Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
60a8948a | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94 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 | |
a41f8bed | 75 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 76 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 77 | |
502b9b64 | 78 | int frame_garbaged; |
4588ec20 JB |
79 | |
80 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
81 | ||
82 | int display_completed; | |
83 | ||
84 | /* Lisp variable visible-bell; enables use of screen-flash | |
85 | instead of audible bell. */ | |
86 | ||
87 | int visible_bell; | |
88 | ||
502b9b64 | 89 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
90 | |
91 | int inverse_video; | |
92 | ||
93 | /* Line speed of the terminal. */ | |
94 | ||
95 | int baud_rate; | |
96 | ||
97 | /* nil or a symbol naming the window system under which emacs is | |
98 | running ('x is the only current possibility). */ | |
99 | ||
100 | Lisp_Object Vwindow_system; | |
101 | ||
102 | /* Version number of X windows: 10, 11 or nil. */ | |
103 | Lisp_Object Vwindow_system_version; | |
104 | ||
105 | /* Vector of glyph definitions. Indexed by glyph number, | |
106 | the contents are a string which is how to output the glyph. | |
107 | ||
108 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
109 | as a character code. */ | |
110 | ||
111 | Lisp_Object Vglyph_table; | |
112 | ||
113 | /* Display table to use for vectors that don't specify their own. */ | |
114 | ||
115 | Lisp_Object Vstandard_display_table; | |
116 | ||
117 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
118 | so put cursor on minibuffer after the prompt. |
119 | positive means at end of text in echo area; | |
120 | negative means at beginning of line. */ | |
4588ec20 JB |
121 | int cursor_in_echo_area; |
122 | \f | |
502b9b64 JB |
123 | /* The currently selected frame. |
124 | In a single-frame version, this variable always remains 0. */ | |
4588ec20 | 125 | |
502b9b64 | 126 | FRAME_PTR selected_frame; |
4588ec20 | 127 | |
502b9b64 JB |
128 | /* A frame which is not just a minibuffer, or 0 if there are no such |
129 | frames. This is usually the most recent such frame that was | |
130 | selected. In a single-frame version, this variable always remains 0. */ | |
131 | FRAME_PTR last_nonminibuf_frame; | |
e5d77022 | 132 | |
502b9b64 | 133 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
134 | exist inside frame objects lives in the following structure instead. |
135 | ||
136 | NOTE: the_only_frame is not checked for garbage collection; don't | |
eb8c3be9 | 137 | store collectible objects in any of its fields! |
190721ac JB |
138 | |
139 | You're not/The only frame in town/... */ | |
4588ec20 | 140 | |
502b9b64 JB |
141 | #ifndef MULTI_FRAME |
142 | struct frame the_only_frame; | |
e5d77022 | 143 | #endif |
4588ec20 JB |
144 | |
145 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
146 | which is used inside `update_frame' to hold the old contents |
147 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
148 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
149 | /* Length of vector currently allocated. */ |
150 | int ophys_lines_length; | |
151 | ||
152 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
153 | ||
154 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
155 | ||
156 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
157 | ||
4588ec20 | 158 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 159 | \f |
502b9b64 | 160 | #ifdef MULTI_FRAME |
4588ec20 | 161 | |
502b9b64 JB |
162 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
163 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
164 | (frame) | |
165 | Lisp_Object frame; | |
4588ec20 | 166 | { |
502b9b64 | 167 | FRAME_PTR f; |
4588ec20 | 168 | |
502b9b64 JB |
169 | CHECK_LIVE_FRAME (frame, 0); |
170 | f = XFRAME (frame); | |
171 | update_begin (f); | |
4588ec20 | 172 | /* set_terminal_modes (); */ |
502b9b64 | 173 | clear_frame (); |
b6a65ac2 | 174 | clear_frame_records (f); |
502b9b64 | 175 | update_end (f); |
4588ec20 | 176 | fflush (stdout); |
4588ec20 JB |
177 | windows_or_buffers_changed++; |
178 | /* Mark all windows as INaccurate, | |
179 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
180 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
181 | f->garbaged = 0; | |
4588ec20 JB |
182 | return Qnil; |
183 | } | |
184 | ||
502b9b64 JB |
185 | redraw_frame (f) |
186 | FRAME_PTR f; | |
4588ec20 | 187 | { |
502b9b64 JB |
188 | Lisp_Object frame; |
189 | XSET (frame, Lisp_Frame, f); | |
190 | Fredraw_frame (frame); | |
4588ec20 JB |
191 | } |
192 | ||
35f56f96 | 193 | #else |
4588ec20 | 194 | |
d8039c5c | 195 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
35f56f96 JB |
196 | "Clear frame FRAME and output again what is supposed to appear on it.") |
197 | (frame) | |
198 | Lisp_Object frame; | |
4588ec20 JB |
199 | { |
200 | update_begin (0); | |
201 | set_terminal_modes (); | |
502b9b64 | 202 | clear_frame (); |
4588ec20 JB |
203 | update_end (0); |
204 | fflush (stdout); | |
502b9b64 | 205 | clear_frame_records (0); |
4588ec20 JB |
206 | windows_or_buffers_changed++; |
207 | /* Mark all windows as INaccurate, | |
208 | so that every window will have its redisplay done. */ | |
b5c685f4 | 209 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
210 | return Qnil; |
211 | } | |
212 | ||
35f56f96 JB |
213 | #endif |
214 | ||
215 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
216 | "Clear and redisplay all visible frames.") | |
217 | () | |
218 | { | |
219 | Lisp_Object tail, frame; | |
220 | ||
221 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 222 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
223 | Fredraw_frame (frame); |
224 | ||
225 | return Qnil; | |
226 | } | |
227 | ||
9223a96a RS |
228 | /* This is used when frame_garbaged is set. |
229 | Redraw the individual frames marked as garbaged. */ | |
230 | ||
231 | void | |
232 | redraw_garbaged_frames () | |
233 | { | |
234 | Lisp_Object tail, frame; | |
235 | ||
236 | FOR_EACH_FRAME (tail, frame) | |
237 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
238 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
239 | Fredraw_frame (frame); | |
240 | } | |
241 | ||
4588ec20 | 242 | \f |
502b9b64 JB |
243 | static struct frame_glyphs * |
244 | make_frame_glyphs (frame, empty) | |
245 | register FRAME_PTR frame; | |
4588ec20 JB |
246 | int empty; |
247 | { | |
248 | register int i; | |
502b9b64 JB |
249 | register width = FRAME_WIDTH (frame); |
250 | register height = FRAME_HEIGHT (frame); | |
60a8948a RS |
251 | register struct frame_glyphs *new |
252 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 253 | |
502b9b64 | 254 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
255 | new->height = height; |
256 | new->width = width; | |
257 | new->used = (int *) xmalloc (height * sizeof (int)); | |
258 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
60a8948a | 259 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
4588ec20 JB |
260 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
261 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
262 | bzero (new->enable, height * sizeof (char)); | |
263 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
264 | ||
265 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 266 | if (FRAME_X_P (frame)) |
4588ec20 | 267 | { |
4588ec20 JB |
268 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
269 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
270 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
271 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 272 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
273 | } |
274 | #endif | |
275 | ||
276 | if (empty) | |
277 | { | |
278 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 279 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 | 280 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
d52bad65 | 281 | unsigned int total_charstarts = (width + 2) * sizeof (int); |
4588ec20 JB |
282 | |
283 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
284 | bzero (new->total_contents, total_glyphs); | |
d52bad65 RS |
285 | |
286 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
287 | bzero (new->total_charstarts, total_glyphs); | |
4588ec20 JB |
288 | } |
289 | else | |
290 | { | |
291 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
292 | ||
293 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
294 | bzero (new->total_contents, total_glyphs); | |
295 | for (i = 0; i < height; i++) | |
296 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
60a8948a RS |
297 | |
298 | if (!FRAME_TERMCAP_P (frame)) | |
299 | { | |
300 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); | |
301 | ||
302 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
303 | bzero (new->total_charstarts, total_charstarts); | |
304 | for (i = 0; i < height; i++) | |
305 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; | |
306 | } | |
307 | else | |
308 | { | |
309 | /* Without a window system, we don't really need charstarts. | |
310 | So use a small amount of space to make enough data structure | |
311 | to prevent crashes in display_text_line. */ | |
312 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); | |
313 | for (i = 0; i < height; i++) | |
314 | new->charstarts[i] = new->total_charstarts; | |
315 | } | |
4588ec20 JB |
316 | } |
317 | ||
318 | return new; | |
319 | } | |
320 | ||
321 | static void | |
502b9b64 JB |
322 | free_frame_glyphs (frame, glyphs) |
323 | FRAME_PTR frame; | |
324 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
325 | { |
326 | if (glyphs->total_contents) | |
9ac0d9e0 | 327 | xfree (glyphs->total_contents); |
60a8948a RS |
328 | if (glyphs->total_charstarts) |
329 | xfree (glyphs->total_charstarts); | |
4588ec20 | 330 | |
9ac0d9e0 JB |
331 | xfree (glyphs->used); |
332 | xfree (glyphs->glyphs); | |
333 | xfree (glyphs->highlight); | |
334 | xfree (glyphs->enable); | |
335 | xfree (glyphs->bufp); | |
60a8948a RS |
336 | if (glyphs->charstarts) |
337 | xfree (glyphs->charstarts); | |
4588ec20 JB |
338 | |
339 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 340 | if (FRAME_X_P (frame)) |
4588ec20 | 341 | { |
9ac0d9e0 JB |
342 | xfree (glyphs->top_left_x); |
343 | xfree (glyphs->top_left_y); | |
344 | xfree (glyphs->pix_width); | |
345 | xfree (glyphs->pix_height); | |
346 | xfree (glyphs->max_ascent); | |
4588ec20 JB |
347 | } |
348 | #endif | |
349 | ||
9ac0d9e0 | 350 | xfree (glyphs); |
4588ec20 JB |
351 | } |
352 | ||
353 | static void | |
502b9b64 JB |
354 | remake_frame_glyphs (frame) |
355 | FRAME_PTR frame; | |
4588ec20 | 356 | { |
502b9b64 JB |
357 | if (FRAME_CURRENT_GLYPHS (frame)) |
358 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
359 | if (FRAME_DESIRED_GLYPHS (frame)) | |
360 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
361 | if (FRAME_TEMP_GLYPHS (frame)) | |
362 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
363 | ||
364 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
365 | { |
366 | /* Reallocate the frame's message buffer; remember that | |
367 | echo_area_glyphs may be pointing here. */ | |
368 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
369 | ||
370 | FRAME_MESSAGE_BUF (frame) | |
371 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
372 | FRAME_WIDTH (frame) + 1); | |
373 | ||
374 | if (echo_area_glyphs == old_message_buf) | |
375 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
