Commit | Line | Data |
---|---|---|
a2889657 | 1 | /* Display generation from window structure and buffer text. |
c581d710 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993 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 | ||
21 | #include "config.h" | |
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" |
a2889657 JB |
36 | |
37 | extern int interrupt_input; | |
38 | extern int command_loop_level; | |
39 | ||
40 | /* Nonzero means print newline before next minibuffer message. */ | |
41 | ||
42 | int noninteractive_need_newline; | |
43 | ||
44 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
45 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
46 | ||
47 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
48 | entirely or partially on the current frame line. |
49 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
50 | static int this_line_bufpos; |
51 | ||
52 | /* Number of characters past the end of this line, | |
53 | including the terminating newline */ | |
54 | static int this_line_endpos; | |
55 | ||
44fa5b1e | 56 | /* The vertical position of this frame line. */ |
a2889657 JB |
57 | static int this_line_vpos; |
58 | ||
44fa5b1e | 59 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
60 | Usually zero, but negative if first character really began |
61 | on previous line */ | |
62 | static int this_line_start_hpos; | |
63 | ||
64 | /* Buffer that this_line variables are describing. */ | |
65 | static struct buffer *this_line_buffer; | |
66 | ||
67 | /* Set by try_window_id to the vpos of first of any lines | |
44fa5b1e | 68 | scrolled on to the bottom of the frame. These lines should |
a2889657 JB |
69 | not be included in any general scroll computation. */ |
70 | static int scroll_bottom_vpos; | |
71 | ||
72 | /* Value of echo_area_glyphs when it was last acted on. | |
44fa5b1e | 73 | If this is nonzero, there is a message on the frame |
a2889657 JB |
74 | in the minibuffer and it should be erased as soon |
75 | as it is no longer requested to appear. */ | |
76 | char *previous_echo_glyphs; | |
77 | ||
44fa5b1e | 78 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
79 | int truncate_partial_width_windows; |
80 | ||
81 | Lisp_Object Vglobal_mode_string; | |
82 | ||
83 | /* Marker for where to display an arrow on top of the buffer text. */ | |
84 | Lisp_Object Voverlay_arrow_position; | |
85 | ||
86 | /* String to display for the arrow. */ | |
87 | Lisp_Object Voverlay_arrow_string; | |
88 | ||
89 | /* Values of those variables at last redisplay. */ | |
ded34426 | 90 | static Lisp_Object last_arrow_position, last_arrow_string; |
a2889657 JB |
91 | |
92 | /* Nonzero if overlay arrow has been displayed once in this window. */ | |
93 | static int overlay_arrow_seen; | |
94 | ||
44fa5b1e | 95 | /* If cursor motion alone moves point off frame, |
a2889657 JB |
96 | Try scrolling this many lines up or down if that will bring it back. */ |
97 | int scroll_step; | |
98 | ||
99 | /* Nonzero if try_window_id has made blank lines at window bottom | |
100 | since the last redisplay that paused */ | |
101 | static int blank_end_of_window; | |
102 | ||
103 | /* Number of windows showing the buffer of the selected window. | |
104 | keyboard.c refers to this. */ | |
105 | int buffer_shared; | |
106 | ||
44fa5b1e | 107 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
108 | whether the window is selected or not. |
109 | Set one to -1 first to determine whether point was found afterwards. */ | |
110 | ||
111 | static int cursor_vpos; | |
112 | static int cursor_hpos; | |
113 | ||
114 | int debug_end_pos; | |
115 | ||
116 | /* Nonzero means display mode line highlighted */ | |
117 | int mode_line_inverse_video; | |
118 | ||
119 | static void echo_area_display (); | |
120 | void mark_window_display_accurate (); | |
121 | static void redisplay_windows (); | |
122 | static void redisplay_window (); | |
123 | static void try_window (); | |
124 | static int try_window_id (); | |
125 | static struct position *display_text_line (); | |
126 | static void display_mode_line (); | |
127 | static int display_mode_element (); | |
128 | static char *fmodetrunc (); | |
129 | static char *decode_mode_spec (); | |
130 | static int display_string (); | |
7ce2c095 | 131 | static void display_menu_bar (); |
aa6d10fa | 132 | static int display_count_lines (); |
a2889657 JB |
133 | |
134 | /* Prompt to display in front of the minibuffer contents */ | |
135 | char *minibuf_prompt; | |
136 | ||
137 | /* Width in columns of current minibuffer prompt. */ | |
138 | int minibuf_prompt_width; | |
139 | ||
140 | /* Message to display instead of minibuffer contents | |
141 | This is what the functions error and message make, | |
142 | and command echoing uses it as well. | |
143 | It overrides the minibuf_prompt as well as the buffer. */ | |
144 | char *echo_area_glyphs; | |
145 | ||
146 | /* true iff we should redraw the mode lines on the next redisplay */ | |
147 | int update_mode_lines; | |
148 | ||
149 | /* Smallest number of characters before the gap | |
150 | at any time since last redisplay that finished. | |
151 | Valid for current buffer when try_window_id can be called. */ | |
152 | int beg_unchanged; | |
153 | ||
154 | /* Smallest number of characters after the gap | |
155 | at any time since last redisplay that finished. | |
156 | Valid for current buffer when try_window_id can be called. */ | |
157 | int end_unchanged; | |
158 | ||
159 | /* MODIFF as of last redisplay that finished; | |
160 | if it matches MODIFF, beg_unchanged and end_unchanged | |
161 | contain no useful information */ | |
162 | int unchanged_modified; | |
163 | ||
164 | /* Nonzero if head_clip or tail_clip of current buffer has changed | |
165 | since last redisplay that finished */ | |
166 | int clip_changed; | |
167 | ||
168 | /* Nonzero if window sizes or contents have changed | |
169 | since last redisplay that finished */ | |
170 | int windows_or_buffers_changed; | |
171 | ||
aa6d10fa RS |
172 | /* Nonzero after display_mode_line if %l was used |
173 | and it displayed a line number. */ | |
174 | int line_number_displayed; | |
175 | ||
176 | /* Maximum buffer size for which to display line numbers. */ | |
177 | int line_number_display_limit; | |
a2889657 | 178 | \f |
ded34426 JB |
179 | /* Specify m, a string, as a message in the minibuf. If m is 0, clear out |
180 | any existing message, and let the minibuffer text show through. */ | |
181 | void | |
182 | message1 (m) | |
183 | char *m; | |
184 | { | |
185 | if (noninteractive) | |
186 | { | |
187 | if (noninteractive_need_newline) | |
188 | putc ('\n', stderr); | |
189 | noninteractive_need_newline = 0; | |
c4f14ccb RS |
190 | if (cursor_in_echo_area != 0) |
191 | fprintf (stderr, "%s", m); | |
192 | else | |
193 | fprintf (stderr, "%s\n", m); | |
ded34426 JB |
194 | fflush (stderr); |
195 | } | |
196 | /* A null message buffer means that the frame hasn't really been | |
197 | initialized yet. Error messages get reported properly by | |
198 | cmd_error, so this must be just an informative message; toss it. */ | |
199 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
200 | { | |
201 | #ifdef MULTI_FRAME | |
202 | Lisp_Object minibuf_frame; | |
203 | ||
204 | choose_minibuf_frame (); | |
205 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); | |
d724d989 | 206 | FRAME_SAMPLE_VISIBILITY (XFRAME (minibuf_frame)); |
ded34426 JB |
207 | if (FRAME_VISIBLE_P (selected_frame) |
208 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
209 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
210 | #endif | |
211 | ||
212 | if (m) | |
213 | echo_area_glyphs = m; | |
214 | else | |
215 | echo_area_glyphs = previous_echo_glyphs = 0; | |
216 | ||
217 | do_pending_window_change (); | |
218 | echo_area_display (); | |
219 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); | |
220 | do_pending_window_change (); | |
221 | } | |
222 | } | |
223 | ||
44fa5b1e | 224 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
225 | zero if being used by message. */ |
226 | int message_buf_print; | |
227 | ||
81d478f3 JB |
228 | /* Dump an informative message to the minibuf. If m is 0, clear out |
229 | any existing message, and let the minibuffer text show through. */ | |
a2889657 | 230 | /* VARARGS 1 */ |
a2889657 JB |
231 | void |
232 | message (m, a1, a2, a3) | |
233 | char *m; | |
234 | { | |
235 | if (noninteractive) | |
236 | { | |
81d478f3 JB |
237 | if (m) |
238 | { | |
239 | if (noninteractive_need_newline) | |
240 | putc ('\n', stderr); | |
241 | noninteractive_need_newline = 0; | |
242 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
243 | if (cursor_in_echo_area == 0) |
244 | fprintf (stderr, "\n"); | |
81d478f3 JB |
245 | fflush (stderr); |
246 | } | |
a2889657 | 247 | } |
1f40cad2 | 248 | else if (INTERACTIVE) |
a2889657 | 249 | { |
1f40cad2 JB |
250 | /* The frame whose minibuffer we're going to display the message on. |
251 | It may be larger than the selected frame, so we need | |
252 | to use its buffer, not the selected frame's buffer. */ | |
253 | FRAME_PTR echo_frame; | |
254 | #ifdef MULTI_FRAME | |
255 | choose_minibuf_frame (); | |
256 | echo_frame = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
257 | #else | |
258 | echo_frame = selected_frame; | |
259 | #endif | |
260 | ||
261 | /* A null message buffer means that the frame hasn't really been | |
262 | initialized yet. Error messages get reported properly by | |
263 | cmd_error, so this must be just an informative message; toss it. */ | |
264 | if (FRAME_MESSAGE_BUF (echo_frame)) | |
81d478f3 | 265 | { |
1f40cad2 JB |
266 | if (m) |
267 | { | |
268 | { | |
a2889657 | 269 | #ifdef NO_ARG_ARRAY |
1f40cad2 JB |
270 | int a[3]; |
271 | a[0] = a1; | |
272 | a[1] = a2; | |
273 | a[2] = a3; | |
a2889657 | 274 | |
1f40cad2 JB |
275 | doprnt (FRAME_MESSAGE_BUF (echo_frame), |
276 | FRAME_WIDTH (echo_frame), m, 0, 3, a); | |
a2889657 | 277 | #else |
1f40cad2 JB |
278 | doprnt (FRAME_MESSAGE_BUF (echo_frame), |
279 | FRAME_WIDTH (echo_frame), m, 0, 3, &a1); | |
280 | #endif /* NO_ARG_ARRAY */ | |
281 | } | |
282 | ||
283 | message1 (FRAME_MESSAGE_BUF (echo_frame)); | |
284 | } | |
285 | else | |
286 | message1 (0); | |
287 | ||
288 | /* Print should start at the beginning of the message | |
289 | buffer next time. */ | |
290 | message_buf_print = 0; | |
81d478f3 | 291 | } |
a2889657 JB |
292 | } |
293 | } | |
294 | ||
295 | static void | |
296 | echo_area_display () | |
297 | { | |
298 | register int vpos; | |
44fa5b1e | 299 | FRAME_PTR f; |
a2889657 | 300 | |
44fa5b1e JB |
301 | #ifdef MULTI_FRAME |
302 | choose_minibuf_frame (); | |
b1d1124b JB |
303 | #endif |
304 | ||
44fa5b1e | 305 | f = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); |
a2889657 | 306 | |
44fa5b1e | 307 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 308 | return; |
a2889657 | 309 | |
44fa5b1e | 310 | if (frame_garbaged) |
a2889657 JB |
311 | { |
312 | Fredraw_display (); | |
44fa5b1e | 313 | frame_garbaged = 0; |
a2889657 JB |
314 | } |
315 | ||
316 | if (echo_area_glyphs || minibuf_level == 0) | |
317 | { | |
318 | vpos = XFASTINT (XWINDOW (minibuf_window)->top); | |
44fa5b1e | 319 | get_display_line (f, vpos, 0); |
a2889657 JB |
320 | display_string (XWINDOW (minibuf_window), vpos, |
321 | echo_area_glyphs ? echo_area_glyphs : "", | |
44fa5b1e | 322 | 0, 0, 0, FRAME_WIDTH (f)); |
a2889657 JB |
323 | |
324 | /* If desired cursor location is on this line, put it at end of text */ | |
44fa5b1e JB |
325 | if (FRAME_CURSOR_Y (f) == vpos) |
326 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
daa37602 JB |
327 | |
328 | /* Fill the rest of the minibuffer window with blank lines. */ | |
329 | { | |
330 | int i; | |
331 | ||
332 | for (i = vpos + 1; i < vpos + XWINDOW (minibuf_window)->height; i++) | |
333 | { | |
44fa5b1e | 334 | get_display_line (f, i, 0); |
daa37602 | 335 | display_string (XWINDOW (minibuf_window), vpos, |
44fa5b1e | 336 | "", 0, 0, 0, FRAME_WIDTH (f)); |
daa37602 JB |
337 | } |
338 | } | |
a2889657 JB |
339 | } |
340 | else if (!EQ (minibuf_window, selected_window)) | |
341 | windows_or_buffers_changed++; | |
342 | ||
343 | if (EQ (minibuf_window, selected_window)) | |
344 | this_line_bufpos = 0; | |
345 | ||
346 | previous_echo_glyphs = echo_area_glyphs; | |
347 | } | |
348 | \f | |
44fa5b1e | 349 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
350 | This is the main external entry point for redisplay. |
351 | ||
352 | If the last redisplay displayed an echo area message and that | |
353 | message is no longer requested, we clear the echo area | |
354 | or bring back the minibuffer if that is in use. | |
355 | ||
356 | Everyone would like to have a hook here to call eval, | |
357 | but that cannot be done safely without a lot of changes elsewhere. | |
358 | This can be called from signal handlers; with alarms set up; | |
359 | or with synchronous processes running. | |
360 | See the function `echo' in keyboard.c. | |
361 | See Fcall_process; if you called it from here, it could be | |
362 | entered recursively. */ | |
363 | ||
364 | void | |
365 | redisplay () | |
366 | { | |
367 | register struct window *w = XWINDOW (selected_window); | |
368 | register int pause; | |
369 | int must_finish = 0; | |
370 | int all_windows; | |
371 | register int tlbufpos, tlendpos; | |
372 | struct position pos; | |
373 | extern int input_pending; | |
374 | ||
375 | if (noninteractive) | |
376 | return; | |
377 | ||
d724d989 JB |
