Commit | Line | Data |
---|---|---|
a2889657 | 1 | /* Display generation from window structure and buffer text. |
b1d1124b | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993 Free Software Foundation, Inc. |
a2889657 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 8 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include <stdio.h> | |
23 | /*#include <ctype.h>*/ | |
24 | #undef NULL | |
25 | #include "lisp.h" | |
44fa5b1e | 26 | #include "frame.h" |
a2889657 JB |
27 | #include "window.h" |
28 | #include "termchar.h" | |
29 | #include "dispextern.h" | |
30 | #include "buffer.h" | |
31 | #include "indent.h" | |
32 | #include "commands.h" | |
33 | #include "macros.h" | |
34 | #include "disptab.h" | |
30c566e4 | 35 | #include "termhooks.h" |
a2889657 JB |
36 | |
37 | extern int interrupt_input; | |
38 | extern int command_loop_level; | |
39 | ||
40 | /* Nonzero means print newline before next minibuffer message. */ | |
41 | ||
42 | int noninteractive_need_newline; | |
43 | ||
44 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
45 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
46 | ||
47 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
48 | entirely or partially on the current frame line. |
49 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
50 | static int this_line_bufpos; |
51 | ||
52 | /* Number of characters past the end of this line, | |
53 | including the terminating newline */ | |
54 | static int this_line_endpos; | |
55 | ||
44fa5b1e | 56 | /* The vertical position of this frame line. */ |
a2889657 JB |
57 | static int this_line_vpos; |
58 | ||
44fa5b1e | 59 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
60 | Usually zero, but negative if first character really began |
61 | on previous line */ | |
62 | static int this_line_start_hpos; | |
63 | ||
64 | /* Buffer that this_line variables are describing. */ | |
65 | static struct buffer *this_line_buffer; | |
66 | ||
67 | /* Set by try_window_id to the vpos of first of any lines | |
44fa5b1e | 68 | scrolled on to the bottom of the frame. These lines should |
a2889657 JB |
69 | not be included in any general scroll computation. */ |
70 | static int scroll_bottom_vpos; | |
71 | ||
72 | /* Value of echo_area_glyphs when it was last acted on. | |
44fa5b1e | 73 | If this is nonzero, there is a message on the frame |
a2889657 JB |
74 | in the minibuffer and it should be erased as soon |
75 | as it is no longer requested to appear. */ | |
76 | char *previous_echo_glyphs; | |
77 | ||
44fa5b1e | 78 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
79 | int truncate_partial_width_windows; |
80 | ||
81 | Lisp_Object Vglobal_mode_string; | |
82 | ||
83 | /* Marker for where to display an arrow on top of the buffer text. */ | |
84 | Lisp_Object Voverlay_arrow_position; | |
85 | ||
86 | /* String to display for the arrow. */ | |
87 | Lisp_Object Voverlay_arrow_string; | |
88 | ||
89 | /* Values of those variables at last redisplay. */ | |
ded34426 | 90 | static Lisp_Object last_arrow_position, last_arrow_string; |
a2889657 JB |
91 | |
92 | /* Nonzero if overlay arrow has been displayed once in this window. */ | |
93 | static int overlay_arrow_seen; | |
94 | ||
44fa5b1e | 95 | /* If cursor motion alone moves point off frame, |
a2889657 JB |
96 | Try scrolling this many lines up or down if that will bring it back. */ |
97 | int scroll_step; | |
98 | ||
99 | /* Nonzero if try_window_id has made blank lines at window bottom | |
100 | since the last redisplay that paused */ | |
101 | static int blank_end_of_window; | |
102 | ||
103 | /* Number of windows showing the buffer of the selected window. | |
104 | keyboard.c refers to this. */ | |
105 | int buffer_shared; | |
106 | ||
44fa5b1e | 107 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
108 | whether the window is selected or not. |
109 | Set one to -1 first to determine whether point was found afterwards. */ | |
110 | ||
111 | static int cursor_vpos; | |
112 | static int cursor_hpos; | |
113 | ||
114 | int debug_end_pos; | |
115 | ||
116 | /* Nonzero means display mode line highlighted */ | |
117 | int mode_line_inverse_video; | |
118 | ||
119 | static void echo_area_display (); | |
120 | void mark_window_display_accurate (); | |
121 | static void redisplay_windows (); | |
122 | static void redisplay_window (); | |
123 | static void try_window (); | |
124 | static int try_window_id (); | |
125 | static struct position *display_text_line (); | |
126 | static void display_mode_line (); | |
127 | static int display_mode_element (); | |
128 | static char *fmodetrunc (); | |
129 | static char *decode_mode_spec (); | |
130 | static int display_string (); | |
131 | ||
132 | /* Prompt to display in front of the minibuffer contents */ | |
133 | char *minibuf_prompt; | |
134 | ||
135 | /* Width in columns of current minibuffer prompt. */ | |
136 | int minibuf_prompt_width; | |
137 | ||
138 | /* Message to display instead of minibuffer contents | |
139 | This is what the functions error and message make, | |
140 | and command echoing uses it as well. | |
141 | It overrides the minibuf_prompt as well as the buffer. */ | |
142 | char *echo_area_glyphs; | |
143 | ||
144 | /* true iff we should redraw the mode lines on the next redisplay */ | |
145 | int update_mode_lines; | |
146 | ||
147 | /* Smallest number of characters before the gap | |
148 | at any time since last redisplay that finished. | |
149 | Valid for current buffer when try_window_id can be called. */ | |
150 | int beg_unchanged; | |
151 | ||
152 | /* Smallest number of characters after the gap | |
153 | at any time since last redisplay that finished. | |
154 | Valid for current buffer when try_window_id can be called. */ | |
155 | int end_unchanged; | |
156 | ||
157 | /* MODIFF as of last redisplay that finished; | |
158 | if it matches MODIFF, beg_unchanged and end_unchanged | |
159 | contain no useful information */ | |
160 | int unchanged_modified; | |
161 | ||
162 | /* Nonzero if head_clip or tail_clip of current buffer has changed | |
163 | since last redisplay that finished */ | |
164 | int clip_changed; | |
165 | ||
166 | /* Nonzero if window sizes or contents have changed | |
167 | since last redisplay that finished */ | |
168 | int windows_or_buffers_changed; | |
169 | ||
170 | \f | |
ded34426 JB |
171 | /* Specify m, a string, as a message in the minibuf. If m is 0, clear out |
172 | any existing message, and let the minibuffer text show through. */ | |
173 | void | |
174 | message1 (m) | |
175 | char *m; | |
176 | { | |
177 | if (noninteractive) | |
178 | { | |
179 | if (noninteractive_need_newline) | |
180 | putc ('\n', stderr); | |
181 | noninteractive_need_newline = 0; | |
182 | fprintf (stderr, "%s\n", m); | |
183 | fflush (stderr); | |
184 | } | |
185 | /* A null message buffer means that the frame hasn't really been | |
186 | initialized yet. Error messages get reported properly by | |
187 | cmd_error, so this must be just an informative message; toss it. */ | |
188 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
189 | { | |
190 | #ifdef MULTI_FRAME | |
191 | Lisp_Object minibuf_frame; | |
192 | ||
193 | choose_minibuf_frame (); | |
194 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); | |
d724d989 | 195 | FRAME_SAMPLE_VISIBILITY (XFRAME (minibuf_frame)); |
ded34426 JB |
196 | if (FRAME_VISIBLE_P (selected_frame) |
197 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
198 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
199 | #endif | |
200 | ||
201 | if (m) | |
202 | echo_area_glyphs = m; | |
203 | else | |
204 | echo_area_glyphs = previous_echo_glyphs = 0; | |
205 | ||
206 | do_pending_window_change (); | |
207 | echo_area_display (); | |
208 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); | |
209 | do_pending_window_change (); | |
210 | } | |
211 | } | |
212 | ||
44fa5b1e | 213 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
214 | zero if being used by message. */ |
215 | int message_buf_print; | |
216 | ||
81d478f3 JB |
217 | /* Dump an informative message to the minibuf. If m is 0, clear out |
218 | any existing message, and let the minibuffer text show through. */ | |
a2889657 | 219 | /* VARARGS 1 */ |
a2889657 JB |
220 | void |
221 | message (m, a1, a2, a3) | |
222 | char *m; | |
223 | { | |
224 | if (noninteractive) | |
225 | { | |
81d478f3 JB |
226 | if (m) |
227 | { | |
228 | if (noninteractive_need_newline) | |
229 | putc ('\n', stderr); | |
230 | noninteractive_need_newline = 0; | |
231 | fprintf (stderr, m, a1, a2, a3); | |
232 | fprintf (stderr, "\n"); | |
233 | fflush (stderr); | |
234 | } | |
a2889657 | 235 | } |
44fa5b1e | 236 | /* A null message buffer means that the frame hasn't really been |
8de2d90b JB |
237 | initialized yet. Error messages get reported properly by |
238 | cmd_error, so this must be just an informative message; toss it. */ | |
44fa5b1e | 239 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) |
a2889657 | 240 | { |
81d478f3 JB |
241 | if (m) |
242 | { | |
243 | { | |
a2889657 | 244 | #ifdef NO_ARG_ARRAY |
81d478f3 JB |
245 | int a[3]; |
246 | a[0] = a1; | |
247 | a[1] = a2; | |
248 | a[2] = a3; | |
a2889657 | 249 | |
81d478f3 JB |
250 | doprnt (FRAME_MESSAGE_BUF (selected_frame), |
251 | FRAME_WIDTH (selected_frame), m, 0, 3, a); | |
a2889657 | 252 | #else |
81d478f3 JB |
253 | doprnt (FRAME_MESSAGE_BUF (selected_frame), |
254 | FRAME_WIDTH (selected_frame), m, 0, 3, &a1); | |
6e8290aa | 255 | #endif /* NO_ARG_ARRAY */ |
81d478f3 | 256 | } |
a2889657 | 257 | |
ded34426 | 258 | message1 (FRAME_MESSAGE_BUF (selected_frame)); |
81d478f3 JB |
259 | } |
260 | else | |
ded34426 | 261 | message1 (0); |
9c74a0dd JB |
262 | |
263 | /* Print should start at the beginning of the message | |
264 | buffer next time. */ | |
265 | message_buf_print = 0; | |
a2889657 JB |
266 | } |
267 | } | |
268 | ||
269 | static void | |
270 | echo_area_display () | |
271 | { | |
272 | register int vpos; | |
44fa5b1e | 273 | FRAME_PTR f; |
a2889657 | 274 | |
44fa5b1e JB |
275 | #ifdef MULTI_FRAME |
276 | choose_minibuf_frame (); | |
b1d1124b JB |
277 | #endif |
278 | ||
44fa5b1e | 279 | f = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); |
a2889657 | 280 | |
44fa5b1e | 281 | if (! FRAME_VISIBLE_P (f)) |
a2889657 | 282 | return; |
a2889657 | 283 | |
44fa5b1e | 284 | if (frame_garbaged) |
a2889657 JB |
285 | { |
286 | Fredraw_display (); | |
44fa5b1e | 287 | frame_garbaged = 0; |
a2889657 JB |
288 | } |
289 | ||
290 | if (echo_area_glyphs || minibuf_level == 0) | |
291 | { | |
292 | vpos = XFASTINT (XWINDOW (minibuf_window)->top); | |
44fa5b1e | 293 | get_display_line (f, vpos, 0); |
a2889657 JB |
294 | display_string (XWINDOW (minibuf_window), vpos, |
295 | echo_area_glyphs ? echo_area_glyphs : "", | |
44fa5b1e | 296 | 0, 0, 0, FRAME_WIDTH (f)); |
a2889657 JB |
297 | |
298 | /* If desired cursor location is on this line, put it at end of text */ | |
44fa5b1e JB |
299 | if (FRAME_CURSOR_Y (f) == vpos) |
300 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
daa37602 JB |
301 | |
302 | /* Fill the rest of the minibuffer window with blank lines. */ | |
303 | { | |
