Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
4a2f9c6a | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 1998 |
ba704fd4 | 3 | Free Software Foundation, Inc. |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 9 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
4588ec20 JB |
21 | |
22 | ||
23 | #include <signal.h> | |
24 | ||
18160b98 | 25 | #include <config.h> |
565620a5 RS |
26 | |
27 | #include <stdio.h> | |
4588ec20 JB |
28 | #include <ctype.h> |
29 | ||
dfcf069d AS |
30 | #ifdef HAVE_UNISTD_H |
31 | #include <unistd.h> | |
32 | #endif | |
33 | ||
47099d6f | 34 | #include "lisp.h" |
4588ec20 JB |
35 | #include "termchar.h" |
36 | #include "termopts.h" | |
3be08bea | 37 | #include "termhooks.h" |
a0879520 | 38 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
39 | #include "dispextern.h" |
40 | #include "cm.h" | |
4588ec20 | 41 | #include "buffer.h" |
24e86043 | 42 | #include "charset.h" |
502b9b64 | 43 | #include "frame.h" |
4588ec20 JB |
44 | #include "window.h" |
45 | #include "commands.h" | |
46 | #include "disptab.h" | |
47 | #include "indent.h" | |
d169fe39 | 48 | #include "intervals.h" |
97cf50e7 | 49 | #include "blockinput.h" |
dfcf069d AS |
50 | #include "process.h" |
51 | #include "keyboard.h" | |
4588ec20 | 52 | |
24e86043 KH |
53 | /* I don't know why DEC Alpha OSF1 fail to compile this file if we |
54 | include the following file. */ | |
55 | /* #include "systty.h" */ | |
58b2bb63 | 56 | #include "syssignal.h" |
a41f8bed | 57 | |
4588ec20 JB |
58 | #ifdef HAVE_X_WINDOWS |
59 | #include "xterm.h" | |
60 | #endif /* HAVE_X_WINDOWS */ | |
61 | ||
fd2e066a GV |
62 | #ifdef HAVE_NTGUI |
63 | #include "w32term.h" | |
64 | #endif /* HAVE_NTGUI */ | |
65 | ||
6cbd1643 RS |
66 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
67 | #include "systime.h" | |
68 | ||
3883a901 RS |
69 | #include <errno.h> |
70 | ||
4588ec20 JB |
71 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
72 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
ceafe86b KH |
73 | #define minmax(floor, val, ceil) \ |
74 | ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val)) | |
4588ec20 | 75 | |
4588ec20 JB |
76 | /* Get number of chars of output now in the buffer of a stdio stream. |
77 | This ought to be built in in stdio, but it isn't. | |
78 | Some s- files override this because their stdio internals differ. */ | |
e3271ae5 | 79 | #ifdef __GNU_LIBRARY__ |
097c2824 RM |
80 | /* The s- file might have overridden the definition with one that works for |
81 | the system's C library. But we are using the GNU C library, so this is | |
82 | the right definition for every system. */ | |
3883a901 RS |
83 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
84 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
85 | #else | |
cb5558ff | 86 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 87 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
88 | #endif |
89 | #else /* not __GNU_LIBRARY__ */ | |
cb5558ff | 90 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
91 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
92 | #endif | |
e3271ae5 | 93 | #endif |
4588ec20 | 94 | |
45140e01 RS |
95 | static void change_frame_size_1 (); |
96 | ||
a41f8bed | 97 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 98 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 99 | |
502b9b64 | 100 | int frame_garbaged; |
4588ec20 JB |
101 | |
102 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
103 | ||
104 | int display_completed; | |
105 | ||
106 | /* Lisp variable visible-bell; enables use of screen-flash | |
107 | instead of audible bell. */ | |
108 | ||
109 | int visible_bell; | |
110 | ||
502b9b64 | 111 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
112 | |
113 | int inverse_video; | |
114 | ||
115 | /* Line speed of the terminal. */ | |
116 | ||
117 | int baud_rate; | |
118 | ||
119 | /* nil or a symbol naming the window system under which emacs is | |
120 | running ('x is the only current possibility). */ | |
121 | ||
122 | Lisp_Object Vwindow_system; | |
123 | ||
124 | /* Version number of X windows: 10, 11 or nil. */ | |
125 | Lisp_Object Vwindow_system_version; | |
126 | ||
127 | /* Vector of glyph definitions. Indexed by glyph number, | |
128 | the contents are a string which is how to output the glyph. | |
129 | ||
130 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
131 | as a character code. */ | |
132 | ||
133 | Lisp_Object Vglyph_table; | |
134 | ||
135 | /* Display table to use for vectors that don't specify their own. */ | |
136 | ||
137 | Lisp_Object Vstandard_display_table; | |
138 | ||
139 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
140 | so put cursor on minibuffer after the prompt. |
141 | positive means at end of text in echo area; | |
142 | negative means at beginning of line. */ | |
4588ec20 | 143 | int cursor_in_echo_area; |
9cda4f7c RS |
144 | |
145 | Lisp_Object Qdisplay_table; | |
4588ec20 | 146 | \f |
502b9b64 | 147 | /* The currently selected frame. |
87485d6f MW |
148 | In a single-frame version, this variable always holds the address of |
149 | the_only_frame. */ | |
4588ec20 | 150 | |
502b9b64 | 151 | FRAME_PTR selected_frame; |
4588ec20 | 152 | |
502b9b64 JB |
153 | /* A frame which is not just a minibuffer, or 0 if there are no such |
154 | frames. This is usually the most recent such frame that was | |
87485d6f MW |
155 | selected. In a single-frame version, this variable always holds |
156 | the address of the_only_frame. */ | |
502b9b64 | 157 | FRAME_PTR last_nonminibuf_frame; |
e5d77022 | 158 | |
4588ec20 | 159 | /* This is a vector, made larger whenever it isn't large enough, |
502b9b64 JB |
160 | which is used inside `update_frame' to hold the old contents |
161 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
162 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
163 | /* Length of vector currently allocated. */ |
164 | int ophys_lines_length; | |
165 | ||
166 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
167 | ||
168 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
169 | ||
4588ec20 | 170 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 171 | \f |
502b9b64 JB |
172 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
173 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
174 | (frame) | |
175 | Lisp_Object frame; | |
4588ec20 | 176 | { |
502b9b64 | 177 | FRAME_PTR f; |
4588ec20 | 178 | |
502b9b64 JB |
179 | CHECK_LIVE_FRAME (frame, 0); |
180 | f = XFRAME (frame); | |
6d4279ab KH |
181 | |
182 | /* Erase the frame and its glyph records--if it has any records. | |
183 | It may have none, in the case of the terminal frame | |
184 | that initially exists but is never used | |
185 | when Emacs is using a window system. */ | |
186 | if (FRAME_CURRENT_GLYPHS (f) != 0) | |
187 | { | |
188 | update_begin (f); | |
189 | if (FRAME_MSDOS_P (f)) | |
190 | set_terminal_modes (); | |
191 | clear_frame (); | |
192 | clear_frame_records (f); | |
193 | update_end (f); | |
194 | fflush (stdout); | |
195 | } | |
196 | ||
4588ec20 JB |
197 | windows_or_buffers_changed++; |
198 | /* Mark all windows as INaccurate, | |
199 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
200 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
201 | f->garbaged = 0; | |
4588ec20 JB |
202 | return Qnil; |
203 | } | |
204 | ||
dfcf069d | 205 | void |
502b9b64 JB |
206 | redraw_frame (f) |
207 | FRAME_PTR f; | |
4588ec20 | 208 | { |
502b9b64 | 209 | Lisp_Object frame; |
e9c9a718 | 210 | XSETFRAME (frame, f); |
502b9b64 | 211 | Fredraw_frame (frame); |
4588ec20 JB |
212 | } |
213 | ||
35f56f96 JB |
214 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", |
215 | "Clear and redisplay all visible frames.") | |
216 | () | |
217 | { | |
218 | Lisp_Object tail, frame; | |
219 | ||
220 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 221 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
222 | Fredraw_frame (frame); |
223 | ||
224 | return Qnil; | |
225 | } | |
226 | ||
9223a96a RS |
227 | /* This is used when frame_garbaged is set. |
228 | Redraw the individual frames marked as garbaged. */ | |
229 | ||
230 | void | |
231 | redraw_garbaged_frames () | |
232 | { | |
233 | Lisp_Object tail, frame; | |
234 | ||
235 | FOR_EACH_FRAME (tail, frame) | |
236 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
237 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
238 | Fredraw_frame (frame); | |
239 | } | |
240 | ||
4588ec20 | 241 | \f |
502b9b64 JB |
242 | static struct frame_glyphs * |
243 | make_frame_glyphs (frame, empty) | |
244 | register FRAME_PTR frame; | |
4588ec20 JB |
245 | int empty; |
246 | { | |
247 | register int i; | |
dfcf069d AS |
248 | register int width = FRAME_WINDOW_WIDTH (frame); |
249 | register int height = FRAME_HEIGHT (frame); | |
60a8948a RS |
250 | register struct frame_glyphs *new |
251 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 252 | |
502b9b64 | 253 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
254 | new->height = height; |
255 | new->width = width; | |
256 | new->used = (int *) xmalloc (height * sizeof (int)); | |
257 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
60a8948a | 258 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
4588ec20 JB |
259 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
260 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
261 | bzero (new->enable, height * sizeof (char)); | |
262 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
263 | ||
fd2e066a GV |
264 | #ifdef HAVE_WINDOW_SYSTEM |
265 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 266 | { |
4588ec20 JB |
267 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
268 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
269 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
270 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 271 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 | 272 | } |
fd2e066a | 273 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
274 | |
275 | if (empty) | |
276 | { | |
277 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 278 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 | 279 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
d52bad65 | 280 | unsigned int total_charstarts = (width + 2) * sizeof (int); |
4588ec20 JB |
281 | |
282 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
283 | bzero (new->total_contents, total_glyphs); | |
d52bad65 RS |
284 | |
285 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
aba5d0f4 | 286 | bzero (new->total_charstarts, total_charstarts); |
4588ec20 JB |
287 | } |
288 | else | |
289 | { | |
290 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
291 | ||
292 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
293 | bzero (new->total_contents, total_glyphs); | |
294 | for (i = 0; i < height; i++) | |
295 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
60a8948a RS |
296 | |
297 | if (!FRAME_TERMCAP_P (frame)) | |
298 | { | |
299 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); | |
300 | ||
301 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
302 | bzero (new->total_charstarts, total_charstarts); | |
303 | for (i = 0; i < height; i++) | |
304 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; | |
305 | } | |
306 | else | |
307 | { | |
308 | /* Without a window system, we don't really need charstarts. | |
309 | So use a small amount of space to make enough data structure | |
310 | to prevent crashes in display_text_line. */ | |
311 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); | |
312 | for (i = 0; i < height; i++) | |
313 | new->charstarts[i] = new->total_charstarts; | |
314 | } | |
4588ec20 JB |
315 | } |
316 | ||
317 | return new; | |
318 | } | |
319 | ||
05233a7d | 320 | void |
502b9b64 JB |
321 | free_frame_glyphs (frame, glyphs) |
322 | FRAME_PTR frame; | |
323 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
324 | { |
325 | if (glyphs->total_contents) | |
9ac0d9e0 | 326 | xfree (glyphs->total_contents); |
60a8948a RS |
327 | if (glyphs->total_charstarts) |
328 | xfree (glyphs->total_charstarts); | |
4588ec20 | 329 | |
9ac0d9e0 JB |
330 | xfree (glyphs->used); |
331 | xfree (glyphs->glyphs); | |
332 | xfree (glyphs->highlight); | |
333 | xfree (glyphs->enable); | |
334 | xfree (glyphs->bufp); | |
60a8948a RS |
335 | if (glyphs->charstarts) |
336 | xfree (glyphs->charstarts); | |
4588ec20 | 337 | |
fd2e066a GV |
338 | #ifdef HAVE_WINDOW_SYSTEM |
339 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 340 | { |
9ac0d9e0 JB |
341 | xfree (glyphs->top_left_x); |
342 | xfree (glyphs->top_left_y); | |
343 | xfree (glyphs->pix_width); | |
344 | xfree (glyphs->pix_height); | |
345 | xfree (glyphs->max_ascent); | |
4588ec20 | 346 | } |
fd2e066a | 347 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 348 | |
9ac0d9e0 | 349 | xfree (glyphs); |
4588ec20 JB |
350 | } |
351 | ||
45140e01 | 352 | void |
502b9b64 JB |
353 | remake_frame_glyphs (frame) |
354 | FRAME_PTR frame; | |
4588ec20 | 355 | { |
502b9b64 JB |
356 | if (FRAME_CURRENT_GLYPHS (frame)) |
