Commit | Line | Data |
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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 | ||
8a2a6032 | 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 | |
dfd153ae | 275 | sprintf (buf, "%"pMu": window %p (`%s')%s\n", |
9b0e97aa GM |
276 | history_tick++, |
277 | w, | |
278 | ((BUFFERP (w->buffer) | |
7d7d0045 CY |
279 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) |
280 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
9b0e97aa GM |
281 | : "???"), |
282 | paused_p ? " ***paused***" : ""); | |
283 | strcat (buf, msg); | |
284 | } | |
285 | ||
286 | ||
287 | /* Add to the redisplay history that frame F has been displayed. | |
288 | PAUSED_P non-zero means that the update has been interrupted for | |
289 | pending input. */ | |
290 | ||
291 | static void | |
59fc5cf9 | 292 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
293 | { |
294 | char *buf; | |
177c0ea7 | 295 | |
9b0e97aa GM |
296 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
297 | history_idx = 0; | |
298 | buf = redisplay_history[history_idx].trace; | |
299 | ++history_idx; | |
177c0ea7 | 300 | |
dfd153ae | 301 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
302 | history_tick++, |
303 | f, paused_p ? " ***paused***" : ""); | |
304 | } | |
305 | ||
306 | ||
a7ca3326 | 307 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 308 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 309 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 310 | (void) |
9b0e97aa GM |
311 | { |
312 | int i; | |
313 | ||
314 | for (i = history_idx - 1; i != history_idx; --i) | |
315 | { | |
316 | if (i < 0) | |
317 | i = REDISPLAY_HISTORY_SIZE - 1; | |
318 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
319 | } | |
320 | ||
321 | return Qnil; | |
322 | } | |
323 | ||
324 | ||
5f5c8ee5 | 325 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 326 | |
7df02016 KS |
327 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
328 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 329 | |
5f5c8ee5 | 330 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 331 | |
4588ec20 | 332 | |
dcc19aac | 333 | #if defined PROFILING && !HAVE___EXECUTABLE_START |
72af86bd | 334 | /* FIXME: only used to find text start for profiling. */ |
4588ec20 JB |
335 | |
336 | void | |
971de7fb | 337 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 338 | { |
72af86bd | 339 | abort (); |
177c0ea7 | 340 | } |
72af86bd | 341 | #endif |
5f5c8ee5 GM |
342 | \f |
343 | /*********************************************************************** | |
344 | Glyph Matrices | |
345 | ***********************************************************************/ | |
346 | ||
347 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
348 | pool from which memory for the matrix should be allocated, or null | |
349 | for window-based redisplay where no glyph pools are used. The | |
350 | member `pool' of the glyph matrix structure returned is set to | |
351 | POOL, the structure is otherwise zeroed. */ | |
352 | ||
5bf46f05 | 353 | static struct glyph_matrix * |
971de7fb | 354 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 355 | { |
5f5c8ee5 GM |
356 | struct glyph_matrix *result; |
357 | ||
358 | /* Allocate and clear. */ | |
359 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 360 | memset (result, 0, sizeof *result); |
4588ec20 | 361 | |
5f5c8ee5 GM |
362 | /* Increment number of allocated matrices. This count is used |
363 | to detect memory leaks. */ | |
364 | ++glyph_matrix_count; | |
4588ec20 | 365 | |
5f5c8ee5 GM |
366 | /* Set pool and return. */ |
367 | result->pool = pool; | |
368 | return result; | |
4588ec20 JB |
369 | } |
370 | ||
4588ec20 | 371 | |
5f5c8ee5 GM |
372 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
373 | ||
374 | The global counter glyph_matrix_count is decremented when a matrix | |
375 | is freed. If the count gets negative, more structures were freed | |
376 | than allocated, i.e. one matrix was freed more than once or a bogus | |
377 | pointer was passed to this function. | |
177c0ea7 | 378 | |
5f5c8ee5 GM |
379 | If MATRIX->pool is null, this means that the matrix manages its own |
380 | glyph memory---this is done for matrices on X frames. Freeing the | |
381 | matrix also frees the glyph memory in this case. */ | |
382 | ||
383 | static void | |
971de7fb | 384 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 385 | { |
5f5c8ee5 GM |
386 | if (matrix) |
387 | { | |
388 | int i; | |
389 | ||
390 | /* Detect the case that more matrices are freed than were | |
391 | allocated. */ | |
392 | if (--glyph_matrix_count < 0) | |
393 | abort (); | |
394 | ||
395 | /* Free glyph memory if MATRIX owns it. */ | |
396 | if (matrix->pool == NULL) | |
397 | for (i = 0; i < matrix->rows_allocated; ++i) | |
398 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 399 | |
5f5c8ee5 GM |
400 | /* Free row structures and the matrix itself. */ |
401 | xfree (matrix->rows); | |
402 | xfree (matrix); | |
403 | } | |
404 | } | |
4588ec20 | 405 | |
4588ec20 | 406 | |
5f5c8ee5 GM |
407 | /* Return the number of glyphs to reserve for a marginal area of |
408 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
409 | display line of window W. MARGIN gives the width of the marginal | |
410 | area in canonical character units. MARGIN should be an integer | |
411 | or a float. */ | |
412 | ||
413 | static int | |
971de7fb | 414 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
415 | { |
416 | int n; | |
4588ec20 | 417 | |
5f5c8ee5 | 418 | if (NUMBERP (margin)) |
4588ec20 | 419 | { |
7df02016 | 420 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
421 | double d = max (0, XFLOATINT (margin)); |
422 | d = min (width / 2 - 1, d); | |
35ec832e | 423 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
424 | } |
425 | else | |
426 | n = 0; | |
427 | ||
428 | return n; | |
429 | } | |
430 | ||
4588ec20 | 431 | |
5f5c8ee5 GM |
432 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
433 | window sizes. | |
4588ec20 | 434 | |
5f5c8ee5 GM |
435 | W is null if the function is called for a frame glyph matrix. |
436 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
437 | indices of the first column and row of MATRIX within the frame | |
438 | matrix, if such a matrix exists. They are zero for purely | |
439 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 440 | |
5f5c8ee5 GM |
441 | In window-based redisplay, where no frame matrices exist, glyph |
442 | matrices manage their own glyph storage. Otherwise, they allocate | |
443 | storage from a common frame glyph pool which can be found in | |
444 | MATRIX->pool. | |
23b0200c | 445 | |
5f5c8ee5 GM |
446 | The reason for this memory management strategy is to avoid complete |
447 | frame redraws if possible. When we allocate from a common pool, a | |
448 | change of the location or size of a sub-matrix within the pool | |
449 | requires a complete redisplay of the frame because we cannot easily | |
450 | make sure that the current matrices of all windows still agree with | |
451 | what is displayed on the screen. While this is usually fast, it | |
452 | leads to screen flickering. */ | |
23b0200c | 453 | |
5f5c8ee5 | 454 | static void |
971de7fb | 455 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
456 | { |
457 | int i; | |
458 | int new_rows; | |
459 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
460 | int header_line_changed_p = 0; |
461 | int header_line_p = 0; | |
5f5c8ee5 | 462 | int left = -1, right = -1; |
ca8a12a7 | 463 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 464 | |
6b61353c KH |
465 | /* See if W had a header line that has disappeared now, or vice versa. |
466 | Get W's size. */ | |
5f5c8ee5 GM |
467 | if (w) |
468 | { | |
6b61353c KH |
469 | window_box (w, -1, 0, 0, &window_width, &window_height); |
470 | ||
045dee35 GM |
471 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
472 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 473 | } |
045dee35 | 474 | matrix->header_line_p = header_line_p; |
23b0200c | 475 | |
6b61353c KH |
476 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
477 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
478 | haven't changed. This optimization is important because preserving |
479 | the matrix means preventing redisplay. */ | |
480 | if (matrix->pool == NULL) | |
481 | { | |
7df02016 KS |
482 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
483 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
484 | xassert (left >= 0 && right >= 0); |
485 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
486 | || right != matrix->right_margin_glyphs); | |
487 | ||
488 | if (!marginal_areas_changed_p | |
489 | && !fonts_changed_p | |
045dee35 | 490 | && !header_line_changed_p |
7df02016 KS |
491 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
492 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
493 | && matrix->window_height == window_height |
494 | && matrix->window_vscroll == w->vscroll | |
495 | && matrix->window_width == window_width) | |
496 | return; | |
497 | } | |
177c0ea7 | 498 | |
5f5c8ee5 GM |
499 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
500 | if (matrix->rows_allocated < dim.height) | |
501 | { | |
0065d054 | 502 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 503 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
504 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
505 | new_rows, INT_MAX, sizeof *matrix->rows); | |
506 | memset (matrix->rows + old_alloc, 0, | |
507 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
508 | } |
509 | else | |
510 | new_rows = 0; | |
60a8948a | 511 | |
5f5c8ee5 GM |
512 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
513 | on a frame not using window-based redisplay. Set up pointers for | |
514 | each row into the glyph pool. */ | |
515 | if (matrix->pool) | |
516 | { | |
517 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 518 | |
5f5c8ee5 | 519 | if (w) |
60a8948a | 520 | { |
5f5c8ee5 | 521 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 522 | w->left_margin_cols); |
5f5c8ee5 | 523 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 524 | w->right_margin_cols); |
60a8948a | 525 | } |
5f5c8ee5 GM |
526 | else |
527 | left = right = 0; | |
177c0ea7 | 528 | |
5f5c8ee5 | 529 | for (i = 0; i < dim.height; ++i) |
60a8948a | 530 | { |
5f5c8ee5 | 531 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
532 | |
533 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
534 | = (matrix->pool->glyphs |
535 | + (y + i) * matrix->pool->ncolumns | |
536 | + x); | |
177c0ea7 | 537 | |
5f5c8ee5 GM |
538 | if (w == NULL |
539 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 540 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
541 | { |
542 | row->glyphs[TEXT_AREA] | |
543 | = row->glyphs[LEFT_MARGIN_AREA]; | |
544 | row->glyphs[RIGHT_MARGIN_AREA] | |
545 | = row->glyphs[TEXT_AREA] + dim.width; | |
546 | row->glyphs[LAST_AREA] | |
547 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
548 | } | |
549 | else | |
550 | { | |
551 | row->glyphs[TEXT_AREA] | |
552 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
553 | row->glyphs[RIGHT_MARGIN_AREA] | |
554 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
555 | row->glyphs[LAST_AREA] | |
556 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
557 | } | |
60a8948a | 558 | } |
177c0ea7 | 559 | |
5f5c8ee5 GM |
560 | matrix->left_margin_glyphs = left; |
561 | matrix->right_margin_glyphs = right; | |
562 | } | |
563 | else | |
564 | { | |
565 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
566 | its own memory. It is a window matrix for window-based redisplay. |
567 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
568 | if (dim.width > matrix->matrix_w |
569 | || new_rows | |
045dee35 | 570 | || header_line_changed_p |
5f5c8ee5 | 571 | || marginal_areas_changed_p) |
4588ec20 | 572 | { |
5f5c8ee5 GM |
573 | struct glyph_row *row = matrix->rows; |
574 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 575 | |
5f5c8ee5 GM |
576 | while (row < end) |
577 | { | |
578 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
579 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
580 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 581 | |
5f5c8ee5 GM |
582 | /* The mode line never has marginal areas. */ |
583 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 584 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
585 | { |
586 | row->glyphs[TEXT_AREA] | |
587 | = row->glyphs[LEFT_MARGIN_AREA]; | |
588 | row->glyphs[RIGHT_MARGIN_AREA] | |
589 | = row->glyphs[TEXT_AREA] + dim.width; | |
590 | row->glyphs[LAST_AREA] | |
591 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
592 | } | |
593 | else | |
594 | { | |
595 | row->glyphs[TEXT_AREA] | |
596 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
597 | row->glyphs[RIGHT_MARGIN_AREA] | |
598 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
599 | row->glyphs[LAST_AREA] | |
600 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
601 | } | |
602 | ++row; | |
603 | } | |
4588ec20 JB |
604 | } |
605 | ||
5f5c8ee5 GM |
606 | xassert (left >= 0 && right >= 0); |
607 | matrix->left_margin_glyphs = left; | |
608 | matrix->right_margin_glyphs = right; | |
609 | } | |
177c0ea7 | 610 | |
5f5c8ee5 GM |
611 | /* Number of rows to be used by MATRIX. */ |
612 | matrix->nrows = dim.height; | |
3ed36514 | 613 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 614 | |
b7b20fbd | 615 | if (w) |
5f5c8ee5 | 616 | { |
b7b20fbd | 617 | if (matrix == w->current_matrix) |
4588ec20 | 618 | { |
b7b20fbd GM |
619 | /* Mark rows in a current matrix of a window as not having |
620 | valid contents. It's important to not do this for | |
621 | desired matrices. When Emacs starts, it may already be | |
622 | building desired matrices when this function runs. */ | |
623 | if (window_width < 0) | |
624 | window_width = window_box_width (w, -1); | |
177c0ea7 | 625 | |
b7b20fbd GM |
626 | /* Optimize the case that only the height has changed (C-x 2, |
627 | upper window). Invalidate all rows that are no longer part | |
628 | of the window. */ | |
629 | if (!marginal_areas_changed_p | |
73d75a62 GM |
630 | && !header_line_changed_p |
631 | && new_rows == 0 | |
632 | && dim.width == matrix->matrix_w | |
7df02016 KS |
633 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
634 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 635 | && matrix->window_width == window_width) |
b7b20fbd | 636 | { |
dd42b31a GM |
637 | /* Find the last row in the window. */ |
638 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
639 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
640 | { | |
26447967 | 641 | ++i; |
dd42b31a GM |
642 | break; |
643 | } | |
b7b20fbd GM |
644 | |
645 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 646 | are invalidated below. */ |
b7b20fbd GM |
647 | if (INTEGERP (w->window_end_vpos) |
648 | && XFASTINT (w->window_end_vpos) >= i) | |
649 | w->window_end_valid = Qnil; | |
177c0ea7 | 650 | |
b7b20fbd GM |
651 | while (i < matrix->nrows) |
652 | matrix->rows[i++].enabled_p = 0; | |
653 | } | |
654 | else | |
655 | { | |
656 | for (i = 0; i < matrix->nrows; ++i) | |
657 | matrix->rows[i].enabled_p = 0; | |
658 | } | |
5f5c8ee5 | 659 | } |
b7b20fbd | 660 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 661 | { |
b7b20fbd GM |
662 | /* Rows in desired matrices always have to be cleared; |
663 | redisplay expects this is the case when it runs, so it | |
664 | had better be the case when we adjust matrices between | |
665 | redisplays. */ | |
5f5c8ee5 GM |
666 | for (i = 0; i < matrix->nrows; ++i) |
667 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 668 | } |
4588ec20 | 669 | } |
177c0ea7 JB |
670 | |
671 | ||
5f5c8ee5 GM |
672 | /* Remember last values to be able to optimize frame redraws. */ |
673 | matrix->matrix_x = x; | |
674 | matrix->matrix_y = y; | |
675 | matrix->matrix_w = dim.width; | |
676 | matrix->matrix_h = dim.height; | |
677 | ||
678 | /* Record the top y location and height of W at the time the matrix | |
679 | was last adjusted. This is used to optimize redisplay above. */ | |
680 | if (w) | |
4588ec20 | 681 | { |
7df02016 KS |
682 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
683 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
684 | matrix->window_height = window_height; |
685 | matrix->window_width = window_width; | |
686 | matrix->window_vscroll = w->vscroll; | |
687 | } | |
688 | } | |
4588ec20 | 689 | |
4588ec20 | 690 | |
5f5c8ee5 GM |
691 | /* Reverse the contents of rows in MATRIX between START and END. The |
692 | contents of the row at END - 1 end up at START, END - 2 at START + | |
693 | 1 etc. This is part of the implementation of rotate_matrix (see | |
694 | below). */ | |
d52bad65 | 695 | |
5f5c8ee5 | 696 | static void |
971de7fb | 697 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
698 | { |
699 | int i, j; | |
23b0200c | 700 | |
5f5c8ee5 GM |
701 | for (i = start, j = end - 1; i < j; ++i, --j) |
702 | { | |
703 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
704 | initialization. */ | |
705 | struct glyph_row temp; | |
706 | temp = matrix->rows[i]; | |
707 | matrix->rows[i] = matrix->rows[j]; | |
708 | matrix->rows[j] = temp; | |
709 | } | |
710 | } | |
23b0200c | 711 | |
23b0200c | 712 | |
5f5c8ee5 GM |
713 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
714 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
715 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
716 | row structures are moved around). | |
60a8948a | 717 | |
5f5c8ee5 GM |
718 | The algorithm used for rotating the vector was, I believe, first |
719 | described by Kernighan. See the vector R as consisting of two | |
720 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
721 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
722 | and reverse the result to get (ArBr)r which is BA. Similar for | |
723 | rotating right. */ | |
724 | ||
725 | void | |
971de7fb | 726 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
727 | { |
728 | if (by < 0) | |
729 | { | |
730 | /* Up (rotate left, i.e. towards lower indices). */ | |
731 | by = -by; | |
732 | reverse_rows (matrix, first, first + by); | |
733 | reverse_rows (matrix, first + by, last); | |
734 | reverse_rows (matrix, first, last); | |
735 | } | |
736 | else if (by > 0) | |
737 | { | |
738 | /* Down (rotate right, i.e. towards higher indices). */ | |
739 | reverse_rows (matrix, last - by, last); | |
740 | reverse_rows (matrix, first, last - by); | |
741 | reverse_rows (matrix, first, last); | |
742 | } | |
743 | } | |
744 | ||
745 | ||
746 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
747 | with indices START <= index < END. Increment positions by DELTA/ | |
748 | DELTA_BYTES. */ | |
749 | ||
750 | void | |
ace1712c EZ |
751 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
752 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
753 | { |
754 | /* Check that START and END are reasonable values. */ | |
755 | xassert (start >= 0 && start <= matrix->nrows); | |
756 | xassert (end >= 0 && end <= matrix->nrows); | |
757 | xassert (start <= end); | |
758 | ||
759 | for (; start < end; ++start) | |
86c11ba1 | 760 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
761 | } |
762 | ||
763 | ||
764 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
765 | the row indices of the first and last + 1 row to enable. If | |
766 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
767 | ||
768 | void | |
971de7fb | 769 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 770 | { |
3ed36514 GM |
771 | xassert (start <= end); |
772 | xassert (start >= 0 && start < matrix->nrows); | |
773 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 774 | |
5f5c8ee5 GM |
775 | for (; start < end; ++start) |
776 | matrix->rows[start].enabled_p = enabled_p != 0; | |
777 | } | |
778 | ||
779 | ||
780 | /* Clear MATRIX. | |
781 | ||
782 | This empties all rows in MATRIX by setting the enabled_p flag for | |
783 | all rows of the matrix to zero. The function prepare_desired_row | |
784 | will eventually really clear a row when it sees one with a zero | |
785 | enabled_p flag. | |
786 | ||
787 | Resets update hints to defaults value. The only update hint | |
788 | currently present is the flag MATRIX->no_scrolling_p. */ | |
789 | ||
790 | void | |
971de7fb | 791 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
792 | { |
793 | if (matrix) | |
794 | { | |
795 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
796 | matrix->no_scrolling_p = 0; | |
797 | } | |
798 | } | |
177c0ea7 | 799 | |
5f5c8ee5 GM |
800 | |
801 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
802 | Increment y-positions in glyph rows between START and END by DY, | |
803 | and recompute their visible height. */ | |
804 | ||
805 | void | |
971de7fb | 806 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
807 | { |
808 | int min_y, max_y; | |
177c0ea7 | 809 | |
5f5c8ee5 GM |
810 | xassert (start <= end); |
811 | xassert (start >= 0 && start < matrix->nrows); | |
812 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 813 | |
7df02016 KS |
814 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
815 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 816 | |
5f5c8ee5 GM |
817 | for (; start < end; ++start) |
818 | { | |
819 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 820 | |
5f5c8ee5 | 821 | row->y += dy; |
d6c747a4 | 822 | row->visible_height = row->height; |
177c0ea7 | 823 | |
5f5c8ee5 | 824 | if (row->y < min_y) |
d6c747a4 GM |
825 | row->visible_height -= min_y - row->y; |
826 | if (row->y + row->height > max_y) | |
827 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
828 | if (row->fringe_bitmap_periodic_p) |
829 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
830 | } |
831 | } | |
832 | ||
833 | ||
834 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
835 | invalid is done by setting enabled_p to zero for all rows in a | |
836 | current matrix. */ | |
837 | ||
838 | void | |
971de7fb | 839 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
840 | { |
841 | /* Clear frame current matrix, if we have one. */ | |
842 | if (f->current_matrix) | |
843 | clear_glyph_matrix (f->current_matrix); | |
844 | ||
845 | /* Clear the matrix of the menu bar window, if such a window exists. | |
846 | The menu bar window is currently used to display menus on X when | |
847 | no toolkit support is compiled in. */ | |
848 | if (WINDOWP (f->menu_bar_window)) | |
849 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
850 | ||
9ea173e8 GM |
851 | /* Clear the matrix of the tool-bar window, if any. */ |
852 | if (WINDOWP (f->tool_bar_window)) | |
853 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
854 | |
855 | /* Clear current window matrices. */ | |
856 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
857 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
858 | } | |
859 | ||
860 | ||
861 | /* Clear out all display lines of F for a coming redisplay. */ | |
862 | ||
863 | void | |
971de7fb | 864 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
865 | { |
866 | if (f->desired_matrix) | |
867 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 868 | |
5f5c8ee5 GM |
869 | if (WINDOWP (f->menu_bar_window)) |
870 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
871 | ||
9ea173e8 GM |
872 | if (WINDOWP (f->tool_bar_window)) |
873 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
874 | |
875 | /* Do it for window matrices. */ | |
876 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
877 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
878 | } | |
879 | ||
880 | ||
881 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
882 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
883 | ||
884 | static void | |
971de7fb | 885 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
886 | { |
887 | while (w) | |
888 | { | |
889 | if (!NILP (w->hchild)) | |
890 | { | |
891 | xassert (WINDOWP (w->hchild)); | |
892 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
893 | } | |
894 | else if (!NILP (w->vchild)) | |
895 | { | |
896 | xassert (WINDOWP (w->vchild)); | |
897 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
898 | } | |
899 | else | |
900 | { | |
901 | if (desired_p) | |
902 | clear_glyph_matrix (w->desired_matrix); | |
903 | else | |
904 | { | |
905 | clear_glyph_matrix (w->current_matrix); | |
906 | w->window_end_valid = Qnil; | |
907 | } | |
908 | } | |
909 | ||
910 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
911 | } | |
912 | } | |
913 | ||
914 | ||
915 | \f | |
916 | /*********************************************************************** | |
917 | Glyph Rows | |
918 | ||
919 | See dispextern.h for an overall explanation of glyph rows. | |
920 | ***********************************************************************/ | |
921 | ||
922 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
923 | changes in the glyph_row structure, i.e. addition or removal of | |
924 | structure members. */ | |
925 | ||
2cca872d KH |
926 | static struct glyph_row null_row; |
927 | ||
5f5c8ee5 | 928 | void |
971de7fb | 929 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
930 | { |
931 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
932 | |
933 | /* Save pointers. */ | |
934 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
935 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
936 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
937 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
938 | ||
939 | /* Clear. */ | |
940 | *row = null_row; | |
941 | ||
942 | /* Restore pointers. */ | |
943 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
944 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
945 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
946 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
947 | |
948 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
949 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
950 | Redisplay outputs such glyphs, and flickering effects were | |
951 | the result. This also depended on the contents of memory | |
952 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 953 | the code below. If the flickering is gone with that, chances |
45560b1a | 954 | are that the flickering has the same reason as here. */ |
72af86bd | 955 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 956 | #endif |
5f5c8ee5 GM |
957 | } |
958 | ||
959 | ||
960 | /* Make ROW an empty, enabled row of canonical character height, | |
961 | in window W starting at y-position Y. */ | |
962 | ||
963 | void | |
971de7fb | 964 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
965 | { |
966 | int min_y, max_y; | |
177c0ea7 | 967 | |
7df02016 KS |
968 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
969 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 970 | |
5f5c8ee5 GM |
971 | clear_glyph_row (row); |
972 | row->y = y; | |
408f5064 | 973 | row->ascent = row->phys_ascent = 0; |
7df02016 | 974 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 975 | row->visible_height = row->height; |
177c0ea7 | 976 | |
5f5c8ee5 | 977 | if (row->y < min_y) |
d6c747a4 GM |
978 | row->visible_height -= min_y - row->y; |
979 | if (row->y + row->height > max_y) | |
980 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
981 | |
982 | row->enabled_p = 1; | |
983 | } | |
984 | ||
985 | ||
986 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
987 | are the amounts by which to change positions. Note that the first | |
988 | glyph of the text area of a row can have a buffer position even if | |
989 | the used count of the text area is zero. Such rows display line | |
990 | ends. */ | |
991 | ||
5bf46f05 | 992 | static void |
ace1712c EZ |
993 | increment_row_positions (struct glyph_row *row, |
994 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
995 | { |
996 | int area, i; | |
997 | ||
998 | /* Increment start and end positions. */ | |
999 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1000 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1001 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1002 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1003 | CHARPOS (row->start.pos) += delta; |
1004 | BYTEPOS (row->start.pos) += delta_bytes; | |
1005 | CHARPOS (row->end.pos) += delta; | |
1006 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1007 | |
5cacdcfd KS |
1008 | if (!row->enabled_p) |
1009 | return; | |
1010 | ||
5f5c8ee5 GM |
1011 | /* Increment positions in glyphs. */ |
1012 | for (area = 0; area < LAST_AREA; ++area) | |
1013 | for (i = 0; i < row->used[area]; ++i) | |
1014 | if (BUFFERP (row->glyphs[area][i].object) | |
1015 | && row->glyphs[area][i].charpos > 0) | |
1016 | row->glyphs[area][i].charpos += delta; | |
1017 | ||
1018 | /* Capture the case of rows displaying a line end. */ | |
1019 | if (row->used[TEXT_AREA] == 0 | |
1020 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1021 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1022 | } | |
1023 | ||
1024 | ||
9af3e742 | 1025 | #if 0 |
5f5c8ee5 GM |
1026 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1027 | contents, i.e. glyph structure contents are exchanged between A and | |
1028 | B without changing glyph pointers in A and B. */ | |
1029 | ||
1030 | static void | |
1dae0f0a | 1031 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1032 | { |
1033 | int area; | |
1034 | ||
1035 | for (area = 0; area < LAST_AREA; ++area) | |
1036 | { | |
1037 | /* Number of glyphs to swap. */ | |
1038 | int max_used = max (a->used[area], b->used[area]); | |
1039 | ||
1040 | /* Start of glyphs in area of row A. */ | |
1041 | struct glyph *glyph_a = a->glyphs[area]; | |
1042 | ||
1043 | /* End + 1 of glyphs in area of row A. */ | |
1044 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1045 | ||
1046 | /* Start of glyphs in area of row B. */ | |
1047 | struct glyph *glyph_b = b->glyphs[area]; | |
1048 | ||
1049 | while (glyph_a < glyph_a_end) | |
1050 | { | |
1051 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1052 | initialization. */ | |
1053 | struct glyph temp; | |
1054 | temp = *glyph_a; | |
1055 | *glyph_a = *glyph_b; | |
1056 | *glyph_b = temp; | |
1057 | ++glyph_a; | |
1058 | ++glyph_b; | |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | ||
9af3e742 | 1063 | #endif /* 0 */ |
5f5c8ee5 GM |
1064 | |
1065 | /* Exchange pointers to glyph memory between glyph rows A and B. */ | |
1066 | ||
55d4c1b2 | 1067 | static inline void |
971de7fb | 1068 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1069 | { |
