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 | ||
fba9ce76 RS |
95 | /* Nonzero means highlight the region even in nonselected windows. */ |
96 | static int highlight_nonselected_windows; | |
97 | ||
44fa5b1e | 98 | /* If cursor motion alone moves point off frame, |
a2889657 JB |
99 | Try scrolling this many lines up or down if that will bring it back. */ |
100 | int scroll_step; | |
101 | ||
102 | /* Nonzero if try_window_id has made blank lines at window bottom | |
103 | since the last redisplay that paused */ | |
104 | static int blank_end_of_window; | |
105 | ||
106 | /* Number of windows showing the buffer of the selected window. | |
107 | keyboard.c refers to this. */ | |
108 | int buffer_shared; | |
109 | ||
44fa5b1e | 110 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
111 | whether the window is selected or not. |
112 | Set one to -1 first to determine whether point was found afterwards. */ | |
113 | ||
114 | static int cursor_vpos; | |
115 | static int cursor_hpos; | |
116 | ||
117 | int debug_end_pos; | |
118 | ||
119 | /* Nonzero means display mode line highlighted */ | |
120 | int mode_line_inverse_video; | |
121 | ||
122 | static void echo_area_display (); | |
123 | void mark_window_display_accurate (); | |
124 | static void redisplay_windows (); | |
125 | static void redisplay_window (); | |
126 | static void try_window (); | |
127 | static int try_window_id (); | |
128 | static struct position *display_text_line (); | |
129 | static void display_mode_line (); | |
130 | static int display_mode_element (); | |
131 | static char *fmodetrunc (); | |
132 | static char *decode_mode_spec (); | |
133 | static int display_string (); | |
7ce2c095 | 134 | static void display_menu_bar (); |
aa6d10fa | 135 | static int display_count_lines (); |
a2889657 JB |
136 | |
137 | /* Prompt to display in front of the minibuffer contents */ | |
138 | char *minibuf_prompt; | |
139 | ||
140 | /* Width in columns of current minibuffer prompt. */ | |
141 | int minibuf_prompt_width; | |
142 | ||
143 | /* Message to display instead of minibuffer contents | |
144 | This is what the functions error and message make, | |
145 | and command echoing uses it as well. | |
146 | It overrides the minibuf_prompt as well as the buffer. */ | |
147 | char *echo_area_glyphs; | |
148 | ||
149 | /* true iff we should redraw the mode lines on the next redisplay */ | |
150 | int update_mode_lines; | |
151 | ||
152 | /* Smallest number of characters before the gap | |
153 | at any time since last redisplay that finished. | |
154 | Valid for current buffer when try_window_id can be called. */ | |
155 | int beg_unchanged; | |
156 | ||
157 | /* Smallest number of characters after the gap | |
158 | at any time since last redisplay that finished. | |
159 | Valid for current buffer when try_window_id can be called. */ | |
160 | int end_unchanged; | |
161 | ||
162 | /* MODIFF as of last redisplay that finished; | |
163 | if it matches MODIFF, beg_unchanged and end_unchanged | |
164 | contain no useful information */ | |
165 | int unchanged_modified; | |
166 | ||
167 | /* Nonzero if head_clip or tail_clip of current buffer has changed | |
168 | since last redisplay that finished */ | |
169 | int clip_changed; | |
170 | ||
171 | /* Nonzero if window sizes or contents have changed | |
172 | since last redisplay that finished */ | |
173 | int windows_or_buffers_changed; | |
174 | ||
aa6d10fa RS |
175 | /* Nonzero after display_mode_line if %l was used |
176 | and it displayed a line number. */ | |
177 | int line_number_displayed; | |
178 | ||
179 | /* Maximum buffer size for which to display line numbers. */ | |
180 | int line_number_display_limit; | |
a2889657 | 181 | \f |
ded34426 JB |
182 | /* Specify m, a string, as a message in the minibuf. If m is 0, clear out |
183 | any existing message, and let the minibuffer text show through. */ | |
184 | void | |
185 | message1 (m) | |
186 | char *m; | |
187 | { | |
188 | if (noninteractive) | |
189 | { | |
190 | if (noninteractive_need_newline) | |
191 | putc ('\n', stderr); | |
192 | noninteractive_need_newline = 0; | |
c4f14ccb RS |
193 | if (cursor_in_echo_area != 0) |
194 | fprintf (stderr, "%s", m); | |
195 | else | |
196 | fprintf (stderr, "%s\n", m); | |
ded34426 JB |
197 | fflush (stderr); |
198 | } | |
199 | /* A null message buffer means that the frame hasn't really been | |
200 | initialized yet. Error messages get reported properly by | |
201 | cmd_error, so this must be just an informative message; toss it. */ | |
202 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
203 | { | |
204 | #ifdef MULTI_FRAME | |
205 | Lisp_Object minibuf_frame; | |
206 | ||
207 | choose_minibuf_frame (); | |
208 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); | |
d724d989 | 209 | FRAME_SAMPLE_VISIBILITY (XFRAME (minibuf_frame)); |
ded34426 JB |
210 | if (FRAME_VISIBLE_P (selected_frame) |
211 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
212 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
213 | #endif | |
214 | ||
215 | if (m) | |
216 | echo_area_glyphs = m; | |
217 | else | |
218 | echo_area_glyphs = previous_echo_glyphs = 0; | |
219 | ||
220 | do_pending_window_change (); | |
221 | echo_area_display (); | |
222 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); | |
223 | do_pending_window_change (); | |
224 | } | |
225 | } | |
226 | ||
44fa5b1e | 227 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
228 | zero if being used by message. */ |
229 | int message_buf_print; | |
230 | ||
81d478f3 JB |
231 | /* Dump an informative message to the minibuf. If m is 0, clear out |
232 | any existing message, and let the minibuffer text show through. */ | |
a2889657 | 233 | /* VARARGS 1 */ |
a2889657 JB |
234 | void |
235 | message (m, a1, a2, a3) | |
236 | char *m; | |
237 | { | |
238 | if (noninteractive) | |
239 | { | |
81d478f3 JB |
240 | if (m) |
241 | { | |
242 | if (noninteractive_need_newline) | |
243 | putc ('\n', stderr); | |
244 | noninteractive_need_newline = 0; | |
245 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
246 | if (cursor_in_echo_area == 0) |
247 | fprintf (stderr, "\n"); | |
81d478f3 JB |
248 | fflush (stderr); |
249 | } | |
a2889657 | 250 | } |
1f40cad2 | 251 | else if (INTERACTIVE) |
a2889657 | 252 | { |
1f40cad2 JB |
253 | /* The frame whose minibuffer we're going to display the message on. |
254 | It may be larger than the selected frame, so we need | |
255 | to use its buffer, not the selected frame's buffer. */ | |
256 | FRAME_PTR echo_frame; | |
257 | #ifdef MULTI_FRAME | |
258 | choose_minibuf_frame (); | |
259 | echo_frame = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
260 | #else | |
261 | echo_frame = selected_frame; | |
262 | #endif | |
263 | ||
264 | /* A null message buffer means that the frame hasn't really been | |
265 | initialized yet. Error messages get reported properly by | |
266 | cmd_error, so this must be just an informative message; toss it. */ | |
267 | if (FRAME_MESSAGE_BUF (echo_frame)) | |
81d478f3 | 268 | { |
1f40cad2 JB |
269 | if (m) |
270 | { | |
271 | { | |
a2889657 | 272 | #ifdef NO_ARG_ARRAY |
1f40cad2 JB |
273 | int a[3]; |
274 | a[0] = a1; | |
275 | a[1] = a2; | |
276 | a[2] = a3; | |
a2889657 | 277 | |
1f40cad2 JB |
278 | doprnt (FRAME_MESSAGE_BUF (echo_frame), |
279 | FRAME_WIDTH (echo_frame), m, 0, 3, a); | |
a2889657 | 280 | #else |
1f40cad2 JB |
281 | doprnt (FRAME_MESSAGE_BUF (echo_frame), |
282 | FRAME_WIDTH (echo_frame), m, 0, 3, &a1); | |
283 | #endif /* NO_ARG_ARRAY */ | |
284 | } | |
285 | ||
286 | message1 (FRAME_MESSAGE_BUF (echo_frame)); | |
287 | } | |
288 | else | |
289 | message1 (0); | |
290 | ||
291 | /* Print should start at the beginning of the message | |
292 | buffer next time. */ | |
293 | message_buf_print = 0; | |
81d478f3 | 294 | } |
a2889657 JB |
295 | } |
296 | } | |
297 | ||
298 | static void | |
299 | echo_area_display () | |
300 | { | |
301 | register int vpos; | |
44fa5b1e | 302 | FRAME_PTR f; |
a2889657 | 303 | |
44fa5b1e JB |
304 | #ifdef MULTI_FRAME |
305 | choose_minibuf_frame (); | |
b1d1124b JB |
306 | #endif |
307 | ||
44fa5b1e | 308 | f = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); |
a2889657 | 309 | |
44fa5b1e | 310 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 311 | return; |
a2889657 | 312 | |
44fa5b1e | 313 | if (frame_garbaged) |
a2889657 | 314 | { |
02a9b6e4 | 315 | redraw_garbaged_frames (); |
44fa5b1e | 316 | frame_garbaged = 0; |
a2889657 JB |
317 | } |
318 | ||
319 | if (echo_area_glyphs || minibuf_level == 0) | |
320 | { | |
321 | vpos = XFASTINT (XWINDOW (minibuf_window)->top); | |
44fa5b1e | 322 | get_display_line (f, vpos, 0); |
a2889657 JB |
323 | display_string (XWINDOW (minibuf_window), vpos, |
324 | echo_area_glyphs ? echo_area_glyphs : "", | |
44fa5b1e | 325 | 0, 0, 0, FRAME_WIDTH (f)); |
a2889657 JB |
326 | |
327 | /* If desired cursor location is on this line, put it at end of text */ | |
44fa5b1e JB |
328 | if (FRAME_CURSOR_Y (f) == vpos) |
329 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
daa37602 JB |
330 | |
331 | /* Fill the rest of the minibuffer window with blank lines. */ | |
332 | { | |
333 | int i; | |
334 | ||
b2a76982 RS |
335 | for (i = vpos + 1; |
336 | i < vpos + XFASTINT (XWINDOW (minibuf_window)->height); i++) | |
daa37602 | 337 | { |
44fa5b1e | 338 | get_display_line (f, i, 0); |
daa37602 | 339 | display_string (XWINDOW (minibuf_window), vpos, |
44fa5b1e | 340 | "", 0, 0, 0, FRAME_WIDTH (f)); |
daa37602 JB |
341 | } |
342 | } | |
a2889657 JB |
343 | } |
344 | else if (!EQ (minibuf_window, selected_window)) | |
345 | windows_or_buffers_changed++; | |
346 | ||
347 | if (EQ (minibuf_window, selected_window)) | |
348 | this_line_bufpos = 0; | |
349 | ||
350 | previous_echo_glyphs = echo_area_glyphs; | |
351 | } | |
352 | \f | |
44fa5b1e | 353 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
354 | This is the main external entry point for redisplay. |
355 | ||
356 | If the last redisplay displayed an echo area message and that | |
357 | message is no longer requested, we clear the echo area | |
358 | or bring back the minibuffer if that is in use. | |
359 | ||
360 | Everyone would like to have a hook here to call eval, | |
361 | but that cannot be done safely without a lot of changes elsewhere. | |
362 | This can be called from signal handlers; with alarms set up; | |
363 | or with synchronous processes running. | |
364 | See the function `echo' in keyboard.c. | |
365 | See Fcall_process; if you called it from here, it could be | |
366 | entered recursively. */ | |
367 | ||
368 | void | |
369 | redisplay () | |
370 | { | |
371 | register struct window *w = XWINDOW (selected_window); | |
372 | register int pause; | |
373 | int must_finish = 0; | |
374 | int all_windows; | |
375 | register int tlbufpos, tlendpos; | |
376 | struct position pos; | |
377 | extern int input_pending; | |
378 | ||
379 | if (noninteractive) | |
380 | return; | |
381 | ||
d724d989 JB |
382 | /* Set the visible flags for all frames. |
383 | Do this before checking for resized or garbaged frames; they want | |
384 | to know if their frames are visible. | |
385 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
386 | { | |
35f56f96 | 387 | Lisp_Object tail, frame; |
d724d989 | 388 | |
35f56f96 JB |
389 | FOR_EACH_FRAME (tail, frame) |
390 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
d724d989 JB |
391 | } |
392 | ||
44fa5b1e | 393 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
394 | do_pending_window_change (); |
395 | ||
44fa5b1e | 396 | if (frame_garbaged) |
a2889657 | 397 | { |
02a9b6e4 | 398 | redraw_garbaged_frames (); |
44fa5b1e | 399 | frame_garbaged = 0; |
a2889657 JB |
400 | } |
401 | ||
6e8290aa | 402 | /* Normally the message* functions will have already displayed and |
44fa5b1e | 403 | updated the echo area, but the frame may have been trashed, or |
6e8290aa JB |
404 | the update may have been preempted, so display the echo area |
405 | again here. */ | |
a2889657 JB |
406 | if (echo_area_glyphs || previous_echo_glyphs) |
407 | { | |
408 | echo_area_display (); | |
409 | must_finish = 1; | |
410 | } | |
411 | ||
412 | if (clip_changed || windows_or_buffers_changed) | |
413 | update_mode_lines++; | |
414 | ||
415 | /* Detect case that we need to write a star in the mode line. */ | |
416 | if (XFASTINT (w->last_modified) < MODIFF | |
417 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
418 | { | |
419 | w->update_mode_line = Qt; | |
420 | if (buffer_shared > 1) | |
421 | update_mode_lines++; | |
422 | } | |
423 | ||
44fa5b1e | 424 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
425 | |
426 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
427 | |
428 | /* If specs for an arrow have changed, do thorough redisplay | |
429 | to ensure we remove any arrow that should no longer exist. */ | |
ded34426 JB |
430 | if (! EQ (Voverlay_arrow_position, last_arrow_position) |
431 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
a2889657 JB |
432 | all_windows = 1, clip_changed = 1; |
433 | ||
bd66d1ba RS |
434 | /* If showing region, and mark has changed, must redisplay whole window. */ |
435 | if (((!NILP (Vtransient_mark_mode) | |
436 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
437 | != !NILP (w->region_showing)) | |
