Commit | Line | Data |
---|---|---|
a2889657 | 1 | /* Display generation from window structure and buffer text. |
3824b1a6 | 2 | Copyright (C) 1985,86,87,88,93,94,95,97,98,99, 2000, 2001, 2002, 2003 |
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" | |
182 | #include "macros.h" | |
183 | #include "disptab.h" | |
30c566e4 | 184 | #include "termhooks.h" |
b0a0fbda | 185 | #include "intervals.h" |
1c9241f5 KH |
186 | #include "coding.h" |
187 | #include "process.h" | |
dfcf069d | 188 | #include "region-cache.h" |
0ef75e87 | 189 | #include "fontset.h" |
f9b3d256 | 190 | #include "blockinput.h" |
dfcf069d | 191 | |
6d55d620 | 192 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
193 | #include "xterm.h" |
194 | #endif | |
a75dfea0 AI |
195 | #ifdef WINDOWSNT |
196 | #include "w32term.h" | |
197 | #endif | |
e0f712ba | 198 | #ifdef MAC_OS |
1a578e9b AC |
199 | #include "macterm.h" |
200 | #endif | |
a2889657 | 201 | |
5f5c8ee5 GM |
202 | #define INFINITY 10000000 |
203 | ||
488dd4c4 JD |
204 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
205 | || defined (USE_GTK) | |
2e621225 | 206 | extern void set_frame_menubar P_ ((struct frame *f, int, int)); |
cd6dfed6 | 207 | extern int pending_menu_activation; |
76412d64 RS |
208 | #endif |
209 | ||
a2889657 JB |
210 | extern int interrupt_input; |
211 | extern int command_loop_level; | |
212 | ||
b6436d4e | 213 | extern int minibuffer_auto_raise; |
b2b5455d | 214 | extern Lisp_Object Vminibuffer_list; |
b6436d4e | 215 | |
c4628384 | 216 | extern Lisp_Object Qface; |
fec8f23e | 217 | extern Lisp_Object Qmode_line, Qmode_line_inactive, Qheader_line; |
c4628384 | 218 | |
399164b4 KH |
219 | extern Lisp_Object Voverriding_local_map; |
220 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 221 | extern Lisp_Object Qmenu_item; |
0b063c27 | 222 | extern Lisp_Object Qwhen; |
399164b4 | 223 | |
d46fb96a | 224 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 225 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 226 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 227 | Lisp_Object Qinhibit_point_motion_hooks; |
0b063c27 | 228 | Lisp_Object QCeval, QCfile, QCdata, QCpropertize; |
5f5c8ee5 | 229 | Lisp_Object Qfontified; |
6422c1d7 | 230 | Lisp_Object Qgrow_only; |
869fb12c | 231 | Lisp_Object Qinhibit_eval_during_redisplay; |
b384d6f8 | 232 | Lisp_Object Qbuffer_position, Qposition, Qobject; |
5f5c8ee5 | 233 | |
cfe03a41 KS |
234 | /* Cursor shapes */ |
235 | Lisp_Object Qbar, Qhbar, Qbox, Qhollow; | |
236 | ||
c53a1624 RS |
237 | Lisp_Object Qrisky_local_variable; |
238 | ||
7033d6df RS |
239 | /* Holds the list (error). */ |
240 | Lisp_Object list_of_error; | |
241 | ||
5f5c8ee5 GM |
242 | /* Functions called to fontify regions of text. */ |
243 | ||
244 | Lisp_Object Vfontification_functions; | |
245 | Lisp_Object Qfontification_functions; | |
246 | ||
e037b9ec | 247 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
248 | over them. */ |
249 | ||
e037b9ec | 250 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 251 | |
e037b9ec | 252 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 253 | |
35a41507 | 254 | Lisp_Object Vtool_bar_button_margin; |
5f5c8ee5 | 255 | |
e037b9ec | 256 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 257 | |
31ade731 | 258 | EMACS_INT tool_bar_button_relief; |
5f5c8ee5 | 259 | |
e037b9ec | 260 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
261 | items are visible, and no blank lines remain. */ |
262 | ||
e037b9ec | 263 | int auto_resize_tool_bars_p; |
399164b4 | 264 | |
735c094c KH |
265 | /* Non-nil means don't actually do any redisplay. */ |
266 | ||
267 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
268 | ||
30a3f61c GM |
269 | /* Non-zero means Lisp evaluation during redisplay is inhibited. */ |
270 | ||
869fb12c | 271 | int inhibit_eval_during_redisplay; |
30a3f61c | 272 | |
5f5c8ee5 GM |
273 | /* Names of text properties relevant for redisplay. */ |
274 | ||
a7e27ef7 | 275 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
4b41cebb | 276 | extern Lisp_Object Qface, Qinvisible, Qwidth; |
5f5c8ee5 GM |
277 | |
278 | /* Symbols used in text property values. */ | |
279 | ||
280 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 281 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 282 | Lisp_Object Qmargin; |
a7e27ef7 | 283 | extern Lisp_Object Qheight; |
133c764e | 284 | extern Lisp_Object QCwidth, QCheight, QCascent; |
5f5c8ee5 | 285 | |
8f897821 | 286 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 287 | |
8f897821 | 288 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
289 | |
290 | /* Name of the face used to highlight trailing whitespace. */ | |
291 | ||
292 | Lisp_Object Qtrailing_whitespace; | |
293 | ||
294 | /* The symbol `image' which is the car of the lists used to represent | |
295 | images in Lisp. */ | |
296 | ||
297 | Lisp_Object Qimage; | |
298 | ||
299 | /* Non-zero means print newline to stdout before next mini-buffer | |
300 | message. */ | |
a2889657 JB |
301 | |
302 | int noninteractive_need_newline; | |
303 | ||
5f5c8ee5 | 304 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 305 | |
3c6595e0 | 306 | static int message_log_need_newline; |
f88eb0b6 | 307 | |
b14bc55e RS |
308 | /* Three markers that message_dolog uses. |
309 | It could allocate them itself, but that causes trouble | |
310 | in handling memory-full errors. */ | |
311 | static Lisp_Object message_dolog_marker1; | |
312 | static Lisp_Object message_dolog_marker2; | |
313 | static Lisp_Object message_dolog_marker3; | |
5f5c8ee5 GM |
314 | \f |
315 | /* The buffer position of the first character appearing entirely or | |
316 | partially on the line of the selected window which contains the | |
317 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
318 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 319 | |
5f5c8ee5 | 320 | static struct text_pos this_line_start_pos; |
a2889657 | 321 | |
5f5c8ee5 GM |
322 | /* Number of characters past the end of the line above, including the |
323 | terminating newline. */ | |
324 | ||
325 | static struct text_pos this_line_end_pos; | |
326 | ||
327 | /* The vertical positions and the height of this line. */ | |
a2889657 | 328 | |
a2889657 | 329 | static int this_line_vpos; |
5f5c8ee5 GM |
330 | static int this_line_y; |
331 | static int this_line_pixel_height; | |
332 | ||
333 | /* X position at which this display line starts. Usually zero; | |
334 | negative if first character is partially visible. */ | |
335 | ||
336 | static int this_line_start_x; | |
a2889657 | 337 | |
5f5c8ee5 | 338 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 339 | |
a2889657 JB |
340 | static struct buffer *this_line_buffer; |
341 | ||
5f5c8ee5 GM |
342 | /* Nonzero means truncate lines in all windows less wide than the |
343 | frame. */ | |
a2889657 | 344 | |
a2889657 JB |
345 | int truncate_partial_width_windows; |
346 | ||
7bbe686f | 347 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 348 | |
7bbe686f | 349 | int unibyte_display_via_language_environment; |
2311178e | 350 | |
5f5c8ee5 GM |
351 | /* Nonzero means we have more than one non-mini-buffer-only frame. |
352 | Not guaranteed to be accurate except while parsing | |
353 | frame-title-format. */ | |
7bbe686f | 354 | |
d39b6696 KH |
355 | int multiple_frames; |
356 | ||
a2889657 JB |
357 | Lisp_Object Vglobal_mode_string; |
358 | ||
359 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 360 | |
a2889657 JB |
361 | Lisp_Object Voverlay_arrow_position; |
362 | ||
5f5c8ee5 GM |
363 | /* String to display for the arrow. Only used on terminal frames. */ |
364 | ||
a2889657 JB |
365 | Lisp_Object Voverlay_arrow_string; |
366 | ||
5f5c8ee5 GM |
367 | /* Values of those variables at last redisplay. However, if |
368 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
369 | numerical position. */ | |
370 | ||
d45de95b RS |
371 | static Lisp_Object last_arrow_position, last_arrow_string; |
372 | ||
5f5c8ee5 GM |
373 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
374 | ||
d39b6696 KH |
375 | Lisp_Object Vframe_title_format; |
376 | ||
5f5c8ee5 GM |
377 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
378 | ||
d39b6696 KH |
379 | Lisp_Object Vicon_title_format; |
380 | ||
08b610e4 RS |
381 | /* List of functions to call when a window's size changes. These |
382 | functions get one arg, a frame on which one or more windows' sizes | |
383 | have changed. */ | |
5f5c8ee5 | 384 | |
08b610e4 RS |
385 | static Lisp_Object Vwindow_size_change_functions; |
386 | ||
0bca8940 | 387 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 388 | |
a2889657 | 389 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 390 | |
5f5c8ee5 | 391 | static int overlay_arrow_seen; |
ca26e1c8 | 392 | |
fba9ce76 | 393 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 394 | |
5f5c8ee5 GM |
395 | int highlight_nonselected_windows; |
396 | ||
397 | /* If cursor motion alone moves point off frame, try scrolling this | |
398 | many lines up or down if that will bring it back. */ | |
399 | ||
31ade731 | 400 | static EMACS_INT scroll_step; |
a2889657 | 401 | |
4b41cebb | 402 | /* Nonzero means scroll just far enough to bring point back on the |
5f5c8ee5 GM |
403 | screen, when appropriate. */ |
404 | ||
31ade731 | 405 | static EMACS_INT scroll_conservatively; |
0789adb2 | 406 | |
5f5c8ee5 GM |
407 | /* Recenter the window whenever point gets within this many lines of |
408 | the top or bottom of the window. This value is translated into a | |
409 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
410 | there is really a fixed pixel height scroll margin. */ | |
411 | ||
31ade731 | 412 | EMACS_INT scroll_margin; |
9afd2168 | 413 | |
5f5c8ee5 GM |
414 | /* Number of windows showing the buffer of the selected window (or |
415 | another buffer with the same base buffer). keyboard.c refers to | |
416 | this. */ | |
a2889657 | 417 | |
a2889657 JB |
418 | int buffer_shared; |
419 | ||
5f5c8ee5 | 420 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 421 | |
5f5c8ee5 | 422 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 423 | |
1862a24e MB |
424 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
425 | (this slightly odd definition is for compatibility with previous versions | |
426 | of emacs), non-zero means display them using their respective faces. | |
427 | ||
428 | This variable is deprecated. */ | |
a2889657 | 429 | |
a2889657 JB |
430 | int mode_line_inverse_video; |
431 | ||
5f5c8ee5 GM |
432 | /* Prompt to display in front of the mini-buffer contents. */ |
433 | ||
8c5b6a0a | 434 | Lisp_Object minibuf_prompt; |
a2889657 | 435 | |
5f5c8ee5 GM |
436 | /* Width of current mini-buffer prompt. Only set after display_line |
437 | of the line that contains the prompt. */ | |
438 | ||
a2889657 | 439 | int minibuf_prompt_width; |
5f5c8ee5 | 440 | |
5f5c8ee5 GM |
441 | /* This is the window where the echo area message was displayed. It |
442 | is always a mini-buffer window, but it may not be the same window | |
443 | currently active as a mini-buffer. */ | |
444 | ||
73af359d RS |
445 | Lisp_Object echo_area_window; |
446 | ||
c6e89d6c GM |
447 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
448 | pushes the current message and the value of | |
449 | message_enable_multibyte on the stack, the function restore_message | |
450 | pops the stack and displays MESSAGE again. */ | |
451 | ||
452 | Lisp_Object Vmessage_stack; | |
453 | ||
a3788d53 RS |
454 | /* Nonzero means multibyte characters were enabled when the echo area |
455 | message was specified. */ | |
5f5c8ee5 | 456 | |
a3788d53 RS |
457 | int message_enable_multibyte; |
458 | ||
4b41cebb | 459 | /* Nonzero if we should redraw the mode lines on the next redisplay. */ |
5f5c8ee5 | 460 | |
a2889657 JB |
461 | int update_mode_lines; |
462 | ||
5f5c8ee5 | 463 | /* Nonzero if window sizes or contents have changed since last |
4b41cebb | 464 | redisplay that finished. */ |
5f5c8ee5 | 465 | |
a2889657 JB |
466 | int windows_or_buffers_changed; |
467 | ||
5fb96e96 RS |
468 | /* Nonzero means a frame's cursor type has been changed. */ |
469 | ||
470 | int cursor_type_changed; | |
471 | ||
5f5c8ee5 GM |
472 | /* Nonzero after display_mode_line if %l was used and it displayed a |
473 | line number. */ | |
474 | ||
aa6d10fa RS |
475 | int line_number_displayed; |
476 | ||
477 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 478 | |
090703f4 | 479 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 480 | |
4b41cebb | 481 | /* Line width to consider when repositioning for line number display. */ |
5d121aec | 482 | |
31ade731 | 483 | static EMACS_INT line_number_display_limit_width; |
5d121aec | 484 | |
5f5c8ee5 GM |
485 | /* Number of lines to keep in the message log buffer. t means |
486 | infinite. nil means don't log at all. */ | |
487 | ||
5992c4f7 | 488 | Lisp_Object Vmessage_log_max; |
d45de95b | 489 | |
6a94510a GM |
490 | /* The name of the *Messages* buffer, a string. */ |
491 | ||
492 | static Lisp_Object Vmessages_buffer_name; | |
493 | ||
c6e89d6c GM |
494 | /* Current, index 0, and last displayed echo area message. Either |
495 | buffers from echo_buffers, or nil to indicate no message. */ | |
496 | ||
497 | Lisp_Object echo_area_buffer[2]; | |
498 | ||
499 | /* The buffers referenced from echo_area_buffer. */ | |
500 | ||
501 | static Lisp_Object echo_buffer[2]; | |
502 | ||
503 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
504 | ||
505 | static Lisp_Object Vwith_echo_area_save_vector; | |
506 | ||
507 | /* Non-zero means display_echo_area should display the last echo area | |
508 | message again. Set by redisplay_preserve_echo_area. */ | |
509 | ||
510 | static int display_last_displayed_message_p; | |
511 | ||
512 | /* Nonzero if echo area is being used by print; zero if being used by | |
513 | message. */ | |
514 | ||
515 | int message_buf_print; | |
516 | ||
e1477f43 GM |
517 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
518 | ||
519 | Lisp_Object Qinhibit_menubar_update; | |
520 | int inhibit_menubar_update; | |
521 | ||
9142dd5b GM |
522 | /* Maximum height for resizing mini-windows. Either a float |
523 | specifying a fraction of the available height, or an integer | |
524 | specifying a number of lines. */ | |
c6e89d6c | 525 | |
ad4f174e GM |
526 | Lisp_Object Vmax_mini_window_height; |
527 | ||
528 | /* Non-zero means messages should be displayed with truncated | |
529 | lines instead of being continued. */ | |
530 | ||
531 | int message_truncate_lines; | |
532 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 533 | |
6e019995 GM |
534 | /* Set to 1 in clear_message to make redisplay_internal aware |
535 | of an emptied echo area. */ | |
536 | ||
537 | static int message_cleared_p; | |
538 | ||
d6d26ed3 GM |
539 | /* Non-zero means we want a hollow cursor in windows that are not |
540 | selected. Zero means there's no cursor in such windows. */ | |
541 | ||
cfe03a41 | 542 | Lisp_Object Vcursor_in_non_selected_windows; |
af79bccb | 543 | Lisp_Object Qcursor_in_non_selected_windows; |
d6d26ed3 | 544 | |
cfe03a41 KS |
545 | /* How to blink the default frame cursor off. */ |
546 | Lisp_Object Vblink_cursor_alist; | |
547 | ||
5f5c8ee5 GM |
548 | /* A scratch glyph row with contents used for generating truncation |
549 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 550 | |
5f5c8ee5 GM |
551 | #define MAX_SCRATCH_GLYPHS 100 |
552 | struct glyph_row scratch_glyph_row; | |
553 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 554 | |
5f5c8ee5 GM |
555 | /* Ascent and height of the last line processed by move_it_to. */ |
556 | ||
557 | static int last_max_ascent, last_height; | |
558 | ||
21fdfb65 GM |
559 | /* Non-zero if there's a help-echo in the echo area. */ |
560 | ||
561 | int help_echo_showing_p; | |
562 | ||
04612a64 GM |
563 | /* If >= 0, computed, exact values of mode-line and header-line height |
564 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
565 | CURRENT_HEADER_LINE_HEIGHT. */ | |
566 | ||
567 | int current_mode_line_height, current_header_line_height; | |
568 | ||
5f5c8ee5 | 569 | /* The maximum distance to look ahead for text properties. Values |
2311178e | 570 | that are too small let us call compute_char_face and similar |
5f5c8ee5 GM |
571 | functions too often which is expensive. Values that are too large |
572 | let us call compute_char_face and alike too often because we | |
573 | might not be interested in text properties that far away. */ | |
574 | ||
575 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
576 | ||
47589c8c GM |
577 | #if GLYPH_DEBUG |
578 | ||
76cb5e06 GM |
579 | /* Variables to turn off display optimizations from Lisp. */ |
580 | ||
581 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
582 | int inhibit_try_cursor_movement; | |
583 | ||
5f5c8ee5 GM |
584 | /* Non-zero means print traces of redisplay if compiled with |
585 | GLYPH_DEBUG != 0. */ | |
586 | ||
5f5c8ee5 | 587 | int trace_redisplay_p; |
47589c8c | 588 | |
546a4f00 | 589 | #endif /* GLYPH_DEBUG */ |
47589c8c | 590 | |
546a4f00 AI |
591 | #ifdef DEBUG_TRACE_MOVE |
592 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
593 | int trace_move; |
594 | ||
47589c8c GM |
595 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
596 | #else | |
91c3f500 | 597 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 598 | #endif |
2311178e | 599 | |
d475bcb8 GM |
600 | /* Non-zero means automatically scroll windows horizontally to make |
601 | point visible. */ | |
602 | ||
603 | int automatic_hscrolling_p; | |
604 | ||
1df7e8f0 EZ |
605 | /* How close to the margin can point get before the window is scrolled |
606 | horizontally. */ | |
5d335845 | 607 | EMACS_INT hscroll_margin; |
1df7e8f0 EZ |
608 | |
609 | /* How much to scroll horizontally when point is inside the above margin. */ | |
e76d28d5 | 610 | Lisp_Object Vhscroll_step; |
1df7e8f0 | 611 | |
e00daaa0 GM |
612 | /* A list of symbols, one for each supported image type. */ |
613 | ||
614 | Lisp_Object Vimage_types; | |
615 | ||
6422c1d7 | 616 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 617 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
618 | display. If `grow-only', let mini-windows grow only until they |
619 | become empty. */ | |
620 | ||
621 | Lisp_Object Vresize_mini_windows; | |
622 | ||
82a7ab23 RS |
623 | /* Buffer being redisplayed -- for redisplay_window_error. */ |
624 | ||
625 | struct buffer *displayed_buffer; | |
626 | ||
5f5c8ee5 GM |
627 | /* Value returned from text property handlers (see below). */ |
628 | ||
629 | enum prop_handled | |
3c6595e0 | 630 | { |
5f5c8ee5 GM |
631 | HANDLED_NORMALLY, |
632 | HANDLED_RECOMPUTE_PROPS, | |
633 | HANDLED_OVERLAY_STRING_CONSUMED, | |
634 | HANDLED_RETURN | |
635 | }; | |
3c6595e0 | 636 | |
5f5c8ee5 GM |
637 | /* A description of text properties that redisplay is interested |
638 | in. */ | |
3c6595e0 | 639 | |
5f5c8ee5 GM |
640 | struct props |
641 | { | |
642 | /* The name of the property. */ | |
643 | Lisp_Object *name; | |
90adcf20 | 644 | |
5f5c8ee5 GM |
645 | /* A unique index for the property. */ |
646 | enum prop_idx idx; | |
647 | ||
648 | /* A handler function called to set up iterator IT from the property | |
649 | at IT's current position. Value is used to steer handle_stop. */ | |
650 | enum prop_handled (*handler) P_ ((struct it *it)); | |
651 | }; | |
652 | ||
653 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
654 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
655 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 656 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
657 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
658 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
659 | ||
660 | /* Properties handled by iterators. */ | |
661 | ||
662 | static struct props it_props[] = | |
5992c4f7 | 663 | { |
5f5c8ee5 GM |
664 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
665 | /* Handle `face' before `display' because some sub-properties of | |
666 | `display' need to know the face. */ | |
667 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
668 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
669 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 670 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
671 | {NULL, 0, NULL} |
672 | }; | |
5992c4f7 | 673 | |
5f5c8ee5 GM |
674 | /* Value is the position described by X. If X is a marker, value is |
675 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 676 | |
5f5c8ee5 | 677 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 678 | |
5f5c8ee5 | 679 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 680 | |
5f5c8ee5 GM |
681 | enum move_it_result |
682 | { | |
683 | /* Not used. Undefined value. */ | |
684 | MOVE_UNDEFINED, | |
bab29e15 | 685 | |
5f5c8ee5 GM |
686 | /* Move ended at the requested buffer position or ZV. */ |
687 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 688 | |
5f5c8ee5 GM |
689 | /* Move ended at the requested X pixel position. */ |
690 | MOVE_X_REACHED, | |
12adba34 | 691 | |
5f5c8ee5 GM |
692 | /* Move within a line ended at the end of a line that must be |
693 | continued. */ | |
694 | MOVE_LINE_CONTINUED, | |
2311178e | 695 | |
5f5c8ee5 GM |
696 | /* Move within a line ended at the end of a line that would |
697 | be displayed truncated. */ | |
698 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 699 | |
5f5c8ee5 GM |
700 | /* Move within a line ended at a line end. */ |
701 | MOVE_NEWLINE_OR_CR | |
702 | }; | |
12adba34 | 703 | |
1987b083 RS |
704 | /* This counter is used to clear the face cache every once in a while |
705 | in redisplay_internal. It is incremented for each redisplay. | |
706 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
707 | cleared. */ | |
708 | ||
709 | #define CLEAR_FACE_CACHE_COUNT 500 | |
710 | static int clear_face_cache_count; | |
711 | ||
712 | /* Record the previous terminal frame we displayed. */ | |
713 | ||
714 | static struct frame *previous_terminal_frame; | |
715 | ||
716 | /* Non-zero while redisplay_internal is in progress. */ | |
717 | ||
718 | int redisplaying_p; | |
719 | ||
26683087 RS |
720 | /* Non-zero means don't free realized faces. Bound while freeing |
721 | realized faces is dangerous because glyph matrices might still | |
722 | reference them. */ | |
1987b083 | 723 | |
26683087 RS |
724 | int inhibit_free_realized_faces; |
725 | Lisp_Object Qinhibit_free_realized_faces; | |
ff6c30e5 | 726 | |
5f5c8ee5 GM |
727 | \f |
728 | /* Function prototypes. */ | |
729 | ||
5a08cbaf | 730 | static void setup_for_ellipsis P_ ((struct it *)); |
43c09969 | 731 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
74bd6d65 GM |
732 | static int single_display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
733 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); | |
cafafe0b | 734 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 735 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 736 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
737 | |
738 | #if 0 | |
2e621225 | 739 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
740 | #endif |
741 | ||
2e621225 GM |
742 | static int next_element_from_ellipsis P_ ((struct it *)); |
743 | static void pint2str P_ ((char *, int, int)); | |
744 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
745 | struct text_pos)); | |
746 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
747 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
748 | static void store_frame_title_char P_ ((char)); | |
50f80c2f | 749 | static int store_frame_title P_ ((const unsigned char *, int, int)); |
2e621225 GM |
750 | static void x_consider_frame_title P_ ((Lisp_Object)); |
751 | static void handle_stop P_ ((struct it *)); | |
752 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 753 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 754 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
755 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
756 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 757 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
758 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
759 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 760 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
761 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
762 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
763 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 764 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
765 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
766 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 767 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
50f80c2f | 768 | static int string_char_and_length P_ ((const unsigned char *, int, int *)); |
5f5c8ee5 GM |
769 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
770 | struct text_pos)); | |
771 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 772 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 GM |
773 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
774 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
775 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 776 | static int append_space P_ ((struct it *, int)); |
cb617e7c | 777 | static int make_cursor_line_fully_visible P_ ((struct window *)); |
03b0a4b4 | 778 | static int try_scrolling P_ ((Lisp_Object, int, EMACS_INT, EMACS_INT, int, int)); |
47589c8c | 779 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
780 | static int trailing_whitespace_p P_ ((int)); |
781 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
782 | static void push_it P_ ((struct it *)); |
783 | static void pop_it P_ ((struct it *)); | |
784 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
785 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 786 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
787 | static void redisplay_windows P_ ((Lisp_Object)); |
788 | static void redisplay_window P_ ((Lisp_Object, int)); | |
82a7ab23 RS |
789 | static Lisp_Object redisplay_window_error (); |
790 | static Lisp_Object redisplay_window_0 P_ ((Lisp_Object)); | |
791 | static Lisp_Object redisplay_window_1 P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
792 | static void update_menu_bar P_ ((struct frame *, int)); |
793 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
794 | static int try_window_id P_ ((struct window *)); | |
795 | static int display_line P_ ((struct it *)); | |
715e84c9 | 796 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 797 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
c53a1624 | 798 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object, Lisp_Object, int)); |
fec8f23e | 799 | static int store_mode_line_string P_ ((char *, Lisp_Object, int, int, int, Lisp_Object)); |
72f62cb5 | 800 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
801 | static void display_menu_bar P_ ((struct window *)); |
802 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
803 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
804 | int, int, struct it *, int, int, int, int)); | |
805 | static void compute_line_metrics P_ ((struct it *)); | |
806 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 807 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 808 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
809 | static void reseat P_ ((struct it *, struct text_pos, int)); |
810 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
811 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
812 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 813 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
814 | static int next_element_from_display_vector P_ ((struct it *)); |
815 | static int next_element_from_string P_ ((struct it *)); | |
816 | static int next_element_from_c_string P_ ((struct it *)); | |
817 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 818 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
819 | static int next_element_from_image P_ ((struct it *)); |
820 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 821 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
822 | static int init_from_display_pos P_ ((struct it *, struct window *, |
823 | struct display_pos *)); | |
5f5c8ee5 GM |
824 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
825 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
826 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
827 | int, int, int)); | |
828 | void move_it_vertically_backward P_ ((struct it *, int)); | |
829 | static void init_to_row_start P_ ((struct it *, struct window *, | |
830 | struct glyph_row *)); | |
47d57b22 GM |
831 | static int init_to_row_end P_ ((struct it *, struct window *, |
832 | struct glyph_row *)); | |
5f5c8ee5 | 833 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 834 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
835 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
836 | Lisp_Object, int)); | |
837 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
838 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
839 | static int number_of_chars P_ ((unsigned char *, int)); | |
840 | static void compute_stop_pos P_ ((struct it *)); | |
841 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
842 | Lisp_Object)); | |
843 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
844 | static int next_overlay_change P_ ((int)); | |
845 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
a61b7058 GM |
846 | Lisp_Object, struct text_pos *, |
847 | int)); | |
06a12811 | 848 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
849 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
850 | struct window *)); | |
5f5c8ee5 GM |
851 | |
852 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
853 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 854 | |
5f5c8ee5 | 855 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 856 | |
e037b9ec GM |
857 | static void update_tool_bar P_ ((struct frame *, int)); |
858 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
859 | static int redisplay_tool_bar P_ ((struct frame *)); | |
860 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 861 | |
5f5c8ee5 | 862 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 863 | |
5f5c8ee5 GM |
864 | \f |
865 | /*********************************************************************** | |
866 | Window display dimensions | |
867 | ***********************************************************************/ | |
12adba34 | 868 | |
40a301b3 RS |
869 | /* Return the bottom boundary y-position for text lines in window W. |
870 | This is the first y position at which a line cannot start. | |
871 | It is relative to the top of the window. | |
872 | ||
873 | This is the height of W minus the height of a mode line, if any. */ | |
5f5c8ee5 GM |
874 | |
875 | INLINE int | |
876 | window_text_bottom_y (w) | |
877 | struct window *w; | |
878 | { | |
879 | struct frame *f = XFRAME (w->frame); | |
880 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
1a578e9b | 881 | |
5f5c8ee5 GM |
882 | if (WINDOW_WANTS_MODELINE_P (w)) |
883 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
884 | return height; | |
f88eb0b6 KH |
885 | } |
886 | ||
f82aff7c | 887 | |
5f5c8ee5 | 888 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 889 | means return the total width of W, not including fringes to |
5f5c8ee5 | 890 | the left and right of the window. */ |
ff6c30e5 | 891 | |
5f5c8ee5 GM |
892 | INLINE int |
893 | window_box_width (w, area) | |
894 | struct window *w; | |
895 | int area; | |
896 | { | |
897 | struct frame *f = XFRAME (w->frame); | |
898 | int width = XFASTINT (w->width); | |
2311178e | 899 | |
5f5c8ee5 | 900 | if (!w->pseudo_window_p) |
ff6c30e5 | 901 | { |
b46952ae | 902 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FRINGE_COLS (f); |
2311178e | 903 | |
5f5c8ee5 GM |
904 | if (area == TEXT_AREA) |
905 | { | |
906 | if (INTEGERP (w->left_margin_width)) | |
907 | width -= XFASTINT (w->left_margin_width); | |
908 | if (INTEGERP (w->right_margin_width)) | |
909 | width -= XFASTINT (w->right_margin_width); | |
910 | } | |
911 | else if (area == LEFT_MARGIN_AREA) | |
912 | width = (INTEGERP (w->left_margin_width) | |
913 | ? XFASTINT (w->left_margin_width) : 0); | |
914 | else if (area == RIGHT_MARGIN_AREA) | |
915 | width = (INTEGERP (w->right_margin_width) | |
916 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 917 | } |
5f5c8ee5 GM |
918 | |
919 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 920 | } |
1adc55de | 921 | |
1adc55de | 922 | |
5f5c8ee5 | 923 | /* Return the pixel height of the display area of window W, not |
4b41cebb | 924 | including mode lines of W, if any. */ |
f88eb0b6 | 925 | |
5f5c8ee5 GM |
926 | INLINE int |
927 | window_box_height (w) | |
928 | struct window *w; | |
f88eb0b6 | 929 | { |
5f5c8ee5 GM |
930 | struct frame *f = XFRAME (w->frame); |
931 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
7ecd4937 GM |
932 | |
933 | xassert (height >= 0); | |
2311178e | 934 | |
d9c9e99c MB |
935 | /* Note: the code below that determines the mode-line/header-line |
936 | height is essentially the same as that contained in the macro | |
937 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
938 | the appropriate glyph row has its `mode_line_p' flag set, | |
939 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
940 | ||
5f5c8ee5 | 941 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
942 | { |
943 | struct glyph_row *ml_row | |
944 | = (w->current_matrix && w->current_matrix->rows | |
945 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
946 | : 0); | |
947 | if (ml_row && ml_row->mode_line_p) | |
948 | height -= ml_row->height; | |
949 | else | |
96d2320f | 950 | height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w)); |
97dff879 | 951 | } |
5f5c8ee5 | 952 | |
045dee35 | 953 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
954 | { |
955 | struct glyph_row *hl_row | |
956 | = (w->current_matrix && w->current_matrix->rows | |
957 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
958 | : 0); | |
959 | if (hl_row && hl_row->mode_line_p) | |
960 | height -= hl_row->height; | |
961 | else | |
962 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
963 | } | |
5f5c8ee5 | 964 | |
7c75be36 PJ |
965 | /* With a very small font and a mode-line that's taller than |
966 | default, we might end up with a negative height. */ | |
967 | return max (0, height); | |
5992c4f7 KH |
968 | } |
969 | ||
970 | ||
5f5c8ee5 GM |
971 | /* Return the frame-relative coordinate of the left edge of display |
972 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 973 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 974 | |
5f5c8ee5 GM |
975 | INLINE int |
976 | window_box_left (w, area) | |
977 | struct window *w; | |
978 | int area; | |
90adcf20 | 979 | { |
5f5c8ee5 GM |
980 | struct frame *f = XFRAME (w->frame); |
981 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 982 | |
5f5c8ee5 | 983 | if (!w->pseudo_window_p) |
90adcf20 | 984 | { |
5f5c8ee5 | 985 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
b46952ae | 986 | + FRAME_LEFT_FRINGE_WIDTH (f)); |
2311178e | 987 | |
5f5c8ee5 GM |
988 | if (area == TEXT_AREA) |
989 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
990 | else if (area == RIGHT_MARGIN_AREA) | |
991 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
992 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 993 | } |
73af359d | 994 | |
5f5c8ee5 | 995 | return x; |
2311178e | 996 | } |
90adcf20 | 997 | |
b6436d4e | 998 | |
5f5c8ee5 GM |
999 | /* Return the frame-relative coordinate of the right edge of display |
1000 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 1001 | whole window, to the left of the right fringe of W. */ |
ded34426 | 1002 | |
5f5c8ee5 GM |
1003 | INLINE int |
1004 | window_box_right (w, area) | |
1005 | struct window *w; | |
1006 | int area; | |
1007 | { | |
1008 | return window_box_left (w, area) + window_box_width (w, area); | |
2311178e TTN |
1009 | } |
1010 | ||
5f5c8ee5 GM |
1011 | |
1012 | /* Get the bounding box of the display area AREA of window W, without | |
1013 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 1014 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
1015 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
1016 | coordinates of the upper-left corner of the box. Return in | |
1017 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
1018 | ||
1019 | INLINE void | |
1020 | window_box (w, area, box_x, box_y, box_width, box_height) | |
1021 | struct window *w; | |
1022 | int area; | |
1023 | int *box_x, *box_y, *box_width, *box_height; | |
1024 | { | |
1025 | struct frame *f = XFRAME (w->frame); | |
2311178e | 1026 | |
5f5c8ee5 GM |
1027 | *box_width = window_box_width (w, area); |
1028 | *box_height = window_box_height (w); | |
1029 | *box_x = window_box_left (w, area); | |
1030 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
1031 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
1032 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
1033 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 1034 | } |
1adc55de | 1035 | |
1adc55de | 1036 | |
5f5c8ee5 | 1037 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
1038 | mode lines. AREA < 0 means the whole window, not including the |
1039 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
1040 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
1041 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
1042 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
1043 | box. */ | |
ded34426 | 1044 | |
5f5c8ee5 GM |
1045 | INLINE void |
1046 | window_box_edges (w, area, top_left_x, top_left_y, | |
1047 | bottom_right_x, bottom_right_y) | |
1048 | struct window *w; | |
1049 | int area; | |
1050 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 1051 | { |
5f5c8ee5 GM |
1052 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
1053 | bottom_right_y); | |
1054 | *bottom_right_x += *top_left_x; | |
1055 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
1056 | } |
1057 | ||
5f5c8ee5 GM |
1058 | |
1059 | \f | |
1060 | /*********************************************************************** | |
1061 | Utilities | |
1062 | ***********************************************************************/ | |
1063 | ||
8b6ea97f GM |
1064 | /* Return the bottom y-position of the line the iterator IT is in. |
1065 | This can modify IT's settings. */ | |
1066 | ||
1067 | int | |
1068 | line_bottom_y (it) | |
1069 | struct it *it; | |
1070 | { | |
1071 | int line_height = it->max_ascent + it->max_descent; | |
1072 | int line_top_y = it->current_y; | |
2311178e | 1073 | |
8b6ea97f GM |
1074 | if (line_height == 0) |
1075 | { | |
1076 | if (last_height) | |
1077 | line_height = last_height; | |
1078 | else if (IT_CHARPOS (*it) < ZV) | |
1079 | { | |
1080 | move_it_by_lines (it, 1, 1); | |
1081 | line_height = (it->max_ascent || it->max_descent | |
1082 | ? it->max_ascent + it->max_descent | |
1083 | : last_height); | |
1084 | } | |
1085 | else | |
1086 | { | |
1087 | struct glyph_row *row = it->glyph_row; | |
2311178e | 1088 | |
8b6ea97f GM |
1089 | /* Use the default character height. */ |
1090 | it->glyph_row = NULL; | |
1091 | it->what = IT_CHARACTER; | |
1092 | it->c = ' '; | |
1093 | it->len = 1; | |
1094 | PRODUCE_GLYPHS (it); | |
1095 | line_height = it->ascent + it->descent; | |
1096 | it->glyph_row = row; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | return line_top_y + line_height; | |
1101 | } | |
1102 | ||
1103 | ||
0db95684 GM |
1104 | /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to |
1105 | 1 if POS is visible and the line containing POS is fully visible. | |
1106 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line | |
1107 | and header-lines heights. */ | |
3a641a69 GM |
1108 | |
1109 | int | |
04612a64 | 1110 | pos_visible_p (w, charpos, fully, exact_mode_line_heights_p) |
3a641a69 | 1111 | struct window *w; |
04612a64 | 1112 | int charpos, *fully, exact_mode_line_heights_p; |
3a641a69 GM |
1113 | { |
1114 | struct it it; | |
1115 | struct text_pos top; | |
fcab1954 GM |
1116 | int visible_p; |
1117 | struct buffer *old_buffer = NULL; | |
1118 | ||
1119 | if (XBUFFER (w->buffer) != current_buffer) | |
1120 | { | |
1121 | old_buffer = current_buffer; | |
1122 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1123 | } | |
3a641a69 GM |
1124 | |
1125 | *fully = visible_p = 0; | |
1126 | SET_TEXT_POS_FROM_MARKER (top, w->start); | |
2311178e | 1127 | |
04612a64 GM |
1128 | /* Compute exact mode line heights, if requested. */ |
1129 | if (exact_mode_line_heights_p) | |
1130 | { | |
1131 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1132 | current_mode_line_height | |
96d2320f | 1133 | = display_mode_line (w, CURRENT_MODE_LINE_FACE_ID (w), |
04612a64 | 1134 | current_buffer->mode_line_format); |
2311178e | 1135 | |
04612a64 GM |
1136 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
1137 | current_header_line_height | |
1138 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1139 | current_buffer->header_line_format); | |
1140 | } | |
3a641a69 | 1141 | |
04612a64 | 1142 | start_display (&it, w, top); |
3a641a69 GM |
1143 | move_it_to (&it, charpos, 0, it.last_visible_y, -1, |
1144 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
a13be207 GM |
1145 | |
1146 | /* Note that we may overshoot because of invisible text. */ | |
1147 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1148 | { |
8b6ea97f GM |
1149 | int top_y = it.current_y; |
1150 | int bottom_y = line_bottom_y (&it); | |
fcab1954 | 1151 | int window_top_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
2311178e | 1152 | |
8b6ea97f GM |
1153 | if (top_y < window_top_y) |
1154 | visible_p = bottom_y > window_top_y; | |
1155 | else if (top_y < it.last_visible_y) | |
fcab1954 GM |
1156 | { |
1157 | visible_p = 1; | |
8b6ea97f | 1158 | *fully = bottom_y <= it.last_visible_y; |
fcab1954 | 1159 | } |
3a641a69 GM |
1160 | } |
1161 | else if (it.current_y + it.max_ascent + it.max_descent > it.last_visible_y) | |
1162 | { | |
1163 | move_it_by_lines (&it, 1, 0); | |
1164 | if (charpos < IT_CHARPOS (it)) | |
1165 | { | |
1166 | visible_p = 1; | |
1167 | *fully = 0; | |
1168 | } | |
1169 | } | |
fcab1954 GM |
1170 | |
1171 | if (old_buffer) | |
1172 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1173 | |
1174 | current_header_line_height = current_mode_line_height = -1; | |
3a641a69 GM |
1175 | return visible_p; |
1176 | } | |
1177 | ||
1178 | ||
4fdb80f2 GM |
1179 | /* Return the next character from STR which is MAXLEN bytes long. |
1180 | Return in *LEN the length of the character. This is like | |
1181 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1182 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1183 | character. */ |
1184 | ||
1185 | static INLINE int | |
7a5b8a93 | 1186 | string_char_and_length (str, maxlen, len) |
50f80c2f | 1187 | const unsigned char *str; |
7a5b8a93 | 1188 | int maxlen, *len; |
4fdb80f2 GM |
1189 | { |
1190 | int c; | |
1191 | ||
1192 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1193 | if (!CHAR_VALID_P (c, 1)) | |
1194 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1195 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1196 | characters. */ |
1197 | c = '?'; | |
1198 | ||
1199 | return c; | |
1200 | } | |
1201 | ||
1202 | ||
1203 | ||
5f5c8ee5 GM |
1204 | /* Given a position POS containing a valid character and byte position |
1205 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1206 | ||
1207 | static struct text_pos | |
1208 | string_pos_nchars_ahead (pos, string, nchars) | |
1209 | struct text_pos pos; | |
1210 | Lisp_Object string; | |
1211 | int nchars; | |
0b1005ef | 1212 | { |
5f5c8ee5 GM |
1213 | xassert (STRINGP (string) && nchars >= 0); |
1214 | ||
1215 | if (STRING_MULTIBYTE (string)) | |
1216 | { | |
2051c264 | 1217 | int rest = SBYTES (string) - BYTEPOS (pos); |
50f80c2f | 1218 | const unsigned char *p = SDATA (string) + BYTEPOS (pos); |
5f5c8ee5 GM |
1219 | int len; |
1220 | ||
1221 | while (nchars--) | |
1222 | { | |
4fdb80f2 | 1223 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1224 | p += len, rest -= len; |
1225 | xassert (rest >= 0); | |
1226 | CHARPOS (pos) += 1; | |
1227 | BYTEPOS (pos) += len; | |
1228 | } | |
1229 | } | |
1230 | else | |
1231 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1232 | ||
1233 | return pos; | |
0a9dc68b RS |
1234 | } |
1235 | ||
0a9dc68b | 1236 | |
5f5c8ee5 GM |
1237 | /* Value is the text position, i.e. character and byte position, |
1238 | for character position CHARPOS in STRING. */ | |
1239 | ||
1240 | static INLINE struct text_pos | |
1241 | string_pos (charpos, string) | |
1242 | int charpos; | |
0a9dc68b | 1243 | Lisp_Object string; |
0a9dc68b | 1244 | { |
5f5c8ee5 GM |
1245 | struct text_pos pos; |
1246 | xassert (STRINGP (string)); | |
1247 | xassert (charpos >= 0); | |
1248 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1249 | return pos; | |
1250 | } | |
1251 | ||
1252 | ||
1253 | /* Value is a text position, i.e. character and byte position, for | |
1254 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1255 | means recognize multibyte characters. */ | |
1256 | ||
1257 | static struct text_pos | |
1258 | c_string_pos (charpos, s, multibyte_p) | |
1259 | int charpos; | |
1260 | unsigned char *s; | |
1261 | int multibyte_p; | |
1262 | { | |
1263 | struct text_pos pos; | |
1264 | ||
1265 | xassert (s != NULL); | |
1266 | xassert (charpos >= 0); | |
1267 | ||
1268 | if (multibyte_p) | |
0a9dc68b | 1269 | { |
5f5c8ee5 GM |
1270 | int rest = strlen (s), len; |
1271 | ||
1272 | SET_TEXT_POS (pos, 0, 0); | |
1273 | while (charpos--) | |
0a9dc68b | 1274 | { |
4fdb80f2 | 1275 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1276 | s += len, rest -= len; |
1277 | xassert (rest >= 0); | |
1278 | CHARPOS (pos) += 1; | |
1279 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1280 | } |
1281 | } | |
5f5c8ee5 GM |
1282 | else |
1283 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1284 | |
5f5c8ee5 GM |
1285 | return pos; |
1286 | } | |
0a9dc68b | 1287 | |
0a9dc68b | 1288 | |
5f5c8ee5 GM |
1289 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1290 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1291 | |
5f5c8ee5 GM |
1292 | static int |
1293 | number_of_chars (s, multibyte_p) | |
1294 | unsigned char *s; | |
1295 | int multibyte_p; | |
1296 | { | |
1297 | int nchars; | |
2311178e | 1298 | |
5f5c8ee5 GM |
1299 | if (multibyte_p) |
1300 | { | |
1301 | int rest = strlen (s), len; | |
1302 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1303 | |
5f5c8ee5 GM |
1304 | for (nchars = 0; rest > 0; ++nchars) |
1305 | { | |
4fdb80f2 | 1306 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1307 | rest -= len, p += len; |
0a9dc68b RS |
1308 | } |
1309 | } | |
5f5c8ee5 GM |
1310 | else |
1311 | nchars = strlen (s); | |
1312 | ||
1313 | return nchars; | |
0b1005ef KH |
1314 | } |
1315 | ||
2311178e | 1316 | |
5f5c8ee5 GM |
1317 | /* Compute byte position NEWPOS->bytepos corresponding to |
1318 | NEWPOS->charpos. POS is a known position in string STRING. | |
1319 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1320 | |
5f5c8ee5 GM |
1321 | static void |
1322 | compute_string_pos (newpos, pos, string) | |
1323 | struct text_pos *newpos, pos; | |
1324 | Lisp_Object string; | |
76412d64 | 1325 | { |
5f5c8ee5 GM |
1326 | xassert (STRINGP (string)); |
1327 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
2311178e | 1328 | |
5f5c8ee5 | 1329 | if (STRING_MULTIBYTE (string)) |
6fc556fd KR |
1330 | *newpos = string_pos_nchars_ahead (pos, string, |
1331 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1332 | else |
1333 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1334 | } |
1335 | ||
9c74a0dd | 1336 | |
5f5c8ee5 GM |
1337 | \f |
1338 | /*********************************************************************** | |
1339 | Lisp form evaluation | |
1340 | ***********************************************************************/ | |
1341 | ||
116d6f5c | 1342 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
1343 | |
1344 | static Lisp_Object | |
116d6f5c | 1345 | safe_eval_handler (arg) |
5f5c8ee5 GM |
1346 | Lisp_Object arg; |
1347 | { | |
0dbf9fd2 | 1348 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
1349 | return Qnil; |
1350 | } | |
1351 | ||
1352 | ||
1353 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 1354 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 1355 | |
71e5b1b8 | 1356 | Lisp_Object |
116d6f5c | 1357 | safe_eval (sexpr) |
5f5c8ee5 GM |
1358 | Lisp_Object sexpr; |
1359 | { | |
5f5c8ee5 | 1360 | Lisp_Object val; |
2311178e | 1361 | |
30a3f61c GM |
1362 | if (inhibit_eval_during_redisplay) |
1363 | val = Qnil; | |
1364 | else | |
1365 | { | |
331379bf | 1366 | int count = SPECPDL_INDEX (); |
30a3f61c | 1367 | struct gcpro gcpro1; |
0d8b31c0 | 1368 | |
30a3f61c GM |
1369 | GCPRO1 (sexpr); |
1370 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1371 | /* Use Qt to ensure debugger does not run, |
1372 | so there is no possibility of wanting to redisplay. */ | |
1373 | val = internal_condition_case_1 (Feval, sexpr, Qt, | |
30a3f61c GM |
1374 | safe_eval_handler); |
1375 | UNGCPRO; | |
1376 | val = unbind_to (count, val); | |
1377 | } | |
2311178e | 1378 | |
30a3f61c | 1379 | return val; |
0d8b31c0 GM |
1380 | } |
1381 | ||
1382 | ||
1383 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
1384 | Return the result, or nil if something went wrong. Prevent |
1385 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
1386 | |
1387 | Lisp_Object | |
116d6f5c | 1388 | safe_call (nargs, args) |
0d8b31c0 GM |
1389 | int nargs; |
1390 | Lisp_Object *args; | |
1391 | { | |
0d8b31c0 | 1392 | Lisp_Object val; |
2311178e | 1393 | |
30a3f61c GM |
1394 | if (inhibit_eval_during_redisplay) |
1395 | val = Qnil; | |
1396 | else | |
1397 | { | |
331379bf | 1398 | int count = SPECPDL_INDEX (); |
30a3f61c | 1399 | struct gcpro gcpro1; |
0d8b31c0 | 1400 | |
30a3f61c GM |
1401 | GCPRO1 (args[0]); |
1402 | gcpro1.nvars = nargs; | |
1403 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1404 | /* Use Qt to ensure debugger does not run, |
1405 | so there is no possibility of wanting to redisplay. */ | |
1406 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qt, | |
30a3f61c GM |
1407 | safe_eval_handler); |
1408 | UNGCPRO; | |
1409 | val = unbind_to (count, val); | |
1410 | } | |
1411 | ||
1412 | return val; | |
5f5c8ee5 GM |
1413 | } |
1414 | ||
1415 | ||
116d6f5c GM |
1416 | /* Call function FN with one argument ARG. |
1417 | Return the result, or nil if something went wrong. */ | |
1418 | ||
1419 | Lisp_Object | |
1420 | safe_call1 (fn, arg) | |
1421 | Lisp_Object fn, arg; | |
1422 | { | |
1423 | Lisp_Object args[2]; | |
1424 | args[0] = fn; | |
1425 | args[1] = arg; | |
1426 | return safe_call (2, args); | |
1427 | } | |
1428 | ||
1429 | ||
5f5c8ee5 GM |
1430 | \f |
1431 | /*********************************************************************** | |
1432 | Debugging | |
1433 | ***********************************************************************/ | |
1434 | ||
1435 | #if 0 | |
1436 | ||
1437 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1438 | This is for debugging. It is too slow to do unconditionally. */ | |
1439 | ||
1440 | static void | |
1441 | check_it (it) | |
1442 | struct it *it; | |
1443 | { | |
1444 | if (it->method == next_element_from_string) | |
a2889657 | 1445 | { |
5f5c8ee5 GM |
1446 | xassert (STRINGP (it->string)); |
1447 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1448 | } | |
1449 | else if (it->method == next_element_from_buffer) | |
1450 | { | |
1451 | /* Check that character and byte positions agree. */ | |
1452 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1453 | } | |
73af359d | 1454 | |
5f5c8ee5 GM |
1455 | if (it->dpvec) |
1456 | xassert (it->current.dpvec_index >= 0); | |
1457 | else | |
1458 | xassert (it->current.dpvec_index < 0); | |
1459 | } | |
1f40cad2 | 1460 | |
5f5c8ee5 GM |
1461 | #define CHECK_IT(IT) check_it ((IT)) |
1462 | ||
1463 | #else /* not 0 */ | |
1464 | ||
1465 | #define CHECK_IT(IT) (void) 0 | |
1466 | ||
1467 | #endif /* not 0 */ | |
1468 | ||
1469 | ||
1470 | #if GLYPH_DEBUG | |
1471 | ||
1472 | /* Check that the window end of window W is what we expect it | |
1473 | to be---the last row in the current matrix displaying text. */ | |
1474 | ||
1475 | static void | |
1476 | check_window_end (w) | |
1477 | struct window *w; | |
1478 | { | |
1479 | if (!MINI_WINDOW_P (w) | |
1480 | && !NILP (w->window_end_valid)) | |
1481 | { | |
1482 | struct glyph_row *row; | |
1483 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1484 | XFASTINT (w->window_end_vpos)), | |
1485 | !row->enabled_p | |
1486 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1487 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1492 | ||
1493 | #else /* not GLYPH_DEBUG */ | |
1494 | ||
1495 | #define CHECK_WINDOW_END(W) (void) 0 | |
1496 | ||
1497 | #endif /* not GLYPH_DEBUG */ | |
1498 | ||
1499 | ||
1500 | \f | |
1501 | /*********************************************************************** | |
1502 | Iterator initialization | |
1503 | ***********************************************************************/ | |
1504 | ||
1505 | /* Initialize IT for displaying current_buffer in window W, starting | |
1506 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1507 | position is specified which is useful when the iterator is assigned | |
1508 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 1509 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
1510 | |
1511 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1512 | will produce glyphs in that row. | |
1513 | ||
1514 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
96d2320f KS |
1515 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID, |
1516 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID for displaying | |
1517 | mode lines, or TOOL_BAR_FACE_ID for displaying the tool-bar. | |
2311178e | 1518 | |
96d2320f KS |
1519 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID, |
1520 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID, the iterator | |
1521 | will be initialized to use the corresponding mode line glyph row of | |
1522 | the desired matrix of W. */ | |
5f5c8ee5 GM |
1523 | |
1524 | void | |
1525 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1526 | struct it *it; | |
1527 | struct window *w; | |
1528 | int charpos, bytepos; | |
1529 | struct glyph_row *row; | |
1530 | enum face_id base_face_id; | |
1531 | { | |
1532 | int highlight_region_p; | |
5f5c8ee5 GM |
1533 | |
1534 | /* Some precondition checks. */ | |
1535 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
1536 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
1537 | && charpos <= ZV)); | |
5f5c8ee5 GM |
1538 | |
1539 | /* If face attributes have been changed since the last redisplay, | |
1540 | free realized faces now because they depend on face definitions | |
7d0393cf | 1541 | that might have changed. Don't free faces while there might be |
1987b083 | 1542 | desired matrices pending which reference these faces. */ |
26683087 | 1543 | if (face_change_count && !inhibit_free_realized_faces) |
5f5c8ee5 GM |
1544 | { |
1545 | face_change_count = 0; | |
1546 | free_all_realized_faces (Qnil); | |
1547 | } | |
1548 | ||
1549 | /* Use one of the mode line rows of W's desired matrix if | |
1550 | appropriate. */ | |
1551 | if (row == NULL) | |
1552 | { | |
96d2320f KS |
1553 | if (base_face_id == MODE_LINE_FACE_ID |
1554 | || base_face_id == MODE_LINE_INACTIVE_FACE_ID) | |
5f5c8ee5 | 1555 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); |
045dee35 GM |
1556 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1557 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 | 1558 | } |
2311178e | 1559 | |
5f5c8ee5 GM |
1560 | /* Clear IT. */ |
1561 | bzero (it, sizeof *it); | |
1562 | it->current.overlay_string_index = -1; | |
1563 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1564 | it->base_face_id = base_face_id; |
1565 | ||
1566 | /* The window in which we iterate over current_buffer: */ | |
1567 | XSETWINDOW (it->window, w); | |
1568 | it->w = w; | |
1569 | it->f = XFRAME (w->frame); | |
1570 | ||
d475bcb8 GM |
1571 | /* Extra space between lines (on window systems only). */ |
1572 | if (base_face_id == DEFAULT_FACE_ID | |
1573 | && FRAME_WINDOW_P (it->f)) | |
1574 | { | |
1575 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1576 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1577 | else if (it->f->extra_line_spacing > 0) | |
1578 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1579 | } | |
1580 | ||
5f5c8ee5 | 1581 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
1582 | attribute changes of named faces, recompute them. When running |
1583 | in batch mode, the face cache of Vterminal_frame is null. If | |
1584 | we happen to get called, make a dummy face cache. */ | |
9010e6b1 AI |
1585 | if ( |
1586 | #ifndef WINDOWSNT | |
1587 | noninteractive && | |
1588 | #endif | |
1589 | FRAME_FACE_CACHE (it->f) == NULL) | |
62be9979 | 1590 | init_frame_faces (it->f); |
5f5c8ee5 GM |
1591 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
1592 | recompute_basic_faces (it->f); | |
1593 | ||
5f5c8ee5 GM |
1594 | /* Current value of the `space-width', and 'height' properties. */ |
1595 | it->space_width = Qnil; | |
1596 | it->font_height = Qnil; | |
2311178e | 1597 | |
5f5c8ee5 GM |
1598 | /* Are control characters displayed as `^C'? */ |
1599 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1600 | ||
1601 | /* -1 means everything between a CR and the following line end | |
1602 | is invisible. >0 means lines indented more than this value are | |
1603 | invisible. */ | |
1604 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1605 | ? XFASTINT (current_buffer->selective_display) | |
2311178e | 1606 | : (!NILP (current_buffer->selective_display) |
5f5c8ee5 GM |
1607 | ? -1 : 0)); |
1608 | it->selective_display_ellipsis_p | |
1609 | = !NILP (current_buffer->selective_display_ellipses); | |
1610 | ||
1611 | /* Display table to use. */ | |
1612 | it->dp = window_display_table (w); | |
1613 | ||
1614 | /* Are multibyte characters enabled in current_buffer? */ | |
1615 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1616 | ||
1617 | /* Non-zero if we should highlight the region. */ | |
1618 | highlight_region_p | |
3ebf0ea9 | 1619 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
1620 | && !NILP (current_buffer->mark_active) |
1621 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1622 | ||
1623 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1624 | start and end of a visible region in window IT->w. Set both to | |
1625 | -1 to indicate no region. */ | |
1626 | if (highlight_region_p | |
1627 | /* Maybe highlight only in selected window. */ | |
2311178e | 1628 | && (/* Either show region everywhere. */ |
5f5c8ee5 GM |
1629 | highlight_nonselected_windows |
1630 | /* Or show region in the selected window. */ | |
1631 | || w == XWINDOW (selected_window) | |
1632 | /* Or show the region if we are in the mini-buffer and W is | |
1633 | the window the mini-buffer refers to. */ | |
1634 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
5705966b KS |
1635 | && WINDOWP (minibuf_selected_window) |
1636 | && w == XWINDOW (minibuf_selected_window)))) | |
5f5c8ee5 GM |
1637 | { |
1638 | int charpos = marker_position (current_buffer->mark); | |
1639 | it->region_beg_charpos = min (PT, charpos); | |
1640 | it->region_end_charpos = max (PT, charpos); | |
1641 | } | |
1642 | else | |
1643 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1644 | ||
1645 | /* Get the position at which the redisplay_end_trigger hook should | |
1646 | be run, if it is to be run at all. */ | |
1647 | if (MARKERP (w->redisplay_end_trigger) | |
1648 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1649 | it->redisplay_end_trigger_charpos | |
1650 | = marker_position (w->redisplay_end_trigger); | |
1651 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1652 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1653 | ||
1654 | /* Correct bogus values of tab_width. */ | |
1655 | it->tab_width = XINT (current_buffer->tab_width); | |
1656 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1657 | it->tab_width = 8; | |
1658 | ||
1659 | /* Are lines in the display truncated? */ | |
1660 | it->truncate_lines_p | |
1661 | = (base_face_id != DEFAULT_FACE_ID | |
1662 | || XINT (it->w->hscroll) | |
1663 | || (truncate_partial_width_windows | |
1664 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1665 | || !NILP (current_buffer->truncate_lines)); | |
1666 | ||
1667 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 1668 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
1669 | frames. */ |
1670 | if (!FRAME_WINDOW_P (it->f)) | |
1671 | { | |
1672 | if (it->truncate_lines_p) | |
1673 | { | |
1674 | /* We will need the truncation glyph. */ | |
1675 | xassert (it->glyph_row == NULL); | |
1676 | produce_special_glyphs (it, IT_TRUNCATION); | |
1677 | it->truncation_pixel_width = it->pixel_width; | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | /* We will need the continuation glyph. */ | |
1682 | xassert (it->glyph_row == NULL); | |
1683 | produce_special_glyphs (it, IT_CONTINUATION); | |
1684 | it->continuation_pixel_width = it->pixel_width; | |
1685 | } | |
1686 | ||
153c2160 | 1687 | /* Reset these values to zero because the produce_special_glyphs |
5f5c8ee5 GM |
1688 | above has changed them. */ |
1689 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1690 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1691 | } |
1692 | ||
1693 | /* Set this after getting the dimensions of truncation and | |
1694 | continuation glyphs, so that we don't produce glyphs when calling | |
1695 | produce_special_glyphs, above. */ | |
1696 | it->glyph_row = row; | |
1697 | it->area = TEXT_AREA; | |
1698 | ||
1699 | /* Get the dimensions of the display area. The display area | |
1700 | consists of the visible window area plus a horizontally scrolled | |
1701 | part to the left of the window. All x-values are relative to the | |
1702 | start of this total display area. */ | |
1703 | if (base_face_id != DEFAULT_FACE_ID) | |
1704 | { | |
1705 | /* Mode lines, menu bar in terminal frames. */ | |
1706 | it->first_visible_x = 0; | |
1707 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1708 | } | |
1709 | else | |
1710 | { | |
1711 | it->first_visible_x | |
1712 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1713 | it->last_visible_x = (it->first_visible_x | |
1714 | + window_box_width (w, TEXT_AREA)); | |
1715 | ||
1716 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1717 | the right margin. Otherwise, leave room for the continuation | |
1718 | glyph(s). Truncation and continuation glyphs are not inserted | |
1719 | for window-based redisplay. */ | |
1720 | if (!FRAME_WINDOW_P (it->f)) | |
1721 | { | |
1722 | if (it->truncate_lines_p) | |
1723 | it->last_visible_x -= it->truncation_pixel_width; | |
1724 | else | |
1725 | it->last_visible_x -= it->continuation_pixel_width; | |
1726 | } | |
1727 | ||
045dee35 GM |
1728 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1729 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1730 | } |
1731 | ||
1732 | /* Leave room for a border glyph. */ | |
1733 | if (!FRAME_WINDOW_P (it->f) | |
1734 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1735 | it->last_visible_x -= 1; | |
1736 | ||
1737 | it->last_visible_y = window_text_bottom_y (w); | |
1738 | ||
1739 | /* For mode lines and alike, arrange for the first glyph having a | |
1740 | left box line if the face specifies a box. */ | |
1741 | if (base_face_id != DEFAULT_FACE_ID) | |
1742 | { | |
1743 | struct face *face; | |
2311178e | 1744 | |
5f5c8ee5 GM |
1745 | it->face_id = base_face_id; |
1746 | ||
1747 | /* If we have a boxed mode line, make the first character appear | |
1748 | with a left box line. */ | |
1749 | face = FACE_FROM_ID (it->f, base_face_id); | |
1750 | if (face->box != FACE_NO_BOX) | |
1751 | it->start_of_box_run_p = 1; | |
1752 | } | |
1753 | ||
1754 | /* If a buffer position was specified, set the iterator there, | |
1755 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 1756 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
1757 | { |
1758 | it->end_charpos = ZV; | |
1759 | it->face_id = -1; | |
1760 | IT_CHARPOS (*it) = charpos; | |
2311178e | 1761 | |
5f5c8ee5 | 1762 | /* Compute byte position if not specified. */ |
3ebf0ea9 | 1763 | if (bytepos < charpos) |
5f5c8ee5 GM |
1764 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
1765 | else | |
1766 | IT_BYTEPOS (*it) = bytepos; | |
1767 | ||
1768 | /* Compute faces etc. */ | |
1769 | reseat (it, it->current.pos, 1); | |
1770 | } | |
2311178e | 1771 | |
5f5c8ee5 GM |
1772 | CHECK_IT (it); |
1773 | } | |
1774 | ||
1775 | ||
1776 | /* Initialize IT for the display of window W with window start POS. */ | |
1777 | ||
1778 | void | |
1779 | start_display (it, w, pos) | |
1780 | struct it *it; | |
1781 | struct window *w; | |
1782 | struct text_pos pos; | |
1783 | { | |
5f5c8ee5 | 1784 | struct glyph_row *row; |
045dee35 | 1785 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1786 | |
1787 | row = w->desired_matrix->rows + first_vpos; | |
1788 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
17fdcfc8 GM |
1789 | |
1790 | if (!it->truncate_lines_p) | |
5f5c8ee5 | 1791 | { |
17fdcfc8 GM |
1792 | int start_at_line_beg_p; |
1793 | int first_y = it->current_y; | |
2311178e | 1794 | |
17fdcfc8 GM |
1795 | /* If window start is not at a line start, skip forward to POS to |
1796 | get the correct continuation lines width. */ | |
1797 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1798 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1799 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 1800 | { |
0e47bbf7 RS |
1801 | int new_x; |
1802 | ||
17fdcfc8 GM |
1803 | reseat_at_previous_visible_line_start (it); |
1804 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1805 | ||
0e47bbf7 RS |
1806 | new_x = it->current_x + it->pixel_width; |
1807 | ||
17fdcfc8 GM |
1808 | /* If lines are continued, this line may end in the middle |
1809 | of a multi-glyph character (e.g. a control character | |
1810 | displayed as \003, or in the middle of an overlay | |
1811 | string). In this case move_it_to above will not have | |
1812 | taken us to the start of the continuation line but to the | |
1813 | end of the continued line. */ | |
0e47bbf7 RS |
1814 | if (it->current_x > 0 |
1815 | && !it->truncate_lines_p /* Lines are continued. */ | |
1816 | && (/* And glyph doesn't fit on the line. */ | |
1817 | new_x > it->last_visible_x | |
1818 | /* Or it fits exactly and we're on a window | |
1819 | system frame. */ | |
1820 | || (new_x == it->last_visible_x | |
1821 | && FRAME_WINDOW_P (it->f)))) | |
5f5c8ee5 | 1822 | { |
b28cb6ed GM |
1823 | if (it->current.dpvec_index >= 0 |
1824 | || it->current.overlay_string_index >= 0) | |
1825 | { | |
cafafe0b | 1826 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
1827 | move_it_in_display_line_to (it, -1, -1, 0); |
1828 | } | |
2311178e | 1829 | |
b28cb6ed | 1830 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 1831 | } |
b28cb6ed GM |
1832 | |
1833 | /* We're starting a new display line, not affected by the | |
1834 | height of the continued line, so clear the appropriate | |
1835 | fields in the iterator structure. */ | |
1836 | it->max_ascent = it->max_descent = 0; | |
1837 | it->max_phys_ascent = it->max_phys_descent = 0; | |
2311178e | 1838 | |
17fdcfc8 GM |
1839 | it->current_y = first_y; |
1840 | it->vpos = 0; | |
1841 | it->current_x = it->hpos = 0; | |
1842 | } | |
5f5c8ee5 GM |
1843 | } |
1844 | ||
1845 | #if 0 /* Don't assert the following because start_display is sometimes | |
1846 | called intentionally with a window start that is not at a | |
1847 | line start. Please leave this code in as a comment. */ | |
2311178e | 1848 | |
5f5c8ee5 GM |
1849 | /* Window start should be on a line start, now. */ |
1850 | xassert (it->continuation_lines_width | |
1851 | || IT_CHARPOS (it) == BEGV | |
1852 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1853 | #endif /* 0 */ | |
1854 | } | |
1855 | ||
1856 | ||
4bde0ebb GM |
1857 | /* Return 1 if POS is a position in ellipses displayed for invisible |
1858 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 1859 | |
4bde0ebb GM |
1860 | static int |
1861 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 1862 | struct display_pos *pos; |
4bde0ebb | 1863 | struct window *w; |
5f5c8ee5 | 1864 | { |
ac90c44f | 1865 | Lisp_Object prop, window; |
4bde0ebb GM |
1866 | int ellipses_p = 0; |
1867 | int charpos = CHARPOS (pos->pos); | |
2311178e | 1868 | |
ac90c44f GM |
1869 | /* If POS specifies a position in a display vector, this might |
1870 | be for an ellipsis displayed for invisible text. We won't | |
1871 | get the iterator set up for delivering that ellipsis unless | |
1872 | we make sure that it gets aware of the invisible text. */ | |
1873 | if (pos->dpvec_index >= 0 | |
1874 | && pos->overlay_string_index < 0 | |
1875 | && CHARPOS (pos->string_pos) < 0 | |
1876 | && charpos > BEGV | |
1877 | && (XSETWINDOW (window, w), | |
1878 | prop = Fget_char_property (make_number (charpos), | |
1879 | Qinvisible, window), | |
20fbd925 | 1880 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
1881 | { |
1882 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
1883 | window); | |
8580a4e3 | 1884 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
1885 | } |
1886 | ||
1887 | return ellipses_p; | |
1888 | } | |
1889 | ||
1890 | ||
1891 | /* Initialize IT for stepping through current_buffer in window W, | |
1892 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
1893 | vector/ control character translation position information. Value |
1894 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 1895 | |
47d57b22 | 1896 | static int |
4bde0ebb GM |
1897 | init_from_display_pos (it, w, pos) |
1898 | struct it *it; | |
1899 | struct window *w; | |
1900 | struct display_pos *pos; | |
1901 | { | |
1902 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 1903 | int i, overlay_strings_with_newlines = 0; |
2311178e | 1904 | |
4bde0ebb GM |
1905 | /* If POS specifies a position in a display vector, this might |
1906 | be for an ellipsis displayed for invisible text. We won't | |
1907 | get the iterator set up for delivering that ellipsis unless | |
1908 | we make sure that it gets aware of the invisible text. */ | |
1909 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
1910 | { | |
1911 | --charpos; | |
1912 | bytepos = 0; | |
ac90c44f | 1913 | } |
2311178e | 1914 | |
5f5c8ee5 GM |
1915 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
1916 | text, so we might end up at a position different from POS. This | |
1917 | is only a problem when POS is a row start after a newline and an | |
1918 | overlay starts there with an after-string, and the overlay has an | |
1919 | invisible property. Since we don't skip invisible text in | |
1920 | display_line and elsewhere immediately after consuming the | |
1921 | newline before the row start, such a POS will not be in a string, | |
1922 | but the call to init_iterator below will move us to the | |
1923 | after-string. */ | |
ac90c44f | 1924 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 1925 | |
47d57b22 | 1926 | for (i = 0; i < it->n_overlay_strings; ++i) |
1e1e5daf | 1927 | { |
50f80c2f KR |
1928 | const char *s = SDATA (it->overlay_strings[i]); |
1929 | const char *e = s + SBYTES (it->overlay_strings[i]); | |
2311178e | 1930 | |
1e1e5daf GM |
1931 | while (s < e && *s != '\n') |
1932 | ++s; | |
1933 | ||
1934 | if (s < e) | |
1935 | { | |
1936 | overlay_strings_with_newlines = 1; | |
1937 | break; | |
1938 | } | |
1939 | } | |
47d57b22 | 1940 | |
75c5350a GM |
1941 | /* If position is within an overlay string, set up IT to the right |
1942 | overlay string. */ | |
5f5c8ee5 GM |
1943 | if (pos->overlay_string_index >= 0) |
1944 | { | |
1945 | int relative_index; | |
75c5350a GM |
1946 | |
1947 | /* If the first overlay string happens to have a `display' | |
1948 | property for an image, the iterator will be set up for that | |
1949 | image, and we have to undo that setup first before we can | |
1950 | correct the overlay string index. */ | |
1951 | if (it->method == next_element_from_image) | |
1952 | pop_it (it); | |
2311178e | 1953 | |
5f5c8ee5 GM |
1954 | /* We already have the first chunk of overlay strings in |
1955 | IT->overlay_strings. Load more until the one for | |
1956 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1957 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1958 | { | |
1959 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1960 | it->current.overlay_string_index = 0; | |
1961 | while (n--) | |
1962 | { | |
5a08cbaf | 1963 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
1964 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
1965 | } | |
1966 | } | |
2311178e | 1967 | |
5f5c8ee5 GM |
1968 | it->current.overlay_string_index = pos->overlay_string_index; |
1969 | relative_index = (it->current.overlay_string_index | |
1970 | % OVERLAY_STRING_CHUNK_SIZE); | |
1971 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 1972 | xassert (STRINGP (it->string)); |
5f5c8ee5 GM |
1973 | it->current.string_pos = pos->string_pos; |
1974 | it->method = next_element_from_string; | |
1975 | } | |
2311178e | 1976 | |
1e1e5daf GM |
1977 | #if 0 /* This is bogus because POS not having an overlay string |
1978 | position does not mean it's after the string. Example: A | |
1979 | line starting with a before-string and initialization of IT | |
1980 | to the previous row's end position. */ | |
2be8f184 GM |
1981 | else if (it->current.overlay_string_index >= 0) |
1982 | { | |
1983 | /* If POS says we're already after an overlay string ending at | |
1984 | POS, make sure to pop the iterator because it will be in | |
1985 | front of that overlay string. When POS is ZV, we've thereby | |
1986 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
1987 | while (it->sp) |
1988 | pop_it (it); | |
2be8f184 GM |
1989 | it->current.overlay_string_index = -1; |
1990 | it->method = next_element_from_buffer; | |
1991 | if (CHARPOS (pos->pos) == ZV) | |
1992 | it->overlay_strings_at_end_processed_p = 1; | |
1993 | } | |
1e1e5daf | 1994 | #endif /* 0 */ |
2311178e | 1995 | |
2be8f184 | 1996 | if (CHARPOS (pos->string_pos) >= 0) |
5f5c8ee5 GM |
1997 | { |
1998 | /* Recorded position is not in an overlay string, but in another | |
1999 | string. This can only be a string from a `display' property. | |
2000 | IT should already be filled with that string. */ | |
2001 | it->current.string_pos = pos->string_pos; | |
2002 | xassert (STRINGP (it->string)); | |
2003 | } | |
2004 | ||
ac90c44f GM |
2005 | /* Restore position in display vector translations, control |
2006 | character translations or ellipses. */ | |
5f5c8ee5 GM |
2007 | if (pos->dpvec_index >= 0) |
2008 | { | |
ac90c44f GM |
2009 | if (it->dpvec == NULL) |
2010 | get_next_display_element (it); | |
5f5c8ee5 GM |
2011 | xassert (it->dpvec && it->current.dpvec_index == 0); |
2012 | it->current.dpvec_index = pos->dpvec_index; | |
2013 | } | |
2311178e | 2014 | |
5f5c8ee5 | 2015 | CHECK_IT (it); |
47d57b22 | 2016 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
2017 | } |
2018 | ||
2019 | ||
2020 | /* Initialize IT for stepping through current_buffer in window W | |
2021 | starting at ROW->start. */ | |
2022 | ||
2023 | static void | |
2024 | init_to_row_start (it, w, row) | |
2025 | struct it *it; | |
2026 | struct window *w; | |
2027 | struct glyph_row *row; | |
2028 | { | |
2029 | init_from_display_pos (it, w, &row->start); | |
2030 | it->continuation_lines_width = row->continuation_lines_width; | |
2031 | CHECK_IT (it); | |
2032 | } | |
2033 | ||
2311178e | 2034 | |
5f5c8ee5 | 2035 | /* Initialize IT for stepping through current_buffer in window W |
47d57b22 GM |
2036 | starting in the line following ROW, i.e. starting at ROW->end. |
2037 | Value is zero if there are overlay strings with newlines at ROW's | |
2038 | end position. */ | |
5f5c8ee5 | 2039 | |
47d57b22 | 2040 | static int |
5f5c8ee5 GM |
2041 | init_to_row_end (it, w, row) |
2042 | struct it *it; | |
2043 | struct window *w; | |
2044 | struct glyph_row *row; | |
2045 | { | |
47d57b22 | 2046 | int success = 0; |
2311178e | 2047 | |
47d57b22 GM |
2048 | if (init_from_display_pos (it, w, &row->end)) |
2049 | { | |
2050 | if (row->continued_p) | |
2051 | it->continuation_lines_width | |
2052 | = row->continuation_lines_width + row->pixel_width; | |
2053 | CHECK_IT (it); | |
2054 | success = 1; | |
2055 | } | |
2311178e | 2056 | |
47d57b22 | 2057 | return success; |
5f5c8ee5 GM |
2058 | } |
2059 | ||
2060 | ||
2061 | ||
2062 | \f | |
2063 | /*********************************************************************** | |
2064 | Text properties | |
2065 | ***********************************************************************/ | |
2066 | ||
2067 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
2068 | overlay changes. Set IT->stop_charpos to the next position where | |
2069 | to stop. */ | |
2070 | ||
2071 | static void | |
2072 | handle_stop (it) | |
2073 | struct it *it; | |
2074 | { | |
2075 | enum prop_handled handled; | |
2076 | int handle_overlay_change_p = 1; | |
2077 | struct props *p; | |
2078 | ||
2079 | it->dpvec = NULL; | |
2080 | it->current.dpvec_index = -1; | |
2081 | ||
2082 | do | |
2083 | { | |
2084 | handled = HANDLED_NORMALLY; | |
2311178e | 2085 | |
5f5c8ee5 GM |
2086 | /* Call text property handlers. */ |
2087 | for (p = it_props; p->handler; ++p) | |
2088 | { | |
2089 | handled = p->handler (it); | |
2970b9be | 2090 | |
5f5c8ee5 GM |
2091 | if (handled == HANDLED_RECOMPUTE_PROPS) |
2092 | break; | |
2093 | else if (handled == HANDLED_RETURN) | |
2094 | return; | |
2095 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
2096 | handle_overlay_change_p = 0; | |
2097 | } | |
2098 | ||
2099 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
2100 | { | |
2101 | /* Don't check for overlay strings below when set to deliver | |
2102 | characters from a display vector. */ | |
2103 | if (it->method == next_element_from_display_vector) | |
2104 | handle_overlay_change_p = 0; | |
2105 | ||
2106 | /* Handle overlay changes. */ | |
2107 | if (handle_overlay_change_p) | |
2108 | handled = handle_overlay_change (it); | |
2311178e | 2109 | |
5f5c8ee5 GM |
2110 | /* Determine where to stop next. */ |
2111 | if (handled == HANDLED_NORMALLY) | |
2112 | compute_stop_pos (it); | |
2113 | } | |
2114 | } | |
2115 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
2116 | } | |
2117 | ||
2118 | ||
2119 | /* Compute IT->stop_charpos from text property and overlay change | |
2120 | information for IT's current position. */ | |
2121 | ||
2122 | static void | |
2123 | compute_stop_pos (it) | |
2124 | struct it *it; | |
2125 | { | |
2126 | register INTERVAL iv, next_iv; | |
2127 | Lisp_Object object, limit, position; | |
2128 | ||
2129 | /* If nowhere else, stop at the end. */ | |
2130 | it->stop_charpos = it->end_charpos; | |
2311178e | 2131 | |
5f5c8ee5 GM |
2132 | if (STRINGP (it->string)) |
2133 | { | |
2134 | /* Strings are usually short, so don't limit the search for | |
2135 | properties. */ | |
2136 | object = it->string; | |
2137 | limit = Qnil; | |
ac90c44f | 2138 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2139 | } |
2140 | else | |
2141 | { | |
2142 | int charpos; | |
2143 | ||
2144 | /* If next overlay change is in front of the current stop pos | |
2145 | (which is IT->end_charpos), stop there. Note: value of | |
2146 | next_overlay_change is point-max if no overlay change | |
2147 | follows. */ | |
2148 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
2149 | if (charpos < it->stop_charpos) | |
2150 | it->stop_charpos = charpos; | |
2151 | ||
2152 | /* If showing the region, we have to stop at the region | |
2153 | start or end because the face might change there. */ | |
2154 | if (it->region_beg_charpos > 0) | |
2155 | { | |
2156 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
2157 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
2158 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
2159 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
2160 | } | |
2311178e | 2161 | |
5f5c8ee5 GM |
2162 | /* Set up variables for computing the stop position from text |
2163 | property changes. */ | |
2164 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
2165 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
2166 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
2167 | |
2168 | } | |
2169 | ||
2170 | /* Get the interval containing IT's position. Value is a null | |
2171 | interval if there isn't such an interval. */ | |
2172 | iv = validate_interval_range (object, &position, &position, 0); | |
2173 | if (!NULL_INTERVAL_P (iv)) | |
2174 | { | |
2175 | Lisp_Object values_here[LAST_PROP_IDX]; | |
2176 | struct props *p; | |
2177 | ||
2178 | /* Get properties here. */ | |
2179 | for (p = it_props; p->handler; ++p) | |
2180 | values_here[p->idx] = textget (iv->plist, *p->name); | |
2181 | ||
2182 | /* Look for an interval following iv that has different | |
2183 | properties. */ | |
2184 | for (next_iv = next_interval (iv); | |
2185 | (!NULL_INTERVAL_P (next_iv) | |
2186 | && (NILP (limit) | |
2187 | || XFASTINT (limit) > next_iv->position)); | |
2188 | next_iv = next_interval (next_iv)) | |
2189 | { | |
2190 | for (p = it_props; p->handler; ++p) | |
2191 | { | |
2192 | Lisp_Object new_value; | |
2193 | ||
2194 | new_value = textget (next_iv->plist, *p->name); | |
2195 | if (!EQ (values_here[p->idx], new_value)) | |
2196 | break; | |
2197 | } | |
2311178e | 2198 | |
5f5c8ee5 GM |
2199 | if (p->handler) |
2200 | break; | |
2201 | } | |
2202 | ||
2203 | if (!NULL_INTERVAL_P (next_iv)) | |
2204 | { | |
2205 | if (INTEGERP (limit) | |
2206 | && next_iv->position >= XFASTINT (limit)) | |
2207 | /* No text property change up to limit. */ | |
2208 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
2209 | else | |
2210 | /* Text properties change in next_iv. */ | |
2211 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | xassert (STRINGP (it->string) | |
2216 | || (it->stop_charpos >= BEGV | |
2217 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
2218 | } | |
2219 | ||
2220 | ||
2221 | /* Return the position of the next overlay change after POS in | |
2222 | current_buffer. Value is point-max if no overlay change | |
2223 | follows. This is like `next-overlay-change' but doesn't use | |
2224 | xmalloc. */ | |
2225 | ||
2226 | static int | |
2227 | next_overlay_change (pos) | |
2228 | int pos; | |
2229 | { | |
2230 | int noverlays; | |
2231 | int endpos; | |
2232 | Lisp_Object *overlays; | |
2233 | int len; | |
2234 | int i; | |
2235 | ||
2236 | /* Get all overlays at the given position. */ | |
2237 | len = 10; | |
2238 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2239 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2240 | if (noverlays > len) |
2241 | { | |
2242 | len = noverlays; | |
2243 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2244 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2245 | } |
2246 | ||
2247 | /* If any of these overlays ends before endpos, | |
2248 | use its ending point instead. */ | |
2249 | for (i = 0; i < noverlays; ++i) | |
2250 | { | |
2251 | Lisp_Object oend; | |
2252 | int oendpos; | |
2253 | ||
2254 | oend = OVERLAY_END (overlays[i]); | |
2255 | oendpos = OVERLAY_POSITION (oend); | |
2256 | endpos = min (endpos, oendpos); | |
2257 | } | |
2258 | ||
2259 | return endpos; | |
2260 | } | |
2261 | ||
2262 | ||
2263 | \f | |
2264 | /*********************************************************************** | |
2265 | Fontification | |
2266 | ***********************************************************************/ | |
2267 | ||
2268 | /* Handle changes in the `fontified' property of the current buffer by | |
2269 | calling hook functions from Qfontification_functions to fontify | |
2270 | regions of text. */ | |
2271 | ||
2272 | static enum prop_handled | |
2273 | handle_fontified_prop (it) | |
2274 | struct it *it; | |
2275 | { | |
2276 | Lisp_Object prop, pos; | |
2277 | enum prop_handled handled = HANDLED_NORMALLY; | |
2278 | ||
2279 | /* Get the value of the `fontified' property at IT's current buffer | |
2280 | position. (The `fontified' property doesn't have a special | |
2281 | meaning in strings.) If the value is nil, call functions from | |
2282 | Qfontification_functions. */ | |
2283 | if (!STRINGP (it->string) | |
2284 | && it->s == NULL | |
2285 | && !NILP (Vfontification_functions) | |
085536c2 | 2286 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
2287 | && (pos = make_number (IT_CHARPOS (*it)), |
2288 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
2289 | NILP (prop))) | |
2290 | { | |
331379bf | 2291 | int count = SPECPDL_INDEX (); |
085536c2 GM |
2292 | Lisp_Object val; |
2293 | ||
2294 | val = Vfontification_functions; | |
2295 | specbind (Qfontification_functions, Qnil); | |
2311178e | 2296 | |
085536c2 | 2297 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
116d6f5c | 2298 | safe_call1 (val, pos); |
085536c2 GM |
2299 | else |
2300 | { | |
2301 | Lisp_Object globals, fn; | |
2302 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 2303 | |
085536c2 GM |
2304 | globals = Qnil; |
2305 | GCPRO2 (val, globals); | |
2311178e | 2306 | |
085536c2 GM |
2307 | for (; CONSP (val); val = XCDR (val)) |
2308 | { | |
2309 | fn = XCAR (val); | |
2311178e | 2310 | |
085536c2 GM |
2311 | if (EQ (fn, Qt)) |
2312 | { | |
2313 | /* A value of t indicates this hook has a local | |
2314 | binding; it means to run the global binding too. | |
2315 | In a global value, t should not occur. If it | |
2316 | does, we must ignore it to avoid an endless | |
2317 | loop. */ | |
2318 | for (globals = Fdefault_value (Qfontification_functions); | |
2319 | CONSP (globals); | |
2320 | globals = XCDR (globals)) | |
2321 | { | |
2322 | fn = XCAR (globals); | |
2323 | if (!EQ (fn, Qt)) | |
116d6f5c | 2324 | safe_call1 (fn, pos); |
085536c2 GM |
2325 | } |
2326 | } | |
2327 | else | |
116d6f5c | 2328 | safe_call1 (fn, pos); |
085536c2 GM |
2329 | } |
2330 | ||
2331 | UNGCPRO; | |
2332 | } | |
2333 | ||
2334 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2335 | |
2336 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
2337 | something. This avoids an endless loop if they failed to | |
2338 | fontify the text for which reason ever. */ | |
2339 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
2340 | handled = HANDLED_RECOMPUTE_PROPS; | |
2341 | } | |
2342 | ||
2343 | return handled; | |
2344 | } | |
2345 | ||
2346 | ||
2347 | \f | |
2348 | /*********************************************************************** | |
2349 | Faces | |
2350 | ***********************************************************************/ | |
2351 | ||
2352 | /* Set up iterator IT from face properties at its current position. | |
2353 | Called from handle_stop. */ | |
2354 | ||
2355 | static enum prop_handled | |
2356 | handle_face_prop (it) | |
2357 | struct it *it; | |
2358 | { | |
2359 | int new_face_id, next_stop; | |
2311178e | 2360 | |
5f5c8ee5 GM |
2361 | if (!STRINGP (it->string)) |
2362 | { | |
2363 | new_face_id | |
2364 | = face_at_buffer_position (it->w, | |
2365 | IT_CHARPOS (*it), | |
2366 | it->region_beg_charpos, | |
2367 | it->region_end_charpos, | |
2368 | &next_stop, | |
2369 | (IT_CHARPOS (*it) | |
2370 | + TEXT_PROP_DISTANCE_LIMIT), | |
2371 | 0); | |
2311178e | 2372 | |
5f5c8ee5 GM |
2373 | /* Is this a start of a run of characters with box face? |
2374 | Caveat: this can be called for a freshly initialized | |
4b41cebb | 2375 | iterator; face_id is -1 in this case. We know that the new |
5f5c8ee5 GM |
2376 | face will not change until limit, i.e. if the new face has a |
2377 | box, all characters up to limit will have one. But, as | |
2378 | usual, we don't know whether limit is really the end. */ | |
2379 | if (new_face_id != it->face_id) | |
2380 | { | |
2381 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2311178e | 2382 | |
5f5c8ee5 GM |
2383 | /* If new face has a box but old face has not, this is |
2384 | the start of a run of characters with box, i.e. it has | |
2385 | a shadow on the left side. The value of face_id of the | |
2386 | iterator will be -1 if this is the initial call that gets | |
2387 | the face. In this case, we have to look in front of IT's | |
2388 | position and see whether there is a face != new_face_id. */ | |
2389 | it->start_of_box_run_p | |
2390 | = (new_face->box != FACE_NO_BOX | |
2391 | && (it->face_id >= 0 | |
2392 | || IT_CHARPOS (*it) == BEG | |
2393 | || new_face_id != face_before_it_pos (it))); | |
2394 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2395 | } | |
2396 | } | |
2397 | else | |
2398 | { | |
06a12811 GM |
2399 | int base_face_id, bufpos; |
2400 | ||
2401 | if (it->current.overlay_string_index >= 0) | |
2402 | bufpos = IT_CHARPOS (*it); | |
2403 | else | |
2404 | bufpos = 0; | |
2311178e | 2405 | |
06a12811 GM |
2406 | /* For strings from a buffer, i.e. overlay strings or strings |
2407 | from a `display' property, use the face at IT's current | |
2408 | buffer position as the base face to merge with, so that | |
2409 | overlay strings appear in the same face as surrounding | |
2410 | text, unless they specify their own faces. */ | |
2411 | base_face_id = underlying_face_id (it); | |
2311178e | 2412 | |
06a12811 GM |
2413 | new_face_id = face_at_string_position (it->w, |
2414 | it->string, | |
2415 | IT_STRING_CHARPOS (*it), | |
2416 | bufpos, | |
2417 | it->region_beg_charpos, | |
2418 | it->region_end_charpos, | |
2419 | &next_stop, | |
5de7c6f2 | 2420 | base_face_id, 0); |
2311178e | 2421 | |
5f5c8ee5 GM |
2422 | #if 0 /* This shouldn't be neccessary. Let's check it. */ |
2423 | /* If IT is used to display a mode line we would really like to | |
2424 | use the mode line face instead of the frame's default face. */ | |
2425 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2426 | && new_face_id == DEFAULT_FACE_ID) | |
96d2320f | 2427 | new_face_id = CURRENT_MODE_LINE_FACE_ID (it->w); |
5f5c8ee5 | 2428 | #endif |
2311178e | 2429 | |
5f5c8ee5 GM |
2430 | /* Is this a start of a run of characters with box? Caveat: |
2431 | this can be called for a freshly allocated iterator; face_id | |
2432 | is -1 is this case. We know that the new face will not | |
2433 | change until the next check pos, i.e. if the new face has a | |
2434 | box, all characters up to that position will have a | |
2435 | box. But, as usual, we don't know whether that position | |
2436 | is really the end. */ | |
2437 | if (new_face_id != it->face_id) | |
2438 | { | |
2439 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2440 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2311178e | 2441 | |
5f5c8ee5 GM |
2442 | /* If new face has a box but old face hasn't, this is the |
