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4588ec20 JB |
1 | /* Updating of data structures for redisplay. |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1990 Free Software Foundation, Inc. | |
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 | ||
27 | #ifdef NEED_TIME_H | |
28 | #include <time.h> | |
29 | #else /* not NEED_TIME_H */ | |
30 | #ifdef HAVE_TIMEVAL | |
31 | #include <sys/time.h> | |
32 | #endif /* HAVE_TIMEVAL */ | |
33 | #endif /* not NEED_TIME_H */ | |
34 | ||
35 | #ifdef HAVE_TERMIO | |
36 | #include <termio.h> | |
37 | #ifdef TCOUTQ | |
38 | #undef TIOCOUTQ | |
39 | #define TIOCOUTQ TCOUTQ | |
40 | #endif /* TCOUTQ defined */ | |
41 | #include <fcntl.h> | |
42 | #else | |
43 | #ifndef VMS | |
44 | #include <sys/ioctl.h> | |
45 | #endif /* not VMS */ | |
46 | #endif /* not HAVE_TERMIO */ | |
47 | ||
48 | /* Allow m- file to inhibit use of FIONREAD. */ | |
49 | #ifdef BROKEN_FIONREAD | |
50 | #undef FIONREAD | |
51 | #endif | |
52 | ||
53 | /* Interupt input is not used if there is no FIONREAD. */ | |
54 | #ifndef FIONREAD | |
55 | #undef SIGIO | |
56 | #endif | |
57 | ||
4588ec20 JB |
58 | #include "termchar.h" |
59 | #include "termopts.h" | |
60 | #include "cm.h" | |
61 | #include "lisp.h" | |
62 | #include "dispextern.h" | |
63 | #include "buffer.h" | |
64 | #include "screen.h" | |
65 | #include "window.h" | |
66 | #include "commands.h" | |
67 | #include "disptab.h" | |
68 | #include "indent.h" | |
69 | ||
70 | #ifdef HAVE_X_WINDOWS | |
71 | #include "xterm.h" | |
72 | #endif /* HAVE_X_WINDOWS */ | |
73 | ||
74 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
75 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
76 | ||
77 | #ifndef PENDING_OUTPUT_COUNT | |
78 | /* Get number of chars of output now in the buffer of a stdio stream. | |
79 | This ought to be built in in stdio, but it isn't. | |
80 | Some s- files override this because their stdio internals differ. */ | |
81 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) | |
82 | #endif | |
83 | ||
84 | /* Nonzero means do not assume anything about current | |
85 | contents of actual terminal screen */ | |
86 | ||
87 | int screen_garbaged; | |
88 | ||
89 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
90 | ||
91 | int display_completed; | |
92 | ||
93 | /* Lisp variable visible-bell; enables use of screen-flash | |
94 | instead of audible bell. */ | |
95 | ||
96 | int visible_bell; | |
97 | ||
98 | /* Invert the color of the whole screen, at a low level. */ | |
99 | ||
100 | int inverse_video; | |
101 | ||
102 | /* Line speed of the terminal. */ | |
103 | ||
104 | int baud_rate; | |
105 | ||
106 | /* nil or a symbol naming the window system under which emacs is | |
107 | running ('x is the only current possibility). */ | |
108 | ||
109 | Lisp_Object Vwindow_system; | |
110 | ||
111 | /* Version number of X windows: 10, 11 or nil. */ | |
112 | Lisp_Object Vwindow_system_version; | |
113 | ||
114 | /* Vector of glyph definitions. Indexed by glyph number, | |
115 | the contents are a string which is how to output the glyph. | |
116 | ||
117 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
118 | as a character code. */ | |
119 | ||
120 | Lisp_Object Vglyph_table; | |
121 | ||
122 | /* Display table to use for vectors that don't specify their own. */ | |
123 | ||
124 | Lisp_Object Vstandard_display_table; | |
125 | ||
126 | /* Nonzero means reading single-character input with prompt | |
127 | so put cursor on minibuffer after the prompt. */ | |
128 | ||
129 | int cursor_in_echo_area; | |
130 | \f | |
131 | /* The currently selected screen. | |
132 | In a single-screen version, this variable always remains 0. */ | |
133 | ||
134 | SCREEN_PTR selected_screen; | |
135 | ||
136 | /* In a single-screen version, the information that would otherwise | |
137 | exist inside a `struct screen' lives in the following variables instead. */ | |
138 | ||
139 | #ifndef MULTI_SCREEN | |
140 | ||
141 | /* Desired terminal cursor position (to show position of point), | |
142 | origin zero */ | |
143 | ||
144 | int cursX, cursY; | |
145 | ||
146 | /* Description of current screen contents */ | |
147 | ||
148 | struct screen_glyphs *current_glyphs; | |
149 | ||
150 | /* Description of desired screen contents */ | |
151 | ||
152 | struct screen_glyphs *desired_glyphs; | |
153 | ||
154 | #endif /* not MULTI_SCREEN */ | |
155 | ||
156 | /* This is a vector, made larger whenever it isn't large enough, | |
157 | which is used inside `update_screen' to hold the old contents | |
158 | of the SCREEN_PHYS_LINES of the screen being updated. */ | |
159 | struct screen_glyphs **ophys_lines; | |
160 | /* Length of vector currently allocated. */ | |
161 | int ophys_lines_length; | |
162 | ||
163 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
164 | ||
165 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
166 | ||
167 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
168 | ||
169 | int in_display; /* 1 if in redisplay: can't handle SIGWINCH now. */ | |
170 | ||
171 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ | |
172 | int delayed_screen_height; /* Remembered new screen height. */ | |
173 | int delayed_screen_width; /* Remembered new screen width. */ | |
174 | \f | |
175 | #ifdef MULTI_SCREEN | |
176 | ||
177 | DEFUN ("redraw-screen", Fredraw_screen, Sredraw_screen, 1, 1, 0, | |
178 | "Clear screen SCREEN and output again what is supposed to appear on it.") | |
179 | (screen) | |
180 | Lisp_Object screen; | |
181 | { | |
182 | SCREEN_PTR s; | |
183 | ||
efb859b4 | 184 | CHECK_LIVE_SCREEN (screen, 0); |
4588ec20 JB |
185 | s = XSCREEN (screen); |
186 | update_begin (s); | |
187 | /* set_terminal_modes (); */ | |
188 | clear_screen (); | |
189 | update_end (s); | |
190 | fflush (stdout); | |
191 | clear_screen_records (s); | |
192 | windows_or_buffers_changed++; | |
193 | /* Mark all windows as INaccurate, | |
194 | so that every window will have its redisplay done. */ | |
195 | mark_window_display_accurate (SCREEN_ROOT_WINDOW (s), 0); | |
196 | s->garbaged = 0; | |
197 | return Qnil; | |
198 | } | |
199 | ||
200 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
201 | "Redraw all screens marked as having their images garbled.") | |
202 | () | |
203 | { | |
204 | Lisp_Object screen, tail; | |
205 | ||
206 | for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
207 | { | |
208 | screen = XCONS (tail)->car; | |
209 | if (XSCREEN (screen)->garbaged && XSCREEN (screen)->visible) | |
210 | Fredraw_screen (screen); | |
211 | } | |
212 | return Qnil; | |
213 | } | |
214 | ||
215 | redraw_screen (s) | |
216 | SCREEN_PTR s; | |
217 | { | |
218 | Lisp_Object screen; | |
219 | XSET (screen, Lisp_Screen, s); | |
220 | Fredraw_screen (screen); | |
221 | } | |
222 | ||
223 | #else /* not MULTI_SCREEN */ | |
224 | ||
225 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, 0, | |
226 | "Clear screen and output again what is supposed to appear on it.") | |
227 | () | |
228 | { | |
229 | update_begin (0); | |
230 | set_terminal_modes (); | |
231 | clear_screen (); | |
232 | update_end (0); | |
233 | fflush (stdout); | |
234 | clear_screen_records (0); | |
235 | windows_or_buffers_changed++; | |
236 | /* Mark all windows as INaccurate, | |
237 | so that every window will have its redisplay done. */ | |
238 | mark_window_display_accurate (XWINDOW (minibuf_window)->prev, 0); | |
239 | return Qnil; | |
240 | } | |
241 | ||
242 | #endif /* not MULTI_SCREEN */ | |
243 | \f | |
244 | static struct screen_glyphs * | |
245 | make_screen_glyphs (screen, empty) | |
246 | register SCREEN_PTR screen; | |
247 | int empty; | |
248 | { | |
249 | register int i; | |
250 | register width = SCREEN_WIDTH (screen); | |
251 | register height = SCREEN_HEIGHT (screen); | |
252 | register struct screen_glyphs *new = | |
253 | (struct screen_glyphs *) xmalloc (sizeof (struct screen_glyphs)); | |
254 | ||
255 | SET_GLYPHS_SCREEN (new, screen); | |
256 | new->height = height; | |
257 | new->width = width; | |
258 | new->used = (int *) xmalloc (height * sizeof (int)); | |
259 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
260 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
261 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
262 | bzero (new->enable, height * sizeof (char)); | |
263 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
264 | ||
265 | #ifdef HAVE_X_WINDOWS | |
266 | if (SCREEN_IS_X (screen)) | |
267 | { | |
268 | new->nruns = (int *) xmalloc (height * sizeof (int)); | |
269 | new->face_list | |
270 | = (struct run **) xmalloc (height * sizeof (struct run *)); | |
271 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); | |
272 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
273 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
274 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
275 | } | |
276 | #endif | |
277 | ||
278 | if (empty) | |
279 | { | |
280 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
281 | used as temporary storage when updating the screen. See scroll.c. */ | |
282 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); | |
283 | ||
284 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
285 | bzero (new->total_contents, total_glyphs); | |
286 | } | |
287 | else | |
288 | { | |