438 | || !EQ (w->region_showing, | |
439 | Fmarker_position (XBUFFER (w->buffer)->mark))) | |
440 | this_line_bufpos = -1; | |
441 | ||
a2889657 JB |
442 | tlbufpos = this_line_bufpos; |
443 | tlendpos = this_line_endpos; | |
265a9e55 | 444 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
44fa5b1e | 445 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
a2889657 JB |
446 | /* Make sure recorded data applies to current buffer, etc */ |
447 | && this_line_buffer == current_buffer | |
448 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 449 | && NILP (w->force_start) |
a2889657 JB |
450 | /* Point must be on the line that we have info recorded about */ |
451 | && point >= tlbufpos | |
452 | && point <= Z - tlendpos | |
453 | /* All text outside that line, including its final newline, | |
454 | must be unchanged */ | |
455 | && (XFASTINT (w->last_modified) >= MODIFF | |
456 | || (beg_unchanged >= tlbufpos - 1 | |
457 | && GPT >= tlbufpos | |
05ba02eb JB |
458 | /* If selective display, can't optimize |
459 | if the changes start at the beginning of the line. */ | |
460 | && ((XTYPE (current_buffer->selective_display) == Lisp_Int | |
461 | && XINT (current_buffer->selective_display) > 0 | |
462 | ? (beg_unchanged >= tlbufpos | |
463 | && GPT > tlbufpos) | |
464 | : 1)) | |
a2889657 JB |
465 | && end_unchanged >= tlendpos |
466 | && Z - GPT >= tlendpos))) | |
467 | { | |
468 | if (tlbufpos > BEGV && FETCH_CHAR (tlbufpos - 1) != '\n' | |
469 | && (tlbufpos == ZV | |
470 | || FETCH_CHAR (tlbufpos) == '\n')) | |
471 | /* Former continuation line has disappeared by becoming empty */ | |
472 | goto cancel; | |
473 | else if (XFASTINT (w->last_modified) < MODIFF | |
474 | || MINI_WINDOW_P (w)) | |
475 | { | |
476 | cursor_vpos = -1; | |
477 | overlay_arrow_seen = 0; | |
478 | display_text_line (w, tlbufpos, this_line_vpos, this_line_start_hpos, | |
479 | pos_tab_offset (w, tlbufpos)); | |
480 | /* If line contains point, is not continued, | |
481 | and ends at same distance from eob as before, we win */ | |
482 | if (cursor_vpos >= 0 && this_line_bufpos | |
483 | && this_line_endpos == tlendpos) | |
484 | { | |
44fa5b1e | 485 | if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
486 | preserve_other_columns (w); |
487 | goto update; | |
488 | } | |
489 | else | |
490 | goto cancel; | |
491 | } | |
492 | else if (point == XFASTINT (w->last_point)) | |
493 | { | |
494 | if (!must_finish) | |
495 | { | |
496 | do_pending_window_change (); | |
497 | return; | |
498 | } | |
499 | goto update; | |
500 | } | |
bd66d1ba RS |
501 | /* If highlighting the region, we can't just move the cursor. */ |
502 | else if (! (!NILP (Vtransient_mark_mode) | |
503 | && !NILP (current_buffer->mark_active)) | |
504 | && NILP (w->region_showing)) | |
a2889657 JB |
505 | { |
506 | pos = *compute_motion (tlbufpos, 0, | |
507 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
508 | point, 2, - (1 << (SHORTBITS - 1)), | |
b1d1124b | 509 | window_internal_width (w) - 1, |
de3e8b15 JB |
510 | XINT (w->hscroll), |
511 | pos_tab_offset (w, tlbufpos)); | |
a2889657 JB |
512 | if (pos.vpos < 1) |
513 | { | |
44fa5b1e | 514 | FRAME_CURSOR_X (selected_frame) |
a2889657 | 515 | = XFASTINT (w->left) + max (pos.hpos, 0); |
44fa5b1e | 516 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
517 | goto update; |
518 | } | |
519 | else | |
520 | goto cancel; | |
521 | } | |
522 | cancel: | |
523 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 524 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
525 | } |
526 | ||
527 | this_line_bufpos = 0; | |
528 | all_windows |= buffer_shared > 1; | |
529 | ||
530 | if (all_windows) | |
531 | { | |
35f56f96 | 532 | Lisp_Object tail, frame; |
a2889657 | 533 | |
31b24551 JB |
534 | #ifdef HAVE_X_WINDOWS |
535 | /* Since we're doing a thorough redisplay, we might as well | |
536 | recompute all our display faces. */ | |
537 | clear_face_vector (); | |
538 | #endif | |
539 | ||
a2889657 | 540 | /* Recompute # windows showing selected buffer. |
8de2d90b | 541 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
542 | buffer_shared = 0; |
543 | ||
35f56f96 | 544 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 545 | { |
35f56f96 JB |
546 | FRAME_PTR f = XFRAME (frame); |
547 | ||
88f22aff | 548 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
30c566e4 | 549 | we want when we redisplay their windows. */ |
88f22aff JB |
550 | if (condemn_scroll_bars_hook) |
551 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 JB |
552 | |
553 | if (FRAME_VISIBLE_P (f)) | |
554 | redisplay_windows (FRAME_ROOT_WINDOW (f)); | |
555 | ||
88f22aff | 556 | /* Any scroll bars which redisplay_windows should have nuked |
30c566e4 | 557 | should now go away. */ |
88f22aff JB |
558 | if (judge_scroll_bars_hook) |
559 | (*judge_scroll_bars_hook) (f); | |
30c566e4 | 560 | } |
a2889657 | 561 | } |
44fa5b1e | 562 | else if (FRAME_VISIBLE_P (selected_frame)) |
a2889657 JB |
563 | { |
564 | redisplay_window (selected_window, 1); | |
44fa5b1e | 565 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
566 | preserve_other_columns (w); |
567 | } | |
568 | ||
569 | update: | |
570 | /* Prevent various kinds of signals during display update. | |
571 | stdio is not robust about handling signals, | |
572 | which can cause an apparent I/O error. */ | |
573 | if (interrupt_input) | |
574 | unrequest_sigio (); | |
575 | stop_polling (); | |
576 | ||
44fa5b1e | 577 | #ifdef MULTI_FRAME |
a2889657 JB |
578 | if (all_windows) |
579 | { | |
580 | Lisp_Object tail; | |
581 | ||
582 | pause = 0; | |
583 | ||
44fa5b1e | 584 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 585 | { |
44fa5b1e | 586 | FRAME_PTR f; |
a2889657 | 587 | |
44fa5b1e | 588 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
589 | continue; |
590 | ||
44fa5b1e | 591 | f = XFRAME (XCONS (tail)->car); |
30c566e4 | 592 | if (FRAME_VISIBLE_P (f)) |
a2889657 | 593 | { |
44fa5b1e | 594 | pause |= update_frame (f, 0, 0); |
a2889657 | 595 | if (!pause) |
44fa5b1e | 596 | mark_window_display_accurate (f->root_window, 1); |
a2889657 JB |
597 | } |
598 | } | |
599 | } | |
600 | else | |
44fa5b1e | 601 | #endif /* MULTI_FRAME */ |
6e8290aa | 602 | { |
44fa5b1e JB |
603 | if (FRAME_VISIBLE_P (selected_frame)) |
604 | pause = update_frame (selected_frame, 0, 0); | |
d724d989 | 605 | |
8de2d90b | 606 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
607 | function. If the echo area is on another frame, that may |
608 | have put text on a frame other than the selected one, so the | |
609 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
610 | it here. */ |
611 | { | |
44fa5b1e JB |
612 | FRAME_PTR mini_frame = |
613 | XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b | 614 | |
44fa5b1e JB |
615 | if (mini_frame != selected_frame) |
616 | pause |= update_frame (mini_frame, 0, 0); | |
8de2d90b | 617 | } |
6e8290aa | 618 | } |
a2889657 | 619 | |
44fa5b1e | 620 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
621 | Also, don't forget to check every line to update the arrow. */ |
622 | if (pause) | |
623 | { | |
624 | this_line_bufpos = 0; | |
265a9e55 | 625 | if (!NILP (last_arrow_position)) |
a2889657 JB |
626 | { |
627 | last_arrow_position = Qt; | |
628 | last_arrow_string = Qt; | |
629 | } | |
44fa5b1e | 630 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
631 | may be null, so preserve_other_columns won't be able to |
632 | preserve all the vertical-bar separators. So, avoid using it | |
633 | in that case. */ | |
44fa5b1e | 634 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
635 | update_mode_lines = 1; |
636 | } | |
637 | ||
44fa5b1e | 638 | /* Now text on frame agrees with windows, so |
a2889657 JB |
639 | put info into the windows for partial redisplay to follow */ |
640 | ||
641 | if (!pause) | |
642 | { | |
643 | register struct buffer *b = XBUFFER (w->buffer); | |
644 | ||
645 | blank_end_of_window = 0; | |
646 | clip_changed = 0; | |
647 | unchanged_modified = BUF_MODIFF (b); | |
648 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); | |
649 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
650 | ||
651 | XFASTINT (w->last_point) = BUF_PT (b); | |
44fa5b1e JB |
652 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (selected_frame); |
653 | XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame); | |
a2889657 JB |
654 | |
655 | if (all_windows) | |
11e82b76 | 656 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
657 | else |
658 | { | |
659 | w->update_mode_line = Qnil; | |
660 | XFASTINT (w->last_modified) = BUF_MODIFF (b); | |
661 | w->window_end_valid = Qt; | |
662 | last_arrow_position = Voverlay_arrow_position; | |
663 | last_arrow_string = Voverlay_arrow_string; | |
664 | } | |
665 | update_mode_lines = 0; | |
666 | windows_or_buffers_changed = 0; | |
667 | } | |
668 | ||
669 | /* Start SIGIO interrupts coming again. | |
670 | Having them off during the code above | |
671 | makes it less likely one will discard output, | |
672 | but not impossible, since there might be stuff | |
673 | in the system buffer here. | |
674 | But it is much hairier to try to do anything about that. */ | |
675 | ||
676 | if (interrupt_input) | |
677 | request_sigio (); | |
678 | start_polling (); | |
679 | ||
44fa5b1e | 680 | /* Change frame size now if a change is pending. */ |
a2889657 JB |
681 | do_pending_window_change (); |
682 | } | |
683 | ||
684 | /* Redisplay, but leave alone any recent echo area message | |
685 | unless another message has been requested in its place. | |
686 | ||
687 | This is useful in situations where you need to redisplay but no | |
688 | user action has occurred, making it inappropriate for the message | |
689 | area to be cleared. See tracking_off and | |
690 | wait_reading_process_input for examples of these situations. */ | |
691 | ||
692 | redisplay_preserve_echo_area () | |
693 | { | |
694 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
695 | { | |
696 | echo_area_glyphs = previous_echo_glyphs; | |
697 | redisplay (); | |
698 | echo_area_glyphs = 0; | |
699 | } | |
700 | else | |
701 | redisplay (); | |
702 | } | |
703 | ||
704 | void | |
705 | mark_window_display_accurate (window, flag) | |
706 | Lisp_Object window; | |
707 | int flag; | |
708 | { | |
709 | register struct window *w; | |
710 | ||
265a9e55 | 711 | for (;!NILP (window); window = w->next) |
a2889657 | 712 | { |
ded34426 | 713 | if (XTYPE (window) != Lisp_Window) abort (); |
a2889657 JB |
714 | w = XWINDOW (window); |
715 | ||
265a9e55 | 716 | if (!NILP (w->buffer)) |
bd66d1ba RS |
717 | { |
718 | XFASTINT (w->last_modified) | |
719 | = !flag ? 0 | |
720 | : XBUFFER (w->buffer) == current_buffer | |
721 | ? MODIFF : BUF_MODIFF (XBUFFER (w->buffer)); | |
722 | ||
723 | /* Record if we are showing a region, so can make sure to | |
724 | update it fully at next redisplay. */ | |
725 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
726 | && !NILP (XBUFFER (w->buffer)->mark_active) | |
727 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
728 | : Qnil); | |
729 | } | |
730 | ||
a2889657 JB |
731 | w->window_end_valid = Qt; |
732 | w->update_mode_line = Qnil; | |
733 | ||
265a9e55 | 734 | if (!NILP (w->vchild)) |
a2889657 | 735 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 736 | if (!NILP (w->hchild)) |
a2889657 JB |
737 | mark_window_display_accurate (w->hchild, flag); |
738 | } | |
739 | ||
740 | if (flag) | |
741 | { | |
742 | last_arrow_position = Voverlay_arrow_position; | |
743 | last_arrow_string = Voverlay_arrow_string; | |
744 | } | |
745 | else | |
746 | { | |
747 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
748 | last_arrow_position = Qt; | |
749 | last_arrow_string = Qt; | |
750 | } | |
751 | } | |
752 | \f | |
753 | int do_id = 1; | |
754 | ||
755 | static void | |
756 | redisplay_windows (window) | |
757 | Lisp_Object window; | |
758 | { | |
265a9e55 | 759 | for (; !NILP (window); window = XWINDOW (window)->next) |
a2889657 JB |
760 | redisplay_window (window, 0); |
761 | } | |
762 | ||
763 | static void | |
764 | redisplay_window (window, just_this_one) | |
765 | Lisp_Object window; | |
766 | int just_this_one; | |
767 | { | |
768 | register struct window *w = XWINDOW (window); | |
30c566e4 | 769 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 JB |
770 | int height; |
771 | register int lpoint = point; | |
772 | struct buffer *old = current_buffer; | |
b1d1124b | 773 | register int width = window_internal_width (w) - 1; |
a2889657 JB |
774 | register int startp; |
775 | register int hscroll = XINT (w->hscroll); | |
776 | struct position pos; | |
b1d1124b | 777 | int opoint = point; |
a2889657 JB |
778 | int tem; |
779 | int window_needs_modeline; | |
780 | ||
44fa5b1e | 781 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
782 | |
783 | /* If this is a combination window, do its children; that's all. */ | |
784 | ||
265a9e55 | 785 | if (!NILP (w->vchild)) |
a2889657 JB |
786 | { |
787 | redisplay_windows (w->vchild); | |
788 | return; | |
789 | } | |
265a9e55 | 790 | if (!NILP (w->hchild)) |
a2889657 JB |
791 | { |
792 | redisplay_windows (w->hchild); | |
793 | return; | |
794 | } | |
265a9e55 | 795 | if (NILP (w->buffer)) |
a2889657 | 796 | abort (); |
8de2d90b JB |
797 | |
798 | height = window_internal_height (w); | |
