Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
f8c25f1b | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 8 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
4588ec20 JB |
20 | |
21 | ||
22 | #include <signal.h> | |
23 | ||
18160b98 | 24 | #include <config.h> |
565620a5 RS |
25 | |
26 | #include <stdio.h> | |
4588ec20 JB |
27 | #include <ctype.h> |
28 | ||
47099d6f | 29 | #include "lisp.h" |
4588ec20 JB |
30 | #include "termchar.h" |
31 | #include "termopts.h" | |
3be08bea | 32 | #include "termhooks.h" |
a0879520 | 33 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
34 | #include "dispextern.h" |
35 | #include "cm.h" | |
4588ec20 | 36 | #include "buffer.h" |
24e86043 | 37 | #include "charset.h" |
502b9b64 | 38 | #include "frame.h" |
4588ec20 JB |
39 | #include "window.h" |
40 | #include "commands.h" | |
41 | #include "disptab.h" | |
42 | #include "indent.h" | |
d169fe39 | 43 | #include "intervals.h" |
97cf50e7 | 44 | #include "blockinput.h" |
4588ec20 | 45 | |
24e86043 KH |
46 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
47 | include the following file. */ | |
48 | /* #include "systty.h" */ | |
58b2bb63 | 49 | #include "syssignal.h" |
a41f8bed | 50 | |
4588ec20 JB |
51 | #ifdef HAVE_X_WINDOWS |
52 | #include "xterm.h" | |
53 | #endif /* HAVE_X_WINDOWS */ | |
54 | ||
fd2e066a GV |
55 | #ifdef HAVE_NTGUI |
56 | #include "w32term.h" | |
57 | #endif /* HAVE_NTGUI */ | |
58 | ||
6cbd1643 RS |
59 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
60 | #include "systime.h" | |
61 | ||
3883a901 RS |
62 | #include <errno.h> |
63 | ||
4588ec20 JB |
64 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
65 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
66 | ||
4588ec20 JB |
67 | /* Get number of chars of output now in the buffer of a stdio stream. |
68 | This ought to be built in in stdio, but it isn't. | |
69 | Some s- files override this because their stdio internals differ. */ | |
e3271ae5 | 70 | #ifdef __GNU_LIBRARY__ |
097c2824 RM |
71 | /* The s- file might have overridden the definition with one that works for |
72 | the system's C library. But we are using the GNU C library, so this is | |
73 | the right definition for every system. */ | |
3883a901 RS |
74 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
75 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
76 | #else | |
cb5558ff | 77 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 78 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
79 | #endif |
80 | #else /* not __GNU_LIBRARY__ */ | |
cb5558ff | 81 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
82 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
83 | #endif | |
e3271ae5 | 84 | #endif |
4588ec20 | 85 | |
45140e01 RS |
86 | static void change_frame_size_1 (); |
87 | ||
a41f8bed | 88 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 89 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 90 | |
502b9b64 | 91 | int frame_garbaged; |
4588ec20 JB |
92 | |
93 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
94 | ||
95 | int display_completed; | |
96 | ||
97 | /* Lisp variable visible-bell; enables use of screen-flash | |
98 | instead of audible bell. */ | |
99 | ||
100 | int visible_bell; | |
101 | ||
502b9b64 | 102 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
103 | |
104 | int inverse_video; | |
105 | ||
106 | /* Line speed of the terminal. */ | |
107 | ||
108 | int baud_rate; | |
109 | ||
110 | /* nil or a symbol naming the window system under which emacs is | |
111 | running ('x is the only current possibility). */ | |
112 | ||
113 | Lisp_Object Vwindow_system; | |
114 | ||
115 | /* Version number of X windows: 10, 11 or nil. */ | |
116 | Lisp_Object Vwindow_system_version; | |
117 | ||
118 | /* Vector of glyph definitions. Indexed by glyph number, | |
119 | the contents are a string which is how to output the glyph. | |
120 | ||
121 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
122 | as a character code. */ | |
123 | ||
124 | Lisp_Object Vglyph_table; | |
125 | ||
126 | /* Display table to use for vectors that don't specify their own. */ | |
127 | ||
128 | Lisp_Object Vstandard_display_table; | |
129 | ||
130 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
131 | so put cursor on minibuffer after the prompt. |
132 | positive means at end of text in echo area; | |
133 | negative means at beginning of line. */ | |
4588ec20 | 134 | int cursor_in_echo_area; |
9cda4f7c RS |
135 | |
136 | Lisp_Object Qdisplay_table; | |
4588ec20 | 137 | \f |
502b9b64 | 138 | /* The currently selected frame. |
87485d6f MW |
139 | In a single-frame version, this variable always holds the address of |
140 | the_only_frame. */ | |
4588ec20 | 141 | |
502b9b64 | 142 | FRAME_PTR selected_frame; |
4588ec20 | 143 | |
502b9b64 JB |
144 | /* A frame which is not just a minibuffer, or 0 if there are no such |
145 | frames. This is usually the most recent such frame that was | |
87485d6f MW |
146 | selected. In a single-frame version, this variable always holds |
147 | the address of the_only_frame. */ | |
502b9b64 | 148 | FRAME_PTR last_nonminibuf_frame; |
e5d77022 | 149 | |
4588ec20 | 150 | /* This is a vector, made larger whenever it isn't large enough, |
502b9b64 JB |
151 | which is used inside `update_frame' to hold the old contents |
152 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
153 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
154 | /* Length of vector currently allocated. */ |
155 | int ophys_lines_length; | |
156 | ||
157 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
158 | ||
159 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
160 | ||
4588ec20 | 161 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 162 | \f |
502b9b64 JB |
163 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
164 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
165 | (frame) | |
166 | Lisp_Object frame; | |
4588ec20 | 167 | { |
502b9b64 | 168 | FRAME_PTR f; |
4588ec20 | 169 | |
502b9b64 JB |
170 | CHECK_LIVE_FRAME (frame, 0); |
171 | f = XFRAME (frame); | |
172 | update_begin (f); | |
93e54836 RS |
173 | if (FRAME_MSDOS_P (f)) |
174 | set_terminal_modes (); | |
502b9b64 | 175 | clear_frame (); |
b6a65ac2 | 176 | clear_frame_records (f); |
502b9b64 | 177 | update_end (f); |
4588ec20 | 178 | fflush (stdout); |
4588ec20 JB |
179 | windows_or_buffers_changed++; |
180 | /* Mark all windows as INaccurate, | |
181 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
182 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
183 | f->garbaged = 0; | |
4588ec20 JB |
184 | return Qnil; |
185 | } | |
186 | ||
502b9b64 JB |
187 | redraw_frame (f) |
188 | FRAME_PTR f; | |
4588ec20 | 189 | { |
502b9b64 | 190 | Lisp_Object frame; |
e9c9a718 | 191 | XSETFRAME (frame, f); |
502b9b64 | 192 | Fredraw_frame (frame); |
4588ec20 JB |
193 | } |
194 | ||
35f56f96 JB |
195 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
196 | "Clear and redisplay all visible frames.") | |
197 | () | |
198 | { | |
199 | Lisp_Object tail, frame; | |
200 | ||
201 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 202 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
203 | Fredraw_frame (frame); |
204 | ||
205 | return Qnil; | |
206 | } | |
207 | ||
9223a96a RS |
208 | /* This is used when frame_garbaged is set. |
209 | Redraw the individual frames marked as garbaged. */ | |
210 | ||
211 | void | |
212 | redraw_garbaged_frames () | |
213 | { | |
214 | Lisp_Object tail, frame; | |
215 | ||
216 | FOR_EACH_FRAME (tail, frame) | |
217 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
218 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
219 | Fredraw_frame (frame); | |
220 | } | |
221 | ||
4588ec20 | 222 | \f |
502b9b64 JB |
223 | static struct frame_glyphs * |
224 | make_frame_glyphs (frame, empty) | |
225 | register FRAME_PTR frame; | |
4588ec20 JB |
226 | int empty; |
227 | { | |
228 | register int i; | |
29ec5d84 | 229 | register width = FRAME_WINDOW_WIDTH (frame); |
502b9b64 | 230 | register height = FRAME_HEIGHT (frame); |
60a8948a RS |
231 | register struct frame_glyphs *new |
232 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 233 | |
502b9b64 | 234 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
235 | new->height = height; |
236 | new->width = width; | |
237 | new->used = (int *) xmalloc (height * sizeof (int)); | |
238 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
60a8948a | 239 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
4588ec20 JB |
240 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
241 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
242 | bzero (new->enable, height * sizeof (char)); | |
243 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
244 | ||
fd2e066a GV |
245 | #ifdef HAVE_WINDOW_SYSTEM |
246 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 247 | { |
4588ec20 JB |
248 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
249 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
250 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
251 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 252 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 | 253 | } |
fd2e066a | 254 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
255 | |
256 | if (empty) | |
257 | { | |
258 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 259 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 | 260 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
d52bad65 | 261 | unsigned int total_charstarts = (width + 2) * sizeof (int); |
4588ec20 JB |
262 | |
263 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
264 | bzero (new->total_contents, total_glyphs); | |
d52bad65 RS |
265 | |
266 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
aba5d0f4 | 267 | bzero (new->total_charstarts, total_charstarts); |
4588ec20 JB |
268 | } |
269 | else | |
270 | { | |
271 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
272 | ||
273 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
274 | bzero (new->total_contents, total_glyphs); | |
275 | for (i = 0; i < height; i++) | |
276 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
60a8948a RS |
277 | |
278 | if (!FRAME_TERMCAP_P (frame)) | |
279 | { | |
280 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); | |
281 | ||
282 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
283 | bzero (new->total_charstarts, total_charstarts); | |
284 | for (i = 0; i < height; i++) | |
285 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; | |
286 | } | |
287 | else | |
288 | { | |
289 | /* Without a window system, we don't really need charstarts. | |
290 | So use a small amount of space to make enough data structure | |
291 | to prevent crashes in display_text_line. */ | |
292 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); | |
293 | for (i = 0; i < height; i++) | |
294 | new->charstarts[i] = new->total_charstarts; | |
295 | } | |
4588ec20 JB |
296 | } |
297 | ||
298 | return new; | |
299 | } | |
300 | ||
05233a7d | 301 | void |
502b9b64 JB |
302 | free_frame_glyphs (frame, glyphs) |
303 | FRAME_PTR frame; | |
304 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
305 | { |
306 | if (glyphs->total_contents) | |
9ac0d9e0 | 307 | xfree (glyphs->total_contents); |
60a8948a RS |
308 | if (glyphs->total_charstarts) |
309 | xfree (glyphs->total_charstarts); | |
4588ec20 | 310 | |
9ac0d9e0 JB |
311 | xfree (glyphs->used); |
312 | xfree (glyphs->glyphs); | |
313 | xfree (glyphs->highlight); | |
314 | xfree (glyphs->enable); | |
315 | xfree (glyphs->bufp); | |
60a8948a RS |
316 | if (glyphs->charstarts) |
317 | xfree (glyphs->charstarts); | |
4588ec20 | 318 | |
fd2e066a GV |
319 | #ifdef HAVE_WINDOW_SYSTEM |
320 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 321 | { |
9ac0d9e0 JB |
322 | xfree (glyphs->top_left_x); |
323 | xfree (glyphs->top_left_y); | |
324 | xfree (glyphs->pix_width); | |
325 | xfree (glyphs->pix_height); | |
326 | xfree (glyphs->max_ascent); | |
4588ec20 | 327 | } |
fd2e066a | 328 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 329 | |
9ac0d9e0 | 330 | xfree (glyphs); |
4588ec20 JB |
331 | } |
332 | ||
45140e01 | 333 | void |
502b9b64 JB |
334 | remake_frame_glyphs (frame) |
335 | FRAME_PTR frame; | |
4588ec20 | 336 | { |
502b9b64 JB |
337 | if (FRAME_CURRENT_GLYPHS (frame)) |
338 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
339 | if (FRAME_DESIRED_GLYPHS (frame)) | |
340 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
341 | if (FRAME_TEMP_GLYPHS (frame)) | |
342 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
343 | ||
344 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
345 | { |
346 | /* Reallocate the frame's message buffer; remember that | |
347 | echo_area_glyphs may be pointing here. */ | |
348 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
349 | ||
350 | FRAME_MESSAGE_BUF (frame) | |
