Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
9311dcff GM |
2 | |
3 | Copyright (C) 1985-1988, 1993-1995, 1997-2012 Free Software Foundation, Inc. | |
4588ec20 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
4588ec20 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 19 | |
18160b98 | 20 | #include <config.h> |
68c45bf0 | 21 | #include <signal.h> |
565620a5 | 22 | #include <stdio.h> |
4588ec20 | 23 | #include <ctype.h> |
d7306fe6 | 24 | #include <setjmp.h> |
dfcf069d | 25 | #include <unistd.h> |
dfcf069d | 26 | |
47099d6f | 27 | #include "lisp.h" |
4588ec20 JB |
28 | #include "termchar.h" |
29 | #include "termopts.h" | |
a0879520 | 30 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
31 | #include "dispextern.h" |
32 | #include "cm.h" | |
83be827a | 33 | #include "character.h" |
e5560ff7 | 34 | #include "buffer.h" |
d43721a2 | 35 | #include "keyboard.h" |
502b9b64 | 36 | #include "frame.h" |
428a555e | 37 | #include "termhooks.h" |
4588ec20 JB |
38 | #include "window.h" |
39 | #include "commands.h" | |
40 | #include "disptab.h" | |
41 | #include "indent.h" | |
d169fe39 | 42 | #include "intervals.h" |
97cf50e7 | 43 | #include "blockinput.h" |
dfcf069d | 44 | #include "process.h" |
4588ec20 | 45 | |
58b2bb63 | 46 | #include "syssignal.h" |
a41f8bed | 47 | |
4588ec20 JB |
48 | #ifdef HAVE_X_WINDOWS |
49 | #include "xterm.h" | |
5f5c8ee5 | 50 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 51 | |
fd2e066a GV |
52 | #ifdef HAVE_NTGUI |
53 | #include "w32term.h" | |
54 | #endif /* HAVE_NTGUI */ | |
55 | ||
edfda783 AR |
56 | #ifdef HAVE_NS |
57 | #include "nsterm.h" | |
58 | #endif | |
59 | ||
5f5c8ee5 | 60 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 61 | |
5f5c8ee5 | 62 | #include "systime.h" |
3883a901 RS |
63 | #include <errno.h> |
64 | ||
4588ec20 | 65 | /* Get number of chars of output now in the buffer of a stdio stream. |
5a5fa834 | 66 | This ought to be built in stdio, but it isn't. Some s- files |
5f5c8ee5 | 67 | override this because their stdio internals differ. */ |
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. */ | |
3883a901 RS |
73 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
74 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
75 | #else | |
cb5558ff | 76 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 77 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 | 78 | #endif |
c59592b3 GM |
79 | |
80 | /* not __GNU_LIBRARY__ and no PENDING_OUTPUT_COUNT defined */ | |
81 | #elif !defined (PENDING_OUTPUT_COUNT) | |
82 | ||
83 | #if HAVE_STDIO_EXT_H && HAVE___FPENDING | |
68c45bf0 PE |
84 | #include <stdio_ext.h> |
85 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
c59592b3 | 86 | #else |
4588ec20 JB |
87 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
88 | #endif | |
c59592b3 GM |
89 | |
90 | #endif /* not __GNU_LIBRARY__ and no PENDING_OUTPUT_COUNT defined */ | |
5f5c8ee5 | 91 | |
9311dcff | 92 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
93 | #include <term.h> /* for tgetent */ |
94 | #endif | |
5f5c8ee5 GM |
95 | \f |
96 | /* Structure to pass dimensions around. Used for character bounding | |
97 | boxes, glyph matrix dimensions and alike. */ | |
98 | ||
99 | struct dim | |
100 | { | |
101 | int width; | |
102 | int height; | |
103 | }; | |
104 | ||
105 | \f | |
106 | /* Function prototypes. */ | |
107 | ||
f57e2426 | 108 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
109 | static int required_matrix_height (struct window *); |
110 | static int required_matrix_width (struct window *); | |
f57e2426 | 111 | static void adjust_frame_glyphs (struct frame *); |
f57e2426 | 112 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); |
d311d28c | 113 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
114 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
115 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
116 | struct window *); | |
117 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
118 | struct window *); | |
f57e2426 J |
119 | static void adjust_frame_message_buffer (struct frame *); |
120 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
121 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
f57e2426 J |
122 | static void clear_window_matrices (struct window *, int); |
123 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
124 | static int scrolling_window (struct window *, int); | |