376 | if (previous_echo_glyphs == old_message_buf) | |
377 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
378 | } | |
4588ec20 | 379 | else |
502b9b64 JB |
380 | FRAME_MESSAGE_BUF (frame) |
381 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 382 | |
502b9b64 JB |
383 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
384 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
385 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
386 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
387 | } |
388 | \f | |
502b9b64 | 389 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
390 | |
391 | static int | |
392 | line_hash_code (m, vpos) | |
502b9b64 | 393 | register struct frame_glyphs *m; |
4588ec20 JB |
394 | int vpos; |
395 | { | |
396 | register GLYPH *body, *end; | |
397 | register int h = 0; | |
398 | ||
399 | if (!m->enable[vpos]) | |
400 | return 0; | |
401 | ||
94aa5d2d | 402 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
403 | so as to encourage scrolling to leave them in place. */ |
404 | if (m->highlight[vpos]) | |
405 | return -1; | |
406 | ||
407 | body = m->glyphs[vpos]; | |
408 | ||
409 | if (must_write_spaces) | |
410 | while (1) | |
411 | { | |
412 | GLYPH g = *body++; | |
413 | ||
414 | if (g == 0) | |
415 | break; | |
416 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
417 | } | |
418 | else | |
419 | while (1) | |
420 | { | |
421 | GLYPH g = *body++; | |
422 | ||
423 | if (g == 0) | |
424 | break; | |
425 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
426 | } | |
427 | ||
428 | if (h) | |
429 | return h; | |
430 | return 1; | |
431 | } | |
432 | ||
433 | /* Return number of characters in line in M at vpos VPOS, | |
434 | except don't count leading and trailing spaces | |
435 | unless the terminal requires those to be explicitly output. */ | |
436 | ||
437 | static unsigned int | |
438 | line_draw_cost (m, vpos) | |
502b9b64 | 439 | struct frame_glyphs *m; |
4588ec20 JB |
440 | int vpos; |
441 | { | |
442 | register GLYPH *beg = m->glyphs[vpos]; | |
443 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
444 | register int i; | |
445 | register int tlen = GLYPH_TABLE_LENGTH; | |
446 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
447 | ||
448 | /* Ignore trailing and leading spaces if we can. */ | |
449 | if (!must_write_spaces) | |
450 | { | |
451 | while ((end != beg) && (*end == SPACEGLYPH)) | |
452 | --end; | |
453 | if (end == beg) | |
454 | return (0); /* All blank line. */ | |
455 | ||
456 | while (*beg == SPACEGLYPH) | |
457 | ++beg; | |
458 | } | |
459 | ||
460 | /* If we don't have a glyph-table, each glyph is one character, | |
461 | so return the number of glyphs. */ | |
462 | if (tbase == 0) | |
463 | return end - beg; | |
464 | ||
465 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
466 | i = 0; | |
467 | while ((beg <= end) && *beg) | |
468 | { | |
469 | register GLYPH g = *beg++; | |
470 | ||
471 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
472 | i += 1; | |
473 | else | |
474 | i += GLYPH_LENGTH (tbase, g); | |
475 | } | |
476 | return i; | |
477 | } | |
478 | \f | |
479 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
480 | ||
481 | The only other interface into redisplay is through setting | |
502b9b64 JB |
482 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
483 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
484 | |
485 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
486 | ||
502b9b64 | 487 | cancel_line (vpos, frame) |
4588ec20 | 488 | int vpos; |
502b9b64 | 489 | register FRAME_PTR frame; |
4588ec20 | 490 | { |
502b9b64 | 491 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
492 | } |
493 | ||
502b9b64 JB |
494 | clear_frame_records (frame) |
495 | register FRAME_PTR frame; | |
4588ec20 | 496 | { |
502b9b64 | 497 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
498 | } |
499 | ||
500 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
501 | ||
502 | void | |
502b9b64 JB |
503 | get_display_line (frame, vpos, hpos) |
504 | register FRAME_PTR frame; | |
4588ec20 JB |
505 | int vpos; |
506 | register int hpos; | |
507 | { | |
502b9b64 JB |
508 | register struct frame_glyphs *glyphs; |
509 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
510 | register GLYPH *p; |
511 | ||
7c3c72ec | 512 | if (vpos < 0) |
4588ec20 JB |
513 | abort (); |
514 | ||
515 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
516 | abort (); | |
517 | ||
518 | if (! desired_glyphs->enable[vpos]) | |
519 | { | |
520 | desired_glyphs->used[vpos] = 0; | |
521 | desired_glyphs->highlight[vpos] = 0; | |
522 | desired_glyphs->enable[vpos] = 1; | |
523 | } | |
524 | ||
525 | if (hpos > desired_glyphs->used[vpos]) | |
526 | { | |
527 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
528 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
529 | ||
530 | desired_glyphs->used[vpos] = hpos; | |
531 | while (g != end) | |
532 | *g++ = SPACEGLYPH; | |
533 | } | |
534 | } | |
535 | ||
536 | /* Like bcopy except never gets confused by overlap. */ | |
537 | ||
538 | void | |
539 | safe_bcopy (from, to, size) | |
540 | char *from, *to; | |
541 | int size; | |
542 | { | |
b5c685f4 | 543 | if (size <= 0 || from == to) |
4588ec20 JB |
544 | return; |
545 | ||
b5c685f4 JB |
546 | /* If the source and destination don't overlap, then bcopy can |
547 | handle it. If they do overlap, but the destination is lower in | |
548 | memory than the source, we'll assume bcopy can handle that. */ | |
549 | if (to < from || from + size <= to) | |
550 | bcopy (from, to, size); | |
551 | ||
552 | /* Otherwise, we'll copy from the end. */ | |
553 | else | |
4588ec20 | 554 | { |
b5c685f4 JB |
555 | register char *endf = from + size; |
556 | register char *endt = to + size; | |
4588ec20 JB |
557 | |
558 | /* If TO - FROM is large, then we should break the copy into | |
559 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
560 | TO - FROM is small, then the bcopy function call overhead | |
561 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
562 | anywhere. Since I don't think the obvious copy loop is too |
563 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
564 | if (to - from < 64) |
565 | { | |
566 | do | |
567 | *--endt = *--endf; | |
568 | while (endf != from); | |
569 | } | |
570 | else | |
571 | { | |
b5c685f4 | 572 | for (;;) |
4588ec20 JB |
573 | { |
574 | endt -= (to - from); | |
575 | endf -= (to - from); | |
576 | ||
b5c685f4 JB |
577 | if (endt < to) |
578 | break; | |
579 | ||
4588ec20 JB |
580 | bcopy (endf, endt, to - from); |
581 | } | |
b5c685f4 JB |
582 | |
583 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
584 | little left over. The amount left over is |
585 | (endt + (to - from)) - to, which is endt - from. */ | |
586 | bcopy (from, to, endt - from); | |
587 | } | |
588 | } | |
4588ec20 JB |
589 | } |
590 | ||
98038dc0 | 591 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
592 | DISTANCE may be negative. */ |
593 | ||
594 | static void | |
595 | rotate_vector (vector, size, distance) | |
596 | char *vector; | |
597 | int size; | |
598 | int distance; | |
599 | { | |
600 | char *temp = (char *) alloca (size); | |
601 | ||
602 | if (distance < 0) | |
603 | distance += size; | |
604 | ||
605 | bcopy (vector, temp + distance, size - distance); | |
606 | bcopy (vector + size - distance, temp, distance); | |
607 | bcopy (temp, vector, size); | |
608 | } | |
609 | ||
610 | /* Scroll lines from vpos FROM up to but not including vpos END | |
611 | down by AMOUNT lines (AMOUNT may be negative). | |
612 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
613 | ||
614 | int | |
d52bad65 | 615 | scroll_frame_lines (frame, from, end, amount, newpos) |
502b9b64 | 616 | register FRAME_PTR frame; |
d52bad65 | 617 | int from, end, amount, newpos; |
4588ec20 JB |
618 | { |
619 | register int i; | |
502b9b64 JB |
620 | register struct frame_glyphs *current_frame |
621 | = FRAME_CURRENT_GLYPHS (frame); | |
d52bad65 | 622 | int pos_adjust; |
23b0200c | 623 | int width = FRAME_WIDTH (frame); |
4588ec20 JB |
624 | |
625 | if (!line_ins_del_ok) | |
626 | return 0; | |
627 | ||
628 | if (amount == 0) | |
629 | return 1; | |
630 | ||
631 | if (amount > 0) | |
632 | { | |
502b9b64 | 633 | update_begin (frame); |
4588ec20 JB |
634 | set_terminal_window (end + amount); |
635 | if (!scroll_region_ok) | |
636 | ins_del_lines (end, -amount); | |
637 | ins_del_lines (from, amount); | |
638 | set_terminal_window (0); | |
639 | ||
502b9b64 | 640 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
641 | sizeof (GLYPH *) * (end + amount - from), |
642 | amount * sizeof (GLYPH *)); | |
643 | ||
60a8948a | 644 | rotate_vector (current_frame->charstarts + from, |
d52bad65 RS |
645 | sizeof (int *) * (end + amount - from), |
646 | amount * sizeof (int *)); | |
647 | ||
23b0200c RS |
648 | safe_bcopy (current_frame->used + from, |
649 | current_frame->used + from + amount, | |
650 | (end - from) * sizeof current_frame->used[0]); | |
651 | ||
652 | safe_bcopy (current_frame->highlight + from, | |
653 | current_frame->highlight + from + amount, | |
654 | (end - from) * sizeof current_frame->highlight[0]); | |
655 | ||
656 | safe_bcopy (current_frame->enable + from, | |
657 | current_frame->enable + from + amount, | |
658 | (end - from) * sizeof current_frame->enable[0]); | |
659 | ||
d52bad65 RS |
660 | /* Adjust the lines by an amount |
661 | that puts the first of them at NEWPOS. */ | |
23b0200c | 662 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
663 | |
664 | /* Offset each char position in the charstarts lines we moved | |
665 | by pos_adjust. */ | |
23b0200c | 666 | for (i = from + amount; i < end + amount; i++) |
60a8948a | 667 | { |
d52bad65 | 668 | int *line = current_frame->charstarts[i]; |
60a8948a | 669 | int col; |
23b0200c RS |
670 | for (col = 0; col < width; col++) |
671 | if (line[col] > 0) | |
672 | line[col] += pos_adjust; | |
60a8948a | 673 | } |
23b0200c | 674 | for (i = from; i < from + amount; i++) |
60a8948a | 675 | { |
d52bad65 | 676 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
677 | int col; |
678 | line[0] = -1; | |
23b0200c | 679 | for (col = 0; col < width; col++) |
60a8948a RS |
680 | line[col] = 0; |
681 | } | |
682 | ||
4588ec20 JB |
683 | /* Mark the lines made empty by scrolling as enabled, empty and |
684 | normal video. */ | |
502b9b64 JB |
685 | bzero (current_frame->used + from, |
686 | amount * sizeof current_frame->used[0]); | |
687 | bzero (current_frame->highlight + from, | |
688 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
689 | for (i = from; i < from + amount; i++) |
690 | { | |
502b9b64 | 691 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 692 | current_frame->charstarts[i][0] = -1; |
502b9b64 | 693 | current_frame->enable[i] = 1; |
4588ec20 JB |
694 | } |
695 | ||
502b9b64 JB |
696 | safe_bcopy (current_frame->bufp + from, |
697 | current_frame->bufp + from + amount, | |
698 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
699 | |
700 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 701 | if (FRAME_X_P (frame)) |
4588ec20 | 702 | { |
502b9b64 JB |
703 | safe_bcopy (current_frame->top_left_x + from, |
704 | current_frame->top_left_x + from + amount, | |
705 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 706 | |
502b9b64 JB |
707 | safe_bcopy (current_frame->top_left_y + from, |
708 | current_frame->top_left_y + from + amount, | |
709 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 710 | |