289 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
290 | ||
291 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
292 | bzero (new->total_contents, total_glyphs); | |
293 | for (i = 0; i < height; i++) | |
294 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
295 | } | |
296 | ||
297 | return new; | |
298 | } | |
299 | ||
300 | static void | |
301 | free_screen_glyphs (screen, glyphs) | |
302 | SCREEN_PTR screen; | |
303 | struct screen_glyphs *glyphs; | |
304 | { | |
305 | if (glyphs->total_contents) | |
306 | free (glyphs->total_contents); | |
307 | ||
308 | free (glyphs->used); | |
309 | free (glyphs->glyphs); | |
310 | free (glyphs->highlight); | |
311 | free (glyphs->enable); | |
312 | free (glyphs->bufp); | |
313 | ||
314 | #ifdef HAVE_X_WINDOWS | |
315 | if (SCREEN_IS_X (screen)) | |
316 | { | |
317 | free (glyphs->nruns); | |
318 | free (glyphs->face_list); | |
319 | free (glyphs->top_left_x); | |
320 | free (glyphs->top_left_y); | |
321 | free (glyphs->pix_width); | |
322 | free (glyphs->pix_height); | |
323 | } | |
324 | #endif | |
325 | ||
326 | free (glyphs); | |
327 | } | |
328 | ||
329 | static void | |
330 | remake_screen_glyphs (screen) | |
331 | SCREEN_PTR screen; | |
332 | { | |
333 | if (SCREEN_CURRENT_GLYPHS (screen)) | |
334 | free_screen_glyphs (screen, SCREEN_CURRENT_GLYPHS (screen)); | |
335 | if (SCREEN_DESIRED_GLYPHS (screen)) | |
336 | free_screen_glyphs (screen, SCREEN_DESIRED_GLYPHS (screen)); | |
337 | if (SCREEN_TEMP_GLYPHS (screen)) | |
338 | free_screen_glyphs (screen, SCREEN_TEMP_GLYPHS (screen)); | |
339 | ||
340 | if (SCREEN_MESSAGE_BUF (screen)) | |
341 | SCREEN_MESSAGE_BUF (screen) | |
342 | = (char *) xrealloc (SCREEN_MESSAGE_BUF (screen), | |
343 | SCREEN_WIDTH (screen) + 1); | |
344 | else | |
345 | SCREEN_MESSAGE_BUF (screen) | |
346 | = (char *) xmalloc (SCREEN_WIDTH (screen) + 1); | |
347 | ||
348 | SCREEN_CURRENT_GLYPHS (screen) = make_screen_glyphs (screen, 0); | |
349 | SCREEN_DESIRED_GLYPHS (screen) = make_screen_glyphs (screen, 0); | |
350 | SCREEN_TEMP_GLYPHS (screen) = make_screen_glyphs (screen, 1); | |
351 | SET_SCREEN_GARBAGED (screen); | |
352 | } | |
353 | \f | |
354 | /* Return the hash code of contents of line VPOS in screen-matrix M. */ | |
355 | ||
356 | static int | |
357 | line_hash_code (m, vpos) | |
358 | register struct screen_glyphs *m; | |
359 | int vpos; | |
360 | { | |
361 | register GLYPH *body, *end; | |
362 | register int h = 0; | |
363 | ||
364 | if (!m->enable[vpos]) | |
365 | return 0; | |
366 | ||
367 | /* Give all lighlighted lines the same hash code | |
368 | so as to encourage scrolling to leave them in place. */ | |
369 | if (m->highlight[vpos]) | |
370 | return -1; | |
371 | ||
372 | body = m->glyphs[vpos]; | |
373 | ||
374 | if (must_write_spaces) | |
375 | while (1) | |
376 | { | |
377 | GLYPH g = *body++; | |
378 | ||
379 | if (g == 0) | |
380 | break; | |
381 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
382 | } | |
383 | else | |
384 | while (1) | |
385 | { | |
386 | GLYPH g = *body++; | |
387 | ||
388 | if (g == 0) | |
389 | break; | |
390 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
391 | } | |
392 | ||
393 | if (h) | |
394 | return h; | |
395 | return 1; | |
396 | } | |
397 | ||
398 | /* Return number of characters in line in M at vpos VPOS, | |
399 | except don't count leading and trailing spaces | |
400 | unless the terminal requires those to be explicitly output. */ | |
401 | ||
402 | static unsigned int | |
403 | line_draw_cost (m, vpos) | |
404 | struct screen_glyphs *m; | |
405 | int vpos; | |
406 | { | |
407 | register GLYPH *beg = m->glyphs[vpos]; | |
408 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
409 | register int i; | |
410 | register int tlen = GLYPH_TABLE_LENGTH; | |
411 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
412 | ||
413 | /* Ignore trailing and leading spaces if we can. */ | |
414 | if (!must_write_spaces) | |
415 | { | |
416 | while ((end != beg) && (*end == SPACEGLYPH)) | |
417 | --end; | |
418 | if (end == beg) | |
419 | return (0); /* All blank line. */ | |
420 | ||
421 | while (*beg == SPACEGLYPH) | |
422 | ++beg; | |
423 | } | |
424 | ||
425 | /* If we don't have a glyph-table, each glyph is one character, | |
426 | so return the number of glyphs. */ | |
427 | if (tbase == 0) | |
428 | return end - beg; | |
429 | ||
430 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
431 | i = 0; | |
432 | while ((beg <= end) && *beg) | |
433 | { | |
434 | register GLYPH g = *beg++; | |
435 | ||
436 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
437 | i += 1; | |
438 | else | |
439 | i += GLYPH_LENGTH (tbase, g); | |
440 | } | |
441 | return i; | |
442 | } | |
443 | \f | |
444 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
445 | ||
446 | The only other interface into redisplay is through setting | |
447 | SCREEN_CURSOR_X (screen) and SCREEN_CURSOR_Y (screen) | |
448 | and SET_SCREEN_GARBAGED (screen). */ | |
449 | ||
450 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
451 | ||
452 | cancel_line (vpos, screen) | |
453 | int vpos; | |
454 | register SCREEN_PTR screen; | |
455 | { | |
456 | SCREEN_DESIRED_GLYPHS (screen)->enable[vpos] = 0; | |
457 | } | |
458 | ||
459 | clear_screen_records (screen) | |
460 | register SCREEN_PTR screen; | |
461 | { | |
462 | bzero (SCREEN_CURRENT_GLYPHS (screen)->enable, SCREEN_HEIGHT (screen)); | |
463 | } | |
464 | ||
465 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
466 | ||
467 | void | |
468 | get_display_line (screen, vpos, hpos) | |
469 | register SCREEN_PTR screen; | |
470 | int vpos; | |
471 | register int hpos; | |
472 | { | |
473 | register struct screen_glyphs *glyphs; | |
474 | register struct screen_glyphs *desired_glyphs = SCREEN_DESIRED_GLYPHS (screen); | |
475 | register GLYPH *p; | |
476 | ||
477 | if (vpos < 0 || (! SCREEN_VISIBLE_P (screen))) | |
478 | abort (); | |
479 | ||
480 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
481 | abort (); | |
482 | ||
483 | if (! desired_glyphs->enable[vpos]) | |
484 | { | |
485 | desired_glyphs->used[vpos] = 0; | |
486 | desired_glyphs->highlight[vpos] = 0; | |
487 | desired_glyphs->enable[vpos] = 1; | |
488 | } | |
489 | ||
490 | if (hpos > desired_glyphs->used[vpos]) | |
491 | { | |
492 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
493 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
494 | ||
495 | desired_glyphs->used[vpos] = hpos; | |
496 | while (g != end) | |
497 | *g++ = SPACEGLYPH; | |
498 | } | |
499 | } | |
500 | ||
501 | /* Like bcopy except never gets confused by overlap. */ | |
502 | ||
503 | void | |
504 | safe_bcopy (from, to, size) | |
505 | char *from, *to; | |
506 | int size; | |
507 | { | |
508 | register char *endf; | |
509 | register char *endt; | |
510 | ||
511 | if (size == 0) | |
512 | return; | |
513 | ||
514 | /* If destination is higher in memory, and overlaps source zone, | |
515 | copy from the end. */ | |
516 | if (from < to && from + size > to) | |
517 | { | |
518 | endf = from + size; | |
519 | endt = to + size; | |
520 | ||
521 | /* If TO - FROM is large, then we should break the copy into | |
522 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
523 | TO - FROM is small, then the bcopy function call overhead | |
524 | makes this not worth it. The crossover point could be about | |
525 | anywhere. Since I don't think the obvious copy loop is ever | |
526 | too bad, I'm trying to err in its favor. */ | |
527 | if (to - from < 64) | |
528 | { | |
529 | do | |
530 | *--endt = *--endf; | |
531 | while (endf != from); | |
532 | } | |
533 | else | |
534 | { | |
98038dc0 JB |
535 | /* Since TO - FROM >= 64, the overlap is less than SIZE, |
536 | so we can always safely do this loop once. */ | |
4588ec20 JB |
537 | while (endt > to) |
538 | { | |
539 | endt -= (to - from); | |
540 | endf -= (to - from); | |
541 | ||
542 | bcopy (endf, endt, to - from); | |
543 | } | |
544 | ||
545 | /* If TO - FROM wasn't a multiple of SIZE, there will be a | |
546 | little left over. The amount left over is | |
547 | (endt + (to - from)) - to, which is endt - from. */ | |
548 | bcopy (from, to, endt - from); | |
549 | } | |
550 | } | |
551 | else | |
552 | bcopy (from, to, size); | |
553 | } | |
554 | ||
555 | #if 0 | |
556 | void | |
557 | safe_bcopy (from, to, size) | |
558 | char *from, *to; | |
559 | int size; | |
560 | { | |
561 | register char *endf; | |
562 | register char *endt; | |
563 | ||
564 | if (size == 0) | |
565 | return; | |
566 | ||
567 | /* If destination is higher in memory, and overlaps source zone, | |
568 | copy from the end. */ | |
569 | if (from < to && from + size > to) | |
570 | { | |
571 | endf = from + size; | |
572 | endt = to + size; | |
573 | ||
574 | do | |
575 | *--endt = *--endf; | |
576 | while (endf != from); | |
577 | ||
578 | return; | |
579 | } | |
580 | ||
581 | bcopy (from, to, size); | |
582 | } | |
583 | #endif | |
584 | ||
98038dc0 | 585 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
586 | DISTANCE may be negative. */ |
587 | ||
588 | static void | |
589 | rotate_vector (vector, size, distance) | |
590 | char *vector; | |
591 | int size; | |
592 | int distance; | |
593 | { | |
594 | char *temp = (char *) alloca (size); | |
595 | ||
596 | if (distance < 0) | |
