Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
f8c25f1b | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 8 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
22 | ||
18160b98 | 23 | #include <config.h> |
565620a5 RS |
24 | |
25 | #include <stdio.h> | |
4588ec20 JB |
26 | #include <ctype.h> |
27 | ||
47099d6f | 28 | #include "lisp.h" |
4588ec20 JB |
29 | #include "termchar.h" |
30 | #include "termopts.h" | |
3be08bea | 31 | #include "termhooks.h" |
4588ec20 | 32 | #include "cm.h" |
4588ec20 JB |
33 | #include "dispextern.h" |
34 | #include "buffer.h" | |
502b9b64 | 35 | #include "frame.h" |
4588ec20 JB |
36 | #include "window.h" |
37 | #include "commands.h" | |
38 | #include "disptab.h" | |
39 | #include "indent.h" | |
d169fe39 | 40 | #include "intervals.h" |
4588ec20 | 41 | |
648fa17d | 42 | #include "systty.h" |
a41f8bed | 43 | |
4588ec20 JB |
44 | #ifdef HAVE_X_WINDOWS |
45 | #include "xterm.h" | |
46 | #endif /* HAVE_X_WINDOWS */ | |
47 | ||
6cbd1643 RS |
48 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
49 | #include "systime.h" | |
50 | ||
3883a901 RS |
51 | #include <errno.h> |
52 | ||
4588ec20 JB |
53 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
54 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
55 | ||
4588ec20 JB |
56 | /* Get number of chars of output now in the buffer of a stdio stream. |
57 | This ought to be built in in stdio, but it isn't. | |
58 | Some s- files override this because their stdio internals differ. */ | |
e3271ae5 | 59 | #ifdef __GNU_LIBRARY__ |
097c2824 RM |
60 | /* The s- file might have overridden the definition with one that works for |
61 | the system's C library. But we are using the GNU C library, so this is | |
62 | the right definition for every system. */ | |
3883a901 RS |
63 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
64 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
65 | #else | |
cb5558ff | 66 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 67 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
68 | #endif |
69 | #else /* not __GNU_LIBRARY__ */ | |
cb5558ff | 70 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
71 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
72 | #endif | |
e3271ae5 | 73 | #endif |
4588ec20 | 74 | |
45140e01 RS |
75 | static void change_frame_size_1 (); |
76 | ||
a41f8bed | 77 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 78 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 79 | |
502b9b64 | 80 | int frame_garbaged; |
4588ec20 JB |
81 | |
82 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
83 | ||
84 | int display_completed; | |
85 | ||
86 | /* Lisp variable visible-bell; enables use of screen-flash | |
87 | instead of audible bell. */ | |
88 | ||
89 | int visible_bell; | |
90 | ||
502b9b64 | 91 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
92 | |
93 | int inverse_video; | |
94 | ||
95 | /* Line speed of the terminal. */ | |
96 | ||
97 | int baud_rate; | |
98 | ||
99 | /* nil or a symbol naming the window system under which emacs is | |
100 | running ('x is the only current possibility). */ | |
101 | ||
102 | Lisp_Object Vwindow_system; | |
103 | ||
104 | /* Version number of X windows: 10, 11 or nil. */ | |
105 | Lisp_Object Vwindow_system_version; | |
106 | ||
107 | /* Vector of glyph definitions. Indexed by glyph number, | |
108 | the contents are a string which is how to output the glyph. | |
109 | ||
110 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
111 | as a character code. */ | |
112 | ||
113 | Lisp_Object Vglyph_table; | |
114 | ||
115 | /* Display table to use for vectors that don't specify their own. */ | |
116 | ||
117 | Lisp_Object Vstandard_display_table; | |
118 | ||
119 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
120 | so put cursor on minibuffer after the prompt. |
121 | positive means at end of text in echo area; | |
122 | negative means at beginning of line. */ | |
4588ec20 JB |
123 | int cursor_in_echo_area; |
124 | \f | |
502b9b64 | 125 | /* The currently selected frame. |
87485d6f MW |
126 | In a single-frame version, this variable always holds the address of |
127 | the_only_frame. */ | |
4588ec20 | 128 | |
502b9b64 | 129 | FRAME_PTR selected_frame; |
4588ec20 | 130 | |
502b9b64 JB |
131 | /* A frame which is not just a minibuffer, or 0 if there are no such |
132 | frames. This is usually the most recent such frame that was | |
87485d6f MW |
133 | selected. In a single-frame version, this variable always holds |
134 | the address of the_only_frame. */ | |
502b9b64 | 135 | FRAME_PTR last_nonminibuf_frame; |
e5d77022 | 136 | |
502b9b64 | 137 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
138 | exist inside frame objects lives in the following structure instead. |
139 | ||
140 | NOTE: the_only_frame is not checked for garbage collection; don't | |
eb8c3be9 | 141 | store collectible objects in any of its fields! |
190721ac JB |
142 | |
143 | You're not/The only frame in town/... */ | |
4588ec20 | 144 | |
502b9b64 JB |
145 | #ifndef MULTI_FRAME |
146 | struct frame the_only_frame; | |
e5d77022 | 147 | #endif |
4588ec20 JB |
148 | |
149 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
150 | which is used inside `update_frame' to hold the old contents |
151 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
152 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
153 | /* Length of vector currently allocated. */ |
154 | int ophys_lines_length; | |
155 | ||
156 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
157 | ||
158 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
159 | ||
160 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
161 | ||
4588ec20 | 162 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 163 | \f |
502b9b64 | 164 | #ifdef MULTI_FRAME |
4588ec20 | 165 | |
502b9b64 JB |
166 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
167 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
168 | (frame) | |
169 | Lisp_Object frame; | |
4588ec20 | 170 | { |
502b9b64 | 171 | FRAME_PTR f; |
4588ec20 | 172 | |
502b9b64 JB |
173 | CHECK_LIVE_FRAME (frame, 0); |
174 | f = XFRAME (frame); | |
175 | update_begin (f); | |
4588ec20 | 176 | /* set_terminal_modes (); */ |
502b9b64 | 177 | clear_frame (); |
b6a65ac2 | 178 | clear_frame_records (f); |
502b9b64 | 179 | update_end (f); |
4588ec20 | 180 | fflush (stdout); |
4588ec20 JB |
181 | windows_or_buffers_changed++; |
182 | /* Mark all windows as INaccurate, | |
183 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
184 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
185 | f->garbaged = 0; | |
4588ec20 JB |
186 | return Qnil; |
187 | } | |
188 | ||
502b9b64 JB |
189 | redraw_frame (f) |
190 | FRAME_PTR f; | |
4588ec20 | 191 | { |
502b9b64 | 192 | Lisp_Object frame; |
e9c9a718 | 193 | XSETFRAME (frame, f); |
502b9b64 | 194 | Fredraw_frame (frame); |
4588ec20 JB |
195 | } |
196 | ||
35f56f96 | 197 | #else |
4588ec20 | 198 | |
d8039c5c | 199 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
35f56f96 JB |
200 | "Clear frame FRAME and output again what is supposed to appear on it.") |
201 | (frame) | |
202 | Lisp_Object frame; | |
4588ec20 JB |
203 | { |
204 | update_begin (0); | |
205 | set_terminal_modes (); | |
502b9b64 | 206 | clear_frame (); |
4588ec20 JB |
207 | update_end (0); |
208 | fflush (stdout); | |
502b9b64 | 209 | clear_frame_records (0); |
4588ec20 JB |
210 | windows_or_buffers_changed++; |
211 | /* Mark all windows as INaccurate, | |
212 | so that every window will have its redisplay done. */ | |
b5c685f4 | 213 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
214 | return Qnil; |
215 | } | |
216 | ||
35f56f96 JB |
217 | #endif |
218 | ||
219 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
220 | "Clear and redisplay all visible frames.") | |
221 | () | |
222 | { | |
223 | Lisp_Object tail, frame; | |
224 | ||
225 | FOR_EACH_FRAME (tail, frame) | |
9223a96a | 226 | if (FRAME_VISIBLE_P (XFRAME (frame))) |
35f56f96 JB |
227 | Fredraw_frame (frame); |
228 | ||
229 | return Qnil; | |
230 | } | |
231 | ||
9223a96a RS |
232 | /* This is used when frame_garbaged is set. |
233 | Redraw the individual frames marked as garbaged. */ | |
234 | ||
235 | void | |
236 | redraw_garbaged_frames () | |
237 | { | |
238 | Lisp_Object tail, frame; | |
239 | ||
240 | FOR_EACH_FRAME (tail, frame) | |
241 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
242 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
243 | Fredraw_frame (frame); | |
244 | } | |
245 | ||
4588ec20 | 246 | \f |
502b9b64 JB |
247 | static struct frame_glyphs * |
248 | make_frame_glyphs (frame, empty) | |
249 | register FRAME_PTR frame; | |
4588ec20 JB |
250 | int empty; |
251 | { | |
252 | register int i; | |
502b9b64 JB |
253 | register width = FRAME_WIDTH (frame); |
254 | register height = FRAME_HEIGHT (frame); | |
60a8948a RS |
255 | register struct frame_glyphs *new |
256 | = (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 257 | |
502b9b64 | 258 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
259 | new->height = height; |
260 | new->width = width; | |
261 | new->used = (int *) xmalloc (height * sizeof (int)); | |
262 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
60a8948a | 263 | new->charstarts = (int **) xmalloc (height * sizeof (int *)); |
4588ec20 JB |
264 | new->highlight = (char *) xmalloc (height * sizeof (char)); |
265 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
266 | bzero (new->enable, height * sizeof (char)); | |
267 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
268 | ||
269 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 270 | if (FRAME_X_P (frame)) |
4588ec20 | 271 | { |
4588ec20 JB |
272 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
273 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
274 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
275 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 276 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
277 | } |
278 | #endif | |
279 | ||
280 | if (empty) | |
281 | { | |
282 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 283 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 | 284 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
d52bad65 | 285 | unsigned int total_charstarts = (width + 2) * sizeof (int); |
4588ec20 JB |
286 | |
287 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
288 | bzero (new->total_contents, total_glyphs); | |
d52bad65 RS |
289 | |
290 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
291 | bzero (new->total_charstarts, total_glyphs); | |
4588ec20 JB |
292 | } |
293 | else | |
294 | { | |
295 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
296 | ||
297 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
298 | bzero (new->total_contents, total_glyphs); | |
299 | for (i = 0; i < height; i++) | |
300 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
60a8948a RS |
301 | |
302 | if (!FRAME_TERMCAP_P (frame)) | |
303 | { | |
304 | unsigned int total_charstarts = height * (width + 2) * sizeof (int); | |
305 | ||
306 | new->total_charstarts = (int *) xmalloc (total_charstarts); | |
307 | bzero (new->total_charstarts, total_charstarts); | |
308 | for (i = 0; i < height; i++) | |
309 | new->charstarts[i] = new->total_charstarts + i * (width + 2) + 1; | |
310 | } | |
311 | else | |
312 | { | |
313 | /* Without a window system, we don't really need charstarts. | |
314 | So use a small amount of space to make enough data structure | |
315 | to prevent crashes in display_text_line. */ | |
316 | new->total_charstarts = (int *) xmalloc ((width + 2) * sizeof (int)); | |
317 | for (i = 0; i < height; i++) | |
318 | new->charstarts[i] = new->total_charstarts; | |
319 | } | |
4588ec20 JB |
320 | } |
321 | ||
322 | return new; | |
323 | } | |
324 | ||
05233a7d | 325 | void |
502b9b64 JB |
326 | free_frame_glyphs (frame, glyphs) |
327 | FRAME_PTR frame; | |
328 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
329 | { |
330 | if (glyphs->total_contents) | |
9ac0d9e0 | 331 | xfree (glyphs->total_contents); |
60a8948a RS |
332 | if (glyphs->total_charstarts) |
333 | xfree (glyphs->total_charstarts); | |
4588ec20 | 334 | |
9ac0d9e0 JB |
335 | xfree (glyphs->used); |