799 | ||
800 | if (MINI_WINDOW_P (w)) | |
801 | { | |
802 | if (w == XWINDOW (minibuf_window)) | |
803 | { | |
804 | if (echo_area_glyphs) | |
805 | /* We've already displayed the echo area glyphs, if any. */ | |
88f22aff | 806 | goto finish_scroll_bars; |
8de2d90b JB |
807 | } |
808 | else | |
809 | { | |
810 | /* This is a minibuffer, but it's not the currently active one, so | |
811 | clear it. */ | |
44fa5b1e | 812 | int vpos = XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
8de2d90b JB |
813 | int i; |
814 | ||
815 | for (i = 0; i < height; i++) | |
816 | { | |
44fa5b1e | 817 | get_display_line (f, vpos + i, 0); |
8de2d90b JB |
818 | display_string (w, vpos + i, "", 0, 0, 0, width); |
819 | } | |
820 | ||
88f22aff | 821 | goto finish_scroll_bars; |
8de2d90b JB |
822 | } |
823 | } | |
a2889657 JB |
824 | |
825 | if (update_mode_lines) | |
826 | w->update_mode_line = Qt; | |
827 | ||
828 | /* Otherwise set up data on this window; select its buffer and point value */ | |
829 | ||
a2889657 JB |
830 | current_buffer = XBUFFER (w->buffer); |
831 | opoint = point; | |
832 | ||
833 | /* Count number of windows showing the selected buffer. */ | |
834 | ||
835 | if (!just_this_one | |
836 | && current_buffer == XBUFFER (XWINDOW (selected_window)->buffer)) | |
837 | buffer_shared++; | |
838 | ||
839 | /* POINT refers normally to the selected window. | |
840 | For any other window, set up appropriate value. */ | |
841 | ||
842 | if (!EQ (window, selected_window)) | |
843 | { | |
844 | SET_PT (marker_position (w->pointm)); | |
845 | if (point < BEGV) | |
846 | { | |
265a9e55 | 847 | SET_PT (BEGV); |
a2889657 JB |
848 | Fset_marker (w->pointm, make_number (point), Qnil); |
849 | } | |
850 | else if (point > (ZV - 1)) | |
851 | { | |
265a9e55 | 852 | SET_PT (ZV); |
a2889657 JB |
853 | Fset_marker (w->pointm, make_number (point), Qnil); |
854 | } | |
855 | } | |
856 | ||
857 | /* If window-start is screwed up, choose a new one. */ | |
a2889657 JB |
858 | if (XMARKER (w->start)->buffer != current_buffer) |
859 | goto recenter; | |
860 | ||
861 | startp = marker_position (w->start); | |
862 | ||
8de2d90b | 863 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 864 | unless the specified location is outside the accessible range. */ |
265a9e55 | 865 | if (!NILP (w->force_start)) |
a2889657 | 866 | { |
aa6d10fa RS |
867 | /* Forget any recorded base line for line number display. */ |
868 | w->base_line_number = Qnil; | |
a2889657 JB |
869 | w->update_mode_line = Qt; |
870 | w->force_start = Qnil; | |
871 | XFASTINT (w->last_modified) = 0; | |
8de2d90b JB |
872 | if (startp < BEGV) startp = BEGV; |
873 | if (startp > ZV) startp = ZV; | |
a2889657 JB |
874 | try_window (window, startp); |
875 | if (cursor_vpos < 0) | |
876 | { | |
bd66d1ba | 877 | /* ??? What should happen here if highlighting a region? */ |
a2889657 JB |
878 | /* If point does not appear, move point so it does appear */ |
879 | pos = *compute_motion (startp, 0, | |
880 | ((EQ (window, minibuf_window) && startp == 1) | |
881 | ? minibuf_prompt_width : 0) | |
882 | + | |
883 | (hscroll ? 1 - hscroll : 0), | |
884 | ZV, height / 2, | |
885 | - (1 << (SHORTBITS - 1)), | |
886 | width, hscroll, pos_tab_offset (w, startp)); | |
887 | SET_PT (pos.bufpos); | |
44fa5b1e | 888 | if (w != XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
889 | Fset_marker (w->pointm, make_number (point), Qnil); |
890 | else | |
891 | { | |
892 | lpoint = point; | |
44fa5b1e JB |
893 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
894 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
895 | } |
896 | } | |
897 | goto done; | |
898 | } | |
899 | ||
900 | /* Handle case where text has not changed, only point, | |
44fa5b1e | 901 | and it has not moved off the frame */ |
a2889657 JB |
902 | |
903 | /* This code is not used for minibuffer for the sake of | |
904 | the case of redisplaying to replace an echo area message; | |
905 | since in that case the minibuffer contents per se are usually unchanged. | |
906 | This code is of no real use in the minibuffer since | |
907 | the handling of this_line_bufpos, etc., | |
908 | in redisplay handles the same cases. */ | |
909 | ||
910 | if (XFASTINT (w->last_modified) >= MODIFF | |
911 | && point >= startp && !clip_changed | |
44fa5b1e | 912 | && (just_this_one || XFASTINT (w->width) == FRAME_WIDTH (f)) |
bd66d1ba RS |
913 | /* Can't use this case if highlighting a region. */ |
914 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
915 | && NILP (w->region_showing) | |
a2889657 JB |
916 | && !EQ (window, minibuf_window)) |
917 | { | |
918 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), | |
919 | point, height + 1, 10000, width, hscroll, | |
920 | pos_tab_offset (w, startp)); | |
921 | ||
922 | if (pos.vpos < height) | |
923 | { | |
44fa5b1e JB |
924 | /* Ok, point is still on frame */ |
925 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
926 | { |
927 | /* These variables are supposed to be origin 1 */ | |
44fa5b1e JB |
928 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
929 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
930 | } |
931 | /* This doesn't do the trick, because if a window to the right of | |
932 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 933 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 934 | redisplayed, making likes that are empty in this window's columns. |
44fa5b1e | 935 | if (XFASTINT (w->width) != FRAME_WIDTH (f)) |
a2889657 JB |
936 | preserve_my_columns (w); |
937 | */ | |
938 | goto done; | |
939 | } | |
940 | /* Don't bother trying redisplay with same start; | |
941 | we already know it will lose */ | |
942 | } | |
943 | /* If current starting point was originally the beginning of a line | |
944 | but no longer is, find a new starting point. */ | |
265a9e55 | 945 | else if (!NILP (w->start_at_line_beg) |
a2889657 JB |
946 | && !(startp == BEGV |
947 | || FETCH_CHAR (startp - 1) == '\n')) | |
948 | { | |
949 | goto recenter; | |
950 | } | |
951 | else if (just_this_one && !MINI_WINDOW_P (w) | |
952 | && point >= startp | |
953 | && XFASTINT (w->last_modified) | |
14709f21 JB |
954 | /* or else vmotion on first line won't work. */ |
955 | && ! NILP (w->start_at_line_beg) | |
a2889657 JB |
956 | && ! EQ (w->window_end_valid, Qnil) |
957 | && do_id && !clip_changed | |
958 | && !blank_end_of_window | |
44fa5b1e | 959 | && XFASTINT (w->width) == FRAME_WIDTH (f) |
bd66d1ba RS |
960 | /* Can't use this case if highlighting a region. */ |
961 | && !(!NILP (Vtransient_mark_mode) | |
962 | && !NILP (current_buffer->mark_active)) | |
963 | && NILP (w->region_showing) | |
a2889657 JB |
964 | && EQ (last_arrow_position, Voverlay_arrow_position) |
965 | && EQ (last_arrow_string, Voverlay_arrow_string) | |
44fa5b1e | 966 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
967 | && tem != -2) |
968 | { | |
969 | /* tem > 0 means success. tem == -1 means choose new start. | |
970 | tem == -2 means try again with same start, | |
971 | and nothing but whitespace follows the changed stuff. | |
972 | tem == 0 means try again with same start. */ | |
973 | if (tem > 0) | |
974 | goto done; | |
975 | } | |
976 | else if (startp >= BEGV && startp <= ZV | |
977 | /* Avoid starting display at end of buffer! */ | |
8de2d90b | 978 | && (startp < ZV || startp == BEGV |
a2889657 JB |
979 | || (XFASTINT (w->last_modified) >= MODIFF))) |
980 | { | |
981 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 982 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
983 | try_window (window, startp); |
984 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
985 | { |
986 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
987 | /* Forget any recorded base line for line number display. */ | |
988 | w->base_line_number = Qnil; | |
989 | goto done; | |
990 | } | |
a2889657 JB |
991 | else |
992 | cancel_my_columns (w); | |
993 | } | |
994 | ||
995 | XFASTINT (w->last_modified) = 0; | |
996 | w->update_mode_line = Qt; | |
997 | ||
998 | /* Try to scroll by specified few lines */ | |
999 | ||
1000 | if (scroll_step && !clip_changed) | |
1001 | { | |
1002 | if (point > startp) | |
1003 | { | |
1004 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1005 | scroll_step, width, hscroll, window); | |
1006 | if (pos.vpos >= height) | |
1007 | goto scroll_fail; | |
1008 | } | |
1009 | ||
1010 | pos = *vmotion (startp, point < startp ? - scroll_step : scroll_step, | |
1011 | width, hscroll, window); | |
1012 | ||
1013 | if (point >= pos.bufpos) | |
1014 | { | |
1015 | try_window (window, pos.bufpos); | |
1016 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
1017 | { |
1018 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
1019 | /* Forget any recorded base line for line number display. */ | |
1020 | w->base_line_number = Qnil; | |
1021 | goto done; | |
1022 | } | |
a2889657 JB |
1023 | else |
1024 | cancel_my_columns (w); | |
1025 | } | |
1026 | scroll_fail: ; | |
1027 | } | |
1028 | ||
1029 | /* Finally, just choose place to start which centers point */ | |
1030 | ||
1031 | recenter: | |
aa6d10fa RS |
1032 | /* Forget any previously recorded base line for line number display. */ |
1033 | w->base_line_number = Qnil; | |
1034 | ||
a2889657 JB |
1035 | pos = *vmotion (point, - height / 2, width, hscroll, window); |
1036 | try_window (window, pos.bufpos); | |
1037 | ||
1038 | startp = marker_position (w->start); | |
1039 | w->start_at_line_beg = | |
1040 | (startp == BEGV || FETCH_CHAR (startp - 1) == '\n') ? Qt : Qnil; | |
1041 | ||
1042 | done: | |
265a9e55 | 1043 | if ((!NILP (w->update_mode_line) |
aa6d10fa RS |
1044 | /* If window not full width, must redo its mode line |
1045 | if the window to its side is being redone */ | |
1046 | || (!just_this_one && width < FRAME_WIDTH (f) - 1) | |
1047 | || INTEGERP (w->base_line_pos)) | |
a2889657 JB |
1048 | && height != XFASTINT (w->height)) |
1049 | display_mode_line (w); | |
aa6d10fa RS |
1050 | if (! line_number_displayed |
1051 | && ! BUFFERP (w->base_line_pos)) | |
1052 | { | |
1053 | w->base_line_pos = Qnil; | |
1054 | w->base_line_number = Qnil; | |
1055 | } | |
a2889657 | 1056 | |
7ce2c095 RS |
1057 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
1058 | if (!NILP (w->update_mode_line) | |
1059 | && FRAME_MENU_BAR_LINES (f) > 0 | |
1060 | && EQ (FRAME_SELECTED_WINDOW (f), window)) | |
1061 | display_menu_bar (w); | |
1062 | ||
88f22aff JB |
1063 | finish_scroll_bars: |
1064 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 1065 | { |
b1d1124b | 1066 | int start, end, whole; |
30c566e4 | 1067 | |
b1d1124b | 1068 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
1069 | At some point, it would be nice to choose between scrollbars |
1070 | which reflect the whole buffer size, with special markers | |
1071 | indicating narrowing, and scrollbars which reflect only the | |
1072 | visible region. | |
1073 | ||
b1d1124b JB |
1074 | Note that minibuffers sometimes aren't displaying any text. */ |
1075 | if (! MINI_WINDOW_P (w) | |
1076 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
1077 | { | |
8a9311d7 | 1078 | whole = ZV - BEGV; |
6887f623 | 1079 | start = startp - BEGV; |
b1d1124b JB |
1080 | /* I don't think this is guaranteed to be right. For the |
1081 | moment, we'll pretend it is. */ | |
eebae3dd | 1082 | end = (Z - XINT (w->window_end_pos)); |
3505ea70 JB |
1083 | |
1084 | if (end < start) end = start; | |
8a9311d7 | 1085 | if (whole < (end - start)) whole = end - start; |
b1d1124b JB |
1086 | } |
1087 | else | |
1088 | start = end = whole = 0; | |
30c566e4 | 1089 | |
88f22aff JB |
1090 | /* Indicate what this scroll bar ought to be displaying now. */ |
1091 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start - 1); | |
30c566e4 | 1092 | |
88f22aff | 1093 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 1094 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 1095 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 1096 | } |
b1d1124b JB |
1097 | |
1098 | SET_PT (opoint); | |
1099 | current_buffer = old; | |
1100 | SET_PT (lpoint); | |
a2889657 JB |
1101 | } |
1102 | \f | |
1103 | /* Do full redisplay on one window, starting at position `pos'. */ | |
1104 | ||
1105 | static void | |
1106 | try_window (window, pos) | |
1107 | Lisp_Object window; | |
1108 | register int pos; | |
1109 | { | |
1110 | register struct window *w = XWINDOW (window); | |
1111 | register int height = window_internal_height (w); | |
1112 | register int vpos = XFASTINT (w->top); | |
1113 | register int last_text_vpos = vpos; | |
1114 | int tab_offset = pos_tab_offset (w, pos); | |
44fa5b1e | 1115 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 1116 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1117 | struct position val; |
1118 | ||
1119 | Fset_marker (w->start, make_number (pos), Qnil); | |
1120 | cursor_vpos = -1; | |
1121 | overlay_arrow_seen = 0; | |
1122 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1123 | ||
1124 | while (--height >= 0) | |
1125 | { | |
1126 | val = *display_text_line (w, pos, vpos, val.hpos, tab_offset); | |
1127 | tab_offset += width; | |
1128 | if (val.vpos) tab_offset = 0; | |
1129 | vpos++; | |
1130 | if (pos != val.bufpos) | |
1131 | last_text_vpos | |