351 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
24e86043 | 352 | FRAME_MESSAGE_BUF_SIZE (frame) + 1); |
832a0726 JB |
353 | |
354 | if (echo_area_glyphs == old_message_buf) | |
355 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
356 | if (previous_echo_glyphs == old_message_buf) | |
357 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
358 | } | |
4588ec20 | 359 | else |
502b9b64 | 360 | FRAME_MESSAGE_BUF (frame) |
24e86043 | 361 | = (char *) xmalloc (FRAME_MESSAGE_BUF_SIZE (frame) + 1); |
4588ec20 | 362 | |
502b9b64 JB |
363 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
364 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
365 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
8a376b3b | 366 | if (FRAME_WINDOW_P (frame) || frame == selected_frame) |
45140e01 | 367 | SET_FRAME_GARBAGED (frame); |
4588ec20 JB |
368 | } |
369 | \f | |
502b9b64 | 370 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
371 | |
372 | static int | |
373 | line_hash_code (m, vpos) | |
502b9b64 | 374 | register struct frame_glyphs *m; |
4588ec20 JB |
375 | int vpos; |
376 | { | |
377 | register GLYPH *body, *end; | |
378 | register int h = 0; | |
379 | ||
380 | if (!m->enable[vpos]) | |
381 | return 0; | |
382 | ||
94aa5d2d | 383 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
384 | so as to encourage scrolling to leave them in place. */ |
385 | if (m->highlight[vpos]) | |
386 | return -1; | |
387 | ||
388 | body = m->glyphs[vpos]; | |
389 | ||
390 | if (must_write_spaces) | |
391 | while (1) | |
392 | { | |
393 | GLYPH g = *body++; | |
394 | ||
395 | if (g == 0) | |
396 | break; | |
397 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
398 | } | |
399 | else | |
400 | while (1) | |
401 | { | |
402 | GLYPH g = *body++; | |
403 | ||
404 | if (g == 0) | |
405 | break; | |
406 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
407 | } | |
408 | ||
409 | if (h) | |
410 | return h; | |
411 | return 1; | |
412 | } | |
413 | ||
414 | /* Return number of characters in line in M at vpos VPOS, | |
415 | except don't count leading and trailing spaces | |
416 | unless the terminal requires those to be explicitly output. */ | |
417 | ||
418 | static unsigned int | |
419 | line_draw_cost (m, vpos) | |
502b9b64 | 420 | struct frame_glyphs *m; |
4588ec20 JB |
421 | int vpos; |
422 | { | |
423 | register GLYPH *beg = m->glyphs[vpos]; | |
424 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
425 | register int i; | |
426 | register int tlen = GLYPH_TABLE_LENGTH; | |
427 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
428 | ||
429 | /* Ignore trailing and leading spaces if we can. */ | |
430 | if (!must_write_spaces) | |
431 | { | |
432 | while ((end != beg) && (*end == SPACEGLYPH)) | |
433 | --end; | |
434 | if (end == beg) | |
435 | return (0); /* All blank line. */ | |
436 | ||
437 | while (*beg == SPACEGLYPH) | |
438 | ++beg; | |
439 | } | |
440 | ||
441 | /* If we don't have a glyph-table, each glyph is one character, | |
442 | so return the number of glyphs. */ | |
443 | if (tbase == 0) | |
444 | return end - beg; | |
445 | ||
446 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
447 | i = 0; | |
448 | while ((beg <= end) && *beg) | |
449 | { | |
450 | register GLYPH g = *beg++; | |
451 | ||
452 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
453 | i += 1; | |
454 | else | |
455 | i += GLYPH_LENGTH (tbase, g); | |
456 | } | |
457 | return i; | |
458 | } | |
459 | \f | |
460 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
461 | ||
462 | The only other interface into redisplay is through setting | |
502b9b64 JB |
463 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
464 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
465 | |
466 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
467 | ||
502b9b64 | 468 | cancel_line (vpos, frame) |
4588ec20 | 469 | int vpos; |
502b9b64 | 470 | register FRAME_PTR frame; |
4588ec20 | 471 | { |
502b9b64 | 472 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
473 | } |
474 | ||
502b9b64 JB |
475 | clear_frame_records (frame) |
476 | register FRAME_PTR frame; | |
4588ec20 | 477 | { |
502b9b64 | 478 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
479 | } |
480 | ||
836d2cde RS |
481 | /* Clear out all display lines for a coming redisplay. */ |
482 | ||
483 | void | |
484 | init_desired_glyphs (frame) | |
485 | register FRAME_PTR frame; | |
486 | { | |
487 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
488 | int vpos; | |
489 | int height = FRAME_HEIGHT (frame); | |
490 | ||
491 | for (vpos = 0; vpos < height; vpos++) | |
492 | desired_glyphs->enable[vpos] = 0; | |
493 | } | |
494 | ||
4588ec20 JB |
495 | /* Prepare to display on line VPOS starting at HPOS within it. */ |
496 | ||
497 | void | |
502b9b64 JB |
498 | get_display_line (frame, vpos, hpos) |
499 | register FRAME_PTR frame; | |
4588ec20 JB |
500 | int vpos; |
501 | register int hpos; | |
502 | { | |
502b9b64 JB |
503 | register struct frame_glyphs *glyphs; |
504 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
505 | register GLYPH *p; |
506 | ||
7c3c72ec | 507 | if (vpos < 0) |
4588ec20 JB |
508 | abort (); |
509 | ||
4588ec20 JB |
510 | if (! desired_glyphs->enable[vpos]) |
511 | { | |
512 | desired_glyphs->used[vpos] = 0; | |
513 | desired_glyphs->highlight[vpos] = 0; | |
514 | desired_glyphs->enable[vpos] = 1; | |
515 | } | |
516 | ||
517 | if (hpos > desired_glyphs->used[vpos]) | |
518 | { | |
519 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
520 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
521 | ||
522 | desired_glyphs->used[vpos] = hpos; | |
523 | while (g != end) | |
524 | *g++ = SPACEGLYPH; | |
525 | } | |
526 | } | |
527 | ||
528 | /* Like bcopy except never gets confused by overlap. */ | |
529 | ||
530 | void | |
531 | safe_bcopy (from, to, size) | |
532 | char *from, *to; | |
533 | int size; | |
534 | { | |
b5c685f4 | 535 | if (size <= 0 || from == to) |
4588ec20 JB |
536 | return; |
537 | ||
b5c685f4 JB |
538 | /* If the source and destination don't overlap, then bcopy can |
539 | handle it. If they do overlap, but the destination is lower in | |
540 | memory than the source, we'll assume bcopy can handle that. */ | |
541 | if (to < from || from + size <= to) | |
542 | bcopy (from, to, size); | |
543 | ||
544 | /* Otherwise, we'll copy from the end. */ | |
545 | else | |
4588ec20 | 546 | { |
b5c685f4 JB |
547 | register char *endf = from + size; |
548 | register char *endt = to + size; | |
4588ec20 JB |
549 | |
550 | /* If TO - FROM is large, then we should break the copy into | |
551 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
552 | TO - FROM is small, then the bcopy function call overhead | |
553 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
554 | anywhere. Since I don't think the obvious copy loop is too |
555 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
556 | if (to - from < 64) |
557 | { | |
558 | do | |
559 | *--endt = *--endf; | |
560 | while (endf != from); | |
561 | } | |
562 | else | |
563 | { | |
b5c685f4 | 564 | for (;;) |
4588ec20 JB |
565 | { |
566 | endt -= (to - from); | |
567 | endf -= (to - from); | |
568 | ||
b5c685f4 JB |
569 | if (endt < to) |
570 | break; | |
571 | ||
4588ec20 JB |
572 | bcopy (endf, endt, to - from); |
573 | } | |
b5c685f4 JB |
574 | |
575 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
576 | little left over. The amount left over is |
577 | (endt + (to - from)) - to, which is endt - from. */ | |
578 | bcopy (from, to, endt - from); | |
579 | } | |
580 | } | |
4588ec20 JB |
581 | } |
582 | ||
98038dc0 | 583 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
584 | DISTANCE may be negative. */ |
585 | ||
586 | static void | |
587 | rotate_vector (vector, size, distance) | |
588 | char *vector; | |
589 | int size; | |
590 | int distance; | |
591 | { | |
592 | char *temp = (char *) alloca (size); | |
593 | ||
594 | if (distance < 0) | |
595 | distance += size; | |
596 | ||
597 | bcopy (vector, temp + distance, size - distance); | |
598 | bcopy (vector + size - distance, temp, distance); | |
599 | bcopy (temp, vector, size); | |
600 | } | |
601 | ||
602 | /* Scroll lines from vpos FROM up to but not including vpos END | |
603 | down by AMOUNT lines (AMOUNT may be negative). | |
604 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
605 | ||
606 | int | |
d52bad65 | 607 | scroll_frame_lines (frame, from, end, amount, newpos) |
502b9b64 | 608 | register FRAME_PTR frame; |
d52bad65 | 609 | int from, end, amount, newpos; |
4588ec20 JB |
610 | { |
611 | register int i; | |
502b9b64 JB |
612 | register struct frame_glyphs *current_frame |
613 | = FRAME_CURRENT_GLYPHS (frame); | |
d52bad65 | 614 | int pos_adjust; |
29ec5d84 | 615 | int width = FRAME_WINDOW_WIDTH (frame); |
4588ec20 JB |
616 | |
617 | if (!line_ins_del_ok) | |
618 | return 0; | |
619 | ||
620 | if (amount == 0) | |
621 | return 1; | |
622 | ||
623 | if (amount > 0) | |
624 | { | |
502b9b64 | 625 | update_begin (frame); |
4588ec20 JB |
626 | set_terminal_window (end + amount); |
627 | if (!scroll_region_ok) | |
628 | ins_del_lines (end, -amount); | |
629 | ins_del_lines (from, amount); | |
630 | set_terminal_window (0); | |
631 | ||
502b9b64 | 632 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
633 | sizeof (GLYPH *) * (end + amount - from), |
634 | amount * sizeof (GLYPH *)); | |
635 | ||
60a8948a | 636 | rotate_vector (current_frame->charstarts + from, |
d52bad65 RS |
637 | sizeof (int *) * (end + amount - from), |
638 | amount * sizeof (int *)); | |
639 | ||
23b0200c RS |
640 | safe_bcopy (current_frame->used + from, |
641 | current_frame->used + from + amount, | |
642 | (end - from) * sizeof current_frame->used[0]); | |
643 | ||
644 | safe_bcopy (current_frame->highlight + from, | |
645 | current_frame->highlight + from + amount, | |
646 | (end - from) * sizeof current_frame->highlight[0]); | |
647 | ||
648 | safe_bcopy (current_frame->enable + from, | |
649 | current_frame->enable + from + amount, | |
650 | (end - from) * sizeof current_frame->enable[0]); | |
651 | ||
d52bad65 RS |
652 | /* Adjust the lines by an amount |
653 | that puts the first of them at NEWPOS. */ | |
23b0200c | 654 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
655 | |
656 | /* Offset each char position in the charstarts lines we moved | |
657 | by pos_adjust. */ | |
23b0200c | 658 | for (i = from + amount; i < end + amount; i++) |
60a8948a | 659 | { |
d52bad65 | 660 | int *line = current_frame->charstarts[i]; |
60a8948a | 661 | int col; |
23b0200c RS |
662 | for (col = 0; col < width; col++) |
663 | if (line[col] > 0) | |
664 | line[col] += pos_adjust; | |
60a8948a | 665 | } |
23b0200c | 666 | for (i = from; i < from + amount; i++) |
60a8948a | 667 | { |
d52bad65 | 668 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
669 | int col; |
670 | line[0] = -1; | |
23b0200c | 671 | for (col = 0; col < width; col++) |
60a8948a RS |
672 | line[col] = 0; |
673 | } | |
674 | ||
4588ec20 JB |
675 | /* Mark the lines made empty by scrolling as enabled, empty and |
676 | normal video. */ | |
502b9b64 JB |
677 | bzero (current_frame->used + from, |
678 | amount * sizeof current_frame->used[0]); | |
679 | bzero (current_frame->highlight + from, | |
680 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
681 | for (i = from; i < from + amount; i++) |
682 | { | |
502b9b64 | 683 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 684 | current_frame->charstarts[i][0] = -1; |
502b9b64 | 685 | current_frame->enable[i] = 1; |
4588ec20 JB |
686 | } |
687 | ||
502b9b64 JB |
688 | safe_bcopy (current_frame->bufp + from, |
689 | current_frame->bufp + from + amount, | |
690 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 | 691 | |
fd2e066a GV |
692 | #ifdef HAVE_WINDOW_SYSTEM |
693 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 694 | { |
502b9b64 JB |
695 | safe_bcopy (current_frame->top_left_x + from, |
696 | current_frame->top_left_x + from + amount, | |
697 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 698 | |
502b9b64 JB |
699 | safe_bcopy (current_frame->top_left_y + from, |
700 | current_frame->top_left_y + from + amount, | |
701 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 702 | |
502b9b64 JB |
703 | safe_bcopy (current_frame->pix_width + from, |
704 | current_frame->pix_width + from + amount, | |
705 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 706 | |
502b9b64 JB |
707 | safe_bcopy (current_frame->pix_height + from, |
708 | current_frame->pix_height + from + amount, | |
709 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
710 | |
711 | safe_bcopy (current_frame->max_ascent + from, | |
712 | current_frame->max_ascent + from + amount, | |
713 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 | 714 | } |
fd2e066a | 715 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 716 | |
502b9b64 | 717 | update_end (frame); |
