | update_mode_line = 1; |
11728 | w->update_mode_line = Qt; | |
11729 | } | |
a2889657 | 11730 | |
5f5c8ee5 GM |
11731 | /* Try to scroll by specified few lines. */ |
11732 | if ((scroll_conservatively | |
11733 | || scroll_step | |
11734 | || temp_scroll_step | |
11735 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
11736 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 11737 | && !current_buffer->clip_changed |
2311178e | 11738 | && CHARPOS (startp) >= BEGV |
5f5c8ee5 | 11739 | && CHARPOS (startp) <= ZV) |
0789adb2 | 11740 | { |
5f5c8ee5 GM |
11741 | /* The function returns -1 if new fonts were loaded, 1 if |
11742 | successful, 0 if not successful. */ | |
11743 | int rc = try_scrolling (window, just_this_one_p, | |
11744 | scroll_conservatively, | |
11745 | scroll_step, | |
03b0a4b4 | 11746 | temp_scroll_step, last_line_misfit); |
cb617e7c GM |
11747 | switch (rc) |
11748 | { | |
11749 | case SCROLLING_SUCCESS: | |
11750 | goto done; | |
2311178e | 11751 | |
cb617e7c GM |
11752 | case SCROLLING_NEED_LARGER_MATRICES: |
11753 | goto need_larger_matrices; | |
2311178e | 11754 | |
cb617e7c GM |
11755 | case SCROLLING_FAILED: |
11756 | break; | |
2311178e | 11757 | |
cb617e7c GM |
11758 | default: |
11759 | abort (); | |
11760 | } | |
5f5c8ee5 | 11761 | } |
f9c8af06 | 11762 | |
5f5c8ee5 | 11763 | /* Finally, just choose place to start which centers point */ |
5936754e | 11764 | |
5f5c8ee5 | 11765 | recenter: |
ddf6b9a3 RS |
11766 | centering_position = window_box_height (w) / 2; |
11767 | ||
11768 | point_at_top: | |
11769 | /* Jump here with centering_position already set to 0. */ | |
44173109 | 11770 | |
5f5c8ee5 GM |
11771 | #if GLYPH_DEBUG |
11772 | debug_method_add (w, "recenter"); | |
11773 | #endif | |
0789adb2 | 11774 | |
5f5c8ee5 | 11775 | /* w->vscroll = 0; */ |
0789adb2 | 11776 | |
5f5c8ee5 | 11777 | /* Forget any previously recorded base line for line number display. */ |
c62c1bb5 | 11778 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
11779 | w->base_line_number = Qnil; |
11780 | ||
11781 | /* Move backward half the height of the window. */ | |
11782 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
11783 | it.current_y = it.last_visible_y; | |
ddf6b9a3 | 11784 | move_it_vertically_backward (&it, centering_position); |
5f5c8ee5 GM |
11785 | xassert (IT_CHARPOS (it) >= BEGV); |
11786 | ||
11787 | /* The function move_it_vertically_backward may move over more | |
11788 | than the specified y-distance. If it->w is small, e.g. a | |
11789 | mini-buffer window, we may end up in front of the window's | |
11790 | display area. Start displaying at the start of the line | |
11791 | containing PT in this case. */ | |
11792 | if (it.current_y <= 0) | |
11793 | { | |
11794 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
11795 | move_it_vertically (&it, 0); | |
11796 | xassert (IT_CHARPOS (it) <= PT); | |
11797 | it.current_y = 0; | |
0789adb2 RS |
11798 | } |
11799 | ||
5f5c8ee5 | 11800 | it.current_x = it.hpos = 0; |
2311178e | 11801 | |
5f5c8ee5 GM |
11802 | /* Set startp here explicitly in case that helps avoid an infinite loop |
11803 | in case the window-scroll-functions functions get errors. */ | |
11804 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
11805 | ||
11806 | /* Run scroll hooks. */ | |
11807 | startp = run_window_scroll_functions (window, it.current.pos); | |
11808 | ||
11809 | /* Redisplay the window. */ | |
11810 | if (!current_matrix_up_to_date_p | |
11811 | || windows_or_buffers_changed | |
5fb96e96 | 11812 | || cursor_type_changed |
5f5c8ee5 GM |
11813 | /* Don't use try_window_reusing_current_matrix in this case |
11814 | because it can have changed the buffer. */ | |
11815 | || !NILP (Vwindow_scroll_functions) | |
11816 | || !just_this_one_p | |
11817 | || MINI_WINDOW_P (w) | |
11818 | || !try_window_reusing_current_matrix (w)) | |
11819 | try_window (window, startp); | |
11820 | ||
11821 | /* If new fonts have been loaded (due to fontsets), give up. We | |
11822 | have to start a new redisplay since we need to re-adjust glyph | |
11823 | matrices. */ | |
11824 | if (fonts_changed_p) | |
cb617e7c | 11825 | goto need_larger_matrices; |
5f5c8ee5 GM |
11826 | |
11827 | /* If cursor did not appear assume that the middle of the window is | |
11828 | in the first line of the window. Do it again with the next line. | |
11829 | (Imagine a window of height 100, displaying two lines of height | |
11830 | 60. Moving back 50 from it->last_visible_y will end in the first | |
11831 | line.) */ | |
11832 | if (w->cursor.vpos < 0) | |
a2889657 | 11833 | { |
5f5c8ee5 GM |
11834 | if (!NILP (w->window_end_valid) |
11835 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 11836 | { |
5f5c8ee5 GM |
11837 | clear_glyph_matrix (w->desired_matrix); |
11838 | move_it_by_lines (&it, 1, 0); | |
11839 | try_window (window, it.current.pos); | |
a2889657 | 11840 | } |
5f5c8ee5 | 11841 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 11842 | { |
5f5c8ee5 GM |
11843 | clear_glyph_matrix (w->desired_matrix); |
11844 | move_it_by_lines (&it, -1, 0); | |
11845 | try_window (window, it.current.pos); | |
11846 | } | |
11847 | else | |
11848 | { | |
11849 | /* Not much we can do about it. */ | |
a2889657 | 11850 | } |
a2889657 | 11851 | } |
010494d0 | 11852 | |
5f5c8ee5 GM |
11853 | /* Consider the following case: Window starts at BEGV, there is |
11854 | invisible, intangible text at BEGV, so that display starts at | |
11855 | some point START > BEGV. It can happen that we are called with | |
11856 | PT somewhere between BEGV and START. Try to handle that case. */ | |
11857 | if (w->cursor.vpos < 0) | |
835766b6 | 11858 | { |
5f5c8ee5 GM |
11859 | struct glyph_row *row = w->current_matrix->rows; |
11860 | if (row->mode_line_p) | |
11861 | ++row; | |
11862 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 11863 | } |
2311178e | 11864 | |
cb617e7c | 11865 | if (!make_cursor_line_fully_visible (w)) |
ddf6b9a3 | 11866 | { |
932357b4 KS |
11867 | /* If vscroll is enabled, disable it and try again. */ |
11868 | if (w->vscroll) | |
11869 | { | |
11870 | w->vscroll = 0; | |
11871 | clear_glyph_matrix (w->desired_matrix); | |
11872 | goto recenter; | |
11873 | } | |
2a6d0874 | 11874 | |
ddf6b9a3 RS |
11875 | /* If centering point failed to make the whole line visible, |
11876 | put point at the top instead. That has to make the whole line | |
11877 | visible, if it can be done. */ | |
11878 | centering_position = 0; | |
11879 | goto point_at_top; | |
11880 | } | |
b5174a51 | 11881 | |
74d481ac GM |
11882 | done: |
11883 | ||
5f5c8ee5 GM |
11884 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
11885 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
11886 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
11887 | ? Qt : Qnil); | |
a2889657 | 11888 | |
5f5c8ee5 | 11889 | /* Display the mode line, if we must. */ |
e481f960 | 11890 | if ((update_mode_line |
aa6d10fa | 11891 | /* If window not full width, must redo its mode line |
2311178e | 11892 | if (a) the window to its side is being redone and |
5f5c8ee5 GM |
11893 | (b) we do a frame-based redisplay. This is a consequence |
11894 | of how inverted lines are drawn in frame-based redisplay. */ | |
2311178e | 11895 | || (!just_this_one_p |
5f5c8ee5 GM |
11896 | && !FRAME_WINDOW_P (f) |
11897 | && !WINDOW_FULL_WIDTH_P (w)) | |
11898 | /* Line number to display. */ | |
155ef550 | 11899 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 11900 | /* Column number is displayed and different from the one displayed. */ |
155ef550 | 11901 | || (!NILP (w->column_number_displayed) |
2311178e TTN |
11902 | && (XFASTINT (w->column_number_displayed) |
11903 | != (int) current_column ()))) /* iftc */ | |
5f5c8ee5 GM |
11904 | /* This means that the window has a mode line. */ |
11905 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 11906 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 11907 | { |
5f5c8ee5 GM |
11908 | display_mode_lines (w); |
11909 | ||
11910 | /* If mode line height has changed, arrange for a thorough | |
11911 | immediate redisplay using the correct mode line height. */ | |
11912 | if (WINDOW_WANTS_MODELINE_P (w) | |
11913 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 11914 | { |
5f5c8ee5 GM |
11915 | fonts_changed_p = 1; |
11916 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
11917 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 11918 | } |
2311178e | 11919 | |
5f5c8ee5 GM |
11920 | /* If top line height has changed, arrange for a thorough |
11921 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
11922 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
11923 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
11924 | { |
11925 | fonts_changed_p = 1; | |
045dee35 GM |
11926 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
11927 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
11928 | } |
11929 | ||
11930 | if (fonts_changed_p) | |
cb617e7c | 11931 | goto need_larger_matrices; |
5ba50c51 | 11932 | } |
5f5c8ee5 GM |
11933 | |
11934 | if (!line_number_displayed | |
11935 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
11936 | { |
11937 | w->base_line_pos = Qnil; | |
11938 | w->base_line_number = Qnil; | |
11939 | } | |
a2889657 | 11940 | |
5f5c8ee5 | 11941 | finish_menu_bars: |
2311178e | 11942 | |
7ce2c095 | 11943 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 11944 | if (update_mode_line |
5f5c8ee5 GM |
11945 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
11946 | { | |
11947 | int redisplay_menu_p = 0; | |
488dd4c4 | 11948 | int redisplay_tool_bar_p = 0; |
5f5c8ee5 GM |
11949 | |
11950 | if (FRAME_WINDOW_P (f)) | |
11951 | { | |
488dd4c4 JD |
11952 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
11953 | || defined (USE_GTK) | |
5f5c8ee5 | 11954 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 11955 | #else |
5f5c8ee5 | 11956 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 11957 | #endif |
5f5c8ee5 GM |
11958 | } |
11959 | else | |
11960 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
11961 | ||
11962 | if (redisplay_menu_p) | |
11963 | display_menu_bar (w); | |
11964 | ||
11965 | #ifdef HAVE_WINDOW_SYSTEM | |
488dd4c4 JD |
11966 | #ifdef USE_GTK |
11967 | redisplay_tool_bar_p = FRAME_EXTERNAL_TOOL_BAR (f); | |
11968 | #else | |
11969 | redisplay_tool_bar_p = WINDOWP (f->tool_bar_window) | |
11970 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
11971 | || auto_resize_tool_bars_p); | |
177c0ea7 | 11972 | |
488dd4c4 JD |
11973 | #endif |
11974 | ||
11975 | if (redisplay_tool_bar_p) | |
11976 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
11977 | #endif |
11978 | } | |
7ce2c095 | 11979 | |
b60c9653 RS |
11980 | /* We go to this label, with fonts_changed_p nonzero, |
11981 | if it is necessary to try again using larger glyph matrices. | |
11982 | We have to redeem the scroll bar even in this case, | |
11983 | because the loop in redisplay_internal expects that. */ | |
cb617e7c GM |
11984 | need_larger_matrices: |
11985 | ; | |
88f22aff | 11986 | finish_scroll_bars: |
5f5c8ee5 | 11987 | |
da8b7f4f | 11988 | if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w)) |
30c566e4 | 11989 | { |
9a08d928 SM |
11990 | /* Set the thumb's position and size. */ |
11991 | set_vertical_scroll_bar (w); | |
30c566e4 | 11992 | |
5f5c8ee5 GM |
11993 | /* Note that we actually used the scroll bar attached to this |
11994 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 11995 | redeem_scroll_bar_hook (w); |
30c566e4 | 11996 | } |
b1d1124b | 11997 | |
5f5c8ee5 GM |
11998 | /* Restore current_buffer and value of point in it. */ |
11999 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 12000 | set_buffer_internal_1 (old); |
5f5c8ee5 | 12001 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
12002 | |
12003 | unbind_to (count, Qnil); | |
a2889657 | 12004 | } |
a2889657 | 12005 | |
5f5c8ee5 GM |
12006 | |
12007 | /* Build the complete desired matrix of WINDOW with a window start | |
12008 | buffer position POS. Value is non-zero if successful. It is zero | |
12009 | if fonts were loaded during redisplay which makes re-adjusting | |
12010 | glyph matrices necessary. */ | |
12011 | ||
12012 | int | |
a2889657 JB |
12013 | try_window (window, pos) |
12014 | Lisp_Object window; | |
5f5c8ee5 GM |
12015 | struct text_pos pos; |
12016 | { | |
12017 | struct window *w = XWINDOW (window); | |
12018 | struct it it; | |
12019 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 12020 | |
5f5c8ee5 GM |
12021 | /* Make POS the new window start. */ |
12022 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 12023 | |
5f5c8ee5 GM |
12024 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
12025 | w->cursor.vpos = -1; | |
a2889657 | 12026 | overlay_arrow_seen = 0; |
642eefc6 | 12027 | |
5f5c8ee5 GM |
12028 | /* Initialize iterator and info to start at POS. */ |
12029 | start_display (&it, w, pos); | |
a2889657 | 12030 | |
5f5c8ee5 GM |
12031 | /* Display all lines of W. */ |
12032 | while (it.current_y < it.last_visible_y) | |
12033 | { | |
12034 | if (display_line (&it)) | |
12035 | last_text_row = it.glyph_row - 1; | |
12036 | if (fonts_changed_p) | |
12037 | return 0; | |
12038 | } | |
a2889657 | 12039 | |
5f5c8ee5 GM |
12040 | /* If bottom moved off end of frame, change mode line percentage. */ |
12041 | if (XFASTINT (w->window_end_pos) <= 0 | |
12042 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
12043 | w->update_mode_line = Qt; |
12044 | ||
5f5c8ee5 GM |
12045 | /* Set window_end_pos to the offset of the last character displayed |
12046 | on the window from the end of current_buffer. Set | |
12047 | window_end_vpos to its row number. */ | |
12048 | if (last_text_row) | |
12049 | { | |
12050 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
12051 | w->window_end_bytepos | |
12052 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12053 | w->window_end_pos |
12054 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
12055 | w->window_end_vpos | |
12056 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
12057 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
12058 | ->displays_text_p); | |
12059 | } | |
12060 | else | |
12061 | { | |
86bf3faa RS |
12062 | w->window_end_bytepos = Z_BYTE - ZV_BYTE; |
12063 | w->window_end_pos = make_number (Z - ZV); | |
12064 | w->window_end_vpos = make_number (0); | |
5f5c8ee5 | 12065 | } |
2311178e | 12066 | |
a2889657 JB |
12067 | /* But that is not valid info until redisplay finishes. */ |
12068 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 12069 | return 1; |
a2889657 | 12070 | } |
5f5c8ee5 GM |
12071 | |
12072 | ||
a2889657 | 12073 | \f |
5f5c8ee5 GM |
12074 | /************************************************************************ |
12075 | Window redisplay reusing current matrix when buffer has not changed | |
12076 | ************************************************************************/ | |
12077 | ||
12078 | /* Try redisplay of window W showing an unchanged buffer with a | |
12079 | different window start than the last time it was displayed by | |
12080 | reusing its current matrix. Value is non-zero if successful. | |
12081 | W->start is the new window start. */ | |
a2889657 JB |
12082 | |
12083 | static int | |
5f5c8ee5 GM |
12084 | try_window_reusing_current_matrix (w) |
12085 | struct window *w; | |
a2889657 | 12086 | { |
5f5c8ee5 GM |
12087 | struct frame *f = XFRAME (w->frame); |
12088 | struct glyph_row *row, *bottom_row; | |
12089 | struct it it; | |
12090 | struct run run; | |
12091 | struct text_pos start, new_start; | |
12092 | int nrows_scrolled, i; | |
12093 | struct glyph_row *last_text_row; | |
12094 | struct glyph_row *last_reused_text_row; | |
12095 | struct glyph_row *start_row; | |
12096 | int start_vpos, min_y, max_y; | |
75c5350a | 12097 | |
69d1f7c9 | 12098 | #if GLYPH_DEBUG |
76cb5e06 GM |
12099 | if (inhibit_try_window_reusing) |
12100 | return 0; | |
12101 | #endif | |
12102 | ||
d18354b6 GM |
12103 | if (/* This function doesn't handle terminal frames. */ |
12104 | !FRAME_WINDOW_P (f) | |
12105 | /* Don't try to reuse the display if windows have been split | |
12106 | or such. */ | |
5fb96e96 RS |
12107 | || windows_or_buffers_changed |
12108 | || cursor_type_changed) | |
5f5c8ee5 | 12109 | return 0; |
a2889657 | 12110 | |
5f5c8ee5 GM |
12111 | /* Can't do this if region may have changed. */ |
12112 | if ((!NILP (Vtransient_mark_mode) | |
12113 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
12114 | || !NILP (w->region_showing) |
12115 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 12116 | return 0; |
a2889657 | 12117 | |
5f5c8ee5 | 12118 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
12119 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
12120 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
12121 | return 0; |
12122 | ||
12123 | /* Give up if old or new display is scrolled vertically. We could | |
12124 | make this function handle this, but right now it doesn't. */ | |
12125 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
12126 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
12127 | return 0; | |
12128 | ||
12129 | /* The variable new_start now holds the new window start. The old | |
12130 | start `start' can be determined from the current matrix. */ | |
12131 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
12132 | start = start_row->start.pos; | |
12133 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 12134 | |
5f5c8ee5 GM |
12135 | /* Clear the desired matrix for the display below. */ |
12136 | clear_glyph_matrix (w->desired_matrix); | |
2311178e | 12137 | |
5f5c8ee5 GM |
12138 | if (CHARPOS (new_start) <= CHARPOS (start)) |
12139 | { | |
12140 | int first_row_y; | |
2311178e | 12141 | |
607ec83c GM |
12142 | /* Don't use this method if the display starts with an ellipsis |
12143 | displayed for invisible text. It's not easy to handle that case | |
12144 | below, and it's certainly not worth the effort since this is | |
12145 | not a frequent case. */ | |
12146 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
12147 | return 0; | |
12148 | ||
5f5c8ee5 | 12149 | IF_DEBUG (debug_method_add (w, "twu1")); |
2311178e | 12150 | |
5f5c8ee5 GM |
12151 | /* Display up to a row that can be reused. The variable |
12152 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
12153 | text. Note that it.vpos == 0 if or if not there is a |
12154 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
12155 | start_display (&it, w, new_start); |
12156 | first_row_y = it.current_y; | |
12157 | w->cursor.vpos = -1; | |
12158 | last_text_row = last_reused_text_row = NULL; | |
2311178e | 12159 | |
5f5c8ee5 GM |
12160 | while (it.current_y < it.last_visible_y |
12161 | && IT_CHARPOS (it) < CHARPOS (start) | |
12162 | && !fonts_changed_p) | |
12163 | if (display_line (&it)) | |
12164 | last_text_row = it.glyph_row - 1; | |
12165 | ||
12166 | /* A value of current_y < last_visible_y means that we stopped | |
12167 | at the previous window start, which in turn means that we | |
12168 | have at least one reusable row. */ | |
12169 | if (it.current_y < it.last_visible_y) | |
a2889657 | 12170 | { |
b48f74cb | 12171 | /* IT.vpos always starts from 0; it counts text lines. */ |
5f5c8ee5 | 12172 | nrows_scrolled = it.vpos; |
2311178e | 12173 | |
5f5c8ee5 GM |
12174 | /* Find PT if not already found in the lines displayed. */ |
12175 | if (w->cursor.vpos < 0) | |
a2889657 | 12176 | { |
5f5c8ee5 | 12177 | int dy = it.current_y - first_row_y; |
2311178e | 12178 | |
5f5c8ee5 | 12179 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
0df56f4d GM |
12180 | row = row_containing_pos (w, PT, row, NULL, dy); |
12181 | if (row) | |
12182 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
12183 | dy, nrows_scrolled); | |
12184 | else | |
5f5c8ee5 GM |
12185 | { |
12186 | clear_glyph_matrix (w->desired_matrix); | |
12187 | return 0; | |
12188 | } | |
a2889657 | 12189 | } |
5f5c8ee5 GM |
12190 | |
12191 | /* Scroll the display. Do it before the current matrix is | |
12192 | changed. The problem here is that update has not yet | |
12193 | run, i.e. part of the current matrix is not up to date. | |
12194 | scroll_run_hook will clear the cursor, and use the | |
12195 | current matrix to get the height of the row the cursor is | |
12196 | in. */ | |
12197 | run.current_y = first_row_y; | |
12198 | run.desired_y = it.current_y; | |
12199 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
12200 | |
12201 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 12202 | { |
5f5c8ee5 GM |
12203 | update_begin (f); |
12204 | rif->update_window_begin_hook (w); | |
fa3c6b4d | 12205 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 12206 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 12207 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 12208 | update_end (f); |
a2889657 | 12209 | } |
5f5c8ee5 GM |
12210 | |
12211 | /* Shift current matrix down by nrows_scrolled lines. */ | |
12212 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
12213 | rotate_matrix (w->current_matrix, | |
12214 | start_vpos, | |
12215 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
12216 | nrows_scrolled); | |
2311178e | 12217 | |
9c8b8382 | 12218 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 12219 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 12220 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 12221 | |
5f5c8ee5 | 12222 | /* Re-compute Y positions. */ |
da8b7f4f | 12223 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 12224 | max_y = it.last_visible_y; |
b48f74cb GM |
12225 | for (row = start_row + nrows_scrolled; |
12226 | row < bottom_row; | |
12227 | ++row) | |
d2f84654 | 12228 | { |
5f5c8ee5 | 12229 | row->y = it.current_y; |
75c5350a | 12230 | row->visible_height = row->height; |
5f5c8ee5 GM |
12231 | |
12232 | if (row->y < min_y) | |
75c5350a GM |
12233 | row->visible_height -= min_y - row->y; |
12234 | if (row->y + row->height > max_y) | |
12235 | row->visible_height -= row->y + row->height - max_y; | |
2311178e | 12236 | |
5f5c8ee5 | 12237 | it.current_y += row->height; |
5f5c8ee5 GM |
12238 | |
12239 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
12240 | last_reused_text_row = row; | |
12241 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
12242 | break; | |
d2f84654 | 12243 | } |
2311178e | 12244 | |
9c8b8382 GM |
12245 | /* Disable lines in the current matrix which are now |
12246 | below the window. */ | |
bafb434c | 12247 | for (++row; row < bottom_row; ++row) |
9c8b8382 | 12248 | row->enabled_p = 0; |
a2889657 | 12249 | } |
5f5c8ee5 GM |
12250 | |
12251 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
12252 | reused row from the current matrix containing text, if any. | |
12253 | The value of last_text_row is the last displayed line | |
12254 | containing text. */ | |
12255 | if (last_reused_text_row) | |
a2889657 | 12256 | { |
5f5c8ee5 GM |
12257 | w->window_end_bytepos |
12258 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
12259 | w->window_end_pos |
12260 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
12261 | w->window_end_vpos | |
12262 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
12263 | w->current_matrix)); | |
a2889657 | 12264 | } |
5f5c8ee5 GM |
12265 | else if (last_text_row) |
12266 | { | |
12267 | w->window_end_bytepos | |
12268 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12269 | w->window_end_pos |
12270 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
12271 | w->window_end_vpos | |
12272 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
12273 | } |
12274 | else | |
12275 | { | |
12276 | /* This window must be completely empty. */ | |
86bf3faa RS |
12277 | w->window_end_bytepos = Z_BYTE - ZV_BYTE; |
12278 | w->window_end_pos = make_number (Z - ZV); | |
12279 | w->window_end_vpos = make_number (0); | |
5f5c8ee5 GM |
12280 | } |
12281 | w->window_end_valid = Qnil; | |
a2889657 | 12282 | |
5f5c8ee5 GM |
12283 | /* Update hint: don't try scrolling again in update_window. */ |
12284 | w->desired_matrix->no_scrolling_p = 1; | |
2311178e | 12285 | |
5f5c8ee5 GM |
12286 | #if GLYPH_DEBUG |
12287 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
12288 | #endif | |
12289 | return 1; | |
a2889657 | 12290 | } |
5f5c8ee5 GM |
12291 | else if (CHARPOS (new_start) > CHARPOS (start)) |
12292 | { | |
12293 | struct glyph_row *pt_row, *row; | |
12294 | struct glyph_row *first_reusable_row; | |
12295 | struct glyph_row *first_row_to_display; | |
12296 | int dy; | |
12297 | int yb = window_text_bottom_y (w); | |
12298 | ||
5f5c8ee5 GM |
12299 | /* Find the row starting at new_start, if there is one. Don't |
12300 | reuse a partially visible line at the end. */ | |
b48f74cb | 12301 | first_reusable_row = start_row; |
5f5c8ee5 GM |
12302 | while (first_reusable_row->enabled_p |
12303 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
12304 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
12305 | < CHARPOS (new_start))) | |
12306 | ++first_reusable_row; | |
12307 | ||
12308 | /* Give up if there is no row to reuse. */ | |
12309 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
12310 | || !first_reusable_row->enabled_p |
12311 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
12312 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
12313 | return 0; |
12314 | ||
5f5c8ee5 GM |
12315 | /* We can reuse fully visible rows beginning with |
12316 | first_reusable_row to the end of the window. Set | |
12317 | first_row_to_display to the first row that cannot be reused. | |
12318 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 12319 | pt_row = NULL; |
ac90c44f GM |
12320 | for (first_row_to_display = first_reusable_row; |
12321 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
12322 | ++first_row_to_display) | |
5f5c8ee5 | 12323 | { |
4bde0ebb GM |
12324 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
12325 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 12326 | pt_row = first_row_to_display; |
5f5c8ee5 | 12327 | } |
a2889657 | 12328 | |
5f5c8ee5 GM |
12329 | /* Start displaying at the start of first_row_to_display. */ |
12330 | xassert (first_row_to_display->y < yb); | |
12331 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 12332 | |
b48f74cb GM |
12333 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
12334 | - start_vpos); | |
5f5c8ee5 GM |
12335 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
12336 | - nrows_scrolled); | |
b48f74cb | 12337 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
da8b7f4f | 12338 | + WINDOW_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
12339 | |
12340 | /* Display lines beginning with first_row_to_display in the | |
12341 | desired matrix. Set last_text_row to the last row displayed | |
12342 | that displays text. */ | |
12343 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
12344 | if (pt_row == NULL) | |
12345 | w->cursor.vpos = -1; | |
12346 | last_text_row = NULL; | |
12347 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
12348 | if (display_line (&it)) | |
12349 | last_text_row = it.glyph_row - 1; | |
12350 | ||
12351 | /* Give up If point isn't in a row displayed or reused. */ | |
12352 | if (w->cursor.vpos < 0) | |
12353 | { | |
12354 | clear_glyph_matrix (w->desired_matrix); | |
12355 | return 0; | |
12356 | } | |
12adba34 | 12357 | |
5f5c8ee5 GM |
12358 | /* If point is in a reused row, adjust y and vpos of the cursor |
12359 | position. */ | |
12360 | if (pt_row) | |
12361 | { | |
12362 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
12363 | w->current_matrix); | |
12364 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
12365 | } |
12366 | ||
5f5c8ee5 GM |
12367 | /* Scroll the display. */ |
12368 | run.current_y = first_reusable_row->y; | |
da8b7f4f | 12369 | run.desired_y = WINDOW_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 12370 | run.height = it.last_visible_y - run.current_y; |
4da61803 | 12371 | dy = run.current_y - run.desired_y; |
2311178e | 12372 | |
5f5c8ee5 GM |
12373 | if (run.height) |
12374 | { | |
12375 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
12376 | update_begin (f); | |
12377 | rif->update_window_begin_hook (w); | |
fa3c6b4d | 12378 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 12379 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 12380 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
12381 | update_end (f); |
12382 | } | |
a2889657 | 12383 | |
5f5c8ee5 GM |
12384 | /* Adjust Y positions of reused rows. */ |
12385 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
da8b7f4f | 12386 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 12387 | max_y = it.last_visible_y; |
b48f74cb | 12388 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
12389 | { |
12390 | row->y -= dy; | |
75c5350a | 12391 | row->visible_height = row->height; |
5f5c8ee5 | 12392 | if (row->y < min_y) |
75c5350a GM |
12393 | row->visible_height -= min_y - row->y; |
12394 | if (row->y + row->height > max_y) | |
12395 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 12396 | } |
a2889657 | 12397 | |
5f5c8ee5 GM |
12398 | /* Scroll the current matrix. */ |
12399 | xassert (nrows_scrolled > 0); | |
12400 | rotate_matrix (w->current_matrix, | |
12401 | start_vpos, | |
12402 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
12403 | -nrows_scrolled); | |
12404 | ||
ac90c44f GM |
12405 | /* Disable rows not reused. */ |
12406 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
12407 | row->enabled_p = 0; | |
12408 | ||
5f5c8ee5 GM |
12409 | /* Adjust window end. A null value of last_text_row means that |
12410 | the window end is in reused rows which in turn means that | |
12411 | only its vpos can have changed. */ | |
12412 | if (last_text_row) | |
12413 | { | |
12414 | w->window_end_bytepos | |
12415 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12416 | w->window_end_pos |
12417 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
12418 | w->window_end_vpos | |
12419 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
12420 | } |
12421 | else | |
a2889657 | 12422 | { |
ac90c44f GM |
12423 | w->window_end_vpos |
12424 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 12425 | } |
2311178e | 12426 | |
5f5c8ee5 GM |
12427 | w->window_end_valid = Qnil; |
12428 | w->desired_matrix->no_scrolling_p = 1; | |
12429 | ||
12430 | #if GLYPH_DEBUG | |
12431 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
12432 | #endif | |
12433 | return 1; | |
a2889657 | 12434 | } |
2311178e | 12435 | |
5f5c8ee5 GM |
12436 | return 0; |
12437 | } | |
a2889657 | 12438 | |
a2889657 | 12439 | |
5f5c8ee5 GM |
12440 | \f |
12441 | /************************************************************************ | |
12442 | Window redisplay reusing current matrix when buffer has changed | |
12443 | ************************************************************************/ | |
12444 | ||
1ec185cb GM |
12445 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
12446 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
12447 | int *, int *)); |
12448 | static struct glyph_row * | |
12449 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
12450 | struct glyph_row *)); | |
12451 | ||
12452 | ||
12453 | /* Return the last row in MATRIX displaying text. If row START is | |
12454 | non-null, start searching with that row. IT gives the dimensions | |
12455 | of the display. Value is null if matrix is empty; otherwise it is | |
12456 | a pointer to the row found. */ | |
12457 | ||
12458 | static struct glyph_row * | |
12459 | find_last_row_displaying_text (matrix, it, start) | |
12460 | struct glyph_matrix *matrix; | |
12461 | struct it *it; | |
12462 | struct glyph_row *start; | |
12463 | { | |
12464 | struct glyph_row *row, *row_found; | |
12465 | ||
12466 | /* Set row_found to the last row in IT->w's current matrix | |
12467 | displaying text. The loop looks funny but think of partially | |
12468 | visible lines. */ | |
12469 | row_found = NULL; | |
12470 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
12471 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
12472 | { | |
12473 | xassert (row->enabled_p); | |
12474 | row_found = row; | |
12475 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
12476 | break; | |
12477 | ++row; | |
a2889657 | 12478 | } |
2311178e | 12479 | |
5f5c8ee5 GM |
12480 | return row_found; |
12481 | } | |
12482 | ||
a2889657 | 12483 | |
5f5c8ee5 | 12484 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
12485 | by changes at the start of current_buffer that occurred since W's |
12486 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 12487 | |
d43fbe9d GM |
12488 | BEG_UNCHANGED us the number of characters unchanged at the start of |
12489 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
12490 | first changed character in current_buffer. Characters at positions < | |
12491 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
12492 | when the current matrix was built. */ | |
5f5c8ee5 GM |
12493 | |
12494 | static struct glyph_row * | |
1ec185cb | 12495 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
12496 | struct window *w; |
12497 | { | |
9142dd5b | 12498 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
12499 | struct glyph_row *row; |
12500 | struct glyph_row *row_found = NULL; | |
12501 | int yb = window_text_bottom_y (w); | |
12502 | ||
12503 | /* Find the last row displaying unchanged text. */ | |
12504 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
12505 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
12506 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 12507 | { |
5f5c8ee5 GM |
12508 | if (/* If row ends before first_changed_pos, it is unchanged, |
12509 | except in some case. */ | |
12510 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
12511 | /* When row ends in ZV and we write at ZV it is not | |
12512 | unchanged. */ | |
12513 | && !row->ends_at_zv_p | |
12514 | /* When first_changed_pos is the end of a continued line, | |
12515 | row is not unchanged because it may be no longer | |
12516 | continued. */ | |
12517 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
12518 | && row->continued_p)) | |
12519 | row_found = row; | |
12520 | ||
12521 | /* Stop if last visible row. */ | |
12522 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
12523 | break; | |
2311178e | 12524 | |
5f5c8ee5 | 12525 | ++row; |
a2889657 JB |
12526 | } |
12527 | ||
5f5c8ee5 | 12528 | return row_found; |
a2889657 | 12529 | } |
5f5c8ee5 GM |
12530 | |
12531 | ||
12532 | /* Find the first glyph row in the current matrix of W that is not | |
2311178e | 12533 | affected by changes at the end of current_buffer since the |
d43fbe9d GM |
12534 | time W's current matrix was built. |
12535 | ||
12536 | Return in *DELTA the number of chars by which buffer positions in | |
12537 | unchanged text at the end of current_buffer must be adjusted. | |
2311178e | 12538 | |
d43fbe9d GM |
12539 | Return in *DELTA_BYTES the corresponding number of bytes. |
12540 | ||
12541 | Value is null if no such row exists, i.e. all rows are affected by | |
12542 | changes. */ | |
2311178e | 12543 | |
5f5c8ee5 | 12544 | static struct glyph_row * |
1ec185cb | 12545 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
12546 | struct window *w; |
12547 | int *delta, *delta_bytes; | |
a2889657 | 12548 | { |
5f5c8ee5 GM |
12549 | struct glyph_row *row; |
12550 | struct glyph_row *row_found = NULL; | |
c581d710 | 12551 | |
5f5c8ee5 | 12552 | *delta = *delta_bytes = 0; |
b2a76982 | 12553 | |
1ec185cb GM |
12554 | /* Display must not have been paused, otherwise the current matrix |
12555 | is not up to date. */ | |
12556 | if (NILP (w->window_end_valid)) | |
12557 | abort (); | |
2311178e | 12558 | |
1ec185cb | 12559 | /* A value of window_end_pos >= END_UNCHANGED means that the window |
5f5c8ee5 GM |
12560 | end is in the range of changed text. If so, there is no |
12561 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 12562 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
12563 | return NULL; |
12564 | ||
12565 | /* Set row to the last row in W's current matrix displaying text. */ | |
12566 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
2311178e TTN |
12567 | |
12568 | /* If matrix is entirely empty, no unchanged row exists. */ | |
5f5c8ee5 GM |
12569 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
12570 | { | |
12571 | /* The value of row is the last glyph row in the matrix having a | |
12572 | meaningful buffer position in it. The end position of row | |
12573 | corresponds to window_end_pos. This allows us to translate | |
12574 | buffer positions in the current matrix to current buffer | |
12575 | positions for characters not in changed text. */ | |
12576 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
12577 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
12578 | int last_unchanged_pos, last_unchanged_pos_old; | |
12579 | struct glyph_row *first_text_row | |
12580 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
12581 | ||
12582 | *delta = Z - Z_old; | |
12583 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
12584 | ||
12585 | /* Set last_unchanged_pos to the buffer position of the last | |
12586 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
12587 | index + 1 of the last character in current_buffer, i.e. by |
12588 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
12589 | unchanged character, and we have to add BEG to get its buffer |
12590 | position. */ | |
9142dd5b | 12591 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 | 12592 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
2311178e | 12593 | |
5f5c8ee5 GM |
12594 | /* Search backward from ROW for a row displaying a line that |
12595 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 12596 | for (; row > first_text_row; --row) |
5f5c8ee5 | 12597 | { |
1ec185cb GM |
12598 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
12599 | abort (); | |
2311178e | 12600 | |
5f5c8ee5 GM |
12601 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) |
12602 | row_found = row; | |
5f5c8ee5 GM |
12603 | } |
12604 | } | |
12605 | ||
1ec185cb GM |
12606 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
12607 | abort (); | |
2311178e | 12608 | |
5f5c8ee5 | 12609 | return row_found; |
c581d710 RS |
12610 | } |
12611 | ||
c581d710 | 12612 | |
5f5c8ee5 GM |
12613 | /* Make sure that glyph rows in the current matrix of window W |
12614 | reference the same glyph memory as corresponding rows in the | |
12615 | frame's frame matrix. This function is called after scrolling W's | |
12616 | current matrix on a terminal frame in try_window_id and | |
12617 | try_window_reusing_current_matrix. */ | |
12618 | ||
12619 | static void | |
12620 | sync_frame_with_window_matrix_rows (w) | |
12621 | struct window *w; | |
c581d710 | 12622 | { |
5f5c8ee5 GM |
12623 | struct frame *f = XFRAME (w->frame); |
12624 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
12625 | ||
12626 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
12627 | must have a frame matrix. */ | |
12628 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
12629 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
12630 | xassert (!FRAME_WINDOW_P (f)); | |
12631 | ||
12632 | /* If W is a full-width window, glyph pointers in W's current matrix | |
12633 | have, by definition, to be the same as glyph pointers in the | |
7d4cc828 GM |
12634 | corresponding frame matrix. Note that frame matrices have no |
12635 | marginal areas (see build_frame_matrix). */ | |
5f5c8ee5 GM |
12636 | window_row = w->current_matrix->rows; |
12637 | window_row_end = window_row + w->current_matrix->nrows; | |
da8b7f4f | 12638 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
5f5c8ee5 | 12639 | while (window_row < window_row_end) |
659a218f | 12640 | { |
7d4cc828 GM |
12641 | struct glyph *start = window_row->glyphs[LEFT_MARGIN_AREA]; |
12642 | struct glyph *end = window_row->glyphs[LAST_AREA]; | |
12643 | ||
12644 | frame_row->glyphs[LEFT_MARGIN_AREA] = start; | |
12645 | frame_row->glyphs[TEXT_AREA] = start; | |
12646 | frame_row->glyphs[RIGHT_MARGIN_AREA] = end; | |
12647 | frame_row->glyphs[LAST_AREA] = end; | |
f002db93 GM |
12648 | |
12649 | /* Disable frame rows whose corresponding window rows have | |
12650 | been disabled in try_window_id. */ | |
12651 | if (!window_row->enabled_p) | |
12652 | frame_row->enabled_p = 0; | |
2311178e | 12653 | |
5f5c8ee5 | 12654 | ++window_row, ++frame_row; |
659a218f | 12655 | } |
a2889657 | 12656 | } |
5f5c8ee5 GM |
12657 | |
12658 | ||
e037b9ec GM |
12659 | /* Find the glyph row in window W containing CHARPOS. Consider all |
12660 | rows between START and END (not inclusive). END null means search | |
12661 | all rows to the end of the display area of W. Value is the row | |
12662 | containing CHARPOS or null. */ | |
12663 | ||
0bef35bc | 12664 | struct glyph_row * |
0df56f4d | 12665 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
12666 | struct window *w; |
12667 | int charpos; | |
12668 | struct glyph_row *start, *end; | |
0df56f4d | 12669 | int dy; |
e037b9ec GM |
12670 | { |
12671 | struct glyph_row *row = start; | |
12672 | int last_y; | |
12673 | ||
12674 | /* If we happen to start on a header-line, skip that. */ | |
12675 | if (row->mode_line_p) | |
12676 | ++row; | |
2311178e | 12677 | |
e037b9ec GM |
12678 | if ((end && row >= end) || !row->enabled_p) |
12679 | return NULL; | |
2311178e | 12680 | |
0df56f4d | 12681 | last_y = window_text_bottom_y (w) - dy; |
2311178e | 12682 | |
5cce13dd RS |
12683 | while (1) |
12684 | { | |
12685 | /* Give up if we have gone too far. */ | |
12686 | if (end && row >= end) | |
12687 | return NULL; | |
40a301b3 RS |
12688 | /* This formerly returned if they were equal. |
12689 | I think that both quantities are of a "last plus one" type; | |
12690 | if so, when they are equal, the row is within the screen. -- rms. */ | |
12691 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y) | |
5cce13dd RS |
12692 | return NULL; |
12693 | ||
12694 | /* If it is in this row, return this row. */ | |
12695 | if (! (MATRIX_ROW_END_CHARPOS (row) < charpos | |
e037b9ec | 12696 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
12697 | /* The end position of a row equals the start |
12698 | position of the next row. If CHARPOS is there, we | |
12699 | would rather display it in the next line, except | |
12700 | when this line ends in ZV. */ | |
12701 | && !row->ends_at_zv_p | |
5cce13dd RS |
12702 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) |
12703 | && charpos >= MATRIX_ROW_START_CHARPOS (row)) | |
12704 | return row; | |
12705 | ++row; | |
12706 | } | |
e037b9ec GM |
12707 | } |
12708 | ||
12709 | ||
5f5c8ee5 GM |
12710 | /* Try to redisplay window W by reusing its existing display. W's |
12711 | current matrix must be up to date when this function is called, | |
12712 | i.e. window_end_valid must not be nil. | |
12713 | ||
12714 | Value is | |
12715 | ||
12716 | 1 if display has been updated | |
12717 | 0 if otherwise unsuccessful | |
12718 | -1 if redisplay with same window start is known not to succeed | |
12719 | ||
12720 | The following steps are performed: | |
12721 | ||
12722 | 1. Find the last row in the current matrix of W that is not | |
12723 | affected by changes at the start of current_buffer. If no such row | |
12724 | is found, give up. | |
12725 | ||
12726 | 2. Find the first row in W's current matrix that is not affected by | |
12727 | changes at the end of current_buffer. Maybe there is no such row. | |
12728 | ||
12729 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
12730 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
12731 | the window. | |
12732 | ||
12733 | 4. If cursor is not known to appear on the window, give up. | |
12734 | ||
12735 | 5. If display stopped at the row found in step 2, scroll the | |
12736 | display and current matrix as needed. | |
12737 | ||
12738 | 6. Maybe display some lines at the end of W, if we must. This can | |
12739 | happen under various circumstances, like a partially visible line | |
12740 | becoming fully visible, or because newly displayed lines are displayed | |
12741 | in smaller font sizes. | |
12742 | ||
12743 | 7. Update W's window end information. */ | |
12744 | ||
12adba34 | 12745 | static int |
5f5c8ee5 | 12746 | try_window_id (w) |
12adba34 | 12747 | struct window *w; |
12adba34 | 12748 | { |
5f5c8ee5 GM |
12749 | struct frame *f = XFRAME (w->frame); |
12750 | struct glyph_matrix *current_matrix = w->current_matrix; | |
12751 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
12752 | struct glyph_row *last_unchanged_at_beg_row; | |
12753 | struct glyph_row *first_unchanged_at_end_row; | |
12754 | struct glyph_row *row; | |
12755 | struct glyph_row *bottom_row; | |
12756 | int bottom_vpos; | |
12757 | struct it it; | |
12758 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
12759 | struct text_pos start_pos; | |
12760 | struct run run; | |
12761 | int first_unchanged_at_end_vpos = 0; | |
12762 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
12763 | struct text_pos start; | |
27d16f05 | 12764 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 12765 | |
69d1f7c9 | 12766 | #if GLYPH_DEBUG |
76cb5e06 GM |
12767 | if (inhibit_try_window_id) |
12768 | return 0; | |
12769 | #endif | |
12770 | ||
27d16f05 GM |
12771 | /* This is handy for debugging. */ |
12772 | #if 0 | |
12773 | #define GIVE_UP(X) \ | |
12774 | do { \ | |
12775 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
12776 | return 0; \ | |
12777 | } while (0) | |
12778 | #else | |
62397849 | 12779 | #define GIVE_UP(X) return 0 |
27d16f05 | 12780 | #endif |
2311178e | 12781 | |
5f5c8ee5 GM |
12782 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
12783 | ||
27d16f05 GM |
12784 | /* Don't use this for mini-windows because these can show |
12785 | messages and mini-buffers, and we don't handle that here. */ | |
12786 | if (MINI_WINDOW_P (w)) | |
12787 | GIVE_UP (1); | |
2311178e | 12788 | |
27d16f05 | 12789 | /* This flag is used to prevent redisplay optimizations. */ |
5fb96e96 | 12790 | if (windows_or_buffers_changed || cursor_type_changed) |
27d16f05 | 12791 | GIVE_UP (2); |
2311178e | 12792 | |
c62c1bb5 RS |
12793 | /* Verify that narrowing has not changed. |
12794 | Also verify that we were not told to prevent redisplay optimizations. | |
12795 | It would be nice to further | |
27d16f05 | 12796 | reduce the number of cases where this prevents try_window_id. */ |
c62c1bb5 RS |
12797 | if (current_buffer->clip_changed |
12798 | || current_buffer->prevent_redisplay_optimizations_p) | |
27d16f05 GM |
12799 | GIVE_UP (3); |
12800 | ||
12801 | /* Window must either use window-based redisplay or be full width. */ | |
12802 | if (!FRAME_WINDOW_P (f) | |
12803 | && (!line_ins_del_ok | |
12804 | || !WINDOW_FULL_WIDTH_P (w))) | |
12805 | GIVE_UP (4); | |
5f5c8ee5 | 12806 | |
f5376658 | 12807 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
