Commit | Line | Data |
---|---|---|
4588ec20 | 1 | /* Updating of data structures for redisplay. |
73b0cd50 | 2 | Copyright (C) 1985-1988, 1993-1995, 1997-2011 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
4588ec20 JB |
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 | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 18 | |
18160b98 | 19 | #include <config.h> |
68c45bf0 | 20 | #include <signal.h> |
565620a5 | 21 | #include <stdio.h> |
4588ec20 | 22 | #include <ctype.h> |
d7306fe6 | 23 | #include <setjmp.h> |
dfcf069d | 24 | #include <unistd.h> |
dfcf069d | 25 | |
47099d6f | 26 | #include "lisp.h" |
4588ec20 JB |
27 | #include "termchar.h" |
28 | #include "termopts.h" | |
a0879520 | 29 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
30 | #include "dispextern.h" |
31 | #include "cm.h" | |
4588ec20 | 32 | #include "buffer.h" |
83be827a | 33 | #include "character.h" |
d43721a2 | 34 | #include "keyboard.h" |
502b9b64 | 35 | #include "frame.h" |
428a555e | 36 | #include "termhooks.h" |
4588ec20 JB |
37 | #include "window.h" |
38 | #include "commands.h" | |
39 | #include "disptab.h" | |
40 | #include "indent.h" | |
d169fe39 | 41 | #include "intervals.h" |
97cf50e7 | 42 | #include "blockinput.h" |
dfcf069d | 43 | #include "process.h" |
4588ec20 | 44 | |
58b2bb63 | 45 | #include "syssignal.h" |
a41f8bed | 46 | |
4588ec20 JB |
47 | #ifdef HAVE_X_WINDOWS |
48 | #include "xterm.h" | |
5f5c8ee5 | 49 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 50 | |
fd2e066a GV |
51 | #ifdef HAVE_NTGUI |
52 | #include "w32term.h" | |
53 | #endif /* HAVE_NTGUI */ | |
54 | ||
edfda783 AR |
55 | #ifdef HAVE_NS |
56 | #include "nsterm.h" | |
57 | #endif | |
58 | ||
5f5c8ee5 | 59 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 60 | |
5f5c8ee5 | 61 | #include "systime.h" |
3883a901 RS |
62 | #include <errno.h> |
63 | ||
4588ec20 | 64 | /* Get number of chars of output now in the buffer of a stdio stream. |
5f5c8ee5 GM |
65 | This ought to be built in in stdio, but it isn't. Some s- files |
66 | override this because their stdio internals differ. */ | |
67 | ||
e3271ae5 | 68 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
69 | |
70 | /* The s- file might have overridden the definition with one that | |
71 | works for the system's C library. But we are using the GNU C | |
72 | library, so this is the right definition for every system. */ | |
73 | ||
3883a901 RS |
74 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
75 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
76 | #else | |
cb5558ff | 77 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 78 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
79 | #endif |
80 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
81 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
82 | #include <stdio_ext.h> | |
83 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
84 | #endif | |
cb5558ff | 85 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
86 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
87 | #endif | |
5f5c8ee5 GM |
88 | #endif /* not __GNU_LIBRARY__ */ |
89 | ||
5e617bc2 | 90 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
91 | #include <term.h> /* for tgetent */ |
92 | #endif | |
5f5c8ee5 GM |
93 | \f |
94 | /* Structure to pass dimensions around. Used for character bounding | |
95 | boxes, glyph matrix dimensions and alike. */ | |
96 | ||
97 | struct dim | |
98 | { | |
99 | int width; | |
100 | int height; | |
101 | }; | |
102 | ||
103 | \f | |
104 | /* Function prototypes. */ | |
105 | ||
f57e2426 | 106 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
107 | static int required_matrix_height (struct window *); |
108 | static int required_matrix_width (struct window *); | |
f57e2426 | 109 | static void adjust_frame_glyphs (struct frame *); |
f57e2426 | 110 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); |
5bf46f05 | 111 | static void increment_row_positions (struct glyph_row *, EMACS_INT, EMACS_INT); |
f57e2426 J |
112 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
113 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
114 | struct window *); | |
115 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
116 | struct window *); | |
f57e2426 J |
117 | static void adjust_frame_message_buffer (struct frame *); |
118 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
119 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
f57e2426 J |
120 | static void clear_window_matrices (struct window *, int); |
121 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
122 | static int scrolling_window (struct window *, int); | |
123 | static int update_window_line (struct window *, int, int *); | |
f57e2426 | 124 | static void mirror_make_current (struct window *, int); |
b96fd3e8 | 125 | #if GLYPH_DEBUG |
f57e2426 J |
126 | static void check_matrix_pointers (struct glyph_matrix *, |
127 | struct glyph_matrix *); | |
b96fd3e8 | 128 | #endif |
f57e2426 J |
129 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
130 | static int update_window_tree (struct window *, int); | |
131 | static int update_window (struct window *, int); | |
132 | static int update_frame_1 (struct frame *, int, int); | |
5bf46f05 | 133 | static int scrolling (struct frame *); |
f57e2426 | 134 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
135 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
136 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 137 | |
5f5c8ee5 | 138 | \f |
d012c62b KS |
139 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
140 | are supported, so we can check for input during redisplay at | |
141 | regular intervals. */ | |
142 | #ifdef EMACS_HAS_USECS | |
143 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
144 | #else | |
145 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
146 | #endif | |
147 | ||
148 | #if PERIODIC_PREEMPTION_CHECKING | |
149 | ||
d012c62b KS |
150 | /* Redisplay preemption timers. */ |
151 | ||
152 | static EMACS_TIME preemption_period; | |
153 | static EMACS_TIME preemption_next_check; | |
154 | ||
155 | #endif | |
156 | ||
a41f8bed | 157 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 158 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 159 | |
502b9b64 | 160 | int frame_garbaged; |
4588ec20 | 161 | |
5f5c8ee5 | 162 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
163 | |
164 | int display_completed; | |
165 | ||
e7067d00 | 166 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 167 | |
4588ec20 | 168 | \f |
5f5c8ee5 | 169 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 170 | variable always equals the_only_frame. */ |
4588ec20 | 171 | |
91fb7e1b | 172 | Lisp_Object selected_frame; |
4588ec20 | 173 | |
5f5c8ee5 | 174 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 175 | frames. This is usually the most recent such frame that was |
87485d6f MW |
176 | selected. In a single-frame version, this variable always holds |
177 | the address of the_only_frame. */ | |
4588ec20 | 178 | |
5f5c8ee5 | 179 | struct frame *last_nonminibuf_frame; |
d52bad65 | 180 | |
5f5c8ee5 | 181 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 182 | |
5bf46f05 | 183 | static int delayed_size_change; |
4588ec20 | 184 | |
5f5c8ee5 | 185 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 186 | |
5f5c8ee5 | 187 | static int glyphs_initialized_initially_p; |
4588ec20 | 188 | |
5f5c8ee5 | 189 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 190 | |
5f5c8ee5 | 191 | struct window *updated_window; |
4588ec20 | 192 | |
5f5c8ee5 | 193 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 194 | |
5f5c8ee5 GM |
195 | struct glyph_row *updated_row; |
196 | int updated_area; | |
4588ec20 | 197 | |
5f5c8ee5 | 198 | /* A glyph for a space. */ |
4588ec20 | 199 | |
5f5c8ee5 | 200 | struct glyph space_glyph; |
4588ec20 | 201 | |
5f5c8ee5 GM |
202 | /* Counts of allocated structures. These counts serve to diagnose |
203 | memory leaks and double frees. */ | |
4588ec20 | 204 | |
5bf46f05 PE |
205 | static int glyph_matrix_count; |
206 | static int glyph_pool_count; | |
4588ec20 | 207 | |
5f5c8ee5 GM |
208 | /* If non-null, the frame whose frame matrices are manipulated. If |
209 | null, window matrices are worked on. */ | |
4588ec20 | 210 | |
5f5c8ee5 | 211 | static struct frame *frame_matrix_frame; |
4588ec20 | 212 | |
5f5c8ee5 GM |
213 | /* Non-zero means that fonts have been loaded since the last glyph |
214 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
215 | be adjusted when this flag becomes non-zero during display. The | |
216 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
217 | loaded on demand. Another reason is that a line contains many |
218 | characters displayed by zero width or very narrow glyphs of | |
219 | variable-width fonts. */ | |
836d2cde | 220 | |
5f5c8ee5 | 221 | int fonts_changed_p; |
836d2cde | 222 | |
177c0ea7 | 223 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 224 | This may only be used for terminal frames. */ |
836d2cde | 225 | |
5f5c8ee5 | 226 | #if GLYPH_DEBUG |
4588ec20 | 227 | |
f57e2426 J |
228 | static int window_to_frame_vpos (struct window *, int); |
229 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
230 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
231 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 232 | |
9b0e97aa GM |
233 | /* One element of the ring buffer containing redisplay history |
234 | information. */ | |
235 | ||
236 | struct redisplay_history | |
237 | { | |
238 | char trace[512 + 100]; | |
239 | }; | |
240 | ||
241 | /* The size of the history buffer. */ | |
242 | ||
243 | #define REDISPLAY_HISTORY_SIZE 30 | |
244 | ||
245 | /* The redisplay history buffer. */ | |
246 | ||
247 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
248 | ||
249 | /* Next free entry in redisplay_history. */ | |
250 | ||
251 | static int history_idx; | |
252 | ||
253 | /* A tick that's incremented each time something is added to the | |
254 | history. */ | |
255 | ||
dfd153ae | 256 | static uprintmax_t history_tick; |
9b0e97aa | 257 | |
f57e2426 | 258 | static void add_frame_display_history (struct frame *, int); |
6a8aec41 | 259 | \f |
9b0e97aa GM |
260 | /* Add to the redisplay history how window W has been displayed. |
261 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 262 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
263 | has been interrupted for pending input. */ |
264 | ||
265 | static void | |
c56e0fd5 | 266 | add_window_display_history (struct window *w, const char *msg, int paused_p) |
9b0e97aa GM |
267 | { |
268 | char *buf; | |
177c0ea7 | 269 | |
9b0e97aa GM |
270 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
271 | history_idx = 0; | |
272 | buf = redisplay_history[history_idx].trace; | |
273 | ++history_idx; | |
177c0ea7 | 274 | |
8666506e PE |
275 | snprintf (buf, sizeof redisplay_history[0].trace, |
276 | "%"pMu": window %p (`%s')%s\n%s", | |
277 | history_tick++, | |
278 | w, | |
279 | ((BUFFERP (w->buffer) | |
280 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
281 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
282 | : "???"), | |
283 | paused_p ? " ***paused***" : "", | |
284 | msg); | |
9b0e97aa GM |
285 | } |
286 | ||
287 | ||
288 | /* Add to the redisplay history that frame F has been displayed. | |
289 | PAUSED_P non-zero means that the update has been interrupted for | |
290 | pending input. */ | |
291 | ||
292 | static void | |
59fc5cf9 | 293 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
294 | { |
295 | char *buf; | |
177c0ea7 | 296 | |
9b0e97aa GM |
297 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
298 | history_idx = 0; | |
299 | buf = redisplay_history[history_idx].trace; | |
300 | ++history_idx; | |
177c0ea7 | 301 | |
dfd153ae | 302 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
303 | history_tick++, |
304 | f, paused_p ? " ***paused***" : ""); | |
305 | } | |
306 | ||
307 | ||
a7ca3326 | 308 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 309 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 310 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 311 | (void) |
9b0e97aa GM |
312 | { |
313 | int i; | |
314 | ||
315 | for (i = history_idx - 1; i != history_idx; --i) | |
316 | { | |
317 | if (i < 0) | |
318 | i = REDISPLAY_HISTORY_SIZE - 1; | |
319 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
320 | } | |
321 | ||
322 | return Qnil; | |
323 | } | |
324 | ||
325 | ||
5f5c8ee5 | 326 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 327 | |
7df02016 KS |
328 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
329 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 330 | |
5f5c8ee5 | 331 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 332 | |
4588ec20 | 333 | |
dcc19aac | 334 | #if defined PROFILING && !HAVE___EXECUTABLE_START |
72af86bd | 335 | /* FIXME: only used to find text start for profiling. */ |
4588ec20 JB |
336 | |
337 | void | |
971de7fb | 338 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 339 | { |
72af86bd | 340 | abort (); |
177c0ea7 | 341 | } |
72af86bd | 342 | #endif |
5f5c8ee5 GM |
343 | \f |
344 | /*********************************************************************** | |
345 | Glyph Matrices | |
346 | ***********************************************************************/ | |
347 | ||
348 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
349 | pool from which memory for the matrix should be allocated, or null | |
350 | for window-based redisplay where no glyph pools are used. The | |
351 | member `pool' of the glyph matrix structure returned is set to | |
352 | POOL, the structure is otherwise zeroed. */ | |
353 | ||
5bf46f05 | 354 | static struct glyph_matrix * |
971de7fb | 355 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 356 | { |
5f5c8ee5 GM |
357 | struct glyph_matrix *result; |
358 | ||
359 | /* Allocate and clear. */ | |
360 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 361 | memset (result, 0, sizeof *result); |
4588ec20 | 362 | |
5f5c8ee5 GM |
363 | /* Increment number of allocated matrices. This count is used |
364 | to detect memory leaks. */ | |
365 | ++glyph_matrix_count; | |
4588ec20 | 366 | |
5f5c8ee5 GM |
367 | /* Set pool and return. */ |
368 | result->pool = pool; | |
369 | return result; | |
4588ec20 JB |
370 | } |
371 | ||
4588ec20 | 372 | |
5f5c8ee5 GM |
373 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
374 | ||
375 | The global counter glyph_matrix_count is decremented when a matrix | |
376 | is freed. If the count gets negative, more structures were freed | |
377 | than allocated, i.e. one matrix was freed more than once or a bogus | |
378 | pointer was passed to this function. | |
177c0ea7 | 379 | |
5f5c8ee5 GM |
380 | If MATRIX->pool is null, this means that the matrix manages its own |
381 | glyph memory---this is done for matrices on X frames. Freeing the | |
382 | matrix also frees the glyph memory in this case. */ | |
383 | ||
384 | static void | |
971de7fb | 385 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 386 | { |
5f5c8ee5 GM |
387 | if (matrix) |
388 | { | |
389 | int i; | |
390 | ||
391 | /* Detect the case that more matrices are freed than were | |
392 | allocated. */ | |
393 | if (--glyph_matrix_count < 0) | |
394 | abort (); | |
395 | ||
396 | /* Free glyph memory if MATRIX owns it. */ | |
397 | if (matrix->pool == NULL) | |
398 | for (i = 0; i < matrix->rows_allocated; ++i) | |
399 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 400 | |
5f5c8ee5 GM |
401 | /* Free row structures and the matrix itself. */ |
402 | xfree (matrix->rows); | |
403 | xfree (matrix); | |
404 | } | |
405 | } | |
4588ec20 | 406 | |
4588ec20 | 407 | |
5f5c8ee5 GM |
408 | /* Return the number of glyphs to reserve for a marginal area of |
409 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
410 | display line of window W. MARGIN gives the width of the marginal | |
411 | area in canonical character units. MARGIN should be an integer | |
412 | or a float. */ | |
413 | ||
414 | static int | |
971de7fb | 415 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
416 | { |
417 | int n; | |
4588ec20 | 418 | |
5f5c8ee5 | 419 | if (NUMBERP (margin)) |
4588ec20 | 420 | { |
7df02016 | 421 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
422 | double d = max (0, XFLOATINT (margin)); |
423 | d = min (width / 2 - 1, d); | |
35ec832e | 424 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
425 | } |
426 | else | |
427 | n = 0; | |
428 | ||
429 | return n; | |
430 | } | |
431 | ||
7a7270dd EZ |
432 | #if XASSERTS |
433 | /* Return non-zero if ROW's hash value is correct, zero if not. */ | |
434 | int | |
435 | verify_row_hash (struct glyph_row *row) | |
436 | { | |
015137db | 437 | return row->hash == row_hash (row); |
7a7270dd EZ |
438 | } |
439 | #endif | |
4588ec20 | 440 | |
5f5c8ee5 GM |
441 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
442 | window sizes. | |
4588ec20 | 443 | |
5f5c8ee5 GM |
444 | W is null if the function is called for a frame glyph matrix. |
445 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
446 | indices of the first column and row of MATRIX within the frame | |
447 | matrix, if such a matrix exists. They are zero for purely | |
448 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 449 | |
5f5c8ee5 GM |
450 | In window-based redisplay, where no frame matrices exist, glyph |
451 | matrices manage their own glyph storage. Otherwise, they allocate | |
452 | storage from a common frame glyph pool which can be found in | |
453 | MATRIX->pool. | |
23b0200c | 454 | |
5f5c8ee5 GM |
455 | The reason for this memory management strategy is to avoid complete |
456 | frame redraws if possible. When we allocate from a common pool, a | |
457 | change of the location or size of a sub-matrix within the pool | |
458 | requires a complete redisplay of the frame because we cannot easily | |
459 | make sure that the current matrices of all windows still agree with | |
460 | what is displayed on the screen. While this is usually fast, it | |
461 | leads to screen flickering. */ | |
23b0200c | 462 | |
5f5c8ee5 | 463 | static void |
971de7fb | 464 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
465 | { |
466 | int i; | |
467 | int new_rows; | |
468 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
469 | int header_line_changed_p = 0; |
470 | int header_line_p = 0; | |
5f5c8ee5 | 471 | int left = -1, right = -1; |
ca8a12a7 | 472 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 473 | |
6b61353c KH |
474 | /* See if W had a header line that has disappeared now, or vice versa. |
475 | Get W's size. */ | |
5f5c8ee5 GM |
476 | if (w) |
477 | { | |
6b61353c KH |
478 | window_box (w, -1, 0, 0, &window_width, &window_height); |
479 | ||
045dee35 GM |
480 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
481 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 482 | } |
045dee35 | 483 | matrix->header_line_p = header_line_p; |
23b0200c | 484 | |
6b61353c KH |
485 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
486 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
487 | haven't changed. This optimization is important because preserving |
488 | the matrix means preventing redisplay. */ | |
489 | if (matrix->pool == NULL) | |
490 | { | |
7df02016 KS |
491 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
492 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
493 | xassert (left >= 0 && right >= 0); |
494 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
495 | || right != matrix->right_margin_glyphs); | |
496 | ||
497 | if (!marginal_areas_changed_p | |
498 | && !fonts_changed_p | |
045dee35 | 499 | && !header_line_changed_p |
7df02016 KS |
500 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
501 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
502 | && matrix->window_height == window_height |
503 | && matrix->window_vscroll == w->vscroll | |
504 | && matrix->window_width == window_width) | |
505 | return; | |
506 | } | |
177c0ea7 | 507 | |
5f5c8ee5 GM |
508 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
509 | if (matrix->rows_allocated < dim.height) | |
510 | { | |
0065d054 | 511 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 512 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
513 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
514 | new_rows, INT_MAX, sizeof *matrix->rows); | |
515 | memset (matrix->rows + old_alloc, 0, | |
516 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
517 | } |
518 | else | |
519 | new_rows = 0; | |
60a8948a | 520 | |
5f5c8ee5 GM |
521 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
522 | on a frame not using window-based redisplay. Set up pointers for | |
523 | each row into the glyph pool. */ | |
524 | if (matrix->pool) | |
525 | { | |
526 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 527 | |
5f5c8ee5 | 528 | if (w) |
60a8948a | 529 | { |
5f5c8ee5 | 530 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 531 | w->left_margin_cols); |
5f5c8ee5 | 532 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 533 | w->right_margin_cols); |
60a8948a | 534 | } |
5f5c8ee5 GM |
535 | else |
536 | left = right = 0; | |
177c0ea7 | 537 | |
5f5c8ee5 | 538 | for (i = 0; i < dim.height; ++i) |
60a8948a | 539 | { |
5f5c8ee5 | 540 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
541 | |
542 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
543 | = (matrix->pool->glyphs |
544 | + (y + i) * matrix->pool->ncolumns | |
545 | + x); | |
177c0ea7 | 546 | |
5f5c8ee5 GM |
547 | if (w == NULL |
548 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 549 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
550 | { |
551 | row->glyphs[TEXT_AREA] | |
552 | = row->glyphs[LEFT_MARGIN_AREA]; | |
553 | row->glyphs[RIGHT_MARGIN_AREA] | |
554 | = row->glyphs[TEXT_AREA] + dim.width; | |
555 | row->glyphs[LAST_AREA] | |
556 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
557 | } | |
558 | else | |
559 | { | |
560 | row->glyphs[TEXT_AREA] | |
561 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
562 | row->glyphs[RIGHT_MARGIN_AREA] | |
563 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
564 | row->glyphs[LAST_AREA] | |
565 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
566 | } | |
60a8948a | 567 | } |
177c0ea7 | 568 | |
5f5c8ee5 GM |
569 | matrix->left_margin_glyphs = left; |
570 | matrix->right_margin_glyphs = right; | |
571 | } | |
572 | else | |
573 | { | |
574 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
575 | its own memory. It is a window matrix for window-based redisplay. |
576 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
577 | if (dim.width > matrix->matrix_w |
578 | || new_rows | |
045dee35 | 579 | || header_line_changed_p |
5f5c8ee5 | 580 | || marginal_areas_changed_p) |
4588ec20 | 581 | { |
5f5c8ee5 GM |
582 | struct glyph_row *row = matrix->rows; |
583 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 584 | |
5f5c8ee5 GM |
585 | while (row < end) |
586 | { | |
587 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
588 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
589 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 590 | |
5f5c8ee5 GM |
591 | /* The mode line never has marginal areas. */ |
592 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 593 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
594 | { |
595 | row->glyphs[TEXT_AREA] | |
596 | = row->glyphs[LEFT_MARGIN_AREA]; | |
597 | row->glyphs[RIGHT_MARGIN_AREA] | |
598 | = row->glyphs[TEXT_AREA] + dim.width; | |
599 | row->glyphs[LAST_AREA] | |
600 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
601 | } | |
602 | else | |
603 | { | |
604 | row->glyphs[TEXT_AREA] | |
605 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
606 | row->glyphs[RIGHT_MARGIN_AREA] | |
607 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
608 | row->glyphs[LAST_AREA] | |
609 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
610 | } | |
7a7270dd | 611 | xassert (!row->enabled_p || verify_row_hash (row)); |
5f5c8ee5 GM |
612 | ++row; |
613 | } | |
4588ec20 JB |
614 | } |
615 | ||
5f5c8ee5 GM |
616 | xassert (left >= 0 && right >= 0); |
617 | matrix->left_margin_glyphs = left; | |
618 | matrix->right_margin_glyphs = right; | |
619 | } | |
177c0ea7 | 620 | |
5f5c8ee5 GM |
621 | /* Number of rows to be used by MATRIX. */ |
622 | matrix->nrows = dim.height; | |
3ed36514 | 623 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 624 | |
b7b20fbd | 625 | if (w) |
5f5c8ee5 | 626 | { |
b7b20fbd | 627 | if (matrix == w->current_matrix) |
4588ec20 | 628 | { |
b7b20fbd GM |
629 | /* Mark rows in a current matrix of a window as not having |
630 | valid contents. It's important to not do this for | |
631 | desired matrices. When Emacs starts, it may already be | |
632 | building desired matrices when this function runs. */ | |
633 | if (window_width < 0) | |
634 | window_width = window_box_width (w, -1); | |
177c0ea7 | 635 | |
b7b20fbd GM |
636 | /* Optimize the case that only the height has changed (C-x 2, |
637 | upper window). Invalidate all rows that are no longer part | |
638 | of the window. */ | |
639 | if (!marginal_areas_changed_p | |
73d75a62 GM |
640 | && !header_line_changed_p |
641 | && new_rows == 0 | |
642 | && dim.width == matrix->matrix_w | |
7df02016 KS |
643 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
644 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 645 | && matrix->window_width == window_width) |
b7b20fbd | 646 | { |
dd42b31a GM |
647 | /* Find the last row in the window. */ |
648 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
649 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
650 | { | |
26447967 | 651 | ++i; |
dd42b31a GM |
652 | break; |
653 | } | |
b7b20fbd GM |
654 | |
655 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 656 | are invalidated below. */ |
b7b20fbd GM |
657 | if (INTEGERP (w->window_end_vpos) |
658 | && XFASTINT (w->window_end_vpos) >= i) | |
659 | w->window_end_valid = Qnil; | |
177c0ea7 | 660 | |
b7b20fbd GM |
661 | while (i < matrix->nrows) |
662 | matrix->rows[i++].enabled_p = 0; | |
663 | } | |
664 | else | |
665 | { | |
666 | for (i = 0; i < matrix->nrows; ++i) | |
667 | matrix->rows[i].enabled_p = 0; | |
668 | } | |
5f5c8ee5 | 669 | } |
b7b20fbd | 670 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 671 | { |
b7b20fbd GM |
672 | /* Rows in desired matrices always have to be cleared; |
673 | redisplay expects this is the case when it runs, so it | |
674 | had better be the case when we adjust matrices between | |
675 | redisplays. */ | |
5f5c8ee5 GM |
676 | for (i = 0; i < matrix->nrows; ++i) |
677 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 678 | } |
4588ec20 | 679 | } |
177c0ea7 JB |
680 | |
681 | ||
5f5c8ee5 GM |
682 | /* Remember last values to be able to optimize frame redraws. */ |
683 | matrix->matrix_x = x; | |
684 | matrix->matrix_y = y; | |
685 | matrix->matrix_w = dim.width; | |
686 | matrix->matrix_h = dim.height; | |
687 | ||
688 | /* Record the top y location and height of W at the time the matrix | |
689 | was last adjusted. This is used to optimize redisplay above. */ | |
690 | if (w) | |
4588ec20 | 691 | { |
7df02016 KS |
692 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
693 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
694 | matrix->window_height = window_height; |
695 | matrix->window_width = window_width; | |
696 | matrix->window_vscroll = w->vscroll; | |
697 | } | |
698 | } | |
4588ec20 | 699 | |
4588ec20 | 700 | |
5f5c8ee5 GM |
701 | /* Reverse the contents of rows in MATRIX between START and END. The |
702 | contents of the row at END - 1 end up at START, END - 2 at START + | |
703 | 1 etc. This is part of the implementation of rotate_matrix (see | |
704 | below). */ | |
d52bad65 | 705 | |
5f5c8ee5 | 706 | static void |
971de7fb | 707 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
708 | { |
709 | int i, j; | |
23b0200c | 710 | |
5f5c8ee5 GM |
711 | for (i = start, j = end - 1; i < j; ++i, --j) |
712 | { | |
713 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
714 | initialization. */ | |
715 | struct glyph_row temp; | |
716 | temp = matrix->rows[i]; | |
717 | matrix->rows[i] = matrix->rows[j]; | |
718 | matrix->rows[j] = temp; | |
719 | } | |
720 | } | |
23b0200c | 721 | |
23b0200c | 722 | |
5f5c8ee5 GM |
723 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
724 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
725 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
726 | row structures are moved around). | |
60a8948a | 727 | |
5f5c8ee5 GM |
728 | The algorithm used for rotating the vector was, I believe, first |
729 | described by Kernighan. See the vector R as consisting of two | |
730 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
731 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
732 | and reverse the result to get (ArBr)r which is BA. Similar for | |
733 | rotating right. */ | |
734 | ||
735 | void | |
971de7fb | 736 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
737 | { |
738 | if (by < 0) | |
739 | { | |
740 | /* Up (rotate left, i.e. towards lower indices). */ | |
741 | by = -by; | |
742 | reverse_rows (matrix, first, first + by); | |
743 | reverse_rows (matrix, first + by, last); | |
744 | reverse_rows (matrix, first, last); | |
745 | } | |
746 | else if (by > 0) | |
747 | { | |
748 | /* Down (rotate right, i.e. towards higher indices). */ | |
749 | reverse_rows (matrix, last - by, last); | |
750 | reverse_rows (matrix, first, last - by); | |
751 | reverse_rows (matrix, first, last); | |
752 | } | |
753 | } | |
754 | ||
755 | ||
756 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
757 | with indices START <= index < END. Increment positions by DELTA/ | |
758 | DELTA_BYTES. */ | |
759 | ||
760 | void | |
ace1712c EZ |
761 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
762 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
763 | { |
764 | /* Check that START and END are reasonable values. */ | |
765 | xassert (start >= 0 && start <= matrix->nrows); | |
766 | xassert (end >= 0 && end <= matrix->nrows); | |
767 | xassert (start <= end); | |
768 | ||
769 | for (; start < end; ++start) | |
86c11ba1 | 770 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
771 | } |
772 | ||
773 | ||
774 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
775 | the row indices of the first and last + 1 row to enable. If | |
776 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
777 | ||
778 | void | |
971de7fb | 779 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 780 | { |
3ed36514 GM |
781 | xassert (start <= end); |
782 | xassert (start >= 0 && start < matrix->nrows); | |
783 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 784 | |
5f5c8ee5 GM |
785 | for (; start < end; ++start) |
786 | matrix->rows[start].enabled_p = enabled_p != 0; | |
787 | } | |
788 | ||
789 | ||
790 | /* Clear MATRIX. | |
791 | ||
792 | This empties all rows in MATRIX by setting the enabled_p flag for | |
793 | all rows of the matrix to zero. The function prepare_desired_row | |
794 | will eventually really clear a row when it sees one with a zero | |
795 | enabled_p flag. | |
796 | ||
797 | Resets update hints to defaults value. The only update hint | |
798 | currently present is the flag MATRIX->no_scrolling_p. */ | |
799 | ||
800 | void | |
971de7fb | 801 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
802 | { |
803 | if (matrix) | |
804 | { | |
805 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
806 | matrix->no_scrolling_p = 0; | |
807 | } | |
808 | } | |
177c0ea7 | 809 | |
5f5c8ee5 GM |
810 | |
811 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
812 | Increment y-positions in glyph rows between START and END by DY, | |
813 | and recompute their visible height. */ | |
814 | ||
815 | void | |
971de7fb | 816 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
817 | { |
818 | int min_y, max_y; | |
177c0ea7 | 819 | |
5f5c8ee5 GM |
820 | xassert (start <= end); |
821 | xassert (start >= 0 && start < matrix->nrows); | |
822 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 823 | |
7df02016 KS |
