Commit | Line | Data |
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a2889657 | 1 | /* Display generation from window structure and buffer text. |
76412d64 | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94 Free Software Foundation, Inc. |
a2889657 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 8 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
18160b98 | 21 | #include <config.h> |
a2889657 JB |
22 | #include <stdio.h> |
23 | /*#include <ctype.h>*/ | |
24 | #undef NULL | |
25 | #include "lisp.h" | |
44fa5b1e | 26 | #include "frame.h" |
a2889657 JB |
27 | #include "window.h" |
28 | #include "termchar.h" | |
29 | #include "dispextern.h" | |
30 | #include "buffer.h" | |
31 | #include "indent.h" | |
32 | #include "commands.h" | |
33 | #include "macros.h" | |
34 | #include "disptab.h" | |
30c566e4 | 35 | #include "termhooks.h" |
b0a0fbda | 36 | #include "intervals.h" |
a2889657 | 37 | |
76412d64 RS |
38 | #ifdef USE_X_TOOLKIT |
39 | extern void set_frame_menubar (); | |
40 | #endif | |
41 | ||
a2889657 JB |
42 | extern int interrupt_input; |
43 | extern int command_loop_level; | |
44 | ||
45 | /* Nonzero means print newline before next minibuffer message. */ | |
46 | ||
47 | int noninteractive_need_newline; | |
48 | ||
49 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
50 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
51 | ||
52 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
53 | entirely or partially on the current frame line. |
54 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
55 | static int this_line_bufpos; |
56 | ||
57 | /* Number of characters past the end of this line, | |
58 | including the terminating newline */ | |
59 | static int this_line_endpos; | |
60 | ||
44fa5b1e | 61 | /* The vertical position of this frame line. */ |
a2889657 JB |
62 | static int this_line_vpos; |
63 | ||
44fa5b1e | 64 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
65 | Usually zero, but negative if first character really began |
66 | on previous line */ | |
67 | static int this_line_start_hpos; | |
68 | ||
69 | /* Buffer that this_line variables are describing. */ | |
70 | static struct buffer *this_line_buffer; | |
71 | ||
72 | /* Set by try_window_id to the vpos of first of any lines | |
44fa5b1e | 73 | scrolled on to the bottom of the frame. These lines should |
a2889657 JB |
74 | not be included in any general scroll computation. */ |
75 | static int scroll_bottom_vpos; | |
76 | ||
77 | /* Value of echo_area_glyphs when it was last acted on. | |
44fa5b1e | 78 | If this is nonzero, there is a message on the frame |
a2889657 JB |
79 | in the minibuffer and it should be erased as soon |
80 | as it is no longer requested to appear. */ | |
81 | char *previous_echo_glyphs; | |
82 | ||
44fa5b1e | 83 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
84 | int truncate_partial_width_windows; |
85 | ||
86 | Lisp_Object Vglobal_mode_string; | |
87 | ||
88 | /* Marker for where to display an arrow on top of the buffer text. */ | |
89 | Lisp_Object Voverlay_arrow_position; | |
90 | ||
91 | /* String to display for the arrow. */ | |
92 | Lisp_Object Voverlay_arrow_string; | |
93 | ||
94 | /* Values of those variables at last redisplay. */ | |
ded34426 | 95 | static Lisp_Object last_arrow_position, last_arrow_string; |
a2889657 JB |
96 | |
97 | /* Nonzero if overlay arrow has been displayed once in this window. */ | |
98 | static int overlay_arrow_seen; | |
99 | ||
fba9ce76 RS |
100 | /* Nonzero means highlight the region even in nonselected windows. */ |
101 | static int highlight_nonselected_windows; | |
102 | ||
44fa5b1e | 103 | /* If cursor motion alone moves point off frame, |
a2889657 JB |
104 | Try scrolling this many lines up or down if that will bring it back. */ |
105 | int scroll_step; | |
106 | ||
107 | /* Nonzero if try_window_id has made blank lines at window bottom | |
108 | since the last redisplay that paused */ | |
109 | static int blank_end_of_window; | |
110 | ||
111 | /* Number of windows showing the buffer of the selected window. | |
112 | keyboard.c refers to this. */ | |
113 | int buffer_shared; | |
114 | ||
44fa5b1e | 115 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
116 | whether the window is selected or not. |
117 | Set one to -1 first to determine whether point was found afterwards. */ | |
118 | ||
119 | static int cursor_vpos; | |
120 | static int cursor_hpos; | |
121 | ||
122 | int debug_end_pos; | |
123 | ||
124 | /* Nonzero means display mode line highlighted */ | |
125 | int mode_line_inverse_video; | |
126 | ||
127 | static void echo_area_display (); | |
128 | void mark_window_display_accurate (); | |
129 | static void redisplay_windows (); | |
130 | static void redisplay_window (); | |
90adcf20 RS |
131 | static void update_menu_bars (); |
132 | static void update_menu_bar (); | |
a2889657 JB |
133 | static void try_window (); |
134 | static int try_window_id (); | |
135 | static struct position *display_text_line (); | |
136 | static void display_mode_line (); | |
137 | static int display_mode_element (); | |
138 | static char *fmodetrunc (); | |
139 | static char *decode_mode_spec (); | |
140 | static int display_string (); | |
7ce2c095 | 141 | static void display_menu_bar (); |
aa6d10fa | 142 | static int display_count_lines (); |
a2889657 JB |
143 | |
144 | /* Prompt to display in front of the minibuffer contents */ | |
145 | char *minibuf_prompt; | |
146 | ||
147 | /* Width in columns of current minibuffer prompt. */ | |
148 | int minibuf_prompt_width; | |
149 | ||
150 | /* Message to display instead of minibuffer contents | |
151 | This is what the functions error and message make, | |
152 | and command echoing uses it as well. | |
153 | It overrides the minibuf_prompt as well as the buffer. */ | |
154 | char *echo_area_glyphs; | |
155 | ||
90adcf20 RS |
156 | /* This is the length of the message in echo_area_glyphs. */ |
157 | int echo_area_glyphs_length; | |
158 | ||
a2889657 JB |
159 | /* true iff we should redraw the mode lines on the next redisplay */ |
160 | int update_mode_lines; | |
161 | ||
162 | /* Smallest number of characters before the gap | |
163 | at any time since last redisplay that finished. | |
164 | Valid for current buffer when try_window_id can be called. */ | |
165 | int beg_unchanged; | |
166 | ||
167 | /* Smallest number of characters after the gap | |
168 | at any time since last redisplay that finished. | |
169 | Valid for current buffer when try_window_id can be called. */ | |
170 | int end_unchanged; | |
171 | ||
172 | /* MODIFF as of last redisplay that finished; | |
173 | if it matches MODIFF, beg_unchanged and end_unchanged | |
174 | contain no useful information */ | |
175 | int unchanged_modified; | |
176 | ||
177 | /* Nonzero if head_clip or tail_clip of current buffer has changed | |
178 | since last redisplay that finished */ | |
179 | int clip_changed; | |
180 | ||
181 | /* Nonzero if window sizes or contents have changed | |
182 | since last redisplay that finished */ | |
183 | int windows_or_buffers_changed; | |
184 | ||
aa6d10fa RS |
185 | /* Nonzero after display_mode_line if %l was used |
186 | and it displayed a line number. */ | |
187 | int line_number_displayed; | |
188 | ||
189 | /* Maximum buffer size for which to display line numbers. */ | |
190 | int line_number_display_limit; | |
a2889657 | 191 | \f |
90adcf20 | 192 | /* Display an echo area message M with a specified length of LEN chars. |
48ae5f0a KH |
193 | The string may include null characters. If m is 0, clear out any |
194 | existing message, and let the minibuffer text show through. | |
195 | Do not pass text that is stored in a Lisp string. */ | |
90adcf20 RS |
196 | |
197 | void | |
198 | message2 (m, len) | |
199 | char *m; | |
200 | int len; | |
201 | { | |
202 | if (noninteractive) | |
203 | { | |
204 | if (noninteractive_need_newline) | |
205 | putc ('\n', stderr); | |
206 | noninteractive_need_newline = 0; | |
207 | fwrite (m, len, 1, stderr); | |
208 | if (cursor_in_echo_area == 0) | |
209 | fprintf (stderr, "\n"); | |
210 | fflush (stderr); | |
211 | } | |
212 | /* A null message buffer means that the frame hasn't really been | |
213 | initialized yet. Error messages get reported properly by | |
214 | cmd_error, so this must be just an informative message; toss it. */ | |
215 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
216 | { | |
217 | #ifdef MULTI_FRAME | |
218 | Lisp_Object minibuf_frame; | |
219 | ||
220 | choose_minibuf_frame (); | |
221 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); | |
222 | FRAME_SAMPLE_VISIBILITY (XFRAME (minibuf_frame)); | |
223 | if (FRAME_VISIBLE_P (selected_frame) | |
224 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
225 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
226 | #endif | |
227 | ||
228 | if (m) | |
229 | { | |
230 | echo_area_glyphs = m; | |
231 | echo_area_glyphs_length = len; | |
232 | } | |
ded34426 JB |
233 | else |
234 | echo_area_glyphs = previous_echo_glyphs = 0; | |
235 | ||
236 | do_pending_window_change (); | |
237 | echo_area_display (); | |
238 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); | |
239 | do_pending_window_change (); | |
240 | } | |
241 | } | |
242 | ||
48ae5f0a KH |
243 | void |
244 | message1 (m) | |
245 | char *m; | |
246 | { | |
247 | message2 (m, (m ? strlen (m) : 0)); | |
248 | } | |
249 | ||
76412d64 RS |
250 | /* Truncate what will be displayed in the echo area |
251 | the next time we display it--but don't redisplay it now. */ | |
252 | ||
253 | void | |
254 | truncate_echo_area (len) | |
255 | int len; | |
256 | { | |
257 | /* A null message buffer means that the frame hasn't really been | |
258 | initialized yet. Error messages get reported properly by | |
259 | cmd_error, so this must be just an informative message; toss it. */ | |
260 | if (!noninteractive && INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
261 | echo_area_glyphs_length = len; | |
262 | } | |
263 | ||
44fa5b1e | 264 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
265 | zero if being used by message. */ |
266 | int message_buf_print; | |
267 | ||
81d478f3 JB |
268 | /* Dump an informative message to the minibuf. If m is 0, clear out |
269 | any existing message, and let the minibuffer text show through. */ | |
a2889657 | 270 | /* VARARGS 1 */ |
a2889657 JB |
271 | void |
272 | message (m, a1, a2, a3) | |
273 | char *m; | |
274 | { | |
275 | if (noninteractive) | |
276 | { | |
81d478f3 JB |
277 | if (m) |
278 | { | |
279 | if (noninteractive_need_newline) | |
280 | putc ('\n', stderr); | |
281 | noninteractive_need_newline = 0; | |
282 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
283 | if (cursor_in_echo_area == 0) |
284 | fprintf (stderr, "\n"); | |
81d478f3 JB |
285 | fflush (stderr); |
286 | } | |
a2889657 | 287 | } |
1f40cad2 | 288 | else if (INTERACTIVE) |
a2889657 | 289 | { |
1f40cad2 JB |
290 | /* The frame whose minibuffer we're going to display the message on. |
291 | It may be larger than the selected frame, so we need | |
292 | to use its buffer, not the selected frame's buffer. */ | |
293 | FRAME_PTR echo_frame; | |
294 | #ifdef MULTI_FRAME | |
295 | choose_minibuf_frame (); | |
296 | echo_frame = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
297 | #else | |
298 | echo_frame = selected_frame; | |
299 | #endif | |
300 | ||
301 | /* A null message buffer means that the frame hasn't really been | |
302 | initialized yet. Error messages get reported properly by | |
303 | cmd_error, so this must be just an informative message; toss it. */ | |
304 | if (FRAME_MESSAGE_BUF (echo_frame)) | |
81d478f3 | 305 | { |
1f40cad2 JB |
306 | if (m) |
307 | { | |
90adcf20 | 308 | int len; |
a2889657 | 309 | #ifdef NO_ARG_ARRAY |
90adcf20 RS |
310 | int a[3]; |
311 | a[0] = a1; | |
312 | a[1] = a2; | |
313 | a[2] = a3; | |
a2889657 | 314 | |
90adcf20 RS |
315 | len = doprnt (FRAME_MESSAGE_BUF (echo_frame), |
316 | FRAME_WIDTH (echo_frame), m, 0, 3, a); | |
a2889657 | 317 | #else |
90adcf20 RS |
318 | len = doprnt (FRAME_MESSAGE_BUF (echo_frame), |
319 | FRAME_WIDTH (echo_frame), m, 0, 3, &a1); | |
1f40cad2 | 320 | #endif /* NO_ARG_ARRAY */ |
1f40cad2 | 321 | |
90adcf20 | 322 | message2 (FRAME_MESSAGE_BUF (echo_frame), len); |
1f40cad2 JB |
323 | } |
324 | else | |
325 | message1 (0); | |
326 | ||
327 | /* Print should start at the beginning of the message | |
328 | buffer next time. */ | |
329 | message_buf_print = 0; | |
81d478f3 | 330 | } |
a2889657 JB |
331 | } |
332 | } | |
333 | ||
334 | static void | |
335 | echo_area_display () | |
336 | { | |
337 | register int vpos; | |
44fa5b1e | 338 | FRAME_PTR f; |
a2889657 | 339 | |
44fa5b1e JB |
340 | #ifdef MULTI_FRAME |
341 | choose_minibuf_frame (); | |
b1d1124b JB |
342 | #endif |
343 | ||
44fa5b1e | 344 | f = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); |
a2889657 | 345 | |
44fa5b1e | 346 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 347 | return; |
a2889657 | 348 | |
44fa5b1e | 349 | if (frame_garbaged) |
a2889657 | 350 | { |
02a9b6e4 | 351 | redraw_garbaged_frames (); |
44fa5b1e | 352 | frame_garbaged = 0; |
a2889657 JB |
353 | } |
354 | ||
355 | if (echo_area_glyphs || minibuf_level == 0) | |
356 | { | |
357 | vpos = XFASTINT (XWINDOW (minibuf_window)->top); | |
44fa5b1e | 358 | get_display_line (f, vpos, 0); |
a2889657 JB |
359 | display_string (XWINDOW (minibuf_window), vpos, |
360 | echo_area_glyphs ? echo_area_glyphs : "", | |
90adcf20 | 361 | echo_area_glyphs ? echo_area_glyphs_length : -1, |
278feba9 | 362 | 0, 0, 0, 0, FRAME_WIDTH (f)); |
a2889657 JB |
363 | |
364 | /* If desired cursor location is on this line, put it at end of text */ | |
44fa5b1e JB |
365 | if (FRAME_CURSOR_Y (f) == vpos) |
366 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
daa37602 JB |
367 | |
368 | /* Fill the rest of the minibuffer window with blank lines. */ | |
369 | { | |
370 | int i; | |
371 | ||
b2a76982 RS |
372 | for (i = vpos + 1; |
373 | i < vpos + XFASTINT (XWINDOW (minibuf_window)->height); i++) | |
daa37602 | 374 | { |
44fa5b1e | 375 | get_display_line (f, i, 0); |
daa37602 | 376 | display_string (XWINDOW (minibuf_window), vpos, |
278feba9 | 377 | "", 0, 0, 0, 0, 0, FRAME_WIDTH (f)); |
daa37602 JB |
378 | } |
379 | } | |
a2889657 JB |
380 | } |
381 | else if (!EQ (minibuf_window, selected_window)) | |
382 | windows_or_buffers_changed++; | |
383 | ||
384 | if (EQ (minibuf_window, selected_window)) | |
385 | this_line_bufpos = 0; | |
386 | ||
387 | previous_echo_glyphs = echo_area_glyphs; | |
388 | } | |
96a410bc KH |
389 | |
390 | #ifdef HAVE_X_WINDOWS | |
391 | /* I'm trying this out because I saw Unimpress use it, but it's | |
392 | possible that this may mess adversely with some window managers. -jla | |
393 | ||
394 | Wouldn't it be nice to use something like mode-line-format to | |
395 | describe frame titles? -JimB */ | |
396 | ||
397 | /* Change the title of the frame to the name of the buffer displayed | |
398 | in the currently selected window. Don't do this for minibuffer frames, | |
399 | and don't do it when there's only one non-minibuffer frame. */ | |
400 | static void | |
401 | x_consider_frame_title (frame) | |
402 | Lisp_Object frame; | |
403 | { | |
404 | FRAME_PTR f = XFRAME (frame); | |
405 | ||
406 | if (FRAME_X_P (f) && ! FRAME_MINIBUF_ONLY_P (f)) | |
407 | { | |
0b67772d | 408 | Lisp_Object title; |
96a410bc | 409 | |
0b67772d | 410 | title = Qnil; |
96a410bc KH |
411 | if (! EQ (Fnext_frame (frame, Qnil), frame)) |
412 | title = XBUFFER (XWINDOW (f->selected_window)->buffer)->name; | |
413 | ||
414 | x_implicitly_set_name (f, title, Qnil); | |
415 | } | |
416 | } | |
417 | #endif | |
a2889657 | 418 | \f |
90adcf20 RS |
419 | /* Prepare for redisplay by updating menu-bar item lists when appropriate. |
420 | This can't be done in `redisplay' itself because it can call eval. */ | |
421 | ||
422 | void | |
