Commit | Line | Data |
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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 | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
22 | ||
18160b98 | 23 | #include <config.h> |
565620a5 RS |
24 | |
25 | #include <stdio.h> | |
4588ec20 JB |
26 | #include <ctype.h> |
27 | ||
47099d6f | 28 | #include "lisp.h" |
4588ec20 JB |
29 | #include "termchar.h" |
30 | #include "termopts.h" | |
3be08bea | 31 | #include "termhooks.h" |
4588ec20 | 32 | #include "cm.h" |
4588ec20 JB |
33 | #include "dispextern.h" |
34 | #include "buffer.h" | |
502b9b64 | 35 | #include "frame.h" |
4588ec20 JB |
36 | #include "window.h" |
37 | #include "commands.h" | |
38 | #include "disptab.h" | |
39 | #include "indent.h" | |
d169fe39 | 40 | #include "intervals.h" |
4588ec20 | 41 | |
648fa17d | 42 | #include "systty.h" |
a41f8bed | 43 | |
4588ec20 JB |
44 | #ifdef HAVE_X_WINDOWS |
45 | #include "xterm.h" | |
46 | #endif /* HAVE_X_WINDOWS */ | |
47 | ||
6cbd1643 RS |
48 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
49 | #include "systime.h" | |
50 | ||
3883a901 RS |
51 | #include <errno.h> |
52 | ||
4588ec20 JB |
53 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
54 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
55 | ||
4588ec20 JB |
56 | /* Get number of chars of output now in the buffer of a stdio stream. |
57 | This ought to be built in in stdio, but it isn't. | |
58 | Some s- files override this because their stdio internals differ. */ | |
e3271ae5 | 59 | #ifdef __GNU_LIBRARY__ |
097c2824 RM |
60 | /* The s- file might have overridden the definition with one that works for |
61 | the system's C library. But we are using the GNU C library, so this is | |
62 | the right definition for every system. */ | |
3883a901 RS |
63 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
64 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
65 | #else | |
cb5558ff | 66 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 67 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
68 | #endif |
69 | #else /* not __GNU_LIBRARY__ */ | |
cb5558ff | 70 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
71 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
72 | #endif | |
e3271ae5 | 73 | #endif |
4588ec20 | 74 | |
45140e01 RS |
75 | static void change_frame_size_1 (); |
76 | ||
a41f8bed | 77 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 78 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 79 | |
502b9b64 | 80 | int frame_garbaged; |
4588ec20 JB |
81 | |
82 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
83 | ||
84 | int display_completed; | |
85 | ||
86 | /* Lisp variable visible-bell; enables use of screen-flash | |
87 | instead of audible bell. */ | |
88 | ||
89 | int visible_bell; | |
90 | ||
502b9b64 | 91 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
92 | |
93 | int inverse_video; | |
94 | ||
95 | /* Line speed of the terminal. */ | |
96 | ||
97 | int baud_rate; | |
98 | ||
99 | /* nil or a symbol naming the window system under which emacs is | |
100 | running ('x is the only current possibility). */ | |
101 | ||
102 | Lisp_Object Vwindow_system; | |
103 | ||
104 | /* Version number of X windows: 10, 11 or nil. */ | |
105 | Lisp_Object Vwindow_system_version; | |
106 | ||
107 | /* Vector of glyph definitions. Indexed by glyph number, | |
108 | the contents are a string which is how to output the glyph. | |
109 | ||
110 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
111 | as a character code. */ | |
112 | ||
113 | Lisp_Object Vglyph_table; | |
114 | ||
115 | /* Display table to use for vectors that don't specify their own. */ | |
116 | ||
117 | Lisp_Object Vstandard_display_table; | |
118 | ||
119 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
120 | so put cursor on minibuffer after the prompt. |
121 | positive means at end of text in echo area; | |
122 | negative means at beginning of line. */ | |
4588ec20 JB |
123 | int cursor_in_echo_area; |
124 | \f | |
502b9b64 | 125 | /* The currently selected frame. |
87485d6f MW |
126 | In a single-frame version, this variable always holds the address of |
127 | the_only_frame. */ | |
4588ec20 | 128 | |
502b9b64 | 129 | FRAME_PTR selected_frame; |
4588ec20 | 130 | |
502b9b64 JB |
131 | /* A frame which is not just a minibuffer, or 0 if there are no such |
132 | frames. This is usually the most recent such frame that was | |
87485d6f MW |
133 | selected. In a single-frame version, this variable always holds |
134 | the address of the_only_frame. */ | |
502b9b64 | 135 | FRAME_PTR last_nonminibuf_frame; |
e5d77022 | 136 | |
502b9b64 | 137 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
138 | exist inside frame objects lives in the following structure instead. |
139 | ||
140 | NOTE: the_only_frame is not checked for garbage collection; don't | |
eb8c3be9 | 141 | store collectible objects in any of its fields! |
190721ac JB |
142 | |
143 | You're not/The only frame in town/... */ | |
4588ec20 | 144 | |
502b9b64 JB |
145 | #ifndef MULTI_FRAME |
146 | struct frame the_only_frame; | |
e5d77022 | 147 | #endif |
4588ec20 JB |
148 | |
149 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
150 | which is used inside `update_frame' to hold the old contents |
151 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
152 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
153 | /* Length of vector currently allocated. */ |
154 | int ophys_lines_length; | |
155 | ||
156 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
157 | ||
158 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
159 | ||
160 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
161 | ||
4588ec20 | 162 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 163 | \f |
502b9b64 | 164 | #ifdef MULTI_FRAME |
4588ec20 | 165 | |
502b9b64 JB |
166 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
167 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
168 | (frame) | |
169 | Lisp_Object frame; | |
4588ec20 | 170 | { |
502b9b64 | 171 | FRAME_PTR f; |
4588ec20 | 172 | |
502b9b64 JB |
173 | CHECK_LIVE_FRAME (frame, 0); |
174 | f = XFRAME (frame); | |
175 | update_begin (f); | |
4588ec20 | 176 | /* set_terminal_modes (); */ |
502b9b64 | 177 | clear_frame (); |
b6a65ac2 | 178 | clear_frame_records (f); |
502b9b64 | 179 | update_end (f); |
4588ec20 | 180 | fflush (stdout); |
4588ec20 JB |
181 | windows_or_buffers_changed++; |
182 | /* Mark all windows as INaccurate, | |
183 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
184 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
185 | f->garbaged = 0; | |
4588ec20 JB |
186 | return Qnil; |
187 | } | |
188 | ||
502b9b64 JB |
189 | redraw_frame (f) |
190 | FRAME_PTR f; | |
4588ec20 | 191 | { |
502b9b64 | 192 | Lisp_Object frame; |
e9c9a718 | 193 | XSETFRAME (frame, f); |
502b9b64 | 194 | Fredraw_frame (frame); |
4588ec20 JB |
195 | } |
196 | ||
35f56f96 | 197 | #else |
4588ec20 | 198 | |
d8039c5c | 199 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
5c586a6c KH |
200 | /* Don't confuse make-docfile by having two doc strings for this function. |
201 | make-docfile does not pay attention to #if, for good reason! */ | |
202 | 0) | |
35f56f96 JB |
203 | (frame) |
204 | Lisp_Object frame; | |
4588ec20 JB |
205 | { |
206 | update_begin (0); | |
207 | set_terminal_modes (); | |
502b9b64 | 208 | clear_frame (); |
4588ec20 JB |
209 | update_end (0); |
210 | fflush (stdout); | |
502b9b64 | 211 | clear_frame_records (0); |
4588ec20 JB |
212 | windows_or_buffers_changed++; |
213 | /* Mark all windows as INaccurate, | |
214 | so that every window will have its redisplay done. */ | |
b5c685f4 | 215 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
216 | return Qnil; |
217 | } | |
218 | ||
35f56f96 JB |
219 | #endif |
220 | ||
221 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
222 | "Clear and redisplay all visible frames.") | |
223 | () | |
224 | { | |
225 | Lisp_Object tail, frame; | |
226 | ||
227 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 228 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
229 | Fredraw_frame (frame); |
230 | ||
231 | return Qnil; | |
232 | } | |
233 | ||
9223a96a RS |
234 | /* This is used when frame_garbaged is set. |
235 | Redraw the individual frames marked as garbaged. */ | |
236 | ||
237 | void | |
238 | redraw_garbaged_frames () | |
239 | { | |
240 | Lisp_Object tail, frame; | |
241 | ||
242 | FOR_EACH_FRAME (tail, frame) | |
243 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
244 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
245 | Fredraw_frame (frame); | |
246 | } | |
247 | ||
4588ec20 | 248 | \f |
502b9b64 JB |
249 | static struct frame_glyphs * |
250 | make_frame_glyphs (frame, empty) | |
251 | register FRAME_PTR frame; | |
4588ec20 JB |
252 | int empty; |
253 | { | |
254 | register int i; | |
502b9b64 JB |
255 | register width = FRAME_WIDTH (frame); |
256 | register height = FRAME_HEIGHT (frame); | |
60a8948a RS |
257 | register struct frame_glyphs *new |
258 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 259 | |
502b9b64 | 260 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
261 | new->height = height; |
262 | new->width = width; | |
263 | new->used = (int *) xmalloc (height * sizeof (int)); | |
264 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
60a8948a | 265 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
4588ec20 JB |
266 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
267 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
268 | bzero (new->enable, height * sizeof (char)); | |
269 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
270 | ||
271 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 272 | if (FRAME_X_P (frame)) |
4588ec20 | 273 | { |
4588ec20 JB |
274 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
275 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
276 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
277 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 278 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
279 | } |
280 | #endif | |
281 | ||
282 | if (empty) | |
283 | { | |
284 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 285 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 | 286 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
d52bad65 | 287 | unsigned int total_charstarts = (width + 2) * sizeof (int); |
4588ec20 JB |
288 | |
289 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
290 | bzero (new->total_contents, total_glyphs); | |
d52bad65 RS |
291 | |
292 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
293 | bzero (new->total_charstarts, total_glyphs); | |
4588ec20 JB |
294 | } |
295 | else | |
296 | { | |
297 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
298 | ||
299 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
300 | bzero (new->total_contents, total_glyphs); | |
301 | for (i = 0; i < height; i++) | |
302 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
60a8948a RS |
303 | |
304 | if (!FRAME_TERMCAP_P (frame)) | |
305 | { | |
306 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); | |
307 | ||
308 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
309 | bzero (new->total_charstarts, total_charstarts); | |
310 | for (i = 0; i < height; i++) | |
311 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; | |
312 | } | |
313 | else | |
314 | { | |
315 | /* Without a window system, we don't really need charstarts. | |
316 | So use a small amount of space to make enough data structure | |
317 | to prevent crashes in display_text_line. */ | |
318 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); | |
319 | for (i = 0; i < height; i++) | |
320 | new->charstarts[i] = new->total_charstarts; | |
321 | } | |
4588ec20 JB |
322 | } |
323 | ||
324 | return new; | |
325 | } | |
326 | ||
05233a7d | 327 | void |
502b9b64 JB |
328 | free_frame_glyphs (frame, glyphs) |
329 | FRAME_PTR frame; | |
330 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
331 | { |
332 | if (glyphs->total_contents) | |
9ac0d9e0 | 333 | xfree (glyphs->total_contents); |
60a8948a RS |
334 | if (glyphs->total_charstarts) |
335 | xfree (glyphs->total_charstarts); | |
4588ec20 | 336 | |
9ac0d9e0 JB |
337 | xfree (glyphs->used); |
338 | xfree (glyphs->glyphs); | |