357 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
358 | if (FRAME_DESIRED_GLYPHS (frame)) | |
359 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
360 | if (FRAME_TEMP_GLYPHS (frame)) | |
361 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
362 | ||
363 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
364 | { |
365 | /* Reallocate the frame's message buffer; remember that | |
366 | echo_area_glyphs may be pointing here. */ | |
367 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
368 | ||
369 | FRAME_MESSAGE_BUF (frame) | |
370 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
24e86043 | 371 | FRAME_MESSAGE_BUF_SIZE (frame) + 1); |
832a0726 JB |
372 | |
373 | if (echo_area_glyphs == old_message_buf) | |
374 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
375 | if (previous_echo_glyphs == old_message_buf) | |
376 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
377 | } | |
4588ec20 | 378 | else |
502b9b64 | 379 | FRAME_MESSAGE_BUF (frame) |
24e86043 | 380 | = (char *) xmalloc (FRAME_MESSAGE_BUF_SIZE (frame) + 1); |
4588ec20 | 381 | |
502b9b64 JB |
382 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
383 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
384 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
8a376b3b | 385 | if (FRAME_WINDOW_P (frame) || frame == selected_frame) |
45140e01 | 386 | SET_FRAME_GARBAGED (frame); |
4588ec20 JB |
387 | } |
388 | \f | |
502b9b64 | 389 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
390 | |
391 | static int | |
392 | line_hash_code (m, vpos) | |
502b9b64 | 393 | register struct frame_glyphs *m; |
4588ec20 JB |
394 | int vpos; |
395 | { | |
396 | register GLYPH *body, *end; | |
397 | register int h = 0; | |
398 | ||
399 | if (!m->enable[vpos]) | |
400 | return 0; | |
401 | ||
94aa5d2d | 402 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
403 | so as to encourage scrolling to leave them in place. */ |
404 | if (m->highlight[vpos]) | |
405 | return -1; | |
406 | ||
407 | body = m->glyphs[vpos]; | |
408 | ||
409 | if (must_write_spaces) | |
410 | while (1) | |
411 | { | |
412 | GLYPH g = *body++; | |
413 | ||
414 | if (g == 0) | |
415 | break; | |
416 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
417 | } | |
418 | else | |
419 | while (1) | |
420 | { | |
421 | GLYPH g = *body++; | |
422 | ||
423 | if (g == 0) | |
424 | break; | |
425 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
426 | } | |
427 | ||
428 | if (h) | |
429 | return h; | |
430 | return 1; | |
431 | } | |
432 | ||
433 | /* Return number of characters in line in M at vpos VPOS, | |
434 | except don't count leading and trailing spaces | |
435 | unless the terminal requires those to be explicitly output. */ | |
436 | ||
437 | static unsigned int | |
438 | line_draw_cost (m, vpos) | |
502b9b64 | 439 | struct frame_glyphs *m; |
4588ec20 JB |
440 | int vpos; |
441 | { | |
442 | register GLYPH *beg = m->glyphs[vpos]; | |
443 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
444 | register int i; | |
445 | register int tlen = GLYPH_TABLE_LENGTH; | |
446 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
447 | ||
448 | /* Ignore trailing and leading spaces if we can. */ | |
449 | if (!must_write_spaces) | |
450 | { | |
451 | while ((end != beg) && (*end == SPACEGLYPH)) | |
452 | --end; | |
453 | if (end == beg) | |
454 | return (0); /* All blank line. */ | |
455 | ||
456 | while (*beg == SPACEGLYPH) | |
457 | ++beg; | |
458 | } | |
459 | ||
460 | /* If we don't have a glyph-table, each glyph is one character, | |
461 | so return the number of glyphs. */ | |
462 | if (tbase == 0) | |
463 | return end - beg; | |
464 | ||
465 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
466 | i = 0; | |
467 | while ((beg <= end) && *beg) | |
468 | { | |
469 | register GLYPH g = *beg++; | |
470 | ||
471 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
472 | i += 1; | |
473 | else | |
474 | i += GLYPH_LENGTH (tbase, g); | |
475 | } | |
476 | return i; | |
477 | } | |
478 | \f | |
479 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
480 | ||
481 | The only other interface into redisplay is through setting | |
502b9b64 JB |
482 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
483 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
484 | |
485 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
486 | ||
dfcf069d | 487 | void |
502b9b64 | 488 | cancel_line (vpos, frame) |
4588ec20 | 489 | int vpos; |
502b9b64 | 490 | register FRAME_PTR frame; |
4588ec20 | 491 | { |
502b9b64 | 492 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
493 | } |
494 | ||
dfcf069d | 495 | void |
502b9b64 JB |
496 | clear_frame_records (frame) |
497 | register FRAME_PTR frame; | |
4588ec20 | 498 | { |
502b9b64 | 499 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
500 | } |
501 | ||
836d2cde RS |
502 | /* Clear out all display lines for a coming redisplay. */ |
503 | ||
504 | void | |
505 | init_desired_glyphs (frame) | |
506 | register FRAME_PTR frame; | |
507 | { | |
508 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
509 | int vpos; | |
510 | int height = FRAME_HEIGHT (frame); | |
511 | ||
512 | for (vpos = 0; vpos < height; vpos++) | |
513 | desired_glyphs->enable[vpos] = 0; | |
514 | } | |
515 | ||
4588ec20 JB |
516 | /* Prepare to display on line VPOS starting at HPOS within it. */ |
517 | ||
518 | void | |
502b9b64 JB |
519 | get_display_line (frame, vpos, hpos) |
520 | register FRAME_PTR frame; | |
4588ec20 JB |
521 | int vpos; |
522 | register int hpos; | |
523 | { | |
502b9b64 JB |
524 | register struct frame_glyphs *glyphs; |
525 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
526 | register GLYPH *p; |
527 | ||
7c3c72ec | 528 | if (vpos < 0) |
4588ec20 JB |
529 | abort (); |
530 | ||
4588ec20 JB |
531 | if (! desired_glyphs->enable[vpos]) |
532 | { | |
533 | desired_glyphs->used[vpos] = 0; | |
534 | desired_glyphs->highlight[vpos] = 0; | |
535 | desired_glyphs->enable[vpos] = 1; | |
536 | } | |
537 | ||
538 | if (hpos > desired_glyphs->used[vpos]) | |
539 | { | |
540 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
541 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
542 | ||
543 | desired_glyphs->used[vpos] = hpos; | |
544 | while (g != end) | |
545 | *g++ = SPACEGLYPH; | |
546 | } | |
547 | } | |
548 | ||
549 | /* Like bcopy except never gets confused by overlap. */ | |
550 | ||
551 | void | |
552 | safe_bcopy (from, to, size) | |
553 | char *from, *to; | |
554 | int size; | |
555 | { | |
b5c685f4 | 556 | if (size <= 0 || from == to) |
4588ec20 JB |
557 | return; |
558 | ||
b5c685f4 JB |
559 | /* If the source and destination don't overlap, then bcopy can |
560 | handle it. If they do overlap, but the destination is lower in | |
561 | memory than the source, we'll assume bcopy can handle that. */ | |
562 | if (to < from || from + size <= to) | |
563 | bcopy (from, to, size); | |
564 | ||
565 | /* Otherwise, we'll copy from the end. */ | |
566 | else | |
4588ec20 | 567 | { |
b5c685f4 JB |
568 | register char *endf = from + size; |
569 | register char *endt = to + size; | |
4588ec20 JB |
570 | |
571 | /* If TO - FROM is large, then we should break the copy into | |
572 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
573 | TO - FROM is small, then the bcopy function call overhead | |
574 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
575 | anywhere. Since I don't think the obvious copy loop is too |
576 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
577 | if (to - from < 64) |
578 | { | |
579 | do | |
580 | *--endt = *--endf; | |
581 | while (endf != from); | |
582 | } | |
583 | else | |
584 | { | |
b5c685f4 | 585 | for (;;) |
4588ec20 JB |
586 | { |
587 | endt -= (to - from); | |
588 | endf -= (to - from); | |
589 | ||
b5c685f4 JB |
590 | if (endt < to) |
591 | break; | |
592 | ||
4588ec20 JB |
593 | bcopy (endf, endt, to - from); |
594 | } | |
b5c685f4 JB |
595 | |
596 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
597 | little left over. The amount left over is |
598 | (endt + (to - from)) - to, which is endt - from. */ | |
599 | bcopy (from, to, endt - from); | |
600 | } | |
601 | } | |
4588ec20 JB |
602 | } |
603 | ||
98038dc0 | 604 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
605 | DISTANCE may be negative. */ |
606 | ||
607 | static void | |
608 | rotate_vector (vector, size, distance) | |
609 | char *vector; | |
610 | int size; | |
611 | int distance; | |
612 | { | |
613 | char *temp = (char *) alloca (size); | |
614 | ||
615 | if (distance < 0) | |
616 | distance += size; | |
617 | ||
618 | bcopy (vector, temp + distance, size - distance); | |
619 | bcopy (vector + size - distance, temp, distance); | |
620 | bcopy (temp, vector, size); | |
621 | } | |
622 | ||
623 | /* Scroll lines from vpos FROM up to but not including vpos END | |
624 | down by AMOUNT lines (AMOUNT may be negative). | |
625 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
626 | ||
627 | int | |
d52bad65 | 628 | scroll_frame_lines (frame, from, end, amount, newpos) |
502b9b64 | 629 | register FRAME_PTR frame; |
d52bad65 | 630 | int from, end, amount, newpos; |
4588ec20 JB |
631 | { |
632 | register int i; | |
502b9b64 JB |
633 | register struct frame_glyphs *current_frame |
634 | = FRAME_CURRENT_GLYPHS (frame); | |
d52bad65 | 635 | int pos_adjust; |
29ec5d84 | 636 | int width = FRAME_WINDOW_WIDTH (frame); |
4588ec20 JB |
637 | |
638 | if (!line_ins_del_ok) | |
639 | return 0; | |
640 | ||
641 | if (amount == 0) | |
642 | return 1; | |
643 | ||
644 | if (amount > 0) | |
645 | { | |
502b9b64 | 646 | update_begin (frame); |
4588ec20 JB |
647 | set_terminal_window (end + amount); |
648 | if (!scroll_region_ok) | |
649 | ins_del_lines (end, -amount); | |
650 | ins_del_lines (from, amount); | |
651 | set_terminal_window (0); | |
652 | ||
502b9b64 | 653 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
654 | sizeof (GLYPH *) * (end + amount - from), |
655 | amount * sizeof (GLYPH *)); | |
656 | ||
60a8948a | 657 | rotate_vector (current_frame->charstarts + from, |
d52bad65 RS |
658 | sizeof (int *) * (end + amount - from), |
659 | amount * sizeof (int *)); | |
660 | ||
23b0200c RS |
661 | safe_bcopy (current_frame->used + from, |
662 | current_frame->used + from + amount, | |
663 | (end - from) * sizeof current_frame->used[0]); | |
664 | ||
665 | safe_bcopy (current_frame->highlight + from, | |
666 | current_frame->highlight + from + amount, | |
667 | (end - from) * sizeof current_frame->highlight[0]); | |
668 | ||
669 | safe_bcopy (current_frame->enable + from, | |
670 | current_frame->enable + from + amount, | |
671 | (end - from) * sizeof current_frame->enable[0]); | |
672 | ||
d52bad65 RS |
673 | /* Adjust the lines by an amount |
674 | that puts the first of them at NEWPOS. */ | |
23b0200c | 675 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
676 | |
677 | /* Offset each char position in the charstarts lines we moved | |
678 | by pos_adjust. */ | |
23b0200c | 679 | for (i = from + amount; i < end + amount; i++) |
60a8948a | 680 | { |
d52bad65 | 681 | int *line = current_frame->charstarts[i]; |
60a8948a | 682 | int col; |
23b0200c RS |
683 | for (col = 0; col < width; col++) |
684 | if (line[col] > 0) | |
685 | line[col] += pos_adjust; | |
60a8948a | 686 | } |
23b0200c | 687 | for (i = from; i < from + amount; i++) |
60a8948a | 688 | { |
d52bad65 | 689 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
690 | int col; |
691 | line[0] = -1; | |
23b0200c | 692 | for (col = 0; col < width; col++) |
60a8948a RS |
693 | line[col] = 0; |
694 | } | |
695 | ||
4588ec20 JB |
696 | /* Mark the lines made empty by scrolling as enabled, empty and |
697 | normal video. */ | |
502b9b64 JB |
698 | bzero (current_frame->used + from, |
699 | amount * sizeof current_frame->used[0]); | |
700 | bzero (current_frame->highlight + from, | |
701 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
702 | for (i = from; i < from + amount; i++) |
703 | { | |
502b9b64 | 704 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 705 | current_frame->charstarts[i][0] = -1; |
502b9b64 | 706 | current_frame->enable[i] = 1; |
4588ec20 JB |
707 | } |
708 | ||
502b9b64 JB |
709 | safe_bcopy (current_frame->bufp + from, |
710 | current_frame->bufp + from + amount, | |
711 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 | 712 | |
fd2e066a GV |
713 | #ifdef HAVE_WINDOW_SYSTEM |
714 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 715 | { |
502b9b64 JB |
716 | safe_bcopy (current_frame->top_left_x + from, |
717 | current_frame->top_left_x + from + amount, | |
718 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 719 | |
502b9b64 JB |
720 | safe_bcopy (current_frame->top_left_y + from, |
721 | current_frame->top_left_y + from + amount, | |
722 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 723 | |
502b9b64 JB |
724 | safe_bcopy (current_frame->pix_width + from, |
725 | current_frame->pix_width + from + amount, | |
726 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 727 | |
502b9b64 JB |
728 | safe_bcopy (current_frame->pix_height + from, |
