Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
d1af74e9 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1990, 1992 Free Software Foundation, Inc. |
4588ec20 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 <signal.h> | |
22 | ||
23 | #include "config.h" | |
24 | #include <stdio.h> | |
25 | #include <ctype.h> | |
26 | ||
4588ec20 JB |
27 | #include "termchar.h" |
28 | #include "termopts.h" | |
29 | #include "cm.h" | |
30 | #include "lisp.h" | |
31 | #include "dispextern.h" | |
32 | #include "buffer.h" | |
502b9b64 | 33 | #include "frame.h" |
4588ec20 JB |
34 | #include "window.h" |
35 | #include "commands.h" | |
36 | #include "disptab.h" | |
37 | #include "indent.h" | |
38 | ||
a41f8bed JB |
39 | #include "systerm.h" |
40 | #include "systime.h" | |
41 | ||
4588ec20 JB |
42 | #ifdef HAVE_X_WINDOWS |
43 | #include "xterm.h" | |
44 | #endif /* HAVE_X_WINDOWS */ | |
45 | ||
46 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
47 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
48 | ||
49 | #ifndef PENDING_OUTPUT_COUNT | |
50 | /* Get number of chars of output now in the buffer of a stdio stream. | |
51 | This ought to be built in in stdio, but it isn't. | |
52 | Some s- files override this because their stdio internals differ. */ | |
53 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) | |
54 | #endif | |
55 | ||
a41f8bed | 56 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 57 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 58 | |
502b9b64 | 59 | int frame_garbaged; |
4588ec20 JB |
60 | |
61 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
62 | ||
63 | int display_completed; | |
64 | ||
65 | /* Lisp variable visible-bell; enables use of screen-flash | |
66 | instead of audible bell. */ | |
67 | ||
68 | int visible_bell; | |
69 | ||
502b9b64 | 70 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
71 | |
72 | int inverse_video; | |
73 | ||
74 | /* Line speed of the terminal. */ | |
75 | ||
76 | int baud_rate; | |
77 | ||
78 | /* nil or a symbol naming the window system under which emacs is | |
79 | running ('x is the only current possibility). */ | |
80 | ||
81 | Lisp_Object Vwindow_system; | |
82 | ||
83 | /* Version number of X windows: 10, 11 or nil. */ | |
84 | Lisp_Object Vwindow_system_version; | |
85 | ||
86 | /* Vector of glyph definitions. Indexed by glyph number, | |
87 | the contents are a string which is how to output the glyph. | |
88 | ||
89 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
90 | as a character code. */ | |
91 | ||
92 | Lisp_Object Vglyph_table; | |
93 | ||
94 | /* Display table to use for vectors that don't specify their own. */ | |
95 | ||
96 | Lisp_Object Vstandard_display_table; | |
97 | ||
98 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
99 | so put cursor on minibuffer after the prompt. |
100 | positive means at end of text in echo area; | |
101 | negative means at beginning of line. */ | |
4588ec20 JB |
102 | int cursor_in_echo_area; |
103 | \f | |
502b9b64 JB |
104 | /* The currently selected frame. |
105 | In a single-frame version, this variable always remains 0. */ | |
4588ec20 | 106 | |
502b9b64 | 107 | FRAME_PTR selected_frame; |
4588ec20 | 108 | |
502b9b64 JB |
109 | /* A frame which is not just a minibuffer, or 0 if there are no such |
110 | frames. This is usually the most recent such frame that was | |
111 | selected. In a single-frame version, this variable always remains 0. */ | |
112 | FRAME_PTR last_nonminibuf_frame; | |
e5d77022 | 113 | |
502b9b64 | 114 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
115 | exist inside frame objects lives in the following structure instead. |
116 | ||
117 | NOTE: the_only_frame is not checked for garbage collection; don't | |
118 | store collectable objects in any of its fields! | |
119 | ||
120 | You're not/The only frame in town/... */ | |
4588ec20 | 121 | |
502b9b64 JB |
122 | #ifndef MULTI_FRAME |
123 | struct frame the_only_frame; | |
e5d77022 | 124 | #endif |
4588ec20 JB |
125 | |
126 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
127 | which is used inside `update_frame' to hold the old contents |
128 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
129 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
130 | /* Length of vector currently allocated. */ |
131 | int ophys_lines_length; | |
132 | ||
133 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
134 | ||
135 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
136 | ||
137 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
138 | ||
4588ec20 | 139 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 140 | \f |
502b9b64 | 141 | #ifdef MULTI_FRAME |
4588ec20 | 142 | |
502b9b64 JB |
143 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
144 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
145 | (frame) | |
146 | Lisp_Object frame; | |
4588ec20 | 147 | { |
502b9b64 | 148 | FRAME_PTR f; |
4588ec20 | 149 | |
502b9b64 JB |
150 | CHECK_LIVE_FRAME (frame, 0); |
151 | f = XFRAME (frame); | |
152 | update_begin (f); | |
4588ec20 | 153 | /* set_terminal_modes (); */ |
502b9b64 | 154 | clear_frame (); |
b6a65ac2 | 155 | clear_frame_records (f); |
502b9b64 | 156 | update_end (f); |
4588ec20 | 157 | fflush (stdout); |
4588ec20 JB |
158 | windows_or_buffers_changed++; |
159 | /* Mark all windows as INaccurate, | |
160 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
161 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
162 | f->garbaged = 0; | |
4588ec20 JB |
163 | return Qnil; |
164 | } | |
165 | ||
166 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
502b9b64 | 167 | "Redraw all frames marked as having their images garbled.") |
4588ec20 JB |
168 | () |
169 | { | |
502b9b64 | 170 | Lisp_Object frame, tail; |
4588ec20 | 171 | |
502b9b64 | 172 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
4588ec20 | 173 | { |
502b9b64 JB |
174 | frame = XCONS (tail)->car; |
175 | if (XFRAME (frame)->garbaged && XFRAME (frame)->visible) | |
176 | Fredraw_frame (frame); | |
4588ec20 JB |
177 | } |
178 | return Qnil; | |
179 | } | |
180 | ||
502b9b64 JB |
181 | redraw_frame (f) |
182 | FRAME_PTR f; | |
4588ec20 | 183 | { |
502b9b64 JB |
184 | Lisp_Object frame; |
185 | XSET (frame, Lisp_Frame, f); | |
186 | Fredraw_frame (frame); | |
4588ec20 JB |
187 | } |
188 | ||
502b9b64 | 189 | #else /* not MULTI_FRAME */ |
4588ec20 JB |
190 | |
191 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, 0, | |
192 | "Clear screen and output again what is supposed to appear on it.") | |
193 | () | |
194 | { | |
195 | update_begin (0); | |
196 | set_terminal_modes (); | |
502b9b64 | 197 | clear_frame (); |
4588ec20 JB |
198 | update_end (0); |
199 | fflush (stdout); | |
502b9b64 | 200 | clear_frame_records (0); |
4588ec20 JB |
201 | windows_or_buffers_changed++; |
202 | /* Mark all windows as INaccurate, | |
203 | so that every window will have its redisplay done. */ | |
851c1205 | 204 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0)); |
4588ec20 JB |
205 | return Qnil; |
206 | } | |
207 | ||
502b9b64 | 208 | #endif /* not MULTI_FRAME */ |
4588ec20 | 209 | \f |
502b9b64 JB |
210 | static struct frame_glyphs * |
211 | make_frame_glyphs (frame, empty) | |
212 | register FRAME_PTR frame; | |
4588ec20 JB |
213 | int empty; |
214 | { | |
215 | register int i; | |
502b9b64 JB |
216 | register width = FRAME_WIDTH (frame); |
217 | register height = FRAME_HEIGHT (frame); | |
218 | register struct frame_glyphs *new = | |
219 | (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 220 | |
502b9b64 | 221 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
222 | new->height = height; |
223 | new->width = width; | |
224 | new->used = (int *) xmalloc (height * sizeof (int)); | |
225 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
226 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
227 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
228 | bzero (new->enable, height * sizeof (char)); | |
229 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
230 | ||
231 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 232 | if (FRAME_X_P (frame)) |
4588ec20 JB |
233 | { |
234 | new->nruns = (int *) xmalloc (height * sizeof (int)); | |
235 | new->face_list | |
236 | = (struct run **) xmalloc (height * sizeof (struct run *)); | |
237 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); | |
238 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
239 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
240 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
241 | } | |
242 | #endif | |
243 | ||
244 | if (empty) | |
245 | { | |
246 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 247 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 JB |
248 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
249 | ||
250 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
251 | bzero (new->total_contents, total_glyphs); | |
252 | } | |
253 | else | |
254 | { | |
255 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
256 | ||
257 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
258 | bzero (new->total_contents, total_glyphs); | |
259 | for (i = 0; i < height; i++) | |
260 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
261 | } | |
262 | ||
263 | return new; | |
264 | } | |
265 | ||
266 | static void | |
502b9b64 JB |
267 | free_frame_glyphs (frame, glyphs) |
268 | FRAME_PTR frame; | |
269 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
270 | { |
271 | if (glyphs->total_contents) | |
272 | free (glyphs->total_contents); | |
273 | ||
274 | free (glyphs->used); | |