339 | xfree (glyphs->highlight); | |
340 | xfree (glyphs->enable); | |
341 | xfree (glyphs->bufp); | |
60a8948a RS |
342 | if (glyphs->charstarts) |
343 | xfree (glyphs->charstarts); | |
4588ec20 JB |
344 | |
345 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 346 | if (FRAME_X_P (frame)) |
4588ec20 | 347 | { |
9ac0d9e0 JB |
348 | xfree (glyphs->top_left_x); |
349 | xfree (glyphs->top_left_y); | |
350 | xfree (glyphs->pix_width); | |
351 | xfree (glyphs->pix_height); | |
352 | xfree (glyphs->max_ascent); | |
4588ec20 JB |
353 | } |
354 | #endif | |
355 | ||
9ac0d9e0 | 356 | xfree (glyphs); |
4588ec20 JB |
357 | } |
358 | ||
45140e01 | 359 | void |
502b9b64 JB |
360 | remake_frame_glyphs (frame) |
361 | FRAME_PTR frame; | |
4588ec20 | 362 | { |
502b9b64 JB |
363 | if (FRAME_CURRENT_GLYPHS (frame)) |
364 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
365 | if (FRAME_DESIRED_GLYPHS (frame)) | |
366 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
367 | if (FRAME_TEMP_GLYPHS (frame)) | |
368 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
369 | ||
370 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
371 | { |
372 | /* Reallocate the frame's message buffer; remember that | |
373 | echo_area_glyphs may be pointing here. */ | |
374 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
375 | ||
376 | FRAME_MESSAGE_BUF (frame) | |
377 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
378 | FRAME_WIDTH (frame) + 1); | |
379 | ||
380 | if (echo_area_glyphs == old_message_buf) | |
381 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
382 | if (previous_echo_glyphs == old_message_buf) | |
383 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
384 | } | |
4588ec20 | 385 | else |
502b9b64 JB |
386 | FRAME_MESSAGE_BUF (frame) |
387 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 388 | |
502b9b64 JB |
389 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
390 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
391 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
45140e01 RS |
392 | if (! FRAME_TERMCAP_P (frame) || frame == selected_frame) |
393 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
394 | } |
395 | \f | |
502b9b64 | 396 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
397 | |
398 | static int | |
399 | line_hash_code (m, vpos) | |
502b9b64 | 400 | register struct frame_glyphs *m; |
4588ec20 JB |
401 | int vpos; |
402 | { | |
403 | register GLYPH *body, *end; | |
404 | register int h = 0; | |
405 | ||
406 | if (!m->enable[vpos]) | |
407 | return 0; | |
408 | ||
94aa5d2d | 409 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
410 | so as to encourage scrolling to leave them in place. */ |
411 | if (m->highlight[vpos]) | |
412 | return -1; | |
413 | ||
414 | body = m->glyphs[vpos]; | |
415 | ||
416 | if (must_write_spaces) | |
417 | while (1) | |
418 | { | |
419 | GLYPH g = *body++; | |
420 | ||
421 | if (g == 0) | |
422 | break; | |
423 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
424 | } | |
425 | else | |
426 | while (1) | |
427 | { | |
428 | GLYPH g = *body++; | |
429 | ||
430 | if (g == 0) | |
431 | break; | |
432 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
433 | } | |
434 | ||
435 | if (h) | |
436 | return h; | |
437 | return 1; | |
438 | } | |
439 | ||
440 | /* Return number of characters in line in M at vpos VPOS, | |
441 | except don't count leading and trailing spaces | |
442 | unless the terminal requires those to be explicitly output. */ | |
443 | ||
444 | static unsigned int | |
445 | line_draw_cost (m, vpos) | |
502b9b64 | 446 | struct frame_glyphs *m; |
4588ec20 JB |
447 | int vpos; |
448 | { | |
449 | register GLYPH *beg = m->glyphs[vpos]; | |
450 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
451 | register int i; | |
452 | register int tlen = GLYPH_TABLE_LENGTH; | |
453 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
454 | ||
455 | /* Ignore trailing and leading spaces if we can. */ | |
456 | if (!must_write_spaces) | |
457 | { | |
458 | while ((end != beg) && (*end == SPACEGLYPH)) | |
459 | --end; | |
460 | if (end == beg) | |
461 | return (0); /* All blank line. */ | |
462 | ||
463 | while (*beg == SPACEGLYPH) | |
464 | ++beg; | |
465 | } | |
466 | ||
467 | /* If we don't have a glyph-table, each glyph is one character, | |
468 | so return the number of glyphs. */ | |
469 | if (tbase == 0) | |
470 | return end - beg; | |
471 | ||
472 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
473 | i = 0; | |
474 | while ((beg <= end) && *beg) | |
475 | { | |
476 | register GLYPH g = *beg++; | |
477 | ||
478 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
479 | i += 1; | |
480 | else | |
481 | i += GLYPH_LENGTH (tbase, g); | |
482 | } | |
483 | return i; | |
484 | } | |
485 | \f | |
486 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
487 | ||
488 | The only other interface into redisplay is through setting | |
502b9b64 JB |
489 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
490 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
491 | |
492 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
493 | ||
502b9b64 | 494 | cancel_line (vpos, frame) |
4588ec20 | 495 | int vpos; |
502b9b64 | 496 | register FRAME_PTR frame; |
4588ec20 | 497 | { |
502b9b64 | 498 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
499 | } |
500 | ||
502b9b64 JB |
501 | clear_frame_records (frame) |
502 | register FRAME_PTR frame; | |
4588ec20 | 503 | { |
502b9b64 | 504 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
505 | } |
506 | ||
836d2cde RS |
507 | /* Clear out all display lines for a coming redisplay. */ |
508 | ||
509 | void | |
510 | init_desired_glyphs (frame) | |
511 | register FRAME_PTR frame; | |
512 | { | |
513 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
514 | int vpos; | |
515 | int height = FRAME_HEIGHT (frame); | |
516 | ||
517 | for (vpos = 0; vpos < height; vpos++) | |
518 | desired_glyphs->enable[vpos] = 0; | |
519 | } | |
520 | ||
4588ec20 JB |
521 | /* Prepare to display on line VPOS starting at HPOS within it. */ |
522 | ||
523 | void | |
502b9b64 JB |
524 | get_display_line (frame, vpos, hpos) |
525 | register FRAME_PTR frame; | |
4588ec20 JB |
526 | int vpos; |
527 | register int hpos; | |
528 | { | |
502b9b64 JB |
529 | register struct frame_glyphs *glyphs; |
530 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
531 | register GLYPH *p; |
532 | ||
7c3c72ec | 533 | if (vpos < 0) |
4588ec20 JB |
534 | abort (); |
535 | ||
536 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
537 | abort (); | |
538 | ||
539 | if (! desired_glyphs->enable[vpos]) | |
540 | { | |
541 | desired_glyphs->used[vpos] = 0; | |
542 | desired_glyphs->highlight[vpos] = 0; | |
543 | desired_glyphs->enable[vpos] = 1; | |
544 | } | |
545 | ||
546 | if (hpos > desired_glyphs->used[vpos]) | |
547 | { | |
548 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
549 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
550 | ||
551 | desired_glyphs->used[vpos] = hpos; | |
552 | while (g != end) | |
553 | *g++ = SPACEGLYPH; | |
554 | } | |
555 | } | |
556 | ||
557 | /* Like bcopy except never gets confused by overlap. */ | |
558 | ||
559 | void | |
560 | safe_bcopy (from, to, size) | |
561 | char *from, *to; | |
562 | int size; | |
563 | { | |
b5c685f4 | 564 | if (size <= 0 || from == to) |
4588ec20 JB |
565 | return; |
566 | ||
b5c685f4 JB |
567 | /* If the source and destination don't overlap, then bcopy can |
568 | handle it. If they do overlap, but the destination is lower in | |
569 | memory than the source, we'll assume bcopy can handle that. */ | |
570 | if (to < from || from + size <= to) | |
571 | bcopy (from, to, size); | |
572 | ||
573 | /* Otherwise, we'll copy from the end. */ | |
574 | else | |
4588ec20 | 575 | { |
b5c685f4 JB |
576 | register char *endf = from + size; |
577 | register char *endt = to + size; | |
4588ec20 JB |
578 | |
579 | /* If TO - FROM is large, then we should break the copy into | |
580 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
581 | TO - FROM is small, then the bcopy function call overhead | |
582 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
583 | anywhere. Since I don't think the obvious copy loop is too |
584 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
585 | if (to - from < 64) |
586 | { | |
587 | do | |
588 | *--endt = *--endf; | |
589 | while (endf != from); | |
590 | } | |
591 | else | |
592 | { | |
b5c685f4 | 593 | for (;;) |
4588ec20 JB |
594 | { |
595 | endt -= (to - from); | |
596 | endf -= (to - from); | |
597 | ||
b5c685f4 JB |
598 | if (endt < to) |
599 | break; | |
600 | ||
4588ec20 JB |
601 | bcopy (endf, endt, to - from); |
602 | } | |
b5c685f4 JB |
603 | |
604 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
605 | little left over. The amount left over is |
606 | (endt + (to - from)) - to, which is endt - from. */ | |
607 | bcopy (from, to, endt - from); | |
608 | } | |
609 | } | |
4588ec20 JB |
610 | } |
611 | ||
98038dc0 | 612 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
613 | DISTANCE may be negative. */ |
614 | ||
615 | static void | |
616 | rotate_vector (vector, size, distance) | |
617 | char *vector; | |
618 | int size; | |
619 | int distance; | |
620 | { | |
621 | char *temp = (char *) alloca (size); | |
622 | ||
623 | if (distance < 0) | |
624 | distance += size; | |
625 | ||
626 | bcopy (vector, temp + distance, size - distance); | |
627 | bcopy (vector + size - distance, temp, distance); | |
628 | bcopy (temp, vector, size); | |
629 | } | |
630 | ||
631 | /* Scroll lines from vpos FROM up to but not including vpos END | |
632 | down by AMOUNT lines (AMOUNT may be negative). | |
633 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
634 | ||
635 | int | |
d52bad65 | 636 | scroll_frame_lines (frame, from, end, amount, newpos) |
502b9b64 | 637 | register FRAME_PTR frame; |
d52bad65 | 638 | int from, end, amount, newpos; |
4588ec20 JB |
639 | { |
640 | register int i; | |
502b9b64 JB |
641 | register struct frame_glyphs *current_frame |
642 | = FRAME_CURRENT_GLYPHS (frame); | |
d52bad65 | 643 | int pos_adjust; |
23b0200c | 644 | int width = FRAME_WIDTH (frame); |
4588ec20 JB |
645 | |
646 | if (!line_ins_del_ok) | |
647 | return 0; | |
648 | ||
649 | if (amount == 0) | |
650 | return 1; | |
651 | ||
652 | if (amount > 0) | |
653 | { | |
502b9b64 | 654 | update_begin (frame); |
4588ec20 JB |
655 | set_terminal_window (end + amount); |
656 | if (!scroll_region_ok) | |
657 | ins_del_lines (end, -amount); | |
658 | ins_del_lines (from, amount); | |
659 | set_terminal_window (0); | |
660 | ||
502b9b64 | 661 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
662 | sizeof (GLYPH *) * (end + amount - from), |
663 | amount * sizeof (GLYPH *)); | |
664 | ||
60a8948a | 665 | rotate_vector (current_frame->charstarts + from, |
d52bad65 RS |
666 | sizeof (int *) * (end + amount - from), |
667 | amount * sizeof (int *)); | |
668 | ||
23b0200c RS |
669 | safe_bcopy (current_frame->used + from, |
670 | current_frame->used + from + amount, | |
671 | (end - from) * sizeof current_frame->used[0]); | |
672 | ||
673 | safe_bcopy (current_frame->highlight + from, | |
674 | current_frame->highlight + from + amount, | |
675 | (end - from) * sizeof current_frame->highlight[0]); | |
676 | ||
677 | safe_bcopy (current_frame->enable + from, | |
678 | current_frame->enable + from + amount, | |
679 | (end - from) * sizeof current_frame->enable[0]); | |
680 | ||
d52bad65 RS |
681 | /* Adjust the lines by an amount |
682 | that puts the first of them at NEWPOS. */ | |
23b0200c | 683 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
684 | |
685 | /* Offset each char position in the charstarts lines we moved | |
686 | by pos_adjust. */ | |
23b0200c | 687 | for (i = from + amount; i < end + amount; i++) |
60a8948a | 688 | { |
d52bad65 | 689 | int *line = current_frame->charstarts[i]; |
60a8948a | 690 | int col; |
23b0200c RS |
691 | for (col = 0; col < width; col++) |
692 | if (line[col] > 0) | |
693 | line[col] += pos_adjust; | |
60a8948a | 694 | } |
23b0200c | 695 | for (i = from; i < from + amount; i++) |
60a8948a | 696 | { |
d52bad65 | 697 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
698 | int col; |
699 | line[0] = -1; | |
23b0200c | 700 | for (col = 0; col < width; col++) |