1070 | int i; | |
1071 | for (i = 0; i < LAST_AREA + 1; ++i) | |
1072 | { | |
1073 | struct glyph *temp = a->glyphs[i]; | |
1074 | a->glyphs[i] = b->glyphs[i]; | |
1075 | b->glyphs[i] = temp; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | ||
1080 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
1081 | that glyph pointers in the structures are left unchanged. */ | |
1082 | ||
55d4c1b2 | 1083 | static inline void |
971de7fb | 1084 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1085 | { |
1086 | struct glyph *pointers[1 + LAST_AREA]; | |
1087 | ||
1088 | /* Save glyph pointers of TO. */ | |
72af86bd | 1089 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
5f5c8ee5 GM |
1090 | |
1091 | /* Do a structure assignment. */ | |
1092 | *to = *from; | |
1093 | ||
1094 | /* Restore original pointers of TO. */ | |
72af86bd | 1095 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
5f5c8ee5 GM |
1096 | } |
1097 | ||
1098 | ||
5f5c8ee5 GM |
1099 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1100 | assignment TO = FROM, except that glyph pointers are not copied but | |
1101 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1102 | a memory leak. */ | |
1103 | ||
55d4c1b2 | 1104 | static inline void |
971de7fb | 1105 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1106 | { |
1107 | swap_glyph_pointers (to, from); | |
1108 | copy_row_except_pointers (to, from); | |
1109 | } | |
1110 | ||
1111 | ||
1112 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1113 | a row in a window matrix, is a slice of the glyph memory of the | |
1114 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1115 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1116 | memory of FRAME_ROW. */ | |
1117 | ||
2d5912c1 | 1118 | #if GLYPH_DEBUG |
9339e87f | 1119 | |
5f5c8ee5 | 1120 | static int |
59fc5cf9 | 1121 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1122 | { |
1123 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1124 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1125 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1126 | ||
1127 | return (frame_glyph_start <= window_glyph_start | |
1128 | && window_glyph_start < frame_glyph_end); | |
1129 | } | |
1130 | ||
9339e87f | 1131 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1132 | |
9af3e742 GM |
1133 | #if 0 |
1134 | ||
5f5c8ee5 GM |
1135 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1136 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1137 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1138 | ||
1139 | static struct glyph_row * | |
59fc5cf9 AS |
1140 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1141 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1142 | { |
1143 | int i; | |
1144 | ||
1145 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1146 | ||
1147 | for (i = 0; i < window_matrix->nrows; ++i) | |
1148 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1149 | frame_matrix->rows + row)) | |
1150 | break; | |
1151 | ||
1152 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1153 | } | |
1154 | ||
9af3e742 | 1155 | #endif /* 0 */ |
5f5c8ee5 GM |
1156 | |
1157 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1158 | i.e. they are only marked as to be cleared by setting their | |
1159 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1160 | call to this function really clears it. */ | |
1161 | ||
1162 | void | |
971de7fb | 1163 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1164 | { |
1165 | if (!row->enabled_p) | |
1166 | { | |
dfd153ae | 1167 | int rp = row->reversed_p; |
5009f85e | 1168 | |
5f5c8ee5 GM |
1169 | clear_glyph_row (row); |
1170 | row->enabled_p = 1; | |
5009f85e | 1171 | row->reversed_p = rp; |
5f5c8ee5 GM |
1172 | } |
1173 | } | |
1174 | ||
1175 | ||
1176 | /* Return a hash code for glyph row ROW. */ | |
1177 | ||
2f7c71a1 | 1178 | static int |
971de7fb | 1179 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1180 | { |
1181 | int hash = 0; | |
177c0ea7 | 1182 | |
5f5c8ee5 GM |
1183 | if (row->enabled_p) |
1184 | { | |
4cecaab8 MB |
1185 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1186 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1187 | ||
1188 | while (glyph < end) | |
1189 | { | |
1190 | int c = glyph->u.ch; | |
1191 | int face_id = glyph->face_id; | |
daf01701 | 1192 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1193 | c -= SPACEGLYPH; |
1194 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1195 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1196 | ++glyph; | |
1197 | } | |
5f5c8ee5 | 1198 | |
4cecaab8 MB |
1199 | if (hash == 0) |
1200 | hash = 1; | |
5f5c8ee5 GM |
1201 | } |
1202 | ||
1203 | return hash; | |
1204 | } | |
1205 | ||
1206 | ||
153a073c | 1207 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1208 | the number of characters in the line. If must_write_spaces is |
1209 | zero, leading and trailing spaces are ignored. */ | |
1210 | ||
dfd153ae | 1211 | static int |
971de7fb | 1212 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1213 | { |
1214 | struct glyph_row *row = matrix->rows + vpos; | |
1215 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1216 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1217 | int len; | |
1218 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1219 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1220 | |
1221 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1222 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1223 | { |
1224 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1225 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1226 | --end; |
1227 | ||
177c0ea7 | 1228 | /* All blank line. */ |
5f5c8ee5 GM |
1229 | if (end == beg) |
1230 | return 0; | |
1231 | ||
1232 | /* Skip over leading spaces. */ | |
1233 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1234 | ++beg; | |
1235 | } | |
1236 | ||
1237 | /* If we don't have a glyph-table, each glyph is one character, | |
1238 | so return the number of glyphs. */ | |
1239 | if (glyph_table_base == 0) | |
1240 | len = end - beg; | |
1241 | else | |
1242 | { | |
1243 | /* Otherwise, scan the glyphs and accumulate their total length | |
1244 | in LEN. */ | |
1245 | len = 0; | |
1246 | while (beg < end) | |
1247 | { | |
3fc809e2 | 1248 | GLYPH g; |
177c0ea7 | 1249 | |
3fc809e2 KS |
1250 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1251 | ||
565b39a8 | 1252 | if (GLYPH_INVALID_P (g) |
42186983 | 1253 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1254 | len += 1; |
1255 | else | |
1256 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1257 | |
5f5c8ee5 GM |
1258 | ++beg; |
1259 | } | |
1260 | } | |
177c0ea7 | 1261 | |
5f5c8ee5 GM |
1262 | return len; |
1263 | } | |
1264 | ||
1265 | ||
1266 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1267 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1268 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1269 | |
55d4c1b2 | 1270 | static inline int |
6b1f9ba4 | 1271 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 GM |
1272 | { |
1273 | if (a == b) | |
1274 | return 1; | |
1275 | else if (a->hash != b->hash) | |
1276 | return 0; | |
1277 | else | |
1278 | { | |
1279 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1280 | int area; | |
1281 | ||
e4e0bee9 GM |
1282 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1283 | return 0; | |
1284 | ||
5f5c8ee5 GM |
1285 | /* Compare glyphs. */ |
1286 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1287 | { | |
1288 | if (a->used[area] != b->used[area]) | |
1289 | return 0; | |
177c0ea7 | 1290 | |
5f5c8ee5 GM |
1291 | a_glyph = a->glyphs[area]; |
1292 | a_end = a_glyph + a->used[area]; | |
1293 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1294 | |
5f5c8ee5 GM |
1295 | while (a_glyph < a_end |
1296 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1297 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1298 | |
5f5c8ee5 GM |
1299 | if (a_glyph != a_end) |
1300 | return 0; | |
1301 | } | |
1302 | ||
6b61353c KH |
1303 | if (a->fill_line_p != b->fill_line_p |
1304 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1305 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1306 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1307 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1308 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1309 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1310 | || a->right_fringe_offset != b->right_fringe_offset |
1311 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1312 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1313 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1314 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1315 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1316 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1317 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1318 | /* Different partially visible characters on left margin. */ |
1319 | || a->x != b->x | |
1320 | /* Different height. */ | |
1321 | || a->ascent != b->ascent | |
408f5064 GM |
1322 | || a->phys_ascent != b->phys_ascent |
1323 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1324 | || a->visible_height != b->visible_height) |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | return 1; | |
1329 | } | |
1330 | ||
1331 | ||
1332 | \f | |
1333 | /*********************************************************************** | |
1334 | Glyph Pool | |
1335 | ||
1336 | See dispextern.h for an overall explanation of glyph pools. | |
1337 | ***********************************************************************/ | |
1338 | ||
1339 | /* Allocate a glyph_pool structure. The structure returned is | |
1340 | initialized with zeros. The global variable glyph_pool_count is | |
1341 | incremented for each pool allocated. */ | |
1342 | ||
1343 | static struct glyph_pool * | |
971de7fb | 1344 | new_glyph_pool (void) |
5f5c8ee5 GM |
1345 | { |
1346 | struct glyph_pool *result; | |
1347 | ||
1348 | /* Allocate a new glyph_pool and clear it. */ | |
1349 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1350 | memset (result, 0, sizeof *result); |
177c0ea7 | 1351 | |
5f5c8ee5 GM |
1352 | /* For memory leak and double deletion checking. */ |
1353 | ++glyph_pool_count; | |
177c0ea7 | 1354 | |
5f5c8ee5 GM |
1355 | return result; |
1356 | } | |
1357 | ||
1358 | ||
1359 | /* Free a glyph_pool structure POOL. The function may be called with | |
1360 | a null POOL pointer. The global variable glyph_pool_count is | |
1361 | decremented with every pool structure freed. If this count gets | |
1362 | negative, more structures were freed than allocated, i.e. one | |
1363 | structure must have been freed more than once or a bogus pointer | |
1364 | was passed to free_glyph_pool. */ | |
1365 | ||
1366 | static void | |
971de7fb | 1367 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1368 | { |
1369 | if (pool) | |
1370 | { | |
153a073c | 1371 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1372 | --glyph_pool_count; |
1373 | xassert (glyph_pool_count >= 0); | |
1374 | ||
1375 | xfree (pool->glyphs); | |
1376 | xfree (pool); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | ||
1381 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1382 | columns we need. This function never shrinks a pool. The only | |
1383 | case in which this would make sense, would be when a frame's size | |
1384 | is changed from a large value to a smaller one. But, if someone | |
1385 | does it once, we can expect that he will do it again. | |
1386 | ||
1387 | Value is non-zero if the pool changed in a way which makes | |
1388 | re-adjusting window glyph matrices necessary. */ | |
1389 | ||
1390 | static int | |
971de7fb | 1391 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1392 | { |
ca9ce8f2 | 1393 | ptrdiff_t needed; |
5f5c8ee5 GM |
1394 | int changed_p; |
1395 | ||
1396 | changed_p = (pool->glyphs == 0 | |
1397 | || matrix_dim.height != pool->nrows | |
1398 | || matrix_dim.width != pool->ncolumns); | |
1399 | ||
1400 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1401 | needed = matrix_dim.width; |
0065d054 PE |
1402 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1403 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1404 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1405 | if (needed > pool->nglyphs) |
1406 | { | |
0065d054 PE |
1407 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1408 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1409 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1410 | memset (pool->glyphs + old_nglyphs, 0, | |
1411 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1412 | } |
1413 | ||
153a073c | 1414 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1415 | to do sanity checks, and (b) the number of columns determines |
1416 | where rows in the frame matrix start---this must be available to | |
1417 | determine pointers to rows of window sub-matrices. */ | |
1418 | pool->nrows = matrix_dim.height; | |
1419 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1420 | |
5f5c8ee5 GM |
1421 | return changed_p; |
1422 | } | |
1423 | ||
1424 | ||
1425 | \f | |
1426 | /*********************************************************************** | |
1427 | Debug Code | |
1428 | ***********************************************************************/ | |
1429 | ||
1430 | #if GLYPH_DEBUG | |
1431 | ||
a13396c9 | 1432 | |
28d440ab KL |
1433 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1434 | XXX Maybe this should be changed to flush the current terminal instead of | |
1435 | stdout. | |
1436 | */ | |
a13396c9 | 1437 | |
85fece3e PE |
1438 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1439 | ||
a13396c9 | 1440 | void |
59fc5cf9 | 1441 | flush_stdout (void) |
a13396c9 GM |
1442 | { |
1443 | fflush (stdout); | |
1444 | } | |
1445 | ||
1446 | ||
5f5c8ee5 GM |
1447 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1448 | pointer has been lost, e.g. by using a structure assignment between | |
1449 | rows, at least one pointer must occur more than once in the rows of | |
1450 | MATRIX. */ | |
1451 | ||
1452 | void | |
59fc5cf9 | 1453 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1454 | { |
1455 | int i, j; | |
177c0ea7 | 1456 | |
5f5c8ee5 GM |
1457 | for (i = 0; i < matrix->nrows; ++i) |
1458 | for (j = 0; j < matrix->nrows; ++j) | |
1459 | xassert (i == j | |
1460 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1461 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1462 | } | |
1463 | ||
1464 | ||
1465 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1466 | ||
1467 | struct glyph_row * | |
59fc5cf9 | 1468 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 GM |
1469 | { |
1470 | xassert (matrix && matrix->rows); | |
1471 | xassert (row >= 0 && row < matrix->nrows); | |
1472 | ||
1473 | /* That's really too slow for normal testing because this function | |
1474 | is called almost everywhere. Although---it's still astonishingly | |
1475 | fast, so it is valuable to have for debugging purposes. */ | |
1476 | #if 0 | |
1477 | check_matrix_pointer_lossage (matrix); | |
1478 | #endif | |
177c0ea7 | 1479 | |
5f5c8ee5 GM |
1480 | return matrix->rows + row; |
1481 | } | |
1482 | ||
1483 | ||
1484 | #if 0 /* This function makes invalid assumptions when text is | |
1485 | partially invisible. But it might come handy for debugging | |
1486 | nevertheless. */ | |
1487 | ||
1488 | /* Check invariants that must hold for an up to date current matrix of | |
1489 | window W. */ | |
1490 | ||
1491 | static void | |
59fc5cf9 | 1492 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1493 | { |
1494 | struct glyph_matrix *matrix = w->current_matrix; | |
1495 | int yb = window_text_bottom_y (w); | |
1496 | struct glyph_row *row = matrix->rows; | |
1497 | struct glyph_row *last_text_row = NULL; | |
1498 | struct buffer *saved = current_buffer; | |
1499 | struct buffer *buffer = XBUFFER (w->buffer); | |
1500 | int c; | |
177c0ea7 | 1501 | |
5f5c8ee5 GM |
1502 | /* This can sometimes happen for a fresh window. */ |
1503 | if (matrix->nrows < 2) | |
1504 | return; | |
1505 | ||
1506 | set_buffer_temp (buffer); | |
1507 | ||
1508 | /* Note: last row is always reserved for the mode line. */ | |
1509 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1510 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1511 | { | |
1512 | struct glyph_row *next = row + 1; | |
1513 | ||
1514 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1515 | last_text_row = row; | |
1516 | ||
1517 | /* Check that character and byte positions are in sync. */ | |
1518 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1519 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1520 | xassert (BYTEPOS (row->start.pos) |
1521 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1522 | |
1523 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1524 | have such a position temporarily in case of a minibuffer | |
1525 | displaying something like `[Sole completion]' at its end. */ | |
1526 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1527 | { |
1528 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1529 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1530 | xassert (BYTEPOS (row->end.pos) | |
1531 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1532 | } | |
5f5c8ee5 GM |
1533 | |
1534 | /* Check that end position of `row' is equal to start position | |
1535 | of next row. */ | |
1536 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1537 | { | |
1538 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1539 | == MATRIX_ROW_START_CHARPOS (next)); | |
1540 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1541 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1542 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1543 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1544 | } |
1545 | row = next; | |
1546 | } | |
1547 | ||
1548 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1549 | xassert (w->desired_matrix->rows != NULL); | |
1550 | set_buffer_temp (saved); | |
1551 | } | |
1552 | ||
1553 | #endif /* 0 */ | |
1554 | ||
1555 | #endif /* GLYPH_DEBUG != 0 */ | |
1556 | ||
1557 | ||
1558 | \f | |
1559 | /********************************************************************** | |
1560 | Allocating/ Adjusting Glyph Matrices | |
1561 | **********************************************************************/ | |
1562 | ||
1563 | /* Allocate glyph matrices over a window tree for a frame-based | |
1564 | redisplay | |
1565 | ||
1566 | X and Y are column/row within the frame glyph matrix where | |
1567 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1568 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1569 | function is only interested in the result matrix dimension, and | |
1570 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1571 | |
1572 | The function returns the total width/height of the sub-matrices of | |
1573 | the window tree. If called on a frame root window, the computation | |
1574 | will take the mini-buffer window into account. | |
1575 | ||
1576 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1577 | ||
1578 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1579 | glyph matrices yet, and | |
1580 | ||
1581 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1582 | any window in the tree will be changed or have been changed (see | |
153a073c | 1583 | DIM_ONLY_P) |
5f5c8ee5 GM |
1584 | |
1585 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1586 | function. | |
1587 | ||
1588 | Windows are arranged into chains of windows on the same level | |
1589 | through the next fields of window structures. Such a level can be | |
1590 | either a sequence of horizontally adjacent windows from left to | |
1591 | right, or a sequence of vertically adjacent windows from top to | |
1592 | bottom. Each window in a horizontal sequence can be either a leaf | |
1593 | window or a vertical sequence; a window in a vertical sequence can | |
1594 | be either a leaf or a horizontal sequence. All windows in a | |
1595 | horizontal sequence have the same height, and all windows in a | |
1596 | vertical sequence have the same width. | |
1597 | ||
1598 | This function uses, for historical reasons, a more general | |
1599 | algorithm to determine glyph matrix dimensions that would be | |
1600 | necessary. | |
1601 | ||
1602 | The matrix height of a horizontal sequence is determined by the | |
1603 | maximum height of any matrix in the sequence. The matrix width of | |
1604 | a horizontal sequence is computed by adding up matrix widths of | |
1605 | windows in the sequence. | |
1606 | ||
1607 | |<------- result width ------->| | |
1608 | +---------+----------+---------+ --- | |
1609 | | | | | | | |
1610 | | | | | | |
1611 | +---------+ | | result height | |
1612 | | +---------+ | |
1613 | | | | | |
1614 | +----------+ --- | |
1615 | ||
1616 | The matrix width of a vertical sequence is the maximum matrix width | |
1617 | of any window in the sequence. Its height is computed by adding up | |
1618 | matrix heights of windows in the sequence. | |
1619 | ||
1620 | |<---- result width -->| | |
1621 | +---------+ --- | |
1622 | | | | | |
1623 | | | | | |
1624 | +---------+--+ | | |
1625 | | | | | |
1626 | | | result height | |
1627 | | | | |
1628 | +------------+---------+ | | |
1629 | | | | | |
1630 | | | | | |
1631 | +------------+---------+ --- */ | |
1632 | ||
1633 | /* Bit indicating that a new matrix will be allocated or has been | |
1634 | allocated. */ | |
1635 | ||
1636 | #define NEW_LEAF_MATRIX (1 << 0) | |
1637 | ||
1638 | /* Bit indicating that a matrix will or has changed its location or | |
1639 | size. */ | |
1640 | ||
1641 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1642 | ||
1643 | static struct dim | |
6f704c76 DN |
1644 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1645 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1646 | { |
1647 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1648 | int x0 = x, y0 = y; | |
1649 | int wmax = 0, hmax = 0; | |
1650 | struct dim total; | |
1651 | struct dim dim; | |
1652 | struct window *w; | |
1653 | int in_horz_combination_p; | |
1654 | ||
1655 | /* What combination is WINDOW part of? Compute this once since the | |
1656 | result is the same for all windows in the `next' chain. The | |
1657 | special case of a root window (parent equal to nil) is treated | |
1658 | like a vertical combination because a root window's `next' | |
1659 | points to the mini-buffer window, if any, which is arranged | |
1660 | vertically below other windows. */ | |
1661 | in_horz_combination_p | |
1662 | = (!NILP (XWINDOW (window)->parent) | |
1663 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1664 | ||
1665 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1666 | do |
5f5c8ee5 GM |
1667 | { |
1668 | w = XWINDOW (window); | |
1669 | ||
1670 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1671 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1672 | if (!NILP (w->hchild)) |
177c0ea7 | 1673 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1674 | dim_only_p, |
1675 | window_change_flags); | |
1676 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1677 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1678 | dim_only_p, |
1679 | window_change_flags); | |
1680 | else | |
1681 | { | |
1682 | /* If not already done, allocate sub-matrix structures. */ | |
1683 | if (w->desired_matrix == NULL) | |
1684 | { | |
1685 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1686 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1687 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1688 | } | |
177c0ea7 | 1689 | |
5f5c8ee5 GM |
1690 | /* Width and height MUST be chosen so that there are no |
1691 | holes in the frame matrix. */ | |
5d3cc43c GM |
1692 | dim.width = required_matrix_width (w); |
1693 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1694 | |
1695 | /* Will matrix be re-allocated? */ | |
1696 | if (x != w->desired_matrix->matrix_x | |
1697 | || y != w->desired_matrix->matrix_y | |
1698 | || dim.width != w->desired_matrix->matrix_w | |
1699 | || dim.height != w->desired_matrix->matrix_h | |
1700 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1701 | w->left_margin_cols) |
5f5c8ee5 GM |
1702 | != w->desired_matrix->left_margin_glyphs) |
1703 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1704 | w->right_margin_cols) |
5f5c8ee5 GM |
1705 | != w->desired_matrix->right_margin_glyphs)) |
1706 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1707 | ||
1708 | /* Actually change matrices, if allowed. Do not consider | |
1709 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1710 | may have been changed which we don't now here. We trust | |
1711 | that we only will be called with DIM_ONLY_P != 0 when | |
1712 | necessary. */ | |
1713 | if (!dim_only_p) | |
1714 | { | |
1715 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1716 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | /* If we are part of a horizontal combination, advance x for | |
1721 | windows to the right of W; otherwise advance y for windows | |
1722 | below W. */ | |
1723 | if (in_horz_combination_p) | |
1724 | x += dim.width; | |
177c0ea7 | 1725 | else |
5f5c8ee5 GM |
1726 | y += dim.height; |
1727 | ||
1728 | /* Remember maximum glyph matrix dimensions. */ | |
1729 | wmax = max (wmax, dim.width); | |
1730 | hmax = max (hmax, dim.height); | |
1731 | ||
1732 | /* Next window on same level. */ | |
1733 | window = w->next; | |
1734 | } | |
1735 | while (!NILP (window)); | |
1736 | ||
1737 | /* Set `total' to the total glyph matrix dimension of this window | |
1738 | level. In a vertical combination, the width is the width of the | |
1739 | widest window; the height is the y we finally reached, corrected | |
1740 | by the y we started with. In a horizontal combination, the total | |
1741 | height is the height of the tallest window, and the width is the | |
1742 | x we finally reached, corrected by the x we started with. */ | |
1743 | if (in_horz_combination_p) | |
1744 | { | |
1745 | total.width = x - x0; | |
1746 | total.height = hmax; | |
1747 | } | |
177c0ea7 | 1748 | else |
5f5c8ee5 GM |
1749 | { |
1750 | total.width = wmax; | |
1751 | total.height = y - y0; | |
1752 | } | |
1753 | ||
1754 | return total; | |
1755 | } | |
1756 | ||
1757 | ||
5d3cc43c GM |
1758 | /* Return the required height of glyph matrices for window W. */ |
1759 | ||
2f7c71a1 | 1760 | static int |
971de7fb | 1761 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1762 | { |
1763 | #ifdef HAVE_WINDOW_SYSTEM | |
1764 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1765 | |
5d3cc43c GM |
1766 | if (FRAME_WINDOW_P (f)) |
1767 | { | |
1768 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1769 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1770 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1771 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1772 | /* One partially visible line at the top and |
1773 | bottom of the window. */ | |
1774 | + 2 | |
153a073c | 1775 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1776 | + 2); |
1777 | } | |
1778 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1779 | |
7df02016 | 1780 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1781 | } |
1782 | ||
1783 | ||
1784 | /* Return the required width of glyph matrices for window W. */ | |
1785 | ||
2f7c71a1 | 1786 | static int |
971de7fb | 1787 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1788 | { |
1789 | #ifdef HAVE_WINDOW_SYSTEM | |
1790 | struct frame *f = XFRAME (w->frame); | |
1791 | if (FRAME_WINDOW_P (f)) | |
1792 | { | |
1793 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1794 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1795 | |
5d3cc43c GM |
1796 | /* Compute number of glyphs needed in a glyph row. */ |
1797 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1798 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1799 | /* 2 partially visible columns in the text area. */ |
1800 | + 2 | |
1801 | /* One partially visible column at the right | |
1802 | edge of each marginal area. */ | |
1803 | + 1 + 1); | |
1804 | } | |
1805 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1806 | ||
7df02016 | 1807 | return XINT (w->total_cols); |
5d3cc43c GM |
1808 | } |
1809 | ||
1810 | ||
5f5c8ee5 | 1811 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1812 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1813 | |
5f5c8ee5 | 1814 | static void |
971de7fb | 1815 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1816 | { |
5f5c8ee5 GM |
1817 | while (w) |
1818 | { | |
1819 | if (!NILP (w->vchild)) | |
5d3cc43c | 1820 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1821 | else if (!NILP (w->hchild)) |
5d3cc43c | 1822 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1823 | else |
1824 | { | |
1825 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1826 | struct dim dim; |
1827 | ||
1828 | /* If matrices are not yet allocated, allocate them now. */ | |
1829 | if (w->desired_matrix == NULL) | |
1830 | { | |
1831 | w->desired_matrix = new_glyph_matrix (NULL); | |
1832 | w->current_matrix = new_glyph_matrix (NULL); | |
1833 | } | |
1834 | ||
5d3cc43c GM |
1835 | dim.width = required_matrix_width (w); |
1836 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1837 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1838 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1839 | } | |
177c0ea7 | 1840 | |
5f5c8ee5 GM |
1841 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1842 | } | |
1843 | } | |
1844 | ||
1845 | ||
1846 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1847 | do it for all frames; otherwise do it just for the given frame. | |
1848 | This function must be called when a new frame is created, its size | |
1849 | changes, or its window configuration changes. */ | |
1850 | ||
1851 | void | |
971de7fb | 1852 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1853 | { |
408f5064 GM |
1854 | /* Block input so that expose events and other events that access |
1855 | glyph matrices are not processed while we are changing them. */ | |
1856 | BLOCK_INPUT; | |
1857 | ||
5f5c8ee5 GM |
1858 | if (f) |
1859 | adjust_frame_glyphs (f); | |
1860 | else | |
1861 | { | |
1862 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1863 | |
5f5c8ee5 GM |
1864 | FOR_EACH_FRAME (tail, lisp_frame) |
1865 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1866 | } | |
408f5064 GM |
1867 | |
1868 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1869 | } |
1870 | ||
1871 | ||