125 | static int update_window_line (struct window *, int, int *); | |
f57e2426 | 126 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 127 | #ifdef GLYPH_DEBUG |
f57e2426 J |
128 | static void check_matrix_pointers (struct glyph_matrix *, |
129 | struct glyph_matrix *); | |
b96fd3e8 | 130 | #endif |
f57e2426 J |
131 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
132 | static int update_window_tree (struct window *, int); | |
133 | static int update_window (struct window *, int); | |
134 | static int update_frame_1 (struct frame *, int, int); | |
5bf46f05 | 135 | static int scrolling (struct frame *); |
f57e2426 | 136 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
137 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
138 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 139 | |
5f5c8ee5 | 140 | \f |
d012c62b KS |
141 | /* Redisplay preemption timers. */ |
142 | ||
143 | static EMACS_TIME preemption_period; | |
144 | static EMACS_TIME preemption_next_check; | |
145 | ||
a41f8bed | 146 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 147 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 148 | |
502b9b64 | 149 | int frame_garbaged; |
4588ec20 | 150 | |
5f5c8ee5 | 151 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
152 | |
153 | int display_completed; | |
154 | ||
e7067d00 | 155 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 156 | |
4588ec20 | 157 | \f |
5f5c8ee5 | 158 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 159 | variable always equals the_only_frame. */ |
4588ec20 | 160 | |
91fb7e1b | 161 | Lisp_Object selected_frame; |
4588ec20 | 162 | |
5f5c8ee5 | 163 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 164 | frames. This is usually the most recent such frame that was |
87485d6f MW |
165 | selected. In a single-frame version, this variable always holds |
166 | the address of the_only_frame. */ | |
4588ec20 | 167 | |
5f5c8ee5 | 168 | struct frame *last_nonminibuf_frame; |
d52bad65 | 169 | |
5f5c8ee5 | 170 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 171 | |
5bf46f05 | 172 | static int delayed_size_change; |
4588ec20 | 173 | |
5f5c8ee5 | 174 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 175 | |
5f5c8ee5 | 176 | static int glyphs_initialized_initially_p; |
4588ec20 | 177 | |
5f5c8ee5 | 178 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 179 | |
5f5c8ee5 | 180 | struct window *updated_window; |
4588ec20 | 181 | |
5f5c8ee5 | 182 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 183 | |
5f5c8ee5 GM |
184 | struct glyph_row *updated_row; |
185 | int updated_area; | |
4588ec20 | 186 | |
5f5c8ee5 | 187 | /* A glyph for a space. */ |
4588ec20 | 188 | |
5f5c8ee5 | 189 | struct glyph space_glyph; |
4588ec20 | 190 | |
5f5c8ee5 GM |
191 | /* Counts of allocated structures. These counts serve to diagnose |
192 | memory leaks and double frees. */ | |
4588ec20 | 193 | |
5bf46f05 PE |
194 | static int glyph_matrix_count; |
195 | static int glyph_pool_count; | |
4588ec20 | 196 | |
5f5c8ee5 GM |
197 | /* If non-null, the frame whose frame matrices are manipulated. If |
198 | null, window matrices are worked on. */ | |
4588ec20 | 199 | |
5f5c8ee5 | 200 | static struct frame *frame_matrix_frame; |
4588ec20 | 201 | |
5f5c8ee5 GM |
202 | /* Non-zero means that fonts have been loaded since the last glyph |
203 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
204 | be adjusted when this flag becomes non-zero during display. The | |
205 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
206 | loaded on demand. Another reason is that a line contains many |
207 | characters displayed by zero width or very narrow glyphs of | |
208 | variable-width fonts. */ | |
836d2cde | 209 | |
5f5c8ee5 | 210 | int fonts_changed_p; |
836d2cde | 211 | |
177c0ea7 | 212 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 213 | This may only be used for terminal frames. */ |
836d2cde | 214 | |
e509cfa6 | 215 | #ifdef GLYPH_DEBUG |
4588ec20 | 216 | |
f57e2426 J |
217 | static int window_to_frame_vpos (struct window *, int); |
218 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
219 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
220 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 221 | |
9b0e97aa GM |
222 | /* One element of the ring buffer containing redisplay history |
223 | information. */ | |
224 | ||
225 | struct redisplay_history | |
226 | { | |
227 | char trace[512 + 100]; | |
