Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
f8c25f1b | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95 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 | |
fa61c701 | 8 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
4588ec20 JB |
20 | |
21 | ||
22 | #include <signal.h> | |
23 | ||
18160b98 | 24 | #include <config.h> |
565620a5 RS |
25 | |
26 | #include <stdio.h> | |
4588ec20 JB |
27 | #include <ctype.h> |
28 | ||
47099d6f | 29 | #include "lisp.h" |
4588ec20 JB |
30 | #include "termchar.h" |
31 | #include "termopts.h" | |
3be08bea | 32 | #include "termhooks.h" |
a0879520 | 33 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
34 | #include "dispextern.h" |
35 | #include "cm.h" | |
4588ec20 | 36 | #include "buffer.h" |
502b9b64 | 37 | #include "frame.h" |
4588ec20 JB |
38 | #include "window.h" |
39 | #include "commands.h" | |
40 | #include "disptab.h" | |
41 | #include "indent.h" | |
d169fe39 | 42 | #include "intervals.h" |
97cf50e7 | 43 | #include "blockinput.h" |
4588ec20 | 44 | |
648fa17d | 45 | #include "systty.h" |
58b2bb63 | 46 | #include "syssignal.h" |
a41f8bed | 47 | |
4588ec20 JB |
48 | #ifdef HAVE_X_WINDOWS |
49 | #include "xterm.h" | |
50 | #endif /* HAVE_X_WINDOWS */ | |
51 | ||
fd2e066a GV |
52 | #ifdef HAVE_NTGUI |
53 | #include "w32term.h" | |
54 | #endif /* HAVE_NTGUI */ | |
55 | ||
6cbd1643 RS |
56 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
57 | #include "systime.h" | |
58 | ||
3883a901 RS |
59 | #include <errno.h> |
60 | ||
4588ec20 JB |
61 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
62 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
63 | ||
4588ec20 JB |
64 | /* Get number of chars of output now in the buffer of a stdio stream. |
65 | This ought to be built in in stdio, but it isn't. | |
66 | Some s- files override this because their stdio internals differ. */ | |
e3271ae5 | 67 | #ifdef __GNU_LIBRARY__ |
097c2824 RM |
68 | /* The s- file might have overridden the definition with one that works for |
69 | the system's C library. But we are using the GNU C library, so this is | |
70 | the right definition for every system. */ | |
3883a901 RS |
71 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
72 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
73 | #else | |
cb5558ff | 74 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 75 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
76 | #endif |
77 | #else /* not __GNU_LIBRARY__ */ | |
cb5558ff | 78 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
79 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
80 | #endif | |
e3271ae5 | 81 | #endif |
4588ec20 | 82 | |
45140e01 RS |
83 | static void change_frame_size_1 (); |
84 | ||
a41f8bed | 85 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 86 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 87 | |
502b9b64 | 88 | int frame_garbaged; |
4588ec20 JB |
89 | |
90 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
91 | ||
92 | int display_completed; | |
93 | ||
94 | /* Lisp variable visible-bell; enables use of screen-flash | |
95 | instead of audible bell. */ | |
96 | ||
97 | int visible_bell; | |
98 | ||
502b9b64 | 99 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
100 | |
101 | int inverse_video; | |
102 | ||
103 | /* Line speed of the terminal. */ | |
104 | ||
105 | int baud_rate; | |
106 | ||
107 | /* nil or a symbol naming the window system under which emacs is | |
108 | running ('x is the only current possibility). */ | |
109 | ||
110 | Lisp_Object Vwindow_system; | |
111 | ||
112 | /* Version number of X windows: 10, 11 or nil. */ | |
113 | Lisp_Object Vwindow_system_version; | |
114 | ||
115 | /* Vector of glyph definitions. Indexed by glyph number, | |
116 | the contents are a string which is how to output the glyph. | |
117 | ||
118 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
119 | as a character code. */ | |
120 | ||
121 | Lisp_Object Vglyph_table; | |
122 | ||
123 | /* Display table to use for vectors that don't specify their own. */ | |
124 | ||
125 | Lisp_Object Vstandard_display_table; | |
126 | ||
127 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
128 | so put cursor on minibuffer after the prompt. |
129 | positive means at end of text in echo area; | |
130 | negative means at beginning of line. */ | |
4588ec20 | 131 | int cursor_in_echo_area; |
9cda4f7c RS |
132 | |
133 | Lisp_Object Qdisplay_table; | |
4588ec20 | 134 | \f |
502b9b64 | 135 | /* The currently selected frame. |
87485d6f MW |
136 | In a single-frame version, this variable always holds the address of |
137 | the_only_frame. */ | |
4588ec20 | 138 | |
502b9b64 | 139 | FRAME_PTR selected_frame; |
4588ec20 | 140 | |
502b9b64 JB |
141 | /* A frame which is not just a minibuffer, or 0 if there are no such |
142 | frames. This is usually the most recent such frame that was | |
87485d6f MW |
143 | selected. In a single-frame version, this variable always holds |
144 | the address of the_only_frame. */ | |
502b9b64 | 145 | FRAME_PTR last_nonminibuf_frame; |
e5d77022 | 146 | |
502b9b64 | 147 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
148 | exist inside frame objects lives in the following structure instead. |
149 | ||
150 | NOTE: the_only_frame is not checked for garbage collection; don't | |
eb8c3be9 | 151 | store collectible objects in any of its fields! |
190721ac JB |
152 | |
153 | You're not/The only frame in town/... */ | |
4588ec20 | 154 | |
502b9b64 JB |
155 | #ifndef MULTI_FRAME |
156 | struct frame the_only_frame; | |
e5d77022 | 157 | #endif |
4588ec20 JB |
158 | |
159 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
160 | which is used inside `update_frame' to hold the old contents |
161 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
162 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
163 | /* Length of vector currently allocated. */ |
164 | int ophys_lines_length; | |
165 | ||
166 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
167 | ||
168 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
169 | ||
170 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
171 | ||
4588ec20 | 172 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 173 | \f |
502b9b64 | 174 | #ifdef MULTI_FRAME |
4588ec20 | 175 | |
502b9b64 JB |
176 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
177 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
178 | (frame) | |
179 | Lisp_Object frame; | |
4588ec20 | 180 | { |
502b9b64 | 181 | FRAME_PTR f; |
4588ec20 | 182 | |
502b9b64 JB |
183 | CHECK_LIVE_FRAME (frame, 0); |
184 | f = XFRAME (frame); | |
185 | update_begin (f); | |
93e54836 RS |
186 | if (FRAME_MSDOS_P (f)) |
187 | set_terminal_modes (); | |
502b9b64 | 188 | clear_frame (); |
b6a65ac2 | 189 | clear_frame_records (f); |
502b9b64 | 190 | update_end (f); |
4588ec20 | 191 | fflush (stdout); |
4588ec20 JB |
192 | windows_or_buffers_changed++; |
193 | /* Mark all windows as INaccurate, | |
194 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
195 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
196 | f->garbaged = 0; | |
4588ec20 JB |
197 | return Qnil; |
198 | } | |
199 | ||
502b9b64 JB |
200 | redraw_frame (f) |
201 | FRAME_PTR f; | |
4588ec20 | 202 | { |
502b9b64 | 203 | Lisp_Object frame; |
e9c9a718 | 204 | XSETFRAME (frame, f); |
502b9b64 | 205 | Fredraw_frame (frame); |
4588ec20 JB |
206 | } |
207 | ||
35f56f96 | 208 | #else |
4588ec20 | 209 | |
d8039c5c | 210 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
5c586a6c KH |
211 | /* Don't confuse make-docfile by having two doc strings for this function. |
212 | make-docfile does not pay attention to #if, for good reason! */ | |
213 | 0) | |
35f56f96 JB |
214 | (frame) |
215 | Lisp_Object frame; | |
4588ec20 JB |
216 | { |
217 | update_begin (0); | |
218 | set_terminal_modes (); | |
502b9b64 | 219 | clear_frame (); |
4588ec20 JB |
220 | update_end (0); |
221 | fflush (stdout); | |
502b9b64 | 222 | clear_frame_records (0); |
4588ec20 JB |
223 | windows_or_buffers_changed++; |
224 | /* Mark all windows as INaccurate, | |
225 | so that every window will have its redisplay done. */ | |
b5c685f4 | 226 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
227 | return Qnil; |
228 | } | |
229 | ||
35f56f96 JB |
230 | #endif |
231 | ||
232 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
233 | "Clear and redisplay all visible frames.") | |
234 | () | |
235 | { | |
236 | Lisp_Object tail, frame; | |
237 | ||
238 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 239 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
240 | Fredraw_frame (frame); |
241 | ||
242 | return Qnil; | |
243 | } | |
244 | ||
9223a96a RS |
245 | /* This is used when frame_garbaged is set. |
246 | Redraw the individual frames marked as garbaged. */ | |
247 | ||
248 | void | |
249 | redraw_garbaged_frames () | |
250 | { | |
251 | Lisp_Object tail, frame; | |
252 | ||
253 | FOR_EACH_FRAME (tail, frame) | |
254 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
255 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
256 | Fredraw_frame (frame); | |
257 | } | |
258 | ||
4588ec20 | 259 | \f |
502b9b64 JB |
260 | static struct frame_glyphs * |
261 | make_frame_glyphs (frame, empty) | |
262 | register FRAME_PTR frame; | |
4588ec20 JB |
263 | int empty; |
264 | { | |
265 | register int i; | |
502b9b64 JB |
266 | register width = FRAME_WIDTH (frame); |
267 | register height = FRAME_HEIGHT (frame); | |
60a8948a RS |
268 | register struct frame_glyphs *new |
269 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 270 | |
502b9b64 | 271 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
272 | new->height = height; |
273 | new->width = width; | |
274 | new->used = (int *) xmalloc (height * sizeof (int)); | |
275 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
60a8948a | 276 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
4588ec20 JB |
277 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
278 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
279 | bzero (new->enable, height * sizeof (char)); | |
280 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
281 | ||
fd2e066a GV |
282 | #ifdef HAVE_WINDOW_SYSTEM |
283 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 284 | { |
4588ec20 JB |
285 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
286 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
287 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
288 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 289 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 | 290 | } |
fd2e066a | 291 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
292 | |
293 | if (empty) | |
294 | { | |
295 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 296 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 | 297 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
d52bad65 | 298 | unsigned int total_charstarts = (width + 2) * sizeof (int); |
4588ec20 JB |
299 | |
300 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
301 | bzero (new->total_contents, total_glyphs); | |
d52bad65 RS |
302 | |
303 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
aba5d0f4 | 304 | bzero (new->total_charstarts, total_charstarts); |
4588ec20 JB |
305 | } |
306 | else | |
307 | { | |
308 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
309 | ||
310 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
311 | bzero (new->total_contents, total_glyphs); | |
312 | for (i = 0; i < height; i++) | |
313 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
60a8948a RS |
314 | |
315 | if (!FRAME_TERMCAP_P (frame)) | |
316 | { | |
317 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); | |
318 | ||
319 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
320 | bzero (new->total_charstarts, total_charstarts); | |
321 | for (i = 0; i < height; i++) | |
322 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; | |
323 | } | |
324 | else | |
325 | { | |
326 | /* Without a window system, we don't really need charstarts. | |
327 | So use a small amount of space to make enough data structure | |
328 | to prevent crashes in display_text_line. */ | |
329 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); | |
330 | for (i = 0; i < height; i++) | |
331 | new->charstarts[i] = new->total_charstarts; | |
332 | } | |
4588ec20 JB |
333 | } |
334 | ||
335 | return new; | |
336 | } | |
337 | ||
05233a7d | 338 | void |
502b9b64 JB |
339 | free_frame_glyphs (frame, glyphs) |
340 | FRAME_PTR frame; | |
341 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
342 | { |
343 | if (glyphs->total_contents) | |
9ac0d9e0 | 344 | xfree (glyphs->total_contents); |
60a8948a RS |