378 | /* Set the visible flags for all frames. |
379 | Do this before checking for resized or garbaged frames; they want | |
380 | to know if their frames are visible. | |
381 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
382 | { | |
35f56f96 | 383 | Lisp_Object tail, frame; |
d724d989 | 384 | |
35f56f96 JB |
385 | FOR_EACH_FRAME (tail, frame) |
386 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
d724d989 JB |
387 | } |
388 | ||
44fa5b1e | 389 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
390 | do_pending_window_change (); |
391 | ||
44fa5b1e | 392 | if (frame_garbaged) |
a2889657 JB |
393 | { |
394 | Fredraw_display (); | |
44fa5b1e | 395 | frame_garbaged = 0; |
a2889657 JB |
396 | } |
397 | ||
6e8290aa | 398 | /* Normally the message* functions will have already displayed and |
44fa5b1e | 399 | updated the echo area, but the frame may have been trashed, or |
6e8290aa JB |
400 | the update may have been preempted, so display the echo area |
401 | again here. */ | |
a2889657 JB |
402 | if (echo_area_glyphs || previous_echo_glyphs) |
403 | { | |
404 | echo_area_display (); | |
405 | must_finish = 1; | |
406 | } | |
407 | ||
408 | if (clip_changed || windows_or_buffers_changed) | |
409 | update_mode_lines++; | |
410 | ||
411 | /* Detect case that we need to write a star in the mode line. */ | |
412 | if (XFASTINT (w->last_modified) < MODIFF | |
413 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
414 | { | |
415 | w->update_mode_line = Qt; | |
416 | if (buffer_shared > 1) | |
417 | update_mode_lines++; | |
418 | } | |
419 | ||
44fa5b1e | 420 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
421 | |
422 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
423 | |
424 | /* If specs for an arrow have changed, do thorough redisplay | |
425 | to ensure we remove any arrow that should no longer exist. */ | |
ded34426 JB |
426 | if (! EQ (Voverlay_arrow_position, last_arrow_position) |
427 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
a2889657 JB |
428 | all_windows = 1, clip_changed = 1; |
429 | ||
bd66d1ba RS |
430 | /* If showing region, and mark has changed, must redisplay whole window. */ |
431 | if (((!NILP (Vtransient_mark_mode) | |
432 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
433 | != !NILP (w->region_showing)) | |
434 | || !EQ (w->region_showing, | |
435 | Fmarker_position (XBUFFER (w->buffer)->mark))) | |
436 | this_line_bufpos = -1; | |
437 | ||
a2889657 JB |
438 | tlbufpos = this_line_bufpos; |
439 | tlendpos = this_line_endpos; | |
265a9e55 | 440 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
44fa5b1e | 441 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
a2889657 JB |
442 | /* Make sure recorded data applies to current buffer, etc */ |
443 | && this_line_buffer == current_buffer | |
444 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 445 | && NILP (w->force_start) |
a2889657 JB |
446 | /* Point must be on the line that we have info recorded about */ |
447 | && point >= tlbufpos | |
448 | && point <= Z - tlendpos | |
449 | /* All text outside that line, including its final newline, | |
450 | must be unchanged */ | |
451 | && (XFASTINT (w->last_modified) >= MODIFF | |
452 | || (beg_unchanged >= tlbufpos - 1 | |
453 | && GPT >= tlbufpos | |
05ba02eb JB |
454 | /* If selective display, can't optimize |
455 | if the changes start at the beginning of the line. */ | |
456 | && ((XTYPE (current_buffer->selective_display) == Lisp_Int | |
457 | && XINT (current_buffer->selective_display) > 0 | |
458 | ? (beg_unchanged >= tlbufpos | |
459 | && GPT > tlbufpos) | |
460 | : 1)) | |
a2889657 JB |
461 | && end_unchanged >= tlendpos |
462 | && Z - GPT >= tlendpos))) | |
463 | { | |
464 | if (tlbufpos > BEGV && FETCH_CHAR (tlbufpos - 1) != '\n' | |
465 | && (tlbufpos == ZV | |
466 | || FETCH_CHAR (tlbufpos) == '\n')) | |
467 | /* Former continuation line has disappeared by becoming empty */ | |
468 | goto cancel; | |
469 | else if (XFASTINT (w->last_modified) < MODIFF | |
470 | || MINI_WINDOW_P (w)) | |
471 | { | |
472 | cursor_vpos = -1; | |
473 | overlay_arrow_seen = 0; | |
474 | display_text_line (w, tlbufpos, this_line_vpos, this_line_start_hpos, | |
475 | pos_tab_offset (w, tlbufpos)); | |
476 | /* If line contains point, is not continued, | |
477 | and ends at same distance from eob as before, we win */ | |
478 | if (cursor_vpos >= 0 && this_line_bufpos | |
479 | && this_line_endpos == tlendpos) | |
480 | { | |
44fa5b1e | 481 | if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
482 | preserve_other_columns (w); |
483 | goto update; | |
484 | } | |
485 | else | |
486 | goto cancel; | |
487 | } | |
488 | else if (point == XFASTINT (w->last_point)) | |
489 | { | |
490 | if (!must_finish) | |
491 | { | |
492 | do_pending_window_change (); | |
493 | return; | |
494 | } | |
495 | goto update; | |
496 | } | |
bd66d1ba RS |
497 | /* If highlighting the region, we can't just move the cursor. */ |
498 | else if (! (!NILP (Vtransient_mark_mode) | |
499 | && !NILP (current_buffer->mark_active)) | |
500 | && NILP (w->region_showing)) | |
a2889657 JB |
501 | { |
502 | pos = *compute_motion (tlbufpos, 0, | |
503 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
504 | point, 2, - (1 << (SHORTBITS - 1)), | |
b1d1124b | 505 | window_internal_width (w) - 1, |
de3e8b15 JB |
506 | XINT (w->hscroll), |
507 | pos_tab_offset (w, tlbufpos)); | |
a2889657 JB |
508 | if (pos.vpos < 1) |
509 | { | |
44fa5b1e | 510 | FRAME_CURSOR_X (selected_frame) |
a2889657 | 511 | = XFASTINT (w->left) + max (pos.hpos, 0); |
44fa5b1e | 512 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
513 | goto update; |
514 | } | |
515 | else | |
516 | goto cancel; | |
517 | } | |
518 | cancel: | |
519 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 520 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
521 | } |
522 | ||
523 | this_line_bufpos = 0; | |
524 | all_windows |= buffer_shared > 1; | |
525 | ||
526 | if (all_windows) | |
527 | { | |
35f56f96 | 528 | Lisp_Object tail, frame; |
a2889657 | 529 | |
31b24551 JB |
530 | #ifdef HAVE_X_WINDOWS |
531 | /* Since we're doing a thorough redisplay, we might as well | |
532 | recompute all our display faces. */ | |
533 | clear_face_vector (); | |
534 | #endif | |
535 | ||
a2889657 | 536 | /* Recompute # windows showing selected buffer. |
8de2d90b | 537 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
538 | buffer_shared = 0; |
539 | ||
35f56f96 | 540 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 541 | { |
35f56f96 JB |
542 | FRAME_PTR f = XFRAME (frame); |
543 | ||
88f22aff | 544 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
30c566e4 | 545 | we want when we redisplay their windows. */ |
88f22aff JB |
546 | if (condemn_scroll_bars_hook) |
547 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 JB |
548 | |
549 | if (FRAME_VISIBLE_P (f)) | |
550 | redisplay_windows (FRAME_ROOT_WINDOW (f)); | |
551 | ||
88f22aff | 552 | /* Any scroll bars which redisplay_windows should have nuked |
30c566e4 | 553 | should now go away. */ |
88f22aff JB |
554 | if (judge_scroll_bars_hook) |
555 | (*judge_scroll_bars_hook) (f); | |
30c566e4 | 556 | } |
a2889657 | 557 | } |
44fa5b1e | 558 | else if (FRAME_VISIBLE_P (selected_frame)) |
a2889657 JB |
559 | { |
560 | redisplay_window (selected_window, 1); | |
44fa5b1e | 561 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
562 | preserve_other_columns (w); |
563 | } | |
564 | ||
565 | update: | |
566 | /* Prevent various kinds of signals during display update. | |
567 | stdio is not robust about handling signals, | |
568 | which can cause an apparent I/O error. */ | |
569 | if (interrupt_input) | |
570 | unrequest_sigio (); | |
571 | stop_polling (); | |
572 | ||
44fa5b1e | 573 | #ifdef MULTI_FRAME |
a2889657 JB |
574 | if (all_windows) |
575 | { | |
576 | Lisp_Object tail; | |
577 | ||
578 | pause = 0; | |
579 | ||
44fa5b1e | 580 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 581 | { |
44fa5b1e | 582 | FRAME_PTR f; |
a2889657 | 583 | |
44fa5b1e | 584 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
585 | continue; |
586 | ||
44fa5b1e | 587 | f = XFRAME (XCONS (tail)->car); |
30c566e4 | 588 | if (FRAME_VISIBLE_P (f)) |
a2889657 | 589 | { |
44fa5b1e | 590 | pause |= update_frame (f, 0, 0); |
a2889657 | 591 | if (!pause) |
44fa5b1e | 592 | mark_window_display_accurate (f->root_window, 1); |
a2889657 JB |
593 | } |
594 | } | |
595 | } | |
596 | else | |
44fa5b1e | 597 | #endif /* MULTI_FRAME */ |
6e8290aa | 598 | { |
44fa5b1e JB |
599 | if (FRAME_VISIBLE_P (selected_frame)) |
600 | pause = update_frame (selected_frame, 0, 0); | |
d724d989 | 601 | |
8de2d90b | 602 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
603 | function. If the echo area is on another frame, that may |
604 | have put text on a frame other than the selected one, so the | |
605 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
606 | it here. */ |
607 | { | |
44fa5b1e JB |
608 | FRAME_PTR mini_frame = |
609 | XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b | 610 | |
44fa5b1e JB |
611 | if (mini_frame != selected_frame) |
612 | pause |= update_frame (mini_frame, 0, 0); | |
8de2d90b | 613 | } |
6e8290aa | 614 | } |
a2889657 | 615 | |
44fa5b1e | 616 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
617 | Also, don't forget to check every line to update the arrow. */ |
618 | if (pause) | |
619 | { | |
620 | this_line_bufpos = 0; | |
265a9e55 | 621 | if (!NILP (last_arrow_position)) |
a2889657 JB |
622 | { |
623 | last_arrow_position = Qt; | |
624 | last_arrow_string = Qt; | |
625 | } | |
44fa5b1e | 626 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
627 | may be null, so preserve_other_columns won't be able to |
628 | preserve all the vertical-bar separators. So, avoid using it | |
629 | in that case. */ | |
44fa5b1e | 630 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
631 | update_mode_lines = 1; |
632 | } | |
633 | ||
44fa5b1e | 634 | /* Now text on frame agrees with windows, so |
a2889657 JB |
635 | put info into the windows for partial redisplay to follow */ |
636 | ||
637 | if (!pause) | |
638 | { | |
639 | register struct buffer *b = XBUFFER (w->buffer); | |
640 | ||
641 | blank_end_of_window = 0; | |
642 | clip_changed = 0; | |
643 | unchanged_modified = BUF_MODIFF (b); | |
644 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); | |
645 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
646 | ||
647 | XFASTINT (w->last_point) = BUF_PT (b); | |
44fa5b1e JB |
648 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (selected_frame); |
649 | XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame); | |
a2889657 JB |
650 | |
651 | if (all_windows) | |
11e82b76 | 652 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
653 | else |
654 | { | |
655 | w->update_mode_line = Qnil; | |
656 | XFASTINT (w->last_modified) = BUF_MODIFF (b); | |
657 | w->window_end_valid = Qt; | |
658 | last_arrow_position = Voverlay_arrow_position; | |
659 | last_arrow_string = Voverlay_arrow_string; | |
660 | } | |
661 | update_mode_lines = 0; | |
662 | windows_or_buffers_changed = 0; | |
663 | } | |
664 | ||
665 | /* Start SIGIO interrupts coming again. | |
666 | Having them off during the code above | |
667 | makes it less likely one will discard output, | |
668 | but not impossible, since there might be stuff | |
669 | in the system buffer here. | |
670 | But it is much hairier to try to do anything about that. */ | |
671 | ||
672 | if (interrupt_input) | |
673 | request_sigio (); | |
674 | start_polling (); | |
675 | ||
44fa5b1e | 676 | /* Change frame size now if a change is pending. */ |
a2889657 JB |
677 | do_pending_window_change (); |
678 | } | |
679 | ||
680 | /* Redisplay, but leave alone any recent echo area message | |
681 | unless another message has been requested in its place. | |
682 | ||
683 | This is useful in situations where you need to redisplay but no | |
684 | user action has occurred, making it inappropriate for the message | |
685 | area to be cleared. See tracking_off and | |
686 | wait_reading_process_input for examples of these situations. */ | |
687 | ||
688 | redisplay_preserve_echo_area () | |
689 | { | |
690 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
691 | { | |
692 | echo_area_glyphs = previous_echo_glyphs; | |
693 | redisplay (); | |
694 | echo_area_glyphs = 0; | |
695 | } | |
696 | else | |
697 | redisplay (); | |
698 | } | |
699 | ||
700 | void | |
701 | mark_window_display_accurate (window, flag) | |
702 | Lisp_Object window; | |
703 | int flag; | |
704 | { | |
705 | register struct window *w; | |
706 | ||
265a9e55 | 707 | for (;!NILP (window); window = w->next) |
a2889657 | 708 | { |
ded34426 | 709 | if (XTYPE (window) != Lisp_Window) abort (); |
a2889657 JB |
710 | w = XWINDOW (window); |
711 | ||
265a9e55 | 712 | if (!NILP (w->buffer)) |
bd66d1ba RS |
713 | { |
714 | XFASTINT (w->last_modified) | |
715 | = !flag ? 0 | |
716 | : XBUFFER (w->buffer) == current_buffer | |
717 | ? MODIFF : BUF_MODIFF (XBUFFER (w->buffer)); | |
718 | ||
719 | /* Record if we are showing a region, so can make sure to | |
720 | update it fully at next redisplay. */ | |
721 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
722 | && !NILP (XBUFFER (w->buffer)->mark_active) | |
723 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
724 | : Qnil); | |
725 | } | |
726 | ||
a2889657 JB |
727 | w->window_end_valid = Qt; |
728 | w->update_mode_line = Qnil; | |
729 | ||