228 | }; | |
229 | ||
230 | /* The size of the history buffer. */ | |
231 | ||
232 | #define REDISPLAY_HISTORY_SIZE 30 | |
233 | ||
234 | /* The redisplay history buffer. */ | |
235 | ||
236 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
237 | ||
238 | /* Next free entry in redisplay_history. */ | |
239 | ||
240 | static int history_idx; | |
241 | ||
242 | /* A tick that's incremented each time something is added to the | |
243 | history. */ | |
244 | ||
dfd153ae | 245 | static uprintmax_t history_tick; |
9b0e97aa | 246 | |
f57e2426 | 247 | static void add_frame_display_history (struct frame *, int); |
6a8aec41 | 248 | \f |
9b0e97aa GM |
249 | /* Add to the redisplay history how window W has been displayed. |
250 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 251 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
252 | has been interrupted for pending input. */ |
253 | ||
254 | static void | |
c56e0fd5 | 255 | add_window_display_history (struct window *w, const char *msg, int paused_p) |
9b0e97aa GM |
256 | { |
257 | char *buf; | |
177c0ea7 | 258 | |
9b0e97aa GM |
259 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
260 | history_idx = 0; | |
261 | buf = redisplay_history[history_idx].trace; | |
262 | ++history_idx; | |
177c0ea7 | 263 | |
8666506e PE |
264 | snprintf (buf, sizeof redisplay_history[0].trace, |
265 | "%"pMu": window %p (`%s')%s\n%s", | |
266 | history_tick++, | |
267 | w, | |
268 | ((BUFFERP (w->buffer) | |
269 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
270 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
271 | : "???"), | |
272 | paused_p ? " ***paused***" : "", | |
273 | msg); | |
9b0e97aa GM |
274 | } |
275 | ||
276 | ||
277 | /* Add to the redisplay history that frame F has been displayed. | |
278 | PAUSED_P non-zero means that the update has been interrupted for | |
279 | pending input. */ | |
280 | ||
281 | static void | |
59fc5cf9 | 282 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
283 | { |
284 | char *buf; | |
177c0ea7 | 285 | |
9b0e97aa GM |
286 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
287 | history_idx = 0; | |
288 | buf = redisplay_history[history_idx].trace; | |
289 | ++history_idx; | |
177c0ea7 | 290 | |
dfd153ae | 291 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
292 | history_tick++, |
293 | f, paused_p ? " ***paused***" : ""); | |
294 | } | |
295 | ||
296 | ||
a7ca3326 | 297 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 298 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 299 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 300 | (void) |
9b0e97aa GM |
301 | { |
302 | int i; | |
303 | ||
304 | for (i = history_idx - 1; i != history_idx; --i) | |
305 | { | |
306 | if (i < 0) | |
307 | i = REDISPLAY_HISTORY_SIZE - 1; | |
308 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
309 | } | |
310 | ||
311 | return Qnil; | |
312 | } | |
313 | ||
314 | ||
e509cfa6 | 315 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 316 | |
7df02016 KS |
317 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
318 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 319 | |
e509cfa6 | 320 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 321 | |
4588ec20 | 322 | |
9e4bf381 PE |
323 | #if (defined PROFILING \ |
324 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
325 | && !HAVE___EXECUTABLE_START) | |
326 | /* This function comes first in the Emacs executable and is used only | |
327 | to estimate the text start for profiling. */ | |
4588ec20 | 328 | void |
9e4bf381 | 329 | __executable_start (void) |
4588ec20 | 330 | { |
72af86bd | 331 | abort (); |
177c0ea7 | 332 | } |
72af86bd | 333 | #endif |
5f5c8ee5 GM |
334 | \f |
335 | /*********************************************************************** | |
336 | Glyph Matrices | |
337 | ***********************************************************************/ | |
338 | ||
339 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
340 | pool from which memory for the matrix should be allocated, or null | |
341 | for window-based redisplay where no glyph pools are used. The | |
342 | member `pool' of the glyph matrix structure returned is set to | |
343 | POOL, the structure is otherwise zeroed. */ | |
344 | ||
5bf46f05 | 345 | static struct glyph_matrix * |
971de7fb | 346 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 347 | { |