345 | if (glyphs->total_charstarts) |
346 | xfree (glyphs->total_charstarts); | |
4588ec20 | 347 | |
9ac0d9e0 JB |
348 | xfree (glyphs->used); |
349 | xfree (glyphs->glyphs); | |
350 | xfree (glyphs->highlight); | |
351 | xfree (glyphs->enable); | |
352 | xfree (glyphs->bufp); | |
60a8948a RS |
353 | if (glyphs->charstarts) |
354 | xfree (glyphs->charstarts); | |
4588ec20 | 355 | |
fd2e066a GV |
356 | #ifdef HAVE_WINDOW_SYSTEM |
357 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 358 | { |
9ac0d9e0 JB |
359 | xfree (glyphs->top_left_x); |
360 | xfree (glyphs->top_left_y); | |
361 | xfree (glyphs->pix_width); | |
362 | xfree (glyphs->pix_height); | |
363 | xfree (glyphs->max_ascent); | |
4588ec20 | 364 | } |
fd2e066a | 365 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 366 | |
9ac0d9e0 | 367 | xfree (glyphs); |
4588ec20 JB |
368 | } |
369 | ||
45140e01 | 370 | void |
502b9b64 JB |
371 | remake_frame_glyphs (frame) |
372 | FRAME_PTR frame; | |
4588ec20 | 373 | { |
502b9b64 JB |
374 | if (FRAME_CURRENT_GLYPHS (frame)) |
375 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
376 | if (FRAME_DESIRED_GLYPHS (frame)) | |
377 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
378 | if (FRAME_TEMP_GLYPHS (frame)) | |
379 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
380 | ||
381 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
382 | { |
383 | /* Reallocate the frame's message buffer; remember that | |
384 | echo_area_glyphs may be pointing here. */ | |
385 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
386 | ||
387 | FRAME_MESSAGE_BUF (frame) | |
388 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
389 | FRAME_WIDTH (frame) + 1); | |
390 | ||
391 | if (echo_area_glyphs == old_message_buf) | |
392 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
393 | if (previous_echo_glyphs == old_message_buf) | |
394 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
395 | } | |
4588ec20 | 396 | else |
502b9b64 JB |
397 | FRAME_MESSAGE_BUF (frame) |
398 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 399 | |
502b9b64 JB |
400 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
401 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
402 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
8a376b3b | 403 | if (FRAME_WINDOW_P (frame) || frame == selected_frame) |
45140e01 | 404 | SET_FRAME_GARBAGED (frame); |
4588ec20 JB |
405 | } |
406 | \f | |
502b9b64 | 407 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
408 | |
409 | static int | |
410 | line_hash_code (m, vpos) | |
502b9b64 | 411 | register struct frame_glyphs *m; |
4588ec20 JB |
412 | int vpos; |
413 | { | |
414 | register GLYPH *body, *end; | |
415 | register int h = 0; | |
416 | ||
417 | if (!m->enable[vpos]) | |
418 | return 0; | |
419 | ||
94aa5d2d | 420 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
421 | so as to encourage scrolling to leave them in place. */ |
422 | if (m->highlight[vpos]) | |
423 | return -1; | |
424 | ||
425 | body = m->glyphs[vpos]; | |
426 | ||
427 | if (must_write_spaces) | |
428 | while (1) | |
429 | { | |
430 | GLYPH g = *body++; | |
431 | ||
432 | if (g == 0) | |
433 | break; | |
434 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
435 | } | |
436 | else | |
437 | while (1) | |
438 | { | |
439 | GLYPH g = *body++; | |
440 | ||
441 | if (g == 0) | |
442 | break; | |
443 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
444 | } | |
445 | ||
446 | if (h) | |
447 | return h; | |
448 | return 1; | |
449 | } | |
450 | ||
451 | /* Return number of characters in line in M at vpos VPOS, | |
452 | except don't count leading and trailing spaces | |
453 | unless the terminal requires those to be explicitly output. */ | |
454 | ||
455 | static unsigned int | |
456 | line_draw_cost (m, vpos) | |
502b9b64 | 457 | struct frame_glyphs *m; |
4588ec20 JB |
458 | int vpos; |
459 | { | |
460 | register GLYPH *beg = m->glyphs[vpos]; | |
461 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
462 | register int i; | |
463 | register int tlen = GLYPH_TABLE_LENGTH; | |
464 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
465 | ||
466 | /* Ignore trailing and leading spaces if we can. */ | |
467 | if (!must_write_spaces) | |
468 | { | |
469 | while ((end != beg) && (*end == SPACEGLYPH)) | |
470 | --end; | |
471 | if (end == beg) | |
472 | return (0); /* All blank line. */ | |
473 | ||
474 | while (*beg == SPACEGLYPH) | |
475 | ++beg; | |
476 | } | |
477 | ||
478 | /* If we don't have a glyph-table, each glyph is one character, | |
479 | so return the number of glyphs. */ | |
480 | if (tbase == 0) | |
481 | return end - beg; | |
482 | ||
483 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
484 | i = 0; | |
485 | while ((beg <= end) && *beg) | |
486 | { | |
487 | register GLYPH g = *beg++; | |
488 | ||
489 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
490 | i += 1; | |
491 | else | |
492 | i += GLYPH_LENGTH (tbase, g); | |
493 | } | |
494 | return i; | |
495 | } | |
496 | \f | |
497 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
498 | ||
499 | The only other interface into redisplay is through setting | |
502b9b64 JB |
500 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
501 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
502 | |
503 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
504 | ||
502b9b64 | 505 | cancel_line (vpos, frame) |
4588ec20 | 506 | int vpos; |
502b9b64 | 507 | register FRAME_PTR frame; |
4588ec20 | 508 | { |
502b9b64 | 509 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
510 | } |
511 | ||
502b9b64 JB |
512 | clear_frame_records (frame) |
513 | register FRAME_PTR frame; | |
4588ec20 | 514 | { |
502b9b64 | 515 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
516 | } |
517 | ||
836d2cde RS |
518 | /* Clear out all display lines for a coming redisplay. */ |
519 | ||
520 | void | |
521 | init_desired_glyphs (frame) | |
522 | register FRAME_PTR frame; | |
523 | { | |
524 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
525 | int vpos; | |
526 | int height = FRAME_HEIGHT (frame); | |
527 | ||
528 | for (vpos = 0; vpos < height; vpos++) | |
529 | desired_glyphs->enable[vpos] = 0; | |
530 | } | |
531 | ||
4588ec20 JB |
532 | /* Prepare to display on line VPOS starting at HPOS within it. */ |
533 | ||
534 | void | |
502b9b64 JB |
535 | get_display_line (frame, vpos, hpos) |
536 | register FRAME_PTR frame; | |
4588ec20 JB |
537 | int vpos; |
538 | register int hpos; | |
539 | { | |
502b9b64 JB |
540 | register struct frame_glyphs *glyphs; |
541 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
542 | register GLYPH *p; |
543 | ||
7c3c72ec | 544 | if (vpos < 0) |
4588ec20 JB |
545 | abort (); |
546 | ||
4588ec20 JB |
547 | if (! desired_glyphs->enable[vpos]) |
548 | { | |
549 | desired_glyphs->used[vpos] = 0; | |
550 | desired_glyphs->highlight[vpos] = 0; | |
551 | desired_glyphs->enable[vpos] = 1; | |
552 | } | |
553 | ||
554 | if (hpos > desired_glyphs->used[vpos]) | |
555 | { | |
556 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
557 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
558 | ||
559 | desired_glyphs->used[vpos] = hpos; | |
560 | while (g != end) | |
561 | *g++ = SPACEGLYPH; | |
562 | } | |
563 | } | |
564 | ||
565 | /* Like bcopy except never gets confused by overlap. */ | |
566 | ||
567 | void | |
568 | safe_bcopy (from, to, size) | |
569 | char *from, *to; | |
570 | int size; | |
571 | { | |
b5c685f4 | 572 | if (size <= 0 || from == to) |
4588ec20 JB |
573 | return; |
574 | ||
b5c685f4 JB |
575 | /* If the source and destination don't overlap, then bcopy can |
576 | handle it. If they do overlap, but the destination is lower in | |
577 | memory than the source, we'll assume bcopy can handle that. */ | |
578 | if (to < from || from + size <= to) | |
579 | bcopy (from, to, size); | |
580 | ||
581 | /* Otherwise, we'll copy from the end. */ | |
582 | else | |
4588ec20 | 583 | { |
b5c685f4 JB |
584 | register char *endf = from + size; |
585 | register char *endt = to + size; | |
4588ec20 JB |
586 | |
587 | /* If TO - FROM is large, then we should break the copy into | |
588 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
589 | TO - FROM is small, then the bcopy function call overhead | |
590 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
591 | anywhere. Since I don't think the obvious copy loop is too |
592 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
593 | if (to - from < 64) |
594 | { | |
595 | do | |
596 | *--endt = *--endf; | |
597 | while (endf != from); | |
598 | } | |
599 | else | |
600 | { | |
b5c685f4 | 601 | for (;;) |
4588ec20 JB |
602 | { |
603 | endt -= (to - from); | |
604 | endf -= (to - from); | |
605 | ||
b5c685f4 JB |
606 | if (endt < to) |
607 | break; | |
608 | ||
4588ec20 JB |
609 | bcopy (endf, endt, to - from); |
610 | } | |
b5c685f4 JB |
611 | |
612 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
613 | little left over. The amount left over is |
614 | (endt + (to - from)) - to, which is endt - from. */ | |
615 | bcopy (from, to, endt - from); | |
616 | } | |
617 | } | |
4588ec20 JB |
618 | } |
619 | ||
98038dc0 | 620 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
621 | DISTANCE may be negative. */ |
622 | ||
623 | static void | |
624 | rotate_vector (vector, size, distance) | |
625 | char *vector; | |
626 | int size; | |
627 | int distance; | |
628 | { | |
629 | char *temp = (char *) alloca (size); | |
630 | ||
631 | if (distance < 0) | |
632 | distance += size; | |
633 | ||
634 | bcopy (vector, temp + distance, size - distance); | |
635 | bcopy (vector + size - distance, temp, distance); | |
636 | bcopy (temp, vector, size); | |
637 | } | |
638 | ||
639 | /* Scroll lines from vpos FROM up to but not including vpos END | |
640 | down by AMOUNT lines (AMOUNT may be negative). | |
641 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
642 | ||
643 | int | |
d52bad65 | 644 | scroll_frame_lines (frame, from, end, amount, newpos) |
502b9b64 | 645 | register FRAME_PTR frame; |
d52bad65 | 646 | int from, end, amount, newpos; |
4588ec20 JB |
647 | { |
648 | register int i; | |
502b9b64 JB |
649 | register struct frame_glyphs *current_frame |
650 | = FRAME_CURRENT_GLYPHS (frame); | |
d52bad65 | 651 | int pos_adjust; |
23b0200c | 652 | int width = FRAME_WIDTH (frame); |
4588ec20 JB |
653 | |
654 | if (!line_ins_del_ok) | |
655 | return 0; | |
656 | ||
657 | if (amount == 0) | |
658 | return 1; | |
659 | ||
660 | if (amount > 0) | |
661 | { | |
502b9b64 | 662 | update_begin (frame); |
4588ec20 JB |
663 | set_terminal_window (end + amount); |
664 | if (!scroll_region_ok) | |
665 | ins_del_lines (end, -amount); | |
666 | ins_del_lines (from, amount); | |
667 | set_terminal_window (0); | |
668 | ||
502b9b64 | 669 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
670 | sizeof (GLYPH *) * (end + amount - from), |
671 | amount * sizeof (GLYPH *)); | |
672 | ||
60a8948a | 673 | rotate_vector (current_frame->charstarts + from, |
d52bad65 RS |
674 | sizeof (int *) * (end + amount - from), |
675 | amount * sizeof (int *)); | |
676 | ||
23b0200c RS |
677 | safe_bcopy (current_frame->used + from, |
678 | current_frame->used + from + amount, | |
679 | (end - from) * sizeof current_frame->used[0]); | |
680 | ||
681 | safe_bcopy (current_frame->highlight + from, | |
682 | current_frame->highlight + from + amount, | |
683 | (end - from) * sizeof current_frame->highlight[0]); | |
684 | ||
685 | safe_bcopy (current_frame->enable + from, | |
686 | current_frame->enable + from + amount, | |
687 | (end - from) * sizeof current_frame->enable[0]); | |
688 | ||
d52bad65 RS |
689 | /* Adjust the lines by an amount |
690 | that puts the first of them at NEWPOS. */ | |
23b0200c | 691 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
692 | |
693 | /* Offset each char position in the charstarts lines we moved | |
694 | by pos_adjust. */ | |
23b0200c | 695 | for (i = from + amount; i < end + amount; i++) |
60a8948a | 696 | { |
d52bad65 | 697 | int *line = current_frame->charstarts[i]; |
60a8948a | 698 | int col; |
23b0200c RS |
699 | for (col = 0; col < width; col++) |
700 | if (line[col] > 0) | |
701 | line[col] += pos_adjust; | |
60a8948a | 702 | } |
23b0200c | 703 | for (i = from; i < from + amount; i++) |
60a8948a | 704 | { |
d52bad65 | 705 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
706 | int col; |
707 | line[0] = -1; | |
23b0200c | 708 | for (col = 0; col < width; col++) |
60a8948a RS |
709 | line[col] = 0; |
710 | } | |
711 | ||
4588ec20 JB |
712 | /* Mark the lines made empty by scrolling as enabled, empty and |
713 | normal video. */ | |