423 | prepare_menu_bars () | |
424 | { | |
425 | register struct window *w = XWINDOW (selected_window); | |
426 | int all_windows; | |
427 | ||
428 | if (noninteractive) | |
429 | return; | |
430 | ||
431 | /* Set the visible flags for all frames. | |
432 | Do this before checking for resized or garbaged frames; they want | |
433 | to know if their frames are visible. | |
434 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
435 | { | |
436 | Lisp_Object tail, frame; | |
437 | ||
438 | FOR_EACH_FRAME (tail, frame) | |
439 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
440 | } | |
441 | ||
442 | /* Notice any pending interrupt request to change frame size. */ | |
443 | do_pending_window_change (); | |
444 | ||
445 | if (frame_garbaged) | |
446 | { | |
447 | redraw_garbaged_frames (); | |
448 | frame_garbaged = 0; | |
449 | } | |
450 | ||
451 | if (clip_changed || windows_or_buffers_changed) | |
452 | update_mode_lines++; | |
453 | ||
454 | /* Detect case that we need to write a star in the mode line. */ | |
455 | if (XFASTINT (w->last_modified) < MODIFF | |
456 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
457 | { | |
458 | w->update_mode_line = Qt; | |
459 | if (buffer_shared > 1) | |
460 | update_mode_lines++; | |
461 | } | |
462 | ||
463 | all_windows = update_mode_lines || buffer_shared > 1; | |
464 | ||
465 | /* If specs for an arrow have changed, do thorough redisplay | |
466 | to ensure we remove any arrow that should no longer exist. */ | |
467 | if (! EQ (Voverlay_arrow_position, last_arrow_position) | |
468 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
469 | all_windows = 1, clip_changed = 1; | |
470 | ||
471 | /* Update the menu bar item lists, if appropriate. | |
472 | This has to be done before any actual redisplay | |
473 | or generation of display lines. */ | |
474 | if (all_windows) | |
475 | { | |
476 | Lisp_Object tail, frame; | |
477 | ||
478 | FOR_EACH_FRAME (tail, frame) | |
479 | { | |
480 | FRAME_PTR f = XFRAME (frame); | |
481 | ||
482 | if (FRAME_VISIBLE_P (f)) | |
483 | update_menu_bars (FRAME_ROOT_WINDOW (f)); | |
484 | } | |
485 | } | |
486 | else if (FRAME_VISIBLE_P (selected_frame)) | |
487 | update_menu_bar (selected_window); | |
488 | } | |
489 | \f | |
44fa5b1e | 490 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
491 | This is the main external entry point for redisplay. |
492 | ||
493 | If the last redisplay displayed an echo area message and that | |
494 | message is no longer requested, we clear the echo area | |
495 | or bring back the minibuffer if that is in use. | |
496 | ||
90adcf20 RS |
497 | Do not call eval from within this function. |
498 | Calls to eval after the call to echo_area_display would confuse | |
499 | the display_line mechanism and would cause a crash. | |
500 | Calls to eval before that point will work most of the time, | |
501 | but can still lose, because this function | |
502 | can be called from signal handlers; with alarms set up; | |
a2889657 | 503 | or with synchronous processes running. |
90adcf20 | 504 | |
a2889657 JB |
505 | See Fcall_process; if you called it from here, it could be |
506 | entered recursively. */ | |
507 | ||
508 | void | |
509 | redisplay () | |
510 | { | |
511 | register struct window *w = XWINDOW (selected_window); | |
512 | register int pause; | |
513 | int must_finish = 0; | |
514 | int all_windows; | |
515 | register int tlbufpos, tlendpos; | |
516 | struct position pos; | |
517 | extern int input_pending; | |
518 | ||
519 | if (noninteractive) | |
520 | return; | |
521 | ||
d724d989 JB |
522 | /* Set the visible flags for all frames. |
523 | Do this before checking for resized or garbaged frames; they want | |
524 | to know if their frames are visible. | |
525 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
526 | { | |
35f56f96 | 527 | Lisp_Object tail, frame; |
d724d989 | 528 | |
35f56f96 JB |
529 | FOR_EACH_FRAME (tail, frame) |
530 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
d724d989 JB |
531 | } |
532 | ||
44fa5b1e | 533 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
534 | do_pending_window_change (); |
535 | ||
44fa5b1e | 536 | if (frame_garbaged) |
a2889657 | 537 | { |
02a9b6e4 | 538 | redraw_garbaged_frames (); |
44fa5b1e | 539 | frame_garbaged = 0; |
a2889657 JB |
540 | } |
541 | ||
a2889657 JB |
542 | if (clip_changed || windows_or_buffers_changed) |
543 | update_mode_lines++; | |
544 | ||
545 | /* Detect case that we need to write a star in the mode line. */ | |
546 | if (XFASTINT (w->last_modified) < MODIFF | |
547 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
548 | { | |
549 | w->update_mode_line = Qt; | |
550 | if (buffer_shared > 1) | |
551 | update_mode_lines++; | |
552 | } | |
553 | ||
44fa5b1e | 554 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
555 | |
556 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
557 | |
558 | /* If specs for an arrow have changed, do thorough redisplay | |
559 | to ensure we remove any arrow that should no longer exist. */ | |
ded34426 JB |
560 | if (! EQ (Voverlay_arrow_position, last_arrow_position) |
561 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
a2889657 JB |
562 | all_windows = 1, clip_changed = 1; |
563 | ||
90adcf20 RS |
564 | /* Normally the message* functions will have already displayed and |
565 | updated the echo area, but the frame may have been trashed, or | |
566 | the update may have been preempted, so display the echo area | |
567 | again here. */ | |
568 | if (echo_area_glyphs || previous_echo_glyphs) | |
569 | { | |
570 | echo_area_display (); | |
571 | must_finish = 1; | |
572 | } | |
573 | ||
bd66d1ba RS |
574 | /* If showing region, and mark has changed, must redisplay whole window. */ |
575 | if (((!NILP (Vtransient_mark_mode) | |
576 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
577 | != !NILP (w->region_showing)) | |
82d04750 JB |
578 | || (!NILP (w->region_showing) |
579 | && !EQ (w->region_showing, | |
580 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
bd66d1ba RS |
581 | this_line_bufpos = -1; |
582 | ||
a2889657 JB |
583 | tlbufpos = this_line_bufpos; |
584 | tlendpos = this_line_endpos; | |
265a9e55 | 585 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
44fa5b1e | 586 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
a2889657 JB |
587 | /* Make sure recorded data applies to current buffer, etc */ |
588 | && this_line_buffer == current_buffer | |
589 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 590 | && NILP (w->force_start) |
a2889657 JB |
591 | /* Point must be on the line that we have info recorded about */ |
592 | && point >= tlbufpos | |
593 | && point <= Z - tlendpos | |
594 | /* All text outside that line, including its final newline, | |
595 | must be unchanged */ | |
596 | && (XFASTINT (w->last_modified) >= MODIFF | |
597 | || (beg_unchanged >= tlbufpos - 1 | |
598 | && GPT >= tlbufpos | |
05ba02eb JB |
599 | /* If selective display, can't optimize |
600 | if the changes start at the beginning of the line. */ | |
601 | && ((XTYPE (current_buffer->selective_display) == Lisp_Int | |
602 | && XINT (current_buffer->selective_display) > 0 | |
603 | ? (beg_unchanged >= tlbufpos | |
604 | && GPT > tlbufpos) | |
605 | : 1)) | |
a2889657 JB |
606 | && end_unchanged >= tlendpos |
607 | && Z - GPT >= tlendpos))) | |
608 | { | |
609 | if (tlbufpos > BEGV && FETCH_CHAR (tlbufpos - 1) != '\n' | |
610 | && (tlbufpos == ZV | |
611 | || FETCH_CHAR (tlbufpos) == '\n')) | |
612 | /* Former continuation line has disappeared by becoming empty */ | |
613 | goto cancel; | |
614 | else if (XFASTINT (w->last_modified) < MODIFF | |
615 | || MINI_WINDOW_P (w)) | |
616 | { | |
617 | cursor_vpos = -1; | |
618 | overlay_arrow_seen = 0; | |
619 | display_text_line (w, tlbufpos, this_line_vpos, this_line_start_hpos, | |
620 | pos_tab_offset (w, tlbufpos)); | |
621 | /* If line contains point, is not continued, | |
622 | and ends at same distance from eob as before, we win */ | |
623 | if (cursor_vpos >= 0 && this_line_bufpos | |
624 | && this_line_endpos == tlendpos) | |
625 | { | |
46db8486 RS |
626 | int left = XFASTINT (w->left); |
627 | int *charstart_next_line | |
628 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[this_line_vpos + 1]; | |
46db8486 | 629 | int i; |
ffd57920 RS |
630 | int adjust; |
631 | ||
632 | if (Z - tlendpos == ZV) | |
633 | /* This line ends at end of (accessible part of) buffer. | |
634 | There is no newline to count. */ | |
635 | adjust = Z - tlendpos - charstart_next_line[left]; | |
636 | else | |
637 | /* This line ends in a newline. | |
638 | Must take account of the newline and the rest of the | |
639 | text that follows. */ | |
640 | adjust = Z - tlendpos + 1 - charstart_next_line[left]; | |
46db8486 RS |
641 | |
642 | adjust_window_charstarts (w, this_line_vpos, adjust); | |
643 | ||
44fa5b1e | 644 | if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
645 | preserve_other_columns (w); |
646 | goto update; | |
647 | } | |
648 | else | |
649 | goto cancel; | |
650 | } | |
651 | else if (point == XFASTINT (w->last_point)) | |
652 | { | |
653 | if (!must_finish) | |
654 | { | |
655 | do_pending_window_change (); | |
656 | return; | |
657 | } | |
658 | goto update; | |
659 | } | |
bd66d1ba RS |
660 | /* If highlighting the region, we can't just move the cursor. */ |
661 | else if (! (!NILP (Vtransient_mark_mode) | |
662 | && !NILP (current_buffer->mark_active)) | |
663 | && NILP (w->region_showing)) | |
a2889657 JB |
664 | { |
665 | pos = *compute_motion (tlbufpos, 0, | |
666 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
667 | point, 2, - (1 << (SHORTBITS - 1)), | |
b1d1124b | 668 | window_internal_width (w) - 1, |
de3e8b15 JB |
669 | XINT (w->hscroll), |
670 | pos_tab_offset (w, tlbufpos)); | |
a2889657 JB |
671 | if (pos.vpos < 1) |
672 | { | |
44fa5b1e | 673 | FRAME_CURSOR_X (selected_frame) |
a2889657 | 674 | = XFASTINT (w->left) + max (pos.hpos, 0); |
44fa5b1e | 675 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
676 | goto update; |
677 | } | |
678 | else | |
679 | goto cancel; | |
680 | } | |
681 | cancel: | |
682 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 683 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
684 | } |
685 | ||
686 | this_line_bufpos = 0; | |
687 | all_windows |= buffer_shared > 1; | |
688 | ||
689 | if (all_windows) | |
690 | { | |
35f56f96 | 691 | Lisp_Object tail, frame; |
a2889657 | 692 | |
31b24551 JB |
693 | #ifdef HAVE_X_WINDOWS |
694 | /* Since we're doing a thorough redisplay, we might as well | |
695 | recompute all our display faces. */ | |
696 | clear_face_vector (); | |
697 | #endif | |
698 | ||
a2889657 | 699 | /* Recompute # windows showing selected buffer. |
8de2d90b | 700 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
701 | buffer_shared = 0; |
702 | ||
35f56f96 | 703 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 704 | { |
35f56f96 JB |
705 | FRAME_PTR f = XFRAME (frame); |
706 | ||
88f22aff | 707 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
30c566e4 | 708 | we want when we redisplay their windows. */ |
88f22aff JB |
709 | if (condemn_scroll_bars_hook) |
710 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 JB |
711 | |
712 | if (FRAME_VISIBLE_P (f)) | |
713 | redisplay_windows (FRAME_ROOT_WINDOW (f)); | |
96a410bc | 714 | #ifdef HAVE_X_WINDOWS |
98bc00f0 KH |
715 | else if (FRAME_ICONIFIED_P (f) |
716 | && ! MINI_WINDOW_P (XWINDOW (f->selected_window))) | |
96a410bc KH |
717 | x_consider_frame_title (frame); |
718 | #endif | |
30c566e4 | 719 | |
88f22aff | 720 | /* Any scroll bars which redisplay_windows should have nuked |
30c566e4 | 721 | should now go away. */ |
88f22aff JB |
722 | if (judge_scroll_bars_hook) |
723 | (*judge_scroll_bars_hook) (f); | |
30c566e4 | 724 | } |
a2889657 | 725 | } |
44fa5b1e | 726 | else if (FRAME_VISIBLE_P (selected_frame)) |
a2889657 JB |
727 | { |
728 | redisplay_window (selected_window, 1); | |
44fa5b1e | 729 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
730 | preserve_other_columns (w); |
731 | } | |
732 | ||
733 | update: | |
734 | /* Prevent various kinds of signals during display update. | |
735 | stdio is not robust about handling signals, | |
736 | which can cause an apparent I/O error. */ | |
737 | if (interrupt_input) | |
738 | unrequest_sigio (); | |
739 | stop_polling (); | |
740 | ||
44fa5b1e | 741 | #ifdef MULTI_FRAME |
a2889657 JB |
742 | if (all_windows) |
743 | { | |
744 | Lisp_Object tail; | |
745 | ||
746 | pause = 0; | |
747 | ||
44fa5b1e | 748 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 749 | { |
44fa5b1e | 750 | FRAME_PTR f; |
a2889657 | 751 | |
44fa5b1e | 752 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
753 | continue; |
754 | ||
44fa5b1e | 755 | f = XFRAME (XCONS (tail)->car); |
30c566e4 | 756 | if (FRAME_VISIBLE_P (f)) |
a2889657 | 757 | { |
44fa5b1e | 758 | pause |= update_frame (f, 0, 0); |
a2889657 | 759 | if (!pause) |
efc63ef0 RS |
760 | { |
761 | mark_window_display_accurate (f->root_window, 1); | |
762 | if (frame_up_to_date_hook != 0) | |
763 | (*frame_up_to_date_hook) (f); | |
764 | } | |
a2889657 JB |
765 | } |
766 | } | |
767 | } | |
768 | else | |
44fa5b1e | 769 | #endif /* MULTI_FRAME */ |
6e8290aa | 770 | { |
44fa5b1e JB |
771 | if (FRAME_VISIBLE_P (selected_frame)) |
772 | pause = update_frame (selected_frame, 0, 0); | |
d724d989 | 773 | |
8de2d90b | 774 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
775 | function. If the echo area is on another frame, that may |
776 | have put text on a frame other than the selected one, so the | |
777 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
778 | it here. */ |
779 | { | |
efc63ef0 RS |
780 | FRAME_PTR mini_frame |
781 | = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b | 782 | |
44fa5b1e JB |
783 | if (mini_frame != selected_frame) |
784 | pause |= update_frame (mini_frame, 0, 0); | |
8de2d90b | 785 | } |
6e8290aa | 786 | } |
a2889657 | 787 | |
44fa5b1e | 788 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
789 | Also, don't forget to check every line to update the arrow. */ |
790 | if (pause) | |
791 | { | |
792 | this_line_bufpos = 0; | |
265a9e55 | 793 | if (!NILP (last_arrow_position)) |
a2889657 JB |
794 | { |
795 | last_arrow_position = Qt; | |
796 | last_arrow_string = Qt; | |
797 | } | |
44fa5b1e | 798 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
799 | may be null, so preserve_other_columns won't be able to |
800 | preserve all the vertical-bar separators. So, avoid using it | |
801 | in that case. */ | |
44fa5b1e | 802 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
803 | update_mode_lines = 1; |
804 | } | |
805 | ||
44fa5b1e | 806 | /* Now text on frame agrees with windows, so |
a2889657 JB |
807 | put info into the windows for partial redisplay to follow */ |
808 | ||
809 | if (!pause) | |
810 | { | |
811 | register struct buffer *b = XBUFFER (w->buffer); | |
812 | ||
813 | blank_end_of_window = 0; | |
814 | clip_changed = 0; | |
815 | unchanged_modified = BUF_MODIFF (b); | |
816 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); | |
817 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
818 | ||
819 | XFASTINT (w->last_point) = BUF_PT (b); | |
44fa5b1e JB |
820 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (selected_frame); |
821 | XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame); | |
a2889657 JB |
822 | |
823 | if (all_windows) | |
11e82b76 | 824 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
825 | else |
826 | { | |
827 | w->update_mode_line = Qnil; | |
828 | XFASTINT (w->last_modified) = BUF_MODIFF (b); | |
829 | w->window_end_valid = Qt; | |
830 | last_arrow_position = Voverlay_arrow_position; | |
831 | last_arrow_string = Voverlay_arrow_string; | |
efc63ef0 RS |
832 | if (frame_up_to_date_hook != 0) |
833 | (*frame_up_to_date_hook) (selected_frame); | |
a2889657 JB |
834 | } |
835 | update_mode_lines = 0; | |