336 | xfree (glyphs->glyphs); | |
337 | xfree (glyphs->highlight); | |
338 | xfree (glyphs->enable); | |
339 | xfree (glyphs->bufp); | |
60a8948a RS |
340 | if (glyphs->charstarts) |
341 | xfree (glyphs->charstarts); | |
4588ec20 JB |
342 | |
343 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 344 | if (FRAME_X_P (frame)) |
4588ec20 | 345 | { |
9ac0d9e0 JB |
346 | xfree (glyphs->top_left_x); |
347 | xfree (glyphs->top_left_y); | |
348 | xfree (glyphs->pix_width); | |
349 | xfree (glyphs->pix_height); | |
350 | xfree (glyphs->max_ascent); | |
4588ec20 JB |
351 | } |
352 | #endif | |
353 | ||
9ac0d9e0 | 354 | xfree (glyphs); |
4588ec20 JB |
355 | } |
356 | ||
45140e01 | 357 | void |
502b9b64 JB |
358 | remake_frame_glyphs (frame) |
359 | FRAME_PTR frame; | |
4588ec20 | 360 | { |
502b9b64 JB |
361 | if (FRAME_CURRENT_GLYPHS (frame)) |
362 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
363 | if (FRAME_DESIRED_GLYPHS (frame)) | |
364 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
365 | if (FRAME_TEMP_GLYPHS (frame)) | |
366 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
367 | ||
368 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
369 | { |
370 | /* Reallocate the frame's message buffer; remember that | |
371 | echo_area_glyphs may be pointing here. */ | |
372 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
373 | ||
374 | FRAME_MESSAGE_BUF (frame) | |
375 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
376 | FRAME_WIDTH (frame) + 1); | |
377 | ||
378 | if (echo_area_glyphs == old_message_buf) | |
379 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
380 | if (previous_echo_glyphs == old_message_buf) | |
381 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
382 | } | |
4588ec20 | 383 | else |
502b9b64 JB |
384 | FRAME_MESSAGE_BUF (frame) |
385 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 386 | |
502b9b64 JB |
387 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
388 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
389 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
45140e01 RS |
390 | if (! FRAME_TERMCAP_P (frame) || frame == selected_frame) |
391 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
392 | } |
393 | \f | |
502b9b64 | 394 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
395 | |
396 | static int | |
397 | line_hash_code (m, vpos) | |
502b9b64 | 398 | register struct frame_glyphs *m; |
4588ec20 JB |
399 | int vpos; |
400 | { | |
401 | register GLYPH *body, *end; | |
402 | register int h = 0; | |
403 | ||
404 | if (!m->enable[vpos]) | |
405 | return 0; | |
406 | ||
94aa5d2d | 407 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
408 | so as to encourage scrolling to leave them in place. */ |
409 | if (m->highlight[vpos]) | |
410 | return -1; | |
411 | ||
412 | body = m->glyphs[vpos]; | |
413 | ||
414 | if (must_write_spaces) | |
415 | while (1) | |
416 | { | |
417 | GLYPH g = *body++; | |
418 | ||
419 | if (g == 0) | |
420 | break; | |
421 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
422 | } | |
423 | else | |
424 | while (1) | |
425 | { | |
426 | GLYPH g = *body++; | |
427 | ||
428 | if (g == 0) | |
429 | break; | |
430 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
431 | } | |
432 | ||
433 | if (h) | |
434 | return h; | |
435 | return 1; | |
436 | } | |
437 | ||
438 | /* Return number of characters in line in M at vpos VPOS, | |
439 | except don't count leading and trailing spaces | |
440 | unless the terminal requires those to be explicitly output. */ | |
441 | ||
442 | static unsigned int | |
443 | line_draw_cost (m, vpos) | |
502b9b64 | 444 | struct frame_glyphs *m; |
4588ec20 JB |
445 | int vpos; |
446 | { | |
447 | register GLYPH *beg = m->glyphs[vpos]; | |
448 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
449 | register int i; | |
450 | register int tlen = GLYPH_TABLE_LENGTH; | |
451 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
452 | ||
453 | /* Ignore trailing and leading spaces if we can. */ | |
454 | if (!must_write_spaces) | |
455 | { | |
456 | while ((end != beg) && (*end == SPACEGLYPH)) | |
457 | --end; | |
458 | if (end == beg) | |
459 | return (0); /* All blank line. */ | |
460 | ||
461 | while (*beg == SPACEGLYPH) | |
462 | ++beg; | |
463 | } | |
464 | ||
465 | /* If we don't have a glyph-table, each glyph is one character, | |
466 | so return the number of glyphs. */ | |
467 | if (tbase == 0) | |
468 | return end - beg; | |
469 | ||
470 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
471 | i = 0; | |
472 | while ((beg <= end) && *beg) | |
473 | { | |
474 | register GLYPH g = *beg++; | |
475 | ||
476 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
477 | i += 1; | |
478 | else | |
479 | i += GLYPH_LENGTH (tbase, g); | |
480 | } | |
481 | return i; | |
482 | } | |
483 | \f | |
484 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
485 | ||
486 | The only other interface into redisplay is through setting | |
502b9b64 JB |
487 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
488 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
489 | |
490 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
491 | ||
502b9b64 | 492 | cancel_line (vpos, frame) |
4588ec20 | 493 | int vpos; |
502b9b64 | 494 | register FRAME_PTR frame; |
4588ec20 | 495 | { |
502b9b64 | 496 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
497 | } |
498 | ||
502b9b64 JB |
499 | clear_frame_records (frame) |
500 | register FRAME_PTR frame; | |
4588ec20 | 501 | { |
502b9b64 | 502 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
503 | } |
504 | ||
836d2cde RS |
505 | /* Clear out all display lines for a coming redisplay. */ |
506 | ||
507 | void | |
508 | init_desired_glyphs (frame) | |
509 | register FRAME_PTR frame; | |
510 | { | |
511 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
512 | int vpos; | |
513 | int height = FRAME_HEIGHT (frame); | |
514 | ||
515 | for (vpos = 0; vpos < height; vpos++) | |
516 | desired_glyphs->enable[vpos] = 0; | |
517 | } | |
518 | ||
4588ec20 JB |
519 | /* Prepare to display on line VPOS starting at HPOS within it. */ |
520 | ||
521 | void | |
502b9b64 JB |
522 | get_display_line (frame, vpos, hpos) |
523 | register FRAME_PTR frame; | |
4588ec20 JB |
524 | int vpos; |
525 | register int hpos; | |
526 | { | |
502b9b64 JB |
527 | register struct frame_glyphs *glyphs; |
528 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
529 | register GLYPH *p; |
530 | ||
7c3c72ec | 531 | if (vpos < 0) |
4588ec20 JB |
532 | abort (); |
533 | ||
534 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
535 | abort (); | |
536 | ||
537 | if (! desired_glyphs->enable[vpos]) | |
538 | { | |
539 | desired_glyphs->used[vpos] = 0; | |
540 | desired_glyphs->highlight[vpos] = 0; | |
541 | desired_glyphs->enable[vpos] = 1; | |
542 | } | |
543 | ||
544 | if (hpos > desired_glyphs->used[vpos]) | |
545 | { | |
546 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
547 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
548 | ||
549 | desired_glyphs->used[vpos] = hpos; | |
550 | while (g != end) | |
551 | *g++ = SPACEGLYPH; | |
552 | } | |
553 | } | |
554 | ||
555 | /* Like bcopy except never gets confused by overlap. */ | |
556 | ||
557 | void | |
558 | safe_bcopy (from, to, size) | |
559 | char *from, *to; | |
560 | int size; | |
561 | { | |
b5c685f4 | 562 | if (size <= 0 || from == to) |
4588ec20 JB |
563 | return; |
564 | ||
b5c685f4 JB |
565 | /* If the source and destination don't overlap, then bcopy can |
566 | handle it. If they do overlap, but the destination is lower in | |
567 | memory than the source, we'll assume bcopy can handle that. */ | |
568 | if (to < from || from + size <= to) | |
569 | bcopy (from, to, size); | |
570 | ||
571 | /* Otherwise, we'll copy from the end. */ | |
572 | else | |
4588ec20 | 573 | { |
b5c685f4 JB |
574 | register char *endf = from + size; |
575 | register char *endt = to + size; | |
4588ec20 JB |
576 | |
577 | /* If TO - FROM is large, then we should break the copy into | |
578 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
579 | TO - FROM is small, then the bcopy function call overhead | |
580 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
581 | anywhere. Since I don't think the obvious copy loop is too |
582 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
583 | if (to - from < 64) |
584 | { | |
585 | do | |
586 | *--endt = *--endf; | |
587 | while (endf != from); | |
588 | } | |
589 | else | |
590 | { | |
b5c685f4 | 591 | for (;;) |
4588ec20 JB |
592 | { |
593 | endt -= (to - from); | |
594 | endf -= (to - from); | |
595 | ||
b5c685f4 JB |
596 | if (endt < to) |
597 | break; | |
598 | ||
4588ec20 JB |
599 | bcopy (endf, endt, to - from); |
600 | } | |
b5c685f4 JB |
601 | |
602 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
603 | little left over. The amount left over is |
604 | (endt + (to - from)) - to, which is endt - from. */ | |
605 | bcopy (from, to, endt - from); | |
606 | } | |
607 | } | |
4588ec20 JB |
608 | } |
609 | ||
98038dc0 | 610 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
611 | DISTANCE may be negative. */ |
612 | ||
613 | static void | |
614 | rotate_vector (vector, size, distance) | |
615 | char *vector; | |
616 | int size; | |
617 | int distance; | |
618 | { | |
619 | char *temp = (char *) alloca (size); | |
620 | ||
621 | if (distance < 0) | |
622 | distance += size; | |
623 | ||
624 | bcopy (vector, temp + distance, size - distance); | |
625 | bcopy (vector + size - distance, temp, distance); | |
626 | bcopy (temp, vector, size); | |
627 | } | |
628 | ||
629 | /* Scroll lines from vpos FROM up to but not including vpos END | |
630 | down by AMOUNT lines (AMOUNT may be negative). | |
631 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
632 | ||
633 | int | |
d52bad65 | 634 | scroll_frame_lines (frame, from, end, amount, newpos) |
502b9b64 | 635 | register FRAME_PTR frame; |
d52bad65 | 636 | int from, end, amount, newpos; |
4588ec20 JB |
637 | { |
638 | register int i; | |
502b9b64 JB |
639 | register struct frame_glyphs *current_frame |
640 | = FRAME_CURRENT_GLYPHS (frame); | |
d52bad65 | 641 | int pos_adjust; |
23b0200c | 642 | int width = FRAME_WIDTH (frame); |
4588ec20 JB |
643 | |
644 | if (!line_ins_del_ok) | |
645 | return 0; | |
646 | ||
647 | if (amount == 0) | |
648 | return 1; | |
649 | ||
650 | if (amount > 0) | |
651 | { | |
502b9b64 | 652 | update_begin (frame); |
4588ec20 JB |
653 | set_terminal_window (end + amount); |
654 | if (!scroll_region_ok) | |
655 | ins_del_lines (end, -amount); | |
656 | ins_del_lines (from, amount); | |
657 | set_terminal_window (0); | |
658 | ||
502b9b64 | 659 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
660 | sizeof (GLYPH *) * (end + amount - from), |
661 | amount * sizeof (GLYPH *)); | |
662 | ||
60a8948a | 663 | rotate_vector (current_frame->charstarts + from, |
d52bad65 RS |
664 | sizeof (int *) * (end + amount - from), |
665 | amount * sizeof (int *)); | |
666 | ||
23b0200c RS |
667 | safe_bcopy (current_frame->used + from, |
668 | current_frame->used + from + amount, | |
669 | (end - from) * sizeof current_frame->used[0]); | |
670 | ||
671 | safe_bcopy (current_frame->highlight + from, | |
672 | current_frame->highlight + from + amount, | |
673 | (end - from) * sizeof current_frame->highlight[0]); | |
674 | ||
675 | safe_bcopy (current_frame->enable + from, | |
676 | current_frame->enable + from + amount, | |
677 | (end - from) * sizeof current_frame->enable[0]); | |
678 | ||
d52bad65 RS |
679 | /* Adjust the lines by an amount |
680 | that puts the first of them at NEWPOS. */ | |
23b0200c | 681 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
682 | |
683 | /* Offset each char position in the charstarts lines we moved | |
684 | by pos_adjust. */ | |
23b0200c | 685 | for (i = from + amount; i < end + amount; i++) |
60a8948a | 686 | { |
d52bad65 | 687 | int *line = current_frame->charstarts[i]; |
60a8948a | 688 | int col; |
23b0200c RS |
689 | for (col = 0; col < width; col++) |
690 | if (line[col] > 0) | |
691 | line[col] += pos_adjust; | |
60a8948a | 692 | } |
23b0200c | 693 | for (i = from; i < from + amount; i++) |
60a8948a | 694 | { |