1132 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1133 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1134 | pos = val.bufpos; | |
1135 | } | |
1136 | ||
1137 | /* If last line is continued in middle of character, | |
44fa5b1e | 1138 | include the split character in the text considered on the frame */ |
a2889657 JB |
1139 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
1140 | pos++; | |
1141 | ||
44fa5b1e | 1142 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1143 | if (XFASTINT (w->window_end_pos) == 0 |
1144 | && Z != pos) | |
1145 | w->update_mode_line = Qt; | |
1146 | ||
44fa5b1e | 1147 | /* Say where last char on frame will be, once redisplay is finished. */ |
a2889657 JB |
1148 | XFASTINT (w->window_end_pos) = Z - pos; |
1149 | XFASTINT (w->window_end_vpos) = last_text_vpos - XFASTINT (w->top); | |
1150 | /* But that is not valid info until redisplay finishes. */ | |
1151 | w->window_end_valid = Qnil; | |
1152 | } | |
1153 | \f | |
1154 | /* Try to redisplay when buffer is modified locally, | |
1155 | computing insert/delete line to preserve text outside | |
1156 | the bounds of the changes. | |
1157 | Return 1 if successful, 0 if if cannot tell what to do, | |
1158 | or -1 to tell caller to find a new window start, | |
1159 | or -2 to tell caller to do normal redisplay with same window start. */ | |
1160 | ||
1161 | static int | |
1162 | try_window_id (window) | |
1163 | Lisp_Object window; | |
1164 | { | |
1165 | int pos; | |
1166 | register struct window *w = XWINDOW (window); | |
1167 | register int height = window_internal_height (w); | |
44fa5b1e | 1168 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
1169 | int top = XFASTINT (w->top); |
1170 | int start = marker_position (w->start); | |
b1d1124b | 1171 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1172 | int hscroll = XINT (w->hscroll); |
1173 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
1174 | register int vpos; | |
1175 | register int i, tem; | |
1176 | int last_text_vpos = 0; | |
1177 | int stop_vpos; | |
1178 | ||
1179 | struct position val, bp, ep, xp, pp; | |
1180 | int scroll_amount = 0; | |
1181 | int delta; | |
1182 | int tab_offset, epto; | |
1183 | ||
1184 | if (GPT - BEG < beg_unchanged) | |
1185 | beg_unchanged = GPT - BEG; | |
1186 | if (Z - GPT < end_unchanged) | |
1187 | end_unchanged = Z - GPT; | |
1188 | ||
1189 | if (beg_unchanged + 1 < start) | |
1190 | return 0; /* Give up if changes go above top of window */ | |
1191 | ||
1192 | /* Find position before which nothing is changed. */ | |
1193 | bp = *compute_motion (start, 0, lmargin, | |
f7be7f78 | 1194 | beg_unchanged + 1, height + 1, 0, width, hscroll, |
a2889657 JB |
1195 | pos_tab_offset (w, start)); |
1196 | if (bp.vpos >= height) | |
6e8290aa JB |
1197 | { |
1198 | if (point < bp.bufpos && !bp.contin) | |
1199 | { | |
44fa5b1e JB |
1200 | /* All changes are below the frame, and point is on the frame. |
1201 | We don't need to change the frame at all. | |
6e8290aa JB |
1202 | But we need to update window_end_pos to account for |
1203 | any change in buffer size. */ | |
f7be7f78 JB |
1204 | bp = *compute_motion (start, 0, lmargin, |
1205 | Z, height, 0, | |
1206 | width, hscroll, pos_tab_offset (w, start)); | |
6e8290aa JB |
1207 | XFASTINT (w->window_end_vpos) = height; |
1208 | XFASTINT (w->window_end_pos) = Z - bp.bufpos; | |
1209 | return 1; | |
1210 | } | |
1211 | return 0; | |
1212 | } | |
a2889657 JB |
1213 | |
1214 | vpos = bp.vpos; | |
1215 | ||
44fa5b1e | 1216 | /* Find beginning of that frame line. Must display from there. */ |
a2889657 JB |
1217 | bp = *vmotion (bp.bufpos, 0, width, hscroll, window); |
1218 | ||
1219 | pos = bp.bufpos; | |
1220 | val.hpos = lmargin; | |
1221 | if (pos < start) | |
1222 | return -1; | |
1223 | ||
1224 | /* If about to start displaying at the beginning of a continuation line, | |
44fa5b1e | 1225 | really start with previous frame line, in case it was not |
a2889657 | 1226 | continued when last redisplayed */ |
05ba02eb JB |
1227 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
1228 | || | |
1229 | /* Likewise if we have to worry about selective display. */ | |
1230 | (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1231 | && XINT (current_buffer->selective_display) > 0 | |
1232 | && bp.bufpos - 1 == beg_unchanged && vpos > 0)) | |
a2889657 JB |
1233 | { |
1234 | bp = *vmotion (bp.bufpos, -1, width, hscroll, window); | |
1235 | --vpos; | |
1236 | pos = bp.bufpos; | |
1237 | } | |
1238 | ||
1239 | if (bp.contin && bp.hpos != lmargin) | |
1240 | { | |
1241 | val.hpos = bp.prevhpos - width + lmargin; | |
1242 | pos--; | |
1243 | } | |
1244 | ||
1245 | bp.vpos = vpos; | |
1246 | ||
1247 | /* Find first visible newline after which no more is changed. */ | |
1248 | tem = find_next_newline (Z - max (end_unchanged, Z - ZV), 1); | |
1249 | if (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1250 | && XINT (current_buffer->selective_display) > 0) | |
1251 | while (tem < ZV - 1 | |
1252 | && (position_indentation (tem) | |
1253 | >= XINT (current_buffer->selective_display))) | |
1254 | tem = find_next_newline (tem, 1); | |
1255 | ||
1256 | /* Compute the cursor position after that newline. */ | |
1257 | ep = *compute_motion (pos, vpos, val.hpos, tem, | |
1258 | height, - (1 << (SHORTBITS - 1)), | |
1259 | width, hscroll, pos_tab_offset (w, bp.bufpos)); | |
1260 | ||
44fa5b1e JB |
1261 | /* If changes reach past the text available on the frame, |
1262 | just display rest of frame. */ | |
a2889657 JB |
1263 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
1264 | stop_vpos = height; | |
1265 | else | |
1266 | stop_vpos = ep.vpos; | |
1267 | ||
1268 | /* If no newline before ep, the line ep is on includes some changes | |
1269 | that must be displayed. Make sure we don't stop before it. */ | |
1270 | /* Also, if changes reach all the way until ep.bufpos, | |
1271 | it is possible that something was deleted after the | |
1272 | newline before it, so the following line must be redrawn. */ | |
1273 | if (stop_vpos == ep.vpos | |
1274 | && (ep.bufpos == BEGV | |
1275 | || FETCH_CHAR (ep.bufpos - 1) != '\n' | |
1276 | || ep.bufpos == Z - end_unchanged)) | |
1277 | stop_vpos = ep.vpos + 1; | |
1278 | ||
1279 | cursor_vpos = -1; | |
1280 | overlay_arrow_seen = 0; | |
1281 | ||
1282 | /* If changes do not reach to bottom of window, | |
1283 | figure out how much to scroll the rest of the window */ | |
1284 | if (stop_vpos < height) | |
1285 | { | |
1286 | /* Now determine how far up or down the rest of the window has moved */ | |
1287 | epto = pos_tab_offset (w, ep.bufpos); | |
1288 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1289 | Z - XFASTINT (w->window_end_pos), | |
1290 | 10000, 0, width, hscroll, epto); | |
1291 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); | |
1292 | ||
44fa5b1e | 1293 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
1294 | If so, no scrolling is really necessary. */ |
1295 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
1296 | { | |
1297 | tem = FETCH_CHAR (i); | |
1298 | if (tem != ' ' && tem != '\n' && tem != '\t') | |
1299 | break; | |
1300 | } | |
1301 | if (i == xp.bufpos) | |
1302 | return -2; | |
1303 | ||
1304 | XFASTINT (w->window_end_vpos) += scroll_amount; | |
1305 | ||
44fa5b1e | 1306 | /* Before doing any scrolling, verify that point will be on frame. */ |
a2889657 JB |
1307 | if (point > ep.bufpos && !(point <= xp.bufpos && xp.bufpos < height)) |
1308 | { | |
1309 | if (point <= xp.bufpos) | |
1310 | { | |
1311 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1312 | point, height, - (1 << (SHORTBITS - 1)), | |
1313 | width, hscroll, epto); | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, | |
1318 | point, height, - (1 << (SHORTBITS - 1)), | |
1319 | width, hscroll, pos_tab_offset (w, xp.bufpos)); | |
1320 | } | |
1321 | if (pp.bufpos < point || pp.vpos == height) | |
1322 | return 0; | |
1323 | cursor_vpos = pp.vpos + top; | |
1324 | cursor_hpos = pp.hpos + XFASTINT (w->left); | |
1325 | } | |
1326 | ||
1327 | if (stop_vpos - scroll_amount >= height | |
1328 | || ep.bufpos == xp.bufpos) | |
1329 | { | |
1330 | if (scroll_amount < 0) | |
1331 | stop_vpos -= scroll_amount; | |
1332 | scroll_amount = 0; | |
1333 | /* In this path, we have altered window_end_vpos | |
1334 | and not left it negative. | |
1335 | We must make sure that, in case display is preempted | |
44fa5b1e | 1336 | before the frame changes to reflect what we do here, |
a2889657 | 1337 | further updates will not come to try_window_id |
44fa5b1e | 1338 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
1339 | blank_end_of_window = 1; |
1340 | } | |
1341 | else if (!scroll_amount) | |
1342 | {} | |
1343 | else if (bp.bufpos == Z - end_unchanged) | |
1344 | { | |
1345 | /* If reprinting everything is nearly as fast as scrolling, | |
1346 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 1347 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1348 | top + height - max (0, scroll_amount), |
1349 | scroll_amount) | |
1350 | > xp.bufpos - bp.bufpos - 20) | |
1351 | /* Return "try normal display with same window-start." | |
1352 | Too bad we can't prevent further scroll-thinking. */ | |
1353 | return -2; | |
1354 | /* If pure deletion, scroll up as many lines as possible. | |
1355 | In common case of killing a line, this can save the | |
1356 | following line from being overwritten by scrolling | |
1357 | and therefore having to be redrawn. */ | |
44fa5b1e | 1358 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1359 | top + height - max (0, scroll_amount), |
1360 | scroll_amount); | |
1361 | if (!tem) stop_vpos = height; | |
1362 | } | |
1363 | else if (scroll_amount) | |
1364 | { | |
1365 | /* If reprinting everything is nearly as fast as scrolling, | |
1366 | don't bother scrolling. Can happen if lines are short. */ | |
1367 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
1368 | overestimate of cost of reprinting, since xp.bufpos | |
1369 | would end up below the bottom of the window. */ | |
44fa5b1e | 1370 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1371 | top + height - max (0, scroll_amount), |
1372 | scroll_amount) | |
1373 | > xp.bufpos - ep.bufpos - 20) | |
1374 | /* Return "try normal display with same window-start." | |
1375 | Too bad we can't prevent further scroll-thinking. */ | |
1376 | return -2; | |
44fa5b1e | 1377 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1378 | top + height - max (0, scroll_amount), |
1379 | scroll_amount); | |
1380 | if (!tem) stop_vpos = height; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* In any case, do not display past bottom of window */ | |
1385 | if (stop_vpos >= height) | |
1386 | { | |
1387 | stop_vpos = height; | |
1388 | scroll_amount = 0; | |
1389 | } | |
1390 | ||
1391 | /* Handle case where pos is before w->start -- | |
1392 | can happen if part of line had been clipped and is not clipped now */ | |
1393 | if (vpos == 0 && pos < marker_position (w->start)) | |
1394 | Fset_marker (w->start, make_number (pos), Qnil); | |
1395 | ||
1396 | /* Redisplay the lines where the text was changed */ | |
1397 | last_text_vpos = vpos; | |
1398 | tab_offset = pos_tab_offset (w, pos); | |
1399 | /* If we are starting display in mid-character, correct tab_offset | |
1400 | to account for passing the line that that character really starts in. */ | |
1401 | if (val.hpos < lmargin) | |
1402 | tab_offset += width; | |
1403 | while (vpos < stop_vpos) | |
1404 | { | |
1405 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1406 | tab_offset += width; | |
1407 | if (val.vpos) tab_offset = 0; | |
1408 | if (pos != val.bufpos) | |
1409 | last_text_vpos | |
1410 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1411 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1412 | pos = val.bufpos; | |
1413 | } | |
1414 | ||
1415 | /* There are two cases: | |
1416 | 1) we have displayed down to the bottom of the window | |
1417 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
1418 | ||
1419 | if (vpos == height) | |
1420 | { | |
1421 | /* If last line is continued in middle of character, | |
44fa5b1e | 1422 | include the split character in the text considered on the frame */ |
a2889657 JB |
1423 | if (val.hpos < lmargin) |
1424 | val.bufpos++; | |
1425 | XFASTINT (w->window_end_vpos) = last_text_vpos; | |
1426 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1427 | } | |
1428 | ||
1429 | /* If scrolling made blank lines at window bottom, | |
1430 | redisplay to fill those lines */ | |
1431 | if (scroll_amount < 0) | |
1432 | { | |
1433 | /* Don't consider these lines for general-purpose scrolling. | |
1434 | That will save time in the scrolling computation. */ | |
44fa5b1e | 1435 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
1436 | vpos = xp.vpos; |
1437 | pos = xp.bufpos; | |
1438 | val.hpos = lmargin; | |
1439 | if (pos == ZV) | |
1440 | vpos = height + scroll_amount; | |
1441 | else if (xp.contin && xp.hpos != lmargin) | |
1442 | { | |
1443 | val.hpos = xp.prevhpos - width + lmargin; | |
1444 | pos--; | |
1445 | } | |
1446 | ||
1447 | blank_end_of_window = 1; | |
1448 | tab_offset = pos_tab_offset (w, pos); | |
1449 | /* If we are starting display in mid-character, correct tab_offset | |
1450 | to account for passing the line that that character starts in. */ | |