502b9b64 JB |
711 | safe_bcopy (current_frame->pix_width + from, |
712 | current_frame->pix_width + from + amount, | |
713 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 714 | |
502b9b64 JB |
715 | safe_bcopy (current_frame->pix_height + from, |
716 | current_frame->pix_height + from + amount, | |
717 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
718 | |
719 | safe_bcopy (current_frame->max_ascent + from, | |
720 | current_frame->max_ascent + from + amount, | |
721 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
722 | } |
723 | #endif /* HAVE_X_WINDOWS */ | |
724 | ||
502b9b64 | 725 | update_end (frame); |
4588ec20 JB |
726 | } |
727 | if (amount < 0) | |
728 | { | |
502b9b64 | 729 | update_begin (frame); |
4588ec20 JB |
730 | set_terminal_window (end); |
731 | ins_del_lines (from + amount, amount); | |
732 | if (!scroll_region_ok) | |
733 | ins_del_lines (end + amount, -amount); | |
734 | set_terminal_window (0); | |
735 | ||
502b9b64 | 736 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
737 | sizeof (GLYPH *) * (end - from - amount), |
738 | amount * sizeof (GLYPH *)); | |
739 | ||
60a8948a | 740 | rotate_vector (current_frame->charstarts + from + amount, |
d52bad65 RS |
741 | sizeof (int *) * (end - from - amount), |
742 | amount * sizeof (int *)); | |
743 | ||
23b0200c RS |
744 | safe_bcopy (current_frame->used + from, |
745 | current_frame->used + from + amount, | |
746 | (end - from) * sizeof current_frame->used[0]); | |
747 | ||
748 | safe_bcopy (current_frame->highlight + from, | |
749 | current_frame->highlight + from + amount, | |
750 | (end - from) * sizeof current_frame->highlight[0]); | |
751 | ||
752 | safe_bcopy (current_frame->enable + from, | |
753 | current_frame->enable + from + amount, | |
754 | (end - from) * sizeof current_frame->enable[0]); | |
755 | ||
d52bad65 RS |
756 | /* Adjust the lines by an amount |
757 | that puts the first of them at NEWPOS. */ | |
23b0200c | 758 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
759 | |
760 | /* Offset each char position in the charstarts lines we moved | |
761 | by pos_adjust. */ | |
762 | for (i = from + amount; i < end + amount; i++) | |
763 | { | |
d52bad65 | 764 | int *line = current_frame->charstarts[i]; |
60a8948a | 765 | int col; |
23b0200c RS |
766 | for (col = 0; col < width; col++) |
767 | if (line[col] > 0) | |
768 | line[col] += pos_adjust; | |
60a8948a | 769 | } |
23b0200c | 770 | for (i = end + amount; i < end; i++) |
60a8948a | 771 | { |
d52bad65 | 772 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
773 | int col; |
774 | line[0] = -1; | |
23b0200c | 775 | for (col = 0; col < width; col++) |
60a8948a RS |
776 | line[col] = 0; |
777 | } | |
778 | ||
4588ec20 JB |
779 | /* Mark the lines made empty by scrolling as enabled, empty and |
780 | normal video. */ | |
502b9b64 JB |
781 | bzero (current_frame->used + end + amount, |
782 | - amount * sizeof current_frame->used[0]); | |
783 | bzero (current_frame->highlight + end + amount, | |
784 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
785 | for (i = end + amount; i < end; i++) |
786 | { | |
502b9b64 | 787 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 788 | current_frame->charstarts[i][0] = 0; |
502b9b64 | 789 | current_frame->enable[i] = 1; |
4588ec20 JB |
790 | } |
791 | ||
502b9b64 JB |
792 | safe_bcopy (current_frame->bufp + from, |
793 | current_frame->bufp + from + amount, | |
794 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
795 | |
796 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 797 | if (FRAME_X_P (frame)) |
4588ec20 | 798 | { |
502b9b64 JB |
799 | safe_bcopy (current_frame->top_left_x + from, |
800 | current_frame->top_left_x + from + amount, | |
801 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 802 | |
502b9b64 JB |
803 | safe_bcopy (current_frame->top_left_y + from, |
804 | current_frame->top_left_y + from + amount, | |
805 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 806 | |
502b9b64 JB |
807 | safe_bcopy (current_frame->pix_width + from, |
808 | current_frame->pix_width + from + amount, | |
809 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 810 | |
502b9b64 JB |
811 | safe_bcopy (current_frame->pix_height + from, |
812 | current_frame->pix_height + from + amount, | |
813 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
814 | |
815 | safe_bcopy (current_frame->max_ascent + from, | |
816 | current_frame->max_ascent + from + amount, | |
817 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
818 | } |
819 | #endif /* HAVE_X_WINDOWS */ | |
820 | ||
502b9b64 | 821 | update_end (frame); |
4588ec20 JB |
822 | } |
823 | return 1; | |
824 | } | |
825 | \f | |
502b9b64 | 826 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 827 | copy all the columns that W does not occupy |
502b9b64 JB |
828 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
829 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
830 | |
831 | preserve_other_columns (w) | |
832 | struct window *w; | |
833 | { | |
834 | register int vpos; | |
502b9b64 JB |
835 | register struct frame_glyphs *current_frame, *desired_frame; |
836 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
837 | int start = XFASTINT (w->left); |
838 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
839 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
840 | ||
502b9b64 JB |
841 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
842 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
843 | |
844 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
845 | { | |
502b9b64 | 846 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
847 | { |
848 | if (start > 0) | |
849 | { | |
850 | int len; | |
851 | ||
502b9b64 | 852 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 JB |
853 | desired_frame->glyphs[vpos], |
854 | start * sizeof (current_frame->glyphs[vpos])); | |
60a8948a RS |
855 | bcopy (current_frame->charstarts[vpos], |
856 | desired_frame->charstarts[vpos], | |
857 | start * sizeof (current_frame->charstarts[vpos])); | |
502b9b64 JB |
858 | len = min (start, current_frame->used[vpos]); |
859 | if (desired_frame->used[vpos] < len) | |
860 | desired_frame->used[vpos] = len; | |
4588ec20 | 861 | } |
502b9b64 JB |
862 | if (current_frame->used[vpos] > end |
863 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 864 | { |
502b9b64 | 865 | while (desired_frame->used[vpos] < end) |
60a8948a RS |
866 | { |
867 | int used = desired_frame->used[vpos]++; | |
868 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; | |
869 | desired_frame->glyphs[vpos][used] = 0; | |
870 | } | |
502b9b64 JB |
871 | bcopy (current_frame->glyphs[vpos] + end, |
872 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 JB |
873 | ((current_frame->used[vpos] - end) |
874 | * sizeof (current_frame->glyphs[vpos]))); | |
60a8948a RS |
875 | bcopy (current_frame->charstarts[vpos] + end, |
876 | desired_frame->charstarts[vpos] + end, | |
877 | ((current_frame->used[vpos] - end) | |
878 | * sizeof (current_frame->charstarts[vpos]))); | |
502b9b64 | 879 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
880 | } |
881 | } | |
882 | } | |
883 | } | |
884 | \f | |
885 | #if 0 | |
886 | ||
502b9b64 | 887 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 888 | copy all the columns that w does occupy |
502b9b64 JB |
889 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
890 | so that update_frame will not change those columns. | |
4588ec20 JB |
891 | |
892 | Have not been able to figure out how to use this correctly. */ | |
893 | ||
894 | preserve_my_columns (w) | |
895 | struct window *w; | |
896 | { | |
897 | register int vpos, fin; | |
502b9b64 JB |
898 | register struct frame_glyphs *l1, *l2; |
899 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
900 | int start = XFASTINT (w->left); |
901 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
902 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
903 | ||
904 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
905 | { | |
502b9b64 JB |
906 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
907 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
908 | { |
909 | if (l2->length > start && l1->length < l2->length) | |
910 | { | |
911 | fin = l2->length; | |
912 | if (fin > end) fin = end; | |
913 | while (l1->length < start) | |
914 | l1->body[l1->length++] = ' '; | |
915 | bcopy (l2->body + start, l1->body + start, fin - start); | |
916 | l1->length = fin; | |
917 | } | |
918 | } | |
919 | } | |
920 | } | |
921 | ||
922 | #endif | |
923 | \f | |
b64b3980 | 924 | /* Adjust by ADJUST the charstart values in window W |
23b0200c | 925 | after vpos VPOS, which counts relative to the frame |
b64b3980 RS |
926 | (not relative to W itself). */ |
927 | ||
928 | void | |
929 | adjust_window_charstarts (w, vpos, adjust) | |
930 | struct window *w; | |
931 | int vpos; | |
932 | int adjust; | |
933 | { | |
934 | int left = XFASTINT (w->left); | |
935 | int top = XFASTINT (w->top); | |
23b0200c RS |
936 | int right = left + window_internal_width (w); |
937 | int bottom = top + window_internal_height (w); | |
b64b3980 RS |
938 | int i; |
939 | ||
23b0200c | 940 | for (i = vpos + 1; i < bottom; i++) |
b64b3980 RS |
941 | { |
942 | int *charstart | |
943 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; | |
944 | int j; | |
945 | for (j = left; j < right; j++) | |
946 | if (charstart[j] > 0) | |
947 | charstart[j] += adjust; | |
948 | } | |
949 | } | |
23b0200c | 950 | |
352f1545 RS |
951 | /* Check the charstarts values in the area of window W |
952 | for internal consistency. We cannot check that they are "right"; | |
953 | we can only look for something nonsensical. */ | |
954 | ||
23b0200c RS |
955 | verify_charstarts (w) |
956 | struct window *w; | |
957 | { | |
958 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
959 | int i; | |
960 | int top = XFASTINT (w->top); | |
961 | int bottom = top + window_internal_height (w); | |
962 | int left = XFASTINT (w->left); | |
963 | int right = left + window_internal_width (w); | |
964 | int next_line; | |
352f1545 RS |
965 | int truncate = (XINT (w->hscroll) |
966 | || (truncate_partial_width_windows | |
967 | && (XFASTINT (w->width) < FRAME_WIDTH (f))) | |
968 | || !NILP (XBUFFER (w->buffer)->truncate_lines)); | |
23b0200c RS |
969 | |
970 | for (i = top; i < bottom; i++) | |
971 | { | |
972 | int j; | |
973 | int last; | |
352f1545 | 974 | int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; |
23b0200c RS |
975 | |
976 | if (i != top) | |
352f1545 RS |
977 | { |
978 | if (truncate) | |
979 | { | |
980 | /* If we are truncating lines, allow a jump | |
981 | in charstarts from one line to the next. */ | |
982 | if (charstart[left] < next_line) | |
983 | abort (); | |
984 | } | |
985 | else | |
986 | { | |
987 | if (charstart[left] != next_line) | |
988 | abort (); | |
989 | } | |
990 | } | |
23b0200c RS |
991 | |
992 | for (j = left; j < right; j++) | |
993 | if (charstart[j] > 0) | |
994 | last = charstart[j]; | |
2e8907d3 RS |
995 | /* Record where the next line should start. */ |
996 | next_line = last; | |
997 | if (BUF_ZV (XBUFFER (w->buffer)) != last) | |
998 | { | |
999 | /* If there's a newline between the two lines, count that. */ | |
1000 | int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); | |
1001 | if (endchar == '\n') | |
1002 | next_line++; | |
1003 | } | |
23b0200c RS |
1004 | } |
1005 | } | |
b64b3980 | 1006 | \f |
4588ec20 JB |
1007 | /* On discovering that the redisplay for a window was no good, |