d52bad65 | 695 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
696 | int col; |
697 | line[0] = -1; | |
23b0200c | 698 | for (col = 0; col < width; col++) |
60a8948a RS |
699 | line[col] = 0; |
700 | } | |
701 | ||
4588ec20 JB |
702 | /* Mark the lines made empty by scrolling as enabled, empty and |
703 | normal video. */ | |
502b9b64 JB |
704 | bzero (current_frame->used + from, |
705 | amount * sizeof current_frame->used[0]); | |
706 | bzero (current_frame->highlight + from, | |
707 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
708 | for (i = from; i < from + amount; i++) |
709 | { | |
502b9b64 | 710 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 711 | current_frame->charstarts[i][0] = -1; |
502b9b64 | 712 | current_frame->enable[i] = 1; |
4588ec20 JB |
713 | } |
714 | ||
502b9b64 JB |
715 | safe_bcopy (current_frame->bufp + from, |
716 | current_frame->bufp + from + amount, | |
717 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
718 | |
719 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 720 | if (FRAME_X_P (frame)) |
4588ec20 | 721 | { |
502b9b64 JB |
722 | safe_bcopy (current_frame->top_left_x + from, |
723 | current_frame->top_left_x + from + amount, | |
724 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 725 | |
502b9b64 JB |
726 | safe_bcopy (current_frame->top_left_y + from, |
727 | current_frame->top_left_y + from + amount, | |
728 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 729 | |
502b9b64 JB |
730 | safe_bcopy (current_frame->pix_width + from, |
731 | current_frame->pix_width + from + amount, | |
732 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 733 | |
502b9b64 JB |
734 | safe_bcopy (current_frame->pix_height + from, |
735 | current_frame->pix_height + from + amount, | |
736 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
737 | |
738 | safe_bcopy (current_frame->max_ascent + from, | |
739 | current_frame->max_ascent + from + amount, | |
740 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
741 | } |
742 | #endif /* HAVE_X_WINDOWS */ | |
743 | ||
502b9b64 | 744 | update_end (frame); |
4588ec20 JB |
745 | } |
746 | if (amount < 0) | |
747 | { | |
502b9b64 | 748 | update_begin (frame); |
4588ec20 JB |
749 | set_terminal_window (end); |
750 | ins_del_lines (from + amount, amount); | |
751 | if (!scroll_region_ok) | |
752 | ins_del_lines (end + amount, -amount); | |
753 | set_terminal_window (0); | |
754 | ||
502b9b64 | 755 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
756 | sizeof (GLYPH *) * (end - from - amount), |
757 | amount * sizeof (GLYPH *)); | |
758 | ||
60a8948a | 759 | rotate_vector (current_frame->charstarts + from + amount, |
d52bad65 RS |
760 | sizeof (int *) * (end - from - amount), |
761 | amount * sizeof (int *)); | |
762 | ||
23b0200c RS |
763 | safe_bcopy (current_frame->used + from, |
764 | current_frame->used + from + amount, | |
765 | (end - from) * sizeof current_frame->used[0]); | |
766 | ||
767 | safe_bcopy (current_frame->highlight + from, | |
768 | current_frame->highlight + from + amount, | |
769 | (end - from) * sizeof current_frame->highlight[0]); | |
770 | ||
771 | safe_bcopy (current_frame->enable + from, | |
772 | current_frame->enable + from + amount, | |
773 | (end - from) * sizeof current_frame->enable[0]); | |
774 | ||
d52bad65 RS |
775 | /* Adjust the lines by an amount |
776 | that puts the first of them at NEWPOS. */ | |
23b0200c | 777 | pos_adjust = newpos - current_frame->charstarts[from + amount][0]; |
60a8948a RS |
778 | |
779 | /* Offset each char position in the charstarts lines we moved | |
780 | by pos_adjust. */ | |
781 | for (i = from + amount; i < end + amount; i++) | |
782 | { | |
d52bad65 | 783 | int *line = current_frame->charstarts[i]; |
60a8948a | 784 | int col; |
23b0200c RS |
785 | for (col = 0; col < width; col++) |
786 | if (line[col] > 0) | |
787 | line[col] += pos_adjust; | |
60a8948a | 788 | } |
23b0200c | 789 | for (i = end + amount; i < end; i++) |
60a8948a | 790 | { |
d52bad65 | 791 | int *line = current_frame->charstarts[i]; |
60a8948a RS |
792 | int col; |
793 | line[0] = -1; | |
23b0200c | 794 | for (col = 0; col < width; col++) |
60a8948a RS |
795 | line[col] = 0; |
796 | } | |
797 | ||
4588ec20 JB |
798 | /* Mark the lines made empty by scrolling as enabled, empty and |
799 | normal video. */ | |
502b9b64 JB |
800 | bzero (current_frame->used + end + amount, |
801 | - amount * sizeof current_frame->used[0]); | |
802 | bzero (current_frame->highlight + end + amount, | |
803 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
804 | for (i = end + amount; i < end; i++) |
805 | { | |
502b9b64 | 806 | current_frame->glyphs[i][0] = '\0'; |
60a8948a | 807 | current_frame->charstarts[i][0] = 0; |
502b9b64 | 808 | current_frame->enable[i] = 1; |
4588ec20 JB |
809 | } |
810 | ||
502b9b64 JB |
811 | safe_bcopy (current_frame->bufp + from, |
812 | current_frame->bufp + from + amount, | |
813 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
814 | |
815 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 816 | if (FRAME_X_P (frame)) |
4588ec20 | 817 | { |
502b9b64 JB |
818 | safe_bcopy (current_frame->top_left_x + from, |
819 | current_frame->top_left_x + from + amount, | |
820 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 821 | |
502b9b64 JB |
822 | safe_bcopy (current_frame->top_left_y + from, |
823 | current_frame->top_left_y + from + amount, | |
824 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 825 | |
502b9b64 JB |
826 | safe_bcopy (current_frame->pix_width + from, |
827 | current_frame->pix_width + from + amount, | |
828 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 829 | |
502b9b64 JB |
830 | safe_bcopy (current_frame->pix_height + from, |
831 | current_frame->pix_height + from + amount, | |
832 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
833 | |
834 | safe_bcopy (current_frame->max_ascent + from, | |
835 | current_frame->max_ascent + from + amount, | |
836 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
837 | } |
838 | #endif /* HAVE_X_WINDOWS */ | |
839 | ||
502b9b64 | 840 | update_end (frame); |
4588ec20 JB |
841 | } |
842 | return 1; | |
843 | } | |
844 | \f | |
502b9b64 | 845 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 846 | copy all the columns that W does not occupy |
502b9b64 JB |
847 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
848 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
849 | |
850 | preserve_other_columns (w) | |
851 | struct window *w; | |
852 | { | |
853 | register int vpos; | |
502b9b64 JB |
854 | register struct frame_glyphs *current_frame, *desired_frame; |
855 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
856 | int start = XFASTINT (w->left); |
857 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
858 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
859 | ||
502b9b64 JB |
860 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
861 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
862 | |
863 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
864 | { | |
502b9b64 | 865 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
866 | { |
867 | if (start > 0) | |
868 | { | |
869 | int len; | |
870 | ||
502b9b64 | 871 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 | 872 | desired_frame->glyphs[vpos], |
4b34bd81 | 873 | start * sizeof (current_frame->glyphs[vpos][0])); |
60a8948a RS |
874 | bcopy (current_frame->charstarts[vpos], |
875 | desired_frame->charstarts[vpos], | |
4b34bd81 | 876 | start * sizeof (current_frame->charstarts[vpos][0])); |
502b9b64 JB |
877 | len = min (start, current_frame->used[vpos]); |
878 | if (desired_frame->used[vpos] < len) | |
879 | desired_frame->used[vpos] = len; | |
4588ec20 | 880 | } |
502b9b64 JB |
881 | if (current_frame->used[vpos] > end |
882 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 883 | { |
502b9b64 | 884 | while (desired_frame->used[vpos] < end) |
60a8948a RS |
885 | { |
886 | int used = desired_frame->used[vpos]++; | |
887 | desired_frame->glyphs[vpos][used] = SPACEGLYPH; | |
888 | desired_frame->glyphs[vpos][used] = 0; | |
889 | } | |
502b9b64 JB |
890 | bcopy (current_frame->glyphs[vpos] + end, |
891 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 | 892 | ((current_frame->used[vpos] - end) |
4b34bd81 | 893 | * sizeof (current_frame->glyphs[vpos][0]))); |
60a8948a RS |
894 | bcopy (current_frame->charstarts[vpos] + end, |
895 | desired_frame->charstarts[vpos] + end, | |
896 | ((current_frame->used[vpos] - end) | |
4b34bd81 | 897 | * sizeof (current_frame->charstarts[vpos][0]))); |
502b9b64 | 898 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
899 | } |
900 | } | |
901 | } | |
902 | } | |
903 | \f | |
904 | #if 0 | |
905 | ||
502b9b64 | 906 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 907 | copy all the columns that w does occupy |
502b9b64 JB |
908 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
909 | so that update_frame will not change those columns. | |
4588ec20 JB |
910 | |
911 | Have not been able to figure out how to use this correctly. */ | |
912 | ||
913 | preserve_my_columns (w) | |
914 | struct window *w; | |
915 | { | |
916 | register int vpos, fin; | |
502b9b64 JB |
917 | register struct frame_glyphs *l1, *l2; |
918 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
919 | int start = XFASTINT (w->left); |
920 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
921 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
922 | ||
923 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
924 | { | |
502b9b64 JB |
925 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
926 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
927 | { |
928 | if (l2->length > start && l1->length < l2->length) | |
929 | { | |
930 | fin = l2->length; | |
931 | if (fin > end) fin = end; | |
932 | while (l1->length < start) | |
933 | l1->body[l1->length++] = ' '; | |
934 | bcopy (l2->body + start, l1->body + start, fin - start); | |
935 | l1->length = fin; | |
936 | } | |
937 | } | |
938 | } | |
939 | } | |
940 | ||
941 | #endif | |
942 | \f | |
b64b3980 | 943 | /* Adjust by ADJUST the charstart values in window W |
23b0200c | 944 | after vpos VPOS, which counts relative to the frame |
b64b3980 RS |
945 | (not relative to W itself). */ |
946 | ||
947 | void | |
948 | adjust_window_charstarts (w, vpos, adjust) | |
949 | struct window *w; | |
950 | int vpos; | |
951 | int adjust; | |
952 | { | |
953 | int left = XFASTINT (w->left); | |
954 | int top = XFASTINT (w->top); | |
23b0200c RS |
955 | int right = left + window_internal_width (w); |
956 | int bottom = top + window_internal_height (w); | |
b64b3980 RS |
957 | int i; |
958 | ||
23b0200c | 959 | for (i = vpos + 1; i < bottom; i++) |
b64b3980 RS |
960 | { |
961 | int *charstart | |
962 | = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[i]; | |
963 | int j; | |
964 | for (j = left; j < right; j++) | |
965 | if (charstart[j] > 0) | |
966 | charstart[j] += adjust; | |
967 | } | |
968 | } | |
23b0200c | 969 | |
352f1545 RS |
970 | /* Check the charstarts values in the area of window W |
971 | for internal consistency. We cannot check that they are "right"; | |
972 | we can only look for something nonsensical. */ | |
973 | ||
23b0200c RS |
974 | verify_charstarts (w) |
975 | struct window *w; | |
976 | { | |
977 | FRAME_PTR f = XFRAME (WINDOW_FRAME (w)); | |
978 | int i; | |
979 | int top = XFASTINT (w->top); | |
980 | int bottom = top + window_internal_height (w); | |
981 | int left = XFASTINT (w->left); | |
982 | int right = left + window_internal_width (w); | |
983 | int next_line; | |
352f1545 RS |
984 | int truncate = (XINT (w->hscroll) |
985 | || (truncate_partial_width_windows | |
986 | && (XFASTINT (w->width) < FRAME_WIDTH (f))) | |
987 | || !NILP (XBUFFER (w->buffer)->truncate_lines)); | |
23b0200c RS |
988 | |
989 | for (i = top; i < bottom; i++) | |
990 | { | |
991 | int j; | |
992 | int last; | |
352f1545 | 993 | int *charstart = FRAME_CURRENT_GLYPHS (f)->charstarts[i]; |
23b0200c RS |
994 | |
995 | if (i != top) | |
352f1545 RS |
996 | { |
997 | if (truncate) | |
998 | { | |
999 | /* If we are truncating lines, allow a jump | |
1000 | in charstarts from one line to the next. */ | |
