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 | ||
18160b98 | 21 | #include <config.h> |
a2889657 JB |
22 | #include <stdio.h> |
23 | /*#include <ctype.h>*/ | |
24 | #undef NULL | |
25 | #include "lisp.h" | |
44fa5b1e | 26 | #include "frame.h" |
a2889657 JB |
27 | #include "window.h" |
28 | #include "termchar.h" | |
29 | #include "dispextern.h" | |
30 | #include "buffer.h" | |
31 | #include "indent.h" | |
32 | #include "commands.h" | |
33 | #include "macros.h" | |
34 | #include "disptab.h" | |
30c566e4 | 35 | #include "termhooks.h" |
b0a0fbda | 36 | #include "intervals.h" |
a2889657 JB |
37 | |
38 | extern int interrupt_input; | |
39 | extern int command_loop_level; | |
40 | ||
41 | /* Nonzero means print newline before next minibuffer message. */ | |
42 | ||
43 | int noninteractive_need_newline; | |
44 | ||
45 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
46 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
47 | ||
48 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
49 | entirely or partially on the current frame line. |
50 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
51 | static int this_line_bufpos; |
52 | ||
53 | /* Number of characters past the end of this line, | |
54 | including the terminating newline */ | |
55 | static int this_line_endpos; | |
56 | ||
44fa5b1e | 57 | /* The vertical position of this frame line. */ |
a2889657 JB |
58 | static int this_line_vpos; |
59 | ||
44fa5b1e | 60 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
61 | Usually zero, but negative if first character really began |
62 | on previous line */ | |
63 | static int this_line_start_hpos; | |
64 | ||
65 | /* Buffer that this_line variables are describing. */ | |
66 | static struct buffer *this_line_buffer; | |
67 | ||
68 | /* Set by try_window_id to the vpos of first of any lines | |
44fa5b1e | 69 | scrolled on to the bottom of the frame. These lines should |
a2889657 JB |
70 | not be included in any general scroll computation. */ |
71 | static int scroll_bottom_vpos; | |
72 | ||
73 | /* Value of echo_area_glyphs when it was last acted on. | |
44fa5b1e | 74 | If this is nonzero, there is a message on the frame |
a2889657 JB |
75 | in the minibuffer and it should be erased as soon |
76 | as it is no longer requested to appear. */ | |
77 | char *previous_echo_glyphs; | |
78 | ||
44fa5b1e | 79 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
80 | int truncate_partial_width_windows; |
81 | ||
82 | Lisp_Object Vglobal_mode_string; | |
83 | ||
84 | /* Marker for where to display an arrow on top of the buffer text. */ | |
85 | Lisp_Object Voverlay_arrow_position; | |
86 | ||
87 | /* String to display for the arrow. */ | |
88 | Lisp_Object Voverlay_arrow_string; | |
89 | ||
90 | /* Values of those variables at last redisplay. */ | |
ded34426 | 91 | static Lisp_Object last_arrow_position, last_arrow_string; |
a2889657 JB |
92 | |
93 | /* Nonzero if overlay arrow has been displayed once in this window. */ | |
94 | static int overlay_arrow_seen; | |
95 | ||
fba9ce76 RS |
96 | /* Nonzero means highlight the region even in nonselected windows. */ |
97 | static int highlight_nonselected_windows; | |
98 | ||
44fa5b1e | 99 | /* If cursor motion alone moves point off frame, |
a2889657 JB |
100 | Try scrolling this many lines up or down if that will bring it back. */ |
101 | int scroll_step; | |
102 | ||
103 | /* Nonzero if try_window_id has made blank lines at window bottom | |
104 | since the last redisplay that paused */ | |
105 | static int blank_end_of_window; | |
106 | ||
107 | /* Number of windows showing the buffer of the selected window. | |
108 | keyboard.c refers to this. */ | |
109 | int buffer_shared; | |
110 | ||
44fa5b1e | 111 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
112 | whether the window is selected or not. |
113 | Set one to -1 first to determine whether point was found afterwards. */ | |
114 | ||
115 | static int cursor_vpos; | |
116 | static int cursor_hpos; | |
117 | ||
118 | int debug_end_pos; | |
119 | ||
120 | /* Nonzero means display mode line highlighted */ | |
121 | int mode_line_inverse_video; | |
122 | ||
123 | static void echo_area_display (); | |
124 | void mark_window_display_accurate (); | |
125 | static void redisplay_windows (); | |
126 | static void redisplay_window (); | |
90adcf20 RS |
127 | static void update_menu_bars (); |
128 | static void update_menu_bar (); | |
a2889657 JB |
129 | static void try_window (); |
130 | static int try_window_id (); | |
131 | static struct position *display_text_line (); | |
132 | static void display_mode_line (); | |
133 | static int display_mode_element (); | |
134 | static char *fmodetrunc (); | |
135 | static char *decode_mode_spec (); | |
136 | static int display_string (); | |
7ce2c095 | 137 | static void display_menu_bar (); |
aa6d10fa | 138 | static int display_count_lines (); |
a2889657 JB |
139 | |
140 | /* Prompt to display in front of the minibuffer contents */ | |
141 | char *minibuf_prompt; | |
142 | ||
143 | /* Width in columns of current minibuffer prompt. */ | |
144 | int minibuf_prompt_width; | |
145 | ||
146 | /* Message to display instead of minibuffer contents | |
147 | This is what the functions error and message make, | |
148 | and command echoing uses it as well. | |
149 | It overrides the minibuf_prompt as well as the buffer. */ | |
150 | char *echo_area_glyphs; | |
151 | ||
90adcf20 RS |
152 | /* This is the length of the message in echo_area_glyphs. */ |
153 | int echo_area_glyphs_length; | |
154 | ||
a2889657 JB |
155 | /* true iff we should redraw the mode lines on the next redisplay */ |
156 | int update_mode_lines; | |
157 | ||
158 | /* Smallest number of characters before the gap | |
159 | at any time since last redisplay that finished. | |
160 | Valid for current buffer when try_window_id can be called. */ | |
161 | int beg_unchanged; | |
162 | ||
163 | /* Smallest number of characters after the gap | |
164 | at any time since last redisplay that finished. | |
165 | Valid for current buffer when try_window_id can be called. */ | |
166 | int end_unchanged; | |
167 | ||
168 | /* MODIFF as of last redisplay that finished; | |
169 | if it matches MODIFF, beg_unchanged and end_unchanged | |
170 | contain no useful information */ | |
171 | int unchanged_modified; | |
172 | ||
173 | /* Nonzero if head_clip or tail_clip of current buffer has changed | |
174 | since last redisplay that finished */ | |
175 | int clip_changed; | |
176 | ||
177 | /* Nonzero if window sizes or contents have changed | |
178 | since last redisplay that finished */ | |
179 | int windows_or_buffers_changed; | |
180 | ||
aa6d10fa RS |
181 | /* Nonzero after display_mode_line if %l was used |
182 | and it displayed a line number. */ | |
183 | int line_number_displayed; | |
184 | ||
185 | /* Maximum buffer size for which to display line numbers. */ | |
186 | int line_number_display_limit; | |
a2889657 | 187 | \f |
ded34426 JB |
188 | /* Specify m, a string, as a message in the minibuf. If m is 0, clear out |
189 | any existing message, and let the minibuffer text show through. */ | |
90adcf20 | 190 | |
ded34426 JB |
191 | void |
192 | message1 (m) | |
193 | char *m; | |
194 | { | |
195 | if (noninteractive) | |
196 | { | |
197 | if (noninteractive_need_newline) | |
198 | putc ('\n', stderr); | |
199 | noninteractive_need_newline = 0; | |
c4f14ccb RS |
200 | if (cursor_in_echo_area != 0) |
201 | fprintf (stderr, "%s", m); | |
202 | else | |
203 | fprintf (stderr, "%s\n", m); | |
ded34426 JB |
204 | fflush (stderr); |
205 | } | |
206 | /* A null message buffer means that the frame hasn't really been | |
207 | initialized yet. Error messages get reported properly by | |
208 | cmd_error, so this must be just an informative message; toss it. */ | |
209 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
210 | { | |
211 | #ifdef MULTI_FRAME | |
212 | Lisp_Object minibuf_frame; | |
213 | ||
214 | choose_minibuf_frame (); | |
215 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); | |
d724d989 | 216 | FRAME_SAMPLE_VISIBILITY (XFRAME (minibuf_frame)); |
ded34426 JB |
217 | if (FRAME_VISIBLE_P (selected_frame) |
218 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
219 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
220 | #endif | |
221 | ||
222 | if (m) | |
90adcf20 RS |
223 | { |
224 | echo_area_glyphs = m; | |
225 | echo_area_glyphs_length = strlen (m); | |
226 | } | |
227 | else | |
228 | echo_area_glyphs = previous_echo_glyphs = 0; | |
229 | ||
230 | do_pending_window_change (); | |
231 | echo_area_display (); | |
232 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); | |
233 | do_pending_window_change (); | |
234 | } | |
235 | } | |
236 | ||
237 | /* Display an echo area message M with a specified length of LEN chars. | |
238 | This way, null characters can be included. */ | |
239 | ||
240 | void | |
241 | message2 (m, len) | |
242 | char *m; | |
243 | int len; | |
244 | { | |
245 | if (noninteractive) | |
246 | { | |
247 | if (noninteractive_need_newline) | |
248 | putc ('\n', stderr); | |
249 | noninteractive_need_newline = 0; | |
250 | fwrite (m, len, 1, stderr); | |
251 | if (cursor_in_echo_area == 0) | |
252 | fprintf (stderr, "\n"); | |
253 | fflush (stderr); | |
254 | } | |
255 | /* A null message buffer means that the frame hasn't really been | |
256 | initialized yet. Error messages get reported properly by | |
257 | cmd_error, so this must be just an informative message; toss it. */ | |
258 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
259 | { | |
260 | #ifdef MULTI_FRAME | |
261 | Lisp_Object minibuf_frame; | |
262 | ||
263 | choose_minibuf_frame (); | |
264 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); | |
265 | FRAME_SAMPLE_VISIBILITY (XFRAME (minibuf_frame)); | |
266 | if (FRAME_VISIBLE_P (selected_frame) | |
267 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
268 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
269 | #endif | |
270 | ||
271 | if (m) | |
272 | { | |
273 | echo_area_glyphs = m; | |
274 | echo_area_glyphs_length = len; | |
275 | } | |
ded34426 JB |
276 | else |
277 | echo_area_glyphs = previous_echo_glyphs = 0; | |
278 | ||
279 | do_pending_window_change (); | |
280 | echo_area_display (); | |
281 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); | |
282 | do_pending_window_change (); | |
283 | } | |
284 | } | |
285 | ||
44fa5b1e | 286 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
287 | zero if being used by message. */ |
288 | int message_buf_print; | |
289 | ||
81d478f3 JB |
290 | /* Dump an informative message to the minibuf. If m is 0, clear out |
291 | any existing message, and let the minibuffer text show through. */ | |
a2889657 | 292 | /* VARARGS 1 */ |
a2889657 JB |
293 | void |
294 | message (m, a1, a2, a3) | |
295 | char *m; | |
296 | { | |
297 | if (noninteractive) | |
298 | { | |
81d478f3 JB |
299 | if (m) |
300 | { | |
301 | if (noninteractive_need_newline) | |
302 | putc ('\n', stderr); | |
303 | noninteractive_need_newline = 0; | |
304 | fprintf (stderr, m, a1, a2, a3); | |
c4f14ccb RS |
305 | if (cursor_in_echo_area == 0) |
306 | fprintf (stderr, "\n"); | |
81d478f3 JB |
307 | fflush (stderr); |
308 | } | |
a2889657 | 309 | } |
1f40cad2 | 310 | else if (INTERACTIVE) |
a2889657 | 311 | { |
1f40cad2 JB |
312 | /* The frame whose minibuffer we're going to display the message on. |
313 | It may be larger than the selected frame, so we need | |
314 | to use its buffer, not the selected frame's buffer. */ | |
315 | FRAME_PTR echo_frame; | |
316 | #ifdef MULTI_FRAME | |
317 | choose_minibuf_frame (); | |
318 | echo_frame = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
319 | #else | |
320 | echo_frame = selected_frame; | |
321 | #endif | |
322 | ||
323 | /* A null message buffer means that the frame hasn't really been | |
324 | initialized yet. Error messages get reported properly by | |
325 | cmd_error, so this must be just an informative message; toss it. */ | |
326 | if (FRAME_MESSAGE_BUF (echo_frame)) | |
81d478f3 | 327 | { |
1f40cad2 JB |
328 | if (m) |
329 | { | |
90adcf20 | 330 | int len; |
a2889657 | 331 | #ifdef NO_ARG_ARRAY |
90adcf20 RS |
332 | int a[3]; |
333 | a[0] = a1; | |
334 | a[1] = a2; | |
335 | a[2] = a3; | |
a2889657 | 336 | |
90adcf20 RS |
337 | len = doprnt (FRAME_MESSAGE_BUF (echo_frame), |
338 | FRAME_WIDTH (echo_frame), m, 0, 3, a); | |
a2889657 | 339 | #else |
90adcf20 RS |
340 | len = doprnt (FRAME_MESSAGE_BUF (echo_frame), |
341 | FRAME_WIDTH (echo_frame), m, 0, 3, &a1); | |
1f40cad2 | 342 | #endif /* NO_ARG_ARRAY */ |
1f40cad2 | 343 | |
90adcf20 | 344 | message2 (FRAME_MESSAGE_BUF (echo_frame), len); |
1f40cad2 JB |
345 | } |
346 | else | |
347 | message1 (0); | |
348 | ||
349 | /* Print should start at the beginning of the message | |
350 | buffer next time. */ | |
351 | message_buf_print = 0; | |
81d478f3 | 352 | } |
a2889657 JB |
353 | } |
354 | } | |
355 | ||
356 | static void | |
357 | echo_area_display () | |
358 | { | |
359 | register int vpos; | |
44fa5b1e | 360 | FRAME_PTR f; |
a2889657 | 361 | |
44fa5b1e JB |
362 | #ifdef MULTI_FRAME |
363 | choose_minibuf_frame (); | |
b1d1124b JB |
364 | #endif |
365 | ||
44fa5b1e | 366 | f = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); |
a2889657 | 367 | |
44fa5b1e | 368 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 369 | return; |
a2889657 | 370 | |
44fa5b1e | 371 | if (frame_garbaged) |
a2889657 | 372 | { |
02a9b6e4 | 373 | redraw_garbaged_frames (); |
44fa5b1e | 374 | frame_garbaged = 0; |
a2889657 JB |
375 | } |
376 | ||
377 | if (echo_area_glyphs || minibuf_level == 0) | |
378 | { | |
379 | vpos = XFASTINT (XWINDOW (minibuf_window)->top); | |
44fa5b1e | 380 | get_display_line (f, vpos, 0); |
a2889657 JB |
381 | display_string (XWINDOW (minibuf_window), vpos, |
382 | echo_area_glyphs ? echo_area_glyphs : "", | |
90adcf20 | 383 | echo_area_glyphs ? echo_area_glyphs_length : -1, |
44fa5b1e | 384 | 0, 0, 0, FRAME_WIDTH (f)); |
a2889657 JB |
385 | |
386 | /* If desired cursor location is on this line, put it at end of text */ | |
44fa5b1e JB |
387 | if (FRAME_CURSOR_Y (f) == vpos) |
388 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
daa37602 JB |
389 | |
390 | /* Fill the rest of the minibuffer window with blank lines. */ | |
391 | { | |
392 | int i; | |
393 | ||
b2a76982 RS |
394 | for (i = vpos + 1; |
395 | i < vpos + XFASTINT (XWINDOW (minibuf_window)->height); i++) | |
daa37602 | 396 | { |
44fa5b1e | 397 | get_display_line (f, i, 0); |
daa37602 | 398 | display_string (XWINDOW (minibuf_window), vpos, |
90adcf20 | 399 | "", 0, 0, 0, 0, FRAME_WIDTH (f)); |
daa37602 JB |
400 | } |
401 | } | |
a2889657 JB |
402 | } |
403 | else if (!EQ (minibuf_window, selected_window)) | |
404 | windows_or_buffers_changed++; | |
405 | ||
406 | if (EQ (minibuf_window, selected_window)) | |
407 | this_line_bufpos = 0; | |
408 | ||
