Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
fa61c701 JB |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1990, |
3 | 1992, 1993 Free Software Foundation, Inc. | |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 9 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
22 | #include <signal.h> | |
23 | ||
24 | #include "config.h" | |
25 | #include <stdio.h> | |
26 | #include <ctype.h> | |
27 | ||
4588ec20 JB |
28 | #include "termchar.h" |
29 | #include "termopts.h" | |
30 | #include "cm.h" | |
31 | #include "lisp.h" | |
32 | #include "dispextern.h" | |
33 | #include "buffer.h" | |
502b9b64 | 34 | #include "frame.h" |
4588ec20 JB |
35 | #include "window.h" |
36 | #include "commands.h" | |
37 | #include "disptab.h" | |
38 | #include "indent.h" | |
39 | ||
648fa17d | 40 | #include "systty.h" |
a41f8bed JB |
41 | #include "systime.h" |
42 | ||
4588ec20 JB |
43 | #ifdef HAVE_X_WINDOWS |
44 | #include "xterm.h" | |
45 | #endif /* HAVE_X_WINDOWS */ | |
46 | ||
47 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
48 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
49 | ||
50 | #ifndef PENDING_OUTPUT_COUNT | |
51 | /* Get number of chars of output now in the buffer of a stdio stream. | |
52 | This ought to be built in in stdio, but it isn't. | |
53 | Some s- files override this because their stdio internals differ. */ | |
54 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) | |
55 | #endif | |
56 | ||
a41f8bed | 57 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 58 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 59 | |
502b9b64 | 60 | int frame_garbaged; |
4588ec20 JB |
61 | |
62 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
63 | ||
64 | int display_completed; | |
65 | ||
66 | /* Lisp variable visible-bell; enables use of screen-flash | |
67 | instead of audible bell. */ | |
68 | ||
69 | int visible_bell; | |
70 | ||
502b9b64 | 71 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
72 | |
73 | int inverse_video; | |
74 | ||
75 | /* Line speed of the terminal. */ | |
76 | ||
77 | int baud_rate; | |
78 | ||
79 | /* nil or a symbol naming the window system under which emacs is | |
80 | running ('x is the only current possibility). */ | |
81 | ||
82 | Lisp_Object Vwindow_system; | |
83 | ||
84 | /* Version number of X windows: 10, 11 or nil. */ | |
85 | Lisp_Object Vwindow_system_version; | |
86 | ||
87 | /* Vector of glyph definitions. Indexed by glyph number, | |
88 | the contents are a string which is how to output the glyph. | |
89 | ||
90 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
91 | as a character code. */ | |
92 | ||
93 | Lisp_Object Vglyph_table; | |
94 | ||
95 | /* Display table to use for vectors that don't specify their own. */ | |
96 | ||
97 | Lisp_Object Vstandard_display_table; | |
98 | ||
99 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
100 | so put cursor on minibuffer after the prompt. |
101 | positive means at end of text in echo area; | |
102 | negative means at beginning of line. */ | |
4588ec20 JB |
103 | int cursor_in_echo_area; |
104 | \f | |
502b9b64 JB |
105 | /* The currently selected frame. |
106 | In a single-frame version, this variable always remains 0. */ | |
4588ec20 | 107 | |
502b9b64 | 108 | FRAME_PTR selected_frame; |
4588ec20 | 109 | |
502b9b64 JB |
110 | /* A frame which is not just a minibuffer, or 0 if there are no such |
111 | frames. This is usually the most recent such frame that was | |
112 | selected. In a single-frame version, this variable always remains 0. */ | |
113 | FRAME_PTR last_nonminibuf_frame; | |
e5d77022 | 114 | |
502b9b64 | 115 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
116 | exist inside frame objects lives in the following structure instead. |
117 | ||
118 | NOTE: the_only_frame is not checked for garbage collection; don't | |
119 | store collectable objects in any of its fields! | |
120 | ||
121 | You're not/The only frame in town/... */ | |
4588ec20 | 122 | |
502b9b64 JB |
123 | #ifndef MULTI_FRAME |
124 | struct frame the_only_frame; | |
e5d77022 | 125 | #endif |
4588ec20 JB |
126 | |
127 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
128 | which is used inside `update_frame' to hold the old contents |
129 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
130 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
131 | /* Length of vector currently allocated. */ |
132 | int ophys_lines_length; | |
133 | ||
134 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
135 | ||
136 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
137 | ||
138 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
139 | ||
4588ec20 | 140 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 141 | \f |
502b9b64 | 142 | #ifdef MULTI_FRAME |
4588ec20 | 143 | |
502b9b64 JB |
144 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
145 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
146 | (frame) | |
147 | Lisp_Object frame; | |
4588ec20 | 148 | { |
502b9b64 | 149 | FRAME_PTR f; |
4588ec20 | 150 | |
502b9b64 JB |
151 | CHECK_LIVE_FRAME (frame, 0); |
152 | f = XFRAME (frame); | |
153 | update_begin (f); | |
4588ec20 | 154 | /* set_terminal_modes (); */ |
502b9b64 | 155 | clear_frame (); |
b6a65ac2 | 156 | clear_frame_records (f); |
502b9b64 | 157 | update_end (f); |
4588ec20 | 158 | fflush (stdout); |
4588ec20 JB |
159 | windows_or_buffers_changed++; |
160 | /* Mark all windows as INaccurate, | |
161 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
162 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
163 | f->garbaged = 0; | |
4588ec20 JB |
164 | return Qnil; |
165 | } | |
166 | ||
167 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
9d0d777c | 168 | "Clear and redisplay all visible frames.") |
4588ec20 JB |
169 | () |
170 | { | |
502b9b64 | 171 | Lisp_Object frame, tail; |
4588ec20 | 172 | |
502b9b64 | 173 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
4588ec20 | 174 | { |
502b9b64 | 175 | frame = XCONS (tail)->car; |
7bc18990 | 176 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
502b9b64 | 177 | Fredraw_frame (frame); |
4588ec20 JB |
178 | } |
179 | return Qnil; | |
180 | } | |
181 | ||
502b9b64 JB |
182 | redraw_frame (f) |
183 | FRAME_PTR f; | |
4588ec20 | 184 | { |
502b9b64 JB |
185 | Lisp_Object frame; |
186 | XSET (frame, Lisp_Frame, f); | |
187 | Fredraw_frame (frame); | |
4588ec20 JB |
188 | } |
189 | ||
502b9b64 | 190 | #else /* not MULTI_FRAME */ |
4588ec20 | 191 | |
7bc18990 | 192 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
4588ec20 JB |
193 | "Clear screen and output again what is supposed to appear on it.") |
194 | () | |
195 | { | |
196 | update_begin (0); | |
197 | set_terminal_modes (); | |
502b9b64 | 198 | clear_frame (); |
4588ec20 JB |
199 | update_end (0); |
200 | fflush (stdout); | |
502b9b64 | 201 | clear_frame_records (0); |
4588ec20 JB |
202 | windows_or_buffers_changed++; |
203 | /* Mark all windows as INaccurate, | |
204 | so that every window will have its redisplay done. */ | |
b5c685f4 | 205 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
206 | return Qnil; |
207 | } | |
208 | ||
502b9b64 | 209 | #endif /* not MULTI_FRAME */ |
4588ec20 | 210 | \f |
502b9b64 JB |
211 | static struct frame_glyphs * |
212 | make_frame_glyphs (frame, empty) | |
213 | register FRAME_PTR frame; | |
4588ec20 JB |
214 | int empty; |
215 | { | |
216 | register int i; | |
502b9b64 JB |
217 | register width = FRAME_WIDTH (frame); |
218 | register height = FRAME_HEIGHT (frame); | |
219 | register struct frame_glyphs *new = | |
220 | (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 221 | |
502b9b64 | 222 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
223 | new->height = height; |
224 | new->width = width; | |
225 | new->used = (int *) xmalloc (height * sizeof (int)); | |
226 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
227 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
228 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
229 | bzero (new->enable, height * sizeof (char)); | |
230 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
231 | ||
232 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 233 | if (FRAME_X_P (frame)) |
4588ec20 | 234 | { |
4588ec20 JB |
235 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
236 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
237 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
238 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 239 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
240 | } |
241 | #endif | |
242 | ||
243 | if (empty) | |
244 | { | |
245 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 246 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 JB |
247 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
248 | ||
249 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
250 | bzero (new->total_contents, total_glyphs); | |
251 | } | |
252 | else | |
253 | { | |
254 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
255 | ||
256 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
257 | bzero (new->total_contents, total_glyphs); | |
258 | for (i = 0; i < height; i++) | |
259 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
260 | } | |
261 | ||
262 | return new; | |
263 | } | |
264 | ||
265 | static void | |
502b9b64 JB |
266 | free_frame_glyphs (frame, glyphs) |
267 | FRAME_PTR frame; | |
268 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
269 | { |
270 | if (glyphs->total_contents) | |
271 | free (glyphs->total_contents); | |