1001 | if (charstart[left] < next_line) | |
1002 | abort (); | |
1003 | } | |
1004 | else | |
1005 | { | |
1006 | if (charstart[left] != next_line) | |
1007 | abort (); | |
1008 | } | |
1009 | } | |
23b0200c RS |
1010 | |
1011 | for (j = left; j < right; j++) | |
1012 | if (charstart[j] > 0) | |
1013 | last = charstart[j]; | |
2e8907d3 RS |
1014 | /* Record where the next line should start. */ |
1015 | next_line = last; | |
1016 | if (BUF_ZV (XBUFFER (w->buffer)) != last) | |
1017 | { | |
1018 | /* If there's a newline between the two lines, count that. */ | |
1019 | int endchar = *BUF_CHAR_ADDRESS (XBUFFER (w->buffer), last); | |
1020 | if (endchar == '\n') | |
1021 | next_line++; | |
1022 | } | |
23b0200c RS |
1023 | } |
1024 | } | |
b64b3980 | 1025 | \f |
4588ec20 JB |
1026 | /* On discovering that the redisplay for a window was no good, |
1027 | cancel the columns of that window, so that when the window is | |
1028 | displayed over again get_display_line will not complain. */ | |
1029 | ||
1030 | cancel_my_columns (w) | |
1031 | struct window *w; | |
1032 | { | |
1033 | register int vpos; | |
60a8948a RS |
1034 | register struct frame_glyphs *desired_glyphs |
1035 | = FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
1036 | register int start = XFASTINT (w->left); |
1037 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
1038 | ||
1039 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
1040 | if (desired_glyphs->enable[vpos] | |
1041 | && desired_glyphs->used[vpos] >= start) | |
1042 | desired_glyphs->used[vpos] = start; | |
1043 | } | |
1044 | \f | |
502b9b64 | 1045 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
1046 | the necessary output for one change in the buffer. |
1047 | They may return 0 meaning nothing was done if anything is difficult, | |
1048 | or 1 meaning the output was performed properly. | |
502b9b64 | 1049 | They assume that the frame was up to date before the buffer |
94aa5d2d | 1050 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
1051 | see command_loop_1 where these are called. */ |
1052 | ||
1053 | int | |
1054 | direct_output_for_insert (g) | |
1055 | int g; | |
1056 | { | |
502b9b64 JB |
1057 | register FRAME_PTR frame = selected_frame; |
1058 | register struct frame_glyphs *current_frame | |
1059 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
1060 | |
1061 | #ifndef COMPILER_REGISTER_BUG | |
1062 | register | |
1063 | #endif /* COMPILER_REGISTER_BUG */ | |
1064 | struct window *w = XWINDOW (selected_window); | |
1065 | #ifndef COMPILER_REGISTER_BUG | |
1066 | register | |
1067 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1068 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
1069 | #ifndef COMPILER_REGISTER_BUG |
1070 | register | |
1071 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 1072 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 1073 | |
fa61c701 JB |
1074 | /* Give up if about to continue line. */ |
1075 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
1076 | ||
4588ec20 JB |
1077 | /* Avoid losing if cursor is in invisible text off left margin */ |
1078 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
1079 | ||
1080 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 1081 | || cursor_in_echo_area |
502b9b64 JB |
1082 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
1083 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 1084 | |
502b9b64 | 1085 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
1086 | || !display_completed |
1087 | ||
1088 | /* Give up if buffer appears in two places. */ | |
1089 | || buffer_shared > 1 | |
1090 | ||
d169fe39 RS |
1091 | #ifdef USE_TEXT_PROPERTIES |
1092 | /* Intervals have already been adjusted, point is after the | |
1093 | character that was just inserted. */ | |
ef4d2f9e | 1094 | /* Give up if character is invisible. */ |
d169fe39 RS |
1095 | /* Give up if character has a face property. |
1096 | At the moment we only lose at end of line or end of buffer | |
1097 | and only with faces that have some background */ | |
1098 | /* Instead of wasting time, give up if character has any text properties */ | |
254277e1 | 1099 | || ! NILP (Ftext_properties_at (make_number (point - 1), Qnil)) |
d169fe39 RS |
1100 | #endif |
1101 | ||
4588ec20 JB |
1102 | /* Give up if w is minibuffer and a message is being displayed there */ |
1103 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
1104 | return 0; | |
1105 | ||
517b2e01 | 1106 | { |
19dff8dc | 1107 | int face = 0; |
87485d6f | 1108 | #ifdef HAVE_FACES |
517b2e01 | 1109 | int dummy; |
19dff8dc RS |
1110 | |
1111 | if (FRAME_X_P (frame)) | |
ea62c5a5 | 1112 | face = compute_char_face (frame, w, point - 1, -1, -1, &dummy, point, 0); |
517b2e01 | 1113 | #endif |
a1c3de84 | 1114 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (frame, g, face); |
839c7dfb RS |
1115 | current_frame->charstarts[vpos][hpos] = point - 1; |
1116 | /* Record the entry for after the newly inserted character. */ | |
1117 | current_frame->charstarts[vpos][hpos + 1] = point; | |
b64b3980 | 1118 | adjust_window_charstarts (w, vpos, 1); |
517b2e01 | 1119 | } |
4588ec20 JB |
1120 | unchanged_modified = MODIFF; |
1121 | beg_unchanged = GPT - BEG; | |
a5d8b611 KH |
1122 | XSETFASTINT (w->last_point, point); |
1123 | XSETFASTINT (w->last_point_x, hpos); | |
1124 | XSETFASTINT (w->last_modified, MODIFF); | |
4588ec20 JB |
1125 | |
1126 | reassert_line_highlight (0, vpos); | |
502b9b64 | 1127 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 1128 | fflush (stdout); |
502b9b64 JB |
1129 | ++FRAME_CURSOR_X (frame); |
1130 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 1131 | { |
502b9b64 JB |
1132 | current_frame->used[vpos] = hpos + 1; |
1133 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
1134 | } |
1135 | ||
1136 | return 1; | |
1137 | } | |
1138 | ||
1139 | int | |
1140 | direct_output_forward_char (n) | |
1141 | int n; | |
1142 | { | |
502b9b64 | 1143 | register FRAME_PTR frame = selected_frame; |
4588ec20 | 1144 | register struct window *w = XWINDOW (selected_window); |
254277e1 | 1145 | Lisp_Object position; |
ea0d86af RS |
1146 | int hpos = FRAME_CURSOR_X (frame); |
1147 | ||
1148 | /* Give up if in truncated text at end of line. */ | |
1149 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1) | |
1150 | return 0; | |
1151 | ||
a9764248 JB |
1152 | /* Avoid losing if cursor is in invisible text off left margin |
1153 | or about to go off either side of window. */ | |
502b9b64 | 1154 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
1155 | && (XINT (w->hscroll) || n < 0)) |
1156 | || (n > 0 | |
fa61c701 | 1157 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 1158 | || cursor_in_echo_area) |
4588ec20 | 1159 | return 0; |
15874c59 | 1160 | |
de83c314 RS |
1161 | /* Can't use direct output if highlighting a region. */ |
1162 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
1163 | return 0; | |
1164 | ||
15874c59 KH |
1165 | /* Can't use direct output at an overlay boundary; it might have |
1166 | before-string or after-string properties. */ | |
1167 | if (overlay_touches_p (PT) || overlay_touches_p (PT - n)) | |
1168 | return 0; | |
1169 | ||
d169fe39 RS |
1170 | #ifdef USE_TEXT_PROPERTIES |
1171 | /* Don't use direct output next to an invisible character | |
1172 | since we might need to do something special. */ | |
1173 | ||
a5d8b611 | 1174 | XSETFASTINT (position, point); |
2f24f5ac | 1175 | if (XFASTINT (position) < ZV |
294634fb | 1176 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1177 | Qinvisible, |
294634fb KH |
1178 | selected_window))) |
1179 | return 0; | |
d169fe39 | 1180 | |
a5d8b611 | 1181 | XSETFASTINT (position, point - 1); |
2f24f5ac | 1182 | if (XFASTINT (position) >= BEGV |
294634fb | 1183 | && ! NILP (Fget_char_property (position, |
2f24f5ac | 1184 | Qinvisible, |
294634fb KH |
1185 | selected_window))) |
1186 | return 0; | |
d169fe39 RS |
1187 | #endif |
1188 | ||
502b9b64 | 1189 | FRAME_CURSOR_X (frame) += n; |
a5d8b611 KH |
1190 | XSETFASTINT (w->last_point_x, FRAME_CURSOR_X (frame)); |
1191 | XSETFASTINT (w->last_point, point); | |
502b9b64 | 1192 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 | 1193 | fflush (stdout); |
d169fe39 | 1194 | |
4588ec20 JB |
1195 | return 1; |
1196 | } | |
1197 | \f | |
1198 | static void update_line (); | |
1199 | ||
502b9b64 | 1200 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
1201 | Value is nonzero if redisplay stopped due to pending input. |
1202 | FORCE nonzero means do not stop for pending input. */ | |
1203 | ||
1204 | int | |
502b9b64 JB |
1205 | update_frame (f, force, inhibit_hairy_id) |
1206 | FRAME_PTR f; | |
4588ec20 JB |
1207 | int force; |
1208 | int inhibit_hairy_id; | |
1209 | { | |
54633da0 | 1210 | register struct frame_glyphs *current_frame; |
7098a0fa | 1211 | register struct frame_glyphs *desired_frame = 0; |
4588ec20 JB |
1212 | register int i; |
1213 | int pause; | |
1214 | int preempt_count = baud_rate / 2400 + 1; | |
1215 | extern input_pending; | |
1216 | #ifdef HAVE_X_WINDOWS | |
1217 | register int downto, leftmost; | |
1218 | #endif | |
1219 | ||
c37e4889 RS |
1220 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
1221 | calculate_costs (f); | |
1222 | ||
d88c2b9e RS |
1223 | if (preempt_count <= 0) |
1224 | preempt_count = 1; | |
1225 | ||
502b9b64 | 1226 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1227 | |
1228 | detect_input_pending (); | |
1229 | if (input_pending && !force) | |
1230 | { | |
1231 | pause = 1; | |
1232 | goto do_pause; | |
1233 | } | |
1234 | ||
502b9b64 | 1235 | update_begin (f); |
4588ec20 JB |
1236 | |
1237 | if (!line_ins_del_ok) | |
1238 | inhibit_hairy_id = 1; | |
1239 | ||
7098a0fa RS |
1240 | /* These are separate to avoid a possible bug in the AIX C compiler. */ |
1241 | current_frame = FRAME_CURRENT_GLYPHS (f); | |
1242 | desired_frame = FRAME_DESIRED_GLYPHS (f); | |
1243 | ||
efb859b4 JB |
1244 | /* See if any of the desired lines are enabled; don't compute for |
1245 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
1246 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
1247 | if (desired_frame->enable[i]) | |
4588ec20 JB |
1248 | break; |
1249 | ||
1250 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
1251 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
1252 | force |= scrolling (f); | |
4588ec20 JB |
1253 | |
1254 | /* Update the individual lines as needed. Do bottom line first. */ | |
1255 | ||
502b9b64 JB |
1256 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
1257 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
1258 | |
1259 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1260 | if (FRAME_X_P (f)) |
4588ec20 | 1261 | { |
502b9b64 JB |
1262 | leftmost = downto = f->display.x->internal_border_width; |
1263 | if (desired_frame->enable[0]) | |
4588ec20 | 1264 | { |
502b9b64 JB |
1265 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
1266 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
1267 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 1268 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
1269 | current_frame->top_left_x[0] = leftmost; |
1270 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
1271 | } |
1272 | } | |
1273 | #endif /* HAVE_X_WINDOWS */ | |
1274 | ||
1275 | /* Now update the rest of the lines. */ | |
502b9b64 | 1276 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1277 | { |
502b9b64 | 1278 | if (desired_frame->enable[i]) |
4588ec20 | 1279 | { |
b6a65ac2 | 1280 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1281 | { |
1282 | /* Flush out every so many lines. | |
1283 | Also flush out if likely to have more than 1k buffered | |
1284 | otherwise. I'm told that some telnet connections get | |
1285 | really screwed by more than 1k output at once. */ | |
1286 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1287 | if (outq > 900 | |
1288 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1289 | { | |
1290 | fflush (stdout); | |
1291 | if (preempt_count == 1) | |
1292 | { | |
a41f8bed JB |
1293 | #ifdef EMACS_OUTQSIZE |
1294 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1295 | /* Probably not a tty. Ignore the error and reset |
1296 | * the outq count. */ | |