824 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
825 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 826 | |
5f5c8ee5 GM |
827 | for (; start < end; ++start) |
828 | { | |
829 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 830 | |
5f5c8ee5 | 831 | row->y += dy; |
d6c747a4 | 832 | row->visible_height = row->height; |
177c0ea7 | 833 | |
5f5c8ee5 | 834 | if (row->y < min_y) |
d6c747a4 GM |
835 | row->visible_height -= min_y - row->y; |
836 | if (row->y + row->height > max_y) | |
837 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
838 | if (row->fringe_bitmap_periodic_p) |
839 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
840 | } |
841 | } | |
842 | ||
843 | ||
844 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
845 | invalid is done by setting enabled_p to zero for all rows in a | |
846 | current matrix. */ | |
847 | ||
848 | void | |
971de7fb | 849 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
850 | { |
851 | /* Clear frame current matrix, if we have one. */ | |
852 | if (f->current_matrix) | |
853 | clear_glyph_matrix (f->current_matrix); | |
854 | ||
855 | /* Clear the matrix of the menu bar window, if such a window exists. | |
856 | The menu bar window is currently used to display menus on X when | |
857 | no toolkit support is compiled in. */ | |
858 | if (WINDOWP (f->menu_bar_window)) | |
859 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
860 | ||
9ea173e8 GM |
861 | /* Clear the matrix of the tool-bar window, if any. */ |
862 | if (WINDOWP (f->tool_bar_window)) | |
863 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
864 | |
865 | /* Clear current window matrices. */ | |
866 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
867 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
868 | } | |
869 | ||
870 | ||
871 | /* Clear out all display lines of F for a coming redisplay. */ | |
872 | ||
873 | void | |
971de7fb | 874 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
875 | { |
876 | if (f->desired_matrix) | |
877 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 878 | |
5f5c8ee5 GM |
879 | if (WINDOWP (f->menu_bar_window)) |
880 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
881 | ||
9ea173e8 GM |
882 | if (WINDOWP (f->tool_bar_window)) |
883 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
884 | |
885 | /* Do it for window matrices. */ | |
886 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
887 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
888 | } | |
889 | ||
890 | ||
891 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
892 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
893 | ||
894 | static void | |
971de7fb | 895 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
896 | { |
897 | while (w) | |
898 | { | |
899 | if (!NILP (w->hchild)) | |
900 | { | |
901 | xassert (WINDOWP (w->hchild)); | |
902 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
903 | } | |
904 | else if (!NILP (w->vchild)) | |
905 | { | |
906 | xassert (WINDOWP (w->vchild)); | |
907 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
908 | } | |
909 | else | |
910 | { | |
911 | if (desired_p) | |
912 | clear_glyph_matrix (w->desired_matrix); | |
913 | else | |
914 | { | |
915 | clear_glyph_matrix (w->current_matrix); | |
916 | w->window_end_valid = Qnil; | |
917 | } | |
918 | } | |
919 | ||
920 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
921 | } | |
922 | } | |
923 | ||
924 | ||
925 | \f | |
926 | /*********************************************************************** | |
927 | Glyph Rows | |
928 | ||
929 | See dispextern.h for an overall explanation of glyph rows. | |
930 | ***********************************************************************/ | |
931 | ||
932 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
933 | changes in the glyph_row structure, i.e. addition or removal of | |
934 | structure members. */ | |
935 | ||
2cca872d KH |
936 | static struct glyph_row null_row; |
937 | ||
5f5c8ee5 | 938 | void |
971de7fb | 939 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
940 | { |
941 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
942 | |
943 | /* Save pointers. */ | |
944 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
945 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
946 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
947 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
948 | ||
949 | /* Clear. */ | |
950 | *row = null_row; | |
951 | ||
952 | /* Restore pointers. */ | |
953 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
954 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
955 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
956 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
957 | |
958 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
959 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
960 | Redisplay outputs such glyphs, and flickering effects were | |
961 | the result. This also depended on the contents of memory | |
962 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 963 | the code below. If the flickering is gone with that, chances |
45560b1a | 964 | are that the flickering has the same reason as here. */ |
72af86bd | 965 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 966 | #endif |
5f5c8ee5 GM |
967 | } |
968 | ||
969 | ||
970 | /* Make ROW an empty, enabled row of canonical character height, | |
971 | in window W starting at y-position Y. */ | |
972 | ||
973 | void | |
971de7fb | 974 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
975 | { |
976 | int min_y, max_y; | |
177c0ea7 | 977 | |
7df02016 KS |
978 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
979 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 980 | |
5f5c8ee5 GM |
981 | clear_glyph_row (row); |
982 | row->y = y; | |
408f5064 | 983 | row->ascent = row->phys_ascent = 0; |
7df02016 | 984 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 985 | row->visible_height = row->height; |
177c0ea7 | 986 | |
5f5c8ee5 | 987 | if (row->y < min_y) |
d6c747a4 GM |
988 | row->visible_height -= min_y - row->y; |
989 | if (row->y + row->height > max_y) | |
990 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
991 | |
992 | row->enabled_p = 1; | |
993 | } | |
994 | ||
995 | ||
996 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
997 | are the amounts by which to change positions. Note that the first | |
998 | glyph of the text area of a row can have a buffer position even if | |
999 | the used count of the text area is zero. Such rows display line | |
1000 | ends. */ | |
1001 | ||
5bf46f05 | 1002 | static void |
ace1712c EZ |
1003 | increment_row_positions (struct glyph_row *row, |
1004 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
1005 | { |
1006 | int area, i; | |
1007 | ||
1008 | /* Increment start and end positions. */ | |
1009 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1010 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1011 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1012 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1013 | CHARPOS (row->start.pos) += delta; |
1014 | BYTEPOS (row->start.pos) += delta_bytes; | |
1015 | CHARPOS (row->end.pos) += delta; | |
1016 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1017 | |
5cacdcfd KS |
1018 | if (!row->enabled_p) |
1019 | return; | |
1020 | ||
5f5c8ee5 GM |
1021 | /* Increment positions in glyphs. */ |
1022 | for (area = 0; area < LAST_AREA; ++area) | |
1023 | for (i = 0; i < row->used[area]; ++i) | |
1024 | if (BUFFERP (row->glyphs[area][i].object) | |
1025 | && row->glyphs[area][i].charpos > 0) | |
1026 | row->glyphs[area][i].charpos += delta; | |
1027 | ||
1028 | /* Capture the case of rows displaying a line end. */ | |
1029 | if (row->used[TEXT_AREA] == 0 | |
1030 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1031 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1032 | } | |
1033 | ||
1034 | ||
9af3e742 | 1035 | #if 0 |
5f5c8ee5 GM |
1036 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1037 | contents, i.e. glyph structure contents are exchanged between A and | |
1038 | B without changing glyph pointers in A and B. */ | |
1039 | ||
1040 | static void | |
1dae0f0a | 1041 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1042 | { |
1043 | int area; | |
1044 | ||
1045 | for (area = 0; area < LAST_AREA; ++area) | |
1046 | { | |
1047 | /* Number of glyphs to swap. */ | |
1048 | int max_used = max (a->used[area], b->used[area]); | |
1049 | ||
1050 | /* Start of glyphs in area of row A. */ | |
1051 | struct glyph *glyph_a = a->glyphs[area]; | |
1052 | ||
1053 | /* End + 1 of glyphs in area of row A. */ | |
1054 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1055 | ||
1056 | /* Start of glyphs in area of row B. */ | |
1057 | struct glyph *glyph_b = b->glyphs[area]; | |
1058 | ||
1059 | while (glyph_a < glyph_a_end) | |
1060 | { | |
1061 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1062 | initialization. */ | |
1063 | struct glyph temp; | |
1064 | temp = *glyph_a; | |
1065 | *glyph_a = *glyph_b; | |
1066 | *glyph_b = temp; | |
1067 | ++glyph_a; | |
1068 | ++glyph_b; | |
1069 | } | |
1070 | } | |
1071 | } | |
1072 | ||
9af3e742 | 1073 | #endif /* 0 */ |
5f5c8ee5 | 1074 | |
015137db EZ |
1075 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1076 | exchange the used[] array and the hash values of the rows, because | |
1077 | these should all go together for the row's hash value to be | |
1078 | correct. */ | |
5f5c8ee5 | 1079 | |
55d4c1b2 | 1080 | static inline void |
971de7fb | 1081 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1082 | { |
1083 | int i; | |
015137db EZ |
1084 | unsigned hash_tem = a->hash; |
1085 | ||
5f5c8ee5 GM |
1086 | for (i = 0; i < LAST_AREA + 1; ++i) |
1087 | { | |
1088 | struct glyph *temp = a->glyphs[i]; | |
015137db EZ |
1089 | short used_tem = a->used[i]; |
1090 | ||
5f5c8ee5 GM |
1091 | a->glyphs[i] = b->glyphs[i]; |
1092 | b->glyphs[i] = temp; | |
015137db EZ |
1093 | a->used[i] = b->used[i]; |
1094 | b->used[i] = used_tem; | |
5f5c8ee5 | 1095 | } |
015137db EZ |
1096 | a->hash = b->hash; |
1097 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1098 | } |
1099 | ||
1100 | ||
1101 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1102 | that glyph pointers, the `used' counts, and the hash values in the |
1103 | structures are left unchanged. */ | |
5f5c8ee5 | 1104 | |
55d4c1b2 | 1105 | static inline void |
971de7fb | 1106 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1107 | { |
1108 | struct glyph *pointers[1 + LAST_AREA]; | |
015137db EZ |
1109 | short used[1 + LAST_AREA]; |
1110 | unsigned hashval; | |
5f5c8ee5 GM |
1111 | |
1112 | /* Save glyph pointers of TO. */ | |
72af86bd | 1113 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1114 | memcpy (used, to->used, sizeof to->used); |
1115 | hashval = to->hash; | |
5f5c8ee5 GM |
1116 | |
1117 | /* Do a structure assignment. */ | |
1118 | *to = *from; | |
1119 | ||
1120 | /* Restore original pointers of TO. */ | |
72af86bd | 1121 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1122 | memcpy (to->used, used, sizeof to->used); |
1123 | to->hash = hashval; | |
5f5c8ee5 GM |
1124 | } |
1125 | ||
1126 | ||
5f5c8ee5 GM |
1127 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1128 | assignment TO = FROM, except that glyph pointers are not copied but | |
1129 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1130 | a memory leak. */ | |
1131 | ||
55d4c1b2 | 1132 | static inline void |
971de7fb | 1133 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1134 | { |
1135 | swap_glyph_pointers (to, from); | |
1136 | copy_row_except_pointers (to, from); | |
1137 | } | |
1138 | ||
1139 | ||
1140 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1141 | a row in a window matrix, is a slice of the glyph memory of the | |
1142 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1143 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1144 | memory of FRAME_ROW. */ | |
1145 | ||
2d5912c1 | 1146 | #if GLYPH_DEBUG |
9339e87f | 1147 | |
5f5c8ee5 | 1148 | static int |
59fc5cf9 | 1149 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1150 | { |
1151 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1152 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1153 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1154 | ||
1155 | return (frame_glyph_start <= window_glyph_start | |
1156 | && window_glyph_start < frame_glyph_end); | |
1157 | } | |
1158 | ||
9339e87f | 1159 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1160 | |
9af3e742 GM |
1161 | #if 0 |
1162 | ||
5f5c8ee5 GM |
1163 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1164 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1165 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1166 | ||
1167 | static struct glyph_row * | |
59fc5cf9 AS |
1168 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1169 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1170 | { |
1171 | int i; | |
1172 | ||
1173 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1174 | ||
1175 | for (i = 0; i < window_matrix->nrows; ++i) | |
1176 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1177 | frame_matrix->rows + row)) | |
1178 | break; | |
1179 | ||
1180 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1181 | } | |
1182 | ||
9af3e742 | 1183 | #endif /* 0 */ |
5f5c8ee5 GM |
1184 | |
1185 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1186 | i.e. they are only marked as to be cleared by setting their | |
1187 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1188 | call to this function really clears it. */ | |
1189 | ||
1190 | void | |
971de7fb | 1191 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1192 | { |
1193 | if (!row->enabled_p) | |
1194 | { | |
dfd153ae | 1195 | int rp = row->reversed_p; |
5009f85e | 1196 | |
5f5c8ee5 GM |
1197 | clear_glyph_row (row); |
1198 | row->enabled_p = 1; | |
5009f85e | 1199 | row->reversed_p = rp; |
5f5c8ee5 GM |
1200 | } |
1201 | } | |
1202 | ||
1203 | ||
1204 | /* Return a hash code for glyph row ROW. */ | |
1205 | ||
2f7c71a1 | 1206 | static int |
971de7fb | 1207 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1208 | { |
1209 | int hash = 0; | |
177c0ea7 | 1210 | |
5f5c8ee5 GM |
1211 | if (row->enabled_p) |
1212 | { | |
4cecaab8 MB |
1213 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1214 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1215 | ||
1216 | while (glyph < end) | |
1217 | { | |
1218 | int c = glyph->u.ch; | |
1219 | int face_id = glyph->face_id; | |
daf01701 | 1220 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1221 | c -= SPACEGLYPH; |
1222 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1223 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1224 | ++glyph; | |
1225 | } | |
5f5c8ee5 | 1226 | |
4cecaab8 MB |
1227 | if (hash == 0) |
1228 | hash = 1; | |
5f5c8ee5 GM |
1229 | } |
1230 | ||
1231 | return hash; | |
1232 | } | |
1233 | ||
1234 | ||
153a073c | 1235 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1236 | the number of characters in the line. If must_write_spaces is |
1237 | zero, leading and trailing spaces are ignored. */ | |
1238 | ||
dfd153ae | 1239 | static int |
971de7fb | 1240 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1241 | { |
1242 | struct glyph_row *row = matrix->rows + vpos; | |
1243 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1244 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1245 | int len; | |
1246 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1247 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1248 | |
1249 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1250 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1251 | { |
1252 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1253 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1254 | --end; |
1255 | ||
177c0ea7 | 1256 | /* All blank line. */ |
5f5c8ee5 GM |
1257 | if (end == beg) |
1258 | return 0; | |
1259 | ||
1260 | /* Skip over leading spaces. */ | |
1261 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1262 | ++beg; | |
1263 | } | |
1264 | ||
1265 | /* If we don't have a glyph-table, each glyph is one character, | |
1266 | so return the number of glyphs. */ | |
1267 | if (glyph_table_base == 0) | |
1268 | len = end - beg; | |
1269 | else | |
1270 | { | |
1271 | /* Otherwise, scan the glyphs and accumulate their total length | |
1272 | in LEN. */ | |
1273 | len = 0; | |
1274 | while (beg < end) | |
1275 | { | |
3fc809e2 | 1276 | GLYPH g; |
177c0ea7 | 1277 | |
3fc809e2 KS |
1278 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1279 | ||
565b39a8 | 1280 | if (GLYPH_INVALID_P (g) |
42186983 | 1281 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1282 | len += 1; |
1283 | else | |
1284 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1285 | |
5f5c8ee5 GM |
1286 | ++beg; |
1287 | } | |
1288 | } | |
177c0ea7 | 1289 | |
5f5c8ee5 GM |
1290 | return len; |
1291 | } | |
1292 | ||
1293 | ||
1294 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1295 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1296 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1297 | |
55d4c1b2 | 1298 | static inline int |
6b1f9ba4 | 1299 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 | 1300 | { |
7a7270dd EZ |
1301 | xassert (verify_row_hash (a)); |
1302 | xassert (verify_row_hash (b)); | |
1303 | ||
5f5c8ee5 GM |
1304 | if (a == b) |
1305 | return 1; | |
1306 | else if (a->hash != b->hash) | |
1307 | return 0; | |
1308 | else | |
1309 | { | |
1310 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1311 | int area; | |
1312 | ||
e4e0bee9 GM |
1313 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1314 | return 0; | |
1315 | ||
5f5c8ee5 GM |
1316 | /* Compare glyphs. */ |
1317 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1318 | { | |
1319 | if (a->used[area] != b->used[area]) | |
1320 | return 0; | |
177c0ea7 | 1321 | |
5f5c8ee5 GM |
1322 | a_glyph = a->glyphs[area]; |
1323 | a_end = a_glyph + a->used[area]; | |
1324 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1325 | |
5f5c8ee5 GM |
1326 | while (a_glyph < a_end |
1327 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1328 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1329 | |
5f5c8ee5 GM |
1330 | if (a_glyph != a_end) |
1331 | return 0; | |
1332 | } | |
1333 | ||
6b61353c KH |
1334 | if (a->fill_line_p != b->fill_line_p |
1335 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1336 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1337 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1338 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1339 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1340 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1341 | || a->right_fringe_offset != b->right_fringe_offset |
1342 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1343 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1344 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1345 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1346 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1347 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1348 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1349 | /* Different partially visible characters on left margin. */ |
1350 | || a->x != b->x | |
1351 | /* Different height. */ | |
1352 | || a->ascent != b->ascent | |
408f5064 GM |
1353 | || a->phys_ascent != b->phys_ascent |
1354 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1355 | || a->visible_height != b->visible_height) |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | return 1; | |
1360 | } | |
1361 | ||
1362 | ||
1363 | \f | |
1364 | /*********************************************************************** | |
1365 | Glyph Pool | |
1366 | ||
1367 | See dispextern.h for an overall explanation of glyph pools. | |
1368 | ***********************************************************************/ | |
1369 | ||
1370 | /* Allocate a glyph_pool structure. The structure returned is | |
1371 | initialized with zeros. The global variable glyph_pool_count is | |
1372 | incremented for each pool allocated. */ | |
1373 | ||
1374 | static struct glyph_pool * | |
971de7fb | 1375 | new_glyph_pool (void) |
5f5c8ee5 GM |
1376 | { |
1377 | struct glyph_pool *result; | |
1378 | ||
1379 | /* Allocate a new glyph_pool and clear it. */ | |
1380 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1381 | memset (result, 0, sizeof *result); |
177c0ea7 | 1382 | |
5f5c8ee5 GM |
1383 | /* For memory leak and double deletion checking. */ |
1384 | ++glyph_pool_count; | |
177c0ea7 | 1385 | |
5f5c8ee5 GM |
1386 | return result; |
1387 | } | |
1388 | ||
1389 | ||
1390 | /* Free a glyph_pool structure POOL. The function may be called with | |
1391 | a null POOL pointer. The global variable glyph_pool_count is | |
1392 | decremented with every pool structure freed. If this count gets | |
1393 | negative, more structures were freed than allocated, i.e. one | |
1394 | structure must have been freed more than once or a bogus pointer | |
1395 | was passed to free_glyph_pool. */ | |
1396 | ||
1397 | static void | |
971de7fb | 1398 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1399 | { |
1400 | if (pool) | |
1401 | { | |
153a073c | 1402 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1403 | --glyph_pool_count; |
1404 | xassert (glyph_pool_count >= 0); | |
1405 | ||
1406 | xfree (pool->glyphs); | |
1407 | xfree (pool); | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | ||
1412 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1413 | columns we need. This function never shrinks a pool. The only | |
1414 | case in which this would make sense, would be when a frame's size | |
1415 | is changed from a large value to a smaller one. But, if someone | |
1416 | does it once, we can expect that he will do it again. | |
1417 | ||
1418 | Value is non-zero if the pool changed in a way which makes | |
1419 | re-adjusting window glyph matrices necessary. */ | |
1420 | ||
1421 | static int | |
971de7fb | 1422 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1423 | { |
ca9ce8f2 | 1424 | ptrdiff_t needed; |
5f5c8ee5 GM |
1425 | int changed_p; |
1426 | ||
1427 | changed_p = (pool->glyphs == 0 | |
1428 | || matrix_dim.height != pool->nrows | |
1429 | || matrix_dim.width != pool->ncolumns); | |
1430 | ||
1431 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1432 | needed = matrix_dim.width; |
0065d054 PE |
1433 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1434 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1435 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1436 | if (needed > pool->nglyphs) |
1437 | { | |
0065d054 PE |
1438 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1439 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1440 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1441 | memset (pool->glyphs + old_nglyphs, 0, | |
1442 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1443 | } |
1444 | ||
153a073c | 1445 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1446 | to do sanity checks, and (b) the number of columns determines |
1447 | where rows in the frame matrix start---this must be available to | |
1448 | determine pointers to rows of window sub-matrices. */ | |
1449 | pool->nrows = matrix_dim.height; | |
1450 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1451 | |
5f5c8ee5 GM |
1452 | return changed_p; |
1453 | } | |
1454 | ||
1455 | ||
1456 | \f | |
1457 | /*********************************************************************** | |
1458 | Debug Code | |
1459 | ***********************************************************************/ | |
1460 | ||
1461 | #if GLYPH_DEBUG | |
1462 | ||
a13396c9 | 1463 | |
28d440ab KL |
1464 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1465 | XXX Maybe this should be changed to flush the current terminal instead of | |
1466 | stdout. | |
1467 | */ | |
a13396c9 | 1468 | |
85fece3e PE |
1469 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1470 | ||
a13396c9 | 1471 | void |
59fc5cf9 | 1472 | flush_stdout (void) |
a13396c9 GM |
1473 | { |
1474 | fflush (stdout); | |
1475 | } | |
1476 | ||
1477 | ||
5f5c8ee5 GM |
1478 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1479 | pointer has been lost, e.g. by using a structure assignment between | |
1480 | rows, at least one pointer must occur more than once in the rows of | |
1481 | MATRIX. */ | |
1482 | ||
1483 | void | |
59fc5cf9 | 1484 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1485 | { |
1486 | int i, j; | |
177c0ea7 | 1487 | |
5f5c8ee5 GM |
1488 | for (i = 0; i < matrix->nrows; ++i) |
1489 | for (j = 0; j < matrix->nrows; ++j) | |
1490 | xassert (i == j | |
1491 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1492 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1493 | } | |
1494 | ||
1495 | ||
1496 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1497 | ||
1498 | struct glyph_row * | |
59fc5cf9 | 1499 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 GM |
1500 | { |
1501 | xassert (matrix && matrix->rows); | |
1502 | xassert (row >= 0 && row < matrix->nrows); | |
1503 | ||
1504 | /* That's really too slow for normal testing because this function | |
1505 | is called almost everywhere. Although---it's still astonishingly | |
1506 | fast, so it is valuable to have for debugging purposes. */ | |
1507 | #if 0 | |
1508 | check_matrix_pointer_lossage (matrix); | |
1509 | #endif | |
177c0ea7 | 1510 | |
5f5c8ee5 GM |
1511 | return matrix->rows + row; |
1512 | } | |
1513 | ||
1514 | ||
1515 | #if 0 /* This function makes invalid assumptions when text is | |
1516 | partially invisible. But it might come handy for debugging | |
1517 | nevertheless. */ | |
1518 | ||
1519 | /* Check invariants that must hold for an up to date current matrix of | |
1520 | window W. */ | |
1521 | ||
1522 | static void | |
59fc5cf9 | 1523 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1524 | { |
1525 | struct glyph_matrix *matrix = w->current_matrix; | |
1526 | int yb = window_text_bottom_y (w); | |
1527 | struct glyph_row *row = matrix->rows; | |
1528 | struct glyph_row *last_text_row = NULL; | |
1529 | struct buffer *saved = current_buffer; | |
1530 | struct buffer *buffer = XBUFFER (w->buffer); | |
1531 | int c; | |
177c0ea7 | 1532 | |
5f5c8ee5 GM |
1533 | /* This can sometimes happen for a fresh window. */ |
1534 | if (matrix->nrows < 2) | |
1535 | return; | |
1536 | ||
1537 | set_buffer_temp (buffer); | |
1538 | ||
1539 | /* Note: last row is always reserved for the mode line. */ | |
1540 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1541 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1542 | { | |
1543 | struct glyph_row *next = row + 1; | |
1544 | ||
1545 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1546 | last_text_row = row; | |
1547 | ||
1548 | /* Check that character and byte positions are in sync. */ | |
1549 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1550 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1551 | xassert (BYTEPOS (row->start.pos) |
1552 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1553 | |
1554 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1555 | have such a position temporarily in case of a minibuffer | |
1556 | displaying something like `[Sole completion]' at its end. */ | |
1557 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1558 | { |
1559 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1560 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1561 | xassert (BYTEPOS (row->end.pos) | |
1562 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1563 | } | |
5f5c8ee5 GM |
1564 | |
1565 | /* Check that end position of `row' is equal to start position | |
1566 | of next row. */ | |
1567 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1568 | { | |
1569 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1570 | == MATRIX_ROW_START_CHARPOS (next)); | |
1571 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1572 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1573 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1574 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1575 | } |
1576 | row = next; | |
1577 | } | |
1578 | ||
1579 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1580 | xassert (w->desired_matrix->rows != NULL); | |
1581 | set_buffer_temp (saved); | |
1582 | } | |
1583 | ||
1584 | #endif /* 0 */ | |
1585 | ||
1586 | #endif /* GLYPH_DEBUG != 0 */ | |
1587 | ||
1588 | ||
1589 | \f | |
1590 | /********************************************************************** | |
1591 | Allocating/ Adjusting Glyph Matrices | |
1592 | **********************************************************************/ | |
1593 | ||
1594 | /* Allocate glyph matrices over a window tree for a frame-based | |
1595 | redisplay | |
1596 | ||
1597 | X and Y are column/row within the frame glyph matrix where | |
1598 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1599 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1600 | function is only interested in the result matrix dimension, and | |
1601 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1602 | |
1603 | The function returns the total width/height of the sub-matrices of | |
1604 | the window tree. If called on a frame root window, the computation | |
1605 | will take the mini-buffer window into account. | |
1606 | ||
1607 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1608 | ||
1609 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1610 | glyph matrices yet, and | |
1611 | ||
1612 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1613 | any window in the tree will be changed or have been changed (see | |
153a073c | 1614 | DIM_ONLY_P) |
5f5c8ee5 GM |
1615 | |
1616 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1617 | function. | |
1618 | ||
1619 | Windows are arranged into chains of windows on the same level | |
1620 | through the next fields of window structures. Such a level can be | |
1621 | either a sequence of horizontally adjacent windows from left to | |
1622 | right, or a sequence of vertically adjacent windows from top to | |
1623 | bottom. Each window in a horizontal sequence can be either a leaf | |
1624 | window or a vertical sequence; a window in a vertical sequence can | |
1625 | be either a leaf or a horizontal sequence. All windows in a | |
1626 | horizontal sequence have the same height, and all windows in a | |
1627 | vertical sequence have the same width. | |
1628 | ||
1629 | This function uses, for historical reasons, a more general | |
1630 | algorithm to determine glyph matrix dimensions that would be | |
1631 | necessary. | |
1632 | ||
1633 | The matrix height of a horizontal sequence is determined by the | |
1634 | maximum height of any matrix in the sequence. The matrix width of | |
1635 | a horizontal sequence is computed by adding up matrix widths of | |
1636 | windows in the sequence. | |
1637 | ||
1638 | |<------- result width ------->| | |
1639 | +---------+----------+---------+ --- | |
1640 | | | | | | | |
1641 | | | | | | |
1642 | +---------+ | | result height | |
1643 | | +---------+ | |
1644 | | | | | |
1645 | +----------+ --- | |
1646 | ||
1647 | The matrix width of a vertical sequence is the maximum matrix width | |
1648 | of any window in the sequence. Its height is computed by adding up | |
1649 | matrix heights of windows in the sequence. | |
1650 | ||
1651 | |<---- result width -->| | |
1652 | +---------+ --- | |
1653 | | | | | |
1654 | | | | | |
1655 | +---------+--+ | | |
1656 | | | | | |
1657 | | | result height | |
1658 | | | | |
1659 | +------------+---------+ | | |
1660 | | | | | |
1661 | | | | | |
1662 | +------------+---------+ --- */ | |
1663 | ||
1664 | /* Bit indicating that a new matrix will be allocated or has been | |
1665 | allocated. */ | |
1666 | ||
1667 | #define NEW_LEAF_MATRIX (1 << 0) | |
1668 | ||
1669 | /* Bit indicating that a matrix will or has changed its location or | |
1670 | size. */ | |
1671 | ||
1672 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1673 | ||