502b9b64 JB |
714 | bzero (current_frame->used + from, |
715 | amount * sizeof current_frame->used[0]); | |
716 | bzero (current_frame->highlight + from, | |
717 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
718 | for (i = from; i < from + amount; i++) |
719 | { | |
502b9b64 | 720 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 721 | current_frame->charstarts[i][0] = -1; |
502b9b64 | 722 | current_frame->enable[i] = 1; |
4588ec20 JB |
723 | } |
724 | ||
502b9b64 JB |
725 | safe_bcopy (current_frame->bufp + from, |
726 | current_frame->bufp + from + amount, | |
727 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 | 728 | |
fd2e066a GV |
729 | #ifdef HAVE_WINDOW_SYSTEM |
730 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 731 | { |
502b9b64 JB |
732 | safe_bcopy (current_frame->top_left_x + from, |
733 | current_frame->top_left_x + from + amount, | |
734 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 735 | |
502b9b64 JB |
736 | safe_bcopy (current_frame->top_left_y + from, |
737 | current_frame->top_left_y + from + amount, | |
738 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 739 | |
502b9b64 JB |
740 | safe_bcopy (current_frame->pix_width + from, |
741 | current_frame->pix_width + from + amount, | |
742 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 743 | |
502b9b64 JB |
744 | safe_bcopy (current_frame->pix_height + from, |
745 | current_frame->pix_height + from + amount, | |
746 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
747 | |
748 | safe_bcopy (current_frame->max_ascent + from, | |
749 | current_frame->max_ascent + from + amount, | |
750 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 | 751 | } |
fd2e066a | 752 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 753 | |
502b9b64 | 754 | update_end (frame); |
4588ec20 JB |
755 | } |
756 | if (amount < 0) | |
757 | { | |
502b9b64 | 758 | update_begin (frame); |
4588ec20 JB |
759 | set_terminal_window (end); |
760 | ins_del_lines (from + amount, amount); | |
761 | if (!scroll_region_ok) | |
762 | ins_del_lines (end + amount, -amount); | |
763 | set_terminal_window (0); | |
764 | ||
502b9b64 | 765 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
766 | sizeof (GLYPH *) * (end - from - amount), |
767 | amount * sizeof (GLYPH *)); | |
768 | ||
60a8948a | 769 | rotate_vector (current_frame->charstarts + from + amount, |
d52bad65 RS |
770 | sizeof (int *) * (end - from - amount), |
771 | amount * sizeof (int *)); | |
772 | ||
23b0200c RS |
773 | safe_bcopy (current_frame->used + from, |
774 | current_frame->used + from + amount, | |
775 | (end - from) * sizeof current_frame->used[0]); | |
776 | ||
777 | safe_bcopy (current_frame->highlight + from, | |
778 | current_frame->highlight + from + amount, | |
779 | (end - from) * sizeof current_frame->highlight[0]); | |
780 | ||
781 | safe_bcopy (current_frame->enable + from, | |
782 | current_frame->enable + from + amount, | |
783 | (end - from) * sizeof current_frame->enable[0]); | |
784 | ||
d52bad65 RS |
785 | /* Adjust the lines by an amount |
786 | that puts the first of them at NEWPOS. */ | |
23b0200c | 787 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
788 | |
789 | /* Offset each char position in the charstarts lines we moved | |
790 | by pos_adjust. */ | |
791 | for (i = from + amount; i < end + amount; i++) | |
792 | { | |
d52bad65 | 793 | int *line = current_frame->charstarts[i]; |
60a8948a | 794 | int col; |
23b0200c RS |
795 | for (col = 0; col < width; col++) |
796 | if (line[col] > 0) | |
797 | line[col] += pos_adjust; | |
60a8948a | 798 | } |
23b0200c | 799 | for (i = end + amount; i < end; i++) |
60a8948a | 800 | { |
d52bad65 | 801 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
802 | int col; |
803 | line[0] = -1; | |
23b0200c | 804 | for (col = 0; col < width; col++) |
60a8948a RS |
805 | line[col] = 0; |
806 | } | |
807 | ||
4588ec20 JB |
808 | /* Mark the lines made empty by scrolling as enabled, empty and |
809 | normal video. */ | |
502b9b64 JB |
810 | bzero (current_frame->used + end + amount, |
811 | - amount * sizeof current_frame->used[0]); | |
812 | bzero (current_frame->highlight + end + amount, | |
813 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
814 | for (i = end + amount; i < end; i++) |
815 | { | |
502b9b64 | 816 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 817 | current_frame->charstarts[i][0] = 0; |
502b9b64 | 818 | current_frame->enable[i] = 1; |
4588ec20 JB |
819 | } |
820 | ||
502b9b64 JB |
821 | safe_bcopy (current_frame->bufp + from, |
822 | current_frame->bufp + from + amount, | |
823 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 | 824 | |
fd2e066a GV |
825 | #ifdef HAVE_WINDOW_SYSTEM |
826 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 827 | { |
502b9b64 JB |
828 | safe_bcopy (current_frame->top_left_x + from, |
829 | current_frame->top_left_x + from + amount, | |
830 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 831 | |
502b9b64 JB |
832 | safe_bcopy (current_frame->top_left_y + from, |
833 | current_frame->top_left_y + from + amount, | |
834 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 835 | |
502b9b64 JB |
836 | safe_bcopy (current_frame->pix_width + from, |
837 | current_frame->pix_width + from + amount, | |
838 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 839 | |
502b9b64 JB |
840 | safe_bcopy (current_frame->pix_height + from, |
841 | current_frame->pix_height + from + amount, | |
842 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
843 | |
844 | safe_bcopy (current_frame->max_ascent + from, | |
845 | current_frame->max_ascent + from + amount, | |
846 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 | 847 | } |
fd2e066a | 848 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 849 | |
502b9b64 | 850 | update_end (frame); |
4588ec20 JB |
851 | } |
852 | return 1; | |
853 | } | |
854 | \f | |
502b9b64 | 855 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 856 | copy all the columns that W does not occupy |
502b9b64 JB |
857 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
858 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
859 | |
860 | preserve_other_columns (w) | |
861 | struct window *w; | |
862 | { | |
863 | register int vpos; | |
502b9b64 JB |
864 | register struct frame_glyphs *current_frame, *desired_frame; |
865 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
866 | int start = XFASTINT (w->left); |
867 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
868 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
869 | ||
502b9b64 JB |
870 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
871 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
872 | |
873 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
874 | { | |
502b9b64 | 875 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
876 | { |
877 | if (start > 0) | |
878 | { | |
879 | int len; | |
880 | ||
502b9b64 | 881 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 | 882 | desired_frame->glyphs[vpos], |
4b34bd81 | 883 | start * sizeof (current_frame->glyphs[vpos][0])); |
60a8948a RS |
884 | bcopy (current_frame->charstarts[vpos], |
885 | desired_frame->charstarts[vpos], | |
4b34bd81 | 886 | start * sizeof (current_frame->charstarts[vpos][0])); |
502b9b64 JB |
887 | len = min (start, current_frame->used[vpos]); |
888 | if (desired_frame->used[vpos] < len) | |
889 | desired_frame->used[vpos] = len; | |
4588ec20 | 890 | } |
502b9b64 JB |
891 | if (current_frame->used[vpos] > end |
892 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 893 | { |
502b9b64 | 894 | while (desired_frame->used[vpos] < end) |
60a8948a RS |
895 | { |
896 | int used = desired_frame->used[vpos]++; | |
897 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; | |
898 | desired_frame->glyphs[vpos][used] = 0; | |
899 | } | |
502b9b64 JB |
900 | bcopy (current_frame->glyphs[vpos] + end, |
901 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 | 902 | ((current_frame->used[vpos] - end) |
4b34bd81 | 903 | * sizeof (current_frame->glyphs[vpos][0]))); |
60a8948a RS |
904 | bcopy (current_frame->charstarts[vpos] + end, |
905 | desired_frame->charstarts[vpos] + end, | |
906 | ((current_frame->used[vpos] - end) | |
4b34bd81 | 907 | * sizeof (current_frame->charstarts[vpos][0]))); |
502b9b64 | 908 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
909 | } |
910 | } | |
911 | } | |
912 | } | |
913 | \f | |
914 | #if 0 | |
915 | ||
502b9b64 | 916 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 917 | copy all the columns that w does occupy |
502b9b64 JB |
918 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
919 | so that update_frame will not change those columns. | |
4588ec20 JB |
920 | |
921 | Have not been able to figure out how to use this correctly. */ | |
922 | ||
923 | preserve_my_columns (w) | |
924 | struct window *w; | |
925 | { | |
926 | register int vpos, fin; | |
502b9b64 JB |
927 | register struct frame_glyphs *l1, *l2; |
928 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
929 | int start = XFASTINT (w->left); |
930 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
931 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
932 | ||
933 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
934 | { | |
502b9b64 JB |
935 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
936 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
937 | { |
938 | if (l2->length > start && l1->length < l2->length) | |
939 | { | |
940 | fin = l2->length; | |
941 | if (fin > end) fin = end; | |
942 | while (l1->length < start) | |
943 | l1->body[l1->length++] = ' '; | |
944 | bcopy (l2->body + start, l1->body + start, fin - start); | |
945 | l1->length = fin; | |
946 | } | |
947 | } | |
948 | } | |
949 | } | |
950 | ||
951 | #endif | |
952 | \f | |
b64b3980 | 953 | /* Adjust by ADJUST the charstart values in window W |
23b0200c | 954 | after vpos VPOS, which counts relative to the frame |
b64b3980 RS |
955 | (not relative to W itself). */ |
956 | ||
957 | void | |
958 | adjust_window_charstarts (w, vpos, adjust) | |
959 | struct window *w; | |
960 | int vpos; | |
961 | int adjust; | |
962 | { | |
963 | int left = XFASTINT (w->left); | |
964 | int top = XFASTINT (w->top); | |
23b0200c RS |
965 | int right = left + window_internal_width (w); |
966 | int bottom = top + window_internal_height (w); | |
b64b3980 RS |
967 | int i; |
968 | ||
23b0200c | 969 | for (i = vpos + 1; i < bottom; i++) |
b64b3980 RS |
970 | { |
971 | int *charstart | |
972 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; | |
973 | int j; | |
974 | for (j = left; j < right; j++) | |
975 | if (charstart[j] > 0) | |
976 | charstart[j] += adjust; | |
977 | } | |
978 | } | |
23b0200c | 979 | |
352f1545 RS |
980 | /* Check the charstarts values in the area of window W |
981 | for internal consistency. We cannot check that they are "right"; | |
982 | we can only look for something nonsensical. */ | |
983 | ||
23b0200c RS |
984 | verify_charstarts (w) |
985 | struct window *w; | |
986 | { | |
987 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
988 | int i; | |
989 | int top = XFASTINT (w->top); | |
990 | int bottom = top + window_internal_height (w); | |
991 | int left = XFASTINT (w->left); | |
992 | int right = left + window_internal_width (w); | |
993 | int next_line; | |
352f1545 RS |
994 | int truncate = (XINT (w->hscroll) |
995 | || (truncate_partial_width_windows | |
996 | && (XFASTINT (w->width) < FRAME_WIDTH (f))) | |
997 | || !NILP (XBUFFER (w->buffer)->truncate_lines)); | |
23b0200c RS |
998 | |
999 | for (i = top; i < bottom; i++) | |
1000 | { | |
1001 | int j; | |
1002 | int last; | |
352f1545 | 1003 | int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; |
23b0200c RS |
1004 | |
1005 | if (i != top) | |
352f1545 RS |
1006 | { |
1007 | if (truncate) | |
1008 | { | |
1009 | /* If we are truncating lines, allow a jump | |
1010 | in charstarts from one line to the next. */ | |
1011 | if (charstart[left] < next_line) | |
1012 | abort (); | |
1013 | } | |
1014 | else | |
1015 | { | |
1016 | if (charstart[left] != next_line) | |
1017 | abort (); | |
1018 | } | |
1019 | } | |
23b0200c RS |
1020 | |
1021 | for (j = left; j < right; j++) | |
1022 | if (charstart[j] > 0) | |
1023 | last = charstart[j]; | |
2e8907d3 RS |
1024 | /* Record where the next line should start. */ |
1025 | next_line = last; | |
1026 | if (BUF_ZV (XBUFFER (w->buffer)) != last) | |
1027 | { | |
1028 | /* If there's a newline between the two lines, count that. */ | |
1029 | int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); | |
1030 | if (endchar == '\n') | |
1031 | next_line++; | |
1032 | } | |