1872 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1873 | |
1874 | To be called from init_display. | |
1875 | ||
5f5c8ee5 GM |
1876 | We need a glyph matrix because redraw will happen soon. |
1877 | Unfortunately, window sizes on selected_frame are not yet set to | |
1878 | meaningful values. I believe we can assume that there are only two | |
1879 | windows on the frame---the mini-buffer and the root window. Frame | |
1880 | height and width seem to be correct so far. So, set the sizes of | |
1881 | windows to estimated values. */ | |
1882 | ||
1883 | static void | |
971de7fb | 1884 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1885 | { |
91fb7e1b GM |
1886 | struct frame *sf = SELECTED_FRAME (); |
1887 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1888 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1889 | int frame_lines = FRAME_LINES (sf); |
1890 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1891 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1892 | |
1893 | /* Do it for the root window. */ | |
7df02016 | 1894 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1895 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1896 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1897 | |
1898 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1899 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1900 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1901 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 1902 | |
91fb7e1b | 1903 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1904 | glyphs_initialized_initially_p = 1; |
1905 | } | |
177c0ea7 | 1906 | |
5f5c8ee5 GM |
1907 | |
1908 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1909 | ||
1910 | static void | |
971de7fb | 1911 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1912 | { |
1913 | if (FRAME_WINDOW_P (f)) | |
1914 | adjust_frame_glyphs_for_window_redisplay (f); | |
1915 | else | |
1916 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1917 | |
5f5c8ee5 GM |
1918 | /* Don't forget the message buffer and the buffer for |
1919 | decode_mode_spec. */ | |
1920 | adjust_frame_message_buffer (f); | |
1921 | adjust_decode_mode_spec_buffer (f); | |
1922 | ||
1923 | f->glyphs_initialized_p = 1; | |
1924 | } | |
1925 | ||
075757cc CY |
1926 | /* Return 1 if any window in the tree has nonzero window margins. See |
1927 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1928 | static int | |
971de7fb | 1929 | showing_window_margins_p (struct window *w) |
075757cc CY |
1930 | { |
1931 | while (w) | |
1932 | { | |
1933 | if (!NILP (w->hchild)) | |
1934 | { | |
1935 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1936 | return 1; | |
1937 | } | |
1938 | else if (!NILP (w->vchild)) | |
1939 | { | |
1940 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1941 | return 1; | |
1942 | } | |
1943 | else if (!NILP (w->left_margin_cols) | |
1944 | || !NILP (w->right_margin_cols)) | |
1945 | return 1; | |
3fc809e2 | 1946 | |
075757cc CY |
1947 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1948 | } | |
1949 | return 0; | |
1950 | } | |
1951 | ||
5f5c8ee5 | 1952 | |
c9f00270 GM |
1953 | /* In the window tree with root W, build current matrices of leaf |
1954 | windows from the frame's current matrix. */ | |
1955 | ||
1956 | static void | |
971de7fb | 1957 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1958 | { |
1959 | struct window *w; | |
177c0ea7 | 1960 | |
c9f00270 GM |
1961 | for (; !NILP (window); window = w->next) |
1962 | { | |
1963 | w = XWINDOW (window); | |
177c0ea7 | 1964 | |
c9f00270 GM |
1965 | if (!NILP (w->hchild)) |
1966 | fake_current_matrices (w->hchild); | |
1967 | else if (!NILP (w->vchild)) | |
1968 | fake_current_matrices (w->vchild); | |
1969 | else | |
1970 | { | |
1971 | int i; | |
1972 | struct frame *f = XFRAME (w->frame); | |
1973 | struct glyph_matrix *m = w->current_matrix; | |
1974 | struct glyph_matrix *fm = f->current_matrix; | |
1975 | ||
7df02016 KS |
1976 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1977 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1978 | |
c9f00270 GM |
1979 | for (i = 0; i < m->matrix_h; ++i) |
1980 | { | |
1981 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1982 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
1983 | |
1984 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
1985 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
1986 | ||
1987 | r->enabled_p = fr->enabled_p; | |
1988 | if (r->enabled_p) | |
1989 | { | |
1990 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
1991 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
1992 | r->used[TEXT_AREA] = (m->matrix_w | |
1993 | - r->used[LEFT_MARGIN_AREA] | |
1994 | - r->used[RIGHT_MARGIN_AREA]); | |
1995 | r->mode_line_p = 0; | |
c9f00270 GM |
1996 | } |
1997 | } | |
1998 | } | |
1999 | } | |
2000 | } | |
2001 | ||
2002 | ||
bccee4f2 | 2003 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2004 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2005 | |
bccee4f2 | 2006 | static struct glyph_matrix * |
971de7fb | 2007 | save_current_matrix (struct frame *f) |
c9f00270 | 2008 | { |
bccee4f2 GM |
2009 | int i; |
2010 | struct glyph_matrix *saved; | |
e797dea6 | 2011 | |
bccee4f2 | 2012 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2013 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2014 | saved->nrows = f->current_matrix->nrows; |
2015 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2016 | * sizeof *saved->rows); | |
72af86bd | 2017 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2018 | |
2019 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2020 | { |
bccee4f2 GM |
2021 | struct glyph_row *from = f->current_matrix->rows + i; |
2022 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2023 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
bccee4f2 | 2024 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); |
72af86bd | 2025 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2026 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2027 | } |
bccee4f2 GM |
2028 | |
2029 | return saved; | |
2030 | } | |
2031 | ||
2032 | ||
2033 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2034 | and free memory associated with SAVED. */ | |
2035 | ||
2036 | static void | |
971de7fb | 2037 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2038 | { |
2039 | int i; | |
2040 | ||
2041 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2042 | { |
bccee4f2 GM |
2043 | struct glyph_row *from = saved->rows + i; |
2044 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2045 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2046 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2047 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2048 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2049 | } |
177c0ea7 | 2050 | |
bccee4f2 GM |
2051 | xfree (saved->rows); |
2052 | xfree (saved); | |
c9f00270 GM |
2053 | } |
2054 | ||
2055 | ||
bccee4f2 | 2056 | |
5f5c8ee5 GM |
2057 | /* Allocate/reallocate glyph matrices of a single frame F for |
2058 | frame-based redisplay. */ | |
2059 | ||
2060 | static void | |
971de7fb | 2061 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2062 | { |
5f5c8ee5 GM |
2063 | struct dim matrix_dim; |
2064 | int pool_changed_p; | |
2065 | int window_change_flags; | |
2066 | int top_window_y; | |
2067 | ||
2068 | if (!FRAME_LIVE_P (f)) | |
2069 | return; | |
2070 | ||
5f5c8ee5 GM |
2071 | top_window_y = FRAME_TOP_MARGIN (f); |
2072 | ||
2073 | /* Allocate glyph pool structures if not already done. */ | |
2074 | if (f->desired_pool == NULL) | |
2075 | { | |
2076 | f->desired_pool = new_glyph_pool (); | |
2077 | f->current_pool = new_glyph_pool (); | |
2078 | } | |
2079 | ||
2080 | /* Allocate frames matrix structures if needed. */ | |
2081 | if (f->desired_matrix == NULL) | |
2082 | { | |
2083 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2084 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2085 | } | |
177c0ea7 | 2086 | |
5f5c8ee5 GM |
2087 | /* Compute window glyph matrices. (This takes the mini-buffer |
2088 | window into account). The result is the size of the frame glyph | |
2089 | matrix needed. The variable window_change_flags is set to a bit | |
2090 | mask indicating whether new matrices will be allocated or | |
2091 | existing matrices change their size or location within the frame | |
2092 | matrix. */ | |
2093 | window_change_flags = 0; | |
2094 | matrix_dim | |
2095 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2096 | 0, top_window_y, | |
5d3cc43c | 2097 | 1, |
5f5c8ee5 GM |
2098 | &window_change_flags); |
2099 | ||
2100 | /* Add in menu bar lines, if any. */ | |
2101 | matrix_dim.height += top_window_y; | |
2102 | ||
2103 | /* Enlarge pools as necessary. */ | |
2104 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2105 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2106 | ||
177c0ea7 | 2107 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2108 | absolutely necessary since it requires a frame redraw. */ |
2109 | if (pool_changed_p || window_change_flags) | |
2110 | { | |
2111 | /* Do it for window matrices. */ | |
2112 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2113 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2114 | &window_change_flags); |
2115 | ||
2116 | /* Size of frame matrices must equal size of frame. Note | |
2117 | that we are called for X frames with window widths NOT equal | |
2118 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2119 | xassert (matrix_dim.width == FRAME_COLS (f) |
2120 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2121 | |
e797dea6 GM |
2122 | /* Pointers to glyph memory in glyph rows are exchanged during |
2123 | the update phase of redisplay, which means in general that a | |
2124 | frame's current matrix consists of pointers into both the | |
2125 | desired and current glyph pool of the frame. Adjusting a | |
2126 | matrix sets the frame matrix up so that pointers are all into | |
2127 | the same pool. If we want to preserve glyph contents of the | |
2128 | current matrix over a call to adjust_glyph_matrix, we must | |
2129 | make a copy of the current glyphs, and restore the current | |
2130 | matrix' contents from that copy. */ | |
2131 | if (display_completed | |
2132 | && !FRAME_GARBAGED_P (f) | |
2133 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2134 | && matrix_dim.height == f->current_matrix->matrix_h |
2135 | /* For some reason, the frame glyph matrix gets corrupted if | |
2136 | any of the windows contain margins. I haven't been able | |
2137 | to hunt down the reason, but for the moment this prevents | |
2138 | the problem from manifesting. -- cyd */ | |
2139 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2140 | { |
bccee4f2 GM |
2141 | struct glyph_matrix *copy = save_current_matrix (f); |
2142 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2143 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2144 | restore_current_matrix (f, copy); |
e797dea6 GM |
2145 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2146 | } | |
c9f00270 | 2147 | else |
e797dea6 | 2148 | { |
bccee4f2 | 2149 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2150 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2151 | SET_FRAME_GARBAGED (f); | |
2152 | } | |
5f5c8ee5 GM |
2153 | } |
2154 | } | |
2155 | ||
2156 | ||
2157 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2158 | window-based redisplay. */ | |
2159 | ||
2160 | static void | |
971de7fb | 2161 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2162 | { |
5f5c8ee5 | 2163 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2164 | |
5f5c8ee5 | 2165 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2166 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2167 | |
8ce2650d | 2168 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2169 | /* Allocate/ reallocate matrices of the dummy window used to display |
2170 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2171 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2172 | { |
2173 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2174 | struct window *w; |
5f5c8ee5 GM |
2175 | if (NILP (f->menu_bar_window)) |
2176 | { | |
2177 | f->menu_bar_window = make_window (); | |
2178 | w = XWINDOW (f->menu_bar_window); | |
2179 | XSETFRAME (w->frame, f); | |
2180 | w->pseudo_window_p = 1; | |
2181 | } | |
2182 | else | |
2183 | w = XWINDOW (f->menu_bar_window); | |
2184 | ||
2185 | /* Set window dimensions to frame dimensions and allocate or | |
2186 | adjust glyph matrices of W. */ | |
7df02016 KS |
2187 | XSETFASTINT (w->top_line, 0); |
2188 | XSETFASTINT (w->left_col, 0); | |
2189 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2190 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2191 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2192 | } |
57714a86 YM |
2193 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2194 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2195 | |
488dd4c4 | 2196 | #ifndef USE_GTK |
d2d37ddc PE |
2197 | { |
2198 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2199 | don't have a tool bar window yet, make one. */ | |
2200 | struct window *w; | |
2201 | if (NILP (f->tool_bar_window)) | |
2202 | { | |
2203 | f->tool_bar_window = make_window (); | |
2204 | w = XWINDOW (f->tool_bar_window); | |
2205 | XSETFRAME (w->frame, f); | |
2206 | w->pseudo_window_p = 1; | |
2207 | } | |
2208 | else | |
9ea173e8 | 2209 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2210 | |
d2d37ddc PE |
2211 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2212 | XSETFASTINT (w->left_col, 0); | |
2213 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2214 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2215 | allocate_matrices_for_window_redisplay (w); | |
2216 | } | |
488dd4c4 | 2217 | #endif |
5f5c8ee5 GM |
2218 | } |
2219 | ||
2220 | ||
177c0ea7 | 2221 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2222 | |
5f5c8ee5 GM |
2223 | Note that the message buffer is never freed. Since I could not |
2224 | find a free in 19.34, I assume that freeing it would be | |
2225 | problematic in some way and don't do it either. | |
2226 | ||
2227 | (Implementation note: It should be checked if we can free it | |
2228 | eventually without causing trouble). */ | |
2229 | ||
2230 | static void | |
971de7fb | 2231 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2232 | { |
dfd153ae | 2233 | ptrdiff_t size = FRAME_MESSAGE_BUF_SIZE (f) + 1; |
5f5c8ee5 GM |
2234 | |
2235 | if (FRAME_MESSAGE_BUF (f)) | |
2236 | { | |
2237 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2238 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2239 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2240 | } | |
2241 | else | |
2242 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2243 | } | |
2244 | ||
2245 | ||
2246 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2247 | ||
2248 | static void | |
971de7fb | 2249 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2250 | { |
2251 | f->decode_mode_spec_buffer | |
2252 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2253 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2254 | } | |
2255 | ||
2256 | ||
2257 | \f | |
2258 | /********************************************************************** | |
2259 | Freeing Glyph Matrices | |
2260 | **********************************************************************/ | |
2261 | ||
2262 | /* Free glyph memory for a frame F. F may be null. This function can | |
2263 | be called for the same frame more than once. The root window of | |
2264 | F may be nil when this function is called. This is the case when | |
2265 | the function is called when F is destroyed. */ | |
2266 | ||
2267 | void | |
971de7fb | 2268 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2269 | { |
2270 | if (f && f->glyphs_initialized_p) | |
2271 | { | |
42f55fe0 GM |
2272 | /* Block interrupt input so that we don't get surprised by an X |
2273 | event while we're in an inconsistent state. */ | |
2274 | BLOCK_INPUT; | |
5f5c8ee5 | 2275 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2276 | |
5f5c8ee5 GM |
2277 | /* Release window sub-matrices. */ |
2278 | if (!NILP (f->root_window)) | |
2279 | free_window_matrices (XWINDOW (f->root_window)); | |
2280 | ||
2281 | /* Free the dummy window for menu bars without X toolkit and its | |
2282 | glyph matrices. */ | |
2283 | if (!NILP (f->menu_bar_window)) | |
2284 | { | |
2285 | struct window *w = XWINDOW (f->menu_bar_window); | |
2286 | free_glyph_matrix (w->desired_matrix); | |
2287 | free_glyph_matrix (w->current_matrix); | |
2288 | w->desired_matrix = w->current_matrix = NULL; | |
2289 | f->menu_bar_window = Qnil; | |
2290 | } | |
2291 | ||
9ea173e8 GM |
2292 | /* Free the tool bar window and its glyph matrices. */ |
2293 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2294 | { |
9ea173e8 | 2295 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2296 | free_glyph_matrix (w->desired_matrix); |
2297 | free_glyph_matrix (w->current_matrix); | |
2298 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2299 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2300 | } |
2301 | ||
2302 | /* Release frame glyph matrices. Reset fields to zero in | |
2303 | case we are called a second time. */ | |
2304 | if (f->desired_matrix) | |
2305 | { | |
2306 | free_glyph_matrix (f->desired_matrix); | |
2307 | free_glyph_matrix (f->current_matrix); | |
2308 | f->desired_matrix = f->current_matrix = NULL; | |
2309 | } | |
2310 | ||
2311 | /* Release glyph pools. */ | |
2312 | if (f->desired_pool) | |
2313 | { | |
2314 | free_glyph_pool (f->desired_pool); | |
2315 | free_glyph_pool (f->current_pool); | |
2316 | f->desired_pool = f->current_pool = NULL; | |
2317 | } | |
177c0ea7 | 2318 | |
42f55fe0 | 2319 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2320 | } |
2321 | } | |
2322 | ||
2323 | ||
2324 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2325 | function may be called with a null pointer, and it may be called on | |
2326 | the same tree more than once. */ | |
2327 | ||
2328 | void | |
971de7fb | 2329 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2330 | { |
2331 | while (w) | |
2332 | { | |
2333 | if (!NILP (w->hchild)) | |
2334 | free_window_matrices (XWINDOW (w->hchild)); | |
2335 | else if (!NILP (w->vchild)) | |
2336 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2337 | else |
5f5c8ee5 GM |
2338 | { |
2339 | /* This is a leaf window. Free its memory and reset fields | |
2340 | to zero in case this function is called a second time for | |
2341 | W. */ | |
2342 | free_glyph_matrix (w->current_matrix); | |
2343 | free_glyph_matrix (w->desired_matrix); | |
2344 | w->current_matrix = w->desired_matrix = NULL; | |
2345 | } | |
2346 | ||
2347 | /* Next window on same level. */ | |
2348 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | ||
2353 | /* Check glyph memory leaks. This function is called from | |
2354 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2355 | exits. We therefore free all glyph memory for all active frames | |
2356 | explicitly and check that nothing is left allocated. */ | |
2357 | ||
2358 | void | |
971de7fb | 2359 | check_glyph_memory (void) |
5f5c8ee5 GM |
2360 | { |
2361 | Lisp_Object tail, frame; | |
2362 | ||
2363 | /* Free glyph memory for all frames. */ | |
2364 | FOR_EACH_FRAME (tail, frame) | |
2365 | free_glyphs (XFRAME (frame)); | |
2366 | ||
2367 | /* Check that nothing is left allocated. */ | |
2368 | if (glyph_matrix_count) | |
2369 | abort (); | |
2370 | if (glyph_pool_count) | |
2371 | abort (); | |
2372 | } | |
2373 | ||
2374 | ||
2375 | \f | |
2376 | /********************************************************************** | |
2377 | Building a Frame Matrix | |
2378 | **********************************************************************/ | |
2379 | ||
2380 | /* Most of the redisplay code works on glyph matrices attached to | |
2381 | windows. This is a good solution most of the time, but it is not | |
2382 | suitable for terminal code. Terminal output functions cannot rely | |
2383 | on being able to set an arbitrary terminal window. Instead they | |
2384 | must be provided with a view of the whole frame, i.e. the whole | |
2385 | screen. We build such a view by constructing a frame matrix from | |
2386 | window matrices in this section. | |
2387 | ||
2388 | Windows that must be updated have their must_be_update_p flag set. | |
2389 | For all such windows, their desired matrix is made part of the | |
2390 | desired frame matrix. For other windows, their current matrix is | |
2391 | made part of the desired frame matrix. | |
2392 | ||
2393 | +-----------------+----------------+ | |
2394 | | desired | desired | | |
2395 | | | | | |
2396 | +-----------------+----------------+ | |
2397 | | current | | |
2398 | | | | |
2399 | +----------------------------------+ | |
2400 | ||
2401 | Desired window matrices can be made part of the frame matrix in a | |
2402 | cheap way: We exploit the fact that the desired frame matrix and | |
2403 | desired window matrices share their glyph memory. This is not | |
2404 | possible for current window matrices. Their glyphs are copied to | |
2405 | the desired frame matrix. The latter is equivalent to | |
2406 | preserve_other_columns in the old redisplay. | |
2407 | ||
2408 | Used glyphs counters for frame matrix rows are the result of adding | |
2409 | up glyph lengths of the window matrices. A line in the frame | |
2410 | matrix is enabled, if a corresponding line in a window matrix is | |
2411 | enabled. | |
177c0ea7 | 2412 | |
5f5c8ee5 GM |
2413 | After building the desired frame matrix, it will be passed to |
2414 | terminal code, which will manipulate both the desired and current | |
2415 | frame matrix. Changes applied to the frame's current matrix have | |
2416 | to be visible in current window matrices afterwards, of course. | |
2417 | ||
2418 | This problem is solved like this: | |
2419 | ||
2420 | 1. Window and frame matrices share glyphs. Window matrices are | |
2421 | constructed in a way that their glyph contents ARE the glyph | |
2422 | contents needed in a frame matrix. Thus, any modification of | |
2423 | glyphs done in terminal code will be reflected in window matrices | |
2424 | automatically. | |
177c0ea7 | 2425 | |
5f5c8ee5 GM |
2426 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2427 | intercepted by hook functions so that corresponding row operations | |
2428 | on window matrices can be performed. This is necessary because we | |
2429 | use pointers to glyphs in glyph row structures. To satisfy the | |
2430 | assumption of point 1 above that glyphs are updated implicitly in | |
2431 | window matrices when they are manipulated via the frame matrix, | |
2432 | window and frame matrix must of course agree where to find the | |
2433 | glyphs for their rows. Possible manipulations that must be | |
2434 | mirrored are assignments of rows of the desired frame matrix to the | |
2435 | current frame matrix and scrolling the current frame matrix. */ | |
2436 | ||
2437 | /* Build frame F's desired matrix from window matrices. Only windows | |
2438 | which have the flag must_be_updated_p set have to be updated. Menu | |
2439 | bar lines of a frame are not covered by window matrices, so make | |
2440 | sure not to touch them in this function. */ | |
2441 | ||
2442 | static void | |
971de7fb | 2443 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2444 | { |
2445 | int i; | |
2446 | ||
2447 | /* F must have a frame matrix when this function is called. */ | |
2448 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2449 | |
5f5c8ee5 GM |
2450 | /* Clear all rows in the frame matrix covered by window matrices. |
2451 | Menu bar lines are not covered by windows. */ | |
2452 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2453 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2454 | ||
2455 | /* Build the matrix by walking the window tree. */ | |
2456 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2457 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2458 | } | |
2459 | ||
2460 | ||
2461 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2462 | matrices. W is the root of a window tree. */ | |
2463 | ||
2464 | static void | |
971de7fb | 2465 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2466 | { |
2467 | while (w) | |
2468 | { | |
2469 | if (!NILP (w->hchild)) | |
2470 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2471 | else if (!NILP (w->vchild)) | |
2472 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2473 | else | |
2474 | build_frame_matrix_from_leaf_window (matrix, w); | |
2475 | ||
2476 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | ||
2481 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2482 | desired frame matrix built. W is a leaf window whose desired or | |
2483 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2484 | must_be_updated_p determines which matrix it contributes to | |
2485 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2486 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2487 | Adding a desired matrix means setting up used counters and such in | |
2488 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2489 | means copying glyphs. The latter case corresponds to | |
2490 | preserve_other_columns in the old redisplay. */ | |
2491 | ||
2492 | static void | |
971de7fb | 2493 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2494 | { |
2495 | struct glyph_matrix *window_matrix; | |
2496 | int window_y, frame_y; | |
2497 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2498 | GLYPH right_border_glyph; |
2499 | ||
2500 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2501 | |
2502 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2503 | if (w->must_be_updated_p) | |
2504 | { | |
2505 | window_matrix = w->desired_matrix; | |
2506 | ||
2507 | /* Decide whether we want to add a vertical border glyph. */ | |
2508 | if (!WINDOW_RIGHTMOST_P (w)) | |
2509 | { | |
2510 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2511 | Lisp_Object gc; |
b4e49aee | 2512 | |
3fc809e2 KS |
2513 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2514 | if (dp | |
2515 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2516 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2517 | { | |
2518 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2519 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2520 | } | |
b4e49aee | 2521 | |
3fc809e2 KS |
2522 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2523 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2524 | } |
2525 | } | |
2526 | else | |
2527 | window_matrix = w->current_matrix; | |
2528 | ||
2529 | /* For all rows in the window matrix and corresponding rows in the | |
2530 | frame matrix. */ | |
2531 | window_y = 0; | |
2532 | frame_y = window_matrix->matrix_y; | |
2533 | while (window_y < window_matrix->nrows) | |
2534 | { | |
2535 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2536 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2537 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2538 | |
2539 | /* Fill up the frame row with spaces up to the left margin of the | |
2540 | window row. */ | |
2541 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2542 | ||
2543 | /* Fill up areas in the window matrix row with spaces. */ | |
2544 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2545 | |
2546 | /* If only part of W's desired matrix has been built, and | |
2547 | window_row wasn't displayed, use the corresponding current | |
2548 | row instead. */ | |
2549 | if (window_matrix == w->desired_matrix | |
2550 | && !window_row->enabled_p) | |
2551 | { | |
2552 | window_row = w->current_matrix->rows + window_y; | |
2553 | current_row_p = 1; | |
2554 | } | |
177c0ea7 | 2555 | |
2a8bd25f | 2556 | if (current_row_p) |
5f5c8ee5 | 2557 | { |
2a8bd25f | 2558 | /* Copy window row to frame row. */ |
72af86bd AS |
2559 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2560 | window_row->glyphs[0], | |
2561 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2562 | } |
2563 | else | |
2564 | { | |
2a8bd25f | 2565 | xassert (window_row->enabled_p); |
177c0ea7 | 2566 | |
2a8bd25f GM |
2567 | /* Only when a desired row has been displayed, we want |
2568 | the corresponding frame row to be updated. */ | |
2569 | frame_row->enabled_p = 1; | |
177c0ea7 | 2570 | |
5f5c8ee5 GM |
2571 | /* Maybe insert a vertical border between horizontally adjacent |
2572 | windows. */ | |
3fc809e2 | 2573 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2574 | { |
2575 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2576 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2577 | } | |
2578 | ||
498c08ea | 2579 | #if GLYPH_DEBUG |
a13396c9 GM |
2580 | /* Window row window_y must be a slice of frame row |
2581 | frame_y. */ | |
5f5c8ee5 | 2582 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2583 | |
5f5c8ee5 GM |
2584 | /* If rows are in sync, we don't have to copy glyphs because |
2585 | frame and window share glyphs. */ | |
177c0ea7 | 2586 | |
a38634ff | 2587 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2588 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2589 | #endif |
5f5c8ee5 GM |
2590 | } |
2591 | ||
2592 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2593 | up with spaces, and visit leaf windows from left to right it | |
2594 | can be done simply. */ | |
177c0ea7 | 2595 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2596 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2597 | ||
5f5c8ee5 GM |
2598 | /* Next row. */ |
2599 | ++window_y; | |
2600 | ++frame_y; | |
2601 | } | |
2602 | } | |
2603 | ||
5f81871e RS |
2604 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2605 | ID, return a glyph that has a realized face ID. | |
2606 | This is used for glyphs displayed specially and not part of the text; | |
2607 | for instance, vertical separators, truncation markers, etc. */ | |
2608 | ||
3fc809e2 | 2609 | void |
971de7fb | 2610 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2611 | { |
3fc809e2 | 2612 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2613 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2614 | if (lface_id > 0) | |
2615 | { | |
2616 | int face_id = merge_faces (XFRAME (w->frame), | |
2617 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2618 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2619 | } |
5f81871e | 2620 | } |
5f5c8ee5 GM |
2621 | |
2622 | /* Add spaces to a glyph row ROW in a window matrix. | |