729 | current_frame->pix_height + from + amount, | |
730 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
731 | |
732 | safe_bcopy (current_frame->max_ascent + from, | |
733 | current_frame->max_ascent + from + amount, | |
734 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 | 735 | } |
fd2e066a | 736 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 737 | |
502b9b64 | 738 | update_end (frame); |
4588ec20 JB |
739 | } |
740 | if (amount < 0) | |
741 | { | |
502b9b64 | 742 | update_begin (frame); |
4588ec20 JB |
743 | set_terminal_window (end); |
744 | ins_del_lines (from + amount, amount); | |
745 | if (!scroll_region_ok) | |
746 | ins_del_lines (end + amount, -amount); | |
747 | set_terminal_window (0); | |
748 | ||
502b9b64 | 749 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
750 | sizeof (GLYPH *) * (end - from - amount), |
751 | amount * sizeof (GLYPH *)); | |
752 | ||
60a8948a | 753 | rotate_vector (current_frame->charstarts + from + amount, |
d52bad65 RS |
754 | sizeof (int *) * (end - from - amount), |
755 | amount * sizeof (int *)); | |
756 | ||
23b0200c RS |
757 | safe_bcopy (current_frame->used + from, |
758 | current_frame->used + from + amount, | |
759 | (end - from) * sizeof current_frame->used[0]); | |
760 | ||
761 | safe_bcopy (current_frame->highlight + from, | |
762 | current_frame->highlight + from + amount, | |
763 | (end - from) * sizeof current_frame->highlight[0]); | |
764 | ||
765 | safe_bcopy (current_frame->enable + from, | |
766 | current_frame->enable + from + amount, | |
767 | (end - from) * sizeof current_frame->enable[0]); | |
768 | ||
d52bad65 RS |
769 | /* Adjust the lines by an amount |
770 | that puts the first of them at NEWPOS. */ | |
23b0200c | 771 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
772 | |
773 | /* Offset each char position in the charstarts lines we moved | |
774 | by pos_adjust. */ | |
775 | for (i = from + amount; i < end + amount; i++) | |
776 | { | |
d52bad65 | 777 | int *line = current_frame->charstarts[i]; |
60a8948a | 778 | int col; |
23b0200c RS |
779 | for (col = 0; col < width; col++) |
780 | if (line[col] > 0) | |
781 | line[col] += pos_adjust; | |
60a8948a | 782 | } |
23b0200c | 783 | for (i = end + amount; i < end; i++) |
60a8948a | 784 | { |
d52bad65 | 785 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
786 | int col; |
787 | line[0] = -1; | |
23b0200c | 788 | for (col = 0; col < width; col++) |
60a8948a RS |
789 | line[col] = 0; |
790 | } | |
791 | ||
4588ec20 JB |
792 | /* Mark the lines made empty by scrolling as enabled, empty and |
793 | normal video. */ | |
502b9b64 JB |
794 | bzero (current_frame->used + end + amount, |
795 | - amount * sizeof current_frame->used[0]); | |
796 | bzero (current_frame->highlight + end + amount, | |
797 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
798 | for (i = end + amount; i < end; i++) |
799 | { | |
502b9b64 | 800 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 801 | current_frame->charstarts[i][0] = 0; |
502b9b64 | 802 | current_frame->enable[i] = 1; |
4588ec20 JB |
803 | } |
804 | ||
502b9b64 JB |
805 | safe_bcopy (current_frame->bufp + from, |
806 | current_frame->bufp + from + amount, | |
807 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 | 808 | |
fd2e066a GV |
809 | #ifdef HAVE_WINDOW_SYSTEM |
810 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 811 | { |
502b9b64 JB |
812 | safe_bcopy (current_frame->top_left_x + from, |
813 | current_frame->top_left_x + from + amount, | |
814 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 815 | |
502b9b64 JB |
816 | safe_bcopy (current_frame->top_left_y + from, |
817 | current_frame->top_left_y + from + amount, | |
818 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 819 | |
502b9b64 JB |
820 | safe_bcopy (current_frame->pix_width + from, |
821 | current_frame->pix_width + from + amount, | |
822 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 823 | |
502b9b64 JB |
824 | safe_bcopy (current_frame->pix_height + from, |
825 | current_frame->pix_height + from + amount, | |
826 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
827 | |
828 | safe_bcopy (current_frame->max_ascent + from, | |
829 | current_frame->max_ascent + from + amount, | |
830 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 | 831 | } |
fd2e066a | 832 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 833 | |
502b9b64 | 834 | update_end (frame); |
4588ec20 JB |
835 | } |
836 | return 1; | |
837 | } | |
838 | \f | |
502b9b64 | 839 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 840 | copy all the columns that W does not occupy |
502b9b64 JB |
841 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
842 | so that update_frame will not change those columns. */ | |
4588ec20 | 843 | |
dfcf069d | 844 | void |
4588ec20 JB |
845 | preserve_other_columns (w) |
846 | struct window *w; | |
847 | { | |
848 | register int vpos; | |
502b9b64 JB |
849 | register struct frame_glyphs *current_frame, *desired_frame; |
850 | register FRAME_PTR frame = XFRAME (w->frame); | |
9bfd4456 RS |
851 | int start = WINDOW_LEFT_MARGIN (w); |
852 | int end = WINDOW_RIGHT_EDGE (w); | |
4588ec20 JB |
853 | int bot = XFASTINT (w->top) + XFASTINT (w->height); |
854 | ||
502b9b64 JB |
855 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
856 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
857 | |
858 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
859 | { | |
502b9b64 | 860 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
861 | { |
862 | if (start > 0) | |
863 | { | |
864 | int len; | |
865 | ||
502b9b64 | 866 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 | 867 | desired_frame->glyphs[vpos], |
4b34bd81 | 868 | start * sizeof (current_frame->glyphs[vpos][0])); |
60a8948a RS |
869 | bcopy (current_frame->charstarts[vpos], |
870 | desired_frame->charstarts[vpos], | |
4b34bd81 | 871 | start * sizeof (current_frame->charstarts[vpos][0])); |
502b9b64 JB |
872 | len = min (start, current_frame->used[vpos]); |
873 | if (desired_frame->used[vpos] < len) | |
874 | desired_frame->used[vpos] = len; | |
4588ec20 | 875 | } |
502b9b64 JB |
876 | if (current_frame->used[vpos] > end |
877 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 878 | { |
502b9b64 | 879 | while (desired_frame->used[vpos] < end) |
60a8948a RS |
880 | { |
881 | int used = desired_frame->used[vpos]++; | |
882 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; | |
883 | desired_frame->glyphs[vpos][used] = 0; | |
884 | } | |
502b9b64 JB |
885 | bcopy (current_frame->glyphs[vpos] + end, |
886 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 | 887 | ((current_frame->used[vpos] - end) |
4b34bd81 | 888 | * sizeof (current_frame->glyphs[vpos][0]))); |
60a8948a RS |
889 | bcopy (current_frame->charstarts[vpos] + end, |
890 | desired_frame->charstarts[vpos] + end, | |
891 | ((current_frame->used[vpos] - end) | |
4b34bd81 | 892 | * sizeof (current_frame->charstarts[vpos][0]))); |
502b9b64 | 893 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
894 | } |
895 | } | |
896 | } | |
897 | } | |
898 | \f | |
899 | #if 0 | |
900 | ||
502b9b64 | 901 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 902 | copy all the columns that w does occupy |
502b9b64 JB |
903 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
904 | so that update_frame will not change those columns. | |
4588ec20 JB |
905 | |
906 | Have not been able to figure out how to use this correctly. */ | |
907 | ||
908 | preserve_my_columns (w) | |
909 | struct window *w; | |
910 | { | |
911 | register int vpos, fin; | |
502b9b64 JB |
912 | register struct frame_glyphs *l1, *l2; |
913 | register FRAME_PTR frame = XFRAME (w->frame); | |
9bfd4456 RS |
914 | int start = WINDOW_LEFT_MARGIN (w); |
915 | int end = WINDOW_RIGHT_EDGE (w); | |
4588ec20 JB |
916 | int bot = XFASTINT (w->top) + XFASTINT (w->height); |
917 | ||
918 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
919 | { | |
502b9b64 JB |
920 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
921 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
922 | { |
923 | if (l2->length > start && l1->length < l2->length) | |
924 | { | |
925 | fin = l2->length; | |
926 | if (fin > end) fin = end; | |
927 | while (l1->length < start) | |
928 | l1->body[l1->length++] = ' '; | |
929 | bcopy (l2->body + start, l1->body + start, fin - start); | |
930 | l1->length = fin; | |
931 | } | |
932 | } | |
933 | } | |
934 | } | |
935 | ||
936 | #endif | |
937 | \f | |
b64b3980 | 938 | /* Adjust by ADJUST the charstart values in window W |
23b0200c | 939 | after vpos VPOS, which counts relative to the frame |
b64b3980 RS |
940 | (not relative to W itself). */ |
941 | ||
942 | void | |
943 | adjust_window_charstarts (w, vpos, adjust) | |
944 | struct window *w; | |
945 | int vpos; | |
946 | int adjust; | |
947 | { | |
9bfd4456 | 948 | int left = WINDOW_LEFT_MARGIN (w); |
b64b3980 | 949 | int top = XFASTINT (w->top); |
23b0200c RS |
950 | int right = left + window_internal_width (w); |
951 | int bottom = top + window_internal_height (w); | |
b64b3980 RS |
952 | int i; |
953 | ||
23b0200c | 954 | for (i = vpos + 1; i < bottom; i++) |
b64b3980 RS |
955 | { |
956 | int *charstart | |
957 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; | |
958 | int j; | |
959 | for (j = left; j < right; j++) | |
960 | if (charstart[j] > 0) | |
961 | charstart[j] += adjust; | |
962 | } | |
963 | } | |
23b0200c | 964 | |
352f1545 RS |
965 | /* Check the charstarts values in the area of window W |
966 | for internal consistency. We cannot check that they are "right"; | |
967 | we can only look for something nonsensical. */ | |
968 | ||
dfcf069d | 969 | void |
23b0200c RS |
970 | verify_charstarts (w) |
971 | struct window *w; | |
972 | { | |
973 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
974 | int i; | |
975 | int top = XFASTINT (w->top); | |
976 | int bottom = top + window_internal_height (w); | |
9bfd4456 | 977 | int left = WINDOW_LEFT_MARGIN (w); |
23b0200c RS |
978 | int right = left + window_internal_width (w); |
979 | int next_line; | |
352f1545 RS |
980 | int truncate = (XINT (w->hscroll) |
981 | || (truncate_partial_width_windows | |
9bfd4456 | 982 | && !WINDOW_FULL_WIDTH_P (w)) |
352f1545 | 983 | || !NILP (XBUFFER (w->buffer)->truncate_lines)); |
23b0200c RS |
984 | |
985 | for (i = top; i < bottom; i++) | |
986 | { | |
987 | int j; | |
988 | int last; | |
352f1545 | 989 | int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; |
23b0200c RS |
990 | |
991 | if (i != top) | |
352f1545 RS |
992 | { |
993 | if (truncate) | |
994 | { | |
995 | /* If we are truncating lines, allow a jump | |
996 | in charstarts from one line to the next. */ | |
997 | if (charstart[left] < next_line) | |
998 | abort (); | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | if (charstart[left] != next_line) | |
1003 | abort (); | |
1004 | } | |
1005 | } | |
23b0200c RS |
1006 | |
1007 | for (j = left; j < right; j++) | |
1008 | if (charstart[j] > 0) | |
1009 | last = charstart[j]; | |
2e8907d3 RS |
1010 | /* Record where the next line should start. */ |
1011 | next_line = last; | |
1012 | if (BUF_ZV (XBUFFER (w->buffer)) != last) | |
1013 | { | |
1014 | /* If there's a newline between the two lines, count that. */ | |
1015 | int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); | |
1016 | if (endchar == '\n') | |
1017 | next_line++; | |
1018 | } | |
23b0200c RS |
1019 | } |
1020 | } | |
b64b3980 | 1021 | \f |
4588ec20 JB |
1022 | /* On discovering that the redisplay for a window was no good, |
1023 | cancel the columns of that window, so that when the window is | |
1024 | displayed over again get_display_line will not complain. */ | |
1025 | ||
dfcf069d | 1026 | void |
4588ec20 JB |
1027 | cancel_my_columns (w) |
1028 | struct window *w; | |
1029 | { | |
1030 | register int vpos; | |
60a8948a RS |
1031 | register struct frame_glyphs *desired_glyphs |
1032 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
9bfd4456 | 1033 | register int start = WINDOW_LEFT_MARGIN (w); |
4588ec20 JB |
1034 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); |
1035 | ||
1036 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
1037 | if (desired_glyphs->enable[vpos] | |
1038 | && desired_glyphs->used[vpos] >= start) | |
1039 | desired_glyphs->used[vpos] = start; | |
1040 | } | |
1041 | \f | |
502b9b64 | 1042 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
1043 | the necessary output for one change in the buffer. |
1044 | They may return 0 meaning nothing was done if anything is difficult, | |
1045 | or 1 meaning the output was performed properly. | |
502b9b64 | 1046 | They assume that the frame was up to date before the buffer |
94aa5d2d | 1047 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
1048 | see command_loop_1 where these are called. */ |
1049 | ||
1050 | int | |
1051 | direct_output_for_insert (g) | |
1052 | int g; | |
1053 | { | |
502b9b64 JB |
1054 | register FRAME_PTR frame = selected_frame; |
1055 | register struct frame_glyphs *current_frame | |