409 | previous_echo_glyphs = echo_area_glyphs; | |
410 | } | |
411 | \f | |
90adcf20 RS |
412 | /* Prepare for redisplay by updating menu-bar item lists when appropriate. |
413 | This can't be done in `redisplay' itself because it can call eval. */ | |
414 | ||
415 | void | |
416 | prepare_menu_bars () | |
417 | { | |
418 | register struct window *w = XWINDOW (selected_window); | |
419 | int all_windows; | |
420 | ||
421 | if (noninteractive) | |
422 | return; | |
423 | ||
424 | /* Set the visible flags for all frames. | |
425 | Do this before checking for resized or garbaged frames; they want | |
426 | to know if their frames are visible. | |
427 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
428 | { | |
429 | Lisp_Object tail, frame; | |
430 | ||
431 | FOR_EACH_FRAME (tail, frame) | |
432 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
433 | } | |
434 | ||
435 | /* Notice any pending interrupt request to change frame size. */ | |
436 | do_pending_window_change (); | |
437 | ||
438 | if (frame_garbaged) | |
439 | { | |
440 | redraw_garbaged_frames (); | |
441 | frame_garbaged = 0; | |
442 | } | |
443 | ||
444 | if (clip_changed || windows_or_buffers_changed) | |
445 | update_mode_lines++; | |
446 | ||
447 | /* Detect case that we need to write a star in the mode line. */ | |
448 | if (XFASTINT (w->last_modified) < MODIFF | |
449 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
450 | { | |
451 | w->update_mode_line = Qt; | |
452 | if (buffer_shared > 1) | |
453 | update_mode_lines++; | |
454 | } | |
455 | ||
456 | all_windows = update_mode_lines || buffer_shared > 1; | |
457 | ||
458 | /* If specs for an arrow have changed, do thorough redisplay | |
459 | to ensure we remove any arrow that should no longer exist. */ | |
460 | if (! EQ (Voverlay_arrow_position, last_arrow_position) | |
461 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
462 | all_windows = 1, clip_changed = 1; | |
463 | ||
464 | /* Update the menu bar item lists, if appropriate. | |
465 | This has to be done before any actual redisplay | |
466 | or generation of display lines. */ | |
467 | if (all_windows) | |
468 | { | |
469 | Lisp_Object tail, frame; | |
470 | ||
471 | FOR_EACH_FRAME (tail, frame) | |
472 | { | |
473 | FRAME_PTR f = XFRAME (frame); | |
474 | ||
475 | if (FRAME_VISIBLE_P (f)) | |
476 | update_menu_bars (FRAME_ROOT_WINDOW (f)); | |
477 | } | |
478 | } | |
479 | else if (FRAME_VISIBLE_P (selected_frame)) | |
480 | update_menu_bar (selected_window); | |
481 | } | |
482 | \f | |
44fa5b1e | 483 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
484 | This is the main external entry point for redisplay. |
485 | ||
486 | If the last redisplay displayed an echo area message and that | |
487 | message is no longer requested, we clear the echo area | |
488 | or bring back the minibuffer if that is in use. | |
489 | ||
90adcf20 RS |
490 | Do not call eval from within this function. |
491 | Calls to eval after the call to echo_area_display would confuse | |
492 | the display_line mechanism and would cause a crash. | |
493 | Calls to eval before that point will work most of the time, | |
494 | but can still lose, because this function | |
495 | can be called from signal handlers; with alarms set up; | |
a2889657 | 496 | or with synchronous processes running. |
90adcf20 | 497 | |
a2889657 JB |
498 | See Fcall_process; if you called it from here, it could be |
499 | entered recursively. */ | |
500 | ||
501 | void | |
502 | redisplay () | |
503 | { | |
504 | register struct window *w = XWINDOW (selected_window); | |
505 | register int pause; | |
506 | int must_finish = 0; | |
507 | int all_windows; | |
508 | register int tlbufpos, tlendpos; | |
509 | struct position pos; | |
510 | extern int input_pending; | |
511 | ||
512 | if (noninteractive) | |
513 | return; | |
514 | ||
d724d989 JB |
515 | /* Set the visible flags for all frames. |
516 | Do this before checking for resized or garbaged frames; they want | |
517 | to know if their frames are visible. | |
518 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
519 | { | |
35f56f96 | 520 | Lisp_Object tail, frame; |
d724d989 | 521 | |
35f56f96 JB |
522 | FOR_EACH_FRAME (tail, frame) |
523 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
d724d989 JB |
524 | } |
525 | ||
44fa5b1e | 526 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
527 | do_pending_window_change (); |
528 | ||
44fa5b1e | 529 | if (frame_garbaged) |
a2889657 | 530 | { |
02a9b6e4 | 531 | redraw_garbaged_frames (); |
44fa5b1e | 532 | frame_garbaged = 0; |
a2889657 JB |
533 | } |
534 | ||
a2889657 JB |
535 | if (clip_changed || windows_or_buffers_changed) |
536 | update_mode_lines++; | |
537 | ||
538 | /* Detect case that we need to write a star in the mode line. */ | |
539 | if (XFASTINT (w->last_modified) < MODIFF | |
540 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
541 | { | |
542 | w->update_mode_line = Qt; | |
543 | if (buffer_shared > 1) | |
544 | update_mode_lines++; | |
545 | } | |
546 | ||
44fa5b1e | 547 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
548 | |
549 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
550 | |
551 | /* If specs for an arrow have changed, do thorough redisplay | |
552 | to ensure we remove any arrow that should no longer exist. */ | |
ded34426 JB |
553 | if (! EQ (Voverlay_arrow_position, last_arrow_position) |
554 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
a2889657 JB |
555 | all_windows = 1, clip_changed = 1; |
556 | ||
90adcf20 RS |
557 | /* Normally the message* functions will have already displayed and |
558 | updated the echo area, but the frame may have been trashed, or | |
559 | the update may have been preempted, so display the echo area | |
560 | again here. */ | |
561 | if (echo_area_glyphs || previous_echo_glyphs) | |
562 | { | |
563 | echo_area_display (); | |
564 | must_finish = 1; | |
565 | } | |
566 | ||
bd66d1ba RS |
567 | /* If showing region, and mark has changed, must redisplay whole window. */ |
568 | if (((!NILP (Vtransient_mark_mode) | |
569 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
570 | != !NILP (w->region_showing)) | |
82d04750 JB |
571 | || (!NILP (w->region_showing) |
572 | && !EQ (w->region_showing, | |
573 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
bd66d1ba RS |
574 | this_line_bufpos = -1; |
575 | ||
a2889657 JB |
576 | tlbufpos = this_line_bufpos; |
577 | tlendpos = this_line_endpos; | |
265a9e55 | 578 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
44fa5b1e | 579 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
a2889657 JB |
580 | /* Make sure recorded data applies to current buffer, etc */ |
581 | && this_line_buffer == current_buffer | |
582 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 583 | && NILP (w->force_start) |
a2889657 JB |
584 | /* Point must be on the line that we have info recorded about */ |
585 | && point >= tlbufpos | |
586 | && point <= Z - tlendpos | |
587 | /* All text outside that line, including its final newline, | |
588 | must be unchanged */ | |
589 | && (XFASTINT (w->last_modified) >= MODIFF | |
590 | || (beg_unchanged >= tlbufpos - 1 | |
591 | && GPT >= tlbufpos | |
05ba02eb JB |
592 | /* If selective display, can't optimize |
593 | if the changes start at the beginning of the line. */ | |
594 | && ((XTYPE (current_buffer->selective_display) == Lisp_Int | |
595 | && XINT (current_buffer->selective_display) > 0 | |
596 | ? (beg_unchanged >= tlbufpos | |
597 | && GPT > tlbufpos) | |
598 | : 1)) | |
a2889657 JB |
599 | && end_unchanged >= tlendpos |
600 | && Z - GPT >= tlendpos))) | |
601 | { | |
602 | if (tlbufpos > BEGV && FETCH_CHAR (tlbufpos - 1) != '\n' | |
603 | && (tlbufpos == ZV | |
604 | || FETCH_CHAR (tlbufpos) == '\n')) | |
605 | /* Former continuation line has disappeared by becoming empty */ | |
606 | goto cancel; | |
607 | else if (XFASTINT (w->last_modified) < MODIFF | |
608 | || MINI_WINDOW_P (w)) | |
609 | { | |
610 | cursor_vpos = -1; | |
611 | overlay_arrow_seen = 0; | |
612 | display_text_line (w, tlbufpos, this_line_vpos, this_line_start_hpos, | |
613 | pos_tab_offset (w, tlbufpos)); | |
614 | /* If line contains point, is not continued, | |
615 | and ends at same distance from eob as before, we win */ | |
616 | if (cursor_vpos >= 0 && this_line_bufpos | |
617 | && this_line_endpos == tlendpos) | |
618 | { | |
44fa5b1e | 619 | if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
620 | preserve_other_columns (w); |
621 | goto update; | |
622 | } | |
623 | else | |
624 | goto cancel; | |
625 | } | |
626 | else if (point == XFASTINT (w->last_point)) | |
627 | { | |
628 | if (!must_finish) | |
629 | { | |
630 | do_pending_window_change (); | |
631 | return; | |
632 | } | |
633 | goto update; | |
634 | } | |
bd66d1ba RS |
635 | /* If highlighting the region, we can't just move the cursor. */ |
636 | else if (! (!NILP (Vtransient_mark_mode) | |
637 | && !NILP (current_buffer->mark_active)) | |
638 | && NILP (w->region_showing)) | |
a2889657 JB |
639 | { |
640 | pos = *compute_motion (tlbufpos, 0, | |
641 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
642 | point, 2, - (1 << (SHORTBITS - 1)), | |
b1d1124b | 643 | window_internal_width (w) - 1, |
de3e8b15 JB |
644 | XINT (w->hscroll), |
645 | pos_tab_offset (w, tlbufpos)); | |
a2889657 JB |
646 | if (pos.vpos < 1) |
647 | { | |
44fa5b1e | 648 | FRAME_CURSOR_X (selected_frame) |
a2889657 | 649 | = XFASTINT (w->left) + max (pos.hpos, 0); |
44fa5b1e | 650 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
651 | goto update; |
652 | } | |
653 | else | |
654 | goto cancel; | |
655 | } | |
656 | cancel: | |
657 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 658 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
659 | } |
660 | ||
661 | this_line_bufpos = 0; | |
662 | all_windows |= buffer_shared > 1; | |
663 | ||
664 | if (all_windows) | |
665 | { | |
35f56f96 | 666 | Lisp_Object tail, frame; |
a2889657 | 667 | |
31b24551 JB |
668 | #ifdef HAVE_X_WINDOWS |
669 | /* Since we're doing a thorough redisplay, we might as well | |
670 | recompute all our display faces. */ | |
671 | clear_face_vector (); | |
672 | #endif | |
673 | ||
a2889657 | 674 | /* Recompute # windows showing selected buffer. |
8de2d90b | 675 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
676 | buffer_shared = 0; |
677 | ||
35f56f96 | 678 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 679 | { |
35f56f96 JB |
680 | FRAME_PTR f = XFRAME (frame); |
681 | ||
88f22aff | 682 | /* Mark all the scroll bars to be removed; we'll redeem the ones |
30c566e4 | 683 | we want when we redisplay their windows. */ |
88f22aff JB |
684 | if (condemn_scroll_bars_hook) |
685 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 JB |
686 | |
687 | if (FRAME_VISIBLE_P (f)) | |
688 | redisplay_windows (FRAME_ROOT_WINDOW (f)); | |
689 | ||
88f22aff | 690 | /* Any scroll bars which redisplay_windows should have nuked |
30c566e4 | 691 | should now go away. */ |
88f22aff JB |
692 | if (judge_scroll_bars_hook) |
693 | (*judge_scroll_bars_hook) (f); | |
30c566e4 | 694 | } |
a2889657 | 695 | } |
44fa5b1e | 696 | else if (FRAME_VISIBLE_P (selected_frame)) |
a2889657 JB |
697 | { |
698 | redisplay_window (selected_window, 1); | |
44fa5b1e | 699 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
700 | preserve_other_columns (w); |
701 | } | |
702 | ||
703 | update: | |
704 | /* Prevent various kinds of signals during display update. | |
705 | stdio is not robust about handling signals, | |
706 | which can cause an apparent I/O error. */ | |
707 | if (interrupt_input) | |
708 | unrequest_sigio (); | |
709 | stop_polling (); | |
710 | ||
44fa5b1e | 711 | #ifdef MULTI_FRAME |
a2889657 JB |
712 | if (all_windows) |
713 | { | |
714 | Lisp_Object tail; | |
715 | ||
716 | pause = 0; | |
717 | ||
44fa5b1e | 718 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 719 | { |
44fa5b1e | 720 | FRAME_PTR f; |
a2889657 | 721 | |
44fa5b1e | 722 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
723 | continue; |
724 | ||
44fa5b1e | 725 | f = XFRAME (XCONS (tail)->car); |
30c566e4 | 726 | if (FRAME_VISIBLE_P (f)) |
a2889657 | 727 | { |
44fa5b1e | 728 | pause |= update_frame (f, 0, 0); |
a2889657 | 729 | if (!pause) |
44fa5b1e | 730 | mark_window_display_accurate (f->root_window, 1); |
a2889657 JB |
731 | } |
732 | } | |
733 | } | |
734 | else | |
44fa5b1e | 735 | #endif /* MULTI_FRAME */ |
6e8290aa | 736 | { |
44fa5b1e JB |
737 | if (FRAME_VISIBLE_P (selected_frame)) |
738 | pause = update_frame (selected_frame, 0, 0); | |
d724d989 | 739 | |
8de2d90b | 740 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
741 | function. If the echo area is on another frame, that may |
742 | have put text on a frame other than the selected one, so the | |
743 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
744 | it here. */ |
745 | { | |
44fa5b1e JB |
746 | FRAME_PTR mini_frame = |
747 | XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b | 748 | |
44fa5b1e JB |
749 | if (mini_frame != selected_frame) |
750 | pause |= update_frame (mini_frame, 0, 0); | |
8de2d90b | 751 | } |
6e8290aa | 752 | } |
a2889657 | 753 | |
44fa5b1e | 754 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
755 | Also, don't forget to check every line to update the arrow. */ |
756 | if (pause) | |
757 | { | |
758 | this_line_bufpos = 0; | |
265a9e55 | 759 | if (!NILP (last_arrow_position)) |
a2889657 JB |
760 | { |
761 | last_arrow_position = Qt; | |
762 | last_arrow_string = Qt; | |
763 | } | |
44fa5b1e | 764 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
765 | may be null, so preserve_other_columns won't be able to |
766 | preserve all the vertical-bar separators. So, avoid using it | |
767 | in that case. */ | |
44fa5b1e | 768 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
769 | update_mode_lines = 1; |
770 | } | |
771 | ||
44fa5b1e | 772 | /* Now text on frame agrees with windows, so |
a2889657 JB |
773 | put info into the windows for partial redisplay to follow */ |
774 | ||
775 | if (!pause) | |
776 | { | |
777 | register struct buffer *b = XBUFFER (w->buffer); | |
778 | ||
779 | blank_end_of_window = 0; | |
780 | clip_changed = 0; | |
781 | unchanged_modified = BUF_MODIFF (b); | |
782 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); | |
783 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
784 | ||
785 | XFASTINT (w->last_point) = BUF_PT (b); | |
44fa5b1e JB |
786 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (selected_frame); |
787 | XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame); | |
a2889657 JB |
788 | |
789 | if (all_windows) | |
11e82b76 | 790 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
791 | else |
792 | { | |
793 | w->update_mode_line = Qnil; | |
794 | XFASTINT (w->last_modified) = BUF_MODIFF (b); | |
795 | w->window_end_valid = Qt; | |
796 | last_arrow_position = Voverlay_arrow_position; | |