12808 | if (PT < CHARPOS (start)) |
12809 | GIVE_UP (5); | |
12810 | ||
12811 | /* Another way to prevent redisplay optimizations. */ | |
12812 | if (XFASTINT (w->last_modified) == 0) | |
12813 | GIVE_UP (6); | |
2311178e | 12814 | |
f5376658 | 12815 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
12816 | if (XFASTINT (w->hscroll) != 0) |
12817 | GIVE_UP (7); | |
2311178e | 12818 | |
f5376658 | 12819 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
12820 | if (NILP (w->window_end_valid)) |
12821 | GIVE_UP (8); | |
2311178e | 12822 | |
27d16f05 GM |
12823 | /* Can't use this if highlighting a region because a cursor movement |
12824 | will do more than just set the cursor. */ | |
12825 | if (!NILP (Vtransient_mark_mode) | |
12826 | && !NILP (current_buffer->mark_active)) | |
12827 | GIVE_UP (9); | |
12828 | ||
12829 | /* Likewise if highlighting trailing whitespace. */ | |
12830 | if (!NILP (Vshow_trailing_whitespace)) | |
12831 | GIVE_UP (11); | |
2311178e | 12832 | |
27d16f05 GM |
12833 | /* Likewise if showing a region. */ |
12834 | if (!NILP (w->region_showing)) | |
12835 | GIVE_UP (10); | |
2311178e | 12836 | |
27d16f05 GM |
12837 | /* Can use this if overlay arrow position and or string have changed. */ |
12838 | if (!EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) | |
12839 | || !EQ (last_arrow_string, Voverlay_arrow_string)) | |
12840 | GIVE_UP (12); | |
12841 | ||
2311178e | 12842 | |
5f5c8ee5 GM |
12843 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
12844 | only if buffer has really changed. The reason is that the gap is | |
12845 | initially at Z for freshly visited files. The code below would | |
12846 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
12847 | if (MODIFF > SAVE_MODIFF |
12848 | /* This seems to happen sometimes after saving a buffer. */ | |
12849 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 12850 | { |
9142dd5b GM |
12851 | if (GPT - BEG < BEG_UNCHANGED) |
12852 | BEG_UNCHANGED = GPT - BEG; | |
12853 | if (Z - GPT < END_UNCHANGED) | |
12854 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 12855 | } |
bf9249e3 | 12856 | |
27d16f05 GM |
12857 | /* The position of the first and last character that has been changed. */ |
12858 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
12859 | last_changed_charpos = Z - END_UNCHANGED; | |
12860 | ||
5f5c8ee5 GM |
12861 | /* If window starts after a line end, and the last change is in |
12862 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
12863 | This case happens with stealth-fontification. Note that although |
12864 | the display is unchanged, glyph positions in the matrix have to | |
12865 | be adjusted, of course. */ | |
5f5c8ee5 | 12866 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 12867 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 12868 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 12869 | && CHARPOS (start) == BEGV) |
e60f4527 | 12870 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
12871 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
12872 | { | |
12873 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
12874 | struct glyph_row *r0; | |
12875 | ||
12876 | /* Compute how many chars/bytes have been added to or removed | |
12877 | from the buffer. */ | |
12878 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
12879 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
12880 | delta = Z - Z_old; | |
12881 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
2311178e | 12882 | |
27d16f05 GM |
12883 | /* Give up if PT is not in the window. Note that it already has |
12884 | been checked at the start of try_window_id that PT is not in | |
12885 | front of the window start. */ | |
12886 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
12887 | GIVE_UP (13); | |
12888 | ||
12889 | /* If window start is unchanged, we can reuse the whole matrix | |
12890 | as is, after adjusting glyph positions. No need to compute | |
12891 | the window end again, since its offset from Z hasn't changed. */ | |
12892 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
12893 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
2d031b89 AS |
12894 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes |
12895 | /* PT must not be in a partially visible line. */ | |
12896 | && !(PT >= MATRIX_ROW_START_CHARPOS (row) + delta | |
12897 | && MATRIX_ROW_BOTTOM_Y (row) > window_text_bottom_y (w))) | |
27d16f05 GM |
12898 | { |
12899 | /* Adjust positions in the glyph matrix. */ | |
12900 | if (delta || delta_bytes) | |
12901 | { | |
12902 | struct glyph_row *r1 | |
12903 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
12904 | increment_matrix_positions (w->current_matrix, | |
12905 | MATRIX_ROW_VPOS (r0, current_matrix), | |
12906 | MATRIX_ROW_VPOS (r1, current_matrix), | |
12907 | delta, delta_bytes); | |
12908 | } | |
2311178e | 12909 | |
27d16f05 | 12910 | /* Set the cursor. */ |
0df56f4d | 12911 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
12912 | if (row) |
12913 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
12914 | else |
12915 | abort (); | |
27d16f05 GM |
12916 | return 1; |
12917 | } | |
5f5c8ee5 GM |
12918 | } |
12919 | ||
27d16f05 | 12920 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 12921 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
12922 | be taken if ZV is visible in the window, and text has been added |
12923 | there that is visible in the window. */ | |
12924 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
12925 | /* ZV is not visible in the window, or there are no |
12926 | changes at ZV, actually. */ | |
12927 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
12928 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 12929 | { |
27d16f05 | 12930 | struct glyph_row *r0; |
ef121659 | 12931 | |
27d16f05 GM |
12932 | /* Give up if PT is not in the window. Note that it already has |
12933 | been checked at the start of try_window_id that PT is not in | |
12934 | front of the window start. */ | |
12935 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
12936 | GIVE_UP (14); | |
12937 | ||
12938 | /* If window start is unchanged, we can reuse the whole matrix | |
12939 | as is, without changing glyph positions since no text has | |
12940 | been added/removed in front of the window end. */ | |
12941 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
2d031b89 AS |
12942 | if (TEXT_POS_EQUAL_P (start, r0->start.pos) |
12943 | /* PT must not be in a partially visible line. */ | |
12944 | && !(PT >= MATRIX_ROW_START_CHARPOS (row) | |
12945 | && MATRIX_ROW_BOTTOM_Y (row) > window_text_bottom_y (w))) | |
27d16f05 GM |
12946 | { |
12947 | /* We have to compute the window end anew since text | |
12948 | can have been added/removed after it. */ | |
12949 | w->window_end_pos | |
12950 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
12951 | w->window_end_bytepos | |
12952 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
12953 | ||
12954 | /* Set the cursor. */ | |
0df56f4d | 12955 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
12956 | if (row) |
12957 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
12958 | else |
12959 | abort (); | |
27d16f05 GM |
12960 | return 2; |
12961 | } | |
5f5c8ee5 GM |
12962 | } |
12963 | ||
2b9c25e0 | 12964 | /* Give up if window start is in the changed area. |
2311178e | 12965 | |
2b9c25e0 GM |
12966 | The condition used to read |
12967 | ||
12968 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
12969 | ||
12970 | but why that was tested escapes me at the moment. */ | |
12971 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
12972 | && CHARPOS (start) <= last_changed_charpos) |
12973 | GIVE_UP (15); | |
2311178e | 12974 | |
f5376658 RS |
12975 | /* Check that window start agrees with the start of the first glyph |
12976 | row in its current matrix. Check this after we know the window | |
12977 | start is not in changed text, otherwise positions would not be | |
12978 | comparable. */ | |
27d16f05 | 12979 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 12980 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 12981 | GIVE_UP (16); |
5f5c8ee5 | 12982 | |
23e8bd86 GM |
12983 | /* Give up if the window ends in strings. Overlay strings |
12984 | at the end are difficult to handle, so don't try. */ | |
12985 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
12986 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
12987 | GIVE_UP (20); | |
12988 | ||
5f5c8ee5 GM |
12989 | /* Compute the position at which we have to start displaying new |
12990 | lines. Some of the lines at the top of the window might be | |
12991 | reusable because they are not displaying changed text. Find the | |
12992 | last row in W's current matrix not affected by changes at the | |
12993 | start of current_buffer. Value is null if changes start in the | |
12994 | first line of window. */ | |
1ec185cb | 12995 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
12996 | if (last_unchanged_at_beg_row) |
12997 | { | |
67f1cf4c GM |
12998 | /* Avoid starting to display in the moddle of a character, a TAB |
12999 | for instance. This is easier than to set up the iterator | |
13000 | exactly, and it's not a frequent case, so the additional | |
13001 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
13002 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
13003 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
13004 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
13005 | --last_unchanged_at_beg_row; | |
13006 | ||
13007 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 13008 | GIVE_UP (17); |
47d57b22 GM |
13009 | |
13010 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
13011 | GIVE_UP (18); | |
5f5c8ee5 | 13012 | start_pos = it.current.pos; |
2311178e | 13013 | |
5f5c8ee5 GM |
13014 | /* Start displaying new lines in the desired matrix at the same |
13015 | vpos we would use in the current matrix, i.e. below | |
13016 | last_unchanged_at_beg_row. */ | |
13017 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
13018 | current_matrix); | |
13019 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
13020 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
13021 | ||
13022 | xassert (it.hpos == 0 && it.current_x == 0); | |
13023 | } | |
13024 | else | |
13025 | { | |
13026 | /* There are no reusable lines at the start of the window. | |
13027 | Start displaying in the first line. */ | |
13028 | start_display (&it, w, start); | |
13029 | start_pos = it.current.pos; | |
13030 | } | |
13031 | ||
5f5c8ee5 GM |
13032 | /* Find the first row that is not affected by changes at the end of |
13033 | the buffer. Value will be null if there is no unchanged row, in | |
13034 | which case we must redisplay to the end of the window. delta | |
13035 | will be set to the value by which buffer positions beginning with | |
13036 | first_unchanged_at_end_row have to be adjusted due to text | |
13037 | changes. */ | |
13038 | first_unchanged_at_end_row | |
1ec185cb | 13039 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
13040 | IF_DEBUG (debug_delta = delta); |
13041 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
2311178e | 13042 | |
5f5c8ee5 GM |
13043 | /* Set stop_pos to the buffer position up to which we will have to |
13044 | display new lines. If first_unchanged_at_end_row != NULL, this | |
13045 | is the buffer position of the start of the line displayed in that | |
13046 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
13047 | that we don't stop at a buffer position. */ | |
13048 | stop_pos = 0; | |
13049 | if (first_unchanged_at_end_row) | |
13050 | { | |
13051 | xassert (last_unchanged_at_beg_row == NULL | |
13052 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
2311178e | 13053 | |
5f5c8ee5 GM |
13054 | /* If this is a continuation line, move forward to the next one |
13055 | that isn't. Changes in lines above affect this line. | |
13056 | Caution: this may move first_unchanged_at_end_row to a row | |
13057 | not displaying text. */ | |
13058 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
13059 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
13060 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
13061 | < it.last_visible_y)) | |
13062 | ++first_unchanged_at_end_row; | |
13063 | ||
13064 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
13065 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
13066 | >= it.last_visible_y)) | |
13067 | first_unchanged_at_end_row = NULL; | |
13068 | else | |
13069 | { | |
13070 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
13071 | + delta); | |
13072 | first_unchanged_at_end_vpos | |
13073 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 13074 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
13075 | } |
13076 | } | |
13077 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 13078 | GIVE_UP (19); |
5f5c8ee5 GM |
13079 | |
13080 | ||
13081 | #if GLYPH_DEBUG | |
2311178e | 13082 | |
5f5c8ee5 GM |
13083 | /* Either there is no unchanged row at the end, or the one we have |
13084 | now displays text. This is a necessary condition for the window | |
13085 | end pos calculation at the end of this function. */ | |
13086 | xassert (first_unchanged_at_end_row == NULL | |
13087 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
2311178e | 13088 | |
5f5c8ee5 GM |
13089 | debug_last_unchanged_at_beg_vpos |
13090 | = (last_unchanged_at_beg_row | |
13091 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
13092 | : -1); | |
13093 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
2311178e | 13094 | |
5f5c8ee5 GM |
13095 | #endif /* GLYPH_DEBUG != 0 */ |
13096 | ||
2311178e | 13097 | |
5f5c8ee5 GM |
13098 | /* Display new lines. Set last_text_row to the last new line |
13099 | displayed which has text on it, i.e. might end up as being the | |
13100 | line where the window_end_vpos is. */ | |
13101 | w->cursor.vpos = -1; | |
13102 | last_text_row = NULL; | |
13103 | overlay_arrow_seen = 0; | |
13104 | while (it.current_y < it.last_visible_y | |
13105 | && !fonts_changed_p | |
13106 | && (first_unchanged_at_end_row == NULL | |
13107 | || IT_CHARPOS (it) < stop_pos)) | |
13108 | { | |
13109 | if (display_line (&it)) | |
13110 | last_text_row = it.glyph_row - 1; | |
13111 | } | |
13112 | ||
13113 | if (fonts_changed_p) | |
13114 | return -1; | |
13115 | ||
13116 | ||
13117 | /* Compute differences in buffer positions, y-positions etc. for | |
13118 | lines reused at the bottom of the window. Compute what we can | |
13119 | scroll. */ | |
ca42b2e8 GM |
13120 | if (first_unchanged_at_end_row |
13121 | /* No lines reused because we displayed everything up to the | |
13122 | bottom of the window. */ | |
13123 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
13124 | { |
13125 | dvpos = (it.vpos | |
13126 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
13127 | current_matrix)); | |
13128 | dy = it.current_y - first_unchanged_at_end_row->y; | |
13129 | run.current_y = first_unchanged_at_end_row->y; | |
13130 | run.desired_y = run.current_y + dy; | |
13131 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
13132 | } | |
13133 | else | |
ca42b2e8 GM |
13134 | { |
13135 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
13136 | first_unchanged_at_end_row = NULL; | |
13137 | } | |
5f5c8ee5 GM |
13138 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
13139 | ||
8f8ba186 | 13140 | |
5f5c8ee5 GM |
13141 | /* Find the cursor if not already found. We have to decide whether |
13142 | PT will appear on this window (it sometimes doesn't, but this is | |
13143 | not a very frequent case.) This decision has to be made before | |
13144 | the current matrix is altered. A value of cursor.vpos < 0 means | |
13145 | that PT is either in one of the lines beginning at | |
13146 | first_unchanged_at_end_row or below the window. Don't care for | |
13147 | lines that might be displayed later at the window end; as | |
13148 | mentioned, this is not a frequent case. */ | |
13149 | if (w->cursor.vpos < 0) | |
13150 | { | |
5f5c8ee5 GM |
13151 | /* Cursor in unchanged rows at the top? */ |
13152 | if (PT < CHARPOS (start_pos) | |
13153 | && last_unchanged_at_beg_row) | |
13154 | { | |
e037b9ec GM |
13155 | row = row_containing_pos (w, PT, |
13156 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 13157 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
13158 | if (row) |
13159 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
13160 | } |
13161 | ||
13162 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
13163 | else if (first_unchanged_at_end_row) | |
13164 | { | |
e037b9ec | 13165 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 13166 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 13167 | if (row) |
468155d7 GM |
13168 | set_cursor_from_row (w, row, w->current_matrix, delta, |
13169 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
13170 | } |
13171 | ||
13172 | /* Give up if cursor was not found. */ | |
13173 | if (w->cursor.vpos < 0) | |
13174 | { | |
13175 | clear_glyph_matrix (w->desired_matrix); | |
13176 | return -1; | |
13177 | } | |
13178 | } | |
2311178e | 13179 | |
5f5c8ee5 GM |
13180 | /* Don't let the cursor end in the scroll margins. */ |
13181 | { | |
13182 | int this_scroll_margin, cursor_height; | |
2311178e | 13183 | |
5f5c8ee5 | 13184 | this_scroll_margin = max (0, scroll_margin); |
da8b7f4f KS |
13185 | this_scroll_margin = min (this_scroll_margin, WINDOW_TOTAL_LINES (w) / 4); |
13186 | this_scroll_margin *= FRAME_LINE_HEIGHT (it.f); | |
5f5c8ee5 | 13187 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; |
2311178e | 13188 | |
5f5c8ee5 GM |
13189 | if ((w->cursor.y < this_scroll_margin |
13190 | && CHARPOS (start) > BEGV) | |
13191 | /* Don't take scroll margin into account at the bottom because | |
13192 | old redisplay didn't do it either. */ | |
13193 | || w->cursor.y + cursor_height > it.last_visible_y) | |
13194 | { | |
13195 | w->cursor.vpos = -1; | |
13196 | clear_glyph_matrix (w->desired_matrix); | |
13197 | return -1; | |
13198 | } | |
13199 | } | |
13200 | ||
13201 | /* Scroll the display. Do it before changing the current matrix so | |
13202 | that xterm.c doesn't get confused about where the cursor glyph is | |
13203 | found. */ | |
fa77249f | 13204 | if (dy && run.height) |
5f5c8ee5 GM |
13205 | { |
13206 | update_begin (f); | |
2311178e | 13207 | |
5f5c8ee5 GM |
13208 | if (FRAME_WINDOW_P (f)) |
13209 | { | |
13210 | rif->update_window_begin_hook (w); | |
fa3c6b4d | 13211 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 13212 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 13213 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
13214 | } |
13215 | else | |
13216 | { | |
13217 | /* Terminal frame. In this case, dvpos gives the number of | |
13218 | lines to scroll by; dvpos < 0 means scroll up. */ | |
13219 | int first_unchanged_at_end_vpos | |
13220 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
da8b7f4f KS |
13221 | int from = WINDOW_TOP_EDGE_LINE (w) + first_unchanged_at_end_vpos; |
13222 | int end = (WINDOW_TOP_EDGE_LINE (w) | |
522ed7fb GM |
13223 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) |
13224 | + window_internal_height (w)); | |
2311178e | 13225 | |
5f5c8ee5 GM |
13226 | /* Perform the operation on the screen. */ |
13227 | if (dvpos > 0) | |
13228 | { | |
13229 | /* Scroll last_unchanged_at_beg_row to the end of the | |
13230 | window down dvpos lines. */ | |
13231 | set_terminal_window (end); | |
13232 | ||
13233 | /* On dumb terminals delete dvpos lines at the end | |
13234 | before inserting dvpos empty lines. */ | |
13235 | if (!scroll_region_ok) | |
13236 | ins_del_lines (end - dvpos, -dvpos); | |
13237 | ||
13238 | /* Insert dvpos empty lines in front of | |
13239 | last_unchanged_at_beg_row. */ | |
13240 | ins_del_lines (from, dvpos); | |
13241 | } | |
13242 | else if (dvpos < 0) | |
13243 | { | |
13244 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
13245 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
13246 | set_terminal_window (end); | |
13247 | ||
13248 | /* Delete dvpos lines in front of | |
13249 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
13250 | the cursor to the given vpos and emit |dvpos| delete | |
13251 | line sequences. */ | |
13252 | ins_del_lines (from + dvpos, dvpos); | |
13253 | ||
13254 | /* On a dumb terminal insert dvpos empty lines at the | |
13255 | end. */ | |
13256 | if (!scroll_region_ok) | |
13257 | ins_del_lines (end + dvpos, -dvpos); | |
13258 | } | |
2311178e | 13259 | |
5f5c8ee5 GM |
13260 | set_terminal_window (0); |
13261 | } | |
2311178e | 13262 | |
5f5c8ee5 GM |
13263 | update_end (f); |
13264 | } | |
13265 | ||
ca42b2e8 GM |
13266 | /* Shift reused rows of the current matrix to the right position. |
13267 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
13268 | text. */ | |
13269 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
13270 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
13271 | if (dvpos < 0) |
13272 | { | |
13273 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
13274 | bottom_vpos, dvpos); | |
13275 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
13276 | bottom_vpos, 0); | |
13277 | } | |
13278 | else if (dvpos > 0) | |
13279 | { | |
13280 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
13281 | bottom_vpos, dvpos); | |
13282 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
13283 | first_unchanged_at_end_vpos + dvpos, 0); | |
13284 | } | |
13285 | ||
13286 | /* For frame-based redisplay, make sure that current frame and window | |
13287 | matrix are in sync with respect to glyph memory. */ | |
13288 | if (!FRAME_WINDOW_P (f)) | |
13289 | sync_frame_with_window_matrix_rows (w); | |
13290 | ||
13291 | /* Adjust buffer positions in reused rows. */ | |
13292 | if (delta) | |
f2d86d7a GM |
13293 | increment_matrix_positions (current_matrix, |
13294 | first_unchanged_at_end_vpos + dvpos, | |
13295 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
13296 | |
13297 | /* Adjust Y positions. */ | |
13298 | if (dy) | |
13299 | shift_glyph_matrix (w, current_matrix, | |
13300 | first_unchanged_at_end_vpos + dvpos, | |
13301 | bottom_vpos, dy); | |
13302 | ||
13303 | if (first_unchanged_at_end_row) | |
13304 | first_unchanged_at_end_row += dvpos; | |
13305 | ||
13306 | /* If scrolling up, there may be some lines to display at the end of | |
13307 | the window. */ | |
13308 | last_text_row_at_end = NULL; | |
13309 | if (dy < 0) | |
13310 | { | |
9c6ba6d1 GM |
13311 | /* Scrolling up can leave for example a partially visible line |
13312 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
13313 | /* Set last_row to the glyph row in the current matrix where the |
13314 | window end line is found. It has been moved up or down in | |
13315 | the matrix by dvpos. */ | |
13316 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
13317 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
13318 | ||
13319 | /* If last_row is the window end line, it should display text. */ | |
13320 | xassert (last_row->displays_text_p); | |
13321 | ||
13322 | /* If window end line was partially visible before, begin | |
13323 | displaying at that line. Otherwise begin displaying with the | |
13324 | line following it. */ | |
13325 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
13326 | { | |
13327 | init_to_row_start (&it, w, last_row); | |
13328 | it.vpos = last_vpos; | |
13329 | it.current_y = last_row->y; | |
13330 | } | |
13331 | else | |
13332 | { | |
13333 | init_to_row_end (&it, w, last_row); | |
13334 | it.vpos = 1 + last_vpos; | |
13335 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
13336 | ++last_row; | |
13337 | } | |
12adba34 | 13338 | |
23e8bd86 GM |
13339 | /* We may start in a continuation line. If so, we have to |
13340 | get the right continuation_lines_width and current_x. */ | |
13341 | it.continuation_lines_width = last_row->continuation_lines_width; | |
13342 | it.hpos = it.current_x = 0; | |
2311178e | 13343 | |
23e8bd86 GM |
13344 | /* Display the rest of the lines at the window end. */ |
13345 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
13346 | while (it.current_y < it.last_visible_y | |
13347 | && !fonts_changed_p) | |
5f5c8ee5 | 13348 | { |
23e8bd86 GM |
13349 | /* Is it always sure that the display agrees with lines in |
13350 | the current matrix? I don't think so, so we mark rows | |
13351 | displayed invalid in the current matrix by setting their | |
13352 | enabled_p flag to zero. */ | |
13353 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
13354 | if (display_line (&it)) | |
13355 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
13356 | } |
13357 | } | |
12adba34 | 13358 | |
5f5c8ee5 GM |
13359 | /* Update window_end_pos and window_end_vpos. */ |
13360 | if (first_unchanged_at_end_row | |
13361 | && first_unchanged_at_end_row->y < it.last_visible_y | |
13362 | && !last_text_row_at_end) | |
13363 | { | |
13364 | /* Window end line if one of the preserved rows from the current | |
13365 | matrix. Set row to the last row displaying text in current | |
13366 | matrix starting at first_unchanged_at_end_row, after | |
13367 | scrolling. */ | |
13368 | xassert (first_unchanged_at_end_row->displays_text_p); | |
13369 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
13370 | first_unchanged_at_end_row); | |
13371 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
2311178e | 13372 | |
ac90c44f | 13373 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 13374 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
13375 | w->window_end_vpos |
13376 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 13377 | xassert (w->window_end_bytepos >= 0); |
0416532f | 13378 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
13379 | } |
13380 | else if (last_text_row_at_end) | |
13381 | { | |
ac90c44f GM |
13382 | w->window_end_pos |
13383 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
13384 | w->window_end_bytepos |
13385 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
13386 | w->window_end_vpos |
13387 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 13388 | xassert (w->window_end_bytepos >= 0); |
0416532f | 13389 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
13390 | } |
13391 | else if (last_text_row) | |
13392 | { | |
13393 | /* We have displayed either to the end of the window or at the | |
13394 | end of the window, i.e. the last row with text is to be found | |
13395 | in the desired matrix. */ | |
ac90c44f GM |
13396 | w->window_end_pos |
13397 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
13398 | w->window_end_bytepos |
13399 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
13400 | w->window_end_vpos |
13401 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 13402 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
13403 | } |
13404 | else if (first_unchanged_at_end_row == NULL | |
13405 | && last_text_row == NULL | |
13406 | && last_text_row_at_end == NULL) | |
13407 | { | |
13408 | /* Displayed to end of window, but no line containing text was | |
13409 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
13410 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
13411 | int vpos = XFASTINT (w->window_end_vpos); | |
13412 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
13413 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
13414 | ||
13415 | for (row = NULL; | |
13416 | row == NULL && vpos >= first_vpos; | |
13417 | --vpos, --current_row, --desired_row) | |
13418 | { | |
13419 | if (desired_row->enabled_p) | |
13420 | { | |
13421 | if (desired_row->displays_text_p) | |
13422 | row = desired_row; | |
13423 | } | |
13424 | else if (current_row->displays_text_p) | |
13425 | row = current_row; | |
13426 | } | |
12adba34 | 13427 | |
0416532f | 13428 | xassert (row != NULL); |
d88a79d4 | 13429 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
13430 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
13431 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 13432 | xassert (w->window_end_bytepos >= 0); |
0416532f | 13433 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
13434 | } |
13435 | else | |
13436 | abort (); | |
ac90c44f | 13437 | |
8cdb267e GM |
13438 | #if 0 /* This leads to problems, for instance when the cursor is |
13439 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
13440 | /* Disable rows below what's displayed in the window. This makes |
13441 | debugging easier. */ | |
13442 | enable_glyph_matrix_rows (current_matrix, | |
13443 | XFASTINT (w->window_end_vpos) + 1, | |
13444 | bottom_vpos, 0); | |
8cdb267e | 13445 | #endif |
23e8bd86 | 13446 | |
5f5c8ee5 GM |
13447 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
13448 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 13449 | |
5f5c8ee5 GM |
13450 | /* Record that display has not been completed. */ |
13451 | w->window_end_valid = Qnil; | |
13452 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 13453 | return 3; |
27d16f05 GM |
13454 | |
13455 | #undef GIVE_UP | |
12adba34 | 13456 | } |
0f9c0ff0 | 13457 | |
a2889657 | 13458 | |
5f5c8ee5 GM |
13459 | \f |
13460 | /*********************************************************************** | |
13461 | More debugging support | |
13462 | ***********************************************************************/ | |
a2889657 | 13463 | |
5f5c8ee5 | 13464 | #if GLYPH_DEBUG |
a2889657 | 13465 | |
eaaa65b0 | 13466 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 13467 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 13468 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 13469 | |
31b24551 | 13470 | |
9ab436b9 | 13471 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 13472 | |
9ab436b9 GM |
13473 | GLYPHS 0 means don't show glyph contents. |
13474 | GLYPHS 1 means show glyphs in short form | |
13475 | GLYPHS > 1 means show glyphs in long form. */ | |
13476 | ||
13477 | void | |
13478 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 13479 | struct glyph_matrix *matrix; |
9ab436b9 | 13480 | int glyphs; |
5f5c8ee5 | 13481 | { |
efc63ef0 | 13482 | int i; |
5f5c8ee5 | 13483 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 13484 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 13485 | } |
31b24551 | 13486 | |
68a37fa8 | 13487 | |
e187cf71 GM |
13488 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
13489 | the glyph row and area where the glyph comes from. */ | |
13490 | ||
13491 | void | |
13492 | dump_glyph (row, glyph, area) | |
13493 | struct glyph_row *row; | |
13494 | struct glyph *glyph; | |
13495 | int area; | |
13496 | { | |
13497 | if (glyph->type == CHAR_GLYPH) | |
13498 | { | |
13499 | fprintf (stderr, | |
13500 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
13501 | glyph - row->glyphs[TEXT_AREA], | |
13502 | 'C', | |
13503 | glyph->charpos, | |
13504 | (BUFFERP (glyph->object) | |
13505 | ? 'B' | |
13506 | : (STRINGP (glyph->object) | |
13507 | ? 'S' | |
13508 | : '-')), | |
13509 | glyph->pixel_width, | |
13510 | glyph->u.ch, | |
13511 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
13512 | ? glyph->u.ch | |
13513 | : '.'), | |
13514 | glyph->face_id, | |
13515 | glyph->left_box_line_p, | |
13516 | glyph->right_box_line_p); | |
13517 | } | |
13518 | else if (glyph->type == STRETCH_GLYPH) | |
13519 | { | |
13520 | fprintf (stderr, | |
13521 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
13522 | glyph - row->glyphs[TEXT_AREA], | |
13523 | 'S', | |
13524 | glyph->charpos, | |
13525 | (BUFFERP (glyph->object) | |
13526 | ? 'B' | |
13527 | : (STRINGP (glyph->object) | |
13528 | ? 'S' | |
13529 | : '-')), | |
13530 | glyph->pixel_width, | |
13531 | 0, | |
13532 | '.', | |
13533 | glyph->face_id, | |
13534 | glyph->left_box_line_p, | |
13535 | glyph->right_box_line_p); | |
13536 | } | |
13537 | else if (glyph->type == IMAGE_GLYPH) | |
13538 | { | |
13539 | fprintf (stderr, | |
13540 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
13541 | glyph - row->glyphs[TEXT_AREA], | |
13542 | 'I', | |
13543 | glyph->charpos, | |
13544 | (BUFFERP (glyph->object) | |
13545 | ? 'B' | |
13546 | : (STRINGP (glyph->object) | |
13547 | ? 'S' | |
13548 | : '-')), | |
13549 | glyph->pixel_width, | |
13550 | glyph->u.img_id, | |
13551 | '.', | |
13552 | glyph->face_id, | |
13553 | glyph->left_box_line_p, | |
13554 | glyph->right_box_line_p); | |
13555 | } | |
13556 | } | |
13557 | ||
13558 | ||
5f5c8ee5 | 13559 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
13560 | GLYPHS 0 means don't show glyph contents. |
13561 | GLYPHS 1 means show glyphs in short form | |
13562 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 13563 | |
5f5c8ee5 | 13564 | void |
eaaa65b0 GM |
13565 | dump_glyph_row (row, vpos, glyphs) |
13566 | struct glyph_row *row; | |
9ab436b9 | 13567 | int vpos, glyphs; |
5f5c8ee5 | 13568 | { |
9ab436b9 GM |
13569 | if (glyphs != 1) |
13570 | { | |
b94c0d9c | 13571 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n"); |
9ab436b9 | 13572 | fprintf (stderr, "=======================================================================\n"); |
2311178e | 13573 | |
0ad38729 | 13574 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 13575 | %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 | 13576 | vpos, |
9ab436b9 GM |
13577 | MATRIX_ROW_START_CHARPOS (row), |
13578 | MATRIX_ROW_END_CHARPOS (row), | |
13579 | row->used[TEXT_AREA], | |
13580 | row->contains_overlapping_glyphs_p, | |
13581 | row->enabled_p, | |
9ab436b9 GM |
13582 | row->truncated_on_left_p, |
13583 | row->truncated_on_right_p, | |
13584 | row->overlay_arrow_p, | |
13585 | row->continued_p, | |
13586 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
13587 | row->displays_text_p, | |
13588 | row->ends_at_zv_p, | |
13589 | row->fill_line_p, | |
13590 | row->ends_in_middle_of_char_p, | |
13591 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 13592 | row->mouse_face_p, |
9ab436b9 GM |
13593 | row->x, |
13594 | row->y, | |
13595 | row->pixel_width, | |
13596 | row->height, | |
13597 | row->visible_height, | |
13598 | row->ascent, | |
13599 | row->phys_ascent); | |
33ea6c4d GM |
13600 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
13601 | row->end.overlay_string_index, | |
13602 | row->continuation_lines_width); | |
9ab436b9 GM |
13603 | fprintf (stderr, "%9d %5d\n", |
13604 | CHARPOS (row->start.string_pos), | |
13605 | CHARPOS (row->end.string_pos)); | |
13606 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
13607 | row->end.dpvec_index); | |
13608 | } | |
2311178e | 13609 | |
9ab436b9 | 13610 | if (glyphs > 1) |
bd66d1ba | 13611 | { |
e187cf71 GM |
13612 | int area; |
13613 | ||
13614 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
13615 | { | |
091f8878 GM |
13616 | struct glyph *glyph = row->glyphs[area]; |
13617 | struct glyph *glyph_end = glyph + row->used[area]; | |
2311178e | 13618 | |
e187cf71 | 13619 | /* Glyph for a line end in text. */ |
091f8878 | 13620 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 13621 | ++glyph_end; |
2311178e | 13622 | |
e187cf71 GM |
13623 | if (glyph < glyph_end) |
13624 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
2311178e | 13625 | |
e187cf71 GM |
13626 | for (; glyph < glyph_end; ++glyph) |
13627 | dump_glyph (row, glyph, area); | |
f7b4b63a | 13628 | } |
f4faa47c | 13629 | } |
9ab436b9 GM |
13630 | else if (glyphs == 1) |
13631 | { | |
e187cf71 | 13632 | int area; |
9ab436b9 | 13633 | |
e187cf71 | 13634 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 13635 | { |
e187cf71 GM |
13636 | char *s = (char *) alloca (row->used[area] + 1); |
13637 | int i; | |
13638 | ||
13639 | for (i = 0; i < row->used[area]; ++i) | |
13640 | { | |
13641 | struct glyph *glyph = row->glyphs[area] + i; | |
13642 | if (glyph->type == CHAR_GLYPH | |
13643 | && glyph->u.ch < 0x80 | |
13644 | && glyph->u.ch >= ' ') | |
13645 | s[i] = glyph->u.ch; | |
13646 | else | |
13647 | s[i] = '.'; | |
13648 | } | |
2311178e | 13649 | |
e187cf71 GM |
13650 | s[i] = '\0'; |
13651 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
13652 | } | |
9ab436b9 | 13653 | } |
5f5c8ee5 | 13654 | } |
f4faa47c | 13655 | |
a2889657 | 13656 | |
5f5c8ee5 GM |
13657 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
13658 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 13659 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
13660 | Shows contents of glyph row structures. With non-nil |
13661 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
13662 | glyphs in short form, otherwise show glyphs in long form. */) |
13663 | (glyphs) | |
9ab436b9 | 13664 | Lisp_Object glyphs; |
5f5c8ee5 GM |
13665 | { |
13666 | struct window *w = XWINDOW (selected_window); | |
13667 | struct buffer *buffer = XBUFFER (w->buffer); | |
13668 | ||
13669 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
13670 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
13671 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
13672 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
13673 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
13674 | dump_glyph_matrix (w->current_matrix, |
13675 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
13676 | return Qnil; |
13677 | } | |
1c2250c2 | 13678 | |
1fca3fae | 13679 | |
7d4cc828 GM |
13680 | DEFUN ("dump-frame-glyph-matrix", Fdump_frame_glyph_matrix, |
13681 | Sdump_frame_glyph_matrix, 0, 0, "", doc: /* */) | |
13682 | () | |
13683 | { | |
13684 | struct frame *f = XFRAME (selected_frame); | |
13685 | dump_glyph_matrix (f->current_matrix, 1); | |
13686 | return Qnil; | |
13687 | } | |
13688 | ||
13689 | ||
e9abc296 | 13690 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 13691 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
13692 | GLYPH 0 means don't dump glyphs. |
13693 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
13694 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
13695 | (row, glyphs) | |
e9abc296 | 13696 | Lisp_Object row, glyphs; |
5f5c8ee5 | 13697 | { |
eaaa65b0 GM |
13698 | struct glyph_matrix *matrix; |
13699 | int vpos; | |
2311178e | 13700 | |
b7826503 | 13701 | CHECK_NUMBER (row); |
eaaa65b0 GM |
13702 | matrix = XWINDOW (selected_window)->current_matrix; |
13703 | vpos = XINT (row); | |
13704 | if (vpos >= 0 && vpos < matrix->nrows) | |
13705 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
13706 | vpos, | |
13707 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
13708 | return Qnil; |
13709 | } | |
1fca3fae | 13710 | |
67481ae5 | 13711 | |
b94c0d9c | 13712 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 13713 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
13714 | GLYPH 0 means don't dump glyphs. |
13715 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
13716 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
13717 | (row, glyphs) | |
b94c0d9c | 13718 | Lisp_Object row, glyphs; |
5f5c8ee5 | 13719 | { |
886bd6f2 | 13720 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
13721 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
13722 | int vpos; | |
2311178e | 13723 | |
b7826503 | 13724 | CHECK_NUMBER (row); |
eaaa65b0 GM |
13725 | vpos = XINT (row); |
13726 | if (vpos >= 0 && vpos < m->nrows) | |
13727 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
13728 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
13729 | return Qnil; |
13730 | } | |
ca26e1c8 | 13731 | |
0f9c0ff0 | 13732 | |
62397849 | 13733 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
13734 | doc: /* Toggle tracing of redisplay. |
13735 | With ARG, turn tracing on if and only if ARG is positive. */) | |
13736 | (arg) | |
62397849 | 13737 | Lisp_Object arg; |
5f5c8ee5 | 13738 | { |
62397849 GM |
13739 | if (NILP (arg)) |
13740 | trace_redisplay_p = !trace_redisplay_p; | |
13741 | else | |
13742 | { | |
13743 | arg = Fprefix_numeric_value (arg); | |
13744 | trace_redisplay_p = XINT (arg) > 0; | |
13745 | } | |
2311178e | 13746 | |
5f5c8ee5 GM |
13747 | return Qnil; |
13748 | } | |
bf9249e3 GM |
13749 | |
13750 | ||
f4a374a1 | 13751 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
e9757d41 SM |
13752 | doc: /* Like `format', but print result to stderr. |
13753 | usage: (trace-to-stderr STRING &rest OBJECTS) */) | |
7ee72033 | 13754 | (nargs, args) |
f4a374a1 GM |
13755 | int nargs; |
13756 | Lisp_Object *args; | |
bf9249e3 | 13757 | { |
f4a374a1 | 13758 | Lisp_Object s = Fformat (nargs, args); |
2051c264 | 13759 | fprintf (stderr, "%s", SDATA (s)); |
bf9249e3 GM |
13760 | return Qnil; |
13761 | } | |
2311178e | 13762 | |
5f5c8ee5 | 13763 | #endif /* GLYPH_DEBUG */ |
ca26e1c8 | 13764 | |
ca26e1c8 | 13765 | |
5f5c8ee5 GM |
13766 | \f |
13767 | /*********************************************************************** | |
13768 | Building Desired Matrix Rows | |
13769 | ***********************************************************************/ | |
a2889657 | 13770 | |
5f5c8ee5 GM |
13771 | /* Return a temporary glyph row holding the glyphs of an overlay |
13772 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 13773 | |
5f5c8ee5 GM |
13774 | static struct glyph_row * |
13775 | get_overlay_arrow_glyph_row (w) | |
13776 | struct window *w; | |
13777 | { | |
13778 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
13779 | struct buffer *buffer = XBUFFER (w->buffer); | |
13780 | struct buffer *old = current_buffer; | |
50f80c2f | 13781 | const unsigned char *arrow_string = SDATA (Voverlay_arrow_string); |
2051c264 | 13782 | int arrow_len = SCHARS (Voverlay_arrow_string); |
50f80c2f KR |
13783 | const unsigned char *arrow_end = arrow_string + arrow_len; |
13784 | const unsigned char *p; | |
5f5c8ee5 GM |
13785 | struct it it; |
13786 | int multibyte_p; | |
13787 | int n_glyphs_before; | |
13788 | ||
13789 | set_buffer_temp (buffer); | |
13790 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
13791 | it.glyph_row->used[TEXT_AREA] = 0; | |
13792 | SET_TEXT_POS (it.position, 0, 0); | |
13793 | ||
13794 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
13795 | p = arrow_string; | |
13796 | while (p < arrow_end) | |
13797 | { | |
13798 | Lisp_Object face, ilisp; | |
2311178e | 13799 | |
5f5c8ee5 GM |
13800 | /* Get the next character. */ |
13801 | if (multibyte_p) | |
4fdb80f2 | 13802 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
13803 | else |
13804 | it.c = *p, it.len = 1; | |
13805 | p += it.len; | |
2311178e | 13806 | |
5f5c8ee5 | 13807 | /* Get its face. */ |
ac90c44f | 13808 | ilisp = make_number (p - arrow_string); |
5f5c8ee5 GM |
13809 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
13810 | it.face_id = compute_char_face (f, it.c, face); | |
13811 | ||
13812 | /* Compute its width, get its glyphs. */ | |
13813 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 13814 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
13815 | PRODUCE_GLYPHS (&it); |
13816 | ||
13817 | /* If this character doesn't fit any more in the line, we have | |
13818 | to remove some glyphs. */ | |
13819 | if (it.current_x > it.last_visible_x) | |
13820 | { | |
13821 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
13822 | break; | |
13823 | } | |
13824 | } | |
2311178e | 13825 | |
5f5c8ee5 GM |
13826 | set_buffer_temp (old); |
13827 | return it.glyph_row; | |
13828 | } | |
ca26e1c8 | 13829 | |
b0a0fbda | 13830 | |
5f5c8ee5 GM |
13831 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
13832 | glyphs are only inserted for terminal frames since we can't really | |
13833 | win with truncation glyphs when partially visible glyphs are | |
13834 | involved. Which glyphs to insert is determined by | |
13835 | produce_special_glyphs. */ | |
67481ae5 | 13836 | |
5f5c8ee5 GM |
13837 | static void |
13838 | insert_left_trunc_glyphs (it) | |
13839 | struct it *it; | |
13840 | { | |
13841 | struct it truncate_it; | |
13842 | struct glyph *from, *end, *to, *toend; | |
13843 | ||
13844 | xassert (!FRAME_WINDOW_P (it->f)); | |
13845 | ||
13846 | /* Get the truncation glyphs. */ | |
13847 | truncate_it = *it; | |
5f5c8ee5 GM |
13848 | truncate_it.current_x = 0; |
13849 | truncate_it.face_id = DEFAULT_FACE_ID; | |
13850 | truncate_it.glyph_row = &scratch_glyph_row; | |
13851 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
13852 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 13853 | truncate_it.object = make_number (0); |
5f5c8ee5 | 13854 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
2311178e | 13855 | |
5f5c8ee5 GM |
13856 | /* Overwrite glyphs from IT with truncation glyphs. */ |
13857 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
13858 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
13859 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
13860 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
13861 | ||
13862 | while (from < end) | |
13863 | *to++ = *from++; | |
13864 | ||
37be86f2 KH |
13865 | /* There may be padding glyphs left over. Overwrite them too. */ |
13866 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
13867 | { | |
13868 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
13869 | while (from < end) | |
13870 | *to++ = *from++; | |
13871 | } | |
5f5c8ee5 | 13872 | |
37be86f2 KH |
13873 | if (to > toend) |
13874 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 13875 | } |
e0bfbde6 | 13876 | |
e0bfbde6 | 13877 | |
5f5c8ee5 | 13878 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 13879 | |
5f5c8ee5 GM |
13880 | Most of the time, ascent and height of a display line will be equal |
13881 | to the max_ascent and max_height values of the display iterator | |
13882 | structure. This is not the case if | |
67481ae5 | 13883 | |
5f5c8ee5 GM |
13884 | 1. We hit ZV without displaying anything. In this case, max_ascent |
13885 | and max_height will be zero. | |
1c9241f5 | 13886 | |
5f5c8ee5 GM |
13887 | 2. We have some glyphs that don't contribute to the line height. |
13888 | (The glyph row flag contributes_to_line_height_p is for future | |
13889 | pixmap extensions). | |
f6fd109b | 13890 | |
5f5c8ee5 GM |
13891 | The first case is easily covered by using default values because in |
13892 | these cases, the line height does not really matter, except that it | |
13893 | must not be zero. */ | |
67481ae5 | 13894 | |
5f5c8ee5 GM |
13895 | static void |
13896 | compute_line_metrics (it) | |
13897 | struct it *it; | |
13898 | { | |
13899 | struct glyph_row *row = it->glyph_row; | |
13900 | int area, i; | |
1c2250c2 | 13901 | |
5f5c8ee5 GM |
13902 | if (FRAME_WINDOW_P (it->f)) |
13903 | { | |
75c5350a | 13904 | int i, min_y, max_y; |
1c2250c2 | 13905 | |
5f5c8ee5 GM |
13906 | /* The line may consist of one space only, that was added to |
13907 | place the cursor on it. If so, the row's height hasn't been | |
13908 | computed yet. */ | |
13909 | if (row->height == 0) | |
13910 | { | |
13911 | if (it->max_ascent + it->max_descent == 0) | |
da8b7f4f | 13912 | it->max_descent = it->max_phys_descent = FRAME_LINE_HEIGHT (it->f); |
5f5c8ee5 GM |
13913 | row->ascent = it->max_ascent; |
13914 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