2623 | ||
2624 | Each row has the form: | |
2625 | ||
2626 | +---------+-----------------------------+------------+ | |
2627 | | left | text | right | | |
2628 | +---------+-----------------------------+------------+ | |
2629 | ||
2630 | Left and right marginal areas are optional. This function adds | |
2631 | spaces to areas so that there are no empty holes between areas. | |
2632 | In other words: If the right area is not empty, the text area | |
2633 | is filled up with spaces up to the right area. If the text area | |
2634 | is not empty, the left area is filled up. | |
2635 | ||
2636 | To be called for frame-based redisplay, only. */ | |
2637 | ||
2638 | static void | |
971de7fb | 2639 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2640 | { |
2641 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2642 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2643 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2644 | } | |
2645 | ||
2646 | ||
2647 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2648 | frame-based redisplay only. */ | |
2649 | ||
2650 | static void | |
971de7fb | 2651 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2652 | { |
2653 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2654 | { | |
2655 | struct glyph *end = row->glyphs[area + 1]; | |
2656 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2657 | ||
2658 | while (text < end) | |
2659 | *text++ = space_glyph; | |
2660 | row->used[area] = text - row->glyphs[area]; | |
2661 | } | |
2662 | } | |
2663 | ||
2664 | ||
2665 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2666 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2667 | ||
2668 | static void | |
971de7fb | 2669 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2670 | { |
2671 | int i = row->used[TEXT_AREA]; | |
2672 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2673 | |
5f5c8ee5 GM |
2674 | while (i < upto) |
2675 | glyph[i++] = space_glyph; | |
2676 | ||
2677 | row->used[TEXT_AREA] = i; | |
2678 | } | |
2679 | ||
2680 | ||
2681 | \f | |
2682 | /********************************************************************** | |
2683 | Mirroring operations on frame matrices in window matrices | |
2684 | **********************************************************************/ | |
2685 | ||
2686 | /* Set frame being updated via frame-based redisplay to F. This | |
2687 | function must be called before updates to make explicit that we are | |
2688 | working on frame matrices or not. */ | |
2689 | ||
55d4c1b2 | 2690 | static inline void |
971de7fb | 2691 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2692 | { |
2693 | frame_matrix_frame = f; | |
2694 | } | |
2695 | ||
2696 | ||
2697 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2698 | DESIRED_MATRIX is the desired matrix corresponding to | |
2699 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2700 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2701 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2702 | done in frame matrices, and that we have to perform analogous | |
2703 | operations in window matrices of frame_matrix_frame. */ | |
2704 | ||
55d4c1b2 | 2705 | static inline void |
971de7fb | 2706 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2707 | { |
2708 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2709 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2710 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2711 | |
2712 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2713 | between both rows, and does a structure assignment otherwise. */ | |
2714 | assign_row (current_row, desired_row); | |
2715 | ||
2716 | /* Enable current_row to mark it as valid. */ | |
2717 | current_row->enabled_p = 1; | |
e876ff42 | 2718 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2719 | |
2720 | /* If we are called on frame matrices, perform analogous operations | |
2721 | for window matrices. */ | |
2722 | if (frame_matrix_frame) | |
2723 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2724 | } | |
2725 | ||
2726 | ||
2727 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2728 | W's frame which has been made current (by swapping pointers between | |
2729 | current and desired matrix). Perform analogous operations in the | |
2730 | matrices of leaf windows in the window tree rooted at W. */ | |
2731 | ||
2732 | static void | |
971de7fb | 2733 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2734 | { |
2735 | while (w) | |
2736 | { | |
2737 | if (!NILP (w->hchild)) | |
2738 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2739 | else if (!NILP (w->vchild)) | |
2740 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2741 | else | |
2742 | { | |
2743 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2744 | here because the checks performed in debug mode there | |
2745 | will not allow the conversion. */ | |
2746 | int row = frame_row - w->desired_matrix->matrix_y; | |
2747 | ||
2748 | /* If FRAME_ROW is within W, assign the desired row to the | |
2749 | current row (exchanging glyph pointers). */ | |
2750 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2751 | { | |
2752 | struct glyph_row *current_row | |
2753 | = MATRIX_ROW (w->current_matrix, row); | |
2754 | struct glyph_row *desired_row | |
2755 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2756 | |
2757 | if (desired_row->enabled_p) | |
2758 | assign_row (current_row, desired_row); | |
2759 | else | |
2760 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2761 | current_row->enabled_p = 1; |
d009ae66 EZ |
2762 | |
2763 | /* Set the Y coordinate of the mode/header line's row. | |
2764 | It is needed in draw_row_with_mouse_face to find the | |
2765 | screen coordinates. (Window-based redisplay sets | |
2766 | this in update_window, but no one seems to do that | |
2767 | for frame-based redisplay.) */ | |
2768 | if (current_row->mode_line_p) | |
2769 | current_row->y = row; | |
5f5c8ee5 GM |
2770 | } |
2771 | } | |
177c0ea7 | 2772 | |
5f5c8ee5 GM |
2773 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2774 | } | |
2775 | } | |
2776 | ||
2777 | ||
2778 | /* Perform row dance after scrolling. We are working on the range of | |
2779 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2780 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2781 | row I in the range 0 <= I < NLINES, the index of the original line | |
2782 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2783 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2784 | row 0 <= I < NLINES which is empty. | |
2785 | ||
2786 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2787 | |
5f5c8ee5 | 2788 | void |
6f704c76 DN |
2789 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2790 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2791 | { |
2792 | /* A copy of original rows. */ | |
2793 | struct glyph_row *old_rows; | |
2794 | ||
2795 | /* Rows to assign to. */ | |
2796 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2797 | |
5f5c8ee5 GM |
2798 | int i; |
2799 | ||
2800 | /* Make a copy of the original rows. */ | |
2801 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2802 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2803 | |
2804 | /* Assign new rows, maybe clear lines. */ | |
2805 | for (i = 0; i < nlines; ++i) | |
2806 | { | |
2807 | int enabled_before_p = new_rows[i].enabled_p; | |
2808 | ||
2809 | xassert (i + unchanged_at_top < matrix->nrows); | |
2810 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2811 | new_rows[i] = old_rows[copy_from[i]]; | |
2812 | new_rows[i].enabled_p = enabled_before_p; | |
2813 | ||
2814 | /* RETAINED_P is zero for empty lines. */ | |
2815 | if (!retained_p[copy_from[i]]) | |
2816 | new_rows[i].enabled_p = 0; | |
2817 | } | |
2818 | ||
153a073c | 2819 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2820 | if (frame_matrix_frame) |
2821 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2822 | unchanged_at_top, nlines, copy_from, retained_p); | |
2823 | } | |
2824 | ||
2825 | ||
a13396c9 | 2826 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2827 | the current frame matrix. */ |
a13396c9 GM |
2828 | |
2829 | static void | |
971de7fb | 2830 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2831 | { |
2832 | struct frame *f = XFRAME (w->frame); | |
2833 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2834 | int left, right, x, width; |
a13396c9 | 2835 | |
5cb88111 | 2836 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2837 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2838 | xassert (!FRAME_WINDOW_P (f)); |
2839 | ||
7df02016 KS |
2840 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2841 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2842 | x = w->current_matrix->matrix_x; |
2843 | width = w->current_matrix->matrix_w; | |
2844 | ||
a13396c9 GM |
2845 | window_row = w->current_matrix->rows; |
2846 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2847 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2848 | |
5cb88111 | 2849 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2850 | { |
5cb88111 GM |
2851 | window_row->glyphs[LEFT_MARGIN_AREA] |
2852 | = frame_row->glyphs[0] + x; | |
2853 | window_row->glyphs[TEXT_AREA] | |
2854 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2855 | window_row->glyphs[LAST_AREA] | |
2856 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2857 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2858 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2859 | } |
2860 | } | |
2861 | ||
2862 | ||
2863 | /* Return the window in the window tree rooted in W containing frame | |
2864 | row ROW. Value is null if none is found. */ | |
2865 | ||
09ad5a91 | 2866 | static struct window * |
971de7fb | 2867 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2868 | { |
2869 | struct window *found = NULL; | |
177c0ea7 | 2870 | |
a13396c9 GM |
2871 | while (w && !found) |
2872 | { | |
2873 | if (!NILP (w->hchild)) | |
2874 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2875 | else if (!NILP (w->vchild)) | |
2876 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2877 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2878 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2879 | found = w; |
177c0ea7 | 2880 | |
a13396c9 GM |
2881 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2882 | } | |
2883 | ||
2884 | return found; | |
2885 | } | |
2886 | ||
2887 | ||
5f5c8ee5 GM |
2888 | /* Perform a line dance in the window tree rooted at W, after |
2889 | scrolling a frame matrix in mirrored_line_dance. | |
2890 | ||
2891 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2892 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2893 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2894 | I < NLINES, the index of the original line to move to I. This | |
2895 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2896 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2897 | which is empty. */ | |
2898 | ||
2899 | static void | |
971de7fb | 2900 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2901 | { |
2902 | while (w) | |
2903 | { | |
2904 | if (!NILP (w->hchild)) | |
2905 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2906 | nlines, copy_from, retained_p); | |
2907 | else if (!NILP (w->vchild)) | |
2908 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2909 | nlines, copy_from, retained_p); | |
2910 | else | |
2911 | { | |
2912 | /* W is a leaf window, and we are working on its current | |
2913 | matrix m. */ | |
2914 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2915 | int i, sync_p = 0; |
5f5c8ee5 GM |
2916 | struct glyph_row *old_rows; |
2917 | ||
2918 | /* Make a copy of the original rows of matrix m. */ | |
2919 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2920 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2921 | |
2922 | for (i = 0; i < nlines; ++i) | |
2923 | { | |
2924 | /* Frame relative line assigned to. */ | |
2925 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2926 | |
5f5c8ee5 GM |
2927 | /* Frame relative line assigned. */ |
2928 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2929 | |
5f5c8ee5 GM |
2930 | /* Window relative line assigned to. */ |
2931 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2932 | |
5f5c8ee5 GM |
2933 | /* Window relative line assigned. */ |
2934 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2935 | |
5f5c8ee5 GM |
2936 | /* Is assigned line inside window? */ |
2937 | int from_inside_window_p | |
2938 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2939 | |
a13396c9 GM |
2940 | /* Is assigned to line inside window? */ |
2941 | int to_inside_window_p | |
2942 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2943 | |
a13396c9 | 2944 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2945 | { |
5f5c8ee5 GM |
2946 | /* Enabled setting before assignment. */ |
2947 | int enabled_before_p; | |
177c0ea7 | 2948 | |
5f5c8ee5 GM |
2949 | /* Do the assignment. The enabled_p flag is saved |
2950 | over the assignment because the old redisplay did | |
2951 | that. */ | |
2952 | enabled_before_p = m->rows[window_to].enabled_p; | |
2953 | m->rows[window_to] = old_rows[window_from]; | |
2954 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2955 | |
5f5c8ee5 GM |
2956 | /* If frame line is empty, window line is empty, too. */ |
2957 | if (!retained_p[copy_from[i]]) | |
2958 | m->rows[window_to].enabled_p = 0; | |
2959 | } | |
a13396c9 GM |
2960 | else if (to_inside_window_p) |
2961 | { | |
2962 | /* A copy between windows. This is an infrequent | |
2963 | case not worth optimizing. */ | |
2964 | struct frame *f = XFRAME (w->frame); | |
2965 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
2966 | struct window *w2; | |
2967 | struct glyph_matrix *m2; | |
2968 | int m2_from; | |
2969 | ||
fe8b8401 | 2970 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2971 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2972 | -nw', FROM_FRAME sometimes has no associated window. | |
2973 | This check avoids a segfault if W2 is null. */ | |
2974 | if (w2) | |
2975 | { | |
2976 | m2 = w2->current_matrix; | |
2977 | m2_from = frame_from - m2->matrix_y; | |
2978 | copy_row_except_pointers (m->rows + window_to, | |
2979 | m2->rows + m2_from); | |
2980 | ||
2981 | /* If frame line is empty, window line is empty, too. */ | |
2982 | if (!retained_p[copy_from[i]]) | |
2983 | m->rows[window_to].enabled_p = 0; | |
2984 | } | |
a13396c9 GM |
2985 | sync_p = 1; |
2986 | } | |
2987 | else if (from_inside_window_p) | |
2988 | sync_p = 1; | |
5f5c8ee5 | 2989 | } |
a13396c9 GM |
2990 | |
2991 | /* If there was a copy between windows, make sure glyph | |
2992 | pointers are in sync with the frame matrix. */ | |
2993 | if (sync_p) | |
2994 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2995 | |
5f5c8ee5 GM |
2996 | /* Check that no pointers are lost. */ |
2997 | CHECK_MATRIX (m); | |
2998 | } | |
2999 | ||
3000 | /* Next window on same level. */ | |
3001 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3002 | } | |
3003 | } | |
3004 | ||
3005 | ||
3006 | #if GLYPH_DEBUG | |
3007 | ||
3008 | /* Check that window and frame matrices agree about their | |
3009 | understanding where glyphs of the rows are to find. For each | |
3010 | window in the window tree rooted at W, check that rows in the | |
3011 | matrices of leaf window agree with their frame matrices about | |
3012 | glyph pointers. */ | |
3013 | ||
85fece3e | 3014 | static void |
59fc5cf9 | 3015 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3016 | { |
3017 | while (w) | |
3018 | { | |
3019 | if (!NILP (w->hchild)) | |
3020 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3021 | else if (!NILP (w->vchild)) | |
3022 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3023 | else | |
60a8948a | 3024 | { |
5f5c8ee5 GM |
3025 | struct frame *f = XFRAME (w->frame); |
3026 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3027 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3028 | } |
177c0ea7 | 3029 | |
5f5c8ee5 GM |
3030 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3031 | } | |
3032 | } | |
3033 | ||
3034 | ||
3035 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3036 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3037 | each row in WINDOW_MATRIX check that it's a slice of the | |
3038 | corresponding frame row. If it isn't, abort. */ | |
3039 | ||
3040 | static void | |
59fc5cf9 AS |
3041 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3042 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3043 | { |
3044 | /* Row number in WINDOW_MATRIX. */ | |
3045 | int i = 0; | |
3046 | ||
3047 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3048 | int j = window_matrix->matrix_y; | |
3049 | ||
177c0ea7 | 3050 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3051 | slice of the row in the frame matrix. If it isn't we didn't |
3052 | mirror an operation on the frame matrix correctly. */ | |
3053 | while (i < window_matrix->nrows) | |
3054 | { | |
3055 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3056 | frame_matrix->rows + j)) | |
3057 | abort (); | |
3058 | ++i, ++j; | |
3059 | } | |
3060 | } | |
3061 | ||
3062 | #endif /* GLYPH_DEBUG != 0 */ | |
3063 | ||
3064 | ||
3065 | \f | |
3066 | /********************************************************************** | |
3067 | VPOS and HPOS translations | |
3068 | **********************************************************************/ | |
3069 | ||
3070 | #if GLYPH_DEBUG | |
3071 | ||
3072 | /* Translate vertical position VPOS which is relative to window W to a | |
3073 | vertical position relative to W's frame. */ | |
3074 | ||
3075 | static int | |
59fc5cf9 | 3076 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3077 | { |
85fece3e | 3078 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
5f5c8ee5 | 3079 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3080 | vpos += WINDOW_TOP_EDGE_LINE (w); |
85fece3e | 3081 | xassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3082 | return vpos; |
3083 | } | |
3084 | ||
3085 | ||
3086 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3087 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3088 | |
3089 | static int | |
59fc5cf9 | 3090 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3091 | { |
82f4a138 | 3092 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3093 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3094 | return hpos; |
3095 | } | |
177c0ea7 | 3096 | |
5f5c8ee5 GM |
3097 | #endif /* GLYPH_DEBUG */ |
3098 | ||
3099 | ||
3100 | \f | |
3101 | /********************************************************************** | |
3102 | Redrawing Frames | |
3103 | **********************************************************************/ | |
3104 | ||
a7ca3326 | 3105 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3106 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3107 | (Lisp_Object frame) |
5f5c8ee5 GM |
3108 | { |
3109 | struct frame *f; | |
3110 | ||
b7826503 | 3111 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3112 | f = XFRAME (frame); |
3113 | ||
3114 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3115 | (Implementation note: It still has to be checked why we are | |
3116 | called so early here). */ | |
3117 | if (!glyphs_initialized_initially_p) | |
3118 | return Qnil; | |
3119 | ||
3120 | update_begin (f); | |
3224dac1 | 3121 | #ifdef MSDOS |
f2adda5e | 3122 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3123 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3124 | #endif |
385ed61f | 3125 | clear_frame (f); |
5f5c8ee5 GM |
3126 | clear_current_matrices (f); |
3127 | update_end (f); | |
daf01701 | 3128 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3129 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3130 | windows_or_buffers_changed++; |
3131 | /* Mark all windows as inaccurate, so that every window will have | |
3132 | its redisplay done. */ | |
3133 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3134 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3135 | f->garbaged = 0; | |
3136 | return Qnil; | |
3137 | } | |
3138 | ||
3139 | ||
3140 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3141 | function redraw-frame. */ | |
3142 | ||
3143 | void | |
971de7fb | 3144 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3145 | { |
3146 | Lisp_Object frame; | |
3147 | XSETFRAME (frame, f); | |
3148 | Fredraw_frame (frame); | |
3149 | } | |
3150 | ||
3151 | ||
3152 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3153 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3154 | (void) |
5f5c8ee5 GM |
3155 | { |
3156 | Lisp_Object tail, frame; | |
3157 | ||
3158 | FOR_EACH_FRAME (tail, frame) | |
3159 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3160 | Fredraw_frame (frame); | |
3161 | ||
3162 | return Qnil; | |
3163 | } | |
3164 | ||
3165 | ||
5f5c8ee5 | 3166 | \f |
5f5c8ee5 GM |
3167 | /*********************************************************************** |
3168 | Frame Update | |
3169 | ***********************************************************************/ | |
4588ec20 | 3170 | |
5f5c8ee5 | 3171 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3172 | |
5f5c8ee5 GM |
3173 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3174 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3175 | scrolling. | |
177c0ea7 | 3176 | |
5f5c8ee5 | 3177 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3178 | |
5f5c8ee5 | 3179 | int |
971de7fb | 3180 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3181 | { |
3182 | /* 1 means display has been paused because of pending input. */ | |
3183 | int paused_p; | |
3184 | struct window *root_window = XWINDOW (f->root_window); | |
3185 | ||
a2130dbb KS |
3186 | if (redisplay_dont_pause) |
3187 | force_p = 1; | |
d012c62b | 3188 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3189 | else if (NILP (Vredisplay_preemption_period)) |
3190 | force_p = 1; | |
3191 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3192 | { |
3193 | EMACS_TIME tm; | |
3194 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3195 | int sec, usec; | |
3196 | ||
993d4ab6 KS |
3197 | if (detect_input_pending_ignore_squeezables ()) |
3198 | { | |
3199 | paused_p = 1; | |
3200 | goto do_pause; | |
3201 | } | |
3202 | ||
d012c62b KS |
3203 | sec = (int) p; |
3204 | usec = (p - sec) * 1000000; | |
3205 | ||
3206 | EMACS_GET_TIME (tm); | |
3207 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3208 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3209 | } | |
3210 | #endif | |
3211 | ||
5f5c8ee5 | 3212 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3213 | { |
5f5c8ee5 GM |
3214 | /* We are working on window matrix basis. All windows whose |
3215 | flag must_be_updated_p is set have to be updated. */ | |
3216 | ||
3217 | /* Record that we are not working on frame matrices. */ | |
3218 | set_frame_matrix_frame (NULL); | |
3219 | ||
3220 | /* Update all windows in the window tree of F, maybe stopping | |
3221 | when pending input is detected. */ | |
3222 | update_begin (f); | |
3223 | ||
3224 | /* Update the menu bar on X frames that don't have toolkit | |
3225 | support. */ | |
3226 | if (WINDOWP (f->menu_bar_window)) | |
3227 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3228 | ||
3229 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3230 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3231 | { |
9ea173e8 | 3232 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3233 | |
3234 | /* Update tool-bar window. */ | |
3235 | if (w->must_be_updated_p) | |
4588ec20 | 3236 | { |
153a073c PJ |
3237 | Lisp_Object tem; |
3238 | ||
5f5c8ee5 GM |
3239 | update_window (w, 1); |
3240 | w->must_be_updated_p = 0; | |
3241 | ||
3242 | /* Swap tool-bar strings. We swap because we want to | |
3243 | reuse strings. */ | |
9ea173e8 GM |
3244 | tem = f->current_tool_bar_string; |
3245 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3246 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3247 | } |
3248 | } | |
177c0ea7 | 3249 | |
5f5c8ee5 GM |
3250 | |
3251 | /* Update windows. */ | |
3252 | paused_p = update_window_tree (root_window, force_p); | |
3253 | update_end (f); | |
177c0ea7 | 3254 | |
6b61353c | 3255 | /* This flush is a performance bottleneck under X, |
e581a466 | 3256 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3257 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3258 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3259 | if (f->force_flush_display_p) |
e581a466 KL |
3260 | { |
3261 | FRAME_RIF (f)->flush_display (f); | |
3262 | f->force_flush_display_p = 0; | |
3263 | } | |
4588ec20 | 3264 | } |
5f5c8ee5 GM |
3265 | else |
3266 | { | |
3267 | /* We are working on frame matrix basis. Set the frame on whose | |
3268 | frame matrix we operate. */ | |
3269 | set_frame_matrix_frame (f); | |
3270 | ||
868dd24b | 3271 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3272 | build_frame_matrix (f); |
177c0ea7 | 3273 | |
868dd24b GM |
3274 | /* Update the display */ |
3275 | update_begin (f); | |
5f5c8ee5 | 3276 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3277 | update_end (f); |
3278 | ||
7d2f1216 | 3279 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3280 | { |
0b0d3e0b KL |
3281 | if (FRAME_TTY (f)->termscript) |
3282 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3283 | if (FRAME_TERMCAP_P (f)) |
3284 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3285 | } |
868dd24b | 3286 | |
5f5c8ee5 | 3287 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3288 | #if GLYPH_DEBUG |
9b0e97aa GM |
3289 | check_window_matrix_pointers (root_window); |
3290 | add_frame_display_history (f, paused_p); | |
3291 | #endif | |
5f5c8ee5 GM |
3292 | } |
3293 | ||
ef1b0ba7 | 3294 | #if PERIODIC_PREEMPTION_CHECKING |
993d4ab6 | 3295 | do_pause: |
ef1b0ba7 | 3296 | #endif |
5f5c8ee5 GM |
3297 | /* Reset flags indicating that a window should be updated. */ |
3298 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3299 | |
868dd24b | 3300 | display_completed = !paused_p; |
5f5c8ee5 | 3301 | return paused_p; |
4588ec20 | 3302 | } |
5f5c8ee5 GM |
3303 | |
3304 | ||
4588ec20 | 3305 | \f |
5f5c8ee5 GM |
3306 | /************************************************************************ |
3307 | Window-based updates | |
3308 | ************************************************************************/ | |
3309 | ||
3310 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3311 | don't stop updating when input is pending. */ | |
3312 | ||
3313 | static int | |
971de7fb | 3314 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3315 | { |
3316 | int paused_p = 0; | |
177c0ea7 | 3317 | |
5f5c8ee5 GM |
3318 | while (w && !paused_p) |
3319 | { | |
3320 | if (!NILP (w->hchild)) | |
3321 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3322 | else if (!NILP (w->vchild)) | |
3323 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3324 | else if (w->must_be_updated_p) | |
3325 | paused_p |= update_window (w, force_p); | |
3326 | ||
3327 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3328 | } | |
3329 | ||
3330 | return paused_p; | |
3331 | } | |
3332 | ||
3333 | ||
3334 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3335 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3336 | ||
3337 | void | |
971de7fb | 3338 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3339 | { |
3340 | if (w->must_be_updated_p) | |
3341 | { | |
3342 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3343 | ||
3344 | /* Record that this is not a frame-based redisplay. */ | |
3345 | set_frame_matrix_frame (NULL); | |
3346 | ||
a2130dbb KS |
3347 | if (redisplay_dont_pause) |
3348 | force_p = 1; | |
d012c62b | 3349 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3350 | else if (NILP (Vredisplay_preemption_period)) |
3351 | force_p = 1; | |
3352 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3353 | { |
3354 | EMACS_TIME tm; | |
3355 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3356 | int sec, usec; | |
3357 | ||
3358 | sec = (int) p; | |
3359 | usec = (p - sec) * 1000000; | |
3360 | ||
3361 | EMACS_GET_TIME (tm); | |
3362 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3363 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3364 | } | |
3365 | #endif | |
3366 | ||
5f5c8ee5 GM |
3367 | /* Update W. */ |
3368 | update_begin (f); | |
3369 | update_window (w, force_p); | |
3370 | update_end (f); | |
4588ec20 | 3371 | |
5f5c8ee5 GM |
3372 | /* Reset flag in W. */ |
3373 | w->must_be_updated_p = 0; | |
3374 | } | |
3375 | } | |
4588ec20 | 3376 | |
93e023fc | 3377 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3378 | |
408f5064 GM |
3379 | /* Redraw lines from the current matrix of window W that are |
3380 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3381 | ||
3382 | static void | |
971de7fb | 3383 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3384 | { |
d8ee7803 | 3385 | int i; |
fa971ac3 | 3386 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3387 | |
408f5064 GM |
3388 | /* If rows overlapping others have been changed, the rows being |
3389 | overlapped have to be redrawn. This won't draw lines that have | |
3390 | already been drawn in update_window_line because overlapped_p in | |
3391 | desired rows is 0, so after row assignment overlapped_p in | |
3392 | current rows is 0. */ | |
3393 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3394 | { | |
e876ff42 | 3395 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3396 | |
3397 | if (!row->enabled_p) | |
3398 | break; | |
3399 | else if (row->mode_line_p) | |
3400 | continue; | |
177c0ea7 | 3401 | |
408f5064 GM |
3402 | if (row->overlapped_p) |
3403 | { | |
3404 | enum glyph_row_area area; | |
177c0ea7 | 3405 | |
408f5064 GM |
3406 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3407 | { | |
3408 | updated_row = row; | |
3409 | updated_area = area; | |
fa971ac3 KL |
3410 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3411 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3412 | if (row->used[area]) |
fa971ac3 KL |
3413 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3414 | row->used[area]); | |
3415 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3416 | } |
177c0ea7 | 3417 | |
408f5064 GM |
3418 | row->overlapped_p = 0; |
3419 | } | |
3420 | ||
e876ff42 | 3421 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3422 | break; |
3423 | } | |
3424 | } | |
3425 | ||
3426 | ||
3427 | /* Redraw lines from the current matrix of window W that overlap | |
3428 | others. YB is bottom-most y-position in W. */ | |
3429 | ||
3430 | static void | |