1008 | cancel the columns of that window, so that when the window is | |
1009 | displayed over again get_display_line will not complain. */ | |
1010 | ||
1011 | cancel_my_columns (w) | |
1012 | struct window *w; | |
1013 | { | |
1014 | register int vpos; | |
60a8948a RS |
1015 | register struct frame_glyphs *desired_glyphs |
1016 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
1017 | register int start = XFASTINT (w->left); |
1018 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
1019 | ||
1020 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
1021 | if (desired_glyphs->enable[vpos] | |
1022 | && desired_glyphs->used[vpos] >= start) | |
1023 | desired_glyphs->used[vpos] = start; | |
1024 | } | |
1025 | \f | |
502b9b64 | 1026 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
1027 | the necessary output for one change in the buffer. |
1028 | They may return 0 meaning nothing was done if anything is difficult, | |
1029 | or 1 meaning the output was performed properly. | |
502b9b64 | 1030 | They assume that the frame was up to date before the buffer |
94aa5d2d | 1031 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
1032 | see command_loop_1 where these are called. */ |
1033 | ||
1034 | int | |
1035 | direct_output_for_insert (g) | |
1036 | int g; | |
1037 | { | |
502b9b64 JB |
1038 | register FRAME_PTR frame = selected_frame; |
1039 | register struct frame_glyphs *current_frame | |
1040 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
1041 | |
1042 | #ifndef COMPILER_REGISTER_BUG | |
1043 | register | |
1044 | #endif /* COMPILER_REGISTER_BUG */ | |
1045 | struct window *w = XWINDOW (selected_window); | |
1046 | #ifndef COMPILER_REGISTER_BUG | |
1047 | register | |
1048 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1049 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
1050 | #ifndef COMPILER_REGISTER_BUG |
1051 | register | |
1052 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1053 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 1054 | |
fa61c701 JB |
1055 | /* Give up if about to continue line. */ |
1056 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
1057 | ||
4588ec20 JB |
1058 | /* Avoid losing if cursor is in invisible text off left margin */ |
1059 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
1060 | ||
1061 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 1062 | || cursor_in_echo_area |
502b9b64 JB |
1063 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
1064 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 1065 | |
502b9b64 | 1066 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
1067 | || !display_completed |
1068 | ||
1069 | /* Give up if buffer appears in two places. */ | |
1070 | || buffer_shared > 1 | |
1071 | ||
d169fe39 RS |
1072 | #ifdef USE_TEXT_PROPERTIES |
1073 | /* Intervals have already been adjusted, point is after the | |
1074 | character that was just inserted. */ | |
ef4d2f9e | 1075 | /* Give up if character is invisible. */ |
d169fe39 RS |
1076 | /* Give up if character has a face property. |
1077 | At the moment we only lose at end of line or end of buffer | |
1078 | and only with faces that have some background */ | |
1079 | /* Instead of wasting time, give up if character has any text properties */ | |
1080 | || ! NILP (Ftext_properties_at (XFASTINT (point - 1), Qnil)) | |
1081 | #endif | |
1082 | ||
4588ec20 JB |
1083 | /* Give up if w is minibuffer and a message is being displayed there */ |
1084 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
1085 | return 0; | |
1086 | ||
517b2e01 JB |
1087 | { |
1088 | #ifdef HAVE_X_WINDOWS | |
1089 | int dummy; | |
90b5299a | 1090 | int face = compute_char_face (frame, w, point - 1, -1, -1, &dummy, point); |
517b2e01 | 1091 | #endif |
a1c3de84 | 1092 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
839c7dfb RS |
1093 | current_frame->charstarts[vpos][hpos] = point - 1; |
1094 | /* Record the entry for after the newly inserted character. */ | |
1095 | current_frame->charstarts[vpos][hpos + 1] = point; | |
b64b3980 | 1096 | adjust_window_charstarts (w, vpos, 1); |
517b2e01 | 1097 | } |
4588ec20 JB |
1098 | unchanged_modified = MODIFF; |
1099 | beg_unchanged = GPT - BEG; | |
1100 | XFASTINT (w->last_point) = point; | |
1101 | XFASTINT (w->last_point_x) = hpos; | |
1102 | XFASTINT (w->last_modified) = MODIFF; | |
1103 | ||
1104 | reassert_line_highlight (0, vpos); | |
502b9b64 | 1105 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 1106 | fflush (stdout); |
502b9b64 JB |
1107 | ++FRAME_CURSOR_X (frame); |
1108 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 1109 | { |
502b9b64 JB |
1110 | current_frame->used[vpos] = hpos + 1; |
1111 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
1112 | } |
1113 | ||
1114 | return 1; | |
1115 | } | |
1116 | ||
1117 | int | |
1118 | direct_output_forward_char (n) | |
1119 | int n; | |
1120 | { | |
502b9b64 | 1121 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 1122 | register struct window *w = XWINDOW (selected_window); |
d169fe39 | 1123 | int position; |
ea0d86af RS |
1124 | int hpos = FRAME_CURSOR_X (frame); |
1125 | ||
1126 | /* Give up if in truncated text at end of line. */ | |
1127 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1) | |
1128 | return 0; | |
1129 | ||
a9764248 JB |
1130 | /* Avoid losing if cursor is in invisible text off left margin |
1131 | or about to go off either side of window. */ | |
502b9b64 | 1132 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
1133 | && (XINT (w->hscroll) || n < 0)) |
1134 | || (n > 0 | |
fa61c701 | 1135 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 1136 | || cursor_in_echo_area) |
4588ec20 | 1137 | return 0; |
d169fe39 | 1138 | |
de83c314 RS |
1139 | /* Can't use direct output if highlighting a region. */ |
1140 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1141 | return 0; | |
1142 | ||
d169fe39 RS |
1143 | #ifdef USE_TEXT_PROPERTIES |
1144 | /* Don't use direct output next to an invisible character | |
1145 | since we might need to do something special. */ | |
1146 | ||
2f24f5ac RS |
1147 | XFASTINT (position) = point; |
1148 | if (XFASTINT (position) < ZV | |
294634fb | 1149 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1150 | Qinvisible, |
294634fb KH |
1151 | selected_window))) |
1152 | return 0; | |
d169fe39 | 1153 | |
2f24f5ac RS |
1154 | XFASTINT (position) = point - 1; |
1155 | if (XFASTINT (position) >= BEGV | |
294634fb | 1156 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1157 | Qinvisible, |
294634fb KH |
1158 | selected_window))) |
1159 | return 0; | |
d169fe39 RS |
1160 | #endif |
1161 | ||
502b9b64 JB |
1162 | FRAME_CURSOR_X (frame) += n; |
1163 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); | |
4588ec20 | 1164 | XFASTINT (w->last_point) = point; |
502b9b64 | 1165 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 1166 | fflush (stdout); |
d169fe39 | 1167 | |
4588ec20 JB |
1168 | return 1; |
1169 | } | |
1170 | \f | |
1171 | static void update_line (); | |
1172 | ||
502b9b64 | 1173 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
1174 | Value is nonzero if redisplay stopped due to pending input. |
1175 | FORCE nonzero means do not stop for pending input. */ | |
1176 | ||
1177 | int | |
502b9b64 JB |
1178 | update_frame (f, force, inhibit_hairy_id) |
1179 | FRAME_PTR f; | |
4588ec20 JB |
1180 | int force; |
1181 | int inhibit_hairy_id; | |
1182 | { | |
54633da0 | 1183 | register struct frame_glyphs *current_frame; |
7098a0fa | 1184 | register struct frame_glyphs *desired_frame = 0; |
4588ec20 JB |
1185 | register int i; |
1186 | int pause; | |
1187 | int preempt_count = baud_rate / 2400 + 1; | |
1188 | extern input_pending; | |
1189 | #ifdef HAVE_X_WINDOWS | |
1190 | register int downto, leftmost; | |
1191 | #endif | |
1192 | ||
d88c2b9e RS |
1193 | if (preempt_count <= 0) |
1194 | preempt_count = 1; | |
1195 | ||
502b9b64 | 1196 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1197 | |
1198 | detect_input_pending (); | |
1199 | if (input_pending && !force) | |
1200 | { | |
1201 | pause = 1; | |
1202 | goto do_pause; | |
1203 | } | |
1204 | ||
502b9b64 | 1205 | update_begin (f); |
4588ec20 JB |
1206 | |
1207 | if (!line_ins_del_ok) | |
1208 | inhibit_hairy_id = 1; | |
1209 | ||
7098a0fa RS |
1210 | /* These are separate to avoid a possible bug in the AIX C compiler. */ |
1211 | current_frame = FRAME_CURRENT_GLYPHS (f); | |
1212 | desired_frame = FRAME_DESIRED_GLYPHS (f); | |
1213 | ||
efb859b4 JB |
1214 | /* See if any of the desired lines are enabled; don't compute for |
1215 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1216 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1217 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1218 | break; |
1219 | ||
1220 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1221 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1222 | force |= scrolling (f); | |
4588ec20 JB |
1223 | |
1224 | /* Update the individual lines as needed. Do bottom line first. */ | |
1225 | ||
502b9b64 JB |
1226 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1227 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
1228 | |
1229 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1230 | if (FRAME_X_P (f)) |
4588ec20 | 1231 | { |
502b9b64 JB |
1232 | leftmost = downto = f->display.x->internal_border_width; |
1233 | if (desired_frame->enable[0]) | |
4588ec20 | 1234 | { |
502b9b64 JB |
1235 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1236 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
1237 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 1238 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1239 | current_frame->top_left_x[0] = leftmost; |
1240 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1241 | } |
1242 | } | |
1243 | #endif /* HAVE_X_WINDOWS */ | |
1244 | ||
1245 | /* Now update the rest of the lines. */ | |
502b9b64 | 1246 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1247 | { |
502b9b64 | 1248 | if (desired_frame->enable[i]) |
4588ec20 | 1249 | { |
b6a65ac2 | 1250 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1251 | { |
1252 | /* Flush out every so many lines. | |
1253 | Also flush out if likely to have more than 1k buffered | |
1254 | otherwise. I'm told that some telnet connections get | |
1255 | really screwed by more than 1k output at once. */ | |
1256 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1257 | if (outq > 900 | |
1258 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1259 | { | |
1260 | fflush (stdout); | |
1261 | if (preempt_count == 1) | |
1262 | { | |
a41f8bed JB |
1263 | #ifdef EMACS_OUTQSIZE |
1264 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1265 | /* Probably not a tty. Ignore the error and reset |
1266 | * the outq count. */ | |
1267 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1268 | #endif | |
1269 | outq *= 10; | |
d520f0d2 | 1270 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 1271 | sleep (outq / baud_rate); |
4588ec20 JB |
1272 | } |
1273 | } | |
1274 | if ((i - 1) % preempt_count == 0) | |
1275 | detect_input_pending (); | |
1276 | } | |
1277 | ||
502b9b64 | 1278 | update_line (f, i); |
4588ec20 | 1279 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1280 | if (FRAME_X_P (f)) |
4588ec20 | 1281 | { |
502b9b64 JB |
1282 | current_frame->top_left_y[i] = downto; |
1283 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1284 | } |
1285 | #endif /* HAVE_X_WINDOWS */ | |