1674 | static struct dim | |
6f704c76 DN |
1675 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1676 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1677 | { |
1678 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1679 | int x0 = x, y0 = y; | |
1680 | int wmax = 0, hmax = 0; | |
1681 | struct dim total; | |
1682 | struct dim dim; | |
1683 | struct window *w; | |
1684 | int in_horz_combination_p; | |
1685 | ||
1686 | /* What combination is WINDOW part of? Compute this once since the | |
1687 | result is the same for all windows in the `next' chain. The | |
1688 | special case of a root window (parent equal to nil) is treated | |
1689 | like a vertical combination because a root window's `next' | |
1690 | points to the mini-buffer window, if any, which is arranged | |
1691 | vertically below other windows. */ | |
1692 | in_horz_combination_p | |
1693 | = (!NILP (XWINDOW (window)->parent) | |
1694 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1695 | ||
1696 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1697 | do |
5f5c8ee5 GM |
1698 | { |
1699 | w = XWINDOW (window); | |
1700 | ||
1701 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1702 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1703 | if (!NILP (w->hchild)) |
177c0ea7 | 1704 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1705 | dim_only_p, |
1706 | window_change_flags); | |
1707 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1708 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1709 | dim_only_p, |
1710 | window_change_flags); | |
1711 | else | |
1712 | { | |
1713 | /* If not already done, allocate sub-matrix structures. */ | |
1714 | if (w->desired_matrix == NULL) | |
1715 | { | |
1716 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1717 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1718 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1719 | } | |
177c0ea7 | 1720 | |
5f5c8ee5 GM |
1721 | /* Width and height MUST be chosen so that there are no |
1722 | holes in the frame matrix. */ | |
5d3cc43c GM |
1723 | dim.width = required_matrix_width (w); |
1724 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1725 | |
1726 | /* Will matrix be re-allocated? */ | |
1727 | if (x != w->desired_matrix->matrix_x | |
1728 | || y != w->desired_matrix->matrix_y | |
1729 | || dim.width != w->desired_matrix->matrix_w | |
1730 | || dim.height != w->desired_matrix->matrix_h | |
1731 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1732 | w->left_margin_cols) |
5f5c8ee5 GM |
1733 | != w->desired_matrix->left_margin_glyphs) |
1734 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1735 | w->right_margin_cols) |
5f5c8ee5 GM |
1736 | != w->desired_matrix->right_margin_glyphs)) |
1737 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1738 | ||
1739 | /* Actually change matrices, if allowed. Do not consider | |
1740 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1741 | may have been changed which we don't now here. We trust | |
1742 | that we only will be called with DIM_ONLY_P != 0 when | |
1743 | necessary. */ | |
1744 | if (!dim_only_p) | |
1745 | { | |
1746 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1747 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | /* If we are part of a horizontal combination, advance x for | |
1752 | windows to the right of W; otherwise advance y for windows | |
1753 | below W. */ | |
1754 | if (in_horz_combination_p) | |
1755 | x += dim.width; | |
177c0ea7 | 1756 | else |
5f5c8ee5 GM |
1757 | y += dim.height; |
1758 | ||
1759 | /* Remember maximum glyph matrix dimensions. */ | |
1760 | wmax = max (wmax, dim.width); | |
1761 | hmax = max (hmax, dim.height); | |
1762 | ||
1763 | /* Next window on same level. */ | |
1764 | window = w->next; | |
1765 | } | |
1766 | while (!NILP (window)); | |
1767 | ||
1768 | /* Set `total' to the total glyph matrix dimension of this window | |
1769 | level. In a vertical combination, the width is the width of the | |
1770 | widest window; the height is the y we finally reached, corrected | |
1771 | by the y we started with. In a horizontal combination, the total | |
1772 | height is the height of the tallest window, and the width is the | |
1773 | x we finally reached, corrected by the x we started with. */ | |
1774 | if (in_horz_combination_p) | |
1775 | { | |
1776 | total.width = x - x0; | |
1777 | total.height = hmax; | |
1778 | } | |
177c0ea7 | 1779 | else |
5f5c8ee5 GM |
1780 | { |
1781 | total.width = wmax; | |
1782 | total.height = y - y0; | |
1783 | } | |
1784 | ||
1785 | return total; | |
1786 | } | |
1787 | ||
1788 | ||
5d3cc43c GM |
1789 | /* Return the required height of glyph matrices for window W. */ |
1790 | ||
2f7c71a1 | 1791 | static int |
971de7fb | 1792 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1793 | { |
1794 | #ifdef HAVE_WINDOW_SYSTEM | |
1795 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1796 | |
5d3cc43c GM |
1797 | if (FRAME_WINDOW_P (f)) |
1798 | { | |
1799 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1800 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1801 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1802 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1803 | /* One partially visible line at the top and |
1804 | bottom of the window. */ | |
1805 | + 2 | |
153a073c | 1806 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1807 | + 2); |
1808 | } | |
1809 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1810 | |
7df02016 | 1811 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1812 | } |
1813 | ||
1814 | ||
1815 | /* Return the required width of glyph matrices for window W. */ | |
1816 | ||
2f7c71a1 | 1817 | static int |
971de7fb | 1818 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1819 | { |
1820 | #ifdef HAVE_WINDOW_SYSTEM | |
1821 | struct frame *f = XFRAME (w->frame); | |
1822 | if (FRAME_WINDOW_P (f)) | |
1823 | { | |
1824 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1825 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1826 | |
5d3cc43c GM |
1827 | /* Compute number of glyphs needed in a glyph row. */ |
1828 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1829 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1830 | /* 2 partially visible columns in the text area. */ |
1831 | + 2 | |
1832 | /* One partially visible column at the right | |
1833 | edge of each marginal area. */ | |
1834 | + 1 + 1); | |
1835 | } | |
1836 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1837 | ||
7df02016 | 1838 | return XINT (w->total_cols); |
5d3cc43c GM |
1839 | } |
1840 | ||
1841 | ||
5f5c8ee5 | 1842 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1843 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1844 | |
5f5c8ee5 | 1845 | static void |
971de7fb | 1846 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1847 | { |
5f5c8ee5 GM |
1848 | while (w) |
1849 | { | |
1850 | if (!NILP (w->vchild)) | |
5d3cc43c | 1851 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1852 | else if (!NILP (w->hchild)) |
5d3cc43c | 1853 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1854 | else |
1855 | { | |
1856 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1857 | struct dim dim; |
1858 | ||
1859 | /* If matrices are not yet allocated, allocate them now. */ | |
1860 | if (w->desired_matrix == NULL) | |
1861 | { | |
1862 | w->desired_matrix = new_glyph_matrix (NULL); | |
1863 | w->current_matrix = new_glyph_matrix (NULL); | |
1864 | } | |
1865 | ||
5d3cc43c GM |
1866 | dim.width = required_matrix_width (w); |
1867 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1868 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1869 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1870 | } | |
177c0ea7 | 1871 | |
5f5c8ee5 GM |
1872 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1873 | } | |
1874 | } | |
1875 | ||
1876 | ||
1877 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1878 | do it for all frames; otherwise do it just for the given frame. | |
1879 | This function must be called when a new frame is created, its size | |
1880 | changes, or its window configuration changes. */ | |
1881 | ||
1882 | void | |
971de7fb | 1883 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1884 | { |
408f5064 GM |
1885 | /* Block input so that expose events and other events that access |
1886 | glyph matrices are not processed while we are changing them. */ | |
1887 | BLOCK_INPUT; | |
1888 | ||
5f5c8ee5 GM |
1889 | if (f) |
1890 | adjust_frame_glyphs (f); | |
1891 | else | |
1892 | { | |
1893 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1894 | |
5f5c8ee5 GM |
1895 | FOR_EACH_FRAME (tail, lisp_frame) |
1896 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1897 | } | |
408f5064 GM |
1898 | |
1899 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1900 | } |
1901 | ||
1902 | ||
1903 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1904 | |
1905 | To be called from init_display. | |
1906 | ||
5f5c8ee5 GM |
1907 | We need a glyph matrix because redraw will happen soon. |
1908 | Unfortunately, window sizes on selected_frame are not yet set to | |
1909 | meaningful values. I believe we can assume that there are only two | |
1910 | windows on the frame---the mini-buffer and the root window. Frame | |
1911 | height and width seem to be correct so far. So, set the sizes of | |
1912 | windows to estimated values. */ | |
1913 | ||
1914 | static void | |
971de7fb | 1915 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1916 | { |
91fb7e1b GM |
1917 | struct frame *sf = SELECTED_FRAME (); |
1918 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1919 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1920 | int frame_lines = FRAME_LINES (sf); |
1921 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1922 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1923 | |
1924 | /* Do it for the root window. */ | |
7df02016 | 1925 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1926 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1927 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1928 | |
1929 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1930 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1931 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1932 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 1933 | |
91fb7e1b | 1934 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1935 | glyphs_initialized_initially_p = 1; |
1936 | } | |
177c0ea7 | 1937 | |
5f5c8ee5 GM |
1938 | |
1939 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1940 | ||
1941 | static void | |
971de7fb | 1942 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1943 | { |
1944 | if (FRAME_WINDOW_P (f)) | |
1945 | adjust_frame_glyphs_for_window_redisplay (f); | |
1946 | else | |
1947 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1948 | |
5f5c8ee5 GM |
1949 | /* Don't forget the message buffer and the buffer for |
1950 | decode_mode_spec. */ | |
1951 | adjust_frame_message_buffer (f); | |
1952 | adjust_decode_mode_spec_buffer (f); | |
1953 | ||
1954 | f->glyphs_initialized_p = 1; | |
1955 | } | |
1956 | ||
075757cc CY |
1957 | /* Return 1 if any window in the tree has nonzero window margins. See |
1958 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1959 | static int | |
971de7fb | 1960 | showing_window_margins_p (struct window *w) |
075757cc CY |
1961 | { |
1962 | while (w) | |
1963 | { | |
1964 | if (!NILP (w->hchild)) | |
1965 | { | |
1966 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1967 | return 1; | |
1968 | } | |
1969 | else if (!NILP (w->vchild)) | |
1970 | { | |
1971 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1972 | return 1; | |
1973 | } | |
1974 | else if (!NILP (w->left_margin_cols) | |
1975 | || !NILP (w->right_margin_cols)) | |
1976 | return 1; | |
3fc809e2 | 1977 | |
075757cc CY |
1978 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1979 | } | |
1980 | return 0; | |
1981 | } | |
1982 | ||
5f5c8ee5 | 1983 | |
c9f00270 GM |
1984 | /* In the window tree with root W, build current matrices of leaf |
1985 | windows from the frame's current matrix. */ | |
1986 | ||
1987 | static void | |
971de7fb | 1988 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1989 | { |
1990 | struct window *w; | |
177c0ea7 | 1991 | |
c9f00270 GM |
1992 | for (; !NILP (window); window = w->next) |
1993 | { | |
1994 | w = XWINDOW (window); | |
177c0ea7 | 1995 | |
c9f00270 GM |
1996 | if (!NILP (w->hchild)) |
1997 | fake_current_matrices (w->hchild); | |
1998 | else if (!NILP (w->vchild)) | |
1999 | fake_current_matrices (w->vchild); | |
2000 | else | |
2001 | { | |
2002 | int i; | |
2003 | struct frame *f = XFRAME (w->frame); | |
2004 | struct glyph_matrix *m = w->current_matrix; | |
2005 | struct glyph_matrix *fm = f->current_matrix; | |
2006 | ||
7df02016 KS |
2007 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2008 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2009 | |
c9f00270 GM |
2010 | for (i = 0; i < m->matrix_h; ++i) |
2011 | { | |
2012 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2013 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2014 | |
2015 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2016 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2017 | ||
2018 | r->enabled_p = fr->enabled_p; | |
2019 | if (r->enabled_p) | |
2020 | { | |
2021 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2022 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2023 | r->used[TEXT_AREA] = (m->matrix_w | |
2024 | - r->used[LEFT_MARGIN_AREA] | |
2025 | - r->used[RIGHT_MARGIN_AREA]); | |
2026 | r->mode_line_p = 0; | |
c9f00270 GM |
2027 | } |
2028 | } | |
2029 | } | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | ||
bccee4f2 | 2034 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2035 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2036 | |
bccee4f2 | 2037 | static struct glyph_matrix * |
971de7fb | 2038 | save_current_matrix (struct frame *f) |
c9f00270 | 2039 | { |
bccee4f2 GM |
2040 | int i; |
2041 | struct glyph_matrix *saved; | |
e797dea6 | 2042 | |
bccee4f2 | 2043 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2044 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2045 | saved->nrows = f->current_matrix->nrows; |
2046 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2047 | * sizeof *saved->rows); | |
72af86bd | 2048 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2049 | |
2050 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2051 | { |
bccee4f2 GM |
2052 | struct glyph_row *from = f->current_matrix->rows + i; |
2053 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2054 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
bccee4f2 | 2055 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); |
72af86bd | 2056 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2057 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2058 | } |
bccee4f2 GM |
2059 | |
2060 | return saved; | |
2061 | } | |
2062 | ||
2063 | ||
2064 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2065 | and free memory associated with SAVED. */ | |
2066 | ||
2067 | static void | |
971de7fb | 2068 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2069 | { |
2070 | int i; | |
2071 | ||
2072 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2073 | { |
bccee4f2 GM |
2074 | struct glyph_row *from = saved->rows + i; |
2075 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2076 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2077 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2078 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2079 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2080 | } |
177c0ea7 | 2081 | |
bccee4f2 GM |
2082 | xfree (saved->rows); |
2083 | xfree (saved); | |
c9f00270 GM |
2084 | } |
2085 | ||
2086 | ||
bccee4f2 | 2087 | |
5f5c8ee5 GM |
2088 | /* Allocate/reallocate glyph matrices of a single frame F for |
2089 | frame-based redisplay. */ | |
2090 | ||
2091 | static void | |
971de7fb | 2092 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2093 | { |
5f5c8ee5 GM |
2094 | struct dim matrix_dim; |
2095 | int pool_changed_p; | |
2096 | int window_change_flags; | |
2097 | int top_window_y; | |
2098 | ||
2099 | if (!FRAME_LIVE_P (f)) | |
2100 | return; | |
2101 | ||
5f5c8ee5 GM |
2102 | top_window_y = FRAME_TOP_MARGIN (f); |
2103 | ||
2104 | /* Allocate glyph pool structures if not already done. */ | |
2105 | if (f->desired_pool == NULL) | |
2106 | { | |
2107 | f->desired_pool = new_glyph_pool (); | |
2108 | f->current_pool = new_glyph_pool (); | |
2109 | } | |
2110 | ||
2111 | /* Allocate frames matrix structures if needed. */ | |
2112 | if (f->desired_matrix == NULL) | |
2113 | { | |
2114 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2115 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2116 | } | |
177c0ea7 | 2117 | |
5f5c8ee5 GM |
2118 | /* Compute window glyph matrices. (This takes the mini-buffer |
2119 | window into account). The result is the size of the frame glyph | |
2120 | matrix needed. The variable window_change_flags is set to a bit | |
2121 | mask indicating whether new matrices will be allocated or | |
2122 | existing matrices change their size or location within the frame | |
2123 | matrix. */ | |
2124 | window_change_flags = 0; | |
2125 | matrix_dim | |
2126 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2127 | 0, top_window_y, | |
5d3cc43c | 2128 | 1, |
5f5c8ee5 GM |
2129 | &window_change_flags); |
2130 | ||
2131 | /* Add in menu bar lines, if any. */ | |
2132 | matrix_dim.height += top_window_y; | |
2133 | ||
2134 | /* Enlarge pools as necessary. */ | |
2135 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2136 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2137 | ||
177c0ea7 | 2138 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2139 | absolutely necessary since it requires a frame redraw. */ |
2140 | if (pool_changed_p || window_change_flags) | |
2141 | { | |
2142 | /* Do it for window matrices. */ | |
2143 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2144 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2145 | &window_change_flags); |
2146 | ||
2147 | /* Size of frame matrices must equal size of frame. Note | |
2148 | that we are called for X frames with window widths NOT equal | |
2149 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2150 | xassert (matrix_dim.width == FRAME_COLS (f) |
2151 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2152 | |
e797dea6 GM |
2153 | /* Pointers to glyph memory in glyph rows are exchanged during |
2154 | the update phase of redisplay, which means in general that a | |
2155 | frame's current matrix consists of pointers into both the | |
2156 | desired and current glyph pool of the frame. Adjusting a | |
2157 | matrix sets the frame matrix up so that pointers are all into | |
2158 | the same pool. If we want to preserve glyph contents of the | |
2159 | current matrix over a call to adjust_glyph_matrix, we must | |
2160 | make a copy of the current glyphs, and restore the current | |
2161 | matrix' contents from that copy. */ | |
2162 | if (display_completed | |
2163 | && !FRAME_GARBAGED_P (f) | |
2164 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2165 | && matrix_dim.height == f->current_matrix->matrix_h |
2166 | /* For some reason, the frame glyph matrix gets corrupted if | |
2167 | any of the windows contain margins. I haven't been able | |
2168 | to hunt down the reason, but for the moment this prevents | |
2169 | the problem from manifesting. -- cyd */ | |
2170 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2171 | { |
bccee4f2 GM |
2172 | struct glyph_matrix *copy = save_current_matrix (f); |
2173 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2174 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2175 | restore_current_matrix (f, copy); |
e797dea6 GM |
2176 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2177 | } | |
c9f00270 | 2178 | else |
e797dea6 | 2179 | { |
bccee4f2 | 2180 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2181 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2182 | SET_FRAME_GARBAGED (f); | |
2183 | } | |
5f5c8ee5 GM |
2184 | } |
2185 | } | |
2186 | ||
2187 | ||
2188 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2189 | window-based redisplay. */ | |
2190 | ||
2191 | static void | |
971de7fb | 2192 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2193 | { |
5f5c8ee5 | 2194 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2195 | |
5f5c8ee5 | 2196 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2197 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2198 | |
8ce2650d | 2199 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2200 | /* Allocate/ reallocate matrices of the dummy window used to display |
2201 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2202 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2203 | { |
2204 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2205 | struct window *w; |
5f5c8ee5 GM |
2206 | if (NILP (f->menu_bar_window)) |
2207 | { | |
2208 | f->menu_bar_window = make_window (); | |
2209 | w = XWINDOW (f->menu_bar_window); | |
2210 | XSETFRAME (w->frame, f); | |
2211 | w->pseudo_window_p = 1; | |
2212 | } | |
2213 | else | |
2214 | w = XWINDOW (f->menu_bar_window); | |
2215 | ||
2216 | /* Set window dimensions to frame dimensions and allocate or | |
2217 | adjust glyph matrices of W. */ | |
7df02016 KS |
2218 | XSETFASTINT (w->top_line, 0); |
2219 | XSETFASTINT (w->left_col, 0); | |
2220 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2221 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2222 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2223 | } |
57714a86 YM |
2224 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2225 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2226 | |
488dd4c4 | 2227 | #ifndef USE_GTK |
d2d37ddc PE |
2228 | { |
2229 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2230 | don't have a tool bar window yet, make one. */ | |
2231 | struct window *w; | |
2232 | if (NILP (f->tool_bar_window)) | |
2233 | { | |
2234 | f->tool_bar_window = make_window (); | |
2235 | w = XWINDOW (f->tool_bar_window); | |
2236 | XSETFRAME (w->frame, f); | |
2237 | w->pseudo_window_p = 1; | |
2238 | } | |
2239 | else | |
9ea173e8 | 2240 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2241 | |
d2d37ddc PE |
2242 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2243 | XSETFASTINT (w->left_col, 0); | |
2244 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2245 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2246 | allocate_matrices_for_window_redisplay (w); | |
2247 | } | |
488dd4c4 | 2248 | #endif |
5f5c8ee5 GM |
2249 | } |
2250 | ||
2251 | ||
177c0ea7 | 2252 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2253 | |
5f5c8ee5 GM |
2254 | Note that the message buffer is never freed. Since I could not |
2255 | find a free in 19.34, I assume that freeing it would be | |
2256 | problematic in some way and don't do it either. | |
2257 | ||
2258 | (Implementation note: It should be checked if we can free it | |
2259 | eventually without causing trouble). */ | |
2260 | ||
2261 | static void | |
971de7fb | 2262 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2263 | { |
dfd153ae | 2264 | ptrdiff_t size = FRAME_MESSAGE_BUF_SIZE (f) + 1; |
5f5c8ee5 GM |
2265 | |
2266 | if (FRAME_MESSAGE_BUF (f)) | |
2267 | { | |
2268 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2269 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2270 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2271 | } | |
2272 | else | |
2273 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2274 | } | |
2275 | ||
2276 | ||
2277 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2278 | ||
2279 | static void | |
971de7fb | 2280 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2281 | { |
2282 | f->decode_mode_spec_buffer | |
2283 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2284 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2285 | } | |
2286 | ||
2287 | ||
2288 | \f | |
2289 | /********************************************************************** | |
2290 | Freeing Glyph Matrices | |
2291 | **********************************************************************/ | |
2292 | ||
2293 | /* Free glyph memory for a frame F. F may be null. This function can | |
2294 | be called for the same frame more than once. The root window of | |
2295 | F may be nil when this function is called. This is the case when | |
2296 | the function is called when F is destroyed. */ | |
2297 | ||
2298 | void | |
971de7fb | 2299 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2300 | { |
2301 | if (f && f->glyphs_initialized_p) | |
2302 | { | |
42f55fe0 GM |
2303 | /* Block interrupt input so that we don't get surprised by an X |
2304 | event while we're in an inconsistent state. */ | |
2305 | BLOCK_INPUT; | |
5f5c8ee5 | 2306 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2307 | |
5f5c8ee5 GM |
2308 | /* Release window sub-matrices. */ |
2309 | if (!NILP (f->root_window)) | |
2310 | free_window_matrices (XWINDOW (f->root_window)); | |
2311 | ||
2312 | /* Free the dummy window for menu bars without X toolkit and its | |
2313 | glyph matrices. */ | |
2314 | if (!NILP (f->menu_bar_window)) | |
2315 | { | |
2316 | struct window *w = XWINDOW (f->menu_bar_window); | |
2317 | free_glyph_matrix (w->desired_matrix); | |
2318 | free_glyph_matrix (w->current_matrix); | |
2319 | w->desired_matrix = w->current_matrix = NULL; | |
2320 | f->menu_bar_window = Qnil; | |
2321 | } | |
2322 | ||
9ea173e8 GM |
2323 | /* Free the tool bar window and its glyph matrices. */ |
2324 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2325 | { |
9ea173e8 | 2326 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2327 | free_glyph_matrix (w->desired_matrix); |
2328 | free_glyph_matrix (w->current_matrix); | |
2329 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2330 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2331 | } |
2332 | ||
2333 | /* Release frame glyph matrices. Reset fields to zero in | |
2334 | case we are called a second time. */ | |
2335 | if (f->desired_matrix) | |
2336 | { | |
2337 | free_glyph_matrix (f->desired_matrix); | |
2338 | free_glyph_matrix (f->current_matrix); | |
2339 | f->desired_matrix = f->current_matrix = NULL; | |
2340 | } | |
2341 | ||
2342 | /* Release glyph pools. */ | |
2343 | if (f->desired_pool) | |
2344 | { | |
2345 | free_glyph_pool (f->desired_pool); | |
2346 | free_glyph_pool (f->current_pool); | |
2347 | f->desired_pool = f->current_pool = NULL; | |
2348 | } | |
177c0ea7 | 2349 | |
42f55fe0 | 2350 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2351 | } |
2352 | } | |
2353 | ||
2354 | ||
2355 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2356 | function may be called with a null pointer, and it may be called on | |
2357 | the same tree more than once. */ | |
2358 | ||
2359 | void | |
971de7fb | 2360 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2361 | { |
2362 | while (w) | |
2363 | { | |
2364 | if (!NILP (w->hchild)) | |
2365 | free_window_matrices (XWINDOW (w->hchild)); | |
2366 | else if (!NILP (w->vchild)) | |
2367 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2368 | else |
5f5c8ee5 GM |
2369 | { |
2370 | /* This is a leaf window. Free its memory and reset fields | |
2371 | to zero in case this function is called a second time for | |
2372 | W. */ | |
2373 | free_glyph_matrix (w->current_matrix); | |
2374 | free_glyph_matrix (w->desired_matrix); | |
2375 | w->current_matrix = w->desired_matrix = NULL; | |
2376 | } | |
2377 | ||
2378 | /* Next window on same level. */ | |
2379 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2380 | } | |
2381 | } | |
2382 | ||
2383 | ||
2384 | /* Check glyph memory leaks. This function is called from | |
2385 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2386 | exits. We therefore free all glyph memory for all active frames | |
2387 | explicitly and check that nothing is left allocated. */ | |
2388 | ||
2389 | void | |
971de7fb | 2390 | check_glyph_memory (void) |
5f5c8ee5 GM |
2391 | { |
2392 | Lisp_Object tail, frame; | |
2393 | ||
2394 | /* Free glyph memory for all frames. */ | |
2395 | FOR_EACH_FRAME (tail, frame) | |
2396 | free_glyphs (XFRAME (frame)); | |
2397 | ||
2398 | /* Check that nothing is left allocated. */ | |
2399 | if (glyph_matrix_count) | |
2400 | abort (); | |
2401 | if (glyph_pool_count) | |
2402 | abort (); | |
2403 | } | |
2404 | ||
2405 | ||
2406 | \f | |
2407 | /********************************************************************** | |
2408 | Building a Frame Matrix | |
2409 | **********************************************************************/ | |
2410 | ||
2411 | /* Most of the redisplay code works on glyph matrices attached to | |
2412 | windows. This is a good solution most of the time, but it is not | |
2413 | suitable for terminal code. Terminal output functions cannot rely | |
2414 | on being able to set an arbitrary terminal window. Instead they | |
2415 | must be provided with a view of the whole frame, i.e. the whole | |
2416 | screen. We build such a view by constructing a frame matrix from | |
2417 | window matrices in this section. | |
2418 | ||
2419 | Windows that must be updated have their must_be_update_p flag set. | |
2420 | For all such windows, their desired matrix is made part of the | |
2421 | desired frame matrix. For other windows, their current matrix is | |
2422 | made part of the desired frame matrix. | |
2423 | ||
2424 | +-----------------+----------------+ | |
2425 | | desired | desired | | |
2426 | | | | | |
2427 | +-----------------+----------------+ | |
2428 | | current | | |
2429 | | | | |
2430 | +----------------------------------+ | |
2431 | ||
2432 | Desired window matrices can be made part of the frame matrix in a | |
2433 | cheap way: We exploit the fact that the desired frame matrix and | |
2434 | desired window matrices share their glyph memory. This is not | |
2435 | possible for current window matrices. Their glyphs are copied to | |
2436 | the desired frame matrix. The latter is equivalent to | |
2437 | preserve_other_columns in the old redisplay. | |
2438 | ||
2439 | Used glyphs counters for frame matrix rows are the result of adding | |
2440 | up glyph lengths of the window matrices. A line in the frame | |
2441 | matrix is enabled, if a corresponding line in a window matrix is | |
2442 | enabled. | |
177c0ea7 | 2443 | |
5f5c8ee5 GM |
2444 | After building the desired frame matrix, it will be passed to |
2445 | terminal code, which will manipulate both the desired and current | |
2446 | frame matrix. Changes applied to the frame's current matrix have | |
2447 | to be visible in current window matrices afterwards, of course. | |
2448 | ||
2449 | This problem is solved like this: | |
2450 | ||
2451 | 1. Window and frame matrices share glyphs. Window matrices are | |
2452 | constructed in a way that their glyph contents ARE the glyph | |
2453 | contents needed in a frame matrix. Thus, any modification of | |
2454 | glyphs done in terminal code will be reflected in window matrices | |
2455 | automatically. | |
177c0ea7 | 2456 | |
5f5c8ee5 GM |
2457 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2458 | intercepted by hook functions so that corresponding row operations | |
2459 | on window matrices can be performed. This is necessary because we | |
2460 | use pointers to glyphs in glyph row structures. To satisfy the | |
2461 | assumption of point 1 above that glyphs are updated implicitly in | |
2462 | window matrices when they are manipulated via the frame matrix, | |
2463 | window and frame matrix must of course agree where to find the | |
2464 | glyphs for their rows. Possible manipulations that must be | |
2465 | mirrored are assignments of rows of the desired frame matrix to the | |
2466 | current frame matrix and scrolling the current frame matrix. */ | |
2467 | ||
2468 | /* Build frame F's desired matrix from window matrices. Only windows | |