1451 | if (val.hpos < lmargin) | |
1452 | tab_offset += width; | |
1453 | ||
1454 | while (vpos < height) | |
1455 | { | |
1456 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1457 | tab_offset += width; | |
1458 | if (val.vpos) tab_offset = 0; | |
1459 | pos = val.bufpos; | |
1460 | } | |
1461 | ||
1462 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
1463 | Make it be fixed up, below. */ | |
1464 | if (xp.bufpos == ZV | |
1465 | && xp.bufpos == point) | |
1466 | cursor_vpos = -1; | |
1467 | } | |
1468 | ||
44fa5b1e | 1469 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1470 | if (XFASTINT (w->window_end_pos) == 0 |
1471 | && Z != val.bufpos) | |
1472 | w->update_mode_line = Qt; | |
1473 | ||
1474 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
1475 | if (scroll_amount) | |
1476 | { | |
1477 | delta = height - xp.vpos; | |
1478 | if (delta < 0 | |
1479 | || (delta > 0 && xp.bufpos <= ZV) | |
1480 | || (delta == 0 && xp.hpos)) | |
1481 | { | |
1482 | val = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1483 | delta, width, hscroll, window); | |
1484 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1485 | XFASTINT (w->window_end_vpos) += val.vpos; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | w->window_end_valid = Qnil; | |
1490 | ||
1491 | /* If point was not in a line that was displayed, find it */ | |
1492 | if (cursor_vpos < 0) | |
1493 | { | |
1494 | val = *compute_motion (start, 0, lmargin, point, 10000, 10000, | |
1495 | width, hscroll, pos_tab_offset (w, start)); | |
44fa5b1e | 1496 | /* Admit failure if point is off frame now */ |
a2889657 JB |
1497 | if (val.vpos >= height) |
1498 | { | |
1499 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 1500 | cancel_line (vpos + top, f); |
a2889657 JB |
1501 | return 0; |
1502 | } | |
1503 | cursor_vpos = val.vpos + top; | |
1504 | cursor_hpos = val.hpos + XFASTINT (w->left); | |
1505 | } | |
1506 | ||
44fa5b1e JB |
1507 | FRAME_CURSOR_X (f) = max (0, cursor_hpos); |
1508 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
a2889657 JB |
1509 | |
1510 | if (debug_end_pos) | |
1511 | { | |
1512 | val = *compute_motion (start, 0, lmargin, ZV, | |
1513 | height, - (1 << (SHORTBITS - 1)), | |
1514 | width, hscroll, pos_tab_offset (w, start)); | |
1515 | if (val.vpos != XFASTINT (w->window_end_vpos)) | |
1516 | abort (); | |
1517 | if (XFASTINT (w->window_end_pos) | |
1518 | != Z - val.bufpos) | |
1519 | abort (); | |
1520 | } | |
1521 | ||
1522 | return 1; | |
1523 | } | |
1524 | \f | |
31b24551 JB |
1525 | /* Mark a section of BUF as modified, but only for the sake of redisplay. |
1526 | This is useful for recording changes to overlays. | |
1527 | ||
1528 | We increment the buffer's modification timestamp and set the | |
1529 | redisplay caches (windows_or_buffers_changed, beg_unchanged, etc) | |
1530 | as if the region of text between START and END had been modified; | |
1531 | the redisplay code will check this against the windows' timestamps, | |
1532 | and redraw the appropriate area of the buffer. | |
1533 | ||
1534 | However, if the buffer is unmodified, we bump the last-save | |
1535 | timestamp as well, so that incrementing the timestamp doesn't fool | |
1536 | Emacs into thinking that the buffer's text has been modified. | |
1537 | ||
1538 | Tweaking the timestamps shouldn't hurt the first-modification | |
1539 | timestamps recorded in the undo records; those values aren't | |
1540 | written until just before a real text modification is made, so they | |
1541 | will never catch the timestamp value just before this function gets | |
1542 | called. */ | |
1543 | ||
1544 | void | |
1545 | redisplay_region (buf, start, end) | |
1546 | struct buffer *buf; | |
1547 | int start, end; | |
1548 | { | |
1549 | if (start == end) | |
1550 | return; | |
1551 | ||
1552 | if (start > end) | |
1553 | { | |
1554 | int temp = start; | |
1555 | start = end; end = temp; | |
1556 | } | |
1557 | ||
1558 | if (buf != current_buffer) | |
1559 | windows_or_buffers_changed = 1; | |
1560 | else | |
1561 | { | |
1562 | if (unchanged_modified == MODIFF) | |
1563 | { | |
1564 | beg_unchanged = start - BEG; | |
1565 | end_unchanged = Z - end; | |
1566 | } | |
1567 | else | |
1568 | { | |
1569 | if (Z - end < end_unchanged) | |
1570 | end_unchanged = Z - end; | |
1571 | if (start - BEG < beg_unchanged) | |
1572 | beg_unchanged = start - BEG; | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | /* Increment the buffer's time stamp, but also increment the save | |
1577 | and autosave timestamps, so as not to screw up that timekeeping. */ | |
1578 | if (BUF_MODIFF (buf) == buf->save_modified) | |
1579 | buf->save_modified++; | |
1580 | if (BUF_MODIFF (buf) == buf->auto_save_modified) | |
1581 | buf->auto_save_modified++; | |
1582 | ||
1583 | BUF_MODIFF (buf) ++; | |
1584 | } | |
1585 | ||
1586 | \f | |
c581d710 | 1587 | /* Copy glyphs from the vector FROM to the rope T. |
f7430cb6 | 1588 | But don't actually copy the parts that would come in before S. |
c581d710 | 1589 | Value is T, advanced past the copied data. */ |
a2889657 JB |
1590 | |
1591 | GLYPH * | |
1c2250c2 | 1592 | copy_rope (t, s, from, face) |
a2889657 JB |
1593 | register GLYPH *t; /* Copy to here. */ |
1594 | register GLYPH *s; /* Starting point. */ | |
1c2250c2 JB |
1595 | Lisp_Object from; /* Data to copy; known to be a vector. */ |
1596 | int face; /* Face to apply to glyphs which don't specify one. */ | |
a2889657 | 1597 | { |
c581d710 RS |
1598 | register int n = XVECTOR (from)->size; |
1599 | register Lisp_Object *f = XVECTOR (from)->contents; | |
1600 | ||
1601 | while (n--) | |
1602 | { | |
b2a76982 RS |
1603 | int glyph = XFASTINT (*f); |
1604 | ||
1605 | if (t >= s) *t = MAKE_GLYPH (GLYPH_CHAR (glyph), | |
1606 | (GLYPH_FACE (glyph) | |
1607 | ? GLYPH_FACE (glyph) | |
1c2250c2 | 1608 | : face)); |
c581d710 RS |
1609 | ++t; |
1610 | ++f; | |
1611 | } | |
1612 | return t; | |
1613 | } | |
1614 | ||
68a37fa8 RS |
1615 | /* Copy exactly LEN glyphs from FROM into data at T. |
1616 | But don't alter words before S. */ | |
c581d710 RS |
1617 | |
1618 | GLYPH * | |
1c2250c2 | 1619 | copy_part_of_rope (t, s, from, len, face) |
c581d710 RS |
1620 | register GLYPH *t; /* Copy to here. */ |
1621 | register GLYPH *s; /* Starting point. */ | |
1c2250c2 | 1622 | Lisp_Object *from; /* Data to copy. */ |
c581d710 | 1623 | int len; |
1c2250c2 | 1624 | int face; /* Face to apply to glyphs which don't specify one. */ |
c581d710 | 1625 | { |
68a37fa8 RS |
1626 | int n = len; |
1627 | register Lisp_Object *f = from; | |
a2889657 JB |
1628 | |
1629 | while (n--) | |
1630 | { | |
b2a76982 RS |
1631 | int glyph = XFASTINT (*f); |
1632 | ||
1633 | if (t >= s) *t = MAKE_GLYPH (GLYPH_CHAR (glyph), | |
1634 | (GLYPH_FACE (glyph) | |
1635 | ? GLYPH_FACE (glyph) | |
1c2250c2 | 1636 | : face)); |
a2889657 JB |
1637 | ++t; |
1638 | ++f; | |
1639 | } | |
1640 | return t; | |
1641 | } | |
1642 | \f | |
1643 | /* Display one line of window w, starting at position START in W's buffer. | |
1644 | Display starting at horizontal position HPOS, which is normally zero | |
1645 | or negative. A negative value causes output up to hpos = 0 to be discarded. | |
1646 | This is done for negative hscroll, or when this is a continuation line | |
1647 | and the continuation occurred in the middle of a multi-column character. | |
1648 | ||
1649 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
1650 | ||
44fa5b1e | 1651 | Display on position VPOS on the frame. (origin 0). |
a2889657 JB |
1652 | |
1653 | Returns a STRUCT POSITION giving character to start next line with | |
1654 | and where to display it, including a zero or negative hpos. | |
1655 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
1656 | ||
1657 | struct position val_display_text_line; | |
1658 | ||
1659 | static struct position * | |
1660 | display_text_line (w, start, vpos, hpos, taboffset) | |
1661 | struct window *w; | |
1662 | int start; | |
1663 | int vpos; | |
1664 | int hpos; | |
1665 | int taboffset; | |
1666 | { | |
1667 | register int pos = start; | |
1668 | register int c; | |
1669 | register GLYPH *p1; | |
1670 | int end; | |
1671 | register int pause; | |
1672 | register unsigned char *p; | |
1673 | GLYPH *endp; | |
1674 | register GLYPH *startp; | |
5fcbb24d | 1675 | register GLYPH *p1prev = 0; |
44fa5b1e | 1676 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 1677 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 1678 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 1679 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1680 | struct position val; |
1681 | int lastpos; | |
1682 | int invis; | |
1683 | int hscroll = XINT (w->hscroll); | |
1684 | int truncate = hscroll | |
1685 | || (truncate_partial_width_windows | |
44fa5b1e | 1686 | && XFASTINT (w->width) < FRAME_WIDTH (f)) |
265a9e55 | 1687 | || !NILP (current_buffer->truncate_lines); |
bd66d1ba RS |
1688 | |
1689 | /* 1 if we should highlight the region. */ | |
1690 | int highlight_region | |
1691 | = !NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active); | |
1692 | int region_beg, region_end; | |
1693 | ||
a2889657 JB |
1694 | int selective |
1695 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1696 | ? XINT (current_buffer->selective_display) | |
265a9e55 | 1697 | : !NILP (current_buffer->selective_display) ? -1 : 0; |
44fa5b1e | 1698 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
a2889657 | 1699 | register struct Lisp_Vector *dp = window_display_table (w); |
68a37fa8 RS |
1700 | |
1701 | Lisp_Object default_invis_vector[3]; | |
1702 | /* Nonzero means display something where there are invisible lines. | |
1703 | The precise value is the number of glyphs to display. */ | |
a2889657 | 1704 | int selective_rlen |
c581d710 | 1705 | = (selective && dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector |
68a37fa8 RS |
1706 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
1707 | : selective && !NILP (current_buffer->selective_display_ellipses) | |
1708 | ? 3 : 0); | |
1709 | /* This is the sequence of Lisp objects to display | |
1710 | when there are invisible lines. */ | |
1711 | Lisp_Object *invis_vector_contents | |
1712 | = (dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector | |
1713 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents | |
1714 | : default_invis_vector); | |
1715 | ||
a2889657 JB |
1716 | GLYPH truncator = (dp == 0 || XTYPE (DISP_TRUNC_GLYPH (dp)) != Lisp_Int |
1717 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); | |
1718 | GLYPH continuer = (dp == 0 || XTYPE (DISP_CONTINUE_GLYPH (dp)) != Lisp_Int | |
1719 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); | |
1720 | ||
31b24551 JB |
1721 | /* The next buffer location at which the face should change, due |
1722 | to overlays or text property changes. */ | |
1723 | int next_face_change; | |
1724 | ||
1725 | /* The face we're currently using. */ | |
1c2250c2 | 1726 | int current_face = 0; |
31b24551 | 1727 | |
68a37fa8 RS |
1728 | XFASTINT (default_invis_vector[2]) = '.'; |
1729 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; | |
1730 | ||
a2889657 | 1731 | hpos += XFASTINT (w->left); |
44fa5b1e | 1732 | get_display_line (f, vpos, XFASTINT (w->left)); |
54ff581a | 1733 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 1734 | |
bd66d1ba | 1735 | /* Show where to highlight the region. */ |
1613b757 | 1736 | if (highlight_region && XMARKER (current_buffer->mark)->buffer != 0 |
fba9ce76 RS |
1737 | /* Maybe highlight only in selected window. */ |
1738 | && (highlight_nonselected_windows | |
6f139a45 | 1739 | || w == XWINDOW (selected_window))) |
bd66d1ba RS |
1740 | { |
1741 | region_beg = marker_position (current_buffer->mark); | |
1742 | if (PT < region_beg) | |
1743 | { | |
1744 | region_end = region_beg; | |
1745 | region_beg = PT; | |
1746 | } | |
1747 | else | |
1748 | region_end = PT; | |
1749 | w->region_showing = Qt; | |
1750 | } | |
1751 | else | |
1752 | region_beg = region_end = -1; | |
1753 | ||
a2889657 JB |
1754 | if (MINI_WINDOW_P (w) && start == 1 |
1755 | && vpos == XFASTINT (w->top)) | |
1756 | { | |
1757 | if (minibuf_prompt) | |
1758 | hpos = display_string (w, vpos, minibuf_prompt, hpos, | |
1759 | (!truncate ? continuer : truncator), | |
1760 | -1, -1); | |
1761 | minibuf_prompt_width = hpos; | |
1762 | } | |
1763 | ||
1764 | desired_glyphs->bufp[vpos] = pos; | |
1765 | p1 = desired_glyphs->glyphs[vpos] + hpos; | |
1766 | end = ZV; | |
1767 | startp = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
1768 | endp = startp + width; | |
1769 | ||
1c2250c2 JB |
1770 | /* Arrange the overlays nicely for our purposes. Usually, we call |
1771 | display_text_line on only one line at a time, in which case this | |
1772 | can't really hurt too much, or we call it on lines which appear | |
1773 | one after another in the buffer, in which case all calls to | |
1774 | recenter_overlay_lists but the first will be pretty cheap. */ | |
1775 | recenter_overlay_lists (current_buffer, pos); | |
1776 | ||
a2889657 JB |
1777 | /* Loop generating characters. |
1778 | Stop at end of buffer, before newline, | |
31b24551 JB |
1779 | if reach or pass continuation column, |
1780 | or at face change. */ | |
a2889657 | 1781 | pause = pos; |
31b24551 | 1782 | next_face_change = pos; |
