Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
c6c5df7f | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 8 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
22 | ||
23 | #include "config.h" | |
24 | #include <stdio.h> | |
25 | #include <ctype.h> | |
26 | ||
4588ec20 JB |
27 | #include "termchar.h" |
28 | #include "termopts.h" | |
3be08bea | 29 | #include "termhooks.h" |
4588ec20 JB |
30 | #include "cm.h" |
31 | #include "lisp.h" | |
32 | #include "dispextern.h" | |
33 | #include "buffer.h" | |
502b9b64 | 34 | #include "frame.h" |
4588ec20 JB |
35 | #include "window.h" |
36 | #include "commands.h" | |
37 | #include "disptab.h" | |
38 | #include "indent.h" | |
39 | ||
648fa17d | 40 | #include "systty.h" |
a41f8bed JB |
41 | #include "systime.h" |
42 | ||
4588ec20 JB |
43 | #ifdef HAVE_X_WINDOWS |
44 | #include "xterm.h" | |
45 | #endif /* HAVE_X_WINDOWS */ | |
46 | ||
47 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
48 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
49 | ||
50 | #ifndef PENDING_OUTPUT_COUNT | |
51 | /* Get number of chars of output now in the buffer of a stdio stream. | |
52 | This ought to be built in in stdio, but it isn't. | |
53 | Some s- files override this because their stdio internals differ. */ | |
54 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) | |
55 | #endif | |
56 | ||
a41f8bed | 57 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 58 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 59 | |
502b9b64 | 60 | int frame_garbaged; |
4588ec20 JB |
61 | |
62 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
63 | ||
64 | int display_completed; | |
65 | ||
66 | /* Lisp variable visible-bell; enables use of screen-flash | |
67 | instead of audible bell. */ | |
68 | ||
69 | int visible_bell; | |
70 | ||
502b9b64 | 71 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
72 | |
73 | int inverse_video; | |
74 | ||
75 | /* Line speed of the terminal. */ | |
76 | ||
77 | int baud_rate; | |
78 | ||
79 | /* nil or a symbol naming the window system under which emacs is | |
80 | running ('x is the only current possibility). */ | |
81 | ||
82 | Lisp_Object Vwindow_system; | |
83 | ||
84 | /* Version number of X windows: 10, 11 or nil. */ | |
85 | Lisp_Object Vwindow_system_version; | |
86 | ||
87 | /* Vector of glyph definitions. Indexed by glyph number, | |
88 | the contents are a string which is how to output the glyph. | |
89 | ||
90 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
91 | as a character code. */ | |
92 | ||
93 | Lisp_Object Vglyph_table; | |
94 | ||
95 | /* Display table to use for vectors that don't specify their own. */ | |
96 | ||
97 | Lisp_Object Vstandard_display_table; | |
98 | ||
99 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
100 | so put cursor on minibuffer after the prompt. |
101 | positive means at end of text in echo area; | |
102 | negative means at beginning of line. */ | |
4588ec20 JB |
103 | int cursor_in_echo_area; |
104 | \f | |
502b9b64 JB |
105 | /* The currently selected frame. |
106 | In a single-frame version, this variable always remains 0. */ | |
4588ec20 | 107 | |
502b9b64 | 108 | FRAME_PTR selected_frame; |
4588ec20 | 109 | |
502b9b64 JB |
110 | /* A frame which is not just a minibuffer, or 0 if there are no such |
111 | frames. This is usually the most recent such frame that was | |
112 | selected. In a single-frame version, this variable always remains 0. */ | |
113 | FRAME_PTR last_nonminibuf_frame; | |
e5d77022 | 114 | |
502b9b64 | 115 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
116 | exist inside frame objects lives in the following structure instead. |
117 | ||
118 | NOTE: the_only_frame is not checked for garbage collection; don't | |
119 | store collectable objects in any of its fields! | |
120 | ||
121 | You're not/The only frame in town/... */ | |
4588ec20 | 122 | |
502b9b64 JB |
123 | #ifndef MULTI_FRAME |
124 | struct frame the_only_frame; | |
e5d77022 | 125 | #endif |
4588ec20 JB |
126 | |
127 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
128 | which is used inside `update_frame' to hold the old contents |
129 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
130 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
131 | /* Length of vector currently allocated. */ |
132 | int ophys_lines_length; | |
133 | ||
134 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
135 | ||
136 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
137 | ||
138 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
139 | ||
4588ec20 | 140 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 141 | \f |
502b9b64 | 142 | #ifdef MULTI_FRAME |
4588ec20 | 143 | |
502b9b64 JB |
144 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
145 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
146 | (frame) | |
147 | Lisp_Object frame; | |
4588ec20 | 148 | { |
502b9b64 | 149 | FRAME_PTR f; |
4588ec20 | 150 | |
502b9b64 JB |
151 | CHECK_LIVE_FRAME (frame, 0); |
152 | f = XFRAME (frame); | |
153 | update_begin (f); | |
4588ec20 | 154 | /* set_terminal_modes (); */ |
502b9b64 | 155 | clear_frame (); |
b6a65ac2 | 156 | clear_frame_records (f); |
502b9b64 | 157 | update_end (f); |
4588ec20 | 158 | fflush (stdout); |
4588ec20 JB |
159 | windows_or_buffers_changed++; |
160 | /* Mark all windows as INaccurate, | |
161 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
162 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
163 | f->garbaged = 0; | |
4588ec20 JB |
164 | return Qnil; |
165 | } | |
166 | ||
502b9b64 JB |
167 | redraw_frame (f) |
168 | FRAME_PTR f; | |
4588ec20 | 169 | { |
502b9b64 JB |
170 | Lisp_Object frame; |
171 | XSET (frame, Lisp_Frame, f); | |
172 | Fredraw_frame (frame); | |
4588ec20 JB |
173 | } |
174 | ||
35f56f96 | 175 | #else |
4588ec20 | 176 | |
35f56f96 JB |
177 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, "", |
178 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
179 | (frame) | |
180 | Lisp_Object frame; | |
4588ec20 JB |
181 | { |
182 | update_begin (0); | |
183 | set_terminal_modes (); | |
502b9b64 | 184 | clear_frame (); |
4588ec20 JB |
185 | update_end (0); |
186 | fflush (stdout); | |
502b9b64 | 187 | clear_frame_records (0); |
4588ec20 JB |
188 | windows_or_buffers_changed++; |
189 | /* Mark all windows as INaccurate, | |
190 | so that every window will have its redisplay done. */ | |
b5c685f4 | 191 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
192 | return Qnil; |
193 | } | |
194 | ||
35f56f96 JB |
195 | #endif |
196 | ||
197 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
198 | "Clear and redisplay all visible frames.") | |
199 | () | |
200 | { | |
201 | Lisp_Object tail, frame; | |
202 | ||
203 | FOR_EACH_FRAME (tail, frame) | |
204 | /* If we simply redrew all visible frames, whether or not they | |
205 | were garbaged, then this would make all frames clear and | |
206 | nredraw whenever a new frame is created or an existing frame | |
207 | is de-iconified; those events set the global frame_garbaged | |
208 | flag, to which redisplay responds by calling this function. | |
209 | ||
210 | This used to redraw all visible frames; the only advantage of | |
211 | that approach is that if a frame changes from invisible to | |
212 | visible without setting its garbaged flag, it still gets | |
213 | redisplayed. But that should never happen; since invisible | |
214 | frames are not updated, they should always be marked as | |
215 | garbaged when they become visible again. If that doesn't | |
216 | happen, it's a bug in the visibility code, not a bug here. */ | |
217 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
218 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
219 | Fredraw_frame (frame); | |
220 | ||
221 | return Qnil; | |
222 | } | |
223 | ||
4588ec20 | 224 | \f |
502b9b64 JB |
225 | static struct frame_glyphs * |
226 | make_frame_glyphs (frame, empty) | |
227 | register FRAME_PTR frame; | |
4588ec20 JB |
228 | int empty; |
229 | { | |
230 | register int i; | |
502b9b64 JB |
231 | register width = FRAME_WIDTH (frame); |
232 | register height = FRAME_HEIGHT (frame); | |
233 | register struct frame_glyphs *new = | |
234 | (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 235 | |
502b9b64 | 236 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
237 | new->height = height; |
238 | new->width = width; | |
239 | new->used = (int *) xmalloc (height * sizeof (int)); | |
240 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
241 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
242 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
243 | bzero (new->enable, height * sizeof (char)); | |
244 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
245 | ||
246 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 247 | if (FRAME_X_P (frame)) |
4588ec20 | 248 | { |
4588ec20 JB |
249 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
250 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
251 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
252 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 253 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
254 | } |
255 | #endif | |
256 | ||
257 | if (empty) | |
258 | { | |
259 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 260 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 JB |
261 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
262 | ||
263 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
264 | bzero (new->total_contents, total_glyphs); | |
265 | } | |
266 | else | |
267 | { | |
268 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
269 | ||
270 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
271 | bzero (new->total_contents, total_glyphs); | |
272 | for (i = 0; i < height; i++) | |
273 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
274 | } | |
275 | ||
276 | return new; | |
277 | } | |
278 | ||
279 | static void | |