597 | distance += size; | |
598 | ||
599 | bcopy (vector, temp + distance, size - distance); | |
600 | bcopy (vector + size - distance, temp, distance); | |
601 | bcopy (temp, vector, size); | |
602 | } | |
603 | ||
604 | /* Scroll lines from vpos FROM up to but not including vpos END | |
605 | down by AMOUNT lines (AMOUNT may be negative). | |
606 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
607 | ||
608 | int | |
609 | scroll_screen_lines (screen, from, end, amount) | |
610 | register SCREEN_PTR screen; | |
611 | int from, end, amount; | |
612 | { | |
613 | register int i; | |
614 | register struct screen_glyphs *current_screen | |
615 | = SCREEN_CURRENT_GLYPHS (screen); | |
616 | ||
617 | if (!line_ins_del_ok) | |
618 | return 0; | |
619 | ||
620 | if (amount == 0) | |
621 | return 1; | |
622 | ||
623 | if (amount > 0) | |
624 | { | |
625 | update_begin (screen); | |
626 | set_terminal_window (end + amount); | |
627 | if (!scroll_region_ok) | |
628 | ins_del_lines (end, -amount); | |
629 | ins_del_lines (from, amount); | |
630 | set_terminal_window (0); | |
631 | ||
632 | rotate_vector (current_screen->glyphs + from, | |
633 | sizeof (GLYPH *) * (end + amount - from), | |
634 | amount * sizeof (GLYPH *)); | |
635 | ||
636 | safe_bcopy (current_screen->used + from, | |
637 | current_screen->used + from + amount, | |
638 | (end - from) * sizeof current_screen->used[0]); | |
639 | ||
640 | safe_bcopy (current_screen->highlight + from, | |
641 | current_screen->highlight + from + amount, | |
642 | (end - from) * sizeof current_screen->highlight[0]); | |
643 | ||
644 | safe_bcopy (current_screen->enable + from, | |
645 | current_screen->enable + from + amount, | |
646 | (end - from) * sizeof current_screen->enable[0]); | |
647 | ||
648 | /* Mark the lines made empty by scrolling as enabled, empty and | |
649 | normal video. */ | |
650 | bzero (current_screen->used + from, | |
651 | amount * sizeof current_screen->used[0]); | |
652 | bzero (current_screen->highlight + from, | |
653 | amount * sizeof current_screen->highlight[0]); | |
654 | for (i = from; i < from + amount; i++) | |
655 | { | |
656 | current_screen->glyphs[i][0] = '\0'; | |
657 | current_screen->enable[i] = 1; | |
658 | } | |
659 | ||
660 | safe_bcopy (current_screen->bufp + from, | |
661 | current_screen->bufp + from + amount, | |
662 | (end - from) * sizeof current_screen->bufp[0]); | |
663 | ||
664 | #ifdef HAVE_X_WINDOWS | |
665 | if (SCREEN_IS_X (screen)) | |
666 | { | |
667 | safe_bcopy (current_screen->nruns + from, | |
668 | current_screen->nruns + from + amount, | |
669 | (end - from) * sizeof current_screen->nruns[0]); | |
670 | ||
671 | safe_bcopy (current_screen->face_list + from, | |
672 | current_screen->face_list + from + amount, | |
673 | (end - from) * sizeof current_screen->face_list[0]); | |
674 | ||
675 | safe_bcopy (current_screen->top_left_x + from, | |
676 | current_screen->top_left_x + from + amount, | |
677 | (end - from) * sizeof current_screen->top_left_x[0]); | |
678 | ||
679 | safe_bcopy (current_screen->top_left_y + from, | |
680 | current_screen->top_left_y + from + amount, | |
681 | (end - from) * sizeof current_screen->top_left_y[0]); | |
682 | ||
683 | safe_bcopy (current_screen->pix_width + from, | |
684 | current_screen->pix_width + from + amount, | |
685 | (end - from) * sizeof current_screen->pix_width[0]); | |
686 | ||
687 | safe_bcopy (current_screen->pix_height + from, | |
688 | current_screen->pix_height + from + amount, | |
689 | (end - from) * sizeof current_screen->pix_height[0]); | |
690 | } | |
691 | #endif /* HAVE_X_WINDOWS */ | |
692 | ||
693 | update_end (screen); | |
694 | } | |
695 | if (amount < 0) | |
696 | { | |
697 | update_begin (screen); | |
698 | set_terminal_window (end); | |
699 | ins_del_lines (from + amount, amount); | |
700 | if (!scroll_region_ok) | |
701 | ins_del_lines (end + amount, -amount); | |
702 | set_terminal_window (0); | |
703 | ||
704 | rotate_vector (current_screen->glyphs + from + amount, | |
705 | sizeof (GLYPH *) * (end - from - amount), | |
706 | amount * sizeof (GLYPH *)); | |
707 | ||
708 | safe_bcopy (current_screen->used + from, | |
709 | current_screen->used + from + amount, | |
710 | (end - from) * sizeof current_screen->used[0]); | |
711 | ||
712 | safe_bcopy (current_screen->highlight + from, | |
713 | current_screen->highlight + from + amount, | |
714 | (end - from) * sizeof current_screen->highlight[0]); | |
715 | ||
716 | safe_bcopy (current_screen->enable + from, | |
717 | current_screen->enable + from + amount, | |
718 | (end - from) * sizeof current_screen->enable[0]); | |
719 | ||
720 | /* Mark the lines made empty by scrolling as enabled, empty and | |
721 | normal video. */ | |
722 | bzero (current_screen->used + end + amount, | |
723 | - amount * sizeof current_screen->used[0]); | |
724 | bzero (current_screen->highlight + end + amount, | |
725 | - amount * sizeof current_screen->highlight[0]); | |
726 | for (i = end + amount; i < end; i++) | |
727 | { | |
728 | current_screen->glyphs[i][0] = '\0'; | |
729 | current_screen->enable[i] = 1; | |
730 | } | |
731 | ||
732 | safe_bcopy (current_screen->bufp + from, | |
733 | current_screen->bufp + from + amount, | |
734 | (end - from) * sizeof current_screen->bufp[0]); | |
735 | ||
736 | #ifdef HAVE_X_WINDOWS | |
737 | if (SCREEN_IS_X (screen)) | |
738 | { | |
739 | safe_bcopy (current_screen->nruns + from, | |
740 | current_screen->nruns + from + amount, | |
741 | (end - from) * sizeof current_screen->nruns[0]); | |
742 | ||
743 | safe_bcopy (current_screen->face_list + from, | |
744 | current_screen->face_list + from + amount, | |
745 | (end - from) * sizeof current_screen->face_list[0]); | |
746 | ||
747 | safe_bcopy (current_screen->top_left_x + from, | |
748 | current_screen->top_left_x + from + amount, | |
749 | (end - from) * sizeof current_screen->top_left_x[0]); | |
750 | ||
751 | safe_bcopy (current_screen->top_left_y + from, | |
752 | current_screen->top_left_y + from + amount, | |
753 | (end - from) * sizeof current_screen->top_left_y[0]); | |
754 | ||
755 | safe_bcopy (current_screen->pix_width + from, | |
756 | current_screen->pix_width + from + amount, | |
757 | (end - from) * sizeof current_screen->pix_width[0]); | |
758 | ||
759 | safe_bcopy (current_screen->pix_height + from, | |
760 | current_screen->pix_height + from + amount, | |
761 | (end - from) * sizeof current_screen->pix_height[0]); | |
762 | } | |
763 | #endif /* HAVE_X_WINDOWS */ | |
764 | ||
765 | update_end (screen); | |
766 | } | |
767 | return 1; | |
768 | } | |
769 | \f | |
770 | /* After updating a window W that isn't the full screen wide, | |
771 | copy all the columns that W does not occupy | |
772 | into the SCREEN_DESIRED_GLYPHS (screen) from the SCREEN_PHYS_GLYPHS (screen) | |
773 | so that update_screen will not change those columns. */ | |
774 | ||
775 | preserve_other_columns (w) | |
776 | struct window *w; | |
777 | { | |
778 | register int vpos; | |
779 | register struct screen_glyphs *current_screen, *desired_screen; | |
780 | register SCREEN_PTR screen = XSCREEN (w->screen); | |
781 | int start = XFASTINT (w->left); | |
782 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
783 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
784 | ||
785 | current_screen = SCREEN_CURRENT_GLYPHS (screen); | |
786 | desired_screen = SCREEN_DESIRED_GLYPHS (screen); | |
787 | ||
788 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
789 | { | |
790 | if (current_screen->enable[vpos] && desired_screen->enable[vpos]) | |
791 | { | |
792 | if (start > 0) | |
793 | { | |
794 | int len; | |
795 | ||
796 | bcopy (current_screen->glyphs[vpos], | |
797 | desired_screen->glyphs[vpos], start); | |
798 | len = min (start, current_screen->used[vpos]); | |
799 | if (desired_screen->used[vpos] < len) | |
800 | desired_screen->used[vpos] = len; | |
801 | } | |
802 | if (current_screen->used[vpos] > end | |
803 | && desired_screen->used[vpos] < current_screen->used[vpos]) | |
804 | { | |
805 | while (desired_screen->used[vpos] < end) | |
806 | desired_screen->glyphs[vpos][desired_screen->used[vpos]++] | |
807 | = SPACEGLYPH; | |
808 | bcopy (current_screen->glyphs[vpos] + end, | |
809 | desired_screen->glyphs[vpos] + end, | |
810 | current_screen->used[vpos] - end); | |
811 | desired_screen->used[vpos] = current_screen->used[vpos]; | |
812 | } | |
813 | } | |
814 | } | |
815 | } | |
816 | \f | |
817 | #if 0 | |
818 | ||
819 | /* If window w does not need to be updated and isn't the full screen wide, | |
820 | copy all the columns that w does occupy | |
821 | into the SCREEN_DESIRED_LINES (screen) from the SCREEN_PHYS_LINES (screen) | |
822 | so that update_screen will not change those columns. | |
823 | ||
824 | Have not been able to figure out how to use this correctly. */ | |
825 | ||
826 | preserve_my_columns (w) | |
827 | struct window *w; | |
828 | { | |
829 | register int vpos, fin; | |
830 | register struct screen_glyphs *l1, *l2; | |
831 | register SCREEN_PTR screen = XSCREEN (w->screen); | |
832 | int start = XFASTINT (w->left); | |
833 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
834 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
835 | ||
836 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
837 | { | |
