Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
c6c5df7f | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 8 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
2396e3da | 22 | #include <stdio.h> |
4588ec20 | 23 | |
18160b98 | 24 | #include <config.h> |
4588ec20 JB |
25 | #include <ctype.h> |
26 | ||
47099d6f | 27 | #include "lisp.h" |
4588ec20 JB |
28 | #include "termchar.h" |
29 | #include "termopts.h" | |
3be08bea | 30 | #include "termhooks.h" |
4588ec20 | 31 | #include "cm.h" |
4588ec20 JB |
32 | #include "dispextern.h" |
33 | #include "buffer.h" | |
502b9b64 | 34 | #include "frame.h" |
4588ec20 JB |
35 | #include "window.h" |
36 | #include "commands.h" | |
37 | #include "disptab.h" | |
38 | #include "indent.h" | |
d169fe39 | 39 | #include "intervals.h" |
4588ec20 | 40 | |
648fa17d | 41 | #include "systty.h" |
a41f8bed JB |
42 | #include "systime.h" |
43 | ||
4588ec20 JB |
44 | #ifdef HAVE_X_WINDOWS |
45 | #include "xterm.h" | |
46 | #endif /* HAVE_X_WINDOWS */ | |
47 | ||
48 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
49 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
50 | ||
51 | #ifndef PENDING_OUTPUT_COUNT | |
52 | /* Get number of chars of output now in the buffer of a stdio stream. | |
53 | This ought to be built in in stdio, but it isn't. | |
54 | Some s- files override this because their stdio internals differ. */ | |
e3271ae5 RM |
55 | #ifdef __GNU_LIBRARY__ |
56 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) | |
57 | #else | |
4588ec20 JB |
58 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
59 | #endif | |
e3271ae5 | 60 | #endif |
4588ec20 | 61 | |
a41f8bed | 62 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 63 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 64 | |
502b9b64 | 65 | int frame_garbaged; |
4588ec20 JB |
66 | |
67 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
68 | ||
69 | int display_completed; | |
70 | ||
71 | /* Lisp variable visible-bell; enables use of screen-flash | |
72 | instead of audible bell. */ | |
73 | ||
74 | int visible_bell; | |
75 | ||
502b9b64 | 76 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
77 | |
78 | int inverse_video; | |
79 | ||
80 | /* Line speed of the terminal. */ | |
81 | ||
82 | int baud_rate; | |
83 | ||
84 | /* nil or a symbol naming the window system under which emacs is | |
85 | running ('x is the only current possibility). */ | |
86 | ||
87 | Lisp_Object Vwindow_system; | |
88 | ||
89 | /* Version number of X windows: 10, 11 or nil. */ | |
90 | Lisp_Object Vwindow_system_version; | |
91 | ||
92 | /* Vector of glyph definitions. Indexed by glyph number, | |
93 | the contents are a string which is how to output the glyph. | |
94 | ||
95 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
96 | as a character code. */ | |
97 | ||
98 | Lisp_Object Vglyph_table; | |
99 | ||
100 | /* Display table to use for vectors that don't specify their own. */ | |
101 | ||
102 | Lisp_Object Vstandard_display_table; | |
103 | ||
104 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
105 | so put cursor on minibuffer after the prompt. |
106 | positive means at end of text in echo area; | |
107 | negative means at beginning of line. */ | |
4588ec20 JB |
108 | int cursor_in_echo_area; |
109 | \f | |
502b9b64 JB |
110 | /* The currently selected frame. |
111 | In a single-frame version, this variable always remains 0. */ | |
4588ec20 | 112 | |
502b9b64 | 113 | FRAME_PTR selected_frame; |
4588ec20 | 114 | |
502b9b64 JB |
115 | /* A frame which is not just a minibuffer, or 0 if there are no such |
116 | frames. This is usually the most recent such frame that was | |
117 | selected. In a single-frame version, this variable always remains 0. */ | |
118 | FRAME_PTR last_nonminibuf_frame; | |
e5d77022 | 119 | |
502b9b64 | 120 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
121 | exist inside frame objects lives in the following structure instead. |
122 | ||
123 | NOTE: the_only_frame is not checked for garbage collection; don't | |
eb8c3be9 | 124 | store collectible objects in any of its fields! |
190721ac JB |
125 | |
126 | You're not/The only frame in town/... */ | |
4588ec20 | 127 | |
502b9b64 JB |
128 | #ifndef MULTI_FRAME |
129 | struct frame the_only_frame; | |
e5d77022 | 130 | #endif |
4588ec20 JB |
131 | |
132 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
133 | which is used inside `update_frame' to hold the old contents |
134 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
135 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
136 | /* Length of vector currently allocated. */ |
137 | int ophys_lines_length; | |
138 | ||
139 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
140 | ||
141 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
142 | ||
143 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
144 | ||
4588ec20 | 145 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 146 | \f |
502b9b64 | 147 | #ifdef MULTI_FRAME |
4588ec20 | 148 | |
502b9b64 JB |
149 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
150 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
151 | (frame) | |
152 | Lisp_Object frame; | |
4588ec20 | 153 | { |
502b9b64 | 154 | FRAME_PTR f; |
4588ec20 | 155 | |
502b9b64 JB |
156 | CHECK_LIVE_FRAME (frame, 0); |
157 | f = XFRAME (frame); | |
158 | update_begin (f); | |
4588ec20 | 159 | /* set_terminal_modes (); */ |
502b9b64 | 160 | clear_frame (); |
b6a65ac2 | 161 | clear_frame_records (f); |
502b9b64 | 162 | update_end (f); |
4588ec20 | 163 | fflush (stdout); |
4588ec20 JB |
164 | windows_or_buffers_changed++; |
165 | /* Mark all windows as INaccurate, | |
166 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
167 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
168 | f->garbaged = 0; | |
4588ec20 JB |
169 | return Qnil; |
170 | } | |
171 | ||
502b9b64 JB |
172 | redraw_frame (f) |
173 | FRAME_PTR f; | |
4588ec20 | 174 | { |
502b9b64 JB |
175 | Lisp_Object frame; |
176 | XSET (frame, Lisp_Frame, f); | |
177 | Fredraw_frame (frame); | |
4588ec20 JB |
178 | } |
179 | ||
35f56f96 | 180 | #else |
4588ec20 | 181 | |
d8039c5c | 182 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
35f56f96 JB |
183 | "Clear frame FRAME and output again what is supposed to appear on it.") |
184 | (frame) | |
185 | Lisp_Object frame; | |
4588ec20 JB |
186 | { |
187 | update_begin (0); | |
188 | set_terminal_modes (); | |
502b9b64 | 189 | clear_frame (); |
4588ec20 JB |
190 | update_end (0); |
191 | fflush (stdout); | |
502b9b64 | 192 | clear_frame_records (0); |
4588ec20 JB |
193 | windows_or_buffers_changed++; |
194 | /* Mark all windows as INaccurate, | |
195 | so that every window will have its redisplay done. */ | |
b5c685f4 | 196 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
197 | return Qnil; |
198 | } | |
199 | ||
35f56f96 JB |
200 | #endif |
201 | ||
202 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
203 | "Clear and redisplay all visible frames.") | |
204 | () | |
205 | { | |
206 | Lisp_Object tail, frame; | |
207 | ||
208 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 209 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
210 | Fredraw_frame (frame); |
211 | ||
212 | return Qnil; | |
213 | } | |
214 | ||
9223a96a RS |
215 | /* This is used when frame_garbaged is set. |
216 | Redraw the individual frames marked as garbaged. */ | |
217 | ||
218 | void | |
219 | redraw_garbaged_frames () | |
220 | { | |
221 | Lisp_Object tail, frame; | |
222 | ||
223 | FOR_EACH_FRAME (tail, frame) | |
224 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
225 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
226 | Fredraw_frame (frame); | |
227 | } | |
228 | ||
4588ec20 | 229 | \f |
502b9b64 JB |
230 | static struct frame_glyphs * |
231 | make_frame_glyphs (frame, empty) | |
232 | register FRAME_PTR frame; | |
4588ec20 JB |
233 | int empty; |
234 | { | |
235 | register int i; | |
502b9b64 JB |
236 | register width = FRAME_WIDTH (frame); |
237 | register height = FRAME_HEIGHT (frame); | |
238 | register struct frame_glyphs *new = | |
239 | (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 240 | |
502b9b64 | 241 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
242 | new->height = height; |
243 | new->width = width; | |
244 | new->used = (int *) xmalloc (height * sizeof (int)); | |
245 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
246 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
247 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
248 | bzero (new->enable, height * sizeof (char)); | |
249 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
250 | ||
251 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 252 | if (FRAME_X_P (frame)) |
4588ec20 | 253 | { |
4588ec20 JB |
254 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
255 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
256 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
257 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 258 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
259 | } |
260 | #endif | |
261 | ||
262 | if (empty) | |
263 | { | |
264 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 265 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 JB |
266 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
267 | ||
268 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
269 | bzero (new->total_contents, total_glyphs); | |
270 | } | |
271 | else | |
272 | { | |
273 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
274 | ||
275 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
276 | bzero (new->total_contents, total_glyphs); | |
277 | for (i = 0; i < height; i++) | |
278 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
279 | } | |
280 | ||
281 | return new; | |
282 | } | |
283 | ||
284 | static void | |
502b9b64 JB |
285 | free_frame_glyphs (frame, glyphs) |
286 | FRAME_PTR frame; | |
287 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
288 | { |
289 | if (glyphs->total_contents) | |
9ac0d9e0 | 290 | xfree (glyphs->total_contents); |
4588ec20 | 291 | |
9ac0d9e0 JB |
292 | xfree (glyphs->used); |
293 | xfree (glyphs->glyphs); | |
294 | xfree (glyphs->highlight); | |
295 | xfree (glyphs->enable); | |
