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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 | |
99 | so put cursor on minibuffer after the prompt. */ | |
100 | ||
101 | int cursor_in_echo_area; | |
102 | \f | |
103 | /* The currently selected screen. | |
104 | In a single-screen version, this variable always remains 0. */ | |
105 | ||
106 | SCREEN_PTR selected_screen; | |
107 | ||
108 | /* In a single-screen version, the information that would otherwise | |
109 | exist inside a `struct screen' lives in the following variables instead. */ | |
110 | ||
111 | #ifndef MULTI_SCREEN | |
112 | ||
113 | /* Desired terminal cursor position (to show position of point), | |
114 | origin zero */ | |
115 | ||
116 | int cursX, cursY; | |
117 | ||
118 | /* Description of current screen contents */ | |
119 | ||
120 | struct screen_glyphs *current_glyphs; | |
121 | ||
122 | /* Description of desired screen contents */ | |
123 | ||
124 | struct screen_glyphs *desired_glyphs; | |
125 | ||
126 | #endif /* not MULTI_SCREEN */ | |
127 | ||
128 | /* This is a vector, made larger whenever it isn't large enough, | |
129 | which is used inside `update_screen' to hold the old contents | |
130 | of the SCREEN_PHYS_LINES of the screen being updated. */ | |
131 | struct screen_glyphs **ophys_lines; | |
132 | /* Length of vector currently allocated. */ | |
133 | int ophys_lines_length; | |
134 | ||
135 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
136 | ||
137 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
138 | ||
139 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
140 | ||
141 | int in_display; /* 1 if in redisplay: can't handle SIGWINCH now. */ | |
142 | ||
143 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ | |
144 | int delayed_screen_height; /* Remembered new screen height. */ | |
145 | int delayed_screen_width; /* Remembered new screen width. */ | |
146 | \f | |
147 | #ifdef MULTI_SCREEN | |
148 | ||
149 | DEFUN ("redraw-screen", Fredraw_screen, Sredraw_screen, 1, 1, 0, | |
150 | "Clear screen SCREEN and output again what is supposed to appear on it.") | |
151 | (screen) | |
152 | Lisp_Object screen; | |
153 | { | |
154 | SCREEN_PTR s; | |
155 | ||
efb859b4 | 156 | CHECK_LIVE_SCREEN (screen, 0); |
4588ec20 JB |
157 | s = XSCREEN (screen); |
158 | update_begin (s); | |
159 | /* set_terminal_modes (); */ | |
160 | clear_screen (); | |
161 | update_end (s); | |
162 | fflush (stdout); | |
163 | clear_screen_records (s); | |
164 | windows_or_buffers_changed++; | |
165 | /* Mark all windows as INaccurate, | |
166 | so that every window will have its redisplay done. */ | |
167 | mark_window_display_accurate (SCREEN_ROOT_WINDOW (s), 0); | |
168 | s->garbaged = 0; | |
169 | return Qnil; | |
170 | } | |
171 | ||
172 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
173 | "Redraw all screens marked as having their images garbled.") | |
174 | () | |
175 | { | |
176 | Lisp_Object screen, tail; | |
177 | ||
178 | for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
179 | { | |
180 | screen = XCONS (tail)->car; | |
181 | if (XSCREEN (screen)->garbaged && XSCREEN (screen)->visible) | |
182 | Fredraw_screen (screen); | |
183 | } | |
184 | return Qnil; | |
185 | } | |
186 | ||
187 | redraw_screen (s) | |
188 | SCREEN_PTR s; | |
189 | { | |
190 | Lisp_Object screen; | |
191 | XSET (screen, Lisp_Screen, s); | |
192 | Fredraw_screen (screen); | |
193 | } | |
194 | ||
195 | #else /* not MULTI_SCREEN */ | |
196 | ||
197 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, 0, | |
198 | "Clear screen and output again what is supposed to appear on it.") | |
199 | () | |
200 | { | |
201 | update_begin (0); | |
202 | set_terminal_modes (); | |
203 | clear_screen (); | |
204 | update_end (0); | |
205 | fflush (stdout); | |
206 | clear_screen_records (0); | |
207 | windows_or_buffers_changed++; | |
208 | /* Mark all windows as INaccurate, | |
209 | so that every window will have its redisplay done. */ | |
210 | mark_window_display_accurate (XWINDOW (minibuf_window)->prev, 0); | |
211 | return Qnil; | |
212 | } | |
213 | ||
214 | #endif /* not MULTI_SCREEN */ | |
215 | \f | |
216 | static struct screen_glyphs * | |
217 | make_screen_glyphs (screen, empty) | |
218 | register SCREEN_PTR screen; | |
219 | int empty; | |
220 | { | |
221 | register int i; | |
222 | register width = SCREEN_WIDTH (screen); | |
223 | register height = SCREEN_HEIGHT (screen); | |
224 | register struct screen_glyphs *new = | |
225 | (struct screen_glyphs *) xmalloc (sizeof (struct screen_glyphs)); | |
226 | ||
227 | SET_GLYPHS_SCREEN (new, screen); | |
228 | new->height = height; | |
229 | new->width = width; | |
230 | new->used = (int *) xmalloc (height * sizeof (int)); | |
231 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
232 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
233 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
234 | bzero (new->enable, height * sizeof (char)); | |
235 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
236 | ||
237 | #ifdef HAVE_X_WINDOWS | |
238 | if (SCREEN_IS_X (screen)) | |
239 | { | |
240 | new->nruns = (int *) xmalloc (height * sizeof (int)); | |
241 | new->face_list | |
242 | = (struct run **) xmalloc (height * sizeof (struct run *)); | |
243 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); | |
244 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
245 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
246 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
247 | } | |
248 | #endif | |
249 | ||
250 | if (empty) | |
251 | { | |
252 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
253 | used as temporary storage when updating the screen. See scroll.c. */ | |
254 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); | |
255 | ||
256 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
257 | bzero (new->total_contents, total_glyphs); | |
258 | } | |
259 | else | |
260 | { | |
261 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
262 | ||
263 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
264 | bzero (new->total_contents, total_glyphs); | |
265 | for (i = 0; i < height; i++) | |
266 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
267 | } | |
268 | ||
269 | return new; | |
270 | } | |
271 | ||
272 | static void | |
273 | free_screen_glyphs (screen, glyphs) | |
274 | SCREEN_PTR screen; | |
275 | struct screen_glyphs *glyphs; | |
276 | { | |
277 | if (glyphs->total_contents) | |
278 | free (glyphs->total_contents); | |
279 | ||
280 | free (glyphs->used); | |
281 | free (glyphs->glyphs); | |
282 | free (glyphs->highlight); | |
283 | free (glyphs->enable); | |
284 | free (glyphs->bufp); | |
285 | ||
286 | #ifdef HAVE_X_WINDOWS | |
287 | if (SCREEN_IS_X (screen)) | |
288 | { | |
289 | free (glyphs->nruns); | |
290 | free (glyphs->face_list); | |
291 | free (glyphs->top_left_x); | |
292 | free (glyphs->top_left_y); | |
293 | free (glyphs->pix_width); | |
294 | free (glyphs->pix_height); | |
295 | } | |
296 | #endif | |
297 | ||
298 | free (glyphs); | |
299 | } | |
300 | ||
301 | static void | |
302 | remake_screen_glyphs (screen) | |
303 | SCREEN_PTR screen; | |
304 | { | |
305 | if (SCREEN_CURRENT_GLYPHS (screen)) | |
306 | free_screen_glyphs (screen, SCREEN_CURRENT_GLYPHS (screen)); | |
307 | if (SCREEN_DESIRED_GLYPHS (screen)) | |
308 | free_screen_glyphs (screen, SCREEN_DESIRED_GLYPHS (screen)); | |
309 | if (SCREEN_TEMP_GLYPHS (screen)) | |
310 | free_screen_glyphs (screen, SCREEN_TEMP_GLYPHS (screen)); | |
311 | ||
312 | if (SCREEN_MESSAGE_BUF (screen)) | |
313 | SCREEN_MESSAGE_BUF (screen) | |
314 | = (char *) xrealloc (SCREEN_MESSAGE_BUF (screen), | |
315 | SCREEN_WIDTH (screen) + 1); | |
316 | else | |
317 | SCREEN_MESSAGE_BUF (screen) | |
318 | = (char *) xmalloc (SCREEN_WIDTH (screen) + 1); | |
319 | ||
320 | SCREEN_CURRENT_GLYPHS (screen) = make_screen_glyphs (screen, 0); | |
321 | SCREEN_DESIRED_GLYPHS (screen) = make_screen_glyphs (screen, 0); | |
322 | SCREEN_TEMP_GLYPHS (screen) = make_screen_glyphs (screen, 1); | |
323 | SET_SCREEN_GARBAGED (screen); | |
324 | } | |
325 | \f | |
326 | /* Return the hash code of contents of line VPOS in screen-matrix M. */ | |
327 | ||
328 | static int | |
329 | line_hash_code (m, vpos) | |
330 | register struct screen_glyphs *m; | |
331 | int vpos; | |
332 | { | |
333 | register GLYPH *body, *end; | |
334 | register int h = 0; | |
335 | ||
336 | if (!m->enable[vpos]) | |
337 | return 0; | |
338 | ||
339 | /* Give all lighlighted lines the same hash code | |
340 | so as to encourage scrolling to leave them in place. */ | |
341 | if (m->highlight[vpos]) | |
342 | return -1; | |
343 | ||
344 | body = m->glyphs[vpos]; | |
345 | ||
346 | if (must_write_spaces) | |
347 | while (1) | |
348 | { | |
349 | GLYPH g = *body++; | |
350 | ||
351 | if (g == 0) | |
352 | break; | |
353 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
354 | } | |
355 | else | |
356 | while (1) | |
357 | { | |