797 | last_arrow_string = Voverlay_arrow_string; | |
798 | } | |
799 | update_mode_lines = 0; | |
800 | windows_or_buffers_changed = 0; | |
801 | } | |
802 | ||
803 | /* Start SIGIO interrupts coming again. | |
804 | Having them off during the code above | |
805 | makes it less likely one will discard output, | |
806 | but not impossible, since there might be stuff | |
807 | in the system buffer here. | |
808 | But it is much hairier to try to do anything about that. */ | |
809 | ||
810 | if (interrupt_input) | |
811 | request_sigio (); | |
812 | start_polling (); | |
813 | ||
44fa5b1e | 814 | /* Change frame size now if a change is pending. */ |
a2889657 JB |
815 | do_pending_window_change (); |
816 | } | |
817 | ||
818 | /* Redisplay, but leave alone any recent echo area message | |
819 | unless another message has been requested in its place. | |
820 | ||
821 | This is useful in situations where you need to redisplay but no | |
822 | user action has occurred, making it inappropriate for the message | |
823 | area to be cleared. See tracking_off and | |
824 | wait_reading_process_input for examples of these situations. */ | |
825 | ||
826 | redisplay_preserve_echo_area () | |
827 | { | |
828 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
829 | { | |
830 | echo_area_glyphs = previous_echo_glyphs; | |
831 | redisplay (); | |
832 | echo_area_glyphs = 0; | |
833 | } | |
834 | else | |
835 | redisplay (); | |
836 | } | |
837 | ||
838 | void | |
839 | mark_window_display_accurate (window, flag) | |
840 | Lisp_Object window; | |
841 | int flag; | |
842 | { | |
843 | register struct window *w; | |
844 | ||
265a9e55 | 845 | for (;!NILP (window); window = w->next) |
a2889657 | 846 | { |
ded34426 | 847 | if (XTYPE (window) != Lisp_Window) abort (); |
a2889657 JB |
848 | w = XWINDOW (window); |
849 | ||
265a9e55 | 850 | if (!NILP (w->buffer)) |
bd66d1ba RS |
851 | { |
852 | XFASTINT (w->last_modified) | |
853 | = !flag ? 0 | |
854 | : XBUFFER (w->buffer) == current_buffer | |
855 | ? MODIFF : BUF_MODIFF (XBUFFER (w->buffer)); | |
856 | ||
857 | /* Record if we are showing a region, so can make sure to | |
858 | update it fully at next redisplay. */ | |
859 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
860 | && !NILP (XBUFFER (w->buffer)->mark_active) | |
861 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
862 | : Qnil); | |
863 | } | |
864 | ||
a2889657 JB |
865 | w->window_end_valid = Qt; |
866 | w->update_mode_line = Qnil; | |
867 | ||
265a9e55 | 868 | if (!NILP (w->vchild)) |
a2889657 | 869 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 870 | if (!NILP (w->hchild)) |
a2889657 JB |
871 | mark_window_display_accurate (w->hchild, flag); |
872 | } | |
873 | ||
874 | if (flag) | |
875 | { | |
876 | last_arrow_position = Voverlay_arrow_position; | |
877 | last_arrow_string = Voverlay_arrow_string; | |
878 | } | |
879 | else | |
880 | { | |
881 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
882 | last_arrow_position = Qt; | |
883 | last_arrow_string = Qt; | |
884 | } | |
885 | } | |
886 | \f | |
90adcf20 RS |
887 | /* Update the menu bar item lists for WINDOW |
888 | and its subwindows and siblings. | |
889 | This has to be done before we start to fill in any display lines, | |
890 | because it can call eval. */ | |
891 | ||
892 | static void | |
893 | update_menu_bars (window) | |
894 | Lisp_Object window; | |
895 | { | |
896 | for (; !NILP (window); window = XWINDOW (window)->next) | |
897 | update_menu_bar (window, 0); | |
898 | } | |
899 | ||
900 | /* Update the menu bar item list for window WINDOW and its subwindows. */ | |
901 | ||
902 | static void | |
903 | update_menu_bar (window, just_this_one) | |
904 | Lisp_Object window; | |
905 | int just_this_one; | |
906 | { | |
907 | register struct window *w = XWINDOW (window); | |
908 | struct buffer *old = current_buffer; | |
909 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
910 | ||
911 | /* If this is a combination window, do its children; that's all. */ | |
912 | ||
913 | if (!NILP (w->vchild)) | |
914 | { | |
915 | update_menu_bars (w->vchild); | |
916 | return; | |
917 | } | |
918 | if (!NILP (w->hchild)) | |
919 | { | |
920 | update_menu_bars (w->hchild); | |
921 | return; | |
922 | } | |
923 | if (NILP (w->buffer)) | |
924 | abort (); | |
925 | ||
926 | if (update_mode_lines) | |
927 | w->update_mode_line = Qt; | |
928 | ||
929 | /* When we reach a frame's selected window, redo the frame's menu bar. */ | |
930 | if (!NILP (w->update_mode_line) | |
931 | && FRAME_MENU_BAR_LINES (f) > 0 | |
932 | && EQ (FRAME_SELECTED_WINDOW (f), window)) | |
933 | { | |
934 | /* If the user has switched buffers or windows, we need to | |
935 | recompute to reflect the new bindings. But we'll | |
936 | recompute when update_mode_lines is set too; that means | |
937 | that people can use force-mode-line-update to request | |
938 | that the menu bar be recomputed. The adverse effect on | |
939 | the rest of the redisplay algorithm is about the same as | |
940 | windows_or_buffers_changed anyway. */ | |
941 | if (windows_or_buffers_changed | |
942 | || update_mode_lines | |
943 | || (XFASTINT (w->last_modified) < MODIFF | |
944 | && (XFASTINT (w->last_modified) | |
945 | <= XBUFFER (w->buffer)->save_modified))) | |
946 | { | |
947 | struct buffer *prev = current_buffer; | |
948 | current_buffer = XBUFFER (w->buffer); | |
949 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (); | |
950 | current_buffer = prev; | |
951 | } | |
952 | } | |
953 | } | |
954 | \f | |
a2889657 JB |
955 | int do_id = 1; |
956 | ||
90adcf20 RS |
957 | /* Redisplay WINDOW and its subwindows and siblings. */ |
958 | ||
a2889657 JB |
959 | static void |
960 | redisplay_windows (window) | |
961 | Lisp_Object window; | |
962 | { | |
265a9e55 | 963 | for (; !NILP (window); window = XWINDOW (window)->next) |
a2889657 JB |
964 | redisplay_window (window, 0); |
965 | } | |
966 | ||
90adcf20 RS |
967 | /* Redisplay window WINDOW and its subwindows. */ |
968 | ||
a2889657 JB |
969 | static void |
970 | redisplay_window (window, just_this_one) | |
971 | Lisp_Object window; | |
972 | int just_this_one; | |
973 | { | |
974 | register struct window *w = XWINDOW (window); | |
30c566e4 | 975 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 JB |
976 | int height; |
977 | register int lpoint = point; | |
978 | struct buffer *old = current_buffer; | |
b1d1124b | 979 | register int width = window_internal_width (w) - 1; |
a2889657 JB |
980 | register int startp; |
981 | register int hscroll = XINT (w->hscroll); | |
982 | struct position pos; | |
b1d1124b | 983 | int opoint = point; |
a2889657 JB |
984 | int tem; |
985 | int window_needs_modeline; | |
986 | ||
44fa5b1e | 987 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
988 | |
989 | /* If this is a combination window, do its children; that's all. */ | |
990 | ||
265a9e55 | 991 | if (!NILP (w->vchild)) |
a2889657 JB |
992 | { |
993 | redisplay_windows (w->vchild); | |
994 | return; | |
995 | } | |
265a9e55 | 996 | if (!NILP (w->hchild)) |
a2889657 JB |
997 | { |
998 | redisplay_windows (w->hchild); | |
999 | return; | |
1000 | } | |
265a9e55 | 1001 | if (NILP (w->buffer)) |
a2889657 | 1002 | abort (); |
8de2d90b JB |
1003 | |
1004 | height = window_internal_height (w); | |
1005 | ||
1006 | if (MINI_WINDOW_P (w)) | |
1007 | { | |
1008 | if (w == XWINDOW (minibuf_window)) | |
1009 | { | |
1010 | if (echo_area_glyphs) | |
1011 | /* We've already displayed the echo area glyphs, if any. */ | |
88f22aff | 1012 | goto finish_scroll_bars; |
8de2d90b JB |
1013 | } |
1014 | else | |
1015 | { | |
1016 | /* This is a minibuffer, but it's not the currently active one, so | |
1017 | clear it. */ | |
44fa5b1e | 1018 | int vpos = XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
8de2d90b JB |
1019 | int i; |
1020 | ||
1021 | for (i = 0; i < height; i++) | |
1022 | { | |
44fa5b1e | 1023 | get_display_line (f, vpos + i, 0); |
90adcf20 | 1024 | display_string (w, vpos + i, "", 0, 0, 0, 0, width); |
8de2d90b JB |
1025 | } |
1026 | ||
88f22aff | 1027 | goto finish_scroll_bars; |
8de2d90b JB |
1028 | } |
1029 | } | |
a2889657 JB |
1030 | |
1031 | if (update_mode_lines) | |
1032 | w->update_mode_line = Qt; | |
1033 | ||
1034 | /* Otherwise set up data on this window; select its buffer and point value */ | |
1035 | ||
a2889657 JB |
1036 | current_buffer = XBUFFER (w->buffer); |
1037 | opoint = point; | |
1038 | ||
1039 | /* Count number of windows showing the selected buffer. */ | |
1040 | ||
1041 | if (!just_this_one | |
1042 | && current_buffer == XBUFFER (XWINDOW (selected_window)->buffer)) | |
1043 | buffer_shared++; | |
1044 | ||
1045 | /* POINT refers normally to the selected window. | |
1046 | For any other window, set up appropriate value. */ | |
1047 | ||
1048 | if (!EQ (window, selected_window)) | |
1049 | { | |
1050 | SET_PT (marker_position (w->pointm)); | |
1051 | if (point < BEGV) | |
1052 | { | |
265a9e55 | 1053 | SET_PT (BEGV); |
a2889657 JB |
1054 | Fset_marker (w->pointm, make_number (point), Qnil); |
1055 | } | |
1056 | else if (point > (ZV - 1)) | |
1057 | { | |
265a9e55 | 1058 | SET_PT (ZV); |
a2889657 JB |
1059 | Fset_marker (w->pointm, make_number (point), Qnil); |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* If window-start is screwed up, choose a new one. */ | |
a2889657 JB |
1064 | if (XMARKER (w->start)->buffer != current_buffer) |
1065 | goto recenter; | |
1066 | ||
1067 | startp = marker_position (w->start); | |
1068 | ||
8de2d90b | 1069 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 1070 | unless the specified location is outside the accessible range. */ |
265a9e55 | 1071 | if (!NILP (w->force_start)) |
a2889657 | 1072 | { |
aa6d10fa RS |
1073 | /* Forget any recorded base line for line number display. */ |
1074 | w->base_line_number = Qnil; | |
a2889657 JB |
1075 | w->update_mode_line = Qt; |
1076 | w->force_start = Qnil; | |
1077 | XFASTINT (w->last_modified) = 0; | |
8de2d90b JB |
1078 | if (startp < BEGV) startp = BEGV; |
1079 | if (startp > ZV) startp = ZV; | |
a2889657 JB |
1080 | try_window (window, startp); |
1081 | if (cursor_vpos < 0) | |
1082 | { | |
bd66d1ba | 1083 | /* ??? What should happen here if highlighting a region? */ |
a2889657 JB |
1084 | /* If point does not appear, move point so it does appear */ |
1085 | pos = *compute_motion (startp, 0, | |
1086 | ((EQ (window, minibuf_window) && startp == 1) | |
1087 | ? minibuf_prompt_width : 0) | |
1088 | + | |
1089 | (hscroll ? 1 - hscroll : 0), | |
1090 | ZV, height / 2, | |
1091 | - (1 << (SHORTBITS - 1)), | |
1092 | width, hscroll, pos_tab_offset (w, startp)); | |
1093 | SET_PT (pos.bufpos); | |
90adcf20 | 1094 | if (w != XWINDOW (selected_window)) |
a2889657 JB |
1095 | Fset_marker (w->pointm, make_number (point), Qnil); |
1096 | else | |
1097 | { | |
9d6a6bb9 RS |
1098 | if (current_buffer == old) |
1099 | lpoint = point; | |
44fa5b1e JB |
1100 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
1101 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
1102 | } |
1103 | } | |
1104 | goto done; | |
1105 | } | |
1106 | ||
1107 | /* Handle case where text has not changed, only point, | |
44fa5b1e | 1108 | and it has not moved off the frame */ |
a2889657 JB |
1109 | |
1110 | /* This code is not used for minibuffer for the sake of | |
1111 | the case of redisplaying to replace an echo area message; | |
1112 | since in that case the minibuffer contents per se are usually unchanged. | |
1113 | This code is of no real use in the minibuffer since | |
1114 | the handling of this_line_bufpos, etc., | |
1115 | in redisplay handles the same cases. */ | |
1116 | ||
1117 | if (XFASTINT (w->last_modified) >= MODIFF | |
1118 | && point >= startp && !clip_changed | |
44fa5b1e | 1119 | && (just_this_one || XFASTINT (w->width) == FRAME_WIDTH (f)) |
bd66d1ba RS |
1120 | /* Can't use this case if highlighting a region. */ |
1121 | && !(!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1122 | && NILP (w->region_showing) | |
a2889657 JB |
1123 | && !EQ (window, minibuf_window)) |
1124 | { | |
1125 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), | |
1126 | point, height + 1, 10000, width, hscroll, | |
1127 | pos_tab_offset (w, startp)); | |
1128 | ||
1129 | if (pos.vpos < height) | |
1130 | { | |
44fa5b1e JB |
1131 | /* Ok, point is still on frame */ |
1132 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
1133 | { |
1134 | /* These variables are supposed to be origin 1 */ | |
44fa5b1e JB |
1135 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
1136 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
1137 | } |
1138 | /* This doesn't do the trick, because if a window to the right of | |
1139 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 1140 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 1141 | redisplayed, making likes that are empty in this window's columns. |
44fa5b1e | 1142 | if (XFASTINT (w->width) != FRAME_WIDTH (f)) |
a2889657 JB |
1143 | preserve_my_columns (w); |
1144 | */ | |
1145 | goto done; | |
1146 | } | |
1147 | /* Don't bother trying redisplay with same start; | |
1148 | we already know it will lose */ | |
1149 | } | |
1150 | /* If current starting point was originally the beginning of a line | |
1151 | but no longer is, find a new starting point. */ | |
265a9e55 | 1152 | else if (!NILP (w->start_at_line_beg) |
a2889657 JB |
1153 | && !(startp == BEGV |
1154 | || FETCH_CHAR (startp - 1) == '\n')) | |
1155 | { | |
1156 | goto recenter; | |
1157 | } | |
1158 | else if (just_this_one && !MINI_WINDOW_P (w) | |
1159 | && point >= startp | |
1160 | && XFASTINT (w->last_modified) | |
14709f21 JB |
1161 | /* or else vmotion on first line won't work. */ |
1162 | && ! NILP (w->start_at_line_beg) | |
a2889657 JB |
1163 | && ! EQ (w->window_end_valid, Qnil) |
1164 | && do_id && !clip_changed | |
1165 | && !blank_end_of_window | |
44fa5b1e | 1166 | && XFASTINT (w->width) == FRAME_WIDTH (f) |
bd66d1ba RS |
1167 | /* Can't use this case if highlighting a region. */ |
1168 | && !(!NILP (Vtransient_mark_mode) | |
1169 | && !NILP (current_buffer->mark_active)) | |
1170 | && NILP (w->region_showing) | |
a2889657 JB |
1171 | && EQ (last_arrow_position, Voverlay_arrow_position) |
1172 | && EQ (last_arrow_string, Voverlay_arrow_string) | |
44fa5b1e | 1173 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
1174 | && tem != -2) |
1175 | { | |
1176 | /* tem > 0 means success. tem == -1 means choose new start. | |
1177 | tem == -2 means try again with same start, | |
1178 | and nothing but whitespace follows the changed stuff. | |
1179 | tem == 0 means try again with same start. */ | |
1180 | if (tem > 0) | |
1181 | goto done; | |
1182 | } | |
1183 | else if (startp >= BEGV && startp <= ZV | |
1184 | /* Avoid starting display at end of buffer! */ | |
8de2d90b | 1185 | && (startp < ZV || startp == BEGV |
a2889657 JB |