1056 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
1057 | |
1058 | #ifndef COMPILER_REGISTER_BUG | |
1059 | register | |
1060 | #endif /* COMPILER_REGISTER_BUG */ | |
1061 | struct window *w = XWINDOW (selected_window); | |
1062 | #ifndef COMPILER_REGISTER_BUG | |
1063 | register | |
1064 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1065 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
1066 | #ifndef COMPILER_REGISTER_BUG |
1067 | register | |
1068 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1069 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 1070 | |
fa61c701 | 1071 | /* Give up if about to continue line. */ |
9bfd4456 | 1072 | if (hpos >= WINDOW_LEFT_MARGIN (w) + window_internal_width (w) - 1 |
fa61c701 | 1073 | |
4588ec20 | 1074 | /* Avoid losing if cursor is in invisible text off left margin */ |
9bfd4456 | 1075 | || (XINT (w->hscroll) && hpos == WINDOW_LEFT_MARGIN (w)) |
4588ec20 JB |
1076 | |
1077 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 1078 | || cursor_in_echo_area |
502b9b64 JB |
1079 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
1080 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 1081 | |
502b9b64 | 1082 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
1083 | || !display_completed |
1084 | ||
1085 | /* Give up if buffer appears in two places. */ | |
1086 | || buffer_shared > 1 | |
1087 | ||
d169fe39 RS |
1088 | #ifdef USE_TEXT_PROPERTIES |
1089 | /* Intervals have already been adjusted, point is after the | |
1090 | character that was just inserted. */ | |
ef4d2f9e | 1091 | /* Give up if character is invisible. */ |
d169fe39 RS |
1092 | /* Give up if character has a face property. |
1093 | At the moment we only lose at end of line or end of buffer | |
1094 | and only with faces that have some background */ | |
1095 | /* Instead of wasting time, give up if character has any text properties */ | |
6ec8bbd2 | 1096 | || ! NILP (Ftext_properties_at (make_number (PT - 1), Qnil)) |
d169fe39 RS |
1097 | #endif |
1098 | ||
4588ec20 JB |
1099 | /* Give up if w is minibuffer and a message is being displayed there */ |
1100 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
1101 | return 0; | |
1102 | ||
517b2e01 | 1103 | { |
19dff8dc | 1104 | int face = 0; |
87485d6f | 1105 | #ifdef HAVE_FACES |
517b2e01 | 1106 | int dummy; |
19dff8dc | 1107 | |
93e54836 | 1108 | if (FRAME_WINDOW_P (frame) || FRAME_MSDOS_P (frame)) |
6ec8bbd2 | 1109 | face = compute_char_face (frame, w, PT - 1, -1, -1, &dummy, PT, 0); |
517b2e01 | 1110 | #endif |
a1c3de84 | 1111 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
6ec8bbd2 | 1112 | current_frame->charstarts[vpos][hpos] = PT - 1; |
839c7dfb | 1113 | /* Record the entry for after the newly inserted character. */ |
6ec8bbd2 | 1114 | current_frame->charstarts[vpos][hpos + 1] = PT; |
b64b3980 | 1115 | adjust_window_charstarts (w, vpos, 1); |
517b2e01 | 1116 | } |
4588ec20 JB |
1117 | unchanged_modified = MODIFF; |
1118 | beg_unchanged = GPT - BEG; | |
6ec8bbd2 | 1119 | XSETFASTINT (w->last_point, PT); |
4673d3e5 | 1120 | XSETFASTINT (w->last_point_x, hpos + 1); |
a5d8b611 | 1121 | XSETFASTINT (w->last_modified, MODIFF); |
663b3df3 | 1122 | XSETFASTINT (w->last_overlay_modified, OVERLAY_MODIFF); |
4588ec20 JB |
1123 | |
1124 | reassert_line_highlight (0, vpos); | |
502b9b64 | 1125 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 1126 | fflush (stdout); |
502b9b64 JB |
1127 | ++FRAME_CURSOR_X (frame); |
1128 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 1129 | { |
502b9b64 JB |
1130 | current_frame->used[vpos] = hpos + 1; |
1131 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
1132 | } |
1133 | ||
1134 | return 1; | |
1135 | } | |
1136 | ||
1137 | int | |
1138 | direct_output_forward_char (n) | |
1139 | int n; | |
1140 | { | |
502b9b64 | 1141 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 1142 | register struct window *w = XWINDOW (selected_window); |
254277e1 | 1143 | Lisp_Object position; |
ea0d86af RS |
1144 | int hpos = FRAME_CURSOR_X (frame); |
1145 | ||
1146 | /* Give up if in truncated text at end of line. */ | |
ba704fd4 | 1147 | /* This check is not redundant. */ |
9bfd4456 | 1148 | if (hpos >= WINDOW_LEFT_MARGIN (w) + window_internal_width (w) - 1) |
ea0d86af | 1149 | return 0; |
24e86043 KH |
1150 | |
1151 | /* Give up if the buffer's direction is reversed (i.e. right-to-left). */ | |
1152 | if (!NILP (XBUFFER(w->buffer)->direction_reversed)) | |
1153 | return 0; | |
ea0d86af | 1154 | |
a9764248 JB |
1155 | /* Avoid losing if cursor is in invisible text off left margin |
1156 | or about to go off either side of window. */ | |
9bfd4456 | 1157 | if ((FRAME_CURSOR_X (frame) == WINDOW_LEFT_MARGIN (w) |
a9764248 JB |
1158 | && (XINT (w->hscroll) || n < 0)) |
1159 | || (n > 0 | |
24e86043 KH |
1160 | && (FRAME_CURSOR_X (frame) + 1 |
1161 | >= XFASTINT (w->left) + window_internal_width (w) - 1)) | |
1162 | /* BUG FIX: Added "XFASTINT (w->left)". Without this, | |
1163 | direct_output_forward_char() always fails on "the right" | |
1164 | window. */ | |
648fa17d | 1165 | || cursor_in_echo_area) |
4588ec20 | 1166 | return 0; |
15874c59 | 1167 | |
de83c314 RS |
1168 | /* Can't use direct output if highlighting a region. */ |
1169 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1170 | return 0; | |
1171 | ||
15874c59 KH |
1172 | /* Can't use direct output at an overlay boundary; it might have |
1173 | before-string or after-string properties. */ | |
1174 | if (overlay_touches_p (PT) || overlay_touches_p (PT - n)) | |
1175 | return 0; | |
1176 | ||
d169fe39 RS |
1177 | #ifdef USE_TEXT_PROPERTIES |
1178 | /* Don't use direct output next to an invisible character | |
1179 | since we might need to do something special. */ | |
1180 | ||
6ec8bbd2 | 1181 | XSETFASTINT (position, PT); |
2f24f5ac | 1182 | if (XFASTINT (position) < ZV |
294634fb | 1183 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1184 | Qinvisible, |
294634fb KH |
1185 | selected_window))) |
1186 | return 0; | |
d169fe39 | 1187 | |
6ec8bbd2 | 1188 | XSETFASTINT (position, PT - 1); |
2f24f5ac | 1189 | if (XFASTINT (position) >= BEGV |
294634fb | 1190 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1191 | Qinvisible, |
294634fb KH |
1192 | selected_window))) |
1193 | return 0; | |
d169fe39 RS |
1194 | #endif |
1195 | ||
502b9b64 | 1196 | FRAME_CURSOR_X (frame) += n; |
a5d8b611 | 1197 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (frame)); |
6ec8bbd2 | 1198 | XSETFASTINT (w->last_point, PT); |
502b9b64 | 1199 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 1200 | fflush (stdout); |
d169fe39 | 1201 | |
4588ec20 JB |
1202 | return 1; |
1203 | } | |
1204 | \f | |
1205 | static void update_line (); | |
1206 | ||
502b9b64 | 1207 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
1208 | Value is nonzero if redisplay stopped due to pending input. |
1209 | FORCE nonzero means do not stop for pending input. */ | |
1210 | ||
1211 | int | |
502b9b64 JB |
1212 | update_frame (f, force, inhibit_hairy_id) |
1213 | FRAME_PTR f; | |
4588ec20 JB |
1214 | int force; |
1215 | int inhibit_hairy_id; | |
1216 | { | |
54633da0 | 1217 | register struct frame_glyphs *current_frame; |
7098a0fa | 1218 | register struct frame_glyphs *desired_frame = 0; |
4588ec20 JB |
1219 | register int i; |
1220 | int pause; | |
1221 | int preempt_count = baud_rate / 2400 + 1; | |
dfcf069d | 1222 | extern int input_pending; |
fd2e066a | 1223 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 JB |
1224 | register int downto, leftmost; |
1225 | #endif | |
1226 | ||
c37e4889 RS |
1227 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
1228 | calculate_costs (f); | |
1229 | ||
d88c2b9e RS |
1230 | if (preempt_count <= 0) |
1231 | preempt_count = 1; | |
1232 | ||
502b9b64 | 1233 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1234 | |
1235 | detect_input_pending (); | |
1236 | if (input_pending && !force) | |
1237 | { | |
1238 | pause = 1; | |
1239 | goto do_pause; | |
1240 | } | |
1241 | ||
502b9b64 | 1242 | update_begin (f); |
4588ec20 JB |
1243 | |
1244 | if (!line_ins_del_ok) | |
1245 | inhibit_hairy_id = 1; | |
1246 | ||
7098a0fa RS |
1247 | /* These are separate to avoid a possible bug in the AIX C compiler. */ |
1248 | current_frame = FRAME_CURRENT_GLYPHS (f); | |
1249 | desired_frame = FRAME_DESIRED_GLYPHS (f); | |
1250 | ||
efb859b4 JB |
1251 | /* See if any of the desired lines are enabled; don't compute for |
1252 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1253 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1254 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1255 | break; |
1256 | ||
1257 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1258 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1259 | force |= scrolling (f); | |
4588ec20 JB |
1260 | |
1261 | /* Update the individual lines as needed. Do bottom line first. */ | |
1262 | ||
502b9b64 JB |
1263 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1264 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 | 1265 | |
fd2e066a GV |
1266 | #ifdef HAVE_WINDOW_SYSTEM |
1267 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 1268 | { |
fd2e066a | 1269 | leftmost = downto = FRAME_INTERNAL_BORDER_WIDTH (f); |
502b9b64 | 1270 | if (desired_frame->enable[0]) |
4588ec20 | 1271 | { |
502b9b64 JB |
1272 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1273 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
fd2e066a | 1274 | = PIXEL_HEIGHT (f) - FRAME_INTERNAL_BORDER_WIDTH (f) |
448fd7c0 | 1275 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1276 | current_frame->top_left_x[0] = leftmost; |
1277 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1278 | } |
1279 | } | |
fd2e066a | 1280 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
1281 | |
1282 | /* Now update the rest of the lines. */ | |
502b9b64 | 1283 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1284 | { |
502b9b64 | 1285 | if (desired_frame->enable[i]) |
4588ec20 | 1286 | { |
b6a65ac2 | 1287 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1288 | { |
1289 | /* Flush out every so many lines. | |
1290 | Also flush out if likely to have more than 1k buffered | |
1291 | otherwise. I'm told that some telnet connections get | |
1292 | really screwed by more than 1k output at once. */ | |
1293 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1294 | if (outq > 900 | |
1295 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1296 | { | |
1297 | fflush (stdout); | |
1298 | if (preempt_count == 1) | |
1299 | { | |
a41f8bed JB |
1300 | #ifdef EMACS_OUTQSIZE |
1301 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1302 | /* Probably not a tty. Ignore the error and reset |
1303 | * the outq count. */ | |
1304 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1305 | #endif | |
1306 | outq *= 10; | |
d520f0d2 | 1307 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 1308 | sleep (outq / baud_rate); |
4588ec20 JB |
1309 | } |
1310 | } | |
4588ec20 JB |
1311 | } |
1312 | ||
a2960116 RS |
1313 | if ((i - 1) % preempt_count == 0) |
1314 | detect_input_pending (); | |
1315 | ||
502b9b64 | 1316 | update_line (f, i); |
fd2e066a GV |
1317 | #ifdef HAVE_WINDOW_SYSTEM |
1318 | if (FRAME_WINDOW_P (f)) | |
4588ec20 | 1319 | { |
502b9b64 JB |
1320 | current_frame->top_left_y[i] = downto; |
1321 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 | 1322 | } |
fd2e066a | 1323 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 JB |
1324 | } |
1325 | ||
fd2e066a GV |
1326 | #ifdef HAVE_WINDOW_SYSTEM |
1327 | if (FRAME_WINDOW_P (f)) | |
448fd7c0 | 1328 | downto += current_frame->pix_height[i]; |
fd2e066a | 1329 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 1330 | } |
502b9b64 | 1331 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1332 | |
1333 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1334 | if (!pause) | |
1335 | { | |
48cf7030 | 1336 | if ((cursor_in_echo_area |
2577053b RS |
1337 | /* If we are showing a message instead of the minibuffer, |
1338 | show the cursor for the message instead of for the | |
1339 | (now hidden) minibuffer contents. */ | |
1340 | || (EQ (minibuf_window, selected_window) | |
1341 | && EQ (minibuf_window, echo_area_window) | |
1342 | && echo_area_glyphs != 0)) | |
1343 | /* These cases apply only to the frame that contains | |
1344 | the active minibuffer window. */ | |
1345 | && FRAME_HAS_MINIBUF_P (f) | |
140f8645 | 1346 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 1347 | { |
648fa17d JB |
1348 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1349 | int row, col; | |
1350 | ||
1351 | if (cursor_in_echo_area < 0) | |
1352 | { | |
1353 | row = top; | |
1354 | col = 0; | |
1355 | } | |
1113d9db | 1356 | else |
648fa17d JB |
1357 | { |
1358 | /* If the minibuffer is several lines high, find the last | |
1359 | line that has any text on it. */ | |
1360 | row = FRAME_HEIGHT (f); | |
1361 | do | |
1362 | { | |
1363 | row--; | |
1364 | if (current_frame->enable[row]) | |
1365 | col = current_frame->used[row]; | |
1366 | else | |
1367 | col = 0; | |
1368 | } | |