304 | int i; | |
305 | ||
306 | for (i = vpos + 1; i < vpos + XWINDOW (minibuf_window)->height; i++) | |
307 | { | |
44fa5b1e | 308 | get_display_line (f, i, 0); |
daa37602 | 309 | display_string (XWINDOW (minibuf_window), vpos, |
44fa5b1e | 310 | "", 0, 0, 0, FRAME_WIDTH (f)); |
daa37602 JB |
311 | } |
312 | } | |
a2889657 JB |
313 | } |
314 | else if (!EQ (minibuf_window, selected_window)) | |
315 | windows_or_buffers_changed++; | |
316 | ||
317 | if (EQ (minibuf_window, selected_window)) | |
318 | this_line_bufpos = 0; | |
319 | ||
320 | previous_echo_glyphs = echo_area_glyphs; | |
321 | } | |
322 | \f | |
44fa5b1e | 323 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
324 | This is the main external entry point for redisplay. |
325 | ||
326 | If the last redisplay displayed an echo area message and that | |
327 | message is no longer requested, we clear the echo area | |
328 | or bring back the minibuffer if that is in use. | |
329 | ||
330 | Everyone would like to have a hook here to call eval, | |
331 | but that cannot be done safely without a lot of changes elsewhere. | |
332 | This can be called from signal handlers; with alarms set up; | |
333 | or with synchronous processes running. | |
334 | See the function `echo' in keyboard.c. | |
335 | See Fcall_process; if you called it from here, it could be | |
336 | entered recursively. */ | |
337 | ||
338 | void | |
339 | redisplay () | |
340 | { | |
341 | register struct window *w = XWINDOW (selected_window); | |
342 | register int pause; | |
343 | int must_finish = 0; | |
344 | int all_windows; | |
345 | register int tlbufpos, tlendpos; | |
346 | struct position pos; | |
347 | extern int input_pending; | |
348 | ||
349 | if (noninteractive) | |
350 | return; | |
351 | ||
d724d989 JB |
352 | /* Set the visible flags for all frames. |
353 | Do this before checking for resized or garbaged frames; they want | |
354 | to know if their frames are visible. | |
355 | See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */ | |
356 | { | |
357 | Lisp_Object tail; | |
358 | FRAME_PTR f; | |
359 | ||
360 | FOR_EACH_FRAME (tail, f) | |
361 | FRAME_SAMPLE_VISIBILITY (f); | |
362 | } | |
363 | ||
44fa5b1e | 364 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
365 | do_pending_window_change (); |
366 | ||
44fa5b1e | 367 | if (frame_garbaged) |
a2889657 JB |
368 | { |
369 | Fredraw_display (); | |
44fa5b1e | 370 | frame_garbaged = 0; |
a2889657 JB |
371 | } |
372 | ||
6e8290aa | 373 | /* Normally the message* functions will have already displayed and |
44fa5b1e | 374 | updated the echo area, but the frame may have been trashed, or |
6e8290aa JB |
375 | the update may have been preempted, so display the echo area |
376 | again here. */ | |
a2889657 JB |
377 | if (echo_area_glyphs || previous_echo_glyphs) |
378 | { | |
379 | echo_area_display (); | |
380 | must_finish = 1; | |
381 | } | |
382 | ||
383 | if (clip_changed || windows_or_buffers_changed) | |
384 | update_mode_lines++; | |
385 | ||
386 | /* Detect case that we need to write a star in the mode line. */ | |
387 | if (XFASTINT (w->last_modified) < MODIFF | |
388 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
389 | { | |
390 | w->update_mode_line = Qt; | |
391 | if (buffer_shared > 1) | |
392 | update_mode_lines++; | |
393 | } | |
394 | ||
44fa5b1e | 395 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
396 | |
397 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
398 | |
399 | /* If specs for an arrow have changed, do thorough redisplay | |
400 | to ensure we remove any arrow that should no longer exist. */ | |
ded34426 JB |
401 | if (! EQ (Voverlay_arrow_position, last_arrow_position) |
402 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) | |
a2889657 JB |
403 | all_windows = 1, clip_changed = 1; |
404 | ||
405 | tlbufpos = this_line_bufpos; | |
406 | tlendpos = this_line_endpos; | |
265a9e55 | 407 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
44fa5b1e | 408 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
a2889657 JB |
409 | /* Make sure recorded data applies to current buffer, etc */ |
410 | && this_line_buffer == current_buffer | |
411 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 412 | && NILP (w->force_start) |
a2889657 JB |
413 | /* Point must be on the line that we have info recorded about */ |
414 | && point >= tlbufpos | |
415 | && point <= Z - tlendpos | |
416 | /* All text outside that line, including its final newline, | |
417 | must be unchanged */ | |
418 | && (XFASTINT (w->last_modified) >= MODIFF | |
419 | || (beg_unchanged >= tlbufpos - 1 | |
420 | && GPT >= tlbufpos | |
05ba02eb JB |
421 | /* If selective display, can't optimize |
422 | if the changes start at the beginning of the line. */ | |
423 | && ((XTYPE (current_buffer->selective_display) == Lisp_Int | |
424 | && XINT (current_buffer->selective_display) > 0 | |
425 | ? (beg_unchanged >= tlbufpos | |
426 | && GPT > tlbufpos) | |
427 | : 1)) | |
a2889657 JB |
428 | && end_unchanged >= tlendpos |
429 | && Z - GPT >= tlendpos))) | |
430 | { | |
431 | if (tlbufpos > BEGV && FETCH_CHAR (tlbufpos - 1) != '\n' | |
432 | && (tlbufpos == ZV | |
433 | || FETCH_CHAR (tlbufpos) == '\n')) | |
434 | /* Former continuation line has disappeared by becoming empty */ | |
435 | goto cancel; | |
436 | else if (XFASTINT (w->last_modified) < MODIFF | |
437 | || MINI_WINDOW_P (w)) | |
438 | { | |
439 | cursor_vpos = -1; | |
440 | overlay_arrow_seen = 0; | |
441 | display_text_line (w, tlbufpos, this_line_vpos, this_line_start_hpos, | |
442 | pos_tab_offset (w, tlbufpos)); | |
443 | /* If line contains point, is not continued, | |
444 | and ends at same distance from eob as before, we win */ | |
445 | if (cursor_vpos >= 0 && this_line_bufpos | |
446 | && this_line_endpos == tlendpos) | |
447 | { | |
44fa5b1e | 448 | if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
449 | preserve_other_columns (w); |
450 | goto update; | |
451 | } | |
452 | else | |
453 | goto cancel; | |
454 | } | |
455 | else if (point == XFASTINT (w->last_point)) | |
456 | { | |
457 | if (!must_finish) | |
458 | { | |
459 | do_pending_window_change (); | |
460 | return; | |
461 | } | |
462 | goto update; | |
463 | } | |
464 | else | |
465 | { | |
466 | pos = *compute_motion (tlbufpos, 0, | |
467 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
468 | point, 2, - (1 << (SHORTBITS - 1)), | |
b1d1124b | 469 | window_internal_width (w) - 1, |
de3e8b15 JB |
470 | XINT (w->hscroll), |
471 | pos_tab_offset (w, tlbufpos)); | |
a2889657 JB |
472 | if (pos.vpos < 1) |
473 | { | |
44fa5b1e | 474 | FRAME_CURSOR_X (selected_frame) |
a2889657 | 475 | = XFASTINT (w->left) + max (pos.hpos, 0); |
44fa5b1e | 476 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
477 | goto update; |
478 | } | |
479 | else | |
480 | goto cancel; | |
481 | } | |
482 | cancel: | |
483 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 484 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
485 | } |
486 | ||
487 | this_line_bufpos = 0; | |
488 | all_windows |= buffer_shared > 1; | |
489 | ||
490 | if (all_windows) | |
491 | { | |
a2889657 | 492 | Lisp_Object tail; |
d724d989 | 493 | FRAME_PTR f; |
a2889657 JB |
494 | |
495 | /* Recompute # windows showing selected buffer. | |
8de2d90b | 496 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
497 | buffer_shared = 0; |
498 | ||
d724d989 | 499 | FOR_EACH_FRAME (tail, f) |
30c566e4 JB |
500 | { |
501 | /* Mark all the scrollbars to be removed; we'll redeem the ones | |
502 | we want when we redisplay their windows. */ | |
b1d1124b | 503 | if (condemn_scrollbars_hook) |
30c566e4 JB |
504 | (*condemn_scrollbars_hook) (f); |
505 | ||
506 | if (FRAME_VISIBLE_P (f)) | |
507 | redisplay_windows (FRAME_ROOT_WINDOW (f)); | |
508 | ||
509 | /* Any scrollbars which redisplay_windows should have nuked | |
510 | should now go away. */ | |
b1d1124b | 511 | if (judge_scrollbars_hook) |
30c566e4 JB |
512 | (*judge_scrollbars_hook) (f); |
513 | } | |
a2889657 | 514 | } |
44fa5b1e | 515 | else if (FRAME_VISIBLE_P (selected_frame)) |
a2889657 JB |
516 | { |
517 | redisplay_window (selected_window, 1); | |
44fa5b1e | 518 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
519 | preserve_other_columns (w); |
520 | } | |
521 | ||
522 | update: | |
523 | /* Prevent various kinds of signals during display update. | |
524 | stdio is not robust about handling signals, | |
525 | which can cause an apparent I/O error. */ | |
526 | if (interrupt_input) | |
527 | unrequest_sigio (); | |
528 | stop_polling (); | |
529 | ||
44fa5b1e | 530 | #ifdef MULTI_FRAME |
a2889657 JB |
531 | if (all_windows) |
532 | { | |
533 | Lisp_Object tail; | |
534 | ||
535 | pause = 0; | |
536 | ||
44fa5b1e | 537 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 538 | { |
44fa5b1e | 539 | FRAME_PTR f; |
a2889657 | 540 | |
44fa5b1e | 541 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
542 | continue; |
543 | ||
44fa5b1e | 544 | f = XFRAME (XCONS (tail)->car); |
30c566e4 | 545 | if (FRAME_VISIBLE_P (f)) |
a2889657 | 546 | { |
44fa5b1e | 547 | pause |= update_frame (f, 0, 0); |
a2889657 | 548 | if (!pause) |
44fa5b1e | 549 | mark_window_display_accurate (f->root_window, 1); |
a2889657 JB |
550 | } |
551 | } | |
552 | } | |
553 | else | |
44fa5b1e | 554 | #endif /* MULTI_FRAME */ |
6e8290aa | 555 | { |
44fa5b1e JB |
556 | if (FRAME_VISIBLE_P (selected_frame)) |
557 | pause = update_frame (selected_frame, 0, 0); | |
d724d989 | 558 | |
8de2d90b | 559 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
560 | function. If the echo area is on another frame, that may |
561 | have put text on a frame other than the selected one, so the | |
562 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
563 | it here. */ |
564 | { | |
44fa5b1e JB |
565 | FRAME_PTR mini_frame = |
566 | XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b | 567 | |
44fa5b1e JB |
568 | if (mini_frame != selected_frame) |
569 | pause |= update_frame (mini_frame, 0, 0); | |
8de2d90b | 570 | } |
6e8290aa | 571 | } |
a2889657 | 572 | |
44fa5b1e | 573 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
574 | Also, don't forget to check every line to update the arrow. */ |
575 | if (pause) | |
576 | { | |
577 | this_line_bufpos = 0; | |
265a9e55 | 578 | if (!NILP (last_arrow_position)) |
a2889657 JB |
579 | { |
580 | last_arrow_position = Qt; | |
581 | last_arrow_string = Qt; | |
582 | } | |
44fa5b1e | 583 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
584 | may be null, so preserve_other_columns won't be able to |
585 | preserve all the vertical-bar separators. So, avoid using it | |
586 | in that case. */ | |
44fa5b1e | 587 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
588 | update_mode_lines = 1; |
589 | } | |
590 | ||
44fa5b1e | 591 | /* Now text on frame agrees with windows, so |
a2889657 JB |
592 | put info into the windows for partial redisplay to follow */ |
593 | ||
594 | if (!pause) | |
595 | { | |
596 | register struct buffer *b = XBUFFER (w->buffer); | |
597 | ||
598 | blank_end_of_window = 0; | |
599 | clip_changed = 0; | |
600 | unchanged_modified = BUF_MODIFF (b); | |
