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