Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
fa61c701 JB |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1990, |
3 | 1992, 1993 Free Software Foundation, Inc. | |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
fa61c701 | 9 | the Free Software Foundation; either version 2, or (at your option) |
4588ec20 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
22 | #include <signal.h> | |
23 | ||
24 | #include "config.h" | |
25 | #include <stdio.h> | |
26 | #include <ctype.h> | |
27 | ||
4588ec20 JB |
28 | #include "termchar.h" |
29 | #include "termopts.h" | |
3be08bea | 30 | #include "termhooks.h" |
4588ec20 JB |
31 | #include "cm.h" |
32 | #include "lisp.h" | |
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" | |
40 | ||
648fa17d | 41 | #include "systty.h" |
a41f8bed JB |
42 | #include "systime.h" |
43 | ||
4588ec20 JB |
44 | #ifdef HAVE_X_WINDOWS |
45 | #include "xterm.h" | |
46 | #endif /* HAVE_X_WINDOWS */ | |
47 | ||
b2e52194 JB |
48 | extern char *getenv (); |
49 | ||
4588ec20 JB |
50 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
51 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
52 | ||
53 | #ifndef PENDING_OUTPUT_COUNT | |
54 | /* Get number of chars of output now in the buffer of a stdio stream. | |
55 | This ought to be built in in stdio, but it isn't. | |
56 | Some s- files override this because their stdio internals differ. */ | |
57 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) | |
58 | #endif | |
59 | ||
a41f8bed | 60 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 61 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 62 | |
502b9b64 | 63 | int frame_garbaged; |
4588ec20 JB |
64 | |
65 | /* Nonzero means last display completed. Zero means it was preempted. */ | |
66 | ||
67 | int display_completed; | |
68 | ||
69 | /* Lisp variable visible-bell; enables use of screen-flash | |
70 | instead of audible bell. */ | |
71 | ||
72 | int visible_bell; | |
73 | ||
502b9b64 | 74 | /* Invert the color of the whole frame, at a low level. */ |
4588ec20 JB |
75 | |
76 | int inverse_video; | |
77 | ||
78 | /* Line speed of the terminal. */ | |
79 | ||
80 | int baud_rate; | |
81 | ||
82 | /* nil or a symbol naming the window system under which emacs is | |
83 | running ('x is the only current possibility). */ | |
84 | ||
85 | Lisp_Object Vwindow_system; | |
86 | ||
87 | /* Version number of X windows: 10, 11 or nil. */ | |
88 | Lisp_Object Vwindow_system_version; | |
89 | ||
90 | /* Vector of glyph definitions. Indexed by glyph number, | |
91 | the contents are a string which is how to output the glyph. | |
92 | ||
93 | If Vglyph_table is nil, a glyph is output by using its low 8 bits | |
94 | as a character code. */ | |
95 | ||
96 | Lisp_Object Vglyph_table; | |
97 | ||
98 | /* Display table to use for vectors that don't specify their own. */ | |
99 | ||
100 | Lisp_Object Vstandard_display_table; | |
101 | ||
102 | /* Nonzero means reading single-character input with prompt | |
1113d9db JB |
103 | so put cursor on minibuffer after the prompt. |
104 | positive means at end of text in echo area; | |
105 | negative means at beginning of line. */ | |
4588ec20 JB |
106 | int cursor_in_echo_area; |
107 | \f | |
502b9b64 JB |
108 | /* The currently selected frame. |
109 | In a single-frame version, this variable always remains 0. */ | |
4588ec20 | 110 | |
502b9b64 | 111 | FRAME_PTR selected_frame; |
4588ec20 | 112 | |
502b9b64 JB |
113 | /* A frame which is not just a minibuffer, or 0 if there are no such |
114 | frames. This is usually the most recent such frame that was | |
115 | selected. In a single-frame version, this variable always remains 0. */ | |
116 | FRAME_PTR last_nonminibuf_frame; | |
e5d77022 | 117 | |
502b9b64 | 118 | /* In a single-frame version, the information that would otherwise |
190721ac JB |
119 | exist inside frame objects lives in the following structure instead. |
120 | ||
121 | NOTE: the_only_frame is not checked for garbage collection; don't | |
122 | store collectable objects in any of its fields! | |
123 | ||
124 | You're not/The only frame in town/... */ | |
4588ec20 | 125 | |
502b9b64 JB |
126 | #ifndef MULTI_FRAME |
127 | struct frame the_only_frame; | |
e5d77022 | 128 | #endif |
4588ec20 JB |
129 | |
130 | /* This is a vector, made larger whenever it isn't large enough, | |
502b9b64 JB |
131 | which is used inside `update_frame' to hold the old contents |
132 | of the FRAME_PHYS_LINES of the frame being updated. */ | |
133 | struct frame_glyphs **ophys_lines; | |
4588ec20 JB |
134 | /* Length of vector currently allocated. */ |
135 | int ophys_lines_length; | |
136 | ||
137 | FILE *termscript; /* Stdio stream being used for copy of all output. */ | |
138 | ||
139 | struct cm Wcm; /* Structure for info on cursor positioning */ | |
140 | ||
141 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
142 | ||
4588ec20 | 143 | int delayed_size_change; /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 144 | \f |
502b9b64 | 145 | #ifdef MULTI_FRAME |
4588ec20 | 146 | |
502b9b64 JB |
147 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
148 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
149 | (frame) | |
150 | Lisp_Object frame; | |
4588ec20 | 151 | { |
502b9b64 | 152 | FRAME_PTR f; |
4588ec20 | 153 | |
502b9b64 JB |
154 | CHECK_LIVE_FRAME (frame, 0); |
155 | f = XFRAME (frame); | |
156 | update_begin (f); | |
4588ec20 | 157 | /* set_terminal_modes (); */ |
502b9b64 | 158 | clear_frame (); |
b6a65ac2 | 159 | clear_frame_records (f); |
502b9b64 | 160 | update_end (f); |
4588ec20 | 161 | fflush (stdout); |
4588ec20 JB |
162 | windows_or_buffers_changed++; |
163 | /* Mark all windows as INaccurate, | |
164 | so that every window will have its redisplay done. */ | |
502b9b64 JB |
165 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); |
166 | f->garbaged = 0; | |
4588ec20 JB |
167 | return Qnil; |
168 | } | |
169 | ||
502b9b64 JB |
170 | redraw_frame (f) |
171 | FRAME_PTR f; | |
4588ec20 | 172 | { |
502b9b64 JB |
173 | Lisp_Object frame; |
174 | XSET (frame, Lisp_Frame, f); | |
175 | Fredraw_frame (frame); | |
4588ec20 JB |
176 | } |
177 | ||
35f56f96 | 178 | #else |
4588ec20 | 179 | |
35f56f96 JB |
180 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, "", |
181 | "Clear frame FRAME and output again what is supposed to appear on it.") | |
182 | (frame) | |
183 | Lisp_Object frame; | |
4588ec20 JB |
184 | { |
185 | update_begin (0); | |
186 | set_terminal_modes (); | |
502b9b64 | 187 | clear_frame (); |
4588ec20 JB |
188 | update_end (0); |
189 | fflush (stdout); | |
502b9b64 | 190 | clear_frame_records (0); |
4588ec20 JB |
191 | windows_or_buffers_changed++; |
192 | /* Mark all windows as INaccurate, | |
193 | so that every window will have its redisplay done. */ | |
b5c685f4 | 194 | mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0); |
4588ec20 JB |
195 | return Qnil; |
196 | } | |
197 | ||
35f56f96 JB |
198 | #endif |
199 | ||
200 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
201 | "Clear and redisplay all visible frames.") | |
202 | () | |
203 | { | |
204 | Lisp_Object tail, frame; | |
205 | ||
206 | FOR_EACH_FRAME (tail, frame) | |
207 | /* If we simply redrew all visible frames, whether or not they | |
208 | were garbaged, then this would make all frames clear and | |
209 | nredraw whenever a new frame is created or an existing frame | |
210 | is de-iconified; those events set the global frame_garbaged | |
211 | flag, to which redisplay responds by calling this function. | |
212 | ||
213 | This used to redraw all visible frames; the only advantage of | |
214 | that approach is that if a frame changes from invisible to | |
215 | visible without setting its garbaged flag, it still gets | |
216 | redisplayed. But that should never happen; since invisible | |
217 | frames are not updated, they should always be marked as | |
218 | garbaged when they become visible again. If that doesn't | |
219 | happen, it's a bug in the visibility code, not a bug here. */ | |
220 | if (FRAME_VISIBLE_P (XFRAME (frame)) | |
221 | && FRAME_GARBAGED_P (XFRAME (frame))) | |
222 | Fredraw_frame (frame); | |
223 | ||
224 | return Qnil; | |
225 | } | |
226 | ||
4588ec20 | 227 | \f |
502b9b64 JB |
228 | static struct frame_glyphs * |
229 | make_frame_glyphs (frame, empty) | |
230 | register FRAME_PTR frame; | |
4588ec20 JB |
231 | int empty; |
232 | { | |
233 | register int i; | |
502b9b64 JB |
234 | register width = FRAME_WIDTH (frame); |
235 | register height = FRAME_HEIGHT (frame); | |
236 | register struct frame_glyphs *new = | |
237 | (struct frame_glyphs *) xmalloc (sizeof (struct frame_glyphs)); | |
4588ec20 | 238 | |
502b9b64 | 239 | SET_GLYPHS_FRAME (new, frame); |
4588ec20 JB |
240 | new->height = height; |
241 | new->width = width; | |
242 | new->used = (int *) xmalloc (height * sizeof (int)); | |
243 | new->glyphs = (GLYPH **) xmalloc (height * sizeof (GLYPH *)); | |
244 | new->highlight = (char *) xmalloc (height * sizeof (char)); | |
245 | new->enable = (char *) xmalloc (height * sizeof (char)); | |
246 | bzero (new->enable, height * sizeof (char)); | |
247 | new->bufp = (int *) xmalloc (height * sizeof (int)); | |
248 | ||
249 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 250 | if (FRAME_X_P (frame)) |
4588ec20 | 251 | { |
4588ec20 JB |
252 | new->top_left_x = (short *) xmalloc (height * sizeof (short)); |
253 | new->top_left_y = (short *) xmalloc (height * sizeof (short)); | |
254 | new->pix_width = (short *) xmalloc (height * sizeof (short)); | |
255 | new->pix_height = (short *) xmalloc (height * sizeof (short)); | |
448fd7c0 | 256 | new->max_ascent = (short *) xmalloc (height * sizeof (short)); |
4588ec20 JB |
257 | } |
258 | #endif | |
259 | ||
260 | if (empty) | |
261 | { | |
262 | /* Make the buffer used by decode_mode_spec. This buffer is also | |
502b9b64 | 263 | used as temporary storage when updating the frame. See scroll.c. */ |
4588ec20 JB |
264 | unsigned int total_glyphs = (width + 2) * sizeof (GLYPH); |
265 | ||
266 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
267 | bzero (new->total_contents, total_glyphs); | |
268 | } | |
269 | else | |
270 | { | |
271 | unsigned int total_glyphs = height * (width + 2) * sizeof (GLYPH); | |