601 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); | |
602 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
603 | ||
604 | XFASTINT (w->last_point) = BUF_PT (b); | |
44fa5b1e JB |
605 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (selected_frame); |
606 | XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame); | |
a2889657 JB |
607 | |
608 | if (all_windows) | |
11e82b76 | 609 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
610 | else |
611 | { | |
612 | w->update_mode_line = Qnil; | |
613 | XFASTINT (w->last_modified) = BUF_MODIFF (b); | |
614 | w->window_end_valid = Qt; | |
615 | last_arrow_position = Voverlay_arrow_position; | |
616 | last_arrow_string = Voverlay_arrow_string; | |
617 | } | |
618 | update_mode_lines = 0; | |
619 | windows_or_buffers_changed = 0; | |
620 | } | |
621 | ||
622 | /* Start SIGIO interrupts coming again. | |
623 | Having them off during the code above | |
624 | makes it less likely one will discard output, | |
625 | but not impossible, since there might be stuff | |
626 | in the system buffer here. | |
627 | But it is much hairier to try to do anything about that. */ | |
628 | ||
629 | if (interrupt_input) | |
630 | request_sigio (); | |
631 | start_polling (); | |
632 | ||
44fa5b1e | 633 | /* Change frame size now if a change is pending. */ |
a2889657 JB |
634 | do_pending_window_change (); |
635 | } | |
636 | ||
637 | /* Redisplay, but leave alone any recent echo area message | |
638 | unless another message has been requested in its place. | |
639 | ||
640 | This is useful in situations where you need to redisplay but no | |
641 | user action has occurred, making it inappropriate for the message | |
642 | area to be cleared. See tracking_off and | |
643 | wait_reading_process_input for examples of these situations. */ | |
644 | ||
645 | redisplay_preserve_echo_area () | |
646 | { | |
647 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
648 | { | |
649 | echo_area_glyphs = previous_echo_glyphs; | |
650 | redisplay (); | |
651 | echo_area_glyphs = 0; | |
652 | } | |
653 | else | |
654 | redisplay (); | |
655 | } | |
656 | ||
657 | void | |
658 | mark_window_display_accurate (window, flag) | |
659 | Lisp_Object window; | |
660 | int flag; | |
661 | { | |
662 | register struct window *w; | |
663 | ||
265a9e55 | 664 | for (;!NILP (window); window = w->next) |
a2889657 | 665 | { |
ded34426 | 666 | if (XTYPE (window) != Lisp_Window) abort (); |
a2889657 JB |
667 | w = XWINDOW (window); |
668 | ||
265a9e55 | 669 | if (!NILP (w->buffer)) |
a2889657 JB |
670 | XFASTINT (w->last_modified) |
671 | = !flag ? 0 | |
672 | : XBUFFER (w->buffer) == current_buffer | |
673 | ? MODIFF : BUF_MODIFF (XBUFFER (w->buffer)); | |
674 | w->window_end_valid = Qt; | |
675 | w->update_mode_line = Qnil; | |
676 | ||
265a9e55 | 677 | if (!NILP (w->vchild)) |
a2889657 | 678 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 679 | if (!NILP (w->hchild)) |
a2889657 JB |
680 | mark_window_display_accurate (w->hchild, flag); |
681 | } | |
682 | ||
683 | if (flag) | |
684 | { | |
685 | last_arrow_position = Voverlay_arrow_position; | |
686 | last_arrow_string = Voverlay_arrow_string; | |
687 | } | |
688 | else | |
689 | { | |
690 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
691 | last_arrow_position = Qt; | |
692 | last_arrow_string = Qt; | |
693 | } | |
694 | } | |
695 | \f | |
696 | int do_id = 1; | |
697 | ||
698 | static void | |
699 | redisplay_windows (window) | |
700 | Lisp_Object window; | |
701 | { | |
265a9e55 | 702 | for (; !NILP (window); window = XWINDOW (window)->next) |
a2889657 JB |
703 | redisplay_window (window, 0); |
704 | } | |
705 | ||
706 | static void | |
707 | redisplay_window (window, just_this_one) | |
708 | Lisp_Object window; | |
709 | int just_this_one; | |
710 | { | |
711 | register struct window *w = XWINDOW (window); | |
30c566e4 | 712 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 JB |
713 | int height; |
714 | register int lpoint = point; | |
715 | struct buffer *old = current_buffer; | |
b1d1124b | 716 | register int width = window_internal_width (w) - 1; |
a2889657 JB |
717 | register int startp; |
718 | register int hscroll = XINT (w->hscroll); | |
719 | struct position pos; | |
b1d1124b | 720 | int opoint = point; |
a2889657 JB |
721 | int tem; |
722 | int window_needs_modeline; | |
723 | ||
44fa5b1e | 724 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
725 | |
726 | /* If this is a combination window, do its children; that's all. */ | |
727 | ||
265a9e55 | 728 | if (!NILP (w->vchild)) |
a2889657 JB |
729 | { |
730 | redisplay_windows (w->vchild); | |
731 | return; | |
732 | } | |
265a9e55 | 733 | if (!NILP (w->hchild)) |
a2889657 JB |
734 | { |
735 | redisplay_windows (w->hchild); | |
736 | return; | |
737 | } | |
265a9e55 | 738 | if (NILP (w->buffer)) |
a2889657 | 739 | abort (); |
8de2d90b JB |
740 | |
741 | height = window_internal_height (w); | |
742 | ||
743 | if (MINI_WINDOW_P (w)) | |
744 | { | |
745 | if (w == XWINDOW (minibuf_window)) | |
746 | { | |
747 | if (echo_area_glyphs) | |
748 | /* We've already displayed the echo area glyphs, if any. */ | |
b1d1124b | 749 | goto finish_scrollbars; |
8de2d90b JB |
750 | } |
751 | else | |
752 | { | |
753 | /* This is a minibuffer, but it's not the currently active one, so | |
754 | clear it. */ | |
44fa5b1e | 755 | int vpos = XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
8de2d90b JB |
756 | int i; |
757 | ||
758 | for (i = 0; i < height; i++) | |
759 | { | |
44fa5b1e | 760 | get_display_line (f, vpos + i, 0); |
8de2d90b JB |
761 | display_string (w, vpos + i, "", 0, 0, 0, width); |
762 | } | |
763 | ||
b1d1124b | 764 | goto finish_scrollbars; |
8de2d90b JB |
765 | } |
766 | } | |
a2889657 JB |
767 | |
768 | if (update_mode_lines) | |
769 | w->update_mode_line = Qt; | |
770 | ||
771 | /* Otherwise set up data on this window; select its buffer and point value */ | |
772 | ||
a2889657 JB |
773 | current_buffer = XBUFFER (w->buffer); |
774 | opoint = point; | |
775 | ||
776 | /* Count number of windows showing the selected buffer. */ | |
777 | ||
778 | if (!just_this_one | |
779 | && current_buffer == XBUFFER (XWINDOW (selected_window)->buffer)) | |
780 | buffer_shared++; | |
781 | ||
782 | /* POINT refers normally to the selected window. | |
783 | For any other window, set up appropriate value. */ | |
784 | ||
785 | if (!EQ (window, selected_window)) | |
786 | { | |
787 | SET_PT (marker_position (w->pointm)); | |
788 | if (point < BEGV) | |
789 | { | |
265a9e55 | 790 | SET_PT (BEGV); |
a2889657 JB |
791 | Fset_marker (w->pointm, make_number (point), Qnil); |
792 | } | |
793 | else if (point > (ZV - 1)) | |
794 | { | |
265a9e55 | 795 | SET_PT (ZV); |
a2889657 JB |
796 | Fset_marker (w->pointm, make_number (point), Qnil); |
797 | } | |
798 | } | |
799 | ||
800 | /* If window-start is screwed up, choose a new one. */ | |
a2889657 JB |
801 | if (XMARKER (w->start)->buffer != current_buffer) |
802 | goto recenter; | |
803 | ||
804 | startp = marker_position (w->start); | |
805 | ||
8de2d90b JB |
806 | /* Handle case where place to start displaying has been specified, |
807 | unless the specified location is outside the visible range. */ | |
265a9e55 | 808 | if (!NILP (w->force_start)) |
a2889657 JB |
809 | { |
810 | w->update_mode_line = Qt; | |
811 | w->force_start = Qnil; | |
812 | XFASTINT (w->last_modified) = 0; | |
8de2d90b JB |
813 | if (startp < BEGV) startp = BEGV; |
814 | if (startp > ZV) startp = ZV; | |
a2889657 JB |
815 | try_window (window, startp); |
816 | if (cursor_vpos < 0) | |
817 | { | |
818 | /* If point does not appear, move point so it does appear */ | |
819 | pos = *compute_motion (startp, 0, | |
820 | ((EQ (window, minibuf_window) && startp == 1) | |
821 | ? minibuf_prompt_width : 0) | |
822 | + | |
823 | (hscroll ? 1 - hscroll : 0), | |
824 | ZV, height / 2, | |
825 | - (1 << (SHORTBITS - 1)), | |
826 | width, hscroll, pos_tab_offset (w, startp)); | |
827 | SET_PT (pos.bufpos); | |
44fa5b1e | 828 | if (w != XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
829 | Fset_marker (w->pointm, make_number (point), Qnil); |
830 | else | |
831 | { | |
832 | lpoint = point; | |
44fa5b1e JB |
833 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
834 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
835 | } |
836 | } | |
837 | goto done; | |
838 | } | |
839 | ||
840 | /* Handle case where text has not changed, only point, | |
44fa5b1e | 841 | and it has not moved off the frame */ |
a2889657 JB |
842 | |
843 | /* This code is not used for minibuffer for the sake of | |
844 | the case of redisplaying to replace an echo area message; | |
845 | since in that case the minibuffer contents per se are usually unchanged. | |
846 | This code is of no real use in the minibuffer since | |
847 | the handling of this_line_bufpos, etc., | |
848 | in redisplay handles the same cases. */ | |
849 | ||
850 | if (XFASTINT (w->last_modified) >= MODIFF | |
851 | && point >= startp && !clip_changed | |
44fa5b1e | 852 | && (just_this_one || XFASTINT (w->width) == FRAME_WIDTH (f)) |
a2889657 JB |
853 | && !EQ (window, minibuf_window)) |
854 | { | |
855 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), | |
856 | point, height + 1, 10000, width, hscroll, | |
857 | pos_tab_offset (w, startp)); | |
858 | ||
859 | if (pos.vpos < height) | |
860 | { | |
44fa5b1e JB |
861 | /* Ok, point is still on frame */ |
862 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
863 | { |
864 | /* These variables are supposed to be origin 1 */ | |
44fa5b1e JB |
865 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
866 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
867 | } |
868 | /* This doesn't do the trick, because if a window to the right of | |
869 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 870 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 871 | redisplayed, making likes that are empty in this window's columns. |
44fa5b1e | 872 | if (XFASTINT (w->width) != FRAME_WIDTH (f)) |
a2889657 JB |
873 | preserve_my_columns (w); |
874 | */ | |
875 | goto done; | |
876 | } | |
877 | /* Don't bother trying redisplay with same start; | |
878 | we already know it will lose */ | |
879 | } | |
880 | /* If current starting point was originally the beginning of a line | |
881 | but no longer is, find a new starting point. */ | |
265a9e55 | 882 | else if (!NILP (w->start_at_line_beg) |
a2889657 JB |
883 | && !(startp == BEGV |
884 | || FETCH_CHAR (startp - 1) == '\n')) | |
885 | { | |
886 | goto recenter; | |
887 | } | |
888 | else if (just_this_one && !MINI_WINDOW_P (w) | |
889 | && point >= startp | |
890 | && XFASTINT (w->last_modified) | |
891 | && ! EQ (w->window_end_valid, Qnil) | |
892 | && do_id && !clip_changed | |
893 | && !blank_end_of_window | |
44fa5b1e | 894 | && XFASTINT (w->width) == FRAME_WIDTH (f) |
a2889657 JB |
895 | && EQ (last_arrow_position, Voverlay_arrow_position) |
896 | && EQ (last_arrow_string, Voverlay_arrow_string) | |
44fa5b1e | 897 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
898 | && tem != -2) |
899 | { | |
900 | /* tem > 0 means success. tem == -1 means choose new start. | |