13915 | row->phys_ascent = it->max_phys_ascent; |
13916 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 | 13917 | } |
2311178e | 13918 | |
5f5c8ee5 GM |
13919 | /* Compute the width of this line. */ |
13920 | row->pixel_width = row->x; | |
13921 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
13922 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
13923 | ||
13924 | xassert (row->pixel_width >= 0); | |
13925 | xassert (row->ascent >= 0 && row->height > 0); | |
13926 | ||
312246d1 GM |
13927 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
13928 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
13929 | ||
13930 | /* If first line's physical ascent is larger than its logical | |
13931 | ascent, use the physical ascent, and make the row taller. | |
13932 | This makes accented characters fully visible. */ | |
b28cb6ed | 13933 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
13934 | && row->phys_ascent > row->ascent) |
13935 | { | |
13936 | row->height += row->phys_ascent - row->ascent; | |
13937 | row->ascent = row->phys_ascent; | |
13938 | } | |
13939 | ||
5f5c8ee5 GM |
13940 | /* Compute how much of the line is visible. */ |
13941 | row->visible_height = row->height; | |
2311178e | 13942 | |
da8b7f4f KS |
13943 | min_y = WINDOW_HEADER_LINE_HEIGHT (it->w); |
13944 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (it->w); | |
75c5350a GM |
13945 | |
13946 | if (row->y < min_y) | |
13947 | row->visible_height -= min_y - row->y; | |
13948 | if (row->y + row->height > max_y) | |
13949 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
13950 | } |
13951 | else | |
13952 | { | |
13953 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
13954 | if (row->continued_p) |
13955 | row->pixel_width -= it->continuation_pixel_width; | |
13956 | else if (row->truncated_on_right_p) | |
13957 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
13958 | row->ascent = row->phys_ascent = 0; |
13959 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 13960 | } |
67481ae5 | 13961 | |
5f5c8ee5 GM |
13962 | /* Compute a hash code for this row. */ |
13963 | row->hash = 0; | |
13964 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
13965 | for (i = 0; i < row->used[area]; ++i) | |
13966 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
13967 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
13968 | + row->glyphs[area][i].face_id |
13969 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 13970 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 13971 | |
5f5c8ee5 | 13972 | it->max_ascent = it->max_descent = 0; |
312246d1 | 13973 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 13974 | } |
12adba34 | 13975 | |
ca26e1c8 | 13976 | |
5f5c8ee5 GM |
13977 | /* Append one space to the glyph row of iterator IT if doing a |
13978 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
13979 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 13980 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
13981 | |
13982 | This function is called to make sure that there is always one glyph | |
13983 | at the end of a glyph row that the cursor can be set on under | |
13984 | window-systems. (If there weren't such a glyph we would not know | |
13985 | how wide and tall a box cursor should be displayed). | |
13986 | ||
13987 | At the same time this space let's a nicely handle clearing to the | |
13988 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 13989 | |
80c6cb1f | 13990 | static int |
5f5c8ee5 GM |
13991 | append_space (it, default_face_p) |
13992 | struct it *it; | |
13993 | int default_face_p; | |
13994 | { | |
13995 | if (FRAME_WINDOW_P (it->f)) | |
13996 | { | |
13997 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 13998 | |
5f5c8ee5 GM |
13999 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
14000 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 14001 | { |
cafafe0b GM |
14002 | /* Save some values that must not be changed. |
14003 | Must save IT->c and IT->len because otherwise | |
14004 | ITERATOR_AT_END_P wouldn't work anymore after | |
14005 | append_space has been called. */ | |
478d746b | 14006 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
14007 | int saved_c = it->c, saved_len = it->len; |
14008 | int saved_x = it->current_x; | |
5f5c8ee5 | 14009 | int saved_face_id = it->face_id; |
cafafe0b | 14010 | struct text_pos saved_pos; |
5f5c8ee5 | 14011 | Lisp_Object saved_object; |
980806b6 | 14012 | struct face *face; |
5f5c8ee5 GM |
14013 | |
14014 | saved_object = it->object; | |
14015 | saved_pos = it->position; | |
2311178e | 14016 | |
5f5c8ee5 GM |
14017 | it->what = IT_CHARACTER; |
14018 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 14019 | it->object = make_number (0); |
5f5c8ee5 GM |
14020 | it->c = ' '; |
14021 | it->len = 1; | |
5f5c8ee5 GM |
14022 | |
14023 | if (default_face_p) | |
14024 | it->face_id = DEFAULT_FACE_ID; | |
4aad61f8 GM |
14025 | else if (it->face_before_selective_p) |
14026 | it->face_id = it->saved_face_id; | |
980806b6 KH |
14027 | face = FACE_FROM_ID (it->f, it->face_id); |
14028 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 14029 | |
5f5c8ee5 | 14030 | PRODUCE_GLYPHS (it); |
2311178e | 14031 | |
5f5c8ee5 GM |
14032 | it->current_x = saved_x; |
14033 | it->object = saved_object; | |
14034 | it->position = saved_pos; | |
14035 | it->what = saved_what; | |
14036 | it->face_id = saved_face_id; | |
cafafe0b GM |
14037 | it->len = saved_len; |
14038 | it->c = saved_c; | |
80c6cb1f | 14039 | return 1; |
5f5c8ee5 GM |
14040 | } |
14041 | } | |
80c6cb1f GM |
14042 | |
14043 | return 0; | |
5f5c8ee5 | 14044 | } |
12adba34 | 14045 | |
1842fc1a | 14046 | |
5f5c8ee5 GM |
14047 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
14048 | to the end of the display line. Called from display_line. | |
14049 | If the glyph row is empty, add a space glyph to it so that we | |
14050 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
2311178e | 14051 | |
5f5c8ee5 GM |
14052 | static void |
14053 | extend_face_to_end_of_line (it) | |
14054 | struct it *it; | |
14055 | { | |
14056 | struct face *face; | |
14057 | struct frame *f = it->f; | |
1842fc1a | 14058 | |
5f5c8ee5 GM |
14059 | /* If line is already filled, do nothing. */ |
14060 | if (it->current_x >= it->last_visible_x) | |
14061 | return; | |
2311178e | 14062 | |
5f5c8ee5 GM |
14063 | /* Face extension extends the background and box of IT->face_id |
14064 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
14065 | of the frame, we don't have to do anything. */ |
14066 | if (it->face_before_selective_p) | |
14067 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
14068 | else | |
14069 | face = FACE_FROM_ID (f, it->face_id); | |
2311178e | 14070 | |
5f5c8ee5 GM |
14071 | if (FRAME_WINDOW_P (f) |
14072 | && face->box == FACE_NO_BOX | |
14073 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
14074 | && !face->stipple) | |
14075 | return; | |
1842fc1a | 14076 | |
5f5c8ee5 GM |
14077 | /* Set the glyph row flag indicating that the face of the last glyph |
14078 | in the text area has to be drawn to the end of the text area. */ | |
14079 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 14080 | |
980806b6 KH |
14081 | /* If current character of IT is not ASCII, make sure we have the |
14082 | ASCII face. This will be automatically undone the next time | |
14083 | get_next_display_element returns a multibyte character. Note | |
14084 | that the character will always be single byte in unibyte text. */ | |
14085 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 14086 | { |
980806b6 | 14087 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 14088 | } |
545e04f6 | 14089 | |
5f5c8ee5 GM |
14090 | if (FRAME_WINDOW_P (f)) |
14091 | { | |
14092 | /* If the row is empty, add a space with the current face of IT, | |
14093 | so that we know which face to draw. */ | |
14094 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 14095 | { |
5f5c8ee5 | 14096 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 14097 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 14098 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 14099 | } |
5f5c8ee5 GM |
14100 | } |
14101 | else | |
14102 | { | |
14103 | /* Save some values that must not be changed. */ | |
14104 | int saved_x = it->current_x; | |
14105 | struct text_pos saved_pos; | |
14106 | Lisp_Object saved_object; | |
478d746b | 14107 | enum display_element_type saved_what = it->what; |
4aad61f8 | 14108 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
14109 | |
14110 | saved_object = it->object; | |
14111 | saved_pos = it->position; | |
2311178e | 14112 | |
5f5c8ee5 GM |
14113 | it->what = IT_CHARACTER; |
14114 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 14115 | it->object = make_number (0); |
5f5c8ee5 GM |
14116 | it->c = ' '; |
14117 | it->len = 1; | |
4aad61f8 | 14118 | it->face_id = face->id; |
2311178e | 14119 | |
5f5c8ee5 | 14120 | PRODUCE_GLYPHS (it); |
2311178e | 14121 | |
5f5c8ee5 GM |
14122 | while (it->current_x <= it->last_visible_x) |
14123 | PRODUCE_GLYPHS (it); | |
2311178e | 14124 | |
5f5c8ee5 GM |
14125 | /* Don't count these blanks really. It would let us insert a left |
14126 | truncation glyph below and make us set the cursor on them, maybe. */ | |
14127 | it->current_x = saved_x; | |
14128 | it->object = saved_object; | |
14129 | it->position = saved_pos; | |
14130 | it->what = saved_what; | |
4aad61f8 | 14131 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
14132 | } |
14133 | } | |
12adba34 | 14134 | |
545e04f6 | 14135 | |
5f5c8ee5 GM |
14136 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
14137 | trailing whitespace. */ | |
1c9241f5 | 14138 | |
5f5c8ee5 GM |
14139 | static int |
14140 | trailing_whitespace_p (charpos) | |
14141 | int charpos; | |
14142 | { | |
14143 | int bytepos = CHAR_TO_BYTE (charpos); | |
14144 | int c = 0; | |
7bbe686f | 14145 | |
5f5c8ee5 GM |
14146 | while (bytepos < ZV_BYTE |
14147 | && (c = FETCH_CHAR (bytepos), | |
14148 | c == ' ' || c == '\t')) | |
14149 | ++bytepos; | |
0d09d1e6 | 14150 | |
8f897821 GM |
14151 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
14152 | { | |
14153 | if (bytepos != PT_BYTE) | |
14154 | return 1; | |
14155 | } | |
14156 | return 0; | |
5f5c8ee5 | 14157 | } |
31b24551 | 14158 | |
545e04f6 | 14159 | |
5f5c8ee5 | 14160 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 14161 | |
5f5c8ee5 GM |
14162 | void |
14163 | highlight_trailing_whitespace (f, row) | |
14164 | struct frame *f; | |
14165 | struct glyph_row *row; | |
14166 | { | |
14167 | int used = row->used[TEXT_AREA]; | |
2311178e | 14168 | |
5f5c8ee5 GM |
14169 | if (used) |
14170 | { | |
14171 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
14172 | struct glyph *glyph = start + used - 1; | |
14173 | ||
ade0bee1 GM |
14174 | /* Skip over glyphs inserted to display the cursor at the |
14175 | end of a line, for extending the face of the last glyph | |
14176 | to the end of the line on terminals, and for truncation | |
14177 | and continuation glyphs. */ | |
65008712 GM |
14178 | while (glyph >= start |
14179 | && glyph->type == CHAR_GLYPH | |
65008712 | 14180 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
14181 | --glyph; |
14182 | ||
14183 | /* If last glyph is a space or stretch, and it's trailing | |
14184 | whitespace, set the face of all trailing whitespace glyphs in | |
14185 | IT->glyph_row to `trailing-whitespace'. */ | |
14186 | if (glyph >= start | |
14187 | && BUFFERP (glyph->object) | |
14188 | && (glyph->type == STRETCH_GLYPH | |
14189 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 14190 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 14191 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 14192 | { |
980806b6 | 14193 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
2311178e | 14194 | |
5f5c8ee5 GM |
14195 | while (glyph >= start |
14196 | && BUFFERP (glyph->object) | |
14197 | && (glyph->type == STRETCH_GLYPH | |
14198 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
14199 | && glyph->u.ch == ' '))) |
14200 | (glyph--)->face_id = face_id; | |
545e04f6 | 14201 | } |
a2889657 | 14202 | } |
5f5c8ee5 | 14203 | } |
a2889657 | 14204 | |
5fcbb24d | 14205 | |
cafafe0b | 14206 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 14207 | used to hold the cursor. */ |
cafafe0b GM |
14208 | |
14209 | static int | |
14210 | cursor_row_p (w, row) | |
14211 | struct window *w; | |
14212 | struct glyph_row *row; | |
14213 | { | |
9a038881 | 14214 | int cursor_row_p = 1; |
2311178e | 14215 | |
cafafe0b GM |
14216 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
14217 | { | |
9a038881 GM |
14218 | /* If the row ends with a newline from a string, we don't want |
14219 | the cursor there (if the row is continued it doesn't end in a | |
14220 | newline). */ | |
14221 | if (CHARPOS (row->end.string_pos) >= 0 | |
14222 | || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
14223 | cursor_row_p = row->continued_p; | |
14224 | ||
14225 | /* If the row ends at ZV, display the cursor at the end of that | |
14226 | row instead of at the start of the row below. */ | |
14227 | else if (row->ends_at_zv_p) | |
14228 | cursor_row_p = 1; | |
14229 | else | |
14230 | cursor_row_p = 0; | |
cafafe0b GM |
14231 | } |
14232 | ||
9a038881 | 14233 | return cursor_row_p; |
cafafe0b GM |
14234 | } |
14235 | ||
14236 | ||
5f5c8ee5 GM |
14237 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
14238 | IT->w from text at the current position of IT. See dispextern.h | |
14239 | for an overview of struct it. Value is non-zero if | |
14240 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
14241 | only. */ | |
2311178e | 14242 | |
5f5c8ee5 GM |
14243 | static int |
14244 | display_line (it) | |
14245 | struct it *it; | |
14246 | { | |
14247 | struct glyph_row *row = it->glyph_row; | |
14248 | ||
14249 | /* We always start displaying at hpos zero even if hscrolled. */ | |
14250 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 14251 | |
5f5c8ee5 GM |
14252 | /* We must not display in a row that's not a text row. */ |
14253 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
14254 | < it->w->desired_matrix->nrows); | |
12adba34 | 14255 | |
5f5c8ee5 GM |
14256 | /* Is IT->w showing the region? */ |
14257 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 14258 | |
5f5c8ee5 GM |
14259 | /* Clear the result glyph row and enable it. */ |
14260 | prepare_desired_row (row); | |
12adba34 | 14261 | |
5f5c8ee5 GM |
14262 | row->y = it->current_y; |
14263 | row->start = it->current; | |
14264 | row->continuation_lines_width = it->continuation_lines_width; | |
14265 | row->displays_text_p = 1; | |
91004049 GM |
14266 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
14267 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
14268 | |
14269 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
14270 | display_line on only one line at a time, in which case this | |
14271 | can't really hurt too much, or we call it on lines which appear | |
14272 | one after another in the buffer, in which case all calls to | |
14273 | recenter_overlay_lists but the first will be pretty cheap. */ | |
14274 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
14275 | ||
5f5c8ee5 GM |
14276 | /* Move over display elements that are not visible because we are |
14277 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
14278 | if the first glyph is partially visible or if we hit a line end. */ | |
14279 | if (it->current_x < it->first_visible_x) | |
14280 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
14281 | MOVE_TO_POS | MOVE_TO_X); | |
14282 | ||
14283 | /* Get the initial row height. This is either the height of the | |
14284 | text hscrolled, if there is any, or zero. */ | |
14285 | row->ascent = it->max_ascent; | |
14286 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
14287 | row->phys_ascent = it->max_phys_ascent; |
14288 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
14289 | |
14290 | /* Loop generating characters. The loop is left with IT on the next | |
14291 | character to display. */ | |
14292 | while (1) | |
14293 | { | |
14294 | int n_glyphs_before, hpos_before, x_before; | |
14295 | int x, i, nglyphs; | |
ae26e27d | 14296 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 14297 | |
5f5c8ee5 GM |
14298 | /* Retrieve the next thing to display. Value is zero if end of |
14299 | buffer reached. */ | |
14300 | if (!get_next_display_element (it)) | |
14301 | { | |
14302 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
14303 | display the cursor there under X. Set the charpos of the |
14304 | first glyph of blank lines not corresponding to any text | |
14305 | to -1. */ | |
14306 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
14307 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 14308 | { |
5f5c8ee5 GM |
14309 | row->glyphs[TEXT_AREA]->charpos = -1; |
14310 | row->displays_text_p = 0; | |
14311 | ||
2ad551af | 14312 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
14313 | && (!MINI_WINDOW_P (it->w) |
14314 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 14315 | row->indicate_empty_line_p = 1; |
a2889657 | 14316 | } |
2311178e | 14317 | |
5f5c8ee5 GM |
14318 | it->continuation_lines_width = 0; |
14319 | row->ends_at_zv_p = 1; | |
14320 | break; | |
a2889657 | 14321 | } |
a2889657 | 14322 | |
5f5c8ee5 GM |
14323 | /* Now, get the metrics of what we want to display. This also |
14324 | generates glyphs in `row' (which is IT->glyph_row). */ | |
14325 | n_glyphs_before = row->used[TEXT_AREA]; | |
14326 | x = it->current_x; | |
e6819faf GM |
14327 | |
14328 | /* Remember the line height so far in case the next element doesn't | |
14329 | fit on the line. */ | |
14330 | if (!it->truncate_lines_p) | |
14331 | { | |
14332 | ascent = it->max_ascent; | |
14333 | descent = it->max_descent; | |
14334 | phys_ascent = it->max_phys_ascent; | |
14335 | phys_descent = it->max_phys_descent; | |
14336 | } | |
2311178e | 14337 | |
5f5c8ee5 | 14338 | PRODUCE_GLYPHS (it); |
a2889657 | 14339 | |
5f5c8ee5 GM |
14340 | /* If this display element was in marginal areas, continue with |
14341 | the next one. */ | |
14342 | if (it->area != TEXT_AREA) | |
a2889657 | 14343 | { |
5f5c8ee5 GM |
14344 | row->ascent = max (row->ascent, it->max_ascent); |
14345 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
14346 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
14347 | row->phys_height = max (row->phys_height, | |
14348 | it->max_phys_ascent + it->max_phys_descent); | |
cafafe0b | 14349 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
14350 | continue; |
14351 | } | |
5936754e | 14352 | |
5f5c8ee5 GM |
14353 | /* Does the display element fit on the line? If we truncate |
14354 | lines, we should draw past the right edge of the window. If | |
14355 | we don't truncate, we want to stop so that we can display the | |
14356 | continuation glyph before the right margin. If lines are | |
14357 | continued, there are two possible strategies for characters | |
14358 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
14359 | glyphs as possible in this line and leave the rest for the | |
14360 | continuation line, or display the whole element in the next | |
14361 | line. Original redisplay did the former, so we do it also. */ | |
14362 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
14363 | hpos_before = it->hpos; | |
14364 | x_before = x; | |
4dcd74e6 | 14365 | |
4b41cebb | 14366 | if (/* Not a newline. */ |
4dcd74e6 | 14367 | nglyphs > 0 |
202c1b5b | 14368 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
14369 | && it->current_x < it->last_visible_x) |
14370 | { | |
37be86f2 | 14371 | it->hpos += nglyphs; |
5f5c8ee5 GM |
14372 | row->ascent = max (row->ascent, it->max_ascent); |
14373 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
14374 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
14375 | row->phys_height = max (row->phys_height, | |
14376 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
14377 | if (it->current_x - it->pixel_width < it->first_visible_x) |
14378 | row->x = x - it->first_visible_x; | |
14379 | } | |
14380 | else | |
14381 | { | |
14382 | int new_x; | |
14383 | struct glyph *glyph; | |
2311178e | 14384 | |
5f5c8ee5 | 14385 | for (i = 0; i < nglyphs; ++i, x = new_x) |
b5bbc9a5 | 14386 | { |
5f5c8ee5 GM |
14387 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
14388 | new_x = x + glyph->pixel_width; | |
14389 | ||
14390 | if (/* Lines are continued. */ | |
14391 | !it->truncate_lines_p | |
14392 | && (/* Glyph doesn't fit on the line. */ | |
14393 | new_x > it->last_visible_x | |
14394 | /* Or it fits exactly on a window system frame. */ | |
14395 | || (new_x == it->last_visible_x | |
14396 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 14397 | { |
5f5c8ee5 | 14398 | /* End of a continued line. */ |
2311178e | 14399 | |
5f5c8ee5 GM |
14400 | if (it->hpos == 0 |
14401 | || (new_x == it->last_visible_x | |
14402 | && FRAME_WINDOW_P (it->f))) | |
14403 | { | |
e6819faf GM |
14404 | /* Current glyph is the only one on the line or |
14405 | fits exactly on the line. We must continue | |
14406 | the line because we can't draw the cursor | |
14407 | after the glyph. */ | |
5f5c8ee5 GM |
14408 | row->continued_p = 1; |
14409 | it->current_x = new_x; | |
14410 | it->continuation_lines_width += new_x; | |
14411 | ++it->hpos; | |
14412 | if (i == nglyphs - 1) | |
cafafe0b | 14413 | set_iterator_to_next (it, 1); |
5f5c8ee5 | 14414 | } |
3b3c4bf0 GM |
14415 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
14416 | && !FRAME_WINDOW_P (it->f)) | |
14417 | { | |
14418 | /* A padding glyph that doesn't fit on this line. | |
14419 | This means the whole character doesn't fit | |
14420 | on the line. */ | |
14421 | row->used[TEXT_AREA] = n_glyphs_before; | |
2311178e | 14422 | |
3b3c4bf0 GM |
14423 | /* Fill the rest of the row with continuation |
14424 | glyphs like in 20.x. */ | |
14425 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
14426 | < row->glyphs[1 + TEXT_AREA]) | |
14427 | produce_special_glyphs (it, IT_CONTINUATION); | |
2311178e | 14428 | |
3b3c4bf0 GM |
14429 | row->continued_p = 1; |
14430 | it->current_x = x_before; | |
14431 | it->continuation_lines_width += x_before; | |
2311178e | 14432 | |
3b3c4bf0 GM |
14433 | /* Restore the height to what it was before the |
14434 | element not fitting on the line. */ | |
14435 | it->max_ascent = ascent; | |
14436 | it->max_descent = descent; | |
14437 | it->max_phys_ascent = phys_ascent; | |
14438 | it->max_phys_descent = phys_descent; | |
14439 | } | |
0df56f4d GM |
14440 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
14441 | { | |
14442 | /* A TAB that extends past the right edge of the | |
14443 | window. This produces a single glyph on | |
14444 | window system frames. We leave the glyph in | |
14445 | this row and let it fill the row, but don't | |
14446 | consume the TAB. */ | |
14447 | it->continuation_lines_width += it->last_visible_x; | |
14448 | row->ends_in_middle_of_char_p = 1; | |
14449 | row->continued_p = 1; | |
14450 | glyph->pixel_width = it->last_visible_x - x; | |
14451 | it->starts_in_middle_of_char_p = 1; | |
14452 | } | |
5f5c8ee5 | 14453 | else |
5936754e | 14454 | { |
0df56f4d GM |
14455 | /* Something other than a TAB that draws past |
14456 | the right edge of the window. Restore | |
14457 | positions to values before the element. */ | |
5f5c8ee5 | 14458 | row->used[TEXT_AREA] = n_glyphs_before + i; |
2311178e | 14459 | |
5f5c8ee5 GM |
14460 | /* Display continuation glyphs. */ |
14461 | if (!FRAME_WINDOW_P (it->f)) | |
14462 | produce_special_glyphs (it, IT_CONTINUATION); | |
14463 | row->continued_p = 1; | |
653c329b | 14464 | |
0df56f4d | 14465 | it->continuation_lines_width += x; |
2311178e | 14466 | |
91004049 GM |
14467 | if (nglyphs > 1 && i > 0) |
14468 | { | |
14469 | row->ends_in_middle_of_char_p = 1; | |
14470 | it->starts_in_middle_of_char_p = 1; | |
14471 | } | |
2311178e | 14472 | |
e6819faf GM |
14473 | /* Restore the height to what it was before the |
14474 | element not fitting on the line. */ | |
14475 | it->max_ascent = ascent; | |
14476 | it->max_descent = descent; | |
14477 | it->max_phys_ascent = phys_ascent; | |
14478 | it->max_phys_descent = phys_descent; | |
5936754e | 14479 | } |
e6819faf | 14480 | |
5f5c8ee5 GM |
14481 | break; |
14482 | } | |
14483 | else if (new_x > it->first_visible_x) | |
14484 | { | |
14485 | /* Increment number of glyphs actually displayed. */ | |
14486 | ++it->hpos; | |
2311178e | 14487 | |
5f5c8ee5 GM |
14488 | if (x < it->first_visible_x) |
14489 | /* Glyph is partially visible, i.e. row starts at | |
14490 | negative X position. */ | |
14491 | row->x = x - it->first_visible_x; | |
14492 | } | |
14493 | else | |
14494 | { | |
14495 | /* Glyph is completely off the left margin of the | |
14496 | window. This should not happen because of the | |
72b8c434 RS |
14497 | move_it_in_display_line at the start of this |
14498 | function, unless the text display area of the | |
14499 | window is empty. */ | |
14500 | xassert (it->first_visible_x <= it->last_visible_x); | |
a2889657 | 14501 | } |
a2889657 | 14502 | } |
2311178e | 14503 | |
5f5c8ee5 GM |
14504 | row->ascent = max (row->ascent, it->max_ascent); |
14505 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
14506 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
14507 | row->phys_height = max (row->phys_height, | |
14508 | it->max_phys_ascent + it->max_phys_descent); | |
2311178e | 14509 | |
5f5c8ee5 GM |
14510 | /* End of this display line if row is continued. */ |
14511 | if (row->continued_p) | |
14512 | break; | |
a2889657 | 14513 | } |
a2889657 | 14514 | |
5f5c8ee5 GM |
14515 | /* Is this a line end? If yes, we're also done, after making |
14516 | sure that a non-default face is extended up to the right | |
14517 | margin of the window. */ | |
14518 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 14519 | { |
5f5c8ee5 GM |
14520 | int used_before = row->used[TEXT_AREA]; |
14521 | ||
e74fb0f7 GM |
14522 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
14523 | ||
5f5c8ee5 GM |
14524 | /* Add a space at the end of the line that is used to |
14525 | display the cursor there. */ | |
14526 | append_space (it, 0); | |
2311178e | 14527 | |
5f5c8ee5 GM |
14528 | /* Extend the face to the end of the line. */ |
14529 | extend_face_to_end_of_line (it); | |
14530 | ||
14531 | /* Make sure we have the position. */ | |
14532 | if (used_before == 0) | |
14533 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
2311178e | 14534 | |
5f5c8ee5 | 14535 | /* Consume the line end. This skips over invisible lines. */ |
cafafe0b | 14536 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
14537 | it->continuation_lines_width = 0; |
14538 | break; | |
1c9241f5 | 14539 | } |
a2889657 | 14540 | |
2311178e | 14541 | /* Proceed with next display element. Note that this skips |
5f5c8ee5 | 14542 | over lines invisible because of selective display. */ |
cafafe0b | 14543 | set_iterator_to_next (it, 1); |
b1d1124b | 14544 | |
5f5c8ee5 GM |
14545 | /* If we truncate lines, we are done when the last displayed |
14546 | glyphs reach past the right margin of the window. */ | |
14547 | if (it->truncate_lines_p | |
14548 | && (FRAME_WINDOW_P (it->f) | |
14549 | ? (it->current_x >= it->last_visible_x) | |
14550 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 14551 | { |
5f5c8ee5 GM |
14552 | /* Maybe add truncation glyphs. */ |
14553 | if (!FRAME_WINDOW_P (it->f)) | |
14554 | { | |
a98b5ed9 | 14555 | int i, n; |
2311178e | 14556 | |
a98b5ed9 GM |
14557 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
14558 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
14559 | break; | |
14560 | ||
14561 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
14562 | { | |
14563 | row->used[TEXT_AREA] = i; | |
14564 | produce_special_glyphs (it, IT_TRUNCATION); | |
14565 | } | |
5f5c8ee5 | 14566 | } |
2311178e | 14567 | |
5f5c8ee5 GM |
14568 | row->truncated_on_right_p = 1; |
14569 | it->continuation_lines_width = 0; | |
312246d1 | 14570 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
14571 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
14572 | it->hpos = hpos_before; | |
14573 | it->current_x = x_before; | |
14574 | break; | |
75d13c64 | 14575 | } |
a2889657 | 14576 | } |
a2889657 | 14577 | |
5f5c8ee5 GM |
14578 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
14579 | at the left window margin. */ | |
14580 | if (it->first_visible_x | |
14581 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
14582 | { | |
14583 | if (!FRAME_WINDOW_P (it->f)) | |
14584 | insert_left_trunc_glyphs (it); | |
14585 | row->truncated_on_left_p = 1; | |
14586 | } | |
a2889657 | 14587 | |
5f5c8ee5 GM |
14588 | /* If the start of this line is the overlay arrow-position, then |
14589 | mark this glyph row as the one containing the overlay arrow. | |
14590 | This is clearly a mess with variable size fonts. It would be | |
14591 | better to let it be displayed like cursors under X. */ | |
e24c997d | 14592 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 14593 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
14594 | && (MATRIX_ROW_START_CHARPOS (row) |
14595 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 14596 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
14597 | && ! overlay_arrow_seen) |
14598 | { | |
b46952ae | 14599 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
5f5c8ee5 | 14600 | if (!FRAME_WINDOW_P (it->f)) |
c4628384 | 14601 | { |
5f5c8ee5 GM |
14602 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
14603 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
14604 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
14605 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
14606 | struct glyph *p2, *end; | |
14607 | ||
14608 | /* Copy the arrow glyphs. */ | |
14609 | while (glyph < arrow_end) | |
14610 | *p++ = *glyph++; | |
14611 | ||
14612 | /* Throw away padding glyphs. */ | |
14613 | p2 = p; | |
14614 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
14615 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
14616 | ++p2; | |
14617 | if (p2 > p) | |
212e4f87 | 14618 | { |
5f5c8ee5 GM |
14619 | while (p2 < end) |
14620 | *p++ = *p2++; | |
14621 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 14622 | } |
c4628384 | 14623 | } |
2311178e | 14624 | |
a2889657 | 14625 | overlay_arrow_seen = 1; |
5f5c8ee5 | 14626 | row->overlay_arrow_p = 1; |
a2889657 JB |
14627 | } |
14628 | ||
5f5c8ee5 GM |
14629 | /* Compute pixel dimensions of this line. */ |
14630 | compute_line_metrics (it); | |
14631 | ||
14632 | /* Remember the position at which this line ends. */ | |
14633 | row->end = it->current; | |
14634 | ||
173cbca8 | 14635 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
14636 | if (it->w->cursor.vpos < 0 |
14637 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
14638 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
14639 | && cursor_row_p (it->w, row)) | |
14640 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
14641 | |
14642 | /* Highlight trailing whitespace. */ | |
8f897821 | 14643 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
14644 | highlight_trailing_whitespace (it->f, it->glyph_row); |
14645 | ||
14646 | /* Prepare for the next line. This line starts horizontally at (X | |
14647 | HPOS) = (0 0). Vertical positions are incremented. As a | |
14648 | convenience for the caller, IT->glyph_row is set to the next | |
14649 | row to be used. */ | |
14650 | it->current_x = it->hpos = 0; | |
14651 | it->current_y += row->height; | |
14652 | ++it->vpos; | |
14653 | ++it->glyph_row; | |
14654 | return row->displays_text_p; | |
a2889657 | 14655 | } |
5f5c8ee5 GM |
14656 | |
14657 | ||
a2889657 | 14658 | \f |
5f5c8ee5 GM |
14659 | /*********************************************************************** |
14660 | Menu Bar | |
14661 | ***********************************************************************/ | |
14662 | ||
14663 | /* Redisplay the menu bar in the frame for window W. | |
14664 | ||
14665 | The menu bar of X frames that don't have X toolkit support is | |
14666 | displayed in a special window W->frame->menu_bar_window. | |
2311178e | 14667 | |
5f5c8ee5 GM |
14668 | The menu bar of terminal frames is treated specially as far as |
14669 | glyph matrices are concerned. Menu bar lines are not part of | |
14670 | windows, so the update is done directly on the frame matrix rows | |
14671 | for the menu bar. */ | |
7ce2c095 RS |
14672 | |
14673 | static void | |
14674 | display_menu_bar (w) | |
14675 | struct window *w; | |
14676 | { | |
5f5c8ee5 GM |
14677 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
14678 | struct it it; | |
14679 | Lisp_Object items; | |
8351baf2 | 14680 | int i; |
7ce2c095 | 14681 | |
5f5c8ee5 | 14682 | /* Don't do all this for graphical frames. */ |
dc937613 | 14683 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
14684 | if (!NILP (Vwindow_system)) |
14685 | return; | |
dc937613 | 14686 | #endif |
488dd4c4 | 14687 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
d3413a53 | 14688 | if (FRAME_X_P (f)) |
7ce2c095 | 14689 | return; |
5f5c8ee5 | 14690 | #endif |
e0f712ba | 14691 | #ifdef MAC_OS |
1a578e9b AC |
14692 | if (FRAME_MAC_P (f)) |
14693 | return; | |
14694 | #endif | |
5f5c8ee5 GM |
14695 | |
14696 | #ifdef USE_X_TOOLKIT | |
14697 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 14698 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 | 14699 | it.first_visible_x = 0; |
da8b7f4f | 14700 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
5f5c8ee5 GM |
14701 | #else /* not USE_X_TOOLKIT */ |
14702 | if (FRAME_WINDOW_P (f)) | |
14703 | { | |
14704 | /* Menu bar lines are displayed in the desired matrix of the | |
14705 | dummy window menu_bar_window. */ | |
14706 | struct window *menu_w; | |
14707 | xassert (WINDOWP (f->menu_bar_window)); | |
14708 | menu_w = XWINDOW (f->menu_bar_window); | |
14709 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 14710 | MENU_FACE_ID); |
5f5c8ee5 | 14711 | it.first_visible_x = 0; |
da8b7f4f | 14712 | it.last_visible_x = FRAME_TOTAL_COLS (f) * FRAME_COLUMN_WIDTH (f); |
5f5c8ee5 GM |
14713 | } |
14714 | else | |
14715 | { | |
14716 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
14717 | pixel x/y. */ | |
14718 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 14719 | MENU_FACE_ID); |
5f5c8ee5 | 14720 | it.first_visible_x = 0; |
da8b7f4f | 14721 | it.last_visible_x = FRAME_COLS (f); |
5f5c8ee5 GM |
14722 | } |
14723 | #endif /* not USE_X_TOOLKIT */ | |
14724 | ||
1862a24e MB |
14725 | if (! mode_line_inverse_video) |
14726 | /* Force the menu-bar to be displayed in the default face. */ | |
14727 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
14728 | ||
5f5c8ee5 GM |
14729 | /* Clear all rows of the menu bar. */ |
14730 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
14731 | { | |
14732 | struct glyph_row *row = it.glyph_row + i; | |
14733 | clear_glyph_row (row); | |
14734 | row->enabled_p = 1; | |
14735 | row->full_width_p = 1; | |
14736 | } | |
7ce2c095 | 14737 | |
5f5c8ee5 GM |
14738 | /* Display all items of the menu bar. */ |
14739 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 14740 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 14741 | { |
5f5c8ee5 GM |
14742 | Lisp_Object string; |
14743 | ||
14744 | /* Stop at nil string. */ | |
a61b7058 | 14745 | string = AREF (items, i + 1); |
8351baf2 RS |
14746 | if (NILP (string)) |
14747 | break; | |
2d66ad19 | 14748 | |
5f5c8ee5 | 14749 | /* Remember where item was displayed. */ |
a61b7058 | 14750 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 14751 | |
5f5c8ee5 GM |
14752 | /* Display the item, pad with one space. */ |
14753 | if (it.current_x < it.last_visible_x) | |
14754 | display_string (NULL, string, Qnil, 0, 0, &it, | |
2051c264 | 14755 | SCHARS (string) + 1, 0, 0, -1); |
7ce2c095 RS |
14756 | } |
14757 | ||
2d66ad19 | 14758 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
14759 | if (it.current_x < it.last_visible_x) |
14760 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 14761 | |
5f5c8ee5 GM |
14762 | /* Compute the total height of the lines. */ |
14763 | compute_line_metrics (&it); | |
7ce2c095 | 14764 | } |
5f5c8ee5 GM |
14765 | |
14766 | ||
7ce2c095 | 14767 | \f |
5f5c8ee5 GM |
14768 | /*********************************************************************** |
14769 | Mode Line | |
14770 | ***********************************************************************/ | |
14771 | ||
715e84c9 GM |
14772 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
14773 | FORCE is non-zero, redisplay mode lines unconditionally. | |
14774 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
14775 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 14776 | |
715e84c9 GM |
14777 | static int |
14778 | redisplay_mode_lines (window, force) | |
14779 | Lisp_Object window; | |
14780 | int force; | |
14781 | { | |
14782 | int nwindows = 0; | |
2311178e | 14783 | |
715e84c9 GM |
14784 | while (!NILP (window)) |
14785 | { | |
14786 | struct window *w = XWINDOW (window); | |
2311178e | 14787 | |
715e84c9 GM |
14788 | if (WINDOWP (w->hchild)) |
14789 | nwindows += redisplay_mode_lines (w->hchild, force); | |
14790 | else if (WINDOWP (w->vchild)) | |
14791 | nwindows += redisplay_mode_lines (w->vchild, force); | |
14792 | else if (force | |
14793 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
14794 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
14795 | { | |
715e84c9 GM |
14796 | struct text_pos lpoint; |
14797 | struct buffer *old = current_buffer; | |
14798 | ||
14799 | /* Set the window's buffer for the mode line display. */ | |
14800 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
14801 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
2311178e | 14802 | |
715e84c9 GM |
14803 | /* Point refers normally to the selected window. For any |
14804 | other window, set up appropriate value. */ | |
14805 | if (!EQ (window, selected_window)) | |
14806 | { | |
14807 | struct text_pos pt; | |
2311178e | 14808 | |
715e84c9 GM |
14809 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); |
14810 | if (CHARPOS (pt) < BEGV) | |
14811 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
14812 | else if (CHARPOS (pt) > (ZV - 1)) | |
14813 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
14814 | else | |
14815 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
14816 | } | |
14817 | ||
715e84c9 GM |
14818 | /* Display mode lines. */ |
14819 | clear_glyph_matrix (w->desired_matrix); | |
14820 | if (display_mode_lines (w)) | |
14821 | { | |
14822 | ++nwindows; | |
14823 | w->must_be_updated_p = 1; | |
14824 | } | |
14825 | ||
14826 | /* Restore old settings. */ | |
715e84c9 GM |
14827 | set_buffer_internal_1 (old); |
14828 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
14829 | } | |
14830 | ||
14831 | window = w->next; | |
14832 | } | |
14833 | ||
14834 | return nwindows; | |
14835 | } | |
14836 | ||
14837 | ||
14838 | /* Display the mode and/or top line of window W. Value is the number | |
14839 | of mode lines displayed. */ | |
14840 | ||
14841 | static int | |
5f5c8ee5 | 14842 | display_mode_lines (w) |
a2889657 JB |
14843 | struct window *w; |
14844 | { | |
edd1e654 | 14845 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 14846 | int n = 0; |
edd1e654 GM |
14847 | |
14848 | old_selected_frame = selected_frame; | |
14849 | selected_frame = w->frame; | |
14850 | old_selected_window = selected_window; | |
14851 | XSETWINDOW (selected_window, w); | |
2311178e | 14852 | |
5f5c8ee5 | 14853 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 14854 | line_number_displayed = 0; |
155ef550 | 14855 | w->column_number_displayed = Qnil; |
aa6d10fa | 14856 | |
5f5c8ee5 | 14857 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 | 14858 | { |
c96e83bf | 14859 | struct window *sel_w = XWINDOW (old_selected_window); |
f87c0a98 | 14860 | |
96d2320f | 14861 | /* Select mode line face based on the real selected window. */ |
c96e83bf | 14862 | display_mode_line (w, CURRENT_MODE_LINE_FACE_ID_3 (sel_w, sel_w, w), |
715e84c9 GM |
14863 | current_buffer->mode_line_format); |
14864 | ++n; | |
14865 | } | |
2311178e | 14866 | |
045dee35 | 14867 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
14868 | { |
14869 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
14870 | current_buffer->header_line_format); | |
14871 | ++n; | |
14872 | } | |
14873 | ||
edd1e654 GM |
14874 | selected_frame = old_selected_frame; |
14875 | selected_window = old_selected_window; | |
715e84c9 | 14876 | return n; |
5f5c8ee5 | 14877 | } |
03b294dc | 14878 | |
03b294dc | 14879 | |
5f5c8ee5 | 14880 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 14881 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
14882 | FORMAT is the mode line format to display. Value is the pixel |
14883 | height of the mode line displayed. */ | |
03b294dc | 14884 | |
04612a64 | 14885 | static int |
5f5c8ee5 GM |
14886 | display_mode_line (w, face_id, format) |
14887 | struct window *w; | |
14888 | enum face_id face_id; | |
14889 | Lisp_Object format; | |
14890 | { | |
14891 | struct it it; | |
14892 | struct face *face; | |
03b294dc | 14893 | |
5f5c8ee5 GM |
14894 | init_iterator (&it, w, -1, -1, NULL, face_id); |
14895 | prepare_desired_row (it.glyph_row); | |
14896 | ||
1862a24e MB |
14897 | if (! mode_line_inverse_video) |
14898 | /* Force the mode-line to be displayed in the default face. */ | |
14899 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
14900 | ||
5f5c8ee5 GM |
14901 | /* Temporarily make frame's keyboard the current kboard so that |
14902 | kboard-local variables in the mode_line_format will get the right | |
14903 | values. */ | |
14904 | push_frame_kboard (it.f); | |
c53a1624 | 14905 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); |
5f5c8ee5 | 14906 | pop_frame_kboard (); |
a2889657 | 14907 | |
5f5c8ee5 GM |
14908 | /* Fill up with spaces. */ |
14909 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
2311178e | 14910 | |
5f5c8ee5 GM |
14911 | compute_line_metrics (&it); |
14912 | it.glyph_row->full_width_p = 1; | |
14913 | it.glyph_row->mode_line_p = 1; | |
5f5c8ee5 GM |
14914 | it.glyph_row->continued_p = 0; |
14915 | it.glyph_row->truncated_on_left_p = 0; | |
14916 | it.glyph_row->truncated_on_right_p = 0; | |
14917 | ||
14918 | /* Make a 3D mode-line have a shadow at its right end. */ | |
14919 | face = FACE_FROM_ID (it.f, face_id); | |
14920 | extend_face_to_end_of_line (&it); | |
14921 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 14922 | { |
5f5c8ee5 GM |
14923 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
14924 | + it.glyph_row->used[TEXT_AREA] - 1); | |
14925 | last->right_box_line_p = 1; | |
d7eb09a0 | 14926 | } |
04612a64 GM |
14927 | |
14928 | return it.glyph_row->height; | |
a2889657 JB |
14929 | } |
14930 | ||
0fcf414f RS |
14931 | /* Alist that caches the results of :propertize. |
14932 | Each element is (PROPERTIZED-STRING . PROPERTY-LIST). */ | |
14933 | Lisp_Object mode_line_proptrans_alist; | |
a2889657 | 14934 | |
fec8f23e KS |
14935 | /* List of strings making up the mode-line. */ |
14936 | Lisp_Object mode_line_string_list; | |
14937 | ||
14938 | /* Base face property when building propertized mode line string. */ | |
14939 | static Lisp_Object mode_line_string_face; | |
14940 | static Lisp_Object mode_line_string_face_prop; | |
14941 | ||
14942 | ||
5f5c8ee5 GM |
14943 | /* Contribute ELT to the mode line for window IT->w. How it |
14944 | translates into text depends on its data type. | |
a2889657 | 14945 | |
5f5c8ee5 | 14946 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
14947 | |
14948 | DEPTH is the depth in recursion. It is used to prevent | |
14949 | infinite recursion here. | |
14950 | ||
5f5c8ee5 GM |
14951 | FIELD_WIDTH is the number of characters the display of ELT should |
14952 | occupy in the mode line, and PRECISION is the maximum number of | |
14953 | characters to display from ELT's representation. See | |
b8523839 | 14954 | display_string for details. |
a2889657 | 14955 | |
c53a1624 RS |
14956 | Returns the hpos of the end of the text generated by ELT. |
14957 | ||
14958 | PROPS is a property list to add to any string we encounter. | |
14959 | ||
7d0393cf | 14960 | If RISKY is nonzero, remove (disregard) any properties in any string |
93da8435 SM |
14961 | we encounter, and ignore :eval and :propertize. |
14962 | ||
14963 | If the global variable `frame_title_ptr' is non-NULL, then the output | |
14964 | is passed to `store_frame_title' instead of `display_string'. */ | |
a2889657 JB |
14965 | |
14966 | static int | |
c53a1624 | 14967 | display_mode_element (it, depth, field_width, precision, elt, props, risky) |
5f5c8ee5 | 14968 | struct it *it; |
a2889657 | 14969 | int depth; |
5f5c8ee5 | 14970 | int field_width, precision; |
0fcf414f | 14971 | Lisp_Object elt, props; |
c53a1624 | 14972 | int risky; |
a2889657 | 14973 | { |
5f5c8ee5 | 14974 | int n = 0, field, prec; |
0fcf414f | 14975 | int literal = 0; |
5f5c8ee5 | 14976 | |
a2889657 | 14977 | tail_recurse: |
1a89be1e SM |
14978 | if (depth > 100) |
14979 | elt = build_string ("*too-deep*"); | |
a2889657 JB |
14980 | |
14981 | depth++; | |
14982 | ||
0220c518 | 14983 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
14984 | { |
14985 | case Lisp_String: | |
14986 | { | |
14987 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 | 14988 | unsigned char c; |
50f80c2f | 14989 | const unsigned char *this, *lisp_string; |
5f5c8ee5 | 14990 | |
c53a1624 | 14991 | if (!NILP (props) || risky) |
0fcf414f RS |
14992 | { |
14993 | Lisp_Object oprops, aelt; | |
14994 | oprops = Ftext_properties_at (make_number (0), elt); | |
c53a1624 RS |
14995 | |
14996 | if (NILP (Fequal (props, oprops)) || risky) | |
0fcf414f | 14997 | { |
ae02e06a RS |
14998 | /* If the starting string has properties, |
14999 | merge the specified ones onto the existing ones. */ | |
c53a1624 | 15000 | if (! NILP (oprops) && !risky) |
ae02e06a RS |
15001 | { |
15002 | Lisp_Object tem; | |
15003 | ||
15004 | oprops = Fcopy_sequence (oprops); | |
15005 | tem = props; | |
15006 | while (CONSP (tem)) | |
15007 | { | |
15008 | oprops = Fplist_put (oprops, XCAR (tem), | |
15009 | XCAR (XCDR (tem))); | |
15010 | tem = XCDR (XCDR (tem)); | |
15011 | } | |
15012 | props = oprops; | |
15013 | } | |
15014 | ||
0fcf414f RS |
15015 | aelt = Fassoc (elt, mode_line_proptrans_alist); |
15016 | if (! NILP (aelt) && !NILP (Fequal (props, XCDR (aelt)))) | |
adb63af1 RS |
15017 | { |
15018 | mode_line_proptrans_alist | |
15019 | = Fcons (aelt, Fdelq (aelt, mode_line_proptrans_alist)); | |
15020 | elt = XCAR (aelt); | |
15021 | } | |
0fcf414f RS |
15022 | else |
15023 | { | |
adb63af1 RS |
15024 | Lisp_Object tem; |
15025 | ||
0fcf414f | 15026 | elt = Fcopy_sequence (elt); |
dc3b2c8b SM |