358 | GLYPH g = *body++; | |
359 | ||
360 | if (g == 0) | |
361 | break; | |
362 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
363 | } | |
364 | ||
365 | if (h) | |
366 | return h; | |
367 | return 1; | |
368 | } | |
369 | ||
370 | /* Return number of characters in line in M at vpos VPOS, | |
371 | except don't count leading and trailing spaces | |
372 | unless the terminal requires those to be explicitly output. */ | |
373 | ||
374 | static unsigned int | |
375 | line_draw_cost (m, vpos) | |
376 | struct screen_glyphs *m; | |
377 | int vpos; | |
378 | { | |
379 | register GLYPH *beg = m->glyphs[vpos]; | |
380 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
381 | register int i; | |
382 | register int tlen = GLYPH_TABLE_LENGTH; | |
383 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
384 | ||
385 | /* Ignore trailing and leading spaces if we can. */ | |
386 | if (!must_write_spaces) | |
387 | { | |
388 | while ((end != beg) && (*end == SPACEGLYPH)) | |
389 | --end; | |
390 | if (end == beg) | |
391 | return (0); /* All blank line. */ | |
392 | ||
393 | while (*beg == SPACEGLYPH) | |
394 | ++beg; | |
395 | } | |
396 | ||
397 | /* If we don't have a glyph-table, each glyph is one character, | |
398 | so return the number of glyphs. */ | |
399 | if (tbase == 0) | |
400 | return end - beg; | |
401 | ||
402 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
403 | i = 0; | |
404 | while ((beg <= end) && *beg) | |
405 | { | |
406 | register GLYPH g = *beg++; | |
407 | ||
408 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
409 | i += 1; | |
410 | else | |
411 | i += GLYPH_LENGTH (tbase, g); | |
412 | } | |
413 | return i; | |
414 | } | |
415 | \f | |
416 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
417 | ||
418 | The only other interface into redisplay is through setting | |
419 | SCREEN_CURSOR_X (screen) and SCREEN_CURSOR_Y (screen) | |
420 | and SET_SCREEN_GARBAGED (screen). */ | |
421 | ||
422 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
423 | ||
424 | cancel_line (vpos, screen) | |
425 | int vpos; | |
426 | register SCREEN_PTR screen; | |
427 | { | |
428 | SCREEN_DESIRED_GLYPHS (screen)->enable[vpos] = 0; | |
429 | } | |
430 | ||
431 | clear_screen_records (screen) | |
432 | register SCREEN_PTR screen; | |
433 | { | |
434 | bzero (SCREEN_CURRENT_GLYPHS (screen)->enable, SCREEN_HEIGHT (screen)); | |
435 | } | |
436 | ||
437 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
438 | ||
439 | void | |
440 | get_display_line (screen, vpos, hpos) | |
441 | register SCREEN_PTR screen; | |
442 | int vpos; | |
443 | register int hpos; | |
444 | { | |
445 | register struct screen_glyphs *glyphs; | |
446 | register struct screen_glyphs *desired_glyphs = SCREEN_DESIRED_GLYPHS (screen); | |
447 | register GLYPH *p; | |
448 | ||
449 | if (vpos < 0 || (! SCREEN_VISIBLE_P (screen))) | |
450 | abort (); | |
451 | ||
452 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
453 | abort (); | |
454 | ||
455 | if (! desired_glyphs->enable[vpos]) | |
456 | { | |
457 | desired_glyphs->used[vpos] = 0; | |
458 | desired_glyphs->highlight[vpos] = 0; | |
459 | desired_glyphs->enable[vpos] = 1; | |
460 | } | |
461 | ||
462 | if (hpos > desired_glyphs->used[vpos]) | |
463 | { | |
464 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
465 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
466 | ||
467 | desired_glyphs->used[vpos] = hpos; | |
468 | while (g != end) | |
469 | *g++ = SPACEGLYPH; | |
470 | } | |
471 | } | |
472 | ||
473 | /* Like bcopy except never gets confused by overlap. */ | |
474 | ||
475 | void | |
476 | safe_bcopy (from, to, size) | |
477 | char *from, *to; | |
478 | int size; | |
479 | { | |
480 | register char *endf; | |
481 | register char *endt; | |
482 | ||
483 | if (size == 0) | |
484 | return; | |
485 | ||
486 | /* If destination is higher in memory, and overlaps source zone, | |
487 | copy from the end. */ | |
488 | if (from < to && from + size > to) | |
489 | { | |
490 | endf = from + size; | |
491 | endt = to + size; | |
492 | ||
493 | /* If TO - FROM is large, then we should break the copy into | |
494 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
495 | TO - FROM is small, then the bcopy function call overhead | |
496 | makes this not worth it. The crossover point could be about | |
497 | anywhere. Since I don't think the obvious copy loop is ever | |
498 | too bad, I'm trying to err in its favor. */ | |
499 | if (to - from < 64) | |
500 | { | |
501 | do | |
502 | *--endt = *--endf; | |
503 | while (endf != from); | |
504 | } | |
505 | else | |
506 | { | |
98038dc0 JB |
507 | /* Since TO - FROM >= 64, the overlap is less than SIZE, |
508 | so we can always safely do this loop once. */ | |
4588ec20 JB |
509 | while (endt > to) |
510 | { | |
511 | endt -= (to - from); | |
512 | endf -= (to - from); | |
513 | ||
514 | bcopy (endf, endt, to - from); | |
515 | } | |
516 | ||
517 | /* If TO - FROM wasn't a multiple of SIZE, there will be a | |
518 | little left over. The amount left over is | |
519 | (endt + (to - from)) - to, which is endt - from. */ | |
520 | bcopy (from, to, endt - from); | |
521 | } | |
522 | } | |
523 | else | |
524 | bcopy (from, to, size); | |
525 | } | |
526 | ||
527 | #if 0 | |
528 | void | |
529 | safe_bcopy (from, to, size) | |
530 | char *from, *to; | |
531 | int size; | |
532 | { | |
533 | register char *endf; | |
534 | register char *endt; | |
535 | ||
536 | if (size == 0) | |
537 | return; | |
538 | ||
539 | /* If destination is higher in memory, and overlaps source zone, | |
540 | copy from the end. */ | |
541 | if (from < to && from + size > to) | |
542 | { | |
543 | endf = from + size; | |
544 | endt = to + size; | |
545 | ||
546 | do | |
547 | *--endt = *--endf; | |
548 | while (endf != from); | |
549 | ||
550 | return; | |
551 | } | |
552 | ||
553 | bcopy (from, to, size); | |
554 | } | |
555 | #endif | |
556 | ||
98038dc0 | 557 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
558 | DISTANCE may be negative. */ |
559 | ||
560 | static void | |
561 | rotate_vector (vector, size, distance) | |
562 | char *vector; | |
563 | int size; | |
564 | int distance; | |
565 | { | |
566 | char *temp = (char *) alloca (size); | |
567 | ||
568 | if (distance < 0) | |
569 | distance += size; | |
570 | ||
571 | bcopy (vector, temp + distance, size - distance); | |
572 | bcopy (vector + size - distance, temp, distance); | |
573 | bcopy (temp, vector, size); | |
574 | } | |
575 | ||
576 | /* Scroll lines from vpos FROM up to but not including vpos END | |
577 | down by AMOUNT lines (AMOUNT may be negative). | |
578 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
579 | ||
580 | int | |
581 | scroll_screen_lines (screen, from, end, amount) | |
582 | register SCREEN_PTR screen; | |
583 | int from, end, amount; | |
584 | { | |
585 | register int i; | |
586 | register struct screen_glyphs *current_screen | |
587 | = SCREEN_CURRENT_GLYPHS (screen); | |
588 | ||
589 | if (!line_ins_del_ok) | |
590 | return 0; | |
591 | ||
592 | if (amount == 0) | |
593 | return 1; | |
594 | ||
595 | if (amount > 0) | |
596 | { | |
597 | update_begin (screen); | |
598 | set_terminal_window (end + amount); | |
599 | if (!scroll_region_ok) | |
600 | ins_del_lines (end, -amount); | |
601 | ins_del_lines (from, amount); | |
602 | set_terminal_window (0); | |
603 | ||
604 | rotate_vector (current_screen->glyphs + from, | |
605 | sizeof (GLYPH *) * (end + amount - from), | |
606 | amount * sizeof (GLYPH *)); | |
607 | ||
608 | safe_bcopy (current_screen->used + from, | |
609 | current_screen->used + from + amount, | |
610 | (end - from) * sizeof current_screen->used[0]); | |
611 | ||
612 | safe_bcopy (current_screen->highlight + from, | |
613 | current_screen->highlight + from + amount, | |
614 | (end - from) * sizeof current_screen->highlight[0]); | |
615 | ||
616 | safe_bcopy (current_screen->enable + from, | |
617 | current_screen->enable + from + amount, | |
618 | (end - from) * sizeof current_screen->enable[0]); | |
619 | ||
620 | /* Mark the lines made empty by scrolling as enabled, empty and | |
621 | normal video. */ | |
622 | bzero (current_screen->used + from, | |
623 | amount * sizeof current_screen->used[0]); | |
624 | bzero (current_screen->highlight + from, | |
625 | amount * sizeof current_screen->highlight[0]); | |
626 | for (i = from; i < from + amount; i++) | |
627 | { | |
628 | current_screen->glyphs[i][0] = '\0'; | |
629 | current_screen->enable[i] = 1; | |
630 | } | |
631 | ||
632 | safe_bcopy (current_screen->bufp + from, | |
633 | current_screen->bufp + from + amount, | |
634 | (end - from) * sizeof current_screen->bufp[0]); | |
635 | ||
636 | #ifdef HAVE_X_WINDOWS | |
637 | if (SCREEN_IS_X (screen)) | |
638 | { | |
639 | safe_bcopy (current_screen->nruns + from, | |
640 | current_screen->nruns + from + amount, | |
641 | (end - from) * sizeof current_screen->nruns[0]); | |
642 | ||
643 | safe_bcopy (current_screen->face_list + from, | |