272 | ||
273 | free (glyphs->used); | |
274 | free (glyphs->glyphs); | |
275 | free (glyphs->highlight); | |
276 | free (glyphs->enable); | |
277 | free (glyphs->bufp); | |
278 | ||
279 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 280 | if (FRAME_X_P (frame)) |
4588ec20 | 281 | { |
4588ec20 JB |
282 | free (glyphs->top_left_x); |
283 | free (glyphs->top_left_y); | |
284 | free (glyphs->pix_width); | |
285 | free (glyphs->pix_height); | |
448fd7c0 | 286 | free (glyphs->max_ascent); |
4588ec20 JB |
287 | } |
288 | #endif | |
289 | ||
290 | free (glyphs); | |
291 | } | |
292 | ||
293 | static void | |
502b9b64 JB |
294 | remake_frame_glyphs (frame) |
295 | FRAME_PTR frame; | |
4588ec20 | 296 | { |
502b9b64 JB |
297 | if (FRAME_CURRENT_GLYPHS (frame)) |
298 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
299 | if (FRAME_DESIRED_GLYPHS (frame)) | |
300 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
301 | if (FRAME_TEMP_GLYPHS (frame)) | |
302 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
303 | ||
304 | if (FRAME_MESSAGE_BUF (frame)) | |
305 | FRAME_MESSAGE_BUF (frame) | |
306 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
307 | FRAME_WIDTH (frame) + 1); | |
4588ec20 | 308 | else |
502b9b64 JB |
309 | FRAME_MESSAGE_BUF (frame) |
310 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 311 | |
502b9b64 JB |
312 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
313 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
314 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
315 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
316 | } |
317 | \f | |
502b9b64 | 318 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
319 | |
320 | static int | |
321 | line_hash_code (m, vpos) | |
502b9b64 | 322 | register struct frame_glyphs *m; |
4588ec20 JB |
323 | int vpos; |
324 | { | |
325 | register GLYPH *body, *end; | |
326 | register int h = 0; | |
327 | ||
328 | if (!m->enable[vpos]) | |
329 | return 0; | |
330 | ||
94aa5d2d | 331 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
332 | so as to encourage scrolling to leave them in place. */ |
333 | if (m->highlight[vpos]) | |
334 | return -1; | |
335 | ||
336 | body = m->glyphs[vpos]; | |
337 | ||
338 | if (must_write_spaces) | |
339 | while (1) | |
340 | { | |
341 | GLYPH g = *body++; | |
342 | ||
343 | if (g == 0) | |
344 | break; | |
345 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
346 | } | |
347 | else | |
348 | while (1) | |
349 | { | |
350 | GLYPH g = *body++; | |
351 | ||
352 | if (g == 0) | |
353 | break; | |
354 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
355 | } | |
356 | ||
357 | if (h) | |
358 | return h; | |
359 | return 1; | |
360 | } | |
361 | ||
362 | /* Return number of characters in line in M at vpos VPOS, | |
363 | except don't count leading and trailing spaces | |
364 | unless the terminal requires those to be explicitly output. */ | |
365 | ||
366 | static unsigned int | |
367 | line_draw_cost (m, vpos) | |
502b9b64 | 368 | struct frame_glyphs *m; |
4588ec20 JB |
369 | int vpos; |
370 | { | |
371 | register GLYPH *beg = m->glyphs[vpos]; | |
372 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
373 | register int i; | |
374 | register int tlen = GLYPH_TABLE_LENGTH; | |
375 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
376 | ||
377 | /* Ignore trailing and leading spaces if we can. */ | |
378 | if (!must_write_spaces) | |
379 | { | |
380 | while ((end != beg) && (*end == SPACEGLYPH)) | |
381 | --end; | |
382 | if (end == beg) | |
383 | return (0); /* All blank line. */ | |
384 | ||
385 | while (*beg == SPACEGLYPH) | |
386 | ++beg; | |
387 | } | |
388 | ||
389 | /* If we don't have a glyph-table, each glyph is one character, | |
390 | so return the number of glyphs. */ | |
391 | if (tbase == 0) | |
392 | return end - beg; | |
393 | ||
394 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
395 | i = 0; | |
396 | while ((beg <= end) && *beg) | |
397 | { | |
398 | register GLYPH g = *beg++; | |
399 | ||
400 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
401 | i += 1; | |
402 | else | |
403 | i += GLYPH_LENGTH (tbase, g); | |
404 | } | |
405 | return i; | |
406 | } | |
407 | \f | |
408 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
409 | ||
410 | The only other interface into redisplay is through setting | |
502b9b64 JB |
411 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
412 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
413 | |
414 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
415 | ||
502b9b64 | 416 | cancel_line (vpos, frame) |
4588ec20 | 417 | int vpos; |
502b9b64 | 418 | register FRAME_PTR frame; |
4588ec20 | 419 | { |
502b9b64 | 420 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
421 | } |
422 | ||
502b9b64 JB |
423 | clear_frame_records (frame) |
424 | register FRAME_PTR frame; | |
4588ec20 | 425 | { |
502b9b64 | 426 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
427 | } |
428 | ||
429 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
430 | ||
431 | void | |
502b9b64 JB |
432 | get_display_line (frame, vpos, hpos) |
433 | register FRAME_PTR frame; | |
4588ec20 JB |
434 | int vpos; |
435 | register int hpos; | |
436 | { | |
502b9b64 JB |
437 | register struct frame_glyphs *glyphs; |
438 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
439 | register GLYPH *p; |
440 | ||
7c3c72ec | 441 | if (vpos < 0) |
4588ec20 JB |
442 | abort (); |
443 | ||
444 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
445 | abort (); | |
446 | ||
447 | if (! desired_glyphs->enable[vpos]) | |
448 | { | |
449 | desired_glyphs->used[vpos] = 0; | |
450 | desired_glyphs->highlight[vpos] = 0; | |
451 | desired_glyphs->enable[vpos] = 1; | |
452 | } | |
453 | ||
454 | if (hpos > desired_glyphs->used[vpos]) | |
455 | { | |
456 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
457 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
458 | ||
459 | desired_glyphs->used[vpos] = hpos; | |
460 | while (g != end) | |
461 | *g++ = SPACEGLYPH; | |
462 | } | |
463 | } | |
464 | ||
465 | /* Like bcopy except never gets confused by overlap. */ | |
466 | ||
467 | void | |
468 | safe_bcopy (from, to, size) | |
469 | char *from, *to; | |
470 | int size; | |
471 | { | |
b5c685f4 | 472 | if (size <= 0 || from == to) |
4588ec20 JB |
473 | return; |
474 | ||
b5c685f4 JB |
475 | /* If the source and destination don't overlap, then bcopy can |
476 | handle it. If they do overlap, but the destination is lower in | |
477 | memory than the source, we'll assume bcopy can handle that. */ | |
478 | if (to < from || from + size <= to) | |
479 | bcopy (from, to, size); | |
480 | ||
481 | /* Otherwise, we'll copy from the end. */ | |
482 | else | |
4588ec20 | 483 | { |
b5c685f4 JB |
484 | register char *endf = from + size; |
485 | register char *endt = to + size; | |
4588ec20 JB |
486 | |
487 | /* If TO - FROM is large, then we should break the copy into | |
488 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
489 | TO - FROM is small, then the bcopy function call overhead | |
490 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
491 | anywhere. Since I don't think the obvious copy loop is too |
492 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
493 | if (to - from < 64) |
494 | { | |
495 | do | |
496 | *--endt = *--endf; | |
497 | while (endf != from); | |
498 | } | |
499 | else | |
500 | { | |
b5c685f4 | 501 | for (;;) |
4588ec20 JB |
502 | { |
503 | endt -= (to - from); | |
504 | endf -= (to - from); | |
505 | ||
b5c685f4 JB |
506 | if (endt < to) |
507 | break; | |
508 | ||
4588ec20 JB |
509 | bcopy (endf, endt, to - from); |
510 | } | |
b5c685f4 JB |
511 | |
512 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
513 | little left over. The amount left over is |
514 | (endt + (to - from)) - to, which is endt - from. */ | |
515 | bcopy (from, to, endt - from); | |
516 | } | |
517 | } | |
4588ec20 JB |
518 | } |
519 | ||
98038dc0 | 520 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
521 | DISTANCE may be negative. */ |
522 | ||
523 | static void | |
524 | rotate_vector (vector, size, distance) | |
525 | char *vector; | |
526 | int size; | |
527 | int distance; | |
528 | { | |
529 | char *temp = (char *) alloca (size); | |
530 | ||
531 | if (distance < 0) | |
532 | distance += size; | |
533 | ||
534 | bcopy (vector, temp + distance, size - distance); | |
535 | bcopy (vector + size - distance, temp, distance); | |
536 | bcopy (temp, vector, size); | |
537 | } | |
538 | ||
539 | /* Scroll lines from vpos FROM up to but not including vpos END | |
540 | down by AMOUNT lines (AMOUNT may be negative). | |
541 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
542 | ||
543 | int | |
502b9b64 JB |
544 | scroll_frame_lines (frame, from, end, amount) |
545 | register FRAME_PTR frame; | |
4588ec20 JB |
546 | int from, end, amount; |
547 | { | |
548 | register int i; | |
502b9b64 JB |
549 | register struct frame_glyphs *current_frame |
550 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
551 | |
552 | if (!line_ins_del_ok) | |
553 | return 0; | |
554 | ||
555 | if (amount == 0) | |
556 | return 1; | |
557 | ||
558 | if (amount > 0) | |
559 | { | |
502b9b64 | 560 | update_begin (frame); |
4588ec20 JB |
561 | set_terminal_window (end + amount); |
562 | if (!scroll_region_ok) | |
563 | ins_del_lines (end, -amount); | |
564 | ins_del_lines (from, amount); | |
565 | set_terminal_window (0); | |
566 | ||