971de7fb | 3431 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3432 | { |
3433 | int i, bottom_y; | |
3434 | struct glyph_row *row; | |
fa971ac3 | 3435 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3436 | |
408f5064 GM |
3437 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3438 | { | |
3439 | row = w->current_matrix->rows + i; | |
3440 | ||
3441 | if (!row->enabled_p) | |
3442 | break; | |
3443 | else if (row->mode_line_p) | |
3444 | continue; | |
177c0ea7 | 3445 | |
408f5064 GM |
3446 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3447 | ||
b4b2c2ca | 3448 | if (row->overlapping_p) |
408f5064 | 3449 | { |
41124e06 YM |
3450 | int overlaps = 0; |
3451 | ||
b4b2c2ca | 3452 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3453 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3454 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3455 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3456 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3457 | overlaps |= OVERLAPS_SUCC; | |
3458 | ||
3459 | if (overlaps) | |
3460 | { | |
3461 | if (row->used[LEFT_MARGIN_AREA]) | |
3462 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3463 | ||
3464 | if (row->used[TEXT_AREA]) | |
3465 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3466 | ||
3467 | if (row->used[RIGHT_MARGIN_AREA]) | |
3468 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3469 | ||
3470 | /* Record in neighbour rows that ROW overwrites part of | |
3471 | their display. */ | |
3472 | if (overlaps & OVERLAPS_PRED) | |
3473 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3474 | if (overlaps & OVERLAPS_SUCC) | |
3475 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3476 | } | |
408f5064 GM |
3477 | } |
3478 | ||
3479 | if (bottom_y >= yb) | |
3480 | break; | |
3481 | } | |
3482 | } | |
3483 | ||
93e023fc KS |
3484 | #endif /* HAVE_WINDOW_SYSTEM */ |
3485 | ||
408f5064 | 3486 | |
09ad5a91 | 3487 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3488 | |
3489 | /* Check that no row in the current matrix of window W is enabled | |
3490 | which is below what's displayed in the window. */ | |
3491 | ||
09ad5a91 | 3492 | static void |
971de7fb | 3493 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3494 | { |
3495 | int last_seen_p = 0; | |
3496 | int i, yb = window_text_bottom_y (w); | |
3497 | ||
3498 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3499 | { | |
3500 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3501 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3502 | last_seen_p = 1; | |
3503 | else if (last_seen_p && row->enabled_p) | |
3504 | abort (); | |
3505 | } | |
3506 | } | |
3507 | ||
3508 | #endif /* GLYPH_DEBUG */ | |
3509 | ||
3510 | ||
5f5c8ee5 GM |
3511 | /* Update display of window W. FORCE_P non-zero means that we should |
3512 | not stop when detecting pending input. */ | |
3513 | ||
3514 | static int | |
971de7fb | 3515 | update_window (struct window *w, int force_p) |
4588ec20 | 3516 | { |
5f5c8ee5 GM |
3517 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3518 | int paused_p; | |
d012c62b | 3519 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3520 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3521 | #endif |
597cfb3f | 3522 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3523 | #if GLYPH_DEBUG |
5f5c8ee5 | 3524 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3525 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3526 | #endif |
5f5c8ee5 GM |
3527 | |
3528 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3529 | #if !PERIODIC_PREEMPTION_CHECKING |
3530 | if (!force_p) | |
a2d5fca0 | 3531 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3532 | #endif |
4588ec20 | 3533 | |
5f5c8ee5 GM |
3534 | /* If forced to complete the update, or if no input is pending, do |
3535 | the update. */ | |
8fd9a666 | 3536 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3537 | { |
5f5c8ee5 GM |
3538 | struct glyph_row *row, *end; |
3539 | struct glyph_row *mode_line_row; | |
56974e03 | 3540 | struct glyph_row *header_line_row; |
0bc32927 PE |
3541 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3542 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3543 | int n_updated = 0; | |
3544 | #endif | |
5f5c8ee5 GM |
3545 | |
3546 | rif->update_window_begin_hook (w); | |
3547 | yb = window_text_bottom_y (w); | |
3548 | ||
153a073c PJ |
3549 | /* If window has a header line, update it before everything else. |
3550 | Adjust y-positions of other rows by the header line height. */ | |
5f5c8ee5 GM |
3551 | row = desired_matrix->rows; |
3552 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3553 | |
5f5c8ee5 | 3554 | if (row->mode_line_p) |
56974e03 GM |
3555 | { |
3556 | header_line_row = row; | |
3557 | ++row; | |
3558 | } | |
3559 | else | |
3560 | header_line_row = NULL; | |
5f5c8ee5 GM |
3561 | |
3562 | /* Update the mode line, if necessary. */ | |
3563 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3564 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3565 | { | |
3566 | mode_line_row->y = yb; | |
3567 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3568 | desired_matrix), |
3569 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3570 | } |
3571 | ||
3572 | /* Find first enabled row. Optimizations in redisplay_internal | |
3573 | may lead to an update with only one row enabled. There may | |
3574 | be also completely empty matrices. */ | |
3575 | while (row < end && !row->enabled_p) | |
3576 | ++row; | |
177c0ea7 | 3577 | |
bfdcafe1 | 3578 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3579 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3580 | { |
3581 | int rc = scrolling_window (w, header_line_row != NULL); | |
3582 | if (rc < 0) | |
3583 | { | |
3584 | /* All rows were found to be equal. */ | |
3585 | paused_p = 0; | |
3586 | goto set_cursor; | |
3587 | } | |
3588 | else if (rc > 0) | |
6b61353c KH |
3589 | { |
3590 | /* We've scrolled the display. */ | |
3591 | force_p = 1; | |
3592 | changed_p = 1; | |
3593 | } | |
5f5c8ee5 GM |
3594 | } |
3595 | ||
3596 | /* Update the rest of the lines. */ | |
0bc32927 | 3597 | for (; row < end && (force_p || !input_pending); ++row) |
b7412313 | 3598 | if (row->enabled_p) |
5f5c8ee5 GM |
3599 | { |
3600 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3601 | int i; | |
177c0ea7 | 3602 | |
153a073c | 3603 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3604 | detect_input_pending. If it's done too often, |
3605 | scrolling large windows with repeated scroll-up | |
3606 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3607 | #if PERIODIC_PREEMPTION_CHECKING |
3608 | if (!force_p) | |
3609 | { | |
3610 | EMACS_TIME tm, dif; | |
3611 | EMACS_GET_TIME (tm); | |
3612 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3613 | if (EMACS_TIME_NEG_P (dif)) | |
3614 | { | |
3615 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3616 | if (detect_input_pending_ignore_squeezables ()) |
3617 | break; | |
d012c62b KS |
3618 | } |
3619 | } | |
3620 | #else | |
e87b8809 | 3621 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3622 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3623 | #endif |
e876ff42 GM |
3624 | changed_p |= update_window_line (w, vpos, |
3625 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3626 | |
3627 | /* Mark all rows below the last visible one in the current | |
3628 | matrix as invalid. This is necessary because of | |
3629 | variable line heights. Consider the case of three | |
3630 | successive redisplays, where the first displays 5 | |
3631 | lines, the second 3 lines, and the third 5 lines again. | |
3632 | If the second redisplay wouldn't mark rows in the | |
3633 | current matrix invalid, the third redisplay might be | |
3634 | tempted to optimize redisplay based on lines displayed | |
3635 | in the first redisplay. */ | |
3636 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3637 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3638 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3639 | } | |
3640 | ||
3641 | /* Was display preempted? */ | |
3642 | paused_p = row < end; | |
177c0ea7 | 3643 | |
56974e03 | 3644 | set_cursor: |
177c0ea7 | 3645 | |
6b61353c KH |
3646 | /* Update the header line after scrolling because a new header |
3647 | line would otherwise overwrite lines at the top of the window | |
3648 | that can be scrolled. */ | |
3649 | if (header_line_row && header_line_row->enabled_p) | |
3650 | { | |
3651 | header_line_row->y = 0; | |
3652 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3653 | } |
3654 | ||
153a073c | 3655 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3656 | if (!paused_p && !w->pseudo_window_p) |
3657 | { | |
93e023fc | 3658 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3659 | if (changed_p && rif->fix_overlapping_area) |
3660 | { | |
3661 | redraw_overlapped_rows (w, yb); | |
3662 | redraw_overlapping_rows (w, yb); | |
3663 | } | |
93e023fc | 3664 | #endif |
177c0ea7 | 3665 | |
5f5c8ee5 GM |
3666 | /* Make cursor visible at cursor position of W. */ |
3667 | set_window_cursor_after_update (w); | |
3668 | ||
e876ff42 GM |
3669 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3670 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3671 | IF_DEBUG (check_matrix_invariants (w)); |
3672 | #endif | |
4588ec20 | 3673 | } |
5f5c8ee5 GM |
3674 | |
3675 | #if GLYPH_DEBUG | |
3676 | /* Remember the redisplay method used to display the matrix. */ | |
3677 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3678 | #endif | |
408f5064 | 3679 | |
6b61353c KH |
3680 | #ifdef HAVE_WINDOW_SYSTEM |
3681 | update_window_fringes (w, 0); | |
3682 | #endif | |
3683 | ||
56974e03 GM |
3684 | /* End the update of window W. Don't set the cursor if we |
3685 | paused updating the display because in this case, | |
3686 | set_window_cursor_after_update hasn't been called, and | |
3687 | output_cursor doesn't contain the cursor location. */ | |
3688 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3689 | } |
5f5c8ee5 GM |
3690 | else |
3691 | paused_p = 1; | |
3692 | ||
2d5912c1 | 3693 | #if GLYPH_DEBUG |
0cffd9d8 | 3694 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3695 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3696 | #endif | |
177c0ea7 | 3697 | |
5f5c8ee5 | 3698 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3699 | |
5f5c8ee5 | 3700 | return paused_p; |
4588ec20 JB |
3701 | } |
3702 | ||
b64b3980 | 3703 | |
5f5c8ee5 GM |
3704 | /* Update the display of area AREA in window W, row number VPOS. |
3705 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3706 | ||
3707 | static void | |
971de7fb | 3708 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3709 | { |
5f5c8ee5 | 3710 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3711 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3712 | |
3713 | /* Let functions in xterm.c know what area subsequent X positions | |
3714 | will be relative to. */ | |
3715 | updated_area = area; | |
3716 | ||
3717 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3718 | of the area. I don't think that something more sophisticated is | |
3719 | necessary here, since marginal areas will not be the default. */ | |
3720 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3721 | if (desired_row->used[area]) | |
3722 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3723 | rif->clear_end_of_line (-1); | |
b64b3980 | 3724 | } |
23b0200c | 3725 | |
352f1545 | 3726 | |
408f5064 GM |
3727 | /* Update the display of the text area of row VPOS in window W. |
3728 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3729 | |
408f5064 | 3730 | static int |
971de7fb | 3731 | update_text_area (struct window *w, int vpos) |
23b0200c | 3732 | { |
5f5c8ee5 GM |
3733 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3734 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3735 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3736 | int changed_p = 0; |
5f5c8ee5 GM |
3737 | |
3738 | /* Let functions in xterm.c know what area subsequent X positions | |
3739 | will be relative to. */ | |
3740 | updated_area = TEXT_AREA; | |
177c0ea7 | 3741 | |
5f5c8ee5 GM |
3742 | /* If rows are at different X or Y, or rows have different height, |
3743 | or the current row is marked invalid, write the entire line. */ | |
3744 | if (!current_row->enabled_p | |
3745 | || desired_row->y != current_row->y | |
3746 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3747 | || desired_row->phys_ascent != current_row->phys_ascent |
3748 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3749 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3750 | || current_row->overlapped_p |
fee8b690 CY |
3751 | /* This next line is necessary for correctly redrawing |
3752 | mouse-face areas after scrolling and other operations. | |
3753 | However, it causes excessive flickering when mouse is moved | |
3754 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3755 | line doesn't seem to hurt anything. -- cyd. |
3756 | But it is still needed for the header line. -- kfs. */ | |
3757 | || (current_row->mouse_face_p | |
3758 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3759 | || current_row->x != desired_row->x) |
3760 | { | |
3761 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3762 | |
5f5c8ee5 GM |
3763 | if (desired_row->used[TEXT_AREA]) |
3764 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3765 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3766 | |
5f5c8ee5 GM |
3767 | /* Clear to end of window. */ |
3768 | rif->clear_end_of_line (-1); | |
408f5064 | 3769 | changed_p = 1; |
60f2f3f1 GM |
3770 | |
3771 | /* This erases the cursor. We do this here because | |
3772 | notice_overwritten_cursor cannot easily check this, which | |
3773 | might indicate that the whole functionality of | |
3774 | notice_overwritten_cursor would better be implemented here. | |
3775 | On the other hand, we need notice_overwritten_cursor as long | |
3776 | as mouse highlighting is done asynchronously outside of | |
3777 | redisplay. */ | |
3778 | if (vpos == w->phys_cursor.vpos) | |
3779 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3780 | } |
3781 | else | |
3782 | { | |
3783 | int stop, i, x; | |
3784 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3785 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3786 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3787 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3788 | int abort_skipping = 0; |
5f5c8ee5 | 3789 | |
78897758 YM |
3790 | /* If the desired row extends its face to the text area end, and |
3791 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3792 | make sure we write at least one glyph, so that the face |
3793 | extension actually takes place. */ | |
78897758 YM |
3794 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3795 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3796 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3797 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3798 | --desired_stop_pos; |
177c0ea7 | 3799 | |
5f5c8ee5 GM |
3800 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3801 | i = 0; | |
3802 | x = desired_row->x; | |
8399f8a0 GM |
3803 | |
3804 | /* Loop over glyphs that current and desired row may have | |
3805 | in common. */ | |
5f5c8ee5 | 3806 | while (i < stop) |
352f1545 | 3807 | { |
91d227d9 | 3808 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3809 | |
5f5c8ee5 | 3810 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3811 | don't have to be written. We can't skip if the last |
3812 | current glyph overlaps the glyph to its right. For | |
3813 | example, consider a current row of `if ' with the `f' in | |
3814 | Courier bold so that it overlaps the ` ' to its right. | |
3815 | If the desired row is ` ', we would skip over the space | |
3816 | after the `if' and there would remain a pixel from the | |
3817 | `f' on the screen. */ | |
3818 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3819 | { |
e47306e6 GM |
3820 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3821 | int left, right; | |
177c0ea7 | 3822 | |
e47306e6 GM |
3823 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3824 | &left, &right); | |
91d227d9 | 3825 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3826 | } |
177c0ea7 | 3827 | |
6d950f4c | 3828 | if (can_skip_p) |
352f1545 | 3829 | { |
91d227d9 CY |
3830 | int start_hpos = i; |
3831 | ||
6d950f4c GM |
3832 | while (i < stop |
3833 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3834 | { | |
3835 | x += desired_glyph->pixel_width; | |
3836 | ++desired_glyph, ++current_glyph, ++i; | |
3837 | } | |
3838 | ||
3839 | /* Consider the case that the current row contains "xxx | |
3840 | ppp ggg" in italic Courier font, and the desired row | |
3841 | is "xxx ggg". The character `p' has lbearing, `g' | |
3842 | has not. The loop above will stop in front of the | |
3843 | first `p' in the current row. If we would start | |
3844 | writing glyphs there, we wouldn't erase the lbearing | |
3845 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3846 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3847 | if (overlapping_glyphs_p |
3848 | && i > 0 | |
3849 | && i < current_row->used[TEXT_AREA] | |
3850 | && (current_row->used[TEXT_AREA] | |
3851 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3852 | { |
6d950f4c | 3853 | int left, right; |
177c0ea7 | 3854 | |
6d950f4c GM |
3855 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3856 | &left, &right); | |
3857 | while (left > 0 && i > 0) | |
3858 | { | |
3859 | --i, --desired_glyph, --current_glyph; | |
3860 | x -= desired_glyph->pixel_width; | |
3861 | left -= desired_glyph->pixel_width; | |
3862 | } | |
91d227d9 CY |
3863 | |
3864 | /* Abort the skipping algorithm if we end up before | |
3865 | our starting point, to avoid looping (bug#1070). | |
3866 | This can happen when the lbearing is larger than | |
3867 | the pixel width. */ | |
3868 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3869 | } |
352f1545 | 3870 | } |
177c0ea7 | 3871 | |
5f5c8ee5 GM |
3872 | /* Try to avoid writing the entire rest of the desired row |
3873 | by looking for a resync point. This mainly prevents | |
3874 | mode line flickering in the case the mode line is in | |
3875 | fixed-pitch font, which it usually will be. */ | |
3876 | if (i < desired_row->used[TEXT_AREA]) | |
3877 | { | |
3878 | int start_x = x, start_hpos = i; | |
3879 | struct glyph *start = desired_glyph; | |
3880 | int current_x = x; | |
6d950f4c GM |
3881 | int skip_first_p = !can_skip_p; |
3882 | ||
5f5c8ee5 GM |
3883 | /* Find the next glyph that's equal again. */ |
3884 | while (i < stop | |
6d950f4c GM |
3885 | && (skip_first_p |
3886 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3887 | && x == current_x) |
3888 | { | |
3889 | x += desired_glyph->pixel_width; | |
3890 | current_x += current_glyph->pixel_width; | |
3891 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3892 | skip_first_p = 0; |
5f5c8ee5 | 3893 | } |
23b0200c | 3894 | |
5f5c8ee5 GM |
3895 | if (i == start_hpos || x != current_x) |
3896 | { | |
3897 | i = start_hpos; | |
3898 | x = start_x; | |
3899 | desired_glyph = start; | |
3900 | break; | |
3901 | } | |
e47306e6 | 3902 | |
5f5c8ee5 GM |
3903 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3904 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3905 | changed_p = 1; |
5f5c8ee5 GM |
3906 | } |
3907 | } | |
177c0ea7 | 3908 | |
5f5c8ee5 GM |
3909 | /* Write the rest. */ |
3910 | if (i < desired_row->used[TEXT_AREA]) | |
3911 | { | |
3912 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3913 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3914 | changed_p = 1; |
5f5c8ee5 | 3915 | } |
177c0ea7 | 3916 | |
5f5c8ee5 GM |
3917 | /* Maybe clear to end of line. */ |
3918 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3919 | { | |
3920 | /* If new row extends to the end of the text area, nothing | |
3921 | has to be cleared, if and only if we did a write_glyphs | |
3922 | above. This is made sure by setting desired_stop_pos | |
3923 | appropriately above. */ | |
78897758 YM |
3924 | xassert (i < desired_row->used[TEXT_AREA] |
3925 | || ((desired_row->used[TEXT_AREA] | |
3926 | == current_row->used[TEXT_AREA]) | |
3927 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3928 | } |
3929 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3930 | { | |
3931 | /* If old row extends to the end of the text area, clear. */ | |
3932 | if (i >= desired_row->used[TEXT_AREA]) | |
3933 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3934 | desired_row->pixel_width); |
5f5c8ee5 | 3935 | rif->clear_end_of_line (-1); |
408f5064 | 3936 | changed_p = 1; |
5f5c8ee5 GM |
3937 | } |
3938 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3939 | { |
5f5c8ee5 GM |
3940 | /* Otherwise clear to the end of the old row. Everything |
3941 | after that position should be clear already. */ | |
27786b2f | 3942 | int xlim; |
177c0ea7 | 3943 | |
5f5c8ee5 GM |
3944 | if (i >= desired_row->used[TEXT_AREA]) |
3945 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3946 | desired_row->pixel_width); |
5f5c8ee5 GM |
3947 | |
3948 | /* If cursor is displayed at the end of the line, make sure | |
3949 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3950 | with which to erase the cursor (because this method | |
3951 | doesn't work with lbearing/rbearing), so we must do it | |
3952 | this way. */ | |
3953 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3954 | && (desired_row->reversed_p |
3955 | ? (w->phys_cursor.hpos < 0) | |
3956 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3957 | { |
3958 | w->phys_cursor_on_p = 0; | |
27786b2f | 3959 | xlim = -1; |
5f5c8ee5 GM |
3960 | } |
3961 | else | |
27786b2f PE |
3962 | xlim = current_row->pixel_width; |
3963 | rif->clear_end_of_line (xlim); | |
408f5064 | 3964 | changed_p = 1; |
2e8907d3 | 3965 | } |
23b0200c | 3966 | } |
408f5064 GM |
3967 | |
3968 | return changed_p; | |
23b0200c | 3969 | } |
4588ec20 | 3970 | |
5f5c8ee5 | 3971 | |
408f5064 GM |
3972 | /* Update row VPOS in window W. Value is non-zero if display has been |
3973 | changed. */ | |
5f5c8ee5 | 3974 | |
408f5064 | 3975 | static int |
971de7fb | 3976 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
3977 | { |
3978 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3979 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3980 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3981 | int changed_p = 0; |
5f5c8ee5 | 3982 | |
5f5c8ee5 GM |
3983 | /* Set the row being updated. This is important to let xterm.c |
3984 | know what line height values are in effect. */ | |
3985 | updated_row = desired_row; | |
3986 | ||
177c0ea7 JB |
3987 | /* A row can be completely invisible in case a desired matrix was |
3988 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3989 | the matrix. Make sure to make such rows current anyway, since |
3990 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3991 | if (desired_row->mode_line_p |
3992 | || desired_row->visible_height > 0) | |
408f5064 | 3993 | { |
504805ac GM |
3994 | xassert (desired_row->enabled_p); |
3995 | ||
3996 | /* Update display of the left margin area, if there is one. */ | |
3997 | if (!desired_row->full_width_p | |
7df02016 | 3998 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3999 | { |
4000 | changed_p = 1; | |
4001 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4002 | } | |
177c0ea7 | 4003 | |
504805ac GM |
4004 | /* Update the display of the text area. */ |
4005 | if (update_text_area (w, vpos)) | |
4006 | { | |
4007 | changed_p = 1; | |
4008 | if (current_row->mouse_face_p) | |
4009 | *mouse_face_overwritten_p = 1; | |
4010 | } | |
177c0ea7 | 4011 | |
504805ac GM |
4012 | /* Update display of the right margin area, if there is one. */ |
4013 | if (!desired_row->full_width_p | |
7df02016 | 4014 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4015 | { |
4016 | changed_p = 1; | |
4017 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4018 | } | |
177c0ea7 | 4019 | |
504805ac GM |
4020 | /* Draw truncation marks etc. */ |
4021 | if (!current_row->enabled_p | |
4022 | || desired_row->y != current_row->y | |
4023 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4024 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4025 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4026 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4027 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4028 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4029 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4030 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4031 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4032 | } |
177c0ea7 | 4033 | |
5f5c8ee5 GM |
4034 | /* Update current_row from desired_row. */ |
4035 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4036 | updated_row = NULL; | |
408f5064 | 4037 | return changed_p; |
5f5c8ee5 GM |
4038 | } |
4039 | ||
4040 | ||
4041 | /* Set the cursor after an update of window W. This function may only | |
4042 | be called from update_window. */ | |
4043 | ||
4044 | static void | |
971de7fb | 4045 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4046 | { |
5f5c8ee5 | 4047 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4048 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4049 | int cx, cy, vpos, hpos; |
4050 | ||
4051 | /* Not intended for frame matrix updates. */ | |
4052 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4053 | |
b96fd3e8 GM |
4054 | if (cursor_in_echo_area |
4055 | && !NILP (echo_area_buffer[0]) | |
4056 | /* If we are showing a message instead of the mini-buffer, | |
4057 | show the cursor for the message instead. */ | |
4058 | && XWINDOW (minibuf_window) == w | |
4059 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4060 | /* These cases apply only to the frame that contains |
4061 | the active mini-buffer window. */ | |
4062 | && FRAME_HAS_MINIBUF_P (f) | |
4063 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4064 | { | |
4065 | cx = cy = vpos = hpos = 0; | |
4066 | ||
4067 | if (cursor_in_echo_area >= 0) | |
4068 | { | |
4069 | /* If the mini-buffer is several lines high, find the last | |
4070 | line that has any text on it. Note: either all lines | |
4071 | are enabled or none. Otherwise we wouldn't be able to | |
4072 | determine Y. */ | |
862b4790 GM |
4073 | struct glyph_row *row, *last_row; |
4074 | struct glyph *glyph; | |
4075 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4076 | |
862b4790 | 4077 | last_row = NULL; |
6206f8ce GM |
4078 | row = w->current_matrix->rows; |
4079 | while (row->enabled_p | |
4080 | && (last_row == NULL | |
4081 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4082 | { |
862b4790 GM |
4083 | if (row->used[TEXT_AREA] |
4084 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4085 | last_row = row; | |
6206f8ce | 4086 | ++row; |
862b4790 | 4087 | } |
177c0ea7 | 4088 | |
5f5c8ee5 GM |
4089 | if (last_row) |
4090 | { | |
6206f8ce GM |
4091 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4092 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4093 | |
b96fd3e8 | 4094 | while (last > start && last->charpos < 0) |
862b4790 | 4095 | --last; |
177c0ea7 | 4096 | |
862b4790 GM |
4097 | for (glyph = start; glyph < last; ++glyph) |
4098 | { | |
4099 | cx += glyph->pixel_width; | |
4100 | ++hpos; | |
4101 | } | |
4102 | ||
5f5c8ee5 | 4103 | cy = last_row->y; |
862b4790 | 4104 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4105 | } |
4106 | } | |
4107 | } | |
4108 | else | |
4109 | { | |
4110 | cx = w->cursor.x; | |
4111 | cy = w->cursor.y; | |
4112 | hpos = w->cursor.hpos; | |
4113 | vpos = w->cursor.vpos; | |
4114 | } | |
4588ec20 | 4115 | |
5f5c8ee5 | 4116 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4117 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4118 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4119 | vpos = max (0, vpos); | |
4120 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4121 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4122 | } |
4588ec20 | 4123 | |
5f5c8ee5 | 4124 | |
6df5d75f GM |
4125 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4126 | tree rooted at W. */ | |
4127 | ||
4128 | void | |
971de7fb | 4129 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4130 | { |
4131 | while (w) | |
4132 | { | |
4133 | if (!NILP (w->hchild)) | |
4134 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4135 | else if (!NILP (w->vchild)) | |
4136 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4137 | else | |
4138 | w->must_be_updated_p = on_p; | |
4139 | ||
4140 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4141 | } | |
177c0ea7 | 4142 | } |
6df5d75f GM |
4143 | |
4144 | ||
4145 | \f | |
4146 | /*********************************************************************** | |
4147 | Window-Based Scrolling | |
4148 | ***********************************************************************/ | |
4149 | ||
4150 | /* Structure describing rows in scrolling_window. */ | |
4151 | ||
4152 | struct row_entry | |
4153 | { | |
4154 | /* Number of occurrences of this row in desired and current matrix. */ | |
4155 | int old_uses, new_uses; | |
177c0ea7 | 4156 | |
6df5d75f GM |
4157 | /* Vpos of row in new matrix. */ |
4158 | int new_line_number; | |
4159 | ||
4160 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4161 | ptrdiff_t bucket; |
177c0ea7 | 4162 | |
6df5d75f GM |
4163 | /* The row described by this entry. */ |
4164 | struct glyph_row *row; | |
177c0ea7 | 4165 | |
6df5d75f GM |
4166 | /* Hash collision chain. */ |
4167 | struct row_entry *next; | |
4168 | }; | |
4169 | ||
4170 | /* A pool to allocate row_entry structures from, and the size of the | |
4171 | pool. The pool is reallocated in scrolling_window when we find | |
4172 | that we need a larger one. */ | |
4173 | ||
4174 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4175 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4176 | |
4177 | /* Index of next free entry in row_entry_pool. */ | |
4178 | ||
ca9ce8f2 | 4179 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4180 | |
4181 | /* The hash table used during scrolling, and the table's size. This | |
4182 | table is used to quickly identify equal rows in the desired and | |
4183 | current matrix. */ | |
4184 | ||
4185 | static struct row_entry **row_table; | |
ca9ce8f2 | 4186 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4187 | |
4188 | /* Vectors of pointers to row_entry structures belonging to the | |