2443 | start of a run of characters with box, i.e. it has a | |
2444 | shadow on the left side. */ | |
2445 | it->start_of_box_run_p | |
2446 | = new_face->box && (old_face == NULL || !old_face->box); | |
2447 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2448 | } | |
2449 | } | |
2311178e | 2450 | |
5f5c8ee5 | 2451 | it->face_id = new_face_id; |
5f5c8ee5 GM |
2452 | return HANDLED_NORMALLY; |
2453 | } | |
2454 | ||
2455 | ||
06a12811 GM |
2456 | /* Return the ID of the face ``underlying'' IT's current position, |
2457 | which is in a string. If the iterator is associated with a | |
2458 | buffer, return the face at IT's current buffer position. | |
2459 | Otherwise, use the iterator's base_face_id. */ | |
2460 | ||
2461 | static int | |
2462 | underlying_face_id (it) | |
2463 | struct it *it; | |
2464 | { | |
2465 | int face_id = it->base_face_id, i; | |
2466 | ||
2467 | xassert (STRINGP (it->string)); | |
2468 | ||
2469 | for (i = it->sp - 1; i >= 0; --i) | |
2470 | if (NILP (it->stack[i].string)) | |
2471 | face_id = it->stack[i].face_id; | |
2472 | ||
2473 | return face_id; | |
2474 | } | |
2475 | ||
2476 | ||
5f5c8ee5 GM |
2477 | /* Compute the face one character before or after the current position |
2478 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2479 | position. Value is the id of the face. */ | |
2480 | ||
2481 | static int | |
2482 | face_before_or_after_it_pos (it, before_p) | |
2483 | struct it *it; | |
2484 | int before_p; | |
2485 | { | |
2486 | int face_id, limit; | |
2487 | int next_check_charpos; | |
2488 | struct text_pos pos; | |
2489 | ||
2490 | xassert (it->s == NULL); | |
2311178e | 2491 | |
5f5c8ee5 GM |
2492 | if (STRINGP (it->string)) |
2493 | { | |
06a12811 | 2494 | int bufpos, base_face_id; |
2311178e | 2495 | |
5f5c8ee5 GM |
2496 | /* No face change past the end of the string (for the case |
2497 | we are padding with spaces). No face change before the | |
2498 | string start. */ | |
2051c264 | 2499 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string) |
5f5c8ee5 GM |
2500 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) |
2501 | return it->face_id; | |
2502 | ||
2503 | /* Set pos to the position before or after IT's current position. */ | |
2504 | if (before_p) | |
2505 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2506 | else | |
260a86a0 KH |
2507 | /* For composition, we must check the character after the |
2508 | composition. */ | |
2509 | pos = (it->what == IT_COMPOSITION | |
2510 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2511 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 2512 | |
06a12811 GM |
2513 | if (it->current.overlay_string_index >= 0) |
2514 | bufpos = IT_CHARPOS (*it); | |
2515 | else | |
2516 | bufpos = 0; | |
2517 | ||
2518 | base_face_id = underlying_face_id (it); | |
2519 | ||
5f5c8ee5 | 2520 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
2521 | face_id = face_at_string_position (it->w, |
2522 | it->string, | |
2523 | CHARPOS (pos), | |
2524 | bufpos, | |
2525 | it->region_beg_charpos, | |
2526 | it->region_end_charpos, | |
2527 | &next_check_charpos, | |
5de7c6f2 | 2528 | base_face_id, 0); |
5f5c8ee5 GM |
2529 | |
2530 | /* Correct the face for charsets different from ASCII. Do it | |
2531 | for the multibyte case only. The face returned above is | |
2532 | suitable for unibyte text if IT->string is unibyte. */ | |
2533 | if (STRING_MULTIBYTE (it->string)) | |
2534 | { | |
50f80c2f | 2535 | const unsigned char *p = SDATA (it->string) + BYTEPOS (pos); |
2051c264 | 2536 | int rest = SBYTES (it->string) - BYTEPOS (pos); |
980806b6 KH |
2537 | int c, len; |
2538 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2311178e | 2539 | |
4fdb80f2 | 2540 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2541 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2542 | } |
2543 | } | |
2544 | else | |
2545 | { | |
70851746 GM |
2546 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2547 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2548 | return it->face_id; | |
2311178e | 2549 | |
5f5c8ee5 GM |
2550 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2551 | pos = it->current.pos; | |
2311178e | 2552 | |
5f5c8ee5 | 2553 | if (before_p) |
c1005d06 | 2554 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2555 | else |
260a86a0 KH |
2556 | { |
2557 | if (it->what == IT_COMPOSITION) | |
2558 | /* For composition, we must check the position after the | |
2559 | composition. */ | |
2560 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2561 | else | |
c1005d06 | 2562 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2563 | } |
2311178e | 2564 | |
5f5c8ee5 GM |
2565 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2566 | face_id = face_at_buffer_position (it->w, | |
2567 | CHARPOS (pos), | |
2568 | it->region_beg_charpos, | |
2569 | it->region_end_charpos, | |
2570 | &next_check_charpos, | |
2571 | limit, 0); | |
2572 | ||
2573 | /* Correct the face for charsets different from ASCII. Do it | |
2574 | for the multibyte case only. The face returned above is | |
2575 | suitable for unibyte text if current_buffer is unibyte. */ | |
2576 | if (it->multibyte_p) | |
2577 | { | |
1d1b6e6a | 2578 | int c = FETCH_MULTIBYTE_CHAR (BYTEPOS (pos)); |
980806b6 KH |
2579 | struct face *face = FACE_FROM_ID (it->f, face_id); |
2580 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2581 | } |
2582 | } | |
2311178e | 2583 | |
5f5c8ee5 GM |
2584 | return face_id; |
2585 | } | |
2586 | ||
2587 | ||
2588 | \f | |
2589 | /*********************************************************************** | |
2590 | Invisible text | |
2591 | ***********************************************************************/ | |
2592 | ||
2593 | /* Set up iterator IT from invisible properties at its current | |
2594 | position. Called from handle_stop. */ | |
2595 | ||
2596 | static enum prop_handled | |
2597 | handle_invisible_prop (it) | |
2598 | struct it *it; | |
2599 | { | |
2600 | enum prop_handled handled = HANDLED_NORMALLY; | |
2601 | ||
2602 | if (STRINGP (it->string)) | |
2603 | { | |
2604 | extern Lisp_Object Qinvisible; | |
2605 | Lisp_Object prop, end_charpos, limit, charpos; | |
2606 | ||
2607 | /* Get the value of the invisible text property at the | |
2608 | current position. Value will be nil if there is no such | |
2609 | property. */ | |
ac90c44f | 2610 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2611 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
2612 | ||
eadc0bf8 GM |
2613 | if (!NILP (prop) |
2614 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2615 | { |
2616 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 2617 | |
5f5c8ee5 GM |
2618 | /* Get the position at which the next change of the |
2619 | invisible text property can be found in IT->string. | |
2620 | Value will be nil if the property value is the same for | |
2621 | all the rest of IT->string. */ | |
2051c264 | 2622 | XSETINT (limit, SCHARS (it->string)); |
5f5c8ee5 | 2623 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, |
2051c264 | 2624 | it->string, limit); |
2311178e | 2625 | |
5f5c8ee5 GM |
2626 | /* Text at current position is invisible. The next |
2627 | change in the property is at position end_charpos. | |
2628 | Move IT's current position to that position. */ | |
2629 | if (INTEGERP (end_charpos) | |
2630 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2631 | { | |
2632 | struct text_pos old; | |
2633 | old = it->current.string_pos; | |
2634 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2635 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2636 | } | |
2637 | else | |
2638 | { | |
2639 | /* The rest of the string is invisible. If this is an | |
2640 | overlay string, proceed with the next overlay string | |
2641 | or whatever comes and return a character from there. */ | |
2642 | if (it->current.overlay_string_index >= 0) | |
2643 | { | |
2644 | next_overlay_string (it); | |
2645 | /* Don't check for overlay strings when we just | |
2646 | finished processing them. */ | |
2647 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2648 | } | |
2649 | else | |
2650 | { | |
2051c264 GM |
2651 | IT_STRING_CHARPOS (*it) = SCHARS (it->string); |
2652 | IT_STRING_BYTEPOS (*it) = SBYTES (it->string); | |
5f5c8ee5 GM |
2653 | } |
2654 | } | |
2655 | } | |
2656 | } | |
2657 | else | |
2658 | { | |
8580a4e3 | 2659 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 2660 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
2661 | |
2662 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 2663 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 2664 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
2665 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
2666 | &overlay); | |
8580a4e3 SM |
2667 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
2668 | ||
5f5c8ee5 | 2669 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 2670 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
2671 | { |
2672 | /* Record whether we have to display an ellipsis for the | |
2673 | invisible text. */ | |
8580a4e3 | 2674 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
2675 | |
2676 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 2677 | |
5f5c8ee5 GM |
2678 | /* Loop skipping over invisible text. The loop is left at |
2679 | ZV or with IT on the first char being visible again. */ | |
2680 | do | |
2681 | { | |
2682 | /* Try to skip some invisible text. Return value is the | |
2683 | position reached which can be equal to IT's position | |
2684 | if there is nothing invisible here. This skips both | |
2685 | over invisible text properties and overlays with | |
2686 | invisible property. */ | |
2687 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2688 | &next_stop, ZV, it->window); | |
2689 | ||
2690 | /* If we skipped nothing at all we weren't at invisible | |
2691 | text in the first place. If everything to the end of | |
2692 | the buffer was skipped, end the loop. */ | |
2693 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 2694 | invis_p = 0; |
5f5c8ee5 GM |
2695 | else |
2696 | { | |
2697 | /* We skipped some characters but not necessarily | |
2698 | all there are. Check if we ended up on visible | |
2699 | text. Fget_char_property returns the property of | |
2700 | the char before the given position, i.e. if we | |
8580a4e3 | 2701 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 2702 | newpos is visible. */ |
ac90c44f | 2703 | pos = make_number (newpos); |
5f5c8ee5 | 2704 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 2705 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 | 2706 | } |
2311178e | 2707 | |
5f5c8ee5 GM |
2708 | /* If we ended up on invisible text, proceed to |
2709 | skip starting with next_stop. */ | |
8580a4e3 | 2710 | if (invis_p) |
5f5c8ee5 GM |
2711 | IT_CHARPOS (*it) = next_stop; |
2712 | } | |
8580a4e3 | 2713 | while (invis_p); |
5a08cbaf | 2714 | |
5f5c8ee5 GM |
2715 | /* The position newpos is now either ZV or on visible text. */ |
2716 | IT_CHARPOS (*it) = newpos; | |
2717 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2311178e | 2718 | |
5a08cbaf GM |
2719 | /* If there are before-strings at the start of invisible |
2720 | text, and the text is invisible because of a text | |
2721 | property, arrange to show before-strings because 20.x did | |
2722 | it that way. (If the text is invisible because of an | |
2723 | overlay property instead of a text property, this is | |
2724 | already handled in the overlay code.) */ | |
2725 | if (NILP (overlay) | |
2726 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 2727 | { |
5a08cbaf GM |
2728 | handled = HANDLED_RECOMPUTE_PROPS; |
2729 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 2730 | } |
5a08cbaf GM |
2731 | else if (display_ellipsis_p) |
2732 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
2733 | } |
2734 | } | |
2735 | ||
2736 | return handled; | |
2737 | } | |
2738 | ||
2739 | ||
5a08cbaf GM |
2740 | /* Make iterator IT return `...' next. */ |
2741 | ||
2742 | static void | |
2743 | setup_for_ellipsis (it) | |
2744 | struct it *it; | |
2745 | { | |
2311178e | 2746 | if (it->dp |
5a08cbaf GM |
2747 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
2748 | { | |
2749 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2750 | it->dpvec = v->contents; | |
2751 | it->dpend = v->contents + v->size; | |
2752 | } | |
2311178e | 2753 | else |
5a08cbaf GM |
2754 | { |
2755 | /* Default `...'. */ | |
2756 | it->dpvec = default_invis_vector; | |
2757 | it->dpend = default_invis_vector + 3; | |
2758 | } | |
2311178e | 2759 | |
5a08cbaf GM |
2760 | /* The ellipsis display does not replace the display of the |
2761 | character at the new position. Indicate this by setting | |
2762 | IT->dpvec_char_len to zero. */ | |
2763 | it->dpvec_char_len = 0; | |
2311178e | 2764 | |
5a08cbaf GM |
2765 | it->current.dpvec_index = 0; |
2766 | it->method = next_element_from_display_vector; | |
2767 | } | |
2768 | ||
2769 | ||
5f5c8ee5 GM |
2770 | \f |
2771 | /*********************************************************************** | |
2772 | 'display' property | |
2773 | ***********************************************************************/ | |
2774 | ||
2775 | /* Set up iterator IT from `display' property at its current position. | |
2776 | Called from handle_stop. */ | |
2777 | ||
2778 | static enum prop_handled | |
2779 | handle_display_prop (it) | |
2780 | struct it *it; | |
2781 | { | |
2782 | Lisp_Object prop, object; | |
2783 | struct text_pos *position; | |
a61b7058 | 2784 | int display_replaced_p = 0; |
5f5c8ee5 GM |
2785 | |
2786 | if (STRINGP (it->string)) | |
2787 | { | |
2788 | object = it->string; | |
2789 | position = &it->current.string_pos; | |
2790 | } | |
2791 | else | |
2792 | { | |
221dd3e7 | 2793 | object = it->w->buffer; |
5f5c8ee5 GM |
2794 | position = &it->current.pos; |
2795 | } | |
2796 | ||
2797 | /* Reset those iterator values set from display property values. */ | |
2798 | it->font_height = Qnil; | |
2799 | it->space_width = Qnil; | |
2800 | it->voffset = 0; | |
2801 | ||
2802 | /* We don't support recursive `display' properties, i.e. string | |
2803 | values that have a string `display' property, that have a string | |
2804 | `display' property etc. */ | |
2805 | if (!it->string_from_display_prop_p) | |
2806 | it->area = TEXT_AREA; | |
2807 | ||
2808 | prop = Fget_char_property (make_number (position->charpos), | |
2809 | Qdisplay, object); | |
2810 | if (NILP (prop)) | |
2811 | return HANDLED_NORMALLY; | |
2812 | ||
f3751a65 | 2813 | if (CONSP (prop) |
12700f40 GM |
2814 | /* Simple properties. */ |
2815 | && !EQ (XCAR (prop), Qimage) | |
2816 | && !EQ (XCAR (prop), Qspace) | |
2817 | && !EQ (XCAR (prop), Qwhen) | |
2818 | && !EQ (XCAR (prop), Qspace_width) | |
2819 | && !EQ (XCAR (prop), Qheight) | |
2820 | && !EQ (XCAR (prop), Qraise) | |
2821 | /* Marginal area specifications. */ | |
2822 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
2823 | && !NILP (XCAR (prop))) | |
5f5c8ee5 | 2824 | { |
a61b7058 | 2825 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 2826 | { |
a61b7058 GM |
2827 | if (handle_single_display_prop (it, XCAR (prop), object, |
2828 | position, display_replaced_p)) | |
2829 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2830 | } |
2831 | } | |
2832 | else if (VECTORP (prop)) | |
2833 | { | |
2834 | int i; | |
a61b7058 GM |
2835 | for (i = 0; i < ASIZE (prop); ++i) |
2836 | if (handle_single_display_prop (it, AREF (prop, i), object, | |
2837 | position, display_replaced_p)) | |
2838 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2839 | } |
2840 | else | |
2841 | { | |
a61b7058 GM |
2842 | if (handle_single_display_prop (it, prop, object, position, 0)) |
2843 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2844 | } |
2845 | ||
a61b7058 | 2846 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
2847 | } |
2848 | ||
2849 | ||
6c577098 | 2850 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2851 | at START_POS in OBJECT. */ |
2852 | ||
2853 | static struct text_pos | |
2854 | display_prop_end (it, object, start_pos) | |
2855 | struct it *it; | |
2856 | Lisp_Object object; | |
2857 | struct text_pos start_pos; | |
2858 | { | |
2859 | Lisp_Object end; | |
2860 | struct text_pos end_pos; | |
5f5c8ee5 | 2861 | |
016b5642 MB |
2862 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
2863 | Qdisplay, object, Qnil); | |
6c577098 GM |
2864 | CHARPOS (end_pos) = XFASTINT (end); |
2865 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2866 | compute_string_pos (&end_pos, start_pos, it->string); |
2867 | else | |
6c577098 | 2868 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2869 | |
2870 | return end_pos; | |
2871 | } | |
2872 | ||
2873 | ||
2874 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2875 | is the object in which the `display' property was found. *POSITION | |
a61b7058 GM |
2876 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
2877 | means that we previously saw a display sub-property which already | |
2878 | replaced text display with something else, for example an image; | |
2879 | ignore such properties after the first one has been processed. | |
5f5c8ee5 GM |
2880 | |
2881 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2882 | end position of the `display' property. | |
2883 | ||
4b41cebb | 2884 | Value is non-zero if something was found which replaces the display |
a61b7058 | 2885 | of buffer or string text. */ |
5f5c8ee5 GM |
2886 | |
2887 | static int | |
a61b7058 GM |
2888 | handle_single_display_prop (it, prop, object, position, |
2889 | display_replaced_before_p) | |
5f5c8ee5 GM |
2890 | struct it *it; |
2891 | Lisp_Object prop; | |
2892 | Lisp_Object object; | |
2893 | struct text_pos *position; | |
a61b7058 | 2894 | int display_replaced_before_p; |
5f5c8ee5 GM |
2895 | { |
2896 | Lisp_Object value; | |
a61b7058 | 2897 | int replaces_text_display_p = 0; |
5f5c8ee5 GM |
2898 | Lisp_Object form; |
2899 | ||
d3acf96b | 2900 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
4b41cebb | 2901 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2902 | form = Qt; |
d3acf96b | 2903 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2904 | { |
2905 | prop = XCDR (prop); | |
2906 | if (!CONSP (prop)) | |
2907 | return 0; | |
2908 | form = XCAR (prop); | |
2909 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2910 | } |
2911 | ||
2912 | if (!NILP (form) && !EQ (form, Qt)) | |
2913 | { | |
331379bf | 2914 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 2915 | struct gcpro gcpro1; |
5f5c8ee5 | 2916 | |
b384d6f8 GM |
2917 | /* Bind `object' to the object having the `display' property, a |
2918 | buffer or string. Bind `position' to the position in the | |
2919 | object where the property was found, and `buffer-position' | |
2920 | to the current position in the buffer. */ | |
2921 | specbind (Qobject, object); | |
31ac723b SM |
2922 | specbind (Qposition, make_number (CHARPOS (*position))); |
2923 | specbind (Qbuffer_position, | |
2924 | make_number (STRINGP (object) | |
2925 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 2926 | GCPRO1 (form); |
116d6f5c | 2927 | form = safe_eval (form); |
b384d6f8 GM |
2928 | UNGCPRO; |
2929 | unbind_to (count, Qnil); | |
5f5c8ee5 | 2930 | } |
2311178e | 2931 | |
5f5c8ee5 GM |
2932 | if (NILP (form)) |
2933 | return 0; | |
2934 | ||
2935 | if (CONSP (prop) | |
2936 | && EQ (XCAR (prop), Qheight) | |
2937 | && CONSP (XCDR (prop))) | |
2938 | { | |
e4093f38 | 2939 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 | 2940 | return 0; |
2311178e | 2941 | |
5f5c8ee5 GM |
2942 | /* `(height HEIGHT)'. */ |
2943 | it->font_height = XCAR (XCDR (prop)); | |
2944 | if (!NILP (it->font_height)) | |
2945 | { | |
2946 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2947 | int new_height = -1; | |
2948 | ||
2949 | if (CONSP (it->font_height) | |
2950 | && (EQ (XCAR (it->font_height), Qplus) | |
2951 | || EQ (XCAR (it->font_height), Qminus)) | |
2952 | && CONSP (XCDR (it->font_height)) | |
2953 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2954 | { | |
2955 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2956 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2957 | if (EQ (XCAR (it->font_height), Qplus)) | |
2958 | steps = - steps; | |
2959 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2960 | } | |
0d8b31c0 | 2961 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
2962 | { |
2963 | /* Call function with current height as argument. | |
2964 | Value is the new height. */ | |
116d6f5c GM |
2965 | Lisp_Object height; |
2966 | height = safe_call1 (it->font_height, | |
2967 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
2968 | if (NUMBERP (height)) |
2969 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
2970 | } |
2971 | else if (NUMBERP (it->font_height)) | |
2972 | { | |
2973 | /* Value is a multiple of the canonical char height. */ | |
2974 | struct face *face; | |
2311178e | 2975 | |
5f5c8ee5 GM |
2976 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); |
2977 | new_height = (XFLOATINT (it->font_height) | |
2978 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2979 | } | |
2980 | else | |
2981 | { | |
2982 | /* Evaluate IT->font_height with `height' bound to the | |
2983 | current specified height to get the new height. */ | |
2984 | Lisp_Object value; | |
331379bf | 2985 | int count = SPECPDL_INDEX (); |
2311178e | 2986 | |
5f5c8ee5 | 2987 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); |
116d6f5c | 2988 | value = safe_eval (it->font_height); |
5f5c8ee5 | 2989 | unbind_to (count, Qnil); |
2311178e | 2990 | |
5f5c8ee5 GM |
2991 | if (NUMBERP (value)) |
2992 | new_height = XFLOATINT (value); | |
2993 | } | |
2311178e | 2994 | |
5f5c8ee5 GM |
2995 | if (new_height > 0) |
2996 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2997 | } | |
2998 | } | |
2999 | else if (CONSP (prop) | |
3000 | && EQ (XCAR (prop), Qspace_width) | |
3001 | && CONSP (XCDR (prop))) | |
3002 | { | |
3003 | /* `(space_width WIDTH)'. */ | |
e4093f38 | 3004 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3005 | return 0; |
2311178e | 3006 | |
5f5c8ee5 GM |
3007 | value = XCAR (XCDR (prop)); |
3008 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
3009 | it->space_width = value; | |
3010 | } | |
3011 | else if (CONSP (prop) | |
3012 | && EQ (XCAR (prop), Qraise) | |
3013 | && CONSP (XCDR (prop))) | |
3014 | { | |
5f5c8ee5 | 3015 | /* `(raise FACTOR)'. */ |
e4093f38 | 3016 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3017 | return 0; |
2311178e | 3018 | |
fb3842a8 | 3019 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
3020 | value = XCAR (XCDR (prop)); |
3021 | if (NUMBERP (value)) | |
3022 | { | |
3023 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
3024 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 3025 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
3026 | } |
3027 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3028 | } | |
3029 | else if (!it->string_from_display_prop_p) | |
3030 | { | |
f3751a65 | 3031 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
4b41cebb | 3032 | VALUE) or `((margin nil) VALUE)' or VALUE. */ |
5f5c8ee5 GM |
3033 | Lisp_Object location, value; |
3034 | struct text_pos start_pos; | |
3035 | int valid_p; | |
3036 | ||
3037 | /* Characters having this form of property are not displayed, so | |
3038 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
3039 | start_pos = *position; |
3040 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 3041 | value = Qnil; |
5f5c8ee5 GM |
3042 | |
3043 | /* Let's stop at the new position and assume that all | |
3044 | text properties change there. */ | |
3045 | it->stop_charpos = position->charpos; | |
3046 | ||
f3751a65 GM |
3047 | location = Qunbound; |
3048 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 3049 | { |
f3751a65 | 3050 | Lisp_Object tem; |
2311178e | 3051 | |
5f5c8ee5 | 3052 | value = XCDR (prop); |
f3751a65 GM |
3053 | if (CONSP (value)) |
3054 | value = XCAR (value); | |
3055 | ||
3056 | tem = XCAR (prop); | |
3057 | if (EQ (XCAR (tem), Qmargin) | |
3058 | && (tem = XCDR (tem), | |
3059 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
3060 | (NILP (tem) | |
3061 | || EQ (tem, Qleft_margin) | |
3062 | || EQ (tem, Qright_margin)))) | |
3063 | location = tem; | |
5f5c8ee5 | 3064 | } |
f3751a65 GM |
3065 | |
3066 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
3067 | { |
3068 | location = Qnil; | |
3069 | value = prop; | |
3070 | } | |
3071 | ||
3072 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 3073 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
3074 | valid_p = STRINGP (value); |
3075 | else | |
3076 | valid_p = (STRINGP (value) | |
3077 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3078 | || valid_image_p (value)); | |
3079 | #else /* not HAVE_WINDOW_SYSTEM */ | |
3080 | valid_p = STRINGP (value); | |
3081 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2311178e | 3082 | |
5f5c8ee5 GM |
3083 | if ((EQ (location, Qleft_margin) |
3084 | || EQ (location, Qright_margin) | |
3085 | || NILP (location)) | |
a61b7058 GM |
3086 | && valid_p |
3087 | && !display_replaced_before_p) | |
5f5c8ee5 | 3088 | { |
a61b7058 | 3089 | replaces_text_display_p = 1; |
2311178e | 3090 | |
5f5c8ee5 GM |
3091 | /* Save current settings of IT so that we can restore them |
3092 | when we are finished with the glyph property value. */ | |
3093 | push_it (it); | |
2311178e | 3094 | |
5f5c8ee5 GM |
3095 | if (NILP (location)) |
3096 | it->area = TEXT_AREA; | |
3097 | else if (EQ (location, Qleft_margin)) | |
3098 | it->area = LEFT_MARGIN_AREA; | |
3099 | else | |
3100 | it->area = RIGHT_MARGIN_AREA; | |
2311178e | 3101 | |
5f5c8ee5 GM |
3102 | if (STRINGP (value)) |
3103 | { | |
3104 | it->string = value; | |
3105 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3106 | it->current.overlay_string_index = -1; | |
3107 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2051c264 | 3108 | it->end_charpos = it->string_nchars = SCHARS (it->string); |
5f5c8ee5 GM |
3109 | it->method = next_element_from_string; |
3110 | it->stop_charpos = 0; | |
3111 | it->string_from_display_prop_p = 1; | |
e187cf71 GM |
3112 | /* Say that we haven't consumed the characters with |
3113 | `display' property yet. The call to pop_it in | |
3114 | set_iterator_to_next will clean this up. */ | |
3115 | *position = start_pos; | |
5f5c8ee5 GM |
3116 | } |
3117 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3118 | { | |
3119 | it->method = next_element_from_stretch; | |
3120 | it->object = value; | |
3121 | it->current.pos = it->position = start_pos; | |
3122 | } | |
3123 | #ifdef HAVE_WINDOW_SYSTEM | |
3124 | else | |
3125 | { | |
3126 | it->what = IT_IMAGE; | |
3127 | it->image_id = lookup_image (it->f, value); | |
3128 | it->position = start_pos; | |
3129 | it->object = NILP (object) ? it->w->buffer : object; | |
3130 | it->method = next_element_from_image; | |
2311178e | 3131 | |
02513cdd | 3132 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
3133 | `display' property yet. The call to pop_it in |
3134 | set_iterator_to_next will clean this up. */ | |
3135 | *position = start_pos; | |
3136 | } | |
3137 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3138 | } | |
a21a3943 GM |
3139 | else |
3140 | /* Invalid property or property not supported. Restore | |
3141 | the position to what it was before. */ | |
3142 | *position = start_pos; | |
5f5c8ee5 GM |
3143 | } |
3144 | ||
a61b7058 | 3145 | return replaces_text_display_p; |
5f5c8ee5 GM |
3146 | } |
3147 | ||
3148 | ||
06568bbf GM |
3149 | /* Check if PROP is a display sub-property value whose text should be |
3150 | treated as intangible. */ | |
3151 | ||
3152 | static int | |
3153 | single_display_prop_intangible_p (prop) | |
3154 | Lisp_Object prop; | |
3155 | { | |
3156 | /* Skip over `when FORM'. */ | |
3157 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3158 | { | |
3159 | prop = XCDR (prop); | |
3160 | if (!CONSP (prop)) | |
3161 | return 0; | |
3162 | prop = XCDR (prop); | |
3163 | } | |
3164 | ||
959bc044 SM |
3165 | if (STRINGP (prop)) |
3166 | return 1; | |
3167 | ||
06568bbf GM |
3168 | if (!CONSP (prop)) |
3169 | return 0; | |
3170 | ||
3171 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
3172 | we don't need to treat text as intangible. */ | |
3173 | if (EQ (XCAR (prop), Qmargin)) | |
3174 | { | |
3175 | prop = XCDR (prop); | |
3176 | if (!CONSP (prop)) | |
3177 | return 0; | |
3178 | ||
3179 | prop = XCDR (prop); | |
3180 | if (!CONSP (prop) | |
3181 | || EQ (XCAR (prop), Qleft_margin) | |
3182 | || EQ (XCAR (prop), Qright_margin)) | |
3183 | return 0; | |
3184 | } | |
2311178e | 3185 | |
06568bbf GM |
3186 | return CONSP (prop) && EQ (XCAR (prop), Qimage); |
3187 | } | |
3188 | ||
3189 | ||
3190 | /* Check if PROP is a display property value whose text should be | |
3191 | treated as intangible. */ | |
3192 | ||
3193 | int | |
3194 | display_prop_intangible_p (prop) | |
3195 | Lisp_Object prop; | |
3196 | { | |
3197 | if (CONSP (prop) | |
3198 | && CONSP (XCAR (prop)) | |
3199 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3200 | { | |
3201 | /* A list of sub-properties. */ | |
3202 | while (CONSP (prop)) | |
3203 | { | |
3204 | if (single_display_prop_intangible_p (XCAR (prop))) | |
3205 | return 1; | |
3206 | prop = XCDR (prop); | |
3207 | } | |
3208 | } | |
3209 | else if (VECTORP (prop)) | |
3210 | { | |
3211 | /* A vector of sub-properties. */ | |
3212 | int i; | |
a61b7058 GM |
3213 | for (i = 0; i < ASIZE (prop); ++i) |
3214 | if (single_display_prop_intangible_p (AREF (prop, i))) | |
06568bbf GM |
3215 | return 1; |
3216 | } | |
3217 | else | |
3218 | return single_display_prop_intangible_p (prop); | |
3219 | ||
3220 | return 0; | |
3221 | } | |
3222 | ||
74bd6d65 GM |
3223 | |
3224 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
3225 | ||
3226 | static int | |
3227 | single_display_prop_string_p (prop, string) | |
3228 | Lisp_Object prop, string; | |
3229 | { | |
74bd6d65 GM |
3230 | if (EQ (string, prop)) |
3231 | return 1; | |
2311178e | 3232 | |
74bd6d65 GM |
3233 | /* Skip over `when FORM'. */ |
3234 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3235 | { | |
3236 | prop = XCDR (prop); | |
3237 | if (!CONSP (prop)) | |
3238 | return 0; | |
3239 | prop = XCDR (prop); | |
3240 | } | |
3241 | ||
3242 | if (CONSP (prop)) | |
3243 | /* Skip over `margin LOCATION'. */ | |
3244 | if (EQ (XCAR (prop), Qmargin)) | |
3245 | { | |
3246 | prop = XCDR (prop); | |
3247 | if (!CONSP (prop)) | |
3248 | return 0; | |
3249 | ||
3250 | prop = XCDR (prop); | |
3251 | if (!CONSP (prop)) | |
3252 | return 0; | |
3253 | } | |
2311178e | 3254 | |
74bd6d65 GM |
3255 | return CONSP (prop) && EQ (XCAR (prop), string); |
3256 | } | |
3257 | ||
3258 | ||
3259 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
3260 | ||
3261 | static int | |
3262 | display_prop_string_p (prop, string) | |
3263 | Lisp_Object prop, string; | |
3264 | { | |
74bd6d65 GM |
3265 | if (CONSP (prop) |
3266 | && CONSP (XCAR (prop)) | |
3267 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3268 | { | |
3269 | /* A list of sub-properties. */ | |
3270 | while (CONSP (prop)) | |
3271 | { | |
3272 | if (single_display_prop_string_p (XCAR (prop), string)) | |
3273 | return 1; | |
3274 | prop = XCDR (prop); | |
3275 | } | |
3276 | } | |
3277 | else if (VECTORP (prop)) | |
3278 | { | |
3279 | /* A vector of sub-properties. */ | |
3280 | int i; | |
3281 | for (i = 0; i < ASIZE (prop); ++i) | |
3282 | if (single_display_prop_string_p (AREF (prop, i), string)) | |
3283 | return 1; | |
3284 | } | |
3285 | else | |
3286 | return single_display_prop_string_p (prop, string); | |
3287 | ||
3288 | return 0; | |
3289 | } | |
3290 | ||
3291 | ||
3292 | /* Determine from which buffer position in W's buffer STRING comes | |
3293 | from. AROUND_CHARPOS is an approximate position where it could | |
3294 | be from. Value is the buffer position or 0 if it couldn't be | |
3295 | determined. | |
3296 | ||
3297 | W's buffer must be current. | |
3298 | ||
3299 | This function is necessary because we don't record buffer positions | |
3300 | in glyphs generated from strings (to keep struct glyph small). | |
3301 | This function may only use code that doesn't eval because it is | |
3302 | called asynchronously from note_mouse_highlight. */ | |
3303 | ||
3304 | int | |
3305 | string_buffer_position (w, string, around_charpos) | |
3306 | struct window *w; | |
3307 | Lisp_Object string; | |
3308 | int around_charpos; | |
3309 | { | |
74bd6d65 GM |
3310 | Lisp_Object limit, prop, pos; |
3311 | const int MAX_DISTANCE = 1000; | |
3312 | int found = 0; | |
3313 | ||
d8731202 | 3314 | pos = make_number (around_charpos); |
74bd6d65 GM |
3315 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
3316 | while (!found && !EQ (pos, limit)) | |
3317 | { | |
3318 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3319 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3320 | found = 1; | |
3321 | else | |
134d9283 | 3322 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
3323 | } |
3324 | ||
3325 | if (!found) | |
3326 | { | |
d8731202 | 3327 | pos = make_number (around_charpos); |
74bd6d65 GM |
3328 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
3329 | while (!found && !EQ (pos, limit)) | |
3330 | { | |
3331 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3332 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3333 | found = 1; | |
3334 | else | |
134d9283 GM |
3335 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
3336 | limit); | |
74bd6d65 GM |
3337 | } |
3338 | } | |
3339 | ||
3340 | return found ? XINT (pos) : 0; | |
3341 | } | |
3342 | ||
3343 | ||
5f5c8ee5 | 3344 | \f |
260a86a0 KH |
3345 | /*********************************************************************** |
3346 | `composition' property | |
3347 | ***********************************************************************/ | |
3348 | ||
3349 | /* Set up iterator IT from `composition' property at its current | |
3350 | position. Called from handle_stop. */ | |
3351 | ||
3352 | static enum prop_handled | |
3353 | handle_composition_prop (it) | |
3354 | struct it *it; | |
3355 | { | |
3356 | Lisp_Object prop, string; | |
3357 | int pos, pos_byte, end; | |
3358 | enum prop_handled handled = HANDLED_NORMALLY; | |
3359 | ||
3360 | if (STRINGP (it->string)) | |
3361 | { | |
3362 | pos = IT_STRING_CHARPOS (*it); | |
3363 | pos_byte = IT_STRING_BYTEPOS (*it); | |
3364 | string = it->string; | |
3365 | } | |
3366 | else | |
3367 | { | |
3368 | pos = IT_CHARPOS (*it); | |
3369 | pos_byte = IT_BYTEPOS (*it); | |
3370 | string = Qnil; | |
3371 | } | |
3372 | ||
3373 | /* If there's a valid composition and point is not inside of the | |
3374 | composition (in the case that the composition is from the current | |
3375 | buffer), draw a glyph composed from the composition components. */ | |
3376 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
3377 | && COMPOSITION_VALID_P (pos, end, prop) | |
3378 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
3379 | { | |
3380 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
3381 | ||
3382 | if (id >= 0) | |
3383 | { | |
3384 | it->method = next_element_from_composition; | |
3385 | it->cmp_id = id; | |
3386 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
3387 | /* For a terminal, draw only the first character of the | |
3388 | components. */ | |
3389 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
3390 | it->len = (STRINGP (it->string) | |
3391 | ? string_char_to_byte (it->string, end) | |
3392 | : CHAR_TO_BYTE (end)) - pos_byte; | |
3393 | it->stop_charpos = end; | |
3394 | handled = HANDLED_RETURN; | |
3395 | } | |
3396 | } | |
3397 | ||
3398 | return handled; | |
3399 | } | |
3400 | ||
3401 | ||
3402 | \f | |
5f5c8ee5 GM |
3403 | /*********************************************************************** |
3404 | Overlay strings | |
3405 | ***********************************************************************/ | |
3406 | ||
3407 | /* The following structure is used to record overlay strings for | |
3408 | later sorting in load_overlay_strings. */ | |
3409 | ||
3410 | struct overlay_entry | |
3411 | { | |
2970b9be | 3412 | Lisp_Object overlay; |
5f5c8ee5 GM |
3413 | Lisp_Object string; |
3414 | int priority; | |
3415 | int after_string_p; | |
3416 | }; | |
3417 | ||
3418 | ||
3419 | /* Set up iterator IT from overlay strings at its current position. | |
3420 | Called from handle_stop. */ | |
3421 | ||
3422 | static enum prop_handled | |
3423 | handle_overlay_change (it) | |
3424 | struct it *it; | |
3425 | { | |
5a08cbaf | 3426 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 3427 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 3428 | else |
2970b9be | 3429 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
3430 | } |
3431 | ||
3432 | ||
3433 | /* Set up the next overlay string for delivery by IT, if there is an | |
3434 | overlay string to deliver. Called by set_iterator_to_next when the | |
3435 | end of the current overlay string is reached. If there are more | |
3436 | overlay strings to display, IT->string and | |
3437 | IT->current.overlay_string_index are set appropriately here. | |
3438 | Otherwise IT->string is set to nil. */ | |
2311178e | 3439 | |
5f5c8ee5 GM |
3440 | static void |
3441 | next_overlay_string (it) | |
3442 | struct it *it; | |
3443 | { | |
3444 | ++it->current.overlay_string_index; | |
3445 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
3446 | { | |
3447 | /* No more overlay strings. Restore IT's settings to what | |
3448 | they were before overlay strings were processed, and | |
3449 | continue to deliver from current_buffer. */ | |
5a08cbaf | 3450 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
2311178e | 3451 | |
5f5c8ee5 GM |
3452 | pop_it (it); |
3453 | xassert (it->stop_charpos >= BEGV | |
3454 | && it->stop_charpos <= it->end_charpos); | |
3455 | it->string = Qnil; | |
3456 | it->current.overlay_string_index = -1; | |
3457 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
3458 | it->n_overlay_strings = 0; | |
3459 | it->method = next_element_from_buffer; | |
2970b9be GM |
3460 | |
3461 | /* If we're at the end of the buffer, record that we have | |
3462 | processed the overlay strings there already, so that | |
3463 | next_element_from_buffer doesn't try it again. */ | |
3464 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3465 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
3466 | |
3467 | /* If we have to display `...' for invisible text, set | |
3468 | the iterator up for that. */ | |
3469 | if (display_ellipsis_p) | |
3470 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3471 | } |
3472 | else | |
3473 | { | |
3474 | /* There are more overlay strings to process. If | |
3475 | IT->current.overlay_string_index has advanced to a position | |
3476 | where we must load IT->overlay_strings with more strings, do | |
3477 | it. */ | |
3478 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2311178e | 3479 | |
5f5c8ee5 | 3480 | if (it->current.overlay_string_index && i == 0) |
5a08cbaf | 3481 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
3482 | |
3483 | /* Initialize IT to deliver display elements from the overlay | |
3484 | string. */ | |
3485 | it->string = it->overlay_strings[i]; | |
3486 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3487 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
3488 | it->method = next_element_from_string; | |
3489 | it->stop_charpos = 0; | |
3490 | } | |
2311178e | 3491 | |
5f5c8ee5 GM |
3492 | CHECK_IT (it); |
3493 | } | |
3494 | ||
3495 | ||
3496 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
3497 | comparison function for qsort in load_overlay_strings. Overlay | |
3498 | strings for the same position are sorted so that | |
3499 | ||
2970b9be GM |
3500 | 1. All after-strings come in front of before-strings, except |
3501 | when they come from the same overlay. | |
2311178e | 3502 | |
5f5c8ee5 GM |
3503 | 2. Within after-strings, strings are sorted so that overlay strings |
3504 | from overlays with higher priorities come first. | |
3505 | ||
3506 | 2. Within before-strings, strings are sorted so that overlay | |
3507 | strings from overlays with higher priorities come last. | |
3508 | ||
3509 | Value is analogous to strcmp. */ | |
3510 | ||
2311178e | 3511 | |
5f5c8ee5 GM |
3512 | static int |
3513 | compare_overlay_entries (e1, e2) | |
3514 | void *e1, *e2; | |
3515 | { | |
3516 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
3517 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
3518 | int result; | |
3519 | ||
3520 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
3521 | { |
3522 | /* Let after-strings appear in front of before-strings if | |
3523 | they come from different overlays. */ | |
3524 | if (EQ (entry1->overlay, entry2->overlay)) | |
3525 | result = entry1->after_string_p ? 1 : -1; | |
3526 | else | |
3527 | result = entry1->after_string_p ? -1 : 1; | |
3528 | } | |
5f5c8ee5 GM |
3529 | else if (entry1->after_string_p) |
3530 | /* After-strings sorted in order of decreasing priority. */ | |
3531 | result = entry2->priority - entry1->priority; | |
3532 | else | |
3533 | /* Before-strings sorted in order of increasing priority. */ | |
3534 | result = entry1->priority - entry2->priority; | |
3535 | ||
3536 | return result; | |
3537 | } | |
3538 | ||
3539 | ||
3540 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
3541 | current buffer position, or from CHARPOS if that is > 0. Set |
3542 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
3543 | |
3544 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
3545 | a time. On entry into load_overlay_strings, | |
3546 | IT->current.overlay_string_index gives the number of overlay | |
3547 | strings that have already been loaded by previous calls to this | |
3548 | function. | |
3549 | ||
2970b9be GM |
3550 | IT->add_overlay_start contains an additional overlay start |
3551 | position to consider for taking overlay strings from, if non-zero. | |
3552 | This position comes into play when the overlay has an `invisible' | |
3553 | property, and both before and after-strings. When we've skipped to | |
3554 | the end of the overlay, because of its `invisible' property, we | |
3555 | nevertheless want its before-string to appear. | |
3556 | IT->add_overlay_start will contain the overlay start position | |
3557 | in this case. | |
3558 | ||
5f5c8ee5 GM |
3559 | Overlay strings are sorted so that after-string strings come in |
3560 | front of before-string strings. Within before and after-strings, | |
3561 | strings are sorted by overlay priority. See also function | |
3562 | compare_overlay_entries. */ | |
2311178e | 3563 | |
5f5c8ee5 | 3564 | static void |
5a08cbaf | 3565 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 3566 | struct it *it; |
5a08cbaf | 3567 | int charpos; |
5f5c8ee5 GM |
3568 | { |
3569 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
cafafe0b | 3570 | Lisp_Object ov, overlay, window, str, invisible; |
5f5c8ee5 GM |
3571 | int start, end; |
3572 | int size = 20; | |
cafafe0b | 3573 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
3574 | struct overlay_entry *entries |
3575 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
3576 | |
3577 | if (charpos <= 0) | |
3578 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
3579 | |
3580 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
3581 | `entries' which has size `size' and currently contains `n' | |
3582 | elements. AFTER_P non-zero means STRING is an after-string of | |
3583 | OVERLAY. */ | |
3584 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
3585 | do \ | |
3586 | { \ | |
3587 | Lisp_Object priority; \ | |
3588 | \ | |
3589 | if (n == size) \ | |
3590 | { \ | |
3591 | int new_size = 2 * size; \ | |
3592 | struct overlay_entry *old = entries; \ | |
3593 | entries = \ | |
3594 | (struct overlay_entry *) alloca (new_size \ | |
3595 | * sizeof *entries); \ | |
3596 | bcopy (old, entries, size * sizeof *entries); \ | |
3597 | size = new_size; \ | |
3598 | } \ | |
3599 | \ | |
3600 | entries[n].string = (STRING); \ | |
2970b9be | 3601 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 3602 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 3603 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
3604 | entries[n].after_string_p = (AFTER_P); \ |
3605 | ++n; \ | |
3606 | } \ | |
3607 | while (0) | |
3608 | ||
3609 | /* Process overlay before the overlay center. */ | |
2970b9be | 3610 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3611 | { |
9472f927 | 3612 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3613 | xassert (OVERLAYP (overlay)); |
3614 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3615 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2311178e | 3616 | |
cafafe0b | 3617 | if (end < charpos) |
5f5c8ee5 GM |
3618 | break; |
3619 | ||
3620 | /* Skip this overlay if it doesn't start or end at IT's current | |
3621 | position. */ | |
cafafe0b | 3622 | if (end != charpos && start != charpos) |
5f5c8ee5 | 3623 | continue; |
2311178e | 3624 | |
5f5c8ee5 GM |
3625 | /* Skip this overlay if it doesn't apply to IT->w. */ |
3626 | window = Foverlay_get (overlay, Qwindow); | |
3627 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3628 | continue; | |
3629 | ||
cafafe0b GM |
3630 | /* If the text ``under'' the overlay is invisible, both before- |
3631 | and after-strings from this overlay are visible; start and | |
3632 | end position are indistinguishable. */ | |
3633 | invisible = Foverlay_get (overlay, Qinvisible); | |
3634 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3635 | ||
5f5c8ee5 | 3636 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3637 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 3638 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 3639 | && SCHARS (str)) |
5f5c8ee5 | 3640 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 3641 | |
5f5c8ee5 | 3642 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 3643 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 3644 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 3645 | && SCHARS (str)) |
5f5c8ee5 GM |
3646 | RECORD_OVERLAY_STRING (overlay, str, 1); |
3647 | } | |
2311178e | 3648 | |
5f5c8ee5 | 3649 | /* Process overlays after the overlay center. */ |
2970b9be | 3650 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3651 | { |
9472f927 | 3652 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3653 | xassert (OVERLAYP (overlay)); |
3654 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3655 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3656 | ||
cafafe0b | 3657 | if (start > charpos) |
5f5c8ee5 | 3658 | break; |
2311178e | 3659 | |
5f5c8ee5 GM |
3660 | /* Skip this overlay if it doesn't start or end at IT's current |
3661 | position. */ | |
cafafe0b | 3662 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3663 | continue; |
3664 | ||
3665 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3666 | window = Foverlay_get (overlay, Qwindow); | |
3667 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3668 | continue; | |
2311178e | 3669 | |
cafafe0b GM |
3670 | /* If the text ``under'' the overlay is invisible, it has a zero |
3671 | dimension, and both before- and after-strings apply. */ | |
3672 | invisible = Foverlay_get (overlay, Qinvisible); | |
3673 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3674 | ||
5f5c8ee5 | 3675 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3676 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 3677 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 3678 | && SCHARS (str)) |
5f5c8ee5 | 3679 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 3680 | |
5f5c8ee5 | 3681 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 3682 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 3683 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 3684 | && SCHARS (str)) |
5f5c8ee5 GM |
3685 | RECORD_OVERLAY_STRING (overlay, str, 1); |
3686 | } | |
3687 | ||
3688 | #undef RECORD_OVERLAY_STRING | |
2311178e | 3689 | |
5f5c8ee5 | 3690 | /* Sort entries. */ |
cafafe0b | 3691 | if (n > 1) |
2970b9be | 3692 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
3693 | |
3694 | /* Record the total number of strings to process. */ | |
3695 | it->n_overlay_strings = n; | |
3696 | ||
3697 | /* IT->current.overlay_string_index is the number of overlay strings | |
3698 | that have already been consumed by IT. Copy some of the | |
3699 | remaining overlay strings to IT->overlay_strings. */ | |
3700 | i = 0; | |
3701 | j = it->current.overlay_string_index; | |
3702 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
3703 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 3704 | |
5f5c8ee5 GM |
3705 | CHECK_IT (it); |
3706 | } | |
3707 | ||
3708 | ||
3709 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
3710 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
3711 | least one overlay string was found. */ | |
5f5c8ee5 GM |
3712 | |
3713 | static int | |
5a08cbaf | 3714 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 3715 | struct it *it; |
5a08cbaf | 3716 | int charpos; |
5f5c8ee5 GM |
3717 | { |
3718 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
3719 | process. This fills IT->overlay_strings with strings, and sets | |
3720 | IT->n_overlay_strings to the total number of strings to process. | |
3721 | IT->pos.overlay_string_index has to be set temporarily to zero | |
3722 | because load_overlay_strings needs this; it must be set to -1 | |
3723 | when no overlay strings are found because a zero value would | |
3724 | indicate a position in the first overlay string. */ | |
3725 | it->current.overlay_string_index = 0; | |
5a08cbaf | 3726 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
3727 | |
3728 | /* If we found overlay strings, set up IT to deliver display | |
3729 | elements from the first one. Otherwise set up IT to deliver | |
3730 | from current_buffer. */ | |
3731 | if (it->n_overlay_strings) | |
3732 | { | |
3733 | /* Make sure we know settings in current_buffer, so that we can | |
3734 | restore meaningful values when we're done with the overlay | |
3735 | strings. */ | |
3736 | compute_stop_pos (it); | |
3737 | xassert (it->face_id >= 0); | |
2311178e | 3738 | |
5f5c8ee5 GM |
3739 | /* Save IT's settings. They are restored after all overlay |
3740 | strings have been processed. */ | |
3741 | xassert (it->sp == 0); | |
3742 | push_it (it); | |
3743 | ||
3744 | /* Set up IT to deliver display elements from the first overlay | |
3745 | string. */ | |
3746 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 3747 | it->string = it->overlay_strings[0]; |
b2046df8 | 3748 | it->stop_charpos = 0; |
5f5c8ee5 | 3749 | xassert (STRINGP (it->string)); |
2051c264 | 3750 | it->end_charpos = SCHARS (it->string); |
d5db4077 | 3751 | it->multibyte_p = STRING_MULTIBYTE (it->string); |
5f5c8ee5 GM |
3752 | it->method = next_element_from_string; |
3753 | } | |
3754 | else | |
3755 | { | |
3756 | it->string = Qnil; | |
3757 | it->current.overlay_string_index = -1; | |
3758 | it->method = next_element_from_buffer; | |
3759 | } | |
3760 | ||
3761 | CHECK_IT (it); | |
3762 | ||
3763 | /* Value is non-zero if we found at least one overlay string. */ | |
3764 | return STRINGP (it->string); | |
3765 | } | |
3766 | ||
3767 | ||
3768 | \f | |
3769 | /*********************************************************************** | |
3770 | Saving and restoring state | |
3771 | ***********************************************************************/ | |
3772 | ||
3773 | /* Save current settings of IT on IT->stack. Called, for example, | |
3774 | before setting up IT for an overlay string, to be able to restore | |
3775 | IT's settings to what they were after the overlay string has been | |
3776 | processed. */ | |
3777 | ||
3778 | static void | |
3779 | push_it (it) | |
3780 | struct it *it; | |
3781 | { | |
3782 | struct iterator_stack_entry *p; | |
2311178e | 3783 | |
5f5c8ee5 GM |
3784 | xassert (it->sp < 2); |
3785 | p = it->stack + it->sp; | |
3786 | ||
3787 | p->stop_charpos = it->stop_charpos; | |
3788 | xassert (it->face_id >= 0); | |
3789 | p->face_id = it->face_id; | |
3790 | p->string = it->string; | |
3791 | p->pos = it->current; | |
3792 | p->end_charpos = it->end_charpos; | |
3793 | p->string_nchars = it->string_nchars; | |
3794 | p->area = it->area; | |
3795 | p->multibyte_p = it->multibyte_p; | |
3796 | p->space_width = it->space_width; | |
3797 | p->font_height = it->font_height; | |
3798 | p->voffset = it->voffset; | |
3799 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 3800 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
3801 | ++it->sp; |
3802 | } | |
3803 | ||
3804 | ||
3805 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
3806 | more overlay strings must be processed, and we return to delivering | |
3807 | display elements from a buffer, or when the end of a string from a | |
3808 | `display' property is reached and we return to delivering display | |
3809 | elements from an overlay string, or from a buffer. */ | |
3810 | ||
3811 | static void | |
3812 | pop_it (it) | |
3813 | struct it *it; | |
3814 | { | |
3815 | struct iterator_stack_entry *p; | |
2311178e | 3816 | |
5f5c8ee5 GM |
3817 | xassert (it->sp > 0); |
3818 | --it->sp; | |
3819 | p = it->stack + it->sp; | |
3820 | it->stop_charpos = p->stop_charpos; | |
3821 | it->face_id = p->face_id; | |
3822 | it->string = p->string; | |
3823 | it->current = p->pos; | |
3824 | it->end_charpos = p->end_charpos; | |
3825 | it->string_nchars = p->string_nchars; | |
3826 | it->area = p->area; | |
3827 | it->multibyte_p = p->multibyte_p; | |
3828 | it->space_width = p->space_width; | |
3829 | it->font_height = p->font_height; | |
3830 | it->voffset = p->voffset; | |
3831 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3832 | } | |
3833 | ||
3834 | ||
3835 | \f | |
3836 | /*********************************************************************** | |
3837 | Moving over lines | |
3838 | ***********************************************************************/ | |
3839 | ||
3840 | /* Set IT's current position to the previous line start. */ | |
3841 | ||
3842 | static void | |
3843 | back_to_previous_line_start (it) | |
3844 | struct it *it; | |
3845 | { | |
3846 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3847 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3848 | } | |
3849 | ||
3850 | ||
cafafe0b | 3851 | /* Move IT to the next line start. |
2311178e | 3852 | |
cafafe0b GM |
3853 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if |
3854 | we skipped over part of the text (as opposed to moving the iterator | |
3855 | continuously over the text). Otherwise, don't change the value | |
3856 | of *SKIPPED_P. | |
2311178e | 3857 | |
cafafe0b GM |
3858 | Newlines may come from buffer text, overlay strings, or strings |
3859 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
3860 | simply use find_next_newline_no_quit. |
3861 | ||
3862 | Note that this function may not skip over invisible text that is so | |
3863 | because of text properties and immediately follows a newline. If | |
3864 | it would, function reseat_at_next_visible_line_start, when called | |
3865 | from set_iterator_to_next, would effectively make invisible | |
3866 | characters following a newline part of the wrong glyph row, which | |
3867 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 3868 | |
cafafe0b GM |
3869 | static int |
3870 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 3871 | struct it *it; |
cafafe0b | 3872 | int *skipped_p; |
5f5c8ee5 | 3873 | { |
54918e2b | 3874 | int old_selective, newline_found_p, n; |
cafafe0b GM |
3875 | const int MAX_NEWLINE_DISTANCE = 500; |
3876 | ||
0fd37545 GM |
3877 | /* If already on a newline, just consume it to avoid unintended |
3878 | skipping over invisible text below. */ | |
51695746 GM |
3879 | if (it->what == IT_CHARACTER |
3880 | && it->c == '\n' | |
3881 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
3882 | { |
3883 | set_iterator_to_next (it, 0); | |
a77dc1ec | 3884 | it->c = 0; |
0fd37545 GM |
3885 | return 1; |
3886 | } | |
3887 | ||
54918e2b | 3888 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
3889 | unnecessary because it's done by the caller, and (b) leads to an |
3890 | infinite recursion because next_element_from_ellipsis indirectly | |
3891 | calls this function. */ | |
54918e2b GM |
3892 | old_selective = it->selective; |
3893 | it->selective = 0; | |
3894 | ||
cafafe0b GM |
3895 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
3896 | from buffer text. */ | |
3aec8722 GM |
3897 | for (n = newline_found_p = 0; |
3898 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
3899 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 3900 | { |
8692ca92 | 3901 | if (!get_next_display_element (it)) |
d43be70c | 3902 | return 0; |
d02f1cb8 | 3903 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 3904 | set_iterator_to_next (it, 0); |
cafafe0b GM |
3905 | } |
3906 | ||
3907 | /* If we didn't find a newline near enough, see if we can use a | |
3908 | short-cut. */ | |
db0bb807 | 3909 | if (!newline_found_p) |
cafafe0b GM |
3910 | { |
3911 | int start = IT_CHARPOS (*it); | |
3912 | int limit = find_next_newline_no_quit (start, 1); | |
3913 | Lisp_Object pos; | |
3914 | ||
3915 | xassert (!STRINGP (it->string)); | |
3916 | ||
3917 | /* If there isn't any `display' property in sight, and no | |
3918 | overlays, we can just use the position of the newline in | |
3919 | buffer text. */ | |
3920 | if (it->stop_charpos >= limit | |
3921 | || ((pos = Fnext_single_property_change (make_number (start), | |
3922 | Qdisplay, | |
3923 | Qnil, make_number (limit)), | |
3924 | NILP (pos)) | |
3925 | && next_overlay_change (start) == ZV)) | |
3926 | { | |
3927 | IT_CHARPOS (*it) = limit; | |
3928 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
3929 | *skipped_p = newline_found_p = 1; | |
3930 | } | |
3931 | else | |
3932 | { | |
3933 | while (get_next_display_element (it) | |
3934 | && !newline_found_p) | |
3935 | { | |
3936 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
3937 | set_iterator_to_next (it, 0); | |
3938 | } | |
3939 | } | |
3940 | } | |
3941 | ||
54918e2b | 3942 | it->selective = old_selective; |
cafafe0b | 3943 | return newline_found_p; |
5f5c8ee5 GM |
3944 | } |
3945 | ||
3946 | ||
3947 | /* Set IT's current position to the previous visible line start. Skip | |
3948 | invisible text that is so either due to text properties or due to | |
3949 | selective display. Caution: this does not change IT->current_x and | |
3950 | IT->hpos. */ | |
3951 | ||
3952 | static void | |
3953 | back_to_previous_visible_line_start (it) | |
3954 | struct it *it; | |
3955 | { | |
3956 | int visible_p = 0; | |
3957 | ||
3958 | /* Go back one newline if not on BEGV already. */ | |
3959 | if (IT_CHARPOS (*it) > BEGV) | |
3960 | back_to_previous_line_start (it); | |
3961 | ||
3962 | /* Move over lines that are invisible because of selective display | |
3963 | or text properties. */ | |
3964 | while (IT_CHARPOS (*it) > BEGV | |
3965 | && !visible_p) | |
3966 | { | |
3967 | visible_p = 1; | |
3968 | ||
3969 | /* If selective > 0, then lines indented more than that values | |
3970 | are invisible. */ | |
3971 | if (it->selective > 0 | |
3972 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
a67e162b | 3973 | (double) it->selective)) /* iftc */ |
5f5c8ee5 | 3974 | visible_p = 0; |
2311178e | 3975 | else |
5f5c8ee5 GM |
3976 | { |
3977 | Lisp_Object prop; | |
3978 | ||
6fc556fd KR |
3979 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
3980 | Qinvisible, it->window); | |
5f5c8ee5 GM |
3981 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
3982 | visible_p = 0; | |
3983 | } | |
5f5c8ee5 GM |
3984 | |
3985 | /* Back one more newline if the current one is invisible. */ | |
3986 | if (!visible_p) | |
3987 | back_to_previous_line_start (it); | |
3988 | } | |
3989 | ||
3990 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3991 | xassert (IT_CHARPOS (*it) == BEGV | |
3992 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3993 | CHECK_IT (it); | |
3994 | } | |
3995 | ||
3996 | ||
3997 | /* Reseat iterator IT at the previous visible line start. Skip | |
3998 | invisible text that is so either due to text properties or due to | |
3999 | selective display. At the end, update IT's overlay information, | |
4000 | face information etc. */ | |
4001 | ||
4002 | static void | |
4003 | reseat_at_previous_visible_line_start (it) | |
4004 | struct it *it; | |
4005 | { | |
4006 | back_to_previous_visible_line_start (it); | |
4007 | reseat (it, it->current.pos, 1); | |
4008 | CHECK_IT (it); | |
4009 | } | |
4010 | ||
4011 | ||
4012 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
4013 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
4014 | preceding the line start. Skip over invisible text that is so | |
4015 | because of selective display. Compute faces, overlays etc at the | |
4016 | new position. Note that this function does not skip over text that | |
4017 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
4018 | |
4019 | static void | |
312246d1 | 4020 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 4021 | struct it *it; |
312246d1 | 4022 | int on_newline_p; |
5f5c8ee5 | 4023 | { |
cafafe0b GM |
4024 | int newline_found_p, skipped_p = 0; |
4025 | ||
4026 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
4027 | ||
4028 | /* Skip over lines that are invisible because they are indented | |
4029 | more than the value of IT->selective. */ | |
4030 | if (it->selective > 0) | |
4031 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 4032 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
a67e162b | 4033 | (double) it->selective)) /* iftc */ |
a77dc1ec GM |
4034 | { |
4035 | xassert (FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
4036 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
4037 | } | |
cafafe0b GM |
4038 | |
4039 | /* Position on the newline if that's what's requested. */ | |
4040 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 4041 | { |
cafafe0b | 4042 | if (STRINGP (it->string)) |
5f5c8ee5 | 4043 | { |
cafafe0b GM |
4044 | if (IT_STRING_CHARPOS (*it) > 0) |
4045 | { | |
4046 | --IT_STRING_CHARPOS (*it); | |
4047 | --IT_STRING_BYTEPOS (*it); | |
4048 | } | |
5f5c8ee5 | 4049 | } |
cafafe0b | 4050 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
4051 | { |
4052 | --IT_CHARPOS (*it); | |
cafafe0b GM |
4053 | --IT_BYTEPOS (*it); |
4054 | reseat (it, it->current.pos, 0); | |
312246d1 | 4055 | } |
5f5c8ee5 | 4056 | } |
cafafe0b GM |
4057 | else if (skipped_p) |
4058 | reseat (it, it->current.pos, 0); | |
2311178e | 4059 | |
5f5c8ee5 GM |
4060 | CHECK_IT (it); |
4061 | } | |
4062 | ||
4063 | ||
4064 | \f | |
4065 | /*********************************************************************** | |
4066 | Changing an iterator's position | |
4067 | ***********************************************************************/ | |
4068 | ||
4069 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
4070 | is non-zero, always check for text properties at the new position. | |
4071 | Otherwise, text properties are only looked up if POS >= | |
4072 | IT->check_charpos of a property. */ | |
4073 | ||
4074 | static void | |
4075 | reseat (it, pos, force_p) | |
4076 | struct it *it; | |
4077 | struct text_pos pos; | |
4078 | int force_p; | |
4079 | { | |
4080 | int original_pos = IT_CHARPOS (*it); | |
4081 | ||
4082 | reseat_1 (it, pos, 0); | |
4083 | ||
4084 | /* Determine where to check text properties. Avoid doing it | |
4085 | where possible because text property lookup is very expensive. */ | |
4086 | if (force_p | |
4087 | || CHARPOS (pos) > it->stop_charpos | |
4088 | || CHARPOS (pos) < original_pos) | |
4089 | handle_stop (it); | |
4090 | ||
4091 | CHECK_IT (it); | |
4092 | } | |
4093 | ||
4094 | ||
4095 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
4096 | IT->stop_pos to POS, also. */ | |
4097 | ||
4098 | static void | |
4099 | reseat_1 (it, pos, set_stop_p) | |
4100 | struct it *it; | |
4101 | struct text_pos pos; | |
4102 | int set_stop_p; | |
4103 | { | |
4104 | /* Don't call this function when scanning a C string. */ | |
4105 | xassert (it->s == NULL); | |
4106 | ||
4107 | /* POS must be a reasonable value. */ | |
4108 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
4109 | ||
4110 | it->current.pos = it->position = pos; | |
4111 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 4112 | it->end_charpos = ZV; |
5f5c8ee5 GM |
4113 | it->dpvec = NULL; |
4114 | it->current.dpvec_index = -1; | |
4115 | it->current.overlay_string_index = -1; | |
4116 | IT_STRING_CHARPOS (*it) = -1; | |
4117 | IT_STRING_BYTEPOS (*it) = -1; | |
4118 | it->string = Qnil; | |
4119 | it->method = next_element_from_buffer; | |
06fd3792 | 4120 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 4121 | it->sp = 0; |
4aad61f8 | 4122 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
4123 | |
4124 | if (set_stop_p) | |
4125 | it->stop_charpos = CHARPOS (pos); | |
4126 | } | |
4127 | ||
4128 | ||
4129 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
4130 | If S is non-null, it is a C string to iterate over. Otherwise, | |
4131 | STRING gives a Lisp string to iterate over. | |
2311178e | 4132 | |
5f5c8ee5 GM |
4133 | If PRECISION > 0, don't return more then PRECISION number of |
4134 | characters from the string. | |
4135 | ||
4136 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
4137 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
4138 | field width. | |
4139 | ||
4140 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
4141 | MULTIBYTE > 0 means enable it, | |
4142 | MULTIBYTE < 0 means use IT->multibyte_p. | |
4143 | ||
4144 | IT must be initialized via a prior call to init_iterator before | |
4145 | calling this function. */ | |
4146 | ||
4147 | static void | |
4148 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
4149 | struct it *it; | |
4150 | unsigned char *s; | |
4151 | Lisp_Object string; | |
4152 | int charpos; | |
4153 | int precision, field_width, multibyte; | |
4154 | { | |
4155 | /* No region in strings. */ | |
4156 | it->region_beg_charpos = it->region_end_charpos = -1; | |
4157 | ||
4158 | /* No text property checks performed by default, but see below. */ | |
4159 | it->stop_charpos = -1; | |
4160 | ||
4161 | /* Set iterator position and end position. */ | |
4162 | bzero (&it->current, sizeof it->current); | |
4163 | it->current.overlay_string_index = -1; | |
4164 | it->current.dpvec_index = -1; | |
5f5c8ee5 | 4165 | xassert (charpos >= 0); |
2311178e | 4166 | |
e719f5ae GM |
4167 | /* If STRING is specified, use its multibyteness, otherwise use the |
4168 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 4169 | if (multibyte >= 0) |
5f5c8ee5 | 4170 | it->multibyte_p = multibyte > 0; |
2311178e | 4171 | |
5f5c8ee5 GM |
4172 | if (s == NULL) |
4173 | { | |
4174 | xassert (STRINGP (string)); | |
4175 | it->string = string; | |
4176 | it->s = NULL; | |
2051c264 | 4177 | it->end_charpos = it->string_nchars = SCHARS (string); |
5f5c8ee5 GM |
4178 | it->method = next_element_from_string; |
4179 | it->current.string_pos = string_pos (charpos, string); | |
4180 | } | |
4181 | else | |
4182 | { | |
4183 | it->s = s; | |
4184 | it->string = Qnil; | |
4185 | ||
4186 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
4187 | for displaying C strings. */ | |
4188 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
4189 | if (it->multibyte_p) | |
4190 | { | |
4191 | it->current.pos = c_string_pos (charpos, s, 1); | |
4192 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
4193 | } | |
4194 | else | |
4195 | { | |
4196 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
4197 | it->end_charpos = it->string_nchars = strlen (s); | |
4198 | } | |
2311178e | 4199 | |
5f5c8ee5 GM |
4200 | it->method = next_element_from_c_string; |
4201 | } | |
4202 | ||
4203 | /* PRECISION > 0 means don't return more than PRECISION characters | |
4204 | from the string. */ | |
4205 | if (precision > 0 && it->end_charpos - charpos > precision) | |
4206 | it->end_charpos = it->string_nchars = charpos + precision; | |
4207 | ||
4208 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
4209 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
4210 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
4211 | padding with `-' at the end of a mode line. */ | |
4212 | if (field_width < 0) | |
4213 | field_width = INFINITY; | |
4214 | if (field_width > it->end_charpos - charpos) | |
4215 | it->end_charpos = charpos + field_width; | |
4216 | ||
4217 | /* Use the standard display table for displaying strings. */ | |
4218 | if (DISP_TABLE_P (Vstandard_display_table)) | |
4219 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
4220 | ||
4221 | it->stop_charpos = charpos; | |
4222 | CHECK_IT (it); | |
4223 | } | |
4224 | ||
4225 | ||
4226 | \f | |
4227 | /*********************************************************************** | |
4228 | Iteration | |
4229 | ***********************************************************************/ | |
4230 | ||
4231 | /* Load IT's display element fields with information about the next | |
4232 | display element from the current position of IT. Value is zero if | |
4233 | end of buffer (or C string) is reached. */ | |
4234 | ||
4235 | int | |
4236 | get_next_display_element (it) | |
4237 | struct it *it; | |
4238 | { | |
7d0393cf | 4239 | /* Non-zero means that we found a display element. Zero means that |
5f5c8ee5 GM |
4240 | we hit the end of what we iterate over. Performance note: the |
4241 | function pointer `method' used here turns out to be faster than | |
4242 | using a sequence of if-statements. */ | |
4243 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
4244 | |
4245 | if (it->what == IT_CHARACTER) | |
4246 | { | |
4247 | /* Map via display table or translate control characters. | |
4248 | IT->c, IT->len etc. have been set to the next character by | |
4249 | the function call above. If we have a display table, and it | |
4250 | contains an entry for IT->c, translate it. Don't do this if | |
4251 | IT->c itself comes from a display table, otherwise we could | |
4252 | end up in an infinite recursion. (An alternative could be to | |
4253 | count the recursion depth of this function and signal an | |
4254 | error when a certain maximum depth is reached.) Is it worth | |
4255 | it? */ | |
4256 | if (success_p && it->dpvec == NULL) | |
4257 | { | |
4258 | Lisp_Object dv; | |
4259 | ||
4260 | if (it->dp | |
4261 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
4262 | VECTORP (dv))) | |
4263 | { | |
4264 | struct Lisp_Vector *v = XVECTOR (dv); | |
4265 | ||
4266 | /* Return the first character from the display table | |
4267 | entry, if not empty. If empty, don't display the | |
4268 | current character. */ | |
4269 | if (v->size) | |
4270 | { | |
4271 | it->dpvec_char_len = it->len; | |
4272 | it->dpvec = v->contents; | |
4273 | it->dpend = v->contents + v->size; | |
4274 | it->current.dpvec_index = 0; | |
4275 | it->method = next_element_from_display_vector; | |
7eee47cc GM |
4276 | success_p = get_next_display_element (it); |
4277 | } | |
4278 | else | |
4279 | { | |
4280 | set_iterator_to_next (it, 0); | |
4281 | success_p = get_next_display_element (it); | |
5f5c8ee5 | 4282 | } |
5f5c8ee5 GM |
4283 | } |
4284 | ||
4285 | /* Translate control characters into `\003' or `^C' form. | |
4286 | Control characters coming from a display table entry are | |
4287 | currently not translated because we use IT->dpvec to hold | |
4288 | the translation. This could easily be changed but I | |
197516c2 KH |
4289 | don't believe that it is worth doing. |
4290 | ||
fa831cf8 KH |
4291 | If it->multibyte_p is nonzero, eight-bit characters and |
4292 | non-printable multibyte characters are also translated to | |
4293 | octal form. | |
4294 | ||
4295 | If it->multibyte_p is zero, eight-bit characters that | |
4296 | don't have corresponding multibyte char code are also | |
4297 | translated to octal form. */ | |
ba197fe6 | 4298 | else if ((it->c < ' ' |
5f5c8ee5 | 4299 | && (it->area != TEXT_AREA |
c6e89d6c | 4300 | || (it->c != '\n' && it->c != '\t'))) |
fa831cf8 KH |
4301 | || (it->multibyte_p |
4302 | ? ((it->c >= 127 | |
4303 | && it->len == 1) | |
4304 | || !CHAR_PRINTABLE_P (it->c)) | |
ba197fe6 | 4305 | : (it->c >= 127 |
fa831cf8 | 4306 | && it->c == unibyte_char_to_multibyte (it->c)))) |
5f5c8ee5 GM |
4307 | { |
4308 | /* IT->c is a control character which must be displayed | |
4309 | either as '\003' or as `^C' where the '\\' and '^' | |
4310 | can be defined in the display table. Fill | |
4311 | IT->ctl_chars with glyphs for what we have to | |
4312 | display. Then, set IT->dpvec to these glyphs. */ | |
4313 | GLYPH g; | |
4314 | ||
54c85a23 | 4315 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
4316 | { |
4317 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
4318 | if (it->dp | |
4319 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
4320 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
4321 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
4322 | else | |
4323 | g = FAST_MAKE_GLYPH ('^', 0); | |
4324 | XSETINT (it->ctl_chars[0], g); | |
4325 | ||
4326 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
4327 | XSETINT (it->ctl_chars[1], g); | |
4328 | ||
4329 | /* Set up IT->dpvec and return first character from it. */ | |
4330 | it->dpvec_char_len = it->len; | |
4331 | it->dpvec = it->ctl_chars; | |
4332 | it->dpend = it->dpvec + 2; | |
4333 | it->current.dpvec_index = 0; | |
4334 | it->method = next_element_from_display_vector; | |
4335 | get_next_display_element (it); | |
4336 | } | |
4337 | else | |
4338 | { | |
260a86a0 | 4339 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 4340 | int len; |
197516c2 KH |
4341 | int i; |
4342 | GLYPH escape_glyph; | |
4343 | ||
5f5c8ee5 GM |
4344 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
4345 | if (it->dp | |
4346 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
4347 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 4348 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 4349 | else |
197516c2 KH |
4350 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
4351 | ||
c5924f47 KH |
4352 | if (SINGLE_BYTE_CHAR_P (it->c)) |
4353 | str[0] = it->c, len = 1; | |
4354 | else | |
ea9dd091 GM |
4355 | { |
4356 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
4357 | if (len < 0) | |
4358 | { | |
4359 | /* It's an invalid character, which | |
4360 | shouldn't happen actually, but due to | |
4361 | bugs it may happen. Let's print the char | |
4362 | as is, there's not much meaningful we can | |
4363 | do with it. */ | |
4364 | str[0] = it->c; | |
4365 | str[1] = it->c >> 8; | |
4366 | str[2] = it->c >> 16; | |
4367 | str[3] = it->c >> 24; | |
4368 | len = 4; | |
4369 | } | |
4370 | } | |
c5924f47 | 4371 | |
197516c2 KH |
4372 | for (i = 0; i < len; i++) |
4373 | { | |
4374 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
4375 | /* Insert three more glyphs into IT->ctl_chars for | |
4376 | the octal display of the character. */ | |
2311178e | 4377 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); |
197516c2 | 4378 | XSETINT (it->ctl_chars[i * 4 + 1], g); |
2311178e | 4379 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); |
197516c2 | 4380 | XSETINT (it->ctl_chars[i * 4 + 2], g); |
2311178e | 4381 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); |
197516c2 KH |
4382 | XSETINT (it->ctl_chars[i * 4 + 3], g); |
4383 | } | |
5f5c8ee5 GM |
4384 | |
4385 | /* Set up IT->dpvec and return the first character | |
4386 | from it. */ | |
4387 | it->dpvec_char_len = it->len; | |
4388 | it->dpvec = it->ctl_chars; | |
197516c2 | 4389 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
4390 | it->current.dpvec_index = 0; |
4391 | it->method = next_element_from_display_vector; | |
4392 | get_next_display_element (it); | |
4393 | } | |
4394 | } | |
4395 | } | |
4396 | ||
980806b6 KH |
4397 | /* Adjust face id for a multibyte character. There are no |
4398 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
4399 | if (it->multibyte_p |
4400 | && success_p | |
980806b6 | 4401 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 4402 | { |
980806b6 KH |
4403 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
4404 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
4405 | } |
4406 | } | |
4407 | ||
4408 | /* Is this character the last one of a run of characters with | |
4409 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
4410 | if (it->face_box_p | |
4411 | && it->s == NULL) | |
4412 | { | |
4413 | int face_id; | |
4414 | struct face *face; | |
4415 | ||
4416 | it->end_of_box_run_p | |
4417 | = ((face_id = face_after_it_pos (it), | |
4418 | face_id != it->face_id) | |
4419 | && (face = FACE_FROM_ID (it->f, face_id), | |
4420 | face->box == FACE_NO_BOX)); | |
4421 | } | |
4422 | ||
4423 | /* Value is 0 if end of buffer or string reached. */ | |
4424 | return success_p; | |
4425 | } | |
4426 | ||
4427 | ||
4428 | /* Move IT to the next display element. | |
4429 | ||
cafafe0b GM |
4430 | RESEAT_P non-zero means if called on a newline in buffer text, |
4431 | skip to the next visible line start. | |
4432 | ||
5f5c8ee5 GM |
4433 | Functions get_next_display_element and set_iterator_to_next are |
4434 | separate because I find this arrangement easier to handle than a | |
4435 | get_next_display_element function that also increments IT's | |
4436 | position. The way it is we can first look at an iterator's current | |
4437 | display element, decide whether it fits on a line, and if it does, | |
4438 | increment the iterator position. The other way around we probably | |
4439 | would either need a flag indicating whether the iterator has to be | |
4440 | incremented the next time, or we would have to implement a | |
4441 | decrement position function which would not be easy to write. */ | |
4442 | ||
4443 | void | |
cafafe0b | 4444 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 4445 | struct it *it; |
cafafe0b | 4446 | int reseat_p; |
5f5c8ee5 | 4447 | { |
483de32b GM |
4448 | /* Reset flags indicating start and end of a sequence of characters |
4449 | with box. Reset them at the start of this function because | |
4450 | moving the iterator to a new position might set them. */ | |
4451 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
2311178e | 4452 | |
5f5c8ee5 GM |
4453 | if (it->method == next_element_from_buffer) |
4454 | { | |
4455 | /* The current display element of IT is a character from | |
4456 | current_buffer. Advance in the buffer, and maybe skip over | |
4457 | invisible lines that are so because of selective display. */ | |
cafafe0b | 4458 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 4459 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4460 | else |
4461 | { | |
4462 | xassert (it->len != 0); | |
4463 | IT_BYTEPOS (*it) += it->len; | |
4464 | IT_CHARPOS (*it) += 1; | |
4465 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
4466 | } | |
4467 | } | |
260a86a0 KH |
4468 | else if (it->method == next_element_from_composition) |
4469 | { | |
4470 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
4471 | if (STRINGP (it->string)) | |
4472 | { | |
4473 | IT_STRING_BYTEPOS (*it) += it->len; | |
4474 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
4475 | it->method = next_element_from_string; | |
4476 | goto consider_string_end; | |
4477 | } | |
4478 | else | |
4479 | { | |
4480 | IT_BYTEPOS (*it) += it->len; | |
4481 | IT_CHARPOS (*it) += it->cmp_len; | |
4482 | it->method = next_element_from_buffer; | |
4483 | } | |
4484 | } | |
5f5c8ee5 GM |
4485 | else if (it->method == next_element_from_c_string) |
4486 | { | |
4487 | /* Current display element of IT is from a C string. */ | |
4488 | IT_BYTEPOS (*it) += it->len; | |
4489 | IT_CHARPOS (*it) += 1; | |
4490 | } | |
4491 | else if (it->method == next_element_from_display_vector) | |
4492 | { | |
4493 | /* Current display element of IT is from a display table entry. | |
4494 | Advance in the display table definition. Reset it to null if | |
4495 | end reached, and continue with characters from buffers/ | |
4496 | strings. */ | |
4497 | ++it->current.dpvec_index; | |
286bcbc9 | 4498 | |
980806b6 KH |
4499 | /* Restore face of the iterator to what they were before the |
4500 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 4501 | it->face_id = it->saved_face_id; |
2311178e | 4502 | |
5f5c8ee5 GM |
4503 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
4504 | { | |
4505 | if (it->s) | |
4506 | it->method = next_element_from_c_string; | |
4507 | else if (STRINGP (it->string)) | |
4508 | it->method = next_element_from_string; | |
4509 | else | |
4510 | it->method = next_element_from_buffer; | |
4511 | ||
4512 | it->dpvec = NULL; | |
4513 | it->current.dpvec_index = -1; | |
4514 | ||
312246d1 GM |
4515 | /* Skip over characters which were displayed via IT->dpvec. */ |
4516 | if (it->dpvec_char_len < 0) | |
4517 | reseat_at_next_visible_line_start (it, 1); | |
4518 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
4519 | { |
4520 | it->len = it->dpvec_char_len; | |
cafafe0b | 4521 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 GM |
4522 | } |
4523 | } | |
4524 | } | |
4525 | else if (it->method == next_element_from_string) | |
4526 | { | |
4527 | /* Current display element is a character from a Lisp string. */ | |
4528 | xassert (it->s == NULL && STRINGP (it->string)); | |
4529 | IT_STRING_BYTEPOS (*it) += it->len; | |
4530 | IT_STRING_CHARPOS (*it) += 1; | |
2311178e | 4531 | |
5f5c8ee5 GM |
4532 | consider_string_end: |
4533 | ||
4534 | if (it->current.overlay_string_index >= 0) | |
4535 | { | |
4536 | /* IT->string is an overlay string. Advance to the | |
4537 | next, if there is one. */ | |
2051c264 | 4538 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4539 | next_overlay_string (it); |
4540 | } | |
4541 | else | |
4542 | { | |
4543 | /* IT->string is not an overlay string. If we reached | |
4544 | its end, and there is something on IT->stack, proceed | |
4545 | with what is on the stack. This can be either another | |
4546 | string, this time an overlay string, or a buffer. */ | |
2051c264 | 4547 | if (IT_STRING_CHARPOS (*it) == SCHARS (it->string) |
5f5c8ee5 GM |
4548 | && it->sp > 0) |
4549 | { | |
4550 | pop_it (it); | |
4551 | if (!STRINGP (it->string)) | |
4552 | it->method = next_element_from_buffer; | |
b2046df8 GM |
4553 | else |
4554 | goto consider_string_end; | |
5f5c8ee5 GM |
4555 | } |
4556 | } | |
4557 | } | |
4558 | else if (it->method == next_element_from_image | |
4559 | || it->method == next_element_from_stretch) | |
4560 | { | |
4561 | /* The position etc with which we have to proceed are on | |
4562 | the stack. The position may be at the end of a string, | |
4563 | if the `display' property takes up the whole string. */ | |
4564 | pop_it (it); | |
4565 | it->image_id = 0; | |
4566 | if (STRINGP (it->string)) | |
4567 | { | |
4568 | it->method = next_element_from_string; | |
4569 | goto consider_string_end; | |
4570 | } | |
4571 | else | |
4572 | it->method = next_element_from_buffer; | |
4573 | } | |
4574 | else | |
4575 | /* There are no other methods defined, so this should be a bug. */ | |
4576 | abort (); | |
4577 | ||
5f5c8ee5 GM |
4578 | xassert (it->method != next_element_from_string |
4579 | || (STRINGP (it->string) | |
4580 | && IT_STRING_CHARPOS (*it) >= 0)); | |
4581 | } | |
4582 | ||
4583 | ||
4584 | /* Load IT's display element fields with information about the next | |
4585 | display element which comes from a display table entry or from the | |
4586 | result of translating a control character to one of the forms `^C' | |
4587 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
4588 | ||
4589 | static int | |
4590 | next_element_from_display_vector (it) | |
4591 | struct it *it; | |
4592 | { | |
4593 | /* Precondition. */ | |
4594 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
4595 | ||
4596 | /* Remember the current face id in case glyphs specify faces. | |
4597 | IT's face is restored in set_iterator_to_next. */ | |
4598 | it->saved_face_id = it->face_id; | |
2311178e | 4599 | |
5f5c8ee5 GM |
4600 | if (INTEGERP (*it->dpvec) |
4601 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
4602 | { | |
4603 | int lface_id; | |
4604 | GLYPH g; | |
4605 | ||
4606 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
4607 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 4608 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
4609 | |
4610 | /* The entry may contain a face id to use. Such a face id is | |
4611 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 4612 | zero means no face is specified. */ |
5f5c8ee5 GM |
4613 | lface_id = FAST_GLYPH_FACE (g); |
4614 | if (lface_id) | |
4615 | { | |
969065c3 | 4616 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
4617 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
4618 | if (face_id >= 0) | |
969065c3 | 4619 | it->face_id = face_id; |
5f5c8ee5 GM |
4620 | } |
4621 | } | |
4622 | else | |
4623 | /* Display table entry is invalid. Return a space. */ | |
4624 | it->c = ' ', it->len = 1; | |
4625 | ||
4626 | /* Don't change position and object of the iterator here. They are | |
4627 | still the values of the character that had this display table | |
4628 | entry or was translated, and that's what we want. */ | |
4629 | it->what = IT_CHARACTER; | |
4630 | return 1; | |
4631 | } | |
4632 | ||
4633 | ||
4634 | /* Load IT with the next display element from Lisp string IT->string. | |
4635 | IT->current.string_pos is the current position within the string. | |
4636 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
4637 | overlay string. */ | |
4638 | ||
4639 | static int | |
4640 | next_element_from_string (it) | |
4641 | struct it *it; | |
4642 | { | |
4643 | struct text_pos position; | |
4644 | ||
4645 | xassert (STRINGP (it->string)); | |
4646 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
4647 | position = it->current.string_pos; | |
4648 | ||
4649 | /* Time to check for invisible text? */ | |
4650 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
4651 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
4652 | { | |
4653 | handle_stop (it); | |
4654 | ||
4655 | /* Since a handler may have changed IT->method, we must | |
4656 | recurse here. */ | |
4657 | return get_next_display_element (it); | |
4658 | } | |
4659 | ||
4660 | if (it->current.overlay_string_index >= 0) | |
4661 | { | |
4662 | /* Get the next character from an overlay string. In overlay | |
4663 | strings, There is no field width or padding with spaces to | |
4664 | do. */ | |
2051c264 | 4665 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4666 | { |
4667 | it->what = IT_EOB; | |
4668 | return 0; | |
4669 | } | |
4670 | else if (STRING_MULTIBYTE (it->string)) | |
4671 | { | |
2051c264 | 4672 | int remaining = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
4673 | const unsigned char *s = (SDATA (it->string) |
4674 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4675 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
4676 | } |
4677 | else | |
4678 | { | |
2051c264 | 4679 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
4680 | it->len = 1; |
4681 | } | |
4682 | } | |
4683 | else | |
4684 | { | |
4685 | /* Get the next character from a Lisp string that is not an | |
4686 | overlay string. Such strings come from the mode line, for | |
4687 | example. We may have to pad with spaces, or truncate the | |
4688 | string. See also next_element_from_c_string. */ | |
4689 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
4690 | { | |
4691 | it->what = IT_EOB; | |
4692 | return 0; | |
4693 | } | |
4694 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
4695 | { | |
4696 | /* Pad with spaces. */ | |
4697 | it->c = ' ', it->len = 1; | |
4698 | CHARPOS (position) = BYTEPOS (position) = -1; | |
4699 | } | |
4700 | else if (STRING_MULTIBYTE (it->string)) | |
4701 | { | |
2051c264 | 4702 | int maxlen = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
4703 | const unsigned char *s = (SDATA (it->string) |
4704 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4705 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
4706 | } |
4707 | else | |
4708 | { | |
2051c264 | 4709 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
4710 | it->len = 1; |
4711 | } | |
4712 | } | |
4713 | ||
4714 | /* Record what we have and where it came from. Note that we store a | |
4715 | buffer position in IT->position although it could arguably be a | |
4716 | string position. */ | |
4717 | it->what = IT_CHARACTER; | |
4718 | it->object = it->string; | |
4719 | it->position = position; | |
4720 | return 1; | |
4721 | } | |
4722 | ||
4723 | ||
4724 | /* Load IT with next display element from C string IT->s. | |
4725 | IT->string_nchars is the maximum number of characters to return | |
4726 | from the string. IT->end_charpos may be greater than | |
4727 | IT->string_nchars when this function is called, in which case we | |
4728 | may have to return padding spaces. Value is zero if end of string | |
4729 | reached, including padding spaces. */ | |
4730 | ||
4731 | static int | |
4732 | next_element_from_c_string (it) | |
4733 | struct it *it; | |
4734 | { | |
4735 | int success_p = 1; | |
2311178e | 4736 | |
5f5c8ee5 GM |
4737 | xassert (it->s); |
4738 | it->what = IT_CHARACTER; | |
4739 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
4740 | it->object = Qnil; | |
2311178e | 4741 | |
5f5c8ee5 GM |
4742 | /* IT's position can be greater IT->string_nchars in case a field |
4743 | width or precision has been specified when the iterator was | |
4744 | initialized. */ | |
4745 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4746 | { | |
4747 | /* End of the game. */ | |
4748 | it->what = IT_EOB; | |
4749 | success_p = 0; | |
4750 | } | |
4751 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
4752 | { | |
4753 | /* Pad with spaces. */ | |
4754 | it->c = ' ', it->len = 1; | |
4755 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
4756 | } | |
4757 | else if (it->multibyte_p) | |
4758 | { | |
4759 | /* Implementation note: The calls to strlen apparently aren't a | |
4760 | performance problem because there is no noticeable performance | |
4761 | difference between Emacs running in unibyte or multibyte mode. */ | |
4762 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
4763 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
4764 | maxlen, &it->len); | |
5f5c8ee5 GM |
4765 | } |
4766 | else | |
4767 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
2311178e | 4768 | |
5f5c8ee5 GM |
4769 | return success_p; |
4770 | } | |
4771 | ||
4772 | ||
4773 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
4774 | The definition of the ellipsis glyphs may come from a display table | |
4775 | entry. This function Fills IT with the first glyph from the | |
4776 | ellipsis if an ellipsis is to be displayed. */ | |
4777 | ||
13f19968 | 4778 | static int |
5f5c8ee5 GM |