1369 | while (row > top && col == 0); | |
1370 | ||
6395da5c | 1371 | /* Make sure COL is not out of range. */ |
868e640e | 1372 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 1373 | { |
6395da5c | 1374 | /* If we have another row, advance cursor into it. */ |
648fa17d | 1375 | if (row < FRAME_HEIGHT (f) - 1) |
6395da5c RS |
1376 | { |
1377 | col = FRAME_LEFT_SCROLL_BAR_WIDTH (f); | |
1378 | row++; | |
1379 | } | |
1380 | /* Otherwise move it back in range. */ | |
1381 | else | |
868e640e | 1382 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
1383 | } |
1384 | } | |
1385 | ||
1386 | cursor_to (row, col); | |
1113d9db | 1387 | } |
4588ec20 | 1388 | else |
9bfd4456 | 1389 | cursor_to (FRAME_CURSOR_Y (f), |
868e640e RS |
1390 | minmax (0, FRAME_CURSOR_X (f), |
1391 | FRAME_CURSOR_X_LIMIT (f) - 1)); | |
4588ec20 JB |
1392 | } |
1393 | ||
502b9b64 | 1394 | update_end (f); |
4588ec20 JB |
1395 | |
1396 | if (termscript) | |
1397 | fflush (termscript); | |
1398 | fflush (stdout); | |
1399 | ||
1400 | /* Here if output is preempted because input is detected. */ | |
1401 | do_pause: | |
1402 | ||
502b9b64 | 1403 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1404 | display_completed = !pause; |
1405 | ||
f5843453 | 1406 | bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1407 | return pause; |
1408 | } | |
1409 | ||
1410 | /* Called when about to quit, to check for doing so | |
1411 | at an improper time. */ | |
1412 | ||
1413 | void | |
1414 | quit_error_check () | |
1415 | { | |
1c78509b | 1416 | #if 0 |
502b9b64 | 1417 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1418 | return; |
502b9b64 | 1419 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1420 | abort (); |
502b9b64 | 1421 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 | 1422 | abort (); |
1c78509b | 1423 | #endif |
4588ec20 JB |
1424 | } |
1425 | \f | |
1426 | /* Decide what insert/delete line to do, and do it */ | |
1427 | ||
1428 | extern void scrolling_1 (); | |
1429 | ||
dfcf069d | 1430 | int |
502b9b64 JB |
1431 | scrolling (frame) |
1432 | FRAME_PTR frame; | |
4588ec20 JB |
1433 | { |
1434 | int unchanged_at_top, unchanged_at_bottom; | |
1435 | int window_size; | |
1436 | int changed_lines; | |
502b9b64 JB |
1437 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1438 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1439 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
190bb91a | 1440 | int *old_draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
4588ec20 | 1441 | register int i; |
502b9b64 JB |
1442 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1443 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1444 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1445 | |
1446 | /* Compute hash codes of all the lines. | |
1447 | Also calculate number of changed lines, | |
1448 | number of unchanged lines at the beginning, | |
1449 | and number of unchanged lines at the end. */ | |
1450 | ||
1451 | changed_lines = 0; | |
1452 | unchanged_at_top = 0; | |
502b9b64 JB |
1453 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1454 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1455 | { |
1456 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1457 | if (!current_frame->enable[i]) |
4588ec20 | 1458 | return 0; |
502b9b64 JB |
1459 | old_hash[i] = line_hash_code (current_frame, i); |
1460 | if (! desired_frame->enable[i]) | |
f188b3c4 RS |
1461 | { |
1462 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
1463 | new_hash[i] = old_hash[i]; | |
1464 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
1465 | draw_cost[i] = INFINITY; | |
1466 | } | |
4588ec20 | 1467 | else |
f188b3c4 RS |
1468 | { |
1469 | new_hash[i] = line_hash_code (desired_frame, i); | |
1470 | draw_cost[i] = line_draw_cost (desired_frame, i); | |
1471 | } | |
4588ec20 JB |
1472 | |
1473 | if (old_hash[i] != new_hash[i]) | |
1474 | { | |
1475 | changed_lines++; | |
502b9b64 | 1476 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1477 | } |
1478 | else if (i == unchanged_at_top) | |
1479 | unchanged_at_top++; | |
190bb91a | 1480 | old_draw_cost[i] = line_draw_cost (current_frame, i); |
4588ec20 JB |
1481 | } |
1482 | ||
1483 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
190bb91a | 1484 | if (!scroll_region_ok && changed_lines < baud_rate / 2400 |
502b9b64 | 1485 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1486 | return 1; |
1487 | ||
502b9b64 | 1488 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1489 | - unchanged_at_bottom); |
1490 | ||
1491 | if (scroll_region_ok) | |
1492 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1493 | else if (memory_below_frame) |
4588ec20 JB |
1494 | free_at_end_vpos = -1; |
1495 | ||
1496 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1497 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 1498 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
1499 | && (window_size >= |
1500 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1501 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1502 | old_hash, new_hash, draw_cost))) |
1503 | return 0; | |
1504 | ||
502b9b64 | 1505 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 1506 | draw_cost + unchanged_at_top - 1, |
190bb91a | 1507 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
1508 | old_hash + unchanged_at_top - 1, |
1509 | new_hash + unchanged_at_top - 1, | |
1510 | free_at_end_vpos - unchanged_at_top); | |
1511 | ||
1512 | return 0; | |
1513 | } | |
1514 | \f | |
1515 | /* Return the offset in its buffer of the character at location col, line | |
1516 | in the given window. */ | |
1517 | int | |
1518 | buffer_posn_from_coords (window, col, line) | |
1519 | struct window *window; | |
1520 | int col, line; | |
1521 | { | |
ef0fdbb1 | 1522 | int hscroll = XINT (window->hscroll); |
9bfd4456 | 1523 | int window_left = WINDOW_LEFT_MARGIN (window); |
4588ec20 JB |
1524 | |
1525 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1526 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1527 | window. */ | |
fa61c701 | 1528 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1529 | |
efb859b4 | 1530 | int startp = marker_position (window->start); |
4588ec20 JB |
1531 | |
1532 | /* Since compute_motion will only operate on the current buffer, | |
1533 | we need to save the old one and restore it when we're done. */ | |
1534 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1535 | struct position *posn; |
4588ec20 JB |
1536 | |
1537 | current_buffer = XBUFFER (window->buffer); | |
1538 | ||
2ba9ed58 KH |
1539 | /* We can't get a correct result in this case, |
1540 | but at least prevent compute_motion from crashing. */ | |
1541 | if (startp < BEGV) | |
1542 | startp = BEGV; | |
1543 | ||
502b9b64 JB |
1544 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1545 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1546 | the window, but it isn't maintained correctly, and I'm not even |
1547 | sure I will keep it. */ | |
1548 | posn = compute_motion (startp, 0, | |
94129385 KH |
1549 | ((window == XWINDOW (minibuf_window) && startp == BEG |
1550 | ? minibuf_prompt_width : 0) | |
1551 | + (hscroll ? 1 - hscroll : 0)), | |
1552 | 0, | |
fb0f454a | 1553 | ZV, line, col, |
e37f06d7 | 1554 | window_width, hscroll, 0, window); |
4588ec20 JB |
1555 | |
1556 | current_buffer = old_current_buffer; | |
1557 | ||
502b9b64 | 1558 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1559 | to be *after* the newline, i.e. at the start of the next line. |
1560 | This is reasonable, but not really what we want. So if the | |
1561 | result is on a line below LINE, back it up one character. */ | |
1562 | if (posn->vpos > line) | |
1563 | return posn->bufpos - 1; | |
1564 | else | |
1565 | return posn->bufpos; | |
4588ec20 JB |
1566 | } |
1567 | \f | |
1568 | static int | |
1569 | count_blanks (r) | |
1570 | register GLYPH *r; | |
1571 | { | |
1572 | register GLYPH *p = r; | |
94aa5d2d RS |
1573 | while (*p++ == SPACEGLYPH); |
1574 | return p - r - 1; | |
4588ec20 JB |
1575 | } |
1576 | ||
1577 | static int | |
1578 | count_match (str1, str2) | |
1579 | GLYPH *str1, *str2; | |
1580 | { | |
1581 | register GLYPH *p1 = str1; | |
1582 | register GLYPH *p2 = str2; | |
1583 | while (*p1++ == *p2++); | |
1584 | return p1 - str1 - 1; | |
1585 | } | |
1586 | ||
1587 | /* Char insertion/deletion cost vector, from term.c */ | |
1588 | extern int *char_ins_del_vector; | |
1589 | ||
29ec5d84 | 1590 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))]) |
4588ec20 JB |
1591 | |
1592 | static void | |
502b9b64 JB |
1593 | update_line (frame, vpos) |
1594 | register FRAME_PTR frame; | |
4588ec20 JB |
1595 | int vpos; |
1596 | { | |
1597 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
60a8948a | 1598 | int *temp1; |
4588ec20 JB |
1599 | int tem; |
1600 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
24e86043 | 1601 | GLYPH save; |
502b9b64 JB |
1602 | register struct frame_glyphs *current_frame |
1603 | = FRAME_CURRENT_GLYPHS (frame); | |
1604 | register struct frame_glyphs *desired_frame | |
1605 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1606 | |
502b9b64 JB |
1607 | if (desired_frame->highlight[vpos] |
1608 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1609 | { |
502b9b64 JB |
1610 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1611 | (current_frame->enable[vpos] ? | |
1612 | current_frame->used[vpos] : 0)); | |
1613 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1614 | } |
1615 | else | |
502b9b64 | 1616 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1617 | |
502b9b64 | 1618 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1619 | { |
1620 | olen = 0; | |
1621 | } | |
1622 | else | |
1623 | { | |
502b9b64 JB |
1624 | obody = current_frame->glyphs[vpos]; |
1625 | olen = current_frame->used[vpos]; | |
1626 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1627 | { |
1628 | if (!must_write_spaces) | |
ed874011 | 1629 | while (olen > 0 && obody[olen - 1] == SPACEGLYPH) |
4588ec20 JB |
1630 | olen--; |
1631 | } | |
1632 | else | |
1633 | { | |
1634 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1635 | spaces all the way to the frame edge |
4588ec20 JB |
1636 | so that the reverse video extends all the way across. */ |
1637 | ||
29ec5d84 | 1638 | while (olen < FRAME_WINDOW_WIDTH (frame) - 1) |
4588ec20 JB |
1639 | obody[olen++] = SPACEGLYPH; |
1640 | } | |
1641 | } | |
1642 | ||
1643 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1644 | current_frame->enable[vpos] = 1; |
1645 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1646 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1647 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 | 1648 | |
fd2e066a GV |
1649 | #ifdef HAVE_WINDOW_SYSTEM |
1650 | if (FRAME_WINDOW_P (frame)) | |
4588ec20 | 1651 | { |
502b9b64 JB |
1652 | current_frame->pix_width[vpos] |
1653 | = current_frame->used[vpos] | |
fd2e066a | 1654 | * FONT_WIDTH (FRAME_FONT (frame)); |
502b9b64 | 1655 | current_frame->pix_height[vpos] |
fd2e066a | 1656 | = FRAME_LINE_HEIGHT (frame); |
4588ec20 | 1657 | } |
fd2e066a | 1658 | #endif /* HAVE_WINDOW_SYSTEM */ |
4588ec20 | 1659 | |
502b9b64 | 1660 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1661 | { |
1662 | nlen = 0; | |
1663 | goto just_erase; | |
1664 | } | |
1665 | ||
502b9b64 JB |
1666 | nbody = desired_frame->glyphs[vpos]; |
1667 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1668 | |
1669 | /* Pretend trailing spaces are not there at all, | |
1670 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1671 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1672 | { |
1673 | if (!must_write_spaces) | |
1674 | /* We know that the previous character byte contains 0. */ | |
1675 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1676 | nlen--; | |
1677 | } | |
1678 | else | |
1679 | { | |
1680 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1681 | all the way to the frame edge |
4588ec20 JB |
1682 | so that the reverse video extends all the way across. */ |
1683 | ||
29ec5d84 | 1684 | while (nlen < FRAME_WINDOW_WIDTH (frame) - 1) |
4588ec20 JB |
1685 | nbody[nlen++] = SPACEGLYPH; |
1686 | } | |
1687 | ||
1688 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1689 | if (!char_ins_del_ok) | |
1690 | { | |
1691 | int i,j; | |
1692 | ||
76426794 RS |
1693 | #if 0 |
1694 | if (FRAME_X_P (frame)) | |
1695 | { | |
1696 | /* Under X, erase everything we are going to rewrite, | |
1697 | and rewrite everything from the first char that's changed. | |
1698 | This is part of supporting fonts like Courier | |
1699 | whose chars can overlap outside the char width. */ | |
1700 | for (i = 0; i < nlen; i++) | |
1701 | if (i >= olen || nbody[i] != obody[i]) | |
1702 | break; | |
1703 | ||
1704 | cursor_to (vpos, i); | |
1705 | if (i != olen) | |
1706 | clear_end_of_line (olen); | |
1707 | write_glyphs (nbody + i, nlen - i); | |
1708 | } | |
1709 | else | |
1710 | {} | |
1711 | #endif /* 0 */ | |
4588ec20 JB |
1712 | for (i = 0; i < nlen; i++) |
1713 | { | |
1714 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1715 | { | |
