Commit | Line | Data |
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a2889657 | 1 | /* Display generation from window structure and buffer text. |
de3e8b15 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1992 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 | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
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" | |
35 | ||
36 | extern int interrupt_input; | |
37 | extern int command_loop_level; | |
38 | ||
39 | /* Nonzero means print newline before next minibuffer message. */ | |
40 | ||
41 | int noninteractive_need_newline; | |
42 | ||
43 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
44 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
45 | ||
46 | /* The buffer position of the first character appearing | |
44fa5b1e JB |
47 | entirely or partially on the current frame line. |
48 | Or zero, which disables the optimization for the current frame line. */ | |
a2889657 JB |
49 | static int this_line_bufpos; |
50 | ||
51 | /* Number of characters past the end of this line, | |
52 | including the terminating newline */ | |
53 | static int this_line_endpos; | |
54 | ||
44fa5b1e | 55 | /* The vertical position of this frame line. */ |
a2889657 JB |
56 | static int this_line_vpos; |
57 | ||
44fa5b1e | 58 | /* Hpos value for start of display on this frame line. |
a2889657 JB |
59 | Usually zero, but negative if first character really began |
60 | on previous line */ | |
61 | static int this_line_start_hpos; | |
62 | ||
63 | /* Buffer that this_line variables are describing. */ | |
64 | static struct buffer *this_line_buffer; | |
65 | ||
66 | /* Set by try_window_id to the vpos of first of any lines | |
44fa5b1e | 67 | scrolled on to the bottom of the frame. These lines should |
a2889657 JB |
68 | not be included in any general scroll computation. */ |
69 | static int scroll_bottom_vpos; | |
70 | ||
71 | /* Value of echo_area_glyphs when it was last acted on. | |
44fa5b1e | 72 | If this is nonzero, there is a message on the frame |
a2889657 JB |
73 | in the minibuffer and it should be erased as soon |
74 | as it is no longer requested to appear. */ | |
75 | char *previous_echo_glyphs; | |
76 | ||
44fa5b1e | 77 | /* Nonzero means truncate lines in all windows less wide than the frame */ |
a2889657 JB |
78 | int truncate_partial_width_windows; |
79 | ||
80 | Lisp_Object Vglobal_mode_string; | |
81 | ||
82 | /* Marker for where to display an arrow on top of the buffer text. */ | |
83 | Lisp_Object Voverlay_arrow_position; | |
84 | ||
85 | /* String to display for the arrow. */ | |
86 | Lisp_Object Voverlay_arrow_string; | |
87 | ||
88 | /* Values of those variables at last redisplay. */ | |
89 | Lisp_Object last_arrow_position, last_arrow_string; | |
90 | ||
91 | /* Nonzero if overlay arrow has been displayed once in this window. */ | |
92 | static int overlay_arrow_seen; | |
93 | ||
44fa5b1e | 94 | /* If cursor motion alone moves point off frame, |
a2889657 JB |
95 | Try scrolling this many lines up or down if that will bring it back. */ |
96 | int scroll_step; | |
97 | ||
98 | /* Nonzero if try_window_id has made blank lines at window bottom | |
99 | since the last redisplay that paused */ | |
100 | static int blank_end_of_window; | |
101 | ||
102 | /* Number of windows showing the buffer of the selected window. | |
103 | keyboard.c refers to this. */ | |
104 | int buffer_shared; | |
105 | ||
44fa5b1e | 106 | /* display_text_line sets these to the frame position (origin 0) of point, |
a2889657 JB |
107 | whether the window is selected or not. |
108 | Set one to -1 first to determine whether point was found afterwards. */ | |
109 | ||
110 | static int cursor_vpos; | |
111 | static int cursor_hpos; | |
112 | ||
113 | int debug_end_pos; | |
114 | ||
115 | /* Nonzero means display mode line highlighted */ | |
116 | int mode_line_inverse_video; | |
117 | ||
118 | static void echo_area_display (); | |
119 | void mark_window_display_accurate (); | |
120 | static void redisplay_windows (); | |
121 | static void redisplay_window (); | |
122 | static void try_window (); | |
123 | static int try_window_id (); | |
124 | static struct position *display_text_line (); | |
125 | static void display_mode_line (); | |
126 | static int display_mode_element (); | |
127 | static char *fmodetrunc (); | |
128 | static char *decode_mode_spec (); | |
129 | static int display_string (); | |
130 | ||
131 | /* Prompt to display in front of the minibuffer contents */ | |
132 | char *minibuf_prompt; | |
133 | ||
134 | /* Width in columns of current minibuffer prompt. */ | |
135 | int minibuf_prompt_width; | |
136 | ||
137 | /* Message to display instead of minibuffer contents | |
138 | This is what the functions error and message make, | |
139 | and command echoing uses it as well. | |
140 | It overrides the minibuf_prompt as well as the buffer. */ | |
141 | char *echo_area_glyphs; | |
142 | ||
143 | /* true iff we should redraw the mode lines on the next redisplay */ | |
144 | int update_mode_lines; | |
145 | ||
146 | /* Smallest number of characters before the gap | |
147 | at any time since last redisplay that finished. | |
148 | Valid for current buffer when try_window_id can be called. */ | |
149 | int beg_unchanged; | |
150 | ||
151 | /* Smallest number of characters after the gap | |
152 | at any time since last redisplay that finished. | |
153 | Valid for current buffer when try_window_id can be called. */ | |
154 | int end_unchanged; | |
155 | ||
156 | /* MODIFF as of last redisplay that finished; | |
157 | if it matches MODIFF, beg_unchanged and end_unchanged | |
158 | contain no useful information */ | |
159 | int unchanged_modified; | |
160 | ||
161 | /* Nonzero if head_clip or tail_clip of current buffer has changed | |
162 | since last redisplay that finished */ | |
163 | int clip_changed; | |
164 | ||
165 | /* Nonzero if window sizes or contents have changed | |
166 | since last redisplay that finished */ | |
167 | int windows_or_buffers_changed; | |
168 | ||
169 | \f | |
44fa5b1e | 170 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print; |
9c74a0dd JB |
171 | zero if being used by message. */ |
172 | int message_buf_print; | |
173 | ||
a2889657 JB |
174 | /* dump an informative message to the minibuf */ |
175 | /* VARARGS 1 */ | |
176 | ||
177 | void | |
178 | message (m, a1, a2, a3) | |
179 | char *m; | |
180 | { | |
181 | if (noninteractive) | |
182 | { | |
183 | if (noninteractive_need_newline) | |
184 | putc ('\n', stderr); | |
185 | noninteractive_need_newline = 0; | |
186 | fprintf (stderr, m, a1, a2, a3); | |
187 | fprintf (stderr, "\n"); | |
188 | fflush (stderr); | |
189 | } | |
44fa5b1e | 190 | /* A null message buffer means that the frame hasn't really been |
8de2d90b JB |
191 | initialized yet. Error messages get reported properly by |
192 | cmd_error, so this must be just an informative message; toss it. */ | |
44fa5b1e | 193 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) |
a2889657 | 194 | { |
44fa5b1e | 195 | #ifdef MULTI_FRAME |
7253d8e0 JB |
196 | Lisp_Object minibuf_frame; |
197 | ||
44fa5b1e | 198 | choose_minibuf_frame (); |
7253d8e0 JB |
199 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); |
200 | if (FRAME_VISIBLE_P (selected_frame) | |
201 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
202 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b JB |
203 | #endif |
204 | ||
265a9e55 | 205 | { |
a2889657 | 206 | #ifdef NO_ARG_ARRAY |
265a9e55 JB |
207 | int a[3]; |
208 | a[0] = a1; | |
209 | a[1] = a2; | |
210 | a[2] = a3; | |
a2889657 | 211 | |
44fa5b1e JB |
212 | doprnt (FRAME_MESSAGE_BUF (selected_frame), |
213 | FRAME_WIDTH (selected_frame), m, 0, 3, a); | |
a2889657 | 214 | #else |
44fa5b1e JB |
215 | doprnt (FRAME_MESSAGE_BUF (selected_frame), |
216 | FRAME_WIDTH (selected_frame), m, 0, 3, &a1); | |
6e8290aa | 217 | #endif /* NO_ARG_ARRAY */ |
265a9e55 | 218 | } |
a2889657 | 219 | |
44fa5b1e | 220 | echo_area_glyphs = FRAME_MESSAGE_BUF (selected_frame); |
9c74a0dd JB |
221 | |
222 | /* Print should start at the beginning of the message | |
223 | buffer next time. */ | |
224 | message_buf_print = 0; | |
225 | ||
a2889657 JB |
226 | do_pending_window_change (); |
227 | echo_area_display (); | |
44fa5b1e | 228 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); |
a2889657 JB |
229 | do_pending_window_change (); |
230 | } | |
231 | } | |
232 | ||
233 | /* Specify m, a string, as a message in the minibuf. */ | |
234 | void | |
235 | message1 (m) | |
236 | char *m; | |
237 | { | |
a2889657 JB |
238 | if (noninteractive) |
239 | { | |
240 | if (noninteractive_need_newline) | |
241 | putc ('\n', stderr); | |
242 | noninteractive_need_newline = 0; | |
243 | fprintf (stderr, "%s\n", m); | |
244 | fflush (stderr); | |
245 | } | |
44fa5b1e | 246 | /* A null message buffer means that the frame hasn't really been |
8de2d90b JB |
247 | initialized yet. Error messages get reported properly by |
248 | cmd_error, so this must be just an informative message; toss it. */ | |
44fa5b1e | 249 | else if (INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) |
a2889657 | 250 | { |
44fa5b1e | 251 | #ifdef MULTI_FRAME |
7253d8e0 JB |
252 | Lisp_Object minibuf_frame; |
253 | ||
44fa5b1e | 254 | choose_minibuf_frame (); |
7253d8e0 JB |
255 | minibuf_frame = WINDOW_FRAME (XWINDOW (minibuf_window)); |
256 | if (FRAME_VISIBLE_P (selected_frame) | |
257 | && ! FRAME_VISIBLE_P (XFRAME (minibuf_frame))) | |
258 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b JB |
259 | #endif |
260 | ||
a2889657 JB |
261 | echo_area_glyphs = m; |
262 | do_pending_window_change (); | |
263 | echo_area_display (); | |
44fa5b1e | 264 | update_frame (XFRAME (XWINDOW (minibuf_window)->frame), 1, 1); |
a2889657 JB |
265 | do_pending_window_change (); |
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 (); | |
277 | f = XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
a2889657 | 278 | |
44fa5b1e | 279 | if (! FRAME_VISIBLE_P (f)) |
a2889657 JB |
280 | return; |
281 | #endif | |
282 | ||
44fa5b1e | 283 | if (frame_garbaged) |
a2889657 JB |
284 | { |
285 | Fredraw_display (); | |
44fa5b1e | 286 | frame_garbaged = 0; |
a2889657 JB |
287 | } |
288 | ||
289 | if (echo_area_glyphs || minibuf_level == 0) | |
290 | { | |
291 | vpos = XFASTINT (XWINDOW (minibuf_window)->top); | |
44fa5b1e | 292 | get_display_line (f, vpos, 0); |
a2889657 JB |
293 | display_string (XWINDOW (minibuf_window), vpos, |
294 | echo_area_glyphs ? echo_area_glyphs : "", | |
44fa5b1e | 295 | 0, 0, 0, FRAME_WIDTH (f)); |
a2889657 JB |
296 | |
297 | /* If desired cursor location is on this line, put it at end of text */ | |
44fa5b1e JB |
298 | if (FRAME_CURSOR_Y (f) == vpos) |
299 | FRAME_CURSOR_X (f) = FRAME_DESIRED_GLYPHS (f)->used[vpos]; | |
daa37602 JB |
300 | |
301 | /* Fill the rest of the minibuffer window with blank lines. */ | |
302 | { | |
303 | int i; | |
304 | ||