a2889657 JB |
1783 | while (p1 < endp) |
1784 | { | |
1785 | p1prev = p1; | |
31b24551 | 1786 | if (pos >= pause) |
a2889657 | 1787 | { |
31b24551 JB |
1788 | /* Did we hit the end of the visible region of the buffer? |
1789 | Stop here. */ | |
1790 | if (pos >= end) | |
a2889657 | 1791 | break; |
31b24551 JB |
1792 | |
1793 | /* Did we reach point? Record the cursor location. */ | |
a2889657 JB |
1794 | if (pos == point && cursor_vpos < 0) |
1795 | { | |
1796 | cursor_vpos = vpos; | |
1797 | cursor_hpos = p1 - startp; | |
1798 | } | |
1799 | ||
9dbd4b48 | 1800 | #ifdef HAVE_X_WINDOWS |
31b24551 JB |
1801 | /* Did we hit a face change? Figure out what face we should |
1802 | use now. We also hit this the first time through the | |
1803 | loop, to see what face we should start with. */ | |
a6c87ac8 | 1804 | if (pos == next_face_change && FRAME_X_P (f)) |
bd66d1ba RS |
1805 | current_face = compute_char_face (f, w, pos, |
1806 | region_beg, region_end, | |
1807 | &next_face_change); | |
9dbd4b48 | 1808 | #endif |
31b24551 | 1809 | |
1c2250c2 JB |
1810 | pause = end; |
1811 | ||
1812 | if (pos < next_face_change && next_face_change < pause) | |
1813 | pause = next_face_change; | |
1814 | ||
31b24551 JB |
1815 | /* Wouldn't you hate to read the next line to someone over |
1816 | the phone? */ | |
a2889657 JB |
1817 | if (pos < point && point < pause) |
1818 | pause = point; | |
1819 | if (pos < GPT && GPT < pause) | |
1820 | pause = GPT; | |
1821 | ||
1822 | p = &FETCH_CHAR (pos); | |
1823 | } | |
1824 | c = *p++; | |
1825 | if (c >= 040 && c < 0177 | |
c581d710 | 1826 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
1827 | { |
1828 | if (p1 >= startp) | |
1c2250c2 | 1829 | *p1 = MAKE_GLYPH (c, current_face); |
a2889657 JB |
1830 | p1++; |
1831 | } | |
1832 | else if (c == '\n') | |
1833 | { | |
1834 | invis = 0; | |
1835 | while (pos < end | |
1836 | && selective > 0 | |
1837 | && position_indentation (pos + 1) >= selective) | |
1838 | { | |
1839 | invis = 1; | |
1840 | pos = find_next_newline (pos + 1, 1); | |
1841 | if (FETCH_CHAR (pos - 1) == '\n') | |
1842 | pos--; | |
1843 | } | |
1844 | if (invis && selective_rlen > 0 && p1 >= startp) | |
1845 | { | |
1846 | p1 += selective_rlen; | |
1847 | if (p1 - startp > width) | |
1848 | p1 = endp; | |
68a37fa8 | 1849 | copy_part_of_rope (p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 1850 | (p1 - p1prev), current_face); |
a2889657 | 1851 | } |
3c5c35c5 JB |
1852 | #if 1 |
1853 | /* Draw the face of the newline character as extending all the | |
1854 | way to the end of the frame line. */ | |
1855 | if (current_face) | |
1856 | while (p1 < endp) | |
1857 | *p1++ = MAKE_GLYPH (' ', current_face); | |
1858 | #endif | |
68a37fa8 | 1859 | break; |
a2889657 JB |
1860 | } |
1861 | else if (c == '\t') | |
1862 | { | |
1863 | do | |
1864 | { | |
1865 | if (p1 >= startp && p1 < endp) | |
1c2250c2 | 1866 | *p1 = MAKE_GLYPH (' ', current_face); |
a2889657 JB |
1867 | p1++; |
1868 | } | |
1869 | while ((p1 - startp + taboffset + hscroll - (hscroll > 0)) | |
1870 | % tab_width); | |
1871 | } | |
6e8290aa | 1872 | else if (c == Ctl ('M') && selective == -1) |
a2889657 JB |
1873 | { |
1874 | pos = find_next_newline (pos, 1); | |
1875 | if (FETCH_CHAR (pos - 1) == '\n') | |
1876 | pos--; | |
1877 | if (selective_rlen > 0) | |
1878 | { | |
1879 | p1 += selective_rlen; | |
1880 | if (p1 - startp > width) | |
1881 | p1 = endp; | |
68a37fa8 | 1882 | copy_part_of_rope (p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 1883 | (p1 - p1prev), current_face); |
a2889657 | 1884 | } |
3c5c35c5 JB |
1885 | #if 1 |
1886 | /* Draw the face of the newline character as extending all the | |
1887 | way to the end of the frame line. */ | |
1888 | if (current_face) | |
1889 | while (p1 < endp) | |
1890 | *p1++ = MAKE_GLYPH (' ', current_face); | |
1891 | #endif | |
68a37fa8 | 1892 | break; |
a2889657 | 1893 | } |
c581d710 | 1894 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
a2889657 | 1895 | { |
1c2250c2 | 1896 | p1 = copy_rope (p1, startp, DISP_CHAR_VECTOR (dp, c), current_face); |
a2889657 JB |
1897 | } |
1898 | else if (c < 0200 && ctl_arrow) | |
1899 | { | |
1900 | if (p1 >= startp) | |
31b24551 JB |
1901 | *p1 = MAKE_GLYPH ((dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int |
1902 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
1c2250c2 | 1903 | current_face); |
a2889657 | 1904 | p1++; |
6e8290aa | 1905 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1906 | *p1 = MAKE_GLYPH (c ^ 0100, current_face); |
a2889657 JB |
1907 | p1++; |
1908 | } | |
1909 | else | |
1910 | { | |
1911 | if (p1 >= startp) | |
31b24551 JB |
1912 | *p1 = MAKE_GLYPH ((dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int |
1913 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
1c2250c2 | 1914 | current_face); |
a2889657 | 1915 | p1++; |
6e8290aa | 1916 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1917 | *p1 = MAKE_GLYPH ((c >> 6) + '0', current_face); |
a2889657 | 1918 | p1++; |
6e8290aa | 1919 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1920 | *p1 = MAKE_GLYPH ((7 & (c >> 3)) + '0', current_face); |
a2889657 | 1921 | p1++; |
6e8290aa | 1922 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 1923 | *p1 = MAKE_GLYPH ((7 & c) + '0', current_face); |
a2889657 JB |
1924 | p1++; |
1925 | } | |
31b24551 | 1926 | |
a2889657 JB |
1927 | pos++; |
1928 | } | |
1929 | ||
1930 | val.hpos = - XINT (w->hscroll); | |
1931 | if (val.hpos) | |
1932 | val.hpos++; | |
1933 | ||
1934 | val.vpos = 1; | |
1935 | ||
1936 | lastpos = pos; | |
1937 | ||
1938 | /* Handle continuation in middle of a character */ | |
1939 | /* by backing up over it */ | |
1940 | if (p1 > endp) | |
1941 | { | |
5fcbb24d JB |
1942 | /* Don't back up if we never actually displayed any text. |
1943 | This occurs when the minibuffer prompt takes up the whole line. */ | |
1944 | if (p1prev) | |
1945 | { | |
1946 | /* Start the next line with that same character */ | |
1947 | pos--; | |
1948 | /* but at negative hpos, to skip the columns output on this line. */ | |
1949 | val.hpos += p1prev - endp; | |
1950 | } | |
1951 | ||
a2889657 JB |
1952 | /* Keep in this line everything up to the continuation column. */ |
1953 | p1 = endp; | |
1954 | } | |
1955 | ||
1956 | /* Finish deciding which character to start the next line on, | |
1957 | and what hpos to start it at. | |
1958 | Also set `lastpos' to the last position which counts as "on this line" | |
1959 | for cursor-positioning. */ | |
1960 | ||
1961 | if (pos < ZV) | |
1962 | { | |
1963 | if (FETCH_CHAR (pos) == '\n') | |
1964 | /* If stopped due to a newline, start next line after it */ | |
1965 | pos++; | |
1966 | else | |
1967 | /* Stopped due to right margin of window */ | |
1968 | { | |
1969 | if (truncate) | |
1970 | { | |
1971 | *p1++ = truncator; | |
1972 | /* Truncating => start next line after next newline, | |
1973 | and point is on this line if it is before the newline, | |
1974 | and skip none of first char of next line */ | |
1975 | pos = find_next_newline (pos, 1); | |
1976 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1977 | ||
1978 | lastpos = pos - (FETCH_CHAR (pos - 1) == '\n'); | |
1979 | } | |
1980 | else | |
1981 | { | |
1982 | *p1++ = continuer; | |
1983 | val.vpos = 0; | |
1984 | lastpos--; | |
1985 | } | |
1986 | } | |
1987 | } | |
1988 | ||
1989 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 1990 | record its frame location now. */ |
a2889657 JB |
1991 | |
1992 | if (start <= point && point <= lastpos && cursor_vpos < 0) | |
1993 | { | |
1994 | cursor_vpos = vpos; | |
1995 | cursor_hpos = p1 - startp; | |
1996 | } | |
1997 | ||
1998 | if (cursor_vpos == vpos) | |
1999 | { | |
2000 | if (cursor_hpos < 0) cursor_hpos = 0; | |
2001 | if (cursor_hpos > width) cursor_hpos = width; | |
2002 | cursor_hpos += XFASTINT (w->left); | |
44fa5b1e | 2003 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 2004 | { |
44fa5b1e JB |
2005 | FRAME_CURSOR_Y (f) = cursor_vpos; |
2006 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 JB |
2007 | |
2008 | if (w == XWINDOW (selected_window)) | |
2009 | { | |
2010 | /* Line is not continued and did not start | |
2011 | in middle of character */ | |
2012 | if ((hpos - XFASTINT (w->left) | |
2013 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
2014 | && val.vpos) | |
2015 | { | |
2016 | this_line_bufpos = start; | |
2017 | this_line_buffer = current_buffer; | |
2018 | this_line_vpos = cursor_vpos; | |
2019 | this_line_start_hpos = hpos; | |
2020 | this_line_endpos = Z - lastpos; | |
2021 | } | |
2022 | else | |
2023 | this_line_bufpos = 0; | |
2024 | } | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
2029 | if (hscroll && lastpos != start) | |
2030 | { | |
2031 | *startp = truncator; | |
2032 | if (p1 <= startp) | |
2033 | p1 = startp + 1; | |
2034 | } | |
2035 | ||
44fa5b1e | 2036 | if (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)) |
a2889657 JB |
2037 | { |
2038 | endp++; | |
2039 | if (p1 < startp) p1 = startp; | |
2040 | while (p1 < endp) *p1++ = SPACEGLYPH; | |
b1d1124b | 2041 | |
88f22aff JB |
2042 | /* Don't draw vertical bars if we're using scroll bars. They're |
2043 | covered up by the scroll bars, and it's distracting to see | |
2044 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 2045 | reconfigured. */ |
88f22aff | 2046 | *p1++ = (FRAME_HAS_VERTICAL_SCROLL_BARS (f) |
b1d1124b | 2047 | ? ' ' : '|'); |
a2889657 JB |
2048 | } |
2049 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
2050 | p1 - desired_glyphs->glyphs[vpos]); | |
2051 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2052 | ||
2053 | /* If the start of this line is the overlay arrow-position, | |
2054 | then put the arrow string into the display-line. */ | |
2055 | ||
2056 | if (XTYPE (Voverlay_arrow_position) == Lisp_Marker | |
2057 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer | |
2058 | && start == marker_position (Voverlay_arrow_position) | |
2059 | && XTYPE (Voverlay_arrow_string) == Lisp_String | |
2060 | && ! overlay_arrow_seen) | |
2061 | { | |
2062 | unsigned char *p = XSTRING (Voverlay_arrow_string)->data; | |
2063 | int i; | |
2064 | int len = XSTRING (Voverlay_arrow_string)->size; | |
142be3dd | 2065 | int arrow_end; |
a2889657 | 2066 | |
b1d1124b JB |
2067 | if (len > width) |
2068 | len = width; | |
a2889657 JB |
2069 | for (i = 0; i < len; i++) |
2070 | startp[i] = p[i]; | |
142be3dd JB |
2071 | |
2072 | /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */ | |
2073 | arrow_end = (startp - desired_glyphs->glyphs[vpos]) + len; | |
2074 | if (desired_glyphs->used[vpos] < arrow_end) | |
2075 | desired_glyphs->used[vpos] = arrow_end; | |
a2889657 JB |
2076 | |
2077 | overlay_arrow_seen = 1; | |
2078 | } | |
2079 | ||
2080 | val.bufpos = pos; | |
2081 | val_display_text_line = val; | |
2082 | return &val_display_text_line; | |
2083 | } | |
2084 | \f | |
7ce2c095 RS |
2085 | /* Redisplay the menu bar in the frame for window W. */ |
2086 | ||
2087 | static void | |
2088 | display_menu_bar (w) | |
2089 | struct window *w; | |
2090 | { | |
2091 | Lisp_Object items, tail; | |
2092 | register int vpos = 0; | |
2093 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
2094 | int maxendcol = FRAME_WIDTH (f); | |
2095 | int hpos = 0; | |
2096 | ||
2097 | if (FRAME_MENU_BAR_LINES (f) <= 0) | |
2098 | return; | |
2099 | ||
2100 | get_display_line (f, vpos, 0); | |
2101 | ||
bd66d1ba RS |
2102 | /* If the user has switched buffers or windows, we need to |
2103 | recompute to reflect the new bindings. But we'll | |
2104 | recompute when update_mode_lines is set too; that means | |
2105 | that people can use force-mode-line-update to request | |
2106 | that the menu bar be recomputed. The adverse effect on | |
2107 | the rest of the redisplay algorithm is about the same as | |
2108 | windows_or_buffers_changed anyway. */ | |
2109 | if (windows_or_buffers_changed | |
2110 | || update_mode_lines | |
2111 | || (XFASTINT (w->last_modified) < MODIFF | |
2112 | && (XFASTINT (w->last_modified) | |
2113 | <= XBUFFER (w->buffer)->save_modified))) | |
2114 | { | |
2115 | struct buffer *prev = current_buffer; | |
2116 | current_buffer = XBUFFER (w->buffer); | |
2117 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (); | |
2118 | current_buffer = prev; | |
2119 | } | |
2120 | ||
2d66ad19 | 2121 | for (tail = FRAME_MENU_BAR_ITEMS (f); CONSP (tail); tail = XCONS (tail)->cdr) |
7ce2c095 RS |
2122 | { |
2123 | Lisp_Object string; | |
2d66ad19 | 2124 | |
7ce2c095 RS |
2125 | string = XCONS (XCONS (XCONS (tail)->car)->cdr)->car; |
2126 | ||
2127 | /* Record in each item its hpos. */ | |
2128 | XFASTINT (XCONS (XCONS (XCONS (tail)->car)->cdr)->cdr) = hpos; | |
2129 | ||
2130 | if (hpos < maxendcol) | |
2131 | hpos = display_string (XWINDOW (FRAME_ROOT_WINDOW (f)), vpos, | |
2132 | XSTRING (string)->data, | |
2d66ad19 RS |
2133 | hpos, 0, hpos, maxendcol); |
2134 | /* Put a gap of 3 spaces between items. */ | |
2135 | if (hpos < maxendcol) | |
2136 | { | |
2137 | int hpos1 = hpos + 3; | |
2138 | hpos = display_string (w, vpos, "", hpos, 0, | |
2139 | min (hpos1, maxendcol), maxendcol); | |
2140 | } | |
7ce2c095 RS |
2141 | } |
2142 | ||
2143 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