1286 | } | |
1287 | ||
e5d77022 | 1288 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1289 | if (FRAME_X_P (f)) |
448fd7c0 | 1290 | downto += current_frame->pix_height[i]; |
e5d77022 | 1291 | #endif |
4588ec20 | 1292 | } |
502b9b64 | 1293 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1294 | |
1295 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1296 | if (!pause) | |
1297 | { | |
648fa17d JB |
1298 | if (cursor_in_echo_area |
1299 | && FRAME_HAS_MINIBUF_P (f)) | |
1113d9db | 1300 | { |
648fa17d JB |
1301 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1302 | int row, col; | |
1303 | ||
1304 | if (cursor_in_echo_area < 0) | |
1305 | { | |
1306 | row = top; | |
1307 | col = 0; | |
1308 | } | |
1113d9db | 1309 | else |
648fa17d JB |
1310 | { |
1311 | /* If the minibuffer is several lines high, find the last | |
1312 | line that has any text on it. */ | |
1313 | row = FRAME_HEIGHT (f); | |
1314 | do | |
1315 | { | |
1316 | row--; | |
1317 | if (current_frame->enable[row]) | |
1318 | col = current_frame->used[row]; | |
1319 | else | |
1320 | col = 0; | |
1321 | } | |
1322 | while (row > top && col == 0); | |
1323 | ||
1324 | if (col >= FRAME_WIDTH (f)) | |
1325 | { | |
1326 | col = 0; | |
1327 | if (row < FRAME_HEIGHT (f) - 1) | |
1328 | row++; | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | cursor_to (row, col); | |
1113d9db | 1333 | } |
4588ec20 | 1334 | else |
502b9b64 JB |
1335 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1336 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1337 | } |
1338 | ||
502b9b64 | 1339 | update_end (f); |
4588ec20 JB |
1340 | |
1341 | if (termscript) | |
1342 | fflush (termscript); | |
1343 | fflush (stdout); | |
1344 | ||
1345 | /* Here if output is preempted because input is detected. */ | |
1346 | do_pause: | |
1347 | ||
502b9b64 | 1348 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1349 | display_completed = !pause; |
1350 | ||
f5843453 | 1351 | bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1352 | return pause; |
1353 | } | |
1354 | ||
1355 | /* Called when about to quit, to check for doing so | |
1356 | at an improper time. */ | |
1357 | ||
1358 | void | |
1359 | quit_error_check () | |
1360 | { | |
502b9b64 | 1361 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1362 | return; |
502b9b64 | 1363 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1364 | abort (); |
502b9b64 | 1365 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1366 | abort (); |
1367 | } | |
1368 | \f | |
1369 | /* Decide what insert/delete line to do, and do it */ | |
1370 | ||
1371 | extern void scrolling_1 (); | |
1372 | ||
502b9b64 JB |
1373 | scrolling (frame) |
1374 | FRAME_PTR frame; | |
4588ec20 JB |
1375 | { |
1376 | int unchanged_at_top, unchanged_at_bottom; | |
1377 | int window_size; | |
1378 | int changed_lines; | |
502b9b64 JB |
1379 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1380 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1381 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
4588ec20 | 1382 | register int i; |
502b9b64 JB |
1383 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1384 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1385 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1386 | |
1387 | /* Compute hash codes of all the lines. | |
1388 | Also calculate number of changed lines, | |
1389 | number of unchanged lines at the beginning, | |
1390 | and number of unchanged lines at the end. */ | |
1391 | ||
1392 | changed_lines = 0; | |
1393 | unchanged_at_top = 0; | |
502b9b64 JB |
1394 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1395 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1396 | { |
1397 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1398 | if (!current_frame->enable[i]) |
4588ec20 | 1399 | return 0; |
502b9b64 JB |
1400 | old_hash[i] = line_hash_code (current_frame, i); |
1401 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1402 | new_hash[i] = old_hash[i]; |
1403 | else | |
502b9b64 | 1404 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1405 | |
1406 | if (old_hash[i] != new_hash[i]) | |
1407 | { | |
1408 | changed_lines++; | |
502b9b64 | 1409 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1410 | } |
1411 | else if (i == unchanged_at_top) | |
1412 | unchanged_at_top++; | |
502b9b64 | 1413 | draw_cost[i] = line_draw_cost (desired_frame, i); |
4588ec20 JB |
1414 | } |
1415 | ||
1416 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1417 | if (changed_lines < baud_rate / 2400 | |
502b9b64 | 1418 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1419 | return 1; |
1420 | ||
502b9b64 | 1421 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1422 | - unchanged_at_bottom); |
1423 | ||
1424 | if (scroll_region_ok) | |
1425 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1426 | else if (memory_below_frame) |
4588ec20 JB |
1427 | free_at_end_vpos = -1; |
1428 | ||
1429 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1430 | current frame and desired frame, don't bother with i/d calc. */ |
4588ec20 JB |
1431 | if (window_size >= 18 && baud_rate > 2400 |
1432 | && (window_size >= | |
1433 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1434 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1435 | old_hash, new_hash, draw_cost))) |
1436 | return 0; | |
1437 | ||
502b9b64 | 1438 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 JB |
1439 | draw_cost + unchanged_at_top - 1, |
1440 | old_hash + unchanged_at_top - 1, | |
1441 | new_hash + unchanged_at_top - 1, | |
1442 | free_at_end_vpos - unchanged_at_top); | |
1443 | ||
1444 | return 0; | |
1445 | } | |
1446 | \f | |
1447 | /* Return the offset in its buffer of the character at location col, line | |
1448 | in the given window. */ | |
1449 | int | |
1450 | buffer_posn_from_coords (window, col, line) | |
1451 | struct window *window; | |
1452 | int col, line; | |
1453 | { | |
ef0fdbb1 | 1454 | int hscroll = XINT (window->hscroll); |
4588ec20 JB |
1455 | int window_left = XFASTINT (window->left); |
1456 | ||
1457 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1458 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1459 | window. */ | |
fa61c701 | 1460 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1461 | |
efb859b4 | 1462 | int startp = marker_position (window->start); |
4588ec20 JB |
1463 | |
1464 | /* Since compute_motion will only operate on the current buffer, | |
1465 | we need to save the old one and restore it when we're done. */ | |
1466 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1467 | struct position *posn; |
4588ec20 JB |
1468 | |
1469 | current_buffer = XBUFFER (window->buffer); | |
1470 | ||
502b9b64 JB |
1471 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1472 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1473 | the window, but it isn't maintained correctly, and I'm not even |
1474 | sure I will keep it. */ | |
1475 | posn = compute_motion (startp, 0, | |
1476 | (window == XWINDOW (minibuf_window) && startp == 1 | |
ef0fdbb1 KH |
1477 | ? minibuf_prompt_width : 0) |
1478 | + (hscroll ? 1 - hscroll : 0), | |
fb0f454a | 1479 | ZV, line, col, |
e37f06d7 | 1480 | window_width, hscroll, 0, window); |
4588ec20 JB |
1481 | |
1482 | current_buffer = old_current_buffer; | |
1483 | ||
502b9b64 | 1484 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1485 | to be *after* the newline, i.e. at the start of the next line. |
1486 | This is reasonable, but not really what we want. So if the | |
1487 | result is on a line below LINE, back it up one character. */ | |
1488 | if (posn->vpos > line) | |
1489 | return posn->bufpos - 1; | |
1490 | else | |
1491 | return posn->bufpos; | |
4588ec20 JB |
1492 | } |
1493 | \f | |
1494 | static int | |
1495 | count_blanks (r) | |
1496 | register GLYPH *r; | |
1497 | { | |
1498 | register GLYPH *p = r; | |
94aa5d2d RS |
1499 | while (*p++ == SPACEGLYPH); |
1500 | return p - r - 1; | |
4588ec20 JB |
1501 | } |
1502 | ||
1503 | static int | |
1504 | count_match (str1, str2) | |
1505 | GLYPH *str1, *str2; | |
1506 | { | |
1507 | register GLYPH *p1 = str1; | |
1508 | register GLYPH *p2 = str2; | |
1509 | while (*p1++ == *p2++); | |
1510 | return p1 - str1 - 1; | |
1511 | } | |
1512 | ||
1513 | /* Char insertion/deletion cost vector, from term.c */ | |
1514 | extern int *char_ins_del_vector; | |
1515 | ||
945807a3 | 1516 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1517 | |
1518 | static void | |
502b9b64 JB |
1519 | update_line (frame, vpos) |
1520 | register FRAME_PTR frame; | |
4588ec20 JB |
1521 | int vpos; |
1522 | { | |
1523 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
60a8948a | 1524 | int *temp1; |
4588ec20 JB |
1525 | int tem; |
1526 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1527 | int save; | |
502b9b64 JB |
1528 | register struct frame_glyphs *current_frame |
1529 | = FRAME_CURRENT_GLYPHS (frame); | |
1530 | register struct frame_glyphs *desired_frame | |
1531 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1532 | |
502b9b64 JB |
1533 | if (desired_frame->highlight[vpos] |
1534 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1535 | { |
502b9b64 JB |
1536 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1537 | (current_frame->enable[vpos] ? | |
1538 | current_frame->used[vpos] : 0)); | |
1539 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1540 | } |
1541 | else | |
502b9b64 | 1542 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1543 | |
502b9b64 | 1544 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1545 | { |
1546 | olen = 0; | |
1547 | } | |
1548 | else | |
1549 | { | |
502b9b64 JB |
1550 | obody = current_frame->glyphs[vpos]; |
1551 | olen = current_frame->used[vpos]; | |
1552 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1553 | { |
1554 | if (!must_write_spaces) | |
1555 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1556 | olen--; | |
1557 | } | |
1558 | else | |
1559 | { | |
1560 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1561 | spaces all the way to the frame edge |
4588ec20 JB |
1562 | so that the reverse video extends all the way across. */ |
1563 | ||
502b9b64 | 1564 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1565 | obody[olen++] = SPACEGLYPH; |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1570 | current_frame->enable[vpos] = 1; |
1571 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1572 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1573 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1574 | |
1575 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1576 | if (FRAME_X_P (frame)) |
4588ec20 | 1577 | { |
502b9b64 JB |
1578 | current_frame->pix_width[vpos] |
1579 | = current_frame->used[vpos] | |
1580 | * FONT_WIDTH (frame->display.x->font); | |
1581 | current_frame->pix_height[vpos] | |
39d1fe00 | 1582 | = frame->display.x->line_height; |
4588ec20 JB |
1583 | } |
1584 | #endif /* HAVE_X_WINDOWS */ | |
1585 | ||
502b9b64 | 1586 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1587 | { |
1588 | nlen = 0; | |
1589 | goto just_erase; | |
1590 | } | |
1591 | ||
502b9b64 JB |
1592 | nbody = desired_frame->glyphs[vpos]; |
1593 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1594 | |
1595 | /* Pretend trailing spaces are not there at all, | |
1596 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1597 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1598 | { |
1599 | if (!must_write_spaces) | |