15027 | Fset_text_properties (make_number (0), Flength (elt), |
15028 | props, elt); | |
adb63af1 | 15029 | /* Add this item to mode_line_proptrans_alist. */ |
0fcf414f RS |
15030 | mode_line_proptrans_alist |
15031 | = Fcons (Fcons (elt, props), | |
15032 | mode_line_proptrans_alist); | |
adb63af1 RS |
15033 | /* Truncate mode_line_proptrans_alist |
15034 | to at most 50 elements. */ | |
15035 | tem = Fnthcdr (make_number (50), | |
15036 | mode_line_proptrans_alist); | |
15037 | if (! NILP (tem)) | |
15038 | XSETCDR (tem, Qnil); | |
0fcf414f RS |
15039 | } |
15040 | } | |
15041 | } | |
15042 | ||
2051c264 | 15043 | this = SDATA (elt); |
ae02e06a RS |
15044 | lisp_string = this; |
15045 | ||
0fcf414f RS |
15046 | if (literal) |
15047 | { | |
15048 | prec = precision - n; | |
15049 | if (frame_title_ptr) | |
2051c264 | 15050 | n += store_frame_title (SDATA (elt), -1, prec); |
fec8f23e KS |
15051 | else if (!NILP (mode_line_string_list)) |
15052 | n += store_mode_line_string (NULL, elt, 1, 0, prec, Qnil); | |
0fcf414f RS |
15053 | else |
15054 | n += display_string (NULL, elt, Qnil, 0, 0, it, | |
15055 | 0, prec, 0, STRING_MULTIBYTE (elt)); | |
15056 | ||
15057 | break; | |
15058 | } | |
15059 | ||
5f5c8ee5 GM |
15060 | while ((precision <= 0 || n < precision) |
15061 | && *this | |
15062 | && (frame_title_ptr | |
fec8f23e | 15063 | || !NILP (mode_line_string_list) |
5f5c8ee5 | 15064 | || it->current_x < it->last_visible_x)) |
a2889657 | 15065 | { |
50f80c2f | 15066 | const unsigned char *last = this; |
5f5c8ee5 GM |
15067 | |
15068 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
15069 | while ((c = *this++) != '\0' && c != '%') |
15070 | ; | |
2311178e | 15071 | |
a2889657 JB |
15072 | if (this - 1 != last) |
15073 | { | |
5f5c8ee5 GM |
15074 | /* Output to end of string or up to '%'. Field width |
15075 | is length of string. Don't output more than | |
15076 | PRECISION allows us. */ | |
d26b89b8 | 15077 | --this; |
eaaa65b0 GM |
15078 | |
15079 | prec = chars_in_text (last, this - last); | |
5f5c8ee5 GM |
15080 | if (precision > 0 && prec > precision - n) |
15081 | prec = precision - n; | |
2311178e | 15082 | |
d39b6696 | 15083 | if (frame_title_ptr) |
d26b89b8 | 15084 | n += store_frame_title (last, 0, prec); |
fec8f23e KS |
15085 | else if (!NILP (mode_line_string_list)) |
15086 | { | |
15087 | int bytepos = last - lisp_string; | |
15088 | int charpos = string_byte_to_char (elt, bytepos); | |
15089 | n += store_mode_line_string (NULL, | |
15090 | Fsubstring (elt, make_number (charpos), | |
15091 | make_number (charpos + prec)), | |
15092 | 0, 0, 0, Qnil); | |
15093 | } | |
d39b6696 | 15094 | else |
eaaa65b0 GM |
15095 | { |
15096 | int bytepos = last - lisp_string; | |
15097 | int charpos = string_byte_to_char (elt, bytepos); | |
15098 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
ca77144d GM |
15099 | it, 0, prec, 0, |
15100 | STRING_MULTIBYTE (elt)); | |
eaaa65b0 | 15101 | } |
a2889657 JB |
15102 | } |
15103 | else /* c == '%' */ | |
15104 | { | |
50f80c2f | 15105 | const unsigned char *percent_position = this; |
2311178e | 15106 | |
5f5c8ee5 GM |
15107 | /* Get the specified minimum width. Zero means |
15108 | don't pad. */ | |
15109 | field = 0; | |
a2889657 | 15110 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 15111 | field = field * 10 + c - '0'; |
a2889657 | 15112 | |
5f5c8ee5 GM |
15113 | /* Don't pad beyond the total padding allowed. */ |
15114 | if (field_width - n > 0 && field > field_width - n) | |
15115 | field = field_width - n; | |
a2889657 | 15116 | |
5f5c8ee5 GM |
15117 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
15118 | prec = precision - n; | |
2311178e | 15119 | |
a2889657 | 15120 | if (c == 'M') |
5f5c8ee5 | 15121 | n += display_mode_element (it, depth, field, prec, |
c53a1624 RS |
15122 | Vglobal_mode_string, props, |
15123 | risky); | |
a2889657 | 15124 | else if (c != 0) |
d39b6696 | 15125 | { |
72f62cb5 | 15126 | int multibyte; |
ae02e06a RS |
15127 | int bytepos, charpos; |
15128 | unsigned char *spec; | |
2311178e | 15129 | |
ae02e06a RS |
15130 | bytepos = percent_position - lisp_string; |
15131 | charpos = (STRING_MULTIBYTE (elt) | |
15132 | ? string_byte_to_char (elt, bytepos) | |
15133 | : bytepos); | |
15134 | ||
15135 | spec | |
72f62cb5 GM |
15136 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
15137 | ||
d39b6696 | 15138 | if (frame_title_ptr) |
5f5c8ee5 | 15139 | n += store_frame_title (spec, field, prec); |
fec8f23e KS |
15140 | else if (!NILP (mode_line_string_list)) |
15141 | { | |
15142 | int len = strlen (spec); | |
15143 | Lisp_Object tem = make_string (spec, len); | |
15144 | props = Ftext_properties_at (make_number (charpos), elt); | |
15145 | /* Should only keep face property in props */ | |
15146 | n += store_mode_line_string (NULL, tem, 0, field, prec, props); | |
15147 | } | |
d39b6696 | 15148 | else |
5f5c8ee5 | 15149 | { |
ae02e06a | 15150 | int nglyphs_before, nwritten; |
2311178e | 15151 | |
72f62cb5 | 15152 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; |
72f62cb5 GM |
15153 | nwritten = display_string (spec, Qnil, elt, |
15154 | charpos, 0, it, | |
15155 | field, prec, 0, | |
15156 | multibyte); | |
5f5c8ee5 GM |
15157 | |
15158 | /* Assign to the glyphs written above the | |
15159 | string where the `%x' came from, position | |
15160 | of the `%'. */ | |
15161 | if (nwritten > 0) | |
15162 | { | |
15163 | struct glyph *glyph | |
15164 | = (it->glyph_row->glyphs[TEXT_AREA] | |
15165 | + nglyphs_before); | |
15166 | int i; | |
15167 | ||
15168 | for (i = 0; i < nwritten; ++i) | |
15169 | { | |
15170 | glyph[i].object = elt; | |
15171 | glyph[i].charpos = charpos; | |
15172 | } | |
2311178e | 15173 | |
5f5c8ee5 GM |
15174 | n += nwritten; |
15175 | } | |
15176 | } | |
d39b6696 | 15177 | } |
b8523839 AS |
15178 | else /* c == 0 */ |
15179 | break; | |
a2889657 JB |
15180 | } |
15181 | } | |
15182 | } | |
15183 | break; | |
15184 | ||
15185 | case Lisp_Symbol: | |
15186 | /* A symbol: process the value of the symbol recursively | |
15187 | as if it appeared here directly. Avoid error if symbol void. | |
15188 | Special case: if value of symbol is a string, output the string | |
15189 | literally. */ | |
15190 | { | |
15191 | register Lisp_Object tem; | |
c53a1624 RS |
15192 | |
15193 | /* If the variable is not marked as risky to set | |
15194 | then its contents are risky to use. */ | |
15195 | if (NILP (Fget (elt, Qrisky_local_variable))) | |
15196 | risky = 1; | |
15197 | ||
a2889657 | 15198 | tem = Fboundp (elt); |
265a9e55 | 15199 | if (!NILP (tem)) |
a2889657 JB |
15200 | { |
15201 | tem = Fsymbol_value (elt); | |
15202 | /* If value is a string, output that string literally: | |
15203 | don't check for % within it. */ | |
e24c997d | 15204 | if (STRINGP (tem)) |
0fcf414f RS |
15205 | literal = 1; |
15206 | ||
15207 | if (!EQ (tem, elt)) | |
5f5c8ee5 GM |
15208 | { |
15209 | /* Give up right away for nil or t. */ | |
15210 | elt = tem; | |
15211 | goto tail_recurse; | |
15212 | } | |
a2889657 JB |
15213 | } |
15214 | } | |
15215 | break; | |
15216 | ||
15217 | case Lisp_Cons: | |
15218 | { | |
15219 | register Lisp_Object car, tem; | |
15220 | ||
0fcf414f RS |
15221 | /* A cons cell: five distinct cases. |
15222 | If first element is :eval or :propertize, do something special. | |
a2889657 JB |
15223 | If first element is a string or a cons, process all the elements |
15224 | and effectively concatenate them. | |
15225 | If first element is a negative number, truncate displaying cdr to | |
15226 | at most that many characters. If positive, pad (with spaces) | |
15227 | to at least that many characters. | |
15228 | If first element is a symbol, process the cadr or caddr recursively | |
15229 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 15230 | car = XCAR (elt); |
0fcf414f | 15231 | if (EQ (car, QCeval)) |
5f5c8ee5 GM |
15232 | { |
15233 | /* An element of the form (:eval FORM) means evaluate FORM | |
15234 | and use the result as mode line elements. */ | |
0fcf414f | 15235 | |
c53a1624 RS |
15236 | if (risky) |
15237 | break; | |
15238 | ||
0fcf414f RS |
15239 | if (CONSP (XCDR (elt))) |
15240 | { | |
15241 | Lisp_Object spec; | |
15242 | spec = safe_eval (XCAR (XCDR (elt))); | |
15243 | n += display_mode_element (it, depth, field_width - n, | |
c53a1624 RS |
15244 | precision - n, spec, props, |
15245 | risky); | |
0fcf414f RS |
15246 | } |
15247 | } | |
15248 | else if (EQ (car, QCpropertize)) | |
15249 | { | |
c53a1624 RS |
15250 | /* An element of the form (:propertize ELT PROPS...) |
15251 | means display ELT but applying properties PROPS. */ | |
15252 | ||
15253 | if (risky) | |
15254 | break; | |
15255 | ||
0fcf414f | 15256 | if (CONSP (XCDR (elt))) |
c53a1624 RS |
15257 | n += display_mode_element (it, depth, field_width - n, |
15258 | precision - n, XCAR (XCDR (elt)), | |
15259 | XCDR (XCDR (elt)), risky); | |
5f5c8ee5 GM |
15260 | } |
15261 | else if (SYMBOLP (car)) | |
a2889657 JB |
15262 | { |
15263 | tem = Fboundp (car); | |
9472f927 | 15264 | elt = XCDR (elt); |
e24c997d | 15265 | if (!CONSP (elt)) |
a2889657 JB |
15266 | goto invalid; |
15267 | /* elt is now the cdr, and we know it is a cons cell. | |
15268 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 15269 | if (!NILP (tem)) |
a2889657 JB |
15270 | { |
15271 | tem = Fsymbol_value (car); | |
265a9e55 | 15272 | if (!NILP (tem)) |
9472f927 GM |
15273 | { |
15274 | elt = XCAR (elt); | |
15275 | goto tail_recurse; | |
15276 | } | |
a2889657 JB |
15277 | } |
15278 | /* Symbol's value is nil (or symbol is unbound) | |
15279 | Get the cddr of the original list | |
15280 | and if possible find the caddr and use that. */ | |
9472f927 | 15281 | elt = XCDR (elt); |
265a9e55 | 15282 | if (NILP (elt)) |
a2889657 | 15283 | break; |
e24c997d | 15284 | else if (!CONSP (elt)) |
a2889657 | 15285 | goto invalid; |
9472f927 | 15286 | elt = XCAR (elt); |
a2889657 JB |
15287 | goto tail_recurse; |
15288 | } | |
e24c997d | 15289 | else if (INTEGERP (car)) |
a2889657 JB |
15290 | { |
15291 | register int lim = XINT (car); | |
9472f927 | 15292 | elt = XCDR (elt); |
a2889657 | 15293 | if (lim < 0) |
5f5c8ee5 GM |
15294 | { |
15295 | /* Negative int means reduce maximum width. */ | |
15296 | if (precision <= 0) | |
15297 | precision = -lim; | |
15298 | else | |
15299 | precision = min (precision, -lim); | |
15300 | } | |
a2889657 JB |
15301 | else if (lim > 0) |
15302 | { | |
15303 | /* Padding specified. Don't let it be more than | |
15304 | current maximum. */ | |
5f5c8ee5 GM |
15305 | if (precision > 0) |
15306 | lim = min (precision, lim); | |
15307 | ||
a2889657 JB |
15308 | /* If that's more padding than already wanted, queue it. |
15309 | But don't reduce padding already specified even if | |
15310 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 15311 | field_width = max (lim, field_width); |
a2889657 JB |
15312 | } |
15313 | goto tail_recurse; | |
15314 | } | |
e24c997d | 15315 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
15316 | { |
15317 | register int limit = 50; | |
5f5c8ee5 GM |
15318 | /* Limit is to protect against circular lists. */ |
15319 | while (CONSP (elt) | |
15320 | && --limit > 0 | |
15321 | && (precision <= 0 || n < precision)) | |
a2889657 | 15322 | { |
5f5c8ee5 | 15323 | n += display_mode_element (it, depth, field_width - n, |
c53a1624 RS |
15324 | precision - n, XCAR (elt), |
15325 | props, risky); | |
9472f927 | 15326 | elt = XCDR (elt); |
a2889657 JB |
15327 | } |
15328 | } | |
15329 | } | |
15330 | break; | |
15331 | ||
15332 | default: | |
15333 | invalid: | |
1a89be1e SM |
15334 | elt = build_string ("*invalid*"); |
15335 | goto tail_recurse; | |
a2889657 JB |
15336 | } |
15337 | ||
5f5c8ee5 GM |
15338 | /* Pad to FIELD_WIDTH. */ |
15339 | if (field_width > 0 && n < field_width) | |
15340 | { | |
15341 | if (frame_title_ptr) | |
15342 | n += store_frame_title ("", field_width - n, 0); | |
fec8f23e KS |
15343 | else if (!NILP (mode_line_string_list)) |
15344 | n += store_mode_line_string ("", Qnil, 0, field_width - n, 0, Qnil); | |
5f5c8ee5 GM |
15345 | else |
15346 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
15347 | 0, 0, 0); | |
15348 | } | |
2311178e | 15349 | |
5f5c8ee5 | 15350 | return n; |
a2889657 | 15351 | } |
5f5c8ee5 | 15352 | |
fec8f23e KS |
15353 | /* Store a mode-line string element in mode_line_string_list. |
15354 | ||
15355 | If STRING is non-null, display that C string. Otherwise, the Lisp | |
15356 | string LISP_STRING is displayed. | |
15357 | ||
15358 | FIELD_WIDTH is the minimum number of output glyphs to produce. | |
15359 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
15360 | with spaces. FIELD_WIDTH <= 0 means don't pad. | |
15361 | ||
15362 | PRECISION is the maximum number of characters to output from | |
15363 | STRING. PRECISION <= 0 means don't truncate the string. | |
15364 | ||
15365 | If COPY_STRING is non-zero, make a copy of LISP_STRING before adding | |
15366 | properties to the string. | |
15367 | ||
7d0393cf | 15368 | PROPS are the properties to add to the string. |
fec8f23e KS |
15369 | The mode_line_string_face face property is always added to the string. |
15370 | */ | |
15371 | ||
15372 | static int store_mode_line_string (string, lisp_string, copy_string, field_width, precision, props) | |
15373 | char *string; | |
15374 | Lisp_Object lisp_string; | |
15375 | int copy_string; | |
15376 | int field_width; | |
15377 | int precision; | |
15378 | Lisp_Object props; | |
15379 | { | |
15380 | int len; | |
15381 | int n = 0; | |
15382 | ||
15383 | if (string != NULL) | |
15384 | { | |
15385 | len = strlen (string); | |
15386 | if (precision > 0 && len > precision) | |
15387 | len = precision; | |
15388 | lisp_string = make_string (string, len); | |
15389 | if (NILP (props)) | |
15390 | props = mode_line_string_face_prop; | |
15391 | else if (!NILP (mode_line_string_face)) | |
15392 | { | |
15393 | Lisp_Object face = Fplist_get (props, Qface); | |
15394 | props = Fcopy_sequence (props); | |
15395 | if (NILP (face)) | |
15396 | face = mode_line_string_face; | |
15397 | else | |
15398 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
15399 | props = Fplist_put (props, Qface, face); | |
15400 | } | |
15401 | Fadd_text_properties (make_number (0), make_number (len), | |
15402 | props, lisp_string); | |
15403 | } | |
7d0393cf | 15404 | else |
fec8f23e | 15405 | { |
c8224325 | 15406 | len = XFASTINT (Flength (lisp_string)); |
fec8f23e KS |
15407 | if (precision > 0 && len > precision) |
15408 | { | |
15409 | len = precision; | |
15410 | lisp_string = Fsubstring (lisp_string, make_number (0), make_number (len)); | |
15411 | precision = -1; | |
15412 | } | |
15413 | if (!NILP (mode_line_string_face)) | |
15414 | { | |
15415 | Lisp_Object face; | |
15416 | if (NILP (props)) | |
15417 | props = Ftext_properties_at (make_number (0), lisp_string); | |
15418 | face = Fplist_get (props, Qface); | |
15419 | if (NILP (face)) | |
15420 | face = mode_line_string_face; | |
15421 | else | |
15422 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
15423 | props = Fcons (Qface, Fcons (face, Qnil)); | |
15424 | if (copy_string) | |
15425 | lisp_string = Fcopy_sequence (lisp_string); | |
15426 | } | |
15427 | if (!NILP (props)) | |
15428 | Fadd_text_properties (make_number (0), make_number (len), | |
15429 | props, lisp_string); | |
15430 | } | |
15431 | ||
15432 | if (len > 0) | |
15433 | { | |
15434 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 15435 | n += len; |
fec8f23e KS |
15436 | } |
15437 | ||
15438 | if (field_width > len) | |
15439 | { | |
15440 | field_width -= len; | |
15441 | lisp_string = Fmake_string (make_number (field_width), make_number (' ')); | |
15442 | if (!NILP (props)) | |
15443 | Fadd_text_properties (make_number (0), make_number (field_width), | |
15444 | props, lisp_string); | |
15445 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 15446 | n += field_width; |
fec8f23e KS |
15447 | } |
15448 | ||
15449 | return n; | |
15450 | } | |
15451 | ||
5f5c8ee5 | 15452 | |
8143e6ab | 15453 | DEFUN ("format-mode-line", Fformat_mode_line, Sformat_mode_line, |
fec8f23e | 15454 | 0, 3, 0, |
8143e6ab KS |
15455 | doc: /* Return the mode-line of selected window as a string. |
15456 | First optional arg FORMAT specifies a different format string (see | |
8b22c65a | 15457 | `mode-line-format' for details) to use. If FORMAT is t, return |
8143e6ab | 15458 | the buffer's header-line. Second optional arg WINDOW specifies a |
fec8f23e KS |
15459 | different window to use as the context for the formatting. |
15460 | If third optional arg NO-PROPS is non-nil, string is not propertized. */) | |
15461 | (format, window, no_props) | |
15462 | Lisp_Object format, window, no_props; | |
8143e6ab KS |
15463 | { |
15464 | struct it it; | |
8143e6ab KS |
15465 | int len; |
15466 | struct window *w; | |
15467 | struct buffer *old_buffer = NULL; | |
fec8f23e | 15468 | enum face_id face_id = DEFAULT_FACE_ID; |
8143e6ab KS |
15469 | |
15470 | if (NILP (window)) | |
15471 | window = selected_window; | |
15472 | CHECK_WINDOW (window); | |
15473 | w = XWINDOW (window); | |
15474 | CHECK_BUFFER (w->buffer); | |
15475 | ||
15476 | if (XBUFFER (w->buffer) != current_buffer) | |
15477 | { | |
15478 | old_buffer = current_buffer; | |
15479 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
15480 | } | |
15481 | ||
15482 | if (NILP (format) || EQ (format, Qt)) | |
fec8f23e KS |
15483 | { |
15484 | face_id = NILP (format) | |
15485 | ? CURRENT_MODE_LINE_FACE_ID (w) : | |
15486 | HEADER_LINE_FACE_ID; | |
15487 | format = NILP (format) | |
15488 | ? current_buffer->mode_line_format | |
15489 | : current_buffer->header_line_format; | |
15490 | } | |
15491 | ||
15492 | init_iterator (&it, w, -1, -1, NULL, face_id); | |
8143e6ab | 15493 | |
fec8f23e KS |
15494 | if (NILP (no_props)) |
15495 | { | |
15496 | mode_line_string_face = | |
15497 | (face_id == MODE_LINE_FACE_ID ? Qmode_line : | |
15498 | face_id == MODE_LINE_INACTIVE_FACE_ID ? Qmode_line_inactive : | |
15499 | face_id == HEADER_LINE_FACE_ID ? Qheader_line : Qnil); | |
8143e6ab | 15500 | |
fec8f23e KS |
15501 | mode_line_string_face_prop = |
15502 | NILP (mode_line_string_face) ? Qnil : | |
15503 | Fcons (Qface, Fcons (mode_line_string_face, Qnil)); | |
15504 | ||
15505 | /* We need a dummy last element in mode_line_string_list to | |
15506 | indicate we are building the propertized mode-line string. | |
15507 | Using mode_line_string_face_prop here GC protects it. */ | |
7d0393cf | 15508 | mode_line_string_list = |
fec8f23e KS |
15509 | Fcons (mode_line_string_face_prop, Qnil); |
15510 | frame_title_ptr = NULL; | |
15511 | } | |
15512 | else | |
15513 | { | |
15514 | mode_line_string_face_prop = Qnil; | |
15515 | mode_line_string_list = Qnil; | |
15516 | frame_title_ptr = frame_title_buf; | |
15517 | } | |
8143e6ab KS |
15518 | |
15519 | push_frame_kboard (it.f); | |
15520 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); | |
15521 | pop_frame_kboard (); | |
15522 | ||
15523 | if (old_buffer) | |
15524 | set_buffer_internal_1 (old_buffer); | |
15525 | ||
fec8f23e KS |
15526 | if (NILP (no_props)) |
15527 | { | |
15528 | Lisp_Object str; | |
15529 | mode_line_string_list = Fnreverse (mode_line_string_list); | |
15530 | str = Fmapconcat (intern ("identity"), XCDR (mode_line_string_list), | |
15531 | make_string ("", 0)); | |
15532 | mode_line_string_face_prop = Qnil; | |
15533 | mode_line_string_list = Qnil; | |
15534 | return str; | |
15535 | } | |
15536 | ||
8143e6ab KS |
15537 | len = frame_title_ptr - frame_title_buf; |
15538 | if (len > 0 && frame_title_ptr[-1] == '-') | |
15539 | { | |
15540 | /* Mode lines typically ends with numerous dashes; reduce to two dashes. */ | |
15541 | while (frame_title_ptr > frame_title_buf && *--frame_title_ptr == '-') | |
15542 | ; | |
15543 | frame_title_ptr += 3; /* restore last non-dash + two dashes */ | |
15544 | if (len > frame_title_ptr - frame_title_buf) | |
15545 | len = frame_title_ptr - frame_title_buf; | |
15546 | } | |
15547 | ||
15548 | frame_title_ptr = NULL; | |
15549 | return make_string (frame_title_buf, len); | |
15550 | } | |
15551 | ||
766525bc RS |
15552 | /* Write a null-terminated, right justified decimal representation of |
15553 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
15554 | ||
15555 | static void | |
15556 | pint2str (buf, width, d) | |
15557 | register char *buf; | |
15558 | register int width; | |
15559 | register int d; | |
15560 | { | |
15561 | register char *p = buf; | |
2311178e | 15562 | |
766525bc | 15563 | if (d <= 0) |
5f5c8ee5 | 15564 | *p++ = '0'; |
766525bc | 15565 | else |
5f5c8ee5 | 15566 | { |
766525bc | 15567 | while (d > 0) |
5f5c8ee5 | 15568 | { |
766525bc RS |
15569 | *p++ = d % 10 + '0'; |
15570 | d /= 10; | |
5f5c8ee5 GM |
15571 | } |
15572 | } | |
2311178e | 15573 | |
5f5c8ee5 GM |
15574 | for (width -= (int) (p - buf); width > 0; --width) |
15575 | *p++ = ' '; | |
766525bc RS |
15576 | *p-- = '\0'; |
15577 | while (p > buf) | |
5f5c8ee5 | 15578 | { |
766525bc RS |
15579 | d = *buf; |
15580 | *buf++ = *p; | |
15581 | *p-- = d; | |
5f5c8ee5 | 15582 | } |
766525bc RS |
15583 | } |
15584 | ||
5f5c8ee5 | 15585 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
15586 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
15587 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
15588 | ||
6693a99a | 15589 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 15590 | |
1c9241f5 KH |
15591 | static char * |
15592 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
15593 | Lisp_Object coding_system; | |
15594 | register char *buf; | |
15595 | int eol_flag; | |
15596 | { | |
1e1078d6 | 15597 | Lisp_Object val; |
916848d8 | 15598 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
50f80c2f | 15599 | const unsigned char *eol_str; |
302f2b38 EZ |
15600 | int eol_str_len; |
15601 | /* The EOL conversion we are using. */ | |
15602 | Lisp_Object eoltype; | |
1e1078d6 | 15603 | |
4a09dee0 | 15604 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 15605 | eoltype = Qnil; |
1c9241f5 | 15606 | |
4a09dee0 | 15607 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 15608 | { |
916848d8 RS |
15609 | if (multibyte) |
15610 | *buf++ = '-'; | |
21e989e3 | 15611 | if (eol_flag) |
302f2b38 | 15612 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 15613 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
15614 | } |
15615 | else | |
15616 | { | |
1e1078d6 RS |
15617 | Lisp_Object eolvalue; |
15618 | ||
15619 | eolvalue = Fget (coding_system, Qeol_type); | |
15620 | ||
916848d8 | 15621 | if (multibyte) |
a61b7058 | 15622 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 15623 | |
1c9241f5 KH |
15624 | if (eol_flag) |
15625 | { | |
1e1078d6 RS |
15626 | /* The EOL conversion that is normal on this system. */ |
15627 | ||
15628 | if (NILP (eolvalue)) /* Not yet decided. */ | |
15629 | eoltype = eol_mnemonic_undecided; | |
15630 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
15631 | eoltype = eol_mnemonic_undecided; | |
15632 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
15633 | eoltype = (XFASTINT (eolvalue) == 0 | |
15634 | ? eol_mnemonic_unix | |
15635 | : (XFASTINT (eolvalue) == 1 | |
15636 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
15637 | } |
15638 | } | |
2311178e | 15639 | |
302f2b38 EZ |
15640 | if (eol_flag) |
15641 | { | |
15642 | /* Mention the EOL conversion if it is not the usual one. */ | |
15643 | if (STRINGP (eoltype)) | |
15644 | { | |
2051c264 GM |
15645 | eol_str = SDATA (eoltype); |
15646 | eol_str_len = SBYTES (eoltype); | |
302f2b38 | 15647 | } |
f30b3499 KH |
15648 | else if (INTEGERP (eoltype) |
15649 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
15650 | { | |
50f80c2f KR |
15651 | unsigned char *tmp = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
15652 | eol_str_len = CHAR_STRING (XINT (eoltype), tmp); | |
15653 | eol_str = tmp; | |
f30b3499 | 15654 | } |
302f2b38 EZ |
15655 | else |
15656 | { | |
15657 | eol_str = invalid_eol_type; | |
15658 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 15659 | } |
f30b3499 | 15660 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 15661 | buf += eol_str_len; |
1c9241f5 | 15662 | } |
302f2b38 | 15663 | |
1c9241f5 KH |
15664 | return buf; |
15665 | } | |
15666 | ||
a2889657 | 15667 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
15668 | generated by character C. PRECISION >= 0 means don't return a |
15669 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 GM |
15670 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
15671 | if the result is multibyte text. */ | |
a2889657 | 15672 | |
11e82b76 JB |
15673 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
15674 | ||
a2889657 | 15675 | static char * |
72f62cb5 | 15676 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 15677 | struct window *w; |
68c45bf0 | 15678 | register int c; |
5f5c8ee5 | 15679 | int field_width, precision; |
72f62cb5 | 15680 | int *multibyte; |
a2889657 | 15681 | { |
0b67772d | 15682 | Lisp_Object obj; |
5f5c8ee5 GM |
15683 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
15684 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 15685 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 15686 | |
0b67772d | 15687 | obj = Qnil; |
72f62cb5 | 15688 | *multibyte = 0; |
a2889657 JB |
15689 | |
15690 | switch (c) | |
15691 | { | |
1af9f229 RS |
15692 | case '*': |
15693 | if (!NILP (b->read_only)) | |
15694 | return "%"; | |
15695 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
15696 | return "*"; | |
15697 | return "-"; | |
15698 | ||
15699 | case '+': | |
15700 | /* This differs from %* only for a modified read-only buffer. */ | |
15701 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
15702 | return "*"; | |
15703 | if (!NILP (b->read_only)) | |
15704 | return "%"; | |
15705 | return "-"; | |
15706 | ||
15707 | case '&': | |
15708 | /* This differs from %* in ignoring read-only-ness. */ | |
15709 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
15710 | return "*"; | |
15711 | return "-"; | |
15712 | ||
15713 | case '%': | |
15714 | return "%"; | |
15715 | ||
2311178e | 15716 | case '[': |
1af9f229 RS |
15717 | { |
15718 | int i; | |
15719 | char *p; | |
15720 | ||
15721 | if (command_loop_level > 5) | |
15722 | return "[[[... "; | |
15723 | p = decode_mode_spec_buf; | |
15724 | for (i = 0; i < command_loop_level; i++) | |
15725 | *p++ = '['; | |
15726 | *p = 0; | |
15727 | return decode_mode_spec_buf; | |
15728 | } | |
15729 | ||
2311178e | 15730 | case ']': |
1af9f229 RS |
15731 | { |
15732 | int i; | |
15733 | char *p; | |
15734 | ||
15735 | if (command_loop_level > 5) | |
15736 | return " ...]]]"; | |
15737 | p = decode_mode_spec_buf; | |
15738 | for (i = 0; i < command_loop_level; i++) | |
15739 | *p++ = ']'; | |
15740 | *p = 0; | |
15741 | return decode_mode_spec_buf; | |
15742 | } | |
15743 | ||
15744 | case '-': | |
15745 | { | |
1af9f229 | 15746 | register int i; |
5f5c8ee5 GM |
15747 | |
15748 | /* Let lots_of_dashes be a string of infinite length. */ | |
fec8f23e KS |
15749 | if (!NILP (mode_line_string_list)) |
15750 | return "--"; | |
5f5c8ee5 GM |
15751 | if (field_width <= 0 |
15752 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 15753 | { |
5f5c8ee5 GM |
15754 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
15755 | decode_mode_spec_buf[i] = '-'; | |
15756 | decode_mode_spec_buf[i] = '\0'; | |
15757 | return decode_mode_spec_buf; | |
1af9f229 | 15758 | } |
5f5c8ee5 GM |
15759 | else |
15760 | return lots_of_dashes; | |
1af9f229 RS |
15761 | } |
15762 | ||
2311178e | 15763 | case 'b': |
d39b6696 | 15764 | obj = b->name; |
a2889657 JB |
15765 | break; |
15766 | ||
1af9f229 RS |
15767 | case 'c': |
15768 | { | |
2311178e | 15769 | int col = (int) current_column (); /* iftc */ |
ac90c44f | 15770 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 15771 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
15772 | return decode_mode_spec_buf; |
15773 | } | |
15774 | ||
15775 | case 'F': | |
15776 | /* %F displays the frame name. */ | |
5f5c8ee5 | 15777 | if (!NILP (f->title)) |
2051c264 | 15778 | return (char *) SDATA (f->title); |
fd8ff63d | 15779 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
2051c264 | 15780 | return (char *) SDATA (f->name); |
9c6da96f | 15781 | return "Emacs"; |
1af9f229 | 15782 | |
2311178e | 15783 | case 'f': |
d39b6696 | 15784 | obj = b->filename; |
a2889657 JB |
15785 | break; |
15786 | ||
aa6d10fa RS |
15787 | case 'l': |
15788 | { | |
12adba34 RS |
15789 | int startpos = XMARKER (w->start)->charpos; |
15790 | int startpos_byte = marker_byte_position (w->start); | |
15791 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 15792 | int nlines, junk; |
da8b7f4f | 15793 | int height = WINDOW_TOTAL_LINES (w); |
aa6d10fa | 15794 | |
2311178e | 15795 | /* If we decided that this buffer isn't suitable for line numbers, |
aa6d10fa RS |
15796 | don't forget that too fast. */ |
15797 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 15798 | goto no_value; |
5300fd39 RS |
15799 | /* But do forget it, if the window shows a different buffer now. */ |
15800 | else if (BUFFERP (w->base_line_pos)) | |
15801 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
15802 | |
15803 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 15804 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 15805 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
15806 | { |
15807 | w->base_line_pos = Qnil; | |
15808 | w->base_line_number = Qnil; | |
766525bc | 15809 | goto no_value; |
aa6d10fa RS |
15810 | } |
15811 | ||
15812 | if (!NILP (w->base_line_number) | |
15813 | && !NILP (w->base_line_pos) | |
12adba34 | 15814 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
15815 | { |
15816 | line = XFASTINT (w->base_line_number); | |
15817 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 15818 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
15819 | } |
15820 | else | |
15821 | { | |
15822 | line = 1; | |
d39b6696 | 15823 | linepos = BUF_BEGV (b); |
12adba34 | 15824 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
15825 | } |
15826 | ||
15827 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
15828 | nlines = display_count_lines (linepos, linepos_byte, |
15829 | startpos_byte, | |
15830 | startpos, &junk); | |
aa6d10fa RS |
15831 | |
15832 | topline = nlines + line; | |
15833 | ||
15834 | /* Determine a new base line, if the old one is too close | |
15835 | or too far away, or if we did not have one. | |
15836 | "Too close" means it's plausible a scroll-down would | |
15837 | go back past it. */ | |
d39b6696 | 15838 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 15839 | { |
ac90c44f GM |
15840 | w->base_line_number = make_number (topline); |
15841 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
15842 | } |
15843 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 15844 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 15845 | { |
d39b6696 | 15846 | int limit = BUF_BEGV (b); |
12adba34 | 15847 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 15848 | int position; |
5d121aec | 15849 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
15850 | |
15851 | if (startpos - distance > limit) | |
12adba34 RS |
15852 | { |
15853 | limit = startpos - distance; | |
15854 | limit_byte = CHAR_TO_BYTE (limit); | |
15855 | } | |
aa6d10fa | 15856 | |
12adba34 RS |
15857 | nlines = display_count_lines (startpos, startpos_byte, |
15858 | limit_byte, | |
15859 | - (height * 2 + 30), | |
aa6d10fa | 15860 | &position); |
2311178e | 15861 | /* If we couldn't find the lines we wanted within |
5d121aec | 15862 | line_number_display_limit_width chars per line, |
aa6d10fa | 15863 | give up on line numbers for this window. */ |
12adba34 | 15864 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
15865 | { |
15866 | w->base_line_pos = w->buffer; | |
15867 | w->base_line_number = Qnil; | |
766525bc | 15868 | goto no_value; |
aa6d10fa RS |
15869 | } |
15870 | ||
ac90c44f GM |
15871 | w->base_line_number = make_number (topline - nlines); |
15872 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
15873 | } |
15874 | ||
15875 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
15876 | nlines = display_count_lines (startpos, startpos_byte, |
15877 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
15878 | |
15879 | /* Record that we did display the line number. */ | |
15880 | line_number_displayed = 1; | |
15881 | ||
15882 | /* Make the string to show. */ | |
5f5c8ee5 | 15883 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 15884 | return decode_mode_spec_buf; |
766525bc RS |
15885 | no_value: |
15886 | { | |
15887 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
15888 | int pad = field_width - 2; |
15889 | while (pad-- > 0) | |
15890 | *p++ = ' '; | |
15891 | *p++ = '?'; | |
b357b9d4 KR |
15892 | *p++ = '?'; |
15893 | *p = '\0'; | |
766525bc RS |
15894 | return decode_mode_spec_buf; |
15895 | } | |
aa6d10fa RS |
15896 | } |
15897 | break; | |
15898 | ||
2311178e | 15899 | case 'm': |
d39b6696 | 15900 | obj = b->mode_name; |
a2889657 JB |
15901 | break; |
15902 | ||
15903 | case 'n': | |
d39b6696 | 15904 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
15905 | return " Narrow"; |
15906 | break; | |
15907 | ||
a2889657 JB |
15908 | case 'p': |
15909 | { | |
15910 | int pos = marker_position (w->start); | |
d39b6696 | 15911 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 15912 | |
d39b6696 | 15913 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 15914 | { |
d39b6696 | 15915 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
15916 | return "All"; |
15917 | else | |
15918 | return "Bottom"; | |
15919 | } | |
d39b6696 | 15920 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
15921 | return "Top"; |
15922 | else | |
15923 | { | |
3c7d31b9 RS |
15924 | if (total > 1000000) |
15925 | /* Do it differently for a large value, to avoid overflow. */ | |
15926 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
15927 | else | |
15928 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
15929 | /* We can't normally display a 3-digit number, |
15930 | so get us a 2-digit number that is close. */ | |
15931 | if (total == 100) | |
15932 | total = 99; | |
15933 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
15934 | return decode_mode_spec_buf; | |
15935 | } | |
15936 | } | |
15937 | ||
8ffcb79f RS |
15938 | /* Display percentage of size above the bottom of the screen. */ |
15939 | case 'P': | |
15940 | { | |
15941 | int toppos = marker_position (w->start); | |
d39b6696 KH |
15942 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
15943 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 15944 | |
d39b6696 | 15945 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 15946 | { |
d39b6696 | 15947 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
15948 | return "All"; |
15949 | else | |
15950 | return "Bottom"; | |
15951 | } | |
15952 | else | |
15953 | { | |
3c7d31b9 RS |
15954 | if (total > 1000000) |
15955 | /* Do it differently for a large value, to avoid overflow. */ | |
15956 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
15957 | else | |
15958 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
15959 | /* We can't normally display a 3-digit number, |
15960 | so get us a 2-digit number that is close. */ | |
15961 | if (total == 100) | |
15962 | total = 99; | |
d39b6696 | 15963 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
15964 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
15965 | else | |
15966 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
15967 | return decode_mode_spec_buf; | |
15968 | } | |
15969 | } | |
15970 | ||
1af9f229 RS |
15971 | case 's': |
15972 | /* status of process */ | |
15973 | obj = Fget_buffer_process (w->buffer); | |
15974 | if (NILP (obj)) | |
15975 | return "no process"; | |
15976 | #ifdef subprocesses | |
15977 | obj = Fsymbol_name (Fprocess_status (obj)); | |
15978 | #endif | |
15979 | break; | |
d39b6696 | 15980 | |
1af9f229 RS |
15981 | case 't': /* indicate TEXT or BINARY */ |
15982 | #ifdef MODE_LINE_BINARY_TEXT | |
15983 | return MODE_LINE_BINARY_TEXT (b); | |
15984 | #else | |
15985 | return "T"; | |
15986 | #endif | |
1c9241f5 KH |
15987 | |
15988 | case 'z': | |
15989 | /* coding-system (not including end-of-line format) */ | |
15990 | case 'Z': | |
15991 | /* coding-system (including end-of-line type) */ | |
15992 | { | |
15993 | int eol_flag = (c == 'Z'); | |
539b4d41 | 15994 | char *p = decode_mode_spec_buf; |
1c9241f5 | 15995 | |
d30e754b | 15996 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 15997 | { |
11c52c4f RS |
15998 | /* No need to mention EOL here--the terminal never needs |
15999 | to do EOL conversion. */ | |
16000 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
16001 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 16002 | } |
f13c925f | 16003 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 16004 | p, eol_flag); |
f13c925f | 16005 | |
11c52c4f | 16006 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
16007 | #ifdef subprocesses |
16008 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
16009 | if (PROCESSP (obj)) | |
16010 | { | |
16011 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
16012 | p, eol_flag); | |
16013 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
16014 | p, eol_flag); | |
16015 | } | |
16016 | #endif /* subprocesses */ | |
11c52c4f | 16017 | #endif /* 0 */ |
1c9241f5 KH |
16018 | *p = 0; |
16019 | return decode_mode_spec_buf; | |
16020 | } | |
a2889657 | 16021 | } |
d39b6696 | 16022 | |
e24c997d | 16023 | if (STRINGP (obj)) |
72f62cb5 GM |
16024 | { |
16025 | *multibyte = STRING_MULTIBYTE (obj); | |
2051c264 | 16026 | return (char *) SDATA (obj); |
72f62cb5 | 16027 | } |
a2889657 JB |
16028 | else |
16029 | return ""; | |
16030 | } | |
5f5c8ee5 GM |
16031 | |
16032 | ||
12adba34 RS |
16033 | /* Count up to COUNT lines starting from START / START_BYTE. |
16034 | But don't go beyond LIMIT_BYTE. | |
16035 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 16036 | |
12adba34 | 16037 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
16038 | |
16039 | static int | |
12adba34 RS |
16040 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
16041 | int start, start_byte, limit_byte, count; | |
16042 | int *byte_pos_ptr; | |
59b49f63 | 16043 | { |
59b49f63 RS |
16044 | register unsigned char *cursor; |
16045 | unsigned char *base; | |
16046 | ||
16047 | register int ceiling; | |
16048 | register unsigned char *ceiling_addr; | |
12adba34 | 16049 | int orig_count = count; |
59b49f63 RS |
16050 | |
16051 | /* If we are not in selective display mode, | |
16052 | check only for newlines. */ | |
12adba34 RS |
16053 | int selective_display = (!NILP (current_buffer->selective_display) |
16054 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
16055 | |
16056 | if (count > 0) | |
12adba34 RS |
16057 | { |
16058 | while (start_byte < limit_byte) | |
16059 | { | |
16060 | ceiling = BUFFER_CEILING_OF (start_byte); | |
16061 | ceiling = min (limit_byte - 1, ceiling); | |
16062 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
16063 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
16064 | while (1) | |
16065 | { | |
16066 | if (selective_display) | |
16067 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
16068 | ; | |
16069 | else | |
16070 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
16071 | ; | |
16072 | ||
16073 | if (cursor != ceiling_addr) | |
16074 | { | |
16075 | if (--count == 0) | |
16076 | { | |
16077 | start_byte += cursor - base + 1; | |
16078 | *byte_pos_ptr = start_byte; | |
16079 | return orig_count; | |
16080 | } | |
16081 | else | |
16082 | if (++cursor == ceiling_addr) | |
16083 | break; | |
16084 | } | |
16085 | else | |
16086 | break; | |
16087 | } | |
16088 | start_byte += cursor - base; | |
16089 | } | |
16090 | } | |
59b49f63 RS |
16091 | else |
16092 | { | |
12adba34 RS |
16093 | while (start_byte > limit_byte) |
16094 | { | |
16095 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
16096 | ceiling = max (limit_byte, ceiling); | |
16097 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
16098 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
16099 | while (1) |
16100 | { | |
12adba34 RS |
16101 | if (selective_display) |
16102 | while (--cursor != ceiling_addr | |
16103 | && *cursor != '\n' && *cursor != 015) | |
16104 | ; | |
16105 | else | |
16106 | while (--cursor != ceiling_addr && *cursor != '\n') | |
16107 | ; | |
16108 | ||
59b49f63 RS |
16109 | if (cursor != ceiling_addr) |
16110 | { | |
16111 | if (++count == 0) | |
16112 | { | |
12adba34 RS |
16113 | start_byte += cursor - base + 1; |
16114 | *byte_pos_ptr = start_byte; | |
16115 | /* When scanning backwards, we should | |
16116 | not count the newline posterior to which we stop. */ | |
16117 | return - orig_count - 1; | |
59b49f63 RS |
16118 | } |
16119 | } | |
16120 | else | |
16121 | break; | |
16122 | } | |
12adba34 RS |
16123 | /* Here we add 1 to compensate for the last decrement |
16124 | of CURSOR, which took it past the valid range. */ | |
16125 | start_byte += cursor - base + 1; | |
59b49f63 RS |
16126 | } |
16127 | } | |
16128 | ||
12adba34 | 16129 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 16130 | |
12adba34 RS |
16131 | if (count < 0) |
16132 | return - orig_count + count; | |
16133 | return orig_count - count; | |
aa6d10fa | 16134 | |
12adba34 | 16135 | } |
a2889657 | 16136 | |
a2889657 | 16137 | |
5f5c8ee5 GM |
16138 | \f |
16139 | /*********************************************************************** | |
16140 | Displaying strings | |
16141 | ***********************************************************************/ | |
278feba9 | 16142 | |
5f5c8ee5 | 16143 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 16144 | |
5f5c8ee5 GM |
16145 | If STRING is non-null, display that C string. Otherwise, the Lisp |
16146 | string LISP_STRING is displayed. | |
a2889657 | 16147 | |
5f5c8ee5 GM |
16148 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
16149 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
16150 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 16151 | |
5f5c8ee5 GM |
16152 | Display the string in the environment given by IT, but use the |
16153 | standard display table, temporarily. | |
a3788d53 | 16154 | |
5f5c8ee5 GM |
16155 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
16156 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
16157 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
16158 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
2311178e | 16159 | |
5f5c8ee5 GM |
16160 | PRECISION is the maximum number of characters to output from |
16161 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 16162 | |
5f5c8ee5 | 16163 | This is roughly equivalent to printf format specifiers: |
a2889657 | 16164 | |
5f5c8ee5 GM |
16165 | FIELD_WIDTH PRECISION PRINTF |
16166 | ---------------------------------------- | |
16167 | -1 -1 %s | |
16168 | -1 10 %.10s | |
16169 | 10 -1 %10s | |
16170 | 20 10 %20.10s | |
a2889657 | 16171 | |
5f5c8ee5 GM |
16172 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
16173 | display them, and < 0 means obey the current buffer's value of | |
16174 | enable_multibyte_characters. | |
278feba9 | 16175 | |
5f5c8ee5 | 16176 | Value is the number of glyphs produced. */ |
b1d1124b | 16177 | |
5f5c8ee5 GM |
16178 | static int |
16179 | display_string (string, lisp_string, face_string, face_string_pos, | |
16180 | start, it, field_width, precision, max_x, multibyte) | |
16181 | unsigned char *string; | |
16182 | Lisp_Object lisp_string; | |
68c45bf0 PE |
16183 | Lisp_Object face_string; |
16184 | int face_string_pos; | |
5f5c8ee5 GM |
16185 | int start; |
16186 | struct it *it; | |
16187 | int field_width, precision, max_x; | |
16188 | int multibyte; | |
16189 | { | |
16190 | int hpos_at_start = it->hpos; | |
16191 | int saved_face_id = it->face_id; | |
16192 | struct glyph_row *row = it->glyph_row; | |
16193 | ||
16194 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 16195 | with index START. */ |
5f5c8ee5 GM |
16196 | reseat_to_string (it, string, lisp_string, start, |
16197 | precision, field_width, multibyte); | |
16198 | ||
16199 | /* If displaying STRING, set up the face of the iterator | |
16200 | from LISP_STRING, if that's given. */ | |
16201 | if (STRINGP (face_string)) | |
16202 | { | |
16203 | int endptr; | |
16204 | struct face *face; | |
2311178e | 16205 | |
5f5c8ee5 GM |
16206 | it->face_id |
16207 | = face_at_string_position (it->w, face_string, face_string_pos, | |
16208 | 0, it->region_beg_charpos, | |
16209 | it->region_end_charpos, | |
5de7c6f2 | 16210 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
16211 | face = FACE_FROM_ID (it->f, it->face_id); |
16212 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 16213 | } |
a2889657 | 16214 | |
5f5c8ee5 GM |
16215 | /* Set max_x to the maximum allowed X position. Don't let it go |
16216 | beyond the right edge of the window. */ | |
16217 | if (max_x <= 0) | |
16218 | max_x = it->last_visible_x; | |
16219 | else | |
16220 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 16221 | |
5f5c8ee5 GM |
16222 | /* Skip over display elements that are not visible. because IT->w is |
16223 | hscrolled. */ | |
16224 | if (it->current_x < it->first_visible_x) | |
16225 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
16226 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 16227 | |
5f5c8ee5 GM |
16228 | row->ascent = it->max_ascent; |
16229 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
16230 | row->phys_ascent = it->max_phys_ascent; |
16231 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 16232 | |
5f5c8ee5 GM |
16233 | /* This condition is for the case that we are called with current_x |
16234 | past last_visible_x. */ | |
16235 | while (it->current_x < max_x) | |
a2889657 | 16236 | { |
5f5c8ee5 | 16237 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 16238 | |
5f5c8ee5 GM |
16239 | /* Get the next display element. */ |
16240 | if (!get_next_display_element (it)) | |
90adcf20 | 16241 | break; |
1c9241f5 | 16242 | |
5f5c8ee5 GM |
16243 | /* Produce glyphs. */ |
16244 | x_before = it->current_x; | |
16245 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
16246 | PRODUCE_GLYPHS (it); | |
90adcf20 | 16247 | |
5f5c8ee5 GM |
16248 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
16249 | i = 0; | |
16250 | x = x_before; | |
16251 | while (i < nglyphs) | |
a2889657 | 16252 | { |
5f5c8ee5 | 16253 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
2311178e | 16254 | |
5f5c8ee5 GM |
16255 | if (!it->truncate_lines_p |
16256 | && x + glyph->pixel_width > max_x) | |
16257 | { | |
16258 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
16259 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
16260 | { | |
16261 | /* A wide character is unbreakable. */ | |