1716 | cursor_to (vpos, i); | |
24e86043 KH |
1717 | for (j = 1; |
1718 | (i + j < nlen | |
1719 | && (i + j >= olen || nbody[i + j] != obody[i + j] | |
1720 | || (nbody[i + j] & GLYPH_MASK_PADDING))); | |
4588ec20 JB |
1721 | j++); |
1722 | ||
1723 | /* Output this run of non-matching chars. */ | |
1724 | write_glyphs (nbody + i, j); | |
1725 | i += j - 1; | |
1726 | ||
1727 | /* Now find the next non-match. */ | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1732 | if (olen > nlen) | |
1733 | { | |
1734 | cursor_to (vpos, nlen); | |
1735 | clear_end_of_line (olen); | |
1736 | } | |
1737 | ||
502b9b64 JB |
1738 | /* Exchange contents between current_frame and new_frame. */ |
1739 | temp = desired_frame->glyphs[vpos]; | |
1740 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1741 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1742 | |
60a8948a RS |
1743 | /* Exchange charstarts between current_frame and new_frame. */ |
1744 | temp1 = desired_frame->charstarts[vpos]; | |
1745 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1746 | current_frame->charstarts[vpos] = temp1; | |
1747 | ||
4588ec20 JB |
1748 | return; |
1749 | } | |
1750 | ||
1751 | if (!olen) | |
1752 | { | |
502b9b64 | 1753 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1754 | ? 0 : count_blanks (nbody); |
1755 | if (nlen > nsp) | |
1756 | { | |
1757 | cursor_to (vpos, nsp); | |
1758 | write_glyphs (nbody + nsp, nlen - nsp); | |
1759 | } | |
1760 | ||
502b9b64 JB |
1761 | /* Exchange contents between current_frame and new_frame. */ |
1762 | temp = desired_frame->glyphs[vpos]; | |
1763 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1764 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1765 | |
60a8948a RS |
1766 | /* Exchange charstarts between current_frame and new_frame. */ |
1767 | temp1 = desired_frame->charstarts[vpos]; | |
1768 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1769 | current_frame->charstarts[vpos] = temp1; | |
1770 | ||
4588ec20 JB |
1771 | return; |
1772 | } | |
1773 | ||
1774 | obody[olen] = 1; | |
1775 | save = nbody[nlen]; | |
1776 | nbody[nlen] = 0; | |
1777 | ||
1778 | /* Compute number of leading blanks in old and new contents. */ | |
1779 | osp = count_blanks (obody); | |
502b9b64 | 1780 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1781 | nsp = count_blanks (nbody); |
1782 | else | |
1783 | nsp = 0; | |
1784 | ||
1785 | /* Compute number of matching chars starting with first nonblank. */ | |
1786 | begmatch = count_match (obody + osp, nbody + nsp); | |
1787 | ||
1788 | /* Spaces in new match implicit space past the end of old. */ | |
1789 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1790 | if (!must_write_spaces && osp + begmatch == olen) | |
1791 | { | |
1792 | np1 = nbody + nsp; | |
1793 | while (np1[begmatch] == SPACEGLYPH) | |
1794 | begmatch++; | |
1795 | } | |
1796 | ||
1797 | /* Avoid doing insert/delete char | |
1798 | just cause number of leading spaces differs | |
1799 | when the following text does not match. */ | |
1800 | if (begmatch == 0 && osp != nsp) | |
1801 | osp = nsp = min (osp, nsp); | |
1802 | ||
1803 | /* Find matching characters at end of line */ | |
1804 | op1 = obody + olen; | |
1805 | np1 = nbody + nlen; | |
1806 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1807 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1808 | { | |
1809 | op1--; | |
1810 | np1--; | |
1811 | } | |
1812 | endmatch = obody + olen - op1; | |
1813 | ||
1814 | /* Put correct value back in nbody[nlen]. | |
1815 | This is important because direct_output_for_insert | |
1816 | can write into the line at a later point. | |
1817 | If this screws up the zero at the end of the line, re-establish it. */ | |
1818 | nbody[nlen] = save; | |
1819 | obody[olen] = 0; | |
1820 | ||
1821 | /* tem gets the distance to insert or delete. | |
1822 | endmatch is how many characters we save by doing so. | |
1823 | Is it worth it? */ | |
1824 | ||
1825 | tem = (nlen - nsp) - (olen - osp); | |
1826 | if (endmatch && tem | |
502b9b64 | 1827 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1828 | endmatch = 0; |
1829 | ||
1830 | /* nsp - osp is the distance to insert or delete. | |
1831 | If that is nonzero, begmatch is known to be nonzero also. | |
1832 | begmatch + endmatch is how much we save by doing the ins/del. | |
1833 | Is it worth it? */ | |
1834 | ||
1835 | if (nsp != osp | |
1836 | && (!char_ins_del_ok | |
502b9b64 | 1837 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1838 | { |
1839 | begmatch = 0; | |
1840 | endmatch = 0; | |
1841 | osp = nsp = min (osp, nsp); | |
1842 | } | |
1843 | ||
1844 | /* Now go through the line, inserting, writing and | |
1845 | deleting as appropriate. */ | |
1846 | ||
1847 | if (osp > nsp) | |
1848 | { | |
1849 | cursor_to (vpos, nsp); | |
1850 | delete_glyphs (osp - nsp); | |
1851 | } | |
1852 | else if (nsp > osp) | |
1853 | { | |
1854 | /* If going to delete chars later in line | |
1855 | and insert earlier in the line, | |
1856 | must delete first to avoid losing data in the insert */ | |
1857 | if (endmatch && nlen < olen + nsp - osp) | |
1858 | { | |
1859 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1860 | delete_glyphs (olen + nsp - osp - nlen); | |
1861 | olen = nlen - (nsp - osp); | |
1862 | } | |
1863 | cursor_to (vpos, osp); | |
dfcf069d | 1864 | insert_glyphs ((GLYPH *) 0, nsp - osp); |
4588ec20 JB |
1865 | } |
1866 | olen += nsp - osp; | |
1867 | ||
1868 | tem = nsp + begmatch + endmatch; | |
1869 | if (nlen != tem || olen != tem) | |
1870 | { | |
1871 | cursor_to (vpos, nsp + begmatch); | |
1872 | if (!endmatch || nlen == olen) | |
1873 | { | |
1874 | /* If new text being written reaches right margin, | |
1875 | there is no need to do clear-to-eol at the end. | |
1876 | (and it would not be safe, since cursor is not | |
1877 | going to be "at the margin" after the text is done) */ | |
29ec5d84 | 1878 | if (nlen == FRAME_WINDOW_WIDTH (frame)) |
4588ec20 JB |
1879 | olen = 0; |
1880 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1881 | ||
1882 | #ifdef obsolete | |
1883 | ||
1884 | /* the following code loses disastrously if tem == nlen. | |
1885 | Rather than trying to fix that case, I am trying the simpler | |
1886 | solution found above. */ | |
1887 | ||
1888 | /* If the text reaches to the right margin, | |
1889 | it will lose one way or another (depending on AutoWrap) | |
1890 | to clear to end of line after outputting all the text. | |
1891 | So pause with one character to go and clear the line then. */ | |
29ec5d84 | 1892 | if (nlen == FRAME_WINDOW_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1893 | { |
1894 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1895 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1896 | clear_end_of_line (olen); | |
1897 | olen = 0; /* Don't let it be cleared again later */ | |
1898 | write_glyphs (nbody + nlen - 1, 1); | |
1899 | } | |
1900 | else | |
1901 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1902 | #endif /* OBSOLETE */ | |
1903 | ||
1904 | } | |
1905 | else if (nlen > olen) | |
1906 | { | |
24e86043 KH |
1907 | /* Here, we used to have the following simple code: |
1908 | ---------------------------------------- | |
1909 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1910 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1911 | ---------------------------------------- | |
1912 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
1913 | is a padding glyph. */ | |
1914 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
1915 | int del; | |
1916 | ||
1917 | /* Calculate columns we can actually overwrite. */ | |
1918 | while (nbody[nsp + begmatch + out] & GLYPH_MASK_PADDING) out--; | |
1919 | write_glyphs (nbody + nsp + begmatch, out); | |
1920 | /* If we left columns to be overwritten. we must delete them. */ | |
1921 | del = olen - tem - out; | |
1922 | if (del > 0) delete_glyphs (del); | |
1923 | /* At last, we insert columns not yet written out. */ | |
1924 | insert_glyphs (nbody + nsp + begmatch + out, nlen - olen + del); | |
4588ec20 JB |
1925 | olen = nlen; |
1926 | } | |
1927 | else if (olen > nlen) | |
1928 | { | |
1929 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1930 | delete_glyphs (olen - nlen); | |
1931 | olen = nlen; | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | just_erase: | |
1936 | /* If any unerased characters remain after the new line, erase them. */ | |
1937 | if (olen > nlen) | |
1938 | { | |
1939 | cursor_to (vpos, nlen); | |
1940 | clear_end_of_line (olen); | |
1941 | } | |
1942 | ||
502b9b64 JB |
1943 | /* Exchange contents between current_frame and new_frame. */ |
1944 | temp = desired_frame->glyphs[vpos]; | |
1945 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1946 | current_frame->glyphs[vpos] = temp; | |
60a8948a RS |
1947 | |
1948 | /* Exchange charstarts between current_frame and new_frame. */ | |
1949 | temp1 = desired_frame->charstarts[vpos]; | |
1950 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1951 | current_frame->charstarts[vpos] = temp1; | |
4588ec20 JB |
1952 | } |
1953 | \f | |
6f7bbf79 KH |
1954 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the |
1955 | session's frames, frame names, buffers, buffer-read-only flags, and | |
1956 | buffer-modified-flags, and a trailing sentinel (so we don't need to | |
1957 | add length checks). */ | |
078b3696 KH |
1958 | static Lisp_Object frame_and_buffer_state; |
1959 | ||
1960 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
1961 | Sframe_or_buffer_changed_p, 0, 0, 0, | |
1962 | "Return non-nil if the frame and buffer state appears to have changed.\n\ | |
1963 | The state variable is an internal vector containing all frames and buffers,\n\ | |
836d2cde | 1964 | aside from buffers whose names start with space,\n\ |
078b3696 KH |
1965 | along with the buffers' read-only and modified flags, which allows a fast\n\ |
1966 | check to see whether the menu bars might need to be recomputed.\n\ | |
1967 | If this function returns non-nil, it updates the internal vector to reflect\n\ | |
1968 | the current state.\n") | |
1969 | () | |
1970 | { | |
1971 | Lisp_Object tail, frame, buf; | |
1972 | Lisp_Object *vecp; | |
1973 | int n; | |
bd9e3e75 | 1974 | |
078b3696 KH |
1975 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1976 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
1977 | { |
1978 | if (!EQ (*vecp++, frame)) | |
1979 | goto changed; | |
1980 | if (!EQ (*vecp++, XFRAME (frame)->name)) | |
1981 | goto changed; | |
1982 | } | |
50cf83f8 RS |
1983 | /* Check that the buffer info matches. |
1984 | No need to test for the end of the vector | |
1985 | because the last element of the vector is lambda | |
1986 | and that will always cause a mismatch. */ | |
078b3696 KH |
1987 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1988 | { | |
1989 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1990 | /* Ignore buffers that aren't included in buffer lists. */ |
1991 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1992 | continue; | |
078b3696 KH |
1993 | if (!EQ (*vecp++, buf)) |
1994 | goto changed; | |
1995 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
1996 | goto changed; | |
1997 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
1998 | goto changed; | |
1999 | } | |
50cf83f8 | 2000 | /* Detect deletion of a buffer at the end of the list. */ |
488f0c64 | 2001 | if (EQ (*vecp, Qlambda)) |
50cf83f8 | 2002 | return Qnil; |
078b3696 | 2003 | changed: |
5dad8282 | 2004 | /* Start with 1 so there is room for at least one lambda at the end. */ |
078b3696 KH |
2005 | n = 1; |
2006 | FOR_EACH_FRAME (tail, frame) | |
d1dad759 | 2007 | n += 2; |
078b3696 KH |
2008 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
2009 | n += 3; | |
267ad509 KH |
2010 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ |
2011 | if (n > XVECTOR (frame_and_buffer_state)->size | |
d1dad759 KH |
2012 | || n + 20 < XVECTOR (frame_and_buffer_state)->size / 2) |
2013 | /* Add 20 extra so we grow it less often. */ | |
2014 | frame_and_buffer_state = Fmake_vector (make_number (n + 20), Qlambda); | |
078b3696 KH |
2015 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
2016 | FOR_EACH_FRAME (tail, frame) | |
bd9e3e75 KH |
2017 | { |
2018 | *vecp++ = frame; | |
2019 | *vecp++ = XFRAME (frame)->name; | |
2020 | } | |
078b3696 KH |
2021 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
2022 | { | |
2023 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
2024 | /* Ignore buffers that aren't included in buffer lists. */ |
2025 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
2026 | continue; | |
078b3696 KH |
2027 | *vecp++ = buf; |
2028 | *vecp++ = XBUFFER (buf)->read_only; | |
2029 | *vecp++ = Fbuffer_modified_p (buf); | |
2030 | } | |
d1dad759 KH |
2031 | /* Fill up the vector with lambdas (always at least one). */ |
2032 | *vecp++ = Qlambda; | |
2033 | while (vecp - XVECTOR (frame_and_buffer_state)->contents | |
2034 | < XVECTOR (frame_and_buffer_state)->size) | |
267ad509 | 2035 | *vecp++ = Qlambda; |