644 | current_screen->face_list + from + amount, | |
645 | (end - from) * sizeof current_screen->face_list[0]); | |
646 | ||
647 | safe_bcopy (current_screen->top_left_x + from, | |
648 | current_screen->top_left_x + from + amount, | |
649 | (end - from) * sizeof current_screen->top_left_x[0]); | |
650 | ||
651 | safe_bcopy (current_screen->top_left_y + from, | |
652 | current_screen->top_left_y + from + amount, | |
653 | (end - from) * sizeof current_screen->top_left_y[0]); | |
654 | ||
655 | safe_bcopy (current_screen->pix_width + from, | |
656 | current_screen->pix_width + from + amount, | |
657 | (end - from) * sizeof current_screen->pix_width[0]); | |
658 | ||
659 | safe_bcopy (current_screen->pix_height + from, | |
660 | current_screen->pix_height + from + amount, | |
661 | (end - from) * sizeof current_screen->pix_height[0]); | |
662 | } | |
663 | #endif /* HAVE_X_WINDOWS */ | |
664 | ||
665 | update_end (screen); | |
666 | } | |
667 | if (amount < 0) | |
668 | { | |
669 | update_begin (screen); | |
670 | set_terminal_window (end); | |
671 | ins_del_lines (from + amount, amount); | |
672 | if (!scroll_region_ok) | |
673 | ins_del_lines (end + amount, -amount); | |
674 | set_terminal_window (0); | |
675 | ||
676 | rotate_vector (current_screen->glyphs + from + amount, | |
677 | sizeof (GLYPH *) * (end - from - amount), | |
678 | amount * sizeof (GLYPH *)); | |
679 | ||
680 | safe_bcopy (current_screen->used + from, | |
681 | current_screen->used + from + amount, | |
682 | (end - from) * sizeof current_screen->used[0]); | |
683 | ||
684 | safe_bcopy (current_screen->highlight + from, | |
685 | current_screen->highlight + from + amount, | |
686 | (end - from) * sizeof current_screen->highlight[0]); | |
687 | ||
688 | safe_bcopy (current_screen->enable + from, | |
689 | current_screen->enable + from + amount, | |
690 | (end - from) * sizeof current_screen->enable[0]); | |
691 | ||
692 | /* Mark the lines made empty by scrolling as enabled, empty and | |
693 | normal video. */ | |
694 | bzero (current_screen->used + end + amount, | |
695 | - amount * sizeof current_screen->used[0]); | |
696 | bzero (current_screen->highlight + end + amount, | |
697 | - amount * sizeof current_screen->highlight[0]); | |
698 | for (i = end + amount; i < end; i++) | |
699 | { | |
700 | current_screen->glyphs[i][0] = '\0'; | |
701 | current_screen->enable[i] = 1; | |
702 | } | |
703 | ||
704 | safe_bcopy (current_screen->bufp + from, | |
705 | current_screen->bufp + from + amount, | |
706 | (end - from) * sizeof current_screen->bufp[0]); | |
707 | ||
708 | #ifdef HAVE_X_WINDOWS | |
709 | if (SCREEN_IS_X (screen)) | |
710 | { | |
711 | safe_bcopy (current_screen->nruns + from, | |
712 | current_screen->nruns + from + amount, | |
713 | (end - from) * sizeof current_screen->nruns[0]); | |
714 | ||
715 | safe_bcopy (current_screen->face_list + from, | |
716 | current_screen->face_list + from + amount, | |
717 | (end - from) * sizeof current_screen->face_list[0]); | |
718 | ||
719 | safe_bcopy (current_screen->top_left_x + from, | |
720 | current_screen->top_left_x + from + amount, | |
721 | (end - from) * sizeof current_screen->top_left_x[0]); | |
722 | ||
723 | safe_bcopy (current_screen->top_left_y + from, | |
724 | current_screen->top_left_y + from + amount, | |
725 | (end - from) * sizeof current_screen->top_left_y[0]); | |
726 | ||
727 | safe_bcopy (current_screen->pix_width + from, | |
728 | current_screen->pix_width + from + amount, | |
729 | (end - from) * sizeof current_screen->pix_width[0]); | |
730 | ||
731 | safe_bcopy (current_screen->pix_height + from, | |
732 | current_screen->pix_height + from + amount, | |
733 | (end - from) * sizeof current_screen->pix_height[0]); | |
734 | } | |
735 | #endif /* HAVE_X_WINDOWS */ | |
736 | ||
737 | update_end (screen); | |
738 | } | |
739 | return 1; | |
740 | } | |
741 | \f | |
742 | /* After updating a window W that isn't the full screen wide, | |
743 | copy all the columns that W does not occupy | |
744 | into the SCREEN_DESIRED_GLYPHS (screen) from the SCREEN_PHYS_GLYPHS (screen) | |
745 | so that update_screen will not change those columns. */ | |
746 | ||
747 | preserve_other_columns (w) | |
748 | struct window *w; | |
749 | { | |
750 | register int vpos; | |
751 | register struct screen_glyphs *current_screen, *desired_screen; | |
752 | register SCREEN_PTR screen = XSCREEN (w->screen); | |
753 | int start = XFASTINT (w->left); | |
754 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
755 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
756 | ||
757 | current_screen = SCREEN_CURRENT_GLYPHS (screen); | |
758 | desired_screen = SCREEN_DESIRED_GLYPHS (screen); | |
759 | ||
760 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
761 | { | |
762 | if (current_screen->enable[vpos] && desired_screen->enable[vpos]) | |
763 | { | |
764 | if (start > 0) | |
765 | { | |
766 | int len; | |
767 | ||
768 | bcopy (current_screen->glyphs[vpos], | |
769 | desired_screen->glyphs[vpos], start); | |
770 | len = min (start, current_screen->used[vpos]); | |
771 | if (desired_screen->used[vpos] < len) | |
772 | desired_screen->used[vpos] = len; | |
773 | } | |
774 | if (current_screen->used[vpos] > end | |
775 | && desired_screen->used[vpos] < current_screen->used[vpos]) | |
776 | { | |
777 | while (desired_screen->used[vpos] < end) | |
778 | desired_screen->glyphs[vpos][desired_screen->used[vpos]++] | |
779 | = SPACEGLYPH; | |
780 | bcopy (current_screen->glyphs[vpos] + end, | |
781 | desired_screen->glyphs[vpos] + end, | |
782 | current_screen->used[vpos] - end); | |
783 | desired_screen->used[vpos] = current_screen->used[vpos]; | |
784 | } | |
785 | } | |
786 | } | |
787 | } | |
788 | \f | |
789 | #if 0 | |
790 | ||
791 | /* If window w does not need to be updated and isn't the full screen wide, | |
792 | copy all the columns that w does occupy | |
793 | into the SCREEN_DESIRED_LINES (screen) from the SCREEN_PHYS_LINES (screen) | |
794 | so that update_screen will not change those columns. | |
795 | ||
796 | Have not been able to figure out how to use this correctly. */ | |
797 | ||
798 | preserve_my_columns (w) | |
799 | struct window *w; | |
800 | { | |
801 | register int vpos, fin; | |
802 | register struct screen_glyphs *l1, *l2; | |
803 | register SCREEN_PTR screen = XSCREEN (w->screen); | |
804 | int start = XFASTINT (w->left); | |
805 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
806 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
807 | ||
808 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
809 | { | |
810 | if ((l1 = SCREEN_DESIRED_GLYPHS (screen)->glyphs[vpos + 1]) | |
811 | && (l2 = SCREEN_PHYS_GLYPHS (screen)->glyphs[vpos + 1])) | |
812 | { | |
813 | if (l2->length > start && l1->length < l2->length) | |
814 | { | |
815 | fin = l2->length; | |
816 | if (fin > end) fin = end; | |
817 | while (l1->length < start) | |
818 | l1->body[l1->length++] = ' '; | |
819 | bcopy (l2->body + start, l1->body + start, fin - start); | |
820 | l1->length = fin; | |
821 | } | |
822 | } | |
823 | } | |
824 | } | |
825 | ||
826 | #endif | |
827 | \f | |
828 | /* On discovering that the redisplay for a window was no good, | |
829 | cancel the columns of that window, so that when the window is | |
830 | displayed over again get_display_line will not complain. */ | |
831 | ||
832 | cancel_my_columns (w) | |
833 | struct window *w; | |
834 | { | |
835 | register int vpos; | |
836 | register SCREEN_PTR screen = XSCREEN (w->screen); | |
837 | register struct screen_glyphs *desired_glyphs = screen->desired_glyphs; | |
838 | register int start = XFASTINT (w->left); | |
839 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
840 | ||
841 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
842 | if (desired_glyphs->enable[vpos] | |
843 | && desired_glyphs->used[vpos] >= start) | |
844 | desired_glyphs->used[vpos] = start; | |
845 | } | |
846 | \f | |
847 | /* These functions try to perform directly and immediately on the screen | |
848 | the necessary output for one change in the buffer. | |
849 | They may return 0 meaning nothing was done if anything is difficult, | |
850 | or 1 meaning the output was performed properly. | |
851 | They assume that the screen was up to date before the buffer | |
852 | change being displayed. THey make various other assumptions too; | |
853 | see command_loop_1 where these are called. */ | |
854 | ||
855 | int | |
856 | direct_output_for_insert (g) | |
857 | int g; | |
858 | { | |
859 | register SCREEN_PTR screen = selected_screen; | |
860 | register struct screen_glyphs *current_screen | |
861 | = SCREEN_CURRENT_GLYPHS (screen); | |
862 | ||
863 | #ifndef COMPILER_REGISTER_BUG | |
864 | register | |
865 | #endif /* COMPILER_REGISTER_BUG */ | |
866 | struct window *w = XWINDOW (selected_window); | |
867 | #ifndef COMPILER_REGISTER_BUG | |
868 | register | |
869 | #endif /* COMPILER_REGISTER_BUG */ | |