4779 | next_element_from_ellipsis (it) |
4780 | struct it *it; | |
4781 | { | |
13f19968 | 4782 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 4783 | { |
13f19968 GM |
4784 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
4785 | { | |
4786 | /* Use the display table definition for `...'. Invalid glyphs | |
4787 | will be handled by the method returning elements from dpvec. */ | |
4788 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
4789 | it->dpvec_char_len = it->len; | |
4790 | it->dpvec = v->contents; | |
4791 | it->dpend = v->contents + v->size; | |
4792 | it->current.dpvec_index = 0; | |
4793 | it->method = next_element_from_display_vector; | |
4794 | } | |
4795 | else | |
4796 | { | |
4797 | /* Use default `...' which is stored in default_invis_vector. */ | |
4798 | it->dpvec_char_len = it->len; | |
4799 | it->dpvec = default_invis_vector; | |
4800 | it->dpend = default_invis_vector + 3; | |
4801 | it->current.dpvec_index = 0; | |
4802 | it->method = next_element_from_display_vector; | |
4803 | } | |
5f5c8ee5 | 4804 | } |
13f19968 | 4805 | else |
54918e2b | 4806 | { |
4aad61f8 GM |
4807 | /* The face at the current position may be different from the |
4808 | face we find after the invisible text. Remember what it | |
4809 | was in IT->saved_face_id, and signal that it's there by | |
4810 | setting face_before_selective_p. */ | |
4811 | it->saved_face_id = it->face_id; | |
54918e2b GM |
4812 | it->method = next_element_from_buffer; |
4813 | reseat_at_next_visible_line_start (it, 1); | |
4aad61f8 | 4814 | it->face_before_selective_p = 1; |
54918e2b | 4815 | } |
2311178e | 4816 | |
13f19968 | 4817 | return get_next_display_element (it); |
5f5c8ee5 GM |
4818 | } |
4819 | ||
4820 | ||
4821 | /* Deliver an image display element. The iterator IT is already | |
4822 | filled with image information (done in handle_display_prop). Value | |
4823 | is always 1. */ | |
2311178e | 4824 | |
5f5c8ee5 GM |
4825 | |
4826 | static int | |
4827 | next_element_from_image (it) | |
4828 | struct it *it; | |
4829 | { | |
4830 | it->what = IT_IMAGE; | |
4831 | return 1; | |
4832 | } | |
4833 | ||
4834 | ||
4835 | /* Fill iterator IT with next display element from a stretch glyph | |
4836 | property. IT->object is the value of the text property. Value is | |
4837 | always 1. */ | |
4838 | ||
4839 | static int | |
4840 | next_element_from_stretch (it) | |
4841 | struct it *it; | |
4842 | { | |
4843 | it->what = IT_STRETCH; | |
4844 | return 1; | |
4845 | } | |
4846 | ||
4847 | ||
4848 | /* Load IT with the next display element from current_buffer. Value | |
4849 | is zero if end of buffer reached. IT->stop_charpos is the next | |
4850 | position at which to stop and check for text properties or buffer | |
4851 | end. */ | |
4852 | ||
4853 | static int | |
4854 | next_element_from_buffer (it) | |
4855 | struct it *it; | |
4856 | { | |
4857 | int success_p = 1; | |
4858 | ||
4859 | /* Check this assumption, otherwise, we would never enter the | |
4860 | if-statement, below. */ | |
4861 | xassert (IT_CHARPOS (*it) >= BEGV | |
4862 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
4863 | ||
4864 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
4865 | { | |
4866 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4867 | { | |
4868 | int overlay_strings_follow_p; | |
2311178e | 4869 | |
5f5c8ee5 GM |
4870 | /* End of the game, except when overlay strings follow that |
4871 | haven't been returned yet. */ | |
4872 | if (it->overlay_strings_at_end_processed_p) | |
4873 | overlay_strings_follow_p = 0; | |
4874 | else | |
4875 | { | |
4876 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 4877 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
4878 | } |
4879 | ||
4880 | if (overlay_strings_follow_p) | |
4881 | success_p = get_next_display_element (it); | |
4882 | else | |
4883 | { | |
4884 | it->what = IT_EOB; | |
4885 | it->position = it->current.pos; | |
4886 | success_p = 0; | |
4887 | } | |
4888 | } | |
4889 | else | |
4890 | { | |
4891 | handle_stop (it); | |
4892 | return get_next_display_element (it); | |
4893 | } | |
4894 | } | |
4895 | else | |
4896 | { | |
4897 | /* No face changes, overlays etc. in sight, so just return a | |
4898 | character from current_buffer. */ | |
4899 | unsigned char *p; | |
4900 | ||
4901 | /* Maybe run the redisplay end trigger hook. Performance note: | |
4902 | This doesn't seem to cost measurable time. */ | |
4903 | if (it->redisplay_end_trigger_charpos | |
4904 | && it->glyph_row | |
4905 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
4906 | run_redisplay_end_trigger_hook (it); | |
4907 | ||
4908 | /* Get the next character, maybe multibyte. */ | |
4909 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 4910 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
4911 | { |
4912 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
4913 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 4914 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
4915 | } |
4916 | else | |
4917 | it->c = *p, it->len = 1; | |
4918 | ||
4919 | /* Record what we have and where it came from. */ | |
4920 | it->what = IT_CHARACTER;; | |
4921 | it->object = it->w->buffer; | |
4922 | it->position = it->current.pos; | |
4923 | ||
4924 | /* Normally we return the character found above, except when we | |
4925 | really want to return an ellipsis for selective display. */ | |
4926 | if (it->selective) | |
4927 | { | |
4928 | if (it->c == '\n') | |
4929 | { | |
4930 | /* A value of selective > 0 means hide lines indented more | |
4931 | than that number of columns. */ | |
4932 | if (it->selective > 0 | |
4933 | && IT_CHARPOS (*it) + 1 < ZV | |
4934 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
4935 | IT_BYTEPOS (*it) + 1, | |
a67e162b | 4936 | (double) it->selective)) /* iftc */ |
312246d1 | 4937 | { |
13f19968 | 4938 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
4939 | it->dpvec_char_len = -1; |
4940 | } | |
5f5c8ee5 GM |
4941 | } |
4942 | else if (it->c == '\r' && it->selective == -1) | |
4943 | { | |
4944 | /* A value of selective == -1 means that everything from the | |
4945 | CR to the end of the line is invisible, with maybe an | |
4946 | ellipsis displayed for it. */ | |
13f19968 | 4947 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4948 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4949 | } |
4950 | } | |
4951 | } | |
4952 | ||
4953 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4954 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4955 | return success_p; |
4956 | } | |
4957 | ||
2311178e | 4958 | |
5f5c8ee5 GM |
4959 | /* Run the redisplay end trigger hook for IT. */ |
4960 | ||
4961 | static void | |
4962 | run_redisplay_end_trigger_hook (it) | |
4963 | struct it *it; | |
4964 | { | |
4965 | Lisp_Object args[3]; | |
4966 | ||
4967 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4968 | displaying something, or otherwise we should not run the hook. */ | |
4969 | xassert (it->glyph_row); | |
4970 | ||
4971 | /* Set up hook arguments. */ | |
4972 | args[0] = Qredisplay_end_trigger_functions; | |
4973 | args[1] = it->window; | |
4974 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4975 | it->redisplay_end_trigger_charpos = 0; | |
4976 | ||
4977 | /* Since we are *trying* to run these functions, don't try to run | |
4978 | them again, even if they get an error. */ | |
4979 | it->w->redisplay_end_trigger = Qnil; | |
4980 | Frun_hook_with_args (3, args); | |
2311178e | 4981 | |
5f5c8ee5 GM |
4982 | /* Notice if it changed the face of the character we are on. */ |
4983 | handle_face_prop (it); | |
4984 | } | |
4985 | ||
4986 | ||
260a86a0 KH |
4987 | /* Deliver a composition display element. The iterator IT is already |
4988 | filled with composition information (done in | |
4989 | handle_composition_prop). Value is always 1. */ | |
4990 | ||
4991 | static int | |
4992 | next_element_from_composition (it) | |
4993 | struct it *it; | |
4994 | { | |
4995 | it->what = IT_COMPOSITION; | |
4996 | it->position = (STRINGP (it->string) | |
4997 | ? it->current.string_pos | |
4998 | : it->current.pos); | |
4999 | return 1; | |
5000 | } | |
5001 | ||
5002 | ||
5f5c8ee5 GM |
5003 | \f |
5004 | /*********************************************************************** | |
5005 | Moving an iterator without producing glyphs | |
5006 | ***********************************************************************/ | |
5007 | ||
5008 | /* Move iterator IT to a specified buffer or X position within one | |
5009 | line on the display without producing glyphs. | |
5010 | ||
c53a1624 RS |
5011 | OP should be a bit mask including some or all of these bits: |
5012 | MOVE_TO_X: Stop on reaching x-position TO_X. | |
5013 | MOVE_TO_POS: Stop on reaching buffer or string position TO_CHARPOS. | |
5014 | Regardless of OP's value, stop in reaching the end of the display line. | |
5f5c8ee5 | 5015 | |
c53a1624 RS |
5016 | TO_X is normally a value 0 <= TO_X <= IT->last_visible_x. |
5017 | This means, in particular, that TO_X includes window's horizontal | |
5018 | scroll amount. | |
5f5c8ee5 | 5019 | |
c53a1624 RS |
5020 | The return value has several possible values that |
5021 | say what condition caused the scan to stop: | |
5f5c8ee5 GM |
5022 | |
5023 | MOVE_POS_MATCH_OR_ZV | |
5024 | - when TO_POS or ZV was reached. | |
2311178e | 5025 | |
5f5c8ee5 GM |
5026 | MOVE_X_REACHED |
5027 | -when TO_X was reached before TO_POS or ZV were reached. | |
2311178e | 5028 | |
5f5c8ee5 GM |
5029 | MOVE_LINE_CONTINUED |
5030 | - when we reached the end of the display area and the line must | |
5031 | be continued. | |
2311178e | 5032 | |
5f5c8ee5 GM |
5033 | MOVE_LINE_TRUNCATED |
5034 | - when we reached the end of the display area and the line is | |
5035 | truncated. | |
5036 | ||
5037 | MOVE_NEWLINE_OR_CR | |
5038 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
5039 | display is on. */ | |
5040 | ||
701552dd | 5041 | static enum move_it_result |
5f5c8ee5 GM |
5042 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
5043 | struct it *it; | |
5044 | int to_charpos, to_x, op; | |
5045 | { | |
5046 | enum move_it_result result = MOVE_UNDEFINED; | |
5047 | struct glyph_row *saved_glyph_row; | |
5048 | ||
5049 | /* Don't produce glyphs in produce_glyphs. */ | |
5050 | saved_glyph_row = it->glyph_row; | |
5051 | it->glyph_row = NULL; | |
5052 | ||
5f5c8ee5 GM |
5053 | while (1) |
5054 | { | |
ae26e27d | 5055 | int x, i, ascent = 0, descent = 0; |
2311178e | 5056 | |
5f5c8ee5 GM |
5057 | /* Stop when ZV or TO_CHARPOS reached. */ |
5058 | if (!get_next_display_element (it) | |
5059 | || ((op & MOVE_TO_POS) != 0 | |
5060 | && BUFFERP (it->object) | |
5061 | && IT_CHARPOS (*it) >= to_charpos)) | |
5062 | { | |
5063 | result = MOVE_POS_MATCH_OR_ZV; | |
5064 | break; | |
5065 | } | |
2311178e | 5066 | |
5f5c8ee5 GM |
5067 | /* The call to produce_glyphs will get the metrics of the |
5068 | display element IT is loaded with. We record in x the | |
5069 | x-position before this display element in case it does not | |
5070 | fit on the line. */ | |
5071 | x = it->current_x; | |
2311178e | 5072 | |
47589c8c GM |
5073 | /* Remember the line height so far in case the next element doesn't |
5074 | fit on the line. */ | |
5075 | if (!it->truncate_lines_p) | |
5076 | { | |
5077 | ascent = it->max_ascent; | |
5078 | descent = it->max_descent; | |
5079 | } | |
2311178e | 5080 | |
5f5c8ee5 GM |
5081 | PRODUCE_GLYPHS (it); |
5082 | ||
5083 | if (it->area != TEXT_AREA) | |
5084 | { | |
cafafe0b | 5085 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5086 | continue; |
5087 | } | |
5088 | ||
5089 | /* The number of glyphs we get back in IT->nglyphs will normally | |
5090 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
5091 | character on a terminal frame, or (iii) a line end. For the | |
5092 | second case, IT->nglyphs - 1 padding glyphs will be present | |
5093 | (on X frames, there is only one glyph produced for a | |
5094 | composite character. | |
5095 | ||
5096 | The behavior implemented below means, for continuation lines, | |
5097 | that as many spaces of a TAB as fit on the current line are | |
5098 | displayed there. For terminal frames, as many glyphs of a | |
5099 | multi-glyph character are displayed in the current line, too. | |
5100 | This is what the old redisplay code did, and we keep it that | |
5101 | way. Under X, the whole shape of a complex character must | |
5102 | fit on the line or it will be completely displayed in the | |
5103 | next line. | |
5104 | ||
5105 | Note that both for tabs and padding glyphs, all glyphs have | |
5106 | the same width. */ | |
5107 | if (it->nglyphs) | |
5108 | { | |
5109 | /* More than one glyph or glyph doesn't fit on line. All | |
5110 | glyphs have the same width. */ | |
5111 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
5112 | int new_x; | |
2311178e | 5113 | |
5f5c8ee5 GM |
5114 | for (i = 0; i < it->nglyphs; ++i, x = new_x) |
5115 | { | |
5116 | new_x = x + single_glyph_width; | |
5117 | ||
5118 | /* We want to leave anything reaching TO_X to the caller. */ | |
5119 | if ((op & MOVE_TO_X) && new_x > to_x) | |
5120 | { | |
5121 | it->current_x = x; | |
5122 | result = MOVE_X_REACHED; | |
5123 | break; | |
5124 | } | |
5125 | else if (/* Lines are continued. */ | |
5126 | !it->truncate_lines_p | |
5127 | && (/* And glyph doesn't fit on the line. */ | |
5128 | new_x > it->last_visible_x | |
5129 | /* Or it fits exactly and we're on a window | |
5130 | system frame. */ | |
5131 | || (new_x == it->last_visible_x | |
5132 | && FRAME_WINDOW_P (it->f)))) | |
5133 | { | |
5134 | if (/* IT->hpos == 0 means the very first glyph | |
5135 | doesn't fit on the line, e.g. a wide image. */ | |
5136 | it->hpos == 0 | |
5137 | || (new_x == it->last_visible_x | |
5138 | && FRAME_WINDOW_P (it->f))) | |
5139 | { | |
5140 | ++it->hpos; | |
5141 | it->current_x = new_x; | |
5142 | if (i == it->nglyphs - 1) | |
cafafe0b | 5143 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5144 | } |
5145 | else | |
47589c8c GM |
5146 | { |
5147 | it->current_x = x; | |
5148 | it->max_ascent = ascent; | |
5149 | it->max_descent = descent; | |
5150 | } | |
2311178e | 5151 | |
47589c8c GM |
5152 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", |
5153 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
5154 | result = MOVE_LINE_CONTINUED; |
5155 | break; | |
5156 | } | |
5157 | else if (new_x > it->first_visible_x) | |
5158 | { | |
5159 | /* Glyph is visible. Increment number of glyphs that | |
5160 | would be displayed. */ | |
5161 | ++it->hpos; | |
5162 | } | |
5163 | else | |
5164 | { | |
2311178e | 5165 | /* Glyph is completely off the left margin of the display |
5f5c8ee5 GM |
5166 | area. Nothing to do. */ |
5167 | } | |
5168 | } | |
5169 | ||
5170 | if (result != MOVE_UNDEFINED) | |
5171 | break; | |
5172 | } | |
5173 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
5174 | { | |
5175 | /* Stop when TO_X specified and reached. This check is | |
5176 | necessary here because of lines consisting of a line end, | |
5177 | only. The line end will not produce any glyphs and we | |
5178 | would never get MOVE_X_REACHED. */ | |
5179 | xassert (it->nglyphs == 0); | |
5180 | result = MOVE_X_REACHED; | |
5181 | break; | |
5182 | } | |
2311178e | 5183 | |
5f5c8ee5 GM |
5184 | /* Is this a line end? If yes, we're done. */ |
5185 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5186 | { | |
5187 | result = MOVE_NEWLINE_OR_CR; | |
5188 | break; | |
5189 | } | |
2311178e | 5190 | |
5f5c8ee5 GM |
5191 | /* The current display element has been consumed. Advance |
5192 | to the next. */ | |
cafafe0b | 5193 | set_iterator_to_next (it, 1); |
2311178e | 5194 | |
5f5c8ee5 GM |
5195 | /* Stop if lines are truncated and IT's current x-position is |
5196 | past the right edge of the window now. */ | |
5197 | if (it->truncate_lines_p | |
5198 | && it->current_x >= it->last_visible_x) | |
5199 | { | |
5200 | result = MOVE_LINE_TRUNCATED; | |
5201 | break; | |
5202 | } | |
5203 | } | |
5204 | ||
5205 | /* Restore the iterator settings altered at the beginning of this | |
5206 | function. */ | |
5207 | it->glyph_row = saved_glyph_row; | |
5208 | return result; | |
5209 | } | |
5210 | ||
5211 | ||
9b2bba76 RS |
5212 | /* Move IT forward until it satisfies one or more of the criteria in |
5213 | TO_CHARPOS, TO_X, TO_Y, and TO_VPOS. | |
5214 | ||
5215 | OP is a bit-mask that specifies where to stop, and in particular, | |
5216 | which of those four position arguments makes a difference. See the | |
5217 | description of enum move_operation_enum. | |
2311178e | 5218 | |
5f5c8ee5 GM |
5219 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a |
5220 | screen line, this function will set IT to the next position > | |
5221 | TO_CHARPOS. */ | |
5222 | ||
5223 | void | |
5224 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
5225 | struct it *it; | |
5226 | int to_charpos, to_x, to_y, to_vpos; | |
5227 | int op; | |
5228 | { | |
5229 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
5230 | int line_height; | |
47589c8c | 5231 | int reached = 0; |
5f5c8ee5 | 5232 | |
47589c8c | 5233 | for (;;) |
5f5c8ee5 GM |
5234 | { |
5235 | if (op & MOVE_TO_VPOS) | |
5236 | { | |
5237 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
5238 | start of the line TO_VPOS. */ | |
5239 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
5240 | { | |
5241 | if (it->vpos == to_vpos) | |
47589c8c GM |
5242 | { |
5243 | reached = 1; | |
5244 | break; | |
5245 | } | |
5246 | else | |
5247 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
5248 | } |
5249 | else | |
5250 | { | |
5251 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
5252 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
5253 | if (it->vpos == to_vpos) |
5254 | { | |
5255 | reached = 2; | |
5256 | break; | |
5257 | } | |
2311178e | 5258 | |
5f5c8ee5 GM |
5259 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
5260 | ||
5261 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
5262 | { |
5263 | reached = 3; | |
5264 | break; | |
5265 | } | |
5f5c8ee5 GM |
5266 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
5267 | { | |
5268 | /* We have reached TO_X but not in the line we want. */ | |
5269 | skip = move_it_in_display_line_to (it, to_charpos, | |
5270 | -1, MOVE_TO_POS); | |
5271 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5272 | { |
5273 | reached = 4; | |
5274 | break; | |
5275 | } | |
5f5c8ee5 GM |
5276 | } |
5277 | } | |
5278 | } | |
5279 | else if (op & MOVE_TO_Y) | |
5280 | { | |
5281 | struct it it_backup; | |
2311178e | 5282 | |
5f5c8ee5 GM |
5283 | /* TO_Y specified means stop at TO_X in the line containing |
5284 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
5285 | problem is that we can't really tell whether the line | |
5286 | contains TO_Y before we have completely scanned it, and | |
5287 | this may skip past TO_X. What we do is to first scan to | |
5288 | TO_X. | |
5289 | ||
5290 | If TO_X is not specified, use a TO_X of zero. The reason | |
5291 | is to make the outcome of this function more predictable. | |
5292 | If we didn't use TO_X == 0, we would stop at the end of | |
5293 | the line which is probably not what a caller would expect | |
5294 | to happen. */ | |
5295 | skip = move_it_in_display_line_to (it, to_charpos, | |
5296 | ((op & MOVE_TO_X) | |
5297 | ? to_x : 0), | |
5298 | (MOVE_TO_X | |
5299 | | (op & MOVE_TO_POS))); | |
5300 | ||
5301 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
5302 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5303 | { |
5304 | reached = 5; | |
5305 | break; | |
5306 | } | |
2311178e | 5307 | |
5f5c8ee5 GM |
5308 | /* If TO_X was reached, we would like to know whether TO_Y |
5309 | is in the line. This can only be said if we know the | |
5310 | total line height which requires us to scan the rest of | |
5311 | the line. */ | |
5f5c8ee5 GM |
5312 | if (skip == MOVE_X_REACHED) |
5313 | { | |
5314 | it_backup = *it; | |
47589c8c | 5315 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5316 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
5317 | op & MOVE_TO_POS); | |
47589c8c | 5318 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5319 | } |
5320 | ||
5321 | /* Now, decide whether TO_Y is in this line. */ | |
5322 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 5323 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
2311178e | 5324 | |
5f5c8ee5 GM |
5325 | if (to_y >= it->current_y |
5326 | && to_y < it->current_y + line_height) | |
5327 | { | |
5328 | if (skip == MOVE_X_REACHED) | |
5329 | /* If TO_Y is in this line and TO_X was reached above, | |
5330 | we scanned too far. We have to restore IT's settings | |
5331 | to the ones before skipping. */ | |
5332 | *it = it_backup; | |
47589c8c | 5333 | reached = 6; |
5f5c8ee5 GM |
5334 | } |
5335 | else if (skip == MOVE_X_REACHED) | |
5336 | { | |
5337 | skip = skip2; | |
5338 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 5339 | reached = 7; |
5f5c8ee5 GM |
5340 | } |
5341 | ||
47589c8c | 5342 | if (reached) |
5f5c8ee5 GM |
5343 | break; |
5344 | } | |
5345 | else | |
5346 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
5347 | ||
5348 | switch (skip) | |
5349 | { | |
5350 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
5351 | reached = 8; |
5352 | goto out; | |
5f5c8ee5 GM |
5353 | |
5354 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 5355 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5356 | it->continuation_lines_width = 0; |
5357 | break; | |
5358 | ||
5359 | case MOVE_LINE_TRUNCATED: | |
5360 | it->continuation_lines_width = 0; | |
312246d1 | 5361 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5362 | if ((op & MOVE_TO_POS) != 0 |
5363 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
5364 | { |
5365 | reached = 9; | |
5366 | goto out; | |
5367 | } | |
5f5c8ee5 GM |
5368 | break; |
5369 | ||
5370 | case MOVE_LINE_CONTINUED: | |
5371 | it->continuation_lines_width += it->current_x; | |
5372 | break; | |
5373 | ||
5374 | default: | |
5375 | abort (); | |
5376 | } | |
5377 | ||
5378 | /* Reset/increment for the next run. */ | |
5379 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
5380 | it->current_x = it->hpos = 0; | |
5381 | it->current_y += it->max_ascent + it->max_descent; | |
5382 | ++it->vpos; | |
5383 | last_height = it->max_ascent + it->max_descent; | |
5384 | last_max_ascent = it->max_ascent; | |
5385 | it->max_ascent = it->max_descent = 0; | |
5386 | } | |
2311178e | 5387 | |
47589c8c GM |
5388 | out: |
5389 | ||
5390 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
5391 | } |
5392 | ||
5393 | ||
5394 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
5395 | ||
5396 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
5397 | means move IT backward to the preceding line start or BEGV. This | |
5398 | function may move over more than DY pixels if IT->current_y - DY | |
5399 | ends up in the middle of a line; in this case IT->current_y will be | |
5400 | set to the top of the line moved to. */ | |
5401 | ||
5402 | void | |
5403 | move_it_vertically_backward (it, dy) | |
5404 | struct it *it; | |
5405 | int dy; | |
5406 | { | |
79ddf6f7 GM |
5407 | int nlines, h; |
5408 | struct it it2, it3; | |
5f5c8ee5 | 5409 | int start_pos = IT_CHARPOS (*it); |
2311178e | 5410 | |
5f5c8ee5 GM |
5411 | xassert (dy >= 0); |
5412 | ||
5413 | /* Estimate how many newlines we must move back. */ | |
5414 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
5415 | ||
5416 | /* Set the iterator's position that many lines back. */ | |
5417 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
5418 | back_to_previous_visible_line_start (it); | |
5419 | ||
5420 | /* Reseat the iterator here. When moving backward, we don't want | |
5421 | reseat to skip forward over invisible text, set up the iterator | |
5422 | to deliver from overlay strings at the new position etc. So, | |
5423 | use reseat_1 here. */ | |
5424 | reseat_1 (it, it->current.pos, 1); | |
5425 | ||
5426 | /* We are now surely at a line start. */ | |
5427 | it->current_x = it->hpos = 0; | |
0e47bbf7 | 5428 | it->continuation_lines_width = 0; |
5f5c8ee5 GM |
5429 | |
5430 | /* Move forward and see what y-distance we moved. First move to the | |
5431 | start of the next line so that we get its height. We need this | |
5432 | height to be able to tell whether we reached the specified | |
5433 | y-distance. */ | |
5434 | it2 = *it; | |
5435 | it2.max_ascent = it2.max_descent = 0; | |
5436 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
5437 | MOVE_TO_POS | MOVE_TO_VPOS); | |
5438 | xassert (IT_CHARPOS (*it) >= BEGV); | |
79ddf6f7 | 5439 | it3 = it2; |
2311178e | 5440 | |
5f5c8ee5 GM |
5441 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
5442 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5443 | h = it2.current_y - it->current_y; | |
5444 | nlines = it2.vpos - it->vpos; | |
5445 | ||
5446 | /* Correct IT's y and vpos position. */ | |
5447 | it->vpos -= nlines; | |
5448 | it->current_y -= h; | |
2311178e | 5449 | |
5f5c8ee5 GM |
5450 | if (dy == 0) |
5451 | { | |
5452 | /* DY == 0 means move to the start of the screen line. The | |
5453 | value of nlines is > 0 if continuation lines were involved. */ | |
5454 | if (nlines > 0) | |
5455 | move_it_by_lines (it, nlines, 1); | |
5456 | xassert (IT_CHARPOS (*it) <= start_pos); | |
5457 | } | |
5458 | else if (nlines) | |
5459 | { | |
5460 | /* The y-position we try to reach. Note that h has been | |
5461 | subtracted in front of the if-statement. */ | |
5462 | int target_y = it->current_y + h - dy; | |
79ddf6f7 GM |
5463 | int y0 = it3.current_y; |
5464 | int y1 = line_bottom_y (&it3); | |
5465 | int line_height = y1 - y0; | |
f7ccfc8c | 5466 | |
5f5c8ee5 GM |
5467 | /* If we did not reach target_y, try to move further backward if |
5468 | we can. If we moved too far backward, try to move forward. */ | |
5469 | if (target_y < it->current_y | |
79ddf6f7 GM |
5470 | /* This is heuristic. In a window that's 3 lines high, with |
5471 | a line height of 13 pixels each, recentering with point | |
5472 | on the bottom line will try to move -39/2 = 19 pixels | |
5473 | backward. Try to avoid moving into the first line. */ | |
798dbe1f | 5474 | && it->current_y - target_y > line_height / 3 * 2 |
5f5c8ee5 GM |
5475 | && IT_CHARPOS (*it) > BEGV) |
5476 | { | |
f7ccfc8c GM |
5477 | TRACE_MOVE ((stderr, " not far enough -> move_vert %d\n", |
5478 | target_y - it->current_y)); | |
5f5c8ee5 GM |
5479 | move_it_vertically (it, target_y - it->current_y); |
5480 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5481 | } | |
5482 | else if (target_y >= it->current_y + line_height | |
5483 | && IT_CHARPOS (*it) < ZV) | |
5484 | { | |
55591976 | 5485 | /* Should move forward by at least one line, maybe more. |
2311178e | 5486 | |
55591976 GM |
5487 | Note: Calling move_it_by_lines can be expensive on |
5488 | terminal frames, where compute_motion is used (via | |
5489 | vmotion) to do the job, when there are very long lines | |
5490 | and truncate-lines is nil. That's the reason for | |
5491 | treating terminal frames specially here. */ | |
2311178e | 5492 | |
55591976 GM |
5493 | if (!FRAME_WINDOW_P (it->f)) |
5494 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
5495 | else | |
f7ccfc8c | 5496 | { |
55591976 GM |
5497 | do |
5498 | { | |
5499 | move_it_by_lines (it, 1, 1); | |
5500 | } | |
5501 | while (target_y >= line_bottom_y (it) && IT_CHARPOS (*it) < ZV); | |
f7ccfc8c | 5502 | } |
f7ccfc8c | 5503 | |
5f5c8ee5 GM |
5504 | xassert (IT_CHARPOS (*it) >= BEGV); |
5505 | } | |
5506 | } | |
5507 | } | |
5508 | ||
5509 | ||
5510 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
5511 | move backwards. DY = 0 means move to start of screen line. At the | |
5512 | end, IT will be on the start of a screen line. */ | |
5513 | ||
2311178e | 5514 | void |
5f5c8ee5 GM |
5515 | move_it_vertically (it, dy) |
5516 | struct it *it; | |
5517 | int dy; | |
5518 | { | |
5519 | if (dy <= 0) | |
5520 | move_it_vertically_backward (it, -dy); | |
5521 | else if (dy > 0) | |
5522 | { | |
47589c8c | 5523 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
5524 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
5525 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 5526 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5527 | |
5528 | /* If buffer ends in ZV without a newline, move to the start of | |
5529 | the line to satisfy the post-condition. */ | |
5530 | if (IT_CHARPOS (*it) == ZV | |
5531 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
5532 | move_it_by_lines (it, 0, 0); | |
5533 | } | |
5534 | } | |
5535 | ||
5536 | ||
47fc2c10 GM |
5537 | /* Move iterator IT past the end of the text line it is in. */ |
5538 | ||
5539 | void | |
5540 | move_it_past_eol (it) | |
5541 | struct it *it; | |
5542 | { | |
5543 | enum move_it_result rc; | |
2311178e | 5544 | |
47fc2c10 GM |
5545 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); |
5546 | if (rc == MOVE_NEWLINE_OR_CR) | |
5547 | set_iterator_to_next (it, 0); | |
5548 | } | |
5549 | ||
5550 | ||
2c79b732 GM |
5551 | #if 0 /* Currently not used. */ |
5552 | ||
5f5c8ee5 GM |
5553 | /* Return non-zero if some text between buffer positions START_CHARPOS |
5554 | and END_CHARPOS is invisible. IT->window is the window for text | |
5555 | property lookup. */ | |
5556 | ||
5557 | static int | |
5558 | invisible_text_between_p (it, start_charpos, end_charpos) | |
5559 | struct it *it; | |
5560 | int start_charpos, end_charpos; | |
5561 | { | |
5f5c8ee5 GM |
5562 | Lisp_Object prop, limit; |
5563 | int invisible_found_p; | |
2311178e | 5564 | |
5f5c8ee5 GM |
5565 | xassert (it != NULL && start_charpos <= end_charpos); |
5566 | ||
5567 | /* Is text at START invisible? */ | |
5568 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
5569 | it->window); | |
5570 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
5571 | invisible_found_p = 1; | |
5572 | else | |
5573 | { | |
016b5642 MB |
5574 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
5575 | Qinvisible, Qnil, | |
5576 | make_number (end_charpos)); | |
5f5c8ee5 GM |
5577 | invisible_found_p = XFASTINT (limit) < end_charpos; |
5578 | } | |
5579 | ||
5580 | return invisible_found_p; | |
5f5c8ee5 GM |
5581 | } |
5582 | ||
2c79b732 GM |
5583 | #endif /* 0 */ |
5584 | ||
5f5c8ee5 GM |
5585 | |
5586 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
5587 | negative means move up. DVPOS == 0 means move to the start of the | |
5588 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
5589 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
5590 | ||
5591 | Further optimization ideas: If we would know that IT->f doesn't use | |
5592 | a face with proportional font, we could be faster for | |
5593 | truncate-lines nil. */ | |
5594 | ||
5595 | void | |
5596 | move_it_by_lines (it, dvpos, need_y_p) | |
5597 | struct it *it; | |
5598 | int dvpos, need_y_p; | |
5599 | { | |
5600 | struct position pos; | |
2311178e | 5601 | |
5f5c8ee5 GM |
5602 | if (!FRAME_WINDOW_P (it->f)) |
5603 | { | |
5604 | struct text_pos textpos; | |
2311178e | 5605 | |
5f5c8ee5 GM |
5606 | /* We can use vmotion on frames without proportional fonts. */ |
5607 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
5608 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
5609 | reseat (it, textpos, 1); | |
5610 | it->vpos += pos.vpos; | |
5611 | it->current_y += pos.vpos; | |
5612 | } | |
5613 | else if (dvpos == 0) | |
5614 | { | |
5615 | /* DVPOS == 0 means move to the start of the screen line. */ | |
5616 | move_it_vertically_backward (it, 0); | |
5617 | xassert (it->current_x == 0 && it->hpos == 0); | |
5618 | } | |
5619 | else if (dvpos > 0) | |
2c79b732 | 5620 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); |
5f5c8ee5 GM |
5621 | else |
5622 | { | |
5623 | struct it it2; | |
5624 | int start_charpos, i; | |
2311178e | 5625 | |
e8660d73 GM |
5626 | /* Start at the beginning of the screen line containing IT's |
5627 | position. */ | |
5628 | move_it_vertically_backward (it, 0); | |
2311178e | 5629 | |
5f5c8ee5 GM |
5630 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
5631 | start_charpos = IT_CHARPOS (*it); | |
5632 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
5633 | back_to_previous_visible_line_start (it); | |
5634 | reseat (it, it->current.pos, 1); | |
5635 | it->current_x = it->hpos = 0; | |
5636 | ||
5637 | /* Above call may have moved too far if continuation lines | |
5638 | are involved. Scan forward and see if it did. */ | |
5639 | it2 = *it; | |
5640 | it2.vpos = it2.current_y = 0; | |
5641 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
5642 | it->vpos -= it2.vpos; | |
5643 | it->current_y -= it2.current_y; | |
5644 | it->current_x = it->hpos = 0; | |
5645 | ||
5646 | /* If we moved too far, move IT some lines forward. */ | |
5647 | if (it2.vpos > -dvpos) | |
5648 | { | |
5649 | int delta = it2.vpos + dvpos; | |
5650 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
5651 | } | |
5652 | } | |
5653 | } | |
5654 | ||
3824b1a6 AS |
5655 | /* Return 1 if IT points into the middle of a display vector. */ |
5656 | ||
5657 | int | |
5658 | in_display_vector_p (it) | |
5659 | struct it *it; | |
5660 | { | |
5661 | return (it->method == next_element_from_display_vector | |
5662 | && it->current.dpvec_index > 0 | |
5663 | && it->dpvec + it->current.dpvec_index != it->dpend); | |
5664 | } | |
5f5c8ee5 GM |
5665 | |
5666 | \f | |
5667 | /*********************************************************************** | |
5668 | Messages | |
5669 | ***********************************************************************/ | |
5670 | ||
5671 | ||
937248bc GM |
5672 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
5673 | to *Messages*. */ | |
5674 | ||
5675 | void | |
5676 | add_to_log (format, arg1, arg2) | |
5677 | char *format; | |
5678 | Lisp_Object arg1, arg2; | |
5679 | { | |
5680 | Lisp_Object args[3]; | |
5681 | Lisp_Object msg, fmt; | |
5682 | char *buffer; | |
5683 | int len; | |
5684 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5685 | ||
ae794295 GM |
5686 | /* Do nothing if called asynchronously. Inserting text into |
5687 | a buffer may call after-change-functions and alike and | |
5688 | that would means running Lisp asynchronously. */ | |
5689 | if (handling_signal) | |
5690 | return; | |
5691 | ||
937248bc GM |
5692 | fmt = msg = Qnil; |
5693 | GCPRO4 (fmt, msg, arg1, arg2); | |
2311178e | 5694 | |
937248bc GM |
5695 | args[0] = fmt = build_string (format); |
5696 | args[1] = arg1; | |
5697 | args[2] = arg2; | |
6fc556fd | 5698 | msg = Fformat (3, args); |
937248bc | 5699 | |
2051c264 | 5700 | len = SBYTES (msg) + 1; |
937248bc | 5701 | buffer = (char *) alloca (len); |
2051c264 | 5702 | bcopy (SDATA (msg), buffer, len); |
2311178e | 5703 | |
796184bc | 5704 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
5705 | UNGCPRO; |
5706 | } | |
5707 | ||
5708 | ||
5f5c8ee5 GM |
5709 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
5710 | ||
5711 | void | |
5712 | message_log_maybe_newline () | |
5713 | { | |
5714 | if (message_log_need_newline) | |
5715 | message_dolog ("", 0, 1, 0); | |
5716 | } | |
5717 | ||
5718 | ||
1e313f28 | 5719 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
5720 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
5721 | nonzero, means interpret the contents of M as multibyte. This | |
5722 | function calls low-level routines in order to bypass text property | |
5723 | hooks, etc. which might not be safe to run. */ | |
5724 | ||
5725 | void | |
1e313f28 | 5726 | message_dolog (m, nbytes, nlflag, multibyte) |
50f80c2f | 5727 | const char *m; |
1e313f28 | 5728 | int nbytes, nlflag, multibyte; |
5f5c8ee5 | 5729 | { |
a67e162b RS |
5730 | if (!NILP (Vmemory_full)) |
5731 | return; | |
5732 | ||
5f5c8ee5 GM |
5733 | if (!NILP (Vmessage_log_max)) |
5734 | { | |
5735 | struct buffer *oldbuf; | |
5736 | Lisp_Object oldpoint, oldbegv, oldzv; | |
5737 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
5738 | int point_at_end = 0; | |
5739 | int zv_at_end = 0; | |
5740 | Lisp_Object old_deactivate_mark, tem; | |
6052529b | 5741 | struct gcpro gcpro1; |
5f5c8ee5 GM |
5742 | |
5743 | old_deactivate_mark = Vdeactivate_mark; | |
5744 | oldbuf = current_buffer; | |
6a94510a | 5745 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
5746 | current_buffer->undo_list = Qt; |
5747 | ||
b14bc55e RS |
5748 | oldpoint = message_dolog_marker1; |
5749 | set_marker_restricted (oldpoint, make_number (PT), Qnil); | |
5750 | oldbegv = message_dolog_marker2; | |
5751 | set_marker_restricted (oldbegv, make_number (BEGV), Qnil); | |
5752 | oldzv = message_dolog_marker3; | |
5753 | set_marker_restricted (oldzv, make_number (ZV), Qnil); | |
5754 | GCPRO1 (old_deactivate_mark); | |
5f5c8ee5 GM |
5755 | |
5756 | if (PT == Z) | |
5757 | point_at_end = 1; | |
5758 | if (ZV == Z) | |
5759 | zv_at_end = 1; | |
5760 | ||
5761 | BEGV = BEG; | |
5762 | BEGV_BYTE = BEG_BYTE; | |
5763 | ZV = Z; | |
5764 | ZV_BYTE = Z_BYTE; | |
5765 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5766 | ||
5767 | /* Insert the string--maybe converting multibyte to single byte | |
5768 | or vice versa, so that all the text fits the buffer. */ | |
5769 | if (multibyte | |
5770 | && NILP (current_buffer->enable_multibyte_characters)) | |
5771 | { | |
1e313f28 | 5772 | int i, c, char_bytes; |
5f5c8ee5 | 5773 | unsigned char work[1]; |
2311178e | 5774 | |
5f5c8ee5 GM |
5775 | /* Convert a multibyte string to single-byte |
5776 | for the *Message* buffer. */ | |
6e57ec5e | 5777 | for (i = 0; i < nbytes; i += char_bytes) |
5f5c8ee5 | 5778 | { |
1e313f28 | 5779 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
5780 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
5781 | ? c | |
5782 | : multibyte_char_to_unibyte (c, Qnil)); | |
5783 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5784 | } | |
5785 | } | |
5786 | else if (! multibyte | |
5787 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
5788 | { | |
1e313f28 | 5789 | int i, c, char_bytes; |
5f5c8ee5 | 5790 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 5791 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
5792 | /* Convert a single-byte string to multibyte |
5793 | for the *Message* buffer. */ | |
1e313f28 | 5794 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
5795 | { |
5796 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
5797 | char_bytes = CHAR_STRING (c, str); |
5798 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
5799 | } |
5800 | } | |
1e313f28 GM |
5801 | else if (nbytes) |
5802 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
5803 | |
5804 | if (nlflag) | |
5805 | { | |
5806 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
5807 | insert_1 ("\n", 1, 1, 0, 0); | |
5808 | ||
5809 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
5810 | this_bol = PT; | |
5811 | this_bol_byte = PT_BYTE; | |
5812 | ||
b14bc55e RS |
5813 | /* See if this line duplicates the previous one. |
5814 | If so, combine duplicates. */ | |
5f5c8ee5 GM |
5815 | if (this_bol > BEG) |
5816 | { | |
5817 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
5818 | prev_bol = PT; | |
5819 | prev_bol_byte = PT_BYTE; | |
5820 | ||
5821 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
5822 | this_bol, this_bol_byte); | |
5823 | if (dup) | |
5824 | { | |
5825 | del_range_both (prev_bol, prev_bol_byte, | |
5826 | this_bol, this_bol_byte, 0); | |
5827 | if (dup > 1) | |
5828 | { | |
5829 | char dupstr[40]; | |
5830 | int duplen; | |
5831 | ||
5832 | /* If you change this format, don't forget to also | |
5833 | change message_log_check_duplicate. */ | |
5834 | sprintf (dupstr, " [%d times]", dup); | |
5835 | duplen = strlen (dupstr); | |
5836 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
5837 | insert_1 (dupstr, duplen, 1, 0, 1); | |
5838 | } | |
5839 | } | |
5840 | } | |
5841 | ||
b14bc55e RS |
5842 | /* If we have more than the desired maximum number of lines |
5843 | in the *Messages* buffer now, delete the oldest ones. | |
5844 | This is safe because we don't have undo in this buffer. */ | |
5845 | ||
5f5c8ee5 GM |
5846 | if (NATNUMP (Vmessage_log_max)) |
5847 | { | |
5848 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
5849 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
5850 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
5851 | } | |
5852 | } | |
5853 | BEGV = XMARKER (oldbegv)->charpos; | |
5854 | BEGV_BYTE = marker_byte_position (oldbegv); | |
5855 | ||
5856 | if (zv_at_end) | |
5857 | { | |
5858 | ZV = Z; | |
5859 | ZV_BYTE = Z_BYTE; | |
5860 | } | |
5861 | else | |
5862 | { | |
5863 | ZV = XMARKER (oldzv)->charpos; | |
5864 | ZV_BYTE = marker_byte_position (oldzv); | |
5865 | } | |
5866 | ||
5867 | if (point_at_end) | |
5868 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5869 | else | |
5870 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
5871 | Lisp code. */ | |
5872 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
5873 | XMARKER (oldpoint)->bytepos); | |
5874 | ||
5875 | UNGCPRO; | |
b14bc55e RS |
5876 | unchain_marker (oldpoint); |
5877 | unchain_marker (oldbegv); | |
5878 | unchain_marker (oldzv); | |
5f5c8ee5 GM |
5879 | |
5880 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
5881 | set_buffer_internal (oldbuf); | |
5882 | if (NILP (tem)) | |
5883 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
5884 | message_log_need_newline = !nlflag; | |
5885 | Vdeactivate_mark = old_deactivate_mark; | |
5886 | } | |
5887 | } | |
5888 | ||
5889 | ||
5890 | /* We are at the end of the buffer after just having inserted a newline. | |
5891 | (Note: We depend on the fact we won't be crossing the gap.) | |
5892 | Check to see if the most recent message looks a lot like the previous one. | |
5893 | Return 0 if different, 1 if the new one should just replace it, or a | |
5894 | value N > 1 if we should also append " [N times]". */ | |
5895 | ||
5896 | static int | |
5897 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
5898 | int prev_bol, this_bol; | |
5899 | int prev_bol_byte, this_bol_byte; | |
5900 | { | |
5901 | int i; | |
5902 | int len = Z_BYTE - 1 - this_bol_byte; | |
5903 | int seen_dots = 0; | |
5904 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
5905 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
5906 | ||
5907 | for (i = 0; i < len; i++) | |
5908 | { | |
509633e3 | 5909 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
5910 | seen_dots = 1; |
5911 | if (p1[i] != p2[i]) | |
5912 | return seen_dots; | |
5913 | } | |
5914 | p1 += len; | |
5915 | if (*p1 == '\n') | |
5916 | return 2; | |
5917 | if (*p1++ == ' ' && *p1++ == '[') | |
5918 | { | |
5919 | int n = 0; | |
5920 | while (*p1 >= '0' && *p1 <= '9') | |
5921 | n = n * 10 + *p1++ - '0'; | |
5922 | if (strncmp (p1, " times]\n", 8) == 0) | |
5923 | return n+1; | |
5924 | } | |
5925 | return 0; | |
5926 | } | |
5927 | ||
5928 | ||
1e313f28 GM |
5929 | /* Display an echo area message M with a specified length of NBYTES |
5930 | bytes. The string may include null characters. If M is 0, clear | |
5931 | out any existing message, and let the mini-buffer text show | |
5932 | through. | |
5f5c8ee5 GM |
5933 | |
5934 | The buffer M must continue to exist until after the echo area gets | |
5935 | cleared or some other message gets displayed there. This means do | |
5936 | not pass text that is stored in a Lisp string; do not pass text in | |
5937 | a buffer that was alloca'd. */ | |
5938 | ||
5939 | void | |
1e313f28 | 5940 | message2 (m, nbytes, multibyte) |
50f80c2f | 5941 | const char *m; |
1e313f28 | 5942 | int nbytes; |
5f5c8ee5 GM |
5943 | int multibyte; |
5944 | { | |
5945 | /* First flush out any partial line written with print. */ | |
5946 | message_log_maybe_newline (); | |
5947 | if (m) | |
1e313f28 GM |
5948 | message_dolog (m, nbytes, 1, multibyte); |
5949 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5950 | } |
5951 | ||
5952 | ||
5953 | /* The non-logging counterpart of message2. */ | |
5954 | ||
5955 | void | |
1e313f28 | 5956 | message2_nolog (m, nbytes, multibyte) |
50f80c2f | 5957 | const char *m; |
e3383b6f | 5958 | int nbytes, multibyte; |
5f5c8ee5 | 5959 | { |
886bd6f2 | 5960 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5961 | message_enable_multibyte = multibyte; |
5962 | ||
5963 | if (noninteractive) | |
5964 | { | |
5965 | if (noninteractive_need_newline) | |
5966 | putc ('\n', stderr); | |
5967 | noninteractive_need_newline = 0; | |
5968 | if (m) | |
1e313f28 | 5969 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
5970 | if (cursor_in_echo_area == 0) |
5971 | fprintf (stderr, "\n"); | |
5972 | fflush (stderr); | |
5973 | } | |
5974 | /* A null message buffer means that the frame hasn't really been | |
5975 | initialized yet. Error messages get reported properly by | |
5976 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 5977 | else if (INTERACTIVE |
886bd6f2 GM |
5978 | && sf->glyphs_initialized_p |
5979 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5980 | { |
5981 | Lisp_Object mini_window; | |
5982 | struct frame *f; | |
5983 | ||
5984 | /* Get the frame containing the mini-buffer | |
5985 | that the selected frame is using. */ | |
886bd6f2 | 5986 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5987 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5988 | ||
5989 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5990 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
5991 | && ! FRAME_VISIBLE_P (f)) |
5992 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
5993 | ||
5994 | if (m) | |
5995 | { | |
1e313f28 | 5996 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
5997 | if (minibuffer_auto_raise) |
5998 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5999 | } | |
6000 | else | |
c6e89d6c | 6001 | clear_message (1, 1); |
5f5c8ee5 | 6002 | |
c6e89d6c | 6003 | do_pending_window_change (0); |
5f5c8ee5 | 6004 | echo_area_display (1); |
c6e89d6c | 6005 | do_pending_window_change (0); |
5f5c8ee5 GM |
6006 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
6007 | (*frame_up_to_date_hook) (f); | |
6008 | } | |
6009 | } | |
6010 | ||
6011 | ||
c6e89d6c GM |
6012 | /* Display an echo area message M with a specified length of NBYTES |
6013 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
6014 | string, clear out any existing message, and let the mini-buffer |
6015 | text show through. */ | |
6016 | ||
6017 | void | |
c6e89d6c | 6018 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 6019 | Lisp_Object m; |
c6e89d6c | 6020 | int nbytes; |
5f5c8ee5 GM |
6021 | int multibyte; |
6022 | { | |
6023 | struct gcpro gcpro1; | |
6024 | ||
6025 | GCPRO1 (m); | |
2311178e | 6026 | |
5f5c8ee5 GM |
6027 | /* First flush out any partial line written with print. */ |
6028 | message_log_maybe_newline (); | |
6029 | if (STRINGP (m)) | |
2051c264 | 6030 | message_dolog (SDATA (m), nbytes, 1, multibyte); |
c6e89d6c | 6031 | message3_nolog (m, nbytes, multibyte); |
5f5c8ee5 GM |
6032 | |
6033 | UNGCPRO; | |
6034 | } | |
6035 | ||
6036 | ||
6037 | /* The non-logging version of message3. */ | |
6038 | ||
6039 | void | |
c6e89d6c | 6040 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 6041 | Lisp_Object m; |
c6e89d6c | 6042 | int nbytes, multibyte; |
5f5c8ee5 | 6043 | { |
886bd6f2 | 6044 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6045 | message_enable_multibyte = multibyte; |
6046 | ||
6047 | if (noninteractive) | |
6048 | { | |
6049 | if (noninteractive_need_newline) | |
6050 | putc ('\n', stderr); | |
6051 | noninteractive_need_newline = 0; | |
6052 | if (STRINGP (m)) | |
2051c264 | 6053 | fwrite (SDATA (m), nbytes, 1, stderr); |
5f5c8ee5 GM |
6054 | if (cursor_in_echo_area == 0) |
6055 | fprintf (stderr, "\n"); | |
6056 | fflush (stderr); | |
6057 | } | |
6058 | /* A null message buffer means that the frame hasn't really been | |
6059 | initialized yet. Error messages get reported properly by | |
6060 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 6061 | else if (INTERACTIVE |
886bd6f2 GM |
6062 | && sf->glyphs_initialized_p |
6063 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
6064 | { |
6065 | Lisp_Object mini_window; | |
c6e89d6c | 6066 | Lisp_Object frame; |
5f5c8ee5 GM |
6067 | struct frame *f; |
6068 | ||
6069 | /* Get the frame containing the mini-buffer | |
6070 | that the selected frame is using. */ | |
886bd6f2 | 6071 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6072 | frame = XWINDOW (mini_window)->frame; |
6073 | f = XFRAME (frame); | |
5f5c8ee5 GM |
6074 | |
6075 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 6076 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
6077 | && !FRAME_VISIBLE_P (f)) |
6078 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 6079 | |
2051c264 | 6080 | if (STRINGP (m) && SCHARS (m) > 0) |
5f5c8ee5 | 6081 | { |
c6e89d6c | 6082 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
6083 | if (minibuffer_auto_raise) |
6084 | Fraise_frame (frame); | |
5f5c8ee5 GM |
6085 | } |
6086 | else | |
c6e89d6c | 6087 | clear_message (1, 1); |
5f5c8ee5 | 6088 | |
c6e89d6c | 6089 | do_pending_window_change (0); |
5f5c8ee5 | 6090 | echo_area_display (1); |
c6e89d6c | 6091 | do_pending_window_change (0); |
5f5c8ee5 GM |
6092 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
6093 | (*frame_up_to_date_hook) (f); | |
6094 | } | |
6095 | } | |
6096 | ||
6097 | ||
6098 | /* Display a null-terminated echo area message M. If M is 0, clear | |
6099 | out any existing message, and let the mini-buffer text show through. | |
6100 | ||
6101 | The buffer M must continue to exist until after the echo area gets | |
6102 | cleared or some other message gets displayed there. Do not pass | |
6103 | text that is stored in a Lisp string. Do not pass text in a buffer | |
6104 | that was alloca'd. */ | |
6105 | ||
6106 | void | |
6107 | message1 (m) | |
6108 | char *m; | |
6109 | { | |
6110 | message2 (m, (m ? strlen (m) : 0), 0); | |
6111 | } | |
6112 | ||
6113 | ||
6114 | /* The non-logging counterpart of message1. */ | |
6115 | ||
6116 | void | |
6117 | message1_nolog (m) | |
6118 | char *m; | |
6119 | { | |
6120 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
6121 | } | |
6122 | ||
6123 | /* Display a message M which contains a single %s | |
6124 | which gets replaced with STRING. */ | |
6125 | ||
6126 | void | |
6127 | message_with_string (m, string, log) | |
6128 | char *m; | |
6129 | Lisp_Object string; | |
6130 | int log; | |
6131 | { | |
5b6d51b6 RS |
6132 | CHECK_STRING (string); |
6133 | ||
5f5c8ee5 GM |
6134 | if (noninteractive) |
6135 | { | |
6136 | if (m) | |
6137 | { | |
6138 | if (noninteractive_need_newline) | |
6139 | putc ('\n', stderr); | |
6140 | noninteractive_need_newline = 0; | |
2051c264 | 6141 | fprintf (stderr, m, SDATA (string)); |
5f5c8ee5 GM |
6142 | if (cursor_in_echo_area == 0) |
6143 | fprintf (stderr, "\n"); | |
6144 | fflush (stderr); | |
6145 | } | |
6146 | } | |
6147 | else if (INTERACTIVE) | |
6148 | { | |
6149 | /* The frame whose minibuffer we're going to display the message on. | |
6150 | It may be larger than the selected frame, so we need | |
6151 | to use its buffer, not the selected frame's buffer. */ | |
6152 | Lisp_Object mini_window; | |
886bd6f2 | 6153 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6154 | |
6155 | /* Get the frame containing the minibuffer | |
6156 | that the selected frame is using. */ | |
886bd6f2 | 6157 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6158 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6159 | ||
6160 | /* A null message buffer means that the frame hasn't really been | |
6161 | initialized yet. Error messages get reported properly by | |
6162 | cmd_error, so this must be just an informative message; toss it. */ | |
6163 | if (FRAME_MESSAGE_BUF (f)) | |
6164 | { | |
eb484132 GM |
6165 | Lisp_Object args[2], message; |
6166 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 6167 | |
eb484132 GM |
6168 | args[0] = build_string (m); |
6169 | args[1] = message = string; | |
78e17433 | 6170 | GCPRO2 (args[0], message); |
eb484132 | 6171 | gcpro1.nvars = 2; |
2311178e | 6172 | |
eb484132 | 6173 | message = Fformat (2, args); |
5f5c8ee5 GM |
6174 | |
6175 | if (log) | |
d5db4077 | 6176 | message3 (message, SBYTES (message), STRING_MULTIBYTE (message)); |
5f5c8ee5 | 6177 | else |
d5db4077 | 6178 | message3_nolog (message, SBYTES (message), STRING_MULTIBYTE (message)); |
eb484132 GM |
6179 | |
6180 | UNGCPRO; | |
5f5c8ee5 GM |
6181 | |
6182 | /* Print should start at the beginning of the message | |
6183 | buffer next time. */ | |
6184 | message_buf_print = 0; | |
6185 | } | |
6186 | } | |
6187 | } | |
6188 | ||
6189 | ||
5f5c8ee5 GM |
6190 | /* Dump an informative message to the minibuf. If M is 0, clear out |
6191 | any existing message, and let the mini-buffer text show through. */ | |
6192 | ||
6193 | /* VARARGS 1 */ | |
6194 | void | |
6195 | message (m, a1, a2, a3) | |
6196 | char *m; | |
6197 | EMACS_INT a1, a2, a3; | |
6198 | { | |
6199 | if (noninteractive) | |
6200 | { | |
6201 | if (m) | |
6202 | { | |
6203 | if (noninteractive_need_newline) | |
6204 | putc ('\n', stderr); | |
6205 | noninteractive_need_newline = 0; | |
6206 | fprintf (stderr, m, a1, a2, a3); | |
6207 | if (cursor_in_echo_area == 0) | |
6208 | fprintf (stderr, "\n"); | |
6209 | fflush (stderr); | |
6210 | } | |
6211 | } | |
6212 | else if (INTERACTIVE) | |
6213 | { | |
6214 | /* The frame whose mini-buffer we're going to display the message | |
6215 | on. It may be larger than the selected frame, so we need to | |
6216 | use its buffer, not the selected frame's buffer. */ | |
6217 | Lisp_Object mini_window; | |
886bd6f2 | 6218 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6219 | |
6220 | /* Get the frame containing the mini-buffer | |
6221 | that the selected frame is using. */ | |
886bd6f2 | 6222 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6223 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6224 | ||
6225 | /* A null message buffer means that the frame hasn't really been | |
6226 | initialized yet. Error messages get reported properly by | |
6227 | cmd_error, so this must be just an informative message; toss | |
6228 | it. */ | |
6229 | if (FRAME_MESSAGE_BUF (f)) | |
6230 | { | |
6231 | if (m) | |
6232 | { | |
6233 | int len; | |
6234 | #ifdef NO_ARG_ARRAY | |
6235 | char *a[3]; | |
6236 | a[0] = (char *) a1; | |
6237 | a[1] = (char *) a2; | |
6238 | a[2] = (char *) a3; | |
6239 | ||
6240 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6241 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6242 | #else | |
6243 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6244 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
6245 | (char **) &a1); | |
6246 | #endif /* NO_ARG_ARRAY */ | |
6247 | ||
6248 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
6249 | } | |
6250 | else | |
6251 | message1 (0); | |
6252 | ||
6253 | /* Print should start at the beginning of the message | |
6254 | buffer next time. */ | |
6255 | message_buf_print = 0; | |
6256 | } | |
6257 | } | |
6258 | } | |
6259 | ||
6260 | ||
6261 | /* The non-logging version of message. */ | |
6262 | ||
6263 | void | |
6264 | message_nolog (m, a1, a2, a3) | |
6265 | char *m; | |
6266 | EMACS_INT a1, a2, a3; | |
6267 | { | |
6268 | Lisp_Object old_log_max; | |
6269 | old_log_max = Vmessage_log_max; | |
6270 | Vmessage_log_max = Qnil; | |
6271 | message (m, a1, a2, a3); | |
6272 | Vmessage_log_max = old_log_max; | |
6273 | } | |
6274 | ||
6275 | ||
c6e89d6c GM |
6276 | /* Display the current message in the current mini-buffer. This is |
6277 | only called from error handlers in process.c, and is not time | |
6278 | critical. */ | |
5f5c8ee5 GM |
6279 | |
6280 | void | |
6281 | update_echo_area () | |
6282 | { | |
c6e89d6c GM |
6283 | if (!NILP (echo_area_buffer[0])) |
6284 | { | |
6285 | Lisp_Object string; | |
6286 | string = Fcurrent_message (); | |
2311178e | 6287 | message3 (string, SBYTES (string), |
c6e89d6c GM |
6288 | !NILP (current_buffer->enable_multibyte_characters)); |
6289 | } | |
6290 | } | |
6291 | ||
6292 | ||
a67e162b RS |
6293 | /* Make sure echo area buffers in `echo_buffers' are live. |
6294 | If they aren't, make new ones. */ | |
5bcfeb49 GM |
6295 | |
6296 | static void | |
6297 | ensure_echo_area_buffers () | |
6298 | { | |
6299 | int i; | |
6300 | ||
6301 | for (i = 0; i < 2; ++i) | |
6302 | if (!BUFFERP (echo_buffer[i]) | |
6303 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
6304 | { | |
6305 | char name[30]; | |
ff3d9573 GM |
6306 | Lisp_Object old_buffer; |
6307 | int j; | |
6308 | ||
6309 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
6310 | sprintf (name, " *Echo Area %d*", i); |
6311 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 6312 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
6313 | |
6314 | for (j = 0; j < 2; ++j) | |
6315 | if (EQ (old_buffer, echo_area_buffer[j])) | |
6316 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
6317 | } |
6318 | } | |
6319 | ||
6320 | ||
23a96c77 | 6321 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
6322 | echo_area_buffer as current buffer. |
6323 | ||
6324 | WHICH zero means use the current message buffer | |
6325 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
6326 | from echo_buffer[] and clear it. | |
6327 | ||
6328 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
6329 | suitable buffer from echo_buffer[] and clear it. | |
6330 | ||
6331 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
6332 | that the current message becomes the last displayed one, make | |
6333 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
6334 | ||
4b41cebb | 6335 | Value is what FN returns. */ |
c6e89d6c GM |
6336 | |
6337 | static int | |
23a96c77 | 6338 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
6339 | struct window *w; |
6340 | int which; | |
23dd2d97 KR |
6341 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
6342 | EMACS_INT a1; | |
6343 | Lisp_Object a2; | |
6344 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6345 | { |
6346 | Lisp_Object buffer; | |
15e26c76 | 6347 | int this_one, the_other, clear_buffer_p, rc; |
331379bf | 6348 | int count = SPECPDL_INDEX (); |
c6e89d6c | 6349 | |
9583b2bb | 6350 | /* If buffers aren't live, make new ones. */ |
5bcfeb49 | 6351 | ensure_echo_area_buffers (); |
c6e89d6c GM |
6352 | |
6353 | clear_buffer_p = 0; | |
2311178e | 6354 | |
c6e89d6c GM |
6355 | if (which == 0) |
6356 | this_one = 0, the_other = 1; | |
6357 | else if (which > 0) | |
6358 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 6359 | else |
c6e89d6c GM |
6360 | { |
6361 | this_one = 0, the_other = 1; | |
6362 | clear_buffer_p = 1; | |
2311178e | 6363 | |
c6e89d6c GM |
6364 | /* We need a fresh one in case the current echo buffer equals |
6365 | the one containing the last displayed echo area message. */ | |
6366 | if (!NILP (echo_area_buffer[this_one]) | |
6367 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
6368 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
6369 | } |
6370 | ||
6371 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
6372 | have one. */ | |
6373 | if (NILP (echo_area_buffer[this_one])) | |
6374 | { | |
6375 | echo_area_buffer[this_one] | |
6376 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
6377 | ? echo_buffer[the_other] | |
6378 | : echo_buffer[this_one]); | |
6379 | clear_buffer_p = 1; | |
6380 | } | |
6381 | ||
6382 | buffer = echo_area_buffer[this_one]; | |
6383 | ||
1013f4e3 GM |
6384 | /* Don't get confused by reusing the buffer used for echoing |
6385 | for a different purpose. */ | |
032906b1 | 6386 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
6387 | cancel_echoing (); |
6388 | ||
c6e89d6c GM |
6389 | record_unwind_protect (unwind_with_echo_area_buffer, |
6390 | with_echo_area_buffer_unwind_data (w)); | |
6391 | ||
6392 | /* Make the echo area buffer current. Note that for display | |
6393 | purposes, it is not necessary that the displayed window's buffer | |
6394 | == current_buffer, except for text property lookup. So, let's | |
6395 | only set that buffer temporarily here without doing a full | |
6396 | Fset_window_buffer. We must also change w->pointm, though, | |
6397 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
6398 | aborts. */ | |
9142dd5b | 6399 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
6400 | if (w) |
6401 | { | |
6402 | w->buffer = buffer; | |
6403 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
6404 | } | |
ad4f174e | 6405 | |
c6e89d6c GM |
6406 | current_buffer->undo_list = Qt; |
6407 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 6408 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 6409 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
6410 | |
6411 | if (clear_buffer_p && Z > BEG) | |
6412 | del_range (BEG, Z); | |
6413 | ||
6414 | xassert (BEGV >= BEG); | |
6415 | xassert (ZV <= Z && ZV >= BEGV); | |
6416 | ||
23a96c77 | 6417 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
6418 | |
6419 | xassert (BEGV >= BEG); | |
6420 | xassert (ZV <= Z && ZV >= BEGV); | |
6421 | ||
6422 | unbind_to (count, Qnil); | |
6423 | return rc; | |
5f5c8ee5 GM |
6424 | } |
6425 | ||
6426 | ||
c6e89d6c GM |
6427 | /* Save state that should be preserved around the call to the function |
6428 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 6429 | |
c6e89d6c GM |
6430 | static Lisp_Object |
6431 | with_echo_area_buffer_unwind_data (w) | |
6432 | struct window *w; | |
5f5c8ee5 | 6433 | { |
c6e89d6c GM |
6434 | int i = 0; |
6435 | Lisp_Object vector; | |
5f5c8ee5 | 6436 | |
c6e89d6c GM |
6437 | /* Reduce consing by keeping one vector in |
6438 | Vwith_echo_area_save_vector. */ | |
6439 | vector = Vwith_echo_area_save_vector; | |
6440 | Vwith_echo_area_save_vector = Qnil; | |
2311178e | 6441 | |
c6e89d6c | 6442 | if (NILP (vector)) |
9142dd5b | 6443 | vector = Fmake_vector (make_number (7), Qnil); |
2311178e | 6444 | |
a61b7058 GM |
6445 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
6446 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
6447 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
2311178e | 6448 | |
c6e89d6c GM |
6449 | if (w) |
6450 | { | |
a61b7058 GM |
6451 | XSETWINDOW (AREF (vector, i), w); ++i; |
6452 | AREF (vector, i) = w->buffer; ++i; | |
6453 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
6454 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
6455 | } |
6456 | else | |
6457 | { | |
6458 | int end = i + 4; | |
a61b7058 GM |
6459 | for (; i < end; ++i) |
6460 | AREF (vector, i) = Qnil; | |
c6e89d6c | 6461 | } |
5f5c8ee5 | 6462 | |
a61b7058 | 6463 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
6464 | return vector; |
6465 | } | |
5f5c8ee5 | 6466 | |
5f5c8ee5 | 6467 | |
c6e89d6c GM |
6468 | /* Restore global state from VECTOR which was created by |
6469 | with_echo_area_buffer_unwind_data. */ | |
6470 | ||
6471 | static Lisp_Object | |
6472 | unwind_with_echo_area_buffer (vector) | |
6473 | Lisp_Object vector; | |
6474 | { | |
bbbf6d06 GM |
6475 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
6476 | Vdeactivate_mark = AREF (vector, 1); | |
6477 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 6478 | |
bbbf6d06 | 6479 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
6480 | { |
6481 | struct window *w; | |
6482 | Lisp_Object buffer, charpos, bytepos; | |
2311178e | 6483 | |
bbbf6d06 GM |
6484 | w = XWINDOW (AREF (vector, 3)); |
6485 | buffer = AREF (vector, 4); | |
6486 | charpos = AREF (vector, 5); | |
6487 | bytepos = AREF (vector, 6); | |
2311178e | 6488 | |
c6e89d6c GM |
6489 | w->buffer = buffer; |
6490 | set_marker_both (w->pointm, buffer, | |
6491 | XFASTINT (charpos), XFASTINT (bytepos)); | |
6492 | } | |
6493 | ||
6494 | Vwith_echo_area_save_vector = vector; | |
6495 | return Qnil; | |
6496 | } | |
6497 | ||
6498 | ||
6499 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
6500 | non-zero means we will print multibyte. */ | |
6501 | ||
6502 | void | |
6503 | setup_echo_area_for_printing (multibyte_p) | |
6504 | int multibyte_p; | |
6505 | { | |
03b0a4b4 RS |
6506 | /* If we can't find an echo area any more, exit. */ |
6507 | if (! FRAME_LIVE_P (XFRAME (selected_frame))) | |
6508 | Fkill_emacs (Qnil); | |
6509 | ||
5bcfeb49 GM |
6510 | ensure_echo_area_buffers (); |
6511 | ||
c6e89d6c GM |
6512 | if (!message_buf_print) |
6513 | { | |
6514 | /* A message has been output since the last time we printed. | |
6515 | Choose a fresh echo area buffer. */ | |
6516 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 6517 | echo_area_buffer[0] = echo_buffer[1]; |
c6e89d6c GM |
6518 | else |
6519 | echo_area_buffer[0] = echo_buffer[0]; | |
6520 | ||
6521 | /* Switch to that buffer and clear it. */ | |
6522 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 6523 | current_buffer->truncate_lines = Qnil; |
2311178e | 6524 | |
c6e89d6c | 6525 | if (Z > BEG) |
bbbf6d06 | 6526 | { |
331379bf | 6527 | int count = SPECPDL_INDEX (); |
bbbf6d06 | 6528 | specbind (Qinhibit_read_only, Qt); |
a67e162b | 6529 | /* Note that undo recording is always disabled. */ |
bbbf6d06 GM |
6530 | del_range (BEG, Z); |
6531 | unbind_to (count, Qnil); | |
6532 | } | |
c6e89d6c GM |
6533 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6534 | ||
6535 | /* Set up the buffer for the multibyteness we need. */ | |
6536 | if (multibyte_p | |
6537 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6538 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
6539 | ||
6540 | /* Raise the frame containing the echo area. */ | |
6541 | if (minibuffer_auto_raise) | |
6542 | { | |
886bd6f2 | 6543 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6544 | Lisp_Object mini_window; |
886bd6f2 | 6545 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6546 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
6547 | } | |
6548 | ||
8a4e3c0c | 6549 | message_log_maybe_newline (); |
c6e89d6c GM |
6550 | message_buf_print = 1; |
6551 | } | |
fa77249f GM |
6552 | else |
6553 | { | |
6554 | if (NILP (echo_area_buffer[0])) | |
6555 | { | |
6556 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 6557 | echo_area_buffer[0] = echo_buffer[1]; |
fa77249f GM |
6558 | else |
6559 | echo_area_buffer[0] = echo_buffer[0]; | |
6560 | } | |
2311178e | 6561 | |
fa77249f | 6562 | if (current_buffer != XBUFFER (echo_area_buffer[0])) |
ab2c5f0a GM |
6563 | { |
6564 | /* Someone switched buffers between print requests. */ | |
6565 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
6566 | current_buffer->truncate_lines = Qnil; | |
6567 | } | |
fa77249f | 6568 | } |
c6e89d6c GM |
6569 | } |
6570 | ||
6571 | ||
dd2eb166 GM |
6572 | /* Display an echo area message in window W. Value is non-zero if W's |
6573 | height is changed. If display_last_displayed_message_p is | |
6574 | non-zero, display the message that was last displayed, otherwise | |
6575 | display the current message. */ | |
c6e89d6c GM |
6576 | |
6577 | static int | |
6578 | display_echo_area (w) | |
6579 | struct window *w; | |
6580 | { | |
25edb08f GM |
6581 | int i, no_message_p, window_height_changed_p, count; |
6582 | ||
6583 | /* Temporarily disable garbage collections while displaying the echo | |
6584 | area. This is done because a GC can print a message itself. | |
6585 | That message would modify the echo area buffer's contents while a | |
6586 | redisplay of the buffer is going on, and seriously confuse | |
6587 | redisplay. */ | |
6588 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
6589 | |
6590 | /* If there is no message, we must call display_echo_area_1 | |
6591 | nevertheless because it resizes the window. But we will have to | |
6592 | reset the echo_area_buffer in question to nil at the end because | |
6593 | with_echo_area_buffer will sets it to an empty buffer. */ | |
6594 | i = display_last_displayed_message_p ? 1 : 0; | |
6595 | no_message_p = NILP (echo_area_buffer[i]); | |
2311178e | 6596 | |
dd2eb166 GM |
6597 | window_height_changed_p |
6598 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 6599 | display_echo_area_1, |
23dd2d97 | 6600 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
6601 | |
6602 | if (no_message_p) | |
6603 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
6604 | |
6605 | unbind_to (count, Qnil); | |
dd2eb166 | 6606 | return window_height_changed_p; |
c6e89d6c GM |
6607 | } |
6608 | ||
6609 | ||
6610 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
6611 | contains the current echo area message in window W, a mini-window, |
6612 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
6613 | Change the height of W so that all of the message is displayed. |
6614 | Value is non-zero if height of W was changed. */ | |
6615 | ||
6616 | static int | |
23a96c77 | 6617 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6618 | EMACS_INT a1; |
6619 | Lisp_Object a2; | |
6620 | EMACS_INT a3, a4; | |
c6e89d6c | 6621 | { |
23a96c77 | 6622 | struct window *w = (struct window *) a1; |
c6e89d6c | 6623 | Lisp_Object window; |
c6e89d6c GM |
6624 | struct text_pos start; |
6625 | int window_height_changed_p = 0; | |
6626 | ||
6627 | /* Do this before displaying, so that we have a large enough glyph | |
6628 | matrix for the display. */ | |
92a90e89 | 6629 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
6630 | |
6631 | /* Display. */ | |
6632 | clear_glyph_matrix (w->desired_matrix); | |
6633 | XSETWINDOW (window, w); | |
6634 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
6635 | try_window (window, start); | |
6636 | ||
c6e89d6c GM |
6637 | return window_height_changed_p; |
6638 | } | |
6639 | ||
6640 | ||
92a90e89 | 6641 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
6642 | currently displayed message, if there is one. If a mini-buffer |
6643 | is active, don't shrink it. */ | |
92a90e89 GM |
6644 | |
6645 | void | |
308a74d8 | 6646 | resize_echo_area_exactly () |
92a90e89 GM |
6647 | { |
6648 | if (BUFFERP (echo_area_buffer[0]) | |
6649 | && WINDOWP (echo_area_window)) | |
6650 | { | |
6651 | struct window *w = XWINDOW (echo_area_window); | |
6652 | int resized_p; | |
6d004fea GM |
6653 | Lisp_Object resize_exactly; |
6654 | ||
6655 | if (minibuf_level == 0) | |
6656 | resize_exactly = Qt; | |
6657 | else | |
6658 | resize_exactly = Qnil; | |
2311178e | 6659 | |
23a96c77 | 6660 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 6661 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
6662 | if (resized_p) |
6663 | { | |
6664 | ++windows_or_buffers_changed; | |
6665 | ++update_mode_lines; | |
6666 | redisplay_internal (0); | |
6667 | } | |
6668 | } | |
6669 | } | |
6670 | ||
6671 | ||
23a96c77 | 6672 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 6673 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
6674 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
6675 | size of the text displayed. A3 and A4 are not used. Value is what | |
6676 | resize_mini_window returns. */ | |
23a96c77 GM |
6677 | |
6678 | static int | |
6d004fea | 6679 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 6680 | EMACS_INT a1; |
6d004fea | 6681 | Lisp_Object exactly; |
23dd2d97 | 6682 | EMACS_INT a3, a4; |
23a96c77 | 6683 | { |
6d004fea | 6684 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
6685 | } |
6686 | ||
6687 | ||
92a90e89 GM |
6688 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
6689 | means size the window exactly to the size needed. Otherwise, it's | |
6690 | only enlarged until W's buffer is empty. Value is non-zero if | |
4b41cebb | 6691 | the window height has been changed. */ |
c6e89d6c | 6692 | |
9472f927 | 6693 | int |
92a90e89 | 6694 | resize_mini_window (w, exact_p) |
c6e89d6c | 6695 | struct window *w; |
92a90e89 | 6696 | int exact_p; |
c6e89d6c GM |
6697 | { |
6698 | struct frame *f = XFRAME (w->frame); | |
6699 | int window_height_changed_p = 0; | |
6700 | ||
6701 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 6702 | |
2913a9c0 GM |
6703 | /* Don't resize windows while redisplaying a window; it would |
6704 | confuse redisplay functions when the size of the window they are | |
6705 | displaying changes from under them. Such a resizing can happen, | |
6706 | for instance, when which-func prints a long message while | |
6707 | we are running fontification-functions. We're running these | |
6708 | functions with safe_call which binds inhibit-redisplay to t. */ | |
6709 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 | 6710 | return 0; |
2311178e | 6711 | |
97cafc0f | 6712 | /* Nil means don't try to resize. */ |
6422c1d7 | 6713 | if (NILP (Vresize_mini_windows) |
00f6d59e | 6714 | || (FRAME_X_P (f) && f->output_data.x == NULL)) |
97cafc0f | 6715 | return 0; |
2311178e | 6716 | |
c6e89d6c GM |
6717 | if (!FRAME_MINIBUF_ONLY_P (f)) |
6718 | { | |
6719 | struct it it; | |
dd2eb166 GM |
6720 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
6721 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
6722 | int height, max_height; | |
6723 | int unit = CANON_Y_UNIT (f); | |
6724 | struct text_pos start; | |
1bfdbe43 GM |
6725 | struct buffer *old_current_buffer = NULL; |
6726 | ||
6727 | if (current_buffer != XBUFFER (w->buffer)) | |
6728 | { | |
6729 | old_current_buffer = current_buffer; | |
6730 | set_buffer_internal (XBUFFER (w->buffer)); | |
6731 | } | |
9142dd5b | 6732 | |
c6e89d6c | 6733 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 6734 | |
dd2eb166 GM |
6735 | /* Compute the max. number of lines specified by the user. */ |
6736 | if (FLOATP (Vmax_mini_window_height)) | |
18f9986a | 6737 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_HEIGHT (f); |
dd2eb166 GM |
6738 | else if (INTEGERP (Vmax_mini_window_height)) |
6739 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
6740 | else |
6741 | max_height = total_height / 4; | |
2311178e | 6742 | |
4b41cebb | 6743 | /* Correct that max. height if it's bogus. */ |
dd2eb166 GM |
6744 | max_height = max (1, max_height); |
6745 | max_height = min (total_height, max_height); | |
2311178e | 6746 | |
dd2eb166 | 6747 | /* Find out the height of the text in the window. */ |
ad4f174e GM |
6748 | if (it.truncate_lines_p) |
6749 | height = 1; | |
55b064bd | 6750 | else |
ad4f174e GM |
6751 | { |
6752 | last_height = 0; | |
6753 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
6754 | if (it.max_ascent == 0 && it.max_descent == 0) | |
6755 | height = it.current_y + last_height; | |
6756 | else | |
6757 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 6758 | height -= it.extra_line_spacing; |
ad4f174e GM |
6759 | height = (height + unit - 1) / unit; |
6760 | } | |
2311178e | 6761 | |
dd2eb166 GM |
6762 | /* Compute a suitable window start. */ |
6763 | if (height > max_height) | |
6764 | { | |
6765 | height = max_height; | |
6766 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
6767 | move_it_vertically_backward (&it, (height - 1) * unit); | |
6768 | start = it.current.pos; | |
6769 | } | |
6770 | else | |
6771 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
6772 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 6773 | |
6422c1d7 | 6774 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 6775 | { |
6422c1d7 GM |
6776 | /* Let it grow only, until we display an empty message, in which |
6777 | case the window shrinks again. */ | |
6778 | if (height > XFASTINT (w->height)) | |
6779 | { | |
6780 | int old_height = XFASTINT (w->height); | |
6781 | freeze_window_starts (f, 1); | |
6782 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6783 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6784 | } | |
6785 | else if (height < XFASTINT (w->height) | |
6786 | && (exact_p || BEGV == ZV)) | |
6787 | { | |
6788 | int old_height = XFASTINT (w->height); | |
6789 | freeze_window_starts (f, 0); | |
6790 | shrink_mini_window (w); | |
6791 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6792 | } | |
da448723 | 6793 | } |
2311178e | 6794 | else |
da448723 | 6795 | { |
6422c1d7 GM |
6796 | /* Always resize to exact size needed. */ |
6797 | if (height > XFASTINT (w->height)) | |
6798 | { | |
6799 | int old_height = XFASTINT (w->height); | |
6800 | freeze_window_starts (f, 1); | |
6801 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6802 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6803 | } | |
6804 | else if (height < XFASTINT (w->height)) | |
6805 | { | |
6806 | int old_height = XFASTINT (w->height); | |
6807 | freeze_window_starts (f, 0); | |
6808 | shrink_mini_window (w); | |
6809 | ||
6810 | if (height) | |
6811 | { | |
6812 | freeze_window_starts (f, 1); | |
6813 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6814 | } | |
2311178e | 6815 | |
6422c1d7 GM |
6816 | window_height_changed_p = XFASTINT (w->height) != old_height; |
6817 | } | |
9142dd5b | 6818 | } |
1bfdbe43 GM |
6819 | |
6820 | if (old_current_buffer) | |
6821 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
6822 | } |
6823 | ||
6824 | return window_height_changed_p; | |
6825 | } | |
6826 | ||
6827 | ||
6828 | /* Value is the current message, a string, or nil if there is no | |
6829 | current message. */ | |
6830 | ||
6831 | Lisp_Object | |
6832 | current_message () | |
6833 | { | |
6834 | Lisp_Object msg; | |
6835 | ||
6836 | if (NILP (echo_area_buffer[0])) | |
6837 | msg = Qnil; | |
6838 | else | |
6839 | { | |
23a96c77 | 6840 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 6841 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
6842 | if (NILP (msg)) |
6843 | echo_area_buffer[0] = Qnil; | |
6844 | } | |
2311178e | 6845 | |
c6e89d6c GM |
6846 | return msg; |
6847 | } | |
6848 | ||
6849 | ||
6850 | static int | |
23a96c77 | 6851 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6852 | EMACS_INT a1; |
6853 | Lisp_Object a2; | |
6854 | EMACS_INT a3, a4; | |
c6e89d6c | 6855 | { |
23a96c77 | 6856 | Lisp_Object *msg = (Lisp_Object *) a1; |
2311178e | 6857 | |
c6e89d6c GM |
6858 | if (Z > BEG) |
6859 | *msg = make_buffer_string (BEG, Z, 1); | |
6860 | else | |
6861 | *msg = Qnil; | |
6862 | return 0; | |
6863 | } | |
6864 | ||
6865 | ||
6866 | /* Push the current message on Vmessage_stack for later restauration | |
6867 | by restore_message. Value is non-zero if the current message isn't | |
6868 | empty. This is a relatively infrequent operation, so it's not | |
6869 | worth optimizing. */ | |
6870 | ||
6871 | int | |
6872 | push_message () | |
6873 | { | |
6874 | Lisp_Object msg; | |
6875 | msg = current_message (); | |
6876 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
6877 | return STRINGP (msg); | |
6878 | } | |
6879 | ||
6880 | ||
6881 | /* Restore message display from the top of Vmessage_stack. */ | |
6882 | ||
6883 | void | |
6884 | restore_message () | |
6885 | { | |
6886 | Lisp_Object msg; | |
2311178e | 6887 | |
c6e89d6c GM |
6888 | xassert (CONSP (Vmessage_stack)); |
6889 | msg = XCAR (Vmessage_stack); | |
6890 | if (STRINGP (msg)) | |
d5db4077 | 6891 | message3_nolog (msg, SBYTES (msg), STRING_MULTIBYTE (msg)); |
c6e89d6c GM |
6892 | else |
6893 | message3_nolog (msg, 0, 0); | |
6894 | } | |
6895 | ||
6896 | ||
37d66095 RS |
6897 | /* Handler for record_unwind_protect calling pop_message. */ |
6898 | ||
6899 | Lisp_Object | |
6900 | pop_message_unwind (dummy) | |
6901 | Lisp_Object dummy; | |
6902 | { | |
6903 | pop_message (); | |
6904 | return Qnil; | |
6905 | } | |
6906 | ||
c6e89d6c GM |
6907 | /* Pop the top-most entry off Vmessage_stack. */ |
6908 | ||
6909 | void | |
6910 | pop_message () | |
6911 | { | |
6912 | xassert (CONSP (Vmessage_stack)); | |
6913 | Vmessage_stack = XCDR (Vmessage_stack); | |
6914 | } | |
6915 | ||
6916 | ||
6917 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
6918 | exits. If the stack is not empty, we have a missing pop_message | |
6919 | somewhere. */ | |
6920 | ||
6921 | void | |
6922 | check_message_stack () | |
6923 | { | |
6924 | if (!NILP (Vmessage_stack)) | |
6925 | abort (); | |
6926 | } | |
6927 | ||
6928 | ||
6929 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
6930 | time we display it---but don't redisplay it now. */ | |
6931 | ||
6932 | void | |
6933 | truncate_echo_area (nchars) | |
6934 | int nchars; | |
6935 | { | |
6936 | if (nchars == 0) | |
6937 | echo_area_buffer[0] = Qnil; | |
6938 | /* A null message buffer means that the frame hasn't really been | |
6939 | initialized yet. Error messages get reported properly by | |
6940 | cmd_error, so this must be just an informative message; toss it. */ | |
6941 | else if (!noninteractive | |
6942 | && INTERACTIVE | |
c6e89d6c | 6943 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
6944 | { |
6945 | struct frame *sf = SELECTED_FRAME (); | |
6946 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 6947 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 6948 | } |
c6e89d6c GM |
6949 | } |
6950 | ||
6951 | ||
6952 | /* Helper function for truncate_echo_area. Truncate the current | |
6953 | message to at most NCHARS characters. */ | |
6954 | ||
6955 | static int | |
23a96c77 | 6956 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
6957 | EMACS_INT nchars; |
6958 | Lisp_Object a2; | |
6959 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6960 | { |
6961 | if (BEG + nchars < Z) | |
6962 | del_range (BEG + nchars, Z); | |
6963 | if (Z == BEG) | |
6964 | echo_area_buffer[0] = Qnil; | |
6965 | return 0; | |
6966 | } | |
6967 | ||
6968 | ||
6969 | /* Set the current message to a substring of S or STRING. | |
6970 | ||
6971 | If STRING is a Lisp string, set the message to the first NBYTES | |
6972 | bytes from STRING. NBYTES zero means use the whole string. If | |
6973 | STRING is multibyte, the message will be displayed multibyte. | |
6974 | ||
6975 | If S is not null, set the message to the first LEN bytes of S. LEN | |
6976 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
6977 | multibyte. Display the message multibyte in that case. */ | |
6978 | ||
6979 | void | |
6980 | set_message (s, string, nbytes, multibyte_p) | |
50f80c2f | 6981 | const char *s; |
c6e89d6c | 6982 | Lisp_Object string; |
e3383b6f | 6983 | int nbytes, multibyte_p; |
c6e89d6c GM |
6984 | { |
6985 | message_enable_multibyte | |
6986 | = ((s && multibyte_p) | |
6987 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
2311178e | 6988 | |
23a96c77 GM |
6989 | with_echo_area_buffer (0, -1, set_message_1, |
6990 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c | 6991 | message_buf_print = 0; |
21fdfb65 | 6992 | help_echo_showing_p = 0; |
c6e89d6c GM |
6993 | } |
6994 | ||
6995 | ||
6996 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
6997 | as there, with A1 corresponding to S and A2 corresponding to STRING |
6998 | This function is called with the echo area buffer being | |
c6e89d6c GM |
6999 | current. */ |
7000 | ||
7001 | static int | |
23a96c77 | 7002 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
7003 | EMACS_INT a1; |
7004 | Lisp_Object a2; | |
7005 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 7006 | { |
50f80c2f | 7007 | const char *s = (const char *) a1; |
23dd2d97 | 7008 | Lisp_Object string = a2; |
2311178e | 7009 | |
c6e89d6c | 7010 | xassert (BEG == Z); |
2311178e | 7011 | |
c6e89d6c GM |
7012 | /* Change multibyteness of the echo buffer appropriately. */ |
7013 | if (message_enable_multibyte | |
7014 | != !NILP (current_buffer->enable_multibyte_characters)) | |
7015 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
7016 | ||
ad4f174e | 7017 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
2311178e | 7018 | |
c6e89d6c GM |
7019 | /* Insert new message at BEG. */ |
7020 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
7021 | ||
7022 | if (STRINGP (string)) | |
7023 | { | |
7024 | int nchars; | |
2311178e | 7025 | |
c6e89d6c | 7026 | if (nbytes == 0) |
2051c264 | 7027 | nbytes = SBYTES (string); |
c6e89d6c | 7028 | nchars = string_byte_to_char (string, nbytes); |
2311178e | 7029 | |
c6e89d6c GM |
7030 | /* This function takes care of single/multibyte conversion. We |
7031 | just have to ensure that the echo area buffer has the right | |
7032 | setting of enable_multibyte_characters. */ | |
7033 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
7034 | } | |
7035 | else if (s) | |
7036 | { | |
7037 | if (nbytes == 0) | |
7038 | nbytes = strlen (s); | |
2311178e | 7039 | |
c6e89d6c GM |
7040 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) |
7041 | { | |
7042 | /* Convert from multi-byte to single-byte. */ | |
7043 | int i, c, n; | |
7044 | unsigned char work[1]; | |
2311178e | 7045 | |
c6e89d6c GM |
7046 | /* Convert a multibyte string to single-byte. */ |
7047 | for (i = 0; i < nbytes; i += n) | |
7048 | { | |
7049 | c = string_char_and_length (s + i, nbytes - i, &n); | |
7050 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
7051 | ? c | |
7052 | : multibyte_char_to_unibyte (c, Qnil)); | |
7053 | insert_1_both (work, 1, 1, 1, 0, 0); | |
7054 | } | |
7055 | } | |
7056 | else if (!multibyte_p | |
7057 | && !NILP (current_buffer->enable_multibyte_characters)) | |
7058 | { | |
7059 | /* Convert from single-byte to multi-byte. */ | |
7060 | int i, c, n; | |
50f80c2f | 7061 | const unsigned char *msg = (const unsigned char *) s; |
260a86a0 | 7062 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2311178e | 7063 | |
c6e89d6c GM |
7064 | /* Convert a single-byte string to multibyte. */ |
7065 | for (i = 0; i < nbytes; i++) | |
7066 | { | |
7067 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
7068 | n = CHAR_STRING (c, str); |
7069 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
7070 | } |
7071 | } | |
7072 | else | |
7073 | insert_1 (s, nbytes, 1, 0, 0); | |
7074 | } | |
7075 | ||
7076 | return 0; | |
7077 | } | |
7078 | ||
7079 | ||
7080 | /* Clear messages. CURRENT_P non-zero means clear the current | |
7081 | message. LAST_DISPLAYED_P non-zero means clear the message | |
7082 | last displayed. */ | |
7083 | ||
7084 | void | |
7085 | clear_message (current_p, last_displayed_p) | |
7086 | int current_p, last_displayed_p; | |
7087 | { | |
7088 | if (current_p) | |
6e019995 GM |
7089 | { |
7090 | echo_area_buffer[0] = Qnil; | |
7091 | message_cleared_p = 1; | |
7092 | } | |
2311178e | 7093 | |
c6e89d6c GM |
7094 | if (last_displayed_p) |
7095 | echo_area_buffer[1] = Qnil; | |
2311178e | 7096 | |
c6e89d6c GM |
7097 | message_buf_print = 0; |
7098 | } | |
7099 | ||
7100 | /* Clear garbaged frames. | |
7101 | ||
7102 | This function is used where the old redisplay called | |
7103 | redraw_garbaged_frames which in turn called redraw_frame which in | |
7104 | turn called clear_frame. The call to clear_frame was a source of | |
7105 | flickering. I believe a clear_frame is not necessary. It should | |
7106 | suffice in the new redisplay to invalidate all current matrices, | |
7107 | and ensure a complete redisplay of all windows. */ | |
7108 | ||
7109 | static void | |
7110 | clear_garbaged_frames () | |
7111 | { | |
5f5c8ee5 GM |
7112 | if (frame_garbaged) |
7113 | { | |
5f5c8ee5 | 7114 | Lisp_Object tail, frame; |
5fb96e96 | 7115 | int changed_count = 0; |
2311178e | 7116 | |
5f5c8ee5 GM |
7117 | FOR_EACH_FRAME (tail, frame) |
7118 | { | |
7119 | struct frame *f = XFRAME (frame); | |
2311178e | 7120 | |
5f5c8ee5 GM |
7121 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) |
7122 | { | |
6bb95882 | 7123 | if (f->resized_p) |
573e57f1 | 7124 | Fredraw_frame (frame); |
5f5c8ee5 | 7125 | clear_current_matrices (f); |
5fb96e96 | 7126 | changed_count++; |
5f5c8ee5 | 7127 | f->garbaged = 0; |
6bb95882 | 7128 | f->resized_p = 0; |
5f5c8ee5 GM |
7129 | } |
7130 | } | |
7131 | ||
7132 | frame_garbaged = 0; | |
5fb96e96 RS |
7133 | if (changed_count) |
7134 | ++windows_or_buffers_changed; | |
5f5c8ee5 | 7135 | } |
c6e89d6c | 7136 | } |
5f5c8ee5 | 7137 | |
5f5c8ee5 | 7138 | |
886bd6f2 GM |
7139 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
7140 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 7141 | mini-windows height has been changed. */ |
5f5c8ee5 | 7142 | |
c6e89d6c GM |
7143 | static int |
7144 | echo_area_display (update_frame_p) | |
7145 | int update_frame_p; | |
7146 | { | |
7147 | Lisp_Object mini_window; | |
7148 | struct window *w; | |
7149 | struct frame *f; | |
7150 | int window_height_changed_p = 0; | |
886bd6f2 | 7151 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7152 | |
886bd6f2 | 7153 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7154 | w = XWINDOW (mini_window); |
7155 | f = XFRAME (WINDOW_FRAME (w)); | |
7156 | ||
7157 | /* Don't display if frame is invisible or not yet initialized. */ | |
7158 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
7159 | return 0; | |
5f5c8ee5 | 7160 | |
1a578e9b | 7161 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
e0f712ba | 7162 | #ifndef MAC_OS8 |
1ab3e082 | 7163 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
7164 | /* When Emacs starts, selected_frame may be a visible terminal |
7165 | frame, even if we run under a window system. If we let this | |
7166 | through, a message would be displayed on the terminal. */ | |
2311178e | 7167 | if (EQ (selected_frame, Vterminal_frame) |
622e3754 | 7168 | && !NILP (Vwindow_system)) |
c6e89d6c | 7169 | return 0; |
1ab3e082 | 7170 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 7171 | #endif |
c6e89d6c GM |
7172 | |
7173 | /* Redraw garbaged frames. */ | |
7174 | if (frame_garbaged) | |
7175 | clear_garbaged_frames (); | |
7176 | ||
7177 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
7178 | { | |
7179 | echo_area_window = mini_window; | |
7180 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 7181 | w->must_be_updated_p = 1; |
c59c668a | 7182 | |
d4358b37 GM |
7183 | /* Update the display, unless called from redisplay_internal. |
7184 | Also don't update the screen during redisplay itself. The | |
7185 | update will happen at the end of redisplay, and an update | |
7186 | here could cause confusion. */ | |
7187 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 7188 | { |
715e84c9 | 7189 | int n = 0; |
edc68111 | 7190 | |
715e84c9 GM |
7191 | /* If the display update has been interrupted by pending |
7192 | input, update mode lines in the frame. Due to the | |
7193 | pending input, it might have been that redisplay hasn't | |
7194 | been called, so that mode lines above the echo area are | |
7195 | garbaged. This looks odd, so we prevent it here. */ | |
7196 | if (!display_completed) | |
7197 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
2311178e | 7198 | |
8af1308e GM |
7199 | if (window_height_changed_p |
7200 | /* Don't do this if Emacs is shutting down. Redisplay | |
7201 | needs to run hooks. */ | |
7202 | && !NILP (Vrun_hooks)) | |
c59c668a | 7203 | { |
c06017fb GM |
7204 | /* Must update other windows. Likewise as in other |
7205 | cases, don't let this update be interrupted by | |
7206 | pending input. */ | |
331379bf | 7207 | int count = SPECPDL_INDEX (); |
c06017fb | 7208 | specbind (Qredisplay_dont_pause, Qt); |
edc68111 | 7209 | windows_or_buffers_changed = 1; |
c59c668a | 7210 | redisplay_internal (0); |
c06017fb | 7211 | unbind_to (count, Qnil); |
c59c668a | 7212 | } |
715e84c9 | 7213 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 7214 | { |
edc68111 | 7215 | /* Window configuration is the same as before. |
715e84c9 GM |