272 | ||
273 | new->total_contents = (GLYPH *) xmalloc (total_glyphs); | |
274 | bzero (new->total_contents, total_glyphs); | |
275 | for (i = 0; i < height; i++) | |
276 | new->glyphs[i] = new->total_contents + i * (width + 2) + 1; | |
277 | } | |
278 | ||
279 | return new; | |
280 | } | |
281 | ||
282 | static void | |
502b9b64 JB |
283 | free_frame_glyphs (frame, glyphs) |
284 | FRAME_PTR frame; | |
285 | struct frame_glyphs *glyphs; | |
4588ec20 JB |
286 | { |
287 | if (glyphs->total_contents) | |
288 | free (glyphs->total_contents); | |
289 | ||
290 | free (glyphs->used); | |
291 | free (glyphs->glyphs); | |
292 | free (glyphs->highlight); | |
293 | free (glyphs->enable); | |
294 | free (glyphs->bufp); | |
295 | ||
296 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 297 | if (FRAME_X_P (frame)) |
4588ec20 | 298 | { |
4588ec20 JB |
299 | free (glyphs->top_left_x); |
300 | free (glyphs->top_left_y); | |
301 | free (glyphs->pix_width); | |
302 | free (glyphs->pix_height); | |
448fd7c0 | 303 | free (glyphs->max_ascent); |
4588ec20 JB |
304 | } |
305 | #endif | |
306 | ||
307 | free (glyphs); | |
308 | } | |
309 | ||
310 | static void | |
502b9b64 JB |
311 | remake_frame_glyphs (frame) |
312 | FRAME_PTR frame; | |
4588ec20 | 313 | { |
502b9b64 JB |
314 | if (FRAME_CURRENT_GLYPHS (frame)) |
315 | free_frame_glyphs (frame, FRAME_CURRENT_GLYPHS (frame)); | |
316 | if (FRAME_DESIRED_GLYPHS (frame)) | |
317 | free_frame_glyphs (frame, FRAME_DESIRED_GLYPHS (frame)); | |
318 | if (FRAME_TEMP_GLYPHS (frame)) | |
319 | free_frame_glyphs (frame, FRAME_TEMP_GLYPHS (frame)); | |
320 | ||
321 | if (FRAME_MESSAGE_BUF (frame)) | |
832a0726 JB |
322 | { |
323 | /* Reallocate the frame's message buffer; remember that | |
324 | echo_area_glyphs may be pointing here. */ | |
325 | char *old_message_buf = FRAME_MESSAGE_BUF (frame); | |
326 | ||
327 | FRAME_MESSAGE_BUF (frame) | |
328 | = (char *) xrealloc (FRAME_MESSAGE_BUF (frame), | |
329 | FRAME_WIDTH (frame) + 1); | |
330 | ||
331 | if (echo_area_glyphs == old_message_buf) | |
332 | echo_area_glyphs = FRAME_MESSAGE_BUF (frame); | |
333 | if (previous_echo_glyphs == old_message_buf) | |
334 | previous_echo_glyphs = FRAME_MESSAGE_BUF (frame); | |
335 | } | |
4588ec20 | 336 | else |
502b9b64 JB |
337 | FRAME_MESSAGE_BUF (frame) |
338 | = (char *) xmalloc (FRAME_WIDTH (frame) + 1); | |
4588ec20 | 339 | |
502b9b64 JB |
340 | FRAME_CURRENT_GLYPHS (frame) = make_frame_glyphs (frame, 0); |
341 | FRAME_DESIRED_GLYPHS (frame) = make_frame_glyphs (frame, 0); | |
342 | FRAME_TEMP_GLYPHS (frame) = make_frame_glyphs (frame, 1); | |
343 | SET_FRAME_GARBAGED (frame); | |
4588ec20 JB |
344 | } |
345 | \f | |
502b9b64 | 346 | /* Return the hash code of contents of line VPOS in frame-matrix M. */ |
4588ec20 JB |
347 | |
348 | static int | |
349 | line_hash_code (m, vpos) | |
502b9b64 | 350 | register struct frame_glyphs *m; |
4588ec20 JB |
351 | int vpos; |
352 | { | |
353 | register GLYPH *body, *end; | |
354 | register int h = 0; | |
355 | ||
356 | if (!m->enable[vpos]) | |
357 | return 0; | |
358 | ||
94aa5d2d | 359 | /* Give all highlighted lines the same hash code |
4588ec20 JB |
360 | so as to encourage scrolling to leave them in place. */ |
361 | if (m->highlight[vpos]) | |
362 | return -1; | |
363 | ||
364 | body = m->glyphs[vpos]; | |
365 | ||
366 | if (must_write_spaces) | |
367 | while (1) | |
368 | { | |
369 | GLYPH g = *body++; | |
370 | ||
371 | if (g == 0) | |
372 | break; | |
373 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g - SPACEGLYPH; | |
374 | } | |
375 | else | |
376 | while (1) | |
377 | { | |
378 | GLYPH g = *body++; | |
379 | ||
380 | if (g == 0) | |
381 | break; | |
382 | h = (((h << 4) + (h >> 24)) & 0x0fffffff) + g; | |
383 | } | |
384 | ||
385 | if (h) | |
386 | return h; | |
387 | return 1; | |
388 | } | |
389 | ||
390 | /* Return number of characters in line in M at vpos VPOS, | |
391 | except don't count leading and trailing spaces | |
392 | unless the terminal requires those to be explicitly output. */ | |
393 | ||
394 | static unsigned int | |
395 | line_draw_cost (m, vpos) | |
502b9b64 | 396 | struct frame_glyphs *m; |
4588ec20 JB |
397 | int vpos; |
398 | { | |
399 | register GLYPH *beg = m->glyphs[vpos]; | |
400 | register GLYPH *end = m->glyphs[vpos] + m->used[vpos]; | |
401 | register int i; | |
402 | register int tlen = GLYPH_TABLE_LENGTH; | |
403 | register Lisp_Object *tbase = GLYPH_TABLE_BASE; | |
404 | ||
405 | /* Ignore trailing and leading spaces if we can. */ | |
406 | if (!must_write_spaces) | |
407 | { | |
408 | while ((end != beg) && (*end == SPACEGLYPH)) | |
409 | --end; | |
410 | if (end == beg) | |
411 | return (0); /* All blank line. */ | |
412 | ||
413 | while (*beg == SPACEGLYPH) | |
414 | ++beg; | |
415 | } | |
416 | ||
417 | /* If we don't have a glyph-table, each glyph is one character, | |
418 | so return the number of glyphs. */ | |
419 | if (tbase == 0) | |
420 | return end - beg; | |
421 | ||
422 | /* Otherwise, scan the glyphs and accumulate their total size in I. */ | |
423 | i = 0; | |
424 | while ((beg <= end) && *beg) | |
425 | { | |
426 | register GLYPH g = *beg++; | |
427 | ||
428 | if (GLYPH_SIMPLE_P (tbase, tlen, g)) | |
429 | i += 1; | |
430 | else | |
431 | i += GLYPH_LENGTH (tbase, g); | |
432 | } | |
433 | return i; | |
434 | } | |
435 | \f | |
436 | /* The functions on this page are the interface from xdisp.c to redisplay. | |
437 | ||
438 | The only other interface into redisplay is through setting | |
502b9b64 JB |
439 | FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame) |
440 | and SET_FRAME_GARBAGED (frame). */ | |
4588ec20 JB |
441 | |
442 | /* cancel_line eliminates any request to display a line at position `vpos' */ | |
443 | ||
502b9b64 | 444 | cancel_line (vpos, frame) |
4588ec20 | 445 | int vpos; |
502b9b64 | 446 | register FRAME_PTR frame; |
4588ec20 | 447 | { |
502b9b64 | 448 | FRAME_DESIRED_GLYPHS (frame)->enable[vpos] = 0; |
4588ec20 JB |
449 | } |
450 | ||
502b9b64 JB |
451 | clear_frame_records (frame) |
452 | register FRAME_PTR frame; | |
4588ec20 | 453 | { |
502b9b64 | 454 | bzero (FRAME_CURRENT_GLYPHS (frame)->enable, FRAME_HEIGHT (frame)); |
4588ec20 JB |
455 | } |
456 | ||
457 | /* Prepare to display on line VPOS starting at HPOS within it. */ | |
458 | ||
459 | void | |
502b9b64 JB |
460 | get_display_line (frame, vpos, hpos) |
461 | register FRAME_PTR frame; | |
4588ec20 JB |
462 | int vpos; |
463 | register int hpos; | |
464 | { | |
502b9b64 JB |
465 | register struct frame_glyphs *glyphs; |
466 | register struct frame_glyphs *desired_glyphs = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
467 | register GLYPH *p; |
468 | ||
7c3c72ec | 469 | if (vpos < 0) |
4588ec20 JB |
470 | abort (); |
471 | ||
472 | if ((desired_glyphs->enable[vpos]) && desired_glyphs->used[vpos] > hpos) | |
473 | abort (); | |
474 | ||
475 | if (! desired_glyphs->enable[vpos]) | |
476 | { | |
477 | desired_glyphs->used[vpos] = 0; | |
478 | desired_glyphs->highlight[vpos] = 0; | |
479 | desired_glyphs->enable[vpos] = 1; | |
480 | } | |
481 | ||
482 | if (hpos > desired_glyphs->used[vpos]) | |
483 | { | |
484 | GLYPH *g = desired_glyphs->glyphs[vpos] + desired_glyphs->used[vpos]; | |
485 | GLYPH *end = desired_glyphs->glyphs[vpos] + hpos; | |
486 | ||
487 | desired_glyphs->used[vpos] = hpos; | |
488 | while (g != end) | |
489 | *g++ = SPACEGLYPH; | |
490 | } | |
491 | } | |
492 | ||
493 | /* Like bcopy except never gets confused by overlap. */ | |
494 | ||
495 | void | |
496 | safe_bcopy (from, to, size) | |
497 | char *from, *to; | |
498 | int size; | |
499 | { | |
b5c685f4 | 500 | if (size <= 0 || from == to) |
4588ec20 JB |
501 | return; |
502 | ||
b5c685f4 JB |
503 | /* If the source and destination don't overlap, then bcopy can |
504 | handle it. If they do overlap, but the destination is lower in | |
505 | memory than the source, we'll assume bcopy can handle that. */ | |
506 | if (to < from || from + size <= to) | |
507 | bcopy (from, to, size); | |
508 | ||
509 | /* Otherwise, we'll copy from the end. */ | |
510 | else | |
4588ec20 | 511 | { |
b5c685f4 JB |
512 | register char *endf = from + size; |
513 | register char *endt = to + size; | |
4588ec20 JB |
514 | |
515 | /* If TO - FROM is large, then we should break the copy into | |
516 | nonoverlapping chunks of TO - FROM bytes each. However, if | |
517 | TO - FROM is small, then the bcopy function call overhead | |
518 | makes this not worth it. The crossover point could be about | |
b5c685f4 JB |
519 | anywhere. Since I don't think the obvious copy loop is too |
520 | bad, I'm trying to err in its favor. */ | |
4588ec20 JB |
521 | if (to - from < 64) |
522 | { | |
523 | do | |
524 | *--endt = *--endf; | |
525 | while (endf != from); | |
526 | } | |
527 | else | |
528 | { | |
b5c685f4 | 529 | for (;;) |
4588ec20 JB |
530 | { |
531 | endt -= (to - from); | |
532 | endf -= (to - from); | |
533 | ||
b5c685f4 JB |
534 | if (endt < to) |
535 | break; | |
536 | ||
4588ec20 JB |
537 | bcopy (endf, endt, to - from); |
538 | } | |
b5c685f4 JB |
539 | |
540 | /* If SIZE wasn't a multiple of TO - FROM, there will be a | |
4588ec20 JB |
541 | little left over. The amount left over is |
542 | (endt + (to - from)) - to, which is endt - from. */ | |
543 | bcopy (from, to, endt - from); | |
544 | } | |
545 | } | |
4588ec20 JB |
546 | } |
547 | ||
98038dc0 | 548 | /* Rotate a vector of SIZE bytes right, by DISTANCE bytes. |
4588ec20 JB |
549 | DISTANCE may be negative. */ |
550 | ||
551 | static void | |
552 | rotate_vector (vector, size, distance) | |
553 | char *vector; | |
554 | int size; | |
555 | int distance; | |
556 | { | |
557 | char *temp = (char *) alloca (size); | |
558 | ||
559 | if (distance < 0) | |
560 | distance += size; | |
561 | ||
562 | bcopy (vector, temp + distance, size - distance); | |
563 | bcopy (vector + size - distance, temp, distance); | |
564 | bcopy (temp, vector, size); | |
565 | } | |
566 | ||
567 | /* Scroll lines from vpos FROM up to but not including vpos END | |
568 | down by AMOUNT lines (AMOUNT may be negative). | |
569 | Returns nonzero if done, zero if terminal cannot scroll them. */ | |
570 | ||
571 | int | |