502b9b64 JB |
280 | free_frame_glyphs (frame, glyphs) |
281 | FRAME_PTR frame; | |
282 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
283 | { |
284 | if (glyphs->total_contents) | |
9ac0d9e0 | 285 | xfree (glyphs->total_contents); |
4588ec20 | 286 | |
9ac0d9e0 JB |
287 | xfree (glyphs->used); |
288 | xfree (glyphs->glyphs); | |
289 | xfree (glyphs->highlight); | |
290 | xfree (glyphs->enable); | |
291 | xfree (glyphs->bufp); | |
4588ec20 JB |
292 | |
293 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 294 | if (FRAME_X_P (frame)) |
4588ec20 | 295 | { |
9ac0d9e0 JB |
296 | xfree (glyphs->top_left_x); |
297 | xfree (glyphs->top_left_y); | |
298 | xfree (glyphs->pix_width); | |
299 | xfree (glyphs->pix_height); | |
300 | xfree (glyphs->max_ascent); | |
4588ec20 JB |
301 | } |
302 | #endif | |
303 | ||
9ac0d9e0 | 304 | xfree (glyphs); |
4588ec20 JB |
305 | } |
306 | ||
307 | static void | |
502b9b64 JB |
308 | remake_frame_glyphs (frame) |
309 | FRAME_PTR frame; | |
4588ec20 | 310 | { |
502b9b64 JB |
311 | if (FRAME_CURRENT_GLYPHS (frame)) |
312 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
313 | if (FRAME_DESIRED_GLYPHS (frame)) | |
314 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
315 | if (FRAME_TEMP_GLYPHS (frame)) | |
316 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
317 | ||
318 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
319 | { |
320 | /* Reallocate the frame's message buffer; remember that | |
321 | echo_area_glyphs may be pointing here. */ | |
322 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
323 | ||
324 | FRAME_MESSAGE_BUF (frame) | |
325 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
326 | FRAME_WIDTH (frame) + 1); | |
327 | ||
328 | if (echo_area_glyphs == old_message_buf) | |
329 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
330 | if (previous_echo_glyphs == old_message_buf) | |
331 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
332 | } | |
4588ec20 | 333 | else |
502b9b64 JB |
334 | FRAME_MESSAGE_BUF (frame) |
335 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 336 | |
502b9b64 JB |
337 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
338 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
339 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
340 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
341 | } |
342 | \f | |
502b9b64 | 343 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
344 | |
345 | static int | |
346 | line_hash_code (m, vpos) | |
502b9b64 | 347 | register struct frame_glyphs *m; |
4588ec20 JB |
348 | int vpos; |
349 | { | |
350 | register GLYPH *body, *end; | |
351 | register int h = 0; | |
352 | ||
353 | if (!m->enable[vpos]) | |
354 | return 0; | |
355 | ||
94aa5d2d | 356 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
357 | so as to encourage scrolling to leave them in place. */ |
358 | if (m->highlight[vpos]) | |
359 | return -1; | |
360 | ||
361 | body = m->glyphs[vpos]; | |
362 | ||
363 | if (must_write_spaces) | |
364 | while (1) | |
365 | { | |
366 | GLYPH g = *body++; | |
367 | ||
368 | if (g == 0) | |
369 | break; | |
370 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
371 | } | |
372 | else | |
373 | while (1) | |
374 | { | |
375 | GLYPH g = *body++; | |
376 | ||
377 | if (g == 0) | |
378 | break; | |
379 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
380 | } | |
381 | ||
382 | if (h) | |
383 | return h; | |
384 | return 1; | |
385 | } | |
386 | ||
387 | /* Return number of characters in line in M at vpos VPOS, | |
388 | except don't count leading and trailing spaces | |
389 | unless the terminal requires those to be explicitly output. */ | |
390 | ||
391 | static unsigned int | |
392 | line_draw_cost (m, vpos) | |
502b9b64 | 393 | struct frame_glyphs *m; |
4588ec20 JB |
394 | int vpos; |
395 | { | |
396 | register GLYPH *beg = m->glyphs[vpos]; | |
397 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
398 | register int i; | |
399 | register int tlen = GLYPH_TABLE_LENGTH; | |
400 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
401 | ||
402 | /* Ignore trailing and leading spaces if we can. */ | |
403 | if (!must_write_spaces) | |
404 | { | |
405 | while ((end != beg) && (*end == SPACEGLYPH)) | |
406 | --end; | |
407 | if (end == beg) | |
408 | return (0); /* All blank line. */ | |
409 | ||
410 | while (*beg == SPACEGLYPH) | |
411 | ++beg; | |
412 | } | |
413 | ||
414 | /* If we don't have a glyph-table, each glyph is one character, | |
415 | so return the number of glyphs. */ | |
416 | if (tbase == 0) | |
417 | return end - beg; | |
418 | ||
419 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
420 | i = 0; | |
421 | while ((beg <= end) && *beg) | |
422 | { | |
423 | register GLYPH g = *beg++; | |
424 | ||
425 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
426 | i += 1; | |
427 | else | |
428 | i += GLYPH_LENGTH (tbase, g); | |
429 | } | |
430 | return i; | |
431 | } | |
432 | \f | |
433 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
434 | ||
435 | The only other interface into redisplay is through setting | |
502b9b64 JB |
436 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
437 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
438 | |
439 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
440 | ||
502b9b64 | 441 | cancel_line (vpos, frame) |
4588ec20 | 442 | int vpos; |
502b9b64 | 443 | register FRAME_PTR frame; |
4588ec20 | 444 | { |
502b9b64 | 445 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
446 | } |
447 | ||
502b9b64 JB |
448 | clear_frame_records (frame) |
449 | register FRAME_PTR frame; | |
4588ec20 | 450 | { |
502b9b64 | 451 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
452 | } |
453 | ||
454 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
455 | ||
456 | void | |
502b9b64 JB |
457 | get_display_line (frame, vpos, hpos) |
458 | register FRAME_PTR frame; | |
4588ec20 JB |
459 | int vpos; |
460 | register int hpos; | |
461 | { | |
502b9b64 JB |
462 | register struct frame_glyphs *glyphs; |
463 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
464 | register GLYPH *p; |
465 | ||
7c3c72ec | 466 | if (vpos < 0) |
4588ec20 JB |
467 | abort (); |
468 | ||
469 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
470 | abort (); | |
471 | ||
472 | if (! desired_glyphs->enable[vpos]) | |
473 | { | |
474 | desired_glyphs->used[vpos] = 0; | |
475 | desired_glyphs->highlight[vpos] = 0; | |
476 | desired_glyphs->enable[vpos] = 1; | |
477 | } | |
478 | ||
479 | if (hpos > desired_glyphs->used[vpos]) | |
480 | { | |
481 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
482 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
483 | ||
484 | desired_glyphs->used[vpos] = hpos; | |
485 | while (g != end) | |
486 | *g++ = SPACEGLYPH; | |
487 | } | |
488 | } | |
489 | ||
490 | /* Like bcopy except never gets confused by overlap. */ | |
491 | ||
492 | void | |
493 | safe_bcopy (from, to, size) | |
494 | char *from, *to; | |
495 | int size; | |
496 | { | |
b5c685f4 | 497 | if (size <= 0 || from == to) |
4588ec20 JB |
498 | return; |
499 | ||
b5c685f4 JB |
500 | /* If the source and destination don't overlap, then bcopy can |
501 | handle it. If they do overlap, but the destination is lower in | |
502 | memory than the source, we'll assume bcopy can handle that. */ | |
503 | if (to < from || from + size <= to) | |
504 | bcopy (from, to, size); | |
505 | ||
506 | /* Otherwise, we'll copy from the end. */ | |
507 | else | |
4588ec20 | 508 | { |
b5c685f4 JB |
509 | register char *endf = from + size; |
510 | register char *endt = to + size; | |
4588ec20 JB |
511 | |
512 | /* If TO - FROM is large, then we should break the copy into | |
513 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
514 | TO - FROM is small, then the bcopy function call overhead | |
515 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
516 | anywhere. Since I don't think the obvious copy loop is too |
517 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
518 | if (to - from < 64) |
519 | { | |
520 | do | |
521 | *--endt = *--endf; | |
522 | while (endf != from); | |
523 | } | |
524 | else | |
525 | { | |
b5c685f4 | 526 | for (;;) |
4588ec20 JB |
527 | { |
528 | endt -= (to - from); | |
529 | endf -= (to - from); | |
530 | ||
b5c685f4 JB |
531 | if (endt < to) |
532 | break; | |
533 | ||
4588ec20 JB |
534 | bcopy (endf, endt, to - from); |
535 | } | |
b5c685f4 JB |
536 | |
537 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
538 | little left over. The amount left over is |
539 | (endt + (to - from)) - to, which is endt - from. */ | |
540 | bcopy (from, to, endt - from); | |
541 | } | |
542 | } | |
4588ec20 JB |
543 | } |
544 | ||
98038dc0 | 545 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
546 | DISTANCE may be negative. */ |
547 | ||
548 | static void | |
549 | rotate_vector (vector, size, distance) | |
550 | char *vector; | |
551 | int size; | |
552 | int distance; | |
553 | { | |
554 | char *temp = (char *) alloca (size); | |
555 | ||
556 | if (distance < 0) | |
557 | distance += size; | |
558 | ||
559 | bcopy (vector, temp + distance, size - distance); | |
560 | bcopy (vector + size - distance, temp, distance); | |
561 | bcopy (temp, vector, size); | |
562 | } | |
563 | ||
564 | /* Scroll lines from vpos FROM up to but not including vpos END | |
565 | down by AMOUNT lines (AMOUNT may be negative). | |
566 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
567 | ||
568 | int | |
502b9b64 JB |
569 | scroll_frame_lines (frame, from, end, amount) |
570 | register FRAME_PTR frame; | |
4588ec20 JB |
571 | int from, end, amount; |
572 | { | |
573 | register int i; | |
502b9b64 JB |
574 | register struct frame_glyphs *current_frame |
575 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
576 | |
577 | if (!line_ins_del_ok) | |
578 | return 0; | |
579 | ||
580 | if (amount == 0) | |
581 | return 1; | |
582 | ||