1186 | || (XFASTINT (w->last_modified) >= MODIFF))) |
1187 | { | |
1188 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 1189 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
1190 | try_window (window, startp); |
1191 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
1192 | { |
1193 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
1194 | /* Forget any recorded base line for line number display. */ | |
1195 | w->base_line_number = Qnil; | |
1196 | goto done; | |
1197 | } | |
a2889657 JB |
1198 | else |
1199 | cancel_my_columns (w); | |
1200 | } | |
1201 | ||
1202 | XFASTINT (w->last_modified) = 0; | |
1203 | w->update_mode_line = Qt; | |
1204 | ||
1205 | /* Try to scroll by specified few lines */ | |
1206 | ||
1207 | if (scroll_step && !clip_changed) | |
1208 | { | |
1209 | if (point > startp) | |
1210 | { | |
1211 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1212 | scroll_step, width, hscroll, window); | |
1213 | if (pos.vpos >= height) | |
1214 | goto scroll_fail; | |
1215 | } | |
1216 | ||
1217 | pos = *vmotion (startp, point < startp ? - scroll_step : scroll_step, | |
1218 | width, hscroll, window); | |
1219 | ||
1220 | if (point >= pos.bufpos) | |
1221 | { | |
1222 | try_window (window, pos.bufpos); | |
1223 | if (cursor_vpos >= 0) | |
aa6d10fa RS |
1224 | { |
1225 | if (!just_this_one || clip_changed || beg_unchanged < startp) | |
1226 | /* Forget any recorded base line for line number display. */ | |
1227 | w->base_line_number = Qnil; | |
1228 | goto done; | |
1229 | } | |
a2889657 JB |
1230 | else |
1231 | cancel_my_columns (w); | |
1232 | } | |
1233 | scroll_fail: ; | |
1234 | } | |
1235 | ||
1236 | /* Finally, just choose place to start which centers point */ | |
1237 | ||
1238 | recenter: | |
aa6d10fa RS |
1239 | /* Forget any previously recorded base line for line number display. */ |
1240 | w->base_line_number = Qnil; | |
1241 | ||
a2889657 JB |
1242 | pos = *vmotion (point, - height / 2, width, hscroll, window); |
1243 | try_window (window, pos.bufpos); | |
1244 | ||
1245 | startp = marker_position (w->start); | |
1246 | w->start_at_line_beg = | |
1247 | (startp == BEGV || FETCH_CHAR (startp - 1) == '\n') ? Qt : Qnil; | |
1248 | ||
1249 | done: | |
265a9e55 | 1250 | if ((!NILP (w->update_mode_line) |
aa6d10fa RS |
1251 | /* If window not full width, must redo its mode line |
1252 | if the window to its side is being redone */ | |
1253 | || (!just_this_one && width < FRAME_WIDTH (f) - 1) | |
1254 | || INTEGERP (w->base_line_pos)) | |
a2889657 JB |
1255 | && height != XFASTINT (w->height)) |
1256 | display_mode_line (w); | |
aa6d10fa RS |
1257 | if (! line_number_displayed |
1258 | && ! BUFFERP (w->base_line_pos)) | |
1259 | { | |
1260 | w->base_line_pos = Qnil; | |
1261 | w->base_line_number = Qnil; | |
1262 | } | |
a2889657 | 1263 | |
7ce2c095 RS |
1264 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
1265 | if (!NILP (w->update_mode_line) | |
1266 | && FRAME_MENU_BAR_LINES (f) > 0 | |
1267 | && EQ (FRAME_SELECTED_WINDOW (f), window)) | |
1268 | display_menu_bar (w); | |
1269 | ||
88f22aff JB |
1270 | finish_scroll_bars: |
1271 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) | |
30c566e4 | 1272 | { |
b1d1124b | 1273 | int start, end, whole; |
30c566e4 | 1274 | |
b1d1124b | 1275 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
1276 | At some point, it would be nice to choose between scrollbars |
1277 | which reflect the whole buffer size, with special markers | |
1278 | indicating narrowing, and scrollbars which reflect only the | |
1279 | visible region. | |
1280 | ||
b1d1124b JB |
1281 | Note that minibuffers sometimes aren't displaying any text. */ |
1282 | if (! MINI_WINDOW_P (w) | |
1283 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
1284 | { | |
8a9311d7 | 1285 | whole = ZV - BEGV; |
6887f623 | 1286 | start = startp - BEGV; |
b1d1124b JB |
1287 | /* I don't think this is guaranteed to be right. For the |
1288 | moment, we'll pretend it is. */ | |
85f26be9 | 1289 | end = (Z - XINT (w->window_end_pos)) - BEGV; |
3505ea70 JB |
1290 | |
1291 | if (end < start) end = start; | |
8a9311d7 | 1292 | if (whole < (end - start)) whole = end - start; |
b1d1124b JB |
1293 | } |
1294 | else | |
1295 | start = end = whole = 0; | |
30c566e4 | 1296 | |
88f22aff | 1297 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 1298 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 1299 | |
88f22aff | 1300 | /* Note that we actually used the scroll bar attached to this window, |
30c566e4 | 1301 | so it shouldn't be deleted at the end of redisplay. */ |
88f22aff | 1302 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 1303 | } |
b1d1124b JB |
1304 | |
1305 | SET_PT (opoint); | |
1306 | current_buffer = old; | |
1307 | SET_PT (lpoint); | |
a2889657 JB |
1308 | } |
1309 | \f | |
1310 | /* Do full redisplay on one window, starting at position `pos'. */ | |
1311 | ||
1312 | static void | |
1313 | try_window (window, pos) | |
1314 | Lisp_Object window; | |
1315 | register int pos; | |
1316 | { | |
1317 | register struct window *w = XWINDOW (window); | |
1318 | register int height = window_internal_height (w); | |
1319 | register int vpos = XFASTINT (w->top); | |
1320 | register int last_text_vpos = vpos; | |
1321 | int tab_offset = pos_tab_offset (w, pos); | |
44fa5b1e | 1322 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 1323 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1324 | struct position val; |
1325 | ||
1326 | Fset_marker (w->start, make_number (pos), Qnil); | |
1327 | cursor_vpos = -1; | |
1328 | overlay_arrow_seen = 0; | |
1329 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1330 | ||
1331 | while (--height >= 0) | |
1332 | { | |
1333 | val = *display_text_line (w, pos, vpos, val.hpos, tab_offset); | |
1334 | tab_offset += width; | |
1335 | if (val.vpos) tab_offset = 0; | |
1336 | vpos++; | |
1337 | if (pos != val.bufpos) | |
1338 | last_text_vpos | |
1339 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
b0a0fbda RS |
1340 | = vpos - (val.vpos && (FETCH_CHAR (val.bufpos - 1) != '\n' |
1341 | || ! NILP (Fget_text_property (val.bufpos-1, | |
1342 | Qinvisible, | |
1343 | Fcurrent_buffer ())))); | |
a2889657 JB |
1344 | pos = val.bufpos; |
1345 | } | |
1346 | ||
1347 | /* If last line is continued in middle of character, | |
44fa5b1e | 1348 | include the split character in the text considered on the frame */ |
a2889657 JB |
1349 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
1350 | pos++; | |
1351 | ||
44fa5b1e | 1352 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1353 | if (XFASTINT (w->window_end_pos) == 0 |
1354 | && Z != pos) | |
1355 | w->update_mode_line = Qt; | |
1356 | ||
44fa5b1e | 1357 | /* Say where last char on frame will be, once redisplay is finished. */ |
a2889657 JB |
1358 | XFASTINT (w->window_end_pos) = Z - pos; |
1359 | XFASTINT (w->window_end_vpos) = last_text_vpos - XFASTINT (w->top); | |
1360 | /* But that is not valid info until redisplay finishes. */ | |
1361 | w->window_end_valid = Qnil; | |
1362 | } | |
1363 | \f | |
1364 | /* Try to redisplay when buffer is modified locally, | |
1365 | computing insert/delete line to preserve text outside | |
1366 | the bounds of the changes. | |
1367 | Return 1 if successful, 0 if if cannot tell what to do, | |
1368 | or -1 to tell caller to find a new window start, | |
1369 | or -2 to tell caller to do normal redisplay with same window start. */ | |
1370 | ||
1371 | static int | |
1372 | try_window_id (window) | |
1373 | Lisp_Object window; | |
1374 | { | |
1375 | int pos; | |
1376 | register struct window *w = XWINDOW (window); | |
1377 | register int height = window_internal_height (w); | |
44fa5b1e | 1378 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
1379 | int top = XFASTINT (w->top); |
1380 | int start = marker_position (w->start); | |
b1d1124b | 1381 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1382 | int hscroll = XINT (w->hscroll); |
1383 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
1384 | register int vpos; | |
1385 | register int i, tem; | |
1386 | int last_text_vpos = 0; | |
1387 | int stop_vpos; | |
1388 | ||
1389 | struct position val, bp, ep, xp, pp; | |
1390 | int scroll_amount = 0; | |
1391 | int delta; | |
1392 | int tab_offset, epto; | |
1393 | ||
1394 | if (GPT - BEG < beg_unchanged) | |
1395 | beg_unchanged = GPT - BEG; | |
1396 | if (Z - GPT < end_unchanged) | |
1397 | end_unchanged = Z - GPT; | |
1398 | ||
1399 | if (beg_unchanged + 1 < start) | |
1400 | return 0; /* Give up if changes go above top of window */ | |
1401 | ||
1402 | /* Find position before which nothing is changed. */ | |
1403 | bp = *compute_motion (start, 0, lmargin, | |
f7be7f78 | 1404 | beg_unchanged + 1, height + 1, 0, width, hscroll, |
a2889657 JB |
1405 | pos_tab_offset (w, start)); |
1406 | if (bp.vpos >= height) | |
6e8290aa JB |
1407 | { |
1408 | if (point < bp.bufpos && !bp.contin) | |
1409 | { | |
44fa5b1e JB |
1410 | /* All changes are below the frame, and point is on the frame. |
1411 | We don't need to change the frame at all. | |
6e8290aa JB |
1412 | But we need to update window_end_pos to account for |
1413 | any change in buffer size. */ | |
f7be7f78 JB |
1414 | bp = *compute_motion (start, 0, lmargin, |
1415 | Z, height, 0, | |
1416 | width, hscroll, pos_tab_offset (w, start)); | |
6e8290aa JB |
1417 | XFASTINT (w->window_end_vpos) = height; |
1418 | XFASTINT (w->window_end_pos) = Z - bp.bufpos; | |
1419 | return 1; | |
1420 | } | |
1421 | return 0; | |
1422 | } | |
a2889657 JB |
1423 | |
1424 | vpos = bp.vpos; | |
1425 | ||
44fa5b1e | 1426 | /* Find beginning of that frame line. Must display from there. */ |
a2889657 JB |
1427 | bp = *vmotion (bp.bufpos, 0, width, hscroll, window); |
1428 | ||
1429 | pos = bp.bufpos; | |
1430 | val.hpos = lmargin; | |
1431 | if (pos < start) | |
1432 | return -1; | |
1433 | ||
1434 | /* If about to start displaying at the beginning of a continuation line, | |
44fa5b1e | 1435 | really start with previous frame line, in case it was not |
a2889657 | 1436 | continued when last redisplayed */ |
05ba02eb JB |
1437 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
1438 | || | |
1439 | /* Likewise if we have to worry about selective display. */ | |
1440 | (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1441 | && XINT (current_buffer->selective_display) > 0 | |
1442 | && bp.bufpos - 1 == beg_unchanged && vpos > 0)) | |
a2889657 JB |
1443 | { |
1444 | bp = *vmotion (bp.bufpos, -1, width, hscroll, window); | |
1445 | --vpos; | |
1446 | pos = bp.bufpos; | |
1447 | } | |
1448 | ||
1449 | if (bp.contin && bp.hpos != lmargin) | |
1450 | { | |
1451 | val.hpos = bp.prevhpos - width + lmargin; | |
1452 | pos--; | |
1453 | } | |
1454 | ||
1455 | bp.vpos = vpos; | |
1456 | ||
1457 | /* Find first visible newline after which no more is changed. */ | |
1458 | tem = find_next_newline (Z - max (end_unchanged, Z - ZV), 1); | |
1459 | if (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1460 | && XINT (current_buffer->selective_display) > 0) | |
1461 | while (tem < ZV - 1 | |
1462 | && (position_indentation (tem) | |
1463 | >= XINT (current_buffer->selective_display))) | |
1464 | tem = find_next_newline (tem, 1); | |
1465 | ||
1466 | /* Compute the cursor position after that newline. */ | |
1467 | ep = *compute_motion (pos, vpos, val.hpos, tem, | |
1468 | height, - (1 << (SHORTBITS - 1)), | |
1469 | width, hscroll, pos_tab_offset (w, bp.bufpos)); | |
1470 | ||
44fa5b1e JB |
1471 | /* If changes reach past the text available on the frame, |
1472 | just display rest of frame. */ | |
a2889657 JB |
1473 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
1474 | stop_vpos = height; | |
1475 | else | |
1476 | stop_vpos = ep.vpos; | |
1477 | ||
1478 | /* If no newline before ep, the line ep is on includes some changes | |
1479 | that must be displayed. Make sure we don't stop before it. */ | |
1480 | /* Also, if changes reach all the way until ep.bufpos, | |
1481 | it is possible that something was deleted after the | |
1482 | newline before it, so the following line must be redrawn. */ | |
1483 | if (stop_vpos == ep.vpos | |
1484 | && (ep.bufpos == BEGV | |
1485 | || FETCH_CHAR (ep.bufpos - 1) != '\n' | |
1486 | || ep.bufpos == Z - end_unchanged)) | |
1487 | stop_vpos = ep.vpos + 1; | |
1488 | ||
1489 | cursor_vpos = -1; | |
1490 | overlay_arrow_seen = 0; | |
1491 | ||
1492 | /* If changes do not reach to bottom of window, | |
1493 | figure out how much to scroll the rest of the window */ | |
1494 | if (stop_vpos < height) | |
1495 | { | |
1496 | /* Now determine how far up or down the rest of the window has moved */ | |
1497 | epto = pos_tab_offset (w, ep.bufpos); | |
1498 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1499 | Z - XFASTINT (w->window_end_pos), | |
1500 | 10000, 0, width, hscroll, epto); | |
1501 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); | |
1502 | ||
44fa5b1e | 1503 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
1504 | If so, no scrolling is really necessary. */ |
1505 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
1506 | { | |
1507 | tem = FETCH_CHAR (i); | |
1508 | if (tem != ' ' && tem != '\n' && tem != '\t') | |
1509 | break; | |
1510 | } | |
1511 | if (i == xp.bufpos) | |
1512 | return -2; | |
1513 | ||
1514 | XFASTINT (w->window_end_vpos) += scroll_amount; | |
1515 | ||
44fa5b1e | 1516 | /* Before doing any scrolling, verify that point will be on frame. */ |
a2889657 JB |
1517 | if (point > ep.bufpos && !(point <= xp.bufpos && xp.bufpos < height)) |
1518 | { | |
1519 | if (point <= xp.bufpos) | |
1520 | { | |
1521 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1522 | point, height, - (1 << (SHORTBITS - 1)), | |
1523 | width, hscroll, epto); | |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, | |
1528 | point, height, - (1 << (SHORTBITS - 1)), | |
1529 | width, hscroll, pos_tab_offset (w, xp.bufpos)); | |
1530 | } | |
1531 | if (pp.bufpos < point || pp.vpos == height) | |
1532 | return 0; | |
1533 | cursor_vpos = pp.vpos + top; | |
1534 | cursor_hpos = pp.hpos + XFASTINT (w->left); | |
1535 | } | |
1536 | ||
1537 | if (stop_vpos - scroll_amount >= height | |
1538 | || ep.bufpos == xp.bufpos) | |
1539 | { | |
1540 | if (scroll_amount < 0) | |
1541 | stop_vpos -= scroll_amount; | |
1542 | scroll_amount = 0; | |
1543 | /* In this path, we have altered window_end_vpos | |
1544 | and not left it negative. | |
1545 | We must make sure that, in case display is preempted | |
44fa5b1e | 1546 | before the frame changes to reflect what we do here, |
a2889657 | 1547 | further updates will not come to try_window_id |
44fa5b1e | 1548 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
1549 | blank_end_of_window = 1; |
1550 | } | |
1551 | else if (!scroll_amount) | |
1552 | {} | |
1553 | else if (bp.bufpos == Z - end_unchanged) | |
1554 | { | |
1555 | /* If reprinting everything is nearly as fast as scrolling, | |