265a9e55 | 730 | if (!NILP (w->vchild)) |
a2889657 | 731 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 732 | if (!NILP (w->hchild)) |
a2889657 JB |
733 | mark_window_display_accurate (w->hchild, flag); |
734 | } | |
735 | ||
736 | if (flag) | |
737 | { | |
738 | last_arrow_position = Voverlay_arrow_position; | |
739 | last_arrow_string = Voverlay_arrow_string; | |
740 | } | |
741 | else | |
742 | { | |
743 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
744 | last_arrow_position = Qt; | |
745 | last_arrow_string = Qt; | |
746 | } | |
747 | } | |
748 | \f | |
749 | int do_id = 1; | |
750 | ||
751 | static void | |
752 | redisplay_windows (window) | |
753 | Lisp_Object window; | |
754 | { | |
265a9e55 | 755 | for (; !NILP (window); window = XWINDOW (window)->next) |
a2889657 JB |
756 | redisplay_window (window, 0); |
757 | } | |
758 | ||
759 | static void | |
760 | redisplay_window (window, just_this_one) | |
761 | Lisp_Object window; | |
762 | int just_this_one; | |
763 | { | |
764 | register struct window *w = XWINDOW (window); | |
30c566e4 | 765 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 JB |
766 | int height; |
767 | register int lpoint = point; | |
768 | struct buffer *old = current_buffer; | |
b1d1124b | 769 | register int width = window_internal_width (w) - 1; |
a2889657 JB |
770 | register int startp; |
771 | register int hscroll = XINT (w->hscroll); | |
772 | struct position pos; | |
b1d1124b | 773 | int opoint = point; |
a2889657 JB |
774 | int tem; |
775 | int window_needs_modeline; | |
776 | ||
44fa5b1e | 777 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
778 | |
779 | /* If this is a combination window, do its children; that's all. */ | |
780 | ||
265a9e55 | 781 | if (!NILP (w->vchild)) |
a2889657 JB |
782 | { |
783 | redisplay_windows (w->vchild); | |
784 | return; | |
785 | } | |
265a9e55 | 786 | if (!NILP (w->hchild)) |
a2889657 JB |
787 | { |
788 | redisplay_windows (w->hchild); | |
789 | return; | |
790 | } | |
265a9e55 | 791 | if (NILP (w->buffer)) |
a2889657 | 792 | abort (); |
8de2d90b JB |
793 | |
794 | height = window_internal_height (w); | |
795 | ||
796 | if (MINI_WINDOW_P (w)) | |
797 | { | |
798 | if (w == XWINDOW (minibuf_window)) | |
799 | { | |
800 | if (echo_area_glyphs) | |
801 | /* We've already displayed the echo area glyphs, if any. */ | |
88f22aff | 802 | goto finish_scroll_bars; |
8de2d90b JB |
803 | } |
804 | else | |
805 | { | |
806 | /* This is a minibuffer, but it's not the currently active one, so | |
807 | clear it. */ | |
44fa5b1e | 808 | int vpos = XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
8de2d90b JB |
809 | int i; |
810 | ||
811 | for (i = 0; i < height; i++) | |
812 | { | |
44fa5b1e | 813 | get_display_line (f, vpos + i, 0); |
8de2d90b JB |
814 | display_string (w, vpos + i, "", 0, 0, 0, width); |
815 | } | |
816 | ||
88f22aff | 817 | goto finish_scroll_bars; |
8de2d90b JB |
818 | } |
819 | } | |
a2889657 JB |
820 | |
821 | if (update_mode_lines) | |
822 | w->update_mode_line = Qt; | |
823 | ||
824 | /* Otherwise set up data on this window; select its buffer and point value */ | |
825 | ||
a2889657 JB |
826 | current_buffer = XBUFFER (w->buffer); |
827 | opoint = point; | |
828 | ||
829 | /* Count number of windows showing the selected buffer. */ | |
830 | ||
831 | if (!just_this_one | |
832 | && current_buffer == XBUFFER (XWINDOW (selected_window)->buffer)) | |
833 | buffer_shared++; | |
834 | ||
835 | /* POINT refers normally to the selected window. | |
836 | For any other window, set up appropriate value. */ | |
837 | ||
838 | if (!EQ (window, selected_window)) | |
839 | { | |
840 | SET_PT (marker_position (w->pointm)); | |
841 | if (point < BEGV) | |
842 | { | |
265a9e55 | 843 | SET_PT (BEGV); |
a2889657 JB |
844 | Fset_marker (w->pointm, make_number (point), Qnil); |
845 | } | |
846 | else if (point > (ZV - 1)) | |
847 | { | |
265a9e55 | 848 | SET_PT (ZV); |
a2889657 JB |
849 | Fset_marker (w->pointm, make_number (point), Qnil); |
850 | } | |
851 | } | |
852 | ||
853 | /* If window-start is screwed up, choose a new one. */ | |
a2889657 JB |
854 | if (XMARKER (w->start)->buffer != current_buffer) |
855 | goto recenter; | |
856 | ||
857 | startp = marker_position (w->start); | |
858 | ||
8de2d90b | 859 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 860 | unless the specified location is outside the accessible range. */ |
265a9e55 | 861 | if (!NILP (w->force_start)) |
a2889657 | 862 | { |
aa6d10fa RS |
863 | /* Forget any recorded base line for line number display. */ |
864 | w->base_line_number = Qnil; | |
a2889657 JB |
865 | w->update_mode_line = Qt; |
866 | w->force_start = Qnil; | |
867 | XFASTINT (w->last_modified) = 0; | |
8de2d90b JB |
868 | if (startp < BEGV) startp = BEGV; |
869 | if (startp > ZV) startp = ZV; | |
a2889657 JB |
870 | try_window (window, startp); |
871 | if (cursor_vpos < 0) | |
872 | { | |
bd66d1ba | 873 | /* ??? What should happen here if highlighting a region? */ |
a2889657 JB |
874 | /* If point does not appear, move point so it does appear */ |
875 | pos = *compute_motion (startp, 0, | |
876 | ((EQ (window, minibuf_window) && startp == 1) | |
877 | ? minibuf_prompt_width : 0) | |
878 | + | |
879 | (hscroll ? 1 - hscroll : 0), | |
880 | ZV, height / 2, | |
881 | - (1 << (SHORTBITS - 1)), | |
882 | width, hscroll, pos_tab_offset (w, startp)); | |
883 | SET_PT (pos.bufpos); | |
44fa5b1e | 884 | if (w != XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
885 | Fset_marker (w->pointm, make_number (point), Qnil); |
886 | else | |
887 | { | |
888 | lpoint = point; | |
44fa5b1e JB |
889 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
890 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
891 | } |
892 | } | |
893 | goto done; | |
894 | } | |
895 | ||
896 | /* Handle case where text has not changed, only point, | |
44fa5b1e | 897 | and it has not moved off the frame */ |
a2889657 JB |
898 | |
899 | /* This code is not used for minibuffer for the sake of | |
900 | the case of redisplaying to replace an echo area message; | |
901 | since in that case the minibuffer contents per se are usually unchanged. | |
902 | This code is of no real use in the minibuffer since | |
903 | the handling of this_line_bufpos, etc., | |
904 | in redisplay handles the same cases. */ | |
905 | ||
906 | if (XFASTINT (w->last_modified) >= MODIFF | |
907 | && point >= startp && !clip_changed | |
44fa5b1e | 908 | && (just_this_one || XFASTINT (w->width) == FRAME_WIDTH (f)) |
bd66d1ba RS |
909 | /* Can't use this case if highlighting a region. */ |
910 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
911 | && NILP (w->region_showing) | |
a2889657 JB |
912 | && !EQ (window, minibuf_window)) |
913 | { | |
914 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), | |
915 | point, height + 1, 10000, width, hscroll, | |
916 | pos_tab_offset (w, startp)); | |
917 | ||
918 | if (pos.vpos < height) | |
919 | { | |
44fa5b1e JB |
920 | /* Ok, point is still on frame */ |
921 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
922 | { |
923 | /* These variables are supposed to be origin 1 */ | |
44fa5b1e JB |
924 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
925 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
926 | } |
927 | /* This doesn't do the trick, because if a window to the right of | |
928 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 929 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 930 | redisplayed, making likes that are empty in this window's columns. |
44fa5b1e | 931 | if (XFASTINT (w->width) != FRAME_WIDTH (f)) |
a2889657 JB |
932 | preserve_my_columns (w); |
933 | */ | |
934 | goto done; | |
935 | } | |
936 | /* Don't bother trying redisplay with same start; | |
937 | we already know it will lose */ | |
938 | } | |
939 | /* If current starting point was originally the beginning of a line | |
940 | but no longer is, find a new starting point. */ | |
265a9e55 | 941 | else if (!NILP (w->start_at_line_beg) |
a2889657 JB |
942 | && !(startp == BEGV |
943 | || FETCH_CHAR (startp - 1) == '\n')) | |
944 | { | |
945 | goto recenter; | |
946 | } | |
947 | else if (just_this_one && !MINI_WINDOW_P (w) | |
948 | && point >= startp | |
949 | && XFASTINT (w->last_modified) | |
950 | && ! EQ (w->window_end_valid, Qnil) | |
951 | && do_id && !clip_changed | |
952 | && !blank_end_of_window | |
44fa5b1e | 953 | && XFASTINT (w->width) == FRAME_WIDTH (f) |
bd66d1ba RS |
954 | /* Can't use this case if highlighting a region. */ |
955 | && !(!NILP (Vtransient_mark_mode) | |
956 | && !NILP (current_buffer->mark_active)) | |
957 | && NILP (w->region_showing) | |
a2889657 JB |
958 | && EQ (last_arrow_position, Voverlay_arrow_position) |
959 | && EQ (last_arrow_string, Voverlay_arrow_string) | |
44fa5b1e | 960 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
961 | && tem != -2) |
962 | { | |
963 | /* tem > 0 means success. tem == -1 means choose new start. | |
964 | tem == -2 means try again with same start, | |
965 | and nothing but whitespace follows the changed stuff. | |
966 | tem == 0 means try again with same start. */ | |
967 | if (tem > 0) | |
968 | goto done; | |
969 | } | |
970 | else if (startp >= BEGV && startp <= ZV | |
971 | /* Avoid starting display at end of buffer! */ | |
8de2d90b | 972 | && (startp < ZV || startp == BEGV |
a2889657 JB |
973 | || (XFASTINT (w->last_modified) >= MODIFF))) |
974 | { | |
975 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 976 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
977 | try_window (window, startp); |
978 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
979 | { |
980 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
981 | /* Forget any recorded base line for line number display. */ | |
982 | w->base_line_number = Qnil; | |
983 | goto done; | |
984 | } | |
a2889657 JB |
985 | else |
986 | cancel_my_columns (w); | |
987 | } | |
988 | ||
989 | XFASTINT (w->last_modified) = 0; | |
990 | w->update_mode_line = Qt; | |
991 | ||
992 | /* Try to scroll by specified few lines */ | |
993 | ||
994 | if (scroll_step && !clip_changed) | |
995 | { | |
996 | if (point > startp) | |
997 | { | |
998 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), | |
999 | scroll_step, width, hscroll, window); | |
1000 | if (pos.vpos >= height) | |
1001 | goto scroll_fail; | |
1002 | } | |
1003 | ||
1004 | pos = *vmotion (startp, point < startp ? - scroll_step : scroll_step, | |
1005 | width, hscroll, window); | |
1006 | ||
1007 | if (point >= pos.bufpos) | |
1008 | { | |
1009 | try_window (window, pos.bufpos); | |
1010 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
1011 | { |
1012 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
1013 | /* Forget any recorded base line for line number display. */ | |
1014 | w->base_line_number = Qnil; | |
1015 | goto done; | |
1016 | } | |
a2889657 JB |
1017 | else |
1018 | cancel_my_columns (w); | |
1019 | } | |
1020 | scroll_fail: ; | |
1021 | } | |
1022 | ||
1023 | /* Finally, just choose place to start which centers point */ | |
1024 | ||
1025 | recenter: | |
aa6d10fa RS |
1026 | /* Forget any previously recorded base line for line number display. */ |
1027 | w->base_line_number = Qnil; | |
1028 | ||
a2889657 JB |
1029 | pos = *vmotion (point, - height / 2, width, hscroll, window); |
1030 | try_window (window, pos.bufpos); | |
1031 | ||
1032 | startp = marker_position (w->start); | |
1033 | w->start_at_line_beg = | |
1034 | (startp == BEGV || FETCH_CHAR (startp - 1) == '\n') ? Qt : Qnil; | |
1035 | ||
1036 | done: | |
265a9e55 | 1037 | if ((!NILP (w->update_mode_line) |
aa6d10fa RS |
1038 | /* If window not full width, must redo its mode line |
1039 | if the window to its side is being redone */ | |
1040 | || (!just_this_one && width < FRAME_WIDTH (f) - 1) | |
1041 | || INTEGERP (w->base_line_pos)) | |
a2889657 JB |
1042 | && height != XFASTINT (w->height)) |
1043 | display_mode_line (w); | |
aa6d10fa RS |
1044 | if (! line_number_displayed |
1045 | && ! BUFFERP (w->base_line_pos)) | |
1046 | { | |
1047 | w->base_line_pos = Qnil; | |
1048 | w->base_line_number = Qnil; | |
1049 | } | |
a2889657 | 1050 | |
7ce2c095 RS |
1051 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
1052 | if (!NILP (w->update_mode_line) | |
1053 | && FRAME_MENU_BAR_LINES (f) > 0 | |
1054 | && EQ (FRAME_SELECTED_WINDOW (f), window)) | |
1055 | display_menu_bar (w); | |
1056 | ||
88f22aff JB |
1057 | finish_scroll_bars: |
1058 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 1059 | { |
b1d1124b | 1060 | int start, end, whole; |
30c566e4 | 1061 | |
b1d1124b | 1062 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
1063 | At some point, it would be nice to choose between scrollbars |
1064 | which reflect the whole buffer size, with special markers | |
1065 | indicating narrowing, and scrollbars which reflect only the | |
1066 | visible region. | |
1067 | ||
b1d1124b JB |
1068 | Note that minibuffers sometimes aren't displaying any text. */ |
1069 | if (! MINI_WINDOW_P (w) | |
1070 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
1071 | { | |
6887f623 | 1072 | start = startp - BEGV; |
b1d1124b JB |
1073 | /* I don't think this is guaranteed to be right. For the |
1074 | moment, we'll pretend it is. */ | |
6887f623 | 1075 | end = Z - XINT (w->window_end_pos) - BEGV; |
3505ea70 JB |
1076 | whole = ZV - BEGV; |
1077 | ||
1078 | if (end < start) end = start; | |
1079 | if (whole > (end - start)) whole = end - start; | |