275 | free (glyphs->glyphs); | |
276 | free (glyphs->highlight); | |
277 | free (glyphs->enable); | |
278 | free (glyphs->bufp); | |
279 | ||
280 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 281 | if (FRAME_X_P (frame)) |
4588ec20 JB |
282 | { |
283 | free (glyphs->nruns); | |
284 | free (glyphs->face_list); | |
285 | free (glyphs->top_left_x); | |
286 | free (glyphs->top_left_y); | |
287 | free (glyphs->pix_width); | |
288 | free (glyphs->pix_height); | |
289 | } | |
290 | #endif | |
291 | ||
292 | free (glyphs); | |
293 | } | |
294 | ||
295 | static void | |
502b9b64 JB |
296 | remake_frame_glyphs (frame) |
297 | FRAME_PTR frame; | |
4588ec20 | 298 | { |
502b9b64 JB |
299 | if (FRAME_CURRENT_GLYPHS (frame)) |
300 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
301 | if (FRAME_DESIRED_GLYPHS (frame)) | |
302 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
303 | if (FRAME_TEMP_GLYPHS (frame)) | |
304 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
305 | ||
306 | if (FRAME_MESSAGE_BUF (frame)) | |
307 | FRAME_MESSAGE_BUF (frame) | |
308 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
309 | FRAME_WIDTH (frame) + 1); | |
4588ec20 | 310 | else |
502b9b64 JB |
311 | FRAME_MESSAGE_BUF (frame) |
312 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 313 | |
502b9b64 JB |
314 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
315 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
316 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
317 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
318 | } |
319 | \f | |
502b9b64 | 320 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
321 | |
322 | static int | |
323 | line_hash_code (m, vpos) | |
502b9b64 | 324 | register struct frame_glyphs *m; |
4588ec20 JB |
325 | int vpos; |
326 | { | |
327 | register GLYPH *body, *end; | |
328 | register int h = 0; | |
329 | ||
330 | if (!m->enable[vpos]) | |
331 | return 0; | |
332 | ||
333 | /* Give all lighlighted lines the same hash code | |
334 | so as to encourage scrolling to leave them in place. */ | |
335 | if (m->highlight[vpos]) | |
336 | return -1; | |
337 | ||
338 | body = m->glyphs[vpos]; | |
339 | ||
340 | if (must_write_spaces) | |
341 | while (1) | |
342 | { | |
343 | GLYPH g = *body++; | |
344 | ||
345 | if (g == 0) | |
346 | break; | |
347 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
348 | } | |
349 | else | |
350 | while (1) | |
351 | { | |
352 | GLYPH g = *body++; | |
353 | ||
354 | if (g == 0) | |
355 | break; | |
356 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
357 | } | |
358 | ||
359 | if (h) | |
360 | return h; | |
361 | return 1; | |
362 | } | |
363 | ||
364 | /* Return number of characters in line in M at vpos VPOS, | |
365 | except don't count leading and trailing spaces | |
366 | unless the terminal requires those to be explicitly output. */ | |
367 | ||
368 | static unsigned int | |
369 | line_draw_cost (m, vpos) | |
502b9b64 | 370 | struct frame_glyphs *m; |
4588ec20 JB |
371 | int vpos; |
372 | { | |
373 | register GLYPH *beg = m->glyphs[vpos]; | |
374 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
375 | register int i; | |
376 | register int tlen = GLYPH_TABLE_LENGTH; | |
377 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
378 | ||
379 | /* Ignore trailing and leading spaces if we can. */ | |
380 | if (!must_write_spaces) | |
381 | { | |
382 | while ((end != beg) && (*end == SPACEGLYPH)) | |
383 | --end; | |
384 | if (end == beg) | |
385 | return (0); /* All blank line. */ | |
386 | ||
387 | while (*beg == SPACEGLYPH) | |
388 | ++beg; | |
389 | } | |
390 | ||
391 | /* If we don't have a glyph-table, each glyph is one character, | |
392 | so return the number of glyphs. */ | |
393 | if (tbase == 0) | |
394 | return end - beg; | |
395 | ||
396 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
397 | i = 0; | |
398 | while ((beg <= end) && *beg) | |
399 | { | |
400 | register GLYPH g = *beg++; | |
401 | ||
402 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
403 | i += 1; | |
404 | else | |
405 | i += GLYPH_LENGTH (tbase, g); | |
406 | } | |
407 | return i; | |
408 | } | |
409 | \f | |
410 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
411 | ||
412 | The only other interface into redisplay is through setting | |
502b9b64 JB |
413 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
414 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
415 | |
416 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
417 | ||
502b9b64 | 418 | cancel_line (vpos, frame) |
4588ec20 | 419 | int vpos; |
502b9b64 | 420 | register FRAME_PTR frame; |
4588ec20 | 421 | { |
502b9b64 | 422 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
423 | } |
424 | ||
502b9b64 JB |
425 | clear_frame_records (frame) |
426 | register FRAME_PTR frame; | |
4588ec20 | 427 | { |
502b9b64 | 428 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
429 | } |
430 | ||
431 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
432 | ||
433 | void | |
502b9b64 JB |
434 | get_display_line (frame, vpos, hpos) |
435 | register FRAME_PTR frame; | |
4588ec20 JB |
436 | int vpos; |
437 | register int hpos; | |
438 | { | |
502b9b64 JB |
439 | register struct frame_glyphs *glyphs; |
440 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
441 | register GLYPH *p; |
442 | ||
502b9b64 | 443 | if (vpos < 0 || (! FRAME_VISIBLE_P (frame))) |
4588ec20 JB |
444 | abort (); |
445 | ||
446 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
447 | abort (); | |
448 | ||
449 | if (! desired_glyphs->enable[vpos]) | |
450 | { | |
451 | desired_glyphs->used[vpos] = 0; | |
452 | desired_glyphs->highlight[vpos] = 0; | |
453 | desired_glyphs->enable[vpos] = 1; | |
454 | } | |
455 | ||
456 | if (hpos > desired_glyphs->used[vpos]) | |
457 | { | |
458 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
459 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
460 | ||
461 | desired_glyphs->used[vpos] = hpos; | |
462 | while (g != end) | |
463 | *g++ = SPACEGLYPH; | |
464 | } | |
465 | } | |
466 | ||
467 | /* Like bcopy except never gets confused by overlap. */ | |
468 | ||
469 | void | |
470 | safe_bcopy (from, to, size) | |
471 | char *from, *to; | |
472 | int size; | |
473 | { | |
474 | register char *endf; | |
475 | register char *endt; | |
476 | ||
477 | if (size == 0) | |
478 | return; | |
479 | ||
480 | /* If destination is higher in memory, and overlaps source zone, | |
481 | copy from the end. */ | |
482 | if (from < to && from + size > to) | |
483 | { | |
484 | endf = from + size; | |
485 | endt = to + size; | |
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 | |
491 | anywhere. Since I don't think the obvious copy loop is ever | |
492 | too bad, I'm trying to err in its favor. */ | |
493 | if (to - from < 64) | |
494 | { | |
495 | do | |
496 | *--endt = *--endf; | |
497 | while (endf != from); | |
498 | } | |
499 | else | |
500 | { | |
98038dc0 JB |
501 | /* Since TO - FROM >= 64, the overlap is less than SIZE, |
502 | so we can always safely do this loop once. */ | |
4588ec20 JB |
503 | while (endt > to) |
504 | { | |
505 | endt -= (to - from); | |
506 | endf -= (to - from); | |
507 | ||
508 | bcopy (endf, endt, to - from); | |
509 | } | |
510 | ||
511 | /* If TO - FROM wasn't a multiple of SIZE, there will be a | |
512 | little left over. The amount left over is | |
513 | (endt + (to - from)) - to, which is endt - from. */ | |
514 | bcopy (from, to, endt - from); | |
515 | } | |
516 | } | |
517 | else | |
518 | bcopy (from, to, size); | |
519 | } | |
520 | ||
521 | #if 0 | |
522 | void | |
523 | safe_bcopy (from, to, size) | |
524 | char *from, *to; | |
525 | int size; | |
526 | { | |
527 | register char *endf; | |
528 | register char *endt; | |
529 | ||
530 | if (size == 0) | |
531 | return; | |
532 | ||
533 | /* If destination is higher in memory, and overlaps source zone, | |
534 | copy from the end. */ | |
535 | if (from < to && from + size > to) | |
536 | { | |
537 | endf = from + size; | |
538 | endt = to + size; | |
539 | ||
540 | do | |
541 | *--endt = *--endf; | |
542 | while (endf != from); | |
543 | ||
544 | return; | |
545 | } | |
546 | ||
547 | bcopy (from, to, size); | |
548 | } | |
549 | #endif | |
550 | ||
98038dc0 | 551 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
552 | DISTANCE may be negative. */ |
553 | ||
554 | static void | |
555 | rotate_vector (vector, size, distance) | |
556 | char *vector; | |
557 | int size; | |
558 | int distance; | |
559 | { | |
560 | char *temp = (char *) alloca (size); | |
561 | ||
562 | if (distance < 0) | |
563 | distance += size; | |
564 | ||
565 | bcopy (vector, temp + distance, size - distance); | |
566 | bcopy (vector + size - distance, temp, distance); | |
567 | bcopy (temp, vector, size); | |
568 | } | |
569 | ||
570 | /* Scroll lines from vpos FROM up to but not including vpos END | |
571 | down by AMOUNT lines (AMOUNT may be negative). | |
572 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
573 | ||
574 | int | |
502b9b64 JB |
575 | scroll_frame_lines (frame, from, end, amount) |
576 | register FRAME_PTR frame; | |
4588ec20 JB |
577 | int from, end, amount; |
578 | { | |
579 | register int i; | |
502b9b64 JB |
580 | register struct frame_glyphs *current_frame |
581 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
582 | |
583 | if (!line_ins_del_ok) | |
584 | return 0; | |
585 | ||
586 | if (amount == 0) | |
587 | return 1; | |
588 | ||
589 | if (amount > 0) | |
590 | { | |
502b9b64 | 591 | update_begin (frame); |
4588ec20 JB |