60a8948a RS |
701 | line[col] = 0; |
702 | } | |
703 | ||
4588ec20 JB |
704 | /* Mark the lines made empty by scrolling as enabled, empty and |
705 | normal video. */ | |
502b9b64 JB |
706 | bzero (current_frame->used + from, |
707 | amount * sizeof current_frame->used[0]); | |
708 | bzero (current_frame->highlight + from, | |
709 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
710 | for (i = from; i < from + amount; i++) |
711 | { | |
502b9b64 | 712 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 713 | current_frame->charstarts[i][0] = -1; |
502b9b64 | 714 | current_frame->enable[i] = 1; |
4588ec20 JB |
715 | } |
716 | ||
502b9b64 JB |
717 | safe_bcopy (current_frame->bufp + from, |
718 | current_frame->bufp + from + amount, | |
719 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
720 | |
721 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 722 | if (FRAME_X_P (frame)) |
4588ec20 | 723 | { |
502b9b64 JB |
724 | safe_bcopy (current_frame->top_left_x + from, |
725 | current_frame->top_left_x + from + amount, | |
726 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 727 | |
502b9b64 JB |
728 | safe_bcopy (current_frame->top_left_y + from, |
729 | current_frame->top_left_y + from + amount, | |
730 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 731 | |
502b9b64 JB |
732 | safe_bcopy (current_frame->pix_width + from, |
733 | current_frame->pix_width + from + amount, | |
734 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 735 | |
502b9b64 JB |
736 | safe_bcopy (current_frame->pix_height + from, |
737 | current_frame->pix_height + from + amount, | |
738 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
739 | |
740 | safe_bcopy (current_frame->max_ascent + from, | |
741 | current_frame->max_ascent + from + amount, | |
742 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
743 | } |
744 | #endif /* HAVE_X_WINDOWS */ | |
745 | ||
502b9b64 | 746 | update_end (frame); |
4588ec20 JB |
747 | } |
748 | if (amount < 0) | |
749 | { | |
502b9b64 | 750 | update_begin (frame); |
4588ec20 JB |
751 | set_terminal_window (end); |
752 | ins_del_lines (from + amount, amount); | |
753 | if (!scroll_region_ok) | |
754 | ins_del_lines (end + amount, -amount); | |
755 | set_terminal_window (0); | |
756 | ||
502b9b64 | 757 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
758 | sizeof (GLYPH *) * (end - from - amount), |
759 | amount * sizeof (GLYPH *)); | |
760 | ||
60a8948a | 761 | rotate_vector (current_frame->charstarts + from + amount, |
d52bad65 RS |
762 | sizeof (int *) * (end - from - amount), |
763 | amount * sizeof (int *)); | |
764 | ||
23b0200c RS |
765 | safe_bcopy (current_frame->used + from, |
766 | current_frame->used + from + amount, | |
767 | (end - from) * sizeof current_frame->used[0]); | |
768 | ||
769 | safe_bcopy (current_frame->highlight + from, | |
770 | current_frame->highlight + from + amount, | |
771 | (end - from) * sizeof current_frame->highlight[0]); | |
772 | ||
773 | safe_bcopy (current_frame->enable + from, | |
774 | current_frame->enable + from + amount, | |
775 | (end - from) * sizeof current_frame->enable[0]); | |
776 | ||
d52bad65 RS |
777 | /* Adjust the lines by an amount |
778 | that puts the first of them at NEWPOS. */ | |
23b0200c | 779 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
780 | |
781 | /* Offset each char position in the charstarts lines we moved | |
782 | by pos_adjust. */ | |
783 | for (i = from + amount; i < end + amount; i++) | |
784 | { | |
d52bad65 | 785 | int *line = current_frame->charstarts[i]; |
60a8948a | 786 | int col; |
23b0200c RS |
787 | for (col = 0; col < width; col++) |
788 | if (line[col] > 0) | |
789 | line[col] += pos_adjust; | |
60a8948a | 790 | } |
23b0200c | 791 | for (i = end + amount; i < end; i++) |
60a8948a | 792 | { |
d52bad65 | 793 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
794 | int col; |
795 | line[0] = -1; | |
23b0200c | 796 | for (col = 0; col < width; col++) |
60a8948a RS |
797 | line[col] = 0; |
798 | } | |
799 | ||
4588ec20 JB |
800 | /* Mark the lines made empty by scrolling as enabled, empty and |
801 | normal video. */ | |
502b9b64 JB |
802 | bzero (current_frame->used + end + amount, |
803 | - amount * sizeof current_frame->used[0]); | |
804 | bzero (current_frame->highlight + end + amount, | |
805 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
806 | for (i = end + amount; i < end; i++) |
807 | { | |
502b9b64 | 808 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 809 | current_frame->charstarts[i][0] = 0; |
502b9b64 | 810 | current_frame->enable[i] = 1; |
4588ec20 JB |
811 | } |
812 | ||
502b9b64 JB |
813 | safe_bcopy (current_frame->bufp + from, |
814 | current_frame->bufp + from + amount, | |
815 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
816 | |
817 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 818 | if (FRAME_X_P (frame)) |
4588ec20 | 819 | { |
502b9b64 JB |
820 | safe_bcopy (current_frame->top_left_x + from, |
821 | current_frame->top_left_x + from + amount, | |
822 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 823 | |
502b9b64 JB |
824 | safe_bcopy (current_frame->top_left_y + from, |
825 | current_frame->top_left_y + from + amount, | |
826 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 827 | |
502b9b64 JB |
828 | safe_bcopy (current_frame->pix_width + from, |
829 | current_frame->pix_width + from + amount, | |
830 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 831 | |
502b9b64 JB |
832 | safe_bcopy (current_frame->pix_height + from, |
833 | current_frame->pix_height + from + amount, | |
834 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
835 | |
836 | safe_bcopy (current_frame->max_ascent + from, | |
837 | current_frame->max_ascent + from + amount, | |
838 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
839 | } |
840 | #endif /* HAVE_X_WINDOWS */ | |
841 | ||
502b9b64 | 842 | update_end (frame); |
4588ec20 JB |
843 | } |
844 | return 1; | |
845 | } | |
846 | \f | |
502b9b64 | 847 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 848 | copy all the columns that W does not occupy |
502b9b64 JB |
849 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
850 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
851 | |
852 | preserve_other_columns (w) | |
853 | struct window *w; | |
854 | { | |
855 | register int vpos; | |
502b9b64 JB |
856 | register struct frame_glyphs *current_frame, *desired_frame; |
857 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
858 | int start = XFASTINT (w->left); |
859 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
860 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
861 | ||
502b9b64 JB |
862 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
863 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
864 | |
865 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
866 | { | |
502b9b64 | 867 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
868 | { |
869 | if (start > 0) | |
870 | { | |
871 | int len; | |
872 | ||
502b9b64 | 873 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 | 874 | desired_frame->glyphs[vpos], |
4b34bd81 | 875 | start * sizeof (current_frame->glyphs[vpos][0])); |
60a8948a RS |
876 | bcopy (current_frame->charstarts[vpos], |
877 | desired_frame->charstarts[vpos], | |
4b34bd81 | 878 | start * sizeof (current_frame->charstarts[vpos][0])); |
502b9b64 JB |
879 | len = min (start, current_frame->used[vpos]); |
880 | if (desired_frame->used[vpos] < len) | |
881 | desired_frame->used[vpos] = len; | |
4588ec20 | 882 | } |
502b9b64 JB |
883 | if (current_frame->used[vpos] > end |
884 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 885 | { |
502b9b64 | 886 | while (desired_frame->used[vpos] < end) |
60a8948a RS |
887 | { |
888 | int used = desired_frame->used[vpos]++; | |
889 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; | |
890 | desired_frame->glyphs[vpos][used] = 0; | |
891 | } | |
502b9b64 JB |
892 | bcopy (current_frame->glyphs[vpos] + end, |
893 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 | 894 | ((current_frame->used[vpos] - end) |
4b34bd81 | 895 | * sizeof (current_frame->glyphs[vpos][0]))); |
60a8948a RS |
896 | bcopy (current_frame->charstarts[vpos] + end, |
897 | desired_frame->charstarts[vpos] + end, | |
898 | ((current_frame->used[vpos] - end) | |
4b34bd81 | 899 | * sizeof (current_frame->charstarts[vpos][0]))); |
502b9b64 | 900 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
901 | } |
902 | } | |
903 | } | |
904 | } | |
905 | \f | |
906 | #if 0 | |
907 | ||
502b9b64 | 908 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 909 | copy all the columns that w does occupy |
502b9b64 JB |
910 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
911 | so that update_frame will not change those columns. | |
4588ec20 JB |
912 | |
913 | Have not been able to figure out how to use this correctly. */ | |
914 | ||
915 | preserve_my_columns (w) | |
916 | struct window *w; | |
917 | { | |
918 | register int vpos, fin; | |
502b9b64 JB |
919 | register struct frame_glyphs *l1, *l2; |
920 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
921 | int start = XFASTINT (w->left); |
922 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
923 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
924 | ||
925 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
926 | { | |
502b9b64 JB |
927 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
928 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
929 | { |
930 | if (l2->length > start && l1->length < l2->length) | |
931 | { | |
932 | fin = l2->length; | |
933 | if (fin > end) fin = end; | |
934 | while (l1->length < start) | |
935 | l1->body[l1->length++] = ' '; | |
936 | bcopy (l2->body + start, l1->body + start, fin - start); | |
937 | l1->length = fin; | |
938 | } | |
939 | } | |
940 | } | |
941 | } | |
942 | ||
943 | #endif | |
944 | \f | |
b64b3980 | 945 | /* Adjust by ADJUST the charstart values in window W |
23b0200c | 946 | after vpos VPOS, which counts relative to the frame |
b64b3980 RS |
947 | (not relative to W itself). */ |
948 | ||
949 | void | |
950 | adjust_window_charstarts (w, vpos, adjust) | |
951 | struct window *w; | |
952 | int vpos; | |
953 | int adjust; | |
954 | { | |
955 | int left = XFASTINT (w->left); | |
956 | int top = XFASTINT (w->top); | |
23b0200c RS |
957 | int right = left + window_internal_width (w); |
958 | int bottom = top + window_internal_height (w); | |
b64b3980 RS |
959 | int i; |
960 | ||
23b0200c | 961 | for (i = vpos + 1; i < bottom; i++) |
b64b3980 RS |
962 | { |
963 | int *charstart | |
964 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; | |
965 | int j; | |
966 | for (j = left; j < right; j++) | |
967 | if (charstart[j] > 0) | |
968 | charstart[j] += adjust; | |
969 | } | |
970 | } | |
23b0200c | 971 | |
352f1545 RS |
972 | /* Check the charstarts values in the area of window W |
973 | for internal consistency. We cannot check that they are "right"; | |
974 | we can only look for something nonsensical. */ | |
975 | ||
23b0200c RS |
976 | verify_charstarts (w) |
977 | struct window *w; | |
978 | { | |
979 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
980 | int i; | |
981 | int top = XFASTINT (w->top); | |
982 | int bottom = top + window_internal_height (w); | |
983 | int left = XFASTINT (w->left); | |
984 | int right = left + window_internal_width (w); | |
985 | int next_line; | |
352f1545 RS |
986 | int truncate = (XINT (w->hscroll) |
987 | || (truncate_partial_width_windows | |
988 | && (XFASTINT (w->width) < FRAME_WIDTH (f))) | |
989 | || !NILP (XBUFFER (w->buffer)->truncate_lines)); | |
23b0200c RS |
990 | |
991 | for (i = top; i < bottom; i++) | |
992 | { | |
993 | int j; | |
994 | int last; | |
352f1545 | 995 | int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; |
23b0200c RS |
996 | |
997 | if (i != top) | |
352f1545 RS |
998 | { |
999 | if (truncate) | |
1000 | { | |
1001 | /* If we are truncating lines, allow a jump | |
1002 | in charstarts from one line to the next. */ | |
1003 | if (charstart[left] < next_line) | |
1004 | abort (); | |
1005 | } | |
1006 | else | |
1007 | { | |
1008 | if (charstart[left] != next_line) | |
1009 | abort (); | |
1010 | } | |
1011 | } | |
23b0200c RS |
1012 | |