4189 | current and desired matrix, and the size of the vectors. */ | |
4190 | ||
4191 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4192 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4193 | |
4194 | /* A pool to allocate run structures from, and its size. */ | |
4195 | ||
4196 | static struct run *run_pool; | |
0065d054 | 4197 | static ptrdiff_t runs_size; |
6df5d75f GM |
4198 | |
4199 | /* A vector of runs of lines found during scrolling. */ | |
4200 | ||
4201 | static struct run **runs; | |
4202 | ||
6b1f9ba4 | 4203 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4204 | |
55d4c1b2 | 4205 | static inline struct row_entry * |
6b1f9ba4 | 4206 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4207 | { |
4208 | struct row_entry *entry; | |
ca9ce8f2 | 4209 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4210 | |
6df5d75f | 4211 | entry = row_table[i]; |
6b1f9ba4 | 4212 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4213 | entry = entry->next; |
177c0ea7 | 4214 | |
6df5d75f GM |
4215 | if (entry == NULL) |
4216 | { | |
4217 | entry = row_entry_pool + row_entry_idx++; | |
4218 | entry->row = row; | |
4219 | entry->old_uses = entry->new_uses = 0; | |
4220 | entry->new_line_number = 0; | |
4221 | entry->bucket = i; | |
4222 | entry->next = row_table[i]; | |
4223 | row_table[i] = entry; | |
4224 | } | |
4225 | ||
4226 | return entry; | |
4227 | } | |
4228 | ||
4229 | ||
5f5c8ee5 | 4230 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4231 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4232 | |
4233 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4234 | Technique for Isolating Differences Between Files." It should take | |
4235 | O(N) time. | |
4236 | ||
4237 | A short outline of the steps of the algorithm | |
4238 | ||
4239 | 1. Skip lines equal at the start and end of both matrices. | |
4240 | ||
4241 | 2. Enter rows in the current and desired matrix into a symbol | |
4242 | table, counting how often they appear in both matrices. | |
4243 | ||
4244 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4245 | i.e. we assume that such lines are likely to have been moved. | |
4246 | ||
4247 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4248 | forward and backward. | |
4249 | ||
4250 | Value is | |
4251 | ||
4252 | -1 if all rows were found to be equal. | |
4253 | 0 to indicate that we did not scroll the display, or | |
4254 | 1 if we did scroll. */ | |
4255 | ||
4256 | static int | |
971de7fb | 4257 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4258 | { |
5f5c8ee5 GM |
4259 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4260 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4261 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4262 | ptrdiff_t i; |
4263 | int j, first_old, first_new, last_old, last_new; | |
4264 | int nruns, run_idx; | |
0065d054 | 4265 | ptrdiff_t n; |
6df5d75f | 4266 | struct row_entry *entry; |
fa971ac3 | 4267 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4268 | |
4269 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4270 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4271 | { |
bfdcafe1 GM |
4272 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4273 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4274 | ||
4275 | if (c->enabled_p | |
4276 | && d->enabled_p | |
6b61353c | 4277 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4278 | && c->y == d->y |
4279 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4280 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4281 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4282 | { |
4283 | assign_row (c, d); | |
4284 | d->enabled_p = 0; | |
4285 | } | |
4286 | else | |
4287 | break; | |
5f5c8ee5 | 4288 | } |
4588ec20 | 4289 | |
5f5c8ee5 GM |
4290 | /* Give up if some rows in the desired matrix are not enabled. */ |
4291 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4292 | return -1; | |
177c0ea7 | 4293 | |
5f5c8ee5 GM |
4294 | first_old = first_new = i; |
4295 | ||
4d8ade89 YM |
4296 | /* Set last_new to the index + 1 of the row that reaches the |
4297 | bottom boundary in the desired matrix. Give up if we find a | |
4298 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4299 | i = first_new + 1; |
4d8ade89 YM |
4300 | while (i < desired_matrix->nrows - 1) |
4301 | { | |
4302 | int bottom; | |
5f5c8ee5 | 4303 | |
4d8ade89 YM |
4304 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4305 | return 0; | |
4306 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4307 | if (bottom <= yb) | |
4308 | ++i; | |
4309 | if (bottom >= yb) | |
4310 | break; | |
4311 | } | |
5f5c8ee5 GM |
4312 | |
4313 | last_new = i; | |
4314 | ||
4d8ade89 YM |
4315 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4316 | boundary in the current matrix. We don't look at the enabled | |
4317 | flag here because we plan to reuse part of the display even if | |
4318 | other parts are disabled. */ | |
5f5c8ee5 | 4319 | i = first_old + 1; |
93962bfa GM |
4320 | while (i < current_matrix->nrows - 1) |
4321 | { | |
4322 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4323 | if (bottom <= yb) | |
4324 | ++i; | |
4325 | if (bottom >= yb) | |
4326 | break; | |
4327 | } | |
4328 | ||
5f5c8ee5 GM |
4329 | last_old = i; |
4330 | ||
4331 | /* Skip over rows equal at the bottom. */ | |
4332 | i = last_new; | |
4333 | j = last_old; | |
4334 | while (i - 1 > first_new | |
4335 | && j - 1 > first_old | |
4336 | && MATRIX_ROW (current_matrix, i - 1)->enabled_p | |
4337 | && (MATRIX_ROW (current_matrix, i - 1)->y | |
4338 | == MATRIX_ROW (desired_matrix, j - 1)->y) | |
6b61353c | 4339 | && !MATRIX_ROW (desired_matrix, j - 1)->redraw_fringe_bitmaps_p |
6b1f9ba4 | 4340 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4341 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4342 | --i, --j; |
4343 | last_new = i; | |
4344 | last_old = j; | |
4345 | ||
4346 | /* Nothing to do if all rows are equal. */ | |
4347 | if (last_new == first_new) | |
4348 | return 0; | |
4349 | ||
0065d054 | 4350 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4351 | |
4352 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4353 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4354 | So, set next_almost_prime_increment_max to 10. | |
4355 | ||
4356 | It's just a coincidence that next_almost_prime_increment_max == | |
4357 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4358 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4359 | because next_almost_prime (113) would be 127. */ | |
4360 | { | |
4361 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4362 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4363 | ptrdiff_t row_table_max = |
0065d054 PE |
4364 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4365 | - next_almost_prime_increment_max); | |
4366 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4367 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4368 | memory_full (SIZE_MAX); |
4369 | } | |
4370 | ||
6df5d75f | 4371 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4372 | |
6df5d75f | 4373 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4374 | old_lines = xpalloc (old_lines, &old_lines_size, |
4375 | current_matrix->nrows - old_lines_size, | |
4376 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4377 | |
6df5d75f | 4378 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4379 | new_lines = xpalloc (new_lines, &new_lines_size, |
4380 | desired_matrix->nrows - new_lines_size, | |
4381 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4382 | |
ca9ce8f2 PE |
4383 | n = desired_matrix->nrows; |
4384 | n += current_matrix->nrows; | |
0065d054 | 4385 | if (row_table_size < 3 * n) |
6df5d75f | 4386 | { |
ca9ce8f2 | 4387 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4388 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4389 | row_table_size = size; |
0065d054 | 4390 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4391 | } |
4392 | ||
4393 | if (n > row_entry_pool_size) | |
0065d054 PE |
4394 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4395 | n - row_entry_pool_size, | |
4396 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4397 | |
4398 | if (desired_matrix->nrows > runs_size) | |
4399 | { | |
0065d054 PE |
4400 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4401 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4402 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4403 | } |
4404 | ||
4405 | nruns = run_idx = 0; | |
4406 | row_entry_idx = 0; | |
4407 | ||
4408 | /* Add rows from the current and desired matrix to the hash table | |
4409 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4410 | |
5f5c8ee5 GM |
4411 | for (i = first_old; i < last_old; ++i) |
4412 | { | |
4413 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4414 | { | |
6b1f9ba4 | 4415 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4416 | old_lines[i] = entry; |
4417 | ++entry->old_uses; | |
5f5c8ee5 GM |
4418 | } |
4419 | else | |
6df5d75f | 4420 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4421 | } |
4422 | ||
5f5c8ee5 GM |
4423 | for (i = first_new; i < last_new; ++i) |
4424 | { | |
4425 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6b1f9ba4 | 4426 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4427 | ++entry->new_uses; |
4428 | entry->new_line_number = i; | |
4429 | new_lines[i] = entry; | |
5f5c8ee5 | 4430 | } |
4588ec20 | 4431 | |
5f5c8ee5 GM |
4432 | /* Identify moves based on lines that are unique and equal |
4433 | in both matrices. */ | |
4434 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4435 | if (old_lines[i] |
4436 | && old_lines[i]->old_uses == 1 | |
4437 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4438 | { |
27786b2f | 4439 | int p, q; |
6df5d75f GM |
4440 | int new_line = old_lines[i]->new_line_number; |
4441 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4442 | |
4443 | /* Record move. */ | |
4444 | run->current_vpos = i; | |
4445 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4446 | run->desired_vpos = new_line; | |
4447 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4448 | run->nrows = 1; | |
4449 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4450 | ||
4451 | /* Extend backward. */ | |
27786b2f PE |
4452 | p = i - 1; |
4453 | q = new_line - 1; | |
4454 | while (p > first_old | |
4455 | && q > first_new | |
4456 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4457 | { |
27786b2f | 4458 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4459 | --run->current_vpos; |
4460 | --run->desired_vpos; | |
5f5c8ee5 GM |
4461 | ++run->nrows; |
4462 | run->height += h; | |
4463 | run->desired_y -= h; | |
4464 | run->current_y -= h; | |
27786b2f | 4465 | --p, --q; |
5f5c8ee5 | 4466 | } |
4588ec20 | 4467 | |
5f5c8ee5 | 4468 | /* Extend forward. */ |
27786b2f PE |
4469 | p = i + 1; |
4470 | q = new_line + 1; | |
4471 | while (p < last_old | |
4472 | && q < last_new | |
4473 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4474 | { |
27786b2f | 4475 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4476 | ++run->nrows; |
5f5c8ee5 | 4477 | run->height += h; |
27786b2f | 4478 | ++p, ++q; |
5f5c8ee5 | 4479 | } |
19dff8dc | 4480 | |
5f5c8ee5 GM |
4481 | /* Insert run into list of all runs. Order runs by copied |
4482 | pixel lines. Note that we record runs that don't have to | |
4483 | be copied because they are already in place. This is done | |
4484 | because we can avoid calling update_window_line in this | |
4485 | case. */ | |
27786b2f | 4486 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4487 | ; |
27786b2f PE |
4488 | for (q = nruns; q > p; --q) |
4489 | runs[q] = runs[q - 1]; | |
4490 | runs[p] = run; | |
5f5c8ee5 GM |
4491 | ++nruns; |
4492 | ||
4493 | i += run->nrows; | |
4494 | } | |
4495 | else | |
4496 | ++i; | |
4588ec20 | 4497 | |
5f5c8ee5 GM |
4498 | /* Do the moves. Do it in a way that we don't overwrite something |
4499 | we want to copy later on. This is not solvable in general | |
4500 | because there is only one display and we don't have a way to | |
4501 | exchange areas on this display. Example: | |
4588ec20 | 4502 | |
5f5c8ee5 GM |
4503 | +-----------+ +-----------+ |
4504 | | A | | B | | |
4505 | +-----------+ --> +-----------+ | |
4506 | | B | | A | | |
4507 | +-----------+ +-----------+ | |
4588ec20 | 4508 | |
5f5c8ee5 GM |
4509 | Instead, prefer bigger moves, and invalidate moves that would |
4510 | copy from where we copied to. */ | |
ea0d86af | 4511 | |
5f5c8ee5 GM |
4512 | for (i = 0; i < nruns; ++i) |
4513 | if (runs[i]->nrows > 0) | |
4514 | { | |
4515 | struct run *r = runs[i]; | |
24e86043 | 4516 | |
5f5c8ee5 GM |
4517 | /* Copy on the display. */ |
4518 | if (r->current_y != r->desired_y) | |
4519 | { | |
989b42d2 | 4520 | rif->clear_window_mouse_face (w); |
5f5c8ee5 GM |
4521 | rif->scroll_run_hook (w, r); |
4522 | ||
4523 | /* Invalidate runs that copy from where we copied to. */ | |
4524 | for (j = i + 1; j < nruns; ++j) | |
4525 | { | |
4526 | struct run *p = runs[j]; | |
177c0ea7 | 4527 | |
5f5c8ee5 GM |
4528 | if ((p->current_y >= r->desired_y |
4529 | && p->current_y < r->desired_y + r->height) | |
4530 | || (p->current_y + p->height >= r->desired_y | |
4531 | && (p->current_y + p->height | |
4532 | < r->desired_y + r->height))) | |
4533 | p->nrows = 0; | |
4534 | } | |
4535 | } | |
ea0d86af | 4536 | |
5f5c8ee5 GM |
4537 | /* Assign matrix rows. */ |
4538 | for (j = 0; j < r->nrows; ++j) | |
4539 | { | |
4540 | struct glyph_row *from, *to; | |
408f5064 | 4541 | int to_overlapped_p; |
e876ff42 | 4542 | |
5f5c8ee5 GM |
4543 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4544 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4545 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4546 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 GM |
4547 | assign_row (to, from); |
4548 | to->enabled_p = 1, from->enabled_p = 0; | |
408f5064 | 4549 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4550 | } |
4551 | } | |
15874c59 | 4552 | |
6df5d75f GM |
4553 | /* Clear the hash table, for the next time. */ |
4554 | for (i = 0; i < row_entry_idx; ++i) | |
4555 | row_table[row_entry_pool[i].bucket] = NULL; | |
4556 | ||
aec1708a PE |
4557 | /* Value is 1 to indicate that we scrolled the display. */ |
4558 | return 0 < nruns; | |
5f5c8ee5 | 4559 | } |
de83c314 | 4560 | |
15874c59 | 4561 | |
4588ec20 | 4562 | \f |
5f5c8ee5 GM |
4563 | /************************************************************************ |
4564 | Frame-Based Updates | |
4565 | ************************************************************************/ | |
4588ec20 | 4566 | |
5f5c8ee5 | 4567 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4568 | |
5f5c8ee5 GM |
4569 | FORCE_P non-zero means that the update should not be stopped by |
4570 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4571 | should not be tried. | |
4572 | ||
4573 | Value is non-zero if update was stopped due to pending input. */ | |
4574 | ||
4575 | static int | |
971de7fb | 4576 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4577 | { |
5f5c8ee5 GM |
4578 | /* Frame matrices to work on. */ |
4579 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4580 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4581 | int i; | |
27786b2f | 4582 | int pause_p; |
4588ec20 | 4583 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 GM |
4584 | |
4585 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4586 | |
c37e4889 RS |
4587 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4588 | calculate_costs (f); | |
4589 | ||
d88c2b9e RS |
4590 | if (preempt_count <= 0) |
4591 | preempt_count = 1; | |
4592 | ||
a2130dbb KS |
4593 | #if !PERIODIC_PREEMPTION_CHECKING |
4594 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4595 | { |
27786b2f | 4596 | pause_p = 1; |
4588ec20 JB |
4597 | goto do_pause; |
4598 | } | |
d012c62b | 4599 | #endif |
4588ec20 | 4600 | |
5f5c8ee5 | 4601 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4602 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4603 | inhibit_id_p = 1; |
7098a0fa | 4604 | |
efb859b4 | 4605 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4606 | i/d line if just want cursor motion. */ |
4607 | for (i = 0; i < desired_matrix->nrows; i++) | |
4608 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4609 | break; |
4610 | ||
4611 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4612 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4613 | force_p |= scrolling (f); | |
4588ec20 JB |
4614 | |
4615 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4616 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4617 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4618 | |
5f5c8ee5 GM |
4619 | /* Now update the rest of the lines. */ |
4620 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4621 | { |
5f5c8ee5 | 4622 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4623 | { |
b6a65ac2 | 4624 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4625 | { |
4626 | /* Flush out every so many lines. | |
4627 | Also flush out if likely to have more than 1k buffered | |
4628 | otherwise. I'm told that some telnet connections get | |
4629 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4630 | FILE *display_output = FRAME_TTY (f)->output; |
4631 | if (display_output) | |
4588ec20 | 4632 | { |
fced92f1 CY |
4633 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4634 | if (outq > 900 | |
4635 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4636 | { |
fced92f1 CY |
4637 | fflush (display_output); |
4638 | if (preempt_count == 1) | |
4639 | { | |
a41f8bed | 4640 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4641 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4642 | /* Probably not a tty. Ignore the error and reset | |
4643 | the outq count. */ | |
4644 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4645 | #endif |
fced92f1 CY |
4646 | outq *= 10; |
4647 | if (baud_rate <= outq && baud_rate > 0) | |
4648 | sleep (outq / baud_rate); | |
4649 | } | |
4588ec20 JB |
4650 | } |
4651 | } | |
4588ec20 JB |
4652 | } |
4653 | ||
d012c62b KS |
4654 | #if PERIODIC_PREEMPTION_CHECKING |
4655 | if (!force_p) | |
4656 | { | |
4657 | EMACS_TIME tm, dif; | |
4658 | EMACS_GET_TIME (tm); | |
4659 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4660 | if (EMACS_TIME_NEG_P (dif)) | |
4661 | { | |
4662 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4663 | if (detect_input_pending_ignore_squeezables ()) |
4664 | break; | |
d012c62b KS |
4665 | } |
4666 | } | |
4667 | #else | |
4668 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4669 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4670 | #endif |
a2960116 | 4671 | |
5f5c8ee5 | 4672 | update_frame_line (f, i); |
4588ec20 | 4673 | } |
4588ec20 | 4674 | } |
177c0ea7 | 4675 | |
27786b2f | 4676 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4677 | |
4678 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4679 | if (!pause_p) |
4588ec20 | 4680 | { |
48cf7030 | 4681 | if ((cursor_in_echo_area |
5f5c8ee5 | 4682 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4683 | show the cursor for the message instead of for the |
5f5c8ee5 | 4684 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4685 | || (EQ (minibuf_window, selected_window) |
4686 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4687 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4688 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4689 | the active mini-buffer window. */ |
2577053b | 4690 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4691 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4692 | { |
7df02016 | 4693 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4694 | int row, col; |
4695 | ||
4696 | if (cursor_in_echo_area < 0) | |
4697 | { | |
5f5c8ee5 GM |
4698 | /* Negative value of cursor_in_echo_area means put |
4699 | cursor at beginning of line. */ | |
648fa17d JB |
4700 | row = top; |
4701 | col = 0; | |
4702 | } | |
1113d9db | 4703 | else |
648fa17d | 4704 | { |
5f5c8ee5 GM |
4705 | /* Positive value of cursor_in_echo_area means put |
4706 | cursor at the end of the prompt. If the mini-buffer | |
4707 | is several lines high, find the last line that has | |
4708 | any text on it. */ | |
7df02016 | 4709 | row = FRAME_LINES (f); |
177c0ea7 | 4710 | do |
648fa17d | 4711 | { |
5f5c8ee5 GM |
4712 | --row; |
4713 | col = 0; | |
177c0ea7 | 4714 | |
5f5c8ee5 GM |
4715 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4716 | { | |
4717 | /* Frame rows are filled up with spaces that | |
4718 | must be ignored here. */ | |
5f5c8ee5 GM |
4719 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4720 | row); | |
4721 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4722 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4723 | ||
4724 | while (last > start | |
4725 | && (last - 1)->charpos < 0) | |
4726 | --last; | |
177c0ea7 | 4727 | |
5f5c8ee5 GM |
4728 | col = last - start; |
4729 | } | |
648fa17d JB |
4730 | } |
4731 | while (row > top && col == 0); | |
4732 | ||
6395da5c | 4733 | /* Make sure COL is not out of range. */ |
868e640e | 4734 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4735 | { |
6395da5c | 4736 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4737 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4738 | { |
7df02016 | 4739 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4740 | row++; |
4741 | } | |
4742 | /* Otherwise move it back in range. */ | |
4743 | else | |
868e640e | 4744 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4745 | } |
4746 | } | |
4747 | ||
385ed61f | 4748 | cursor_to (f, row, col); |
1113d9db | 4749 | } |
4588ec20 | 4750 | else |
5f5c8ee5 GM |
4751 | { |
4752 | /* We have only one cursor on terminal frames. Use it to | |
4753 | display the cursor of the selected window. */ | |
4754 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4755 | if (w->cursor.vpos >= 0 |
4756 | /* The cursor vpos may be temporarily out of bounds | |
4757 | in the following situation: There is one window, | |
4758 | with the cursor in the lower half of it. The window | |
4759 | is split, and a message causes a redisplay before | |
4760 | a new cursor position has been computed. */ | |
7df02016 | 4761 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4762 | { |
4763 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4764 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4765 | ||
7df02016 KS |
4766 | if (INTEGERP (w->left_margin_cols)) |
4767 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4768 | |
7df02016 | 4769 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4770 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4771 | } |
4772 | } | |
4588ec20 JB |
4773 | } |
4774 | ||
ef1b0ba7 | 4775 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4776 | do_pause: |
ef1b0ba7 | 4777 | #endif |
4588ec20 | 4778 | |
5f5c8ee5 | 4779 | clear_desired_matrices (f); |
27786b2f | 4780 | return pause_p; |
4588ec20 JB |
4781 | } |
4782 | ||
4588ec20 | 4783 | |
5f5c8ee5 | 4784 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4785 | |
5bf46f05 | 4786 | static int |
971de7fb | 4787 | scrolling (struct frame *frame) |
4588ec20 JB |
4788 | { |
4789 | int unchanged_at_top, unchanged_at_bottom; | |
4790 | int window_size; | |
4791 | int changed_lines; | |
7df02016 KS |
4792 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4793 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4794 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4795 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4796 | register int i; |
7df02016 | 4797 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4798 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4799 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4800 | |
5f5c8ee5 GM |
4801 | if (!current_matrix) |
4802 | abort (); | |
4588ec20 | 4803 | |
5f5c8ee5 GM |
4804 | /* Compute hash codes of all the lines. Also calculate number of |
4805 | changed lines, number of unchanged lines at the beginning, and | |
4806 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4807 | changed_lines = 0; |
4808 | unchanged_at_top = 0; | |
7df02016 KS |
4809 | unchanged_at_bottom = FRAME_LINES (frame); |
4810 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4811 | { |
4812 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4813 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4814 | return 0; |
5f5c8ee5 GM |
4815 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4816 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4817 | { |
4818 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4819 | new_hash[i] = old_hash[i]; | |
4820 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4821 | draw_cost[i] = INFINITY; | |
4822 | } | |
4588ec20 | 4823 | else |
f188b3c4 | 4824 | { |
5f5c8ee5 GM |
4825 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4826 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4827 | } |
4588ec20 JB |
4828 | |
4829 | if (old_hash[i] != new_hash[i]) | |
4830 | { | |
4831 | changed_lines++; | |
7df02016 | 4832 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4833 | } |
4834 | else if (i == unchanged_at_top) | |
4835 | unchanged_at_top++; | |
5f5c8ee5 | 4836 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4837 | } |
4838 | ||
4839 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4840 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4841 | && changed_lines < baud_rate / 2400) |
7df02016 | 4842 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4843 | return 1; |
4844 | ||
7df02016 | 4845 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4846 | - unchanged_at_bottom); |
4847 | ||
daf01701 | 4848 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4849 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4850 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4851 | free_at_end_vpos = -1; |
4852 | ||
4853 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4854 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4855 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4856 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4857 | && (window_size >= |
4858 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4859 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4860 | old_hash, new_hash, draw_cost))) |
4861 | return 0; | |
4862 | ||
5f5c8ee5 GM |
4863 | if (window_size < 2) |
4864 | return 0; | |
4865 | ||
502b9b64 | 4866 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4867 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4868 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4869 | old_hash + unchanged_at_top - 1, |
4870 | new_hash + unchanged_at_top - 1, | |
4871 | free_at_end_vpos - unchanged_at_top); | |
4872 | ||
4873 | return 0; | |
4874 | } | |
4588ec20 | 4875 | |
4588ec20 | 4876 | |
5f5c8ee5 GM |
4877 | /* Count the number of blanks at the start of the vector of glyphs R |
4878 | which is LEN glyphs long. */ | |
4588ec20 | 4879 | |
4588ec20 | 4880 | static int |
971de7fb | 4881 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4882 | { |
5f5c8ee5 | 4883 | int i; |
177c0ea7 | 4884 | |
5f5c8ee5 GM |
4885 | for (i = 0; i < len; ++i) |
4886 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4887 | break; | |
4888 | ||
4889 | return i; | |
4588ec20 JB |
4890 | } |
4891 | ||
5f5c8ee5 GM |
4892 | |
4893 | /* Count the number of glyphs in common at the start of the glyph | |
4894 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4895 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4896 | ||
4588ec20 | 4897 | static int |
971de7fb | 4898 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4899 | { |
5f5c8ee5 GM |
4900 | struct glyph *p1 = str1; |
4901 | struct glyph *p2 = str2; | |
177c0ea7 | 4902 | |
5f5c8ee5 GM |
4903 | while (p1 < end1 |
4904 | && p2 < end2 | |
42186983 | 4905 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4906 | ++p1, ++p2; |
177c0ea7 | 4907 | |
5f5c8ee5 | 4908 | return p1 - str1; |
4588ec20 JB |
4909 | } |
4910 | ||
5f5c8ee5 | 4911 | |
4588ec20 | 4912 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4913 | |
7df02016 | 4914 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))]) |
4588ec20 | 4915 | |
5f5c8ee5 GM |
4916 | |
4917 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4918 | ||
4588ec20 | 4919 | static void |
971de7fb | 4920 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4921 | { |
5f5c8ee5 | 4922 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4923 | int tem; |
4924 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4925 | struct glyph_matrix *current_matrix = f->current_matrix; |
4926 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4927 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4928 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4929 | int must_write_whole_line_p; | |
daf01701 | 4930 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4931 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4932 | != FACE_TTY_DEFAULT_BG_COLOR); |
4933 | ||
4934 | if (colored_spaces_p) | |
4935 | write_spaces_p = 1; | |
5f5c8ee5 | 4936 | |
26c63686 GM |
4937 | /* Current row not enabled means it has unknown contents. We must |
4938 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4939 | must_write_whole_line_p = !current_row->enabled_p; |
4940 | if (must_write_whole_line_p) | |
4588ec20 | 4941 | { |
5f5c8ee5 | 4942 | obody = 0; |
4588ec20 JB |
4943 | olen = 0; |
4944 | } | |
4945 | else | |
4946 | { | |
5f5c8ee5 GM |
4947 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4948 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4949 | |
4cecaab8 MB |
4950 | /* Ignore trailing spaces, if we can. */ |
4951 | if (!write_spaces_p) | |
4952 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4953 | olen--; | |
4588ec20 JB |
4954 | } |
4955 | ||
5f5c8ee5 GM |
4956 | current_row->enabled_p = 1; |
4957 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 4958 | |
5f5c8ee5 GM |
4959 | /* If desired line is empty, just clear the line. */ |
4960 | if (!desired_row->enabled_p) | |
4588ec20 JB |
4961 | { |
4962 | nlen = 0; | |
4963 | goto just_erase; | |
4964 | } | |
4965 | ||
5f5c8ee5 GM |
4966 | nbody = desired_row->glyphs[TEXT_AREA]; |
4967 | nlen = desired_row->used[TEXT_AREA]; | |
4968 | nend = nbody + nlen; | |
4969 | ||
4970 | /* If display line has unknown contents, write the whole line. */ | |
4971 | if (must_write_whole_line_p) | |
4972 | { | |
26c63686 | 4973 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 4974 | if (!write_spaces_p) |
74ca462f GM |
4975 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
4976 | --nlen; | |
4977 | ||