836 | windows_or_buffers_changed = 0; | |
837 | } | |
838 | ||
839 | /* Start SIGIO interrupts coming again. | |
840 | Having them off during the code above | |
841 | makes it less likely one will discard output, | |
842 | but not impossible, since there might be stuff | |
843 | in the system buffer here. | |
844 | But it is much hairier to try to do anything about that. */ | |
845 | ||
846 | if (interrupt_input) | |
847 | request_sigio (); | |
848 | start_polling (); | |
849 | ||
44fa5b1e | 850 | /* Change frame size now if a change is pending. */ |
a2889657 JB |
851 | do_pending_window_change (); |
852 | } | |
853 | ||
854 | /* Redisplay, but leave alone any recent echo area message | |
855 | unless another message has been requested in its place. | |
856 | ||
857 | This is useful in situations where you need to redisplay but no | |
858 | user action has occurred, making it inappropriate for the message | |
859 | area to be cleared. See tracking_off and | |
860 | wait_reading_process_input for examples of these situations. */ | |
861 | ||
862 | redisplay_preserve_echo_area () | |
863 | { | |
864 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
865 | { | |
866 | echo_area_glyphs = previous_echo_glyphs; | |
867 | redisplay (); | |
868 | echo_area_glyphs = 0; | |
869 | } | |
870 | else | |
871 | redisplay (); | |
872 | } | |
873 | ||
874 | void | |
875 | mark_window_display_accurate (window, flag) | |
876 | Lisp_Object window; | |
877 | int flag; | |
878 | { | |
879 | register struct window *w; | |
880 | ||
265a9e55 | 881 | for (;!NILP (window); window = w->next) |
a2889657 | 882 | { |
ded34426 | 883 | if (XTYPE (window) != Lisp_Window) abort (); |
a2889657 JB |
884 | w = XWINDOW (window); |
885 | ||
265a9e55 | 886 | if (!NILP (w->buffer)) |
bd66d1ba RS |
887 | { |
888 | XFASTINT (w->last_modified) | |
889 | = !flag ? 0 | |
890 | : XBUFFER (w->buffer) == current_buffer | |
891 | ? MODIFF : BUF_MODIFF (XBUFFER (w->buffer)); | |
892 | ||
893 | /* Record if we are showing a region, so can make sure to | |
894 | update it fully at next redisplay. */ | |
895 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
896 | && !NILP (XBUFFER (w->buffer)->mark_active) | |
897 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
898 | : Qnil); | |
899 | } | |
900 | ||
a2889657 JB |
901 | w->window_end_valid = Qt; |
902 | w->update_mode_line = Qnil; | |
903 | ||
265a9e55 | 904 | if (!NILP (w->vchild)) |
a2889657 | 905 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 906 | if (!NILP (w->hchild)) |
a2889657 JB |
907 | mark_window_display_accurate (w->hchild, flag); |
908 | } | |
909 | ||
910 | if (flag) | |
911 | { | |
912 | last_arrow_position = Voverlay_arrow_position; | |
913 | last_arrow_string = Voverlay_arrow_string; | |
914 | } | |
915 | else | |
916 | { | |
917 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
918 | last_arrow_position = Qt; | |
919 | last_arrow_string = Qt; | |
920 | } | |
921 | } | |
922 | \f | |
90adcf20 RS |
923 | /* Update the menu bar item lists for WINDOW |
924 | and its subwindows and siblings. | |
925 | This has to be done before we start to fill in any display lines, | |
926 | because it can call eval. */ | |
927 | ||
928 | static void | |
929 | update_menu_bars (window) | |
930 | Lisp_Object window; | |
931 | { | |
932 | for (; !NILP (window); window = XWINDOW (window)->next) | |
0cc7bdb8 | 933 | update_menu_bar (window); |
90adcf20 RS |
934 | } |
935 | ||
936 | /* Update the menu bar item list for window WINDOW and its subwindows. */ | |
937 | ||
938 | static void | |
0cc7bdb8 | 939 | update_menu_bar (window) |
90adcf20 | 940 | Lisp_Object window; |
90adcf20 RS |
941 | { |
942 | register struct window *w = XWINDOW (window); | |
943 | struct buffer *old = current_buffer; | |
944 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
945 | ||
946 | /* If this is a combination window, do its children; that's all. */ | |
947 | ||
948 | if (!NILP (w->vchild)) | |
949 | { | |
950 | update_menu_bars (w->vchild); | |
951 | return; | |
952 | } | |
953 | if (!NILP (w->hchild)) | |
954 | { | |
955 | update_menu_bars (w->hchild); | |
956 | return; | |
957 | } | |
958 | if (NILP (w->buffer)) | |
959 | abort (); | |
960 | ||
961 | if (update_mode_lines) | |
962 | w->update_mode_line = Qt; | |
963 | ||
964 | /* When we reach a frame's selected window, redo the frame's menu bar. */ | |
965 | if (!NILP (w->update_mode_line) | |
78614721 FP |
966 | #ifdef USE_X_TOOLKIT |
967 | && FRAME_EXTERNAL_MENU_BAR (f) | |
968 | #else | |
90adcf20 | 969 | && FRAME_MENU_BAR_LINES (f) > 0 |
78614721 | 970 | #endif |
90adcf20 RS |
971 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
972 | { | |
973 | /* If the user has switched buffers or windows, we need to | |
974 | recompute to reflect the new bindings. But we'll | |
975 | recompute when update_mode_lines is set too; that means | |
976 | that people can use force-mode-line-update to request | |
977 | that the menu bar be recomputed. The adverse effect on | |
978 | the rest of the redisplay algorithm is about the same as | |
979 | windows_or_buffers_changed anyway. */ | |
980 | if (windows_or_buffers_changed | |
981 | || update_mode_lines | |
982 | || (XFASTINT (w->last_modified) < MODIFF | |
983 | && (XFASTINT (w->last_modified) | |
984 | <= XBUFFER (w->buffer)->save_modified))) | |
985 | { | |
986 | struct buffer *prev = current_buffer; | |
987 | current_buffer = XBUFFER (w->buffer); | |
8351baf2 | 988 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); |
90adcf20 | 989 | current_buffer = prev; |
76412d64 | 990 | #ifdef USE_X_TOOLKIT |
01a054bc | 991 | set_frame_menubar (f, 0); |
76412d64 | 992 | #endif /* USE_X_TOOLKIT */ |
90adcf20 RS |
993 | } |
994 | } | |
995 | } | |
996 | \f | |
a2889657 JB |
997 | int do_id = 1; |
998 | ||
90adcf20 RS |
999 | /* Redisplay WINDOW and its subwindows and siblings. */ |
1000 | ||
a2889657 JB |
1001 | static void |
1002 | redisplay_windows (window) | |
1003 | Lisp_Object window; | |
1004 | { | |
265a9e55 | 1005 | for (; !NILP (window); window = XWINDOW (window)->next) |
a2889657 JB |
1006 | redisplay_window (window, 0); |
1007 | } | |
1008 | ||
90adcf20 RS |
1009 | /* Redisplay window WINDOW and its subwindows. */ |
1010 | ||
a2889657 JB |
1011 | static void |
1012 | redisplay_window (window, just_this_one) | |
1013 | Lisp_Object window; | |
1014 | int just_this_one; | |
1015 | { | |
1016 | register struct window *w = XWINDOW (window); | |
30c566e4 | 1017 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 JB |
1018 | int height; |
1019 | register int lpoint = point; | |
1020 | struct buffer *old = current_buffer; | |
b1d1124b | 1021 | register int width = window_internal_width (w) - 1; |
a2889657 JB |
1022 | register int startp; |
1023 | register int hscroll = XINT (w->hscroll); | |
1024 | struct position pos; | |
b1d1124b | 1025 | int opoint = point; |
a2889657 JB |
1026 | int tem; |
1027 | int window_needs_modeline; | |
1028 | ||
44fa5b1e | 1029 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
1030 | |
1031 | /* If this is a combination window, do its children; that's all. */ | |
1032 | ||
265a9e55 | 1033 | if (!NILP (w->vchild)) |
a2889657 JB |
1034 | { |
1035 | redisplay_windows (w->vchild); | |
1036 | return; | |
1037 | } | |
265a9e55 | 1038 | if (!NILP (w->hchild)) |
a2889657 JB |
1039 | { |
1040 | redisplay_windows (w->hchild); | |
1041 | return; | |
1042 | } | |
265a9e55 | 1043 | if (NILP (w->buffer)) |
a2889657 | 1044 | abort (); |
8de2d90b JB |
1045 | |
1046 | height = window_internal_height (w); | |
1047 | ||
1048 | if (MINI_WINDOW_P (w)) | |
1049 | { | |
1050 | if (w == XWINDOW (minibuf_window)) | |
1051 | { | |
1052 | if (echo_area_glyphs) | |
1053 | /* We've already displayed the echo area glyphs, if any. */ | |
88f22aff | 1054 | goto finish_scroll_bars; |
8de2d90b JB |
1055 | } |
1056 | else | |
1057 | { | |
1058 | /* This is a minibuffer, but it's not the currently active one, so | |
1059 | clear it. */ | |
44fa5b1e | 1060 | int vpos = XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
8de2d90b JB |
1061 | int i; |
1062 | ||
1063 | for (i = 0; i < height; i++) | |
1064 | { | |
44fa5b1e | 1065 | get_display_line (f, vpos + i, 0); |
278feba9 | 1066 | display_string (w, vpos + i, "", 0, 0, 0, 1, 0, width); |
8de2d90b JB |
1067 | } |
1068 | ||
88f22aff | 1069 | goto finish_scroll_bars; |
8de2d90b JB |
1070 | } |
1071 | } | |
a2889657 JB |
1072 | |
1073 | if (update_mode_lines) | |
1074 | w->update_mode_line = Qt; | |
1075 | ||
1076 | /* Otherwise set up data on this window; select its buffer and point value */ | |
1077 | ||
a2889657 JB |
1078 | current_buffer = XBUFFER (w->buffer); |
1079 | opoint = point; | |
1080 | ||
1081 | /* Count number of windows showing the selected buffer. */ | |
1082 | ||
1083 | if (!just_this_one | |
1084 | && current_buffer == XBUFFER (XWINDOW (selected_window)->buffer)) | |
1085 | buffer_shared++; | |
1086 | ||
1087 | /* POINT refers normally to the selected window. | |
1088 | For any other window, set up appropriate value. */ | |
1089 | ||
1090 | if (!EQ (window, selected_window)) | |
1091 | { | |
1092 | SET_PT (marker_position (w->pointm)); | |
1093 | if (point < BEGV) | |
1094 | { | |
265a9e55 | 1095 | SET_PT (BEGV); |
a2889657 JB |
1096 | Fset_marker (w->pointm, make_number (point), Qnil); |
1097 | } | |
1098 | else if (point > (ZV - 1)) | |
1099 | { | |
265a9e55 | 1100 | SET_PT (ZV); |
a2889657 JB |
1101 | Fset_marker (w->pointm, make_number (point), Qnil); |
1102 | } | |
1103 | } | |
1104 | ||
1105 | /* If window-start is screwed up, choose a new one. */ | |
a2889657 JB |
1106 | if (XMARKER (w->start)->buffer != current_buffer) |
1107 | goto recenter; | |
1108 | ||
1109 | startp = marker_position (w->start); | |
1110 | ||
8de2d90b | 1111 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 1112 | unless the specified location is outside the accessible range. */ |
265a9e55 | 1113 | if (!NILP (w->force_start)) |
a2889657 | 1114 | { |
aa6d10fa RS |
1115 | /* Forget any recorded base line for line number display. */ |
1116 | w->base_line_number = Qnil; | |
a2889657 JB |
1117 | w->update_mode_line = Qt; |
1118 | w->force_start = Qnil; | |
1119 | XFASTINT (w->last_modified) = 0; | |
8de2d90b JB |
1120 | if (startp < BEGV) startp = BEGV; |
1121 | if (startp > ZV) startp = ZV; | |
a2889657 JB |
1122 | try_window (window, startp); |
1123 | if (cursor_vpos < 0) | |
1124 | { | |
bd66d1ba | 1125 | /* ??? What should happen here if highlighting a region? */ |
a2889657 JB |
1126 | /* If point does not appear, move point so it does appear */ |
1127 | pos = *compute_motion (startp, 0, | |
1128 | ((EQ (window, minibuf_window) && startp == 1) | |
1129 | ? minibuf_prompt_width : 0) | |
1130 | + | |
1131 | (hscroll ? 1 - hscroll : 0), | |
1132 | ZV, height / 2, | |
1133 | - (1 << (SHORTBITS - 1)), | |
1134 | width, hscroll, pos_tab_offset (w, startp)); | |
1135 | SET_PT (pos.bufpos); | |
90adcf20 | 1136 | if (w != XWINDOW (selected_window)) |
a2889657 JB |
1137 | Fset_marker (w->pointm, make_number (point), Qnil); |
1138 | else | |
1139 | { | |
9d6a6bb9 RS |
1140 | if (current_buffer == old) |
1141 | lpoint = point; | |
44fa5b1e JB |
1142 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
1143 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
1144 | } |
1145 | } | |
1146 | goto done; | |
1147 | } | |
1148 | ||
1149 | /* Handle case where text has not changed, only point, | |
44fa5b1e | 1150 | and it has not moved off the frame */ |
a2889657 JB |
1151 | |
1152 | /* This code is not used for minibuffer for the sake of | |
1153 | the case of redisplaying to replace an echo area message; | |
1154 | since in that case the minibuffer contents per se are usually unchanged. | |
1155 | This code is of no real use in the minibuffer since | |
1156 | the handling of this_line_bufpos, etc., | |
1157 | in redisplay handles the same cases. */ | |
1158 | ||
1159 | if (XFASTINT (w->last_modified) >= MODIFF | |
1160 | && point >= startp && !clip_changed | |
44fa5b1e | 1161 | && (just_this_one || XFASTINT (w->width) == FRAME_WIDTH (f)) |
bd66d1ba RS |
1162 | /* Can't use this case if highlighting a region. */ |
1163 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1164 | && NILP (w->region_showing) | |
a2889657 JB |
1165 | && !EQ (window, minibuf_window)) |
1166 | { | |
1167 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), | |
1168 | point, height + 1, 10000, width, hscroll, | |
1169 | pos_tab_offset (w, startp)); | |
1170 | ||
1171 | if (pos.vpos < height) | |
1172 | { | |
44fa5b1e JB |
1173 | /* Ok, point is still on frame */ |
1174 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
1175 | { |
1176 | /* These variables are supposed to be origin 1 */ | |
44fa5b1e JB |
1177 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
1178 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
1179 | } |
1180 | /* This doesn't do the trick, because if a window to the right of | |
1181 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 1182 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 1183 | redisplayed, making likes that are empty in this window's columns. |
44fa5b1e | 1184 | if (XFASTINT (w->width) != FRAME_WIDTH (f)) |
a2889657 JB |
1185 | preserve_my_columns (w); |
1186 | */ | |
1187 | goto done; | |
1188 | } | |
1189 | /* Don't bother trying redisplay with same start; | |
1190 | we already know it will lose */ | |
1191 | } | |
1192 | /* If current starting point was originally the beginning of a line | |
1193 | but no longer is, find a new starting point. */ | |
265a9e55 | 1194 | else if (!NILP (w->start_at_line_beg) |
a2889657 JB |
1195 | && !(startp == BEGV |
1196 | || FETCH_CHAR (startp - 1) == '\n')) | |
1197 | { | |
1198 | goto recenter; | |
1199 | } | |
1200 | else if (just_this_one && !MINI_WINDOW_P (w) | |
1201 | && point >= startp | |
1202 | && XFASTINT (w->last_modified) | |
14709f21 JB |
1203 | /* or else vmotion on first line won't work. */ |
1204 | && ! NILP (w->start_at_line_beg) | |
a2889657 JB |
1205 | && ! EQ (w->window_end_valid, Qnil) |
1206 | && do_id && !clip_changed | |
1207 | && !blank_end_of_window | |
44fa5b1e | 1208 | && XFASTINT (w->width) == FRAME_WIDTH (f) |
bd66d1ba RS |
1209 | /* Can't use this case if highlighting a region. */ |
1210 | && !(!NILP (Vtransient_mark_mode) | |
1211 | && !NILP (current_buffer->mark_active)) | |
1212 | && NILP (w->region_showing) | |
a2889657 JB |
1213 | && EQ (last_arrow_position, Voverlay_arrow_position) |
1214 | && EQ (last_arrow_string, Voverlay_arrow_string) | |
44fa5b1e | 1215 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
1216 | && tem != -2) |
1217 | { | |
1218 | /* tem > 0 means success. tem == -1 means choose new start. | |
1219 | tem == -2 means try again with same start, | |
1220 | and nothing but whitespace follows the changed stuff. | |
1221 | tem == 0 means try again with same start. */ | |
1222 | if (tem > 0) | |
1223 | goto done; | |
1224 | } | |
1225 | else if (startp >= BEGV && startp <= ZV | |
1226 | /* Avoid starting display at end of buffer! */ | |
8de2d90b | 1227 | && (startp < ZV || startp == BEGV |
a2889657 JB |
1228 | || (XFASTINT (w->last_modified) >= MODIFF))) |
1229 | { | |
1230 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 1231 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
1232 | try_window (window, startp); |
1233 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
1234 | { |
1235 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
1236 | /* Forget any recorded base line for line number display. */ | |
1237 | w->base_line_number = Qnil; | |
1238 | goto done; | |
1239 | } | |
a2889657 JB |
1240 | else |
1241 | cancel_my_columns (w); | |
1242 | } | |
1243 | ||
1244 | XFASTINT (w->last_modified) = 0; | |
1245 | w->update_mode_line = Qt; | |
1246 | ||
1247 | /* Try to scroll by specified few lines */ | |
1248 | ||
1249 | if (scroll_step && !clip_changed) | |