592 | set_terminal_window (end + amount); |
593 | if (!scroll_region_ok) | |
594 | ins_del_lines (end, -amount); | |
595 | ins_del_lines (from, amount); | |
596 | set_terminal_window (0); | |
597 | ||
502b9b64 | 598 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
599 | sizeof (GLYPH *) * (end + amount - from), |
600 | amount * sizeof (GLYPH *)); | |
601 | ||
502b9b64 JB |
602 | safe_bcopy (current_frame->used + from, |
603 | current_frame->used + from + amount, | |
604 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 605 | |
502b9b64 JB |
606 | safe_bcopy (current_frame->highlight + from, |
607 | current_frame->highlight + from + amount, | |
608 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 609 | |
502b9b64 JB |
610 | safe_bcopy (current_frame->enable + from, |
611 | current_frame->enable + from + amount, | |
612 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
613 | |
614 | /* Mark the lines made empty by scrolling as enabled, empty and | |
615 | normal video. */ | |
502b9b64 JB |
616 | bzero (current_frame->used + from, |
617 | amount * sizeof current_frame->used[0]); | |
618 | bzero (current_frame->highlight + from, | |
619 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
620 | for (i = from; i < from + amount; i++) |
621 | { | |
502b9b64 JB |
622 | current_frame->glyphs[i][0] = '\0'; |
623 | current_frame->enable[i] = 1; | |
4588ec20 JB |
624 | } |
625 | ||
502b9b64 JB |
626 | safe_bcopy (current_frame->bufp + from, |
627 | current_frame->bufp + from + amount, | |
628 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
629 | |
630 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 631 | if (FRAME_X_P (frame)) |
4588ec20 | 632 | { |
502b9b64 JB |
633 | safe_bcopy (current_frame->nruns + from, |
634 | current_frame->nruns + from + amount, | |
635 | (end - from) * sizeof current_frame->nruns[0]); | |
4588ec20 | 636 | |
502b9b64 JB |
637 | safe_bcopy (current_frame->face_list + from, |
638 | current_frame->face_list + from + amount, | |
639 | (end - from) * sizeof current_frame->face_list[0]); | |
4588ec20 | 640 | |
502b9b64 JB |
641 | safe_bcopy (current_frame->top_left_x + from, |
642 | current_frame->top_left_x + from + amount, | |
643 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 644 | |
502b9b64 JB |
645 | safe_bcopy (current_frame->top_left_y + from, |
646 | current_frame->top_left_y + from + amount, | |
647 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 648 | |
502b9b64 JB |
649 | safe_bcopy (current_frame->pix_width + from, |
650 | current_frame->pix_width + from + amount, | |
651 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 652 | |
502b9b64 JB |
653 | safe_bcopy (current_frame->pix_height + from, |
654 | current_frame->pix_height + from + amount, | |
655 | (end - from) * sizeof current_frame->pix_height[0]); | |
4588ec20 JB |
656 | } |
657 | #endif /* HAVE_X_WINDOWS */ | |
658 | ||
502b9b64 | 659 | update_end (frame); |
4588ec20 JB |
660 | } |
661 | if (amount < 0) | |
662 | { | |
502b9b64 | 663 | update_begin (frame); |
4588ec20 JB |
664 | set_terminal_window (end); |
665 | ins_del_lines (from + amount, amount); | |
666 | if (!scroll_region_ok) | |
667 | ins_del_lines (end + amount, -amount); | |
668 | set_terminal_window (0); | |
669 | ||
502b9b64 | 670 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
671 | sizeof (GLYPH *) * (end - from - amount), |
672 | amount * sizeof (GLYPH *)); | |
673 | ||
502b9b64 JB |
674 | safe_bcopy (current_frame->used + from, |
675 | current_frame->used + from + amount, | |
676 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 677 | |
502b9b64 JB |
678 | safe_bcopy (current_frame->highlight + from, |
679 | current_frame->highlight + from + amount, | |
680 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 681 | |
502b9b64 JB |
682 | safe_bcopy (current_frame->enable + from, |
683 | current_frame->enable + from + amount, | |
684 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
685 | |
686 | /* Mark the lines made empty by scrolling as enabled, empty and | |
687 | normal video. */ | |
502b9b64 JB |
688 | bzero (current_frame->used + end + amount, |
689 | - amount * sizeof current_frame->used[0]); | |
690 | bzero (current_frame->highlight + end + amount, | |
691 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
692 | for (i = end + amount; i < end; i++) |
693 | { | |
502b9b64 JB |
694 | current_frame->glyphs[i][0] = '\0'; |
695 | current_frame->enable[i] = 1; | |
4588ec20 JB |
696 | } |
697 | ||
502b9b64 JB |
698 | safe_bcopy (current_frame->bufp + from, |
699 | current_frame->bufp + from + amount, | |
700 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
701 | |
702 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 703 | if (FRAME_X_P (frame)) |
4588ec20 | 704 | { |
502b9b64 JB |
705 | safe_bcopy (current_frame->nruns + from, |
706 | current_frame->nruns + from + amount, | |
707 | (end - from) * sizeof current_frame->nruns[0]); | |
4588ec20 | 708 | |
502b9b64 JB |
709 | safe_bcopy (current_frame->face_list + from, |
710 | current_frame->face_list + from + amount, | |
711 | (end - from) * sizeof current_frame->face_list[0]); | |
4588ec20 | 712 | |
502b9b64 JB |
713 | safe_bcopy (current_frame->top_left_x + from, |
714 | current_frame->top_left_x + from + amount, | |
715 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 716 | |
502b9b64 JB |
717 | safe_bcopy (current_frame->top_left_y + from, |
718 | current_frame->top_left_y + from + amount, | |
719 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 720 | |
502b9b64 JB |
721 | safe_bcopy (current_frame->pix_width + from, |
722 | current_frame->pix_width + from + amount, | |
723 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 724 | |
502b9b64 JB |
725 | safe_bcopy (current_frame->pix_height + from, |
726 | current_frame->pix_height + from + amount, | |
727 | (end - from) * sizeof current_frame->pix_height[0]); | |
4588ec20 JB |
728 | } |
729 | #endif /* HAVE_X_WINDOWS */ | |
730 | ||
502b9b64 | 731 | update_end (frame); |
4588ec20 JB |
732 | } |
733 | return 1; | |
734 | } | |
735 | \f | |
502b9b64 | 736 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 737 | copy all the columns that W does not occupy |
502b9b64 JB |
738 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
739 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
740 | |
741 | preserve_other_columns (w) | |
742 | struct window *w; | |
743 | { | |
744 | register int vpos; | |
502b9b64 JB |
745 | register struct frame_glyphs *current_frame, *desired_frame; |
746 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
747 | int start = XFASTINT (w->left); |
748 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
749 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
750 | ||
502b9b64 JB |
751 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
752 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
753 | |
754 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
755 | { | |
502b9b64 | 756 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
757 | { |
758 | if (start > 0) | |
759 | { | |
760 | int len; | |
761 | ||
502b9b64 JB |
762 | bcopy (current_frame->glyphs[vpos], |
763 | desired_frame->glyphs[vpos], start); | |
764 | len = min (start, current_frame->used[vpos]); | |
765 | if (desired_frame->used[vpos] < len) | |
766 | desired_frame->used[vpos] = len; | |
4588ec20 | 767 | } |
502b9b64 JB |
768 | if (current_frame->used[vpos] > end |
769 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 770 | { |
502b9b64 JB |
771 | while (desired_frame->used[vpos] < end) |
772 | desired_frame->glyphs[vpos][desired_frame->used[vpos]++] | |
4588ec20 | 773 | = SPACEGLYPH; |
502b9b64 JB |
774 | bcopy (current_frame->glyphs[vpos] + end, |
775 | desired_frame->glyphs[vpos] + end, | |
776 | current_frame->used[vpos] - end); | |
777 | desired_frame->used[vpos] = current_frame->used[vpos]; | |
4588ec20 JB |
778 | } |
779 | } | |
780 | } | |
781 | } | |
782 | \f | |
783 | #if 0 | |
784 | ||
502b9b64 | 785 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 786 | copy all the columns that w does occupy |
502b9b64 JB |
787 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
788 | so that update_frame will not change those columns. | |
4588ec20 JB |
789 | |
790 | Have not been able to figure out how to use this correctly. */ | |
791 | ||
792 | preserve_my_columns (w) | |
793 | struct window *w; | |
794 | { | |
795 | register int vpos, fin; | |
502b9b64 JB |
796 | register struct frame_glyphs *l1, *l2; |
797 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
798 | int start = XFASTINT (w->left); |
799 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
800 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
801 | ||
802 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
803 | { | |
502b9b64 JB |
804 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
805 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
806 | { |
807 | if (l2->length > start && l1->length < l2->length) | |
808 | { | |
809 | fin = l2->length; | |
810 | if (fin > end) fin = end; | |
811 | while (l1->length < start) | |
812 | l1->body[l1->length++] = ' '; | |
813 | bcopy (l2->body + start, l1->body + start, fin - start); | |
814 | l1->length = fin; | |
815 | } | |
816 | } | |
817 | } | |
818 | } | |
819 | ||
820 | #endif | |
821 | \f | |
822 | /* On discovering that the redisplay for a window was no good, | |
823 | cancel the columns of that window, so that when the window is | |
824 | displayed over again get_display_line will not complain. */ | |
825 | ||