7216 | Can do with a display update of the echo area, |
7217 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
7218 | update_single_window (w, 1); |
7219 | rif->flush_display (f); | |
7220 | } | |
7221 | else | |
7222 | update_frame (f, 1, 1); | |
31b6671b GM |
7223 | |
7224 | /* If cursor is in the echo area, make sure that the next | |
7225 | redisplay displays the minibuffer, so that the cursor will | |
7226 | be replaced with what the minibuffer wants. */ | |
7227 | if (cursor_in_echo_area) | |
7228 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
7229 | } |
7230 | } | |
7231 | else if (!EQ (mini_window, selected_window)) | |
7232 | windows_or_buffers_changed++; | |
c59c668a GM |
7233 | |
7234 | /* Last displayed message is now the current message. */ | |
dd2eb166 | 7235 | echo_area_buffer[1] = echo_area_buffer[0]; |
2311178e | 7236 | |
5f5c8ee5 GM |
7237 | /* Prevent redisplay optimization in redisplay_internal by resetting |
7238 | this_line_start_pos. This is done because the mini-buffer now | |
7239 | displays the message instead of its buffer text. */ | |
7240 | if (EQ (mini_window, selected_window)) | |
7241 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
7242 | |
7243 | return window_height_changed_p; | |
5f5c8ee5 GM |
7244 | } |
7245 | ||
7246 | ||
7247 | \f | |
7248 | /*********************************************************************** | |
7249 | Frame Titles | |
7250 | ***********************************************************************/ | |
7251 | ||
7252 | ||
8143e6ab KS |
7253 | /* The frame title buffering code is also used by Fformat_mode_line. |
7254 | So it is not conditioned by HAVE_WINDOW_SYSTEM. */ | |
5f5c8ee5 GM |
7255 | |
7256 | /* A buffer for constructing frame titles in it; allocated from the | |
7257 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
7258 | ||
7259 | static char *frame_title_buf; | |
7260 | ||
7261 | /* The buffer's end, and a current output position in it. */ | |
7262 | ||
7263 | static char *frame_title_buf_end; | |
7264 | static char *frame_title_ptr; | |
7265 | ||
7266 | ||
7267 | /* Store a single character C for the frame title in frame_title_buf. | |
7268 | Re-allocate frame_title_buf if necessary. */ | |
7269 | ||
7270 | static void | |
5d15cc8f DL |
7271 | #ifdef PROTOTYPES |
7272 | store_frame_title_char (char c) | |
7273 | #else | |
5f5c8ee5 GM |
7274 | store_frame_title_char (c) |
7275 | char c; | |
5d15cc8f | 7276 | #endif |
5f5c8ee5 GM |
7277 | { |
7278 | /* If output position has reached the end of the allocated buffer, | |
7279 | double the buffer's size. */ | |
7280 | if (frame_title_ptr == frame_title_buf_end) | |
7281 | { | |
7282 | int len = frame_title_ptr - frame_title_buf; | |
7283 | int new_size = 2 * len * sizeof *frame_title_buf; | |
7284 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
7285 | frame_title_buf_end = frame_title_buf + new_size; | |
7286 | frame_title_ptr = frame_title_buf + len; | |
7287 | } | |
7288 | ||
7289 | *frame_title_ptr++ = c; | |
7290 | } | |
7291 | ||
7292 | ||
7293 | /* Store part of a frame title in frame_title_buf, beginning at | |
d26b89b8 KH |
7294 | frame_title_ptr. STR is the string to store. Do not copy |
7295 | characters that yield more columns than PRECISION; PRECISION <= 0 | |
7296 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
7297 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
7298 | pad. Called from display_mode_element when it is used to build a | |
7299 | frame title. */ | |
5f5c8ee5 GM |
7300 | |
7301 | static int | |
7302 | store_frame_title (str, field_width, precision) | |
50f80c2f | 7303 | const unsigned char *str; |
5f5c8ee5 GM |
7304 | int field_width, precision; |
7305 | { | |
7306 | int n = 0; | |
3b552d56 | 7307 | int dummy, nbytes; |
5f5c8ee5 GM |
7308 | |
7309 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 KH |
7310 | nbytes = strlen (str); |
7311 | n+= c_string_width (str, nbytes, precision, &dummy, &nbytes); | |
7312 | while (nbytes--) | |
7313 | store_frame_title_char (*str++); | |
5f5c8ee5 GM |
7314 | |
7315 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
7316 | while (field_width > 0 | |
7317 | && n < field_width) | |
7318 | { | |
7319 | store_frame_title_char (' '); | |
7320 | ++n; | |
7321 | } | |
7322 | ||
7323 | return n; | |
7324 | } | |
7325 | ||
8143e6ab | 7326 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7327 | |
7328 | /* Set the title of FRAME, if it has changed. The title format is | |
7329 | Vicon_title_format if FRAME is iconified, otherwise it is | |
7330 | frame_title_format. */ | |
7331 | ||
7332 | static void | |
7333 | x_consider_frame_title (frame) | |
7334 | Lisp_Object frame; | |
7335 | { | |
7336 | struct frame *f = XFRAME (frame); | |
7337 | ||
7338 | if (FRAME_WINDOW_P (f) | |
7339 | || FRAME_MINIBUF_ONLY_P (f) | |
7340 | || f->explicit_name) | |
7341 | { | |
7342 | /* Do we have more than one visible frame on this X display? */ | |
7343 | Lisp_Object tail; | |
7344 | Lisp_Object fmt; | |
7345 | struct buffer *obuf; | |
7346 | int len; | |
7347 | struct it it; | |
7348 | ||
9472f927 | 7349 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 7350 | { |
74779f52 JR |
7351 | Lisp_Object other_frame = XCAR (tail); |
7352 | struct frame *tf = XFRAME (other_frame); | |
5f5c8ee5 | 7353 | |
2311178e | 7354 | if (tf != f |
5f5c8ee5 GM |
7355 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
7356 | && !FRAME_MINIBUF_ONLY_P (tf) | |
74779f52 | 7357 | && !EQ (other_frame, tip_frame) |
5f5c8ee5 GM |
7358 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
7359 | break; | |
7360 | } | |
7361 | ||
7362 | /* Set global variable indicating that multiple frames exist. */ | |
7363 | multiple_frames = CONSP (tail); | |
7364 | ||
7365 | /* Switch to the buffer of selected window of the frame. Set up | |
7366 | frame_title_ptr so that display_mode_element will output into it; | |
7367 | then display the title. */ | |
7368 | obuf = current_buffer; | |
bb336f8d | 7369 | set_buffer_internal_1 (XBUFFER (XWINDOW (f->selected_window)->buffer)); |
5f5c8ee5 GM |
7370 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; |
7371 | frame_title_ptr = frame_title_buf; | |
7372 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
7373 | NULL, DEFAULT_FACE_ID); | |
c53a1624 | 7374 | display_mode_element (&it, 0, -1, -1, fmt, Qnil, 0); |
d26b89b8 | 7375 | len = frame_title_ptr - frame_title_buf; |
5f5c8ee5 | 7376 | frame_title_ptr = NULL; |
bb336f8d | 7377 | set_buffer_internal_1 (obuf); |
5f5c8ee5 GM |
7378 | |
7379 | /* Set the title only if it's changed. This avoids consing in | |
7380 | the common case where it hasn't. (If it turns out that we've | |
7381 | already wasted too much time by walking through the list with | |
7382 | display_mode_element, then we might need to optimize at a | |
7383 | higher level than this.) */ | |
2311178e | 7384 | if (! STRINGP (f->name) |
2051c264 GM |
7385 | || SBYTES (f->name) != len |
7386 | || bcmp (frame_title_buf, SDATA (f->name), len) != 0) | |
5f5c8ee5 GM |
7387 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); |
7388 | } | |
7389 | } | |
7390 | ||
5f5c8ee5 GM |
7391 | #endif /* not HAVE_WINDOW_SYSTEM */ |
7392 | ||
7393 | ||
7394 | ||
7395 | \f | |
7396 | /*********************************************************************** | |
7397 | Menu Bars | |
7398 | ***********************************************************************/ | |
7399 | ||
7400 | ||
7401 | /* Prepare for redisplay by updating menu-bar item lists when | |
7402 | appropriate. This can call eval. */ | |
7403 | ||
7404 | void | |
7405 | prepare_menu_bars () | |
7406 | { | |
7407 | int all_windows; | |
7408 | struct gcpro gcpro1, gcpro2; | |
7409 | struct frame *f; | |
6b5c4794 | 7410 | Lisp_Object tooltip_frame; |
5f5c8ee5 | 7411 | |
86ffe5cd | 7412 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7413 | tooltip_frame = tip_frame; |
7414 | #else | |
6b5c4794 | 7415 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
7416 | #endif |
7417 | ||
7418 | /* Update all frame titles based on their buffer names, etc. We do | |
7419 | this before the menu bars so that the buffer-menu will show the | |
7420 | up-to-date frame titles. */ | |
7421 | #ifdef HAVE_WINDOW_SYSTEM | |
7422 | if (windows_or_buffers_changed || update_mode_lines) | |
7423 | { | |
7424 | Lisp_Object tail, frame; | |
7425 | ||
7426 | FOR_EACH_FRAME (tail, frame) | |
7427 | { | |
7428 | f = XFRAME (frame); | |
6b5c4794 | 7429 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
7430 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
7431 | x_consider_frame_title (frame); | |
7432 | } | |
7433 | } | |
7434 | #endif /* HAVE_WINDOW_SYSTEM */ | |
7435 | ||
7436 | /* Update the menu bar item lists, if appropriate. This has to be | |
7437 | done before any actual redisplay or generation of display lines. */ | |
2311178e | 7438 | all_windows = (update_mode_lines |
5f5c8ee5 GM |
7439 | || buffer_shared > 1 |
7440 | || windows_or_buffers_changed); | |
7441 | if (all_windows) | |
7442 | { | |
7443 | Lisp_Object tail, frame; | |
331379bf | 7444 | int count = SPECPDL_INDEX (); |
5f5c8ee5 GM |
7445 | |
7446 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7447 | ||
7448 | FOR_EACH_FRAME (tail, frame) | |
7449 | { | |
7450 | f = XFRAME (frame); | |
7451 | ||
7452 | /* Ignore tooltip frame. */ | |
6b5c4794 | 7453 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 | 7454 | continue; |
2311178e | 7455 | |
5f5c8ee5 GM |
7456 | /* If a window on this frame changed size, report that to |
7457 | the user and clear the size-change flag. */ | |
7458 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
7459 | { | |
7460 | Lisp_Object functions; | |
2311178e | 7461 | |
5f5c8ee5 GM |
7462 | /* Clear flag first in case we get an error below. */ |
7463 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
7464 | functions = Vwindow_size_change_functions; | |
7465 | GCPRO2 (tail, functions); | |
2311178e | 7466 | |
5f5c8ee5 GM |
7467 | while (CONSP (functions)) |
7468 | { | |
7469 | call1 (XCAR (functions), frame); | |
7470 | functions = XCDR (functions); | |
7471 | } | |
7472 | UNGCPRO; | |
7473 | } | |
2311178e | 7474 | |
5f5c8ee5 GM |
7475 | GCPRO1 (tail); |
7476 | update_menu_bar (f, 0); | |
7477 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 7478 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
7479 | #endif |
7480 | UNGCPRO; | |
7481 | } | |
7482 | ||
7483 | unbind_to (count, Qnil); | |
7484 | } | |
7485 | else | |
7486 | { | |
886bd6f2 GM |
7487 | struct frame *sf = SELECTED_FRAME (); |
7488 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 7489 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 7490 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
7491 | #endif |
7492 | } | |
7493 | ||
7494 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
7495 | pending_menu_activation is not defined. */ | |
7496 | #ifdef USE_X_TOOLKIT | |
7497 | pending_menu_activation = 0; | |
7498 | #endif | |
7499 | } | |
7500 | ||
7501 | ||
7502 | /* Update the menu bar item list for frame F. This has to be done | |
7503 | before we start to fill in any display lines, because it can call | |
7504 | eval. | |
7505 | ||
7506 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
7507 | ||
7508 | static void | |
7509 | update_menu_bar (f, save_match_data) | |
7510 | struct frame *f; | |
7511 | int save_match_data; | |
7512 | { | |
7513 | Lisp_Object window; | |
7514 | register struct window *w; | |
7515 | ||
e1477f43 GM |
7516 | /* If called recursively during a menu update, do nothing. This can |
7517 | happen when, for instance, an activate-menubar-hook causes a | |
7518 | redisplay. */ | |
7519 | if (inhibit_menubar_update) | |
7520 | return; | |
7521 | ||
5f5c8ee5 GM |
7522 | window = FRAME_SELECTED_WINDOW (f); |
7523 | w = XWINDOW (window); | |
2311178e | 7524 | |
40ae145b | 7525 | #if 0 /* The if statement below this if statement used to include the |
a5f08374 RS |
7526 | condition !NILP (w->update_mode_line), rather than using |
7527 | update_mode_lines directly, and this if statement may have | |
7528 | been added to make that condition work. Now the if | |
2311178e | 7529 | statement below matches its comment, this isn't needed. */ |
5f5c8ee5 GM |
7530 | if (update_mode_lines) |
7531 | w->update_mode_line = Qt; | |
a5f08374 | 7532 | #endif |
5f5c8ee5 GM |
7533 | |
7534 | if (FRAME_WINDOW_P (f) | |
7535 | ? | |
488dd4c4 JD |
7536 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
7537 | || defined (USE_GTK) | |
2311178e | 7538 | FRAME_EXTERNAL_MENU_BAR (f) |
5f5c8ee5 GM |
7539 | #else |
7540 | FRAME_MENU_BAR_LINES (f) > 0 | |
7541 | #endif | |
7542 | : FRAME_MENU_BAR_LINES (f) > 0) | |
7543 | { | |
7544 | /* If the user has switched buffers or windows, we need to | |
7545 | recompute to reflect the new bindings. But we'll | |
7546 | recompute when update_mode_lines is set too; that means | |
7547 | that people can use force-mode-line-update to request | |
7548 | that the menu bar be recomputed. The adverse effect on | |
7549 | the rest of the redisplay algorithm is about the same as | |
7550 | windows_or_buffers_changed anyway. */ | |
7551 | if (windows_or_buffers_changed | |
a5f08374 RS |
7552 | /* This used to test w->update_mode_line, but we believe |
7553 | there is no need to recompute the menu in that case. */ | |
7554 | || update_mode_lines | |
5f5c8ee5 GM |
7555 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
7556 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7557 | != !NILP (w->last_had_star)) | |
7558 | || ((!NILP (Vtransient_mark_mode) | |
7559 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7560 | != !NILP (w->region_showing))) | |
7561 | { | |
7562 | struct buffer *prev = current_buffer; | |
331379bf | 7563 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 7564 | |
e1477f43 GM |
7565 | specbind (Qinhibit_menubar_update, Qt); |
7566 | ||
5f5c8ee5 GM |
7567 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7568 | if (save_match_data) | |
7569 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7570 | if (NILP (Voverriding_local_map_menu_flag)) | |
7571 | { | |
7572 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7573 | specbind (Qoverriding_local_map, Qnil); | |
7574 | } | |
7575 | ||
7576 | /* Run the Lucid hook. */ | |
65048e97 | 7577 | safe_run_hooks (Qactivate_menubar_hook); |
2311178e | 7578 | |
5f5c8ee5 GM |
7579 | /* If it has changed current-menubar from previous value, |
7580 | really recompute the menu-bar from the value. */ | |
7581 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
7582 | call0 (Qrecompute_lucid_menubar); | |
2311178e | 7583 | |
5f5c8ee5 GM |
7584 | safe_run_hooks (Qmenu_bar_update_hook); |
7585 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
2311178e | 7586 | |
5f5c8ee5 | 7587 | /* Redisplay the menu bar in case we changed it. */ |
488dd4c4 JD |
7588 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
7589 | || defined (USE_GTK) | |
1a578e9b | 7590 | if (FRAME_WINDOW_P (f) |
e0f712ba | 7591 | #if defined (MAC_OS) |
1a578e9b AC |
7592 | /* All frames on Mac OS share the same menubar. So only the |
7593 | selected frame should be allowed to set it. */ | |
7594 | && f == SELECTED_FRAME () | |
7595 | #endif | |
7596 | ) | |
5f5c8ee5 GM |
7597 | set_frame_menubar (f, 0, 0); |
7598 | else | |
7599 | /* On a terminal screen, the menu bar is an ordinary screen | |
7600 | line, and this makes it get updated. */ | |
7601 | w->update_mode_line = Qt; | |
488dd4c4 | 7602 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
7603 | /* In the non-toolkit version, the menu bar is an ordinary screen |
7604 | line, and this makes it get updated. */ | |
7605 | w->update_mode_line = Qt; | |
488dd4c4 | 7606 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
7607 | |
7608 | unbind_to (count, Qnil); | |
7609 | set_buffer_internal_1 (prev); | |
7610 | } | |
7611 | } | |
7612 | } | |
7613 | ||
7614 | ||
7615 | \f | |
7616 | /*********************************************************************** | |
e037b9ec | 7617 | Tool-bars |
5f5c8ee5 GM |
7618 | ***********************************************************************/ |
7619 | ||
7620 | #ifdef HAVE_WINDOW_SYSTEM | |
7621 | ||
e037b9ec | 7622 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
7623 | before we start to fill in any display lines. Called from |
7624 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
7625 | and restore it here. */ | |
7626 | ||
7627 | static void | |
e037b9ec | 7628 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
7629 | struct frame *f; |
7630 | int save_match_data; | |
7631 | { | |
488dd4c4 JD |
7632 | #ifdef USE_GTK |
7633 | int do_update = FRAME_EXTERNAL_TOOL_BAR(f); | |
7634 | #else | |
7635 | int do_update = WINDOWP (f->tool_bar_window) | |
7636 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0; | |
7637 | #endif | |
7638 | ||
7639 | if (do_update) | |
5f5c8ee5 GM |
7640 | { |
7641 | Lisp_Object window; | |
7642 | struct window *w; | |
7643 | ||
7644 | window = FRAME_SELECTED_WINDOW (f); | |
7645 | w = XWINDOW (window); | |
2311178e | 7646 | |
5f5c8ee5 GM |
7647 | /* If the user has switched buffers or windows, we need to |
7648 | recompute to reflect the new bindings. But we'll | |
7649 | recompute when update_mode_lines is set too; that means | |
7650 | that people can use force-mode-line-update to request | |
7651 | that the menu bar be recomputed. The adverse effect on | |
7652 | the rest of the redisplay algorithm is about the same as | |
7653 | windows_or_buffers_changed anyway. */ | |
7654 | if (windows_or_buffers_changed | |
7655 | || !NILP (w->update_mode_line) | |
7656 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7657 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7658 | != !NILP (w->last_had_star)) | |
7659 | || ((!NILP (Vtransient_mark_mode) | |
7660 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7661 | != !NILP (w->region_showing))) | |
7662 | { | |
7663 | struct buffer *prev = current_buffer; | |
331379bf | 7664 | int count = SPECPDL_INDEX (); |
a2889657 | 7665 | |
5f5c8ee5 GM |
7666 | /* Set current_buffer to the buffer of the selected |
7667 | window of the frame, so that we get the right local | |
7668 | keymaps. */ | |
7669 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 7670 | |
5f5c8ee5 GM |
7671 | /* Save match data, if we must. */ |
7672 | if (save_match_data) | |
7673 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7674 | ||
7675 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
7676 | if (NILP (Voverriding_local_map_menu_flag)) | |
7677 | { | |
7678 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7679 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 7680 | } |
1f40cad2 | 7681 | |
e037b9ec | 7682 | /* Build desired tool-bar items from keymaps. */ |
7464726e GM |
7683 | f->tool_bar_items |
7684 | = tool_bar_items (f->tool_bar_items, &f->n_tool_bar_items); | |
2311178e | 7685 | |
e037b9ec | 7686 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
7687 | w->update_mode_line = Qt; |
7688 | ||
7689 | unbind_to (count, Qnil); | |
7690 | set_buffer_internal_1 (prev); | |
81d478f3 | 7691 | } |
a2889657 JB |
7692 | } |
7693 | } | |
7694 | ||
6c4429a5 | 7695 | |
e037b9ec | 7696 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 7697 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
7698 | been set up previously by calling prepare_menu_bars. */ |
7699 | ||
a2889657 | 7700 | static void |
e037b9ec | 7701 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 7702 | struct frame *f; |
a2889657 | 7703 | { |
a23887b9 | 7704 | int i, size, size_needed; |
5f5c8ee5 GM |
7705 | struct gcpro gcpro1, gcpro2, gcpro3; |
7706 | Lisp_Object image, plist, props; | |
a2889657 | 7707 | |
5f5c8ee5 GM |
7708 | image = plist = props = Qnil; |
7709 | GCPRO3 (image, plist, props); | |
a2889657 | 7710 | |
e037b9ec | 7711 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 | 7712 | Otherwise, make a new string. */ |
2311178e | 7713 | |
5f5c8ee5 | 7714 | /* The size of the string we might be able to reuse. */ |
e037b9ec | 7715 | size = (STRINGP (f->desired_tool_bar_string) |
2051c264 | 7716 | ? SCHARS (f->desired_tool_bar_string) |
5f5c8ee5 GM |
7717 | : 0); |
7718 | ||
b94c0d9c | 7719 | /* We need one space in the string for each image. */ |
a23887b9 | 7720 | size_needed = f->n_tool_bar_items; |
2311178e | 7721 | |
b94c0d9c | 7722 | /* Reuse f->desired_tool_bar_string, if possible. */ |
cb2ddc53 | 7723 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
7724 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
7725 | make_number (' ')); | |
5f5c8ee5 GM |
7726 | else |
7727 | { | |
7728 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
7729 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 7730 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7731 | } |
a2889657 | 7732 | |
5f5c8ee5 | 7733 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
7734 | put a `menu_item' property on tool-bar items with a value that |
7735 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 7736 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 7737 | { |
7464726e | 7738 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 7739 | |
e037b9ec GM |
7740 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
7741 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 7742 | int hmargin, vmargin, relief, idx, end; |
ecd01a0e | 7743 | extern Lisp_Object QCrelief, QCmargin, QCconversion, Qimage; |
5f5c8ee5 GM |
7744 | |
7745 | /* If image is a vector, choose the image according to the | |
7746 | button state. */ | |
e037b9ec | 7747 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
7748 | if (VECTORP (image)) |
7749 | { | |
5f5c8ee5 GM |
7750 | if (enabled_p) |
7751 | idx = (selected_p | |
e037b9ec GM |
7752 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
7753 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
7754 | else |
7755 | idx = (selected_p | |
e037b9ec GM |
7756 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
7757 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
2311178e | 7758 | |
37e4e482 GM |
7759 | xassert (ASIZE (image) >= idx); |
7760 | image = AREF (image, idx); | |
5f5c8ee5 | 7761 | } |
37e4e482 GM |
7762 | else |
7763 | idx = -1; | |
5f5c8ee5 GM |
7764 | |
7765 | /* Ignore invalid image specifications. */ | |
7766 | if (!valid_image_p (image)) | |
7767 | continue; | |
7768 | ||
e037b9ec | 7769 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
7770 | plist = Fcopy_sequence (XCDR (image)); |
7771 | ||
7772 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 7773 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
7774 | ? tool_bar_button_relief |
7775 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
7776 | hmargin = vmargin = relief; |
7777 | ||
7778 | if (INTEGERP (Vtool_bar_button_margin) | |
7779 | && XINT (Vtool_bar_button_margin) > 0) | |
7780 | { | |
7781 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
7782 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
7783 | } | |
7784 | else if (CONSP (Vtool_bar_button_margin)) | |
7785 | { | |
7786 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
7787 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
7788 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
2311178e | 7789 | |
35a41507 GM |
7790 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) |
7791 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
7792 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
7793 | } | |
2311178e | 7794 | |
e037b9ec | 7795 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
7796 | { |
7797 | /* Add a `:relief' property to the image spec if the item is | |
7798 | selected. */ | |
7799 | if (selected_p) | |
7800 | { | |
7801 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
7802 | hmargin -= relief; |
7803 | vmargin -= relief; | |
5f5c8ee5 GM |
7804 | } |
7805 | } | |
7806 | else | |
7807 | { | |
7808 | /* If image is selected, display it pressed, i.e. with a | |
7809 | negative relief. If it's not selected, display it with a | |
7810 | raised relief. */ | |
7811 | plist = Fplist_put (plist, QCrelief, | |
7812 | (selected_p | |
7813 | ? make_number (-relief) | |
7814 | : make_number (relief))); | |
35a41507 GM |
7815 | hmargin -= relief; |
7816 | vmargin -= relief; | |
5f5c8ee5 GM |
7817 | } |
7818 | ||
7819 | /* Put a margin around the image. */ | |
35a41507 GM |
7820 | if (hmargin || vmargin) |
7821 | { | |
7822 | if (hmargin == vmargin) | |
7823 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
7824 | else | |
7825 | plist = Fplist_put (plist, QCmargin, | |
7826 | Fcons (make_number (hmargin), | |
7827 | make_number (vmargin))); | |
7828 | } | |
2311178e | 7829 | |
37e4e482 GM |
7830 | /* If button is not enabled, and we don't have special images |
7831 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 7832 | applying an appropriate algorithm to it. */ |
37e4e482 | 7833 | if (!enabled_p && idx < 0) |
ecd01a0e | 7834 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
2311178e | 7835 | |
5f5c8ee5 GM |
7836 | /* Put a `display' text property on the string for the image to |
7837 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 7838 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
7839 | vector. */ |
7840 | image = Fcons (Qimage, plist); | |
7841 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
7842 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
7843 | ||
7844 | /* Let the last image hide all remaining spaces in the tool bar | |
7845 | string. The string can be longer than needed when we reuse a | |
7846 | previous string. */ | |
7847 | if (i + 1 == f->n_tool_bar_items) | |
2051c264 | 7848 | end = SCHARS (f->desired_tool_bar_string); |
a23887b9 GM |
7849 | else |
7850 | end = i + 1; | |
7851 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 7852 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7853 | #undef PROP |
a2889657 JB |
7854 | } |
7855 | ||
5f5c8ee5 GM |
7856 | UNGCPRO; |
7857 | } | |
7858 | ||
7859 | ||
e037b9ec | 7860 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
7861 | |
7862 | static void | |
e037b9ec | 7863 | display_tool_bar_line (it) |
5f5c8ee5 GM |
7864 | struct it *it; |
7865 | { | |
7866 | struct glyph_row *row = it->glyph_row; | |
7867 | int max_x = it->last_visible_x; | |
7868 | struct glyph *last; | |
2311178e | 7869 | |
5f5c8ee5 GM |
7870 | prepare_desired_row (row); |
7871 | row->y = it->current_y; | |
90aa2856 GM |
7872 | |
7873 | /* Note that this isn't made use of if the face hasn't a box, | |
7874 | so there's no need to check the face here. */ | |
7875 | it->start_of_box_run_p = 1; | |
2311178e | 7876 | |
5f5c8ee5 | 7877 | while (it->current_x < max_x) |
a2889657 | 7878 | { |
5f5c8ee5 | 7879 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 7880 | |
5f5c8ee5 GM |
7881 | /* Get the next display element. */ |
7882 | if (!get_next_display_element (it)) | |
7883 | break; | |
73af359d | 7884 | |
5f5c8ee5 GM |
7885 | /* Produce glyphs. */ |
7886 | x_before = it->current_x; | |
7887 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
7888 | PRODUCE_GLYPHS (it); | |
daa37602 | 7889 | |
5f5c8ee5 GM |
7890 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
7891 | i = 0; | |
7892 | x = x_before; | |
7893 | while (i < nglyphs) | |
7894 | { | |
7895 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
2311178e | 7896 | |
5f5c8ee5 GM |
7897 | if (x + glyph->pixel_width > max_x) |
7898 | { | |
7899 | /* Glyph doesn't fit on line. */ | |
7900 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
7901 | it->current_x = x; | |
7902 | goto out; | |
7903 | } | |
daa37602 | 7904 | |
5f5c8ee5 GM |
7905 | ++it->hpos; |
7906 | x += glyph->pixel_width; | |
7907 | ++i; | |
7908 | } | |
7909 | ||
7910 | /* Stop at line ends. */ | |
7911 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
7912 | break; | |
7913 | ||
cafafe0b | 7914 | set_iterator_to_next (it, 1); |
a2889657 | 7915 | } |
a2889657 | 7916 | |
5f5c8ee5 | 7917 | out:; |
a2889657 | 7918 | |
5f5c8ee5 GM |
7919 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
7920 | extend_face_to_end_of_line (it); | |
7921 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
7922 | last->right_box_line_p = 1; | |
90aa2856 GM |
7923 | if (last == row->glyphs[TEXT_AREA]) |
7924 | last->left_box_line_p = 1; | |
5f5c8ee5 | 7925 | compute_line_metrics (it); |
2311178e | 7926 | |
e037b9ec | 7927 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
7928 | if (!row->displays_text_p) |
7929 | { | |
312246d1 GM |
7930 | row->height = row->phys_height = it->last_visible_y - row->y; |
7931 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 | 7932 | } |
2311178e | 7933 | |
5f5c8ee5 GM |
7934 | row->full_width_p = 1; |
7935 | row->continued_p = 0; | |
7936 | row->truncated_on_left_p = 0; | |
7937 | row->truncated_on_right_p = 0; | |
7938 | ||
7939 | it->current_x = it->hpos = 0; | |
7940 | it->current_y += row->height; | |
7941 | ++it->vpos; | |
7942 | ++it->glyph_row; | |
a2889657 | 7943 | } |
96a410bc | 7944 | |
5f5c8ee5 | 7945 | |
e037b9ec | 7946 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 7947 | items of frame F visible. */ |
96a410bc | 7948 | |
d39b6696 | 7949 | static int |
e037b9ec | 7950 | tool_bar_lines_needed (f) |
5f5c8ee5 | 7951 | struct frame *f; |
d39b6696 | 7952 | { |
e037b9ec | 7953 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 7954 | struct it it; |
2311178e | 7955 | |
e037b9ec GM |
7956 | /* Initialize an iterator for iteration over |
7957 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
7958 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7959 | it.first_visible_x = 0; |
7960 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 7961 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
7962 | |
7963 | while (!ITERATOR_AT_END_P (&it)) | |
7964 | { | |
7965 | it.glyph_row = w->desired_matrix->rows; | |
7966 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 7967 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
7968 | } |
7969 | ||
7970 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 7971 | } |
96a410bc | 7972 | |
5f5c8ee5 | 7973 | |
57c28064 GM |
7974 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
7975 | 0, 1, 0, | |
7ee72033 MB |
7976 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
7977 | (frame) | |
57c28064 GM |
7978 | Lisp_Object frame; |
7979 | { | |
7980 | struct frame *f; | |
7981 | struct window *w; | |
7982 | int nlines = 0; | |
7983 | ||
7984 | if (NILP (frame)) | |
7985 | frame = selected_frame; | |
7986 | else | |
b7826503 | 7987 | CHECK_FRAME (frame); |
57c28064 | 7988 | f = XFRAME (frame); |
2311178e | 7989 | |
57c28064 GM |
7990 | if (WINDOWP (f->tool_bar_window) |
7991 | || (w = XWINDOW (f->tool_bar_window), | |
7992 | XFASTINT (w->height) > 0)) | |
7993 | { | |
7994 | update_tool_bar (f, 1); | |
7995 | if (f->n_tool_bar_items) | |
7996 | { | |
7997 | build_desired_tool_bar_string (f); | |
7998 | nlines = tool_bar_lines_needed (f); | |
7999 | } | |
8000 | } | |
8001 | ||
8002 | return make_number (nlines); | |
8003 | } | |
8004 | ||
8005 | ||
e037b9ec | 8006 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
8007 | height should be changed. */ |
8008 | ||
8009 | static int | |
e037b9ec | 8010 | redisplay_tool_bar (f) |
5f5c8ee5 | 8011 | struct frame *f; |
96a410bc | 8012 | { |
5f5c8ee5 GM |
8013 | struct window *w; |
8014 | struct it it; | |
8015 | struct glyph_row *row; | |
8016 | int change_height_p = 0; | |
177c0ea7 | 8017 | |
488dd4c4 JD |
8018 | #ifdef USE_GTK |
8019 | if (FRAME_EXTERNAL_TOOL_BAR(f)) | |
8020 | update_frame_tool_bar (f); | |
8021 | return 0; | |
8022 | #endif | |
2311178e | 8023 | |
e037b9ec GM |
8024 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
8025 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 8026 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
8027 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
8028 | if (!WINDOWP (f->tool_bar_window) | |
8029 | || (w = XWINDOW (f->tool_bar_window), | |
488dd4c4 | 8030 | XFASTINT (w->height) == 0)) |
5f5c8ee5 | 8031 | return 0; |
96a410bc | 8032 | |
e037b9ec GM |
8033 | /* Set up an iterator for the tool-bar window. */ |
8034 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
8035 | it.first_visible_x = 0; |
8036 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
8037 | row = it.glyph_row; | |
3450d04c | 8038 | |
e037b9ec GM |
8039 | /* Build a string that represents the contents of the tool-bar. */ |
8040 | build_desired_tool_bar_string (f); | |
8041 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 8042 | |
e037b9ec | 8043 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 8044 | while (it.current_y < it.last_visible_y) |
e037b9ec | 8045 | display_tool_bar_line (&it); |
3450d04c | 8046 | |
e037b9ec | 8047 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
8048 | window, so don't do it. */ |
8049 | w->desired_matrix->no_scrolling_p = 1; | |
8050 | w->must_be_updated_p = 1; | |
3450d04c | 8051 | |
e037b9ec | 8052 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
8053 | { |
8054 | int nlines; | |
6e33e6f0 GM |
8055 | |
8056 | /* If we couldn't display everything, change the tool-bar's | |
8057 | height. */ | |
8058 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
8059 | change_height_p = 1; | |
2311178e | 8060 | |
5f5c8ee5 GM |
8061 | /* If there are blank lines at the end, except for a partially |
8062 | visible blank line at the end that is smaller than | |
e037b9ec | 8063 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
8064 | row = it.glyph_row - 1; |
8065 | if (!row->displays_text_p | |
8066 | && row->height >= CANON_Y_UNIT (f)) | |
8067 | change_height_p = 1; | |
8068 | ||
e037b9ec GM |
8069 | /* If row displays tool-bar items, but is partially visible, |
8070 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
8071 | if (row->displays_text_p |
8072 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
8073 | change_height_p = 1; | |
8074 | ||
e037b9ec | 8075 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
8076 | frame parameter. */ |
8077 | if (change_height_p | |
e037b9ec | 8078 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
8079 | nlines != XFASTINT (w->height))) |
8080 | { | |
e037b9ec | 8081 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 8082 | Lisp_Object frame; |
e85ee976 | 8083 | int old_height = XFASTINT (w->height); |
2311178e | 8084 | |
5f5c8ee5 GM |
8085 | XSETFRAME (frame, f); |
8086 | clear_glyph_matrix (w->desired_matrix); | |
8087 | Fmodify_frame_parameters (frame, | |
e037b9ec | 8088 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
8089 | make_number (nlines)), |
8090 | Qnil)); | |
e85ee976 GM |
8091 | if (XFASTINT (w->height) != old_height) |
8092 | fonts_changed_p = 1; | |
5f5c8ee5 GM |
8093 | } |
8094 | } | |
3450d04c | 8095 | |
5f5c8ee5 | 8096 | return change_height_p; |
96a410bc | 8097 | } |
90adcf20 | 8098 | |
5f5c8ee5 | 8099 | |
e037b9ec GM |
8100 | /* Get information about the tool-bar item which is displayed in GLYPH |
8101 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 8102 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 8103 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 GM |
8104 | |
8105 | int | |
e037b9ec | 8106 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
8107 | struct frame *f; |
8108 | struct glyph *glyph; | |
8109 | int *prop_idx; | |
90adcf20 | 8110 | { |
5f5c8ee5 GM |
8111 | Lisp_Object prop; |
8112 | int success_p; | |
be676094 GM |
8113 | int charpos; |
8114 | ||
8115 | /* This function can be called asynchronously, which means we must | |
8116 | exclude any possibility that Fget_text_property signals an | |
8117 | error. */ | |
2051c264 | 8118 | charpos = min (SCHARS (f->current_tool_bar_string), glyph->charpos); |
be676094 | 8119 | charpos = max (0, charpos); |
2311178e | 8120 | |
5f5c8ee5 GM |
8121 | /* Get the text property `menu-item' at pos. The value of that |
8122 | property is the start index of this item's properties in | |
7464726e | 8123 | F->tool_bar_items. */ |
be676094 | 8124 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 8125 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
8126 | if (INTEGERP (prop)) |
8127 | { | |
8128 | *prop_idx = XINT (prop); | |
8129 | success_p = 1; | |
8130 | } | |
8131 | else | |
8132 | success_p = 0; | |
90adcf20 | 8133 | |
5f5c8ee5 GM |
8134 | return success_p; |
8135 | } | |
2311178e | 8136 | |
5f5c8ee5 | 8137 | #endif /* HAVE_WINDOW_SYSTEM */ |
ffbbc941 KS |
8138 | |
8139 | ||
8140 | \f | |
8141 | /*********************************************************************** | |
8142 | Fringes | |
8143 | ***********************************************************************/ | |
8144 | ||
8145 | #ifdef HAVE_WINDOW_SYSTEM | |
8146 | ||
8147 | /* An arrow like this: `<-'. */ | |
8148 | static unsigned char left_bits[] = { | |
8149 | 0x18, 0x0c, 0x06, 0x3f, 0x3f, 0x06, 0x0c, 0x18}; | |
8150 | ||
8151 | /* Right truncation arrow bitmap `->'. */ | |
8152 | static unsigned char right_bits[] = { | |
8153 | 0x18, 0x30, 0x60, 0xfc, 0xfc, 0x60, 0x30, 0x18}; | |
8154 | ||
8155 | /* Marker for continued lines. */ | |
8156 | static unsigned char continued_bits[] = { | |
8157 | 0x3c, 0x7c, 0xc0, 0xe4, 0xfc, 0x7c, 0x3c, 0x7c}; | |
8158 | ||
8159 | /* Marker for continuation lines. */ | |
8160 | static unsigned char continuation_bits[] = { | |
8161 | 0x3c, 0x3e, 0x03, 0x27, 0x3f, 0x3e, 0x3c, 0x3e}; | |
8162 | ||
8163 | /* Overlay arrow bitmap. A triangular arrow. */ | |
8164 | static unsigned char ov_bits[] = { | |
8165 | 0x03, 0x0f, 0x1f, 0x3f, 0x3f, 0x1f, 0x0f, 0x03}; | |
8166 | ||
8167 | /* Bitmap drawn to indicate lines not displaying text if | |
8168 | `indicate-empty-lines' is non-nil. */ | |
8169 | static unsigned char zv_bits[] = { | |
8170 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8171 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8172 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8173 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8174 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8175 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8176 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, | |
8177 | 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00}; | |
8178 | ||
8179 | struct fringe_bitmap fringe_bitmaps[MAX_FRINGE_BITMAPS] = | |
8180 | { | |
8181 | { 0, 0, 0, NULL /* NO_FRINGE_BITMAP */ }, | |
8182 | { 8, sizeof (left_bits), 0, left_bits }, | |
8183 | { 8, sizeof (right_bits), 0, right_bits }, | |
8184 | { 8, sizeof (continued_bits), 0, continued_bits }, | |
8185 | { 8, sizeof (continuation_bits), 0, continuation_bits }, | |
8186 | { 8, sizeof (ov_bits), 0, ov_bits }, | |
8187 | { 8, sizeof (zv_bits), 3, zv_bits } | |
8188 | }; | |
8189 | ||
8190 | ||
8191 | /* Draw the bitmap WHICH in one of the left or right fringes of | |
8192 | window W. ROW is the glyph row for which to display the bitmap; it | |
8193 | determines the vertical position at which the bitmap has to be | |
8194 | drawn. */ | |
8195 | ||
8196 | static void | |
8197 | draw_fringe_bitmap (w, row, which, left_p) | |
8198 | struct window *w; | |
8199 | struct glyph_row *row; | |
8200 | enum fringe_bitmap_type which; | |
8201 | int left_p; | |
8202 | { | |
8203 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
8204 | struct draw_fringe_bitmap_params p; | |
8205 | ||
8206 | /* Convert row to frame coordinates. */ | |
8207 | p.y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y); | |
8208 | ||
8209 | p.which = which; | |
8210 | p.wd = fringe_bitmaps[which].width; | |
8211 | ||
8212 | p.h = fringe_bitmaps[which].height; | |
8213 | p.dh = (fringe_bitmaps[which].period | |
8214 | ? (p.y % fringe_bitmaps[which].period) | |
8215 | : 0); | |
8216 | p.h -= p.dh; | |
8217 | /* Clip bitmap if too high. */ | |
8218 | if (p.h > row->height) | |
8219 | p.h = row->height; | |
8220 | ||
8221 | p.face = FACE_FROM_ID (f, FRINGE_FACE_ID); | |
8222 | PREPARE_FACE_FOR_DISPLAY (f, p.face); | |
8223 | ||
8224 | /* Clear left fringe if no bitmap to draw or if bitmap doesn't fill | |
8225 | the fringe. */ | |
8226 | p.bx = -1; | |
8227 | if (left_p) | |
8228 | { | |
8229 | if (p.wd > FRAME_X_LEFT_FRINGE_WIDTH (f)) | |
8230 | p.wd = FRAME_X_LEFT_FRINGE_WIDTH (f); | |
8231 | p.x = (WINDOW_TO_FRAME_PIXEL_X (w, 0) | |
8232 | - p.wd | |
8233 | - (FRAME_X_LEFT_FRINGE_WIDTH (f) - p.wd) / 2); | |
8234 | if (p.wd < FRAME_X_LEFT_FRINGE_WIDTH (f) || row->height > p.h) | |
8235 | { | |
8236 | /* If W has a vertical border to its left, don't draw over it. */ | |
8237 | int border = ((XFASTINT (w->left) > 0 | |
8238 | && !FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
8239 | ? 1 : 0); | |
8240 | p.bx = (window_box_left (w, -1) | |
8241 | - FRAME_X_LEFT_FRINGE_WIDTH (f) | |
8242 | + border); | |
8243 | p.nx = (FRAME_X_LEFT_FRINGE_WIDTH (f) - border); | |
8244 | } | |
8245 | } | |
8246 | else | |
8247 | { | |
8248 | if (p.wd > FRAME_X_RIGHT_FRINGE_WIDTH (f)) | |
8249 | p.wd = FRAME_X_RIGHT_FRINGE_WIDTH (f); | |
8250 | p.x = (window_box_right (w, -1) | |
8251 | + (FRAME_X_RIGHT_FRINGE_WIDTH (f) - p.wd) / 2); | |
8252 | /* Clear right fringe if no bitmap to draw of if bitmap doesn't fill | |
8253 | the fringe. */ | |
8254 | if (p.wd < FRAME_X_RIGHT_FRINGE_WIDTH (f) || row->height > p.h) | |
8255 | { | |
8256 | p.bx = window_box_right (w, -1); | |
8257 | p.nx = FRAME_X_RIGHT_FRINGE_WIDTH (f); | |
8258 | } | |
8259 | } | |
8260 | ||
8261 | if (p.bx >= 0) | |
8262 | { | |
8263 | int header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); | |
8264 | ||
8265 | p.by = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height, row->y)); | |
8266 | p.ny = row->visible_height; | |
8267 | } | |
8268 | ||
8269 | /* Adjust y to the offset in the row to start drawing the bitmap. */ | |
8270 | p.y += (row->height - p.h) / 2; | |
8271 | ||
8272 | rif->draw_fringe_bitmap (w, row, &p); | |
8273 | } | |
8274 | ||
8275 | /* Draw fringe bitmaps for glyph row ROW on window W. Call this | |
8276 | function with input blocked. */ | |
8277 | ||
8278 | void | |
8279 | draw_row_fringe_bitmaps (w, row) | |
8280 | struct window *w; | |
8281 | struct glyph_row *row; | |
8282 | { | |
8283 | struct frame *f = XFRAME (w->frame); | |
8284 | enum fringe_bitmap_type bitmap; | |
8285 | ||
8286 | xassert (interrupt_input_blocked); | |
8287 | ||
8288 | /* If row is completely invisible, because of vscrolling, we | |
8289 | don't have to draw anything. */ | |
8290 | if (row->visible_height <= 0) | |
8291 | return; | |
8292 | ||
8293 | if (FRAME_X_LEFT_FRINGE_WIDTH (f) != 0) | |
8294 | { | |
8295 | /* Decide which bitmap to draw in the left fringe. */ | |
8296 | if (row->overlay_arrow_p) | |
8297 | bitmap = OVERLAY_ARROW_BITMAP; | |
8298 | else if (row->truncated_on_left_p) | |
8299 | bitmap = LEFT_TRUNCATION_BITMAP; | |
8300 | else if (MATRIX_ROW_CONTINUATION_LINE_P (row)) | |
8301 | bitmap = CONTINUATION_LINE_BITMAP; | |
8302 | else if (row->indicate_empty_line_p) | |
8303 | bitmap = ZV_LINE_BITMAP; | |
8304 | else | |
8305 | bitmap = NO_FRINGE_BITMAP; | |
8306 | ||
8307 | draw_fringe_bitmap (w, row, bitmap, 1); | |
8308 | } | |
8309 | ||
8310 | if (FRAME_X_RIGHT_FRINGE_WIDTH (f) != 0) | |
8311 | { | |
8312 | /* Decide which bitmap to draw in the right fringe. */ | |
8313 | if (row->truncated_on_right_p) | |
8314 | bitmap = RIGHT_TRUNCATION_BITMAP; | |
8315 | else if (row->continued_p) | |
8316 | bitmap = CONTINUED_LINE_BITMAP; | |
8317 | else if (row->indicate_empty_line_p && FRAME_X_LEFT_FRINGE_WIDTH (f) == 0) | |
8318 | bitmap = ZV_LINE_BITMAP; | |
8319 | else | |
8320 | bitmap = NO_FRINGE_BITMAP; | |
8321 | ||
8322 | draw_fringe_bitmap (w, row, bitmap, 0); | |
8323 | } | |
8324 | } | |
8325 | ||
8326 | ||
8327 | /* Compute actual fringe widths */ | |
8328 | ||
8329 | void | |
8330 | compute_fringe_widths (f, redraw) | |
8331 | struct frame *f; | |
8332 | int redraw; | |
8333 | { | |
8334 | int o_left = FRAME_X_LEFT_FRINGE_WIDTH (f); | |
8335 | int o_right = FRAME_X_RIGHT_FRINGE_WIDTH (f); | |
8336 | int o_cols = FRAME_X_FRINGE_COLS (f); | |
8337 | ||
8338 | Lisp_Object left_fringe = Fassq (Qleft_fringe, f->param_alist); | |
8339 | Lisp_Object right_fringe = Fassq (Qright_fringe, f->param_alist); | |
8340 | int left_fringe_width, right_fringe_width; | |
8341 | ||
8342 | if (!NILP (left_fringe)) | |
8343 | left_fringe = Fcdr (left_fringe); | |
8344 | if (!NILP (right_fringe)) | |
8345 | right_fringe = Fcdr (right_fringe); | |
8346 | ||
8347 | left_fringe_width = ((NILP (left_fringe) || !INTEGERP (left_fringe)) ? 8 : | |
8348 | XINT (left_fringe)); | |
8349 | right_fringe_width = ((NILP (right_fringe) || !INTEGERP (right_fringe)) ? 8 : | |
8350 | XINT (right_fringe)); | |
8351 | ||
8352 | if (left_fringe_width || right_fringe_width) | |
8353 | { | |
8354 | int left_wid = left_fringe_width >= 0 ? left_fringe_width : -left_fringe_width; | |
8355 | int right_wid = right_fringe_width >= 0 ? right_fringe_width : -right_fringe_width; | |
8356 | int conf_wid = left_wid + right_wid; | |
3ecd814e | 8357 | int font_wid = FONT_WIDTH (FRAME_FONT (f)); |
ffbbc941 KS |
8358 | int cols = (left_wid + right_wid + font_wid-1) / font_wid; |
8359 | int real_wid = cols * font_wid; | |
8360 | if (left_wid && right_wid) | |
8361 | { | |
8362 | if (left_fringe_width < 0) | |
8363 | { | |
8364 | /* Left fringe width is fixed, adjust right fringe if necessary */ | |
8365 | FRAME_X_LEFT_FRINGE_WIDTH (f) = left_wid; | |
8366 | FRAME_X_RIGHT_FRINGE_WIDTH (f) = real_wid - left_wid; | |
8367 | } | |
8368 | else if (right_fringe_width < 0) | |
8369 | { | |
8370 | /* Right fringe width is fixed, adjust left fringe if necessary */ | |
8371 | FRAME_X_LEFT_FRINGE_WIDTH (f) = real_wid - right_wid; | |
8372 | FRAME_X_RIGHT_FRINGE_WIDTH (f) = right_wid; | |
8373 | } | |
8374 | else | |
8375 | { | |
8376 | /* Adjust both fringes with an equal amount. | |
8377 | Note that we are doing integer arithmetic here, so don't | |
8378 | lose a pixel if the total width is an odd number. */ | |
8379 | int fill = real_wid - conf_wid; | |
8380 | FRAME_X_LEFT_FRINGE_WIDTH (f) = left_wid + fill/2; | |
8381 | FRAME_X_RIGHT_FRINGE_WIDTH (f) = right_wid + fill - fill/2; | |
8382 | } | |
8383 | } | |
8384 | else if (left_fringe_width) | |
8385 | { | |
8386 | FRAME_X_LEFT_FRINGE_WIDTH (f) = real_wid; | |
8387 | FRAME_X_RIGHT_FRINGE_WIDTH (f) = 0; | |
8388 | } | |
8389 | else | |
8390 | { | |
8391 | FRAME_X_LEFT_FRINGE_WIDTH (f) = 0; | |
8392 | FRAME_X_RIGHT_FRINGE_WIDTH (f) = real_wid; | |
8393 | } | |
8394 | FRAME_X_FRINGE_COLS (f) = cols; | |
8395 | FRAME_X_FRINGE_WIDTH (f) = real_wid; | |
8396 | } | |
8397 | else | |
8398 | { | |
8399 | FRAME_X_LEFT_FRINGE_WIDTH (f) = 0; | |
8400 | FRAME_X_RIGHT_FRINGE_WIDTH (f) = 0; | |
8401 | FRAME_X_FRINGE_COLS (f) = 0; | |
8402 | FRAME_X_FRINGE_WIDTH (f) = 0; | |
8403 | } | |
8404 | ||
8405 | if (redraw && FRAME_VISIBLE_P (f)) | |
8406 | if (o_left != FRAME_X_LEFT_FRINGE_WIDTH (f) || | |
8407 | o_right != FRAME_X_RIGHT_FRINGE_WIDTH (f) || | |
8408 | o_cols != FRAME_X_FRINGE_COLS (f)) | |
8409 | redraw_frame (f); | |
8410 | } | |
8411 | ||
8412 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 8413 | |
feb0c42f | 8414 | |
5f5c8ee5 GM |
8415 | \f |
8416 | /************************************************************************ | |
8417 | Horizontal scrolling | |
8418 | ************************************************************************/ | |
feb0c42f | 8419 | |
5f5c8ee5 GM |
8420 | static int hscroll_window_tree P_ ((Lisp_Object)); |
8421 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 8422 | |
5f5c8ee5 GM |
8423 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
8424 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
8425 | that it is not within a certain margin at the window's left and | |
8426 | right border. Value is non-zero if any window's hscroll has been | |
8427 | changed. */ | |
8428 | ||
8429 | static int | |
8430 | hscroll_window_tree (window) | |
8431 | Lisp_Object window; | |
8432 | { | |
8433 | int hscrolled_p = 0; | |
e76d28d5 | 8434 | int hscroll_relative_p = FLOATP (Vhscroll_step); |
1df7e8f0 EZ |
8435 | int hscroll_step_abs = 0; |
8436 | double hscroll_step_rel = 0; | |
8437 | ||
8438 | if (hscroll_relative_p) | |
8439 | { | |
e76d28d5 | 8440 | hscroll_step_rel = XFLOAT_DATA (Vhscroll_step); |
1df7e8f0 EZ |
8441 | if (hscroll_step_rel < 0) |
8442 | { | |
8443 | hscroll_relative_p = 0; | |
8444 | hscroll_step_abs = 0; | |
8445 | } | |
8446 | } | |
e76d28d5 | 8447 | else if (INTEGERP (Vhscroll_step)) |
1df7e8f0 | 8448 | { |
e76d28d5 | 8449 | hscroll_step_abs = XINT (Vhscroll_step); |
1df7e8f0 EZ |
8450 | if (hscroll_step_abs < 0) |
8451 | hscroll_step_abs = 0; | |
8452 | } | |
8453 | else | |
8454 | hscroll_step_abs = 0; | |
8455 | ||
5f5c8ee5 | 8456 | while (WINDOWP (window)) |
90adcf20 | 8457 | { |
5f5c8ee5 | 8458 | struct window *w = XWINDOW (window); |
1df7e8f0 | 8459 | |
5f5c8ee5 GM |
8460 | if (WINDOWP (w->hchild)) |
8461 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
8462 | else if (WINDOWP (w->vchild)) | |
8463 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
8464 | else if (w->cursor.vpos >= 0) | |
8465 | { | |
e76d28d5 | 8466 | int h_margin, text_area_x, text_area_y; |
5f5c8ee5 | 8467 | int text_area_width, text_area_height; |
92a90e89 GM |
8468 | struct glyph_row *current_cursor_row |
8469 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
8470 | struct glyph_row *desired_cursor_row | |
8471 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
8472 | struct glyph_row *cursor_row | |
8473 | = (desired_cursor_row->enabled_p | |
8474 | ? desired_cursor_row | |
8475 | : current_cursor_row); | |
a2725ab2 | 8476 | |
5f5c8ee5 GM |
8477 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
8478 | &text_area_width, &text_area_height); | |
90adcf20 | 8479 | |
5f5c8ee5 | 8480 | /* Scroll when cursor is inside this scroll margin. */ |
e76d28d5 | 8481 | h_margin = hscroll_margin * CANON_X_UNIT (XFRAME (w->frame)); |
1df7e8f0 | 8482 | |
5f5c8ee5 | 8483 | if ((XFASTINT (w->hscroll) |
e76d28d5 | 8484 | && w->cursor.x <= h_margin) |
92a90e89 GM |
8485 | || (cursor_row->enabled_p |
8486 | && cursor_row->truncated_on_right_p | |
e76d28d5 | 8487 | && (w->cursor.x >= text_area_width - h_margin))) |
08b610e4 | 8488 | { |
5f5c8ee5 GM |
8489 | struct it it; |
8490 | int hscroll; | |
8491 | struct buffer *saved_current_buffer; | |
8492 | int pt; | |
1df7e8f0 | 8493 | int wanted_x; |
5f5c8ee5 GM |
8494 | |
8495 | /* Find point in a display of infinite width. */ | |
8496 | saved_current_buffer = current_buffer; | |
8497 | current_buffer = XBUFFER (w->buffer); | |
1df7e8f0 | 8498 | |
5f5c8ee5 GM |
8499 | if (w == XWINDOW (selected_window)) |
8500 | pt = BUF_PT (current_buffer); | |
8501 | else | |
08b610e4 | 8502 | { |
5f5c8ee5 GM |
8503 | pt = marker_position (w->pointm); |
8504 | pt = max (BEGV, pt); | |
8505 | pt = min (ZV, pt); | |
8506 | } | |
8507 | ||
8508 | /* Move iterator to pt starting at cursor_row->start in | |
8509 | a line with infinite width. */ | |
8510 | init_to_row_start (&it, w, cursor_row); | |
8511 | it.last_visible_x = INFINITY; | |
8512 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
8513 | current_buffer = saved_current_buffer; | |
8514 | ||
1df7e8f0 EZ |
8515 | /* Position cursor in window. */ |
8516 | if (!hscroll_relative_p && hscroll_step_abs == 0) | |
8517 | hscroll = max (0, it.current_x - text_area_width / 2) | |
8518 | / CANON_X_UNIT (it.f); | |
e76d28d5 | 8519 | else if (w->cursor.x >= text_area_width - h_margin) |
1df7e8f0 EZ |
8520 | { |
8521 | if (hscroll_relative_p) | |
8522 | wanted_x = text_area_width * (1 - hscroll_step_rel) | |
e76d28d5 | 8523 | - h_margin; |
1df7e8f0 EZ |
8524 | else |
8525 | wanted_x = text_area_width | |
8526 | - hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8527 | - h_margin; |
1df7e8f0 EZ |
8528 | hscroll |
8529 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8530 | } | |
8531 | else | |
8532 | { | |
8533 | if (hscroll_relative_p) | |
8534 | wanted_x = text_area_width * hscroll_step_rel | |
e76d28d5 | 8535 | + h_margin; |
1df7e8f0 EZ |
8536 | else |
8537 | wanted_x = hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8538 | + h_margin; |
1df7e8f0 EZ |
8539 | hscroll |
8540 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8541 | } | |
3172f70b | 8542 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
8543 | |
8544 | /* Don't call Fset_window_hscroll if value hasn't | |
8545 | changed because it will prevent redisplay | |
8546 | optimizations. */ | |
8547 | if (XFASTINT (w->hscroll) != hscroll) | |
8548 | { | |
3172f70b GM |
8549 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
8550 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 8551 | hscrolled_p = 1; |
08b610e4 | 8552 | } |
08b610e4 | 8553 | } |
08b610e4 | 8554 | } |
a2725ab2 | 8555 | |
5f5c8ee5 | 8556 | window = w->next; |
90adcf20 | 8557 | } |
cd6dfed6 | 8558 | |
5f5c8ee5 GM |
8559 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
8560 | return hscrolled_p; | |
8561 | } | |
8562 | ||
8563 | ||
8564 | /* Set hscroll so that cursor is visible and not inside horizontal | |
8565 | scroll margins for all windows in the tree rooted at WINDOW. See | |
8566 | also hscroll_window_tree above. Value is non-zero if any window's | |
8567 | hscroll has been changed. If it has, desired matrices on the frame | |
8568 | of WINDOW are cleared. */ | |
8569 | ||
8570 | static int | |
8571 | hscroll_windows (window) | |
8572 | Lisp_Object window; | |
8573 | { | |
d475bcb8 | 8574 | int hscrolled_p; |
2311178e | 8575 | |
d475bcb8 GM |
8576 | if (automatic_hscrolling_p) |
8577 | { | |
8578 | hscrolled_p = hscroll_window_tree (window); | |
8579 | if (hscrolled_p) | |
8580 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
8581 | } | |
8582 | else | |
8583 | hscrolled_p = 0; | |
5f5c8ee5 | 8584 | return hscrolled_p; |
90adcf20 | 8585 | } |
5f5c8ee5 GM |
8586 | |
8587 | ||
90adcf20 | 8588 | \f |
5f5c8ee5 GM |
8589 | /************************************************************************ |
8590 | Redisplay | |
8591 | ************************************************************************/ | |
8592 | ||
8593 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
8594 | to a non-zero value. This is sometimes handy to have in a debugger | |
8595 | session. */ | |
8596 | ||
8597 | #if GLYPH_DEBUG | |
a2889657 | 8598 | |
5f5c8ee5 GM |
8599 | /* First and last unchanged row for try_window_id. */ |
8600 | ||
8601 | int debug_first_unchanged_at_end_vpos; | |
8602 | int debug_last_unchanged_at_beg_vpos; | |
8603 | ||
8604 | /* Delta vpos and y. */ | |
8605 | ||
8606 | int debug_dvpos, debug_dy; | |
8607 | ||
8608 | /* Delta in characters and bytes for try_window_id. */ | |
8609 | ||
8610 | int debug_delta, debug_delta_bytes; | |
8611 | ||
8612 | /* Values of window_end_pos and window_end_vpos at the end of | |
8613 | try_window_id. */ | |
8614 | ||
31ade731 | 8615 | EMACS_INT debug_end_pos, debug_end_vpos; |
5f5c8ee5 GM |
8616 | |
8617 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
8618 | format string. A1...A9 are a supplement for a variable-length | |
8619 | argument list. If trace_redisplay_p is non-zero also printf the | |
8620 | resulting string to stderr. */ | |
8621 | ||
8622 | static void | |
8623 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
8624 | struct window *w; | |
8625 | char *fmt; | |
8626 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
8627 | { | |
8628 | char buffer[512]; | |
8629 | char *method = w->desired_matrix->method; | |
8630 | int len = strlen (method); | |
8631 | int size = sizeof w->desired_matrix->method; | |
8632 | int remaining = size - len - 1; | |
8633 | ||
8634 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
8635 | if (len && remaining) | |
8636 | { | |
8637 | method[len] = '|'; | |
8638 | --remaining, ++len; | |
8639 | } | |
2311178e | 8640 | |
5f5c8ee5 GM |
8641 | strncpy (method + len, buffer, remaining); |
8642 | ||
8643 | if (trace_redisplay_p) | |
8644 | fprintf (stderr, "%p (%s): %s\n", | |
8645 | w, | |
8646 | ((BUFFERP (w->buffer) | |
8647 | && STRINGP (XBUFFER (w->buffer)->name)) | |
2051c264 | 8648 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
5f5c8ee5 GM |
8649 | : "no buffer"), |
8650 | buffer); | |
8651 | } | |
a2889657 | 8652 | |
5f5c8ee5 | 8653 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 8654 | |
a2889657 | 8655 | |
5f5c8ee5 GM |
8656 | /* Value is non-zero if all changes in window W, which displays |
8657 | current_buffer, are in the text between START and END. START is a | |
8658 | buffer position, END is given as a distance from Z. Used in | |
8659 | redisplay_internal for display optimization. */ | |
8660 | ||
8661 | static INLINE int | |
8662 | text_outside_line_unchanged_p (w, start, end) | |
8663 | struct window *w; | |
8664 | int start, end; | |
8665 | { | |
8666 | int unchanged_p = 1; | |
2311178e | 8667 | |
5f5c8ee5 GM |
8668 | /* If text or overlays have changed, see where. */ |
8669 | if (XFASTINT (w->last_modified) < MODIFF | |
8670 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
8671 | { | |
8672 | /* Gap in the line? */ | |
8673 | if (GPT < start || Z - GPT < end) | |
8674 | unchanged_p = 0; | |
8675 | ||
8676 | /* Changes start in front of the line, or end after it? */ | |
8677 | if (unchanged_p | |
9142dd5b GM |
8678 | && (BEG_UNCHANGED < start - 1 |
8679 | || END_UNCHANGED < end)) | |
5f5c8ee5 | 8680 | unchanged_p = 0; |
2311178e | 8681 | |
5f5c8ee5 GM |
8682 | /* If selective display, can't optimize if changes start at the |
8683 | beginning of the line. */ | |
8684 | if (unchanged_p | |
8685 | && INTEGERP (current_buffer->selective_display) | |
8686 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 8687 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 8688 | unchanged_p = 0; |
47d57b22 GM |
8689 | |
8690 | /* If there are overlays at the start or end of the line, these | |
8691 | may have overlay strings with newlines in them. A change at | |
8692 | START, for instance, may actually concern the display of such | |
8693 | overlay strings as well, and they are displayed on different | |
8694 | lines. So, quickly rule out this case. (For the future, it | |
8695 | might be desirable to implement something more telling than | |
8696 | just BEG/END_UNCHANGED.) */ | |
8697 | if (unchanged_p) | |
8698 | { | |
8699 | if (BEG + BEG_UNCHANGED == start | |
8700 | && overlay_touches_p (start)) | |
8701 | unchanged_p = 0; | |
8702 | if (END_UNCHANGED == end | |
8703 | && overlay_touches_p (Z - end)) | |
8704 | unchanged_p = 0; | |
8705 | } | |
5f5c8ee5 GM |
8706 | } |
8707 | ||
8708 | return unchanged_p; | |
8709 | } | |
8710 | ||
8711 | ||
8712 | /* Do a frame update, taking possible shortcuts into account. This is | |
8713 | the main external entry point for redisplay. | |
8714 | ||
8715 | If the last redisplay displayed an echo area message and that message | |
8716 | is no longer requested, we clear the echo area or bring back the | |
8717 | mini-buffer if that is in use. */ | |
20de20dc | 8718 | |
a2889657 JB |
8719 | void |
8720 | redisplay () | |
e9874cee RS |
8721 | { |
8722 | redisplay_internal (0); | |
8723 | } | |
8724 | ||
47d57b22 | 8725 | |
260a86a0 KH |
8726 | /* Return 1 if point moved out of or into a composition. Otherwise |
8727 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
8728 | position. BUF and PT are the current point buffer and position. */ | |
8729 | ||
8730 | int | |
8731 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
8732 | struct buffer *prev_buf, *buf; | |
8733 | int prev_pt, pt; | |
8734 | { | |
8735 | int start, end; | |
8736 | Lisp_Object prop; | |
8737 | Lisp_Object buffer; | |
8738 | ||
8739 | XSETBUFFER (buffer, buf); | |
8740 | /* Check a composition at the last point if point moved within the | |
8741 | same buffer. */ | |
8742 | if (prev_buf == buf) | |
8743 | { | |
8744 | if (prev_pt == pt) | |
8745 | /* Point didn't move. */ | |
8746 | return 0; | |
2311178e | 8747 | |
260a86a0 KH |
8748 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) |
8749 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
8750 | && COMPOSITION_VALID_P (start, end, prop) | |
8751 | && start < prev_pt && end > prev_pt) | |
8752 | /* The last point was within the composition. Return 1 iff | |
8753 | point moved out of the composition. */ | |
8754 | return (pt <= start || pt >= end); | |
8755 | } | |
8756 | ||
8757 | /* Check a composition at the current point. */ | |
8758 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
8759 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
8760 | && COMPOSITION_VALID_P (start, end, prop) | |
8761 | && start < pt && end > pt); | |
8762 | } | |
5f5c8ee5 | 8763 | |
47d57b22 | 8764 | |
9142dd5b GM |
8765 | /* Reconsider the setting of B->clip_changed which is displayed |
8766 | in window W. */ | |
8767 | ||
8768 | static INLINE void | |
8769 | reconsider_clip_changes (w, b) | |
8770 | struct window *w; | |
8771 | struct buffer *b; | |
8772 | { | |
c62c1bb5 | 8773 | if (b->clip_changed |
9142dd5b GM |
8774 | && !NILP (w->window_end_valid) |
8775 | && w->current_matrix->buffer == b | |
8776 | && w->current_matrix->zv == BUF_ZV (b) | |
8777 | && w->current_matrix->begv == BUF_BEGV (b)) | |
8778 | b->clip_changed = 0; | |
260a86a0 KH |
8779 | |
8780 | /* If display wasn't paused, and W is not a tool bar window, see if | |
8781 | point has been moved into or out of a composition. In that case, | |
8782 | we set b->clip_changed to 1 to force updating the screen. If | |
8783 | b->clip_changed has already been set to 1, we can skip this | |
8784 | check. */ | |
8785 | if (!b->clip_changed | |
8786 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
8787 | { | |
8788 | int pt; | |
8789 | ||
8790 | if (w == XWINDOW (selected_window)) | |
8791 | pt = BUF_PT (current_buffer); | |
8792 | else | |
8793 | pt = marker_position (w->pointm); | |
8794 | ||
8795 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 8796 | || pt != XINT (w->last_point)) |
260a86a0 | 8797 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 8798 | XINT (w->last_point), |
260a86a0 KH |
8799 | XBUFFER (w->buffer), pt)) |
8800 | b->clip_changed = 1; | |
8801 | } | |
9142dd5b | 8802 | } |
aac2d8b2 RS |
8803 | \f |
8804 | #define STOP_POLLING \ | |
8805 | do { if (! polling_stopped_here) stop_polling (); \ | |
8806 | polling_stopped_here = 1; } while (0) | |
8807 | ||
8808 | #define RESUME_POLLING \ | |
8809 | do { if (polling_stopped_here) start_polling (); \ | |
8810 | polling_stopped_here = 0; } while (0) | |
9142dd5b GM |
8811 | |
8812 | ||
5f5c8ee5 GM |
8813 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
8814 | response to any user action; therefore, we should preserve the echo | |
8815 | area. (Actually, our caller does that job.) Perhaps in the future | |
8816 | avoid recentering windows if it is not necessary; currently that | |
8817 | causes some problems. */ | |
e9874cee RS |
8818 | |
8819 | static void | |
8820 | redisplay_internal (preserve_echo_area) | |
8821 | int preserve_echo_area; | |
a2889657 | 8822 | { |
5f5c8ee5 GM |
8823 | struct window *w = XWINDOW (selected_window); |
8824 | struct frame *f = XFRAME (w->frame); | |
8825 | int pause; | |
a2889657 | 8826 | int must_finish = 0; |
5f5c8ee5 | 8827 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 8828 | int number_of_visible_frames; |
28514cd9 | 8829 | int count; |
886bd6f2 | 8830 | struct frame *sf = SELECTED_FRAME (); |
aac2d8b2 | 8831 | int polling_stopped_here = 0; |
a2889657 | 8832 | |
5f5c8ee5 GM |
8833 | /* Non-zero means redisplay has to consider all windows on all |
8834 | frames. Zero means, only selected_window is considered. */ | |
8835 | int consider_all_windows_p; | |
2311178e | 8836 | |
5f5c8ee5 GM |
8837 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); |
8838 | ||
8839 | /* No redisplay if running in batch mode or frame is not yet fully | |
8840 | initialized, or redisplay is explicitly turned off by setting | |
8841 | Vinhibit_redisplay. */ | |
8842 | if (noninteractive | |
8843 | || !NILP (Vinhibit_redisplay) | |
8844 | || !f->glyphs_initialized_p) | |
a2889657 JB |
8845 | return; |
8846 | ||
5f5c8ee5 GM |
8847 | /* The flag redisplay_performed_directly_p is set by |
8848 | direct_output_for_insert when it already did the whole screen | |
8849 | update necessary. */ | |
8850 | if (redisplay_performed_directly_p) | |
8851 | { | |
8852 | redisplay_performed_directly_p = 0; | |
8853 | if (!hscroll_windows (selected_window)) | |
8854 | return; | |
8855 | } | |
8856 | ||
488dd4c4 | 8857 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
15f0cf78 RS |
8858 | if (popup_activated ()) |
8859 | return; | |
8860 | #endif | |
8861 | ||
28514cd9 | 8862 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 8863 | if (redisplaying_p) |
735c094c KH |
8864 | return; |
8865 | ||
28514cd9 GM |
8866 | /* Record a function that resets redisplaying_p to its old value |
8867 | when we leave this function. */ | |
331379bf | 8868 | count = SPECPDL_INDEX (); |
28514cd9 GM |
8869 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); |
8870 | ++redisplaying_p; | |
26683087 | 8871 | specbind (Qinhibit_free_realized_faces, Qnil); |
2311178e | 8872 | |
8b32d885 | 8873 | retry: |
bd9d0f3f | 8874 | pause = 0; |
9142dd5b GM |
8875 | reconsider_clip_changes (w, current_buffer); |
8876 | ||
5f5c8ee5 GM |
8877 | /* If new fonts have been loaded that make a glyph matrix adjustment |
8878 | necessary, do it. */ | |
8879 | if (fonts_changed_p) | |
8880 | { | |
8881 | adjust_glyphs (NULL); | |
8882 | ++windows_or_buffers_changed; | |
8883 | fonts_changed_p = 0; | |
8884 | } | |
8885 | ||
6961e0c1 GM |
8886 | /* If face_change_count is non-zero, init_iterator will free all |
8887 | realized faces, which includes the faces referenced from current | |
8888 | matrices. So, we can't reuse current matrices in this case. */ | |
8889 | if (face_change_count) | |
8890 | ++windows_or_buffers_changed; | |
8891 | ||
886bd6f2 GM |
8892 | if (! FRAME_WINDOW_P (sf) |
8893 | && previous_terminal_frame != sf) | |
20de20dc | 8894 | { |
5f5c8ee5 GM |
8895 | /* Since frames on an ASCII terminal share the same display |
8896 | area, displaying a different frame means redisplay the whole | |
8897 | thing. */ | |
20de20dc | 8898 | windows_or_buffers_changed++; |
886bd6f2 GM |
8899 | SET_FRAME_GARBAGED (sf); |
8900 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 8901 | } |
886bd6f2 | 8902 | previous_terminal_frame = sf; |
20de20dc | 8903 | |
5f5c8ee5 GM |
8904 | /* Set the visible flags for all frames. Do this before checking |
8905 | for resized or garbaged frames; they want to know if their frames | |
8906 | are visible. See the comment in frame.h for | |
8907 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 8908 | { |
35f56f96 | 8909 | Lisp_Object tail, frame; |
d724d989 | 8910 | |
89819bdd RS |
8911 | number_of_visible_frames = 0; |
8912 | ||
35f56f96 | 8913 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 8914 | { |
5f5c8ee5 | 8915 | struct frame *f = XFRAME (frame); |
2311178e | 8916 | |
5f5c8ee5 GM |
8917 | FRAME_SAMPLE_VISIBILITY (f); |
8918 | if (FRAME_VISIBLE_P (f)) | |
8919 | ++number_of_visible_frames; | |
8920 | clear_desired_matrices (f); | |
f82aff7c | 8921 | } |
d724d989 JB |
8922 | } |
8923 | ||
44fa5b1e | 8924 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 8925 | do_pending_window_change (1); |
a2889657 | 8926 | |
5f5c8ee5 | 8927 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 8928 | if (frame_garbaged) |
c6e89d6c | 8929 | clear_garbaged_frames (); |
a2889657 | 8930 | |
e037b9ec | 8931 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
8932 | prepare_menu_bars (); |
8933 | ||
28995e67 | 8934 | if (windows_or_buffers_changed) |
a2889657 JB |
8935 | update_mode_lines++; |
8936 | ||
538f13d4 RS |
8937 | /* Detect case that we need to write or remove a star in the mode line. */ |
8938 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
8939 | { |
8940 | w->update_mode_line = Qt; | |
8941 | if (buffer_shared > 1) | |
8942 | update_mode_lines++; | |
8943 | } | |
8944 | ||
5f5c8ee5 | 8945 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
8946 | if (!NILP (w->column_number_displayed) |
8947 | /* This alternative quickly identifies a common case | |
8948 | where no change is needed. */ | |
8949 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8950 | && XFASTINT (w->last_modified) >= MODIFF |
8951 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
8952 | && (XFASTINT (w->column_number_displayed) |
8953 | != (int) current_column ())) /* iftc */ | |
8954 | w->update_mode_line = Qt; | |
28995e67 | 8955 | |
44fa5b1e | 8956 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 8957 | |
5f5c8ee5 GM |
8958 | /* The variable buffer_shared is set in redisplay_window and |
8959 | indicates that we redisplay a buffer in different windows. See | |
8960 | there. */ | |
5fb96e96 RS |
8961 | consider_all_windows_p = (update_mode_lines || buffer_shared > 1 |
8962 | || cursor_type_changed); | |
a2889657 JB |
8963 | |
8964 | /* If specs for an arrow have changed, do thorough redisplay | |
8965 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 8966 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 8967 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 8968 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 8969 | |
90adcf20 RS |
8970 | /* Normally the message* functions will have already displayed and |
8971 | updated the echo area, but the frame may have been trashed, or | |
8972 | the update may have been preempted, so display the echo area | |
6e019995 | 8973 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 8974 | the echo area should be cleared. */ |
96d5e9a0 GM |
8975 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
8976 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
8977 | || (message_cleared_p |
8978 | && minibuf_level == 0 | |
8979 | /* If the mini-window is currently selected, this means the | |
8980 | echo-area doesn't show through. */ | |
8981 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 8982 | { |
c6e89d6c | 8983 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 8984 | must_finish = 1; |
6e019995 GM |
8985 | |
8986 | /* If we don't display the current message, don't clear the | |
8987 | message_cleared_p flag, because, if we did, we wouldn't clear | |
8988 | the echo area in the next redisplay which doesn't preserve | |
8989 | the echo area. */ | |
8990 | if (!display_last_displayed_message_p) | |
8991 | message_cleared_p = 0; | |
2311178e | 8992 | |
c6e89d6c GM |
8993 | if (fonts_changed_p) |
8994 | goto retry; | |
8995 | else if (window_height_changed_p) | |
8996 | { | |
8997 | consider_all_windows_p = 1; | |
8998 | ++update_mode_lines; | |
8999 | ++windows_or_buffers_changed; | |
2311178e | 9000 | |
9142dd5b GM |
9001 | /* If window configuration was changed, frames may have been |
9002 | marked garbaged. Clear them or we will experience | |
9003 | surprises wrt scrolling. */ | |
9004 | if (frame_garbaged) | |
9005 | clear_garbaged_frames (); | |
c6e89d6c | 9006 | } |
90adcf20 | 9007 | } |
97a36635 | 9008 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
9009 | && (current_buffer->clip_changed |
9010 | || XFASTINT (w->last_modified) < MODIFF | |
9011 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 9012 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
9013 | { |
9014 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
9015 | showing if its contents might have changed. */ |
9016 | must_finish = 1; | |
9017 | consider_all_windows_p = 1; | |
c6e89d6c | 9018 | ++windows_or_buffers_changed; |
dd2eb166 | 9019 | ++update_mode_lines; |
2311178e | 9020 | |
9142dd5b GM |
9021 | /* If window configuration was changed, frames may have been |
9022 | marked garbaged. Clear them or we will experience | |
9023 | surprises wrt scrolling. */ | |
9024 | if (frame_garbaged) | |
9025 | clear_garbaged_frames (); | |
c6e89d6c | 9026 | } |
2311178e | 9027 | |
90adcf20 | 9028 | |
5f5c8ee5 GM |
9029 | /* If showing the region, and mark has changed, we must redisplay |
9030 | the whole window. The assignment to this_line_start_pos prevents | |
9031 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
9032 | if (((!NILP (Vtransient_mark_mode) |
9033 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
9034 | != !NILP (w->region_showing)) | |
82d04750 JB |
9035 | || (!NILP (w->region_showing) |
9036 | && !EQ (w->region_showing, | |
9037 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
9038 | CHARPOS (this_line_start_pos) = 0; |
9039 | ||
9040 | /* Optimize the case that only the line containing the cursor in the | |
9041 | selected window has changed. Variables starting with this_ are | |
9042 | set in display_line and record information about the line | |
9043 | containing the cursor. */ | |
9044 | tlbufpos = this_line_start_pos; | |
9045 | tlendpos = this_line_end_pos; | |
9046 | if (!consider_all_windows_p | |
9047 | && CHARPOS (tlbufpos) > 0 | |
9048 | && NILP (w->update_mode_line) | |
73af359d | 9049 | && !current_buffer->clip_changed |
c62c1bb5 | 9050 | && !current_buffer->prevent_redisplay_optimizations_p |
44fa5b1e | 9051 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 9052 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 9053 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
9054 | && this_line_buffer == current_buffer |
9055 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 9056 | && NILP (w->force_start) |
acda20e1 | 9057 | && NILP (w->optional_new_start) |
5f5c8ee5 GM |
9058 | /* Point must be on the line that we have info recorded about. */ |
9059 | && PT >= CHARPOS (tlbufpos) | |
9060 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
9061 | /* All text outside that line, including its final newline, |
9062 | must be unchanged */ | |
5f5c8ee5 GM |
9063 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
9064 | CHARPOS (tlendpos))) | |
9065 | { | |
9066 | if (CHARPOS (tlbufpos) > BEGV | |
9067 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
9068 | && (CHARPOS (tlbufpos) == ZV | |
9069 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
9070 | /* Former continuation line has disappeared by becoming empty */ |
9071 | goto cancel; | |
9072 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 9073 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
9074 | || MINI_WINDOW_P (w)) |
9075 | { | |
1c9241f5 KH |
9076 | /* We have to handle the case of continuation around a |
9077 | wide-column character (See the comment in indent.c around | |
9078 | line 885). | |
9079 | ||
9080 | For instance, in the following case: | |
9081 | ||
9082 | -------- Insert -------- | |
9083 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
9084 | J_I_ ==> J_I_ `^^' are cursors. | |
9085 | ^^ ^^ | |
9086 | -------- -------- | |
9087 | ||
9088 | As we have to redraw the line above, we should goto cancel. */ | |
9089 | ||
5f5c8ee5 GM |
9090 | struct it it; |
9091 | int line_height_before = this_line_pixel_height; | |
9092 | ||
9093 | /* Note that start_display will handle the case that the | |
9094 | line starting at tlbufpos is a continuation lines. */ | |
9095 | start_display (&it, w, tlbufpos); | |
9096 | ||
9097 | /* Implementation note: It this still necessary? */ | |
9098 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
9099 | goto cancel; |
9100 | ||
5f5c8ee5 GM |
9101 | TRACE ((stderr, "trying display optimization 1\n")); |
9102 | w->cursor.vpos = -1; | |
a2889657 | 9103 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
9104 | it.vpos = this_line_vpos; |
9105 | it.current_y = this_line_y; | |
9106 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
9107 | display_line (&it); | |
9108 | ||
a2889657 | 9109 | /* If line contains point, is not continued, |
5f5c8ee5 | 9110 | and ends at same distance from eob as before, we win */ |
2311178e | 9111 | if (w->cursor.vpos >= 0 |
5f5c8ee5 GM |
9112 | /* Line is not continued, otherwise this_line_start_pos |
9113 | would have been set to 0 in display_line. */ | |
9114 | && CHARPOS (this_line_start_pos) | |
9115 | /* Line ends as before. */ | |
9116 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
9117 | /* Line has same height as before. Otherwise other lines | |
9118 | would have to be shifted up or down. */ | |
9119 | && this_line_pixel_height == line_height_before) | |
a2889657 | 9120 | { |
5f5c8ee5 GM |
9121 | /* If this is not the window's last line, we must adjust |
9122 | the charstarts of the lines below. */ | |
9123 | if (it.current_y < it.last_visible_y) | |
9124 | { | |
9125 | struct glyph_row *row | |
9126 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
9127 | int delta, delta_bytes; | |
2311178e | 9128 | |
5f5c8ee5 GM |
9129 | if (Z - CHARPOS (tlendpos) == ZV) |
9130 | { | |
9131 | /* This line ends at end of (accessible part of) | |
9132 | buffer. There is no newline to count. */ | |
9133 | delta = (Z | |
9134 | - CHARPOS (tlendpos) | |
9135 | - MATRIX_ROW_START_CHARPOS (row)); | |
9136 | delta_bytes = (Z_BYTE | |
9137 | - BYTEPOS (tlendpos) | |
9138 | - MATRIX_ROW_START_BYTEPOS (row)); | |
9139 | } | |
9140 | else | |
9141 | { | |
9142 | /* This line ends in a newline. Must take | |
9143 | account of the newline and the rest of the | |
9144 | text that follows. */ | |
9145 | delta = (Z | |
9146 | - CHARPOS (tlendpos) | |
9147 | - MATRIX_ROW_START_CHARPOS (row)); | |
9148 | delta_bytes = (Z_BYTE | |
9149 | - BYTEPOS (tlendpos) | |
9150 | - MATRIX_ROW_START_BYTEPOS (row)); | |
9151 | } | |
2311178e | 9152 | |
f2d86d7a GM |
9153 | increment_matrix_positions (w->current_matrix, |
9154 | this_line_vpos + 1, | |
9155 | w->current_matrix->nrows, | |
9156 | delta, delta_bytes); | |
85bcef6c | 9157 | } |
46db8486 | 9158 | |
5f5c8ee5 GM |
9159 | /* If this row displays text now but previously didn't, |
9160 | or vice versa, w->window_end_vpos may have to be | |
9161 | adjusted. */ | |
9162 | if ((it.glyph_row - 1)->displays_text_p) | |
9163 | { | |
9164 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
9165 | XSETINT (w->window_end_vpos, this_line_vpos); | |
9166 | } | |
9167 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
9168 | && this_line_vpos > 0) | |
9169 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
9170 | w->window_end_valid = Qnil; | |
2311178e | 9171 | |
5f5c8ee5 GM |
9172 | /* Update hint: No need to try to scroll in update_window. */ |
9173 | w->desired_matrix->no_scrolling_p = 1; | |
9174 | ||
9175 | #if GLYPH_DEBUG | |
9176 | *w->desired_matrix->method = 0; | |
9177 | debug_method_add (w, "optimization 1"); | |
9178 | #endif | |
a2889657 JB |
9179 | goto update; |
9180 | } | |
9181 | else | |
9182 | goto cancel; | |
9183 | } | |
5f5c8ee5 GM |
9184 | else if (/* Cursor position hasn't changed. */ |
9185 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
9186 | /* Make sure the cursor was last displayed |
9187 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
9188 | && 0 <= w->cursor.vpos |
9189 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
9190 | { |
9191 | if (!must_finish) | |
9192 | { | |
c6e89d6c | 9193 | do_pending_window_change (1); |
5f5c8ee5 | 9194 | |
2311178e | 9195 | /* We used to always goto end_of_redisplay here, but this |
5f5c8ee5 GM |
9196 | isn't enough if we have a blinking cursor. */ |
9197 | if (w->cursor_off_p == w->last_cursor_off_p) | |
9198 | goto end_of_redisplay; | |
a2889657 JB |
9199 | } |
9200 | goto update; | |
9201 | } | |
8b51f1e3 KH |
9202 | /* If highlighting the region, or if the cursor is in the echo area, |
9203 | then we can't just move the cursor. */ | |
bd66d1ba RS |
9204 | else if (! (!NILP (Vtransient_mark_mode) |
9205 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 9206 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 9207 | || highlight_nonselected_windows) |
8b51f1e3 | 9208 | && NILP (w->region_showing) |
8f897821 | 9209 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 9210 | && !cursor_in_echo_area) |
a2889657 | 9211 | { |
5f5c8ee5 GM |
9212 | struct it it; |
9213 | struct glyph_row *row; | |
9214 | ||
9215 | /* Skip from tlbufpos to PT and see where it is. Note that | |
9216 | PT may be in invisible text. If so, we will end at the | |
9217 | next visible position. */ | |
9218 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
9219 | NULL, DEFAULT_FACE_ID); | |
9220 | it.current_x = this_line_start_x; | |
9221 | it.current_y = this_line_y; | |
9222 | it.vpos = this_line_vpos; | |
2311178e | 9223 | |
5f5c8ee5 GM |
9224 | /* The call to move_it_to stops in front of PT, but |
9225 | moves over before-strings. */ | |
9226 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
9227 | ||
9228 | if (it.vpos == this_line_vpos | |
9229 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
9230 | row->enabled_p)) | |
a2889657 | 9231 | { |
5f5c8ee5 GM |
9232 | xassert (this_line_vpos == it.vpos); |
9233 | xassert (this_line_y == it.current_y); | |
9234 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
9235 | #if GLYPH_DEBUG |
9236 | *w->desired_matrix->method = 0; | |
9237 | debug_method_add (w, "optimization 3"); | |
9238 | #endif | |
a2889657 JB |
9239 | goto update; |
9240 | } | |
9241 | else | |
9242 | goto cancel; | |
9243 | } | |
5f5c8ee5 | 9244 | |
a2889657 | 9245 | cancel: |
5f5c8ee5 GM |
9246 | /* Text changed drastically or point moved off of line. */ |
9247 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
9248 | } |
9249 | ||
5f5c8ee5 GM |
9250 | CHARPOS (this_line_start_pos) = 0; |
9251 | consider_all_windows_p |= buffer_shared > 1; | |
9252 | ++clear_face_cache_count; | |
a2889657 | 9253 | |
2311178e | 9254 | |
bd9d0f3f GM |
9255 | /* Build desired matrices, and update the display. If |
9256 | consider_all_windows_p is non-zero, do it for all windows on all | |
9257 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 9258 | |
5f5c8ee5 | 9259 | if (consider_all_windows_p) |
a2889657 | 9260 | { |
35f56f96 | 9261 | Lisp_Object tail, frame; |
0528abe1 GM |
9262 | int i, n = 0, size = 50; |
9263 | struct frame **updated | |
9264 | = (struct frame **) alloca (size * sizeof *updated); | |
a2889657 | 9265 | |
5f5c8ee5 GM |
9266 | /* Clear the face cache eventually. */ |
9267 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 9268 | { |
5f5c8ee5 | 9269 | clear_face_cache (0); |
463f6b91 RS |
9270 | clear_face_cache_count = 0; |
9271 | } | |
31b24551 | 9272 | |
5f5c8ee5 GM |
9273 | /* Recompute # windows showing selected buffer. This will be |
9274 | incremented each time such a window is displayed. */ | |
a2889657 JB |
9275 | buffer_shared = 0; |
9276 | ||
35f56f96 | 9277 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 9278 | { |
5f5c8ee5 | 9279 | struct frame *f = XFRAME (frame); |
2311178e | 9280 | |
886bd6f2 | 9281 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 9282 | { |
ae02e06a | 9283 | #ifdef HAVE_WINDOW_SYSTEM |
bb336f8d RS |
9284 | if (clear_face_cache_count % 50 == 0 |
9285 | && FRAME_WINDOW_P (f)) | |
9286 | clear_image_cache (f, 0); | |
ae02e06a | 9287 | #endif /* HAVE_WINDOW_SYSTEM */ |
bb336f8d | 9288 | |
5f5c8ee5 GM |
9289 | /* Mark all the scroll bars to be removed; we'll redeem |
9290 | the ones we want when we redisplay their windows. */ | |
9769686d | 9291 | if (condemn_scroll_bars_hook) |
504454e8 | 9292 | condemn_scroll_bars_hook (f); |
30c566e4 | 9293 | |
f21ef775 | 9294 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 9295 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 9296 | |
5f5c8ee5 GM |
9297 | /* Any scroll bars which redisplay_windows should have |
9298 | nuked should now go away. */ | |
9769686d | 9299 | if (judge_scroll_bars_hook) |
504454e8 | 9300 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
9301 | |
9302 | /* If fonts changed, display again. */ | |
b60c9653 RS |
9303 | /* ??? rms: I suspect it is a mistake to jump all the way |
9304 | back to retry here. It should just retry this frame. */ | |
bd9d0f3f GM |
9305 | if (fonts_changed_p) |
9306 | goto retry; | |
2311178e | 9307 | |
bd9d0f3f GM |
9308 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
9309 | { | |
9310 | /* See if we have to hscroll. */ | |
9311 | if (hscroll_windows (f->root_window)) | |
9312 | goto retry; | |
9313 | ||
9314 | /* Prevent various kinds of signals during display | |
9315 | update. stdio is not robust about handling | |
9316 | signals, which can cause an apparent I/O | |
9317 | error. */ | |
9318 | if (interrupt_input) | |
9319 | unrequest_sigio (); | |
aac2d8b2 | 9320 | STOP_POLLING; |
bd9d0f3f GM |
9321 | |
9322 | /* Update the display. */ | |
9323 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
9324 | pause |= update_frame (f, 0, 0); | |
9325 | if (pause) | |
9326 | break; | |
9327 | ||
0528abe1 GM |
9328 | if (n == size) |
9329 | { | |
9330 | int nbytes = size * sizeof *updated; | |
9331 | struct frame **p = (struct frame **) alloca (2 * nbytes); | |
9332 | bcopy (updated, p, nbytes); | |
9333 | size *= 2; | |
9334 | } | |
2311178e | 9335 | |
0528abe1 | 9336 | updated[n++] = f; |
bd9d0f3f | 9337 | } |
9769686d | 9338 | } |
30c566e4 | 9339 | } |
0528abe1 GM |
9340 | |
9341 | /* Do the mark_window_display_accurate after all windows have | |
9342 | been redisplayed because this call resets flags in buffers | |
9343 | which are needed for proper redisplay. */ | |
9344 | for (i = 0; i < n; ++i) | |
9345 | { | |
9346 | struct frame *f = updated[i]; | |
9347 | mark_window_display_accurate (f->root_window, 1); | |
9348 | if (frame_up_to_date_hook) | |
9349 | frame_up_to_date_hook (f); | |
9350 | } | |
a2889657 | 9351 | } |
bd9d0f3f GM |
9352 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
9353 | { | |
9354 | Lisp_Object mini_window; | |
9355 | struct frame *mini_frame; | |
5f5c8ee5 | 9356 | |
82a7ab23 | 9357 | displayed_buffer = XBUFFER (XWINDOW (selected_window)->buffer); |
7033d6df RS |
9358 | /* Use list_of_error, not Qerror, so that |
9359 | we catch only errors and don't run the debugger. */ | |
9360 | internal_condition_case_1 (redisplay_window_1, selected_window, | |
9361 | list_of_error, | |
82a7ab23 | 9362 | redisplay_window_error); |
2311178e | 9363 | |
bd9d0f3f | 9364 | /* Compare desired and current matrices, perform output. */ |
7d0393cf | 9365 | |
26683087 | 9366 | update: |
bd9d0f3f GM |
9367 | /* If fonts changed, display again. */ |
9368 | if (fonts_changed_p) | |
92a90e89 | 9369 | goto retry; |
a2889657 | 9370 | |
bd9d0f3f GM |
9371 | /* Prevent various kinds of signals during display update. |
9372 | stdio is not robust about handling signals, | |
9373 | which can cause an apparent I/O error. */ | |
9374 | if (interrupt_input) | |
9375 | unrequest_sigio (); | |
aac2d8b2 | 9376 | STOP_POLLING; |
1af9f229 | 9377 | |
bd9d0f3f | 9378 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 9379 | { |
92a90e89 GM |
9380 | if (hscroll_windows (selected_window)) |
9381 | goto retry; | |
2311178e | 9382 | |
5f5c8ee5 | 9383 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 9384 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 9385 | } |
d724d989 | 9386 | |
8de2d90b | 9387 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
9388 | function. If the echo area is on another frame, that may |
9389 | have put text on a frame other than the selected one, so the | |
9390 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 9391 | it here. */ |
bd9d0f3f GM |
9392 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
9393 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
2311178e | 9394 | |
bd9d0f3f GM |
9395 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
9396 | { | |
9397 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
9398 | pause |= update_frame (mini_frame, 0, 0); | |
9399 | if (!pause && hscroll_windows (mini_window)) | |
9400 | goto retry; | |
9401 | } | |
6e8290aa | 9402 | } |
a2889657 | 9403 | |
5f5c8ee5 GM |
9404 | /* If display was paused because of pending input, make sure we do a |
9405 | thorough update the next time. */ | |
a2889657 JB |
9406 | if (pause) |
9407 | { | |
5f5c8ee5 GM |
9408 | /* Prevent the optimization at the beginning of |
9409 | redisplay_internal that tries a single-line update of the | |
9410 | line containing the cursor in the selected window. */ | |
9411 | CHARPOS (this_line_start_pos) = 0; | |
9412 | ||
9413 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 9414 | if (!NILP (last_arrow_position)) |
a2889657 JB |
9415 | { |
9416 | last_arrow_position = Qt; | |
9417 | last_arrow_string = Qt; | |
9418 | } | |
2311178e | 9419 | |
5f5c8ee5 GM |
9420 | /* If we pause after scrolling, some rows in the current |
9421 | matrices of some windows are not valid. */ | |
9422 | if (!WINDOW_FULL_WIDTH_P (w) | |
9423 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
9424 | update_mode_lines = 1; |
9425 | } | |
43c09969 | 9426 | else |
a2889657 | 9427 | { |
43c09969 | 9428 | if (!consider_all_windows_p) |
a2889657 | 9429 | { |
43c09969 GM |
9430 | /* This has already been done above if |
9431 | consider_all_windows_p is set. */ | |
9432 | mark_window_display_accurate_1 (w, 1); | |
2311178e | 9433 | |
927c5b3b GM |
9434 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
9435 | last_arrow_string = Voverlay_arrow_string; | |
2311178e | 9436 | |
efc63ef0 | 9437 | if (frame_up_to_date_hook != 0) |
43c09969 | 9438 | frame_up_to_date_hook (sf); |
a2889657 | 9439 | } |
15e26c76 | 9440 | |
a2889657 JB |
9441 | update_mode_lines = 0; |
9442 | windows_or_buffers_changed = 0; | |
5fb96e96 | 9443 | cursor_type_changed = 0; |
a2889657 JB |
9444 | } |
9445 | ||
5f5c8ee5 GM |
9446 | /* Start SIGIO interrupts coming again. Having them off during the |
9447 | code above makes it less likely one will discard output, but not | |
9448 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 9449 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
9450 | if (interrupt_input) |
9451 | request_sigio (); | |
aac2d8b2 | 9452 | RESUME_POLLING; |
a2889657 | 9453 | |
5f5c8ee5 GM |
9454 | /* If a frame has become visible which was not before, redisplay |
9455 | again, so that we display it. Expose events for such a frame | |
9456 | (which it gets when becoming visible) don't call the parts of | |
9457 | redisplay constructing glyphs, so simply exposing a frame won't | |
9458 | display anything in this case. So, we have to display these | |
9459 | frames here explicitly. */ | |
11c52c4f RS |
9460 | if (!pause) |
9461 | { | |
9462 | Lisp_Object tail, frame; | |
9463 | int new_count = 0; | |
9464 | ||
9465 | FOR_EACH_FRAME (tail, frame) | |
9466 | { | |
9467 | int this_is_visible = 0; | |
8e83f802 RS |
9468 | |
9469 | if (XFRAME (frame)->visible) | |
9470 | this_is_visible = 1; | |
9471 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
9472 | if (XFRAME (frame)->visible) | |
9473 | this_is_visible = 1; | |
11c52c4f RS |
9474 | |
9475 | if (this_is_visible) | |
9476 | new_count++; | |
9477 | } | |
9478 | ||
89819bdd | 9479 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
9480 | windows_or_buffers_changed++; |
9481 | } | |
9482 | ||
44fa5b1e | 9483 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 9484 | do_pending_window_change (1); |
d8e242fd | 9485 | |
8b32d885 RS |