901 | tem == -2 means try again with same start, | |
902 | and nothing but whitespace follows the changed stuff. | |
903 | tem == 0 means try again with same start. */ | |
904 | if (tem > 0) | |
905 | goto done; | |
906 | } | |
907 | else if (startp >= BEGV && startp <= ZV | |
908 | /* Avoid starting display at end of buffer! */ | |
8de2d90b | 909 | && (startp < ZV || startp == BEGV |
a2889657 JB |
910 | || (XFASTINT (w->last_modified) >= MODIFF))) |
911 | { | |
912 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 913 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
914 | try_window (window, startp); |
915 | if (cursor_vpos >= 0) | |
916 | goto done; | |
917 | else | |
918 | cancel_my_columns (w); | |
919 | } | |
920 | ||
921 | XFASTINT (w->last_modified) = 0; | |
922 | w->update_mode_line = Qt; | |
923 | ||
924 | /* Try to scroll by specified few lines */ | |
925 | ||
926 | if (scroll_step && !clip_changed) | |
927 | { | |
928 | if (point > startp) | |
929 | { | |
930 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), | |
931 | scroll_step, width, hscroll, window); | |
932 | if (pos.vpos >= height) | |
933 | goto scroll_fail; | |
934 | } | |
935 | ||
936 | pos = *vmotion (startp, point < startp ? - scroll_step : scroll_step, | |
937 | width, hscroll, window); | |
938 | ||
939 | if (point >= pos.bufpos) | |
940 | { | |
941 | try_window (window, pos.bufpos); | |
942 | if (cursor_vpos >= 0) | |
943 | goto done; | |
944 | else | |
945 | cancel_my_columns (w); | |
946 | } | |
947 | scroll_fail: ; | |
948 | } | |
949 | ||
950 | /* Finally, just choose place to start which centers point */ | |
951 | ||
952 | recenter: | |
953 | pos = *vmotion (point, - height / 2, width, hscroll, window); | |
954 | try_window (window, pos.bufpos); | |
955 | ||
956 | startp = marker_position (w->start); | |
957 | w->start_at_line_beg = | |
958 | (startp == BEGV || FETCH_CHAR (startp - 1) == '\n') ? Qt : Qnil; | |
959 | ||
960 | done: | |
961 | /* If window not full width, must redo its mode line | |
962 | if the window to its side is being redone */ | |
265a9e55 | 963 | if ((!NILP (w->update_mode_line) |
44fa5b1e | 964 | || (!just_this_one && width < FRAME_WIDTH (f) - 1)) |
a2889657 JB |
965 | && height != XFASTINT (w->height)) |
966 | display_mode_line (w); | |
967 | ||
b1d1124b | 968 | finish_scrollbars: |
30c566e4 JB |
969 | if (FRAME_HAS_VERTICAL_SCROLLBARS (f)) |
970 | { | |
b1d1124b | 971 | int start, end, whole; |
30c566e4 | 972 | |
b1d1124b JB |
973 | /* Calculate the start and end positions for the current window. |
974 | Note that minibuffers sometimes aren't displaying any text. */ | |
975 | if (! MINI_WINDOW_P (w) | |
976 | || (w == XWINDOW (minibuf_window) && ! echo_area_glyphs)) | |
977 | { | |
978 | start = startp; | |
979 | /* I don't think this is guaranteed to be right. For the | |
980 | moment, we'll pretend it is. */ | |
981 | end = Z - XINT (w->window_end_pos); | |
982 | whole = Z - BEG; | |
983 | } | |
984 | else | |
985 | start = end = whole = 0; | |
30c566e4 JB |
986 | |
987 | /* Indicate what this scrollbar ought to be displaying now. */ | |
b1d1124b | 988 | (*set_vertical_scrollbar_hook) (w, end - start, whole, start - 1); |
30c566e4 JB |
989 | |
990 | /* Note that we actually used the scrollbar attached to this window, | |
991 | so it shouldn't be deleted at the end of redisplay. */ | |
b1d1124b | 992 | (*redeem_scrollbar_hook) (w); |
30c566e4 | 993 | } |
b1d1124b JB |
994 | |
995 | SET_PT (opoint); | |
996 | current_buffer = old; | |
997 | SET_PT (lpoint); | |
a2889657 JB |
998 | } |
999 | \f | |
1000 | /* Do full redisplay on one window, starting at position `pos'. */ | |
1001 | ||
1002 | static void | |
1003 | try_window (window, pos) | |
1004 | Lisp_Object window; | |
1005 | register int pos; | |
1006 | { | |
1007 | register struct window *w = XWINDOW (window); | |
1008 | register int height = window_internal_height (w); | |
1009 | register int vpos = XFASTINT (w->top); | |
1010 | register int last_text_vpos = vpos; | |
1011 | int tab_offset = pos_tab_offset (w, pos); | |
44fa5b1e | 1012 | FRAME_PTR f = XFRAME (w->frame); |
b1d1124b | 1013 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1014 | struct position val; |
1015 | ||
1016 | Fset_marker (w->start, make_number (pos), Qnil); | |
1017 | cursor_vpos = -1; | |
1018 | overlay_arrow_seen = 0; | |
1019 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1020 | ||
1021 | while (--height >= 0) | |
1022 | { | |
1023 | val = *display_text_line (w, pos, vpos, val.hpos, tab_offset); | |
1024 | tab_offset += width; | |
1025 | if (val.vpos) tab_offset = 0; | |
1026 | vpos++; | |
1027 | if (pos != val.bufpos) | |
1028 | last_text_vpos | |
1029 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1030 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1031 | pos = val.bufpos; | |
1032 | } | |
1033 | ||
1034 | /* If last line is continued in middle of character, | |
44fa5b1e | 1035 | include the split character in the text considered on the frame */ |
a2889657 JB |
1036 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
1037 | pos++; | |
1038 | ||
44fa5b1e | 1039 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1040 | if (XFASTINT (w->window_end_pos) == 0 |
1041 | && Z != pos) | |
1042 | w->update_mode_line = Qt; | |
1043 | ||
44fa5b1e | 1044 | /* Say where last char on frame will be, once redisplay is finished. */ |
a2889657 JB |
1045 | XFASTINT (w->window_end_pos) = Z - pos; |
1046 | XFASTINT (w->window_end_vpos) = last_text_vpos - XFASTINT (w->top); | |
1047 | /* But that is not valid info until redisplay finishes. */ | |
1048 | w->window_end_valid = Qnil; | |
1049 | } | |
1050 | \f | |
1051 | /* Try to redisplay when buffer is modified locally, | |
1052 | computing insert/delete line to preserve text outside | |
1053 | the bounds of the changes. | |
1054 | Return 1 if successful, 0 if if cannot tell what to do, | |
1055 | or -1 to tell caller to find a new window start, | |
1056 | or -2 to tell caller to do normal redisplay with same window start. */ | |
1057 | ||
1058 | static int | |
1059 | try_window_id (window) | |
1060 | Lisp_Object window; | |
1061 | { | |
1062 | int pos; | |
1063 | register struct window *w = XWINDOW (window); | |
1064 | register int height = window_internal_height (w); | |
44fa5b1e | 1065 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
1066 | int top = XFASTINT (w->top); |
1067 | int start = marker_position (w->start); | |
b1d1124b | 1068 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1069 | int hscroll = XINT (w->hscroll); |
1070 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
1071 | register int vpos; | |
1072 | register int i, tem; | |
1073 | int last_text_vpos = 0; | |
1074 | int stop_vpos; | |
1075 | ||
1076 | struct position val, bp, ep, xp, pp; | |
1077 | int scroll_amount = 0; | |
1078 | int delta; | |
1079 | int tab_offset, epto; | |
1080 | ||
1081 | if (GPT - BEG < beg_unchanged) | |
1082 | beg_unchanged = GPT - BEG; | |
1083 | if (Z - GPT < end_unchanged) | |
1084 | end_unchanged = Z - GPT; | |
1085 | ||
1086 | if (beg_unchanged + 1 < start) | |
1087 | return 0; /* Give up if changes go above top of window */ | |
1088 | ||
1089 | /* Find position before which nothing is changed. */ | |
1090 | bp = *compute_motion (start, 0, lmargin, | |
f7be7f78 | 1091 | beg_unchanged + 1, height + 1, 0, width, hscroll, |
a2889657 JB |
1092 | pos_tab_offset (w, start)); |
1093 | if (bp.vpos >= height) | |
6e8290aa JB |
1094 | { |
1095 | if (point < bp.bufpos && !bp.contin) | |
1096 | { | |
44fa5b1e JB |
1097 | /* All changes are below the frame, and point is on the frame. |
1098 | We don't need to change the frame at all. | |
6e8290aa JB |
1099 | But we need to update window_end_pos to account for |
1100 | any change in buffer size. */ | |
f7be7f78 JB |
1101 | bp = *compute_motion (start, 0, lmargin, |
1102 | Z, height, 0, | |
1103 | width, hscroll, pos_tab_offset (w, start)); | |
6e8290aa JB |
1104 | XFASTINT (w->window_end_vpos) = height; |
1105 | XFASTINT (w->window_end_pos) = Z - bp.bufpos; | |
1106 | return 1; | |
1107 | } | |
1108 | return 0; | |
1109 | } | |
a2889657 JB |
1110 | |
1111 | vpos = bp.vpos; | |
1112 | ||
44fa5b1e | 1113 | /* Find beginning of that frame line. Must display from there. */ |
a2889657 JB |
1114 | bp = *vmotion (bp.bufpos, 0, width, hscroll, window); |
1115 | ||
1116 | pos = bp.bufpos; | |
1117 | val.hpos = lmargin; | |
1118 | if (pos < start) | |
1119 | return -1; | |
1120 | ||
1121 | /* If about to start displaying at the beginning of a continuation line, | |
44fa5b1e | 1122 | really start with previous frame line, in case it was not |
a2889657 | 1123 | continued when last redisplayed */ |
05ba02eb JB |
1124 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
1125 | || | |
1126 | /* Likewise if we have to worry about selective display. */ | |
1127 | (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1128 | && XINT (current_buffer->selective_display) > 0 | |
1129 | && bp.bufpos - 1 == beg_unchanged && vpos > 0)) | |
a2889657 JB |
1130 | { |
1131 | bp = *vmotion (bp.bufpos, -1, width, hscroll, window); | |
1132 | --vpos; | |
1133 | pos = bp.bufpos; | |
1134 | } | |
1135 | ||
1136 | if (bp.contin && bp.hpos != lmargin) | |
1137 | { | |
1138 | val.hpos = bp.prevhpos - width + lmargin; | |
1139 | pos--; | |
1140 | } | |
1141 | ||
1142 | bp.vpos = vpos; | |
1143 | ||
1144 | /* Find first visible newline after which no more is changed. */ | |
1145 | tem = find_next_newline (Z - max (end_unchanged, Z - ZV), 1); | |
1146 | if (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1147 | && XINT (current_buffer->selective_display) > 0) | |
1148 | while (tem < ZV - 1 | |
1149 | && (position_indentation (tem) | |
1150 | >= XINT (current_buffer->selective_display))) | |
1151 | tem = find_next_newline (tem, 1); | |
1152 | ||
1153 | /* Compute the cursor position after that newline. */ | |
1154 | ep = *compute_motion (pos, vpos, val.hpos, tem, | |
1155 | height, - (1 << (SHORTBITS - 1)), | |
1156 | width, hscroll, pos_tab_offset (w, bp.bufpos)); | |
1157 | ||
44fa5b1e JB |
1158 | /* If changes reach past the text available on the frame, |
1159 | just display rest of frame. */ | |
a2889657 JB |
1160 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
1161 | stop_vpos = height; | |
1162 | else | |
1163 | stop_vpos = ep.vpos; | |
1164 | ||
1165 | /* If no newline before ep, the line ep is on includes some changes | |
1166 | that must be displayed. Make sure we don't stop before it. */ | |
1167 | /* Also, if changes reach all the way until ep.bufpos, | |
1168 | it is possible that something was deleted after the | |
1169 | newline before it, so the following line must be redrawn. */ | |
1170 | if (stop_vpos == ep.vpos | |
1171 | && (ep.bufpos == BEGV | |
1172 | || FETCH_CHAR (ep.bufpos - 1) != '\n' | |
1173 | || ep.bufpos == Z - end_unchanged)) | |
1174 | stop_vpos = ep.vpos + 1; | |
1175 | ||
1176 | cursor_vpos = -1; | |
1177 | overlay_arrow_seen = 0; | |
1178 | ||
1179 | /* If changes do not reach to bottom of window, | |
1180 | figure out how much to scroll the rest of the window */ | |