296 | xfree (glyphs->bufp); | |
4588ec20 JB |
297 | |
298 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 299 | if (FRAME_X_P (frame)) |
4588ec20 | 300 | { |
9ac0d9e0 JB |
301 | xfree (glyphs->top_left_x); |
302 | xfree (glyphs->top_left_y); | |
303 | xfree (glyphs->pix_width); | |
304 | xfree (glyphs->pix_height); | |
305 | xfree (glyphs->max_ascent); | |
4588ec20 JB |
306 | } |
307 | #endif | |
308 | ||
9ac0d9e0 | 309 | xfree (glyphs); |
4588ec20 JB |
310 | } |
311 | ||
312 | static void | |
502b9b64 JB |
313 | remake_frame_glyphs (frame) |
314 | FRAME_PTR frame; | |
4588ec20 | 315 | { |
502b9b64 JB |
316 | if (FRAME_CURRENT_GLYPHS (frame)) |
317 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
318 | if (FRAME_DESIRED_GLYPHS (frame)) | |
319 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
320 | if (FRAME_TEMP_GLYPHS (frame)) | |
321 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
322 | ||
323 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
324 | { |
325 | /* Reallocate the frame's message buffer; remember that | |
326 | echo_area_glyphs may be pointing here. */ | |
327 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
328 | ||
329 | FRAME_MESSAGE_BUF (frame) | |
330 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
331 | FRAME_WIDTH (frame) + 1); | |
332 | ||
333 | if (echo_area_glyphs == old_message_buf) | |
334 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
335 | if (previous_echo_glyphs == old_message_buf) | |
336 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
337 | } | |
4588ec20 | 338 | else |
502b9b64 JB |
339 | FRAME_MESSAGE_BUF (frame) |
340 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 341 | |
502b9b64 JB |
342 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
343 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
344 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
345 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
346 | } |
347 | \f | |
502b9b64 | 348 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
349 | |
350 | static int | |
351 | line_hash_code (m, vpos) | |
502b9b64 | 352 | register struct frame_glyphs *m; |
4588ec20 JB |
353 | int vpos; |
354 | { | |
355 | register GLYPH *body, *end; | |
356 | register int h = 0; | |
357 | ||
358 | if (!m->enable[vpos]) | |
359 | return 0; | |
360 | ||
94aa5d2d | 361 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
362 | so as to encourage scrolling to leave them in place. */ |
363 | if (m->highlight[vpos]) | |
364 | return -1; | |
365 | ||
366 | body = m->glyphs[vpos]; | |
367 | ||
368 | if (must_write_spaces) | |
369 | while (1) | |
370 | { | |
371 | GLYPH g = *body++; | |
372 | ||
373 | if (g == 0) | |
374 | break; | |
375 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
376 | } | |
377 | else | |
378 | while (1) | |
379 | { | |
380 | GLYPH g = *body++; | |
381 | ||
382 | if (g == 0) | |
383 | break; | |
384 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
385 | } | |
386 | ||
387 | if (h) | |
388 | return h; | |
389 | return 1; | |
390 | } | |
391 | ||
392 | /* Return number of characters in line in M at vpos VPOS, | |
393 | except don't count leading and trailing spaces | |
394 | unless the terminal requires those to be explicitly output. */ | |
395 | ||
396 | static unsigned int | |
397 | line_draw_cost (m, vpos) | |
502b9b64 | 398 | struct frame_glyphs *m; |
4588ec20 JB |
399 | int vpos; |
400 | { | |
401 | register GLYPH *beg = m->glyphs[vpos]; | |
402 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
403 | register int i; | |
404 | register int tlen = GLYPH_TABLE_LENGTH; | |
405 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
406 | ||
407 | /* Ignore trailing and leading spaces if we can. */ | |
408 | if (!must_write_spaces) | |
409 | { | |
410 | while ((end != beg) && (*end == SPACEGLYPH)) | |
411 | --end; | |
412 | if (end == beg) | |
413 | return (0); /* All blank line. */ | |
414 | ||
415 | while (*beg == SPACEGLYPH) | |
416 | ++beg; | |
417 | } | |
418 | ||
419 | /* If we don't have a glyph-table, each glyph is one character, | |
420 | so return the number of glyphs. */ | |
421 | if (tbase == 0) | |
422 | return end - beg; | |
423 | ||
424 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
425 | i = 0; | |
426 | while ((beg <= end) && *beg) | |
427 | { | |
428 | register GLYPH g = *beg++; | |
429 | ||
430 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
431 | i += 1; | |
432 | else | |
433 | i += GLYPH_LENGTH (tbase, g); | |
434 | } | |
435 | return i; | |
436 | } | |
437 | \f | |
438 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
439 | ||
440 | The only other interface into redisplay is through setting | |
502b9b64 JB |
441 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
442 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
443 | |
444 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
445 | ||
502b9b64 | 446 | cancel_line (vpos, frame) |
4588ec20 | 447 | int vpos; |
502b9b64 | 448 | register FRAME_PTR frame; |
4588ec20 | 449 | { |
502b9b64 | 450 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
451 | } |
452 | ||
502b9b64 JB |
453 | clear_frame_records (frame) |
454 | register FRAME_PTR frame; | |
4588ec20 | 455 | { |
502b9b64 | 456 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
457 | } |
458 | ||
459 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
460 | ||
461 | void | |
502b9b64 JB |
462 | get_display_line (frame, vpos, hpos) |
463 | register FRAME_PTR frame; | |
4588ec20 JB |
464 | int vpos; |
465 | register int hpos; | |
466 | { | |
502b9b64 JB |
467 | register struct frame_glyphs *glyphs; |
468 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
469 | register GLYPH *p; |
470 | ||
7c3c72ec | 471 | if (vpos < 0) |
4588ec20 JB |
472 | abort (); |
473 | ||
474 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
475 | abort (); | |
476 | ||
477 | if (! desired_glyphs->enable[vpos]) | |
478 | { | |
479 | desired_glyphs->used[vpos] = 0; | |
480 | desired_glyphs->highlight[vpos] = 0; | |
481 | desired_glyphs->enable[vpos] = 1; | |
482 | } | |
483 | ||
484 | if (hpos > desired_glyphs->used[vpos]) | |
485 | { | |
486 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
487 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
488 | ||
489 | desired_glyphs->used[vpos] = hpos; | |
490 | while (g != end) | |
491 | *g++ = SPACEGLYPH; | |
492 | } | |
493 | } | |
494 | ||
495 | /* Like bcopy except never gets confused by overlap. */ | |
496 | ||
497 | void | |
498 | safe_bcopy (from, to, size) | |
499 | char *from, *to; | |
500 | int size; | |
501 | { | |
b5c685f4 | 502 | if (size <= 0 || from == to) |
4588ec20 JB |
503 | return; |
504 | ||
b5c685f4 JB |
505 | /* If the source and destination don't overlap, then bcopy can |
506 | handle it. If they do overlap, but the destination is lower in | |
507 | memory than the source, we'll assume bcopy can handle that. */ | |
508 | if (to < from || from + size <= to) | |
509 | bcopy (from, to, size); | |
510 | ||
511 | /* Otherwise, we'll copy from the end. */ | |
512 | else | |
4588ec20 | 513 | { |
b5c685f4 JB |
514 | register char *endf = from + size; |
515 | register char *endt = to + size; | |
4588ec20 JB |
516 | |
517 | /* If TO - FROM is large, then we should break the copy into | |
518 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
519 | TO - FROM is small, then the bcopy function call overhead | |
520 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
521 | anywhere. Since I don't think the obvious copy loop is too |
522 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
523 | if (to - from < 64) |
524 | { | |
525 | do | |
526 | *--endt = *--endf; | |
527 | while (endf != from); | |
528 | } | |
529 | else | |
530 | { | |
b5c685f4 | 531 | for (;;) |
4588ec20 JB |
532 | { |
533 | endt -= (to - from); | |
534 | endf -= (to - from); | |
535 | ||
b5c685f4 JB |
536 | if (endt < to) |
537 | break; | |
538 | ||
4588ec20 JB |
539 | bcopy (endf, endt, to - from); |
540 | } | |
b5c685f4 JB |
541 | |
542 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
543 | little left over. The amount left over is |
544 | (endt + (to - from)) - to, which is endt - from. */ | |
545 | bcopy (from, to, endt - from); | |
546 | } | |
547 | } | |
4588ec20 JB |
548 | } |
549 | ||
98038dc0 | 550 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
551 | DISTANCE may be negative. */ |
552 | ||
553 | static void | |
554 | rotate_vector (vector, size, distance) | |
555 | char *vector; | |
556 | int size; | |
557 | int distance; | |
558 | { | |
559 | char *temp = (char *) alloca (size); | |
560 | ||
561 | if (distance < 0) | |
562 | distance += size; | |
563 | ||
564 | bcopy (vector, temp + distance, size - distance); | |
565 | bcopy (vector + size - distance, temp, distance); | |
566 | bcopy (temp, vector, size); | |
567 | } | |
568 | ||
569 | /* Scroll lines from vpos FROM up to but not including vpos END | |
570 | down by AMOUNT lines (AMOUNT may be negative). | |
571 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
572 | ||
573 | int | |
502b9b64 JB |
574 | scroll_frame_lines (frame, from, end, amount) |
575 | register FRAME_PTR frame; | |
4588ec20 JB |
576 | int from, end, amount; |
577 | { | |
578 | register int i; | |
502b9b64 JB |
579 | register struct frame_glyphs *current_frame |
580 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
581 | |
582 | if (!line_ins_del_ok) | |
583 | return 0; | |
584 | ||
585 | if (amount == 0) | |
586 | return 1; | |
587 | ||
588 | if (amount > 0) | |
589 | { | |
502b9b64 | 590 | update_begin (frame); |
4588ec20 JB |
591 | set_terminal_window (end + amount); |
592 | if (!scroll_region_ok) | |
593 | ins_del_lines (end, -amount); | |
594 | ins_del_lines (from, amount); | |
595 | set_terminal_window (0); | |
596 | ||
502b9b64 | 597 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
598 | sizeof (GLYPH *) * (end + amount - from), |
599 | amount * sizeof (GLYPH *)); | |
600 | ||
502b9b64 JB |
601 | safe_bcopy (current_frame->used + from, |
602 | current_frame->used + from + amount, | |
603 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 604 | |
502b9b64 JB |
605 | safe_bcopy (current_frame->highlight + from, |