9486 | /* If we just did a pending size change, or have additional |
9487 | visible frames, redisplay again. */ | |
3c8c72e0 | 9488 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 9489 | goto retry; |
5f5c8ee5 | 9490 | |
1987b083 | 9491 | end_of_redisplay: |
28514cd9 | 9492 | unbind_to (count, Qnil); |
aac2d8b2 | 9493 | RESUME_POLLING; |
a2889657 JB |
9494 | } |
9495 | ||
5f5c8ee5 GM |
9496 | |
9497 | /* Redisplay, but leave alone any recent echo area message unless | |
9498 | another message has been requested in its place. | |
a2889657 JB |
9499 | |
9500 | This is useful in situations where you need to redisplay but no | |
9501 | user action has occurred, making it inappropriate for the message | |
9502 | area to be cleared. See tracking_off and | |
9bf76936 GM |
9503 | wait_reading_process_input for examples of these situations. |
9504 | ||
9505 | FROM_WHERE is an integer saying from where this function was | |
9506 | called. This is useful for debugging. */ | |
a2889657 | 9507 | |
8991bb31 | 9508 | void |
9bf76936 GM |
9509 | redisplay_preserve_echo_area (from_where) |
9510 | int from_where; | |
a2889657 | 9511 | { |
9bf76936 GM |
9512 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
9513 | ||
c6e89d6c | 9514 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 9515 | { |
c6e89d6c GM |
9516 | /* We have a previously displayed message, but no current |
9517 | message. Redisplay the previous message. */ | |
9518 | display_last_displayed_message_p = 1; | |
e9874cee | 9519 | redisplay_internal (1); |
c6e89d6c | 9520 | display_last_displayed_message_p = 0; |
a2889657 JB |
9521 | } |
9522 | else | |
e9874cee | 9523 | redisplay_internal (1); |
a2889657 JB |
9524 | } |
9525 | ||
5f5c8ee5 | 9526 | |
28514cd9 | 9527 | /* Function registered with record_unwind_protect in |
acfca545 RS |
9528 | redisplay_internal. Reset redisplaying_p to the value it had |
9529 | before redisplay_internal was called, and clear | |
26683087 | 9530 | prevent_freeing_realized_faces_p. */ |
28514cd9 GM |
9531 | |
9532 | static Lisp_Object | |
9533 | unwind_redisplay (old_redisplaying_p) | |
9534 | Lisp_Object old_redisplaying_p; | |
9535 | { | |
9536 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 9537 | return Qnil; |
28514cd9 GM |
9538 | } |
9539 | ||
9540 | ||
43c09969 GM |
9541 | /* Mark the display of window W as accurate or inaccurate. If |
9542 | ACCURATE_P is non-zero mark display of W as accurate. If | |
9543 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
9544 | redisplay_internal is called. */ | |
5f5c8ee5 | 9545 | |
43c09969 GM |
9546 | static void |
9547 | mark_window_display_accurate_1 (w, accurate_p) | |
9548 | struct window *w; | |
5f5c8ee5 | 9549 | int accurate_p; |
a2889657 | 9550 | { |
43c09969 | 9551 | if (BUFFERP (w->buffer)) |
a2889657 | 9552 | { |
43c09969 | 9553 | struct buffer *b = XBUFFER (w->buffer); |
2311178e | 9554 | |
43c09969 GM |
9555 | w->last_modified |
9556 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
9557 | w->last_overlay_modified | |
9558 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
9559 | w->last_had_star | |
9560 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 9561 | |
43c09969 | 9562 | if (accurate_p) |
bd66d1ba | 9563 | { |
43c09969 GM |
9564 | b->clip_changed = 0; |
9565 | b->prevent_redisplay_optimizations_p = 0; | |
9566 | ||
9567 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
9568 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
9569 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
9570 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
2311178e | 9571 | |
43c09969 GM |
9572 | w->current_matrix->buffer = b; |
9573 | w->current_matrix->begv = BUF_BEGV (b); | |
9574 | w->current_matrix->zv = BUF_ZV (b); | |
2311178e | 9575 | |
43c09969 GM |
9576 | w->last_cursor = w->cursor; |
9577 | w->last_cursor_off_p = w->cursor_off_p; | |
2311178e | 9578 | |
43c09969 GM |
9579 | if (w == XWINDOW (selected_window)) |
9580 | w->last_point = make_number (BUF_PT (b)); | |
9581 | else | |
9582 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 9583 | } |
43c09969 | 9584 | } |
bd66d1ba | 9585 | |
43c09969 GM |
9586 | if (accurate_p) |
9587 | { | |
d2f84654 | 9588 | w->window_end_valid = w->buffer; |
99332eb6 | 9589 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 GM |
9590 | xassert (XINT (w->window_end_vpos) |
9591 | < (XINT (w->height) | |
9592 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); | |
99332eb6 | 9593 | #endif |
a2889657 | 9594 | w->update_mode_line = Qnil; |
43c09969 GM |
9595 | } |
9596 | } | |
9597 | ||
9598 | ||
9599 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
9600 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
9601 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
9602 | be redisplayed the next time redisplay_internal is called. */ | |
9603 | ||
9604 | void | |
9605 | mark_window_display_accurate (window, accurate_p) | |
9606 | Lisp_Object window; | |
9607 | int accurate_p; | |
9608 | { | |
9609 | struct window *w; | |
2311178e | 9610 | |
43c09969 GM |
9611 | for (; !NILP (window); window = w->next) |
9612 | { | |
9613 | w = XWINDOW (window); | |
9614 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 9615 | |
265a9e55 | 9616 | if (!NILP (w->vchild)) |
5f5c8ee5 | 9617 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 9618 | if (!NILP (w->hchild)) |
5f5c8ee5 | 9619 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
9620 | } |
9621 | ||
5f5c8ee5 | 9622 | if (accurate_p) |
a2889657 | 9623 | { |
d45de95b | 9624 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
9625 | last_arrow_string = Voverlay_arrow_string; |
9626 | } | |
9627 | else | |
9628 | { | |
5f5c8ee5 GM |
9629 | /* Force a thorough redisplay the next time by setting |
9630 | last_arrow_position and last_arrow_string to t, which is | |
4b41cebb | 9631 | unequal to any useful value of Voverlay_arrow_... */ |
a2889657 JB |
9632 | last_arrow_position = Qt; |
9633 | last_arrow_string = Qt; | |
9634 | } | |
9635 | } | |
5f5c8ee5 GM |
9636 | |
9637 | ||
9638 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
9639 | C. Since a display table doesn't have any parent, we don't have to | |
9640 | follow parent. Do not call this function directly but use the | |
9641 | macro DISP_CHAR_VECTOR. */ | |
9642 | ||
9643 | Lisp_Object | |
9644 | disp_char_vector (dp, c) | |
9645 | struct Lisp_Char_Table *dp; | |
9646 | int c; | |
9647 | { | |
9648 | int code[4], i; | |
9649 | Lisp_Object val; | |
9650 | ||
9651 | if (SINGLE_BYTE_CHAR_P (c)) | |
9652 | return (dp->contents[c]); | |
2311178e | 9653 | |
c5924f47 | 9654 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
9655 | if (code[1] < 32) |
9656 | code[1] = -1; | |
9657 | else if (code[2] < 32) | |
9658 | code[2] = -1; | |
2311178e | 9659 | |
5f5c8ee5 GM |
9660 | /* Here, the possible range of code[0] (== charset ID) is |
9661 | 128..max_charset. Since the top level char table contains data | |
9662 | for multibyte characters after 256th element, we must increment | |
9663 | code[0] by 128 to get a correct index. */ | |
9664 | code[0] += 128; | |
9665 | code[3] = -1; /* anchor */ | |
9666 | ||
9667 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
9668 | { | |
9669 | val = dp->contents[code[i]]; | |
9670 | if (!SUB_CHAR_TABLE_P (val)) | |
9671 | return (NILP (val) ? dp->defalt : val); | |
9672 | } | |
2311178e | 9673 | |
5f5c8ee5 GM |
9674 | /* Here, val is a sub char table. We return the default value of |
9675 | it. */ | |
9676 | return (dp->defalt); | |
9677 | } | |
9678 | ||
9679 | ||
a2889657 | 9680 | \f |
5f5c8ee5 GM |
9681 | /*********************************************************************** |
9682 | Window Redisplay | |
9683 | ***********************************************************************/ | |
a2725ab2 | 9684 | |
5f5c8ee5 | 9685 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
9686 | |
9687 | static void | |
5f5c8ee5 GM |
9688 | redisplay_windows (window) |
9689 | Lisp_Object window; | |
90adcf20 | 9690 | { |
5f5c8ee5 GM |
9691 | while (!NILP (window)) |
9692 | { | |
9693 | struct window *w = XWINDOW (window); | |
2311178e | 9694 | |
5f5c8ee5 GM |
9695 | if (!NILP (w->hchild)) |
9696 | redisplay_windows (w->hchild); | |
9697 | else if (!NILP (w->vchild)) | |
9698 | redisplay_windows (w->vchild); | |
9699 | else | |
82a7ab23 RS |
9700 | { |
9701 | displayed_buffer = XBUFFER (w->buffer); | |
7033d6df RS |
9702 | /* Use list_of_error, not Qerror, so that |
9703 | we catch only errors and don't run the debugger. */ | |
2311178e | 9704 | internal_condition_case_1 (redisplay_window_0, window, |
7033d6df | 9705 | list_of_error, |
82a7ab23 RS |
9706 | redisplay_window_error); |
9707 | } | |
a2725ab2 | 9708 | |
5f5c8ee5 GM |
9709 | window = w->next; |
9710 | } | |
9711 | } | |
9712 | ||
82a7ab23 RS |
9713 | static Lisp_Object |
9714 | redisplay_window_error () | |
9715 | { | |
9716 | displayed_buffer->display_error_modiff = BUF_MODIFF (displayed_buffer); | |
9717 | return Qnil; | |
9718 | } | |
9719 | ||
9720 | static Lisp_Object | |
9721 | redisplay_window_0 (window) | |
9722 | Lisp_Object window; | |
9723 | { | |
9724 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9725 | redisplay_window (window, 0); | |
9726 | return Qnil; | |
9727 | } | |
5f5c8ee5 | 9728 | |
82a7ab23 RS |
9729 | static Lisp_Object |
9730 | redisplay_window_1 (window) | |
9731 | Lisp_Object window; | |
9732 | { | |
9733 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9734 | redisplay_window (window, 1); | |
9735 | return Qnil; | |
9736 | } | |
9737 | \f | |
bc6371a6 KH |
9738 | |
9739 | /* Increment GLYPH until it reaches END or CONDITION fails while | |
9740 | adding (GLYPH)->pixel_width to X. */ | |
9741 | ||
9742 | #define SKIP_GLYPHS(glyph, end, x, condition) \ | |
9743 | do \ | |
9744 | { \ | |
9745 | (x) += (glyph)->pixel_width; \ | |
9746 | ++(glyph); \ | |
9747 | } \ | |
9748 | while ((glyph) < (end) && (condition)) | |
9749 | ||
9750 | ||
5f5c8ee5 GM |
9751 | /* Set cursor position of W. PT is assumed to be displayed in ROW. |
9752 | DELTA is the number of bytes by which positions recorded in ROW | |
9753 | differ from current buffer positions. */ | |
9754 | ||
9755 | void | |
9756 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
9757 | struct window *w; | |
9758 | struct glyph_row *row; | |
9759 | struct glyph_matrix *matrix; | |
9760 | int delta, delta_bytes, dy, dvpos; | |
9761 | { | |
9762 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
9763 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
ae73dc1c KH |
9764 | /* The first glyph that starts a sequence of glyphs from string. */ |
9765 | struct glyph *string_start; | |
9766 | /* The X coordinate of string_start. */ | |
9767 | int string_start_x; | |
9768 | /* The last known character position. */ | |
9769 | int last_pos = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9770 | /* The last known character position before string_start. */ | |
9771 | int string_before_pos; | |
5f5c8ee5 GM |
9772 | int x = row->x; |
9773 | int pt_old = PT - delta; | |
9774 | ||
9775 | /* Skip over glyphs not having an object at the start of the row. | |
9776 | These are special glyphs like truncation marks on terminal | |
9777 | frames. */ | |
9778 | if (row->displays_text_p) | |
9779 | while (glyph < end | |
6fc556fd | 9780 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
9781 | && glyph->charpos < 0) |
9782 | { | |
9783 | x += glyph->pixel_width; | |
9784 | ++glyph; | |
9785 | } | |
9786 | ||
ae73dc1c | 9787 | string_start = NULL; |
5f5c8ee5 | 9788 | while (glyph < end |
6fc556fd | 9789 | && !INTEGERP (glyph->object) |
5f5c8ee5 | 9790 | && (!BUFFERP (glyph->object) |
ae73dc1c | 9791 | || (last_pos = glyph->charpos) < pt_old)) |
5f5c8ee5 | 9792 | { |
ae73dc1c KH |
9793 | if (! STRINGP (glyph->object)) |
9794 | { | |
9795 | string_start = NULL; | |
9796 | x += glyph->pixel_width; | |
9797 | ++glyph; | |
9798 | } | |
9799 | else | |
9800 | { | |
9801 | string_before_pos = last_pos; | |
9802 | string_start = glyph; | |
9803 | string_start_x = x; | |
9804 | /* Skip all glyphs from string. */ | |
bc6371a6 | 9805 | SKIP_GLYPHS (glyph, end, x, STRINGP (glyph->object)); |
ae73dc1c KH |
9806 | } |
9807 | } | |
9808 | ||
9809 | if (string_start | |
9810 | && (glyph == end || !BUFFERP (glyph->object) || last_pos > pt_old)) | |
9811 | { | |
9812 | /* We may have skipped over point because the previous glyphs | |
9813 | are from string. As there's no easy way to know the | |
9814 | character position of the current glyph, find the correct | |
9815 | glyph on point by scanning from string_start again. */ | |
bc6371a6 KH |
9816 | Lisp_Object limit; |
9817 | Lisp_Object string; | |
9818 | int pos; | |
ae73dc1c | 9819 | |
bc6371a6 KH |
9820 | limit = make_number (pt_old + 1); |
9821 | end = glyph; | |
ae73dc1c KH |
9822 | glyph = string_start; |
9823 | x = string_start_x; | |
bc6371a6 KH |
9824 | string = glyph->object; |
9825 | pos = string_buffer_position (w, string, string_before_pos); | |
9826 | /* If STRING is from overlay, LAST_POS == 0. We skip such glyphs | |
9827 | because we always put cursor after overlay strings. */ | |
9828 | while (pos == 0 && glyph < end) | |
ae73dc1c | 9829 | { |
bc6371a6 KH |
9830 | string = glyph->object; |
9831 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
9832 | if (glyph < end) | |
9833 | pos = string_buffer_position (w, glyph->object, string_before_pos); | |
9834 | } | |
9835 | ||
9836 | while (glyph < end) | |
9837 | { | |
9838 | pos = XINT (Fnext_single_char_property_change | |
9839 | (make_number (pos), Qdisplay, Qnil, limit)); | |
9840 | if (pos > pt_old) | |
9841 | break; | |
ae73dc1c | 9842 | /* Skip glyphs from the same string. */ |
bc6371a6 KH |
9843 | string = glyph->object; |
9844 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
9845 | /* Skip glyphs from an overlay. */ | |
9846 | while (glyph < end | |
9847 | && ! string_buffer_position (w, glyph->object, pos)) | |
ae73dc1c | 9848 | { |
bc6371a6 KH |
9849 | string = glyph->object; |
9850 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
ae73dc1c | 9851 | } |
ae73dc1c | 9852 | } |
5f5c8ee5 GM |
9853 | } |
9854 | ||
9855 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
9856 | w->cursor.x = x; | |
9857 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
9858 | w->cursor.y = row->y + dy; | |
9859 | ||
9860 | if (w == XWINDOW (selected_window)) | |
9861 | { | |
9862 | if (!row->continued_p | |
9863 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
9864 | && row->x == 0) | |
9865 | { | |
9866 | this_line_buffer = XBUFFER (w->buffer); | |
2311178e | 9867 | |
5f5c8ee5 GM |
9868 | CHARPOS (this_line_start_pos) |
9869 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9870 | BYTEPOS (this_line_start_pos) | |
9871 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
2311178e | 9872 | |
5f5c8ee5 GM |
9873 | CHARPOS (this_line_end_pos) |
9874 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
9875 | BYTEPOS (this_line_end_pos) | |
9876 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
2311178e | 9877 | |
5f5c8ee5 GM |
9878 | this_line_y = w->cursor.y; |
9879 | this_line_pixel_height = row->height; | |
9880 | this_line_vpos = w->cursor.vpos; | |
9881 | this_line_start_x = row->x; | |
9882 | } | |
9883 | else | |
9884 | CHARPOS (this_line_start_pos) = 0; | |
9885 | } | |
9886 | } | |
9887 | ||
9888 | ||
9889 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
9890 | start STARTP. Sets the window start of WINDOW to that position. |
9891 | ||
9892 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
9893 | |
9894 | static INLINE struct text_pos | |
9895 | run_window_scroll_functions (window, startp) | |
9896 | Lisp_Object window; | |
9897 | struct text_pos startp; | |
9898 | { | |
9899 | struct window *w = XWINDOW (window); | |
9900 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
9901 | |
9902 | if (current_buffer != XBUFFER (w->buffer)) | |
9903 | abort (); | |
9904 | ||
5f5c8ee5 GM |
9905 | if (!NILP (Vwindow_scroll_functions)) |
9906 | { | |
2311178e | 9907 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
5f5c8ee5 GM |
9908 | make_number (CHARPOS (startp))); |
9909 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
9910 | /* In case the hook functions switch buffers. */ |
9911 | if (current_buffer != XBUFFER (w->buffer)) | |
9912 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 9913 | } |
90adcf20 | 9914 | |
5f5c8ee5 GM |
9915 | return startp; |
9916 | } | |
9917 | ||
9918 | ||
ddf6b9a3 RS |
9919 | /* Make sure the line containing the cursor is fully visible. |
9920 | A value of 1 means there is nothing to be done. | |
9921 | (Either the line is fully visible, or it cannot be made so, | |
9922 | or we cannot tell.) | |
9923 | A value of 0 means the caller should do scrolling | |
9924 | as if point had gone off the screen. */ | |
5f5c8ee5 | 9925 | |
cb617e7c | 9926 | static int |
5f5c8ee5 GM |
9927 | make_cursor_line_fully_visible (w) |
9928 | struct window *w; | |
9929 | { | |
9930 | struct glyph_matrix *matrix; | |
9931 | struct glyph_row *row; | |
478d746b | 9932 | int window_height; |
2311178e | 9933 | |
5f5c8ee5 GM |
9934 | /* It's not always possible to find the cursor, e.g, when a window |
9935 | is full of overlay strings. Don't do anything in that case. */ | |
9936 | if (w->cursor.vpos < 0) | |
cb617e7c | 9937 | return 1; |
2311178e | 9938 | |
5f5c8ee5 GM |
9939 | matrix = w->desired_matrix; |
9940 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
9941 | ||
acda20e1 | 9942 | /* If the cursor row is not partially visible, there's nothing to do. */ |
b28cb6ed | 9943 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
cb617e7c | 9944 | return 1; |
b28cb6ed GM |
9945 | |
9946 | /* If the row the cursor is in is taller than the window's height, | |
9947 | it's not clear what to do, so do nothing. */ | |
9948 | window_height = window_box_height (w); | |
9949 | if (row->height >= window_height) | |
cb617e7c | 9950 | return 1; |
b28cb6ed | 9951 | |
ddf6b9a3 RS |
9952 | return 0; |
9953 | ||
9954 | #if 0 | |
9955 | /* This code used to try to scroll the window just enough to make | |
9956 | the line visible. It returned 0 to say that the caller should | |
9957 | allocate larger glyph matrices. */ | |
9958 | ||
b28cb6ed | 9959 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) |
5f5c8ee5 GM |
9960 | { |
9961 | int dy = row->height - row->visible_height; | |
9962 | w->vscroll = 0; | |
9963 | w->cursor.y += dy; | |
9964 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9965 | } | |
b28cb6ed | 9966 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
9967 | { |
9968 | int dy = - (row->height - row->visible_height); | |
9969 | w->vscroll = dy; | |
9970 | w->cursor.y += dy; | |
9971 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9972 | } | |
2311178e | 9973 | |
5f5c8ee5 GM |
9974 | /* When we change the cursor y-position of the selected window, |
9975 | change this_line_y as well so that the display optimization for | |
9976 | the cursor line of the selected window in redisplay_internal uses | |
9977 | the correct y-position. */ | |
9978 | if (w == XWINDOW (selected_window)) | |
9979 | this_line_y = w->cursor.y; | |
cb617e7c GM |
9980 | |
9981 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
9982 | redisplay with larger matrices. */ | |
9983 | if (matrix->nrows < required_matrix_height (w)) | |
9984 | { | |
9985 | fonts_changed_p = 1; | |
9986 | return 0; | |
9987 | } | |
9988 | ||
9989 | return 1; | |
ddf6b9a3 | 9990 | #endif /* 0 */ |
5f5c8ee5 GM |
9991 | } |
9992 | ||
9993 | ||
9994 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
9995 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
9996 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
9997 | in redisplay_window to bring a partially visible line into view in | |
9998 | the case that only the cursor has moved. | |
9999 | ||
03b0a4b4 RS |
10000 | LAST_LINE_MISFIT should be nonzero if we're scrolling because the |
10001 | last screen line's vertical height extends past the end of the screen. | |
10002 | ||
5f5c8ee5 GM |
10003 | Value is |
10004 | ||
10005 | 1 if scrolling succeeded | |
2311178e | 10006 | |
5f5c8ee5 | 10007 | 0 if scrolling didn't find point. |
2311178e | 10008 | |
5f5c8ee5 GM |
10009 | -1 if new fonts have been loaded so that we must interrupt |
10010 | redisplay, adjust glyph matrices, and try again. */ | |
10011 | ||
cb617e7c GM |
10012 | enum |
10013 | { | |
10014 | SCROLLING_SUCCESS, | |
10015 | SCROLLING_FAILED, | |
10016 | SCROLLING_NEED_LARGER_MATRICES | |
10017 | }; | |
10018 | ||
5f5c8ee5 GM |
10019 | static int |
10020 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
03b0a4b4 | 10021 | scroll_step, temp_scroll_step, last_line_misfit) |
5f5c8ee5 GM |
10022 | Lisp_Object window; |
10023 | int just_this_one_p; | |
31ade731 | 10024 | EMACS_INT scroll_conservatively, scroll_step; |
5f5c8ee5 | 10025 | int temp_scroll_step; |
03b0a4b4 | 10026 | int last_line_misfit; |
5f5c8ee5 GM |
10027 | { |
10028 | struct window *w = XWINDOW (window); | |
10029 | struct frame *f = XFRAME (w->frame); | |
10030 | struct text_pos scroll_margin_pos; | |
10031 | struct text_pos pos; | |
10032 | struct text_pos startp; | |
10033 | struct it it; | |
10034 | Lisp_Object window_end; | |
10035 | int this_scroll_margin; | |
10036 | int dy = 0; | |
10037 | int scroll_max; | |
b8a63ccb | 10038 | int rc; |
5f5c8ee5 GM |
10039 | int amount_to_scroll = 0; |
10040 | Lisp_Object aggressive; | |
10041 | int height; | |
03b0a4b4 | 10042 | int end_scroll_margin; |
5f5c8ee5 GM |
10043 | |
10044 | #if GLYPH_DEBUG | |
10045 | debug_method_add (w, "try_scrolling"); | |
78614721 | 10046 | #endif |
5f5c8ee5 GM |
10047 | |
10048 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
2311178e | 10049 | |
5f5c8ee5 GM |
10050 | /* Compute scroll margin height in pixels. We scroll when point is |
10051 | within this distance from the top or bottom of the window. */ | |
10052 | if (scroll_margin > 0) | |
90adcf20 | 10053 | { |
5f5c8ee5 GM |
10054 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
10055 | this_scroll_margin *= CANON_Y_UNIT (f); | |
10056 | } | |
10057 | else | |
10058 | this_scroll_margin = 0; | |
10059 | ||
10060 | /* Compute how much we should try to scroll maximally to bring point | |
10061 | into view. */ | |
0894e696 SM |
10062 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
10063 | scroll_max = max (scroll_step, | |
10064 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
10065 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
10066 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
10067 | /* We're trying to scroll because of aggressive scrolling | |
10068 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
10069 | there should be a variable for this. */ | |
10070 | scroll_max = 10; | |
10071 | else | |
10072 | scroll_max = 0; | |
10073 | scroll_max *= CANON_Y_UNIT (f); | |
10074 | ||
10075 | /* Decide whether we have to scroll down. Start at the window end | |
10076 | and move this_scroll_margin up to find the position of the scroll | |
10077 | margin. */ | |
10078 | window_end = Fwindow_end (window, Qt); | |
03b0a4b4 RS |
10079 | |
10080 | too_near_end: | |
10081 | ||
5f5c8ee5 GM |
10082 | CHARPOS (scroll_margin_pos) = XINT (window_end); |
10083 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
03b0a4b4 RS |
10084 | |
10085 | end_scroll_margin = this_scroll_margin + !!last_line_misfit; | |
10086 | if (end_scroll_margin) | |
5f5c8ee5 GM |
10087 | { |
10088 | start_display (&it, w, scroll_margin_pos); | |
03b0a4b4 | 10089 | move_it_vertically (&it, - end_scroll_margin); |
5f5c8ee5 GM |
10090 | scroll_margin_pos = it.current.pos; |
10091 | } | |
10092 | ||
10093 | if (PT >= CHARPOS (scroll_margin_pos)) | |
10094 | { | |
10095 | int y0; | |
2311178e | 10096 | |
5f5c8ee5 GM |
10097 | /* Point is in the scroll margin at the bottom of the window, or |
10098 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 10099 | |
5f5c8ee5 GM |
10100 | /* Compute the distance from the scroll margin to PT. |
10101 | Give up if the distance is greater than scroll_max. */ | |
10102 | start_display (&it, w, scroll_margin_pos); | |
10103 | y0 = it.current_y; | |
10104 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10105 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
539e92ad GM |
10106 | |
10107 | /* To make point visible, we have to move the window start | |
10108 | down so that the line the cursor is in is visible, which | |
10109 | means we have to add in the height of the cursor line. */ | |
10110 | dy = line_bottom_y (&it) - y0; | |
2311178e | 10111 | |
5f5c8ee5 | 10112 | if (dy > scroll_max) |
cb617e7c | 10113 | return SCROLLING_FAILED; |
2311178e | 10114 | |
5f5c8ee5 GM |
10115 | /* Move the window start down. If scrolling conservatively, |
10116 | move it just enough down to make point visible. If | |
10117 | scroll_step is set, move it down by scroll_step. */ | |
10118 | start_display (&it, w, startp); | |
10119 | ||
10120 | if (scroll_conservatively) | |
03b0a4b4 RS |
10121 | /* Set AMOUNT_TO_SCROLL to at least one line, |
10122 | and at most scroll_conservatively lines. */ | |
e89aaabd | 10123 | amount_to_scroll |
03b0a4b4 RS |
10124 | = min (max (dy, CANON_Y_UNIT (f)), |
10125 | CANON_Y_UNIT (f) * scroll_conservatively); | |
5f5c8ee5 GM |
10126 | else if (scroll_step || temp_scroll_step) |
10127 | amount_to_scroll = scroll_max; | |
10128 | else | |
90adcf20 | 10129 | { |
46226c1d | 10130 | aggressive = current_buffer->scroll_up_aggressively; |
5f5c8ee5 | 10131 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 10132 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
10133 | if (NUMBERP (aggressive)) |
10134 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
10135 | } | |
a2725ab2 | 10136 | |
5f5c8ee5 | 10137 | if (amount_to_scroll <= 0) |
cb617e7c | 10138 | return SCROLLING_FAILED; |
a2725ab2 | 10139 | |
03b0a4b4 RS |
10140 | /* If moving by amount_to_scroll leaves STARTP unchanged, |
10141 | move it down one screen line. */ | |
10142 | ||
5f5c8ee5 | 10143 | move_it_vertically (&it, amount_to_scroll); |
03b0a4b4 RS |
10144 | if (CHARPOS (it.current.pos) == CHARPOS (startp)) |
10145 | move_it_by_lines (&it, 1, 1); | |
5f5c8ee5 GM |
10146 | startp = it.current.pos; |
10147 | } | |
10148 | else | |
10149 | { | |
10150 | /* See if point is inside the scroll margin at the top of the | |
10151 | window. */ | |
10152 | scroll_margin_pos = startp; | |
10153 | if (this_scroll_margin) | |
10154 | { | |
10155 | start_display (&it, w, startp); | |
10156 | move_it_vertically (&it, this_scroll_margin); | |
10157 | scroll_margin_pos = it.current.pos; | |
10158 | } | |
10159 | ||
10160 | if (PT < CHARPOS (scroll_margin_pos)) | |
10161 | { | |
10162 | /* Point is in the scroll margin at the top of the window or | |
10163 | above what is displayed in the window. */ | |
10164 | int y0; | |
2311178e | 10165 | |
5f5c8ee5 GM |
10166 | /* Compute the vertical distance from PT to the scroll |
10167 | margin position. Give up if distance is greater than | |
10168 | scroll_max. */ | |
10169 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
10170 | start_display (&it, w, pos); | |
10171 | y0 = it.current_y; | |
10172 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
10173 | it.last_visible_y, -1, | |
10174 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10175 | dy = it.current_y - y0; | |
10176 | if (dy > scroll_max) | |
cb617e7c | 10177 | return SCROLLING_FAILED; |
2311178e | 10178 | |
5f5c8ee5 GM |
10179 | /* Compute new window start. */ |
10180 | start_display (&it, w, startp); | |
2311178e | 10181 | |
5f5c8ee5 | 10182 | if (scroll_conservatively) |
0894e696 SM |
10183 | amount_to_scroll = |
10184 | max (dy, CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
10185 | else if (scroll_step || temp_scroll_step) |
10186 | amount_to_scroll = scroll_max; | |
538f13d4 | 10187 | else |
5f5c8ee5 | 10188 | { |
46226c1d | 10189 | aggressive = current_buffer->scroll_down_aggressively; |
5f5c8ee5 | 10190 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 10191 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
10192 | if (NUMBERP (aggressive)) |
10193 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
10194 | } | |
a2725ab2 | 10195 | |
5f5c8ee5 | 10196 | if (amount_to_scroll <= 0) |
cb617e7c | 10197 | return SCROLLING_FAILED; |
2311178e | 10198 | |
5f5c8ee5 GM |
10199 | move_it_vertically (&it, - amount_to_scroll); |
10200 | startp = it.current.pos; | |
90adcf20 RS |
10201 | } |
10202 | } | |
a2889657 | 10203 | |
5f5c8ee5 GM |
10204 | /* Run window scroll functions. */ |
10205 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 10206 | |
5f5c8ee5 GM |
10207 | /* Display the window. Give up if new fonts are loaded, or if point |
10208 | doesn't appear. */ | |
10209 | if (!try_window (window, startp)) | |
cb617e7c | 10210 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
10211 | else if (w->cursor.vpos < 0) |
10212 | { | |
10213 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 10214 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
10215 | } |
10216 | else | |
10217 | { | |
10218 | /* Maybe forget recorded base line for line number display. */ | |
2311178e | 10219 | if (!just_this_one_p |
5f5c8ee5 | 10220 | || current_buffer->clip_changed |
9142dd5b | 10221 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 | 10222 | w->base_line_number = Qnil; |
2311178e | 10223 | |
ddf6b9a3 RS |
10224 | /* If cursor ends up on a partially visible line, |
10225 | treat that as being off the bottom of the screen. */ | |
10226 | if (! make_cursor_line_fully_visible (w)) | |
ef3c2c73 RS |
10227 | { |
10228 | clear_glyph_matrix (w->desired_matrix); | |
03b0a4b4 | 10229 | last_line_misfit = 1; |
ef3c2c73 RS |
10230 | goto too_near_end; |
10231 | } | |
ddf6b9a3 | 10232 | rc = SCROLLING_SUCCESS; |
5f5c8ee5 GM |
10233 | } |
10234 | ||
10235 | return rc; | |
a2889657 JB |
10236 | } |
10237 | ||
5f5c8ee5 GM |
10238 | |
10239 | /* Compute a suitable window start for window W if display of W starts | |
10240 | on a continuation line. Value is non-zero if a new window start | |
10241 | was computed. | |
10242 | ||
10243 | The new window start will be computed, based on W's width, starting | |
10244 | from the start of the continued line. It is the start of the | |
10245 | screen line with the minimum distance from the old start W->start. */ | |
10246 | ||
10247 | static int | |
10248 | compute_window_start_on_continuation_line (w) | |
10249 | struct window *w; | |
1f1ff51d | 10250 | { |
5f5c8ee5 GM |
10251 | struct text_pos pos, start_pos; |
10252 | int window_start_changed_p = 0; | |
1f1ff51d | 10253 | |
5f5c8ee5 | 10254 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 10255 | |
5f5c8ee5 | 10256 | /* If window start is on a continuation line... Window start may be |
2311178e | 10257 | < BEGV in case there's invisible text at the start of the |
5f5c8ee5 GM |
10258 | buffer (M-x rmail, for example). */ |
10259 | if (CHARPOS (start_pos) > BEGV | |
10260 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 10261 | { |
5f5c8ee5 GM |
10262 | struct it it; |
10263 | struct glyph_row *row; | |
f3751a65 GM |
10264 | |
10265 | /* Handle the case that the window start is out of range. */ | |
10266 | if (CHARPOS (start_pos) < BEGV) | |
10267 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
10268 | else if (CHARPOS (start_pos) > ZV) | |
10269 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
2311178e | 10270 | |
5f5c8ee5 GM |
10271 | /* Find the start of the continued line. This should be fast |
10272 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 10273 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
10274 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
10275 | row, DEFAULT_FACE_ID); | |
10276 | reseat_at_previous_visible_line_start (&it); | |
10277 | ||
10278 | /* If the line start is "too far" away from the window start, | |
10279 | say it takes too much time to compute a new window start. */ | |
10280 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
10281 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
10282 | { | |
10283 | int min_distance, distance; | |
2311178e | 10284 | |
5f5c8ee5 GM |
10285 | /* Move forward by display lines to find the new window |
10286 | start. If window width was enlarged, the new start can | |
10287 | be expected to be > the old start. If window width was | |
10288 | decreased, the new window start will be < the old start. | |
10289 | So, we're looking for the display line start with the | |
10290 | minimum distance from the old window start. */ | |
10291 | pos = it.current.pos; | |
10292 | min_distance = INFINITY; | |
10293 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
10294 | distance < min_distance) | |
10295 | { | |
10296 | min_distance = distance; | |
10297 | pos = it.current.pos; | |
10298 | move_it_by_lines (&it, 1, 0); | |
10299 | } | |
2311178e | 10300 | |
5f5c8ee5 GM |
10301 | /* Set the window start there. */ |
10302 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
10303 | window_start_changed_p = 1; | |
10304 | } | |
1f1ff51d | 10305 | } |
2311178e | 10306 | |
5f5c8ee5 | 10307 | return window_start_changed_p; |
1f1ff51d KH |
10308 | } |
10309 | ||
5f5c8ee5 | 10310 | |
1dd5768b | 10311 | /* Try cursor movement in case text has not changed in window WINDOW, |
47589c8c GM |
10312 | with window start STARTP. Value is |
10313 | ||
cb617e7c | 10314 | CURSOR_MOVEMENT_SUCCESS if successful |
2311178e | 10315 | |
cb617e7c GM |
10316 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
10317 | ||
10318 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
10319 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
10320 | we want to scroll as if scroll-step were set to 1. See the code. | |
10321 | ||
10322 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
10323 | which case we have to abort this redisplay, and adjust matrices | |
10324 | first. */ | |
10325 | ||
2311178e | 10326 | enum |
cb617e7c GM |
10327 | { |
10328 | CURSOR_MOVEMENT_SUCCESS, | |
10329 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
10330 | CURSOR_MOVEMENT_MUST_SCROLL, | |
10331 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
10332 | }; | |
47589c8c GM |
10333 | |
10334 | static int | |
10335 | try_cursor_movement (window, startp, scroll_step) | |
10336 | Lisp_Object window; | |
10337 | struct text_pos startp; | |
10338 | int *scroll_step; | |
10339 | { | |
10340 | struct window *w = XWINDOW (window); | |
10341 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 10342 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
2311178e | 10343 | |
69d1f7c9 | 10344 | #if GLYPH_DEBUG |
76cb5e06 GM |
10345 | if (inhibit_try_cursor_movement) |
10346 | return rc; | |
10347 | #endif | |
10348 | ||
47589c8c GM |
10349 | /* Handle case where text has not changed, only point, and it has |
10350 | not moved off the frame. */ | |
10351 | if (/* Point may be in this window. */ | |
10352 | PT >= CHARPOS (startp) | |
47589c8c GM |
10353 | /* Selective display hasn't changed. */ |
10354 | && !current_buffer->clip_changed | |
4db87380 GM |
10355 | /* Function force-mode-line-update is used to force a thorough |
10356 | redisplay. It sets either windows_or_buffers_changed or | |
10357 | update_mode_lines. So don't take a shortcut here for these | |
10358 | cases. */ | |
10359 | && !update_mode_lines | |
10360 | && !windows_or_buffers_changed | |
5fb96e96 | 10361 | && !cursor_type_changed |
2311178e | 10362 | /* Can't use this case if highlighting a region. When a |
47589c8c GM |
10363 | region exists, cursor movement has to do more than just |
10364 | set the cursor. */ | |
10365 | && !(!NILP (Vtransient_mark_mode) | |
10366 | && !NILP (current_buffer->mark_active)) | |
10367 | && NILP (w->region_showing) | |
10368 | && NILP (Vshow_trailing_whitespace) | |
10369 | /* Right after splitting windows, last_point may be nil. */ | |
10370 | && INTEGERP (w->last_point) | |
10371 | /* This code is not used for mini-buffer for the sake of the case | |
10372 | of redisplaying to replace an echo area message; since in | |
10373 | that case the mini-buffer contents per se are usually | |
10374 | unchanged. This code is of no real use in the mini-buffer | |
10375 | since the handling of this_line_start_pos, etc., in redisplay | |
10376 | handles the same cases. */ | |
10377 | && !EQ (window, minibuf_window) | |
10378 | /* When splitting windows or for new windows, it happens that | |
10379 | redisplay is called with a nil window_end_vpos or one being | |
10380 | larger than the window. This should really be fixed in | |
10381 | window.c. I don't have this on my list, now, so we do | |
10382 | approximately the same as the old redisplay code. --gerd. */ | |
10383 | && INTEGERP (w->window_end_vpos) | |
10384 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
10385 | && (FRAME_WINDOW_P (f) | |
10386 | || !MARKERP (Voverlay_arrow_position) | |
10387 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
10388 | { | |
10389 | int this_scroll_margin; | |
8ee5b6a3 | 10390 | struct glyph_row *row = NULL; |
47589c8c GM |
10391 | |
10392 | #if GLYPH_DEBUG | |
10393 | debug_method_add (w, "cursor movement"); | |
10394 | #endif | |
10395 | ||
10396 | /* Scroll if point within this distance from the top or bottom | |
10397 | of the window. This is a pixel value. */ | |
10398 | this_scroll_margin = max (0, scroll_margin); | |
10399 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
10400 | this_scroll_margin *= CANON_Y_UNIT (f); | |
10401 | ||
10402 | /* Start with the row the cursor was displayed during the last | |
10403 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
10404 | if (w->last_cursor.vpos < 0 |
10405 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 10406 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10407 | else |
10408 | { | |
10409 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
10410 | if (row->mode_line_p) | |
10411 | ++row; | |
10412 | if (!row->enabled_p) | |
cb617e7c | 10413 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10414 | } |
10415 | ||
cb617e7c | 10416 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
10417 | { |
10418 | int scroll_p = 0; | |
68c5d1db | 10419 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
2311178e | 10420 | |
47589c8c GM |
10421 | if (PT > XFASTINT (w->last_point)) |
10422 | { | |
10423 | /* Point has moved forward. */ | |
47589c8c GM |
10424 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
10425 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
10426 | { | |
10427 | xassert (row->enabled_p); | |
10428 | ++row; | |
10429 | } | |
10430 | ||
10431 | /* The end position of a row equals the start position | |
10432 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
10433 | display it in the next line. */ |
10434 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
10435 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
10436 | && !cursor_row_p (w, row)) | |
10437 | ++row; | |
47589c8c GM |
10438 | |
10439 | /* If within the scroll margin, scroll. Note that | |
10440 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
10441 | the next line would be drawn, and that | |
10442 | this_scroll_margin can be zero. */ | |
10443 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
10444 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
10445 | /* Line is completely visible last line in window | |
10446 | and PT is to be set in the next line. */ | |
10447 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
10448 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
10449 | && !row->ends_at_zv_p | |
10450 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
10451 | scroll_p = 1; | |
10452 | } | |
10453 | else if (PT < XFASTINT (w->last_point)) | |
10454 | { | |
10455 | /* Cursor has to be moved backward. Note that PT >= | |
10456 | CHARPOS (startp) because of the outer | |
10457 | if-statement. */ | |
10458 | while (!row->mode_line_p | |
10459 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
10460 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
10461 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
10462 | && (row->y > this_scroll_margin | |
10463 | || CHARPOS (startp) == BEGV)) | |
10464 | { | |
10465 | xassert (row->enabled_p); | |
10466 | --row; | |
10467 | } | |
10468 | ||
10469 | /* Consider the following case: Window starts at BEGV, | |
10470 | there is invisible, intangible text at BEGV, so that | |
10471 | display starts at some point START > BEGV. It can | |
10472 | happen that we are called with PT somewhere between | |
10473 | BEGV and START. Try to handle that case. */ | |
10474 | if (row < w->current_matrix->rows | |
10475 | || row->mode_line_p) | |
10476 | { | |
10477 | row = w->current_matrix->rows; | |
10478 | if (row->mode_line_p) | |
10479 | ++row; | |
10480 | } | |
10481 | ||
10482 | /* Due to newlines in overlay strings, we may have to | |
10483 | skip forward over overlay strings. */ | |
68c5d1db GM |
10484 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
10485 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
10486 | && !cursor_row_p (w, row)) | |
47589c8c | 10487 | ++row; |
2311178e | 10488 | |
47589c8c GM |
10489 | /* If within the scroll margin, scroll. */ |
10490 | if (row->y < this_scroll_margin | |
10491 | && CHARPOS (startp) != BEGV) | |
10492 | scroll_p = 1; | |
10493 | } | |
10494 | ||
10495 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
10496 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
10497 | { | |
10498 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 10499 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 10500 | } |
440fc135 | 10501 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c | 10502 | { |
8de4aaf8 GM |
10503 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
10504 | && !row->ends_at_zv_p | |
10505 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 10506 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 10507 | else if (row->height > window_box_height (w)) |
440fc135 | 10508 | { |
8de4aaf8 GM |
10509 | /* If we end up in a partially visible line, let's |
10510 | make it fully visible, except when it's taller | |
10511 | than the window, in which case we can't do much | |
10512 | about it. */ | |
440fc135 | 10513 | *scroll_step = 1; |
cb617e7c | 10514 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
10515 | } |
10516 | else | |
10517 | { | |
10518 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 10519 | if (!make_cursor_line_fully_visible (w)) |
ddf6b9a3 | 10520 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
cb617e7c GM |
10521 | else |
10522 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 10523 | } |
47589c8c GM |
10524 | } |
10525 | else if (scroll_p) | |
cb617e7c | 10526 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10527 | else |
10528 | { | |
10529 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 10530 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
10531 | } |
10532 | } | |
10533 | } | |
10534 | ||
10535 | return rc; | |
10536 | } | |
10537 | ||
10538 | ||
5f5c8ee5 | 10539 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
b60c9653 RS |
10540 | selected_window is redisplayed. |
10541 | ||
10542 | We can return without actually redisplaying the window if | |
10543 | fonts_changed_p is nonzero. In that case, redisplay_internal will | |
10544 | retry. */ | |
90adcf20 | 10545 | |
a2889657 | 10546 | static void |
5f5c8ee5 | 10547 | redisplay_window (window, just_this_one_p) |
a2889657 | 10548 | Lisp_Object window; |
5f5c8ee5 | 10549 | int just_this_one_p; |
a2889657 | 10550 | { |
5f5c8ee5 GM |
10551 | struct window *w = XWINDOW (window); |
10552 | struct frame *f = XFRAME (w->frame); | |
10553 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 10554 | struct buffer *old = current_buffer; |
5f5c8ee5 | 10555 | struct text_pos lpoint, opoint, startp; |
e481f960 | 10556 | int update_mode_line; |
5f5c8ee5 GM |
10557 | int tem; |
10558 | struct it it; | |
10559 | /* Record it now because it's overwritten. */ | |
10560 | int current_matrix_up_to_date_p = 0; | |
c62c1bb5 RS |
10561 | /* This is less strict than current_matrix_up_to_date_p. |
10562 | It indictes that the buffer contents and narrowing are unchanged. */ | |
10563 | int buffer_unchanged_p = 0; | |
5f5c8ee5 | 10564 | int temp_scroll_step = 0; |
331379bf | 10565 | int count = SPECPDL_INDEX (); |
47589c8c | 10566 | int rc; |
ddf6b9a3 | 10567 | int centering_position; |
03b0a4b4 | 10568 | int last_line_misfit = 0; |
a2889657 | 10569 | |
5f5c8ee5 GM |
10570 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
10571 | opoint = lpoint; | |
a2889657 | 10572 | |
5f5c8ee5 GM |
10573 | /* W must be a leaf window here. */ |
10574 | xassert (!NILP (w->buffer)); | |
10575 | #if GLYPH_DEBUG | |
10576 | *w->desired_matrix->method = 0; | |
10577 | #endif | |
2e54982e RS |
10578 | |
10579 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
10580 | |
10581 | reconsider_clip_changes (w, buffer); | |
2311178e TTN |
10582 | |
10583 | /* Has the mode line to be updated? */ | |
5f5c8ee5 GM |
10584 | update_mode_line = (!NILP (w->update_mode_line) |
10585 | || update_mode_lines | |
c62c1bb5 RS |
10586 | || buffer->clip_changed |
10587 | || buffer->prevent_redisplay_optimizations_p); | |
8de2d90b JB |
10588 | |
10589 | if (MINI_WINDOW_P (w)) | |
10590 | { | |
5f5c8ee5 | 10591 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 10592 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
10593 | { |
10594 | if (update_mode_line) | |
10595 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 10596 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
10597 | goto finish_menu_bars; |
10598 | else | |
10599 | /* We've already displayed the echo area glyphs in this window. */ | |
10600 | goto finish_scroll_bars; | |
10601 | } | |
b2b5455d RS |
10602 | else if ((w != XWINDOW (minibuf_window) |
10603 | || minibuf_level == 0) | |
3354fdcf RS |
10604 | /* Quail displays non-mini buffers in minibuffer window. |
10605 | In that case, redisplay the window normally. */ | |
b2b5455d | 10606 | && !NILP (Fmemq (w->buffer, Vminibuffer_list))) |
8de2d90b | 10607 | { |
3354fdcf RS |
10608 | /* W is a mini-buffer window, but it's not active, so clear |
10609 | it. */ | |
5f5c8ee5 GM |
10610 | int yb = window_text_bottom_y (w); |
10611 | struct glyph_row *row; | |
10612 | int y; | |
10613 | ||
10614 | for (y = 0, row = w->desired_matrix->rows; | |
10615 | y < yb; | |
10616 | y += row->height, ++row) | |
10617 | blank_row (w, row, y); | |
88f22aff | 10618 | goto finish_scroll_bars; |
8de2d90b | 10619 | } |
c095a1dd GM |
10620 | |
10621 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 10622 | } |
a2889657 | 10623 | |
5f5c8ee5 GM |
10624 | /* Otherwise set up data on this window; select its buffer and point |
10625 | value. */ | |
6a93695f GM |
10626 | /* Really select the buffer, for the sake of buffer-local |
10627 | variables. */ | |
10628 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
10629 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
10630 | ||
10631 | current_matrix_up_to_date_p | |
10632 | = (!NILP (w->window_end_valid) | |
10633 | && !current_buffer->clip_changed | |
c62c1bb5 | 10634 | && !current_buffer->prevent_redisplay_optimizations_p |
5f5c8ee5 GM |
10635 | && XFASTINT (w->last_modified) >= MODIFF |
10636 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 10637 | |
c62c1bb5 RS |
10638 | buffer_unchanged_p |
10639 | = (!NILP (w->window_end_valid) | |
10640 | && !current_buffer->clip_changed | |
3f1258d0 | 10641 | && XFASTINT (w->last_modified) >= MODIFF |
c62c1bb5 RS |
10642 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); |
10643 | ||
5f5c8ee5 GM |
10644 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
10645 | the window end being valid, so set it to nil there. */ | |
10646 | if (windows_or_buffers_changed) | |
10647 | { | |
10648 | /* If window starts on a continuation line, maybe adjust the | |
10649 | window start in case the window's width changed. */ | |
10650 | if (XMARKER (w->start)->buffer == current_buffer) | |
10651 | compute_window_start_on_continuation_line (w); | |
2311178e | 10652 | |
5f5c8ee5 GM |
10653 | w->window_end_valid = Qnil; |
10654 | } | |
12adba34 | 10655 | |
5f5c8ee5 GM |
10656 | /* Some sanity checks. */ |
10657 | CHECK_WINDOW_END (w); | |
10658 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 10659 | abort (); |
5f5c8ee5 | 10660 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 10661 | abort (); |
a2889657 | 10662 | |
28995e67 RS |
10663 | /* If %c is in mode line, update it if needed. */ |
10664 | if (!NILP (w->column_number_displayed) | |
10665 | /* This alternative quickly identifies a common case | |
10666 | where no change is needed. */ | |
10667 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
10668 | && XFASTINT (w->last_modified) >= MODIFF |
10669 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
10670 | && (XFASTINT (w->column_number_displayed) |
10671 | != (int) current_column ())) /* iftc */ | |
10672 | update_mode_line = 1; | |
28995e67 | 10673 | |
5f5c8ee5 GM |
10674 | /* Count number of windows showing the selected buffer. An indirect |
10675 | buffer counts as its base buffer. */ | |
10676 | if (!just_this_one_p) | |
42640f83 RS |
10677 | { |
10678 | struct buffer *current_base, *window_base; | |
10679 | current_base = current_buffer; | |
10680 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
10681 | if (current_base->base_buffer) | |
10682 | current_base = current_base->base_buffer; | |
10683 | if (window_base->base_buffer) | |
10684 | window_base = window_base->base_buffer; | |
10685 | if (current_base == window_base) | |
10686 | buffer_shared++; | |
10687 | } | |
a2889657 | 10688 | |
5f5c8ee5 GM |
10689 | /* Point refers normally to the selected window. For any other |
10690 | window, set up appropriate value. */ | |
a2889657 JB |
10691 | if (!EQ (window, selected_window)) |
10692 | { | |
12adba34 RS |
10693 | int new_pt = XMARKER (w->pointm)->charpos; |
10694 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 10695 | if (new_pt < BEGV) |
a2889657 | 10696 | { |
f67a0f51 | 10697 | new_pt = BEGV; |
12adba34 RS |
10698 | new_pt_byte = BEGV_BYTE; |
10699 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 10700 | } |
f67a0f51 | 10701 | else if (new_pt > (ZV - 1)) |
a2889657 | 10702 | { |
f67a0f51 | 10703 | new_pt = ZV; |
12adba34 RS |
10704 | new_pt_byte = ZV_BYTE; |
10705 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 10706 | } |
2311178e | 10707 | |
f67a0f51 | 10708 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 10709 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
10710 | } |
10711 | ||
f4faa47c | 10712 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
10713 | have changed, invalidate the width run cache. It's true that |
10714 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
10715 | redisplay goes (non-fatally) haywire when the display table is |
10716 | changed, so why should we worry about doing any better? */ | |
10717 | if (current_buffer->width_run_cache) | |
10718 | { | |
f908610f | 10719 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
10720 | |
10721 | if (! disptab_matches_widthtab (disptab, | |
10722 | XVECTOR (current_buffer->width_table))) | |
10723 | { | |
10724 | invalidate_region_cache (current_buffer, | |
10725 | current_buffer->width_run_cache, | |
10726 | BEG, Z); | |
10727 | recompute_width_table (current_buffer, disptab); | |
10728 | } | |
10729 | } | |
10730 | ||
a2889657 | 10731 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
10732 | if (XMARKER (w->start)->buffer != current_buffer) |
10733 | goto recenter; | |
10734 | ||
5f5c8ee5 | 10735 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 10736 | |
cf0df6ab RS |
10737 | /* If someone specified a new starting point but did not insist, |
10738 | check whether it can be used. */ | |
cfad01b4 GM |
10739 | if (!NILP (w->optional_new_start) |
10740 | && CHARPOS (startp) >= BEGV | |
10741 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
10742 | { |
10743 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
10744 | start_display (&it, w, startp); |
10745 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10746 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10747 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
10748 | w->force_start = Qt; |
10749 | } | |
10750 | ||
8de2d90b | 10751 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 10752 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
10753 | if (!NILP (w->force_start) |
10754 | || w->frozen_window_start_p) | |
a2889657 | 10755 | { |
b60c9653 RS |
10756 | /* We set this later on if we have to adjust point. */ |
10757 | int new_vpos = -1; | |
10758 | ||
e63574d7 | 10759 | w->force_start = Qnil; |
5f5c8ee5 | 10760 | w->vscroll = 0; |
b5174a51 | 10761 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
10762 | |
10763 | /* Forget any recorded base line for line number display. */ | |
c62c1bb5 | 10764 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
10765 | w->base_line_number = Qnil; |
10766 | ||
75c43375 RS |
10767 | /* Redisplay the mode line. Select the buffer properly for that. |
10768 | Also, run the hook window-scroll-functions | |
10769 | because we have scrolled. */ | |
e63574d7 RS |
10770 | /* Note, we do this after clearing force_start because |
10771 | if there's an error, it is better to forget about force_start | |
10772 | than to get into an infinite loop calling the hook functions | |
10773 | and having them get more errors. */ | |
75c43375 RS |
10774 | if (!update_mode_line |
10775 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 10776 | { |
e481f960 RS |
10777 | update_mode_line = 1; |
10778 | w->update_mode_line = Qt; | |
5f5c8ee5 | 10779 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 10780 | } |
2311178e | 10781 | |
ac90c44f GM |
10782 | w->last_modified = make_number (0); |
10783 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
10784 | if (CHARPOS (startp) < BEGV) |
10785 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
10786 | else if (CHARPOS (startp) > ZV) | |
10787 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
2311178e TTN |
10788 | |
10789 | /* Redisplay, then check if cursor has been set during the | |
5f5c8ee5 GM |
10790 | redisplay. Give up if new fonts were loaded. */ |
10791 | if (!try_window (window, startp)) | |
10792 | { | |
10793 | w->force_start = Qt; | |
10794 | clear_glyph_matrix (w->desired_matrix); | |
b60c9653 | 10795 | goto need_larger_matrices; |
5f5c8ee5 GM |
10796 | } |
10797 | ||
9472f927 | 10798 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 10799 | { |
b28cb6ed GM |
10800 | /* If point does not appear, try to move point so it does |
10801 | appear. The desired matrix has been built above, so we | |
10802 | can use it here. */ | |
b60c9653 RS |
10803 | new_vpos = window_box_height (w) / 2; |
10804 | } | |
10805 | ||
10806 | if (!make_cursor_line_fully_visible (w)) | |
10807 | { | |
10808 | /* Point does appear, but on a line partly visible at end of window. | |
10809 | Move it back to a fully-visible line. */ | |
10810 | new_vpos = window_box_height (w); | |
10811 | } | |
10812 | ||
10813 | /* If we need to move point for either of the above reasons, | |
10814 | now actually do it. */ | |
10815 | if (new_vpos >= 0) | |
10816 | { | |
b28cb6ed GM |
10817 | struct glyph_row *row; |
10818 | ||
b28cb6ed | 10819 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); |
b60c9653 | 10820 | while (MATRIX_ROW_BOTTOM_Y (row) < new_vpos) |
5f5c8ee5 GM |
10821 | ++row; |
10822 | ||
10823 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
10824 | MATRIX_ROW_START_BYTEPOS (row)); | |
10825 | ||
90adcf20 | 10826 | if (w != XWINDOW (selected_window)) |
12adba34 | 10827 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
10828 | else if (current_buffer == old) |
10829 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
10830 | ||
10831 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
2311178e | 10832 | |
5f5c8ee5 GM |
10833 | /* If we are highlighting the region, then we just changed |
10834 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
10835 | if (!NILP (Vtransient_mark_mode) |
10836 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 10837 | { |
5f5c8ee5 GM |
10838 | clear_glyph_matrix (w->desired_matrix); |
10839 | if (!try_window (window, startp)) | |
cb617e7c | 10840 | goto need_larger_matrices; |
6f27fa9b | 10841 | } |
a2889657 | 10842 | } |
5f5c8ee5 | 10843 | |
5f5c8ee5 GM |
10844 | #if GLYPH_DEBUG |
10845 | debug_method_add (w, "forced window start"); | |
10846 | #endif | |
a2889657 JB |
10847 | goto done; |
10848 | } | |
10849 | ||
5f5c8ee5 | 10850 | /* Handle case where text has not changed, only point, and it has |
3f029ea0 RS |
10851 | not moved off the frame, and we are not retrying after hscroll. |
10852 | (current_matrix_up_to_date_p is nonzero when retrying.) */ | |
10853 | if (current_matrix_up_to_date_p | |
47589c8c | 10854 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 10855 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 10856 | { |
cb617e7c GM |
10857 | switch (rc) |
10858 | { | |
10859 | case CURSOR_MOVEMENT_SUCCESS: | |
10860 | goto done; | |
2311178e | 10861 | |
b60c9653 | 10862 | #if 0 /* try_cursor_movement never returns this value. */ |
cb617e7c GM |
10863 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: |
10864 | goto need_larger_matrices; | |
b60c9653 | 10865 | #endif |
2311178e | 10866 | |
cb617e7c GM |
10867 | case CURSOR_MOVEMENT_MUST_SCROLL: |
10868 | goto try_to_scroll; | |
2311178e | 10869 | |
cb617e7c GM |
10870 | default: |
10871 | abort (); | |
10872 | } | |
a2889657 JB |
10873 | } |
10874 | /* If current starting point was originally the beginning of a line | |
10875 | but no longer is, find a new starting point. */ | |
265a9e55 | 10876 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
10877 | && !(CHARPOS (startp) <= BEGV |
10878 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 10879 | { |
5f5c8ee5 GM |
10880 | #if GLYPH_DEBUG |
10881 | debug_method_add (w, "recenter 1"); | |
10882 | #endif | |
a2889657 JB |
10883 | goto recenter; |
10884 | } | |
2311178e | 10885 | |
27d16f05 GM |
10886 | /* Try scrolling with try_window_id. Value is > 0 if update has |
10887 | been done, it is -1 if we know that the same window start will | |
10888 | not work. It is 0 if unsuccessful for some other reason. */ | |
10889 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 10890 | { |
5f5c8ee5 | 10891 | #if GLYPH_DEBUG |
ef121659 | 10892 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
10893 | #endif |
10894 | ||
10895 | if (fonts_changed_p) | |
cb617e7c | 10896 | goto need_larger_matrices; |
a2889657 JB |
10897 | if (tem > 0) |
10898 | goto done; | |
ef121659 | 10899 | |
5f5c8ee5 GM |
10900 | /* Otherwise try_window_id has returned -1 which means that we |
10901 | don't want the alternative below this comment to execute. */ | |
a2889657 | 10902 | } |
5f5c8ee5 GM |
10903 | else if (CHARPOS (startp) >= BEGV |
10904 | && CHARPOS (startp) <= ZV | |
10905 | && PT >= CHARPOS (startp) | |
10906 | && (CHARPOS (startp) < ZV | |
e9874cee | 10907 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 10908 | || CHARPOS (startp) == BEGV |
8850a573 RS |
10909 | || (XFASTINT (w->last_modified) >= MODIFF |
10910 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 10911 | { |
5f5c8ee5 GM |
10912 | #if GLYPH_DEBUG |
10913 | debug_method_add (w, "same window start"); | |
10914 | #endif | |
2311178e | 10915 | |
5f5c8ee5 GM |
10916 | /* Try to redisplay starting at same place as before. |
10917 | If point has not moved off frame, accept the results. */ | |
10918 | if (!current_matrix_up_to_date_p | |
10919 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
10920 | because a window scroll function can have changed the |
10921 | buffer. */ | |
5f5c8ee5 GM |
10922 | || !NILP (Vwindow_scroll_functions) |
10923 | || MINI_WINDOW_P (w) | |
10924 | || !try_window_reusing_current_matrix (w)) | |
10925 | { | |
10926 | IF_DEBUG (debug_method_add (w, "1")); | |
10927 | try_window (window, startp); | |
10928 | } | |
10929 | ||
10930 | if (fonts_changed_p) | |
cb617e7c | 10931 | goto need_larger_matrices; |
2311178e | 10932 | |
5f5c8ee5 | 10933 | if (w->cursor.vpos >= 0) |
aa6d10fa | 10934 | { |
2311178e | 10935 | if (!just_this_one_p |
5f5c8ee5 | 10936 | || current_buffer->clip_changed |
9142dd5b | 10937 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
10938 | /* Forget any recorded base line for line number display. */ |
10939 | w->base_line_number = Qnil; | |
2311178e | 10940 | |
cb617e7c | 10941 | if (!make_cursor_line_fully_visible (w)) |
03b0a4b4 RS |
10942 | { |
10943 | clear_glyph_matrix (w->desired_matrix); | |
10944 | last_line_misfit = 1; | |
10945 | } | |
ddf6b9a3 | 10946 | /* Drop through and scroll. */ |
ef3c2c73 RS |
10947 | else |
10948 | goto done; | |
aa6d10fa | 10949 | } |
a2889657 | 10950 | else |
5f5c8ee5 | 10951 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
10952 | } |
10953 | ||
5f5c8ee5 GM |
10954 | try_to_scroll: |
10955 | ||
ac90c44f GM |
10956 | w->last_modified = make_number (0); |
10957 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 10958 | |
e481f960 RS |
10959 | /* Redisplay the mode line. Select the buffer properly for that. */ |
10960 | if (!update_mode_line) | |
10961 | { | |
e481f960 RS |
10962 | update_mode_line = 1; |
10963 | w->update_mode_line = Qt; | |
10964 | } | |
a2889657 | 10965 | |
5f5c8ee5 GM |
10966 | /* Try to scroll by specified few lines. */ |
10967 | if ((scroll_conservatively | |
10968 | || scroll_step | |
10969 | || temp_scroll_step | |
10970 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
10971 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 10972 | && !current_buffer->clip_changed |
2311178e | 10973 | && CHARPOS (startp) >= BEGV |
5f5c8ee5 | 10974 | && CHARPOS (startp) <= ZV) |
0789adb2 | 10975 | { |
5f5c8ee5 GM |
10976 | /* The function returns -1 if new fonts were loaded, 1 if |
10977 | successful, 0 if not successful. */ | |
10978 | int rc = try_scrolling (window, just_this_one_p, | |
10979 | scroll_conservatively, | |
10980 | scroll_step, | |
03b0a4b4 | 10981 | temp_scroll_step, last_line_misfit); |
cb617e7c GM |
10982 | switch (rc) |
10983 | { | |
10984 | case SCROLLING_SUCCESS: | |
10985 | goto done; | |
2311178e | 10986 | |
cb617e7c GM |
10987 | case SCROLLING_NEED_LARGER_MATRICES: |
10988 | goto need_larger_matrices; | |
2311178e | 10989 | |
cb617e7c GM |
10990 | case SCROLLING_FAILED: |
10991 | break; | |
2311178e | 10992 | |
cb617e7c GM |
10993 | default: |
10994 | abort (); | |
10995 | } | |
5f5c8ee5 | 10996 | } |
f9c8af06 | 10997 | |
5f5c8ee5 | 10998 | /* Finally, just choose place to start which centers point */ |
5936754e | 10999 | |
5f5c8ee5 | 11000 | recenter: |
ddf6b9a3 RS |
11001 | centering_position = window_box_height (w) / 2; |
11002 | ||
11003 | point_at_top: | |
11004 | /* Jump here with centering_position already set to 0. */ | |
44173109 | 11005 | |
5f5c8ee5 GM |
11006 | #if GLYPH_DEBUG |
11007 | debug_method_add (w, "recenter"); | |
11008 | #endif | |
0789adb2 | 11009 | |
5f5c8ee5 | 11010 | /* w->vscroll = 0; */ |
0789adb2 | 11011 | |
5f5c8ee5 | 11012 | /* Forget any previously recorded base line for line number display. */ |
c62c1bb5 | 11013 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
11014 | w->base_line_number = Qnil; |
11015 | ||
11016 | /* Move backward half the height of the window. */ | |
11017 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
11018 | it.current_y = it.last_visible_y; | |
ddf6b9a3 | 11019 | move_it_vertically_backward (&it, centering_position); |
5f5c8ee5 GM |
11020 | xassert (IT_CHARPOS (it) >= BEGV); |
11021 | ||
11022 | /* The function move_it_vertically_backward may move over more | |
11023 | than the specified y-distance. If it->w is small, e.g. a | |
11024 | mini-buffer window, we may end up in front of the window's | |
11025 | display area. Start displaying at the start of the line | |
11026 | containing PT in this case. */ | |
11027 | if (it.current_y <= 0) | |
11028 | { | |
11029 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
11030 | move_it_vertically (&it, 0); | |
11031 | xassert (IT_CHARPOS (it) <= PT); | |
11032 | it.current_y = 0; | |
0789adb2 RS |
11033 | } |
11034 | ||
5f5c8ee5 | 11035 | it.current_x = it.hpos = 0; |
2311178e | 11036 | |
5f5c8ee5 GM |
11037 | /* Set startp here explicitly in case that helps avoid an infinite loop |
11038 | in case the window-scroll-functions functions get errors. */ | |
11039 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
11040 | ||
11041 | /* Run scroll hooks. */ | |
11042 | startp = run_window_scroll_functions (window, it.current.pos); | |
11043 | ||
11044 | /* Redisplay the window. */ | |
11045 | if (!current_matrix_up_to_date_p | |
11046 | || windows_or_buffers_changed | |
5fb96e96 | 11047 | || cursor_type_changed |
5f5c8ee5 GM |
11048 | /* Don't use try_window_reusing_current_matrix in this case |
11049 | because it can have changed the buffer. */ | |
11050 | || !NILP (Vwindow_scroll_functions) | |
11051 | || !just_this_one_p | |
11052 | || MINI_WINDOW_P (w) | |
11053 | || !try_window_reusing_current_matrix (w)) | |
11054 | try_window (window, startp); | |
11055 | ||
11056 | /* If new fonts have been loaded (due to fontsets), give up. We | |
11057 | have to start a new redisplay since we need to re-adjust glyph | |
11058 | matrices. */ | |
11059 | if (fonts_changed_p) | |
cb617e7c | 11060 | goto need_larger_matrices; |
5f5c8ee5 GM |
11061 | |
11062 | /* If cursor did not appear assume that the middle of the window is | |
11063 | in the first line of the window. Do it again with the next line. | |
11064 | (Imagine a window of height 100, displaying two lines of height | |
11065 | 60. Moving back 50 from it->last_visible_y will end in the first | |
11066 | line.) */ | |
11067 | if (w->cursor.vpos < 0) | |
a2889657 | 11068 | { |
5f5c8ee5 GM |
11069 | if (!NILP (w->window_end_valid) |
11070 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 11071 | { |
5f5c8ee5 GM |
11072 | clear_glyph_matrix (w->desired_matrix); |
11073 | move_it_by_lines (&it, 1, 0); | |
11074 | try_window (window, it.current.pos); | |
a2889657 | 11075 | } |
5f5c8ee5 | 11076 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 11077 | { |
5f5c8ee5 GM |
11078 | clear_glyph_matrix (w->desired_matrix); |
11079 | move_it_by_lines (&it, -1, 0); | |
11080 | try_window (window, it.current.pos); | |
11081 | } | |
11082 | else | |
11083 | { | |
11084 | /* Not much we can do about it. */ | |
a2889657 | 11085 | } |
a2889657 | 11086 | } |
010494d0 | 11087 | |
5f5c8ee5 GM |
11088 | /* Consider the following case: Window starts at BEGV, there is |
11089 | invisible, intangible text at BEGV, so that display starts at | |
11090 | some point START > BEGV. It can happen that we are called with | |
11091 | PT somewhere between BEGV and START. Try to handle that case. */ | |
11092 | if (w->cursor.vpos < 0) | |
835766b6 | 11093 | { |
5f5c8ee5 GM |
11094 | struct glyph_row *row = w->current_matrix->rows; |
11095 | if (row->mode_line_p) | |
11096 | ++row; | |
11097 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 11098 | } |
2311178e | 11099 | |
cb617e7c | 11100 | if (!make_cursor_line_fully_visible (w)) |
ddf6b9a3 | 11101 | { |
932357b4 KS |
11102 | /* If vscroll is enabled, disable it and try again. */ |
11103 | if (w->vscroll) | |
11104 | { | |
11105 | w->vscroll = 0; | |
11106 | clear_glyph_matrix (w->desired_matrix); | |
11107 | goto recenter; | |
11108 | } | |
2a6d0874 | 11109 | |
ddf6b9a3 RS |
11110 | /* If centering point failed to make the whole line visible, |
11111 | put point at the top instead. That has to make the whole line | |
11112 | visible, if it can be done. */ | |
11113 | centering_position = 0; | |
11114 | goto point_at_top; | |
11115 | } | |
b5174a51 | 11116 | |
74d481ac GM |
11117 | done: |
11118 | ||
5f5c8ee5 GM |
11119 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
11120 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
11121 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
11122 | ? Qt : Qnil); | |
a2889657 | 11123 | |
5f5c8ee5 | 11124 | /* Display the mode line, if we must. */ |
e481f960 | 11125 | if ((update_mode_line |
aa6d10fa | 11126 | /* If window not full width, must redo its mode line |
2311178e | 11127 | if (a) the window to its side is being redone and |
5f5c8ee5 GM |
11128 | (b) we do a frame-based redisplay. This is a consequence |
11129 | of how inverted lines are drawn in frame-based redisplay. */ | |
2311178e | 11130 | || (!just_this_one_p |
5f5c8ee5 GM |
11131 | && !FRAME_WINDOW_P (f) |
11132 | && !WINDOW_FULL_WIDTH_P (w)) | |
11133 | /* Line number to display. */ | |
155ef550 | 11134 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 11135 | /* Column number is displayed and different from the one displayed. */ |
155ef550 | 11136 | || (!NILP (w->column_number_displayed) |
2311178e TTN |
11137 | && (XFASTINT (w->column_number_displayed) |
11138 | != (int) current_column ()))) /* iftc */ | |
5f5c8ee5 GM |
11139 | /* This means that the window has a mode line. */ |
11140 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 11141 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 11142 | { |
5f5c8ee5 GM |
11143 | display_mode_lines (w); |
11144 | ||
11145 | /* If mode line height has changed, arrange for a thorough | |
11146 | immediate redisplay using the correct mode line height. */ | |
11147 | if (WINDOW_WANTS_MODELINE_P (w) | |
11148 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 11149 | { |
5f5c8ee5 GM |
11150 | fonts_changed_p = 1; |
11151 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
11152 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 11153 | } |
2311178e | 11154 | |
5f5c8ee5 GM |
11155 | /* If top line height has changed, arrange for a thorough |
11156 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
11157 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
11158 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
11159 | { |
11160 | fonts_changed_p = 1; | |
045dee35 GM |
11161 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
11162 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
11163 | } |
11164 | ||
11165 | if (fonts_changed_p) | |
cb617e7c | 11166 | goto need_larger_matrices; |
5ba50c51 | 11167 | } |
5f5c8ee5 GM |
11168 | |
11169 | if (!line_number_displayed | |
11170 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
11171 | { |
11172 | w->base_line_pos = Qnil; | |
11173 | w->base_line_number = Qnil; | |
11174 | } | |
a2889657 | 11175 | |
5f5c8ee5 | 11176 | finish_menu_bars: |
2311178e | 11177 | |
7ce2c095 | 11178 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 11179 | if (update_mode_line |
5f5c8ee5 GM |
11180 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
11181 | { | |
11182 | int redisplay_menu_p = 0; | |
488dd4c4 | 11183 | int redisplay_tool_bar_p = 0; |
5f5c8ee5 GM |
11184 | |
11185 | if (FRAME_WINDOW_P (f)) | |
11186 | { | |
488dd4c4 JD |
11187 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
11188 | || defined (USE_GTK) | |
5f5c8ee5 | 11189 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 11190 | #else |
5f5c8ee5 | 11191 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 11192 | #endif |
5f5c8ee5 GM |
11193 | } |
11194 | else | |
11195 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
11196 | ||
11197 | if (redisplay_menu_p) | |
11198 | display_menu_bar (w); | |
11199 | ||
11200 | #ifdef HAVE_WINDOW_SYSTEM | |
488dd4c4 JD |
11201 | #ifdef USE_GTK |
11202 | redisplay_tool_bar_p = FRAME_EXTERNAL_TOOL_BAR (f); | |
11203 | #else | |
11204 | redisplay_tool_bar_p = WINDOWP (f->tool_bar_window) | |
11205 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
11206 | || auto_resize_tool_bars_p); | |
177c0ea7 | 11207 | |
488dd4c4 JD |
11208 | #endif |
11209 | ||
11210 | if (redisplay_tool_bar_p) | |
11211 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
11212 | #endif |
11213 | } | |
7ce2c095 | 11214 | |
b60c9653 RS |
11215 | /* We go to this label, with fonts_changed_p nonzero, |
11216 | if it is necessary to try again using larger glyph matrices. | |
11217 | We have to redeem the scroll bar even in this case, | |
11218 | because the loop in redisplay_internal expects that. */ | |
cb617e7c GM |
11219 | need_larger_matrices: |
11220 | ; | |
88f22aff | 11221 | finish_scroll_bars: |
5f5c8ee5 | 11222 | |
88f22aff | 11223 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 11224 | { |
b1d1124b | 11225 | int start, end, whole; |
30c566e4 | 11226 | |
b1d1124b | 11227 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
11228 | At some point, it would be nice to choose between scrollbars |
11229 | which reflect the whole buffer size, with special markers | |
11230 | indicating narrowing, and scrollbars which reflect only the | |
11231 | visible region. | |
11232 | ||
5f5c8ee5 | 11233 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 11234 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 11235 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 11236 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 11237 | { |
8a9311d7 | 11238 | whole = ZV - BEGV; |
4d641a15 | 11239 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
11240 | /* I don't think this is guaranteed to be right. For the |
11241 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 11242 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 11243 | |
2311178e | 11244 | if (end < start) |
5f5c8ee5 | 11245 | end = start; |
2311178e | 11246 | if (whole < (end - start)) |
5f5c8ee5 | 11247 | whole = end - start; |
b1d1124b JB |
11248 | } |
11249 | else | |
11250 | start = end = whole = 0; | |
30c566e4 | 11251 | |
88f22aff | 11252 | /* Indicate what this scroll bar ought to be displaying now. */ |
504454e8 | 11253 | set_vertical_scroll_bar_hook (w, end - start, whole, start); |
30c566e4 | 11254 | |
5f5c8ee5 GM |
11255 | /* Note that we actually used the scroll bar attached to this |
11256 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 11257 | redeem_scroll_bar_hook (w); |
30c566e4 | 11258 | } |
b1d1124b | 11259 | |
5f5c8ee5 GM |
11260 | /* Restore current_buffer and value of point in it. */ |
11261 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 11262 | set_buffer_internal_1 (old); |
5f5c8ee5 | 11263 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
11264 | |
11265 | unbind_to (count, Qnil); | |
a2889657 | 11266 | } |
a2889657 | 11267 | |
5f5c8ee5 GM |
11268 | |
11269 | /* Build the complete desired matrix of WINDOW with a window start | |
11270 | buffer position POS. Value is non-zero if successful. It is zero | |
11271 | if fonts were loaded during redisplay which makes re-adjusting | |
11272 | glyph matrices necessary. */ | |
11273 | ||
11274 | int | |
a2889657 JB |
11275 | try_window (window, pos) |
11276 | Lisp_Object window; | |
5f5c8ee5 GM |
11277 | struct text_pos pos; |
11278 | { | |
11279 | struct window *w = XWINDOW (window); | |
11280 | struct it it; | |
11281 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 11282 | |
5f5c8ee5 GM |
11283 | /* Make POS the new window start. */ |
11284 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 11285 | |
5f5c8ee5 GM |
11286 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
11287 | w->cursor.vpos = -1; | |
a2889657 | 11288 | overlay_arrow_seen = 0; |
642eefc6 | 11289 | |
5f5c8ee5 GM |
11290 | /* Initialize iterator and info to start at POS. */ |
11291 | start_display (&it, w, pos); | |
a2889657 | 11292 | |
5f5c8ee5 GM |
11293 | /* Display all lines of W. */ |
11294 | while (it.current_y < it.last_visible_y) | |
11295 | { | |
11296 | if (display_line (&it)) | |
11297 | last_text_row = it.glyph_row - 1; | |
11298 | if (fonts_changed_p) | |
11299 | return 0; | |
11300 | } | |
a2889657 | 11301 | |
5f5c8ee5 GM |
11302 | /* If bottom moved off end of frame, change mode line percentage. */ |
11303 | if (XFASTINT (w->window_end_pos) <= 0 | |
11304 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
11305 | w->update_mode_line = Qt; |
11306 | ||
5f5c8ee5 GM |
11307 | /* Set window_end_pos to the offset of the last character displayed |
11308 | on the window from the end of current_buffer. Set | |
11309 | window_end_vpos to its row number. */ | |
11310 | if (last_text_row) | |
11311 | { | |
11312 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
11313 | w->window_end_bytepos | |
11314 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11315 | w->window_end_pos |
11316 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11317 | w->window_end_vpos | |
11318 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11319 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
11320 | ->displays_text_p); | |
11321 | } | |
11322 | else | |
11323 | { | |
11324 | w->window_end_bytepos = 0; | |
ac90c44f | 11325 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 | 11326 | } |
2311178e | 11327 | |
a2889657 JB |
11328 | /* But that is not valid info until redisplay finishes. */ |
11329 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 11330 | return 1; |
a2889657 | 11331 | } |
5f5c8ee5 GM |
11332 | |
11333 | ||
a2889657 | 11334 | \f |
5f5c8ee5 GM |
11335 | /************************************************************************ |
11336 | Window redisplay reusing current matrix when buffer has not changed | |
11337 | ************************************************************************/ | |
11338 | ||
11339 | /* Try redisplay of window W showing an unchanged buffer with a | |
11340 | different window start than the last time it was displayed by | |
11341 | reusing its current matrix. Value is non-zero if successful. | |
11342 | W->start is the new window start. */ | |
a2889657 JB |
11343 | |
11344 | static int | |
5f5c8ee5 GM |
11345 | try_window_reusing_current_matrix (w) |
11346 | struct window *w; | |
a2889657 | 11347 | { |
5f5c8ee5 GM |
11348 | struct frame *f = XFRAME (w->frame); |
11349 | struct glyph_row *row, *bottom_row; | |
11350 | struct it it; | |
11351 | struct run run; | |
11352 | struct text_pos start, new_start; | |
11353 | int nrows_scrolled, i; | |
11354 | struct glyph_row *last_text_row; | |
11355 | struct glyph_row *last_reused_text_row; | |
11356 | struct glyph_row *start_row; | |
11357 | int start_vpos, min_y, max_y; | |
75c5350a | 11358 | |
69d1f7c9 | 11359 | #if GLYPH_DEBUG |
76cb5e06 GM |
11360 | if (inhibit_try_window_reusing) |
11361 | return 0; | |
11362 | #endif | |
11363 | ||
d18354b6 GM |
11364 | if (/* This function doesn't handle terminal frames. */ |
11365 | !FRAME_WINDOW_P (f) | |
11366 | /* Don't try to reuse the display if windows have been split | |
11367 | or such. */ | |
5fb96e96 RS |
11368 | || windows_or_buffers_changed |
11369 | || cursor_type_changed) | |
5f5c8ee5 | 11370 | return 0; |
a2889657 | 11371 | |
5f5c8ee5 GM |
11372 | /* Can't do this if region may have changed. */ |
11373 | if ((!NILP (Vtransient_mark_mode) | |
11374 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
11375 | || !NILP (w->region_showing) |
11376 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 11377 | return 0; |
a2889657 | 11378 | |
5f5c8ee5 | 11379 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
11380 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
11381 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
11382 | return 0; |
11383 | ||
11384 | /* Give up if old or new display is scrolled vertically. We could | |
11385 | make this function handle this, but right now it doesn't. */ | |
11386 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11387 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
11388 | return 0; | |
11389 | ||
11390 | /* The variable new_start now holds the new window start. The old | |
11391 | start `start' can be determined from the current matrix. */ | |
11392 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
11393 | start = start_row->start.pos; | |
11394 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 11395 | |
5f5c8ee5 GM |
11396 | /* Clear the desired matrix for the display below. */ |
11397 | clear_glyph_matrix (w->desired_matrix); | |
2311178e | 11398 | |
5f5c8ee5 GM |
11399 | if (CHARPOS (new_start) <= CHARPOS (start)) |
11400 | { | |
11401 | int first_row_y; | |
2311178e | 11402 | |
607ec83c GM |
11403 | /* Don't use this method if the display starts with an ellipsis |
11404 | displayed for invisible text. It's not easy to handle that case | |
11405 | below, and it's certainly not worth the effort since this is | |
11406 | not a frequent case. */ | |
11407 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
11408 | return 0; | |
11409 | ||
5f5c8ee5 | 11410 | IF_DEBUG (debug_method_add (w, "twu1")); |
2311178e | 11411 | |
5f5c8ee5 GM |
11412 | /* Display up to a row that can be reused. The variable |
11413 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
11414 | text. Note that it.vpos == 0 if or if not there is a |
11415 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
11416 | start_display (&it, w, new_start); |
11417 | first_row_y = it.current_y; | |
11418 | w->cursor.vpos = -1; | |
11419 | last_text_row = last_reused_text_row = NULL; | |
2311178e | 11420 | |
5f5c8ee5 GM |
11421 | while (it.current_y < it.last_visible_y |
11422 | && IT_CHARPOS (it) < CHARPOS (start) | |
11423 | && !fonts_changed_p) | |
11424 | if (display_line (&it)) | |
11425 | last_text_row = it.glyph_row - 1; | |
11426 | ||
11427 | /* A value of current_y < last_visible_y means that we stopped | |
11428 | at the previous window start, which in turn means that we | |
11429 | have at least one reusable row. */ | |
11430 | if (it.current_y < it.last_visible_y) | |
a2889657 | 11431 | { |
b48f74cb | 11432 | /* IT.vpos always starts from 0; it counts text lines. */ |
5f5c8ee5 | 11433 | nrows_scrolled = it.vpos; |
2311178e | 11434 | |
5f5c8ee5 GM |
11435 | /* Find PT if not already found in the lines displayed. */ |
11436 | if (w->cursor.vpos < 0) | |
a2889657 | 11437 | { |
5f5c8ee5 | 11438 | int dy = it.current_y - first_row_y; |
2311178e | 11439 | |
5f5c8ee5 | 11440 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
0df56f4d GM |
11441 | row = row_containing_pos (w, PT, row, NULL, dy); |
11442 | if (row) | |
11443 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
11444 | dy, nrows_scrolled); | |
11445 | else | |
5f5c8ee5 GM |
11446 | { |
11447 | clear_glyph_matrix (w->desired_matrix); | |
11448 | return 0; | |
11449 | } | |
a2889657 | 11450 | } |
5f5c8ee5 GM |
11451 | |
11452 | /* Scroll the display. Do it before the current matrix is | |
11453 | changed. The problem here is that update has not yet | |
11454 | run, i.e. part of the current matrix is not up to date. | |
11455 | scroll_run_hook will clear the cursor, and use the | |
11456 | current matrix to get the height of the row the cursor is | |
11457 | in. */ | |
11458 | run.current_y = first_row_y; | |
11459 | run.desired_y = it.current_y; | |
11460 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
11461 | |
11462 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 11463 | { |
5f5c8ee5 GM |
11464 | update_begin (f); |
11465 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11466 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11467 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11468 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 11469 | update_end (f); |
a2889657 | 11470 | } |
5f5c8ee5 GM |
11471 | |
11472 | /* Shift current matrix down by nrows_scrolled lines. */ | |
11473 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
11474 | rotate_matrix (w->current_matrix, | |
11475 | start_vpos, | |
11476 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
11477 | nrows_scrolled); | |
2311178e | 11478 | |
9c8b8382 | 11479 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 11480 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 11481 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 11482 | |
5f5c8ee5 | 11483 | /* Re-compute Y positions. */ |
045dee35 | 11484 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11485 | max_y = it.last_visible_y; |
b48f74cb GM |
11486 | for (row = start_row + nrows_scrolled; |
11487 | row < bottom_row; | |
11488 | ++row) | |
d2f84654 | 11489 | { |
5f5c8ee5 | 11490 | row->y = it.current_y; |
75c5350a | 11491 | row->visible_height = row->height; |
5f5c8ee5 GM |
11492 | |
11493 | if (row->y < min_y) | |
75c5350a GM |
11494 | row->visible_height -= min_y - row->y; |
11495 | if (row->y + row->height > max_y) | |
11496 | row->visible_height -= row->y + row->height - max_y; | |
2311178e | 11497 | |
5f5c8ee5 | 11498 | it.current_y += row->height; |
5f5c8ee5 GM |
11499 | |
11500 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11501 | last_reused_text_row = row; | |
11502 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
11503 | break; | |
d2f84654 | 11504 | } |
2311178e | 11505 | |
9c8b8382 GM |
11506 | /* Disable lines in the current matrix which are now |
11507 | below the window. */ | |
bafb434c | 11508 | for (++row; row < bottom_row; ++row) |
9c8b8382 | 11509 | row->enabled_p = 0; |
a2889657 | 11510 | } |
5f5c8ee5 GM |
11511 | |
11512 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
11513 | reused row from the current matrix containing text, if any. | |
11514 | The value of last_text_row is the last displayed line | |
11515 | containing text. */ | |
11516 | if (last_reused_text_row) | |
a2889657 | 11517 | { |
5f5c8ee5 GM |
11518 | w->window_end_bytepos |
11519 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
11520 | w->window_end_pos |
11521 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
11522 | w->window_end_vpos | |
11523 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
11524 | w->current_matrix)); | |
a2889657 | 11525 | } |
5f5c8ee5 GM |
11526 | else if (last_text_row) |
11527 | { | |
11528 | w->window_end_bytepos | |
11529 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11530 | w->window_end_pos |
11531 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11532 | w->window_end_vpos | |
11533 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11534 | } |
11535 | else | |
11536 | { | |
11537 | /* This window must be completely empty. */ | |
11538 | w->window_end_bytepos = 0; | |
ac90c44f | 11539 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
11540 | } |
11541 | w->window_end_valid = Qnil; | |
a2889657 | 11542 | |
5f5c8ee5 GM |
11543 | /* Update hint: don't try scrolling again in update_window. */ |
11544 | w->desired_matrix->no_scrolling_p = 1; | |
2311178e | 11545 | |
5f5c8ee5 GM |
11546 | #if GLYPH_DEBUG |
11547 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
11548 | #endif | |
11549 | return 1; | |
a2889657 | 11550 | } |
5f5c8ee5 GM |
11551 | else if (CHARPOS (new_start) > CHARPOS (start)) |
11552 | { | |
11553 | struct glyph_row *pt_row, *row; | |
11554 | struct glyph_row *first_reusable_row; | |
11555 | struct glyph_row *first_row_to_display; | |
11556 | int dy; | |
11557 | int yb = window_text_bottom_y (w); | |
11558 | ||
5f5c8ee5 GM |
11559 | /* Find the row starting at new_start, if there is one. Don't |
11560 | reuse a partially visible line at the end. */ | |
b48f74cb | 11561 | first_reusable_row = start_row; |
5f5c8ee5 GM |
11562 | while (first_reusable_row->enabled_p |
11563 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
11564 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
11565 | < CHARPOS (new_start))) | |
11566 | ++first_reusable_row; | |
11567 | ||
11568 | /* Give up if there is no row to reuse. */ | |
11569 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
11570 | || !first_reusable_row->enabled_p |
11571 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
11572 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
11573 | return 0; |
11574 | ||
5f5c8ee5 GM |
11575 | /* We can reuse fully visible rows beginning with |
11576 | first_reusable_row to the end of the window. Set | |
11577 | first_row_to_display to the first row that cannot be reused. | |
11578 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 11579 | pt_row = NULL; |
ac90c44f GM |
11580 | for (first_row_to_display = first_reusable_row; |
11581 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
11582 | ++first_row_to_display) | |
5f5c8ee5 | 11583 | { |
4bde0ebb GM |
11584 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
11585 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 11586 | pt_row = first_row_to_display; |
5f5c8ee5 | 11587 | } |
a2889657 | 11588 | |
5f5c8ee5 GM |
11589 | /* Start displaying at the start of first_row_to_display. */ |
11590 | xassert (first_row_to_display->y < yb); | |
11591 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 11592 | |
b48f74cb GM |
11593 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
11594 | - start_vpos); | |
5f5c8ee5 GM |
11595 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
11596 | - nrows_scrolled); | |
b48f74cb GM |
11597 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
11598 | + WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); | |
5f5c8ee5 GM |
11599 | |
11600 | /* Display lines beginning with first_row_to_display in the | |
11601 | desired matrix. Set last_text_row to the last row displayed | |
11602 | that displays text. */ | |
11603 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
11604 | if (pt_row == NULL) | |
11605 | w->cursor.vpos = -1; | |
11606 | last_text_row = NULL; | |
11607 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
11608 | if (display_line (&it)) | |
11609 | last_text_row = it.glyph_row - 1; | |
11610 | ||
11611 | /* Give up If point isn't in a row displayed or reused. */ | |
11612 | if (w->cursor.vpos < 0) | |
11613 | { | |
11614 | clear_glyph_matrix (w->desired_matrix); | |
11615 | return 0; | |
11616 | } | |
12adba34 | 11617 | |
5f5c8ee5 GM |
11618 | /* If point is in a reused row, adjust y and vpos of the cursor |
11619 | position. */ | |
11620 | if (pt_row) | |
11621 | { | |
11622 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
11623 | w->current_matrix); | |
11624 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
11625 | } |
11626 | ||
5f5c8ee5 GM |
11627 | /* Scroll the display. */ |
11628 | run.current_y = first_reusable_row->y; | |
045dee35 | 11629 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11630 | run.height = it.last_visible_y - run.current_y; |
4da61803 | 11631 | dy = run.current_y - run.desired_y; |
2311178e | 11632 | |
5f5c8ee5 GM |
11633 | if (run.height) |
11634 | { | |
11635 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
11636 | update_begin (f); | |
11637 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11638 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11639 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11640 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11641 | update_end (f); |
11642 | } | |
a2889657 | 11643 | |
5f5c8ee5 GM |
11644 | /* Adjust Y positions of reused rows. */ |
11645 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
045dee35 | 11646 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11647 | max_y = it.last_visible_y; |