16262 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
16263 | it->current_x = x_before; | |
16264 | } | |
16265 | else | |
16266 | { | |
16267 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
16268 | it->current_x = x; | |
16269 | } | |
5f5c8ee5 GM |
16270 | break; |
16271 | } | |
16272 | else if (x + glyph->pixel_width > it->first_visible_x) | |
16273 | { | |
16274 | /* Glyph is at least partially visible. */ | |
16275 | ++it->hpos; | |
16276 | if (x < it->first_visible_x) | |
16277 | it->glyph_row->x = x - it->first_visible_x; | |
16278 | } | |
16279 | else | |
a2889657 | 16280 | { |
5f5c8ee5 GM |
16281 | /* Glyph is off the left margin of the display area. |
16282 | Should not happen. */ | |
16283 | abort (); | |
a2889657 | 16284 | } |
5f5c8ee5 GM |
16285 | |
16286 | row->ascent = max (row->ascent, it->max_ascent); | |
16287 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
16288 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
16289 | row->phys_height = max (row->phys_height, | |
16290 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
16291 | x += glyph->pixel_width; |
16292 | ++i; | |
a2889657 | 16293 | } |
5f5c8ee5 GM |
16294 | |
16295 | /* Stop if max_x reached. */ | |
16296 | if (i < nglyphs) | |
16297 | break; | |
16298 | ||
16299 | /* Stop at line ends. */ | |
16300 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 16301 | { |
5f5c8ee5 GM |
16302 | it->continuation_lines_width = 0; |
16303 | break; | |
a2889657 | 16304 | } |
1c9241f5 | 16305 | |
cafafe0b | 16306 | set_iterator_to_next (it, 1); |
a688bb24 | 16307 | |
5f5c8ee5 GM |
16308 | /* Stop if truncating at the right edge. */ |
16309 | if (it->truncate_lines_p | |
16310 | && it->current_x >= it->last_visible_x) | |
16311 | { | |
16312 | /* Add truncation mark, but don't do it if the line is | |
16313 | truncated at a padding space. */ | |
16314 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 16315 | { |
5f5c8ee5 | 16316 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
16317 | { |
16318 | int i, n; | |
16319 | ||
9299cb15 | 16320 | if (it->current_x > it->last_visible_x) |
37be86f2 | 16321 | { |
9299cb15 KH |
16322 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
16323 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
16324 | break; | |
16325 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
16326 | { | |
16327 | row->used[TEXT_AREA] = i; | |
16328 | produce_special_glyphs (it, IT_TRUNCATION); | |
16329 | } | |
37be86f2 | 16330 | } |
9299cb15 | 16331 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 16332 | } |
5f5c8ee5 | 16333 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 16334 | } |
5f5c8ee5 | 16335 | break; |
1c9241f5 | 16336 | } |
a2889657 JB |
16337 | } |
16338 | ||
5f5c8ee5 GM |
16339 | /* Maybe insert a truncation at the left. */ |
16340 | if (it->first_visible_x | |
16341 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 16342 | { |
5f5c8ee5 GM |
16343 | if (!FRAME_WINDOW_P (it->f)) |
16344 | insert_left_trunc_glyphs (it); | |
16345 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
16346 | } |
16347 | ||
5f5c8ee5 | 16348 | it->face_id = saved_face_id; |
2311178e | 16349 | |
5f5c8ee5 GM |
16350 | /* Value is number of columns displayed. */ |
16351 | return it->hpos - hpos_at_start; | |
16352 | } | |
a2889657 | 16353 | |
a2889657 | 16354 | |
a2889657 | 16355 | \f |
3b6b6db7 | 16356 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
16357 | appears as an element of LIST or as the car of an element of LIST. |
16358 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
16359 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
16360 | Otherwise return 0. This function cannot quit. | |
16361 | The return value is 2 if the text is invisible but with an ellipsis | |
16362 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
16363 | |
16364 | int | |
16365 | invisible_p (propval, list) | |
16366 | register Lisp_Object propval; | |
16367 | Lisp_Object list; | |
16368 | { | |
3b6b6db7 | 16369 | register Lisp_Object tail, proptail; |
2311178e | 16370 | |
3b6b6db7 SM |
16371 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
16372 | { | |
16373 | register Lisp_Object tem; | |
16374 | tem = XCAR (tail); | |
16375 | if (EQ (propval, tem)) | |
16376 | return 1; | |
16377 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
16378 | return NILP (XCDR (tem)) ? 1 : 2; | |
16379 | } | |
2311178e | 16380 | |
3b6b6db7 SM |
16381 | if (CONSP (propval)) |
16382 | { | |
16383 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
16384 | { | |
16385 | Lisp_Object propelt; | |
16386 | propelt = XCAR (proptail); | |
16387 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
16388 | { | |
16389 | register Lisp_Object tem; | |
16390 | tem = XCAR (tail); | |
16391 | if (EQ (propelt, tem)) | |
16392 | return 1; | |
16393 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
16394 | return NILP (XCDR (tem)) ? 1 : 2; | |
16395 | } | |
16396 | } | |
16397 | } | |
2311178e | 16398 | |
3b6b6db7 | 16399 | return 0; |
642eefc6 | 16400 | } |
5f5c8ee5 | 16401 | |
642eefc6 | 16402 | \f |
133c764e KS |
16403 | /*********************************************************************** |
16404 | Glyph Display | |
16405 | ***********************************************************************/ | |
16406 | ||
79fa9e0f KS |
16407 | #ifdef HAVE_WINDOW_SYSTEM |
16408 | ||
133c764e KS |
16409 | #if GLYPH_DEBUG |
16410 | ||
16411 | void | |
16412 | dump_glyph_string (s) | |
16413 | struct glyph_string *s; | |
16414 | { | |
16415 | fprintf (stderr, "glyph string\n"); | |
16416 | fprintf (stderr, " x, y, w, h = %d, %d, %d, %d\n", | |
16417 | s->x, s->y, s->width, s->height); | |
16418 | fprintf (stderr, " ybase = %d\n", s->ybase); | |
16419 | fprintf (stderr, " hl = %d\n", s->hl); | |
16420 | fprintf (stderr, " left overhang = %d, right = %d\n", | |
16421 | s->left_overhang, s->right_overhang); | |
16422 | fprintf (stderr, " nchars = %d\n", s->nchars); | |
16423 | fprintf (stderr, " extends to end of line = %d\n", | |
16424 | s->extends_to_end_of_line_p); | |
16425 | fprintf (stderr, " font height = %d\n", FONT_HEIGHT (s->font)); | |
16426 | fprintf (stderr, " bg width = %d\n", s->background_width); | |
16427 | } | |
16428 | ||
16429 | #endif /* GLYPH_DEBUG */ | |
16430 | ||
16431 | /* Initialize glyph string S. CHAR2B is a suitably allocated vector | |
16432 | of XChar2b structures for S; it can't be allocated in | |
16433 | init_glyph_string because it must be allocated via `alloca'. W | |
16434 | is the window on which S is drawn. ROW and AREA are the glyph row | |
16435 | and area within the row from which S is constructed. START is the | |
16436 | index of the first glyph structure covered by S. HL is a | |
16437 | face-override for drawing S. */ | |
16438 | ||
16439 | #ifdef HAVE_NTGUI | |
16440 | #define OPTIONAL_HDC(hdc) hdc, | |
16441 | #define DECLARE_HDC(hdc) HDC hdc; | |
16442 | #define ALLOCATE_HDC(hdc, f) hdc = get_frame_dc ((f)) | |
16443 | #define RELEASE_HDC(hdc, f) release_frame_dc ((f), (hdc)) | |
16444 | #endif | |
16445 | ||
16446 | #ifndef OPTIONAL_HDC | |
16447 | #define OPTIONAL_HDC(hdc) | |
16448 | #define DECLARE_HDC(hdc) | |
16449 | #define ALLOCATE_HDC(hdc, f) | |
16450 | #define RELEASE_HDC(hdc, f) | |
16451 | #endif | |
16452 | ||
16453 | static void | |
16454 | init_glyph_string (s, OPTIONAL_HDC (hdc) char2b, w, row, area, start, hl) | |
16455 | struct glyph_string *s; | |
16456 | DECLARE_HDC (hdc) | |
16457 | XChar2b *char2b; | |
16458 | struct window *w; | |
16459 | struct glyph_row *row; | |
16460 | enum glyph_row_area area; | |
16461 | int start; | |
16462 | enum draw_glyphs_face hl; | |
16463 | { | |
16464 | bzero (s, sizeof *s); | |
16465 | s->w = w; | |
16466 | s->f = XFRAME (w->frame); | |
16467 | #ifdef HAVE_NTGUI | |
16468 | s->hdc = hdc; | |
16469 | #endif | |
16470 | s->display = FRAME_X_DISPLAY (s->f); | |
16471 | s->window = FRAME_X_WINDOW (s->f); | |
16472 | s->char2b = char2b; | |
16473 | s->hl = hl; | |
16474 | s->row = row; | |
16475 | s->area = area; | |
16476 | s->first_glyph = row->glyphs[area] + start; | |
16477 | s->height = row->height; | |
16478 | s->y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y); | |
16479 | ||
16480 | /* Display the internal border below the tool-bar window. */ | |
16481 | if (s->w == XWINDOW (s->f->tool_bar_window)) | |
16482 | s->y -= FRAME_INTERNAL_BORDER_WIDTH (s->f); | |
16483 | ||
16484 | s->ybase = s->y + row->ascent; | |
16485 | } | |
16486 | ||
16487 | ||
16488 | /* Append the list of glyph strings with head H and tail T to the list | |
16489 | with head *HEAD and tail *TAIL. Set *HEAD and *TAIL to the result. */ | |
16490 | ||
16491 | static INLINE void | |
16492 | append_glyph_string_lists (head, tail, h, t) | |
16493 | struct glyph_string **head, **tail; | |
16494 | struct glyph_string *h, *t; | |
16495 | { | |
16496 | if (h) | |
16497 | { | |
16498 | if (*head) | |
16499 | (*tail)->next = h; | |
16500 | else | |
16501 | *head = h; | |
16502 | h->prev = *tail; | |
16503 | *tail = t; | |
16504 | } | |
16505 | } | |
16506 | ||
16507 | ||
16508 | /* Prepend the list of glyph strings with head H and tail T to the | |
16509 | list with head *HEAD and tail *TAIL. Set *HEAD and *TAIL to the | |
16510 | result. */ | |
16511 | ||
16512 | static INLINE void | |
16513 | prepend_glyph_string_lists (head, tail, h, t) | |
16514 | struct glyph_string **head, **tail; | |
16515 | struct glyph_string *h, *t; | |
16516 | { | |
16517 | if (h) | |
16518 | { | |
16519 | if (*head) | |
16520 | (*head)->prev = t; | |
16521 | else | |
16522 | *tail = t; | |
16523 | t->next = *head; | |
16524 | *head = h; | |
16525 | } | |
16526 | } | |
16527 | ||
16528 | ||
16529 | /* Append glyph string S to the list with head *HEAD and tail *TAIL. | |
16530 | Set *HEAD and *TAIL to the resulting list. */ | |
16531 | ||
16532 | static INLINE void | |
16533 | append_glyph_string (head, tail, s) | |
16534 | struct glyph_string **head, **tail; | |
16535 | struct glyph_string *s; | |
16536 | { | |
16537 | s->next = s->prev = NULL; | |
16538 | append_glyph_string_lists (head, tail, s, s); | |
16539 | } | |
16540 | ||
16541 | ||
16542 | /* Get face and two-byte form of character glyph GLYPH on frame F. | |
16543 | The encoding of GLYPH->u.ch is returned in *CHAR2B. Value is | |
16544 | a pointer to a realized face that is ready for display. */ | |
16545 | ||
16546 | static INLINE struct face * | |
16547 | get_glyph_face_and_encoding (f, glyph, char2b, two_byte_p) | |
16548 | struct frame *f; | |
16549 | struct glyph *glyph; | |
16550 | XChar2b *char2b; | |
16551 | int *two_byte_p; | |
16552 | { | |
16553 | struct face *face; | |
16554 | ||
16555 | xassert (glyph->type == CHAR_GLYPH); | |
16556 | face = FACE_FROM_ID (f, glyph->face_id); | |
16557 | ||
16558 | if (two_byte_p) | |
16559 | *two_byte_p = 0; | |
16560 | ||
16561 | if (!glyph->multibyte_p) | |
16562 | { | |
16563 | /* Unibyte case. We don't have to encode, but we have to make | |
16564 | sure to use a face suitable for unibyte. */ | |
16565 | STORE_XCHAR2B (char2b, 0, glyph->u.ch); | |
16566 | } | |
16567 | else if (glyph->u.ch < 128 | |
16568 | && glyph->face_id < BASIC_FACE_ID_SENTINEL) | |
16569 | { | |
16570 | /* Case of ASCII in a face known to fit ASCII. */ | |
16571 | STORE_XCHAR2B (char2b, 0, glyph->u.ch); | |
16572 | } | |
16573 | else | |
16574 | { | |
16575 | int c1, c2, charset; | |
16576 | ||
16577 | /* Split characters into bytes. If c2 is -1 afterwards, C is | |
16578 | really a one-byte character so that byte1 is zero. */ | |
16579 | SPLIT_CHAR (glyph->u.ch, charset, c1, c2); | |
16580 | if (c2 > 0) | |
16581 | STORE_XCHAR2B (char2b, c1, c2); | |
16582 | else | |
16583 | STORE_XCHAR2B (char2b, 0, c1); | |
16584 | ||
16585 | /* Maybe encode the character in *CHAR2B. */ | |
16586 | if (charset != CHARSET_ASCII) | |
16587 | { | |
16588 | struct font_info *font_info | |
16589 | = FONT_INFO_FROM_ID (f, face->font_info_id); | |
16590 | if (font_info) | |
16591 | glyph->font_type | |
16592 | = rif->encode_char (glyph->u.ch, char2b, font_info, two_byte_p); | |
16593 | } | |
16594 | } | |
16595 | ||
16596 | /* Make sure X resources of the face are allocated. */ | |
16597 | xassert (face != NULL); | |
16598 | PREPARE_FACE_FOR_DISPLAY (f, face); | |
16599 | return face; | |
16600 | } | |
16601 | ||
16602 | ||
16603 | /* Fill glyph string S with composition components specified by S->cmp. | |
16604 | ||
16605 | FACES is an array of faces for all components of this composition. | |
16606 | S->gidx is the index of the first component for S. | |
16607 | OVERLAPS_P non-zero means S should draw the foreground only, and | |
16608 | use its physical height for clipping. | |
16609 | ||
16610 | Value is the index of a component not in S. */ | |
16611 | ||
16612 | static int | |
16613 | fill_composite_glyph_string (s, faces, overlaps_p) | |
16614 | struct glyph_string *s; | |
16615 | struct face **faces; | |
16616 | int overlaps_p; | |
16617 | { | |
16618 | int i; | |
16619 | ||
16620 | xassert (s); | |
16621 | ||
16622 | s->for_overlaps_p = overlaps_p; | |
16623 | ||
16624 | s->face = faces[s->gidx]; | |
16625 | s->font = s->face->font; | |
16626 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
16627 | ||
16628 | /* For all glyphs of this composition, starting at the offset | |
16629 | S->gidx, until we reach the end of the definition or encounter a | |
16630 | glyph that requires the different face, add it to S. */ | |
16631 | ++s->nchars; | |
16632 | for (i = s->gidx + 1; i < s->cmp->glyph_len && faces[i] == s->face; ++i) | |
16633 | ++s->nchars; | |
16634 | ||
16635 | /* All glyph strings for the same composition has the same width, | |
16636 | i.e. the width set for the first component of the composition. */ | |
16637 | ||
16638 | s->width = s->first_glyph->pixel_width; | |
16639 | ||
16640 | /* If the specified font could not be loaded, use the frame's | |
16641 | default font, but record the fact that we couldn't load it in | |
16642 | the glyph string so that we can draw rectangles for the | |
16643 | characters of the glyph string. */ | |
16644 | if (s->font == NULL) | |
16645 | { | |
16646 | s->font_not_found_p = 1; | |
16647 | s->font = FRAME_FONT (s->f); | |
16648 | } | |
16649 | ||
16650 | /* Adjust base line for subscript/superscript text. */ | |
16651 | s->ybase += s->first_glyph->voffset; | |
16652 | ||
16653 | xassert (s->face && s->face->gc); | |
16654 | ||
16655 | /* This glyph string must always be drawn with 16-bit functions. */ | |
16656 | s->two_byte_p = 1; | |
16657 | ||
16658 | return s->gidx + s->nchars; | |
16659 | } | |
16660 | ||
16661 | ||
16662 | /* Fill glyph string S from a sequence of character glyphs. | |
16663 | ||
16664 | FACE_ID is the face id of the string. START is the index of the | |
16665 | first glyph to consider, END is the index of the last + 1. | |
16666 | OVERLAPS_P non-zero means S should draw the foreground only, and | |
16667 | use its physical height for clipping. | |
16668 | ||
16669 | Value is the index of the first glyph not in S. */ | |
16670 | ||
16671 | static int | |
16672 | fill_glyph_string (s, face_id, start, end, overlaps_p) | |
16673 | struct glyph_string *s; | |
16674 | int face_id; | |
16675 | int start, end, overlaps_p; | |
16676 | { | |
16677 | struct glyph *glyph, *last; | |
16678 | int voffset; | |
16679 | int glyph_not_available_p; | |
16680 | ||
16681 | xassert (s->f == XFRAME (s->w->frame)); | |
16682 | xassert (s->nchars == 0); | |
16683 | xassert (start >= 0 && end > start); | |
16684 | ||
16685 | s->for_overlaps_p = overlaps_p, | |
16686 | glyph = s->row->glyphs[s->area] + start; | |
16687 | last = s->row->glyphs[s->area] + end; | |
16688 | voffset = glyph->voffset; | |
16689 | ||
16690 | glyph_not_available_p = glyph->glyph_not_available_p; | |
16691 | ||
16692 | while (glyph < last | |
16693 | && glyph->type == CHAR_GLYPH | |
16694 | && glyph->voffset == voffset | |
16695 | /* Same face id implies same font, nowadays. */ | |
16696 | && glyph->face_id == face_id | |
16697 | && glyph->glyph_not_available_p == glyph_not_available_p) | |
16698 | { | |
16699 | int two_byte_p; | |
16700 | ||
16701 | s->face = get_glyph_face_and_encoding (s->f, glyph, | |
16702 | s->char2b + s->nchars, | |
16703 | &two_byte_p); | |
16704 | s->two_byte_p = two_byte_p; | |
16705 | ++s->nchars; | |
16706 | xassert (s->nchars <= end - start); | |
16707 | s->width += glyph->pixel_width; | |
16708 | ++glyph; | |
16709 | } | |
16710 | ||
16711 | s->font = s->face->font; | |
16712 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
16713 | ||
16714 | /* If the specified font could not be loaded, use the frame's font, | |
16715 | but record the fact that we couldn't load it in | |
16716 | S->font_not_found_p so that we can draw rectangles for the | |
16717 | characters of the glyph string. */ | |
16718 | if (s->font == NULL || glyph_not_available_p) | |
16719 | { | |
16720 | s->font_not_found_p = 1; | |
16721 | s->font = FRAME_FONT (s->f); | |
16722 | } | |
16723 | ||
16724 | /* Adjust base line for subscript/superscript text. */ | |
16725 | s->ybase += voffset; | |
16726 | ||
16727 | xassert (s->face && s->face->gc); | |
16728 | return glyph - s->row->glyphs[s->area]; | |
16729 | } | |
16730 | ||
16731 | ||
16732 | /* Fill glyph string S from image glyph S->first_glyph. */ | |
16733 | ||
16734 | static void | |
16735 | fill_image_glyph_string (s) | |
16736 | struct glyph_string *s; | |
16737 | { | |
16738 | xassert (s->first_glyph->type == IMAGE_GLYPH); | |
16739 | s->img = IMAGE_FROM_ID (s->f, s->first_glyph->u.img_id); | |
16740 | xassert (s->img); | |
16741 | s->face = FACE_FROM_ID (s->f, s->first_glyph->face_id); | |
16742 | s->font = s->face->font; | |
16743 | s->width = s->first_glyph->pixel_width; | |
16744 | ||
16745 | /* Adjust base line for subscript/superscript text. */ | |
16746 | s->ybase += s->first_glyph->voffset; | |
16747 | } | |
16748 | ||
16749 | ||
16750 | /* Fill glyph string S from a sequence of stretch glyphs. | |
16751 | ||
16752 | ROW is the glyph row in which the glyphs are found, AREA is the | |
16753 | area within the row. START is the index of the first glyph to | |
16754 | consider, END is the index of the last + 1. | |
16755 | ||
16756 | Value is the index of the first glyph not in S. */ | |
16757 | ||
16758 | static int | |
16759 | fill_stretch_glyph_string (s, row, area, start, end) | |
16760 | struct glyph_string *s; | |
16761 | struct glyph_row *row; | |
16762 | enum glyph_row_area area; | |
16763 | int start, end; | |
16764 | { | |
16765 | struct glyph *glyph, *last; | |
16766 | int voffset, face_id; | |
16767 | ||
16768 | xassert (s->first_glyph->type == STRETCH_GLYPH); | |
16769 | ||
16770 | glyph = s->row->glyphs[s->area] + start; | |
16771 | last = s->row->glyphs[s->area] + end; | |
16772 | face_id = glyph->face_id; | |
16773 | s->face = FACE_FROM_ID (s->f, face_id); | |
16774 | s->font = s->face->font; | |
16775 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
16776 | s->width = glyph->pixel_width; | |
16777 | voffset = glyph->voffset; | |
16778 | ||
16779 | for (++glyph; | |
16780 | (glyph < last | |
16781 | && glyph->type == STRETCH_GLYPH | |
16782 | && glyph->voffset == voffset | |
16783 | && glyph->face_id == face_id); | |
16784 | ++glyph) | |
16785 | s->width += glyph->pixel_width; | |
16786 | ||
16787 | /* Adjust base line for subscript/superscript text. */ | |
16788 | s->ybase += voffset; | |
16789 | ||
16790 | /* The case that face->gc == 0 is handled when drawing the glyph | |
16791 | string by calling PREPARE_FACE_FOR_DISPLAY. */ | |
16792 | xassert (s->face); | |
16793 | return glyph - s->row->glyphs[s->area]; | |
16794 | } | |
16795 | ||
16796 | ||
16797 | /* EXPORT for RIF: | |
16798 | Set *LEFT and *RIGHT to the left and right overhang of GLYPH on | |
16799 | frame F. Overhangs of glyphs other than type CHAR_GLYPH are | |
16800 | assumed to be zero. */ | |
16801 | ||
16802 | void | |
16803 | x_get_glyph_overhangs (glyph, f, left, right) | |
16804 | struct glyph *glyph; | |
16805 | struct frame *f; | |
16806 | int *left, *right; | |
16807 | { | |
16808 | *left = *right = 0; | |
16809 | ||
16810 | if (glyph->type == CHAR_GLYPH) | |
16811 | { | |
16812 | XFontStruct *font; | |
16813 | struct face *face; | |
16814 | struct font_info *font_info; | |
16815 | XChar2b char2b; | |
16816 | XCharStruct *pcm; | |
16817 | ||
16818 | face = get_glyph_face_and_encoding (f, glyph, &char2b, NULL); | |
16819 | font = face->font; | |
16820 | font_info = FONT_INFO_FROM_ID (f, face->font_info_id); | |
16821 | if (font /* ++KFS: Should this be font_info ? */ | |
16822 | && (pcm = rif->per_char_metric (font, &char2b, glyph->font_type))) | |
16823 | { | |
16824 | if (pcm->rbearing > pcm->width) | |
16825 | *right = pcm->rbearing - pcm->width; | |
16826 | if (pcm->lbearing < 0) | |
16827 | *left = -pcm->lbearing; | |
16828 | } | |
16829 | } | |
16830 | } | |
16831 | ||
16832 | ||
16833 | /* Return the index of the first glyph preceding glyph string S that | |
16834 | is overwritten by S because of S's left overhang. Value is -1 | |
16835 | if no glyphs are overwritten. */ | |
16836 | ||
16837 | static int | |
16838 | left_overwritten (s) | |
16839 | struct glyph_string *s; | |
16840 | { | |
16841 | int k; | |
16842 | ||
16843 | if (s->left_overhang) | |
16844 | { | |
16845 | int x = 0, i; | |
16846 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16847 | int first = s->first_glyph - glyphs; | |
16848 | ||
16849 | for (i = first - 1; i >= 0 && x > -s->left_overhang; --i) | |
16850 | x -= glyphs[i].pixel_width; | |
16851 | ||
16852 | k = i + 1; | |
16853 | } | |
16854 | else | |
16855 | k = -1; | |
16856 | ||
16857 | return k; | |
16858 | } | |
16859 | ||
16860 | ||
16861 | /* Return the index of the first glyph preceding glyph string S that | |
16862 | is overwriting S because of its right overhang. Value is -1 if no | |
16863 | glyph in front of S overwrites S. */ | |
16864 | ||
16865 | static int | |
16866 | left_overwriting (s) | |
16867 | struct glyph_string *s; | |
16868 | { | |
16869 | int i, k, x; | |
16870 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16871 | int first = s->first_glyph - glyphs; | |
16872 | ||
16873 | k = -1; | |
16874 | x = 0; | |
16875 | for (i = first - 1; i >= 0; --i) | |
16876 | { | |
16877 | int left, right; | |
16878 | x_get_glyph_overhangs (glyphs + i, s->f, &left, &right); | |
16879 | if (x + right > 0) | |
16880 | k = i; | |
16881 | x -= glyphs[i].pixel_width; | |
16882 | } | |
16883 | ||
16884 | return k; | |
16885 | } | |
16886 | ||
16887 | ||
16888 | /* Return the index of the last glyph following glyph string S that is | |
16889 | not overwritten by S because of S's right overhang. Value is -1 if | |
16890 | no such glyph is found. */ | |
16891 | ||
16892 | static int | |
16893 | right_overwritten (s) | |
16894 | struct glyph_string *s; | |
16895 | { | |
16896 | int k = -1; | |
16897 | ||
16898 | if (s->right_overhang) | |
16899 | { | |
16900 | int x = 0, i; | |
16901 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16902 | int first = (s->first_glyph - glyphs) + (s->cmp ? 1 : s->nchars); | |
16903 | int end = s->row->used[s->area]; | |
16904 | ||
16905 | for (i = first; i < end && s->right_overhang > x; ++i) | |
16906 | x += glyphs[i].pixel_width; | |
16907 | ||
16908 | k = i; | |
16909 | } | |
16910 | ||
16911 | return k; | |
16912 | } | |
16913 | ||
16914 | ||
16915 | /* Return the index of the last glyph following glyph string S that | |
16916 | overwrites S because of its left overhang. Value is negative | |
16917 | if no such glyph is found. */ | |
16918 | ||
16919 | static int | |
16920 | right_overwriting (s) | |
16921 | struct glyph_string *s; | |
16922 | { | |
16923 | int i, k, x; | |
16924 | int end = s->row->used[s->area]; | |
16925 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16926 | int first = (s->first_glyph - glyphs) + (s->cmp ? 1 : s->nchars); | |
16927 | ||
16928 | k = -1; | |
16929 | x = 0; | |
16930 | for (i = first; i < end; ++i) | |
16931 | { | |
16932 | int left, right; | |
16933 | x_get_glyph_overhangs (glyphs + i, s->f, &left, &right); | |
16934 | if (x - left < 0) | |
16935 | k = i; | |
16936 | x += glyphs[i].pixel_width; | |
16937 | } | |
16938 | ||
16939 | return k; | |
16940 | } | |
16941 | ||
16942 | ||
16943 | /* Get face and two-byte form of character C in face FACE_ID on frame | |
16944 | F. The encoding of C is returned in *CHAR2B. MULTIBYTE_P non-zero | |
16945 | means we want to display multibyte text. DISPLAY_P non-zero means | |
16946 | make sure that X resources for the face returned are allocated. | |
16947 | Value is a pointer to a realized face that is ready for display if | |
16948 | DISPLAY_P is non-zero. */ | |
16949 | ||
16950 | static INLINE struct face * | |
16951 | get_char_face_and_encoding (f, c, face_id, char2b, multibyte_p, display_p) | |
16952 | struct frame *f; | |
16953 | int c, face_id; | |
16954 | XChar2b *char2b; | |
16955 | int multibyte_p, display_p; | |
16956 | { | |
16957 | struct face *face = FACE_FROM_ID (f, face_id); | |
16958 | ||
16959 | if (!multibyte_p) | |
16960 | { | |
16961 | /* Unibyte case. We don't have to encode, but we have to make | |
16962 | sure to use a face suitable for unibyte. */ | |
16963 | STORE_XCHAR2B (char2b, 0, c); | |
16964 | face_id = FACE_FOR_CHAR (f, face, c); | |
16965 | face = FACE_FROM_ID (f, face_id); | |
16966 | } | |
16967 | else if (c < 128 && face_id < BASIC_FACE_ID_SENTINEL) | |
16968 | { | |
16969 | /* Case of ASCII in a face known to fit ASCII. */ | |
16970 | STORE_XCHAR2B (char2b, 0, c); | |
16971 | } | |
16972 | else | |
16973 | { | |
16974 | int c1, c2, charset; | |
16975 | ||
16976 | /* Split characters into bytes. If c2 is -1 afterwards, C is | |
16977 | really a one-byte character so that byte1 is zero. */ | |
16978 | SPLIT_CHAR (c, charset, c1, c2); | |
16979 | if (c2 > 0) | |
16980 | STORE_XCHAR2B (char2b, c1, c2); | |
16981 | else | |
16982 | STORE_XCHAR2B (char2b, 0, c1); | |
16983 | ||
16984 | /* Maybe encode the character in *CHAR2B. */ | |
16985 | if (face->font != NULL) | |
16986 | { | |
16987 | struct font_info *font_info | |
16988 | = FONT_INFO_FROM_ID (f, face->font_info_id); | |
16989 | if (font_info) | |
16990 | rif->encode_char (c, char2b, font_info, 0); | |
16991 | } | |
16992 | } | |
16993 | ||
16994 | /* Make sure X resources of the face are allocated. */ | |
16995 | #ifdef HAVE_X_WINDOWS | |
16996 | if (display_p) | |
16997 | #endif | |
16998 | { | |
16999 | xassert (face != NULL); | |
17000 | PREPARE_FACE_FOR_DISPLAY (f, face); | |
17001 | } | |
17002 | ||
17003 | return face; | |
17004 | } | |
17005 | ||
17006 | ||
17007 | /* Set background width of glyph string S. START is the index of the | |
17008 | first glyph following S. LAST_X is the right-most x-position + 1 | |
17009 | in the drawing area. */ | |
17010 | ||
17011 | static INLINE void | |
17012 | set_glyph_string_background_width (s, start, last_x) | |
17013 | struct glyph_string *s; | |
17014 | int start; | |
17015 | int last_x; | |
17016 | { | |
17017 | /* If the face of this glyph string has to be drawn to the end of | |
17018 | the drawing area, set S->extends_to_end_of_line_p. */ | |
17019 | struct face *default_face = FACE_FROM_ID (s->f, DEFAULT_FACE_ID); | |
17020 | ||
17021 | if (start == s->row->used[s->area] | |
17022 | && s->area == TEXT_AREA | |
17023 | && ((s->hl == DRAW_NORMAL_TEXT | |
17024 | && (s->row->fill_line_p | |
17025 | || s->face->background != default_face->background | |
17026 | || s->face->stipple != default_face->stipple | |
17027 | || s->row->mouse_face_p)) | |
17028 | || s->hl == DRAW_MOUSE_FACE | |
17029 | || ((s->hl == DRAW_IMAGE_RAISED || s->hl == DRAW_IMAGE_SUNKEN) | |
17030 | && s->row->fill_line_p))) | |
17031 | s->extends_to_end_of_line_p = 1; | |
17032 | ||
17033 | /* If S extends its face to the end of the line, set its | |
17034 | background_width to the distance to the right edge of the drawing | |
17035 | area. */ | |
17036 | if (s->extends_to_end_of_line_p) | |
17037 | s->background_width = last_x - s->x + 1; | |
17038 | else | |
17039 | s->background_width = s->width; | |
17040 | } | |
17041 | ||
17042 | ||
17043 | /* Compute overhangs and x-positions for glyph string S and its | |
17044 | predecessors, or successors. X is the starting x-position for S. | |
17045 | BACKWARD_P non-zero means process predecessors. */ | |
17046 | ||
17047 | static void | |
17048 | compute_overhangs_and_x (s, x, backward_p) | |
17049 | struct glyph_string *s; | |
17050 | int x; | |
17051 | int backward_p; | |
17052 | { | |
17053 | if (backward_p) | |
17054 | { | |
17055 | while (s) | |
17056 | { | |
17057 | if (rif->compute_glyph_string_overhangs) | |
17058 | rif->compute_glyph_string_overhangs (s); | |
17059 | x -= s->width; | |
17060 | s->x = x; | |
17061 | s = s->prev; | |
17062 | } | |
17063 | } | |
17064 | else | |
17065 | { | |
17066 | while (s) | |
17067 | { | |
17068 | if (rif->compute_glyph_string_overhangs) | |
17069 | rif->compute_glyph_string_overhangs (s); | |
17070 | s->x = x; | |
17071 | x += s->width; | |
17072 | s = s->next; | |
17073 | } | |
17074 | } | |
17075 | } | |
17076 | ||
17077 | ||
17078 | ||
fa3c6b4d | 17079 | /* The following macros are only called from draw_glyphs below. |
133c764e KS |
17080 | They reference the following parameters of that function directly: |
17081 | `w', `row', `area', and `overlap_p' | |
17082 | as well as the following local variables: | |
17083 | `s', `f', and `hdc' (in W32) */ | |
17084 | ||
17085 | #ifdef HAVE_NTGUI | |
17086 | /* On W32, silently add local `hdc' variable to argument list of | |
17087 | init_glyph_string. */ | |
17088 | #define INIT_GLYPH_STRING(s, char2b, w, row, area, start, hl) \ | |
17089 | init_glyph_string (s, hdc, char2b, w, row, area, start, hl) | |
17090 | #else | |
17091 | #define INIT_GLYPH_STRING(s, char2b, w, row, area, start, hl) \ | |
17092 | init_glyph_string (s, char2b, w, row, area, start, hl) | |
17093 | #endif | |
17094 | ||
17095 | /* Add a glyph string for a stretch glyph to the list of strings | |
17096 | between HEAD and TAIL. START is the index of the stretch glyph in | |
17097 | row area AREA of glyph row ROW. END is the index of the last glyph | |
17098 | in that glyph row area. X is the current output position assigned | |
17099 | to the new glyph string constructed. HL overrides that face of the | |
17100 | glyph; e.g. it is DRAW_CURSOR if a cursor has to be drawn. LAST_X | |
17101 | is the right-most x-position of the drawing area. */ | |
17102 | ||
17103 | /* SunOS 4 bundled cc, barfed on continuations in the arg lists here | |
17104 | and below -- keep them on one line. */ | |
17105 | #define BUILD_STRETCH_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
17106 | do \ | |
17107 | { \ | |
17108 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
17109 | INIT_GLYPH_STRING (s, NULL, w, row, area, START, HL); \ | |
17110 | START = fill_stretch_glyph_string (s, row, area, START, END); \ | |
17111 | append_glyph_string (&HEAD, &TAIL, s); \ | |
17112 | s->x = (X); \ | |
17113 | } \ | |
17114 | while (0) | |
17115 | ||
17116 | ||
17117 | /* Add a glyph string for an image glyph to the list of strings | |
17118 | between HEAD and TAIL. START is the index of the image glyph in | |
17119 | row area AREA of glyph row ROW. END is the index of the last glyph | |
17120 | in that glyph row area. X is the current output position assigned | |
17121 | to the new glyph string constructed. HL overrides that face of the | |
17122 | glyph; e.g. it is DRAW_CURSOR if a cursor has to be drawn. LAST_X | |
17123 | is the right-most x-position of the drawing area. */ | |
17124 | ||
17125 | #define BUILD_IMAGE_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
17126 | do \ | |
17127 | { \ | |
17128 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
17129 | INIT_GLYPH_STRING (s, NULL, w, row, area, START, HL); \ | |
17130 | fill_image_glyph_string (s); \ | |
17131 | append_glyph_string (&HEAD, &TAIL, s); \ | |
17132 | ++START; \ | |
17133 | s->x = (X); \ | |
17134 | } \ | |
17135 | while (0) | |
17136 | ||
17137 | ||
17138 | /* Add a glyph string for a sequence of character glyphs to the list | |
17139 | of strings between HEAD and TAIL. START is the index of the first | |
17140 | glyph in row area AREA of glyph row ROW that is part of the new | |
17141 | glyph string. END is the index of the last glyph in that glyph row | |
17142 | area. X is the current output position assigned to the new glyph | |
17143 | string constructed. HL overrides that face of the glyph; e.g. it | |
17144 | is DRAW_CURSOR if a cursor has to be drawn. LAST_X is the | |
17145 | right-most x-position of the drawing area. */ | |
17146 | ||
17147 | #define BUILD_CHAR_GLYPH_STRINGS(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
17148 | do \ | |
17149 | { \ | |
17150 | int c, face_id; \ | |
17151 | XChar2b *char2b; \ | |
17152 | \ | |
17153 | c = (row)->glyphs[area][START].u.ch; \ | |
17154 | face_id = (row)->glyphs[area][START].face_id; \ | |
17155 | \ | |
17156 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
17157 | char2b = (XChar2b *) alloca ((END - START) * sizeof *char2b); \ | |
17158 | INIT_GLYPH_STRING (s, char2b, w, row, area, START, HL); \ | |
17159 | append_glyph_string (&HEAD, &TAIL, s); \ | |
17160 | s->x = (X); \ | |
17161 | START = fill_glyph_string (s, face_id, START, END, overlaps_p); \ | |
17162 | } \ | |
17163 | while (0) | |
17164 | ||
17165 | ||
17166 | /* Add a glyph string for a composite sequence to the list of strings | |
17167 | between HEAD and TAIL. START is the index of the first glyph in | |
17168 | row area AREA of glyph row ROW that is part of the new glyph | |
17169 | string. END is the index of the last glyph in that glyph row area. | |
17170 | X is the current output position assigned to the new glyph string | |
17171 | constructed. HL overrides that face of the glyph; e.g. it is | |
17172 | DRAW_CURSOR if a cursor has to be drawn. LAST_X is the right-most | |
17173 | x-position of the drawing area. */ | |
17174 | ||
17175 | #define BUILD_COMPOSITE_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
17176 | do { \ | |
17177 | int cmp_id = (row)->glyphs[area][START].u.cmp_id; \ | |
17178 | int face_id = (row)->glyphs[area][START].face_id; \ | |
17179 | struct face *base_face = FACE_FROM_ID (f, face_id); \ | |
17180 | struct composition *cmp = composition_table[cmp_id]; \ | |
17181 | int glyph_len = cmp->glyph_len; \ | |
17182 | XChar2b *char2b; \ | |
17183 | struct face **faces; \ | |
17184 | struct glyph_string *first_s = NULL; \ | |
17185 | int n; \ | |
17186 | \ | |
17187 | base_face = base_face->ascii_face; \ | |
17188 | char2b = (XChar2b *) alloca ((sizeof *char2b) * glyph_len); \ | |
17189 | faces = (struct face **) alloca ((sizeof *faces) * glyph_len); \ | |
17190 | /* At first, fill in `char2b' and `faces'. */ \ | |
17191 | for (n = 0; n < glyph_len; n++) \ | |
17192 | { \ | |
17193 | int c = COMPOSITION_GLYPH (cmp, n); \ | |
17194 | int this_face_id = FACE_FOR_CHAR (f, base_face, c); \ | |
17195 | faces[n] = FACE_FROM_ID (f, this_face_id); \ | |
17196 | get_char_face_and_encoding (f, c, this_face_id, \ | |
17197 | char2b + n, 1, 1); \ | |
17198 | } \ | |
17199 | \ | |
17200 | /* Make glyph_strings for each glyph sequence that is drawable by \ | |
17201 | the same face, and append them to HEAD/TAIL. */ \ | |
17202 | for (n = 0; n < cmp->glyph_len;) \ | |
17203 | { \ | |
17204 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
17205 | INIT_GLYPH_STRING (s, char2b + n, w, row, area, START, HL); \ | |
17206 | append_glyph_string (&(HEAD), &(TAIL), s); \ | |
17207 | s->cmp = cmp; \ | |
17208 | s->gidx = n; \ | |
17209 | s->x = (X); \ | |
17210 | \ | |
17211 | if (n == 0) \ | |
17212 | first_s = s; \ | |
17213 | \ | |
17214 | n = fill_composite_glyph_string (s, faces, overlaps_p); \ | |
17215 | } \ | |
17216 | \ | |
17217 | ++START; \ | |
17218 | s = first_s; \ | |
17219 | } while (0) | |
17220 | ||
17221 | ||
17222 | /* Build a list of glyph strings between HEAD and TAIL for the glyphs | |
17223 | of AREA of glyph row ROW on window W between indices START and END. | |
17224 | HL overrides the face for drawing glyph strings, e.g. it is | |
17225 | DRAW_CURSOR to draw a cursor. X and LAST_X are start and end | |
17226 | x-positions of the drawing area. | |
17227 | ||
17228 | This is an ugly monster macro construct because we must use alloca | |
fa3c6b4d | 17229 | to allocate glyph strings (because draw_glyphs can be called |
133c764e KS |
17230 | asynchronously). */ |
17231 | ||
17232 | #define BUILD_GLYPH_STRINGS(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
17233 | do \ | |
17234 | { \ | |
17235 | HEAD = TAIL = NULL; \ | |
17236 | while (START < END) \ | |
17237 | { \ | |
17238 | struct glyph *first_glyph = (row)->glyphs[area] + START; \ | |
17239 | switch (first_glyph->type) \ | |
17240 | { \ | |
17241 | case CHAR_GLYPH: \ | |
17242 | BUILD_CHAR_GLYPH_STRINGS (START, END, HEAD, TAIL, \ | |
17243 | HL, X, LAST_X); \ | |
17244 | break; \ | |
17245 | \ | |
17246 | case COMPOSITE_GLYPH: \ | |
17247 | BUILD_COMPOSITE_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
17248 | HL, X, LAST_X); \ | |
17249 | break; \ | |
17250 | \ | |
17251 | case STRETCH_GLYPH: \ | |
17252 | BUILD_STRETCH_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
17253 | HL, X, LAST_X); \ | |
17254 | break; \ | |
17255 | \ | |
17256 | case IMAGE_GLYPH: \ | |
17257 | BUILD_IMAGE_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
17258 | HL, X, LAST_X); \ | |
17259 | break; \ | |
17260 | \ | |
17261 | default: \ | |
17262 | abort (); \ | |
17263 | } \ | |
17264 | \ | |
17265 | set_glyph_string_background_width (s, START, LAST_X); \ | |
17266 | (X) += s->width; \ | |
17267 | } \ | |
17268 | } \ | |
17269 | while (0) | |
17270 | ||
17271 | ||
17272 | /* Draw glyphs between START and END in AREA of ROW on window W, | |
17273 | starting at x-position X. X is relative to AREA in W. HL is a | |
17274 | face-override with the following meaning: | |
17275 | ||
17276 | DRAW_NORMAL_TEXT draw normally | |
17277 | DRAW_CURSOR draw in cursor face | |
17278 | DRAW_MOUSE_FACE draw in mouse face. | |
17279 | DRAW_INVERSE_VIDEO draw in mode line face | |
17280 | DRAW_IMAGE_SUNKEN draw an image with a sunken relief around it | |
17281 | DRAW_IMAGE_RAISED draw an image with a raised relief around it | |
17282 | ||
17283 | If OVERLAPS_P is non-zero, draw only the foreground of characters | |
17284 | and clip to the physical height of ROW. | |
17285 | ||
17286 | Value is the x-position reached, relative to AREA of W. */ | |
17287 | ||
fa3c6b4d KS |
17288 | static int |
17289 | draw_glyphs (w, x, row, area, start, end, hl, overlaps_p) | |
133c764e KS |
17290 | struct window *w; |
17291 | int x; | |
17292 | struct glyph_row *row; | |
17293 | enum glyph_row_area area; | |
17294 | int start, end; | |
17295 | enum draw_glyphs_face hl; | |
17296 | int overlaps_p; | |
17297 | { | |
17298 | struct glyph_string *head, *tail; | |
17299 | struct glyph_string *s; | |
17300 | int last_x, area_width; | |
17301 | int x_reached; | |
17302 | int i, j; | |
17303 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
17304 | DECLARE_HDC (hdc); | |
17305 | ||
17306 | ALLOCATE_HDC (hdc, f); | |
17307 | ||
17308 | /* Let's rather be paranoid than getting a SEGV. */ | |
17309 | end = min (end, row->used[area]); | |
17310 | start = max (0, start); | |
17311 | start = min (end, start); | |
17312 | ||
17313 | /* Translate X to frame coordinates. Set last_x to the right | |
17314 | end of the drawing area. */ | |
17315 | if (row->full_width_p) | |
17316 | { | |
17317 | /* X is relative to the left edge of W, without scroll bars | |
17318 | or fringes. */ | |
da8b7f4f KS |
17319 | x += WINDOW_LEFT_EDGE_X (w); |
17320 | last_x = WINDOW_LEFT_EDGE_X (w) + WINDOW_TOTAL_WIDTH (w); | |
133c764e KS |
17321 | } |
17322 | else | |
17323 | { | |
da8b7f4f KS |
17324 | int area_left = window_box_left (w, area); |
17325 | x += area_left; | |
133c764e | 17326 | area_width = window_box_width (w, area); |
da8b7f4f | 17327 | last_x = area_left + area_width; |
133c764e KS |
17328 | } |
17329 | ||
17330 | /* Build a doubly-linked list of glyph_string structures between | |
17331 | head and tail from what we have to draw. Note that the macro | |
17332 | BUILD_GLYPH_STRINGS will modify its start parameter. That's | |
17333 | the reason we use a separate variable `i'. */ | |
17334 | i = start; | |
17335 | BUILD_GLYPH_STRINGS (i, end, head, tail, hl, x, last_x); | |
17336 | if (tail) | |
17337 | x_reached = tail->x + tail->background_width; | |
17338 | else | |
17339 | x_reached = x; | |
17340 | ||
17341 | /* If there are any glyphs with lbearing < 0 or rbearing > width in | |
17342 | the row, redraw some glyphs in front or following the glyph | |
17343 | strings built above. */ | |
17344 | if (head && !overlaps_p && row->contains_overlapping_glyphs_p) | |
17345 | { | |
17346 | int dummy_x = 0; | |
17347 | struct glyph_string *h, *t; | |
17348 | ||
17349 | /* Compute overhangs for all glyph strings. */ | |
17350 | if (rif->compute_glyph_string_overhangs) | |
17351 | for (s = head; s; s = s->next) | |
17352 | rif->compute_glyph_string_overhangs (s); | |
17353 | ||
17354 | /* Prepend glyph strings for glyphs in front of the first glyph | |
17355 | string that are overwritten because of the first glyph | |
17356 | string's left overhang. The background of all strings | |
17357 | prepended must be drawn because the first glyph string | |
17358 | draws over it. */ | |
17359 | i = left_overwritten (head); | |
17360 | if (i >= 0) | |
17361 | { | |
17362 | j = i; | |
17363 | BUILD_GLYPH_STRINGS (j, start, h, t, | |
17364 | DRAW_NORMAL_TEXT, dummy_x, last_x); | |
17365 | start = i; | |
17366 | compute_overhangs_and_x (t, head->x, 1); | |
17367 | prepend_glyph_string_lists (&head, &tail, h, t); | |
17368 | } | |
17369 | ||
17370 | /* Prepend glyph strings for glyphs in front of the first glyph | |
17371 | string that overwrite that glyph string because of their | |
17372 | right overhang. For these strings, only the foreground must | |
17373 | be drawn, because it draws over the glyph string at `head'. | |
17374 | The background must not be drawn because this would overwrite | |
17375 | right overhangs of preceding glyphs for which no glyph | |
17376 | strings exist. */ | |
17377 | i = left_overwriting (head); | |
17378 | if (i >= 0) | |
17379 | { | |
17380 | BUILD_GLYPH_STRINGS (i, start, h, t, | |
17381 | DRAW_NORMAL_TEXT, dummy_x, last_x); | |
17382 | for (s = h; s; s = s->next) | |
17383 | s->background_filled_p = 1; | |
17384 | compute_overhangs_and_x (t, head->x, 1); | |
17385 | prepend_glyph_string_lists (&head, &tail, h, t); | |
17386 | } | |
17387 | ||
17388 | /* Append glyphs strings for glyphs following the last glyph | |
17389 | string tail that are overwritten by tail. The background of | |
17390 | these strings has to be drawn because tail's foreground draws | |
17391 | over it. */ | |
17392 | i = right_overwritten (tail); | |
17393 | if (i >= 0) | |
17394 | { | |
17395 | BUILD_GLYPH_STRINGS (end, i, h, t, | |
17396 | DRAW_NORMAL_TEXT, x, last_x); | |
17397 | compute_overhangs_and_x (h, tail->x + tail->width, 0); | |
17398 | append_glyph_string_lists (&head, &tail, h, t); | |
17399 | } | |
17400 | ||
17401 | /* Append glyph strings for glyphs following the last glyph | |
17402 | string tail that overwrite tail. The foreground of such | |
17403 | glyphs has to be drawn because it writes into the background | |
17404 | of tail. The background must not be drawn because it could | |
17405 | paint over the foreground of following glyphs. */ | |
17406 | i = right_overwriting (tail); | |
17407 | if (i >= 0) | |
17408 | { | |
17409 | BUILD_GLYPH_STRINGS (end, i, h, t, | |
17410 | DRAW_NORMAL_TEXT, x, last_x); | |
17411 | for (s = h; s; s = s->next) | |
17412 | s->background_filled_p = 1; | |
17413 | compute_overhangs_and_x (h, tail->x + tail->width, 0); | |
17414 | append_glyph_string_lists (&head, &tail, h, t); | |
17415 | } | |
17416 | } | |
17417 | ||
17418 | /* Draw all strings. */ | |
17419 | for (s = head; s; s = s->next) | |
17420 | rif->draw_glyph_string (s); | |
17421 | ||
17422 | if (area == TEXT_AREA | |
17423 | && !row->full_width_p | |
17424 | /* When drawing overlapping rows, only the glyph strings' | |
17425 | foreground is drawn, which doesn't erase a cursor | |
17426 | completely. */ | |
17427 | && !overlaps_p) | |
17428 | { | |
17429 | int x0 = head ? head->x : x; | |
17430 | int x1 = tail ? tail->x + tail->background_width : x; | |
17431 | ||
da8b7f4f KS |
17432 | int text_left = window_box_left (w, TEXT_AREA); |
17433 | x0 -= text_left; | |
17434 | x1 -= text_left; | |
133c764e | 17435 | |
da8b7f4f | 17436 | notice_overwritten_cursor (w, TEXT_AREA, x0, x1, |
133c764e KS |
17437 | row->y, MATRIX_ROW_BOTTOM_Y (row)); |
17438 | } | |
17439 | ||
17440 | /* Value is the x-position up to which drawn, relative to AREA of W. | |
17441 | This doesn't include parts drawn because of overhangs. */ | |
da8b7f4f KS |
17442 | if (row->full_width_p) |
17443 | x_reached = FRAME_TO_WINDOW_PIXEL_X (w, x_reached); | |
17444 | else | |
17445 | x_reached -= window_box_left (w, area); | |
133c764e KS |
17446 | |
17447 | RELEASE_HDC (hdc, f); | |
17448 | ||
17449 | return x_reached; | |
17450 | } | |
17451 | ||
17452 | ||
17453 | /* Store one glyph for IT->char_to_display in IT->glyph_row. | |
17454 | Called from x_produce_glyphs when IT->glyph_row is non-null. */ | |
17455 | ||
17456 | static INLINE void | |
17457 | append_glyph (it) | |
17458 | struct it *it; | |
17459 | { | |
17460 | struct glyph *glyph; | |
17461 | enum glyph_row_area area = it->area; | |
17462 | ||
17463 | xassert (it->glyph_row); | |
17464 | xassert (it->char_to_display != '\n' && it->char_to_display != '\t'); | |
17465 | ||
17466 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
17467 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
17468 | { | |
17469 | glyph->charpos = CHARPOS (it->position); | |
17470 | glyph->object = it->object; | |
17471 | glyph->pixel_width = it->pixel_width; | |
17472 | glyph->voffset = it->voffset; | |
17473 | glyph->type = CHAR_GLYPH; | |
17474 | glyph->multibyte_p = it->multibyte_p; | |
17475 | glyph->left_box_line_p = it->start_of_box_run_p; | |
17476 | glyph->right_box_line_p = it->end_of_box_run_p; | |
17477 | glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent | |
17478 | || it->phys_descent > it->descent); | |
17479 | glyph->padding_p = 0; | |
17480 | glyph->glyph_not_available_p = it->glyph_not_available_p; | |
17481 | glyph->face_id = it->face_id; | |
17482 | glyph->u.ch = it->char_to_display; | |
17483 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
17484 | ++it->glyph_row->used[area]; | |
17485 | } | |
17486 | } | |
17487 | ||
17488 | /* Store one glyph for the composition IT->cmp_id in IT->glyph_row. | |