1181 | if (stop_vpos < height) | |
1182 | { | |
1183 | /* Now determine how far up or down the rest of the window has moved */ | |
1184 | epto = pos_tab_offset (w, ep.bufpos); | |
1185 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1186 | Z - XFASTINT (w->window_end_pos), | |
1187 | 10000, 0, width, hscroll, epto); | |
1188 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); | |
1189 | ||
44fa5b1e | 1190 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
1191 | If so, no scrolling is really necessary. */ |
1192 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
1193 | { | |
1194 | tem = FETCH_CHAR (i); | |
1195 | if (tem != ' ' && tem != '\n' && tem != '\t') | |
1196 | break; | |
1197 | } | |
1198 | if (i == xp.bufpos) | |
1199 | return -2; | |
1200 | ||
1201 | XFASTINT (w->window_end_vpos) += scroll_amount; | |
1202 | ||
44fa5b1e | 1203 | /* Before doing any scrolling, verify that point will be on frame. */ |
a2889657 JB |
1204 | if (point > ep.bufpos && !(point <= xp.bufpos && xp.bufpos < height)) |
1205 | { | |
1206 | if (point <= xp.bufpos) | |
1207 | { | |
1208 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1209 | point, height, - (1 << (SHORTBITS - 1)), | |
1210 | width, hscroll, epto); | |
1211 | } | |
1212 | else | |
1213 | { | |
1214 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, | |
1215 | point, height, - (1 << (SHORTBITS - 1)), | |
1216 | width, hscroll, pos_tab_offset (w, xp.bufpos)); | |
1217 | } | |
1218 | if (pp.bufpos < point || pp.vpos == height) | |
1219 | return 0; | |
1220 | cursor_vpos = pp.vpos + top; | |
1221 | cursor_hpos = pp.hpos + XFASTINT (w->left); | |
1222 | } | |
1223 | ||
1224 | if (stop_vpos - scroll_amount >= height | |
1225 | || ep.bufpos == xp.bufpos) | |
1226 | { | |
1227 | if (scroll_amount < 0) | |
1228 | stop_vpos -= scroll_amount; | |
1229 | scroll_amount = 0; | |
1230 | /* In this path, we have altered window_end_vpos | |
1231 | and not left it negative. | |
1232 | We must make sure that, in case display is preempted | |
44fa5b1e | 1233 | before the frame changes to reflect what we do here, |
a2889657 | 1234 | further updates will not come to try_window_id |
44fa5b1e | 1235 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
1236 | blank_end_of_window = 1; |
1237 | } | |
1238 | else if (!scroll_amount) | |
1239 | {} | |
1240 | else if (bp.bufpos == Z - end_unchanged) | |
1241 | { | |
1242 | /* If reprinting everything is nearly as fast as scrolling, | |
1243 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 1244 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1245 | top + height - max (0, scroll_amount), |
1246 | scroll_amount) | |
1247 | > xp.bufpos - bp.bufpos - 20) | |
1248 | /* Return "try normal display with same window-start." | |
1249 | Too bad we can't prevent further scroll-thinking. */ | |
1250 | return -2; | |
1251 | /* If pure deletion, scroll up as many lines as possible. | |
1252 | In common case of killing a line, this can save the | |
1253 | following line from being overwritten by scrolling | |
1254 | and therefore having to be redrawn. */ | |
44fa5b1e | 1255 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1256 | top + height - max (0, scroll_amount), |
1257 | scroll_amount); | |
1258 | if (!tem) stop_vpos = height; | |
1259 | } | |
1260 | else if (scroll_amount) | |
1261 | { | |
1262 | /* If reprinting everything is nearly as fast as scrolling, | |
1263 | don't bother scrolling. Can happen if lines are short. */ | |
1264 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
1265 | overestimate of cost of reprinting, since xp.bufpos | |
1266 | would end up below the bottom of the window. */ | |
44fa5b1e | 1267 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1268 | top + height - max (0, scroll_amount), |
1269 | scroll_amount) | |
1270 | > xp.bufpos - ep.bufpos - 20) | |
1271 | /* Return "try normal display with same window-start." | |
1272 | Too bad we can't prevent further scroll-thinking. */ | |
1273 | return -2; | |
44fa5b1e | 1274 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1275 | top + height - max (0, scroll_amount), |
1276 | scroll_amount); | |
1277 | if (!tem) stop_vpos = height; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | /* In any case, do not display past bottom of window */ | |
1282 | if (stop_vpos >= height) | |
1283 | { | |
1284 | stop_vpos = height; | |
1285 | scroll_amount = 0; | |
1286 | } | |
1287 | ||
1288 | /* Handle case where pos is before w->start -- | |
1289 | can happen if part of line had been clipped and is not clipped now */ | |
1290 | if (vpos == 0 && pos < marker_position (w->start)) | |
1291 | Fset_marker (w->start, make_number (pos), Qnil); | |
1292 | ||
1293 | /* Redisplay the lines where the text was changed */ | |
1294 | last_text_vpos = vpos; | |
1295 | tab_offset = pos_tab_offset (w, pos); | |
1296 | /* If we are starting display in mid-character, correct tab_offset | |
1297 | to account for passing the line that that character really starts in. */ | |
1298 | if (val.hpos < lmargin) | |
1299 | tab_offset += width; | |
1300 | while (vpos < stop_vpos) | |
1301 | { | |
1302 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1303 | tab_offset += width; | |
1304 | if (val.vpos) tab_offset = 0; | |
1305 | if (pos != val.bufpos) | |
1306 | last_text_vpos | |
1307 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1308 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1309 | pos = val.bufpos; | |
1310 | } | |
1311 | ||
1312 | /* There are two cases: | |
1313 | 1) we have displayed down to the bottom of the window | |
1314 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
1315 | ||
1316 | if (vpos == height) | |
1317 | { | |
1318 | /* If last line is continued in middle of character, | |
44fa5b1e | 1319 | include the split character in the text considered on the frame */ |
a2889657 JB |
1320 | if (val.hpos < lmargin) |
1321 | val.bufpos++; | |
1322 | XFASTINT (w->window_end_vpos) = last_text_vpos; | |
1323 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1324 | } | |
1325 | ||
1326 | /* If scrolling made blank lines at window bottom, | |
1327 | redisplay to fill those lines */ | |
1328 | if (scroll_amount < 0) | |
1329 | { | |
1330 | /* Don't consider these lines for general-purpose scrolling. | |
1331 | That will save time in the scrolling computation. */ | |
44fa5b1e | 1332 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
1333 | vpos = xp.vpos; |
1334 | pos = xp.bufpos; | |
1335 | val.hpos = lmargin; | |
1336 | if (pos == ZV) | |
1337 | vpos = height + scroll_amount; | |
1338 | else if (xp.contin && xp.hpos != lmargin) | |
1339 | { | |
1340 | val.hpos = xp.prevhpos - width + lmargin; | |
1341 | pos--; | |
1342 | } | |
1343 | ||
1344 | blank_end_of_window = 1; | |
1345 | tab_offset = pos_tab_offset (w, pos); | |
1346 | /* If we are starting display in mid-character, correct tab_offset | |
1347 | to account for passing the line that that character starts in. */ | |
1348 | if (val.hpos < lmargin) | |
1349 | tab_offset += width; | |
1350 | ||
1351 | while (vpos < height) | |
1352 | { | |
1353 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1354 | tab_offset += width; | |
1355 | if (val.vpos) tab_offset = 0; | |
1356 | pos = val.bufpos; | |
1357 | } | |
1358 | ||
1359 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
1360 | Make it be fixed up, below. */ | |
1361 | if (xp.bufpos == ZV | |
1362 | && xp.bufpos == point) | |
1363 | cursor_vpos = -1; | |
1364 | } | |
1365 | ||
44fa5b1e | 1366 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1367 | if (XFASTINT (w->window_end_pos) == 0 |
1368 | && Z != val.bufpos) | |
1369 | w->update_mode_line = Qt; | |
1370 | ||
1371 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
1372 | if (scroll_amount) | |
1373 | { | |
1374 | delta = height - xp.vpos; | |
1375 | if (delta < 0 | |
1376 | || (delta > 0 && xp.bufpos <= ZV) | |
1377 | || (delta == 0 && xp.hpos)) | |
1378 | { | |
1379 | val = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1380 | delta, width, hscroll, window); | |
1381 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1382 | XFASTINT (w->window_end_vpos) += val.vpos; | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | w->window_end_valid = Qnil; | |
1387 | ||
1388 | /* If point was not in a line that was displayed, find it */ | |
1389 | if (cursor_vpos < 0) | |
1390 | { | |
1391 | val = *compute_motion (start, 0, lmargin, point, 10000, 10000, | |
1392 | width, hscroll, pos_tab_offset (w, start)); | |
44fa5b1e | 1393 | /* Admit failure if point is off frame now */ |
a2889657 JB |
1394 | if (val.vpos >= height) |
1395 | { | |
1396 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 1397 | cancel_line (vpos + top, f); |
a2889657 JB |
1398 | return 0; |
1399 | } | |
1400 | cursor_vpos = val.vpos + top; | |
1401 | cursor_hpos = val.hpos + XFASTINT (w->left); | |
1402 | } | |
1403 | ||
44fa5b1e JB |
1404 | FRAME_CURSOR_X (f) = max (0, cursor_hpos); |
1405 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
a2889657 JB |
1406 | |
1407 | if (debug_end_pos) | |
1408 | { | |
1409 | val = *compute_motion (start, 0, lmargin, ZV, | |
1410 | height, - (1 << (SHORTBITS - 1)), | |
1411 | width, hscroll, pos_tab_offset (w, start)); | |
1412 | if (val.vpos != XFASTINT (w->window_end_vpos)) | |
1413 | abort (); | |
1414 | if (XFASTINT (w->window_end_pos) | |
1415 | != Z - val.bufpos) | |
1416 | abort (); | |
1417 | } | |
1418 | ||
1419 | return 1; | |
1420 | } | |
1421 | \f | |
f7430cb6 JB |
1422 | /* Copy glyphs from the rope FROM to T. |
1423 | But don't actually copy the parts that would come in before S. | |
a2889657 JB |
1424 | Value is T, advanced past the copied data. |
1425 | ||
1426 | Characters in FROM are grouped into units of `sizeof GLYPH' chars; | |
1427 | any extra chars at the end of FROM are ignored. */ | |
1428 | ||
1429 | GLYPH * | |
1430 | copy_rope (t, s, from) | |
1431 | register GLYPH *t; /* Copy to here. */ | |
1432 | register GLYPH *s; /* Starting point. */ | |
1433 | Lisp_Object from; /* Data to copy; known to be a string. */ | |
1434 | { | |
1435 | register int n = XSTRING (from)->size / sizeof (GLYPH); | |
1436 | register GLYPH *f = (GLYPH *) XSTRING (from)->data; | |
1437 | ||
1438 | while (n--) | |
1439 | { | |
1440 | if (t >= s) *t = *f; | |
1441 | ++t; | |
1442 | ++f; | |
1443 | } | |
1444 | return t; | |
1445 | } | |
1446 | \f | |
1447 | /* Display one line of window w, starting at position START in W's buffer. | |
1448 | Display starting at horizontal position HPOS, which is normally zero | |
1449 | or negative. A negative value causes output up to hpos = 0 to be discarded. | |
1450 | This is done for negative hscroll, or when this is a continuation line | |
1451 | and the continuation occurred in the middle of a multi-column character. | |
1452 | ||
1453 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
1454 | ||
44fa5b1e | 1455 | Display on position VPOS on the frame. (origin 0). |
a2889657 JB |
1456 | |
1457 | Returns a STRUCT POSITION giving character to start next line with | |
1458 | and where to display it, including a zero or negative hpos. | |