b1d1124b JB |
1080 | } |
1081 | else | |
1082 | start = end = whole = 0; | |
30c566e4 | 1083 | |
88f22aff JB |
1084 | /* Indicate what this scroll bar ought to be displaying now. */ |
1085 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start - 1); | |
30c566e4 | 1086 | |
88f22aff | 1087 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 1088 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 1089 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 1090 | } |
b1d1124b JB |
1091 | |
1092 | SET_PT (opoint); | |
1093 | current_buffer = old; | |
1094 | SET_PT (lpoint); | |
a2889657 JB |
1095 | } |
1096 | \f | |
1097 | /* Do full redisplay on one window, starting at position `pos'. */ | |
1098 | ||
1099 | static void | |
1100 | try_window (window, pos) | |
1101 | Lisp_Object window; | |
1102 | register int pos; | |
1103 | { | |
1104 | register struct window *w = XWINDOW (window); | |
1105 | register int height = window_internal_height (w); | |
1106 | register int vpos = XFASTINT (w->top); | |
1107 | register int last_text_vpos = vpos; | |
1108 | int tab_offset = pos_tab_offset (w, pos); | |
44fa5b1e | 1109 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 1110 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1111 | struct position val; |
1112 | ||
1113 | Fset_marker (w->start, make_number (pos), Qnil); | |
1114 | cursor_vpos = -1; | |
1115 | overlay_arrow_seen = 0; | |
1116 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1117 | ||
1118 | while (--height >= 0) | |
1119 | { | |
1120 | val = *display_text_line (w, pos, vpos, val.hpos, tab_offset); | |
1121 | tab_offset += width; | |
1122 | if (val.vpos) tab_offset = 0; | |
1123 | vpos++; | |
1124 | if (pos != val.bufpos) | |
1125 | last_text_vpos | |
1126 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1127 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1128 | pos = val.bufpos; | |
1129 | } | |
1130 | ||
1131 | /* If last line is continued in middle of character, | |
44fa5b1e | 1132 | include the split character in the text considered on the frame */ |
a2889657 JB |
1133 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
1134 | pos++; | |
1135 | ||
44fa5b1e | 1136 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1137 | if (XFASTINT (w->window_end_pos) == 0 |
1138 | && Z != pos) | |
1139 | w->update_mode_line = Qt; | |
1140 | ||
44fa5b1e | 1141 | /* Say where last char on frame will be, once redisplay is finished. */ |
a2889657 JB |
1142 | XFASTINT (w->window_end_pos) = Z - pos; |
1143 | XFASTINT (w->window_end_vpos) = last_text_vpos - XFASTINT (w->top); | |
1144 | /* But that is not valid info until redisplay finishes. */ | |
1145 | w->window_end_valid = Qnil; | |
1146 | } | |
1147 | \f | |
1148 | /* Try to redisplay when buffer is modified locally, | |
1149 | computing insert/delete line to preserve text outside | |
1150 | the bounds of the changes. | |
1151 | Return 1 if successful, 0 if if cannot tell what to do, | |
1152 | or -1 to tell caller to find a new window start, | |
1153 | or -2 to tell caller to do normal redisplay with same window start. */ | |
1154 | ||
1155 | static int | |
1156 | try_window_id (window) | |
1157 | Lisp_Object window; | |
1158 | { | |
1159 | int pos; | |
1160 | register struct window *w = XWINDOW (window); | |
1161 | register int height = window_internal_height (w); | |
44fa5b1e | 1162 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
1163 | int top = XFASTINT (w->top); |
1164 | int start = marker_position (w->start); | |
b1d1124b | 1165 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1166 | int hscroll = XINT (w->hscroll); |
1167 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
1168 | register int vpos; | |
1169 | register int i, tem; | |
1170 | int last_text_vpos = 0; | |
1171 | int stop_vpos; | |
1172 | ||
1173 | struct position val, bp, ep, xp, pp; | |
1174 | int scroll_amount = 0; | |
1175 | int delta; | |
1176 | int tab_offset, epto; | |
1177 | ||
1178 | if (GPT - BEG < beg_unchanged) | |
1179 | beg_unchanged = GPT - BEG; | |
1180 | if (Z - GPT < end_unchanged) | |
1181 | end_unchanged = Z - GPT; | |
1182 | ||
1183 | if (beg_unchanged + 1 < start) | |
1184 | return 0; /* Give up if changes go above top of window */ | |
1185 | ||
1186 | /* Find position before which nothing is changed. */ | |
1187 | bp = *compute_motion (start, 0, lmargin, | |
f7be7f78 | 1188 | beg_unchanged + 1, height + 1, 0, width, hscroll, |
a2889657 JB |
1189 | pos_tab_offset (w, start)); |
1190 | if (bp.vpos >= height) | |
6e8290aa JB |
1191 | { |
1192 | if (point < bp.bufpos && !bp.contin) | |
1193 | { | |
44fa5b1e JB |
1194 | /* All changes are below the frame, and point is on the frame. |
1195 | We don't need to change the frame at all. | |
6e8290aa JB |
1196 | But we need to update window_end_pos to account for |
1197 | any change in buffer size. */ | |
f7be7f78 JB |
1198 | bp = *compute_motion (start, 0, lmargin, |
1199 | Z, height, 0, | |
1200 | width, hscroll, pos_tab_offset (w, start)); | |
6e8290aa JB |
1201 | XFASTINT (w->window_end_vpos) = height; |
1202 | XFASTINT (w->window_end_pos) = Z - bp.bufpos; | |
1203 | return 1; | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
a2889657 JB |
1207 | |
1208 | vpos = bp.vpos; | |
1209 | ||
44fa5b1e | 1210 | /* Find beginning of that frame line. Must display from there. */ |
a2889657 JB |
1211 | bp = *vmotion (bp.bufpos, 0, width, hscroll, window); |
1212 | ||
1213 | pos = bp.bufpos; | |
1214 | val.hpos = lmargin; | |
1215 | if (pos < start) | |
1216 | return -1; | |
1217 | ||
1218 | /* If about to start displaying at the beginning of a continuation line, | |
44fa5b1e | 1219 | really start with previous frame line, in case it was not |
a2889657 | 1220 | continued when last redisplayed */ |
05ba02eb JB |
1221 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
1222 | || | |
1223 | /* Likewise if we have to worry about selective display. */ | |
1224 | (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1225 | && XINT (current_buffer->selective_display) > 0 | |
1226 | && bp.bufpos - 1 == beg_unchanged && vpos > 0)) | |
a2889657 JB |
1227 | { |
1228 | bp = *vmotion (bp.bufpos, -1, width, hscroll, window); | |
1229 | --vpos; | |
1230 | pos = bp.bufpos; | |
1231 | } | |
1232 | ||
1233 | if (bp.contin && bp.hpos != lmargin) | |
1234 | { | |
1235 | val.hpos = bp.prevhpos - width + lmargin; | |
1236 | pos--; | |
1237 | } | |
1238 | ||
1239 | bp.vpos = vpos; | |
1240 | ||
1241 | /* Find first visible newline after which no more is changed. */ | |
1242 | tem = find_next_newline (Z - max (end_unchanged, Z - ZV), 1); | |
1243 | if (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1244 | && XINT (current_buffer->selective_display) > 0) | |
1245 | while (tem < ZV - 1 | |
1246 | && (position_indentation (tem) | |
1247 | >= XINT (current_buffer->selective_display))) | |
1248 | tem = find_next_newline (tem, 1); | |
1249 | ||
1250 | /* Compute the cursor position after that newline. */ | |
1251 | ep = *compute_motion (pos, vpos, val.hpos, tem, | |
1252 | height, - (1 << (SHORTBITS - 1)), | |
1253 | width, hscroll, pos_tab_offset (w, bp.bufpos)); | |
1254 | ||
44fa5b1e JB |
1255 | /* If changes reach past the text available on the frame, |
1256 | just display rest of frame. */ | |
a2889657 JB |
1257 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
1258 | stop_vpos = height; | |
1259 | else | |
1260 | stop_vpos = ep.vpos; | |
1261 | ||
1262 | /* If no newline before ep, the line ep is on includes some changes | |
1263 | that must be displayed. Make sure we don't stop before it. */ | |
1264 | /* Also, if changes reach all the way until ep.bufpos, | |
1265 | it is possible that something was deleted after the | |
1266 | newline before it, so the following line must be redrawn. */ | |
1267 | if (stop_vpos == ep.vpos | |
1268 | && (ep.bufpos == BEGV | |
1269 | || FETCH_CHAR (ep.bufpos - 1) != '\n' | |
1270 | || ep.bufpos == Z - end_unchanged)) | |
1271 | stop_vpos = ep.vpos + 1; | |
1272 | ||
1273 | cursor_vpos = -1; | |
1274 | overlay_arrow_seen = 0; | |
1275 | ||
1276 | /* If changes do not reach to bottom of window, | |
1277 | figure out how much to scroll the rest of the window */ | |
1278 | if (stop_vpos < height) | |
1279 | { | |
1280 | /* Now determine how far up or down the rest of the window has moved */ | |
1281 | epto = pos_tab_offset (w, ep.bufpos); | |
1282 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1283 | Z - XFASTINT (w->window_end_pos), | |
1284 | 10000, 0, width, hscroll, epto); | |
1285 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); | |
1286 | ||
44fa5b1e | 1287 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
1288 | If so, no scrolling is really necessary. */ |
1289 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
1290 | { | |
1291 | tem = FETCH_CHAR (i); | |
1292 | if (tem != ' ' && tem != '\n' && tem != '\t') | |
1293 | break; | |
1294 | } | |
1295 | if (i == xp.bufpos) | |
1296 | return -2; | |
1297 | ||
1298 | XFASTINT (w->window_end_vpos) += scroll_amount; | |
1299 | ||
44fa5b1e | 1300 | /* Before doing any scrolling, verify that point will be on frame. */ |
a2889657 JB |
1301 | if (point > ep.bufpos && !(point <= xp.bufpos && xp.bufpos < height)) |
1302 | { | |
1303 | if (point <= xp.bufpos) | |
1304 | { | |
1305 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1306 | point, height, - (1 << (SHORTBITS - 1)), | |
1307 | width, hscroll, epto); | |
1308 | } | |
1309 | else | |
1310 | { | |
1311 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, | |
1312 | point, height, - (1 << (SHORTBITS - 1)), | |
1313 | width, hscroll, pos_tab_offset (w, xp.bufpos)); | |
1314 | } | |
1315 | if (pp.bufpos < point || pp.vpos == height) | |
1316 | return 0; | |
1317 | cursor_vpos = pp.vpos + top; | |
1318 | cursor_hpos = pp.hpos + XFASTINT (w->left); | |
1319 | } | |
1320 | ||
1321 | if (stop_vpos - scroll_amount >= height | |
1322 | || ep.bufpos == xp.bufpos) | |
1323 | { | |
1324 | if (scroll_amount < 0) | |
1325 | stop_vpos -= scroll_amount; | |
1326 | scroll_amount = 0; | |
1327 | /* In this path, we have altered window_end_vpos | |
1328 | and not left it negative. | |
1329 | We must make sure that, in case display is preempted | |
44fa5b1e | 1330 | before the frame changes to reflect what we do here, |
a2889657 | 1331 | further updates will not come to try_window_id |
44fa5b1e | 1332 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
1333 | blank_end_of_window = 1; |
1334 | } | |
1335 | else if (!scroll_amount) | |
1336 | {} | |
1337 | else if (bp.bufpos == Z - end_unchanged) | |
1338 | { | |
1339 | /* If reprinting everything is nearly as fast as scrolling, | |
1340 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 1341 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1342 | top + height - max (0, scroll_amount), |
1343 | scroll_amount) | |
1344 | > xp.bufpos - bp.bufpos - 20) | |
1345 | /* Return "try normal display with same window-start." | |
1346 | Too bad we can't prevent further scroll-thinking. */ | |
1347 | return -2; | |
1348 | /* If pure deletion, scroll up as many lines as possible. | |
1349 | In common case of killing a line, this can save the | |
1350 | following line from being overwritten by scrolling | |
1351 | and therefore having to be redrawn. */ | |
44fa5b1e | 1352 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1353 | top + height - max (0, scroll_amount), |
1354 | scroll_amount); | |
1355 | if (!tem) stop_vpos = height; | |
1356 | } | |
1357 | else if (scroll_amount) | |
1358 | { | |
1359 | /* If reprinting everything is nearly as fast as scrolling, | |
1360 | don't bother scrolling. Can happen if lines are short. */ | |
1361 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
1362 | overestimate of cost of reprinting, since xp.bufpos | |
1363 | would end up below the bottom of the window. */ | |
44fa5b1e | 1364 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1365 | top + height - max (0, scroll_amount), |
1366 | scroll_amount) | |
1367 | > xp.bufpos - ep.bufpos - 20) | |
1368 | /* Return "try normal display with same window-start." | |
1369 | Too bad we can't prevent further scroll-thinking. */ | |
1370 | return -2; | |
44fa5b1e | 1371 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1372 | top + height - max (0, scroll_amount), |
1373 | scroll_amount); | |
1374 | if (!tem) stop_vpos = height; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | /* In any case, do not display past bottom of window */ | |
1379 | if (stop_vpos >= height) | |
1380 | { | |
1381 | stop_vpos = height; | |
1382 | scroll_amount = 0; | |
1383 | } | |
1384 | ||
1385 | /* Handle case where pos is before w->start -- | |
1386 | can happen if part of line had been clipped and is not clipped now */ | |
1387 | if (vpos == 0 && pos < marker_position (w->start)) | |
1388 | Fset_marker (w->start, make_number (pos), Qnil); | |
1389 | ||
1390 | /* Redisplay the lines where the text was changed */ | |
1391 | last_text_vpos = vpos; | |
1392 | tab_offset = pos_tab_offset (w, pos); | |
1393 | /* If we are starting display in mid-character, correct tab_offset | |
1394 | to account for passing the line that that character really starts in. */ | |
1395 | if (val.hpos < lmargin) | |
1396 | tab_offset += width; | |
1397 | while (vpos < stop_vpos) | |
1398 | { | |
1399 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1400 | tab_offset += width; | |
1401 | if (val.vpos) tab_offset = 0; | |
1402 | if (pos != val.bufpos) | |