1013 | for (j = left; j < right; j++) | |
1014 | if (charstart[j] > 0) | |
1015 | last = charstart[j]; | |
2e8907d3 RS |
1016 | /* Record where the next line should start. */ |
1017 | next_line = last; | |
1018 | if (BUF_ZV (XBUFFER (w->buffer)) != last) | |
1019 | { | |
1020 | /* If there's a newline between the two lines, count that. */ | |
1021 | int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); | |
1022 | if (endchar == '\n') | |
1023 | next_line++; | |
1024 | } | |
23b0200c RS |
1025 | } |
1026 | } | |
b64b3980 | 1027 | \f |
4588ec20 JB |
1028 | /* On discovering that the redisplay for a window was no good, |
1029 | cancel the columns of that window, so that when the window is | |
1030 | displayed over again get_display_line will not complain. */ | |
1031 | ||
1032 | cancel_my_columns (w) | |
1033 | struct window *w; | |
1034 | { | |
1035 | register int vpos; | |
60a8948a RS |
1036 | register struct frame_glyphs *desired_glyphs |
1037 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
1038 | register int start = XFASTINT (w->left); |
1039 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
1040 | ||
1041 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
1042 | if (desired_glyphs->enable[vpos] | |
1043 | && desired_glyphs->used[vpos] >= start) | |
1044 | desired_glyphs->used[vpos] = start; | |
1045 | } | |
1046 | \f | |
502b9b64 | 1047 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
1048 | the necessary output for one change in the buffer. |
1049 | They may return 0 meaning nothing was done if anything is difficult, | |
1050 | or 1 meaning the output was performed properly. | |
502b9b64 | 1051 | They assume that the frame was up to date before the buffer |
94aa5d2d | 1052 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
1053 | see command_loop_1 where these are called. */ |
1054 | ||
1055 | int | |
1056 | direct_output_for_insert (g) | |
1057 | int g; | |
1058 | { | |
502b9b64 JB |
1059 | register FRAME_PTR frame = selected_frame; |
1060 | register struct frame_glyphs *current_frame | |
1061 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
1062 | |
1063 | #ifndef COMPILER_REGISTER_BUG | |
1064 | register | |
1065 | #endif /* COMPILER_REGISTER_BUG */ | |
1066 | struct window *w = XWINDOW (selected_window); | |
1067 | #ifndef COMPILER_REGISTER_BUG | |
1068 | register | |
1069 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1070 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
1071 | #ifndef COMPILER_REGISTER_BUG |
1072 | register | |
1073 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1074 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 1075 | |
fa61c701 JB |
1076 | /* Give up if about to continue line. */ |
1077 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
1078 | ||
4588ec20 JB |
1079 | /* Avoid losing if cursor is in invisible text off left margin */ |
1080 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
1081 | ||
1082 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 1083 | || cursor_in_echo_area |
502b9b64 JB |
1084 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
1085 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 1086 | |
502b9b64 | 1087 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
1088 | || !display_completed |
1089 | ||
1090 | /* Give up if buffer appears in two places. */ | |
1091 | || buffer_shared > 1 | |
1092 | ||
d169fe39 RS |
1093 | #ifdef USE_TEXT_PROPERTIES |
1094 | /* Intervals have already been adjusted, point is after the | |
1095 | character that was just inserted. */ | |
ef4d2f9e | 1096 | /* Give up if character is invisible. */ |
d169fe39 RS |
1097 | /* Give up if character has a face property. |
1098 | At the moment we only lose at end of line or end of buffer | |
1099 | and only with faces that have some background */ | |
1100 | /* Instead of wasting time, give up if character has any text properties */ | |
254277e1 | 1101 | || ! NILP (Ftext_properties_at (make_number (point - 1), Qnil)) |
d169fe39 RS |
1102 | #endif |
1103 | ||
4588ec20 JB |
1104 | /* Give up if w is minibuffer and a message is being displayed there */ |
1105 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
1106 | return 0; | |
1107 | ||
517b2e01 | 1108 | { |
19dff8dc | 1109 | int face = 0; |
87485d6f | 1110 | #ifdef HAVE_FACES |
517b2e01 | 1111 | int dummy; |
19dff8dc RS |
1112 | |
1113 | if (FRAME_X_P (frame)) | |
ea62c5a5 | 1114 | face = compute_char_face (frame, w, point - 1, -1, -1, &dummy, point, 0); |
517b2e01 | 1115 | #endif |
a1c3de84 | 1116 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
839c7dfb RS |
1117 | current_frame->charstarts[vpos][hpos] = point - 1; |
1118 | /* Record the entry for after the newly inserted character. */ | |
1119 | current_frame->charstarts[vpos][hpos + 1] = point; | |
b64b3980 | 1120 | adjust_window_charstarts (w, vpos, 1); |
517b2e01 | 1121 | } |
4588ec20 JB |
1122 | unchanged_modified = MODIFF; |
1123 | beg_unchanged = GPT - BEG; | |
a5d8b611 KH |
1124 | XSETFASTINT (w->last_point, point); |
1125 | XSETFASTINT (w->last_point_x, hpos); | |
1126 | XSETFASTINT (w->last_modified, MODIFF); | |
4588ec20 JB |
1127 | |
1128 | reassert_line_highlight (0, vpos); | |
502b9b64 | 1129 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 1130 | fflush (stdout); |
502b9b64 JB |
1131 | ++FRAME_CURSOR_X (frame); |
1132 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 1133 | { |
502b9b64 JB |
1134 | current_frame->used[vpos] = hpos + 1; |
1135 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
1136 | } |
1137 | ||
1138 | return 1; | |
1139 | } | |
1140 | ||
1141 | int | |
1142 | direct_output_forward_char (n) | |
1143 | int n; | |
1144 | { | |
502b9b64 | 1145 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 1146 | register struct window *w = XWINDOW (selected_window); |
254277e1 | 1147 | Lisp_Object position; |
ea0d86af RS |
1148 | int hpos = FRAME_CURSOR_X (frame); |
1149 | ||
1150 | /* Give up if in truncated text at end of line. */ | |
1151 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1) | |
1152 | return 0; | |
1153 | ||
a9764248 JB |
1154 | /* Avoid losing if cursor is in invisible text off left margin |
1155 | or about to go off either side of window. */ | |
502b9b64 | 1156 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
1157 | && (XINT (w->hscroll) || n < 0)) |
1158 | || (n > 0 | |
fa61c701 | 1159 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 1160 | || cursor_in_echo_area) |
4588ec20 | 1161 | return 0; |
15874c59 | 1162 | |
de83c314 RS |
1163 | /* Can't use direct output if highlighting a region. */ |
1164 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1165 | return 0; | |
1166 | ||
15874c59 KH |
1167 | /* Can't use direct output at an overlay boundary; it might have |
1168 | before-string or after-string properties. */ | |
1169 | if (overlay_touches_p (PT) || overlay_touches_p (PT - n)) | |
1170 | return 0; | |
1171 | ||
d169fe39 RS |
1172 | #ifdef USE_TEXT_PROPERTIES |
1173 | /* Don't use direct output next to an invisible character | |
1174 | since we might need to do something special. */ | |
1175 | ||
a5d8b611 | 1176 | XSETFASTINT (position, point); |
2f24f5ac | 1177 | if (XFASTINT (position) < ZV |
294634fb | 1178 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1179 | Qinvisible, |
294634fb KH |
1180 | selected_window))) |
1181 | return 0; | |
d169fe39 | 1182 | |
a5d8b611 | 1183 | XSETFASTINT (position, point - 1); |
2f24f5ac | 1184 | if (XFASTINT (position) >= BEGV |
294634fb | 1185 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1186 | Qinvisible, |
294634fb KH |
1187 | selected_window))) |
1188 | return 0; | |
d169fe39 RS |
1189 | #endif |
1190 | ||
502b9b64 | 1191 | FRAME_CURSOR_X (frame) += n; |
a5d8b611 KH |
1192 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (frame)); |
1193 | XSETFASTINT (w->last_point, point); | |
502b9b64 | 1194 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 1195 | fflush (stdout); |
d169fe39 | 1196 | |
4588ec20 JB |
1197 | return 1; |
1198 | } | |
1199 | \f | |
1200 | static void update_line (); | |
1201 | ||
502b9b64 | 1202 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
1203 | Value is nonzero if redisplay stopped due to pending input. |
1204 | FORCE nonzero means do not stop for pending input. */ | |
1205 | ||
1206 | int | |
502b9b64 JB |
1207 | update_frame (f, force, inhibit_hairy_id) |
1208 | FRAME_PTR f; | |
4588ec20 JB |
1209 | int force; |
1210 | int inhibit_hairy_id; | |
1211 | { | |
54633da0 | 1212 | register struct frame_glyphs *current_frame; |
7098a0fa | 1213 | register struct frame_glyphs *desired_frame = 0; |
4588ec20 JB |
1214 | register int i; |
1215 | int pause; | |
1216 | int preempt_count = baud_rate / 2400 + 1; | |
1217 | extern input_pending; | |
1218 | #ifdef HAVE_X_WINDOWS | |
1219 | register int downto, leftmost; | |
1220 | #endif | |
1221 | ||
c37e4889 RS |
1222 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
1223 | calculate_costs (f); | |
1224 | ||
d88c2b9e RS |
1225 | if (preempt_count <= 0) |
1226 | preempt_count = 1; | |
1227 | ||
502b9b64 | 1228 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1229 | |
1230 | detect_input_pending (); | |
1231 | if (input_pending && !force) | |
1232 | { | |
1233 | pause = 1; | |
1234 | goto do_pause; | |
1235 | } | |
1236 | ||
502b9b64 | 1237 | update_begin (f); |
4588ec20 JB |
1238 | |
1239 | if (!line_ins_del_ok) | |
1240 | inhibit_hairy_id = 1; | |
1241 | ||
7098a0fa RS |
1242 | /* These are separate to avoid a possible bug in the AIX C compiler. */ |
1243 | current_frame = FRAME_CURRENT_GLYPHS (f); | |
1244 | desired_frame = FRAME_DESIRED_GLYPHS (f); | |
1245 | ||
efb859b4 JB |
1246 | /* See if any of the desired lines are enabled; don't compute for |
1247 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1248 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1249 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1250 | break; |
1251 | ||
1252 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1253 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1254 | force |= scrolling (f); | |
4588ec20 JB |
1255 | |
1256 | /* Update the individual lines as needed. Do bottom line first. */ | |
1257 | ||
502b9b64 JB |
1258 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1259 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
1260 | |
1261 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1262 | if (FRAME_X_P (f)) |
4588ec20 | 1263 | { |
502b9b64 JB |
1264 | leftmost = downto = f->display.x->internal_border_width; |
1265 | if (desired_frame->enable[0]) | |
4588ec20 | 1266 | { |
502b9b64 JB |
1267 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1268 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
1269 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 1270 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1271 | current_frame->top_left_x[0] = leftmost; |
1272 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1273 | } |
1274 | } | |
1275 | #endif /* HAVE_X_WINDOWS */ | |
1276 | ||
1277 | /* Now update the rest of the lines. */ | |
502b9b64 | 1278 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1279 | { |
502b9b64 | 1280 | if (desired_frame->enable[i]) |
4588ec20 | 1281 | { |
b6a65ac2 | 1282 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1283 | { |
1284 | /* Flush out every so many lines. | |
1285 | Also flush out if likely to have more than 1k buffered | |
1286 | otherwise. I'm told that some telnet connections get | |
1287 | really screwed by more than 1k output at once. */ | |
1288 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1289 | if (outq > 900 | |
1290 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1291 | { | |
1292 | fflush (stdout); | |
1293 | if (preempt_count == 1) | |
1294 | { | |
a41f8bed JB |
1295 | #ifdef EMACS_OUTQSIZE |
1296 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1297 | /* Probably not a tty. Ignore the error and reset |
1298 | * the outq count. */ | |
1299 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1300 | #endif | |
1301 | outq *= 10; | |
d520f0d2 | 1302 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 1303 | sleep (outq / baud_rate); |
4588ec20 JB |
1304 | } |
1305 | } | |
1306 | if ((i - 1) % preempt_count == 0) | |
1307 | detect_input_pending (); | |
1308 | } | |