583 | if (amount > 0) | |
584 | { | |
502b9b64 | 585 | update_begin (frame); |
4588ec20 JB |
586 | set_terminal_window (end + amount); |
587 | if (!scroll_region_ok) | |
588 | ins_del_lines (end, -amount); | |
589 | ins_del_lines (from, amount); | |
590 | set_terminal_window (0); | |
591 | ||
502b9b64 | 592 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
593 | sizeof (GLYPH *) * (end + amount - from), |
594 | amount * sizeof (GLYPH *)); | |
595 | ||
502b9b64 JB |
596 | safe_bcopy (current_frame->used + from, |
597 | current_frame->used + from + amount, | |
598 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 599 | |
502b9b64 JB |
600 | safe_bcopy (current_frame->highlight + from, |
601 | current_frame->highlight + from + amount, | |
602 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 603 | |
502b9b64 JB |
604 | safe_bcopy (current_frame->enable + from, |
605 | current_frame->enable + from + amount, | |
606 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
607 | |
608 | /* Mark the lines made empty by scrolling as enabled, empty and | |
609 | normal video. */ | |
502b9b64 JB |
610 | bzero (current_frame->used + from, |
611 | amount * sizeof current_frame->used[0]); | |
612 | bzero (current_frame->highlight + from, | |
613 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
614 | for (i = from; i < from + amount; i++) |
615 | { | |
502b9b64 JB |
616 | current_frame->glyphs[i][0] = '\0'; |
617 | current_frame->enable[i] = 1; | |
4588ec20 JB |
618 | } |
619 | ||
502b9b64 JB |
620 | safe_bcopy (current_frame->bufp + from, |
621 | current_frame->bufp + from + amount, | |
622 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
623 | |
624 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 625 | if (FRAME_X_P (frame)) |
4588ec20 | 626 | { |
502b9b64 JB |
627 | safe_bcopy (current_frame->top_left_x + from, |
628 | current_frame->top_left_x + from + amount, | |
629 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 630 | |
502b9b64 JB |
631 | safe_bcopy (current_frame->top_left_y + from, |
632 | current_frame->top_left_y + from + amount, | |
633 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 634 | |
502b9b64 JB |
635 | safe_bcopy (current_frame->pix_width + from, |
636 | current_frame->pix_width + from + amount, | |
637 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 638 | |
502b9b64 JB |
639 | safe_bcopy (current_frame->pix_height + from, |
640 | current_frame->pix_height + from + amount, | |
641 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
642 | |
643 | safe_bcopy (current_frame->max_ascent + from, | |
644 | current_frame->max_ascent + from + amount, | |
645 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
646 | } |
647 | #endif /* HAVE_X_WINDOWS */ | |
648 | ||
502b9b64 | 649 | update_end (frame); |
4588ec20 JB |
650 | } |
651 | if (amount < 0) | |
652 | { | |
502b9b64 | 653 | update_begin (frame); |
4588ec20 JB |
654 | set_terminal_window (end); |
655 | ins_del_lines (from + amount, amount); | |
656 | if (!scroll_region_ok) | |
657 | ins_del_lines (end + amount, -amount); | |
658 | set_terminal_window (0); | |
659 | ||
502b9b64 | 660 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
661 | sizeof (GLYPH *) * (end - from - amount), |
662 | amount * sizeof (GLYPH *)); | |
663 | ||
502b9b64 JB |
664 | safe_bcopy (current_frame->used + from, |
665 | current_frame->used + from + amount, | |
666 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 667 | |
502b9b64 JB |
668 | safe_bcopy (current_frame->highlight + from, |
669 | current_frame->highlight + from + amount, | |
670 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 671 | |
502b9b64 JB |
672 | safe_bcopy (current_frame->enable + from, |
673 | current_frame->enable + from + amount, | |
674 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
675 | |
676 | /* Mark the lines made empty by scrolling as enabled, empty and | |
677 | normal video. */ | |
502b9b64 JB |
678 | bzero (current_frame->used + end + amount, |
679 | - amount * sizeof current_frame->used[0]); | |
680 | bzero (current_frame->highlight + end + amount, | |
681 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
682 | for (i = end + amount; i < end; i++) |
683 | { | |
502b9b64 JB |
684 | current_frame->glyphs[i][0] = '\0'; |
685 | current_frame->enable[i] = 1; | |
4588ec20 JB |
686 | } |
687 | ||
502b9b64 JB |
688 | safe_bcopy (current_frame->bufp + from, |
689 | current_frame->bufp + from + amount, | |
690 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
691 | |
692 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 693 | if (FRAME_X_P (frame)) |
4588ec20 | 694 | { |
502b9b64 JB |
695 | safe_bcopy (current_frame->top_left_x + from, |
696 | current_frame->top_left_x + from + amount, | |
697 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 698 | |
502b9b64 JB |
699 | safe_bcopy (current_frame->top_left_y + from, |
700 | current_frame->top_left_y + from + amount, | |
701 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 702 | |
502b9b64 JB |
703 | safe_bcopy (current_frame->pix_width + from, |
704 | current_frame->pix_width + from + amount, | |
705 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 706 | |
502b9b64 JB |
707 | safe_bcopy (current_frame->pix_height + from, |
708 | current_frame->pix_height + from + amount, | |
709 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
710 | |
711 | safe_bcopy (current_frame->max_ascent + from, | |
712 | current_frame->max_ascent + from + amount, | |
713 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
714 | } |
715 | #endif /* HAVE_X_WINDOWS */ | |
716 | ||
502b9b64 | 717 | update_end (frame); |
4588ec20 JB |
718 | } |
719 | return 1; | |
720 | } | |
721 | \f | |
502b9b64 | 722 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 723 | copy all the columns that W does not occupy |
502b9b64 JB |
724 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
725 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
726 | |
727 | preserve_other_columns (w) | |
728 | struct window *w; | |
729 | { | |
730 | register int vpos; | |
502b9b64 JB |
731 | register struct frame_glyphs *current_frame, *desired_frame; |
732 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
733 | int start = XFASTINT (w->left); |
734 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
735 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
736 | ||
502b9b64 JB |
737 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
738 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
739 | |
740 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
741 | { | |
502b9b64 | 742 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
743 | { |
744 | if (start > 0) | |
745 | { | |
746 | int len; | |
747 | ||
502b9b64 | 748 | bcopy (current_frame->glyphs[vpos], |
aec9f5f6 JB |
749 | desired_frame->glyphs[vpos], |
750 | start * sizeof (current_frame->glyphs[vpos])); | |
502b9b64 JB |
751 | len = min (start, current_frame->used[vpos]); |
752 | if (desired_frame->used[vpos] < len) | |
753 | desired_frame->used[vpos] = len; | |
4588ec20 | 754 | } |
502b9b64 JB |
755 | if (current_frame->used[vpos] > end |
756 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 757 | { |
502b9b64 JB |
758 | while (desired_frame->used[vpos] < end) |
759 | desired_frame->glyphs[vpos][desired_frame->used[vpos]++] | |
4588ec20 | 760 | = SPACEGLYPH; |
502b9b64 JB |
761 | bcopy (current_frame->glyphs[vpos] + end, |
762 | desired_frame->glyphs[vpos] + end, | |
aec9f5f6 JB |
763 | ((current_frame->used[vpos] - end) |
764 | * sizeof (current_frame->glyphs[vpos]))); | |
502b9b64 | 765 | desired_frame->used[vpos] = current_frame->used[vpos]; |
4588ec20 JB |
766 | } |
767 | } | |
768 | } | |
769 | } | |
770 | \f | |
771 | #if 0 | |
772 | ||
502b9b64 | 773 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 774 | copy all the columns that w does occupy |
502b9b64 JB |
775 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
776 | so that update_frame will not change those columns. | |
4588ec20 JB |
777 | |
778 | Have not been able to figure out how to use this correctly. */ | |
779 | ||
780 | preserve_my_columns (w) | |
781 | struct window *w; | |
782 | { | |
783 | register int vpos, fin; | |
502b9b64 JB |
784 | register struct frame_glyphs *l1, *l2; |
785 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
786 | int start = XFASTINT (w->left); |
787 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
788 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
789 | ||
790 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
791 | { | |
502b9b64 JB |
792 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
793 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
794 | { |
795 | if (l2->length > start && l1->length < l2->length) | |
796 | { | |
797 | fin = l2->length; | |
798 | if (fin > end) fin = end; | |
799 | while (l1->length < start) | |
800 | l1->body[l1->length++] = ' '; | |
801 | bcopy (l2->body + start, l1->body + start, fin - start); | |
802 | l1->length = fin; | |
803 | } | |
804 | } | |
805 | } | |
806 | } | |
807 | ||
808 | #endif | |
809 | \f | |
810 | /* On discovering that the redisplay for a window was no good, | |
811 | cancel the columns of that window, so that when the window is | |
812 | displayed over again get_display_line will not complain. */ | |
813 | ||
814 | cancel_my_columns (w) | |
815 | struct window *w; | |
816 | { | |
817 | register int vpos; | |
502b9b64 JB |
818 | register struct frame_glyphs *desired_glyphs = |
819 | FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
820 | register int start = XFASTINT (w->left); |
821 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
822 | ||
823 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
824 | if (desired_glyphs->enable[vpos] | |
825 | && desired_glyphs->used[vpos] >= start) | |
826 | desired_glyphs->used[vpos] = start; | |
827 | } | |
828 | \f | |