1403 | last_text_vpos | |
1404 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1405 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1406 | pos = val.bufpos; | |
1407 | } | |
1408 | ||
1409 | /* There are two cases: | |
1410 | 1) we have displayed down to the bottom of the window | |
1411 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
1412 | ||
1413 | if (vpos == height) | |
1414 | { | |
1415 | /* If last line is continued in middle of character, | |
44fa5b1e | 1416 | include the split character in the text considered on the frame */ |
a2889657 JB |
1417 | if (val.hpos < lmargin) |
1418 | val.bufpos++; | |
1419 | XFASTINT (w->window_end_vpos) = last_text_vpos; | |
1420 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1421 | } | |
1422 | ||
1423 | /* If scrolling made blank lines at window bottom, | |
1424 | redisplay to fill those lines */ | |
1425 | if (scroll_amount < 0) | |
1426 | { | |
1427 | /* Don't consider these lines for general-purpose scrolling. | |
1428 | That will save time in the scrolling computation. */ | |
44fa5b1e | 1429 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
1430 | vpos = xp.vpos; |
1431 | pos = xp.bufpos; | |
1432 | val.hpos = lmargin; | |
1433 | if (pos == ZV) | |
1434 | vpos = height + scroll_amount; | |
1435 | else if (xp.contin && xp.hpos != lmargin) | |
1436 | { | |
1437 | val.hpos = xp.prevhpos - width + lmargin; | |
1438 | pos--; | |
1439 | } | |
1440 | ||
1441 | blank_end_of_window = 1; | |
1442 | tab_offset = pos_tab_offset (w, pos); | |
1443 | /* If we are starting display in mid-character, correct tab_offset | |
1444 | to account for passing the line that that character starts in. */ | |
1445 | if (val.hpos < lmargin) | |
1446 | tab_offset += width; | |
1447 | ||
1448 | while (vpos < height) | |
1449 | { | |
1450 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1451 | tab_offset += width; | |
1452 | if (val.vpos) tab_offset = 0; | |
1453 | pos = val.bufpos; | |
1454 | } | |
1455 | ||
1456 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
1457 | Make it be fixed up, below. */ | |
1458 | if (xp.bufpos == ZV | |
1459 | && xp.bufpos == point) | |
1460 | cursor_vpos = -1; | |
1461 | } | |
1462 | ||
44fa5b1e | 1463 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1464 | if (XFASTINT (w->window_end_pos) == 0 |
1465 | && Z != val.bufpos) | |
1466 | w->update_mode_line = Qt; | |
1467 | ||
1468 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
1469 | if (scroll_amount) | |
1470 | { | |
1471 | delta = height - xp.vpos; | |
1472 | if (delta < 0 | |
1473 | || (delta > 0 && xp.bufpos <= ZV) | |
1474 | || (delta == 0 && xp.hpos)) | |
1475 | { | |
1476 | val = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1477 | delta, width, hscroll, window); | |
1478 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1479 | XFASTINT (w->window_end_vpos) += val.vpos; | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | w->window_end_valid = Qnil; | |
1484 | ||
1485 | /* If point was not in a line that was displayed, find it */ | |
1486 | if (cursor_vpos < 0) | |
1487 | { | |
1488 | val = *compute_motion (start, 0, lmargin, point, 10000, 10000, | |
1489 | width, hscroll, pos_tab_offset (w, start)); | |
44fa5b1e | 1490 | /* Admit failure if point is off frame now */ |
a2889657 JB |
1491 | if (val.vpos >= height) |
1492 | { | |
1493 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 1494 | cancel_line (vpos + top, f); |
a2889657 JB |
1495 | return 0; |
1496 | } | |
1497 | cursor_vpos = val.vpos + top; | |
1498 | cursor_hpos = val.hpos + XFASTINT (w->left); | |
1499 | } | |
1500 | ||
44fa5b1e JB |
1501 | FRAME_CURSOR_X (f) = max (0, cursor_hpos); |
1502 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
a2889657 JB |
1503 | |
1504 | if (debug_end_pos) | |
1505 | { | |
1506 | val = *compute_motion (start, 0, lmargin, ZV, | |
1507 | height, - (1 << (SHORTBITS - 1)), | |
1508 | width, hscroll, pos_tab_offset (w, start)); | |
1509 | if (val.vpos != XFASTINT (w->window_end_vpos)) | |
1510 | abort (); | |
1511 | if (XFASTINT (w->window_end_pos) | |
1512 | != Z - val.bufpos) | |
1513 | abort (); | |
1514 | } | |
1515 | ||
1516 | return 1; | |
1517 | } | |
1518 | \f | |
31b24551 JB |
1519 | /* Mark a section of BUF as modified, but only for the sake of redisplay. |
1520 | This is useful for recording changes to overlays. | |
1521 | ||
1522 | We increment the buffer's modification timestamp and set the | |
1523 | redisplay caches (windows_or_buffers_changed, beg_unchanged, etc) | |
1524 | as if the region of text between START and END had been modified; | |
1525 | the redisplay code will check this against the windows' timestamps, | |
1526 | and redraw the appropriate area of the buffer. | |
1527 | ||
1528 | However, if the buffer is unmodified, we bump the last-save | |
1529 | timestamp as well, so that incrementing the timestamp doesn't fool | |
1530 | Emacs into thinking that the buffer's text has been modified. | |
1531 | ||
1532 | Tweaking the timestamps shouldn't hurt the first-modification | |
1533 | timestamps recorded in the undo records; those values aren't | |
1534 | written until just before a real text modification is made, so they | |
1535 | will never catch the timestamp value just before this function gets | |
1536 | called. */ | |
1537 | ||
1538 | void | |
1539 | redisplay_region (buf, start, end) | |
1540 | struct buffer *buf; | |
1541 | int start, end; | |
1542 | { | |
1543 | if (start == end) | |
1544 | return; | |
1545 | ||
1546 | if (start > end) | |
1547 | { | |
1548 | int temp = start; | |
1549 | start = end; end = temp; | |
1550 | } | |
1551 | ||
1552 | if (buf != current_buffer) | |
1553 | windows_or_buffers_changed = 1; | |
1554 | else | |
1555 | { | |
1556 | if (unchanged_modified == MODIFF) | |
1557 | { | |
1558 | beg_unchanged = start - BEG; | |
1559 | end_unchanged = Z - end; | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | if (Z - end < end_unchanged) | |
1564 | end_unchanged = Z - end; | |
1565 | if (start - BEG < beg_unchanged) | |
1566 | beg_unchanged = start - BEG; | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | /* Increment the buffer's time stamp, but also increment the save | |
1571 | and autosave timestamps, so as not to screw up that timekeeping. */ | |
1572 | if (BUF_MODIFF (buf) == buf->save_modified) | |
1573 | buf->save_modified++; | |
1574 | if (BUF_MODIFF (buf) == buf->auto_save_modified) | |
1575 | buf->auto_save_modified++; | |
1576 | ||
1577 | BUF_MODIFF (buf) ++; | |
1578 | } | |
1579 | ||
1580 | \f | |
c581d710 | 1581 | /* Copy glyphs from the vector FROM to the rope T. |
f7430cb6 | 1582 | But don't actually copy the parts that would come in before S. |
c581d710 | 1583 | Value is T, advanced past the copied data. */ |
a2889657 JB |
1584 | |
1585 | GLYPH * | |
1c2250c2 | 1586 | copy_rope (t, s, from, face) |
a2889657 JB |
1587 | register GLYPH *t; /* Copy to here. */ |
1588 | register GLYPH *s; /* Starting point. */ | |
1c2250c2 JB |
1589 | Lisp_Object from; /* Data to copy; known to be a vector. */ |
1590 | int face; /* Face to apply to glyphs which don't specify one. */ | |
a2889657 | 1591 | { |
c581d710 RS |
1592 | register int n = XVECTOR (from)->size; |
1593 | register Lisp_Object *f = XVECTOR (from)->contents; | |
1594 | ||
1595 | while (n--) | |
1596 | { | |
1c2250c2 JB |
1597 | if (t >= s) *t = MAKE_GLYPH (GLYPH_CHAR (*f), |
1598 | (GLYPH_FACE (*f) | |
1599 | ? GLYPH_FACE (*f) | |
1600 | : face)); | |
c581d710 RS |
1601 | ++t; |
1602 | ++f; | |
1603 | } | |
1604 | return t; | |
1605 | } | |
1606 | ||
68a37fa8 RS |
1607 | /* Copy exactly LEN glyphs from FROM into data at T. |
1608 | But don't alter words before S. */ | |
c581d710 RS |
1609 | |
1610 | GLYPH * | |
1c2250c2 | 1611 | copy_part_of_rope (t, s, from, len, face) |
c581d710 RS |
1612 | register GLYPH *t; /* Copy to here. */ |
1613 | register GLYPH *s; /* Starting point. */ | |
1c2250c2 | 1614 | Lisp_Object *from; /* Data to copy. */ |
c581d710 | 1615 | int len; |
1c2250c2 | 1616 | int face; /* Face to apply to glyphs which don't specify one. */ |
c581d710 | 1617 | { |
68a37fa8 RS |
1618 | int n = len; |
1619 | register Lisp_Object *f = from; | |
a2889657 JB |
1620 | |
1621 | while (n--) | |
1622 | { | |
1c2250c2 JB |
1623 | if (t >= s) *t = MAKE_GLYPH (GLYPH_CHAR (*f), |
1624 | (GLYPH_FACE (*f) | |
1625 | ? GLYPH_FACE (*f) | |
1626 | : face)); | |
a2889657 JB |
1627 | ++t; |
1628 | ++f; | |
1629 | } | |
1630 | return t; | |
1631 | } | |
1632 | \f | |
1633 | /* Display one line of window w, starting at position START in W's buffer. | |
1634 | Display starting at horizontal position HPOS, which is normally zero | |
1635 | or negative. A negative value causes output up to hpos = 0 to be discarded. | |
1636 | This is done for negative hscroll, or when this is a continuation line | |
1637 | and the continuation occurred in the middle of a multi-column character. | |
1638 | ||
1639 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
1640 | ||
44fa5b1e | 1641 | Display on position VPOS on the frame. (origin 0). |
a2889657 JB |
1642 | |
1643 | Returns a STRUCT POSITION giving character to start next line with | |
1644 | and where to display it, including a zero or negative hpos. | |
1645 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
1646 | ||
1647 | struct position val_display_text_line; | |
1648 | ||
1649 | static struct position * | |
1650 | display_text_line (w, start, vpos, hpos, taboffset) | |
1651 | struct window *w; | |
1652 | int start; | |
1653 | int vpos; | |
1654 | int hpos; | |
1655 | int taboffset; | |
1656 | { | |
1657 | register int pos = start; | |
1658 | register int c; | |
1659 | register GLYPH *p1; | |
1660 | int end; | |
1661 | register int pause; | |
1662 | register unsigned char *p; | |
1663 | GLYPH *endp; | |
1664 | register GLYPH *startp; | |
1665 | register GLYPH *p1prev; | |
44fa5b1e | 1666 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 1667 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 1668 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 1669 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1670 | struct position val; |
1671 | int lastpos; | |
1672 | int invis; | |
1673 | int hscroll = XINT (w->hscroll); | |
1674 | int truncate = hscroll | |
1675 | || (truncate_partial_width_windows | |
44fa5b1e | 1676 | && XFASTINT (w->width) < FRAME_WIDTH (f)) |
265a9e55 | 1677 | || !NILP (current_buffer->truncate_lines); |
bd66d1ba RS |
1678 | |
1679 | /* 1 if we should highlight the region. */ | |
1680 | int highlight_region | |
1681 | = !NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active); | |
1682 | int region_beg, region_end; | |
1683 | ||
a2889657 JB |
1684 | int selective |
1685 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1686 | ? XINT (current_buffer->selective_display) | |
265a9e55 | 1687 | : !NILP (current_buffer->selective_display) ? -1 : 0; |
44fa5b1e | 1688 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
a2889657 | 1689 | register struct Lisp_Vector *dp = window_display_table (w); |
68a37fa8 RS |
1690 | |
1691 | Lisp_Object default_invis_vector[3]; | |
1692 | /* Nonzero means display something where there are invisible lines. | |
1693 | The precise value is the number of glyphs to display. */ | |
a2889657 | 1694 | int selective_rlen |
c581d710 | 1695 | = (selective && dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector |
68a37fa8 RS |
1696 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
1697 | : selective && !NILP (current_buffer->selective_display_ellipses) | |
1698 | ? 3 : 0); | |
1699 | /* This is the sequence of Lisp objects to display | |
1700 | when there are invisible lines. */ | |
1701 | Lisp_Object *invis_vector_contents | |
1702 | = (dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector | |
1703 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents | |
1704 | : default_invis_vector); | |
1705 | ||
a2889657 JB |
1706 | GLYPH truncator = (dp == 0 || XTYPE (DISP_TRUNC_GLYPH (dp)) != Lisp_Int |
1707 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); | |
1708 | GLYPH continuer = (dp == 0 || XTYPE (DISP_CONTINUE_GLYPH (dp)) != Lisp_Int | |
1709 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); | |
1710 | ||
31b24551 JB |
1711 | /* The next buffer location at which the face should change, due |
1712 | to overlays or text property changes. */ | |
1713 | int next_face_change; | |
1714 | ||
1715 | /* The face we're currently using. */ | |
1c2250c2 | 1716 | int current_face = 0; |
31b24551 | 1717 | |
68a37fa8 RS |
1718 | XFASTINT (default_invis_vector[2]) = '.'; |
1719 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; | |
1720 | ||
a2889657 | 1721 | hpos += XFASTINT (w->left); |
44fa5b1e | 1722 | get_display_line (f, vpos, XFASTINT (w->left)); |
54ff581a | 1723 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 1724 | |
bd66d1ba RS |
1725 | /* Show where to highlight the region. */ |
1726 | if (highlight_region && XMARKER (current_buffer->mark)->buffer != 0) | |
1727 | { | |
1728 | region_beg = marker_position (current_buffer->mark); | |
1729 | if (PT < region_beg) | |
1730 | { | |
1731 | region_end = region_beg; | |
1732 | region_beg = PT; | |
1733 | } | |
1734 | else | |
1735 | region_end = PT; | |
1736 | w->region_showing = Qt; | |
1737 | } | |
1738 | else | |
1739 | region_beg = region_end = -1; | |
1740 | ||
a2889657 JB |
1741 | if (MINI_WINDOW_P (w) && start == 1 |
1742 | && vpos == XFASTINT (w->top)) | |
1743 | { | |