1309 | ||
502b9b64 | 1310 | update_line (f, i); |
4588ec20 | 1311 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1312 | if (FRAME_X_P (f)) |
4588ec20 | 1313 | { |
502b9b64 JB |
1314 | current_frame->top_left_y[i] = downto; |
1315 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1316 | } |
1317 | #endif /* HAVE_X_WINDOWS */ | |
1318 | } | |
1319 | ||
e5d77022 | 1320 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1321 | if (FRAME_X_P (f)) |
448fd7c0 | 1322 | downto += current_frame->pix_height[i]; |
e5d77022 | 1323 | #endif |
4588ec20 | 1324 | } |
502b9b64 | 1325 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1326 | |
1327 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1328 | if (!pause) | |
1329 | { | |
648fa17d | 1330 | if (cursor_in_echo_area |
698e4c1c KH |
1331 | && FRAME_HAS_MINIBUF_P (f) |
1332 | && EQ (FRAME_MINIBUF_WINDOW (f), minibuf_window)) | |
1113d9db | 1333 | { |
648fa17d JB |
1334 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1335 | int row, col; | |
1336 | ||
1337 | if (cursor_in_echo_area < 0) | |
1338 | { | |
1339 | row = top; | |
1340 | col = 0; | |
1341 | } | |
1113d9db | 1342 | else |
648fa17d JB |
1343 | { |
1344 | /* If the minibuffer is several lines high, find the last | |
1345 | line that has any text on it. */ | |
1346 | row = FRAME_HEIGHT (f); | |
1347 | do | |
1348 | { | |
1349 | row--; | |
1350 | if (current_frame->enable[row]) | |
1351 | col = current_frame->used[row]; | |
1352 | else | |
1353 | col = 0; | |
1354 | } | |
1355 | while (row > top && col == 0); | |
1356 | ||
1357 | if (col >= FRAME_WIDTH (f)) | |
1358 | { | |
1359 | col = 0; | |
1360 | if (row < FRAME_HEIGHT (f) - 1) | |
1361 | row++; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | cursor_to (row, col); | |
1113d9db | 1366 | } |
4588ec20 | 1367 | else |
502b9b64 JB |
1368 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1369 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1370 | } |
1371 | ||
502b9b64 | 1372 | update_end (f); |
4588ec20 JB |
1373 | |
1374 | if (termscript) | |
1375 | fflush (termscript); | |
1376 | fflush (stdout); | |
1377 | ||
1378 | /* Here if output is preempted because input is detected. */ | |
1379 | do_pause: | |
1380 | ||
502b9b64 | 1381 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1382 | display_completed = !pause; |
1383 | ||
f5843453 | 1384 | bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1385 | return pause; |
1386 | } | |
1387 | ||
1388 | /* Called when about to quit, to check for doing so | |
1389 | at an improper time. */ | |
1390 | ||
1391 | void | |
1392 | quit_error_check () | |
1393 | { | |
502b9b64 | 1394 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1395 | return; |
502b9b64 | 1396 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1397 | abort (); |
502b9b64 | 1398 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1399 | abort (); |
1400 | } | |
1401 | \f | |
1402 | /* Decide what insert/delete line to do, and do it */ | |
1403 | ||
1404 | extern void scrolling_1 (); | |
1405 | ||
502b9b64 JB |
1406 | scrolling (frame) |
1407 | FRAME_PTR frame; | |
4588ec20 JB |
1408 | { |
1409 | int unchanged_at_top, unchanged_at_bottom; | |
1410 | int window_size; | |
1411 | int changed_lines; | |
502b9b64 JB |
1412 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1413 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1414 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
190bb91a | 1415 | int *old_draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
4588ec20 | 1416 | register int i; |
502b9b64 JB |
1417 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1418 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1419 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1420 | |
1421 | /* Compute hash codes of all the lines. | |
1422 | Also calculate number of changed lines, | |
1423 | number of unchanged lines at the beginning, | |
1424 | and number of unchanged lines at the end. */ | |
1425 | ||
1426 | changed_lines = 0; | |
1427 | unchanged_at_top = 0; | |
502b9b64 JB |
1428 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1429 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1430 | { |
1431 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1432 | if (!current_frame->enable[i]) |
4588ec20 | 1433 | return 0; |
502b9b64 JB |
1434 | old_hash[i] = line_hash_code (current_frame, i); |
1435 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1436 | new_hash[i] = old_hash[i]; |
1437 | else | |
502b9b64 | 1438 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1439 | |
1440 | if (old_hash[i] != new_hash[i]) | |
1441 | { | |
1442 | changed_lines++; | |
502b9b64 | 1443 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1444 | } |
1445 | else if (i == unchanged_at_top) | |
1446 | unchanged_at_top++; | |
502b9b64 | 1447 | draw_cost[i] = line_draw_cost (desired_frame, i); |
190bb91a | 1448 | old_draw_cost[i] = line_draw_cost (current_frame, i); |
4588ec20 JB |
1449 | } |
1450 | ||
1451 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
190bb91a | 1452 | if (!scroll_region_ok && changed_lines < baud_rate / 2400 |
502b9b64 | 1453 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1454 | return 1; |
1455 | ||
502b9b64 | 1456 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1457 | - unchanged_at_bottom); |
1458 | ||
1459 | if (scroll_region_ok) | |
1460 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1461 | else if (memory_below_frame) |
4588ec20 JB |
1462 | free_at_end_vpos = -1; |
1463 | ||
1464 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1465 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 1466 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
1467 | && (window_size >= |
1468 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1469 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1470 | old_hash, new_hash, draw_cost))) |
1471 | return 0; | |
1472 | ||
502b9b64 | 1473 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 1474 | draw_cost + unchanged_at_top - 1, |
190bb91a | 1475 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
1476 | old_hash + unchanged_at_top - 1, |
1477 | new_hash + unchanged_at_top - 1, | |
1478 | free_at_end_vpos - unchanged_at_top); | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | \f | |
1483 | /* Return the offset in its buffer of the character at location col, line | |
1484 | in the given window. */ | |
1485 | int | |
1486 | buffer_posn_from_coords (window, col, line) | |
1487 | struct window *window; | |
1488 | int col, line; | |
1489 | { | |
ef0fdbb1 | 1490 | int hscroll = XINT (window->hscroll); |
4588ec20 JB |
1491 | int window_left = XFASTINT (window->left); |
1492 | ||
1493 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1494 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1495 | window. */ | |
fa61c701 | 1496 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1497 | |
efb859b4 | 1498 | int startp = marker_position (window->start); |
4588ec20 JB |
1499 | |
1500 | /* Since compute_motion will only operate on the current buffer, | |
1501 | we need to save the old one and restore it when we're done. */ | |
1502 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1503 | struct position *posn; |
4588ec20 JB |
1504 | |
1505 | current_buffer = XBUFFER (window->buffer); | |
1506 | ||
2ba9ed58 KH |
1507 | /* We can't get a correct result in this case, |
1508 | but at least prevent compute_motion from crashing. */ | |
1509 | if (startp < BEGV) | |
1510 | startp = BEGV; | |
1511 | ||
502b9b64 JB |
1512 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1513 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1514 | the window, but it isn't maintained correctly, and I'm not even |
1515 | sure I will keep it. */ | |
1516 | posn = compute_motion (startp, 0, | |
94129385 KH |
1517 | ((window == XWINDOW (minibuf_window) && startp == BEG |
1518 | ? minibuf_prompt_width : 0) | |
1519 | + (hscroll ? 1 - hscroll : 0)), | |
1520 | 0, | |
fb0f454a | 1521 | ZV, line, col, |
e37f06d7 | 1522 | window_width, hscroll, 0, window); |
4588ec20 JB |
1523 | |
1524 | current_buffer = old_current_buffer; | |
1525 | ||
502b9b64 | 1526 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1527 | to be *after* the newline, i.e. at the start of the next line. |
1528 | This is reasonable, but not really what we want. So if the | |
1529 | result is on a line below LINE, back it up one character. */ | |
1530 | if (posn->vpos > line) | |
1531 | return posn->bufpos - 1; | |
1532 | else | |
1533 | return posn->bufpos; | |
4588ec20 JB |
1534 | } |
1535 | \f | |
1536 | static int | |
1537 | count_blanks (r) | |
1538 | register GLYPH *r; | |
1539 | { | |
1540 | register GLYPH *p = r; | |
94aa5d2d RS |
1541 | while (*p++ == SPACEGLYPH); |
1542 | return p - r - 1; | |
4588ec20 JB |
1543 | } |
1544 | ||
1545 | static int | |
1546 | count_match (str1, str2) | |
1547 | GLYPH *str1, *str2; | |
1548 | { | |
1549 | register GLYPH *p1 = str1; | |
1550 | register GLYPH *p2 = str2; | |
1551 | while (*p1++ == *p2++); | |
1552 | return p1 - str1 - 1; | |
1553 | } | |
1554 | ||
1555 | /* Char insertion/deletion cost vector, from term.c */ | |
1556 | extern int *char_ins_del_vector; | |
1557 | ||
945807a3 | 1558 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1559 | |
1560 | static void | |
502b9b64 JB |
1561 | update_line (frame, vpos) |
1562 | register FRAME_PTR frame; | |
4588ec20 JB |
1563 | int vpos; |
1564 | { | |
1565 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
60a8948a | 1566 | int *temp1; |
4588ec20 JB |
1567 | int tem; |
1568 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1569 | int save; | |
502b9b64 JB |
1570 | register struct frame_glyphs *current_frame |
1571 | = FRAME_CURRENT_GLYPHS (frame); | |
1572 | register struct frame_glyphs *desired_frame | |
1573 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1574 | |
502b9b64 JB |
1575 | if (desired_frame->highlight[vpos] |
1576 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1577 | { |
502b9b64 JB |
1578 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1579 | (current_frame->enable[vpos] ? | |
1580 | current_frame->used[vpos] : 0)); | |
1581 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1582 | } |
1583 | else | |
502b9b64 | 1584 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1585 | |
502b9b64 | 1586 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1587 | { |
1588 | olen = 0; | |
1589 | } | |
1590 | else | |
1591 | { | |
502b9b64 JB |
1592 | obody = current_frame->glyphs[vpos]; |
1593 | olen = current_frame->used[vpos]; | |
1594 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1595 | { |
1596 | if (!must_write_spaces) | |
1597 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1598 | olen--; | |
1599 | } | |
1600 | else | |
1601 | { | |
1602 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1603 | spaces all the way to the frame edge |
4588ec20 JB |
1604 | so that the reverse video extends all the way across. */ |
1605 | ||
502b9b64 | 1606 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1607 | obody[olen++] = SPACEGLYPH; |
1608 | } | |
1609 | } | |
1610 | ||
1611 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1612 | current_frame->enable[vpos] = 1; |
1613 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1614 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1615 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1616 | |
1617 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1618 | if (FRAME_X_P (frame)) |
4588ec20 | 1619 | { |
502b9b64 JB |
1620 | current_frame->pix_width[vpos] |
1621 | = current_frame->used[vpos] | |
1622 | * FONT_WIDTH (frame->display.x->font); | |
1623 | current_frame->pix_height[vpos] | |
39d1fe00 | 1624 | = frame->display.x->line_height; |
4588ec20 JB |
1625 | } |
1626 | #endif /* HAVE_X_WINDOWS */ | |
1627 | ||
502b9b64 | 1628 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1629 | { |
1630 | nlen = 0; | |
1631 | goto just_erase; | |
1632 | } | |
1633 | ||
502b9b64 JB |
1634 | nbody = desired_frame->glyphs[vpos]; |
1635 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1636 | |
1637 | /* Pretend trailing spaces are not there at all, | |
1638 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1639 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1640 | { |