d1dad759 KH |
2036 | /* Make sure we didn't overflow the vector. */ |
2037 | if (vecp - XVECTOR (frame_and_buffer_state)->contents | |
2038 | > XVECTOR (frame_and_buffer_state)->size) | |
2039 | abort (); | |
078b3696 KH |
2040 | return Qt; |
2041 | } | |
2042 | \f | |
4588ec20 JB |
2043 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
2044 | 1, 1, "FOpen termscript file: ", | |
2045 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
2046 | FILE = nil means just close any termscript file currently open.") | |
2047 | (file) | |
2048 | Lisp_Object file; | |
2049 | { | |
2050 | if (termscript != 0) fclose (termscript); | |
2051 | termscript = 0; | |
2052 | ||
efb859b4 | 2053 | if (! NILP (file)) |
4588ec20 JB |
2054 | { |
2055 | file = Fexpand_file_name (file, Qnil); | |
2056 | termscript = fopen (XSTRING (file)->data, "w"); | |
2057 | if (termscript == 0) | |
2058 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
2059 | } | |
2060 | return Qnil; | |
2061 | } | |
2062 | \f | |
2063 | ||
2064 | #ifdef SIGWINCH | |
efb859b4 | 2065 | SIGTYPE |
61cbef47 RS |
2066 | window_change_signal (signalnum) /* If we don't have an argument, */ |
2067 | int signalnum; /* some compilers complain in signal calls. */ | |
4588ec20 JB |
2068 | { |
2069 | int width, height; | |
2070 | extern int errno; | |
2071 | int old_errno = errno; | |
2072 | ||
502b9b64 | 2073 | get_frame_size (&width, &height); |
4588ec20 | 2074 | |
502b9b64 JB |
2075 | /* The frame size change obviously applies to a termcap-controlled |
2076 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 2077 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 2078 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
2079 | but don't reallocate the data structures now. Let that be done |
2080 | later outside of the signal handler. */ | |
2081 | ||
2082 | { | |
35f56f96 | 2083 | Lisp_Object tail, frame; |
4588ec20 | 2084 | |
35f56f96 | 2085 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2086 | { |
35f56f96 | 2087 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 2088 | { |
35f56f96 | 2089 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
2090 | break; |
2091 | } | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | signal (SIGWINCH, window_change_signal); | |
2096 | errno = old_errno; | |
2097 | } | |
2098 | #endif /* SIGWINCH */ | |
2099 | ||
2100 | ||
502b9b64 | 2101 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 | 2102 | |
dfcf069d | 2103 | void |
4588ec20 JB |
2104 | do_pending_window_change () |
2105 | { | |
2106 | /* If window_change_signal should have run before, run it now. */ | |
2107 | while (delayed_size_change) | |
2108 | { | |
35f56f96 | 2109 | Lisp_Object tail, frame; |
4588ec20 JB |
2110 | |
2111 | delayed_size_change = 0; | |
2112 | ||
35f56f96 | 2113 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2114 | { |
35f56f96 JB |
2115 | FRAME_PTR f = XFRAME (frame); |
2116 | ||
502b9b64 JB |
2117 | int height = FRAME_NEW_HEIGHT (f); |
2118 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 2119 | |
08f7aa3e | 2120 | if (height != 0 || width != 0) |
b6a65ac2 | 2121 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
2122 | } |
2123 | } | |
2124 | } | |
2125 | ||
2126 | ||
502b9b64 | 2127 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 2128 | indicate no change is to take place. |
4588ec20 | 2129 | |
b6a65ac2 JB |
2130 | If DELAY is non-zero, then assume we're being called from a signal |
2131 | handler, and queue the change for later - perhaps the next | |
2132 | redisplay. Since this tries to resize windows, we can't call it | |
2133 | from a signal handler. */ | |
2134 | ||
dfcf069d | 2135 | void |
45140e01 RS |
2136 | change_frame_size (f, newheight, newwidth, pretend, delay) |
2137 | register FRAME_PTR f; | |
dfcf069d | 2138 | int newheight, newwidth, pretend, delay; |
45140e01 RS |
2139 | { |
2140 | Lisp_Object tail, frame; | |
3826ea1a | 2141 | |
8a376b3b | 2142 | if (! FRAME_WINDOW_P (f)) |
45140e01 | 2143 | { |
93e54836 RS |
2144 | /* When using termcap, or on MS-DOS, all frames use |
2145 | the same screen, so a change in size affects all frames. */ | |
45140e01 | 2146 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 2147 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 RS |
2148 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
2149 | pretend, delay); | |
2150 | } | |
2151 | else | |
2152 | change_frame_size_1 (f, newheight, newwidth, pretend, delay); | |
2153 | } | |
2154 | ||
2155 | static void | |
2156 | change_frame_size_1 (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 2157 | register FRAME_PTR frame; |
a1d789d0 | 2158 | int newheight, newwidth, pretend, delay; |
4588ec20 | 2159 | { |
9bfd4456 | 2160 | int new_frame_window_width; |
3826ea1a | 2161 | unsigned int total_glyphs; |
e523f7e5 | 2162 | int count = specpdl_ptr - specpdl; |
3826ea1a | 2163 | |
4588ec20 | 2164 | /* If we can't deal with the change now, queue it for later. */ |
b6a65ac2 | 2165 | if (delay) |
4588ec20 | 2166 | { |
b6a65ac2 | 2167 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 2168 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
2169 | delayed_size_change = 1; |
2170 | return; | |
2171 | } | |
2172 | ||
502b9b64 JB |
2173 | /* This size-change overrides any pending one for this frame. */ |
2174 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
2175 | FRAME_NEW_WIDTH (frame) = 0; |
2176 | ||
08f7aa3e | 2177 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 EN |
2178 | if (newheight == 0) |
2179 | newheight = FRAME_HEIGHT (frame); | |
2180 | if (newwidth == 0) | |
2181 | newwidth = FRAME_WIDTH (frame); | |
9bfd4456 | 2182 | new_frame_window_width = FRAME_WINDOW_WIDTH_ARG (frame, newwidth); |
4588ec20 | 2183 | |
3826ea1a RS |
2184 | total_glyphs = newheight * (newwidth + 2) * sizeof (GLYPH); |
2185 | ||
2186 | /* If these sizes are so big they cause overflow, | |
2187 | just ignore the change. It's not clear what better we could do. */ | |
2188 | if (total_glyphs / sizeof (GLYPH) / newheight != newwidth + 2) | |
2189 | return; | |
2190 | ||
b6a65ac2 JB |
2191 | /* Round up to the smallest acceptable size. */ |
2192 | check_frame_size (frame, &newheight, &newwidth); | |
2193 | ||
2194 | /* If we're not changing the frame size, quit now. */ | |
2195 | if (newheight == FRAME_HEIGHT (frame) | |
9bfd4456 | 2196 | && new_frame_window_width == FRAME_WINDOW_WIDTH (frame)) |
4588ec20 JB |
2197 | return; |
2198 | ||
cbb95688 RS |
2199 | BLOCK_INPUT; |
2200 | ||
886a8a6c KH |
2201 | #ifdef MSDOS |
2202 | /* We only can set screen dimensions to certain values supported | |
2203 | by our video hardware. Try to find the smallest size greater | |
2204 | or equal to the requested dimensions. */ | |
2205 | dos_set_window_size (&newheight, &newwidth); | |
2206 | #endif | |
2207 | ||
b6a65ac2 | 2208 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 2209 | { |
b6a65ac2 | 2210 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 2211 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 2212 | { |
502b9b64 JB |
2213 | /* Frame has both root and minibuffer. */ |
2214 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 2215 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
a5d8b611 KH |
2216 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top, |
2217 | newheight - 1); | |
502b9b64 | 2218 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
2219 | } |
2220 | else | |
502b9b64 | 2221 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
2222 | set_window_height (FRAME_ROOT_WINDOW (frame), |
2223 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
2224 | |
2225 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
2226 | FrameRows = newheight; | |
4588ec20 JB |
2227 | |
2228 | #if 0 | |
502b9b64 | 2229 | if (frame->output_method == output_termcap) |
4588ec20 | 2230 | { |
b6a65ac2 | 2231 | frame_height = newheight; |
4588ec20 | 2232 | if (!pretend) |
b6a65ac2 | 2233 | FrameRows = newheight; |
4588ec20 JB |
2234 | } |
2235 | #endif | |
2236 | } | |
2237 | ||
9bfd4456 | 2238 | if (new_frame_window_width != FRAME_WINDOW_WIDTH (frame)) |
4588ec20 | 2239 | { |
9bfd4456 | 2240 | set_window_width (FRAME_ROOT_WINDOW (frame), new_frame_window_width, 0); |
b6a65ac2 | 2241 | if (FRAME_HAS_MINIBUF_P (frame)) |
9bfd4456 | 2242 | set_window_width (FRAME_MINIBUF_WINDOW (frame), new_frame_window_width, 0); |
4588ec20 | 2243 | |
b6a65ac2 | 2244 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 2245 | FrameCols = newwidth; |
4588ec20 | 2246 | #if 0 |
502b9b64 | 2247 | if (frame->output_method == output_termcap) |
4588ec20 | 2248 | { |
502b9b64 | 2249 | frame_width = newwidth; |
4588ec20 | 2250 | if (!pretend) |
502b9b64 | 2251 | FrameCols = newwidth; |
4588ec20 JB |
2252 | } |
2253 | #endif | |
2254 | } | |
2255 | ||
b6a65ac2 | 2256 | FRAME_HEIGHT (frame) = newheight; |
9bfd4456 | 2257 | SET_FRAME_WIDTH (frame, newwidth); |
986e61b8 | 2258 | |
868e640e RS |
2259 | if (FRAME_CURSOR_X (frame) >= FRAME_CURSOR_X_LIMIT (frame)) |
2260 | FRAME_CURSOR_X (frame) = FRAME_CURSOR_X_LIMIT (frame) - 1; | |
986e61b8 RS |
2261 | if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) |
2262 | FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; | |
2263 | ||
502b9b64 JB |
2264 | remake_frame_glyphs (frame); |
2265 | calculate_costs (frame); | |
97cf50e7 RS |
2266 | |
2267 | UNBLOCK_INPUT; | |
61730a69 | 2268 | |
e523f7e5 RS |
2269 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
2270 | ||
61730a69 RS |
2271 | /* This isn't quite a no-op: it runs window-configuration-change-hook. */ |
2272 | Fset_window_buffer (FRAME_SELECTED_WINDOW (frame), | |
2273 | XWINDOW (FRAME_SELECTED_WINDOW (frame))->buffer); | |
e523f7e5 RS |
2274 | |
2275 | unbind_to (count, Qnil); | |
4588ec20 JB |
2276 | } |
2277 | \f | |
2278 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
2279 | Ssend_string_to_terminal, 1, 1, 0, | |
2280 | "Send STRING to the terminal without alteration.\n\ | |
2281 | Control characters in STRING will have terminal-dependent effects.") | |
e912ba09 EN |
2282 | (string) |
2283 | Lisp_Object string; | |
4588ec20 | 2284 | { |
94f3db62 | 2285 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
e912ba09 | 2286 | CHECK_STRING (string, 0); |
fc932ac6 | 2287 | fwrite (XSTRING (string)->data, 1, STRING_BYTES (XSTRING (string)), stdout); |
4588ec20 JB |
2288 | fflush (stdout); |
2289 | if (termscript) | |
2290 | { | |
fc932ac6 RS |
2291 | fwrite (XSTRING (string)->data, 1, STRING_BYTES (XSTRING (string)), |
2292 | termscript); | |
4588ec20 JB |
2293 | fflush (termscript); |
2294 | } | |
2295 | return Qnil; | |
2296 | } | |
2297 | ||
2298 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
2299 | "Beep, or flash the screen.\n\ | |
2300 | Also, unless an argument is given,\n\ | |
2301 | terminate any keyboard macro currently executing.") | |
2302 | (arg) | |
2303 | Lisp_Object arg; | |
2304 | { | |
efb859b4 | 2305 | if (!NILP (arg)) |
4588ec20 | 2306 | { |
7fa788da RS |
2307 | if (noninteractive) |
2308 | putchar (07); | |
2309 | else | |
2310 | ring_bell (); | |
4588ec20 JB |
2311 | fflush (stdout); |
2312 | } | |
2313 | else | |
2314 | bitch_at_user (); | |
2315 | ||
2316 | return Qnil; | |
2317 | } | |
2318 | ||
dfcf069d | 2319 | void |
4588ec20 JB |
2320 | bitch_at_user () |
2321 | { | |
2322 | if (noninteractive) | |
2323 | putchar (07); | |
2324 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
2325 | error ("Keyboard macro terminated by a command ringing the bell"); | |
2326 | else | |
2327 | ring_bell (); | |
2328 | fflush (stdout); | |
2329 | } | |
2330 | ||
2331 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 2332 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
2333 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2334 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2335 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2336 | Emacs was built without floating point support.\n\ | |
2337 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
2338 | (seconds, milliseconds) |
2339 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 2340 | { |
767229f8 | 2341 | int sec, usec; |
4588ec20 | 2342 | |
767229f8 | 2343 | if (NILP (milliseconds)) |
e9c9a718 | 2344 | XSETINT (milliseconds, 0); |
767229f8 JB |
2345 | else |
2346 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2347 | usec = XINT (milliseconds) * 1000; |
2348 | ||
2349 | #ifdef LISP_FLOAT_TYPE | |
2350 | { | |
2351 | double duration = extract_float (seconds); | |
2352 | sec = (int) duration; | |
2353 | usec += (duration - sec) * 1000000; | |
2354 | } | |
2355 | #else | |
2356 | CHECK_NUMBER (seconds, 0); | |
2357 | sec = XINT (seconds); | |
2358 | #endif | |
4588ec20 | 2359 | |
a41f8bed | 2360 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2361 | if (sec == 0 && usec != 0) |
2362 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 2363 | #endif |
767229f8 JB |
2364 | |
2365 | /* Assure that 0 <= usec < 1000000. */ | |
2366 | if (usec < 0) | |
2367 | { | |
2368 | /* We can't rely on the rounding being correct if user is negative. */ | |