1744 | if (minibuf_prompt) | |
1745 | hpos = display_string (w, vpos, minibuf_prompt, hpos, | |
1746 | (!truncate ? continuer : truncator), | |
1747 | -1, -1); | |
1748 | minibuf_prompt_width = hpos; | |
1749 | } | |
1750 | ||
1751 | desired_glyphs->bufp[vpos] = pos; | |
1752 | p1 = desired_glyphs->glyphs[vpos] + hpos; | |
1753 | end = ZV; | |
1754 | startp = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
1755 | endp = startp + width; | |
1756 | ||
1c2250c2 JB |
1757 | /* Arrange the overlays nicely for our purposes. Usually, we call |
1758 | display_text_line on only one line at a time, in which case this | |
1759 | can't really hurt too much, or we call it on lines which appear | |
1760 | one after another in the buffer, in which case all calls to | |
1761 | recenter_overlay_lists but the first will be pretty cheap. */ | |
1762 | recenter_overlay_lists (current_buffer, pos); | |
1763 | ||
a2889657 JB |
1764 | /* Loop generating characters. |
1765 | Stop at end of buffer, before newline, | |
31b24551 JB |
1766 | if reach or pass continuation column, |
1767 | or at face change. */ | |
a2889657 | 1768 | pause = pos; |
31b24551 | 1769 | next_face_change = pos; |
a2889657 JB |
1770 | while (p1 < endp) |
1771 | { | |
1772 | p1prev = p1; | |
31b24551 | 1773 | if (pos >= pause) |
a2889657 | 1774 | { |
31b24551 JB |
1775 | /* Did we hit the end of the visible region of the buffer? |
1776 | Stop here. */ | |
1777 | if (pos >= end) | |
a2889657 | 1778 | break; |
31b24551 JB |
1779 | |
1780 | /* Did we reach point? Record the cursor location. */ | |
a2889657 JB |
1781 | if (pos == point && cursor_vpos < 0) |
1782 | { | |
1783 | cursor_vpos = vpos; | |
1784 | cursor_hpos = p1 - startp; | |
1785 | } | |
1786 | ||
9dbd4b48 | 1787 | #ifdef HAVE_X_WINDOWS |
31b24551 JB |
1788 | /* Did we hit a face change? Figure out what face we should |
1789 | use now. We also hit this the first time through the | |
1790 | loop, to see what face we should start with. */ | |
1791 | if (pos == next_face_change) | |
bd66d1ba RS |
1792 | current_face = compute_char_face (f, w, pos, |
1793 | region_beg, region_end, | |
1794 | &next_face_change); | |
9dbd4b48 | 1795 | #endif |
31b24551 | 1796 | |
1c2250c2 JB |
1797 | pause = end; |
1798 | ||
1799 | if (pos < next_face_change && next_face_change < pause) | |
1800 | pause = next_face_change; | |
1801 | ||
31b24551 JB |
1802 | /* Wouldn't you hate to read the next line to someone over |
1803 | the phone? */ | |
a2889657 JB |
1804 | if (pos < point && point < pause) |
1805 | pause = point; | |
1806 | if (pos < GPT && GPT < pause) | |
1807 | pause = GPT; | |
1808 | ||
1809 | p = &FETCH_CHAR (pos); | |
1810 | } | |
1811 | c = *p++; | |
1812 | if (c >= 040 && c < 0177 | |
c581d710 | 1813 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
1814 | { |
1815 | if (p1 >= startp) | |
1c2250c2 | 1816 | *p1 = MAKE_GLYPH (c, current_face); |
a2889657 JB |
1817 | p1++; |
1818 | } | |
1819 | else if (c == '\n') | |
1820 | { | |
1821 | invis = 0; | |
1822 | while (pos < end | |
1823 | && selective > 0 | |
1824 | && position_indentation (pos + 1) >= selective) | |
1825 | { | |
1826 | invis = 1; | |
1827 | pos = find_next_newline (pos + 1, 1); | |
1828 | if (FETCH_CHAR (pos - 1) == '\n') | |
1829 | pos--; | |
1830 | } | |
1831 | if (invis && selective_rlen > 0 && p1 >= startp) | |
1832 | { | |
1833 | p1 += selective_rlen; | |
1834 | if (p1 - startp > width) | |
1835 | p1 = endp; | |
68a37fa8 | 1836 | copy_part_of_rope (p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 1837 | (p1 - p1prev), current_face); |
a2889657 | 1838 | } |
3c5c35c5 JB |
1839 | #if 1 |
1840 | /* Draw the face of the newline character as extending all the | |
1841 | way to the end of the frame line. */ | |
1842 | if (current_face) | |
1843 | while (p1 < endp) | |
1844 | *p1++ = MAKE_GLYPH (' ', current_face); | |
1845 | #endif | |
68a37fa8 | 1846 | break; |
a2889657 JB |
1847 | } |
1848 | else if (c == '\t') | |
1849 | { | |
1850 | do | |
1851 | { | |
1852 | if (p1 >= startp && p1 < endp) | |
1c2250c2 | 1853 | *p1 = MAKE_GLYPH (' ', current_face); |
a2889657 JB |
1854 | p1++; |
1855 | } | |
1856 | while ((p1 - startp + taboffset + hscroll - (hscroll > 0)) | |
1857 | % tab_width); | |
1858 | } | |
6e8290aa | 1859 | else if (c == Ctl ('M') && selective == -1) |
a2889657 JB |
1860 | { |
1861 | pos = find_next_newline (pos, 1); | |
1862 | if (FETCH_CHAR (pos - 1) == '\n') | |
1863 | pos--; | |
1864 | if (selective_rlen > 0) | |
1865 | { | |
1866 | p1 += selective_rlen; | |
1867 | if (p1 - startp > width) | |
1868 | p1 = endp; | |
68a37fa8 | 1869 | copy_part_of_rope (p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 1870 | (p1 - p1prev), current_face); |
a2889657 | 1871 | } |
3c5c35c5 JB |
1872 | #if 1 |
1873 | /* Draw the face of the newline character as extending all the | |
1874 | way to the end of the frame line. */ | |
1875 | if (current_face) | |
1876 | while (p1 < endp) | |
1877 | *p1++ = MAKE_GLYPH (' ', current_face); | |
1878 | #endif | |
68a37fa8 | 1879 | break; |
a2889657 | 1880 | } |
c581d710 | 1881 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
a2889657 | 1882 | { |
1c2250c2 | 1883 | p1 = copy_rope (p1, startp, DISP_CHAR_VECTOR (dp, c), current_face); |
a2889657 JB |
1884 | } |
1885 | else if (c < 0200 && ctl_arrow) | |
1886 | { | |
1887 | if (p1 >= startp) | |
31b24551 JB |
1888 | *p1 = MAKE_GLYPH ((dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int |
1889 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
1c2250c2 | 1890 | current_face); |
a2889657 | 1891 | p1++; |
6e8290aa | 1892 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1893 | *p1 = MAKE_GLYPH (c ^ 0100, current_face); |
a2889657 JB |
1894 | p1++; |
1895 | } | |
1896 | else | |
1897 | { | |
1898 | if (p1 >= startp) | |
31b24551 JB |
1899 | *p1 = MAKE_GLYPH ((dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int |
1900 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
1c2250c2 | 1901 | current_face); |
a2889657 | 1902 | p1++; |
6e8290aa | 1903 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1904 | *p1 = MAKE_GLYPH ((c >> 6) + '0', current_face); |
a2889657 | 1905 | p1++; |
6e8290aa | 1906 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1907 | *p1 = MAKE_GLYPH ((7 & (c >> 3)) + '0', current_face); |
a2889657 | 1908 | p1++; |
6e8290aa | 1909 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1910 | *p1 = MAKE_GLYPH ((7 & c) + '0', current_face); |
a2889657 JB |
1911 | p1++; |
1912 | } | |
31b24551 | 1913 | |
a2889657 JB |
1914 | pos++; |
1915 | } | |
1916 | ||
1917 | val.hpos = - XINT (w->hscroll); | |
1918 | if (val.hpos) | |
1919 | val.hpos++; | |
1920 | ||
1921 | val.vpos = 1; | |
1922 | ||
1923 | lastpos = pos; | |
1924 | ||
1925 | /* Handle continuation in middle of a character */ | |
1926 | /* by backing up over it */ | |
1927 | if (p1 > endp) | |
1928 | { | |
1929 | /* Start the next line with that same character */ | |
1930 | pos--; | |
1931 | /* but at a negative hpos, to skip the columns output on this line. */ | |
1932 | val.hpos += p1prev - endp; | |
1933 | /* Keep in this line everything up to the continuation column. */ | |
1934 | p1 = endp; | |
1935 | } | |
1936 | ||
1937 | /* Finish deciding which character to start the next line on, | |
1938 | and what hpos to start it at. | |
1939 | Also set `lastpos' to the last position which counts as "on this line" | |
1940 | for cursor-positioning. */ | |
1941 | ||
1942 | if (pos < ZV) | |
1943 | { | |
1944 | if (FETCH_CHAR (pos) == '\n') | |
1945 | /* If stopped due to a newline, start next line after it */ | |
1946 | pos++; | |
1947 | else | |
1948 | /* Stopped due to right margin of window */ | |
1949 | { | |
1950 | if (truncate) | |
1951 | { | |
1952 | *p1++ = truncator; | |
1953 | /* Truncating => start next line after next newline, | |
1954 | and point is on this line if it is before the newline, | |
1955 | and skip none of first char of next line */ | |
1956 | pos = find_next_newline (pos, 1); | |
1957 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1958 | ||
1959 | lastpos = pos - (FETCH_CHAR (pos - 1) == '\n'); | |
1960 | } | |
1961 | else | |
1962 | { | |
1963 | *p1++ = continuer; | |
1964 | val.vpos = 0; | |
1965 | lastpos--; | |
1966 | } | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 1971 | record its frame location now. */ |
a2889657 JB |
1972 | |
1973 | if (start <= point && point <= lastpos && cursor_vpos < 0) | |
1974 | { | |
1975 | cursor_vpos = vpos; | |
1976 | cursor_hpos = p1 - startp; | |
1977 | } | |
1978 | ||
1979 | if (cursor_vpos == vpos) | |
1980 | { | |
1981 | if (cursor_hpos < 0) cursor_hpos = 0; | |
1982 | if (cursor_hpos > width) cursor_hpos = width; | |
1983 | cursor_hpos += XFASTINT (w->left); | |
44fa5b1e | 1984 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 1985 | { |
44fa5b1e JB |
1986 | FRAME_CURSOR_Y (f) = cursor_vpos; |
1987 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 JB |
1988 | |
1989 | if (w == XWINDOW (selected_window)) | |
1990 | { | |
1991 | /* Line is not continued and did not start | |
1992 | in middle of character */ | |
1993 | if ((hpos - XFASTINT (w->left) | |
1994 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
1995 | && val.vpos) | |
1996 | { | |
1997 | this_line_bufpos = start; | |
1998 | this_line_buffer = current_buffer; | |
1999 | this_line_vpos = cursor_vpos; | |
2000 | this_line_start_hpos = hpos; | |
2001 | this_line_endpos = Z - lastpos; | |
2002 | } | |
2003 | else | |
2004 | this_line_bufpos = 0; | |
2005 | } | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
2010 | if (hscroll && lastpos != start) | |
2011 | { | |
2012 | *startp = truncator; | |
2013 | if (p1 <= startp) | |
2014 | p1 = startp + 1; | |
2015 | } | |
2016 | ||
44fa5b1e | 2017 | if (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)) |
a2889657 JB |
2018 | { |
2019 | endp++; | |
2020 | if (p1 < startp) p1 = startp; | |
2021 | while (p1 < endp) *p1++ = SPACEGLYPH; | |
b1d1124b | 2022 | |
88f22aff JB |
2023 | /* Don't draw vertical bars if we're using scroll bars. They're |
2024 | covered up by the scroll bars, and it's distracting to see | |
2025 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 2026 | reconfigured. */ |
88f22aff | 2027 | *p1++ = (FRAME_HAS_VERTICAL_SCROLL_BARS (f) |
b1d1124b | 2028 | ? ' ' : '|'); |
a2889657 JB |
2029 | } |
2030 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
2031 | p1 - desired_glyphs->glyphs[vpos]); | |
2032 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2033 | ||
2034 | /* If the start of this line is the overlay arrow-position, | |
2035 | then put the arrow string into the display-line. */ | |
2036 | ||
2037 | if (XTYPE (Voverlay_arrow_position) == Lisp_Marker | |
2038 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer | |
2039 | && start == marker_position (Voverlay_arrow_position) | |
2040 | && XTYPE (Voverlay_arrow_string) == Lisp_String | |
2041 | && ! overlay_arrow_seen) | |
2042 | { | |
2043 | unsigned char *p = XSTRING (Voverlay_arrow_string)->data; | |
2044 | int i; | |
2045 | int len = XSTRING (Voverlay_arrow_string)->size; | |
2046 | ||
b1d1124b JB |
2047 | if (len > width) |
2048 | len = width; | |
a2889657 JB |
2049 | for (i = 0; i < len; i++) |
2050 | startp[i] = p[i]; | |
2051 | if (desired_glyphs->used[vpos] < | |
2052 | (len + startp - desired_glyphs->glyphs[vpos])) | |
2053 | desired_glyphs->used[vpos] = len + startp - desired_glyphs->glyphs[vpos]; | |
2054 | ||
2055 | overlay_arrow_seen = 1; | |
2056 | } | |
2057 | ||
2058 | val.bufpos = pos; | |
2059 | val_display_text_line = val; | |
2060 | return &val_display_text_line; | |
2061 | } | |
2062 | \f | |
7ce2c095 RS |
2063 | /* Redisplay the menu bar in the frame for window W. */ |
2064 | ||
2065 | static void | |
2066 | display_menu_bar (w) | |
2067 | struct window *w; | |
2068 | { | |
2069 | Lisp_Object items, tail; | |
2070 | register int vpos = 0; | |
2071 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
2072 | int maxendcol = FRAME_WIDTH (f); | |
2073 | int hpos = 0; | |
2074 | ||
2075 | if (FRAME_MENU_BAR_LINES (f) <= 0) | |
2076 | return; | |
2077 | ||
2078 | get_display_line (f, vpos, 0); | |
2079 | ||
bd66d1ba RS |
2080 | /* If the user has switched buffers or windows, we need to |
2081 | recompute to reflect the new bindings. But we'll | |
2082 | recompute when update_mode_lines is set too; that means | |
2083 | that people can use force-mode-line-update to request | |
2084 | that the menu bar be recomputed. The adverse effect on | |
2085 | the rest of the redisplay algorithm is about the same as | |
2086 | windows_or_buffers_changed anyway. */ | |
2087 | if (windows_or_buffers_changed | |
2088 | || update_mode_lines | |
2089 | || (XFASTINT (w->last_modified) < MODIFF | |
2090 | && (XFASTINT (w->last_modified) | |
2091 | <= XBUFFER (w->buffer)->save_modified))) | |
2092 | { | |
2093 | struct buffer *prev = current_buffer; | |
2094 | current_buffer = XBUFFER (w->buffer); | |
2095 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (); | |
2096 | current_buffer = prev; | |
2097 | } | |
2098 | ||
2d66ad19 | 2099 | for (tail = FRAME_MENU_BAR_ITEMS (f); CONSP (tail); tail = XCONS (tail)->cdr) |
7ce2c095 RS |
2100 | { |
2101 | Lisp_Object string; | |
2d66ad19 | 2102 | |
7ce2c095 RS |
2103 | string = XCONS (XCONS (XCONS (tail)->car)->cdr)->car; |
2104 | ||
2105 | /* Record in each item its hpos. */ | |
2106 | XFASTINT (XCONS (XCONS (XCONS (tail)->car)->cdr)->cdr) = hpos; | |