838 | if ((l1 = SCREEN_DESIRED_GLYPHS (screen)->glyphs[vpos + 1]) | |
839 | && (l2 = SCREEN_PHYS_GLYPHS (screen)->glyphs[vpos + 1])) | |
840 | { | |
841 | if (l2->length > start && l1->length < l2->length) | |
842 | { | |
843 | fin = l2->length; | |
844 | if (fin > end) fin = end; | |
845 | while (l1->length < start) | |
846 | l1->body[l1->length++] = ' '; | |
847 | bcopy (l2->body + start, l1->body + start, fin - start); | |
848 | l1->length = fin; | |
849 | } | |
850 | } | |
851 | } | |
852 | } | |
853 | ||
854 | #endif | |
855 | \f | |
856 | /* On discovering that the redisplay for a window was no good, | |
857 | cancel the columns of that window, so that when the window is | |
858 | displayed over again get_display_line will not complain. */ | |
859 | ||
860 | cancel_my_columns (w) | |
861 | struct window *w; | |
862 | { | |
863 | register int vpos; | |
864 | register SCREEN_PTR screen = XSCREEN (w->screen); | |
865 | register struct screen_glyphs *desired_glyphs = screen->desired_glyphs; | |
866 | register int start = XFASTINT (w->left); | |
867 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
868 | ||
869 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
870 | if (desired_glyphs->enable[vpos] | |
871 | && desired_glyphs->used[vpos] >= start) | |
872 | desired_glyphs->used[vpos] = start; | |
873 | } | |
874 | \f | |
875 | /* These functions try to perform directly and immediately on the screen | |
876 | the necessary output for one change in the buffer. | |
877 | They may return 0 meaning nothing was done if anything is difficult, | |
878 | or 1 meaning the output was performed properly. | |
879 | They assume that the screen was up to date before the buffer | |
880 | change being displayed. THey make various other assumptions too; | |
881 | see command_loop_1 where these are called. */ | |
882 | ||
883 | int | |
884 | direct_output_for_insert (g) | |
885 | int g; | |
886 | { | |
887 | register SCREEN_PTR screen = selected_screen; | |
888 | register struct screen_glyphs *current_screen | |
889 | = SCREEN_CURRENT_GLYPHS (screen); | |
890 | ||
891 | #ifndef COMPILER_REGISTER_BUG | |
892 | register | |
893 | #endif /* COMPILER_REGISTER_BUG */ | |
894 | struct window *w = XWINDOW (selected_window); | |
895 | #ifndef COMPILER_REGISTER_BUG | |
896 | register | |
897 | #endif /* COMPILER_REGISTER_BUG */ | |
898 | int hpos = SCREEN_CURSOR_X (screen); | |
899 | #ifndef COMPILER_REGISTER_BUG | |
900 | register | |
901 | #endif /* COMPILER_REGISTER_BUG */ | |
902 | int vpos = SCREEN_CURSOR_Y (screen); | |
903 | ||
904 | /* Give up if about to continue line */ | |
905 | if (hpos - XFASTINT (w->left) + 1 + 1 >= XFASTINT (w->width) | |
906 | ||
907 | /* Avoid losing if cursor is in invisible text off left margin */ | |
908 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
909 | ||
910 | /* Give up if cursor outside window (in minibuf, probably) */ | |
911 | || SCREEN_CURSOR_Y (screen) < XFASTINT (w->top) | |
912 | || SCREEN_CURSOR_Y (screen) >= XFASTINT (w->top) + XFASTINT (w->height) | |
913 | ||
914 | /* Give up if cursor not really at SCREEN_CURSOR_X, SCREEN_CURSOR_Y */ | |
915 | || !display_completed | |
916 | ||
917 | /* Give up if buffer appears in two places. */ | |
918 | || buffer_shared > 1 | |
919 | ||
920 | /* Give up if w is minibuffer and a message is being displayed there */ | |
921 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
922 | return 0; | |
923 | ||
924 | current_screen->glyphs[vpos][hpos] = g; | |
925 | unchanged_modified = MODIFF; | |
926 | beg_unchanged = GPT - BEG; | |
927 | XFASTINT (w->last_point) = point; | |
928 | XFASTINT (w->last_point_x) = hpos; | |
929 | XFASTINT (w->last_modified) = MODIFF; | |
930 | ||
931 | reassert_line_highlight (0, vpos); | |
932 | write_glyphs (¤t_screen->glyphs[vpos][hpos], 1); | |
933 | fflush (stdout); | |
934 | ++SCREEN_CURSOR_X (screen); | |
935 | if (hpos == current_screen->used[vpos]) | |
936 | { | |
937 | current_screen->used[vpos] = hpos + 1; | |
938 | current_screen->glyphs[vpos][hpos + 1] = 0; | |
939 | } | |
940 | ||
941 | return 1; | |
942 | } | |
943 | ||
944 | int | |
945 | direct_output_forward_char (n) | |
946 | int n; | |
947 | { | |
948 | register SCREEN_PTR screen = selected_screen; | |
949 | register struct window *w = XWINDOW (selected_window); | |
950 | ||
951 | /* Avoid losing if cursor is in invisible text off left margin */ | |
952 | if (XINT (w->hscroll) && SCREEN_CURSOR_X (screen) == XFASTINT (w->left)) | |
953 | return 0; | |
954 | ||
955 | SCREEN_CURSOR_X (screen) += n; | |
956 | XFASTINT (w->last_point_x) = SCREEN_CURSOR_X (screen); | |
957 | XFASTINT (w->last_point) = point; | |
958 | cursor_to (SCREEN_CURSOR_Y (screen), SCREEN_CURSOR_X (screen)); | |
959 | fflush (stdout); | |
960 | return 1; | |
961 | } | |
962 | \f | |
963 | static void update_line (); | |
964 | ||
965 | /* Update screen S based on the data in SCREEN_DESIRED_GLYPHS. | |
966 | Value is nonzero if redisplay stopped due to pending input. | |
967 | FORCE nonzero means do not stop for pending input. */ | |
968 | ||
969 | int | |
970 | update_screen (s, force, inhibit_hairy_id) | |
971 | SCREEN_PTR s; | |
972 | int force; | |
973 | int inhibit_hairy_id; | |
974 | { | |
975 | register struct screen_glyphs *current_screen = SCREEN_CURRENT_GLYPHS (s); | |
976 | register struct screen_glyphs *desired_screen = SCREEN_DESIRED_GLYPHS (s); | |
977 | register int i; | |
978 | int pause; | |
979 | int preempt_count = baud_rate / 2400 + 1; | |
980 | extern input_pending; | |
981 | #ifdef HAVE_X_WINDOWS | |
982 | register int downto, leftmost; | |
983 | #endif | |
984 | ||
985 | if (SCREEN_HEIGHT (s) == 0) abort (); /* Some bug zeros some core */ | |
986 | ||
987 | detect_input_pending (); | |
988 | if (input_pending && !force) | |
989 | { | |
990 | pause = 1; | |
991 | goto do_pause; | |
992 | } | |
993 | ||
994 | update_begin (s); | |
995 | ||
996 | if (!line_ins_del_ok) | |
997 | inhibit_hairy_id = 1; | |
998 | ||
efb859b4 JB |
999 | /* See if any of the desired lines are enabled; don't compute for |
1000 | i/d line if just want cursor motion. */ | |
4588ec20 JB |
1001 | for (i = 0; i < SCREEN_HEIGHT (s); i++) |
1002 | if (desired_screen->enable[i]) | |
1003 | break; | |
1004 | ||
1005 | /* Try doing i/d line, if not yet inhibited. */ | |
1006 | if (!inhibit_hairy_id && i < SCREEN_HEIGHT (s)) | |
1007 | force |= scrolling (s); | |
1008 | ||
1009 | /* Update the individual lines as needed. Do bottom line first. */ | |
1010 | ||
1011 | if (desired_screen->enable[SCREEN_HEIGHT (s) - 1]) | |
1012 | update_line (s, SCREEN_HEIGHT (s) - 1); | |
1013 | ||
1014 | #ifdef HAVE_X_WINDOWS | |
1015 | if (SCREEN_IS_X (s)) | |
1016 | { | |
1017 | leftmost = downto = s->display.x->internal_border_width; | |
1018 | if (desired_screen->enable[0]) | |
1019 | { | |
1020 | current_screen->top_left_x[SCREEN_HEIGHT (s) - 1] = leftmost; | |
1021 | current_screen->top_left_y[SCREEN_HEIGHT (s) - 1] | |
1022 | = PIXEL_HEIGHT (s) - s->display.x->internal_border_width | |
1023 | - LINE_HEIGHT(s, SCREEN_HEIGHT (s) - 1); | |
1024 | current_screen->top_left_x[0] = leftmost; | |
1025 | current_screen->top_left_y[0] = downto; | |
1026 | } | |
1027 | } | |
1028 | #endif /* HAVE_X_WINDOWS */ | |
1029 | ||
1030 | /* Now update the rest of the lines. */ | |
1031 | for (i = 0; i < SCREEN_HEIGHT (s) - 1 && (force || !input_pending); i++) | |
1032 | { | |
1033 | if (desired_screen->enable[i]) | |
1034 | { | |
1035 | if (SCREEN_IS_TERMCAP (s)) | |
1036 | { | |
1037 | /* Flush out every so many lines. | |
1038 | Also flush out if likely to have more than 1k buffered | |
1039 | otherwise. I'm told that some telnet connections get | |
1040 | really screwed by more than 1k output at once. */ | |
1041 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1042 | if (outq > 900 | |
1043 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1044 | { | |
1045 | fflush (stdout); | |
1046 | if (preempt_count == 1) | |
1047 | { | |
1048 | #ifdef TIOCOUTQ | |
1049 | if (ioctl (0, TIOCOUTQ, &outq) < 0) | |
1050 | /* Probably not a tty. Ignore the error and reset | |
1051 | * the outq count. */ | |
1052 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1053 | #endif | |
1054 | outq *= 10; | |
1055 | sleep (outq / baud_rate); | |
1056 | } | |
1057 | } | |
1058 | if ((i - 1) % preempt_count == 0) | |
1059 | detect_input_pending (); | |
1060 | } | |
1061 | ||
1062 | update_line (s, i); | |
1063 | #ifdef HAVE_X_WINDOWS | |
1064 | if (SCREEN_IS_X (s)) | |
1065 | { | |
1066 | current_screen->top_left_y[i] = downto; | |
1067 | current_screen->top_left_x[i] = leftmost; | |
1068 | } | |
1069 | #endif /* HAVE_X_WINDOWS */ | |
1070 | } | |
1071 | ||
1072 | if (SCREEN_IS_X (s)) | |
1073 | downto += LINE_HEIGHT(s, i); | |
1074 | } | |
1075 | pause = (i < SCREEN_HEIGHT (s) - 1) ? i : 0; | |
1076 | ||
1077 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1078 | if (!pause) | |
1079 | { | |
1080 | ||
1081 | if (s == selected_screen && cursor_in_echo_area < 0) | |
1082 | cursor_to (SCREEN_HEIGHT (s) - 1, 0); | |
1083 | else if (s == selected_screen && cursor_in_echo_area | |
1084 | && !desired_screen->used[SCREEN_HEIGHT (s) - 1]) | |
1085 | cursor_to (SCREEN_HEIGHT (s), 0); | |
1086 | else if (cursor_in_echo_area) | |