b48f74cb | 11648 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
11649 | { |
11650 | row->y -= dy; | |
75c5350a | 11651 | row->visible_height = row->height; |
5f5c8ee5 | 11652 | if (row->y < min_y) |
75c5350a GM |
11653 | row->visible_height -= min_y - row->y; |
11654 | if (row->y + row->height > max_y) | |
11655 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 11656 | } |
a2889657 | 11657 | |
5f5c8ee5 GM |
11658 | /* Scroll the current matrix. */ |
11659 | xassert (nrows_scrolled > 0); | |
11660 | rotate_matrix (w->current_matrix, | |
11661 | start_vpos, | |
11662 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
11663 | -nrows_scrolled); | |
11664 | ||
ac90c44f GM |
11665 | /* Disable rows not reused. */ |
11666 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
11667 | row->enabled_p = 0; | |
11668 | ||
5f5c8ee5 GM |
11669 | /* Adjust window end. A null value of last_text_row means that |
11670 | the window end is in reused rows which in turn means that | |
11671 | only its vpos can have changed. */ | |
11672 | if (last_text_row) | |
11673 | { | |
11674 | w->window_end_bytepos | |
11675 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11676 | w->window_end_pos |
11677 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11678 | w->window_end_vpos | |
11679 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11680 | } |
11681 | else | |
a2889657 | 11682 | { |
ac90c44f GM |
11683 | w->window_end_vpos |
11684 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 11685 | } |
2311178e | 11686 | |
5f5c8ee5 GM |
11687 | w->window_end_valid = Qnil; |
11688 | w->desired_matrix->no_scrolling_p = 1; | |
11689 | ||
11690 | #if GLYPH_DEBUG | |
11691 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
11692 | #endif | |
11693 | return 1; | |
a2889657 | 11694 | } |
2311178e | 11695 | |
5f5c8ee5 GM |
11696 | return 0; |
11697 | } | |
a2889657 | 11698 | |
a2889657 | 11699 | |
5f5c8ee5 GM |
11700 | \f |
11701 | /************************************************************************ | |
11702 | Window redisplay reusing current matrix when buffer has changed | |
11703 | ************************************************************************/ | |
11704 | ||
1ec185cb GM |
11705 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
11706 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
11707 | int *, int *)); |
11708 | static struct glyph_row * | |
11709 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
11710 | struct glyph_row *)); | |
11711 | ||
11712 | ||
11713 | /* Return the last row in MATRIX displaying text. If row START is | |
11714 | non-null, start searching with that row. IT gives the dimensions | |
11715 | of the display. Value is null if matrix is empty; otherwise it is | |
11716 | a pointer to the row found. */ | |
11717 | ||
11718 | static struct glyph_row * | |
11719 | find_last_row_displaying_text (matrix, it, start) | |
11720 | struct glyph_matrix *matrix; | |
11721 | struct it *it; | |
11722 | struct glyph_row *start; | |
11723 | { | |
11724 | struct glyph_row *row, *row_found; | |
11725 | ||
11726 | /* Set row_found to the last row in IT->w's current matrix | |
11727 | displaying text. The loop looks funny but think of partially | |
11728 | visible lines. */ | |
11729 | row_found = NULL; | |
11730 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
11731 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11732 | { | |
11733 | xassert (row->enabled_p); | |
11734 | row_found = row; | |
11735 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
11736 | break; | |
11737 | ++row; | |
a2889657 | 11738 | } |
2311178e | 11739 | |
5f5c8ee5 GM |
11740 | return row_found; |
11741 | } | |
11742 | ||
a2889657 | 11743 | |
5f5c8ee5 | 11744 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
11745 | by changes at the start of current_buffer that occurred since W's |
11746 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 11747 | |
d43fbe9d GM |
11748 | BEG_UNCHANGED us the number of characters unchanged at the start of |
11749 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
11750 | first changed character in current_buffer. Characters at positions < | |
11751 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
11752 | when the current matrix was built. */ | |
5f5c8ee5 GM |
11753 | |
11754 | static struct glyph_row * | |
1ec185cb | 11755 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
11756 | struct window *w; |
11757 | { | |
9142dd5b | 11758 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
11759 | struct glyph_row *row; |
11760 | struct glyph_row *row_found = NULL; | |
11761 | int yb = window_text_bottom_y (w); | |
11762 | ||
11763 | /* Find the last row displaying unchanged text. */ | |
11764 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11765 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
11766 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 11767 | { |
5f5c8ee5 GM |
11768 | if (/* If row ends before first_changed_pos, it is unchanged, |
11769 | except in some case. */ | |
11770 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
11771 | /* When row ends in ZV and we write at ZV it is not | |
11772 | unchanged. */ | |
11773 | && !row->ends_at_zv_p | |
11774 | /* When first_changed_pos is the end of a continued line, | |
11775 | row is not unchanged because it may be no longer | |
11776 | continued. */ | |
11777 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
11778 | && row->continued_p)) | |
11779 | row_found = row; | |
11780 | ||
11781 | /* Stop if last visible row. */ | |
11782 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
11783 | break; | |
2311178e | 11784 | |
5f5c8ee5 | 11785 | ++row; |
a2889657 JB |
11786 | } |
11787 | ||
5f5c8ee5 | 11788 | return row_found; |
a2889657 | 11789 | } |
5f5c8ee5 GM |
11790 | |
11791 | ||
11792 | /* Find the first glyph row in the current matrix of W that is not | |
2311178e | 11793 | affected by changes at the end of current_buffer since the |
d43fbe9d GM |
11794 | time W's current matrix was built. |
11795 | ||
11796 | Return in *DELTA the number of chars by which buffer positions in | |
11797 | unchanged text at the end of current_buffer must be adjusted. | |
2311178e | 11798 | |
d43fbe9d GM |
11799 | Return in *DELTA_BYTES the corresponding number of bytes. |
11800 | ||
11801 | Value is null if no such row exists, i.e. all rows are affected by | |
11802 | changes. */ | |
2311178e | 11803 | |
5f5c8ee5 | 11804 | static struct glyph_row * |
1ec185cb | 11805 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
11806 | struct window *w; |
11807 | int *delta, *delta_bytes; | |
a2889657 | 11808 | { |
5f5c8ee5 GM |
11809 | struct glyph_row *row; |
11810 | struct glyph_row *row_found = NULL; | |
c581d710 | 11811 | |
5f5c8ee5 | 11812 | *delta = *delta_bytes = 0; |
b2a76982 | 11813 | |
1ec185cb GM |
11814 | /* Display must not have been paused, otherwise the current matrix |
11815 | is not up to date. */ | |
11816 | if (NILP (w->window_end_valid)) | |
11817 | abort (); | |
2311178e | 11818 | |
1ec185cb | 11819 | /* A value of window_end_pos >= END_UNCHANGED means that the window |
5f5c8ee5 GM |
11820 | end is in the range of changed text. If so, there is no |
11821 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 11822 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
11823 | return NULL; |
11824 | ||
11825 | /* Set row to the last row in W's current matrix displaying text. */ | |
11826 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
2311178e TTN |
11827 | |
11828 | /* If matrix is entirely empty, no unchanged row exists. */ | |
5f5c8ee5 GM |
11829 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11830 | { | |
11831 | /* The value of row is the last glyph row in the matrix having a | |
11832 | meaningful buffer position in it. The end position of row | |
11833 | corresponds to window_end_pos. This allows us to translate | |
11834 | buffer positions in the current matrix to current buffer | |
11835 | positions for characters not in changed text. */ | |
11836 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11837 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11838 | int last_unchanged_pos, last_unchanged_pos_old; | |
11839 | struct glyph_row *first_text_row | |
11840 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11841 | ||
11842 | *delta = Z - Z_old; | |
11843 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
11844 | ||
11845 | /* Set last_unchanged_pos to the buffer position of the last | |
11846 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
11847 | index + 1 of the last character in current_buffer, i.e. by |
11848 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
11849 | unchanged character, and we have to add BEG to get its buffer |
11850 | position. */ | |
9142dd5b | 11851 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 | 11852 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
2311178e | 11853 | |
5f5c8ee5 GM |
11854 | /* Search backward from ROW for a row displaying a line that |
11855 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 11856 | for (; row > first_text_row; --row) |
5f5c8ee5 | 11857 | { |
1ec185cb GM |
11858 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11859 | abort (); | |
2311178e | 11860 | |
5f5c8ee5 GM |
11861 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) |
11862 | row_found = row; | |
5f5c8ee5 GM |
11863 | } |
11864 | } | |
11865 | ||
1ec185cb GM |
11866 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
11867 | abort (); | |
2311178e | 11868 | |
5f5c8ee5 | 11869 | return row_found; |
c581d710 RS |
11870 | } |
11871 | ||
c581d710 | 11872 | |
5f5c8ee5 GM |
11873 | /* Make sure that glyph rows in the current matrix of window W |
11874 | reference the same glyph memory as corresponding rows in the | |
11875 | frame's frame matrix. This function is called after scrolling W's | |
11876 | current matrix on a terminal frame in try_window_id and | |
11877 | try_window_reusing_current_matrix. */ | |
11878 | ||
11879 | static void | |
11880 | sync_frame_with_window_matrix_rows (w) | |
11881 | struct window *w; | |
c581d710 | 11882 | { |
5f5c8ee5 GM |
11883 | struct frame *f = XFRAME (w->frame); |
11884 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
11885 | ||
11886 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
11887 | must have a frame matrix. */ | |
11888 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
11889 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
11890 | xassert (!FRAME_WINDOW_P (f)); | |
11891 | ||
11892 | /* If W is a full-width window, glyph pointers in W's current matrix | |
11893 | have, by definition, to be the same as glyph pointers in the | |
7d4cc828 GM |
11894 | corresponding frame matrix. Note that frame matrices have no |
11895 | marginal areas (see build_frame_matrix). */ | |
5f5c8ee5 GM |
11896 | window_row = w->current_matrix->rows; |
11897 | window_row_end = window_row + w->current_matrix->nrows; | |
11898 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
11899 | while (window_row < window_row_end) | |
659a218f | 11900 | { |
7d4cc828 GM |
11901 | struct glyph *start = window_row->glyphs[LEFT_MARGIN_AREA]; |
11902 | struct glyph *end = window_row->glyphs[LAST_AREA]; | |
11903 | ||
11904 | frame_row->glyphs[LEFT_MARGIN_AREA] = start; | |
11905 | frame_row->glyphs[TEXT_AREA] = start; | |
11906 | frame_row->glyphs[RIGHT_MARGIN_AREA] = end; | |
11907 | frame_row->glyphs[LAST_AREA] = end; | |
f002db93 GM |
11908 | |
11909 | /* Disable frame rows whose corresponding window rows have | |
11910 | been disabled in try_window_id. */ | |
11911 | if (!window_row->enabled_p) | |
11912 | frame_row->enabled_p = 0; | |
2311178e | 11913 | |
5f5c8ee5 | 11914 | ++window_row, ++frame_row; |
659a218f | 11915 | } |
a2889657 | 11916 | } |
5f5c8ee5 GM |
11917 | |
11918 | ||
e037b9ec GM |
11919 | /* Find the glyph row in window W containing CHARPOS. Consider all |
11920 | rows between START and END (not inclusive). END null means search | |
11921 | all rows to the end of the display area of W. Value is the row | |
11922 | containing CHARPOS or null. */ | |
11923 | ||
0bef35bc | 11924 | struct glyph_row * |
0df56f4d | 11925 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
11926 | struct window *w; |
11927 | int charpos; | |
11928 | struct glyph_row *start, *end; | |
0df56f4d | 11929 | int dy; |
e037b9ec GM |
11930 | { |
11931 | struct glyph_row *row = start; | |
11932 | int last_y; | |
11933 | ||
11934 | /* If we happen to start on a header-line, skip that. */ | |
11935 | if (row->mode_line_p) | |
11936 | ++row; | |
2311178e | 11937 | |
e037b9ec GM |
11938 | if ((end && row >= end) || !row->enabled_p) |
11939 | return NULL; | |
2311178e | 11940 | |
0df56f4d | 11941 | last_y = window_text_bottom_y (w) - dy; |
2311178e | 11942 | |
5cce13dd RS |
11943 | while (1) |
11944 | { | |
11945 | /* Give up if we have gone too far. */ | |
11946 | if (end && row >= end) | |
11947 | return NULL; | |
40a301b3 RS |
11948 | /* This formerly returned if they were equal. |
11949 | I think that both quantities are of a "last plus one" type; | |
11950 | if so, when they are equal, the row is within the screen. -- rms. */ | |
11951 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y) | |
5cce13dd RS |
11952 | return NULL; |
11953 | ||
11954 | /* If it is in this row, return this row. */ | |
11955 | if (! (MATRIX_ROW_END_CHARPOS (row) < charpos | |
e037b9ec | 11956 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
11957 | /* The end position of a row equals the start |
11958 | position of the next row. If CHARPOS is there, we | |
11959 | would rather display it in the next line, except | |
11960 | when this line ends in ZV. */ | |
11961 | && !row->ends_at_zv_p | |
5cce13dd RS |
11962 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) |
11963 | && charpos >= MATRIX_ROW_START_CHARPOS (row)) | |
11964 | return row; | |
11965 | ++row; | |
11966 | } | |
e037b9ec GM |
11967 | } |
11968 | ||
11969 | ||
5f5c8ee5 GM |
11970 | /* Try to redisplay window W by reusing its existing display. W's |
11971 | current matrix must be up to date when this function is called, | |
11972 | i.e. window_end_valid must not be nil. | |
11973 | ||
11974 | Value is | |
11975 | ||
11976 | 1 if display has been updated | |
11977 | 0 if otherwise unsuccessful | |
11978 | -1 if redisplay with same window start is known not to succeed | |
11979 | ||
11980 | The following steps are performed: | |
11981 | ||
11982 | 1. Find the last row in the current matrix of W that is not | |
11983 | affected by changes at the start of current_buffer. If no such row | |
11984 | is found, give up. | |
11985 | ||
11986 | 2. Find the first row in W's current matrix that is not affected by | |
11987 | changes at the end of current_buffer. Maybe there is no such row. | |
11988 | ||
11989 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
11990 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
11991 | the window. | |
11992 | ||
11993 | 4. If cursor is not known to appear on the window, give up. | |
11994 | ||
11995 | 5. If display stopped at the row found in step 2, scroll the | |
11996 | display and current matrix as needed. | |
11997 | ||
11998 | 6. Maybe display some lines at the end of W, if we must. This can | |
11999 | happen under various circumstances, like a partially visible line | |
12000 | becoming fully visible, or because newly displayed lines are displayed | |
12001 | in smaller font sizes. | |
12002 | ||
12003 | 7. Update W's window end information. */ | |
12004 | ||
12adba34 | 12005 | static int |
5f5c8ee5 | 12006 | try_window_id (w) |
12adba34 | 12007 | struct window *w; |
12adba34 | 12008 | { |
5f5c8ee5 GM |
12009 | struct frame *f = XFRAME (w->frame); |
12010 | struct glyph_matrix *current_matrix = w->current_matrix; | |
12011 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
12012 | struct glyph_row *last_unchanged_at_beg_row; | |
12013 | struct glyph_row *first_unchanged_at_end_row; | |
12014 | struct glyph_row *row; | |
12015 | struct glyph_row *bottom_row; | |
12016 | int bottom_vpos; | |
12017 | struct it it; | |
12018 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
12019 | struct text_pos start_pos; | |
12020 | struct run run; | |
12021 | int first_unchanged_at_end_vpos = 0; | |
12022 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
12023 | struct text_pos start; | |
27d16f05 | 12024 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 12025 | |
69d1f7c9 | 12026 | #if GLYPH_DEBUG |
76cb5e06 GM |
12027 | if (inhibit_try_window_id) |
12028 | return 0; | |
12029 | #endif | |
12030 | ||
27d16f05 GM |
12031 | /* This is handy for debugging. */ |
12032 | #if 0 | |
12033 | #define GIVE_UP(X) \ | |
12034 | do { \ | |
12035 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
12036 | return 0; \ | |
12037 | } while (0) | |
12038 | #else | |
62397849 | 12039 | #define GIVE_UP(X) return 0 |
27d16f05 | 12040 | #endif |
2311178e | 12041 | |
5f5c8ee5 GM |
12042 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
12043 | ||
27d16f05 GM |
12044 | /* Don't use this for mini-windows because these can show |
12045 | messages and mini-buffers, and we don't handle that here. */ | |
12046 | if (MINI_WINDOW_P (w)) | |
12047 | GIVE_UP (1); | |
2311178e | 12048 | |
27d16f05 | 12049 | /* This flag is used to prevent redisplay optimizations. */ |
5fb96e96 | 12050 | if (windows_or_buffers_changed || cursor_type_changed) |
27d16f05 | 12051 | GIVE_UP (2); |
2311178e | 12052 | |
c62c1bb5 RS |
12053 | /* Verify that narrowing has not changed. |
12054 | Also verify that we were not told to prevent redisplay optimizations. | |
12055 | It would be nice to further | |
27d16f05 | 12056 | reduce the number of cases where this prevents try_window_id. */ |
c62c1bb5 RS |
12057 | if (current_buffer->clip_changed |
12058 | || current_buffer->prevent_redisplay_optimizations_p) | |
27d16f05 GM |
12059 | GIVE_UP (3); |
12060 | ||
12061 | /* Window must either use window-based redisplay or be full width. */ | |
12062 | if (!FRAME_WINDOW_P (f) | |
12063 | && (!line_ins_del_ok | |
12064 | || !WINDOW_FULL_WIDTH_P (w))) | |
12065 | GIVE_UP (4); | |
5f5c8ee5 | 12066 | |
f5376658 | 12067 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
12068 | if (PT < CHARPOS (start)) |
12069 | GIVE_UP (5); | |
12070 | ||
12071 | /* Another way to prevent redisplay optimizations. */ | |
12072 | if (XFASTINT (w->last_modified) == 0) | |
12073 | GIVE_UP (6); | |
2311178e | 12074 | |
f5376658 | 12075 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
12076 | if (XFASTINT (w->hscroll) != 0) |
12077 | GIVE_UP (7); | |
2311178e | 12078 | |
f5376658 | 12079 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
12080 | if (NILP (w->window_end_valid)) |
12081 | GIVE_UP (8); | |
2311178e | 12082 | |
27d16f05 GM |
12083 | /* Can't use this if highlighting a region because a cursor movement |
12084 | will do more than just set the cursor. */ | |
12085 | if (!NILP (Vtransient_mark_mode) | |
12086 | && !NILP (current_buffer->mark_active)) | |
12087 | GIVE_UP (9); | |
12088 | ||
12089 | /* Likewise if highlighting trailing whitespace. */ | |
12090 | if (!NILP (Vshow_trailing_whitespace)) | |
12091 | GIVE_UP (11); | |
2311178e | 12092 | |
27d16f05 GM |
12093 | /* Likewise if showing a region. */ |
12094 | if (!NILP (w->region_showing)) | |
12095 | GIVE_UP (10); | |
2311178e | 12096 | |
27d16f05 GM |
12097 | /* Can use this if overlay arrow position and or string have changed. */ |
12098 | if (!EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) | |
12099 | || !EQ (last_arrow_string, Voverlay_arrow_string)) | |
12100 | GIVE_UP (12); | |
12101 | ||
2311178e | 12102 | |
5f5c8ee5 GM |
12103 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
12104 | only if buffer has really changed. The reason is that the gap is | |
12105 | initially at Z for freshly visited files. The code below would | |
12106 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
12107 | if (MODIFF > SAVE_MODIFF |
12108 | /* This seems to happen sometimes after saving a buffer. */ | |
12109 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 12110 | { |
9142dd5b GM |
12111 | if (GPT - BEG < BEG_UNCHANGED) |
12112 | BEG_UNCHANGED = GPT - BEG; | |
12113 | if (Z - GPT < END_UNCHANGED) | |
12114 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 12115 | } |
bf9249e3 | 12116 | |
27d16f05 GM |
12117 | /* The position of the first and last character that has been changed. */ |
12118 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
12119 | last_changed_charpos = Z - END_UNCHANGED; | |
12120 | ||
5f5c8ee5 GM |
12121 | /* If window starts after a line end, and the last change is in |
12122 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
12123 | This case happens with stealth-fontification. Note that although |
12124 | the display is unchanged, glyph positions in the matrix have to | |
12125 | be adjusted, of course. */ | |
5f5c8ee5 | 12126 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 12127 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 12128 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 12129 | && CHARPOS (start) == BEGV) |
e60f4527 | 12130 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
12131 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
12132 | { | |
12133 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
12134 | struct glyph_row *r0; | |
12135 | ||
12136 | /* Compute how many chars/bytes have been added to or removed | |
12137 | from the buffer. */ | |
12138 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
12139 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
12140 | delta = Z - Z_old; | |
12141 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
2311178e | 12142 | |
27d16f05 GM |
12143 | /* Give up if PT is not in the window. Note that it already has |
12144 | been checked at the start of try_window_id that PT is not in | |
12145 | front of the window start. */ | |
12146 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
12147 | GIVE_UP (13); | |
12148 | ||
12149 | /* If window start is unchanged, we can reuse the whole matrix | |
12150 | as is, after adjusting glyph positions. No need to compute | |
12151 | the window end again, since its offset from Z hasn't changed. */ | |
12152 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
12153 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
12154 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes) | |
12155 | { | |
12156 | /* Adjust positions in the glyph matrix. */ | |
12157 | if (delta || delta_bytes) | |
12158 | { | |
12159 | struct glyph_row *r1 | |
12160 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
12161 | increment_matrix_positions (w->current_matrix, | |
12162 | MATRIX_ROW_VPOS (r0, current_matrix), | |
12163 | MATRIX_ROW_VPOS (r1, current_matrix), | |
12164 | delta, delta_bytes); | |
12165 | } | |
2311178e | 12166 | |
27d16f05 | 12167 | /* Set the cursor. */ |
0df56f4d | 12168 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
12169 | if (row) |
12170 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
12171 | else |
12172 | abort (); | |
27d16f05 GM |
12173 | return 1; |
12174 | } | |
5f5c8ee5 GM |
12175 | } |
12176 | ||
27d16f05 | 12177 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 12178 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
12179 | be taken if ZV is visible in the window, and text has been added |
12180 | there that is visible in the window. */ | |
12181 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
12182 | /* ZV is not visible in the window, or there are no |
12183 | changes at ZV, actually. */ | |
12184 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
12185 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 12186 | { |
27d16f05 | 12187 | struct glyph_row *r0; |
ef121659 | 12188 | |
27d16f05 GM |
12189 | /* Give up if PT is not in the window. Note that it already has |
12190 | been checked at the start of try_window_id that PT is not in | |
12191 | front of the window start. */ | |
12192 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
12193 | GIVE_UP (14); | |
12194 | ||
12195 | /* If window start is unchanged, we can reuse the whole matrix | |
12196 | as is, without changing glyph positions since no text has | |
12197 | been added/removed in front of the window end. */ | |
12198 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
12199 | if (TEXT_POS_EQUAL_P (start, r0->start.pos)) | |
12200 | { | |
12201 | /* We have to compute the window end anew since text | |
12202 | can have been added/removed after it. */ | |
12203 | w->window_end_pos | |
12204 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
12205 | w->window_end_bytepos | |
12206 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
12207 | ||
12208 | /* Set the cursor. */ | |
0df56f4d | 12209 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
12210 | if (row) |
12211 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
12212 | else |
12213 | abort (); | |
27d16f05 GM |
12214 | return 2; |
12215 | } | |
5f5c8ee5 GM |
12216 | } |
12217 | ||
2b9c25e0 | 12218 | /* Give up if window start is in the changed area. |
2311178e | 12219 | |
2b9c25e0 GM |
12220 | The condition used to read |
12221 | ||
12222 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
12223 | ||
12224 | but why that was tested escapes me at the moment. */ | |
12225 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
12226 | && CHARPOS (start) <= last_changed_charpos) |
12227 | GIVE_UP (15); | |
2311178e | 12228 | |
f5376658 RS |
12229 | /* Check that window start agrees with the start of the first glyph |
12230 | row in its current matrix. Check this after we know the window | |
12231 | start is not in changed text, otherwise positions would not be | |
12232 | comparable. */ | |
27d16f05 | 12233 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 12234 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 12235 | GIVE_UP (16); |
5f5c8ee5 | 12236 | |
23e8bd86 GM |
12237 | /* Give up if the window ends in strings. Overlay strings |
12238 | at the end are difficult to handle, so don't try. */ | |
12239 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
12240 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
12241 | GIVE_UP (20); | |
12242 | ||
5f5c8ee5 GM |
12243 | /* Compute the position at which we have to start displaying new |
12244 | lines. Some of the lines at the top of the window might be | |
12245 | reusable because they are not displaying changed text. Find the | |
12246 | last row in W's current matrix not affected by changes at the | |
12247 | start of current_buffer. Value is null if changes start in the | |
12248 | first line of window. */ | |
1ec185cb | 12249 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
12250 | if (last_unchanged_at_beg_row) |
12251 | { | |
67f1cf4c GM |
12252 | /* Avoid starting to display in the moddle of a character, a TAB |
12253 | for instance. This is easier than to set up the iterator | |
12254 | exactly, and it's not a frequent case, so the additional | |
12255 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
12256 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
12257 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
12258 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
12259 | --last_unchanged_at_beg_row; | |
12260 | ||
12261 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 12262 | GIVE_UP (17); |
47d57b22 GM |
12263 | |
12264 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
12265 | GIVE_UP (18); | |
5f5c8ee5 | 12266 | start_pos = it.current.pos; |
2311178e | 12267 | |
5f5c8ee5 GM |
12268 | /* Start displaying new lines in the desired matrix at the same |
12269 | vpos we would use in the current matrix, i.e. below | |
12270 | last_unchanged_at_beg_row. */ | |
12271 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
12272 | current_matrix); | |
12273 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
12274 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
12275 | ||
12276 | xassert (it.hpos == 0 && it.current_x == 0); | |
12277 | } | |
12278 | else | |
12279 | { | |
12280 | /* There are no reusable lines at the start of the window. | |
12281 | Start displaying in the first line. */ | |
12282 | start_display (&it, w, start); | |
12283 | start_pos = it.current.pos; | |
12284 | } | |
12285 | ||
5f5c8ee5 GM |
12286 | /* Find the first row that is not affected by changes at the end of |
12287 | the buffer. Value will be null if there is no unchanged row, in | |
12288 | which case we must redisplay to the end of the window. delta | |
12289 | will be set to the value by which buffer positions beginning with | |
12290 | first_unchanged_at_end_row have to be adjusted due to text | |
12291 | changes. */ | |
12292 | first_unchanged_at_end_row | |
1ec185cb | 12293 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
12294 | IF_DEBUG (debug_delta = delta); |
12295 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
2311178e | 12296 | |
5f5c8ee5 GM |
12297 | /* Set stop_pos to the buffer position up to which we will have to |
12298 | display new lines. If first_unchanged_at_end_row != NULL, this | |
12299 | is the buffer position of the start of the line displayed in that | |
12300 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
12301 | that we don't stop at a buffer position. */ | |
12302 | stop_pos = 0; | |
12303 | if (first_unchanged_at_end_row) | |
12304 | { | |
12305 | xassert (last_unchanged_at_beg_row == NULL | |
12306 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
2311178e | 12307 | |
5f5c8ee5 GM |
12308 | /* If this is a continuation line, move forward to the next one |
12309 | that isn't. Changes in lines above affect this line. | |
12310 | Caution: this may move first_unchanged_at_end_row to a row | |
12311 | not displaying text. */ | |
12312 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
12313 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
12314 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
12315 | < it.last_visible_y)) | |
12316 | ++first_unchanged_at_end_row; | |
12317 | ||
12318 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
12319 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
12320 | >= it.last_visible_y)) | |
12321 | first_unchanged_at_end_row = NULL; | |
12322 | else | |
12323 | { | |
12324 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
12325 | + delta); | |
12326 | first_unchanged_at_end_vpos | |
12327 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 12328 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
12329 | } |
12330 | } | |
12331 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 12332 | GIVE_UP (19); |
5f5c8ee5 GM |
12333 | |
12334 | ||
12335 | #if GLYPH_DEBUG | |
2311178e | 12336 | |
5f5c8ee5 GM |
12337 | /* Either there is no unchanged row at the end, or the one we have |
12338 | now displays text. This is a necessary condition for the window | |
12339 | end pos calculation at the end of this function. */ | |
12340 | xassert (first_unchanged_at_end_row == NULL | |
12341 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
2311178e | 12342 | |
5f5c8ee5 GM |
12343 | debug_last_unchanged_at_beg_vpos |
12344 | = (last_unchanged_at_beg_row | |
12345 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
12346 | : -1); | |
12347 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
2311178e | 12348 | |
5f5c8ee5 GM |
12349 | #endif /* GLYPH_DEBUG != 0 */ |
12350 | ||
2311178e | 12351 | |
5f5c8ee5 GM |
12352 | /* Display new lines. Set last_text_row to the last new line |
12353 | displayed which has text on it, i.e. might end up as being the | |
12354 | line where the window_end_vpos is. */ | |
12355 | w->cursor.vpos = -1; | |
12356 | last_text_row = NULL; | |
12357 | overlay_arrow_seen = 0; | |
12358 | while (it.current_y < it.last_visible_y | |
12359 | && !fonts_changed_p | |
12360 | && (first_unchanged_at_end_row == NULL | |
12361 | || IT_CHARPOS (it) < stop_pos)) | |
12362 | { | |
12363 | if (display_line (&it)) | |
12364 | last_text_row = it.glyph_row - 1; | |
12365 | } | |
12366 | ||
12367 | if (fonts_changed_p) | |
12368 | return -1; | |
12369 | ||
12370 | ||
12371 | /* Compute differences in buffer positions, y-positions etc. for | |
12372 | lines reused at the bottom of the window. Compute what we can | |
12373 | scroll. */ | |
ca42b2e8 GM |
12374 | if (first_unchanged_at_end_row |
12375 | /* No lines reused because we displayed everything up to the | |
12376 | bottom of the window. */ | |
12377 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
12378 | { |
12379 | dvpos = (it.vpos | |
12380 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
12381 | current_matrix)); | |
12382 | dy = it.current_y - first_unchanged_at_end_row->y; | |
12383 | run.current_y = first_unchanged_at_end_row->y; | |
12384 | run.desired_y = run.current_y + dy; | |
12385 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
12386 | } | |
12387 | else | |
ca42b2e8 GM |
12388 | { |
12389 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
12390 | first_unchanged_at_end_row = NULL; | |
12391 | } | |
5f5c8ee5 GM |
12392 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
12393 | ||
8f8ba186 | 12394 | |
5f5c8ee5 GM |
12395 | /* Find the cursor if not already found. We have to decide whether |
12396 | PT will appear on this window (it sometimes doesn't, but this is | |
12397 | not a very frequent case.) This decision has to be made before | |
12398 | the current matrix is altered. A value of cursor.vpos < 0 means | |
12399 | that PT is either in one of the lines beginning at | |
12400 | first_unchanged_at_end_row or below the window. Don't care for | |
12401 | lines that might be displayed later at the window end; as | |
12402 | mentioned, this is not a frequent case. */ | |
12403 | if (w->cursor.vpos < 0) | |
12404 | { | |
5f5c8ee5 GM |
12405 | /* Cursor in unchanged rows at the top? */ |
12406 | if (PT < CHARPOS (start_pos) | |
12407 | && last_unchanged_at_beg_row) | |
12408 | { | |
e037b9ec GM |
12409 | row = row_containing_pos (w, PT, |
12410 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 12411 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
12412 | if (row) |
12413 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
12414 | } |
12415 | ||
12416 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
12417 | else if (first_unchanged_at_end_row) | |
12418 | { | |
e037b9ec | 12419 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 12420 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 12421 | if (row) |
468155d7 GM |
12422 | set_cursor_from_row (w, row, w->current_matrix, delta, |
12423 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
12424 | } |
12425 | ||
12426 | /* Give up if cursor was not found. */ | |
12427 | if (w->cursor.vpos < 0) | |
12428 | { | |
12429 | clear_glyph_matrix (w->desired_matrix); | |
12430 | return -1; | |
12431 | } | |
12432 | } | |
2311178e | 12433 | |
5f5c8ee5 GM |
12434 | /* Don't let the cursor end in the scroll margins. */ |
12435 | { | |
12436 | int this_scroll_margin, cursor_height; | |
2311178e | 12437 | |
5f5c8ee5 GM |
12438 | this_scroll_margin = max (0, scroll_margin); |
12439 | this_scroll_margin = min (this_scroll_margin, | |
12440 | XFASTINT (w->height) / 4); | |
12441 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
12442 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
2311178e | 12443 | |
5f5c8ee5 GM |
12444 | if ((w->cursor.y < this_scroll_margin |
12445 | && CHARPOS (start) > BEGV) | |
12446 | /* Don't take scroll margin into account at the bottom because | |
12447 | old redisplay didn't do it either. */ | |
12448 | || w->cursor.y + cursor_height > it.last_visible_y) | |
12449 | { | |
12450 | w->cursor.vpos = -1; | |
12451 | clear_glyph_matrix (w->desired_matrix); | |
12452 | return -1; | |
12453 | } | |
12454 | } | |
12455 | ||
12456 | /* Scroll the display. Do it before changing the current matrix so | |
12457 | that xterm.c doesn't get confused about where the cursor glyph is | |
12458 | found. */ | |
fa77249f | 12459 | if (dy && run.height) |
5f5c8ee5 GM |
12460 | { |
12461 | update_begin (f); | |
2311178e | 12462 | |
5f5c8ee5 GM |
12463 | if (FRAME_WINDOW_P (f)) |
12464 | { | |
12465 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 12466 | rif->clear_mouse_face (w); |
5f5c8ee5 | 12467 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 12468 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
12469 | } |
12470 | else | |
12471 | { | |
12472 | /* Terminal frame. In this case, dvpos gives the number of | |
12473 | lines to scroll by; dvpos < 0 means scroll up. */ | |
12474 | int first_unchanged_at_end_vpos | |
12475 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
12476 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
522ed7fb GM |
12477 | int end = (XFASTINT (w->top) |
12478 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) | |
12479 | + window_internal_height (w)); | |
2311178e | 12480 | |
5f5c8ee5 GM |
12481 | /* Perform the operation on the screen. */ |
12482 | if (dvpos > 0) | |
12483 | { | |
12484 | /* Scroll last_unchanged_at_beg_row to the end of the | |
12485 | window down dvpos lines. */ | |
12486 | set_terminal_window (end); | |
12487 | ||
12488 | /* On dumb terminals delete dvpos lines at the end | |
12489 | before inserting dvpos empty lines. */ | |
12490 | if (!scroll_region_ok) | |
12491 | ins_del_lines (end - dvpos, -dvpos); | |
12492 | ||
12493 | /* Insert dvpos empty lines in front of | |
12494 | last_unchanged_at_beg_row. */ | |
12495 | ins_del_lines (from, dvpos); | |
12496 | } | |
12497 | else if (dvpos < 0) | |
12498 | { | |
12499 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
12500 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
12501 | set_terminal_window (end); | |
12502 | ||
12503 | /* Delete dvpos lines in front of | |
12504 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
12505 | the cursor to the given vpos and emit |dvpos| delete | |
12506 | line sequences. */ | |
12507 | ins_del_lines (from + dvpos, dvpos); | |
12508 | ||
12509 | /* On a dumb terminal insert dvpos empty lines at the | |
12510 | end. */ | |
12511 | if (!scroll_region_ok) | |
12512 | ins_del_lines (end + dvpos, -dvpos); | |
12513 | } | |
2311178e | 12514 | |
5f5c8ee5 GM |
12515 | set_terminal_window (0); |
12516 | } | |
2311178e | 12517 | |
5f5c8ee5 GM |
12518 | update_end (f); |
12519 | } | |
12520 | ||
ca42b2e8 GM |
12521 | /* Shift reused rows of the current matrix to the right position. |
12522 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
12523 | text. */ | |
12524 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
12525 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
12526 | if (dvpos < 0) |
12527 | { | |
12528 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
12529 | bottom_vpos, dvpos); | |
12530 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
12531 | bottom_vpos, 0); | |
12532 | } | |
12533 | else if (dvpos > 0) | |
12534 | { | |
12535 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
12536 | bottom_vpos, dvpos); | |
12537 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
12538 | first_unchanged_at_end_vpos + dvpos, 0); | |
12539 | } | |
12540 | ||
12541 | /* For frame-based redisplay, make sure that current frame and window | |
12542 | matrix are in sync with respect to glyph memory. */ | |
12543 | if (!FRAME_WINDOW_P (f)) | |
12544 | sync_frame_with_window_matrix_rows (w); | |
12545 | ||
12546 | /* Adjust buffer positions in reused rows. */ | |
12547 | if (delta) | |
f2d86d7a GM |
12548 | increment_matrix_positions (current_matrix, |
12549 | first_unchanged_at_end_vpos + dvpos, | |
12550 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
12551 | |
12552 | /* Adjust Y positions. */ | |
12553 | if (dy) | |
12554 | shift_glyph_matrix (w, current_matrix, | |
12555 | first_unchanged_at_end_vpos + dvpos, | |
12556 | bottom_vpos, dy); | |
12557 | ||
12558 | if (first_unchanged_at_end_row) | |
12559 | first_unchanged_at_end_row += dvpos; | |
12560 | ||
12561 | /* If scrolling up, there may be some lines to display at the end of | |
12562 | the window. */ | |
12563 | last_text_row_at_end = NULL; | |
12564 | if (dy < 0) | |
12565 | { | |
9c6ba6d1 GM |
12566 | /* Scrolling up can leave for example a partially visible line |
12567 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
12568 | /* Set last_row to the glyph row in the current matrix where the |
12569 | window end line is found. It has been moved up or down in | |
12570 | the matrix by dvpos. */ | |
12571 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
12572 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
12573 | ||
12574 | /* If last_row is the window end line, it should display text. */ | |
12575 | xassert (last_row->displays_text_p); | |
12576 | ||
12577 | /* If window end line was partially visible before, begin | |
12578 | displaying at that line. Otherwise begin displaying with the | |
12579 | line following it. */ | |
12580 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
12581 | { | |
12582 | init_to_row_start (&it, w, last_row); | |
12583 | it.vpos = last_vpos; | |
12584 | it.current_y = last_row->y; | |
12585 | } | |
12586 | else | |
12587 | { | |
12588 | init_to_row_end (&it, w, last_row); | |
12589 | it.vpos = 1 + last_vpos; | |
12590 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
12591 | ++last_row; | |
12592 | } | |
12adba34 | 12593 | |
23e8bd86 GM |
12594 | /* We may start in a continuation line. If so, we have to |
12595 | get the right continuation_lines_width and current_x. */ | |
12596 | it.continuation_lines_width = last_row->continuation_lines_width; | |
12597 | it.hpos = it.current_x = 0; | |
2311178e | 12598 | |
23e8bd86 GM |
12599 | /* Display the rest of the lines at the window end. */ |
12600 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
12601 | while (it.current_y < it.last_visible_y | |
12602 | && !fonts_changed_p) | |
5f5c8ee5 | 12603 | { |
23e8bd86 GM |
12604 | /* Is it always sure that the display agrees with lines in |
12605 | the current matrix? I don't think so, so we mark rows | |
12606 | displayed invalid in the current matrix by setting their | |
12607 | enabled_p flag to zero. */ | |
12608 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
12609 | if (display_line (&it)) | |
12610 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
12611 | } |
12612 | } | |
12adba34 | 12613 | |
5f5c8ee5 GM |
12614 | /* Update window_end_pos and window_end_vpos. */ |
12615 | if (first_unchanged_at_end_row | |
12616 | && first_unchanged_at_end_row->y < it.last_visible_y | |
12617 | && !last_text_row_at_end) | |
12618 | { | |
12619 | /* Window end line if one of the preserved rows from the current | |
12620 | matrix. Set row to the last row displaying text in current | |
12621 | matrix starting at first_unchanged_at_end_row, after | |
12622 | scrolling. */ | |
12623 | xassert (first_unchanged_at_end_row->displays_text_p); | |
12624 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
12625 | first_unchanged_at_end_row); | |
12626 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
2311178e | 12627 | |
ac90c44f | 12628 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 12629 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
12630 | w->window_end_vpos |
12631 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 12632 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12633 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
12634 | } |
12635 | else if (last_text_row_at_end) | |
12636 | { | |
ac90c44f GM |
12637 | w->window_end_pos |
12638 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
12639 | w->window_end_bytepos |
12640 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
12641 | w->window_end_vpos |
12642 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 12643 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12644 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
12645 | } |
12646 | else if (last_text_row) | |
12647 | { | |
12648 | /* We have displayed either to the end of the window or at the | |
12649 | end of the window, i.e. the last row with text is to be found | |
12650 | in the desired matrix. */ | |
ac90c44f GM |
12651 | w->window_end_pos |
12652 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
12653 | w->window_end_bytepos |
12654 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12655 | w->window_end_vpos |
12656 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 12657 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
12658 | } |
12659 | else if (first_unchanged_at_end_row == NULL | |
12660 | && last_text_row == NULL | |
12661 | && last_text_row_at_end == NULL) | |
12662 | { | |
12663 | /* Displayed to end of window, but no line containing text was | |
12664 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
12665 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
12666 | int vpos = XFASTINT (w->window_end_vpos); | |
12667 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
12668 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
12669 | ||
12670 | for (row = NULL; | |
12671 | row == NULL && vpos >= first_vpos; | |
12672 | --vpos, --current_row, --desired_row) | |
12673 | { | |
12674 | if (desired_row->enabled_p) | |
12675 | { | |
12676 | if (desired_row->displays_text_p) | |
12677 | row = desired_row; | |
12678 | } | |
12679 | else if (current_row->displays_text_p) | |
12680 | row = current_row; | |
12681 | } | |
12adba34 | 12682 | |
0416532f | 12683 | xassert (row != NULL); |
d88a79d4 | 12684 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
12685 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
12686 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 12687 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12688 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
12689 | } |
12690 | else | |
12691 | abort (); | |
ac90c44f | 12692 | |
8cdb267e GM |
12693 | #if 0 /* This leads to problems, for instance when the cursor is |
12694 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
12695 | /* Disable rows below what's displayed in the window. This makes |
12696 | debugging easier. */ | |
12697 | enable_glyph_matrix_rows (current_matrix, | |
12698 | XFASTINT (w->window_end_vpos) + 1, | |
12699 | bottom_vpos, 0); | |
8cdb267e | 12700 | #endif |
23e8bd86 | 12701 | |
5f5c8ee5 GM |
12702 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
12703 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 12704 | |
5f5c8ee5 GM |
12705 | /* Record that display has not been completed. */ |
12706 | w->window_end_valid = Qnil; | |
12707 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 12708 | return 3; |
27d16f05 GM |
12709 | |
12710 | #undef GIVE_UP | |
12adba34 | 12711 | } |
0f9c0ff0 | 12712 | |
a2889657 | 12713 | |
5f5c8ee5 GM |
12714 | \f |
12715 | /*********************************************************************** | |
12716 | More debugging support | |
12717 | ***********************************************************************/ | |
a2889657 | 12718 | |
5f5c8ee5 | 12719 | #if GLYPH_DEBUG |
a2889657 | 12720 | |
eaaa65b0 | 12721 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 12722 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 12723 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 12724 | |
31b24551 | 12725 | |
9ab436b9 | 12726 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 12727 | |
9ab436b9 GM |
12728 | GLYPHS 0 means don't show glyph contents. |
12729 | GLYPHS 1 means show glyphs in short form | |
12730 | GLYPHS > 1 means show glyphs in long form. */ | |
12731 | ||
12732 | void | |
12733 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 12734 | struct glyph_matrix *matrix; |
9ab436b9 | 12735 | int glyphs; |
5f5c8ee5 | 12736 | { |
efc63ef0 | 12737 | int i; |
5f5c8ee5 | 12738 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 12739 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 12740 | } |
31b24551 | 12741 | |
68a37fa8 | 12742 | |
e187cf71 GM |
12743 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
12744 | the glyph row and area where the glyph comes from. */ | |
12745 | ||
12746 | void | |
12747 | dump_glyph (row, glyph, area) | |
12748 | struct glyph_row *row; | |
12749 | struct glyph *glyph; | |
12750 | int area; | |
12751 | { | |
12752 | if (glyph->type == CHAR_GLYPH) | |
12753 | { | |
12754 | fprintf (stderr, | |
12755 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12756 | glyph - row->glyphs[TEXT_AREA], | |
12757 | 'C', | |
12758 | glyph->charpos, | |
12759 | (BUFFERP (glyph->object) | |
12760 | ? 'B' | |
12761 | : (STRINGP (glyph->object) | |
12762 | ? 'S' | |
12763 | : '-')), | |
12764 | glyph->pixel_width, | |
12765 | glyph->u.ch, | |
12766 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
12767 | ? glyph->u.ch | |
12768 | : '.'), | |
12769 | glyph->face_id, | |
12770 | glyph->left_box_line_p, | |
12771 | glyph->right_box_line_p); | |
12772 | } | |
12773 | else if (glyph->type == STRETCH_GLYPH) | |
12774 | { | |
12775 | fprintf (stderr, | |
12776 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12777 | glyph - row->glyphs[TEXT_AREA], | |
12778 | 'S', | |
12779 | glyph->charpos, | |
12780 | (BUFFERP (glyph->object) | |
12781 | ? 'B' | |
12782 | : (STRINGP (glyph->object) | |
12783 | ? 'S' | |
12784 | : '-')), | |
12785 | glyph->pixel_width, | |
12786 | 0, | |
12787 | '.', | |
12788 | glyph->face_id, | |
12789 | glyph->left_box_line_p, | |
12790 | glyph->right_box_line_p); | |
12791 | } | |
12792 | else if (glyph->type == IMAGE_GLYPH) | |
12793 | { | |
12794 | fprintf (stderr, | |
12795 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12796 | glyph - row->glyphs[TEXT_AREA], | |
12797 | 'I', | |
12798 | glyph->charpos, | |
12799 | (BUFFERP (glyph->object) | |
12800 | ? 'B' | |
12801 | : (STRINGP (glyph->object) | |
12802 | ? 'S' | |
12803 | : '-')), | |
12804 | glyph->pixel_width, | |
12805 | glyph->u.img_id, | |
12806 | '.', | |
12807 | glyph->face_id, | |
12808 | glyph->left_box_line_p, | |
12809 | glyph->right_box_line_p); | |
12810 | } | |
12811 | } | |
12812 | ||
12813 | ||
5f5c8ee5 | 12814 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
12815 | GLYPHS 0 means don't show glyph contents. |
12816 | GLYPHS 1 means show glyphs in short form | |
12817 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 12818 | |
5f5c8ee5 | 12819 | void |
eaaa65b0 GM |
12820 | dump_glyph_row (row, vpos, glyphs) |
12821 | struct glyph_row *row; | |
9ab436b9 | 12822 | int vpos, glyphs; |
5f5c8ee5 | 12823 | { |
9ab436b9 GM |
12824 | if (glyphs != 1) |
12825 | { | |
b94c0d9c | 12826 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n"); |
9ab436b9 | 12827 | fprintf (stderr, "=======================================================================\n"); |
2311178e | 12828 | |
0ad38729 | 12829 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 12830 | %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 | 12831 | vpos, |
9ab436b9 GM |
12832 | MATRIX_ROW_START_CHARPOS (row), |
12833 | MATRIX_ROW_END_CHARPOS (row), | |
12834 | row->used[TEXT_AREA], | |
12835 | row->contains_overlapping_glyphs_p, | |
12836 | row->enabled_p, | |
9ab436b9 GM |
12837 | row->truncated_on_left_p, |
12838 | row->truncated_on_right_p, | |
12839 | row->overlay_arrow_p, | |
12840 | row->continued_p, | |
12841 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
12842 | row->displays_text_p, | |
12843 | row->ends_at_zv_p, | |
12844 | row->fill_line_p, | |
12845 | row->ends_in_middle_of_char_p, | |
12846 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 12847 | row->mouse_face_p, |
9ab436b9 GM |
12848 | row->x, |
12849 | row->y, | |
12850 | row->pixel_width, | |
12851 | row->height, | |
12852 | row->visible_height, | |
12853 | row->ascent, | |
12854 | row->phys_ascent); | |
33ea6c4d GM |
12855 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
12856 | row->end.overlay_string_index, | |
12857 | row->continuation_lines_width); | |
9ab436b9 GM |
12858 | fprintf (stderr, "%9d %5d\n", |
12859 | CHARPOS (row->start.string_pos), | |
12860 | CHARPOS (row->end.string_pos)); | |
12861 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
12862 | row->end.dpvec_index); | |
12863 | } | |
2311178e | 12864 | |
9ab436b9 | 12865 | if (glyphs > 1) |
bd66d1ba | 12866 | { |
e187cf71 GM |
12867 | int area; |
12868 | ||
12869 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12870 | { | |
091f8878 GM |
12871 | struct glyph *glyph = row->glyphs[area]; |
12872 | struct glyph *glyph_end = glyph + row->used[area]; | |
2311178e | 12873 | |
e187cf71 | 12874 | /* Glyph for a line end in text. */ |
091f8878 | 12875 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 12876 | ++glyph_end; |
2311178e | 12877 | |
e187cf71 GM |
12878 | if (glyph < glyph_end) |
12879 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
2311178e | 12880 | |
e187cf71 GM |
12881 | for (; glyph < glyph_end; ++glyph) |
12882 | dump_glyph (row, glyph, area); | |
f7b4b63a | 12883 | } |
f4faa47c | 12884 | } |
9ab436b9 GM |
12885 | else if (glyphs == 1) |
12886 | { | |
e187cf71 | 12887 | int area; |
9ab436b9 | 12888 | |
e187cf71 | 12889 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 12890 | { |
e187cf71 GM |
12891 | char *s = (char *) alloca (row->used[area] + 1); |
12892 | int i; | |
12893 | ||
12894 | for (i = 0; i < row->used[area]; ++i) | |
12895 | { | |
12896 | struct glyph *glyph = row->glyphs[area] + i; | |
12897 | if (glyph->type == CHAR_GLYPH | |
12898 | && glyph->u.ch < 0x80 | |
12899 | && glyph->u.ch >= ' ') | |
12900 | s[i] = glyph->u.ch; | |
12901 | else | |
12902 | s[i] = '.'; | |
12903 | } | |
2311178e | 12904 | |
e187cf71 GM |
12905 | s[i] = '\0'; |
12906 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
12907 | } | |
9ab436b9 | 12908 | } |
5f5c8ee5 | 12909 | } |
f4faa47c | 12910 | |
a2889657 | 12911 | |
5f5c8ee5 GM |
12912 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
12913 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 12914 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
12915 | Shows contents of glyph row structures. With non-nil |
12916 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
12917 | glyphs in short form, otherwise show glyphs in long form. */) |
12918 | (glyphs) | |
9ab436b9 | 12919 | Lisp_Object glyphs; |
5f5c8ee5 GM |
12920 | { |
12921 | struct window *w = XWINDOW (selected_window); | |
12922 | struct buffer *buffer = XBUFFER (w->buffer); | |
12923 | ||
12924 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
12925 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
12926 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
12927 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
12928 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
12929 | dump_glyph_matrix (w->current_matrix, |
12930 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
12931 | return Qnil; |
12932 | } | |
1c2250c2 | 12933 | |
1fca3fae | 12934 | |
7d4cc828 GM |
12935 | DEFUN ("dump-frame-glyph-matrix", Fdump_frame_glyph_matrix, |
12936 | Sdump_frame_glyph_matrix, 0, 0, "", doc: /* */) | |
12937 | () | |
12938 | { | |
12939 | struct frame *f = XFRAME (selected_frame); | |
12940 | dump_glyph_matrix (f->current_matrix, 1); | |
12941 | return Qnil; | |
12942 | } | |
12943 | ||
12944 | ||
e9abc296 | 12945 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 12946 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
12947 | GLYPH 0 means don't dump glyphs. |
12948 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12949 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12950 | (row, glyphs) | |
e9abc296 | 12951 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12952 | { |
eaaa65b0 GM |
12953 | struct glyph_matrix *matrix; |
12954 | int vpos; | |
2311178e | 12955 | |
b7826503 | 12956 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12957 | matrix = XWINDOW (selected_window)->current_matrix; |
12958 | vpos = XINT (row); | |
12959 | if (vpos >= 0 && vpos < matrix->nrows) | |
12960 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
12961 | vpos, | |
12962 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12963 | return Qnil; |
12964 | } | |
1fca3fae | 12965 | |
67481ae5 | 12966 | |
b94c0d9c | 12967 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 12968 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
12969 | GLYPH 0 means don't dump glyphs. |
12970 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12971 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12972 | (row, glyphs) | |
b94c0d9c | 12973 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12974 | { |
886bd6f2 | 12975 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
12976 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
12977 | int vpos; | |
2311178e | 12978 | |
b7826503 | 12979 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12980 | vpos = XINT (row); |
12981 | if (vpos >= 0 && vpos < m->nrows) | |
12982 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
12983 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12984 | return Qnil; |
12985 | } | |
ca26e1c8 | 12986 | |
0f9c0ff0 | 12987 | |
62397849 | 12988 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
12989 | doc: /* Toggle tracing of redisplay. |
12990 | With ARG, turn tracing on if and only if ARG is positive. */) | |
12991 | (arg) | |
62397849 | 12992 | Lisp_Object arg; |
5f5c8ee5 | 12993 | { |
62397849 GM |
12994 | if (NILP (arg)) |
12995 | trace_redisplay_p = !trace_redisplay_p; | |
12996 | else | |
12997 | { | |
12998 | arg = Fprefix_numeric_value (arg); | |
12999 | trace_redisplay_p = XINT (arg) > 0; | |
13000 | } | |
2311178e | 13001 | |
5f5c8ee5 GM |
13002 | return Qnil; |
13003 | } | |
bf9249e3 GM |
13004 | |
13005 | ||
f4a374a1 | 13006 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
e9757d41 SM |
13007 | doc: /* Like `format', but print result to stderr. |
13008 | usage: (trace-to-stderr STRING &rest OBJECTS) */) | |
7ee72033 | 13009 | (nargs, args) |
f4a374a1 GM |
13010 | int nargs; |
13011 | Lisp_Object *args; | |
bf9249e3 | 13012 | { |
f4a374a1 | 13013 | Lisp_Object s = Fformat (nargs, args); |
2051c264 | 13014 | fprintf (stderr, "%s", SDATA (s)); |
bf9249e3 GM |
13015 | return Qnil; |
13016 | } | |
2311178e | 13017 | |
5f5c8ee5 | 13018 | #endif /* GLYPH_DEBUG */ |
ca26e1c8 | 13019 | |
ca26e1c8 | 13020 | |
5f5c8ee5 GM |
13021 | \f |
13022 | /*********************************************************************** | |
13023 | Building Desired Matrix Rows | |
13024 | ***********************************************************************/ | |
a2889657 | 13025 | |
5f5c8ee5 GM |
13026 | /* Return a temporary glyph row holding the glyphs of an overlay |
13027 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 13028 | |
5f5c8ee5 GM |
13029 | static struct glyph_row * |
13030 | get_overlay_arrow_glyph_row (w) | |
13031 | struct window *w; | |
13032 | { | |
13033 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
13034 | struct buffer *buffer = XBUFFER (w->buffer); | |
13035 | struct buffer *old = current_buffer; | |
50f80c2f | 13036 | const unsigned char *arrow_string = SDATA (Voverlay_arrow_string); |
2051c264 | 13037 | int arrow_len = SCHARS (Voverlay_arrow_string); |
50f80c2f KR |
13038 | const unsigned char *arrow_end = arrow_string + arrow_len; |
13039 | const unsigned char *p; | |
5f5c8ee5 GM |
13040 | struct it it; |
13041 | int multibyte_p; | |
13042 | int n_glyphs_before; | |
13043 | ||
13044 | set_buffer_temp (buffer); | |
13045 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
13046 | it.glyph_row->used[TEXT_AREA] = 0; | |
13047 | SET_TEXT_POS (it.position, 0, 0); | |
13048 | ||
13049 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
13050 | p = arrow_string; | |
13051 | while (p < arrow_end) | |
13052 | { | |
13053 | Lisp_Object face, ilisp; | |
2311178e | 13054 | |
5f5c8ee5 GM |
13055 | /* Get the next character. */ |
13056 | if (multibyte_p) | |
4fdb80f2 | 13057 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
13058 | else |
13059 | it.c = *p, it.len = 1; | |
13060 | p += it.len; | |
2311178e | 13061 | |
5f5c8ee5 | 13062 | /* Get its face. */ |
ac90c44f | 13063 | ilisp = make_number (p - arrow_string); |
5f5c8ee5 GM |
13064 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
13065 | it.face_id = compute_char_face (f, it.c, face); | |
13066 | ||
13067 | /* Compute its width, get its glyphs. */ | |
13068 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 13069 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
13070 | PRODUCE_GLYPHS (&it); |
13071 | ||
13072 | /* If this character doesn't fit any more in the line, we have | |
13073 | to remove some glyphs. */ | |
13074 | if (it.current_x > it.last_visible_x) | |
13075 | { | |
13076 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
13077 | break; | |
13078 | } | |
13079 | } | |
2311178e | 13080 | |
5f5c8ee5 GM |
13081 | set_buffer_temp (old); |
13082 | return it.glyph_row; | |
13083 | } | |
ca26e1c8 | 13084 | |
b0a0fbda | 13085 | |
5f5c8ee5 GM |
13086 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
13087 | glyphs are only inserted for terminal frames since we can't really | |
13088 | win with truncation glyphs when partially visible glyphs are | |
13089 | involved. Which glyphs to insert is determined by | |
13090 | produce_special_glyphs. */ | |
67481ae5 | 13091 | |
5f5c8ee5 GM |
13092 | static void |
13093 | insert_left_trunc_glyphs (it) | |
13094 | struct it *it; | |
13095 | { | |
13096 | struct it truncate_it; | |
13097 | struct glyph *from, *end, *to, *toend; | |
13098 | ||
13099 | xassert (!FRAME_WINDOW_P (it->f)); | |
13100 | ||
13101 | /* Get the truncation glyphs. */ | |
13102 | truncate_it = *it; | |
5f5c8ee5 GM |
13103 | truncate_it.current_x = 0; |
13104 | truncate_it.face_id = DEFAULT_FACE_ID; | |
13105 | truncate_it.glyph_row = &scratch_glyph_row; | |
13106 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
13107 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 13108 | truncate_it.object = make_number (0); |
5f5c8ee5 | 13109 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
2311178e | 13110 | |
5f5c8ee5 GM |
13111 | /* Overwrite glyphs from IT with truncation glyphs. */ |
13112 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
13113 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
13114 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
13115 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
13116 | ||
13117 | while (from < end) | |
13118 | *to++ = *from++; | |
13119 | ||
37be86f2 KH |
13120 | /* There may be padding glyphs left over. Overwrite them too. */ |
13121 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
13122 | { | |
13123 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
13124 | while (from < end) | |
13125 | *to++ = *from++; | |
13126 | } | |
5f5c8ee5 | 13127 | |
37be86f2 KH |
13128 | if (to > toend) |
13129 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 13130 | } |
e0bfbde6 | 13131 | |
e0bfbde6 | 13132 | |
5f5c8ee5 | 13133 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 13134 | |
5f5c8ee5 GM |
13135 | Most of the time, ascent and height of a display line will be equal |
13136 | to the max_ascent and max_height values of the display iterator | |
13137 | structure. This is not the case if | |
67481ae5 | 13138 | |
5f5c8ee5 GM |
13139 | 1. We hit ZV without displaying anything. In this case, max_ascent |
13140 | and max_height will be zero. | |
1c9241f5 | 13141 | |
5f5c8ee5 GM |
13142 | 2. We have some glyphs that don't contribute to the line height. |
13143 | (The glyph row flag contributes_to_line_height_p is for future | |
13144 | pixmap extensions). | |
f6fd109b | 13145 | |
5f5c8ee5 GM |
13146 | The first case is easily covered by using default values because in |
13147 | these cases, the line height does not really matter, except that it | |
13148 | must not be zero. */ | |
67481ae5 | 13149 | |
5f5c8ee5 GM |
13150 | static void |
13151 | compute_line_metrics (it) | |
13152 | struct it *it; | |
13153 | { | |
13154 | struct glyph_row *row = it->glyph_row; | |
13155 | int area, i; | |
1c2250c2 | 13156 | |
5f5c8ee5 GM |
13157 | if (FRAME_WINDOW_P (it->f)) |
13158 | { | |
75c5350a | 13159 | int i, min_y, max_y; |
1c2250c2 | 13160 | |
5f5c8ee5 GM |
13161 | /* The line may consist of one space only, that was added to |
13162 | place the cursor on it. If so, the row's height hasn't been | |
13163 | computed yet. */ | |
13164 | if (row->height == 0) | |
13165 | { | |
13166 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 13167 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
13168 | row->ascent = it->max_ascent; |
13169 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
13170 | row->phys_ascent = it->max_phys_ascent; |
13171 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 | 13172 | } |
2311178e | 13173 | |
5f5c8ee5 GM |
13174 | /* Compute the width of this line. */ |
13175 | row->pixel_width = row->x; | |
13176 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
13177 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
13178 | ||
13179 | xassert (row->pixel_width >= 0); | |
13180 | xassert (row->ascent >= 0 && row->height > 0); | |
13181 | ||
312246d1 GM |
13182 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
13183 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
13184 | ||
13185 | /* If first line's physical ascent is larger than its logical | |
13186 | ascent, use the physical ascent, and make the row taller. | |
13187 | This makes accented characters fully visible. */ | |
b28cb6ed | 13188 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
13189 | && row->phys_ascent > row->ascent) |
13190 | { | |
13191 | row->height += row->phys_ascent - row->ascent; | |
13192 | row->ascent = row->phys_ascent; | |
13193 | } | |
13194 | ||
5f5c8ee5 GM |
13195 | /* Compute how much of the line is visible. */ |
13196 | row->visible_height = row->height; | |
2311178e | 13197 | |
75c5350a GM |
13198 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
13199 | max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
13200 | ||
13201 | if (row->y < min_y) | |
13202 | row->visible_height -= min_y - row->y; | |
13203 | if (row->y + row->height > max_y) | |
13204 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
13205 | } |
13206 | else | |
13207 | { | |
13208 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
13209 | if (row->continued_p) |
13210 | row->pixel_width -= it->continuation_pixel_width; | |
13211 | else if (row->truncated_on_right_p) | |
13212 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
13213 | row->ascent = row->phys_ascent = 0; |
13214 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 13215 | } |
67481ae5 | 13216 | |
5f5c8ee5 GM |
13217 | /* Compute a hash code for this row. */ |
13218 | row->hash = 0; | |
13219 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
13220 | for (i = 0; i < row->used[area]; ++i) | |
13221 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
13222 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
13223 | + row->glyphs[area][i].face_id |
13224 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 13225 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 13226 | |
5f5c8ee5 | 13227 | it->max_ascent = it->max_descent = 0; |
312246d1 | 13228 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 13229 | } |
12adba34 | 13230 | |
ca26e1c8 | 13231 | |
5f5c8ee5 GM |
13232 | /* Append one space to the glyph row of iterator IT if doing a |
13233 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
13234 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 13235 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
13236 | |
13237 | This function is called to make sure that there is always one glyph | |
13238 | at the end of a glyph row that the cursor can be set on under | |
13239 | window-systems. (If there weren't such a glyph we would not know | |
13240 | how wide and tall a box cursor should be displayed). | |
13241 | ||
13242 | At the same time this space let's a nicely handle clearing to the | |
13243 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 13244 | |
80c6cb1f | 13245 | static int |
5f5c8ee5 GM |
13246 | append_space (it, default_face_p) |
13247 | struct it *it; | |
13248 | int default_face_p; | |
13249 | { | |
13250 | if (FRAME_WINDOW_P (it->f)) | |
13251 | { | |
13252 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 13253 | |
5f5c8ee5 GM |
13254 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
13255 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 13256 | { |
cafafe0b GM |
13257 | /* Save some values that must not be changed. |
13258 | Must save IT->c and IT->len because otherwise | |
13259 | ITERATOR_AT_END_P wouldn't work anymore after | |
13260 | append_space has been called. */ | |
478d746b | 13261 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
13262 | int saved_c = it->c, saved_len = it->len; |
13263 | int saved_x = it->current_x; | |
5f5c8ee5 | 13264 | int saved_face_id = it->face_id; |
cafafe0b | 13265 | struct text_pos saved_pos; |
5f5c8ee5 | 13266 | Lisp_Object saved_object; |
980806b6 | 13267 | struct face *face; |
5f5c8ee5 GM |
13268 | |
13269 | saved_object = it->object; | |
13270 | saved_pos = it->position; | |
2311178e | 13271 | |
5f5c8ee5 GM |
13272 | it->what = IT_CHARACTER; |
13273 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 13274 | it->object = make_number (0); |
5f5c8ee5 GM |
13275 | it->c = ' '; |
13276 | it->len = 1; | |
5f5c8ee5 GM |
13277 | |
13278 | if (default_face_p) | |
13279 | it->face_id = DEFAULT_FACE_ID; | |
4aad61f8 GM |
13280 | else if (it->face_before_selective_p) |
13281 | it->face_id = it->saved_face_id; | |
980806b6 KH |
13282 | face = FACE_FROM_ID (it->f, it->face_id); |
13283 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 13284 | |
5f5c8ee5 | 13285 | PRODUCE_GLYPHS (it); |
2311178e | 13286 | |
5f5c8ee5 GM |
13287 | it->current_x = saved_x; |
13288 | it->object = saved_object; | |
13289 | it->position = saved_pos; | |
13290 | it->what = saved_what; | |
13291 | it->face_id = saved_face_id; | |
cafafe0b GM |
13292 | it->len = saved_len; |
13293 | it->c = saved_c; | |
80c6cb1f | 13294 | return 1; |
5f5c8ee5 GM |
13295 | } |
13296 | } | |
80c6cb1f GM |
13297 | |
13298 | return 0; | |
5f5c8ee5 | 13299 | } |
12adba34 | 13300 | |
1842fc1a | 13301 | |
5f5c8ee5 GM |
13302 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
13303 | to the end of the display line. Called from display_line. | |
13304 | If the glyph row is empty, add a space glyph to it so that we | |
13305 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
2311178e | 13306 | |
5f5c8ee5 GM |
13307 | static void |
13308 | extend_face_to_end_of_line (it) | |
13309 | struct it *it; | |
13310 | { | |
13311 | struct face *face; | |
13312 | struct frame *f = it->f; | |
1842fc1a | 13313 | |
5f5c8ee5 GM |
13314 | /* If line is already filled, do nothing. */ |
13315 | if (it->current_x >= it->last_visible_x) | |
13316 | return; | |
2311178e | 13317 | |
5f5c8ee5 GM |
13318 | /* Face extension extends the background and box of IT->face_id |
13319 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
13320 | of the frame, we don't have to do anything. */ |
13321 | if (it->face_before_selective_p) | |
13322 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
13323 | else | |
13324 | face = FACE_FROM_ID (f, it->face_id); | |
2311178e | 13325 | |
5f5c8ee5 GM |
13326 | if (FRAME_WINDOW_P (f) |
13327 | && face->box == FACE_NO_BOX | |
13328 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
13329 | && !face->stipple) | |
13330 | return; | |
1842fc1a | 13331 | |
5f5c8ee5 GM |
13332 | /* Set the glyph row flag indicating that the face of the last glyph |
13333 | in the text area has to be drawn to the end of the text area. */ | |
13334 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 13335 | |
980806b6 KH |
13336 | /* If current character of IT is not ASCII, make sure we have the |
13337 | ASCII face. This will be automatically undone the next time | |
13338 | get_next_display_element returns a multibyte character. Note | |
13339 | that the character will always be single byte in unibyte text. */ | |
13340 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 13341 | { |
980806b6 | 13342 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 13343 | } |
545e04f6 | 13344 | |
5f5c8ee5 GM |
13345 | if (FRAME_WINDOW_P (f)) |
13346 | { | |
13347 | /* If the row is empty, add a space with the current face of IT, | |
13348 | so that we know which face to draw. */ | |
13349 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 13350 | { |
5f5c8ee5 | 13351 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 13352 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 13353 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 13354 | } |
5f5c8ee5 GM |
13355 | } |
13356 | else | |
13357 | { | |
13358 | /* Save some values that must not be changed. */ | |
13359 | int saved_x = it->current_x; | |
13360 | struct text_pos saved_pos; | |
13361 | Lisp_Object saved_object; | |
478d746b | 13362 | enum display_element_type saved_what = it->what; |
4aad61f8 | 13363 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
13364 | |
13365 | saved_object = it->object; | |
13366 | saved_pos = it->position; | |
2311178e | 13367 | |
5f5c8ee5 GM |
13368 | it->what = IT_CHARACTER; |
13369 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 13370 | it->object = make_number (0); |
5f5c8ee5 GM |
13371 | it->c = ' '; |
13372 | it->len = 1; | |
4aad61f8 | 13373 | it->face_id = face->id; |
2311178e | 13374 | |
5f5c8ee5 | 13375 | PRODUCE_GLYPHS (it); |
2311178e | 13376 | |
5f5c8ee5 GM |
13377 | while (it->current_x <= it->last_visible_x) |
13378 | PRODUCE_GLYPHS (it); | |
2311178e | 13379 | |
5f5c8ee5 GM |
13380 | /* Don't count these blanks really. It would let us insert a left |
13381 | truncation glyph below and make us set the cursor on them, maybe. */ | |
13382 | it->current_x = saved_x; | |
13383 | it->object = saved_object; | |
13384 | it->position = saved_pos; | |
13385 | it->what = saved_what; | |
4aad61f8 | 13386 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
13387 | } |
13388 | } | |
12adba34 | 13389 | |
545e04f6 | 13390 | |
5f5c8ee5 GM |
13391 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
13392 | trailing whitespace. */ | |
1c9241f5 | 13393 | |
5f5c8ee5 GM |
13394 | static int |
13395 | trailing_whitespace_p (charpos) | |
13396 | int charpos; | |
13397 | { | |
13398 | int bytepos = CHAR_TO_BYTE (charpos); | |
13399 | int c = 0; | |
7bbe686f | 13400 | |
5f5c8ee5 GM |
13401 | while (bytepos < ZV_BYTE |
13402 | && (c = FETCH_CHAR (bytepos), | |
13403 | c == ' ' || c == '\t')) | |
13404 | ++bytepos; | |
0d09d1e6 | 13405 | |
8f897821 GM |
13406 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
13407 | { | |
13408 | if (bytepos != PT_BYTE) | |
13409 | return 1; | |
13410 | } | |
13411 | return 0; | |
5f5c8ee5 | 13412 | } |
31b24551 | 13413 | |
545e04f6 | 13414 | |
5f5c8ee5 | 13415 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 13416 | |
5f5c8ee5 GM |
13417 | void |
13418 | highlight_trailing_whitespace (f, row) | |
13419 | struct frame *f; | |
13420 | struct glyph_row *row; | |
13421 | { | |
13422 | int used = row->used[TEXT_AREA]; | |
2311178e | 13423 | |
5f5c8ee5 GM |
13424 | if (used) |
13425 | { | |
13426 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
13427 | struct glyph *glyph = start + used - 1; | |
13428 | ||
ade0bee1 GM |
13429 | /* Skip over glyphs inserted to display the cursor at the |
13430 | end of a line, for extending the face of the last glyph | |
13431 | to the end of the line on terminals, and for truncation | |
13432 | and continuation glyphs. */ | |
65008712 GM |
13433 | while (glyph >= start |
13434 | && glyph->type == CHAR_GLYPH | |
65008712 | 13435 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
13436 | --glyph; |
13437 | ||
13438 | /* If last glyph is a space or stretch, and it's trailing | |
13439 | whitespace, set the face of all trailing whitespace glyphs in | |
13440 | IT->glyph_row to `trailing-whitespace'. */ | |
13441 | if (glyph >= start | |
13442 | && BUFFERP (glyph->object) | |
13443 | && (glyph->type == STRETCH_GLYPH | |
13444 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 13445 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 13446 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 13447 | { |
980806b6 | 13448 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
2311178e | 13449 | |
5f5c8ee5 GM |
13450 | while (glyph >= start |
13451 | && BUFFERP (glyph->object) | |
13452 | && (glyph->type == STRETCH_GLYPH | |
13453 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
13454 | && glyph->u.ch == ' '))) |
13455 | (glyph--)->face_id = face_id; | |
545e04f6 | 13456 | } |
a2889657 | 13457 | } |
5f5c8ee5 | 13458 | } |
a2889657 | 13459 | |
5fcbb24d | 13460 | |
cafafe0b | 13461 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 13462 | used to hold the cursor. */ |
cafafe0b GM |
13463 | |
13464 | static int | |
13465 | cursor_row_p (w, row) | |
13466 | struct window *w; | |
13467 | struct glyph_row *row; | |
13468 | { | |
9a038881 | 13469 | int cursor_row_p = 1; |
2311178e | 13470 | |
cafafe0b GM |
13471 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
13472 | { | |
9a038881 GM |
13473 | /* If the row ends with a newline from a string, we don't want |
13474 | the cursor there (if the row is continued it doesn't end in a | |
13475 | newline). */ | |
13476 | if (CHARPOS (row->end.string_pos) >= 0 | |
13477 | || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
13478 | cursor_row_p = row->continued_p; | |
13479 | ||
13480 | /* If the row ends at ZV, display the cursor at the end of that | |
13481 | row instead of at the start of the row below. */ | |
13482 | else if (row->ends_at_zv_p) | |
13483 | cursor_row_p = 1; | |
13484 | else | |
13485 | cursor_row_p = 0; | |
cafafe0b GM |
13486 | } |
13487 | ||
9a038881 | 13488 | return cursor_row_p; |
cafafe0b GM |
13489 | } |
13490 | ||
13491 | ||
5f5c8ee5 GM |
13492 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
13493 | IT->w from text at the current position of IT. See dispextern.h | |
13494 | for an overview of struct it. Value is non-zero if | |
13495 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
13496 | only. */ | |
2311178e | 13497 | |
5f5c8ee5 GM |
13498 | static int |
13499 | display_line (it) | |
13500 | struct it *it; | |
13501 | { | |
13502 | struct glyph_row *row = it->glyph_row; | |
13503 | ||
13504 | /* We always start displaying at hpos zero even if hscrolled. */ | |
13505 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 13506 | |
5f5c8ee5 GM |
13507 | /* We must not display in a row that's not a text row. */ |
13508 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
13509 | < it->w->desired_matrix->nrows); | |
12adba34 | 13510 | |
5f5c8ee5 GM |
13511 | /* Is IT->w showing the region? */ |
13512 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 13513 | |
5f5c8ee5 GM |
13514 | /* Clear the result glyph row and enable it. */ |
13515 | prepare_desired_row (row); | |
12adba34 | 13516 | |
5f5c8ee5 GM |
13517 | row->y = it->current_y; |
13518 | row->start = it->current; | |
13519 | row->continuation_lines_width = it->continuation_lines_width; | |
13520 | row->displays_text_p = 1; | |
91004049 GM |
13521 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
13522 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
13523 | |
13524 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
13525 | display_line on only one line at a time, in which case this | |
13526 | can't really hurt too much, or we call it on lines which appear | |
13527 | one after another in the buffer, in which case all calls to | |
13528 | recenter_overlay_lists but the first will be pretty cheap. */ | |
13529 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
13530 | ||
5f5c8ee5 GM |
13531 | /* Move over display elements that are not visible because we are |
13532 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
13533 | if the first glyph is partially visible or if we hit a line end. */ | |
13534 | if (it->current_x < it->first_visible_x) | |
13535 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
13536 | MOVE_TO_POS | MOVE_TO_X); | |
13537 | ||
13538 | /* Get the initial row height. This is either the height of the | |
13539 | text hscrolled, if there is any, or zero. */ | |
13540 | row->ascent = it->max_ascent; | |
13541 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
13542 | row->phys_ascent = it->max_phys_ascent; |
13543 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
13544 | |
13545 | /* Loop generating characters. The loop is left with IT on the next | |
13546 | character to display. */ | |
13547 | while (1) | |
13548 | { | |
13549 | int n_glyphs_before, hpos_before, x_before; | |
13550 | int x, i, nglyphs; | |
ae26e27d | 13551 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 13552 | |
5f5c8ee5 GM |
13553 | /* Retrieve the next thing to display. Value is zero if end of |
13554 | buffer reached. */ | |
13555 | if (!get_next_display_element (it)) | |
13556 | { | |
13557 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
13558 | display the cursor there under X. Set the charpos of the |
13559 | first glyph of blank lines not corresponding to any text | |
13560 | to -1. */ | |
13561 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
13562 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 13563 | { |
5f5c8ee5 GM |
13564 | row->glyphs[TEXT_AREA]->charpos = -1; |
13565 | row->displays_text_p = 0; | |
13566 | ||
2ad551af | 13567 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
13568 | && (!MINI_WINDOW_P (it->w) |
13569 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 13570 | row->indicate_empty_line_p = 1; |
a2889657 | 13571 | } |
2311178e | 13572 | |
5f5c8ee5 GM |
13573 | it->continuation_lines_width = 0; |
13574 | row->ends_at_zv_p = 1; | |
13575 | break; | |
a2889657 | 13576 | } |
a2889657 | 13577 | |
5f5c8ee5 GM |
13578 | /* Now, get the metrics of what we want to display. This also |
13579 | generates glyphs in `row' (which is IT->glyph_row). */ | |
13580 | n_glyphs_before = row->used[TEXT_AREA]; | |
13581 | x = it->current_x; | |
e6819faf GM |
13582 | |
13583 | /* Remember the line height so far in case the next element doesn't | |
13584 | fit on the line. */ | |
13585 | if (!it->truncate_lines_p) | |
13586 | { | |
13587 | ascent = it->max_ascent; | |
13588 | descent = it->max_descent; | |
13589 | phys_ascent = it->max_phys_ascent; | |
13590 | phys_descent = it->max_phys_descent; | |
13591 | } | |
2311178e | 13592 | |
5f5c8ee5 | 13593 | PRODUCE_GLYPHS (it); |
a2889657 | 13594 | |
5f5c8ee5 GM |
13595 | /* If this display element was in marginal areas, continue with |
13596 | the next one. */ | |
13597 | if (it->area != TEXT_AREA) | |
a2889657 | 13598 | { |
5f5c8ee5 GM |
13599 | row->ascent = max (row->ascent, it->max_ascent); |
13600 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13601 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13602 | row->phys_height = max (row->phys_height, | |
13603 | it->max_phys_ascent + it->max_phys_descent); | |
cafafe0b | 13604 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13605 | continue; |
13606 | } | |
5936754e | 13607 | |
5f5c8ee5 GM |
13608 | /* Does the display element fit on the line? If we truncate |
13609 | lines, we should draw past the right edge of the window. If | |
13610 | we don't truncate, we want to stop so that we can display the | |
13611 | continuation glyph before the right margin. If lines are | |
13612 | continued, there are two possible strategies for characters | |
13613 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
13614 | glyphs as possible in this line and leave the rest for the | |
13615 | continuation line, or display the whole element in the next | |
13616 | line. Original redisplay did the former, so we do it also. */ | |
13617 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
13618 | hpos_before = it->hpos; | |
13619 | x_before = x; | |
4dcd74e6 | 13620 | |
4b41cebb | 13621 | if (/* Not a newline. */ |
4dcd74e6 | 13622 | nglyphs > 0 |
202c1b5b | 13623 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
13624 | && it->current_x < it->last_visible_x) |
13625 | { | |
37be86f2 | 13626 | it->hpos += nglyphs; |
5f5c8ee5 GM |
13627 | row->ascent = max (row->ascent, it->max_ascent); |
13628 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13629 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13630 | row->phys_height = max (row->phys_height, | |
13631 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13632 | if (it->current_x - it->pixel_width < it->first_visible_x) |
13633 | row->x = x - it->first_visible_x; | |
13634 | } | |
13635 | else | |
13636 | { | |
13637 | int new_x; | |
13638 | struct glyph *glyph; | |
2311178e | 13639 | |
5f5c8ee5 | 13640 | for (i = 0; i < nglyphs; ++i, x = new_x) |
b5bbc9a5 | 13641 | { |
5f5c8ee5 GM |
13642 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
13643 | new_x = x + glyph->pixel_width; | |
13644 | ||
13645 | if (/* Lines are continued. */ | |
13646 | !it->truncate_lines_p | |
13647 | && (/* Glyph doesn't fit on the line. */ | |
13648 | new_x > it->last_visible_x | |
13649 | /* Or it fits exactly on a window system frame. */ | |
13650 | || (new_x == it->last_visible_x | |
13651 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 13652 | { |
5f5c8ee5 | 13653 | /* End of a continued line. */ |
2311178e | 13654 | |
5f5c8ee5 GM |
13655 | if (it->hpos == 0 |
13656 | || (new_x == it->last_visible_x | |
13657 | && FRAME_WINDOW_P (it->f))) | |
13658 | { | |
e6819faf GM |
13659 | /* Current glyph is the only one on the line or |
13660 | fits exactly on the line. We must continue | |
13661 | the line because we can't draw the cursor | |
13662 | after the glyph. */ | |
5f5c8ee5 GM |
13663 | row->continued_p = 1; |
13664 | it->current_x = new_x; | |
13665 | it->continuation_lines_width += new_x; | |
13666 | ++it->hpos; | |
13667 | if (i == nglyphs - 1) | |
cafafe0b | 13668 | set_iterator_to_next (it, 1); |
5f5c8ee5 | 13669 | } |
3b3c4bf0 GM |
13670 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
13671 | && !FRAME_WINDOW_P (it->f)) | |
13672 | { | |
13673 | /* A padding glyph that doesn't fit on this line. | |
13674 | This means the whole character doesn't fit | |
13675 | on the line. */ | |
13676 | row->used[TEXT_AREA] = n_glyphs_before; | |
2311178e | 13677 | |
3b3c4bf0 GM |
13678 | /* Fill the rest of the row with continuation |
13679 | glyphs like in 20.x. */ | |
13680 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
13681 | < row->glyphs[1 + TEXT_AREA]) | |
13682 | produce_special_glyphs (it, IT_CONTINUATION); | |
2311178e | 13683 | |
3b3c4bf0 GM |
13684 | row->continued_p = 1; |
13685 | it->current_x = x_before; | |
13686 | it->continuation_lines_width += x_before; | |
2311178e | 13687 | |
3b3c4bf0 GM |
13688 | /* Restore the height to what it was before the |
13689 | element not fitting on the line. */ | |
13690 | it->max_ascent = ascent; | |
13691 | it->max_descent = descent; | |
13692 | it->max_phys_ascent = phys_ascent; | |
13693 | it->max_phys_descent = phys_descent; | |
13694 | } | |
0df56f4d GM |
13695 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
13696 | { | |
13697 | /* A TAB that extends past the right edge of the | |
13698 | window. This produces a single glyph on | |
13699 | window system frames. We leave the glyph in | |
13700 | this row and let it fill the row, but don't | |
13701 | consume the TAB. */ | |
13702 | it->continuation_lines_width += it->last_visible_x; | |
13703 | row->ends_in_middle_of_char_p = 1; | |
13704 | row->continued_p = 1; | |
13705 | glyph->pixel_width = it->last_visible_x - x; | |
13706 | it->starts_in_middle_of_char_p = 1; | |
13707 | } | |
5f5c8ee5 | 13708 | else |
5936754e | 13709 | { |
0df56f4d GM |
13710 | /* Something other than a TAB that draws past |
13711 | the right edge of the window. Restore | |
13712 | positions to values before the element. */ | |
5f5c8ee5 | 13713 | row->used[TEXT_AREA] = n_glyphs_before + i; |
2311178e | 13714 | |
5f5c8ee5 GM |
13715 | /* Display continuation glyphs. */ |
13716 | if (!FRAME_WINDOW_P (it->f)) | |
13717 | produce_special_glyphs (it, IT_CONTINUATION); | |
13718 | row->continued_p = 1; | |
653c329b | 13719 | |
0df56f4d | 13720 | it->continuation_lines_width += x; |
2311178e | 13721 | |
91004049 GM |
13722 | if (nglyphs > 1 && i > 0) |
13723 | { | |
13724 | row->ends_in_middle_of_char_p = 1; | |
13725 | it->starts_in_middle_of_char_p = 1; | |
13726 | } | |
2311178e | 13727 | |
e6819faf GM |
13728 | /* Restore the height to what it was before the |
13729 | element not fitting on the line. */ | |
13730 | it->max_ascent = ascent; | |
13731 | it->max_descent = descent; | |
13732 | it->max_phys_ascent = phys_ascent; | |
13733 | it->max_phys_descent = phys_descent; | |
5936754e | 13734 | } |
e6819faf | 13735 | |
5f5c8ee5 GM |
13736 | break; |
13737 | } | |
13738 | else if (new_x > it->first_visible_x) | |
13739 | { | |
13740 | /* Increment number of glyphs actually displayed. */ | |
13741 | ++it->hpos; | |
2311178e | 13742 | |
5f5c8ee5 GM |
13743 | if (x < it->first_visible_x) |
13744 | /* Glyph is partially visible, i.e. row starts at | |
13745 | negative X position. */ | |
13746 | row->x = x - it->first_visible_x; | |
13747 | } | |
13748 | else | |
13749 | { | |
13750 | /* Glyph is completely off the left margin of the | |
13751 | window. This should not happen because of the | |
72b8c434 RS |
13752 | move_it_in_display_line at the start of this |
13753 | function, unless the text display area of the | |
13754 | window is empty. */ | |
13755 | xassert (it->first_visible_x <= it->last_visible_x); | |
a2889657 | 13756 | } |
a2889657 | 13757 | } |
2311178e | 13758 | |
5f5c8ee5 GM |
13759 | row->ascent = max (row->ascent, it->max_ascent); |
13760 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13761 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13762 | row->phys_height = max (row->phys_height, | |
13763 | it->max_phys_ascent + it->max_phys_descent); | |
2311178e | 13764 | |
5f5c8ee5 GM |
13765 | /* End of this display line if row is continued. */ |
13766 | if (row->continued_p) | |
13767 | break; | |
a2889657 | 13768 | } |
a2889657 | 13769 | |
5f5c8ee5 GM |
13770 | /* Is this a line end? If yes, we're also done, after making |
13771 | sure that a non-default face is extended up to the right | |
13772 | margin of the window. */ | |
13773 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 13774 | { |
5f5c8ee5 GM |
13775 | int used_before = row->used[TEXT_AREA]; |
13776 | ||
e74fb0f7 GM |
13777 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
13778 | ||
5f5c8ee5 GM |
13779 | /* Add a space at the end of the line that is used to |
13780 | display the cursor there. */ | |
13781 | append_space (it, 0); | |
2311178e | 13782 | |
5f5c8ee5 GM |
13783 | /* Extend the face to the end of the line. */ |
13784 | extend_face_to_end_of_line (it); | |
13785 | ||
13786 | /* Make sure we have the position. */ | |