502b9b64 | 829 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
830 | the necessary output for one change in the buffer. |
831 | They may return 0 meaning nothing was done if anything is difficult, | |
832 | or 1 meaning the output was performed properly. | |
502b9b64 | 833 | They assume that the frame was up to date before the buffer |
94aa5d2d | 834 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
835 | see command_loop_1 where these are called. */ |
836 | ||
837 | int | |
838 | direct_output_for_insert (g) | |
839 | int g; | |
840 | { | |
502b9b64 JB |
841 | register FRAME_PTR frame = selected_frame; |
842 | register struct frame_glyphs *current_frame | |
843 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
844 | |
845 | #ifndef COMPILER_REGISTER_BUG | |
846 | register | |
847 | #endif /* COMPILER_REGISTER_BUG */ | |
848 | struct window *w = XWINDOW (selected_window); | |
849 | #ifndef COMPILER_REGISTER_BUG | |
850 | register | |
851 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 852 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
853 | #ifndef COMPILER_REGISTER_BUG |
854 | register | |
855 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 856 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 857 | |
fa61c701 JB |
858 | /* Give up if about to continue line. */ |
859 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
860 | ||
4588ec20 JB |
861 | /* Avoid losing if cursor is in invisible text off left margin */ |
862 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
863 | ||
864 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 865 | || cursor_in_echo_area |
502b9b64 JB |
866 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
867 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 868 | |
502b9b64 | 869 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
870 | || !display_completed |
871 | ||
872 | /* Give up if buffer appears in two places. */ | |
873 | || buffer_shared > 1 | |
874 | ||
875 | /* Give up if w is minibuffer and a message is being displayed there */ | |
876 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
877 | return 0; | |
878 | ||
517b2e01 JB |
879 | { |
880 | #ifdef HAVE_X_WINDOWS | |
881 | int dummy; | |
de83c314 | 882 | int face = compute_char_face (frame, w, point, -1, -1, &dummy); |
517b2e01 JB |
883 | #else |
884 | int face = 0; | |
885 | #endif | |
886 | ||
887 | current_frame->glyphs[vpos][hpos] = MAKE_GLYPH (g, face); | |
888 | } | |
4588ec20 JB |
889 | unchanged_modified = MODIFF; |
890 | beg_unchanged = GPT - BEG; | |
891 | XFASTINT (w->last_point) = point; | |
892 | XFASTINT (w->last_point_x) = hpos; | |
893 | XFASTINT (w->last_modified) = MODIFF; | |
894 | ||
895 | reassert_line_highlight (0, vpos); | |
502b9b64 | 896 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 897 | fflush (stdout); |
502b9b64 JB |
898 | ++FRAME_CURSOR_X (frame); |
899 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 900 | { |
502b9b64 JB |
901 | current_frame->used[vpos] = hpos + 1; |
902 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
903 | } |
904 | ||
905 | return 1; | |
906 | } | |
907 | ||
908 | int | |
909 | direct_output_forward_char (n) | |
910 | int n; | |
911 | { | |
502b9b64 | 912 | register FRAME_PTR frame = selected_frame; |
4588ec20 JB |
913 | register struct window *w = XWINDOW (selected_window); |
914 | ||
a9764248 JB |
915 | /* Avoid losing if cursor is in invisible text off left margin |
916 | or about to go off either side of window. */ | |
502b9b64 | 917 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
918 | && (XINT (w->hscroll) || n < 0)) |
919 | || (n > 0 | |
fa61c701 | 920 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 921 | || cursor_in_echo_area) |
4588ec20 JB |
922 | return 0; |
923 | ||
de83c314 RS |
924 | /* Can't use direct output if highlighting a region. */ |
925 | if (!NILP (Vtransient_mark_mode) && !NILP (current_buffer->mark_active)) | |
926 | return 0; | |
927 | ||
502b9b64 JB |
928 | FRAME_CURSOR_X (frame) += n; |
929 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); | |
4588ec20 | 930 | XFASTINT (w->last_point) = point; |
502b9b64 | 931 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 JB |
932 | fflush (stdout); |
933 | return 1; | |
934 | } | |
935 | \f | |
936 | static void update_line (); | |
937 | ||
502b9b64 | 938 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
939 | Value is nonzero if redisplay stopped due to pending input. |
940 | FORCE nonzero means do not stop for pending input. */ | |
941 | ||
942 | int | |
502b9b64 JB |
943 | update_frame (f, force, inhibit_hairy_id) |
944 | FRAME_PTR f; | |
4588ec20 JB |
945 | int force; |
946 | int inhibit_hairy_id; | |
947 | { | |
502b9b64 JB |
948 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (f); |
949 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (f); | |
4588ec20 JB |
950 | register int i; |
951 | int pause; | |
952 | int preempt_count = baud_rate / 2400 + 1; | |
953 | extern input_pending; | |
954 | #ifdef HAVE_X_WINDOWS | |
955 | register int downto, leftmost; | |
956 | #endif | |
957 | ||
502b9b64 | 958 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
959 | |
960 | detect_input_pending (); | |
961 | if (input_pending && !force) | |
962 | { | |
963 | pause = 1; | |
964 | goto do_pause; | |
965 | } | |
966 | ||
502b9b64 | 967 | update_begin (f); |
4588ec20 JB |
968 | |
969 | if (!line_ins_del_ok) | |
970 | inhibit_hairy_id = 1; | |
971 | ||
efb859b4 JB |
972 | /* See if any of the desired lines are enabled; don't compute for |
973 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
974 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
975 | if (desired_frame->enable[i]) | |
4588ec20 JB |
976 | break; |
977 | ||
978 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
979 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
980 | force |= scrolling (f); | |
4588ec20 JB |
981 | |
982 | /* Update the individual lines as needed. Do bottom line first. */ | |
983 | ||
502b9b64 JB |
984 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
985 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
986 | |
987 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 988 | if (FRAME_X_P (f)) |
4588ec20 | 989 | { |
502b9b64 JB |
990 | leftmost = downto = f->display.x->internal_border_width; |
991 | if (desired_frame->enable[0]) | |
4588ec20 | 992 | { |
502b9b64 JB |
993 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
994 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
995 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 996 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
997 | current_frame->top_left_x[0] = leftmost; |
998 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
999 | } |
1000 | } | |
1001 | #endif /* HAVE_X_WINDOWS */ | |
1002 | ||
1003 | /* Now update the rest of the lines. */ | |
502b9b64 | 1004 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 1005 | { |
502b9b64 | 1006 | if (desired_frame->enable[i]) |
4588ec20 | 1007 | { |
b6a65ac2 | 1008 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
1009 | { |
1010 | /* Flush out every so many lines. | |
1011 | Also flush out if likely to have more than 1k buffered | |
1012 | otherwise. I'm told that some telnet connections get | |
1013 | really screwed by more than 1k output at once. */ | |
1014 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1015 | if (outq > 900 | |
1016 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1017 | { | |
1018 | fflush (stdout); | |
1019 | if (preempt_count == 1) | |
1020 | { | |
a41f8bed JB |
1021 | #ifdef EMACS_OUTQSIZE |
1022 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1023 | /* Probably not a tty. Ignore the error and reset |
1024 | * the outq count. */ | |
1025 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1026 | #endif | |
1027 | outq *= 10; | |
1028 | sleep (outq / baud_rate); | |
1029 | } | |
1030 | } | |
1031 | if ((i - 1) % preempt_count == 0) | |
1032 | detect_input_pending (); | |
1033 | } | |
1034 | ||
502b9b64 | 1035 | update_line (f, i); |
4588ec20 | 1036 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1037 | if (FRAME_X_P (f)) |
4588ec20 | 1038 | { |
502b9b64 JB |
1039 | current_frame->top_left_y[i] = downto; |
1040 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1041 | } |
1042 | #endif /* HAVE_X_WINDOWS */ | |
1043 | } | |
1044 | ||
e5d77022 | 1045 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1046 | if (FRAME_X_P (f)) |
448fd7c0 | 1047 | downto += current_frame->pix_height[i]; |
e5d77022 | 1048 | #endif |
4588ec20 | 1049 | } |
502b9b64 | 1050 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1051 | |
1052 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1053 | if (!pause) | |
1054 | { | |
648fa17d JB |
1055 | if (cursor_in_echo_area |
1056 | && FRAME_HAS_MINIBUF_P (f)) | |
1113d9db | 1057 | { |
648fa17d JB |
1058 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1059 | int row, col; | |
1060 | ||
1061 | if (cursor_in_echo_area < 0) | |
1062 | { | |
1063 | row = top; | |
1064 | col = 0; | |
1065 | } | |
1113d9db | 1066 | else |
648fa17d JB |
1067 | { |
1068 | /* If the minibuffer is several lines high, find the last | |
1069 | line that has any text on it. */ | |
1070 | row = FRAME_HEIGHT (f); | |
1071 | do | |
1072 | { | |
1073 | row--; | |
1074 | if (current_frame->enable[row]) | |
1075 | col = current_frame->used[row]; | |
1076 | else | |
1077 | col = 0; | |
1078 | } | |
1079 | while (row > top && col == 0); | |
1080 | ||
1081 | if (col >= FRAME_WIDTH (f)) | |
1082 | { | |
1083 | col = 0; | |
1084 | if (row < FRAME_HEIGHT (f) - 1) | |
1085 | row++; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | cursor_to (row, col); | |
1113d9db | 1090 | } |
4588ec20 | 1091 | else |
502b9b64 JB |
1092 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1093 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1094 | } |
1095 | ||