2107 | ||
2108 | if (hpos < maxendcol) | |
2109 | hpos = display_string (XWINDOW (FRAME_ROOT_WINDOW (f)), vpos, | |
2110 | XSTRING (string)->data, | |
2d66ad19 RS |
2111 | hpos, 0, hpos, maxendcol); |
2112 | /* Put a gap of 3 spaces between items. */ | |
2113 | if (hpos < maxendcol) | |
2114 | { | |
2115 | int hpos1 = hpos + 3; | |
2116 | hpos = display_string (w, vpos, "", hpos, 0, | |
2117 | min (hpos1, maxendcol), maxendcol); | |
2118 | } | |
7ce2c095 RS |
2119 | } |
2120 | ||
2121 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
2122 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
2123 | |
2124 | /* Fill out the line with spaces. */ | |
2125 | if (maxendcol > hpos) | |
2126 | hpos = display_string (w, vpos, "", hpos, 0, maxendcol, -1); | |
7ce2c095 RS |
2127 | } |
2128 | \f | |
a2889657 JB |
2129 | /* Display the mode line for window w */ |
2130 | ||
2131 | static void | |
2132 | display_mode_line (w) | |
2133 | struct window *w; | |
2134 | { | |
2135 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
2136 | register int left = XFASTINT (w->left); | |
2137 | register int right = XFASTINT (w->width) + left; | |
44fa5b1e | 2138 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 2139 | |
aa6d10fa RS |
2140 | line_number_displayed = 0; |
2141 | ||
44fa5b1e | 2142 | get_display_line (f, vpos, left); |
a2889657 JB |
2143 | display_mode_element (w, vpos, left, 0, right, right, |
2144 | current_buffer->mode_line_format); | |
44fa5b1e | 2145 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 JB |
2146 | |
2147 | /* Make the mode line inverse video if the entire line | |
2148 | is made of mode lines. | |
2149 | I.e. if this window is full width, | |
2150 | or if it is the child of a full width window | |
2151 | (which implies that that window is split side-by-side | |
2152 | and the rest of this line is mode lines of the sibling windows). */ | |
44fa5b1e JB |
2153 | if (XFASTINT (w->width) == FRAME_WIDTH (f) |
2154 | || XFASTINT (XWINDOW (w->parent)->width) == FRAME_WIDTH (f)) | |
2155 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
a2889657 JB |
2156 | |
2157 | #ifdef HAVE_X_WINDOWS | |
2158 | /* I'm trying this out because I saw Unimpress use it, but it's | |
0956dd96 | 2159 | possible that this may mess adversely with some window managers. -jla |
a2889657 | 2160 | |
0956dd96 JB |
2161 | Wouldn't it be nice to use something like mode-line-format to |
2162 | describe frame titles? -JimB */ | |
2163 | ||
2164 | /* Change the title of the frame to the name of the buffer displayed | |
2165 | in the currently selected window. Don't do this for minibuffer frames, | |
2166 | and don't do it when there's only one non-minibuffer frame. */ | |
22aefb49 | 2167 | if (FRAME_X_P (f) |
44fa5b1e | 2168 | && ! FRAME_MINIBUF_ONLY_P (f) |
69ced0fa | 2169 | && w == XWINDOW (f->selected_window)) |
0956dd96 JB |
2170 | x_implicitly_set_name (f, (EQ (Fnext_frame (WINDOW_FRAME (w), Qnil), |
2171 | WINDOW_FRAME (w)) | |
2172 | ? Qnil | |
2173 | : XBUFFER (w->buffer)->name), | |
11e82b76 | 2174 | Qnil); |
a2889657 JB |
2175 | #endif |
2176 | } | |
2177 | ||
2178 | /* Contribute ELT to the mode line for window W. | |
2179 | How it translates into text depends on its data type. | |
2180 | ||
2181 | VPOS is the position of the mode line being displayed. | |
2182 | ||
44fa5b1e | 2183 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
2184 | should start. The output is truncated automatically at the right |
2185 | edge of window W. | |
2186 | ||
2187 | DEPTH is the depth in recursion. It is used to prevent | |
2188 | infinite recursion here. | |
2189 | ||
2190 | MINENDCOL is the hpos before which the element may not end. | |
2191 | The element is padded at the right with spaces if nec | |
2192 | to reach this column. | |
2193 | ||
2194 | MAXENDCOL is the hpos past which this element may not extend. | |
2195 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
2196 | (This is necessary to make nested padding and truncation work.) | |
2197 | ||
2198 | Returns the hpos of the end of the text generated by ELT. | |
2199 | The next element will receive that value as its HPOS arg, | |
2200 | so as to concatenate the elements. */ | |
2201 | ||
2202 | static int | |
2203 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
2204 | struct window *w; | |
2205 | register int vpos, hpos; | |
2206 | int depth; | |
2207 | int minendcol; | |
2208 | register int maxendcol; | |
2209 | register Lisp_Object elt; | |
2210 | { | |
2211 | tail_recurse: | |
2212 | if (depth > 10) | |
2213 | goto invalid; | |
2214 | ||
2215 | depth++; | |
2216 | ||
2217 | #ifdef SWITCH_ENUM_BUG | |
2218 | switch ((int) XTYPE (elt)) | |
2219 | #else | |
2220 | switch (XTYPE (elt)) | |
2221 | #endif | |
2222 | { | |
2223 | case Lisp_String: | |
2224 | { | |
2225 | /* A string: output it and check for %-constructs within it. */ | |
2226 | register unsigned char c; | |
2227 | register unsigned char *this = XSTRING (elt)->data; | |
2228 | ||
2229 | while (hpos < maxendcol && *this) | |
2230 | { | |
2231 | unsigned char *last = this; | |
2232 | while ((c = *this++) != '\0' && c != '%') | |
2233 | ; | |
2234 | if (this - 1 != last) | |
2235 | { | |
2236 | register int lim = --this - last + hpos; | |
2237 | hpos = display_string (w, vpos, last, hpos, 0, hpos, | |
2238 | min (lim, maxendcol)); | |
2239 | } | |
2240 | else /* c == '%' */ | |
2241 | { | |
2242 | register int spec_width = 0; | |
2243 | ||
2244 | /* We can't allow -ve args due to the "%-" construct */ | |
2245 | /* Argument specifies minwidth but not maxwidth | |
2246 | (maxwidth can be specified by | |
2247 | (<negative-number> . <stuff>) mode-line elements) */ | |
2248 | ||
2249 | while ((c = *this++) >= '0' && c <= '9') | |
2250 | { | |
2251 | spec_width = spec_width * 10 + (c - '0'); | |
2252 | } | |
2253 | ||
2254 | spec_width += hpos; | |
2255 | if (spec_width > maxendcol) | |
2256 | spec_width = maxendcol; | |
2257 | ||
2258 | if (c == 'M') | |
2259 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2260 | spec_width, maxendcol, | |
2261 | Vglobal_mode_string); | |
2262 | else if (c != 0) | |
2263 | hpos = display_string (w, vpos, | |
2264 | decode_mode_spec (w, c, | |
2265 | maxendcol - hpos), | |
2266 | hpos, 0, spec_width, maxendcol); | |
2267 | } | |
2268 | } | |
2269 | } | |
2270 | break; | |
2271 | ||
2272 | case Lisp_Symbol: | |
2273 | /* A symbol: process the value of the symbol recursively | |
2274 | as if it appeared here directly. Avoid error if symbol void. | |
2275 | Special case: if value of symbol is a string, output the string | |
2276 | literally. */ | |
2277 | { | |
2278 | register Lisp_Object tem; | |
2279 | tem = Fboundp (elt); | |
265a9e55 | 2280 | if (!NILP (tem)) |
a2889657 JB |
2281 | { |
2282 | tem = Fsymbol_value (elt); | |
2283 | /* If value is a string, output that string literally: | |
2284 | don't check for % within it. */ | |
2285 | if (XTYPE (tem) == Lisp_String) | |
2286 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
2287 | hpos, 0, minendcol, maxendcol); | |
2288 | /* Give up right away for nil or t. */ | |
2289 | else if (!EQ (tem, elt)) | |
2290 | { elt = tem; goto tail_recurse; } | |
2291 | } | |
2292 | } | |
2293 | break; | |
2294 | ||
2295 | case Lisp_Cons: | |
2296 | { | |
2297 | register Lisp_Object car, tem; | |
2298 | ||
2299 | /* A cons cell: three distinct cases. | |
2300 | If first element is a string or a cons, process all the elements | |
2301 | and effectively concatenate them. | |
2302 | If first element is a negative number, truncate displaying cdr to | |
2303 | at most that many characters. If positive, pad (with spaces) | |
2304 | to at least that many characters. | |
2305 | If first element is a symbol, process the cadr or caddr recursively | |
2306 | according to whether the symbol's value is non-nil or nil. */ | |
2307 | car = XCONS (elt)->car; | |
2308 | if (XTYPE (car) == Lisp_Symbol) | |
2309 | { | |
2310 | tem = Fboundp (car); | |
2311 | elt = XCONS (elt)->cdr; | |
2312 | if (XTYPE (elt) != Lisp_Cons) | |
2313 | goto invalid; | |
2314 | /* elt is now the cdr, and we know it is a cons cell. | |
2315 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 2316 | if (!NILP (tem)) |
a2889657 JB |
2317 | { |
2318 | tem = Fsymbol_value (car); | |
265a9e55 | 2319 | if (!NILP (tem)) |
a2889657 JB |
2320 | { elt = XCONS (elt)->car; goto tail_recurse; } |
2321 | } | |
2322 | /* Symbol's value is nil (or symbol is unbound) | |
2323 | Get the cddr of the original list | |
2324 | and if possible find the caddr and use that. */ | |
2325 | elt = XCONS (elt)->cdr; | |
265a9e55 | 2326 | if (NILP (elt)) |
a2889657 JB |
2327 | break; |
2328 | else if (XTYPE (elt) != Lisp_Cons) | |
2329 | goto invalid; | |
2330 | elt = XCONS (elt)->car; | |
2331 | goto tail_recurse; | |
2332 | } | |
2333 | else if (XTYPE (car) == Lisp_Int) | |
2334 | { | |
2335 | register int lim = XINT (car); | |
2336 | elt = XCONS (elt)->cdr; | |
2337 | if (lim < 0) | |
2338 | /* Negative int means reduce maximum width. | |
2339 | DO NOT change MINENDCOL here! | |
2340 | (20 -10 . foo) should truncate foo to 10 col | |
2341 | and then pad to 20. */ | |
2342 | maxendcol = min (maxendcol, hpos - lim); | |
2343 | else if (lim > 0) | |
2344 | { | |
2345 | /* Padding specified. Don't let it be more than | |
2346 | current maximum. */ | |
2347 | lim += hpos; | |
2348 | if (lim > maxendcol) | |
2349 | lim = maxendcol; | |
2350 | /* If that's more padding than already wanted, queue it. | |
2351 | But don't reduce padding already specified even if | |
2352 | that is beyond the current truncation point. */ | |
2353 | if (lim > minendcol) | |
2354 | minendcol = lim; | |
2355 | } | |
2356 | goto tail_recurse; | |
2357 | } | |
2358 | else if (XTYPE (car) == Lisp_String || XTYPE (car) == Lisp_Cons) | |
2359 | { | |
2360 | register int limit = 50; | |
2361 | /* LIMIT is to protect against circular lists. */ | |
2362 | while (XTYPE (elt) == Lisp_Cons && --limit > 0 | |
2363 | && hpos < maxendcol) | |
2364 | { | |
2365 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2366 | hpos, maxendcol, | |
2367 | XCONS (elt)->car); | |
2368 | elt = XCONS (elt)->cdr; | |
2369 | } | |
2370 | } | |
2371 | } | |
2372 | break; | |
2373 | ||
2374 | default: | |
2375 | invalid: | |
2376 | return (display_string (w, vpos, "*invalid*", hpos, 0, | |
2377 | minendcol, maxendcol)); | |
2378 | } | |
2379 | ||
2380 | end: | |
2381 | if (minendcol > hpos) | |
2382 | hpos = display_string (w, vpos, "", hpos, 0, minendcol, -1); | |
2383 | return hpos; | |
2384 | } | |
2385 | \f | |
2386 | /* Return a string for the output of a mode line %-spec for window W, | |
2387 | generated by character C and width MAXWIDTH. */ | |
2388 | ||
11e82b76 JB |
2389 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
2390 | ||
a2889657 JB |
2391 | static char * |
2392 | decode_mode_spec (w, c, maxwidth) | |
2393 | struct window *w; | |
2394 | register char c; | |
2395 | register int maxwidth; | |
2396 | { | |
2397 | Lisp_Object obj = Qnil; | |
44fa5b1e JB |
2398 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2399 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
a2889657 | 2400 | |
44fa5b1e JB |
2401 | if (maxwidth > FRAME_WIDTH (f)) |
2402 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
2403 | |
2404 | switch (c) | |
2405 | { | |
2406 | case 'b': | |
2407 | obj = current_buffer->name; | |
2408 | #if 0 | |
2409 | if (maxwidth >= 3 && XSTRING (obj)->size > maxwidth) | |
2410 | { | |
2411 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
2412 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
2413 | decode_mode_spec_buf[maxwidth] = '\0'; | |
2414 | return decode_mode_spec_buf; | |
2415 | } | |
2416 | #endif | |
2417 | break; | |
2418 | ||
2419 | case 'f': | |
2420 | obj = current_buffer->filename; | |
2421 | #if 0 | |
265a9e55 | 2422 | if (NILP (obj)) |
a2889657 JB |
2423 | return "[none]"; |
2424 | else if (XTYPE (obj) == Lisp_String && XSTRING (obj)->size > maxwidth) | |
2425 | { | |
2426 | bcopy ("...", decode_mode_spec_buf, 3); | |
2427 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size - maxwidth + 3, | |
2428 | decode_mode_spec_buf + 3, maxwidth - 3); | |
2429 | return decode_mode_spec_buf; | |
2430 | } | |
2431 | #endif | |
2432 | break; | |
2433 | ||
aa6d10fa RS |
2434 | case 'l': |
2435 | { | |
2436 | int startpos = marker_position (w->start); | |
2437 | int line, linepos, topline; | |
2438 | int nlines, junk; | |
2439 | Lisp_Object tem; | |
2440 | int height = XFASTINT (w->height); | |
2441 | ||
2442 | /* If we decided that this buffer isn't suitable for line numbers, | |
2443 | don't forget that too fast. */ | |
2444 | if (EQ (w->base_line_pos, w->buffer)) | |
2445 | return "??"; | |
2446 | ||
2447 | /* If the buffer is very big, don't waste time. */ | |
2448 | if (ZV - BEGV > line_number_display_limit) | |
2449 | { | |
2450 | w->base_line_pos = Qnil; | |
2451 | w->base_line_number = Qnil; | |
2452 | return "??"; | |
2453 | } | |
2454 | ||
2455 | if (!NILP (w->base_line_number) | |
2456 | && !NILP (w->base_line_pos) | |
2457 | && XFASTINT (w->base_line_pos) <= marker_position (w->start)) | |
2458 | { | |
2459 | line = XFASTINT (w->base_line_number); | |
2460 | linepos = XFASTINT (w->base_line_pos); | |
2461 | } | |
2462 | else | |
2463 | { | |
2464 | line = 1; | |
2465 | linepos = BEGV; | |
2466 | } | |
2467 | ||
2468 | /* Count lines from base line to window start position. */ | |