305 | for (i = vpos + 1; i < vpos + XWINDOW (minibuf_window)->height; i++) | |
306 | { | |
44fa5b1e | 307 | get_display_line (f, i, 0); |
daa37602 | 308 | display_string (XWINDOW (minibuf_window), vpos, |
44fa5b1e | 309 | "", 0, 0, 0, FRAME_WIDTH (f)); |
daa37602 JB |
310 | } |
311 | } | |
a2889657 JB |
312 | } |
313 | else if (!EQ (minibuf_window, selected_window)) | |
314 | windows_or_buffers_changed++; | |
315 | ||
316 | if (EQ (minibuf_window, selected_window)) | |
317 | this_line_bufpos = 0; | |
318 | ||
319 | previous_echo_glyphs = echo_area_glyphs; | |
320 | } | |
321 | \f | |
44fa5b1e | 322 | /* Do a frame update, taking possible shortcuts into account. |
a2889657 JB |
323 | This is the main external entry point for redisplay. |
324 | ||
325 | If the last redisplay displayed an echo area message and that | |
326 | message is no longer requested, we clear the echo area | |
327 | or bring back the minibuffer if that is in use. | |
328 | ||
329 | Everyone would like to have a hook here to call eval, | |
330 | but that cannot be done safely without a lot of changes elsewhere. | |
331 | This can be called from signal handlers; with alarms set up; | |
332 | or with synchronous processes running. | |
333 | See the function `echo' in keyboard.c. | |
334 | See Fcall_process; if you called it from here, it could be | |
335 | entered recursively. */ | |
336 | ||
337 | void | |
338 | redisplay () | |
339 | { | |
340 | register struct window *w = XWINDOW (selected_window); | |
341 | register int pause; | |
342 | int must_finish = 0; | |
343 | int all_windows; | |
344 | register int tlbufpos, tlendpos; | |
345 | struct position pos; | |
346 | extern int input_pending; | |
347 | ||
348 | if (noninteractive) | |
349 | return; | |
350 | ||
44fa5b1e | 351 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
352 | do_pending_window_change (); |
353 | ||
44fa5b1e | 354 | if (frame_garbaged) |
a2889657 JB |
355 | { |
356 | Fredraw_display (); | |
44fa5b1e | 357 | frame_garbaged = 0; |
a2889657 JB |
358 | } |
359 | ||
6e8290aa | 360 | /* Normally the message* functions will have already displayed and |
44fa5b1e | 361 | updated the echo area, but the frame may have been trashed, or |
6e8290aa JB |
362 | the update may have been preempted, so display the echo area |
363 | again here. */ | |
a2889657 JB |
364 | if (echo_area_glyphs || previous_echo_glyphs) |
365 | { | |
366 | echo_area_display (); | |
367 | must_finish = 1; | |
368 | } | |
369 | ||
370 | if (clip_changed || windows_or_buffers_changed) | |
371 | update_mode_lines++; | |
372 | ||
373 | /* Detect case that we need to write a star in the mode line. */ | |
374 | if (XFASTINT (w->last_modified) < MODIFF | |
375 | && XFASTINT (w->last_modified) <= current_buffer->save_modified) | |
376 | { | |
377 | w->update_mode_line = Qt; | |
378 | if (buffer_shared > 1) | |
379 | update_mode_lines++; | |
380 | } | |
381 | ||
44fa5b1e | 382 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 JB |
383 | |
384 | all_windows = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
385 | |
386 | /* If specs for an arrow have changed, do thorough redisplay | |
387 | to ensure we remove any arrow that should no longer exist. */ | |
388 | if (Voverlay_arrow_position != last_arrow_position | |
389 | || Voverlay_arrow_string != last_arrow_string) | |
390 | all_windows = 1, clip_changed = 1; | |
391 | ||
392 | tlbufpos = this_line_bufpos; | |
393 | tlendpos = this_line_endpos; | |
265a9e55 | 394 | if (!all_windows && tlbufpos > 0 && NILP (w->update_mode_line) |
44fa5b1e | 395 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
a2889657 JB |
396 | /* Make sure recorded data applies to current buffer, etc */ |
397 | && this_line_buffer == current_buffer | |
398 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 399 | && NILP (w->force_start) |
a2889657 JB |
400 | /* Point must be on the line that we have info recorded about */ |
401 | && point >= tlbufpos | |
402 | && point <= Z - tlendpos | |
403 | /* All text outside that line, including its final newline, | |
404 | must be unchanged */ | |
405 | && (XFASTINT (w->last_modified) >= MODIFF | |
406 | || (beg_unchanged >= tlbufpos - 1 | |
407 | && GPT >= tlbufpos | |
05ba02eb JB |
408 | /* If selective display, can't optimize |
409 | if the changes start at the beginning of the line. */ | |
410 | && ((XTYPE (current_buffer->selective_display) == Lisp_Int | |
411 | && XINT (current_buffer->selective_display) > 0 | |
412 | ? (beg_unchanged >= tlbufpos | |
413 | && GPT > tlbufpos) | |
414 | : 1)) | |
a2889657 JB |
415 | && end_unchanged >= tlendpos |
416 | && Z - GPT >= tlendpos))) | |
417 | { | |
418 | if (tlbufpos > BEGV && FETCH_CHAR (tlbufpos - 1) != '\n' | |
419 | && (tlbufpos == ZV | |
420 | || FETCH_CHAR (tlbufpos) == '\n')) | |
421 | /* Former continuation line has disappeared by becoming empty */ | |
422 | goto cancel; | |
423 | else if (XFASTINT (w->last_modified) < MODIFF | |
424 | || MINI_WINDOW_P (w)) | |
425 | { | |
426 | cursor_vpos = -1; | |
427 | overlay_arrow_seen = 0; | |
428 | display_text_line (w, tlbufpos, this_line_vpos, this_line_start_hpos, | |
429 | pos_tab_offset (w, tlbufpos)); | |
430 | /* If line contains point, is not continued, | |
431 | and ends at same distance from eob as before, we win */ | |
432 | if (cursor_vpos >= 0 && this_line_bufpos | |
433 | && this_line_endpos == tlendpos) | |
434 | { | |
44fa5b1e | 435 | if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
436 | preserve_other_columns (w); |
437 | goto update; | |
438 | } | |
439 | else | |
440 | goto cancel; | |
441 | } | |
442 | else if (point == XFASTINT (w->last_point)) | |
443 | { | |
444 | if (!must_finish) | |
445 | { | |
446 | do_pending_window_change (); | |
447 | return; | |
448 | } | |
449 | goto update; | |
450 | } | |
451 | else | |
452 | { | |
453 | pos = *compute_motion (tlbufpos, 0, | |
454 | XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0, | |
455 | point, 2, - (1 << (SHORTBITS - 1)), | |
456 | XFASTINT (w->width) - 1 | |
457 | - (XFASTINT (w->width) + XFASTINT (w->left) | |
44fa5b1e | 458 | != FRAME_WIDTH (selected_frame)), |
de3e8b15 JB |
459 | XINT (w->hscroll), |
460 | pos_tab_offset (w, tlbufpos)); | |
a2889657 JB |
461 | if (pos.vpos < 1) |
462 | { | |
44fa5b1e | 463 | FRAME_CURSOR_X (selected_frame) |
a2889657 | 464 | = XFASTINT (w->left) + max (pos.hpos, 0); |
44fa5b1e | 465 | FRAME_CURSOR_Y (selected_frame) = this_line_vpos; |
a2889657 JB |
466 | goto update; |
467 | } | |
468 | else | |
469 | goto cancel; | |
470 | } | |
471 | cancel: | |
472 | /* Text changed drastically or point moved off of line */ | |
44fa5b1e | 473 | cancel_line (this_line_vpos, selected_frame); |
a2889657 JB |
474 | } |
475 | ||
476 | this_line_bufpos = 0; | |
477 | all_windows |= buffer_shared > 1; | |
478 | ||
479 | if (all_windows) | |
480 | { | |
44fa5b1e | 481 | #ifdef MULTI_FRAME |
a2889657 JB |
482 | Lisp_Object tail; |
483 | ||
484 | /* Recompute # windows showing selected buffer. | |
8de2d90b | 485 | This will be incremented each time such a window is displayed. */ |
a2889657 JB |
486 | buffer_shared = 0; |
487 | ||
44fa5b1e | 488 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 489 | { |
44fa5b1e | 490 | FRAME_PTR f; |
a2889657 | 491 | |
44fa5b1e | 492 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
493 | continue; |
494 | ||
44fa5b1e JB |
495 | f = XFRAME (XCONS (tail)->car); |
496 | if (f->visible) | |
8de2d90b | 497 | /* Redraw its windows. */ |
44fa5b1e | 498 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
a2889657 JB |
499 | } |
500 | #else | |
44fa5b1e JB |
501 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
502 | #endif /* not MULTI_FRAME */ | |
a2889657 | 503 | } |
44fa5b1e | 504 | else if (FRAME_VISIBLE_P (selected_frame)) |
a2889657 JB |
505 | { |
506 | redisplay_window (selected_window, 1); | |
44fa5b1e | 507 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
508 | preserve_other_columns (w); |
509 | } | |
510 | ||
511 | update: | |
512 | /* Prevent various kinds of signals during display update. | |
513 | stdio is not robust about handling signals, | |
514 | which can cause an apparent I/O error. */ | |
515 | if (interrupt_input) | |
516 | unrequest_sigio (); | |
517 | stop_polling (); | |
518 | ||
44fa5b1e | 519 | #ifdef MULTI_FRAME |
a2889657 JB |
520 | if (all_windows) |
521 | { | |
522 | Lisp_Object tail; | |
523 | ||
524 | pause = 0; | |
525 | ||
44fa5b1e | 526 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 527 | { |
44fa5b1e | 528 | FRAME_PTR f; |
a2889657 | 529 | |
44fa5b1e | 530 | if (XTYPE (XCONS (tail)->car) != Lisp_Frame) |
a2889657 JB |
531 | continue; |
532 | ||
44fa5b1e JB |
533 | f = XFRAME (XCONS (tail)->car); |
534 | if (f->visible) | |
a2889657 | 535 | { |
44fa5b1e | 536 | pause |= update_frame (f, 0, 0); |
a2889657 | 537 | if (!pause) |
44fa5b1e | 538 | mark_window_display_accurate (f->root_window, 1); |
a2889657 JB |
539 | } |
540 | } | |
541 | } | |
542 | else | |
44fa5b1e | 543 | #endif /* MULTI_FRAME */ |
6e8290aa | 544 | { |
44fa5b1e JB |
545 | if (FRAME_VISIBLE_P (selected_frame)) |
546 | pause = update_frame (selected_frame, 0, 0); | |
547 | #ifdef MULTI_FRAME | |
8de2d90b | 548 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
549 | function. If the echo area is on another frame, that may |
550 | have put text on a frame other than the selected one, so the | |
551 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
552 | it here. */ |
553 | { | |
44fa5b1e JB |
554 | FRAME_PTR mini_frame = |
555 | XFRAME (WINDOW_FRAME (XWINDOW (minibuf_window))); | |
8de2d90b | 556 | |
44fa5b1e JB |
557 | if (mini_frame != selected_frame) |
558 | pause |= update_frame (mini_frame, 0, 0); | |
8de2d90b | 559 | } |
6e8290aa JB |
560 | #endif |
561 | } | |
a2889657 | 562 | |
44fa5b1e | 563 | /* If frame does not match, prevent doing single-line-update next time. |
a2889657 JB |
564 | Also, don't forget to check every line to update the arrow. */ |
565 | if (pause) | |
566 | { | |
567 | this_line_bufpos = 0; | |
265a9e55 | 568 | if (!NILP (last_arrow_position)) |
a2889657 JB |
569 | { |
570 | last_arrow_position = Qt; | |
571 | last_arrow_string = Qt; | |
572 | } | |
44fa5b1e | 573 | /* If we pause after scrolling, some lines in current_frame |
a2889657 JB |
574 | may be null, so preserve_other_columns won't be able to |
575 | preserve all the vertical-bar separators. So, avoid using it | |
576 | in that case. */ | |
44fa5b1e | 577 | if (XFASTINT (w->width) != FRAME_WIDTH (selected_frame)) |
a2889657 JB |
578 | update_mode_lines = 1; |
579 | } | |
580 | ||
44fa5b1e | 581 | /* Now text on frame agrees with windows, so |
a2889657 JB |
582 | put info into the windows for partial redisplay to follow */ |
583 | ||
584 | if (!pause) | |
585 | { | |
586 | register struct buffer *b = XBUFFER (w->buffer); | |
587 | ||
588 | blank_end_of_window = 0; | |
589 | clip_changed = 0; | |
590 | unchanged_modified = BUF_MODIFF (b); | |