2469 | which have the flag must_be_updated_p set have to be updated. Menu | |
2470 | bar lines of a frame are not covered by window matrices, so make | |
2471 | sure not to touch them in this function. */ | |
2472 | ||
2473 | static void | |
971de7fb | 2474 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2475 | { |
2476 | int i; | |
2477 | ||
2478 | /* F must have a frame matrix when this function is called. */ | |
2479 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2480 | |
5f5c8ee5 GM |
2481 | /* Clear all rows in the frame matrix covered by window matrices. |
2482 | Menu bar lines are not covered by windows. */ | |
2483 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2484 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2485 | ||
2486 | /* Build the matrix by walking the window tree. */ | |
2487 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2488 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2489 | } | |
2490 | ||
2491 | ||
2492 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2493 | matrices. W is the root of a window tree. */ | |
2494 | ||
2495 | static void | |
971de7fb | 2496 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2497 | { |
2498 | while (w) | |
2499 | { | |
2500 | if (!NILP (w->hchild)) | |
2501 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2502 | else if (!NILP (w->vchild)) | |
2503 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2504 | else | |
2505 | build_frame_matrix_from_leaf_window (matrix, w); | |
2506 | ||
2507 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2508 | } | |
2509 | } | |
2510 | ||
2511 | ||
2512 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2513 | desired frame matrix built. W is a leaf window whose desired or | |
2514 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2515 | must_be_updated_p determines which matrix it contributes to | |
2516 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2517 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2518 | Adding a desired matrix means setting up used counters and such in | |
2519 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2520 | means copying glyphs. The latter case corresponds to | |
2521 | preserve_other_columns in the old redisplay. */ | |
2522 | ||
2523 | static void | |
971de7fb | 2524 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2525 | { |
2526 | struct glyph_matrix *window_matrix; | |
2527 | int window_y, frame_y; | |
2528 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2529 | GLYPH right_border_glyph; |
2530 | ||
2531 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2532 | |
2533 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2534 | if (w->must_be_updated_p) | |
2535 | { | |
2536 | window_matrix = w->desired_matrix; | |
2537 | ||
2538 | /* Decide whether we want to add a vertical border glyph. */ | |
2539 | if (!WINDOW_RIGHTMOST_P (w)) | |
2540 | { | |
2541 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2542 | Lisp_Object gc; |
b4e49aee | 2543 | |
3fc809e2 KS |
2544 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2545 | if (dp | |
2546 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2547 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2548 | { | |
2549 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2550 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2551 | } | |
b4e49aee | 2552 | |
3fc809e2 KS |
2553 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2554 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2555 | } |
2556 | } | |
2557 | else | |
2558 | window_matrix = w->current_matrix; | |
2559 | ||
2560 | /* For all rows in the window matrix and corresponding rows in the | |
2561 | frame matrix. */ | |
2562 | window_y = 0; | |
2563 | frame_y = window_matrix->matrix_y; | |
2564 | while (window_y < window_matrix->nrows) | |
2565 | { | |
2566 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2567 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2568 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2569 | |
2570 | /* Fill up the frame row with spaces up to the left margin of the | |
2571 | window row. */ | |
2572 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2573 | ||
2574 | /* Fill up areas in the window matrix row with spaces. */ | |
2575 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2576 | |
2577 | /* If only part of W's desired matrix has been built, and | |
2578 | window_row wasn't displayed, use the corresponding current | |
2579 | row instead. */ | |
2580 | if (window_matrix == w->desired_matrix | |
2581 | && !window_row->enabled_p) | |
2582 | { | |
2583 | window_row = w->current_matrix->rows + window_y; | |
2584 | current_row_p = 1; | |
2585 | } | |
177c0ea7 | 2586 | |
2a8bd25f | 2587 | if (current_row_p) |
5f5c8ee5 | 2588 | { |
2a8bd25f | 2589 | /* Copy window row to frame row. */ |
72af86bd AS |
2590 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2591 | window_row->glyphs[0], | |
2592 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2593 | } |
2594 | else | |
2595 | { | |
2a8bd25f | 2596 | xassert (window_row->enabled_p); |
177c0ea7 | 2597 | |
2a8bd25f GM |
2598 | /* Only when a desired row has been displayed, we want |
2599 | the corresponding frame row to be updated. */ | |
2600 | frame_row->enabled_p = 1; | |
177c0ea7 | 2601 | |
5f5c8ee5 GM |
2602 | /* Maybe insert a vertical border between horizontally adjacent |
2603 | windows. */ | |
3fc809e2 | 2604 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2605 | { |
2606 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2607 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2608 | } | |
2609 | ||
498c08ea | 2610 | #if GLYPH_DEBUG |
a13396c9 GM |
2611 | /* Window row window_y must be a slice of frame row |
2612 | frame_y. */ | |
5f5c8ee5 | 2613 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2614 | |
5f5c8ee5 GM |
2615 | /* If rows are in sync, we don't have to copy glyphs because |
2616 | frame and window share glyphs. */ | |
177c0ea7 | 2617 | |
a38634ff | 2618 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2619 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2620 | #endif |
5f5c8ee5 GM |
2621 | } |
2622 | ||
2623 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2624 | up with spaces, and visit leaf windows from left to right it | |
2625 | can be done simply. */ | |
177c0ea7 | 2626 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2627 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2628 | ||
5f5c8ee5 GM |
2629 | /* Next row. */ |
2630 | ++window_y; | |
2631 | ++frame_y; | |
2632 | } | |
2633 | } | |
2634 | ||
5f81871e RS |
2635 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2636 | ID, return a glyph that has a realized face ID. | |
2637 | This is used for glyphs displayed specially and not part of the text; | |
2638 | for instance, vertical separators, truncation markers, etc. */ | |
2639 | ||
3fc809e2 | 2640 | void |
971de7fb | 2641 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2642 | { |
3fc809e2 | 2643 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2644 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2645 | if (lface_id > 0) | |
2646 | { | |
2647 | int face_id = merge_faces (XFRAME (w->frame), | |
2648 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2649 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2650 | } |
5f81871e | 2651 | } |
5f5c8ee5 GM |
2652 | |
2653 | /* Add spaces to a glyph row ROW in a window matrix. | |
2654 | ||
2655 | Each row has the form: | |
2656 | ||
2657 | +---------+-----------------------------+------------+ | |
2658 | | left | text | right | | |
2659 | +---------+-----------------------------+------------+ | |
2660 | ||
2661 | Left and right marginal areas are optional. This function adds | |
2662 | spaces to areas so that there are no empty holes between areas. | |
2663 | In other words: If the right area is not empty, the text area | |
2664 | is filled up with spaces up to the right area. If the text area | |
2665 | is not empty, the left area is filled up. | |
2666 | ||
2667 | To be called for frame-based redisplay, only. */ | |
2668 | ||
2669 | static void | |
971de7fb | 2670 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2671 | { |
2672 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2673 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2674 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2675 | } | |
2676 | ||
2677 | ||
2678 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2679 | frame-based redisplay only. */ | |
2680 | ||
2681 | static void | |
971de7fb | 2682 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2683 | { |
2684 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2685 | { | |
2686 | struct glyph *end = row->glyphs[area + 1]; | |
2687 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2688 | ||
2689 | while (text < end) | |
2690 | *text++ = space_glyph; | |
2691 | row->used[area] = text - row->glyphs[area]; | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | ||
2696 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2697 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2698 | ||
2699 | static void | |
971de7fb | 2700 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2701 | { |
2702 | int i = row->used[TEXT_AREA]; | |
2703 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2704 | |
5f5c8ee5 GM |
2705 | while (i < upto) |
2706 | glyph[i++] = space_glyph; | |
2707 | ||
2708 | row->used[TEXT_AREA] = i; | |
2709 | } | |
2710 | ||
2711 | ||
2712 | \f | |
2713 | /********************************************************************** | |
2714 | Mirroring operations on frame matrices in window matrices | |
2715 | **********************************************************************/ | |
2716 | ||
2717 | /* Set frame being updated via frame-based redisplay to F. This | |
2718 | function must be called before updates to make explicit that we are | |
2719 | working on frame matrices or not. */ | |
2720 | ||
55d4c1b2 | 2721 | static inline void |
971de7fb | 2722 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2723 | { |
2724 | frame_matrix_frame = f; | |
2725 | } | |
2726 | ||
2727 | ||
2728 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2729 | DESIRED_MATRIX is the desired matrix corresponding to | |
2730 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2731 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2732 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2733 | done in frame matrices, and that we have to perform analogous | |
2734 | operations in window matrices of frame_matrix_frame. */ | |
2735 | ||
55d4c1b2 | 2736 | static inline void |
971de7fb | 2737 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2738 | { |
2739 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2740 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2741 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2742 | |
2743 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2744 | between both rows, and does a structure assignment otherwise. */ | |
2745 | assign_row (current_row, desired_row); | |
2746 | ||
2747 | /* Enable current_row to mark it as valid. */ | |
2748 | current_row->enabled_p = 1; | |
e876ff42 | 2749 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2750 | |
2751 | /* If we are called on frame matrices, perform analogous operations | |
2752 | for window matrices. */ | |
2753 | if (frame_matrix_frame) | |
2754 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2755 | } | |
2756 | ||
2757 | ||
2758 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2759 | W's frame which has been made current (by swapping pointers between | |
2760 | current and desired matrix). Perform analogous operations in the | |
2761 | matrices of leaf windows in the window tree rooted at W. */ | |
2762 | ||
2763 | static void | |
971de7fb | 2764 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2765 | { |
2766 | while (w) | |
2767 | { | |
2768 | if (!NILP (w->hchild)) | |
2769 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2770 | else if (!NILP (w->vchild)) | |
2771 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2772 | else | |
2773 | { | |
2774 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2775 | here because the checks performed in debug mode there | |
2776 | will not allow the conversion. */ | |
2777 | int row = frame_row - w->desired_matrix->matrix_y; | |
2778 | ||
2779 | /* If FRAME_ROW is within W, assign the desired row to the | |
2780 | current row (exchanging glyph pointers). */ | |
2781 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2782 | { | |
2783 | struct glyph_row *current_row | |
2784 | = MATRIX_ROW (w->current_matrix, row); | |
2785 | struct glyph_row *desired_row | |
2786 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2787 | |
2788 | if (desired_row->enabled_p) | |
2789 | assign_row (current_row, desired_row); | |
2790 | else | |
2791 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2792 | current_row->enabled_p = 1; |
d009ae66 EZ |
2793 | |
2794 | /* Set the Y coordinate of the mode/header line's row. | |
2795 | It is needed in draw_row_with_mouse_face to find the | |
2796 | screen coordinates. (Window-based redisplay sets | |
2797 | this in update_window, but no one seems to do that | |
2798 | for frame-based redisplay.) */ | |
2799 | if (current_row->mode_line_p) | |
2800 | current_row->y = row; | |
5f5c8ee5 GM |
2801 | } |
2802 | } | |
177c0ea7 | 2803 | |
5f5c8ee5 GM |
2804 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2805 | } | |
2806 | } | |
2807 | ||
2808 | ||
2809 | /* Perform row dance after scrolling. We are working on the range of | |
2810 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2811 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2812 | row I in the range 0 <= I < NLINES, the index of the original line | |
2813 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2814 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2815 | row 0 <= I < NLINES which is empty. | |
2816 | ||
2817 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2818 | |
5f5c8ee5 | 2819 | void |
6f704c76 DN |
2820 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2821 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2822 | { |
2823 | /* A copy of original rows. */ | |
2824 | struct glyph_row *old_rows; | |
2825 | ||
2826 | /* Rows to assign to. */ | |
2827 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2828 | |
5f5c8ee5 GM |
2829 | int i; |
2830 | ||
2831 | /* Make a copy of the original rows. */ | |
2832 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2833 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2834 | |
2835 | /* Assign new rows, maybe clear lines. */ | |
2836 | for (i = 0; i < nlines; ++i) | |
2837 | { | |
2838 | int enabled_before_p = new_rows[i].enabled_p; | |
2839 | ||
2840 | xassert (i + unchanged_at_top < matrix->nrows); | |
2841 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2842 | new_rows[i] = old_rows[copy_from[i]]; | |
2843 | new_rows[i].enabled_p = enabled_before_p; | |
2844 | ||
2845 | /* RETAINED_P is zero for empty lines. */ | |
2846 | if (!retained_p[copy_from[i]]) | |
2847 | new_rows[i].enabled_p = 0; | |
2848 | } | |
2849 | ||
153a073c | 2850 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2851 | if (frame_matrix_frame) |
2852 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2853 | unchanged_at_top, nlines, copy_from, retained_p); | |
2854 | } | |
2855 | ||
2856 | ||
a13396c9 | 2857 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2858 | the current frame matrix. */ |
a13396c9 GM |
2859 | |
2860 | static void | |
971de7fb | 2861 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2862 | { |
2863 | struct frame *f = XFRAME (w->frame); | |
2864 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2865 | int left, right, x, width; |
a13396c9 | 2866 | |
5cb88111 | 2867 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2868 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2869 | xassert (!FRAME_WINDOW_P (f)); |
2870 | ||
7df02016 KS |
2871 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2872 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2873 | x = w->current_matrix->matrix_x; |
2874 | width = w->current_matrix->matrix_w; | |
2875 | ||
a13396c9 GM |
2876 | window_row = w->current_matrix->rows; |
2877 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2878 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2879 | |
5cb88111 | 2880 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2881 | { |
5cb88111 GM |
2882 | window_row->glyphs[LEFT_MARGIN_AREA] |
2883 | = frame_row->glyphs[0] + x; | |
2884 | window_row->glyphs[TEXT_AREA] | |
2885 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2886 | window_row->glyphs[LAST_AREA] | |
2887 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2888 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2889 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2890 | } |
2891 | } | |
2892 | ||
2893 | ||
2894 | /* Return the window in the window tree rooted in W containing frame | |
2895 | row ROW. Value is null if none is found. */ | |
2896 | ||
09ad5a91 | 2897 | static struct window * |
971de7fb | 2898 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2899 | { |
2900 | struct window *found = NULL; | |
177c0ea7 | 2901 | |
a13396c9 GM |
2902 | while (w && !found) |
2903 | { | |
2904 | if (!NILP (w->hchild)) | |
2905 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2906 | else if (!NILP (w->vchild)) | |
2907 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2908 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2909 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2910 | found = w; |
177c0ea7 | 2911 | |
a13396c9 GM |
2912 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2913 | } | |
2914 | ||
2915 | return found; | |
2916 | } | |
2917 | ||
2918 | ||
5f5c8ee5 GM |
2919 | /* Perform a line dance in the window tree rooted at W, after |
2920 | scrolling a frame matrix in mirrored_line_dance. | |
2921 | ||
2922 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2923 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2924 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2925 | I < NLINES, the index of the original line to move to I. This | |
2926 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2927 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2928 | which is empty. */ | |
2929 | ||
2930 | static void | |
971de7fb | 2931 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2932 | { |
2933 | while (w) | |
2934 | { | |
2935 | if (!NILP (w->hchild)) | |
2936 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2937 | nlines, copy_from, retained_p); | |
2938 | else if (!NILP (w->vchild)) | |
2939 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2940 | nlines, copy_from, retained_p); | |
2941 | else | |
2942 | { | |
2943 | /* W is a leaf window, and we are working on its current | |
2944 | matrix m. */ | |
2945 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2946 | int i, sync_p = 0; |
5f5c8ee5 GM |
2947 | struct glyph_row *old_rows; |
2948 | ||
2949 | /* Make a copy of the original rows of matrix m. */ | |
2950 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2951 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2952 | |
2953 | for (i = 0; i < nlines; ++i) | |
2954 | { | |
2955 | /* Frame relative line assigned to. */ | |
2956 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2957 | |
5f5c8ee5 GM |
2958 | /* Frame relative line assigned. */ |
2959 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2960 | |
5f5c8ee5 GM |
2961 | /* Window relative line assigned to. */ |
2962 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2963 | |
5f5c8ee5 GM |
2964 | /* Window relative line assigned. */ |
2965 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2966 | |
5f5c8ee5 GM |
2967 | /* Is assigned line inside window? */ |
2968 | int from_inside_window_p | |
2969 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2970 | |
a13396c9 GM |
2971 | /* Is assigned to line inside window? */ |
2972 | int to_inside_window_p | |
2973 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2974 | |
a13396c9 | 2975 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2976 | { |
5f5c8ee5 GM |
2977 | /* Enabled setting before assignment. */ |
2978 | int enabled_before_p; | |
177c0ea7 | 2979 | |
5f5c8ee5 GM |
2980 | /* Do the assignment. The enabled_p flag is saved |
2981 | over the assignment because the old redisplay did | |
2982 | that. */ | |
2983 | enabled_before_p = m->rows[window_to].enabled_p; | |
2984 | m->rows[window_to] = old_rows[window_from]; | |
2985 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2986 | |
5f5c8ee5 GM |
2987 | /* If frame line is empty, window line is empty, too. */ |
2988 | if (!retained_p[copy_from[i]]) | |
2989 | m->rows[window_to].enabled_p = 0; | |
2990 | } | |
a13396c9 GM |
2991 | else if (to_inside_window_p) |
2992 | { | |
2993 | /* A copy between windows. This is an infrequent | |
2994 | case not worth optimizing. */ | |
2995 | struct frame *f = XFRAME (w->frame); | |
2996 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
2997 | struct window *w2; | |
2998 | struct glyph_matrix *m2; | |
2999 | int m2_from; | |
3000 | ||
fe8b8401 | 3001 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3002 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3003 | -nw', FROM_FRAME sometimes has no associated window. | |
3004 | This check avoids a segfault if W2 is null. */ | |
3005 | if (w2) | |
3006 | { | |
3007 | m2 = w2->current_matrix; | |
3008 | m2_from = frame_from - m2->matrix_y; | |
3009 | copy_row_except_pointers (m->rows + window_to, | |
3010 | m2->rows + m2_from); | |
3011 | ||
3012 | /* If frame line is empty, window line is empty, too. */ | |
3013 | if (!retained_p[copy_from[i]]) | |
3014 | m->rows[window_to].enabled_p = 0; | |
3015 | } | |
a13396c9 GM |
3016 | sync_p = 1; |
3017 | } | |
3018 | else if (from_inside_window_p) | |
3019 | sync_p = 1; | |
5f5c8ee5 | 3020 | } |
a13396c9 GM |
3021 | |
3022 | /* If there was a copy between windows, make sure glyph | |
3023 | pointers are in sync with the frame matrix. */ | |
3024 | if (sync_p) | |
3025 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3026 | |
5f5c8ee5 GM |
3027 | /* Check that no pointers are lost. */ |
3028 | CHECK_MATRIX (m); | |
3029 | } | |
3030 | ||
3031 | /* Next window on same level. */ | |
3032 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3033 | } | |
3034 | } | |
3035 | ||
3036 | ||
3037 | #if GLYPH_DEBUG | |
3038 | ||
3039 | /* Check that window and frame matrices agree about their | |
3040 | understanding where glyphs of the rows are to find. For each | |
3041 | window in the window tree rooted at W, check that rows in the | |
3042 | matrices of leaf window agree with their frame matrices about | |
3043 | glyph pointers. */ | |
3044 | ||
85fece3e | 3045 | static void |
59fc5cf9 | 3046 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3047 | { |
3048 | while (w) | |
3049 | { | |
3050 | if (!NILP (w->hchild)) | |
3051 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3052 | else if (!NILP (w->vchild)) | |
3053 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3054 | else | |
60a8948a | 3055 | { |
5f5c8ee5 GM |
3056 | struct frame *f = XFRAME (w->frame); |
3057 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3058 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3059 | } |
177c0ea7 | 3060 | |
5f5c8ee5 GM |
3061 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3062 | } | |
3063 | } | |
3064 | ||
3065 | ||
3066 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3067 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3068 | each row in WINDOW_MATRIX check that it's a slice of the | |
3069 | corresponding frame row. If it isn't, abort. */ | |
3070 | ||
3071 | static void | |
59fc5cf9 AS |
3072 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3073 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3074 | { |
3075 | /* Row number in WINDOW_MATRIX. */ | |
3076 | int i = 0; | |
3077 | ||
3078 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3079 | int j = window_matrix->matrix_y; | |
3080 | ||
177c0ea7 | 3081 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3082 | slice of the row in the frame matrix. If it isn't we didn't |
3083 | mirror an operation on the frame matrix correctly. */ | |
3084 | while (i < window_matrix->nrows) | |
3085 | { | |
3086 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3087 | frame_matrix->rows + j)) | |
3088 | abort (); | |
3089 | ++i, ++j; | |
3090 | } | |
3091 | } | |
3092 | ||
3093 | #endif /* GLYPH_DEBUG != 0 */ | |
3094 | ||
3095 | ||
3096 | \f | |
3097 | /********************************************************************** | |
3098 | VPOS and HPOS translations | |
3099 | **********************************************************************/ | |
3100 | ||
3101 | #if GLYPH_DEBUG | |
3102 | ||
3103 | /* Translate vertical position VPOS which is relative to window W to a | |
3104 | vertical position relative to W's frame. */ | |
3105 | ||
3106 | static int | |
59fc5cf9 | 3107 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3108 | { |
85fece3e | 3109 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
5f5c8ee5 | 3110 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3111 | vpos += WINDOW_TOP_EDGE_LINE (w); |
85fece3e | 3112 | xassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3113 | return vpos; |
3114 | } | |
3115 | ||
3116 | ||
3117 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3118 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3119 | |
3120 | static int | |
59fc5cf9 | 3121 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3122 | { |
82f4a138 | 3123 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3124 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3125 | return hpos; |
3126 | } | |
177c0ea7 | 3127 | |
5f5c8ee5 GM |
3128 | #endif /* GLYPH_DEBUG */ |
3129 | ||
3130 | ||
3131 | \f | |
3132 | /********************************************************************** | |
3133 | Redrawing Frames | |
3134 | **********************************************************************/ | |
3135 | ||
a7ca3326 | 3136 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3137 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3138 | (Lisp_Object frame) |
5f5c8ee5 GM |
3139 | { |
3140 | struct frame *f; | |
3141 | ||
b7826503 | 3142 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3143 | f = XFRAME (frame); |
3144 | ||
3145 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3146 | (Implementation note: It still has to be checked why we are | |
3147 | called so early here). */ | |
3148 | if (!glyphs_initialized_initially_p) | |
3149 | return Qnil; | |
3150 | ||
3151 | update_begin (f); | |
3224dac1 | 3152 | #ifdef MSDOS |
f2adda5e | 3153 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3154 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3155 | #endif |
385ed61f | 3156 | clear_frame (f); |
5f5c8ee5 GM |
3157 | clear_current_matrices (f); |
3158 | update_end (f); | |
daf01701 | 3159 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3160 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3161 | windows_or_buffers_changed++; |
3162 | /* Mark all windows as inaccurate, so that every window will have | |
3163 | its redisplay done. */ | |
3164 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3165 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3166 | f->garbaged = 0; | |
3167 | return Qnil; | |
3168 | } | |
3169 | ||
3170 | ||
3171 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3172 | function redraw-frame. */ | |
3173 | ||
3174 | void | |
971de7fb | 3175 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3176 | { |
3177 | Lisp_Object frame; | |
3178 | XSETFRAME (frame, f); | |
3179 | Fredraw_frame (frame); | |
3180 | } | |
3181 | ||
3182 | ||
3183 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3184 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3185 | (void) |
5f5c8ee5 GM |
3186 | { |
3187 | Lisp_Object tail, frame; | |
3188 | ||
3189 | FOR_EACH_FRAME (tail, frame) | |
3190 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3191 | Fredraw_frame (frame); | |
3192 | ||
3193 | return Qnil; | |
3194 | } | |
3195 | ||
3196 | ||
5f5c8ee5 | 3197 | \f |
5f5c8ee5 GM |
3198 | /*********************************************************************** |
3199 | Frame Update | |
3200 | ***********************************************************************/ | |
4588ec20 | 3201 | |
5f5c8ee5 | 3202 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3203 | |
5f5c8ee5 GM |
3204 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3205 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3206 | scrolling. | |
177c0ea7 | 3207 | |
5f5c8ee5 | 3208 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3209 | |
5f5c8ee5 | 3210 | int |
971de7fb | 3211 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3212 | { |
3213 | /* 1 means display has been paused because of pending input. */ | |
3214 | int paused_p; | |
3215 | struct window *root_window = XWINDOW (f->root_window); | |
3216 | ||
a2130dbb KS |
3217 | if (redisplay_dont_pause) |
3218 | force_p = 1; | |
d012c62b | 3219 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3220 | else if (NILP (Vredisplay_preemption_period)) |
3221 | force_p = 1; | |
3222 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3223 | { |
3224 | EMACS_TIME tm; | |
3225 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3226 | int sec, usec; | |
3227 | ||
993d4ab6 KS |
3228 | if (detect_input_pending_ignore_squeezables ()) |
3229 | { | |
3230 | paused_p = 1; | |
3231 | goto do_pause; | |
3232 | } | |
3233 | ||
d012c62b KS |
3234 | sec = (int) p; |
3235 | usec = (p - sec) * 1000000; | |
3236 | ||
3237 | EMACS_GET_TIME (tm); | |
3238 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3239 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3240 | } | |
3241 | #endif | |
3242 | ||
5f5c8ee5 | 3243 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3244 | { |
5f5c8ee5 GM |
3245 | /* We are working on window matrix basis. All windows whose |
3246 | flag must_be_updated_p is set have to be updated. */ | |
3247 | ||
3248 | /* Record that we are not working on frame matrices. */ | |
3249 | set_frame_matrix_frame (NULL); | |
3250 | ||
3251 | /* Update all windows in the window tree of F, maybe stopping | |
3252 | when pending input is detected. */ | |
3253 | update_begin (f); | |
3254 | ||
3255 | /* Update the menu bar on X frames that don't have toolkit | |
3256 | support. */ | |
3257 | if (WINDOWP (f->menu_bar_window)) | |
3258 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3259 | ||
3260 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3261 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3262 | { |
9ea173e8 | 3263 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3264 | |
3265 | /* Update tool-bar window. */ | |
3266 | if (w->must_be_updated_p) | |
4588ec20 | 3267 | { |
153a073c PJ |
3268 | Lisp_Object tem; |
3269 | ||
5f5c8ee5 GM |
3270 | update_window (w, 1); |
3271 | w->must_be_updated_p = 0; | |
3272 | ||
3273 | /* Swap tool-bar strings. We swap because we want to | |
3274 | reuse strings. */ | |
9ea173e8 GM |
3275 | tem = f->current_tool_bar_string; |
3276 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3277 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3278 | } |
3279 | } | |
177c0ea7 | 3280 | |
5f5c8ee5 GM |
3281 | |
3282 | /* Update windows. */ | |
3283 | paused_p = update_window_tree (root_window, force_p); | |
3284 | update_end (f); | |
177c0ea7 | 3285 | |
6b61353c | 3286 | /* This flush is a performance bottleneck under X, |
e581a466 | 3287 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3288 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3289 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3290 | if (f->force_flush_display_p) |
e581a466 KL |
3291 | { |
3292 | FRAME_RIF (f)->flush_display (f); | |
3293 | f->force_flush_display_p = 0; | |
3294 | } | |
4588ec20 | 3295 | } |
5f5c8ee5 GM |
3296 | else |
3297 | { | |