2144 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
2145 | |
2146 | /* Fill out the line with spaces. */ | |
2147 | if (maxendcol > hpos) | |
2148 | hpos = display_string (w, vpos, "", hpos, 0, maxendcol, -1); | |
7ce2c095 RS |
2149 | } |
2150 | \f | |
a2889657 JB |
2151 | /* Display the mode line for window w */ |
2152 | ||
2153 | static void | |
2154 | display_mode_line (w) | |
2155 | struct window *w; | |
2156 | { | |
2157 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
2158 | register int left = XFASTINT (w->left); | |
2159 | register int right = XFASTINT (w->width) + left; | |
44fa5b1e | 2160 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 2161 | |
aa6d10fa RS |
2162 | line_number_displayed = 0; |
2163 | ||
44fa5b1e | 2164 | get_display_line (f, vpos, left); |
a2889657 JB |
2165 | display_mode_element (w, vpos, left, 0, right, right, |
2166 | current_buffer->mode_line_format); | |
44fa5b1e | 2167 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 JB |
2168 | |
2169 | /* Make the mode line inverse video if the entire line | |
2170 | is made of mode lines. | |
2171 | I.e. if this window is full width, | |
2172 | or if it is the child of a full width window | |
2173 | (which implies that that window is split side-by-side | |
2174 | and the rest of this line is mode lines of the sibling windows). */ | |
44fa5b1e JB |
2175 | if (XFASTINT (w->width) == FRAME_WIDTH (f) |
2176 | || XFASTINT (XWINDOW (w->parent)->width) == FRAME_WIDTH (f)) | |
2177 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
a2889657 JB |
2178 | |
2179 | #ifdef HAVE_X_WINDOWS | |
2180 | /* I'm trying this out because I saw Unimpress use it, but it's | |
0956dd96 | 2181 | possible that this may mess adversely with some window managers. -jla |
a2889657 | 2182 | |
0956dd96 JB |
2183 | Wouldn't it be nice to use something like mode-line-format to |
2184 | describe frame titles? -JimB */ | |
2185 | ||
2186 | /* Change the title of the frame to the name of the buffer displayed | |
2187 | in the currently selected window. Don't do this for minibuffer frames, | |
2188 | and don't do it when there's only one non-minibuffer frame. */ | |
22aefb49 | 2189 | if (FRAME_X_P (f) |
44fa5b1e | 2190 | && ! FRAME_MINIBUF_ONLY_P (f) |
69ced0fa | 2191 | && w == XWINDOW (f->selected_window)) |
0956dd96 JB |
2192 | x_implicitly_set_name (f, (EQ (Fnext_frame (WINDOW_FRAME (w), Qnil), |
2193 | WINDOW_FRAME (w)) | |
2194 | ? Qnil | |
2195 | : XBUFFER (w->buffer)->name), | |
11e82b76 | 2196 | Qnil); |
a2889657 JB |
2197 | #endif |
2198 | } | |
2199 | ||
2200 | /* Contribute ELT to the mode line for window W. | |
2201 | How it translates into text depends on its data type. | |
2202 | ||
2203 | VPOS is the position of the mode line being displayed. | |
2204 | ||
44fa5b1e | 2205 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
2206 | should start. The output is truncated automatically at the right |
2207 | edge of window W. | |
2208 | ||
2209 | DEPTH is the depth in recursion. It is used to prevent | |
2210 | infinite recursion here. | |
2211 | ||
2212 | MINENDCOL is the hpos before which the element may not end. | |
2213 | The element is padded at the right with spaces if nec | |
2214 | to reach this column. | |
2215 | ||
2216 | MAXENDCOL is the hpos past which this element may not extend. | |
2217 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
2218 | (This is necessary to make nested padding and truncation work.) | |
2219 | ||
2220 | Returns the hpos of the end of the text generated by ELT. | |
2221 | The next element will receive that value as its HPOS arg, | |
2222 | so as to concatenate the elements. */ | |
2223 | ||
2224 | static int | |
2225 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
2226 | struct window *w; | |
2227 | register int vpos, hpos; | |
2228 | int depth; | |
2229 | int minendcol; | |
2230 | register int maxendcol; | |
2231 | register Lisp_Object elt; | |
2232 | { | |
2233 | tail_recurse: | |
2234 | if (depth > 10) | |
2235 | goto invalid; | |
2236 | ||
2237 | depth++; | |
2238 | ||
2239 | #ifdef SWITCH_ENUM_BUG | |
2240 | switch ((int) XTYPE (elt)) | |
2241 | #else | |
2242 | switch (XTYPE (elt)) | |
2243 | #endif | |
2244 | { | |
2245 | case Lisp_String: | |
2246 | { | |
2247 | /* A string: output it and check for %-constructs within it. */ | |
2248 | register unsigned char c; | |
2249 | register unsigned char *this = XSTRING (elt)->data; | |
2250 | ||
2251 | while (hpos < maxendcol && *this) | |
2252 | { | |
2253 | unsigned char *last = this; | |
2254 | while ((c = *this++) != '\0' && c != '%') | |
2255 | ; | |
2256 | if (this - 1 != last) | |
2257 | { | |
2258 | register int lim = --this - last + hpos; | |
2259 | hpos = display_string (w, vpos, last, hpos, 0, hpos, | |
2260 | min (lim, maxendcol)); | |
2261 | } | |
2262 | else /* c == '%' */ | |
2263 | { | |
2264 | register int spec_width = 0; | |
2265 | ||
2266 | /* We can't allow -ve args due to the "%-" construct */ | |
2267 | /* Argument specifies minwidth but not maxwidth | |
2268 | (maxwidth can be specified by | |
2269 | (<negative-number> . <stuff>) mode-line elements) */ | |
2270 | ||
2271 | while ((c = *this++) >= '0' && c <= '9') | |
2272 | { | |
2273 | spec_width = spec_width * 10 + (c - '0'); | |
2274 | } | |
2275 | ||
2276 | spec_width += hpos; | |
2277 | if (spec_width > maxendcol) | |
2278 | spec_width = maxendcol; | |
2279 | ||
2280 | if (c == 'M') | |
2281 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2282 | spec_width, maxendcol, | |
2283 | Vglobal_mode_string); | |
2284 | else if (c != 0) | |
2285 | hpos = display_string (w, vpos, | |
2286 | decode_mode_spec (w, c, | |
2287 | maxendcol - hpos), | |
2288 | hpos, 0, spec_width, maxendcol); | |
2289 | } | |
2290 | } | |
2291 | } | |
2292 | break; | |
2293 | ||
2294 | case Lisp_Symbol: | |
2295 | /* A symbol: process the value of the symbol recursively | |
2296 | as if it appeared here directly. Avoid error if symbol void. | |
2297 | Special case: if value of symbol is a string, output the string | |
2298 | literally. */ | |
2299 | { | |
2300 | register Lisp_Object tem; | |
2301 | tem = Fboundp (elt); | |
265a9e55 | 2302 | if (!NILP (tem)) |
a2889657 JB |
2303 | { |
2304 | tem = Fsymbol_value (elt); | |
2305 | /* If value is a string, output that string literally: | |
2306 | don't check for % within it. */ | |
2307 | if (XTYPE (tem) == Lisp_String) | |
2308 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
2309 | hpos, 0, minendcol, maxendcol); | |
2310 | /* Give up right away for nil or t. */ | |
2311 | else if (!EQ (tem, elt)) | |
2312 | { elt = tem; goto tail_recurse; } | |
2313 | } | |
2314 | } | |
2315 | break; | |
2316 | ||
2317 | case Lisp_Cons: | |
2318 | { | |
2319 | register Lisp_Object car, tem; | |
2320 | ||
2321 | /* A cons cell: three distinct cases. | |
2322 | If first element is a string or a cons, process all the elements | |
2323 | and effectively concatenate them. | |
2324 | If first element is a negative number, truncate displaying cdr to | |
2325 | at most that many characters. If positive, pad (with spaces) | |
2326 | to at least that many characters. | |
2327 | If first element is a symbol, process the cadr or caddr recursively | |
2328 | according to whether the symbol's value is non-nil or nil. */ | |
2329 | car = XCONS (elt)->car; | |
2330 | if (XTYPE (car) == Lisp_Symbol) | |
2331 | { | |
2332 | tem = Fboundp (car); | |
2333 | elt = XCONS (elt)->cdr; | |
2334 | if (XTYPE (elt) != Lisp_Cons) | |
2335 | goto invalid; | |
2336 | /* elt is now the cdr, and we know it is a cons cell. | |
2337 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 2338 | if (!NILP (tem)) |
a2889657 JB |
2339 | { |
2340 | tem = Fsymbol_value (car); | |
265a9e55 | 2341 | if (!NILP (tem)) |
a2889657 JB |
2342 | { elt = XCONS (elt)->car; goto tail_recurse; } |
2343 | } | |
2344 | /* Symbol's value is nil (or symbol is unbound) | |
2345 | Get the cddr of the original list | |
2346 | and if possible find the caddr and use that. */ | |
2347 | elt = XCONS (elt)->cdr; | |
265a9e55 | 2348 | if (NILP (elt)) |
a2889657 JB |
2349 | break; |
2350 | else if (XTYPE (elt) != Lisp_Cons) | |
2351 | goto invalid; | |
2352 | elt = XCONS (elt)->car; | |
2353 | goto tail_recurse; | |
2354 | } | |
2355 | else if (XTYPE (car) == Lisp_Int) | |
2356 | { | |
2357 | register int lim = XINT (car); | |
2358 | elt = XCONS (elt)->cdr; | |
2359 | if (lim < 0) | |
2360 | /* Negative int means reduce maximum width. | |
2361 | DO NOT change MINENDCOL here! | |
2362 | (20 -10 . foo) should truncate foo to 10 col | |
2363 | and then pad to 20. */ | |
2364 | maxendcol = min (maxendcol, hpos - lim); | |
2365 | else if (lim > 0) | |
2366 | { | |
2367 | /* Padding specified. Don't let it be more than | |
2368 | current maximum. */ | |
2369 | lim += hpos; | |
2370 | if (lim > maxendcol) | |
2371 | lim = maxendcol; | |
2372 | /* If that's more padding than already wanted, queue it. | |
2373 | But don't reduce padding already specified even if | |
2374 | that is beyond the current truncation point. */ | |
2375 | if (lim > minendcol) | |
2376 | minendcol = lim; | |
2377 | } | |
2378 | goto tail_recurse; | |
2379 | } | |
2380 | else if (XTYPE (car) == Lisp_String || XTYPE (car) == Lisp_Cons) | |
2381 | { | |
2382 | register int limit = 50; | |
2383 | /* LIMIT is to protect against circular lists. */ | |
2384 | while (XTYPE (elt) == Lisp_Cons && --limit > 0 | |
2385 | && hpos < maxendcol) | |
2386 | { | |
2387 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2388 | hpos, maxendcol, | |
2389 | XCONS (elt)->car); | |
2390 | elt = XCONS (elt)->cdr; | |
2391 | } | |
2392 | } | |
2393 | } | |
2394 | break; | |
2395 | ||
2396 | default: | |
2397 | invalid: | |
2398 | return (display_string (w, vpos, "*invalid*", hpos, 0, | |
2399 | minendcol, maxendcol)); | |
2400 | } | |
2401 | ||
2402 | end: | |
2403 | if (minendcol > hpos) | |
2404 | hpos = display_string (w, vpos, "", hpos, 0, minendcol, -1); | |
2405 | return hpos; | |
2406 | } | |
2407 | \f | |
2408 | /* Return a string for the output of a mode line %-spec for window W, | |
2409 | generated by character C and width MAXWIDTH. */ | |
2410 | ||
11e82b76 JB |
2411 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
2412 | ||
a2889657 JB |
2413 | static char * |
2414 | decode_mode_spec (w, c, maxwidth) | |
2415 | struct window *w; | |
2416 | register char c; | |
2417 | register int maxwidth; | |
2418 | { | |
2419 | Lisp_Object obj = Qnil; | |
44fa5b1e JB |
2420 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2421 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
a2889657 | 2422 | |
44fa5b1e JB |
2423 | if (maxwidth > FRAME_WIDTH (f)) |
2424 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
2425 | |
2426 | switch (c) | |
2427 | { | |
2428 | case 'b': | |
2429 | obj = current_buffer->name; | |
2430 | #if 0 | |
2431 | if (maxwidth >= 3 && XSTRING (obj)->size > maxwidth) | |
2432 | { | |
2433 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
2434 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
2435 | decode_mode_spec_buf[maxwidth] = '\0'; | |
2436 | return decode_mode_spec_buf; | |
2437 | } | |
2438 | #endif | |
2439 | break; | |
2440 | ||
2441 | case 'f': | |
2442 | obj = current_buffer->filename; | |
2443 | #if 0 | |
265a9e55 | 2444 | if (NILP (obj)) |
a2889657 JB |
2445 | return "[none]"; |
2446 | else if (XTYPE (obj) == Lisp_String && XSTRING (obj)->size > maxwidth) | |
2447 | { | |
2448 | bcopy ("...", decode_mode_spec_buf, 3); | |
2449 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size - maxwidth + 3, | |
2450 | decode_mode_spec_buf + 3, maxwidth - 3); | |
2451 | return decode_mode_spec_buf; | |
2452 | } | |
2453 | #endif | |
2454 | break; | |
2455 | ||
aa6d10fa RS |
2456 | case 'l': |
2457 | { | |
2458 | int startpos = marker_position (w->start); | |
2459 | int line, linepos, topline; | |
2460 | int nlines, junk; | |
2461 | Lisp_Object tem; | |
2462 | int height = XFASTINT (w->height); | |
2463 | ||
2464 | /* If we decided that this buffer isn't suitable for line numbers, | |
2465 | don't forget that too fast. */ | |
2466 | if (EQ (w->base_line_pos, w->buffer)) | |
2467 | return "??"; | |
2468 | ||
2469 | /* If the buffer is very big, don't waste time. */ | |
2470 | if (ZV - BEGV > line_number_display_limit) | |
2471 | { | |
2472 | w->base_line_pos = Qnil; | |
2473 | w->base_line_number = Qnil; | |
2474 | return "??"; | |
2475 | } | |
2476 | ||
2477 | if (!NILP (w->base_line_number) | |
2478 | && !NILP (w->base_line_pos) | |
2479 | && XFASTINT (w->base_line_pos) <= marker_position (w->start)) | |
2480 | { | |
2481 | line = XFASTINT (w->base_line_number); | |
2482 | linepos = XFASTINT (w->base_line_pos); | |
2483 | } | |
2484 | else | |
2485 | { | |
2486 | line = 1; | |
2487 | linepos = BEGV; | |
2488 | } | |
2489 | ||
2490 | /* Count lines from base line to window start position. */ | |
2491 | nlines = display_count_lines (linepos, startpos, startpos, &junk); | |
2492 | ||
2493 | topline = nlines + line; | |
2494 | ||
2495 | /* Determine a new base line, if the old one is too close | |
2496 | or too far away, or if we did not have one. | |
2497 | "Too close" means it's plausible a scroll-down would | |
2498 | go back past it. */ | |
2499 | if (startpos == BEGV) | |
2500 | { | |