502b9b64 JB |
572 | scroll_frame_lines (frame, from, end, amount) |
573 | register FRAME_PTR frame; | |
4588ec20 JB |
574 | int from, end, amount; |
575 | { | |
576 | register int i; | |
502b9b64 JB |
577 | register struct frame_glyphs *current_frame |
578 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
579 | |
580 | if (!line_ins_del_ok) | |
581 | return 0; | |
582 | ||
583 | if (amount == 0) | |
584 | return 1; | |
585 | ||
586 | if (amount > 0) | |
587 | { | |
502b9b64 | 588 | update_begin (frame); |
4588ec20 JB |
589 | set_terminal_window (end + amount); |
590 | if (!scroll_region_ok) | |
591 | ins_del_lines (end, -amount); | |
592 | ins_del_lines (from, amount); | |
593 | set_terminal_window (0); | |
594 | ||
502b9b64 | 595 | rotate_vector (current_frame->glyphs + from, |
4588ec20 JB |
596 | sizeof (GLYPH *) * (end + amount - from), |
597 | amount * sizeof (GLYPH *)); | |
598 | ||
502b9b64 JB |
599 | safe_bcopy (current_frame->used + from, |
600 | current_frame->used + from + amount, | |
601 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 602 | |
502b9b64 JB |
603 | safe_bcopy (current_frame->highlight + from, |
604 | current_frame->highlight + from + amount, | |
605 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 606 | |
502b9b64 JB |
607 | safe_bcopy (current_frame->enable + from, |
608 | current_frame->enable + from + amount, | |
609 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
610 | |
611 | /* Mark the lines made empty by scrolling as enabled, empty and | |
612 | normal video. */ | |
502b9b64 JB |
613 | bzero (current_frame->used + from, |
614 | amount * sizeof current_frame->used[0]); | |
615 | bzero (current_frame->highlight + from, | |
616 | amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
617 | for (i = from; i < from + amount; i++) |
618 | { | |
502b9b64 JB |
619 | current_frame->glyphs[i][0] = '\0'; |
620 | current_frame->enable[i] = 1; | |
4588ec20 JB |
621 | } |
622 | ||
502b9b64 JB |
623 | safe_bcopy (current_frame->bufp + from, |
624 | current_frame->bufp + from + amount, | |
625 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
626 | |
627 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 628 | if (FRAME_X_P (frame)) |
4588ec20 | 629 | { |
502b9b64 JB |
630 | safe_bcopy (current_frame->top_left_x + from, |
631 | current_frame->top_left_x + from + amount, | |
632 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 633 | |
502b9b64 JB |
634 | safe_bcopy (current_frame->top_left_y + from, |
635 | current_frame->top_left_y + from + amount, | |
636 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 637 | |
502b9b64 JB |
638 | safe_bcopy (current_frame->pix_width + from, |
639 | current_frame->pix_width + from + amount, | |
640 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 641 | |
502b9b64 JB |
642 | safe_bcopy (current_frame->pix_height + from, |
643 | current_frame->pix_height + from + amount, | |
644 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
645 | |
646 | safe_bcopy (current_frame->max_ascent + from, | |
647 | current_frame->max_ascent + from + amount, | |
648 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
649 | } |
650 | #endif /* HAVE_X_WINDOWS */ | |
651 | ||
502b9b64 | 652 | update_end (frame); |
4588ec20 JB |
653 | } |
654 | if (amount < 0) | |
655 | { | |
502b9b64 | 656 | update_begin (frame); |
4588ec20 JB |
657 | set_terminal_window (end); |
658 | ins_del_lines (from + amount, amount); | |
659 | if (!scroll_region_ok) | |
660 | ins_del_lines (end + amount, -amount); | |
661 | set_terminal_window (0); | |
662 | ||
502b9b64 | 663 | rotate_vector (current_frame->glyphs + from + amount, |
4588ec20 JB |
664 | sizeof (GLYPH *) * (end - from - amount), |
665 | amount * sizeof (GLYPH *)); | |
666 | ||
502b9b64 JB |
667 | safe_bcopy (current_frame->used + from, |
668 | current_frame->used + from + amount, | |
669 | (end - from) * sizeof current_frame->used[0]); | |
4588ec20 | 670 | |
502b9b64 JB |
671 | safe_bcopy (current_frame->highlight + from, |
672 | current_frame->highlight + from + amount, | |
673 | (end - from) * sizeof current_frame->highlight[0]); | |
4588ec20 | 674 | |
502b9b64 JB |
675 | safe_bcopy (current_frame->enable + from, |
676 | current_frame->enable + from + amount, | |
677 | (end - from) * sizeof current_frame->enable[0]); | |
4588ec20 JB |
678 | |
679 | /* Mark the lines made empty by scrolling as enabled, empty and | |
680 | normal video. */ | |
502b9b64 JB |
681 | bzero (current_frame->used + end + amount, |
682 | - amount * sizeof current_frame->used[0]); | |
683 | bzero (current_frame->highlight + end + amount, | |
684 | - amount * sizeof current_frame->highlight[0]); | |
4588ec20 JB |
685 | for (i = end + amount; i < end; i++) |
686 | { | |
502b9b64 JB |
687 | current_frame->glyphs[i][0] = '\0'; |
688 | current_frame->enable[i] = 1; | |
4588ec20 JB |
689 | } |
690 | ||
502b9b64 JB |
691 | safe_bcopy (current_frame->bufp + from, |
692 | current_frame->bufp + from + amount, | |
693 | (end - from) * sizeof current_frame->bufp[0]); | |
4588ec20 JB |
694 | |
695 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 696 | if (FRAME_X_P (frame)) |
4588ec20 | 697 | { |
502b9b64 JB |
698 | safe_bcopy (current_frame->top_left_x + from, |
699 | current_frame->top_left_x + from + amount, | |
700 | (end - from) * sizeof current_frame->top_left_x[0]); | |
4588ec20 | 701 | |
502b9b64 JB |
702 | safe_bcopy (current_frame->top_left_y + from, |
703 | current_frame->top_left_y + from + amount, | |
704 | (end - from) * sizeof current_frame->top_left_y[0]); | |
4588ec20 | 705 | |
502b9b64 JB |
706 | safe_bcopy (current_frame->pix_width + from, |
707 | current_frame->pix_width + from + amount, | |
708 | (end - from) * sizeof current_frame->pix_width[0]); | |
4588ec20 | 709 | |
502b9b64 JB |
710 | safe_bcopy (current_frame->pix_height + from, |
711 | current_frame->pix_height + from + amount, | |
712 | (end - from) * sizeof current_frame->pix_height[0]); | |
448fd7c0 JA |
713 | |
714 | safe_bcopy (current_frame->max_ascent + from, | |
715 | current_frame->max_ascent + from + amount, | |
716 | (end - from) * sizeof current_frame->max_ascent[0]); | |
4588ec20 JB |
717 | } |
718 | #endif /* HAVE_X_WINDOWS */ | |
719 | ||
502b9b64 | 720 | update_end (frame); |
4588ec20 JB |
721 | } |
722 | return 1; | |
723 | } | |
724 | \f | |
502b9b64 | 725 | /* After updating a window W that isn't the full frame wide, |
4588ec20 | 726 | copy all the columns that W does not occupy |
502b9b64 JB |
727 | into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame) |
728 | so that update_frame will not change those columns. */ | |
4588ec20 JB |
729 | |
730 | preserve_other_columns (w) | |
731 | struct window *w; | |
732 | { | |
733 | register int vpos; | |
502b9b64 JB |
734 | register struct frame_glyphs *current_frame, *desired_frame; |
735 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
736 | int start = XFASTINT (w->left); |
737 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
738 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
739 | ||
502b9b64 JB |
740 | current_frame = FRAME_CURRENT_GLYPHS (frame); |
741 | desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
742 | |
743 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
744 | { | |
502b9b64 | 745 | if (current_frame->enable[vpos] && desired_frame->enable[vpos]) |
4588ec20 JB |
746 | { |
747 | if (start > 0) | |
748 | { | |
749 | int len; | |
750 | ||
502b9b64 JB |
751 | bcopy (current_frame->glyphs[vpos], |
752 | desired_frame->glyphs[vpos], start); | |
753 | len = min (start, current_frame->used[vpos]); | |
754 | if (desired_frame->used[vpos] < len) | |
755 | desired_frame->used[vpos] = len; | |
4588ec20 | 756 | } |
502b9b64 JB |
757 | if (current_frame->used[vpos] > end |
758 | && desired_frame->used[vpos] < current_frame->used[vpos]) | |
4588ec20 | 759 | { |
502b9b64 JB |
760 | while (desired_frame->used[vpos] < end) |
761 | desired_frame->glyphs[vpos][desired_frame->used[vpos]++] | |
4588ec20 | 762 | = SPACEGLYPH; |
502b9b64 JB |
763 | bcopy (current_frame->glyphs[vpos] + end, |
764 | desired_frame->glyphs[vpos] + end, | |
765 | current_frame->used[vpos] - end); | |
766 | desired_frame->used[vpos] = current_frame->used[vpos]; | |
4588ec20 JB |
767 | } |
768 | } | |
769 | } | |
770 | } | |
771 | \f | |
772 | #if 0 | |
773 | ||
502b9b64 | 774 | /* If window w does not need to be updated and isn't the full frame wide, |
4588ec20 | 775 | copy all the columns that w does occupy |
502b9b64 JB |
776 | into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame) |
777 | so that update_frame will not change those columns. | |
4588ec20 JB |
778 | |
779 | Have not been able to figure out how to use this correctly. */ | |
780 | ||
781 | preserve_my_columns (w) | |
782 | struct window *w; | |
783 | { | |
784 | register int vpos, fin; | |
502b9b64 JB |
785 | register struct frame_glyphs *l1, *l2; |
786 | register FRAME_PTR frame = XFRAME (w->frame); | |
4588ec20 JB |
787 | int start = XFASTINT (w->left); |
788 | int end = XFASTINT (w->left) + XFASTINT (w->width); | |
789 | int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
790 | ||
791 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
792 | { | |
502b9b64 JB |
793 | if ((l1 = FRAME_DESIRED_GLYPHS (frame)->glyphs[vpos + 1]) |
794 | && (l2 = FRAME_PHYS_GLYPHS (frame)->glyphs[vpos + 1])) | |
4588ec20 JB |
795 | { |
796 | if (l2->length > start && l1->length < l2->length) | |
797 | { | |
798 | fin = l2->length; | |
799 | if (fin > end) fin = end; | |
800 | while (l1->length < start) | |
801 | l1->body[l1->length++] = ' '; | |
802 | bcopy (l2->body + start, l1->body + start, fin - start); | |
803 | l1->length = fin; | |
804 | } | |
805 | } | |
806 | } | |
807 | } | |
808 | ||
809 | #endif | |
810 | \f | |
811 | /* On discovering that the redisplay for a window was no good, | |
812 | cancel the columns of that window, so that when the window is | |
813 | displayed over again get_display_line will not complain. */ | |
814 | ||
815 | cancel_my_columns (w) | |
816 | struct window *w; | |
817 | { | |
818 | register int vpos; | |
502b9b64 JB |
819 | register struct frame_glyphs *desired_glyphs = |
820 | FRAME_DESIRED_GLYPHS (XFRAME (w->frame)); | |