591 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); | |
592 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
593 | ||
594 | XFASTINT (w->last_point) = BUF_PT (b); | |
44fa5b1e JB |
595 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (selected_frame); |
596 | XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame); | |
a2889657 JB |
597 | |
598 | if (all_windows) | |
599 | mark_window_display_accurate (XWINDOW (minibuf_window)->prev, 1); | |
600 | else | |
601 | { | |
602 | w->update_mode_line = Qnil; | |
603 | XFASTINT (w->last_modified) = BUF_MODIFF (b); | |
604 | w->window_end_valid = Qt; | |
605 | last_arrow_position = Voverlay_arrow_position; | |
606 | last_arrow_string = Voverlay_arrow_string; | |
607 | } | |
608 | update_mode_lines = 0; | |
609 | windows_or_buffers_changed = 0; | |
610 | } | |
611 | ||
612 | /* Start SIGIO interrupts coming again. | |
613 | Having them off during the code above | |
614 | makes it less likely one will discard output, | |
615 | but not impossible, since there might be stuff | |
616 | in the system buffer here. | |
617 | But it is much hairier to try to do anything about that. */ | |
618 | ||
619 | if (interrupt_input) | |
620 | request_sigio (); | |
621 | start_polling (); | |
622 | ||
44fa5b1e | 623 | /* Change frame size now if a change is pending. */ |
a2889657 JB |
624 | do_pending_window_change (); |
625 | } | |
626 | ||
627 | /* Redisplay, but leave alone any recent echo area message | |
628 | unless another message has been requested in its place. | |
629 | ||
630 | This is useful in situations where you need to redisplay but no | |
631 | user action has occurred, making it inappropriate for the message | |
632 | area to be cleared. See tracking_off and | |
633 | wait_reading_process_input for examples of these situations. */ | |
634 | ||
635 | redisplay_preserve_echo_area () | |
636 | { | |
637 | if (echo_area_glyphs == 0 && previous_echo_glyphs != 0) | |
638 | { | |
639 | echo_area_glyphs = previous_echo_glyphs; | |
640 | redisplay (); | |
641 | echo_area_glyphs = 0; | |
642 | } | |
643 | else | |
644 | redisplay (); | |
645 | } | |
646 | ||
647 | void | |
648 | mark_window_display_accurate (window, flag) | |
649 | Lisp_Object window; | |
650 | int flag; | |
651 | { | |
652 | register struct window *w; | |
653 | ||
265a9e55 | 654 | for (;!NILP (window); window = w->next) |
a2889657 JB |
655 | { |
656 | w = XWINDOW (window); | |
657 | ||
265a9e55 | 658 | if (!NILP (w->buffer)) |
a2889657 JB |
659 | XFASTINT (w->last_modified) |
660 | = !flag ? 0 | |
661 | : XBUFFER (w->buffer) == current_buffer | |
662 | ? MODIFF : BUF_MODIFF (XBUFFER (w->buffer)); | |
663 | w->window_end_valid = Qt; | |
664 | w->update_mode_line = Qnil; | |
665 | ||
265a9e55 | 666 | if (!NILP (w->vchild)) |
a2889657 | 667 | mark_window_display_accurate (w->vchild, flag); |
265a9e55 | 668 | if (!NILP (w->hchild)) |
a2889657 JB |
669 | mark_window_display_accurate (w->hchild, flag); |
670 | } | |
671 | ||
672 | if (flag) | |
673 | { | |
674 | last_arrow_position = Voverlay_arrow_position; | |
675 | last_arrow_string = Voverlay_arrow_string; | |
676 | } | |
677 | else | |
678 | { | |
679 | /* t is unequal to any useful value of Voverlay_arrow_... */ | |
680 | last_arrow_position = Qt; | |
681 | last_arrow_string = Qt; | |
682 | } | |
683 | } | |
684 | \f | |
685 | int do_id = 1; | |
686 | ||
687 | static void | |
688 | redisplay_windows (window) | |
689 | Lisp_Object window; | |
690 | { | |
265a9e55 | 691 | for (; !NILP (window); window = XWINDOW (window)->next) |
a2889657 JB |
692 | redisplay_window (window, 0); |
693 | } | |
694 | ||
695 | static void | |
696 | redisplay_window (window, just_this_one) | |
697 | Lisp_Object window; | |
698 | int just_this_one; | |
699 | { | |
700 | register struct window *w = XWINDOW (window); | |
44fa5b1e | 701 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
702 | int height; |
703 | register int lpoint = point; | |
704 | struct buffer *old = current_buffer; | |
705 | register int width = XFASTINT (w->width) - 1 | |
706 | - (XFASTINT (w->width) + XFASTINT (w->left) | |
44fa5b1e | 707 | != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))); |
a2889657 JB |
708 | register int startp; |
709 | register int hscroll = XINT (w->hscroll); | |
710 | struct position pos; | |
711 | int opoint; | |
712 | int tem; | |
713 | int window_needs_modeline; | |
714 | ||
44fa5b1e | 715 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
a2889657 JB |
716 | |
717 | /* If this is a combination window, do its children; that's all. */ | |
718 | ||
265a9e55 | 719 | if (!NILP (w->vchild)) |
a2889657 JB |
720 | { |
721 | redisplay_windows (w->vchild); | |
722 | return; | |
723 | } | |
265a9e55 | 724 | if (!NILP (w->hchild)) |
a2889657 JB |
725 | { |
726 | redisplay_windows (w->hchild); | |
727 | return; | |
728 | } | |
265a9e55 | 729 | if (NILP (w->buffer)) |
a2889657 | 730 | abort (); |
8de2d90b JB |
731 | |
732 | height = window_internal_height (w); | |
733 | ||
734 | if (MINI_WINDOW_P (w)) | |
735 | { | |
736 | if (w == XWINDOW (minibuf_window)) | |
737 | { | |
738 | if (echo_area_glyphs) | |
739 | /* We've already displayed the echo area glyphs, if any. */ | |
740 | return; | |
741 | } | |
742 | else | |
743 | { | |
744 | /* This is a minibuffer, but it's not the currently active one, so | |
745 | clear it. */ | |
44fa5b1e | 746 | int vpos = XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
8de2d90b JB |
747 | int i; |
748 | ||
749 | for (i = 0; i < height; i++) | |
750 | { | |
44fa5b1e | 751 | get_display_line (f, vpos + i, 0); |
8de2d90b JB |
752 | display_string (w, vpos + i, "", 0, 0, 0, width); |
753 | } | |
754 | ||
755 | return; | |
756 | } | |
757 | } | |
a2889657 JB |
758 | |
759 | if (update_mode_lines) | |
760 | w->update_mode_line = Qt; | |
761 | ||
762 | /* Otherwise set up data on this window; select its buffer and point value */ | |
763 | ||
a2889657 JB |
764 | current_buffer = XBUFFER (w->buffer); |
765 | opoint = point; | |
766 | ||
767 | /* Count number of windows showing the selected buffer. */ | |
768 | ||
769 | if (!just_this_one | |
770 | && current_buffer == XBUFFER (XWINDOW (selected_window)->buffer)) | |
771 | buffer_shared++; | |
772 | ||
773 | /* POINT refers normally to the selected window. | |
774 | For any other window, set up appropriate value. */ | |
775 | ||
776 | if (!EQ (window, selected_window)) | |
777 | { | |
778 | SET_PT (marker_position (w->pointm)); | |
779 | if (point < BEGV) | |
780 | { | |
265a9e55 | 781 | SET_PT (BEGV); |
a2889657 JB |
782 | Fset_marker (w->pointm, make_number (point), Qnil); |
783 | } | |
784 | else if (point > (ZV - 1)) | |
785 | { | |
265a9e55 | 786 | SET_PT (ZV); |
a2889657 JB |
787 | Fset_marker (w->pointm, make_number (point), Qnil); |
788 | } | |
789 | } | |
790 | ||
791 | /* If window-start is screwed up, choose a new one. */ | |
a2889657 JB |
792 | if (XMARKER (w->start)->buffer != current_buffer) |
793 | goto recenter; | |
794 | ||
795 | startp = marker_position (w->start); | |
796 | ||
8de2d90b JB |
797 | /* Handle case where place to start displaying has been specified, |
798 | unless the specified location is outside the visible range. */ | |
265a9e55 | 799 | if (!NILP (w->force_start)) |
a2889657 JB |
800 | { |
801 | w->update_mode_line = Qt; | |
802 | w->force_start = Qnil; | |
803 | XFASTINT (w->last_modified) = 0; | |
8de2d90b JB |
804 | if (startp < BEGV) startp = BEGV; |
805 | if (startp > ZV) startp = ZV; | |
a2889657 JB |
806 | try_window (window, startp); |
807 | if (cursor_vpos < 0) | |
808 | { | |
809 | /* If point does not appear, move point so it does appear */ | |
810 | pos = *compute_motion (startp, 0, | |
811 | ((EQ (window, minibuf_window) && startp == 1) | |
812 | ? minibuf_prompt_width : 0) | |
813 | + | |
814 | (hscroll ? 1 - hscroll : 0), | |
815 | ZV, height / 2, | |
816 | - (1 << (SHORTBITS - 1)), | |
817 | width, hscroll, pos_tab_offset (w, startp)); | |
818 | SET_PT (pos.bufpos); | |
44fa5b1e | 819 | if (w != XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
820 | Fset_marker (w->pointm, make_number (point), Qnil); |
821 | else | |
822 | { | |
823 | lpoint = point; | |
44fa5b1e JB |
824 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
825 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
826 | } |
827 | } | |
828 | goto done; | |
829 | } | |
830 | ||
831 | /* Handle case where text has not changed, only point, | |
44fa5b1e | 832 | and it has not moved off the frame */ |
a2889657 JB |
833 | |
834 | /* This code is not used for minibuffer for the sake of | |
835 | the case of redisplaying to replace an echo area message; | |
836 | since in that case the minibuffer contents per se are usually unchanged. | |
837 | This code is of no real use in the minibuffer since | |
838 | the handling of this_line_bufpos, etc., | |
839 | in redisplay handles the same cases. */ | |
840 | ||
841 | if (XFASTINT (w->last_modified) >= MODIFF | |
842 | && point >= startp && !clip_changed | |
44fa5b1e | 843 | && (just_this_one || XFASTINT (w->width) == FRAME_WIDTH (f)) |
a2889657 JB |
844 | && !EQ (window, minibuf_window)) |
845 | { | |
846 | pos = *compute_motion (startp, 0, (hscroll ? 1 - hscroll : 0), | |
847 | point, height + 1, 10000, width, hscroll, | |
848 | pos_tab_offset (w, startp)); | |
849 | ||
850 | if (pos.vpos < height) | |
851 | { | |
44fa5b1e JB |
852 | /* Ok, point is still on frame */ |
853 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) | |
a2889657 JB |
854 | { |
855 | /* These variables are supposed to be origin 1 */ | |
44fa5b1e JB |
856 | FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left); |
857 | FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top); | |
a2889657 JB |
858 | } |
859 | /* This doesn't do the trick, because if a window to the right of | |
860 | this one must be redisplayed, this does nothing because there | |
44fa5b1e | 861 | is nothing in DesiredFrame yet, and then the other window is |
a2889657 | 862 | redisplayed, making likes that are empty in this window's columns. |
44fa5b1e | 863 | if (XFASTINT (w->width) != FRAME_WIDTH (f)) |
a2889657 JB |
864 | preserve_my_columns (w); |
865 | */ | |
866 | goto done; | |
867 | } | |
868 | /* Don't bother trying redisplay with same start; | |
869 | we already know it will lose */ | |
870 | } | |
871 | /* If current starting point was originally the beginning of a line | |
872 | but no longer is, find a new starting point. */ | |
265a9e55 | 873 | else if (!NILP (w->start_at_line_beg) |
a2889657 JB |
874 | && !(startp == BEGV |
875 | || FETCH_CHAR (startp - 1) == '\n')) | |
876 | { | |
877 | goto recenter; | |
878 | } | |
879 | else if (just_this_one && !MINI_WINDOW_P (w) | |
880 | && point >= startp | |
881 | && XFASTINT (w->last_modified) | |
882 | && ! EQ (w->window_end_valid, Qnil) | |
883 | && do_id && !clip_changed | |
884 | && !blank_end_of_window | |
44fa5b1e | 885 | && XFASTINT (w->width) == FRAME_WIDTH (f) |
a2889657 JB |