1459 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
1460 | ||
1461 | struct position val_display_text_line; | |
1462 | ||
1463 | static struct position * | |
1464 | display_text_line (w, start, vpos, hpos, taboffset) | |
1465 | struct window *w; | |
1466 | int start; | |
1467 | int vpos; | |
1468 | int hpos; | |
1469 | int taboffset; | |
1470 | { | |
1471 | register int pos = start; | |
1472 | register int c; | |
1473 | register GLYPH *p1; | |
1474 | int end; | |
1475 | register int pause; | |
1476 | register unsigned char *p; | |
1477 | GLYPH *endp; | |
1478 | register GLYPH *startp; | |
1479 | register GLYPH *p1prev; | |
44fa5b1e | 1480 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 1481 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 1482 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
b1d1124b | 1483 | int width = window_internal_width (w) - 1; |
a2889657 JB |
1484 | struct position val; |
1485 | int lastpos; | |
1486 | int invis; | |
1487 | int hscroll = XINT (w->hscroll); | |
1488 | int truncate = hscroll | |
1489 | || (truncate_partial_width_windows | |
44fa5b1e | 1490 | && XFASTINT (w->width) < FRAME_WIDTH (f)) |
265a9e55 | 1491 | || !NILP (current_buffer->truncate_lines); |
a2889657 JB |
1492 | int selective |
1493 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1494 | ? XINT (current_buffer->selective_display) | |
265a9e55 | 1495 | : !NILP (current_buffer->selective_display) ? -1 : 0; |
a2889657 | 1496 | #ifndef old |
265a9e55 | 1497 | int selective_e = selective && !NILP (current_buffer->selective_display_ellipses); |
a2889657 | 1498 | #endif |
44fa5b1e | 1499 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
a2889657 JB |
1500 | register struct Lisp_Vector *dp = window_display_table (w); |
1501 | int selective_rlen | |
1502 | = (selective && dp && XTYPE (DISP_INVIS_ROPE (dp)) == Lisp_String | |
1503 | ? XSTRING (DISP_INVIS_ROPE (dp))->size / sizeof (GLYPH) : 0); | |
1504 | GLYPH truncator = (dp == 0 || XTYPE (DISP_TRUNC_GLYPH (dp)) != Lisp_Int | |
1505 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); | |
1506 | GLYPH continuer = (dp == 0 || XTYPE (DISP_CONTINUE_GLYPH (dp)) != Lisp_Int | |
1507 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); | |
1508 | ||
1509 | hpos += XFASTINT (w->left); | |
44fa5b1e | 1510 | get_display_line (f, vpos, XFASTINT (w->left)); |
a2889657 JB |
1511 | if (tab_width <= 0 || tab_width > 20) tab_width = 8; |
1512 | ||
1513 | if (MINI_WINDOW_P (w) && start == 1 | |
1514 | && vpos == XFASTINT (w->top)) | |
1515 | { | |
1516 | if (minibuf_prompt) | |
1517 | hpos = display_string (w, vpos, minibuf_prompt, hpos, | |
1518 | (!truncate ? continuer : truncator), | |
1519 | -1, -1); | |
1520 | minibuf_prompt_width = hpos; | |
1521 | } | |
1522 | ||
1523 | desired_glyphs->bufp[vpos] = pos; | |
1524 | p1 = desired_glyphs->glyphs[vpos] + hpos; | |
1525 | end = ZV; | |
1526 | startp = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
1527 | endp = startp + width; | |
1528 | ||
1529 | /* Loop generating characters. | |
1530 | Stop at end of buffer, before newline, | |
1531 | or if reach or pass continuation column. */ | |
1532 | ||
1533 | pause = pos; | |
1534 | while (p1 < endp) | |
1535 | { | |
1536 | p1prev = p1; | |
1537 | if (pos == pause) | |
1538 | { | |
1539 | if (pos == end) | |
1540 | break; | |
1541 | if (pos == point && cursor_vpos < 0) | |
1542 | { | |
1543 | cursor_vpos = vpos; | |
1544 | cursor_hpos = p1 - startp; | |
1545 | } | |
1546 | ||
1547 | pause = end; | |
1548 | if (pos < point && point < pause) | |
1549 | pause = point; | |
1550 | if (pos < GPT && GPT < pause) | |
1551 | pause = GPT; | |
1552 | ||
1553 | p = &FETCH_CHAR (pos); | |
1554 | } | |
1555 | c = *p++; | |
1556 | if (c >= 040 && c < 0177 | |
1557 | && (dp == 0 || XTYPE (DISP_CHAR_ROPE (dp, c)) != Lisp_String)) | |
1558 | { | |
1559 | if (p1 >= startp) | |
1560 | *p1 = c; | |
1561 | p1++; | |
1562 | } | |
1563 | else if (c == '\n') | |
1564 | { | |
1565 | invis = 0; | |
1566 | while (pos < end | |
1567 | && selective > 0 | |
1568 | && position_indentation (pos + 1) >= selective) | |
1569 | { | |
1570 | invis = 1; | |
1571 | pos = find_next_newline (pos + 1, 1); | |
1572 | if (FETCH_CHAR (pos - 1) == '\n') | |
1573 | pos--; | |
1574 | } | |
1575 | if (invis && selective_rlen > 0 && p1 >= startp) | |
1576 | { | |
1577 | p1 += selective_rlen; | |
1578 | if (p1 - startp > width) | |
1579 | p1 = endp; | |
1580 | bcopy (XSTRING (DISP_INVIS_ROPE (dp))->data, p1prev, | |
1581 | (p1 - p1prev) * sizeof (GLYPH)); | |
1582 | } | |
1583 | break; | |
1584 | } | |
1585 | else if (c == '\t') | |
1586 | { | |
1587 | do | |
1588 | { | |
1589 | if (p1 >= startp && p1 < endp) | |
1590 | *p1 = SPACEGLYPH; | |
1591 | p1++; | |
1592 | } | |
1593 | while ((p1 - startp + taboffset + hscroll - (hscroll > 0)) | |
1594 | % tab_width); | |
1595 | } | |
6e8290aa | 1596 | else if (c == Ctl ('M') && selective == -1) |
a2889657 JB |
1597 | { |
1598 | pos = find_next_newline (pos, 1); | |
1599 | if (FETCH_CHAR (pos - 1) == '\n') | |
1600 | pos--; | |
1601 | if (selective_rlen > 0) | |
1602 | { | |
1603 | p1 += selective_rlen; | |
1604 | if (p1 - startp > width) | |
1605 | p1 = endp; | |
1606 | bcopy (XSTRING (DISP_INVIS_ROPE (dp))->data, p1prev, | |
1607 | (p1 - p1prev) * sizeof (GLYPH)); | |
1608 | } | |
1609 | break; | |
1610 | } | |
1611 | else if (dp != 0 && XTYPE (DISP_CHAR_ROPE (dp, c)) == Lisp_String) | |
1612 | { | |
1613 | p1 = copy_rope (p1, startp, DISP_CHAR_ROPE (dp, c)); | |
1614 | } | |
1615 | else if (c < 0200 && ctl_arrow) | |
1616 | { | |
1617 | if (p1 >= startp) | |
1618 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
1619 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
1620 | p1++; | |
6e8290aa | 1621 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1622 | *p1 = c ^ 0100; |
1623 | p1++; | |
1624 | } | |
1625 | else | |
1626 | { | |
1627 | if (p1 >= startp) | |
1628 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
1629 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
1630 | p1++; | |
6e8290aa | 1631 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1632 | *p1 = (c >> 6) + '0'; |
1633 | p1++; | |
6e8290aa | 1634 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1635 | *p1 = (7 & (c >> 3)) + '0'; |
1636 | p1++; | |
6e8290aa | 1637 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1638 | *p1 = (7 & c) + '0'; |
1639 | p1++; | |
1640 | } | |
1641 | pos++; | |
1642 | } | |
1643 | ||
1644 | val.hpos = - XINT (w->hscroll); | |
1645 | if (val.hpos) | |
1646 | val.hpos++; | |
1647 | ||
1648 | val.vpos = 1; | |
1649 | ||
1650 | lastpos = pos; | |
1651 | ||
1652 | /* Handle continuation in middle of a character */ | |
1653 | /* by backing up over it */ | |
1654 | if (p1 > endp) | |
1655 | { | |
1656 | /* Start the next line with that same character */ | |
1657 | pos--; | |
1658 | /* but at a negative hpos, to skip the columns output on this line. */ | |
1659 | val.hpos += p1prev - endp; | |
1660 | /* Keep in this line everything up to the continuation column. */ | |
1661 | p1 = endp; | |
1662 | } | |
1663 | ||
1664 | /* Finish deciding which character to start the next line on, | |
1665 | and what hpos to start it at. | |
1666 | Also set `lastpos' to the last position which counts as "on this line" | |
1667 | for cursor-positioning. */ | |
1668 | ||
1669 | if (pos < ZV) | |
1670 | { | |
1671 | if (FETCH_CHAR (pos) == '\n') | |
1672 | /* If stopped due to a newline, start next line after it */ | |
1673 | pos++; | |
1674 | else | |
1675 | /* Stopped due to right margin of window */ | |
1676 | { | |
1677 | if (truncate) | |
1678 | { | |
1679 | *p1++ = truncator; | |
1680 | /* Truncating => start next line after next newline, | |
1681 | and point is on this line if it is before the newline, | |
1682 | and skip none of first char of next line */ | |
1683 | pos = find_next_newline (pos, 1); | |
1684 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1685 | ||
1686 | lastpos = pos - (FETCH_CHAR (pos - 1) == '\n'); | |
1687 | } | |
1688 | else | |
1689 | { | |
1690 | *p1++ = continuer; | |
1691 | val.vpos = 0; | |
1692 | lastpos--; | |
1693 | } | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 1698 | record its frame location now. */ |
a2889657 JB |
1699 | |
1700 | if (start <= point && point <= lastpos && cursor_vpos < 0) | |
1701 | { | |
1702 | cursor_vpos = vpos; | |
1703 | cursor_hpos = p1 - startp; | |
1704 | } | |
1705 | ||
1706 | if (cursor_vpos == vpos) | |
1707 | { | |
1708 | if (cursor_hpos < 0) cursor_hpos = 0; | |
1709 | if (cursor_hpos > width) cursor_hpos = width; | |
1710 | cursor_hpos += XFASTINT (w->left); | |
44fa5b1e | 1711 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 1712 | { |
44fa5b1e JB |
1713 | FRAME_CURSOR_Y (f) = cursor_vpos; |
1714 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 JB |
1715 | |
1716 | if (w == XWINDOW (selected_window)) | |
1717 | { | |
1718 | /* Line is not continued and did not start | |
1719 | in middle of character */ | |
1720 | if ((hpos - XFASTINT (w->left) | |
1721 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
1722 | && val.vpos) | |
1723 | { | |
1724 | this_line_bufpos = start; | |
1725 | this_line_buffer = current_buffer; | |
1726 | this_line_vpos = cursor_vpos; | |
1727 | this_line_start_hpos = hpos; | |
1728 | this_line_endpos = Z - lastpos; | |
1729 | } | |
1730 | else | |
1731 | this_line_bufpos = 0; | |
1732 | } | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
1737 | if (hscroll && lastpos != start) | |
1738 | { | |
1739 | *startp = truncator; | |
1740 | if (p1 <= startp) | |
1741 | p1 = startp + 1; | |
1742 | } | |
1743 | ||
44fa5b1e | 1744 | if (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)) |
a2889657 JB |
1745 | { |
1746 | endp++; | |
1747 | if (p1 < startp) p1 = startp; | |
1748 | while (p1 < endp) *p1++ = SPACEGLYPH; | |
b1d1124b JB |
1749 | |
1750 | /* Don't draw vertical bars if we're using scrollbars. They're | |
1751 | covered up by the scrollbars, and it's distracting to see | |
1752 | them when the scrollbar windows are flickering around to be | |
1753 | reconfigured. */ | |
1754 | *p1++ = (FRAME_HAS_VERTICAL_SCROLLBARS (f) | |
1755 | ? ' ' : '|'); | |
a2889657 JB |
1756 | } |
1757 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
1758 | p1 - desired_glyphs->glyphs[vpos]); | |
1759 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
1760 | ||
1761 | /* If the start of this line is the overlay arrow-position, | |
1762 | then put the arrow string into the display-line. */ | |
1763 | ||
1764 | if (XTYPE (Voverlay_arrow_position) == Lisp_Marker | |
1765 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer | |
1766 | && start == marker_position (Voverlay_arrow_position) | |
1767 | && XTYPE (Voverlay_arrow_string) == Lisp_String | |
1768 | && ! overlay_arrow_seen) | |
1769 | { | |
1770 | unsigned char *p = XSTRING (Voverlay_arrow_string)->data; | |
1771 | int i; | |
1772 | int len = XSTRING (Voverlay_arrow_string)->size; | |
1773 | ||
b1d1124b JB |
1774 | if (len > width) |
1775 | len = width; | |
a2889657 JB |
1776 | for (i = 0; i < len; i++) |
1777 | startp[i] = p[i]; | |