1250 | { | |
1251 | if (point > startp) | |
1252 | { | |
1253 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1254 | scroll_step, width, hscroll, window); | |
1255 | if (pos.vpos >= height) | |
1256 | goto scroll_fail; | |
1257 | } | |
1258 | ||
1259 | pos = *vmotion (startp, point < startp ? - scroll_step : scroll_step, | |
1260 | width, hscroll, window); | |
1261 | ||
1262 | if (point >= pos.bufpos) | |
1263 | { | |
1264 | try_window (window, pos.bufpos); | |
1265 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
1266 | { |
1267 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
1268 | /* Forget any recorded base line for line number display. */ | |
1269 | w->base_line_number = Qnil; | |
1270 | goto done; | |
1271 | } | |
a2889657 JB |
1272 | else |
1273 | cancel_my_columns (w); | |
1274 | } | |
1275 | scroll_fail: ; | |
1276 | } | |
1277 | ||
1278 | /* Finally, just choose place to start which centers point */ | |
1279 | ||
1280 | recenter: | |
aa6d10fa RS |
1281 | /* Forget any previously recorded base line for line number display. */ |
1282 | w->base_line_number = Qnil; | |
1283 | ||
484ab76a | 1284 | pos = *vmotion (point, - (height / 2), width, hscroll, window); |
a2889657 JB |
1285 | try_window (window, pos.bufpos); |
1286 | ||
1287 | startp = marker_position (w->start); | |
1288 | w->start_at_line_beg = | |
1289 | (startp == BEGV || FETCH_CHAR (startp - 1) == '\n') ? Qt : Qnil; | |
1290 | ||
1291 | done: | |
265a9e55 | 1292 | if ((!NILP (w->update_mode_line) |
aa6d10fa RS |
1293 | /* If window not full width, must redo its mode line |
1294 | if the window to its side is being redone */ | |
1295 | || (!just_this_one && width < FRAME_WIDTH (f) - 1) | |
1296 | || INTEGERP (w->base_line_pos)) | |
a2889657 JB |
1297 | && height != XFASTINT (w->height)) |
1298 | display_mode_line (w); | |
aa6d10fa RS |
1299 | if (! line_number_displayed |
1300 | && ! BUFFERP (w->base_line_pos)) | |
1301 | { | |
1302 | w->base_line_pos = Qnil; | |
1303 | w->base_line_number = Qnil; | |
1304 | } | |
a2889657 | 1305 | |
7ce2c095 RS |
1306 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
1307 | if (!NILP (w->update_mode_line) | |
76412d64 RS |
1308 | #ifdef USE_X_TOOLKIT |
1309 | && FRAME_EXTERNAL_MENU_BAR (f) | |
1310 | #else | |
7ce2c095 | 1311 | && FRAME_MENU_BAR_LINES (f) > 0 |
76412d64 | 1312 | #endif |
7ce2c095 RS |
1313 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
1314 | display_menu_bar (w); | |
1315 | ||
88f22aff JB |
1316 | finish_scroll_bars: |
1317 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 1318 | { |
b1d1124b | 1319 | int start, end, whole; |
30c566e4 | 1320 | |
b1d1124b | 1321 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
1322 | At some point, it would be nice to choose between scrollbars |
1323 | which reflect the whole buffer size, with special markers | |
1324 | indicating narrowing, and scrollbars which reflect only the | |
1325 | visible region. | |
1326 | ||
b1d1124b JB |
1327 | Note that minibuffers sometimes aren't displaying any text. */ |
1328 | if (! MINI_WINDOW_P (w) | |
1329 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
1330 | { | |
8a9311d7 | 1331 | whole = ZV - BEGV; |
6887f623 | 1332 | start = startp - BEGV; |
b1d1124b JB |
1333 | /* I don't think this is guaranteed to be right. For the |
1334 | moment, we'll pretend it is. */ | |
85f26be9 | 1335 | end = (Z - XINT (w->window_end_pos)) - BEGV; |
3505ea70 JB |
1336 | |
1337 | if (end < start) end = start; | |
8a9311d7 | 1338 | if (whole < (end - start)) whole = end - start; |
b1d1124b JB |
1339 | } |
1340 | else | |
1341 | start = end = whole = 0; | |
30c566e4 | 1342 | |
88f22aff | 1343 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 1344 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 1345 | |
88f22aff | 1346 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 1347 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 1348 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 1349 | } |
b1d1124b JB |
1350 | |
1351 | SET_PT (opoint); | |
1352 | current_buffer = old; | |
1353 | SET_PT (lpoint); | |
a2889657 JB |
1354 | } |
1355 | \f | |
1356 | /* Do full redisplay on one window, starting at position `pos'. */ | |
1357 | ||
1358 | static void | |
1359 | try_window (window, pos) | |
1360 | Lisp_Object window; | |
1361 | register int pos; | |
1362 | { | |
1363 | register struct window *w = XWINDOW (window); | |
1364 | register int height = window_internal_height (w); | |
1365 | register int vpos = XFASTINT (w->top); | |
1366 | register int last_text_vpos = vpos; | |
1367 | int tab_offset = pos_tab_offset (w, pos); | |
44fa5b1e | 1368 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 1369 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1370 | struct position val; |
1371 | ||
1372 | Fset_marker (w->start, make_number (pos), Qnil); | |
1373 | cursor_vpos = -1; | |
1374 | overlay_arrow_seen = 0; | |
1375 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1376 | ||
1377 | while (--height >= 0) | |
1378 | { | |
1379 | val = *display_text_line (w, pos, vpos, val.hpos, tab_offset); | |
1380 | tab_offset += width; | |
1381 | if (val.vpos) tab_offset = 0; | |
1382 | vpos++; | |
1383 | if (pos != val.bufpos) | |
1384 | last_text_vpos | |
1385 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
b0a0fbda | 1386 | = vpos - (val.vpos && (FETCH_CHAR (val.bufpos - 1) != '\n' |
e885523c | 1387 | #ifdef USE_TEXT_PROPERTIES |
3ae8ced7 | 1388 | || ! NILP (Fget_char_property (val.bufpos-1, |
b0a0fbda | 1389 | Qinvisible, |
3ae8ced7 | 1390 | window)) |
e885523c KH |
1391 | #endif |
1392 | )); | |
a2889657 JB |
1393 | pos = val.bufpos; |
1394 | } | |
1395 | ||
1396 | /* If last line is continued in middle of character, | |
44fa5b1e | 1397 | include the split character in the text considered on the frame */ |
a2889657 JB |
1398 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
1399 | pos++; | |
1400 | ||
44fa5b1e | 1401 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1402 | if (XFASTINT (w->window_end_pos) == 0 |
1403 | && Z != pos) | |
1404 | w->update_mode_line = Qt; | |
1405 | ||
44fa5b1e | 1406 | /* Say where last char on frame will be, once redisplay is finished. */ |
a2889657 JB |
1407 | XFASTINT (w->window_end_pos) = Z - pos; |
1408 | XFASTINT (w->window_end_vpos) = last_text_vpos - XFASTINT (w->top); | |
1409 | /* But that is not valid info until redisplay finishes. */ | |
1410 | w->window_end_valid = Qnil; | |
1411 | } | |
1412 | \f | |
1413 | /* Try to redisplay when buffer is modified locally, | |
1414 | computing insert/delete line to preserve text outside | |
1415 | the bounds of the changes. | |
1416 | Return 1 if successful, 0 if if cannot tell what to do, | |
1417 | or -1 to tell caller to find a new window start, | |
1418 | or -2 to tell caller to do normal redisplay with same window start. */ | |
1419 | ||
1420 | static int | |
1421 | try_window_id (window) | |
1422 | Lisp_Object window; | |
1423 | { | |
1424 | int pos; | |
1425 | register struct window *w = XWINDOW (window); | |
1426 | register int height = window_internal_height (w); | |
44fa5b1e | 1427 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
1428 | int top = XFASTINT (w->top); |
1429 | int start = marker_position (w->start); | |
b1d1124b | 1430 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1431 | int hscroll = XINT (w->hscroll); |
1432 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
1433 | register int vpos; | |
1434 | register int i, tem; | |
1435 | int last_text_vpos = 0; | |
1436 | int stop_vpos; | |
9f412332 KH |
1437 | int selective |
1438 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1439 | ? XINT (current_buffer->selective_display) | |
1440 | : !NILP (current_buffer->selective_display) ? -1 : 0; | |
a2889657 JB |
1441 | |
1442 | struct position val, bp, ep, xp, pp; | |
1443 | int scroll_amount = 0; | |
1444 | int delta; | |
1445 | int tab_offset, epto; | |
1446 | ||
1447 | if (GPT - BEG < beg_unchanged) | |
1448 | beg_unchanged = GPT - BEG; | |
1449 | if (Z - GPT < end_unchanged) | |
1450 | end_unchanged = Z - GPT; | |
1451 | ||
6a1dc7ac | 1452 | if (beg_unchanged + BEG < start) |
a2889657 JB |
1453 | return 0; /* Give up if changes go above top of window */ |
1454 | ||
1455 | /* Find position before which nothing is changed. */ | |
1456 | bp = *compute_motion (start, 0, lmargin, | |
6a1dc7ac KH |
1457 | min (ZV, beg_unchanged + BEG), height + 1, 0, |
1458 | width, hscroll, pos_tab_offset (w, start)); | |
a2889657 | 1459 | if (bp.vpos >= height) |
6e8290aa JB |
1460 | { |
1461 | if (point < bp.bufpos && !bp.contin) | |
1462 | { | |
44fa5b1e JB |
1463 | /* All changes are below the frame, and point is on the frame. |
1464 | We don't need to change the frame at all. | |
6e8290aa JB |
1465 | But we need to update window_end_pos to account for |
1466 | any change in buffer size. */ | |
f7be7f78 JB |
1467 | bp = *compute_motion (start, 0, lmargin, |
1468 | Z, height, 0, | |
1469 | width, hscroll, pos_tab_offset (w, start)); | |
6e8290aa JB |
1470 | XFASTINT (w->window_end_vpos) = height; |
1471 | XFASTINT (w->window_end_pos) = Z - bp.bufpos; | |
1472 | return 1; | |
1473 | } | |
1474 | return 0; | |
1475 | } | |
a2889657 JB |
1476 | |
1477 | vpos = bp.vpos; | |
1478 | ||
44fa5b1e | 1479 | /* Find beginning of that frame line. Must display from there. */ |
a2889657 JB |
1480 | bp = *vmotion (bp.bufpos, 0, width, hscroll, window); |
1481 | ||
1482 | pos = bp.bufpos; | |
1483 | val.hpos = lmargin; | |
1484 | if (pos < start) | |
1485 | return -1; | |
1486 | ||
1487 | /* If about to start displaying at the beginning of a continuation line, | |
44fa5b1e | 1488 | really start with previous frame line, in case it was not |
a2889657 | 1489 | continued when last redisplayed */ |
05ba02eb JB |
1490 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
1491 | || | |
1492 | /* Likewise if we have to worry about selective display. */ | |
9f412332 | 1493 | (selective > 0 && bp.bufpos - 1 == beg_unchanged && vpos > 0)) |
a2889657 JB |
1494 | { |
1495 | bp = *vmotion (bp.bufpos, -1, width, hscroll, window); | |
1496 | --vpos; | |
1497 | pos = bp.bufpos; | |
1498 | } | |
1499 | ||
1500 | if (bp.contin && bp.hpos != lmargin) | |
1501 | { | |
1502 | val.hpos = bp.prevhpos - width + lmargin; | |
1503 | pos--; | |
1504 | } | |
1505 | ||
1506 | bp.vpos = vpos; | |
1507 | ||
1508 | /* Find first visible newline after which no more is changed. */ | |
1509 | tem = find_next_newline (Z - max (end_unchanged, Z - ZV), 1); | |
9f412332 KH |
1510 | if (selective > 0) |
1511 | while (tem < ZV - 1 && (indented_beyond_p (tem, selective))) | |
a2889657 JB |
1512 | tem = find_next_newline (tem, 1); |
1513 | ||
1514 | /* Compute the cursor position after that newline. */ | |
1515 | ep = *compute_motion (pos, vpos, val.hpos, tem, | |
1516 | height, - (1 << (SHORTBITS - 1)), | |
1517 | width, hscroll, pos_tab_offset (w, bp.bufpos)); | |
1518 | ||
44fa5b1e JB |
1519 | /* If changes reach past the text available on the frame, |
1520 | just display rest of frame. */ | |
a2889657 JB |
1521 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
1522 | stop_vpos = height; | |
1523 | else | |
1524 | stop_vpos = ep.vpos; | |
1525 | ||
1526 | /* If no newline before ep, the line ep is on includes some changes | |
1527 | that must be displayed. Make sure we don't stop before it. */ | |
1528 | /* Also, if changes reach all the way until ep.bufpos, | |
1529 | it is possible that something was deleted after the | |
1530 | newline before it, so the following line must be redrawn. */ | |
1531 | if (stop_vpos == ep.vpos | |
1532 | && (ep.bufpos == BEGV | |
1533 | || FETCH_CHAR (ep.bufpos - 1) != '\n' | |
1534 | || ep.bufpos == Z - end_unchanged)) | |
1535 | stop_vpos = ep.vpos + 1; | |
1536 | ||
1537 | cursor_vpos = -1; | |
1538 | overlay_arrow_seen = 0; | |
1539 | ||
1540 | /* If changes do not reach to bottom of window, | |
1541 | figure out how much to scroll the rest of the window */ | |
1542 | if (stop_vpos < height) | |
1543 | { | |
1544 | /* Now determine how far up or down the rest of the window has moved */ | |
1545 | epto = pos_tab_offset (w, ep.bufpos); | |
1546 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1547 | Z - XFASTINT (w->window_end_pos), | |
1548 | 10000, 0, width, hscroll, epto); | |
1549 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); | |
1550 | ||
44fa5b1e | 1551 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
1552 | If so, no scrolling is really necessary. */ |
1553 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
1554 | { | |
1555 | tem = FETCH_CHAR (i); | |
1556 | if (tem != ' ' && tem != '\n' && tem != '\t') | |
1557 | break; | |
1558 | } | |
1559 | if (i == xp.bufpos) | |
1560 | return -2; | |
1561 | ||
1562 | XFASTINT (w->window_end_vpos) += scroll_amount; | |
1563 | ||
44fa5b1e | 1564 | /* Before doing any scrolling, verify that point will be on frame. */ |
a2889657 JB |
1565 | if (point > ep.bufpos && !(point <= xp.bufpos && xp.bufpos < height)) |
1566 | { | |
1567 | if (point <= xp.bufpos) | |
1568 | { | |
1569 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1570 | point, height, - (1 << (SHORTBITS - 1)), | |
1571 | width, hscroll, epto); | |
1572 | } | |
1573 | else | |
1574 | { | |
1575 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, | |
1576 | point, height, - (1 << (SHORTBITS - 1)), | |
1577 | width, hscroll, pos_tab_offset (w, xp.bufpos)); | |
1578 | } | |
1579 | if (pp.bufpos < point || pp.vpos == height) | |
1580 | return 0; | |
1581 | cursor_vpos = pp.vpos + top; | |
1582 | cursor_hpos = pp.hpos + XFASTINT (w->left); | |
1583 | } | |
1584 | ||
1585 | if (stop_vpos - scroll_amount >= height | |
1586 | || ep.bufpos == xp.bufpos) | |
1587 | { | |
1588 | if (scroll_amount < 0) | |
1589 | stop_vpos -= scroll_amount; | |
1590 | scroll_amount = 0; | |
1591 | /* In this path, we have altered window_end_vpos | |
1592 | and not left it negative. | |
1593 | We must make sure that, in case display is preempted | |
44fa5b1e | 1594 | before the frame changes to reflect what we do here, |
a2889657 | 1595 | further updates will not come to try_window_id |
44fa5b1e | 1596 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
1597 | blank_end_of_window = 1; |
1598 | } | |
1599 | else if (!scroll_amount) | |
1600 | {} | |
1601 | else if (bp.bufpos == Z - end_unchanged) | |
1602 | { | |
1603 | /* If reprinting everything is nearly as fast as scrolling, | |
1604 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 1605 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1606 | top + height - max (0, scroll_amount), |
1607 | scroll_amount) | |
1608 | > xp.bufpos - bp.bufpos - 20) | |
1609 | /* Return "try normal display with same window-start." | |
1610 | Too bad we can't prevent further scroll-thinking. */ | |
1611 | return -2; | |
1612 | /* If pure deletion, scroll up as many lines as possible. | |
1613 | In common case of killing a line, this can save the | |
1614 | following line from being overwritten by scrolling | |
1615 | and therefore having to be redrawn. */ | |
44fa5b1e | 1616 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
d1cb44a4 RS |
1617 | top + height - max (0, scroll_amount), |
1618 | scroll_amount, bp.bufpos); | |
a2889657 JB |
1619 | if (!tem) stop_vpos = height; |
1620 | } | |
1621 | else if (scroll_amount) | |
1622 | { | |
1623 | /* If reprinting everything is nearly as fast as scrolling, | |
1624 | don't bother scrolling. Can happen if lines are short. */ | |
1625 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
1626 | overestimate of cost of reprinting, since xp.bufpos | |
1627 | would end up below the bottom of the window. */ | |
44fa5b1e | 1628 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1629 | top + height - max (0, scroll_amount), |
1630 | scroll_amount) | |
1631 | > xp.bufpos - ep.bufpos - 20) | |