826 | cancel_my_columns (w) | |
827 | struct window *w; | |
828 | { | |
829 | register int vpos; | |
502b9b64 JB |
830 | register struct frame_glyphs *desired_glyphs = |
831 | FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
832 | register int start = XFASTINT (w->left); |
833 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
834 | ||
835 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
836 | if (desired_glyphs->enable[vpos] | |
837 | && desired_glyphs->used[vpos] >= start) | |
838 | desired_glyphs->used[vpos] = start; | |
839 | } | |
840 | \f | |
502b9b64 | 841 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
842 | the necessary output for one change in the buffer. |
843 | They may return 0 meaning nothing was done if anything is difficult, | |
844 | or 1 meaning the output was performed properly. | |
502b9b64 | 845 | They assume that the frame was up to date before the buffer |
4588ec20 JB |
846 | change being displayed. THey make various other assumptions too; |
847 | see command_loop_1 where these are called. */ | |
848 | ||
849 | int | |
850 | direct_output_for_insert (g) | |
851 | int g; | |
852 | { | |
502b9b64 JB |
853 | register FRAME_PTR frame = selected_frame; |
854 | register struct frame_glyphs *current_frame | |
855 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
856 | |
857 | #ifndef COMPILER_REGISTER_BUG | |
858 | register | |
859 | #endif /* COMPILER_REGISTER_BUG */ | |
860 | struct window *w = XWINDOW (selected_window); | |
861 | #ifndef COMPILER_REGISTER_BUG | |
862 | register | |
863 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 864 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
865 | #ifndef COMPILER_REGISTER_BUG |
866 | register | |
867 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 868 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 JB |
869 | |
870 | /* Give up if about to continue line */ | |
871 | if (hpos - XFASTINT (w->left) + 1 + 1 >= XFASTINT (w->width) | |
872 | ||
873 | /* Avoid losing if cursor is in invisible text off left margin */ | |
874 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
875 | ||
876 | /* Give up if cursor outside window (in minibuf, probably) */ | |
502b9b64 JB |
877 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
878 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 879 | |
502b9b64 | 880 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
881 | || !display_completed |
882 | ||
883 | /* Give up if buffer appears in two places. */ | |
884 | || buffer_shared > 1 | |
885 | ||
886 | /* Give up if w is minibuffer and a message is being displayed there */ | |
887 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
888 | return 0; | |
889 | ||
502b9b64 | 890 | current_frame->glyphs[vpos][hpos] = g; |
4588ec20 JB |
891 | unchanged_modified = MODIFF; |
892 | beg_unchanged = GPT - BEG; | |
893 | XFASTINT (w->last_point) = point; | |
894 | XFASTINT (w->last_point_x) = hpos; | |
895 | XFASTINT (w->last_modified) = MODIFF; | |
896 | ||
897 | reassert_line_highlight (0, vpos); | |
502b9b64 | 898 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 899 | fflush (stdout); |
502b9b64 JB |
900 | ++FRAME_CURSOR_X (frame); |
901 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 902 | { |
502b9b64 JB |
903 | current_frame->used[vpos] = hpos + 1; |
904 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
905 | } |
906 | ||
907 | return 1; | |
908 | } | |
909 | ||
910 | int | |
911 | direct_output_forward_char (n) | |
912 | int n; | |
913 | { | |
502b9b64 | 914 | register FRAME_PTR frame = selected_frame; |
4588ec20 JB |
915 | register struct window *w = XWINDOW (selected_window); |
916 | ||
a9764248 JB |
917 | /* Avoid losing if cursor is in invisible text off left margin |
918 | or about to go off either side of window. */ | |
502b9b64 | 919 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
920 | && (XINT (w->hscroll) || n < 0)) |
921 | || (n > 0 | |
502b9b64 | 922 | && (FRAME_CURSOR_X (frame) + 1 |
a9764248 | 923 | >= (XFASTINT (w->left) + XFASTINT (w->width) |
502b9b64 | 924 | - (XFASTINT (w->width) < FRAME_WIDTH (frame)) |
a9764248 | 925 | - 1)))) |
4588ec20 JB |
926 | return 0; |
927 | ||
502b9b64 JB |
928 | FRAME_CURSOR_X (frame) += n; |
929 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); | |
4588ec20 | 930 | XFASTINT (w->last_point) = point; |
502b9b64 | 931 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 JB |
932 | fflush (stdout); |
933 | return 1; | |
934 | } | |
935 | \f | |
936 | static void update_line (); | |
937 | ||
502b9b64 | 938 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
939 | Value is nonzero if redisplay stopped due to pending input. |
940 | FORCE nonzero means do not stop for pending input. */ | |
941 | ||
942 | int | |
502b9b64 JB |
943 | update_frame (f, force, inhibit_hairy_id) |
944 | FRAME_PTR f; | |
4588ec20 JB |
945 | int force; |
946 | int inhibit_hairy_id; | |
947 | { | |
502b9b64 JB |
948 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (f); |
949 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (f); | |
4588ec20 JB |
950 | register int i; |
951 | int pause; | |
952 | int preempt_count = baud_rate / 2400 + 1; | |
953 | extern input_pending; | |
954 | #ifdef HAVE_X_WINDOWS | |
955 | register int downto, leftmost; | |
956 | #endif | |
957 | ||
502b9b64 | 958 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
959 | |
960 | detect_input_pending (); | |
961 | if (input_pending && !force) | |
962 | { | |
963 | pause = 1; | |
964 | goto do_pause; | |
965 | } | |
966 | ||
502b9b64 | 967 | update_begin (f); |
4588ec20 JB |
968 | |
969 | if (!line_ins_del_ok) | |
970 | inhibit_hairy_id = 1; | |
971 | ||
efb859b4 JB |
972 | /* See if any of the desired lines are enabled; don't compute for |
973 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
974 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
975 | if (desired_frame->enable[i]) | |
4588ec20 JB |
976 | break; |
977 | ||
978 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
979 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
980 | force |= scrolling (f); | |
4588ec20 JB |
981 | |
982 | /* Update the individual lines as needed. Do bottom line first. */ | |
983 | ||
502b9b64 JB |
984 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
985 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
986 | |
987 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 988 | if (FRAME_X_P (f)) |
4588ec20 | 989 | { |
502b9b64 JB |
990 | leftmost = downto = f->display.x->internal_border_width; |
991 | if (desired_frame->enable[0]) | |
4588ec20 | 992 | { |
502b9b64 JB |
993 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
994 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
995 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
996 | - LINE_HEIGHT(f, FRAME_HEIGHT (f) - 1); | |
997 | current_frame->top_left_x[0] = leftmost; | |
998 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
999 | } |
1000 | } | |
1001 | #endif /* HAVE_X_WINDOWS */ | |
1002 | ||
1003 | /* Now update the rest of the lines. */ | |
502b9b64 | 1004 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1005 | { |
502b9b64 | 1006 | if (desired_frame->enable[i]) |
4588ec20 | 1007 | { |
b6a65ac2 | 1008 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1009 | { |
1010 | /* Flush out every so many lines. | |
1011 | Also flush out if likely to have more than 1k buffered | |
1012 | otherwise. I'm told that some telnet connections get | |
1013 | really screwed by more than 1k output at once. */ | |
1014 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1015 | if (outq > 900 | |
1016 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1017 | { | |
1018 | fflush (stdout); | |
1019 | if (preempt_count == 1) | |
1020 | { | |
a41f8bed JB |
1021 | #ifdef EMACS_OUTQSIZE |
1022 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1023 | /* Probably not a tty. Ignore the error and reset |
1024 | * the outq count. */ | |
1025 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1026 | #endif | |
1027 | outq *= 10; | |
1028 | sleep (outq / baud_rate); | |
1029 | } | |
1030 | } | |
1031 | if ((i - 1) % preempt_count == 0) | |
1032 | detect_input_pending (); | |
1033 | } | |
1034 | ||
502b9b64 | 1035 | update_line (f, i); |
4588ec20 | 1036 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1037 | if (FRAME_X_P (f)) |
4588ec20 | 1038 | { |
502b9b64 JB |
1039 | current_frame->top_left_y[i] = downto; |
1040 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1041 | } |
1042 | #endif /* HAVE_X_WINDOWS */ | |
1043 | } | |
1044 | ||
e5d77022 | 1045 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1046 | if (FRAME_X_P (f)) |
502b9b64 | 1047 | downto += LINE_HEIGHT(f, i); |
e5d77022 | 1048 | #endif |
4588ec20 | 1049 | } |
502b9b64 | 1050 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1051 | |
1052 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1053 | if (!pause) | |
1054 | { | |
1113d9db JB |
1055 | if (cursor_in_echo_area) |
1056 | { | |
502b9b64 | 1057 | if (f == selected_frame |
1113d9db | 1058 | && cursor_in_echo_area < 0) |
502b9b64 JB |
1059 | cursor_to (FRAME_HEIGHT (f) - 1, 0); |
1060 | else if (f == selected_frame | |
1061 | && ! current_frame->enable[FRAME_HEIGHT (f) - 1]) | |
1062 | cursor_to (FRAME_HEIGHT (f) - 1, 0); | |
1113d9db | 1063 | else |
502b9b64 JB |
1064 | cursor_to (FRAME_HEIGHT (f) - 1, |
1065 | min (FRAME_WIDTH (f) - 1, | |
1066 | current_frame->used[FRAME_HEIGHT (f) - 1])); | |
1113d9db | 1067 | } |
4588ec20 | 1068 | else |
502b9b64 JB |