23b0200c RS |
1033 | } |
1034 | } | |
b64b3980 | 1035 | \f |
4588ec20 JB |
1036 | /* On discovering that the redisplay for a window was no good, |
1037 | cancel the columns of that window, so that when the window is | |
1038 | displayed over again get_display_line will not complain. */ | |
1039 | ||
1040 | cancel_my_columns (w) | |
1041 | struct window *w; | |
1042 | { | |
1043 | register int vpos; | |
60a8948a RS |
1044 | register struct frame_glyphs *desired_glyphs |
1045 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
1046 | register int start = XFASTINT (w->left); |
1047 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
1048 | ||
1049 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
1050 | if (desired_glyphs->enable[vpos] | |
1051 | && desired_glyphs->used[vpos] >= start) | |
1052 | desired_glyphs->used[vpos] = start; | |
1053 | } | |
1054 | \f | |
502b9b64 | 1055 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
1056 | the necessary output for one change in the buffer. |
1057 | They may return 0 meaning nothing was done if anything is difficult, | |
1058 | or 1 meaning the output was performed properly. | |
502b9b64 | 1059 | They assume that the frame was up to date before the buffer |
94aa5d2d | 1060 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
1061 | see command_loop_1 where these are called. */ |
1062 | ||
1063 | int | |
1064 | direct_output_for_insert (g) | |
1065 | int g; | |
1066 | { | |
502b9b64 JB |
1067 | register FRAME_PTR frame = selected_frame; |
1068 | register struct frame_glyphs *current_frame | |
1069 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
1070 | |
1071 | #ifndef COMPILER_REGISTER_BUG | |
1072 | register | |
1073 | #endif /* COMPILER_REGISTER_BUG */ | |
1074 | struct window *w = XWINDOW (selected_window); | |
1075 | #ifndef COMPILER_REGISTER_BUG | |
1076 | register | |
1077 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1078 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
1079 | #ifndef COMPILER_REGISTER_BUG |
1080 | register | |
1081 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1082 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 1083 | |
fa61c701 JB |
1084 | /* Give up if about to continue line. */ |
1085 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
1086 | ||
4588ec20 JB |
1087 | /* Avoid losing if cursor is in invisible text off left margin */ |
1088 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
1089 | ||
1090 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 1091 | || cursor_in_echo_area |
502b9b64 JB |
1092 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
1093 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 1094 | |
502b9b64 | 1095 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
1096 | || !display_completed |
1097 | ||
1098 | /* Give up if buffer appears in two places. */ | |
1099 | || buffer_shared > 1 | |
1100 | ||
d169fe39 RS |
1101 | #ifdef USE_TEXT_PROPERTIES |
1102 | /* Intervals have already been adjusted, point is after the | |
1103 | character that was just inserted. */ | |
ef4d2f9e | 1104 | /* Give up if character is invisible. */ |
d169fe39 RS |
1105 | /* Give up if character has a face property. |
1106 | At the moment we only lose at end of line or end of buffer | |
1107 | and only with faces that have some background */ | |
1108 | /* Instead of wasting time, give up if character has any text properties */ | |
254277e1 | 1109 | || ! NILP (Ftext_properties_at (make_number (point - 1), Qnil)) |
d169fe39 RS |
1110 | #endif |
1111 | ||
4588ec20 JB |
1112 | /* Give up if w is minibuffer and a message is being displayed there */ |
1113 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
1114 | return 0; | |
1115 | ||
517b2e01 | 1116 | { |
19dff8dc | 1117 | int face = 0; |
87485d6f | 1118 | #ifdef HAVE_FACES |
517b2e01 | 1119 | int dummy; |
19dff8dc | 1120 | |
93e54836 | 1121 | if (FRAME_WINDOW_P (frame) || FRAME_MSDOS_P (frame)) |
ea62c5a5 | 1122 | face = compute_char_face (frame, w, point - 1, -1, -1, &dummy, point, 0); |
517b2e01 | 1123 | #endif |
a1c3de84 | 1124 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
839c7dfb RS |
1125 | current_frame->charstarts[vpos][hpos] = point - 1; |
1126 | /* Record the entry for after the newly inserted character. */ | |
1127 | current_frame->charstarts[vpos][hpos + 1] = point; | |
b64b3980 | 1128 | adjust_window_charstarts (w, vpos, 1); |
517b2e01 | 1129 | } |
4588ec20 JB |
1130 | unchanged_modified = MODIFF; |
1131 | beg_unchanged = GPT - BEG; | |
a5d8b611 KH |
1132 | XSETFASTINT (w->last_point, point); |
1133 | XSETFASTINT (w->last_point_x, hpos); | |
1134 | XSETFASTINT (w->last_modified, MODIFF); | |
4588ec20 JB |
1135 | |
1136 | reassert_line_highlight (0, vpos); | |
502b9b64 | 1137 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 1138 | fflush (stdout); |
502b9b64 JB |
1139 | ++FRAME_CURSOR_X (frame); |
1140 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 1141 | { |
502b9b64 JB |
1142 | current_frame->used[vpos] = hpos + 1; |
1143 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
1144 | } |
1145 | ||
1146 | return 1; | |
1147 | } | |
1148 | ||
1149 | int | |
1150 | direct_output_forward_char (n) | |
1151 | int n; | |
1152 | { | |
502b9b64 | 1153 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 1154 | register struct window *w = XWINDOW (selected_window); |
254277e1 | 1155 | Lisp_Object position; |
ea0d86af RS |
1156 | int hpos = FRAME_CURSOR_X (frame); |
1157 | ||
1158 | /* Give up if in truncated text at end of line. */ | |
1159 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1) | |
1160 | return 0; | |
1161 | ||
a9764248 JB |
1162 | /* Avoid losing if cursor is in invisible text off left margin |
1163 | or about to go off either side of window. */ | |
502b9b64 | 1164 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
1165 | && (XINT (w->hscroll) || n < 0)) |
1166 | || (n > 0 | |
fa61c701 | 1167 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 1168 | || cursor_in_echo_area) |
4588ec20 | 1169 | return 0; |
15874c59 | 1170 | |
de83c314 RS |
1171 | /* Can't use direct output if highlighting a region. */ |
1172 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1173 | return 0; | |
1174 | ||
15874c59 KH |
1175 | /* Can't use direct output at an overlay boundary; it might have |
1176 | before-string or after-string properties. */ | |
1177 | if (overlay_touches_p (PT) || overlay_touches_p (PT - n)) | |
1178 | return 0; | |
1179 | ||
d169fe39 RS |
1180 | #ifdef USE_TEXT_PROPERTIES |
1181 | /* Don't use direct output next to an invisible character | |
1182 | since we might need to do something special. */ | |
1183 | ||
a5d8b611 | 1184 | XSETFASTINT (position, point); |
2f24f5ac | 1185 | if (XFASTINT (position) < ZV |
294634fb | 1186 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1187 | Qinvisible, |
294634fb KH |
1188 | selected_window))) |
1189 | return 0; | |
d169fe39 | 1190 | |
a5d8b611 | 1191 | XSETFASTINT (position, point - 1); |
2f24f5ac | 1192 | if (XFASTINT (position) >= BEGV |
294634fb | 1193 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1194 | Qinvisible, |
294634fb KH |
1195 | selected_window))) |
1196 | return 0; | |
d169fe39 RS |
1197 | #endif |
1198 | ||
502b9b64 | 1199 | FRAME_CURSOR_X (frame) += n; |
a5d8b611 KH |
1200 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (frame)); |
1201 | XSETFASTINT (w->last_point, point); | |
502b9b64 | 1202 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 1203 | fflush (stdout); |
d169fe39 | 1204 | |
4588ec20 JB |
1205 | return 1; |
1206 | } | |
1207 | \f | |
1208 | static void update_line (); | |
1209 | ||
502b9b64 | 1210 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
1211 | Value is nonzero if redisplay stopped due to pending input. |
1212 | FORCE nonzero means do not stop for pending input. */ | |
1213 | ||
1214 | int | |
502b9b64 JB |
1215 | update_frame (f, force, inhibit_hairy_id) |
1216 | FRAME_PTR f; | |
4588ec20 JB |
1217 | int force; |
1218 | int inhibit_hairy_id; | |
1219 | { | |
54633da0 | 1220 | register struct frame_glyphs *current_frame; |
7098a0fa | 1221 | register struct frame_glyphs *desired_frame = 0; |
4588ec20 JB |
1222 | register int i; |
1223 | int pause; | |
1224 | int preempt_count = baud_rate / 2400 + 1; | |
1225 | extern input_pending; | |
fd2e066a | 1226 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 JB |
1227 | register int downto, leftmost; |
1228 | #endif | |
1229 | ||
c37e4889 RS |
1230 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
1231 | calculate_costs (f); | |
1232 | ||
d88c2b9e RS |
1233 | if (preempt_count <= 0) |
1234 | preempt_count = 1; | |
1235 | ||
502b9b64 | 1236 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1237 | |
1238 | detect_input_pending (); | |
1239 | if (input_pending && !force) | |
1240 | { | |
1241 | pause = 1; | |
1242 | goto do_pause; | |
1243 | } | |
1244 | ||
502b9b64 | 1245 | update_begin (f); |
4588ec20 JB |
1246 | |
1247 | if (!line_ins_del_ok) | |
1248 | inhibit_hairy_id = 1; | |
1249 | ||
7098a0fa RS |
1250 | /* These are separate to avoid a possible bug in the AIX C compiler. */ |
1251 | current_frame = FRAME_CURRENT_GLYPHS (f); | |
1252 | desired_frame = FRAME_DESIRED_GLYPHS (f); | |
1253 | ||
efb859b4 JB |
1254 | /* See if any of the desired lines are enabled; don't compute for |
1255 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1256 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1257 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1258 | break; |
1259 | ||
1260 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1261 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1262 | force |= scrolling (f); | |
4588ec20 JB |
1263 | |
1264 | /* Update the individual lines as needed. Do bottom line first. */ | |
1265 | ||
502b9b64 JB |
1266 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1267 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 | 1268 | |
fd2e066a GV |
1269 | #ifdef HAVE_WINDOW_SYSTEM |
1270 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 1271 | { |
fd2e066a | 1272 | leftmost = downto = FRAME_INTERNAL_BORDER_WIDTH (f); |
502b9b64 | 1273 | if (desired_frame->enable[0]) |
4588ec20 | 1274 | { |
502b9b64 JB |
1275 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1276 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
fd2e066a | 1277 | = PIXEL_HEIGHT (f) - FRAME_INTERNAL_BORDER_WIDTH (f) |
448fd7c0 | 1278 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1279 | current_frame->top_left_x[0] = leftmost; |
1280 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1281 | } |
1282 | } | |
fd2e066a | 1283 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
1284 | |
1285 | /* Now update the rest of the lines. */ | |
502b9b64 | 1286 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1287 | { |
502b9b64 | 1288 | if (desired_frame->enable[i]) |
4588ec20 | 1289 | { |
b6a65ac2 | 1290 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1291 | { |
1292 | /* Flush out every so many lines. | |
1293 | Also flush out if likely to have more than 1k buffered | |
1294 | otherwise. I'm told that some telnet connections get | |
1295 | really screwed by more than 1k output at once. */ | |
1296 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1297 | if (outq > 900 | |
1298 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1299 | { | |
1300 | fflush (stdout); | |
1301 | if (preempt_count == 1) | |
1302 | { | |
a41f8bed JB |
1303 | #ifdef EMACS_OUTQSIZE |
1304 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1305 | /* Probably not a tty. Ignore the error and reset |
1306 | * the outq count. */ | |
1307 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1308 | #endif | |
1309 | outq *= 10; | |
d520f0d2 | 1310 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 1311 | sleep (outq / baud_rate); |
4588ec20 JB |
1312 | } |
1313 | } | |
1314 | if ((i - 1) % preempt_count == 0) | |
1315 | detect_input_pending (); | |
1316 | } | |
1317 | ||
502b9b64 | 1318 | update_line (f, i); |
fd2e066a GV |
1319 | #ifdef HAVE_WINDOW_SYSTEM |
1320 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 1321 | { |
502b9b64 JB |
1322 | current_frame->top_left_y[i] = downto; |
1323 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 | 1324 | } |
fd2e066a | 1325 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
1326 | } |
1327 | ||
fd2e066a GV |
1328 | #ifdef HAVE_WINDOW_SYSTEM |
1329 | if (FRAME_WINDOW_P (f)) | |
448fd7c0 | 1330 | downto += current_frame->pix_height[i]; |
fd2e066a | 1331 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 1332 | } |
502b9b64 | 1333 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1334 | |