1600 | /* We know that the previous character byte contains 0. */ | |
1601 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1602 | nlen--; | |
1603 | } | |
1604 | else | |
1605 | { | |
1606 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1607 | all the way to the frame edge |
4588ec20 JB |
1608 | so that the reverse video extends all the way across. */ |
1609 | ||
502b9b64 | 1610 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1611 | nbody[nlen++] = SPACEGLYPH; |
1612 | } | |
1613 | ||
1614 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1615 | if (!char_ins_del_ok) | |
1616 | { | |
1617 | int i,j; | |
1618 | ||
76426794 RS |
1619 | #if 0 |
1620 | if (FRAME_X_P (frame)) | |
1621 | { | |
1622 | /* Under X, erase everything we are going to rewrite, | |
1623 | and rewrite everything from the first char that's changed. | |
1624 | This is part of supporting fonts like Courier | |
1625 | whose chars can overlap outside the char width. */ | |
1626 | for (i = 0; i < nlen; i++) | |
1627 | if (i >= olen || nbody[i] != obody[i]) | |
1628 | break; | |
1629 | ||
1630 | cursor_to (vpos, i); | |
1631 | if (i != olen) | |
1632 | clear_end_of_line (olen); | |
1633 | write_glyphs (nbody + i, nlen - i); | |
1634 | } | |
1635 | else | |
1636 | {} | |
1637 | #endif /* 0 */ | |
4588ec20 JB |
1638 | for (i = 0; i < nlen; i++) |
1639 | { | |
1640 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1641 | { | |
1642 | cursor_to (vpos, i); | |
1643 | for (j = 1; (i + j < nlen && | |
1644 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1645 | j++); | |
1646 | ||
1647 | /* Output this run of non-matching chars. */ | |
1648 | write_glyphs (nbody + i, j); | |
1649 | i += j - 1; | |
1650 | ||
1651 | /* Now find the next non-match. */ | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1656 | if (olen > nlen) | |
1657 | { | |
1658 | cursor_to (vpos, nlen); | |
1659 | clear_end_of_line (olen); | |
1660 | } | |
1661 | ||
502b9b64 JB |
1662 | /* Exchange contents between current_frame and new_frame. */ |
1663 | temp = desired_frame->glyphs[vpos]; | |
1664 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1665 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1666 | |
60a8948a RS |
1667 | /* Exchange charstarts between current_frame and new_frame. */ |
1668 | temp1 = desired_frame->charstarts[vpos]; | |
1669 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1670 | current_frame->charstarts[vpos] = temp1; | |
1671 | ||
4588ec20 JB |
1672 | return; |
1673 | } | |
1674 | ||
1675 | if (!olen) | |
1676 | { | |
502b9b64 | 1677 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1678 | ? 0 : count_blanks (nbody); |
1679 | if (nlen > nsp) | |
1680 | { | |
1681 | cursor_to (vpos, nsp); | |
1682 | write_glyphs (nbody + nsp, nlen - nsp); | |
1683 | } | |
1684 | ||
502b9b64 JB |
1685 | /* Exchange contents between current_frame and new_frame. */ |
1686 | temp = desired_frame->glyphs[vpos]; | |
1687 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1688 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1689 | |
60a8948a RS |
1690 | /* Exchange charstarts between current_frame and new_frame. */ |
1691 | temp1 = desired_frame->charstarts[vpos]; | |
1692 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1693 | current_frame->charstarts[vpos] = temp1; | |
1694 | ||
4588ec20 JB |
1695 | return; |
1696 | } | |
1697 | ||
1698 | obody[olen] = 1; | |
1699 | save = nbody[nlen]; | |
1700 | nbody[nlen] = 0; | |
1701 | ||
1702 | /* Compute number of leading blanks in old and new contents. */ | |
1703 | osp = count_blanks (obody); | |
502b9b64 | 1704 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1705 | nsp = count_blanks (nbody); |
1706 | else | |
1707 | nsp = 0; | |
1708 | ||
1709 | /* Compute number of matching chars starting with first nonblank. */ | |
1710 | begmatch = count_match (obody + osp, nbody + nsp); | |
1711 | ||
1712 | /* Spaces in new match implicit space past the end of old. */ | |
1713 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1714 | if (!must_write_spaces && osp + begmatch == olen) | |
1715 | { | |
1716 | np1 = nbody + nsp; | |
1717 | while (np1[begmatch] == SPACEGLYPH) | |
1718 | begmatch++; | |
1719 | } | |
1720 | ||
1721 | /* Avoid doing insert/delete char | |
1722 | just cause number of leading spaces differs | |
1723 | when the following text does not match. */ | |
1724 | if (begmatch == 0 && osp != nsp) | |
1725 | osp = nsp = min (osp, nsp); | |
1726 | ||
1727 | /* Find matching characters at end of line */ | |
1728 | op1 = obody + olen; | |
1729 | np1 = nbody + nlen; | |
1730 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1731 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1732 | { | |
1733 | op1--; | |
1734 | np1--; | |
1735 | } | |
1736 | endmatch = obody + olen - op1; | |
1737 | ||
1738 | /* Put correct value back in nbody[nlen]. | |
1739 | This is important because direct_output_for_insert | |
1740 | can write into the line at a later point. | |
1741 | If this screws up the zero at the end of the line, re-establish it. */ | |
1742 | nbody[nlen] = save; | |
1743 | obody[olen] = 0; | |
1744 | ||
1745 | /* tem gets the distance to insert or delete. | |
1746 | endmatch is how many characters we save by doing so. | |
1747 | Is it worth it? */ | |
1748 | ||
1749 | tem = (nlen - nsp) - (olen - osp); | |
1750 | if (endmatch && tem | |
502b9b64 | 1751 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1752 | endmatch = 0; |
1753 | ||
1754 | /* nsp - osp is the distance to insert or delete. | |
1755 | If that is nonzero, begmatch is known to be nonzero also. | |
1756 | begmatch + endmatch is how much we save by doing the ins/del. | |
1757 | Is it worth it? */ | |
1758 | ||
1759 | if (nsp != osp | |
1760 | && (!char_ins_del_ok | |
502b9b64 | 1761 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1762 | { |
1763 | begmatch = 0; | |
1764 | endmatch = 0; | |
1765 | osp = nsp = min (osp, nsp); | |
1766 | } | |
1767 | ||
1768 | /* Now go through the line, inserting, writing and | |
1769 | deleting as appropriate. */ | |
1770 | ||
1771 | if (osp > nsp) | |
1772 | { | |
1773 | cursor_to (vpos, nsp); | |
1774 | delete_glyphs (osp - nsp); | |
1775 | } | |
1776 | else if (nsp > osp) | |
1777 | { | |
1778 | /* If going to delete chars later in line | |
1779 | and insert earlier in the line, | |
1780 | must delete first to avoid losing data in the insert */ | |
1781 | if (endmatch && nlen < olen + nsp - osp) | |
1782 | { | |
1783 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1784 | delete_glyphs (olen + nsp - osp - nlen); | |
1785 | olen = nlen - (nsp - osp); | |
1786 | } | |
1787 | cursor_to (vpos, osp); | |
1788 | insert_glyphs ((char *)0, nsp - osp); | |
1789 | } | |
1790 | olen += nsp - osp; | |
1791 | ||
1792 | tem = nsp + begmatch + endmatch; | |
1793 | if (nlen != tem || olen != tem) | |
1794 | { | |
1795 | cursor_to (vpos, nsp + begmatch); | |
1796 | if (!endmatch || nlen == olen) | |
1797 | { | |
1798 | /* If new text being written reaches right margin, | |
1799 | there is no need to do clear-to-eol at the end. | |
1800 | (and it would not be safe, since cursor is not | |
1801 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1802 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1803 | olen = 0; |
1804 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1805 | ||
1806 | #ifdef obsolete | |
1807 | ||
1808 | /* the following code loses disastrously if tem == nlen. | |
1809 | Rather than trying to fix that case, I am trying the simpler | |
1810 | solution found above. */ | |
1811 | ||
1812 | /* If the text reaches to the right margin, | |
1813 | it will lose one way or another (depending on AutoWrap) | |
1814 | to clear to end of line after outputting all the text. | |
1815 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1816 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1817 | { |
1818 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1819 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1820 | clear_end_of_line (olen); | |
1821 | olen = 0; /* Don't let it be cleared again later */ | |
1822 | write_glyphs (nbody + nlen - 1, 1); | |
1823 | } | |
1824 | else | |
1825 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1826 | #endif /* OBSOLETE */ | |
1827 | ||
1828 | } | |
1829 | else if (nlen > olen) | |
1830 | { | |
1831 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1832 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1833 | olen = nlen; | |
1834 | } | |
1835 | else if (olen > nlen) | |
1836 | { | |
1837 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1838 | delete_glyphs (olen - nlen); | |
1839 | olen = nlen; | |
1840 | } | |
1841 | } | |
1842 | ||
1843 | just_erase: | |
1844 | /* If any unerased characters remain after the new line, erase them. */ | |
1845 | if (olen > nlen) | |
1846 | { | |
1847 | cursor_to (vpos, nlen); | |
1848 | clear_end_of_line (olen); | |
1849 | } | |
1850 | ||
502b9b64 JB |
1851 | /* Exchange contents between current_frame and new_frame. */ |
1852 | temp = desired_frame->glyphs[vpos]; | |
1853 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1854 | current_frame->glyphs[vpos] = temp; | |
60a8948a RS |
1855 | |
1856 | /* Exchange charstarts between current_frame and new_frame. */ | |
1857 | temp1 = desired_frame->charstarts[vpos]; | |
1858 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1859 | current_frame->charstarts[vpos] = temp1; | |
4588ec20 JB |
1860 | } |
1861 | \f | |
267ad509 | 1862 | /* A vector of size >= NFRAMES + 3 * NBUFFERS + 1, containing the session's |
078b3696 KH |
1863 | frames, buffers, buffer-read-only flags, and buffer-modified-flags, |
1864 | and a trailing sentinel (so we don't need to add length checks). */ | |
1865 | static Lisp_Object frame_and_buffer_state; | |
1866 | ||
1867 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
1868 | Sframe_or_buffer_changed_p, 0, 0, 0, | |
1869 | "Return non-nil if the frame and buffer state appears to have changed.\n\ | |
1870 | The state variable is an internal vector containing all frames and buffers,\n\ | |
1871 | along with the buffers' read-only and modified flags, which allows a fast\n\ | |
1872 | check to see whether the menu bars might need to be recomputed.\n\ | |
1873 | If this function returns non-nil, it updates the internal vector to reflect\n\ | |
1874 | the current state.\n") | |
1875 | () | |
1876 | { | |
1877 | Lisp_Object tail, frame, buf; | |
1878 | Lisp_Object *vecp; | |
1879 | int n; | |
1880 | vecp = XVECTOR (frame_and_buffer_state)->contents; | |
1881 | FOR_EACH_FRAME (tail, frame) | |
1882 | if (!EQ (*vecp++, frame)) | |
1883 | goto changed; | |
1884 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1885 | { | |
1886 | buf = XCONS (XCONS (tail)->car)->cdr; | |
1887 | if (!EQ (*vecp++, buf)) | |
1888 | goto changed; | |
1889 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
1890 | goto changed; | |
1891 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
1892 | goto changed; | |
1893 | } | |
1894 | return Qnil; | |
1895 | changed: | |
1896 | n = 1; | |
1897 | FOR_EACH_FRAME (tail, frame) | |
1898 | n++; | |
1899 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1900 | n += 3; | |
267ad509 KH |
1901 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ |
1902 | if (n > XVECTOR (frame_and_buffer_state)->size | |
1903 | || n < XVECTOR (frame_and_buffer_state)->size / 2) | |
1904 | frame_and_buffer_state = Fmake_vector (make_number (n), Qlambda); | |
078b3696 KH |