502b9b64 | 567 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
568 | sizeof (GLYPH *) * (end + amount - from), |
569 | amount * sizeof (GLYPH *)); | |
570 | ||
502b9b64 JB |
571 | safe_bcopy (current_frame->used + from, |
572 | current_frame->used + from + amount, | |
573 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 574 | |
502b9b64 JB |
575 | safe_bcopy (current_frame->highlight + from, |
576 | current_frame->highlight + from + amount, | |
577 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 578 | |
502b9b64 JB |
579 | safe_bcopy (current_frame->enable + from, |
580 | current_frame->enable + from + amount, | |
581 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
582 | |
583 | /* Mark the lines made empty by scrolling as enabled, empty and | |
584 | normal video. */ | |
502b9b64 JB |
585 | bzero (current_frame->used + from, |
586 | amount * sizeof current_frame->used[0]); | |
587 | bzero (current_frame->highlight + from, | |
588 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
589 | for (i = from; i < from + amount; i++) |
590 | { | |
502b9b64 JB |
591 | current_frame->glyphs[i][0] = '\0'; |
592 | current_frame->enable[i] = 1; | |
4588ec20 JB |
593 | } |
594 | ||
502b9b64 JB |
595 | safe_bcopy (current_frame->bufp + from, |
596 | current_frame->bufp + from + amount, | |
597 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
598 | |
599 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 600 | if (FRAME_X_P (frame)) |
4588ec20 | 601 | { |
502b9b64 JB |
602 | safe_bcopy (current_frame->top_left_x + from, |
603 | current_frame->top_left_x + from + amount, | |
604 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 605 | |
502b9b64 JB |
606 | safe_bcopy (current_frame->top_left_y + from, |
607 | current_frame->top_left_y + from + amount, | |
608 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 609 | |
502b9b64 JB |
610 | safe_bcopy (current_frame->pix_width + from, |
611 | current_frame->pix_width + from + amount, | |
612 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 613 | |
502b9b64 JB |
614 | safe_bcopy (current_frame->pix_height + from, |
615 | current_frame->pix_height + from + amount, | |
616 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
617 | |
618 | safe_bcopy (current_frame->max_ascent + from, | |
619 | current_frame->max_ascent + from + amount, | |
620 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
621 | } |
622 | #endif /* HAVE_X_WINDOWS */ | |
623 | ||
502b9b64 | 624 | update_end (frame); |
4588ec20 JB |
625 | } |
626 | if (amount < 0) | |
627 | { | |
502b9b64 | 628 | update_begin (frame); |
4588ec20 JB |
629 | set_terminal_window (end); |
630 | ins_del_lines (from + amount, amount); | |
631 | if (!scroll_region_ok) | |
632 | ins_del_lines (end + amount, -amount); | |
633 | set_terminal_window (0); | |
634 | ||
502b9b64 | 635 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
636 | sizeof (GLYPH *) * (end - from - amount), |
637 | amount * sizeof (GLYPH *)); | |
638 | ||
502b9b64 JB |
639 | safe_bcopy (current_frame->used + from, |
640 | current_frame->used + from + amount, | |
641 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 642 | |
502b9b64 JB |
643 | safe_bcopy (current_frame->highlight + from, |
644 | current_frame->highlight + from + amount, | |
645 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 646 | |
502b9b64 JB |
647 | safe_bcopy (current_frame->enable + from, |
648 | current_frame->enable + from + amount, | |
649 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
650 | |
651 | /* Mark the lines made empty by scrolling as enabled, empty and | |
652 | normal video. */ | |
502b9b64 JB |
653 | bzero (current_frame->used + end + amount, |
654 | - amount * sizeof current_frame->used[0]); | |
655 | bzero (current_frame->highlight + end + amount, | |
656 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
657 | for (i = end + amount; i < end; i++) |
658 | { | |
502b9b64 JB |
659 | current_frame->glyphs[i][0] = '\0'; |
660 | current_frame->enable[i] = 1; | |
4588ec20 JB |
661 | } |
662 | ||
502b9b64 JB |
663 | safe_bcopy (current_frame->bufp + from, |
664 | current_frame->bufp + from + amount, | |
665 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
666 | |
667 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 668 | if (FRAME_X_P (frame)) |
4588ec20 | 669 | { |
502b9b64 JB |
670 | safe_bcopy (current_frame->top_left_x + from, |
671 | current_frame->top_left_x + from + amount, | |
672 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 673 | |
502b9b64 JB |
674 | safe_bcopy (current_frame->top_left_y + from, |
675 | current_frame->top_left_y + from + amount, | |
676 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 677 | |
502b9b64 JB |
678 | safe_bcopy (current_frame->pix_width + from, |
679 | current_frame->pix_width + from + amount, | |
680 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 681 | |
502b9b64 JB |
682 | safe_bcopy (current_frame->pix_height + from, |
683 | current_frame->pix_height + from + amount, | |
684 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
685 | |
686 | safe_bcopy (current_frame->max_ascent + from, | |
687 | current_frame->max_ascent + from + amount, | |
688 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
689 | } |
690 | #endif /* HAVE_X_WINDOWS */ | |
691 | ||
502b9b64 | 692 | update_end (frame); |
4588ec20 JB |
693 | } |
694 | return 1; | |
695 | } | |
696 | \f | |
502b9b64 | 697 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 698 | copy all the columns that W does not occupy |
502b9b64 JB |
699 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
700 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
701 | |
702 | preserve_other_columns (w) | |
703 | struct window *w; | |
704 | { | |
705 | register int vpos; | |
502b9b64 JB |
706 | register struct frame_glyphs *current_frame, *desired_frame; |
707 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
708 | int start = XFASTINT (w->left); |
709 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
710 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
711 | ||
502b9b64 JB |
712 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
713 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
714 | |
715 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
716 | { | |
502b9b64 | 717 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
718 | { |
719 | if (start > 0) | |
720 | { | |
721 | int len; | |
722 | ||
502b9b64 JB |
723 | bcopy (current_frame->glyphs[vpos], |
724 | desired_frame->glyphs[vpos], start); | |
725 | len = min (start, current_frame->used[vpos]); | |
726 | if (desired_frame->used[vpos] < len) | |
727 | desired_frame->used[vpos] = len; | |
4588ec20 | 728 | } |
502b9b64 JB |
729 | if (current_frame->used[vpos] > end |
730 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 731 | { |
502b9b64 JB |
732 | while (desired_frame->used[vpos] < end) |
733 | desired_frame->glyphs[vpos][desired_frame->used[vpos]++] | |
4588ec20 | 734 | = SPACEGLYPH; |
502b9b64 JB |
735 | bcopy (current_frame->glyphs[vpos] + end, |
736 | desired_frame->glyphs[vpos] + end, | |
737 | current_frame->used[vpos] - end); | |
738 | desired_frame->used[vpos] = current_frame->used[vpos]; | |
4588ec20 JB |
739 | } |
740 | } | |
741 | } | |
742 | } | |
743 | \f | |
744 | #if 0 | |
745 | ||
502b9b64 | 746 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 747 | copy all the columns that w does occupy |
502b9b64 JB |
748 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
749 | so that update_frame will not change those columns. | |
4588ec20 JB |
750 | |
751 | Have not been able to figure out how to use this correctly. */ | |
752 | ||
753 | preserve_my_columns (w) | |
754 | struct window *w; | |
755 | { | |
756 | register int vpos, fin; | |
502b9b64 JB |
757 | register struct frame_glyphs *l1, *l2; |
758 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
759 | int start = XFASTINT (w->left); |
760 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
761 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
762 | ||
763 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
764 | { | |
502b9b64 JB |
765 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
766 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
767 | { |
768 | if (l2->length > start && l1->length < l2->length) | |
769 | { | |
770 | fin = l2->length; | |
771 | if (fin > end) fin = end; | |
772 | while (l1->length < start) | |
773 | l1->body[l1->length++] = ' '; | |
774 | bcopy (l2->body + start, l1->body + start, fin - start); | |
775 | l1->length = fin; | |
776 | } | |
777 | } | |
778 | } | |
779 | } | |
780 | ||
781 | #endif | |
782 | \f | |
783 | /* On discovering that the redisplay for a window was no good, | |
784 | cancel the columns of that window, so that when the window is | |
785 | displayed over again get_display_line will not complain. */ | |
786 | ||
787 | cancel_my_columns (w) | |
788 | struct window *w; | |
789 | { | |
790 | register int vpos; | |
502b9b64 JB |
791 | register struct frame_glyphs *desired_glyphs = |
792 | FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
793 | register int start = XFASTINT (w->left); |
794 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
795 | ||
796 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
797 | if (desired_glyphs->enable[vpos] | |
798 | && desired_glyphs->used[vpos] >= start) | |
799 | desired_glyphs->used[vpos] = start; | |
800 | } | |
801 | \f | |
502b9b64 | 802 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