2469 | nlines = display_count_lines (linepos, startpos, startpos, &junk); | |
2470 | ||
2471 | topline = nlines + line; | |
2472 | ||
2473 | /* Determine a new base line, if the old one is too close | |
2474 | or too far away, or if we did not have one. | |
2475 | "Too close" means it's plausible a scroll-down would | |
2476 | go back past it. */ | |
2477 | if (startpos == BEGV) | |
2478 | { | |
2479 | XFASTINT (w->base_line_number) = topline; | |
2480 | XFASTINT (w->base_line_pos) = BEGV; | |
2481 | } | |
2482 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
2483 | || linepos == BEGV) | |
2484 | { | |
2485 | int limit = BEGV; | |
2486 | int position; | |
2487 | int distance = (height * 2 + 30) * 200; | |
2488 | ||
2489 | if (startpos - distance > limit) | |
2490 | limit = startpos - distance; | |
2491 | ||
2492 | nlines = display_count_lines (startpos, limit, | |
2493 | -(height * 2 + 30), | |
2494 | &position); | |
2495 | /* If we couldn't find the lines we wanted within | |
2496 | 200 chars per line, | |
2497 | give up on line numbers for this window. */ | |
2498 | if (position == startpos - distance) | |
2499 | { | |
2500 | w->base_line_pos = w->buffer; | |
2501 | w->base_line_number = Qnil; | |
2502 | return "??"; | |
2503 | } | |
2504 | ||
2505 | XFASTINT (w->base_line_number) = topline - nlines; | |
2506 | XFASTINT (w->base_line_pos) = position; | |
2507 | } | |
2508 | ||
2509 | /* Now count lines from the start pos to point. */ | |
2510 | nlines = display_count_lines (startpos, PT, PT, &junk); | |
2511 | ||
2512 | /* Record that we did display the line number. */ | |
2513 | line_number_displayed = 1; | |
2514 | ||
2515 | /* Make the string to show. */ | |
2516 | sprintf (decode_mode_spec_buf, "%d", topline + nlines); | |
2517 | return decode_mode_spec_buf; | |
2518 | } | |
2519 | break; | |
2520 | ||
a2889657 JB |
2521 | case 'm': |
2522 | obj = current_buffer->mode_name; | |
2523 | break; | |
2524 | ||
2525 | case 'n': | |
2526 | if (BEGV > BEG || ZV < Z) | |
2527 | return " Narrow"; | |
2528 | break; | |
2529 | ||
2530 | case '*': | |
265a9e55 | 2531 | if (!NILP (current_buffer->read_only)) |
a2889657 JB |
2532 | return "%"; |
2533 | if (MODIFF > current_buffer->save_modified) | |
2534 | return "*"; | |
2535 | return "-"; | |
2536 | ||
2537 | case 's': | |
2538 | /* status of process */ | |
a2889657 | 2539 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
265a9e55 | 2540 | if (NILP (obj)) |
a2889657 JB |
2541 | return "no process"; |
2542 | obj = Fsymbol_name (Fprocess_status (obj)); | |
2543 | break; | |
a2889657 JB |
2544 | |
2545 | case 'p': | |
2546 | { | |
2547 | int pos = marker_position (w->start); | |
2548 | int total = ZV - BEGV; | |
2549 | ||
2550 | if (XFASTINT (w->window_end_pos) <= Z - ZV) | |
2551 | { | |
2552 | if (pos <= BEGV) | |
2553 | return "All"; | |
2554 | else | |
2555 | return "Bottom"; | |
2556 | } | |
2557 | else if (pos <= BEGV) | |
2558 | return "Top"; | |
2559 | else | |
2560 | { | |
2561 | total = ((pos - BEGV) * 100 + total - 1) / total; | |
2562 | /* We can't normally display a 3-digit number, | |
2563 | so get us a 2-digit number that is close. */ | |
2564 | if (total == 100) | |
2565 | total = 99; | |
2566 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2567 | return decode_mode_spec_buf; | |
2568 | } | |
2569 | } | |
2570 | ||
2571 | case '%': | |
2572 | return "%"; | |
2573 | ||
2574 | case '[': | |
2575 | { | |
2576 | int i; | |
2577 | char *p; | |
2578 | ||
2579 | if (command_loop_level > 5) | |
2580 | return "[[[... "; | |
2581 | p = decode_mode_spec_buf; | |
2582 | for (i = 0; i < command_loop_level; i++) | |
2583 | *p++ = '['; | |
2584 | *p = 0; | |
2585 | return decode_mode_spec_buf; | |
2586 | } | |
2587 | ||
2588 | case ']': | |
2589 | { | |
2590 | int i; | |
2591 | char *p; | |
2592 | ||
2593 | if (command_loop_level > 5) | |
2594 | return " ...]]]"; | |
2595 | p = decode_mode_spec_buf; | |
2596 | for (i = 0; i < command_loop_level; i++) | |
2597 | *p++ = ']'; | |
2598 | *p = 0; | |
2599 | return decode_mode_spec_buf; | |
2600 | } | |
2601 | ||
2602 | case '-': | |
2603 | { | |
a2889657 JB |
2604 | register char *p; |
2605 | register int i; | |
2606 | ||
2607 | if (maxwidth < sizeof (lots_of_dashes)) | |
2608 | return lots_of_dashes; | |
2609 | else | |
2610 | { | |
2611 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
2612 | *p++ = '-'; | |
2613 | *p = '\0'; | |
2614 | } | |
2615 | return decode_mode_spec_buf; | |
2616 | } | |
2617 | } | |
2618 | ||
2619 | if (XTYPE (obj) == Lisp_String) | |
2620 | return (char *) XSTRING (obj)->data; | |
2621 | else | |
2622 | return ""; | |
2623 | } | |
aa6d10fa RS |
2624 | |
2625 | /* Count up to N lines starting from FROM. | |
2626 | But don't go beyond LIMIT. | |
2627 | Return the number of lines thus found (always positive). | |
2628 | Store the position after what was found into *POS_PTR. */ | |
2629 | ||
2630 | static int | |
2631 | display_count_lines (from, limit, n, pos_ptr) | |
2632 | int from, limit, n; | |
2633 | int *pos_ptr; | |
2634 | { | |
2635 | int oldbegv = BEGV; | |
2636 | int oldzv = ZV; | |
2637 | int shortage = 0; | |
2638 | ||
2639 | if (limit < from) | |
2640 | BEGV = limit; | |
2641 | else | |
2642 | ZV = limit; | |
2643 | ||
2644 | *pos_ptr = scan_buffer ('\n', from, n, &shortage); | |
2645 | ||
2646 | ZV = oldzv; | |
2647 | BEGV = oldbegv; | |
2648 | ||
2649 | if (n < 0) | |
2650 | /* When scanning backwards, scan_buffer stops *after* the last newline | |
2651 | it finds, but does count it. Compensate for that. */ | |
2652 | return - n - shortage - (*pos_ptr != limit); | |
2653 | return n - shortage; | |
2654 | } | |
a2889657 JB |
2655 | \f |
2656 | /* Display STRING on one line of window W, starting at HPOS. | |
2657 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 2658 | If VPOS == -1, display it as the current frame's title. |
a2889657 JB |
2659 | |
2660 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
2661 | ||
2662 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
2663 | MAXCOL is the last column ok to end at. Truncate here. | |
2664 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 2665 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
2666 | The right edge of W is an implicit maximum. |
2667 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
2668 | ||
2669 | Returns ending hpos */ | |
2670 | ||
2671 | static int | |
2672 | display_string (w, vpos, string, hpos, truncate, mincol, maxcol) | |
2673 | struct window *w; | |
2674 | unsigned char *string; | |
2675 | int vpos, hpos; | |
2676 | GLYPH truncate; | |
2677 | int mincol, maxcol; | |
2678 | { | |
2679 | register int c; | |
2680 | register GLYPH *p1; | |
2681 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 2682 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
2683 | register GLYPH *start; |
2684 | register GLYPH *end; | |
b1d1124b JB |
2685 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2686 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
2687 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
2688 | int window_width = XFASTINT (w->width); | |
2689 | ||
2690 | /* Use the standard display table, not the window's display table. | |
2691 | We don't want the mode line in rot13. */ | |
2692 | register struct Lisp_Vector *dp = 0; | |
2693 | ||
2694 | if (XTYPE (Vstandard_display_table) == Lisp_Vector | |
2695 | && XVECTOR (Vstandard_display_table)->size == DISP_TABLE_SIZE) | |
2696 | dp = XVECTOR (Vstandard_display_table); | |
2697 | ||
54ff581a | 2698 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
2699 | |
2700 | p1 = p1start; | |
2701 | start = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
2702 | end = start + window_width - (truncate != 0); | |
2703 | ||
b1d1124b JB |
2704 | if ((window_width + XFASTINT (w->left)) != FRAME_WIDTH (f)) |
2705 | { | |
88f22aff | 2706 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
b1d1124b JB |
2707 | { |
2708 | int i; | |
2709 | ||
88f22aff | 2710 | for (i = 0; i < VERTICAL_SCROLL_BAR_WIDTH; i++) |
b1d1124b JB |
2711 | *end-- = ' '; |
2712 | } | |
2713 | else | |
2714 | *end-- = '|'; | |
2715 | } | |
a2889657 JB |
2716 | |
2717 | if (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol) | |
2718 | end = desired_glyphs->glyphs[vpos] + maxcol; | |
2719 | if (maxcol >= 0 && mincol > maxcol) | |
2720 | mincol = maxcol; | |
2721 | ||
2722 | while (p1 < end) | |
2723 | { | |
2724 | c = *string++; | |
2725 | if (!c) break; | |
2726 | if (c >= 040 && c < 0177 | |
c581d710 | 2727 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
2728 | { |
2729 | if (p1 >= start) | |
2730 | *p1 = c; | |
2731 | p1++; | |
2732 | } | |
2733 | else if (c == '\t') | |
2734 | { | |
2735 | do | |
2736 | { | |
2737 | if (p1 >= start && p1 < end) | |
2738 | *p1 = SPACEGLYPH; | |
2739 | p1++; | |
2740 | } | |
2741 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
2742 | } | |
c581d710 | 2743 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
1c2250c2 | 2744 | p1 = copy_rope (p1, start, DISP_CHAR_VECTOR (dp, c), 0); |
ded34426 | 2745 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
2746 | { |
2747 | if (p1 >= start) | |
2748 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
2749 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
2750 | p1++; | |
6e8290aa | 2751 | if (p1 >= start && p1 < end) |
a2889657 JB |
2752 | *p1 = c ^ 0100; |
2753 | p1++; | |
2754 | } | |
2755 | else | |
2756 | { | |
2757 | if (p1 >= start) | |
2758 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
2759 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
2760 | p1++; | |
6e8290aa | 2761 | if (p1 >= start && p1 < end) |
a2889657 JB |
2762 | *p1 = (c >> 6) + '0'; |
2763 | p1++; | |
6e8290aa | 2764 | if (p1 >= start && p1 < end) |
a2889657 JB |
2765 | *p1 = (7 & (c >> 3)) + '0'; |
2766 | p1++; | |
6e8290aa | 2767 | if (p1 >= start && p1 < end) |
a2889657 JB |
2768 | *p1 = (7 & c) + '0'; |
2769 | p1++; | |
2770 | } | |
2771 | } | |
2772 | ||
2773 | if (c) | |
2774 | { | |
2775 | p1 = end; | |
2776 | if (truncate) *p1++ = truncate; | |
2777 | } | |
2778 | else if (mincol >= 0) | |
2779 | { | |
2780 | end = desired_glyphs->glyphs[vpos] + mincol; | |
2781 | while (p1 < end) | |
2782 | *p1++ = SPACEGLYPH; | |
2783 | } | |
2784 | ||
2785 | { | |
2786 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
2787 | ||
2788 | if (len > desired_glyphs->used[vpos]) | |
2789 | desired_glyphs->used[vpos] = len; | |
2790 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2791 | ||
2792 | return len; | |
2793 | } | |
2794 | } | |
2795 | \f | |
2796 | void | |
2797 | syms_of_xdisp () | |
2798 | { | |
2799 | staticpro (&last_arrow_position); | |
2800 | staticpro (&last_arrow_string); | |
2801 | last_arrow_position = Qnil; | |
2802 | last_arrow_string = Qnil; | |
2803 | ||
2804 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 2805 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
2806 | Vglobal_mode_string = Qnil; |
2807 | ||
2808 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
2809 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
2810 | This must be the beginning of a line in order to work.\n\ | |
2811 | See also `overlay-arrow-string'."); | |
2812 | Voverlay_arrow_position = Qnil; | |
2813 | ||
2814 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
2815 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
2816 | Voverlay_arrow_string = Qnil; | |
2817 | ||
2818 | DEFVAR_INT ("scroll-step", &scroll_step, | |
2819 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
2820 | If that fails to bring point back on frame, point is centered instead.\n\ |
2821 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 JB |
2822 | |
2823 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); | |
2824 | ||
2825 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
2826 | &truncate_partial_width_windows, | |
44fa5b1e | 2827 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
2828 | truncate_partial_width_windows = 1; |
2829 | ||
2830 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
2831 | "*Non-nil means use inverse video for the mode line."); | |
2832 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
2833 | |
2834 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
2835 | "*Maximum buffer size for which line number should be displayed."); | |
2836 | line_number_display_limit = 1000000; | |
a2889657 JB |
2837 | } |
2838 | ||
2839 | /* initialize the window system */ | |
2840 | init_xdisp () | |
2841 | { | |
2842 | Lisp_Object root_window; | |
2843 | #ifndef COMPILER_REGISTER_BUG | |
2844 | register | |
2845 | #endif /* COMPILER_REGISTER_BUG */ | |
2846 | struct window *mini_w; | |
2847 | ||
2848 | this_line_bufpos = 0; | |
2849 | ||
2850 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 2851 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
2852 | |
2853 | echo_area_glyphs = 0; | |
2854 | previous_echo_glyphs = 0; | |
2855 | ||
2856 | if (!noninteractive) | |
2857 | { | |
44fa5b1e | 2858 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
a2889657 | 2859 | XFASTINT (XWINDOW (root_window)->top) = 0; |
44fa5b1e JB |
2860 | set_window_height (root_window, FRAME_HEIGHT (f) - 1, 0); |
2861 | XFASTINT (mini_w->top) = FRAME_HEIGHT (f) - 1; | |
a2889657 JB |
2862 | set_window_height (minibuf_window, 1, 0); |
2863 | ||
44fa5b1e JB |
2864 | XFASTINT (XWINDOW (root_window)->width) = FRAME_WIDTH (f); |
2865 | XFASTINT (mini_w->width) = FRAME_WIDTH (f); | |
a2889657 JB |
2866 | } |
2867 | } |