4588ec20 JB |
821 | register int start = XFASTINT (w->left); |
822 | register int bot = XFASTINT (w->top) + XFASTINT (w->height); | |
823 | ||
824 | for (vpos = XFASTINT (w->top); vpos < bot; vpos++) | |
825 | if (desired_glyphs->enable[vpos] | |
826 | && desired_glyphs->used[vpos] >= start) | |
827 | desired_glyphs->used[vpos] = start; | |
828 | } | |
829 | \f | |
502b9b64 | 830 | /* These functions try to perform directly and immediately on the frame |
4588ec20 JB |
831 | the necessary output for one change in the buffer. |
832 | They may return 0 meaning nothing was done if anything is difficult, | |
833 | or 1 meaning the output was performed properly. | |
502b9b64 | 834 | They assume that the frame was up to date before the buffer |
94aa5d2d | 835 | change being displayed. They make various other assumptions too; |
4588ec20 JB |
836 | see command_loop_1 where these are called. */ |
837 | ||
838 | int | |
839 | direct_output_for_insert (g) | |
840 | int g; | |
841 | { | |
502b9b64 JB |
842 | register FRAME_PTR frame = selected_frame; |
843 | register struct frame_glyphs *current_frame | |
844 | = FRAME_CURRENT_GLYPHS (frame); | |
4588ec20 JB |
845 | |
846 | #ifndef COMPILER_REGISTER_BUG | |
847 | register | |
848 | #endif /* COMPILER_REGISTER_BUG */ | |
849 | struct window *w = XWINDOW (selected_window); | |
850 | #ifndef COMPILER_REGISTER_BUG | |
851 | register | |
852 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 853 | int hpos = FRAME_CURSOR_X (frame); |
4588ec20 JB |
854 | #ifndef COMPILER_REGISTER_BUG |
855 | register | |
856 | #endif /* COMPILER_REGISTER_BUG */ | |
502b9b64 | 857 | int vpos = FRAME_CURSOR_Y (frame); |
4588ec20 | 858 | |
fa61c701 JB |
859 | /* Give up if about to continue line. */ |
860 | if (hpos >= XFASTINT (w->left) + window_internal_width (w) - 1 | |
861 | ||
4588ec20 JB |
862 | /* Avoid losing if cursor is in invisible text off left margin */ |
863 | || (XINT (w->hscroll) && hpos == XFASTINT (w->left)) | |
864 | ||
865 | /* Give up if cursor outside window (in minibuf, probably) */ | |
648fa17d | 866 | || cursor_in_echo_area |
502b9b64 JB |
867 | || FRAME_CURSOR_Y (frame) < XFASTINT (w->top) |
868 | || FRAME_CURSOR_Y (frame) >= XFASTINT (w->top) + XFASTINT (w->height) | |
4588ec20 | 869 | |
502b9b64 | 870 | /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */ |
4588ec20 JB |
871 | || !display_completed |
872 | ||
873 | /* Give up if buffer appears in two places. */ | |
874 | || buffer_shared > 1 | |
875 | ||
876 | /* Give up if w is minibuffer and a message is being displayed there */ | |
877 | || (MINI_WINDOW_P (w) && echo_area_glyphs)) | |
878 | return 0; | |
879 | ||
502b9b64 | 880 | current_frame->glyphs[vpos][hpos] = g; |
4588ec20 JB |
881 | unchanged_modified = MODIFF; |
882 | beg_unchanged = GPT - BEG; | |
883 | XFASTINT (w->last_point) = point; | |
884 | XFASTINT (w->last_point_x) = hpos; | |
885 | XFASTINT (w->last_modified) = MODIFF; | |
886 | ||
887 | reassert_line_highlight (0, vpos); | |
502b9b64 | 888 | write_glyphs (¤t_frame->glyphs[vpos][hpos], 1); |
4588ec20 | 889 | fflush (stdout); |
502b9b64 JB |
890 | ++FRAME_CURSOR_X (frame); |
891 | if (hpos == current_frame->used[vpos]) | |
4588ec20 | 892 | { |
502b9b64 JB |
893 | current_frame->used[vpos] = hpos + 1; |
894 | current_frame->glyphs[vpos][hpos + 1] = 0; | |
4588ec20 JB |
895 | } |
896 | ||
897 | return 1; | |
898 | } | |
899 | ||
900 | int | |
901 | direct_output_forward_char (n) | |
902 | int n; | |
903 | { | |
502b9b64 | 904 | register FRAME_PTR frame = selected_frame; |
4588ec20 JB |
905 | register struct window *w = XWINDOW (selected_window); |
906 | ||
a9764248 JB |
907 | /* Avoid losing if cursor is in invisible text off left margin |
908 | or about to go off either side of window. */ | |
502b9b64 | 909 | if ((FRAME_CURSOR_X (frame) == XFASTINT (w->left) |
a9764248 JB |
910 | && (XINT (w->hscroll) || n < 0)) |
911 | || (n > 0 | |
fa61c701 | 912 | && (FRAME_CURSOR_X (frame) + 1 >= window_internal_width (w) - 1)) |
648fa17d | 913 | || cursor_in_echo_area) |
4588ec20 JB |
914 | return 0; |
915 | ||
502b9b64 JB |
916 | FRAME_CURSOR_X (frame) += n; |
917 | XFASTINT (w->last_point_x) = FRAME_CURSOR_X (frame); | |
4588ec20 | 918 | XFASTINT (w->last_point) = point; |
502b9b64 | 919 | cursor_to (FRAME_CURSOR_Y (frame), FRAME_CURSOR_X (frame)); |
4588ec20 JB |
920 | fflush (stdout); |
921 | return 1; | |
922 | } | |
923 | \f | |
924 | static void update_line (); | |
925 | ||
502b9b64 | 926 | /* Update frame F based on the data in FRAME_DESIRED_GLYPHS. |
4588ec20 JB |
927 | Value is nonzero if redisplay stopped due to pending input. |
928 | FORCE nonzero means do not stop for pending input. */ | |
929 | ||
930 | int | |
502b9b64 JB |
931 | update_frame (f, force, inhibit_hairy_id) |
932 | FRAME_PTR f; | |
4588ec20 JB |
933 | int force; |
934 | int inhibit_hairy_id; | |
935 | { | |
502b9b64 JB |
936 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (f); |
937 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (f); | |
4588ec20 JB |
938 | register int i; |
939 | int pause; | |
940 | int preempt_count = baud_rate / 2400 + 1; | |
941 | extern input_pending; | |
942 | #ifdef HAVE_X_WINDOWS | |
943 | register int downto, leftmost; | |
944 | #endif | |
945 | ||
502b9b64 | 946 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
947 | |
948 | detect_input_pending (); | |
949 | if (input_pending && !force) | |
950 | { | |
951 | pause = 1; | |
952 | goto do_pause; | |
953 | } | |
954 | ||
502b9b64 | 955 | update_begin (f); |
4588ec20 JB |
956 | |
957 | if (!line_ins_del_ok) | |
958 | inhibit_hairy_id = 1; | |
959 | ||
efb859b4 JB |
960 | /* See if any of the desired lines are enabled; don't compute for |
961 | i/d line if just want cursor motion. */ | |
502b9b64 JB |
962 | for (i = 0; i < FRAME_HEIGHT (f); i++) |
963 | if (desired_frame->enable[i]) | |
4588ec20 JB |
964 | break; |
965 | ||
966 | /* Try doing i/d line, if not yet inhibited. */ | |
502b9b64 JB |
967 | if (!inhibit_hairy_id && i < FRAME_HEIGHT (f)) |
968 | force |= scrolling (f); | |
4588ec20 JB |
969 | |
970 | /* Update the individual lines as needed. Do bottom line first. */ | |
971 | ||
502b9b64 JB |
972 | if (desired_frame->enable[FRAME_HEIGHT (f) - 1]) |
973 | update_line (f, FRAME_HEIGHT (f) - 1); | |
4588ec20 JB |
974 | |
975 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 976 | if (FRAME_X_P (f)) |
4588ec20 | 977 | { |
502b9b64 JB |
978 | leftmost = downto = f->display.x->internal_border_width; |
979 | if (desired_frame->enable[0]) | |
4588ec20 | 980 | { |
502b9b64 JB |
981 | current_frame->top_left_x[FRAME_HEIGHT (f) - 1] = leftmost; |
982 | current_frame->top_left_y[FRAME_HEIGHT (f) - 1] | |
983 | = PIXEL_HEIGHT (f) - f->display.x->internal_border_width | |
448fd7c0 | 984 | - current_frame->pix_height[FRAME_HEIGHT (f) - 1]; |
502b9b64 JB |
985 | current_frame->top_left_x[0] = leftmost; |
986 | current_frame->top_left_y[0] = downto; | |
4588ec20 JB |
987 | } |
988 | } | |
989 | #endif /* HAVE_X_WINDOWS */ | |
990 | ||
991 | /* Now update the rest of the lines. */ | |
502b9b64 | 992 | for (i = 0; i < FRAME_HEIGHT (f) - 1 && (force || !input_pending); i++) |
4588ec20 | 993 | { |
502b9b64 | 994 | if (desired_frame->enable[i]) |
4588ec20 | 995 | { |
b6a65ac2 | 996 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
997 | { |
998 | /* Flush out every so many lines. | |
999 | Also flush out if likely to have more than 1k buffered | |
1000 | otherwise. I'm told that some telnet connections get | |
1001 | really screwed by more than 1k output at once. */ | |
1002 | int outq = PENDING_OUTPUT_COUNT (stdout); | |
1003 | if (outq > 900 | |
1004 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
1005 | { | |
1006 | fflush (stdout); | |
1007 | if (preempt_count == 1) | |
1008 | { | |
a41f8bed JB |
1009 | #ifdef EMACS_OUTQSIZE |
1010 | if (EMACS_OUTQSIZE (0, &outq) < 0) | |
4588ec20 JB |
1011 | /* Probably not a tty. Ignore the error and reset |
1012 | * the outq count. */ | |
1013 | outq = PENDING_OUTPUT_COUNT (stdout); | |
1014 | #endif | |
1015 | outq *= 10; | |
1016 | sleep (outq / baud_rate); | |
1017 | } | |
1018 | } | |
1019 | if ((i - 1) % preempt_count == 0) | |
1020 | detect_input_pending (); | |
1021 | } | |
1022 | ||
502b9b64 | 1023 | update_line (f, i); |
4588ec20 | 1024 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1025 | if (FRAME_X_P (f)) |
4588ec20 | 1026 | { |
502b9b64 JB |
1027 | current_frame->top_left_y[i] = downto; |
1028 | current_frame->top_left_x[i] = leftmost; | |
4588ec20 JB |
1029 | } |
1030 | #endif /* HAVE_X_WINDOWS */ | |
1031 | } | |
1032 | ||
e5d77022 | 1033 | #ifdef HAVE_X_WINDOWS |
b6a65ac2 | 1034 | if (FRAME_X_P (f)) |
448fd7c0 | 1035 | downto += current_frame->pix_height[i]; |
e5d77022 | 1036 | #endif |
4588ec20 | 1037 | } |
502b9b64 | 1038 | pause = (i < FRAME_HEIGHT (f) - 1) ? i : 0; |
4588ec20 JB |
1039 | |
1040 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
1041 | if (!pause) | |
1042 | { | |
648fa17d JB |
1043 | if (cursor_in_echo_area |
1044 | && FRAME_HAS_MINIBUF_P (f)) | |
1113d9db | 1045 | { |
648fa17d JB |
1046 | int top = XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f))->top); |
1047 | int row, col; | |
1048 | ||
1049 | if (cursor_in_echo_area < 0) | |
1050 | { | |
1051 | row = top; | |
1052 | col = 0; | |
1053 | } | |
1113d9db | 1054 | else |
648fa17d JB |
1055 | { |
1056 | /* If the minibuffer is several lines high, find the last | |
1057 | line that has any text on it. */ | |
1058 | row = FRAME_HEIGHT (f); | |
1059 | do | |
1060 | { | |
1061 | row--; | |
1062 | if (current_frame->enable[row]) | |
1063 | col = current_frame->used[row]; | |
1064 | else | |
1065 | col = 0; | |
1066 | } | |
1067 | while (row > top && col == 0); | |
1068 | ||
1069 | if (col >= FRAME_WIDTH (f)) | |
1070 | { | |
1071 | col = 0; | |
1072 | if (row < FRAME_HEIGHT (f) - 1) | |
1073 | row++; | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | cursor_to (row, col); | |
1113d9db | 1078 | } |
4588ec20 | 1079 | else |
502b9b64 JB |
1080 | cursor_to (FRAME_CURSOR_Y (f), max (min (FRAME_CURSOR_X (f), |
1081 | FRAME_WIDTH (f) - 1), 0)); | |
4588ec20 JB |
1082 | } |
1083 | ||
502b9b64 | 1084 | update_end (f); |