803 | the necessary output for one change in the buffer. |
804 | They may return 0 meaning nothing was done if anything is difficult, | |
805 | or 1 meaning the output was performed properly. | |
502b9b64 | 806 | They assume that the frame was up to date before the buffer |
94aa5d2d | 807 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
808 | see command_loop_1 where these are called. */ |
809 | ||
810 | int | |
811 | direct_output_for_insert (g) | |
812 | int g; | |
813 | { | |
502b9b64 JB |
814 | register FRAME_PTR frame = selected_frame; |
815 | register struct frame_glyphs *current_frame | |
816 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
817 | |
818 | #ifndef COMPILER_REGISTER_BUG | |
819 | register | |
820 | #endif /* COMPILER_REGISTER_BUG */ | |
821 | struct window *w = XWINDOW (selected_window); | |
822 | #ifndef COMPILER_REGISTER_BUG | |
823 | register | |
824 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 825 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
826 | #ifndef COMPILER_REGISTER_BUG |
827 | register | |
828 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 829 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 830 | |
fa61c701 JB |
831 | /* Give up if about to continue line. */ |
832 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
833 | ||
4588ec20 JB |
834 | /* Avoid losing if cursor is in invisible text off left margin */ |
835 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
836 | ||
837 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 838 | || cursor_in_echo_area |
502b9b64 JB |
839 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
840 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 841 | |
502b9b64 | 842 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
843 | || !display_completed |
844 | ||
845 | /* Give up if buffer appears in two places. */ | |
846 | || buffer_shared > 1 | |
847 | ||
848 | /* Give up if w is minibuffer and a message is being displayed there */ | |
849 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
850 | return 0; | |
851 | ||
502b9b64 | 852 | current_frame->glyphs[vpos][hpos] = g; |
4588ec20 JB |
853 | unchanged_modified = MODIFF; |
854 | beg_unchanged = GPT - BEG; | |
855 | XFASTINT (w->last_point) = point; | |
856 | XFASTINT (w->last_point_x) = hpos; | |
857 | XFASTINT (w->last_modified) = MODIFF; | |
858 | ||
859 | reassert_line_highlight (0, vpos); | |
502b9b64 | 860 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 861 | fflush (stdout); |
502b9b64 JB |
862 | ++FRAME_CURSOR_X (frame); |
863 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 864 | { |
502b9b64 JB |
865 | current_frame->used[vpos] = hpos + 1; |
866 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
867 | } |
868 | ||
869 | return 1; | |
870 | } | |
871 | ||
872 | int | |
873 | direct_output_forward_char (n) | |
874 | int n; | |
875 | { | |
502b9b64 | 876 | register FRAME_PTR frame = selected_frame; |
4588ec20 JB |
877 | register struct window *w = XWINDOW (selected_window); |
878 | ||
a9764248 JB |
879 | /* Avoid losing if cursor is in invisible text off left margin |
880 | or about to go off either side of window. */ | |
502b9b64 | 881 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
882 | && (XINT (w->hscroll) || n < 0)) |
883 | || (n > 0 | |
fa61c701 | 884 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 885 | || cursor_in_echo_area) |
4588ec20 JB |
886 | return 0; |
887 | ||
502b9b64 JB |
888 | FRAME_CURSOR_X (frame) += n; |
889 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); | |
4588ec20 | 890 | XFASTINT (w->last_point) = point; |
502b9b64 | 891 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 JB |
892 | fflush (stdout); |
893 | return 1; | |
894 | } | |
895 | \f | |
896 | static void update_line (); | |
897 | ||
502b9b64 | 898 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
899 | Value is nonzero if redisplay stopped due to pending input. |
900 | FORCE nonzero means do not stop for pending input. */ | |
901 | ||
902 | int | |
502b9b64 JB |
903 | update_frame (f, force, inhibit_hairy_id) |
904 | FRAME_PTR f; | |
4588ec20 JB |
905 | int force; |
906 | int inhibit_hairy_id; | |
907 | { | |
502b9b64 JB |
908 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (f); |
909 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (f); | |
4588ec20 JB |
910 | register int i; |
911 | int pause; | |
912 | int preempt_count = baud_rate / 2400 + 1; | |
913 | extern input_pending; | |
914 | #ifdef HAVE_X_WINDOWS | |
915 | register int downto, leftmost; | |
916 | #endif | |
917 | ||
502b9b64 | 918 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
919 | |
920 | detect_input_pending (); | |
921 | if (input_pending && !force) | |
922 | { | |
923 | pause = 1; | |
924 | goto do_pause; | |
925 | } | |
926 | ||
502b9b64 | 927 | update_begin (f); |
4588ec20 JB |
928 | |
929 | if (!line_ins_del_ok) | |
930 | inhibit_hairy_id = 1; | |
931 | ||
efb859b4 JB |
932 | /* See if any of the desired lines are enabled; don't compute for |
933 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
934 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
935 | if (desired_frame->enable[i]) | |
4588ec20 JB |
936 | break; |
937 | ||
938 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
939 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
940 | force |= scrolling (f); | |
4588ec20 JB |
941 | |
942 | /* Update the individual lines as needed. Do bottom line first. */ | |
943 | ||
502b9b64 JB |
944 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
945 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
946 | |
947 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 948 | if (FRAME_X_P (f)) |
4588ec20 | 949 | { |
502b9b64 JB |
950 | leftmost = downto = f->display.x->internal_border_width; |
951 | if (desired_frame->enable[0]) | |
4588ec20 | 952 | { |
502b9b64 JB |
953 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
954 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
955 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 956 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
957 | current_frame->top_left_x[0] = leftmost; |
958 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
959 | } |
960 | } | |
961 | #endif /* HAVE_X_WINDOWS */ | |
962 | ||
963 | /* Now update the rest of the lines. */ | |
502b9b64 | 964 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 965 | { |
502b9b64 | 966 | if (desired_frame->enable[i]) |
4588ec20 | 967 | { |
b6a65ac2 | 968 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
969 | { |
970 | /* Flush out every so many lines. | |
971 | Also flush out if likely to have more than 1k buffered | |
972 | otherwise. I'm told that some telnet connections get | |
973 | really screwed by more than 1k output at once. */ | |
974 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
975 | if (outq > 900 | |
976 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
977 | { | |
978 | fflush (stdout); | |
979 | if (preempt_count == 1) | |
980 | { | |
a41f8bed JB |
981 | #ifdef EMACS_OUTQSIZE |
982 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
983 | /* Probably not a tty. Ignore the error and reset |
984 | * the outq count. */ | |
985 | outq = PENDING_OUTPUT_COUNT (stdout); | |
986 | #endif | |
987 | outq *= 10; | |
988 | sleep (outq / baud_rate); | |
989 | } | |
990 | } | |
991 | if ((i - 1) % preempt_count == 0) | |
992 | detect_input_pending (); | |
993 | } | |
994 | ||
502b9b64 | 995 | update_line (f, i); |
4588ec20 | 996 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 997 | if (FRAME_X_P (f)) |
4588ec20 | 998 | { |
502b9b64 JB |
999 | current_frame->top_left_y[i] = downto; |
1000 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1001 | } |
1002 | #endif /* HAVE_X_WINDOWS */ | |
1003 | } | |
1004 | ||
e5d77022 | 1005 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1006 | if (FRAME_X_P (f)) |
448fd7c0 | 1007 | downto += current_frame->pix_height[i]; |
e5d77022 | 1008 | #endif |
4588ec20 | 1009 | } |
502b9b64 | 1010 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1011 | |
1012 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1013 | if (!pause) | |
1014 | { | |
648fa17d JB |
1015 | if (cursor_in_echo_area |
1016 | && FRAME_HAS_MINIBUF_P (f)) | |
1113d9db | 1017 | { |
648fa17d JB |
1018 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1019 | int row, col; | |
1020 | ||
1021 | if (cursor_in_echo_area < 0) | |
1022 | { | |
1023 | row = top; | |
1024 | col = 0; | |
1025 | } | |
1113d9db | 1026 | else |
648fa17d JB |
1027 | { |
1028 | /* If the minibuffer is several lines high, find the last | |
1029 | line that has any text on it. */ | |
1030 | row = FRAME_HEIGHT (f); | |
1031 | do | |
1032 | { | |
1033 | row--; | |
1034 | if (current_frame->enable[row]) | |
1035 | col = current_frame->used[row]; | |
1036 | else | |
1037 | col = 0; | |
1038 | } | |
1039 | while (row > top && col == 0); | |
1040 | ||
1041 | if (col >= FRAME_WIDTH (f)) | |
1042 | { | |
1043 | col = 0; | |
1044 | if (row < FRAME_HEIGHT (f) - 1) | |
1045 | row++; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | cursor_to (row, col); | |
1113d9db | 1050 | } |
4588ec20 | 1051 | else |
502b9b64 JB |
1052 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1053 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1054 | } |
1055 | ||
502b9b64 | 1056 | update_end (f); |
4588ec20 JB |
1057 | |
1058 | if (termscript) | |
1059 | fflush (termscript); | |