1297 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1298 | #endif | |
1299 | outq *= 10; | |
d520f0d2 | 1300 | if (baud_rate <= outq && baud_rate > 0) |
d88c2b9e | 1301 | sleep (outq / baud_rate); |
4588ec20 JB |
1302 | } |
1303 | } | |
1304 | if ((i - 1) % preempt_count == 0) | |
1305 | detect_input_pending (); | |
1306 | } | |
1307 | ||
502b9b64 | 1308 | update_line (f, i); |
4588ec20 | 1309 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1310 | if (FRAME_X_P (f)) |
4588ec20 | 1311 | { |
502b9b64 JB |
1312 | current_frame->top_left_y[i] = downto; |
1313 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1314 | } |
1315 | #endif /* HAVE_X_WINDOWS */ | |
1316 | } | |
1317 | ||
e5d77022 | 1318 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1319 | if (FRAME_X_P (f)) |
448fd7c0 | 1320 | downto += current_frame->pix_height[i]; |
e5d77022 | 1321 | #endif |
4588ec20 | 1322 | } |
502b9b64 | 1323 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1324 | |
1325 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1326 | if (!pause) | |
1327 | { | |
648fa17d | 1328 | if (cursor_in_echo_area |
698e4c1c KH |
1329 | && FRAME_HAS_MINIBUF_P (f) |
1330 | && EQ (FRAME_MINIBUF_WINDOW (f), minibuf_window)) | |
1113d9db | 1331 | { |
648fa17d JB |
1332 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1333 | int row, col; | |
1334 | ||
1335 | if (cursor_in_echo_area < 0) | |
1336 | { | |
1337 | row = top; | |
1338 | col = 0; | |
1339 | } | |
1113d9db | 1340 | else |
648fa17d JB |
1341 | { |
1342 | /* If the minibuffer is several lines high, find the last | |
1343 | line that has any text on it. */ | |
1344 | row = FRAME_HEIGHT (f); | |
1345 | do | |
1346 | { | |
1347 | row--; | |
1348 | if (current_frame->enable[row]) | |
1349 | col = current_frame->used[row]; | |
1350 | else | |
1351 | col = 0; | |
1352 | } | |
1353 | while (row > top && col == 0); | |
1354 | ||
1355 | if (col >= FRAME_WIDTH (f)) | |
1356 | { | |
1357 | col = 0; | |
1358 | if (row < FRAME_HEIGHT (f) - 1) | |
1359 | row++; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | cursor_to (row, col); | |
1113d9db | 1364 | } |
4588ec20 | 1365 | else |
502b9b64 JB |
1366 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1367 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1368 | } |
1369 | ||
502b9b64 | 1370 | update_end (f); |
4588ec20 JB |
1371 | |
1372 | if (termscript) | |
1373 | fflush (termscript); | |
1374 | fflush (stdout); | |
1375 | ||
1376 | /* Here if output is preempted because input is detected. */ | |
1377 | do_pause: | |
1378 | ||
502b9b64 | 1379 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1380 | display_completed = !pause; |
1381 | ||
f5843453 | 1382 | bzero (FRAME_DESIRED_GLYPHS (f)->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1383 | return pause; |
1384 | } | |
1385 | ||
1386 | /* Called when about to quit, to check for doing so | |
1387 | at an improper time. */ | |
1388 | ||
1389 | void | |
1390 | quit_error_check () | |
1391 | { | |
502b9b64 | 1392 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1393 | return; |
502b9b64 | 1394 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1395 | abort (); |
502b9b64 | 1396 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1397 | abort (); |
1398 | } | |
1399 | \f | |
1400 | /* Decide what insert/delete line to do, and do it */ | |
1401 | ||
1402 | extern void scrolling_1 (); | |
1403 | ||
502b9b64 JB |
1404 | scrolling (frame) |
1405 | FRAME_PTR frame; | |
4588ec20 JB |
1406 | { |
1407 | int unchanged_at_top, unchanged_at_bottom; | |
1408 | int window_size; | |
1409 | int changed_lines; | |
502b9b64 JB |
1410 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1411 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1412 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
190bb91a | 1413 | int *old_draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
4588ec20 | 1414 | register int i; |
502b9b64 JB |
1415 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1416 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1417 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1418 | |
1419 | /* Compute hash codes of all the lines. | |
1420 | Also calculate number of changed lines, | |
1421 | number of unchanged lines at the beginning, | |
1422 | and number of unchanged lines at the end. */ | |
1423 | ||
1424 | changed_lines = 0; | |
1425 | unchanged_at_top = 0; | |
502b9b64 JB |
1426 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1427 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1428 | { |
1429 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1430 | if (!current_frame->enable[i]) |
4588ec20 | 1431 | return 0; |
502b9b64 JB |
1432 | old_hash[i] = line_hash_code (current_frame, i); |
1433 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1434 | new_hash[i] = old_hash[i]; |
1435 | else | |
502b9b64 | 1436 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1437 | |
1438 | if (old_hash[i] != new_hash[i]) | |
1439 | { | |
1440 | changed_lines++; | |
502b9b64 | 1441 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1442 | } |
1443 | else if (i == unchanged_at_top) | |
1444 | unchanged_at_top++; | |
502b9b64 | 1445 | draw_cost[i] = line_draw_cost (desired_frame, i); |
190bb91a | 1446 | old_draw_cost[i] = line_draw_cost (current_frame, i); |
4588ec20 JB |
1447 | } |
1448 | ||
1449 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
190bb91a | 1450 | if (!scroll_region_ok && changed_lines < baud_rate / 2400 |
502b9b64 | 1451 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1452 | return 1; |
1453 | ||
502b9b64 | 1454 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1455 | - unchanged_at_bottom); |
1456 | ||
1457 | if (scroll_region_ok) | |
1458 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1459 | else if (memory_below_frame) |
4588ec20 JB |
1460 | free_at_end_vpos = -1; |
1461 | ||
1462 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1463 | current frame and desired frame, don't bother with i/d calc. */ |
190bb91a | 1464 | if (!scroll_region_ok && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
1465 | && (window_size >= |
1466 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1467 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1468 | old_hash, new_hash, draw_cost))) |
1469 | return 0; | |
1470 | ||
502b9b64 | 1471 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 1472 | draw_cost + unchanged_at_top - 1, |
190bb91a | 1473 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
1474 | old_hash + unchanged_at_top - 1, |
1475 | new_hash + unchanged_at_top - 1, | |
1476 | free_at_end_vpos - unchanged_at_top); | |
1477 | ||
1478 | return 0; | |
1479 | } | |
1480 | \f | |
1481 | /* Return the offset in its buffer of the character at location col, line | |
1482 | in the given window. */ | |
1483 | int | |
1484 | buffer_posn_from_coords (window, col, line) | |
1485 | struct window *window; | |
1486 | int col, line; | |
1487 | { | |
ef0fdbb1 | 1488 | int hscroll = XINT (window->hscroll); |
4588ec20 JB |
1489 | int window_left = XFASTINT (window->left); |
1490 | ||
1491 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1492 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1493 | window. */ | |
fa61c701 | 1494 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1495 | |
efb859b4 | 1496 | int startp = marker_position (window->start); |
4588ec20 JB |
1497 | |
1498 | /* Since compute_motion will only operate on the current buffer, | |
1499 | we need to save the old one and restore it when we're done. */ | |
1500 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1501 | struct position *posn; |
4588ec20 JB |
1502 | |
1503 | current_buffer = XBUFFER (window->buffer); | |
1504 | ||
502b9b64 JB |
1505 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1506 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1507 | the window, but it isn't maintained correctly, and I'm not even |
1508 | sure I will keep it. */ | |
1509 | posn = compute_motion (startp, 0, | |
1510 | (window == XWINDOW (minibuf_window) && startp == 1 | |
ef0fdbb1 KH |
1511 | ? minibuf_prompt_width : 0) |
1512 | + (hscroll ? 1 - hscroll : 0), | |
fb0f454a | 1513 | ZV, line, col, |
e37f06d7 | 1514 | window_width, hscroll, 0, window); |
4588ec20 JB |
1515 | |
1516 | current_buffer = old_current_buffer; | |
1517 | ||
502b9b64 | 1518 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1519 | to be *after* the newline, i.e. at the start of the next line. |
1520 | This is reasonable, but not really what we want. So if the | |
1521 | result is on a line below LINE, back it up one character. */ | |
1522 | if (posn->vpos > line) | |
1523 | return posn->bufpos - 1; | |
1524 | else | |
1525 | return posn->bufpos; | |
4588ec20 JB |
1526 | } |
1527 | \f | |
1528 | static int | |
1529 | count_blanks (r) | |
1530 | register GLYPH *r; | |
1531 | { | |
1532 | register GLYPH *p = r; | |
94aa5d2d RS |
1533 | while (*p++ == SPACEGLYPH); |
1534 | return p - r - 1; | |
4588ec20 JB |
1535 | } |
1536 | ||
1537 | static int | |
1538 | count_match (str1, str2) | |
1539 | GLYPH *str1, *str2; | |
1540 | { | |
1541 | register GLYPH *p1 = str1; | |
1542 | register GLYPH *p2 = str2; | |
1543 | while (*p1++ == *p2++); | |
1544 | return p1 - str1 - 1; | |
1545 | } | |
1546 | ||
1547 | /* Char insertion/deletion cost vector, from term.c */ | |
1548 | extern int *char_ins_del_vector; | |
1549 | ||
945807a3 | 1550 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1551 | |
1552 | static void | |
502b9b64 JB |
1553 | update_line (frame, vpos) |
1554 | register FRAME_PTR frame; | |
4588ec20 JB |
1555 | int vpos; |
1556 | { | |
1557 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
60a8948a | 1558 | int *temp1; |
4588ec20 JB |
1559 | int tem; |
1560 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1561 | int save; | |
502b9b64 JB |
1562 | register struct frame_glyphs *current_frame |
1563 | = FRAME_CURRENT_GLYPHS (frame); | |
1564 | register struct frame_glyphs *desired_frame | |
1565 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1566 | |
502b9b64 JB |
1567 | if (desired_frame->highlight[vpos] |
1568 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1569 | { |
502b9b64 JB |
1570 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1571 | (current_frame->enable[vpos] ? | |
1572 | current_frame->used[vpos] : 0)); | |
1573 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1574 | } |
1575 | else | |
502b9b64 | 1576 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1577 | |
502b9b64 | 1578 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1579 | { |
1580 | olen = 0; | |
1581 | } | |
1582 | else | |
1583 | { | |
502b9b64 JB |
1584 | obody = current_frame->glyphs[vpos]; |
1585 | olen = current_frame->used[vpos]; | |
1586 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1587 | { |
1588 | if (!must_write_spaces) | |
1589 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1590 | olen--; | |
1591 | } | |
1592 | else | |
1593 | { | |
1594 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1595 | spaces all the way to the frame edge |
4588ec20 JB |
1596 | so that the reverse video extends all the way across. */ |
1597 | ||
502b9b64 | 1598 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1599 | obody[olen++] = SPACEGLYPH; |
1600 | } | |
1601 | } | |
1602 | ||
1603 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1604 | current_frame->enable[vpos] = 1; |
1605 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1606 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1607 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1608 | |
1609 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1610 | if (FRAME_X_P (frame)) |
4588ec20 | 1611 | { |
502b9b64 JB |
1612 | current_frame->pix_width[vpos] |
1613 | = current_frame->used[vpos] | |
1614 | * FONT_WIDTH (frame->display.x->font); | |
1615 | current_frame->pix_height[vpos] | |
39d1fe00 | 1616 | = frame->display.x->line_height; |
4588ec20 JB |
1617 | } |
1618 | #endif /* HAVE_X_WINDOWS */ | |
1619 | ||
502b9b64 | 1620 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1621 | { |
1622 | nlen = 0; | |
1623 | goto just_erase; | |
1624 | } | |
1625 | ||