1335 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1336 | if (!pause) | |
1337 | { | |
48cf7030 | 1338 | if ((cursor_in_echo_area |
2577053b RS |
1339 | /* If we are showing a message instead of the minibuffer, |
1340 | show the cursor for the message instead of for the | |
1341 | (now hidden) minibuffer contents. */ | |
1342 | || (EQ (minibuf_window, selected_window) | |
1343 | && EQ (minibuf_window, echo_area_window) | |
1344 | && echo_area_glyphs != 0)) | |
1345 | /* These cases apply only to the frame that contains | |
1346 | the active minibuffer window. */ | |
1347 | && FRAME_HAS_MINIBUF_P (f) | |
140f8645 | 1348 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 1349 | { |
648fa17d JB |
1350 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1351 | int row, col; | |
1352 | ||
1353 | if (cursor_in_echo_area < 0) | |
1354 | { | |
1355 | row = top; | |
1356 | col = 0; | |
1357 | } | |
1113d9db | 1358 | else |
648fa17d JB |
1359 | { |
1360 | /* If the minibuffer is several lines high, find the last | |
1361 | line that has any text on it. */ | |
1362 | row = FRAME_HEIGHT (f); | |
1363 | do | |
1364 | { | |
1365 | row--; | |
1366 | if (current_frame->enable[row]) | |
1367 | col = current_frame->used[row]; | |
1368 | else | |
1369 | col = 0; | |
1370 | } | |
1371 | while (row > top && col == 0); | |
1372 | ||
1373 | if (col >= FRAME_WIDTH (f)) | |
1374 | { | |
1375 | col = 0; | |
1376 | if (row < FRAME_HEIGHT (f) - 1) | |
1377 | row++; | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | cursor_to (row, col); | |
1113d9db | 1382 | } |
4588ec20 | 1383 | else |
502b9b64 JB |
1384 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1385 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1386 | } |
1387 | ||
502b9b64 | 1388 | update_end (f); |
4588ec20 JB |
1389 | |
1390 | if (termscript) | |
1391 | fflush (termscript); | |
1392 | fflush (stdout); | |
1393 | ||
1394 | /* Here if output is preempted because input is detected. */ | |
1395 | do_pause: | |
1396 | ||
502b9b64 | 1397 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1398 | display_completed = !pause; |
1399 | ||
f5843453 | 1400 | bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1401 | return pause; |
1402 | } | |
1403 | ||
1404 | /* Called when about to quit, to check for doing so | |
1405 | at an improper time. */ | |
1406 | ||
1407 | void | |
1408 | quit_error_check () | |
1409 | { | |
1c78509b | 1410 | #if 0 |
502b9b64 | 1411 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1412 | return; |
502b9b64 | 1413 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1414 | abort (); |
502b9b64 | 1415 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 | 1416 | abort (); |
1c78509b | 1417 | #endif |
4588ec20 JB |
1418 | } |
1419 | \f | |
1420 | /* Decide what insert/delete line to do, and do it */ | |
1421 | ||
1422 | extern void scrolling_1 (); | |
1423 | ||
502b9b64 JB |
1424 | scrolling (frame) |
1425 | FRAME_PTR frame; | |
4588ec20 JB |
1426 | { |
1427 | int unchanged_at_top, unchanged_at_bottom; | |
1428 | int window_size; | |
1429 | int changed_lines; | |
502b9b64 JB |
1430 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1431 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1432 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
190bb91a | 1433 | int *old_draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
4588ec20 | 1434 | register int i; |
502b9b64 JB |
1435 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1436 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1437 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1438 | |
1439 | /* Compute hash codes of all the lines. | |
1440 | Also calculate number of changed lines, | |
1441 | number of unchanged lines at the beginning, | |
1442 | and number of unchanged lines at the end. */ | |
1443 | ||
1444 | changed_lines = 0; | |
1445 | unchanged_at_top = 0; | |
502b9b64 JB |
1446 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1447 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1448 | { |
1449 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1450 | if (!current_frame->enable[i]) |
4588ec20 | 1451 | return 0; |
502b9b64 JB |
1452 | old_hash[i] = line_hash_code (current_frame, i); |
1453 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1454 | new_hash[i] = old_hash[i]; |
1455 | else | |
502b9b64 | 1456 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1457 | |
1458 | if (old_hash[i] != new_hash[i]) | |
1459 | { | |
1460 | changed_lines++; | |
502b9b64 | 1461 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1462 | } |
1463 | else if (i == unchanged_at_top) | |
1464 | unchanged_at_top++; | |
502b9b64 | 1465 | draw_cost[i] = line_draw_cost (desired_frame, i); |
190bb91a | 1466 | old_draw_cost[i] = line_draw_cost (current_frame, i); |
4588ec20 JB |
1467 | } |
1468 | ||
1469 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
190bb91a | 1470 | if (!scroll_region_ok && changed_lines < baud_rate / 2400 |
502b9b64 | 1471 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1472 | return 1; |
1473 | ||
502b9b64 | 1474 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1475 | - unchanged_at_bottom); |
1476 | ||
1477 | if (scroll_region_ok) | |
1478 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1479 | else if (memory_below_frame) |
4588ec20 JB |
1480 | free_at_end_vpos = -1; |
1481 | ||
1482 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1483 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 1484 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
1485 | && (window_size >= |
1486 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1487 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1488 | old_hash, new_hash, draw_cost))) |
1489 | return 0; | |
1490 | ||
502b9b64 | 1491 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 1492 | draw_cost + unchanged_at_top - 1, |
190bb91a | 1493 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
1494 | old_hash + unchanged_at_top - 1, |
1495 | new_hash + unchanged_at_top - 1, | |
1496 | free_at_end_vpos - unchanged_at_top); | |
1497 | ||
1498 | return 0; | |
1499 | } | |
1500 | \f | |
1501 | /* Return the offset in its buffer of the character at location col, line | |
1502 | in the given window. */ | |
1503 | int | |
1504 | buffer_posn_from_coords (window, col, line) | |
1505 | struct window *window; | |
1506 | int col, line; | |
1507 | { | |
ef0fdbb1 | 1508 | int hscroll = XINT (window->hscroll); |
4588ec20 JB |
1509 | int window_left = XFASTINT (window->left); |
1510 | ||
1511 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1512 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1513 | window. */ | |
fa61c701 | 1514 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1515 | |
efb859b4 | 1516 | int startp = marker_position (window->start); |
4588ec20 JB |
1517 | |
1518 | /* Since compute_motion will only operate on the current buffer, | |
1519 | we need to save the old one and restore it when we're done. */ | |
1520 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1521 | struct position *posn; |
4588ec20 JB |
1522 | |
1523 | current_buffer = XBUFFER (window->buffer); | |
1524 | ||
2ba9ed58 KH |
1525 | /* We can't get a correct result in this case, |
1526 | but at least prevent compute_motion from crashing. */ | |
1527 | if (startp < BEGV) | |
1528 | startp = BEGV; | |
1529 | ||
502b9b64 JB |
1530 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1531 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1532 | the window, but it isn't maintained correctly, and I'm not even |
1533 | sure I will keep it. */ | |
1534 | posn = compute_motion (startp, 0, | |
94129385 KH |
1535 | ((window == XWINDOW (minibuf_window) && startp == BEG |
1536 | ? minibuf_prompt_width : 0) | |
1537 | + (hscroll ? 1 - hscroll : 0)), | |
1538 | 0, | |
fb0f454a | 1539 | ZV, line, col, |
e37f06d7 | 1540 | window_width, hscroll, 0, window); |
4588ec20 JB |
1541 | |
1542 | current_buffer = old_current_buffer; | |
1543 | ||
502b9b64 | 1544 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1545 | to be *after* the newline, i.e. at the start of the next line. |
1546 | This is reasonable, but not really what we want. So if the | |
1547 | result is on a line below LINE, back it up one character. */ | |
1548 | if (posn->vpos > line) | |
1549 | return posn->bufpos - 1; | |
1550 | else | |
1551 | return posn->bufpos; | |
4588ec20 JB |
1552 | } |
1553 | \f | |
1554 | static int | |
1555 | count_blanks (r) | |
1556 | register GLYPH *r; | |
1557 | { | |
1558 | register GLYPH *p = r; | |
94aa5d2d RS |
1559 | while (*p++ == SPACEGLYPH); |
1560 | return p - r - 1; | |
4588ec20 JB |
1561 | } |
1562 | ||
1563 | static int | |
1564 | count_match (str1, str2) | |
1565 | GLYPH *str1, *str2; | |
1566 | { | |
1567 | register GLYPH *p1 = str1; | |
1568 | register GLYPH *p2 = str2; | |
1569 | while (*p1++ == *p2++); | |
1570 | return p1 - str1 - 1; | |
1571 | } | |
1572 | ||
1573 | /* Char insertion/deletion cost vector, from term.c */ | |
1574 | extern int *char_ins_del_vector; | |
1575 | ||
945807a3 | 1576 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1577 | |
1578 | static void | |
502b9b64 JB |
1579 | update_line (frame, vpos) |
1580 | register FRAME_PTR frame; | |
4588ec20 JB |
1581 | int vpos; |
1582 | { | |
1583 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
60a8948a | 1584 | int *temp1; |
4588ec20 JB |
1585 | int tem; |
1586 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1587 | int save; | |
502b9b64 JB |
1588 | register struct frame_glyphs *current_frame |
1589 | = FRAME_CURRENT_GLYPHS (frame); | |
1590 | register struct frame_glyphs *desired_frame | |
1591 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1592 | |
502b9b64 JB |
1593 | if (desired_frame->highlight[vpos] |
1594 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1595 | { |
502b9b64 JB |
1596 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1597 | (current_frame->enable[vpos] ? | |
1598 | current_frame->used[vpos] : 0)); | |
1599 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1600 | } |
1601 | else | |
502b9b64 | 1602 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1603 | |
502b9b64 | 1604 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1605 | { |
1606 | olen = 0; | |
1607 | } | |
1608 | else | |
1609 | { | |
502b9b64 JB |
1610 | obody = current_frame->glyphs[vpos]; |
1611 | olen = current_frame->used[vpos]; | |
1612 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1613 | { |
1614 | if (!must_write_spaces) | |
ed874011 | 1615 | while (olen > 0 && obody[olen - 1] == SPACEGLYPH) |
4588ec20 JB |
1616 | olen--; |
1617 | } | |
1618 | else | |
1619 | { | |
1620 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1621 | spaces all the way to the frame edge |
4588ec20 JB |
1622 | so that the reverse video extends all the way across. */ |
1623 | ||
502b9b64 | 1624 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1625 | obody[olen++] = SPACEGLYPH; |
1626 | } | |
1627 | } | |
1628 | ||
1629 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1630 | current_frame->enable[vpos] = 1; |
1631 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1632 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1633 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 | 1634 | |
fd2e066a GV |
1635 | #ifdef HAVE_WINDOW_SYSTEM |
1636 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 1637 | { |
502b9b64 JB |
1638 | current_frame->pix_width[vpos] |
1639 | = current_frame->used[vpos] | |
fd2e066a | 1640 | * FONT_WIDTH (FRAME_FONT (frame)); |
502b9b64 | 1641 | current_frame->pix_height[vpos] |
fd2e066a | 1642 | = FRAME_LINE_HEIGHT (frame); |
4588ec20 | 1643 | } |
fd2e066a | 1644 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 1645 | |
502b9b64 | 1646 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1647 | { |
1648 | nlen = 0; | |
1649 | goto just_erase; | |
1650 | } | |
1651 | ||
502b9b64 JB |
1652 | nbody = desired_frame->glyphs[vpos]; |
1653 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1654 | |
1655 | /* Pretend trailing spaces are not there at all, | |
1656 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1657 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1658 | { |
1659 | if (!must_write_spaces) | |
1660 | /* We know that the previous character byte contains 0. */ | |
1661 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1662 | nlen--; | |
1663 | } | |
1664 | else | |
1665 | { | |
1666 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1667 | all the way to the frame edge |
4588ec20 JB |
1668 | so that the reverse video extends all the way across. */ |