3298 | /* We are working on frame matrix basis. Set the frame on whose | |
3299 | frame matrix we operate. */ | |
3300 | set_frame_matrix_frame (f); | |
3301 | ||
868dd24b | 3302 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3303 | build_frame_matrix (f); |
177c0ea7 | 3304 | |
868dd24b GM |
3305 | /* Update the display */ |
3306 | update_begin (f); | |
5f5c8ee5 | 3307 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3308 | update_end (f); |
3309 | ||
7d2f1216 | 3310 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3311 | { |
0b0d3e0b KL |
3312 | if (FRAME_TTY (f)->termscript) |
3313 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3314 | if (FRAME_TERMCAP_P (f)) |
3315 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3316 | } |
868dd24b | 3317 | |
5f5c8ee5 | 3318 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3319 | #if GLYPH_DEBUG |
9b0e97aa GM |
3320 | check_window_matrix_pointers (root_window); |
3321 | add_frame_display_history (f, paused_p); | |
3322 | #endif | |
5f5c8ee5 GM |
3323 | } |
3324 | ||
ef1b0ba7 | 3325 | #if PERIODIC_PREEMPTION_CHECKING |
993d4ab6 | 3326 | do_pause: |
ef1b0ba7 | 3327 | #endif |
5f5c8ee5 GM |
3328 | /* Reset flags indicating that a window should be updated. */ |
3329 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3330 | |
868dd24b | 3331 | display_completed = !paused_p; |
5f5c8ee5 | 3332 | return paused_p; |
4588ec20 | 3333 | } |
5f5c8ee5 GM |
3334 | |
3335 | ||
4588ec20 | 3336 | \f |
5f5c8ee5 GM |
3337 | /************************************************************************ |
3338 | Window-based updates | |
3339 | ************************************************************************/ | |
3340 | ||
3341 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3342 | don't stop updating when input is pending. */ | |
3343 | ||
3344 | static int | |
971de7fb | 3345 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3346 | { |
3347 | int paused_p = 0; | |
177c0ea7 | 3348 | |
5f5c8ee5 GM |
3349 | while (w && !paused_p) |
3350 | { | |
3351 | if (!NILP (w->hchild)) | |
3352 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3353 | else if (!NILP (w->vchild)) | |
3354 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3355 | else if (w->must_be_updated_p) | |
3356 | paused_p |= update_window (w, force_p); | |
3357 | ||
3358 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3359 | } | |
3360 | ||
3361 | return paused_p; | |
3362 | } | |
3363 | ||
3364 | ||
3365 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3366 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3367 | ||
3368 | void | |
971de7fb | 3369 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3370 | { |
3371 | if (w->must_be_updated_p) | |
3372 | { | |
3373 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3374 | ||
3375 | /* Record that this is not a frame-based redisplay. */ | |
3376 | set_frame_matrix_frame (NULL); | |
3377 | ||
a2130dbb KS |
3378 | if (redisplay_dont_pause) |
3379 | force_p = 1; | |
d012c62b | 3380 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3381 | else if (NILP (Vredisplay_preemption_period)) |
3382 | force_p = 1; | |
3383 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3384 | { |
3385 | EMACS_TIME tm; | |
3386 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3387 | int sec, usec; | |
3388 | ||
3389 | sec = (int) p; | |
3390 | usec = (p - sec) * 1000000; | |
3391 | ||
3392 | EMACS_GET_TIME (tm); | |
3393 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3394 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3395 | } | |
3396 | #endif | |
3397 | ||
5f5c8ee5 GM |
3398 | /* Update W. */ |
3399 | update_begin (f); | |
3400 | update_window (w, force_p); | |
3401 | update_end (f); | |
4588ec20 | 3402 | |
5f5c8ee5 GM |
3403 | /* Reset flag in W. */ |
3404 | w->must_be_updated_p = 0; | |
3405 | } | |
3406 | } | |
4588ec20 | 3407 | |
93e023fc | 3408 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3409 | |
408f5064 GM |
3410 | /* Redraw lines from the current matrix of window W that are |
3411 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3412 | ||
3413 | static void | |
971de7fb | 3414 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3415 | { |
d8ee7803 | 3416 | int i; |
fa971ac3 | 3417 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3418 | |
408f5064 GM |
3419 | /* If rows overlapping others have been changed, the rows being |
3420 | overlapped have to be redrawn. This won't draw lines that have | |
3421 | already been drawn in update_window_line because overlapped_p in | |
3422 | desired rows is 0, so after row assignment overlapped_p in | |
3423 | current rows is 0. */ | |
3424 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3425 | { | |
e876ff42 | 3426 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3427 | |
3428 | if (!row->enabled_p) | |
3429 | break; | |
3430 | else if (row->mode_line_p) | |
3431 | continue; | |
177c0ea7 | 3432 | |
408f5064 GM |
3433 | if (row->overlapped_p) |
3434 | { | |
3435 | enum glyph_row_area area; | |
177c0ea7 | 3436 | |
408f5064 GM |
3437 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3438 | { | |
3439 | updated_row = row; | |
3440 | updated_area = area; | |
fa971ac3 KL |
3441 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3442 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3443 | if (row->used[area]) |
fa971ac3 KL |
3444 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3445 | row->used[area]); | |
3446 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3447 | } |
177c0ea7 | 3448 | |
408f5064 GM |
3449 | row->overlapped_p = 0; |
3450 | } | |
3451 | ||
e876ff42 | 3452 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3453 | break; |
3454 | } | |
3455 | } | |
3456 | ||
3457 | ||
3458 | /* Redraw lines from the current matrix of window W that overlap | |
3459 | others. YB is bottom-most y-position in W. */ | |
3460 | ||
3461 | static void | |
971de7fb | 3462 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3463 | { |
3464 | int i, bottom_y; | |
3465 | struct glyph_row *row; | |
fa971ac3 | 3466 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3467 | |
408f5064 GM |
3468 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3469 | { | |
3470 | row = w->current_matrix->rows + i; | |
3471 | ||
3472 | if (!row->enabled_p) | |
3473 | break; | |
3474 | else if (row->mode_line_p) | |
3475 | continue; | |
177c0ea7 | 3476 | |
408f5064 GM |
3477 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3478 | ||
b4b2c2ca | 3479 | if (row->overlapping_p) |
408f5064 | 3480 | { |
41124e06 YM |
3481 | int overlaps = 0; |
3482 | ||
b4b2c2ca | 3483 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3484 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3485 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3486 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3487 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3488 | overlaps |= OVERLAPS_SUCC; | |
3489 | ||
3490 | if (overlaps) | |
3491 | { | |
3492 | if (row->used[LEFT_MARGIN_AREA]) | |
3493 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3494 | ||
3495 | if (row->used[TEXT_AREA]) | |
3496 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3497 | ||
3498 | if (row->used[RIGHT_MARGIN_AREA]) | |
3499 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3500 | ||
c5e87d10 | 3501 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3502 | their display. */ |
3503 | if (overlaps & OVERLAPS_PRED) | |
3504 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3505 | if (overlaps & OVERLAPS_SUCC) | |
3506 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3507 | } | |
408f5064 GM |
3508 | } |
3509 | ||
3510 | if (bottom_y >= yb) | |
3511 | break; | |
3512 | } | |
3513 | } | |
3514 | ||
93e023fc KS |
3515 | #endif /* HAVE_WINDOW_SYSTEM */ |
3516 | ||
408f5064 | 3517 | |
09ad5a91 | 3518 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3519 | |
3520 | /* Check that no row in the current matrix of window W is enabled | |
3521 | which is below what's displayed in the window. */ | |
3522 | ||
09ad5a91 | 3523 | static void |
971de7fb | 3524 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3525 | { |
3526 | int last_seen_p = 0; | |
3527 | int i, yb = window_text_bottom_y (w); | |
3528 | ||
3529 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3530 | { | |
3531 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3532 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3533 | last_seen_p = 1; | |
3534 | else if (last_seen_p && row->enabled_p) | |
3535 | abort (); | |
3536 | } | |
3537 | } | |
3538 | ||
3539 | #endif /* GLYPH_DEBUG */ | |
3540 | ||
3541 | ||
5f5c8ee5 GM |
3542 | /* Update display of window W. FORCE_P non-zero means that we should |
3543 | not stop when detecting pending input. */ | |
3544 | ||
3545 | static int | |
971de7fb | 3546 | update_window (struct window *w, int force_p) |
4588ec20 | 3547 | { |
5f5c8ee5 GM |
3548 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3549 | int paused_p; | |
d012c62b | 3550 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3551 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3552 | #endif |
597cfb3f | 3553 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3554 | #if GLYPH_DEBUG |
5f5c8ee5 | 3555 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3556 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3557 | #endif |
5f5c8ee5 GM |
3558 | |
3559 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3560 | #if !PERIODIC_PREEMPTION_CHECKING |
3561 | if (!force_p) | |
a2d5fca0 | 3562 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3563 | #endif |
4588ec20 | 3564 | |
5f5c8ee5 GM |
3565 | /* If forced to complete the update, or if no input is pending, do |
3566 | the update. */ | |
8fd9a666 | 3567 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3568 | { |
5f5c8ee5 GM |
3569 | struct glyph_row *row, *end; |
3570 | struct glyph_row *mode_line_row; | |
56974e03 | 3571 | struct glyph_row *header_line_row; |
0bc32927 PE |
3572 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3573 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3574 | int n_updated = 0; | |
3575 | #endif | |
5f5c8ee5 GM |
3576 | |
3577 | rif->update_window_begin_hook (w); | |
3578 | yb = window_text_bottom_y (w); | |
3579 | ||
153a073c PJ |
3580 | /* If window has a header line, update it before everything else. |
3581 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
3582 | row = desired_matrix->rows; |
3583 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3584 | |
5f5c8ee5 | 3585 | if (row->mode_line_p) |
56974e03 GM |
3586 | { |
3587 | header_line_row = row; | |
3588 | ++row; | |
3589 | } | |
3590 | else | |
3591 | header_line_row = NULL; | |
5f5c8ee5 GM |
3592 | |
3593 | /* Update the mode line, if necessary. */ | |
3594 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3595 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3596 | { | |
3597 | mode_line_row->y = yb; | |
3598 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3599 | desired_matrix), |
3600 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3601 | } |
3602 | ||
3603 | /* Find first enabled row. Optimizations in redisplay_internal | |
3604 | may lead to an update with only one row enabled. There may | |
3605 | be also completely empty matrices. */ | |
3606 | while (row < end && !row->enabled_p) | |
3607 | ++row; | |
177c0ea7 | 3608 | |
bfdcafe1 | 3609 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3610 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3611 | { |
3612 | int rc = scrolling_window (w, header_line_row != NULL); | |
3613 | if (rc < 0) | |
3614 | { | |
3615 | /* All rows were found to be equal. */ | |
3616 | paused_p = 0; | |
3617 | goto set_cursor; | |
3618 | } | |
3619 | else if (rc > 0) | |
6b61353c KH |
3620 | { |
3621 | /* We've scrolled the display. */ | |
3622 | force_p = 1; | |
3623 | changed_p = 1; | |
3624 | } | |
5f5c8ee5 GM |
3625 | } |
3626 | ||
3627 | /* Update the rest of the lines. */ | |
0bc32927 | 3628 | for (; row < end && (force_p || !input_pending); ++row) |
b7412313 | 3629 | if (row->enabled_p) |
5f5c8ee5 GM |
3630 | { |
3631 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3632 | int i; | |
177c0ea7 | 3633 | |
153a073c | 3634 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3635 | detect_input_pending. If it's done too often, |
3636 | scrolling large windows with repeated scroll-up | |
3637 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3638 | #if PERIODIC_PREEMPTION_CHECKING |
3639 | if (!force_p) | |
3640 | { | |
3641 | EMACS_TIME tm, dif; | |
3642 | EMACS_GET_TIME (tm); | |
3643 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3644 | if (EMACS_TIME_NEG_P (dif)) | |
3645 | { | |
3646 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3647 | if (detect_input_pending_ignore_squeezables ()) |
3648 | break; | |
d012c62b KS |
3649 | } |
3650 | } | |
3651 | #else | |
e87b8809 | 3652 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3653 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3654 | #endif |
e876ff42 GM |
3655 | changed_p |= update_window_line (w, vpos, |
3656 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3657 | |
3658 | /* Mark all rows below the last visible one in the current | |
3659 | matrix as invalid. This is necessary because of | |
3660 | variable line heights. Consider the case of three | |
3661 | successive redisplays, where the first displays 5 | |
3662 | lines, the second 3 lines, and the third 5 lines again. | |
3663 | If the second redisplay wouldn't mark rows in the | |
3664 | current matrix invalid, the third redisplay might be | |
3665 | tempted to optimize redisplay based on lines displayed | |
3666 | in the first redisplay. */ | |
3667 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3668 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3669 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3670 | } | |
3671 | ||
3672 | /* Was display preempted? */ | |
3673 | paused_p = row < end; | |
177c0ea7 | 3674 | |
56974e03 | 3675 | set_cursor: |
177c0ea7 | 3676 | |
6b61353c KH |
3677 | /* Update the header line after scrolling because a new header |
3678 | line would otherwise overwrite lines at the top of the window | |
3679 | that can be scrolled. */ | |
3680 | if (header_line_row && header_line_row->enabled_p) | |
3681 | { | |
3682 | header_line_row->y = 0; | |
3683 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3684 | } |
3685 | ||
153a073c | 3686 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3687 | if (!paused_p && !w->pseudo_window_p) |
3688 | { | |
93e023fc | 3689 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3690 | if (changed_p && rif->fix_overlapping_area) |
3691 | { | |
3692 | redraw_overlapped_rows (w, yb); | |
3693 | redraw_overlapping_rows (w, yb); | |
3694 | } | |
93e023fc | 3695 | #endif |
177c0ea7 | 3696 | |
5f5c8ee5 GM |
3697 | /* Make cursor visible at cursor position of W. */ |
3698 | set_window_cursor_after_update (w); | |
3699 | ||
e876ff42 GM |
3700 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3701 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3702 | IF_DEBUG (check_matrix_invariants (w)); |
3703 | #endif | |
4588ec20 | 3704 | } |
5f5c8ee5 GM |
3705 | |
3706 | #if GLYPH_DEBUG | |
3707 | /* Remember the redisplay method used to display the matrix. */ | |
3708 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3709 | #endif | |
408f5064 | 3710 | |
6b61353c KH |
3711 | #ifdef HAVE_WINDOW_SYSTEM |
3712 | update_window_fringes (w, 0); | |
3713 | #endif | |
3714 | ||
56974e03 GM |
3715 | /* End the update of window W. Don't set the cursor if we |
3716 | paused updating the display because in this case, | |
3717 | set_window_cursor_after_update hasn't been called, and | |
3718 | output_cursor doesn't contain the cursor location. */ | |
3719 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3720 | } |
5f5c8ee5 GM |
3721 | else |
3722 | paused_p = 1; | |
3723 | ||
2d5912c1 | 3724 | #if GLYPH_DEBUG |
0cffd9d8 | 3725 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3726 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3727 | #endif | |
177c0ea7 | 3728 | |
5f5c8ee5 | 3729 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3730 | |
5f5c8ee5 | 3731 | return paused_p; |
4588ec20 JB |
3732 | } |
3733 | ||
b64b3980 | 3734 | |
5f5c8ee5 GM |
3735 | /* Update the display of area AREA in window W, row number VPOS. |
3736 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3737 | ||
3738 | static void | |
971de7fb | 3739 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3740 | { |
5f5c8ee5 | 3741 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3742 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3743 | |
3744 | /* Let functions in xterm.c know what area subsequent X positions | |
3745 | will be relative to. */ | |
3746 | updated_area = area; | |
3747 | ||
3748 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3749 | of the area. I don't think that something more sophisticated is | |
3750 | necessary here, since marginal areas will not be the default. */ | |
3751 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3752 | if (desired_row->used[area]) | |
3753 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3754 | rif->clear_end_of_line (-1); | |
b64b3980 | 3755 | } |
23b0200c | 3756 | |
352f1545 | 3757 | |
408f5064 GM |
3758 | /* Update the display of the text area of row VPOS in window W. |
3759 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3760 | |
408f5064 | 3761 | static int |
971de7fb | 3762 | update_text_area (struct window *w, int vpos) |
23b0200c | 3763 | { |
5f5c8ee5 GM |
3764 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3765 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3766 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3767 | int changed_p = 0; |
5f5c8ee5 GM |
3768 | |
3769 | /* Let functions in xterm.c know what area subsequent X positions | |
3770 | will be relative to. */ | |
3771 | updated_area = TEXT_AREA; | |
177c0ea7 | 3772 | |
5f5c8ee5 GM |
3773 | /* If rows are at different X or Y, or rows have different height, |
3774 | or the current row is marked invalid, write the entire line. */ | |
3775 | if (!current_row->enabled_p | |
3776 | || desired_row->y != current_row->y | |
3777 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3778 | || desired_row->phys_ascent != current_row->phys_ascent |
3779 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3780 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3781 | || current_row->overlapped_p |
fee8b690 CY |
3782 | /* This next line is necessary for correctly redrawing |
3783 | mouse-face areas after scrolling and other operations. | |
3784 | However, it causes excessive flickering when mouse is moved | |
3785 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3786 | line doesn't seem to hurt anything. -- cyd. |
3787 | But it is still needed for the header line. -- kfs. */ | |
3788 | || (current_row->mouse_face_p | |
3789 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3790 | || current_row->x != desired_row->x) |
3791 | { | |
3792 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3793 | |
5f5c8ee5 GM |
3794 | if (desired_row->used[TEXT_AREA]) |
3795 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3796 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3797 | |
5f5c8ee5 GM |
3798 | /* Clear to end of window. */ |
3799 | rif->clear_end_of_line (-1); | |
408f5064 | 3800 | changed_p = 1; |
60f2f3f1 GM |
3801 | |
3802 | /* This erases the cursor. We do this here because | |
3803 | notice_overwritten_cursor cannot easily check this, which | |
3804 | might indicate that the whole functionality of | |
3805 | notice_overwritten_cursor would better be implemented here. | |
3806 | On the other hand, we need notice_overwritten_cursor as long | |
3807 | as mouse highlighting is done asynchronously outside of | |
3808 | redisplay. */ | |
3809 | if (vpos == w->phys_cursor.vpos) | |
3810 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3811 | } |
3812 | else | |
3813 | { | |
3814 | int stop, i, x; | |
3815 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3816 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3817 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3818 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3819 | int abort_skipping = 0; |
5f5c8ee5 | 3820 | |
78897758 YM |
3821 | /* If the desired row extends its face to the text area end, and |
3822 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3823 | make sure we write at least one glyph, so that the face |
3824 | extension actually takes place. */ | |
78897758 YM |
3825 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3826 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3827 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3828 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3829 | --desired_stop_pos; |
177c0ea7 | 3830 | |
5f5c8ee5 GM |
3831 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3832 | i = 0; | |
3833 | x = desired_row->x; | |
8399f8a0 GM |
3834 | |
3835 | /* Loop over glyphs that current and desired row may have | |
3836 | in common. */ | |
5f5c8ee5 | 3837 | while (i < stop) |
352f1545 | 3838 | { |
91d227d9 | 3839 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3840 | |
5f5c8ee5 | 3841 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3842 | don't have to be written. We can't skip if the last |
3843 | current glyph overlaps the glyph to its right. For | |
3844 | example, consider a current row of `if ' with the `f' in | |
3845 | Courier bold so that it overlaps the ` ' to its right. | |
3846 | If the desired row is ` ', we would skip over the space | |
3847 | after the `if' and there would remain a pixel from the | |
3848 | `f' on the screen. */ | |
3849 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3850 | { |
e47306e6 GM |
3851 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3852 | int left, right; | |
177c0ea7 | 3853 | |
e47306e6 GM |
3854 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3855 | &left, &right); | |
91d227d9 | 3856 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3857 | } |
177c0ea7 | 3858 | |
6d950f4c | 3859 | if (can_skip_p) |
352f1545 | 3860 | { |
91d227d9 CY |
3861 | int start_hpos = i; |
3862 | ||
6d950f4c GM |
3863 | while (i < stop |
3864 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3865 | { | |
3866 | x += desired_glyph->pixel_width; | |
3867 | ++desired_glyph, ++current_glyph, ++i; | |
3868 | } | |
3869 | ||
3870 | /* Consider the case that the current row contains "xxx | |
3871 | ppp ggg" in italic Courier font, and the desired row | |
3872 | is "xxx ggg". The character `p' has lbearing, `g' | |
3873 | has not. The loop above will stop in front of the | |
3874 | first `p' in the current row. If we would start | |
3875 | writing glyphs there, we wouldn't erase the lbearing | |
3876 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3877 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3878 | if (overlapping_glyphs_p |
3879 | && i > 0 | |
3880 | && i < current_row->used[TEXT_AREA] | |
3881 | && (current_row->used[TEXT_AREA] | |
3882 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3883 | { |
6d950f4c | 3884 | int left, right; |
177c0ea7 | 3885 | |
6d950f4c GM |
3886 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3887 | &left, &right); | |
3888 | while (left > 0 && i > 0) | |
3889 | { | |
3890 | --i, --desired_glyph, --current_glyph; | |
3891 | x -= desired_glyph->pixel_width; | |
3892 | left -= desired_glyph->pixel_width; | |
3893 | } | |
91d227d9 CY |
3894 | |
3895 | /* Abort the skipping algorithm if we end up before | |
3896 | our starting point, to avoid looping (bug#1070). | |
3897 | This can happen when the lbearing is larger than | |
3898 | the pixel width. */ | |
3899 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3900 | } |
352f1545 | 3901 | } |
177c0ea7 | 3902 | |
5f5c8ee5 GM |
3903 | /* Try to avoid writing the entire rest of the desired row |
3904 | by looking for a resync point. This mainly prevents | |
3905 | mode line flickering in the case the mode line is in | |
3906 | fixed-pitch font, which it usually will be. */ | |
3907 | if (i < desired_row->used[TEXT_AREA]) | |
3908 | { | |
3909 | int start_x = x, start_hpos = i; | |
3910 | struct glyph *start = desired_glyph; | |
3911 | int current_x = x; | |
6d950f4c GM |
3912 | int skip_first_p = !can_skip_p; |
3913 | ||
5f5c8ee5 GM |
3914 | /* Find the next glyph that's equal again. */ |
3915 | while (i < stop | |
6d950f4c GM |
3916 | && (skip_first_p |
3917 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3918 | && x == current_x) |
3919 | { | |
3920 | x += desired_glyph->pixel_width; | |
3921 | current_x += current_glyph->pixel_width; | |
3922 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3923 | skip_first_p = 0; |
5f5c8ee5 | 3924 | } |
23b0200c | 3925 | |
5f5c8ee5 GM |
3926 | if (i == start_hpos || x != current_x) |
3927 | { | |
3928 | i = start_hpos; | |
3929 | x = start_x; | |
3930 | desired_glyph = start; | |
3931 | break; | |
3932 | } | |
e47306e6 | 3933 | |
5f5c8ee5 GM |
3934 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3935 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3936 | changed_p = 1; |
5f5c8ee5 GM |
3937 | } |
3938 | } | |
177c0ea7 | 3939 | |
5f5c8ee5 GM |
3940 | /* Write the rest. */ |
3941 | if (i < desired_row->used[TEXT_AREA]) | |
3942 | { | |
3943 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3944 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3945 | changed_p = 1; |
5f5c8ee5 | 3946 | } |
177c0ea7 | 3947 | |
5f5c8ee5 GM |
3948 | /* Maybe clear to end of line. */ |
3949 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3950 | { | |
3951 | /* If new row extends to the end of the text area, nothing | |
3952 | has to be cleared, if and only if we did a write_glyphs | |
3953 | above. This is made sure by setting desired_stop_pos | |
3954 | appropriately above. */ | |
78897758 YM |
3955 | xassert (i < desired_row->used[TEXT_AREA] |
3956 | || ((desired_row->used[TEXT_AREA] | |
3957 | == current_row->used[TEXT_AREA]) | |
3958 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3959 | } |
3960 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3961 | { | |
3962 | /* If old row extends to the end of the text area, clear. */ | |
3963 | if (i >= desired_row->used[TEXT_AREA]) | |
3964 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3965 | desired_row->pixel_width); |
5f5c8ee5 | 3966 | rif->clear_end_of_line (-1); |
408f5064 | 3967 | changed_p = 1; |
5f5c8ee5 GM |
3968 | } |
3969 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3970 | { |
5f5c8ee5 GM |
3971 | /* Otherwise clear to the end of the old row. Everything |
3972 | after that position should be clear already. */ | |
27786b2f | 3973 | int xlim; |
177c0ea7 | 3974 | |
5f5c8ee5 GM |
3975 | if (i >= desired_row->used[TEXT_AREA]) |
3976 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3977 | desired_row->pixel_width); |
5f5c8ee5 GM |
3978 | |
3979 | /* If cursor is displayed at the end of the line, make sure | |
3980 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3981 | with which to erase the cursor (because this method | |
3982 | doesn't work with lbearing/rbearing), so we must do it | |
3983 | this way. */ | |
3984 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3985 | && (desired_row->reversed_p |
3986 | ? (w->phys_cursor.hpos < 0) | |
3987 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3988 | { |
3989 | w->phys_cursor_on_p = 0; | |
27786b2f | 3990 | xlim = -1; |
5f5c8ee5 GM |
3991 | } |
3992 | else | |
27786b2f PE |
3993 | xlim = current_row->pixel_width; |
3994 | rif->clear_end_of_line (xlim); | |
408f5064 | 3995 | changed_p = 1; |
2e8907d3 | 3996 | } |
23b0200c | 3997 | } |
408f5064 GM |
3998 | |
3999 | return changed_p; | |
23b0200c | 4000 | } |
4588ec20 | 4001 | |
5f5c8ee5 | 4002 | |
408f5064 GM |
4003 | /* Update row VPOS in window W. Value is non-zero if display has been |
4004 | changed. */ | |
5f5c8ee5 | 4005 | |
408f5064 | 4006 | static int |
971de7fb | 4007 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4008 | { |
4009 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4010 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4011 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4012 | int changed_p = 0; |
5f5c8ee5 | 4013 | |
5f5c8ee5 GM |
4014 | /* Set the row being updated. This is important to let xterm.c |
4015 | know what line height values are in effect. */ | |
4016 | updated_row = desired_row; | |
4017 | ||
177c0ea7 JB |
4018 | /* A row can be completely invisible in case a desired matrix was |
4019 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4020 | the matrix. Make sure to make such rows current anyway, since |
4021 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4022 | if (desired_row->mode_line_p |
4023 | || desired_row->visible_height > 0) | |
408f5064 | 4024 | { |
504805ac GM |
4025 | xassert (desired_row->enabled_p); |
4026 | ||
4027 | /* Update display of the left margin area, if there is one. */ | |
4028 | if (!desired_row->full_width_p | |
7df02016 | 4029 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4030 | { |
4031 | changed_p = 1; | |
4032 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4033 | } | |
177c0ea7 | 4034 | |
504805ac GM |
4035 | /* Update the display of the text area. */ |
4036 | if (update_text_area (w, vpos)) | |
4037 | { | |
4038 | changed_p = 1; | |
4039 | if (current_row->mouse_face_p) | |
4040 | *mouse_face_overwritten_p = 1; | |
4041 | } | |
177c0ea7 | 4042 | |
504805ac GM |
4043 | /* Update display of the right margin area, if there is one. */ |
4044 | if (!desired_row->full_width_p | |
7df02016 | 4045 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4046 | { |
4047 | changed_p = 1; | |
4048 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4049 | } | |
177c0ea7 | 4050 | |
504805ac GM |
4051 | /* Draw truncation marks etc. */ |
4052 | if (!current_row->enabled_p | |
4053 | || desired_row->y != current_row->y | |
4054 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4055 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4056 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4057 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4058 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4059 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4060 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4061 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4062 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4063 | } |
177c0ea7 | 4064 | |
5f5c8ee5 GM |
4065 | /* Update current_row from desired_row. */ |
4066 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4067 | updated_row = NULL; | |
408f5064 | 4068 | return changed_p; |
5f5c8ee5 GM |
4069 | } |
4070 | ||
4071 | ||
4072 | /* Set the cursor after an update of window W. This function may only | |
4073 | be called from update_window. */ | |
4074 | ||
4075 | static void | |
971de7fb | 4076 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4077 | { |
5f5c8ee5 | 4078 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4079 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4080 | int cx, cy, vpos, hpos; |
4081 | ||
4082 | /* Not intended for frame matrix updates. */ | |
4083 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4084 | |
b96fd3e8 GM |
4085 | if (cursor_in_echo_area |
4086 | && !NILP (echo_area_buffer[0]) | |
4087 | /* If we are showing a message instead of the mini-buffer, | |
4088 | show the cursor for the message instead. */ | |
4089 | && XWINDOW (minibuf_window) == w | |
4090 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4091 | /* These cases apply only to the frame that contains |
4092 | the active mini-buffer window. */ | |
4093 | && FRAME_HAS_MINIBUF_P (f) | |
4094 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4095 | { | |
4096 | cx = cy = vpos = hpos = 0; | |
4097 | ||
4098 | if (cursor_in_echo_area >= 0) | |
4099 | { | |
4100 | /* If the mini-buffer is several lines high, find the last | |