13787 | if (used_before == 0) | |
13788 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
2311178e | 13789 | |
5f5c8ee5 | 13790 | /* Consume the line end. This skips over invisible lines. */ |
cafafe0b | 13791 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13792 | it->continuation_lines_width = 0; |
13793 | break; | |
1c9241f5 | 13794 | } |
a2889657 | 13795 | |
2311178e | 13796 | /* Proceed with next display element. Note that this skips |
5f5c8ee5 | 13797 | over lines invisible because of selective display. */ |
cafafe0b | 13798 | set_iterator_to_next (it, 1); |
b1d1124b | 13799 | |
5f5c8ee5 GM |
13800 | /* If we truncate lines, we are done when the last displayed |
13801 | glyphs reach past the right margin of the window. */ | |
13802 | if (it->truncate_lines_p | |
13803 | && (FRAME_WINDOW_P (it->f) | |
13804 | ? (it->current_x >= it->last_visible_x) | |
13805 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 13806 | { |
5f5c8ee5 GM |
13807 | /* Maybe add truncation glyphs. */ |
13808 | if (!FRAME_WINDOW_P (it->f)) | |
13809 | { | |
a98b5ed9 | 13810 | int i, n; |
2311178e | 13811 | |
a98b5ed9 GM |
13812 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
13813 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
13814 | break; | |
13815 | ||
13816 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
13817 | { | |
13818 | row->used[TEXT_AREA] = i; | |
13819 | produce_special_glyphs (it, IT_TRUNCATION); | |
13820 | } | |
5f5c8ee5 | 13821 | } |
2311178e | 13822 | |
5f5c8ee5 GM |
13823 | row->truncated_on_right_p = 1; |
13824 | it->continuation_lines_width = 0; | |
312246d1 | 13825 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
13826 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
13827 | it->hpos = hpos_before; | |
13828 | it->current_x = x_before; | |
13829 | break; | |
75d13c64 | 13830 | } |
a2889657 | 13831 | } |
a2889657 | 13832 | |
5f5c8ee5 GM |
13833 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
13834 | at the left window margin. */ | |
13835 | if (it->first_visible_x | |
13836 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
13837 | { | |
13838 | if (!FRAME_WINDOW_P (it->f)) | |
13839 | insert_left_trunc_glyphs (it); | |
13840 | row->truncated_on_left_p = 1; | |
13841 | } | |
a2889657 | 13842 | |
5f5c8ee5 GM |
13843 | /* If the start of this line is the overlay arrow-position, then |
13844 | mark this glyph row as the one containing the overlay arrow. | |
13845 | This is clearly a mess with variable size fonts. It would be | |
13846 | better to let it be displayed like cursors under X. */ | |
e24c997d | 13847 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 13848 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
13849 | && (MATRIX_ROW_START_CHARPOS (row) |
13850 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 13851 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
13852 | && ! overlay_arrow_seen) |
13853 | { | |
b46952ae | 13854 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
5f5c8ee5 | 13855 | if (!FRAME_WINDOW_P (it->f)) |
c4628384 | 13856 | { |
5f5c8ee5 GM |
13857 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
13858 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
13859 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
13860 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
13861 | struct glyph *p2, *end; | |
13862 | ||
13863 | /* Copy the arrow glyphs. */ | |
13864 | while (glyph < arrow_end) | |
13865 | *p++ = *glyph++; | |
13866 | ||
13867 | /* Throw away padding glyphs. */ | |
13868 | p2 = p; | |
13869 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
13870 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
13871 | ++p2; | |
13872 | if (p2 > p) | |
212e4f87 | 13873 | { |
5f5c8ee5 GM |
13874 | while (p2 < end) |
13875 | *p++ = *p2++; | |
13876 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 13877 | } |
c4628384 | 13878 | } |
2311178e | 13879 | |
a2889657 | 13880 | overlay_arrow_seen = 1; |
5f5c8ee5 | 13881 | row->overlay_arrow_p = 1; |
a2889657 JB |
13882 | } |
13883 | ||
5f5c8ee5 GM |
13884 | /* Compute pixel dimensions of this line. */ |
13885 | compute_line_metrics (it); | |
13886 | ||
13887 | /* Remember the position at which this line ends. */ | |
13888 | row->end = it->current; | |
13889 | ||
173cbca8 | 13890 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
13891 | if (it->w->cursor.vpos < 0 |
13892 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
13893 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
13894 | && cursor_row_p (it->w, row)) | |
13895 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
13896 | |
13897 | /* Highlight trailing whitespace. */ | |
8f897821 | 13898 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
13899 | highlight_trailing_whitespace (it->f, it->glyph_row); |
13900 | ||
13901 | /* Prepare for the next line. This line starts horizontally at (X | |
13902 | HPOS) = (0 0). Vertical positions are incremented. As a | |
13903 | convenience for the caller, IT->glyph_row is set to the next | |
13904 | row to be used. */ | |
13905 | it->current_x = it->hpos = 0; | |
13906 | it->current_y += row->height; | |
13907 | ++it->vpos; | |
13908 | ++it->glyph_row; | |
13909 | return row->displays_text_p; | |
a2889657 | 13910 | } |
5f5c8ee5 GM |
13911 | |
13912 | ||
a2889657 | 13913 | \f |
5f5c8ee5 GM |
13914 | /*********************************************************************** |
13915 | Menu Bar | |
13916 | ***********************************************************************/ | |
13917 | ||
13918 | /* Redisplay the menu bar in the frame for window W. | |
13919 | ||
13920 | The menu bar of X frames that don't have X toolkit support is | |
13921 | displayed in a special window W->frame->menu_bar_window. | |
2311178e | 13922 | |
5f5c8ee5 GM |
13923 | The menu bar of terminal frames is treated specially as far as |
13924 | glyph matrices are concerned. Menu bar lines are not part of | |
13925 | windows, so the update is done directly on the frame matrix rows | |
13926 | for the menu bar. */ | |
7ce2c095 RS |
13927 | |
13928 | static void | |
13929 | display_menu_bar (w) | |
13930 | struct window *w; | |
13931 | { | |
5f5c8ee5 GM |
13932 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
13933 | struct it it; | |
13934 | Lisp_Object items; | |
8351baf2 | 13935 | int i; |
7ce2c095 | 13936 | |
5f5c8ee5 | 13937 | /* Don't do all this for graphical frames. */ |
dc937613 | 13938 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
13939 | if (!NILP (Vwindow_system)) |
13940 | return; | |
dc937613 | 13941 | #endif |
488dd4c4 | 13942 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
d3413a53 | 13943 | if (FRAME_X_P (f)) |
7ce2c095 | 13944 | return; |
5f5c8ee5 | 13945 | #endif |
e0f712ba | 13946 | #ifdef MAC_OS |
1a578e9b AC |
13947 | if (FRAME_MAC_P (f)) |
13948 | return; | |
13949 | #endif | |
5f5c8ee5 GM |
13950 | |
13951 | #ifdef USE_X_TOOLKIT | |
13952 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 13953 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
13954 | it.first_visible_x = 0; |
13955 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13956 | #else /* not USE_X_TOOLKIT */ | |
13957 | if (FRAME_WINDOW_P (f)) | |
13958 | { | |
13959 | /* Menu bar lines are displayed in the desired matrix of the | |
13960 | dummy window menu_bar_window. */ | |
13961 | struct window *menu_w; | |
13962 | xassert (WINDOWP (f->menu_bar_window)); | |
13963 | menu_w = XWINDOW (f->menu_bar_window); | |
13964 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 13965 | MENU_FACE_ID); |
5f5c8ee5 GM |
13966 | it.first_visible_x = 0; |
13967 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13968 | } | |
13969 | else | |
13970 | { | |
13971 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
13972 | pixel x/y. */ | |
13973 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 13974 | MENU_FACE_ID); |
5f5c8ee5 GM |
13975 | it.first_visible_x = 0; |
13976 | it.last_visible_x = FRAME_WIDTH (f); | |
13977 | } | |
13978 | #endif /* not USE_X_TOOLKIT */ | |
13979 | ||
1862a24e MB |
13980 | if (! mode_line_inverse_video) |
13981 | /* Force the menu-bar to be displayed in the default face. */ | |
13982 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13983 | ||
5f5c8ee5 GM |
13984 | /* Clear all rows of the menu bar. */ |
13985 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
13986 | { | |
13987 | struct glyph_row *row = it.glyph_row + i; | |
13988 | clear_glyph_row (row); | |
13989 | row->enabled_p = 1; | |
13990 | row->full_width_p = 1; | |
13991 | } | |
7ce2c095 | 13992 | |
5f5c8ee5 GM |
13993 | /* Display all items of the menu bar. */ |
13994 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 13995 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 13996 | { |
5f5c8ee5 GM |
13997 | Lisp_Object string; |
13998 | ||
13999 | /* Stop at nil string. */ | |
a61b7058 | 14000 | string = AREF (items, i + 1); |
8351baf2 RS |
14001 | if (NILP (string)) |
14002 | break; | |
2d66ad19 | 14003 | |
5f5c8ee5 | 14004 | /* Remember where item was displayed. */ |
a61b7058 | 14005 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 14006 | |
5f5c8ee5 GM |
14007 | /* Display the item, pad with one space. */ |
14008 | if (it.current_x < it.last_visible_x) | |
14009 | display_string (NULL, string, Qnil, 0, 0, &it, | |
2051c264 | 14010 | SCHARS (string) + 1, 0, 0, -1); |
7ce2c095 RS |
14011 | } |
14012 | ||
2d66ad19 | 14013 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
14014 | if (it.current_x < it.last_visible_x) |
14015 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 14016 | |
5f5c8ee5 GM |
14017 | /* Compute the total height of the lines. */ |
14018 | compute_line_metrics (&it); | |
7ce2c095 | 14019 | } |
5f5c8ee5 GM |
14020 | |
14021 | ||
7ce2c095 | 14022 | \f |
5f5c8ee5 GM |
14023 | /*********************************************************************** |
14024 | Mode Line | |
14025 | ***********************************************************************/ | |
14026 | ||
715e84c9 GM |
14027 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
14028 | FORCE is non-zero, redisplay mode lines unconditionally. | |
14029 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
14030 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 14031 | |
715e84c9 GM |
14032 | static int |
14033 | redisplay_mode_lines (window, force) | |
14034 | Lisp_Object window; | |
14035 | int force; | |
14036 | { | |
14037 | int nwindows = 0; | |
2311178e | 14038 | |
715e84c9 GM |
14039 | while (!NILP (window)) |
14040 | { | |
14041 | struct window *w = XWINDOW (window); | |
2311178e | 14042 | |
715e84c9 GM |
14043 | if (WINDOWP (w->hchild)) |
14044 | nwindows += redisplay_mode_lines (w->hchild, force); | |
14045 | else if (WINDOWP (w->vchild)) | |
14046 | nwindows += redisplay_mode_lines (w->vchild, force); | |
14047 | else if (force | |
14048 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
14049 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
14050 | { | |
715e84c9 GM |
14051 | struct text_pos lpoint; |
14052 | struct buffer *old = current_buffer; | |
14053 | ||
14054 | /* Set the window's buffer for the mode line display. */ | |
14055 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
14056 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
2311178e | 14057 | |
715e84c9 GM |
14058 | /* Point refers normally to the selected window. For any |
14059 | other window, set up appropriate value. */ | |
14060 | if (!EQ (window, selected_window)) | |
14061 | { | |
14062 | struct text_pos pt; | |
2311178e | 14063 | |
715e84c9 GM |
14064 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); |
14065 | if (CHARPOS (pt) < BEGV) | |
14066 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
14067 | else if (CHARPOS (pt) > (ZV - 1)) | |
14068 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
14069 | else | |
14070 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
14071 | } | |
14072 | ||
715e84c9 GM |
14073 | /* Display mode lines. */ |
14074 | clear_glyph_matrix (w->desired_matrix); | |
14075 | if (display_mode_lines (w)) | |
14076 | { | |
14077 | ++nwindows; | |
14078 | w->must_be_updated_p = 1; | |
14079 | } | |
14080 | ||
14081 | /* Restore old settings. */ | |
715e84c9 GM |
14082 | set_buffer_internal_1 (old); |
14083 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
14084 | } | |
14085 | ||
14086 | window = w->next; | |
14087 | } | |
14088 | ||
14089 | return nwindows; | |
14090 | } | |
14091 | ||
14092 | ||
14093 | /* Display the mode and/or top line of window W. Value is the number | |
14094 | of mode lines displayed. */ | |
14095 | ||
14096 | static int | |
5f5c8ee5 | 14097 | display_mode_lines (w) |
a2889657 JB |
14098 | struct window *w; |
14099 | { | |
edd1e654 | 14100 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 14101 | int n = 0; |
edd1e654 GM |
14102 | |
14103 | old_selected_frame = selected_frame; | |
14104 | selected_frame = w->frame; | |
14105 | old_selected_window = selected_window; | |
14106 | XSETWINDOW (selected_window, w); | |
2311178e | 14107 | |
5f5c8ee5 | 14108 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 14109 | line_number_displayed = 0; |
155ef550 | 14110 | w->column_number_displayed = Qnil; |
aa6d10fa | 14111 | |
5f5c8ee5 | 14112 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 | 14113 | { |
c96e83bf | 14114 | struct window *sel_w = XWINDOW (old_selected_window); |
f87c0a98 | 14115 | |
96d2320f | 14116 | /* Select mode line face based on the real selected window. */ |
c96e83bf | 14117 | display_mode_line (w, CURRENT_MODE_LINE_FACE_ID_3 (sel_w, sel_w, w), |
715e84c9 GM |
14118 | current_buffer->mode_line_format); |
14119 | ++n; | |
14120 | } | |
2311178e | 14121 | |
045dee35 | 14122 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
14123 | { |
14124 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
14125 | current_buffer->header_line_format); | |
14126 | ++n; | |
14127 | } | |
14128 | ||
edd1e654 GM |
14129 | selected_frame = old_selected_frame; |
14130 | selected_window = old_selected_window; | |
715e84c9 | 14131 | return n; |
5f5c8ee5 | 14132 | } |
03b294dc | 14133 | |
03b294dc | 14134 | |
5f5c8ee5 | 14135 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 14136 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
14137 | FORMAT is the mode line format to display. Value is the pixel |
14138 | height of the mode line displayed. */ | |
03b294dc | 14139 | |
04612a64 | 14140 | static int |
5f5c8ee5 GM |
14141 | display_mode_line (w, face_id, format) |
14142 | struct window *w; | |
14143 | enum face_id face_id; | |
14144 | Lisp_Object format; | |
14145 | { | |
14146 | struct it it; | |
14147 | struct face *face; | |
03b294dc | 14148 | |
5f5c8ee5 GM |
14149 | init_iterator (&it, w, -1, -1, NULL, face_id); |
14150 | prepare_desired_row (it.glyph_row); | |
14151 | ||
1862a24e MB |
14152 | if (! mode_line_inverse_video) |
14153 | /* Force the mode-line to be displayed in the default face. */ | |
14154 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
14155 | ||
5f5c8ee5 GM |
14156 | /* Temporarily make frame's keyboard the current kboard so that |
14157 | kboard-local variables in the mode_line_format will get the right | |
14158 | values. */ | |
14159 | push_frame_kboard (it.f); | |
c53a1624 | 14160 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); |
5f5c8ee5 | 14161 | pop_frame_kboard (); |
a2889657 | 14162 | |
5f5c8ee5 GM |
14163 | /* Fill up with spaces. */ |
14164 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
2311178e | 14165 | |
5f5c8ee5 GM |
14166 | compute_line_metrics (&it); |
14167 | it.glyph_row->full_width_p = 1; | |
14168 | it.glyph_row->mode_line_p = 1; | |
5f5c8ee5 GM |
14169 | it.glyph_row->continued_p = 0; |
14170 | it.glyph_row->truncated_on_left_p = 0; | |
14171 | it.glyph_row->truncated_on_right_p = 0; | |
14172 | ||
14173 | /* Make a 3D mode-line have a shadow at its right end. */ | |
14174 | face = FACE_FROM_ID (it.f, face_id); | |
14175 | extend_face_to_end_of_line (&it); | |
14176 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 14177 | { |
5f5c8ee5 GM |
14178 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
14179 | + it.glyph_row->used[TEXT_AREA] - 1); | |
14180 | last->right_box_line_p = 1; | |
d7eb09a0 | 14181 | } |
04612a64 GM |
14182 | |
14183 | return it.glyph_row->height; | |
a2889657 JB |
14184 | } |
14185 | ||
0fcf414f RS |
14186 | /* Alist that caches the results of :propertize. |
14187 | Each element is (PROPERTIZED-STRING . PROPERTY-LIST). */ | |
14188 | Lisp_Object mode_line_proptrans_alist; | |
a2889657 | 14189 | |
fec8f23e KS |
14190 | /* List of strings making up the mode-line. */ |
14191 | Lisp_Object mode_line_string_list; | |
14192 | ||
14193 | /* Base face property when building propertized mode line string. */ | |
14194 | static Lisp_Object mode_line_string_face; | |
14195 | static Lisp_Object mode_line_string_face_prop; | |
14196 | ||
14197 | ||
5f5c8ee5 GM |
14198 | /* Contribute ELT to the mode line for window IT->w. How it |
14199 | translates into text depends on its data type. | |
a2889657 | 14200 | |
5f5c8ee5 | 14201 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
14202 | |
14203 | DEPTH is the depth in recursion. It is used to prevent | |
14204 | infinite recursion here. | |
14205 | ||
5f5c8ee5 GM |
14206 | FIELD_WIDTH is the number of characters the display of ELT should |
14207 | occupy in the mode line, and PRECISION is the maximum number of | |
14208 | characters to display from ELT's representation. See | |
b8523839 | 14209 | display_string for details. |
a2889657 | 14210 | |
c53a1624 RS |
14211 | Returns the hpos of the end of the text generated by ELT. |
14212 | ||
14213 | PROPS is a property list to add to any string we encounter. | |
14214 | ||
7d0393cf | 14215 | If RISKY is nonzero, remove (disregard) any properties in any string |
93da8435 SM |
14216 | we encounter, and ignore :eval and :propertize. |
14217 | ||
14218 | If the global variable `frame_title_ptr' is non-NULL, then the output | |
14219 | is passed to `store_frame_title' instead of `display_string'. */ | |
a2889657 JB |
14220 | |
14221 | static int | |
c53a1624 | 14222 | display_mode_element (it, depth, field_width, precision, elt, props, risky) |
5f5c8ee5 | 14223 | struct it *it; |
a2889657 | 14224 | int depth; |
5f5c8ee5 | 14225 | int field_width, precision; |
0fcf414f | 14226 | Lisp_Object elt, props; |
c53a1624 | 14227 | int risky; |
a2889657 | 14228 | { |
5f5c8ee5 | 14229 | int n = 0, field, prec; |
0fcf414f | 14230 | int literal = 0; |
5f5c8ee5 | 14231 | |
a2889657 JB |
14232 | tail_recurse: |
14233 | if (depth > 10) | |
14234 | goto invalid; | |
14235 | ||
14236 | depth++; | |
14237 | ||
0220c518 | 14238 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
14239 | { |
14240 | case Lisp_String: | |
14241 | { | |
14242 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 | 14243 | unsigned char c; |
50f80c2f | 14244 | const unsigned char *this, *lisp_string; |
5f5c8ee5 | 14245 | |
c53a1624 | 14246 | if (!NILP (props) || risky) |
0fcf414f RS |
14247 | { |
14248 | Lisp_Object oprops, aelt; | |
14249 | oprops = Ftext_properties_at (make_number (0), elt); | |
c53a1624 RS |
14250 | |
14251 | if (NILP (Fequal (props, oprops)) || risky) | |
0fcf414f | 14252 | { |
ae02e06a RS |
14253 | /* If the starting string has properties, |
14254 | merge the specified ones onto the existing ones. */ | |
c53a1624 | 14255 | if (! NILP (oprops) && !risky) |
ae02e06a RS |
14256 | { |
14257 | Lisp_Object tem; | |
14258 | ||
14259 | oprops = Fcopy_sequence (oprops); | |
14260 | tem = props; | |
14261 | while (CONSP (tem)) | |
14262 | { | |
14263 | oprops = Fplist_put (oprops, XCAR (tem), | |
14264 | XCAR (XCDR (tem))); | |
14265 | tem = XCDR (XCDR (tem)); | |
14266 | } | |
14267 | props = oprops; | |
14268 | } | |
14269 | ||
0fcf414f RS |
14270 | aelt = Fassoc (elt, mode_line_proptrans_alist); |
14271 | if (! NILP (aelt) && !NILP (Fequal (props, XCDR (aelt)))) | |
adb63af1 RS |
14272 | { |
14273 | mode_line_proptrans_alist | |
14274 | = Fcons (aelt, Fdelq (aelt, mode_line_proptrans_alist)); | |
14275 | elt = XCAR (aelt); | |
14276 | } | |
0fcf414f RS |
14277 | else |
14278 | { | |
adb63af1 RS |
14279 | Lisp_Object tem; |
14280 | ||
0fcf414f | 14281 | elt = Fcopy_sequence (elt); |
dc3b2c8b SM |
14282 | Fset_text_properties (make_number (0), Flength (elt), |
14283 | props, elt); | |
adb63af1 | 14284 | /* Add this item to mode_line_proptrans_alist. */ |
0fcf414f RS |
14285 | mode_line_proptrans_alist |
14286 | = Fcons (Fcons (elt, props), | |
14287 | mode_line_proptrans_alist); | |
adb63af1 RS |
14288 | /* Truncate mode_line_proptrans_alist |
14289 | to at most 50 elements. */ | |
14290 | tem = Fnthcdr (make_number (50), | |
14291 | mode_line_proptrans_alist); | |
14292 | if (! NILP (tem)) | |
14293 | XSETCDR (tem, Qnil); | |
0fcf414f RS |
14294 | } |
14295 | } | |
14296 | } | |
14297 | ||
2051c264 | 14298 | this = SDATA (elt); |
ae02e06a RS |
14299 | lisp_string = this; |
14300 | ||
0fcf414f RS |
14301 | if (literal) |
14302 | { | |
14303 | prec = precision - n; | |
14304 | if (frame_title_ptr) | |
2051c264 | 14305 | n += store_frame_title (SDATA (elt), -1, prec); |
fec8f23e KS |
14306 | else if (!NILP (mode_line_string_list)) |
14307 | n += store_mode_line_string (NULL, elt, 1, 0, prec, Qnil); | |
0fcf414f RS |
14308 | else |
14309 | n += display_string (NULL, elt, Qnil, 0, 0, it, | |
14310 | 0, prec, 0, STRING_MULTIBYTE (elt)); | |
14311 | ||
14312 | break; | |
14313 | } | |
14314 | ||
5f5c8ee5 GM |
14315 | while ((precision <= 0 || n < precision) |
14316 | && *this | |
14317 | && (frame_title_ptr | |
fec8f23e | 14318 | || !NILP (mode_line_string_list) |
5f5c8ee5 | 14319 | || it->current_x < it->last_visible_x)) |
a2889657 | 14320 | { |
50f80c2f | 14321 | const unsigned char *last = this; |
5f5c8ee5 GM |
14322 | |
14323 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
14324 | while ((c = *this++) != '\0' && c != '%') |
14325 | ; | |
2311178e | 14326 | |
a2889657 JB |
14327 | if (this - 1 != last) |
14328 | { | |
5f5c8ee5 GM |
14329 | /* Output to end of string or up to '%'. Field width |
14330 | is length of string. Don't output more than | |
14331 | PRECISION allows us. */ | |
d26b89b8 | 14332 | --this; |
eaaa65b0 GM |
14333 | |
14334 | prec = chars_in_text (last, this - last); | |
5f5c8ee5 GM |
14335 | if (precision > 0 && prec > precision - n) |
14336 | prec = precision - n; | |
2311178e | 14337 | |
d39b6696 | 14338 | if (frame_title_ptr) |
d26b89b8 | 14339 | n += store_frame_title (last, 0, prec); |
fec8f23e KS |
14340 | else if (!NILP (mode_line_string_list)) |
14341 | { | |
14342 | int bytepos = last - lisp_string; | |
14343 | int charpos = string_byte_to_char (elt, bytepos); | |
14344 | n += store_mode_line_string (NULL, | |
14345 | Fsubstring (elt, make_number (charpos), | |
14346 | make_number (charpos + prec)), | |
14347 | 0, 0, 0, Qnil); | |
14348 | } | |
d39b6696 | 14349 | else |
eaaa65b0 GM |
14350 | { |
14351 | int bytepos = last - lisp_string; | |
14352 | int charpos = string_byte_to_char (elt, bytepos); | |
14353 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
ca77144d GM |
14354 | it, 0, prec, 0, |
14355 | STRING_MULTIBYTE (elt)); | |
eaaa65b0 | 14356 | } |
a2889657 JB |
14357 | } |
14358 | else /* c == '%' */ | |
14359 | { | |
50f80c2f | 14360 | const unsigned char *percent_position = this; |
2311178e | 14361 | |
5f5c8ee5 GM |
14362 | /* Get the specified minimum width. Zero means |
14363 | don't pad. */ | |
14364 | field = 0; | |
a2889657 | 14365 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 14366 | field = field * 10 + c - '0'; |
a2889657 | 14367 | |
5f5c8ee5 GM |
14368 | /* Don't pad beyond the total padding allowed. */ |
14369 | if (field_width - n > 0 && field > field_width - n) | |
14370 | field = field_width - n; | |
a2889657 | 14371 | |
5f5c8ee5 GM |
14372 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
14373 | prec = precision - n; | |
2311178e | 14374 | |
a2889657 | 14375 | if (c == 'M') |
5f5c8ee5 | 14376 | n += display_mode_element (it, depth, field, prec, |
c53a1624 RS |
14377 | Vglobal_mode_string, props, |
14378 | risky); | |
a2889657 | 14379 | else if (c != 0) |
d39b6696 | 14380 | { |
72f62cb5 | 14381 | int multibyte; |
ae02e06a RS |
14382 | int bytepos, charpos; |
14383 | unsigned char *spec; | |
2311178e | 14384 | |
ae02e06a RS |
14385 | bytepos = percent_position - lisp_string; |
14386 | charpos = (STRING_MULTIBYTE (elt) | |
14387 | ? string_byte_to_char (elt, bytepos) | |
14388 | : bytepos); | |
14389 | ||
14390 | spec | |
72f62cb5 GM |
14391 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
14392 | ||
d39b6696 | 14393 | if (frame_title_ptr) |
5f5c8ee5 | 14394 | n += store_frame_title (spec, field, prec); |
fec8f23e KS |
14395 | else if (!NILP (mode_line_string_list)) |
14396 | { | |
14397 | int len = strlen (spec); | |
14398 | Lisp_Object tem = make_string (spec, len); | |
14399 | props = Ftext_properties_at (make_number (charpos), elt); | |
14400 | /* Should only keep face property in props */ | |
14401 | n += store_mode_line_string (NULL, tem, 0, field, prec, props); | |
14402 | } | |
d39b6696 | 14403 | else |
5f5c8ee5 | 14404 | { |
ae02e06a | 14405 | int nglyphs_before, nwritten; |
2311178e | 14406 | |
72f62cb5 | 14407 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; |
72f62cb5 GM |
14408 | nwritten = display_string (spec, Qnil, elt, |
14409 | charpos, 0, it, | |
14410 | field, prec, 0, | |
14411 | multibyte); | |
5f5c8ee5 GM |
14412 | |
14413 | /* Assign to the glyphs written above the | |
14414 | string where the `%x' came from, position | |
14415 | of the `%'. */ | |
14416 | if (nwritten > 0) | |
14417 | { | |
14418 | struct glyph *glyph | |
14419 | = (it->glyph_row->glyphs[TEXT_AREA] | |
14420 | + nglyphs_before); | |
14421 | int i; | |
14422 | ||
14423 | for (i = 0; i < nwritten; ++i) | |
14424 | { | |
14425 | glyph[i].object = elt; | |
14426 | glyph[i].charpos = charpos; | |
14427 | } | |
2311178e | 14428 | |
5f5c8ee5 GM |
14429 | n += nwritten; |
14430 | } | |
14431 | } | |
d39b6696 | 14432 | } |
b8523839 AS |
14433 | else /* c == 0 */ |
14434 | break; | |
a2889657 JB |
14435 | } |
14436 | } | |
14437 | } | |
14438 | break; | |
14439 | ||
14440 | case Lisp_Symbol: | |
14441 | /* A symbol: process the value of the symbol recursively | |
14442 | as if it appeared here directly. Avoid error if symbol void. | |
14443 | Special case: if value of symbol is a string, output the string | |
14444 | literally. */ | |
14445 | { | |
14446 | register Lisp_Object tem; | |
c53a1624 RS |
14447 | |
14448 | /* If the variable is not marked as risky to set | |
14449 | then its contents are risky to use. */ | |
14450 | if (NILP (Fget (elt, Qrisky_local_variable))) | |
14451 | risky = 1; | |
14452 | ||
a2889657 | 14453 | tem = Fboundp (elt); |
265a9e55 | 14454 | if (!NILP (tem)) |
a2889657 JB |
14455 | { |
14456 | tem = Fsymbol_value (elt); | |
14457 | /* If value is a string, output that string literally: | |
14458 | don't check for % within it. */ | |
e24c997d | 14459 | if (STRINGP (tem)) |
0fcf414f RS |
14460 | literal = 1; |
14461 | ||
14462 | if (!EQ (tem, elt)) | |
5f5c8ee5 GM |
14463 | { |
14464 | /* Give up right away for nil or t. */ | |
14465 | elt = tem; | |
14466 | goto tail_recurse; | |
14467 | } | |
a2889657 JB |
14468 | } |
14469 | } | |
14470 | break; | |
14471 | ||
14472 | case Lisp_Cons: | |
14473 | { | |
14474 | register Lisp_Object car, tem; | |
14475 | ||
0fcf414f RS |
14476 | /* A cons cell: five distinct cases. |
14477 | If first element is :eval or :propertize, do something special. | |
a2889657 JB |
14478 | If first element is a string or a cons, process all the elements |
14479 | and effectively concatenate them. | |
14480 | If first element is a negative number, truncate displaying cdr to | |
14481 | at most that many characters. If positive, pad (with spaces) | |
14482 | to at least that many characters. | |
14483 | If first element is a symbol, process the cadr or caddr recursively | |
14484 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 14485 | car = XCAR (elt); |
0fcf414f | 14486 | if (EQ (car, QCeval)) |
5f5c8ee5 GM |
14487 | { |
14488 | /* An element of the form (:eval FORM) means evaluate FORM | |
14489 | and use the result as mode line elements. */ | |
0fcf414f | 14490 | |
c53a1624 RS |
14491 | if (risky) |
14492 | break; | |
14493 | ||
0fcf414f RS |
14494 | if (CONSP (XCDR (elt))) |
14495 | { | |
14496 | Lisp_Object spec; | |
14497 | spec = safe_eval (XCAR (XCDR (elt))); | |
14498 | n += display_mode_element (it, depth, field_width - n, | |
c53a1624 RS |
14499 | precision - n, spec, props, |
14500 | risky); | |
0fcf414f RS |
14501 | } |
14502 | } | |
14503 | else if (EQ (car, QCpropertize)) | |
14504 | { | |
c53a1624 RS |
14505 | /* An element of the form (:propertize ELT PROPS...) |
14506 | means display ELT but applying properties PROPS. */ | |
14507 | ||
14508 | if (risky) | |
14509 | break; | |
14510 | ||
0fcf414f | 14511 | if (CONSP (XCDR (elt))) |
c53a1624 RS |
14512 | n += display_mode_element (it, depth, field_width - n, |
14513 | precision - n, XCAR (XCDR (elt)), | |
14514 | XCDR (XCDR (elt)), risky); | |
5f5c8ee5 GM |
14515 | } |
14516 | else if (SYMBOLP (car)) | |
a2889657 JB |
14517 | { |
14518 | tem = Fboundp (car); | |
9472f927 | 14519 | elt = XCDR (elt); |
e24c997d | 14520 | if (!CONSP (elt)) |
a2889657 JB |
14521 | goto invalid; |
14522 | /* elt is now the cdr, and we know it is a cons cell. | |
14523 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 14524 | if (!NILP (tem)) |
a2889657 JB |
14525 | { |
14526 | tem = Fsymbol_value (car); | |
265a9e55 | 14527 | if (!NILP (tem)) |
9472f927 GM |
14528 | { |
14529 | elt = XCAR (elt); | |
14530 | goto tail_recurse; | |
14531 | } | |
a2889657 JB |
14532 | } |
14533 | /* Symbol's value is nil (or symbol is unbound) | |
14534 | Get the cddr of the original list | |
14535 | and if possible find the caddr and use that. */ | |
9472f927 | 14536 | elt = XCDR (elt); |
265a9e55 | 14537 | if (NILP (elt)) |
a2889657 | 14538 | break; |
e24c997d | 14539 | else if (!CONSP (elt)) |
a2889657 | 14540 | goto invalid; |
9472f927 | 14541 | elt = XCAR (elt); |
a2889657 JB |
14542 | goto tail_recurse; |
14543 | } | |
e24c997d | 14544 | else if (INTEGERP (car)) |
a2889657 JB |
14545 | { |
14546 | register int lim = XINT (car); | |
9472f927 | 14547 | elt = XCDR (elt); |
a2889657 | 14548 | if (lim < 0) |
5f5c8ee5 GM |
14549 | { |
14550 | /* Negative int means reduce maximum width. */ | |
14551 | if (precision <= 0) | |
14552 | precision = -lim; | |
14553 | else | |
14554 | precision = min (precision, -lim); | |
14555 | } | |
a2889657 JB |
14556 | else if (lim > 0) |
14557 | { | |
14558 | /* Padding specified. Don't let it be more than | |
14559 | current maximum. */ | |
5f5c8ee5 GM |
14560 | if (precision > 0) |
14561 | lim = min (precision, lim); | |
14562 | ||
a2889657 JB |
14563 | /* If that's more padding than already wanted, queue it. |
14564 | But don't reduce padding already specified even if | |
14565 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 14566 | field_width = max (lim, field_width); |
a2889657 JB |
14567 | } |
14568 | goto tail_recurse; | |
14569 | } | |
e24c997d | 14570 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
14571 | { |
14572 | register int limit = 50; | |
5f5c8ee5 GM |
14573 | /* Limit is to protect against circular lists. */ |
14574 | while (CONSP (elt) | |
14575 | && --limit > 0 | |
14576 | && (precision <= 0 || n < precision)) | |
a2889657 | 14577 | { |
5f5c8ee5 | 14578 | n += display_mode_element (it, depth, field_width - n, |
c53a1624 RS |
14579 | precision - n, XCAR (elt), |
14580 | props, risky); | |
9472f927 | 14581 | elt = XCDR (elt); |
a2889657 JB |
14582 | } |
14583 | } | |
14584 | } | |
14585 | break; | |
14586 | ||
14587 | default: | |
14588 | invalid: | |
d39b6696 | 14589 | if (frame_title_ptr) |
5f5c8ee5 | 14590 | n += store_frame_title ("*invalid*", 0, precision - n); |
fec8f23e KS |
14591 | else if (!NILP (mode_line_string_list)) |
14592 | n += store_mode_line_string ("*invalid*", Qnil, 0, 0, precision - n, Qnil); | |
d39b6696 | 14593 | else |
5f5c8ee5 GM |
14594 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
14595 | precision - n, 0, 0); | |
14596 | return n; | |
a2889657 JB |
14597 | } |
14598 | ||
5f5c8ee5 GM |
14599 | /* Pad to FIELD_WIDTH. */ |
14600 | if (field_width > 0 && n < field_width) | |
14601 | { | |
14602 | if (frame_title_ptr) | |
14603 | n += store_frame_title ("", field_width - n, 0); | |
fec8f23e KS |
14604 | else if (!NILP (mode_line_string_list)) |
14605 | n += store_mode_line_string ("", Qnil, 0, field_width - n, 0, Qnil); | |
5f5c8ee5 GM |
14606 | else |
14607 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
14608 | 0, 0, 0); | |
14609 | } | |
2311178e | 14610 | |
5f5c8ee5 | 14611 | return n; |
a2889657 | 14612 | } |
5f5c8ee5 | 14613 | |
fec8f23e KS |
14614 | /* Store a mode-line string element in mode_line_string_list. |
14615 | ||
14616 | If STRING is non-null, display that C string. Otherwise, the Lisp | |
14617 | string LISP_STRING is displayed. | |
14618 | ||
14619 | FIELD_WIDTH is the minimum number of output glyphs to produce. | |
14620 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
14621 | with spaces. FIELD_WIDTH <= 0 means don't pad. | |
14622 | ||
14623 | PRECISION is the maximum number of characters to output from | |
14624 | STRING. PRECISION <= 0 means don't truncate the string. | |
14625 | ||
14626 | If COPY_STRING is non-zero, make a copy of LISP_STRING before adding | |
14627 | properties to the string. | |
14628 | ||
7d0393cf | 14629 | PROPS are the properties to add to the string. |
fec8f23e KS |
14630 | The mode_line_string_face face property is always added to the string. |
14631 | */ | |
14632 | ||
14633 | static int store_mode_line_string (string, lisp_string, copy_string, field_width, precision, props) | |
14634 | char *string; | |
14635 | Lisp_Object lisp_string; | |
14636 | int copy_string; | |
14637 | int field_width; | |
14638 | int precision; | |
14639 | Lisp_Object props; | |
14640 | { | |
14641 | int len; | |
14642 | int n = 0; | |
14643 | ||
14644 | if (string != NULL) | |
14645 | { | |
14646 | len = strlen (string); | |
14647 | if (precision > 0 && len > precision) | |
14648 | len = precision; | |
14649 | lisp_string = make_string (string, len); | |
14650 | if (NILP (props)) | |
14651 | props = mode_line_string_face_prop; | |
14652 | else if (!NILP (mode_line_string_face)) | |
14653 | { | |
14654 | Lisp_Object face = Fplist_get (props, Qface); | |
14655 | props = Fcopy_sequence (props); | |
14656 | if (NILP (face)) | |
14657 | face = mode_line_string_face; | |
14658 | else | |
14659 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
14660 | props = Fplist_put (props, Qface, face); | |
14661 | } | |
14662 | Fadd_text_properties (make_number (0), make_number (len), | |
14663 | props, lisp_string); | |
14664 | } | |
7d0393cf | 14665 | else |
fec8f23e | 14666 | { |
c8224325 | 14667 | len = XFASTINT (Flength (lisp_string)); |
fec8f23e KS |
14668 | if (precision > 0 && len > precision) |
14669 | { | |
14670 | len = precision; | |
14671 | lisp_string = Fsubstring (lisp_string, make_number (0), make_number (len)); | |
14672 | precision = -1; | |
14673 | } | |
14674 | if (!NILP (mode_line_string_face)) | |
14675 | { | |
14676 | Lisp_Object face; | |
14677 | if (NILP (props)) | |
14678 | props = Ftext_properties_at (make_number (0), lisp_string); | |
14679 | face = Fplist_get (props, Qface); | |
14680 | if (NILP (face)) | |
14681 | face = mode_line_string_face; | |
14682 | else | |
14683 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
14684 | props = Fcons (Qface, Fcons (face, Qnil)); | |
14685 | if (copy_string) | |
14686 | lisp_string = Fcopy_sequence (lisp_string); | |
14687 | } | |
14688 | if (!NILP (props)) | |
14689 | Fadd_text_properties (make_number (0), make_number (len), | |
14690 | props, lisp_string); | |
14691 | } | |
14692 | ||
14693 | if (len > 0) | |
14694 | { | |
14695 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 14696 | n += len; |
fec8f23e KS |
14697 | } |
14698 | ||
14699 | if (field_width > len) | |
14700 | { | |
14701 | field_width -= len; | |
14702 | lisp_string = Fmake_string (make_number (field_width), make_number (' ')); | |
14703 | if (!NILP (props)) | |
14704 | Fadd_text_properties (make_number (0), make_number (field_width), | |
14705 | props, lisp_string); | |
14706 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 14707 | n += field_width; |
fec8f23e KS |
14708 | } |
14709 | ||
14710 | return n; | |
14711 | } | |
14712 | ||
5f5c8ee5 | 14713 | |
8143e6ab | 14714 | DEFUN ("format-mode-line", Fformat_mode_line, Sformat_mode_line, |
fec8f23e | 14715 | 0, 3, 0, |
8143e6ab KS |
14716 | doc: /* Return the mode-line of selected window as a string. |
14717 | First optional arg FORMAT specifies a different format string (see | |
8b22c65a | 14718 | `mode-line-format' for details) to use. If FORMAT is t, return |
8143e6ab | 14719 | the buffer's header-line. Second optional arg WINDOW specifies a |
fec8f23e KS |
14720 | different window to use as the context for the formatting. |
14721 | If third optional arg NO-PROPS is non-nil, string is not propertized. */) | |
14722 | (format, window, no_props) | |
14723 | Lisp_Object format, window, no_props; | |
8143e6ab KS |
14724 | { |
14725 | struct it it; | |
8143e6ab KS |
14726 | int len; |
14727 | struct window *w; | |
14728 | struct buffer *old_buffer = NULL; | |
fec8f23e | 14729 | enum face_id face_id = DEFAULT_FACE_ID; |
8143e6ab KS |
14730 | |
14731 | if (NILP (window)) | |
14732 | window = selected_window; | |
14733 | CHECK_WINDOW (window); | |
14734 | w = XWINDOW (window); | |
14735 | CHECK_BUFFER (w->buffer); | |
14736 | ||
14737 | if (XBUFFER (w->buffer) != current_buffer) | |
14738 | { | |
14739 | old_buffer = current_buffer; | |
14740 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
14741 | } | |
14742 | ||
14743 | if (NILP (format) || EQ (format, Qt)) | |
fec8f23e KS |
14744 | { |
14745 | face_id = NILP (format) | |
14746 | ? CURRENT_MODE_LINE_FACE_ID (w) : | |
14747 | HEADER_LINE_FACE_ID; | |
14748 | format = NILP (format) | |
14749 | ? current_buffer->mode_line_format | |
14750 | : current_buffer->header_line_format; | |
14751 | } | |
14752 | ||
14753 | init_iterator (&it, w, -1, -1, NULL, face_id); | |
8143e6ab | 14754 | |
fec8f23e KS |
14755 | if (NILP (no_props)) |
14756 | { | |
14757 | mode_line_string_face = | |
14758 | (face_id == MODE_LINE_FACE_ID ? Qmode_line : | |
14759 | face_id == MODE_LINE_INACTIVE_FACE_ID ? Qmode_line_inactive : | |
14760 | face_id == HEADER_LINE_FACE_ID ? Qheader_line : Qnil); | |
8143e6ab | 14761 | |
fec8f23e KS |
14762 | mode_line_string_face_prop = |
14763 | NILP (mode_line_string_face) ? Qnil : | |
14764 | Fcons (Qface, Fcons (mode_line_string_face, Qnil)); | |
14765 | ||
14766 | /* We need a dummy last element in mode_line_string_list to | |
14767 | indicate we are building the propertized mode-line string. | |
14768 | Using mode_line_string_face_prop here GC protects it. */ | |
7d0393cf | 14769 | mode_line_string_list = |
fec8f23e KS |
14770 | Fcons (mode_line_string_face_prop, Qnil); |
14771 | frame_title_ptr = NULL; | |
14772 | } | |
14773 | else | |
14774 | { | |
14775 | mode_line_string_face_prop = Qnil; | |
14776 | mode_line_string_list = Qnil; | |
14777 | frame_title_ptr = frame_title_buf; | |
14778 | } | |
8143e6ab KS |
14779 | |
14780 | push_frame_kboard (it.f); | |
14781 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); | |
14782 | pop_frame_kboard (); | |
14783 | ||
14784 | if (old_buffer) | |
14785 | set_buffer_internal_1 (old_buffer); | |
14786 | ||
fec8f23e KS |
14787 | if (NILP (no_props)) |
14788 | { | |
14789 | Lisp_Object str; | |
14790 | mode_line_string_list = Fnreverse (mode_line_string_list); | |
14791 | str = Fmapconcat (intern ("identity"), XCDR (mode_line_string_list), | |
14792 | make_string ("", 0)); | |
14793 | mode_line_string_face_prop = Qnil; | |
14794 | mode_line_string_list = Qnil; | |
14795 | return str; | |
14796 | } | |
14797 | ||
8143e6ab KS |
14798 | len = frame_title_ptr - frame_title_buf; |
14799 | if (len > 0 && frame_title_ptr[-1] == '-') | |
14800 | { | |
14801 | /* Mode lines typically ends with numerous dashes; reduce to two dashes. */ | |
14802 | while (frame_title_ptr > frame_title_buf && *--frame_title_ptr == '-') | |
14803 | ; | |
14804 | frame_title_ptr += 3; /* restore last non-dash + two dashes */ | |
14805 | if (len > frame_title_ptr - frame_title_buf) | |
14806 | len = frame_title_ptr - frame_title_buf; | |
14807 | } | |
14808 | ||
14809 | frame_title_ptr = NULL; | |
14810 | return make_string (frame_title_buf, len); | |
14811 | } | |
14812 | ||
766525bc RS |
14813 | /* Write a null-terminated, right justified decimal representation of |
14814 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
14815 | ||
14816 | static void | |
14817 | pint2str (buf, width, d) | |
14818 | register char *buf; | |
14819 | register int width; | |
14820 | register int d; | |
14821 | { | |
14822 | register char *p = buf; | |
2311178e | 14823 | |
766525bc | 14824 | if (d <= 0) |
5f5c8ee5 | 14825 | *p++ = '0'; |
766525bc | 14826 | else |
5f5c8ee5 | 14827 | { |
766525bc | 14828 | while (d > 0) |
5f5c8ee5 | 14829 | { |
766525bc RS |
14830 | *p++ = d % 10 + '0'; |
14831 | d /= 10; | |
5f5c8ee5 GM |
14832 | } |
14833 | } | |
2311178e | 14834 | |
5f5c8ee5 GM |
14835 | for (width -= (int) (p - buf); width > 0; --width) |
14836 | *p++ = ' '; | |
766525bc RS |
14837 | *p-- = '\0'; |
14838 | while (p > buf) | |
5f5c8ee5 | 14839 | { |
766525bc RS |
14840 | d = *buf; |
14841 | *buf++ = *p; | |
14842 | *p-- = d; | |
5f5c8ee5 | 14843 | } |
766525bc RS |
14844 | } |
14845 | ||
5f5c8ee5 | 14846 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
14847 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
14848 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
14849 | ||
6693a99a | 14850 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 14851 | |
1c9241f5 KH |
14852 | static char * |
14853 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
14854 | Lisp_Object coding_system; | |
14855 | register char *buf; | |
14856 | int eol_flag; | |
14857 | { | |
1e1078d6 | 14858 | Lisp_Object val; |
916848d8 | 14859 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
50f80c2f | 14860 | const unsigned char *eol_str; |
302f2b38 EZ |
14861 | int eol_str_len; |
14862 | /* The EOL conversion we are using. */ | |
14863 | Lisp_Object eoltype; | |
1e1078d6 | 14864 | |
4a09dee0 | 14865 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 14866 | eoltype = Qnil; |
1c9241f5 | 14867 | |
4a09dee0 | 14868 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 14869 | { |
916848d8 RS |
14870 | if (multibyte) |
14871 | *buf++ = '-'; | |
21e989e3 | 14872 | if (eol_flag) |
302f2b38 | 14873 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 14874 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
14875 | } |
14876 | else | |
14877 | { | |
1e1078d6 RS |
14878 | Lisp_Object eolvalue; |
14879 | ||
14880 | eolvalue = Fget (coding_system, Qeol_type); | |
14881 | ||
916848d8 | 14882 | if (multibyte) |
a61b7058 | 14883 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 14884 | |
1c9241f5 KH |
14885 | if (eol_flag) |
14886 | { | |
1e1078d6 RS |
14887 | /* The EOL conversion that is normal on this system. */ |
14888 | ||
14889 | if (NILP (eolvalue)) /* Not yet decided. */ | |
14890 | eoltype = eol_mnemonic_undecided; | |
14891 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
14892 | eoltype = eol_mnemonic_undecided; | |
14893 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
14894 | eoltype = (XFASTINT (eolvalue) == 0 | |
14895 | ? eol_mnemonic_unix | |
14896 | : (XFASTINT (eolvalue) == 1 | |
14897 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
14898 | } |
14899 | } | |
2311178e | 14900 | |
302f2b38 EZ |
14901 | if (eol_flag) |
14902 | { | |
14903 | /* Mention the EOL conversion if it is not the usual one. */ | |
14904 | if (STRINGP (eoltype)) | |
14905 | { | |
2051c264 GM |
14906 | eol_str = SDATA (eoltype); |
14907 | eol_str_len = SBYTES (eoltype); | |
302f2b38 | 14908 | } |
f30b3499 KH |
14909 | else if (INTEGERP (eoltype) |
14910 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
14911 | { | |
50f80c2f KR |
14912 | unsigned char *tmp = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
14913 | eol_str_len = CHAR_STRING (XINT (eoltype), tmp); | |
14914 | eol_str = tmp; | |
f30b3499 | 14915 | } |
302f2b38 EZ |
14916 | else |
14917 | { | |
14918 | eol_str = invalid_eol_type; | |
14919 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 14920 | } |
f30b3499 | 14921 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 14922 | buf += eol_str_len; |
1c9241f5 | 14923 | } |
302f2b38 | 14924 | |
1c9241f5 KH |
14925 | return buf; |
14926 | } | |
14927 | ||
a2889657 | 14928 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
14929 | generated by character C. PRECISION >= 0 means don't return a |
14930 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 GM |
14931 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
14932 | if the result is multibyte text. */ | |
a2889657 | 14933 | |
11e82b76 JB |
14934 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
14935 | ||
a2889657 | 14936 | static char * |
72f62cb5 | 14937 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 14938 | struct window *w; |
68c45bf0 | 14939 | register int c; |
5f5c8ee5 | 14940 | int field_width, precision; |
72f62cb5 | 14941 | int *multibyte; |
a2889657 | 14942 | { |
0b67772d | 14943 | Lisp_Object obj; |
5f5c8ee5 GM |
14944 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
14945 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 14946 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 14947 | |
0b67772d | 14948 | obj = Qnil; |
72f62cb5 | 14949 | *multibyte = 0; |
a2889657 JB |
14950 | |
14951 | switch (c) | |
14952 | { | |
1af9f229 RS |
14953 | case '*': |
14954 | if (!NILP (b->read_only)) | |
14955 | return "%"; | |
14956 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14957 | return "*"; | |
14958 | return "-"; | |
14959 | ||
14960 | case '+': | |
14961 | /* This differs from %* only for a modified read-only buffer. */ | |
14962 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14963 | return "*"; | |
14964 | if (!NILP (b->read_only)) | |
14965 | return "%"; | |
14966 | return "-"; | |
14967 | ||
14968 | case '&': | |
14969 | /* This differs from %* in ignoring read-only-ness. */ | |
14970 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14971 | return "*"; | |
14972 | return "-"; | |
14973 | ||
14974 | case '%': | |
14975 | return "%"; | |
14976 | ||
2311178e | 14977 | case '[': |
1af9f229 RS |
14978 | { |
14979 | int i; | |
14980 | char *p; | |
14981 | ||
14982 | if (command_loop_level > 5) | |
14983 | return "[[[... "; | |
14984 | p = decode_mode_spec_buf; | |
14985 | for (i = 0; i < command_loop_level; i++) | |
14986 | *p++ = '['; | |
14987 | *p = 0; | |
14988 | return decode_mode_spec_buf; | |
14989 | } | |
14990 | ||
2311178e | 14991 | case ']': |
1af9f229 RS |
14992 | { |
14993 | int i; | |
14994 | char *p; | |
14995 | ||
14996 | if (command_loop_level > 5) | |
14997 | return " ...]]]"; | |
14998 | p = decode_mode_spec_buf; | |
14999 | for (i = 0; i < command_loop_level; i++) | |
15000 | *p++ = ']'; | |
15001 | *p = 0; | |
15002 | return decode_mode_spec_buf; | |
15003 | } | |
15004 | ||
15005 | case '-': | |
15006 | { | |
1af9f229 | 15007 | register int i; |
5f5c8ee5 GM |
15008 | |
15009 | /* Let lots_of_dashes be a string of infinite length. */ | |
fec8f23e KS |
15010 | if (!NILP (mode_line_string_list)) |
15011 | return "--"; | |
5f5c8ee5 GM |
15012 | if (field_width <= 0 |
15013 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 15014 | { |
5f5c8ee5 GM |
15015 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
15016 | decode_mode_spec_buf[i] = '-'; | |
15017 | decode_mode_spec_buf[i] = '\0'; | |
15018 | return decode_mode_spec_buf; | |
1af9f229 | 15019 | } |
5f5c8ee5 GM |
15020 | else |
15021 | return lots_of_dashes; | |
1af9f229 RS |
15022 | } |
15023 | ||
2311178e | 15024 | case 'b': |
d39b6696 | 15025 | obj = b->name; |
a2889657 JB |
15026 | break; |
15027 | ||
1af9f229 RS |
15028 | case 'c': |
15029 | { | |
2311178e | 15030 | int col = (int) current_column (); /* iftc */ |
ac90c44f | 15031 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 15032 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
15033 | return decode_mode_spec_buf; |
15034 | } | |
15035 | ||
15036 | case 'F': | |
15037 | /* %F displays the frame name. */ | |
5f5c8ee5 | 15038 | if (!NILP (f->title)) |
2051c264 | 15039 | return (char *) SDATA (f->title); |
fd8ff63d | 15040 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
2051c264 | 15041 | return (char *) SDATA (f->name); |
9c6da96f | 15042 | return "Emacs"; |
1af9f229 | 15043 | |
2311178e | 15044 | case 'f': |
d39b6696 | 15045 | obj = b->filename; |
a2889657 JB |
15046 | break; |
15047 | ||
aa6d10fa RS |
15048 | case 'l': |
15049 | { | |
12adba34 RS |
15050 | int startpos = XMARKER (w->start)->charpos; |
15051 | int startpos_byte = marker_byte_position (w->start); | |
15052 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 15053 | int nlines, junk; |
aa6d10fa RS |
15054 | int height = XFASTINT (w->height); |
15055 | ||
2311178e | 15056 | /* If we decided that this buffer isn't suitable for line numbers, |
aa6d10fa RS |
15057 | don't forget that too fast. */ |
15058 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 15059 | goto no_value; |
5300fd39 RS |
15060 | /* But do forget it, if the window shows a different buffer now. */ |
15061 | else if (BUFFERP (w->base_line_pos)) | |
15062 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
15063 | |
15064 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 15065 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 15066 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
15067 | { |
15068 | w->base_line_pos = Qnil; | |
15069 | w->base_line_number = Qnil; | |
766525bc | 15070 | goto no_value; |
aa6d10fa RS |
15071 | } |
15072 | ||
15073 | if (!NILP (w->base_line_number) | |
15074 | && !NILP (w->base_line_pos) | |
12adba34 | 15075 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
15076 | { |
15077 | line = XFASTINT (w->base_line_number); | |
15078 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 15079 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
15080 | } |
15081 | else | |
15082 | { | |
15083 | line = 1; | |
d39b6696 | 15084 | linepos = BUF_BEGV (b); |
12adba34 | 15085 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
15086 | } |
15087 | ||
15088 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
15089 | nlines = display_count_lines (linepos, linepos_byte, |
15090 | startpos_byte, | |
15091 | startpos, &junk); | |
aa6d10fa RS |
15092 | |
15093 | topline = nlines + line; | |
15094 | ||
15095 | /* Determine a new base line, if the old one is too close | |
15096 | or too far away, or if we did not have one. | |
15097 | "Too close" means it's plausible a scroll-down would | |
15098 | go back past it. */ | |
d39b6696 | 15099 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 15100 | { |
ac90c44f GM |
15101 | w->base_line_number = make_number (topline); |
15102 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
15103 | } |
15104 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 15105 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 15106 | { |
d39b6696 | 15107 | int limit = BUF_BEGV (b); |
12adba34 | 15108 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 15109 | int position; |
5d121aec | 15110 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
15111 | |
15112 | if (startpos - distance > limit) | |
12adba34 RS |
15113 | { |
15114 | limit = startpos - distance; | |
15115 | limit_byte = CHAR_TO_BYTE (limit); | |
15116 | } | |
aa6d10fa | 15117 | |
12adba34 RS |
15118 | nlines = display_count_lines (startpos, startpos_byte, |
15119 | limit_byte, | |
15120 | - (height * 2 + 30), | |
aa6d10fa | 15121 | &position); |
2311178e | 15122 | /* If we couldn't find the lines we wanted within |
5d121aec | 15123 | line_number_display_limit_width chars per line, |
aa6d10fa | 15124 | give up on line numbers for this window. */ |
12adba34 | 15125 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
15126 | { |
15127 | w->base_line_pos = w->buffer; | |
15128 | w->base_line_number = Qnil; | |
766525bc | 15129 | goto no_value; |
aa6d10fa RS |
15130 | } |
15131 | ||
ac90c44f GM |
15132 | w->base_line_number = make_number (topline - nlines); |
15133 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
15134 | } |
15135 | ||
15136 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
15137 | nlines = display_count_lines (startpos, startpos_byte, |
15138 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
15139 | |
15140 | /* Record that we did display the line number. */ | |
15141 | line_number_displayed = 1; | |
15142 | ||
15143 | /* Make the string to show. */ | |
5f5c8ee5 | 15144 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 15145 | return decode_mode_spec_buf; |
766525bc RS |
15146 | no_value: |
15147 | { | |
15148 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
15149 | int pad = field_width - 2; |
15150 | while (pad-- > 0) | |
15151 | *p++ = ' '; | |
15152 | *p++ = '?'; | |
b357b9d4 KR |
15153 | *p++ = '?'; |
15154 | *p = '\0'; | |
766525bc RS |
15155 | return decode_mode_spec_buf; |
15156 | } | |
aa6d10fa RS |
15157 | } |
15158 | break; | |
15159 | ||
2311178e | 15160 | case 'm': |
d39b6696 | 15161 | obj = b->mode_name; |
a2889657 JB |
15162 | break; |
15163 | ||
15164 | case 'n': | |
d39b6696 | 15165 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
15166 | return " Narrow"; |
15167 | break; | |
15168 | ||
a2889657 JB |
15169 | case 'p': |
15170 | { | |
15171 | int pos = marker_position (w->start); | |
d39b6696 | 15172 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 15173 | |
d39b6696 | 15174 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 15175 | { |
d39b6696 | 15176 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
15177 | return "All"; |
15178 | else | |
15179 | return "Bottom"; | |
15180 | } | |
d39b6696 | 15181 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
15182 | return "Top"; |
15183 | else | |
15184 | { | |
3c7d31b9 RS |
15185 | if (total > 1000000) |
15186 | /* Do it differently for a large value, to avoid overflow. */ | |
15187 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
15188 | else | |
15189 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
15190 | /* We can't normally display a 3-digit number, |
15191 | so get us a 2-digit number that is close. */ | |
15192 | if (total == 100) | |
15193 | total = 99; | |
15194 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
15195 | return decode_mode_spec_buf; | |
15196 | } | |
15197 | } | |
15198 | ||
8ffcb79f RS |
15199 | /* Display percentage of size above the bottom of the screen. */ |
15200 | case 'P': | |
15201 | { | |
15202 | int toppos = marker_position (w->start); | |
d39b6696 KH |
15203 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
15204 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 15205 | |
d39b6696 | 15206 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 15207 | { |
d39b6696 | 15208 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
15209 | return "All"; |
15210 | else | |
15211 | return "Bottom"; | |
15212 | } | |
15213 | else | |
15214 | { | |
3c7d31b9 RS |
15215 | if (total > 1000000) |
15216 | /* Do it differently for a large value, to avoid overflow. */ | |
15217 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
15218 | else | |
15219 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
15220 | /* We can't normally display a 3-digit number, |
15221 | so get us a 2-digit number that is close. */ | |
15222 | if (total == 100) | |
15223 | total = 99; | |
d39b6696 | 15224 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
15225 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
15226 | else | |
15227 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
15228 | return decode_mode_spec_buf; | |
15229 | } | |
15230 | } | |
15231 | ||
1af9f229 RS |
15232 | case 's': |
15233 | /* status of process */ | |
15234 | obj = Fget_buffer_process (w->buffer); | |
15235 | if (NILP (obj)) | |
15236 | return "no process"; | |
15237 | #ifdef subprocesses | |
15238 | obj = Fsymbol_name (Fprocess_status (obj)); | |
15239 | #endif | |
15240 | break; | |
d39b6696 | 15241 | |
1af9f229 RS |
15242 | case 't': /* indicate TEXT or BINARY */ |
15243 | #ifdef MODE_LINE_BINARY_TEXT | |
15244 | return MODE_LINE_BINARY_TEXT (b); | |
15245 | #else | |
15246 | return "T"; | |
15247 | #endif | |
1c9241f5 KH |
15248 | |
15249 | case 'z': | |
15250 | /* coding-system (not including end-of-line format) */ | |
15251 | case 'Z': | |
15252 | /* coding-system (including end-of-line type) */ | |
15253 | { | |
15254 | int eol_flag = (c == 'Z'); | |
539b4d41 | 15255 | char *p = decode_mode_spec_buf; |
1c9241f5 | 15256 | |
d30e754b | 15257 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 15258 | { |
11c52c4f RS |
15259 | /* No need to mention EOL here--the terminal never needs |
15260 | to do EOL conversion. */ | |
15261 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
15262 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 15263 | } |
f13c925f | 15264 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 15265 | p, eol_flag); |
f13c925f | 15266 | |
11c52c4f | 15267 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
15268 | #ifdef subprocesses |
15269 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
15270 | if (PROCESSP (obj)) | |
15271 | { | |
15272 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
15273 | p, eol_flag); | |
15274 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
15275 | p, eol_flag); | |
15276 | } | |
15277 | #endif /* subprocesses */ | |
11c52c4f | 15278 | #endif /* 0 */ |
1c9241f5 KH |
15279 | *p = 0; |
15280 | return decode_mode_spec_buf; | |
15281 | } | |
a2889657 | 15282 | } |
d39b6696 | 15283 | |
e24c997d | 15284 | if (STRINGP (obj)) |
72f62cb5 GM |
15285 | { |
15286 | *multibyte = STRING_MULTIBYTE (obj); | |
2051c264 | 15287 | return (char *) SDATA (obj); |
72f62cb5 | 15288 | } |
a2889657 JB |
15289 | else |
15290 | return ""; | |
15291 | } | |
5f5c8ee5 GM |
15292 | |
15293 | ||
12adba34 RS |
15294 | /* Count up to COUNT lines starting from START / START_BYTE. |
15295 | But don't go beyond LIMIT_BYTE. | |
15296 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 15297 | |
12adba34 | 15298 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
15299 | |
15300 | static int | |
12adba34 RS |
15301 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
15302 | int start, start_byte, limit_byte, count; | |
15303 | int *byte_pos_ptr; | |
59b49f63 | 15304 | { |
59b49f63 RS |
15305 | register unsigned char *cursor; |
15306 | unsigned char *base; | |
15307 | ||
15308 | register int ceiling; | |
15309 | register unsigned char *ceiling_addr; | |
12adba34 | 15310 | int orig_count = count; |
59b49f63 RS |
15311 | |
15312 | /* If we are not in selective display mode, | |
15313 | check only for newlines. */ | |
12adba34 RS |
15314 | int selective_display = (!NILP (current_buffer->selective_display) |
15315 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
15316 | |
15317 | if (count > 0) | |
12adba34 RS |
15318 | { |
15319 | while (start_byte < limit_byte) | |
15320 | { | |
15321 | ceiling = BUFFER_CEILING_OF (start_byte); | |
15322 | ceiling = min (limit_byte - 1, ceiling); | |
15323 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
15324 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
15325 | while (1) | |
15326 | { | |
15327 | if (selective_display) | |
15328 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
15329 | ; | |
15330 | else | |
15331 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
15332 | ; | |
15333 | ||
15334 | if (cursor != ceiling_addr) | |
15335 | { | |
15336 | if (--count == 0) | |
15337 | { | |
15338 | start_byte += cursor - base + 1; | |
15339 | *byte_pos_ptr = start_byte; | |
15340 | return orig_count; | |
15341 | } | |
15342 | else | |
15343 | if (++cursor == ceiling_addr) | |
15344 | break; | |
15345 | } | |
15346 | else | |
15347 | break; | |
15348 | } | |
15349 | start_byte += cursor - base; | |
15350 | } | |
15351 | } | |
59b49f63 RS |
15352 | else |
15353 | { | |
12adba34 RS |
15354 | while (start_byte > limit_byte) |
15355 | { | |
15356 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
15357 | ceiling = max (limit_byte, ceiling); | |
15358 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
15359 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
15360 | while (1) |
15361 | { | |
12adba34 RS |
15362 | if (selective_display) |
15363 | while (--cursor != ceiling_addr | |
15364 | && *cursor != '\n' && *cursor != 015) | |
15365 | ; | |
15366 | else | |
15367 | while (--cursor != ceiling_addr && *cursor != '\n') | |
15368 | ; | |
15369 | ||
59b49f63 RS |
15370 | if (cursor != ceiling_addr) |
15371 | { | |
15372 | if (++count == 0) | |
15373 | { | |
12adba34 RS |
15374 | start_byte += cursor - base + 1; |
15375 | *byte_pos_ptr = start_byte; | |
15376 | /* When scanning backwards, we should | |
15377 | not count the newline posterior to which we stop. */ | |
15378 | return - orig_count - 1; | |
59b49f63 RS |
15379 | } |
15380 | } | |
15381 | else | |
15382 | break; | |
15383 | } | |
12adba34 RS |
15384 | /* Here we add 1 to compensate for the last decrement |
15385 | of CURSOR, which took it past the valid range. */ | |
15386 | start_byte += cursor - base + 1; | |
59b49f63 RS |
15387 | } |
15388 | } | |
15389 | ||
12adba34 | 15390 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 15391 | |
12adba34 RS |
15392 | if (count < 0) |
15393 | return - orig_count + count; | |
15394 | return orig_count - count; | |
aa6d10fa | 15395 | |
12adba34 | 15396 | } |
a2889657 | 15397 | |
a2889657 | 15398 | |
5f5c8ee5 GM |
15399 | \f |
15400 | /*********************************************************************** | |
15401 | Displaying strings | |
15402 | ***********************************************************************/ | |
278feba9 | 15403 | |
5f5c8ee5 | 15404 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 15405 | |
5f5c8ee5 GM |
15406 | If STRING is non-null, display that C string. Otherwise, the Lisp |
15407 | string LISP_STRING is displayed. | |
a2889657 | 15408 | |
5f5c8ee5 GM |
15409 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
15410 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
15411 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 15412 | |
5f5c8ee5 GM |
15413 | Display the string in the environment given by IT, but use the |
15414 | standard display table, temporarily. | |
a3788d53 | 15415 | |
5f5c8ee5 GM |
15416 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
15417 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
15418 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
15419 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
2311178e | 15420 | |
5f5c8ee5 GM |
15421 | PRECISION is the maximum number of characters to output from |
15422 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 15423 | |
5f5c8ee5 | 15424 | This is roughly equivalent to printf format specifiers: |
a2889657 | 15425 | |
5f5c8ee5 GM |
15426 | FIELD_WIDTH PRECISION PRINTF |
15427 | ---------------------------------------- | |
15428 | -1 -1 %s | |
15429 | -1 10 %.10s | |
15430 | 10 -1 %10s | |
15431 | 20 10 %20.10s | |
a2889657 | 15432 | |
5f5c8ee5 GM |
15433 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
15434 | display them, and < 0 means obey the current buffer's value of | |
15435 | enable_multibyte_characters. | |
278feba9 | 15436 | |
5f5c8ee5 | 15437 | Value is the number of glyphs produced. */ |
b1d1124b | 15438 | |
5f5c8ee5 GM |
15439 | static int |
15440 | display_string (string, lisp_string, face_string, face_string_pos, | |
15441 | start, it, field_width, precision, max_x, multibyte) | |
15442 | unsigned char *string; | |
15443 | Lisp_Object lisp_string; | |
68c45bf0 PE |
15444 | Lisp_Object face_string; |
15445 | int face_string_pos; | |
5f5c8ee5 GM |
15446 | int start; |
15447 | struct it *it; | |
15448 | int field_width, precision, max_x; | |
15449 | int multibyte; | |
15450 | { | |
15451 | int hpos_at_start = it->hpos; | |
15452 | int saved_face_id = it->face_id; | |
15453 | struct glyph_row *row = it->glyph_row; | |
15454 | ||
15455 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 15456 | with index START. */ |
5f5c8ee5 GM |
15457 | reseat_to_string (it, string, lisp_string, start, |
15458 | precision, field_width, multibyte); | |
15459 | ||
15460 | /* If displaying STRING, set up the face of the iterator | |
15461 | from LISP_STRING, if that's given. */ | |
15462 | if (STRINGP (face_string)) | |
15463 | { | |
15464 | int endptr; | |
15465 | struct face *face; | |
2311178e | 15466 | |
5f5c8ee5 GM |
15467 | it->face_id |
15468 | = face_at_string_position (it->w, face_string, face_string_pos, | |
15469 | 0, it->region_beg_charpos, | |
15470 | it->region_end_charpos, | |
5de7c6f2 | 15471 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
15472 | face = FACE_FROM_ID (it->f, it->face_id); |
15473 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 15474 | } |
a2889657 | 15475 | |
5f5c8ee5 GM |
15476 | /* Set max_x to the maximum allowed X position. Don't let it go |
15477 | beyond the right edge of the window. */ | |
15478 | if (max_x <= 0) | |
15479 | max_x = it->last_visible_x; | |
15480 | else | |
15481 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 15482 | |
5f5c8ee5 GM |
15483 | /* Skip over display elements that are not visible. because IT->w is |
15484 | hscrolled. */ | |
15485 | if (it->current_x < it->first_visible_x) | |
15486 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
15487 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 15488 | |
5f5c8ee5 GM |
15489 | row->ascent = it->max_ascent; |
15490 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
15491 | row->phys_ascent = it->max_phys_ascent; |
15492 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 15493 | |
5f5c8ee5 GM |
15494 | /* This condition is for the case that we are called with current_x |
15495 | past last_visible_x. */ | |
15496 | while (it->current_x < max_x) | |
a2889657 | 15497 | { |
5f5c8ee5 | 15498 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 15499 | |
5f5c8ee5 GM |
15500 | /* Get the next display element. */ |
15501 | if (!get_next_display_element (it)) | |
90adcf20 | 15502 | break; |
1c9241f5 | 15503 | |
5f5c8ee5 GM |
15504 | /* Produce glyphs. */ |
15505 | x_before = it->current_x; | |
15506 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
15507 | PRODUCE_GLYPHS (it); | |
90adcf20 | 15508 | |
5f5c8ee5 GM |
15509 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
15510 | i = 0; | |
15511 | x = x_before; | |
15512 | while (i < nglyphs) | |
a2889657 | 15513 | { |
5f5c8ee5 | 15514 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
2311178e | 15515 | |
5f5c8ee5 GM |
15516 | if (!it->truncate_lines_p |
15517 | && x + glyph->pixel_width > max_x) | |
15518 | { | |
15519 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
15520 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
15521 | { | |
15522 | /* A wide character is unbreakable. */ | |
15523 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
15524 | it->current_x = x_before; | |
15525 | } | |
15526 | else | |
15527 | { | |
15528 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
15529 | it->current_x = x; | |
15530 | } | |
5f5c8ee5 GM |
15531 | break; |
15532 | } | |
15533 | else if (x + glyph->pixel_width > it->first_visible_x) | |
15534 | { | |
15535 | /* Glyph is at least partially visible. */ | |
15536 | ++it->hpos; | |
15537 | if (x < it->first_visible_x) | |
15538 | it->glyph_row->x = x - it->first_visible_x; | |
15539 | } | |
15540 | else | |
a2889657 | 15541 | { |
5f5c8ee5 GM |
15542 | /* Glyph is off the left margin of the display area. |
15543 | Should not happen. */ | |
15544 | abort (); | |
a2889657 | 15545 | } |
5f5c8ee5 GM |
15546 | |
15547 | row->ascent = max (row->ascent, it->max_ascent); | |
15548 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
15549 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
15550 | row->phys_height = max (row->phys_height, | |
15551 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
15552 | x += glyph->pixel_width; |
15553 | ++i; | |
a2889657 | 15554 | } |
5f5c8ee5 GM |
15555 | |
15556 | /* Stop if max_x reached. */ | |
15557 | if (i < nglyphs) | |
15558 | break; | |
15559 | ||
15560 | /* Stop at line ends. */ | |
15561 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 15562 | { |
5f5c8ee5 GM |
15563 | it->continuation_lines_width = 0; |
15564 | break; | |
a2889657 | 15565 | } |
1c9241f5 | 15566 | |
cafafe0b | 15567 | set_iterator_to_next (it, 1); |
a688bb24 | 15568 | |
5f5c8ee5 GM |
15569 | /* Stop if truncating at the right edge. */ |
15570 | if (it->truncate_lines_p | |
15571 | && it->current_x >= it->last_visible_x) | |
15572 | { | |
15573 | /* Add truncation mark, but don't do it if the line is | |
15574 | truncated at a padding space. */ | |
15575 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 15576 | { |
5f5c8ee5 | 15577 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
15578 | { |
15579 | int i, n; | |
15580 | ||
9299cb15 | 15581 | if (it->current_x > it->last_visible_x) |
37be86f2 | 15582 | { |
9299cb15 KH |
15583 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
15584 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
15585 | break; | |
15586 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
15587 | { | |
15588 | row->used[TEXT_AREA] = i; | |
15589 | produce_special_glyphs (it, IT_TRUNCATION); | |
15590 | } | |
37be86f2 | 15591 | } |
9299cb15 | 15592 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 15593 | } |
5f5c8ee5 | 15594 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 15595 | } |
5f5c8ee5 | 15596 | break; |
1c9241f5 | 15597 | } |
a2889657 JB |
15598 | } |
15599 | ||
5f5c8ee5 GM |
15600 | /* Maybe insert a truncation at the left. */ |
15601 | if (it->first_visible_x | |
15602 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 15603 | { |
5f5c8ee5 GM |
15604 | if (!FRAME_WINDOW_P (it->f)) |
15605 | insert_left_trunc_glyphs (it); | |
15606 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
15607 | } |
15608 | ||
5f5c8ee5 | 15609 | it->face_id = saved_face_id; |
2311178e | 15610 | |
5f5c8ee5 GM |
15611 | /* Value is number of columns displayed. */ |
15612 | return it->hpos - hpos_at_start; | |
15613 | } | |
a2889657 | 15614 | |
a2889657 | 15615 | |
a2889657 | 15616 | \f |
3b6b6db7 | 15617 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
15618 | appears as an element of LIST or as the car of an element of LIST. |
15619 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
15620 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
15621 | Otherwise return 0. This function cannot quit. | |
15622 | The return value is 2 if the text is invisible but with an ellipsis | |
15623 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
15624 | |
15625 | int | |
15626 | invisible_p (propval, list) | |
15627 | register Lisp_Object propval; | |
15628 | Lisp_Object list; | |
15629 | { | |
3b6b6db7 | 15630 | register Lisp_Object tail, proptail; |
2311178e | 15631 | |
3b6b6db7 SM |
15632 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
15633 | { | |
15634 | register Lisp_Object tem; | |
15635 | tem = XCAR (tail); | |
15636 | if (EQ (propval, tem)) | |
15637 | return 1; | |
15638 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
15639 | return NILP (XCDR (tem)) ? 1 : 2; | |
15640 | } | |
2311178e | 15641 | |
3b6b6db7 SM |
15642 | if (CONSP (propval)) |
15643 | { | |
15644 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
15645 | { | |
15646 | Lisp_Object propelt; | |
15647 | propelt = XCAR (proptail); | |
15648 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
15649 | { | |
15650 | register Lisp_Object tem; | |
15651 | tem = XCAR (tail); | |
15652 | if (EQ (propelt, tem)) | |
15653 | return 1; | |
15654 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
15655 | return NILP (XCDR (tem)) ? 1 : 2; | |
15656 | } | |
15657 | } | |
15658 | } | |
2311178e | 15659 | |
3b6b6db7 | 15660 | return 0; |
642eefc6 | 15661 | } |
5f5c8ee5 | 15662 | |
642eefc6 | 15663 | \f |
133c764e KS |
15664 | /*********************************************************************** |
15665 | Glyph Display | |
15666 | ***********************************************************************/ | |
15667 | ||
15668 | #if GLYPH_DEBUG | |
15669 | ||
15670 | void | |
15671 | dump_glyph_string (s) | |
15672 | struct glyph_string *s; | |
15673 | { | |
15674 | fprintf (stderr, "glyph string\n"); | |
15675 | fprintf (stderr, " x, y, w, h = %d, %d, %d, %d\n", | |
15676 | s->x, s->y, s->width, s->height); | |
15677 | fprintf (stderr, " ybase = %d\n", s->ybase); | |
15678 | fprintf (stderr, " hl = %d\n", s->hl); | |
15679 | fprintf (stderr, " left overhang = %d, right = %d\n", | |
15680 | s->left_overhang, s->right_overhang); | |
15681 | fprintf (stderr, " nchars = %d\n", s->nchars); | |
15682 | fprintf (stderr, " extends to end of line = %d\n", | |
15683 | s->extends_to_end_of_line_p); | |
15684 | fprintf (stderr, " font height = %d\n", FONT_HEIGHT (s->font)); | |
15685 | fprintf (stderr, " bg width = %d\n", s->background_width); | |
15686 | } | |
15687 | ||
15688 | #endif /* GLYPH_DEBUG */ | |
15689 | ||
15690 | /* Initialize glyph string S. CHAR2B is a suitably allocated vector | |
15691 | of XChar2b structures for S; it can't be allocated in | |
15692 | init_glyph_string because it must be allocated via `alloca'. W | |
15693 | is the window on which S is drawn. ROW and AREA are the glyph row | |
15694 | and area within the row from which S is constructed. START is the | |
15695 | index of the first glyph structure covered by S. HL is a | |
15696 | face-override for drawing S. */ | |
15697 | ||
15698 | #ifdef HAVE_NTGUI | |
15699 | #define OPTIONAL_HDC(hdc) hdc, | |
15700 | #define DECLARE_HDC(hdc) HDC hdc; | |
15701 | #define ALLOCATE_HDC(hdc, f) hdc = get_frame_dc ((f)) | |
15702 | #define RELEASE_HDC(hdc, f) release_frame_dc ((f), (hdc)) | |
15703 | #endif | |
15704 | ||
15705 | #ifndef OPTIONAL_HDC | |
15706 | #define OPTIONAL_HDC(hdc) | |
15707 | #define DECLARE_HDC(hdc) | |
15708 | #define ALLOCATE_HDC(hdc, f) | |
15709 | #define RELEASE_HDC(hdc, f) | |
15710 | #endif | |
15711 | ||
15712 | static void | |
15713 | init_glyph_string (s, OPTIONAL_HDC (hdc) char2b, w, row, area, start, hl) | |
15714 | struct glyph_string *s; | |
15715 | DECLARE_HDC (hdc) | |
15716 | XChar2b *char2b; | |
15717 | struct window *w; | |
15718 | struct glyph_row *row; | |
15719 | enum glyph_row_area area; | |
15720 | int start; | |
15721 | enum draw_glyphs_face hl; | |
15722 | { | |
15723 | bzero (s, sizeof *s); | |
15724 | s->w = w; | |
15725 | s->f = XFRAME (w->frame); | |
15726 | #ifdef HAVE_NTGUI | |
15727 | s->hdc = hdc; | |
15728 | #endif | |
15729 | s->display = FRAME_X_DISPLAY (s->f); | |
15730 | s->window = FRAME_X_WINDOW (s->f); | |
15731 | s->char2b = char2b; | |
15732 | s->hl = hl; | |
15733 | s->row = row; | |
15734 | s->area = area; | |
15735 | s->first_glyph = row->glyphs[area] + start; | |
15736 | s->height = row->height; | |
15737 | s->y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y); | |
15738 | ||
15739 | /* Display the internal border below the tool-bar window. */ | |
15740 | if (s->w == XWINDOW (s->f->tool_bar_window)) | |
15741 | s->y -= FRAME_INTERNAL_BORDER_WIDTH (s->f); | |
15742 | ||
15743 | s->ybase = s->y + row->ascent; | |
15744 | } | |
15745 | ||
15746 | ||
15747 | /* Append the list of glyph strings with head H and tail T to the list | |
15748 | with head *HEAD and tail *TAIL. Set *HEAD and *TAIL to the result. */ | |
15749 | ||
15750 | static INLINE void | |
15751 | append_glyph_string_lists (head, tail, h, t) | |
15752 | struct glyph_string **head, **tail; | |
15753 | struct glyph_string *h, *t; | |
15754 | { | |
15755 | if (h) | |
15756 | { | |
15757 | if (*head) | |
15758 | (*tail)->next = h; | |
15759 | else | |
15760 | *head = h; | |
15761 | h->prev = *tail; | |
15762 | *tail = t; | |
15763 | } | |
15764 | } | |
15765 | ||
15766 | ||
15767 | /* Prepend the list of glyph strings with head H and tail T to the | |
15768 | list with head *HEAD and tail *TAIL. Set *HEAD and *TAIL to the | |
15769 | result. */ | |
15770 | ||
15771 | static INLINE void | |
15772 | prepend_glyph_string_lists (head, tail, h, t) | |
15773 | struct glyph_string **head, **tail; | |
15774 | struct glyph_string *h, *t; | |
15775 | { | |
15776 | if (h) | |
15777 | { | |
15778 | if (*head) | |
15779 | (*head)->prev = t; | |
15780 | else | |
15781 | *tail = t; | |
15782 | t->next = *head; | |
15783 | *head = h; | |
15784 | } | |
15785 | } | |
15786 | ||
15787 | ||
15788 | /* Append glyph string S to the list with head *HEAD and tail *TAIL. | |
15789 | Set *HEAD and *TAIL to the resulting list. */ | |
15790 | ||
15791 | static INLINE void | |
15792 | append_glyph_string (head, tail, s) | |
15793 | struct glyph_string **head, **tail; | |
15794 | struct glyph_string *s; | |
15795 | { | |
15796 | s->next = s->prev = NULL; | |
15797 | append_glyph_string_lists (head, tail, s, s); | |
15798 | } | |
15799 | ||
15800 | ||
15801 | /* Get face and two-byte form of character glyph GLYPH on frame F. | |
15802 | The encoding of GLYPH->u.ch is returned in *CHAR2B. Value is | |
15803 | a pointer to a realized face that is ready for display. */ | |
15804 | ||
15805 | static INLINE struct face * | |
15806 | get_glyph_face_and_encoding (f, glyph, char2b, two_byte_p) | |
15807 | struct frame *f; | |
15808 | struct glyph *glyph; | |
15809 | XChar2b *char2b; | |
15810 | int *two_byte_p; | |
15811 | { | |
15812 | struct face *face; | |
15813 | ||
15814 | xassert (glyph->type == CHAR_GLYPH); | |
15815 | face = FACE_FROM_ID (f, glyph->face_id); | |
15816 | ||
15817 | if (two_byte_p) | |
15818 | *two_byte_p = 0; | |
15819 | ||
15820 | if (!glyph->multibyte_p) | |
15821 | { | |
15822 | /* Unibyte case. We don't have to encode, but we have to make | |
15823 | sure to use a face suitable for unibyte. */ | |
15824 | STORE_XCHAR2B (char2b, 0, glyph->u.ch); | |
15825 | } | |
15826 | else if (glyph->u.ch < 128 | |
15827 | && glyph->face_id < BASIC_FACE_ID_SENTINEL) | |
15828 | { | |
15829 | /* Case of ASCII in a face known to fit ASCII. */ | |
15830 | STORE_XCHAR2B (char2b, 0, glyph->u.ch); | |
15831 | } | |
15832 | else | |
15833 | { | |
15834 | int c1, c2, charset; | |
15835 | ||
15836 | /* Split characters into bytes. If c2 is -1 afterwards, C is | |
15837 | really a one-byte character so that byte1 is zero. */ | |
15838 | SPLIT_CHAR (glyph->u.ch, charset, c1, c2); | |
15839 | if (c2 > 0) | |
15840 | STORE_XCHAR2B (char2b, c1, c2); | |
15841 | else | |
15842 | STORE_XCHAR2B (char2b, 0, c1); | |
15843 | ||
15844 | /* Maybe encode the character in *CHAR2B. */ | |
15845 | if (charset != CHARSET_ASCII) | |
15846 | { | |
15847 | struct font_info *font_info | |
15848 | = FONT_INFO_FROM_ID (f, face->font_info_id); | |
15849 | if (font_info) | |
15850 | glyph->font_type | |
15851 | = rif->encode_char (glyph->u.ch, char2b, font_info, two_byte_p); | |
15852 | } | |
15853 | } | |
15854 | ||
15855 | /* Make sure X resources of the face are allocated. */ | |
15856 | xassert (face != NULL); | |
15857 | PREPARE_FACE_FOR_DISPLAY (f, face); | |
15858 | return face; | |
15859 | } | |
15860 | ||
15861 | ||
15862 | /* Fill glyph string S with composition components specified by S->cmp. | |
15863 | ||
15864 | FACES is an array of faces for all components of this composition. | |
15865 | S->gidx is the index of the first component for S. | |
15866 | OVERLAPS_P non-zero means S should draw the foreground only, and | |
15867 | use its physical height for clipping. | |
15868 | ||
15869 | Value is the index of a component not in S. */ | |
15870 | ||
15871 | static int | |
15872 | fill_composite_glyph_string (s, faces, overlaps_p) | |
15873 | struct glyph_string *s; | |
15874 | struct face **faces; | |
15875 | int overlaps_p; | |
15876 | { | |
15877 | int i; | |
15878 | ||
15879 | xassert (s); | |
15880 | ||
15881 | s->for_overlaps_p = overlaps_p; | |
15882 | ||
15883 | s->face = faces[s->gidx]; | |
15884 | s->font = s->face->font; | |
15885 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
15886 | ||
15887 | /* For all glyphs of this composition, starting at the offset | |
15888 | S->gidx, until we reach the end of the definition or encounter a | |
15889 | glyph that requires the different face, add it to S. */ | |
15890 | ++s->nchars; | |
15891 | for (i = s->gidx + 1; i < s->cmp->glyph_len && faces[i] == s->face; ++i) | |
15892 | ++s->nchars; | |
15893 | ||
15894 | /* All glyph strings for the same composition has the same width, | |
15895 | i.e. the width set for the first component of the composition. */ | |
15896 | ||
15897 | s->width = s->first_glyph->pixel_width; | |
15898 | ||
15899 | /* If the specified font could not be loaded, use the frame's | |
15900 | default font, but record the fact that we couldn't load it in | |
15901 | the glyph string so that we can draw rectangles for the | |
15902 | characters of the glyph string. */ | |
15903 | if (s->font == NULL) | |
15904 | { | |
15905 | s->font_not_found_p = 1; | |
15906 | s->font = FRAME_FONT (s->f); | |
15907 | } | |
15908 | ||
15909 | /* Adjust base line for subscript/superscript text. */ | |
15910 | s->ybase += s->first_glyph->voffset; | |
15911 | ||
15912 | xassert (s->face && s->face->gc); | |
15913 | ||
15914 | /* This glyph string must always be drawn with 16-bit functions. */ | |
15915 | s->two_byte_p = 1; | |
15916 | ||
15917 | return s->gidx + s->nchars; | |
15918 | } | |
15919 | ||
15920 | ||
15921 | /* Fill glyph string S from a sequence of character glyphs. | |
15922 | ||
15923 | FACE_ID is the face id of the string. START is the index of the | |
15924 | first glyph to consider, END is the index of the last + 1. | |
15925 | OVERLAPS_P non-zero means S should draw the foreground only, and | |
15926 | use its physical height for clipping. | |
15927 | ||
15928 | Value is the index of the first glyph not in S. */ | |
15929 | ||
15930 | static int | |
15931 | fill_glyph_string (s, face_id, start, end, overlaps_p) | |
15932 | struct glyph_string *s; | |
15933 | int face_id; | |
15934 | int start, end, overlaps_p; | |
15935 | { | |
15936 | struct glyph *glyph, *last; | |
15937 | int voffset; | |
15938 | int glyph_not_available_p; | |
15939 | ||
15940 | xassert (s->f == XFRAME (s->w->frame)); | |
15941 | xassert (s->nchars == 0); | |
15942 | xassert (start >= 0 && end > start); | |
15943 | ||
15944 | s->for_overlaps_p = overlaps_p, | |
15945 | glyph = s->row->glyphs[s->area] + start; | |
15946 | last = s->row->glyphs[s->area] + end; | |
15947 | voffset = glyph->voffset; | |
15948 | ||
15949 | glyph_not_available_p = glyph->glyph_not_available_p; | |
15950 | ||
15951 | while (glyph < last | |
15952 | && glyph->type == CHAR_GLYPH | |
15953 | && glyph->voffset == voffset | |
15954 | /* Same face id implies same font, nowadays. */ | |
15955 | && glyph->face_id == face_id | |
15956 | && glyph->glyph_not_available_p == glyph_not_available_p) | |
15957 | { | |
15958 | int two_byte_p; | |
15959 | ||
15960 | s->face = get_glyph_face_and_encoding (s->f, glyph, | |
15961 | s->char2b + s->nchars, | |
15962 | &two_byte_p); | |
15963 | s->two_byte_p = two_byte_p; | |
15964 | ++s->nchars; | |
15965 | xassert (s->nchars <= end - start); | |
15966 | s->width += glyph->pixel_width; | |
15967 | ++glyph; | |
15968 | } | |
15969 | ||
15970 | s->font = s->face->font; | |
15971 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
15972 | ||
15973 | /* If the specified font could not be loaded, use the frame's font, | |
15974 | but record the fact that we couldn't load it in | |
15975 | S->font_not_found_p so that we can draw rectangles for the | |
15976 | characters of the glyph string. */ | |
15977 | if (s->font == NULL || glyph_not_available_p) | |
15978 | { | |
15979 | s->font_not_found_p = 1; | |
15980 | s->font = FRAME_FONT (s->f); | |
15981 | } | |
15982 | ||
15983 | /* Adjust base line for subscript/superscript text. */ | |
15984 | s->ybase += voffset; | |
15985 | ||
15986 | xassert (s->face && s->face->gc); | |
15987 | return glyph - s->row->glyphs[s->area]; | |
15988 | } | |
15989 | ||
15990 | ||
15991 | /* Fill glyph string S from image glyph S->first_glyph. */ | |
15992 | ||
15993 | static void | |
15994 | fill_image_glyph_string (s) | |
15995 | struct glyph_string *s; | |
15996 | { | |
15997 | xassert (s->first_glyph->type == IMAGE_GLYPH); | |
15998 | s->img = IMAGE_FROM_ID (s->f, s->first_glyph->u.img_id); | |
15999 | xassert (s->img); | |
16000 | s->face = FACE_FROM_ID (s->f, s->first_glyph->face_id); | |
16001 | s->font = s->face->font; | |
16002 | s->width = s->first_glyph->pixel_width; | |
16003 | ||
16004 | /* Adjust base line for subscript/superscript text. */ | |
16005 | s->ybase += s->first_glyph->voffset; | |
16006 | } | |
16007 | ||
16008 | ||
16009 | /* Fill glyph string S from a sequence of stretch glyphs. | |
16010 | ||
16011 | ROW is the glyph row in which the glyphs are found, AREA is the | |
16012 | area within the row. START is the index of the first glyph to | |
16013 | consider, END is the index of the last + 1. | |
16014 | ||
16015 | Value is the index of the first glyph not in S. */ | |
16016 | ||
16017 | static int | |
16018 | fill_stretch_glyph_string (s, row, area, start, end) | |
16019 | struct glyph_string *s; | |
16020 | struct glyph_row *row; | |
16021 | enum glyph_row_area area; | |
16022 | int start, end; | |
16023 | { | |
16024 | struct glyph *glyph, *last; | |
16025 | int voffset, face_id; | |
16026 | ||
16027 | xassert (s->first_glyph->type == STRETCH_GLYPH); | |
16028 | ||
16029 | glyph = s->row->glyphs[s->area] + start; | |
16030 | last = s->row->glyphs[s->area] + end; | |
16031 | face_id = glyph->face_id; | |
16032 | s->face = FACE_FROM_ID (s->f, face_id); | |
16033 | s->font = s->face->font; | |
16034 | s->font_info = FONT_INFO_FROM_ID (s->f, s->face->font_info_id); | |
16035 | s->width = glyph->pixel_width; | |
16036 | voffset = glyph->voffset; | |
16037 | ||
16038 | for (++glyph; | |
16039 | (glyph < last | |
16040 | && glyph->type == STRETCH_GLYPH | |
16041 | && glyph->voffset == voffset | |
16042 | && glyph->face_id == face_id); | |
16043 | ++glyph) | |
16044 | s->width += glyph->pixel_width; | |
16045 | ||
16046 | /* Adjust base line for subscript/superscript text. */ | |
16047 | s->ybase += voffset; | |
16048 | ||
16049 | /* The case that face->gc == 0 is handled when drawing the glyph | |
16050 | string by calling PREPARE_FACE_FOR_DISPLAY. */ | |
16051 | xassert (s->face); | |
16052 | return glyph - s->row->glyphs[s->area]; | |
16053 | } | |
16054 | ||
16055 | ||
16056 | /* EXPORT for RIF: | |
16057 | Set *LEFT and *RIGHT to the left and right overhang of GLYPH on | |
16058 | frame F. Overhangs of glyphs other than type CHAR_GLYPH are | |
16059 | assumed to be zero. */ | |
16060 | ||
16061 | void | |
16062 | x_get_glyph_overhangs (glyph, f, left, right) | |
16063 | struct glyph *glyph; | |
16064 | struct frame *f; | |
16065 | int *left, *right; | |
16066 | { | |
16067 | *left = *right = 0; | |
16068 | ||
16069 | if (glyph->type == CHAR_GLYPH) | |
16070 | { | |
16071 | XFontStruct *font; | |
16072 | struct face *face; | |
16073 | struct font_info *font_info; | |
16074 | XChar2b char2b; | |
16075 | XCharStruct *pcm; | |
16076 | ||
16077 | face = get_glyph_face_and_encoding (f, glyph, &char2b, NULL); | |
16078 | font = face->font; | |
16079 | font_info = FONT_INFO_FROM_ID (f, face->font_info_id); | |
16080 | if (font /* ++KFS: Should this be font_info ? */ | |
16081 | && (pcm = rif->per_char_metric (font, &char2b, glyph->font_type))) | |
16082 | { | |
16083 | if (pcm->rbearing > pcm->width) | |
16084 | *right = pcm->rbearing - pcm->width; | |
16085 | if (pcm->lbearing < 0) | |
16086 | *left = -pcm->lbearing; | |
16087 | } | |
16088 | } | |
16089 | } | |
16090 | ||
16091 | ||
16092 | /* Return the index of the first glyph preceding glyph string S that | |
16093 | is overwritten by S because of S's left overhang. Value is -1 | |
16094 | if no glyphs are overwritten. */ | |
16095 | ||
16096 | static int | |
16097 | left_overwritten (s) | |
16098 | struct glyph_string *s; | |
16099 | { | |
16100 | int k; | |
16101 | ||
16102 | if (s->left_overhang) | |
16103 | { | |
16104 | int x = 0, i; | |
16105 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16106 | int first = s->first_glyph - glyphs; | |
16107 | ||
16108 | for (i = first - 1; i >= 0 && x > -s->left_overhang; --i) | |
16109 | x -= glyphs[i].pixel_width; | |
16110 | ||
16111 | k = i + 1; | |
16112 | } | |
16113 | else | |
16114 | k = -1; | |
16115 | ||
16116 | return k; | |
16117 | } | |
16118 | ||
16119 | ||
16120 | /* Return the index of the first glyph preceding glyph string S that | |
16121 | is overwriting S because of its right overhang. Value is -1 if no | |
16122 | glyph in front of S overwrites S. */ | |
16123 | ||
16124 | static int | |
16125 | left_overwriting (s) | |
16126 | struct glyph_string *s; | |
16127 | { | |
16128 | int i, k, x; | |
16129 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16130 | int first = s->first_glyph - glyphs; | |
16131 | ||
16132 | k = -1; | |
16133 | x = 0; | |
16134 | for (i = first - 1; i >= 0; --i) | |
16135 | { | |
16136 | int left, right; | |
16137 | x_get_glyph_overhangs (glyphs + i, s->f, &left, &right); | |
16138 | if (x + right > 0) | |
16139 | k = i; | |
16140 | x -= glyphs[i].pixel_width; | |
16141 | } | |
16142 | ||
16143 | return k; | |
16144 | } | |
16145 | ||
16146 | ||
16147 | /* Return the index of the last glyph following glyph string S that is | |
16148 | not overwritten by S because of S's right overhang. Value is -1 if | |
16149 | no such glyph is found. */ | |
16150 | ||
16151 | static int | |
16152 | right_overwritten (s) | |
16153 | struct glyph_string *s; | |
16154 | { | |
16155 | int k = -1; | |
16156 | ||
16157 | if (s->right_overhang) | |
16158 | { | |
16159 | int x = 0, i; | |
16160 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16161 | int first = (s->first_glyph - glyphs) + (s->cmp ? 1 : s->nchars); | |
16162 | int end = s->row->used[s->area]; | |
16163 | ||
16164 | for (i = first; i < end && s->right_overhang > x; ++i) | |
16165 | x += glyphs[i].pixel_width; | |
16166 | ||
16167 | k = i; | |
16168 | } | |
16169 | ||
16170 | return k; | |
16171 | } | |
16172 | ||
16173 | ||
16174 | /* Return the index of the last glyph following glyph string S that | |
16175 | overwrites S because of its left overhang. Value is negative | |
16176 | if no such glyph is found. */ | |
16177 | ||
16178 | static int | |
16179 | right_overwriting (s) | |