23f86fce | 348 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 349 | |
5f5c8ee5 GM |
350 | /* Increment number of allocated matrices. This count is used |
351 | to detect memory leaks. */ | |
352 | ++glyph_matrix_count; | |
4588ec20 | 353 | |
5f5c8ee5 GM |
354 | /* Set pool and return. */ |
355 | result->pool = pool; | |
356 | return result; | |
4588ec20 JB |
357 | } |
358 | ||
4588ec20 | 359 | |
5f5c8ee5 GM |
360 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
361 | ||
362 | The global counter glyph_matrix_count is decremented when a matrix | |
363 | is freed. If the count gets negative, more structures were freed | |
364 | than allocated, i.e. one matrix was freed more than once or a bogus | |
365 | pointer was passed to this function. | |
177c0ea7 | 366 | |
5f5c8ee5 GM |
367 | If MATRIX->pool is null, this means that the matrix manages its own |
368 | glyph memory---this is done for matrices on X frames. Freeing the | |
369 | matrix also frees the glyph memory in this case. */ | |
370 | ||
371 | static void | |
971de7fb | 372 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 373 | { |
5f5c8ee5 GM |
374 | if (matrix) |
375 | { | |
376 | int i; | |
377 | ||
378 | /* Detect the case that more matrices are freed than were | |
379 | allocated. */ | |
380 | if (--glyph_matrix_count < 0) | |
381 | abort (); | |
382 | ||
383 | /* Free glyph memory if MATRIX owns it. */ | |
384 | if (matrix->pool == NULL) | |
385 | for (i = 0; i < matrix->rows_allocated; ++i) | |
386 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 387 | |
5f5c8ee5 GM |
388 | /* Free row structures and the matrix itself. */ |
389 | xfree (matrix->rows); | |
390 | xfree (matrix); | |
391 | } | |
392 | } | |
4588ec20 | 393 | |
4588ec20 | 394 | |
5f5c8ee5 GM |
395 | /* Return the number of glyphs to reserve for a marginal area of |
396 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
397 | display line of window W. MARGIN gives the width of the marginal | |
398 | area in canonical character units. MARGIN should be an integer | |
399 | or a float. */ | |
400 | ||
401 | static int | |
971de7fb | 402 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
403 | { |
404 | int n; | |
4588ec20 | 405 | |
5f5c8ee5 | 406 | if (NUMBERP (margin)) |
4588ec20 | 407 | { |
7df02016 | 408 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
409 | double d = max (0, XFLOATINT (margin)); |
410 | d = min (width / 2 - 1, d); | |
35ec832e | 411 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
412 | } |
413 | else | |
414 | n = 0; | |
415 | ||
416 | return n; | |
417 | } | |
418 | ||
e509cfa6 DA |
419 | /* Return non-zero if ROW's hash value is correct, zero if not. |
420 | Optimized away if ENABLE_CHECKING is not defined. */ | |
421 | ||
a54e2c05 | 422 | static int |
7a7270dd EZ |
423 | verify_row_hash (struct glyph_row *row) |
424 | { | |
015137db | 425 | return row->hash == row_hash (row); |
7a7270dd | 426 | } |
4588ec20 | 427 | |
5f5c8ee5 GM |
428 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
429 | window sizes. | |
4588ec20 | 430 | |
5f5c8ee5 GM |
431 | W is null if the function is called for a frame glyph matrix. |
432 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
433 | indices of the first column and row of MATRIX within the frame | |
434 | matrix, if such a matrix exists. They are zero for purely | |
435 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 436 | |
5f5c8ee5 GM |
437 | In window-based redisplay, where no frame matrices exist, glyph |
438 | matrices manage their own glyph storage. Otherwise, they allocate | |
439 | storage from a common frame glyph pool which can be found in | |
440 | MATRIX->pool. | |
23b0200c | 441 | |
5f5c8ee5 GM |
442 | The reason for this memory management strategy is to avoid complete |
443 | frame redraws if possible. When we allocate from a common pool, a | |
444 | change of the location or size of a sub-matrix within the pool | |
445 | requires a complete redisplay of the frame because we cannot easily | |
446 | make sure that the current matrices of all windows still agree with | |
447 | what is displayed on the screen. While this is usually fast, it | |
448 | leads to screen flickering. */ | |
23b0200c | 449 | |
5f5c8ee5 | 450 | static void |
971de7fb | 451 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
452 | { |
453 | int i; | |
454 | int new_rows; | |
455 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