606 | current_frame->highlight + from + amount, | |
607 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 608 | |
502b9b64 JB |
609 | safe_bcopy (current_frame->enable + from, |
610 | current_frame->enable + from + amount, | |
611 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
612 | |
613 | /* Mark the lines made empty by scrolling as enabled, empty and | |
614 | normal video. */ | |
502b9b64 JB |
615 | bzero (current_frame->used + from, |
616 | amount * sizeof current_frame->used[0]); | |
617 | bzero (current_frame->highlight + from, | |
618 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
619 | for (i = from; i < from + amount; i++) |
620 | { | |
502b9b64 JB |
621 | current_frame->glyphs[i][0] = '\0'; |
622 | current_frame->enable[i] = 1; | |
4588ec20 JB |
623 | } |
624 | ||
502b9b64 JB |
625 | safe_bcopy (current_frame->bufp + from, |
626 | current_frame->bufp + from + amount, | |
627 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
628 | |
629 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 630 | if (FRAME_X_P (frame)) |
4588ec20 | 631 | { |
502b9b64 JB |
632 | safe_bcopy (current_frame->top_left_x + from, |
633 | current_frame->top_left_x + from + amount, | |
634 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 635 | |
502b9b64 JB |
636 | safe_bcopy (current_frame->top_left_y + from, |
637 | current_frame->top_left_y + from + amount, | |
638 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 639 | |
502b9b64 JB |
640 | safe_bcopy (current_frame->pix_width + from, |
641 | current_frame->pix_width + from + amount, | |
642 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 643 | |
502b9b64 JB |
644 | safe_bcopy (current_frame->pix_height + from, |
645 | current_frame->pix_height + from + amount, | |
646 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
647 | |
648 | safe_bcopy (current_frame->max_ascent + from, | |
649 | current_frame->max_ascent + from + amount, | |
650 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
651 | } |
652 | #endif /* HAVE_X_WINDOWS */ | |
653 | ||
502b9b64 | 654 | update_end (frame); |
4588ec20 JB |
655 | } |
656 | if (amount < 0) | |
657 | { | |
502b9b64 | 658 | update_begin (frame); |
4588ec20 JB |
659 | set_terminal_window (end); |
660 | ins_del_lines (from + amount, amount); | |
661 | if (!scroll_region_ok) | |
662 | ins_del_lines (end + amount, -amount); | |
663 | set_terminal_window (0); | |
664 | ||
502b9b64 | 665 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
666 | sizeof (GLYPH *) * (end - from - amount), |
667 | amount * sizeof (GLYPH *)); | |
668 | ||
502b9b64 JB |
669 | safe_bcopy (current_frame->used + from, |
670 | current_frame->used + from + amount, | |
671 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 672 | |
502b9b64 JB |
673 | safe_bcopy (current_frame->highlight + from, |
674 | current_frame->highlight + from + amount, | |
675 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 676 | |
502b9b64 JB |
677 | safe_bcopy (current_frame->enable + from, |
678 | current_frame->enable + from + amount, | |
679 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
680 | |
681 | /* Mark the lines made empty by scrolling as enabled, empty and | |
682 | normal video. */ | |
502b9b64 JB |
683 | bzero (current_frame->used + end + amount, |
684 | - amount * sizeof current_frame->used[0]); | |
685 | bzero (current_frame->highlight + end + amount, | |
686 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
687 | for (i = end + amount; i < end; i++) |
688 | { | |
502b9b64 JB |
689 | current_frame->glyphs[i][0] = '\0'; |
690 | current_frame->enable[i] = 1; | |
4588ec20 JB |
691 | } |
692 | ||
502b9b64 JB |
693 | safe_bcopy (current_frame->bufp + from, |
694 | current_frame->bufp + from + amount, | |
695 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
696 | |
697 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 698 | if (FRAME_X_P (frame)) |
4588ec20 | 699 | { |
502b9b64 JB |
700 | safe_bcopy (current_frame->top_left_x + from, |
701 | current_frame->top_left_x + from + amount, | |
702 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 703 | |
502b9b64 JB |
704 | safe_bcopy (current_frame->top_left_y + from, |
705 | current_frame->top_left_y + from + amount, | |
706 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 707 | |
502b9b64 JB |
708 | safe_bcopy (current_frame->pix_width + from, |
709 | current_frame->pix_width + from + amount, | |
710 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 711 | |
502b9b64 JB |
712 | safe_bcopy (current_frame->pix_height + from, |
713 | current_frame->pix_height + from + amount, | |
714 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
715 | |
716 | safe_bcopy (current_frame->max_ascent + from, | |
717 | current_frame->max_ascent + from + amount, | |
718 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
719 | } |
720 | #endif /* HAVE_X_WINDOWS */ | |
721 | ||
502b9b64 | 722 | update_end (frame); |
4588ec20 JB |
723 | } |
724 | return 1; | |
725 | } | |
726 | \f | |
502b9b64 | 727 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 728 | copy all the columns that W does not occupy |
502b9b64 JB |
729 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
730 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
731 | |
732 | preserve_other_columns (w) | |
733 | struct window *w; | |
734 | { | |
735 | register int vpos; | |
502b9b64 JB |
736 | register struct frame_glyphs *current_frame, *desired_frame; |
737 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
738 | int start = XFASTINT (w->left); |
739 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
740 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
741 | ||
502b9b64 JB |
742 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
743 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
744 | |
745 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
746 | { | |
502b9b64 | 747 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
748 | { |
749 | if (start > 0) | |
750 | { | |
751 | int len; | |
752 | ||
502b9b64 | 753 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 JB |
754 | desired_frame->glyphs[vpos], |
755 | start * sizeof (current_frame->glyphs[vpos])); | |
502b9b64 JB |
756 | len = min (start, current_frame->used[vpos]); |
757 | if (desired_frame->used[vpos] < len) | |
758 | desired_frame->used[vpos] = len; | |
4588ec20 | 759 | } |
502b9b64 JB |
760 | if (current_frame->used[vpos] > end |
761 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 762 | { |
502b9b64 JB |
763 | while (desired_frame->used[vpos] < end) |
764 | desired_frame->glyphs[vpos][desired_frame->used[vpos]++] | |
4588ec20 | 765 | = SPACEGLYPH; |
502b9b64 JB |
766 | bcopy (current_frame->glyphs[vpos] + end, |
767 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 JB |
768 | ((current_frame->used[vpos] - end) |
769 | * sizeof (current_frame->glyphs[vpos]))); | |
502b9b64 | 770 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
771 | } |
772 | } | |
773 | } | |
774 | } | |
775 | \f | |
776 | #if 0 | |
777 | ||
502b9b64 | 778 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 779 | copy all the columns that w does occupy |
502b9b64 JB |
780 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
781 | so that update_frame will not change those columns. | |
4588ec20 JB |
782 | |
783 | Have not been able to figure out how to use this correctly. */ | |
784 | ||
785 | preserve_my_columns (w) | |
786 | struct window *w; | |
787 | { | |
788 | register int vpos, fin; | |
502b9b64 JB |
789 | register struct frame_glyphs *l1, *l2; |
790 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
791 | int start = XFASTINT (w->left); |
792 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
793 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
794 | ||
795 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
796 | { | |
502b9b64 JB |
797 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
798 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
799 | { |
800 | if (l2->length > start && l1->length < l2->length) | |
801 | { | |
802 | fin = l2->length; | |
803 | if (fin > end) fin = end; | |
804 | while (l1->length < start) | |
805 | l1->body[l1->length++] = ' '; | |
806 | bcopy (l2->body + start, l1->body + start, fin - start); | |
807 | l1->length = fin; | |
808 | } | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
813 | #endif | |
814 | \f | |
815 | /* On discovering that the redisplay for a window was no good, | |
816 | cancel the columns of that window, so that when the window is | |
817 | displayed over again get_display_line will not complain. */ | |
818 | ||
819 | cancel_my_columns (w) | |
820 | struct window *w; | |
821 | { | |
822 | register int vpos; | |
502b9b64 JB |
823 | register struct frame_glyphs *desired_glyphs = |
824 | FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
825 | register int start = XFASTINT (w->left); |
826 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
827 | ||
828 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
829 | if (desired_glyphs->enable[vpos] | |
830 | && desired_glyphs->used[vpos] >= start) | |
831 | desired_glyphs->used[vpos] = start; | |
832 | } | |
833 | \f | |
502b9b64 | 834 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
835 | the necessary output for one change in the buffer. |
836 | They may return 0 meaning nothing was done if anything is difficult, | |
837 | or 1 meaning the output was performed properly. | |
502b9b64 | 838 | They assume that the frame was up to date before the buffer |
94aa5d2d | 839 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
840 | see command_loop_1 where these are called. */ |
841 | ||
842 | int | |
843 | direct_output_for_insert (g) | |
844 | int g; | |
845 | { | |
502b9b64 JB |
846 | register FRAME_PTR frame = selected_frame; |
847 | register struct frame_glyphs *current_frame | |
848 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
849 | |
850 | #ifndef COMPILER_REGISTER_BUG | |
851 | register | |
852 | #endif /* COMPILER_REGISTER_BUG */ | |
853 | struct window *w = XWINDOW (selected_window); | |
854 | #ifndef COMPILER_REGISTER_BUG | |
855 | register | |