4588ec20 JB |
718 | } |
719 | if (amount < 0) | |
720 | { | |
502b9b64 | 721 | update_begin (frame); |
4588ec20 JB |
722 | set_terminal_window (end); |
723 | ins_del_lines (from + amount, amount); | |
724 | if (!scroll_region_ok) | |
725 | ins_del_lines (end + amount, -amount); | |
726 | set_terminal_window (0); | |
727 | ||
502b9b64 | 728 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
729 | sizeof (GLYPH *) * (end - from - amount), |
730 | amount * sizeof (GLYPH *)); | |
731 | ||
60a8948a | 732 | rotate_vector (current_frame->charstarts + from + amount, |
d52bad65 RS |
733 | sizeof (int *) * (end - from - amount), |
734 | amount * sizeof (int *)); | |
735 | ||
23b0200c RS |
736 | safe_bcopy (current_frame->used + from, |
737 | current_frame->used + from + amount, | |
738 | (end - from) * sizeof current_frame->used[0]); | |
739 | ||
740 | safe_bcopy (current_frame->highlight + from, | |
741 | current_frame->highlight + from + amount, | |
742 | (end - from) * sizeof current_frame->highlight[0]); | |
743 | ||
744 | safe_bcopy (current_frame->enable + from, | |
745 | current_frame->enable + from + amount, | |
746 | (end - from) * sizeof current_frame->enable[0]); | |
747 | ||
d52bad65 RS |
748 | /* Adjust the lines by an amount |
749 | that puts the first of them at NEWPOS. */ | |
23b0200c | 750 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
751 | |
752 | /* Offset each char position in the charstarts lines we moved | |
753 | by pos_adjust. */ | |
754 | for (i = from + amount; i < end + amount; i++) | |
755 | { | |
d52bad65 | 756 | int *line = current_frame->charstarts[i]; |
60a8948a | 757 | int col; |
23b0200c RS |
758 | for (col = 0; col < width; col++) |
759 | if (line[col] > 0) | |
760 | line[col] += pos_adjust; | |
60a8948a | 761 | } |
23b0200c | 762 | for (i = end + amount; i < end; i++) |
60a8948a | 763 | { |
d52bad65 | 764 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
765 | int col; |
766 | line[0] = -1; | |
23b0200c | 767 | for (col = 0; col < width; col++) |
60a8948a RS |
768 | line[col] = 0; |
769 | } | |
770 | ||
4588ec20 JB |
771 | /* Mark the lines made empty by scrolling as enabled, empty and |
772 | normal video. */ | |
502b9b64 JB |
773 | bzero (current_frame->used + end + amount, |
774 | - amount * sizeof current_frame->used[0]); | |
775 | bzero (current_frame->highlight + end + amount, | |
776 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
777 | for (i = end + amount; i < end; i++) |
778 | { | |
502b9b64 | 779 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 780 | current_frame->charstarts[i][0] = 0; |
502b9b64 | 781 | current_frame->enable[i] = 1; |
4588ec20 JB |
782 | } |
783 | ||
502b9b64 JB |
784 | safe_bcopy (current_frame->bufp + from, |
785 | current_frame->bufp + from + amount, | |
786 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 | 787 | |
fd2e066a GV |
788 | #ifdef HAVE_WINDOW_SYSTEM |
789 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 790 | { |
502b9b64 JB |
791 | safe_bcopy (current_frame->top_left_x + from, |
792 | current_frame->top_left_x + from + amount, | |
793 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 794 | |
502b9b64 JB |
795 | safe_bcopy (current_frame->top_left_y + from, |
796 | current_frame->top_left_y + from + amount, | |
797 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 798 | |
502b9b64 JB |
799 | safe_bcopy (current_frame->pix_width + from, |
800 | current_frame->pix_width + from + amount, | |
801 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 802 | |
502b9b64 JB |
803 | safe_bcopy (current_frame->pix_height + from, |
804 | current_frame->pix_height + from + amount, | |
805 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
806 | |
807 | safe_bcopy (current_frame->max_ascent + from, | |
808 | current_frame->max_ascent + from + amount, | |
809 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 | 810 | } |
fd2e066a | 811 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 812 | |
502b9b64 | 813 | update_end (frame); |
4588ec20 JB |
814 | } |
815 | return 1; | |
816 | } | |
817 | \f | |
502b9b64 | 818 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 819 | copy all the columns that W does not occupy |
502b9b64 JB |
820 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
821 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
822 | |
823 | preserve_other_columns (w) | |
824 | struct window *w; | |
825 | { | |
826 | register int vpos; | |
502b9b64 JB |
827 | register struct frame_glyphs *current_frame, *desired_frame; |
828 | register FRAME_PTR frame = XFRAME (w->frame); | |
9bfd4456 RS |
829 | int start = WINDOW_LEFT_MARGIN (w); |
830 | int end = WINDOW_RIGHT_EDGE (w); | |
4588ec20 JB |
831 | int bot = XFASTINT (w->top) + XFASTINT (w->height); |
832 | ||
502b9b64 JB |
833 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
834 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
835 | |
836 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
837 | { | |
502b9b64 | 838 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
839 | { |
840 | if (start > 0) | |
841 | { | |
842 | int len; | |
843 | ||
502b9b64 | 844 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 | 845 | desired_frame->glyphs[vpos], |
4b34bd81 | 846 | start * sizeof (current_frame->glyphs[vpos][0])); |
60a8948a RS |
847 | bcopy (current_frame->charstarts[vpos], |
848 | desired_frame->charstarts[vpos], | |
4b34bd81 | 849 | start * sizeof (current_frame->charstarts[vpos][0])); |
502b9b64 JB |
850 | len = min (start, current_frame->used[vpos]); |
851 | if (desired_frame->used[vpos] < len) | |
852 | desired_frame->used[vpos] = len; | |
4588ec20 | 853 | } |
502b9b64 JB |
854 | if (current_frame->used[vpos] > end |
855 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 856 | { |
502b9b64 | 857 | while (desired_frame->used[vpos] < end) |
60a8948a RS |
858 | { |
859 | int used = desired_frame->used[vpos]++; | |
860 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; | |
861 | desired_frame->glyphs[vpos][used] = 0; | |
862 | } | |
502b9b64 JB |
863 | bcopy (current_frame->glyphs[vpos] + end, |
864 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 | 865 | ((current_frame->used[vpos] - end) |
4b34bd81 | 866 | * sizeof (current_frame->glyphs[vpos][0]))); |
60a8948a RS |
867 | bcopy (current_frame->charstarts[vpos] + end, |
868 | desired_frame->charstarts[vpos] + end, | |
869 | ((current_frame->used[vpos] - end) | |
4b34bd81 | 870 | * sizeof (current_frame->charstarts[vpos][0]))); |
502b9b64 | 871 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
872 | } |
873 | } | |
874 | } | |
875 | } | |
876 | \f | |
877 | #if 0 | |
878 | ||
502b9b64 | 879 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 880 | copy all the columns that w does occupy |
502b9b64 JB |
881 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
882 | so that update_frame will not change those columns. | |
4588ec20 JB |
883 | |
884 | Have not been able to figure out how to use this correctly. */ | |
885 | ||
886 | preserve_my_columns (w) | |
887 | struct window *w; | |
888 | { | |
889 | register int vpos, fin; | |
502b9b64 JB |
890 | register struct frame_glyphs *l1, *l2; |
891 | register FRAME_PTR frame = XFRAME (w->frame); | |
9bfd4456 RS |
892 | int start = WINDOW_LEFT_MARGIN (w); |
893 | int end = WINDOW_RIGHT_EDGE (w); | |
4588ec20 JB |
894 | int bot = XFASTINT (w->top) + XFASTINT (w->height); |
895 | ||
896 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
897 | { | |
502b9b64 JB |
898 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
899 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
900 | { |
901 | if (l2->length > start && l1->length < l2->length) | |
902 | { | |
903 | fin = l2->length; | |
904 | if (fin > end) fin = end; | |
905 | while (l1->length < start) | |
906 | l1->body[l1->length++] = ' '; | |
907 | bcopy (l2->body + start, l1->body + start, fin - start); | |
908 | l1->length = fin; | |
909 | } | |
910 | } | |
911 | } | |
912 | } | |
913 | ||
914 | #endif | |
915 | \f | |
b64b3980 | 916 | /* Adjust by ADJUST the charstart values in window W |
23b0200c | 917 | after vpos VPOS, which counts relative to the frame |
b64b3980 RS |
918 | (not relative to W itself). */ |
919 | ||
920 | void | |
921 | adjust_window_charstarts (w, vpos, adjust) | |
922 | struct window *w; | |
923 | int vpos; | |
924 | int adjust; | |
925 | { | |
9bfd4456 | 926 | int left = WINDOW_LEFT_MARGIN (w); |
b64b3980 | 927 | int top = XFASTINT (w->top); |
23b0200c RS |
928 | int right = left + window_internal_width (w); |
929 | int bottom = top + window_internal_height (w); | |
b64b3980 RS |
930 | int i; |
931 | ||
23b0200c | 932 | for (i = vpos + 1; i < bottom; i++) |
b64b3980 RS |
933 | { |
934 | int *charstart | |
935 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; | |
936 | int j; | |
937 | for (j = left; j < right; j++) | |
938 | if (charstart[j] > 0) | |
939 | charstart[j] += adjust; | |
940 | } | |
941 | } | |
23b0200c | 942 | |
352f1545 RS |
943 | /* Check the charstarts values in the area of window W |
944 | for internal consistency. We cannot check that they are "right"; | |
945 | we can only look for something nonsensical. */ | |
946 | ||
23b0200c RS |
947 | verify_charstarts (w) |
948 | struct window *w; | |
949 | { | |
950 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
951 | int i; | |
952 | int top = XFASTINT (w->top); | |
953 | int bottom = top + window_internal_height (w); | |
9bfd4456 | 954 | int left = WINDOW_LEFT_MARGIN (w); |
23b0200c RS |
955 | int right = left + window_internal_width (w); |
956 | int next_line; | |
352f1545 RS |
957 | int truncate = (XINT (w->hscroll) |
958 | || (truncate_partial_width_windows | |
9bfd4456 | 959 | && !WINDOW_FULL_WIDTH_P (w)) |
352f1545 | 960 | || !NILP (XBUFFER (w->buffer)->truncate_lines)); |
23b0200c RS |
961 | |
962 | for (i = top; i < bottom; i++) | |
963 | { | |
964 | int j; | |
965 | int last; | |
352f1545 | 966 | int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; |
23b0200c RS |
967 | |
968 | if (i != top) | |
352f1545 RS |
969 | { |
970 | if (truncate) | |
971 | { | |
972 | /* If we are truncating lines, allow a jump | |
973 | in charstarts from one line to the next. */ | |
974 | if (charstart[left] < next_line) | |
975 | abort (); | |
976 | } | |
977 | else | |
978 | { | |
979 | if (charstart[left] != next_line) | |
980 | abort (); | |
981 | } | |
982 | } | |
23b0200c RS |
983 | |
984 | for (j = left; j < right; j++) | |
985 | if (charstart[j] > 0) | |
986 | last = charstart[j]; | |
2e8907d3 RS |
987 | /* Record where the next line should start. */ |
988 | next_line = last; | |
989 | if (BUF_ZV (XBUFFER (w->buffer)) != last) | |
990 | { | |
991 | /* If there's a newline between the two lines, count that. */ | |
992 | int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); | |
993 | if (endchar == '\n') | |
994 | next_line++; | |
995 | } | |
23b0200c RS |
996 | } |
997 | } | |
b64b3980 | 998 | \f |
4588ec20 JB |
999 | /* On discovering that the redisplay for a window was no good, |
1000 | cancel the columns of that window, so that when the window is | |
1001 | displayed over again get_display_line will not complain. */ | |
1002 | ||
1003 | cancel_my_columns (w) | |
1004 | struct window *w; | |
1005 | { | |
1006 | register int vpos; | |
60a8948a RS |
1007 | register struct frame_glyphs *desired_glyphs |
1008 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
9bfd4456 | 1009 | register int start = WINDOW_LEFT_MARGIN (w); |
4588ec20 JB |
1010 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); |
1011 | ||
1012 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
1013 | if (desired_glyphs->enable[vpos] | |
1014 | && desired_glyphs->used[vpos] >= start) | |
1015 | desired_glyphs->used[vpos] = start; | |
1016 | } | |
1017 | \f | |
502b9b64 | 1018 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
1019 | the necessary output for one change in the buffer. |
1020 | They may return 0 meaning nothing was done if anything is difficult, | |
1021 | or 1 meaning the output was performed properly. | |
502b9b64 | 1022 | They assume that the frame was up to date before the buffer |
94aa5d2d | 1023 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
1024 | see command_loop_1 where these are called. */ |
1025 | ||
1026 | int | |
1027 | direct_output_for_insert (g) | |
1028 | int g; | |
1029 | { | |
502b9b64 JB |
1030 | register FRAME_PTR frame = selected_frame; |
1031 | register struct frame_glyphs *current_frame | |
1032 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
1033 | |
1034 | #ifndef COMPILER_REGISTER_BUG | |
1035 | register | |
1036 | #endif /* COMPILER_REGISTER_BUG */ | |
1037 | struct window *w = XWINDOW (selected_window); | |
1038 | #ifndef COMPILER_REGISTER_BUG | |
1039 | register | |
1040 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1041 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