1069 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1070 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1071 | } |
1072 | ||
502b9b64 | 1073 | update_end (f); |
4588ec20 JB |
1074 | |
1075 | if (termscript) | |
1076 | fflush (termscript); | |
1077 | fflush (stdout); | |
1078 | ||
1079 | /* Here if output is preempted because input is detected. */ | |
1080 | do_pause: | |
1081 | ||
502b9b64 | 1082 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1083 | display_completed = !pause; |
1084 | ||
502b9b64 | 1085 | bzero (desired_frame->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1086 | return pause; |
1087 | } | |
1088 | ||
1089 | /* Called when about to quit, to check for doing so | |
1090 | at an improper time. */ | |
1091 | ||
1092 | void | |
1093 | quit_error_check () | |
1094 | { | |
502b9b64 | 1095 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1096 | return; |
502b9b64 | 1097 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1098 | abort (); |
502b9b64 | 1099 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1100 | abort (); |
1101 | } | |
1102 | \f | |
1103 | /* Decide what insert/delete line to do, and do it */ | |
1104 | ||
1105 | extern void scrolling_1 (); | |
1106 | ||
502b9b64 JB |
1107 | scrolling (frame) |
1108 | FRAME_PTR frame; | |
4588ec20 JB |
1109 | { |
1110 | int unchanged_at_top, unchanged_at_bottom; | |
1111 | int window_size; | |
1112 | int changed_lines; | |
502b9b64 JB |
1113 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1114 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1115 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
4588ec20 | 1116 | register int i; |
502b9b64 JB |
1117 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1118 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1119 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1120 | |
1121 | /* Compute hash codes of all the lines. | |
1122 | Also calculate number of changed lines, | |
1123 | number of unchanged lines at the beginning, | |
1124 | and number of unchanged lines at the end. */ | |
1125 | ||
1126 | changed_lines = 0; | |
1127 | unchanged_at_top = 0; | |
502b9b64 JB |
1128 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1129 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1130 | { |
1131 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1132 | if (!current_frame->enable[i]) |
4588ec20 | 1133 | return 0; |
502b9b64 JB |
1134 | old_hash[i] = line_hash_code (current_frame, i); |
1135 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1136 | new_hash[i] = old_hash[i]; |
1137 | else | |
502b9b64 | 1138 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1139 | |
1140 | if (old_hash[i] != new_hash[i]) | |
1141 | { | |
1142 | changed_lines++; | |
502b9b64 | 1143 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1144 | } |
1145 | else if (i == unchanged_at_top) | |
1146 | unchanged_at_top++; | |
502b9b64 | 1147 | draw_cost[i] = line_draw_cost (desired_frame, i); |
4588ec20 JB |
1148 | } |
1149 | ||
1150 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1151 | if (changed_lines < baud_rate / 2400 | |
502b9b64 | 1152 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1153 | return 1; |
1154 | ||
502b9b64 | 1155 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1156 | - unchanged_at_bottom); |
1157 | ||
1158 | if (scroll_region_ok) | |
1159 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1160 | else if (memory_below_frame) |
4588ec20 JB |
1161 | free_at_end_vpos = -1; |
1162 | ||
1163 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1164 | current frame and desired frame, don't bother with i/d calc. */ |
4588ec20 JB |
1165 | if (window_size >= 18 && baud_rate > 2400 |
1166 | && (window_size >= | |
1167 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1168 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1169 | old_hash, new_hash, draw_cost))) |
1170 | return 0; | |
1171 | ||
502b9b64 | 1172 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 JB |
1173 | draw_cost + unchanged_at_top - 1, |
1174 | old_hash + unchanged_at_top - 1, | |
1175 | new_hash + unchanged_at_top - 1, | |
1176 | free_at_end_vpos - unchanged_at_top); | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | \f | |
1181 | /* Return the offset in its buffer of the character at location col, line | |
1182 | in the given window. */ | |
1183 | int | |
1184 | buffer_posn_from_coords (window, col, line) | |
1185 | struct window *window; | |
1186 | int col, line; | |
1187 | { | |
1188 | int window_left = XFASTINT (window->left); | |
1189 | ||
1190 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1191 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1192 | window. */ | |
4588ec20 JB |
1193 | int window_width = (XFASTINT (window->width) - 1 |
1194 | - (XFASTINT (window->width) + window_left | |
502b9b64 | 1195 | != FRAME_WIDTH (XFRAME (window->frame)))); |
4588ec20 | 1196 | |
efb859b4 | 1197 | int startp = marker_position (window->start); |
4588ec20 JB |
1198 | |
1199 | /* Since compute_motion will only operate on the current buffer, | |
1200 | we need to save the old one and restore it when we're done. */ | |
1201 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1202 | struct position *posn; |
4588ec20 JB |
1203 | |
1204 | current_buffer = XBUFFER (window->buffer); | |
1205 | ||
502b9b64 JB |
1206 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1207 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1208 | the window, but it isn't maintained correctly, and I'm not even |
1209 | sure I will keep it. */ | |
1210 | posn = compute_motion (startp, 0, | |
1211 | (window == XWINDOW (minibuf_window) && startp == 1 | |
1212 | ? minibuf_prompt_width : 0), | |
1213 | ZV, line, col - window_left, | |
1214 | window_width, XINT (window->hscroll), 0); | |
4588ec20 JB |
1215 | |
1216 | current_buffer = old_current_buffer; | |
1217 | ||
502b9b64 | 1218 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1219 | to be *after* the newline, i.e. at the start of the next line. |
1220 | This is reasonable, but not really what we want. So if the | |
1221 | result is on a line below LINE, back it up one character. */ | |
1222 | if (posn->vpos > line) | |
1223 | return posn->bufpos - 1; | |
1224 | else | |
1225 | return posn->bufpos; | |
4588ec20 JB |
1226 | } |
1227 | \f | |
1228 | static int | |
1229 | count_blanks (r) | |
1230 | register GLYPH *r; | |
1231 | { | |
1232 | register GLYPH *p = r; | |
1233 | while (*r++ == SPACEGLYPH); | |
1234 | return r - p - 1; | |
1235 | } | |
1236 | ||
1237 | static int | |
1238 | count_match (str1, str2) | |
1239 | GLYPH *str1, *str2; | |
1240 | { | |
1241 | register GLYPH *p1 = str1; | |
1242 | register GLYPH *p2 = str2; | |
1243 | while (*p1++ == *p2++); | |
1244 | return p1 - str1 - 1; | |
1245 | } | |
1246 | ||
1247 | /* Char insertion/deletion cost vector, from term.c */ | |
1248 | extern int *char_ins_del_vector; | |
1249 | ||
502b9b64 | 1250 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_HEIGHT((f))]) |
4588ec20 JB |
1251 | |
1252 | static void | |
502b9b64 JB |
1253 | update_line (frame, vpos) |
1254 | register FRAME_PTR frame; | |
4588ec20 JB |
1255 | int vpos; |
1256 | { | |
1257 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1258 | int tem; | |
1259 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1260 | int save; | |
502b9b64 JB |
1261 | register struct frame_glyphs *current_frame |
1262 | = FRAME_CURRENT_GLYPHS (frame); | |
1263 | register struct frame_glyphs *desired_frame | |
1264 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1265 | |
502b9b64 JB |
1266 | if (desired_frame->highlight[vpos] |
1267 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1268 | { |
502b9b64 JB |
1269 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1270 | (current_frame->enable[vpos] ? | |
1271 | current_frame->used[vpos] : 0)); | |
1272 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1273 | } |
1274 | else | |
502b9b64 | 1275 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1276 | |
502b9b64 | 1277 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1278 | { |
1279 | olen = 0; | |
1280 | } | |
1281 | else | |
1282 | { | |
502b9b64 JB |
1283 | obody = current_frame->glyphs[vpos]; |
1284 | olen = current_frame->used[vpos]; | |
1285 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1286 | { |
1287 | if (!must_write_spaces) | |
1288 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1289 | olen--; | |
1290 | } | |
1291 | else | |
1292 | { | |
1293 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1294 | spaces all the way to the frame edge |
4588ec20 JB |
1295 | so that the reverse video extends all the way across. */ |
1296 | ||
502b9b64 | 1297 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1298 | obody[olen++] = SPACEGLYPH; |
1299 | } | |
1300 | } | |
1301 | ||
1302 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1303 | current_frame->enable[vpos] = 1; |
1304 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1305 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1306 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1307 | |
1308 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1309 | if (FRAME_X_P (frame)) |
4588ec20 | 1310 | { |
502b9b64 JB |
1311 | current_frame->pix_width[vpos] |
1312 | = current_frame->used[vpos] | |
1313 | * FONT_WIDTH (frame->display.x->font); | |
1314 | current_frame->pix_height[vpos] | |
1315 | = FONT_HEIGHT (frame->display.x->font); | |
4588ec20 JB |
1316 | } |
1317 | #endif /* HAVE_X_WINDOWS */ | |
1318 | ||