856 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 857 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
858 | #ifndef COMPILER_REGISTER_BUG |
859 | register | |
860 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 861 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 862 | |
fa61c701 JB |
863 | /* Give up if about to continue line. */ |
864 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
865 | ||
4588ec20 JB |
866 | /* Avoid losing if cursor is in invisible text off left margin */ |
867 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
868 | ||
869 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 870 | || cursor_in_echo_area |
502b9b64 JB |
871 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
872 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 873 | |
502b9b64 | 874 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
875 | || !display_completed |
876 | ||
877 | /* Give up if buffer appears in two places. */ | |
878 | || buffer_shared > 1 | |
879 | ||
d169fe39 RS |
880 | #ifdef USE_TEXT_PROPERTIES |
881 | /* Intervals have already been adjusted, point is after the | |
882 | character that was just inserted. */ | |
ef4d2f9e | 883 | /* Give up if character is invisible. */ |
d169fe39 RS |
884 | /* Give up if character has a face property. |
885 | At the moment we only lose at end of line or end of buffer | |
886 | and only with faces that have some background */ | |
887 | /* Instead of wasting time, give up if character has any text properties */ | |
888 | || ! NILP (Ftext_properties_at (XFASTINT (point - 1), Qnil)) | |
889 | #endif | |
890 | ||
4588ec20 JB |
891 | /* Give up if w is minibuffer and a message is being displayed there */ |
892 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
893 | return 0; | |
894 | ||
517b2e01 JB |
895 | { |
896 | #ifdef HAVE_X_WINDOWS | |
897 | int dummy; | |
90b5299a | 898 | int face = compute_char_face (frame, w, point - 1, -1, -1, &dummy, point); |
517b2e01 | 899 | #endif |
a1c3de84 | 900 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
517b2e01 | 901 | } |
4588ec20 JB |
902 | unchanged_modified = MODIFF; |
903 | beg_unchanged = GPT - BEG; | |
904 | XFASTINT (w->last_point) = point; | |
905 | XFASTINT (w->last_point_x) = hpos; | |
906 | XFASTINT (w->last_modified) = MODIFF; | |
907 | ||
908 | reassert_line_highlight (0, vpos); | |
502b9b64 | 909 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 910 | fflush (stdout); |
502b9b64 JB |
911 | ++FRAME_CURSOR_X (frame); |
912 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 913 | { |
502b9b64 JB |
914 | current_frame->used[vpos] = hpos + 1; |
915 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
916 | } |
917 | ||
918 | return 1; | |
919 | } | |
920 | ||
921 | int | |
922 | direct_output_forward_char (n) | |
923 | int n; | |
924 | { | |
502b9b64 | 925 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 926 | register struct window *w = XWINDOW (selected_window); |
d169fe39 | 927 | int position; |
ea0d86af RS |
928 | int hpos = FRAME_CURSOR_X (frame); |
929 | ||
930 | /* Give up if in truncated text at end of line. */ | |
931 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1) | |
932 | return 0; | |
933 | ||
a9764248 JB |
934 | /* Avoid losing if cursor is in invisible text off left margin |
935 | or about to go off either side of window. */ | |
502b9b64 | 936 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
937 | && (XINT (w->hscroll) || n < 0)) |
938 | || (n > 0 | |
fa61c701 | 939 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 940 | || cursor_in_echo_area) |
4588ec20 | 941 | return 0; |
d169fe39 | 942 | |
de83c314 RS |
943 | /* Can't use direct output if highlighting a region. */ |
944 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
945 | return 0; | |
946 | ||
d169fe39 RS |
947 | #ifdef USE_TEXT_PROPERTIES |
948 | /* Don't use direct output next to an invisible character | |
949 | since we might need to do something special. */ | |
950 | ||
2f24f5ac RS |
951 | XFASTINT (position) = point; |
952 | if (XFASTINT (position) < ZV | |
294634fb | 953 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 954 | Qinvisible, |
294634fb KH |
955 | selected_window))) |
956 | return 0; | |
d169fe39 | 957 | |
2f24f5ac RS |
958 | XFASTINT (position) = point - 1; |
959 | if (XFASTINT (position) >= BEGV | |
294634fb | 960 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 961 | Qinvisible, |
294634fb KH |
962 | selected_window))) |
963 | return 0; | |
d169fe39 RS |
964 | #endif |
965 | ||
502b9b64 JB |
966 | FRAME_CURSOR_X (frame) += n; |
967 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); | |
4588ec20 | 968 | XFASTINT (w->last_point) = point; |
502b9b64 | 969 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 970 | fflush (stdout); |
d169fe39 | 971 | |
4588ec20 JB |
972 | return 1; |
973 | } | |
974 | \f | |
975 | static void update_line (); | |
976 | ||
502b9b64 | 977 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
978 | Value is nonzero if redisplay stopped due to pending input. |
979 | FORCE nonzero means do not stop for pending input. */ | |
980 | ||
981 | int | |
502b9b64 JB |
982 | update_frame (f, force, inhibit_hairy_id) |
983 | FRAME_PTR f; | |
4588ec20 JB |
984 | int force; |
985 | int inhibit_hairy_id; | |
986 | { | |
502b9b64 JB |
987 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (f); |
988 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (f); | |
4588ec20 JB |
989 | register int i; |
990 | int pause; | |
991 | int preempt_count = baud_rate / 2400 + 1; | |
992 | extern input_pending; | |
993 | #ifdef HAVE_X_WINDOWS | |
994 | register int downto, leftmost; | |
995 | #endif | |
996 | ||
d88c2b9e RS |
997 | if (preempt_count <= 0) |
998 | preempt_count = 1; | |
999 | ||
502b9b64 | 1000 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1001 | |
1002 | detect_input_pending (); | |
1003 | if (input_pending && !force) | |
1004 | { | |
1005 | pause = 1; | |
1006 | goto do_pause; | |
1007 | } | |
1008 | ||
502b9b64 | 1009 | update_begin (f); |
4588ec20 JB |
1010 | |
1011 | if (!line_ins_del_ok) | |
1012 | inhibit_hairy_id = 1; | |
1013 | ||
efb859b4 JB |
1014 | /* See if any of the desired lines are enabled; don't compute for |
1015 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1016 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1017 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1018 | break; |
1019 | ||
1020 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1021 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1022 | force |= scrolling (f); | |
4588ec20 JB |
1023 | |
1024 | /* Update the individual lines as needed. Do bottom line first. */ | |
1025 | ||
502b9b64 JB |
1026 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1027 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
1028 | |
1029 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1030 | if (FRAME_X_P (f)) |
4588ec20 | 1031 | { |
502b9b64 JB |
1032 | leftmost = downto = f->display.x->internal_border_width; |
1033 | if (desired_frame->enable[0]) | |
4588ec20 | 1034 | { |
502b9b64 JB |
1035 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1036 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
1037 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 1038 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1039 | current_frame->top_left_x[0] = leftmost; |
1040 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1041 | } |
1042 | } | |
1043 | #endif /* HAVE_X_WINDOWS */ | |
1044 | ||
1045 | /* Now update the rest of the lines. */ | |
502b9b64 | 1046 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1047 | { |
502b9b64 | 1048 | if (desired_frame->enable[i]) |
4588ec20 | 1049 | { |
b6a65ac2 | 1050 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1051 | { |
1052 | /* Flush out every so many lines. | |
1053 | Also flush out if likely to have more than 1k buffered | |
1054 | otherwise. I'm told that some telnet connections get | |
1055 | really screwed by more than 1k output at once. */ | |
1056 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1057 | if (outq > 900 | |
1058 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1059 | { | |
1060 | fflush (stdout); | |
1061 | if (preempt_count == 1) | |
1062 | { | |
a41f8bed JB |
1063 | #ifdef EMACS_OUTQSIZE |
1064 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1065 | /* Probably not a tty. Ignore the error and reset |
1066 | * the outq count. */ | |
1067 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1068 | #endif | |
1069 | outq *= 10; | |
4d9c0ca4 | 1070 | if (baud_rate >= outq) |
d88c2b9e | 1071 | sleep (outq / baud_rate); |
4588ec20 JB |
1072 | } |
1073 | } | |
1074 | if ((i - 1) % preempt_count == 0) | |
1075 | detect_input_pending (); | |
1076 | } | |
1077 | ||
502b9b64 | 1078 | update_line (f, i); |
4588ec20 | 1079 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1080 | if (FRAME_X_P (f)) |
4588ec20 | 1081 | { |
502b9b64 JB |
1082 | current_frame->top_left_y[i] = downto; |
1083 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1084 | } |
1085 | #endif /* HAVE_X_WINDOWS */ | |
1086 | } | |
1087 | ||
e5d77022 | 1088 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1089 | if (FRAME_X_P (f)) |
448fd7c0 | 1090 | downto += current_frame->pix_height[i]; |
e5d77022 | 1091 | #endif |
4588ec20 | 1092 | } |
502b9b64 | 1093 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1094 | |
1095 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1096 | if (!pause) | |
1097 | { | |
648fa17d JB |
1098 | if (cursor_in_echo_area |
1099 | && FRAME_HAS_MINIBUF_P (f)) | |
1113d9db | 1100 | { |
648fa17d JB |
1101 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1102 | int row, col; | |
1103 | ||
1104 | if (cursor_in_echo_area < 0) | |
1105 | { | |
1106 | row = top; | |
1107 | col = 0; | |
1108 | } | |
1113d9db | 1109 | else |
648fa17d JB |
1110 | { |
1111 | /* If the minibuffer is several lines high, find the last | |
1112 | line that has any text on it. */ | |
1113 | row = FRAME_HEIGHT (f); | |
1114 | do | |
1115 | { | |
1116 | row--; | |
1117 | if (current_frame->enable[row]) | |
1118 | col = current_frame->used[row]; | |
1119 | else | |
1120 | col = 0; | |
1121 | } | |
1122 | while (row > top && col == 0); | |