17489 | Called from x_produce_glyphs when IT->glyph_row is non-null. */ | |
17490 | ||
17491 | static INLINE void | |
17492 | append_composite_glyph (it) | |
17493 | struct it *it; | |
17494 | { | |
17495 | struct glyph *glyph; | |
17496 | enum glyph_row_area area = it->area; | |
17497 | ||
17498 | xassert (it->glyph_row); | |
17499 | ||
17500 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
17501 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
17502 | { | |
17503 | glyph->charpos = CHARPOS (it->position); | |
17504 | glyph->object = it->object; | |
17505 | glyph->pixel_width = it->pixel_width; | |
17506 | glyph->voffset = it->voffset; | |
17507 | glyph->type = COMPOSITE_GLYPH; | |
17508 | glyph->multibyte_p = it->multibyte_p; | |
17509 | glyph->left_box_line_p = it->start_of_box_run_p; | |
17510 | glyph->right_box_line_p = it->end_of_box_run_p; | |
17511 | glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent | |
17512 | || it->phys_descent > it->descent); | |
17513 | glyph->padding_p = 0; | |
17514 | glyph->glyph_not_available_p = 0; | |
17515 | glyph->face_id = it->face_id; | |
17516 | glyph->u.cmp_id = it->cmp_id; | |
17517 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
17518 | ++it->glyph_row->used[area]; | |
17519 | } | |
17520 | } | |
17521 | ||
17522 | ||
17523 | /* Change IT->ascent and IT->height according to the setting of | |
17524 | IT->voffset. */ | |
17525 | ||
17526 | static INLINE void | |
17527 | take_vertical_position_into_account (it) | |
17528 | struct it *it; | |
17529 | { | |
17530 | if (it->voffset) | |
17531 | { | |
17532 | if (it->voffset < 0) | |
17533 | /* Increase the ascent so that we can display the text higher | |
17534 | in the line. */ | |
17535 | it->ascent += abs (it->voffset); | |
17536 | else | |
17537 | /* Increase the descent so that we can display the text lower | |
17538 | in the line. */ | |
17539 | it->descent += it->voffset; | |
17540 | } | |
17541 | } | |
17542 | ||
17543 | ||
17544 | /* Produce glyphs/get display metrics for the image IT is loaded with. | |
17545 | See the description of struct display_iterator in dispextern.h for | |
17546 | an overview of struct display_iterator. */ | |
17547 | ||
17548 | static void | |
17549 | produce_image_glyph (it) | |
17550 | struct it *it; | |
17551 | { | |
17552 | struct image *img; | |
17553 | struct face *face; | |
17554 | ||
17555 | xassert (it->what == IT_IMAGE); | |
17556 | ||
17557 | face = FACE_FROM_ID (it->f, it->face_id); | |
17558 | img = IMAGE_FROM_ID (it->f, it->image_id); | |
17559 | xassert (img); | |
17560 | ||
17561 | /* Make sure X resources of the face and image are loaded. */ | |
17562 | PREPARE_FACE_FOR_DISPLAY (it->f, face); | |
17563 | prepare_image_for_display (it->f, img); | |
17564 | ||
17565 | it->ascent = it->phys_ascent = image_ascent (img, face); | |
17566 | it->descent = it->phys_descent = img->height + 2 * img->vmargin - it->ascent; | |
17567 | it->pixel_width = img->width + 2 * img->hmargin; | |
17568 | ||
17569 | it->nglyphs = 1; | |
17570 | ||
17571 | if (face->box != FACE_NO_BOX) | |
17572 | { | |
17573 | if (face->box_line_width > 0) | |
17574 | { | |
17575 | it->ascent += face->box_line_width; | |
17576 | it->descent += face->box_line_width; | |
17577 | } | |
17578 | ||
17579 | if (it->start_of_box_run_p) | |
17580 | it->pixel_width += abs (face->box_line_width); | |
17581 | if (it->end_of_box_run_p) | |
17582 | it->pixel_width += abs (face->box_line_width); | |
17583 | } | |
17584 | ||
17585 | take_vertical_position_into_account (it); | |
17586 | ||
17587 | if (it->glyph_row) | |
17588 | { | |
17589 | struct glyph *glyph; | |
17590 | enum glyph_row_area area = it->area; | |
17591 | ||
17592 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
17593 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
17594 | { | |
17595 | glyph->charpos = CHARPOS (it->position); | |
17596 | glyph->object = it->object; | |
17597 | glyph->pixel_width = it->pixel_width; | |
17598 | glyph->voffset = it->voffset; | |
17599 | glyph->type = IMAGE_GLYPH; | |
17600 | glyph->multibyte_p = it->multibyte_p; | |
17601 | glyph->left_box_line_p = it->start_of_box_run_p; | |
17602 | glyph->right_box_line_p = it->end_of_box_run_p; | |
17603 | glyph->overlaps_vertically_p = 0; | |
17604 | glyph->padding_p = 0; | |
17605 | glyph->glyph_not_available_p = 0; | |
17606 | glyph->face_id = it->face_id; | |
17607 | glyph->u.img_id = img->id; | |
17608 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
17609 | ++it->glyph_row->used[area]; | |
17610 | } | |
17611 | } | |
17612 | } | |
17613 | ||
17614 | ||
17615 | /* Append a stretch glyph to IT->glyph_row. OBJECT is the source | |
17616 | of the glyph, WIDTH and HEIGHT are the width and height of the | |
17617 | stretch. ASCENT is the percentage/100 of HEIGHT to use for the | |
17618 | ascent of the glyph (0 <= ASCENT <= 1). */ | |
17619 | ||
17620 | static void | |
17621 | append_stretch_glyph (it, object, width, height, ascent) | |
17622 | struct it *it; | |
17623 | Lisp_Object object; | |
17624 | int width, height; | |
17625 | double ascent; | |
17626 | { | |
17627 | struct glyph *glyph; | |
17628 | enum glyph_row_area area = it->area; | |
17629 | ||
17630 | xassert (ascent >= 0 && ascent <= 1); | |
17631 | ||
17632 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
17633 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
17634 | { | |
17635 | glyph->charpos = CHARPOS (it->position); | |
17636 | glyph->object = object; | |
17637 | glyph->pixel_width = width; | |
17638 | glyph->voffset = it->voffset; | |
17639 | glyph->type = STRETCH_GLYPH; | |
17640 | glyph->multibyte_p = it->multibyte_p; | |
17641 | glyph->left_box_line_p = it->start_of_box_run_p; | |
17642 | glyph->right_box_line_p = it->end_of_box_run_p; | |
17643 | glyph->overlaps_vertically_p = 0; | |
17644 | glyph->padding_p = 0; | |
17645 | glyph->glyph_not_available_p = 0; | |
17646 | glyph->face_id = it->face_id; | |
17647 | glyph->u.stretch.ascent = height * ascent; | |
17648 | glyph->u.stretch.height = height; | |
17649 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
17650 | ++it->glyph_row->used[area]; | |
17651 | } | |
17652 | } | |
17653 | ||
17654 | ||
17655 | /* Produce a stretch glyph for iterator IT. IT->object is the value | |
17656 | of the glyph property displayed. The value must be a list | |
17657 | `(space KEYWORD VALUE ...)' with the following KEYWORD/VALUE pairs | |
17658 | being recognized: | |
17659 | ||
17660 | 1. `:width WIDTH' specifies that the space should be WIDTH * | |
17661 | canonical char width wide. WIDTH may be an integer or floating | |
17662 | point number. | |
17663 | ||
17664 | 2. `:relative-width FACTOR' specifies that the width of the stretch | |
17665 | should be computed from the width of the first character having the | |
17666 | `glyph' property, and should be FACTOR times that width. | |
17667 | ||
17668 | 3. `:align-to HPOS' specifies that the space should be wide enough | |
17669 | to reach HPOS, a value in canonical character units. | |
17670 | ||
17671 | Exactly one of the above pairs must be present. | |
17672 | ||
17673 | 4. `:height HEIGHT' specifies that the height of the stretch produced | |
17674 | should be HEIGHT, measured in canonical character units. | |
17675 | ||
17676 | 5. `:relative-height FACTOR' specifies that the height of the | |
17677 | stretch should be FACTOR times the height of the characters having | |
17678 | the glyph property. | |
17679 | ||
17680 | Either none or exactly one of 4 or 5 must be present. | |
17681 | ||
17682 | 6. `:ascent ASCENT' specifies that ASCENT percent of the height | |
17683 | of the stretch should be used for the ascent of the stretch. | |
17684 | ASCENT must be in the range 0 <= ASCENT <= 100. */ | |
17685 | ||
17686 | #define NUMVAL(X) \ | |
17687 | ((INTEGERP (X) || FLOATP (X)) \ | |
17688 | ? XFLOATINT (X) \ | |
17689 | : - 1) | |
17690 | ||
17691 | ||
17692 | static void | |
17693 | produce_stretch_glyph (it) | |
17694 | struct it *it; | |
17695 | { | |
17696 | /* (space :width WIDTH :height HEIGHT. */ | |
17697 | Lisp_Object prop, plist; | |
17698 | int width = 0, height = 0; | |
17699 | double ascent = 0; | |
17700 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
17701 | XFontStruct *font = face->font ? face->font : FRAME_FONT (it->f); | |
17702 | ||
17703 | PREPARE_FACE_FOR_DISPLAY (it->f, face); | |
17704 | ||
17705 | /* List should start with `space'. */ | |
17706 | xassert (CONSP (it->object) && EQ (XCAR (it->object), Qspace)); | |
17707 | plist = XCDR (it->object); | |
17708 | ||
17709 | /* Compute the width of the stretch. */ | |
17710 | if (prop = Fplist_get (plist, QCwidth), | |
17711 | NUMVAL (prop) > 0) | |
17712 | /* Absolute width `:width WIDTH' specified and valid. */ | |
da8b7f4f | 17713 | width = NUMVAL (prop) * FRAME_COLUMN_WIDTH (it->f); |
133c764e KS |
17714 | else if (prop = Fplist_get (plist, QCrelative_width), |
17715 | NUMVAL (prop) > 0) | |
17716 | { | |
17717 | /* Relative width `:relative-width FACTOR' specified and valid. | |
17718 | Compute the width of the characters having the `glyph' | |
17719 | property. */ | |
17720 | struct it it2; | |
17721 | unsigned char *p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
17722 | ||
17723 | it2 = *it; | |
17724 | if (it->multibyte_p) | |
17725 | { | |
17726 | int maxlen = ((IT_BYTEPOS (*it) >= GPT ? ZV : GPT) | |
17727 | - IT_BYTEPOS (*it)); | |
17728 | it2.c = STRING_CHAR_AND_LENGTH (p, maxlen, it2.len); | |
17729 | } | |
17730 | else | |
17731 | it2.c = *p, it2.len = 1; | |
17732 | ||
17733 | it2.glyph_row = NULL; | |
17734 | it2.what = IT_CHARACTER; | |
17735 | x_produce_glyphs (&it2); | |
17736 | width = NUMVAL (prop) * it2.pixel_width; | |
17737 | } | |
17738 | else if (prop = Fplist_get (plist, QCalign_to), | |
17739 | NUMVAL (prop) > 0) | |
da8b7f4f | 17740 | width = NUMVAL (prop) * FRAME_COLUMN_WIDTH (it->f) - it->current_x; |
133c764e KS |
17741 | else |
17742 | /* Nothing specified -> width defaults to canonical char width. */ | |
da8b7f4f | 17743 | width = FRAME_COLUMN_WIDTH (it->f); |
133c764e KS |
17744 | |
17745 | /* Compute height. */ | |
17746 | if (prop = Fplist_get (plist, QCheight), | |
17747 | NUMVAL (prop) > 0) | |
da8b7f4f | 17748 | height = NUMVAL (prop) * FRAME_LINE_HEIGHT (it->f); |
133c764e KS |
17749 | else if (prop = Fplist_get (plist, QCrelative_height), |
17750 | NUMVAL (prop) > 0) | |
17751 | height = FONT_HEIGHT (font) * NUMVAL (prop); | |
17752 | else | |
17753 | height = FONT_HEIGHT (font); | |
17754 | ||
17755 | /* Compute percentage of height used for ascent. If | |
17756 | `:ascent ASCENT' is present and valid, use that. Otherwise, | |
17757 | derive the ascent from the font in use. */ | |
17758 | if (prop = Fplist_get (plist, QCascent), | |
17759 | NUMVAL (prop) > 0 && NUMVAL (prop) <= 100) | |
17760 | ascent = NUMVAL (prop) / 100.0; | |
17761 | else | |
17762 | ascent = (double) FONT_BASE (font) / FONT_HEIGHT (font); | |
17763 | ||
17764 | if (width <= 0) | |
17765 | width = 1; | |
17766 | if (height <= 0) | |
17767 | height = 1; | |
17768 | ||
17769 | if (it->glyph_row) | |
17770 | { | |
17771 | Lisp_Object object = it->stack[it->sp - 1].string; | |
17772 | if (!STRINGP (object)) | |
17773 | object = it->w->buffer; | |
17774 | append_stretch_glyph (it, object, width, height, ascent); | |
17775 | } | |
17776 | ||
17777 | it->pixel_width = width; | |
17778 | it->ascent = it->phys_ascent = height * ascent; | |
17779 | it->descent = it->phys_descent = height - it->ascent; | |
17780 | it->nglyphs = 1; | |
17781 | ||
17782 | if (face->box != FACE_NO_BOX) | |
17783 | { | |
17784 | if (face->box_line_width > 0) | |
17785 | { | |
17786 | it->ascent += face->box_line_width; | |
17787 | it->descent += face->box_line_width; | |
17788 | } | |
17789 | ||
17790 | if (it->start_of_box_run_p) | |
17791 | it->pixel_width += abs (face->box_line_width); | |
17792 | if (it->end_of_box_run_p) | |
17793 | it->pixel_width += abs (face->box_line_width); | |
17794 | } | |
17795 | ||
17796 | take_vertical_position_into_account (it); | |
17797 | } | |
17798 | ||
17799 | /* RIF: | |
17800 | Produce glyphs/get display metrics for the display element IT is | |
17801 | loaded with. See the description of struct display_iterator in | |
17802 | dispextern.h for an overview of struct display_iterator. */ | |
17803 | ||
17804 | void | |
17805 | x_produce_glyphs (it) | |
17806 | struct it *it; | |
17807 | { | |
17808 | it->glyph_not_available_p = 0; | |
17809 | ||
17810 | if (it->what == IT_CHARACTER) | |
17811 | { | |
17812 | XChar2b char2b; | |
17813 | XFontStruct *font; | |
17814 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
17815 | XCharStruct *pcm; | |
17816 | int font_not_found_p; | |
17817 | struct font_info *font_info; | |
17818 | int boff; /* baseline offset */ | |
17819 | /* We may change it->multibyte_p upon unibyte<->multibyte | |
17820 | conversion. So, save the current value now and restore it | |
17821 | later. | |
17822 | ||
17823 | Note: It seems that we don't have to record multibyte_p in | |
17824 | struct glyph because the character code itself tells if or | |
17825 | not the character is multibyte. Thus, in the future, we must | |
17826 | consider eliminating the field `multibyte_p' in the struct | |
17827 | glyph. */ | |
17828 | int saved_multibyte_p = it->multibyte_p; | |
17829 | ||
17830 | /* Maybe translate single-byte characters to multibyte, or the | |
17831 | other way. */ | |
17832 | it->char_to_display = it->c; | |
17833 | if (!ASCII_BYTE_P (it->c)) | |
17834 | { | |
17835 | if (unibyte_display_via_language_environment | |
17836 | && SINGLE_BYTE_CHAR_P (it->c) | |
17837 | && (it->c >= 0240 | |
17838 | || !NILP (Vnonascii_translation_table))) | |
17839 | { | |
17840 | it->char_to_display = unibyte_char_to_multibyte (it->c); | |
17841 | it->multibyte_p = 1; | |
17842 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
17843 | face = FACE_FROM_ID (it->f, it->face_id); | |
17844 | } | |
17845 | else if (!SINGLE_BYTE_CHAR_P (it->c) | |
17846 | && !it->multibyte_p) | |
17847 | { | |
17848 | it->multibyte_p = 1; | |
17849 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
17850 | face = FACE_FROM_ID (it->f, it->face_id); | |
17851 | } | |
17852 | } | |
17853 | ||
17854 | /* Get font to use. Encode IT->char_to_display. */ | |
17855 | get_char_face_and_encoding (it->f, it->char_to_display, it->face_id, | |
17856 | &char2b, it->multibyte_p, 0); | |
17857 | font = face->font; | |
17858 | ||
17859 | /* When no suitable font found, use the default font. */ | |
17860 | font_not_found_p = font == NULL; | |
17861 | if (font_not_found_p) | |
17862 | { | |
17863 | font = FRAME_FONT (it->f); | |
17864 | boff = FRAME_BASELINE_OFFSET (it->f); | |
17865 | font_info = NULL; | |
17866 | } | |
17867 | else | |
17868 | { | |
17869 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
17870 | boff = font_info->baseline_offset; | |
17871 | if (font_info->vertical_centering) | |
17872 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
17873 | } | |
17874 | ||
17875 | if (it->char_to_display >= ' ' | |
17876 | && (!it->multibyte_p || it->char_to_display < 128)) | |
17877 | { | |
17878 | /* Either unibyte or ASCII. */ | |
17879 | int stretched_p; | |
17880 | ||
17881 | it->nglyphs = 1; | |
17882 | ||
17883 | pcm = rif->per_char_metric (font, &char2b, | |
17884 | FONT_TYPE_FOR_UNIBYTE (font, it->char_to_display)); | |
17885 | it->ascent = FONT_BASE (font) + boff; | |
17886 | it->descent = FONT_DESCENT (font) - boff; | |
17887 | ||
17888 | if (pcm) | |
17889 | { | |
17890 | it->phys_ascent = pcm->ascent + boff; | |
17891 | it->phys_descent = pcm->descent - boff; | |
17892 | it->pixel_width = pcm->width; | |
17893 | } | |
17894 | else | |
17895 | { | |
17896 | it->glyph_not_available_p = 1; | |
17897 | it->phys_ascent = FONT_BASE (font) + boff; | |
17898 | it->phys_descent = FONT_DESCENT (font) - boff; | |
17899 | it->pixel_width = FONT_WIDTH (font); | |
17900 | } | |
17901 | ||
17902 | /* If this is a space inside a region of text with | |
17903 | `space-width' property, change its width. */ | |
17904 | stretched_p = it->char_to_display == ' ' && !NILP (it->space_width); | |
17905 | if (stretched_p) | |
17906 | it->pixel_width *= XFLOATINT (it->space_width); | |
17907 | ||
17908 | /* If face has a box, add the box thickness to the character | |
17909 | height. If character has a box line to the left and/or | |
17910 | right, add the box line width to the character's width. */ | |
17911 | if (face->box != FACE_NO_BOX) | |
17912 | { | |
17913 | int thick = face->box_line_width; | |
17914 | ||
17915 | if (thick > 0) | |
17916 | { | |
17917 | it->ascent += thick; | |
17918 | it->descent += thick; | |
17919 | } | |
17920 | else | |
17921 | thick = -thick; | |
17922 | ||
17923 | if (it->start_of_box_run_p) | |
17924 | it->pixel_width += thick; | |
17925 | if (it->end_of_box_run_p) | |
17926 | it->pixel_width += thick; | |
17927 | } | |
17928 | ||
17929 | /* If face has an overline, add the height of the overline | |
17930 | (1 pixel) and a 1 pixel margin to the character height. */ | |
17931 | if (face->overline_p) | |
17932 | it->ascent += 2; | |
17933 | ||
17934 | take_vertical_position_into_account (it); | |
17935 | ||
17936 | /* If we have to actually produce glyphs, do it. */ | |
17937 | if (it->glyph_row) | |
17938 | { | |
17939 | if (stretched_p) | |
17940 | { | |
17941 | /* Translate a space with a `space-width' property | |
17942 | into a stretch glyph. */ | |
17943 | double ascent = (double) FONT_BASE (font) | |
17944 | / FONT_HEIGHT (font); | |
17945 | append_stretch_glyph (it, it->object, it->pixel_width, | |
17946 | it->ascent + it->descent, ascent); | |
17947 | } | |
17948 | else | |
17949 | append_glyph (it); | |
17950 | ||
17951 | /* If characters with lbearing or rbearing are displayed | |
17952 | in this line, record that fact in a flag of the | |
17953 | glyph row. This is used to optimize X output code. */ | |
17954 | if (pcm && (pcm->lbearing < 0 || pcm->rbearing > pcm->width)) | |
17955 | it->glyph_row->contains_overlapping_glyphs_p = 1; | |
17956 | } | |
17957 | } | |
17958 | else if (it->char_to_display == '\n') | |
17959 | { | |
17960 | /* A newline has no width but we need the height of the line. */ | |
17961 | it->pixel_width = 0; | |
17962 | it->nglyphs = 0; | |
17963 | it->ascent = it->phys_ascent = FONT_BASE (font) + boff; | |
17964 | it->descent = it->phys_descent = FONT_DESCENT (font) - boff; | |
17965 | ||
17966 | if (face->box != FACE_NO_BOX | |
17967 | && face->box_line_width > 0) | |
17968 | { | |
17969 | it->ascent += face->box_line_width; | |
17970 | it->descent += face->box_line_width; | |
17971 | } | |
17972 | } | |
17973 | else if (it->char_to_display == '\t') | |
17974 | { | |
da8b7f4f | 17975 | int tab_width = it->tab_width * FRAME_COLUMN_WIDTH (it->f); |
133c764e KS |
17976 | int x = it->current_x + it->continuation_lines_width; |
17977 | int next_tab_x = ((1 + x + tab_width - 1) / tab_width) * tab_width; | |
17978 | ||
17979 | /* If the distance from the current position to the next tab | |
17980 | stop is less than a canonical character width, use the | |
17981 | tab stop after that. */ | |
da8b7f4f | 17982 | if (next_tab_x - x < FRAME_COLUMN_WIDTH (it->f)) |
133c764e KS |
17983 | next_tab_x += tab_width; |
17984 | ||
17985 | it->pixel_width = next_tab_x - x; | |
17986 | it->nglyphs = 1; | |
17987 | it->ascent = it->phys_ascent = FONT_BASE (font) + boff; | |
17988 | it->descent = it->phys_descent = FONT_DESCENT (font) - boff; | |
17989 | ||
17990 | if (it->glyph_row) | |
17991 | { | |
17992 | double ascent = (double) it->ascent / (it->ascent + it->descent); | |
17993 | append_stretch_glyph (it, it->object, it->pixel_width, | |
17994 | it->ascent + it->descent, ascent); | |
17995 | } | |
17996 | } | |
17997 | else | |
17998 | { | |
17999 | /* A multi-byte character. Assume that the display width of the | |
18000 | character is the width of the character multiplied by the | |
18001 | width of the font. */ | |
18002 | ||
18003 | /* If we found a font, this font should give us the right | |
18004 | metrics. If we didn't find a font, use the frame's | |
18005 | default font and calculate the width of the character | |
18006 | from the charset width; this is what old redisplay code | |
18007 | did. */ | |
18008 | ||
18009 | pcm = rif->per_char_metric (font, &char2b, | |
18010 | FONT_TYPE_FOR_MULTIBYTE (font, it->c)); | |
18011 | ||
18012 | if (font_not_found_p || !pcm) | |
18013 | { | |
18014 | int charset = CHAR_CHARSET (it->char_to_display); | |
18015 | ||
18016 | it->glyph_not_available_p = 1; | |
da8b7f4f | 18017 | it->pixel_width = (FRAME_COLUMN_WIDTH (it->f) |
133c764e KS |
18018 | * CHARSET_WIDTH (charset)); |
18019 | it->phys_ascent = FONT_BASE (font) + boff; | |
18020 | it->phys_descent = FONT_DESCENT (font) - boff; | |
18021 | } | |
18022 | else | |
18023 | { | |
18024 | it->pixel_width = pcm->width; | |
18025 | it->phys_ascent = pcm->ascent + boff; | |
18026 | it->phys_descent = pcm->descent - boff; | |
18027 | if (it->glyph_row | |
18028 | && (pcm->lbearing < 0 | |
18029 | || pcm->rbearing > pcm->width)) | |
18030 | it->glyph_row->contains_overlapping_glyphs_p = 1; | |
18031 | } | |
18032 | it->nglyphs = 1; | |
18033 | it->ascent = FONT_BASE (font) + boff; | |
18034 | it->descent = FONT_DESCENT (font) - boff; | |
18035 | if (face->box != FACE_NO_BOX) | |
18036 | { | |
18037 | int thick = face->box_line_width; | |
18038 | ||
18039 | if (thick > 0) | |
18040 | { | |
18041 | it->ascent += thick; | |
18042 | it->descent += thick; | |
18043 | } | |
18044 | else | |
18045 | thick = - thick; | |
18046 | ||
18047 | if (it->start_of_box_run_p) | |
18048 | it->pixel_width += thick; | |
18049 | if (it->end_of_box_run_p) | |
18050 | it->pixel_width += thick; | |
18051 | } | |
18052 | ||
18053 | /* If face has an overline, add the height of the overline | |
18054 | (1 pixel) and a 1 pixel margin to the character height. */ | |
18055 | if (face->overline_p) | |
18056 | it->ascent += 2; | |
18057 | ||
18058 | take_vertical_position_into_account (it); | |
18059 | ||
18060 | if (it->glyph_row) | |
18061 | append_glyph (it); | |
18062 | } | |
18063 | it->multibyte_p = saved_multibyte_p; | |
18064 | } | |
18065 | else if (it->what == IT_COMPOSITION) | |
18066 | { | |
18067 | /* Note: A composition is represented as one glyph in the | |
18068 | glyph matrix. There are no padding glyphs. */ | |
18069 | XChar2b char2b; | |
18070 | XFontStruct *font; | |
18071 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
18072 | XCharStruct *pcm; | |
18073 | int font_not_found_p; | |
18074 | struct font_info *font_info; | |
18075 | int boff; /* baseline offset */ | |
18076 | struct composition *cmp = composition_table[it->cmp_id]; | |
18077 | ||
18078 | /* Maybe translate single-byte characters to multibyte. */ | |
18079 | it->char_to_display = it->c; | |
18080 | if (unibyte_display_via_language_environment | |
18081 | && SINGLE_BYTE_CHAR_P (it->c) | |
18082 | && (it->c >= 0240 | |
18083 | || (it->c >= 0200 | |
18084 | && !NILP (Vnonascii_translation_table)))) | |
18085 | { | |
18086 | it->char_to_display = unibyte_char_to_multibyte (it->c); | |
18087 | } | |
18088 | ||
18089 | /* Get face and font to use. Encode IT->char_to_display. */ | |
18090 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
18091 | face = FACE_FROM_ID (it->f, it->face_id); | |
18092 | get_char_face_and_encoding (it->f, it->char_to_display, it->face_id, | |
18093 | &char2b, it->multibyte_p, 0); | |
18094 | font = face->font; | |
18095 | ||
18096 | /* When no suitable font found, use the default font. */ | |
18097 | font_not_found_p = font == NULL; | |
18098 | if (font_not_found_p) | |
18099 | { | |
18100 | font = FRAME_FONT (it->f); | |
18101 | boff = FRAME_BASELINE_OFFSET (it->f); | |
18102 | font_info = NULL; | |
18103 | } | |
18104 | else | |
18105 | { | |
18106 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
18107 | boff = font_info->baseline_offset; | |
18108 | if (font_info->vertical_centering) | |
18109 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
18110 | } | |
18111 | ||
18112 | /* There are no padding glyphs, so there is only one glyph to | |
18113 | produce for the composition. Important is that pixel_width, | |
18114 | ascent and descent are the values of what is drawn by | |
18115 | draw_glyphs (i.e. the values of the overall glyphs composed). */ | |
18116 | it->nglyphs = 1; | |
18117 | ||
18118 | /* If we have not yet calculated pixel size data of glyphs of | |
18119 | the composition for the current face font, calculate them | |
18120 | now. Theoretically, we have to check all fonts for the | |
18121 | glyphs, but that requires much time and memory space. So, | |
18122 | here we check only the font of the first glyph. This leads | |
18123 | to incorrect display very rarely, and C-l (recenter) can | |
18124 | correct the display anyway. */ | |
18125 | if (cmp->font != (void *) font) | |
18126 | { | |
18127 | /* Ascent and descent of the font of the first character of | |
18128 | this composition (adjusted by baseline offset). Ascent | |
18129 | and descent of overall glyphs should not be less than | |
18130 | them respectively. */ | |
18131 | int font_ascent = FONT_BASE (font) + boff; | |
18132 | int font_descent = FONT_DESCENT (font) - boff; | |
18133 | /* Bounding box of the overall glyphs. */ | |
18134 | int leftmost, rightmost, lowest, highest; | |
18135 | int i, width, ascent, descent; | |
18136 | ||
18137 | cmp->font = (void *) font; | |
18138 | ||
18139 | /* Initialize the bounding box. */ | |
18140 | if (font_info | |
18141 | && (pcm = rif->per_char_metric (font, &char2b, | |
18142 | FONT_TYPE_FOR_MULTIBYTE (font, it->c)))) | |
18143 | { | |
18144 | width = pcm->width; | |
18145 | ascent = pcm->ascent; | |
18146 | descent = pcm->descent; | |
18147 | } | |
18148 | else | |
18149 | { | |
18150 | width = FONT_WIDTH (font); | |
18151 | ascent = FONT_BASE (font); | |
18152 | descent = FONT_DESCENT (font); | |
18153 | } | |
18154 | ||
18155 | rightmost = width; | |
18156 | lowest = - descent + boff; | |
18157 | highest = ascent + boff; | |
18158 | leftmost = 0; | |
18159 | ||
18160 | if (font_info | |
18161 | && font_info->default_ascent | |
18162 | && CHAR_TABLE_P (Vuse_default_ascent) | |
18163 | && !NILP (Faref (Vuse_default_ascent, | |
18164 | make_number (it->char_to_display)))) | |
18165 | highest = font_info->default_ascent + boff; | |
18166 | ||
18167 | /* Draw the first glyph at the normal position. It may be | |
18168 | shifted to right later if some other glyphs are drawn at | |
18169 | the left. */ | |
18170 | cmp->offsets[0] = 0; | |
18171 | cmp->offsets[1] = boff; | |
18172 | ||
18173 | /* Set cmp->offsets for the remaining glyphs. */ | |
18174 | for (i = 1; i < cmp->glyph_len; i++) | |
18175 | { | |
18176 | int left, right, btm, top; | |
18177 | int ch = COMPOSITION_GLYPH (cmp, i); | |
18178 | int face_id = FACE_FOR_CHAR (it->f, face, ch); | |
18179 | ||
18180 | face = FACE_FROM_ID (it->f, face_id); | |
18181 | get_char_face_and_encoding (it->f, ch, face->id, | |
18182 | &char2b, it->multibyte_p, 0); | |
18183 | font = face->font; | |
18184 | if (font == NULL) | |
18185 | { | |
18186 | font = FRAME_FONT (it->f); | |
2a6d0874 | 18187 | boff = FRAME_BASELINE_OFFSET (it->f); |
133c764e KS |
18188 | font_info = NULL; |
18189 | } | |
18190 | else | |
18191 | { | |
18192 | font_info | |
18193 | = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
18194 | boff = font_info->baseline_offset; | |
18195 | if (font_info->vertical_centering) | |
18196 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
18197 | } | |
18198 | ||
18199 | if (font_info | |
2a6d0874 | 18200 | && (pcm = rif->per_char_metric (font, &char2b, |
133c764e KS |
18201 | FONT_TYPE_FOR_MULTIBYTE (font, ch)))) |
18202 | { | |
18203 | width = pcm->width; | |
18204 | ascent = pcm->ascent; | |
18205 | descent = pcm->descent; | |
18206 | } | |
18207 | else | |
18208 | { | |
18209 | width = FONT_WIDTH (font); | |
18210 | ascent = 1; | |
18211 | descent = 0; | |
18212 | } | |
18213 | ||
18214 | if (cmp->method != COMPOSITION_WITH_RULE_ALTCHARS) | |
18215 | { | |
18216 | /* Relative composition with or without | |
18217 | alternate chars. */ | |
18218 | left = (leftmost + rightmost - width) / 2; | |
18219 | btm = - descent + boff; | |
18220 | if (font_info && font_info->relative_compose | |
18221 | && (! CHAR_TABLE_P (Vignore_relative_composition) | |
18222 | || NILP (Faref (Vignore_relative_composition, | |
18223 | make_number (ch))))) | |
18224 | { | |
18225 | ||
18226 | if (- descent >= font_info->relative_compose) | |
18227 | /* One extra pixel between two glyphs. */ | |
18228 | btm = highest + 1; | |
18229 | else if (ascent <= 0) | |
18230 | /* One extra pixel between two glyphs. */ | |
18231 | btm = lowest - 1 - ascent - descent; | |
18232 | } | |
18233 | } | |
18234 | else | |
18235 | { | |
18236 | /* A composition rule is specified by an integer | |
18237 | value that encodes global and new reference | |
18238 | points (GREF and NREF). GREF and NREF are | |
18239 | specified by numbers as below: | |
18240 | ||
18241 | 0---1---2 -- ascent | |
18242 | | | | |
18243 | | | | |
18244 | | | | |
18245 | 9--10--11 -- center | |
18246 | | | | |
18247 | ---3---4---5--- baseline | |
18248 | | | | |
18249 | 6---7---8 -- descent | |
18250 | */ | |
18251 | int rule = COMPOSITION_RULE (cmp, i); | |
18252 | int gref, nref, grefx, grefy, nrefx, nrefy; | |
18253 | ||
18254 | COMPOSITION_DECODE_RULE (rule, gref, nref); | |
18255 | grefx = gref % 3, nrefx = nref % 3; | |
18256 | grefy = gref / 3, nrefy = nref / 3; | |
18257 | ||
18258 | left = (leftmost | |
18259 | + grefx * (rightmost - leftmost) / 2 | |
18260 | - nrefx * width / 2); | |
18261 | btm = ((grefy == 0 ? highest | |
18262 | : grefy == 1 ? 0 | |
18263 | : grefy == 2 ? lowest | |
18264 | : (highest + lowest) / 2) | |
18265 | - (nrefy == 0 ? ascent + descent | |
18266 | : nrefy == 1 ? descent - boff | |
18267 | : nrefy == 2 ? 0 | |
18268 | : (ascent + descent) / 2)); | |
18269 | } | |
18270 | ||
18271 | cmp->offsets[i * 2] = left; | |
18272 | cmp->offsets[i * 2 + 1] = btm + descent; | |
18273 | ||
18274 | /* Update the bounding box of the overall glyphs. */ | |
18275 | right = left + width; | |
18276 | top = btm + descent + ascent; | |
18277 | if (left < leftmost) | |
18278 | leftmost = left; | |
18279 | if (right > rightmost) | |
18280 | rightmost = right; | |
18281 | if (top > highest) | |
18282 | highest = top; | |
18283 | if (btm < lowest) | |
18284 | lowest = btm; | |
18285 | } | |
18286 | ||
18287 | /* If there are glyphs whose x-offsets are negative, | |
18288 | shift all glyphs to the right and make all x-offsets | |
18289 | non-negative. */ | |
18290 | if (leftmost < 0) | |
18291 | { | |
18292 | for (i = 0; i < cmp->glyph_len; i++) | |
18293 | cmp->offsets[i * 2] -= leftmost; | |
18294 | rightmost -= leftmost; | |
18295 | } | |
18296 | ||
18297 | cmp->pixel_width = rightmost; | |
18298 | cmp->ascent = highest; | |
18299 | cmp->descent = - lowest; | |
18300 | if (cmp->ascent < font_ascent) | |
18301 | cmp->ascent = font_ascent; | |
18302 | if (cmp->descent < font_descent) | |
18303 | cmp->descent = font_descent; | |
18304 | } | |
18305 | ||
18306 | it->pixel_width = cmp->pixel_width; | |
18307 | it->ascent = it->phys_ascent = cmp->ascent; | |
18308 | it->descent = it->phys_descent = cmp->descent; | |
18309 | ||
18310 | if (face->box != FACE_NO_BOX) | |
18311 | { | |
18312 | int thick = face->box_line_width; | |
18313 | ||
18314 | if (thick > 0) | |
18315 | { | |
18316 | it->ascent += thick; | |
18317 | it->descent += thick; | |
18318 | } | |
18319 | else | |
18320 | thick = - thick; | |
18321 | ||
18322 | if (it->start_of_box_run_p) | |
18323 | it->pixel_width += thick; | |
18324 | if (it->end_of_box_run_p) | |
18325 | it->pixel_width += thick; | |
18326 | } | |
18327 | ||
18328 | /* If face has an overline, add the height of the overline | |
18329 | (1 pixel) and a 1 pixel margin to the character height. */ | |
18330 | if (face->overline_p) | |
18331 | it->ascent += 2; | |
18332 | ||
18333 | take_vertical_position_into_account (it); | |
18334 | ||
18335 | if (it->glyph_row) | |
18336 | append_composite_glyph (it); | |
18337 | } | |
18338 | else if (it->what == IT_IMAGE) | |
18339 | produce_image_glyph (it); | |
18340 | else if (it->what == IT_STRETCH) | |
18341 | produce_stretch_glyph (it); | |
18342 | ||
18343 | /* Accumulate dimensions. Note: can't assume that it->descent > 0 | |
18344 | because this isn't true for images with `:ascent 100'. */ | |
18345 | xassert (it->ascent >= 0 && it->descent >= 0); | |
18346 | if (it->area == TEXT_AREA) | |
18347 | it->current_x += it->pixel_width; | |
18348 | ||
18349 | it->descent += it->extra_line_spacing; | |
18350 | ||
18351 | it->max_ascent = max (it->max_ascent, it->ascent); | |
18352 | it->max_descent = max (it->max_descent, it->descent); | |
18353 | it->max_phys_ascent = max (it->max_phys_ascent, it->phys_ascent); | |
18354 | it->max_phys_descent = max (it->max_phys_descent, it->phys_descent); | |
18355 | } | |
18356 | ||
fa3c6b4d KS |
18357 | /* EXPORT for RIF: |
18358 | Output LEN glyphs starting at START at the nominal cursor position. | |
18359 | Advance the nominal cursor over the text. The global variable | |
18360 | updated_window contains the window being updated, updated_row is | |
18361 | the glyph row being updated, and updated_area is the area of that | |
18362 | row being updated. */ | |
133c764e | 18363 | |
fa3c6b4d KS |
18364 | void |
18365 | x_write_glyphs (start, len) | |
18366 | struct glyph *start; | |
18367 | int len; | |
18368 | { | |
18369 | int x, hpos; | |
133c764e | 18370 | |
fa3c6b4d KS |
18371 | xassert (updated_window && updated_row); |
18372 | BLOCK_INPUT; | |
133c764e | 18373 | |
fa3c6b4d | 18374 | /* Write glyphs. */ |
cfe03a41 | 18375 | |
fa3c6b4d KS |
18376 | hpos = start - updated_row->glyphs[updated_area]; |
18377 | x = draw_glyphs (updated_window, output_cursor.x, | |
18378 | updated_row, updated_area, | |
18379 | hpos, hpos + len, | |
18380 | DRAW_NORMAL_TEXT, 0); | |
cfe03a41 | 18381 | |
fa3c6b4d KS |
18382 | /* Invalidate old phys cursor if the glyph at its hpos is redrawn. */ |
18383 | if (updated_area == TEXT_AREA | |
18384 | && updated_window->phys_cursor_on_p | |
18385 | && updated_window->phys_cursor.vpos == output_cursor.vpos | |
18386 | && updated_window->phys_cursor.hpos >= hpos | |
18387 | && updated_window->phys_cursor.hpos < hpos + len) | |
18388 | updated_window->phys_cursor_on_p = 0; | |
cfe03a41 | 18389 | |
fa3c6b4d | 18390 | UNBLOCK_INPUT; |
cfe03a41 | 18391 | |
fa3c6b4d KS |
18392 | /* Advance the output cursor. */ |
18393 | output_cursor.hpos += len; | |
18394 | output_cursor.x = x; | |
18395 | } | |
cfe03a41 | 18396 | |
cfe03a41 | 18397 | |
fa3c6b4d KS |
18398 | /* EXPORT for RIF: |
18399 | Insert LEN glyphs from START at the nominal cursor position. */ | |
18400 | ||
18401 | void | |
18402 | x_insert_glyphs (start, len) | |
18403 | struct glyph *start; | |
18404 | int len; | |
18405 | { | |
18406 | struct frame *f; | |
18407 | struct window *w; | |
18408 | int line_height, shift_by_width, shifted_region_width; | |
18409 | struct glyph_row *row; | |
18410 | struct glyph *glyph; | |
18411 | int frame_x, frame_y, hpos; | |
18412 | ||
18413 | xassert (updated_window && updated_row); | |
18414 | BLOCK_INPUT; | |
18415 | w = updated_window; | |
18416 | f = XFRAME (WINDOW_FRAME (w)); | |
18417 | ||
18418 | /* Get the height of the line we are in. */ | |
18419 | row = updated_row; | |
18420 | line_height = row->height; | |
18421 | ||
18422 | /* Get the width of the glyphs to insert. */ | |
18423 | shift_by_width = 0; | |
18424 | for (glyph = start; glyph < start + len; ++glyph) | |
18425 | shift_by_width += glyph->pixel_width; | |
18426 | ||
18427 | /* Get the width of the region to shift right. */ | |
18428 | shifted_region_width = (window_box_width (w, updated_area) | |
18429 | - output_cursor.x | |
18430 | - shift_by_width); | |
18431 | ||
18432 | /* Shift right. */ | |
18433 | frame_x = window_box_left (w, updated_area) + output_cursor.x; | |
18434 | frame_y = WINDOW_TO_FRAME_PIXEL_Y (w, output_cursor.y); | |
18435 | ||
7b7b454e AS |
18436 | rif->shift_glyphs_for_insert (f, frame_x, frame_y, shifted_region_width, |
18437 | line_height, shift_by_width); | |
fa3c6b4d KS |
18438 | |
18439 | /* Write the glyphs. */ | |
18440 | hpos = start - row->glyphs[updated_area]; | |
18441 | draw_glyphs (w, output_cursor.x, row, updated_area, | |
18442 | hpos, hpos + len, | |
18443 | DRAW_NORMAL_TEXT, 0); | |
18444 | ||
18445 | /* Advance the output cursor. */ | |
18446 | output_cursor.hpos += len; | |
18447 | output_cursor.x += shift_by_width; | |
18448 | UNBLOCK_INPUT; | |
18449 | } | |
18450 | ||
18451 | ||
18452 | /* EXPORT for RIF: | |
18453 | Erase the current text line from the nominal cursor position | |
18454 | (inclusive) to pixel column TO_X (exclusive). The idea is that | |
18455 | everything from TO_X onward is already erased. | |
18456 | ||
18457 | TO_X is a pixel position relative to updated_area of | |
18458 | updated_window. TO_X == -1 means clear to the end of this area. */ | |
18459 | ||
18460 | void | |
18461 | x_clear_end_of_line (to_x) | |
18462 | int to_x; | |
18463 | { | |
18464 | struct frame *f; | |
18465 | struct window *w = updated_window; | |
18466 | int max_x, min_y, max_y; | |
18467 | int from_x, from_y, to_y; | |
18468 | ||
18469 | xassert (updated_window && updated_row); | |
18470 | f = XFRAME (w->frame); | |
18471 | ||
18472 | if (updated_row->full_width_p) | |
da8b7f4f | 18473 | max_x = WINDOW_TOTAL_WIDTH (w); |
fa3c6b4d KS |
18474 | else |
18475 | max_x = window_box_width (w, updated_area); | |
18476 | max_y = window_text_bottom_y (w); | |
18477 | ||
18478 | /* TO_X == 0 means don't do anything. TO_X < 0 means clear to end | |
18479 | of window. For TO_X > 0, truncate to end of drawing area. */ | |
18480 | if (to_x == 0) | |
18481 | return; | |
18482 | else if (to_x < 0) | |
18483 | to_x = max_x; | |
18484 | else | |
18485 | to_x = min (to_x, max_x); | |
18486 | ||
18487 | to_y = min (max_y, output_cursor.y + updated_row->height); | |
18488 | ||
18489 | /* Notice if the cursor will be cleared by this operation. */ | |
18490 | if (!updated_row->full_width_p) | |
18491 | notice_overwritten_cursor (w, updated_area, | |
18492 | output_cursor.x, -1, | |
18493 | updated_row->y, | |
18494 | MATRIX_ROW_BOTTOM_Y (updated_row)); | |
18495 | ||
18496 | from_x = output_cursor.x; | |
18497 | ||
18498 | /* Translate to frame coordinates. */ | |
18499 | if (updated_row->full_width_p) | |
18500 | { | |
18501 | from_x = WINDOW_TO_FRAME_PIXEL_X (w, from_x); | |
18502 | to_x = WINDOW_TO_FRAME_PIXEL_X (w, to_x); | |
18503 | } | |
18504 | else | |
18505 | { | |
da8b7f4f KS |
18506 | int area_left = window_box_left (w, updated_area); |
18507 | from_x += area_left; | |
18508 | to_x += area_left; | |
fa3c6b4d KS |
18509 | } |
18510 | ||
da8b7f4f | 18511 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
fa3c6b4d KS |
18512 | from_y = WINDOW_TO_FRAME_PIXEL_Y (w, max (min_y, output_cursor.y)); |
18513 | to_y = WINDOW_TO_FRAME_PIXEL_Y (w, to_y); | |
18514 | ||
18515 | /* Prevent inadvertently clearing to end of the X window. */ | |
18516 | if (to_x > from_x && to_y > from_y) | |
18517 | { | |
18518 | BLOCK_INPUT; | |
18519 | rif->clear_frame_area (f, from_x, from_y, | |
18520 | to_x - from_x, to_y - from_y); | |
18521 | UNBLOCK_INPUT; | |
18522 | } | |
18523 | } | |
18524 | ||
18525 | #endif /* HAVE_WINDOW_SYSTEM */ | |
18526 | ||
18527 | ||
18528 | \f | |
18529 | /*********************************************************************** | |
18530 | Cursor types | |
18531 | ***********************************************************************/ | |
18532 | ||
18533 | /* Value is the internal representation of the specified cursor type | |
18534 | ARG. If type is BAR_CURSOR, return in *WIDTH the specified width | |
18535 | of the bar cursor. */ | |
18536 | ||
18537 | enum text_cursor_kinds | |
18538 | get_specified_cursor_type (arg, width) | |
18539 | Lisp_Object arg; | |
18540 | int *width; | |
18541 | { | |
18542 | enum text_cursor_kinds type; | |
18543 | ||
18544 | if (NILP (arg)) | |
18545 | return NO_CURSOR; | |
18546 | ||
18547 | if (EQ (arg, Qbox)) | |
18548 | return FILLED_BOX_CURSOR; | |
18549 | ||
18550 | if (EQ (arg, Qhollow)) | |
18551 | return HOLLOW_BOX_CURSOR; | |
18552 | ||
18553 | if (EQ (arg, Qbar)) | |
18554 | { | |
18555 | *width = 2; | |
18556 | return BAR_CURSOR; | |
18557 | } | |
18558 | ||
18559 | if (CONSP (arg) | |
18560 | && EQ (XCAR (arg), Qbar) | |
18561 | && INTEGERP (XCDR (arg)) | |
18562 | && XINT (XCDR (arg)) >= 0) | |
18563 | { | |
18564 | *width = XINT (XCDR (arg)); | |
18565 | return BAR_CURSOR; | |
18566 | } | |
18567 | ||
18568 | if (EQ (arg, Qhbar)) | |
18569 | { | |
18570 | *width = 2; | |
18571 | return HBAR_CURSOR; | |
18572 | } | |
18573 | ||
18574 | if (CONSP (arg) | |
18575 | && EQ (XCAR (arg), Qhbar) | |
18576 | && INTEGERP (XCDR (arg)) | |
18577 | && XINT (XCDR (arg)) >= 0) | |
18578 | { | |
18579 | *width = XINT (XCDR (arg)); | |
18580 | return HBAR_CURSOR; | |
18581 | } | |
18582 | ||
18583 | /* Treat anything unknown as "hollow box cursor". | |
18584 | It was bad to signal an error; people have trouble fixing | |
18585 | .Xdefaults with Emacs, when it has something bad in it. */ | |
18586 | type = HOLLOW_BOX_CURSOR; | |
18587 | ||
18588 | return type; | |
18589 | } | |
18590 | ||
18591 | /* Set the default cursor types for specified frame. */ | |
18592 | void | |
18593 | set_frame_cursor_types (f, arg) | |
18594 | struct frame *f; | |
18595 | Lisp_Object arg; | |
18596 | { | |
18597 | int width; | |
18598 | Lisp_Object tem; | |
18599 | ||
18600 | FRAME_DESIRED_CURSOR (f) = get_specified_cursor_type (arg, &width); | |
18601 | FRAME_CURSOR_WIDTH (f) = width; | |
18602 | ||
18603 | /* By default, set up the blink-off state depending on the on-state. */ | |
18604 | ||
18605 | tem = Fassoc (arg, Vblink_cursor_alist); | |
18606 | if (!NILP (tem)) | |
18607 | { | |
18608 | FRAME_BLINK_OFF_CURSOR (f) | |
18609 | = get_specified_cursor_type (XCDR (tem), &width); | |
18610 | FRAME_BLINK_OFF_CURSOR_WIDTH (f) = width; | |
18611 | } | |
18612 | else | |
18613 | FRAME_BLINK_OFF_CURSOR (f) = DEFAULT_CURSOR; | |
18614 | } | |
18615 | ||
18616 | ||
18617 | /* Return the cursor we want to be displayed in window W. Return | |
18618 | width of bar/hbar cursor through WIDTH arg. Return with | |
18619 | ACTIVE_CURSOR arg set to 1 if cursor in window W is `active' | |
18620 | (i.e. if the `system caret' should track this cursor). | |
18621 | ||
18622 | In a mini-buffer window, we want the cursor only to appear if we | |
18623 | are reading input from this window. For the selected window, we | |
18624 | want the cursor type given by the frame parameter or buffer local | |
18625 | setting of cursor-type. If explicitly marked off, draw no cursor. | |
18626 | In all other cases, we want a hollow box cursor. */ | |
18627 | ||
18628 | enum text_cursor_kinds | |
18629 | get_window_cursor_type (w, width, active_cursor) | |
18630 | struct window *w; | |
18631 | int *width; | |
18632 | int *active_cursor; | |
18633 | { | |
18634 | struct frame *f = XFRAME (w->frame); | |
18635 | struct buffer *b = XBUFFER (w->buffer); | |
18636 | int cursor_type = DEFAULT_CURSOR; | |
18637 | Lisp_Object alt_cursor; | |
18638 | int non_selected = 0; | |
18639 | ||
18640 | *active_cursor = 1; | |
18641 | ||
18642 | /* Echo area */ | |
18643 | if (cursor_in_echo_area | |
18644 | && FRAME_HAS_MINIBUF_P (f) | |
18645 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
18646 | { | |
18647 | if (w == XWINDOW (echo_area_window)) | |
18648 | { | |
18649 | *width = FRAME_CURSOR_WIDTH (f); | |
18650 | return FRAME_DESIRED_CURSOR (f); | |
18651 | } | |
18652 | ||
18653 | *active_cursor = 0; | |
18654 | non_selected = 1; | |
18655 | } | |
18656 | ||
18657 | /* Nonselected window or nonselected frame. */ | |
18658 | else if (w != XWINDOW (f->selected_window) | |
18659 | #ifdef HAVE_WINDOW_SYSTEM | |
18660 | || f != FRAME_X_DISPLAY_INFO (f)->x_highlight_frame | |
18661 | #endif | |
18662 | ) | |
18663 | { | |
18664 | *active_cursor = 0; | |
18665 | ||
18666 | if (MINI_WINDOW_P (w) && minibuf_level == 0) | |
18667 | return NO_CURSOR; | |
18668 | ||
18669 | non_selected = 1; | |
18670 | } | |
18671 | ||
18672 | /* Never display a cursor in a window in which cursor-type is nil. */ | |
18673 | if (NILP (b->cursor_type)) | |
18674 | return NO_CURSOR; | |
18675 | ||
18676 | /* Use cursor-in-non-selected-windows for non-selected window or frame. */ | |
18677 | if (non_selected) | |
18678 | { | |
18679 | alt_cursor = Fbuffer_local_value (Qcursor_in_non_selected_windows, w->buffer); | |
18680 | return get_specified_cursor_type (alt_cursor, width); | |
18681 | } | |
18682 | ||
18683 | /* Get the normal cursor type for this window. */ | |
18684 | if (EQ (b->cursor_type, Qt)) | |
18685 | { | |
18686 | cursor_type = FRAME_DESIRED_CURSOR (f); | |
18687 | *width = FRAME_CURSOR_WIDTH (f); | |
18688 | } | |
18689 | else | |
18690 | cursor_type = get_specified_cursor_type (b->cursor_type, width); | |
18691 | ||
18692 | /* Use normal cursor if not blinked off. */ | |
18693 | if (!w->cursor_off_p) | |
18694 | return cursor_type; | |
18695 | ||
18696 | /* Cursor is blinked off, so determine how to "toggle" it. */ | |
18697 | ||
18698 | /* First look for an entry matching the buffer's cursor-type in blink-cursor-alist. */ | |
18699 | if ((alt_cursor = Fassoc (b->cursor_type, Vblink_cursor_alist), !NILP (alt_cursor))) | |
18700 | return get_specified_cursor_type (XCDR (alt_cursor), width); | |
18701 | ||
18702 | /* Then see if frame has specified a specific blink off cursor type. */ | |
18703 | if (FRAME_BLINK_OFF_CURSOR (f) != DEFAULT_CURSOR) | |
18704 | { | |
18705 | *width = FRAME_BLINK_OFF_CURSOR_WIDTH (f); | |
18706 | return FRAME_BLINK_OFF_CURSOR (f); | |
18707 | } | |
18708 | ||
18709 | /* Finally perform built-in cursor blinking: | |
18710 | filled box <-> hollow box | |
18711 | wide [h]bar <-> narrow [h]bar | |
18712 | narrow [h]bar <-> no cursor | |
18713 | other type <-> no cursor */ | |
18714 | ||
18715 | if (cursor_type == FILLED_BOX_CURSOR) | |
18716 | return HOLLOW_BOX_CURSOR; | |
18717 | ||
18718 | if ((cursor_type == BAR_CURSOR || cursor_type == HBAR_CURSOR) && *width > 1) | |
18719 | { | |
18720 | *width = 1; | |
18721 | return cursor_type; | |
18722 | } | |
18723 | ||
18724 | return NO_CURSOR; | |
18725 | } | |
18726 | ||
18727 | ||
18728 | #ifdef HAVE_WINDOW_SYSTEM | |
18729 | ||
18730 | /* Notice when the text cursor of window W has been completely | |
18731 | overwritten by a drawing operation that outputs glyphs in AREA | |
18732 | starting at X0 and ending at X1 in the line starting at Y0 and | |