1556 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 1557 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1558 | top + height - max (0, scroll_amount), |
1559 | scroll_amount) | |
1560 | > xp.bufpos - bp.bufpos - 20) | |
1561 | /* Return "try normal display with same window-start." | |
1562 | Too bad we can't prevent further scroll-thinking. */ | |
1563 | return -2; | |
1564 | /* If pure deletion, scroll up as many lines as possible. | |
1565 | In common case of killing a line, this can save the | |
1566 | following line from being overwritten by scrolling | |
1567 | and therefore having to be redrawn. */ | |
44fa5b1e | 1568 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1569 | top + height - max (0, scroll_amount), |
1570 | scroll_amount); | |
1571 | if (!tem) stop_vpos = height; | |
1572 | } | |
1573 | else if (scroll_amount) | |
1574 | { | |
1575 | /* If reprinting everything is nearly as fast as scrolling, | |
1576 | don't bother scrolling. Can happen if lines are short. */ | |
1577 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
1578 | overestimate of cost of reprinting, since xp.bufpos | |
1579 | would end up below the bottom of the window. */ | |
44fa5b1e | 1580 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1581 | top + height - max (0, scroll_amount), |
1582 | scroll_amount) | |
1583 | > xp.bufpos - ep.bufpos - 20) | |
1584 | /* Return "try normal display with same window-start." | |
1585 | Too bad we can't prevent further scroll-thinking. */ | |
1586 | return -2; | |
44fa5b1e | 1587 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1588 | top + height - max (0, scroll_amount), |
1589 | scroll_amount); | |
1590 | if (!tem) stop_vpos = height; | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | /* In any case, do not display past bottom of window */ | |
1595 | if (stop_vpos >= height) | |
1596 | { | |
1597 | stop_vpos = height; | |
1598 | scroll_amount = 0; | |
1599 | } | |
1600 | ||
1601 | /* Handle case where pos is before w->start -- | |
1602 | can happen if part of line had been clipped and is not clipped now */ | |
1603 | if (vpos == 0 && pos < marker_position (w->start)) | |
1604 | Fset_marker (w->start, make_number (pos), Qnil); | |
1605 | ||
1606 | /* Redisplay the lines where the text was changed */ | |
1607 | last_text_vpos = vpos; | |
1608 | tab_offset = pos_tab_offset (w, pos); | |
1609 | /* If we are starting display in mid-character, correct tab_offset | |
1610 | to account for passing the line that that character really starts in. */ | |
1611 | if (val.hpos < lmargin) | |
1612 | tab_offset += width; | |
1613 | while (vpos < stop_vpos) | |
1614 | { | |
1615 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1616 | tab_offset += width; | |
1617 | if (val.vpos) tab_offset = 0; | |
1618 | if (pos != val.bufpos) | |
1619 | last_text_vpos | |
1620 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1621 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1622 | pos = val.bufpos; | |
1623 | } | |
1624 | ||
1625 | /* There are two cases: | |
1626 | 1) we have displayed down to the bottom of the window | |
1627 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
1628 | ||
1629 | if (vpos == height) | |
1630 | { | |
1631 | /* If last line is continued in middle of character, | |
44fa5b1e | 1632 | include the split character in the text considered on the frame */ |
a2889657 JB |
1633 | if (val.hpos < lmargin) |
1634 | val.bufpos++; | |
1635 | XFASTINT (w->window_end_vpos) = last_text_vpos; | |
1636 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1637 | } | |
1638 | ||
1639 | /* If scrolling made blank lines at window bottom, | |
1640 | redisplay to fill those lines */ | |
1641 | if (scroll_amount < 0) | |
1642 | { | |
1643 | /* Don't consider these lines for general-purpose scrolling. | |
1644 | That will save time in the scrolling computation. */ | |
44fa5b1e | 1645 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
1646 | vpos = xp.vpos; |
1647 | pos = xp.bufpos; | |
1648 | val.hpos = lmargin; | |
1649 | if (pos == ZV) | |
1650 | vpos = height + scroll_amount; | |
1651 | else if (xp.contin && xp.hpos != lmargin) | |
1652 | { | |
1653 | val.hpos = xp.prevhpos - width + lmargin; | |
1654 | pos--; | |
1655 | } | |
1656 | ||
1657 | blank_end_of_window = 1; | |
1658 | tab_offset = pos_tab_offset (w, pos); | |
1659 | /* If we are starting display in mid-character, correct tab_offset | |
1660 | to account for passing the line that that character starts in. */ | |
1661 | if (val.hpos < lmargin) | |
1662 | tab_offset += width; | |
1663 | ||
1664 | while (vpos < height) | |
1665 | { | |
1666 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1667 | tab_offset += width; | |
1668 | if (val.vpos) tab_offset = 0; | |
1669 | pos = val.bufpos; | |
1670 | } | |
1671 | ||
1672 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
1673 | Make it be fixed up, below. */ | |
1674 | if (xp.bufpos == ZV | |
1675 | && xp.bufpos == point) | |
1676 | cursor_vpos = -1; | |
1677 | } | |
1678 | ||
44fa5b1e | 1679 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1680 | if (XFASTINT (w->window_end_pos) == 0 |
1681 | && Z != val.bufpos) | |
1682 | w->update_mode_line = Qt; | |
1683 | ||
1684 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
1685 | if (scroll_amount) | |
1686 | { | |
1687 | delta = height - xp.vpos; | |
1688 | if (delta < 0 | |
1689 | || (delta > 0 && xp.bufpos <= ZV) | |
1690 | || (delta == 0 && xp.hpos)) | |
1691 | { | |
1692 | val = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1693 | delta, width, hscroll, window); | |
1694 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1695 | XFASTINT (w->window_end_vpos) += val.vpos; | |
1696 | } | |
1697 | } | |
1698 | ||
1699 | w->window_end_valid = Qnil; | |
1700 | ||
1701 | /* If point was not in a line that was displayed, find it */ | |
1702 | if (cursor_vpos < 0) | |
1703 | { | |
1704 | val = *compute_motion (start, 0, lmargin, point, 10000, 10000, | |
1705 | width, hscroll, pos_tab_offset (w, start)); | |
44fa5b1e | 1706 | /* Admit failure if point is off frame now */ |
a2889657 JB |
1707 | if (val.vpos >= height) |
1708 | { | |
1709 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 1710 | cancel_line (vpos + top, f); |
a2889657 JB |
1711 | return 0; |
1712 | } | |
1713 | cursor_vpos = val.vpos + top; | |
1714 | cursor_hpos = val.hpos + XFASTINT (w->left); | |
1715 | } | |
1716 | ||
44fa5b1e JB |
1717 | FRAME_CURSOR_X (f) = max (0, cursor_hpos); |
1718 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
a2889657 JB |
1719 | |
1720 | if (debug_end_pos) | |
1721 | { | |
1722 | val = *compute_motion (start, 0, lmargin, ZV, | |
1723 | height, - (1 << (SHORTBITS - 1)), | |
1724 | width, hscroll, pos_tab_offset (w, start)); | |
1725 | if (val.vpos != XFASTINT (w->window_end_vpos)) | |
1726 | abort (); | |
1727 | if (XFASTINT (w->window_end_pos) | |
1728 | != Z - val.bufpos) | |
1729 | abort (); | |
1730 | } | |
1731 | ||
1732 | return 1; | |
1733 | } | |
1734 | \f | |
31b24551 JB |
1735 | /* Mark a section of BUF as modified, but only for the sake of redisplay. |
1736 | This is useful for recording changes to overlays. | |
1737 | ||
1738 | We increment the buffer's modification timestamp and set the | |
1739 | redisplay caches (windows_or_buffers_changed, beg_unchanged, etc) | |
1740 | as if the region of text between START and END had been modified; | |
1741 | the redisplay code will check this against the windows' timestamps, | |
1742 | and redraw the appropriate area of the buffer. | |
1743 | ||
1744 | However, if the buffer is unmodified, we bump the last-save | |
1745 | timestamp as well, so that incrementing the timestamp doesn't fool | |
1746 | Emacs into thinking that the buffer's text has been modified. | |
1747 | ||
1748 | Tweaking the timestamps shouldn't hurt the first-modification | |
1749 | timestamps recorded in the undo records; those values aren't | |
1750 | written until just before a real text modification is made, so they | |
1751 | will never catch the timestamp value just before this function gets | |
1752 | called. */ | |
1753 | ||
1754 | void | |
1755 | redisplay_region (buf, start, end) | |
1756 | struct buffer *buf; | |
1757 | int start, end; | |
1758 | { | |
1759 | if (start == end) | |
1760 | return; | |
1761 | ||
1762 | if (start > end) | |
1763 | { | |
1764 | int temp = start; | |
1765 | start = end; end = temp; | |
1766 | } | |
1767 | ||
1768 | if (buf != current_buffer) | |
1769 | windows_or_buffers_changed = 1; | |
1770 | else | |
1771 | { | |
1772 | if (unchanged_modified == MODIFF) | |
1773 | { | |
1774 | beg_unchanged = start - BEG; | |
1775 | end_unchanged = Z - end; | |
1776 | } | |
1777 | else | |
1778 | { | |
1779 | if (Z - end < end_unchanged) | |
1780 | end_unchanged = Z - end; | |
1781 | if (start - BEG < beg_unchanged) | |
1782 | beg_unchanged = start - BEG; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | /* Increment the buffer's time stamp, but also increment the save | |
1787 | and autosave timestamps, so as not to screw up that timekeeping. */ | |
1788 | if (BUF_MODIFF (buf) == buf->save_modified) | |
1789 | buf->save_modified++; | |
1790 | if (BUF_MODIFF (buf) == buf->auto_save_modified) | |
1791 | buf->auto_save_modified++; | |
1792 | ||
1793 | BUF_MODIFF (buf) ++; | |
1794 | } | |
1795 | ||
1796 | \f | |
c581d710 | 1797 | /* Copy glyphs from the vector FROM to the rope T. |
f7430cb6 | 1798 | But don't actually copy the parts that would come in before S. |
c581d710 | 1799 | Value is T, advanced past the copied data. */ |
a2889657 JB |
1800 | |
1801 | GLYPH * | |
1c2250c2 | 1802 | copy_rope (t, s, from, face) |
a2889657 JB |
1803 | register GLYPH *t; /* Copy to here. */ |
1804 | register GLYPH *s; /* Starting point. */ | |
1c2250c2 JB |
1805 | Lisp_Object from; /* Data to copy; known to be a vector. */ |
1806 | int face; /* Face to apply to glyphs which don't specify one. */ | |
a2889657 | 1807 | { |
c581d710 RS |
1808 | register int n = XVECTOR (from)->size; |
1809 | register Lisp_Object *f = XVECTOR (from)->contents; | |
1810 | ||
1811 | while (n--) | |
1812 | { | |
b2a76982 RS |
1813 | int glyph = XFASTINT (*f); |
1814 | ||
1815 | if (t >= s) *t = MAKE_GLYPH (GLYPH_CHAR (glyph), | |
1816 | (GLYPH_FACE (glyph) | |
1817 | ? GLYPH_FACE (glyph) | |
1c2250c2 | 1818 | : face)); |
c581d710 RS |
1819 | ++t; |
1820 | ++f; | |
1821 | } | |
1822 | return t; | |
1823 | } | |
1824 | ||
68a37fa8 RS |
1825 | /* Copy exactly LEN glyphs from FROM into data at T. |
1826 | But don't alter words before S. */ | |
c581d710 RS |
1827 | |
1828 | GLYPH * | |
1c2250c2 | 1829 | copy_part_of_rope (t, s, from, len, face) |
c581d710 RS |
1830 | register GLYPH *t; /* Copy to here. */ |
1831 | register GLYPH *s; /* Starting point. */ | |
1c2250c2 | 1832 | Lisp_Object *from; /* Data to copy. */ |
c581d710 | 1833 | int len; |
1c2250c2 | 1834 | int face; /* Face to apply to glyphs which don't specify one. */ |
c581d710 | 1835 | { |
68a37fa8 RS |
1836 | int n = len; |
1837 | register Lisp_Object *f = from; | |
a2889657 JB |
1838 | |
1839 | while (n--) | |
1840 | { | |
b2a76982 RS |
1841 | int glyph = XFASTINT (*f); |
1842 | ||
1843 | if (t >= s) *t = MAKE_GLYPH (GLYPH_CHAR (glyph), | |
1844 | (GLYPH_FACE (glyph) | |
1845 | ? GLYPH_FACE (glyph) | |
1c2250c2 | 1846 | : face)); |
a2889657 JB |
1847 | ++t; |
1848 | ++f; | |
1849 | } | |
1850 | return t; | |
1851 | } | |
1852 | \f | |
1853 | /* Display one line of window w, starting at position START in W's buffer. | |
1854 | Display starting at horizontal position HPOS, which is normally zero | |
1855 | or negative. A negative value causes output up to hpos = 0 to be discarded. | |
1856 | This is done for negative hscroll, or when this is a continuation line | |
1857 | and the continuation occurred in the middle of a multi-column character. | |
1858 | ||
1859 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
1860 | ||
44fa5b1e | 1861 | Display on position VPOS on the frame. (origin 0). |
a2889657 JB |
1862 | |
1863 | Returns a STRUCT POSITION giving character to start next line with | |
1864 | and where to display it, including a zero or negative hpos. | |
1865 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
1866 | ||
1867 | struct position val_display_text_line; | |
1868 | ||
1869 | static struct position * | |
1870 | display_text_line (w, start, vpos, hpos, taboffset) | |
1871 | struct window *w; | |
1872 | int start; | |
1873 | int vpos; | |
1874 | int hpos; | |
1875 | int taboffset; | |
1876 | { | |
1877 | register int pos = start; | |
1878 | register int c; | |
1879 | register GLYPH *p1; | |
1880 | int end; | |
1881 | register int pause; | |
1882 | register unsigned char *p; | |
1883 | GLYPH *endp; | |
1884 | register GLYPH *startp; | |
5fcbb24d | 1885 | register GLYPH *p1prev = 0; |
44fa5b1e | 1886 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 1887 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 1888 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 1889 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1890 | struct position val; |
1891 | int lastpos; | |
1892 | int invis; | |
1893 | int hscroll = XINT (w->hscroll); | |
1894 | int truncate = hscroll | |
1895 | || (truncate_partial_width_windows | |
44fa5b1e | 1896 | && XFASTINT (w->width) < FRAME_WIDTH (f)) |
265a9e55 | 1897 | || !NILP (current_buffer->truncate_lines); |
bd66d1ba RS |
1898 | |
1899 | /* 1 if we should highlight the region. */ | |
1900 | int highlight_region | |
1901 | = !NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active); | |
1902 | int region_beg, region_end; | |
1903 | ||
a2889657 JB |
1904 | int selective |
1905 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1906 | ? XINT (current_buffer->selective_display) | |
265a9e55 | 1907 | : !NILP (current_buffer->selective_display) ? -1 : 0; |
44fa5b1e | 1908 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
a2889657 | 1909 | register struct Lisp_Vector *dp = window_display_table (w); |
68a37fa8 RS |
1910 | |
1911 | Lisp_Object default_invis_vector[3]; | |
1912 | /* Nonzero means display something where there are invisible lines. | |
1913 | The precise value is the number of glyphs to display. */ | |
a2889657 | 1914 | int selective_rlen |
c581d710 | 1915 | = (selective && dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector |
68a37fa8 RS |
1916 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->size |
1917 | : selective && !NILP (current_buffer->selective_display_ellipses) | |
1918 | ? 3 : 0); | |
1919 | /* This is the sequence of Lisp objects to display | |
1920 | when there are invisible lines. */ | |
1921 | Lisp_Object *invis_vector_contents | |
1922 | = (dp && XTYPE (DISP_INVIS_VECTOR (dp)) == Lisp_Vector | |
1923 | ? XVECTOR (DISP_INVIS_VECTOR (dp))->contents | |
1924 | : default_invis_vector); | |
1925 | ||
a2889657 JB |