1042 | #ifndef COMPILER_REGISTER_BUG |
1043 | register | |
1044 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1045 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 1046 | |
fa61c701 | 1047 | /* Give up if about to continue line. */ |
9bfd4456 | 1048 | if (hpos >= WINDOW_LEFT_MARGIN (w) + window_internal_width (w) - 1 |
fa61c701 | 1049 | |
4588ec20 | 1050 | /* Avoid losing if cursor is in invisible text off left margin */ |
9bfd4456 | 1051 | || (XINT (w->hscroll) && hpos == WINDOW_LEFT_MARGIN (w)) |
4588ec20 JB |
1052 | |
1053 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 1054 | || cursor_in_echo_area |
502b9b64 JB |
1055 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
1056 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 1057 | |
502b9b64 | 1058 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
1059 | || !display_completed |
1060 | ||
1061 | /* Give up if buffer appears in two places. */ | |
1062 | || buffer_shared > 1 | |
1063 | ||
d169fe39 RS |
1064 | #ifdef USE_TEXT_PROPERTIES |
1065 | /* Intervals have already been adjusted, point is after the | |
1066 | character that was just inserted. */ | |
ef4d2f9e | 1067 | /* Give up if character is invisible. */ |
d169fe39 RS |
1068 | /* Give up if character has a face property. |
1069 | At the moment we only lose at end of line or end of buffer | |
1070 | and only with faces that have some background */ | |
1071 | /* Instead of wasting time, give up if character has any text properties */ | |
6ec8bbd2 | 1072 | || ! NILP (Ftext_properties_at (make_number (PT - 1), Qnil)) |
d169fe39 RS |
1073 | #endif |
1074 | ||
4588ec20 JB |
1075 | /* Give up if w is minibuffer and a message is being displayed there */ |
1076 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
1077 | return 0; | |
1078 | ||
517b2e01 | 1079 | { |
19dff8dc | 1080 | int face = 0; |
87485d6f | 1081 | #ifdef HAVE_FACES |
517b2e01 | 1082 | int dummy; |
19dff8dc | 1083 | |
93e54836 | 1084 | if (FRAME_WINDOW_P (frame) || FRAME_MSDOS_P (frame)) |
6ec8bbd2 | 1085 | face = compute_char_face (frame, w, PT - 1, -1, -1, &dummy, PT, 0); |
517b2e01 | 1086 | #endif |
a1c3de84 | 1087 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
6ec8bbd2 | 1088 | current_frame->charstarts[vpos][hpos] = PT - 1; |
839c7dfb | 1089 | /* Record the entry for after the newly inserted character. */ |
6ec8bbd2 | 1090 | current_frame->charstarts[vpos][hpos + 1] = PT; |
b64b3980 | 1091 | adjust_window_charstarts (w, vpos, 1); |
517b2e01 | 1092 | } |
4588ec20 JB |
1093 | unchanged_modified = MODIFF; |
1094 | beg_unchanged = GPT - BEG; | |
6ec8bbd2 | 1095 | XSETFASTINT (w->last_point, PT); |
a5d8b611 KH |
1096 | XSETFASTINT (w->last_point_x, hpos); |
1097 | XSETFASTINT (w->last_modified, MODIFF); | |
663b3df3 | 1098 | XSETFASTINT (w->last_overlay_modified, OVERLAY_MODIFF); |
4588ec20 JB |
1099 | |
1100 | reassert_line_highlight (0, vpos); | |
502b9b64 | 1101 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 1102 | fflush (stdout); |
502b9b64 JB |
1103 | ++FRAME_CURSOR_X (frame); |
1104 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 1105 | { |
502b9b64 JB |
1106 | current_frame->used[vpos] = hpos + 1; |
1107 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
1108 | } |
1109 | ||
1110 | return 1; | |
1111 | } | |
1112 | ||
1113 | int | |
1114 | direct_output_forward_char (n) | |
1115 | int n; | |
1116 | { | |
502b9b64 | 1117 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 1118 | register struct window *w = XWINDOW (selected_window); |
254277e1 | 1119 | Lisp_Object position; |
24e86043 KH |
1120 | /* This check is redundant. It's checked at "losing cursor" below. */ |
1121 | #if 0 | |
ea0d86af RS |
1122 | int hpos = FRAME_CURSOR_X (frame); |
1123 | ||
1124 | /* Give up if in truncated text at end of line. */ | |
9bfd4456 | 1125 | if (hpos >= WINDOW_LEFT_MARGIN (w) + window_internal_width (w) - 1) |
ea0d86af | 1126 | return 0; |
24e86043 KH |
1127 | #endif /* 0 */ |
1128 | ||
1129 | /* Give up if the buffer's direction is reversed (i.e. right-to-left). */ | |
1130 | if (!NILP (XBUFFER(w->buffer)->direction_reversed)) | |
1131 | return 0; | |
ea0d86af | 1132 | |
a9764248 JB |
1133 | /* Avoid losing if cursor is in invisible text off left margin |
1134 | or about to go off either side of window. */ | |
9bfd4456 | 1135 | if ((FRAME_CURSOR_X (frame) == WINDOW_LEFT_MARGIN (w) |
a9764248 JB |
1136 | && (XINT (w->hscroll) || n < 0)) |
1137 | || (n > 0 | |
24e86043 KH |
1138 | && (FRAME_CURSOR_X (frame) + 1 |
1139 | >= XFASTINT (w->left) + window_internal_width (w) - 1)) | |
1140 | /* BUG FIX: Added "XFASTINT (w->left)". Without this, | |
1141 | direct_output_forward_char() always fails on "the right" | |
1142 | window. */ | |
648fa17d | 1143 | || cursor_in_echo_area) |
4588ec20 | 1144 | return 0; |
15874c59 | 1145 | |
de83c314 RS |
1146 | /* Can't use direct output if highlighting a region. */ |
1147 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1148 | return 0; | |
1149 | ||
15874c59 KH |
1150 | /* Can't use direct output at an overlay boundary; it might have |
1151 | before-string or after-string properties. */ | |
1152 | if (overlay_touches_p (PT) || overlay_touches_p (PT - n)) | |
1153 | return 0; | |
1154 | ||
d169fe39 RS |
1155 | #ifdef USE_TEXT_PROPERTIES |
1156 | /* Don't use direct output next to an invisible character | |
1157 | since we might need to do something special. */ | |
1158 | ||
6ec8bbd2 | 1159 | XSETFASTINT (position, PT); |
2f24f5ac | 1160 | if (XFASTINT (position) < ZV |
294634fb | 1161 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1162 | Qinvisible, |
294634fb KH |
1163 | selected_window))) |
1164 | return 0; | |
d169fe39 | 1165 | |
6ec8bbd2 | 1166 | XSETFASTINT (position, PT - 1); |
2f24f5ac | 1167 | if (XFASTINT (position) >= BEGV |
294634fb | 1168 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1169 | Qinvisible, |
294634fb KH |
1170 | selected_window))) |
1171 | return 0; | |
d169fe39 RS |
1172 | #endif |
1173 | ||
502b9b64 | 1174 | FRAME_CURSOR_X (frame) += n; |
a5d8b611 | 1175 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (frame)); |
6ec8bbd2 | 1176 | XSETFASTINT (w->last_point, PT); |
502b9b64 | 1177 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 1178 | fflush (stdout); |
d169fe39 | 1179 | |
4588ec20 JB |
1180 | return 1; |
1181 | } | |
1182 | \f | |
1183 | static void update_line (); | |
1184 | ||
502b9b64 | 1185 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
1186 | Value is nonzero if redisplay stopped due to pending input. |
1187 | FORCE nonzero means do not stop for pending input. */ | |
1188 | ||
1189 | int | |
502b9b64 JB |
1190 | update_frame (f, force, inhibit_hairy_id) |
1191 | FRAME_PTR f; | |
4588ec20 JB |
1192 | int force; |
1193 | int inhibit_hairy_id; | |
1194 | { | |
54633da0 | 1195 | register struct frame_glyphs *current_frame; |
7098a0fa | 1196 | register struct frame_glyphs *desired_frame = 0; |
4588ec20 JB |
1197 | register int i; |
1198 | int pause; | |
1199 | int preempt_count = baud_rate / 2400 + 1; | |
1200 | extern input_pending; | |
fd2e066a | 1201 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 JB |
1202 | register int downto, leftmost; |
1203 | #endif | |
1204 | ||
c37e4889 RS |
1205 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
1206 | calculate_costs (f); | |
1207 | ||
d88c2b9e RS |
1208 | if (preempt_count <= 0) |
1209 | preempt_count = 1; | |
1210 | ||
502b9b64 | 1211 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1212 | |
1213 | detect_input_pending (); | |
1214 | if (input_pending && !force) | |
1215 | { | |
1216 | pause = 1; | |
1217 | goto do_pause; | |
1218 | } | |
1219 | ||
502b9b64 | 1220 | update_begin (f); |
4588ec20 JB |
1221 | |
1222 | if (!line_ins_del_ok) | |
1223 | inhibit_hairy_id = 1; | |
1224 | ||
7098a0fa RS |
1225 | /* These are separate to avoid a possible bug in the AIX C compiler. */ |
1226 | current_frame = FRAME_CURRENT_GLYPHS (f); | |
1227 | desired_frame = FRAME_DESIRED_GLYPHS (f); | |
1228 | ||
efb859b4 JB |
1229 | /* See if any of the desired lines are enabled; don't compute for |
1230 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1231 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1232 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1233 | break; |
1234 | ||
1235 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1236 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1237 | force |= scrolling (f); | |
4588ec20 JB |
1238 | |
1239 | /* Update the individual lines as needed. Do bottom line first. */ | |
1240 | ||
502b9b64 JB |
1241 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1242 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 | 1243 | |
fd2e066a GV |
1244 | #ifdef HAVE_WINDOW_SYSTEM |
1245 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 1246 | { |
fd2e066a | 1247 | leftmost = downto = FRAME_INTERNAL_BORDER_WIDTH (f); |
502b9b64 | 1248 | if (desired_frame->enable[0]) |
4588ec20 | 1249 | { |
502b9b64 JB |
1250 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1251 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
fd2e066a | 1252 | = PIXEL_HEIGHT (f) - FRAME_INTERNAL_BORDER_WIDTH (f) |
448fd7c0 | 1253 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1254 | current_frame->top_left_x[0] = leftmost; |
1255 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1256 | } |
1257 | } | |
fd2e066a | 1258 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
1259 | |
1260 | /* Now update the rest of the lines. */ | |
502b9b64 | 1261 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1262 | { |
502b9b64 | 1263 | if (desired_frame->enable[i]) |
4588ec20 | 1264 | { |
b6a65ac2 | 1265 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1266 | { |
1267 | /* Flush out every so many lines. | |
1268 | Also flush out if likely to have more than 1k buffered | |
1269 | otherwise. I'm told that some telnet connections get | |
1270 | really screwed by more than 1k output at once. */ | |
1271 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1272 | if (outq > 900 | |
1273 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1274 | { | |
1275 | fflush (stdout); | |
1276 | if (preempt_count == 1) | |
1277 | { | |
a41f8bed JB |
1278 | #ifdef EMACS_OUTQSIZE |
1279 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1280 | /* Probably not a tty. Ignore the error and reset |
1281 | * the outq count. */ | |
1282 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1283 | #endif | |
1284 | outq *= 10; | |
d520f0d2 | 1285 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 1286 | sleep (outq / baud_rate); |
4588ec20 JB |
1287 | } |
1288 | } | |
4588ec20 JB |
1289 | } |
1290 | ||
a2960116 RS |
1291 | if ((i - 1) % preempt_count == 0) |
1292 | detect_input_pending (); | |
1293 | ||
502b9b64 | 1294 | update_line (f, i); |
fd2e066a GV |
1295 | #ifdef HAVE_WINDOW_SYSTEM |
1296 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 1297 | { |
502b9b64 JB |
1298 | current_frame->top_left_y[i] = downto; |
1299 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 | 1300 | } |
fd2e066a | 1301 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
1302 | } |
1303 | ||
fd2e066a GV |
1304 | #ifdef HAVE_WINDOW_SYSTEM |
1305 | if (FRAME_WINDOW_P (f)) | |
448fd7c0 | 1306 | downto += current_frame->pix_height[i]; |
fd2e066a | 1307 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 1308 | } |
502b9b64 | 1309 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1310 | |
1311 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1312 | if (!pause) | |
1313 | { | |
48cf7030 | 1314 | if ((cursor_in_echo_area |
2577053b RS |
1315 | /* If we are showing a message instead of the minibuffer, |
1316 | show the cursor for the message instead of for the | |
1317 | (now hidden) minibuffer contents. */ | |
1318 | || (EQ (minibuf_window, selected_window) | |
1319 | && EQ (minibuf_window, echo_area_window) | |
1320 | && echo_area_glyphs != 0)) | |
1321 | /* These cases apply only to the frame that contains | |
1322 | the active minibuffer window. */ | |
1323 | && FRAME_HAS_MINIBUF_P (f) | |
140f8645 | 1324 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 1325 | { |
648fa17d JB |
1326 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1327 | int row, col; | |
1328 | ||
1329 | if (cursor_in_echo_area < 0) | |
1330 | { | |
1331 | row = top; | |
1332 | col = 0; | |
1333 | } | |
1113d9db | 1334 | else |
648fa17d JB |
1335 | { |
1336 | /* If the minibuffer is several lines high, find the last | |
1337 | line that has any text on it. */ | |
1338 | row = FRAME_HEIGHT (f); | |
1339 | do | |
1340 | { | |
1341 | row--; | |
1342 | if (current_frame->enable[row]) | |
1343 | col = current_frame->used[row]; | |
1344 | else | |
1345 | col = 0; | |
1346 | } | |
1347 | while (row > top && col == 0); | |
1348 | ||
29ec5d84 | 1349 | if (col >= FRAME_WINDOW_WIDTH (f)) |
648fa17d JB |