1087 | cursor_to (SCREEN_HEIGHT (s) - 1, | |
1088 | min (SCREEN_WIDTH (s) - 1, | |
1089 | desired_screen->used[SCREEN_HEIGHT (s) - 1])); | |
1090 | else | |
1091 | cursor_to (SCREEN_CURSOR_Y (s), max (min (SCREEN_CURSOR_X (s), | |
1092 | SCREEN_WIDTH (s) - 1), 0)); | |
1093 | } | |
1094 | ||
1095 | update_end (s); | |
1096 | ||
1097 | if (termscript) | |
1098 | fflush (termscript); | |
1099 | fflush (stdout); | |
1100 | ||
1101 | /* Here if output is preempted because input is detected. */ | |
1102 | do_pause: | |
1103 | ||
1104 | if (SCREEN_HEIGHT (s) == 0) abort (); /* Some bug zeros some core */ | |
1105 | display_completed = !pause; | |
1106 | ||
1107 | bzero (desired_screen->enable, SCREEN_HEIGHT (s)); | |
1108 | return pause; | |
1109 | } | |
1110 | ||
1111 | /* Called when about to quit, to check for doing so | |
1112 | at an improper time. */ | |
1113 | ||
1114 | void | |
1115 | quit_error_check () | |
1116 | { | |
1117 | if (SCREEN_DESIRED_GLYPHS (selected_screen) == 0) | |
1118 | return; | |
1119 | if (SCREEN_DESIRED_GLYPHS (selected_screen)->enable[0]) | |
1120 | abort (); | |
1121 | if (SCREEN_DESIRED_GLYPHS (selected_screen)->enable[SCREEN_HEIGHT (selected_screen) - 1]) | |
1122 | abort (); | |
1123 | } | |
1124 | \f | |
1125 | /* Decide what insert/delete line to do, and do it */ | |
1126 | ||
1127 | extern void scrolling_1 (); | |
1128 | ||
1129 | scrolling (screen) | |
1130 | SCREEN_PTR screen; | |
1131 | { | |
1132 | int unchanged_at_top, unchanged_at_bottom; | |
1133 | int window_size; | |
1134 | int changed_lines; | |
1135 | int *old_hash = (int *) alloca (SCREEN_HEIGHT (screen) * sizeof (int)); | |
1136 | int *new_hash = (int *) alloca (SCREEN_HEIGHT (screen) * sizeof (int)); | |
1137 | int *draw_cost = (int *) alloca (SCREEN_HEIGHT (screen) * sizeof (int)); | |
1138 | register int i; | |
1139 | int free_at_end_vpos = SCREEN_HEIGHT (screen); | |
1140 | register struct screen_glyphs *current_screen = SCREEN_CURRENT_GLYPHS (screen); | |
1141 | register struct screen_glyphs *desired_screen = SCREEN_DESIRED_GLYPHS (screen); | |
1142 | ||
1143 | /* Compute hash codes of all the lines. | |
1144 | Also calculate number of changed lines, | |
1145 | number of unchanged lines at the beginning, | |
1146 | and number of unchanged lines at the end. */ | |
1147 | ||
1148 | changed_lines = 0; | |
1149 | unchanged_at_top = 0; | |
1150 | unchanged_at_bottom = SCREEN_HEIGHT (screen); | |
1151 | for (i = 0; i < SCREEN_HEIGHT (screen); i++) | |
1152 | { | |
1153 | /* Give up on this scrolling if some old lines are not enabled. */ | |
1154 | if (!current_screen->enable[i]) | |
1155 | return 0; | |
1156 | old_hash[i] = line_hash_code (current_screen, i); | |
1157 | if (! desired_screen->enable[i]) | |
1158 | new_hash[i] = old_hash[i]; | |
1159 | else | |
1160 | new_hash[i] = line_hash_code (desired_screen, i); | |
1161 | ||
1162 | if (old_hash[i] != new_hash[i]) | |
1163 | { | |
1164 | changed_lines++; | |
1165 | unchanged_at_bottom = SCREEN_HEIGHT (screen) - i - 1; | |
1166 | } | |
1167 | else if (i == unchanged_at_top) | |
1168 | unchanged_at_top++; | |
1169 | draw_cost[i] = line_draw_cost (desired_screen, i); | |
1170 | } | |
1171 | ||
1172 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1173 | if (changed_lines < baud_rate / 2400 | |
1174 | || unchanged_at_bottom == SCREEN_HEIGHT (screen)) | |
1175 | return 1; | |
1176 | ||
1177 | window_size = (SCREEN_HEIGHT (screen) - unchanged_at_top | |
1178 | - unchanged_at_bottom); | |
1179 | ||
1180 | if (scroll_region_ok) | |
1181 | free_at_end_vpos -= unchanged_at_bottom; | |
1182 | else if (memory_below_screen) | |
1183 | free_at_end_vpos = -1; | |
1184 | ||
1185 | /* If large window, fast terminal and few lines in common between | |
1186 | current screen and desired screen, don't bother with i/d calc. */ | |
1187 | if (window_size >= 18 && baud_rate > 2400 | |
1188 | && (window_size >= | |
1189 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
1190 | SCREEN_HEIGHT (screen) - unchanged_at_bottom, | |
1191 | old_hash, new_hash, draw_cost))) | |
1192 | return 0; | |
1193 | ||
1194 | scrolling_1 (screen, window_size, unchanged_at_top, unchanged_at_bottom, | |
1195 | draw_cost + unchanged_at_top - 1, | |
1196 | old_hash + unchanged_at_top - 1, | |
1197 | new_hash + unchanged_at_top - 1, | |
1198 | free_at_end_vpos - unchanged_at_top); | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | \f | |
1203 | /* Return the offset in its buffer of the character at location col, line | |
1204 | in the given window. */ | |
1205 | int | |
1206 | buffer_posn_from_coords (window, col, line) | |
1207 | struct window *window; | |
1208 | int col, line; | |
1209 | { | |
1210 | int window_left = XFASTINT (window->left); | |
1211 | ||
1212 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1213 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1214 | window. */ | |
4588ec20 JB |
1215 | int window_width = (XFASTINT (window->width) - 1 |
1216 | - (XFASTINT (window->width) + window_left | |
1217 | != SCREEN_WIDTH (XSCREEN (window->screen)))); | |
1218 | ||
efb859b4 | 1219 | int startp = marker_position (window->start); |
4588ec20 JB |
1220 | |
1221 | /* Since compute_motion will only operate on the current buffer, | |
1222 | we need to save the old one and restore it when we're done. */ | |
1223 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1224 | struct position *posn; |
4588ec20 JB |
1225 | |
1226 | current_buffer = XBUFFER (window->buffer); | |
1227 | ||
efb859b4 JB |
1228 | /* It would be nice if we could use SCREEN_CURRENT_GLYPHS (XSCREEN |
1229 | (window->screen))->bufp to avoid scanning from the very top of | |
1230 | the window, but it isn't maintained correctly, and I'm not even | |
1231 | sure I will keep it. */ | |
1232 | posn = compute_motion (startp, 0, | |
1233 | (window == XWINDOW (minibuf_window) && startp == 1 | |
1234 | ? minibuf_prompt_width : 0), | |
1235 | ZV, line, col - window_left, | |
1236 | window_width, XINT (window->hscroll), 0); | |
4588ec20 JB |
1237 | |
1238 | current_buffer = old_current_buffer; | |
1239 | ||
efb859b4 JB |
1240 | /* compute_motion considers screen points past the end of a line |
1241 | to be *after* the newline, i.e. at the start of the next line. | |
1242 | This is reasonable, but not really what we want. So if the | |
1243 | result is on a line below LINE, back it up one character. */ | |
1244 | if (posn->vpos > line) | |
1245 | return posn->bufpos - 1; | |
1246 | else | |
1247 | return posn->bufpos; | |
4588ec20 JB |
1248 | } |
1249 | \f | |
1250 | static int | |
1251 | count_blanks (r) | |
1252 | register GLYPH *r; | |
1253 | { | |
1254 | register GLYPH *p = r; | |
1255 | while (*r++ == SPACEGLYPH); | |
1256 | return r - p - 1; | |
1257 | } | |
1258 | ||
1259 | static int | |
1260 | count_match (str1, str2) | |
1261 | GLYPH *str1, *str2; | |
1262 | { | |
1263 | register GLYPH *p1 = str1; | |
1264 | register GLYPH *p2 = str2; | |
1265 | while (*p1++ == *p2++); | |
1266 | return p1 - str1 - 1; | |
1267 | } | |
1268 | ||
1269 | /* Char insertion/deletion cost vector, from term.c */ | |
1270 | extern int *char_ins_del_vector; | |
1271 | ||
1272 | #define char_ins_del_cost(s) (&char_ins_del_vector[SCREEN_HEIGHT((s))]) | |
1273 | ||
1274 | static void | |
1275 | update_line (screen, vpos) | |
1276 | register SCREEN_PTR screen; | |
1277 | int vpos; | |
1278 | { | |
1279 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1280 | int tem; | |
1281 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1282 | int save; | |
1283 | register struct screen_glyphs *current_screen | |
1284 | = SCREEN_CURRENT_GLYPHS (screen); | |
1285 | register struct screen_glyphs *desired_screen | |
1286 | = SCREEN_DESIRED_GLYPHS (screen); | |
1287 | ||
1288 | if (desired_screen->highlight[vpos] | |
1289 | != (current_screen->enable[vpos] && current_screen->highlight[vpos])) | |
1290 | { | |
1291 | change_line_highlight (desired_screen->highlight[vpos], vpos, | |
1292 | (current_screen->enable[vpos] ? | |
1293 | current_screen->used[vpos] : 0)); | |
1294 | current_screen->enable[vpos] = 0; | |
1295 | } | |
1296 | else | |
1297 | reassert_line_highlight (desired_screen->highlight[vpos], vpos); | |
1298 | ||
1299 | if (! current_screen->enable[vpos]) | |
1300 | { | |
1301 | olen = 0; | |
1302 | } | |
1303 | else | |
1304 | { | |
1305 | obody = current_screen->glyphs[vpos]; | |
1306 | olen = current_screen->used[vpos]; | |
1307 | if (! current_screen->highlight[vpos]) | |
1308 | { | |
1309 | if (!must_write_spaces) | |
1310 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1311 | olen--; | |
1312 | } | |
1313 | else | |
1314 | { | |
1315 | /* For an inverse-video line, remember we gave it | |
1316 | spaces all the way to the screen edge | |
1317 | so that the reverse video extends all the way across. */ | |
1318 | ||
1319 | while (olen < SCREEN_WIDTH (screen) - 1) | |
1320 | obody[olen++] = SPACEGLYPH; | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | /* One way or another, this will enable the line being updated. */ | |
1325 | current_screen->enable[vpos] = 1; | |
1326 | current_screen->used[vpos] = desired_screen->used[vpos]; | |
1327 | current_screen->highlight[vpos] = desired_screen->highlight[vpos]; | |
1328 | current_screen->bufp[vpos] = desired_screen->bufp[vpos]; | |