1060 | fflush (stdout); | |
1061 | ||
1062 | /* Here if output is preempted because input is detected. */ | |
1063 | do_pause: | |
1064 | ||
502b9b64 | 1065 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1066 | display_completed = !pause; |
1067 | ||
502b9b64 | 1068 | bzero (desired_frame->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1069 | return pause; |
1070 | } | |
1071 | ||
1072 | /* Called when about to quit, to check for doing so | |
1073 | at an improper time. */ | |
1074 | ||
1075 | void | |
1076 | quit_error_check () | |
1077 | { | |
502b9b64 | 1078 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1079 | return; |
502b9b64 | 1080 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1081 | abort (); |
502b9b64 | 1082 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1083 | abort (); |
1084 | } | |
1085 | \f | |
1086 | /* Decide what insert/delete line to do, and do it */ | |
1087 | ||
1088 | extern void scrolling_1 (); | |
1089 | ||
502b9b64 JB |
1090 | scrolling (frame) |
1091 | FRAME_PTR frame; | |
4588ec20 JB |
1092 | { |
1093 | int unchanged_at_top, unchanged_at_bottom; | |
1094 | int window_size; | |
1095 | int changed_lines; | |
502b9b64 JB |
1096 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1097 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1098 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
4588ec20 | 1099 | register int i; |
502b9b64 JB |
1100 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1101 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1102 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1103 | |
1104 | /* Compute hash codes of all the lines. | |
1105 | Also calculate number of changed lines, | |
1106 | number of unchanged lines at the beginning, | |
1107 | and number of unchanged lines at the end. */ | |
1108 | ||
1109 | changed_lines = 0; | |
1110 | unchanged_at_top = 0; | |
502b9b64 JB |
1111 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1112 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1113 | { |
1114 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1115 | if (!current_frame->enable[i]) |
4588ec20 | 1116 | return 0; |
502b9b64 JB |
1117 | old_hash[i] = line_hash_code (current_frame, i); |
1118 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1119 | new_hash[i] = old_hash[i]; |
1120 | else | |
502b9b64 | 1121 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1122 | |
1123 | if (old_hash[i] != new_hash[i]) | |
1124 | { | |
1125 | changed_lines++; | |
502b9b64 | 1126 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1127 | } |
1128 | else if (i == unchanged_at_top) | |
1129 | unchanged_at_top++; | |
502b9b64 | 1130 | draw_cost[i] = line_draw_cost (desired_frame, i); |
4588ec20 JB |
1131 | } |
1132 | ||
1133 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1134 | if (changed_lines < baud_rate / 2400 | |
502b9b64 | 1135 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1136 | return 1; |
1137 | ||
502b9b64 | 1138 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1139 | - unchanged_at_bottom); |
1140 | ||
1141 | if (scroll_region_ok) | |
1142 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1143 | else if (memory_below_frame) |
4588ec20 JB |
1144 | free_at_end_vpos = -1; |
1145 | ||
1146 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1147 | current frame and desired frame, don't bother with i/d calc. */ |
4588ec20 JB |
1148 | if (window_size >= 18 && baud_rate > 2400 |
1149 | && (window_size >= | |
1150 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1151 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1152 | old_hash, new_hash, draw_cost))) |
1153 | return 0; | |
1154 | ||
502b9b64 | 1155 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 JB |
1156 | draw_cost + unchanged_at_top - 1, |
1157 | old_hash + unchanged_at_top - 1, | |
1158 | new_hash + unchanged_at_top - 1, | |
1159 | free_at_end_vpos - unchanged_at_top); | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | \f | |
1164 | /* Return the offset in its buffer of the character at location col, line | |
1165 | in the given window. */ | |
1166 | int | |
1167 | buffer_posn_from_coords (window, col, line) | |
1168 | struct window *window; | |
1169 | int col, line; | |
1170 | { | |
1171 | int window_left = XFASTINT (window->left); | |
1172 | ||
1173 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1174 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1175 | window. */ | |
fa61c701 | 1176 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1177 | |
efb859b4 | 1178 | int startp = marker_position (window->start); |
4588ec20 JB |
1179 | |
1180 | /* Since compute_motion will only operate on the current buffer, | |
1181 | we need to save the old one and restore it when we're done. */ | |
1182 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1183 | struct position *posn; |
4588ec20 JB |
1184 | |
1185 | current_buffer = XBUFFER (window->buffer); | |
1186 | ||
502b9b64 JB |
1187 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1188 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1189 | the window, but it isn't maintained correctly, and I'm not even |
1190 | sure I will keep it. */ | |
1191 | posn = compute_motion (startp, 0, | |
1192 | (window == XWINDOW (minibuf_window) && startp == 1 | |
1193 | ? minibuf_prompt_width : 0), | |
1194 | ZV, line, col - window_left, | |
1195 | window_width, XINT (window->hscroll), 0); | |
4588ec20 JB |
1196 | |
1197 | current_buffer = old_current_buffer; | |
1198 | ||
502b9b64 | 1199 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1200 | to be *after* the newline, i.e. at the start of the next line. |
1201 | This is reasonable, but not really what we want. So if the | |
1202 | result is on a line below LINE, back it up one character. */ | |
1203 | if (posn->vpos > line) | |
1204 | return posn->bufpos - 1; | |
1205 | else | |
1206 | return posn->bufpos; | |
4588ec20 JB |
1207 | } |
1208 | \f | |
1209 | static int | |
1210 | count_blanks (r) | |
1211 | register GLYPH *r; | |
1212 | { | |
1213 | register GLYPH *p = r; | |
94aa5d2d RS |
1214 | while (*p++ == SPACEGLYPH); |
1215 | return p - r - 1; | |
4588ec20 JB |
1216 | } |
1217 | ||
1218 | static int | |
1219 | count_match (str1, str2) | |
1220 | GLYPH *str1, *str2; | |
1221 | { | |
1222 | register GLYPH *p1 = str1; | |
1223 | register GLYPH *p2 = str2; | |
1224 | while (*p1++ == *p2++); | |
1225 | return p1 - str1 - 1; | |
1226 | } | |
1227 | ||
1228 | /* Char insertion/deletion cost vector, from term.c */ | |
1229 | extern int *char_ins_del_vector; | |
1230 | ||
502b9b64 | 1231 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_HEIGHT((f))]) |
4588ec20 JB |
1232 | |
1233 | static void | |
502b9b64 JB |
1234 | update_line (frame, vpos) |
1235 | register FRAME_PTR frame; | |
4588ec20 JB |
1236 | int vpos; |
1237 | { | |
1238 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1239 | int tem; | |
1240 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1241 | int save; | |
502b9b64 JB |
1242 | register struct frame_glyphs *current_frame |
1243 | = FRAME_CURRENT_GLYPHS (frame); | |
1244 | register struct frame_glyphs *desired_frame | |
1245 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1246 | |
502b9b64 JB |
1247 | if (desired_frame->highlight[vpos] |
1248 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1249 | { |
502b9b64 JB |
1250 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1251 | (current_frame->enable[vpos] ? | |
1252 | current_frame->used[vpos] : 0)); | |
1253 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1254 | } |
1255 | else | |
502b9b64 | 1256 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1257 | |
502b9b64 | 1258 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1259 | { |
1260 | olen = 0; | |
1261 | } | |
1262 | else | |
1263 | { | |
502b9b64 JB |
1264 | obody = current_frame->glyphs[vpos]; |
1265 | olen = current_frame->used[vpos]; | |
1266 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1267 | { |
1268 | if (!must_write_spaces) | |
1269 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1270 | olen--; | |
1271 | } | |
1272 | else | |
1273 | { | |
1274 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1275 | spaces all the way to the frame edge |
4588ec20 JB |
1276 | so that the reverse video extends all the way across. */ |
1277 | ||
502b9b64 | 1278 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1279 | obody[olen++] = SPACEGLYPH; |
1280 | } | |
1281 | } | |
1282 | ||
1283 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1284 | current_frame->enable[vpos] = 1; |
1285 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1286 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1287 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1288 | |
1289 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1290 | if (FRAME_X_P (frame)) |
4588ec20 | 1291 | { |
502b9b64 JB |
1292 | current_frame->pix_width[vpos] |
1293 | = current_frame->used[vpos] | |
1294 | * FONT_WIDTH (frame->display.x->font); | |
1295 | current_frame->pix_height[vpos] | |
1296 | = FONT_HEIGHT (frame->display.x->font); | |
4588ec20 JB |
1297 | } |
1298 | #endif /* HAVE_X_WINDOWS */ | |
1299 | ||
502b9b64 | 1300 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1301 | { |
1302 | nlen = 0; | |
1303 | goto just_erase; | |
1304 | } | |
1305 | ||
502b9b64 JB |
1306 | nbody = desired_frame->glyphs[vpos]; |
1307 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1308 | |