1350 | { |
1351 | col = 0; | |
1352 | if (row < FRAME_HEIGHT (f) - 1) | |
1353 | row++; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | cursor_to (row, col); | |
1113d9db | 1358 | } |
4588ec20 | 1359 | else |
9bfd4456 RS |
1360 | cursor_to (FRAME_CURSOR_Y (f), |
1361 | max (min (FRAME_CURSOR_X (f), | |
1362 | FRAME_WINDOW_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1363 | } |
1364 | ||
502b9b64 | 1365 | update_end (f); |
4588ec20 JB |
1366 | |
1367 | if (termscript) | |
1368 | fflush (termscript); | |
1369 | fflush (stdout); | |
1370 | ||
1371 | /* Here if output is preempted because input is detected. */ | |
1372 | do_pause: | |
1373 | ||
502b9b64 | 1374 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1375 | display_completed = !pause; |
1376 | ||
f5843453 | 1377 | bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1378 | return pause; |
1379 | } | |
1380 | ||
1381 | /* Called when about to quit, to check for doing so | |
1382 | at an improper time. */ | |
1383 | ||
1384 | void | |
1385 | quit_error_check () | |
1386 | { | |
1c78509b | 1387 | #if 0 |
502b9b64 | 1388 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1389 | return; |
502b9b64 | 1390 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1391 | abort (); |
502b9b64 | 1392 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 | 1393 | abort (); |
1c78509b | 1394 | #endif |
4588ec20 JB |
1395 | } |
1396 | \f | |
1397 | /* Decide what insert/delete line to do, and do it */ | |
1398 | ||
1399 | extern void scrolling_1 (); | |
1400 | ||
502b9b64 JB |
1401 | scrolling (frame) |
1402 | FRAME_PTR frame; | |
4588ec20 JB |
1403 | { |
1404 | int unchanged_at_top, unchanged_at_bottom; | |
1405 | int window_size; | |
1406 | int changed_lines; | |
502b9b64 JB |
1407 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1408 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1409 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
190bb91a | 1410 | int *old_draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
4588ec20 | 1411 | register int i; |
502b9b64 JB |
1412 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1413 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1414 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1415 | |
1416 | /* Compute hash codes of all the lines. | |
1417 | Also calculate number of changed lines, | |
1418 | number of unchanged lines at the beginning, | |
1419 | and number of unchanged lines at the end. */ | |
1420 | ||
1421 | changed_lines = 0; | |
1422 | unchanged_at_top = 0; | |
502b9b64 JB |
1423 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1424 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1425 | { |
1426 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1427 | if (!current_frame->enable[i]) |
4588ec20 | 1428 | return 0; |
502b9b64 JB |
1429 | old_hash[i] = line_hash_code (current_frame, i); |
1430 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1431 | new_hash[i] = old_hash[i]; |
1432 | else | |
502b9b64 | 1433 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1434 | |
1435 | if (old_hash[i] != new_hash[i]) | |
1436 | { | |
1437 | changed_lines++; | |
502b9b64 | 1438 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1439 | } |
1440 | else if (i == unchanged_at_top) | |
1441 | unchanged_at_top++; | |
502b9b64 | 1442 | draw_cost[i] = line_draw_cost (desired_frame, i); |
190bb91a | 1443 | old_draw_cost[i] = line_draw_cost (current_frame, i); |
4588ec20 JB |
1444 | } |
1445 | ||
1446 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
190bb91a | 1447 | if (!scroll_region_ok && changed_lines < baud_rate / 2400 |
502b9b64 | 1448 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1449 | return 1; |
1450 | ||
502b9b64 | 1451 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1452 | - unchanged_at_bottom); |
1453 | ||
1454 | if (scroll_region_ok) | |
1455 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1456 | else if (memory_below_frame) |
4588ec20 JB |
1457 | free_at_end_vpos = -1; |
1458 | ||
1459 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1460 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 1461 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
1462 | && (window_size >= |
1463 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1464 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1465 | old_hash, new_hash, draw_cost))) |
1466 | return 0; | |
1467 | ||
502b9b64 | 1468 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 1469 | draw_cost + unchanged_at_top - 1, |
190bb91a | 1470 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
1471 | old_hash + unchanged_at_top - 1, |
1472 | new_hash + unchanged_at_top - 1, | |
1473 | free_at_end_vpos - unchanged_at_top); | |
1474 | ||
1475 | return 0; | |
1476 | } | |
1477 | \f | |
1478 | /* Return the offset in its buffer of the character at location col, line | |
1479 | in the given window. */ | |
1480 | int | |
1481 | buffer_posn_from_coords (window, col, line) | |
1482 | struct window *window; | |
1483 | int col, line; | |
1484 | { | |
ef0fdbb1 | 1485 | int hscroll = XINT (window->hscroll); |
9bfd4456 | 1486 | int window_left = WINDOW_LEFT_MARGIN (window); |
4588ec20 JB |
1487 | |
1488 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1489 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1490 | window. */ | |
fa61c701 | 1491 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1492 | |
efb859b4 | 1493 | int startp = marker_position (window->start); |
4588ec20 JB |
1494 | |
1495 | /* Since compute_motion will only operate on the current buffer, | |
1496 | we need to save the old one and restore it when we're done. */ | |
1497 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1498 | struct position *posn; |
4588ec20 JB |
1499 | |
1500 | current_buffer = XBUFFER (window->buffer); | |
1501 | ||
2ba9ed58 KH |
1502 | /* We can't get a correct result in this case, |
1503 | but at least prevent compute_motion from crashing. */ | |
1504 | if (startp < BEGV) | |
1505 | startp = BEGV; | |
1506 | ||
502b9b64 JB |
1507 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1508 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1509 | the window, but it isn't maintained correctly, and I'm not even |
1510 | sure I will keep it. */ | |
1511 | posn = compute_motion (startp, 0, | |
94129385 KH |
1512 | ((window == XWINDOW (minibuf_window) && startp == BEG |
1513 | ? minibuf_prompt_width : 0) | |
1514 | + (hscroll ? 1 - hscroll : 0)), | |
1515 | 0, | |
fb0f454a | 1516 | ZV, line, col, |
e37f06d7 | 1517 | window_width, hscroll, 0, window); |
4588ec20 JB |
1518 | |
1519 | current_buffer = old_current_buffer; | |
1520 | ||
502b9b64 | 1521 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1522 | to be *after* the newline, i.e. at the start of the next line. |
1523 | This is reasonable, but not really what we want. So if the | |
1524 | result is on a line below LINE, back it up one character. */ | |
1525 | if (posn->vpos > line) | |
1526 | return posn->bufpos - 1; | |
1527 | else | |
1528 | return posn->bufpos; | |
4588ec20 JB |
1529 | } |
1530 | \f | |
1531 | static int | |
1532 | count_blanks (r) | |
1533 | register GLYPH *r; | |
1534 | { | |
1535 | register GLYPH *p = r; | |
94aa5d2d RS |
1536 | while (*p++ == SPACEGLYPH); |
1537 | return p - r - 1; | |
4588ec20 JB |
1538 | } |
1539 | ||
1540 | static int | |
1541 | count_match (str1, str2) | |
1542 | GLYPH *str1, *str2; | |
1543 | { | |
1544 | register GLYPH *p1 = str1; | |
1545 | register GLYPH *p2 = str2; | |
1546 | while (*p1++ == *p2++); | |
1547 | return p1 - str1 - 1; | |
1548 | } | |
1549 | ||
1550 | /* Char insertion/deletion cost vector, from term.c */ | |
1551 | extern int *char_ins_del_vector; | |
1552 | ||
29ec5d84 | 1553 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))]) |
4588ec20 JB |
1554 | |
1555 | static void | |
502b9b64 JB |
1556 | update_line (frame, vpos) |
1557 | register FRAME_PTR frame; | |
4588ec20 JB |
1558 | int vpos; |
1559 | { | |
1560 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
60a8948a | 1561 | int *temp1; |
4588ec20 JB |
1562 | int tem; |
1563 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
24e86043 | 1564 | GLYPH save; |
502b9b64 JB |
1565 | register struct frame_glyphs *current_frame |
1566 | = FRAME_CURRENT_GLYPHS (frame); | |
1567 | register struct frame_glyphs *desired_frame | |
1568 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1569 | |
502b9b64 JB |
1570 | if (desired_frame->highlight[vpos] |
1571 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1572 | { |
502b9b64 JB |
1573 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1574 | (current_frame->enable[vpos] ? | |
1575 | current_frame->used[vpos] : 0)); | |
1576 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1577 | } |
1578 | else | |
502b9b64 | 1579 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1580 | |
502b9b64 | 1581 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1582 | { |
1583 | olen = 0; | |
1584 | } | |
1585 | else | |
1586 | { | |
502b9b64 JB |
1587 | obody = current_frame->glyphs[vpos]; |
1588 | olen = current_frame->used[vpos]; | |
1589 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1590 | { |
1591 | if (!must_write_spaces) | |
ed874011 | 1592 | while (olen > 0 && obody[olen - 1] == SPACEGLYPH) |
4588ec20 JB |
1593 | olen--; |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1598 | spaces all the way to the frame edge |
4588ec20 JB |
1599 | so that the reverse video extends all the way across. */ |
1600 | ||
29ec5d84 | 1601 | while (olen < FRAME_WINDOW_WIDTH (frame) - 1) |
4588ec20 JB |
1602 | obody[olen++] = SPACEGLYPH; |
1603 | } | |
1604 | } | |
1605 | ||
1606 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1607 | current_frame->enable[vpos] = 1; |
1608 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1609 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1610 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 | 1611 | |
fd2e066a GV |
1612 | #ifdef HAVE_WINDOW_SYSTEM |
1613 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 1614 | { |
502b9b64 JB |
1615 | current_frame->pix_width[vpos] |
1616 | = current_frame->used[vpos] | |
fd2e066a | 1617 | * FONT_WIDTH (FRAME_FONT (frame)); |
502b9b64 | 1618 | current_frame->pix_height[vpos] |
fd2e066a | 1619 | = FRAME_LINE_HEIGHT (frame); |
4588ec20 | 1620 | } |
fd2e066a | 1621 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 1622 | |
502b9b64 | 1623 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1624 | { |
1625 | nlen = 0; | |
1626 | goto just_erase; | |
1627 | } | |
1628 | ||
502b9b64 JB |
1629 | nbody = desired_frame->glyphs[vpos]; |
1630 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1631 | |
1632 | /* Pretend trailing spaces are not there at all, | |
1633 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1634 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1635 | { |
1636 | if (!must_write_spaces) | |
1637 | /* We know that the previous character byte contains 0. */ | |
1638 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1639 | nlen--; | |
1640 | } | |
1641 | else | |
1642 | { | |
1643 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1644 | all the way to the frame edge |
4588ec20 JB |
1645 | so that the reverse video extends all the way across. */ |
1646 | ||
29ec5d84 | 1647 | while (nlen < FRAME_WINDOW_WIDTH (frame) - 1) |
4588ec20 JB |
1648 | nbody[nlen++] = SPACEGLYPH; |
1649 | } | |
1650 | ||
1651 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1652 | if (!char_ins_del_ok) | |
1653 | { | |
1654 | int i,j; | |
1655 | ||
76426794 RS |
1656 | #if 0 |
1657 | if (FRAME_X_P (frame)) | |
1658 | { | |
1659 | /* Under X, erase everything we are going to rewrite, | |
1660 | and rewrite everything from the first char that's changed. | |
1661 | This is part of supporting fonts like Courier | |
1662 | whose chars can overlap outside the char width. */ | |
1663 | for (i = 0; i < nlen; i++) | |
1664 | if (i >= olen || nbody[i] != obody[i]) | |
1665 | break; | |
1666 | ||
1667 | cursor_to (vpos, i); | |
1668 | if (i != olen) | |
1669 | clear_end_of_line (olen); | |
1670 | write_glyphs (nbody + i, nlen - i); | |
1671 | } | |
1672 | else | |
1673 | {} | |
1674 | #endif /* 0 */ | |
4588ec20 JB |
1675 | for (i = 0; i < nlen; i++) |
1676 | { | |
1677 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1678 | { | |
1679 | cursor_to (vpos, i); | |
24e86043 KH |
1680 | for (j = 1; |
1681 | (i + j < nlen | |
1682 | && (i + j >= olen || nbody[i + j] != obody[i + j] | |
1683 | || (nbody[i + j] & GLYPH_MASK_PADDING))); | |
4588ec20 JB |
1684 | j++); |
1685 | ||
1686 | /* Output this run of non-matching chars. */ | |
1687 | write_glyphs (nbody + i, j); | |
1688 | i += j - 1; | |
1689 | ||
1690 | /* Now find the next non-match. */ | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1695 | if (olen > nlen) | |
1696 | { | |