1329 | ||
1330 | #ifdef HAVE_X_WINDOWS | |
1331 | if (SCREEN_IS_X (screen)) | |
1332 | { | |
1333 | current_screen->pix_width[vpos] | |
1334 | = current_screen->used[vpos] | |
1335 | * FONT_WIDTH (screen->display.x->font); | |
1336 | current_screen->pix_height[vpos] | |
1337 | = FONT_HEIGHT (screen->display.x->font); | |
1338 | } | |
1339 | #endif /* HAVE_X_WINDOWS */ | |
1340 | ||
1341 | if (!desired_screen->enable[vpos]) | |
1342 | { | |
1343 | nlen = 0; | |
1344 | goto just_erase; | |
1345 | } | |
1346 | ||
1347 | nbody = desired_screen->glyphs[vpos]; | |
1348 | nlen = desired_screen->used[vpos]; | |
1349 | ||
1350 | /* Pretend trailing spaces are not there at all, | |
1351 | unless for one reason or another we must write all spaces. */ | |
1352 | if (! desired_screen->highlight[vpos]) | |
1353 | { | |
1354 | if (!must_write_spaces) | |
1355 | /* We know that the previous character byte contains 0. */ | |
1356 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1357 | nlen--; | |
1358 | } | |
1359 | else | |
1360 | { | |
1361 | /* For an inverse-video line, give it extra trailing spaces | |
1362 | all the way to the screen edge | |
1363 | so that the reverse video extends all the way across. */ | |
1364 | ||
1365 | while (nlen < SCREEN_WIDTH (screen) - 1) | |
1366 | nbody[nlen++] = SPACEGLYPH; | |
1367 | } | |
1368 | ||
1369 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1370 | if (!char_ins_del_ok) | |
1371 | { | |
1372 | int i,j; | |
1373 | ||
1374 | for (i = 0; i < nlen; i++) | |
1375 | { | |
1376 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1377 | { | |
1378 | cursor_to (vpos, i); | |
1379 | for (j = 1; (i + j < nlen && | |
1380 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1381 | j++); | |
1382 | ||
1383 | /* Output this run of non-matching chars. */ | |
1384 | write_glyphs (nbody + i, j); | |
1385 | i += j - 1; | |
1386 | ||
1387 | /* Now find the next non-match. */ | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1392 | if (olen > nlen) | |
1393 | { | |
1394 | cursor_to (vpos, nlen); | |
1395 | clear_end_of_line (olen); | |
1396 | } | |
1397 | ||
1398 | /* Exchange contents between current_screen and new_screen. */ | |
1399 | temp = desired_screen->glyphs[vpos]; | |
1400 | desired_screen->glyphs[vpos] = current_screen->glyphs[vpos]; | |
1401 | current_screen->glyphs[vpos] = temp; | |
1402 | ||
1403 | return; | |
1404 | } | |
1405 | ||
1406 | if (!olen) | |
1407 | { | |
1408 | nsp = (must_write_spaces || desired_screen->highlight[vpos]) | |
1409 | ? 0 : count_blanks (nbody); | |
1410 | if (nlen > nsp) | |
1411 | { | |
1412 | cursor_to (vpos, nsp); | |
1413 | write_glyphs (nbody + nsp, nlen - nsp); | |
1414 | } | |
1415 | ||
1416 | /* Exchange contents between current_screen and new_screen. */ | |
1417 | temp = desired_screen->glyphs[vpos]; | |
1418 | desired_screen->glyphs[vpos] = current_screen->glyphs[vpos]; | |
1419 | current_screen->glyphs[vpos] = temp; | |
1420 | ||
1421 | return; | |
1422 | } | |
1423 | ||
1424 | obody[olen] = 1; | |
1425 | save = nbody[nlen]; | |
1426 | nbody[nlen] = 0; | |
1427 | ||
1428 | /* Compute number of leading blanks in old and new contents. */ | |
1429 | osp = count_blanks (obody); | |
1430 | if (!desired_screen->highlight[vpos]) | |
1431 | nsp = count_blanks (nbody); | |
1432 | else | |
1433 | nsp = 0; | |
1434 | ||
1435 | /* Compute number of matching chars starting with first nonblank. */ | |
1436 | begmatch = count_match (obody + osp, nbody + nsp); | |
1437 | ||
1438 | /* Spaces in new match implicit space past the end of old. */ | |
1439 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1440 | if (!must_write_spaces && osp + begmatch == olen) | |
1441 | { | |
1442 | np1 = nbody + nsp; | |
1443 | while (np1[begmatch] == SPACEGLYPH) | |
1444 | begmatch++; | |
1445 | } | |
1446 | ||
1447 | /* Avoid doing insert/delete char | |
1448 | just cause number of leading spaces differs | |
1449 | when the following text does not match. */ | |
1450 | if (begmatch == 0 && osp != nsp) | |
1451 | osp = nsp = min (osp, nsp); | |
1452 | ||
1453 | /* Find matching characters at end of line */ | |
1454 | op1 = obody + olen; | |
1455 | np1 = nbody + nlen; | |
1456 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1457 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1458 | { | |
1459 | op1--; | |
1460 | np1--; | |
1461 | } | |
1462 | endmatch = obody + olen - op1; | |
1463 | ||
1464 | /* Put correct value back in nbody[nlen]. | |
1465 | This is important because direct_output_for_insert | |
1466 | can write into the line at a later point. | |
1467 | If this screws up the zero at the end of the line, re-establish it. */ | |
1468 | nbody[nlen] = save; | |
1469 | obody[olen] = 0; | |
1470 | ||
1471 | /* tem gets the distance to insert or delete. | |
1472 | endmatch is how many characters we save by doing so. | |
1473 | Is it worth it? */ | |
1474 | ||
1475 | tem = (nlen - nsp) - (olen - osp); | |
1476 | if (endmatch && tem | |
1477 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (screen)[tem])) | |
1478 | endmatch = 0; | |
1479 | ||
1480 | /* nsp - osp is the distance to insert or delete. | |
1481 | If that is nonzero, begmatch is known to be nonzero also. | |
1482 | begmatch + endmatch is how much we save by doing the ins/del. | |
1483 | Is it worth it? */ | |
1484 | ||
1485 | if (nsp != osp | |
1486 | && (!char_ins_del_ok | |
1487 | || begmatch + endmatch <= char_ins_del_cost (screen)[nsp - osp])) | |
1488 | { | |
1489 | begmatch = 0; | |
1490 | endmatch = 0; | |
1491 | osp = nsp = min (osp, nsp); | |
1492 | } | |
1493 | ||
1494 | /* Now go through the line, inserting, writing and | |
1495 | deleting as appropriate. */ | |
1496 | ||
1497 | if (osp > nsp) | |
1498 | { | |
1499 | cursor_to (vpos, nsp); | |
1500 | delete_glyphs (osp - nsp); | |
1501 | } | |
1502 | else if (nsp > osp) | |
1503 | { | |
1504 | /* If going to delete chars later in line | |
1505 | and insert earlier in the line, | |
1506 | must delete first to avoid losing data in the insert */ | |
1507 | if (endmatch && nlen < olen + nsp - osp) | |
1508 | { | |
1509 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1510 | delete_glyphs (olen + nsp - osp - nlen); | |
1511 | olen = nlen - (nsp - osp); | |
1512 | } | |
1513 | cursor_to (vpos, osp); | |
1514 | insert_glyphs ((char *)0, nsp - osp); | |
1515 | } | |
1516 | olen += nsp - osp; | |
1517 | ||
1518 | tem = nsp + begmatch + endmatch; | |
1519 | if (nlen != tem || olen != tem) | |
1520 | { | |
1521 | cursor_to (vpos, nsp + begmatch); | |
1522 | if (!endmatch || nlen == olen) | |
1523 | { | |
1524 | /* If new text being written reaches right margin, | |
1525 | there is no need to do clear-to-eol at the end. | |
1526 | (and it would not be safe, since cursor is not | |
1527 | going to be "at the margin" after the text is done) */ | |
1528 | if (nlen == SCREEN_WIDTH (screen)) | |
1529 | olen = 0; | |
1530 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1531 | ||
1532 | #ifdef obsolete | |
1533 | ||
1534 | /* the following code loses disastrously if tem == nlen. | |
1535 | Rather than trying to fix that case, I am trying the simpler | |
1536 | solution found above. */ | |
1537 | ||
1538 | /* If the text reaches to the right margin, | |
1539 | it will lose one way or another (depending on AutoWrap) | |
1540 | to clear to end of line after outputting all the text. | |
1541 | So pause with one character to go and clear the line then. */ | |
1542 | if (nlen == SCREEN_WIDTH (screen) && fast_clear_end_of_line && olen > nlen) | |
1543 | { | |
1544 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1545 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1546 | clear_end_of_line (olen); | |
1547 | olen = 0; /* Don't let it be cleared again later */ | |
1548 | write_glyphs (nbody + nlen - 1, 1); | |
1549 | } | |
1550 | else | |
1551 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1552 | #endif /* OBSOLETE */ | |
1553 | ||
1554 | } | |
1555 | else if (nlen > olen) | |
1556 | { | |
1557 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1558 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1559 | olen = nlen; | |
1560 | } | |
1561 | else if (olen > nlen) | |
1562 | { | |
1563 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1564 | delete_glyphs (olen - nlen); | |
1565 | olen = nlen; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | just_erase: | |
1570 | /* If any unerased characters remain after the new line, erase them. */ | |
1571 | if (olen > nlen) | |
1572 | { | |
1573 | cursor_to (vpos, nlen); | |
1574 | clear_end_of_line (olen); | |
1575 | } | |
1576 | ||
1577 | /* Exchange contents between current_screen and new_screen. */ | |
1578 | temp = desired_screen->glyphs[vpos]; | |
1579 | desired_screen->glyphs[vpos] = current_screen->glyphs[vpos]; | |
1580 | current_screen->glyphs[vpos] = temp; | |
1581 | } | |
1582 | \f | |
1583 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1584 | 1, 1, "FOpen termscript file: ", | |
1585 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1586 | FILE = nil means just close any termscript file currently open.") | |
1587 | (file) | |
1588 | Lisp_Object file; | |
1589 | { | |
1590 | if (termscript != 0) fclose (termscript); | |
1591 | termscript = 0; | |