886 | && EQ (last_arrow_position, Voverlay_arrow_position) |
887 | && EQ (last_arrow_string, Voverlay_arrow_string) | |
44fa5b1e | 888 | && (tem = try_window_id (FRAME_SELECTED_WINDOW (f))) |
a2889657 JB |
889 | && tem != -2) |
890 | { | |
891 | /* tem > 0 means success. tem == -1 means choose new start. | |
892 | tem == -2 means try again with same start, | |
893 | and nothing but whitespace follows the changed stuff. | |
894 | tem == 0 means try again with same start. */ | |
895 | if (tem > 0) | |
896 | goto done; | |
897 | } | |
898 | else if (startp >= BEGV && startp <= ZV | |
899 | /* Avoid starting display at end of buffer! */ | |
8de2d90b | 900 | && (startp < ZV || startp == BEGV |
a2889657 JB |
901 | || (XFASTINT (w->last_modified) >= MODIFF))) |
902 | { | |
903 | /* Try to redisplay starting at same place as before */ | |
44fa5b1e | 904 | /* If point has not moved off frame, accept the results */ |
a2889657 JB |
905 | try_window (window, startp); |
906 | if (cursor_vpos >= 0) | |
907 | goto done; | |
908 | else | |
909 | cancel_my_columns (w); | |
910 | } | |
911 | ||
912 | XFASTINT (w->last_modified) = 0; | |
913 | w->update_mode_line = Qt; | |
914 | ||
915 | /* Try to scroll by specified few lines */ | |
916 | ||
917 | if (scroll_step && !clip_changed) | |
918 | { | |
919 | if (point > startp) | |
920 | { | |
921 | pos = *vmotion (Z - XFASTINT (w->window_end_pos), | |
922 | scroll_step, width, hscroll, window); | |
923 | if (pos.vpos >= height) | |
924 | goto scroll_fail; | |
925 | } | |
926 | ||
927 | pos = *vmotion (startp, point < startp ? - scroll_step : scroll_step, | |
928 | width, hscroll, window); | |
929 | ||
930 | if (point >= pos.bufpos) | |
931 | { | |
932 | try_window (window, pos.bufpos); | |
933 | if (cursor_vpos >= 0) | |
934 | goto done; | |
935 | else | |
936 | cancel_my_columns (w); | |
937 | } | |
938 | scroll_fail: ; | |
939 | } | |
940 | ||
941 | /* Finally, just choose place to start which centers point */ | |
942 | ||
943 | recenter: | |
944 | pos = *vmotion (point, - height / 2, width, hscroll, window); | |
945 | try_window (window, pos.bufpos); | |
946 | ||
947 | startp = marker_position (w->start); | |
948 | w->start_at_line_beg = | |
949 | (startp == BEGV || FETCH_CHAR (startp - 1) == '\n') ? Qt : Qnil; | |
950 | ||
951 | done: | |
952 | /* If window not full width, must redo its mode line | |
953 | if the window to its side is being redone */ | |
265a9e55 | 954 | if ((!NILP (w->update_mode_line) |
44fa5b1e | 955 | || (!just_this_one && width < FRAME_WIDTH (f) - 1)) |
a2889657 JB |
956 | && height != XFASTINT (w->height)) |
957 | display_mode_line (w); | |
958 | ||
959 | SET_PT (opoint); | |
960 | current_buffer = old; | |
961 | SET_PT (lpoint); | |
962 | } | |
963 | \f | |
964 | /* Do full redisplay on one window, starting at position `pos'. */ | |
965 | ||
966 | static void | |
967 | try_window (window, pos) | |
968 | Lisp_Object window; | |
969 | register int pos; | |
970 | { | |
971 | register struct window *w = XWINDOW (window); | |
972 | register int height = window_internal_height (w); | |
973 | register int vpos = XFASTINT (w->top); | |
974 | register int last_text_vpos = vpos; | |
975 | int tab_offset = pos_tab_offset (w, pos); | |
44fa5b1e | 976 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 977 | int width = XFASTINT (w->width) - 1 |
44fa5b1e | 978 | - (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)); |
a2889657 JB |
979 | struct position val; |
980 | ||
981 | Fset_marker (w->start, make_number (pos), Qnil); | |
982 | cursor_vpos = -1; | |
983 | overlay_arrow_seen = 0; | |
984 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
985 | ||
986 | while (--height >= 0) | |
987 | { | |
988 | val = *display_text_line (w, pos, vpos, val.hpos, tab_offset); | |
989 | tab_offset += width; | |
990 | if (val.vpos) tab_offset = 0; | |
991 | vpos++; | |
992 | if (pos != val.bufpos) | |
993 | last_text_vpos | |
994 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
995 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
996 | pos = val.bufpos; | |
997 | } | |
998 | ||
999 | /* If last line is continued in middle of character, | |
44fa5b1e | 1000 | include the split character in the text considered on the frame */ |
a2889657 JB |
1001 | if (val.hpos < (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) |
1002 | pos++; | |
1003 | ||
44fa5b1e | 1004 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1005 | if (XFASTINT (w->window_end_pos) == 0 |
1006 | && Z != pos) | |
1007 | w->update_mode_line = Qt; | |
1008 | ||
44fa5b1e | 1009 | /* Say where last char on frame will be, once redisplay is finished. */ |
a2889657 JB |
1010 | XFASTINT (w->window_end_pos) = Z - pos; |
1011 | XFASTINT (w->window_end_vpos) = last_text_vpos - XFASTINT (w->top); | |
1012 | /* But that is not valid info until redisplay finishes. */ | |
1013 | w->window_end_valid = Qnil; | |
1014 | } | |
1015 | \f | |
1016 | /* Try to redisplay when buffer is modified locally, | |
1017 | computing insert/delete line to preserve text outside | |
1018 | the bounds of the changes. | |
1019 | Return 1 if successful, 0 if if cannot tell what to do, | |
1020 | or -1 to tell caller to find a new window start, | |
1021 | or -2 to tell caller to do normal redisplay with same window start. */ | |
1022 | ||
1023 | static int | |
1024 | try_window_id (window) | |
1025 | Lisp_Object window; | |
1026 | { | |
1027 | int pos; | |
1028 | register struct window *w = XWINDOW (window); | |
1029 | register int height = window_internal_height (w); | |
44fa5b1e | 1030 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 JB |
1031 | int top = XFASTINT (w->top); |
1032 | int start = marker_position (w->start); | |
1033 | int width = XFASTINT (w->width) - 1 | |
44fa5b1e | 1034 | - (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)); |
a2889657 JB |
1035 | int hscroll = XINT (w->hscroll); |
1036 | int lmargin = hscroll > 0 ? 1 - hscroll : 0; | |
1037 | register int vpos; | |
1038 | register int i, tem; | |
1039 | int last_text_vpos = 0; | |
1040 | int stop_vpos; | |
1041 | ||
1042 | struct position val, bp, ep, xp, pp; | |
1043 | int scroll_amount = 0; | |
1044 | int delta; | |
1045 | int tab_offset, epto; | |
1046 | ||
1047 | if (GPT - BEG < beg_unchanged) | |
1048 | beg_unchanged = GPT - BEG; | |
1049 | if (Z - GPT < end_unchanged) | |
1050 | end_unchanged = Z - GPT; | |
1051 | ||
1052 | if (beg_unchanged + 1 < start) | |
1053 | return 0; /* Give up if changes go above top of window */ | |
1054 | ||
1055 | /* Find position before which nothing is changed. */ | |
1056 | bp = *compute_motion (start, 0, lmargin, | |
f7be7f78 | 1057 | beg_unchanged + 1, height + 1, 0, width, hscroll, |
a2889657 JB |
1058 | pos_tab_offset (w, start)); |
1059 | if (bp.vpos >= height) | |
6e8290aa JB |
1060 | { |
1061 | if (point < bp.bufpos && !bp.contin) | |
1062 | { | |
44fa5b1e JB |
1063 | /* All changes are below the frame, and point is on the frame. |
1064 | We don't need to change the frame at all. | |
6e8290aa JB |
1065 | But we need to update window_end_pos to account for |
1066 | any change in buffer size. */ | |
f7be7f78 JB |
1067 | bp = *compute_motion (start, 0, lmargin, |
1068 | Z, height, 0, | |
1069 | width, hscroll, pos_tab_offset (w, start)); | |
6e8290aa JB |
1070 | XFASTINT (w->window_end_vpos) = height; |
1071 | XFASTINT (w->window_end_pos) = Z - bp.bufpos; | |
1072 | return 1; | |
1073 | } | |
1074 | return 0; | |
1075 | } | |
a2889657 JB |
1076 | |
1077 | vpos = bp.vpos; | |
1078 | ||
44fa5b1e | 1079 | /* Find beginning of that frame line. Must display from there. */ |
a2889657 JB |
1080 | bp = *vmotion (bp.bufpos, 0, width, hscroll, window); |
1081 | ||
1082 | pos = bp.bufpos; | |
1083 | val.hpos = lmargin; | |
1084 | if (pos < start) | |
1085 | return -1; | |
1086 | ||
1087 | /* If about to start displaying at the beginning of a continuation line, | |
44fa5b1e | 1088 | really start with previous frame line, in case it was not |
a2889657 | 1089 | continued when last redisplayed */ |
05ba02eb JB |
1090 | if ((bp.contin && bp.bufpos - 1 == beg_unchanged && vpos > 0) |
1091 | || | |
1092 | /* Likewise if we have to worry about selective display. */ | |
1093 | (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1094 | && XINT (current_buffer->selective_display) > 0 | |
1095 | && bp.bufpos - 1 == beg_unchanged && vpos > 0)) | |
a2889657 JB |
1096 | { |
1097 | bp = *vmotion (bp.bufpos, -1, width, hscroll, window); | |
1098 | --vpos; | |
1099 | pos = bp.bufpos; | |
1100 | } | |
1101 | ||
1102 | if (bp.contin && bp.hpos != lmargin) | |
1103 | { | |
1104 | val.hpos = bp.prevhpos - width + lmargin; | |
1105 | pos--; | |
1106 | } | |
1107 | ||
1108 | bp.vpos = vpos; | |
1109 | ||
1110 | /* Find first visible newline after which no more is changed. */ | |
1111 | tem = find_next_newline (Z - max (end_unchanged, Z - ZV), 1); | |
1112 | if (XTYPE (current_buffer->selective_display) == Lisp_Int | |
1113 | && XINT (current_buffer->selective_display) > 0) | |
1114 | while (tem < ZV - 1 | |
1115 | && (position_indentation (tem) | |
1116 | >= XINT (current_buffer->selective_display))) | |
1117 | tem = find_next_newline (tem, 1); | |
1118 | ||
1119 | /* Compute the cursor position after that newline. */ | |
1120 | ep = *compute_motion (pos, vpos, val.hpos, tem, | |
1121 | height, - (1 << (SHORTBITS - 1)), | |
1122 | width, hscroll, pos_tab_offset (w, bp.bufpos)); | |
1123 | ||
44fa5b1e JB |
1124 | /* If changes reach past the text available on the frame, |
1125 | just display rest of frame. */ | |
a2889657 JB |
1126 | if (ep.bufpos > Z - XFASTINT (w->window_end_pos)) |
1127 | stop_vpos = height; | |
1128 | else | |
1129 | stop_vpos = ep.vpos; | |
1130 | ||
1131 | /* If no newline before ep, the line ep is on includes some changes | |
1132 | that must be displayed. Make sure we don't stop before it. */ | |
1133 | /* Also, if changes reach all the way until ep.bufpos, | |
1134 | it is possible that something was deleted after the | |
1135 | newline before it, so the following line must be redrawn. */ | |
1136 | if (stop_vpos == ep.vpos | |
1137 | && (ep.bufpos == BEGV | |
1138 | || FETCH_CHAR (ep.bufpos - 1) != '\n' | |
1139 | || ep.bufpos == Z - end_unchanged)) | |
1140 | stop_vpos = ep.vpos + 1; | |
1141 | ||
1142 | cursor_vpos = -1; | |
1143 | overlay_arrow_seen = 0; | |
1144 | ||
1145 | /* If changes do not reach to bottom of window, | |
1146 | figure out how much to scroll the rest of the window */ | |
1147 | if (stop_vpos < height) | |
1148 | { | |
1149 | /* Now determine how far up or down the rest of the window has moved */ | |
1150 | epto = pos_tab_offset (w, ep.bufpos); | |
1151 | xp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1152 | Z - XFASTINT (w->window_end_pos), | |
1153 | 10000, 0, width, hscroll, epto); | |
1154 | scroll_amount = xp.vpos - XFASTINT (w->window_end_vpos); | |
1155 | ||
44fa5b1e | 1156 | /* Is everything on frame below the changes whitespace? |