1697 | cursor_to (vpos, nlen); | |
1698 | clear_end_of_line (olen); | |
1699 | } | |
1700 | ||
502b9b64 JB |
1701 | /* Exchange contents between current_frame and new_frame. */ |
1702 | temp = desired_frame->glyphs[vpos]; | |
1703 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1704 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1705 | |
60a8948a RS |
1706 | /* Exchange charstarts between current_frame and new_frame. */ |
1707 | temp1 = desired_frame->charstarts[vpos]; | |
1708 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1709 | current_frame->charstarts[vpos] = temp1; | |
1710 | ||
4588ec20 JB |
1711 | return; |
1712 | } | |
1713 | ||
1714 | if (!olen) | |
1715 | { | |
502b9b64 | 1716 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1717 | ? 0 : count_blanks (nbody); |
1718 | if (nlen > nsp) | |
1719 | { | |
1720 | cursor_to (vpos, nsp); | |
1721 | write_glyphs (nbody + nsp, nlen - nsp); | |
1722 | } | |
1723 | ||
502b9b64 JB |
1724 | /* Exchange contents between current_frame and new_frame. */ |
1725 | temp = desired_frame->glyphs[vpos]; | |
1726 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1727 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1728 | |
60a8948a RS |
1729 | /* Exchange charstarts between current_frame and new_frame. */ |
1730 | temp1 = desired_frame->charstarts[vpos]; | |
1731 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1732 | current_frame->charstarts[vpos] = temp1; | |
1733 | ||
4588ec20 JB |
1734 | return; |
1735 | } | |
1736 | ||
1737 | obody[olen] = 1; | |
1738 | save = nbody[nlen]; | |
1739 | nbody[nlen] = 0; | |
1740 | ||
1741 | /* Compute number of leading blanks in old and new contents. */ | |
1742 | osp = count_blanks (obody); | |
502b9b64 | 1743 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1744 | nsp = count_blanks (nbody); |
1745 | else | |
1746 | nsp = 0; | |
1747 | ||
1748 | /* Compute number of matching chars starting with first nonblank. */ | |
1749 | begmatch = count_match (obody + osp, nbody + nsp); | |
1750 | ||
1751 | /* Spaces in new match implicit space past the end of old. */ | |
1752 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1753 | if (!must_write_spaces && osp + begmatch == olen) | |
1754 | { | |
1755 | np1 = nbody + nsp; | |
1756 | while (np1[begmatch] == SPACEGLYPH) | |
1757 | begmatch++; | |
1758 | } | |
1759 | ||
1760 | /* Avoid doing insert/delete char | |
1761 | just cause number of leading spaces differs | |
1762 | when the following text does not match. */ | |
1763 | if (begmatch == 0 && osp != nsp) | |
1764 | osp = nsp = min (osp, nsp); | |
1765 | ||
1766 | /* Find matching characters at end of line */ | |
1767 | op1 = obody + olen; | |
1768 | np1 = nbody + nlen; | |
1769 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1770 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1771 | { | |
1772 | op1--; | |
1773 | np1--; | |
1774 | } | |
1775 | endmatch = obody + olen - op1; | |
1776 | ||
1777 | /* Put correct value back in nbody[nlen]. | |
1778 | This is important because direct_output_for_insert | |
1779 | can write into the line at a later point. | |
1780 | If this screws up the zero at the end of the line, re-establish it. */ | |
1781 | nbody[nlen] = save; | |
1782 | obody[olen] = 0; | |
1783 | ||
1784 | /* tem gets the distance to insert or delete. | |
1785 | endmatch is how many characters we save by doing so. | |
1786 | Is it worth it? */ | |
1787 | ||
1788 | tem = (nlen - nsp) - (olen - osp); | |
1789 | if (endmatch && tem | |
502b9b64 | 1790 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1791 | endmatch = 0; |
1792 | ||
1793 | /* nsp - osp is the distance to insert or delete. | |
1794 | If that is nonzero, begmatch is known to be nonzero also. | |
1795 | begmatch + endmatch is how much we save by doing the ins/del. | |
1796 | Is it worth it? */ | |
1797 | ||
1798 | if (nsp != osp | |
1799 | && (!char_ins_del_ok | |
502b9b64 | 1800 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1801 | { |
1802 | begmatch = 0; | |
1803 | endmatch = 0; | |
1804 | osp = nsp = min (osp, nsp); | |
1805 | } | |
1806 | ||
1807 | /* Now go through the line, inserting, writing and | |
1808 | deleting as appropriate. */ | |
1809 | ||
1810 | if (osp > nsp) | |
1811 | { | |
1812 | cursor_to (vpos, nsp); | |
1813 | delete_glyphs (osp - nsp); | |
1814 | } | |
1815 | else if (nsp > osp) | |
1816 | { | |
1817 | /* If going to delete chars later in line | |
1818 | and insert earlier in the line, | |
1819 | must delete first to avoid losing data in the insert */ | |
1820 | if (endmatch && nlen < olen + nsp - osp) | |
1821 | { | |
1822 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1823 | delete_glyphs (olen + nsp - osp - nlen); | |
1824 | olen = nlen - (nsp - osp); | |
1825 | } | |
1826 | cursor_to (vpos, osp); | |
1827 | insert_glyphs ((char *)0, nsp - osp); | |
1828 | } | |
1829 | olen += nsp - osp; | |
1830 | ||
1831 | tem = nsp + begmatch + endmatch; | |
1832 | if (nlen != tem || olen != tem) | |
1833 | { | |
1834 | cursor_to (vpos, nsp + begmatch); | |
1835 | if (!endmatch || nlen == olen) | |
1836 | { | |
1837 | /* If new text being written reaches right margin, | |
1838 | there is no need to do clear-to-eol at the end. | |
1839 | (and it would not be safe, since cursor is not | |
1840 | going to be "at the margin" after the text is done) */ | |
29ec5d84 | 1841 | if (nlen == FRAME_WINDOW_WIDTH (frame)) |
4588ec20 JB |
1842 | olen = 0; |
1843 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1844 | ||
1845 | #ifdef obsolete | |
1846 | ||
1847 | /* the following code loses disastrously if tem == nlen. | |
1848 | Rather than trying to fix that case, I am trying the simpler | |
1849 | solution found above. */ | |
1850 | ||
1851 | /* If the text reaches to the right margin, | |
1852 | it will lose one way or another (depending on AutoWrap) | |
1853 | to clear to end of line after outputting all the text. | |
1854 | So pause with one character to go and clear the line then. */ | |
29ec5d84 | 1855 | if (nlen == FRAME_WINDOW_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1856 | { |
1857 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1858 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1859 | clear_end_of_line (olen); | |
1860 | olen = 0; /* Don't let it be cleared again later */ | |
1861 | write_glyphs (nbody + nlen - 1, 1); | |
1862 | } | |
1863 | else | |
1864 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1865 | #endif /* OBSOLETE */ | |
1866 | ||
1867 | } | |
1868 | else if (nlen > olen) | |
1869 | { | |
24e86043 KH |
1870 | /* Here, we used to have the following simple code: |
1871 | ---------------------------------------- | |
1872 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1873 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1874 | ---------------------------------------- | |
1875 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
1876 | is a padding glyph. */ | |
1877 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
1878 | int del; | |
1879 | ||
1880 | /* Calculate columns we can actually overwrite. */ | |
1881 | while (nbody[nsp + begmatch + out] & GLYPH_MASK_PADDING) out--; | |
1882 | write_glyphs (nbody + nsp + begmatch, out); | |
1883 | /* If we left columns to be overwritten. we must delete them. */ | |
1884 | del = olen - tem - out; | |
1885 | if (del > 0) delete_glyphs (del); | |
1886 | /* At last, we insert columns not yet written out. */ | |
1887 | insert_glyphs (nbody + nsp + begmatch + out, nlen - olen + del); | |
4588ec20 JB |
1888 | olen = nlen; |
1889 | } | |
1890 | else if (olen > nlen) | |
1891 | { | |
1892 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1893 | delete_glyphs (olen - nlen); | |
1894 | olen = nlen; | |
1895 | } | |
1896 | } | |
1897 | ||
1898 | just_erase: | |
1899 | /* If any unerased characters remain after the new line, erase them. */ | |
1900 | if (olen > nlen) | |
1901 | { | |
1902 | cursor_to (vpos, nlen); | |
1903 | clear_end_of_line (olen); | |
1904 | } | |
1905 | ||
502b9b64 JB |
1906 | /* Exchange contents between current_frame and new_frame. */ |
1907 | temp = desired_frame->glyphs[vpos]; | |
1908 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1909 | current_frame->glyphs[vpos] = temp; | |
60a8948a RS |
1910 | |
1911 | /* Exchange charstarts between current_frame and new_frame. */ | |
1912 | temp1 = desired_frame->charstarts[vpos]; | |
1913 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1914 | current_frame->charstarts[vpos] = temp1; | |
4588ec20 JB |
1915 | } |
1916 | \f | |
6f7bbf79 KH |
1917 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the |
1918 | session's frames, frame names, buffers, buffer-read-only flags, and | |
1919 | buffer-modified-flags, and a trailing sentinel (so we don't need to | |
1920 | add length checks). */ | |
078b3696 KH |
1921 | static Lisp_Object frame_and_buffer_state; |
1922 | ||
1923 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
1924 | Sframe_or_buffer_changed_p, 0, 0, 0, | |
1925 | "Return non-nil if the frame and buffer state appears to have changed.\n\ | |
1926 | The state variable is an internal vector containing all frames and buffers,\n\ | |
836d2cde | 1927 | aside from buffers whose names start with space,\n\ |
078b3696 KH |
1928 | along with the buffers' read-only and modified flags, which allows a fast\n\ |
1929 | check to see whether the menu bars might need to be recomputed.\n\ | |
1930 | If this function returns non-nil, it updates the internal vector to reflect\n\ | |
1931 | the current state.\n") | |
1932 | () | |
1933 | { | |
1934 | Lisp_Object tail, frame, buf; | |
1935 | Lisp_Object *vecp; | |
1936 | int n; | |
bd9e3e75 | 1937 | |
078b3696 KH |
1938 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1939 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1940 | { |
1941 | if (!EQ (*vecp++, frame)) | |
1942 | goto changed; | |
1943 | if (!EQ (*vecp++, XFRAME (frame)->name)) | |
1944 | goto changed; | |
1945 | } | |
50cf83f8 RS |
1946 | /* Check that the buffer info matches. |
1947 | No need to test for the end of the vector | |
1948 | because the last element of the vector is lambda | |
1949 | and that will always cause a mismatch. */ | |
078b3696 KH |
1950 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1951 | { | |
1952 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1953 | /* Ignore buffers that aren't included in buffer lists. */ |
1954 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1955 | continue; | |
078b3696 KH |
1956 | if (!EQ (*vecp++, buf)) |
1957 | goto changed; | |
1958 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
1959 | goto changed; | |
1960 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
1961 | goto changed; | |
1962 | } | |
50cf83f8 RS |
1963 | /* Detect deletion of a buffer at the end of the list. */ |
1964 | if (*vecp == Qlambda) | |
1965 | return Qnil; | |
078b3696 | 1966 | changed: |
5dad8282 | 1967 | /* Start with 1 so there is room for at least one lambda at the end. */ |
078b3696 KH |
1968 | n = 1; |
1969 | FOR_EACH_FRAME (tail, frame) | |
d1dad759 | 1970 | n += 2; |
078b3696 KH |
1971 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1972 | n += 3; | |
267ad509 KH |
1973 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ |
1974 | if (n > XVECTOR (frame_and_buffer_state)->size | |
d1dad759 KH |
1975 | || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) |
1976 | /* Add 20 extra so we grow it less often. */ | |
1977 | frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); | |
078b3696 KH |
1978 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1979 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1980 | { |
1981 | *vecp++ = frame; | |
1982 | *vecp++ = XFRAME (frame)->name; | |
1983 | } | |
078b3696 KH |
1984 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1985 | { | |
1986 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1987 | /* Ignore buffers that aren't included in buffer lists. */ |
1988 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1989 | continue; | |
078b3696 KH |
1990 | *vecp++ = buf; |
1991 | *vecp++ = XBUFFER (buf)->read_only; | |
1992 | *vecp++ = Fbuffer_modified_p (buf); | |
1993 | } | |
d1dad759 KH |
1994 | /* Fill up the vector with lambdas (always at least one). */ |
1995 | *vecp++ = Qlambda; | |
1996 | while (vecp - XVECTOR (frame_and_buffer_state)->contents | |
1997 | < XVECTOR (frame_and_buffer_state)->size) | |
267ad509 | 1998 | *vecp++ = Qlambda; |
d1dad759 KH |
1999 | /* Make sure we didn't overflow the vector. */ |
2000 | if (vecp - XVECTOR (frame_and_buffer_state)->contents | |
2001 | > XVECTOR (frame_and_buffer_state)->size) | |
2002 | abort (); | |
078b3696 KH |
2003 | return Qt; |
2004 | } | |
2005 | \f | |
4588ec20 JB |
2006 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
2007 | 1, 1, "FOpen termscript file: ", | |