870 | int hpos = SCREEN_CURSOR_X (screen); | |
871 | #ifndef COMPILER_REGISTER_BUG | |
872 | register | |
873 | #endif /* COMPILER_REGISTER_BUG */ | |
874 | int vpos = SCREEN_CURSOR_Y (screen); | |
875 | ||
876 | /* Give up if about to continue line */ | |
877 | if (hpos - XFASTINT (w->left) + 1 + 1 >= XFASTINT (w->width) | |
878 | ||
879 | /* Avoid losing if cursor is in invisible text off left margin */ | |
880 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
881 | ||
882 | /* Give up if cursor outside window (in minibuf, probably) */ | |
883 | || SCREEN_CURSOR_Y (screen) < XFASTINT (w->top) | |
884 | || SCREEN_CURSOR_Y (screen) >= XFASTINT (w->top) + XFASTINT (w->height) | |
885 | ||
886 | /* Give up if cursor not really at SCREEN_CURSOR_X, SCREEN_CURSOR_Y */ | |
887 | || !display_completed | |
888 | ||
889 | /* Give up if buffer appears in two places. */ | |
890 | || buffer_shared > 1 | |
891 | ||
892 | /* Give up if w is minibuffer and a message is being displayed there */ | |
893 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
894 | return 0; | |
895 | ||
896 | current_screen->glyphs[vpos][hpos] = g; | |
897 | unchanged_modified = MODIFF; | |
898 | beg_unchanged = GPT - BEG; | |
899 | XFASTINT (w->last_point) = point; | |
900 | XFASTINT (w->last_point_x) = hpos; | |
901 | XFASTINT (w->last_modified) = MODIFF; | |
902 | ||
903 | reassert_line_highlight (0, vpos); | |
904 | write_glyphs (¤t_screen->glyphs[vpos][hpos], 1); | |
905 | fflush (stdout); | |
906 | ++SCREEN_CURSOR_X (screen); | |
907 | if (hpos == current_screen->used[vpos]) | |
908 | { | |
909 | current_screen->used[vpos] = hpos + 1; | |
910 | current_screen->glyphs[vpos][hpos + 1] = 0; | |
911 | } | |
912 | ||
913 | return 1; | |
914 | } | |
915 | ||
916 | int | |
917 | direct_output_forward_char (n) | |
918 | int n; | |
919 | { | |
920 | register SCREEN_PTR screen = selected_screen; | |
921 | register struct window *w = XWINDOW (selected_window); | |
922 | ||
a9764248 JB |
923 | /* Avoid losing if cursor is in invisible text off left margin |
924 | or about to go off either side of window. */ | |
925 | if ((SCREEN_CURSOR_X (screen) == XFASTINT (w->left) | |
926 | && (XINT (w->hscroll) || n < 0)) | |
927 | || (n > 0 | |
928 | && (SCREEN_CURSOR_X (screen) + 1 | |
929 | >= (XFASTINT (w->left) + XFASTINT (w->width) | |
930 | - (XFASTINT (w->width) < SCREEN_WIDTH (screen)) | |
931 | - 1)))) | |
4588ec20 JB |
932 | return 0; |
933 | ||
934 | SCREEN_CURSOR_X (screen) += n; | |
935 | XFASTINT (w->last_point_x) = SCREEN_CURSOR_X (screen); | |
936 | XFASTINT (w->last_point) = point; | |
937 | cursor_to (SCREEN_CURSOR_Y (screen), SCREEN_CURSOR_X (screen)); | |
938 | fflush (stdout); | |
939 | return 1; | |
940 | } | |
941 | \f | |
942 | static void update_line (); | |
943 | ||
944 | /* Update screen S based on the data in SCREEN_DESIRED_GLYPHS. | |
945 | Value is nonzero if redisplay stopped due to pending input. | |
946 | FORCE nonzero means do not stop for pending input. */ | |
947 | ||
948 | int | |
949 | update_screen (s, force, inhibit_hairy_id) | |
950 | SCREEN_PTR s; | |
951 | int force; | |
952 | int inhibit_hairy_id; | |
953 | { | |
954 | register struct screen_glyphs *current_screen = SCREEN_CURRENT_GLYPHS (s); | |
955 | register struct screen_glyphs *desired_screen = SCREEN_DESIRED_GLYPHS (s); | |
956 | register int i; | |
957 | int pause; | |
958 | int preempt_count = baud_rate / 2400 + 1; | |
959 | extern input_pending; | |
960 | #ifdef HAVE_X_WINDOWS | |
961 | register int downto, leftmost; | |
962 | #endif | |
963 | ||
964 | if (SCREEN_HEIGHT (s) == 0) abort (); /* Some bug zeros some core */ | |
965 | ||
966 | detect_input_pending (); | |
967 | if (input_pending && !force) | |
968 | { | |
969 | pause = 1; | |
970 | goto do_pause; | |
971 | } | |
972 | ||
973 | update_begin (s); | |
974 | ||
975 | if (!line_ins_del_ok) | |
976 | inhibit_hairy_id = 1; | |
977 | ||
efb859b4 JB |
978 | /* See if any of the desired lines are enabled; don't compute for |
979 | i/d line if just want cursor motion. */ | |
4588ec20 JB |
980 | for (i = 0; i < SCREEN_HEIGHT (s); i++) |
981 | if (desired_screen->enable[i]) | |
982 | break; | |
983 | ||
984 | /* Try doing i/d line, if not yet inhibited. */ | |
985 | if (!inhibit_hairy_id && i < SCREEN_HEIGHT (s)) | |
986 | force |= scrolling (s); | |
987 | ||
988 | /* Update the individual lines as needed. Do bottom line first. */ | |
989 | ||
990 | if (desired_screen->enable[SCREEN_HEIGHT (s) - 1]) | |
991 | update_line (s, SCREEN_HEIGHT (s) - 1); | |
992 | ||
993 | #ifdef HAVE_X_WINDOWS | |
994 | if (SCREEN_IS_X (s)) | |
995 | { | |
996 | leftmost = downto = s->display.x->internal_border_width; | |
997 | if (desired_screen->enable[0]) | |
998 | { | |
999 | current_screen->top_left_x[SCREEN_HEIGHT (s) - 1] = leftmost; | |
1000 | current_screen->top_left_y[SCREEN_HEIGHT (s) - 1] | |
1001 | = PIXEL_HEIGHT (s) - s->display.x->internal_border_width | |
1002 | - LINE_HEIGHT(s, SCREEN_HEIGHT (s) - 1); | |
1003 | current_screen->top_left_x[0] = leftmost; | |
1004 | current_screen->top_left_y[0] = downto; | |
1005 | } | |
1006 | } | |
1007 | #endif /* HAVE_X_WINDOWS */ | |
1008 | ||
1009 | /* Now update the rest of the lines. */ | |
1010 | for (i = 0; i < SCREEN_HEIGHT (s) - 1 && (force || !input_pending); i++) | |
1011 | { | |
1012 | if (desired_screen->enable[i]) | |
1013 | { | |
1014 | if (SCREEN_IS_TERMCAP (s)) | |
1015 | { | |
1016 | /* Flush out every so many lines. | |
1017 | Also flush out if likely to have more than 1k buffered | |
1018 | otherwise. I'm told that some telnet connections get | |
1019 | really screwed by more than 1k output at once. */ | |
1020 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1021 | if (outq > 900 | |
1022 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1023 | { | |
1024 | fflush (stdout); | |
1025 | if (preempt_count == 1) | |
1026 | { | |
a41f8bed JB |
1027 | #ifdef EMACS_OUTQSIZE |
1028 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1029 | /* Probably not a tty. Ignore the error and reset |
1030 | * the outq count. */ | |
1031 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1032 | #endif | |
1033 | outq *= 10; | |
1034 | sleep (outq / baud_rate); | |
1035 | } | |
1036 | } | |
1037 | if ((i - 1) % preempt_count == 0) | |
1038 | detect_input_pending (); | |
1039 | } | |
1040 | ||
1041 | update_line (s, i); | |
1042 | #ifdef HAVE_X_WINDOWS | |
1043 | if (SCREEN_IS_X (s)) | |
1044 | { | |
1045 | current_screen->top_left_y[i] = downto; | |
1046 | current_screen->top_left_x[i] = leftmost; | |
1047 | } | |
1048 | #endif /* HAVE_X_WINDOWS */ | |
1049 | } | |
1050 | ||
1051 | if (SCREEN_IS_X (s)) | |
1052 | downto += LINE_HEIGHT(s, i); | |
1053 | } | |
1054 | pause = (i < SCREEN_HEIGHT (s) - 1) ? i : 0; | |
1055 | ||
1056 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1057 | if (!pause) | |
1058 | { | |
1059 | ||
1060 | if (s == selected_screen && cursor_in_echo_area < 0) | |
1061 | cursor_to (SCREEN_HEIGHT (s) - 1, 0); | |
1062 | else if (s == selected_screen && cursor_in_echo_area | |
1063 | && !desired_screen->used[SCREEN_HEIGHT (s) - 1]) | |
1064 | cursor_to (SCREEN_HEIGHT (s), 0); | |
1065 | else if (cursor_in_echo_area) | |
1066 | cursor_to (SCREEN_HEIGHT (s) - 1, | |
1067 | min (SCREEN_WIDTH (s) - 1, | |
1068 | desired_screen->used[SCREEN_HEIGHT (s) - 1])); | |
1069 | else | |
1070 | cursor_to (SCREEN_CURSOR_Y (s), max (min (SCREEN_CURSOR_X (s), | |
1071 | SCREEN_WIDTH (s) - 1), 0)); | |
1072 | } | |
1073 | ||
1074 | update_end (s); | |
1075 | ||
1076 | if (termscript) | |
1077 | fflush (termscript); | |
1078 | fflush (stdout); | |
1079 | ||
1080 | /* Here if output is preempted because input is detected. */ | |
1081 | do_pause: | |
1082 | ||
1083 | if (SCREEN_HEIGHT (s) == 0) abort (); /* Some bug zeros some core */ | |
1084 | display_completed = !pause; | |
1085 | ||
1086 | bzero (desired_screen->enable, SCREEN_HEIGHT (s)); | |
1087 | return pause; | |
1088 | } | |
1089 | ||
1090 | /* Called when about to quit, to check for doing so | |
1091 | at an improper time. */ | |
1092 | ||
1093 | void | |
1094 | quit_error_check () | |
1095 | { | |
1096 | if (SCREEN_DESIRED_GLYPHS (selected_screen) == 0) | |
1097 | return; | |
1098 | if (SCREEN_DESIRED_GLYPHS (selected_screen)->enable[0]) | |
1099 | abort (); | |
1100 | if (SCREEN_DESIRED_GLYPHS (selected_screen)->enable[SCREEN_HEIGHT (selected_screen) - 1]) | |
1101 | abort (); | |
1102 | } | |
1103 | \f | |
1104 | /* Decide what insert/delete line to do, and do it */ | |
1105 | ||
1106 | extern void scrolling_1 (); | |
1107 | ||
1108 | scrolling (screen) | |
1109 | SCREEN_PTR screen; | |
1110 | { | |
1111 | int unchanged_at_top, unchanged_at_bottom; | |
1112 | int window_size; | |
1113 | int changed_lines; | |
1114 | int *old_hash = (int *) alloca (SCREEN_HEIGHT (screen) * sizeof (int)); | |
1115 | int *new_hash = (int *) alloca (SCREEN_HEIGHT (screen) * sizeof (int)); | |