a2889657 JB |
1157 | If so, no scrolling is really necessary. */ |
1158 | for (i = ep.bufpos; i < xp.bufpos; i++) | |
1159 | { | |
1160 | tem = FETCH_CHAR (i); | |
1161 | if (tem != ' ' && tem != '\n' && tem != '\t') | |
1162 | break; | |
1163 | } | |
1164 | if (i == xp.bufpos) | |
1165 | return -2; | |
1166 | ||
1167 | XFASTINT (w->window_end_vpos) += scroll_amount; | |
1168 | ||
44fa5b1e | 1169 | /* Before doing any scrolling, verify that point will be on frame. */ |
a2889657 JB |
1170 | if (point > ep.bufpos && !(point <= xp.bufpos && xp.bufpos < height)) |
1171 | { | |
1172 | if (point <= xp.bufpos) | |
1173 | { | |
1174 | pp = *compute_motion (ep.bufpos, ep.vpos, ep.hpos, | |
1175 | point, height, - (1 << (SHORTBITS - 1)), | |
1176 | width, hscroll, epto); | |
1177 | } | |
1178 | else | |
1179 | { | |
1180 | pp = *compute_motion (xp.bufpos, xp.vpos, xp.hpos, | |
1181 | point, height, - (1 << (SHORTBITS - 1)), | |
1182 | width, hscroll, pos_tab_offset (w, xp.bufpos)); | |
1183 | } | |
1184 | if (pp.bufpos < point || pp.vpos == height) | |
1185 | return 0; | |
1186 | cursor_vpos = pp.vpos + top; | |
1187 | cursor_hpos = pp.hpos + XFASTINT (w->left); | |
1188 | } | |
1189 | ||
1190 | if (stop_vpos - scroll_amount >= height | |
1191 | || ep.bufpos == xp.bufpos) | |
1192 | { | |
1193 | if (scroll_amount < 0) | |
1194 | stop_vpos -= scroll_amount; | |
1195 | scroll_amount = 0; | |
1196 | /* In this path, we have altered window_end_vpos | |
1197 | and not left it negative. | |
1198 | We must make sure that, in case display is preempted | |
44fa5b1e | 1199 | before the frame changes to reflect what we do here, |
a2889657 | 1200 | further updates will not come to try_window_id |
44fa5b1e | 1201 | and assume the frame and window_end_vpos match. */ |
a2889657 JB |
1202 | blank_end_of_window = 1; |
1203 | } | |
1204 | else if (!scroll_amount) | |
1205 | {} | |
1206 | else if (bp.bufpos == Z - end_unchanged) | |
1207 | { | |
1208 | /* If reprinting everything is nearly as fast as scrolling, | |
1209 | don't bother scrolling. Can happen if lines are short. */ | |
44fa5b1e | 1210 | if (scroll_cost (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1211 | top + height - max (0, scroll_amount), |
1212 | scroll_amount) | |
1213 | > xp.bufpos - bp.bufpos - 20) | |
1214 | /* Return "try normal display with same window-start." | |
1215 | Too bad we can't prevent further scroll-thinking. */ | |
1216 | return -2; | |
1217 | /* If pure deletion, scroll up as many lines as possible. | |
1218 | In common case of killing a line, this can save the | |
1219 | following line from being overwritten by scrolling | |
1220 | and therefore having to be redrawn. */ | |
44fa5b1e | 1221 | tem = scroll_frame_lines (f, bp.vpos + top - scroll_amount, |
a2889657 JB |
1222 | top + height - max (0, scroll_amount), |
1223 | scroll_amount); | |
1224 | if (!tem) stop_vpos = height; | |
1225 | } | |
1226 | else if (scroll_amount) | |
1227 | { | |
1228 | /* If reprinting everything is nearly as fast as scrolling, | |
1229 | don't bother scrolling. Can happen if lines are short. */ | |
1230 | /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an | |
1231 | overestimate of cost of reprinting, since xp.bufpos | |
1232 | would end up below the bottom of the window. */ | |
44fa5b1e | 1233 | if (scroll_cost (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1234 | top + height - max (0, scroll_amount), |
1235 | scroll_amount) | |
1236 | > xp.bufpos - ep.bufpos - 20) | |
1237 | /* Return "try normal display with same window-start." | |
1238 | Too bad we can't prevent further scroll-thinking. */ | |
1239 | return -2; | |
44fa5b1e | 1240 | tem = scroll_frame_lines (f, ep.vpos + top - scroll_amount, |
a2889657 JB |
1241 | top + height - max (0, scroll_amount), |
1242 | scroll_amount); | |
1243 | if (!tem) stop_vpos = height; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | /* In any case, do not display past bottom of window */ | |
1248 | if (stop_vpos >= height) | |
1249 | { | |
1250 | stop_vpos = height; | |
1251 | scroll_amount = 0; | |
1252 | } | |
1253 | ||
1254 | /* Handle case where pos is before w->start -- | |
1255 | can happen if part of line had been clipped and is not clipped now */ | |
1256 | if (vpos == 0 && pos < marker_position (w->start)) | |
1257 | Fset_marker (w->start, make_number (pos), Qnil); | |
1258 | ||
1259 | /* Redisplay the lines where the text was changed */ | |
1260 | last_text_vpos = vpos; | |
1261 | tab_offset = pos_tab_offset (w, pos); | |
1262 | /* If we are starting display in mid-character, correct tab_offset | |
1263 | to account for passing the line that that character really starts in. */ | |
1264 | if (val.hpos < lmargin) | |
1265 | tab_offset += width; | |
1266 | while (vpos < stop_vpos) | |
1267 | { | |
1268 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1269 | tab_offset += width; | |
1270 | if (val.vpos) tab_offset = 0; | |
1271 | if (pos != val.bufpos) | |
1272 | last_text_vpos | |
1273 | /* Next line, unless prev line ended in end of buffer with no cr */ | |
1274 | = vpos - (val.vpos && FETCH_CHAR (val.bufpos - 1) != '\n'); | |
1275 | pos = val.bufpos; | |
1276 | } | |
1277 | ||
1278 | /* There are two cases: | |
1279 | 1) we have displayed down to the bottom of the window | |
1280 | 2) we have scrolled lines below stop_vpos by scroll_amount */ | |
1281 | ||
1282 | if (vpos == height) | |
1283 | { | |
1284 | /* If last line is continued in middle of character, | |
44fa5b1e | 1285 | include the split character in the text considered on the frame */ |
a2889657 JB |
1286 | if (val.hpos < lmargin) |
1287 | val.bufpos++; | |
1288 | XFASTINT (w->window_end_vpos) = last_text_vpos; | |
1289 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1290 | } | |
1291 | ||
1292 | /* If scrolling made blank lines at window bottom, | |
1293 | redisplay to fill those lines */ | |
1294 | if (scroll_amount < 0) | |
1295 | { | |
1296 | /* Don't consider these lines for general-purpose scrolling. | |
1297 | That will save time in the scrolling computation. */ | |
44fa5b1e | 1298 | FRAME_SCROLL_BOTTOM_VPOS (f) = xp.vpos; |
a2889657 JB |
1299 | vpos = xp.vpos; |
1300 | pos = xp.bufpos; | |
1301 | val.hpos = lmargin; | |
1302 | if (pos == ZV) | |
1303 | vpos = height + scroll_amount; | |
1304 | else if (xp.contin && xp.hpos != lmargin) | |
1305 | { | |
1306 | val.hpos = xp.prevhpos - width + lmargin; | |
1307 | pos--; | |
1308 | } | |
1309 | ||
1310 | blank_end_of_window = 1; | |
1311 | tab_offset = pos_tab_offset (w, pos); | |
1312 | /* If we are starting display in mid-character, correct tab_offset | |
1313 | to account for passing the line that that character starts in. */ | |
1314 | if (val.hpos < lmargin) | |
1315 | tab_offset += width; | |
1316 | ||
1317 | while (vpos < height) | |
1318 | { | |
1319 | val = *display_text_line (w, pos, top + vpos++, val.hpos, tab_offset); | |
1320 | tab_offset += width; | |
1321 | if (val.vpos) tab_offset = 0; | |
1322 | pos = val.bufpos; | |
1323 | } | |
1324 | ||
1325 | /* Here is a case where display_text_line sets cursor_vpos wrong. | |
1326 | Make it be fixed up, below. */ | |
1327 | if (xp.bufpos == ZV | |
1328 | && xp.bufpos == point) | |
1329 | cursor_vpos = -1; | |
1330 | } | |
1331 | ||
44fa5b1e | 1332 | /* If bottom just moved off end of frame, change mode line percentage. */ |
a2889657 JB |
1333 | if (XFASTINT (w->window_end_pos) == 0 |
1334 | && Z != val.bufpos) | |
1335 | w->update_mode_line = Qt; | |
1336 | ||
1337 | /* Attempt to adjust end-of-text positions to new bottom line */ | |
1338 | if (scroll_amount) | |
1339 | { | |
1340 | delta = height - xp.vpos; | |
1341 | if (delta < 0 | |
1342 | || (delta > 0 && xp.bufpos <= ZV) | |
1343 | || (delta == 0 && xp.hpos)) | |
1344 | { | |
1345 | val = *vmotion (Z - XFASTINT (w->window_end_pos), | |
1346 | delta, width, hscroll, window); | |
1347 | XFASTINT (w->window_end_pos) = Z - val.bufpos; | |
1348 | XFASTINT (w->window_end_vpos) += val.vpos; | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | w->window_end_valid = Qnil; | |
1353 | ||
1354 | /* If point was not in a line that was displayed, find it */ | |
1355 | if (cursor_vpos < 0) | |
1356 | { | |
1357 | val = *compute_motion (start, 0, lmargin, point, 10000, 10000, | |
1358 | width, hscroll, pos_tab_offset (w, start)); | |
44fa5b1e | 1359 | /* Admit failure if point is off frame now */ |
a2889657 JB |
1360 | if (val.vpos >= height) |
1361 | { | |
1362 | for (vpos = 0; vpos < height; vpos++) | |
44fa5b1e | 1363 | cancel_line (vpos + top, f); |
a2889657 JB |
1364 | return 0; |
1365 | } | |
1366 | cursor_vpos = val.vpos + top; | |
1367 | cursor_hpos = val.hpos + XFASTINT (w->left); | |
1368 | } | |
1369 | ||
44fa5b1e JB |
1370 | FRAME_CURSOR_X (f) = max (0, cursor_hpos); |
1371 | FRAME_CURSOR_Y (f) = cursor_vpos; | |
a2889657 JB |
1372 | |
1373 | if (debug_end_pos) | |
1374 | { | |
1375 | val = *compute_motion (start, 0, lmargin, ZV, | |
1376 | height, - (1 << (SHORTBITS - 1)), | |
1377 | width, hscroll, pos_tab_offset (w, start)); | |
1378 | if (val.vpos != XFASTINT (w->window_end_vpos)) | |
1379 | abort (); | |
1380 | if (XFASTINT (w->window_end_pos) | |
1381 | != Z - val.bufpos) | |
1382 | abort (); | |
1383 | } | |
1384 | ||
1385 | return 1; | |
1386 | } | |
1387 | \f | |
f7430cb6 JB |
1388 | /* Copy glyphs from the rope FROM to T. |
1389 | But don't actually copy the parts that would come in before S. | |
a2889657 JB |
1390 | Value is T, advanced past the copied data. |
1391 | ||
1392 | Characters in FROM are grouped into units of `sizeof GLYPH' chars; | |
1393 | any extra chars at the end of FROM are ignored. */ | |
1394 | ||
1395 | GLYPH * | |
1396 | copy_rope (t, s, from) | |
1397 | register GLYPH *t; /* Copy to here. */ | |
1398 | register GLYPH *s; /* Starting point. */ | |
1399 | Lisp_Object from; /* Data to copy; known to be a string. */ | |
1400 | { | |
1401 | register int n = XSTRING (from)->size / sizeof (GLYPH); | |
1402 | register GLYPH *f = (GLYPH *) XSTRING (from)->data; | |
1403 | ||
1404 | while (n--) | |
1405 | { | |
1406 | if (t >= s) *t = *f; | |
1407 | ++t; | |
1408 | ++f; | |
1409 | } | |
1410 | return t; | |
1411 | } | |
1412 | \f | |
1413 | /* Display one line of window w, starting at position START in W's buffer. | |
1414 | Display starting at horizontal position HPOS, which is normally zero | |
1415 | or negative. A negative value causes output up to hpos = 0 to be discarded. | |
1416 | This is done for negative hscroll, or when this is a continuation line | |
1417 | and the continuation occurred in the middle of a multi-column character. | |
1418 | ||
1419 | TABOFFSET is an offset for ostensible hpos, used in tab stop calculations. | |
1420 | ||
44fa5b1e | 1421 | Display on position VPOS on the frame. (origin 0). |
a2889657 JB |
1422 | |
1423 | Returns a STRUCT POSITION giving character to start next line with | |
1424 | and where to display it, including a zero or negative hpos. | |