1926 | GLYPH truncator = (dp == 0 || XTYPE (DISP_TRUNC_GLYPH (dp)) != Lisp_Int |
1927 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); | |
1928 | GLYPH continuer = (dp == 0 || XTYPE (DISP_CONTINUE_GLYPH (dp)) != Lisp_Int | |
1929 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); | |
1930 | ||
31b24551 JB |
1931 | /* The next buffer location at which the face should change, due |
1932 | to overlays or text property changes. */ | |
1933 | int next_face_change; | |
1934 | ||
b0a0fbda RS |
1935 | #ifdef USE_TEXT_PROPERTIES |
1936 | /* The next location where the `invisible' property changes */ | |
1937 | int next_invisible; | |
b0a0fbda RS |
1938 | #endif |
1939 | ||
31b24551 | 1940 | /* The face we're currently using. */ |
1c2250c2 | 1941 | int current_face = 0; |
31b24551 | 1942 | |
68a37fa8 RS |
1943 | XFASTINT (default_invis_vector[2]) = '.'; |
1944 | default_invis_vector[0] = default_invis_vector[1] = default_invis_vector[2]; | |
1945 | ||
a2889657 | 1946 | hpos += XFASTINT (w->left); |
44fa5b1e | 1947 | get_display_line (f, vpos, XFASTINT (w->left)); |
54ff581a | 1948 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 | 1949 | |
bd66d1ba | 1950 | /* Show where to highlight the region. */ |
1613b757 | 1951 | if (highlight_region && XMARKER (current_buffer->mark)->buffer != 0 |
fba9ce76 RS |
1952 | /* Maybe highlight only in selected window. */ |
1953 | && (highlight_nonselected_windows | |
6f139a45 | 1954 | || w == XWINDOW (selected_window))) |
bd66d1ba RS |
1955 | { |
1956 | region_beg = marker_position (current_buffer->mark); | |
1957 | if (PT < region_beg) | |
1958 | { | |
1959 | region_end = region_beg; | |
1960 | region_beg = PT; | |
1961 | } | |
1962 | else | |
1963 | region_end = PT; | |
1964 | w->region_showing = Qt; | |
1965 | } | |
1966 | else | |
1967 | region_beg = region_end = -1; | |
1968 | ||
a2889657 JB |
1969 | if (MINI_WINDOW_P (w) && start == 1 |
1970 | && vpos == XFASTINT (w->top)) | |
1971 | { | |
1972 | if (minibuf_prompt) | |
90adcf20 | 1973 | hpos = display_string (w, vpos, minibuf_prompt, -1, hpos, |
a2889657 JB |
1974 | (!truncate ? continuer : truncator), |
1975 | -1, -1); | |
1976 | minibuf_prompt_width = hpos; | |
1977 | } | |
1978 | ||
1979 | desired_glyphs->bufp[vpos] = pos; | |
1980 | p1 = desired_glyphs->glyphs[vpos] + hpos; | |
1981 | end = ZV; | |
1982 | startp = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
1983 | endp = startp + width; | |
1984 | ||
1c2250c2 JB |
1985 | /* Arrange the overlays nicely for our purposes. Usually, we call |
1986 | display_text_line on only one line at a time, in which case this | |
1987 | can't really hurt too much, or we call it on lines which appear | |
1988 | one after another in the buffer, in which case all calls to | |
1989 | recenter_overlay_lists but the first will be pretty cheap. */ | |
1990 | recenter_overlay_lists (current_buffer, pos); | |
1991 | ||
a2889657 JB |
1992 | /* Loop generating characters. |
1993 | Stop at end of buffer, before newline, | |
31b24551 JB |
1994 | if reach or pass continuation column, |
1995 | or at face change. */ | |
a2889657 | 1996 | pause = pos; |
31b24551 | 1997 | next_face_change = pos; |
b0a0fbda RS |
1998 | #ifdef USE_TEXT_PROPERTIES |
1999 | next_invisible = pos; | |
2000 | #endif | |
a2889657 JB |
2001 | while (p1 < endp) |
2002 | { | |
2003 | p1prev = p1; | |
31b24551 | 2004 | if (pos >= pause) |
a2889657 | 2005 | { |
31b24551 JB |
2006 | /* Did we hit the end of the visible region of the buffer? |
2007 | Stop here. */ | |
2008 | if (pos >= end) | |
a2889657 | 2009 | break; |
31b24551 JB |
2010 | |
2011 | /* Did we reach point? Record the cursor location. */ | |
a2889657 JB |
2012 | if (pos == point && cursor_vpos < 0) |
2013 | { | |
2014 | cursor_vpos = vpos; | |
2015 | cursor_hpos = p1 - startp; | |
2016 | } | |
2017 | ||
b0a0fbda RS |
2018 | #ifdef USE_TEXT_PROPERTIES |
2019 | /* if the `invisible' property is set to t, we can skip to | |
2020 | the next property change */ | |
2021 | while (pos == next_invisible && pos < end) | |
b0a0fbda | 2022 | { |
dfabd9a0 RS |
2023 | Lisp_Object position, limit, endpos, prop; |
2024 | XFASTINT (position) = pos; | |
2025 | prop = Fget_text_property (position, Qinvisible, | |
2026 | Fcurrent_buffer ()); | |
2027 | /* This is just an estimate to give reasonable | |
2028 | performance; nothing should go wrong if it is too small. */ | |
2029 | XFASTINT (limit) = pos + 50; | |
2030 | endpos | |
2031 | = Fnext_single_property_change (position, Qinvisible, | |
2032 | Fcurrent_buffer (), limit); | |
2033 | if (INTEGERP (endpos)) | |
2034 | next_invisible = XINT (endpos); | |
2035 | else | |
2036 | next_invisible = end; | |
2037 | if (! NILP (prop)) | |
2038 | { | |
2039 | if (pos < point && next_invisible >= point) | |
2040 | { | |
2041 | cursor_vpos = vpos; | |
2042 | cursor_hpos = p1 - startp; | |
2043 | } | |
2044 | pos = next_invisible; | |
2045 | } | |
b0a0fbda | 2046 | } |
b0a0fbda RS |
2047 | if (pos >= end) |
2048 | break; | |
2049 | #endif | |
2050 | ||
9dbd4b48 | 2051 | #ifdef HAVE_X_WINDOWS |
31b24551 JB |
2052 | /* Did we hit a face change? Figure out what face we should |
2053 | use now. We also hit this the first time through the | |
2054 | loop, to see what face we should start with. */ | |
b0a0fbda | 2055 | if (pos >= next_face_change && FRAME_X_P (f)) |
bd66d1ba RS |
2056 | current_face = compute_char_face (f, w, pos, |
2057 | region_beg, region_end, | |
dfabd9a0 | 2058 | &next_face_change, pos + 50); |
9dbd4b48 | 2059 | #endif |
31b24551 | 2060 | |
1c2250c2 JB |
2061 | pause = end; |
2062 | ||
b0a0fbda RS |
2063 | #ifdef USE_TEXT_PROPERTIES |
2064 | if (pos < next_invisible && next_invisible < pause) | |
2065 | pause = next_invisible; | |
2066 | #endif | |
1c2250c2 JB |
2067 | if (pos < next_face_change && next_face_change < pause) |
2068 | pause = next_face_change; | |
2069 | ||
31b24551 JB |
2070 | /* Wouldn't you hate to read the next line to someone over |
2071 | the phone? */ | |
a2889657 JB |
2072 | if (pos < point && point < pause) |
2073 | pause = point; | |
2074 | if (pos < GPT && GPT < pause) | |
2075 | pause = GPT; | |
2076 | ||
2077 | p = &FETCH_CHAR (pos); | |
2078 | } | |
2079 | c = *p++; | |
2080 | if (c >= 040 && c < 0177 | |
c581d710 | 2081 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
2082 | { |
2083 | if (p1 >= startp) | |
1c2250c2 | 2084 | *p1 = MAKE_GLYPH (c, current_face); |
a2889657 JB |
2085 | p1++; |
2086 | } | |
2087 | else if (c == '\n') | |
2088 | { | |
2089 | invis = 0; | |
2090 | while (pos < end | |
2091 | && selective > 0 | |
2092 | && position_indentation (pos + 1) >= selective) | |
2093 | { | |
2094 | invis = 1; | |
2095 | pos = find_next_newline (pos + 1, 1); | |
2096 | if (FETCH_CHAR (pos - 1) == '\n') | |
2097 | pos--; | |
2098 | } | |
2099 | if (invis && selective_rlen > 0 && p1 >= startp) | |
2100 | { | |
2101 | p1 += selective_rlen; | |
2102 | if (p1 - startp > width) | |
2103 | p1 = endp; | |
68a37fa8 | 2104 | copy_part_of_rope (p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 2105 | (p1 - p1prev), current_face); |
a2889657 | 2106 | } |
3c5c35c5 JB |
2107 | #if 1 |
2108 | /* Draw the face of the newline character as extending all the | |
2109 | way to the end of the frame line. */ | |
2110 | if (current_face) | |
2111 | while (p1 < endp) | |
2112 | *p1++ = MAKE_GLYPH (' ', current_face); | |
2113 | #endif | |
68a37fa8 | 2114 | break; |
a2889657 JB |
2115 | } |
2116 | else if (c == '\t') | |
2117 | { | |
2118 | do | |
2119 | { | |
2120 | if (p1 >= startp && p1 < endp) | |
1c2250c2 | 2121 | *p1 = MAKE_GLYPH (' ', current_face); |
a2889657 JB |
2122 | p1++; |
2123 | } | |
2124 | while ((p1 - startp + taboffset + hscroll - (hscroll > 0)) | |
2125 | % tab_width); | |
2126 | } | |
6e8290aa | 2127 | else if (c == Ctl ('M') && selective == -1) |
a2889657 JB |
2128 | { |
2129 | pos = find_next_newline (pos, 1); | |
2130 | if (FETCH_CHAR (pos - 1) == '\n') | |
2131 | pos--; | |
2132 | if (selective_rlen > 0) | |
2133 | { | |
2134 | p1 += selective_rlen; | |
2135 | if (p1 - startp > width) | |
2136 | p1 = endp; | |
68a37fa8 | 2137 | copy_part_of_rope (p1prev, p1prev, invis_vector_contents, |
1c2250c2 | 2138 | (p1 - p1prev), current_face); |
a2889657 | 2139 | } |
3c5c35c5 JB |
2140 | #if 1 |
2141 | /* Draw the face of the newline character as extending all the | |
2142 | way to the end of the frame line. */ | |
2143 | if (current_face) | |
2144 | while (p1 < endp) | |
2145 | *p1++ = MAKE_GLYPH (' ', current_face); | |
2146 | #endif | |
68a37fa8 | 2147 | break; |
a2889657 | 2148 | } |
c581d710 | 2149 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
a2889657 | 2150 | { |
1c2250c2 | 2151 | p1 = copy_rope (p1, startp, DISP_CHAR_VECTOR (dp, c), current_face); |
a2889657 JB |
2152 | } |
2153 | else if (c < 0200 && ctl_arrow) | |
2154 | { | |
2155 | if (p1 >= startp) | |
31b24551 JB |
2156 | *p1 = MAKE_GLYPH ((dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int |
2157 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'), | |
1c2250c2 | 2158 | current_face); |
a2889657 | 2159 | p1++; |
6e8290aa | 2160 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 2161 | *p1 = MAKE_GLYPH (c ^ 0100, current_face); |
a2889657 JB |
2162 | p1++; |
2163 | } | |
2164 | else | |
2165 | { | |
2166 | if (p1 >= startp) | |
31b24551 JB |
2167 | *p1 = MAKE_GLYPH ((dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int |
2168 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'), | |
1c2250c2 | 2169 | current_face); |
a2889657 | 2170 | p1++; |
6e8290aa | 2171 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 2172 | *p1 = MAKE_GLYPH ((c >> 6) + '0', current_face); |
a2889657 | 2173 | p1++; |
6e8290aa | 2174 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 2175 | *p1 = MAKE_GLYPH ((7 & (c >> 3)) + '0', current_face); |
a2889657 | 2176 | p1++; |
6e8290aa | 2177 | if (p1 >= startp && p1 < endp) |
1c2250c2 | 2178 | *p1 = MAKE_GLYPH ((7 & c) + '0', current_face); |
a2889657 JB |
2179 | p1++; |
2180 | } | |
31b24551 | 2181 | |
a2889657 JB |
2182 | pos++; |
2183 | } | |
2184 | ||
2185 | val.hpos = - XINT (w->hscroll); | |
2186 | if (val.hpos) | |
2187 | val.hpos++; | |
2188 | ||
2189 | val.vpos = 1; | |
2190 | ||
2191 | lastpos = pos; | |
2192 | ||
2193 | /* Handle continuation in middle of a character */ | |
2194 | /* by backing up over it */ | |
2195 | if (p1 > endp) | |
2196 | { | |
5fcbb24d JB |
2197 | /* Don't back up if we never actually displayed any text. |
2198 | This occurs when the minibuffer prompt takes up the whole line. */ | |
2199 | if (p1prev) | |
2200 | { | |
2201 | /* Start the next line with that same character */ | |
2202 | pos--; | |
2203 | /* but at negative hpos, to skip the columns output on this line. */ | |
2204 | val.hpos += p1prev - endp; | |
2205 | } | |
2206 | ||
a2889657 JB |
2207 | /* Keep in this line everything up to the continuation column. */ |
2208 | p1 = endp; | |
2209 | } | |
2210 | ||
2211 | /* Finish deciding which character to start the next line on, | |
2212 | and what hpos to start it at. | |
2213 | Also set `lastpos' to the last position which counts as "on this line" | |
2214 | for cursor-positioning. */ | |
2215 | ||
2216 | if (pos < ZV) | |
2217 | { | |
2218 | if (FETCH_CHAR (pos) == '\n') | |
2219 | /* If stopped due to a newline, start next line after it */ | |
2220 | pos++; | |
2221 | else | |
2222 | /* Stopped due to right margin of window */ | |
2223 | { | |
2224 | if (truncate) | |
2225 | { | |
2226 | *p1++ = truncator; | |
2227 | /* Truncating => start next line after next newline, | |
2228 | and point is on this line if it is before the newline, | |
2229 | and skip none of first char of next line */ | |
2230 | pos = find_next_newline (pos, 1); | |
2231 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
2232 | ||
2233 | lastpos = pos - (FETCH_CHAR (pos - 1) == '\n'); | |
2234 | } | |
2235 | else | |
2236 | { | |
2237 | *p1++ = continuer; | |
2238 | val.vpos = 0; | |
2239 | lastpos--; | |
2240 | } | |
2241 | } | |
2242 | } | |
2243 | ||
2244 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 2245 | record its frame location now. */ |
a2889657 JB |
2246 | |
2247 | if (start <= point && point <= lastpos && cursor_vpos < 0) | |
2248 | { | |
2249 | cursor_vpos = vpos; | |
2250 | cursor_hpos = p1 - startp; | |
2251 | } | |
2252 | ||
2253 | if (cursor_vpos == vpos) | |
2254 | { | |
2255 | if (cursor_hpos < 0) cursor_hpos = 0; | |
2256 | if (cursor_hpos > width) cursor_hpos = width; | |
2257 | cursor_hpos += XFASTINT (w->left); | |
44fa5b1e | 2258 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 2259 | { |
44fa5b1e JB |
2260 | FRAME_CURSOR_Y (f) = cursor_vpos; |
2261 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 JB |
2262 | |
2263 | if (w == XWINDOW (selected_window)) | |
2264 | { | |
2265 | /* Line is not continued and did not start | |
2266 | in middle of character */ | |
2267 | if ((hpos - XFASTINT (w->left) | |
2268 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
2269 | && val.vpos) | |
2270 | { | |
2271 | this_line_bufpos = start; | |
2272 | this_line_buffer = current_buffer; | |
2273 | this_line_vpos = cursor_vpos; | |
2274 | this_line_start_hpos = hpos; | |
2275 | this_line_endpos = Z - lastpos; | |
2276 | } | |
2277 | else | |
2278 | this_line_bufpos = 0; | |
2279 | } | |
2280 | } | |
2281 | } | |
2282 | ||
2283 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
2284 | if (hscroll && lastpos != start) | |
2285 | { | |
2286 | *startp = truncator; | |
2287 | if (p1 <= startp) | |
2288 | p1 = startp + 1; | |
2289 | } | |
2290 | ||
44fa5b1e | 2291 | if (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)) |
a2889657 JB |
2292 | { |
2293 | endp++; | |
2294 | if (p1 < startp) p1 = startp; | |
2295 | while (p1 < endp) *p1++ = SPACEGLYPH; | |
b1d1124b | 2296 | |
88f22aff JB |
2297 | /* Don't draw vertical bars if we're using scroll bars. They're |
2298 | covered up by the scroll bars, and it's distracting to see | |
2299 | them when the scroll bar windows are flickering around to be | |
b1d1124b | 2300 | reconfigured. */ |
88f22aff | 2301 | *p1++ = (FRAME_HAS_VERTICAL_SCROLL_BARS (f) |
b1d1124b | 2302 | ? ' ' : '|'); |
a2889657 JB |
2303 | } |
2304 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
2305 | p1 - desired_glyphs->glyphs[vpos]); | |
2306 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2307 | ||
2308 | /* If the start of this line is the overlay arrow-position, | |
2309 | then put the arrow string into the display-line. */ | |
2310 | ||
2311 | if (XTYPE (Voverlay_arrow_position) == Lisp_Marker | |
2312 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer | |
2313 | && start == marker_position (Voverlay_arrow_position) | |
2314 | && XTYPE (Voverlay_arrow_string) == Lisp_String | |
2315 | && ! overlay_arrow_seen) | |
2316 | { | |
2317 | unsigned char *p = XSTRING (Voverlay_arrow_string)->data; | |
2318 | int i; | |