456 | int header_line_changed_p = 0; |
457 | int header_line_p = 0; | |
5f5c8ee5 | 458 | int left = -1, right = -1; |
ca8a12a7 | 459 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 460 | |
6b61353c KH |
461 | /* See if W had a header line that has disappeared now, or vice versa. |
462 | Get W's size. */ | |
5f5c8ee5 GM |
463 | if (w) |
464 | { | |
6b61353c KH |
465 | window_box (w, -1, 0, 0, &window_width, &window_height); |
466 | ||
045dee35 GM |
467 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
468 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 469 | } |
045dee35 | 470 | matrix->header_line_p = header_line_p; |
23b0200c | 471 | |
6b61353c KH |
472 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
473 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
474 | haven't changed. This optimization is important because preserving |
475 | the matrix means preventing redisplay. */ | |
476 | if (matrix->pool == NULL) | |
477 | { | |
7df02016 KS |
478 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
479 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 480 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
481 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
482 | || right != matrix->right_margin_glyphs); | |
483 | ||
484 | if (!marginal_areas_changed_p | |
485 | && !fonts_changed_p | |
045dee35 | 486 | && !header_line_changed_p |
7df02016 KS |
487 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
488 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
489 | && matrix->window_height == window_height |
490 | && matrix->window_vscroll == w->vscroll | |
491 | && matrix->window_width == window_width) | |
492 | return; | |
493 | } | |
177c0ea7 | 494 | |
5f5c8ee5 GM |
495 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
496 | if (matrix->rows_allocated < dim.height) | |
497 | { | |
0065d054 | 498 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 499 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
500 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
501 | new_rows, INT_MAX, sizeof *matrix->rows); | |
502 | memset (matrix->rows + old_alloc, 0, | |
503 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
504 | } |
505 | else | |
506 | new_rows = 0; | |
60a8948a | 507 | |
5f5c8ee5 GM |
508 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
509 | on a frame not using window-based redisplay. Set up pointers for | |
510 | each row into the glyph pool. */ | |
511 | if (matrix->pool) | |
512 | { | |
a54e2c05 | 513 | eassert (matrix->pool->glyphs); |
177c0ea7 | 514 | |
5f5c8ee5 | 515 | if (w) |
60a8948a | 516 | { |
5f5c8ee5 | 517 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 518 | w->left_margin_cols); |
5f5c8ee5 | 519 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 520 | w->right_margin_cols); |
60a8948a | 521 | } |
5f5c8ee5 GM |
522 | else |
523 | left = right = 0; | |
177c0ea7 | 524 | |
5f5c8ee5 | 525 | for (i = 0; i < dim.height; ++i) |
60a8948a | 526 | { |
5f5c8ee5 | 527 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
528 | |
529 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
530 | = (matrix->pool->glyphs |
531 | + (y + i) * matrix->pool->ncolumns | |
532 | + x); | |
177c0ea7 | 533 | |
5f5c8ee5 GM |
534 | if (w == NULL |
535 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 536 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
537 | { |
538 | row->glyphs[TEXT_AREA] | |
539 | = row->glyphs[LEFT_MARGIN_AREA]; | |
540 | row->glyphs[RIGHT_MARGIN_AREA] | |
541 | = row->glyphs[TEXT_AREA] + dim.width; | |
542 | row->glyphs[LAST_AREA] | |
543 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
544 | } | |
545 | else | |
546 | { | |
547 | row->glyphs[TEXT_AREA] | |
548 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
549 | row->glyphs[RIGHT_MARGIN_AREA] | |
550 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
551 | row->glyphs[LAST_AREA] | |
552 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
553 | } | |
60a8948a | 554 | } |
177c0ea7 | 555 | |
5f5c8ee5 GM |
556 | matrix->left_margin_glyphs = left; |
557 | matrix->right_margin_glyphs = right; | |
558 | } | |
559 | else | |
560 | { | |
561 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
562 | its own memory. It is a window matrix for window-based redisplay. |
563 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
564 | if (dim.width > matrix->matrix_w |
565 | || new_rows | |