1123 | ||
1124 | if (col >= FRAME_WIDTH (f)) | |
1125 | { | |
1126 | col = 0; | |
1127 | if (row < FRAME_HEIGHT (f) - 1) | |
1128 | row++; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | cursor_to (row, col); | |
1113d9db | 1133 | } |
4588ec20 | 1134 | else |
502b9b64 JB |
1135 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1136 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1137 | } |
1138 | ||
502b9b64 | 1139 | update_end (f); |
4588ec20 JB |
1140 | |
1141 | if (termscript) | |
1142 | fflush (termscript); | |
1143 | fflush (stdout); | |
1144 | ||
1145 | /* Here if output is preempted because input is detected. */ | |
1146 | do_pause: | |
1147 | ||
502b9b64 | 1148 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1149 | display_completed = !pause; |
1150 | ||
502b9b64 | 1151 | bzero (desired_frame->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1152 | return pause; |
1153 | } | |
1154 | ||
1155 | /* Called when about to quit, to check for doing so | |
1156 | at an improper time. */ | |
1157 | ||
1158 | void | |
1159 | quit_error_check () | |
1160 | { | |
502b9b64 | 1161 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1162 | return; |
502b9b64 | 1163 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1164 | abort (); |
502b9b64 | 1165 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1166 | abort (); |
1167 | } | |
1168 | \f | |
1169 | /* Decide what insert/delete line to do, and do it */ | |
1170 | ||
1171 | extern void scrolling_1 (); | |
1172 | ||
502b9b64 JB |
1173 | scrolling (frame) |
1174 | FRAME_PTR frame; | |
4588ec20 JB |
1175 | { |
1176 | int unchanged_at_top, unchanged_at_bottom; | |
1177 | int window_size; | |
1178 | int changed_lines; | |
502b9b64 JB |
1179 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1180 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1181 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
4588ec20 | 1182 | register int i; |
502b9b64 JB |
1183 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1184 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1185 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1186 | |
1187 | /* Compute hash codes of all the lines. | |
1188 | Also calculate number of changed lines, | |
1189 | number of unchanged lines at the beginning, | |
1190 | and number of unchanged lines at the end. */ | |
1191 | ||
1192 | changed_lines = 0; | |
1193 | unchanged_at_top = 0; | |
502b9b64 JB |
1194 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1195 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1196 | { |
1197 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1198 | if (!current_frame->enable[i]) |
4588ec20 | 1199 | return 0; |
502b9b64 JB |
1200 | old_hash[i] = line_hash_code (current_frame, i); |
1201 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1202 | new_hash[i] = old_hash[i]; |
1203 | else | |
502b9b64 | 1204 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1205 | |
1206 | if (old_hash[i] != new_hash[i]) | |
1207 | { | |
1208 | changed_lines++; | |
502b9b64 | 1209 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1210 | } |
1211 | else if (i == unchanged_at_top) | |
1212 | unchanged_at_top++; | |
502b9b64 | 1213 | draw_cost[i] = line_draw_cost (desired_frame, i); |
4588ec20 JB |
1214 | } |
1215 | ||
1216 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1217 | if (changed_lines < baud_rate / 2400 | |
502b9b64 | 1218 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1219 | return 1; |
1220 | ||
502b9b64 | 1221 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1222 | - unchanged_at_bottom); |
1223 | ||
1224 | if (scroll_region_ok) | |
1225 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1226 | else if (memory_below_frame) |
4588ec20 JB |
1227 | free_at_end_vpos = -1; |
1228 | ||
1229 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1230 | current frame and desired frame, don't bother with i/d calc. */ |
4588ec20 JB |
1231 | if (window_size >= 18 && baud_rate > 2400 |
1232 | && (window_size >= | |
1233 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1234 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1235 | old_hash, new_hash, draw_cost))) |
1236 | return 0; | |
1237 | ||
502b9b64 | 1238 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 JB |
1239 | draw_cost + unchanged_at_top - 1, |
1240 | old_hash + unchanged_at_top - 1, | |
1241 | new_hash + unchanged_at_top - 1, | |
1242 | free_at_end_vpos - unchanged_at_top); | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | \f | |
1247 | /* Return the offset in its buffer of the character at location col, line | |
1248 | in the given window. */ | |
1249 | int | |
1250 | buffer_posn_from_coords (window, col, line) | |
1251 | struct window *window; | |
1252 | int col, line; | |
1253 | { | |
ef0fdbb1 | 1254 | int hscroll = XINT (window->hscroll); |
4588ec20 JB |
1255 | int window_left = XFASTINT (window->left); |
1256 | ||
1257 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1258 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1259 | window. */ | |
fa61c701 | 1260 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1261 | |
efb859b4 | 1262 | int startp = marker_position (window->start); |
4588ec20 JB |
1263 | |
1264 | /* Since compute_motion will only operate on the current buffer, | |
1265 | we need to save the old one and restore it when we're done. */ | |
1266 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1267 | struct position *posn; |
4588ec20 JB |
1268 | |
1269 | current_buffer = XBUFFER (window->buffer); | |
1270 | ||
502b9b64 JB |
1271 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1272 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1273 | the window, but it isn't maintained correctly, and I'm not even |
1274 | sure I will keep it. */ | |
1275 | posn = compute_motion (startp, 0, | |
1276 | (window == XWINDOW (minibuf_window) && startp == 1 | |
ef0fdbb1 KH |
1277 | ? minibuf_prompt_width : 0) |
1278 | + (hscroll ? 1 - hscroll : 0), | |
fb0f454a | 1279 | ZV, line, col, |
ef0fdbb1 | 1280 | window_width, hscroll, 0); |
4588ec20 JB |
1281 | |
1282 | current_buffer = old_current_buffer; | |
1283 | ||
502b9b64 | 1284 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1285 | to be *after* the newline, i.e. at the start of the next line. |
1286 | This is reasonable, but not really what we want. So if the | |
1287 | result is on a line below LINE, back it up one character. */ | |
1288 | if (posn->vpos > line) | |
1289 | return posn->bufpos - 1; | |
1290 | else | |
1291 | return posn->bufpos; | |
4588ec20 JB |
1292 | } |
1293 | \f | |
1294 | static int | |
1295 | count_blanks (r) | |
1296 | register GLYPH *r; | |
1297 | { | |
1298 | register GLYPH *p = r; | |
94aa5d2d RS |
1299 | while (*p++ == SPACEGLYPH); |
1300 | return p - r - 1; | |
4588ec20 JB |
1301 | } |
1302 | ||
1303 | static int | |
1304 | count_match (str1, str2) | |
1305 | GLYPH *str1, *str2; | |
1306 | { | |
1307 | register GLYPH *p1 = str1; | |
1308 | register GLYPH *p2 = str2; | |
1309 | while (*p1++ == *p2++); | |
1310 | return p1 - str1 - 1; | |
1311 | } | |
1312 | ||
1313 | /* Char insertion/deletion cost vector, from term.c */ | |
1314 | extern int *char_ins_del_vector; | |
1315 | ||
945807a3 | 1316 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1317 | |
1318 | static void | |
502b9b64 JB |
1319 | update_line (frame, vpos) |
1320 | register FRAME_PTR frame; | |
4588ec20 JB |
1321 | int vpos; |
1322 | { | |
1323 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1324 | int tem; | |
1325 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1326 | int save; | |
502b9b64 JB |
1327 | register struct frame_glyphs *current_frame |
1328 | = FRAME_CURRENT_GLYPHS (frame); | |
1329 | register struct frame_glyphs *desired_frame | |
1330 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1331 | |
502b9b64 JB |
1332 | if (desired_frame->highlight[vpos] |
1333 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1334 | { |
502b9b64 JB |
1335 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1336 | (current_frame->enable[vpos] ? | |
1337 | current_frame->used[vpos] : 0)); | |
1338 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1339 | } |
1340 | else | |
502b9b64 | 1341 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1342 | |
502b9b64 | 1343 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1344 | { |
1345 | olen = 0; | |
1346 | } | |
1347 | else | |
1348 | { | |
502b9b64 JB |
1349 | obody = current_frame->glyphs[vpos]; |
1350 | olen = current_frame->used[vpos]; | |
1351 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1352 | { |
1353 | if (!must_write_spaces) | |
1354 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1355 | olen--; | |
1356 | } | |
1357 | else | |
1358 | { | |
1359 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1360 | spaces all the way to the frame edge |
4588ec20 JB |
1361 | so that the reverse video extends all the way across. */ |
1362 | ||
502b9b64 | 1363 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1364 | obody[olen++] = SPACEGLYPH; |
1365 | } | |
1366 | } | |
1367 | ||
1368 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1369 | current_frame->enable[vpos] = 1; |
1370 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1371 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1372 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1373 | |
1374 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1375 | if (FRAME_X_P (frame)) |
4588ec20 | 1376 | { |
502b9b64 JB |
1377 | current_frame->pix_width[vpos] |
1378 | = current_frame->used[vpos] | |
1379 | * FONT_WIDTH (frame->display.x->font); | |
1380 | current_frame->pix_height[vpos] | |
1381 | = FONT_HEIGHT (frame->display.x->font); | |
4588ec20 JB |
1382 | } |
1383 | #endif /* HAVE_X_WINDOWS */ | |
1384 | ||
502b9b64 | 1385 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1386 | { |
1387 | nlen = 0; | |
1388 | goto just_erase; | |
1389 | } | |
1390 | ||
502b9b64 JB |
1391 | nbody = desired_frame->glyphs[vpos]; |
1392 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1393 | |
1394 | /* Pretend trailing spaces are not there at all, | |