18733 | ending at Y1. X coordinates are area-relative. X1 < 0 means all | |
18734 | the rest of the line after X0 has been written. Y coordinates | |
18735 | are window-relative. */ | |
18736 | ||
18737 | static void | |
18738 | notice_overwritten_cursor (w, area, x0, x1, y0, y1) | |
18739 | struct window *w; | |
18740 | enum glyph_row_area area; | |
18741 | int x0, y0, x1, y1; | |
18742 | { | |
fa3c6b4d KS |
18743 | if (area == TEXT_AREA && w->phys_cursor_on_p) |
18744 | { | |
18745 | int cx0 = w->phys_cursor.x; | |
18746 | int cx1 = cx0 + w->phys_cursor_width; | |
18747 | int cy0 = w->phys_cursor.y; | |
18748 | int cy1 = cy0 + w->phys_cursor_height; | |
18749 | ||
18750 | if (x0 <= cx0 && (x1 < 0 || x1 >= cx1)) | |
18751 | { | |
18752 | /* The cursor image will be completely removed from the | |
18753 | screen if the output area intersects the cursor area in | |
18754 | y-direction. When we draw in [y0 y1[, and some part of | |
18755 | the cursor is at y < y0, that part must have been drawn | |
18756 | before. When scrolling, the cursor is erased before | |
18757 | actually scrolling, so we don't come here. When not | |
18758 | scrolling, the rows above the old cursor row must have | |
18759 | changed, and in this case these rows must have written | |
18760 | over the cursor image. | |
18761 | ||
18762 | Likewise if part of the cursor is below y1, with the | |
18763 | exception of the cursor being in the first blank row at | |
18764 | the buffer and window end because update_text_area | |
18765 | doesn't draw that row. (Except when it does, but | |
18766 | that's handled in update_text_area.) */ | |
18767 | ||
18768 | if (((y0 >= cy0 && y0 < cy1) || (y1 > cy0 && y1 < cy1)) | |
18769 | && w->current_matrix->rows[w->phys_cursor.vpos].displays_text_p) | |
18770 | w->phys_cursor_on_p = 0; | |
18771 | } | |
18772 | } | |
fa3c6b4d KS |
18773 | } |
18774 | ||
18775 | #endif /* HAVE_WINDOW_SYSTEM */ | |
18776 | ||
18777 | \f | |
18778 | /************************************************************************ | |
18779 | Mouse Face | |
18780 | ************************************************************************/ | |
18781 | ||
18782 | #ifdef HAVE_WINDOW_SYSTEM | |
18783 | ||
18784 | /* EXPORT for RIF: | |
18785 | Fix the display of area AREA of overlapping row ROW in window W. */ | |
18786 | ||
18787 | void | |
18788 | x_fix_overlapping_area (w, row, area) | |
18789 | struct window *w; | |
18790 | struct glyph_row *row; | |
18791 | enum glyph_row_area area; | |
18792 | { | |
18793 | int i, x; | |
18794 | ||
18795 | BLOCK_INPUT; | |
18796 | ||
57dd22f4 | 18797 | x = 0; |
fa3c6b4d KS |
18798 | for (i = 0; i < row->used[area];) |
18799 | { | |
18800 | if (row->glyphs[area][i].overlaps_vertically_p) | |
18801 | { | |
18802 | int start = i, start_x = x; | |
18803 | ||
18804 | do | |
18805 | { | |
18806 | x += row->glyphs[area][i].pixel_width; | |
18807 | ++i; | |
18808 | } | |
18809 | while (i < row->used[area] | |
18810 | && row->glyphs[area][i].overlaps_vertically_p); | |
18811 | ||
18812 | draw_glyphs (w, start_x, row, area, | |
18813 | start, i, | |
18814 | DRAW_NORMAL_TEXT, 1); | |
18815 | } | |
18816 | else | |
18817 | { | |
18818 | x += row->glyphs[area][i].pixel_width; | |
18819 | ++i; | |
18820 | } | |
18821 | } | |
18822 | ||
18823 | UNBLOCK_INPUT; | |
18824 | } | |
18825 | ||
18826 | ||
18827 | /* EXPORT: | |
18828 | Draw the cursor glyph of window W in glyph row ROW. See the | |
18829 | comment of draw_glyphs for the meaning of HL. */ | |
18830 | ||
18831 | void | |
18832 | draw_phys_cursor_glyph (w, row, hl) | |
18833 | struct window *w; | |
18834 | struct glyph_row *row; | |
18835 | enum draw_glyphs_face hl; | |
18836 | { | |
18837 | /* If cursor hpos is out of bounds, don't draw garbage. This can | |
18838 | happen in mini-buffer windows when switching between echo area | |
18839 | glyphs and mini-buffer. */ | |
18840 | if (w->phys_cursor.hpos < row->used[TEXT_AREA]) | |
18841 | { | |
18842 | int on_p = w->phys_cursor_on_p; | |
18843 | int x1; | |
18844 | x1 = draw_glyphs (w, w->phys_cursor.x, row, TEXT_AREA, | |
18845 | w->phys_cursor.hpos, w->phys_cursor.hpos + 1, | |
18846 | hl, 0); | |
18847 | w->phys_cursor_on_p = on_p; | |
18848 | ||
fa3c6b4d KS |
18849 | if (hl == DRAW_CURSOR) |
18850 | w->phys_cursor_width = x1 - w->phys_cursor.x; | |
fa3c6b4d KS |
18851 | /* When we erase the cursor, and ROW is overlapped by other |
18852 | rows, make sure that these overlapping parts of other rows | |
18853 | are redrawn. */ | |
365fa1b3 | 18854 | else if (hl == DRAW_NORMAL_TEXT && row->overlapped_p) |
fa3c6b4d KS |
18855 | { |
18856 | if (row > w->current_matrix->rows | |
18857 | && MATRIX_ROW_OVERLAPS_SUCC_P (row - 1)) | |
18858 | x_fix_overlapping_area (w, row - 1, TEXT_AREA); | |
18859 | ||
18860 | if (MATRIX_ROW_BOTTOM_Y (row) < window_text_bottom_y (w) | |
18861 | && MATRIX_ROW_OVERLAPS_PRED_P (row + 1)) | |
18862 | x_fix_overlapping_area (w, row + 1, TEXT_AREA); | |
18863 | } | |
18864 | } | |
18865 | } | |
18866 | ||
18867 | ||
18868 | /* EXPORT: | |
18869 | Erase the image of a cursor of window W from the screen. */ | |
18870 | ||
18871 | void | |
18872 | erase_phys_cursor (w) | |
18873 | struct window *w; | |
18874 | { | |
18875 | struct frame *f = XFRAME (w->frame); | |
18876 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
18877 | int hpos = w->phys_cursor.hpos; | |
18878 | int vpos = w->phys_cursor.vpos; | |
18879 | int mouse_face_here_p = 0; | |
18880 | struct glyph_matrix *active_glyphs = w->current_matrix; | |
18881 | struct glyph_row *cursor_row; | |
18882 | struct glyph *cursor_glyph; | |
18883 | enum draw_glyphs_face hl; | |
18884 | ||
18885 | /* No cursor displayed or row invalidated => nothing to do on the | |
18886 | screen. */ | |
18887 | if (w->phys_cursor_type == NO_CURSOR) | |
18888 | goto mark_cursor_off; | |
18889 | ||
18890 | /* VPOS >= active_glyphs->nrows means that window has been resized. | |
18891 | Don't bother to erase the cursor. */ | |
18892 | if (vpos >= active_glyphs->nrows) | |
18893 | goto mark_cursor_off; | |
18894 | ||
18895 | /* If row containing cursor is marked invalid, there is nothing we | |
18896 | can do. */ | |
18897 | cursor_row = MATRIX_ROW (active_glyphs, vpos); | |
18898 | if (!cursor_row->enabled_p) | |
18899 | goto mark_cursor_off; | |
18900 | ||
18901 | /* If row is completely invisible, don't attempt to delete a cursor which | |
18902 | isn't there. This can happen if cursor is at top of a window, and | |
18903 | we switch to a buffer with a header line in that window. */ | |
18904 | if (cursor_row->visible_height <= 0) | |
18905 | goto mark_cursor_off; | |
18906 | ||
18907 | /* This can happen when the new row is shorter than the old one. | |
18908 | In this case, either draw_glyphs or clear_end_of_line | |
18909 | should have cleared the cursor. Note that we wouldn't be | |
18910 | able to erase the cursor in this case because we don't have a | |
18911 | cursor glyph at hand. */ | |
18912 | if (w->phys_cursor.hpos >= cursor_row->used[TEXT_AREA]) | |
18913 | goto mark_cursor_off; | |
18914 | ||
18915 | /* If the cursor is in the mouse face area, redisplay that when | |
18916 | we clear the cursor. */ | |
18917 | if (! NILP (dpyinfo->mouse_face_window) | |
18918 | && w == XWINDOW (dpyinfo->mouse_face_window) | |
18919 | && (vpos > dpyinfo->mouse_face_beg_row | |
18920 | || (vpos == dpyinfo->mouse_face_beg_row | |
18921 | && hpos >= dpyinfo->mouse_face_beg_col)) | |
18922 | && (vpos < dpyinfo->mouse_face_end_row | |
18923 | || (vpos == dpyinfo->mouse_face_end_row | |
18924 | && hpos < dpyinfo->mouse_face_end_col)) | |
18925 | /* Don't redraw the cursor's spot in mouse face if it is at the | |
18926 | end of a line (on a newline). The cursor appears there, but | |
18927 | mouse highlighting does not. */ | |
18928 | && cursor_row->used[TEXT_AREA] > hpos) | |
18929 | mouse_face_here_p = 1; | |
18930 | ||
18931 | /* Maybe clear the display under the cursor. */ | |
18932 | if (w->phys_cursor_type == HOLLOW_BOX_CURSOR) | |
18933 | { | |
18934 | int x, y; | |
da8b7f4f | 18935 | int header_line_height = WINDOW_HEADER_LINE_HEIGHT (w); |
fa3c6b4d KS |
18936 | |
18937 | cursor_glyph = get_phys_cursor_glyph (w); | |
18938 | if (cursor_glyph == NULL) | |
18939 | goto mark_cursor_off; | |
18940 | ||
18941 | x = WINDOW_TEXT_TO_FRAME_PIXEL_X (w, w->phys_cursor.x); | |
18942 | y = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height, cursor_row->y)); | |
18943 | ||
18944 | rif->clear_frame_area (f, x, y, | |
18945 | cursor_glyph->pixel_width, cursor_row->visible_height); | |
18946 | } | |
18947 | ||
18948 | /* Erase the cursor by redrawing the character underneath it. */ | |
18949 | if (mouse_face_here_p) | |
18950 | hl = DRAW_MOUSE_FACE; | |
18951 | else | |
18952 | hl = DRAW_NORMAL_TEXT; | |
18953 | draw_phys_cursor_glyph (w, cursor_row, hl); | |
18954 | ||
18955 | mark_cursor_off: | |
18956 | w->phys_cursor_on_p = 0; | |
18957 | w->phys_cursor_type = NO_CURSOR; | |
18958 | } | |
18959 | ||
18960 | ||
18961 | /* EXPORT: | |
18962 | Display or clear cursor of window W. If ON is zero, clear the | |
18963 | cursor. If it is non-zero, display the cursor. If ON is nonzero, | |
18964 | where to put the cursor is specified by HPOS, VPOS, X and Y. */ | |
18965 | ||
18966 | void | |
18967 | display_and_set_cursor (w, on, hpos, vpos, x, y) | |
18968 | struct window *w; | |
18969 | int on, hpos, vpos, x, y; | |
18970 | { | |
18971 | struct frame *f = XFRAME (w->frame); | |
18972 | int new_cursor_type; | |
18973 | int new_cursor_width; | |
18974 | int active_cursor; | |
18975 | struct glyph_matrix *current_glyphs; | |
18976 | struct glyph_row *glyph_row; | |
18977 | struct glyph *glyph; | |
18978 | ||
18979 | /* This is pointless on invisible frames, and dangerous on garbaged | |
18980 | windows and frames; in the latter case, the frame or window may | |
18981 | be in the midst of changing its size, and x and y may be off the | |
18982 | window. */ | |
18983 | if (! FRAME_VISIBLE_P (f) | |
18984 | || FRAME_GARBAGED_P (f) | |
18985 | || vpos >= w->current_matrix->nrows | |
18986 | || hpos >= w->current_matrix->matrix_w) | |
18987 | return; | |
18988 | ||
18989 | /* If cursor is off and we want it off, return quickly. */ | |
18990 | if (!on && !w->phys_cursor_on_p) | |
18991 | return; | |
18992 | ||
18993 | current_glyphs = w->current_matrix; | |
18994 | glyph_row = MATRIX_ROW (current_glyphs, vpos); | |
18995 | glyph = glyph_row->glyphs[TEXT_AREA] + hpos; | |
18996 | ||
18997 | /* If cursor row is not enabled, we don't really know where to | |
18998 | display the cursor. */ | |
18999 | if (!glyph_row->enabled_p) | |
19000 | { | |
19001 | w->phys_cursor_on_p = 0; | |
19002 | return; | |
19003 | } | |
19004 | ||
19005 | xassert (interrupt_input_blocked); | |
19006 | ||
19007 | /* Set new_cursor_type to the cursor we want to be displayed. */ | |
19008 | new_cursor_type = get_window_cursor_type (w, &new_cursor_width, &active_cursor); | |
19009 | ||
19010 | /* If cursor is currently being shown and we don't want it to be or | |
19011 | it is in the wrong place, or the cursor type is not what we want, | |
19012 | erase it. */ | |
19013 | if (w->phys_cursor_on_p | |
19014 | && (!on | |
19015 | || w->phys_cursor.x != x | |
19016 | || w->phys_cursor.y != y | |
19017 | || new_cursor_type != w->phys_cursor_type | |
19018 | || ((new_cursor_type == BAR_CURSOR || new_cursor_type == HBAR_CURSOR) | |
19019 | && new_cursor_width != w->phys_cursor_width))) | |
19020 | erase_phys_cursor (w); | |
19021 | ||
19022 | /* Don't check phys_cursor_on_p here because that flag is only set | |
19023 | to zero in some cases where we know that the cursor has been | |
19024 | completely erased, to avoid the extra work of erasing the cursor | |
19025 | twice. In other words, phys_cursor_on_p can be 1 and the cursor | |
19026 | still not be visible, or it has only been partly erased. */ | |
19027 | if (on) | |
19028 | { | |
19029 | w->phys_cursor_ascent = glyph_row->ascent; | |
19030 | w->phys_cursor_height = glyph_row->height; | |
19031 | ||
19032 | /* Set phys_cursor_.* before x_draw_.* is called because some | |
19033 | of them may need the information. */ | |
19034 | w->phys_cursor.x = x; | |
19035 | w->phys_cursor.y = glyph_row->y; | |
19036 | w->phys_cursor.hpos = hpos; | |
19037 | w->phys_cursor.vpos = vpos; | |
19038 | } | |
19039 | ||
b4ebbb12 KS |
19040 | rif->draw_window_cursor (w, glyph_row, x, y, |
19041 | new_cursor_type, new_cursor_width, | |
19042 | on, active_cursor); | |
fa3c6b4d KS |
19043 | } |
19044 | ||
19045 | ||
19046 | /* Switch the display of W's cursor on or off, according to the value | |
19047 | of ON. */ | |
19048 | ||
19049 | static void | |
19050 | update_window_cursor (w, on) | |
19051 | struct window *w; | |
19052 | int on; | |
19053 | { | |
19054 | /* Don't update cursor in windows whose frame is in the process | |
19055 | of being deleted. */ | |
19056 | if (w->current_matrix) | |
19057 | { | |
19058 | BLOCK_INPUT; | |
19059 | display_and_set_cursor (w, on, w->phys_cursor.hpos, w->phys_cursor.vpos, | |
19060 | w->phys_cursor.x, w->phys_cursor.y); | |
19061 | UNBLOCK_INPUT; | |
19062 | } | |
19063 | } | |
19064 | ||
19065 | ||
19066 | /* Call update_window_cursor with parameter ON_P on all leaf windows | |
19067 | in the window tree rooted at W. */ | |
19068 | ||
19069 | static void | |
19070 | update_cursor_in_window_tree (w, on_p) | |
19071 | struct window *w; | |
19072 | int on_p; | |
19073 | { | |
19074 | while (w) | |
19075 | { | |
19076 | if (!NILP (w->hchild)) | |
19077 | update_cursor_in_window_tree (XWINDOW (w->hchild), on_p); | |
19078 | else if (!NILP (w->vchild)) | |
19079 | update_cursor_in_window_tree (XWINDOW (w->vchild), on_p); | |
19080 | else | |
19081 | update_window_cursor (w, on_p); | |
19082 | ||
19083 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
19084 | } | |
19085 | } | |
19086 | ||
19087 | ||
19088 | /* EXPORT: | |
19089 | Display the cursor on window W, or clear it, according to ON_P. | |
19090 | Don't change the cursor's position. */ | |
19091 | ||
19092 | void | |
19093 | x_update_cursor (f, on_p) | |
19094 | struct frame *f; | |
19095 | int on_p; | |
19096 | { | |
19097 | update_cursor_in_window_tree (XWINDOW (f->root_window), on_p); | |
19098 | } | |
19099 | ||
19100 | ||
19101 | /* EXPORT: | |
19102 | Clear the cursor of window W to background color, and mark the | |
19103 | cursor as not shown. This is used when the text where the cursor | |
19104 | is is about to be rewritten. */ | |
19105 | ||
19106 | void | |
19107 | x_clear_cursor (w) | |
19108 | struct window *w; | |
19109 | { | |
19110 | if (FRAME_VISIBLE_P (XFRAME (w->frame)) && w->phys_cursor_on_p) | |
19111 | update_window_cursor (w, 0); | |
19112 | } | |
19113 | ||
19114 | ||
19115 | /* EXPORT: | |
19116 | Display the active region described by mouse_face_* according to DRAW. */ | |
19117 | ||
19118 | void | |
19119 | show_mouse_face (dpyinfo, draw) | |
19120 | Display_Info *dpyinfo; | |
19121 | enum draw_glyphs_face draw; | |
19122 | { | |
19123 | struct window *w = XWINDOW (dpyinfo->mouse_face_window); | |
19124 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
19125 | ||
19126 | if (/* If window is in the process of being destroyed, don't bother | |
19127 | to do anything. */ | |
19128 | w->current_matrix != NULL | |
19129 | /* Don't update mouse highlight if hidden */ | |
19130 | && (draw != DRAW_MOUSE_FACE || !dpyinfo->mouse_face_hidden) | |
19131 | /* Recognize when we are called to operate on rows that don't exist | |
19132 | anymore. This can happen when a window is split. */ | |
19133 | && dpyinfo->mouse_face_end_row < w->current_matrix->nrows) | |
19134 | { | |
19135 | int phys_cursor_on_p = w->phys_cursor_on_p; | |
19136 | struct glyph_row *row, *first, *last; | |
19137 | ||
19138 | first = MATRIX_ROW (w->current_matrix, dpyinfo->mouse_face_beg_row); | |
19139 | last = MATRIX_ROW (w->current_matrix, dpyinfo->mouse_face_end_row); | |
19140 | ||
19141 | for (row = first; row <= last && row->enabled_p; ++row) | |
19142 | { | |
19143 | int start_hpos, end_hpos, start_x; | |
19144 | ||
19145 | /* For all but the first row, the highlight starts at column 0. */ | |
19146 | if (row == first) | |
19147 | { | |
19148 | start_hpos = dpyinfo->mouse_face_beg_col; | |
19149 | start_x = dpyinfo->mouse_face_beg_x; | |
19150 | } | |
19151 | else | |
19152 | { | |
19153 | start_hpos = 0; | |
19154 | start_x = 0; | |
19155 | } | |
19156 | ||
19157 | if (row == last) | |
19158 | end_hpos = dpyinfo->mouse_face_end_col; | |
19159 | else | |
19160 | end_hpos = row->used[TEXT_AREA]; | |
19161 | ||
19162 | if (end_hpos > start_hpos) | |
19163 | { | |
19164 | draw_glyphs (w, start_x, row, TEXT_AREA, | |
19165 | start_hpos, end_hpos, | |
19166 | draw, 0); | |
19167 | ||
19168 | row->mouse_face_p | |
19169 | = draw == DRAW_MOUSE_FACE || draw == DRAW_IMAGE_RAISED; | |
19170 | } | |
19171 | } | |
19172 | ||
19173 | /* When we've written over the cursor, arrange for it to | |
19174 | be displayed again. */ | |
19175 | if (phys_cursor_on_p && !w->phys_cursor_on_p) | |
19176 | { | |
19177 | BLOCK_INPUT; | |
19178 | display_and_set_cursor (w, 1, | |
19179 | w->phys_cursor.hpos, w->phys_cursor.vpos, | |
19180 | w->phys_cursor.x, w->phys_cursor.y); | |
19181 | UNBLOCK_INPUT; | |
19182 | } | |
19183 | } | |
19184 | ||
19185 | /* Change the mouse cursor. */ | |
19186 | if (draw == DRAW_NORMAL_TEXT) | |
19187 | rif->define_frame_cursor (f, FRAME_X_OUTPUT (f)->text_cursor); | |
19188 | else if (draw == DRAW_MOUSE_FACE) | |
19189 | rif->define_frame_cursor (f, FRAME_X_OUTPUT (f)->hand_cursor); | |
19190 | else | |
19191 | rif->define_frame_cursor (f, FRAME_X_OUTPUT (f)->nontext_cursor); | |
19192 | } | |
19193 | ||
19194 | /* EXPORT: | |
19195 | Clear out the mouse-highlighted active region. | |
19196 | Redraw it un-highlighted first. Value is non-zero if mouse | |
19197 | face was actually drawn unhighlighted. */ | |
19198 | ||
19199 | int | |
19200 | clear_mouse_face (dpyinfo) | |
19201 | Display_Info *dpyinfo; | |
19202 | { | |
19203 | int cleared = 0; | |
19204 | ||
19205 | if (!NILP (dpyinfo->mouse_face_window)) | |
19206 | { | |
19207 | show_mouse_face (dpyinfo, DRAW_NORMAL_TEXT); | |
19208 | cleared = 1; | |
19209 | } | |
19210 | ||
19211 | dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1; | |
19212 | dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1; | |
19213 | dpyinfo->mouse_face_window = Qnil; | |
19214 | dpyinfo->mouse_face_overlay = Qnil; | |
19215 | return cleared; | |
19216 | } | |
19217 | ||
19218 | ||
19219 | /* EXPORT: | |
19220 | Non-zero if physical cursor of window W is within mouse face. */ | |
19221 | ||
19222 | int | |
19223 | cursor_in_mouse_face_p (w) | |
19224 | struct window *w; | |
19225 | { | |
19226 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (XFRAME (w->frame)); | |
19227 | int in_mouse_face = 0; | |
19228 | ||
19229 | if (WINDOWP (dpyinfo->mouse_face_window) | |
19230 | && XWINDOW (dpyinfo->mouse_face_window) == w) | |
19231 | { | |
19232 | int hpos = w->phys_cursor.hpos; | |
19233 | int vpos = w->phys_cursor.vpos; | |
19234 | ||
19235 | if (vpos >= dpyinfo->mouse_face_beg_row | |
19236 | && vpos <= dpyinfo->mouse_face_end_row | |
19237 | && (vpos > dpyinfo->mouse_face_beg_row | |
19238 | || hpos >= dpyinfo->mouse_face_beg_col) | |
19239 | && (vpos < dpyinfo->mouse_face_end_row | |
19240 | || hpos < dpyinfo->mouse_face_end_col | |
19241 | || dpyinfo->mouse_face_past_end)) | |
19242 | in_mouse_face = 1; | |
19243 | } | |
19244 | ||
19245 | return in_mouse_face; | |
19246 | } | |
19247 | ||
19248 | ||
19249 | ||
19250 | \f | |
19251 | /* Find the glyph matrix position of buffer position CHARPOS in window | |
19252 | *W. HPOS, *VPOS, *X, and *Y are set to the positions found. W's | |
19253 | current glyphs must be up to date. If CHARPOS is above window | |
19254 | start return (0, 0, 0, 0). If CHARPOS is after end of W, return end | |
19255 | of last line in W. In the row containing CHARPOS, stop before glyphs | |
19256 | having STOP as object. */ | |
19257 | ||
9c3521e0 | 19258 | #if 1 /* This is a version of fast_find_position that's more correct |
fa3c6b4d KS |
19259 | in the presence of hscrolling, for example. I didn't install |
19260 | it right away because the problem fixed is minor, it failed | |
19261 | in 20.x as well, and I think it's too risky to install | |
19262 | so near the release of 21.1. 2001-09-25 gerd. */ | |
19263 | ||
19264 | static int | |
19265 | fast_find_position (w, charpos, hpos, vpos, x, y, stop) | |
19266 | struct window *w; | |
19267 | int charpos; | |
19268 | int *hpos, *vpos, *x, *y; | |
19269 | Lisp_Object stop; | |
19270 | { | |
19271 | struct glyph_row *row, *first; | |
19272 | struct glyph *glyph, *end; | |
b19a5b64 | 19273 | int past_end = 0; |
fa3c6b4d KS |
19274 | |
19275 | first = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
19276 | row = row_containing_pos (w, charpos, first, NULL, 0); | |
19277 | if (row == NULL) | |
19278 | { | |
19279 | if (charpos < MATRIX_ROW_START_CHARPOS (first)) | |
19280 | { | |
19281 | *x = *y = *hpos = *vpos = 0; | |
19282 | return 0; | |
19283 | } | |
19284 | else | |
19285 | { | |
19286 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
19287 | past_end = 1; | |
19288 | } | |
19289 | } | |
19290 | ||
19291 | *x = row->x; | |
19292 | *y = row->y; | |
19293 | *vpos = MATRIX_ROW_VPOS (row, w->current_matrix); | |
19294 | ||
19295 | glyph = row->glyphs[TEXT_AREA]; | |
19296 | end = glyph + row->used[TEXT_AREA]; | |
19297 | ||
19298 | /* Skip over glyphs not having an object at the start of the row. | |
19299 | These are special glyphs like truncation marks on terminal | |
19300 | frames. */ | |
19301 | if (row->displays_text_p) | |
19302 | while (glyph < end | |
19303 | && INTEGERP (glyph->object) | |
19304 | && !EQ (stop, glyph->object) | |
19305 | && glyph->charpos < 0) | |
19306 | { | |
19307 | *x += glyph->pixel_width; | |
19308 | ++glyph; | |
19309 | } | |
19310 | ||
19311 | while (glyph < end | |
19312 | && !INTEGERP (glyph->object) | |
19313 | && !EQ (stop, glyph->object) | |
19314 | && (!BUFFERP (glyph->object) | |
19315 | || glyph->charpos < charpos)) | |
19316 | { | |
19317 | *x += glyph->pixel_width; | |
19318 | ++glyph; | |
19319 | } | |
19320 | ||
19321 | *hpos = glyph - row->glyphs[TEXT_AREA]; | |
19322 | return past_end; | |
19323 | } | |
19324 | ||
9c3521e0 | 19325 | #else /* not 1 */ |
fa3c6b4d KS |
19326 | |
19327 | static int | |
19328 | fast_find_position (w, pos, hpos, vpos, x, y, stop) | |
19329 | struct window *w; | |
19330 | int pos; | |
19331 | int *hpos, *vpos, *x, *y; | |
19332 | Lisp_Object stop; | |
19333 | { | |
19334 | int i; | |
19335 | int lastcol; | |
19336 | int maybe_next_line_p = 0; | |
19337 | int line_start_position; | |
19338 | int yb = window_text_bottom_y (w); | |
19339 | struct glyph_row *row, *best_row; | |
19340 | int row_vpos, best_row_vpos; | |
19341 | int current_x; | |
19342 | ||
19343 | row = best_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
19344 | row_vpos = best_row_vpos = MATRIX_ROW_VPOS (row, w->current_matrix); | |
19345 | ||
19346 | while (row->y < yb) | |
19347 | { | |
19348 | if (row->used[TEXT_AREA]) | |
19349 | line_start_position = row->glyphs[TEXT_AREA]->charpos; | |
19350 | else | |
19351 | line_start_position = 0; | |
19352 | ||
19353 | if (line_start_position > pos) | |
19354 | break; | |
19355 | /* If the position sought is the end of the buffer, | |
19356 | don't include the blank lines at the bottom of the window. */ | |
19357 | else if (line_start_position == pos | |
19358 | && pos == BUF_ZV (XBUFFER (w->buffer))) | |
19359 | { | |
19360 | maybe_next_line_p = 1; | |
19361 | break; | |
19362 | } | |
19363 | else if (line_start_position > 0) | |
19364 | { | |
19365 | best_row = row; | |
19366 | best_row_vpos = row_vpos; | |
19367 | } | |
19368 | ||
19369 | if (row->y + row->height >= yb) | |
19370 | break; | |
19371 | ||
19372 | ++row; | |
19373 | ++row_vpos; | |
19374 | } | |
19375 | ||
19376 | /* Find the right column within BEST_ROW. */ | |
19377 | lastcol = 0; | |
19378 | current_x = best_row->x; | |
19379 | for (i = 0; i < best_row->used[TEXT_AREA]; i++) | |
19380 | { | |
19381 | struct glyph *glyph = best_row->glyphs[TEXT_AREA] + i; | |
19382 | int charpos = glyph->charpos; | |
19383 | ||
19384 | if (BUFFERP (glyph->object)) | |
19385 | { | |
19386 | if (charpos == pos) | |
19387 | { | |
19388 | *hpos = i; | |
19389 | *vpos = best_row_vpos; | |
19390 | *x = current_x; | |
19391 | *y = best_row->y; | |
19392 | return 1; | |
19393 | } | |
19394 | else if (charpos > pos) | |
19395 | break; | |
19396 | } | |
19397 | else if (EQ (glyph->object, stop)) | |
19398 | break; | |
19399 | ||
19400 | if (charpos > 0) | |
19401 | lastcol = i; | |
19402 | current_x += glyph->pixel_width; | |
19403 | } | |
19404 | ||
19405 | /* If we're looking for the end of the buffer, | |
19406 | and we didn't find it in the line we scanned, | |
19407 | use the start of the following line. */ | |
19408 | if (maybe_next_line_p) | |
19409 | { | |
19410 | ++best_row; | |
19411 | ++best_row_vpos; | |
19412 | lastcol = 0; | |
19413 | current_x = best_row->x; | |
19414 | } | |
19415 | ||
19416 | *vpos = best_row_vpos; | |
19417 | *hpos = lastcol + 1; | |
19418 | *x = current_x; | |
19419 | *y = best_row->y; | |
19420 | return 0; | |
19421 | } | |
19422 | ||
9c3521e0 | 19423 | #endif /* not 1 */ |
fa3c6b4d KS |
19424 | |
19425 | ||
19426 | /* Find the position of the glyph for position POS in OBJECT in | |
19427 | window W's current matrix, and return in *X, *Y the pixel | |
19428 | coordinates, and return in *HPOS, *VPOS the column/row of the glyph. | |
19429 | ||
19430 | RIGHT_P non-zero means return the position of the right edge of the | |
19431 | glyph, RIGHT_P zero means return the left edge position. | |
19432 | ||
19433 | If no glyph for POS exists in the matrix, return the position of | |
19434 | the glyph with the next smaller position that is in the matrix, if | |
19435 | RIGHT_P is zero. If RIGHT_P is non-zero, and no glyph for POS | |
19436 | exists in the matrix, return the position of the glyph with the | |
19437 | next larger position in OBJECT. | |
19438 | ||
19439 | Value is non-zero if a glyph was found. */ | |
19440 | ||
19441 | static int | |
19442 | fast_find_string_pos (w, pos, object, hpos, vpos, x, y, right_p) | |
19443 | struct window *w; | |
19444 | int pos; | |
19445 | Lisp_Object object; | |
19446 | int *hpos, *vpos, *x, *y; | |
19447 | int right_p; | |
19448 | { | |
19449 | int yb = window_text_bottom_y (w); | |
19450 | struct glyph_row *r; | |
19451 | struct glyph *best_glyph = NULL; | |
19452 | struct glyph_row *best_row = NULL; | |
19453 | int best_x = 0; | |
19454 | ||
19455 | for (r = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
19456 | r->enabled_p && r->y < yb; | |
19457 | ++r) | |
19458 | { | |
19459 | struct glyph *g = r->glyphs[TEXT_AREA]; | |
19460 | struct glyph *e = g + r->used[TEXT_AREA]; | |
19461 | int gx; | |
19462 | ||
19463 | for (gx = r->x; g < e; gx += g->pixel_width, ++g) | |
19464 | if (EQ (g->object, object)) | |
19465 | { | |
19466 | if (g->charpos == pos) | |
19467 | { | |
19468 | best_glyph = g; | |
19469 | best_x = gx; | |
19470 | best_row = r; | |
19471 | goto found; | |
19472 | } | |
19473 | else if (best_glyph == NULL | |
19474 | || ((abs (g->charpos - pos) | |
19475 | < abs (best_glyph->charpos - pos)) | |
19476 | && (right_p | |
19477 | ? g->charpos < pos | |
19478 | : g->charpos > pos))) | |
19479 | { | |
19480 | best_glyph = g; | |
19481 | best_x = gx; | |
19482 | best_row = r; | |
19483 | } | |
19484 | } | |
19485 | } | |
19486 | ||
19487 | found: | |
19488 | ||
19489 | if (best_glyph) | |
19490 | { | |
19491 | *x = best_x; | |
19492 | *hpos = best_glyph - best_row->glyphs[TEXT_AREA]; | |
19493 | ||
19494 | if (right_p) | |
19495 | { | |
19496 | *x += best_glyph->pixel_width; | |
19497 | ++*hpos; | |
19498 | } | |
19499 | ||
19500 | *y = best_row->y; | |
19501 | *vpos = best_row - w->current_matrix->rows; | |
19502 | } | |
19503 | ||
19504 | return best_glyph != NULL; | |
19505 | } | |
19506 | ||
19507 | ||
fa3c6b4d KS |
19508 | /* Take proper action when mouse has moved to the mode or header line |
19509 | or marginal area AREA of window W, x-position X and y-position Y. | |
19510 | X is relative to the start of the text display area of W, so the | |
19511 | width of bitmap areas and scroll bars must be subtracted to get a | |
19512 | position relative to the start of the mode line. */ | |
19513 | ||
19514 | static void | |
19515 | note_mode_line_or_margin_highlight (w, x, y, area) | |
19516 | struct window *w; | |
19517 | int x, y; | |
19518 | enum window_part area; | |
19519 | { | |
19520 | struct frame *f = XFRAME (w->frame); | |
19521 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
19522 | Cursor cursor = dpyinfo->vertical_scroll_bar_cursor; | |
19523 | int charpos; | |
19524 | Lisp_Object string, help, map, pos; | |
19525 | ||
19526 | if (area == ON_MODE_LINE || area == ON_HEADER_LINE) | |
19527 | string = mode_line_string (w, x, y, area, &charpos); | |
19528 | else | |
19529 | string = marginal_area_string (w, x, y, area, &charpos); | |
19530 | ||
19531 | if (STRINGP (string)) | |
19532 | { | |
19533 | pos = make_number (charpos); | |
19534 | ||
19535 | /* If we're on a string with `help-echo' text property, arrange | |
19536 | for the help to be displayed. This is done by setting the | |
19537 | global variable help_echo_string to the help string. */ | |
19538 | help = Fget_text_property (pos, Qhelp_echo, string); | |
19539 | if (!NILP (help)) | |
19540 | { | |
19541 | help_echo_string = help; | |
19542 | XSETWINDOW (help_echo_window, w); | |
19543 | help_echo_object = string; | |
19544 | help_echo_pos = charpos; | |
19545 | } | |
19546 | ||
19547 | /* Change the mouse pointer according to what is under X/Y. */ | |
19548 | map = Fget_text_property (pos, Qlocal_map, string); | |
19549 | if (!KEYMAPP (map)) | |
19550 | map = Fget_text_property (pos, Qkeymap, string); | |
19551 | if (KEYMAPP (map)) | |
19552 | cursor = FRAME_X_OUTPUT (f)->nontext_cursor; | |
19553 | } | |
19554 | ||
19555 | rif->define_frame_cursor (f, cursor); | |
19556 | } | |
19557 | ||
fa3c6b4d KS |
19558 | |
19559 | /* EXPORT: | |
19560 | Take proper action when the mouse has moved to position X, Y on | |
19561 | frame F as regards highlighting characters that have mouse-face | |
19562 | properties. Also de-highlighting chars where the mouse was before. | |
19563 | X and Y can be negative or out of range. */ | |
19564 | ||
19565 | void | |
19566 | note_mouse_highlight (f, x, y) | |
19567 | struct frame *f; | |
19568 | int x, y; | |
19569 | { | |
19570 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
19571 | enum window_part part; | |
19572 | Lisp_Object window; | |
19573 | struct window *w; | |
19574 | Cursor cursor = No_Cursor; | |
19575 | struct buffer *b; | |
19576 | ||
19577 | /* When a menu is active, don't highlight because this looks odd. */ | |
19578 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) || defined (HAVE_NTGUI) | |
19579 | if (popup_activated ()) | |
19580 | return; | |
19581 | #endif | |
19582 | ||
19583 | if (NILP (Vmouse_highlight) | |
19584 | || !f->glyphs_initialized_p) | |
19585 | return; | |
19586 | ||
19587 | dpyinfo->mouse_face_mouse_x = x; | |
19588 | dpyinfo->mouse_face_mouse_y = y; | |
19589 | dpyinfo->mouse_face_mouse_frame = f; | |
19590 | ||
19591 | if (dpyinfo->mouse_face_defer) | |
19592 | return; | |
19593 | ||
19594 | if (gc_in_progress) | |
19595 | { | |
19596 | dpyinfo->mouse_face_deferred_gc = 1; | |
19597 | return; | |
19598 | } | |
19599 | ||
19600 | /* Which window is that in? */ | |
da8b7f4f | 19601 | window = window_from_coordinates (f, x, y, &part, 0, 0, 1); |
fa3c6b4d KS |
19602 | |
19603 | /* If we were displaying active text in another window, clear that. */ | |
19604 | if (! EQ (window, dpyinfo->mouse_face_window)) | |
19605 | clear_mouse_face (dpyinfo); | |
19606 | ||
19607 | /* Not on a window -> return. */ | |
19608 | if (!WINDOWP (window)) | |
19609 | return; | |
19610 | ||
19611 | /* Reset help_echo_string. It will get recomputed below. */ | |
19612 | /* ++KFS: X version didn't do this, but it looks harmless. */ | |
19613 | help_echo_string = Qnil; | |
19614 | ||
19615 | /* Convert to window-relative pixel coordinates. */ | |
19616 | w = XWINDOW (window); | |
19617 | frame_to_window_pixel_xy (w, &x, &y); | |
19618 | ||
19619 | /* Handle tool-bar window differently since it doesn't display a | |
19620 | buffer. */ | |
19621 | if (EQ (window, f->tool_bar_window)) | |
19622 | { | |
19623 | note_tool_bar_highlight (f, x, y); | |
19624 | return; | |
19625 | } | |
19626 | ||
fa3c6b4d KS |
19627 | /* Mouse is on the mode, header line or margin? */ |
19628 | if (part == ON_MODE_LINE || part == ON_HEADER_LINE | |
19629 | || part == ON_LEFT_MARGIN || part == ON_RIGHT_MARGIN) | |
19630 | { | |
19631 | note_mode_line_or_margin_highlight (w, x, y, part); | |
19632 | return; | |
19633 | } | |
fa3c6b4d KS |
19634 | |
19635 | if (part == ON_VERTICAL_BORDER) | |
19636 | cursor = FRAME_X_OUTPUT (f)->horizontal_drag_cursor; | |
19637 | else | |
19638 | cursor = FRAME_X_OUTPUT (f)->text_cursor; | |
19639 | ||
19640 | /* Are we in a window whose display is up to date? | |
19641 | And verify the buffer's text has not changed. */ | |
19642 | b = XBUFFER (w->buffer); | |
19643 | if (part == ON_TEXT | |
19644 | && EQ (w->window_end_valid, w->buffer) | |
19645 | && XFASTINT (w->last_modified) == BUF_MODIFF (b) | |
19646 | && XFASTINT (w->last_overlay_modified) == BUF_OVERLAY_MODIFF (b)) | |
19647 | { | |
19648 | int hpos, vpos, pos, i, area; | |
19649 | struct glyph *glyph; | |
19650 | Lisp_Object object; | |
19651 | Lisp_Object mouse_face = Qnil, overlay = Qnil, position; | |
19652 | Lisp_Object *overlay_vec = NULL; | |
19653 | int len, noverlays; | |
19654 | struct buffer *obuf; | |
19655 | int obegv, ozv, same_region; | |
19656 | ||
19657 | /* Find the glyph under X/Y. */ | |
19658 | glyph = x_y_to_hpos_vpos (w, x, y, &hpos, &vpos, &area, 0); | |
19659 | ||
19660 | /* Clear mouse face if X/Y not over text. */ | |
19661 | if (glyph == NULL | |
19662 | || area != TEXT_AREA | |
19663 | || !MATRIX_ROW (w->current_matrix, vpos)->displays_text_p) | |
19664 | { | |
19665 | #if defined (HAVE_NTGUI) | |
19666 | /* ++KFS: Why is this necessary on W32 ? */ | |
19667 | clear_mouse_face (dpyinfo); | |
19668 | cursor = FRAME_X_OUTPUT (f)->nontext_cursor; | |
19669 | #else | |
19670 | if (clear_mouse_face (dpyinfo)) | |
19671 | cursor = No_Cursor; | |
19672 | #endif | |
19673 | goto set_cursor; | |
19674 | } | |
19675 | ||
19676 | pos = glyph->charpos; | |
19677 | object = glyph->object; | |
19678 | if (!STRINGP (object) && !BUFFERP (object)) | |
19679 | goto set_cursor; | |
19680 | ||
19681 | /* If we get an out-of-range value, return now; avoid an error. */ | |
19682 | if (BUFFERP (object) && pos > BUF_Z (b)) | |
19683 | goto set_cursor; | |
19684 | ||
19685 | /* Make the window's buffer temporarily current for | |
19686 | overlays_at and compute_char_face. */ | |
19687 | obuf = current_buffer; | |
19688 | current_buffer = b; | |
19689 | obegv = BEGV; | |
19690 | ozv = ZV; | |
19691 | BEGV = BEG; | |
19692 | ZV = Z; | |
19693 | ||
19694 | /* Is this char mouse-active or does it have help-echo? */ | |
19695 | position = make_number (pos); | |
19696 | ||
19697 | if (BUFFERP (object)) | |
19698 | { | |
19699 | /* Put all the overlays we want in a vector in overlay_vec. | |
19700 | Store the length in len. If there are more than 10, make | |
19701 | enough space for all, and try again. */ | |
19702 | len = 10; | |
19703 | overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object)); | |
19704 | noverlays = overlays_at (pos, 0, &overlay_vec, &len, NULL, NULL, 0); | |
19705 | if (noverlays > len) | |
19706 | { | |
19707 | len = noverlays; | |
19708 | overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object)); | |
19709 | noverlays = overlays_at (pos, 0, &overlay_vec, &len, NULL, NULL,0); | |
19710 | } | |
19711 | ||
19712 | /* Sort overlays into increasing priority order. */ | |
19713 | noverlays = sort_overlays (overlay_vec, noverlays, w); | |
19714 | } | |
19715 | else | |
19716 | noverlays = 0; | |
19717 | ||
19718 | same_region = (EQ (window, dpyinfo->mouse_face_window) | |
19719 | && vpos >= dpyinfo->mouse_face_beg_row | |
19720 | && vpos <= dpyinfo->mouse_face_end_row | |
19721 | && (vpos > dpyinfo->mouse_face_beg_row | |
19722 | || hpos >= dpyinfo->mouse_face_beg_col) | |
19723 | && (vpos < dpyinfo->mouse_face_end_row | |
19724 | || hpos < dpyinfo->mouse_face_end_col | |
19725 | || dpyinfo->mouse_face_past_end)); | |
19726 | ||
19727 | if (same_region) | |
19728 | cursor = No_Cursor; | |
19729 | ||
19730 | /* Check mouse-face highlighting. */ | |
19731 | if (! same_region | |
19732 | /* If there exists an overlay with mouse-face overlapping | |
19733 | the one we are currently highlighting, we have to | |
19734 | check if we enter the overlapping overlay, and then | |
19735 | highlight only that. */ | |
19736 | || (OVERLAYP (dpyinfo->mouse_face_overlay) | |
19737 | && mouse_face_overlay_overlaps (dpyinfo->mouse_face_overlay))) | |
19738 | { | |
19739 | /* Find the highest priority overlay that has a mouse-face | |
19740 | property. */ | |
19741 | overlay = Qnil; | |
19742 | for (i = noverlays - 1; i >= 0 && NILP (overlay); --i) | |
19743 | { | |
19744 | mouse_face = Foverlay_get (overlay_vec[i], Qmouse_face); | |
19745 | if (!NILP (mouse_face)) | |
19746 | overlay = overlay_vec[i]; | |
19747 | } | |
19748 | ||
19749 | /* If we're actually highlighting the same overlay as | |
19750 | before, there's no need to do that again. */ | |
19751 | if (!NILP (overlay) | |
19752 | && EQ (overlay, dpyinfo->mouse_face_overlay)) | |
19753 | goto check_help_echo; | |
19754 | ||
19755 | dpyinfo->mouse_face_overlay = overlay; | |
19756 | ||
19757 | /* Clear the display of the old active region, if any. */ | |
19758 | if (clear_mouse_face (dpyinfo)) | |
19759 | cursor = No_Cursor; | |
19760 | ||
19761 | /* If no overlay applies, get a text property. */ | |
19762 | if (NILP (overlay)) | |
19763 | mouse_face = Fget_text_property (position, Qmouse_face, object); | |
19764 | ||
19765 | /* Handle the overlay case. */ | |
19766 | if (!NILP (overlay)) | |
19767 | { | |
19768 | /* Find the range of text around this char that | |
19769 | should be active. */ | |
19770 | Lisp_Object before, after; | |
19771 | int ignore; | |
19772 | ||
19773 | before = Foverlay_start (overlay); | |
19774 | after = Foverlay_end (overlay); | |
19775 | /* Record this as the current active region. */ | |
19776 | fast_find_position (w, XFASTINT (before), | |
19777 | &dpyinfo->mouse_face_beg_col, | |
19778 | &dpyinfo->mouse_face_beg_row, | |
19779 | &dpyinfo->mouse_face_beg_x, | |
19780 | &dpyinfo->mouse_face_beg_y, Qnil); | |
19781 | ||
19782 | dpyinfo->mouse_face_past_end | |
19783 | = !fast_find_position (w, XFASTINT (after), | |
19784 | &dpyinfo->mouse_face_end_col, | |
19785 | &dpyinfo->mouse_face_end_row, | |
19786 | &dpyinfo->mouse_face_end_x, | |
19787 | &dpyinfo->mouse_face_end_y, Qnil); | |
19788 | dpyinfo->mouse_face_window = window; | |
19789 | ||
19790 | dpyinfo->mouse_face_face_id | |
19791 | = face_at_buffer_position (w, pos, 0, 0, | |
19792 | &ignore, pos + 1, | |
19793 | !dpyinfo->mouse_face_hidden); | |
19794 | ||
19795 | /* Display it as active. */ | |
19796 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
19797 | cursor = No_Cursor; | |
19798 | } | |
19799 | /* Handle the text property case. */ | |
19800 | else if (!NILP (mouse_face) && BUFFERP (object)) | |
19801 | { | |
19802 | /* Find the range of text around this char that | |
19803 | should be active. */ | |
19804 | Lisp_Object before, after, beginning, end; | |
19805 | int ignore; | |
19806 | ||
19807 | beginning = Fmarker_position (w->start); | |
19808 | end = make_number (BUF_Z (XBUFFER (object)) | |
19809 | - XFASTINT (w->window_end_pos)); | |
19810 | before | |
19811 | = Fprevious_single_property_change (make_number (pos + 1), | |
19812 | Qmouse_face, | |
19813 | object, beginning); | |
19814 | after | |
19815 | = Fnext_single_property_change (position, Qmouse_face, | |
19816 | object, end); | |
19817 | ||
19818 | /* Record this as the current active region. */ | |
19819 | fast_find_position (w, XFASTINT (before), | |
19820 | &dpyinfo->mouse_face_beg_col, | |
19821 | &dpyinfo->mouse_face_beg_row, | |
19822 | &dpyinfo->mouse_face_beg_x, | |
19823 | &dpyinfo->mouse_face_beg_y, Qnil); | |
19824 | dpyinfo->mouse_face_past_end | |
19825 | = !fast_find_position (w, XFASTINT (after), | |
19826 | &dpyinfo->mouse_face_end_col, | |
19827 | &dpyinfo->mouse_face_end_row, | |
19828 | &dpyinfo->mouse_face_end_x, | |
19829 | &dpyinfo->mouse_face_end_y, Qnil); | |
19830 | dpyinfo->mouse_face_window = window; | |
19831 | ||
19832 | if (BUFFERP (object)) | |
19833 | dpyinfo->mouse_face_face_id | |
19834 | = face_at_buffer_position (w, pos, 0, 0, | |
19835 | &ignore, pos + 1, | |
19836 | !dpyinfo->mouse_face_hidden); | |
19837 | ||
19838 | /* Display it as active. */ | |
19839 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
19840 | cursor = No_Cursor; | |
19841 | } | |
19842 | else if (!NILP (mouse_face) && STRINGP (object)) | |
19843 | { | |
19844 | Lisp_Object b, e; | |
19845 | int ignore; | |
19846 | ||
19847 | b = Fprevious_single_property_change (make_number (pos + 1), | |
19848 | Qmouse_face, | |
19849 | object, Qnil); | |
19850 | e = Fnext_single_property_change (position, Qmouse_face, | |
19851 | object, Qnil); | |
19852 | if (NILP (b)) | |
19853 | b = make_number (0); | |
19854 | if (NILP (e)) | |
19855 | e = make_number (SCHARS (object) - 1); | |
19856 | fast_find_string_pos (w, XINT (b), object, | |
19857 | &dpyinfo->mouse_face_beg_col, | |
19858 | &dpyinfo->mouse_face_beg_row, | |
19859 | &dpyinfo->mouse_face_beg_x, | |
19860 | &dpyinfo->mouse_face_beg_y, 0); | |
19861 | fast_find_string_pos (w, XINT (e), object, | |
19862 | &dpyinfo->mouse_face_end_col, | |
19863 | &dpyinfo->mouse_face_end_row, | |
19864 | &dpyinfo->mouse_face_end_x, | |
19865 | &dpyinfo->mouse_face_end_y, 1); | |
19866 | dpyinfo->mouse_face_past_end = 0; | |
19867 | dpyinfo->mouse_face_window = window; | |
19868 | dpyinfo->mouse_face_face_id | |
19869 | = face_at_string_position (w, object, pos, 0, 0, 0, &ignore, | |
19870 | glyph->face_id, 1); | |
19871 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
19872 | cursor = No_Cursor; | |
19873 | } | |
19874 | else if (STRINGP (object) && NILP (mouse_face)) | |
19875 | { | |
19876 | /* A string which doesn't have mouse-face, but | |
19877 | the text ``under'' it might have. */ | |
19878 | struct glyph_row *r = MATRIX_ROW (w->current_matrix, vpos); | |
19879 | int start = MATRIX_ROW_START_CHARPOS (r); | |
19880 | ||
19881 | pos = string_buffer_position (w, object, start); | |
19882 | if (pos > 0) | |
19883 | mouse_face = get_char_property_and_overlay (make_number (pos), | |
19884 | Qmouse_face, | |
19885 | w->buffer, | |
19886 | &overlay); | |
19887 | if (!NILP (mouse_face) && !NILP (overlay)) | |
19888 | { | |
19889 | Lisp_Object before = Foverlay_start (overlay); | |
19890 | Lisp_Object after = Foverlay_end (overlay); | |
19891 | int ignore; | |
19892 | ||
19893 | /* Note that we might not be able to find position | |
19894 | BEFORE in the glyph matrix if the overlay is | |
19895 | entirely covered by a `display' property. In | |
19896 | this case, we overshoot. So let's stop in | |
19897 | the glyph matrix before glyphs for OBJECT. */ | |
19898 | fast_find_position (w, XFASTINT (before), | |
19899 | &dpyinfo->mouse_face_beg_col, | |
19900 | &dpyinfo->mouse_face_beg_row, | |
19901 | &dpyinfo->mouse_face_beg_x, | |
19902 | &dpyinfo->mouse_face_beg_y, | |
19903 | object); | |
19904 | ||
19905 | dpyinfo->mouse_face_past_end | |
19906 | = !fast_find_position (w, XFASTINT (after), | |
19907 | &dpyinfo->mouse_face_end_col, | |
19908 | &dpyinfo->mouse_face_end_row, | |
19909 | &dpyinfo->mouse_face_end_x, | |
19910 | &dpyinfo->mouse_face_end_y, | |
19911 | Qnil); | |
19912 | dpyinfo->mouse_face_window = window; | |
19913 | dpyinfo->mouse_face_face_id | |
19914 | = face_at_buffer_position (w, pos, 0, 0, | |
19915 | &ignore, pos + 1, | |
19916 | !dpyinfo->mouse_face_hidden); | |
19917 | ||
19918 | /* Display it as active. */ | |
19919 | show_mouse_face (dpyinfo, DRAW_MOUSE_FACE); | |
19920 | cursor = No_Cursor; | |
19921 | } | |
19922 | } | |
19923 | } | |
19924 | ||
19925 | check_help_echo: | |
19926 | ||
19927 | /* Look for a `help-echo' property. */ | |
19928 | { | |
19929 | Lisp_Object help, overlay; | |
19930 | ||
19931 | /* Check overlays first. */ | |
19932 | help = overlay = Qnil; | |
19933 | for (i = noverlays - 1; i >= 0 && NILP (help); --i) | |
19934 | { | |
19935 | overlay = overlay_vec[i]; | |
19936 | help = Foverlay_get (overlay, Qhelp_echo); | |
19937 | } | |
19938 | ||
19939 | if (!NILP (help)) | |
19940 | { | |
19941 | help_echo_string = help; | |
19942 | help_echo_window = window; | |
19943 | help_echo_object = overlay; | |
19944 | help_echo_pos = pos; | |
19945 | } | |
19946 | else | |
19947 | { | |
19948 | Lisp_Object object = glyph->object; | |
19949 | int charpos = glyph->charpos; | |
19950 | ||
19951 | /* Try text properties. */ | |
19952 | if (STRINGP (object) | |
19953 | && charpos >= 0 | |
19954 | && charpos < SCHARS (object)) | |
19955 | { | |
19956 | help = Fget_text_property (make_number (charpos), | |
19957 | Qhelp_echo, object); | |
19958 | if (NILP (help)) | |
19959 | { | |
19960 | /* If the string itself doesn't specify a help-echo, | |
19961 | see if the buffer text ``under'' it does. */ | |
19962 | struct glyph_row *r | |
19963 | = MATRIX_ROW (w->current_matrix, vpos); | |
19964 | int start = MATRIX_ROW_START_CHARPOS (r); | |
19965 | int pos = string_buffer_position (w, object, start); | |
19966 | if (pos > 0) | |
19967 | { | |
19968 | help = Fget_char_property (make_number (pos), | |
19969 | Qhelp_echo, w->buffer); | |
19970 | if (!NILP (help)) | |
19971 | { | |
19972 | charpos = pos; | |
19973 | object = w->buffer; | |
19974 | } | |
19975 | } | |
19976 | } | |
19977 | } | |
19978 | else if (BUFFERP (object) | |
19979 | && charpos >= BEGV | |
19980 | && charpos < ZV) | |
19981 | help = Fget_text_property (make_number (charpos), Qhelp_echo, | |
19982 | object); | |
19983 | ||
19984 | if (!NILP (help)) | |
19985 | { | |
19986 | help_echo_string = help; | |
19987 | help_echo_window = window; | |
19988 | help_echo_object = object; | |
19989 | help_echo_pos = charpos; | |
19990 | } | |
19991 | } | |
19992 | } | |
19993 | ||
19994 | BEGV = obegv; | |
19995 | ZV = ozv; | |
19996 | current_buffer = obuf; | |
19997 | } | |
19998 | ||
19999 | set_cursor: | |
20000 | ||
365fa1b3 | 20001 | #ifndef HAVE_CARBON |