1905 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1906 | FOR_EACH_FRAME (tail, frame) | |
1907 | *vecp++ = frame; | |
1908 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1909 | { | |
1910 | buf = XCONS (XCONS (tail)->car)->cdr; | |
1911 | *vecp++ = buf; | |
1912 | *vecp++ = XBUFFER (buf)->read_only; | |
1913 | *vecp++ = Fbuffer_modified_p (buf); | |
1914 | } | |
267ad509 KH |
1915 | /* If we left any slack in the vector, fill it up now. */ |
1916 | for (; n < XVECTOR (frame_and_buffer_state)->size; ++n) | |
1917 | *vecp++ = Qlambda; | |
078b3696 KH |
1918 | return Qt; |
1919 | } | |
1920 | \f | |
4588ec20 JB |
1921 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
1922 | 1, 1, "FOpen termscript file: ", | |
1923 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1924 | FILE = nil means just close any termscript file currently open.") | |
1925 | (file) | |
1926 | Lisp_Object file; | |
1927 | { | |
1928 | if (termscript != 0) fclose (termscript); | |
1929 | termscript = 0; | |
1930 | ||
efb859b4 | 1931 | if (! NILP (file)) |
4588ec20 JB |
1932 | { |
1933 | file = Fexpand_file_name (file, Qnil); | |
1934 | termscript = fopen (XSTRING (file)->data, "w"); | |
1935 | if (termscript == 0) | |
1936 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1937 | } | |
1938 | return Qnil; | |
1939 | } | |
1940 | \f | |
1941 | ||
1942 | #ifdef SIGWINCH | |
efb859b4 | 1943 | SIGTYPE |
4588ec20 JB |
1944 | window_change_signal () |
1945 | { | |
1946 | int width, height; | |
1947 | extern int errno; | |
1948 | int old_errno = errno; | |
1949 | ||
502b9b64 | 1950 | get_frame_size (&width, &height); |
4588ec20 | 1951 | |
502b9b64 JB |
1952 | /* The frame size change obviously applies to a termcap-controlled |
1953 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 1954 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 1955 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
1956 | but don't reallocate the data structures now. Let that be done |
1957 | later outside of the signal handler. */ | |
1958 | ||
1959 | { | |
35f56f96 | 1960 | Lisp_Object tail, frame; |
4588ec20 | 1961 | |
35f56f96 | 1962 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1963 | { |
35f56f96 | 1964 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 1965 | { |
35f56f96 | 1966 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
1967 | break; |
1968 | } | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | signal (SIGWINCH, window_change_signal); | |
1973 | errno = old_errno; | |
1974 | } | |
1975 | #endif /* SIGWINCH */ | |
1976 | ||
1977 | ||
502b9b64 | 1978 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
1979 | |
1980 | do_pending_window_change () | |
1981 | { | |
1982 | /* If window_change_signal should have run before, run it now. */ | |
1983 | while (delayed_size_change) | |
1984 | { | |
35f56f96 | 1985 | Lisp_Object tail, frame; |
4588ec20 JB |
1986 | |
1987 | delayed_size_change = 0; | |
1988 | ||
35f56f96 | 1989 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1990 | { |
35f56f96 JB |
1991 | FRAME_PTR f = XFRAME (frame); |
1992 | ||
502b9b64 JB |
1993 | int height = FRAME_NEW_HEIGHT (f); |
1994 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 1995 | |
08f7aa3e | 1996 | if (height != 0 || width != 0) |
b6a65ac2 | 1997 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
1998 | } |
1999 | } | |
2000 | } | |
2001 | ||
2002 | ||
502b9b64 | 2003 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 2004 | indicate no change is to take place. |
4588ec20 | 2005 | |
b6a65ac2 JB |
2006 | If DELAY is non-zero, then assume we're being called from a signal |
2007 | handler, and queue the change for later - perhaps the next | |
2008 | redisplay. Since this tries to resize windows, we can't call it | |
2009 | from a signal handler. */ | |
2010 | ||
2011 | change_frame_size (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 2012 | register FRAME_PTR frame; |
b6a65ac2 | 2013 | int newheight, newwidth, pretend; |
4588ec20 JB |
2014 | { |
2015 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 2016 | if (delay) |
4588ec20 | 2017 | { |
b6a65ac2 | 2018 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 2019 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
2020 | delayed_size_change = 1; |
2021 | return; | |
2022 | } | |
2023 | ||
502b9b64 JB |
2024 | /* This size-change overrides any pending one for this frame. */ |
2025 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
2026 | FRAME_NEW_WIDTH (frame) = 0; |
2027 | ||
08f7aa3e | 2028 | /* If an argument is zero, set it to the current value. */ |
b6a65ac2 JB |
2029 | newheight || (newheight = FRAME_HEIGHT (frame)); |
2030 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 2031 | |
b6a65ac2 JB |
2032 | /* Round up to the smallest acceptable size. */ |
2033 | check_frame_size (frame, &newheight, &newwidth); | |
2034 | ||
2035 | /* If we're not changing the frame size, quit now. */ | |
2036 | if (newheight == FRAME_HEIGHT (frame) | |
2037 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
2038 | return; |
2039 | ||
b6a65ac2 | 2040 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 2041 | { |
b6a65ac2 | 2042 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 2043 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 2044 | { |
502b9b64 JB |
2045 | /* Frame has both root and minibuffer. */ |
2046 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 2047 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
502b9b64 | 2048 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
b6a65ac2 | 2049 | = newheight - 1; |
502b9b64 | 2050 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
2051 | } |
2052 | else | |
502b9b64 | 2053 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
2054 | set_window_height (FRAME_ROOT_WINDOW (frame), |
2055 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
2056 | |
2057 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
2058 | FrameRows = newheight; | |
4588ec20 JB |
2059 | |
2060 | #if 0 | |
502b9b64 | 2061 | if (frame->output_method == output_termcap) |
4588ec20 | 2062 | { |
b6a65ac2 | 2063 | frame_height = newheight; |
4588ec20 | 2064 | if (!pretend) |
b6a65ac2 | 2065 | FrameRows = newheight; |
4588ec20 JB |
2066 | } |
2067 | #endif | |
2068 | } | |
2069 | ||
b6a65ac2 | 2070 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 2071 | { |
502b9b64 | 2072 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 2073 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 2074 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 2075 | |
b6a65ac2 | 2076 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 2077 | FrameCols = newwidth; |
4588ec20 | 2078 | #if 0 |
502b9b64 | 2079 | if (frame->output_method == output_termcap) |
4588ec20 | 2080 | { |
502b9b64 | 2081 | frame_width = newwidth; |
4588ec20 | 2082 | if (!pretend) |
502b9b64 | 2083 | FrameCols = newwidth; |
4588ec20 JB |
2084 | } |
2085 | #endif | |
2086 | } | |
2087 | ||
b6a65ac2 JB |
2088 | FRAME_HEIGHT (frame) = newheight; |
2089 | FRAME_WIDTH (frame) = newwidth; | |
986e61b8 RS |
2090 | |
2091 | if (FRAME_CURSOR_X (frame) >= FRAME_WIDTH (frame)) | |
2092 | FRAME_CURSOR_X (frame) = FRAME_WIDTH (frame) - 1; | |
2093 | if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) | |
2094 | FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; | |
2095 | ||
502b9b64 JB |
2096 | remake_frame_glyphs (frame); |
2097 | calculate_costs (frame); | |
4588ec20 JB |
2098 | } |
2099 | \f | |
2100 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
2101 | Ssend_string_to_terminal, 1, 1, 0, | |
2102 | "Send STRING to the terminal without alteration.\n\ | |
2103 | Control characters in STRING will have terminal-dependent effects.") | |
2104 | (str) | |
2105 | Lisp_Object str; | |
2106 | { | |
2107 | CHECK_STRING (str, 0); | |
2108 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
2109 | fflush (stdout); | |
2110 | if (termscript) | |
2111 | { | |
2112 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
2113 | fflush (termscript); | |
2114 | } | |
2115 | return Qnil; | |
2116 | } | |
2117 | ||
2118 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
2119 | "Beep, or flash the screen.\n\ | |
2120 | Also, unless an argument is given,\n\ | |
2121 | terminate any keyboard macro currently executing.") | |
2122 | (arg) | |
2123 | Lisp_Object arg; | |
2124 | { | |
efb859b4 | 2125 | if (!NILP (arg)) |
4588ec20 | 2126 | { |
7fa788da RS |
2127 | if (noninteractive) |
2128 | putchar (07); | |
2129 | else | |
2130 | ring_bell (); | |
4588ec20 JB |
2131 | fflush (stdout); |
2132 | } | |
2133 | else | |
2134 | bitch_at_user (); | |
2135 | ||
2136 | return Qnil; | |
2137 | } | |
2138 | ||
2139 | bitch_at_user () | |
2140 | { | |
2141 | if (noninteractive) | |
2142 | putchar (07); | |
2143 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
2144 | error ("Keyboard macro terminated by a command ringing the bell"); | |
2145 | else | |
2146 | ring_bell (); | |
2147 | fflush (stdout); | |
2148 | } | |
2149 | ||
2150 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 2151 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
2152 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2153 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2154 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2155 | Emacs was built without floating point support.\n\ | |
2156 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
2157 | (seconds, milliseconds) |
2158 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 2159 | { |
767229f8 | 2160 | int sec, usec; |
4588ec20 | 2161 | |
767229f8 JB |
2162 | if (NILP (milliseconds)) |
2163 | XSET (milliseconds, Lisp_Int, 0); | |
2164 | else | |
2165 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2166 | usec = XINT (milliseconds) * 1000; |
2167 | ||
2168 | #ifdef LISP_FLOAT_TYPE | |
2169 | { | |
2170 | double duration = extract_float (seconds); | |
2171 | sec = (int) duration; | |
2172 | usec += (duration - sec) * 1000000; | |
2173 | } | |
2174 | #else | |
2175 | CHECK_NUMBER (seconds, 0); | |
2176 | sec = XINT (seconds); | |
2177 | #endif | |
4588ec20 | 2178 | |
a41f8bed | 2179 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2180 | if (sec == 0 && usec != 0) |
2181 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 2182 | #endif |
767229f8 JB |
2183 | |
2184 | /* Assure that 0 <= usec < 1000000. */ | |
2185 | if (usec < 0) | |
2186 | { | |
2187 | /* We can't rely on the rounding being correct if user is negative. */ | |
2188 | if (-1000000 < usec) | |
2189 | sec--, usec += 1000000; | |
2190 | else | |
2191 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 2192 | } |
767229f8 JB |
2193 | else |
2194 | sec += usec / 1000000, usec %= 1000000; | |
2195 | ||
5c48f0da | 2196 | if (sec <= 0) |
767229f8 | 2197 | return Qnil; |
4588ec20 | 2198 | |
f76475ad JB |
2199 | { |
2200 | Lisp_Object zero; | |
2201 | ||
2202 | XFASTINT (zero) = 0; | |
2203 | wait_reading_process_input (sec, usec, zero, 0); | |
2204 | } | |
d1af74e9 | 2205 | |
767229f8 JB |
2206 | /* We should always have wait_reading_process_input; we have a dummy |
2207 | implementation for systems which don't support subprocesses. */ | |
2208 | #if 0 | |
2209 | /* No wait_reading_process_input */ | |
4588ec20 JB |
2210 | immediate_quit = 1; |
2211 | QUIT; | |
2212 | ||
2213 | #ifdef VMS | |
2214 | sys_sleep (sec); | |
2215 | #else /* not VMS */ | |
2216 | /* The reason this is done this way | |
2217 | (rather than defined (H_S) && defined (H_T)) | |