1116 | int *draw_cost = (int *) alloca (SCREEN_HEIGHT (screen) * sizeof (int)); | |
1117 | register int i; | |
1118 | int free_at_end_vpos = SCREEN_HEIGHT (screen); | |
1119 | register struct screen_glyphs *current_screen = SCREEN_CURRENT_GLYPHS (screen); | |
1120 | register struct screen_glyphs *desired_screen = SCREEN_DESIRED_GLYPHS (screen); | |
1121 | ||
1122 | /* Compute hash codes of all the lines. | |
1123 | Also calculate number of changed lines, | |
1124 | number of unchanged lines at the beginning, | |
1125 | and number of unchanged lines at the end. */ | |
1126 | ||
1127 | changed_lines = 0; | |
1128 | unchanged_at_top = 0; | |
1129 | unchanged_at_bottom = SCREEN_HEIGHT (screen); | |
1130 | for (i = 0; i < SCREEN_HEIGHT (screen); i++) | |
1131 | { | |
1132 | /* Give up on this scrolling if some old lines are not enabled. */ | |
1133 | if (!current_screen->enable[i]) | |
1134 | return 0; | |
1135 | old_hash[i] = line_hash_code (current_screen, i); | |
1136 | if (! desired_screen->enable[i]) | |
1137 | new_hash[i] = old_hash[i]; | |
1138 | else | |
1139 | new_hash[i] = line_hash_code (desired_screen, i); | |
1140 | ||
1141 | if (old_hash[i] != new_hash[i]) | |
1142 | { | |
1143 | changed_lines++; | |
1144 | unchanged_at_bottom = SCREEN_HEIGHT (screen) - i - 1; | |
1145 | } | |
1146 | else if (i == unchanged_at_top) | |
1147 | unchanged_at_top++; | |
1148 | draw_cost[i] = line_draw_cost (desired_screen, i); | |
1149 | } | |
1150 | ||
1151 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1152 | if (changed_lines < baud_rate / 2400 | |
1153 | || unchanged_at_bottom == SCREEN_HEIGHT (screen)) | |
1154 | return 1; | |
1155 | ||
1156 | window_size = (SCREEN_HEIGHT (screen) - unchanged_at_top | |
1157 | - unchanged_at_bottom); | |
1158 | ||
1159 | if (scroll_region_ok) | |
1160 | free_at_end_vpos -= unchanged_at_bottom; | |
1161 | else if (memory_below_screen) | |
1162 | free_at_end_vpos = -1; | |
1163 | ||
1164 | /* If large window, fast terminal and few lines in common between | |
1165 | current screen and desired screen, don't bother with i/d calc. */ | |
1166 | if (window_size >= 18 && baud_rate > 2400 | |
1167 | && (window_size >= | |
1168 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
1169 | SCREEN_HEIGHT (screen) - unchanged_at_bottom, | |
1170 | old_hash, new_hash, draw_cost))) | |
1171 | return 0; | |
1172 | ||
1173 | scrolling_1 (screen, window_size, unchanged_at_top, unchanged_at_bottom, | |
1174 | draw_cost + unchanged_at_top - 1, | |
1175 | old_hash + unchanged_at_top - 1, | |
1176 | new_hash + unchanged_at_top - 1, | |
1177 | free_at_end_vpos - unchanged_at_top); | |
1178 | ||
1179 | return 0; | |
1180 | } | |
1181 | \f | |
1182 | /* Return the offset in its buffer of the character at location col, line | |
1183 | in the given window. */ | |
1184 | int | |
1185 | buffer_posn_from_coords (window, col, line) | |
1186 | struct window *window; | |
1187 | int col, line; | |
1188 | { | |
1189 | int window_left = XFASTINT (window->left); | |
1190 | ||
1191 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1192 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1193 | window. */ | |
4588ec20 JB |
1194 | int window_width = (XFASTINT (window->width) - 1 |
1195 | - (XFASTINT (window->width) + window_left | |
1196 | != SCREEN_WIDTH (XSCREEN (window->screen)))); | |
1197 | ||
efb859b4 | 1198 | int startp = marker_position (window->start); |
4588ec20 JB |
1199 | |
1200 | /* Since compute_motion will only operate on the current buffer, | |
1201 | we need to save the old one and restore it when we're done. */ | |
1202 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1203 | struct position *posn; |
4588ec20 JB |
1204 | |
1205 | current_buffer = XBUFFER (window->buffer); | |
1206 | ||
efb859b4 JB |
1207 | /* It would be nice if we could use SCREEN_CURRENT_GLYPHS (XSCREEN |
1208 | (window->screen))->bufp to avoid scanning from the very top of | |
1209 | the window, but it isn't maintained correctly, and I'm not even | |
1210 | sure I will keep it. */ | |
1211 | posn = compute_motion (startp, 0, | |
1212 | (window == XWINDOW (minibuf_window) && startp == 1 | |
1213 | ? minibuf_prompt_width : 0), | |
1214 | ZV, line, col - window_left, | |
1215 | window_width, XINT (window->hscroll), 0); | |
4588ec20 JB |
1216 | |
1217 | current_buffer = old_current_buffer; | |
1218 | ||
efb859b4 JB |
1219 | /* compute_motion considers screen points past the end of a line |
1220 | to be *after* the newline, i.e. at the start of the next line. | |
1221 | This is reasonable, but not really what we want. So if the | |
1222 | result is on a line below LINE, back it up one character. */ | |
1223 | if (posn->vpos > line) | |
1224 | return posn->bufpos - 1; | |
1225 | else | |
1226 | return posn->bufpos; | |
4588ec20 JB |
1227 | } |
1228 | \f | |
1229 | static int | |
1230 | count_blanks (r) | |
1231 | register GLYPH *r; | |
1232 | { | |
1233 | register GLYPH *p = r; | |
1234 | while (*r++ == SPACEGLYPH); | |
1235 | return r - p - 1; | |
1236 | } | |
1237 | ||
1238 | static int | |
1239 | count_match (str1, str2) | |
1240 | GLYPH *str1, *str2; | |
1241 | { | |
1242 | register GLYPH *p1 = str1; | |
1243 | register GLYPH *p2 = str2; | |
1244 | while (*p1++ == *p2++); | |
1245 | return p1 - str1 - 1; | |
1246 | } | |
1247 | ||
1248 | /* Char insertion/deletion cost vector, from term.c */ | |
1249 | extern int *char_ins_del_vector; | |
1250 | ||
1251 | #define char_ins_del_cost(s) (&char_ins_del_vector[SCREEN_HEIGHT((s))]) | |
1252 | ||
1253 | static void | |
1254 | update_line (screen, vpos) | |
1255 | register SCREEN_PTR screen; | |
1256 | int vpos; | |
1257 | { | |
1258 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1259 | int tem; | |
1260 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1261 | int save; | |
1262 | register struct screen_glyphs *current_screen | |
1263 | = SCREEN_CURRENT_GLYPHS (screen); | |
1264 | register struct screen_glyphs *desired_screen | |
1265 | = SCREEN_DESIRED_GLYPHS (screen); | |
1266 | ||
1267 | if (desired_screen->highlight[vpos] | |
1268 | != (current_screen->enable[vpos] && current_screen->highlight[vpos])) | |
1269 | { | |
1270 | change_line_highlight (desired_screen->highlight[vpos], vpos, | |
1271 | (current_screen->enable[vpos] ? | |
1272 | current_screen->used[vpos] : 0)); | |
1273 | current_screen->enable[vpos] = 0; | |
1274 | } | |
1275 | else | |
1276 | reassert_line_highlight (desired_screen->highlight[vpos], vpos); | |
1277 | ||
1278 | if (! current_screen->enable[vpos]) | |
1279 | { | |
1280 | olen = 0; | |
1281 | } | |
1282 | else | |
1283 | { | |
1284 | obody = current_screen->glyphs[vpos]; | |
1285 | olen = current_screen->used[vpos]; | |
1286 | if (! current_screen->highlight[vpos]) | |
1287 | { | |
1288 | if (!must_write_spaces) | |
1289 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1290 | olen--; | |
1291 | } | |
1292 | else | |
1293 | { | |
1294 | /* For an inverse-video line, remember we gave it | |
1295 | spaces all the way to the screen edge | |
1296 | so that the reverse video extends all the way across. */ | |
1297 | ||
1298 | while (olen < SCREEN_WIDTH (screen) - 1) | |
1299 | obody[olen++] = SPACEGLYPH; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* One way or another, this will enable the line being updated. */ | |
1304 | current_screen->enable[vpos] = 1; | |
1305 | current_screen->used[vpos] = desired_screen->used[vpos]; | |
1306 | current_screen->highlight[vpos] = desired_screen->highlight[vpos]; | |
1307 | current_screen->bufp[vpos] = desired_screen->bufp[vpos]; | |
1308 | ||
1309 | #ifdef HAVE_X_WINDOWS | |
1310 | if (SCREEN_IS_X (screen)) | |
1311 | { | |
1312 | current_screen->pix_width[vpos] | |
1313 | = current_screen->used[vpos] | |
1314 | * FONT_WIDTH (screen->display.x->font); | |
1315 | current_screen->pix_height[vpos] | |
1316 | = FONT_HEIGHT (screen->display.x->font); | |
1317 | } | |
1318 | #endif /* HAVE_X_WINDOWS */ | |
1319 | ||
1320 | if (!desired_screen->enable[vpos]) | |
1321 | { | |
1322 | nlen = 0; | |
1323 | goto just_erase; | |
1324 | } | |
1325 | ||
1326 | nbody = desired_screen->glyphs[vpos]; | |
1327 | nlen = desired_screen->used[vpos]; | |
1328 | ||
1329 | /* Pretend trailing spaces are not there at all, | |
1330 | unless for one reason or another we must write all spaces. */ | |
1331 | if (! desired_screen->highlight[vpos]) | |
1332 | { | |
1333 | if (!must_write_spaces) | |
1334 | /* We know that the previous character byte contains 0. */ | |
1335 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1336 | nlen--; | |
1337 | } | |
1338 | else | |
1339 | { | |
1340 | /* For an inverse-video line, give it extra trailing spaces | |
1341 | all the way to the screen edge | |
1342 | so that the reverse video extends all the way across. */ | |
1343 | ||
1344 | while (nlen < SCREEN_WIDTH (screen) - 1) | |
1345 | nbody[nlen++] = SPACEGLYPH; | |
1346 | } | |
1347 | ||
1348 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1349 | if (!char_ins_del_ok) | |