1395 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1396 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1397 | { |
1398 | if (!must_write_spaces) | |
1399 | /* We know that the previous character byte contains 0. */ | |
1400 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1401 | nlen--; | |
1402 | } | |
1403 | else | |
1404 | { | |
1405 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1406 | all the way to the frame edge |
4588ec20 JB |
1407 | so that the reverse video extends all the way across. */ |
1408 | ||
502b9b64 | 1409 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1410 | nbody[nlen++] = SPACEGLYPH; |
1411 | } | |
1412 | ||
1413 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1414 | if (!char_ins_del_ok) | |
1415 | { | |
1416 | int i,j; | |
1417 | ||
76426794 RS |
1418 | #if 0 |
1419 | if (FRAME_X_P (frame)) | |
1420 | { | |
1421 | /* Under X, erase everything we are going to rewrite, | |
1422 | and rewrite everything from the first char that's changed. | |
1423 | This is part of supporting fonts like Courier | |
1424 | whose chars can overlap outside the char width. */ | |
1425 | for (i = 0; i < nlen; i++) | |
1426 | if (i >= olen || nbody[i] != obody[i]) | |
1427 | break; | |
1428 | ||
1429 | cursor_to (vpos, i); | |
1430 | if (i != olen) | |
1431 | clear_end_of_line (olen); | |
1432 | write_glyphs (nbody + i, nlen - i); | |
1433 | } | |
1434 | else | |
1435 | {} | |
1436 | #endif /* 0 */ | |
4588ec20 JB |
1437 | for (i = 0; i < nlen; i++) |
1438 | { | |
1439 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1440 | { | |
1441 | cursor_to (vpos, i); | |
1442 | for (j = 1; (i + j < nlen && | |
1443 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1444 | j++); | |
1445 | ||
1446 | /* Output this run of non-matching chars. */ | |
1447 | write_glyphs (nbody + i, j); | |
1448 | i += j - 1; | |
1449 | ||
1450 | /* Now find the next non-match. */ | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1455 | if (olen > nlen) | |
1456 | { | |
1457 | cursor_to (vpos, nlen); | |
1458 | clear_end_of_line (olen); | |
1459 | } | |
1460 | ||
502b9b64 JB |
1461 | /* Exchange contents between current_frame and new_frame. */ |
1462 | temp = desired_frame->glyphs[vpos]; | |
1463 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1464 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1465 | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | if (!olen) | |
1470 | { | |
502b9b64 | 1471 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1472 | ? 0 : count_blanks (nbody); |
1473 | if (nlen > nsp) | |
1474 | { | |
1475 | cursor_to (vpos, nsp); | |
1476 | write_glyphs (nbody + nsp, nlen - nsp); | |
1477 | } | |
1478 | ||
502b9b64 JB |
1479 | /* Exchange contents between current_frame and new_frame. */ |
1480 | temp = desired_frame->glyphs[vpos]; | |
1481 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1482 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1483 | |
1484 | return; | |
1485 | } | |
1486 | ||
1487 | obody[olen] = 1; | |
1488 | save = nbody[nlen]; | |
1489 | nbody[nlen] = 0; | |
1490 | ||
1491 | /* Compute number of leading blanks in old and new contents. */ | |
1492 | osp = count_blanks (obody); | |
502b9b64 | 1493 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1494 | nsp = count_blanks (nbody); |
1495 | else | |
1496 | nsp = 0; | |
1497 | ||
1498 | /* Compute number of matching chars starting with first nonblank. */ | |
1499 | begmatch = count_match (obody + osp, nbody + nsp); | |
1500 | ||
1501 | /* Spaces in new match implicit space past the end of old. */ | |
1502 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1503 | if (!must_write_spaces && osp + begmatch == olen) | |
1504 | { | |
1505 | np1 = nbody + nsp; | |
1506 | while (np1[begmatch] == SPACEGLYPH) | |
1507 | begmatch++; | |
1508 | } | |
1509 | ||
1510 | /* Avoid doing insert/delete char | |
1511 | just cause number of leading spaces differs | |
1512 | when the following text does not match. */ | |
1513 | if (begmatch == 0 && osp != nsp) | |
1514 | osp = nsp = min (osp, nsp); | |
1515 | ||
1516 | /* Find matching characters at end of line */ | |
1517 | op1 = obody + olen; | |
1518 | np1 = nbody + nlen; | |
1519 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1520 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1521 | { | |
1522 | op1--; | |
1523 | np1--; | |
1524 | } | |
1525 | endmatch = obody + olen - op1; | |
1526 | ||
1527 | /* Put correct value back in nbody[nlen]. | |
1528 | This is important because direct_output_for_insert | |
1529 | can write into the line at a later point. | |
1530 | If this screws up the zero at the end of the line, re-establish it. */ | |
1531 | nbody[nlen] = save; | |
1532 | obody[olen] = 0; | |
1533 | ||
1534 | /* tem gets the distance to insert or delete. | |
1535 | endmatch is how many characters we save by doing so. | |
1536 | Is it worth it? */ | |
1537 | ||
1538 | tem = (nlen - nsp) - (olen - osp); | |
1539 | if (endmatch && tem | |
502b9b64 | 1540 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1541 | endmatch = 0; |
1542 | ||
1543 | /* nsp - osp is the distance to insert or delete. | |
1544 | If that is nonzero, begmatch is known to be nonzero also. | |
1545 | begmatch + endmatch is how much we save by doing the ins/del. | |
1546 | Is it worth it? */ | |
1547 | ||
1548 | if (nsp != osp | |
1549 | && (!char_ins_del_ok | |
502b9b64 | 1550 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1551 | { |
1552 | begmatch = 0; | |
1553 | endmatch = 0; | |
1554 | osp = nsp = min (osp, nsp); | |
1555 | } | |
1556 | ||
1557 | /* Now go through the line, inserting, writing and | |
1558 | deleting as appropriate. */ | |
1559 | ||
1560 | if (osp > nsp) | |
1561 | { | |
1562 | cursor_to (vpos, nsp); | |
1563 | delete_glyphs (osp - nsp); | |
1564 | } | |
1565 | else if (nsp > osp) | |
1566 | { | |
1567 | /* If going to delete chars later in line | |
1568 | and insert earlier in the line, | |
1569 | must delete first to avoid losing data in the insert */ | |
1570 | if (endmatch && nlen < olen + nsp - osp) | |
1571 | { | |
1572 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1573 | delete_glyphs (olen + nsp - osp - nlen); | |
1574 | olen = nlen - (nsp - osp); | |
1575 | } | |
1576 | cursor_to (vpos, osp); | |
1577 | insert_glyphs ((char *)0, nsp - osp); | |
1578 | } | |
1579 | olen += nsp - osp; | |
1580 | ||
1581 | tem = nsp + begmatch + endmatch; | |
1582 | if (nlen != tem || olen != tem) | |
1583 | { | |
1584 | cursor_to (vpos, nsp + begmatch); | |
1585 | if (!endmatch || nlen == olen) | |
1586 | { | |
1587 | /* If new text being written reaches right margin, | |
1588 | there is no need to do clear-to-eol at the end. | |
1589 | (and it would not be safe, since cursor is not | |
1590 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1591 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1592 | olen = 0; |
1593 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1594 | ||
1595 | #ifdef obsolete | |
1596 | ||
1597 | /* the following code loses disastrously if tem == nlen. | |
1598 | Rather than trying to fix that case, I am trying the simpler | |
1599 | solution found above. */ | |
1600 | ||
1601 | /* If the text reaches to the right margin, | |
1602 | it will lose one way or another (depending on AutoWrap) | |
1603 | to clear to end of line after outputting all the text. | |
1604 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1605 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1606 | { |
1607 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1608 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1609 | clear_end_of_line (olen); | |
1610 | olen = 0; /* Don't let it be cleared again later */ | |
1611 | write_glyphs (nbody + nlen - 1, 1); | |
1612 | } | |
1613 | else | |
1614 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1615 | #endif /* OBSOLETE */ | |
1616 | ||
1617 | } | |
1618 | else if (nlen > olen) | |
1619 | { | |
1620 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1621 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1622 | olen = nlen; | |
1623 | } | |
1624 | else if (olen > nlen) | |
1625 | { | |
1626 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1627 | delete_glyphs (olen - nlen); | |
1628 | olen = nlen; | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | just_erase: | |
1633 | /* If any unerased characters remain after the new line, erase them. */ | |
1634 | if (olen > nlen) | |
1635 | { | |
1636 | cursor_to (vpos, nlen); | |
1637 | clear_end_of_line (olen); | |
1638 | } | |
1639 | ||
502b9b64 JB |
1640 | /* Exchange contents between current_frame and new_frame. */ |
1641 | temp = desired_frame->glyphs[vpos]; | |
1642 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1643 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1644 | } |
1645 | \f | |
1646 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1647 | 1, 1, "FOpen termscript file: ", | |
1648 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1649 | FILE = nil means just close any termscript file currently open.") | |
1650 | (file) | |
1651 | Lisp_Object file; | |
1652 | { | |
1653 | if (termscript != 0) fclose (termscript); | |
1654 | termscript = 0; | |
1655 | ||
efb859b4 | 1656 | if (! NILP (file)) |
4588ec20 JB |
1657 | { |
1658 | file = Fexpand_file_name (file, Qnil); | |
1659 | termscript = fopen (XSTRING (file)->data, "w"); | |
1660 | if (termscript == 0) | |
1661 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1662 | } | |
1663 | return Qnil; | |
1664 | } | |
1665 | \f | |
1666 | ||
1667 | #ifdef SIGWINCH | |
efb859b4 | 1668 | SIGTYPE |
4588ec20 JB |
1669 | window_change_signal () |
1670 | { | |
1671 | int width, height; | |
1672 | extern int errno; | |
1673 | int old_errno = errno; | |
1674 | ||
502b9b64 | 1675 | get_frame_size (&width, &height); |
4588ec20 | 1676 | |
502b9b64 JB |
1677 | /* The frame size change obviously applies to a termcap-controlled |
1678 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 1679 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 1680 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
1681 | but don't reallocate the data structures now. Let that be done |
1682 | later outside of the signal handler. */ | |
1683 | ||