502b9b64 | 1319 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1320 | { |
1321 | nlen = 0; | |
1322 | goto just_erase; | |
1323 | } | |
1324 | ||
502b9b64 JB |
1325 | nbody = desired_frame->glyphs[vpos]; |
1326 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1327 | |
1328 | /* Pretend trailing spaces are not there at all, | |
1329 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1330 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1331 | { |
1332 | if (!must_write_spaces) | |
1333 | /* We know that the previous character byte contains 0. */ | |
1334 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1335 | nlen--; | |
1336 | } | |
1337 | else | |
1338 | { | |
1339 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1340 | all the way to the frame edge |
4588ec20 JB |
1341 | so that the reverse video extends all the way across. */ |
1342 | ||
502b9b64 | 1343 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1344 | nbody[nlen++] = SPACEGLYPH; |
1345 | } | |
1346 | ||
1347 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1348 | if (!char_ins_del_ok) | |
1349 | { | |
1350 | int i,j; | |
1351 | ||
1352 | for (i = 0; i < nlen; i++) | |
1353 | { | |
1354 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1355 | { | |
1356 | cursor_to (vpos, i); | |
1357 | for (j = 1; (i + j < nlen && | |
1358 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1359 | j++); | |
1360 | ||
1361 | /* Output this run of non-matching chars. */ | |
1362 | write_glyphs (nbody + i, j); | |
1363 | i += j - 1; | |
1364 | ||
1365 | /* Now find the next non-match. */ | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1370 | if (olen > nlen) | |
1371 | { | |
1372 | cursor_to (vpos, nlen); | |
1373 | clear_end_of_line (olen); | |
1374 | } | |
1375 | ||
502b9b64 JB |
1376 | /* Exchange contents between current_frame and new_frame. */ |
1377 | temp = desired_frame->glyphs[vpos]; | |
1378 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1379 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1380 | |
1381 | return; | |
1382 | } | |
1383 | ||
1384 | if (!olen) | |
1385 | { | |
502b9b64 | 1386 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1387 | ? 0 : count_blanks (nbody); |
1388 | if (nlen > nsp) | |
1389 | { | |
1390 | cursor_to (vpos, nsp); | |
1391 | write_glyphs (nbody + nsp, nlen - nsp); | |
1392 | } | |
1393 | ||
502b9b64 JB |
1394 | /* Exchange contents between current_frame and new_frame. */ |
1395 | temp = desired_frame->glyphs[vpos]; | |
1396 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1397 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1398 | |
1399 | return; | |
1400 | } | |
1401 | ||
1402 | obody[olen] = 1; | |
1403 | save = nbody[nlen]; | |
1404 | nbody[nlen] = 0; | |
1405 | ||
1406 | /* Compute number of leading blanks in old and new contents. */ | |
1407 | osp = count_blanks (obody); | |
502b9b64 | 1408 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1409 | nsp = count_blanks (nbody); |
1410 | else | |
1411 | nsp = 0; | |
1412 | ||
1413 | /* Compute number of matching chars starting with first nonblank. */ | |
1414 | begmatch = count_match (obody + osp, nbody + nsp); | |
1415 | ||
1416 | /* Spaces in new match implicit space past the end of old. */ | |
1417 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1418 | if (!must_write_spaces && osp + begmatch == olen) | |
1419 | { | |
1420 | np1 = nbody + nsp; | |
1421 | while (np1[begmatch] == SPACEGLYPH) | |
1422 | begmatch++; | |
1423 | } | |
1424 | ||
1425 | /* Avoid doing insert/delete char | |
1426 | just cause number of leading spaces differs | |
1427 | when the following text does not match. */ | |
1428 | if (begmatch == 0 && osp != nsp) | |
1429 | osp = nsp = min (osp, nsp); | |
1430 | ||
1431 | /* Find matching characters at end of line */ | |
1432 | op1 = obody + olen; | |
1433 | np1 = nbody + nlen; | |
1434 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1435 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1436 | { | |
1437 | op1--; | |
1438 | np1--; | |
1439 | } | |
1440 | endmatch = obody + olen - op1; | |
1441 | ||
1442 | /* Put correct value back in nbody[nlen]. | |
1443 | This is important because direct_output_for_insert | |
1444 | can write into the line at a later point. | |
1445 | If this screws up the zero at the end of the line, re-establish it. */ | |
1446 | nbody[nlen] = save; | |
1447 | obody[olen] = 0; | |
1448 | ||
1449 | /* tem gets the distance to insert or delete. | |
1450 | endmatch is how many characters we save by doing so. | |
1451 | Is it worth it? */ | |
1452 | ||
1453 | tem = (nlen - nsp) - (olen - osp); | |
1454 | if (endmatch && tem | |
502b9b64 | 1455 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1456 | endmatch = 0; |
1457 | ||
1458 | /* nsp - osp is the distance to insert or delete. | |
1459 | If that is nonzero, begmatch is known to be nonzero also. | |
1460 | begmatch + endmatch is how much we save by doing the ins/del. | |
1461 | Is it worth it? */ | |
1462 | ||
1463 | if (nsp != osp | |
1464 | && (!char_ins_del_ok | |
502b9b64 | 1465 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1466 | { |
1467 | begmatch = 0; | |
1468 | endmatch = 0; | |
1469 | osp = nsp = min (osp, nsp); | |
1470 | } | |
1471 | ||
1472 | /* Now go through the line, inserting, writing and | |
1473 | deleting as appropriate. */ | |
1474 | ||
1475 | if (osp > nsp) | |
1476 | { | |
1477 | cursor_to (vpos, nsp); | |
1478 | delete_glyphs (osp - nsp); | |
1479 | } | |
1480 | else if (nsp > osp) | |
1481 | { | |
1482 | /* If going to delete chars later in line | |
1483 | and insert earlier in the line, | |
1484 | must delete first to avoid losing data in the insert */ | |
1485 | if (endmatch && nlen < olen + nsp - osp) | |
1486 | { | |
1487 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1488 | delete_glyphs (olen + nsp - osp - nlen); | |
1489 | olen = nlen - (nsp - osp); | |
1490 | } | |
1491 | cursor_to (vpos, osp); | |
1492 | insert_glyphs ((char *)0, nsp - osp); | |
1493 | } | |
1494 | olen += nsp - osp; | |
1495 | ||
1496 | tem = nsp + begmatch + endmatch; | |
1497 | if (nlen != tem || olen != tem) | |
1498 | { | |
1499 | cursor_to (vpos, nsp + begmatch); | |
1500 | if (!endmatch || nlen == olen) | |
1501 | { | |
1502 | /* If new text being written reaches right margin, | |
1503 | there is no need to do clear-to-eol at the end. | |
1504 | (and it would not be safe, since cursor is not | |
1505 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1506 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1507 | olen = 0; |
1508 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1509 | ||
1510 | #ifdef obsolete | |
1511 | ||
1512 | /* the following code loses disastrously if tem == nlen. | |
1513 | Rather than trying to fix that case, I am trying the simpler | |
1514 | solution found above. */ | |
1515 | ||
1516 | /* If the text reaches to the right margin, | |
1517 | it will lose one way or another (depending on AutoWrap) | |
1518 | to clear to end of line after outputting all the text. | |
1519 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1520 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1521 | { |
1522 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1523 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1524 | clear_end_of_line (olen); | |
1525 | olen = 0; /* Don't let it be cleared again later */ | |
1526 | write_glyphs (nbody + nlen - 1, 1); | |
1527 | } | |
1528 | else | |
1529 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1530 | #endif /* OBSOLETE */ | |
1531 | ||
1532 | } | |
1533 | else if (nlen > olen) | |
1534 | { | |
1535 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1536 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1537 | olen = nlen; | |
1538 | } | |
1539 | else if (olen > nlen) | |
1540 | { | |
1541 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1542 | delete_glyphs (olen - nlen); | |
1543 | olen = nlen; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | just_erase: | |
1548 | /* If any unerased characters remain after the new line, erase them. */ | |
1549 | if (olen > nlen) | |
1550 | { | |
1551 | cursor_to (vpos, nlen); | |
1552 | clear_end_of_line (olen); | |
1553 | } | |
1554 | ||
502b9b64 JB |
1555 | /* Exchange contents between current_frame and new_frame. */ |
1556 | temp = desired_frame->glyphs[vpos]; | |
1557 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1558 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1559 | } |
1560 | \f | |
1561 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1562 | 1, 1, "FOpen termscript file: ", | |
1563 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1564 | FILE = nil means just close any termscript file currently open.") | |
1565 | (file) | |
1566 | Lisp_Object file; | |
1567 | { | |
1568 | if (termscript != 0) fclose (termscript); | |
1569 | termscript = 0; | |
1570 | ||
efb859b4 | 1571 | if (! NILP (file)) |
4588ec20 JB |
1572 | { |
1573 | file = Fexpand_file_name (file, Qnil); | |
1574 | termscript = fopen (XSTRING (file)->data, "w"); | |
1575 | if (termscript == 0) | |
1576 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1577 | } | |
1578 | return Qnil; | |
1579 | } | |
1580 | \f | |
1581 | ||
1582 | #ifdef SIGWINCH | |
efb859b4 | 1583 | SIGTYPE |
4588ec20 JB |
1584 | window_change_signal () |
1585 | { | |
1586 | int width, height; | |
1587 | extern int errno; | |
1588 | int old_errno = errno; | |
1589 | ||
502b9b64 | 1590 | get_frame_size (&width, &height); |
4588ec20 | 1591 | |
502b9b64 JB |
1592 | /* The frame size change obviously applies to a termcap-controlled |