1350 | { | |
1351 | int i,j; | |
1352 | ||
1353 | for (i = 0; i < nlen; i++) | |
1354 | { | |
1355 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1356 | { | |
1357 | cursor_to (vpos, i); | |
1358 | for (j = 1; (i + j < nlen && | |
1359 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1360 | j++); | |
1361 | ||
1362 | /* Output this run of non-matching chars. */ | |
1363 | write_glyphs (nbody + i, j); | |
1364 | i += j - 1; | |
1365 | ||
1366 | /* Now find the next non-match. */ | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1371 | if (olen > nlen) | |
1372 | { | |
1373 | cursor_to (vpos, nlen); | |
1374 | clear_end_of_line (olen); | |
1375 | } | |
1376 | ||
1377 | /* Exchange contents between current_screen and new_screen. */ | |
1378 | temp = desired_screen->glyphs[vpos]; | |
1379 | desired_screen->glyphs[vpos] = current_screen->glyphs[vpos]; | |
1380 | current_screen->glyphs[vpos] = temp; | |
1381 | ||
1382 | return; | |
1383 | } | |
1384 | ||
1385 | if (!olen) | |
1386 | { | |
1387 | nsp = (must_write_spaces || desired_screen->highlight[vpos]) | |
1388 | ? 0 : count_blanks (nbody); | |
1389 | if (nlen > nsp) | |
1390 | { | |
1391 | cursor_to (vpos, nsp); | |
1392 | write_glyphs (nbody + nsp, nlen - nsp); | |
1393 | } | |
1394 | ||
1395 | /* Exchange contents between current_screen and new_screen. */ | |
1396 | temp = desired_screen->glyphs[vpos]; | |
1397 | desired_screen->glyphs[vpos] = current_screen->glyphs[vpos]; | |
1398 | current_screen->glyphs[vpos] = temp; | |
1399 | ||
1400 | return; | |
1401 | } | |
1402 | ||
1403 | obody[olen] = 1; | |
1404 | save = nbody[nlen]; | |
1405 | nbody[nlen] = 0; | |
1406 | ||
1407 | /* Compute number of leading blanks in old and new contents. */ | |
1408 | osp = count_blanks (obody); | |
1409 | if (!desired_screen->highlight[vpos]) | |
1410 | nsp = count_blanks (nbody); | |
1411 | else | |
1412 | nsp = 0; | |
1413 | ||
1414 | /* Compute number of matching chars starting with first nonblank. */ | |
1415 | begmatch = count_match (obody + osp, nbody + nsp); | |
1416 | ||
1417 | /* Spaces in new match implicit space past the end of old. */ | |
1418 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1419 | if (!must_write_spaces && osp + begmatch == olen) | |
1420 | { | |
1421 | np1 = nbody + nsp; | |
1422 | while (np1[begmatch] == SPACEGLYPH) | |
1423 | begmatch++; | |
1424 | } | |
1425 | ||
1426 | /* Avoid doing insert/delete char | |
1427 | just cause number of leading spaces differs | |
1428 | when the following text does not match. */ | |
1429 | if (begmatch == 0 && osp != nsp) | |
1430 | osp = nsp = min (osp, nsp); | |
1431 | ||
1432 | /* Find matching characters at end of line */ | |
1433 | op1 = obody + olen; | |
1434 | np1 = nbody + nlen; | |
1435 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1436 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1437 | { | |
1438 | op1--; | |
1439 | np1--; | |
1440 | } | |
1441 | endmatch = obody + olen - op1; | |
1442 | ||
1443 | /* Put correct value back in nbody[nlen]. | |
1444 | This is important because direct_output_for_insert | |
1445 | can write into the line at a later point. | |
1446 | If this screws up the zero at the end of the line, re-establish it. */ | |
1447 | nbody[nlen] = save; | |
1448 | obody[olen] = 0; | |
1449 | ||
1450 | /* tem gets the distance to insert or delete. | |
1451 | endmatch is how many characters we save by doing so. | |
1452 | Is it worth it? */ | |
1453 | ||
1454 | tem = (nlen - nsp) - (olen - osp); | |
1455 | if (endmatch && tem | |
1456 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (screen)[tem])) | |
1457 | endmatch = 0; | |
1458 | ||
1459 | /* nsp - osp is the distance to insert or delete. | |
1460 | If that is nonzero, begmatch is known to be nonzero also. | |
1461 | begmatch + endmatch is how much we save by doing the ins/del. | |
1462 | Is it worth it? */ | |
1463 | ||
1464 | if (nsp != osp | |
1465 | && (!char_ins_del_ok | |
1466 | || begmatch + endmatch <= char_ins_del_cost (screen)[nsp - osp])) | |
1467 | { | |
1468 | begmatch = 0; | |
1469 | endmatch = 0; | |
1470 | osp = nsp = min (osp, nsp); | |
1471 | } | |
1472 | ||
1473 | /* Now go through the line, inserting, writing and | |
1474 | deleting as appropriate. */ | |
1475 | ||
1476 | if (osp > nsp) | |
1477 | { | |
1478 | cursor_to (vpos, nsp); | |
1479 | delete_glyphs (osp - nsp); | |
1480 | } | |
1481 | else if (nsp > osp) | |
1482 | { | |
1483 | /* If going to delete chars later in line | |
1484 | and insert earlier in the line, | |
1485 | must delete first to avoid losing data in the insert */ | |
1486 | if (endmatch && nlen < olen + nsp - osp) | |
1487 | { | |
1488 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1489 | delete_glyphs (olen + nsp - osp - nlen); | |
1490 | olen = nlen - (nsp - osp); | |
1491 | } | |
1492 | cursor_to (vpos, osp); | |
1493 | insert_glyphs ((char *)0, nsp - osp); | |
1494 | } | |
1495 | olen += nsp - osp; | |
1496 | ||
1497 | tem = nsp + begmatch + endmatch; | |
1498 | if (nlen != tem || olen != tem) | |
1499 | { | |
1500 | cursor_to (vpos, nsp + begmatch); | |
1501 | if (!endmatch || nlen == olen) | |
1502 | { | |
1503 | /* If new text being written reaches right margin, | |
1504 | there is no need to do clear-to-eol at the end. | |
1505 | (and it would not be safe, since cursor is not | |
1506 | going to be "at the margin" after the text is done) */ | |
1507 | if (nlen == SCREEN_WIDTH (screen)) | |
1508 | olen = 0; | |
1509 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1510 | ||
1511 | #ifdef obsolete | |
1512 | ||
1513 | /* the following code loses disastrously if tem == nlen. | |
1514 | Rather than trying to fix that case, I am trying the simpler | |
1515 | solution found above. */ | |
1516 | ||
1517 | /* If the text reaches to the right margin, | |
1518 | it will lose one way or another (depending on AutoWrap) | |
1519 | to clear to end of line after outputting all the text. | |
1520 | So pause with one character to go and clear the line then. */ | |
1521 | if (nlen == SCREEN_WIDTH (screen) && fast_clear_end_of_line && olen > nlen) | |
1522 | { | |
1523 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1524 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1525 | clear_end_of_line (olen); | |
1526 | olen = 0; /* Don't let it be cleared again later */ | |
1527 | write_glyphs (nbody + nlen - 1, 1); | |
1528 | } | |
1529 | else | |
1530 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1531 | #endif /* OBSOLETE */ | |
1532 | ||
1533 | } | |
1534 | else if (nlen > olen) | |
1535 | { | |
1536 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1537 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1538 | olen = nlen; | |
1539 | } | |
1540 | else if (olen > nlen) | |
1541 | { | |
1542 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1543 | delete_glyphs (olen - nlen); | |
1544 | olen = nlen; | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | just_erase: | |
1549 | /* If any unerased characters remain after the new line, erase them. */ | |
1550 | if (olen > nlen) | |
1551 | { | |
1552 | cursor_to (vpos, nlen); | |
1553 | clear_end_of_line (olen); | |
1554 | } | |
1555 | ||
1556 | /* Exchange contents between current_screen and new_screen. */ | |
1557 | temp = desired_screen->glyphs[vpos]; | |
1558 | desired_screen->glyphs[vpos] = current_screen->glyphs[vpos]; | |
1559 | current_screen->glyphs[vpos] = temp; | |
1560 | } | |
1561 | \f | |
1562 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1563 | 1, 1, "FOpen termscript file: ", | |
1564 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1565 | FILE = nil means just close any termscript file currently open.") | |
1566 | (file) | |
1567 | Lisp_Object file; | |
1568 | { | |
1569 | if (termscript != 0) fclose (termscript); | |
1570 | termscript = 0; | |
1571 | ||
efb859b4 | 1572 | if (! NILP (file)) |
4588ec20 JB |
1573 | { |
1574 | file = Fexpand_file_name (file, Qnil); | |
1575 | termscript = fopen (XSTRING (file)->data, "w"); | |
1576 | if (termscript == 0) | |
1577 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1578 | } | |
1579 | return Qnil; | |
1580 | } | |
1581 | \f | |
1582 | ||
1583 | #ifdef SIGWINCH | |
efb859b4 | 1584 | SIGTYPE |
4588ec20 JB |
1585 | window_change_signal () |
1586 | { | |
1587 | int width, height; | |
1588 | extern int errno; | |
1589 | int old_errno = errno; | |
1590 | ||
1591 | get_screen_size (&width, &height); | |
1592 | ||
1593 | /* The screen size change obviously applies to a termcap-controlled | |
1594 | screen. Find such a screen in the list, and assume it's the only | |
1595 | one (since the redisplay code always writes to stdout, not a | |
1596 | FILE * specified in the screen structure). Record the new size, | |
1597 | but don't reallocate the data structures now. Let that be done | |
1598 | later outside of the signal handler. */ | |
1599 | ||
1600 | { | |
1601 | Lisp_Object tail; | |