4101 | line that has any text on it. Note: either all lines | |
4102 | are enabled or none. Otherwise we wouldn't be able to | |
4103 | determine Y. */ | |
862b4790 GM |
4104 | struct glyph_row *row, *last_row; |
4105 | struct glyph *glyph; | |
4106 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4107 | |
862b4790 | 4108 | last_row = NULL; |
6206f8ce GM |
4109 | row = w->current_matrix->rows; |
4110 | while (row->enabled_p | |
4111 | && (last_row == NULL | |
4112 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4113 | { |
862b4790 GM |
4114 | if (row->used[TEXT_AREA] |
4115 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4116 | last_row = row; | |
6206f8ce | 4117 | ++row; |
862b4790 | 4118 | } |
177c0ea7 | 4119 | |
5f5c8ee5 GM |
4120 | if (last_row) |
4121 | { | |
6206f8ce GM |
4122 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4123 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4124 | |
b96fd3e8 | 4125 | while (last > start && last->charpos < 0) |
862b4790 | 4126 | --last; |
177c0ea7 | 4127 | |
862b4790 GM |
4128 | for (glyph = start; glyph < last; ++glyph) |
4129 | { | |
4130 | cx += glyph->pixel_width; | |
4131 | ++hpos; | |
4132 | } | |
4133 | ||
5f5c8ee5 | 4134 | cy = last_row->y; |
862b4790 | 4135 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4136 | } |
4137 | } | |
4138 | } | |
4139 | else | |
4140 | { | |
4141 | cx = w->cursor.x; | |
4142 | cy = w->cursor.y; | |
4143 | hpos = w->cursor.hpos; | |
4144 | vpos = w->cursor.vpos; | |
4145 | } | |
4588ec20 | 4146 | |
5f5c8ee5 | 4147 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4148 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4149 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4150 | vpos = max (0, vpos); | |
4151 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4152 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4153 | } |
4588ec20 | 4154 | |
5f5c8ee5 | 4155 | |
6df5d75f GM |
4156 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4157 | tree rooted at W. */ | |
4158 | ||
4159 | void | |
971de7fb | 4160 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4161 | { |
4162 | while (w) | |
4163 | { | |
4164 | if (!NILP (w->hchild)) | |
4165 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4166 | else if (!NILP (w->vchild)) | |
4167 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4168 | else | |
4169 | w->must_be_updated_p = on_p; | |
4170 | ||
4171 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4172 | } | |
177c0ea7 | 4173 | } |
6df5d75f GM |
4174 | |
4175 | ||
4176 | \f | |
4177 | /*********************************************************************** | |
4178 | Window-Based Scrolling | |
4179 | ***********************************************************************/ | |
4180 | ||
4181 | /* Structure describing rows in scrolling_window. */ | |
4182 | ||
4183 | struct row_entry | |
4184 | { | |
4185 | /* Number of occurrences of this row in desired and current matrix. */ | |
4186 | int old_uses, new_uses; | |
177c0ea7 | 4187 | |
6df5d75f GM |
4188 | /* Vpos of row in new matrix. */ |
4189 | int new_line_number; | |
4190 | ||
4191 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4192 | ptrdiff_t bucket; |
177c0ea7 | 4193 | |
6df5d75f GM |
4194 | /* The row described by this entry. */ |
4195 | struct glyph_row *row; | |
177c0ea7 | 4196 | |
6df5d75f GM |
4197 | /* Hash collision chain. */ |
4198 | struct row_entry *next; | |
4199 | }; | |
4200 | ||
4201 | /* A pool to allocate row_entry structures from, and the size of the | |
4202 | pool. The pool is reallocated in scrolling_window when we find | |
4203 | that we need a larger one. */ | |
4204 | ||
4205 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4206 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4207 | |
4208 | /* Index of next free entry in row_entry_pool. */ | |
4209 | ||
ca9ce8f2 | 4210 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4211 | |
4212 | /* The hash table used during scrolling, and the table's size. This | |
4213 | table is used to quickly identify equal rows in the desired and | |
4214 | current matrix. */ | |
4215 | ||
4216 | static struct row_entry **row_table; | |
ca9ce8f2 | 4217 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4218 | |
4219 | /* Vectors of pointers to row_entry structures belonging to the | |
4220 | current and desired matrix, and the size of the vectors. */ | |
4221 | ||
4222 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4223 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4224 | |
4225 | /* A pool to allocate run structures from, and its size. */ | |
4226 | ||
4227 | static struct run *run_pool; | |
0065d054 | 4228 | static ptrdiff_t runs_size; |
6df5d75f GM |
4229 | |
4230 | /* A vector of runs of lines found during scrolling. */ | |
4231 | ||
4232 | static struct run **runs; | |
4233 | ||
6b1f9ba4 | 4234 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4235 | |
55d4c1b2 | 4236 | static inline struct row_entry * |
6b1f9ba4 | 4237 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4238 | { |
4239 | struct row_entry *entry; | |
ca9ce8f2 | 4240 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4241 | |
6df5d75f | 4242 | entry = row_table[i]; |
6b1f9ba4 | 4243 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4244 | entry = entry->next; |
177c0ea7 | 4245 | |
6df5d75f GM |
4246 | if (entry == NULL) |
4247 | { | |
4248 | entry = row_entry_pool + row_entry_idx++; | |
4249 | entry->row = row; | |
4250 | entry->old_uses = entry->new_uses = 0; | |
4251 | entry->new_line_number = 0; | |
4252 | entry->bucket = i; | |
4253 | entry->next = row_table[i]; | |
4254 | row_table[i] = entry; | |
4255 | } | |
4256 | ||
4257 | return entry; | |
4258 | } | |
4259 | ||
4260 | ||
5f5c8ee5 | 4261 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4262 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4263 | |
4264 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4265 | Technique for Isolating Differences Between Files." It should take | |
4266 | O(N) time. | |
4267 | ||
4268 | A short outline of the steps of the algorithm | |
4269 | ||
4270 | 1. Skip lines equal at the start and end of both matrices. | |
4271 | ||
4272 | 2. Enter rows in the current and desired matrix into a symbol | |
4273 | table, counting how often they appear in both matrices. | |
4274 | ||
4275 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4276 | i.e. we assume that such lines are likely to have been moved. | |
4277 | ||
4278 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4279 | forward and backward. | |
4280 | ||
4281 | Value is | |
4282 | ||
4283 | -1 if all rows were found to be equal. | |
4284 | 0 to indicate that we did not scroll the display, or | |
4285 | 1 if we did scroll. */ | |
4286 | ||
4287 | static int | |
971de7fb | 4288 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4289 | { |
5f5c8ee5 GM |
4290 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4291 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4292 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4293 | ptrdiff_t i; |
4294 | int j, first_old, first_new, last_old, last_new; | |
4295 | int nruns, run_idx; | |
0065d054 | 4296 | ptrdiff_t n; |
6df5d75f | 4297 | struct row_entry *entry; |
fa971ac3 | 4298 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4299 | |
4300 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4301 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4302 | { |
bfdcafe1 GM |
4303 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4304 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4305 | ||
4306 | if (c->enabled_p | |
4307 | && d->enabled_p | |
6b61353c | 4308 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4309 | && c->y == d->y |
4310 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4311 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4312 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4313 | { |
4314 | assign_row (c, d); | |
4315 | d->enabled_p = 0; | |
4316 | } | |
4317 | else | |
4318 | break; | |
5f5c8ee5 | 4319 | } |
4588ec20 | 4320 | |
5f5c8ee5 GM |
4321 | /* Give up if some rows in the desired matrix are not enabled. */ |
4322 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4323 | return -1; | |
177c0ea7 | 4324 | |
5f5c8ee5 GM |
4325 | first_old = first_new = i; |
4326 | ||
4d8ade89 YM |
4327 | /* Set last_new to the index + 1 of the row that reaches the |
4328 | bottom boundary in the desired matrix. Give up if we find a | |
4329 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4330 | i = first_new + 1; |
4d8ade89 YM |
4331 | while (i < desired_matrix->nrows - 1) |
4332 | { | |
4333 | int bottom; | |
5f5c8ee5 | 4334 | |
4d8ade89 YM |
4335 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4336 | return 0; | |
4337 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4338 | if (bottom <= yb) | |
4339 | ++i; | |
4340 | if (bottom >= yb) | |
4341 | break; | |
4342 | } | |
5f5c8ee5 GM |
4343 | |
4344 | last_new = i; | |
4345 | ||
4d8ade89 YM |
4346 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4347 | boundary in the current matrix. We don't look at the enabled | |
4348 | flag here because we plan to reuse part of the display even if | |
4349 | other parts are disabled. */ | |
5f5c8ee5 | 4350 | i = first_old + 1; |
93962bfa GM |
4351 | while (i < current_matrix->nrows - 1) |
4352 | { | |
4353 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4354 | if (bottom <= yb) | |
4355 | ++i; | |
4356 | if (bottom >= yb) | |
4357 | break; | |
4358 | } | |
4359 | ||
5f5c8ee5 GM |
4360 | last_old = i; |
4361 | ||
4362 | /* Skip over rows equal at the bottom. */ | |
4363 | i = last_new; | |
4364 | j = last_old; | |
4365 | while (i - 1 > first_new | |
4366 | && j - 1 > first_old | |
1e5b2111 EZ |
4367 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4368 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4369 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4370 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4371 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4372 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4373 | --i, --j; |
4374 | last_new = i; | |
4375 | last_old = j; | |
4376 | ||
4377 | /* Nothing to do if all rows are equal. */ | |
4378 | if (last_new == first_new) | |
4379 | return 0; | |
4380 | ||
0065d054 | 4381 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4382 | |
4383 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4384 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4385 | So, set next_almost_prime_increment_max to 10. | |
4386 | ||
4387 | It's just a coincidence that next_almost_prime_increment_max == | |
4388 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4389 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4390 | because next_almost_prime (113) would be 127. */ | |
4391 | { | |
4392 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4393 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4394 | ptrdiff_t row_table_max = |
0065d054 PE |
4395 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4396 | - next_almost_prime_increment_max); | |
4397 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4398 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4399 | memory_full (SIZE_MAX); |
4400 | } | |
4401 | ||
6df5d75f | 4402 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4403 | |
6df5d75f | 4404 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4405 | old_lines = xpalloc (old_lines, &old_lines_size, |
4406 | current_matrix->nrows - old_lines_size, | |
4407 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4408 | |
6df5d75f | 4409 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4410 | new_lines = xpalloc (new_lines, &new_lines_size, |
4411 | desired_matrix->nrows - new_lines_size, | |
4412 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4413 | |
ca9ce8f2 PE |
4414 | n = desired_matrix->nrows; |
4415 | n += current_matrix->nrows; | |
0065d054 | 4416 | if (row_table_size < 3 * n) |
6df5d75f | 4417 | { |
ca9ce8f2 | 4418 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4419 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4420 | row_table_size = size; |
0065d054 | 4421 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4422 | } |
4423 | ||
4424 | if (n > row_entry_pool_size) | |
0065d054 PE |
4425 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4426 | n - row_entry_pool_size, | |
4427 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4428 | |
4429 | if (desired_matrix->nrows > runs_size) | |
4430 | { | |
0065d054 PE |
4431 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4432 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4433 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4434 | } |
4435 | ||
4436 | nruns = run_idx = 0; | |
4437 | row_entry_idx = 0; | |
4438 | ||
4439 | /* Add rows from the current and desired matrix to the hash table | |
4440 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4441 | |
5f5c8ee5 GM |
4442 | for (i = first_old; i < last_old; ++i) |
4443 | { | |
4444 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4445 | { | |
6b1f9ba4 | 4446 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4447 | old_lines[i] = entry; |
4448 | ++entry->old_uses; | |
5f5c8ee5 GM |
4449 | } |
4450 | else | |
6df5d75f | 4451 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4452 | } |
4453 | ||
5f5c8ee5 GM |
4454 | for (i = first_new; i < last_new; ++i) |
4455 | { | |
4456 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6b1f9ba4 | 4457 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4458 | ++entry->new_uses; |
4459 | entry->new_line_number = i; | |
4460 | new_lines[i] = entry; | |
5f5c8ee5 | 4461 | } |
4588ec20 | 4462 | |
5f5c8ee5 GM |
4463 | /* Identify moves based on lines that are unique and equal |
4464 | in both matrices. */ | |
4465 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4466 | if (old_lines[i] |
4467 | && old_lines[i]->old_uses == 1 | |
4468 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4469 | { |
27786b2f | 4470 | int p, q; |
6df5d75f GM |
4471 | int new_line = old_lines[i]->new_line_number; |
4472 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4473 | |
4474 | /* Record move. */ | |
4475 | run->current_vpos = i; | |
4476 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4477 | run->desired_vpos = new_line; | |
4478 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4479 | run->nrows = 1; | |
4480 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4481 | ||
4482 | /* Extend backward. */ | |
27786b2f PE |
4483 | p = i - 1; |
4484 | q = new_line - 1; | |
4485 | while (p > first_old | |
4486 | && q > first_new | |
4487 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4488 | { |
27786b2f | 4489 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4490 | --run->current_vpos; |
4491 | --run->desired_vpos; | |
5f5c8ee5 GM |
4492 | ++run->nrows; |
4493 | run->height += h; | |
4494 | run->desired_y -= h; | |
4495 | run->current_y -= h; | |
27786b2f | 4496 | --p, --q; |
5f5c8ee5 | 4497 | } |
4588ec20 | 4498 | |
5f5c8ee5 | 4499 | /* Extend forward. */ |
27786b2f PE |
4500 | p = i + 1; |
4501 | q = new_line + 1; | |
4502 | while (p < last_old | |
4503 | && q < last_new | |
4504 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4505 | { |
27786b2f | 4506 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4507 | ++run->nrows; |
5f5c8ee5 | 4508 | run->height += h; |
27786b2f | 4509 | ++p, ++q; |
5f5c8ee5 | 4510 | } |
19dff8dc | 4511 | |
5f5c8ee5 GM |
4512 | /* Insert run into list of all runs. Order runs by copied |
4513 | pixel lines. Note that we record runs that don't have to | |
4514 | be copied because they are already in place. This is done | |
4515 | because we can avoid calling update_window_line in this | |
4516 | case. */ | |
27786b2f | 4517 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4518 | ; |
27786b2f PE |
4519 | for (q = nruns; q > p; --q) |
4520 | runs[q] = runs[q - 1]; | |
4521 | runs[p] = run; | |
5f5c8ee5 GM |
4522 | ++nruns; |
4523 | ||
4524 | i += run->nrows; | |
4525 | } | |
4526 | else | |
4527 | ++i; | |
4588ec20 | 4528 | |
5f5c8ee5 GM |
4529 | /* Do the moves. Do it in a way that we don't overwrite something |
4530 | we want to copy later on. This is not solvable in general | |
4531 | because there is only one display and we don't have a way to | |
4532 | exchange areas on this display. Example: | |
4588ec20 | 4533 | |
5f5c8ee5 GM |
4534 | +-----------+ +-----------+ |
4535 | | A | | B | | |
4536 | +-----------+ --> +-----------+ | |
4537 | | B | | A | | |
4538 | +-----------+ +-----------+ | |
4588ec20 | 4539 | |
5f5c8ee5 GM |
4540 | Instead, prefer bigger moves, and invalidate moves that would |
4541 | copy from where we copied to. */ | |
ea0d86af | 4542 | |
5f5c8ee5 GM |
4543 | for (i = 0; i < nruns; ++i) |
4544 | if (runs[i]->nrows > 0) | |
4545 | { | |
4546 | struct run *r = runs[i]; | |
24e86043 | 4547 | |
5f5c8ee5 GM |
4548 | /* Copy on the display. */ |
4549 | if (r->current_y != r->desired_y) | |
4550 | { | |
989b42d2 | 4551 | rif->clear_window_mouse_face (w); |
5f5c8ee5 GM |
4552 | rif->scroll_run_hook (w, r); |
4553 | ||
4554 | /* Invalidate runs that copy from where we copied to. */ | |
4555 | for (j = i + 1; j < nruns; ++j) | |
4556 | { | |
4557 | struct run *p = runs[j]; | |
177c0ea7 | 4558 | |
5f5c8ee5 GM |
4559 | if ((p->current_y >= r->desired_y |
4560 | && p->current_y < r->desired_y + r->height) | |
4561 | || (p->current_y + p->height >= r->desired_y | |
4562 | && (p->current_y + p->height | |
4563 | < r->desired_y + r->height))) | |
4564 | p->nrows = 0; | |
4565 | } | |
4566 | } | |
ea0d86af | 4567 | |
5f5c8ee5 GM |
4568 | /* Assign matrix rows. */ |
4569 | for (j = 0; j < r->nrows; ++j) | |
4570 | { | |
4571 | struct glyph_row *from, *to; | |
408f5064 | 4572 | int to_overlapped_p; |
e876ff42 | 4573 | |
5f5c8ee5 GM |
4574 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4575 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4576 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4577 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 GM |
4578 | assign_row (to, from); |
4579 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 4580 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4581 | } |
4582 | } | |
15874c59 | 4583 | |
6df5d75f GM |
4584 | /* Clear the hash table, for the next time. */ |
4585 | for (i = 0; i < row_entry_idx; ++i) | |
4586 | row_table[row_entry_pool[i].bucket] = NULL; | |
4587 | ||
aec1708a PE |
4588 | /* Value is 1 to indicate that we scrolled the display. */ |
4589 | return 0 < nruns; | |
5f5c8ee5 | 4590 | } |
de83c314 | 4591 | |
15874c59 | 4592 | |
4588ec20 | 4593 | \f |
5f5c8ee5 GM |
4594 | /************************************************************************ |
4595 | Frame-Based Updates | |
4596 | ************************************************************************/ | |
4588ec20 | 4597 | |
5f5c8ee5 | 4598 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4599 | |
5f5c8ee5 GM |
4600 | FORCE_P non-zero means that the update should not be stopped by |
4601 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4602 | should not be tried. | |
4603 | ||
4604 | Value is non-zero if update was stopped due to pending input. */ | |
4605 | ||
4606 | static int | |
971de7fb | 4607 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4608 | { |
5f5c8ee5 GM |
4609 | /* Frame matrices to work on. */ |
4610 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4611 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4612 | int i; | |
27786b2f | 4613 | int pause_p; |
4588ec20 | 4614 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 GM |
4615 | |
4616 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4617 | |
c37e4889 RS |
4618 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4619 | calculate_costs (f); | |
4620 | ||
d88c2b9e RS |
4621 | if (preempt_count <= 0) |
4622 | preempt_count = 1; | |
4623 | ||
a2130dbb KS |
4624 | #if !PERIODIC_PREEMPTION_CHECKING |
4625 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4626 | { |
27786b2f | 4627 | pause_p = 1; |
4588ec20 JB |
4628 | goto do_pause; |
4629 | } | |
d012c62b | 4630 | #endif |
4588ec20 | 4631 | |
5f5c8ee5 | 4632 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4633 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4634 | inhibit_id_p = 1; |
7098a0fa | 4635 | |
efb859b4 | 4636 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4637 | i/d line if just want cursor motion. */ |
4638 | for (i = 0; i < desired_matrix->nrows; i++) | |
4639 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4640 | break; |
4641 | ||
4642 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4643 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4644 | force_p |= scrolling (f); | |
4588ec20 JB |
4645 | |
4646 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4647 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4648 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4649 | |
5f5c8ee5 GM |
4650 | /* Now update the rest of the lines. */ |
4651 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4652 | { |
5f5c8ee5 | 4653 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4654 | { |
b6a65ac2 | 4655 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4656 | { |
4657 | /* Flush out every so many lines. | |
4658 | Also flush out if likely to have more than 1k buffered | |
4659 | otherwise. I'm told that some telnet connections get | |
4660 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4661 | FILE *display_output = FRAME_TTY (f)->output; |
4662 | if (display_output) | |
4588ec20 | 4663 | { |
fced92f1 CY |
4664 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4665 | if (outq > 900 | |
4666 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4667 | { |
fced92f1 CY |
4668 | fflush (display_output); |
4669 | if (preempt_count == 1) | |
4670 | { | |
a41f8bed | 4671 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4672 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4673 | /* Probably not a tty. Ignore the error and reset | |
4674 | the outq count. */ | |
4675 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4676 | #endif |
fced92f1 CY |
4677 | outq *= 10; |
4678 | if (baud_rate <= outq && baud_rate > 0) | |
4679 | sleep (outq / baud_rate); | |
4680 | } | |
4588ec20 JB |
4681 | } |
4682 | } | |
4588ec20 JB |
4683 | } |
4684 | ||
d012c62b KS |
4685 | #if PERIODIC_PREEMPTION_CHECKING |
4686 | if (!force_p) | |
4687 | { | |
4688 | EMACS_TIME tm, dif; | |
4689 | EMACS_GET_TIME (tm); | |
4690 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4691 | if (EMACS_TIME_NEG_P (dif)) | |
4692 | { | |
4693 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4694 | if (detect_input_pending_ignore_squeezables ()) |
4695 | break; | |
d012c62b KS |
4696 | } |
4697 | } | |
4698 | #else | |
4699 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4700 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4701 | #endif |
a2960116 | 4702 | |
5f5c8ee5 | 4703 | update_frame_line (f, i); |
4588ec20 | 4704 | } |
4588ec20 | 4705 | } |
177c0ea7 | 4706 | |
27786b2f | 4707 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4708 | |
4709 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4710 | if (!pause_p) |
4588ec20 | 4711 | { |
48cf7030 | 4712 | if ((cursor_in_echo_area |
5f5c8ee5 | 4713 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4714 | show the cursor for the message instead of for the |
5f5c8ee5 | 4715 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4716 | || (EQ (minibuf_window, selected_window) |
4717 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4718 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4719 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4720 | the active mini-buffer window. */ |
2577053b | 4721 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4722 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4723 | { |
7df02016 | 4724 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4725 | int row, col; |
4726 | ||
4727 | if (cursor_in_echo_area < 0) | |
4728 | { | |
5f5c8ee5 GM |
4729 | /* Negative value of cursor_in_echo_area means put |
4730 | cursor at beginning of line. */ | |
648fa17d JB |
4731 | row = top; |
4732 | col = 0; | |
4733 | } | |
1113d9db | 4734 | else |
648fa17d | 4735 | { |
5f5c8ee5 GM |
4736 | /* Positive value of cursor_in_echo_area means put |
4737 | cursor at the end of the prompt. If the mini-buffer | |
4738 | is several lines high, find the last line that has | |
4739 | any text on it. */ | |
7df02016 | 4740 | row = FRAME_LINES (f); |
177c0ea7 | 4741 | do |
648fa17d | 4742 | { |
5f5c8ee5 GM |
4743 | --row; |
4744 | col = 0; | |
177c0ea7 | 4745 | |
5f5c8ee5 GM |
4746 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4747 | { | |
4748 | /* Frame rows are filled up with spaces that | |
4749 | must be ignored here. */ | |
5f5c8ee5 GM |
4750 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4751 | row); | |
4752 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4753 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4754 | ||
4755 | while (last > start | |
4756 | && (last - 1)->charpos < 0) | |
4757 | --last; | |
177c0ea7 | 4758 | |
5f5c8ee5 GM |
4759 | col = last - start; |
4760 | } | |
648fa17d JB |
4761 | } |
4762 | while (row > top && col == 0); | |
4763 | ||
6395da5c | 4764 | /* Make sure COL is not out of range. */ |
868e640e | 4765 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4766 | { |
6395da5c | 4767 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4768 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4769 | { |
7df02016 | 4770 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4771 | row++; |
4772 | } | |
4773 | /* Otherwise move it back in range. */ | |
4774 | else | |
868e640e | 4775 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4776 | } |
4777 | } | |
4778 | ||
385ed61f | 4779 | cursor_to (f, row, col); |
1113d9db | 4780 | } |
4588ec20 | 4781 | else |
5f5c8ee5 GM |
4782 | { |
4783 | /* We have only one cursor on terminal frames. Use it to | |
4784 | display the cursor of the selected window. */ | |
4785 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4786 | if (w->cursor.vpos >= 0 |
4787 | /* The cursor vpos may be temporarily out of bounds | |
4788 | in the following situation: There is one window, | |
4789 | with the cursor in the lower half of it. The window | |
4790 | is split, and a message causes a redisplay before | |
4791 | a new cursor position has been computed. */ | |
7df02016 | 4792 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4793 | { |
4794 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4795 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4796 | ||
7df02016 KS |
4797 | if (INTEGERP (w->left_margin_cols)) |
4798 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4799 | |
7df02016 | 4800 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4801 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4802 | } |
4803 | } | |
4588ec20 JB |
4804 | } |
4805 | ||
ef1b0ba7 | 4806 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4807 | do_pause: |
ef1b0ba7 | 4808 | #endif |
4588ec20 | 4809 | |
5f5c8ee5 | 4810 | clear_desired_matrices (f); |
27786b2f | 4811 | return pause_p; |
4588ec20 JB |
4812 | } |
4813 | ||
4588ec20 | 4814 | |
5f5c8ee5 | 4815 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4816 | |
5bf46f05 | 4817 | static int |
971de7fb | 4818 | scrolling (struct frame *frame) |
4588ec20 JB |
4819 | { |
4820 | int unchanged_at_top, unchanged_at_bottom; | |
4821 | int window_size; | |
4822 | int changed_lines; | |
7df02016 KS |
4823 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4824 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4825 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4826 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4827 | register int i; |
7df02016 | 4828 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4829 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4830 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4831 | |
5f5c8ee5 GM |
4832 | if (!current_matrix) |
4833 | abort (); | |
4588ec20 | 4834 | |
5f5c8ee5 GM |
4835 | /* Compute hash codes of all the lines. Also calculate number of |
4836 | changed lines, number of unchanged lines at the beginning, and | |
4837 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4838 | changed_lines = 0; |
4839 | unchanged_at_top = 0; | |
7df02016 KS |
4840 | unchanged_at_bottom = FRAME_LINES (frame); |
4841 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4842 | { |
4843 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4844 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4845 | return 0; |
5f5c8ee5 GM |
4846 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4847 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4848 | { |
4849 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4850 | new_hash[i] = old_hash[i]; | |
4851 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4852 | draw_cost[i] = INFINITY; | |
4853 | } | |
4588ec20 | 4854 | else |
f188b3c4 | 4855 | { |
5f5c8ee5 GM |
4856 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4857 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4858 | } |
4588ec20 JB |
4859 | |
4860 | if (old_hash[i] != new_hash[i]) | |
4861 | { | |
4862 | changed_lines++; | |
7df02016 | 4863 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4864 | } |
4865 | else if (i == unchanged_at_top) | |
4866 | unchanged_at_top++; | |
5f5c8ee5 | 4867 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4868 | } |
4869 | ||
4870 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4871 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4872 | && changed_lines < baud_rate / 2400) |
7df02016 | 4873 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4874 | return 1; |
4875 | ||
7df02016 | 4876 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4877 | - unchanged_at_bottom); |
4878 | ||
daf01701 | 4879 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4880 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4881 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4882 | free_at_end_vpos = -1; |
4883 | ||
4884 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4885 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4886 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4887 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4888 | && (window_size >= |
4889 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4890 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4891 | old_hash, new_hash, draw_cost))) |
4892 | return 0; | |
4893 | ||
5f5c8ee5 GM |
4894 | if (window_size < 2) |
4895 | return 0; | |
4896 | ||
502b9b64 | 4897 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4898 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4899 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4900 | old_hash + unchanged_at_top - 1, |
4901 | new_hash + unchanged_at_top - 1, | |
4902 | free_at_end_vpos - unchanged_at_top); | |
4903 | ||
4904 | return 0; | |
4905 | } | |
4588ec20 | 4906 | |
4588ec20 | 4907 | |
5f5c8ee5 GM |
4908 | /* Count the number of blanks at the start of the vector of glyphs R |
4909 | which is LEN glyphs long. */ | |
4588ec20 | 4910 | |
4588ec20 | 4911 | static int |
971de7fb | 4912 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4913 | { |
5f5c8ee5 | 4914 | int i; |
177c0ea7 | 4915 | |
5f5c8ee5 GM |
4916 | for (i = 0; i < len; ++i) |
4917 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4918 | break; | |
4919 | ||
4920 | return i; | |
4588ec20 JB |
4921 | } |
4922 | ||
5f5c8ee5 GM |
4923 | |
4924 | /* Count the number of glyphs in common at the start of the glyph | |
4925 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4926 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4927 | ||
4588ec20 | 4928 | static int |
971de7fb | 4929 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4930 | { |
5f5c8ee5 GM |
4931 | struct glyph *p1 = str1; |
4932 | struct glyph *p2 = str2; | |
177c0ea7 | 4933 | |
5f5c8ee5 GM |
4934 | while (p1 < end1 |