1684 | { | |
35f56f96 | 1685 | Lisp_Object tail, frame; |
4588ec20 | 1686 | |
35f56f96 | 1687 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1688 | { |
35f56f96 | 1689 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 1690 | { |
35f56f96 | 1691 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
1692 | break; |
1693 | } | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | signal (SIGWINCH, window_change_signal); | |
1698 | errno = old_errno; | |
1699 | } | |
1700 | #endif /* SIGWINCH */ | |
1701 | ||
1702 | ||
502b9b64 | 1703 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
1704 | |
1705 | do_pending_window_change () | |
1706 | { | |
1707 | /* If window_change_signal should have run before, run it now. */ | |
1708 | while (delayed_size_change) | |
1709 | { | |
35f56f96 | 1710 | Lisp_Object tail, frame; |
4588ec20 JB |
1711 | |
1712 | delayed_size_change = 0; | |
1713 | ||
35f56f96 | 1714 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1715 | { |
35f56f96 JB |
1716 | FRAME_PTR f = XFRAME (frame); |
1717 | ||
502b9b64 JB |
1718 | int height = FRAME_NEW_HEIGHT (f); |
1719 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 1720 | |
08f7aa3e | 1721 | if (height != 0 || width != 0) |
b6a65ac2 | 1722 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
1723 | } |
1724 | } | |
1725 | } | |
1726 | ||
1727 | ||
502b9b64 | 1728 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 1729 | indicate no change is to take place. |
4588ec20 | 1730 | |
b6a65ac2 JB |
1731 | If DELAY is non-zero, then assume we're being called from a signal |
1732 | handler, and queue the change for later - perhaps the next | |
1733 | redisplay. Since this tries to resize windows, we can't call it | |
1734 | from a signal handler. */ | |
1735 | ||
1736 | change_frame_size (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 1737 | register FRAME_PTR frame; |
b6a65ac2 | 1738 | int newheight, newwidth, pretend; |
4588ec20 JB |
1739 | { |
1740 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 1741 | if (delay) |
4588ec20 | 1742 | { |
b6a65ac2 | 1743 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 1744 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
1745 | delayed_size_change = 1; |
1746 | return; | |
1747 | } | |
1748 | ||
502b9b64 JB |
1749 | /* This size-change overrides any pending one for this frame. */ |
1750 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
1751 | FRAME_NEW_WIDTH (frame) = 0; |
1752 | ||
08f7aa3e | 1753 | /* If an argument is zero, set it to the current value. */ |
b6a65ac2 JB |
1754 | newheight || (newheight = FRAME_HEIGHT (frame)); |
1755 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 1756 | |
b6a65ac2 JB |
1757 | /* Round up to the smallest acceptable size. */ |
1758 | check_frame_size (frame, &newheight, &newwidth); | |
1759 | ||
1760 | /* If we're not changing the frame size, quit now. */ | |
1761 | if (newheight == FRAME_HEIGHT (frame) | |
1762 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
1763 | return; |
1764 | ||
b6a65ac2 | 1765 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 1766 | { |
b6a65ac2 | 1767 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 1768 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 1769 | { |
502b9b64 JB |
1770 | /* Frame has both root and minibuffer. */ |
1771 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 1772 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
502b9b64 | 1773 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
b6a65ac2 | 1774 | = newheight - 1; |
502b9b64 | 1775 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
1776 | } |
1777 | else | |
502b9b64 | 1778 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
1779 | set_window_height (FRAME_ROOT_WINDOW (frame), |
1780 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
1781 | |
1782 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
1783 | FrameRows = newheight; | |
4588ec20 JB |
1784 | |
1785 | #if 0 | |
502b9b64 | 1786 | if (frame->output_method == output_termcap) |
4588ec20 | 1787 | { |
b6a65ac2 | 1788 | frame_height = newheight; |
4588ec20 | 1789 | if (!pretend) |
b6a65ac2 | 1790 | FrameRows = newheight; |
4588ec20 JB |
1791 | } |
1792 | #endif | |
1793 | } | |
1794 | ||
b6a65ac2 | 1795 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 1796 | { |
502b9b64 | 1797 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 1798 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 1799 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 1800 | |
b6a65ac2 | 1801 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 1802 | FrameCols = newwidth; |
4588ec20 | 1803 | #if 0 |
502b9b64 | 1804 | if (frame->output_method == output_termcap) |
4588ec20 | 1805 | { |
502b9b64 | 1806 | frame_width = newwidth; |
4588ec20 | 1807 | if (!pretend) |
502b9b64 | 1808 | FrameCols = newwidth; |
4588ec20 JB |
1809 | } |
1810 | #endif | |
1811 | } | |
1812 | ||
b6a65ac2 JB |
1813 | FRAME_HEIGHT (frame) = newheight; |
1814 | FRAME_WIDTH (frame) = newwidth; | |
1815 | ||
502b9b64 JB |
1816 | remake_frame_glyphs (frame); |
1817 | calculate_costs (frame); | |
4588ec20 JB |
1818 | } |
1819 | \f | |
1820 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1821 | Ssend_string_to_terminal, 1, 1, 0, | |
1822 | "Send STRING to the terminal without alteration.\n\ | |
1823 | Control characters in STRING will have terminal-dependent effects.") | |
1824 | (str) | |
1825 | Lisp_Object str; | |
1826 | { | |
1827 | CHECK_STRING (str, 0); | |
1828 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1829 | fflush (stdout); | |
1830 | if (termscript) | |
1831 | { | |
1832 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1833 | fflush (termscript); | |
1834 | } | |
1835 | return Qnil; | |
1836 | } | |
1837 | ||
1838 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1839 | "Beep, or flash the screen.\n\ | |
1840 | Also, unless an argument is given,\n\ | |
1841 | terminate any keyboard macro currently executing.") | |
1842 | (arg) | |
1843 | Lisp_Object arg; | |
1844 | { | |
efb859b4 | 1845 | if (!NILP (arg)) |
4588ec20 | 1846 | { |
7fa788da RS |
1847 | if (noninteractive) |
1848 | putchar (07); | |
1849 | else | |
1850 | ring_bell (); | |
4588ec20 JB |
1851 | fflush (stdout); |
1852 | } | |
1853 | else | |
1854 | bitch_at_user (); | |
1855 | ||
1856 | return Qnil; | |
1857 | } | |
1858 | ||
1859 | bitch_at_user () | |
1860 | { | |
1861 | if (noninteractive) | |
1862 | putchar (07); | |
1863 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1864 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1865 | else | |
1866 | ring_bell (); | |
1867 | fflush (stdout); | |
1868 | } | |
1869 | ||
1870 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 1871 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
1872 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
1873 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
1874 | additional wait period, in milliseconds; this may be useful if your\n\ | |
1875 | Emacs was built without floating point support.\n\ | |
1876 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
1877 | (seconds, milliseconds) |
1878 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 1879 | { |
767229f8 | 1880 | int sec, usec; |
4588ec20 | 1881 | |
767229f8 JB |
1882 | if (NILP (milliseconds)) |
1883 | XSET (milliseconds, Lisp_Int, 0); | |
1884 | else | |
1885 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
1886 | usec = XINT (milliseconds) * 1000; |
1887 | ||
1888 | #ifdef LISP_FLOAT_TYPE | |
1889 | { | |
1890 | double duration = extract_float (seconds); | |
1891 | sec = (int) duration; | |
1892 | usec += (duration - sec) * 1000000; | |
1893 | } | |
1894 | #else | |
1895 | CHECK_NUMBER (seconds, 0); | |
1896 | sec = XINT (seconds); | |
1897 | #endif | |
4588ec20 | 1898 | |
a41f8bed | 1899 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
1900 | if (sec == 0 && usec != 0) |
1901 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 1902 | #endif |
767229f8 JB |
1903 | |
1904 | /* Assure that 0 <= usec < 1000000. */ | |
1905 | if (usec < 0) | |
1906 | { | |
1907 | /* We can't rely on the rounding being correct if user is negative. */ | |
1908 | if (-1000000 < usec) | |
1909 | sec--, usec += 1000000; | |
1910 | else | |
1911 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 1912 | } |
767229f8 JB |
1913 | else |
1914 | sec += usec / 1000000, usec %= 1000000; | |
1915 | ||
5c48f0da | 1916 | if (sec <= 0) |
767229f8 | 1917 | return Qnil; |
4588ec20 | 1918 | |
f76475ad JB |
1919 | { |
1920 | Lisp_Object zero; | |
1921 | ||
1922 | XFASTINT (zero) = 0; | |
1923 | wait_reading_process_input (sec, usec, zero, 0); | |
1924 | } | |
d1af74e9 | 1925 | |
767229f8 JB |
1926 | /* We should always have wait_reading_process_input; we have a dummy |
1927 | implementation for systems which don't support subprocesses. */ | |
1928 | #if 0 | |
1929 | /* No wait_reading_process_input */ | |
4588ec20 JB |
1930 | immediate_quit = 1; |
1931 | QUIT; | |
1932 | ||
1933 | #ifdef VMS | |
1934 | sys_sleep (sec); | |
1935 | #else /* not VMS */ | |
1936 | /* The reason this is done this way | |
1937 | (rather than defined (H_S) && defined (H_T)) | |
1938 | is because the VMS preprocessor doesn't grok `defined' */ | |
1939 | #ifdef HAVE_SELECT | |
a41f8bed JB |
1940 | EMACS_GET_TIME (end_time); |
1941 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 1942 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 1943 | |
4588ec20 JB |
1944 | while (1) |
1945 | { | |
a41f8bed JB |
1946 | EMACS_GET_TIME (timeout); |
1947 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1948 | if (EMACS_TIME_NEG_P (timeout) | |
1949 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
1950 | break; |
1951 | } | |
4588ec20 JB |
1952 | #else /* not HAVE_SELECT */ |
1953 | sleep (sec); | |
1954 | #endif /* HAVE_SELECT */ | |
1955 | #endif /* not VMS */ | |
1956 | ||
1957 | immediate_quit = 0; | |
1958 | #endif /* no subprocesses */ | |
1959 | ||
1960 | return Qnil; | |
1961 | } | |
1962 | ||
f76475ad JB |
1963 | /* This is just like wait_reading_process_input, except that |
1964 | it does the redisplay. | |
1965 | ||
ea0d86af RS |
1966 | It's also much like Fsit_for, except that it can be used for |