1602 | ||
1603 | for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
1604 | { | |
1605 | SCREEN_PTR s = XSCREEN (XCONS (tail)->car); | |
1606 | ||
efb859b4 | 1607 | if (SCREEN_IS_TERMCAP (s)) |
4588ec20 JB |
1608 | { |
1609 | ++in_display; | |
1610 | change_screen_size (s, height, width, 0); | |
1611 | --in_display; | |
1612 | break; | |
1613 | } | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | signal (SIGWINCH, window_change_signal); | |
1618 | errno = old_errno; | |
1619 | } | |
1620 | #endif /* SIGWINCH */ | |
1621 | ||
1622 | ||
1623 | /* Do any change in screen size that was requested by a signal. */ | |
1624 | ||
1625 | do_pending_window_change () | |
1626 | { | |
1627 | /* If window_change_signal should have run before, run it now. */ | |
1628 | while (delayed_size_change) | |
1629 | { | |
1630 | Lisp_Object tail; | |
1631 | ||
1632 | delayed_size_change = 0; | |
1633 | ||
1634 | for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
1635 | { | |
1636 | SCREEN_PTR s = XSCREEN (XCONS (tail)->car); | |
1637 | int height = SCREEN_NEW_HEIGHT (s); | |
1638 | int width = SCREEN_NEW_WIDTH (s); | |
1639 | ||
1640 | SCREEN_NEW_HEIGHT (s) = 0; | |
1641 | SCREEN_NEW_WIDTH (s) = 0; | |
1642 | ||
1643 | if (height != 0) | |
1644 | change_screen_size (s, height, width, 0); | |
1645 | } | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | ||
1650 | /* Change the screen height and/or width. Values may be given as zero to | |
1651 | indicate no change is to take place. */ | |
1652 | ||
1653 | change_screen_size (screen, newlength, newwidth, pretend) | |
1654 | register SCREEN_PTR screen; | |
1655 | register int newlength, newwidth, pretend; | |
1656 | { | |
1657 | /* If we can't deal with the change now, queue it for later. */ | |
1658 | if (in_display) | |
1659 | { | |
1660 | SCREEN_NEW_HEIGHT (screen) = newlength; | |
1661 | SCREEN_NEW_WIDTH (screen) = newwidth; | |
1662 | delayed_size_change = 1; | |
1663 | return; | |
1664 | } | |
1665 | ||
1666 | /* This size-change overrides any pending one for this screen. */ | |
1667 | SCREEN_NEW_HEIGHT (screen) = 0; | |
1668 | SCREEN_NEW_WIDTH (screen) = 0; | |
1669 | ||
1670 | if ((newlength == 0 || newlength == SCREEN_HEIGHT (screen)) | |
1671 | && (newwidth == 0 || newwidth == SCREEN_WIDTH (screen))) | |
1672 | return; | |
1673 | ||
1674 | if (newlength && newlength != SCREEN_HEIGHT (screen)) | |
1675 | { | |
efb859b4 JB |
1676 | if (SCREEN_HAS_MINIBUF (screen) |
1677 | && ! SCREEN_MINIBUF_ONLY_P (screen)) | |
4588ec20 JB |
1678 | { |
1679 | /* Screen has both root and minibuffer. */ | |
1680 | set_window_height (SCREEN_ROOT_WINDOW (screen), | |
1681 | newlength - 1, 0); | |
1682 | XFASTINT (XWINDOW (SCREEN_MINIBUF_WINDOW (screen))->top) | |
1683 | = newlength - 1; | |
1684 | set_window_height (SCREEN_MINIBUF_WINDOW (screen), 1, 0); | |
1685 | } | |
1686 | else | |
1687 | /* Screen has just one top-level window. */ | |
1688 | set_window_height (SCREEN_ROOT_WINDOW (screen), newlength, 0); | |
1689 | ||
efb859b4 | 1690 | if (SCREEN_IS_TERMCAP (screen) && !pretend) |
4588ec20 JB |
1691 | ScreenRows = newlength; |
1692 | ||
1693 | #if 0 | |
1694 | if (screen->output_method == output_termcap) | |
1695 | { | |
1696 | screen_height = newlength; | |
1697 | if (!pretend) | |
1698 | ScreenRows = newlength; | |
1699 | } | |
1700 | #endif | |
1701 | } | |
1702 | ||
1703 | if (newwidth && newwidth != SCREEN_WIDTH (screen)) | |
1704 | { | |
1705 | set_window_width (SCREEN_ROOT_WINDOW (screen), newwidth, 0); | |
efb859b4 | 1706 | if (SCREEN_HAS_MINIBUF (screen)) |
4588ec20 JB |
1707 | set_window_width (SCREEN_MINIBUF_WINDOW (screen), newwidth, 0); |
1708 | SCREEN_WIDTH (screen) = newwidth; | |
1709 | ||
1710 | if (SCREEN_IS_TERMCAP (screen) && !pretend) | |
1711 | ScreenCols = newwidth; | |
1712 | #if 0 | |
1713 | if (screen->output_method == output_termcap) | |
1714 | { | |
1715 | screen_width = newwidth; | |
1716 | if (!pretend) | |
1717 | ScreenCols = newwidth; | |
1718 | } | |
1719 | #endif | |
1720 | } | |
1721 | ||
1722 | if (newlength) | |
1723 | SCREEN_HEIGHT (screen) = newlength; | |
1724 | ||
1725 | remake_screen_glyphs (screen); | |
1726 | calculate_costs (screen); | |
1727 | } | |
1728 | \f | |
1729 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1730 | Ssend_string_to_terminal, 1, 1, 0, | |
1731 | "Send STRING to the terminal without alteration.\n\ | |
1732 | Control characters in STRING will have terminal-dependent effects.") | |
1733 | (str) | |
1734 | Lisp_Object str; | |
1735 | { | |
1736 | CHECK_STRING (str, 0); | |
1737 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1738 | fflush (stdout); | |
1739 | if (termscript) | |
1740 | { | |
1741 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1742 | fflush (termscript); | |
1743 | } | |
1744 | return Qnil; | |
1745 | } | |
1746 | ||
1747 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1748 | "Beep, or flash the screen.\n\ | |
1749 | Also, unless an argument is given,\n\ | |
1750 | terminate any keyboard macro currently executing.") | |
1751 | (arg) | |
1752 | Lisp_Object arg; | |
1753 | { | |
efb859b4 | 1754 | if (!NILP (arg)) |
4588ec20 | 1755 | { |
7fa788da RS |
1756 | if (noninteractive) |
1757 | putchar (07); | |
1758 | else | |
1759 | ring_bell (); | |
4588ec20 JB |
1760 | fflush (stdout); |
1761 | } | |
1762 | else | |
1763 | bitch_at_user (); | |
1764 | ||
1765 | return Qnil; | |
1766 | } | |
1767 | ||
1768 | bitch_at_user () | |
1769 | { | |
1770 | if (noninteractive) | |
1771 | putchar (07); | |
1772 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1773 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1774 | else | |
1775 | ring_bell (); | |
1776 | fflush (stdout); | |
1777 | } | |
1778 | ||
1779 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
1780 | "Pause, without updating display, for ARG seconds.\n\ | |
1781 | Optional second arg non-nil means ARG is measured in milliseconds.\n\ | |
1782 | \(Not all operating systems support milliseconds.)") | |
f76475ad JB |
1783 | (arg, millisec) |
1784 | Lisp_Object arg, millisec; | |
4588ec20 | 1785 | { |
4588ec20 JB |
1786 | int usec = 0; |
1787 | int sec; | |
1788 | ||
f76475ad JB |
1789 | CHECK_NUMBER (arg, 0); |
1790 | sec = XINT (arg); | |
4588ec20 JB |
1791 | if (sec <= 0) |
1792 | return Qnil; | |
1793 | ||
efb859b4 | 1794 | if (!NILP (millisec)) |
4588ec20 | 1795 | { |
a41f8bed | 1796 | #ifndef EMACS_HAS_USECS |
4588ec20 JB |
1797 | error ("millisecond sit-for not supported on %s", SYSTEM_TYPE); |
1798 | #else | |
1799 | usec = sec % 1000 * 1000; | |
1800 | sec /= 1000; | |
1801 | #endif | |
1802 | } | |
1803 | ||
f76475ad JB |
1804 | { |
1805 | Lisp_Object zero; | |
1806 | ||
1807 | XFASTINT (zero) = 0; | |
1808 | wait_reading_process_input (sec, usec, zero, 0); | |
1809 | } | |
d1af74e9 JB |
1810 | |
1811 | #if 0 /* No wait_reading_process_input */ | |
4588ec20 JB |
1812 | immediate_quit = 1; |
1813 | QUIT; | |
1814 | ||
1815 | #ifdef VMS | |
1816 | sys_sleep (sec); | |
1817 | #else /* not VMS */ | |
1818 | /* The reason this is done this way | |
1819 | (rather than defined (H_S) && defined (H_T)) | |
1820 | is because the VMS preprocessor doesn't grok `defined' */ | |
1821 | #ifdef HAVE_SELECT | |
a41f8bed JB |
1822 | EMACS_GET_TIME (end_time); |
1823 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 1824 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 1825 | |
4588ec20 JB |
1826 | while (1) |
1827 | { | |
a41f8bed JB |
1828 | EMACS_GET_TIME (timeout); |
1829 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1830 | if (EMACS_TIME_NEG_P (timeout) | |
1831 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
1832 | break; |
1833 | } | |
4588ec20 JB |
1834 | #else /* not HAVE_SELECT */ |
1835 | sleep (sec); | |
1836 | #endif /* HAVE_SELECT */ | |
1837 | #endif /* not VMS */ | |
1838 | ||
1839 | immediate_quit = 0; | |
1840 | #endif /* no subprocesses */ | |
1841 | ||
1842 | return Qnil; | |
1843 | } | |
1844 | ||
f76475ad JB |
1845 | /* This is just like wait_reading_process_input, except that |
1846 | it does the redisplay. | |
1847 | ||
1848 | It's also just like Fsit_for, except that it can be used for | |
1849 | waiting for input as well. */ | |
4588ec20 | 1850 | |
f76475ad JB |
1851 | Lisp_Object |
1852 | sit_for (sec, usec, reading, display) | |
1853 | int sec, usec, reading, display; | |
1854 | { | |
1855 | Lisp_Object read_kbd; | |
4588ec20 JB |
1856 | |
1857 | if (detect_input_pending ()) | |
1858 | return Qnil; | |
4588ec20 | 1859 | |
f76475ad JB |
1860 | if (display) |
1861 | redisplay_preserve_echo_area (); | |
4588ec20 | 1862 | |
dfdb645c JB |
1863 | if (sec == 0 && usec == 0) |
1864 | return Qt; | |
1865 | ||
4588ec20 JB |
1866 | #ifdef SIGIO |
1867 | gobble_input (); | |
f76475ad JB |
1868 | #endif |
1869 | ||
1870 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
1871 | wait_reading_process_input (sec, usec, read_kbd, display); | |
1872 | ||
d1af74e9 JB |
1873 | |
