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