4588ec20 JB |
1085 | |
1086 | if (termscript) | |
1087 | fflush (termscript); | |
1088 | fflush (stdout); | |
1089 | ||
1090 | /* Here if output is preempted because input is detected. */ | |
1091 | do_pause: | |
1092 | ||
502b9b64 | 1093 | if (FRAME_HEIGHT (f) == 0) abort (); /* Some bug zeros some core */ |
4588ec20 JB |
1094 | display_completed = !pause; |
1095 | ||
502b9b64 | 1096 | bzero (desired_frame->enable, FRAME_HEIGHT (f)); |
4588ec20 JB |
1097 | return pause; |
1098 | } | |
1099 | ||
1100 | /* Called when about to quit, to check for doing so | |
1101 | at an improper time. */ | |
1102 | ||
1103 | void | |
1104 | quit_error_check () | |
1105 | { | |
502b9b64 | 1106 | if (FRAME_DESIRED_GLYPHS (selected_frame) == 0) |
4588ec20 | 1107 | return; |
502b9b64 | 1108 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[0]) |
4588ec20 | 1109 | abort (); |
502b9b64 | 1110 | if (FRAME_DESIRED_GLYPHS (selected_frame)->enable[FRAME_HEIGHT (selected_frame) - 1]) |
4588ec20 JB |
1111 | abort (); |
1112 | } | |
1113 | \f | |
1114 | /* Decide what insert/delete line to do, and do it */ | |
1115 | ||
1116 | extern void scrolling_1 (); | |
1117 | ||
502b9b64 JB |
1118 | scrolling (frame) |
1119 | FRAME_PTR frame; | |
4588ec20 JB |
1120 | { |
1121 | int unchanged_at_top, unchanged_at_bottom; | |
1122 | int window_size; | |
1123 | int changed_lines; | |
502b9b64 JB |
1124 | int *old_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); |
1125 | int *new_hash = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
1126 | int *draw_cost = (int *) alloca (FRAME_HEIGHT (frame) * sizeof (int)); | |
4588ec20 | 1127 | register int i; |
502b9b64 JB |
1128 | int free_at_end_vpos = FRAME_HEIGHT (frame); |
1129 | register struct frame_glyphs *current_frame = FRAME_CURRENT_GLYPHS (frame); | |
1130 | register struct frame_glyphs *desired_frame = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 JB |
1131 | |
1132 | /* Compute hash codes of all the lines. | |
1133 | Also calculate number of changed lines, | |
1134 | number of unchanged lines at the beginning, | |
1135 | and number of unchanged lines at the end. */ | |
1136 | ||
1137 | changed_lines = 0; | |
1138 | unchanged_at_top = 0; | |
502b9b64 JB |
1139 | unchanged_at_bottom = FRAME_HEIGHT (frame); |
1140 | for (i = 0; i < FRAME_HEIGHT (frame); i++) | |
4588ec20 JB |
1141 | { |
1142 | /* Give up on this scrolling if some old lines are not enabled. */ | |
502b9b64 | 1143 | if (!current_frame->enable[i]) |
4588ec20 | 1144 | return 0; |
502b9b64 JB |
1145 | old_hash[i] = line_hash_code (current_frame, i); |
1146 | if (! desired_frame->enable[i]) | |
4588ec20 JB |
1147 | new_hash[i] = old_hash[i]; |
1148 | else | |
502b9b64 | 1149 | new_hash[i] = line_hash_code (desired_frame, i); |
4588ec20 JB |
1150 | |
1151 | if (old_hash[i] != new_hash[i]) | |
1152 | { | |
1153 | changed_lines++; | |
502b9b64 | 1154 | unchanged_at_bottom = FRAME_HEIGHT (frame) - i - 1; |
4588ec20 JB |
1155 | } |
1156 | else if (i == unchanged_at_top) | |
1157 | unchanged_at_top++; | |
502b9b64 | 1158 | draw_cost[i] = line_draw_cost (desired_frame, i); |
4588ec20 JB |
1159 | } |
1160 | ||
1161 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
1162 | if (changed_lines < baud_rate / 2400 | |
502b9b64 | 1163 | || unchanged_at_bottom == FRAME_HEIGHT (frame)) |
4588ec20 JB |
1164 | return 1; |
1165 | ||
502b9b64 | 1166 | window_size = (FRAME_HEIGHT (frame) - unchanged_at_top |
4588ec20 JB |
1167 | - unchanged_at_bottom); |
1168 | ||
1169 | if (scroll_region_ok) | |
1170 | free_at_end_vpos -= unchanged_at_bottom; | |
502b9b64 | 1171 | else if (memory_below_frame) |
4588ec20 JB |
1172 | free_at_end_vpos = -1; |
1173 | ||
1174 | /* If large window, fast terminal and few lines in common between | |
502b9b64 | 1175 | current frame and desired frame, don't bother with i/d calc. */ |
4588ec20 JB |
1176 | if (window_size >= 18 && baud_rate > 2400 |
1177 | && (window_size >= | |
1178 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
502b9b64 | 1179 | FRAME_HEIGHT (frame) - unchanged_at_bottom, |
4588ec20 JB |
1180 | old_hash, new_hash, draw_cost))) |
1181 | return 0; | |
1182 | ||
502b9b64 | 1183 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 JB |
1184 | draw_cost + unchanged_at_top - 1, |
1185 | old_hash + unchanged_at_top - 1, | |
1186 | new_hash + unchanged_at_top - 1, | |
1187 | free_at_end_vpos - unchanged_at_top); | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | \f | |
1192 | /* Return the offset in its buffer of the character at location col, line | |
1193 | in the given window. */ | |
1194 | int | |
1195 | buffer_posn_from_coords (window, col, line) | |
1196 | struct window *window; | |
1197 | int col, line; | |
1198 | { | |
1199 | int window_left = XFASTINT (window->left); | |
1200 | ||
1201 | /* The actual width of the window is window->width less one for the | |
efb859b4 JB |
1202 | DISP_CONTINUE_GLYPH, and less one if it's not the rightmost |
1203 | window. */ | |
fa61c701 | 1204 | int window_width = window_internal_width (window) - 1; |
4588ec20 | 1205 | |
efb859b4 | 1206 | int startp = marker_position (window->start); |
4588ec20 JB |
1207 | |
1208 | /* Since compute_motion will only operate on the current buffer, | |
1209 | we need to save the old one and restore it when we're done. */ | |
1210 | struct buffer *old_current_buffer = current_buffer; | |
efb859b4 | 1211 | struct position *posn; |
4588ec20 JB |
1212 | |
1213 | current_buffer = XBUFFER (window->buffer); | |
1214 | ||
502b9b64 JB |
1215 | /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME |
1216 | (window->frame))->bufp to avoid scanning from the very top of | |
efb859b4 JB |
1217 | the window, but it isn't maintained correctly, and I'm not even |
1218 | sure I will keep it. */ | |
1219 | posn = compute_motion (startp, 0, | |
1220 | (window == XWINDOW (minibuf_window) && startp == 1 | |
1221 | ? minibuf_prompt_width : 0), | |
1222 | ZV, line, col - window_left, | |
1223 | window_width, XINT (window->hscroll), 0); | |
4588ec20 JB |
1224 | |
1225 | current_buffer = old_current_buffer; | |
1226 | ||
502b9b64 | 1227 | /* compute_motion considers frame points past the end of a line |
efb859b4 JB |
1228 | to be *after* the newline, i.e. at the start of the next line. |
1229 | This is reasonable, but not really what we want. So if the | |
1230 | result is on a line below LINE, back it up one character. */ | |
1231 | if (posn->vpos > line) | |
1232 | return posn->bufpos - 1; | |
1233 | else | |
1234 | return posn->bufpos; | |
4588ec20 JB |
1235 | } |
1236 | \f | |
1237 | static int | |
1238 | count_blanks (r) | |
1239 | register GLYPH *r; | |
1240 | { | |
1241 | register GLYPH *p = r; | |
94aa5d2d RS |
1242 | while (*p++ == SPACEGLYPH); |
1243 | return p - r - 1; | |
4588ec20 JB |
1244 | } |
1245 | ||
1246 | static int | |
1247 | count_match (str1, str2) | |
1248 | GLYPH *str1, *str2; | |
1249 | { | |
1250 | register GLYPH *p1 = str1; | |
1251 | register GLYPH *p2 = str2; | |
1252 | while (*p1++ == *p2++); | |
1253 | return p1 - str1 - 1; | |
1254 | } | |
1255 | ||
1256 | /* Char insertion/deletion cost vector, from term.c */ | |
1257 | extern int *char_ins_del_vector; | |
1258 | ||
945807a3 | 1259 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))]) |
4588ec20 JB |
1260 | |
1261 | static void | |
502b9b64 JB |
1262 | update_line (frame, vpos) |
1263 | register FRAME_PTR frame; | |
4588ec20 JB |
1264 | int vpos; |
1265 | { | |
1266 | register GLYPH *obody, *nbody, *op1, *op2, *np1, *temp; | |
1267 | int tem; | |
1268 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
1269 | int save; | |
502b9b64 JB |
1270 | register struct frame_glyphs *current_frame |
1271 | = FRAME_CURRENT_GLYPHS (frame); | |
1272 | register struct frame_glyphs *desired_frame | |
1273 | = FRAME_DESIRED_GLYPHS (frame); | |
4588ec20 | 1274 | |
502b9b64 JB |
1275 | if (desired_frame->highlight[vpos] |
1276 | != (current_frame->enable[vpos] && current_frame->highlight[vpos])) | |
4588ec20 | 1277 | { |
502b9b64 JB |
1278 | change_line_highlight (desired_frame->highlight[vpos], vpos, |
1279 | (current_frame->enable[vpos] ? | |
1280 | current_frame->used[vpos] : 0)); | |
1281 | current_frame->enable[vpos] = 0; | |
4588ec20 JB |
1282 | } |
1283 | else | |
502b9b64 | 1284 | reassert_line_highlight (desired_frame->highlight[vpos], vpos); |
4588ec20 | 1285 | |
502b9b64 | 1286 | if (! current_frame->enable[vpos]) |
4588ec20 JB |
1287 | { |
1288 | olen = 0; | |
1289 | } | |
1290 | else | |
1291 | { | |
502b9b64 JB |
1292 | obody = current_frame->glyphs[vpos]; |
1293 | olen = current_frame->used[vpos]; | |
1294 | if (! current_frame->highlight[vpos]) | |
4588ec20 JB |
1295 | { |
1296 | if (!must_write_spaces) | |
1297 | while (obody[olen - 1] == SPACEGLYPH && olen > 0) | |
1298 | olen--; | |
1299 | } | |
1300 | else | |
1301 | { | |
1302 | /* For an inverse-video line, remember we gave it | |
502b9b64 | 1303 | spaces all the way to the frame edge |
4588ec20 JB |
1304 | so that the reverse video extends all the way across. */ |
1305 | ||
502b9b64 | 1306 | while (olen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1307 | obody[olen++] = SPACEGLYPH; |
1308 | } | |
1309 | } | |
1310 | ||
1311 | /* One way or another, this will enable the line being updated. */ | |
502b9b64 JB |
1312 | current_frame->enable[vpos] = 1; |
1313 | current_frame->used[vpos] = desired_frame->used[vpos]; | |
1314 | current_frame->highlight[vpos] = desired_frame->highlight[vpos]; | |
1315 | current_frame->bufp[vpos] = desired_frame->bufp[vpos]; | |
4588ec20 JB |
1316 | |
1317 | #ifdef HAVE_X_WINDOWS | |
b6a65ac2 | 1318 | if (FRAME_X_P (frame)) |
4588ec20 | 1319 | { |
502b9b64 JB |
1320 | current_frame->pix_width[vpos] |
1321 | = current_frame->used[vpos] | |
1322 | * FONT_WIDTH (frame->display.x->font); | |
1323 | current_frame->pix_height[vpos] | |
1324 | = FONT_HEIGHT (frame->display.x->font); | |
4588ec20 JB |
1325 | } |
1326 | #endif /* HAVE_X_WINDOWS */ | |
1327 | ||
502b9b64 | 1328 | if (!desired_frame->enable[vpos]) |
4588ec20 JB |
1329 | { |
1330 | nlen = 0; | |
1331 | goto just_erase; | |
1332 | } | |
1333 | ||
502b9b64 JB |
1334 | nbody = desired_frame->glyphs[vpos]; |