1874 | #if 0 /* No wait_reading_process_input available. */ | |
4588ec20 JB |
1875 | immediate_quit = 1; |
1876 | QUIT; | |
1877 | ||
1878 | waitchannels = 1; | |
1879 | #ifdef VMS | |
f76475ad | 1880 | input_wait_timeout (XINT (arg)); |
4588ec20 | 1881 | #else /* not VMS */ |
d1af74e9 JB |
1882 | #ifndef HAVE_TIMEVAL |
1883 | timeout_sec = sec; | |
1884 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
1885 | #else /* HAVE_TIMEVAL */ | |
1886 | timeout.tv_sec = sec; | |
1887 | timeout.tv_usec = usec; | |
4588ec20 | 1888 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 1889 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
1890 | #endif /* not VMS */ |
1891 | ||
1892 | immediate_quit = 0; | |
d1af74e9 | 1893 | #endif |
4588ec20 JB |
1894 | |
1895 | return detect_input_pending () ? Qnil : Qt; | |
1896 | } | |
1897 | ||
f76475ad JB |
1898 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
1899 | "Perform redisplay, then wait for ARG seconds or until input is available.\n\ | |
1900 | Optional second arg non-nil means ARG counts in milliseconds.\n\ | |
1901 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ | |
1902 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
1903 | if input is available before it starts.\n\ | |
1904 | Value is t if waited the full time with no input arriving.") | |
1905 | (arg, millisec, nodisp) | |
1906 | Lisp_Object arg, millisec, nodisp; | |
1907 | { | |
1908 | int usec = 0; | |
1909 | int sec = 0; | |
1910 | ||
1911 | CHECK_NUMBER (arg, 0); | |
1912 | ||
f76475ad JB |
1913 | if (!NILP (millisec)) |
1914 | { | |
1915 | #ifndef EMACS_HAS_USECS | |
1916 | error ("millisecond sit-for not supported on %s", SYSTEM_TYPE); | |
1917 | #else | |
1918 | usec = (sec % 1000) * 1000; | |
1919 | sec /= 1000; | |
1920 | #endif | |
1921 | } | |
1922 | ||
1923 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
1924 | } | |
1925 | ||
4588ec20 JB |
1926 | DEFUN ("sleep-for-millisecs", Fsleep_for_millisecs, Ssleep_for_millisecs, |
1927 | 1, 1, 0, | |
1928 | "Pause, without updating display, for ARG milliseconds.") | |
f76475ad JB |
1929 | (arg) |
1930 | Lisp_Object arg; | |
4588ec20 | 1931 | { |
f76475ad JB |
1932 | Lisp_Object zero; |
1933 | ||
a41f8bed | 1934 | #ifndef EMACS_HAS_USECS |
4588ec20 JB |
1935 | error ("sleep-for-millisecs not supported on %s", SYSTEM_TYPE); |
1936 | #else | |
f76475ad JB |
1937 | CHECK_NUMBER (arg, 0); |
1938 | ||
1939 | XFASTINT (zero) = 0; | |
1940 | wait_reading_process_input (XINT (arg) / 1000, XINT (arg) % 1000 * 1000, | |
1941 | zero, 0); | |
4588ec20 | 1942 | return Qnil; |
a41f8bed | 1943 | #endif /* EMACS_HAS_USECS */ |
4588ec20 JB |
1944 | } |
1945 | \f | |
1946 | char *terminal_type; | |
1947 | ||
1948 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
1949 | /* Determine terminal type and set terminal_driver */ | |
1950 | /* Then invoke its decoding routine to set up variables | |
1951 | in the terminal package */ | |
1952 | ||
1953 | init_display () | |
1954 | { | |
1955 | #ifdef HAVE_X_WINDOWS | |
1956 | extern int display_arg; | |
1957 | #endif | |
1958 | ||
1959 | meta_key = 0; | |
1960 | inverse_video = 0; | |
1961 | cursor_in_echo_area = 0; | |
1962 | terminal_type = (char *) 0; | |
1963 | ||
1964 | /* If the DISPLAY environment variable is set, try to use X, and | |
1965 | die with an error message if that doesn't work. */ | |
1966 | ||
1967 | /* Check if we're using a window system here before trying to | |
1968 | initialize the terminal. If we check the terminal first, | |
1969 | ||
1970 | If someone has indicated that they want | |
1971 | to use a window system, we shouldn't bother initializing the | |
1972 | terminal. This is especially important when the terminal is so | |
1973 | dumb that emacs gives up before and doesn't bother using the window | |
1974 | system. */ | |
1975 | ||
1976 | #ifdef HAVE_X_WINDOWS | |
efb859b4 | 1977 | if (!inhibit_window_system && (display_arg || getenv ("DISPLAY"))) |
4588ec20 JB |
1978 | { |
1979 | Vwindow_system = intern ("x"); | |
1980 | #ifdef HAVE_X11 | |
1981 | Vwindow_system_version = make_number (11); | |
1982 | #else | |
1983 | Vwindow_system_version = make_number (10); | |
1984 | #endif | |
1985 | return; | |
1986 | } | |
1987 | #endif /* HAVE_X_WINDOWS */ | |
1988 | ||
1989 | /* If no window system has been specified, try to use the terminal. */ | |
1990 | if (! isatty (0)) | |
1991 | { | |
1992 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
1993 | exit (1); | |
1994 | } | |
1995 | ||
1996 | /* Look at the TERM variable */ | |
1997 | terminal_type = (char *) getenv ("TERM"); | |
1998 | if (!terminal_type) | |
1999 | { | |
2000 | #ifdef VMS | |
2001 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2002 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2003 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2004 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2005 | #else | |
2006 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2007 | #endif | |
2008 | exit (1); | |
2009 | } | |
2010 | ||
2011 | #ifdef VMS | |
2012 | /* VMS DCL tends to upcase things, so downcase term type. | |
2013 | Hardly any uppercase letters in terminal types; should be none. */ | |
2014 | { | |
2015 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2016 | char *p; | |
2017 | ||
2018 | strcpy (new, terminal_type); | |
2019 | ||
2020 | for (p = new; *p; p++) | |
2021 | if (isupper (*p)) | |
2022 | *p = tolower (*p); | |
2023 | ||
2024 | terminal_type = new; | |
2025 | } | |
2026 | #endif | |
2027 | ||
2028 | term_init (terminal_type); | |
2029 | ||
2030 | remake_screen_glyphs (selected_screen); | |
2031 | calculate_costs (selected_screen); | |
2032 | ||
2033 | /* X and Y coordinates of the cursor between updates. */ | |
2034 | SCREEN_CURSOR_X (selected_screen) = 0; | |
2035 | SCREEN_CURSOR_Y (selected_screen) = 0; | |
2036 | ||
2037 | #ifdef SIGWINCH | |
2038 | #ifndef CANNOT_DUMP | |
2039 | if (initialized) | |
2040 | #endif /* CANNOT_DUMP */ | |
2041 | signal (SIGWINCH, window_change_signal); | |
2042 | #endif /* SIGWINCH */ | |
2043 | } | |
2044 | \f | |
2045 | syms_of_display () | |
2046 | { | |
2047 | #ifdef MULTI_SCREEN | |
2048 | defsubr (&Sredraw_screen); | |
2049 | #endif | |
2050 | defsubr (&Sredraw_display); | |
2051 | defsubr (&Sopen_termscript); | |
2052 | defsubr (&Sding); | |
2053 | defsubr (&Ssit_for); | |
2054 | defsubr (&Ssleep_for); | |
2055 | defsubr (&Ssend_string_to_terminal); | |
2056 | ||
2057 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2058 | "The output baud rate of the terminal.\n\ | |
2059 | On most systems, changing this value will affect the amount of padding\n\ | |
2060 | and the other strategic decisions made during redisplay."); | |
2061 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
2062 | "*Non-nil means invert the entire screen display.\n\ | |
2063 | This means everything is in inverse video which otherwise would not be."); | |
2064 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
2065 | "*Non-nil means try to flash the screen to represent a bell."); | |
2066 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, | |
2067 | "*Non-nil means no need to redraw entire screen after suspending.\n\ | |
2068 | A non-nil value is useful if the terminal can automatically preserve\n\ | |
2069 | Emacs's screen display when you reenter Emacs.\n\ | |
2070 | It is up to you to set this variable if your terminal can do that."); | |
2071 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2072 | "A symbol naming the window-system under which Emacs is running\n\ | |
2073 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2074 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2075 | "The version number of the window system in use.\n\ | |
2076 | For X windows, this is 10 or 11."); | |
2077 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2078 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2079 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
2080 | "Table defining how to output a glyph code to the screen.\n\ | |
2081 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ | |
2082 | Each element can be:\n\ | |
2083 | integer: a glyph code which this glyph is an alias for.\n\ | |
2084 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2085 | nil: this glyph mod 256 is char code to output,\n\ | |
2086 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2087 | Vglyph_table = Qnil; | |
2088 | ||
2089 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2090 | "Display table to use for buffers that specify none.\n\ | |
2091 | See `buffer-display-table' for more information."); | |
2092 | Vstandard_display_table = Qnil; | |
2093 | ||
2094 | /* Initialize `window-system', unless init_display already decided it. */ | |
2095 | #ifdef CANNOT_DUMP | |
2096 | if (noninteractive) | |
2097 | #endif | |
2098 | { | |
2099 | Vwindow_system = Qnil; | |
2100 | Vwindow_system_version = Qnil; | |
2101 | } | |
2102 | } | |
2103 |