502b9b64 | 1096 | update_end (f); |
4588ec20 JB |
1097 | |
1098 | if (termscript) | |
1099 | fflush (termscript); | |
1100 | fflush (stdout); | |
1101 | ||
1102 | /* Here if output is preempted because input is detected. */ | |
1103 | do_pause: | |
1104 | ||
502b9b64 | 1105 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1106 | display_completed = !pause; |
1107 | ||
502b9b64 | 1108 | bzero (desired_frame->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1109 | return pause; |
1110 | } | |
1111 | ||
1112 | /* Called when about to quit, to check for doing so | |
1113 | at an improper time. */ | |
1114 | ||
1115 | void | |
1116 | quit_error_check () | |
1117 | { | |
502b9b64 | 1118 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1119 | return; |
502b9b64 | 1120 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1121 | abort (); |
502b9b64 | 1122 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1123 | abort (); |
1124 | } | |
1125 | \f | |
1126 | /* Decide what insert/delete line to do, and do it */ | |
1127 | ||
1128 | extern void scrolling_1 (); | |
1129 | ||
502b9b64 JB |
1130 | scrolling (frame) |
1131 | FRAME_PTR frame; | |
4588ec20 JB |
1132 | { |
1133 | int unchanged_at_top, unchanged_at_bottom; | |
1134 | int window_size; | |
1135 | int changed_lines; | |
502b9b64 JB |
1136 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1137 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1138 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
4588ec20 | 1139 | register int i; |
502b9b64 JB |
1140 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1141 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1142 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1143 | |
1144 | /* Compute hash codes of all the lines. | |
1145 | Also calculate number of changed lines, | |
1146 | number of unchanged lines at the beginning, | |
1147 | and number of unchanged lines at the end. */ | |
1148 | ||
1149 | changed_lines = 0; | |
1150 | unchanged_at_top = 0; | |
502b9b64 JB |
1151 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1152 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1153 | { |
1154 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1155 | if (!current_frame->enable[i]) |
4588ec20 | 1156 | return 0; |
502b9b64 JB |
1157 | old_hash[i] = line_hash_code (current_frame, i); |
1158 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1159 | new_hash[i] = old_hash[i]; |
1160 | else | |
502b9b64 | 1161 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1162 | |
1163 | if (old_hash[i] != new_hash[i]) | |
1164 | { | |
1165 | changed_lines++; | |
502b9b64 | 1166 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1167 | } |
1168 | else if (i == unchanged_at_top) | |
1169 | unchanged_at_top++; | |
502b9b64 | 1170 | draw_cost[i] = line_draw_cost (desired_frame, i); |
4588ec20 JB |
1171 | } |
1172 | ||
1173 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1174 | if (changed_lines < baud_rate / 2400 | |
502b9b64 | 1175 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1176 | return 1; |
1177 | ||
502b9b64 | 1178 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1179 | - unchanged_at_bottom); |
1180 | ||
1181 | if (scroll_region_ok) | |
1182 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1183 | else if (memory_below_frame) |
4588ec20 JB |
1184 | free_at_end_vpos = -1; |
1185 | ||
1186 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1187 | current frame and desired frame, don't bother with i/d calc. */ |
4588ec20 JB |
1188 | if (window_size >= 18 && baud_rate > 2400 |
1189 | && (window_size >= | |
1190 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1191 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1192 | old_hash, new_hash, draw_cost))) |
1193 | return 0; | |
1194 | ||
502b9b64 | 1195 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 JB |
1196 | draw_cost + unchanged_at_top - 1, |
1197 | old_hash + unchanged_at_top - 1, | |
1198 | new_hash + unchanged_at_top - 1, | |
1199 | free_at_end_vpos - unchanged_at_top); | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | \f | |
1204 | /* Return the offset in its buffer of the character at location col, line | |
1205 | in the given window. */ | |
1206 | int | |
1207 | buffer_posn_from_coords (window, col, line) | |
1208 | struct window *window; | |
1209 | int col, line; | |
1210 | { | |
1211 | int window_left = XFASTINT (window->left); | |
1212 | ||
1213 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1214 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1215 | window. */ | |
fa61c701 | 1216 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1217 | |
efb859b4 | 1218 | int startp = marker_position (window->start); |
4588ec20 JB |
1219 | |
1220 | /* Since compute_motion will only operate on the current buffer, | |
1221 | we need to save the old one and restore it when we're done. */ | |
1222 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1223 | struct position *posn; |
4588ec20 JB |
1224 | |
1225 | current_buffer = XBUFFER (window->buffer); | |
1226 | ||
502b9b64 JB |
1227 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1228 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1229 | the window, but it isn't maintained correctly, and I'm not even |
1230 | sure I will keep it. */ | |
1231 | posn = compute_motion (startp, 0, | |
1232 | (window == XWINDOW (minibuf_window) && startp == 1 | |
1233 | ? minibuf_prompt_width : 0), | |
1234 | ZV, line, col - window_left, | |
1235 | window_width, XINT (window->hscroll), 0); | |
4588ec20 JB |
1236 | |
1237 | current_buffer = old_current_buffer; | |
1238 | ||
502b9b64 | 1239 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1240 | to be *after* the newline, i.e. at the start of the next line. |
1241 | This is reasonable, but not really what we want. So if the | |
1242 | result is on a line below LINE, back it up one character. */ | |
1243 | if (posn->vpos > line) | |
1244 | return posn->bufpos - 1; | |
1245 | else | |
1246 | return posn->bufpos; | |
4588ec20 JB |
1247 | } |
1248 | \f | |
1249 | static int | |
1250 | count_blanks (r) | |
1251 | register GLYPH *r; | |
1252 | { | |
1253 | register GLYPH *p = r; | |
94aa5d2d RS |
1254 | while (*p++ == SPACEGLYPH); |
1255 | return p - r - 1; | |
4588ec20 JB |
1256 | } |
1257 | ||
1258 | static int | |
1259 | count_match (str1, str2) | |
1260 | GLYPH *str1, *str2; | |
1261 | { | |
1262 | register GLYPH *p1 = str1; | |
1263 | register GLYPH *p2 = str2; | |
1264 | while (*p1++ == *p2++); | |
1265 | return p1 - str1 - 1; | |
1266 | } | |
1267 | ||
1268 | /* Char insertion/deletion cost vector, from term.c */ | |
1269 | extern int *char_ins_del_vector; | |
1270 | ||
945807a3 | 1271 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1272 | |
1273 | static void | |
502b9b64 JB |
1274 | update_line (frame, vpos) |
1275 | register FRAME_PTR frame; | |
4588ec20 JB |
1276 | int vpos; |
1277 | { | |
1278 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1279 | int tem; | |
1280 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1281 | int save; | |
502b9b64 JB |
1282 | register struct frame_glyphs *current_frame |
1283 | = FRAME_CURRENT_GLYPHS (frame); | |
1284 | register struct frame_glyphs *desired_frame | |
1285 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1286 | |
502b9b64 JB |
1287 | if (desired_frame->highlight[vpos] |
1288 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1289 | { |
502b9b64 JB |
1290 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1291 | (current_frame->enable[vpos] ? | |
1292 | current_frame->used[vpos] : 0)); | |
1293 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1294 | } |
1295 | else | |
502b9b64 | 1296 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1297 | |
502b9b64 | 1298 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1299 | { |
1300 | olen = 0; | |
1301 | } | |
1302 | else | |
1303 | { | |
502b9b64 JB |
1304 | obody = current_frame->glyphs[vpos]; |
1305 | olen = current_frame->used[vpos]; | |
1306 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1307 | { |
1308 | if (!must_write_spaces) | |
1309 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1310 | olen--; | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1315 | spaces all the way to the frame edge |
4588ec20 JB |
1316 | so that the reverse video extends all the way across. */ |
1317 | ||
502b9b64 | 1318 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1319 | obody[olen++] = SPACEGLYPH; |
1320 | } | |
1321 | } | |
1322 | ||
1323 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1324 | current_frame->enable[vpos] = 1; |
1325 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1326 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1327 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1328 | |
1329 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1330 | if (FRAME_X_P (frame)) |
4588ec20 | 1331 | { |
502b9b64 JB |
1332 | current_frame->pix_width[vpos] |
1333 | = current_frame->used[vpos] | |
1334 | * FONT_WIDTH (frame->display.x->font); | |
1335 | current_frame->pix_height[vpos] | |
1336 | = FONT_HEIGHT (frame->display.x->font); | |
4588ec20 JB |
1337 | } |
1338 | #endif /* HAVE_X_WINDOWS */ | |
1339 | ||
502b9b64 | 1340 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1341 | { |
1342 | nlen = 0; | |
1343 | goto just_erase; | |
1344 | } | |
1345 | ||
502b9b64 JB |
1346 | nbody = desired_frame->glyphs[vpos]; |
1347 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1348 | |
1349 | /* Pretend trailing spaces are not there at all, | |
1350 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1351 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1352 | { |
1353 | if (!must_write_spaces) | |
1354 | /* We know that the previous character byte contains 0. */ | |
1355 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1356 | nlen--; | |
1357 | } | |
1358 | else | |
1359 | { | |