2369 | if (-1000000 < usec) | |
2370 | sec--, usec += 1000000; | |
2371 | else | |
2372 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 2373 | } |
767229f8 JB |
2374 | else |
2375 | sec += usec / 1000000, usec %= 1000000; | |
2376 | ||
6b5153b1 | 2377 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 2378 | return Qnil; |
4588ec20 | 2379 | |
f76475ad JB |
2380 | { |
2381 | Lisp_Object zero; | |
2382 | ||
a5d8b611 | 2383 | XSETFASTINT (zero, 0); |
f76475ad JB |
2384 | wait_reading_process_input (sec, usec, zero, 0); |
2385 | } | |
d1af74e9 | 2386 | |
767229f8 JB |
2387 | /* We should always have wait_reading_process_input; we have a dummy |
2388 | implementation for systems which don't support subprocesses. */ | |
2389 | #if 0 | |
2390 | /* No wait_reading_process_input */ | |
4588ec20 JB |
2391 | immediate_quit = 1; |
2392 | QUIT; | |
2393 | ||
2394 | #ifdef VMS | |
2395 | sys_sleep (sec); | |
2396 | #else /* not VMS */ | |
2397 | /* The reason this is done this way | |
2398 | (rather than defined (H_S) && defined (H_T)) | |
2399 | is because the VMS preprocessor doesn't grok `defined' */ | |
2400 | #ifdef HAVE_SELECT | |
a41f8bed JB |
2401 | EMACS_GET_TIME (end_time); |
2402 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 2403 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 2404 | |
4588ec20 JB |
2405 | while (1) |
2406 | { | |
a41f8bed JB |
2407 | EMACS_GET_TIME (timeout); |
2408 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2409 | if (EMACS_TIME_NEG_P (timeout) | |
2410 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
2411 | break; |
2412 | } | |
4588ec20 JB |
2413 | #else /* not HAVE_SELECT */ |
2414 | sleep (sec); | |
2415 | #endif /* HAVE_SELECT */ | |
2416 | #endif /* not VMS */ | |
2417 | ||
2418 | immediate_quit = 0; | |
2419 | #endif /* no subprocesses */ | |
2420 | ||
2421 | return Qnil; | |
2422 | } | |
2423 | ||
f76475ad JB |
2424 | /* This is just like wait_reading_process_input, except that |
2425 | it does the redisplay. | |
2426 | ||
ea0d86af | 2427 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 2428 | waiting for input as well. */ |
4588ec20 | 2429 | |
f76475ad | 2430 | Lisp_Object |
ae5a0dd4 RS |
2431 | sit_for (sec, usec, reading, display, initial_display) |
2432 | int sec, usec, reading, display, initial_display; | |
f76475ad JB |
2433 | { |
2434 | Lisp_Object read_kbd; | |
4588ec20 | 2435 | |
ccddf474 RS |
2436 | swallow_events (display); |
2437 | ||
f80bd2d7 | 2438 | if (detect_input_pending_run_timers (display)) |
4588ec20 | 2439 | return Qnil; |
4588ec20 | 2440 | |
ae5a0dd4 | 2441 | if (initial_display) |
f76475ad | 2442 | redisplay_preserve_echo_area (); |
4588ec20 | 2443 | |
dfdb645c JB |
2444 | if (sec == 0 && usec == 0) |
2445 | return Qt; | |
2446 | ||
4588ec20 | 2447 | #ifdef SIGIO |
8fc798e9 | 2448 | gobble_input (0); |
f76475ad JB |
2449 | #endif |
2450 | ||
e9c9a718 | 2451 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
2452 | wait_reading_process_input (sec, usec, read_kbd, display); |
2453 | ||
4588ec20 JB |
2454 | return detect_input_pending () ? Qnil : Qt; |
2455 | } | |
2456 | ||
f76475ad | 2457 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2458 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2459 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2460 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2461 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2462 | Emacs was built without floating point support.\n\ | |
2463 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
e912ba09 | 2464 | Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\ |
f76475ad JB |
2465 | Redisplay is preempted as always if input arrives, and does not happen\n\ |
2466 | if input is available before it starts.\n\ | |
2467 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2468 | (seconds, milliseconds, nodisp) |
2469 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2470 | { |
767229f8 | 2471 | int sec, usec; |
f76475ad | 2472 | |
767229f8 | 2473 | if (NILP (milliseconds)) |
e9c9a718 | 2474 | XSETINT (milliseconds, 0); |
767229f8 JB |
2475 | else |
2476 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2477 | usec = XINT (milliseconds) * 1000; |
2478 | ||
2479 | #ifdef LISP_FLOAT_TYPE | |
2480 | { | |
2481 | double duration = extract_float (seconds); | |
2482 | sec = (int) duration; | |
2483 | usec += (duration - sec) * 1000000; | |
2484 | } | |
2485 | #else | |
2486 | CHECK_NUMBER (seconds, 0); | |
2487 | sec = XINT (seconds); | |
2488 | #endif | |
f76475ad | 2489 | |
f76475ad | 2490 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2491 | if (usec != 0 && sec == 0) |
2492 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2493 | #endif |
f76475ad | 2494 | |
ae5a0dd4 | 2495 | return sit_for (sec, usec, 0, NILP (nodisp), NILP (nodisp)); |
f76475ad | 2496 | } |
4588ec20 JB |
2497 | \f |
2498 | char *terminal_type; | |
2499 | ||
2500 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2501 | /* Determine terminal type and set terminal_driver */ | |
2502 | /* Then invoke its decoding routine to set up variables | |
2503 | in the terminal package */ | |
2504 | ||
dfcf069d | 2505 | void |
4588ec20 JB |
2506 | init_display () |
2507 | { | |
2508 | #ifdef HAVE_X_WINDOWS | |
2509 | extern int display_arg; | |
2510 | #endif | |
2511 | ||
2512 | meta_key = 0; | |
2513 | inverse_video = 0; | |
2514 | cursor_in_echo_area = 0; | |
2515 | terminal_type = (char *) 0; | |
2516 | ||
1315c181 JB |
2517 | /* Now is the time to initialize this; it's used by init_sys_modes |
2518 | during startup. */ | |
2519 | Vwindow_system = Qnil; | |
4588ec20 | 2520 | |
1315c181 JB |
2521 | /* If the user wants to use a window system, we shouldn't bother |
2522 | initializing the terminal. This is especially important when the | |
2523 | terminal is so dumb that emacs gives up before and doesn't bother | |
2524 | using the window system. | |
4588ec20 | 2525 | |
36bbad1d KH |
2526 | If the DISPLAY environment variable is set and nonempty, |
2527 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
2528 | |
2529 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2530 | if (! display_arg) |
2531 | { | |
36bbad1d | 2532 | char *display; |
d460af17 | 2533 | #ifdef VMS |
36bbad1d | 2534 | display = getenv ("DECW$DISPLAY"); |
d460af17 | 2535 | #else |
36bbad1d | 2536 | display = getenv ("DISPLAY"); |
d460af17 | 2537 | #endif |
36bbad1d KH |
2538 | |
2539 | display_arg = (display != 0 && *display != 0); | |
f040093a | 2540 | } |
d460af17 | 2541 | |
9e4555e8 RS |
2542 | if (!inhibit_window_system && display_arg |
2543 | #ifndef CANNOT_DUMP | |
2544 | && initialized | |
2545 | #endif | |
2546 | ) | |
4588ec20 JB |
2547 | { |
2548 | Vwindow_system = intern ("x"); | |
2549 | #ifdef HAVE_X11 | |
2550 | Vwindow_system_version = make_number (11); | |
2551 | #else | |
2552 | Vwindow_system_version = make_number (10); | |
039e5d71 KH |
2553 | #endif |
2554 | #if defined (LINUX) && defined (HAVE_LIBNCURSES) | |
2555 | /* In some versions of ncurses, | |
6a428f77 | 2556 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
2557 | So call tgetent. */ |
2558 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 JB |
2559 | #endif |
2560 | return; | |
2561 | } | |
2562 | #endif /* HAVE_X_WINDOWS */ | |
2563 | ||
fd2e066a GV |
2564 | #ifdef HAVE_NTGUI |
2565 | if (!inhibit_window_system) | |
2566 | { | |
60c7469c | 2567 | Vwindow_system = intern ("w32"); |
fd2e066a GV |
2568 | Vwindow_system_version = make_number (1); |
2569 | return; | |
2570 | } | |
2571 | #endif /* HAVE_NTGUI */ | |
2572 | ||
4588ec20 JB |
2573 | /* If no window system has been specified, try to use the terminal. */ |
2574 | if (! isatty (0)) | |
2575 | { | |
1559a86d | 2576 | fatal ("standard input is not a tty"); |
4588ec20 JB |
2577 | exit (1); |
2578 | } | |
2579 | ||
2580 | /* Look at the TERM variable */ | |
2581 | terminal_type = (char *) getenv ("TERM"); | |
2582 | if (!terminal_type) | |
2583 | { | |
2584 | #ifdef VMS | |
2585 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2586 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2587 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2588 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2589 | #else | |
2590 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2591 | #endif | |
2592 | exit (1); | |
2593 | } | |
2594 | ||
2595 | #ifdef VMS | |
2596 | /* VMS DCL tends to upcase things, so downcase term type. | |
2597 | Hardly any uppercase letters in terminal types; should be none. */ | |
2598 | { | |
2599 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2600 | char *p; | |
2601 | ||
2602 | strcpy (new, terminal_type); | |
2603 | ||
2604 | for (p = new; *p; p++) | |
2605 | if (isupper (*p)) | |
2606 | *p = tolower (*p); | |
2607 | ||
2608 | terminal_type = new; | |
2609 | } | |
2610 | #endif | |
2611 | ||
2612 | term_init (terminal_type); | |
2613 | ||
d86c299a RS |
2614 | { |
2615 | int width = FRAME_WINDOW_WIDTH (selected_frame); | |
2616 | int height = FRAME_HEIGHT (selected_frame); | |
2617 | ||
2618 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
2619 | ||
2620 | /* If these sizes are so big they cause overflow, | |
2621 | just ignore the change. It's not clear what better we could do. */ | |
2622 | if (total_glyphs / sizeof (GLYPH) / height != width + 2) | |
1559a86d | 2623 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
2624 | } |
2625 | ||
502b9b64 JB |
2626 | remake_frame_glyphs (selected_frame); |
2627 | calculate_costs (selected_frame); | |
4588ec20 JB |
2628 | |
2629 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2630 | FRAME_CURSOR_X (selected_frame) = 0; |
2631 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2632 | |
2633 | #ifdef SIGWINCH | |
2634 | #ifndef CANNOT_DUMP | |
2635 | if (initialized) | |
2636 | #endif /* CANNOT_DUMP */ | |
2637 | signal (SIGWINCH, window_change_signal); | |
2638 | #endif /* SIGWINCH */ | |
2639 | } | |
2640 | \f | |
dfcf069d | 2641 | void |
4588ec20 JB |
2642 | syms_of_display () |
2643 | { | |
502b9b64 | 2644 | defsubr (&Sredraw_frame); |
4588ec20 | 2645 | defsubr (&Sredraw_display); |
078b3696 | 2646 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
2647 | defsubr (&Sopen_termscript); |
2648 | defsubr (&Sding); | |
2649 | defsubr (&Ssit_for); | |
2650 | defsubr (&Ssleep_for); | |
2651 | defsubr (&Ssend_string_to_terminal); | |
2652 | ||
d1dad759 | 2653 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
2654 | staticpro (&frame_and_buffer_state); |
2655 | ||
9cda4f7c RS |
2656 | Qdisplay_table = intern ("display-table"); |
2657 | staticpro (&Qdisplay_table); | |
2658 | ||
4588ec20 | 2659 | DEFVAR_INT ("baud-rate", &baud_rate, |
eb285955 | 2660 | "*The output baud rate of the terminal.\n\ |
4588ec20 JB |
2661 | On most systems, changing this value will affect the amount of padding\n\ |
2662 | and the other strategic decisions made during redisplay."); | |
2663 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2664 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2665 | This means everything is in inverse video which otherwise would not be."); |
2666 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2667 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2668 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2669 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2670 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2671 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2672 | It is up to you to set this variable if your terminal can do that."); |
2673 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2674 | "A symbol naming the window-system under which Emacs is running\n\ | |
2675 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2676 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2677 | "The version number of the window system in use.\n\ | |
2678 | For X windows, this is 10 or 11."); | |
2679 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2680 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2681 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2682 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2683 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2684 | Each element can be:\n\ | |
2685 | integer: a glyph code which this glyph is an alias for.\n\ | |
2686 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2687 | nil: this glyph mod 256 is char code to output,\n\ | |
6666f05a | 2688 | and this glyph / 256 is face code for X windows (see `face-id')."); |
4588ec20 JB |
2689 | Vglyph_table = Qnil; |
2690 | ||
2691 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2692 | "Display table to use for buffers that specify none.\n\ | |
2693 | See `buffer-display-table' for more information."); | |
2694 | Vstandard_display_table = Qnil; | |
2695 | ||
2696 | /* Initialize `window-system', unless init_display already decided it. */ | |
2697 | #ifdef CANNOT_DUMP | |
2698 | if (noninteractive) | |
2699 | #endif | |
2700 | { | |
2701 | Vwindow_system = Qnil; | |
2702 | Vwindow_system_version = Qnil; | |
2703 | } | |
2704 | } |