1778 | if (desired_glyphs->used[vpos] < | |
1779 | (len + startp - desired_glyphs->glyphs[vpos])) | |
1780 | desired_glyphs->used[vpos] = len + startp - desired_glyphs->glyphs[vpos]; | |
1781 | ||
1782 | overlay_arrow_seen = 1; | |
1783 | } | |
1784 | ||
1785 | val.bufpos = pos; | |
1786 | val_display_text_line = val; | |
1787 | return &val_display_text_line; | |
1788 | } | |
1789 | \f | |
1790 | /* Display the mode line for window w */ | |
1791 | ||
1792 | static void | |
1793 | display_mode_line (w) | |
1794 | struct window *w; | |
1795 | { | |
1796 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
1797 | register int left = XFASTINT (w->left); | |
1798 | register int right = XFASTINT (w->width) + left; | |
44fa5b1e | 1799 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 1800 | |
44fa5b1e | 1801 | get_display_line (f, vpos, left); |
a2889657 JB |
1802 | display_mode_element (w, vpos, left, 0, right, right, |
1803 | current_buffer->mode_line_format); | |
44fa5b1e | 1804 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 JB |
1805 | |
1806 | /* Make the mode line inverse video if the entire line | |
1807 | is made of mode lines. | |
1808 | I.e. if this window is full width, | |
1809 | or if it is the child of a full width window | |
1810 | (which implies that that window is split side-by-side | |
1811 | and the rest of this line is mode lines of the sibling windows). */ | |
44fa5b1e JB |
1812 | if (XFASTINT (w->width) == FRAME_WIDTH (f) |
1813 | || XFASTINT (XWINDOW (w->parent)->width) == FRAME_WIDTH (f)) | |
1814 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
a2889657 JB |
1815 | |
1816 | #ifdef HAVE_X_WINDOWS | |
1817 | /* I'm trying this out because I saw Unimpress use it, but it's | |
0956dd96 | 1818 | possible that this may mess adversely with some window managers. -jla |
a2889657 | 1819 | |
0956dd96 JB |
1820 | Wouldn't it be nice to use something like mode-line-format to |
1821 | describe frame titles? -JimB */ | |
1822 | ||
1823 | /* Change the title of the frame to the name of the buffer displayed | |
1824 | in the currently selected window. Don't do this for minibuffer frames, | |
1825 | and don't do it when there's only one non-minibuffer frame. */ | |
22aefb49 | 1826 | if (FRAME_X_P (f) |
44fa5b1e | 1827 | && ! FRAME_MINIBUF_ONLY_P (f) |
69ced0fa | 1828 | && w == XWINDOW (f->selected_window)) |
0956dd96 JB |
1829 | x_implicitly_set_name (f, (EQ (Fnext_frame (WINDOW_FRAME (w), Qnil), |
1830 | WINDOW_FRAME (w)) | |
1831 | ? Qnil | |
1832 | : XBUFFER (w->buffer)->name), | |
11e82b76 | 1833 | Qnil); |
a2889657 JB |
1834 | #endif |
1835 | } | |
1836 | ||
1837 | /* Contribute ELT to the mode line for window W. | |
1838 | How it translates into text depends on its data type. | |
1839 | ||
1840 | VPOS is the position of the mode line being displayed. | |
1841 | ||
44fa5b1e | 1842 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
1843 | should start. The output is truncated automatically at the right |
1844 | edge of window W. | |
1845 | ||
1846 | DEPTH is the depth in recursion. It is used to prevent | |
1847 | infinite recursion here. | |
1848 | ||
1849 | MINENDCOL is the hpos before which the element may not end. | |
1850 | The element is padded at the right with spaces if nec | |
1851 | to reach this column. | |
1852 | ||
1853 | MAXENDCOL is the hpos past which this element may not extend. | |
1854 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
1855 | (This is necessary to make nested padding and truncation work.) | |
1856 | ||
1857 | Returns the hpos of the end of the text generated by ELT. | |
1858 | The next element will receive that value as its HPOS arg, | |
1859 | so as to concatenate the elements. */ | |
1860 | ||
1861 | static int | |
1862 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
1863 | struct window *w; | |
1864 | register int vpos, hpos; | |
1865 | int depth; | |
1866 | int minendcol; | |
1867 | register int maxendcol; | |
1868 | register Lisp_Object elt; | |
1869 | { | |
1870 | tail_recurse: | |
1871 | if (depth > 10) | |
1872 | goto invalid; | |
1873 | ||
1874 | depth++; | |
1875 | ||
1876 | #ifdef SWITCH_ENUM_BUG | |
1877 | switch ((int) XTYPE (elt)) | |
1878 | #else | |
1879 | switch (XTYPE (elt)) | |
1880 | #endif | |
1881 | { | |
1882 | case Lisp_String: | |
1883 | { | |
1884 | /* A string: output it and check for %-constructs within it. */ | |
1885 | register unsigned char c; | |
1886 | register unsigned char *this = XSTRING (elt)->data; | |
1887 | ||
1888 | while (hpos < maxendcol && *this) | |
1889 | { | |
1890 | unsigned char *last = this; | |
1891 | while ((c = *this++) != '\0' && c != '%') | |
1892 | ; | |
1893 | if (this - 1 != last) | |
1894 | { | |
1895 | register int lim = --this - last + hpos; | |
1896 | hpos = display_string (w, vpos, last, hpos, 0, hpos, | |
1897 | min (lim, maxendcol)); | |
1898 | } | |
1899 | else /* c == '%' */ | |
1900 | { | |
1901 | register int spec_width = 0; | |
1902 | ||
1903 | /* We can't allow -ve args due to the "%-" construct */ | |
1904 | /* Argument specifies minwidth but not maxwidth | |
1905 | (maxwidth can be specified by | |
1906 | (<negative-number> . <stuff>) mode-line elements) */ | |
1907 | ||
1908 | while ((c = *this++) >= '0' && c <= '9') | |
1909 | { | |
1910 | spec_width = spec_width * 10 + (c - '0'); | |
1911 | } | |
1912 | ||
1913 | spec_width += hpos; | |
1914 | if (spec_width > maxendcol) | |
1915 | spec_width = maxendcol; | |
1916 | ||
1917 | if (c == 'M') | |
1918 | hpos = display_mode_element (w, vpos, hpos, depth, | |
1919 | spec_width, maxendcol, | |
1920 | Vglobal_mode_string); | |
1921 | else if (c != 0) | |
1922 | hpos = display_string (w, vpos, | |
1923 | decode_mode_spec (w, c, | |
1924 | maxendcol - hpos), | |
1925 | hpos, 0, spec_width, maxendcol); | |
1926 | } | |
1927 | } | |
1928 | } | |
1929 | break; | |
1930 | ||
1931 | case Lisp_Symbol: | |
1932 | /* A symbol: process the value of the symbol recursively | |
1933 | as if it appeared here directly. Avoid error if symbol void. | |
1934 | Special case: if value of symbol is a string, output the string | |
1935 | literally. */ | |
1936 | { | |
1937 | register Lisp_Object tem; | |
1938 | tem = Fboundp (elt); | |
265a9e55 | 1939 | if (!NILP (tem)) |
a2889657 JB |
1940 | { |
1941 | tem = Fsymbol_value (elt); | |
1942 | /* If value is a string, output that string literally: | |
1943 | don't check for % within it. */ | |
1944 | if (XTYPE (tem) == Lisp_String) | |
1945 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
1946 | hpos, 0, minendcol, maxendcol); | |
1947 | /* Give up right away for nil or t. */ | |
1948 | else if (!EQ (tem, elt)) | |
1949 | { elt = tem; goto tail_recurse; } | |
1950 | } | |
1951 | } | |
1952 | break; | |
1953 | ||
1954 | case Lisp_Cons: | |
1955 | { | |
1956 | register Lisp_Object car, tem; | |
1957 | ||
1958 | /* A cons cell: three distinct cases. | |
1959 | If first element is a string or a cons, process all the elements | |
1960 | and effectively concatenate them. | |
1961 | If first element is a negative number, truncate displaying cdr to | |
1962 | at most that many characters. If positive, pad (with spaces) | |
1963 | to at least that many characters. | |
1964 | If first element is a symbol, process the cadr or caddr recursively | |
1965 | according to whether the symbol's value is non-nil or nil. */ | |
1966 | car = XCONS (elt)->car; | |
1967 | if (XTYPE (car) == Lisp_Symbol) | |
1968 | { | |
1969 | tem = Fboundp (car); | |
1970 | elt = XCONS (elt)->cdr; | |
1971 | if (XTYPE (elt) != Lisp_Cons) | |
1972 | goto invalid; | |
1973 | /* elt is now the cdr, and we know it is a cons cell. | |
1974 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 1975 | if (!NILP (tem)) |
a2889657 JB |
1976 | { |
1977 | tem = Fsymbol_value (car); | |
265a9e55 | 1978 | if (!NILP (tem)) |
a2889657 JB |
1979 | { elt = XCONS (elt)->car; goto tail_recurse; } |
1980 | } | |
1981 | /* Symbol's value is nil (or symbol is unbound) | |
1982 | Get the cddr of the original list | |
1983 | and if possible find the caddr and use that. */ | |
1984 | elt = XCONS (elt)->cdr; | |
265a9e55 | 1985 | if (NILP (elt)) |
a2889657 JB |
1986 | break; |
1987 | else if (XTYPE (elt) != Lisp_Cons) | |
1988 | goto invalid; | |
1989 | elt = XCONS (elt)->car; | |
1990 | goto tail_recurse; | |
1991 | } | |
1992 | else if (XTYPE (car) == Lisp_Int) | |
1993 | { | |
1994 | register int lim = XINT (car); | |
1995 | elt = XCONS (elt)->cdr; | |
1996 | if (lim < 0) | |
1997 | /* Negative int means reduce maximum width. | |
1998 | DO NOT change MINENDCOL here! | |
1999 | (20 -10 . foo) should truncate foo to 10 col | |
2000 | and then pad to 20. */ | |
2001 | maxendcol = min (maxendcol, hpos - lim); | |
2002 | else if (lim > 0) | |
2003 | { | |
2004 | /* Padding specified. Don't let it be more than | |
2005 | current maximum. */ | |
2006 | lim += hpos; | |
2007 | if (lim > maxendcol) | |
2008 | lim = maxendcol; | |
2009 | /* If that's more padding than already wanted, queue it. | |
2010 | But don't reduce padding already specified even if | |
2011 | that is beyond the current truncation point. */ | |
2012 | if (lim > minendcol) | |
2013 | minendcol = lim; | |
2014 | } | |
2015 | goto tail_recurse; | |
2016 | } | |
2017 | else if (XTYPE (car) == Lisp_String || XTYPE (car) == Lisp_Cons) | |
2018 | { | |
2019 | register int limit = 50; | |
2020 | /* LIMIT is to protect against circular lists. */ | |
2021 | while (XTYPE (elt) == Lisp_Cons && --limit > 0 | |
2022 | && hpos < maxendcol) | |
2023 | { | |
2024 | hpos = display_mode_element (w, vpos, hpos, depth, | |
2025 | hpos, maxendcol, | |
2026 | XCONS (elt)->car); | |
2027 | elt = XCONS (elt)->cdr; | |
2028 | } | |
2029 | } | |
2030 | } | |
2031 | break; | |
2032 | ||
2033 | default: | |
2034 | invalid: | |
2035 | return (display_string (w, vpos, "*invalid*", hpos, 0, | |
2036 | minendcol, maxendcol)); | |
2037 | } | |
2038 | ||
2039 | end: | |
2040 | if (minendcol > hpos) | |
2041 | hpos = display_string (w, vpos, "", hpos, 0, minendcol, -1); | |
2042 | return hpos; | |
2043 | } | |
2044 | \f | |
2045 | /* Return a string for the output of a mode line %-spec for window W, | |
2046 | generated by character C and width MAXWIDTH. */ | |
2047 | ||
11e82b76 JB |
2048 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
2049 | ||
a2889657 JB |
2050 | static char * |
2051 | decode_mode_spec (w, c, maxwidth) | |
2052 | struct window *w; | |
2053 | register char c; | |
2054 | register int maxwidth; | |
2055 | { | |
2056 | Lisp_Object obj = Qnil; | |
44fa5b1e JB |
2057 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2058 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
a2889657 | 2059 | |
44fa5b1e JB |
2060 | if (maxwidth > FRAME_WIDTH (f)) |
2061 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
2062 | |
2063 | switch (c) | |
2064 | { | |
2065 | case 'b': | |
2066 | obj = current_buffer->name; | |
2067 | #if 0 | |
2068 | if (maxwidth >= 3 && XSTRING (obj)->size > maxwidth) | |
2069 | { | |
2070 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
2071 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