1360 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1361 | all the way to the frame edge |
4588ec20 JB |
1362 | so that the reverse video extends all the way across. */ |
1363 | ||
502b9b64 | 1364 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1365 | nbody[nlen++] = SPACEGLYPH; |
1366 | } | |
1367 | ||
1368 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1369 | if (!char_ins_del_ok) | |
1370 | { | |
1371 | int i,j; | |
1372 | ||
1373 | for (i = 0; i < nlen; i++) | |
1374 | { | |
1375 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1376 | { | |
1377 | cursor_to (vpos, i); | |
1378 | for (j = 1; (i + j < nlen && | |
1379 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1380 | j++); | |
1381 | ||
1382 | /* Output this run of non-matching chars. */ | |
1383 | write_glyphs (nbody + i, j); | |
1384 | i += j - 1; | |
1385 | ||
1386 | /* Now find the next non-match. */ | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1391 | if (olen > nlen) | |
1392 | { | |
1393 | cursor_to (vpos, nlen); | |
1394 | clear_end_of_line (olen); | |
1395 | } | |
1396 | ||
502b9b64 JB |
1397 | /* Exchange contents between current_frame and new_frame. */ |
1398 | temp = desired_frame->glyphs[vpos]; | |
1399 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1400 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1401 | |
1402 | return; | |
1403 | } | |
1404 | ||
1405 | if (!olen) | |
1406 | { | |
502b9b64 | 1407 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1408 | ? 0 : count_blanks (nbody); |
1409 | if (nlen > nsp) | |
1410 | { | |
1411 | cursor_to (vpos, nsp); | |
1412 | write_glyphs (nbody + nsp, nlen - nsp); | |
1413 | } | |
1414 | ||
502b9b64 JB |
1415 | /* Exchange contents between current_frame and new_frame. */ |
1416 | temp = desired_frame->glyphs[vpos]; | |
1417 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1418 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1419 | |
1420 | return; | |
1421 | } | |
1422 | ||
1423 | obody[olen] = 1; | |
1424 | save = nbody[nlen]; | |
1425 | nbody[nlen] = 0; | |
1426 | ||
1427 | /* Compute number of leading blanks in old and new contents. */ | |
1428 | osp = count_blanks (obody); | |
502b9b64 | 1429 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1430 | nsp = count_blanks (nbody); |
1431 | else | |
1432 | nsp = 0; | |
1433 | ||
1434 | /* Compute number of matching chars starting with first nonblank. */ | |
1435 | begmatch = count_match (obody + osp, nbody + nsp); | |
1436 | ||
1437 | /* Spaces in new match implicit space past the end of old. */ | |
1438 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1439 | if (!must_write_spaces && osp + begmatch == olen) | |
1440 | { | |
1441 | np1 = nbody + nsp; | |
1442 | while (np1[begmatch] == SPACEGLYPH) | |
1443 | begmatch++; | |
1444 | } | |
1445 | ||
1446 | /* Avoid doing insert/delete char | |
1447 | just cause number of leading spaces differs | |
1448 | when the following text does not match. */ | |
1449 | if (begmatch == 0 && osp != nsp) | |
1450 | osp = nsp = min (osp, nsp); | |
1451 | ||
1452 | /* Find matching characters at end of line */ | |
1453 | op1 = obody + olen; | |
1454 | np1 = nbody + nlen; | |
1455 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1456 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1457 | { | |
1458 | op1--; | |
1459 | np1--; | |
1460 | } | |
1461 | endmatch = obody + olen - op1; | |
1462 | ||
1463 | /* Put correct value back in nbody[nlen]. | |
1464 | This is important because direct_output_for_insert | |
1465 | can write into the line at a later point. | |
1466 | If this screws up the zero at the end of the line, re-establish it. */ | |
1467 | nbody[nlen] = save; | |
1468 | obody[olen] = 0; | |
1469 | ||
1470 | /* tem gets the distance to insert or delete. | |
1471 | endmatch is how many characters we save by doing so. | |
1472 | Is it worth it? */ | |
1473 | ||
1474 | tem = (nlen - nsp) - (olen - osp); | |
1475 | if (endmatch && tem | |
502b9b64 | 1476 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1477 | endmatch = 0; |
1478 | ||
1479 | /* nsp - osp is the distance to insert or delete. | |
1480 | If that is nonzero, begmatch is known to be nonzero also. | |
1481 | begmatch + endmatch is how much we save by doing the ins/del. | |
1482 | Is it worth it? */ | |
1483 | ||
1484 | if (nsp != osp | |
1485 | && (!char_ins_del_ok | |
502b9b64 | 1486 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1487 | { |
1488 | begmatch = 0; | |
1489 | endmatch = 0; | |
1490 | osp = nsp = min (osp, nsp); | |
1491 | } | |
1492 | ||
1493 | /* Now go through the line, inserting, writing and | |
1494 | deleting as appropriate. */ | |
1495 | ||
1496 | if (osp > nsp) | |
1497 | { | |
1498 | cursor_to (vpos, nsp); | |
1499 | delete_glyphs (osp - nsp); | |
1500 | } | |
1501 | else if (nsp > osp) | |
1502 | { | |
1503 | /* If going to delete chars later in line | |
1504 | and insert earlier in the line, | |
1505 | must delete first to avoid losing data in the insert */ | |
1506 | if (endmatch && nlen < olen + nsp - osp) | |
1507 | { | |
1508 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1509 | delete_glyphs (olen + nsp - osp - nlen); | |
1510 | olen = nlen - (nsp - osp); | |
1511 | } | |
1512 | cursor_to (vpos, osp); | |
1513 | insert_glyphs ((char *)0, nsp - osp); | |
1514 | } | |
1515 | olen += nsp - osp; | |
1516 | ||
1517 | tem = nsp + begmatch + endmatch; | |
1518 | if (nlen != tem || olen != tem) | |
1519 | { | |
1520 | cursor_to (vpos, nsp + begmatch); | |
1521 | if (!endmatch || nlen == olen) | |
1522 | { | |
1523 | /* If new text being written reaches right margin, | |
1524 | there is no need to do clear-to-eol at the end. | |
1525 | (and it would not be safe, since cursor is not | |
1526 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1527 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1528 | olen = 0; |
1529 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1530 | ||
1531 | #ifdef obsolete | |
1532 | ||
1533 | /* the following code loses disastrously if tem == nlen. | |
1534 | Rather than trying to fix that case, I am trying the simpler | |
1535 | solution found above. */ | |
1536 | ||
1537 | /* If the text reaches to the right margin, | |
1538 | it will lose one way or another (depending on AutoWrap) | |
1539 | to clear to end of line after outputting all the text. | |
1540 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1541 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1542 | { |
1543 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1544 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1545 | clear_end_of_line (olen); | |
1546 | olen = 0; /* Don't let it be cleared again later */ | |
1547 | write_glyphs (nbody + nlen - 1, 1); | |
1548 | } | |
1549 | else | |
1550 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1551 | #endif /* OBSOLETE */ | |
1552 | ||
1553 | } | |
1554 | else if (nlen > olen) | |
1555 | { | |
1556 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1557 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1558 | olen = nlen; | |
1559 | } | |
1560 | else if (olen > nlen) | |
1561 | { | |
1562 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1563 | delete_glyphs (olen - nlen); | |
1564 | olen = nlen; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | just_erase: | |
1569 | /* If any unerased characters remain after the new line, erase them. */ | |
1570 | if (olen > nlen) | |
1571 | { | |
1572 | cursor_to (vpos, nlen); | |
1573 | clear_end_of_line (olen); | |
1574 | } | |
1575 | ||
502b9b64 JB |
1576 | /* Exchange contents between current_frame and new_frame. */ |
1577 | temp = desired_frame->glyphs[vpos]; | |
1578 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1579 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1580 | } |
1581 | \f | |
1582 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1583 | 1, 1, "FOpen termscript file: ", | |
1584 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1585 | FILE = nil means just close any termscript file currently open.") | |
1586 | (file) | |
1587 | Lisp_Object file; | |
1588 | { | |
1589 | if (termscript != 0) fclose (termscript); | |
1590 | termscript = 0; | |
1591 | ||
efb859b4 | 1592 | if (! NILP (file)) |
4588ec20 JB |
1593 | { |
1594 | file = Fexpand_file_name (file, Qnil); | |
1595 | termscript = fopen (XSTRING (file)->data, "w"); | |
1596 | if (termscript == 0) | |
1597 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1598 | } | |
1599 | return Qnil; | |
1600 | } | |
1601 | \f | |
1602 | ||
1603 | #ifdef SIGWINCH | |
efb859b4 | 1604 | SIGTYPE |
4588ec20 JB |
1605 | window_change_signal () |
1606 | { | |
1607 | int width, height; | |
1608 | extern int errno; | |
1609 | int old_errno = errno; | |
1610 | ||
502b9b64 | 1611 | get_frame_size (&width, &height); |
4588ec20 | 1612 | |
502b9b64 JB |
1613 | /* The frame size change obviously applies to a termcap-controlled |
1614 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 1615 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 1616 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
1617 | but don't reallocate the data structures now. Let that be done |
1618 | later outside of the signal handler. */ | |
1619 | ||
1620 | { | |
35f56f96 | 1621 | Lisp_Object tail, frame; |
4588ec20 | 1622 | |
35f56f96 | 1623 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1624 | { |
35f56f96 | 1625 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 1626 | { |
35f56f96 | 1627 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
1628 | break; |
1629 | } | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | signal (SIGWINCH, window_change_signal); | |
1634 | errno = old_errno; | |
1635 | } | |
1636 | #endif /* SIGWINCH */ | |
1637 | ||
1638 | ||
502b9b64 | 1639 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
1640 | |
1641 | do_pending_window_change () | |
1642 | { | |