4935 | && p2 < end2 | |
42186983 | 4936 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4937 | ++p1, ++p2; |
177c0ea7 | 4938 | |
5f5c8ee5 | 4939 | return p1 - str1; |
4588ec20 JB |
4940 | } |
4941 | ||
5f5c8ee5 | 4942 | |
4588ec20 | 4943 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4944 | |
5e617bc2 | 4945 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4946 | |
5f5c8ee5 GM |
4947 | |
4948 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4949 | ||
4588ec20 | 4950 | static void |
971de7fb | 4951 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4952 | { |
5f5c8ee5 | 4953 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4954 | int tem; |
4955 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4956 | struct glyph_matrix *current_matrix = f->current_matrix; |
4957 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4958 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4959 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4960 | int must_write_whole_line_p; | |
daf01701 | 4961 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4962 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4963 | != FACE_TTY_DEFAULT_BG_COLOR); |
4964 | ||
4965 | if (colored_spaces_p) | |
4966 | write_spaces_p = 1; | |
5f5c8ee5 | 4967 | |
26c63686 GM |
4968 | /* Current row not enabled means it has unknown contents. We must |
4969 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4970 | must_write_whole_line_p = !current_row->enabled_p; |
4971 | if (must_write_whole_line_p) | |
4588ec20 | 4972 | { |
5f5c8ee5 | 4973 | obody = 0; |
4588ec20 JB |
4974 | olen = 0; |
4975 | } | |
4976 | else | |
4977 | { | |
5f5c8ee5 GM |
4978 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4979 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4980 | |
4cecaab8 MB |
4981 | /* Ignore trailing spaces, if we can. */ |
4982 | if (!write_spaces_p) | |
4983 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4984 | olen--; | |
4588ec20 JB |
4985 | } |
4986 | ||
5f5c8ee5 GM |
4987 | current_row->enabled_p = 1; |
4988 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4989 | |
5f5c8ee5 GM |
4990 | /* If desired line is empty, just clear the line. */ |
4991 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4992 | { |
4993 | nlen = 0; | |
4994 | goto just_erase; | |
4995 | } | |
4996 | ||
5f5c8ee5 GM |
4997 | nbody = desired_row->glyphs[TEXT_AREA]; |
4998 | nlen = desired_row->used[TEXT_AREA]; | |
4999 | nend = nbody + nlen; | |
5000 | ||
5001 | /* If display line has unknown contents, write the whole line. */ | |
5002 | if (must_write_whole_line_p) | |
5003 | { | |
26c63686 | 5004 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5005 | if (!write_spaces_p) |
74ca462f GM |
5006 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5007 | --nlen; | |
5008 | ||
26c63686 | 5009 | /* Write the contents of the desired line. */ |
74ca462f | 5010 | if (nlen) |
26c63686 | 5011 | { |
385ed61f KL |
5012 | cursor_to (f, vpos, 0); |
5013 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5014 | } |
177c0ea7 | 5015 | |
26c63686 GM |
5016 | /* Don't call clear_end_of_line if we already wrote the whole |
5017 | line. The cursor will not be at the right margin in that | |
5018 | case but in the line below. */ | |
7df02016 | 5019 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5020 | { |
385ed61f KL |
5021 | cursor_to (f, vpos, nlen); |
5022 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5023 | } |
58827478 GM |
5024 | else |
5025 | /* Make sure we are in the right row, otherwise cursor movement | |
5026 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5027 | cursor_to (f, vpos, 0); |
177c0ea7 | 5028 | |
5f5c8ee5 GM |
5029 | make_current (desired_matrix, current_matrix, vpos); |
5030 | return; | |
5031 | } | |
4588ec20 JB |
5032 | |
5033 | /* Pretend trailing spaces are not there at all, | |
5034 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5035 | if (!write_spaces_p) |
5036 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5037 | nlen--; | |
4588ec20 JB |
5038 | |
5039 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5040 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5041 | { |
5f5c8ee5 | 5042 | int i, j; |
4588ec20 | 5043 | |
5f5c8ee5 GM |
5044 | /* Find the first glyph in desired row that doesn't agree with |
5045 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5046 | for (i = 0; i < nlen; i++) |
5047 | { | |
5f5c8ee5 | 5048 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5049 | { |
5f5c8ee5 GM |
5050 | /* Find the end of the run of different glyphs. */ |
5051 | j = i + 1; | |
5052 | while (j < nlen | |
5053 | && (j >= olen | |
5054 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5055 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5056 | ++j; | |
177c0ea7 JB |
5057 | |
5058 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5059 | cursor_to (f, vpos, i); |
5060 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5061 | i = j - 1; |
4588ec20 JB |
5062 | |
5063 | /* Now find the next non-match. */ | |
5064 | } | |
5065 | } | |
5066 | ||
5067 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5068 | if (olen > nlen) | |
5069 | { | |
385ed61f KL |
5070 | cursor_to (f, vpos, nlen); |
5071 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5072 | } |
5073 | ||
5f5c8ee5 GM |
5074 | /* Make current row = desired row. */ |
5075 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5076 | return; |
5077 | } | |
5078 | ||
5f5c8ee5 GM |
5079 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5080 | characters in a row. */ | |
5081 | ||
4588ec20 JB |
5082 | if (!olen) |
5083 | { | |
5f5c8ee5 GM |
5084 | /* If current line is blank, skip over initial spaces, if |
5085 | possible, and write the rest. */ | |
4cecaab8 | 5086 | if (write_spaces_p) |
5f5c8ee5 GM |
5087 | nsp = 0; |
5088 | else | |
5089 | nsp = count_blanks (nbody, nlen); | |
5090 | ||
4588ec20 JB |
5091 | if (nlen > nsp) |
5092 | { | |
385ed61f KL |
5093 | cursor_to (f, vpos, nsp); |
5094 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5095 | } |
5096 | ||
502b9b64 | 5097 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5098 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5099 | return; |
5100 | } | |
5101 | ||
4588ec20 | 5102 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5103 | osp = count_blanks (obody, olen); |
4cecaab8 | 5104 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5105 | |
5f5c8ee5 GM |
5106 | /* Compute number of matching chars starting with first non-blank. */ |
5107 | begmatch = count_match (obody + osp, obody + olen, | |
5108 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5109 | |
5110 | /* Spaces in new match implicit space past the end of old. */ | |
5111 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5112 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5113 | { |
5114 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5115 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5116 | ++begmatch; | |
4588ec20 JB |
5117 | } |
5118 | ||
5119 | /* Avoid doing insert/delete char | |
5120 | just cause number of leading spaces differs | |
5f5c8ee5 | 5121 | when the following text does not match. */ |
4588ec20 JB |
5122 | if (begmatch == 0 && osp != nsp) |
5123 | osp = nsp = min (osp, nsp); | |
5124 | ||
5125 | /* Find matching characters at end of line */ | |
5126 | op1 = obody + olen; | |
5127 | np1 = nbody + nlen; | |
5128 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5129 | while (op1 > op2 |
5130 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5131 | { |
5132 | op1--; | |
5133 | np1--; | |
5134 | } | |
5135 | endmatch = obody + olen - op1; | |
5136 | ||
4588ec20 JB |
5137 | /* tem gets the distance to insert or delete. |
5138 | endmatch is how many characters we save by doing so. | |
5139 | Is it worth it? */ | |
5140 | ||
5141 | tem = (nlen - nsp) - (olen - osp); | |
5142 | if (endmatch && tem | |
daf01701 | 5143 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5144 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5145 | endmatch = 0; |
5146 | ||
5147 | /* nsp - osp is the distance to insert or delete. | |
5148 | If that is nonzero, begmatch is known to be nonzero also. | |
5149 | begmatch + endmatch is how much we save by doing the ins/del. | |
5150 | Is it worth it? */ | |
5151 | ||
5152 | if (nsp != osp | |
daf01701 | 5153 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5154 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5155 | { |
5156 | begmatch = 0; | |
5157 | endmatch = 0; | |
5158 | osp = nsp = min (osp, nsp); | |
5159 | } | |
5160 | ||
5161 | /* Now go through the line, inserting, writing and | |
5162 | deleting as appropriate. */ | |
5163 | ||
5164 | if (osp > nsp) | |
5165 | { | |
385ed61f KL |
5166 | cursor_to (f, vpos, nsp); |
5167 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5168 | } |
5169 | else if (nsp > osp) | |
5170 | { | |
5171 | /* If going to delete chars later in line | |
5172 | and insert earlier in the line, | |
5173 | must delete first to avoid losing data in the insert */ | |
5174 | if (endmatch && nlen < olen + nsp - osp) | |
5175 | { | |
385ed61f KL |
5176 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5177 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5178 | olen = nlen - (nsp - osp); |
5179 | } | |
385ed61f KL |
5180 | cursor_to (f, vpos, osp); |
5181 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5182 | } |
5183 | olen += nsp - osp; | |
5184 | ||
5185 | tem = nsp + begmatch + endmatch; | |
5186 | if (nlen != tem || olen != tem) | |
5187 | { | |
4588ec20 JB |
5188 | if (!endmatch || nlen == olen) |
5189 | { | |
c363a1d6 GM |
5190 | /* If new text being written reaches right margin, there is |
5191 | no need to do clear-to-eol at the end of this function | |
5192 | (and it would not be safe, since cursor is not going to | |
5193 | be "at the margin" after the text is done). */ | |
7df02016 | 5194 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5195 | olen = 0; |
c363a1d6 GM |
5196 | |
5197 | /* Function write_glyphs is prepared to do nothing | |
5198 | if passed a length <= 0. Check it here to avoid | |
5199 | unnecessary cursor movement. */ | |
5200 | if (nlen - tem > 0) | |
5201 | { | |
385ed61f KL |
5202 | cursor_to (f, vpos, nsp + begmatch); |
5203 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5204 | } |
4588ec20 JB |
5205 | } |
5206 | else if (nlen > olen) | |
5207 | { | |
24e86043 KH |
5208 | /* Here, we used to have the following simple code: |
5209 | ---------------------------------------- | |
5210 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5211 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5212 | ---------------------------------------- | |
5213 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5214 | is a padding glyph. */ | |
5215 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5216 | int del; | |
5f5c8ee5 | 5217 | |
385ed61f | 5218 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5219 | |
5f5c8ee5 | 5220 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5221 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5222 | out--; | |
385ed61f | 5223 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5224 | |
5f5c8ee5 GM |
5225 | /* If we left columns to be overwritten, we must delete them. */ |
5226 | del = olen - tem - out; | |
c363a1d6 | 5227 | if (del > 0) |
385ed61f | 5228 | delete_glyphs (f, del); |
177c0ea7 | 5229 | |
5f5c8ee5 | 5230 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5231 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5232 | olen = nlen; |
5233 | } | |
5234 | else if (olen > nlen) | |
5235 | { | |
385ed61f KL |
5236 | cursor_to (f, vpos, nsp + begmatch); |
5237 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5238 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5239 | olen = nlen; |
5240 | } | |
bd9e3e75 | 5241 | } |
5f5c8ee5 GM |
5242 | |
5243 | just_erase: | |
5244 | /* If any unerased characters remain after the new line, erase them. */ | |
5245 | if (olen > nlen) | |
078b3696 | 5246 | { |
385ed61f KL |
5247 | cursor_to (f, vpos, nlen); |
5248 | clear_end_of_line (f, olen); | |
078b3696 | 5249 | } |
5f5c8ee5 GM |
5250 | |
5251 | /* Exchange contents between current_frame and new_frame. */ | |
5252 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5253 | } |
5f5c8ee5 GM |
5254 | |
5255 | ||
078b3696 | 5256 | \f |
5f5c8ee5 GM |
5257 | /*********************************************************************** |
5258 | X/Y Position -> Buffer Position | |
5259 | ***********************************************************************/ | |
5260 | ||
a1b0a6db | 5261 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5262 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5263 | Return in *POS the position in that object. |
2396cbba EZ |
5264 | Adjust *X and *Y to character positions. |
5265 | Return in *DX and *DY the pixel coordinates of the click, | |
5266 | relative to the top left corner of OBJECT, or relative to | |
5267 | the top left corner of the character glyph at (*X, *Y) | |
5268 | if OBJECT is nil. | |
5269 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5270 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5271 | |
6b61353c | 5272 | Lisp_Object |
971de7fb | 5273 | buffer_posn_from_coords (struct window *w, int *x, int *y, struct display_pos *pos, Lisp_Object *object, int *dx, int *dy, int *width, int *height) |
4588ec20 | 5274 | { |
5f5c8ee5 | 5275 | struct it it; |
707ea971 | 5276 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5277 | struct text_pos startp; |
6b61353c KH |
5278 | Lisp_Object string; |
5279 | struct glyph_row *row; | |
cedd7cd9 KS |
5280 | #ifdef HAVE_WINDOW_SYSTEM |
5281 | struct image *img = 0; | |
5282 | #endif | |
2396cbba | 5283 | int x0, x1, to_x; |
57b3e30b | 5284 | void *itdata = NULL; |
5f5c8ee5 | 5285 | |
707ea971 CY |
5286 | /* We used to set current_buffer directly here, but that does the |
5287 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5288 | Fset_buffer (w->buffer); | |
57b3e30b | 5289 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5290 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5291 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5292 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5293 | start_display (&it, w, startp); | |
352ec8ff EZ |
5294 | /* start_display takes into account the header-line row, but IT's |
5295 | vpos still counts from the glyph row that includes the window's | |
5296 | start position. Adjust for a possible header-line row. */ | |
5297 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; | |
177c0ea7 | 5298 | |
9173a8fb | 5299 | x0 = *x; |
2396cbba EZ |
5300 | |
5301 | /* First, move to the beginning of the row corresponding to *Y. We | |
5302 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5303 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5304 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5305 | ||
5306 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5307 | glyph at *X. We add it.first_visible_x because iterator |
5308 | positions include the hscroll. */ | |
2396cbba EZ |
5309 | to_x = x0 + it.first_visible_x; |
5310 | if (it.bidi_it.paragraph_dir == R2L) | |
5311 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5312 | text area. This is because the iterator, even in R2L | |
5313 | paragraphs, delivers glyphs as if they started at the left | |
5314 | margin of the window. (When we actually produce glyphs for | |
5315 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5316 | iterator doesn't know about that.) The following line adjusts | |
5317 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5318 | move_it_* routines use. (The -1 is because in a window whose |
5319 | text-area width is W, the rightmost pixel position is W-1, and | |
5320 | it should be mirrored into zero pixel position.) */ | |
5321 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5322 | ||
5323 | /* Now move horizontally in the row to the glyph under *X. Second | |
5324 | argument is ZV to prevent move_it_in_display_line from matching | |
5325 | based on buffer positions. */ | |
2396cbba | 5326 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5327 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5328 | |
707ea971 | 5329 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5330 | |
6b61353c KH |
5331 | *dx = x0 + it.first_visible_x - it.current_x; |
5332 | *dy = *y - it.current_y; | |
5333 | ||
5334 | string = w->buffer; | |
5335 | if (STRINGP (it.string)) | |
5336 | string = it.string; | |
a1b0a6db | 5337 | *pos = it.current; |
86282aab KH |
5338 | if (it.what == IT_COMPOSITION |
5339 | && it.cmp_it.nchars > 1 | |
5340 | && it.cmp_it.reversed_p) | |
5341 | { | |
5342 | /* The current display element is a grapheme cluster in a | |
5343 | composition. In that case, we need the position of the first | |
5344 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5345 | it.current points to the last character of the cluster, thus | |
5346 | we must move back to the first character of the same | |
5347 | cluster. */ | |
5348 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5349 | if (STRINGP (it.string)) | |
5350 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5351 | else | |
425cc014 EZ |
5352 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5353 | CHARPOS (pos->pos)); | |
86282aab | 5354 | } |
6b61353c KH |
5355 | |
5356 | #ifdef HAVE_WINDOW_SYSTEM | |
5357 | if (it.what == IT_IMAGE) | |
5358 | { | |
6b61353c KH |
5359 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5360 | && !NILP (img->spec)) | |
5361 | *object = img->spec; | |
5362 | } | |
5363 | #endif | |
5364 | ||
b70d98e1 KS |
5365 | if (it.vpos < w->current_matrix->nrows |
5366 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5367 | row->enabled_p)) | |
6b61353c KH |
5368 | { |
5369 | if (it.hpos < row->used[TEXT_AREA]) | |
5370 | { | |
5371 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5372 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5373 | if (img) |
5374 | { | |
5375 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5376 | *dx += glyph->slice.img.x; |
5377 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5378 | /* Image slices positions are still relative to the entire image */ |
5379 | *width = img->width; | |
5380 | *height = img->height; | |
5381 | } | |
5382 | else | |
6b61353c | 5383 | #endif |
cedd7cd9 KS |
5384 | { |
5385 | *width = glyph->pixel_width; | |
5386 | *height = glyph->ascent + glyph->descent; | |
5387 | } | |
6b61353c KH |
5388 | } |
5389 | else | |
5390 | { | |
5391 | *width = 0; | |
5392 | *height = row->height; | |
5393 | } | |
5394 | } | |
5395 | else | |
5396 | { | |
5397 | *width = *height = 0; | |
5398 | } | |
5399 | ||
5400 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5401 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5402 | if (x0 > x1) |
5403 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5404 | ||
5405 | *x = it.hpos; | |
5406 | *y = it.vpos; | |
5407 | ||
5408 | return string; | |
5f5c8ee5 | 5409 | } |
4588ec20 | 5410 | |
5f5c8ee5 GM |
5411 | |
5412 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5413 | mode line or header line (PART says which) of window W, or nil if none. |
5414 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5415 | |
5416 | Lisp_Object | |
ace1712c EZ |
5417 | mode_line_string (struct window *w, enum window_part part, |
5418 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5419 | int *dx, int *dy, int *width, int *height) | |
5f5c8ee5 GM |
5420 | { |
5421 | struct glyph_row *row; | |
5422 | struct glyph *glyph, *end; | |
6b61353c | 5423 | int x0, y0; |
5f5c8ee5 GM |
5424 | Lisp_Object string = Qnil; |
5425 | ||
641bdbf3 | 5426 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5427 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5428 | else | |
045dee35 | 5429 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5430 | y0 = *y - row->y; |
5431 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5432 | |
5433 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5434 | { |
5f5c8ee5 GM |
5435 | /* Find the glyph under X. If we find one with a string object, |
5436 | it's the one we were looking for. */ | |
5437 | glyph = row->glyphs[TEXT_AREA]; | |
5438 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5439 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5440 | x0 -= glyph->pixel_width; |
5441 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5442 | if (glyph < end) | |
5443 | { | |
5444 | string = glyph->object; | |
5445 | *charpos = glyph->charpos; | |
5446 | *width = glyph->pixel_width; | |
5447 | *height = glyph->ascent + glyph->descent; | |
5448 | #ifdef HAVE_WINDOW_SYSTEM | |
5449 | if (glyph->type == IMAGE_GLYPH) | |
5450 | { | |
5451 | struct image *img; | |
5452 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5453 | if (img != NULL) | |
5454 | *object = img->spec; | |
5455 | y0 -= row->ascent - glyph->ascent; | |
5456 | } | |
5457 | #endif | |
5458 | } | |
5459 | else | |
5460 | { | |
5461 | /* Add extra (default width) columns if clicked after EOL. */ | |
5462 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5463 | *width = 0; | |
5464 | *height = row->height; | |
5465 | } | |
5466 | } | |
5467 | else | |
5468 | { | |
5469 | *x = 0; | |
5470 | x0 = 0; | |
5471 | *width = *height = 0; | |
4588ec20 | 5472 | } |
5f5c8ee5 | 5473 | |
6b61353c KH |
5474 | *dx = x0; |
5475 | *dy = y0; | |
5476 | ||
5f5c8ee5 | 5477 | return string; |
4588ec20 | 5478 | } |
5f5c8ee5 GM |
5479 | |
5480 | ||
db1db309 GM |
5481 | /* Value is the string under window-relative coordinates X/Y in either |
5482 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5483 | the string returned. */ | |
5484 | ||
5485 | Lisp_Object | |
ace1712c EZ |
5486 | marginal_area_string (struct window *w, enum window_part part, |
5487 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5488 | int *dx, int *dy, int *width, int *height) | |
db1db309 GM |
5489 | { |
5490 | struct glyph_row *row = w->current_matrix->rows; | |
5491 | struct glyph *glyph, *end; | |
6b61353c | 5492 | int x0, y0, i, wy = *y; |
641bdbf3 | 5493 | int area; |
db1db309 GM |
5494 | Lisp_Object string = Qnil; |
5495 | ||
641bdbf3 | 5496 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5497 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5498 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5499 | area = RIGHT_MARGIN_AREA; |
5500 | else | |
5501 | abort (); | |
5502 | ||
5503 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5504 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5505 | break; | |
6b61353c KH |
5506 | y0 = *y - row->y; |
5507 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5508 | |
5509 | if (row->enabled_p) | |
5510 | { | |
5511 | /* Find the glyph under X. If we find one with a string object, | |
5512 | it's the one we were looking for. */ | |
db1db309 | 5513 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5514 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5515 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5516 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5517 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5518 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5519 | else |
7df02016 | 5520 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5521 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5522 | : 0); |
5523 | ||
6b61353c KH |
5524 | glyph = row->glyphs[area]; |
5525 | end = glyph + row->used[area]; | |
cfde341f | 5526 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5527 | x0 -= glyph->pixel_width; |
5528 | *x = glyph - row->glyphs[area]; | |
5529 | if (glyph < end) | |
5530 | { | |
5531 | string = glyph->object; | |
5532 | *charpos = glyph->charpos; | |
5533 | *width = glyph->pixel_width; | |
5534 | *height = glyph->ascent + glyph->descent; | |
5535 | #ifdef HAVE_WINDOW_SYSTEM | |
5536 | if (glyph->type == IMAGE_GLYPH) | |
5537 | { | |
5538 | struct image *img; | |
5539 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5540 | if (img != NULL) | |
5541 | *object = img->spec; | |
5542 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5543 | x0 += glyph->slice.img.x; |
5544 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5545 | } |
5546 | #endif | |
5547 | } | |
5548 | else | |
5549 | { | |
5550 | /* Add extra (default width) columns if clicked after EOL. */ | |
5551 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5552 | *width = 0; | |
5553 | *height = row->height; | |
5554 | } | |
db1db309 | 5555 | } |
6b61353c KH |
5556 | else |
5557 | { | |
5558 | x0 = 0; | |
5559 | *x = 0; | |
5560 | *width = *height = 0; | |
5561 | } | |
5562 | ||
5563 | *dx = x0; | |
5564 | *dy = y0; | |
db1db309 GM |
5565 | |
5566 | return string; | |
5567 | } | |
5568 | ||
5569 | ||
5f5c8ee5 GM |
5570 | /*********************************************************************** |
5571 | Changing Frame Sizes | |
5572 | ***********************************************************************/ | |
4588ec20 JB |
5573 | |
5574 | #ifdef SIGWINCH | |
5f5c8ee5 | 5575 | |
9af30bdf | 5576 | static void |
971de7fb DN |
5577 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5578 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5579 | { |
5580 | int width, height; | |
4588ec20 JB |
5581 | int old_errno = errno; |
5582 | ||
28d7d09f | 5583 | struct tty_display_info *tty; |
4d553a13 | 5584 | |
333f1b6f JD |
5585 | signal (SIGWINCH, window_change_signal); |
5586 | SIGNAL_THREAD_CHECK (signalnum); | |
5587 | ||
9628b887 KL |
5588 | /* The frame size change obviously applies to a single |
5589 | termcap-controlled terminal, but we can't decide which. | |
5590 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5591 | */ |
5592 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5593 | |
0a125897 KL |
5594 | if (! tty->term_initted) |
5595 | continue; | |
4588ec20 | 5596 | |
db878925 DN |
5597 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5598 | use it. */ | |
5599 | if (!tty->input) | |
5600 | continue; | |
5601 | ||
0b0d3e0b | 5602 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5603 | |
bedeffcf | 5604 | if (width > 5 && height > 2) { |
9628b887 | 5605 | Lisp_Object tail, frame; |
3fc809e2 | 5606 | |
9628b887 | 5607 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5608 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5609 | /* Record the new sizes, but don't reallocate the data | |
5610 | structures now. Let that be done later outside of the | |
5611 | signal handler. */ | |
5612 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5613 | } |
4588ec20 | 5614 | } |
3fc809e2 | 5615 | |
4588ec20 JB |
5616 | errno = old_errno; |
5617 | } | |
5618 | #endif /* SIGWINCH */ | |
5619 | ||
5620 | ||
b96fd3e8 GM |
5621 | /* Do any change in frame size that was requested by a signal. SAFE |
5622 | non-zero means this function is called from a place where it is | |
5623 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5624 | |
dfcf069d | 5625 | void |
971de7fb | 5626 | do_pending_window_change (int safe) |
4588ec20 JB |
5627 | { |
5628 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5629 | if (redisplaying_p && !safe) |
5630 | return; | |
177c0ea7 | 5631 | |
4588ec20 JB |
5632 | while (delayed_size_change) |
5633 | { | |
35f56f96 | 5634 | Lisp_Object tail, frame; |
4588ec20 JB |
5635 | |
5636 | delayed_size_change = 0; | |
5637 | ||
35f56f96 | 5638 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5639 | { |
5f5c8ee5 | 5640 | struct frame *f = XFRAME (frame); |
35f56f96 | 5641 | |
7df02016 KS |
5642 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5643 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5644 | 0, 0, safe); | |
4588ec20 JB |
5645 | } |
5646 | } | |
5647 | } | |
5648 | ||
5649 | ||
502b9b64 | 5650 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5651 | indicate no change is to take place. |
4588ec20 | 5652 | |
b6a65ac2 JB |
5653 | If DELAY is non-zero, then assume we're being called from a signal |
5654 | handler, and queue the change for later - perhaps the next | |
5655 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5656 | from a signal handler. |
5657 | ||
5658 | SAFE non-zero means this function is called from a place where it's | |
5659 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5660 | |
dfcf069d | 5661 | void |
971de7fb | 5662 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5663 | { |
5664 | Lisp_Object tail, frame; | |
3826ea1a | 5665 | |
9628b887 | 5666 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5667 | { |
9628b887 KL |
5668 | /* On MS-DOS, all frames use the same screen, so a change in |
5669 | size affects all frames. Termcap now supports multiple | |
5670 | ttys. */ | |
45140e01 | 5671 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5672 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5673 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5674 | pretend, delay, safe); |
45140e01 RS |
5675 | } |
5676 | else | |
b96fd3e8 | 5677 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5678 | } |
5679 | ||
5680 | static void | |
971de7fb | 5681 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5682 | { |
7df02016 | 5683 | int new_frame_total_cols; |
aed13378 | 5684 | int count = SPECPDL_INDEX (); |
3826ea1a | 5685 | |
4588ec20 | 5686 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5687 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5688 | { |
7df02016 KS |
5689 | f->new_text_lines = newheight; |
5690 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5691 | delayed_size_change = 1; |
5692 | return; | |
5693 | } | |
5694 | ||
502b9b64 | 5695 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5696 | f->new_text_lines = 0; |
5697 | f->new_text_cols = 0; | |
b6a65ac2 | 5698 | |
08f7aa3e | 5699 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5700 | if (newheight == 0) |
7df02016 | 5701 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5702 | if (newwidth == 0) |
7df02016 | 5703 | newwidth = FRAME_COLS (f); |
3826ea1a | 5704 | |
5f5c8ee5 GM |
5705 | /* Compute width of windows in F. |
5706 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5707 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5708 | |
b6a65ac2 | 5709 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5710 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5711 | |
5712 | /* If we're not changing the frame size, quit now. */ | |
5075d853 JD |
5713 | /* Frame width may be unchanged but the text portion may change, for example, |
5714 | fullscreen and remove/add scroll bar. */ | |
7df02016 | 5715 | if (newheight == FRAME_LINES (f) |
5075d853 JD |
5716 | && newwidth == FRAME_COLS (f) // text portion unchanged |
5717 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) // frame width unchanged | |
4588ec20 JB |
5718 | return; |
5719 | ||
cbb95688 RS |
5720 | BLOCK_INPUT; |
5721 | ||
886a8a6c KH |
5722 | #ifdef MSDOS |
5723 | /* We only can set screen dimensions to certain values supported | |
5724 | by our video hardware. Try to find the smallest size greater | |
5725 | or equal to the requested dimensions. */ | |
5726 | dos_set_window_size (&newheight, &newwidth); | |
5727 | #endif | |
5728 | ||
7df02016 | 5729 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5730 | { |
562dd5e9 | 5731 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5732 | |
48e482e6 EZ |
5733 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5734 | manipulating video hardware. */ | |
5735 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5736 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5737 | } |
5738 | ||
7df02016 | 5739 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5740 | { |
562dd5e9 | 5741 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5742 | |
48e482e6 EZ |
5743 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5744 | manipulating video hardware. */ | |
5745 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5746 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5747 | |