16180 | struct glyph_string *s; | |
16181 | { | |
16182 | int i, k, x; | |
16183 | int end = s->row->used[s->area]; | |
16184 | struct glyph *glyphs = s->row->glyphs[s->area]; | |
16185 | int first = (s->first_glyph - glyphs) + (s->cmp ? 1 : s->nchars); | |
16186 | ||
16187 | k = -1; | |
16188 | x = 0; | |
16189 | for (i = first; i < end; ++i) | |
16190 | { | |
16191 | int left, right; | |
16192 | x_get_glyph_overhangs (glyphs + i, s->f, &left, &right); | |
16193 | if (x - left < 0) | |
16194 | k = i; | |
16195 | x += glyphs[i].pixel_width; | |
16196 | } | |
16197 | ||
16198 | return k; | |
16199 | } | |
16200 | ||
16201 | ||
16202 | /* Get face and two-byte form of character C in face FACE_ID on frame | |
16203 | F. The encoding of C is returned in *CHAR2B. MULTIBYTE_P non-zero | |
16204 | means we want to display multibyte text. DISPLAY_P non-zero means | |
16205 | make sure that X resources for the face returned are allocated. | |
16206 | Value is a pointer to a realized face that is ready for display if | |
16207 | DISPLAY_P is non-zero. */ | |
16208 | ||
16209 | static INLINE struct face * | |
16210 | get_char_face_and_encoding (f, c, face_id, char2b, multibyte_p, display_p) | |
16211 | struct frame *f; | |
16212 | int c, face_id; | |
16213 | XChar2b *char2b; | |
16214 | int multibyte_p, display_p; | |
16215 | { | |
16216 | struct face *face = FACE_FROM_ID (f, face_id); | |
16217 | ||
16218 | if (!multibyte_p) | |
16219 | { | |
16220 | /* Unibyte case. We don't have to encode, but we have to make | |
16221 | sure to use a face suitable for unibyte. */ | |
16222 | STORE_XCHAR2B (char2b, 0, c); | |
16223 | face_id = FACE_FOR_CHAR (f, face, c); | |
16224 | face = FACE_FROM_ID (f, face_id); | |
16225 | } | |
16226 | else if (c < 128 && face_id < BASIC_FACE_ID_SENTINEL) | |
16227 | { | |
16228 | /* Case of ASCII in a face known to fit ASCII. */ | |
16229 | STORE_XCHAR2B (char2b, 0, c); | |
16230 | } | |
16231 | else | |
16232 | { | |
16233 | int c1, c2, charset; | |
16234 | ||
16235 | /* Split characters into bytes. If c2 is -1 afterwards, C is | |
16236 | really a one-byte character so that byte1 is zero. */ | |
16237 | SPLIT_CHAR (c, charset, c1, c2); | |
16238 | if (c2 > 0) | |
16239 | STORE_XCHAR2B (char2b, c1, c2); | |
16240 | else | |
16241 | STORE_XCHAR2B (char2b, 0, c1); | |
16242 | ||
16243 | /* Maybe encode the character in *CHAR2B. */ | |
16244 | if (face->font != NULL) | |
16245 | { | |
16246 | struct font_info *font_info | |
16247 | = FONT_INFO_FROM_ID (f, face->font_info_id); | |
16248 | if (font_info) | |
16249 | rif->encode_char (c, char2b, font_info, 0); | |
16250 | } | |
16251 | } | |
16252 | ||
16253 | /* Make sure X resources of the face are allocated. */ | |
16254 | #ifdef HAVE_X_WINDOWS | |
16255 | if (display_p) | |
16256 | #endif | |
16257 | { | |
16258 | xassert (face != NULL); | |
16259 | PREPARE_FACE_FOR_DISPLAY (f, face); | |
16260 | } | |
16261 | ||
16262 | return face; | |
16263 | } | |
16264 | ||
16265 | ||
16266 | /* Set background width of glyph string S. START is the index of the | |
16267 | first glyph following S. LAST_X is the right-most x-position + 1 | |
16268 | in the drawing area. */ | |
16269 | ||
16270 | static INLINE void | |
16271 | set_glyph_string_background_width (s, start, last_x) | |
16272 | struct glyph_string *s; | |
16273 | int start; | |
16274 | int last_x; | |
16275 | { | |
16276 | /* If the face of this glyph string has to be drawn to the end of | |
16277 | the drawing area, set S->extends_to_end_of_line_p. */ | |
16278 | struct face *default_face = FACE_FROM_ID (s->f, DEFAULT_FACE_ID); | |
16279 | ||
16280 | if (start == s->row->used[s->area] | |
16281 | && s->area == TEXT_AREA | |
16282 | && ((s->hl == DRAW_NORMAL_TEXT | |
16283 | && (s->row->fill_line_p | |
16284 | || s->face->background != default_face->background | |
16285 | || s->face->stipple != default_face->stipple | |
16286 | || s->row->mouse_face_p)) | |
16287 | || s->hl == DRAW_MOUSE_FACE | |
16288 | || ((s->hl == DRAW_IMAGE_RAISED || s->hl == DRAW_IMAGE_SUNKEN) | |
16289 | && s->row->fill_line_p))) | |
16290 | s->extends_to_end_of_line_p = 1; | |
16291 | ||
16292 | /* If S extends its face to the end of the line, set its | |
16293 | background_width to the distance to the right edge of the drawing | |
16294 | area. */ | |
16295 | if (s->extends_to_end_of_line_p) | |
16296 | s->background_width = last_x - s->x + 1; | |
16297 | else | |
16298 | s->background_width = s->width; | |
16299 | } | |
16300 | ||
16301 | ||
16302 | /* Compute overhangs and x-positions for glyph string S and its | |
16303 | predecessors, or successors. X is the starting x-position for S. | |
16304 | BACKWARD_P non-zero means process predecessors. */ | |
16305 | ||
16306 | static void | |
16307 | compute_overhangs_and_x (s, x, backward_p) | |
16308 | struct glyph_string *s; | |
16309 | int x; | |
16310 | int backward_p; | |
16311 | { | |
16312 | if (backward_p) | |
16313 | { | |
16314 | while (s) | |
16315 | { | |
16316 | if (rif->compute_glyph_string_overhangs) | |
16317 | rif->compute_glyph_string_overhangs (s); | |
16318 | x -= s->width; | |
16319 | s->x = x; | |
16320 | s = s->prev; | |
16321 | } | |
16322 | } | |
16323 | else | |
16324 | { | |
16325 | while (s) | |
16326 | { | |
16327 | if (rif->compute_glyph_string_overhangs) | |
16328 | rif->compute_glyph_string_overhangs (s); | |
16329 | s->x = x; | |
16330 | x += s->width; | |
16331 | s = s->next; | |
16332 | } | |
16333 | } | |
16334 | } | |
16335 | ||
16336 | ||
16337 | ||
16338 | /* The following macros are only called from x_draw_glyphs below. | |
16339 | They reference the following parameters of that function directly: | |
16340 | `w', `row', `area', and `overlap_p' | |
16341 | as well as the following local variables: | |
16342 | `s', `f', and `hdc' (in W32) */ | |
16343 | ||
16344 | #ifdef HAVE_NTGUI | |
16345 | /* On W32, silently add local `hdc' variable to argument list of | |
16346 | init_glyph_string. */ | |
16347 | #define INIT_GLYPH_STRING(s, char2b, w, row, area, start, hl) \ | |
16348 | init_glyph_string (s, hdc, char2b, w, row, area, start, hl) | |
16349 | #else | |
16350 | #define INIT_GLYPH_STRING(s, char2b, w, row, area, start, hl) \ | |
16351 | init_glyph_string (s, char2b, w, row, area, start, hl) | |
16352 | #endif | |
16353 | ||
16354 | /* Add a glyph string for a stretch glyph to the list of strings | |
16355 | between HEAD and TAIL. START is the index of the stretch glyph in | |
16356 | row area AREA of glyph row ROW. END is the index of the last glyph | |
16357 | in that glyph row area. X is the current output position assigned | |
16358 | to the new glyph string constructed. HL overrides that face of the | |
16359 | glyph; e.g. it is DRAW_CURSOR if a cursor has to be drawn. LAST_X | |
16360 | is the right-most x-position of the drawing area. */ | |
16361 | ||
16362 | /* SunOS 4 bundled cc, barfed on continuations in the arg lists here | |
16363 | and below -- keep them on one line. */ | |
16364 | #define BUILD_STRETCH_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
16365 | do \ | |
16366 | { \ | |
16367 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
16368 | INIT_GLYPH_STRING (s, NULL, w, row, area, START, HL); \ | |
16369 | START = fill_stretch_glyph_string (s, row, area, START, END); \ | |
16370 | append_glyph_string (&HEAD, &TAIL, s); \ | |
16371 | s->x = (X); \ | |
16372 | } \ | |
16373 | while (0) | |
16374 | ||
16375 | ||
16376 | /* Add a glyph string for an image glyph to the list of strings | |
16377 | between HEAD and TAIL. START is the index of the image glyph in | |
16378 | row area AREA of glyph row ROW. END is the index of the last glyph | |
16379 | in that glyph row area. X is the current output position assigned | |
16380 | to the new glyph string constructed. HL overrides that face of the | |
16381 | glyph; e.g. it is DRAW_CURSOR if a cursor has to be drawn. LAST_X | |
16382 | is the right-most x-position of the drawing area. */ | |
16383 | ||
16384 | #define BUILD_IMAGE_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
16385 | do \ | |
16386 | { \ | |
16387 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
16388 | INIT_GLYPH_STRING (s, NULL, w, row, area, START, HL); \ | |
16389 | fill_image_glyph_string (s); \ | |
16390 | append_glyph_string (&HEAD, &TAIL, s); \ | |
16391 | ++START; \ | |
16392 | s->x = (X); \ | |
16393 | } \ | |
16394 | while (0) | |
16395 | ||
16396 | ||
16397 | /* Add a glyph string for a sequence of character glyphs to the list | |
16398 | of strings between HEAD and TAIL. START is the index of the first | |
16399 | glyph in row area AREA of glyph row ROW that is part of the new | |
16400 | glyph string. END is the index of the last glyph in that glyph row | |
16401 | area. X is the current output position assigned to the new glyph | |
16402 | string constructed. HL overrides that face of the glyph; e.g. it | |
16403 | is DRAW_CURSOR if a cursor has to be drawn. LAST_X is the | |
16404 | right-most x-position of the drawing area. */ | |
16405 | ||
16406 | #define BUILD_CHAR_GLYPH_STRINGS(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
16407 | do \ | |
16408 | { \ | |
16409 | int c, face_id; \ | |
16410 | XChar2b *char2b; \ | |
16411 | \ | |
16412 | c = (row)->glyphs[area][START].u.ch; \ | |
16413 | face_id = (row)->glyphs[area][START].face_id; \ | |
16414 | \ | |
16415 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
16416 | char2b = (XChar2b *) alloca ((END - START) * sizeof *char2b); \ | |
16417 | INIT_GLYPH_STRING (s, char2b, w, row, area, START, HL); \ | |
16418 | append_glyph_string (&HEAD, &TAIL, s); \ | |
16419 | s->x = (X); \ | |
16420 | START = fill_glyph_string (s, face_id, START, END, overlaps_p); \ | |
16421 | } \ | |
16422 | while (0) | |
16423 | ||
16424 | ||
16425 | /* Add a glyph string for a composite sequence to the list of strings | |
16426 | between HEAD and TAIL. START is the index of the first glyph in | |
16427 | row area AREA of glyph row ROW that is part of the new glyph | |
16428 | string. END is the index of the last glyph in that glyph row area. | |
16429 | X is the current output position assigned to the new glyph string | |
16430 | constructed. HL overrides that face of the glyph; e.g. it is | |
16431 | DRAW_CURSOR if a cursor has to be drawn. LAST_X is the right-most | |
16432 | x-position of the drawing area. */ | |
16433 | ||
16434 | #define BUILD_COMPOSITE_GLYPH_STRING(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
16435 | do { \ | |
16436 | int cmp_id = (row)->glyphs[area][START].u.cmp_id; \ | |
16437 | int face_id = (row)->glyphs[area][START].face_id; \ | |
16438 | struct face *base_face = FACE_FROM_ID (f, face_id); \ | |
16439 | struct composition *cmp = composition_table[cmp_id]; \ | |
16440 | int glyph_len = cmp->glyph_len; \ | |
16441 | XChar2b *char2b; \ | |
16442 | struct face **faces; \ | |
16443 | struct glyph_string *first_s = NULL; \ | |
16444 | int n; \ | |
16445 | \ | |
16446 | base_face = base_face->ascii_face; \ | |
16447 | char2b = (XChar2b *) alloca ((sizeof *char2b) * glyph_len); \ | |
16448 | faces = (struct face **) alloca ((sizeof *faces) * glyph_len); \ | |
16449 | /* At first, fill in `char2b' and `faces'. */ \ | |
16450 | for (n = 0; n < glyph_len; n++) \ | |
16451 | { \ | |
16452 | int c = COMPOSITION_GLYPH (cmp, n); \ | |
16453 | int this_face_id = FACE_FOR_CHAR (f, base_face, c); \ | |
16454 | faces[n] = FACE_FROM_ID (f, this_face_id); \ | |
16455 | get_char_face_and_encoding (f, c, this_face_id, \ | |
16456 | char2b + n, 1, 1); \ | |
16457 | } \ | |
16458 | \ | |
16459 | /* Make glyph_strings for each glyph sequence that is drawable by \ | |
16460 | the same face, and append them to HEAD/TAIL. */ \ | |
16461 | for (n = 0; n < cmp->glyph_len;) \ | |
16462 | { \ | |
16463 | s = (struct glyph_string *) alloca (sizeof *s); \ | |
16464 | INIT_GLYPH_STRING (s, char2b + n, w, row, area, START, HL); \ | |
16465 | append_glyph_string (&(HEAD), &(TAIL), s); \ | |
16466 | s->cmp = cmp; \ | |
16467 | s->gidx = n; \ | |
16468 | s->x = (X); \ | |
16469 | \ | |
16470 | if (n == 0) \ | |
16471 | first_s = s; \ | |
16472 | \ | |
16473 | n = fill_composite_glyph_string (s, faces, overlaps_p); \ | |
16474 | } \ | |
16475 | \ | |
16476 | ++START; \ | |
16477 | s = first_s; \ | |
16478 | } while (0) | |
16479 | ||
16480 | ||
16481 | /* Build a list of glyph strings between HEAD and TAIL for the glyphs | |
16482 | of AREA of glyph row ROW on window W between indices START and END. | |
16483 | HL overrides the face for drawing glyph strings, e.g. it is | |
16484 | DRAW_CURSOR to draw a cursor. X and LAST_X are start and end | |
16485 | x-positions of the drawing area. | |
16486 | ||
16487 | This is an ugly monster macro construct because we must use alloca | |
16488 | to allocate glyph strings (because x_draw_glyphs can be called | |
16489 | asynchronously). */ | |
16490 | ||
16491 | #define BUILD_GLYPH_STRINGS(START, END, HEAD, TAIL, HL, X, LAST_X) \ | |
16492 | do \ | |
16493 | { \ | |
16494 | HEAD = TAIL = NULL; \ | |
16495 | while (START < END) \ | |
16496 | { \ | |
16497 | struct glyph *first_glyph = (row)->glyphs[area] + START; \ | |
16498 | switch (first_glyph->type) \ | |
16499 | { \ | |
16500 | case CHAR_GLYPH: \ | |
16501 | BUILD_CHAR_GLYPH_STRINGS (START, END, HEAD, TAIL, \ | |
16502 | HL, X, LAST_X); \ | |
16503 | break; \ | |
16504 | \ | |
16505 | case COMPOSITE_GLYPH: \ | |
16506 | BUILD_COMPOSITE_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
16507 | HL, X, LAST_X); \ | |
16508 | break; \ | |
16509 | \ | |
16510 | case STRETCH_GLYPH: \ | |
16511 | BUILD_STRETCH_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
16512 | HL, X, LAST_X); \ | |
16513 | break; \ | |
16514 | \ | |
16515 | case IMAGE_GLYPH: \ | |
16516 | BUILD_IMAGE_GLYPH_STRING (START, END, HEAD, TAIL, \ | |
16517 | HL, X, LAST_X); \ | |
16518 | break; \ | |
16519 | \ | |
16520 | default: \ | |
16521 | abort (); \ | |
16522 | } \ | |
16523 | \ | |
16524 | set_glyph_string_background_width (s, START, LAST_X); \ | |
16525 | (X) += s->width; \ | |
16526 | } \ | |
16527 | } \ | |
16528 | while (0) | |
16529 | ||
16530 | ||
16531 | /* Draw glyphs between START and END in AREA of ROW on window W, | |
16532 | starting at x-position X. X is relative to AREA in W. HL is a | |
16533 | face-override with the following meaning: | |
16534 | ||
16535 | DRAW_NORMAL_TEXT draw normally | |
16536 | DRAW_CURSOR draw in cursor face | |
16537 | DRAW_MOUSE_FACE draw in mouse face. | |
16538 | DRAW_INVERSE_VIDEO draw in mode line face | |
16539 | DRAW_IMAGE_SUNKEN draw an image with a sunken relief around it | |
16540 | DRAW_IMAGE_RAISED draw an image with a raised relief around it | |
16541 | ||
16542 | If OVERLAPS_P is non-zero, draw only the foreground of characters | |
16543 | and clip to the physical height of ROW. | |
16544 | ||
16545 | Value is the x-position reached, relative to AREA of W. */ | |
16546 | ||
16547 | int | |
16548 | x_draw_glyphs (w, x, row, area, start, end, hl, overlaps_p) | |
16549 | struct window *w; | |
16550 | int x; | |
16551 | struct glyph_row *row; | |
16552 | enum glyph_row_area area; | |
16553 | int start, end; | |
16554 | enum draw_glyphs_face hl; | |
16555 | int overlaps_p; | |
16556 | { | |
16557 | struct glyph_string *head, *tail; | |
16558 | struct glyph_string *s; | |
16559 | int last_x, area_width; | |
16560 | int x_reached; | |
16561 | int i, j; | |
16562 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
16563 | DECLARE_HDC (hdc); | |
16564 | ||
16565 | ALLOCATE_HDC (hdc, f); | |
16566 | ||
16567 | /* Let's rather be paranoid than getting a SEGV. */ | |
16568 | end = min (end, row->used[area]); | |
16569 | start = max (0, start); | |
16570 | start = min (end, start); | |
16571 | ||
16572 | /* Translate X to frame coordinates. Set last_x to the right | |
16573 | end of the drawing area. */ | |
16574 | if (row->full_width_p) | |
16575 | { | |
16576 | /* X is relative to the left edge of W, without scroll bars | |
16577 | or fringes. */ | |
16578 | int window_left_x = WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f); | |
16579 | ||
16580 | x += window_left_x; | |
16581 | area_width = XFASTINT (w->width) * CANON_X_UNIT (f); | |
16582 | last_x = window_left_x + area_width; | |
16583 | ||
16584 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
16585 | { | |
16586 | int width = FRAME_SCROLL_BAR_WIDTH (f) * CANON_X_UNIT (f); | |
16587 | if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)) | |
16588 | last_x += width; | |
16589 | else | |
16590 | x -= width; | |
16591 | } | |
16592 | ||
16593 | x += FRAME_INTERNAL_BORDER_WIDTH (f); | |
16594 | /* ++KFS: W32 and MAC versions had -= in next line (bug??) */ | |
16595 | last_x += FRAME_INTERNAL_BORDER_WIDTH (f); | |
16596 | } | |
16597 | else | |
16598 | { | |
16599 | x = WINDOW_AREA_TO_FRAME_PIXEL_X (w, area, x); | |
16600 | area_width = window_box_width (w, area); | |
16601 | last_x = WINDOW_AREA_TO_FRAME_PIXEL_X (w, area, area_width); | |
16602 | } | |
16603 | ||
16604 | /* Build a doubly-linked list of glyph_string structures between | |
16605 | head and tail from what we have to draw. Note that the macro | |
16606 | BUILD_GLYPH_STRINGS will modify its start parameter. That's | |
16607 | the reason we use a separate variable `i'. */ | |
16608 | i = start; | |
16609 | BUILD_GLYPH_STRINGS (i, end, head, tail, hl, x, last_x); | |
16610 | if (tail) | |
16611 | x_reached = tail->x + tail->background_width; | |
16612 | else | |
16613 | x_reached = x; | |
16614 | ||
16615 | /* If there are any glyphs with lbearing < 0 or rbearing > width in | |
16616 | the row, redraw some glyphs in front or following the glyph | |
16617 | strings built above. */ | |
16618 | if (head && !overlaps_p && row->contains_overlapping_glyphs_p) | |
16619 | { | |
16620 | int dummy_x = 0; | |
16621 | struct glyph_string *h, *t; | |
16622 | ||
16623 | /* Compute overhangs for all glyph strings. */ | |
16624 | if (rif->compute_glyph_string_overhangs) | |
16625 | for (s = head; s; s = s->next) | |
16626 | rif->compute_glyph_string_overhangs (s); | |
16627 | ||
16628 | /* Prepend glyph strings for glyphs in front of the first glyph | |
16629 | string that are overwritten because of the first glyph | |
16630 | string's left overhang. The background of all strings | |
16631 | prepended must be drawn because the first glyph string | |
16632 | draws over it. */ | |
16633 | i = left_overwritten (head); | |
16634 | if (i >= 0) | |
16635 | { | |
16636 | j = i; | |
16637 | BUILD_GLYPH_STRINGS (j, start, h, t, | |
16638 | DRAW_NORMAL_TEXT, dummy_x, last_x); | |
16639 | start = i; | |
16640 | compute_overhangs_and_x (t, head->x, 1); | |
16641 | prepend_glyph_string_lists (&head, &tail, h, t); | |
16642 | } | |
16643 | ||
16644 | /* Prepend glyph strings for glyphs in front of the first glyph | |
16645 | string that overwrite that glyph string because of their | |
16646 | right overhang. For these strings, only the foreground must | |
16647 | be drawn, because it draws over the glyph string at `head'. | |
16648 | The background must not be drawn because this would overwrite | |
16649 | right overhangs of preceding glyphs for which no glyph | |
16650 | strings exist. */ | |
16651 | i = left_overwriting (head); | |
16652 | if (i >= 0) | |
16653 | { | |
16654 | BUILD_GLYPH_STRINGS (i, start, h, t, | |
16655 | DRAW_NORMAL_TEXT, dummy_x, last_x); | |
16656 | for (s = h; s; s = s->next) | |
16657 | s->background_filled_p = 1; | |
16658 | compute_overhangs_and_x (t, head->x, 1); | |
16659 | prepend_glyph_string_lists (&head, &tail, h, t); | |
16660 | } | |
16661 | ||
16662 | /* Append glyphs strings for glyphs following the last glyph | |
16663 | string tail that are overwritten by tail. The background of | |
16664 | these strings has to be drawn because tail's foreground draws | |
16665 | over it. */ | |
16666 | i = right_overwritten (tail); | |
16667 | if (i >= 0) | |
16668 | { | |
16669 | BUILD_GLYPH_STRINGS (end, i, h, t, | |
16670 | DRAW_NORMAL_TEXT, x, last_x); | |
16671 | compute_overhangs_and_x (h, tail->x + tail->width, 0); | |
16672 | append_glyph_string_lists (&head, &tail, h, t); | |
16673 | } | |
16674 | ||
16675 | /* Append glyph strings for glyphs following the last glyph | |
16676 | string tail that overwrite tail. The foreground of such | |
16677 | glyphs has to be drawn because it writes into the background | |
16678 | of tail. The background must not be drawn because it could | |
16679 | paint over the foreground of following glyphs. */ | |
16680 | i = right_overwriting (tail); | |
16681 | if (i >= 0) | |
16682 | { | |
16683 | BUILD_GLYPH_STRINGS (end, i, h, t, | |
16684 | DRAW_NORMAL_TEXT, x, last_x); | |
16685 | for (s = h; s; s = s->next) | |
16686 | s->background_filled_p = 1; | |
16687 | compute_overhangs_and_x (h, tail->x + tail->width, 0); | |
16688 | append_glyph_string_lists (&head, &tail, h, t); | |
16689 | } | |
16690 | } | |
16691 | ||
16692 | /* Draw all strings. */ | |
16693 | for (s = head; s; s = s->next) | |
16694 | rif->draw_glyph_string (s); | |
16695 | ||
16696 | if (area == TEXT_AREA | |
16697 | && !row->full_width_p | |
16698 | /* When drawing overlapping rows, only the glyph strings' | |
16699 | foreground is drawn, which doesn't erase a cursor | |
16700 | completely. */ | |
16701 | && !overlaps_p) | |
16702 | { | |
16703 | int x0 = head ? head->x : x; | |
16704 | int x1 = tail ? tail->x + tail->background_width : x; | |
16705 | ||
16706 | x0 = FRAME_TO_WINDOW_PIXEL_X (w, x0); | |
16707 | x1 = FRAME_TO_WINDOW_PIXEL_X (w, x1); | |
16708 | ||
16709 | /* ++KFS: W32 and MAC versions had following test here: | |
16710 | if (!row->full_width_p && XFASTINT (w->left_margin_width) != 0) | |
16711 | */ | |
16712 | ||
16713 | if (XFASTINT (w->left_margin_width) != 0) | |
16714 | { | |
16715 | int left_area_width = window_box_width (w, LEFT_MARGIN_AREA); | |
16716 | x0 -= left_area_width; | |
16717 | x1 -= left_area_width; | |
16718 | } | |
16719 | ||
16720 | notice_overwritten_cursor (w, area, x0, x1, | |
16721 | row->y, MATRIX_ROW_BOTTOM_Y (row)); | |
16722 | } | |
16723 | ||
16724 | /* Value is the x-position up to which drawn, relative to AREA of W. | |
16725 | This doesn't include parts drawn because of overhangs. */ | |
16726 | x_reached = FRAME_TO_WINDOW_PIXEL_X (w, x_reached); | |
16727 | if (!row->full_width_p) | |
16728 | { | |
16729 | /* ++KFS: W32 and MAC versions only had this test here: | |
16730 | if (area > LEFT_MARGIN_AREA) | |
16731 | */ | |
16732 | ||
16733 | if (area > LEFT_MARGIN_AREA && XFASTINT (w->left_margin_width) != 0) | |
16734 | x_reached -= window_box_width (w, LEFT_MARGIN_AREA); | |
16735 | if (area > TEXT_AREA) | |
16736 | x_reached -= window_box_width (w, TEXT_AREA); | |
16737 | } | |
16738 | ||
16739 | RELEASE_HDC (hdc, f); | |
16740 | ||
16741 | return x_reached; | |
16742 | } | |
16743 | ||
16744 | ||
16745 | /* Store one glyph for IT->char_to_display in IT->glyph_row. | |
16746 | Called from x_produce_glyphs when IT->glyph_row is non-null. */ | |
16747 | ||
16748 | static INLINE void | |
16749 | append_glyph (it) | |
16750 | struct it *it; | |
16751 | { | |
16752 | struct glyph *glyph; | |
16753 | enum glyph_row_area area = it->area; | |
16754 | ||
16755 | xassert (it->glyph_row); | |
16756 | xassert (it->char_to_display != '\n' && it->char_to_display != '\t'); | |
16757 | ||
16758 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
16759 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
16760 | { | |
16761 | glyph->charpos = CHARPOS (it->position); | |
16762 | glyph->object = it->object; | |
16763 | glyph->pixel_width = it->pixel_width; | |
16764 | glyph->voffset = it->voffset; | |
16765 | glyph->type = CHAR_GLYPH; | |
16766 | glyph->multibyte_p = it->multibyte_p; | |
16767 | glyph->left_box_line_p = it->start_of_box_run_p; | |
16768 | glyph->right_box_line_p = it->end_of_box_run_p; | |
16769 | glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent | |
16770 | || it->phys_descent > it->descent); | |
16771 | glyph->padding_p = 0; | |
16772 | glyph->glyph_not_available_p = it->glyph_not_available_p; | |
16773 | glyph->face_id = it->face_id; | |
16774 | glyph->u.ch = it->char_to_display; | |
16775 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
16776 | ++it->glyph_row->used[area]; | |
16777 | } | |
16778 | } | |
16779 | ||
16780 | /* Store one glyph for the composition IT->cmp_id in IT->glyph_row. | |
16781 | Called from x_produce_glyphs when IT->glyph_row is non-null. */ | |
16782 | ||
16783 | static INLINE void | |
16784 | append_composite_glyph (it) | |
16785 | struct it *it; | |
16786 | { | |
16787 | struct glyph *glyph; | |
16788 | enum glyph_row_area area = it->area; | |
16789 | ||
16790 | xassert (it->glyph_row); | |
16791 | ||
16792 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
16793 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
16794 | { | |
16795 | glyph->charpos = CHARPOS (it->position); | |
16796 | glyph->object = it->object; | |
16797 | glyph->pixel_width = it->pixel_width; | |
16798 | glyph->voffset = it->voffset; | |
16799 | glyph->type = COMPOSITE_GLYPH; | |
16800 | glyph->multibyte_p = it->multibyte_p; | |
16801 | glyph->left_box_line_p = it->start_of_box_run_p; | |
16802 | glyph->right_box_line_p = it->end_of_box_run_p; | |
16803 | glyph->overlaps_vertically_p = (it->phys_ascent > it->ascent | |
16804 | || it->phys_descent > it->descent); | |
16805 | glyph->padding_p = 0; | |
16806 | glyph->glyph_not_available_p = 0; | |
16807 | glyph->face_id = it->face_id; | |
16808 | glyph->u.cmp_id = it->cmp_id; | |
16809 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
16810 | ++it->glyph_row->used[area]; | |
16811 | } | |
16812 | } | |
16813 | ||
16814 | ||
16815 | /* Change IT->ascent and IT->height according to the setting of | |
16816 | IT->voffset. */ | |
16817 | ||
16818 | static INLINE void | |
16819 | take_vertical_position_into_account (it) | |
16820 | struct it *it; | |
16821 | { | |
16822 | if (it->voffset) | |
16823 | { | |
16824 | if (it->voffset < 0) | |
16825 | /* Increase the ascent so that we can display the text higher | |
16826 | in the line. */ | |
16827 | it->ascent += abs (it->voffset); | |
16828 | else | |
16829 | /* Increase the descent so that we can display the text lower | |
16830 | in the line. */ | |
16831 | it->descent += it->voffset; | |
16832 | } | |
16833 | } | |
16834 | ||
16835 | ||
16836 | /* Produce glyphs/get display metrics for the image IT is loaded with. | |
16837 | See the description of struct display_iterator in dispextern.h for | |
16838 | an overview of struct display_iterator. */ | |
16839 | ||
16840 | static void | |
16841 | produce_image_glyph (it) | |
16842 | struct it *it; | |
16843 | { | |
16844 | struct image *img; | |
16845 | struct face *face; | |
16846 | ||
16847 | xassert (it->what == IT_IMAGE); | |
16848 | ||
16849 | face = FACE_FROM_ID (it->f, it->face_id); | |
16850 | img = IMAGE_FROM_ID (it->f, it->image_id); | |
16851 | xassert (img); | |
16852 | ||
16853 | /* Make sure X resources of the face and image are loaded. */ | |
16854 | PREPARE_FACE_FOR_DISPLAY (it->f, face); | |
16855 | prepare_image_for_display (it->f, img); | |
16856 | ||
16857 | it->ascent = it->phys_ascent = image_ascent (img, face); | |
16858 | it->descent = it->phys_descent = img->height + 2 * img->vmargin - it->ascent; | |
16859 | it->pixel_width = img->width + 2 * img->hmargin; | |
16860 | ||
16861 | it->nglyphs = 1; | |
16862 | ||
16863 | if (face->box != FACE_NO_BOX) | |
16864 | { | |
16865 | if (face->box_line_width > 0) | |
16866 | { | |
16867 | it->ascent += face->box_line_width; | |
16868 | it->descent += face->box_line_width; | |
16869 | } | |
16870 | ||
16871 | if (it->start_of_box_run_p) | |
16872 | it->pixel_width += abs (face->box_line_width); | |
16873 | if (it->end_of_box_run_p) | |
16874 | it->pixel_width += abs (face->box_line_width); | |
16875 | } | |
16876 | ||
16877 | take_vertical_position_into_account (it); | |
16878 | ||
16879 | if (it->glyph_row) | |
16880 | { | |
16881 | struct glyph *glyph; | |
16882 | enum glyph_row_area area = it->area; | |
16883 | ||
16884 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
16885 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
16886 | { | |
16887 | glyph->charpos = CHARPOS (it->position); | |
16888 | glyph->object = it->object; | |
16889 | glyph->pixel_width = it->pixel_width; | |
16890 | glyph->voffset = it->voffset; | |
16891 | glyph->type = IMAGE_GLYPH; | |
16892 | glyph->multibyte_p = it->multibyte_p; | |
16893 | glyph->left_box_line_p = it->start_of_box_run_p; | |
16894 | glyph->right_box_line_p = it->end_of_box_run_p; | |
16895 | glyph->overlaps_vertically_p = 0; | |
16896 | glyph->padding_p = 0; | |
16897 | glyph->glyph_not_available_p = 0; | |
16898 | glyph->face_id = it->face_id; | |
16899 | glyph->u.img_id = img->id; | |
16900 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
16901 | ++it->glyph_row->used[area]; | |
16902 | } | |
16903 | } | |
16904 | } | |
16905 | ||
16906 | ||
16907 | /* Append a stretch glyph to IT->glyph_row. OBJECT is the source | |
16908 | of the glyph, WIDTH and HEIGHT are the width and height of the | |
16909 | stretch. ASCENT is the percentage/100 of HEIGHT to use for the | |
16910 | ascent of the glyph (0 <= ASCENT <= 1). */ | |
16911 | ||
16912 | static void | |
16913 | append_stretch_glyph (it, object, width, height, ascent) | |
16914 | struct it *it; | |
16915 | Lisp_Object object; | |
16916 | int width, height; | |
16917 | double ascent; | |
16918 | { | |
16919 | struct glyph *glyph; | |
16920 | enum glyph_row_area area = it->area; | |
16921 | ||
16922 | xassert (ascent >= 0 && ascent <= 1); | |
16923 | ||
16924 | glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area]; | |
16925 | if (glyph < it->glyph_row->glyphs[area + 1]) | |
16926 | { | |
16927 | glyph->charpos = CHARPOS (it->position); | |
16928 | glyph->object = object; | |
16929 | glyph->pixel_width = width; | |
16930 | glyph->voffset = it->voffset; | |
16931 | glyph->type = STRETCH_GLYPH; | |
16932 | glyph->multibyte_p = it->multibyte_p; | |
16933 | glyph->left_box_line_p = it->start_of_box_run_p; | |
16934 | glyph->right_box_line_p = it->end_of_box_run_p; | |
16935 | glyph->overlaps_vertically_p = 0; | |
16936 | glyph->padding_p = 0; | |
16937 | glyph->glyph_not_available_p = 0; | |
16938 | glyph->face_id = it->face_id; | |
16939 | glyph->u.stretch.ascent = height * ascent; | |
16940 | glyph->u.stretch.height = height; | |
16941 | glyph->font_type = FONT_TYPE_UNKNOWN; | |
16942 | ++it->glyph_row->used[area]; | |
16943 | } | |
16944 | } | |
16945 | ||
16946 | ||
16947 | /* Produce a stretch glyph for iterator IT. IT->object is the value | |
16948 | of the glyph property displayed. The value must be a list | |
16949 | `(space KEYWORD VALUE ...)' with the following KEYWORD/VALUE pairs | |
16950 | being recognized: | |
16951 | ||
16952 | 1. `:width WIDTH' specifies that the space should be WIDTH * | |
16953 | canonical char width wide. WIDTH may be an integer or floating | |
16954 | point number. | |
16955 | ||
16956 | 2. `:relative-width FACTOR' specifies that the width of the stretch | |
16957 | should be computed from the width of the first character having the | |
16958 | `glyph' property, and should be FACTOR times that width. | |
16959 | ||
16960 | 3. `:align-to HPOS' specifies that the space should be wide enough | |
16961 | to reach HPOS, a value in canonical character units. | |
16962 | ||
16963 | Exactly one of the above pairs must be present. | |
16964 | ||
16965 | 4. `:height HEIGHT' specifies that the height of the stretch produced | |
16966 | should be HEIGHT, measured in canonical character units. | |
16967 | ||
16968 | 5. `:relative-height FACTOR' specifies that the height of the | |
16969 | stretch should be FACTOR times the height of the characters having | |
16970 | the glyph property. | |
16971 | ||
16972 | Either none or exactly one of 4 or 5 must be present. | |
16973 | ||
16974 | 6. `:ascent ASCENT' specifies that ASCENT percent of the height | |
16975 | of the stretch should be used for the ascent of the stretch. | |
16976 | ASCENT must be in the range 0 <= ASCENT <= 100. */ | |
16977 | ||
16978 | #define NUMVAL(X) \ | |
16979 | ((INTEGERP (X) || FLOATP (X)) \ | |
16980 | ? XFLOATINT (X) \ | |
16981 | : - 1) | |
16982 | ||
16983 | ||
16984 | static void | |
16985 | produce_stretch_glyph (it) | |
16986 | struct it *it; | |
16987 | { | |
16988 | /* (space :width WIDTH :height HEIGHT. */ | |
16989 | Lisp_Object prop, plist; | |
16990 | int width = 0, height = 0; | |
16991 | double ascent = 0; | |
16992 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
16993 | XFontStruct *font = face->font ? face->font : FRAME_FONT (it->f); | |
16994 | ||
16995 | PREPARE_FACE_FOR_DISPLAY (it->f, face); | |
16996 | ||
16997 | /* List should start with `space'. */ | |
16998 | xassert (CONSP (it->object) && EQ (XCAR (it->object), Qspace)); | |
16999 | plist = XCDR (it->object); | |
17000 | ||
17001 | /* Compute the width of the stretch. */ | |
17002 | if (prop = Fplist_get (plist, QCwidth), | |
17003 | NUMVAL (prop) > 0) | |
17004 | /* Absolute width `:width WIDTH' specified and valid. */ | |
17005 | width = NUMVAL (prop) * CANON_X_UNIT (it->f); | |
17006 | else if (prop = Fplist_get (plist, QCrelative_width), | |
17007 | NUMVAL (prop) > 0) | |
17008 | { | |
17009 | /* Relative width `:relative-width FACTOR' specified and valid. | |
17010 | Compute the width of the characters having the `glyph' | |
17011 | property. */ | |
17012 | struct it it2; | |
17013 | unsigned char *p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
17014 | ||
17015 | it2 = *it; | |
17016 | if (it->multibyte_p) | |
17017 | { | |
17018 | int maxlen = ((IT_BYTEPOS (*it) >= GPT ? ZV : GPT) | |
17019 | - IT_BYTEPOS (*it)); | |
17020 | it2.c = STRING_CHAR_AND_LENGTH (p, maxlen, it2.len); | |
17021 | } | |
17022 | else | |
17023 | it2.c = *p, it2.len = 1; | |
17024 | ||
17025 | it2.glyph_row = NULL; | |
17026 | it2.what = IT_CHARACTER; | |
17027 | x_produce_glyphs (&it2); | |
17028 | width = NUMVAL (prop) * it2.pixel_width; | |
17029 | } | |
17030 | else if (prop = Fplist_get (plist, QCalign_to), | |
17031 | NUMVAL (prop) > 0) | |
17032 | width = NUMVAL (prop) * CANON_X_UNIT (it->f) - it->current_x; | |
17033 | else | |
17034 | /* Nothing specified -> width defaults to canonical char width. */ | |
17035 | width = CANON_X_UNIT (it->f); | |
17036 | ||
17037 | /* Compute height. */ | |
17038 | if (prop = Fplist_get (plist, QCheight), | |
17039 | NUMVAL (prop) > 0) | |
17040 | height = NUMVAL (prop) * CANON_Y_UNIT (it->f); | |
17041 | else if (prop = Fplist_get (plist, QCrelative_height), | |
17042 | NUMVAL (prop) > 0) | |
17043 | height = FONT_HEIGHT (font) * NUMVAL (prop); | |
17044 | else | |
17045 | height = FONT_HEIGHT (font); | |
17046 | ||
17047 | /* Compute percentage of height used for ascent. If | |
17048 | `:ascent ASCENT' is present and valid, use that. Otherwise, | |
17049 | derive the ascent from the font in use. */ | |
17050 | if (prop = Fplist_get (plist, QCascent), | |
17051 | NUMVAL (prop) > 0 && NUMVAL (prop) <= 100) | |
17052 | ascent = NUMVAL (prop) / 100.0; | |
17053 | else | |
17054 | ascent = (double) FONT_BASE (font) / FONT_HEIGHT (font); | |
17055 | ||
17056 | if (width <= 0) | |
17057 | width = 1; | |
17058 | if (height <= 0) | |
17059 | height = 1; | |
17060 | ||
17061 | if (it->glyph_row) | |
17062 | { | |
17063 | Lisp_Object object = it->stack[it->sp - 1].string; | |
17064 | if (!STRINGP (object)) | |
17065 | object = it->w->buffer; | |
17066 | append_stretch_glyph (it, object, width, height, ascent); | |
17067 | } | |
17068 | ||
17069 | it->pixel_width = width; | |
17070 | it->ascent = it->phys_ascent = height * ascent; | |
17071 | it->descent = it->phys_descent = height - it->ascent; | |
17072 | it->nglyphs = 1; | |
17073 | ||
17074 | if (face->box != FACE_NO_BOX) | |
17075 | { | |
17076 | if (face->box_line_width > 0) | |
17077 | { | |
17078 | it->ascent += face->box_line_width; | |
17079 | it->descent += face->box_line_width; | |
17080 | } | |
17081 | ||
17082 | if (it->start_of_box_run_p) | |
17083 | it->pixel_width += abs (face->box_line_width); | |
17084 | if (it->end_of_box_run_p) | |
17085 | it->pixel_width += abs (face->box_line_width); | |
17086 | } | |
17087 | ||
17088 | take_vertical_position_into_account (it); | |
17089 | } | |
17090 | ||
17091 | /* RIF: | |
17092 | Produce glyphs/get display metrics for the display element IT is | |
17093 | loaded with. See the description of struct display_iterator in | |
17094 | dispextern.h for an overview of struct display_iterator. */ | |
17095 | ||
17096 | void | |
17097 | x_produce_glyphs (it) | |
17098 | struct it *it; | |
17099 | { | |
17100 | it->glyph_not_available_p = 0; | |
17101 | ||
17102 | if (it->what == IT_CHARACTER) | |
17103 | { | |
17104 | XChar2b char2b; | |
17105 | XFontStruct *font; | |
17106 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
17107 | XCharStruct *pcm; | |
17108 | int font_not_found_p; | |
17109 | struct font_info *font_info; | |
17110 | int boff; /* baseline offset */ | |
17111 | /* We may change it->multibyte_p upon unibyte<->multibyte | |
17112 | conversion. So, save the current value now and restore it | |
17113 | later. | |
17114 | ||
17115 | Note: It seems that we don't have to record multibyte_p in | |
17116 | struct glyph because the character code itself tells if or | |
17117 | not the character is multibyte. Thus, in the future, we must | |
17118 | consider eliminating the field `multibyte_p' in the struct | |
17119 | glyph. */ | |
17120 | int saved_multibyte_p = it->multibyte_p; | |
17121 | ||
17122 | /* Maybe translate single-byte characters to multibyte, or the | |
17123 | other way. */ | |
17124 | it->char_to_display = it->c; | |
17125 | if (!ASCII_BYTE_P (it->c)) | |
17126 | { | |
17127 | if (unibyte_display_via_language_environment | |
17128 | && SINGLE_BYTE_CHAR_P (it->c) | |
17129 | && (it->c >= 0240 | |
17130 | || !NILP (Vnonascii_translation_table))) | |
17131 | { | |
17132 | it->char_to_display = unibyte_char_to_multibyte (it->c); | |
17133 | it->multibyte_p = 1; | |
17134 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
17135 | face = FACE_FROM_ID (it->f, it->face_id); | |
17136 | } | |
17137 | else if (!SINGLE_BYTE_CHAR_P (it->c) | |
17138 | && !it->multibyte_p) | |
17139 | { | |
17140 | it->multibyte_p = 1; | |
17141 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
17142 | face = FACE_FROM_ID (it->f, it->face_id); | |
17143 | } | |
17144 | } | |
17145 | ||
17146 | /* Get font to use. Encode IT->char_to_display. */ | |
17147 | get_char_face_and_encoding (it->f, it->char_to_display, it->face_id, | |
17148 | &char2b, it->multibyte_p, 0); | |
17149 | font = face->font; | |
17150 | ||
17151 | /* When no suitable font found, use the default font. */ | |
17152 | font_not_found_p = font == NULL; | |
17153 | if (font_not_found_p) | |
17154 | { | |
17155 | font = FRAME_FONT (it->f); | |
17156 | boff = FRAME_BASELINE_OFFSET (it->f); | |
17157 | font_info = NULL; | |
17158 | } | |
17159 | else | |
17160 | { | |
17161 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
17162 | boff = font_info->baseline_offset; | |
17163 | if (font_info->vertical_centering) | |
17164 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
17165 | } | |
17166 | ||
17167 | if (it->char_to_display >= ' ' | |
17168 | && (!it->multibyte_p || it->char_to_display < 128)) | |
17169 | { | |
17170 | /* Either unibyte or ASCII. */ | |
17171 | int stretched_p; | |
17172 | ||
17173 | it->nglyphs = 1; | |
17174 | ||
17175 | pcm = rif->per_char_metric (font, &char2b, | |
17176 | FONT_TYPE_FOR_UNIBYTE (font, it->char_to_display)); | |
17177 | it->ascent = FONT_BASE (font) + boff; | |
17178 | it->descent = FONT_DESCENT (font) - boff; | |
17179 | ||
17180 | if (pcm) | |
17181 | { | |
17182 | it->phys_ascent = pcm->ascent + boff; | |
17183 | it->phys_descent = pcm->descent - boff; | |
17184 | it->pixel_width = pcm->width; | |
17185 | } | |
17186 | else | |
17187 | { | |
17188 | it->glyph_not_available_p = 1; | |
17189 | it->phys_ascent = FONT_BASE (font) + boff; | |
17190 | it->phys_descent = FONT_DESCENT (font) - boff; | |
17191 | it->pixel_width = FONT_WIDTH (font); | |
17192 | } | |
17193 | ||
17194 | /* If this is a space inside a region of text with | |
17195 | `space-width' property, change its width. */ | |
17196 | stretched_p = it->char_to_display == ' ' && !NILP (it->space_width); | |
17197 | if (stretched_p) | |
17198 | it->pixel_width *= XFLOATINT (it->space_width); | |
17199 | ||
17200 | /* If face has a box, add the box thickness to the character | |
17201 | height. If character has a box line to the left and/or | |
17202 | right, add the box line width to the character's width. */ | |
17203 | if (face->box != FACE_NO_BOX) | |
17204 | { | |
17205 | int thick = face->box_line_width; | |
17206 | ||
17207 | if (thick > 0) | |
17208 | { | |
17209 | it->ascent += thick; | |
17210 | it->descent += thick; | |
17211 | } | |
17212 | else | |
17213 | thick = -thick; | |
17214 | ||
17215 | if (it->start_of_box_run_p) | |
17216 | it->pixel_width += thick; | |
17217 | if (it->end_of_box_run_p) | |
17218 | it->pixel_width += thick; | |
17219 | } | |
17220 | ||
17221 | /* If face has an overline, add the height of the overline | |
17222 | (1 pixel) and a 1 pixel margin to the character height. */ | |
17223 | if (face->overline_p) | |
17224 | it->ascent += 2; | |
17225 | ||
17226 | take_vertical_position_into_account (it); | |
17227 | ||
17228 | /* If we have to actually produce glyphs, do it. */ | |
17229 | if (it->glyph_row) | |
17230 | { | |
17231 | if (stretched_p) | |
17232 | { | |
17233 | /* Translate a space with a `space-width' property | |
17234 | into a stretch glyph. */ | |
17235 | double ascent = (double) FONT_BASE (font) | |
17236 | / FONT_HEIGHT (font); | |
17237 | append_stretch_glyph (it, it->object, it->pixel_width, | |
17238 | it->ascent + it->descent, ascent); | |
17239 | } | |
17240 | else | |
17241 | append_glyph (it); | |
17242 | ||
17243 | /* If characters with lbearing or rbearing are displayed | |
17244 | in this line, record that fact in a flag of the | |
17245 | glyph row. This is used to optimize X output code. */ | |
17246 | if (pcm && (pcm->lbearing < 0 || pcm->rbearing > pcm->width)) | |
17247 | it->glyph_row->contains_overlapping_glyphs_p = 1; | |
17248 | } | |
17249 | } | |
17250 | else if (it->char_to_display == '\n') | |
17251 | { | |
17252 | /* A newline has no width but we need the height of the line. */ | |
17253 | it->pixel_width = 0; | |
17254 | it->nglyphs = 0; | |
17255 | it->ascent = it->phys_ascent = FONT_BASE (font) + boff; | |
17256 | it->descent = it->phys_descent = FONT_DESCENT (font) - boff; | |
17257 | ||
17258 | if (face->box != FACE_NO_BOX | |
17259 | && face->box_line_width > 0) | |
17260 | { | |
17261 | it->ascent += face->box_line_width; | |
17262 | it->descent += face->box_line_width; | |
17263 | } | |
17264 | } | |
17265 | else if (it->char_to_display == '\t') | |
17266 | { | |
17267 | int tab_width = it->tab_width * CANON_X_UNIT (it->f); | |
17268 | int x = it->current_x + it->continuation_lines_width; | |
17269 | int next_tab_x = ((1 + x + tab_width - 1) / tab_width) * tab_width; | |
17270 | ||
17271 | /* If the distance from the current position to the next tab | |
17272 | stop is less than a canonical character width, use the | |
17273 | tab stop after that. */ | |
17274 | if (next_tab_x - x < CANON_X_UNIT (it->f)) | |
17275 | next_tab_x += tab_width; | |
17276 | ||
17277 | it->pixel_width = next_tab_x - x; | |
17278 | it->nglyphs = 1; | |
17279 | it->ascent = it->phys_ascent = FONT_BASE (font) + boff; | |
17280 | it->descent = it->phys_descent = FONT_DESCENT (font) - boff; | |
17281 | ||
17282 | if (it->glyph_row) | |
17283 | { | |
17284 | double ascent = (double) it->ascent / (it->ascent + it->descent); | |
17285 | append_stretch_glyph (it, it->object, it->pixel_width, | |
17286 | it->ascent + it->descent, ascent); | |
17287 | } | |
17288 | } | |
17289 | else | |
17290 | { | |
17291 | /* A multi-byte character. Assume that the display width of the | |
17292 | character is the width of the character multiplied by the | |
17293 | width of the font. */ | |
17294 | ||
17295 | /* If we found a font, this font should give us the right | |
17296 | metrics. If we didn't find a font, use the frame's | |
17297 | default font and calculate the width of the character | |
17298 | from the charset width; this is what old redisplay code | |
17299 | did. */ | |
17300 | ||
17301 | pcm = rif->per_char_metric (font, &char2b, | |
17302 | FONT_TYPE_FOR_MULTIBYTE (font, it->c)); | |
17303 | ||
17304 | if (font_not_found_p || !pcm) | |
17305 | { | |
17306 | int charset = CHAR_CHARSET (it->char_to_display); | |
17307 | ||
17308 | it->glyph_not_available_p = 1; | |
17309 | it->pixel_width = (FONT_WIDTH (FRAME_FONT (it->f)) | |
17310 | * CHARSET_WIDTH (charset)); | |
17311 | it->phys_ascent = FONT_BASE (font) + boff; | |
17312 | it->phys_descent = FONT_DESCENT (font) - boff; | |
17313 | } | |
17314 | else | |
17315 | { | |
17316 | it->pixel_width = pcm->width; | |
17317 | it->phys_ascent = pcm->ascent + boff; | |
17318 | it->phys_descent = pcm->descent - boff; | |
17319 | if (it->glyph_row | |
17320 | && (pcm->lbearing < 0 | |
17321 | || pcm->rbearing > pcm->width)) | |
17322 | it->glyph_row->contains_overlapping_glyphs_p = 1; | |
17323 | } | |
17324 | it->nglyphs = 1; | |
17325 | it->ascent = FONT_BASE (font) + boff; | |
17326 | it->descent = FONT_DESCENT (font) - boff; | |
17327 | if (face->box != FACE_NO_BOX) | |
17328 | { | |
17329 | int thick = face->box_line_width; | |
17330 | ||
17331 | if (thick > 0) | |
17332 | { | |
17333 | it->ascent += thick; | |
17334 | it->descent += thick; | |
17335 | } | |
17336 | else | |
17337 | thick = - thick; | |
17338 | ||
17339 | if (it->start_of_box_run_p) | |
17340 | it->pixel_width += thick; | |
17341 | if (it->end_of_box_run_p) | |
17342 | it->pixel_width += thick; | |
17343 | } | |
17344 | ||
17345 | /* If face has an overline, add the height of the overline | |
17346 | (1 pixel) and a 1 pixel margin to the character height. */ | |
17347 | if (face->overline_p) | |
17348 | it->ascent += 2; | |
17349 | ||
17350 | take_vertical_position_into_account (it); | |
17351 | ||
17352 | if (it->glyph_row) | |
17353 | append_glyph (it); | |
17354 | } | |
17355 | it->multibyte_p = saved_multibyte_p; | |
17356 | } | |
17357 | else if (it->what == IT_COMPOSITION) | |
17358 | { | |
17359 | /* Note: A composition is represented as one glyph in the | |
17360 | glyph matrix. There are no padding glyphs. */ | |
17361 | XChar2b char2b; | |
17362 | XFontStruct *font; | |
17363 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
17364 | XCharStruct *pcm; | |
17365 | int font_not_found_p; | |
17366 | struct font_info *font_info; | |
17367 | int boff; /* baseline offset */ | |
17368 | struct composition *cmp = composition_table[it->cmp_id]; | |
17369 | ||
17370 | /* Maybe translate single-byte characters to multibyte. */ | |
17371 | it->char_to_display = it->c; | |
17372 | if (unibyte_display_via_language_environment | |
17373 | && SINGLE_BYTE_CHAR_P (it->c) | |
17374 | && (it->c >= 0240 | |
17375 | || (it->c >= 0200 | |
17376 | && !NILP (Vnonascii_translation_table)))) | |
17377 | { | |
17378 | it->char_to_display = unibyte_char_to_multibyte (it->c); | |
17379 | } | |
17380 | ||
17381 | /* Get face and font to use. Encode IT->char_to_display. */ | |
17382 | it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display); | |
17383 | face = FACE_FROM_ID (it->f, it->face_id); | |
17384 | get_char_face_and_encoding (it->f, it->char_to_display, it->face_id, | |
17385 | &char2b, it->multibyte_p, 0); | |
17386 | font = face->font; | |
17387 | ||
17388 | /* When no suitable font found, use the default font. */ | |
17389 | font_not_found_p = font == NULL; | |
17390 | if (font_not_found_p) | |
17391 | { | |
17392 | font = FRAME_FONT (it->f); | |
17393 | boff = FRAME_BASELINE_OFFSET (it->f); | |
17394 | font_info = NULL; | |
17395 | } | |
17396 | else | |
17397 | { | |
17398 | font_info = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
17399 | boff = font_info->baseline_offset; | |
17400 | if (font_info->vertical_centering) | |
17401 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
17402 | } | |
17403 | ||
17404 | /* There are no padding glyphs, so there is only one glyph to | |
17405 | produce for the composition. Important is that pixel_width, | |
17406 | ascent and descent are the values of what is drawn by | |
17407 | draw_glyphs (i.e. the values of the overall glyphs composed). */ | |
17408 | it->nglyphs = 1; | |
17409 | ||
17410 | /* If we have not yet calculated pixel size data of glyphs of | |
17411 | the composition for the current face font, calculate them | |
17412 | now. Theoretically, we have to check all fonts for the | |
17413 | glyphs, but that requires much time and memory space. So, | |
17414 | here we check only the font of the first glyph. This leads | |
17415 | to incorrect display very rarely, and C-l (recenter) can | |
17416 | correct the display anyway. */ | |
17417 | if (cmp->font != (void *) font) | |
17418 | { | |
17419 | /* Ascent and descent of the font of the first character of | |
17420 | this composition (adjusted by baseline offset). Ascent | |
17421 | and descent of overall glyphs should not be less than | |
17422 | them respectively. */ | |
17423 | int font_ascent = FONT_BASE (font) + boff; | |
17424 | int font_descent = FONT_DESCENT (font) - boff; | |
17425 | /* Bounding box of the overall glyphs. */ | |
17426 | int leftmost, rightmost, lowest, highest; | |
17427 | int i, width, ascent, descent; | |
17428 | ||
17429 | cmp->font = (void *) font; | |
17430 | ||
17431 | /* Initialize the bounding box. */ | |
17432 | if (font_info | |
17433 | && (pcm = rif->per_char_metric (font, &char2b, | |
17434 | FONT_TYPE_FOR_MULTIBYTE (font, it->c)))) | |
17435 | { | |
17436 | width = pcm->width; | |
17437 | ascent = pcm->ascent; | |
17438 | descent = pcm->descent; | |
17439 | } | |
17440 | else | |
17441 | { | |
17442 | width = FONT_WIDTH (font); | |
17443 | ascent = FONT_BASE (font); | |
17444 | descent = FONT_DESCENT (font); | |
17445 | } | |
17446 | ||
17447 | rightmost = width; | |
17448 | lowest = - descent + boff; | |
17449 | highest = ascent + boff; | |
17450 | leftmost = 0; | |
17451 | ||
17452 | if (font_info | |
17453 | && font_info->default_ascent | |
17454 | && CHAR_TABLE_P (Vuse_default_ascent) | |
17455 | && !NILP (Faref (Vuse_default_ascent, | |
17456 | make_number (it->char_to_display)))) | |
17457 | highest = font_info->default_ascent + boff; | |
17458 | ||
17459 | /* Draw the first glyph at the normal position. It may be | |
17460 | shifted to right later if some other glyphs are drawn at | |
17461 | the left. */ | |
17462 | cmp->offsets[0] = 0; | |
17463 | cmp->offsets[1] = boff; | |
17464 | ||
17465 | /* Set cmp->offsets for the remaining glyphs. */ | |
17466 | for (i = 1; i < cmp->glyph_len; i++) | |
17467 | { | |
17468 | int left, right, btm, top; | |
17469 | int ch = COMPOSITION_GLYPH (cmp, i); | |
17470 | int face_id = FACE_FOR_CHAR (it->f, face, ch); | |
17471 | ||
17472 | face = FACE_FROM_ID (it->f, face_id); | |
17473 | get_char_face_and_encoding (it->f, ch, face->id, | |
17474 | &char2b, it->multibyte_p, 0); | |
17475 | font = face->font; | |
17476 | if (font == NULL) | |
17477 | { | |
17478 | font = FRAME_FONT (it->f); | |
2a6d0874 | 17479 | boff = FRAME_BASELINE_OFFSET (it->f); |
133c764e KS |
17480 | font_info = NULL; |
17481 | } | |
17482 | else | |
17483 | { | |
17484 | font_info | |
17485 | = FONT_INFO_FROM_ID (it->f, face->font_info_id); | |
17486 | boff = font_info->baseline_offset; | |
17487 | if (font_info->vertical_centering) | |
17488 | boff = VCENTER_BASELINE_OFFSET (font, it->f) - boff; | |
17489 | } | |
17490 | ||
17491 | if (font_info | |
2a6d0874 | 17492 | && (pcm = rif->per_char_metric (font, &char2b, |
133c764e KS |
17493 | FONT_TYPE_FOR_MULTIBYTE (font, ch)))) |
17494 | { | |
17495 | width = pcm->width; | |
17496 | ascent = pcm->ascent; | |
17497 | descent = pcm->descent; | |
17498 | } | |
17499 | else | |
17500 | { | |
17501 | width = FONT_WIDTH (font); | |
17502 | ascent = 1; | |
17503 | descent = 0; | |
17504 | } | |
17505 | ||
17506 | if (cmp->method != COMPOSITION_WITH_RULE_ALTCHARS) | |
17507 | { | |
17508 | /* Relative composition with or without | |
17509 | alternate chars. */ | |
17510 | left = (leftmost + rightmost - width) / 2; | |
17511 | btm = - descent + boff; | |
17512 | if (font_info && font_info->relative_compose | |
17513 | && (! CHAR_TABLE_P (Vignore_relative_composition) | |
17514 | || NILP (Faref (Vignore_relative_composition, | |
17515 | make_number (ch))))) | |
17516 | { | |
17517 | ||
17518 | if (- descent >= font_info->relative_compose) | |
17519 | /* One extra pixel between two glyphs. */ | |
17520 | btm = highest + 1; | |
17521 | else if (ascent <= 0) | |
17522 | /* One extra pixel between two glyphs. */ | |
17523 | btm = lowest - 1 - ascent - descent; | |
17524 | } | |
17525 | } | |
17526 | else | |
17527 | { | |
17528 | /* A composition rule is specified by an integer | |
17529 | value that encodes global and new reference | |
17530 | points (GREF and NREF). GREF and NREF are | |
17531 | specified by numbers as below: | |
17532 | ||
17533 | 0---1---2 -- ascent | |
17534 | | | | |
17535 | | | | |
17536 | | | | |
17537 | 9--10--11 -- center | |
17538 | | | | |
17539 | ---3---4---5--- baseline | |
17540 | | | | |
17541 | 6---7---8 -- descent | |
17542 | */ | |
17543 | int rule = COMPOSITION_RULE (cmp, i); | |
17544 | int gref, nref, grefx, grefy, nrefx, nrefy; | |
17545 | ||
17546 | COMPOSITION_DECODE_RULE (rule, gref, nref); | |
17547 | grefx = gref % 3, nrefx = nref % 3; | |
17548 | grefy = gref / 3, nrefy = nref / 3; | |
17549 | ||
17550 | left = (leftmost | |
17551 | + grefx * (rightmost - leftmost) / 2 | |
17552 | - nrefx * width / 2); | |
17553 | btm = ((grefy == 0 ? highest | |
17554 | : grefy == 1 ? 0 | |
17555 | : grefy == 2 ? lowest | |
17556 | : (highest + lowest) / 2) | |
17557 | - (nrefy == 0 ? ascent + descent | |
17558 | : nrefy == 1 ? descent - boff | |
17559 | : nrefy == 2 ? 0 | |
17560 | : (ascent + descent) / 2)); | |
17561 | } | |
17562 | ||
17563 | cmp->offsets[i * 2] = left; | |
17564 | cmp->offsets[i * 2 + 1] = btm + descent; | |
17565 | ||
17566 | /* Update the bounding box of the overall glyphs. */ | |
17567 | right = left + width; | |
17568 | top = btm + descent + ascent; | |
17569 | if (left < leftmost) | |
17570 | leftmost = left; | |
17571 | if (right > rightmost) | |
17572 | rightmost = right; | |
17573 | if (top > highest) | |
17574 | highest = top; | |
17575 | if (btm < lowest) | |
17576 | lowest = btm; | |
17577 | } | |
17578 | ||
17579 | /* If there are glyphs whose x-offsets are negative, | |
17580 | shift all glyphs to the right and make all x-offsets | |
17581 | non-negative. */ | |
17582 | if (leftmost < 0) | |
17583 | { | |
17584 | for (i = 0; i < cmp->glyph_len; i++) | |
17585 | cmp->offsets[i * 2] -= leftmost; | |
17586 | rightmost -= leftmost; | |
17587 | } | |
17588 | ||
17589 | cmp->pixel_width = rightmost; | |
17590 | cmp->ascent = highest; | |
17591 | cmp->descent = - lowest; | |
17592 | if (cmp->ascent < font_ascent) | |
17593 | cmp->ascent = font_ascent; | |
17594 | if (cmp->descent < font_descent) | |
17595 | cmp->descent = font_descent; | |
17596 | } | |
17597 | ||
17598 | it->pixel_width = cmp->pixel_width; | |
17599 | it->ascent = it->phys_ascent = cmp->ascent; | |
17600 | it->descent = it->phys_descent = cmp->descent; | |
17601 | ||
17602 | if (face->box != FACE_NO_BOX) | |
17603 | { | |
17604 | int thick = face->box_line_width; | |
17605 | ||
17606 | if (thick > 0) | |
17607 | { | |
17608 | it->ascent += thick; | |
17609 | it->descent += thick; | |
17610 | } | |
17611 | else | |
17612 | thick = - thick; | |
17613 | ||
17614 | if (it->start_of_box_run_p) | |
17615 | it->pixel_width += thick; | |
17616 | if (it->end_of_box_run_p) | |
17617 | it->pixel_width += thick; | |
17618 | } | |
17619 | ||
17620 | /* If face has an overline, add the height of the overline | |
17621 | (1 pixel) and a 1 pixel margin to the character height. */ | |
17622 | if (face->overline_p) | |
17623 | it->ascent += 2; | |
17624 | ||
17625 | take_vertical_position_into_account (it); | |
17626 | ||
17627 | if (it->glyph_row) | |
17628 | append_composite_glyph (it); | |
17629 | } | |
17630 | else if (it->what == IT_IMAGE) | |
17631 | produce_image_glyph (it); | |
17632 | else if (it->what == IT_STRETCH) | |
17633 | produce_stretch_glyph (it); | |
17634 | ||
17635 | /* Accumulate dimensions. Note: can't assume that it->descent > 0 | |
17636 | because this isn't true for images with `:ascent 100'. */ | |
17637 | xassert (it->ascent >= 0 && it->descent >= 0); | |
17638 | if (it->area == TEXT_AREA) | |
17639 | it->current_x += it->pixel_width; | |
17640 | ||
17641 | it->descent += it->extra_line_spacing; | |
17642 | ||
17643 | it->max_ascent = max (it->max_ascent, it->ascent); | |
17644 | it->max_descent = max (it->max_descent, it->descent); | |
17645 | it->max_phys_ascent = max (it->max_phys_ascent, it->phys_ascent); | |
17646 | it->max_phys_descent = max (it->max_phys_descent, it->phys_descent); | |
17647 | } | |
17648 | ||
17649 | ||
17650 | ||
17651 | ||
17652 | ||
17653 | \f | |
cfe03a41 KS |
17654 | /*********************************************************************** |
17655 | Cursor types | |
17656 | ***********************************************************************/ | |
17657 | ||
17658 | /* Value is the internal representation of the specified cursor type | |
17659 | ARG. If type is BAR_CURSOR, return in *WIDTH the specified width | |
17660 | of the bar cursor. */ | |
17661 | ||
17662 | enum text_cursor_kinds | |
17663 | get_specified_cursor_type (arg, width) | |
17664 | Lisp_Object arg; | |
17665 | int *width; | |
17666 | { | |
17667 | enum text_cursor_kinds type; | |
7d0393cf | 17668 | |
cfe03a41 KS |
17669 | if (NILP (arg)) |
17670 | return NO_CURSOR; | |
17671 | ||
17672 | if (EQ (arg, Qbox)) | |
17673 | return FILLED_BOX_CURSOR; | |
17674 | ||
17675 | if (EQ (arg, Qhollow)) | |
17676 | return HOLLOW_BOX_CURSOR; | |
17677 | ||
17678 | if (EQ (arg, Qbar)) | |
17679 | { | |
17680 | *width = 2; | |
17681 | return BAR_CURSOR; | |
17682 | } | |
17683 | ||
17684 | if (CONSP (arg) | |
17685 | && EQ (XCAR (arg), Qbar) | |
17686 | && INTEGERP (XCDR (arg)) | |
17687 | && XINT (XCDR (arg)) >= 0) | |
17688 | { | |
17689 | *width = XINT (XCDR (arg)); | |
17690 | return BAR_CURSOR; | |
17691 | } | |
17692 | ||
17693 | if (EQ (arg, Qhbar)) | |
17694 | { | |
17695 | *width = 2; | |
17696 | return HBAR_CURSOR; | |
17697 | } | |
17698 | ||
17699 | if (CONSP (arg) | |
17700 | && EQ (XCAR (arg), Qhbar) | |
17701 | && INTEGERP (XCDR (arg)) | |
17702 | && XINT (XCDR (arg)) >= 0) | |
17703 | { | |
17704 | *width = XINT (XCDR (arg)); | |
17705 | return HBAR_CURSOR; | |
17706 | } | |
17707 | ||
17708 | /* Treat anything unknown as "hollow box cursor". | |
17709 | It was bad to signal an error; people have trouble fixing | |
17710 | .Xdefaults with Emacs, when it has something bad in it. */ | |
17711 | type = HOLLOW_BOX_CURSOR; | |
17712 | ||
17713 | return type; | |
17714 | } | |
17715 | ||
17716 | /* Set the default cursor types for specified frame. */ | |
17717 | void | |
17718 | set_frame_cursor_types (f, arg) | |
17719 | struct frame *f; | |
17720 | Lisp_Object arg; | |
17721 | { | |
17722 | int width; | |
17723 | Lisp_Object tem; | |
17724 | ||
17725 | FRAME_DESIRED_CURSOR (f) = get_specified_cursor_type (arg, &width); | |
17726 | FRAME_CURSOR_WIDTH (f) = width; | |
17727 | ||
17728 | /* By default, set up the blink-off state depending on the on-state. */ | |
17729 | ||
17730 | tem = Fassoc (arg, Vblink_cursor_alist); | |
17731 | if (!NILP (tem)) | |
17732 | { | |
17733 | FRAME_BLINK_OFF_CURSOR (f) | |
17734 | = get_specified_cursor_type (XCDR (tem), &width); | |
17735 | FRAME_BLINK_OFF_CURSOR_WIDTH (f) = width; | |
17736 | } | |
17737 | else | |
17738 | FRAME_BLINK_OFF_CURSOR (f) = DEFAULT_CURSOR; | |
17739 | } | |
17740 | ||
17741 | ||
e9c99027 KS |
17742 | /* Return the cursor we want to be displayed in window W. Return |
17743 | width of bar/hbar cursor through WIDTH arg. Return with | |
17744 | ACTIVE_CURSOR arg set to 1 if cursor in window W is `active' | |
17745 | (i.e. if the `system caret' should track this cursor). | |
17746 | ||
17747 | In a mini-buffer window, we want the cursor only to appear if we | |
17748 | are reading input from this window. For the selected window, we | |
17749 | want the cursor type given by the frame parameter or buffer local | |
17750 | setting of cursor-type. If explicitly marked off, draw no cursor. | |
17751 | In all other cases, we want a hollow box cursor. */ | |
cfe03a41 KS |
17752 | |
17753 | enum text_cursor_kinds | |
e9c99027 | 17754 | get_window_cursor_type (w, width, active_cursor) |
cfe03a41 KS |
17755 | struct window *w; |
17756 | int *width; | |
e9c99027 | 17757 | int *active_cursor; |
cfe03a41 KS |
17758 | { |
17759 | struct frame *f = XFRAME (w->frame); | |
17760 | struct buffer *b = XBUFFER (w->buffer); | |
17761 | int cursor_type = DEFAULT_CURSOR; | |
17762 | Lisp_Object alt_cursor; | |
17763 | int non_selected = 0; | |
17764 | ||
e9c99027 KS |
17765 | *active_cursor = 1; |
17766 | ||
cfe03a41 KS |
17767 | /* Echo area */ |
17768 | if (cursor_in_echo_area | |
17769 | && FRAME_HAS_MINIBUF_P (f) | |
17770 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
17771 | { | |
17772 | if (w == XWINDOW (echo_area_window)) | |
17773 | { | |
17774 | *width = FRAME_CURSOR_WIDTH (f); | |
17775 | return FRAME_DESIRED_CURSOR (f); | |
17776 | } | |
17777 | ||
e9c99027 | 17778 | *active_cursor = 0; |
cfe03a41 KS |
17779 | non_selected = 1; |
17780 | } | |
17781 | ||
17782 | /* Nonselected window or nonselected frame. */ | |
97acc803 EZ |
17783 | else if (w != XWINDOW (f->selected_window) |
17784 | #ifdef HAVE_WINDOW_SYSTEM | |
17785 | || f != FRAME_X_DISPLAY_INFO (f)->x_highlight_frame | |
17786 | #endif | |
17787 | ) | |
cfe03a41 | 17788 | { |
e9c99027 KS |
17789 | *active_cursor = 0; |
17790 | ||
cfe03a41 KS |
17791 | if (MINI_WINDOW_P (w) && minibuf_level == 0) |
17792 | return NO_CURSOR; | |
17793 | ||
17794 | non_selected = 1; | |
17795 | } | |
17796 | ||
17797 | /* Never display a cursor in a window in which cursor-type is nil. */ | |
17798 | if (NILP (b->cursor_type)) | |
17799 | return NO_CURSOR; | |
17800 | ||
17801 | /* Use cursor-in-non-selected-windows for non-selected window or frame. */ | |
17802 | if (non_selected) | |
17803 | { | |
17804 | alt_cursor = Fbuffer_local_value (Qcursor_in_non_selected_windows, w->buffer); | |
17805 | return get_specified_cursor_type (alt_cursor, width); | |
17806 | } | |
17807 | ||
17808 | /* Get the normal cursor type for this window. */ | |
17809 | if (EQ (b->cursor_type, Qt)) | |
17810 | { | |
17811 | cursor_type = FRAME_DESIRED_CURSOR (f); | |
17812 | *width = FRAME_CURSOR_WIDTH (f); | |
17813 | } | |
17814 | else | |
17815 | cursor_type = get_specified_cursor_type (b->cursor_type, width); | |
17816 | ||
17817 | /* Use normal cursor if not blinked off. */ | |
17818 | if (!w->cursor_off_p) | |
17819 | return cursor_type; | |
17820 | ||
17821 | /* Cursor is blinked off, so determine how to "toggle" it. */ | |
17822 | ||
8420a5dd KS |
17823 | /* First look for an entry matching the buffer's cursor-type in blink-cursor-alist. */ |
17824 | if ((alt_cursor = Fassoc (b->cursor_type, Vblink_cursor_alist), !NILP (alt_cursor))) | |
cfe03a41 KS |
17825 | return get_specified_cursor_type (XCDR (alt_cursor), width); |
17826 | ||
17827 | /* Then see if frame has specified a specific blink off cursor type. */ | |
17828 | if (FRAME_BLINK_OFF_CURSOR (f) != DEFAULT_CURSOR) | |
17829 | { | |
17830 | *width = FRAME_BLINK_OFF_CURSOR_WIDTH (f); | |
17831 | return FRAME_BLINK_OFF_CURSOR (f); | |
17832 | } | |
7d0393cf JB |
17833 | |
17834 | /* Finally perform built-in cursor blinking: | |
cfe03a41 KS |
17835 | filled box <-> hollow box |
17836 | wide [h]bar <-> narrow [h]bar | |
17837 | narrow [h]bar <-> no cursor | |
17838 | other type <-> no cursor */ | |
17839 | ||
17840 | if (cursor_type == FILLED_BOX_CURSOR) | |
17841 | return HOLLOW_BOX_CURSOR; | |
17842 | ||
17843 | if ((cursor_type == BAR_CURSOR || cursor_type == HBAR_CURSOR) && *width > 1) | |
17844 | { | |
17845 | *width = 1; | |
17846 | return cursor_type; | |
17847 | } | |
17848 | ||
17849 | return NO_CURSOR; | |
17850 | } | |
17851 | ||
133c764e KS |
17852 | |
17853 | /* Notice when the text cursor of window W has been completely | |
17854 | overwritten by a drawing operation that outputs glyphs in AREA | |
17855 | starting at X0 and ending at X1 in the line starting at Y0 and | |
17856 | ending at Y1. X coordinates are area-relative. X1 < 0 means all | |
17857 | the rest of the line after X0 has been written. Y coordinates | |
17858 | are window-relative. */ | |
17859 | ||
17860 | void | |
17861 | notice_overwritten_cursor (w, area, x0, x1, y0, y1) | |
17862 | struct window *w; | |
17863 | enum glyph_row_area area; | |
17864 | int x0, y0, x1, y1; | |
17865 | { | |
17866 | #ifdef HAVE_CARBON | |
17867 | /* ++KFS: Why is there a special version of this for the mac ? */ | |
17868 | if (area == TEXT_AREA | |
17869 | && w->phys_cursor_on_p | |
17870 | && y0 <= w->phys_cursor.y | |
17871 | && y1 >= w->phys_cursor.y + w->phys_cursor_height | |
17872 | && x0 <= w->phys_cursor.x | |
17873 | && (x1 < 0 || x1 > w->phys_cursor.x)) | |
17874 | w->phys_cursor_on_p = 0; | |
17875 | #else | |
17876 | if (area == TEXT_AREA && w->phys_cursor_on_p) | |
17877 | { | |
17878 | int cx0 = w->phys_cursor.x; | |
17879 | int cx1 = cx0 + w->phys_cursor_width; | |
17880 | int cy0 = w->phys_cursor.y; | |
17881 | int cy1 = cy0 + w->phys_cursor_height; | |
17882 | ||
17883 | if (x0 <= cx0 && (x1 < 0 || x1 >= cx1)) | |
17884 | { | |
17885 | /* The cursor image will be completely removed from the | |
17886 | screen if the output area intersects the cursor area in | |
17887 | y-direction. When we draw in [y0 y1[, and some part of | |
17888 | the cursor is at y < y0, that part must have been drawn | |
17889 | before. When scrolling, the cursor is erased before | |
17890 | actually scrolling, so we don't come here. When not | |
17891 | scrolling, the rows above the old cursor row must have | |
17892 | changed, and in this case these rows must have written | |
17893 | over the cursor image. | |
17894 | ||
17895 | Likewise if part of the cursor is below y1, with the | |
17896 | exception of the cursor being in the first blank row at | |
17897 | the buffer and window end because update_text_area | |
17898 | doesn't draw that row. (Except when it does, but | |
17899 | that's handled in update_text_area.) */ | |
17900 | ||
17901 | if (((y0 >= cy0 && y0 < cy1) || (y1 > cy0 && y1 < cy1)) | |
17902 | && w->current_matrix->rows[w->phys_cursor.vpos].displays_text_p) | |
17903 | w->phys_cursor_on_p = 0; | |
17904 | } | |
17905 | } | |
17906 | #endif | |
17907 | } | |
17908 | ||
cfe03a41 | 17909 | \f |
5f5c8ee5 GM |
17910 | /*********************************************************************** |
17911 | Initialization | |
17912 | ***********************************************************************/ | |
17913 | ||
a2889657 JB |
17914 | void |
17915 | syms_of_xdisp () | |
17916 | { | |
c6e89d6c GM |
17917 | Vwith_echo_area_save_vector = Qnil; |
17918 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 17919 | |
c6e89d6c GM |
17920 | Vmessage_stack = Qnil; |
17921 | staticpro (&Vmessage_stack); | |
2311178e | 17922 | |
735c094c | 17923 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 17924 | staticpro (&Qinhibit_redisplay); |
735c094c | 17925 | |
b14bc55e RS |
17926 | message_dolog_marker1 = Fmake_marker (); |
17927 | staticpro (&message_dolog_marker1); | |
17928 | message_dolog_marker2 = Fmake_marker (); | |
17929 | staticpro (&message_dolog_marker2); | |
17930 | message_dolog_marker3 = Fmake_marker (); | |
17931 | staticpro (&message_dolog_marker3); | |
17932 | ||
5f5c8ee5 | 17933 | #if GLYPH_DEBUG |
7d4cc828 | 17934 | defsubr (&Sdump_frame_glyph_matrix); |
5f5c8ee5 GM |
17935 | defsubr (&Sdump_glyph_matrix); |
17936 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 17937 | defsubr (&Sdump_tool_bar_row); |
62397849 | 17938 | defsubr (&Strace_redisplay); |
bf9249e3 | 17939 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 17940 | #endif |
99a5de87 | 17941 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 17942 | defsubr (&Stool_bar_lines_needed); |
99a5de87 | 17943 | #endif |
8143e6ab | 17944 | defsubr (&Sformat_mode_line); |
5f5c8ee5 | 17945 | |
cf074754 RS |
17946 | staticpro (&Qmenu_bar_update_hook); |
17947 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
17948 | ||
d46fb96a | 17949 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 17950 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 17951 | |
399164b4 KH |
17952 | staticpro (&Qoverriding_local_map); |
17953 | Qoverriding_local_map = intern ("overriding-local-map"); | |
17954 | ||
75c43375 RS |
17955 | staticpro (&Qwindow_scroll_functions); |
17956 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
17957 | ||
e0bfbde6 RS |
17958 | staticpro (&Qredisplay_end_trigger_functions); |
17959 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
2311178e | 17960 | |
2e54982e RS |
17961 | staticpro (&Qinhibit_point_motion_hooks); |
17962 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
17963 | ||
9499d71b GM |
17964 | QCdata = intern (":data"); |
17965 | staticpro (&QCdata); | |
5f5c8ee5 | 17966 | Qdisplay = intern ("display"); |
f3751a65 | 17967 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
17968 | Qspace_width = intern ("space-width"); |
17969 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
17970 | Qraise = intern ("raise"); |
17971 | staticpro (&Qraise); | |
17972 | Qspace = intern ("space"); | |
17973 | staticpro (&Qspace); | |
f3751a65 GM |
17974 | Qmargin = intern ("margin"); |
17975 | staticpro (&Qmargin); | |
5f5c8ee5 | 17976 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 17977 | staticpro (&Qleft_margin); |
5f5c8ee5 | 17978 | Qright_margin = intern ("right-margin"); |
f3751a65 | 17979 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
17980 | Qalign_to = intern ("align-to"); |
17981 | staticpro (&Qalign_to); | |
17982 | QCalign_to = intern (":align-to"); | |
17983 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
17984 | Qrelative_width = intern ("relative-width"); |
17985 | staticpro (&Qrelative_width); | |
17986 | QCrelative_width = intern (":relative-width"); | |
17987 | staticpro (&QCrelative_width); | |
17988 | QCrelative_height = intern (":relative-height"); | |
17989 | staticpro (&QCrelative_height); | |
17990 | QCeval = intern (":eval"); | |
17991 | staticpro (&QCeval); | |
0fcf414f RS |
17992 | QCpropertize = intern (":propertize"); |
17993 | staticpro (&QCpropertize); | |
886bd6f2 GM |
17994 | QCfile = intern (":file"); |
17995 | staticpro (&QCfile); | |
5f5c8ee5 GM |
17996 | Qfontified = intern ("fontified"); |
17997 | staticpro (&Qfontified); | |
17998 | Qfontification_functions = intern ("fontification-functions"); | |
17999 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
18000 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
18001 | staticpro (&Qtrailing_whitespace); | |
18002 | Qimage = intern ("image"); | |
18003 | staticpro (&Qimage); | |
ad4f174e GM |
18004 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
18005 | staticpro (&Qmessage_truncate_lines); | |
af79bccb RS |
18006 | Qcursor_in_non_selected_windows = intern ("cursor-in-non-selected-windows"); |
18007 | staticpro (&Qcursor_in_non_selected_windows); | |
6422c1d7 GM |
18008 | Qgrow_only = intern ("grow-only"); |
18009 | staticpro (&Qgrow_only); | |
e1477f43 GM |
18010 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
18011 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
18012 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
18013 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
18014 | Qposition = intern ("position"); |
18015 | staticpro (&Qposition); | |
18016 | Qbuffer_position = intern ("buffer-position"); | |
18017 | staticpro (&Qbuffer_position); | |
18018 | Qobject = intern ("object"); | |
18019 | staticpro (&Qobject); | |
cfe03a41 KS |
18020 | Qbar = intern ("bar"); |
18021 | staticpro (&Qbar); | |
18022 | Qhbar = intern ("hbar"); | |
18023 | staticpro (&Qhbar); | |
18024 | Qbox = intern ("box"); | |
18025 | staticpro (&Qbox); | |
18026 | Qhollow = intern ("hollow"); | |
18027 | staticpro (&Qhollow); | |
c53a1624 RS |
18028 | Qrisky_local_variable = intern ("risky-local-variable"); |
18029 | staticpro (&Qrisky_local_variable); | |
26683087 RS |
18030 | Qinhibit_free_realized_faces = intern ("inhibit-free-realized-faces"); |
18031 | staticpro (&Qinhibit_free_realized_faces); | |
5f5c8ee5 | 18032 | |
7033d6df RS |
18033 | list_of_error = Fcons (intern ("error"), Qnil); |
18034 | staticpro (&list_of_error); | |
18035 | ||
a2889657 JB |
18036 | last_arrow_position = Qnil; |
18037 | last_arrow_string = Qnil; | |
f3751a65 GM |
18038 | staticpro (&last_arrow_position); |
18039 | staticpro (&last_arrow_string); | |
2311178e | 18040 | |
c6e89d6c GM |
18041 | echo_buffer[0] = echo_buffer[1] = Qnil; |
18042 | staticpro (&echo_buffer[0]); | |
18043 | staticpro (&echo_buffer[1]); | |
18044 | ||
18045 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
18046 | staticpro (&echo_area_buffer[0]); | |
18047 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 18048 | |
6a94510a GM |
18049 | Vmessages_buffer_name = build_string ("*Messages*"); |
18050 | staticpro (&Vmessages_buffer_name); | |
0fcf414f RS |
18051 | |
18052 | mode_line_proptrans_alist = Qnil; | |
18053 | staticpro (&mode_line_proptrans_alist); | |
2311178e | 18054 | |
fec8f23e KS |
18055 | mode_line_string_list = Qnil; |
18056 | staticpro (&mode_line_string_list); | |
18057 | ||
7ee72033 MB |
18058 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
18059 | doc: /* Non-nil means highlight trailing whitespace. | |
228299fa | 18060 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
18061 | Vshow_trailing_whitespace = Qnil; |
18062 | ||
7ee72033 MB |
18063 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
18064 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 18065 | This is used for internal purposes. */); |
735c094c KH |
18066 | Vinhibit_redisplay = Qnil; |
18067 | ||
7ee72033 MB |
18068 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
18069 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
18070 | Vglobal_mode_string = Qnil; |
18071 | ||
7ee72033 MB |
18072 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
18073 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
18074 | This must be the beginning of a line in order to work. |
18075 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
18076 | Voverlay_arrow_position = Qnil; |
18077 | ||
7ee72033 MB |
18078 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
18079 | doc: /* String to display as an arrow. See also `overlay-arrow-position'. */); | |
a2889657 JB |
18080 | Voverlay_arrow_string = Qnil; |
18081 | ||
7ee72033 MB |
18082 | DEFVAR_INT ("scroll-step", &scroll_step, |
18083 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
18084 | If that fails to bring point back on frame, point is centered instead. |
18085 | If this is zero, point is always centered after it moves off frame. | |
18086 | If you want scrolling to always be a line at a time, you should set | |
18087 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
18088 | ||
7ee72033 MB |
18089 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
18090 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
18091 | A value of zero means to scroll the text to center point vertically |
18092 | in the window. */); | |
0789adb2 RS |
18093 | scroll_conservatively = 0; |
18094 | ||
7ee72033 MB |
18095 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
18096 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
18097 | Recenter the window whenever point gets within this many lines |
18098 | of the top or bottom of the window. */); | |
9afd2168 RS |
18099 | scroll_margin = 0; |
18100 | ||
5f5c8ee5 | 18101 | #if GLYPH_DEBUG |
7ee72033 | 18102 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 18103 | #endif |
a2889657 JB |
18104 | |
18105 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
18106 | &truncate_partial_width_windows, |
18107 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
18108 | truncate_partial_width_windows = 1; |
18109 | ||
7ee72033 MB |
18110 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
18111 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa | 18112 | Any other value means to use the appropriate face, `mode-line', |
ccfe8f57 | 18113 | `header-line', or `menu' respectively. */); |
1862a24e | 18114 | mode_line_inverse_video = 1; |
aa6d10fa | 18115 | |
7ee72033 MB |
18116 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
18117 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
18118 | If the buffer is bigger than this, the line number does not appear |
18119 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 18120 | Vline_number_display_limit = Qnil; |
fba9ce76 | 18121 | |
090703f4 | 18122 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
18123 | &line_number_display_limit_width, |
18124 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
18125 | If the average length of the lines near point is bigger than this, then the |
18126 | line number may be omitted from the mode line. */); | |
5d121aec KH |
18127 | line_number_display_limit_width = 200; |
18128 | ||
7ee72033 MB |
18129 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
18130 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 18131 | highlight_nonselected_windows = 0; |
d39b6696 | 18132 | |
7ee72033 MB |
18133 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
18134 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
18135 | Minibuffer-only frames don't count, but iconified frames do. |
18136 | This variable is not guaranteed to be accurate except while processing | |
18137 | `frame-title-format' and `icon-title-format'. */); | |
18138 | ||
7ee72033 MB |
18139 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
18140 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
18141 | \(Assuming the window manager supports this feature.) |
18142 | This variable has the same structure as `mode-line-format' (which see), | |
18143 | and is used only on frames for which no explicit name has been set | |
18144 | \(see `modify-frame-parameters'). */); | |
7ee72033 MB |
18145 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
18146 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
18147 | \(Assuming the window manager supports this feature.) |
18148 | This variable has the same structure as `mode-line-format' (which see), | |
18149 | and is used only on frames for which no explicit name has been set | |
18150 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
18151 | Vicon_title_format |
18152 | = Vframe_title_format | |
18153 | = Fcons (intern ("multiple-frames"), | |
18154 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 18155 | Fcons (Fcons (empty_string, |
d39b6696 KH |
18156 | Fcons (intern ("invocation-name"), |
18157 | Fcons (build_string ("@"), | |
18158 | Fcons (intern ("system-name"), | |
18159 | Qnil)))), | |
18160 | Qnil))); | |
5992c4f7 | 18161 | |
7ee72033 MB |
18162 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
18163 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
18164 | If nil, disable message logging. If t, log messages but don't truncate |
18165 | the buffer when it becomes large. */); | |
ac90c44f | 18166 | Vmessage_log_max = make_number (50); |
08b610e4 | 18167 | |
7ee72033 MB |
18168 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
18169 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
18170 | The value should be a list of functions that take one argument. |
18171 | Just before redisplay, for each frame, if any of its windows have changed | |
18172 | size since the last redisplay, or have been split or deleted, | |
18173 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 18174 | Vwindow_size_change_functions = Qnil; |
75c43375 | 18175 | |
7ee72033 MB |
18176 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
18177 | doc: /* List of Functions to call before redisplaying a window with scrolling. | |
228299fa GM |
18178 | Each function is called with two arguments, the window |
18179 | and its new display-start position. Note that the value of `window-end' | |
18180 | is not valid when these functions are called. */); | |
75c43375 | 18181 | Vwindow_scroll_functions = Qnil; |
2311178e | 18182 | |
7ee72033 MB |
18183 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
18184 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
18185 | This increases a tool-bar's height if not all tool-bar items are visible. |
18186 | It decreases a tool-bar's height when it would display blank lines | |
18187 | otherwise. */); | |
e037b9ec | 18188 | auto_resize_tool_bars_p = 1; |
2311178e | 18189 | |
7ee72033 MB |
18190 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
18191 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 18192 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 18193 | |
7ee72033 MB |
18194 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
18195 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa | 18196 | If an integer, use that for both horizontal and vertical margins. |
f6c89f27 | 18197 | Otherwise, value should be a pair of integers `(HORZ . VERT)' with |
228299fa GM |
18198 | HORZ specifying the horizontal margin, and VERT specifying the |
18199 | vertical margin. */); | |
c3d76173 | 18200 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 18201 | |
7ee72033 | 18202 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
6da3c85b | 18203 | doc: /* *Relief thickness of tool-bar buttons. */); |
c3d76173 | 18204 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 18205 | |
7ee72033 MB |
18206 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
18207 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
18208 | Each function is called with one argument POS. Functions must |
18209 | fontify a region starting at POS in the current buffer, and give | |
18210 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 18211 | Vfontification_functions = Qnil; |
6b9f0906 | 18212 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
18213 | |
18214 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
18215 | &unibyte_display_via_language_environment, |
18216 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
18217 | Specifically this means that unibyte non-ASCII characters |
18218 | are displayed by converting them to the equivalent multibyte characters | |
18219 | according to the current language environment. As a result, they are | |
18220 | displayed according to the current fontset. */); | |
7bbe686f | 18221 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 18222 | |
7ee72033 MB |
18223 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
18224 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
18225 | If a float, it specifies a fraction of the mini-window frame's height. |
18226 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 18227 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 18228 | |
7ee72033 MB |
18229 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
18230 | doc: /* *How to resize mini-windows. | |
228299fa GM |
18231 | A value of nil means don't automatically resize mini-windows. |
18232 | A value of t means resize them to fit the text displayed in them. | |
18233 | A value of `grow-only', the default, means let mini-windows grow | |
18234 | only, until their display becomes empty, at which point the windows | |
18235 | go back to their normal size. */); | |
6422c1d7 GM |
18236 | Vresize_mini_windows = Qgrow_only; |
18237 | ||
cfe03a41 KS |
18238 | DEFVAR_LISP ("cursor-in-non-selected-windows", |
18239 | &Vcursor_in_non_selected_windows, | |
18240 | doc: /* *Cursor type to display in non-selected windows. | |
18241 | t means to use hollow box cursor. See `cursor-type' for other values. */); | |
18242 | Vcursor_in_non_selected_windows = Qt; | |
18243 | ||
cfe03a41 KS |
18244 | DEFVAR_LISP ("blink-cursor-alist", &Vblink_cursor_alist, |
18245 | doc: /* Alist specifying how to blink the cursor off. | |
18246 | Each element has the form (ON-STATE . OFF-STATE). Whenever the | |
18247 | `cursor-type' frame-parameter or variable equals ON-STATE, | |
18248 | comparing using `equal', Emacs uses OFF-STATE to specify | |
18249 | how to blink it off. */); | |
18250 | Vblink_cursor_alist = Qnil; | |
2311178e | 18251 | |
e76d28d5 | 18252 | DEFVAR_BOOL ("auto-hscroll-mode", &automatic_hscrolling_p, |
7ee72033 | 18253 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); |
d475bcb8 | 18254 | automatic_hscrolling_p = 1; |
1df7e8f0 | 18255 | |
e76d28d5 | 18256 | DEFVAR_INT ("hscroll-margin", &hscroll_margin, |
1df7e8f0 EZ |
18257 | doc: /* *How many columns away from the window edge point is allowed to get |
18258 | before automatic hscrolling will horizontally scroll the window. */); | |
e76d28d5 | 18259 | hscroll_margin = 5; |
1df7e8f0 | 18260 | |
e76d28d5 | 18261 | DEFVAR_LISP ("hscroll-step", &Vhscroll_step, |
1df7e8f0 EZ |
18262 | doc: /* *How many columns to scroll the window when point gets too close to the edge. |
18263 | When point is less than `automatic-hscroll-margin' columns from the window | |
18264 | edge, automatic hscrolling will scroll the window by the amount of columns | |
18265 | determined by this variable. If its value is a positive integer, scroll that | |
18266 | many columns. If it's a positive floating-point number, it specifies the | |
18267 | fraction of the window's width to scroll. If it's nil or zero, point will be | |
18268 | centered horizontally after the scroll. Any other value, including negative | |
18269 | numbers, are treated as if the value were zero. | |
18270 | ||
18271 | Automatic hscrolling always moves point outside the scroll margin, so if | |
18272 | point was more than scroll step columns inside the margin, the window will | |
18273 | scroll more than the value given by the scroll step. | |
18274 | ||
18275 | Note that the lower bound for automatic hscrolling specified by `scroll-left' | |
18276 | and `scroll-right' overrides this variable's effect. */); | |
e76d28d5 | 18277 | Vhscroll_step = make_number (0); |
2311178e | 18278 | |
7ee72033 MB |
18279 | DEFVAR_LISP ("image-types", &Vimage_types, |
18280 | doc: /* List of supported image types. | |
228299fa | 18281 | Each element of the list is a symbol for a supported image type. */); |
e00daaa0 | 18282 | Vimage_types = Qnil; |
2311178e | 18283 | |
7ee72033 MB |
18284 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
18285 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 18286 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 18287 | message_truncate_lines = 0; |
0bca8940 | 18288 | |
7ee72033 MB |
18289 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
18290 | doc: /* Normal hook run for clicks on menu bar, before displaying a submenu. | |
228299fa | 18291 | Can be used to update submenus whose contents should vary. */); |
6422c1d7 | 18292 | Vmenu_bar_update_hook = Qnil; |
2311178e | 18293 | |
7ee72033 MB |
18294 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
18295 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 18296 | inhibit_menubar_update = 0; |
30a3f61c | 18297 | |
7ee72033 MB |
18298 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
18299 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 18300 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 18301 | |
26683087 RS |
18302 | DEFVAR_BOOL ("inhibit-free-realized-faces", &inhibit_free_realized_faces, |
18303 | doc: /* Non-nil means don't free realized faces. Internal use only. */); | |
18304 | inhibit_free_realized_faces = 0; | |
18305 | ||
69d1f7c9 | 18306 | #if GLYPH_DEBUG |
76cb5e06 GM |
18307 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
18308 | doc: /* Inhibit try_window_id display optimization. */); | |
18309 | inhibit_try_window_id = 0; | |
18310 | ||
18311 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
18312 | doc: /* Inhibit try_window_reusing display optimization. */); | |
18313 | inhibit_try_window_reusing = 0; | |
18314 | ||
18315 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
18316 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
18317 | inhibit_try_cursor_movement = 0; | |
18318 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
18319 | } |
18320 | ||
5f5c8ee5 GM |
18321 | |
18322 | /* Initialize this module when Emacs starts. */ | |
18323 | ||
dfcf069d | 18324 | void |
a2889657 JB |
18325 | init_xdisp () |
18326 | { | |
18327 | Lisp_Object root_window; | |
5f5c8ee5 | 18328 | struct window *mini_w; |
a2889657 | 18329 | |
04612a64 GM |
18330 | current_header_line_height = current_mode_line_height = -1; |
18331 | ||
5f5c8ee5 | 18332 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
18333 | |
18334 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 18335 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 18336 | |
a2889657 JB |
18337 | if (!noninteractive) |
18338 | { | |
5f5c8ee5 GM |
18339 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
18340 | int i; | |
18341 | ||
ac90c44f | 18342 | XWINDOW (root_window)->top = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 18343 | set_window_height (root_window, |
5f5c8ee5 | 18344 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 18345 | 0); |
ac90c44f | 18346 | mini_w->top = make_number (FRAME_HEIGHT (f) - 1); |
a2889657 JB |
18347 | set_window_height (minibuf_window, 1, 0); |
18348 | ||
ac90c44f GM |
18349 | XWINDOW (root_window)->width = make_number (FRAME_WIDTH (f)); |
18350 | mini_w->width = make_number (FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
18351 | |
18352 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
18353 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
18354 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
18355 | ||
2311178e | 18356 | /* The default ellipsis glyphs `...'. */ |
5f5c8ee5 | 18357 | for (i = 0; i < 3; ++i) |
ac90c44f | 18358 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 18359 | } |
5f5c8ee5 | 18360 | |
5f5c8ee5 | 18361 | { |
93da8435 SM |
18362 | /* Allocate the buffer for frame titles. |
18363 | Also used for `format-mode-line'. */ | |
5f5c8ee5 GM |
18364 | int size = 100; |
18365 | frame_title_buf = (char *) xmalloc (size); | |
18366 | frame_title_buf_end = frame_title_buf + size; | |
18367 | frame_title_ptr = NULL; | |
18368 | } | |
2311178e | 18369 | |
21fdfb65 | 18370 | help_echo_showing_p = 0; |
a2889657 | 18371 | } |
5f5c8ee5 GM |
18372 | |
18373 |