1309 | /* Pretend trailing spaces are not there at all, | |
1310 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1311 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1312 | { |
1313 | if (!must_write_spaces) | |
1314 | /* We know that the previous character byte contains 0. */ | |
1315 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1316 | nlen--; | |
1317 | } | |
1318 | else | |
1319 | { | |
1320 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1321 | all the way to the frame edge |
4588ec20 JB |
1322 | so that the reverse video extends all the way across. */ |
1323 | ||
502b9b64 | 1324 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1325 | nbody[nlen++] = SPACEGLYPH; |
1326 | } | |
1327 | ||
1328 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1329 | if (!char_ins_del_ok) | |
1330 | { | |
1331 | int i,j; | |
1332 | ||
1333 | for (i = 0; i < nlen; i++) | |
1334 | { | |
1335 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1336 | { | |
1337 | cursor_to (vpos, i); | |
1338 | for (j = 1; (i + j < nlen && | |
1339 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1340 | j++); | |
1341 | ||
1342 | /* Output this run of non-matching chars. */ | |
1343 | write_glyphs (nbody + i, j); | |
1344 | i += j - 1; | |
1345 | ||
1346 | /* Now find the next non-match. */ | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1351 | if (olen > nlen) | |
1352 | { | |
1353 | cursor_to (vpos, nlen); | |
1354 | clear_end_of_line (olen); | |
1355 | } | |
1356 | ||
502b9b64 JB |
1357 | /* Exchange contents between current_frame and new_frame. */ |
1358 | temp = desired_frame->glyphs[vpos]; | |
1359 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1360 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1361 | |
1362 | return; | |
1363 | } | |
1364 | ||
1365 | if (!olen) | |
1366 | { | |
502b9b64 | 1367 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1368 | ? 0 : count_blanks (nbody); |
1369 | if (nlen > nsp) | |
1370 | { | |
1371 | cursor_to (vpos, nsp); | |
1372 | write_glyphs (nbody + nsp, nlen - nsp); | |
1373 | } | |
1374 | ||
502b9b64 JB |
1375 | /* Exchange contents between current_frame and new_frame. */ |
1376 | temp = desired_frame->glyphs[vpos]; | |
1377 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1378 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1379 | |
1380 | return; | |
1381 | } | |
1382 | ||
1383 | obody[olen] = 1; | |
1384 | save = nbody[nlen]; | |
1385 | nbody[nlen] = 0; | |
1386 | ||
1387 | /* Compute number of leading blanks in old and new contents. */ | |
1388 | osp = count_blanks (obody); | |
502b9b64 | 1389 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1390 | nsp = count_blanks (nbody); |
1391 | else | |
1392 | nsp = 0; | |
1393 | ||
1394 | /* Compute number of matching chars starting with first nonblank. */ | |
1395 | begmatch = count_match (obody + osp, nbody + nsp); | |
1396 | ||
1397 | /* Spaces in new match implicit space past the end of old. */ | |
1398 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1399 | if (!must_write_spaces && osp + begmatch == olen) | |
1400 | { | |
1401 | np1 = nbody + nsp; | |
1402 | while (np1[begmatch] == SPACEGLYPH) | |
1403 | begmatch++; | |
1404 | } | |
1405 | ||
1406 | /* Avoid doing insert/delete char | |
1407 | just cause number of leading spaces differs | |
1408 | when the following text does not match. */ | |
1409 | if (begmatch == 0 && osp != nsp) | |
1410 | osp = nsp = min (osp, nsp); | |
1411 | ||
1412 | /* Find matching characters at end of line */ | |
1413 | op1 = obody + olen; | |
1414 | np1 = nbody + nlen; | |
1415 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1416 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1417 | { | |
1418 | op1--; | |
1419 | np1--; | |
1420 | } | |
1421 | endmatch = obody + olen - op1; | |
1422 | ||
1423 | /* Put correct value back in nbody[nlen]. | |
1424 | This is important because direct_output_for_insert | |
1425 | can write into the line at a later point. | |
1426 | If this screws up the zero at the end of the line, re-establish it. */ | |
1427 | nbody[nlen] = save; | |
1428 | obody[olen] = 0; | |
1429 | ||
1430 | /* tem gets the distance to insert or delete. | |
1431 | endmatch is how many characters we save by doing so. | |
1432 | Is it worth it? */ | |
1433 | ||
1434 | tem = (nlen - nsp) - (olen - osp); | |
1435 | if (endmatch && tem | |
502b9b64 | 1436 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1437 | endmatch = 0; |
1438 | ||
1439 | /* nsp - osp is the distance to insert or delete. | |
1440 | If that is nonzero, begmatch is known to be nonzero also. | |
1441 | begmatch + endmatch is how much we save by doing the ins/del. | |
1442 | Is it worth it? */ | |
1443 | ||
1444 | if (nsp != osp | |
1445 | && (!char_ins_del_ok | |
502b9b64 | 1446 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1447 | { |
1448 | begmatch = 0; | |
1449 | endmatch = 0; | |
1450 | osp = nsp = min (osp, nsp); | |
1451 | } | |
1452 | ||
1453 | /* Now go through the line, inserting, writing and | |
1454 | deleting as appropriate. */ | |
1455 | ||
1456 | if (osp > nsp) | |
1457 | { | |
1458 | cursor_to (vpos, nsp); | |
1459 | delete_glyphs (osp - nsp); | |
1460 | } | |
1461 | else if (nsp > osp) | |
1462 | { | |
1463 | /* If going to delete chars later in line | |
1464 | and insert earlier in the line, | |
1465 | must delete first to avoid losing data in the insert */ | |
1466 | if (endmatch && nlen < olen + nsp - osp) | |
1467 | { | |
1468 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1469 | delete_glyphs (olen + nsp - osp - nlen); | |
1470 | olen = nlen - (nsp - osp); | |
1471 | } | |
1472 | cursor_to (vpos, osp); | |
1473 | insert_glyphs ((char *)0, nsp - osp); | |
1474 | } | |
1475 | olen += nsp - osp; | |
1476 | ||
1477 | tem = nsp + begmatch + endmatch; | |
1478 | if (nlen != tem || olen != tem) | |
1479 | { | |
1480 | cursor_to (vpos, nsp + begmatch); | |
1481 | if (!endmatch || nlen == olen) | |
1482 | { | |
1483 | /* If new text being written reaches right margin, | |
1484 | there is no need to do clear-to-eol at the end. | |
1485 | (and it would not be safe, since cursor is not | |
1486 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1487 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1488 | olen = 0; |
1489 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1490 | ||
1491 | #ifdef obsolete | |
1492 | ||
1493 | /* the following code loses disastrously if tem == nlen. | |
1494 | Rather than trying to fix that case, I am trying the simpler | |
1495 | solution found above. */ | |
1496 | ||
1497 | /* If the text reaches to the right margin, | |
1498 | it will lose one way or another (depending on AutoWrap) | |
1499 | to clear to end of line after outputting all the text. | |
1500 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1501 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1502 | { |
1503 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1504 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1505 | clear_end_of_line (olen); | |
1506 | olen = 0; /* Don't let it be cleared again later */ | |
1507 | write_glyphs (nbody + nlen - 1, 1); | |
1508 | } | |
1509 | else | |
1510 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1511 | #endif /* OBSOLETE */ | |
1512 | ||
1513 | } | |
1514 | else if (nlen > olen) | |
1515 | { | |
1516 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1517 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1518 | olen = nlen; | |
1519 | } | |
1520 | else if (olen > nlen) | |
1521 | { | |
1522 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1523 | delete_glyphs (olen - nlen); | |
1524 | olen = nlen; | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | just_erase: | |
1529 | /* If any unerased characters remain after the new line, erase them. */ | |
1530 | if (olen > nlen) | |
1531 | { | |
1532 | cursor_to (vpos, nlen); | |
1533 | clear_end_of_line (olen); | |
1534 | } | |
1535 | ||
502b9b64 JB |
1536 | /* Exchange contents between current_frame and new_frame. */ |
1537 | temp = desired_frame->glyphs[vpos]; | |
1538 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1539 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1540 | } |
1541 | \f | |
1542 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1543 | 1, 1, "FOpen termscript file: ", | |
1544 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1545 | FILE = nil means just close any termscript file currently open.") | |
1546 | (file) | |
1547 | Lisp_Object file; | |
1548 | { | |
1549 | if (termscript != 0) fclose (termscript); | |
1550 | termscript = 0; | |
1551 | ||
efb859b4 | 1552 | if (! NILP (file)) |
4588ec20 JB |
1553 | { |
1554 | file = Fexpand_file_name (file, Qnil); | |
1555 | termscript = fopen (XSTRING (file)->data, "w"); | |
1556 | if (termscript == 0) | |
1557 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1558 | } | |
1559 | return Qnil; | |
1560 | } | |
1561 | \f | |
1562 | ||
1563 | #ifdef SIGWINCH | |
efb859b4 | 1564 | SIGTYPE |
4588ec20 JB |
1565 | window_change_signal () |
1566 | { | |
1567 | int width, height; | |
1568 | extern int errno; | |
1569 | int old_errno = errno; | |
1570 | ||
502b9b64 | 1571 | get_frame_size (&width, &height); |
4588ec20 | 1572 | |
502b9b64 JB |
1573 | /* The frame size change obviously applies to a termcap-controlled |
1574 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 1575 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 1576 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