2319 | int len = XSTRING (Voverlay_arrow_string)->size; | |
142be3dd | 2320 | int arrow_end; |
a2889657 | 2321 | |
b1d1124b JB |
2322 | if (len > width) |
2323 | len = width; | |
a2889657 JB |
2324 | for (i = 0; i < len; i++) |
2325 | startp[i] = p[i]; | |
142be3dd JB |
2326 | |
2327 | /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */ | |
2328 | arrow_end = (startp - desired_glyphs->glyphs[vpos]) + len; | |
2329 | if (desired_glyphs->used[vpos] < arrow_end) | |
2330 | desired_glyphs->used[vpos] = arrow_end; | |
a2889657 JB |
2331 | |
2332 | overlay_arrow_seen = 1; | |
2333 | } | |
2334 | ||
2335 | val.bufpos = pos; | |
2336 | val_display_text_line = val; | |
2337 | return &val_display_text_line; | |
2338 | } | |
2339 | \f | |
7ce2c095 RS |
2340 | /* Redisplay the menu bar in the frame for window W. */ |
2341 | ||
2342 | static void | |
2343 | display_menu_bar (w) | |
2344 | struct window *w; | |
2345 | { | |
2346 | Lisp_Object items, tail; | |
2347 | register int vpos = 0; | |
2348 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
2349 | int maxendcol = FRAME_WIDTH (f); | |
2350 | int hpos = 0; | |
2351 | ||
2352 | if (FRAME_MENU_BAR_LINES (f) <= 0) | |
2353 | return; | |
2354 | ||
2355 | get_display_line (f, vpos, 0); | |
2356 | ||
2d66ad19 | 2357 | for (tail = FRAME_MENU_BAR_ITEMS (f); CONSP (tail); tail = XCONS (tail)->cdr) |
7ce2c095 RS |
2358 | { |
2359 | Lisp_Object string; | |
2d66ad19 | 2360 | |
7ce2c095 RS |
2361 | string = XCONS (XCONS (XCONS (tail)->car)->cdr)->car; |
2362 | ||
2363 | /* Record in each item its hpos. */ | |
2364 | XFASTINT (XCONS (XCONS (XCONS (tail)->car)->cdr)->cdr) = hpos; | |
2365 | ||
2366 | if (hpos < maxendcol) | |
2367 | hpos = display_string (XWINDOW (FRAME_ROOT_WINDOW (f)), vpos, | |
2368 | XSTRING (string)->data, | |
90adcf20 | 2369 | XSTRING (string)->size, |
2d66ad19 RS |
2370 | hpos, 0, hpos, maxendcol); |
2371 | /* Put a gap of 3 spaces between items. */ | |
2372 | if (hpos < maxendcol) | |
2373 | { | |
2374 | int hpos1 = hpos + 3; | |
90adcf20 | 2375 | hpos = display_string (w, vpos, "", 0, hpos, 0, |
2d66ad19 RS |
2376 | min (hpos1, maxendcol), maxendcol); |
2377 | } | |
7ce2c095 RS |
2378 | } |
2379 | ||
2380 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; | |
2381 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
2d66ad19 RS |
2382 | |
2383 | /* Fill out the line with spaces. */ | |
2384 | if (maxendcol > hpos) | |
90adcf20 | 2385 | hpos = display_string (w, vpos, "", 0, hpos, 0, maxendcol, -1); |
db6f348c JB |
2386 | |
2387 | /* Clear the rest of the lines allocated to the menu bar. */ | |
2388 | vpos++; | |
2389 | while (vpos < FRAME_MENU_BAR_LINES (f)) | |
2390 | get_display_line (f, vpos++, 0); | |
7ce2c095 RS |
2391 | } |
2392 | \f | |
a2889657 JB |
2393 | /* Display the mode line for window w */ |
2394 | ||
2395 | static void | |
2396 | display_mode_line (w) | |
2397 | struct window *w; | |
2398 | { | |
2399 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
2400 | register int left = XFASTINT (w->left); | |
2401 | register int right = XFASTINT (w->width) + left; | |
44fa5b1e | 2402 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 2403 | |
aa6d10fa RS |
2404 | line_number_displayed = 0; |
2405 | ||
44fa5b1e | 2406 | get_display_line (f, vpos, left); |
a2889657 JB |
2407 | display_mode_element (w, vpos, left, 0, right, right, |
2408 | current_buffer->mode_line_format); | |
44fa5b1e | 2409 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 JB |
2410 | |
2411 | /* Make the mode line inverse video if the entire line | |
2412 | is made of mode lines. | |
2413 | I.e. if this window is full width, | |
2414 | or if it is the child of a full width window | |
2415 | (which implies that that window is split side-by-side | |
2416 | and the rest of this line is mode lines of the sibling windows). */ | |
44fa5b1e JB |
2417 | if (XFASTINT (w->width) == FRAME_WIDTH (f) |
2418 | || XFASTINT (XWINDOW (w->parent)->width) == FRAME_WIDTH (f)) | |
2419 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
a2889657 JB |
2420 | |
2421 | #ifdef HAVE_X_WINDOWS | |
2422 | /* I'm trying this out because I saw Unimpress use it, but it's | |
0956dd96 | 2423 | possible that this may mess adversely with some window managers. -jla |
a2889657 | 2424 | |
0956dd96 JB |
2425 | Wouldn't it be nice to use something like mode-line-format to |
2426 | describe frame titles? -JimB */ | |
2427 | ||
2428 | /* Change the title of the frame to the name of the buffer displayed | |
2429 | in the currently selected window. Don't do this for minibuffer frames, | |
2430 | and don't do it when there's only one non-minibuffer frame. */ | |
22aefb49 | 2431 | if (FRAME_X_P (f) |
44fa5b1e | 2432 | && ! FRAME_MINIBUF_ONLY_P (f) |
69ced0fa | 2433 | && w == XWINDOW (f->selected_window)) |
0956dd96 JB |
2434 | x_implicitly_set_name (f, (EQ (Fnext_frame (WINDOW_FRAME (w), Qnil), |
2435 | WINDOW_FRAME (w)) | |
2436 | ? Qnil | |
2437 | : XBUFFER (w->buffer)->name), | |
11e82b76 | 2438 | Qnil); |
a2889657 JB |
2439 | #endif |
2440 | } | |
2441 | ||
2442 | /* Contribute ELT to the mode line for window W. | |
2443 | How it translates into text depends on its data type. | |
2444 | ||
2445 | VPOS is the position of the mode line being displayed. | |
2446 | ||
44fa5b1e | 2447 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
2448 | should start. The output is truncated automatically at the right |
2449 | edge of window W. | |
2450 | ||
2451 | DEPTH is the depth in recursion. It is used to prevent | |
2452 | infinite recursion here. | |
2453 | ||
2454 | MINENDCOL is the hpos before which the element may not end. | |
2455 | The element is padded at the right with spaces if nec | |
2456 | to reach this column. | |
2457 | ||
2458 | MAXENDCOL is the hpos past which this element may not extend. | |
2459 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
2460 | (This is necessary to make nested padding and truncation work.) | |
2461 | ||
2462 | Returns the hpos of the end of the text generated by ELT. | |
2463 | The next element will receive that value as its HPOS arg, | |
2464 | so as to concatenate the elements. */ | |
2465 | ||
2466 | static int | |
2467 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
2468 | struct window *w; | |
2469 | register int vpos, hpos; | |
2470 | int depth; | |
2471 | int minendcol; | |
2472 | register int maxendcol; | |
2473 | register Lisp_Object elt; | |
2474 | { | |
2475 | tail_recurse: | |
2476 | if (depth > 10) | |
2477 | goto invalid; | |
2478 | ||
2479 | depth++; | |
2480 | ||
2481 | #ifdef SWITCH_ENUM_BUG | |
2482 | switch ((int) XTYPE (elt)) | |
2483 | #else | |
2484 | switch (XTYPE (elt)) | |
2485 | #endif | |
2486 | { | |
2487 | case Lisp_String: | |
2488 | { | |
2489 | /* A string: output it and check for %-constructs within it. */ | |
2490 | register unsigned char c; | |
2491 | register unsigned char *this = XSTRING (elt)->data; | |
2492 | ||
2493 | while (hpos < maxendcol && *this) | |
2494 | { | |
2495 | unsigned char *last = this; | |
2496 | while ((c = *this++) != '\0' && c != '%') | |
2497 | ; | |
2498 | if (this - 1 != last) | |
2499 | { | |
2500 | register int lim = --this - last + hpos; | |
90adcf20 | 2501 | hpos = display_string (w, vpos, last, -1, hpos, 0, hpos, |
a2889657 JB |
2502 | min (lim, maxendcol)); |
2503 | } | |
2504 | else /* c == '%' */ | |
2505 | { | |
2506 | register int spec_width = 0; | |
2507 | ||
2508 | /* We can't allow -ve args due to the "%-" construct */ | |
2509 | /* Argument specifies minwidth but not maxwidth | |
2510 | (maxwidth can be specified by | |
2511 | (<negative-number> . <stuff>) mode-line elements) */ | |
2512 | ||
2513 | while ((c = *this++) >= '0' && c <= '9') | |
2514 | { | |
2515 | spec_width = spec_width * 10 + (c - '0'); | |
2516 | } | |
2517 | ||
2518 | spec_width += hpos; | |
2519 | if (spec_width > maxendcol) | |
2520 | spec_width = maxendcol; | |
2521 | ||
2522 | if (c == 'M') | |
2523 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2524 | spec_width, maxendcol, | |
2525 | Vglobal_mode_string); | |
2526 | else if (c != 0) | |
2527 | hpos = display_string (w, vpos, | |
2528 | decode_mode_spec (w, c, | |
2529 | maxendcol - hpos), | |
90adcf20 | 2530 | -1, |
a2889657 JB |
2531 | hpos, 0, spec_width, maxendcol); |
2532 | } | |
2533 | } | |
2534 | } | |
2535 | break; | |
2536 | ||
2537 | case Lisp_Symbol: | |
2538 | /* A symbol: process the value of the symbol recursively | |
2539 | as if it appeared here directly. Avoid error if symbol void. | |
2540 | Special case: if value of symbol is a string, output the string | |
2541 | literally. */ | |
2542 | { | |
2543 | register Lisp_Object tem; | |
2544 | tem = Fboundp (elt); | |
265a9e55 | 2545 | if (!NILP (tem)) |
a2889657 JB |
2546 | { |
2547 | tem = Fsymbol_value (elt); | |
2548 | /* If value is a string, output that string literally: | |
2549 | don't check for % within it. */ | |
2550 | if (XTYPE (tem) == Lisp_String) | |
2551 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
90adcf20 | 2552 | XSTRING (tem)->size, |
a2889657 JB |
2553 | hpos, 0, minendcol, maxendcol); |
2554 | /* Give up right away for nil or t. */ | |
2555 | else if (!EQ (tem, elt)) | |
2556 | { elt = tem; goto tail_recurse; } | |
2557 | } | |
2558 | } | |
2559 | break; | |
2560 | ||
2561 | case Lisp_Cons: | |
2562 | { | |
2563 | register Lisp_Object car, tem; | |
2564 | ||
2565 | /* A cons cell: three distinct cases. | |
2566 | If first element is a string or a cons, process all the elements | |
2567 | and effectively concatenate them. | |
2568 | If first element is a negative number, truncate displaying cdr to | |
2569 | at most that many characters. If positive, pad (with spaces) | |
2570 | to at least that many characters. | |
2571 | If first element is a symbol, process the cadr or caddr recursively | |
2572 | according to whether the symbol's value is non-nil or nil. */ | |
2573 | car = XCONS (elt)->car; | |
2574 | if (XTYPE (car) == Lisp_Symbol) | |
2575 | { | |
2576 | tem = Fboundp (car); | |
2577 | elt = XCONS (elt)->cdr; | |
2578 | if (XTYPE (elt) != Lisp_Cons) | |
2579 | goto invalid; | |
2580 | /* elt is now the cdr, and we know it is a cons cell. | |
2581 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 2582 | if (!NILP (tem)) |
a2889657 JB |
2583 | { |
2584 | tem = Fsymbol_value (car); | |
265a9e55 | 2585 | if (!NILP (tem)) |
a2889657 JB |
2586 | { elt = XCONS (elt)->car; goto tail_recurse; } |
2587 | } | |
2588 | /* Symbol's value is nil (or symbol is unbound) | |
2589 | Get the cddr of the original list | |
2590 | and if possible find the caddr and use that. */ | |
2591 | elt = XCONS (elt)->cdr; | |
265a9e55 | 2592 | if (NILP (elt)) |
a2889657 JB |
2593 | break; |
2594 | else if (XTYPE (elt) != Lisp_Cons) | |
2595 | goto invalid; | |
2596 | elt = XCONS (elt)->car; | |
2597 | goto tail_recurse; | |
2598 | } | |
2599 | else if (XTYPE (car) == Lisp_Int) | |
2600 | { | |
2601 | register int lim = XINT (car); | |
2602 | elt = XCONS (elt)->cdr; | |
2603 | if (lim < 0) | |
2604 | /* Negative int means reduce maximum width. | |
2605 | DO NOT change MINENDCOL here! | |
2606 | (20 -10 . foo) should truncate foo to 10 col | |
2607 | and then pad to 20. */ | |
2608 | maxendcol = min (maxendcol, hpos - lim); | |
2609 | else if (lim > 0) | |
2610 | { | |
2611 | /* Padding specified. Don't let it be more than | |
2612 | current maximum. */ | |
2613 | lim += hpos; | |
2614 | if (lim > maxendcol) | |
2615 | lim = maxendcol; | |
2616 | /* If that's more padding than already wanted, queue it. | |
2617 | But don't reduce padding already specified even if | |
2618 | that is beyond the current truncation point. */ | |
2619 | if (lim > minendcol) | |
2620 | minendcol = lim; | |
2621 | } | |
2622 | goto tail_recurse; | |
2623 | } | |
2624 | else if (XTYPE (car) == Lisp_String || XTYPE (car) == Lisp_Cons) | |
2625 | { | |
2626 | register int limit = 50; | |
2627 | /* LIMIT is to protect against circular lists. */ | |
2628 | while (XTYPE (elt) == Lisp_Cons && --limit > 0 | |
2629 | && hpos < maxendcol) | |
2630 | { | |
2631 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2632 | hpos, maxendcol, | |
2633 | XCONS (elt)->car); | |
2634 | elt = XCONS (elt)->cdr; | |
2635 | } | |
2636 | } | |
2637 | } | |
2638 | break; | |
2639 | ||
2640 | default: | |
2641 | invalid: | |
90adcf20 | 2642 | return (display_string (w, vpos, "*invalid*", -1, hpos, 0, |
a2889657 JB |
2643 | minendcol, maxendcol)); |
2644 | } | |
2645 | ||
2646 | end: | |
2647 | if (minendcol > hpos) | |
90adcf20 | 2648 | hpos = display_string (w, vpos, "", 0, hpos, 0, minendcol, -1); |
a2889657 JB |
2649 | return hpos; |
2650 | } | |
2651 | \f | |
2652 | /* Return a string for the output of a mode line %-spec for window W, | |
2653 | generated by character C and width MAXWIDTH. */ | |
2654 | ||
11e82b76 JB |
2655 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
2656 | ||
a2889657 JB |
2657 | static char * |
2658 | decode_mode_spec (w, c, maxwidth) | |
2659 | struct window *w; | |
2660 | register char c; | |
2661 | register int maxwidth; | |
2662 | { | |
2663 | Lisp_Object obj = Qnil; | |
44fa5b1e JB |
2664 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2665 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
a2889657 | 2666 | |
44fa5b1e JB |
2667 | if (maxwidth > FRAME_WIDTH (f)) |
2668 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
2669 | |
2670 | switch (c) | |
2671 | { | |
2672 | case 'b': | |
2673 | obj = current_buffer->name; | |
2674 | #if 0 | |
2675 | if (maxwidth >= 3 && XSTRING (obj)->size > maxwidth) | |
2676 | { | |
2677 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
2678 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
2679 | decode_mode_spec_buf[maxwidth] = '\0'; | |
2680 | return decode_mode_spec_buf; | |
2681 | } | |
2682 | #endif | |
2683 | break; | |
2684 | ||
2685 | case 'f': | |
2686 | obj = current_buffer->filename; | |
2687 | #if 0 | |
265a9e55 | 2688 | if (NILP (obj)) |
a2889657 JB |
2689 | return "[none]"; |
2690 | else if (XTYPE (obj) == Lisp_String && XSTRING (obj)->size > maxwidth) | |
2691 | { | |
2692 | bcopy ("...", decode_mode_spec_buf, 3); | |
2693 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size - maxwidth + 3, | |
2694 | decode_mode_spec_buf + 3, maxwidth - 3); | |
2695 | return decode_mode_spec_buf; | |
2696 | } | |
2697 | #endif | |
2698 | break; | |
2699 | ||
aa6d10fa RS |
2700 | case 'l': |
2701 | { | |
2702 | int startpos = marker_position (w->start); | |
2703 | int line, linepos, topline; | |
2704 | int nlines, junk; | |
2705 | Lisp_Object tem; | |
2706 | int height = XFASTINT (w->height); | |
2707 | ||
2708 | /* If we decided that this buffer isn't suitable for line numbers, | |
2709 | don't forget that too fast. */ | |
2710 | if (EQ (w->base_line_pos, w->buffer)) | |
2711 | return "??"; | |
2712 | ||
2713 | /* If the buffer is very big, don't waste time. */ | |