1425 | The vpos field is not really a vpos; it is 1 unless the line is continued */ | |
1426 | ||
1427 | struct position val_display_text_line; | |
1428 | ||
1429 | static struct position * | |
1430 | display_text_line (w, start, vpos, hpos, taboffset) | |
1431 | struct window *w; | |
1432 | int start; | |
1433 | int vpos; | |
1434 | int hpos; | |
1435 | int taboffset; | |
1436 | { | |
1437 | register int pos = start; | |
1438 | register int c; | |
1439 | register GLYPH *p1; | |
1440 | int end; | |
1441 | register int pause; | |
1442 | register unsigned char *p; | |
1443 | GLYPH *endp; | |
1444 | register GLYPH *startp; | |
1445 | register GLYPH *p1prev; | |
44fa5b1e | 1446 | FRAME_PTR f = XFRAME (w->frame); |
a2889657 | 1447 | int tab_width = XINT (current_buffer->tab_width); |
265a9e55 | 1448 | int ctl_arrow = !NILP (current_buffer->ctl_arrow); |
a2889657 | 1449 | int width = XFASTINT (w->width) - 1 |
44fa5b1e | 1450 | - (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)); |
a2889657 JB |
1451 | struct position val; |
1452 | int lastpos; | |
1453 | int invis; | |
1454 | int hscroll = XINT (w->hscroll); | |
1455 | int truncate = hscroll | |
1456 | || (truncate_partial_width_windows | |
44fa5b1e | 1457 | && XFASTINT (w->width) < FRAME_WIDTH (f)) |
265a9e55 | 1458 | || !NILP (current_buffer->truncate_lines); |
a2889657 JB |
1459 | int selective |
1460 | = XTYPE (current_buffer->selective_display) == Lisp_Int | |
1461 | ? XINT (current_buffer->selective_display) | |
265a9e55 | 1462 | : !NILP (current_buffer->selective_display) ? -1 : 0; |
a2889657 | 1463 | #ifndef old |
265a9e55 | 1464 | int selective_e = selective && !NILP (current_buffer->selective_display_ellipses); |
a2889657 | 1465 | #endif |
44fa5b1e | 1466 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (f); |
a2889657 JB |
1467 | register struct Lisp_Vector *dp = window_display_table (w); |
1468 | int selective_rlen | |
1469 | = (selective && dp && XTYPE (DISP_INVIS_ROPE (dp)) == Lisp_String | |
1470 | ? XSTRING (DISP_INVIS_ROPE (dp))->size / sizeof (GLYPH) : 0); | |
1471 | GLYPH truncator = (dp == 0 || XTYPE (DISP_TRUNC_GLYPH (dp)) != Lisp_Int | |
1472 | ? '$' : XINT (DISP_TRUNC_GLYPH (dp))); | |
1473 | GLYPH continuer = (dp == 0 || XTYPE (DISP_CONTINUE_GLYPH (dp)) != Lisp_Int | |
1474 | ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp))); | |
1475 | ||
1476 | hpos += XFASTINT (w->left); | |
44fa5b1e | 1477 | get_display_line (f, vpos, XFASTINT (w->left)); |
a2889657 JB |
1478 | if (tab_width <= 0 || tab_width > 20) tab_width = 8; |
1479 | ||
1480 | if (MINI_WINDOW_P (w) && start == 1 | |
1481 | && vpos == XFASTINT (w->top)) | |
1482 | { | |
1483 | if (minibuf_prompt) | |
1484 | hpos = display_string (w, vpos, minibuf_prompt, hpos, | |
1485 | (!truncate ? continuer : truncator), | |
1486 | -1, -1); | |
1487 | minibuf_prompt_width = hpos; | |
1488 | } | |
1489 | ||
1490 | desired_glyphs->bufp[vpos] = pos; | |
1491 | p1 = desired_glyphs->glyphs[vpos] + hpos; | |
1492 | end = ZV; | |
1493 | startp = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
1494 | endp = startp + width; | |
1495 | ||
1496 | /* Loop generating characters. | |
1497 | Stop at end of buffer, before newline, | |
1498 | or if reach or pass continuation column. */ | |
1499 | ||
1500 | pause = pos; | |
1501 | while (p1 < endp) | |
1502 | { | |
1503 | p1prev = p1; | |
1504 | if (pos == pause) | |
1505 | { | |
1506 | if (pos == end) | |
1507 | break; | |
1508 | if (pos == point && cursor_vpos < 0) | |
1509 | { | |
1510 | cursor_vpos = vpos; | |
1511 | cursor_hpos = p1 - startp; | |
1512 | } | |
1513 | ||
1514 | pause = end; | |
1515 | if (pos < point && point < pause) | |
1516 | pause = point; | |
1517 | if (pos < GPT && GPT < pause) | |
1518 | pause = GPT; | |
1519 | ||
1520 | p = &FETCH_CHAR (pos); | |
1521 | } | |
1522 | c = *p++; | |
1523 | if (c >= 040 && c < 0177 | |
1524 | && (dp == 0 || XTYPE (DISP_CHAR_ROPE (dp, c)) != Lisp_String)) | |
1525 | { | |
1526 | if (p1 >= startp) | |
1527 | *p1 = c; | |
1528 | p1++; | |
1529 | } | |
1530 | else if (c == '\n') | |
1531 | { | |
1532 | invis = 0; | |
1533 | while (pos < end | |
1534 | && selective > 0 | |
1535 | && position_indentation (pos + 1) >= selective) | |
1536 | { | |
1537 | invis = 1; | |
1538 | pos = find_next_newline (pos + 1, 1); | |
1539 | if (FETCH_CHAR (pos - 1) == '\n') | |
1540 | pos--; | |
1541 | } | |
1542 | if (invis && selective_rlen > 0 && p1 >= startp) | |
1543 | { | |
1544 | p1 += selective_rlen; | |
1545 | if (p1 - startp > width) | |
1546 | p1 = endp; | |
1547 | bcopy (XSTRING (DISP_INVIS_ROPE (dp))->data, p1prev, | |
1548 | (p1 - p1prev) * sizeof (GLYPH)); | |
1549 | } | |
1550 | break; | |
1551 | } | |
1552 | else if (c == '\t') | |
1553 | { | |
1554 | do | |
1555 | { | |
1556 | if (p1 >= startp && p1 < endp) | |
1557 | *p1 = SPACEGLYPH; | |
1558 | p1++; | |
1559 | } | |
1560 | while ((p1 - startp + taboffset + hscroll - (hscroll > 0)) | |
1561 | % tab_width); | |
1562 | } | |
6e8290aa | 1563 | else if (c == Ctl ('M') && selective == -1) |
a2889657 JB |
1564 | { |
1565 | pos = find_next_newline (pos, 1); | |
1566 | if (FETCH_CHAR (pos - 1) == '\n') | |
1567 | pos--; | |
1568 | if (selective_rlen > 0) | |
1569 | { | |
1570 | p1 += selective_rlen; | |
1571 | if (p1 - startp > width) | |
1572 | p1 = endp; | |
1573 | bcopy (XSTRING (DISP_INVIS_ROPE (dp))->data, p1prev, | |
1574 | (p1 - p1prev) * sizeof (GLYPH)); | |
1575 | } | |
1576 | break; | |
1577 | } | |
1578 | else if (dp != 0 && XTYPE (DISP_CHAR_ROPE (dp, c)) == Lisp_String) | |
1579 | { | |
1580 | p1 = copy_rope (p1, startp, DISP_CHAR_ROPE (dp, c)); | |
1581 | } | |
1582 | else if (c < 0200 && ctl_arrow) | |
1583 | { | |
1584 | if (p1 >= startp) | |
1585 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
1586 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
1587 | p1++; | |
6e8290aa | 1588 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1589 | *p1 = c ^ 0100; |
1590 | p1++; | |
1591 | } | |
1592 | else | |
1593 | { | |
1594 | if (p1 >= startp) | |
1595 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
1596 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
1597 | p1++; | |
6e8290aa | 1598 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1599 | *p1 = (c >> 6) + '0'; |
1600 | p1++; | |
6e8290aa | 1601 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1602 | *p1 = (7 & (c >> 3)) + '0'; |
1603 | p1++; | |
6e8290aa | 1604 | if (p1 >= startp && p1 < endp) |
a2889657 JB |
1605 | *p1 = (7 & c) + '0'; |
1606 | p1++; | |
1607 | } | |
1608 | pos++; | |
1609 | } | |
1610 | ||
1611 | val.hpos = - XINT (w->hscroll); | |
1612 | if (val.hpos) | |
1613 | val.hpos++; | |
1614 | ||
1615 | val.vpos = 1; | |
1616 | ||
1617 | lastpos = pos; | |
1618 | ||
1619 | /* Handle continuation in middle of a character */ | |
1620 | /* by backing up over it */ | |
1621 | if (p1 > endp) | |
1622 | { | |
1623 | /* Start the next line with that same character */ | |
1624 | pos--; | |
1625 | /* but at a negative hpos, to skip the columns output on this line. */ | |
1626 | val.hpos += p1prev - endp; | |
1627 | /* Keep in this line everything up to the continuation column. */ | |
1628 | p1 = endp; | |
1629 | } | |
1630 | ||
1631 | /* Finish deciding which character to start the next line on, | |
1632 | and what hpos to start it at. | |
1633 | Also set `lastpos' to the last position which counts as "on this line" | |
1634 | for cursor-positioning. */ | |
1635 | ||
1636 | if (pos < ZV) | |
1637 | { | |
1638 | if (FETCH_CHAR (pos) == '\n') | |
1639 | /* If stopped due to a newline, start next line after it */ | |
1640 | pos++; | |
1641 | else | |
1642 | /* Stopped due to right margin of window */ | |
1643 | { | |
1644 | if (truncate) | |
1645 | { | |
1646 | *p1++ = truncator; | |
1647 | /* Truncating => start next line after next newline, | |
1648 | and point is on this line if it is before the newline, | |
1649 | and skip none of first char of next line */ | |
1650 | pos = find_next_newline (pos, 1); | |
1651 | val.hpos = XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0; | |
1652 | ||
1653 | lastpos = pos - (FETCH_CHAR (pos - 1) == '\n'); | |
1654 | } | |
1655 | else | |
1656 | { | |
1657 | *p1++ = continuer; | |
1658 | val.vpos = 0; | |
1659 | lastpos--; | |
1660 | } | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* If point is at eol or in invisible text at eol, | |
44fa5b1e | 1665 | record its frame location now. */ |
a2889657 JB |
1666 | |
1667 | if (start <= point && point <= lastpos && cursor_vpos < 0) | |
1668 | { | |
1669 | cursor_vpos = vpos; | |
1670 | cursor_hpos = p1 - startp; | |
1671 | } | |
1672 | ||
1673 | if (cursor_vpos == vpos) | |
1674 | { | |
1675 | if (cursor_hpos < 0) cursor_hpos = 0; | |
1676 | if (cursor_hpos > width) cursor_hpos = width; | |
1677 | cursor_hpos += XFASTINT (w->left); | |
44fa5b1e | 1678 | if (w == XWINDOW (FRAME_SELECTED_WINDOW (f))) |
a2889657 | 1679 | { |
44fa5b1e JB |
1680 | FRAME_CURSOR_Y (f) = cursor_vpos; |
1681 | FRAME_CURSOR_X (f) = cursor_hpos; | |
a2889657 JB |
1682 | |
1683 | if (w == XWINDOW (selected_window)) | |
1684 | { | |
1685 | /* Line is not continued and did not start | |
1686 | in middle of character */ | |
1687 | if ((hpos - XFASTINT (w->left) | |
1688 | == (XINT (w->hscroll) ? 1 - XINT (w->hscroll) : 0)) | |
1689 | && val.vpos) | |
1690 | { | |
1691 | this_line_bufpos = start; | |
1692 | this_line_buffer = current_buffer; | |
1693 | this_line_vpos = cursor_vpos; | |
1694 | this_line_start_hpos = hpos; | |
1695 | this_line_endpos = Z - lastpos; | |
1696 | } | |
1697 | else | |
1698 | this_line_bufpos = 0; | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /* If hscroll and line not empty, insert truncation-at-left marker */ | |
1704 | if (hscroll && lastpos != start) | |
1705 | { | |
1706 | *startp = truncator; | |
1707 | if (p1 <= startp) | |
1708 | p1 = startp + 1; | |
1709 | } | |
1710 | ||
44fa5b1e | 1711 | if (XFASTINT (w->width) + XFASTINT (w->left) != FRAME_WIDTH (f)) |
a2889657 JB |
1712 | { |
1713 | endp++; | |
1714 | if (p1 < startp) p1 = startp; | |
1715 | while (p1 < endp) *p1++ = SPACEGLYPH; | |
1716 | *p1++ = '|'; | |
1717 | } | |
1718 | desired_glyphs->used[vpos] = max (desired_glyphs->used[vpos], | |
1719 | p1 - desired_glyphs->glyphs[vpos]); | |
1720 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
1721 | ||
1722 | /* If the start of this line is the overlay arrow-position, | |
1723 | then put the arrow string into the display-line. */ | |
1724 | ||
1725 | if (XTYPE (Voverlay_arrow_position) == Lisp_Marker | |
1726 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer | |
1727 | && start == marker_position (Voverlay_arrow_position) | |
1728 | && XTYPE (Voverlay_arrow_string) == Lisp_String | |
1729 | && ! overlay_arrow_seen) | |
1730 | { | |
1731 | unsigned char *p = XSTRING (Voverlay_arrow_string)->data; | |
1732 | int i; | |
1733 | int len = XSTRING (Voverlay_arrow_string)->size; | |