2501 | XFASTINT (w->base_line_number) = topline; | |
2502 | XFASTINT (w->base_line_pos) = BEGV; | |
2503 | } | |
2504 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
2505 | || linepos == BEGV) | |
2506 | { | |
2507 | int limit = BEGV; | |
2508 | int position; | |
2509 | int distance = (height * 2 + 30) * 200; | |
2510 | ||
2511 | if (startpos - distance > limit) | |
2512 | limit = startpos - distance; | |
2513 | ||
2514 | nlines = display_count_lines (startpos, limit, | |
2515 | -(height * 2 + 30), | |
2516 | &position); | |
2517 | /* If we couldn't find the lines we wanted within | |
2518 | 200 chars per line, | |
2519 | give up on line numbers for this window. */ | |
2520 | if (position == startpos - distance) | |
2521 | { | |
2522 | w->base_line_pos = w->buffer; | |
2523 | w->base_line_number = Qnil; | |
2524 | return "??"; | |
2525 | } | |
2526 | ||
2527 | XFASTINT (w->base_line_number) = topline - nlines; | |
2528 | XFASTINT (w->base_line_pos) = position; | |
2529 | } | |
2530 | ||
2531 | /* Now count lines from the start pos to point. */ | |
2532 | nlines = display_count_lines (startpos, PT, PT, &junk); | |
2533 | ||
2534 | /* Record that we did display the line number. */ | |
2535 | line_number_displayed = 1; | |
2536 | ||
2537 | /* Make the string to show. */ | |
2538 | sprintf (decode_mode_spec_buf, "%d", topline + nlines); | |
2539 | return decode_mode_spec_buf; | |
2540 | } | |
2541 | break; | |
2542 | ||
a2889657 JB |
2543 | case 'm': |
2544 | obj = current_buffer->mode_name; | |
2545 | break; | |
2546 | ||
2547 | case 'n': | |
2548 | if (BEGV > BEG || ZV < Z) | |
2549 | return " Narrow"; | |
2550 | break; | |
2551 | ||
2552 | case '*': | |
265a9e55 | 2553 | if (!NILP (current_buffer->read_only)) |
a2889657 JB |
2554 | return "%"; |
2555 | if (MODIFF > current_buffer->save_modified) | |
2556 | return "*"; | |
2557 | return "-"; | |
2558 | ||
2559 | case 's': | |
2560 | /* status of process */ | |
a2889657 | 2561 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
265a9e55 | 2562 | if (NILP (obj)) |
a2889657 JB |
2563 | return "no process"; |
2564 | obj = Fsymbol_name (Fprocess_status (obj)); | |
2565 | break; | |
a2889657 JB |
2566 | |
2567 | case 'p': | |
2568 | { | |
2569 | int pos = marker_position (w->start); | |
2570 | int total = ZV - BEGV; | |
2571 | ||
2572 | if (XFASTINT (w->window_end_pos) <= Z - ZV) | |
2573 | { | |
2574 | if (pos <= BEGV) | |
2575 | return "All"; | |
2576 | else | |
2577 | return "Bottom"; | |
2578 | } | |
2579 | else if (pos <= BEGV) | |
2580 | return "Top"; | |
2581 | else | |
2582 | { | |
2583 | total = ((pos - BEGV) * 100 + total - 1) / total; | |
2584 | /* We can't normally display a 3-digit number, | |
2585 | so get us a 2-digit number that is close. */ | |
2586 | if (total == 100) | |
2587 | total = 99; | |
2588 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2589 | return decode_mode_spec_buf; | |
2590 | } | |
2591 | } | |
2592 | ||
2593 | case '%': | |
2594 | return "%"; | |
2595 | ||
2596 | case '[': | |
2597 | { | |
2598 | int i; | |
2599 | char *p; | |
2600 | ||
2601 | if (command_loop_level > 5) | |
2602 | return "[[[... "; | |
2603 | p = decode_mode_spec_buf; | |
2604 | for (i = 0; i < command_loop_level; i++) | |
2605 | *p++ = '['; | |
2606 | *p = 0; | |
2607 | return decode_mode_spec_buf; | |
2608 | } | |
2609 | ||
2610 | case ']': | |
2611 | { | |
2612 | int i; | |
2613 | char *p; | |
2614 | ||
2615 | if (command_loop_level > 5) | |
2616 | return " ...]]]"; | |
2617 | p = decode_mode_spec_buf; | |
2618 | for (i = 0; i < command_loop_level; i++) | |
2619 | *p++ = ']'; | |
2620 | *p = 0; | |
2621 | return decode_mode_spec_buf; | |
2622 | } | |
2623 | ||
2624 | case '-': | |
2625 | { | |
a2889657 JB |
2626 | register char *p; |
2627 | register int i; | |
2628 | ||
2629 | if (maxwidth < sizeof (lots_of_dashes)) | |
2630 | return lots_of_dashes; | |
2631 | else | |
2632 | { | |
2633 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
2634 | *p++ = '-'; | |
2635 | *p = '\0'; | |
2636 | } | |
2637 | return decode_mode_spec_buf; | |
2638 | } | |
2639 | } | |
2640 | ||
2641 | if (XTYPE (obj) == Lisp_String) | |
2642 | return (char *) XSTRING (obj)->data; | |
2643 | else | |
2644 | return ""; | |
2645 | } | |
aa6d10fa RS |
2646 | |
2647 | /* Count up to N lines starting from FROM. | |
2648 | But don't go beyond LIMIT. | |
2649 | Return the number of lines thus found (always positive). | |
2650 | Store the position after what was found into *POS_PTR. */ | |
2651 | ||
2652 | static int | |
2653 | display_count_lines (from, limit, n, pos_ptr) | |
2654 | int from, limit, n; | |
2655 | int *pos_ptr; | |
2656 | { | |
2657 | int oldbegv = BEGV; | |
2658 | int oldzv = ZV; | |
2659 | int shortage = 0; | |
2660 | ||
2661 | if (limit < from) | |
2662 | BEGV = limit; | |
2663 | else | |
2664 | ZV = limit; | |
2665 | ||
2666 | *pos_ptr = scan_buffer ('\n', from, n, &shortage); | |
2667 | ||
2668 | ZV = oldzv; | |
2669 | BEGV = oldbegv; | |
2670 | ||
2671 | if (n < 0) | |
2672 | /* When scanning backwards, scan_buffer stops *after* the last newline | |
2673 | it finds, but does count it. Compensate for that. */ | |
2674 | return - n - shortage - (*pos_ptr != limit); | |
2675 | return n - shortage; | |
2676 | } | |
a2889657 JB |
2677 | \f |
2678 | /* Display STRING on one line of window W, starting at HPOS. | |
2679 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 2680 | If VPOS == -1, display it as the current frame's title. |
a2889657 JB |
2681 | |
2682 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
2683 | ||
2684 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
2685 | MAXCOL is the last column ok to end at. Truncate here. | |
2686 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 2687 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
2688 | The right edge of W is an implicit maximum. |
2689 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
2690 | ||
2691 | Returns ending hpos */ | |
2692 | ||
2693 | static int | |
2694 | display_string (w, vpos, string, hpos, truncate, mincol, maxcol) | |
2695 | struct window *w; | |
2696 | unsigned char *string; | |
2697 | int vpos, hpos; | |
2698 | GLYPH truncate; | |
2699 | int mincol, maxcol; | |
2700 | { | |
2701 | register int c; | |
2702 | register GLYPH *p1; | |
2703 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 2704 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
2705 | register GLYPH *start; |
2706 | register GLYPH *end; | |
b1d1124b JB |
2707 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2708 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
2709 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
2710 | int window_width = XFASTINT (w->width); | |
2711 | ||
2712 | /* Use the standard display table, not the window's display table. | |
2713 | We don't want the mode line in rot13. */ | |
2714 | register struct Lisp_Vector *dp = 0; | |
2715 | ||
2716 | if (XTYPE (Vstandard_display_table) == Lisp_Vector | |
2717 | && XVECTOR (Vstandard_display_table)->size == DISP_TABLE_SIZE) | |
2718 | dp = XVECTOR (Vstandard_display_table); | |
2719 | ||
54ff581a | 2720 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
2721 | |
2722 | p1 = p1start; | |
2723 | start = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
2724 | end = start + window_width - (truncate != 0); | |
2725 | ||
b1d1124b JB |
2726 | if ((window_width + XFASTINT (w->left)) != FRAME_WIDTH (f)) |
2727 | { | |
88f22aff | 2728 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
b1d1124b JB |
2729 | { |
2730 | int i; | |
2731 | ||
88f22aff | 2732 | for (i = 0; i < VERTICAL_SCROLL_BAR_WIDTH; i++) |
b1d1124b JB |
2733 | *end-- = ' '; |
2734 | } | |
2735 | else | |
2736 | *end-- = '|'; | |
2737 | } | |
a2889657 JB |
2738 | |
2739 | if (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol) | |
2740 | end = desired_glyphs->glyphs[vpos] + maxcol; | |
2741 | if (maxcol >= 0 && mincol > maxcol) | |
2742 | mincol = maxcol; | |
2743 | ||
2744 | while (p1 < end) | |
2745 | { | |
2746 | c = *string++; | |
2747 | if (!c) break; | |
2748 | if (c >= 040 && c < 0177 | |
c581d710 | 2749 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
2750 | { |
2751 | if (p1 >= start) | |
2752 | *p1 = c; | |
2753 | p1++; | |
2754 | } | |
2755 | else if (c == '\t') | |
2756 | { | |
2757 | do | |
2758 | { | |
2759 | if (p1 >= start && p1 < end) | |
2760 | *p1 = SPACEGLYPH; | |
2761 | p1++; | |
2762 | } | |
2763 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
2764 | } | |
c581d710 | 2765 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
1c2250c2 | 2766 | p1 = copy_rope (p1, start, DISP_CHAR_VECTOR (dp, c), 0); |
ded34426 | 2767 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
2768 | { |
2769 | if (p1 >= start) | |
2770 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
2771 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
2772 | p1++; | |
6e8290aa | 2773 | if (p1 >= start && p1 < end) |
a2889657 JB |
2774 | *p1 = c ^ 0100; |
2775 | p1++; | |
2776 | } | |
2777 | else | |
2778 | { | |
2779 | if (p1 >= start) | |
2780 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
2781 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
2782 | p1++; | |
6e8290aa | 2783 | if (p1 >= start && p1 < end) |
a2889657 JB |
2784 | *p1 = (c >> 6) + '0'; |
2785 | p1++; | |
6e8290aa | 2786 | if (p1 >= start && p1 < end) |
a2889657 JB |
2787 | *p1 = (7 & (c >> 3)) + '0'; |
2788 | p1++; | |
6e8290aa | 2789 | if (p1 >= start && p1 < end) |
a2889657 JB |
2790 | *p1 = (7 & c) + '0'; |
2791 | p1++; | |
2792 | } | |
2793 | } | |
2794 | ||
2795 | if (c) | |
2796 | { | |
2797 | p1 = end; | |
2798 | if (truncate) *p1++ = truncate; | |
2799 | } | |
2800 | else if (mincol >= 0) | |
2801 | { | |
2802 | end = desired_glyphs->glyphs[vpos] + mincol; | |
2803 | while (p1 < end) | |
2804 | *p1++ = SPACEGLYPH; | |
2805 | } | |
2806 | ||
2807 | { | |
2808 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
2809 | ||
2810 | if (len > desired_glyphs->used[vpos]) | |
2811 | desired_glyphs->used[vpos] = len; | |
2812 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2813 | ||
2814 | return len; | |
2815 | } | |
2816 | } | |
2817 | \f | |
2818 | void | |
2819 | syms_of_xdisp () | |
2820 | { | |
2821 | staticpro (&last_arrow_position); | |
2822 | staticpro (&last_arrow_string); | |
2823 | last_arrow_position = Qnil; | |
2824 | last_arrow_string = Qnil; | |
2825 | ||
2826 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 2827 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
2828 | Vglobal_mode_string = Qnil; |
2829 | ||
2830 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
2831 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
2832 | This must be the beginning of a line in order to work.\n\ | |
2833 | See also `overlay-arrow-string'."); | |
2834 | Voverlay_arrow_position = Qnil; | |
2835 | ||
2836 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
2837 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
2838 | Voverlay_arrow_string = Qnil; | |
2839 | ||
2840 | DEFVAR_INT ("scroll-step", &scroll_step, | |
2841 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
2842 | If that fails to bring point back on frame, point is centered instead.\n\ |
2843 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 JB |
2844 | |
2845 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); | |
2846 | ||
2847 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
2848 | &truncate_partial_width_windows, | |
44fa5b1e | 2849 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
2850 | truncate_partial_width_windows = 1; |
2851 | ||
2852 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
2853 | "*Non-nil means use inverse video for the mode line."); | |
2854 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
2855 | |
2856 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
2857 | "*Maximum buffer size for which line number should be displayed."); | |
2858 | line_number_display_limit = 1000000; | |
fba9ce76 RS |
2859 | |
2860 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
2861 | "*Non-nil means highlight region even in nonselected windows."); | |
2862 | highlight_nonselected_windows = 1; | |
a2889657 JB |
2863 | } |
2864 | ||
2865 | /* initialize the window system */ | |
2866 | init_xdisp () | |
2867 | { | |
2868 | Lisp_Object root_window; | |
2869 | #ifndef COMPILER_REGISTER_BUG | |
2870 | register | |
2871 | #endif /* COMPILER_REGISTER_BUG */ | |
2872 | struct window *mini_w; | |
2873 | ||
2874 | this_line_bufpos = 0; | |
2875 | ||
2876 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 2877 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
2878 | |
2879 | echo_area_glyphs = 0; | |
2880 | previous_echo_glyphs = 0; | |
2881 | ||
2882 | if (!noninteractive) | |
2883 | { | |
44fa5b1e | 2884 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
a2889657 | 2885 | XFASTINT (XWINDOW (root_window)->top) = 0; |
44fa5b1e JB |
2886 | set_window_height (root_window, FRAME_HEIGHT (f) - 1, 0); |
2887 | XFASTINT (mini_w->top) = FRAME_HEIGHT (f) - 1; | |
a2889657 JB |
2888 | set_window_height (minibuf_window, 1, 0); |
2889 | ||
44fa5b1e JB |
2890 | XFASTINT (XWINDOW (root_window)->width) = FRAME_WIDTH (f); |
2891 | XFASTINT (mini_w->width) = FRAME_WIDTH (f); | |
a2889657 JB |
2892 | } |
2893 | } |