1593 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 1594 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 1595 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
1596 | but don't reallocate the data structures now. Let that be done |
1597 | later outside of the signal handler. */ | |
1598 | ||
1599 | { | |
1600 | Lisp_Object tail; | |
502b9b64 | 1601 | FRAME_PTR f; |
4588ec20 | 1602 | |
502b9b64 | 1603 | FOR_EACH_FRAME (tail, f) |
4588ec20 | 1604 | { |
b6a65ac2 | 1605 | if (FRAME_TERMCAP_P (f)) |
4588ec20 | 1606 | { |
b6a65ac2 | 1607 | change_frame_size (f, height, width, 0, 1); |
4588ec20 JB |
1608 | break; |
1609 | } | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | signal (SIGWINCH, window_change_signal); | |
1614 | errno = old_errno; | |
1615 | } | |
1616 | #endif /* SIGWINCH */ | |
1617 | ||
1618 | ||
502b9b64 | 1619 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
1620 | |
1621 | do_pending_window_change () | |
1622 | { | |
1623 | /* If window_change_signal should have run before, run it now. */ | |
1624 | while (delayed_size_change) | |
1625 | { | |
1626 | Lisp_Object tail; | |
502b9b64 | 1627 | FRAME_PTR f; |
4588ec20 JB |
1628 | |
1629 | delayed_size_change = 0; | |
1630 | ||
502b9b64 | 1631 | FOR_EACH_FRAME (tail, f) |
4588ec20 | 1632 | { |
502b9b64 JB |
1633 | int height = FRAME_NEW_HEIGHT (f); |
1634 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 1635 | |
502b9b64 JB |
1636 | FRAME_NEW_HEIGHT (f) = 0; |
1637 | FRAME_NEW_WIDTH (f) = 0; | |
4588ec20 JB |
1638 | |
1639 | if (height != 0) | |
b6a65ac2 | 1640 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
1641 | } |
1642 | } | |
1643 | } | |
1644 | ||
1645 | ||
502b9b64 | 1646 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 1647 | indicate no change is to take place. |
4588ec20 | 1648 | |
b6a65ac2 JB |
1649 | If DELAY is non-zero, then assume we're being called from a signal |
1650 | handler, and queue the change for later - perhaps the next | |
1651 | redisplay. Since this tries to resize windows, we can't call it | |
1652 | from a signal handler. */ | |
1653 | ||
1654 | change_frame_size (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 1655 | register FRAME_PTR frame; |
b6a65ac2 | 1656 | int newheight, newwidth, pretend; |
4588ec20 JB |
1657 | { |
1658 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 1659 | if (delay) |
4588ec20 | 1660 | { |
b6a65ac2 | 1661 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 1662 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
1663 | delayed_size_change = 1; |
1664 | return; | |
1665 | } | |
1666 | ||
502b9b64 JB |
1667 | /* This size-change overrides any pending one for this frame. */ |
1668 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
1669 | FRAME_NEW_WIDTH (frame) = 0; |
1670 | ||
1671 | /* If an arguments is zero, set it to the current value. */ | |
1672 | newheight || (newheight = FRAME_HEIGHT (frame)); | |
1673 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 1674 | |
b6a65ac2 JB |
1675 | /* Round up to the smallest acceptable size. */ |
1676 | check_frame_size (frame, &newheight, &newwidth); | |
1677 | ||
1678 | /* If we're not changing the frame size, quit now. */ | |
1679 | if (newheight == FRAME_HEIGHT (frame) | |
1680 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
1681 | return; |
1682 | ||
b6a65ac2 | 1683 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 1684 | { |
b6a65ac2 | 1685 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 1686 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 1687 | { |
502b9b64 JB |
1688 | /* Frame has both root and minibuffer. */ |
1689 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
b6a65ac2 | 1690 | newheight - 1, 0); |
502b9b64 | 1691 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
b6a65ac2 | 1692 | = newheight - 1; |
502b9b64 | 1693 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
1694 | } |
1695 | else | |
502b9b64 | 1696 | /* Frame has just one top-level window. */ |
b6a65ac2 JB |
1697 | set_window_height (FRAME_ROOT_WINDOW (frame), newheight, 0); |
1698 | ||
1699 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
1700 | FrameRows = newheight; | |
4588ec20 JB |
1701 | |
1702 | #if 0 | |
502b9b64 | 1703 | if (frame->output_method == output_termcap) |
4588ec20 | 1704 | { |
b6a65ac2 | 1705 | frame_height = newheight; |
4588ec20 | 1706 | if (!pretend) |
b6a65ac2 | 1707 | FrameRows = newheight; |
4588ec20 JB |
1708 | } |
1709 | #endif | |
1710 | } | |
1711 | ||
b6a65ac2 | 1712 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 1713 | { |
502b9b64 | 1714 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 1715 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 1716 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 1717 | |
b6a65ac2 | 1718 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 1719 | FrameCols = newwidth; |
4588ec20 | 1720 | #if 0 |
502b9b64 | 1721 | if (frame->output_method == output_termcap) |
4588ec20 | 1722 | { |
502b9b64 | 1723 | frame_width = newwidth; |
4588ec20 | 1724 | if (!pretend) |
502b9b64 | 1725 | FrameCols = newwidth; |
4588ec20 JB |
1726 | } |
1727 | #endif | |
1728 | } | |
1729 | ||
b6a65ac2 JB |
1730 | FRAME_HEIGHT (frame) = newheight; |
1731 | FRAME_WIDTH (frame) = newwidth; | |
1732 | ||
502b9b64 JB |
1733 | remake_frame_glyphs (frame); |
1734 | calculate_costs (frame); | |
4588ec20 JB |
1735 | } |
1736 | \f | |
1737 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1738 | Ssend_string_to_terminal, 1, 1, 0, | |
1739 | "Send STRING to the terminal without alteration.\n\ | |
1740 | Control characters in STRING will have terminal-dependent effects.") | |
1741 | (str) | |
1742 | Lisp_Object str; | |
1743 | { | |
1744 | CHECK_STRING (str, 0); | |
1745 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1746 | fflush (stdout); | |
1747 | if (termscript) | |
1748 | { | |
1749 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1750 | fflush (termscript); | |
1751 | } | |
1752 | return Qnil; | |
1753 | } | |
1754 | ||
1755 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1756 | "Beep, or flash the screen.\n\ | |
1757 | Also, unless an argument is given,\n\ | |
1758 | terminate any keyboard macro currently executing.") | |
1759 | (arg) | |
1760 | Lisp_Object arg; | |
1761 | { | |
efb859b4 | 1762 | if (!NILP (arg)) |
4588ec20 | 1763 | { |
7fa788da RS |
1764 | if (noninteractive) |
1765 | putchar (07); | |
1766 | else | |
1767 | ring_bell (); | |
4588ec20 JB |
1768 | fflush (stdout); |
1769 | } | |
1770 | else | |
1771 | bitch_at_user (); | |
1772 | ||
1773 | return Qnil; | |
1774 | } | |
1775 | ||
1776 | bitch_at_user () | |
1777 | { | |
1778 | if (noninteractive) | |
1779 | putchar (07); | |
1780 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1781 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1782 | else | |
1783 | ring_bell (); | |
1784 | fflush (stdout); | |
1785 | } | |
1786 | ||
1787 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
1788 | "Pause, without updating display, for ARG seconds.\n\ | |
1789 | Optional second arg non-nil means ARG is measured in milliseconds.\n\ | |
1790 | \(Not all operating systems support milliseconds.)") | |
f76475ad JB |
1791 | (arg, millisec) |
1792 | Lisp_Object arg, millisec; | |
4588ec20 | 1793 | { |
4588ec20 JB |
1794 | int usec = 0; |
1795 | int sec; | |
1796 | ||
f76475ad JB |
1797 | CHECK_NUMBER (arg, 0); |
1798 | sec = XINT (arg); | |
4588ec20 JB |
1799 | if (sec <= 0) |
1800 | return Qnil; | |
1801 | ||
efb859b4 | 1802 | if (!NILP (millisec)) |
4588ec20 | 1803 | { |
a41f8bed | 1804 | #ifndef EMACS_HAS_USECS |
06ef7355 | 1805 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 JB |
1806 | #else |
1807 | usec = sec % 1000 * 1000; | |
1808 | sec /= 1000; | |
1809 | #endif | |
1810 | } | |
1811 | ||
f76475ad JB |
1812 | { |
1813 | Lisp_Object zero; | |
1814 | ||
1815 | XFASTINT (zero) = 0; | |
1816 | wait_reading_process_input (sec, usec, zero, 0); | |
1817 | } | |
d1af74e9 JB |
1818 | |
1819 | #if 0 /* No wait_reading_process_input */ | |
4588ec20 JB |
1820 | immediate_quit = 1; |
1821 | QUIT; | |
1822 | ||
1823 | #ifdef VMS | |
1824 | sys_sleep (sec); | |
1825 | #else /* not VMS */ | |
1826 | /* The reason this is done this way | |
1827 | (rather than defined (H_S) && defined (H_T)) | |
1828 | is because the VMS preprocessor doesn't grok `defined' */ | |
1829 | #ifdef HAVE_SELECT | |
a41f8bed JB |
1830 | EMACS_GET_TIME (end_time); |
1831 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 1832 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 1833 | |
4588ec20 JB |
1834 | while (1) |
1835 | { | |
a41f8bed JB |
1836 | EMACS_GET_TIME (timeout); |
1837 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1838 | if (EMACS_TIME_NEG_P (timeout) | |
1839 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
1840 | break; |
1841 | } | |
4588ec20 JB |
1842 | #else /* not HAVE_SELECT */ |
1843 | sleep (sec); | |
1844 | #endif /* HAVE_SELECT */ | |
1845 | #endif /* not VMS */ | |
1846 | ||
1847 | immediate_quit = 0; | |
1848 | #endif /* no subprocesses */ | |
1849 | ||
1850 | return Qnil; | |
1851 | } | |
1852 | ||
f76475ad JB |
1853 | /* This is just like wait_reading_process_input, except that |
1854 | it does the redisplay. | |
1855 | ||
1856 | It's also just like Fsit_for, except that it can be used for | |
1857 | waiting for input as well. */ | |
4588ec20 | 1858 | |
f76475ad JB |
1859 | Lisp_Object |
1860 | sit_for (sec, usec, reading, display) | |
1861 | int sec, usec, reading, display; | |
1862 | { | |