1335 | nlen = desired_frame->used[vpos]; | |
4588ec20 JB |
1336 | |
1337 | /* Pretend trailing spaces are not there at all, | |
1338 | unless for one reason or another we must write all spaces. */ | |
502b9b64 | 1339 | if (! desired_frame->highlight[vpos]) |
4588ec20 JB |
1340 | { |
1341 | if (!must_write_spaces) | |
1342 | /* We know that the previous character byte contains 0. */ | |
1343 | while (nbody[nlen - 1] == SPACEGLYPH) | |
1344 | nlen--; | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | /* For an inverse-video line, give it extra trailing spaces | |
502b9b64 | 1349 | all the way to the frame edge |
4588ec20 JB |
1350 | so that the reverse video extends all the way across. */ |
1351 | ||
502b9b64 | 1352 | while (nlen < FRAME_WIDTH (frame) - 1) |
4588ec20 JB |
1353 | nbody[nlen++] = SPACEGLYPH; |
1354 | } | |
1355 | ||
1356 | /* If there's no i/d char, quickly do the best we can without it. */ | |
1357 | if (!char_ins_del_ok) | |
1358 | { | |
1359 | int i,j; | |
1360 | ||
1361 | for (i = 0; i < nlen; i++) | |
1362 | { | |
1363 | if (i >= olen || nbody[i] != obody[i]) /* A non-matching char. */ | |
1364 | { | |
1365 | cursor_to (vpos, i); | |
1366 | for (j = 1; (i + j < nlen && | |
1367 | (i + j >= olen || nbody[i+j] != obody[i+j])); | |
1368 | j++); | |
1369 | ||
1370 | /* Output this run of non-matching chars. */ | |
1371 | write_glyphs (nbody + i, j); | |
1372 | i += j - 1; | |
1373 | ||
1374 | /* Now find the next non-match. */ | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | /* Clear the rest of the line, or the non-clear part of it. */ | |
1379 | if (olen > nlen) | |
1380 | { | |
1381 | cursor_to (vpos, nlen); | |
1382 | clear_end_of_line (olen); | |
1383 | } | |
1384 | ||
502b9b64 JB |
1385 | /* Exchange contents between current_frame and new_frame. */ |
1386 | temp = desired_frame->glyphs[vpos]; | |
1387 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1388 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1389 | |
1390 | return; | |
1391 | } | |
1392 | ||
1393 | if (!olen) | |
1394 | { | |
502b9b64 | 1395 | nsp = (must_write_spaces || desired_frame->highlight[vpos]) |
4588ec20 JB |
1396 | ? 0 : count_blanks (nbody); |
1397 | if (nlen > nsp) | |
1398 | { | |
1399 | cursor_to (vpos, nsp); | |
1400 | write_glyphs (nbody + nsp, nlen - nsp); | |
1401 | } | |
1402 | ||
502b9b64 JB |
1403 | /* Exchange contents between current_frame and new_frame. */ |
1404 | temp = desired_frame->glyphs[vpos]; | |
1405 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1406 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1407 | |
1408 | return; | |
1409 | } | |
1410 | ||
1411 | obody[olen] = 1; | |
1412 | save = nbody[nlen]; | |
1413 | nbody[nlen] = 0; | |
1414 | ||
1415 | /* Compute number of leading blanks in old and new contents. */ | |
1416 | osp = count_blanks (obody); | |
502b9b64 | 1417 | if (!desired_frame->highlight[vpos]) |
4588ec20 JB |
1418 | nsp = count_blanks (nbody); |
1419 | else | |
1420 | nsp = 0; | |
1421 | ||
1422 | /* Compute number of matching chars starting with first nonblank. */ | |
1423 | begmatch = count_match (obody + osp, nbody + nsp); | |
1424 | ||
1425 | /* Spaces in new match implicit space past the end of old. */ | |
1426 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
1427 | if (!must_write_spaces && osp + begmatch == olen) | |
1428 | { | |
1429 | np1 = nbody + nsp; | |
1430 | while (np1[begmatch] == SPACEGLYPH) | |
1431 | begmatch++; | |
1432 | } | |
1433 | ||
1434 | /* Avoid doing insert/delete char | |
1435 | just cause number of leading spaces differs | |
1436 | when the following text does not match. */ | |
1437 | if (begmatch == 0 && osp != nsp) | |
1438 | osp = nsp = min (osp, nsp); | |
1439 | ||
1440 | /* Find matching characters at end of line */ | |
1441 | op1 = obody + olen; | |
1442 | np1 = nbody + nlen; | |
1443 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
1444 | while (op1 > op2 && op1[-1] == np1[-1]) | |
1445 | { | |
1446 | op1--; | |
1447 | np1--; | |
1448 | } | |
1449 | endmatch = obody + olen - op1; | |
1450 | ||
1451 | /* Put correct value back in nbody[nlen]. | |
1452 | This is important because direct_output_for_insert | |
1453 | can write into the line at a later point. | |
1454 | If this screws up the zero at the end of the line, re-establish it. */ | |
1455 | nbody[nlen] = save; | |
1456 | obody[olen] = 0; | |
1457 | ||
1458 | /* tem gets the distance to insert or delete. | |
1459 | endmatch is how many characters we save by doing so. | |
1460 | Is it worth it? */ | |
1461 | ||
1462 | tem = (nlen - nsp) - (olen - osp); | |
1463 | if (endmatch && tem | |
502b9b64 | 1464 | && (!char_ins_del_ok || endmatch <= char_ins_del_cost (frame)[tem])) |
4588ec20 JB |
1465 | endmatch = 0; |
1466 | ||
1467 | /* nsp - osp is the distance to insert or delete. | |
1468 | If that is nonzero, begmatch is known to be nonzero also. | |
1469 | begmatch + endmatch is how much we save by doing the ins/del. | |
1470 | Is it worth it? */ | |
1471 | ||
1472 | if (nsp != osp | |
1473 | && (!char_ins_del_ok | |
502b9b64 | 1474 | || begmatch + endmatch <= char_ins_del_cost (frame)[nsp - osp])) |
4588ec20 JB |
1475 | { |
1476 | begmatch = 0; | |
1477 | endmatch = 0; | |
1478 | osp = nsp = min (osp, nsp); | |
1479 | } | |
1480 | ||
1481 | /* Now go through the line, inserting, writing and | |
1482 | deleting as appropriate. */ | |
1483 | ||
1484 | if (osp > nsp) | |
1485 | { | |
1486 | cursor_to (vpos, nsp); | |
1487 | delete_glyphs (osp - nsp); | |
1488 | } | |
1489 | else if (nsp > osp) | |
1490 | { | |
1491 | /* If going to delete chars later in line | |
1492 | and insert earlier in the line, | |
1493 | must delete first to avoid losing data in the insert */ | |
1494 | if (endmatch && nlen < olen + nsp - osp) | |
1495 | { | |
1496 | cursor_to (vpos, nlen - endmatch + osp - nsp); | |
1497 | delete_glyphs (olen + nsp - osp - nlen); | |
1498 | olen = nlen - (nsp - osp); | |
1499 | } | |
1500 | cursor_to (vpos, osp); | |
1501 | insert_glyphs ((char *)0, nsp - osp); | |
1502 | } | |
1503 | olen += nsp - osp; | |
1504 | ||
1505 | tem = nsp + begmatch + endmatch; | |
1506 | if (nlen != tem || olen != tem) | |
1507 | { | |
1508 | cursor_to (vpos, nsp + begmatch); | |
1509 | if (!endmatch || nlen == olen) | |
1510 | { | |
1511 | /* If new text being written reaches right margin, | |
1512 | there is no need to do clear-to-eol at the end. | |
1513 | (and it would not be safe, since cursor is not | |
1514 | going to be "at the margin" after the text is done) */ | |
502b9b64 | 1515 | if (nlen == FRAME_WIDTH (frame)) |
4588ec20 JB |
1516 | olen = 0; |
1517 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1518 | ||
1519 | #ifdef obsolete | |
1520 | ||
1521 | /* the following code loses disastrously if tem == nlen. | |
1522 | Rather than trying to fix that case, I am trying the simpler | |
1523 | solution found above. */ | |
1524 | ||
1525 | /* If the text reaches to the right margin, | |
1526 | it will lose one way or another (depending on AutoWrap) | |
1527 | to clear to end of line after outputting all the text. | |
1528 | So pause with one character to go and clear the line then. */ | |
502b9b64 | 1529 | if (nlen == FRAME_WIDTH (frame) && fast_clear_end_of_line && olen > nlen) |
4588ec20 JB |
1530 | { |
1531 | /* endmatch must be zero, and tem must equal nsp + begmatch */ | |
1532 | write_glyphs (nbody + tem, nlen - tem - 1); | |
1533 | clear_end_of_line (olen); | |
1534 | olen = 0; /* Don't let it be cleared again later */ | |
1535 | write_glyphs (nbody + nlen - 1, 1); | |
1536 | } | |
1537 | else | |
1538 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1539 | #endif /* OBSOLETE */ | |
1540 | ||
1541 | } | |
1542 | else if (nlen > olen) | |
1543 | { | |
1544 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
1545 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
1546 | olen = nlen; | |
1547 | } | |
1548 | else if (olen > nlen) | |
1549 | { | |
1550 | write_glyphs (nbody + nsp + begmatch, nlen - tem); | |
1551 | delete_glyphs (olen - nlen); | |
1552 | olen = nlen; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | just_erase: | |
1557 | /* If any unerased characters remain after the new line, erase them. */ | |
1558 | if (olen > nlen) | |
1559 | { | |
1560 | cursor_to (vpos, nlen); | |
1561 | clear_end_of_line (olen); | |
1562 | } | |
1563 | ||
502b9b64 JB |
1564 | /* Exchange contents between current_frame and new_frame. */ |
1565 | temp = desired_frame->glyphs[vpos]; | |
1566 | desired_frame->glyphs[vpos] = current_frame->glyphs[vpos]; | |
1567 | current_frame->glyphs[vpos] = temp; | |
4588ec20 JB |
1568 | } |
1569 | \f | |
1570 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
1571 | 1, 1, "FOpen termscript file: ", | |
1572 | "Start writing all terminal output to FILE as well as the terminal.\n\ | |
1573 | FILE = nil means just close any termscript file currently open.") | |
1574 | (file) | |
1575 | Lisp_Object file; | |
1576 | { | |
1577 | if (termscript != 0) fclose (termscript); | |
1578 | termscript = 0; | |
1579 | ||
efb859b4 | 1580 | if (! NILP (file)) |
4588ec20 JB |
1581 | { |
1582 | file = Fexpand_file_name (file, Qnil); | |
1583 | termscript = fopen (XSTRING (file)->data, "w"); | |
1584 | if (termscript == 0) | |
1585 | report_file_error ("Opening termscript", Fcons (file, Qnil)); | |
1586 | } | |
1587 | return Qnil; | |
1588 | } | |
1589 | \f | |
1590 | ||
1591 | #ifdef SIGWINCH | |
efb859b4 | 1592 | SIGTYPE |
4588ec20 JB |
1593 | window_change_signal () |
1594 | { | |
1595 | int width, height; | |
1596 | extern int errno; | |
1597 | int old_errno = errno; | |
1598 | ||
502b9b64 | 1599 | get_frame_size (&width, &height); |
4588ec20 | 1600 | |
502b9b64 JB |
1601 | /* The frame size change obviously applies to a termcap-controlled |
1602 | frame. Find such a frame in the list, and assume it's the only | |
4588ec20 | 1603 | one (since the redisplay code always writes to stdout, not a |
502b9b64 | 1604 | FILE * specified in the frame structure). Record the new size, |
4588ec20 JB |
1605 | but don't reallocate the data structures now. Let that be done |
1606 | later outside of the signal handler. */ | |
1607 | ||
1608 | { | |
35f56f96 | 1609 | Lisp_Object tail, frame; |