2714 | if (ZV - BEGV > line_number_display_limit) | |
2715 | { | |
2716 | w->base_line_pos = Qnil; | |
2717 | w->base_line_number = Qnil; | |
2718 | return "??"; | |
2719 | } | |
2720 | ||
2721 | if (!NILP (w->base_line_number) | |
2722 | && !NILP (w->base_line_pos) | |
2723 | && XFASTINT (w->base_line_pos) <= marker_position (w->start)) | |
2724 | { | |
2725 | line = XFASTINT (w->base_line_number); | |
2726 | linepos = XFASTINT (w->base_line_pos); | |
2727 | } | |
2728 | else | |
2729 | { | |
2730 | line = 1; | |
2731 | linepos = BEGV; | |
2732 | } | |
2733 | ||
2734 | /* Count lines from base line to window start position. */ | |
2735 | nlines = display_count_lines (linepos, startpos, startpos, &junk); | |
2736 | ||
2737 | topline = nlines + line; | |
2738 | ||
2739 | /* Determine a new base line, if the old one is too close | |
2740 | or too far away, or if we did not have one. | |
2741 | "Too close" means it's plausible a scroll-down would | |
2742 | go back past it. */ | |
2743 | if (startpos == BEGV) | |
2744 | { | |
2745 | XFASTINT (w->base_line_number) = topline; | |
2746 | XFASTINT (w->base_line_pos) = BEGV; | |
2747 | } | |
2748 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
2749 | || linepos == BEGV) | |
2750 | { | |
2751 | int limit = BEGV; | |
2752 | int position; | |
2753 | int distance = (height * 2 + 30) * 200; | |
2754 | ||
2755 | if (startpos - distance > limit) | |
2756 | limit = startpos - distance; | |
2757 | ||
2758 | nlines = display_count_lines (startpos, limit, | |
2759 | -(height * 2 + 30), | |
2760 | &position); | |
2761 | /* If we couldn't find the lines we wanted within | |
2762 | 200 chars per line, | |
2763 | give up on line numbers for this window. */ | |
2764 | if (position == startpos - distance) | |
2765 | { | |
2766 | w->base_line_pos = w->buffer; | |
2767 | w->base_line_number = Qnil; | |
2768 | return "??"; | |
2769 | } | |
2770 | ||
2771 | XFASTINT (w->base_line_number) = topline - nlines; | |
2772 | XFASTINT (w->base_line_pos) = position; | |
2773 | } | |
2774 | ||
2775 | /* Now count lines from the start pos to point. */ | |
2776 | nlines = display_count_lines (startpos, PT, PT, &junk); | |
2777 | ||
2778 | /* Record that we did display the line number. */ | |
2779 | line_number_displayed = 1; | |
2780 | ||
2781 | /* Make the string to show. */ | |
2782 | sprintf (decode_mode_spec_buf, "%d", topline + nlines); | |
2783 | return decode_mode_spec_buf; | |
2784 | } | |
2785 | break; | |
2786 | ||
a2889657 JB |
2787 | case 'm': |
2788 | obj = current_buffer->mode_name; | |
2789 | break; | |
2790 | ||
2791 | case 'n': | |
2792 | if (BEGV > BEG || ZV < Z) | |
2793 | return " Narrow"; | |
2794 | break; | |
2795 | ||
2796 | case '*': | |
265a9e55 | 2797 | if (!NILP (current_buffer->read_only)) |
a2889657 JB |
2798 | return "%"; |
2799 | if (MODIFF > current_buffer->save_modified) | |
2800 | return "*"; | |
2801 | return "-"; | |
2802 | ||
2803 | case 's': | |
2804 | /* status of process */ | |
a2889657 | 2805 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
265a9e55 | 2806 | if (NILP (obj)) |
a2889657 JB |
2807 | return "no process"; |
2808 | obj = Fsymbol_name (Fprocess_status (obj)); | |
2809 | break; | |
a2889657 JB |
2810 | |
2811 | case 'p': | |
2812 | { | |
2813 | int pos = marker_position (w->start); | |
2814 | int total = ZV - BEGV; | |
2815 | ||
2816 | if (XFASTINT (w->window_end_pos) <= Z - ZV) | |
2817 | { | |
2818 | if (pos <= BEGV) | |
2819 | return "All"; | |
2820 | else | |
2821 | return "Bottom"; | |
2822 | } | |
2823 | else if (pos <= BEGV) | |
2824 | return "Top"; | |
2825 | else | |
2826 | { | |
2827 | total = ((pos - BEGV) * 100 + total - 1) / total; | |
2828 | /* We can't normally display a 3-digit number, | |
2829 | so get us a 2-digit number that is close. */ | |
2830 | if (total == 100) | |
2831 | total = 99; | |
2832 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2833 | return decode_mode_spec_buf; | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | case '%': | |
2838 | return "%"; | |
2839 | ||
2840 | case '[': | |
2841 | { | |
2842 | int i; | |
2843 | char *p; | |
2844 | ||
2845 | if (command_loop_level > 5) | |
2846 | return "[[[... "; | |
2847 | p = decode_mode_spec_buf; | |
2848 | for (i = 0; i < command_loop_level; i++) | |
2849 | *p++ = '['; | |
2850 | *p = 0; | |
2851 | return decode_mode_spec_buf; | |
2852 | } | |
2853 | ||
2854 | case ']': | |
2855 | { | |
2856 | int i; | |
2857 | char *p; | |
2858 | ||
2859 | if (command_loop_level > 5) | |
2860 | return " ...]]]"; | |
2861 | p = decode_mode_spec_buf; | |
2862 | for (i = 0; i < command_loop_level; i++) | |
2863 | *p++ = ']'; | |
2864 | *p = 0; | |
2865 | return decode_mode_spec_buf; | |
2866 | } | |
2867 | ||
2868 | case '-': | |
2869 | { | |
a2889657 JB |
2870 | register char *p; |
2871 | register int i; | |
2872 | ||
2873 | if (maxwidth < sizeof (lots_of_dashes)) | |
2874 | return lots_of_dashes; | |
2875 | else | |
2876 | { | |
2877 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
2878 | *p++ = '-'; | |
2879 | *p = '\0'; | |
2880 | } | |
2881 | return decode_mode_spec_buf; | |
2882 | } | |
2883 | } | |
2884 | ||
2885 | if (XTYPE (obj) == Lisp_String) | |
2886 | return (char *) XSTRING (obj)->data; | |
2887 | else | |
2888 | return ""; | |
2889 | } | |
aa6d10fa RS |
2890 | |
2891 | /* Count up to N lines starting from FROM. | |
2892 | But don't go beyond LIMIT. | |
2893 | Return the number of lines thus found (always positive). | |
2894 | Store the position after what was found into *POS_PTR. */ | |
2895 | ||
2896 | static int | |
2897 | display_count_lines (from, limit, n, pos_ptr) | |
2898 | int from, limit, n; | |
2899 | int *pos_ptr; | |
2900 | { | |
2901 | int oldbegv = BEGV; | |
2902 | int oldzv = ZV; | |
2903 | int shortage = 0; | |
2904 | ||
2905 | if (limit < from) | |
2906 | BEGV = limit; | |
2907 | else | |
2908 | ZV = limit; | |
2909 | ||
2910 | *pos_ptr = scan_buffer ('\n', from, n, &shortage); | |
2911 | ||
2912 | ZV = oldzv; | |
2913 | BEGV = oldbegv; | |
2914 | ||
2915 | if (n < 0) | |
2916 | /* When scanning backwards, scan_buffer stops *after* the last newline | |
2917 | it finds, but does count it. Compensate for that. */ | |
2918 | return - n - shortage - (*pos_ptr != limit); | |
2919 | return n - shortage; | |
2920 | } | |
a2889657 JB |
2921 | \f |
2922 | /* Display STRING on one line of window W, starting at HPOS. | |
2923 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 2924 | If VPOS == -1, display it as the current frame's title. |
90adcf20 | 2925 | LENGTH is the length of STRING, or -1 meaning STRING is null-terminated. |
a2889657 JB |
2926 | |
2927 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
2928 | ||
2929 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
2930 | MAXCOL is the last column ok to end at. Truncate here. | |
2931 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 2932 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
2933 | The right edge of W is an implicit maximum. |
2934 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
2935 | ||
2936 | Returns ending hpos */ | |
2937 | ||
2938 | static int | |
90adcf20 | 2939 | display_string (w, vpos, string, length, hpos, truncate, mincol, maxcol) |
a2889657 JB |
2940 | struct window *w; |
2941 | unsigned char *string; | |
90adcf20 | 2942 | int length; |
a2889657 JB |
2943 | int vpos, hpos; |
2944 | GLYPH truncate; | |
2945 | int mincol, maxcol; | |
2946 | { | |
2947 | register int c; | |
2948 | register GLYPH *p1; | |
2949 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 2950 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
2951 | register GLYPH *start; |
2952 | register GLYPH *end; | |
b1d1124b JB |
2953 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2954 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
2955 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
2956 | int window_width = XFASTINT (w->width); | |
2957 | ||
2958 | /* Use the standard display table, not the window's display table. | |
2959 | We don't want the mode line in rot13. */ | |
2960 | register struct Lisp_Vector *dp = 0; | |
2961 | ||
2962 | if (XTYPE (Vstandard_display_table) == Lisp_Vector | |
2963 | && XVECTOR (Vstandard_display_table)->size == DISP_TABLE_SIZE) | |
2964 | dp = XVECTOR (Vstandard_display_table); | |
2965 | ||
54ff581a | 2966 | if (tab_width <= 0 || tab_width > 1000) tab_width = 8; |
a2889657 JB |
2967 | |
2968 | p1 = p1start; | |
2969 | start = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
2970 | end = start + window_width - (truncate != 0); | |
2971 | ||
b1d1124b JB |
2972 | if ((window_width + XFASTINT (w->left)) != FRAME_WIDTH (f)) |
2973 | { | |
88f22aff | 2974 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
b1d1124b JB |
2975 | { |
2976 | int i; | |
2977 | ||
88f22aff | 2978 | for (i = 0; i < VERTICAL_SCROLL_BAR_WIDTH; i++) |
b1d1124b JB |
2979 | *end-- = ' '; |
2980 | } | |
2981 | else | |
2982 | *end-- = '|'; | |
2983 | } | |
a2889657 JB |
2984 | |
2985 | if (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol) | |
2986 | end = desired_glyphs->glyphs[vpos] + maxcol; | |
2987 | if (maxcol >= 0 && mincol > maxcol) | |
2988 | mincol = maxcol; | |
2989 | ||
2990 | while (p1 < end) | |
2991 | { | |
90adcf20 RS |
2992 | if (length == 0) |
2993 | break; | |
a2889657 | 2994 | c = *string++; |
90adcf20 RS |
2995 | /* Specified length. */ |
2996 | if (length >= 0) | |
2997 | length--; | |
2998 | /* Unspecified length (null-terminated string). */ | |
2999 | else if (c == 0) | |
3000 | break; | |
3001 | ||
a2889657 | 3002 | if (c >= 040 && c < 0177 |
c581d710 | 3003 | && (dp == 0 || XTYPE (DISP_CHAR_VECTOR (dp, c)) != Lisp_Vector)) |
a2889657 JB |
3004 | { |
3005 | if (p1 >= start) | |
3006 | *p1 = c; | |
3007 | p1++; | |
3008 | } | |
3009 | else if (c == '\t') | |
3010 | { | |
3011 | do | |
3012 | { | |
3013 | if (p1 >= start && p1 < end) | |
3014 | *p1 = SPACEGLYPH; | |
3015 | p1++; | |
3016 | } | |
3017 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
3018 | } | |
c581d710 | 3019 | else if (dp != 0 && XTYPE (DISP_CHAR_VECTOR (dp, c)) == Lisp_Vector) |
1c2250c2 | 3020 | p1 = copy_rope (p1, start, DISP_CHAR_VECTOR (dp, c), 0); |
ded34426 | 3021 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
3022 | { |
3023 | if (p1 >= start) | |
3024 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
3025 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
3026 | p1++; | |
6e8290aa | 3027 | if (p1 >= start && p1 < end) |
a2889657 JB |
3028 | *p1 = c ^ 0100; |
3029 | p1++; | |
3030 | } | |
3031 | else | |
3032 | { | |
3033 | if (p1 >= start) | |
3034 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
3035 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
3036 | p1++; | |
6e8290aa | 3037 | if (p1 >= start && p1 < end) |
a2889657 JB |
3038 | *p1 = (c >> 6) + '0'; |
3039 | p1++; | |
6e8290aa | 3040 | if (p1 >= start && p1 < end) |
a2889657 JB |
3041 | *p1 = (7 & (c >> 3)) + '0'; |
3042 | p1++; | |
6e8290aa | 3043 | if (p1 >= start && p1 < end) |
a2889657 JB |
3044 | *p1 = (7 & c) + '0'; |
3045 | p1++; | |
3046 | } | |
3047 | } | |
3048 | ||
90adcf20 | 3049 | if (c && length > 0) |
a2889657 JB |
3050 | { |
3051 | p1 = end; | |
3052 | if (truncate) *p1++ = truncate; | |
3053 | } | |
3054 | else if (mincol >= 0) | |
3055 | { | |
3056 | end = desired_glyphs->glyphs[vpos] + mincol; | |
3057 | while (p1 < end) | |
3058 | *p1++ = SPACEGLYPH; | |
3059 | } | |
3060 | ||
3061 | { | |
3062 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
3063 | ||
3064 | if (len > desired_glyphs->used[vpos]) | |
3065 | desired_glyphs->used[vpos] = len; | |
3066 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
3067 | ||
3068 | return len; | |
3069 | } | |
3070 | } | |
3071 | \f | |
3072 | void | |
3073 | syms_of_xdisp () | |
3074 | { | |
3075 | staticpro (&last_arrow_position); | |
3076 | staticpro (&last_arrow_string); | |
3077 | last_arrow_position = Qnil; | |
3078 | last_arrow_string = Qnil; | |
3079 | ||
3080 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 3081 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
3082 | Vglobal_mode_string = Qnil; |
3083 | ||
3084 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
3085 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
3086 | This must be the beginning of a line in order to work.\n\ | |
3087 | See also `overlay-arrow-string'."); | |
3088 | Voverlay_arrow_position = Qnil; | |
3089 | ||
3090 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
3091 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
3092 | Voverlay_arrow_string = Qnil; | |
3093 | ||
3094 | DEFVAR_INT ("scroll-step", &scroll_step, | |
3095 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
3096 | If that fails to bring point back on frame, point is centered instead.\n\ |
3097 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 JB |
3098 | |
3099 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); | |
3100 | ||
3101 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
3102 | &truncate_partial_width_windows, | |
44fa5b1e | 3103 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
3104 | truncate_partial_width_windows = 1; |
3105 | ||
3106 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
3107 | "*Non-nil means use inverse video for the mode line."); | |
3108 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
3109 | |
3110 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
3111 | "*Maximum buffer size for which line number should be displayed."); | |
3112 | line_number_display_limit = 1000000; | |
fba9ce76 RS |
3113 | |
3114 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
3115 | "*Non-nil means highlight region even in nonselected windows."); | |
3116 | highlight_nonselected_windows = 1; | |
a2889657 JB |
3117 | } |
3118 | ||
3119 | /* initialize the window system */ | |
3120 | init_xdisp () | |
3121 | { | |
3122 | Lisp_Object root_window; | |
3123 | #ifndef COMPILER_REGISTER_BUG | |
3124 | register | |
3125 | #endif /* COMPILER_REGISTER_BUG */ | |
3126 | struct window *mini_w; | |
3127 | ||
3128 | this_line_bufpos = 0; | |
3129 | ||
3130 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 3131 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
3132 | |
3133 | echo_area_glyphs = 0; | |
3134 | previous_echo_glyphs = 0; | |
3135 | ||
3136 | if (!noninteractive) | |
3137 | { | |
44fa5b1e | 3138 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
a2889657 | 3139 | XFASTINT (XWINDOW (root_window)->top) = 0; |
44fa5b1e JB |
3140 | set_window_height (root_window, FRAME_HEIGHT (f) - 1, 0); |
3141 | XFASTINT (mini_w->top) = FRAME_HEIGHT (f) - 1; | |
a2889657 JB |
3142 | set_window_height (minibuf_window, 1, 0); |
3143 | ||
44fa5b1e JB |
3144 | XFASTINT (XWINDOW (root_window)->width) = FRAME_WIDTH (f); |
3145 | XFASTINT (mini_w->width) = FRAME_WIDTH (f); | |
a2889657 JB |
3146 | } |
3147 | } |