2072 | decode_mode_spec_buf[maxwidth] = '\0'; | |
2073 | return decode_mode_spec_buf; | |
2074 | } | |
2075 | #endif | |
2076 | break; | |
2077 | ||
2078 | case 'f': | |
2079 | obj = current_buffer->filename; | |
2080 | #if 0 | |
265a9e55 | 2081 | if (NILP (obj)) |
a2889657 JB |
2082 | return "[none]"; |
2083 | else if (XTYPE (obj) == Lisp_String && XSTRING (obj)->size > maxwidth) | |
2084 | { | |
2085 | bcopy ("...", decode_mode_spec_buf, 3); | |
2086 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size - maxwidth + 3, | |
2087 | decode_mode_spec_buf + 3, maxwidth - 3); | |
2088 | return decode_mode_spec_buf; | |
2089 | } | |
2090 | #endif | |
2091 | break; | |
2092 | ||
2093 | case 'm': | |
2094 | obj = current_buffer->mode_name; | |
2095 | break; | |
2096 | ||
2097 | case 'n': | |
2098 | if (BEGV > BEG || ZV < Z) | |
2099 | return " Narrow"; | |
2100 | break; | |
2101 | ||
2102 | case '*': | |
265a9e55 | 2103 | if (!NILP (current_buffer->read_only)) |
a2889657 JB |
2104 | return "%"; |
2105 | if (MODIFF > current_buffer->save_modified) | |
2106 | return "*"; | |
2107 | return "-"; | |
2108 | ||
2109 | case 's': | |
2110 | /* status of process */ | |
a2889657 | 2111 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
265a9e55 | 2112 | if (NILP (obj)) |
a2889657 JB |
2113 | return "no process"; |
2114 | obj = Fsymbol_name (Fprocess_status (obj)); | |
2115 | break; | |
a2889657 JB |
2116 | |
2117 | case 'p': | |
2118 | { | |
2119 | int pos = marker_position (w->start); | |
2120 | int total = ZV - BEGV; | |
2121 | ||
2122 | if (XFASTINT (w->window_end_pos) <= Z - ZV) | |
2123 | { | |
2124 | if (pos <= BEGV) | |
2125 | return "All"; | |
2126 | else | |
2127 | return "Bottom"; | |
2128 | } | |
2129 | else if (pos <= BEGV) | |
2130 | return "Top"; | |
2131 | else | |
2132 | { | |
2133 | total = ((pos - BEGV) * 100 + total - 1) / total; | |
2134 | /* We can't normally display a 3-digit number, | |
2135 | so get us a 2-digit number that is close. */ | |
2136 | if (total == 100) | |
2137 | total = 99; | |
2138 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2139 | return decode_mode_spec_buf; | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | case '%': | |
2144 | return "%"; | |
2145 | ||
2146 | case '[': | |
2147 | { | |
2148 | int i; | |
2149 | char *p; | |
2150 | ||
2151 | if (command_loop_level > 5) | |
2152 | return "[[[... "; | |
2153 | p = decode_mode_spec_buf; | |
2154 | for (i = 0; i < command_loop_level; i++) | |
2155 | *p++ = '['; | |
2156 | *p = 0; | |
2157 | return decode_mode_spec_buf; | |
2158 | } | |
2159 | ||
2160 | case ']': | |
2161 | { | |
2162 | int i; | |
2163 | char *p; | |
2164 | ||
2165 | if (command_loop_level > 5) | |
2166 | return " ...]]]"; | |
2167 | p = decode_mode_spec_buf; | |
2168 | for (i = 0; i < command_loop_level; i++) | |
2169 | *p++ = ']'; | |
2170 | *p = 0; | |
2171 | return decode_mode_spec_buf; | |
2172 | } | |
2173 | ||
2174 | case '-': | |
2175 | { | |
a2889657 JB |
2176 | register char *p; |
2177 | register int i; | |
2178 | ||
2179 | if (maxwidth < sizeof (lots_of_dashes)) | |
2180 | return lots_of_dashes; | |
2181 | else | |
2182 | { | |
2183 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
2184 | *p++ = '-'; | |
2185 | *p = '\0'; | |
2186 | } | |
2187 | return decode_mode_spec_buf; | |
2188 | } | |
2189 | } | |
2190 | ||
2191 | if (XTYPE (obj) == Lisp_String) | |
2192 | return (char *) XSTRING (obj)->data; | |
2193 | else | |
2194 | return ""; | |
2195 | } | |
2196 | \f | |
2197 | /* Display STRING on one line of window W, starting at HPOS. | |
2198 | Display at position VPOS. Caller should have done get_display_line. | |
11e82b76 | 2199 | If VPOS == -1, display it as the current frame's title. |
a2889657 JB |
2200 | |
2201 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
2202 | ||
2203 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
2204 | MAXCOL is the last column ok to end at. Truncate here. | |
2205 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 2206 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
2207 | The right edge of W is an implicit maximum. |
2208 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
2209 | ||
2210 | Returns ending hpos */ | |
2211 | ||
2212 | static int | |
2213 | display_string (w, vpos, string, hpos, truncate, mincol, maxcol) | |
2214 | struct window *w; | |
2215 | unsigned char *string; | |
2216 | int vpos, hpos; | |
2217 | GLYPH truncate; | |
2218 | int mincol, maxcol; | |
2219 | { | |
2220 | register int c; | |
2221 | register GLYPH *p1; | |
2222 | int hscroll = XINT (w->hscroll); | |
253c7d2f | 2223 | int tab_width = XINT (XBUFFER (w->buffer)->tab_width); |
a2889657 JB |
2224 | register GLYPH *start; |
2225 | register GLYPH *end; | |
b1d1124b JB |
2226 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2227 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); | |
a2889657 JB |
2228 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
2229 | int window_width = XFASTINT (w->width); | |
2230 | ||
2231 | /* Use the standard display table, not the window's display table. | |
2232 | We don't want the mode line in rot13. */ | |
2233 | register struct Lisp_Vector *dp = 0; | |
2234 | ||
2235 | if (XTYPE (Vstandard_display_table) == Lisp_Vector | |
2236 | && XVECTOR (Vstandard_display_table)->size == DISP_TABLE_SIZE) | |
2237 | dp = XVECTOR (Vstandard_display_table); | |
2238 | ||
2239 | if (tab_width <= 0 || tab_width > 20) tab_width = 8; | |
2240 | ||
2241 | p1 = p1start; | |
2242 | start = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
2243 | end = start + window_width - (truncate != 0); | |
2244 | ||
b1d1124b JB |
2245 | if ((window_width + XFASTINT (w->left)) != FRAME_WIDTH (f)) |
2246 | { | |
2247 | if (FRAME_HAS_VERTICAL_SCROLLBARS (f)) | |
2248 | { | |
2249 | int i; | |
2250 | ||
2251 | for (i = 0; i < VERTICAL_SCROLLBAR_WIDTH; i++) | |
2252 | *end-- = ' '; | |
2253 | } | |
2254 | else | |
2255 | *end-- = '|'; | |
2256 | } | |
a2889657 JB |
2257 | |
2258 | if (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol) | |
2259 | end = desired_glyphs->glyphs[vpos] + maxcol; | |
2260 | if (maxcol >= 0 && mincol > maxcol) | |
2261 | mincol = maxcol; | |
2262 | ||
2263 | while (p1 < end) | |
2264 | { | |
2265 | c = *string++; | |
2266 | if (!c) break; | |
2267 | if (c >= 040 && c < 0177 | |
2268 | && (dp == 0 || XTYPE (DISP_CHAR_ROPE (dp, c)) != Lisp_String)) | |
2269 | { | |
2270 | if (p1 >= start) | |
2271 | *p1 = c; | |
2272 | p1++; | |
2273 | } | |
2274 | else if (c == '\t') | |
2275 | { | |
2276 | do | |
2277 | { | |
2278 | if (p1 >= start && p1 < end) | |
2279 | *p1 = SPACEGLYPH; | |
2280 | p1++; | |
2281 | } | |
2282 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
2283 | } | |
2284 | else if (dp != 0 && XTYPE (DISP_CHAR_ROPE (dp, c)) == Lisp_String) | |
2285 | p1 = copy_rope (p1, start, DISP_CHAR_ROPE (dp, c)); | |
ded34426 | 2286 | else if (c < 0200 && ! NILP (buffer_defaults.ctl_arrow)) |
a2889657 JB |
2287 | { |
2288 | if (p1 >= start) | |
2289 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
2290 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
2291 | p1++; | |
6e8290aa | 2292 | if (p1 >= start && p1 < end) |
a2889657 JB |
2293 | *p1 = c ^ 0100; |
2294 | p1++; | |
2295 | } | |
2296 | else | |
2297 | { | |
2298 | if (p1 >= start) | |
2299 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
2300 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
2301 | p1++; | |
6e8290aa | 2302 | if (p1 >= start && p1 < end) |
a2889657 JB |
2303 | *p1 = (c >> 6) + '0'; |
2304 | p1++; | |
6e8290aa | 2305 | if (p1 >= start && p1 < end) |
a2889657 JB |
2306 | *p1 = (7 & (c >> 3)) + '0'; |
2307 | p1++; | |
6e8290aa | 2308 | if (p1 >= start && p1 < end) |
a2889657 JB |
2309 | *p1 = (7 & c) + '0'; |
2310 | p1++; | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | if (c) | |
2315 | { | |
2316 | p1 = end; | |
2317 | if (truncate) *p1++ = truncate; | |
2318 | } | |
2319 | else if (mincol >= 0) | |
2320 | { | |
2321 | end = desired_glyphs->glyphs[vpos] + mincol; | |
2322 | while (p1 < end) | |
2323 | *p1++ = SPACEGLYPH; | |
2324 | } | |
2325 | ||
2326 | { | |
2327 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
2328 | ||
2329 | if (len > desired_glyphs->used[vpos]) | |
2330 | desired_glyphs->used[vpos] = len; | |
2331 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2332 | ||
2333 | return len; | |
2334 | } | |
2335 | } | |
2336 | \f | |
2337 | void | |
2338 | syms_of_xdisp () | |
2339 | { | |
2340 | staticpro (&last_arrow_position); | |
2341 | staticpro (&last_arrow_string); | |
2342 | last_arrow_position = Qnil; | |
2343 | last_arrow_string = Qnil; | |
2344 | ||
2345 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 2346 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
2347 | Vglobal_mode_string = Qnil; |
2348 | ||
2349 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
2350 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
2351 | This must be the beginning of a line in order to work.\n\ | |
2352 | See also `overlay-arrow-string'."); | |
2353 | Voverlay_arrow_position = Qnil; | |
2354 | ||
2355 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
2356 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
2357 | Voverlay_arrow_string = Qnil; | |
2358 | ||
2359 | DEFVAR_INT ("scroll-step", &scroll_step, | |
2360 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
2361 | If that fails to bring point back on frame, point is centered instead.\n\ |
2362 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 JB |
2363 | |
2364 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); | |
2365 | ||
2366 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
2367 | &truncate_partial_width_windows, | |
44fa5b1e | 2368 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
2369 | truncate_partial_width_windows = 1; |
2370 | ||
2371 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
2372 | "*Non-nil means use inverse video for the mode line."); | |
2373 | mode_line_inverse_video = 1; | |
a2889657 JB |
2374 | } |
2375 | ||
2376 | /* initialize the window system */ | |
2377 | init_xdisp () | |
2378 | { | |
2379 | Lisp_Object root_window; | |
2380 | #ifndef COMPILER_REGISTER_BUG | |
2381 | register | |
2382 | #endif /* COMPILER_REGISTER_BUG */ | |
2383 | struct window *mini_w; | |
2384 | ||
2385 | this_line_bufpos = 0; | |
2386 | ||
2387 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 2388 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
2389 | |
2390 | echo_area_glyphs = 0; | |
2391 | previous_echo_glyphs = 0; | |
2392 | ||
2393 | if (!noninteractive) | |
2394 | { | |
44fa5b1e | 2395 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
a2889657 | 2396 | XFASTINT (XWINDOW (root_window)->top) = 0; |
44fa5b1e JB |
2397 | set_window_height (root_window, FRAME_HEIGHT (f) - 1, 0); |
2398 | XFASTINT (mini_w->top) = FRAME_HEIGHT (f) - 1; | |
a2889657 JB |
2399 | set_window_height (minibuf_window, 1, 0); |
2400 | ||
44fa5b1e JB |
2401 | XFASTINT (XWINDOW (root_window)->width) = FRAME_WIDTH (f); |
2402 | XFASTINT (mini_w->width) = FRAME_WIDTH (f); | |
a2889657 JB |
2403 | } |
2404 | } |