1632 | /* Return "try normal display with same window-start." | |
1633 | Too bad we can't prevent further scroll-thinking. */ | |
1634 | return -2; | |
44fa5b1e | 1635 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 | 1636 | top + height - max (0, scroll_amount), |
d1cb44a4 | 1637 | scroll_amount, ep.bufpos); |
a2889657 JB |
1638 | if (!tem) stop_vpos = height; |
1639 | } | |
1640 | } | |
1641 | ||
1642 | /* In any case, do not display past bottom of window */ | |
1643 | if (stop_vpos >= height) | |
1644 | { | |
1645 | stop_vpos = height; | |
1646 | scroll_amount = 0; | |
1647 | } | |
1648 | ||
1649 | /* Handle case where pos is before w->start -- | |
1650 | can happen if part of line had been clipped and is not clipped now */ | |
1651 | if (vpos == 0 && pos < marker_position (w->start)) | |
1652 | Fset_marker (w->start, make_number (pos), Qnil); | |
1653 | ||
1654 | /* Redisplay the lines where the text was changed */ | |
1655 | last_text_vpos = vpos; | |
1656 | tab_offset = pos_tab_offset (w, pos); | |
1657 | /* If we are starting display in mid-character, correct tab_offset | |
1658 | to account for passing the line that that character really starts in. */ | |
1659 | if (val.hpos < lmargin) | |
1660 | tab_offset += width; | |
1661 | while (vpos < stop_vpos) | |
1662 | { | |
1663 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1664 | tab_offset += width; | |
1665 | if (val.vpos) tab_offset = 0; | |
1666 | if (pos != val.bufpos) | |
1667 | last_text_vpos | |
1668 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1669 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1670 | pos = val.bufpos; | |
1671 | } | |
1672 | ||
1673 | /* There are two cases: | |
1674 | 1) we have displayed down to the bottom of the window | |
1675 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
1676 | ||
1677 | if (vpos == height) | |
1678 | { | |
1679 | /* If last line is continued in middle of character, | |
44fa5b1e | 1680 | include the split character in the text considered on the frame */ |
a2889657 JB |
1681 | if (val.hpos < lmargin) |
1682 | val.bufpos++; | |
1683 | XFASTINT (w->window_end_vpos) = last_text_vpos; | |
1684 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1685 | } | |
1686 | ||
1687 | /* If scrolling made blank lines at window bottom, | |
1688 | redisplay to fill those lines */ | |
1689 | if (scroll_amount < 0) | |
1690 | { | |
1691 | /* Don't consider these lines for general-purpose scrolling. | |
1692 | That will save time in the scrolling computation. */ | |
44fa5b1e | 1693 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
1694 | vpos = xp.vpos; |
1695 | pos = xp.bufpos; | |
1696 | val.hpos = lmargin; | |
1697 | if (pos == ZV) | |
1698 | vpos = height + scroll_amount; | |
1699 | else if (xp.contin && xp.hpos != lmargin) | |
1700 | { | |
1701 | val.hpos = xp.prevhpos - width + lmargin; | |
1702 | pos--; | |
1703 | } | |
1704 | ||
1705 | blank_end_of_window = 1; | |
1706 | tab_offset = pos_tab_offset (w, pos); | |
1707 | /* If we are starting display in mid-character, correct tab_offset | |
1708 | to account for passing the line that that character starts in. */ | |
1709 | if (val.hpos < lmargin) | |
1710 | tab_offset += width; | |
1711 | ||
1712 | while (vpos < height) | |
1713 | { | |
1714 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1715 | tab_offset += width; | |
1716 | if (val.vpos) tab_offset = 0; | |
1717 | pos = val.bufpos; | |
1718 | } | |
1719 | ||
1720 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
1721 | Make it be fixed up, below. */ | |
1722 | if (xp.bufpos == ZV | |
1723 | && xp.bufpos == point) | |
1724 | cursor_vpos = -1; | |
1725 | } | |
1726 | ||
44fa5b1e | 1727 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1728 | if (XFASTINT (w->window_end_pos) == 0 |
1729 | && Z != val.bufpos) | |
1730 | w->update_mode_line = Qt; | |
1731 | ||
1732 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
1733 | if (scroll_amount) | |
1734 | { | |
1735 | delta = height - xp.vpos; | |
1736 | if (delta < 0 | |
1737 | || (delta > 0 && xp.bufpos <= ZV) | |
1738 | || (delta == 0 && xp.hpos)) | |
1739 | { | |
1740 | val = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1741 | delta, width, hscroll, window); | |
1742 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1743 | XFASTINT (w->window_end_vpos) += val.vpos; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | w->window_end_valid = Qnil; | |
1748 | ||
1749 | /* If point was not in a line that was displayed, find it */ | |
1750 | if (cursor_vpos < 0) | |
1751 | { | |
1752 | val = *compute_motion (start, 0, lmargin, point, 10000, 10000, | |
1753 | width, hscroll, pos_tab_offset (w, start)); | |
44fa5b1e | 1754 | /* Admit failure if point is off frame now */ |
a2889657 JB |
1755 | if (val.vpos >= height) |
1756 | { | |
1757 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 1758 | cancel_line (vpos + top, f); |
a2889657 JB |
1759 | return 0; |
1760 | } | |
1761 | cursor_vpos = val.vpos + top; | |
1762 | cursor_hpos = val.hpos + XFASTINT (w->left); | |
1763 | } | |
1764 | ||
44fa5b1e JB |
1765 | FRAME_CURSOR_X (f) = max (0, cursor_hpos); |
1766 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
a2889657 JB |
1767 | |
1768 | if (debug_end_pos) | |
1769 | { | |
1770 | val = *compute_motion (start, 0, lmargin, ZV, | |
1771 | height, - (1 << (SHORTBITS - 1)), | |
1772 | width, hscroll, pos_tab_offset (w, start)); | |
1773 | if (val.vpos != XFASTINT (w->window_end_vpos)) | |
1774 | abort (); | |
1775 | if (XFASTINT (w->window_end_pos) | |
1776 | != Z - val.bufpos) | |
1777 | abort (); | |
1778 | } | |
1779 | ||
1780 | return 1; | |
1781 | } | |
1782 | \f | |
31b24551 JB |
1783 | /* Mark a section of BUF as modified, but only for the sake of redisplay. |
1784 | This is useful for recording changes to overlays. | |
1785 | ||
1786 | We increment the buffer's modification timestamp and set the | |
1787 | redisplay caches (windows_or_buffers_changed, beg_unchanged, etc) | |
1788 | as if the region of text between START and END had been modified; | |
1789 | the redisplay code will check this against the windows' timestamps, | |
1790 | and redraw the appropriate area of the buffer. | |
1791 | ||
1792 | However, if the buffer is unmodified, we bump the last-save | |
1793 | timestamp as well, so that incrementing the timestamp doesn't fool | |
1794 | Emacs into thinking that the buffer's text has been modified. | |
1795 | ||
1796 | Tweaking the timestamps shouldn't hurt the first-modification | |
1797 | timestamps recorded in the undo records; those values aren't | |
1798 | written until just before a real text modification is made, so they | |
1799 | will never catch the timestamp value just before this function gets | |
1800 | called. */ | |
1801 | ||
1802 | void | |
1803 | redisplay_region (buf, start, end) | |
1804 | struct buffer *buf; | |
1805 | int start, end; | |
1806 | { | |
1807 | if (start == end) | |
1808 | return; | |
1809 | ||
1810 | if (start > end) | |
1811 | { | |
1812 | int temp = start; | |
1813 | start = end; end = temp; | |
1814 | } | |
1815 | ||
1816 | if (buf != current_buffer) | |
1817 | windows_or_buffers_changed = 1; | |
1818 | else | |
1819 | { | |
1820 | if (unchanged_modified == MODIFF) | |
1821 | { | |
1822 | beg_unchanged = start - BEG; | |
1823 | end_unchanged = Z - end; | |
1824 | } | |
1825 | else | |
1826 | { | |
1827 | if (Z - end < end_unchanged) | |
1828 | end_unchanged = Z - end; | |
1829 | if (start - BEG < beg_unchanged) | |
1830 | beg_unchanged = start - BEG; | |
1831 | } | |
1832 | } | |
1833 | ||
1834 | /* Increment the buffer's time stamp, but also increment the save | |
1835 | and autosave timestamps, so as not to screw up that timekeeping. */ | |
1836 | if (BUF_MODIFF (buf) == buf->save_modified) | |
1837 | buf->save_modified++; | |
1838 | if (BUF_MODIFF (buf) == buf->auto_save_modified) | |
1839 | buf->auto_save_modified++; | |
1840 | ||
1841 | BUF_MODIFF (buf) ++; | |
1842 | } | |
1843 | ||
1844 | \f | |
278feba9 | 1845 | /* Copy LEN glyphs starting address FROM to the rope TO. |
f7430cb6 | 1846 | But don't actually copy the parts that would come in before S. |
278feba9 RS |
1847 | Value is TO, advanced past the copied data. |
1848 | F is the frame we are displaying in. */ | |
a2889657 | 1849 | |
278feba9 RS |
1850 | static GLYPH * |
1851 | copy_part_of_rope (f, to, s, from, len, face) | |
1852 | FRAME_PTR f; | |
1853 | register GLYPH *to; /* Copy to here. */ | |
a2889657 | 1854 | register GLYPH *s; /* Starting point. */ |
278feba9 RS |
1855 | Lisp_Object *from; /* Data to copy. */ |
1856 | int len; | |
1c2250c2 | 1857 | int face; /* Face to apply to glyphs which don't specify one. */ |
a2889657 | 1858 | { |
278feba9 RS |
1859 | int n = len; |
1860 | register Lisp_Object *fp = from; | |
1861 | /* These cache the results of the last call to compute_glyph_face. */ | |
1862 | int last_code = -1; | |
1863 | int last_merged = 0; | |
c581d710 | 1864 | |
4cdc65eb KH |
1865 | #ifdef HAVE_X_WINDOWS |
1866 | if (! FRAME_TERMCAP_P (f)) | |
1867 | while (n--) | |
1868 | { | |
1869 | int glyph = XFASTINT (*fp); | |
1870 | int facecode; | |
1871 | ||
1872 | if (FAST_GLYPH_FACE (glyph) == 0) | |
1873 | /* If GLYPH has no face code, use FACE. */ | |
1874 | facecode = face; | |
1875 | else if (FAST_GLYPH_FACE (glyph) == last_code) | |
1876 | /* If it's same as previous glyph, use same result. */ | |
1877 | facecode = last_merged; | |
1878 | else | |
1879 | { | |
1880 | /* Merge this glyph's face and remember the result. */ | |
1881 | last_code = FAST_GLYPH_FACE (glyph); | |
1882 | last_merged = facecode = compute_glyph_face (f, last_code, face); | |
1883 | } | |
b2a76982 | 1884 | |
4cdc65eb KH |
1885 | if (to >= s) |
1886 | *to = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), facecode); | |
1887 | ++to; | |
1888 | ++fp; | |
1889 | } | |
1890 | else | |
1891 | #endif | |
1892 | while (n--) | |
1893 | { | |
1894 | if (to >= s) *to = XFASTINT (*fp); | |
1895 | ++to; | |
1896 | ++fp; | |
1897 | } | |
278feba9 | 1898 | return to; |
c581d710 RS |
1899 | } |
1900 | ||
278feba9 RS |
1901 | /* Correct a glyph by replacing its specified user-level face code |
1902 | with a displayable computed face code. */ | |
c581d710 | 1903 | |
278feba9 RS |
1904 | static GLYPH |
1905 | fix_glyph (f, glyph, current_face) | |
1906 | FRAME_PTR f; | |
1907 | GLYPH glyph; | |
1908 | int current_face; | |
c581d710 | 1909 | { |
4cdc65eb KH |
1910 | #ifdef HAVE_X_WINDOWS |
1911 | if (! FRAME_TERMCAP_P (f) && FAST_GLYPH_FACE (glyph) != 0) | |
1912 | return FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph), | |
1913 | compute_glyph_face (f, FAST_GLYPH_FACE (glyph), | |
1914 | current_face)); | |
1915 | #endif | |
1916 | return glyph; | |
a2889657 JB |
1917 | } |
1918 | \f | |
1919 | /* Display one line of window w, starting at position START in W's buffer. | |
1920 | Display starting at horizontal position HPOS, which is normally zero | |
1921 | or negative. A negative value causes output up to hpos = 0 to be discarded. | |
1922 | This is done for negative hscroll, or when this is a continuation line | |
1923 | and the continuation occurred in the middle of a multi-column character. | |
1924 | ||
1925 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
1926 | ||
44fa5b1e | 1927 | Display on position VPOS on the frame. (origin 0). |
a2889657 JB |
1928 | |
1929 | Returns a STRUCT POSITION giving character to start next line with | |
1930 | and where to display it, including a zero or negative hpos. | |
1931 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
1932 | ||
1933 | struct position val_display_text_line; | |
1934 | ||
1935 | static struct position * | |
1936 | display_text_line (w, start, vpos, hpos, taboffset) | |
1937 | struct window *w; | |
1938 | int start; | |
1939 | int vpos; | |
1940 | int hpos; | |
1941 | int taboffset; | |
1942 | { | |
1943 | register int pos = start; | |
1944 | register int c; | |
1945 | register GLYPH *p1; | |
1946 | int end; | |
1947 | register int pause; | |
1948 | register unsigned char *p; | |
1949 | GLYPH *endp; | |
1950 | register GLYPH *startp; | |
5fcbb24d | 1951 | register GLYPH *p1prev = 0; |
efc63ef0 RS |
1952 | register GLYPH *p1start; |
1953 | int *charstart; | |
44fa5b1e | 1954 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 1955 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 1956 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 1957 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1958 | struct position val; |
1959 | int lastpos; | |
1960 | int invis; | |
1961 | int hscroll = XINT (w->hscroll); | |
1962 | int truncate = hscroll | |
1963 | || (truncate_partial_width_windows | |
44fa5b1e | 1964 | && XFASTINT (w->width) < FRAME_WIDTH (f)) |
265a9e55 | 1965 | || !NILP (current_buffer->truncate_lines); |
bd66d1ba RS |
1966 | |
1967 | /* 1 if we should highlight the region. */ | |
1968 | int highlight_region | |
1969 | = !NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active); | |
1970 | int region_beg, region_end; | |
1971 | ||
a2889657 JB |
1972 | int selective |
1973 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1974 | ? XINT (current_buffer->selective_display) | |
265a9e55 | 1975 | : !NILP (current_buffer->selective_display) ? -1 : 0; |
44fa5b1e | 1976 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
a2889657 | 1977 | register struct Lisp_Vector *dp = window_display_table (w); |
68a37fa8 RS |
1978 | |
1979 | Lisp_Object default_invis_vector[3]; | |
1980 | /* Nonzero means display something where there are invisible lines. | |
1981 | The precise value is the number of glyphs to display. */ | |
a2889657 | 1982 | int selective_rlen |
c581d710 | 1983 | = (selective && dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector |
68a37fa8 RS |
1984 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
1985 | : selective && !NILP (current_buffer->selective_display_ellipses) | |
1986 | ? 3 : 0); | |
1987 | /* This is the sequence of Lisp objects to display | |
1988 | when there are invisible lines. */ | |
1989 | Lisp_Object *invis_vector_contents | |
1990 | = (dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector | |
1991 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents | |
1992 | : default_invis_vector); | |
1993 | ||
a2889657 | 1994 | GLYPH truncator = (dp == 0 || XTYPE (DISP_TRUNC_GLYPH (dp)) != Lisp_Int |
278feba9 | 1995 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); |
a2889657 | 1996 | GLYPH continuer = (dp == 0 || XTYPE (DISP_CONTINUE_GLYPH (dp)) != Lisp_Int |
278feba9 | 1997 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); |
a2889657 | 1998 | |
31b24551 JB |
1999 | /* The next buffer location at which the face should change, due |
2000 | to overlays or text property changes. */ | |
2001 | int next_face_change; | |
2002 | ||
b0a0fbda RS |
2003 | #ifdef USE_TEXT_PROPERTIES |
2004 | /* The next location where the `invisible' property changes */ | |
2005 | int next_invisible; | |
b0a0fbda RS |
2006 | #endif |
2007 | ||
31b24551 | 2008 | /* The face we're currently using. */ |
1c2250c2 | 2009 | int current_face = 0; |
efc63ef0 | 2010 | int i; |
31b24551 | 2011 | |
68a37fa8 RS |
2012 | XFASTINT (default_invis_vector[2]) = '.'; |
2013 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; | |
2014 | ||
a2889657 | 2015 | hpos += XFASTINT (w->left); |
44fa5b1e | 2016 | get_display_line (f, vpos, XFASTINT (w->left)); |
54ff581a | 2017 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 2018 | |
bd66d1ba | 2019 | /* Show where to highlight the region. */ |
1613b757 | 2020 | if (highlight_region && XMARKER (current_buffer->mark)->buffer != 0 |
fba9ce76 RS |
2021 | /* Maybe highlight only in selected window. */ |
2022 | && (highlight_nonselected_windows | |
6f139a45 | 2023 | || w == XWINDOW (selected_window))) |
bd66d1ba RS |
2024 | { |
2025 | region_beg = marker_position (current_buffer->mark); | |