26c63686 | 4978 | /* Write the contents of the desired line. */ |
74ca462f | 4979 | if (nlen) |
26c63686 | 4980 | { |
385ed61f KL |
4981 | cursor_to (f, vpos, 0); |
4982 | write_glyphs (f, nbody, nlen); | |
26c63686 | 4983 | } |
177c0ea7 | 4984 | |
26c63686 GM |
4985 | /* Don't call clear_end_of_line if we already wrote the whole |
4986 | line. The cursor will not be at the right margin in that | |
4987 | case but in the line below. */ | |
7df02016 | 4988 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 4989 | { |
385ed61f KL |
4990 | cursor_to (f, vpos, nlen); |
4991 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 4992 | } |
58827478 GM |
4993 | else |
4994 | /* Make sure we are in the right row, otherwise cursor movement | |
4995 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 4996 | cursor_to (f, vpos, 0); |
177c0ea7 | 4997 | |
5f5c8ee5 GM |
4998 | make_current (desired_matrix, current_matrix, vpos); |
4999 | return; | |
5000 | } | |
4588ec20 JB |
5001 | |
5002 | /* Pretend trailing spaces are not there at all, | |
5003 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5004 | if (!write_spaces_p) |
5005 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5006 | nlen--; | |
4588ec20 JB |
5007 | |
5008 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5009 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5010 | { |
5f5c8ee5 | 5011 | int i, j; |
4588ec20 | 5012 | |
5f5c8ee5 GM |
5013 | /* Find the first glyph in desired row that doesn't agree with |
5014 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5015 | for (i = 0; i < nlen; i++) |
5016 | { | |
5f5c8ee5 | 5017 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5018 | { |
5f5c8ee5 GM |
5019 | /* Find the end of the run of different glyphs. */ |
5020 | j = i + 1; | |
5021 | while (j < nlen | |
5022 | && (j >= olen | |
5023 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5024 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5025 | ++j; | |
177c0ea7 JB |
5026 | |
5027 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5028 | cursor_to (f, vpos, i); |
5029 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5030 | i = j - 1; |
4588ec20 JB |
5031 | |
5032 | /* Now find the next non-match. */ | |
5033 | } | |
5034 | } | |
5035 | ||
5036 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5037 | if (olen > nlen) | |
5038 | { | |
385ed61f KL |
5039 | cursor_to (f, vpos, nlen); |
5040 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5041 | } |
5042 | ||
5f5c8ee5 GM |
5043 | /* Make current row = desired row. */ |
5044 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5045 | return; |
5046 | } | |
5047 | ||
5f5c8ee5 GM |
5048 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5049 | characters in a row. */ | |
5050 | ||
4588ec20 JB |
5051 | if (!olen) |
5052 | { | |
5f5c8ee5 GM |
5053 | /* If current line is blank, skip over initial spaces, if |
5054 | possible, and write the rest. */ | |
4cecaab8 | 5055 | if (write_spaces_p) |
5f5c8ee5 GM |
5056 | nsp = 0; |
5057 | else | |
5058 | nsp = count_blanks (nbody, nlen); | |
5059 | ||
4588ec20 JB |
5060 | if (nlen > nsp) |
5061 | { | |
385ed61f KL |
5062 | cursor_to (f, vpos, nsp); |
5063 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5064 | } |
5065 | ||
502b9b64 | 5066 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5067 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5068 | return; |
5069 | } | |
5070 | ||
4588ec20 | 5071 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5072 | osp = count_blanks (obody, olen); |
4cecaab8 | 5073 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5074 | |
5f5c8ee5 GM |
5075 | /* Compute number of matching chars starting with first non-blank. */ |
5076 | begmatch = count_match (obody + osp, obody + olen, | |
5077 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5078 | |
5079 | /* Spaces in new match implicit space past the end of old. */ | |
5080 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5081 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5082 | { |
5083 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5084 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5085 | ++begmatch; | |
4588ec20 JB |
5086 | } |
5087 | ||
5088 | /* Avoid doing insert/delete char | |
5089 | just cause number of leading spaces differs | |
5f5c8ee5 | 5090 | when the following text does not match. */ |
4588ec20 JB |
5091 | if (begmatch == 0 && osp != nsp) |
5092 | osp = nsp = min (osp, nsp); | |
5093 | ||
5094 | /* Find matching characters at end of line */ | |
5095 | op1 = obody + olen; | |
5096 | np1 = nbody + nlen; | |
5097 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5098 | while (op1 > op2 |
5099 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5100 | { |
5101 | op1--; | |
5102 | np1--; | |
5103 | } | |
5104 | endmatch = obody + olen - op1; | |
5105 | ||
4588ec20 JB |
5106 | /* tem gets the distance to insert or delete. |
5107 | endmatch is how many characters we save by doing so. | |
5108 | Is it worth it? */ | |
5109 | ||
5110 | tem = (nlen - nsp) - (olen - osp); | |
5111 | if (endmatch && tem | |
daf01701 | 5112 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5113 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5114 | endmatch = 0; |
5115 | ||
5116 | /* nsp - osp is the distance to insert or delete. | |
5117 | If that is nonzero, begmatch is known to be nonzero also. | |
5118 | begmatch + endmatch is how much we save by doing the ins/del. | |
5119 | Is it worth it? */ | |
5120 | ||
5121 | if (nsp != osp | |
daf01701 | 5122 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5123 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5124 | { |
5125 | begmatch = 0; | |
5126 | endmatch = 0; | |
5127 | osp = nsp = min (osp, nsp); | |
5128 | } | |
5129 | ||
5130 | /* Now go through the line, inserting, writing and | |
5131 | deleting as appropriate. */ | |
5132 | ||
5133 | if (osp > nsp) | |
5134 | { | |
385ed61f KL |
5135 | cursor_to (f, vpos, nsp); |
5136 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5137 | } |
5138 | else if (nsp > osp) | |
5139 | { | |
5140 | /* If going to delete chars later in line | |
5141 | and insert earlier in the line, | |
5142 | must delete first to avoid losing data in the insert */ | |
5143 | if (endmatch && nlen < olen + nsp - osp) | |
5144 | { | |
385ed61f KL |
5145 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5146 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5147 | olen = nlen - (nsp - osp); |
5148 | } | |
385ed61f KL |
5149 | cursor_to (f, vpos, osp); |
5150 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5151 | } |
5152 | olen += nsp - osp; | |
5153 | ||
5154 | tem = nsp + begmatch + endmatch; | |
5155 | if (nlen != tem || olen != tem) | |
5156 | { | |
4588ec20 JB |
5157 | if (!endmatch || nlen == olen) |
5158 | { | |
c363a1d6 GM |
5159 | /* If new text being written reaches right margin, there is |
5160 | no need to do clear-to-eol at the end of this function | |
5161 | (and it would not be safe, since cursor is not going to | |
5162 | be "at the margin" after the text is done). */ | |
7df02016 | 5163 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5164 | olen = 0; |
c363a1d6 GM |
5165 | |
5166 | /* Function write_glyphs is prepared to do nothing | |
5167 | if passed a length <= 0. Check it here to avoid | |
5168 | unnecessary cursor movement. */ | |
5169 | if (nlen - tem > 0) | |
5170 | { | |
385ed61f KL |
5171 | cursor_to (f, vpos, nsp + begmatch); |
5172 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5173 | } |
4588ec20 JB |
5174 | } |
5175 | else if (nlen > olen) | |
5176 | { | |
24e86043 KH |
5177 | /* Here, we used to have the following simple code: |
5178 | ---------------------------------------- | |
5179 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5180 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5181 | ---------------------------------------- | |
5182 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5183 | is a padding glyph. */ | |
5184 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5185 | int del; | |
5f5c8ee5 | 5186 | |
385ed61f | 5187 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5188 | |
5f5c8ee5 | 5189 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5190 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5191 | out--; | |
385ed61f | 5192 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5193 | |
5f5c8ee5 GM |
5194 | /* If we left columns to be overwritten, we must delete them. */ |
5195 | del = olen - tem - out; | |
c363a1d6 | 5196 | if (del > 0) |
385ed61f | 5197 | delete_glyphs (f, del); |
177c0ea7 | 5198 | |
5f5c8ee5 | 5199 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5200 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5201 | olen = nlen; |
5202 | } | |
5203 | else if (olen > nlen) | |
5204 | { | |
385ed61f KL |
5205 | cursor_to (f, vpos, nsp + begmatch); |
5206 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5207 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5208 | olen = nlen; |
5209 | } | |
bd9e3e75 | 5210 | } |
5f5c8ee5 GM |
5211 | |
5212 | just_erase: | |
5213 | /* If any unerased characters remain after the new line, erase them. */ | |
5214 | if (olen > nlen) | |
078b3696 | 5215 | { |
385ed61f KL |
5216 | cursor_to (f, vpos, nlen); |
5217 | clear_end_of_line (f, olen); | |
078b3696 | 5218 | } |
5f5c8ee5 GM |
5219 | |
5220 | /* Exchange contents between current_frame and new_frame. */ | |
5221 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5222 | } |
5f5c8ee5 GM |
5223 | |
5224 | ||
078b3696 | 5225 | \f |
5f5c8ee5 GM |
5226 | /*********************************************************************** |
5227 | X/Y Position -> Buffer Position | |
5228 | ***********************************************************************/ | |
5229 | ||
a1b0a6db | 5230 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5231 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5232 | Return in *POS the position in that object. |
2396cbba EZ |
5233 | Adjust *X and *Y to character positions. |
5234 | Return in *DX and *DY the pixel coordinates of the click, | |
5235 | relative to the top left corner of OBJECT, or relative to | |
5236 | the top left corner of the character glyph at (*X, *Y) | |
5237 | if OBJECT is nil. | |
5238 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5239 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5240 | |
6b61353c | 5241 | Lisp_Object |
971de7fb | 5242 | 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 | 5243 | { |
5f5c8ee5 | 5244 | struct it it; |
707ea971 | 5245 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5246 | struct text_pos startp; |
6b61353c KH |
5247 | Lisp_Object string; |
5248 | struct glyph_row *row; | |
cedd7cd9 KS |
5249 | #ifdef HAVE_WINDOW_SYSTEM |
5250 | struct image *img = 0; | |
5251 | #endif | |
2396cbba | 5252 | int x0, x1, to_x; |
57b3e30b | 5253 | void *itdata = NULL; |
5f5c8ee5 | 5254 | |
707ea971 CY |
5255 | /* We used to set current_buffer directly here, but that does the |
5256 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5257 | Fset_buffer (w->buffer); | |
57b3e30b | 5258 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5259 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5260 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5261 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5262 | start_display (&it, w, startp); | |
177c0ea7 | 5263 | |
9173a8fb | 5264 | x0 = *x; |
2396cbba EZ |
5265 | |
5266 | /* First, move to the beginning of the row corresponding to *Y. We | |
5267 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5268 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5269 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5270 | ||
5271 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5272 | glyph at *X. We add it.first_visible_x because iterator |
5273 | positions include the hscroll. */ | |
2396cbba EZ |
5274 | to_x = x0 + it.first_visible_x; |
5275 | if (it.bidi_it.paragraph_dir == R2L) | |
5276 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5277 | text area. This is because the iterator, even in R2L | |
5278 | paragraphs, delivers glyphs as if they started at the left | |
5279 | margin of the window. (When we actually produce glyphs for | |
5280 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5281 | iterator doesn't know about that.) The following line adjusts | |
5282 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5283 | move_it_* routines use. (The -1 is because in a window whose |
5284 | text-area width is W, the rightmost pixel position is W-1, and | |
5285 | it should be mirrored into zero pixel position.) */ | |
5286 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5287 | ||
5288 | /* Now move horizontally in the row to the glyph under *X. Second | |
5289 | argument is ZV to prevent move_it_in_display_line from matching | |
5290 | based on buffer positions. */ | |
2396cbba | 5291 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5292 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5293 | |
707ea971 | 5294 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5295 | |
6b61353c KH |
5296 | *dx = x0 + it.first_visible_x - it.current_x; |
5297 | *dy = *y - it.current_y; | |
5298 | ||
5299 | string = w->buffer; | |
5300 | if (STRINGP (it.string)) | |
5301 | string = it.string; | |
a1b0a6db | 5302 | *pos = it.current; |
86282aab KH |
5303 | if (it.what == IT_COMPOSITION |
5304 | && it.cmp_it.nchars > 1 | |
5305 | && it.cmp_it.reversed_p) | |
5306 | { | |
5307 | /* The current display element is a grapheme cluster in a | |
5308 | composition. In that case, we need the position of the first | |
5309 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5310 | it.current points to the last character of the cluster, thus | |
5311 | we must move back to the first character of the same | |
5312 | cluster. */ | |
5313 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5314 | if (STRINGP (it.string)) | |
5315 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5316 | else | |
425cc014 EZ |
5317 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5318 | CHARPOS (pos->pos)); | |
86282aab | 5319 | } |
6b61353c KH |
5320 | |
5321 | #ifdef HAVE_WINDOW_SYSTEM | |
5322 | if (it.what == IT_IMAGE) | |
5323 | { | |
6b61353c KH |
5324 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5325 | && !NILP (img->spec)) | |
5326 | *object = img->spec; | |
5327 | } | |
5328 | #endif | |
5329 | ||
b70d98e1 KS |
5330 | if (it.vpos < w->current_matrix->nrows |
5331 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5332 | row->enabled_p)) | |
6b61353c KH |
5333 | { |
5334 | if (it.hpos < row->used[TEXT_AREA]) | |
5335 | { | |
5336 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5337 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5338 | if (img) |
5339 | { | |
5340 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5341 | *dx += glyph->slice.img.x; |
5342 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5343 | /* Image slices positions are still relative to the entire image */ |
5344 | *width = img->width; | |
5345 | *height = img->height; | |
5346 | } | |
5347 | else | |
6b61353c | 5348 | #endif |
cedd7cd9 KS |
5349 | { |
5350 | *width = glyph->pixel_width; | |
5351 | *height = glyph->ascent + glyph->descent; | |
5352 | } | |
6b61353c KH |
5353 | } |
5354 | else | |
5355 | { | |
5356 | *width = 0; | |
5357 | *height = row->height; | |
5358 | } | |
5359 | } | |
5360 | else | |
5361 | { | |
5362 | *width = *height = 0; | |
5363 | } | |
5364 | ||
5365 | /* Add extra (default width) columns if clicked after EOL. */ | |
5366 | x1 = max(0, it.current_x + it.pixel_width - it.first_visible_x); | |
5367 | if (x0 > x1) | |
5368 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5369 | ||
5370 | *x = it.hpos; | |
5371 | *y = it.vpos; | |
5372 | ||
5373 | return string; | |
5f5c8ee5 | 5374 | } |
4588ec20 | 5375 | |
5f5c8ee5 GM |
5376 | |
5377 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5378 | mode line or header line (PART says which) of window W, or nil if none. |
5379 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5380 | |
5381 | Lisp_Object | |
ace1712c EZ |
5382 | mode_line_string (struct window *w, enum window_part part, |
5383 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5384 | int *dx, int *dy, int *width, int *height) | |
5f5c8ee5 GM |
5385 | { |
5386 | struct glyph_row *row; | |
5387 | struct glyph *glyph, *end; | |
6b61353c | 5388 | int x0, y0; |
5f5c8ee5 GM |
5389 | Lisp_Object string = Qnil; |
5390 | ||
641bdbf3 | 5391 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5392 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5393 | else | |
045dee35 | 5394 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5395 | y0 = *y - row->y; |
5396 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5397 | |
5398 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5399 | { |
5f5c8ee5 GM |
5400 | /* Find the glyph under X. If we find one with a string object, |
5401 | it's the one we were looking for. */ | |
5402 | glyph = row->glyphs[TEXT_AREA]; | |
5403 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5404 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5405 | x0 -= glyph->pixel_width; |
5406 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5407 | if (glyph < end) | |
5408 | { | |
5409 | string = glyph->object; | |
5410 | *charpos = glyph->charpos; | |
5411 | *width = glyph->pixel_width; | |
5412 | *height = glyph->ascent + glyph->descent; | |
5413 | #ifdef HAVE_WINDOW_SYSTEM | |
5414 | if (glyph->type == IMAGE_GLYPH) | |
5415 | { | |
5416 | struct image *img; | |
5417 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5418 | if (img != NULL) | |
5419 | *object = img->spec; | |
5420 | y0 -= row->ascent - glyph->ascent; | |
5421 | } | |
5422 | #endif | |
5423 | } | |
5424 | else | |
5425 | { | |
5426 | /* Add extra (default width) columns if clicked after EOL. */ | |
5427 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5428 | *width = 0; | |
5429 | *height = row->height; | |
5430 | } | |
5431 | } | |
5432 | else | |
5433 | { | |
5434 | *x = 0; | |
5435 | x0 = 0; | |
5436 | *width = *height = 0; | |
4588ec20 | 5437 | } |
5f5c8ee5 | 5438 | |
6b61353c KH |
5439 | *dx = x0; |
5440 | *dy = y0; | |
5441 | ||
5f5c8ee5 | 5442 | return string; |
4588ec20 | 5443 | } |
5f5c8ee5 GM |
5444 | |
5445 | ||
db1db309 GM |
5446 | /* Value is the string under window-relative coordinates X/Y in either |
5447 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5448 | the string returned. */ | |
5449 | ||
5450 | Lisp_Object | |
ace1712c EZ |
5451 | marginal_area_string (struct window *w, enum window_part part, |
5452 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5453 | int *dx, int *dy, int *width, int *height) | |
db1db309 GM |
5454 | { |
5455 | struct glyph_row *row = w->current_matrix->rows; | |
5456 | struct glyph *glyph, *end; | |
6b61353c | 5457 | int x0, y0, i, wy = *y; |
641bdbf3 | 5458 | int area; |
db1db309 GM |
5459 | Lisp_Object string = Qnil; |
5460 | ||
641bdbf3 | 5461 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5462 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5463 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5464 | area = RIGHT_MARGIN_AREA; |
5465 | else | |
5466 | abort (); | |
5467 | ||
5468 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5469 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5470 | break; | |
6b61353c KH |
5471 | y0 = *y - row->y; |
5472 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5473 | |
5474 | if (row->enabled_p) | |
5475 | { | |
5476 | /* Find the glyph under X. If we find one with a string object, | |
5477 | it's the one we were looking for. */ | |
db1db309 | 5478 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5479 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5480 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5481 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5482 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5483 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5484 | else |
7df02016 | 5485 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5486 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5487 | : 0); |
5488 | ||
6b61353c KH |
5489 | glyph = row->glyphs[area]; |
5490 | end = glyph + row->used[area]; | |
cfde341f | 5491 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5492 | x0 -= glyph->pixel_width; |
5493 | *x = glyph - row->glyphs[area]; | |
5494 | if (glyph < end) | |
5495 | { | |
5496 | string = glyph->object; | |
5497 | *charpos = glyph->charpos; | |
5498 | *width = glyph->pixel_width; | |
5499 | *height = glyph->ascent + glyph->descent; | |
5500 | #ifdef HAVE_WINDOW_SYSTEM | |
5501 | if (glyph->type == IMAGE_GLYPH) | |
5502 | { | |
5503 | struct image *img; | |
5504 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5505 | if (img != NULL) | |
5506 | *object = img->spec; | |
5507 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5508 | x0 += glyph->slice.img.x; |
5509 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5510 | } |
5511 | #endif | |
5512 | } | |
5513 | else | |
5514 | { | |
5515 | /* Add extra (default width) columns if clicked after EOL. */ | |
5516 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5517 | *width = 0; | |
5518 | *height = row->height; | |
5519 | } | |
db1db309 | 5520 | } |
6b61353c KH |
5521 | else |
5522 | { | |
5523 | x0 = 0; | |
5524 | *x = 0; | |
5525 | *width = *height = 0; | |
5526 | } | |
5527 | ||
5528 | *dx = x0; | |
5529 | *dy = y0; | |
db1db309 GM |
5530 | |
5531 | return string; | |
5532 | } | |
5533 | ||
5534 | ||
5f5c8ee5 GM |
5535 | /*********************************************************************** |
5536 | Changing Frame Sizes | |
5537 | ***********************************************************************/ | |
4588ec20 JB |
5538 | |
5539 | #ifdef SIGWINCH | |
5f5c8ee5 | 5540 | |
9af30bdf | 5541 | static void |
971de7fb DN |
5542 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5543 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5544 | { |
5545 | int width, height; | |
4588ec20 JB |
5546 | int old_errno = errno; |
5547 | ||
28d7d09f | 5548 | struct tty_display_info *tty; |
4d553a13 | 5549 | |
333f1b6f JD |
5550 | signal (SIGWINCH, window_change_signal); |
5551 | SIGNAL_THREAD_CHECK (signalnum); | |
5552 | ||
9628b887 KL |
5553 | /* The frame size change obviously applies to a single |
5554 | termcap-controlled terminal, but we can't decide which. | |
5555 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5556 | */ |
5557 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5558 | |
0a125897 KL |
5559 | if (! tty->term_initted) |
5560 | continue; | |
4588ec20 | 5561 | |
db878925 DN |
5562 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5563 | use it. */ | |
5564 | if (!tty->input) | |
5565 | continue; | |
5566 | ||
0b0d3e0b | 5567 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5568 | |
bedeffcf | 5569 | if (width > 5 && height > 2) { |
9628b887 | 5570 | Lisp_Object tail, frame; |
3fc809e2 | 5571 | |
9628b887 | 5572 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5573 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5574 | /* Record the new sizes, but don't reallocate the data | |
5575 | structures now. Let that be done later outside of the | |
5576 | signal handler. */ | |
5577 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5578 | } |
4588ec20 | 5579 | } |
3fc809e2 | 5580 | |
4588ec20 JB |
5581 | errno = old_errno; |
5582 | } | |
5583 | #endif /* SIGWINCH */ | |
5584 | ||
5585 | ||
b96fd3e8 GM |
5586 | /* Do any change in frame size that was requested by a signal. SAFE |
5587 | non-zero means this function is called from a place where it is | |
5588 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5589 | |
dfcf069d | 5590 | void |
971de7fb | 5591 | do_pending_window_change (int safe) |
4588ec20 JB |
5592 | { |
5593 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5594 | if (redisplaying_p && !safe) |
5595 | return; | |
177c0ea7 | 5596 | |
4588ec20 JB |
5597 | while (delayed_size_change) |
5598 | { | |
35f56f96 | 5599 | Lisp_Object tail, frame; |
4588ec20 JB |
5600 | |
5601 | delayed_size_change = 0; | |
5602 | ||
35f56f96 | 5603 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5604 | { |
5f5c8ee5 | 5605 | struct frame *f = XFRAME (frame); |
35f56f96 | 5606 | |
7df02016 KS |
5607 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5608 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5609 | 0, 0, safe); | |
4588ec20 JB |
5610 | } |
5611 | } | |
5612 | } | |
5613 | ||
5614 | ||
502b9b64 | 5615 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5616 | indicate no change is to take place. |
4588ec20 | 5617 | |
b6a65ac2 JB |
5618 | If DELAY is non-zero, then assume we're being called from a signal |
5619 | handler, and queue the change for later - perhaps the next | |
5620 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5621 | from a signal handler. |
5622 | ||
5623 | SAFE non-zero means this function is called from a place where it's | |
5624 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5625 | |
dfcf069d | 5626 | void |
971de7fb | 5627 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5628 | { |
5629 | Lisp_Object tail, frame; | |
3826ea1a | 5630 | |
9628b887 | 5631 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5632 | { |
9628b887 KL |
5633 | /* On MS-DOS, all frames use the same screen, so a change in |
5634 | size affects all frames. Termcap now supports multiple | |
5635 | ttys. */ | |
45140e01 | 5636 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5637 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5638 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5639 | pretend, delay, safe); |
45140e01 RS |
5640 | } |
5641 | else | |
b96fd3e8 | 5642 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5643 | } |
5644 | ||
5645 | static void | |
971de7fb | 5646 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5647 | { |
7df02016 | 5648 | int new_frame_total_cols; |
aed13378 | 5649 | int count = SPECPDL_INDEX (); |
3826ea1a | 5650 | |
4588ec20 | 5651 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5652 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5653 | { |
7df02016 KS |
5654 | f->new_text_lines = newheight; |
5655 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5656 | delayed_size_change = 1; |
5657 | return; | |
5658 | } | |
5659 | ||
502b9b64 | 5660 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5661 | f->new_text_lines = 0; |
5662 | f->new_text_cols = 0; | |
b6a65ac2 | 5663 | |
08f7aa3e | 5664 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5665 | if (newheight == 0) |
7df02016 | 5666 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5667 | if (newwidth == 0) |
7df02016 | 5668 | newwidth = FRAME_COLS (f); |
3826ea1a | 5669 | |
5f5c8ee5 GM |
5670 | /* Compute width of windows in F. |
5671 | This is the width of the frame without vertical scroll bars. */ | |
7df02016 | 5672 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); |
3826ea1a | 5673 | |
b6a65ac2 | 5674 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5675 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 JB |
5676 | |
5677 | /* If we're not changing the frame size, quit now. */ | |
5075d853 JD |
5678 | /* Frame width may be unchanged but the text portion may change, for example, |
5679 | fullscreen and remove/add scroll bar. */ | |
7df02016 | 5680 | if (newheight == FRAME_LINES (f) |
5075d853 JD |
5681 | && newwidth == FRAME_COLS (f) // text portion unchanged |
5682 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) // frame width unchanged | |
4588ec20 JB |
5683 | return; |
5684 | ||
cbb95688 RS |
5685 | BLOCK_INPUT; |
5686 | ||
886a8a6c KH |
5687 | #ifdef MSDOS |
5688 | /* We only can set screen dimensions to certain values supported | |
5689 | by our video hardware. Try to find the smallest size greater | |
5690 | or equal to the requested dimensions. */ | |
5691 | dos_set_window_size (&newheight, &newwidth); | |
5692 | #endif | |
5693 | ||
7df02016 | 5694 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5695 | { |
562dd5e9 | 5696 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5697 | |
48e482e6 EZ |
5698 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5699 | manipulating video hardware. */ | |
5700 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5701 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5702 | } |
5703 | ||
7df02016 | 5704 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5705 | { |
562dd5e9 | 5706 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5707 | |
48e482e6 EZ |
5708 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5709 | manipulating video hardware. */ | |
5710 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5711 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5712 | |
9ea173e8 | 5713 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5714 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5715 | } |
5716 | ||
7df02016 KS |
5717 | FRAME_LINES (f) = newheight; |
5718 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5719 | |
5f5c8ee5 GM |
5720 | { |
5721 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5722 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5723 | |
5f5c8ee5 GM |
5724 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5725 | &text_area_height); | |
5726 | if (w->cursor.x >= text_area_x + text_area_width) | |
5727 | w->cursor.hpos = w->cursor.x = 0; | |
5728 | if (w->cursor.y >= text_area_y + text_area_height) | |
5729 | w->cursor.vpos = w->cursor.y = 0; | |
5730 | } | |
986e61b8 | 5731 | |
5f5c8ee5 | 5732 | adjust_glyphs (f); |
5f5c8ee5 | 5733 | calculate_costs (f); |
cb02fa39 GM |
5734 | SET_FRAME_GARBAGED (f); |
5735 | f->resized_p = 1; | |
97cf50e7 RS |
5736 | |
5737 | UNBLOCK_INPUT; | |
61730a69 | 5738 | |
e523f7e5 RS |
5739 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5740 | ||
ef264c42 | 5741 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5742 | |
5743 | unbind_to (count, Qnil); | |
4588ec20 | 5744 | } |
5f5c8ee5 GM |
5745 | |
5746 | ||
4588ec20 | 5747 | \f |
5f5c8ee5 GM |
5748 | /*********************************************************************** |
5749 | Terminal Related Lisp Functions | |
5750 | ***********************************************************************/ | |
5751 | ||
5752 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5753 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5754 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5755 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5756 | (Lisp_Object file) |