502b9b64 JB |
1626 | nbody = desired_frame->glyphs[vpos]; |
1627 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1628 | |
1629 | /* Pretend trailing spaces are not there at all, | |
1630 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1631 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1632 | { |
1633 | if (!must_write_spaces) | |
1634 | /* We know that the previous character byte contains 0. */ | |
1635 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1636 | nlen--; | |
1637 | } | |
1638 | else | |
1639 | { | |
1640 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1641 | all the way to the frame edge |
4588ec20 JB |
1642 | so that the reverse video extends all the way across. */ |
1643 | ||
502b9b64 | 1644 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1645 | nbody[nlen++] = SPACEGLYPH; |
1646 | } | |
1647 | ||
1648 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1649 | if (!char_ins_del_ok) | |
1650 | { | |
1651 | int i,j; | |
1652 | ||
76426794 RS |
1653 | #if 0 |
1654 | if (FRAME_X_P (frame)) | |
1655 | { | |
1656 | /* Under X, erase everything we are going to rewrite, | |
1657 | and rewrite everything from the first char that's changed. | |
1658 | This is part of supporting fonts like Courier | |
1659 | whose chars can overlap outside the char width. */ | |
1660 | for (i = 0; i < nlen; i++) | |
1661 | if (i >= olen || nbody[i] != obody[i]) | |
1662 | break; | |
1663 | ||
1664 | cursor_to (vpos, i); | |
1665 | if (i != olen) | |
1666 | clear_end_of_line (olen); | |
1667 | write_glyphs (nbody + i, nlen - i); | |
1668 | } | |
1669 | else | |
1670 | {} | |
1671 | #endif /* 0 */ | |
4588ec20 JB |
1672 | for (i = 0; i < nlen; i++) |
1673 | { | |
1674 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1675 | { | |
1676 | cursor_to (vpos, i); | |
1677 | for (j = 1; (i + j < nlen && | |
1678 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1679 | j++); | |
1680 | ||
1681 | /* Output this run of non-matching chars. */ | |
1682 | write_glyphs (nbody + i, j); | |
1683 | i += j - 1; | |
1684 | ||
1685 | /* Now find the next non-match. */ | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1690 | if (olen > nlen) | |
1691 | { | |
1692 | cursor_to (vpos, nlen); | |
1693 | clear_end_of_line (olen); | |
1694 | } | |
1695 | ||
502b9b64 JB |
1696 | /* Exchange contents between current_frame and new_frame. */ |
1697 | temp = desired_frame->glyphs[vpos]; | |
1698 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1699 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1700 | |
60a8948a RS |
1701 | /* Exchange charstarts between current_frame and new_frame. */ |
1702 | temp1 = desired_frame->charstarts[vpos]; | |
1703 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1704 | current_frame->charstarts[vpos] = temp1; | |
1705 | ||
4588ec20 JB |
1706 | return; |
1707 | } | |
1708 | ||
1709 | if (!olen) | |
1710 | { | |
502b9b64 | 1711 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1712 | ? 0 : count_blanks (nbody); |
1713 | if (nlen > nsp) | |
1714 | { | |
1715 | cursor_to (vpos, nsp); | |
1716 | write_glyphs (nbody + nsp, nlen - nsp); | |
1717 | } | |
1718 | ||
502b9b64 JB |
1719 | /* Exchange contents between current_frame and new_frame. */ |
1720 | temp = desired_frame->glyphs[vpos]; | |
1721 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1722 | current_frame->glyphs[vpos] = temp; | |
4588ec20 | 1723 | |
60a8948a RS |
1724 | /* Exchange charstarts between current_frame and new_frame. */ |
1725 | temp1 = desired_frame->charstarts[vpos]; | |
1726 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1727 | current_frame->charstarts[vpos] = temp1; | |
1728 | ||
4588ec20 JB |
1729 | return; |
1730 | } | |
1731 | ||
1732 | obody[olen] = 1; | |
1733 | save = nbody[nlen]; | |
1734 | nbody[nlen] = 0; | |
1735 | ||
1736 | /* Compute number of leading blanks in old and new contents. */ | |
1737 | osp = count_blanks (obody); | |
502b9b64 | 1738 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1739 | nsp = count_blanks (nbody); |
1740 | else | |
1741 | nsp = 0; | |
1742 | ||
1743 | /* Compute number of matching chars starting with first nonblank. */ | |
1744 | begmatch = count_match (obody + osp, nbody + nsp); | |
1745 | ||
1746 | /* Spaces in new match implicit space past the end of old. */ | |
1747 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1748 | if (!must_write_spaces && osp + begmatch == olen) | |
1749 | { | |
1750 | np1 = nbody + nsp; | |
1751 | while (np1[begmatch] == SPACEGLYPH) | |
1752 | begmatch++; | |
1753 | } | |
1754 | ||
1755 | /* Avoid doing insert/delete char | |
1756 | just cause number of leading spaces differs | |
1757 | when the following text does not match. */ | |
1758 | if (begmatch == 0 && osp != nsp) | |
1759 | osp = nsp = min (osp, nsp); | |
1760 | ||
1761 | /* Find matching characters at end of line */ | |
1762 | op1 = obody + olen; | |
1763 | np1 = nbody + nlen; | |
1764 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1765 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1766 | { | |
1767 | op1--; | |
1768 | np1--; | |
1769 | } | |
1770 | endmatch = obody + olen - op1; | |
1771 | ||
1772 | /* Put correct value back in nbody[nlen]. | |
1773 | This is important because direct_output_for_insert | |
1774 | can write into the line at a later point. | |
1775 | If this screws up the zero at the end of the line, re-establish it. */ | |
1776 | nbody[nlen] = save; | |
1777 | obody[olen] = 0; | |
1778 | ||
1779 | /* tem gets the distance to insert or delete. | |
1780 | endmatch is how many characters we save by doing so. | |
1781 | Is it worth it? */ | |
1782 | ||
1783 | tem = (nlen - nsp) - (olen - osp); | |
1784 | if (endmatch && tem | |
502b9b64 | 1785 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1786 | endmatch = 0; |
1787 | ||
1788 | /* nsp - osp is the distance to insert or delete. | |
1789 | If that is nonzero, begmatch is known to be nonzero also. | |
1790 | begmatch + endmatch is how much we save by doing the ins/del. | |
1791 | Is it worth it? */ | |
1792 | ||
1793 | if (nsp != osp | |
1794 | && (!char_ins_del_ok | |
502b9b64 | 1795 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1796 | { |
1797 | begmatch = 0; | |
1798 | endmatch = 0; | |
1799 | osp = nsp = min (osp, nsp); | |
1800 | } | |
1801 | ||
1802 | /* Now go through the line, inserting, writing and | |
1803 | deleting as appropriate. */ | |
1804 | ||
1805 | if (osp > nsp) | |
1806 | { | |
1807 | cursor_to (vpos, nsp); | |
1808 | delete_glyphs (osp - nsp); | |
1809 | } | |
1810 | else if (nsp > osp) | |
1811 | { | |
1812 | /* If going to delete chars later in line | |
1813 | and insert earlier in the line, | |
1814 | must delete first to avoid losing data in the insert */ | |
1815 | if (endmatch && nlen < olen + nsp - osp) | |
1816 | { | |
1817 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1818 | delete_glyphs (olen + nsp - osp - nlen); | |
1819 | olen = nlen - (nsp - osp); | |
1820 | } | |
1821 | cursor_to (vpos, osp); | |
1822 | insert_glyphs ((char *)0, nsp - osp); | |
1823 | } | |
1824 | olen += nsp - osp; | |
1825 | ||
1826 | tem = nsp + begmatch + endmatch; | |
1827 | if (nlen != tem || olen != tem) | |
1828 | { | |
1829 | cursor_to (vpos, nsp + begmatch); | |
1830 | if (!endmatch || nlen == olen) | |
1831 | { | |
1832 | /* If new text being written reaches right margin, | |
1833 | there is no need to do clear-to-eol at the end. | |
1834 | (and it would not be safe, since cursor is not | |
1835 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1836 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1837 | olen = 0; |
1838 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1839 | ||
1840 | #ifdef obsolete | |
1841 | ||
1842 | /* the following code loses disastrously if tem == nlen. | |
1843 | Rather than trying to fix that case, I am trying the simpler | |
1844 | solution found above. */ | |
1845 | ||
1846 | /* If the text reaches to the right margin, | |
1847 | it will lose one way or another (depending on AutoWrap) | |
1848 | to clear to end of line after outputting all the text. | |
1849 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1850 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1851 | { |
1852 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1853 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1854 | clear_end_of_line (olen); | |
1855 | olen = 0; /* Don't let it be cleared again later */ | |
1856 | write_glyphs (nbody + nlen - 1, 1); | |
1857 | } | |
1858 | else | |
1859 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1860 | #endif /* OBSOLETE */ | |
1861 | ||
1862 | } | |
1863 | else if (nlen > olen) | |
1864 | { | |
1865 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1866 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1867 | olen = nlen; | |
1868 | } | |
1869 | else if (olen > nlen) | |
1870 | { | |
1871 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1872 | delete_glyphs (olen - nlen); | |
1873 | olen = nlen; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | just_erase: | |
1878 | /* If any unerased characters remain after the new line, erase them. */ | |
1879 | if (olen > nlen) | |
1880 | { | |
1881 | cursor_to (vpos, nlen); | |
1882 | clear_end_of_line (olen); | |
1883 | } | |
1884 | ||
502b9b64 JB |
1885 | /* Exchange contents between current_frame and new_frame. */ |
1886 | temp = desired_frame->glyphs[vpos]; | |
1887 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1888 | current_frame->glyphs[vpos] = temp; | |
60a8948a RS |
1889 | |
1890 | /* Exchange charstarts between current_frame and new_frame. */ | |
1891 | temp1 = desired_frame->charstarts[vpos]; | |
1892 | desired_frame->charstarts[vpos] = current_frame->charstarts[vpos]; | |
1893 | current_frame->charstarts[vpos] = temp1; | |
4588ec20 JB |
1894 | } |
1895 | \f | |
267ad509 | 1896 | /* A vector of size >= NFRAMES + 3 * NBUFFERS + 1, containing the session's |
078b3696 KH |
1897 | frames, buffers, buffer-read-only flags, and buffer-modified-flags, |
1898 | and a trailing sentinel (so we don't need to add length checks). */ | |
1899 | static Lisp_Object frame_and_buffer_state; | |
1900 | ||
1901 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
1902 | Sframe_or_buffer_changed_p, 0, 0, 0, | |
1903 | "Return non-nil if the frame and buffer state appears to have changed.\n\ | |
1904 | The state variable is an internal vector containing all frames and buffers,\n\ | |
836d2cde | 1905 | aside from buffers whose names start with space,\n\ |
078b3696 KH |
1906 | along with the buffers' read-only and modified flags, which allows a fast\n\ |
1907 | check to see whether the menu bars might need to be recomputed.\n\ | |
1908 | If this function returns non-nil, it updates the internal vector to reflect\n\ | |
1909 | the current state.\n") | |
1910 | () | |
1911 | { | |
1912 | Lisp_Object tail, frame, buf; | |
1913 | Lisp_Object *vecp; | |
1914 | int n; | |
1915 | vecp = XVECTOR (frame_and_buffer_state)->contents; | |
1916 | FOR_EACH_FRAME (tail, frame) | |
1917 | if (!EQ (*vecp++, frame)) | |
1918 | goto changed; | |
50cf83f8 RS |
1919 | /* Check that the buffer info matches. |
1920 | No need to test for the end of the vector | |
1921 | because the last element of the vector is lambda | |
1922 | and that will always cause a mismatch. */ | |
078b3696 KH |
1923 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
1924 | { | |
1925 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1926 | /* Ignore buffers that aren't included in buffer lists. */ |
1927 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1928 | continue; | |
078b3696 KH |
1929 | if (!EQ (*vecp++, buf)) |
1930 | goto changed; | |
1931 | if (!EQ (*vecp++, XBUFFER (buf)->read_only)) | |
1932 | goto changed; | |
1933 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) | |
1934 | goto changed; | |
1935 | } | |
50cf83f8 RS |
1936 | /* Detect deletion of a buffer at the end of the list. */ |
1937 | if (*vecp == Qlambda) | |
1938 | return Qnil; | |
078b3696 | 1939 | changed: |
5dad8282 | 1940 | /* Start with 1 so there is room for at least one lambda at the end. */ |
078b3696 KH |
1941 | n = 1; |
1942 | FOR_EACH_FRAME (tail, frame) | |