2218 | is because the VMS preprocessor doesn't grok `defined' */ | |
2219 | #ifdef HAVE_SELECT | |
a41f8bed JB |
2220 | EMACS_GET_TIME (end_time); |
2221 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 2222 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 2223 | |
4588ec20 JB |
2224 | while (1) |
2225 | { | |
a41f8bed JB |
2226 | EMACS_GET_TIME (timeout); |
2227 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2228 | if (EMACS_TIME_NEG_P (timeout) | |
2229 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
2230 | break; |
2231 | } | |
4588ec20 JB |
2232 | #else /* not HAVE_SELECT */ |
2233 | sleep (sec); | |
2234 | #endif /* HAVE_SELECT */ | |
2235 | #endif /* not VMS */ | |
2236 | ||
2237 | immediate_quit = 0; | |
2238 | #endif /* no subprocesses */ | |
2239 | ||
2240 | return Qnil; | |
2241 | } | |
2242 | ||
f76475ad JB |
2243 | /* This is just like wait_reading_process_input, except that |
2244 | it does the redisplay. | |
2245 | ||
ea0d86af RS |
2246 | It's also much like Fsit_for, except that it can be used for |
2247 | waiting for input as well. One differnce is that sit_for | |
2248 | does not call prepare_menu_bars; Fsit_for does call that. */ | |
4588ec20 | 2249 | |
f76475ad JB |
2250 | Lisp_Object |
2251 | sit_for (sec, usec, reading, display) | |
2252 | int sec, usec, reading, display; | |
2253 | { | |
2254 | Lisp_Object read_kbd; | |
4588ec20 JB |
2255 | |
2256 | if (detect_input_pending ()) | |
2257 | return Qnil; | |
4588ec20 | 2258 | |
f76475ad JB |
2259 | if (display) |
2260 | redisplay_preserve_echo_area (); | |
4588ec20 | 2261 | |
dfdb645c JB |
2262 | if (sec == 0 && usec == 0) |
2263 | return Qt; | |
2264 | ||
4588ec20 | 2265 | #ifdef SIGIO |
8fc798e9 | 2266 | gobble_input (0); |
f76475ad JB |
2267 | #endif |
2268 | ||
2269 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
2270 | wait_reading_process_input (sec, usec, read_kbd, display); | |
2271 | ||
d1af74e9 | 2272 | |
500ab754 JB |
2273 | /* wait_reading_process_input should always be available now; it is |
2274 | simulated in a simple way on systems that don't support | |
2275 | subprocesses. */ | |
2276 | #if 0 | |
2277 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
2278 | immediate_quit = 1; |
2279 | QUIT; | |
2280 | ||
2281 | waitchannels = 1; | |
2282 | #ifdef VMS | |
f76475ad | 2283 | input_wait_timeout (XINT (arg)); |
4588ec20 | 2284 | #else /* not VMS */ |
d1af74e9 JB |
2285 | #ifndef HAVE_TIMEVAL |
2286 | timeout_sec = sec; | |
2287 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
2288 | #else /* HAVE_TIMEVAL */ | |
2289 | timeout.tv_sec = sec; | |
2290 | timeout.tv_usec = usec; | |
4588ec20 | 2291 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 2292 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
2293 | #endif /* not VMS */ |
2294 | ||
2295 | immediate_quit = 0; | |
d1af74e9 | 2296 | #endif |
4588ec20 JB |
2297 | |
2298 | return detect_input_pending () ? Qnil : Qt; | |
2299 | } | |
2300 | ||
f76475ad | 2301 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2302 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2303 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2304 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2305 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2306 | Emacs was built without floating point support.\n\ | |
2307 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
f76475ad JB |
2308 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
2309 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
2310 | if input is available before it starts.\n\ | |
2311 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2312 | (seconds, milliseconds, nodisp) |
2313 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2314 | { |
767229f8 | 2315 | int sec, usec; |
f76475ad | 2316 | |
767229f8 JB |
2317 | if (NILP (milliseconds)) |
2318 | XSET (milliseconds, Lisp_Int, 0); | |
2319 | else | |
2320 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2321 | usec = XINT (milliseconds) * 1000; |
2322 | ||
2323 | #ifdef LISP_FLOAT_TYPE | |
2324 | { | |
2325 | double duration = extract_float (seconds); | |
2326 | sec = (int) duration; | |
2327 | usec += (duration - sec) * 1000000; | |
2328 | } | |
2329 | #else | |
2330 | CHECK_NUMBER (seconds, 0); | |
2331 | sec = XINT (seconds); | |
2332 | #endif | |
f76475ad | 2333 | |
f76475ad | 2334 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2335 | if (usec != 0 && sec == 0) |
2336 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2337 | #endif |
f76475ad | 2338 | |
ea0d86af RS |
2339 | if (NILP (nodisp)) |
2340 | prepare_menu_bars (); | |
f76475ad JB |
2341 | return sit_for (sec, usec, 0, NILP (nodisp)); |
2342 | } | |
4588ec20 JB |
2343 | \f |
2344 | char *terminal_type; | |
2345 | ||
2346 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2347 | /* Determine terminal type and set terminal_driver */ | |
2348 | /* Then invoke its decoding routine to set up variables | |
2349 | in the terminal package */ | |
2350 | ||
2351 | init_display () | |
2352 | { | |
2353 | #ifdef HAVE_X_WINDOWS | |
2354 | extern int display_arg; | |
2355 | #endif | |
2356 | ||
2357 | meta_key = 0; | |
2358 | inverse_video = 0; | |
2359 | cursor_in_echo_area = 0; | |
2360 | terminal_type = (char *) 0; | |
2361 | ||
1315c181 JB |
2362 | /* Now is the time to initialize this; it's used by init_sys_modes |
2363 | during startup. */ | |
2364 | Vwindow_system = Qnil; | |
4588ec20 | 2365 | |
1315c181 JB |
2366 | /* If the user wants to use a window system, we shouldn't bother |
2367 | initializing the terminal. This is especially important when the | |
2368 | terminal is so dumb that emacs gives up before and doesn't bother | |
2369 | using the window system. | |
4588ec20 | 2370 | |
1315c181 JB |
2371 | If the DISPLAY environment variable is set, try to use X, and die |
2372 | with an error message if that doesn't work. */ | |
4588ec20 JB |
2373 | |
2374 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2375 | if (! display_arg) |
2376 | { | |
2377 | #ifdef VMS | |
5de9f849 | 2378 | display_arg = (getenv ("DECW$DISPLAY") != 0); |
d460af17 | 2379 | #else |
5de9f849 | 2380 | display_arg = (getenv ("DISPLAY") != 0); |
d460af17 | 2381 | #endif |
f040093a | 2382 | } |
d460af17 JB |
2383 | |
2384 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2385 | { |
2386 | Vwindow_system = intern ("x"); | |
2387 | #ifdef HAVE_X11 | |
2388 | Vwindow_system_version = make_number (11); | |
2389 | #else | |
2390 | Vwindow_system_version = make_number (10); | |
2391 | #endif | |
2392 | return; | |
2393 | } | |
2394 | #endif /* HAVE_X_WINDOWS */ | |
2395 | ||
2396 | /* If no window system has been specified, try to use the terminal. */ | |
2397 | if (! isatty (0)) | |
2398 | { | |
2399 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2400 | exit (1); | |
2401 | } | |
2402 | ||
2403 | /* Look at the TERM variable */ | |
2404 | terminal_type = (char *) getenv ("TERM"); | |
2405 | if (!terminal_type) | |
2406 | { | |
2407 | #ifdef VMS | |
2408 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2409 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2410 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2411 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2412 | #else | |
2413 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2414 | #endif | |
2415 | exit (1); | |
2416 | } | |
2417 | ||
2418 | #ifdef VMS | |
2419 | /* VMS DCL tends to upcase things, so downcase term type. | |
2420 | Hardly any uppercase letters in terminal types; should be none. */ | |
2421 | { | |
2422 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2423 | char *p; | |
2424 | ||
2425 | strcpy (new, terminal_type); | |
2426 | ||
2427 | for (p = new; *p; p++) | |
2428 | if (isupper (*p)) | |
2429 | *p = tolower (*p); | |
2430 | ||
2431 | terminal_type = new; | |
2432 | } | |
2433 | #endif | |
2434 | ||
2435 | term_init (terminal_type); | |
2436 | ||
502b9b64 JB |
2437 | remake_frame_glyphs (selected_frame); |
2438 | calculate_costs (selected_frame); | |
4588ec20 JB |
2439 | |
2440 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2441 | FRAME_CURSOR_X (selected_frame) = 0; |
2442 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2443 | |
2444 | #ifdef SIGWINCH | |
2445 | #ifndef CANNOT_DUMP | |
2446 | if (initialized) | |
2447 | #endif /* CANNOT_DUMP */ | |
2448 | signal (SIGWINCH, window_change_signal); | |
2449 | #endif /* SIGWINCH */ | |
2450 | } | |
2451 | \f | |
2452 | syms_of_display () | |
2453 | { | |
502b9b64 JB |
2454 | #ifdef MULTI_FRAME |
2455 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2456 | #endif |
2457 | defsubr (&Sredraw_display); | |
078b3696 | 2458 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
2459 | defsubr (&Sopen_termscript); |
2460 | defsubr (&Sding); | |
2461 | defsubr (&Ssit_for); | |
2462 | defsubr (&Ssleep_for); | |
2463 | defsubr (&Ssend_string_to_terminal); | |
2464 | ||
078b3696 KH |
2465 | frame_and_buffer_state = Fmake_vector (make_number (1), Qlambda); |
2466 | staticpro (&frame_and_buffer_state); | |
2467 | ||
4588ec20 JB |
2468 | DEFVAR_INT ("baud-rate", &baud_rate, |
2469 | "The output baud rate of the terminal.\n\ | |
2470 | On most systems, changing this value will affect the amount of padding\n\ | |
2471 | and the other strategic decisions made during redisplay."); | |
2472 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2473 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2474 | This means everything is in inverse video which otherwise would not be."); |
2475 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2476 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2477 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2478 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2479 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2480 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2481 | It is up to you to set this variable if your terminal can do that."); |
2482 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2483 | "A symbol naming the window-system under which Emacs is running\n\ | |
2484 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2485 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2486 | "The version number of the window system in use.\n\ | |
2487 | For X windows, this is 10 or 11."); | |
2488 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2489 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2490 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2491 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2492 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2493 | Each element can be:\n\ | |
2494 | integer: a glyph code which this glyph is an alias for.\n\ | |
2495 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2496 | nil: this glyph mod 256 is char code to output,\n\ | |
6666f05a | 2497 | and this glyph / 256 is face code for X windows (see `face-id')."); |
4588ec20 JB |
2498 | Vglyph_table = Qnil; |
2499 | ||
2500 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2501 | "Display table to use for buffers that specify none.\n\ | |
2502 | See `buffer-display-table' for more information."); | |
2503 | Vstandard_display_table = Qnil; | |
2504 | ||
2505 | /* Initialize `window-system', unless init_display already decided it. */ | |
2506 | #ifdef CANNOT_DUMP | |
2507 | if (noninteractive) | |
2508 | #endif | |
2509 | { | |
2510 | Vwindow_system = Qnil; | |
2511 | Vwindow_system_version = Qnil; | |
2512 | } | |
2513 | } |