1863 | Lisp_Object read_kbd; | |
4588ec20 JB |
1864 | |
1865 | if (detect_input_pending ()) | |
1866 | return Qnil; | |
4588ec20 | 1867 | |
f76475ad JB |
1868 | if (display) |
1869 | redisplay_preserve_echo_area (); | |
4588ec20 | 1870 | |
dfdb645c JB |
1871 | if (sec == 0 && usec == 0) |
1872 | return Qt; | |
1873 | ||
4588ec20 JB |
1874 | #ifdef SIGIO |
1875 | gobble_input (); | |
f76475ad JB |
1876 | #endif |
1877 | ||
1878 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
1879 | wait_reading_process_input (sec, usec, read_kbd, display); | |
1880 | ||
d1af74e9 JB |
1881 | |
1882 | #if 0 /* No wait_reading_process_input available. */ | |
4588ec20 JB |
1883 | immediate_quit = 1; |
1884 | QUIT; | |
1885 | ||
1886 | waitchannels = 1; | |
1887 | #ifdef VMS | |
f76475ad | 1888 | input_wait_timeout (XINT (arg)); |
4588ec20 | 1889 | #else /* not VMS */ |
d1af74e9 JB |
1890 | #ifndef HAVE_TIMEVAL |
1891 | timeout_sec = sec; | |
1892 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
1893 | #else /* HAVE_TIMEVAL */ | |
1894 | timeout.tv_sec = sec; | |
1895 | timeout.tv_usec = usec; | |
4588ec20 | 1896 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 1897 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
1898 | #endif /* not VMS */ |
1899 | ||
1900 | immediate_quit = 0; | |
d1af74e9 | 1901 | #endif |
4588ec20 JB |
1902 | |
1903 | return detect_input_pending () ? Qnil : Qt; | |
1904 | } | |
1905 | ||
f76475ad JB |
1906 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
1907 | "Perform redisplay, then wait for ARG seconds or until input is available.\n\ | |
1908 | Optional second arg non-nil means ARG counts in milliseconds.\n\ | |
1909 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ | |
1910 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
1911 | if input is available before it starts.\n\ | |
1912 | Value is t if waited the full time with no input arriving.") | |
1913 | (arg, millisec, nodisp) | |
1914 | Lisp_Object arg, millisec, nodisp; | |
1915 | { | |
1916 | int usec = 0; | |
1113d9db | 1917 | int sec; |
f76475ad JB |
1918 | |
1919 | CHECK_NUMBER (arg, 0); | |
1113d9db | 1920 | sec = XINT (arg); |
f76475ad | 1921 | |
f76475ad JB |
1922 | if (!NILP (millisec)) |
1923 | { | |
1924 | #ifndef EMACS_HAS_USECS | |
06ef7355 | 1925 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); |
f76475ad JB |
1926 | #else |
1927 | usec = (sec % 1000) * 1000; | |
1928 | sec /= 1000; | |
1929 | #endif | |
1930 | } | |
1931 | ||
1932 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
1933 | } | |
1934 | ||
4588ec20 JB |
1935 | DEFUN ("sleep-for-millisecs", Fsleep_for_millisecs, Ssleep_for_millisecs, |
1936 | 1, 1, 0, | |
1937 | "Pause, without updating display, for ARG milliseconds.") | |
f76475ad JB |
1938 | (arg) |
1939 | Lisp_Object arg; | |
4588ec20 | 1940 | { |
f76475ad JB |
1941 | Lisp_Object zero; |
1942 | ||
a41f8bed | 1943 | #ifndef EMACS_HAS_USECS |
4588ec20 JB |
1944 | error ("sleep-for-millisecs not supported on %s", SYSTEM_TYPE); |
1945 | #else | |
f76475ad JB |
1946 | CHECK_NUMBER (arg, 0); |
1947 | ||
1948 | XFASTINT (zero) = 0; | |
1949 | wait_reading_process_input (XINT (arg) / 1000, XINT (arg) % 1000 * 1000, | |
1950 | zero, 0); | |
4588ec20 | 1951 | return Qnil; |
a41f8bed | 1952 | #endif /* EMACS_HAS_USECS */ |
4588ec20 JB |
1953 | } |
1954 | \f | |
1955 | char *terminal_type; | |
1956 | ||
1957 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
1958 | /* Determine terminal type and set terminal_driver */ | |
1959 | /* Then invoke its decoding routine to set up variables | |
1960 | in the terminal package */ | |
1961 | ||
1962 | init_display () | |
1963 | { | |
1964 | #ifdef HAVE_X_WINDOWS | |
1965 | extern int display_arg; | |
1966 | #endif | |
1967 | ||
1968 | meta_key = 0; | |
1969 | inverse_video = 0; | |
1970 | cursor_in_echo_area = 0; | |
1971 | terminal_type = (char *) 0; | |
1972 | ||
1973 | /* If the DISPLAY environment variable is set, try to use X, and | |
1974 | die with an error message if that doesn't work. */ | |
1975 | ||
1976 | /* Check if we're using a window system here before trying to | |
1977 | initialize the terminal. If we check the terminal first, | |
1978 | ||
1979 | If someone has indicated that they want | |
1980 | to use a window system, we shouldn't bother initializing the | |
1981 | terminal. This is especially important when the terminal is so | |
1982 | dumb that emacs gives up before and doesn't bother using the window | |
1983 | system. */ | |
1984 | ||
1985 | #ifdef HAVE_X_WINDOWS | |
efb859b4 | 1986 | if (!inhibit_window_system && (display_arg || getenv ("DISPLAY"))) |
4588ec20 JB |
1987 | { |
1988 | Vwindow_system = intern ("x"); | |
1989 | #ifdef HAVE_X11 | |
1990 | Vwindow_system_version = make_number (11); | |
1991 | #else | |
1992 | Vwindow_system_version = make_number (10); | |
1993 | #endif | |
1994 | return; | |
1995 | } | |
1996 | #endif /* HAVE_X_WINDOWS */ | |
1997 | ||
1998 | /* If no window system has been specified, try to use the terminal. */ | |
1999 | if (! isatty (0)) | |
2000 | { | |
2001 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2002 | exit (1); | |
2003 | } | |
2004 | ||
2005 | /* Look at the TERM variable */ | |
2006 | terminal_type = (char *) getenv ("TERM"); | |
2007 | if (!terminal_type) | |
2008 | { | |
2009 | #ifdef VMS | |
2010 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2011 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2012 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2013 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2014 | #else | |
2015 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2016 | #endif | |
2017 | exit (1); | |
2018 | } | |
2019 | ||
2020 | #ifdef VMS | |
2021 | /* VMS DCL tends to upcase things, so downcase term type. | |
2022 | Hardly any uppercase letters in terminal types; should be none. */ | |
2023 | { | |
2024 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2025 | char *p; | |
2026 | ||
2027 | strcpy (new, terminal_type); | |
2028 | ||
2029 | for (p = new; *p; p++) | |
2030 | if (isupper (*p)) | |
2031 | *p = tolower (*p); | |
2032 | ||
2033 | terminal_type = new; | |
2034 | } | |
2035 | #endif | |
2036 | ||
2037 | term_init (terminal_type); | |
2038 | ||
502b9b64 JB |
2039 | remake_frame_glyphs (selected_frame); |
2040 | calculate_costs (selected_frame); | |
4588ec20 JB |
2041 | |
2042 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2043 | FRAME_CURSOR_X (selected_frame) = 0; |
2044 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2045 | |
2046 | #ifdef SIGWINCH | |
2047 | #ifndef CANNOT_DUMP | |
2048 | if (initialized) | |
2049 | #endif /* CANNOT_DUMP */ | |
2050 | signal (SIGWINCH, window_change_signal); | |
2051 | #endif /* SIGWINCH */ | |
2052 | } | |
2053 | \f | |
2054 | syms_of_display () | |
2055 | { | |
502b9b64 JB |
2056 | #ifdef MULTI_FRAME |
2057 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2058 | #endif |
2059 | defsubr (&Sredraw_display); | |
2060 | defsubr (&Sopen_termscript); | |
2061 | defsubr (&Sding); | |
2062 | defsubr (&Ssit_for); | |
2063 | defsubr (&Ssleep_for); | |
2064 | defsubr (&Ssend_string_to_terminal); | |
2065 | ||
2066 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2067 | "The output baud rate of the terminal.\n\ | |
2068 | On most systems, changing this value will affect the amount of padding\n\ | |
2069 | and the other strategic decisions made during redisplay."); | |
2070 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2071 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2072 | This means everything is in inverse video which otherwise would not be."); |
2073 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2074 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2075 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2076 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2077 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2078 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2079 | It is up to you to set this variable if your terminal can do that."); |
2080 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2081 | "A symbol naming the window-system under which Emacs is running\n\ | |
2082 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2083 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2084 | "The version number of the window system in use.\n\ | |
2085 | For X windows, this is 10 or 11."); | |
2086 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2087 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2088 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2089 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2090 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2091 | Each element can be:\n\ | |
2092 | integer: a glyph code which this glyph is an alias for.\n\ | |
2093 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2094 | nil: this glyph mod 256 is char code to output,\n\ | |
2095 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2096 | Vglyph_table = Qnil; | |
2097 | ||
2098 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2099 | "Display table to use for buffers that specify none.\n\ | |
2100 | See `buffer-display-table' for more information."); | |
2101 | Vstandard_display_table = Qnil; | |
2102 | ||
2103 | /* Initialize `window-system', unless init_display already decided it. */ | |
2104 | #ifdef CANNOT_DUMP | |
2105 | if (noninteractive) | |
2106 | #endif | |
2107 | { | |
2108 | Vwindow_system = Qnil; | |
2109 | Vwindow_system_version = Qnil; | |
2110 | } | |
2111 | } | |
2112 |