1943 | n++; | |
1944 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1945 | n += 3; | |
267ad509 KH |
1946 | /* Reallocate the vector if it's grown, or if it's shrunk a lot. */ |
1947 | if (n > XVECTOR (frame_and_buffer_state)->size | |
1948 | || n < XVECTOR (frame_and_buffer_state)->size / 2) | |
1949 | frame_and_buffer_state = Fmake_vector (make_number (n), Qlambda); | |
078b3696 KH |
1950 | vecp = XVECTOR (frame_and_buffer_state)->contents; |
1951 | FOR_EACH_FRAME (tail, frame) | |
1952 | *vecp++ = frame; | |
1953 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1954 | { | |
1955 | buf = XCONS (XCONS (tail)->car)->cdr; | |
836d2cde RS |
1956 | /* Ignore buffers that aren't included in buffer lists. */ |
1957 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1958 | continue; | |
078b3696 KH |
1959 | *vecp++ = buf; |
1960 | *vecp++ = XBUFFER (buf)->read_only; | |
1961 | *vecp++ = Fbuffer_modified_p (buf); | |
1962 | } | |
267ad509 KH |
1963 | /* If we left any slack in the vector, fill it up now. */ |
1964 | for (; n < XVECTOR (frame_and_buffer_state)->size; ++n) | |
1965 | *vecp++ = Qlambda; | |
078b3696 KH |
1966 | return Qt; |
1967 | } | |
1968 | \f | |
4588ec20 JB |
1969 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, |
1970 | 1, 1, "FOpen termscript file: ", | |
1971 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1972 | FILE = nil means just close any termscript file currently open.") | |
1973 | (file) | |
1974 | Lisp_Object file; | |
1975 | { | |
1976 | if (termscript != 0) fclose (termscript); | |
1977 | termscript = 0; | |
1978 | ||
efb859b4 | 1979 | if (! NILP (file)) |
4588ec20 JB |
1980 | { |
1981 | file = Fexpand_file_name (file, Qnil); | |
1982 | termscript = fopen (XSTRING (file)->data, "w"); | |
1983 | if (termscript == 0) | |
1984 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1985 | } | |
1986 | return Qnil; | |
1987 | } | |
1988 | \f | |
1989 | ||
1990 | #ifdef SIGWINCH | |
efb859b4 | 1991 | SIGTYPE |
61cbef47 RS |
1992 | window_change_signal (signalnum) /* If we don't have an argument, */ |
1993 | int signalnum; /* some compilers complain in signal calls. */ | |
4588ec20 JB |
1994 | { |
1995 | int width, height; | |
1996 | extern int errno; | |
1997 | int old_errno = errno; | |
1998 | ||
502b9b64 | 1999 | get_frame_size (&width, &height); |
4588ec20 | 2000 | |
502b9b64 JB |
2001 | /* The frame size change obviously applies to a termcap-controlled |
2002 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 2003 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 2004 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
2005 | but don't reallocate the data structures now. Let that be done |
2006 | later outside of the signal handler. */ | |
2007 | ||
2008 | { | |
35f56f96 | 2009 | Lisp_Object tail, frame; |
4588ec20 | 2010 | |
35f56f96 | 2011 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2012 | { |
35f56f96 | 2013 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 2014 | { |
35f56f96 | 2015 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
2016 | break; |
2017 | } | |
2018 | } | |
2019 | } | |
2020 | ||
2021 | signal (SIGWINCH, window_change_signal); | |
2022 | errno = old_errno; | |
2023 | } | |
2024 | #endif /* SIGWINCH */ | |
2025 | ||
2026 | ||
502b9b64 | 2027 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
2028 | |
2029 | do_pending_window_change () | |
2030 | { | |
2031 | /* If window_change_signal should have run before, run it now. */ | |
2032 | while (delayed_size_change) | |
2033 | { | |
35f56f96 | 2034 | Lisp_Object tail, frame; |
4588ec20 JB |
2035 | |
2036 | delayed_size_change = 0; | |
2037 | ||
35f56f96 | 2038 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 2039 | { |
35f56f96 JB |
2040 | FRAME_PTR f = XFRAME (frame); |
2041 | ||
502b9b64 JB |
2042 | int height = FRAME_NEW_HEIGHT (f); |
2043 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 2044 | |
08f7aa3e | 2045 | if (height != 0 || width != 0) |
b6a65ac2 | 2046 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
2047 | } |
2048 | } | |
2049 | } | |
2050 | ||
2051 | ||
502b9b64 | 2052 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 2053 | indicate no change is to take place. |
4588ec20 | 2054 | |
b6a65ac2 JB |
2055 | If DELAY is non-zero, then assume we're being called from a signal |
2056 | handler, and queue the change for later - perhaps the next | |
2057 | redisplay. Since this tries to resize windows, we can't call it | |
2058 | from a signal handler. */ | |
2059 | ||
45140e01 RS |
2060 | change_frame_size (f, newheight, newwidth, pretend, delay) |
2061 | register FRAME_PTR f; | |
2062 | int newheight, newwidth, pretend; | |
2063 | { | |
2064 | Lisp_Object tail, frame; | |
2065 | if (FRAME_TERMCAP_P (f)) | |
2066 | { | |
2067 | /* When using termcap, all frames use the same screen, | |
2068 | so a change in size affects all termcap frames. */ | |
2069 | FOR_EACH_FRAME (tail, frame) | |
2070 | if (FRAME_TERMCAP_P (XFRAME (frame))) | |
2071 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, | |
2072 | pretend, delay); | |
2073 | } | |
2074 | else | |
2075 | change_frame_size_1 (f, newheight, newwidth, pretend, delay); | |
2076 | } | |
2077 | ||
2078 | static void | |
2079 | change_frame_size_1 (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 2080 | register FRAME_PTR frame; |
b6a65ac2 | 2081 | int newheight, newwidth, pretend; |
4588ec20 JB |
2082 | { |
2083 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 2084 | if (delay) |
4588ec20 | 2085 | { |
b6a65ac2 | 2086 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 2087 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
2088 | delayed_size_change = 1; |
2089 | return; | |
2090 | } | |
2091 | ||
502b9b64 JB |
2092 | /* This size-change overrides any pending one for this frame. */ |
2093 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
2094 | FRAME_NEW_WIDTH (frame) = 0; |
2095 | ||
08f7aa3e | 2096 | /* If an argument is zero, set it to the current value. */ |
b6a65ac2 JB |
2097 | newheight || (newheight = FRAME_HEIGHT (frame)); |
2098 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 2099 | |
b6a65ac2 JB |
2100 | /* Round up to the smallest acceptable size. */ |
2101 | check_frame_size (frame, &newheight, &newwidth); | |
2102 | ||
2103 | /* If we're not changing the frame size, quit now. */ | |
2104 | if (newheight == FRAME_HEIGHT (frame) | |
2105 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
2106 | return; |
2107 | ||
b6a65ac2 | 2108 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 2109 | { |
b6a65ac2 | 2110 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 2111 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 2112 | { |
502b9b64 JB |
2113 | /* Frame has both root and minibuffer. */ |
2114 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 2115 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
a5d8b611 KH |
2116 | XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top, |
2117 | newheight - 1); | |
502b9b64 | 2118 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
2119 | } |
2120 | else | |
502b9b64 | 2121 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
2122 | set_window_height (FRAME_ROOT_WINDOW (frame), |
2123 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
2124 | |
2125 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
2126 | FrameRows = newheight; | |
4588ec20 JB |
2127 | |
2128 | #if 0 | |
502b9b64 | 2129 | if (frame->output_method == output_termcap) |
4588ec20 | 2130 | { |
b6a65ac2 | 2131 | frame_height = newheight; |
4588ec20 | 2132 | if (!pretend) |
b6a65ac2 | 2133 | FrameRows = newheight; |
4588ec20 JB |
2134 | } |
2135 | #endif | |
2136 | } | |
2137 | ||
b6a65ac2 | 2138 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 2139 | { |
502b9b64 | 2140 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 2141 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 2142 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 2143 | |
b6a65ac2 | 2144 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 2145 | FrameCols = newwidth; |
4588ec20 | 2146 | #if 0 |
502b9b64 | 2147 | if (frame->output_method == output_termcap) |
4588ec20 | 2148 | { |
502b9b64 | 2149 | frame_width = newwidth; |
4588ec20 | 2150 | if (!pretend) |
502b9b64 | 2151 | FrameCols = newwidth; |
4588ec20 JB |
2152 | } |
2153 | #endif | |
2154 | } | |
2155 | ||
b6a65ac2 JB |
2156 | FRAME_HEIGHT (frame) = newheight; |
2157 | FRAME_WIDTH (frame) = newwidth; | |
986e61b8 RS |
2158 | |
2159 | if (FRAME_CURSOR_X (frame) >= FRAME_WIDTH (frame)) | |
2160 | FRAME_CURSOR_X (frame) = FRAME_WIDTH (frame) - 1; | |
2161 | if (FRAME_CURSOR_Y (frame) >= FRAME_HEIGHT (frame)) | |
2162 | FRAME_CURSOR_Y (frame) = FRAME_HEIGHT (frame) - 1; | |
2163 | ||
502b9b64 JB |
2164 | remake_frame_glyphs (frame); |
2165 | calculate_costs (frame); | |
4588ec20 JB |
2166 | } |
2167 | \f | |
2168 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
2169 | Ssend_string_to_terminal, 1, 1, 0, | |
2170 | "Send STRING to the terminal without alteration.\n\ | |
2171 | Control characters in STRING will have terminal-dependent effects.") | |
2172 | (str) | |
2173 | Lisp_Object str; | |
2174 | { | |
2175 | CHECK_STRING (str, 0); | |
2176 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
2177 | fflush (stdout); | |
2178 | if (termscript) | |
2179 | { | |
2180 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
2181 | fflush (termscript); | |
2182 | } | |
2183 | return Qnil; | |
2184 | } | |
2185 | ||
2186 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
2187 | "Beep, or flash the screen.\n\ | |
2188 | Also, unless an argument is given,\n\ | |
2189 | terminate any keyboard macro currently executing.") | |
2190 | (arg) | |
2191 | Lisp_Object arg; | |
2192 | { | |
efb859b4 | 2193 | if (!NILP (arg)) |
4588ec20 | 2194 | { |
7fa788da RS |
2195 | if (noninteractive) |
2196 | putchar (07); | |
2197 | else | |
2198 | ring_bell (); | |
4588ec20 JB |
2199 | fflush (stdout); |
2200 | } | |
2201 | else | |
2202 | bitch_at_user (); | |
2203 | ||
2204 | return Qnil; | |
2205 | } | |
2206 | ||
2207 | bitch_at_user () | |
2208 | { | |
2209 | if (noninteractive) | |
2210 | putchar (07); | |
2211 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
2212 | error ("Keyboard macro terminated by a command ringing the bell"); | |
2213 | else | |
2214 | ring_bell (); | |
2215 | fflush (stdout); | |
2216 | } | |
2217 | ||
2218 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 2219 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
2220 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2221 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2222 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2223 | Emacs was built without floating point support.\n\ | |
2224 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
2225 | (seconds, milliseconds) |
2226 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 2227 | { |
767229f8 | 2228 | int sec, usec; |
4588ec20 | 2229 | |
767229f8 | 2230 | if (NILP (milliseconds)) |
e9c9a718 | 2231 | XSETINT (milliseconds, 0); |
767229f8 JB |
2232 | else |
2233 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2234 | usec = XINT (milliseconds) * 1000; |
2235 | ||
2236 | #ifdef LISP_FLOAT_TYPE | |
2237 | { | |
2238 | double duration = extract_float (seconds); | |
2239 | sec = (int) duration; | |
2240 | usec += (duration - sec) * 1000000; | |
2241 | } | |
2242 | #else | |
2243 | CHECK_NUMBER (seconds, 0); | |
2244 | sec = XINT (seconds); | |
2245 | #endif | |
4588ec20 | 2246 | |
a41f8bed | 2247 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2248 | if (sec == 0 && usec != 0) |
2249 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 2250 | #endif |
767229f8 JB |
2251 | |
2252 | /* Assure that 0 <= usec < 1000000. */ | |
2253 | if (usec < 0) | |
2254 | { | |
2255 | /* We can't rely on the rounding being correct if user is negative. */ | |
2256 | if (-1000000 < usec) | |
2257 | sec--, usec += 1000000; | |
2258 | else | |
2259 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 2260 | } |
767229f8 JB |
2261 | else |
2262 | sec += usec / 1000000, usec %= 1000000; | |
2263 | ||
5c48f0da | 2264 | if (sec <= 0) |
767229f8 | 2265 | return Qnil; |