1643 | /* If window_change_signal should have run before, run it now. */ | |
1644 | while (delayed_size_change) | |
1645 | { | |
35f56f96 | 1646 | Lisp_Object tail, frame; |
4588ec20 JB |
1647 | |
1648 | delayed_size_change = 0; | |
1649 | ||
35f56f96 | 1650 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1651 | { |
35f56f96 JB |
1652 | FRAME_PTR f = XFRAME (frame); |
1653 | ||
502b9b64 JB |
1654 | int height = FRAME_NEW_HEIGHT (f); |
1655 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 1656 | |
502b9b64 JB |
1657 | FRAME_NEW_HEIGHT (f) = 0; |
1658 | FRAME_NEW_WIDTH (f) = 0; | |
4588ec20 JB |
1659 | |
1660 | if (height != 0) | |
b6a65ac2 | 1661 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
1662 | } |
1663 | } | |
1664 | } | |
1665 | ||
1666 | ||
502b9b64 | 1667 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 1668 | indicate no change is to take place. |
4588ec20 | 1669 | |
b6a65ac2 JB |
1670 | If DELAY is non-zero, then assume we're being called from a signal |
1671 | handler, and queue the change for later - perhaps the next | |
1672 | redisplay. Since this tries to resize windows, we can't call it | |
1673 | from a signal handler. */ | |
1674 | ||
1675 | change_frame_size (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 1676 | register FRAME_PTR frame; |
b6a65ac2 | 1677 | int newheight, newwidth, pretend; |
4588ec20 JB |
1678 | { |
1679 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 1680 | if (delay) |
4588ec20 | 1681 | { |
b6a65ac2 | 1682 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 1683 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
1684 | delayed_size_change = 1; |
1685 | return; | |
1686 | } | |
1687 | ||
502b9b64 JB |
1688 | /* This size-change overrides any pending one for this frame. */ |
1689 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
1690 | FRAME_NEW_WIDTH (frame) = 0; |
1691 | ||
1692 | /* If an arguments is zero, set it to the current value. */ | |
1693 | newheight || (newheight = FRAME_HEIGHT (frame)); | |
1694 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 1695 | |
b6a65ac2 JB |
1696 | /* Round up to the smallest acceptable size. */ |
1697 | check_frame_size (frame, &newheight, &newwidth); | |
1698 | ||
1699 | /* If we're not changing the frame size, quit now. */ | |
1700 | if (newheight == FRAME_HEIGHT (frame) | |
1701 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
1702 | return; |
1703 | ||
b6a65ac2 | 1704 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 1705 | { |
b6a65ac2 | 1706 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 1707 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 1708 | { |
502b9b64 JB |
1709 | /* Frame has both root and minibuffer. */ |
1710 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 1711 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
502b9b64 | 1712 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
b6a65ac2 | 1713 | = newheight - 1; |
502b9b64 | 1714 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
1715 | } |
1716 | else | |
502b9b64 | 1717 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
1718 | set_window_height (FRAME_ROOT_WINDOW (frame), |
1719 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
1720 | |
1721 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
1722 | FrameRows = newheight; | |
4588ec20 JB |
1723 | |
1724 | #if 0 | |
502b9b64 | 1725 | if (frame->output_method == output_termcap) |
4588ec20 | 1726 | { |
b6a65ac2 | 1727 | frame_height = newheight; |
4588ec20 | 1728 | if (!pretend) |
b6a65ac2 | 1729 | FrameRows = newheight; |
4588ec20 JB |
1730 | } |
1731 | #endif | |
1732 | } | |
1733 | ||
b6a65ac2 | 1734 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 1735 | { |
502b9b64 | 1736 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 1737 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 1738 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 1739 | |
b6a65ac2 | 1740 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 1741 | FrameCols = newwidth; |
4588ec20 | 1742 | #if 0 |
502b9b64 | 1743 | if (frame->output_method == output_termcap) |
4588ec20 | 1744 | { |
502b9b64 | 1745 | frame_width = newwidth; |
4588ec20 | 1746 | if (!pretend) |
502b9b64 | 1747 | FrameCols = newwidth; |
4588ec20 JB |
1748 | } |
1749 | #endif | |
1750 | } | |
1751 | ||
b6a65ac2 JB |
1752 | FRAME_HEIGHT (frame) = newheight; |
1753 | FRAME_WIDTH (frame) = newwidth; | |
1754 | ||
502b9b64 JB |
1755 | remake_frame_glyphs (frame); |
1756 | calculate_costs (frame); | |
4588ec20 JB |
1757 | } |
1758 | \f | |
1759 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1760 | Ssend_string_to_terminal, 1, 1, 0, | |
1761 | "Send STRING to the terminal without alteration.\n\ | |
1762 | Control characters in STRING will have terminal-dependent effects.") | |
1763 | (str) | |
1764 | Lisp_Object str; | |
1765 | { | |
1766 | CHECK_STRING (str, 0); | |
1767 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1768 | fflush (stdout); | |
1769 | if (termscript) | |
1770 | { | |
1771 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1772 | fflush (termscript); | |
1773 | } | |
1774 | return Qnil; | |
1775 | } | |
1776 | ||
1777 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1778 | "Beep, or flash the screen.\n\ | |
1779 | Also, unless an argument is given,\n\ | |
1780 | terminate any keyboard macro currently executing.") | |
1781 | (arg) | |
1782 | Lisp_Object arg; | |
1783 | { | |
efb859b4 | 1784 | if (!NILP (arg)) |
4588ec20 | 1785 | { |
7fa788da RS |
1786 | if (noninteractive) |
1787 | putchar (07); | |
1788 | else | |
1789 | ring_bell (); | |
4588ec20 JB |
1790 | fflush (stdout); |
1791 | } | |
1792 | else | |
1793 | bitch_at_user (); | |
1794 | ||
1795 | return Qnil; | |
1796 | } | |
1797 | ||
1798 | bitch_at_user () | |
1799 | { | |
1800 | if (noninteractive) | |
1801 | putchar (07); | |
1802 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1803 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1804 | else | |
1805 | ring_bell (); | |
1806 | fflush (stdout); | |
1807 | } | |
1808 | ||
1809 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 | 1810 | "Pause, without updating display, for SECONDS seconds.\n\ |
b07646f5 JB |
1811 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
1812 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
1813 | additional wait period, in milliseconds; this may be useful if your\n\ | |
1814 | Emacs was built without floating point support.\n\ | |
1815 | \(Not all operating systems support waiting for a fraction of a second.)") | |
767229f8 JB |
1816 | (seconds, milliseconds) |
1817 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 1818 | { |
767229f8 | 1819 | int sec, usec; |
4588ec20 | 1820 | |
767229f8 JB |
1821 | if (NILP (milliseconds)) |
1822 | XSET (milliseconds, Lisp_Int, 0); | |
1823 | else | |
1824 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
1825 | usec = XINT (milliseconds) * 1000; |
1826 | ||
1827 | #ifdef LISP_FLOAT_TYPE | |
1828 | { | |
1829 | double duration = extract_float (seconds); | |
1830 | sec = (int) duration; | |
1831 | usec += (duration - sec) * 1000000; | |
1832 | } | |
1833 | #else | |
1834 | CHECK_NUMBER (seconds, 0); | |
1835 | sec = XINT (seconds); | |
1836 | #endif | |
4588ec20 | 1837 | |
a41f8bed | 1838 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
1839 | if (sec == 0 && usec != 0) |
1840 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 1841 | #endif |
767229f8 JB |
1842 | |
1843 | /* Assure that 0 <= usec < 1000000. */ | |
1844 | if (usec < 0) | |
1845 | { | |
1846 | /* We can't rely on the rounding being correct if user is negative. */ | |
1847 | if (-1000000 < usec) | |
1848 | sec--, usec += 1000000; | |
1849 | else | |
1850 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 1851 | } |
767229f8 JB |
1852 | else |
1853 | sec += usec / 1000000, usec %= 1000000; | |
1854 | ||
92723877 | 1855 | if (sec < 0) |
767229f8 | 1856 | return Qnil; |
4588ec20 | 1857 | |
f76475ad JB |
1858 | { |
1859 | Lisp_Object zero; | |
1860 | ||
1861 | XFASTINT (zero) = 0; | |
1862 | wait_reading_process_input (sec, usec, zero, 0); | |
1863 | } | |
d1af74e9 | 1864 | |
767229f8 JB |
1865 | /* We should always have wait_reading_process_input; we have a dummy |
1866 | implementation for systems which don't support subprocesses. */ | |
1867 | #if 0 | |
1868 | /* No wait_reading_process_input */ | |
4588ec20 JB |
1869 | immediate_quit = 1; |
1870 | QUIT; | |
1871 | ||
1872 | #ifdef VMS | |
1873 | sys_sleep (sec); | |
1874 | #else /* not VMS */ | |
1875 | /* The reason this is done this way | |
1876 | (rather than defined (H_S) && defined (H_T)) | |
1877 | is because the VMS preprocessor doesn't grok `defined' */ | |
1878 | #ifdef HAVE_SELECT | |
a41f8bed JB |
1879 | EMACS_GET_TIME (end_time); |
1880 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 1881 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 1882 | |
4588ec20 JB |
1883 | while (1) |
1884 | { | |
a41f8bed JB |
1885 | EMACS_GET_TIME (timeout); |
1886 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1887 | if (EMACS_TIME_NEG_P (timeout) | |
1888 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
1889 | break; |
1890 | } | |
4588ec20 JB |
1891 | #else /* not HAVE_SELECT */ |
1892 | sleep (sec); | |
1893 | #endif /* HAVE_SELECT */ | |
1894 | #endif /* not VMS */ | |
1895 | ||
1896 | immediate_quit = 0; | |
1897 | #endif /* no subprocesses */ | |
1898 | ||
1899 | return Qnil; | |
1900 | } | |
1901 | ||
f76475ad JB |
1902 | /* This is just like wait_reading_process_input, except that |
1903 | it does the redisplay. | |
1904 | ||
1905 | It's also just like Fsit_for, except that it can be used for | |
1906 | waiting for input as well. */ | |
4588ec20 | 1907 | |
f76475ad JB |
1908 | Lisp_Object |
1909 | sit_for (sec, usec, reading, display) | |
1910 | int sec, usec, reading, display; | |
1911 | { | |
1912 | Lisp_Object read_kbd; | |