1577 | but don't reallocate the data structures now. Let that be done |
1578 | later outside of the signal handler. */ | |
1579 | ||
1580 | { | |
1581 | Lisp_Object tail; | |
502b9b64 | 1582 | FRAME_PTR f; |
4588ec20 | 1583 | |
502b9b64 | 1584 | FOR_EACH_FRAME (tail, f) |
4588ec20 | 1585 | { |
b6a65ac2 | 1586 | if (FRAME_TERMCAP_P (f)) |
4588ec20 | 1587 | { |
b6a65ac2 | 1588 | change_frame_size (f, height, width, 0, 1); |
4588ec20 JB |
1589 | break; |
1590 | } | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | signal (SIGWINCH, window_change_signal); | |
1595 | errno = old_errno; | |
1596 | } | |
1597 | #endif /* SIGWINCH */ | |
1598 | ||
1599 | ||
502b9b64 | 1600 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
1601 | |
1602 | do_pending_window_change () | |
1603 | { | |
1604 | /* If window_change_signal should have run before, run it now. */ | |
1605 | while (delayed_size_change) | |
1606 | { | |
1607 | Lisp_Object tail; | |
502b9b64 | 1608 | FRAME_PTR f; |
4588ec20 JB |
1609 | |
1610 | delayed_size_change = 0; | |
1611 | ||
502b9b64 | 1612 | FOR_EACH_FRAME (tail, f) |
4588ec20 | 1613 | { |
502b9b64 JB |
1614 | int height = FRAME_NEW_HEIGHT (f); |
1615 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 1616 | |
502b9b64 JB |
1617 | FRAME_NEW_HEIGHT (f) = 0; |
1618 | FRAME_NEW_WIDTH (f) = 0; | |
4588ec20 JB |
1619 | |
1620 | if (height != 0) | |
b6a65ac2 | 1621 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
1622 | } |
1623 | } | |
1624 | } | |
1625 | ||
1626 | ||
502b9b64 | 1627 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 1628 | indicate no change is to take place. |
4588ec20 | 1629 | |
b6a65ac2 JB |
1630 | If DELAY is non-zero, then assume we're being called from a signal |
1631 | handler, and queue the change for later - perhaps the next | |
1632 | redisplay. Since this tries to resize windows, we can't call it | |
1633 | from a signal handler. */ | |
1634 | ||
1635 | change_frame_size (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 1636 | register FRAME_PTR frame; |
b6a65ac2 | 1637 | int newheight, newwidth, pretend; |
4588ec20 JB |
1638 | { |
1639 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 1640 | if (delay) |
4588ec20 | 1641 | { |
b6a65ac2 | 1642 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 1643 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
1644 | delayed_size_change = 1; |
1645 | return; | |
1646 | } | |
1647 | ||
502b9b64 JB |
1648 | /* This size-change overrides any pending one for this frame. */ |
1649 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
1650 | FRAME_NEW_WIDTH (frame) = 0; |
1651 | ||
1652 | /* If an arguments is zero, set it to the current value. */ | |
1653 | newheight || (newheight = FRAME_HEIGHT (frame)); | |
1654 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 1655 | |
b6a65ac2 JB |
1656 | /* Round up to the smallest acceptable size. */ |
1657 | check_frame_size (frame, &newheight, &newwidth); | |
1658 | ||
1659 | /* If we're not changing the frame size, quit now. */ | |
1660 | if (newheight == FRAME_HEIGHT (frame) | |
1661 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
1662 | return; |
1663 | ||
b6a65ac2 | 1664 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 1665 | { |
b6a65ac2 | 1666 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 1667 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 1668 | { |
502b9b64 JB |
1669 | /* Frame has both root and minibuffer. */ |
1670 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
b6a65ac2 | 1671 | newheight - 1, 0); |
502b9b64 | 1672 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
b6a65ac2 | 1673 | = newheight - 1; |
502b9b64 | 1674 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
1675 | } |
1676 | else | |
502b9b64 | 1677 | /* Frame has just one top-level window. */ |
b6a65ac2 JB |
1678 | set_window_height (FRAME_ROOT_WINDOW (frame), newheight, 0); |
1679 | ||
1680 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
1681 | FrameRows = newheight; | |
4588ec20 JB |
1682 | |
1683 | #if 0 | |
502b9b64 | 1684 | if (frame->output_method == output_termcap) |
4588ec20 | 1685 | { |
b6a65ac2 | 1686 | frame_height = newheight; |
4588ec20 | 1687 | if (!pretend) |
b6a65ac2 | 1688 | FrameRows = newheight; |
4588ec20 JB |
1689 | } |
1690 | #endif | |
1691 | } | |
1692 | ||
b6a65ac2 | 1693 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 1694 | { |
502b9b64 | 1695 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 1696 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 1697 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 1698 | |
b6a65ac2 | 1699 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 1700 | FrameCols = newwidth; |
4588ec20 | 1701 | #if 0 |
502b9b64 | 1702 | if (frame->output_method == output_termcap) |
4588ec20 | 1703 | { |
502b9b64 | 1704 | frame_width = newwidth; |
4588ec20 | 1705 | if (!pretend) |
502b9b64 | 1706 | FrameCols = newwidth; |
4588ec20 JB |
1707 | } |
1708 | #endif | |
1709 | } | |
1710 | ||
b6a65ac2 JB |
1711 | FRAME_HEIGHT (frame) = newheight; |
1712 | FRAME_WIDTH (frame) = newwidth; | |
1713 | ||
502b9b64 JB |
1714 | remake_frame_glyphs (frame); |
1715 | calculate_costs (frame); | |
4588ec20 JB |
1716 | } |
1717 | \f | |
1718 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1719 | Ssend_string_to_terminal, 1, 1, 0, | |
1720 | "Send STRING to the terminal without alteration.\n\ | |
1721 | Control characters in STRING will have terminal-dependent effects.") | |
1722 | (str) | |
1723 | Lisp_Object str; | |
1724 | { | |
1725 | CHECK_STRING (str, 0); | |
1726 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1727 | fflush (stdout); | |
1728 | if (termscript) | |
1729 | { | |
1730 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1731 | fflush (termscript); | |
1732 | } | |
1733 | return Qnil; | |
1734 | } | |
1735 | ||
1736 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1737 | "Beep, or flash the screen.\n\ | |
1738 | Also, unless an argument is given,\n\ | |
1739 | terminate any keyboard macro currently executing.") | |
1740 | (arg) | |
1741 | Lisp_Object arg; | |
1742 | { | |
efb859b4 | 1743 | if (!NILP (arg)) |
4588ec20 | 1744 | { |
7fa788da RS |
1745 | if (noninteractive) |
1746 | putchar (07); | |
1747 | else | |
1748 | ring_bell (); | |
4588ec20 JB |
1749 | fflush (stdout); |
1750 | } | |
1751 | else | |
1752 | bitch_at_user (); | |
1753 | ||
1754 | return Qnil; | |
1755 | } | |
1756 | ||
1757 | bitch_at_user () | |
1758 | { | |
1759 | if (noninteractive) | |
1760 | putchar (07); | |
1761 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1762 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1763 | else | |
1764 | ring_bell (); | |
1765 | fflush (stdout); | |
1766 | } | |
1767 | ||
1768 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
1769 | "Pause, without updating display, for ARG seconds.\n\ | |
1770 | Optional second arg non-nil means ARG is measured in milliseconds.\n\ | |
1771 | \(Not all operating systems support milliseconds.)") | |
f76475ad JB |
1772 | (arg, millisec) |
1773 | Lisp_Object arg, millisec; | |
4588ec20 | 1774 | { |
4588ec20 JB |
1775 | int usec = 0; |
1776 | int sec; | |
1777 | ||
f76475ad JB |
1778 | CHECK_NUMBER (arg, 0); |
1779 | sec = XINT (arg); | |
4588ec20 JB |
1780 | if (sec <= 0) |
1781 | return Qnil; | |
1782 | ||
efb859b4 | 1783 | if (!NILP (millisec)) |
4588ec20 | 1784 | { |
a41f8bed | 1785 | #ifndef EMACS_HAS_USECS |
06ef7355 | 1786 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 JB |
1787 | #else |
1788 | usec = sec % 1000 * 1000; | |
1789 | sec /= 1000; | |
1790 | #endif | |
1791 | } | |
1792 | ||
f76475ad JB |
1793 | { |
1794 | Lisp_Object zero; | |
1795 | ||
1796 | XFASTINT (zero) = 0; | |
1797 | wait_reading_process_input (sec, usec, zero, 0); | |
1798 | } | |
d1af74e9 JB |
1799 | |
1800 | #if 0 /* No wait_reading_process_input */ | |
4588ec20 JB |
1801 | immediate_quit = 1; |
1802 | QUIT; | |
1803 | ||
1804 | #ifdef VMS | |
1805 | sys_sleep (sec); | |
1806 | #else /* not VMS */ | |
1807 | /* The reason this is done this way | |
1808 | (rather than defined (H_S) && defined (H_T)) | |
1809 | is because the VMS preprocessor doesn't grok `defined' */ | |
1810 | #ifdef HAVE_SELECT | |
a41f8bed JB |
1811 | EMACS_GET_TIME (end_time); |
1812 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 1813 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 1814 | |
4588ec20 JB |
1815 | while (1) |
1816 | { | |
a41f8bed JB |
1817 | EMACS_GET_TIME (timeout); |
1818 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1819 | if (EMACS_TIME_NEG_P (timeout) | |
1820 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
1821 | break; |
1822 | } | |
4588ec20 JB |
1823 | #else /* not HAVE_SELECT */ |
1824 | sleep (sec); | |
1825 | #endif /* HAVE_SELECT */ | |
1826 | #endif /* not VMS */ | |
1827 | ||
1828 | immediate_quit = 0; | |
1829 | #endif /* no subprocesses */ | |
1830 | ||
1831 | return Qnil; | |
1832 | } | |
1833 | ||
f76475ad JB |
1834 | /* This is just like wait_reading_process_input, except that |
1835 | it does the redisplay. | |
1836 | ||
1837 | It's also just like Fsit_for, except that it can be used for | |
1838 | waiting for input as well. */ | |
4588ec20 | 1839 | |
f76475ad JB |
1840 | Lisp_Object |
1841 | sit_for (sec, usec, reading, display) | |
1842 | int sec, usec, reading, display; | |
1843 | { | |
1844 | Lisp_Object read_kbd; | |
4588ec20 JB |
1845 | |
1846 | if (detect_input_pending ()) | |