1592 | ||
efb859b4 | 1593 | if (! NILP (file)) |
4588ec20 JB |
1594 | { |
1595 | file = Fexpand_file_name (file, Qnil); | |
1596 | termscript = fopen (XSTRING (file)->data, "w"); | |
1597 | if (termscript == 0) | |
1598 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1599 | } | |
1600 | return Qnil; | |
1601 | } | |
1602 | \f | |
1603 | ||
1604 | #ifdef SIGWINCH | |
efb859b4 | 1605 | SIGTYPE |
4588ec20 JB |
1606 | window_change_signal () |
1607 | { | |
1608 | int width, height; | |
1609 | extern int errno; | |
1610 | int old_errno = errno; | |
1611 | ||
1612 | get_screen_size (&width, &height); | |
1613 | ||
1614 | /* The screen size change obviously applies to a termcap-controlled | |
1615 | screen. Find such a screen in the list, and assume it's the only | |
1616 | one (since the redisplay code always writes to stdout, not a | |
1617 | FILE * specified in the screen structure). Record the new size, | |
1618 | but don't reallocate the data structures now. Let that be done | |
1619 | later outside of the signal handler. */ | |
1620 | ||
1621 | { | |
1622 | Lisp_Object tail; | |
1623 | ||
1624 | for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
1625 | { | |
1626 | SCREEN_PTR s = XSCREEN (XCONS (tail)->car); | |
1627 | ||
efb859b4 | 1628 | if (SCREEN_IS_TERMCAP (s)) |
4588ec20 JB |
1629 | { |
1630 | ++in_display; | |
1631 | change_screen_size (s, height, width, 0); | |
1632 | --in_display; | |
1633 | break; | |
1634 | } | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | signal (SIGWINCH, window_change_signal); | |
1639 | errno = old_errno; | |
1640 | } | |
1641 | #endif /* SIGWINCH */ | |
1642 | ||
1643 | ||
1644 | /* Do any change in screen size that was requested by a signal. */ | |
1645 | ||
1646 | do_pending_window_change () | |
1647 | { | |
1648 | /* If window_change_signal should have run before, run it now. */ | |
1649 | while (delayed_size_change) | |
1650 | { | |
1651 | Lisp_Object tail; | |
1652 | ||
1653 | delayed_size_change = 0; | |
1654 | ||
1655 | for (tail = Vscreen_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
1656 | { | |
1657 | SCREEN_PTR s = XSCREEN (XCONS (tail)->car); | |
1658 | int height = SCREEN_NEW_HEIGHT (s); | |
1659 | int width = SCREEN_NEW_WIDTH (s); | |
1660 | ||
1661 | SCREEN_NEW_HEIGHT (s) = 0; | |
1662 | SCREEN_NEW_WIDTH (s) = 0; | |
1663 | ||
1664 | if (height != 0) | |
1665 | change_screen_size (s, height, width, 0); | |
1666 | } | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | ||
1671 | /* Change the screen height and/or width. Values may be given as zero to | |
1672 | indicate no change is to take place. */ | |
1673 | ||
1674 | change_screen_size (screen, newlength, newwidth, pretend) | |
1675 | register SCREEN_PTR screen; | |
1676 | register int newlength, newwidth, pretend; | |
1677 | { | |
1678 | /* If we can't deal with the change now, queue it for later. */ | |
1679 | if (in_display) | |
1680 | { | |
1681 | SCREEN_NEW_HEIGHT (screen) = newlength; | |
1682 | SCREEN_NEW_WIDTH (screen) = newwidth; | |
1683 | delayed_size_change = 1; | |
1684 | return; | |
1685 | } | |
1686 | ||
1687 | /* This size-change overrides any pending one for this screen. */ | |
1688 | SCREEN_NEW_HEIGHT (screen) = 0; | |
1689 | SCREEN_NEW_WIDTH (screen) = 0; | |
1690 | ||
1691 | if ((newlength == 0 || newlength == SCREEN_HEIGHT (screen)) | |
1692 | && (newwidth == 0 || newwidth == SCREEN_WIDTH (screen))) | |
1693 | return; | |
1694 | ||
1695 | if (newlength && newlength != SCREEN_HEIGHT (screen)) | |
1696 | { | |
efb859b4 JB |
1697 | if (SCREEN_HAS_MINIBUF (screen) |
1698 | && ! SCREEN_MINIBUF_ONLY_P (screen)) | |
4588ec20 JB |
1699 | { |
1700 | /* Screen has both root and minibuffer. */ | |
1701 | set_window_height (SCREEN_ROOT_WINDOW (screen), | |
1702 | newlength - 1, 0); | |
1703 | XFASTINT (XWINDOW (SCREEN_MINIBUF_WINDOW (screen))->top) | |
1704 | = newlength - 1; | |
1705 | set_window_height (SCREEN_MINIBUF_WINDOW (screen), 1, 0); | |
1706 | } | |
1707 | else | |
1708 | /* Screen has just one top-level window. */ | |
1709 | set_window_height (SCREEN_ROOT_WINDOW (screen), newlength, 0); | |
1710 | ||
efb859b4 | 1711 | if (SCREEN_IS_TERMCAP (screen) && !pretend) |
4588ec20 JB |
1712 | ScreenRows = newlength; |
1713 | ||
1714 | #if 0 | |
1715 | if (screen->output_method == output_termcap) | |
1716 | { | |
1717 | screen_height = newlength; | |
1718 | if (!pretend) | |
1719 | ScreenRows = newlength; | |
1720 | } | |
1721 | #endif | |
1722 | } | |
1723 | ||
1724 | if (newwidth && newwidth != SCREEN_WIDTH (screen)) | |
1725 | { | |
1726 | set_window_width (SCREEN_ROOT_WINDOW (screen), newwidth, 0); | |
efb859b4 | 1727 | if (SCREEN_HAS_MINIBUF (screen)) |
4588ec20 JB |
1728 | set_window_width (SCREEN_MINIBUF_WINDOW (screen), newwidth, 0); |
1729 | SCREEN_WIDTH (screen) = newwidth; | |
1730 | ||
1731 | if (SCREEN_IS_TERMCAP (screen) && !pretend) | |
1732 | ScreenCols = newwidth; | |
1733 | #if 0 | |
1734 | if (screen->output_method == output_termcap) | |
1735 | { | |
1736 | screen_width = newwidth; | |
1737 | if (!pretend) | |
1738 | ScreenCols = newwidth; | |
1739 | } | |
1740 | #endif | |
1741 | } | |
1742 | ||
1743 | if (newlength) | |
1744 | SCREEN_HEIGHT (screen) = newlength; | |
1745 | ||
1746 | remake_screen_glyphs (screen); | |
1747 | calculate_costs (screen); | |
1748 | } | |
1749 | \f | |
1750 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1751 | Ssend_string_to_terminal, 1, 1, 0, | |
1752 | "Send STRING to the terminal without alteration.\n\ | |
1753 | Control characters in STRING will have terminal-dependent effects.") | |
1754 | (str) | |
1755 | Lisp_Object str; | |
1756 | { | |
1757 | CHECK_STRING (str, 0); | |
1758 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1759 | fflush (stdout); | |
1760 | if (termscript) | |
1761 | { | |
1762 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1763 | fflush (termscript); | |
1764 | } | |
1765 | return Qnil; | |
1766 | } | |
1767 | ||
1768 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1769 | "Beep, or flash the screen.\n\ | |
1770 | Also, unless an argument is given,\n\ | |
1771 | terminate any keyboard macro currently executing.") | |
1772 | (arg) | |
1773 | Lisp_Object arg; | |
1774 | { | |
efb859b4 | 1775 | if (!NILP (arg)) |
4588ec20 JB |
1776 | { |
1777 | ring_bell (); | |
1778 | fflush (stdout); | |
1779 | } | |
1780 | else | |
1781 | bitch_at_user (); | |
1782 | ||
1783 | return Qnil; | |
1784 | } | |
1785 | ||
1786 | bitch_at_user () | |
1787 | { | |
1788 | if (noninteractive) | |
1789 | putchar (07); | |
1790 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1791 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1792 | else | |
1793 | ring_bell (); | |
1794 | fflush (stdout); | |
1795 | } | |
1796 | ||
1797 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
1798 | "Pause, without updating display, for ARG seconds.\n\ | |
1799 | Optional second arg non-nil means ARG is measured in milliseconds.\n\ | |
1800 | \(Not all operating systems support milliseconds.)") | |
1801 | (n, millisec) | |
1802 | Lisp_Object n, millisec; | |
1803 | { | |
1804 | #ifndef subprocesses | |
1805 | #ifdef HAVE_TIMEVAL | |
1806 | struct timeval timeout, end_time, garbage1; | |
1807 | #endif /* HAVE_TIMEVAL */ | |
1808 | #endif /* no subprocesses */ | |
1809 | int usec = 0; | |
1810 | int sec; | |
1811 | ||
1812 | CHECK_NUMBER (n, 0); | |
1813 | sec = XINT (n); | |
1814 | if (sec <= 0) | |
1815 | return Qnil; | |
1816 | ||
efb859b4 | 1817 | if (!NILP (millisec)) |
4588ec20 JB |
1818 | { |
1819 | #ifndef HAVE_TIMEVAL | |
1820 | error ("millisecond sit-for not supported on %s", SYSTEM_TYPE); | |
1821 | #else | |
1822 | usec = sec % 1000 * 1000; | |
1823 | sec /= 1000; | |
1824 | #endif | |
1825 | } | |
1826 | ||
1827 | #ifdef subprocesses | |
1828 | wait_reading_process_input (sec, usec, 0, 0); | |
1829 | #else /* No subprocesses */ | |
1830 | immediate_quit = 1; | |
1831 | QUIT; | |
1832 | ||
1833 | #ifdef VMS | |
1834 | sys_sleep (sec); | |
1835 | #else /* not VMS */ | |
1836 | /* The reason this is done this way | |
1837 | (rather than defined (H_S) && defined (H_T)) | |
1838 | is because the VMS preprocessor doesn't grok `defined' */ | |
1839 | #ifdef HAVE_SELECT | |
1840 | #ifdef HAVE_TIMEVAL | |
1841 | gettimeofday (&end_time, &garbage1); | |
1842 | end_time.tv_sec += sec; | |
1843 | end_time.tv_usec += usec; | |
1844 | if (end_time.tv_usec >= 1000000) | |
1845 | end_time.tv_sec++, end_time.tv_usec -= 1000000; | |
1846 | ||
1847 | while (1) | |
1848 | { | |
1849 | gettimeofday (&timeout, &garbage1); | |
1850 | timeout.tv_sec = end_time.tv_sec - timeout.tv_sec; | |
1851 | timeout.tv_usec = end_time.tv_usec - timeout.tv_usec; | |
1852 | if (timeout.tv_usec < 0) | |
1853 | timeout.tv_usec += 1000000, timeout.tv_sec--; | |
1854 | if (timeout.tv_sec < 0) | |
1855 | break; | |
1856 | if (!select (1, 0, 0, 0, &timeout)) | |
1857 | break; | |
1858 | } | |
1859 | #else /* not HAVE_TIMEVAL */ | |
1860 | /* Is it safe to quit out of `sleep'? I'm afraid to trust it. */ | |
1861 | sleep (sec); | |
1862 | #endif /* HAVE_TIMEVAL */ | |
1863 | #else /* not HAVE_SELECT */ | |
1864 | sleep (sec); | |
1865 | #endif /* HAVE_SELECT */ | |
1866 | #endif /* not VMS */ | |
1867 | ||
1868 | immediate_quit = 0; | |