9ea173e8 | 5748 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5749 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5750 | } |
5751 | ||
7df02016 KS |
5752 | FRAME_LINES (f) = newheight; |
5753 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5754 | |
5f5c8ee5 GM |
5755 | { |
5756 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5757 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5758 | |
5f5c8ee5 GM |
5759 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5760 | &text_area_height); | |
5761 | if (w->cursor.x >= text_area_x + text_area_width) | |
5762 | w->cursor.hpos = w->cursor.x = 0; | |
5763 | if (w->cursor.y >= text_area_y + text_area_height) | |
5764 | w->cursor.vpos = w->cursor.y = 0; | |
5765 | } | |
986e61b8 | 5766 | |
5f5c8ee5 | 5767 | adjust_glyphs (f); |
5f5c8ee5 | 5768 | calculate_costs (f); |
cb02fa39 GM |
5769 | SET_FRAME_GARBAGED (f); |
5770 | f->resized_p = 1; | |
97cf50e7 RS |
5771 | |
5772 | UNBLOCK_INPUT; | |
61730a69 | 5773 | |
e523f7e5 RS |
5774 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5775 | ||
ef264c42 | 5776 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5777 | |
5778 | unbind_to (count, Qnil); | |
4588ec20 | 5779 | } |
5f5c8ee5 GM |
5780 | |
5781 | ||
4588ec20 | 5782 | \f |
5f5c8ee5 GM |
5783 | /*********************************************************************** |
5784 | Terminal Related Lisp Functions | |
5785 | ***********************************************************************/ | |
5786 | ||
5787 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5788 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5789 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5790 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5791 | (Lisp_Object file) |
5f5c8ee5 | 5792 | { |
0b0d3e0b KL |
5793 | struct tty_display_info *tty; |
5794 | ||
7d2f1216 EZ |
5795 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5796 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5797 | error ("Current frame is not on a tty device"); |
5798 | ||
5799 | tty = CURTTY (); | |
5800 | ||
5801 | if (tty->termscript != 0) | |
e18c7093 KL |
5802 | { |
5803 | BLOCK_INPUT; | |
0b0d3e0b | 5804 | fclose (tty->termscript); |
e18c7093 KL |
5805 | UNBLOCK_INPUT; |
5806 | } | |
0b0d3e0b | 5807 | tty->termscript = 0; |
5f5c8ee5 GM |
5808 | |
5809 | if (! NILP (file)) | |
5810 | { | |
5811 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5812 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5813 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5814 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5815 | } | |
5816 | return Qnil; | |
5817 | } | |
5818 | ||
5819 | ||
4588ec20 | 5820 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5821 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5822 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5823 | Control characters in STRING will have terminal-dependent effects. |
5824 | ||
6ed8eeff | 5825 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5826 | It may be a terminal object, a frame, or nil for the terminal used by |
5827 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5828 | when TERMINAL is nil. */) | |
5842a27b | 5829 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5830 | { |
7cef7ce3 SM |
5831 | struct terminal *t = get_terminal (terminal, 1); |
5832 | FILE *out; | |
0b0d3e0b | 5833 | |
94f3db62 | 5834 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5835 | CHECK_STRING (string); |
2c1e4409 | 5836 | BLOCK_INPUT; |
0b0d3e0b | 5837 | |
6ed8eeff KL |
5838 | if (!t) |
5839 | error ("Unknown terminal device"); | |
0b0d3e0b | 5840 | |
7cef7ce3 SM |
5841 | if (t->type == output_initial) |
5842 | out = stdout; | |
5843 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5844 | error ("Device %d is not a termcap terminal device", t->id); | |
5845 | else | |
5846 | { | |
5847 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5848 | |
7cef7ce3 SM |
5849 | if (! tty->output) |
5850 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5851 | |
7cef7ce3 SM |
5852 | if (tty->termscript) |
5853 | { | |
5854 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5855 | fflush (tty->termscript); | |
5856 | } | |
5857 | out = tty->output; | |
4588ec20 | 5858 | } |
7cef7ce3 SM |
5859 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5860 | fflush (out); | |
2c1e4409 | 5861 | UNBLOCK_INPUT; |
4588ec20 JB |
5862 | return Qnil; |
5863 | } | |
5864 | ||
5f5c8ee5 | 5865 | |
a7ca3326 | 5866 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5867 | doc: /* Beep, or flash the screen. |
228299fa | 5868 | Also, unless an argument is given, |
7ee72033 | 5869 | terminate any keyboard macro currently executing. */) |
5842a27b | 5870 | (Lisp_Object arg) |
4588ec20 | 5871 | { |
efb859b4 | 5872 | if (!NILP (arg)) |
4588ec20 | 5873 | { |
7fa788da RS |
5874 | if (noninteractive) |
5875 | putchar (07); | |
5876 | else | |
385ed61f | 5877 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5878 | } |
5879 | else | |
5880 | bitch_at_user (); | |
5881 | ||
5882 | return Qnil; | |
5883 | } | |
5884 | ||
dfcf069d | 5885 | void |
971de7fb | 5886 | bitch_at_user (void) |
4588ec20 JB |
5887 | { |
5888 | if (noninteractive) | |
5889 | putchar (07); | |
5f5c8ee5 | 5890 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5891 | error ("Keyboard macro terminated by a command ringing the bell"); |
5892 | else | |
385ed61f | 5893 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5894 | } |
5895 | ||
5f5c8ee5 GM |
5896 | |
5897 | \f | |
5898 | /*********************************************************************** | |
5899 | Sleeping, Waiting | |
5900 | ***********************************************************************/ | |
5901 | ||
a7ca3326 | 5902 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5903 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5904 | SECONDS may be a floating-point value, meaning that you can wait for a |
5905 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5906 | additional wait period, in milliseconds; this may be useful if your | |
5907 | Emacs was built without floating point support. | |
7ee72033 | 5908 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5909 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5910 | { |
767229f8 | 5911 | int sec, usec; |
4588ec20 | 5912 | |
767229f8 | 5913 | if (NILP (milliseconds)) |
e9c9a718 | 5914 | XSETINT (milliseconds, 0); |
767229f8 | 5915 | else |
b7826503 | 5916 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
5917 | usec = XINT (milliseconds) * 1000; |
5918 | ||
b07646f5 JB |
5919 | { |
5920 | double duration = extract_float (seconds); | |
5921 | sec = (int) duration; | |
5922 | usec += (duration - sec) * 1000000; | |
5923 | } | |
4588ec20 | 5924 | |
a41f8bed | 5925 | #ifndef EMACS_HAS_USECS |
767229f8 | 5926 | if (sec == 0 && usec != 0) |
861e19b9 | 5927 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 5928 | #endif |
767229f8 JB |
5929 | |
5930 | /* Assure that 0 <= usec < 1000000. */ | |
5931 | if (usec < 0) | |
5932 | { | |
153a073c | 5933 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
5934 | if (-1000000 < usec) |
5935 | sec--, usec += 1000000; | |
5936 | else | |
5937 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 5938 | } |
767229f8 JB |
5939 | else |
5940 | sec += usec / 1000000, usec %= 1000000; | |
5941 | ||
6b5153b1 | 5942 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 5943 | return Qnil; |
4588ec20 | 5944 | |
dcd1ca45 | 5945 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
5946 | |
5947 | return Qnil; | |
5948 | } | |
5949 | ||
5f5c8ee5 | 5950 | |
dcd1ca45 | 5951 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5952 | it does redisplay. |
f76475ad | 5953 | |
2bcac766 CY |
5954 | TIMEOUT is number of seconds to wait (float or integer), |
5955 | or t to wait forever. | |
902b9b6d KS |
5956 | READING is 1 if reading input. |
5957 | If DO_DISPLAY is >0 display process output while waiting. | |
5958 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5959 | */ | |
4588ec20 | 5960 | |
f76475ad | 5961 | Lisp_Object |
971de7fb | 5962 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 5963 | { |
902b9b6d | 5964 | int sec, usec; |
f222369e | 5965 | |
902b9b6d | 5966 | swallow_events (do_display); |
ccddf474 | 5967 | |
902b9b6d | 5968 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5969 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5970 | return Qnil; |
4588ec20 | 5971 | |
902b9b6d KS |
5972 | if (do_display >= 2) |
5973 | redisplay_preserve_echo_area (2); | |
5974 | ||
8e09f23f | 5975 | if (INTEGERP (timeout)) |
f222369e | 5976 | { |
7ff14773 | 5977 | sec = XINT (timeout); |
8e09f23f | 5978 | usec = 0; |
f222369e | 5979 | } |
8e09f23f KS |
5980 | else if (FLOATP (timeout)) |
5981 | { | |
99a20368 | 5982 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
5983 | sec = (int) seconds; |
5984 | usec = (int) ((seconds - sec) * 1000000); | |
5985 | } | |
2bcac766 CY |
5986 | else if (EQ (timeout, Qt)) |
5987 | { | |
5988 | sec = 0; | |
5989 | usec = 0; | |
5990 | } | |
902b9b6d | 5991 | else |
8e09f23f | 5992 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 5993 | |
2bcac766 | 5994 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
5995 | return Qt; |
5996 | ||
4588ec20 | 5997 | #ifdef SIGIO |
8fc798e9 | 5998 | gobble_input (0); |
f76475ad JB |
5999 | #endif |
6000 | ||
902b9b6d | 6001 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6002 | Qnil, NULL, 0); |
f76475ad | 6003 | |
4588ec20 JB |
6004 | return detect_input_pending () ? Qnil : Qt; |
6005 | } | |
6006 | ||
5f5c8ee5 | 6007 | |
a7ca3326 | 6008 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
01327edf | 6009 | doc: /* Perform redisplay if no input is available. |
a5c2c707 | 6010 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
6011 | perform a full redisplay even if input is available. |
6012 | Return t if redisplay was performed, nil otherwise. */) | |
5842a27b | 6013 | (Lisp_Object force) |
f76475ad | 6014 | { |
01327edf | 6015 | int count; |
659d9874 | 6016 | |
902b9b6d KS |
6017 | swallow_events (1); |
6018 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6019 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6020 | || !NILP (Vexecuting_kbd_macro)) |
6021 | return Qnil; | |
f76475ad | 6022 | |
01327edf KS |
6023 | count = SPECPDL_INDEX (); |
6024 | if (!NILP (force) && !redisplay_dont_pause) | |
6025 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6026 | redisplay_preserve_echo_area (2); |
01327edf | 6027 | unbind_to (count, Qnil); |
7ba07a1a | 6028 | return Qt; |
f76475ad | 6029 | } |
5f5c8ee5 GM |
6030 | |
6031 | ||
6032 | \f | |
6033 | /*********************************************************************** | |
6034 | Other Lisp Functions | |
6035 | ***********************************************************************/ | |
6036 | ||
6037 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6038 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6039 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6040 | |
6041 | static Lisp_Object frame_and_buffer_state; | |
6042 | ||
6043 | ||
6044 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6045 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6046 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6047 | VARIABLE is a variable name whose value is either nil or a state vector |
6048 | that will be updated to contain all frames and buffers, | |
228299fa | 6049 | aside from buffers whose names start with space, |
44edd521 RS |
6050 | along with the buffers' read-only and modified flags. This allows a fast |
6051 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6052 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6053 | the current state. |
6054 | ||
6055 | If VARIABLE is nil, an internal variable is used. Users should not | |
6056 | pass nil for VARIABLE. */) | |
5842a27b | 6057 | (Lisp_Object variable) |
5f5c8ee5 | 6058 | { |
44edd521 RS |
6059 | Lisp_Object state, tail, frame, buf; |
6060 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6061 | int n; |
6062 | ||
44edd521 RS |
6063 | if (! NILP (variable)) |
6064 | { | |
6065 | CHECK_SYMBOL (variable); | |
6066 | state = Fsymbol_value (variable); | |
6067 | if (! VECTORP (state)) | |
6068 | goto changed; | |
6069 | } | |
6070 | else | |
6071 | state = frame_and_buffer_state; | |
6072 | ||
6073 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6074 | end = vecp + ASIZE (state); |
44edd521 | 6075 | |
5f5c8ee5 GM |
6076 | FOR_EACH_FRAME (tail, frame) |
6077 | { | |
44edd521 RS |
6078 | if (vecp == end) |
6079 | goto changed; | |
5f5c8ee5 GM |
6080 | if (!EQ (*vecp++, frame)) |
6081 | goto changed; | |
44edd521 RS |
6082 | if (vecp == end) |
6083 | goto changed; | |
5f5c8ee5 GM |
6084 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6085 | goto changed; | |
6086 | } | |
44edd521 | 6087 | /* Check that the buffer info matches. */ |
7539e11f | 6088 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6089 | { |
7539e11f | 6090 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6091 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6092 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6093 | continue; |
44edd521 RS |
6094 | if (vecp == end) |
6095 | goto changed; | |
5f5c8ee5 GM |
6096 | if (!EQ (*vecp++, buf)) |
6097 | goto changed; | |
44edd521 RS |
6098 | if (vecp == end) |
6099 | goto changed; | |
4b4deea2 | 6100 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6101 | goto changed; |
44edd521 RS |
6102 | if (vecp == end) |
6103 | goto changed; | |
5f5c8ee5 GM |
6104 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6105 | goto changed; | |
6106 | } | |
44edd521 RS |
6107 | if (vecp == end) |
6108 | goto changed; | |
5f5c8ee5 GM |
6109 | /* Detect deletion of a buffer at the end of the list. */ |
6110 | if (EQ (*vecp, Qlambda)) | |
6111 | return Qnil; | |
44edd521 RS |
6112 | |
6113 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6114 | changed: |
44edd521 RS |
6115 | /* Count the size we will need. |
6116 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6117 | n = 1; |
6118 | FOR_EACH_FRAME (tail, frame) | |
6119 | n += 2; | |
7539e11f | 6120 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6121 | n += 3; |
44edd521 RS |
6122 | /* Reallocate the vector if data has grown to need it, |
6123 | or if it has shrunk a lot. */ | |
6124 | if (! VECTORP (state) | |
77b37c05 PE |
6125 | || n > ASIZE (state) |
6126 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6127 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6128 | { |
6129 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6130 | if (! NILP (variable)) | |
6131 | Fset (variable, state); | |
6132 | else | |
6133 | frame_and_buffer_state = state; | |
6134 | } | |
6135 | ||
6136 | /* Record the new data in the (possibly reallocated) vector. */ | |
6137 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6138 | FOR_EACH_FRAME (tail, frame) |
6139 | { | |
6140 | *vecp++ = frame; | |
6141 | *vecp++ = XFRAME (frame)->name; | |
6142 | } | |
7539e11f | 6143 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6144 | { |
7539e11f | 6145 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6146 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6147 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6148 | continue; |
6149 | *vecp++ = buf; | |
4b4deea2 | 6150 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6151 | *vecp++ = Fbuffer_modified_p (buf); |
6152 | } | |
6153 | /* Fill up the vector with lambdas (always at least one). */ | |
6154 | *vecp++ = Qlambda; | |
44edd521 | 6155 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6156 | < ASIZE (state)) |
5f5c8ee5 GM |
6157 | *vecp++ = Qlambda; |
6158 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6159 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6160 | > ASIZE (state)) |
5f5c8ee5 GM |
6161 | abort (); |
6162 | return Qt; | |
6163 | } | |
6164 | ||
6165 | ||
4588ec20 | 6166 | \f |
5f5c8ee5 GM |
6167 | /*********************************************************************** |
6168 | Initialization | |
6169 | ***********************************************************************/ | |
6170 | ||
5f5c8ee5 GM |
6171 | /* Initialization done when Emacs fork is started, before doing stty. |
6172 | Determine terminal type and set terminal_driver. Then invoke its | |
6173 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6174 | |
dfcf069d | 6175 | void |
971de7fb | 6176 | init_display (void) |
4588ec20 | 6177 | { |
28d440ab KL |
6178 | char *terminal_type; |
6179 | ||
5f5c8ee5 GM |
6180 | /* Construct the space glyph. */ |
6181 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6182 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6183 | space_glyph.charpos = -1; |
6184 | ||
4588ec20 JB |
6185 | inverse_video = 0; |
6186 | cursor_in_echo_area = 0; | |
6187 | terminal_type = (char *) 0; | |
6188 | ||
1315c181 JB |
6189 | /* Now is the time to initialize this; it's used by init_sys_modes |
6190 | during startup. */ | |
2246281f | 6191 | Vinitial_window_system = Qnil; |
4588ec20 | 6192 | |
4181ad9c KL |
6193 | /* SIGWINCH needs to be handled no matter what display we start |
6194 | with. Otherwise newly opened tty frames will not resize | |
6195 | automatically. */ | |
6196 | #ifdef SIGWINCH | |
6197 | #ifndef CANNOT_DUMP | |
6198 | if (initialized) | |
6199 | #endif /* CANNOT_DUMP */ | |
6200 | signal (SIGWINCH, window_change_signal); | |
6201 | #endif /* SIGWINCH */ | |
4588ec20 | 6202 | |
d6ef42b9 | 6203 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6204 | if (IS_DAEMON) |
6205 | return; | |
d6ef42b9 | 6206 | |
1315c181 JB |
6207 | /* If the user wants to use a window system, we shouldn't bother |
6208 | initializing the terminal. This is especially important when the | |
6209 | terminal is so dumb that emacs gives up before and doesn't bother | |
6210 | using the window system. | |
4588ec20 | 6211 | |
36bbad1d KH |
6212 | If the DISPLAY environment variable is set and nonempty, |
6213 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6214 | |
6215 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6216 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6217 | { |
36bbad1d | 6218 | char *display; |
36bbad1d | 6219 | display = getenv ("DISPLAY"); |
36bbad1d | 6220 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6221 | |
6222 | if (display_arg && !x_display_ok (display)) | |
6223 | { | |
6224 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6225 | display); | |
6226 | inhibit_window_system = 1; | |
6227 | } | |
f040093a | 6228 | } |
d460af17 | 6229 | |
4fcc2638 | 6230 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6231 | { |
111d9af3 | 6232 | Vinitial_window_system = Qx; |
4588ec20 JB |
6233 | #ifdef HAVE_X11 |
6234 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6235 | #endif |
8a2a6032 | 6236 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6237 | /* In some versions of ncurses, |
6a428f77 | 6238 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6239 | So call tgetent. */ |
6240 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6241 | #endif |
5f5c8ee5 | 6242 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6243 | return; |
6244 | } | |
6245 | #endif /* HAVE_X_WINDOWS */ | |
6246 | ||
fd2e066a | 6247 | #ifdef HAVE_NTGUI |
177c0ea7 | 6248 | if (!inhibit_window_system) |
fd2e066a | 6249 | { |
111d9af3 | 6250 | Vinitial_window_system = Qw32; |
fd2e066a | 6251 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6252 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6253 | return; |
6254 | } | |
6255 | #endif /* HAVE_NTGUI */ | |
6256 | ||
edfda783 AR |
6257 | #ifdef HAVE_NS |
6258 | if (!inhibit_window_system | |
6259 | #ifndef CANNOT_DUMP | |
6260 | && initialized | |
6261 | #endif | |
6262 | ) | |
6263 | { | |
111d9af3 | 6264 | Vinitial_window_system = Qns; |
5e617bc2 | 6265 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6266 | adjust_frame_glyphs_initially (); |
6267 | return; | |
6268 | } | |
6269 | #endif | |
6270 | ||
4588ec20 JB |
6271 | /* If no window system has been specified, try to use the terminal. */ |
6272 | if (! isatty (0)) | |
6273 | { | |
1559a86d | 6274 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6275 | exit (1); |
6276 | } | |
6277 | ||
6152361f JR |
6278 | #ifdef WINDOWSNT |
6279 | terminal_type = "w32console"; | |
6280 | #else | |
153a073c | 6281 | /* Look at the TERM variable. */ |
4588ec20 | 6282 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6283 | #endif |
4588ec20 JB |
6284 | if (!terminal_type) |
6285 | { | |
5d12ff0b | 6286 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6287 | if (! inhibit_window_system) |
6288 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6289 | else |
6290 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6291 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6292 | exit (1); |
6293 | } | |
6294 | ||
0a125897 | 6295 | { |
6ed8eeff | 6296 | struct terminal *t; |
3224dac1 KL |
6297 | struct frame *f = XFRAME (selected_frame); |
6298 | ||
6299 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6300 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6301 | |
6302 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6303 | if (f->output_method != output_initial) |
3224dac1 | 6304 | abort (); |
6ed8eeff KL |
6305 | f->output_method = t->type; |
6306 | f->terminal = t; | |
3224dac1 | 6307 | |
6ed8eeff | 6308 | t->reference_count++; |
7ac5dac9 EZ |
6309 | #ifdef MSDOS |
6310 | f->output_data.tty->display_info = &the_only_display_info; | |
6311 | #else | |
6312 | if (f->output_method == output_termcap) | |
6313 | create_tty_output (f); | |
6314 | #endif | |
6ed8eeff | 6315 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6316 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6317 | FrameRows (t->display_info.tty), |
6318 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6319 | |
6ed8eeff KL |
6320 | /* Delete the initial terminal. */ |
6321 | if (--initial_terminal->reference_count == 0 | |
6322 | && initial_terminal->delete_terminal_hook) | |
6323 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6324 | |
6325 | /* Update frame parameters to reflect the new type. */ | |
6326 | Fmodify_frame_parameters | |
6327 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6328 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6329 | if (t->display_info.tty->name) |
6330 | Fmodify_frame_parameters (selected_frame, | |
6331 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6332 | Qnil)); | |
6333 | else | |
6334 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6335 | Qnil)); | |
0a125897 | 6336 | } |
3fc809e2 | 6337 | |
d86c299a | 6338 | { |
91fb7e1b | 6339 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6340 | int width = FRAME_TOTAL_COLS (sf); |
6341 | int height = FRAME_LINES (sf); | |
d86c299a | 6342 | |
5f5c8ee5 | 6343 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6344 | change. It's not clear what better we could do. The rest of |
6345 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6346 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6347 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6348 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6349 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6350 | < (width + 2) * height)) | |
1559a86d | 6351 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6352 | } |
6353 | ||
5f5c8ee5 | 6354 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6355 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6356 | |
5f5c8ee5 GM |
6357 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6358 | if (initialized | |
6359 | && !noninteractive | |
2246281f | 6360 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6361 | { |
6362 | /* For the initial frame, we don't have any way of knowing what | |
6363 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6364 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6365 | |
f9d2fdc4 EZ |
6366 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6367 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6368 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6369 | } | |
5f5c8ee5 GM |
6370 | } |
6371 | ||
6372 | ||
6373 | \f | |
6374 | /*********************************************************************** | |
6375 | Blinking cursor | |
6376 | ***********************************************************************/ | |
6377 | ||
c3f13540 | 6378 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6379 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6380 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6381 | WINDOW nil means use the selected window. SHOW non-nil means |
6382 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6383 | don't show a cursor. */) |
5842a27b | 6384 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6385 | { |
5f5c8ee5 GM |
6386 | /* Don't change cursor state while redisplaying. This could confuse |
6387 | output routines. */ | |
6388 | if (!redisplaying_p) | |
6389 | { | |
6390 | if (NILP (window)) | |
6391 | window = selected_window; | |
6392 | else | |
b7826503 | 6393 | CHECK_WINDOW (window); |
177c0ea7 | 6394 | |
5d7791b3 | 6395 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6396 | } |
6397 | ||
6398 | return Qnil; | |
4588ec20 | 6399 | } |
5f5c8ee5 GM |
6400 | |
6401 | ||
5d7791b3 GM |
6402 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6403 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6404 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6405 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6406 | (Lisp_Object window) |
5d7791b3 GM |
6407 | { |
6408 | struct window *w; | |
177c0ea7 | 6409 | |
5d7791b3 GM |
6410 | if (NILP (window)) |
6411 | window = selected_window; | |
6412 | else | |
b7826503 | 6413 | CHECK_WINDOW (window); |
177c0ea7 | 6414 | |
5d7791b3 | 6415 | w = XWINDOW (window); |
177c0ea7 | 6416 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6417 | } |
6418 | ||
87478b52 SM |
6419 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6420 | Slast_nonminibuf_frame, 0, 0, 0, | |
6421 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6422 | (void) |
87478b52 | 6423 | { |
4958ed94 | 6424 | Lisp_Object frame = Qnil; |
87478b52 | 6425 | |
4958ed94 SM |
6426 | if (last_nonminibuf_frame) |
6427 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6428 | |
6429 | return frame; | |
6430 | } | |
4588ec20 | 6431 | \f |
5f5c8ee5 GM |
6432 | /*********************************************************************** |
6433 | Initialization | |
6434 | ***********************************************************************/ | |
6435 | ||
dfcf069d | 6436 | void |
971de7fb | 6437 | syms_of_display (void) |
4588ec20 | 6438 | { |
502b9b64 | 6439 | defsubr (&Sredraw_frame); |
4588ec20 | 6440 | defsubr (&Sredraw_display); |
078b3696 | 6441 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6442 | defsubr (&Sopen_termscript); |
6443 | defsubr (&Sding); | |
7ba07a1a | 6444 | defsubr (&Sredisplay); |
4588ec20 JB |
6445 | defsubr (&Ssleep_for); |
6446 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6447 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6448 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6449 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6450 | |
2d5912c1 | 6451 | #if GLYPH_DEBUG |
9b0e97aa GM |
6452 | defsubr (&Sdump_redisplay_history); |
6453 | #endif | |
6454 | ||
d1dad759 | 6455 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6456 | staticpro (&frame_and_buffer_state); |
6457 | ||
cd3520a4 JB |
6458 | DEFSYM (Qdisplay_table, "display-table"); |
6459 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6460 | |
29208e82 | 6461 | DEFVAR_INT ("baud-rate", baud_rate, |
bacf09b4 | 6462 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6463 | On most systems, changing this value will affect the amount of padding |
6464 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6465 | |
29208e82 | 6466 | DEFVAR_BOOL ("inverse-video", inverse_video, |
bacf09b4 | 6467 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6468 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6469 | |
29208e82 | 6470 | DEFVAR_BOOL ("visible-bell", visible_bell, |
bacf09b4 | 6471 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6472 | |
6473 | See also `ring-bell-function'. */); | |
177c0ea7 | 6474 | |
29208e82 | 6475 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
bacf09b4 | 6476 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6477 | A non-nil value is useful if the terminal can automatically preserve |
6478 | Emacs's frame display when you reenter Emacs. | |
6479 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6480 | |
29208e82 | 6481 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6482 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6483 | The value is a symbol: |
6484 | nil for a termcap frame (a character-only terminal), | |
6485 | 'x' for an Emacs frame that is really an X window, | |
6486 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6487 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6488 | 'pc' for a direct-write MS-DOS frame. | |
6489 | ||
6490 | Use of this variable as a boolean is deprecated. Instead, | |
6491 | use `display-graphic-p' or any of the other `display-*-p' | |
6492 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6493 | |
70b8d0a4 SM |
6494 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6495 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6496 | The value is a symbol: |
6497 | nil for a termcap frame (a character-only terminal), | |
6498 | 'x' for an Emacs frame that is really an X window, | |
6499 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6500 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6501 | 'pc' for a direct-write MS-DOS frame. | |
6502 | ||
6503 | Use of this variable as a boolean is deprecated. Instead, | |
6504 | use `display-graphic-p' or any of the other `display-*-p' | |
6505 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6506 | |
29208e82 | 6507 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6508 | doc: /* The version number of the window system in use. |
c22140f6 | 6509 | For X windows, this is 11. */); |
177c0ea7 | 6510 | |
29208e82 | 6511 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6512 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6513 | |
29208e82 | 6514 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6515 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6516 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6517 | Each element can be: | |
6518 | integer: a glyph code which this glyph is an alias for. | |
6519 | string: output this glyph using that string (not impl. in X windows). | |
6520 | nil: this glyph mod 524288 is the code of a character to output, | |
6521 | and this glyph / 524288 is the face number (see `face-id') to use | |
6522 | while outputting it. */); | |
4588ec20 JB |
6523 | Vglyph_table = Qnil; |
6524 | ||
29208e82 | 6525 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6526 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6527 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6528 | Vstandard_display_table = Qnil; |
6529 | ||
29208e82 | 6530 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
6bf7006f EZ |
6531 | doc: /* *Non-nil means display update isn't paused when input is detected. */); |
6532 | redisplay_dont_pause = 1; | |
5f5c8ee5 | 6533 | |
d012c62b | 6534 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6535 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
d012c62b KS |
6536 | doc: /* *The period in seconds between checking for input during redisplay. |
6537 | If input is detected, redisplay is pre-empted, and the input is processed. | |
6538 | If nil, never pre-empt redisplay. */); | |
6539 | Vredisplay_preemption_period = make_float (0.10); | |
6540 | #endif | |
6541 | ||
4588ec20 JB |
6542 | #ifdef CANNOT_DUMP |
6543 | if (noninteractive) | |
6544 | #endif | |
6545 | { | |
2246281f | 6546 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6547 | Vwindow_system_version = Qnil; |
6548 | } | |
6549 | } |