1669 | ||
502b9b64 | 1670 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1671 | nbody[nlen++] = SPACEGLYPH; |
1672 | } | |
1673 | ||
1674 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1675 | if (!char_ins_del_ok) | |
1676 | { | |
1677 | int i,j; | |
1678 | ||
76426794 RS |
1679 | #if 0 |
1680 | if (FRAME_X_P (frame)) | |
1681 | { | |
1682 | /* Under X, erase everything we are going to rewrite, | |
1683 | and rewrite everything from the first char that's changed. | |
1684 | This is part of supporting fonts like Courier | |
1685 | whose chars can overlap outside the char width. */ | |
1686 | for (i = 0; i < nlen; i++) | |
1687 | if (i >= olen || nbody[i] != obody[i]) | |
1688 | break; | |
1689 | ||
1690 | cursor_to (vpos, i); | |
1691 | if (i != olen) | |
1692 | clear_end_of_line (olen); | |
1693 | write_glyphs (nbody + i, nlen - i); | |
1694 | } | |
1695 | else | |
1696 | {} | |
1697 | #endif /* 0 */ | |
4588ec20 JB |
1698 | for (i = 0; i < nlen; i++) |
1699 | { | |
1700 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1701 | { | |
1702 | cursor_to (vpos, i); | |
1703 | for (j = 1; (i + j < nlen && | |
1704 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1705 | j++); | |
1706 | ||
1707 | /* Output this run of non-matching chars. */ | |
1708 | write_glyphs (nbody + i, j); | |
1709 | i += j - 1; | |
1710 | ||
1711 | /* Now find the next non-match. */ | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1716 | if (olen > nlen) | |
1717 | { | |
1718 | cursor_to (vpos, nlen); | |
1719 | clear_end_of_line (olen); | |
1720 | } | |
1721 | ||
502b9b64 JB |
1722 | /* Exchange contents between current_frame and new_frame. */ |
1723 | temp = desired_frame->glyphs[vpos]; | |
1724 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1725 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1726 | |
60a8948a RS |
1727 | /* Exchange charstarts between current_frame and new_frame. */ |
1728 | temp1 = desired_frame->charstarts[vpos]; | |
1729 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1730 | current_frame->charstarts[vpos] = temp1; | |
1731 | ||
4588ec20 JB |
1732 | return; |
1733 | } | |
1734 | ||
1735 | if (!olen) | |
1736 | { | |
502b9b64 | 1737 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1738 | ? 0 : count_blanks (nbody); |
1739 | if (nlen > nsp) | |
1740 | { | |
1741 | cursor_to (vpos, nsp); | |
1742 | write_glyphs (nbody + nsp, nlen - nsp); | |
1743 | } | |
1744 | ||
502b9b64 JB |
1745 | /* Exchange contents between current_frame and new_frame. */ |
1746 | temp = desired_frame->glyphs[vpos]; | |
1747 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1748 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1749 | |
60a8948a RS |
1750 | /* Exchange charstarts between current_frame and new_frame. */ |
1751 | temp1 = desired_frame->charstarts[vpos]; | |
1752 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1753 | current_frame->charstarts[vpos] = temp1; | |
1754 | ||
4588ec20 JB |
1755 | return; |
1756 | } | |
1757 | ||
1758 | obody[olen] = 1; | |
1759 | save = nbody[nlen]; | |
1760 | nbody[nlen] = 0; | |
1761 | ||
1762 | /* Compute number of leading blanks in old and new contents. */ | |
1763 | osp = count_blanks (obody); | |
502b9b64 | 1764 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1765 | nsp = count_blanks (nbody); |
1766 | else | |
1767 | nsp = 0; | |
1768 | ||
1769 | /* Compute number of matching chars starting with first nonblank. */ | |
1770 | begmatch = count_match (obody + osp, nbody + nsp); | |
1771 | ||
1772 | /* Spaces in new match implicit space past the end of old. */ | |
1773 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1774 | if (!must_write_spaces && osp + begmatch == olen) | |
1775 | { | |
1776 | np1 = nbody + nsp; | |
1777 | while (np1[begmatch] == SPACEGLYPH) | |
1778 | begmatch++; | |
1779 | } | |
1780 | ||
1781 | /* Avoid doing insert/delete char | |
1782 | just cause number of leading spaces differs | |
1783 | when the following text does not match. */ | |
1784 | if (begmatch == 0 && osp != nsp) | |
1785 | osp = nsp = min (osp, nsp); | |
1786 | ||
1787 | /* Find matching characters at end of line */ | |
1788 | op1 = obody + olen; | |
1789 | np1 = nbody + nlen; | |
1790 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1791 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1792 | { | |
1793 | op1--; | |
1794 | np1--; | |
1795 | } | |
1796 | endmatch = obody + olen - op1; | |
1797 | ||
1798 | /* Put correct value back in nbody[nlen]. | |
1799 | This is important because direct_output_for_insert | |
1800 | can write into the line at a later point. | |
1801 | If this screws up the zero at the end of the line, re-establish it. */ | |
1802 | nbody[nlen] = save; | |
1803 | obody[olen] = 0; | |
1804 | ||
1805 | /* tem gets the distance to insert or delete. | |
1806 | endmatch is how many characters we save by doing so. | |
1807 | Is it worth it? */ | |
1808 | ||
1809 | tem = (nlen - nsp) - (olen - osp); | |
1810 | if (endmatch && tem | |
502b9b64 | 1811 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1812 | endmatch = 0; |
1813 | ||
1814 | /* nsp - osp is the distance to insert or delete. | |
1815 | If that is nonzero, begmatch is known to be nonzero also. | |
1816 | begmatch + endmatch is how much we save by doing the ins/del. | |
1817 | Is it worth it? */ | |
1818 | ||
1819 | if (nsp != osp | |
1820 | && (!char_ins_del_ok | |
502b9b64 | 1821 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1822 | { |
1823 | begmatch = 0; | |
1824 | endmatch = 0; | |
1825 | osp = nsp = min (osp, nsp); | |
1826 | } | |
1827 | ||
1828 | /* Now go through the line, inserting, writing and | |
1829 | deleting as appropriate. */ | |
1830 | ||
1831 | if (osp > nsp) | |
1832 | { | |
1833 | cursor_to (vpos, nsp); | |
1834 | delete_glyphs (osp - nsp); | |
1835 | } | |
1836 | else if (nsp > osp) | |
1837 | { | |
1838 | /* If going to delete chars later in line | |
1839 | and insert earlier in the line, | |
1840 | must delete first to avoid losing data in the insert */ | |
1841 | if (endmatch && nlen < olen + nsp - osp) | |
1842 | { | |
1843 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1844 | delete_glyphs (olen + nsp - osp - nlen); | |
1845 | olen = nlen - (nsp - osp); | |
1846 | } | |
1847 | cursor_to (vpos, osp); | |
1848 | insert_glyphs ((char *)0, nsp - osp); | |
1849 | } | |
1850 | olen += nsp - osp; | |
1851 | ||
1852 | tem = nsp + begmatch + endmatch; | |
1853 | if (nlen != tem || olen != tem) | |
1854 | { | |
1855 | cursor_to (vpos, nsp + begmatch); | |
1856 | if (!endmatch || nlen == olen) | |
1857 | { | |
1858 | /* If new text being written reaches right margin, | |
1859 | there is no need to do clear-to-eol at the end. | |
1860 | (and it would not be safe, since cursor is not | |
1861 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1862 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1863 | olen = 0; |
1864 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1865 | ||
1866 | #ifdef obsolete | |
1867 | ||
1868 | /* the following code loses disastrously if tem == nlen. | |
1869 | Rather than trying to fix that case, I am trying the simpler | |
1870 | solution found above. */ | |
1871 | ||
1872 | /* If the text reaches to the right margin, | |
1873 | it will lose one way or another (depending on AutoWrap) | |
1874 | to clear to end of line after outputting all the text. | |
1875 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1876 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1877 | { |
1878 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1879 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1880 | clear_end_of_line (olen); | |
1881 | olen = 0; /* Don't let it be cleared again later */ | |
1882 | write_glyphs (nbody + nlen - 1, 1); | |
1883 | } | |
1884 | else | |
1885 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1886 | #endif /* OBSOLETE */ | |
1887 | ||
1888 | } | |
1889 | else if (nlen > olen) | |
1890 | { | |
1891 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1892 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1893 | olen = nlen; | |
1894 | } | |
1895 | else if (olen > nlen) | |
1896 | { | |
1897 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1898 | delete_glyphs (olen - nlen); | |
1899 | olen = nlen; | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | just_erase: | |
1904 | /* If any unerased characters remain after the new line, erase them. */ | |
1905 | if (olen > nlen) | |
1906 | { | |
1907 | cursor_to (vpos, nlen); | |
1908 | clear_end_of_line (olen); | |
1909 | } | |
1910 | ||
502b9b64 JB |
1911 | /* Exchange contents between current_frame and new_frame. */ |
1912 | temp = desired_frame->glyphs[vpos]; | |
1913 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1914 | current_frame->glyphs[vpos] = temp; | |
60a8948a RS |
1915 | |
1916 | /* Exchange charstarts between current_frame and new_frame. */ | |
1917 | temp1 = desired_frame->charstarts[vpos]; | |
1918 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1919 | current_frame->charstarts[vpos] = temp1; | |
4588ec20 JB |
1920 | } |
1921 | \f | |
6f7bbf79 KH |
1922 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the |
1923 | session's frames, frame names, buffers, buffer-read-only flags, and | |
1924 | buffer-modified-flags, and a trailing sentinel (so we don't need to | |
1925 | add length checks). */ | |
078b3696 KH |
1926 | static Lisp_Object frame_and_buffer_state; |
1927 | ||
1928 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
1929 | Sframe_or_buffer_changed_p, 0, 0, 0, | |
1930 | "Return non-nil if the frame and buffer state appears to have changed.\n\ | |
1931 | The state variable is an internal vector containing all frames and buffers,\n\ | |
836d2cde | 1932 | aside from buffers whose names start with space,\n\ |
078b3696 KH |
1933 | along with the buffers' read-only and modified flags, which allows a fast\n\ |
1934 | check to see whether the menu bars might need to be recomputed.\n\ | |
1935 | If this function returns non-nil, it updates the internal vector to reflect\n\ | |
1936 | the current state.\n") | |
1937 | () | |
1938 | { | |
1939 | Lisp_Object tail, frame, buf; | |
1940 | Lisp_Object *vecp; | |
1941 | int n; | |
bd9e3e75 | 1942 | |
078b3696 KH |
1943 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1944 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1945 | { |
1946 | if (!EQ (*vecp++, frame)) | |
1947 | goto changed; | |
1948 | if (!EQ (*vecp++, XFRAME (frame)->name)) | |
1949 | goto changed; | |
1950 | } | |
50cf83f8 RS |
1951 | /* Check that the buffer info matches. |
1952 | No need to test for the end of the vector | |
1953 | because the last element of the vector is lambda | |
1954 | and that will always cause a mismatch. */ | |
078b3696 KH |
1955 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1956 | { | |
1957 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1958 | /* Ignore buffers that aren't included in buffer lists. */ |
1959 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1960 | continue; | |
078b3696 KH |
1961 | if (!EQ (*vecp++, buf)) |
1962 | goto changed; | |
1963 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
1964 | goto changed; | |
1965 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
1966 | goto changed; | |
1967 | } | |
50cf83f8 RS |
1968 | /* Detect deletion of a buffer at the end of the list. */ |
1969 | if (*vecp == Qlambda) | |
1970 | return Qnil; | |
078b3696 | 1971 | changed: |
5dad8282 | 1972 | /* Start with 1 so there is room for at least one lambda at the end. */ |
078b3696 KH |
1973 | n = 1; |
1974 | FOR_EACH_FRAME (tail, frame) | |
d1dad759 | 1975 | n += 2; |
078b3696 KH |
1976 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1977 | n += 3; | |
267ad509 KH |
1978 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ |
1979 | if (n > XVECTOR (frame_and_buffer_state)->size | |
d1dad759 KH |
1980 | || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) |
1981 | /* Add 20 extra so we grow it less often. */ | |
1982 | frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); | |
078b3696 KH |
1983 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1984 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1985 | { |
1986 | *vecp++ = frame; | |
1987 | *vecp++ = XFRAME (frame)->name; | |
1988 | } | |
078b3696 KH |
1989 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1990 | { | |
1991 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1992 | /* Ignore buffers that aren't included in buffer lists. */ |
1993 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1994 | continue; | |
078b3696 KH |