1967 | waiting for input as well. One differnce is that sit_for | |
1968 | does not call prepare_menu_bars; Fsit_for does call that. */ | |
4588ec20 | 1969 | |
f76475ad JB |
1970 | Lisp_Object |
1971 | sit_for (sec, usec, reading, display) | |
1972 | int sec, usec, reading, display; | |
1973 | { | |
1974 | Lisp_Object read_kbd; | |
4588ec20 JB |
1975 | |
1976 | if (detect_input_pending ()) | |
1977 | return Qnil; | |
4588ec20 | 1978 | |
f76475ad JB |
1979 | if (display) |
1980 | redisplay_preserve_echo_area (); | |
4588ec20 | 1981 | |
dfdb645c JB |
1982 | if (sec == 0 && usec == 0) |
1983 | return Qt; | |
1984 | ||
4588ec20 | 1985 | #ifdef SIGIO |
8fc798e9 | 1986 | gobble_input (0); |
f76475ad JB |
1987 | #endif |
1988 | ||
1989 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
1990 | wait_reading_process_input (sec, usec, read_kbd, display); | |
1991 | ||
d1af74e9 | 1992 | |
500ab754 JB |
1993 | /* wait_reading_process_input should always be available now; it is |
1994 | simulated in a simple way on systems that don't support | |
1995 | subprocesses. */ | |
1996 | #if 0 | |
1997 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
1998 | immediate_quit = 1; |
1999 | QUIT; | |
2000 | ||
2001 | waitchannels = 1; | |
2002 | #ifdef VMS | |
f76475ad | 2003 | input_wait_timeout (XINT (arg)); |
4588ec20 | 2004 | #else /* not VMS */ |
d1af74e9 JB |
2005 | #ifndef HAVE_TIMEVAL |
2006 | timeout_sec = sec; | |
2007 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
2008 | #else /* HAVE_TIMEVAL */ | |
2009 | timeout.tv_sec = sec; | |
2010 | timeout.tv_usec = usec; | |
4588ec20 | 2011 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 2012 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
2013 | #endif /* not VMS */ |
2014 | ||
2015 | immediate_quit = 0; | |
d1af74e9 | 2016 | #endif |
4588ec20 JB |
2017 | |
2018 | return detect_input_pending () ? Qnil : Qt; | |
2019 | } | |
2020 | ||
f76475ad | 2021 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2022 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2023 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2024 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2025 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2026 | Emacs was built without floating point support.\n\ | |
2027 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
f76475ad JB |
2028 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
2029 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
2030 | if input is available before it starts.\n\ | |
2031 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2032 | (seconds, milliseconds, nodisp) |
2033 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2034 | { |
767229f8 | 2035 | int sec, usec; |
f76475ad | 2036 | |
767229f8 JB |
2037 | if (NILP (milliseconds)) |
2038 | XSET (milliseconds, Lisp_Int, 0); | |
2039 | else | |
2040 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2041 | usec = XINT (milliseconds) * 1000; |
2042 | ||
2043 | #ifdef LISP_FLOAT_TYPE | |
2044 | { | |
2045 | double duration = extract_float (seconds); | |
2046 | sec = (int) duration; | |
2047 | usec += (duration - sec) * 1000000; | |
2048 | } | |
2049 | #else | |
2050 | CHECK_NUMBER (seconds, 0); | |
2051 | sec = XINT (seconds); | |
2052 | #endif | |
f76475ad | 2053 | |
f76475ad | 2054 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2055 | if (usec != 0 && sec == 0) |
2056 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2057 | #endif |
f76475ad | 2058 | |
ea0d86af RS |
2059 | if (NILP (nodisp)) |
2060 | prepare_menu_bars (); | |
f76475ad JB |
2061 | return sit_for (sec, usec, 0, NILP (nodisp)); |
2062 | } | |
4588ec20 JB |
2063 | \f |
2064 | char *terminal_type; | |
2065 | ||
2066 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2067 | /* Determine terminal type and set terminal_driver */ | |
2068 | /* Then invoke its decoding routine to set up variables | |
2069 | in the terminal package */ | |
2070 | ||
2071 | init_display () | |
2072 | { | |
2073 | #ifdef HAVE_X_WINDOWS | |
2074 | extern int display_arg; | |
2075 | #endif | |
2076 | ||
2077 | meta_key = 0; | |
2078 | inverse_video = 0; | |
2079 | cursor_in_echo_area = 0; | |
2080 | terminal_type = (char *) 0; | |
2081 | ||
1315c181 JB |
2082 | /* Now is the time to initialize this; it's used by init_sys_modes |
2083 | during startup. */ | |
2084 | Vwindow_system = Qnil; | |
4588ec20 | 2085 | |
1315c181 JB |
2086 | /* If the user wants to use a window system, we shouldn't bother |
2087 | initializing the terminal. This is especially important when the | |
2088 | terminal is so dumb that emacs gives up before and doesn't bother | |
2089 | using the window system. | |
4588ec20 | 2090 | |
1315c181 JB |
2091 | If the DISPLAY environment variable is set, try to use X, and die |
2092 | with an error message if that doesn't work. */ | |
4588ec20 JB |
2093 | |
2094 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2095 | if (! display_arg) |
2096 | { | |
2097 | #ifdef VMS | |
5de9f849 | 2098 | display_arg = (getenv ("DECW$DISPLAY") != 0); |
d460af17 | 2099 | #else |
5de9f849 | 2100 | display_arg = (getenv ("DISPLAY") != 0); |
d460af17 | 2101 | #endif |
f040093a | 2102 | } |
d460af17 JB |
2103 | |
2104 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2105 | { |
2106 | Vwindow_system = intern ("x"); | |
2107 | #ifdef HAVE_X11 | |
2108 | Vwindow_system_version = make_number (11); | |
2109 | #else | |
2110 | Vwindow_system_version = make_number (10); | |
2111 | #endif | |
2112 | return; | |
2113 | } | |
2114 | #endif /* HAVE_X_WINDOWS */ | |
2115 | ||
2116 | /* If no window system has been specified, try to use the terminal. */ | |
2117 | if (! isatty (0)) | |
2118 | { | |
2119 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2120 | exit (1); | |
2121 | } | |
2122 | ||
2123 | /* Look at the TERM variable */ | |
2124 | terminal_type = (char *) getenv ("TERM"); | |
2125 | if (!terminal_type) | |
2126 | { | |
2127 | #ifdef VMS | |
2128 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2129 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2130 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2131 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2132 | #else | |
2133 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2134 | #endif | |
2135 | exit (1); | |
2136 | } | |
2137 | ||
2138 | #ifdef VMS | |
2139 | /* VMS DCL tends to upcase things, so downcase term type. | |
2140 | Hardly any uppercase letters in terminal types; should be none. */ | |
2141 | { | |
2142 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2143 | char *p; | |
2144 | ||
2145 | strcpy (new, terminal_type); | |
2146 | ||
2147 | for (p = new; *p; p++) | |
2148 | if (isupper (*p)) | |
2149 | *p = tolower (*p); | |
2150 | ||
2151 | terminal_type = new; | |
2152 | } | |
2153 | #endif | |
2154 | ||
2155 | term_init (terminal_type); | |
2156 | ||
502b9b64 JB |
2157 | remake_frame_glyphs (selected_frame); |
2158 | calculate_costs (selected_frame); | |
4588ec20 JB |
2159 | |
2160 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2161 | FRAME_CURSOR_X (selected_frame) = 0; |
2162 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2163 | |
2164 | #ifdef SIGWINCH | |
2165 | #ifndef CANNOT_DUMP | |
2166 | if (initialized) | |
2167 | #endif /* CANNOT_DUMP */ | |
2168 | signal (SIGWINCH, window_change_signal); | |
2169 | #endif /* SIGWINCH */ | |
2170 | } | |
2171 | \f | |
2172 | syms_of_display () | |
2173 | { | |
502b9b64 JB |
2174 | #ifdef MULTI_FRAME |
2175 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2176 | #endif |
2177 | defsubr (&Sredraw_display); | |
2178 | defsubr (&Sopen_termscript); | |
2179 | defsubr (&Sding); | |
2180 | defsubr (&Ssit_for); | |
2181 | defsubr (&Ssleep_for); | |
2182 | defsubr (&Ssend_string_to_terminal); | |
2183 | ||
2184 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2185 | "The output baud rate of the terminal.\n\ | |
2186 | On most systems, changing this value will affect the amount of padding\n\ | |
2187 | and the other strategic decisions made during redisplay."); | |
2188 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2189 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2190 | This means everything is in inverse video which otherwise would not be."); |
2191 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2192 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2193 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2194 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2195 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2196 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2197 | It is up to you to set this variable if your terminal can do that."); |
2198 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2199 | "A symbol naming the window-system under which Emacs is running\n\ | |
2200 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2201 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2202 | "The version number of the window system in use.\n\ | |
2203 | For X windows, this is 10 or 11."); | |
2204 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2205 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2206 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2207 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2208 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2209 | Each element can be:\n\ | |
2210 | integer: a glyph code which this glyph is an alias for.\n\ | |
2211 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2212 | nil: this glyph mod 256 is char code to output,\n\ | |
2213 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2214 | Vglyph_table = Qnil; | |
2215 | ||
2216 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2217 | "Display table to use for buffers that specify none.\n\ | |
2218 | See `buffer-display-table' for more information."); | |
2219 | Vstandard_display_table = Qnil; | |
2220 | ||
2221 | /* Initialize `window-system', unless init_display already decided it. */ | |
2222 | #ifdef CANNOT_DUMP | |
2223 | if (noninteractive) | |
2224 | #endif | |
2225 | { | |
2226 | Vwindow_system = Qnil; | |
2227 | Vwindow_system_version = Qnil; | |
2228 | } | |
2229 | } |