4588ec20 JB |
1913 | |
1914 | if (detect_input_pending ()) | |
1915 | return Qnil; | |
4588ec20 | 1916 | |
f76475ad JB |
1917 | if (display) |
1918 | redisplay_preserve_echo_area (); | |
4588ec20 | 1919 | |
dfdb645c JB |
1920 | if (sec == 0 && usec == 0) |
1921 | return Qt; | |
1922 | ||
4588ec20 | 1923 | #ifdef SIGIO |
8fc798e9 | 1924 | gobble_input (0); |
f76475ad JB |
1925 | #endif |
1926 | ||
1927 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
1928 | wait_reading_process_input (sec, usec, read_kbd, display); | |
1929 | ||
d1af74e9 | 1930 | |
500ab754 JB |
1931 | /* wait_reading_process_input should always be available now; it is |
1932 | simulated in a simple way on systems that don't support | |
1933 | subprocesses. */ | |
1934 | #if 0 | |
1935 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
1936 | immediate_quit = 1; |
1937 | QUIT; | |
1938 | ||
1939 | waitchannels = 1; | |
1940 | #ifdef VMS | |
f76475ad | 1941 | input_wait_timeout (XINT (arg)); |
4588ec20 | 1942 | #else /* not VMS */ |
d1af74e9 JB |
1943 | #ifndef HAVE_TIMEVAL |
1944 | timeout_sec = sec; | |
1945 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
1946 | #else /* HAVE_TIMEVAL */ | |
1947 | timeout.tv_sec = sec; | |
1948 | timeout.tv_usec = usec; | |
4588ec20 | 1949 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 1950 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
1951 | #endif /* not VMS */ |
1952 | ||
1953 | immediate_quit = 0; | |
d1af74e9 | 1954 | #endif |
4588ec20 JB |
1955 | |
1956 | return detect_input_pending () ? Qnil : Qt; | |
1957 | } | |
1958 | ||
f76475ad | 1959 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 | 1960 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
b07646f5 JB |
1961 | SECONDS may be a floating-point value, meaning that you can wait for a\n\ |
1962 | fraction of a second. Optional second arg MILLISECONDS specifies an\n\ | |
1963 | additional wait period, in milliseconds; this may be useful if your\n\ | |
1964 | Emacs was built without floating point support.\n\ | |
1965 | \(Not all operating systems support waiting for a fraction of a second.)\n\ | |
f76475ad JB |
1966 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
1967 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
1968 | if input is available before it starts.\n\ | |
1969 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
1970 | (seconds, milliseconds, nodisp) |
1971 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 1972 | { |
767229f8 | 1973 | int sec, usec; |
f76475ad | 1974 | |
767229f8 JB |
1975 | if (NILP (milliseconds)) |
1976 | XSET (milliseconds, Lisp_Int, 0); | |
1977 | else | |
1978 | CHECK_NUMBER (milliseconds, 1); | |
b07646f5 JB |
1979 | usec = XINT (milliseconds) * 1000; |
1980 | ||
1981 | #ifdef LISP_FLOAT_TYPE | |
1982 | { | |
1983 | double duration = extract_float (seconds); | |
1984 | sec = (int) duration; | |
1985 | usec += (duration - sec) * 1000000; | |
1986 | } | |
1987 | #else | |
1988 | CHECK_NUMBER (seconds, 0); | |
1989 | sec = XINT (seconds); | |
1990 | #endif | |
f76475ad | 1991 | |
f76475ad | 1992 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
1993 | if (usec != 0 && sec == 0) |
1994 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 1995 | #endif |
f76475ad JB |
1996 | |
1997 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
1998 | } | |
4588ec20 JB |
1999 | \f |
2000 | char *terminal_type; | |
2001 | ||
2002 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
2003 | /* Determine terminal type and set terminal_driver */ | |
2004 | /* Then invoke its decoding routine to set up variables | |
2005 | in the terminal package */ | |
2006 | ||
2007 | init_display () | |
2008 | { | |
2009 | #ifdef HAVE_X_WINDOWS | |
2010 | extern int display_arg; | |
2011 | #endif | |
2012 | ||
2013 | meta_key = 0; | |
2014 | inverse_video = 0; | |
2015 | cursor_in_echo_area = 0; | |
2016 | terminal_type = (char *) 0; | |
2017 | ||
1315c181 JB |
2018 | /* Now is the time to initialize this; it's used by init_sys_modes |
2019 | during startup. */ | |
2020 | Vwindow_system = Qnil; | |
4588ec20 | 2021 | |
1315c181 JB |
2022 | /* If the user wants to use a window system, we shouldn't bother |
2023 | initializing the terminal. This is especially important when the | |
2024 | terminal is so dumb that emacs gives up before and doesn't bother | |
2025 | using the window system. | |
4588ec20 | 2026 | |
1315c181 JB |
2027 | If the DISPLAY environment variable is set, try to use X, and die |
2028 | with an error message if that doesn't work. */ | |
4588ec20 JB |
2029 | |
2030 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
2031 | if (! display_arg) |
2032 | { | |
2033 | #ifdef VMS | |
5de9f849 | 2034 | display_arg = (getenv ("DECW$DISPLAY") != 0); |
d460af17 | 2035 | #else |
5de9f849 | 2036 | display_arg = (getenv ("DISPLAY") != 0); |
d460af17 | 2037 | #endif |
f040093a | 2038 | } |
d460af17 JB |
2039 | |
2040 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2041 | { |
2042 | Vwindow_system = intern ("x"); | |
2043 | #ifdef HAVE_X11 | |
2044 | Vwindow_system_version = make_number (11); | |
2045 | #else | |
2046 | Vwindow_system_version = make_number (10); | |
2047 | #endif | |
2048 | return; | |
2049 | } | |
2050 | #endif /* HAVE_X_WINDOWS */ | |
2051 | ||
2052 | /* If no window system has been specified, try to use the terminal. */ | |
2053 | if (! isatty (0)) | |
2054 | { | |
2055 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2056 | exit (1); | |
2057 | } | |
2058 | ||
2059 | /* Look at the TERM variable */ | |
2060 | terminal_type = (char *) getenv ("TERM"); | |
2061 | if (!terminal_type) | |
2062 | { | |
2063 | #ifdef VMS | |
2064 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2065 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2066 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2067 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2068 | #else | |
2069 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2070 | #endif | |
2071 | exit (1); | |
2072 | } | |
2073 | ||
2074 | #ifdef VMS | |
2075 | /* VMS DCL tends to upcase things, so downcase term type. | |
2076 | Hardly any uppercase letters in terminal types; should be none. */ | |
2077 | { | |
2078 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2079 | char *p; | |
2080 | ||
2081 | strcpy (new, terminal_type); | |
2082 | ||
2083 | for (p = new; *p; p++) | |
2084 | if (isupper (*p)) | |
2085 | *p = tolower (*p); | |
2086 | ||
2087 | terminal_type = new; | |
2088 | } | |
2089 | #endif | |
2090 | ||
2091 | term_init (terminal_type); | |
2092 | ||
502b9b64 JB |
2093 | remake_frame_glyphs (selected_frame); |
2094 | calculate_costs (selected_frame); | |
4588ec20 JB |
2095 | |
2096 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2097 | FRAME_CURSOR_X (selected_frame) = 0; |
2098 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2099 | |
2100 | #ifdef SIGWINCH | |
2101 | #ifndef CANNOT_DUMP | |
2102 | if (initialized) | |
2103 | #endif /* CANNOT_DUMP */ | |
2104 | signal (SIGWINCH, window_change_signal); | |
2105 | #endif /* SIGWINCH */ | |
2106 | } | |
2107 | \f | |
2108 | syms_of_display () | |
2109 | { | |
502b9b64 JB |
2110 | #ifdef MULTI_FRAME |
2111 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2112 | #endif |
2113 | defsubr (&Sredraw_display); | |
2114 | defsubr (&Sopen_termscript); | |
2115 | defsubr (&Sding); | |
2116 | defsubr (&Ssit_for); | |
2117 | defsubr (&Ssleep_for); | |
2118 | defsubr (&Ssend_string_to_terminal); | |
2119 | ||
2120 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2121 | "The output baud rate of the terminal.\n\ | |
2122 | On most systems, changing this value will affect the amount of padding\n\ | |
2123 | and the other strategic decisions made during redisplay."); | |
2124 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2125 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2126 | This means everything is in inverse video which otherwise would not be."); |
2127 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2128 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2129 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2130 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2131 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2132 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2133 | It is up to you to set this variable if your terminal can do that."); |
2134 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2135 | "A symbol naming the window-system under which Emacs is running\n\ | |
2136 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2137 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2138 | "The version number of the window system in use.\n\ | |
2139 | For X windows, this is 10 or 11."); | |
2140 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2141 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2142 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2143 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2144 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2145 | Each element can be:\n\ | |
2146 | integer: a glyph code which this glyph is an alias for.\n\ | |
2147 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2148 | nil: this glyph mod 256 is char code to output,\n\ | |
2149 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2150 | Vglyph_table = Qnil; | |
2151 | ||
2152 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2153 | "Display table to use for buffers that specify none.\n\ | |
2154 | See `buffer-display-table' for more information."); | |
2155 | Vstandard_display_table = Qnil; | |
2156 | ||
2157 | /* Initialize `window-system', unless init_display already decided it. */ | |
2158 | #ifdef CANNOT_DUMP | |
2159 | if (noninteractive) | |
2160 | #endif | |
2161 | { | |
2162 | Vwindow_system = Qnil; | |
2163 | Vwindow_system_version = Qnil; | |
2164 | } | |
2165 | } | |
2166 |