4588ec20 | 1610 | |
35f56f96 | 1611 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1612 | { |
35f56f96 | 1613 | if (FRAME_TERMCAP_P (XFRAME (frame))) |
4588ec20 | 1614 | { |
35f56f96 | 1615 | change_frame_size (XFRAME (frame), height, width, 0, 1); |
4588ec20 JB |
1616 | break; |
1617 | } | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | signal (SIGWINCH, window_change_signal); | |
1622 | errno = old_errno; | |
1623 | } | |
1624 | #endif /* SIGWINCH */ | |
1625 | ||
1626 | ||
502b9b64 | 1627 | /* Do any change in frame size that was requested by a signal. */ |
4588ec20 JB |
1628 | |
1629 | do_pending_window_change () | |
1630 | { | |
1631 | /* If window_change_signal should have run before, run it now. */ | |
1632 | while (delayed_size_change) | |
1633 | { | |
35f56f96 | 1634 | Lisp_Object tail, frame; |
4588ec20 JB |
1635 | |
1636 | delayed_size_change = 0; | |
1637 | ||
35f56f96 | 1638 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 1639 | { |
35f56f96 JB |
1640 | FRAME_PTR f = XFRAME (frame); |
1641 | ||
502b9b64 JB |
1642 | int height = FRAME_NEW_HEIGHT (f); |
1643 | int width = FRAME_NEW_WIDTH (f); | |
4588ec20 | 1644 | |
502b9b64 JB |
1645 | FRAME_NEW_HEIGHT (f) = 0; |
1646 | FRAME_NEW_WIDTH (f) = 0; | |
4588ec20 JB |
1647 | |
1648 | if (height != 0) | |
b6a65ac2 | 1649 | change_frame_size (f, height, width, 0, 0); |
4588ec20 JB |
1650 | } |
1651 | } | |
1652 | } | |
1653 | ||
1654 | ||
502b9b64 | 1655 | /* Change the frame height and/or width. Values may be given as zero to |
b6a65ac2 | 1656 | indicate no change is to take place. |
4588ec20 | 1657 | |
b6a65ac2 JB |
1658 | If DELAY is non-zero, then assume we're being called from a signal |
1659 | handler, and queue the change for later - perhaps the next | |
1660 | redisplay. Since this tries to resize windows, we can't call it | |
1661 | from a signal handler. */ | |
1662 | ||
1663 | change_frame_size (frame, newheight, newwidth, pretend, delay) | |
502b9b64 | 1664 | register FRAME_PTR frame; |
b6a65ac2 | 1665 | int newheight, newwidth, pretend; |
4588ec20 JB |
1666 | { |
1667 | /* If we can't deal with the change now, queue it for later. */ | |
b6a65ac2 | 1668 | if (delay) |
4588ec20 | 1669 | { |
b6a65ac2 | 1670 | FRAME_NEW_HEIGHT (frame) = newheight; |
502b9b64 | 1671 | FRAME_NEW_WIDTH (frame) = newwidth; |
4588ec20 JB |
1672 | delayed_size_change = 1; |
1673 | return; | |
1674 | } | |
1675 | ||
502b9b64 JB |
1676 | /* This size-change overrides any pending one for this frame. */ |
1677 | FRAME_NEW_HEIGHT (frame) = 0; | |
b6a65ac2 JB |
1678 | FRAME_NEW_WIDTH (frame) = 0; |
1679 | ||
1680 | /* If an arguments is zero, set it to the current value. */ | |
1681 | newheight || (newheight = FRAME_HEIGHT (frame)); | |
1682 | newwidth || (newwidth = FRAME_WIDTH (frame)); | |
4588ec20 | 1683 | |
b6a65ac2 JB |
1684 | /* Round up to the smallest acceptable size. */ |
1685 | check_frame_size (frame, &newheight, &newwidth); | |
1686 | ||
1687 | /* If we're not changing the frame size, quit now. */ | |
1688 | if (newheight == FRAME_HEIGHT (frame) | |
1689 | && newwidth == FRAME_WIDTH (frame)) | |
4588ec20 JB |
1690 | return; |
1691 | ||
b6a65ac2 | 1692 | if (newheight != FRAME_HEIGHT (frame)) |
4588ec20 | 1693 | { |
b6a65ac2 | 1694 | if (FRAME_HAS_MINIBUF_P (frame) |
502b9b64 | 1695 | && ! FRAME_MINIBUF_ONLY_P (frame)) |
4588ec20 | 1696 | { |
502b9b64 JB |
1697 | /* Frame has both root and minibuffer. */ |
1698 | set_window_height (FRAME_ROOT_WINDOW (frame), | |
cb470ab1 | 1699 | newheight - 1 - FRAME_MENU_BAR_LINES (frame), 0); |
502b9b64 | 1700 | XFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame))->top) |
b6a65ac2 | 1701 | = newheight - 1; |
502b9b64 | 1702 | set_window_height (FRAME_MINIBUF_WINDOW (frame), 1, 0); |
4588ec20 JB |
1703 | } |
1704 | else | |
502b9b64 | 1705 | /* Frame has just one top-level window. */ |
cb470ab1 RS |
1706 | set_window_height (FRAME_ROOT_WINDOW (frame), |
1707 | newheight - FRAME_MENU_BAR_LINES (frame), 0); | |
b6a65ac2 JB |
1708 | |
1709 | if (FRAME_TERMCAP_P (frame) && !pretend) | |
1710 | FrameRows = newheight; | |
4588ec20 JB |
1711 | |
1712 | #if 0 | |
502b9b64 | 1713 | if (frame->output_method == output_termcap) |
4588ec20 | 1714 | { |
b6a65ac2 | 1715 | frame_height = newheight; |
4588ec20 | 1716 | if (!pretend) |
b6a65ac2 | 1717 | FrameRows = newheight; |
4588ec20 JB |
1718 | } |
1719 | #endif | |
1720 | } | |
1721 | ||
b6a65ac2 | 1722 | if (newwidth != FRAME_WIDTH (frame)) |
4588ec20 | 1723 | { |
502b9b64 | 1724 | set_window_width (FRAME_ROOT_WINDOW (frame), newwidth, 0); |
b6a65ac2 | 1725 | if (FRAME_HAS_MINIBUF_P (frame)) |
502b9b64 | 1726 | set_window_width (FRAME_MINIBUF_WINDOW (frame), newwidth, 0); |
4588ec20 | 1727 | |
b6a65ac2 | 1728 | if (FRAME_TERMCAP_P (frame) && !pretend) |
502b9b64 | 1729 | FrameCols = newwidth; |
4588ec20 | 1730 | #if 0 |
502b9b64 | 1731 | if (frame->output_method == output_termcap) |
4588ec20 | 1732 | { |
502b9b64 | 1733 | frame_width = newwidth; |
4588ec20 | 1734 | if (!pretend) |
502b9b64 | 1735 | FrameCols = newwidth; |
4588ec20 JB |
1736 | } |
1737 | #endif | |
1738 | } | |
1739 | ||
b6a65ac2 JB |
1740 | FRAME_HEIGHT (frame) = newheight; |
1741 | FRAME_WIDTH (frame) = newwidth; | |
1742 | ||
502b9b64 JB |
1743 | remake_frame_glyphs (frame); |
1744 | calculate_costs (frame); | |
4588ec20 JB |
1745 | } |
1746 | \f | |
1747 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, | |
1748 | Ssend_string_to_terminal, 1, 1, 0, | |
1749 | "Send STRING to the terminal without alteration.\n\ | |
1750 | Control characters in STRING will have terminal-dependent effects.") | |
1751 | (str) | |
1752 | Lisp_Object str; | |
1753 | { | |
1754 | CHECK_STRING (str, 0); | |
1755 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, stdout); | |
1756 | fflush (stdout); | |
1757 | if (termscript) | |
1758 | { | |
1759 | fwrite (XSTRING (str)->data, 1, XSTRING (str)->size, termscript); | |
1760 | fflush (termscript); | |
1761 | } | |
1762 | return Qnil; | |
1763 | } | |
1764 | ||
1765 | DEFUN ("ding", Fding, Sding, 0, 1, 0, | |
1766 | "Beep, or flash the screen.\n\ | |
1767 | Also, unless an argument is given,\n\ | |
1768 | terminate any keyboard macro currently executing.") | |
1769 | (arg) | |
1770 | Lisp_Object arg; | |
1771 | { | |
efb859b4 | 1772 | if (!NILP (arg)) |
4588ec20 | 1773 | { |
7fa788da RS |
1774 | if (noninteractive) |
1775 | putchar (07); | |
1776 | else | |
1777 | ring_bell (); | |
4588ec20 JB |
1778 | fflush (stdout); |
1779 | } | |
1780 | else | |
1781 | bitch_at_user (); | |
1782 | ||
1783 | return Qnil; | |
1784 | } | |
1785 | ||
1786 | bitch_at_user () | |
1787 | { | |
1788 | if (noninteractive) | |
1789 | putchar (07); | |
1790 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ | |
1791 | error ("Keyboard macro terminated by a command ringing the bell"); | |
1792 | else | |
1793 | ring_bell (); | |
1794 | fflush (stdout); | |
1795 | } | |
1796 | ||
1797 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, | |
767229f8 JB |
1798 | "Pause, without updating display, for SECONDS seconds.\n\ |
1799 | Optional second arg MILLISECONDS specifies an additional wait period,\n\ | |
1800 | in milliseconds.\n\ | |
4588ec20 | 1801 | \(Not all operating systems support milliseconds.)") |
767229f8 JB |
1802 | (seconds, milliseconds) |
1803 | Lisp_Object seconds, milliseconds; | |
4588ec20 | 1804 | { |
767229f8 | 1805 | int sec, usec; |
4588ec20 | 1806 | |
767229f8 JB |
1807 | CHECK_NUMBER (seconds, 0); |
1808 | sec = XINT (seconds); | |
1809 | ||
1810 | if (NILP (milliseconds)) | |
1811 | XSET (milliseconds, Lisp_Int, 0); | |
1812 | else | |
1813 | CHECK_NUMBER (milliseconds, 1); | |
1814 | usec = XINT (milliseconds); | |
4588ec20 | 1815 | |
a41f8bed | 1816 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
1817 | if (sec == 0 && usec != 0) |
1818 | error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); | |
4588ec20 | 1819 | #endif |
767229f8 JB |
1820 | |
1821 | /* Assure that 0 <= usec < 1000000. */ | |
1822 | if (usec < 0) | |
1823 | { | |
1824 | /* We can't rely on the rounding being correct if user is negative. */ | |
1825 | if (-1000000 < usec) | |
1826 | sec--, usec += 1000000; | |
1827 | else | |
1828 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 1829 | } |
767229f8 JB |
1830 | else |
1831 | sec += usec / 1000000, usec %= 1000000; | |
1832 | ||
1833 | if (sec <= 0) | |
1834 | return Qnil; | |
4588ec20 | 1835 | |
f76475ad JB |
1836 | { |
1837 | Lisp_Object zero; | |
1838 | ||
1839 | XFASTINT (zero) = 0; | |
1840 | wait_reading_process_input (sec, usec, zero, 0); | |
1841 | } | |
d1af74e9 | 1842 | |
767229f8 JB |
1843 | /* We should always have wait_reading_process_input; we have a dummy |
1844 | implementation for systems which don't support subprocesses. */ | |
1845 | #if 0 | |
1846 | /* No wait_reading_process_input */ | |
4588ec20 JB |
1847 | immediate_quit = 1; |
1848 | QUIT; | |
1849 | ||
1850 | #ifdef VMS | |
1851 | sys_sleep (sec); | |
1852 | #else /* not VMS */ | |
1853 | /* The reason this is done this way | |
1854 | (rather than defined (H_S) && defined (H_T)) | |
1855 | is because the VMS preprocessor doesn't grok `defined' */ | |
1856 | #ifdef HAVE_SELECT | |
a41f8bed JB |
1857 | EMACS_GET_TIME (end_time); |
1858 | EMACS_SET_SECS_USECS (timeout, sec, usec); | |
d1af74e9 | 1859 | EMACS_ADD_TIME (end_time, end_time, timeout); |
a41f8bed | 1860 | |
4588ec20 JB |
1861 | while (1) |
1862 | { | |
a41f8bed JB |
1863 | EMACS_GET_TIME (timeout); |
1864 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1865 | if (EMACS_TIME_NEG_P (timeout) | |
1866 | || !select (1, 0, 0, 0, &timeout)) | |
4588ec20 JB |
1867 | break; |
1868 | } | |
4588ec20 JB |
1869 | #else /* not HAVE_SELECT */ |
1870 | sleep (sec); | |
1871 | #endif /* HAVE_SELECT */ | |
1872 | #endif /* not VMS */ | |
1873 | ||
1874 | immediate_quit = 0; | |
1875 | #endif /* no subprocesses */ | |
1876 | ||
1877 | return Qnil; | |
1878 | } | |
1879 | ||
f76475ad JB |
1880 | /* This is just like wait_reading_process_input, except that |
1881 | it does the redisplay. | |
1882 | ||
1883 | It's also just like Fsit_for, except that it can be used for | |
1884 | waiting for input as well. */ | |