2008 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
2009 | FILE = nil means just close any termscript file currently open.") | |
2010 | (file) | |
2011 | Lisp_Object file; | |
2012 | { | |
2013 | if (termscript != 0) fclose (termscript); | |
2014 | termscript = 0; | |
2015 | ||
efb859b4 | 2016 | if (! NILP (file)) |
4588ec20 JB |
2017 | { |
2018 | file = Fexpand_file_name (file, Qnil); | |
2019 | termscript = fopen (XSTRING (file)->data, "w"); | |
2020 | if (termscript == 0) | |
2021 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
2022 | } | |
2023 | return Qnil; | |
2024 | } | |
2025 | \f | |
2026 | ||
2027 | #ifdef SIGWINCH | |
efb859b4 | 2028 | SIGTYPE |
61cbef47 RS |
2029 | window_change_signal (signalnum) /* If we don't have an argument, */ |
2030 | int signalnum; /* some compilers complain in signal calls. */ | |
4588ec20 JB |
2031 | { |
2032 | int width, height; | |
2033 | extern int errno; | |
2034 | int old_errno = errno; | |
2035 | ||
502b9b64 | 2036 | get_frame_size (&width, &height); |
4588ec20 | 2037 | |
502b9b64 JB |
2038 | /* The frame size change obviously applies to a termcap-controlled |
2039 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 2040 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 2041 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
2042 | but don't reallocate the data structures now. Let that be done |
2043 | later outside of the signal handler. */ | |
2044 | ||
2045 | { | |
35f56f96 | 2046 | Lisp_Object tail, frame; |
4588ec20 | 2047 | |
35f56f96 | 2048 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2049 | { |
35f56f96 | 2050 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 2051 | { |
35f56f96 | 2052 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
2053 | break; |
2054 | } | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | signal (SIGWINCH, window_change_signal); | |
2059 | errno = old_errno; | |
2060 | } | |
2061 | #endif /* SIGWINCH */ | |
2062 | ||
2063 | ||
502b9b64 | 2064 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
2065 | |
2066 | do_pending_window_change () | |
2067 | { | |
2068 | /* If window_change_signal should have run before, run it now. */ | |
2069 | while (delayed_size_change) | |
2070 | { | |
35f56f96 | 2071 | Lisp_Object tail, frame; |
4588ec20 JB |
2072 | |
2073 | delayed_size_change = 0; | |
2074 | ||
35f56f96 | 2075 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2076 | { |
35f56f96 JB |
2077 | FRAME_PTR f = XFRAME (frame); |
2078 | ||
502b9b64 JB |
2079 | int height = FRAME_NEW_HEIGHT (f); |
2080 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 2081 | |
08f7aa3e | 2082 | if (height != 0 || width != 0) |
b6a65ac2 | 2083 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
2084 | } |
2085 | } | |
2086 | } | |
2087 | ||
2088 | ||
502b9b64 | 2089 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 2090 | indicate no change is to take place. |
4588ec20 | 2091 | |
b6a65ac2 JB |
2092 | If DELAY is non-zero, then assume we're being called from a signal |
2093 | handler, and queue the change for later - perhaps the next | |
2094 | redisplay. Since this tries to resize windows, we can't call it | |
2095 | from a signal handler. */ | |
2096 | ||
45140e01 RS |
2097 | change_frame_size (f, newheight, newwidth, pretend, delay) |
2098 | register FRAME_PTR f; | |
2099 | int newheight, newwidth, pretend; | |
2100 | { | |
2101 | Lisp_Object tail, frame; | |
3826ea1a | 2102 | |
8a376b3b | 2103 | if (! FRAME_WINDOW_P (f)) |
45140e01 | 2104 | { |
93e54836 RS |
2105 | /* When using termcap, or on MS-DOS, all frames use |
2106 | the same screen, so a change in size affects all frames. */ | |
45140e01 | 2107 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 2108 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 RS |
2109 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
2110 | pretend, delay); | |
2111 | } | |
2112 | else | |
2113 | change_frame_size_1 (f, newheight, newwidth, pretend, delay); | |
2114 | } | |
2115 | ||
2116 | static void | |
2117 | change_frame_size_1 (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 2118 | register FRAME_PTR frame; |
a1d789d0 | 2119 | int newheight, newwidth, pretend, delay; |
4588ec20 | 2120 | { |
9bfd4456 | 2121 | int new_frame_window_width; |
3826ea1a RS |
2122 | unsigned int total_glyphs; |
2123 | ||
4588ec20 | 2124 | /* If we can't deal with the change now, queue it for later. */ |
b6a65ac2 | 2125 | if (delay) |
4588ec20 | 2126 | { |
b6a65ac2 | 2127 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 2128 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
2129 | delayed_size_change = 1; |
2130 | return; | |
2131 | } | |
2132 | ||
502b9b64 JB |
2133 | /* This size-change overrides any pending one for this frame. */ |
2134 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
2135 | FRAME_NEW_WIDTH (frame) = 0; |
2136 | ||
08f7aa3e | 2137 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 EN |
2138 | if (newheight == 0) |
2139 | newheight = FRAME_HEIGHT (frame); | |
2140 | if (newwidth == 0) | |
2141 | newwidth = FRAME_WIDTH (frame); | |
9bfd4456 | 2142 | new_frame_window_width = FRAME_WINDOW_WIDTH_ARG (frame, newwidth); |
4588ec20 | 2143 | |
3826ea1a RS |
2144 | total_glyphs = newheight * (newwidth + 2) * sizeof (GLYPH); |
2145 | ||
2146 | /* If these sizes are so big they cause overflow, | |
2147 | just ignore the change. It's not clear what better we could do. */ | |
2148 | if (total_glyphs / sizeof (GLYPH) / newheight != newwidth + 2) | |
2149 | return; | |
2150 | ||
b6a65ac2 JB |
2151 | /* Round up to the smallest acceptable size. */ |
2152 | check_frame_size (frame, &newheight, &newwidth); | |
2153 | ||
2154 | /* If we're not changing the frame size, quit now. */ | |
2155 | if (newheight == FRAME_HEIGHT (frame) | |
9bfd4456 | 2156 | && new_frame_window_width == FRAME_WINDOW_WIDTH (frame)) |
4588ec20 JB |
2157 | return; |
2158 | ||
cbb95688 RS |
2159 | BLOCK_INPUT; |
2160 | ||
886a8a6c KH |
2161 | #ifdef MSDOS |
2162 | /* We only can set screen dimensions to certain values supported | |
2163 | by our video hardware. Try to find the smallest size greater | |
2164 | or equal to the requested dimensions. */ | |
2165 | dos_set_window_size (&newheight, &newwidth); | |
2166 | #endif | |
2167 | ||
b6a65ac2 | 2168 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 2169 | { |
b6a65ac2 | 2170 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 2171 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 2172 | { |
502b9b64 JB |
2173 | /* Frame has both root and minibuffer. */ |
2174 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 2175 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
a5d8b611 KH |
2176 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top, |
2177 | newheight - 1); | |
502b9b64 | 2178 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
2179 | } |
2180 | else | |
502b9b64 | 2181 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
2182 | set_window_height (FRAME_ROOT_WINDOW (frame), |
2183 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
2184 | |
2185 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
2186 | FrameRows = newheight; | |
4588ec20 JB |
2187 | |
2188 | #if 0 | |
502b9b64 | 2189 | if (frame->output_method == output_termcap) |
4588ec20 | 2190 | { |
b6a65ac2 | 2191 | frame_height = newheight; |
4588ec20 | 2192 | if (!pretend) |
b6a65ac2 | 2193 | FrameRows = newheight; |
4588ec20 JB |
2194 | } |
2195 | #endif | |
2196 | } | |
2197 | ||
9bfd4456 | 2198 | if (new_frame_window_width != FRAME_WINDOW_WIDTH (frame)) |
4588ec20 | 2199 | { |
9bfd4456 | 2200 | set_window_width (FRAME_ROOT_WINDOW (frame), new_frame_window_width, 0); |
b6a65ac2 | 2201 | if (FRAME_HAS_MINIBUF_P (frame)) |
9bfd4456 | 2202 | set_window_width (FRAME_MINIBUF_WINDOW (frame), new_frame_window_width, 0); |
4588ec20 | 2203 | |
b6a65ac2 | 2204 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 2205 | FrameCols = newwidth; |
4588ec20 | 2206 | #if 0 |
502b9b64 | 2207 | if (frame->output_method == output_termcap) |
4588ec20 | 2208 | { |
502b9b64 | 2209 | frame_width = newwidth; |
4588ec20 | 2210 | if (!pretend) |
502b9b64 | 2211 | FrameCols = newwidth; |
4588ec20 JB |
2212 | } |
2213 | #endif | |
2214 | } | |
2215 | ||
b6a65ac2 | 2216 | FRAME_HEIGHT (frame) = newheight; |
9bfd4456 | 2217 | SET_FRAME_WIDTH (frame, newwidth); |
986e61b8 | 2218 | |
29ec5d84 RS |
2219 | if (FRAME_CURSOR_X (frame) >= FRAME_WINDOW_WIDTH (frame)) |
2220 | FRAME_CURSOR_X (frame) = FRAME_WINDOW_WIDTH (frame) - 1; | |
986e61b8 RS |
2221 | if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) |
2222 | FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; | |
2223 | ||
502b9b64 JB |
2224 | remake_frame_glyphs (frame); |
2225 | calculate_costs (frame); | |
97cf50e7 RS |
2226 | |
2227 | UNBLOCK_INPUT; | |
4588ec20 JB |
2228 | } |
2229 | \f | |
2230 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
2231 | Ssend_string_to_terminal, 1, 1, 0, | |
2232 | "Send STRING to the terminal without alteration.\n\ | |
2233 | Control characters in STRING will have terminal-dependent effects.") | |
e912ba09 EN |
2234 | (string) |
2235 | Lisp_Object string; | |
4588ec20 | 2236 | { |
e912ba09 EN |
2237 | CHECK_STRING (string, 0); |
2238 | fwrite (XSTRING (string)->data, 1, XSTRING (string)->size, stdout); | |
4588ec20 JB |
2239 | fflush (stdout); |
2240 | if (termscript) | |
2241 | { | |
e912ba09 | 2242 | fwrite (XSTRING (string)->data, 1, XSTRING (string)->size, termscript); |
4588ec20 JB |
2243 | fflush (termscript); |
2244 | } | |
2245 | return Qnil; | |
2246 | } | |
2247 | ||
2248 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
2249 | "Beep, or flash the screen.\n\ | |
2250 | Also, unless an argument is given,\n\ | |
2251 | terminate any keyboard macro currently executing.") | |
2252 | (arg) | |
2253 | Lisp_Object arg; | |
2254 | { | |
efb859b4 | 2255 | if (!NILP (arg)) |
4588ec20 | 2256 | { |
7fa788da RS |
2257 | if (noninteractive) |
2258 | putchar (07); | |
2259 | else | |
2260 | ring_bell (); | |
4588ec20 JB |
2261 | fflush (stdout); |
2262 | } | |
2263 | else | |
2264 | bitch_at_user (); | |
2265 | ||
2266 | return Qnil; | |
2267 | } | |
2268 | ||
2269 | bitch_at_user () | |
2270 | { | |
2271 | if (noninteractive) | |
2272 | putchar (07); | |
2273 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
2274 | error ("Keyboard macro terminated by a command ringing the bell"); | |
2275 | else | |
2276 | ring_bell (); | |
2277 | fflush (stdout); | |
2278 | } | |
2279 | ||
2280 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 2281 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
2282 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2283 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2284 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2285 | Emacs was built without floating point support.\n\ | |
2286 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
2287 | (seconds, milliseconds) |
2288 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 2289 | { |
767229f8 | 2290 | int sec, usec; |
4588ec20 | 2291 | |
767229f8 | 2292 | if (NILP (milliseconds)) |
e9c9a718 | 2293 | XSETINT (milliseconds, 0); |
767229f8 JB |
2294 | else |
2295 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2296 | usec = XINT (milliseconds) * 1000; |
2297 | ||
2298 | #ifdef LISP_FLOAT_TYPE | |
2299 | { | |
2300 | double duration = extract_float (seconds); | |
2301 | sec = (int) duration; | |
2302 | usec += (duration - sec) * 1000000; | |
2303 | } | |
2304 | #else | |
2305 | CHECK_NUMBER (seconds, 0); | |
2306 | sec = XINT (seconds); | |
2307 | #endif | |
4588ec20 | 2308 | |
a41f8bed | 2309 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2310 | if (sec == 0 && usec != 0) |
2311 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 2312 | #endif |
767229f8 JB |
2313 | |
2314 | /* Assure that 0 <= usec < 1000000. */ | |
2315 | if (usec < 0) | |
2316 | { | |
2317 | /* We can't rely on the rounding being correct if user is negative. */ | |
2318 | if (-1000000 < usec) | |
2319 | sec--, usec += 1000000; | |
2320 | else | |
2321 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 2322 | } |
767229f8 JB |
2323 | else |
2324 | sec += usec / 1000000, usec %= 1000000; | |
2325 | ||
6b5153b1 | 2326 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 2327 | return Qnil; |
4588ec20 | 2328 | |
f76475ad JB |
2329 | { |
2330 | Lisp_Object zero; | |
2331 | ||
a5d8b611 | 2332 | XSETFASTINT (zero, 0); |
f76475ad JB |
2333 | wait_reading_process_input (sec, usec, zero, 0); |
2334 | } | |
d1af74e9 | 2335 | |
767229f8 JB |
2336 | /* We should always have wait_reading_process_input; we have a dummy |
2337 | implementation for systems which don't support subprocesses. */ | |
2338 | #if 0 | |
2339 | /* No wait_reading_process_input */ | |
4588ec20 JB |
2340 | immediate_quit = 1; |
2341 | QUIT; | |
2342 | ||
2343 | #ifdef VMS | |
2344 | sys_sleep (sec); | |