1641 | if (!must_write_spaces) | |
1642 | /* We know that the previous character byte contains 0. */ | |
1643 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1644 | nlen--; | |
1645 | } | |
1646 | else | |
1647 | { | |
1648 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1649 | all the way to the frame edge |
4588ec20 JB |
1650 | so that the reverse video extends all the way across. */ |
1651 | ||
502b9b64 | 1652 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1653 | nbody[nlen++] = SPACEGLYPH; |
1654 | } | |
1655 | ||
1656 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1657 | if (!char_ins_del_ok) | |
1658 | { | |
1659 | int i,j; | |
1660 | ||
76426794 RS |
1661 | #if 0 |
1662 | if (FRAME_X_P (frame)) | |
1663 | { | |
1664 | /* Under X, erase everything we are going to rewrite, | |
1665 | and rewrite everything from the first char that's changed. | |
1666 | This is part of supporting fonts like Courier | |
1667 | whose chars can overlap outside the char width. */ | |
1668 | for (i = 0; i < nlen; i++) | |
1669 | if (i >= olen || nbody[i] != obody[i]) | |
1670 | break; | |
1671 | ||
1672 | cursor_to (vpos, i); | |
1673 | if (i != olen) | |
1674 | clear_end_of_line (olen); | |
1675 | write_glyphs (nbody + i, nlen - i); | |
1676 | } | |
1677 | else | |
1678 | {} | |
1679 | #endif /* 0 */ | |
4588ec20 JB |
1680 | for (i = 0; i < nlen; i++) |
1681 | { | |
1682 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1683 | { | |
1684 | cursor_to (vpos, i); | |
1685 | for (j = 1; (i + j < nlen && | |
1686 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1687 | j++); | |
1688 | ||
1689 | /* Output this run of non-matching chars. */ | |
1690 | write_glyphs (nbody + i, j); | |
1691 | i += j - 1; | |
1692 | ||
1693 | /* Now find the next non-match. */ | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1698 | if (olen > nlen) | |
1699 | { | |
1700 | cursor_to (vpos, nlen); | |
1701 | clear_end_of_line (olen); | |
1702 | } | |
1703 | ||
502b9b64 JB |
1704 | /* Exchange contents between current_frame and new_frame. */ |
1705 | temp = desired_frame->glyphs[vpos]; | |
1706 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1707 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1708 | |
60a8948a RS |
1709 | /* Exchange charstarts between current_frame and new_frame. */ |
1710 | temp1 = desired_frame->charstarts[vpos]; | |
1711 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1712 | current_frame->charstarts[vpos] = temp1; | |
1713 | ||
4588ec20 JB |
1714 | return; |
1715 | } | |
1716 | ||
1717 | if (!olen) | |
1718 | { | |
502b9b64 | 1719 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1720 | ? 0 : count_blanks (nbody); |
1721 | if (nlen > nsp) | |
1722 | { | |
1723 | cursor_to (vpos, nsp); | |
1724 | write_glyphs (nbody + nsp, nlen - nsp); | |
1725 | } | |
1726 | ||
502b9b64 JB |
1727 | /* Exchange contents between current_frame and new_frame. */ |
1728 | temp = desired_frame->glyphs[vpos]; | |
1729 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1730 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1731 | |
60a8948a RS |
1732 | /* Exchange charstarts between current_frame and new_frame. */ |
1733 | temp1 = desired_frame->charstarts[vpos]; | |
1734 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1735 | current_frame->charstarts[vpos] = temp1; | |
1736 | ||
4588ec20 JB |
1737 | return; |
1738 | } | |
1739 | ||
1740 | obody[olen] = 1; | |
1741 | save = nbody[nlen]; | |
1742 | nbody[nlen] = 0; | |
1743 | ||
1744 | /* Compute number of leading blanks in old and new contents. */ | |
1745 | osp = count_blanks (obody); | |
502b9b64 | 1746 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1747 | nsp = count_blanks (nbody); |
1748 | else | |
1749 | nsp = 0; | |
1750 | ||
1751 | /* Compute number of matching chars starting with first nonblank. */ | |
1752 | begmatch = count_match (obody + osp, nbody + nsp); | |
1753 | ||
1754 | /* Spaces in new match implicit space past the end of old. */ | |
1755 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1756 | if (!must_write_spaces && osp + begmatch == olen) | |
1757 | { | |
1758 | np1 = nbody + nsp; | |
1759 | while (np1[begmatch] == SPACEGLYPH) | |
1760 | begmatch++; | |
1761 | } | |
1762 | ||
1763 | /* Avoid doing insert/delete char | |
1764 | just cause number of leading spaces differs | |
1765 | when the following text does not match. */ | |
1766 | if (begmatch == 0 && osp != nsp) | |
1767 | osp = nsp = min (osp, nsp); | |
1768 | ||
1769 | /* Find matching characters at end of line */ | |
1770 | op1 = obody + olen; | |
1771 | np1 = nbody + nlen; | |
1772 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1773 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1774 | { | |
1775 | op1--; | |
1776 | np1--; | |
1777 | } | |
1778 | endmatch = obody + olen - op1; | |
1779 | ||
1780 | /* Put correct value back in nbody[nlen]. | |
1781 | This is important because direct_output_for_insert | |
1782 | can write into the line at a later point. | |
1783 | If this screws up the zero at the end of the line, re-establish it. */ | |
1784 | nbody[nlen] = save; | |
1785 | obody[olen] = 0; | |
1786 | ||
1787 | /* tem gets the distance to insert or delete. | |
1788 | endmatch is how many characters we save by doing so. | |
1789 | Is it worth it? */ | |
1790 | ||
1791 | tem = (nlen - nsp) - (olen - osp); | |
1792 | if (endmatch && tem | |
502b9b64 | 1793 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1794 | endmatch = 0; |
1795 | ||
1796 | /* nsp - osp is the distance to insert or delete. | |
1797 | If that is nonzero, begmatch is known to be nonzero also. | |
1798 | begmatch + endmatch is how much we save by doing the ins/del. | |
1799 | Is it worth it? */ | |
1800 | ||
1801 | if (nsp != osp | |
1802 | && (!char_ins_del_ok | |
502b9b64 | 1803 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1804 | { |
1805 | begmatch = 0; | |
1806 | endmatch = 0; | |
1807 | osp = nsp = min (osp, nsp); | |
1808 | } | |
1809 | ||
1810 | /* Now go through the line, inserting, writing and | |
1811 | deleting as appropriate. */ | |
1812 | ||
1813 | if (osp > nsp) | |
1814 | { | |
1815 | cursor_to (vpos, nsp); | |
1816 | delete_glyphs (osp - nsp); | |
1817 | } | |
1818 | else if (nsp > osp) | |
1819 | { | |
1820 | /* If going to delete chars later in line | |
1821 | and insert earlier in the line, | |
1822 | must delete first to avoid losing data in the insert */ | |
1823 | if (endmatch && nlen < olen + nsp - osp) | |
1824 | { | |
1825 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1826 | delete_glyphs (olen + nsp - osp - nlen); | |
1827 | olen = nlen - (nsp - osp); | |
1828 | } | |
1829 | cursor_to (vpos, osp); | |
1830 | insert_glyphs ((char *)0, nsp - osp); | |
1831 | } | |
1832 | olen += nsp - osp; | |
1833 | ||
1834 | tem = nsp + begmatch + endmatch; | |
1835 | if (nlen != tem || olen != tem) | |
1836 | { | |
1837 | cursor_to (vpos, nsp + begmatch); | |
1838 | if (!endmatch || nlen == olen) | |
1839 | { | |
1840 | /* If new text being written reaches right margin, | |
1841 | there is no need to do clear-to-eol at the end. | |
1842 | (and it would not be safe, since cursor is not | |
1843 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1844 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1845 | olen = 0; |
1846 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1847 | ||
1848 | #ifdef obsolete | |
1849 | ||
1850 | /* the following code loses disastrously if tem == nlen. | |
1851 | Rather than trying to fix that case, I am trying the simpler | |
1852 | solution found above. */ | |
1853 | ||
1854 | /* If the text reaches to the right margin, | |
1855 | it will lose one way or another (depending on AutoWrap) | |
1856 | to clear to end of line after outputting all the text. | |
1857 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1858 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1859 | { |
1860 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1861 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1862 | clear_end_of_line (olen); | |
1863 | olen = 0; /* Don't let it be cleared again later */ | |
1864 | write_glyphs (nbody + nlen - 1, 1); | |
1865 | } | |
1866 | else | |
1867 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1868 | #endif /* OBSOLETE */ | |
1869 | ||
1870 | } | |
1871 | else if (nlen > olen) | |
1872 | { | |
1873 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1874 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1875 | olen = nlen; | |
1876 | } | |
1877 | else if (olen > nlen) | |
1878 | { | |
1879 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1880 | delete_glyphs (olen - nlen); | |
1881 | olen = nlen; | |
1882 | } | |
1883 | } | |
1884 | ||
1885 | just_erase: | |
1886 | /* If any unerased characters remain after the new line, erase them. */ | |
1887 | if (olen > nlen) | |
1888 | { | |
1889 | cursor_to (vpos, nlen); | |
1890 | clear_end_of_line (olen); | |
1891 | } | |
1892 | ||
502b9b64 JB |
1893 | /* Exchange contents between current_frame and new_frame. */ |
1894 | temp = desired_frame->glyphs[vpos]; | |
1895 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1896 | current_frame->glyphs[vpos] = temp; | |
60a8948a RS |
1897 | |
1898 | /* Exchange charstarts between current_frame and new_frame. */ | |
1899 | temp1 = desired_frame->charstarts[vpos]; | |
1900 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1901 | current_frame->charstarts[vpos] = temp1; | |
4588ec20 JB |
1902 | } |
1903 | \f | |
267ad509 | 1904 | /* A vector of size >= NFRAMES + 3 * NBUFFERS + 1, containing the session's |
078b3696 KH |
1905 | frames, buffers, buffer-read-only flags, and buffer-modified-flags, |
1906 | and a trailing sentinel (so we don't need to add length checks). */ | |
1907 | static Lisp_Object frame_and_buffer_state; | |
1908 | ||
1909 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
1910 | Sframe_or_buffer_changed_p, 0, 0, 0, | |
1911 | "Return non-nil if the frame and buffer state appears to have changed.\n\ | |
1912 | The state variable is an internal vector containing all frames and buffers,\n\ | |
836d2cde | 1913 | aside from buffers whose names start with space,\n\ |
078b3696 KH |
1914 | along with the buffers' read-only and modified flags, which allows a fast\n\ |
1915 | check to see whether the menu bars might need to be recomputed.\n\ | |
1916 | If this function returns non-nil, it updates the internal vector to reflect\n\ | |
1917 | the current state.\n") | |
1918 | () | |
1919 | { | |
1920 | Lisp_Object tail, frame, buf; | |
1921 | Lisp_Object *vecp; | |
1922 | int n; | |
bd9e3e75 | 1923 | |
078b3696 KH |
1924 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1925 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1926 | { |
1927 | if (!EQ (*vecp++, frame)) | |
1928 | goto changed; | |
1929 | if (!EQ (*vecp++, XFRAME (frame)->name)) | |
1930 | goto changed; | |
1931 | } | |
50cf83f8 RS |
1932 | /* Check that the buffer info matches. |
1933 | No need to test for the end of the vector | |
1934 | because the last element of the vector is lambda | |
1935 | and that will always cause a mismatch. */ | |
078b3696 KH |
1936 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1937 | { | |
1938 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1939 | /* Ignore buffers that aren't included in buffer lists. */ |
1940 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1941 | continue; | |
078b3696 KH |
1942 | if (!EQ (*vecp++, buf)) |
1943 | goto changed; | |
1944 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
1945 | goto changed; | |
1946 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
1947 | goto changed; | |
1948 | } | |
50cf83f8 RS |
1949 | /* Detect deletion of a buffer at the end of the list. */ |
1950 | if (*vecp == Qlambda) | |
1951 | return Qnil; | |
078b3696 | 1952 | changed: |
5dad8282 | 1953 | /* Start with 1 so there is room for at least one lambda at the end. */ |
078b3696 KH |
1954 | n = 1; |
1955 | FOR_EACH_FRAME (tail, frame) | |
d1dad759 | 1956 | n += 2; |
078b3696 KH |
1957 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1958 | n += 3; | |
267ad509 KH |
1959 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ |
1960 | if (n > XVECTOR (frame_and_buffer_state)->size | |