5f5c8ee5 | 5757 | { |
0b0d3e0b KL |
5758 | struct tty_display_info *tty; |
5759 | ||
7d2f1216 EZ |
5760 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5761 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5762 | error ("Current frame is not on a tty device"); |
5763 | ||
5764 | tty = CURTTY (); | |
5765 | ||
5766 | if (tty->termscript != 0) | |
e18c7093 KL |
5767 | { |
5768 | BLOCK_INPUT; | |
0b0d3e0b | 5769 | fclose (tty->termscript); |
e18c7093 KL |
5770 | UNBLOCK_INPUT; |
5771 | } | |
0b0d3e0b | 5772 | tty->termscript = 0; |
5f5c8ee5 GM |
5773 | |
5774 | if (! NILP (file)) | |
5775 | { | |
5776 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5777 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5778 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5779 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5780 | } | |
5781 | return Qnil; | |
5782 | } | |
5783 | ||
5784 | ||
4588ec20 | 5785 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5786 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5787 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5788 | Control characters in STRING will have terminal-dependent effects. |
5789 | ||
6ed8eeff | 5790 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5791 | It may be a terminal object, a frame, or nil for the terminal used by |
5792 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5793 | when TERMINAL is nil. */) | |
5842a27b | 5794 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5795 | { |
7cef7ce3 SM |
5796 | struct terminal *t = get_terminal (terminal, 1); |
5797 | FILE *out; | |
0b0d3e0b | 5798 | |
94f3db62 | 5799 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5800 | CHECK_STRING (string); |
2c1e4409 | 5801 | BLOCK_INPUT; |
0b0d3e0b | 5802 | |
6ed8eeff KL |
5803 | if (!t) |
5804 | error ("Unknown terminal device"); | |
0b0d3e0b | 5805 | |
7cef7ce3 SM |
5806 | if (t->type == output_initial) |
5807 | out = stdout; | |
5808 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5809 | error ("Device %d is not a termcap terminal device", t->id); | |
5810 | else | |
5811 | { | |
5812 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5813 | |
7cef7ce3 SM |
5814 | if (! tty->output) |
5815 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5816 | |
7cef7ce3 SM |
5817 | if (tty->termscript) |
5818 | { | |
5819 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5820 | fflush (tty->termscript); | |
5821 | } | |
5822 | out = tty->output; | |
4588ec20 | 5823 | } |
7cef7ce3 SM |
5824 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5825 | fflush (out); | |
2c1e4409 | 5826 | UNBLOCK_INPUT; |
4588ec20 JB |
5827 | return Qnil; |
5828 | } | |
5829 | ||
5f5c8ee5 | 5830 | |
a7ca3326 | 5831 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5832 | doc: /* Beep, or flash the screen. |
228299fa | 5833 | Also, unless an argument is given, |
7ee72033 | 5834 | terminate any keyboard macro currently executing. */) |
5842a27b | 5835 | (Lisp_Object arg) |
4588ec20 | 5836 | { |
efb859b4 | 5837 | if (!NILP (arg)) |
4588ec20 | 5838 | { |
7fa788da RS |
5839 | if (noninteractive) |
5840 | putchar (07); | |
5841 | else | |
385ed61f | 5842 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5843 | } |
5844 | else | |
5845 | bitch_at_user (); | |
5846 | ||
5847 | return Qnil; | |
5848 | } | |
5849 | ||
dfcf069d | 5850 | void |
971de7fb | 5851 | bitch_at_user (void) |
4588ec20 JB |
5852 | { |
5853 | if (noninteractive) | |
5854 | putchar (07); | |
5f5c8ee5 | 5855 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5856 | error ("Keyboard macro terminated by a command ringing the bell"); |
5857 | else | |
385ed61f | 5858 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5859 | } |
5860 | ||
5f5c8ee5 GM |
5861 | |
5862 | \f | |
5863 | /*********************************************************************** | |
5864 | Sleeping, Waiting | |
5865 | ***********************************************************************/ | |
5866 | ||
a7ca3326 | 5867 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5868 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5869 | SECONDS may be a floating-point value, meaning that you can wait for a |
5870 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5871 | additional wait period, in milliseconds; this may be useful if your | |
5872 | Emacs was built without floating point support. | |
7ee72033 | 5873 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5874 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5875 | { |
767229f8 | 5876 | int sec, usec; |
4588ec20 | 5877 | |
767229f8 | 5878 | if (NILP (milliseconds)) |
e9c9a718 | 5879 | XSETINT (milliseconds, 0); |
767229f8 | 5880 | else |
b7826503 | 5881 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
5882 | usec = XINT (milliseconds) * 1000; |
5883 | ||
b07646f5 JB |
5884 | { |
5885 | double duration = extract_float (seconds); | |
5886 | sec = (int) duration; | |
5887 | usec += (duration - sec) * 1000000; | |
5888 | } | |
4588ec20 | 5889 | |
a41f8bed | 5890 | #ifndef EMACS_HAS_USECS |
767229f8 | 5891 | if (sec == 0 && usec != 0) |
861e19b9 | 5892 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 5893 | #endif |
767229f8 JB |
5894 | |
5895 | /* Assure that 0 <= usec < 1000000. */ | |
5896 | if (usec < 0) | |
5897 | { | |
153a073c | 5898 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
5899 | if (-1000000 < usec) |
5900 | sec--, usec += 1000000; | |
5901 | else | |
5902 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 5903 | } |
767229f8 JB |
5904 | else |
5905 | sec += usec / 1000000, usec %= 1000000; | |
5906 | ||
6b5153b1 | 5907 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 5908 | return Qnil; |
4588ec20 | 5909 | |
dcd1ca45 | 5910 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
5911 | |
5912 | return Qnil; | |
5913 | } | |
5914 | ||
5f5c8ee5 | 5915 | |
dcd1ca45 | 5916 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5917 | it does redisplay. |
f76475ad | 5918 | |
2bcac766 CY |
5919 | TIMEOUT is number of seconds to wait (float or integer), |
5920 | or t to wait forever. | |
902b9b6d KS |
5921 | READING is 1 if reading input. |
5922 | If DO_DISPLAY is >0 display process output while waiting. | |
5923 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5924 | */ | |
4588ec20 | 5925 | |
f76475ad | 5926 | Lisp_Object |
971de7fb | 5927 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 5928 | { |
902b9b6d | 5929 | int sec, usec; |
f222369e | 5930 | |
902b9b6d | 5931 | swallow_events (do_display); |
ccddf474 | 5932 | |
902b9b6d | 5933 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5934 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5935 | return Qnil; |
4588ec20 | 5936 | |
902b9b6d KS |
5937 | if (do_display >= 2) |
5938 | redisplay_preserve_echo_area (2); | |
5939 | ||
8e09f23f | 5940 | if (INTEGERP (timeout)) |
f222369e | 5941 | { |
7ff14773 | 5942 | sec = XINT (timeout); |
8e09f23f | 5943 | usec = 0; |
f222369e | 5944 | } |
8e09f23f KS |
5945 | else if (FLOATP (timeout)) |
5946 | { | |
99a20368 | 5947 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
5948 | sec = (int) seconds; |
5949 | usec = (int) ((seconds - sec) * 1000000); | |
5950 | } | |
2bcac766 CY |
5951 | else if (EQ (timeout, Qt)) |
5952 | { | |
5953 | sec = 0; | |
5954 | usec = 0; | |
5955 | } | |
902b9b6d | 5956 | else |
8e09f23f | 5957 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 5958 | |
2bcac766 | 5959 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
5960 | return Qt; |
5961 | ||
4588ec20 | 5962 | #ifdef SIGIO |
8fc798e9 | 5963 | gobble_input (0); |
f76475ad JB |
5964 | #endif |
5965 | ||
902b9b6d | 5966 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 5967 | Qnil, NULL, 0); |
f76475ad | 5968 | |
4588ec20 JB |
5969 | return detect_input_pending () ? Qnil : Qt; |
5970 | } | |
5971 | ||
5f5c8ee5 | 5972 | |
a7ca3326 | 5973 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
01327edf | 5974 | doc: /* Perform redisplay if no input is available. |
a5c2c707 | 5975 | If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil, |
03240971 KS |
5976 | perform a full redisplay even if input is available. |
5977 | Return t if redisplay was performed, nil otherwise. */) | |
5842a27b | 5978 | (Lisp_Object force) |
f76475ad | 5979 | { |
01327edf | 5980 | int count; |
659d9874 | 5981 | |
902b9b6d KS |
5982 | swallow_events (1); |
5983 | if ((detect_input_pending_run_timers (1) | |
01327edf | 5984 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
5985 | || !NILP (Vexecuting_kbd_macro)) |
5986 | return Qnil; | |
f76475ad | 5987 | |
01327edf KS |
5988 | count = SPECPDL_INDEX (); |
5989 | if (!NILP (force) && !redisplay_dont_pause) | |
5990 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 5991 | redisplay_preserve_echo_area (2); |
01327edf | 5992 | unbind_to (count, Qnil); |
7ba07a1a | 5993 | return Qt; |
f76475ad | 5994 | } |
5f5c8ee5 GM |
5995 | |
5996 | ||
5997 | \f | |
5998 | /*********************************************************************** | |
5999 | Other Lisp Functions | |
6000 | ***********************************************************************/ | |
6001 | ||
6002 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6003 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6004 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6005 | |
6006 | static Lisp_Object frame_and_buffer_state; | |
6007 | ||
6008 | ||
6009 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6010 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6011 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6012 | VARIABLE is a variable name whose value is either nil or a state vector |
6013 | that will be updated to contain all frames and buffers, | |
228299fa | 6014 | aside from buffers whose names start with space, |
44edd521 RS |
6015 | along with the buffers' read-only and modified flags. This allows a fast |
6016 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6017 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6018 | the current state. |
6019 | ||
6020 | If VARIABLE is nil, an internal variable is used. Users should not | |
6021 | pass nil for VARIABLE. */) | |
5842a27b | 6022 | (Lisp_Object variable) |
5f5c8ee5 | 6023 | { |
44edd521 RS |
6024 | Lisp_Object state, tail, frame, buf; |
6025 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6026 | int n; |
6027 | ||
44edd521 RS |
6028 | if (! NILP (variable)) |
6029 | { | |
6030 | CHECK_SYMBOL (variable); | |
6031 | state = Fsymbol_value (variable); | |
6032 | if (! VECTORP (state)) | |
6033 | goto changed; | |
6034 | } | |
6035 | else | |
6036 | state = frame_and_buffer_state; | |
6037 | ||
6038 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6039 | end = vecp + ASIZE (state); |
44edd521 | 6040 | |
5f5c8ee5 GM |
6041 | FOR_EACH_FRAME (tail, frame) |
6042 | { | |
44edd521 RS |
6043 | if (vecp == end) |
6044 | goto changed; | |
5f5c8ee5 GM |
6045 | if (!EQ (*vecp++, frame)) |
6046 | goto changed; | |
44edd521 RS |
6047 | if (vecp == end) |
6048 | goto changed; | |
5f5c8ee5 GM |
6049 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6050 | goto changed; | |
6051 | } | |
44edd521 | 6052 | /* Check that the buffer info matches. */ |
7539e11f | 6053 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6054 | { |
7539e11f | 6055 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6056 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6057 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6058 | continue; |
44edd521 RS |
6059 | if (vecp == end) |
6060 | goto changed; | |
5f5c8ee5 GM |
6061 | if (!EQ (*vecp++, buf)) |
6062 | goto changed; | |
44edd521 RS |
6063 | if (vecp == end) |
6064 | goto changed; | |
4b4deea2 | 6065 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6066 | goto changed; |
44edd521 RS |
6067 | if (vecp == end) |
6068 | goto changed; | |
5f5c8ee5 GM |
6069 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6070 | goto changed; | |
6071 | } | |
44edd521 RS |
6072 | if (vecp == end) |
6073 | goto changed; | |
5f5c8ee5 GM |
6074 | /* Detect deletion of a buffer at the end of the list. */ |
6075 | if (EQ (*vecp, Qlambda)) | |
6076 | return Qnil; | |
44edd521 RS |
6077 | |
6078 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6079 | changed: |
44edd521 RS |
6080 | /* Count the size we will need. |
6081 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6082 | n = 1; |
6083 | FOR_EACH_FRAME (tail, frame) | |
6084 | n += 2; | |
7539e11f | 6085 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6086 | n += 3; |
44edd521 RS |
6087 | /* Reallocate the vector if data has grown to need it, |
6088 | or if it has shrunk a lot. */ | |
6089 | if (! VECTORP (state) | |
77b37c05 PE |
6090 | || n > ASIZE (state) |
6091 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6092 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6093 | { |
6094 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6095 | if (! NILP (variable)) | |
6096 | Fset (variable, state); | |
6097 | else | |
6098 | frame_and_buffer_state = state; | |
6099 | } | |
6100 | ||
6101 | /* Record the new data in the (possibly reallocated) vector. */ | |
6102 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6103 | FOR_EACH_FRAME (tail, frame) |
6104 | { | |
6105 | *vecp++ = frame; | |
6106 | *vecp++ = XFRAME (frame)->name; | |
6107 | } | |
7539e11f | 6108 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6109 | { |
7539e11f | 6110 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6111 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6112 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6113 | continue; |
6114 | *vecp++ = buf; | |
4b4deea2 | 6115 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6116 | *vecp++ = Fbuffer_modified_p (buf); |
6117 | } | |
6118 | /* Fill up the vector with lambdas (always at least one). */ | |
6119 | *vecp++ = Qlambda; | |
44edd521 | 6120 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6121 | < ASIZE (state)) |
5f5c8ee5 GM |
6122 | *vecp++ = Qlambda; |
6123 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6124 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6125 | > ASIZE (state)) |
5f5c8ee5 GM |
6126 | abort (); |
6127 | return Qt; | |
6128 | } | |
6129 | ||
6130 | ||
4588ec20 | 6131 | \f |
5f5c8ee5 GM |
6132 | /*********************************************************************** |
6133 | Initialization | |
6134 | ***********************************************************************/ | |
6135 | ||
5f5c8ee5 GM |
6136 | /* Initialization done when Emacs fork is started, before doing stty. |
6137 | Determine terminal type and set terminal_driver. Then invoke its | |
6138 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6139 | |
dfcf069d | 6140 | void |
971de7fb | 6141 | init_display (void) |
4588ec20 | 6142 | { |
28d440ab KL |
6143 | char *terminal_type; |
6144 | ||
5f5c8ee5 GM |
6145 | /* Construct the space glyph. */ |
6146 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6147 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6148 | space_glyph.charpos = -1; |
6149 | ||
4588ec20 JB |
6150 | inverse_video = 0; |
6151 | cursor_in_echo_area = 0; | |
6152 | terminal_type = (char *) 0; | |
6153 | ||
1315c181 JB |
6154 | /* Now is the time to initialize this; it's used by init_sys_modes |
6155 | during startup. */ | |
2246281f | 6156 | Vinitial_window_system = Qnil; |
4588ec20 | 6157 | |
4181ad9c KL |
6158 | /* SIGWINCH needs to be handled no matter what display we start |
6159 | with. Otherwise newly opened tty frames will not resize | |
6160 | automatically. */ | |
6161 | #ifdef SIGWINCH | |
6162 | #ifndef CANNOT_DUMP | |
6163 | if (initialized) | |
6164 | #endif /* CANNOT_DUMP */ | |
6165 | signal (SIGWINCH, window_change_signal); | |
6166 | #endif /* SIGWINCH */ | |
4588ec20 | 6167 | |
d6ef42b9 | 6168 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6169 | if (IS_DAEMON) |
6170 | return; | |
d6ef42b9 | 6171 | |
1315c181 JB |
6172 | /* If the user wants to use a window system, we shouldn't bother |
6173 | initializing the terminal. This is especially important when the | |
6174 | terminal is so dumb that emacs gives up before and doesn't bother | |
6175 | using the window system. | |
4588ec20 | 6176 | |
36bbad1d KH |
6177 | If the DISPLAY environment variable is set and nonempty, |
6178 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6179 | |
6180 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6181 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6182 | { |
36bbad1d | 6183 | char *display; |
36bbad1d | 6184 | display = getenv ("DISPLAY"); |
36bbad1d | 6185 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6186 | |
6187 | if (display_arg && !x_display_ok (display)) | |
6188 | { | |
6189 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6190 | display); | |
6191 | inhibit_window_system = 1; | |
6192 | } | |
f040093a | 6193 | } |
d460af17 | 6194 | |
4fcc2638 | 6195 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6196 | { |
111d9af3 | 6197 | Vinitial_window_system = Qx; |
4588ec20 JB |
6198 | #ifdef HAVE_X11 |
6199 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6200 | #endif |
8a2a6032 | 6201 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6202 | /* In some versions of ncurses, |
6a428f77 | 6203 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6204 | So call tgetent. */ |
6205 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6206 | #endif |
5f5c8ee5 | 6207 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6208 | return; |
6209 | } | |
6210 | #endif /* HAVE_X_WINDOWS */ | |
6211 | ||
fd2e066a | 6212 | #ifdef HAVE_NTGUI |
177c0ea7 | 6213 | if (!inhibit_window_system) |
fd2e066a | 6214 | { |
111d9af3 | 6215 | Vinitial_window_system = Qw32; |
fd2e066a | 6216 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6217 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6218 | return; |
6219 | } | |
6220 | #endif /* HAVE_NTGUI */ | |
6221 | ||
edfda783 AR |
6222 | #ifdef HAVE_NS |
6223 | if (!inhibit_window_system | |
6224 | #ifndef CANNOT_DUMP | |
6225 | && initialized | |
6226 | #endif | |
6227 | ) | |
6228 | { | |
111d9af3 | 6229 | Vinitial_window_system = Qns; |
edfda783 AR |
6230 | Vwindow_system_version = make_number(10); |
6231 | adjust_frame_glyphs_initially (); | |
6232 | return; | |
6233 | } | |
6234 | #endif | |
6235 | ||
4588ec20 JB |
6236 | /* If no window system has been specified, try to use the terminal. */ |
6237 | if (! isatty (0)) | |
6238 | { | |
1559a86d | 6239 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6240 | exit (1); |
6241 | } | |
6242 | ||
6152361f JR |
6243 | #ifdef WINDOWSNT |
6244 | terminal_type = "w32console"; | |
6245 | #else | |
153a073c | 6246 | /* Look at the TERM variable. */ |
4588ec20 | 6247 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6248 | #endif |
4588ec20 JB |
6249 | if (!terminal_type) |
6250 | { | |
5d12ff0b | 6251 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6252 | if (! inhibit_window_system) |
6253 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6254 | else |
6255 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6256 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6257 | exit (1); |
6258 | } | |
6259 | ||
0a125897 | 6260 | { |
6ed8eeff | 6261 | struct terminal *t; |
3224dac1 KL |
6262 | struct frame *f = XFRAME (selected_frame); |
6263 | ||
6264 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6265 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6266 | |
6267 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6268 | if (f->output_method != output_initial) |
3224dac1 | 6269 | abort (); |
6ed8eeff KL |
6270 | f->output_method = t->type; |
6271 | f->terminal = t; | |
3224dac1 | 6272 | |
6ed8eeff | 6273 | t->reference_count++; |
7ac5dac9 EZ |
6274 | #ifdef MSDOS |
6275 | f->output_data.tty->display_info = &the_only_display_info; | |
6276 | #else | |
6277 | if (f->output_method == output_termcap) | |
6278 | create_tty_output (f); | |
6279 | #endif | |
6ed8eeff | 6280 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6281 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6282 | FrameRows (t->display_info.tty), |
6283 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6284 | |
6ed8eeff KL |
6285 | /* Delete the initial terminal. */ |
6286 | if (--initial_terminal->reference_count == 0 | |
6287 | && initial_terminal->delete_terminal_hook) | |
6288 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6289 | |
6290 | /* Update frame parameters to reflect the new type. */ | |
6291 | Fmodify_frame_parameters | |
6292 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6293 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6294 | if (t->display_info.tty->name) |
6295 | Fmodify_frame_parameters (selected_frame, | |
6296 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6297 | Qnil)); | |
6298 | else | |
6299 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6300 | Qnil)); | |
0a125897 | 6301 | } |
3fc809e2 | 6302 | |
d86c299a | 6303 | { |
91fb7e1b | 6304 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6305 | int width = FRAME_TOTAL_COLS (sf); |
6306 | int height = FRAME_LINES (sf); | |
d86c299a | 6307 | |
5f5c8ee5 | 6308 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6309 | change. It's not clear what better we could do. The rest of |
6310 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6311 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6312 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6313 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6314 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6315 | < (width + 2) * height)) | |
1559a86d | 6316 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6317 | } |
6318 | ||
5f5c8ee5 | 6319 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6320 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6321 | |
5f5c8ee5 GM |
6322 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6323 | if (initialized | |
6324 | && !noninteractive | |
2246281f | 6325 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6326 | { |
6327 | /* For the initial frame, we don't have any way of knowing what | |
6328 | are the foreground and background colors of the terminal. */ | |
6329 | struct frame *sf = SELECTED_FRAME(); | |
6330 | ||
f9d2fdc4 EZ |
6331 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6332 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6333 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6334 | } | |
5f5c8ee5 GM |
6335 | } |
6336 | ||
6337 | ||
6338 | \f | |
6339 | /*********************************************************************** | |
6340 | Blinking cursor | |
6341 | ***********************************************************************/ | |
6342 | ||
c3f13540 | 6343 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6344 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6345 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6346 | WINDOW nil means use the selected window. SHOW non-nil means |
6347 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6348 | don't show a cursor. */) |
5842a27b | 6349 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6350 | { |
5f5c8ee5 GM |
6351 | /* Don't change cursor state while redisplaying. This could confuse |
6352 | output routines. */ | |
6353 | if (!redisplaying_p) | |
6354 | { | |
6355 | if (NILP (window)) | |
6356 | window = selected_window; | |
6357 | else | |
b7826503 | 6358 | CHECK_WINDOW (window); |
177c0ea7 | 6359 | |
5d7791b3 | 6360 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6361 | } |
6362 | ||
6363 | return Qnil; | |
4588ec20 | 6364 | } |
5f5c8ee5 GM |
6365 | |
6366 | ||
5d7791b3 GM |
6367 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6368 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6369 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6370 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6371 | (Lisp_Object window) |
5d7791b3 GM |
6372 | { |
6373 | struct window *w; | |
177c0ea7 | 6374 | |
5d7791b3 GM |
6375 | if (NILP (window)) |
6376 | window = selected_window; | |
6377 | else | |
b7826503 | 6378 | CHECK_WINDOW (window); |
177c0ea7 | 6379 | |
5d7791b3 | 6380 | w = XWINDOW (window); |
177c0ea7 | 6381 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6382 | } |
6383 | ||
87478b52 SM |
6384 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6385 | Slast_nonminibuf_frame, 0, 0, 0, | |
6386 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6387 | (void) |
87478b52 | 6388 | { |
4958ed94 | 6389 | Lisp_Object frame = Qnil; |
87478b52 | 6390 | |
4958ed94 SM |
6391 | if (last_nonminibuf_frame) |
6392 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6393 | |
6394 | return frame; | |
6395 | } | |
4588ec20 | 6396 | \f |
5f5c8ee5 GM |
6397 | /*********************************************************************** |
6398 | Initialization | |
6399 | ***********************************************************************/ | |
6400 | ||
dfcf069d | 6401 | void |
971de7fb | 6402 | syms_of_display (void) |
4588ec20 | 6403 | { |
502b9b64 | 6404 | defsubr (&Sredraw_frame); |
4588ec20 | 6405 | defsubr (&Sredraw_display); |
078b3696 | 6406 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6407 | defsubr (&Sopen_termscript); |
6408 | defsubr (&Sding); | |
7ba07a1a | 6409 | defsubr (&Sredisplay); |
4588ec20 JB |
6410 | defsubr (&Ssleep_for); |
6411 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6412 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6413 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6414 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6415 | |
2d5912c1 | 6416 | #if GLYPH_DEBUG |
9b0e97aa GM |
6417 | defsubr (&Sdump_redisplay_history); |
6418 | #endif | |
6419 | ||
d1dad759 | 6420 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6421 | staticpro (&frame_and_buffer_state); |
6422 | ||
cd3520a4 JB |
6423 | DEFSYM (Qdisplay_table, "display-table"); |
6424 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6425 | |
29208e82 | 6426 | DEFVAR_INT ("baud-rate", baud_rate, |
bacf09b4 | 6427 | doc: /* *The output baud rate of the terminal. |
228299fa GM |
6428 | On most systems, changing this value will affect the amount of padding |
6429 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6430 | |
29208e82 | 6431 | DEFVAR_BOOL ("inverse-video", inverse_video, |
bacf09b4 | 6432 | doc: /* *Non-nil means invert the entire frame display. |
228299fa | 6433 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6434 | |
29208e82 | 6435 | DEFVAR_BOOL ("visible-bell", visible_bell, |
bacf09b4 | 6436 | doc: /* *Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6437 | |
6438 | See also `ring-bell-function'. */); | |
177c0ea7 | 6439 | |
29208e82 | 6440 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
bacf09b4 | 6441 | doc: /* *Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6442 | A non-nil value is useful if the terminal can automatically preserve |
6443 | Emacs's frame display when you reenter Emacs. | |
6444 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6445 | |
29208e82 | 6446 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6447 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6448 | The value is a symbol: |
6449 | nil for a termcap frame (a character-only terminal), | |
6450 | 'x' for an Emacs frame that is really an X window, | |
6451 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6452 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6453 | 'pc' for a direct-write MS-DOS frame. | |
6454 | ||
6455 | Use of this variable as a boolean is deprecated. Instead, | |
6456 | use `display-graphic-p' or any of the other `display-*-p' | |
6457 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6458 | |
70b8d0a4 SM |
6459 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6460 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6461 | The value is a symbol: |
6462 | nil for a termcap frame (a character-only terminal), | |
6463 | 'x' for an Emacs frame that is really an X window, | |
6464 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6465 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6466 | 'pc' for a direct-write MS-DOS frame. | |
6467 | ||
6468 | Use of this variable as a boolean is deprecated. Instead, | |
6469 | use `display-graphic-p' or any of the other `display-*-p' | |
6470 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6471 | |
29208e82 | 6472 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6473 | doc: /* The version number of the window system in use. |
c22140f6 | 6474 | For X windows, this is 11. */); |
177c0ea7 | 6475 | |
29208e82 | 6476 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6477 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6478 | |
29208e82 | 6479 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6480 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6481 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6482 | Each element can be: | |
6483 | integer: a glyph code which this glyph is an alias for. | |
6484 | string: output this glyph using that string (not impl. in X windows). | |
6485 | nil: this glyph mod 524288 is the code of a character to output, | |
6486 | and this glyph / 524288 is the face number (see `face-id') to use | |
6487 | while outputting it. */); | |
4588ec20 JB |
6488 | Vglyph_table = Qnil; |
6489 | ||
29208e82 | 6490 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6491 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6492 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6493 | Vstandard_display_table = Qnil; |
6494 | ||
29208e82 | 6495 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
bacf09b4 | 6496 | doc: /* *Non-nil means update isn't paused when input is detected. */); |
5f5c8ee5 GM |
6497 | redisplay_dont_pause = 0; |
6498 | ||
d012c62b | 6499 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6500 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
d012c62b KS |
6501 | doc: /* *The period in seconds between checking for input during redisplay. |
6502 | If input is detected, redisplay is pre-empted, and the input is processed. | |
6503 | If nil, never pre-empt redisplay. */); | |
6504 | Vredisplay_preemption_period = make_float (0.10); | |
6505 | #endif | |
6506 | ||
4588ec20 JB |
6507 | #ifdef CANNOT_DUMP |
6508 | if (noninteractive) | |
6509 | #endif | |
6510 | { | |
2246281f | 6511 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6512 | Vwindow_system_version = Qnil; |
6513 | } | |
6514 | } |