2345 | #else /* not VMS */ | |
2346 | /* The reason this is done this way | |
2347 | (rather than defined (H_S) && defined (H_T)) | |
2348 | is because the VMS preprocessor doesn't grok `defined' */ | |
2349 | #ifdef HAVE_SELECT | |
a41f8bed JB |
2350 | EMACS_GET_TIME (end_time); |
2351 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 2352 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 2353 | |
4588ec20 JB |
2354 | while (1) |
2355 | { | |
a41f8bed JB |
2356 | EMACS_GET_TIME (timeout); |
2357 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2358 | if (EMACS_TIME_NEG_P (timeout) | |
2359 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
2360 | break; |
2361 | } | |
4588ec20 JB |
2362 | #else /* not HAVE_SELECT */ |
2363 | sleep (sec); | |
2364 | #endif /* HAVE_SELECT */ | |
2365 | #endif /* not VMS */ | |
2366 | ||
2367 | immediate_quit = 0; | |
2368 | #endif /* no subprocesses */ | |
2369 | ||
2370 | return Qnil; | |
2371 | } | |
2372 | ||
f76475ad JB |
2373 | /* This is just like wait_reading_process_input, except that |
2374 | it does the redisplay. | |
2375 | ||
ea0d86af | 2376 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 2377 | waiting for input as well. */ |
4588ec20 | 2378 | |
f76475ad JB |
2379 | Lisp_Object |
2380 | sit_for (sec, usec, reading, display) | |
2381 | int sec, usec, reading, display; | |
2382 | { | |
2383 | Lisp_Object read_kbd; | |
4588ec20 | 2384 | |
ccddf474 RS |
2385 | swallow_events (display); |
2386 | ||
f80bd2d7 | 2387 | if (detect_input_pending_run_timers (display)) |
4588ec20 | 2388 | return Qnil; |
4588ec20 | 2389 | |
f76475ad JB |
2390 | if (display) |
2391 | redisplay_preserve_echo_area (); | |
4588ec20 | 2392 | |
dfdb645c JB |
2393 | if (sec == 0 && usec == 0) |
2394 | return Qt; | |
2395 | ||
4588ec20 | 2396 | #ifdef SIGIO |
8fc798e9 | 2397 | gobble_input (0); |
f76475ad JB |
2398 | #endif |
2399 | ||
e9c9a718 | 2400 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
2401 | wait_reading_process_input (sec, usec, read_kbd, display); |
2402 | ||
d1af74e9 | 2403 | |
500ab754 JB |
2404 | /* wait_reading_process_input should always be available now; it is |
2405 | simulated in a simple way on systems that don't support | |
2406 | subprocesses. */ | |
2407 | #if 0 | |
2408 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
2409 | immediate_quit = 1; |
2410 | QUIT; | |
2411 | ||
2412 | waitchannels = 1; | |
2413 | #ifdef VMS | |
f76475ad | 2414 | input_wait_timeout (XINT (arg)); |
4588ec20 | 2415 | #else /* not VMS */ |
d1af74e9 JB |
2416 | #ifndef HAVE_TIMEVAL |
2417 | timeout_sec = sec; | |
2418 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
2419 | #else /* HAVE_TIMEVAL */ | |
2420 | timeout.tv_sec = sec; | |
2421 | timeout.tv_usec = usec; | |
4588ec20 | 2422 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 2423 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
2424 | #endif /* not VMS */ |
2425 | ||
2426 | immediate_quit = 0; | |
d1af74e9 | 2427 | #endif |
4588ec20 JB |
2428 | |
2429 | return detect_input_pending () ? Qnil : Qt; | |
2430 | } | |
2431 | ||
f76475ad | 2432 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2433 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2434 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2435 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2436 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2437 | Emacs was built without floating point support.\n\ | |
2438 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
e912ba09 | 2439 | Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\ |
f76475ad JB |
2440 | Redisplay is preempted as always if input arrives, and does not happen\n\ |
2441 | if input is available before it starts.\n\ | |
2442 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2443 | (seconds, milliseconds, nodisp) |
2444 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2445 | { |
767229f8 | 2446 | int sec, usec; |
f76475ad | 2447 | |
767229f8 | 2448 | if (NILP (milliseconds)) |
e9c9a718 | 2449 | XSETINT (milliseconds, 0); |
767229f8 JB |
2450 | else |
2451 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2452 | usec = XINT (milliseconds) * 1000; |
2453 | ||
2454 | #ifdef LISP_FLOAT_TYPE | |
2455 | { | |
2456 | double duration = extract_float (seconds); | |
2457 | sec = (int) duration; | |
2458 | usec += (duration - sec) * 1000000; | |
2459 | } | |
2460 | #else | |
2461 | CHECK_NUMBER (seconds, 0); | |
2462 | sec = XINT (seconds); | |
2463 | #endif | |
f76475ad | 2464 | |
f76475ad | 2465 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2466 | if (usec != 0 && sec == 0) |
2467 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2468 | #endif |
f76475ad JB |
2469 | |
2470 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
2471 | } | |
4588ec20 JB |
2472 | \f |
2473 | char *terminal_type; | |
2474 | ||
2475 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2476 | /* Determine terminal type and set terminal_driver */ | |
2477 | /* Then invoke its decoding routine to set up variables | |
2478 | in the terminal package */ | |
2479 | ||
2480 | init_display () | |
2481 | { | |
2482 | #ifdef HAVE_X_WINDOWS | |
2483 | extern int display_arg; | |
2484 | #endif | |
2485 | ||
2486 | meta_key = 0; | |
2487 | inverse_video = 0; | |
2488 | cursor_in_echo_area = 0; | |
2489 | terminal_type = (char *) 0; | |
2490 | ||
1315c181 JB |
2491 | /* Now is the time to initialize this; it's used by init_sys_modes |
2492 | during startup. */ | |
2493 | Vwindow_system = Qnil; | |
4588ec20 | 2494 | |
1315c181 JB |
2495 | /* If the user wants to use a window system, we shouldn't bother |
2496 | initializing the terminal. This is especially important when the | |
2497 | terminal is so dumb that emacs gives up before and doesn't bother | |
2498 | using the window system. | |
4588ec20 | 2499 | |
36bbad1d KH |
2500 | If the DISPLAY environment variable is set and nonempty, |
2501 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
2502 | |
2503 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2504 | if (! display_arg) |
2505 | { | |
36bbad1d | 2506 | char *display; |
d460af17 | 2507 | #ifdef VMS |
36bbad1d | 2508 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 2509 | #else |
36bbad1d | 2510 | display = getenv ("DISPLAY"); |
d460af17 | 2511 | #endif |
36bbad1d KH |
2512 | |
2513 | display_arg = (display != 0 && *display != 0); | |
f040093a | 2514 | } |
d460af17 | 2515 | |
e3171469 | 2516 | if (!inhibit_window_system && display_arg && initialized) |
4588ec20 JB |
2517 | { |
2518 | Vwindow_system = intern ("x"); | |
2519 | #ifdef HAVE_X11 | |
2520 | Vwindow_system_version = make_number (11); | |
2521 | #else | |
2522 | Vwindow_system_version = make_number (10); | |
039e5d71 KH |
2523 | #endif |
2524 | #if defined (LINUX) && defined (HAVE_LIBNCURSES) | |
2525 | /* In some versions of ncurses, | |
6a428f77 | 2526 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
2527 | So call tgetent. */ |
2528 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
2529 | #endif |
2530 | return; | |
2531 | } | |
2532 | #endif /* HAVE_X_WINDOWS */ | |
2533 | ||
fd2e066a GV |
2534 | #ifdef HAVE_NTGUI |
2535 | if (!inhibit_window_system) | |
2536 | { | |
60c7469c | 2537 | Vwindow_system = intern ("w32"); |
fd2e066a GV |
2538 | Vwindow_system_version = make_number (1); |
2539 | return; | |
2540 | } | |
2541 | #endif /* HAVE_NTGUI */ | |
2542 | ||
4588ec20 JB |
2543 | /* If no window system has been specified, try to use the terminal. */ |
2544 | if (! isatty (0)) | |
2545 | { | |
1559a86d | 2546 | fatal ("standard input is not a tty"); |
4588ec20 JB |
2547 | exit (1); |
2548 | } | |
2549 | ||
2550 | /* Look at the TERM variable */ | |
2551 | terminal_type = (char *) getenv ("TERM"); | |
2552 | if (!terminal_type) | |
2553 | { | |
2554 | #ifdef VMS | |
2555 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2556 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2557 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2558 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2559 | #else | |
2560 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2561 | #endif | |
2562 | exit (1); | |
2563 | } | |
2564 | ||
2565 | #ifdef VMS | |
2566 | /* VMS DCL tends to upcase things, so downcase term type. | |
2567 | Hardly any uppercase letters in terminal types; should be none. */ | |
2568 | { | |
2569 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2570 | char *p; | |
2571 | ||
2572 | strcpy (new, terminal_type); | |
2573 | ||
2574 | for (p = new; *p; p++) | |
2575 | if (isupper (*p)) | |
2576 | *p = tolower (*p); | |
2577 | ||
2578 | terminal_type = new; | |
2579 | } | |
2580 | #endif | |
2581 | ||
2582 | term_init (terminal_type); | |
2583 | ||
d86c299a RS |
2584 | { |
2585 | int width = FRAME_WINDOW_WIDTH (selected_frame); | |
2586 | int height = FRAME_HEIGHT (selected_frame); | |
2587 | ||
2588 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
2589 | ||
2590 | /* If these sizes are so big they cause overflow, | |
2591 | just ignore the change. It's not clear what better we could do. */ | |
2592 | if (total_glyphs / sizeof (GLYPH) / height != width + 2) | |
1559a86d | 2593 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
2594 | } |
2595 | ||
502b9b64 JB |
2596 | remake_frame_glyphs (selected_frame); |
2597 | calculate_costs (selected_frame); | |
4588ec20 JB |
2598 | |
2599 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2600 | FRAME_CURSOR_X (selected_frame) = 0; |
2601 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2602 | |
2603 | #ifdef SIGWINCH | |
2604 | #ifndef CANNOT_DUMP | |
2605 | if (initialized) | |
2606 | #endif /* CANNOT_DUMP */ | |
2607 | signal (SIGWINCH, window_change_signal); | |
2608 | #endif /* SIGWINCH */ | |
2609 | } | |
2610 | \f | |
2611 | syms_of_display () | |
2612 | { | |
502b9b64 | 2613 | defsubr (&Sredraw_frame); |
4588ec20 | 2614 | defsubr (&Sredraw_display); |
078b3696 | 2615 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
2616 | defsubr (&Sopen_termscript); |
2617 | defsubr (&Sding); | |
2618 | defsubr (&Ssit_for); | |
2619 | defsubr (&Ssleep_for); | |
2620 | defsubr (&Ssend_string_to_terminal); | |
2621 | ||
d1dad759 | 2622 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
2623 | staticpro (&frame_and_buffer_state); |
2624 | ||
9cda4f7c RS |
2625 | Qdisplay_table = intern ("display-table"); |
2626 | staticpro (&Qdisplay_table); | |
2627 | ||
4588ec20 | 2628 | DEFVAR_INT ("baud-rate", &baud_rate, |
eb285955 | 2629 | "*The output baud rate of the terminal.\n\ |
4588ec20 JB |
2630 | On most systems, changing this value will affect the amount of padding\n\ |
2631 | and the other strategic decisions made during redisplay."); | |
2632 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2633 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2634 | This means everything is in inverse video which otherwise would not be."); |
2635 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2636 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2637 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2638 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2639 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2640 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2641 | It is up to you to set this variable if your terminal can do that."); |
2642 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2643 | "A symbol naming the window-system under which Emacs is running\n\ | |
2644 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2645 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2646 | "The version number of the window system in use.\n\ | |
2647 | For X windows, this is 10 or 11."); | |
2648 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2649 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2650 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2651 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2652 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2653 | Each element can be:\n\ | |
2654 | integer: a glyph code which this glyph is an alias for.\n\ | |
2655 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2656 | nil: this glyph mod 256 is char code to output,\n\ | |
6666f05a | 2657 | and this glyph / 256 is face code for X windows (see `face-id')."); |
4588ec20 JB |
2658 | Vglyph_table = Qnil; |
2659 | ||
2660 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2661 | "Display table to use for buffers that specify none.\n\ | |
2662 | See `buffer-display-table' for more information."); | |
2663 | Vstandard_display_table = Qnil; | |
2664 | ||
2665 | /* Initialize `window-system', unless init_display already decided it. */ | |
2666 | #ifdef CANNOT_DUMP | |
2667 | if (noninteractive) | |
2668 | #endif | |
2669 | { | |
2670 | Vwindow_system = Qnil; | |
2671 | Vwindow_system_version = Qnil; | |
2672 | } | |
2673 | } |