1847 | return Qnil; | |
4588ec20 | 1848 | |
f76475ad JB |
1849 | if (display) |
1850 | redisplay_preserve_echo_area (); | |
4588ec20 | 1851 | |
dfdb645c JB |
1852 | if (sec == 0 && usec == 0) |
1853 | return Qt; | |
1854 | ||
4588ec20 JB |
1855 | #ifdef SIGIO |
1856 | gobble_input (); | |
f76475ad JB |
1857 | #endif |
1858 | ||
1859 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
1860 | wait_reading_process_input (sec, usec, read_kbd, display); | |
1861 | ||
d1af74e9 JB |
1862 | |
1863 | #if 0 /* No wait_reading_process_input available. */ | |
4588ec20 JB |
1864 | immediate_quit = 1; |
1865 | QUIT; | |
1866 | ||
1867 | waitchannels = 1; | |
1868 | #ifdef VMS | |
f76475ad | 1869 | input_wait_timeout (XINT (arg)); |
4588ec20 | 1870 | #else /* not VMS */ |
d1af74e9 JB |
1871 | #ifndef HAVE_TIMEVAL |
1872 | timeout_sec = sec; | |
1873 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
1874 | #else /* HAVE_TIMEVAL */ | |
1875 | timeout.tv_sec = sec; | |
1876 | timeout.tv_usec = usec; | |
4588ec20 | 1877 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 1878 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
1879 | #endif /* not VMS */ |
1880 | ||
1881 | immediate_quit = 0; | |
d1af74e9 | 1882 | #endif |
4588ec20 JB |
1883 | |
1884 | return detect_input_pending () ? Qnil : Qt; | |
1885 | } | |
1886 | ||
f76475ad JB |
1887 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
1888 | "Perform redisplay, then wait for ARG seconds or until input is available.\n\ | |
1889 | Optional second arg non-nil means ARG counts in milliseconds.\n\ | |
1890 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ | |
1891 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
1892 | if input is available before it starts.\n\ | |
1893 | Value is t if waited the full time with no input arriving.") | |
1894 | (arg, millisec, nodisp) | |
1895 | Lisp_Object arg, millisec, nodisp; | |
1896 | { | |
1897 | int usec = 0; | |
1113d9db | 1898 | int sec; |
f76475ad JB |
1899 | |
1900 | CHECK_NUMBER (arg, 0); | |
1113d9db | 1901 | sec = XINT (arg); |
f76475ad | 1902 | |
f76475ad JB |
1903 | if (!NILP (millisec)) |
1904 | { | |
1905 | #ifndef EMACS_HAS_USECS | |
06ef7355 | 1906 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); |
f76475ad JB |
1907 | #else |
1908 | usec = (sec % 1000) * 1000; | |
1909 | sec /= 1000; | |
1910 | #endif | |
1911 | } | |
1912 | ||
1913 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
1914 | } | |
1915 | ||
4588ec20 JB |
1916 | DEFUN ("sleep-for-millisecs", Fsleep_for_millisecs, Ssleep_for_millisecs, |
1917 | 1, 1, 0, | |
1918 | "Pause, without updating display, for ARG milliseconds.") | |
f76475ad JB |
1919 | (arg) |
1920 | Lisp_Object arg; | |
4588ec20 | 1921 | { |
f76475ad JB |
1922 | Lisp_Object zero; |
1923 | ||
a41f8bed | 1924 | #ifndef EMACS_HAS_USECS |
4588ec20 JB |
1925 | error ("sleep-for-millisecs not supported on %s", SYSTEM_TYPE); |
1926 | #else | |
f76475ad JB |
1927 | CHECK_NUMBER (arg, 0); |
1928 | ||
1929 | XFASTINT (zero) = 0; | |
1930 | wait_reading_process_input (XINT (arg) / 1000, XINT (arg) % 1000 * 1000, | |
1931 | zero, 0); | |
4588ec20 | 1932 | return Qnil; |
a41f8bed | 1933 | #endif /* EMACS_HAS_USECS */ |
4588ec20 JB |
1934 | } |
1935 | \f | |
1936 | char *terminal_type; | |
1937 | ||
1938 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
1939 | /* Determine terminal type and set terminal_driver */ | |
1940 | /* Then invoke its decoding routine to set up variables | |
1941 | in the terminal package */ | |
1942 | ||
1943 | init_display () | |
1944 | { | |
1945 | #ifdef HAVE_X_WINDOWS | |
1946 | extern int display_arg; | |
1947 | #endif | |
1948 | ||
1949 | meta_key = 0; | |
1950 | inverse_video = 0; | |
1951 | cursor_in_echo_area = 0; | |
1952 | terminal_type = (char *) 0; | |
1953 | ||
1954 | /* If the DISPLAY environment variable is set, try to use X, and | |
1955 | die with an error message if that doesn't work. */ | |
1956 | ||
1957 | /* Check if we're using a window system here before trying to | |
1958 | initialize the terminal. If we check the terminal first, | |
1959 | ||
1960 | If someone has indicated that they want | |
1961 | to use a window system, we shouldn't bother initializing the | |
1962 | terminal. This is especially important when the terminal is so | |
1963 | dumb that emacs gives up before and doesn't bother using the window | |
1964 | system. */ | |
1965 | ||
1966 | #ifdef HAVE_X_WINDOWS | |
efb859b4 | 1967 | if (!inhibit_window_system && (display_arg || getenv ("DISPLAY"))) |
4588ec20 JB |
1968 | { |
1969 | Vwindow_system = intern ("x"); | |
1970 | #ifdef HAVE_X11 | |
1971 | Vwindow_system_version = make_number (11); | |
1972 | #else | |
1973 | Vwindow_system_version = make_number (10); | |
1974 | #endif | |
1975 | return; | |
1976 | } | |
1977 | #endif /* HAVE_X_WINDOWS */ | |
1978 | ||
1979 | /* If no window system has been specified, try to use the terminal. */ | |
1980 | if (! isatty (0)) | |
1981 | { | |
1982 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
1983 | exit (1); | |
1984 | } | |
1985 | ||
1986 | /* Look at the TERM variable */ | |
1987 | terminal_type = (char *) getenv ("TERM"); | |
1988 | if (!terminal_type) | |
1989 | { | |
1990 | #ifdef VMS | |
1991 | fprintf (stderr, "Please specify your terminal type.\n\ | |
1992 | For types defined in VMS, use set term /device=TYPE.\n\ | |
1993 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
1994 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
1995 | #else | |
1996 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
1997 | #endif | |
1998 | exit (1); | |
1999 | } | |
2000 | ||
2001 | #ifdef VMS | |
2002 | /* VMS DCL tends to upcase things, so downcase term type. | |
2003 | Hardly any uppercase letters in terminal types; should be none. */ | |
2004 | { | |
2005 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2006 | char *p; | |
2007 | ||
2008 | strcpy (new, terminal_type); | |
2009 | ||
2010 | for (p = new; *p; p++) | |
2011 | if (isupper (*p)) | |
2012 | *p = tolower (*p); | |
2013 | ||
2014 | terminal_type = new; | |
2015 | } | |
2016 | #endif | |
2017 | ||
2018 | term_init (terminal_type); | |
2019 | ||
502b9b64 JB |
2020 | remake_frame_glyphs (selected_frame); |
2021 | calculate_costs (selected_frame); | |
4588ec20 JB |
2022 | |
2023 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2024 | FRAME_CURSOR_X (selected_frame) = 0; |
2025 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2026 | |
2027 | #ifdef SIGWINCH | |
2028 | #ifndef CANNOT_DUMP | |
2029 | if (initialized) | |
2030 | #endif /* CANNOT_DUMP */ | |
2031 | signal (SIGWINCH, window_change_signal); | |
2032 | #endif /* SIGWINCH */ | |
2033 | } | |
2034 | \f | |
2035 | syms_of_display () | |
2036 | { | |
502b9b64 JB |
2037 | #ifdef MULTI_FRAME |
2038 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2039 | #endif |
2040 | defsubr (&Sredraw_display); | |
2041 | defsubr (&Sopen_termscript); | |
2042 | defsubr (&Sding); | |
2043 | defsubr (&Ssit_for); | |
2044 | defsubr (&Ssleep_for); | |
2045 | defsubr (&Ssend_string_to_terminal); | |
2046 | ||
2047 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2048 | "The output baud rate of the terminal.\n\ | |
2049 | On most systems, changing this value will affect the amount of padding\n\ | |
2050 | and the other strategic decisions made during redisplay."); | |
2051 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2052 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2053 | This means everything is in inverse video which otherwise would not be."); |
2054 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2055 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2056 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2057 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2058 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2059 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2060 | It is up to you to set this variable if your terminal can do that."); |
2061 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2062 | "A symbol naming the window-system under which Emacs is running\n\ | |
2063 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2064 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2065 | "The version number of the window system in use.\n\ | |
2066 | For X windows, this is 10 or 11."); | |
2067 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2068 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2069 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2070 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2071 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2072 | Each element can be:\n\ | |
2073 | integer: a glyph code which this glyph is an alias for.\n\ | |
2074 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2075 | nil: this glyph mod 256 is char code to output,\n\ | |
2076 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2077 | Vglyph_table = Qnil; | |
2078 | ||
2079 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2080 | "Display table to use for buffers that specify none.\n\ | |
2081 | See `buffer-display-table' for more information."); | |
2082 | Vstandard_display_table = Qnil; | |
2083 | ||
2084 | /* Initialize `window-system', unless init_display already decided it. */ | |
2085 | #ifdef CANNOT_DUMP | |
2086 | if (noninteractive) | |
2087 | #endif | |
2088 | { | |
2089 | Vwindow_system = Qnil; | |
2090 | Vwindow_system_version = Qnil; | |
2091 | } | |
2092 | } | |
2093 |