1734 | ||
1735 | if (len > XFASTINT (w->width) - 1) | |
1736 | len = XFASTINT (w->width) - 1; | |
1737 | for (i = 0; i < len; i++) | |
1738 | startp[i] = p[i]; | |
1739 | if (desired_glyphs->used[vpos] < | |
1740 | (len + startp - desired_glyphs->glyphs[vpos])) | |
1741 | desired_glyphs->used[vpos] = len + startp - desired_glyphs->glyphs[vpos]; | |
1742 | ||
1743 | overlay_arrow_seen = 1; | |
1744 | } | |
1745 | ||
1746 | val.bufpos = pos; | |
1747 | val_display_text_line = val; | |
1748 | return &val_display_text_line; | |
1749 | } | |
1750 | \f | |
1751 | /* Display the mode line for window w */ | |
1752 | ||
1753 | static void | |
1754 | display_mode_line (w) | |
1755 | struct window *w; | |
1756 | { | |
1757 | register int vpos = XFASTINT (w->height) + XFASTINT (w->top) - 1; | |
1758 | register int left = XFASTINT (w->left); | |
1759 | register int right = XFASTINT (w->width) + left; | |
44fa5b1e | 1760 | register FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
a2889657 | 1761 | |
44fa5b1e | 1762 | get_display_line (f, vpos, left); |
a2889657 JB |
1763 | display_mode_element (w, vpos, left, 0, right, right, |
1764 | current_buffer->mode_line_format); | |
44fa5b1e | 1765 | FRAME_DESIRED_GLYPHS (f)->bufp[vpos] = 0; |
a2889657 JB |
1766 | |
1767 | /* Make the mode line inverse video if the entire line | |
1768 | is made of mode lines. | |
1769 | I.e. if this window is full width, | |
1770 | or if it is the child of a full width window | |
1771 | (which implies that that window is split side-by-side | |
1772 | and the rest of this line is mode lines of the sibling windows). */ | |
44fa5b1e JB |
1773 | if (XFASTINT (w->width) == FRAME_WIDTH (f) |
1774 | || XFASTINT (XWINDOW (w->parent)->width) == FRAME_WIDTH (f)) | |
1775 | FRAME_DESIRED_GLYPHS (f)->highlight[vpos] = mode_line_inverse_video; | |
a2889657 JB |
1776 | |
1777 | #ifdef HAVE_X_WINDOWS | |
1778 | /* I'm trying this out because I saw Unimpress use it, but it's | |
8de2d90b | 1779 | possible that this may mess adversely with some window managers. jla */ |
a2889657 | 1780 | |
22aefb49 | 1781 | if (FRAME_X_P (f) |
44fa5b1e | 1782 | && ! FRAME_MINIBUF_ONLY_P (f) |
69ced0fa JB |
1783 | && w == XWINDOW (f->selected_window)) |
1784 | x_set_name (f, ((XINT (Flength (Vframe_list)) > 1) | |
1785 | ? XBUFFER (w->buffer)->name | |
1786 | : Qnil), | |
1787 | Qnil); | |
a2889657 JB |
1788 | #endif |
1789 | } | |
1790 | ||
1791 | /* Contribute ELT to the mode line for window W. | |
1792 | How it translates into text depends on its data type. | |
1793 | ||
1794 | VPOS is the position of the mode line being displayed. | |
1795 | ||
44fa5b1e | 1796 | HPOS is the position (absolute on frame) where this element's text |
a2889657 JB |
1797 | should start. The output is truncated automatically at the right |
1798 | edge of window W. | |
1799 | ||
1800 | DEPTH is the depth in recursion. It is used to prevent | |
1801 | infinite recursion here. | |
1802 | ||
1803 | MINENDCOL is the hpos before which the element may not end. | |
1804 | The element is padded at the right with spaces if nec | |
1805 | to reach this column. | |
1806 | ||
1807 | MAXENDCOL is the hpos past which this element may not extend. | |
1808 | If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority. | |
1809 | (This is necessary to make nested padding and truncation work.) | |
1810 | ||
1811 | Returns the hpos of the end of the text generated by ELT. | |
1812 | The next element will receive that value as its HPOS arg, | |
1813 | so as to concatenate the elements. */ | |
1814 | ||
1815 | static int | |
1816 | display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt) | |
1817 | struct window *w; | |
1818 | register int vpos, hpos; | |
1819 | int depth; | |
1820 | int minendcol; | |
1821 | register int maxendcol; | |
1822 | register Lisp_Object elt; | |
1823 | { | |
1824 | tail_recurse: | |
1825 | if (depth > 10) | |
1826 | goto invalid; | |
1827 | ||
1828 | depth++; | |
1829 | ||
1830 | #ifdef SWITCH_ENUM_BUG | |
1831 | switch ((int) XTYPE (elt)) | |
1832 | #else | |
1833 | switch (XTYPE (elt)) | |
1834 | #endif | |
1835 | { | |
1836 | case Lisp_String: | |
1837 | { | |
1838 | /* A string: output it and check for %-constructs within it. */ | |
1839 | register unsigned char c; | |
1840 | register unsigned char *this = XSTRING (elt)->data; | |
1841 | ||
1842 | while (hpos < maxendcol && *this) | |
1843 | { | |
1844 | unsigned char *last = this; | |
1845 | while ((c = *this++) != '\0' && c != '%') | |
1846 | ; | |
1847 | if (this - 1 != last) | |
1848 | { | |
1849 | register int lim = --this - last + hpos; | |
1850 | hpos = display_string (w, vpos, last, hpos, 0, hpos, | |
1851 | min (lim, maxendcol)); | |
1852 | } | |
1853 | else /* c == '%' */ | |
1854 | { | |
1855 | register int spec_width = 0; | |
1856 | ||
1857 | /* We can't allow -ve args due to the "%-" construct */ | |
1858 | /* Argument specifies minwidth but not maxwidth | |
1859 | (maxwidth can be specified by | |
1860 | (<negative-number> . <stuff>) mode-line elements) */ | |
1861 | ||
1862 | while ((c = *this++) >= '0' && c <= '9') | |
1863 | { | |
1864 | spec_width = spec_width * 10 + (c - '0'); | |
1865 | } | |
1866 | ||
1867 | spec_width += hpos; | |
1868 | if (spec_width > maxendcol) | |
1869 | spec_width = maxendcol; | |
1870 | ||
1871 | if (c == 'M') | |
1872 | hpos = display_mode_element (w, vpos, hpos, depth, | |
1873 | spec_width, maxendcol, | |
1874 | Vglobal_mode_string); | |
1875 | else if (c != 0) | |
1876 | hpos = display_string (w, vpos, | |
1877 | decode_mode_spec (w, c, | |
1878 | maxendcol - hpos), | |
1879 | hpos, 0, spec_width, maxendcol); | |
1880 | } | |
1881 | } | |
1882 | } | |
1883 | break; | |
1884 | ||
1885 | case Lisp_Symbol: | |
1886 | /* A symbol: process the value of the symbol recursively | |
1887 | as if it appeared here directly. Avoid error if symbol void. | |
1888 | Special case: if value of symbol is a string, output the string | |
1889 | literally. */ | |
1890 | { | |
1891 | register Lisp_Object tem; | |
1892 | tem = Fboundp (elt); | |
265a9e55 | 1893 | if (!NILP (tem)) |
a2889657 JB |
1894 | { |
1895 | tem = Fsymbol_value (elt); | |
1896 | /* If value is a string, output that string literally: | |
1897 | don't check for % within it. */ | |
1898 | if (XTYPE (tem) == Lisp_String) | |
1899 | hpos = display_string (w, vpos, XSTRING (tem)->data, | |
1900 | hpos, 0, minendcol, maxendcol); | |
1901 | /* Give up right away for nil or t. */ | |
1902 | else if (!EQ (tem, elt)) | |
1903 | { elt = tem; goto tail_recurse; } | |
1904 | } | |
1905 | } | |
1906 | break; | |
1907 | ||
1908 | case Lisp_Cons: | |
1909 | { | |
1910 | register Lisp_Object car, tem; | |
1911 | ||
1912 | /* A cons cell: three distinct cases. | |
1913 | If first element is a string or a cons, process all the elements | |
1914 | and effectively concatenate them. | |
1915 | If first element is a negative number, truncate displaying cdr to | |
1916 | at most that many characters. If positive, pad (with spaces) | |
1917 | to at least that many characters. | |
1918 | If first element is a symbol, process the cadr or caddr recursively | |
1919 | according to whether the symbol's value is non-nil or nil. */ | |
1920 | car = XCONS (elt)->car; | |
1921 | if (XTYPE (car) == Lisp_Symbol) | |
1922 | { | |
1923 | tem = Fboundp (car); | |
1924 | elt = XCONS (elt)->cdr; | |
1925 | if (XTYPE (elt) != Lisp_Cons) | |
1926 | goto invalid; | |
1927 | /* elt is now the cdr, and we know it is a cons cell. | |
1928 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 1929 | if (!NILP (tem)) |
a2889657 JB |
1930 | { |
1931 | tem = Fsymbol_value (car); | |
265a9e55 | 1932 | if (!NILP (tem)) |
a2889657 JB |
1933 | { elt = XCONS (elt)->car; goto tail_recurse; } |
1934 | } | |
1935 | /* Symbol's value is nil (or symbol is unbound) | |
1936 | Get the cddr of the original list | |
1937 | and if possible find the caddr and use that. */ | |
1938 | elt = XCONS (elt)->cdr; | |
265a9e55 | 1939 | if (NILP (elt)) |
a2889657 JB |
1940 | break; |
1941 | else if (XTYPE (elt) != Lisp_Cons) | |
1942 | goto invalid; | |
1943 | elt = XCONS (elt)->car; | |
1944 | goto tail_recurse; | |
1945 | } | |
1946 | else if (XTYPE (car) == Lisp_Int) | |
1947 | { | |
1948 | register int lim = XINT (car); | |
1949 | elt = XCONS (elt)->cdr; | |
1950 | if (lim < 0) | |
1951 | /* Negative int means reduce maximum width. | |
1952 | DO NOT change MINENDCOL here! | |
1953 | (20 -10 . foo) should truncate foo to 10 col | |
1954 | and then pad to 20. */ | |
1955 | maxendcol = min (maxendcol, hpos - lim); | |
1956 | else if (lim > 0) | |
1957 | { | |
1958 | /* Padding specified. Don't let it be more than | |
1959 | current maximum. */ | |
1960 | lim += hpos; | |
1961 | if (lim > maxendcol) | |
1962 | lim = maxendcol; | |
1963 | /* If that's more padding than already wanted, queue it. | |
1964 | But don't reduce padding already specified even if | |
1965 | that is beyond the current truncation point. */ | |
1966 | if (lim > minendcol) | |
1967 | minendcol = lim; | |
1968 | } | |
1969 | goto tail_recurse; | |
1970 | } | |
1971 | else if (XTYPE (car) == Lisp_String || XTYPE (car) == Lisp_Cons) | |
1972 | { | |
1973 | register int limit = 50; | |
1974 | /* LIMIT is to protect against circular lists. */ | |
1975 | while (XTYPE (elt) == Lisp_Cons && --limit > 0 | |
1976 | && hpos < maxendcol) | |
1977 | { | |
1978 | hpos = display_mode_element (w, vpos, hpos, depth, | |
1979 | hpos, maxendcol, | |
1980 | XCONS (elt)->car); | |
1981 | elt = XCONS (elt)->cdr; | |
1982 | } | |
1983 | } | |
1984 | } | |
1985 | break; | |
1986 | ||
1987 | default: | |
1988 | invalid: | |
1989 | return (display_string (w, vpos, "*invalid*", hpos, 0, | |
1990 | minendcol, maxendcol)); | |
1991 | } | |
1992 | ||
1993 | end: | |
1994 | if (minendcol > hpos) | |
1995 | hpos = display_string (w, vpos, "", hpos, 0, minendcol, -1); | |
1996 | return hpos; | |
1997 | } | |
1998 | \f | |
1999 | /* Return a string for the output of a mode line %-spec for window W, | |
2000 | generated by character C and width MAXWIDTH. */ | |
2001 | ||
2002 | static char * | |
2003 | decode_mode_spec (w, c, maxwidth) | |
2004 | struct window *w; | |
2005 | register char c; | |
2006 | register int maxwidth; | |
2007 | { | |
2008 | Lisp_Object obj = Qnil; | |
44fa5b1e JB |
2009 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); |
2010 | char *decode_mode_spec_buf = (char *) FRAME_TEMP_GLYPHS (f)->total_contents; | |
a2889657 | 2011 | |
44fa5b1e JB |
2012 | if (maxwidth > FRAME_WIDTH (f)) |
2013 | maxwidth = FRAME_WIDTH (f); | |
a2889657 JB |
2014 | |
2015 | switch (c) | |
2016 | { | |
2017 | case 'b': | |
2018 | obj = current_buffer->name; | |
2019 | #if 0 | |
2020 | if (maxwidth >= 3 && XSTRING (obj)->size > maxwidth) | |
2021 | { | |
2022 | bcopy (XSTRING (obj)->data, decode_mode_spec_buf, maxwidth - 1); | |
2023 | decode_mode_spec_buf[maxwidth - 1] = '\\'; | |