2026 | if (PT < region_beg) | |
2027 | { | |
2028 | region_end = region_beg; | |
2029 | region_beg = PT; | |
2030 | } | |
2031 | else | |
2032 | region_end = PT; | |
2033 | w->region_showing = Qt; | |
2034 | } | |
2035 | else | |
2036 | region_beg = region_end = -1; | |
2037 | ||
a2889657 JB |
2038 | if (MINI_WINDOW_P (w) && start == 1 |
2039 | && vpos == XFASTINT (w->top)) | |
2040 | { | |
2041 | if (minibuf_prompt) | |
90adcf20 | 2042 | hpos = display_string (w, vpos, minibuf_prompt, -1, hpos, |
a2889657 | 2043 | (!truncate ? continuer : truncator), |
278feba9 | 2044 | 1, -1, -1); |
a2889657 JB |
2045 | minibuf_prompt_width = hpos; |
2046 | } | |
2047 | ||
2048 | desired_glyphs->bufp[vpos] = pos; | |
2049 | p1 = desired_glyphs->glyphs[vpos] + hpos; | |
efc63ef0 RS |
2050 | p1start = p1; |
2051 | charstart = desired_glyphs->charstarts[vpos] + hpos; | |
2052 | /* In case we don't ever write anything into it... */ | |
2053 | *charstart = -1; | |
a2889657 JB |
2054 | end = ZV; |
2055 | startp = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
2056 | endp = startp + width; | |
2057 | ||
1c2250c2 JB |
2058 | /* Arrange the overlays nicely for our purposes. Usually, we call |
2059 | display_text_line on only one line at a time, in which case this | |
2060 | can't really hurt too much, or we call it on lines which appear | |
2061 | one after another in the buffer, in which case all calls to | |
2062 | recenter_overlay_lists but the first will be pretty cheap. */ | |
2063 | recenter_overlay_lists (current_buffer, pos); | |
2064 | ||
a2889657 JB |
2065 | /* Loop generating characters. |
2066 | Stop at end of buffer, before newline, | |
31b24551 JB |
2067 | if reach or pass continuation column, |
2068 | or at face change. */ | |
a2889657 | 2069 | pause = pos; |
31b24551 | 2070 | next_face_change = pos; |
b0a0fbda RS |
2071 | #ifdef USE_TEXT_PROPERTIES |
2072 | next_invisible = pos; | |
2073 | #endif | |
a2889657 JB |
2074 | while (p1 < endp) |
2075 | { | |
efc63ef0 RS |
2076 | /* Record which glyph starts a character, |
2077 | and the character position of that character. */ | |
2078 | charstart[p1 - p1start] = pos; | |
2079 | ||
a2889657 | 2080 | p1prev = p1; |
31b24551 | 2081 | if (pos >= pause) |
a2889657 | 2082 | { |
31b24551 JB |
2083 | /* Did we hit the end of the visible region of the buffer? |
2084 | Stop here. */ | |
2085 | if (pos >= end) | |
a2889657 | 2086 | break; |
31b24551 JB |
2087 | |
2088 | /* Did we reach point? Record the cursor location. */ | |
a2889657 JB |
2089 | if (pos == point && cursor_vpos < 0) |
2090 | { | |
2091 | cursor_vpos = vpos; | |
2092 | cursor_hpos = p1 - startp; | |
2093 | } | |
2094 | ||
b0a0fbda RS |
2095 | #ifdef USE_TEXT_PROPERTIES |
2096 | /* if the `invisible' property is set to t, we can skip to | |
2097 | the next property change */ | |
2098 | while (pos == next_invisible && pos < end) | |
b0a0fbda | 2099 | { |
3ae8ced7 | 2100 | Lisp_Object position, limit, endpos, prop, ww; |
dfabd9a0 | 2101 | XFASTINT (position) = pos; |
3ae8ced7 KH |
2102 | XSET (ww, Lisp_Window, w); |
2103 | prop = Fget_char_property (position, Qinvisible, ww); | |
dfabd9a0 RS |
2104 | /* This is just an estimate to give reasonable |
2105 | performance; nothing should go wrong if it is too small. */ | |
fe3d6921 KH |
2106 | limit = Fnext_overlay_change (position); |
2107 | if (XFASTINT (limit) > pos + 50) | |
2108 | XFASTINT (limit) = pos + 50; | |
2109 | endpos = Fnext_single_property_change (position, Qinvisible, | |
dfabd9a0 RS |
2110 | Fcurrent_buffer (), limit); |
2111 | if (INTEGERP (endpos)) | |
2112 | next_invisible = XINT (endpos); | |
2113 | else | |
2114 | next_invisible = end; | |
2115 | if (! NILP (prop)) | |
2116 | { | |
2117 | if (pos < point && next_invisible >= point) | |
2118 | { | |
2119 | cursor_vpos = vpos; | |
2120 | cursor_hpos = p1 - startp; | |
2121 | } | |
2122 | pos = next_invisible; | |
2123 | } | |
b0a0fbda | 2124 | } |
b0a0fbda RS |
2125 | if (pos >= end) |
2126 | break; | |
2127 | #endif | |
2128 | ||
9dbd4b48 | 2129 | #ifdef HAVE_X_WINDOWS |
31b24551 JB |
2130 | /* Did we hit a face change? Figure out what face we should |
2131 | use now. We also hit this the first time through the | |
2132 | loop, to see what face we should start with. */ | |
b0a0fbda | 2133 | if (pos >= next_face_change && FRAME_X_P (f)) |
bd66d1ba RS |
2134 | current_face = compute_char_face (f, w, pos, |
2135 | region_beg, region_end, | |
efc63ef0 | 2136 | &next_face_change, pos + 50, 0); |
9dbd4b48 | 2137 | #endif |
31b24551 | 2138 | |
1c2250c2 JB |
2139 | pause = end; |
2140 | ||
b0a0fbda RS |
2141 | #ifdef USE_TEXT_PROPERTIES |
2142 | if (pos < next_invisible && next_invisible < pause) | |
2143 | pause = next_invisible; | |
2144 | #endif | |
1c2250c2 JB |
2145 | if (pos < next_face_change && next_face_change < pause) |
2146 | pause = next_face_change; | |
2147 | ||
31b24551 JB |
2148 | /* Wouldn't you hate to read the next line to someone over |
2149 | the phone? */ | |
a2889657 JB |
2150 | if (pos < point && point < pause) |
2151 | pause = point; | |
2152 | if (pos < GPT && GPT < pause) | |
2153 | pause = GPT; | |
2154 | ||
2155 | p = &FETCH_CHAR (pos); | |
2156 | } | |
2157 | c = *p++; | |
2158 | if (c >= 040 && c < 0177 | |
c581d710 | 2159 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
2160 | { |
2161 | if (p1 >= startp) | |
4cdc65eb | 2162 | *p1 = MAKE_GLYPH (f, c, current_face); |
a2889657 JB |
2163 | p1++; |
2164 | } | |
2165 | else if (c == '\n') | |
2166 | { | |
2167 | invis = 0; | |
2168 | while (pos < end | |
2169 | && selective > 0 | |
9f412332 | 2170 | && indented_beyond_p (pos + 1, selective)) |
a2889657 JB |
2171 | { |
2172 | invis = 1; | |
2173 | pos = find_next_newline (pos + 1, 1); | |
2174 | if (FETCH_CHAR (pos - 1) == '\n') | |
2175 | pos--; | |
2176 | } | |
2177 | if (invis && selective_rlen > 0 && p1 >= startp) | |
2178 | { | |
2179 | p1 += selective_rlen; | |
2180 | if (p1 - startp > width) | |
2181 | p1 = endp; | |
278feba9 | 2182 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 2183 | (p1 - p1prev), current_face); |
a2889657 | 2184 | } |
4cdc65eb | 2185 | #ifdef HAVE_X_WINDOWS |
3c5c35c5 JB |
2186 | /* Draw the face of the newline character as extending all the |
2187 | way to the end of the frame line. */ | |
2188 | if (current_face) | |
2189 | while (p1 < endp) | |
4cdc65eb | 2190 | *p1++ = FAST_MAKE_GLYPH (' ', current_face); |
3c5c35c5 | 2191 | #endif |
68a37fa8 | 2192 | break; |
a2889657 JB |
2193 | } |
2194 | else if (c == '\t') | |
2195 | { | |
2196 | do | |
2197 | { | |
2198 | if (p1 >= startp && p1 < endp) | |
4cdc65eb | 2199 | *p1 = MAKE_GLYPH (f, ' ', current_face); |
a2889657 JB |
2200 | p1++; |
2201 | } | |
2202 | while ((p1 - startp + taboffset + hscroll - (hscroll > 0)) | |
2203 | % tab_width); | |
2204 | } | |
6e8290aa | 2205 | else if (c == Ctl ('M') && selective == -1) |
a2889657 JB |
2206 | { |
2207 | pos = find_next_newline (pos, 1); | |
2208 | if (FETCH_CHAR (pos - 1) == '\n') | |
2209 | pos--; | |
2210 | if (selective_rlen > 0) | |
2211 | { | |
2212 | p1 += selective_rlen; | |
2213 | if (p1 - startp > width) | |
2214 | p1 = endp; | |
278feba9 | 2215 | copy_part_of_rope (f, p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 2216 | (p1 - p1prev), current_face); |
a2889657 | 2217 | } |
4cdc65eb | 2218 | #ifdef HAVE_X_WINDOWS |
3c5c35c5 JB |
2219 | /* Draw the face of the newline character as extending all the |
2220 | way to the end of the frame line. */ | |
2221 | if (current_face) | |
2222 | while (p1 < endp) | |
4cdc65eb | 2223 | *p1++ = FAST_MAKE_GLYPH (' ', current_face); |
3c5c35c5 | 2224 | #endif |
68a37fa8 | 2225 | break; |
a2889657 | 2226 | } |
c581d710 | 2227 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
a2889657 | 2228 | { |
278feba9 RS |
2229 | p1 = copy_part_of_rope (f, p1, startp, |
2230 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
2231 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
2232 | current_face); | |
a2889657 JB |
2233 | } |
2234 | else if (c < 0200 && ctl_arrow) | |
2235 | { | |
2236 | if (p1 >= startp) | |
278feba9 RS |
2237 | *p1 = fix_glyph (f, (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int |
2238 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
2239 | current_face); | |
a2889657 | 2240 | p1++; |
6e8290aa | 2241 | if (p1 >= startp && p1 < endp) |
4cdc65eb | 2242 | *p1 = MAKE_GLYPH (f, c ^ 0100, current_face); |
a2889657 JB |
2243 | p1++; |
2244 | } | |
2245 | else | |
2246 | { | |
2247 | if (p1 >= startp) | |
278feba9 RS |
2248 | *p1 = fix_glyph (f, (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int |
2249 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
2250 | current_face); | |
a2889657 | 2251 | p1++; |
6e8290aa | 2252 | if (p1 >= startp && p1 < endp) |
4cdc65eb | 2253 | *p1 = MAKE_GLYPH (f, (c >> 6) + '0', current_face); |
a2889657 | 2254 | p1++; |
6e8290aa | 2255 | if (p1 >= startp && p1 < endp) |
4cdc65eb | 2256 | *p1 = MAKE_GLYPH (f, (7 & (c >> 3)) + '0', current_face); |
a2889657 | 2257 | p1++; |
6e8290aa | 2258 | if (p1 >= startp && p1 < endp) |
4cdc65eb | 2259 | *p1 = MAKE_GLYPH (f, (7 & c) + '0', current_face); |
a2889657 JB |
2260 | p1++; |
2261 | } | |
31b24551 | 2262 | |
efc63ef0 RS |
2263 | /* For all the glyphs occupied by this character, except for the |
2264 | first, store -1 in charstarts. */ | |
2265 | if (p1 != p1prev) | |
2266 | { | |
2267 | int *p2x = &charstart[p1prev - p1start] + 1; | |
2268 | int *p2 = &charstart[p1 - p1start]; | |
2269 | while (p2x != p2) | |
2270 | *p2x++ = -1; | |
2271 | } | |
2272 | else | |
2273 | /* If this character took up no space, | |
2274 | erase all mention of it from charstart. */ | |
2275 | charstart[p1 - p1start] = 0; | |
a2889657 JB |
2276 | pos++; |
2277 | } | |
2278 | ||
2279 | val.hpos = - XINT (w->hscroll); | |
2280 | if (val.hpos) | |
2281 | val.hpos++; | |
2282 | ||
2283 | val.vpos = 1; | |
2284 | ||
2285 | lastpos = pos; | |
2286 | ||
efc63ef0 RS |
2287 | /* Store 0 in this charstart line for the positions where |
2288 | there is no character. But do leave what was recorded | |
2289 | for the character that ended the line. */ | |
2290 | for (i = p1 - p1start + 1; i < endp - p1start; i++) | |
2291 | charstart[i] = 0; | |
2292 | ||
a2889657 JB |
2293 | /* Handle continuation in middle of a character */ |
2294 | /* by backing up over it */ | |
2295 | if (p1 > endp) | |
2296 | { | |
5fcbb24d JB |
2297 | /* Don't back up if we never actually displayed any text. |
2298 | This occurs when the minibuffer prompt takes up the whole line. */ | |
2299 | if (p1prev) | |
2300 | { | |
2301 | /* Start the next line with that same character */ | |
2302 | pos--; | |
2303 | /* but at negative hpos, to skip the columns output on this line. */ | |
2304 | val.hpos += p1prev - endp; | |
2305 | } | |
2306 | ||
a2889657 JB |
2307 | /* Keep in this line everything up to the continuation column. */ |
2308 | p1 = endp; | |
2309 | } | |
2310 | ||
2311 | /* Finish deciding which character to start the next line on, | |
2312 | and what hpos to start it at. | |
2313 | Also set `lastpos' to the last position which counts as "on this line" | |
2314 | for cursor-positioning. */ | |
2315 | ||
2316 | if (pos < ZV) | |
2317 | { | |
2318 | if (FETCH_CHAR (pos) == '\n') | |
dd5f6267 KH |
2319 | { |
2320 | /* If stopped due to a newline, start next line after it */ | |
2321 | pos++; | |
2322 | /* Check again for hidden lines, in case the newline occurred exactly | |
2323 | at the right margin. */ | |
2324 | while (pos < ZV && selective > 0 | |
2325 | && indented_beyond_p (pos, selective)) | |
2326 | pos = find_next_newline (pos, 1); | |
2327 | } | |
a2889657 JB |
2328 | else |
2329 | /* Stopped due to right margin of window */ | |
2330 | { | |
2331 | if (truncate) | |
2332 | { | |
278feba9 | 2333 | *p1++ = fix_glyph (f, truncator, 0); |
a2889657 JB |
2334 | /* Truncating => start next line after next newline, |
2335 | and point is on this line if it is before the newline, | |
2336 | and skip none of first char of next line */ | |
dd5f6267 KH |
2337 | do |
2338 | pos = find_next_newline (pos, 1); | |
2339 | while (pos < ZV && selective > 0 | |
2340 | && indented_beyond_p (pos, selective)); | |
a2889657 JB |
2341 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; |
2342 | ||
2343 | lastpos = pos - (FETCH_CHAR (pos - 1) == '\n'); | |
2344 | } | |
2345 | else | |
2346 | { | |
278feba9 | 2347 | *p1++ = fix_glyph (f, continuer, 0); |
a2889657 JB |
2348 | val.vpos = 0; |
2349 | lastpos--; | |
2350 | } | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 2355 | record its frame location now. */ |
a2889657 JB |
2356 | |
2357 | if (start <= point && point <= lastpos && cursor_vpos < 0) | |
2358 | { | |
2359 | cursor_vpos = vpos; | |
2360 | cursor_hpos = p1 - startp; | |
2361 | } | |
2362 | ||
2363 | if (cursor_vpos == vpos) | |
2364 | { | |
2365 | if (cursor_hpos < 0) cursor_hpos = 0; | |
2366 | if (cursor_hpos > width) cursor_hpos = width; | |
2367 | cursor_hpos += XFASTINT (w->left); | |
44fa5b1e | 2368 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 2369 | { |
44fa5b1e JB |
2370 | FRAME_CURSOR_Y (f) = cursor_vpos; |
2371 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 JB |
2372 | |
2373 | if (w == XWINDOW (selected_window)) | |
2374 | { | |
2375 | /* Line is not continued and did not start | |
2376 | in middle of character */ | |
2377 | if ((hpos - XFASTINT (w->left) | |
2378 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
2379 | && val.vpos) | |
2380 | { | |
2381 | this_line_bufpos = start; | |
2382 | this_line_buffer = current_buffer; | |
2383 | this_line_vpos = cursor_vpos; | |
2384 | this_line_start_hpos = hpos; | |
2385 | this_line_endpos = Z - lastpos; | |
2386 | } | |
2387 | else | |
2388 | this_line_bufpos = 0; | |
2389 | } | |
2390 | } | |
2391 | } | |
2392 | ||
2393 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
2394 | if (hscroll && lastpos != start) | |
2395 | { | |
278feba9 | 2396 | *startp = fix_glyph (f, truncator, 0); |
a2889657 JB |
2397 | if (p1 <= startp) |
2398 | p1 = startp + 1; | |
2399 | } | |
2400 | ||
44fa5b1e | 2401 | if (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)) |
a2889657 JB |
2402 | { |
2403 | endp++; | |
2404 | if (p1 < startp) p1 = startp; | |
2405 | while (p1 < endp) *p1++ = SPACEGLYPH; | |
b1d1124b | 2406 | |
88f22aff JB |
2407 | /* Don't draw vertical bars if we're using scroll bars. They're |
2408 | covered up by the scroll bars, and it's distracting to see | |
2409 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 2410 | reconfigured. */ |
88f22aff | 2411 | *p1++ = (FRAME_HAS_VERTICAL_SCROLL_BARS (f) |
b1d1124b | 2412 | ? ' ' : '|'); |
a2889657 JB |
2413 | } |
2414 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
2415 | p1 - desired_glyphs->glyphs[vpos]); | |
2416 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2417 | ||
2418 | /* If the start of this line is the overlay arrow-position, | |
2419 | then put the arrow string into the display-line. */ | |
2420 | ||
2421 | if (XTYPE (Voverlay_arrow_position) == Lisp_Marker | |
2422 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer | |
2423 | && start == marker_position (Voverlay_arrow_position) | |
2424 | && XTYPE (Voverlay_arrow_string) == Lisp_String | |
2425 | && ! overlay_arrow_seen) | |
2426 | { | |
2427 | unsigned char *p = XSTRING (Voverlay_arrow_string)->data; | |
2428 | int i; | |
2429 | int len = XSTRING (Voverlay_arrow_string)->size; | |
142be3dd | 2430 | int arrow_end; |
a2889657 | 2431 | |
b1d1124b JB |
2432 | if (len > width) |
2433 | len = width; | |
a2889657 JB |
2434 | for (i = 0; i < len; i++) |
2435 | startp[i] = p[i]; | |
142be3dd JB |
2436 | |
2437 | /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */ | |
2438 | arrow_end = (startp - desired_glyphs->glyphs[vpos]) + len; | |
2439 | if (desired_glyphs->used[vpos] < arrow_end) | |
2440 | desired_glyphs->used[vpos] = arrow_end; | |