1869 | #endif /* no subprocesses */ | |
1870 | ||
1871 | return Qnil; | |
1872 | } | |
1873 | ||
1874 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, | |
1875 | "Perform redisplay, then wait for ARG seconds or until input is available.\n\ | |
1876 | Optional second arg non-nil means ARG counts in milliseconds.\n\ | |
1877 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ | |
1878 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
1879 | if input is available before it starts.\n\ | |
1880 | Value is t if waited the full time with no input arriving.") | |
1881 | (n, millisec, nodisp) | |
1882 | Lisp_Object n, millisec, nodisp; | |
1883 | { | |
1884 | #ifndef subprocesses | |
1885 | #ifdef HAVE_TIMEVAL | |
1886 | struct timeval timeout; | |
1887 | #else | |
1888 | int timeout_sec; | |
1889 | #endif | |
1890 | int waitchannels; | |
1891 | #endif /* no subprocesses */ | |
1892 | int usec = 0; | |
1893 | int sec; | |
1894 | ||
1895 | CHECK_NUMBER (n, 0); | |
1896 | ||
1897 | if (detect_input_pending ()) | |
1898 | return Qnil; | |
1899 | ||
1900 | if (EQ (nodisp, Qnil)) | |
1901 | redisplay_preserve_echo_area (); | |
1902 | ||
1903 | sec = XINT (n); | |
1904 | if (sec <= 0) | |
1905 | return Qt; | |
1906 | ||
efb859b4 | 1907 | if (!NILP (millisec)) |
4588ec20 JB |
1908 | { |
1909 | #ifndef HAVE_TIMEVAL | |
1910 | error ("millisecond sleep-for not supported on %s", SYSTEM_TYPE); | |
1911 | #else | |
1912 | usec = sec % 1000 * 1000; | |
1913 | sec /= 1000; | |
1914 | #endif | |
1915 | } | |
1916 | ||
1917 | #ifdef subprocesses | |
1918 | #ifdef SIGIO | |
1919 | gobble_input (); | |
1920 | #endif /* SIGIO */ | |
1921 | wait_reading_process_input (sec, usec, 1, 1); | |
1922 | #else /* no subprocesses */ | |
1923 | immediate_quit = 1; | |
1924 | QUIT; | |
1925 | ||
1926 | waitchannels = 1; | |
1927 | #ifdef VMS | |
1928 | input_wait_timeout (XINT (n)); | |
1929 | #else /* not VMS */ | |
1930 | #ifndef HAVE_TIMEVAL | |
1931 | timeout_sec = sec; | |
1932 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
1933 | #else /* HAVE_TIMEVAL */ | |
1934 | timeout.tv_sec = sec; | |
1935 | timeout.tv_usec = usec; | |
1936 | select (1, &waitchannels, 0, 0, &timeout); | |
1937 | #endif /* HAVE_TIMEVAL */ | |
1938 | #endif /* not VMS */ | |
1939 | ||
1940 | immediate_quit = 0; | |
1941 | #endif /* no subprocesses */ | |
1942 | ||
1943 | return detect_input_pending () ? Qnil : Qt; | |
1944 | } | |
1945 | ||
1946 | DEFUN ("sleep-for-millisecs", Fsleep_for_millisecs, Ssleep_for_millisecs, | |
1947 | 1, 1, 0, | |
1948 | "Pause, without updating display, for ARG milliseconds.") | |
1949 | (n) | |
1950 | Lisp_Object n; | |
1951 | { | |
1952 | #ifndef HAVE_TIMEVAL | |
1953 | error ("sleep-for-millisecs not supported on %s", SYSTEM_TYPE); | |
1954 | #else | |
1955 | CHECK_NUMBER (n, 0); | |
1956 | wait_reading_process_input (XINT (n) / 1000, XINT (n) % 1000 * 1000, | |
1957 | 0, 0); | |
1958 | return Qnil; | |
1959 | #endif /* HAVE_TIMEVAL */ | |
1960 | } | |
1961 | \f | |
1962 | char *terminal_type; | |
1963 | ||
1964 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
1965 | /* Determine terminal type and set terminal_driver */ | |
1966 | /* Then invoke its decoding routine to set up variables | |
1967 | in the terminal package */ | |
1968 | ||
1969 | init_display () | |
1970 | { | |
1971 | #ifdef HAVE_X_WINDOWS | |
1972 | extern int display_arg; | |
1973 | #endif | |
1974 | ||
1975 | meta_key = 0; | |
1976 | inverse_video = 0; | |
1977 | cursor_in_echo_area = 0; | |
1978 | terminal_type = (char *) 0; | |
1979 | ||
1980 | /* If the DISPLAY environment variable is set, try to use X, and | |
1981 | die with an error message if that doesn't work. */ | |
1982 | ||
1983 | /* Check if we're using a window system here before trying to | |
1984 | initialize the terminal. If we check the terminal first, | |
1985 | ||
1986 | If someone has indicated that they want | |
1987 | to use a window system, we shouldn't bother initializing the | |
1988 | terminal. This is especially important when the terminal is so | |
1989 | dumb that emacs gives up before and doesn't bother using the window | |
1990 | system. */ | |
1991 | ||
1992 | #ifdef HAVE_X_WINDOWS | |
efb859b4 | 1993 | if (!inhibit_window_system && (display_arg || getenv ("DISPLAY"))) |
4588ec20 JB |
1994 | { |
1995 | Vwindow_system = intern ("x"); | |
1996 | #ifdef HAVE_X11 | |
1997 | Vwindow_system_version = make_number (11); | |
1998 | #else | |
1999 | Vwindow_system_version = make_number (10); | |
2000 | #endif | |
2001 | return; | |
2002 | } | |
2003 | #endif /* HAVE_X_WINDOWS */ | |
2004 | ||
2005 | /* If no window system has been specified, try to use the terminal. */ | |
2006 | if (! isatty (0)) | |
2007 | { | |
2008 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2009 | exit (1); | |
2010 | } | |
2011 | ||
2012 | /* Look at the TERM variable */ | |
2013 | terminal_type = (char *) getenv ("TERM"); | |
2014 | if (!terminal_type) | |
2015 | { | |
2016 | #ifdef VMS | |
2017 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2018 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2019 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2020 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2021 | #else | |
2022 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2023 | #endif | |
2024 | exit (1); | |
2025 | } | |
2026 | ||
2027 | #ifdef VMS | |
2028 | /* VMS DCL tends to upcase things, so downcase term type. | |
2029 | Hardly any uppercase letters in terminal types; should be none. */ | |
2030 | { | |
2031 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2032 | char *p; | |
2033 | ||
2034 | strcpy (new, terminal_type); | |
2035 | ||
2036 | for (p = new; *p; p++) | |
2037 | if (isupper (*p)) | |
2038 | *p = tolower (*p); | |
2039 | ||
2040 | terminal_type = new; | |
2041 | } | |
2042 | #endif | |
2043 | ||
2044 | term_init (terminal_type); | |
2045 | ||
2046 | remake_screen_glyphs (selected_screen); | |
2047 | calculate_costs (selected_screen); | |
2048 | ||
2049 | /* X and Y coordinates of the cursor between updates. */ | |
2050 | SCREEN_CURSOR_X (selected_screen) = 0; | |
2051 | SCREEN_CURSOR_Y (selected_screen) = 0; | |
2052 | ||
2053 | #ifdef SIGWINCH | |
2054 | #ifndef CANNOT_DUMP | |
2055 | if (initialized) | |
2056 | #endif /* CANNOT_DUMP */ | |
2057 | signal (SIGWINCH, window_change_signal); | |
2058 | #endif /* SIGWINCH */ | |
2059 | } | |
2060 | \f | |
2061 | syms_of_display () | |
2062 | { | |
2063 | #ifdef MULTI_SCREEN | |
2064 | defsubr (&Sredraw_screen); | |
2065 | #endif | |
2066 | defsubr (&Sredraw_display); | |
2067 | defsubr (&Sopen_termscript); | |
2068 | defsubr (&Sding); | |
2069 | defsubr (&Ssit_for); | |
2070 | defsubr (&Ssleep_for); | |
2071 | defsubr (&Ssend_string_to_terminal); | |
2072 | ||
2073 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2074 | "The output baud rate of the terminal.\n\ | |
2075 | On most systems, changing this value will affect the amount of padding\n\ | |
2076 | and the other strategic decisions made during redisplay."); | |
2077 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
2078 | "*Non-nil means invert the entire screen display.\n\ | |
2079 | This means everything is in inverse video which otherwise would not be."); | |
2080 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
2081 | "*Non-nil means try to flash the screen to represent a bell."); | |
2082 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, | |
2083 | "*Non-nil means no need to redraw entire screen after suspending.\n\ | |
2084 | A non-nil value is useful if the terminal can automatically preserve\n\ | |
2085 | Emacs's screen display when you reenter Emacs.\n\ | |
2086 | It is up to you to set this variable if your terminal can do that."); | |
2087 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2088 | "A symbol naming the window-system under which Emacs is running\n\ | |
2089 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2090 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2091 | "The version number of the window system in use.\n\ | |
2092 | For X windows, this is 10 or 11."); | |
2093 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2094 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2095 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
2096 | "Table defining how to output a glyph code to the screen.\n\ | |
2097 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ | |
2098 | Each element can be:\n\ | |
2099 | integer: a glyph code which this glyph is an alias for.\n\ | |
2100 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2101 | nil: this glyph mod 256 is char code to output,\n\ | |
2102 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2103 | Vglyph_table = Qnil; | |
2104 | ||
2105 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2106 | "Display table to use for buffers that specify none.\n\ | |
2107 | See `buffer-display-table' for more information."); | |
2108 | Vstandard_display_table = Qnil; | |
2109 | ||
2110 | /* Initialize `window-system', unless init_display already decided it. */ | |
2111 | #ifdef CANNOT_DUMP | |
2112 | if (noninteractive) | |
2113 | #endif | |
2114 | { | |
2115 | Vwindow_system = Qnil; | |
2116 | Vwindow_system_version = Qnil; | |
2117 | } | |
2118 | } | |
2119 |