fa3c6b4d | 20002 | if (cursor != No_Cursor) |
365fa1b3 AC |
20003 | #else |
20004 | if (bcmp (&cursor, &No_Cursor, sizeof (Cursor))) | |
20005 | #endif | |
fa3c6b4d KS |
20006 | rif->define_frame_cursor (f, cursor); |
20007 | } | |
20008 | ||
20009 | ||
20010 | /* EXPORT for RIF: | |
20011 | Clear any mouse-face on window W. This function is part of the | |
20012 | redisplay interface, and is called from try_window_id and similar | |
20013 | functions to ensure the mouse-highlight is off. */ | |
20014 | ||
20015 | void | |
20016 | x_clear_window_mouse_face (w) | |
20017 | struct window *w; | |
20018 | { | |
20019 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (XFRAME (w->frame)); | |
20020 | Lisp_Object window; | |
20021 | ||
20022 | BLOCK_INPUT; | |
20023 | XSETWINDOW (window, w); | |
20024 | if (EQ (window, dpyinfo->mouse_face_window)) | |
20025 | clear_mouse_face (dpyinfo); | |
20026 | UNBLOCK_INPUT; | |
20027 | } | |
20028 | ||
20029 | ||
20030 | /* EXPORT: | |
20031 | Just discard the mouse face information for frame F, if any. | |
20032 | This is used when the size of F is changed. */ | |
20033 | ||
20034 | void | |
20035 | cancel_mouse_face (f) | |
20036 | struct frame *f; | |
20037 | { | |
20038 | Lisp_Object window; | |
20039 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
20040 | ||
20041 | window = dpyinfo->mouse_face_window; | |
20042 | if (! NILP (window) && XFRAME (XWINDOW (window)->frame) == f) | |
20043 | { | |
20044 | dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1; | |
20045 | dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1; | |
20046 | dpyinfo->mouse_face_window = Qnil; | |
20047 | } | |
20048 | } | |
20049 | ||
20050 | ||
20051 | #endif /* HAVE_WINDOW_SYSTEM */ | |
20052 | ||
20053 | \f | |
20054 | /*********************************************************************** | |
20055 | Exposure Events | |
20056 | ***********************************************************************/ | |
20057 | ||
20058 | #ifdef HAVE_WINDOW_SYSTEM | |
20059 | ||
20060 | /* Redraw the part of glyph row area AREA of glyph row ROW on window W | |
20061 | which intersects rectangle R. R is in window-relative coordinates. */ | |
20062 | ||
20063 | static void | |
20064 | expose_area (w, row, r, area) | |
20065 | struct window *w; | |
20066 | struct glyph_row *row; | |
20067 | XRectangle *r; | |
20068 | enum glyph_row_area area; | |
20069 | { | |
20070 | struct glyph *first = row->glyphs[area]; | |
20071 | struct glyph *end = row->glyphs[area] + row->used[area]; | |
20072 | struct glyph *last; | |
20073 | int first_x, start_x, x; | |
20074 | ||
20075 | if (area == TEXT_AREA && row->fill_line_p) | |
20076 | /* If row extends face to end of line write the whole line. */ | |
20077 | draw_glyphs (w, 0, row, area, | |
20078 | 0, row->used[area], | |
20079 | DRAW_NORMAL_TEXT, 0); | |
20080 | else | |
20081 | { | |
20082 | /* Set START_X to the window-relative start position for drawing glyphs of | |
20083 | AREA. The first glyph of the text area can be partially visible. | |
20084 | The first glyphs of other areas cannot. */ | |
da8b7f4f KS |
20085 | start_x = window_box_left_offset (w, area); |
20086 | if (area == TEXT_AREA) | |
20087 | start_x += row->x; | |
fa3c6b4d KS |
20088 | x = start_x; |
20089 | ||
20090 | /* Find the first glyph that must be redrawn. */ | |
20091 | while (first < end | |
20092 | && x + first->pixel_width < r->x) | |
20093 | { | |
20094 | x += first->pixel_width; | |
20095 | ++first; | |
20096 | } | |
20097 | ||
20098 | /* Find the last one. */ | |
20099 | last = first; | |
20100 | first_x = x; | |
20101 | while (last < end | |
20102 | && x < r->x + r->width) | |
20103 | { | |
20104 | x += last->pixel_width; | |
20105 | ++last; | |
20106 | } | |
20107 | ||
20108 | /* Repaint. */ | |
20109 | if (last > first) | |
20110 | draw_glyphs (w, first_x - start_x, row, area, | |
20111 | first - row->glyphs[area], last - row->glyphs[area], | |
20112 | DRAW_NORMAL_TEXT, 0); | |
20113 | } | |
20114 | } | |
20115 | ||
20116 | ||
20117 | /* Redraw the parts of the glyph row ROW on window W intersecting | |
20118 | rectangle R. R is in window-relative coordinates. Value is | |
20119 | non-zero if mouse-face was overwritten. */ | |
20120 | ||
20121 | static int | |
20122 | expose_line (w, row, r) | |
20123 | struct window *w; | |
20124 | struct glyph_row *row; | |
20125 | XRectangle *r; | |
20126 | { | |
20127 | xassert (row->enabled_p); | |
20128 | ||
20129 | if (row->mode_line_p || w->pseudo_window_p) | |
20130 | draw_glyphs (w, 0, row, TEXT_AREA, | |
20131 | 0, row->used[TEXT_AREA], | |
20132 | DRAW_NORMAL_TEXT, 0); | |
20133 | else | |
20134 | { | |
20135 | if (row->used[LEFT_MARGIN_AREA]) | |
20136 | expose_area (w, row, r, LEFT_MARGIN_AREA); | |
20137 | if (row->used[TEXT_AREA]) | |
20138 | expose_area (w, row, r, TEXT_AREA); | |
20139 | if (row->used[RIGHT_MARGIN_AREA]) | |
20140 | expose_area (w, row, r, RIGHT_MARGIN_AREA); | |
20141 | draw_row_fringe_bitmaps (w, row); | |
cfe03a41 KS |
20142 | } |
20143 | ||
fa3c6b4d KS |
20144 | return row->mouse_face_p; |
20145 | } | |
20146 | ||
20147 | ||
20148 | /* Redraw those parts of glyphs rows during expose event handling that | |
20149 | overlap other rows. Redrawing of an exposed line writes over parts | |
20150 | of lines overlapping that exposed line; this function fixes that. | |
20151 | ||
20152 | W is the window being exposed. FIRST_OVERLAPPING_ROW is the first | |
20153 | row in W's current matrix that is exposed and overlaps other rows. | |
20154 | LAST_OVERLAPPING_ROW is the last such row. */ | |
20155 | ||
20156 | static void | |
20157 | expose_overlaps (w, first_overlapping_row, last_overlapping_row) | |
20158 | struct window *w; | |
20159 | struct glyph_row *first_overlapping_row; | |
20160 | struct glyph_row *last_overlapping_row; | |
20161 | { | |
20162 | struct glyph_row *row; | |
20163 | ||
20164 | for (row = first_overlapping_row; row <= last_overlapping_row; ++row) | |
20165 | if (row->overlapping_p) | |
20166 | { | |
20167 | xassert (row->enabled_p && !row->mode_line_p); | |
20168 | ||
20169 | if (row->used[LEFT_MARGIN_AREA]) | |
20170 | x_fix_overlapping_area (w, row, LEFT_MARGIN_AREA); | |
cfe03a41 | 20171 | |
fa3c6b4d KS |
20172 | if (row->used[TEXT_AREA]) |
20173 | x_fix_overlapping_area (w, row, TEXT_AREA); | |
20174 | ||
20175 | if (row->used[RIGHT_MARGIN_AREA]) | |
20176 | x_fix_overlapping_area (w, row, RIGHT_MARGIN_AREA); | |
20177 | } | |
20178 | } | |
20179 | ||
20180 | ||
20181 | /* Return non-zero if W's cursor intersects rectangle R. */ | |
20182 | ||
20183 | static int | |
20184 | phys_cursor_in_rect_p (w, r) | |
20185 | struct window *w; | |
20186 | XRectangle *r; | |
20187 | { | |
20188 | XRectangle cr, result; | |
20189 | struct glyph *cursor_glyph; | |
20190 | ||
20191 | cursor_glyph = get_phys_cursor_glyph (w); | |
20192 | if (cursor_glyph) | |
cfe03a41 | 20193 | { |
aecf50d2 KS |
20194 | /* r is relative to W's box, but w->phys_cursor.x is relative |
20195 | to left edge of W's TEXT area. Adjust it. */ | |
20196 | cr.x = window_box_left_offset (w, TEXT_AREA) + w->phys_cursor.x; | |
fa3c6b4d KS |
20197 | cr.y = w->phys_cursor.y; |
20198 | cr.width = cursor_glyph->pixel_width; | |
20199 | cr.height = w->phys_cursor_height; | |
20200 | /* ++KFS: W32 version used W32-specific IntersectRect here, but | |
20201 | I assume the effect is the same -- and this is portable. */ | |
20202 | return x_intersect_rectangles (&cr, r, &result); | |
cfe03a41 | 20203 | } |
fa3c6b4d KS |
20204 | else |
20205 | return 0; | |
20206 | } | |
cfe03a41 | 20207 | |
cfe03a41 | 20208 | |
fa3c6b4d KS |
20209 | /* EXPORT: |
20210 | Draw a vertical window border to the right of window W if W doesn't | |
20211 | have vertical scroll bars. */ | |
cfe03a41 | 20212 | |
cfe03a41 | 20213 | void |
fa3c6b4d KS |
20214 | x_draw_vertical_border (w) |
20215 | struct window *w; | |
cfe03a41 | 20216 | { |
da8b7f4f KS |
20217 | /* We could do better, if we knew what type of scroll-bar the adjacent |
20218 | windows (on either side) have... But we don't :-( | |
20219 | However, I think this works ok. ++KFS 2003-04-25 */ | |
20220 | ||
fa3c6b4d KS |
20221 | /* Redraw borders between horizontally adjacent windows. Don't |
20222 | do it for frames with vertical scroll bars because either the | |
20223 | right scroll bar of a window, or the left scroll bar of its | |
20224 | neighbor will suffice as a border. */ | |
20225 | if (!WINDOW_RIGHTMOST_P (w) | |
da8b7f4f | 20226 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_RIGHT (w)) |
fa3c6b4d KS |
20227 | { |
20228 | int x0, x1, y0, y1; | |
cfe03a41 | 20229 | |
fa3c6b4d | 20230 | window_box_edges (w, -1, &x0, &y0, &x1, &y1); |
fa3c6b4d | 20231 | y1 -= 1; |
cfe03a41 | 20232 | |
fa3c6b4d | 20233 | rif->draw_vertical_window_border (w, x1, y0, y1); |
cfe03a41 | 20234 | } |
da8b7f4f KS |
20235 | else if (!WINDOW_LEFTMOST_P (w) |
20236 | && !WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w)) | |
20237 | { | |
20238 | int x0, x1, y0, y1; | |
20239 | ||
20240 | window_box_edges (w, -1, &x0, &y0, &x1, &y1); | |
20241 | y1 -= 1; | |
20242 | ||
20243 | rif->draw_vertical_window_border (w, x0, y0, y1); | |
20244 | } | |
cfe03a41 KS |
20245 | } |
20246 | ||
20247 | ||
fa3c6b4d KS |
20248 | /* Redraw the part of window W intersection rectangle FR. Pixel |
20249 | coordinates in FR are frame-relative. Call this function with | |
20250 | input blocked. Value is non-zero if the exposure overwrites | |
20251 | mouse-face. */ | |
cfe03a41 | 20252 | |
fa3c6b4d KS |
20253 | static int |
20254 | expose_window (w, fr) | |
cfe03a41 | 20255 | struct window *w; |
fa3c6b4d | 20256 | XRectangle *fr; |
cfe03a41 KS |
20257 | { |
20258 | struct frame *f = XFRAME (w->frame); | |
fa3c6b4d KS |
20259 | XRectangle wr, r; |
20260 | int mouse_face_overwritten_p = 0; | |
20261 | ||
20262 | /* If window is not yet fully initialized, do nothing. This can | |
20263 | happen when toolkit scroll bars are used and a window is split. | |
20264 | Reconfiguring the scroll bar will generate an expose for a newly | |
20265 | created window. */ | |
20266 | if (w->current_matrix == NULL) | |
20267 | return 0; | |
cfe03a41 | 20268 | |
fa3c6b4d KS |
20269 | /* When we're currently updating the window, display and current |
20270 | matrix usually don't agree. Arrange for a thorough display | |
20271 | later. */ | |
20272 | if (w == updated_window) | |
20273 | { | |
20274 | SET_FRAME_GARBAGED (f); | |
20275 | return 0; | |
20276 | } | |
e9c99027 | 20277 | |
fa3c6b4d | 20278 | /* Frame-relative pixel rectangle of W. */ |
da8b7f4f KS |
20279 | wr.x = WINDOW_LEFT_EDGE_X (w); |
20280 | wr.y = WINDOW_TOP_EDGE_Y (w); | |
20281 | wr.width = WINDOW_TOTAL_WIDTH (w); | |
20282 | wr.height = WINDOW_TOTAL_HEIGHT (w); | |
fa3c6b4d KS |
20283 | |
20284 | if (x_intersect_rectangles (fr, &wr, &r)) | |
cfe03a41 | 20285 | { |
fa3c6b4d KS |
20286 | int yb = window_text_bottom_y (w); |
20287 | struct glyph_row *row; | |
20288 | int cursor_cleared_p; | |
20289 | struct glyph_row *first_overlapping_row, *last_overlapping_row; | |
20290 | ||
20291 | TRACE ((stderr, "expose_window (%d, %d, %d, %d)\n", | |
20292 | r.x, r.y, r.width, r.height)); | |
20293 | ||
20294 | /* Convert to window coordinates. */ | |
cc8549df KS |
20295 | r.x -= WINDOW_LEFT_EDGE_X (w); |
20296 | r.y -= WINDOW_TOP_EDGE_Y (w); | |
fa3c6b4d KS |
20297 | |
20298 | /* Turn off the cursor. */ | |
20299 | if (!w->pseudo_window_p | |
20300 | && phys_cursor_in_rect_p (w, &r)) | |
cfe03a41 | 20301 | { |
fa3c6b4d KS |
20302 | x_clear_cursor (w); |
20303 | cursor_cleared_p = 1; | |
cfe03a41 | 20304 | } |
fa3c6b4d KS |
20305 | else |
20306 | cursor_cleared_p = 0; | |
cfe03a41 | 20307 | |
fa3c6b4d KS |
20308 | /* Update lines intersecting rectangle R. */ |
20309 | first_overlapping_row = last_overlapping_row = NULL; | |
20310 | for (row = w->current_matrix->rows; | |
20311 | row->enabled_p; | |
20312 | ++row) | |
20313 | { | |
20314 | int y0 = row->y; | |
20315 | int y1 = MATRIX_ROW_BOTTOM_Y (row); | |
cfe03a41 | 20316 | |
fa3c6b4d KS |
20317 | if ((y0 >= r.y && y0 < r.y + r.height) |
20318 | || (y1 > r.y && y1 < r.y + r.height) | |
20319 | || (r.y >= y0 && r.y < y1) | |
20320 | || (r.y + r.height > y0 && r.y + r.height < y1)) | |
20321 | { | |
20322 | if (row->overlapping_p) | |
20323 | { | |
20324 | if (first_overlapping_row == NULL) | |
20325 | first_overlapping_row = row; | |
20326 | last_overlapping_row = row; | |
20327 | } | |
e9c99027 | 20328 | |
fa3c6b4d KS |
20329 | if (expose_line (w, row, &r)) |
20330 | mouse_face_overwritten_p = 1; | |
20331 | } | |
cfe03a41 | 20332 | |
fa3c6b4d KS |
20333 | if (y1 >= yb) |
20334 | break; | |
20335 | } | |
cfe03a41 | 20336 | |
fa3c6b4d KS |
20337 | /* Display the mode line if there is one. */ |
20338 | if (WINDOW_WANTS_MODELINE_P (w) | |
20339 | && (row = MATRIX_MODE_LINE_ROW (w->current_matrix), | |
20340 | row->enabled_p) | |
20341 | && row->y < r.y + r.height) | |
20342 | { | |
20343 | if (expose_line (w, row, &r)) | |
20344 | mouse_face_overwritten_p = 1; | |
20345 | } | |
cfe03a41 | 20346 | |
fa3c6b4d KS |
20347 | if (!w->pseudo_window_p) |
20348 | { | |
20349 | /* Fix the display of overlapping rows. */ | |
20350 | if (first_overlapping_row) | |
20351 | expose_overlaps (w, first_overlapping_row, last_overlapping_row); | |
20352 | ||
20353 | /* Draw border between windows. */ | |
20354 | x_draw_vertical_border (w); | |
20355 | ||
20356 | /* Turn the cursor on again. */ | |
20357 | if (cursor_cleared_p) | |
20358 | update_window_cursor (w, 1); | |
20359 | } | |
20360 | } | |
20361 | ||
20362 | #ifdef HAVE_CARBON | |
20363 | /* Display scroll bar for this window. */ | |
20364 | if (!NILP (w->vertical_scroll_bar)) | |
cfe03a41 | 20365 | { |
fa3c6b4d KS |
20366 | /* ++KFS: |
20367 | If this doesn't work here (maybe some header files are missing), | |
20368 | make a function in macterm.c and call it to do the job! */ | |
20369 | ControlHandle ch | |
20370 | = SCROLL_BAR_CONTROL_HANDLE (XSCROLL_BAR (w->vertical_scroll_bar)); | |
20371 | ||
20372 | Draw1Control (ch); | |
cfe03a41 | 20373 | } |
fa3c6b4d | 20374 | #endif |
cfe03a41 | 20375 | |
fa3c6b4d KS |
20376 | return mouse_face_overwritten_p; |
20377 | } | |
20378 | ||
20379 | ||
20380 | ||
20381 | /* Redraw (parts) of all windows in the window tree rooted at W that | |
20382 | intersect R. R contains frame pixel coordinates. Value is | |
20383 | non-zero if the exposure overwrites mouse-face. */ | |
20384 | ||
20385 | static int | |
20386 | expose_window_tree (w, r) | |
20387 | struct window *w; | |
20388 | XRectangle *r; | |
20389 | { | |
20390 | struct frame *f = XFRAME (w->frame); | |
20391 | int mouse_face_overwritten_p = 0; | |
20392 | ||
20393 | while (w && !FRAME_GARBAGED_P (f)) | |
cfe03a41 | 20394 | { |
fa3c6b4d KS |
20395 | if (!NILP (w->hchild)) |
20396 | mouse_face_overwritten_p | |
20397 | |= expose_window_tree (XWINDOW (w->hchild), r); | |
20398 | else if (!NILP (w->vchild)) | |
20399 | mouse_face_overwritten_p | |
20400 | |= expose_window_tree (XWINDOW (w->vchild), r); | |
20401 | else | |
20402 | mouse_face_overwritten_p |= expose_window (w, r); | |
20403 | ||
20404 | w = NILP (w->next) ? NULL : XWINDOW (w->next); | |
cfe03a41 | 20405 | } |
cfe03a41 | 20406 | |
fa3c6b4d KS |
20407 | return mouse_face_overwritten_p; |
20408 | } | |
cfe03a41 | 20409 | |
cfe03a41 | 20410 | |
fa3c6b4d KS |
20411 | /* EXPORT: |
20412 | Redisplay an exposed area of frame F. X and Y are the upper-left | |
20413 | corner of the exposed rectangle. W and H are width and height of | |
20414 | the exposed area. All are pixel values. W or H zero means redraw | |
20415 | the entire frame. */ | |
cfe03a41 | 20416 | |
fa3c6b4d KS |
20417 | void |
20418 | expose_frame (f, x, y, w, h) | |
20419 | struct frame *f; | |
20420 | int x, y, w, h; | |
20421 | { | |
20422 | XRectangle r; | |
20423 | int mouse_face_overwritten_p = 0; | |
20424 | ||
20425 | TRACE ((stderr, "expose_frame ")); | |
20426 | ||
20427 | /* No need to redraw if frame will be redrawn soon. */ | |
20428 | if (FRAME_GARBAGED_P (f)) | |
cfe03a41 | 20429 | { |
fa3c6b4d KS |
20430 | TRACE ((stderr, " garbaged\n")); |
20431 | return; | |
cfe03a41 | 20432 | } |
7d0393cf | 20433 | |
fa3c6b4d KS |
20434 | #ifdef HAVE_CARBON |
20435 | /* MAC_TODO: this is a kludge, but if scroll bars are not activated | |
20436 | or deactivated here, for unknown reasons, activated scroll bars | |
20437 | are shown in deactivated frames in some instances. */ | |
20438 | if (f == FRAME_MAC_DISPLAY_INFO (f)->x_focus_frame) | |
20439 | activate_scroll_bars (f); | |
20440 | else | |
20441 | deactivate_scroll_bars (f); | |
20442 | #endif | |
cfe03a41 | 20443 | |
fa3c6b4d KS |
20444 | /* If basic faces haven't been realized yet, there is no point in |
20445 | trying to redraw anything. This can happen when we get an expose | |
20446 | event while Emacs is starting, e.g. by moving another window. */ | |
20447 | if (FRAME_FACE_CACHE (f) == NULL | |
20448 | || FRAME_FACE_CACHE (f)->used < BASIC_FACE_ID_SENTINEL) | |
20449 | { | |
20450 | TRACE ((stderr, " no faces\n")); | |
20451 | return; | |
20452 | } | |
cfe03a41 | 20453 | |
fa3c6b4d | 20454 | if (w == 0 || h == 0) |
cfe03a41 | 20455 | { |
fa3c6b4d | 20456 | r.x = r.y = 0; |
da8b7f4f KS |
20457 | r.width = FRAME_COLUMN_WIDTH (f) * FRAME_COLS (f); |
20458 | r.height = FRAME_LINE_HEIGHT (f) * FRAME_LINES (f); | |
fa3c6b4d KS |
20459 | } |
20460 | else | |
20461 | { | |
20462 | r.x = x; | |
20463 | r.y = y; | |
20464 | r.width = w; | |
20465 | r.height = h; | |
cfe03a41 KS |
20466 | } |
20467 | ||
fa3c6b4d KS |
20468 | TRACE ((stderr, "(%d, %d, %d, %d)\n", r.x, r.y, r.width, r.height)); |
20469 | mouse_face_overwritten_p = expose_window_tree (XWINDOW (f->root_window), &r); | |
20470 | ||
20471 | if (WINDOWP (f->tool_bar_window)) | |
20472 | mouse_face_overwritten_p | |
20473 | |= expose_window (XWINDOW (f->tool_bar_window), &r); | |
20474 | ||
20475 | #ifdef HAVE_X_WINDOWS | |
20476 | #ifndef MSDOS | |
20477 | #ifndef USE_X_TOOLKIT | |
20478 | if (WINDOWP (f->menu_bar_window)) | |
20479 | mouse_face_overwritten_p | |
20480 | |= expose_window (XWINDOW (f->menu_bar_window), &r); | |
20481 | #endif /* not USE_X_TOOLKIT */ | |
20482 | #endif | |
20483 | #endif | |
20484 | ||
20485 | /* Some window managers support a focus-follows-mouse style with | |
20486 | delayed raising of frames. Imagine a partially obscured frame, | |
20487 | and moving the mouse into partially obscured mouse-face on that | |
20488 | frame. The visible part of the mouse-face will be highlighted, | |
20489 | then the WM raises the obscured frame. With at least one WM, KDE | |
20490 | 2.1, Emacs is not getting any event for the raising of the frame | |
20491 | (even tried with SubstructureRedirectMask), only Expose events. | |
20492 | These expose events will draw text normally, i.e. not | |
20493 | highlighted. Which means we must redo the highlight here. | |
20494 | Subsume it under ``we love X''. --gerd 2001-08-15 */ | |
20495 | /* Included in Windows version because Windows most likely does not | |
20496 | do the right thing if any third party tool offers | |
20497 | focus-follows-mouse with delayed raise. --jason 2001-10-12 */ | |
20498 | if (mouse_face_overwritten_p && !FRAME_GARBAGED_P (f)) | |
20499 | { | |
20500 | Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); | |
20501 | if (f == dpyinfo->mouse_face_mouse_frame) | |
20502 | { | |
20503 | int x = dpyinfo->mouse_face_mouse_x; | |
20504 | int y = dpyinfo->mouse_face_mouse_y; | |
20505 | clear_mouse_face (dpyinfo); | |
20506 | note_mouse_highlight (f, x, y); | |
20507 | } | |
20508 | } | |
cfe03a41 KS |
20509 | } |
20510 | ||
133c764e | 20511 | |
fa3c6b4d KS |
20512 | /* EXPORT: |
20513 | Determine the intersection of two rectangles R1 and R2. Return | |
20514 | the intersection in *RESULT. Value is non-zero if RESULT is not | |
20515 | empty. */ | |
133c764e | 20516 | |
fa3c6b4d KS |
20517 | int |
20518 | x_intersect_rectangles (r1, r2, result) | |
20519 | XRectangle *r1, *r2, *result; | |
133c764e | 20520 | { |
fa3c6b4d KS |
20521 | XRectangle *left, *right; |
20522 | XRectangle *upper, *lower; | |
20523 | int intersection_p = 0; | |
20524 | ||
20525 | /* Rearrange so that R1 is the left-most rectangle. */ | |
20526 | if (r1->x < r2->x) | |
20527 | left = r1, right = r2; | |
20528 | else | |
20529 | left = r2, right = r1; | |
20530 | ||
20531 | /* X0 of the intersection is right.x0, if this is inside R1, | |
20532 | otherwise there is no intersection. */ | |
20533 | if (right->x <= left->x + left->width) | |
133c764e | 20534 | { |
fa3c6b4d | 20535 | result->x = right->x; |
133c764e | 20536 | |
fa3c6b4d KS |
20537 | /* The right end of the intersection is the minimum of the |
20538 | the right ends of left and right. */ | |
20539 | result->width = (min (left->x + left->width, right->x + right->width) | |
20540 | - result->x); | |
133c764e | 20541 | |
fa3c6b4d KS |
20542 | /* Same game for Y. */ |
20543 | if (r1->y < r2->y) | |
20544 | upper = r1, lower = r2; | |
20545 | else | |
20546 | upper = r2, lower = r1; | |
133c764e | 20547 | |
fa3c6b4d KS |
20548 | /* The upper end of the intersection is lower.y0, if this is inside |
20549 | of upper. Otherwise, there is no intersection. */ | |
20550 | if (lower->y <= upper->y + upper->height) | |
20551 | { | |
20552 | result->y = lower->y; | |
20553 | ||
20554 | /* The lower end of the intersection is the minimum of the lower | |
20555 | ends of upper and lower. */ | |
20556 | result->height = (min (lower->y + lower->height, | |
20557 | upper->y + upper->height) | |
20558 | - result->y); | |
20559 | intersection_p = 1; | |
133c764e KS |
20560 | } |
20561 | } | |
fa3c6b4d KS |
20562 | |
20563 | return intersection_p; | |
133c764e KS |
20564 | } |
20565 | ||
fa3c6b4d KS |
20566 | #endif /* HAVE_WINDOW_SYSTEM */ |
20567 | ||
cfe03a41 | 20568 | \f |
5f5c8ee5 GM |
20569 | /*********************************************************************** |
20570 | Initialization | |
20571 | ***********************************************************************/ | |
20572 | ||
a2889657 JB |
20573 | void |
20574 | syms_of_xdisp () | |
20575 | { | |
c6e89d6c GM |
20576 | Vwith_echo_area_save_vector = Qnil; |
20577 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 20578 | |
c6e89d6c GM |
20579 | Vmessage_stack = Qnil; |
20580 | staticpro (&Vmessage_stack); | |
2311178e | 20581 | |
735c094c | 20582 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 20583 | staticpro (&Qinhibit_redisplay); |
735c094c | 20584 | |
b14bc55e RS |
20585 | message_dolog_marker1 = Fmake_marker (); |
20586 | staticpro (&message_dolog_marker1); | |
20587 | message_dolog_marker2 = Fmake_marker (); | |
20588 | staticpro (&message_dolog_marker2); | |
20589 | message_dolog_marker3 = Fmake_marker (); | |
20590 | staticpro (&message_dolog_marker3); | |
20591 | ||
5f5c8ee5 | 20592 | #if GLYPH_DEBUG |
7d4cc828 | 20593 | defsubr (&Sdump_frame_glyph_matrix); |
5f5c8ee5 GM |
20594 | defsubr (&Sdump_glyph_matrix); |
20595 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 20596 | defsubr (&Sdump_tool_bar_row); |
62397849 | 20597 | defsubr (&Strace_redisplay); |
bf9249e3 | 20598 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 20599 | #endif |
99a5de87 | 20600 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 20601 | defsubr (&Stool_bar_lines_needed); |
99a5de87 | 20602 | #endif |
8143e6ab | 20603 | defsubr (&Sformat_mode_line); |
5f5c8ee5 | 20604 | |
cf074754 RS |
20605 | staticpro (&Qmenu_bar_update_hook); |
20606 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
20607 | ||
d46fb96a | 20608 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 20609 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 20610 | |
399164b4 KH |
20611 | staticpro (&Qoverriding_local_map); |
20612 | Qoverriding_local_map = intern ("overriding-local-map"); | |
20613 | ||
75c43375 RS |
20614 | staticpro (&Qwindow_scroll_functions); |
20615 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
20616 | ||
e0bfbde6 RS |
20617 | staticpro (&Qredisplay_end_trigger_functions); |
20618 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
2311178e | 20619 | |
2e54982e RS |
20620 | staticpro (&Qinhibit_point_motion_hooks); |
20621 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
20622 | ||
9499d71b GM |
20623 | QCdata = intern (":data"); |
20624 | staticpro (&QCdata); | |
5f5c8ee5 | 20625 | Qdisplay = intern ("display"); |
f3751a65 | 20626 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
20627 | Qspace_width = intern ("space-width"); |
20628 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
20629 | Qraise = intern ("raise"); |
20630 | staticpro (&Qraise); | |
20631 | Qspace = intern ("space"); | |
20632 | staticpro (&Qspace); | |
f3751a65 GM |
20633 | Qmargin = intern ("margin"); |
20634 | staticpro (&Qmargin); | |
5f5c8ee5 | 20635 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 20636 | staticpro (&Qleft_margin); |
5f5c8ee5 | 20637 | Qright_margin = intern ("right-margin"); |
f3751a65 | 20638 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
20639 | Qalign_to = intern ("align-to"); |
20640 | staticpro (&Qalign_to); | |
20641 | QCalign_to = intern (":align-to"); | |
20642 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
20643 | Qrelative_width = intern ("relative-width"); |
20644 | staticpro (&Qrelative_width); | |
20645 | QCrelative_width = intern (":relative-width"); | |
20646 | staticpro (&QCrelative_width); | |
20647 | QCrelative_height = intern (":relative-height"); | |
20648 | staticpro (&QCrelative_height); | |
20649 | QCeval = intern (":eval"); | |
20650 | staticpro (&QCeval); | |
0fcf414f RS |
20651 | QCpropertize = intern (":propertize"); |
20652 | staticpro (&QCpropertize); | |
886bd6f2 GM |
20653 | QCfile = intern (":file"); |
20654 | staticpro (&QCfile); | |
5f5c8ee5 GM |
20655 | Qfontified = intern ("fontified"); |
20656 | staticpro (&Qfontified); | |
20657 | Qfontification_functions = intern ("fontification-functions"); | |
20658 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
20659 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
20660 | staticpro (&Qtrailing_whitespace); | |
20661 | Qimage = intern ("image"); | |
20662 | staticpro (&Qimage); | |
ad4f174e GM |
20663 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
20664 | staticpro (&Qmessage_truncate_lines); | |
af79bccb RS |
20665 | Qcursor_in_non_selected_windows = intern ("cursor-in-non-selected-windows"); |
20666 | staticpro (&Qcursor_in_non_selected_windows); | |
6422c1d7 GM |
20667 | Qgrow_only = intern ("grow-only"); |
20668 | staticpro (&Qgrow_only); | |
e1477f43 GM |
20669 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
20670 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
20671 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
20672 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
20673 | Qposition = intern ("position"); |
20674 | staticpro (&Qposition); | |
20675 | Qbuffer_position = intern ("buffer-position"); | |
20676 | staticpro (&Qbuffer_position); | |
20677 | Qobject = intern ("object"); | |
20678 | staticpro (&Qobject); | |
cfe03a41 KS |
20679 | Qbar = intern ("bar"); |
20680 | staticpro (&Qbar); | |
20681 | Qhbar = intern ("hbar"); | |
20682 | staticpro (&Qhbar); | |
20683 | Qbox = intern ("box"); | |
20684 | staticpro (&Qbox); | |
20685 | Qhollow = intern ("hollow"); | |
20686 | staticpro (&Qhollow); | |
c53a1624 RS |
20687 | Qrisky_local_variable = intern ("risky-local-variable"); |
20688 | staticpro (&Qrisky_local_variable); | |
26683087 RS |
20689 | Qinhibit_free_realized_faces = intern ("inhibit-free-realized-faces"); |
20690 | staticpro (&Qinhibit_free_realized_faces); | |
5f5c8ee5 | 20691 | |
7033d6df RS |
20692 | list_of_error = Fcons (intern ("error"), Qnil); |
20693 | staticpro (&list_of_error); | |
20694 | ||
a2889657 JB |
20695 | last_arrow_position = Qnil; |
20696 | last_arrow_string = Qnil; | |
f3751a65 GM |
20697 | staticpro (&last_arrow_position); |
20698 | staticpro (&last_arrow_string); | |
2311178e | 20699 | |
c6e89d6c GM |
20700 | echo_buffer[0] = echo_buffer[1] = Qnil; |
20701 | staticpro (&echo_buffer[0]); | |
20702 | staticpro (&echo_buffer[1]); | |
20703 | ||
20704 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
20705 | staticpro (&echo_area_buffer[0]); | |
20706 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 20707 | |
6a94510a GM |
20708 | Vmessages_buffer_name = build_string ("*Messages*"); |
20709 | staticpro (&Vmessages_buffer_name); | |
0fcf414f RS |
20710 | |
20711 | mode_line_proptrans_alist = Qnil; | |
20712 | staticpro (&mode_line_proptrans_alist); | |
2311178e | 20713 | |
fec8f23e KS |
20714 | mode_line_string_list = Qnil; |
20715 | staticpro (&mode_line_string_list); | |
20716 | ||
fa3c6b4d KS |
20717 | help_echo_string = Qnil; |
20718 | staticpro (&help_echo_string); | |
20719 | help_echo_object = Qnil; | |
20720 | staticpro (&help_echo_object); | |
20721 | help_echo_window = Qnil; | |
20722 | staticpro (&help_echo_window); | |
20723 | previous_help_echo_string = Qnil; | |
20724 | staticpro (&previous_help_echo_string); | |
20725 | help_echo_pos = -1; | |
20726 | ||
20727 | #ifdef HAVE_WINDOW_SYSTEM | |
20728 | DEFVAR_BOOL ("x-stretch-cursor", &x_stretch_cursor_p, | |
20729 | doc: /* *Non-nil means draw block cursor as wide as the glyph under it. | |
20730 | For example, if a block cursor is over a tab, it will be drawn as | |
20731 | wide as that tab on the display. */); | |
20732 | x_stretch_cursor_p = 0; | |
20733 | #endif | |
20734 | ||
7ee72033 MB |
20735 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
20736 | doc: /* Non-nil means highlight trailing whitespace. | |
228299fa | 20737 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
20738 | Vshow_trailing_whitespace = Qnil; |
20739 | ||
7ee72033 MB |
20740 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
20741 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 20742 | This is used for internal purposes. */); |
735c094c KH |
20743 | Vinhibit_redisplay = Qnil; |
20744 | ||
7ee72033 MB |
20745 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
20746 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
20747 | Vglobal_mode_string = Qnil; |
20748 | ||
7ee72033 MB |
20749 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
20750 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
20751 | This must be the beginning of a line in order to work. |
20752 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
20753 | Voverlay_arrow_position = Qnil; |
20754 | ||
7ee72033 MB |
20755 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
20756 | doc: /* String to display as an arrow. See also `overlay-arrow-position'. */); | |
a2889657 JB |
20757 | Voverlay_arrow_string = Qnil; |
20758 | ||
7ee72033 MB |
20759 | DEFVAR_INT ("scroll-step", &scroll_step, |
20760 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
20761 | If that fails to bring point back on frame, point is centered instead. |
20762 | If this is zero, point is always centered after it moves off frame. | |
20763 | If you want scrolling to always be a line at a time, you should set | |
20764 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
20765 | ||
7ee72033 MB |
20766 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
20767 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
20768 | A value of zero means to scroll the text to center point vertically |
20769 | in the window. */); | |
0789adb2 RS |
20770 | scroll_conservatively = 0; |
20771 | ||
7ee72033 MB |
20772 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
20773 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
20774 | Recenter the window whenever point gets within this many lines |
20775 | of the top or bottom of the window. */); | |
9afd2168 RS |
20776 | scroll_margin = 0; |
20777 | ||
5f5c8ee5 | 20778 | #if GLYPH_DEBUG |
7ee72033 | 20779 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 20780 | #endif |
a2889657 JB |
20781 | |
20782 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
20783 | &truncate_partial_width_windows, |
20784 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
20785 | truncate_partial_width_windows = 1; |
20786 | ||
7ee72033 MB |
20787 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
20788 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa | 20789 | Any other value means to use the appropriate face, `mode-line', |
ccfe8f57 | 20790 | `header-line', or `menu' respectively. */); |
1862a24e | 20791 | mode_line_inverse_video = 1; |
aa6d10fa | 20792 | |
7ee72033 MB |
20793 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
20794 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
20795 | If the buffer is bigger than this, the line number does not appear |
20796 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 20797 | Vline_number_display_limit = Qnil; |
fba9ce76 | 20798 | |
090703f4 | 20799 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
20800 | &line_number_display_limit_width, |
20801 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
20802 | If the average length of the lines near point is bigger than this, then the |
20803 | line number may be omitted from the mode line. */); | |
5d121aec KH |
20804 | line_number_display_limit_width = 200; |
20805 | ||
7ee72033 MB |
20806 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
20807 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 20808 | highlight_nonselected_windows = 0; |
d39b6696 | 20809 | |
7ee72033 MB |
20810 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
20811 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
20812 | Minibuffer-only frames don't count, but iconified frames do. |
20813 | This variable is not guaranteed to be accurate except while processing | |
20814 | `frame-title-format' and `icon-title-format'. */); | |
20815 | ||
7ee72033 MB |
20816 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
20817 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
20818 | \(Assuming the window manager supports this feature.) |
20819 | This variable has the same structure as `mode-line-format' (which see), | |
20820 | and is used only on frames for which no explicit name has been set | |
20821 | \(see `modify-frame-parameters'). */); | |
7ee72033 MB |
20822 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
20823 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
20824 | \(Assuming the window manager supports this feature.) |
20825 | This variable has the same structure as `mode-line-format' (which see), | |
20826 | and is used only on frames for which no explicit name has been set | |
20827 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
20828 | Vicon_title_format |
20829 | = Vframe_title_format | |
20830 | = Fcons (intern ("multiple-frames"), | |
20831 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 20832 | Fcons (Fcons (empty_string, |
d39b6696 KH |
20833 | Fcons (intern ("invocation-name"), |
20834 | Fcons (build_string ("@"), | |
20835 | Fcons (intern ("system-name"), | |
20836 | Qnil)))), | |
20837 | Qnil))); | |
5992c4f7 | 20838 | |
7ee72033 MB |
20839 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
20840 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
20841 | If nil, disable message logging. If t, log messages but don't truncate |
20842 | the buffer when it becomes large. */); | |
ac90c44f | 20843 | Vmessage_log_max = make_number (50); |
08b610e4 | 20844 | |
7ee72033 MB |
20845 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
20846 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
20847 | The value should be a list of functions that take one argument. |
20848 | Just before redisplay, for each frame, if any of its windows have changed | |
20849 | size since the last redisplay, or have been split or deleted, | |
20850 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 20851 | Vwindow_size_change_functions = Qnil; |
75c43375 | 20852 | |
7ee72033 MB |
20853 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
20854 | doc: /* List of Functions to call before redisplaying a window with scrolling. | |
228299fa GM |
20855 | Each function is called with two arguments, the window |
20856 | and its new display-start position. Note that the value of `window-end' | |
20857 | is not valid when these functions are called. */); | |
75c43375 | 20858 | Vwindow_scroll_functions = Qnil; |
2311178e | 20859 | |
fa3c6b4d KS |
20860 | DEFVAR_BOOL ("mouse-autoselect-window", &mouse_autoselect_window, |
20861 | doc: /* *Non-nil means autoselect window with mouse pointer. */); | |
20862 | mouse_autoselect_window = 0; | |
20863 | ||
7ee72033 MB |
20864 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
20865 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
20866 | This increases a tool-bar's height if not all tool-bar items are visible. |
20867 | It decreases a tool-bar's height when it would display blank lines | |
20868 | otherwise. */); | |
e037b9ec | 20869 | auto_resize_tool_bars_p = 1; |
2311178e | 20870 | |
7ee72033 MB |
20871 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
20872 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 20873 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 20874 | |
7ee72033 MB |
20875 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
20876 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa | 20877 | If an integer, use that for both horizontal and vertical margins. |
f6c89f27 | 20878 | Otherwise, value should be a pair of integers `(HORZ . VERT)' with |
228299fa GM |
20879 | HORZ specifying the horizontal margin, and VERT specifying the |
20880 | vertical margin. */); | |
c3d76173 | 20881 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 20882 | |
7ee72033 | 20883 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
6da3c85b | 20884 | doc: /* *Relief thickness of tool-bar buttons. */); |
c3d76173 | 20885 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 20886 | |
7ee72033 MB |
20887 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
20888 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
20889 | Each function is called with one argument POS. Functions must |
20890 | fontify a region starting at POS in the current buffer, and give | |
20891 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 20892 | Vfontification_functions = Qnil; |
6b9f0906 | 20893 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
20894 | |
20895 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
20896 | &unibyte_display_via_language_environment, |
20897 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
20898 | Specifically this means that unibyte non-ASCII characters |
20899 | are displayed by converting them to the equivalent multibyte characters | |
20900 | according to the current language environment. As a result, they are | |
20901 | displayed according to the current fontset. */); | |
7bbe686f | 20902 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 20903 | |
7ee72033 MB |
20904 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
20905 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
20906 | If a float, it specifies a fraction of the mini-window frame's height. |
20907 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 20908 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 20909 | |
7ee72033 MB |
20910 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
20911 | doc: /* *How to resize mini-windows. | |
228299fa GM |
20912 | A value of nil means don't automatically resize mini-windows. |
20913 | A value of t means resize them to fit the text displayed in them. | |
20914 | A value of `grow-only', the default, means let mini-windows grow | |
20915 | only, until their display becomes empty, at which point the windows | |
20916 | go back to their normal size. */); | |
6422c1d7 GM |
20917 | Vresize_mini_windows = Qgrow_only; |
20918 | ||
cfe03a41 KS |
20919 | DEFVAR_LISP ("cursor-in-non-selected-windows", |
20920 | &Vcursor_in_non_selected_windows, | |
20921 | doc: /* *Cursor type to display in non-selected windows. | |
20922 | t means to use hollow box cursor. See `cursor-type' for other values. */); | |
20923 | Vcursor_in_non_selected_windows = Qt; | |
20924 | ||
cfe03a41 KS |
20925 | DEFVAR_LISP ("blink-cursor-alist", &Vblink_cursor_alist, |
20926 | doc: /* Alist specifying how to blink the cursor off. | |
20927 | Each element has the form (ON-STATE . OFF-STATE). Whenever the | |
20928 | `cursor-type' frame-parameter or variable equals ON-STATE, | |
20929 | comparing using `equal', Emacs uses OFF-STATE to specify | |
20930 | how to blink it off. */); | |
20931 | Vblink_cursor_alist = Qnil; | |
2311178e | 20932 | |
e76d28d5 | 20933 | DEFVAR_BOOL ("auto-hscroll-mode", &automatic_hscrolling_p, |
7ee72033 | 20934 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); |
d475bcb8 | 20935 | automatic_hscrolling_p = 1; |
1df7e8f0 | 20936 | |
e76d28d5 | 20937 | DEFVAR_INT ("hscroll-margin", &hscroll_margin, |
1df7e8f0 EZ |
20938 | doc: /* *How many columns away from the window edge point is allowed to get |
20939 | before automatic hscrolling will horizontally scroll the window. */); | |
e76d28d5 | 20940 | hscroll_margin = 5; |
1df7e8f0 | 20941 | |
e76d28d5 | 20942 | DEFVAR_LISP ("hscroll-step", &Vhscroll_step, |
1df7e8f0 EZ |
20943 | doc: /* *How many columns to scroll the window when point gets too close to the edge. |
20944 | When point is less than `automatic-hscroll-margin' columns from the window | |
20945 | edge, automatic hscrolling will scroll the window by the amount of columns | |
20946 | determined by this variable. If its value is a positive integer, scroll that | |
20947 | many columns. If it's a positive floating-point number, it specifies the | |
20948 | fraction of the window's width to scroll. If it's nil or zero, point will be | |
20949 | centered horizontally after the scroll. Any other value, including negative | |
20950 | numbers, are treated as if the value were zero. | |
20951 | ||
20952 | Automatic hscrolling always moves point outside the scroll margin, so if | |
20953 | point was more than scroll step columns inside the margin, the window will | |
20954 | scroll more than the value given by the scroll step. | |
20955 | ||
20956 | Note that the lower bound for automatic hscrolling specified by `scroll-left' | |
20957 | and `scroll-right' overrides this variable's effect. */); | |
e76d28d5 | 20958 | Vhscroll_step = make_number (0); |
2311178e | 20959 | |
7ee72033 MB |
20960 | DEFVAR_LISP ("image-types", &Vimage_types, |
20961 | doc: /* List of supported image types. | |
228299fa | 20962 | Each element of the list is a symbol for a supported image type. */); |
e00daaa0 | 20963 | Vimage_types = Qnil; |
2311178e | 20964 | |
7ee72033 MB |
20965 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
20966 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 20967 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 20968 | message_truncate_lines = 0; |
0bca8940 | 20969 | |
7ee72033 MB |
20970 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
20971 | doc: /* Normal hook run for clicks on menu bar, before displaying a submenu. | |
228299fa | 20972 | Can be used to update submenus whose contents should vary. */); |
6422c1d7 | 20973 | Vmenu_bar_update_hook = Qnil; |
2311178e | 20974 | |
7ee72033 MB |
20975 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
20976 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 20977 | inhibit_menubar_update = 0; |
30a3f61c | 20978 | |
7ee72033 MB |
20979 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
20980 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 20981 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 20982 | |
26683087 RS |
20983 | DEFVAR_BOOL ("inhibit-free-realized-faces", &inhibit_free_realized_faces, |
20984 | doc: /* Non-nil means don't free realized faces. Internal use only. */); | |
20985 | inhibit_free_realized_faces = 0; | |
20986 | ||
69d1f7c9 | 20987 | #if GLYPH_DEBUG |
76cb5e06 GM |
20988 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
20989 | doc: /* Inhibit try_window_id display optimization. */); | |
20990 | inhibit_try_window_id = 0; | |
20991 | ||
20992 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
20993 | doc: /* Inhibit try_window_reusing display optimization. */); | |
20994 | inhibit_try_window_reusing = 0; | |
20995 | ||
20996 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
20997 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
20998 | inhibit_try_cursor_movement = 0; | |
20999 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
21000 | } |
21001 | ||
5f5c8ee5 GM |
21002 | |
21003 | /* Initialize this module when Emacs starts. */ | |
21004 | ||
dfcf069d | 21005 | void |
a2889657 JB |
21006 | init_xdisp () |
21007 | { | |
21008 | Lisp_Object root_window; | |
5f5c8ee5 | 21009 | struct window *mini_w; |
a2889657 | 21010 | |
04612a64 GM |
21011 | current_header_line_height = current_mode_line_height = -1; |
21012 | ||
5f5c8ee5 | 21013 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
21014 | |
21015 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 21016 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 21017 | |
a2889657 JB |
21018 | if (!noninteractive) |
21019 | { | |
5f5c8ee5 GM |
21020 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
21021 | int i; | |
21022 | ||
da8b7f4f | 21023 | XWINDOW (root_window)->top_line = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 21024 | set_window_height (root_window, |
da8b7f4f | 21025 | FRAME_LINES (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 21026 | 0); |
da8b7f4f | 21027 | mini_w->top_line = make_number (FRAME_LINES (f) - 1); |
a2889657 JB |
21028 | set_window_height (minibuf_window, 1, 0); |
21029 | ||
da8b7f4f KS |
21030 | XWINDOW (root_window)->total_cols = make_number (FRAME_COLS (f)); |
21031 | mini_w->total_cols = make_number (FRAME_COLS (f)); | |
5f5c8ee5 GM |
21032 | |
21033 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
21034 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
21035 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
21036 | ||
2311178e | 21037 | /* The default ellipsis glyphs `...'. */ |
5f5c8ee5 | 21038 | for (i = 0; i < 3; ++i) |
ac90c44f | 21039 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 21040 | } |
5f5c8ee5 | 21041 | |
5f5c8ee5 | 21042 | { |
93da8435 SM |
21043 | /* Allocate the buffer for frame titles. |
21044 | Also used for `format-mode-line'. */ | |
5f5c8ee5 GM |
21045 | int size = 100; |
21046 | frame_title_buf = (char *) xmalloc (size); | |
21047 | frame_title_buf_end = frame_title_buf + size; | |
21048 | frame_title_ptr = NULL; | |
21049 | } | |
2311178e | 21050 | |
21fdfb65 | 21051 | help_echo_showing_p = 0; |
a2889657 | 21052 | } |
5f5c8ee5 GM |
21053 | |
21054 | ||
ab5796a9 MB |
21055 | /* arch-tag: eacc864d-bb6a-4b74-894a-1a4399a1358b |
21056 | (do not change this comment) */ |