a2889657 JB |
2441 | |
2442 | overlay_arrow_seen = 1; | |
2443 | } | |
2444 | ||
2445 | val.bufpos = pos; | |
2446 | val_display_text_line = val; | |
2447 | return &val_display_text_line; | |
2448 | } | |
2449 | \f | |
7ce2c095 RS |
2450 | /* Redisplay the menu bar in the frame for window W. */ |
2451 | ||
2452 | static void | |
2453 | display_menu_bar (w) | |
2454 | struct window *w; | |
2455 | { | |
2456 | Lisp_Object items, tail; | |
2457 | register int vpos = 0; | |
2458 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
2459 | int maxendcol = FRAME_WIDTH (f); | |
2460 | int hpos = 0; | |
8351baf2 | 2461 | int i; |
7ce2c095 | 2462 | |
76412d64 | 2463 | #ifndef USE_X_TOOLKIT |
7ce2c095 RS |
2464 | if (FRAME_MENU_BAR_LINES (f) <= 0) |
2465 | return; | |
2466 | ||
2467 | get_display_line (f, vpos, 0); | |
2468 | ||
8351baf2 RS |
2469 | items = FRAME_MENU_BAR_ITEMS (f); |
2470 | for (i = 0; i < XVECTOR (items)->size; i += 3) | |
7ce2c095 | 2471 | { |
8351baf2 RS |
2472 | Lisp_Object pos, string; |
2473 | string = XVECTOR (items)->contents[i + 1]; | |
2474 | if (NILP (string)) | |
2475 | break; | |
2d66ad19 | 2476 | |
8351baf2 | 2477 | XFASTINT (XVECTOR (items)->contents[i + 2]) = hpos; |
7ce2c095 RS |
2478 | |
2479 | if (hpos < maxendcol) | |
2480 | hpos = display_string (XWINDOW (FRAME_ROOT_WINDOW (f)), vpos, | |
2481 | XSTRING (string)->data, | |
90adcf20 | 2482 | XSTRING (string)->size, |
278feba9 | 2483 | hpos, 0, 0, hpos, maxendcol); |
2d66ad19 RS |
2484 | /* Put a gap of 3 spaces between items. */ |
2485 | if (hpos < maxendcol) | |
2486 | { | |
2487 | int hpos1 = hpos + 3; | |
278feba9 | 2488 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, |
2d66ad19 RS |
2489 | min (hpos1, maxendcol), maxendcol); |
2490 | } | |
7ce2c095 RS |
2491 | } |
2492 | ||
2493 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
2494 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
2495 | |
2496 | /* Fill out the line with spaces. */ | |
2497 | if (maxendcol > hpos) | |
278feba9 | 2498 | hpos = display_string (w, vpos, "", 0, hpos, 0, 0, maxendcol, maxendcol); |
db6f348c JB |
2499 | |
2500 | /* Clear the rest of the lines allocated to the menu bar. */ | |
2501 | vpos++; | |
2502 | while (vpos < FRAME_MENU_BAR_LINES (f)) | |
2503 | get_display_line (f, vpos++, 0); | |
76412d64 | 2504 | #endif /* not USE_X_TOOLKIT */ |
7ce2c095 RS |
2505 | } |
2506 | \f | |
a2889657 JB |
2507 | /* Display the mode line for window w */ |
2508 | ||
2509 | static void | |
2510 | display_mode_line (w) | |
2511 | struct window *w; | |
2512 | { | |
2513 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
2514 | register int left = XFASTINT (w->left); | |
2515 | register int right = XFASTINT (w->width) + left; | |
44fa5b1e | 2516 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 2517 | |
aa6d10fa RS |
2518 | line_number_displayed = 0; |
2519 | ||
44fa5b1e | 2520 | get_display_line (f, vpos, left); |
a2889657 JB |
2521 | display_mode_element (w, vpos, left, 0, right, right, |
2522 | current_buffer->mode_line_format); | |
44fa5b1e | 2523 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 JB |
2524 | |
2525 | /* Make the mode line inverse video if the entire line | |
2526 | is made of mode lines. | |
2527 | I.e. if this window is full width, | |
2528 | or if it is the child of a full width window | |
2529 | (which implies that that window is split side-by-side | |
2530 | and the rest of this line is mode lines of the sibling windows). */ | |
44fa5b1e JB |
2531 | if (XFASTINT (w->width) == FRAME_WIDTH (f) |
2532 | || XFASTINT (XWINDOW (w->parent)->width) == FRAME_WIDTH (f)) | |
2533 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
4cdc65eb | 2534 | #ifdef HAVE_X_WINDOWS |
d7eb09a0 RS |
2535 | else if (! FRAME_TERMCAP_P (f)) |
2536 | { | |
2537 | /* For a partial width window, explicitly set face of each glyph. */ | |
2538 | int i; | |
2539 | GLYPH *ptr = FRAME_DESIRED_GLYPHS (f)->glyphs[vpos]; | |
2540 | for (i = left; i < right; ++i) | |
4cdc65eb | 2541 | ptr[i] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr[i]), 1); |
d7eb09a0 | 2542 | } |
4cdc65eb | 2543 | #endif |
a2889657 JB |
2544 | |
2545 | #ifdef HAVE_X_WINDOWS | |
96a410bc KH |
2546 | if (w == XWINDOW (f->selected_window)) |
2547 | x_consider_frame_title (WINDOW_FRAME (w)); | |
a2889657 JB |
2548 | #endif |
2549 | } | |
2550 | ||
2551 | /* Contribute ELT to the mode line for window W. | |
2552 | How it translates into text depends on its data type. | |
2553 | ||
2554 | VPOS is the position of the mode line being displayed. | |
2555 | ||
44fa5b1e | 2556 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
2557 | should start. The output is truncated automatically at the right |
2558 | edge of window W. | |
2559 | ||
2560 | DEPTH is the depth in recursion. It is used to prevent | |
2561 | infinite recursion here. | |
2562 | ||
2563 | MINENDCOL is the hpos before which the element may not end. | |
2564 | The element is padded at the right with spaces if nec | |
2565 | to reach this column. | |
2566 | ||
2567 | MAXENDCOL is the hpos past which this element may not extend. | |
2568 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
2569 | (This is necessary to make nested padding and truncation work.) | |
2570 | ||
2571 | Returns the hpos of the end of the text generated by ELT. | |
2572 | The next element will receive that value as its HPOS arg, | |
2573 | so as to concatenate the elements. */ | |
2574 | ||
2575 | static int | |
2576 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
2577 | struct window *w; | |
2578 | register int vpos, hpos; | |
2579 | int depth; | |
2580 | int minendcol; | |
2581 | register int maxendcol; | |
2582 | register Lisp_Object elt; | |
2583 | { | |
2584 | tail_recurse: | |
2585 | if (depth > 10) | |
2586 | goto invalid; | |
2587 | ||
2588 | depth++; | |
2589 | ||
2590 | #ifdef SWITCH_ENUM_BUG | |
2591 | switch ((int) XTYPE (elt)) | |
2592 | #else | |
2593 | switch (XTYPE (elt)) | |
2594 | #endif | |
2595 | { | |
2596 | case Lisp_String: | |
2597 | { | |
2598 | /* A string: output it and check for %-constructs within it. */ | |
2599 | register unsigned char c; | |
2600 | register unsigned char *this = XSTRING (elt)->data; | |
2601 | ||
2602 | while (hpos < maxendcol && *this) | |
2603 | { | |
2604 | unsigned char *last = this; | |
2605 | while ((c = *this++) != '\0' && c != '%') | |
2606 | ; | |
2607 | if (this - 1 != last) | |
2608 | { | |
2609 | register int lim = --this - last + hpos; | |
278feba9 RS |
2610 | hpos = display_string (w, vpos, last, -1, hpos, 0, 1, |
2611 | hpos, min (lim, maxendcol)); | |
a2889657 JB |
2612 | } |
2613 | else /* c == '%' */ | |
2614 | { | |
2615 | register int spec_width = 0; | |
2616 | ||
2617 | /* We can't allow -ve args due to the "%-" construct */ | |
2618 | /* Argument specifies minwidth but not maxwidth | |
2619 | (maxwidth can be specified by | |
2620 | (<negative-number> . <stuff>) mode-line elements) */ | |
2621 | ||
2622 | while ((c = *this++) >= '0' && c <= '9') | |
2623 | { | |
2624 | spec_width = spec_width * 10 + (c - '0'); | |
2625 | } | |
2626 | ||
2627 | spec_width += hpos; | |
2628 | if (spec_width > maxendcol) | |
2629 | spec_width = maxendcol; | |
2630 | ||
2631 | if (c == 'M') | |
2632 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2633 | spec_width, maxendcol, | |
2634 | Vglobal_mode_string); | |
2635 | else if (c != 0) | |
2636 | hpos = display_string (w, vpos, | |
2637 | decode_mode_spec (w, c, | |
2638 | maxendcol - hpos), | |
90adcf20 | 2639 | -1, |
278feba9 | 2640 | hpos, 0, 1, spec_width, maxendcol); |
a2889657 JB |
2641 | } |
2642 | } | |
2643 | } | |
2644 | break; | |
2645 | ||
2646 | case Lisp_Symbol: | |
2647 | /* A symbol: process the value of the symbol recursively | |
2648 | as if it appeared here directly. Avoid error if symbol void. | |
2649 | Special case: if value of symbol is a string, output the string | |
2650 | literally. */ | |
2651 | { | |
2652 | register Lisp_Object tem; | |
2653 | tem = Fboundp (elt); | |
265a9e55 | 2654 | if (!NILP (tem)) |
a2889657 JB |
2655 | { |
2656 | tem = Fsymbol_value (elt); | |
2657 | /* If value is a string, output that string literally: | |
2658 | don't check for % within it. */ | |
2659 | if (XTYPE (tem) == Lisp_String) | |
2660 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
90adcf20 | 2661 | XSTRING (tem)->size, |
278feba9 | 2662 | hpos, 0, 1, minendcol, maxendcol); |
a2889657 JB |
2663 | /* Give up right away for nil or t. */ |
2664 | else if (!EQ (tem, elt)) | |
2665 | { elt = tem; goto tail_recurse; } | |
2666 | } | |
2667 | } | |
2668 | break; | |
2669 | ||
2670 | case Lisp_Cons: | |
2671 | { | |
2672 | register Lisp_Object car, tem; | |
2673 | ||
2674 | /* A cons cell: three distinct cases. | |
2675 | If first element is a string or a cons, process all the elements | |
2676 | and effectively concatenate them. | |
2677 | If first element is a negative number, truncate displaying cdr to | |
2678 | at most that many characters. If positive, pad (with spaces) | |
2679 | to at least that many characters. | |
2680 | If first element is a symbol, process the cadr or caddr recursively | |
2681 | according to whether the symbol's value is non-nil or nil. */ | |
2682 | car = XCONS (elt)->car; | |
2683 | if (XTYPE (car) == Lisp_Symbol) | |
2684 | { | |
2685 | tem = Fboundp (car); | |
2686 | elt = XCONS (elt)->cdr; | |
2687 | if (XTYPE (elt) != Lisp_Cons) | |
2688 | goto invalid; | |
2689 | /* elt is now the cdr, and we know it is a cons cell. | |
2690 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 2691 | if (!NILP (tem)) |
a2889657 JB |
2692 | { |
2693 | tem = Fsymbol_value (car); | |
265a9e55 | 2694 | if (!NILP (tem)) |
a2889657 JB |
2695 | { elt = XCONS (elt)->car; goto tail_recurse; } |
2696 | } | |
2697 | /* Symbol's value is nil (or symbol is unbound) | |
2698 | Get the cddr of the original list | |
2699 | and if possible find the caddr and use that. */ | |
2700 | elt = XCONS (elt)->cdr; | |
265a9e55 | 2701 | if (NILP (elt)) |
a2889657 JB |
2702 | break; |
2703 | else if (XTYPE (elt) != Lisp_Cons) | |
2704 | goto invalid; | |
2705 | elt = XCONS (elt)->car; | |
2706 | goto tail_recurse; | |
2707 | } | |
2708 | else if (XTYPE (car) == Lisp_Int) | |
2709 | { | |
2710 | register int lim = XINT (car); | |
2711 | elt = XCONS (elt)->cdr; | |
2712 | if (lim < 0) | |
2713 | /* Negative int means reduce maximum width. | |
2714 | DO NOT change MINENDCOL here! | |
2715 | (20 -10 . foo) should truncate foo to 10 col | |
2716 | and then pad to 20. */ | |
2717 | maxendcol = min (maxendcol, hpos - lim); | |
2718 | else if (lim > 0) | |
2719 | { | |
2720 | /* Padding specified. Don't let it be more than | |
2721 | current maximum. */ | |
2722 | lim += hpos; | |
2723 | if (lim > maxendcol) | |
2724 | lim = maxendcol; | |
2725 | /* If that's more padding than already wanted, queue it. | |
2726 | But don't reduce padding already specified even if | |
2727 | that is beyond the current truncation point. */ | |
2728 | if (lim > minendcol) | |
2729 | minendcol = lim; | |
2730 | } | |
2731 | goto tail_recurse; | |
2732 | } | |
2733 | else if (XTYPE (car) == Lisp_String || XTYPE (car) == Lisp_Cons) | |
2734 | { | |
2735 | register int limit = 50; | |
2736 | /* LIMIT is to protect against circular lists. */ | |
2737 | while (XTYPE (elt) == Lisp_Cons && --limit > 0 | |
2738 | && hpos < maxendcol) | |
2739 | { | |
2740 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2741 | hpos, maxendcol, | |
2742 | XCONS (elt)->car); | |
2743 | elt = XCONS (elt)->cdr; | |
2744 | } | |
2745 | } | |
2746 | } | |
2747 | break; | |
2748 | ||
2749 | default: | |
2750 | invalid: | |
278feba9 | 2751 | return (display_string (w, vpos, "*invalid*", -1, hpos, 0, 1, |
a2889657 JB |
2752 | minendcol, maxendcol)); |
2753 | } | |
2754 | ||
2755 | end: | |
2756 | if (minendcol > hpos) | |
278feba9 | 2757 | hpos = display_string (w, vpos, "", 0, hpos, 0, 1, minendcol, maxendcol); |
a2889657 JB |
2758 | return hpos; |
2759 | } | |
2760 | \f | |
2761 | /* Return a string for the output of a mode line %-spec for window W, | |
2762 | generated by character C and width MAXWIDTH. */ | |
2763 | ||
11e82b76 JB |
2764 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
2765 | ||
a2889657 JB |
2766 | static char * |
2767 | decode_mode_spec (w, c, maxwidth) | |
2768 | struct window *w; | |
2769 | register char c; | |
2770 | register int maxwidth; | |
2771 | { | |
0b67772d | 2772 | Lisp_Object obj; |
44fa5b1e JB |
2773 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2774 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
a2889657 | 2775 | |
0b67772d | 2776 | obj = Qnil; |
44fa5b1e JB |
2777 | if (maxwidth > FRAME_WIDTH (f)) |
2778 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
2779 | |
2780 | switch (c) | |
2781 | { | |
2782 | case 'b': | |
2783 | obj = current_buffer->name; | |
2784 | #if 0 | |
2785 | if (maxwidth >= 3 && XSTRING (obj)->size > maxwidth) | |
2786 | { | |
2787 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
2788 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
2789 | decode_mode_spec_buf[maxwidth] = '\0'; | |
2790 | return decode_mode_spec_buf; | |
2791 | } | |
2792 | #endif | |
2793 | break; | |
2794 | ||
2795 | case 'f': | |
2796 | obj = current_buffer->filename; | |
2797 | #if 0 | |
265a9e55 | 2798 | if (NILP (obj)) |
a2889657 JB |
2799 | return "[none]"; |
2800 | else if (XTYPE (obj) == Lisp_String && XSTRING (obj)->size > maxwidth) | |
2801 | { | |
2802 | bcopy ("...", decode_mode_spec_buf, 3); | |
2803 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size - maxwidth + 3, | |
2804 | decode_mode_spec_buf + 3, maxwidth - 3); | |
2805 | return decode_mode_spec_buf; | |
2806 | } | |
2807 | #endif | |
2808 | break; | |
2809 | ||
aa6d10fa RS |
2810 | case 'l': |
2811 | { | |
2812 | int startpos = marker_position (w->start); | |
2813 | int line, linepos, topline; | |
2814 | int nlines, junk; | |
2815 | Lisp_Object tem; | |
2816 | int height = XFASTINT (w->height); | |
2817 | ||
2818 | /* If we decided that this buffer isn't suitable for line numbers, | |
2819 | don't forget that too fast. */ | |
2820 | if (EQ (w->base_line_pos, w->buffer)) | |
2821 | return "??"; | |
2822 | ||
2823 | /* If the buffer is very big, don't waste time. */ | |
2824 | if (ZV - BEGV > line_number_display_limit) | |
2825 | { | |
2826 | w->base_line_pos = Qnil; | |
2827 | w->base_line_number = Qnil; | |
2828 | return "??"; | |
2829 | } | |
2830 | ||
2831 | if (!NILP (w->base_line_number) | |
2832 | && !NILP (w->base_line_pos) | |
2833 | && XFASTINT (w->base_line_pos) <= marker_position (w->start)) | |
2834 | { | |
2835 | line = XFASTINT (w->base_line_number); | |
2836 | linepos = XFASTINT (w->base_line_pos); | |
2837 | } | |
2838 | else | |
2839 | { | |
2840 | line = 1; | |
2841 | linepos = BEGV; | |
2842 | } | |
2843 | ||
2844 | /* Count lines from base line to window start position. */ | |
2845 | nlines = display_count_lines (linepos, startpos, startpos, &junk); | |
2846 | ||
2847 | topline = nlines + line; | |
2848 | ||
2849 | /* Determine a new base line, if the old one is too close | |
2850 | or too far away, or if we did not have one. | |
2851 | "Too close" means it's plausible a scroll-down would | |
2852 | go back past it. */ | |
2853 | if (startpos == BEGV) | |
2854 | { | |
2855 | XFASTINT (w->base_line_number) = topline; | |
2856 | XFASTINT (w->base_line_pos) = BEGV; | |
2857 | } | |
2858 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
2859 | || linepos == BEGV) | |
2860 | { | |
2861 | int limit = BEGV; | |
2862 | int position; | |
2863 | int distance = (height * 2 + 30) * 200; | |
2864 | ||
2865 | if (startpos - distance > limit) | |
2866 | limit = startpos - distance; | |
2867 | ||
2868 | nlines = display_count_lines (startpos, limit, | |
2869 | -(height * 2 + 30), | |
2870 | &position); | |
2871 | /* If we couldn't find the lines we wanted within | |