1995 | *vecp++ = buf; |
1996 | *vecp++ = XBUFFER (buf)->read_only; | |
1997 | *vecp++ = Fbuffer_modified_p (buf); | |
1998 | } | |
d1dad759 KH |
1999 | /* Fill up the vector with lambdas (always at least one). */ |
2000 | *vecp++ = Qlambda; | |
2001 | while (vecp - XVECTOR (frame_and_buffer_state)->contents | |
2002 | < XVECTOR (frame_and_buffer_state)->size) | |
267ad509 | 2003 | *vecp++ = Qlambda; |
d1dad759 KH |
2004 | /* Make sure we didn't overflow the vector. */ |
2005 | if (vecp - XVECTOR (frame_and_buffer_state)->contents | |
2006 | > XVECTOR (frame_and_buffer_state)->size) | |
2007 | abort (); | |
078b3696 KH |
2008 | return Qt; |
2009 | } | |
2010 | \f | |
4588ec20 JB |
2011 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
2012 | 1, 1, "FOpen termscript file: ", | |
2013 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
2014 | FILE = nil means just close any termscript file currently open.") | |
2015 | (file) | |
2016 | Lisp_Object file; | |
2017 | { | |
2018 | if (termscript != 0) fclose (termscript); | |
2019 | termscript = 0; | |
2020 | ||
efb859b4 | 2021 | if (! NILP (file)) |
4588ec20 JB |
2022 | { |
2023 | file = Fexpand_file_name (file, Qnil); | |
2024 | termscript = fopen (XSTRING (file)->data, "w"); | |
2025 | if (termscript == 0) | |
2026 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
2027 | } | |
2028 | return Qnil; | |
2029 | } | |
2030 | \f | |
2031 | ||
2032 | #ifdef SIGWINCH | |
efb859b4 | 2033 | SIGTYPE |
61cbef47 RS |
2034 | window_change_signal (signalnum) /* If we don't have an argument, */ |
2035 | int signalnum; /* some compilers complain in signal calls. */ | |
4588ec20 JB |
2036 | { |
2037 | int width, height; | |
2038 | extern int errno; | |
2039 | int old_errno = errno; | |
2040 | ||
502b9b64 | 2041 | get_frame_size (&width, &height); |
4588ec20 | 2042 | |
502b9b64 JB |
2043 | /* The frame size change obviously applies to a termcap-controlled |
2044 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 2045 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 2046 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
2047 | but don't reallocate the data structures now. Let that be done |
2048 | later outside of the signal handler. */ | |
2049 | ||
2050 | { | |
35f56f96 | 2051 | Lisp_Object tail, frame; |
4588ec20 | 2052 | |
35f56f96 | 2053 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2054 | { |
35f56f96 | 2055 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 2056 | { |
35f56f96 | 2057 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
2058 | break; |
2059 | } | |
2060 | } | |
2061 | } | |
2062 | ||
2063 | signal (SIGWINCH, window_change_signal); | |
2064 | errno = old_errno; | |
2065 | } | |
2066 | #endif /* SIGWINCH */ | |
2067 | ||
2068 | ||
502b9b64 | 2069 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
2070 | |
2071 | do_pending_window_change () | |
2072 | { | |
2073 | /* If window_change_signal should have run before, run it now. */ | |
2074 | while (delayed_size_change) | |
2075 | { | |
35f56f96 | 2076 | Lisp_Object tail, frame; |
4588ec20 JB |
2077 | |
2078 | delayed_size_change = 0; | |
2079 | ||
35f56f96 | 2080 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2081 | { |
35f56f96 JB |
2082 | FRAME_PTR f = XFRAME (frame); |
2083 | ||
502b9b64 JB |
2084 | int height = FRAME_NEW_HEIGHT (f); |
2085 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 2086 | |
08f7aa3e | 2087 | if (height != 0 || width != 0) |
b6a65ac2 | 2088 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
2089 | } |
2090 | } | |
2091 | } | |
2092 | ||
2093 | ||
502b9b64 | 2094 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 2095 | indicate no change is to take place. |
4588ec20 | 2096 | |
b6a65ac2 JB |
2097 | If DELAY is non-zero, then assume we're being called from a signal |
2098 | handler, and queue the change for later - perhaps the next | |
2099 | redisplay. Since this tries to resize windows, we can't call it | |
2100 | from a signal handler. */ | |
2101 | ||
45140e01 RS |
2102 | change_frame_size (f, newheight, newwidth, pretend, delay) |
2103 | register FRAME_PTR f; | |
2104 | int newheight, newwidth, pretend; | |
2105 | { | |
2106 | Lisp_Object tail, frame; | |
8a376b3b | 2107 | if (! FRAME_WINDOW_P (f)) |
45140e01 | 2108 | { |
93e54836 RS |
2109 | /* When using termcap, or on MS-DOS, all frames use |
2110 | the same screen, so a change in size affects all frames. */ | |
45140e01 | 2111 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 2112 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 RS |
2113 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
2114 | pretend, delay); | |
2115 | } | |
2116 | else | |
2117 | change_frame_size_1 (f, newheight, newwidth, pretend, delay); | |
2118 | } | |
2119 | ||
2120 | static void | |
2121 | change_frame_size_1 (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 2122 | register FRAME_PTR frame; |
a1d789d0 | 2123 | int newheight, newwidth, pretend, delay; |
4588ec20 JB |
2124 | { |
2125 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 2126 | if (delay) |
4588ec20 | 2127 | { |
b6a65ac2 | 2128 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 2129 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
2130 | delayed_size_change = 1; |
2131 | return; | |
2132 | } | |
2133 | ||
502b9b64 JB |
2134 | /* This size-change overrides any pending one for this frame. */ |
2135 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
2136 | FRAME_NEW_WIDTH (frame) = 0; |
2137 | ||
08f7aa3e | 2138 | /* If an argument is zero, set it to the current value. */ |
b6a65ac2 JB |
2139 | newheight || (newheight = FRAME_HEIGHT (frame)); |
2140 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 2141 | |
b6a65ac2 JB |
2142 | /* Round up to the smallest acceptable size. */ |
2143 | check_frame_size (frame, &newheight, &newwidth); | |
2144 | ||
2145 | /* If we're not changing the frame size, quit now. */ | |
2146 | if (newheight == FRAME_HEIGHT (frame) | |
2147 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
2148 | return; |
2149 | ||
cbb95688 RS |
2150 | BLOCK_INPUT; |
2151 | ||
886a8a6c KH |
2152 | #ifdef MSDOS |
2153 | /* We only can set screen dimensions to certain values supported | |
2154 | by our video hardware. Try to find the smallest size greater | |
2155 | or equal to the requested dimensions. */ | |
2156 | dos_set_window_size (&newheight, &newwidth); | |
2157 | #endif | |
2158 | ||
b6a65ac2 | 2159 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 2160 | { |
b6a65ac2 | 2161 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 2162 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 2163 | { |
502b9b64 JB |
2164 | /* Frame has both root and minibuffer. */ |
2165 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 2166 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
a5d8b611 KH |
2167 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top, |
2168 | newheight - 1); | |
502b9b64 | 2169 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
2170 | } |
2171 | else | |
502b9b64 | 2172 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
2173 | set_window_height (FRAME_ROOT_WINDOW (frame), |
2174 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
2175 | |
2176 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
2177 | FrameRows = newheight; | |
4588ec20 JB |
2178 | |
2179 | #if 0 | |
502b9b64 | 2180 | if (frame->output_method == output_termcap) |
4588ec20 | 2181 | { |
b6a65ac2 | 2182 | frame_height = newheight; |
4588ec20 | 2183 | if (!pretend) |
b6a65ac2 | 2184 | FrameRows = newheight; |
4588ec20 JB |
2185 | } |
2186 | #endif | |
2187 | } | |
2188 | ||
b6a65ac2 | 2189 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 2190 | { |
502b9b64 | 2191 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 2192 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 2193 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 2194 | |
b6a65ac2 | 2195 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 2196 | FrameCols = newwidth; |
4588ec20 | 2197 | #if 0 |
502b9b64 | 2198 | if (frame->output_method == output_termcap) |
4588ec20 | 2199 | { |
502b9b64 | 2200 | frame_width = newwidth; |
4588ec20 | 2201 | if (!pretend) |
502b9b64 | 2202 | FrameCols = newwidth; |
4588ec20 JB |
2203 | } |
2204 | #endif | |
2205 | } | |
2206 | ||
b6a65ac2 JB |
2207 | FRAME_HEIGHT (frame) = newheight; |
2208 | FRAME_WIDTH (frame) = newwidth; | |
986e61b8 RS |
2209 | |
2210 | if (FRAME_CURSOR_X (frame) >= FRAME_WIDTH (frame)) | |
2211 | FRAME_CURSOR_X (frame) = FRAME_WIDTH (frame) - 1; | |
2212 | if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) | |
2213 | FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; | |
2214 | ||
502b9b64 JB |
2215 | remake_frame_glyphs (frame); |
2216 | calculate_costs (frame); | |
97cf50e7 RS |
2217 | |
2218 | UNBLOCK_INPUT; | |
4588ec20 JB |
2219 | } |
2220 | \f | |
2221 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
2222 | Ssend_string_to_terminal, 1, 1, 0, | |
2223 | "Send STRING to the terminal without alteration.\n\ | |
2224 | Control characters in STRING will have terminal-dependent effects.") | |
e912ba09 EN |
2225 | (string) |
2226 | Lisp_Object string; | |
4588ec20 | 2227 | { |
e912ba09 EN |
2228 | CHECK_STRING (string, 0); |
2229 | fwrite (XSTRING (string)->data, 1, XSTRING (string)->size, stdout); | |
4588ec20 JB |
2230 | fflush (stdout); |
2231 | if (termscript) | |
2232 | { | |
e912ba09 | 2233 | fwrite (XSTRING (string)->data, 1, XSTRING (string)->size, termscript); |
4588ec20 JB |
2234 | fflush (termscript); |
2235 | } | |
2236 | return Qnil; | |
2237 | } | |
2238 | ||
2239 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
2240 | "Beep, or flash the screen.\n\ | |
2241 | Also, unless an argument is given,\n\ | |
2242 | terminate any keyboard macro currently executing.") | |
2243 | (arg) | |
2244 | Lisp_Object arg; | |
2245 | { | |
efb859b4 | 2246 | if (!NILP (arg)) |
4588ec20 | 2247 | { |
7fa788da RS |
2248 | if (noninteractive) |
2249 | putchar (07); | |
2250 | else | |
2251 | ring_bell (); | |
4588ec20 JB |
2252 | fflush (stdout); |
2253 | } | |
2254 | else | |
2255 | bitch_at_user (); | |
2256 | ||
2257 | return Qnil; | |
2258 | } | |
2259 | ||
2260 | bitch_at_user () | |
2261 | { | |
2262 | if (noninteractive) | |
2263 | putchar (07); | |
2264 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
2265 | error ("Keyboard macro terminated by a command ringing the bell"); | |
2266 | else | |
2267 | ring_bell (); | |
2268 | fflush (stdout); | |
2269 | } | |
2270 | ||
2271 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 2272 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
2273 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2274 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2275 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2276 | Emacs was built without floating point support.\n\ | |
2277 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
2278 | (seconds, milliseconds) |
2279 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 2280 | { |
767229f8 | 2281 | int sec, usec; |
4588ec20 | 2282 | |
767229f8 | 2283 | if (NILP (milliseconds)) |
e9c9a718 | 2284 | XSETINT (milliseconds, 0); |
767229f8 JB |
2285 | else |
2286 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2287 | usec = XINT (milliseconds) * 1000; |
2288 | ||
2289 | #ifdef LISP_FLOAT_TYPE | |
2290 | { | |
2291 | double duration = extract_float (seconds); | |
2292 | sec = (int) duration; | |
2293 | usec += (duration - sec) * 1000000; | |
2294 | } | |
2295 | #else | |
2296 | CHECK_NUMBER (seconds, 0); | |
2297 | sec = XINT (seconds); | |
2298 | #endif | |
4588ec20 | 2299 | |
a41f8bed | 2300 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2301 | if (sec == 0 && usec != 0) |
2302 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 2303 | #endif |
767229f8 JB |
2304 | |
2305 | /* Assure that 0 <= usec < 1000000. */ | |
2306 | if (usec < 0) | |
2307 | { | |
2308 | /* We can't rely on the rounding being correct if user is negative. */ | |
2309 | if (-1000000 < usec) | |
2310 | sec--, usec += 1000000; | |
2311 | else | |
2312 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 2313 | } |
767229f8 JB |
2314 | else |
2315 | sec += usec / 1000000, usec %= 1000000; | |
2316 | ||
6b5153b1 | 2317 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 2318 | return Qnil; |
4588ec20 | 2319 | |
f76475ad JB |
2320 | { |
2321 | Lisp_Object zero; | |
2322 | ||
a5d8b611 | 2323 | XSETFASTINT (zero, 0); |
f76475ad JB |
2324 | wait_reading_process_input (sec, usec, zero, 0); |
2325 | } | |
d1af74e9 | 2326 | |
767229f8 JB |
2327 | /* We should always have wait_reading_process_input; we have a dummy |