2024 | decode_mode_spec_buf[maxwidth] = '\0'; | |
2025 | return decode_mode_spec_buf; | |
2026 | } | |
2027 | #endif | |
2028 | break; | |
2029 | ||
2030 | case 'f': | |
2031 | obj = current_buffer->filename; | |
2032 | #if 0 | |
265a9e55 | 2033 | if (NILP (obj)) |
a2889657 JB |
2034 | return "[none]"; |
2035 | else if (XTYPE (obj) == Lisp_String && XSTRING (obj)->size > maxwidth) | |
2036 | { | |
2037 | bcopy ("...", decode_mode_spec_buf, 3); | |
2038 | bcopy (XSTRING (obj)->data + XSTRING (obj)->size - maxwidth + 3, | |
2039 | decode_mode_spec_buf + 3, maxwidth - 3); | |
2040 | return decode_mode_spec_buf; | |
2041 | } | |
2042 | #endif | |
2043 | break; | |
2044 | ||
2045 | case 'm': | |
2046 | obj = current_buffer->mode_name; | |
2047 | break; | |
2048 | ||
2049 | case 'n': | |
2050 | if (BEGV > BEG || ZV < Z) | |
2051 | return " Narrow"; | |
2052 | break; | |
2053 | ||
2054 | case '*': | |
265a9e55 | 2055 | if (!NILP (current_buffer->read_only)) |
a2889657 JB |
2056 | return "%"; |
2057 | if (MODIFF > current_buffer->save_modified) | |
2058 | return "*"; | |
2059 | return "-"; | |
2060 | ||
2061 | case 's': | |
2062 | /* status of process */ | |
a2889657 | 2063 | obj = Fget_buffer_process (Fcurrent_buffer ()); |
265a9e55 | 2064 | if (NILP (obj)) |
a2889657 JB |
2065 | return "no process"; |
2066 | obj = Fsymbol_name (Fprocess_status (obj)); | |
2067 | break; | |
a2889657 JB |
2068 | |
2069 | case 'p': | |
2070 | { | |
2071 | int pos = marker_position (w->start); | |
2072 | int total = ZV - BEGV; | |
2073 | ||
2074 | if (XFASTINT (w->window_end_pos) <= Z - ZV) | |
2075 | { | |
2076 | if (pos <= BEGV) | |
2077 | return "All"; | |
2078 | else | |
2079 | return "Bottom"; | |
2080 | } | |
2081 | else if (pos <= BEGV) | |
2082 | return "Top"; | |
2083 | else | |
2084 | { | |
2085 | total = ((pos - BEGV) * 100 + total - 1) / total; | |
2086 | /* We can't normally display a 3-digit number, | |
2087 | so get us a 2-digit number that is close. */ | |
2088 | if (total == 100) | |
2089 | total = 99; | |
2090 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
2091 | return decode_mode_spec_buf; | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | case '%': | |
2096 | return "%"; | |
2097 | ||
2098 | case '[': | |
2099 | { | |
2100 | int i; | |
2101 | char *p; | |
2102 | ||
2103 | if (command_loop_level > 5) | |
2104 | return "[[[... "; | |
2105 | p = decode_mode_spec_buf; | |
2106 | for (i = 0; i < command_loop_level; i++) | |
2107 | *p++ = '['; | |
2108 | *p = 0; | |
2109 | return decode_mode_spec_buf; | |
2110 | } | |
2111 | ||
2112 | case ']': | |
2113 | { | |
2114 | int i; | |
2115 | char *p; | |
2116 | ||
2117 | if (command_loop_level > 5) | |
2118 | return " ...]]]"; | |
2119 | p = decode_mode_spec_buf; | |
2120 | for (i = 0; i < command_loop_level; i++) | |
2121 | *p++ = ']'; | |
2122 | *p = 0; | |
2123 | return decode_mode_spec_buf; | |
2124 | } | |
2125 | ||
2126 | case '-': | |
2127 | { | |
2128 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; | |
2129 | register char *p; | |
2130 | register int i; | |
2131 | ||
2132 | if (maxwidth < sizeof (lots_of_dashes)) | |
2133 | return lots_of_dashes; | |
2134 | else | |
2135 | { | |
2136 | for (p = decode_mode_spec_buf, i = maxwidth; i > 0; i--) | |
2137 | *p++ = '-'; | |
2138 | *p = '\0'; | |
2139 | } | |
2140 | return decode_mode_spec_buf; | |
2141 | } | |
2142 | } | |
2143 | ||
2144 | if (XTYPE (obj) == Lisp_String) | |
2145 | return (char *) XSTRING (obj)->data; | |
2146 | else | |
2147 | return ""; | |
2148 | } | |
2149 | \f | |
2150 | /* Display STRING on one line of window W, starting at HPOS. | |
2151 | Display at position VPOS. Caller should have done get_display_line. | |
2152 | ||
2153 | TRUNCATE is GLYPH to display at end if truncated. Zero for none. | |
2154 | ||
2155 | MINCOL is the first column ok to end at. (Pad with spaces to this col.) | |
2156 | MAXCOL is the last column ok to end at. Truncate here. | |
2157 | -1 for MINCOL or MAXCOL means no explicit minimum or maximum. | |
44fa5b1e | 2158 | Both count from the left edge of the frame, as does HPOS. |
a2889657 JB |
2159 | The right edge of W is an implicit maximum. |
2160 | If TRUNCATE is nonzero, the implicit maximum is one column before the edge. | |
2161 | ||
2162 | Returns ending hpos */ | |
2163 | ||
2164 | static int | |
2165 | display_string (w, vpos, string, hpos, truncate, mincol, maxcol) | |
2166 | struct window *w; | |
2167 | unsigned char *string; | |
2168 | int vpos, hpos; | |
2169 | GLYPH truncate; | |
2170 | int mincol, maxcol; | |
2171 | { | |
2172 | register int c; | |
2173 | register GLYPH *p1; | |
2174 | int hscroll = XINT (w->hscroll); | |
2175 | int tab_width = XINT (current_buffer->tab_width); | |
2176 | register GLYPH *start; | |
2177 | register GLYPH *end; | |
44fa5b1e | 2178 | struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); |
a2889657 JB |
2179 | GLYPH *p1start = desired_glyphs->glyphs[vpos] + hpos; |
2180 | int window_width = XFASTINT (w->width); | |
2181 | ||
2182 | /* Use the standard display table, not the window's display table. | |
2183 | We don't want the mode line in rot13. */ | |
2184 | register struct Lisp_Vector *dp = 0; | |
2185 | ||
2186 | if (XTYPE (Vstandard_display_table) == Lisp_Vector | |
2187 | && XVECTOR (Vstandard_display_table)->size == DISP_TABLE_SIZE) | |
2188 | dp = XVECTOR (Vstandard_display_table); | |
2189 | ||
2190 | if (tab_width <= 0 || tab_width > 20) tab_width = 8; | |
2191 | ||
2192 | p1 = p1start; | |
2193 | start = desired_glyphs->glyphs[vpos] + XFASTINT (w->left); | |
2194 | end = start + window_width - (truncate != 0); | |
2195 | ||
2196 | if ((window_width + XFASTINT (w->left)) | |
44fa5b1e | 2197 | != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) |
a2889657 JB |
2198 | *end-- = '|'; |
2199 | ||
2200 | if (maxcol >= 0 && end - desired_glyphs->glyphs[vpos] > maxcol) | |
2201 | end = desired_glyphs->glyphs[vpos] + maxcol; | |
2202 | if (maxcol >= 0 && mincol > maxcol) | |
2203 | mincol = maxcol; | |
2204 | ||
2205 | while (p1 < end) | |
2206 | { | |
2207 | c = *string++; | |
2208 | if (!c) break; | |
2209 | if (c >= 040 && c < 0177 | |
2210 | && (dp == 0 || XTYPE (DISP_CHAR_ROPE (dp, c)) != Lisp_String)) | |
2211 | { | |
2212 | if (p1 >= start) | |
2213 | *p1 = c; | |
2214 | p1++; | |
2215 | } | |
2216 | else if (c == '\t') | |
2217 | { | |
2218 | do | |
2219 | { | |
2220 | if (p1 >= start && p1 < end) | |
2221 | *p1 = SPACEGLYPH; | |
2222 | p1++; | |
2223 | } | |
2224 | while ((p1 - start + hscroll - (hscroll > 0)) % tab_width); | |
2225 | } | |
2226 | else if (dp != 0 && XTYPE (DISP_CHAR_ROPE (dp, c)) == Lisp_String) | |
2227 | p1 = copy_rope (p1, start, DISP_CHAR_ROPE (dp, c)); | |
2228 | else if (c < 0200 && buffer_defaults.ctl_arrow) | |
2229 | { | |
2230 | if (p1 >= start) | |
2231 | *p1 = (dp && XTYPE (DISP_CTRL_GLYPH (dp)) == Lisp_Int | |
2232 | ? XINT (DISP_CTRL_GLYPH (dp)) : '^'); | |
2233 | p1++; | |
6e8290aa | 2234 | if (p1 >= start && p1 < end) |
a2889657 JB |
2235 | *p1 = c ^ 0100; |
2236 | p1++; | |
2237 | } | |
2238 | else | |
2239 | { | |
2240 | if (p1 >= start) | |
2241 | *p1 = (dp && XTYPE (DISP_ESCAPE_GLYPH (dp)) == Lisp_Int | |
2242 | ? XINT (DISP_ESCAPE_GLYPH (dp)) : '\\'); | |
2243 | p1++; | |
6e8290aa | 2244 | if (p1 >= start && p1 < end) |
a2889657 JB |
2245 | *p1 = (c >> 6) + '0'; |
2246 | p1++; | |
6e8290aa | 2247 | if (p1 >= start && p1 < end) |
a2889657 JB |
2248 | *p1 = (7 & (c >> 3)) + '0'; |
2249 | p1++; | |
6e8290aa | 2250 | if (p1 >= start && p1 < end) |
a2889657 JB |
2251 | *p1 = (7 & c) + '0'; |
2252 | p1++; | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | if (c) | |
2257 | { | |
2258 | p1 = end; | |
2259 | if (truncate) *p1++ = truncate; | |
2260 | } | |
2261 | else if (mincol >= 0) | |
2262 | { | |
2263 | end = desired_glyphs->glyphs[vpos] + mincol; | |
2264 | while (p1 < end) | |
2265 | *p1++ = SPACEGLYPH; | |
2266 | } | |
2267 | ||
2268 | { | |
2269 | register int len = p1 - desired_glyphs->glyphs[vpos]; | |
2270 | ||
2271 | if (len > desired_glyphs->used[vpos]) | |
2272 | desired_glyphs->used[vpos] = len; | |
2273 | desired_glyphs->glyphs[vpos][desired_glyphs->used[vpos]] = 0; | |
2274 | ||
2275 | return len; | |
2276 | } | |
2277 | } | |
2278 | \f | |
2279 | void | |
2280 | syms_of_xdisp () | |
2281 | { | |
2282 | staticpro (&last_arrow_position); | |
2283 | staticpro (&last_arrow_string); | |
2284 | last_arrow_position = Qnil; | |
2285 | last_arrow_string = Qnil; | |
2286 | ||
2287 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, | |
8c45d522 | 2288 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
2289 | Vglobal_mode_string = Qnil; |
2290 | ||
2291 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
2292 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
2293 | This must be the beginning of a line in order to work.\n\ | |
2294 | See also `overlay-arrow-string'."); | |
2295 | Voverlay_arrow_position = Qnil; | |
2296 | ||
2297 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
2298 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
2299 | Voverlay_arrow_string = Qnil; | |
2300 | ||
2301 | DEFVAR_INT ("scroll-step", &scroll_step, | |
2302 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
2303 | If that fails to bring point back on frame, point is centered instead.\n\ |
2304 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 JB |
2305 | |
2306 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); | |
2307 | ||
2308 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
2309 | &truncate_partial_width_windows, | |
44fa5b1e | 2310 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
2311 | truncate_partial_width_windows = 1; |
2312 | ||
2313 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
2314 | "*Non-nil means use inverse video for the mode line."); | |
2315 | mode_line_inverse_video = 1; | |
a2889657 JB |
2316 | } |
2317 | ||
2318 | /* initialize the window system */ | |
2319 | init_xdisp () | |
2320 | { | |
2321 | Lisp_Object root_window; | |
2322 | #ifndef COMPILER_REGISTER_BUG | |
2323 | register | |
2324 | #endif /* COMPILER_REGISTER_BUG */ | |
2325 | struct window *mini_w; | |
2326 | ||
2327 | this_line_bufpos = 0; | |
2328 | ||
2329 | mini_w = XWINDOW (minibuf_window); | |
2330 | root_window = mini_w->prev; | |
2331 | ||
2332 | echo_area_glyphs = 0; | |
2333 | previous_echo_glyphs = 0; | |
2334 | ||
2335 | if (!noninteractive) | |
2336 | { | |
44fa5b1e | 2337 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
a2889657 | 2338 | XFASTINT (XWINDOW (root_window)->top) = 0; |
44fa5b1e JB |
2339 | set_window_height (root_window, FRAME_HEIGHT (f) - 1, 0); |
2340 | XFASTINT (mini_w->top) = FRAME_HEIGHT (f) - 1; | |
a2889657 JB |
2341 | set_window_height (minibuf_window, 1, 0); |
2342 | ||
44fa5b1e JB |
2343 | XFASTINT (XWINDOW (root_window)->width) = FRAME_WIDTH (f); |
2344 | XFASTINT (mini_w->width) = FRAME_WIDTH (f); | |
a2889657 JB |
2345 | } |
2346 | } |