2872 | 200 chars per line, | |
2873 | give up on line numbers for this window. */ | |
2874 | if (position == startpos - distance) | |
2875 | { | |
2876 | w->base_line_pos = w->buffer; | |
2877 | w->base_line_number = Qnil; | |
2878 | return "??"; | |
2879 | } | |
2880 | ||
2881 | XFASTINT (w->base_line_number) = topline - nlines; | |
2882 | XFASTINT (w->base_line_pos) = position; | |
2883 | } | |
2884 | ||
2885 | /* Now count lines from the start pos to point. */ | |
2886 | nlines = display_count_lines (startpos, PT, PT, &junk); | |
2887 | ||
2888 | /* Record that we did display the line number. */ | |
2889 | line_number_displayed = 1; | |
2890 | ||
2891 | /* Make the string to show. */ | |
2892 | sprintf (decode_mode_spec_buf, "%d", topline + nlines); | |
2893 | return decode_mode_spec_buf; | |
2894 | } | |
2895 | break; | |
2896 | ||
a2889657 JB |
2897 | case 'm': |
2898 | obj = current_buffer->mode_name; | |
2899 | break; | |
2900 | ||
2901 | case 'n': | |
2902 | if (BEGV > BEG || ZV < Z) | |
2903 | return " Narrow"; | |
2904 | break; | |
2905 | ||
2906 | case '*': | |
265a9e55 | 2907 | if (!NILP (current_buffer->read_only)) |
a2889657 JB |
2908 | return "%"; |
2909 | if (MODIFF > current_buffer->save_modified) | |
2910 | return "*"; | |
2911 | return "-"; | |
2912 | ||
5cc9f80d RS |
2913 | case '+': |
2914 | if (MODIFF > current_buffer->save_modified) | |
2915 | return "*"; | |
2916 | return "-"; | |
2917 | ||
a2889657 JB |
2918 | case 's': |
2919 | /* status of process */ | |
a2889657 | 2920 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
265a9e55 | 2921 | if (NILP (obj)) |
a2889657 | 2922 | return "no process"; |
76412d64 | 2923 | #ifdef subprocesses |
a2889657 | 2924 | obj = Fsymbol_name (Fprocess_status (obj)); |
76412d64 | 2925 | #endif |
a2889657 | 2926 | break; |
a2889657 | 2927 | |
76412d64 RS |
2928 | case 't': /* indicate TEXT or BINARY */ |
2929 | #ifdef MSDOS | |
2930 | decode_mode_spec_buf[0] | |
2931 | = NILP (current_buffer->buffer_file_type) ? "T" : "B"; | |
2932 | decode_mode_spec_buf[1] = 0; | |
2933 | return decode_mode_spec_buf; | |
2934 | #else /* not MSDOS */ | |
2935 | return "T"; | |
2936 | #endif /* not MSDOS */ | |
2937 | ||
a2889657 JB |
2938 | case 'p': |
2939 | { | |
2940 | int pos = marker_position (w->start); | |
2941 | int total = ZV - BEGV; | |
2942 | ||
2943 | if (XFASTINT (w->window_end_pos) <= Z - ZV) | |
2944 | { | |
2945 | if (pos <= BEGV) | |
2946 | return "All"; | |
2947 | else | |
2948 | return "Bottom"; | |
2949 | } | |
2950 | else if (pos <= BEGV) | |
2951 | return "Top"; | |
2952 | else | |
2953 | { | |
2954 | total = ((pos - BEGV) * 100 + total - 1) / total; | |
2955 | /* We can't normally display a 3-digit number, | |
2956 | so get us a 2-digit number that is close. */ | |
2957 | if (total == 100) | |
2958 | total = 99; | |
2959 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2960 | return decode_mode_spec_buf; | |
2961 | } | |
2962 | } | |
2963 | ||
8ffcb79f RS |
2964 | /* Display percentage of size above the bottom of the screen. */ |
2965 | case 'P': | |
2966 | { | |
2967 | int toppos = marker_position (w->start); | |
2968 | int botpos = Z - XFASTINT (w->window_end_pos); | |
2969 | int total = ZV - BEGV; | |
2970 | ||
2971 | if (botpos >= ZV) | |
2972 | { | |
2973 | if (toppos <= BEGV) | |
2974 | return "All"; | |
2975 | else | |
2976 | return "Bottom"; | |
2977 | } | |
2978 | else | |
2979 | { | |
2980 | total = ((botpos - BEGV) * 100 + total - 1) / total; | |
2981 | /* We can't normally display a 3-digit number, | |
2982 | so get us a 2-digit number that is close. */ | |
2983 | if (total == 100) | |
2984 | total = 99; | |
2985 | if (toppos <= BEGV) | |
2986 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); | |
2987 | else | |
2988 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2989 | return decode_mode_spec_buf; | |
2990 | } | |
2991 | } | |
2992 | ||
a2889657 JB |
2993 | case '%': |
2994 | return "%"; | |
2995 | ||
2996 | case '[': | |
2997 | { | |
2998 | int i; | |
2999 | char *p; | |
3000 | ||
3001 | if (command_loop_level > 5) | |
3002 | return "[[[... "; | |
3003 | p = decode_mode_spec_buf; | |
3004 | for (i = 0; i < command_loop_level; i++) | |
3005 | *p++ = '['; | |
3006 | *p = 0; | |
3007 | return decode_mode_spec_buf; | |
3008 | } | |
3009 | ||
3010 | case ']': | |
3011 | { | |
3012 | int i; | |
3013 | char *p; | |
3014 | ||
3015 | if (command_loop_level > 5) | |
3016 | return " ...]]]"; | |
3017 | p = decode_mode_spec_buf; | |
3018 | for (i = 0; i < command_loop_level; i++) | |
3019 | *p++ = ']'; | |
3020 | *p = 0; | |
3021 | return decode_mode_spec_buf; | |
3022 | } | |
3023 | ||
3024 | case '-': | |
3025 | { | |
a2889657 JB |
3026 | register char *p; |
3027 | register int i; | |
3028 | ||
3029 | if (maxwidth < sizeof (lots_of_dashes)) | |
3030 | return lots_of_dashes; | |
3031 | else | |
3032 | { | |
3033 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
3034 | *p++ = '-'; | |
3035 | *p = '\0'; | |
3036 | } | |
3037 | return decode_mode_spec_buf; | |
3038 | } | |
3039 | } | |
3040 | ||
3041 | if (XTYPE (obj) == Lisp_String) | |
3042 | return (char *) XSTRING (obj)->data; | |
3043 | else | |
3044 | return ""; | |
3045 | } | |
aa6d10fa RS |
3046 | |
3047 | /* Count up to N lines starting from FROM. | |
3048 | But don't go beyond LIMIT. | |
3049 | Return the number of lines thus found (always positive). | |
3050 | Store the position after what was found into *POS_PTR. */ | |
3051 | ||
3052 | static int | |
3053 | display_count_lines (from, limit, n, pos_ptr) | |
3054 | int from, limit, n; | |
3055 | int *pos_ptr; | |
3056 | { | |
3057 | int oldbegv = BEGV; | |
3058 | int oldzv = ZV; | |
3059 | int shortage = 0; | |
3060 | ||
3061 | if (limit < from) | |
3062 | BEGV = limit; | |
3063 | else | |
3064 | ZV = limit; | |
3065 | ||
278feba9 | 3066 | *pos_ptr = scan_buffer ('\n', from, n, &shortage, 0); |
aa6d10fa RS |
3067 | |
3068 | ZV = oldzv; | |
3069 | BEGV = oldbegv; | |
3070 | ||
3071 | if (n < 0) | |
3072 | /* When scanning backwards, scan_buffer stops *after* the last newline | |
3073 | it finds, but does count it. Compensate for that. */ | |
3074 | return - n - shortage - (*pos_ptr != limit); | |
3075 | return n - shortage; | |
3076 | } | |
a2889657 JB |
3077 | \f |
3078 | /* Display STRING on one line of window W, starting at HPOS. | |
3079 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 3080 | If VPOS == -1, display it as the current frame's title. |
90adcf20 | 3081 | LENGTH is the length of STRING, or -1 meaning STRING is null-terminated. |
a2889657 JB |
3082 | |
3083 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
3084 | ||
3085 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
3086 | MAXCOL is the last column ok to end at. Truncate here. | |
3087 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 3088 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
3089 | The right edge of W is an implicit maximum. |
3090 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
3091 | ||
278feba9 RS |
3092 | OBEY_WINDOW_WIDTH says to put spaces or vertical bars |
3093 | at the place where the current window ends in this line | |
3094 | and not display anything beyond there. Otherwise, only MAXCOL | |
3095 | controls where to stop output. | |
3096 | ||
3097 | Returns ending hpos. */ | |
a2889657 JB |
3098 | |
3099 | static int | |
278feba9 RS |
3100 | display_string (w, vpos, string, length, hpos, truncate, |
3101 | obey_window_width, mincol, maxcol) | |
a2889657 JB |
3102 | struct window *w; |
3103 | unsigned char *string; | |
90adcf20 | 3104 | int length; |
a2889657 JB |
3105 | int vpos, hpos; |
3106 | GLYPH truncate; | |
278feba9 | 3107 | int obey_window_width; |
a2889657 JB |
3108 | int mincol, maxcol; |
3109 | { | |
3110 | register int c; | |
3111 | register GLYPH *p1; | |
3112 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 3113 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
3114 | register GLYPH *start; |
3115 | register GLYPH *end; | |
b1d1124b JB |
3116 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
3117 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
3118 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
3119 | int window_width = XFASTINT (w->width); | |
3120 | ||
3121 | /* Use the standard display table, not the window's display table. | |
3122 | We don't want the mode line in rot13. */ | |
3123 | register struct Lisp_Vector *dp = 0; | |
efc63ef0 | 3124 | int i; |
a2889657 JB |
3125 | |
3126 | if (XTYPE (Vstandard_display_table) == Lisp_Vector | |
3127 | && XVECTOR (Vstandard_display_table)->size == DISP_TABLE_SIZE) | |
3128 | dp = XVECTOR (Vstandard_display_table); | |
3129 | ||
54ff581a | 3130 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
3131 | |
3132 | p1 = p1start; | |
3133 | start = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
a2889657 | 3134 | |
278feba9 | 3135 | if (obey_window_width) |
b1d1124b | 3136 | { |
278feba9 RS |
3137 | end = start + window_width - (truncate != 0); |
3138 | ||
3139 | if ((window_width + XFASTINT (w->left)) != FRAME_WIDTH (f)) | |
b1d1124b | 3140 | { |
278feba9 RS |
3141 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
3142 | { | |
3143 | int i; | |
b1d1124b | 3144 | |
278feba9 RS |
3145 | for (i = 0; i < VERTICAL_SCROLL_BAR_WIDTH; i++) |
3146 | *end-- = ' '; | |
3147 | } | |
3148 | else | |
3149 | *end-- = '|'; | |
b1d1124b | 3150 | } |
b1d1124b | 3151 | } |
a2889657 | 3152 | |
278feba9 RS |
3153 | if (! obey_window_width |
3154 | || (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol)) | |
a2889657 | 3155 | end = desired_glyphs->glyphs[vpos] + maxcol; |
278feba9 | 3156 | |
efc63ef0 RS |
3157 | /* Store 0 in charstart for these columns. */ |
3158 | for (i = hpos; i < end - p1start + hpos; i++) | |
3159 | desired_glyphs->charstarts[vpos][i] = 0; | |
3160 | ||
a2889657 JB |
3161 | if (maxcol >= 0 && mincol > maxcol) |
3162 | mincol = maxcol; | |
3163 | ||
3164 | while (p1 < end) | |
3165 | { | |
90adcf20 RS |
3166 | if (length == 0) |
3167 | break; | |
a2889657 | 3168 | c = *string++; |
90adcf20 RS |
3169 | /* Specified length. */ |
3170 | if (length >= 0) | |
3171 | length--; | |
3172 | /* Unspecified length (null-terminated string). */ | |
3173 | else if (c == 0) | |
3174 | break; | |
3175 | ||
a2889657 | 3176 | if (c >= 040 && c < 0177 |
c581d710 | 3177 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
3178 | { |
3179 | if (p1 >= start) | |
3180 | *p1 = c; | |
3181 | p1++; | |
3182 | } | |
3183 | else if (c == '\t') | |
3184 | { | |
3185 | do | |
3186 | { | |
3187 | if (p1 >= start && p1 < end) | |
3188 | *p1 = SPACEGLYPH; | |
3189 | p1++; | |
3190 | } | |
3191 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
3192 | } | |
c581d710 | 3193 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
278feba9 RS |
3194 | { |
3195 | p1 = copy_part_of_rope (f, p1, start, | |
3196 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->contents, | |
3197 | XVECTOR (DISP_CHAR_VECTOR (dp, c))->size, | |
3198 | 0); | |
3199 | } | |
ded34426 | 3200 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
3201 | { |
3202 | if (p1 >= start) | |
278feba9 RS |
3203 | *p1 = fix_glyph (f, (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int |
3204 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
3205 | 0); | |
a2889657 | 3206 | p1++; |
6e8290aa | 3207 | if (p1 >= start && p1 < end) |
a2889657 JB |
3208 | *p1 = c ^ 0100; |
3209 | p1++; | |
3210 | } | |
3211 | else | |
3212 | { | |
3213 | if (p1 >= start) | |
278feba9 RS |
3214 | *p1 = fix_glyph (f, (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int |
3215 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
3216 | 0); | |
a2889657 | 3217 | p1++; |
6e8290aa | 3218 | if (p1 >= start && p1 < end) |
a2889657 JB |
3219 | *p1 = (c >> 6) + '0'; |
3220 | p1++; | |
6e8290aa | 3221 | if (p1 >= start && p1 < end) |
a2889657 JB |
3222 | *p1 = (7 & (c >> 3)) + '0'; |
3223 | p1++; | |
6e8290aa | 3224 | if (p1 >= start && p1 < end) |
a2889657 JB |
3225 | *p1 = (7 & c) + '0'; |
3226 | p1++; | |
3227 | } | |
3228 | } | |
3229 | ||
90adcf20 | 3230 | if (c && length > 0) |
a2889657 JB |
3231 | { |
3232 | p1 = end; | |
278feba9 | 3233 | if (truncate) *p1++ = fix_glyph (f, truncate, 0); |
a2889657 JB |
3234 | } |
3235 | else if (mincol >= 0) | |
3236 | { | |
3237 | end = desired_glyphs->glyphs[vpos] + mincol; | |
3238 | while (p1 < end) | |
3239 | *p1++ = SPACEGLYPH; | |
3240 | } | |
3241 | ||
3242 | { | |
3243 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
3244 | ||
3245 | if (len > desired_glyphs->used[vpos]) | |
3246 | desired_glyphs->used[vpos] = len; | |
3247 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
3248 | ||
3249 | return len; | |
3250 | } | |
3251 | } | |
3252 | \f | |
3253 | void | |
3254 | syms_of_xdisp () | |
3255 | { | |
3256 | staticpro (&last_arrow_position); | |
3257 | staticpro (&last_arrow_string); | |
3258 | last_arrow_position = Qnil; | |
3259 | last_arrow_string = Qnil; | |
3260 | ||
3261 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 3262 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
3263 | Vglobal_mode_string = Qnil; |
3264 | ||
3265 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
3266 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
3267 | This must be the beginning of a line in order to work.\n\ | |
3268 | See also `overlay-arrow-string'."); | |
3269 | Voverlay_arrow_position = Qnil; | |
3270 | ||
3271 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
3272 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
3273 | Voverlay_arrow_string = Qnil; | |
3274 | ||
3275 | DEFVAR_INT ("scroll-step", &scroll_step, | |
3276 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
3277 | If that fails to bring point back on frame, point is centered instead.\n\ |
3278 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 JB |
3279 | |
3280 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); | |
3281 | ||
3282 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
3283 | &truncate_partial_width_windows, | |
44fa5b1e | 3284 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
3285 | truncate_partial_width_windows = 1; |
3286 | ||
3287 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
3288 | "*Non-nil means use inverse video for the mode line."); | |
3289 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
3290 | |
3291 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
3292 | "*Maximum buffer size for which line number should be displayed."); | |
3293 | line_number_display_limit = 1000000; | |
fba9ce76 RS |
3294 | |
3295 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
3296 | "*Non-nil means highlight region even in nonselected windows."); | |
3297 | highlight_nonselected_windows = 1; | |
a2889657 JB |
3298 | } |
3299 | ||
3300 | /* initialize the window system */ | |
3301 | init_xdisp () | |
3302 | { | |
3303 | Lisp_Object root_window; | |
3304 | #ifndef COMPILER_REGISTER_BUG | |
3305 | register | |
3306 | #endif /* COMPILER_REGISTER_BUG */ | |
3307 | struct window *mini_w; | |
3308 | ||
3309 | this_line_bufpos = 0; | |
3310 | ||
3311 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 3312 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
3313 | |
3314 | echo_area_glyphs = 0; | |
3315 | previous_echo_glyphs = 0; | |
3316 | ||
3317 | if (!noninteractive) | |
3318 | { | |
44fa5b1e | 3319 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
a2889657 | 3320 | XFASTINT (XWINDOW (root_window)->top) = 0; |
44fa5b1e JB |
3321 | set_window_height (root_window, FRAME_HEIGHT (f) - 1, 0); |
3322 | XFASTINT (mini_w->top) = FRAME_HEIGHT (f) - 1; | |
a2889657 JB |
3323 | set_window_height (minibuf_window, 1, 0); |
3324 | ||
44fa5b1e JB |
3325 | XFASTINT (XWINDOW (root_window)->width) = FRAME_WIDTH (f); |
3326 | XFASTINT (mini_w->width) = FRAME_WIDTH (f); | |
a2889657 JB |
3327 | } |
3328 | } |