d1dad759 KH |
1961 | || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) |
1962 | /* Add 20 extra so we grow it less often. */ | |
1963 | frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); | |
078b3696 KH |
1964 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1965 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1966 | { |
1967 | *vecp++ = frame; | |
1968 | *vecp++ = XFRAME (frame)->name; | |
1969 | } | |
078b3696 KH |
1970 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1971 | { | |
1972 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1973 | /* Ignore buffers that aren't included in buffer lists. */ |
1974 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1975 | continue; | |
078b3696 KH |
1976 | *vecp++ = buf; |
1977 | *vecp++ = XBUFFER (buf)->read_only; | |
1978 | *vecp++ = Fbuffer_modified_p (buf); | |
1979 | } | |
d1dad759 KH |
1980 | /* Fill up the vector with lambdas (always at least one). */ |
1981 | *vecp++ = Qlambda; | |
1982 | while (vecp - XVECTOR (frame_and_buffer_state)->contents | |
1983 | < XVECTOR (frame_and_buffer_state)->size) | |
267ad509 | 1984 | *vecp++ = Qlambda; |
d1dad759 KH |
1985 | /* Make sure we didn't overflow the vector. */ |
1986 | if (vecp - XVECTOR (frame_and_buffer_state)->contents | |
1987 | > XVECTOR (frame_and_buffer_state)->size) | |
1988 | abort (); | |
078b3696 KH |
1989 | return Qt; |
1990 | } | |
1991 | \f | |
4588ec20 JB |
1992 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
1993 | 1, 1, "FOpen termscript file: ", | |
1994 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1995 | FILE = nil means just close any termscript file currently open.") | |
1996 | (file) | |
1997 | Lisp_Object file; | |
1998 | { | |
1999 | if (termscript != 0) fclose (termscript); | |
2000 | termscript = 0; | |
2001 | ||
efb859b4 | 2002 | if (! NILP (file)) |
4588ec20 JB |
2003 | { |
2004 | file = Fexpand_file_name (file, Qnil); | |
2005 | termscript = fopen (XSTRING (file)->data, "w"); | |
2006 | if (termscript == 0) | |
2007 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
2008 | } | |
2009 | return Qnil; | |
2010 | } | |
2011 | \f | |
2012 | ||
2013 | #ifdef SIGWINCH | |
efb859b4 | 2014 | SIGTYPE |
61cbef47 RS |
2015 | window_change_signal (signalnum) /* If we don't have an argument, */ |
2016 | int signalnum; /* some compilers complain in signal calls. */ | |
4588ec20 JB |
2017 | { |
2018 | int width, height; | |
2019 | extern int errno; | |
2020 | int old_errno = errno; | |
2021 | ||
502b9b64 | 2022 | get_frame_size (&width, &height); |
4588ec20 | 2023 | |
502b9b64 JB |
2024 | /* The frame size change obviously applies to a termcap-controlled |
2025 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 2026 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 2027 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
2028 | but don't reallocate the data structures now. Let that be done |
2029 | later outside of the signal handler. */ | |
2030 | ||
2031 | { | |
35f56f96 | 2032 | Lisp_Object tail, frame; |
4588ec20 | 2033 | |
35f56f96 | 2034 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2035 | { |
35f56f96 | 2036 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 2037 | { |
35f56f96 | 2038 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
2039 | break; |
2040 | } | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | signal (SIGWINCH, window_change_signal); | |
2045 | errno = old_errno; | |
2046 | } | |
2047 | #endif /* SIGWINCH */ | |
2048 | ||
2049 | ||
502b9b64 | 2050 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
2051 | |
2052 | do_pending_window_change () | |
2053 | { | |
2054 | /* If window_change_signal should have run before, run it now. */ | |
2055 | while (delayed_size_change) | |
2056 | { | |
35f56f96 | 2057 | Lisp_Object tail, frame; |
4588ec20 JB |
2058 | |
2059 | delayed_size_change = 0; | |
2060 | ||
35f56f96 | 2061 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2062 | { |
35f56f96 JB |
2063 | FRAME_PTR f = XFRAME (frame); |
2064 | ||
502b9b64 JB |
2065 | int height = FRAME_NEW_HEIGHT (f); |
2066 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 2067 | |
08f7aa3e | 2068 | if (height != 0 || width != 0) |
b6a65ac2 | 2069 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
2070 | } |
2071 | } | |
2072 | } | |
2073 | ||
2074 | ||
502b9b64 | 2075 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 2076 | indicate no change is to take place. |
4588ec20 | 2077 | |
b6a65ac2 JB |
2078 | If DELAY is non-zero, then assume we're being called from a signal |
2079 | handler, and queue the change for later - perhaps the next | |
2080 | redisplay. Since this tries to resize windows, we can't call it | |
2081 | from a signal handler. */ | |
2082 | ||
45140e01 RS |
2083 | change_frame_size (f, newheight, newwidth, pretend, delay) |
2084 | register FRAME_PTR f; | |
2085 | int newheight, newwidth, pretend; | |
2086 | { | |
2087 | Lisp_Object tail, frame; | |
2088 | if (FRAME_TERMCAP_P (f)) | |
2089 | { | |
2090 | /* When using termcap, all frames use the same screen, | |
2091 | so a change in size affects all termcap frames. */ | |
2092 | FOR_EACH_FRAME (tail, frame) | |
2093 | if (FRAME_TERMCAP_P (XFRAME (frame))) | |
2094 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, | |
2095 | pretend, delay); | |
2096 | } | |
2097 | else | |
2098 | change_frame_size_1 (f, newheight, newwidth, pretend, delay); | |
2099 | } | |
2100 | ||
2101 | static void | |
2102 | change_frame_size_1 (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 2103 | register FRAME_PTR frame; |
a1d789d0 | 2104 | int newheight, newwidth, pretend, delay; |
4588ec20 JB |
2105 | { |
2106 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 2107 | if (delay) |
4588ec20 | 2108 | { |
b6a65ac2 | 2109 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 2110 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
2111 | delayed_size_change = 1; |
2112 | return; | |
2113 | } | |
2114 | ||
502b9b64 JB |
2115 | /* This size-change overrides any pending one for this frame. */ |
2116 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
2117 | FRAME_NEW_WIDTH (frame) = 0; |
2118 | ||
08f7aa3e | 2119 | /* If an argument is zero, set it to the current value. */ |
b6a65ac2 JB |
2120 | newheight || (newheight = FRAME_HEIGHT (frame)); |
2121 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 2122 | |
b6a65ac2 JB |
2123 | /* Round up to the smallest acceptable size. */ |
2124 | check_frame_size (frame, &newheight, &newwidth); | |
2125 | ||
2126 | /* If we're not changing the frame size, quit now. */ | |
2127 | if (newheight == FRAME_HEIGHT (frame) | |
2128 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
2129 | return; |
2130 | ||
b6a65ac2 | 2131 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 2132 | { |
b6a65ac2 | 2133 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 2134 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 2135 | { |
502b9b64 JB |
2136 | /* Frame has both root and minibuffer. */ |
2137 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 2138 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
a5d8b611 KH |
2139 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top, |
2140 | newheight - 1); | |
502b9b64 | 2141 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
2142 | } |
2143 | else | |
502b9b64 | 2144 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
2145 | set_window_height (FRAME_ROOT_WINDOW (frame), |
2146 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
2147 | |
2148 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
2149 | FrameRows = newheight; | |
4588ec20 JB |
2150 | |
2151 | #if 0 | |
502b9b64 | 2152 | if (frame->output_method == output_termcap) |
4588ec20 | 2153 | { |
b6a65ac2 | 2154 | frame_height = newheight; |
4588ec20 | 2155 | if (!pretend) |
b6a65ac2 | 2156 | FrameRows = newheight; |
4588ec20 JB |
2157 | } |
2158 | #endif | |
2159 | } | |
2160 | ||
b6a65ac2 | 2161 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 2162 | { |
502b9b64 | 2163 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 2164 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 2165 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 2166 | |
b6a65ac2 | 2167 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 2168 | FrameCols = newwidth; |
4588ec20 | 2169 | #if 0 |
502b9b64 | 2170 | if (frame->output_method == output_termcap) |
4588ec20 | 2171 | { |
502b9b64 | 2172 | frame_width = newwidth; |
4588ec20 | 2173 | if (!pretend) |
502b9b64 | 2174 | FrameCols = newwidth; |
4588ec20 JB |
2175 | } |
2176 | #endif | |
2177 | } | |
2178 | ||
b6a65ac2 JB |
2179 | FRAME_HEIGHT (frame) = newheight; |
2180 | FRAME_WIDTH (frame) = newwidth; | |
986e61b8 RS |
2181 | |
2182 | if (FRAME_CURSOR_X (frame) >= FRAME_WIDTH (frame)) | |
2183 | FRAME_CURSOR_X (frame) = FRAME_WIDTH (frame) - 1; | |
2184 | if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) | |
2185 | FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; | |
2186 | ||
502b9b64 JB |
2187 | remake_frame_glyphs (frame); |
2188 | calculate_costs (frame); | |
4588ec20 JB |
2189 | } |
2190 | \f | |
2191 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
2192 | Ssend_string_to_terminal, 1, 1, 0, | |
2193 | "Send STRING to the terminal without alteration.\n\ | |
2194 | Control characters in STRING will have terminal-dependent effects.") | |
2195 | (str) | |
2196 | Lisp_Object str; | |
2197 | { | |
2198 | CHECK_STRING (str, 0); | |
2199 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
2200 | fflush (stdout); | |
2201 | if (termscript) | |
2202 | { | |
2203 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
2204 | fflush (termscript); | |
2205 | } | |
2206 | return Qnil; | |
2207 | } | |
2208 | ||
2209 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
2210 | "Beep, or flash the screen.\n\ | |
2211 | Also, unless an argument is given,\n\ | |
2212 | terminate any keyboard macro currently executing.") | |
2213 | (arg) | |
2214 | Lisp_Object arg; | |
2215 | { | |
efb859b4 | 2216 | if (!NILP (arg)) |
4588ec20 | 2217 | { |
7fa788da RS |
2218 | if (noninteractive) |
2219 | putchar (07); | |
2220 | else | |
2221 | ring_bell (); | |
4588ec20 JB |
2222 | fflush (stdout); |
2223 | } | |
2224 | else | |
2225 | bitch_at_user (); | |
2226 | ||
2227 | return Qnil; | |
2228 | } | |
2229 | ||
2230 | bitch_at_user () | |
2231 | { | |
2232 | if (noninteractive) | |
2233 | putchar (07); | |
2234 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
2235 | error ("Keyboard macro terminated by a command ringing the bell"); | |
2236 | else | |
2237 | ring_bell (); | |
2238 | fflush (stdout); | |
2239 | } | |
2240 | ||
2241 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 2242 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
2243 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2244 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2245 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2246 | Emacs was built without floating point support.\n\ | |
2247 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
2248 | (seconds, milliseconds) |
2249 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 2250 | { |
767229f8 | 2251 | int sec, usec; |
4588ec20 | 2252 | |
767229f8 | 2253 | if (NILP (milliseconds)) |
e9c9a718 | 2254 | XSETINT (milliseconds, 0); |
767229f8 JB |
2255 | else |
2256 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2257 | usec = XINT (milliseconds) * 1000; |
2258 | ||
2259 | #ifdef LISP_FLOAT_TYPE | |
2260 | { | |
2261 | double duration = extract_float (seconds); | |
2262 | sec = (int) duration; | |
2263 | usec += (duration - sec) * 1000000; | |
2264 | } | |
2265 | #else | |
2266 | CHECK_NUMBER (seconds, 0); | |
2267 | sec = XINT (seconds); | |
2268 | #endif | |
4588ec20 | 2269 | |
a41f8bed | 2270 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2271 | if (sec == 0 && usec != 0) |
2272 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 2273 | #endif |
767229f8 JB |
2274 | |
2275 | /* Assure that 0 <= usec < 1000000. */ | |
2276 | if (usec < 0) | |
2277 | { | |
2278 | /* We can't rely on the rounding being correct if user is negative. */ | |
2279 | if (-1000000 < usec) | |
2280 | sec--, usec += 1000000; | |
2281 | else | |
2282 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 2283 | } |