4588ec20 | 1885 | |
f76475ad JB |
1886 | Lisp_Object |
1887 | sit_for (sec, usec, reading, display) | |
1888 | int sec, usec, reading, display; | |
1889 | { | |
1890 | Lisp_Object read_kbd; | |
4588ec20 JB |
1891 | |
1892 | if (detect_input_pending ()) | |
1893 | return Qnil; | |
4588ec20 | 1894 | |
f76475ad JB |
1895 | if (display) |
1896 | redisplay_preserve_echo_area (); | |
4588ec20 | 1897 | |
dfdb645c JB |
1898 | if (sec == 0 && usec == 0) |
1899 | return Qt; | |
1900 | ||
4588ec20 | 1901 | #ifdef SIGIO |
8fc798e9 | 1902 | gobble_input (0); |
f76475ad JB |
1903 | #endif |
1904 | ||
1905 | XSET (read_kbd, Lisp_Int, reading ? -1 : 1); | |
1906 | wait_reading_process_input (sec, usec, read_kbd, display); | |
1907 | ||
d1af74e9 | 1908 | |
500ab754 JB |
1909 | /* wait_reading_process_input should always be available now; it is |
1910 | simulated in a simple way on systems that don't support | |
1911 | subprocesses. */ | |
1912 | #if 0 | |
1913 | /* No wait_reading_process_input available. */ | |
4588ec20 JB |
1914 | immediate_quit = 1; |
1915 | QUIT; | |
1916 | ||
1917 | waitchannels = 1; | |
1918 | #ifdef VMS | |
f76475ad | 1919 | input_wait_timeout (XINT (arg)); |
4588ec20 | 1920 | #else /* not VMS */ |
d1af74e9 JB |
1921 | #ifndef HAVE_TIMEVAL |
1922 | timeout_sec = sec; | |
1923 | select (1, &waitchannels, 0, 0, &timeout_sec); | |
1924 | #else /* HAVE_TIMEVAL */ | |
1925 | timeout.tv_sec = sec; | |
1926 | timeout.tv_usec = usec; | |
4588ec20 | 1927 | select (1, &waitchannels, 0, 0, &timeout); |
d1af74e9 | 1928 | #endif /* HAVE_TIMEVAL */ |
4588ec20 JB |
1929 | #endif /* not VMS */ |
1930 | ||
1931 | immediate_quit = 0; | |
d1af74e9 | 1932 | #endif |
4588ec20 JB |
1933 | |
1934 | return detect_input_pending () ? Qnil : Qt; | |
1935 | } | |
1936 | ||
f76475ad | 1937 | DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, |
767229f8 JB |
1938 | "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\ |
1939 | Optional second arg MILLISECONDS specifies an additional wait period, in\n\ | |
1940 | milliseconds.\n\ | |
c5c6addf | 1941 | \(Not all operating systems support milliseconds.)\n\ |
f76475ad JB |
1942 | Optional third arg non-nil means don't redisplay, just wait for input.\n\ |
1943 | Redisplay is preempted as always if input arrives, and does not happen\n\ | |
1944 | if input is available before it starts.\n\ | |
1945 | Value is t if waited the full time with no input arriving.") | |
767229f8 JB |
1946 | (seconds, milliseconds, nodisp) |
1947 | Lisp_Object seconds, milliseconds, nodisp; | |
f76475ad | 1948 | { |
767229f8 | 1949 | int sec, usec; |
f76475ad | 1950 | |
767229f8 JB |
1951 | CHECK_NUMBER (seconds, 0); |
1952 | sec = XINT (seconds); | |
1953 | ||
1954 | if (NILP (milliseconds)) | |
1955 | XSET (milliseconds, Lisp_Int, 0); | |
1956 | else | |
1957 | CHECK_NUMBER (milliseconds, 1); | |
1958 | usec = XINT (milliseconds); | |
f76475ad | 1959 | |
f76475ad | 1960 | #ifndef EMACS_HAS_USECS |
767229f8 JB |
1961 | if (usec != 0 && sec == 0) |
1962 | error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE); | |
f76475ad | 1963 | #endif |
f76475ad JB |
1964 | |
1965 | return sit_for (sec, usec, 0, NILP (nodisp)); | |
1966 | } | |
4588ec20 JB |
1967 | \f |
1968 | char *terminal_type; | |
1969 | ||
1970 | /* Initialization done when Emacs fork is started, before doing stty. */ | |
1971 | /* Determine terminal type and set terminal_driver */ | |
1972 | /* Then invoke its decoding routine to set up variables | |
1973 | in the terminal package */ | |
1974 | ||
1975 | init_display () | |
1976 | { | |
1977 | #ifdef HAVE_X_WINDOWS | |
1978 | extern int display_arg; | |
1979 | #endif | |
1980 | ||
1981 | meta_key = 0; | |
1982 | inverse_video = 0; | |
1983 | cursor_in_echo_area = 0; | |
1984 | terminal_type = (char *) 0; | |
1985 | ||
1315c181 JB |
1986 | /* Now is the time to initialize this; it's used by init_sys_modes |
1987 | during startup. */ | |
1988 | Vwindow_system = Qnil; | |
4588ec20 | 1989 | |
1315c181 JB |
1990 | /* If the user wants to use a window system, we shouldn't bother |
1991 | initializing the terminal. This is especially important when the | |
1992 | terminal is so dumb that emacs gives up before and doesn't bother | |
1993 | using the window system. | |
4588ec20 | 1994 | |
1315c181 JB |
1995 | If the DISPLAY environment variable is set, try to use X, and die |
1996 | with an error message if that doesn't work. */ | |
4588ec20 JB |
1997 | |
1998 | #ifdef HAVE_X_WINDOWS | |
d460af17 JB |
1999 | if (! display_arg) |
2000 | { | |
2001 | #ifdef VMS | |
2002 | display_arg = getenv ("DECW$DISPLAY"); | |
2003 | #else | |
2004 | display_arg = getenv ("DISPLAY"); | |
2005 | #endif | |
f040093a | 2006 | } |
d460af17 JB |
2007 | |
2008 | if (!inhibit_window_system && display_arg) | |
4588ec20 JB |
2009 | { |
2010 | Vwindow_system = intern ("x"); | |
2011 | #ifdef HAVE_X11 | |
2012 | Vwindow_system_version = make_number (11); | |
2013 | #else | |
2014 | Vwindow_system_version = make_number (10); | |
2015 | #endif | |
2016 | return; | |
2017 | } | |
2018 | #endif /* HAVE_X_WINDOWS */ | |
2019 | ||
2020 | /* If no window system has been specified, try to use the terminal. */ | |
2021 | if (! isatty (0)) | |
2022 | { | |
2023 | fprintf (stderr, "emacs: standard input is not a tty\n"); | |
2024 | exit (1); | |
2025 | } | |
2026 | ||
2027 | /* Look at the TERM variable */ | |
2028 | terminal_type = (char *) getenv ("TERM"); | |
2029 | if (!terminal_type) | |
2030 | { | |
2031 | #ifdef VMS | |
2032 | fprintf (stderr, "Please specify your terminal type.\n\ | |
2033 | For types defined in VMS, use set term /device=TYPE.\n\ | |
2034 | For types not defined in VMS, use define emacs_term \"TYPE\".\n\ | |
2035 | \(The quotation marks are necessary since terminal types are lower case.)\n"); | |
2036 | #else | |
2037 | fprintf (stderr, "Please set the environment variable TERM; see tset(1).\n"); | |
2038 | #endif | |
2039 | exit (1); | |
2040 | } | |
2041 | ||
2042 | #ifdef VMS | |
2043 | /* VMS DCL tends to upcase things, so downcase term type. | |
2044 | Hardly any uppercase letters in terminal types; should be none. */ | |
2045 | { | |
2046 | char *new = (char *) xmalloc (strlen (terminal_type) + 1); | |
2047 | char *p; | |
2048 | ||
2049 | strcpy (new, terminal_type); | |
2050 | ||
2051 | for (p = new; *p; p++) | |
2052 | if (isupper (*p)) | |
2053 | *p = tolower (*p); | |
2054 | ||
2055 | terminal_type = new; | |
2056 | } | |
2057 | #endif | |
2058 | ||
2059 | term_init (terminal_type); | |
2060 | ||
502b9b64 JB |
2061 | remake_frame_glyphs (selected_frame); |
2062 | calculate_costs (selected_frame); | |
4588ec20 JB |
2063 | |
2064 | /* X and Y coordinates of the cursor between updates. */ | |
502b9b64 JB |
2065 | FRAME_CURSOR_X (selected_frame) = 0; |
2066 | FRAME_CURSOR_Y (selected_frame) = 0; | |
4588ec20 JB |
2067 | |
2068 | #ifdef SIGWINCH | |
2069 | #ifndef CANNOT_DUMP | |
2070 | if (initialized) | |
2071 | #endif /* CANNOT_DUMP */ | |
2072 | signal (SIGWINCH, window_change_signal); | |
2073 | #endif /* SIGWINCH */ | |
2074 | } | |
2075 | \f | |
2076 | syms_of_display () | |
2077 | { | |
502b9b64 JB |
2078 | #ifdef MULTI_FRAME |
2079 | defsubr (&Sredraw_frame); | |
4588ec20 JB |
2080 | #endif |
2081 | defsubr (&Sredraw_display); | |
2082 | defsubr (&Sopen_termscript); | |
2083 | defsubr (&Sding); | |
2084 | defsubr (&Ssit_for); | |
2085 | defsubr (&Ssleep_for); | |
2086 | defsubr (&Ssend_string_to_terminal); | |
2087 | ||
2088 | DEFVAR_INT ("baud-rate", &baud_rate, | |
2089 | "The output baud rate of the terminal.\n\ | |
2090 | On most systems, changing this value will affect the amount of padding\n\ | |
2091 | and the other strategic decisions made during redisplay."); | |
2092 | DEFVAR_BOOL ("inverse-video", &inverse_video, | |
502b9b64 | 2093 | "*Non-nil means invert the entire frame display.\n\ |
4588ec20 JB |
2094 | This means everything is in inverse video which otherwise would not be."); |
2095 | DEFVAR_BOOL ("visible-bell", &visible_bell, | |
502b9b64 | 2096 | "*Non-nil means try to flash the frame to represent a bell."); |
4588ec20 | 2097 | DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter, |
502b9b64 | 2098 | "*Non-nil means no need to redraw entire frame after suspending.\n\ |
4588ec20 | 2099 | A non-nil value is useful if the terminal can automatically preserve\n\ |
502b9b64 | 2100 | Emacs's frame display when you reenter Emacs.\n\ |
4588ec20 JB |
2101 | It is up to you to set this variable if your terminal can do that."); |
2102 | DEFVAR_LISP ("window-system", &Vwindow_system, | |
2103 | "A symbol naming the window-system under which Emacs is running\n\ | |
2104 | \(such as `x'), or nil if emacs is running on an ordinary terminal."); | |
2105 | DEFVAR_LISP ("window-system-version", &Vwindow_system_version, | |
2106 | "The version number of the window system in use.\n\ | |
2107 | For X windows, this is 10 or 11."); | |
2108 | DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area, | |
2109 | "Non-nil means put cursor in minibuffer, at end of any message there."); | |
2110 | DEFVAR_LISP ("glyph-table", &Vglyph_table, | |
502b9b64 | 2111 | "Table defining how to output a glyph code to the frame.\n\ |
4588ec20 JB |
2112 | If not nil, this is a vector indexed by glyph code to define the glyph.\n\ |
2113 | Each element can be:\n\ | |
2114 | integer: a glyph code which this glyph is an alias for.\n\ | |
2115 | string: output this glyph using that string (not impl. in X windows).\n\ | |
2116 | nil: this glyph mod 256 is char code to output,\n\ | |
2117 | and this glyph / 256 is face code for X windows (see `x-set-face')."); | |
2118 | Vglyph_table = Qnil; | |
2119 | ||
2120 | DEFVAR_LISP ("standard-display-table", &Vstandard_display_table, | |
2121 | "Display table to use for buffers that specify none.\n\ | |
2122 | See `buffer-display-table' for more information."); | |
2123 | Vstandard_display_table = Qnil; | |
2124 | ||
2125 | /* Initialize `window-system', unless init_display already decided it. */ | |
2126 | #ifdef CANNOT_DUMP | |
2127 | if (noninteractive) | |
2128 | #endif | |
2129 | { | |
2130 | Vwindow_system = Qnil; | |
2131 | Vwindow_system_version = Qnil; | |
2132 | } | |
2133 | } | |
2134 |