2328 | implementation for systems which don't support subprocesses. */ | |
2329 | #if 0 | |
2330 | /* No wait_reading_process_input */ | |
4588ec20 JB |
2331 | immediate_quit = 1; |
2332 | QUIT; | |
2333 | ||
2334 | #ifdef VMS | |
2335 | sys_sleep (sec); | |
2336 | #else /* not VMS */ | |
2337 | /* The reason this is done this way | |
2338 | (rather than defined (H_S) && defined (H_T)) | |
2339 | is because the VMS preprocessor doesn't grok `defined' */ | |
2340 | #ifdef HAVE_SELECT | |
a41f8bed JB |
2341 | EMACS_GET_TIME (end_time); |
2342 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 2343 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 2344 | |
4588ec20 JB |
2345 | while (1) |
2346 | { | |
a41f8bed JB |
2347 | EMACS_GET_TIME (timeout); |
2348 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2349 | if (EMACS_TIME_NEG_P (timeout) | |
2350 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
2351 | break; |
2352 | } | |
4588ec20 JB |
2353 | #else /* not HAVE_SELECT */ |
2354 | sleep (sec); | |
2355 | #endif /* HAVE_SELECT */ | |
2356 | #endif /* not VMS */ | |
2357 | ||
2358 | immediate_quit = 0; | |
2359 | #endif /* no subprocesses */ | |
2360 | ||
2361 | return Qnil; | |
2362 | } | |
2363 | ||
f76475ad JB |
2364 | /* This is just like wait_reading_process_input, except that |
2365 | it does the redisplay. | |
2366 | ||
ea0d86af | 2367 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 2368 | waiting for input as well. */ |
4588ec20 | 2369 | |
f76475ad JB |
2370 | Lisp_Object |
2371 | sit_for (sec, usec, reading, display) | |
2372 | int sec, usec, reading, display; | |
2373 | { | |
2374 | Lisp_Object read_kbd; | |
4588ec20 | 2375 | |
ccddf474 RS |
2376 | swallow_events (display); |
2377 | ||
f80bd2d7 | 2378 | if (detect_input_pending_run_timers (display)) |
4588ec20 | 2379 | return Qnil; |
4588ec20 | 2380 | |
f76475ad JB |
2381 | if (display) |
2382 | redisplay_preserve_echo_area (); | |
4588ec20 | 2383 | |
dfdb645c JB |
2384 | if (sec == 0 && usec == 0) |
2385 | return Qt; | |
2386 | ||
4588ec20 | 2387 | #ifdef SIGIO |
8fc798e9 | 2388 | gobble_input (0); |
f76475ad JB |
2389 | #endif |
2390 | ||
e9c9a718 | 2391 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
2392 | wait_reading_process_input (sec, usec, read_kbd, display); |
2393 | ||
d1af74e9 | 2394 | |
500ab754 JB |
2395 | /* wait_reading_process_input should always be available now; it is |
2396 | simulated in a simple way on systems that don't support | |
2397 | subprocesses. */ | |
2398 | #if 0 | |
2399 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
2400 | immediate_quit = 1; |
2401 | QUIT; | |
2402 | ||
2403 | waitchannels = 1; | |
2404 | #ifdef VMS | |
f76475ad | 2405 | input_wait_timeout (XINT (arg)); |
4588ec20 | 2406 | #else /* not VMS */ |
d1af74e9 JB |
2407 | #ifndef HAVE_TIMEVAL |
2408 | timeout_sec = sec; | |
2409 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
2410 | #else /* HAVE_TIMEVAL */ | |
2411 | timeout.tv_sec = sec; | |
2412 | timeout.tv_usec = usec; | |
4588ec20 | 2413 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 2414 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
2415 | #endif /* not VMS */ |
2416 | ||
2417 | immediate_quit = 0; | |
d1af74e9 | 2418 | #endif |
4588ec20 JB |
2419 | |
2420 | return detect_input_pending () ? Qnil : Qt; | |
2421 | } | |
2422 | ||
f76475ad | 2423 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2424 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2425 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2426 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2427 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2428 | Emacs was built without floating point support.\n\ | |
2429 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
e912ba09 | 2430 | Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\ |
f76475ad JB |
2431 | Redisplay is preempted as always if input arrives, and does not happen\n\ |
2432 | if input is available before it starts.\n\ | |
2433 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2434 | (seconds, milliseconds, nodisp) |
2435 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2436 | { |
767229f8 | 2437 | int sec, usec; |
f76475ad | 2438 | |
767229f8 | 2439 | if (NILP (milliseconds)) |
e9c9a718 | 2440 | XSETINT (milliseconds, 0); |
767229f8 JB |
2441 | else |
2442 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2443 | usec = XINT (milliseconds) * 1000; |
2444 | ||
2445 | #ifdef LISP_FLOAT_TYPE | |
2446 | { | |
2447 | double duration = extract_float (seconds); | |
2448 | sec = (int) duration; | |
2449 | usec += (duration - sec) * 1000000; | |
2450 | } | |
2451 | #else | |
2452 | CHECK_NUMBER (seconds, 0); | |
2453 | sec = XINT (seconds); | |
2454 | #endif | |
f76475ad | 2455 | |
f76475ad | 2456 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2457 | if (usec != 0 && sec == 0) |
2458 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2459 | #endif |
f76475ad JB |
2460 | |
2461 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
2462 | } | |
4588ec20 JB |
2463 | \f |
2464 | char *terminal_type; | |
2465 | ||
2466 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2467 | /* Determine terminal type and set terminal_driver */ | |
2468 | /* Then invoke its decoding routine to set up variables | |
2469 | in the terminal package */ | |
2470 | ||
2471 | init_display () | |
2472 | { | |
2473 | #ifdef HAVE_X_WINDOWS | |
2474 | extern int display_arg; | |
2475 | #endif | |
2476 | ||
2477 | meta_key = 0; | |
2478 | inverse_video = 0; | |
2479 | cursor_in_echo_area = 0; | |
2480 | terminal_type = (char *) 0; | |
2481 | ||
1315c181 JB |
2482 | /* Now is the time to initialize this; it's used by init_sys_modes |
2483 | during startup. */ | |
2484 | Vwindow_system = Qnil; | |
4588ec20 | 2485 | |
1315c181 JB |
2486 | /* If the user wants to use a window system, we shouldn't bother |
2487 | initializing the terminal. This is especially important when the | |
2488 | terminal is so dumb that emacs gives up before and doesn't bother | |
2489 | using the window system. | |
4588ec20 | 2490 | |
36bbad1d KH |
2491 | If the DISPLAY environment variable is set and nonempty, |
2492 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
2493 | |
2494 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2495 | if (! display_arg) |
2496 | { | |
36bbad1d | 2497 | char *display; |
d460af17 | 2498 | #ifdef VMS |
36bbad1d | 2499 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 2500 | #else |
36bbad1d | 2501 | display = getenv ("DISPLAY"); |
d460af17 | 2502 | #endif |
36bbad1d KH |
2503 | |
2504 | display_arg = (display != 0 && *display != 0); | |
f040093a | 2505 | } |
d460af17 JB |
2506 | |
2507 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2508 | { |
2509 | Vwindow_system = intern ("x"); | |
2510 | #ifdef HAVE_X11 | |
2511 | Vwindow_system_version = make_number (11); | |
2512 | #else | |
2513 | Vwindow_system_version = make_number (10); | |
039e5d71 KH |
2514 | #endif |
2515 | #if defined (LINUX) && defined (HAVE_LIBNCURSES) | |
2516 | /* In some versions of ncurses, | |
6a428f77 | 2517 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
2518 | So call tgetent. */ |
2519 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
2520 | #endif |
2521 | return; | |
2522 | } | |
2523 | #endif /* HAVE_X_WINDOWS */ | |
2524 | ||
fd2e066a GV |
2525 | #ifdef HAVE_NTGUI |
2526 | if (!inhibit_window_system) | |
2527 | { | |
2528 | Vwindow_system = intern ("win32"); | |
2529 | Vwindow_system_version = make_number (1); | |
2530 | return; | |
2531 | } | |
2532 | #endif /* HAVE_NTGUI */ | |
2533 | ||
4588ec20 JB |
2534 | /* If no window system has been specified, try to use the terminal. */ |
2535 | if (! isatty (0)) | |
2536 | { | |
2537 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2538 | exit (1); | |
2539 | } | |
2540 | ||
2541 | /* Look at the TERM variable */ | |
2542 | terminal_type = (char *) getenv ("TERM"); | |
2543 | if (!terminal_type) | |
2544 | { | |
2545 | #ifdef VMS | |
2546 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2547 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2548 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2549 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2550 | #else | |
2551 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2552 | #endif | |
2553 | exit (1); | |
2554 | } | |
2555 | ||
2556 | #ifdef VMS | |
2557 | /* VMS DCL tends to upcase things, so downcase term type. | |
2558 | Hardly any uppercase letters in terminal types; should be none. */ | |
2559 | { | |
2560 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2561 | char *p; | |
2562 | ||
2563 | strcpy (new, terminal_type); | |
2564 | ||
2565 | for (p = new; *p; p++) | |
2566 | if (isupper (*p)) | |
2567 | *p = tolower (*p); | |
2568 | ||
2569 | terminal_type = new; | |
2570 | } | |
2571 | #endif | |
2572 | ||
2573 | term_init (terminal_type); | |
2574 | ||
502b9b64 JB |
2575 | remake_frame_glyphs (selected_frame); |
2576 | calculate_costs (selected_frame); | |
4588ec20 JB |
2577 | |
2578 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2579 | FRAME_CURSOR_X (selected_frame) = 0; |
2580 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2581 | |
2582 | #ifdef SIGWINCH | |
2583 | #ifndef CANNOT_DUMP | |
2584 | if (initialized) | |
2585 | #endif /* CANNOT_DUMP */ | |
2586 | signal (SIGWINCH, window_change_signal); | |
2587 | #endif /* SIGWINCH */ | |
2588 | } | |
2589 | \f | |
2590 | syms_of_display () | |
2591 | { | |
502b9b64 JB |
2592 | #ifdef MULTI_FRAME |
2593 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2594 | #endif |
2595 | defsubr (&Sredraw_display); | |
078b3696 | 2596 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
2597 | defsubr (&Sopen_termscript); |
2598 | defsubr (&Sding); | |
2599 | defsubr (&Ssit_for); | |
2600 | defsubr (&Ssleep_for); | |
2601 | defsubr (&Ssend_string_to_terminal); | |
2602 | ||
d1dad759 | 2603 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
2604 | staticpro (&frame_and_buffer_state); |
2605 | ||
9cda4f7c RS |
2606 | Qdisplay_table = intern ("display-table"); |
2607 | staticpro (&Qdisplay_table); | |
2608 | ||
4588ec20 | 2609 | DEFVAR_INT ("baud-rate", &baud_rate, |
eb285955 | 2610 | "*The output baud rate of the terminal.\n\ |
4588ec20 JB |
2611 | On most systems, changing this value will affect the amount of padding\n\ |
2612 | and the other strategic decisions made during redisplay."); | |
2613 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2614 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2615 | This means everything is in inverse video which otherwise would not be."); |
2616 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2617 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2618 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2619 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2620 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2621 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2622 | It is up to you to set this variable if your terminal can do that."); |
2623 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2624 | "A symbol naming the window-system under which Emacs is running\n\ | |
2625 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2626 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2627 | "The version number of the window system in use.\n\ | |
2628 | For X windows, this is 10 or 11."); | |
2629 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2630 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2631 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2632 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2633 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2634 | Each element can be:\n\ | |
2635 | integer: a glyph code which this glyph is an alias for.\n\ | |
2636 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2637 | nil: this glyph mod 256 is char code to output,\n\ | |
6666f05a | 2638 | and this glyph / 256 is face code for X windows (see `face-id')."); |
4588ec20 JB |
2639 | Vglyph_table = Qnil; |
2640 | ||
2641 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2642 | "Display table to use for buffers that specify none.\n\ | |
2643 | See `buffer-display-table' for more information."); | |
2644 | Vstandard_display_table = Qnil; | |
2645 | ||
2646 | /* Initialize `window-system', unless init_display already decided it. */ | |
2647 | #ifdef CANNOT_DUMP | |
2648 | if (noninteractive) | |
2649 | #endif | |
2650 | { | |
2651 | Vwindow_system = Qnil; | |
2652 | Vwindow_system_version = Qnil; | |
2653 | } | |
2654 | } |