767229f8 JB |
2284 | else |
2285 | sec += usec / 1000000, usec %= 1000000; | |
2286 | ||
5c48f0da | 2287 | if (sec <= 0) |
767229f8 | 2288 | return Qnil; |
4588ec20 | 2289 | |
f76475ad JB |
2290 | { |
2291 | Lisp_Object zero; | |
2292 | ||
a5d8b611 | 2293 | XSETFASTINT (zero, 0); |
f76475ad JB |
2294 | wait_reading_process_input (sec, usec, zero, 0); |
2295 | } | |
d1af74e9 | 2296 | |
767229f8 JB |
2297 | /* We should always have wait_reading_process_input; we have a dummy |
2298 | implementation for systems which don't support subprocesses. */ | |
2299 | #if 0 | |
2300 | /* No wait_reading_process_input */ | |
4588ec20 JB |
2301 | immediate_quit = 1; |
2302 | QUIT; | |
2303 | ||
2304 | #ifdef VMS | |
2305 | sys_sleep (sec); | |
2306 | #else /* not VMS */ | |
2307 | /* The reason this is done this way | |
2308 | (rather than defined (H_S) && defined (H_T)) | |
2309 | is because the VMS preprocessor doesn't grok `defined' */ | |
2310 | #ifdef HAVE_SELECT | |
a41f8bed JB |
2311 | EMACS_GET_TIME (end_time); |
2312 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 2313 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 2314 | |
4588ec20 JB |
2315 | while (1) |
2316 | { | |
a41f8bed JB |
2317 | EMACS_GET_TIME (timeout); |
2318 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2319 | if (EMACS_TIME_NEG_P (timeout) | |
2320 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
2321 | break; |
2322 | } | |
4588ec20 JB |
2323 | #else /* not HAVE_SELECT */ |
2324 | sleep (sec); | |
2325 | #endif /* HAVE_SELECT */ | |
2326 | #endif /* not VMS */ | |
2327 | ||
2328 | immediate_quit = 0; | |
2329 | #endif /* no subprocesses */ | |
2330 | ||
2331 | return Qnil; | |
2332 | } | |
2333 | ||
f76475ad JB |
2334 | /* This is just like wait_reading_process_input, except that |
2335 | it does the redisplay. | |
2336 | ||
ea0d86af | 2337 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 2338 | waiting for input as well. */ |
4588ec20 | 2339 | |
f76475ad JB |
2340 | Lisp_Object |
2341 | sit_for (sec, usec, reading, display) | |
2342 | int sec, usec, reading, display; | |
2343 | { | |
2344 | Lisp_Object read_kbd; | |
4588ec20 JB |
2345 | |
2346 | if (detect_input_pending ()) | |
2347 | return Qnil; | |
4588ec20 | 2348 | |
f76475ad JB |
2349 | if (display) |
2350 | redisplay_preserve_echo_area (); | |
4588ec20 | 2351 | |
dfdb645c JB |
2352 | if (sec == 0 && usec == 0) |
2353 | return Qt; | |
2354 | ||
4588ec20 | 2355 | #ifdef SIGIO |
8fc798e9 | 2356 | gobble_input (0); |
f76475ad JB |
2357 | #endif |
2358 | ||
e9c9a718 | 2359 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
2360 | wait_reading_process_input (sec, usec, read_kbd, display); |
2361 | ||
d1af74e9 | 2362 | |
500ab754 JB |
2363 | /* wait_reading_process_input should always be available now; it is |
2364 | simulated in a simple way on systems that don't support | |
2365 | subprocesses. */ | |
2366 | #if 0 | |
2367 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
2368 | immediate_quit = 1; |
2369 | QUIT; | |
2370 | ||
2371 | waitchannels = 1; | |
2372 | #ifdef VMS | |
f76475ad | 2373 | input_wait_timeout (XINT (arg)); |
4588ec20 | 2374 | #else /* not VMS */ |
d1af74e9 JB |
2375 | #ifndef HAVE_TIMEVAL |
2376 | timeout_sec = sec; | |
2377 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
2378 | #else /* HAVE_TIMEVAL */ | |
2379 | timeout.tv_sec = sec; | |
2380 | timeout.tv_usec = usec; | |
4588ec20 | 2381 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 2382 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
2383 | #endif /* not VMS */ |
2384 | ||
2385 | immediate_quit = 0; | |
d1af74e9 | 2386 | #endif |
4588ec20 JB |
2387 | |
2388 | return detect_input_pending () ? Qnil : Qt; | |
2389 | } | |
2390 | ||
f76475ad | 2391 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2392 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2393 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2394 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2395 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2396 | Emacs was built without floating point support.\n\ | |
2397 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
f76475ad JB |
2398 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
2399 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
2400 | if input is available before it starts.\n\ | |
2401 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2402 | (seconds, milliseconds, nodisp) |
2403 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2404 | { |
767229f8 | 2405 | int sec, usec; |
f76475ad | 2406 | |
767229f8 | 2407 | if (NILP (milliseconds)) |
e9c9a718 | 2408 | XSETINT (milliseconds, 0); |
767229f8 JB |
2409 | else |
2410 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2411 | usec = XINT (milliseconds) * 1000; |
2412 | ||
2413 | #ifdef LISP_FLOAT_TYPE | |
2414 | { | |
2415 | double duration = extract_float (seconds); | |
2416 | sec = (int) duration; | |
2417 | usec += (duration - sec) * 1000000; | |
2418 | } | |
2419 | #else | |
2420 | CHECK_NUMBER (seconds, 0); | |
2421 | sec = XINT (seconds); | |
2422 | #endif | |
f76475ad | 2423 | |
f76475ad | 2424 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2425 | if (usec != 0 && sec == 0) |
2426 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2427 | #endif |
f76475ad | 2428 | |
ea0d86af RS |
2429 | if (NILP (nodisp)) |
2430 | prepare_menu_bars (); | |
f76475ad JB |
2431 | return sit_for (sec, usec, 0, NILP (nodisp)); |
2432 | } | |
4588ec20 JB |
2433 | \f |
2434 | char *terminal_type; | |
2435 | ||
2436 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2437 | /* Determine terminal type and set terminal_driver */ | |
2438 | /* Then invoke its decoding routine to set up variables | |
2439 | in the terminal package */ | |
2440 | ||
2441 | init_display () | |
2442 | { | |
2443 | #ifdef HAVE_X_WINDOWS | |
2444 | extern int display_arg; | |
2445 | #endif | |
2446 | ||
2447 | meta_key = 0; | |
2448 | inverse_video = 0; | |
2449 | cursor_in_echo_area = 0; | |
2450 | terminal_type = (char *) 0; | |
2451 | ||
1315c181 JB |
2452 | /* Now is the time to initialize this; it's used by init_sys_modes |
2453 | during startup. */ | |
2454 | Vwindow_system = Qnil; | |
4588ec20 | 2455 | |
1315c181 JB |
2456 | /* If the user wants to use a window system, we shouldn't bother |
2457 | initializing the terminal. This is especially important when the | |
2458 | terminal is so dumb that emacs gives up before and doesn't bother | |
2459 | using the window system. | |
4588ec20 | 2460 | |
1315c181 JB |
2461 | If the DISPLAY environment variable is set, try to use X, and die |
2462 | with an error message if that doesn't work. */ | |
4588ec20 JB |
2463 | |
2464 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2465 | if (! display_arg) |
2466 | { | |
2467 | #ifdef VMS | |
5de9f849 | 2468 | display_arg = (getenv ("DECW$DISPLAY") != 0); |
d460af17 | 2469 | #else |
5de9f849 | 2470 | display_arg = (getenv ("DISPLAY") != 0); |
d460af17 | 2471 | #endif |
f040093a | 2472 | } |
d460af17 JB |
2473 | |
2474 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2475 | { |
2476 | Vwindow_system = intern ("x"); | |
2477 | #ifdef HAVE_X11 | |
2478 | Vwindow_system_version = make_number (11); | |
2479 | #else | |
2480 | Vwindow_system_version = make_number (10); | |
2481 | #endif | |
2482 | return; | |
2483 | } | |
2484 | #endif /* HAVE_X_WINDOWS */ | |
2485 | ||
2486 | /* If no window system has been specified, try to use the terminal. */ | |
2487 | if (! isatty (0)) | |
2488 | { | |
2489 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2490 | exit (1); | |
2491 | } | |
2492 | ||
2493 | /* Look at the TERM variable */ | |
2494 | terminal_type = (char *) getenv ("TERM"); | |
2495 | if (!terminal_type) | |
2496 | { | |
2497 | #ifdef VMS | |
2498 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2499 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2500 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2501 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2502 | #else | |
2503 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2504 | #endif | |
2505 | exit (1); | |
2506 | } | |
2507 | ||
2508 | #ifdef VMS | |
2509 | /* VMS DCL tends to upcase things, so downcase term type. | |
2510 | Hardly any uppercase letters in terminal types; should be none. */ | |
2511 | { | |
2512 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2513 | char *p; | |
2514 | ||
2515 | strcpy (new, terminal_type); | |
2516 | ||
2517 | for (p = new; *p; p++) | |
2518 | if (isupper (*p)) | |
2519 | *p = tolower (*p); | |
2520 | ||
2521 | terminal_type = new; | |
2522 | } | |
2523 | #endif | |
2524 | ||
2525 | term_init (terminal_type); | |
2526 | ||
502b9b64 JB |
2527 | remake_frame_glyphs (selected_frame); |
2528 | calculate_costs (selected_frame); | |
4588ec20 JB |
2529 | |
2530 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2531 | FRAME_CURSOR_X (selected_frame) = 0; |
2532 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2533 | |
2534 | #ifdef SIGWINCH | |
2535 | #ifndef CANNOT_DUMP | |
2536 | if (initialized) | |
2537 | #endif /* CANNOT_DUMP */ | |
2538 | signal (SIGWINCH, window_change_signal); | |
2539 | #endif /* SIGWINCH */ | |
2540 | } | |
2541 | \f | |
2542 | syms_of_display () | |
2543 | { | |
502b9b64 JB |
2544 | #ifdef MULTI_FRAME |
2545 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2546 | #endif |
2547 | defsubr (&Sredraw_display); | |
078b3696 | 2548 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
2549 | defsubr (&Sopen_termscript); |
2550 | defsubr (&Sding); | |
2551 | defsubr (&Ssit_for); | |
2552 | defsubr (&Ssleep_for); | |
2553 | defsubr (&Ssend_string_to_terminal); | |
2554 | ||
d1dad759 | 2555 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
2556 | staticpro (&frame_and_buffer_state); |
2557 | ||
4588ec20 | 2558 | DEFVAR_INT ("baud-rate", &baud_rate, |
eb285955 | 2559 | "*The output baud rate of the terminal.\n\ |
4588ec20 JB |
2560 | On most systems, changing this value will affect the amount of padding\n\ |
2561 | and the other strategic decisions made during redisplay."); | |
2562 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2563 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2564 | This means everything is in inverse video which otherwise would not be."); |
2565 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2566 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2567 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2568 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2569 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2570 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2571 | It is up to you to set this variable if your terminal can do that."); |
2572 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2573 | "A symbol naming the window-system under which Emacs is running\n\ | |
2574 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2575 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2576 | "The version number of the window system in use.\n\ | |
2577 | For X windows, this is 10 or 11."); | |
2578 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2579 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2580 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2581 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2582 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2583 | Each element can be:\n\ | |
2584 | integer: a glyph code which this glyph is an alias for.\n\ | |
2585 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2586 | nil: this glyph mod 256 is char code to output,\n\ | |
6666f05a | 2587 | and this glyph / 256 is face code for X windows (see `face-id')."); |
4588ec20 JB |
2588 | Vglyph_table = Qnil; |
2589 | ||
2590 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2591 | "Display table to use for buffers that specify none.\n\ | |
2592 | See `buffer-display-table' for more information."); | |
2593 | Vstandard_display_table = Qnil; | |
2594 | ||
2595 | /* Initialize `window-system', unless init_display already decided it. */ | |
2596 | #ifdef CANNOT_DUMP | |
2597 | if (noninteractive) | |
2598 | #endif | |
2599 | { | |
2600 | Vwindow_system = Qnil; | |
2601 | Vwindow_system_version = Qnil; | |
2602 | } | |
2603 | } |