4588ec20 | 2266 | |
f76475ad JB |
2267 | { |
2268 | Lisp_Object zero; | |
2269 | ||
a5d8b611 | 2270 | XSETFASTINT (zero, 0); |
f76475ad JB |
2271 | wait_reading_process_input (sec, usec, zero, 0); |
2272 | } | |
d1af74e9 | 2273 | |
767229f8 JB |
2274 | /* We should always have wait_reading_process_input; we have a dummy |
2275 | implementation for systems which don't support subprocesses. */ | |
2276 | #if 0 | |
2277 | /* No wait_reading_process_input */ | |
4588ec20 JB |
2278 | immediate_quit = 1; |
2279 | QUIT; | |
2280 | ||
2281 | #ifdef VMS | |
2282 | sys_sleep (sec); | |
2283 | #else /* not VMS */ | |
2284 | /* The reason this is done this way | |
2285 | (rather than defined (H_S) && defined (H_T)) | |
2286 | is because the VMS preprocessor doesn't grok `defined' */ | |
2287 | #ifdef HAVE_SELECT | |
a41f8bed JB |
2288 | EMACS_GET_TIME (end_time); |
2289 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 2290 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 2291 | |
4588ec20 JB |
2292 | while (1) |
2293 | { | |
a41f8bed JB |
2294 | EMACS_GET_TIME (timeout); |
2295 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2296 | if (EMACS_TIME_NEG_P (timeout) | |
2297 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
2298 | break; |
2299 | } | |
4588ec20 JB |
2300 | #else /* not HAVE_SELECT */ |
2301 | sleep (sec); | |
2302 | #endif /* HAVE_SELECT */ | |
2303 | #endif /* not VMS */ | |
2304 | ||
2305 | immediate_quit = 0; | |
2306 | #endif /* no subprocesses */ | |
2307 | ||
2308 | return Qnil; | |
2309 | } | |
2310 | ||
f76475ad JB |
2311 | /* This is just like wait_reading_process_input, except that |
2312 | it does the redisplay. | |
2313 | ||
ea0d86af | 2314 | It's also much like Fsit_for, except that it can be used for |
836d2cde | 2315 | waiting for input as well. */ |
4588ec20 | 2316 | |
f76475ad JB |
2317 | Lisp_Object |
2318 | sit_for (sec, usec, reading, display) | |
2319 | int sec, usec, reading, display; | |
2320 | { | |
2321 | Lisp_Object read_kbd; | |
4588ec20 JB |
2322 | |
2323 | if (detect_input_pending ()) | |
2324 | return Qnil; | |
4588ec20 | 2325 | |
f76475ad JB |
2326 | if (display) |
2327 | redisplay_preserve_echo_area (); | |
4588ec20 | 2328 | |
dfdb645c JB |
2329 | if (sec == 0 && usec == 0) |
2330 | return Qt; | |
2331 | ||
4588ec20 | 2332 | #ifdef SIGIO |
8fc798e9 | 2333 | gobble_input (0); |
f76475ad JB |
2334 | #endif |
2335 | ||
e9c9a718 | 2336 | XSETINT (read_kbd, reading ? -1 : 1); |
f76475ad JB |
2337 | wait_reading_process_input (sec, usec, read_kbd, display); |
2338 | ||
d1af74e9 | 2339 | |
500ab754 JB |
2340 | /* wait_reading_process_input should always be available now; it is |
2341 | simulated in a simple way on systems that don't support | |
2342 | subprocesses. */ | |
2343 | #if 0 | |
2344 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
2345 | immediate_quit = 1; |
2346 | QUIT; | |
2347 | ||
2348 | waitchannels = 1; | |
2349 | #ifdef VMS | |
f76475ad | 2350 | input_wait_timeout (XINT (arg)); |
4588ec20 | 2351 | #else /* not VMS */ |
d1af74e9 JB |
2352 | #ifndef HAVE_TIMEVAL |
2353 | timeout_sec = sec; | |
2354 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
2355 | #else /* HAVE_TIMEVAL */ | |
2356 | timeout.tv_sec = sec; | |
2357 | timeout.tv_usec = usec; | |
4588ec20 | 2358 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 2359 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
2360 | #endif /* not VMS */ |
2361 | ||
2362 | immediate_quit = 0; | |
d1af74e9 | 2363 | #endif |
4588ec20 JB |
2364 | |
2365 | return detect_input_pending () ? Qnil : Qt; | |
2366 | } | |
2367 | ||
f76475ad | 2368 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 2369 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
2370 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
2371 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
2372 | additional wait period, in milliseconds; this may be useful if your\n\ | |
2373 | Emacs was built without floating point support.\n\ | |
2374 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
f76475ad JB |
2375 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
2376 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
2377 | if input is available before it starts.\n\ | |
2378 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
2379 | (seconds, milliseconds, nodisp) |
2380 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 2381 | { |
767229f8 | 2382 | int sec, usec; |
f76475ad | 2383 | |
767229f8 | 2384 | if (NILP (milliseconds)) |
e9c9a718 | 2385 | XSETINT (milliseconds, 0); |
767229f8 JB |
2386 | else |
2387 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
2388 | usec = XINT (milliseconds) * 1000; |
2389 | ||
2390 | #ifdef LISP_FLOAT_TYPE | |
2391 | { | |
2392 | double duration = extract_float (seconds); | |
2393 | sec = (int) duration; | |
2394 | usec += (duration - sec) * 1000000; | |
2395 | } | |
2396 | #else | |
2397 | CHECK_NUMBER (seconds, 0); | |
2398 | sec = XINT (seconds); | |
2399 | #endif | |
f76475ad | 2400 | |
f76475ad | 2401 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
2402 | if (usec != 0 && sec == 0) |
2403 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 2404 | #endif |
f76475ad | 2405 | |
ea0d86af RS |
2406 | if (NILP (nodisp)) |
2407 | prepare_menu_bars (); | |
f76475ad JB |
2408 | return sit_for (sec, usec, 0, NILP (nodisp)); |
2409 | } | |
4588ec20 JB |
2410 | \f |
2411 | char *terminal_type; | |
2412 | ||
2413 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2414 | /* Determine terminal type and set terminal_driver */ | |
2415 | /* Then invoke its decoding routine to set up variables | |
2416 | in the terminal package */ | |
2417 | ||
2418 | init_display () | |
2419 | { | |
2420 | #ifdef HAVE_X_WINDOWS | |
2421 | extern int display_arg; | |
2422 | #endif | |
2423 | ||
2424 | meta_key = 0; | |
2425 | inverse_video = 0; | |
2426 | cursor_in_echo_area = 0; | |
2427 | terminal_type = (char *) 0; | |
2428 | ||
1315c181 JB |
2429 | /* Now is the time to initialize this; it's used by init_sys_modes |
2430 | during startup. */ | |
2431 | Vwindow_system = Qnil; | |
4588ec20 | 2432 | |
1315c181 JB |
2433 | /* If the user wants to use a window system, we shouldn't bother |
2434 | initializing the terminal. This is especially important when the | |
2435 | terminal is so dumb that emacs gives up before and doesn't bother | |
2436 | using the window system. | |
4588ec20 | 2437 | |
1315c181 JB |
2438 | If the DISPLAY environment variable is set, try to use X, and die |
2439 | with an error message if that doesn't work. */ | |
4588ec20 JB |
2440 | |
2441 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2442 | if (! display_arg) |
2443 | { | |
2444 | #ifdef VMS | |
5de9f849 | 2445 | display_arg = (getenv ("DECW$DISPLAY") != 0); |
d460af17 | 2446 | #else |
5de9f849 | 2447 | display_arg = (getenv ("DISPLAY") != 0); |
d460af17 | 2448 | #endif |
f040093a | 2449 | } |
d460af17 JB |
2450 | |
2451 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2452 | { |
2453 | Vwindow_system = intern ("x"); | |
2454 | #ifdef HAVE_X11 | |
2455 | Vwindow_system_version = make_number (11); | |
2456 | #else | |
2457 | Vwindow_system_version = make_number (10); | |
2458 | #endif | |
2459 | return; | |
2460 | } | |
2461 | #endif /* HAVE_X_WINDOWS */ | |
2462 | ||
2463 | /* If no window system has been specified, try to use the terminal. */ | |
2464 | if (! isatty (0)) | |
2465 | { | |
2466 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2467 | exit (1); | |
2468 | } | |
2469 | ||
2470 | /* Look at the TERM variable */ | |
2471 | terminal_type = (char *) getenv ("TERM"); | |
2472 | if (!terminal_type) | |
2473 | { | |
2474 | #ifdef VMS | |
2475 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2476 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2477 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2478 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2479 | #else | |
2480 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2481 | #endif | |
2482 | exit (1); | |
2483 | } | |
2484 | ||
2485 | #ifdef VMS | |
2486 | /* VMS DCL tends to upcase things, so downcase term type. | |
2487 | Hardly any uppercase letters in terminal types; should be none. */ | |
2488 | { | |
2489 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2490 | char *p; | |
2491 | ||
2492 | strcpy (new, terminal_type); | |
2493 | ||
2494 | for (p = new; *p; p++) | |
2495 | if (isupper (*p)) | |
2496 | *p = tolower (*p); | |
2497 | ||
2498 | terminal_type = new; | |
2499 | } | |
2500 | #endif | |
2501 | ||
2502 | term_init (terminal_type); | |
2503 | ||
502b9b64 JB |
2504 | remake_frame_glyphs (selected_frame); |
2505 | calculate_costs (selected_frame); | |
4588ec20 JB |
2506 | |
2507 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2508 | FRAME_CURSOR_X (selected_frame) = 0; |
2509 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2510 | |
2511 | #ifdef SIGWINCH | |
2512 | #ifndef CANNOT_DUMP | |
2513 | if (initialized) | |
2514 | #endif /* CANNOT_DUMP */ | |
2515 | signal (SIGWINCH, window_change_signal); | |
2516 | #endif /* SIGWINCH */ | |
2517 | } | |
2518 | \f | |
2519 | syms_of_display () | |
2520 | { | |
502b9b64 JB |
2521 | #ifdef MULTI_FRAME |
2522 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2523 | #endif |
2524 | defsubr (&Sredraw_display); | |
078b3696 | 2525 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
2526 | defsubr (&Sopen_termscript); |
2527 | defsubr (&Sding); | |
2528 | defsubr (&Ssit_for); | |
2529 | defsubr (&Ssleep_for); | |
2530 | defsubr (&Ssend_string_to_terminal); | |
2531 | ||
078b3696 KH |
2532 | frame_and_buffer_state = Fmake_vector (make_number (1), Qlambda); |
2533 | staticpro (&frame_and_buffer_state); | |
2534 | ||
4588ec20 | 2535 | DEFVAR_INT ("baud-rate", &baud_rate, |
eb285955 | 2536 | "*The output baud rate of the terminal.\n\ |
4588ec20 JB |
2537 | On most systems, changing this value will affect the amount of padding\n\ |
2538 | and the other strategic decisions made during redisplay."); | |
2539 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2540 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2541 | This means everything is in inverse video which otherwise would not be."); |
2542 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2543 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2544 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2545 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2546 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2547 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2548 | It is up to you to set this variable if your terminal can do that."); |
2549 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2550 | "A symbol naming the window-system under which Emacs is running\n\ | |
2551 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2552 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2553 | "The version number of the window system in use.\n\ | |
2554 | For X windows, this is 10 or 11."); | |
2555 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2556 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2557 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2558 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2559 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2560 | Each element can be:\n\ | |
2561 | integer: a glyph code which this glyph is an alias for.\n\ | |
2562 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2563 | nil: this glyph mod 256 is char code to output,\n\ | |
6666f05a | 2564 | and this glyph / 256 is face code for X windows (see `face-id')."); |
4588ec20 JB |
2565 | Vglyph_table = Qnil; |
2566 | ||
2567 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2568 | "Display table to use for buffers that specify none.\n\ | |
2569 | See `buffer-display-table' for more information."); | |
2570 | Vstandard_display_table = Qnil; | |
2571 | ||
2572 | /* Initialize `window-system', unless init_display already decided it. */ | |
2573 | #ifdef CANNOT_DUMP | |
2574 | if (noninteractive) | |
2575 | #endif | |
2576 | { | |
2577 | Vwindow_system = Qnil; | |
2578 | Vwindow_system_version = Qnil; | |
2579 | } | |
2580 | } |