045dee35 | 566 | || header_line_changed_p |
5f5c8ee5 | 567 | || marginal_areas_changed_p) |
4588ec20 | 568 | { |
5f5c8ee5 GM |
569 | struct glyph_row *row = matrix->rows; |
570 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 571 | |
5f5c8ee5 GM |
572 | while (row < end) |
573 | { | |
574 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
575 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
576 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 577 | |
5f5c8ee5 GM |
578 | /* The mode line never has marginal areas. */ |
579 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 580 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
581 | { |
582 | row->glyphs[TEXT_AREA] | |
583 | = row->glyphs[LEFT_MARGIN_AREA]; | |
584 | row->glyphs[RIGHT_MARGIN_AREA] | |
585 | = row->glyphs[TEXT_AREA] + dim.width; | |
586 | row->glyphs[LAST_AREA] | |
587 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
588 | } | |
589 | else | |
590 | { | |
591 | row->glyphs[TEXT_AREA] | |
592 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
593 | row->glyphs[RIGHT_MARGIN_AREA] | |
594 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
595 | row->glyphs[LAST_AREA] | |
596 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
597 | } | |
598 | ++row; | |
599 | } | |
4588ec20 JB |
600 | } |
601 | ||
a54e2c05 | 602 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
603 | matrix->left_margin_glyphs = left; |
604 | matrix->right_margin_glyphs = right; | |
605 | } | |
177c0ea7 | 606 | |
5f5c8ee5 GM |
607 | /* Number of rows to be used by MATRIX. */ |
608 | matrix->nrows = dim.height; | |
a54e2c05 | 609 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 610 | |
b7b20fbd | 611 | if (w) |
5f5c8ee5 | 612 | { |
b7b20fbd | 613 | if (matrix == w->current_matrix) |
4588ec20 | 614 | { |
b7b20fbd GM |
615 | /* Mark rows in a current matrix of a window as not having |
616 | valid contents. It's important to not do this for | |
617 | desired matrices. When Emacs starts, it may already be | |
618 | building desired matrices when this function runs. */ | |
619 | if (window_width < 0) | |
620 | window_width = window_box_width (w, -1); | |
177c0ea7 | 621 | |
b7b20fbd GM |
622 | /* Optimize the case that only the height has changed (C-x 2, |
623 | upper window). Invalidate all rows that are no longer part | |
624 | of the window. */ | |
625 | if (!marginal_areas_changed_p | |
73d75a62 GM |
626 | && !header_line_changed_p |
627 | && new_rows == 0 | |
628 | && dim.width == matrix->matrix_w | |
7df02016 KS |
629 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
630 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 631 | && matrix->window_width == window_width) |
b7b20fbd | 632 | { |
dd42b31a GM |
633 | /* Find the last row in the window. */ |
634 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
635 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
636 | { | |
26447967 | 637 | ++i; |
dd42b31a GM |
638 | break; |
639 | } | |
b7b20fbd GM |
640 | |
641 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 642 | are invalidated below. */ |
b7b20fbd GM |
643 | if (INTEGERP (w->window_end_vpos) |
644 | && XFASTINT (w->window_end_vpos) >= i) | |
645 | w->window_end_valid = Qnil; | |
177c0ea7 | 646 | |
b7b20fbd GM |
647 | while (i < matrix->nrows) |
648 | matrix->rows[i++].enabled_p = 0; | |
649 | } | |
650 | else | |
651 | { | |
652 | for (i = 0; i < matrix->nrows; ++i) | |
653 | matrix->rows[i].enabled_p = 0; | |
654 | } | |
5f5c8ee5 | 655 | } |
b7b20fbd | 656 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 657 | { |
b7b20fbd GM |
658 | /* Rows in desired matrices always have to be cleared; |
659 | redisplay expects this is the case when it runs, so it | |
660 | had better be the case when we adjust matrices between | |
661 | redisplays. */ | |
5f5c8ee5 GM |
662 | for (i = 0; i < matrix->nrows; ++i) |
663 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 664 | } |
4588ec20 | 665 | } |
177c0ea7 JB |
666 | |
667 | ||
5f5c8ee5 GM |
668 | /* Remember last values to be able to optimize frame redraws. */ |
669 | matrix->matrix_x = x; | |
670 | matrix->matrix_y = y; | |
671 | matrix->matrix_w = dim.width; | |
672 | matrix->matrix_h = dim.height; | |
673 | ||
674 | /* Record the top y location and height of W at the time the matrix | |
675 | was last adjusted. This is used to optimize redisplay above. */ | |
676 | if (w) | |
4588ec20 | 677 | { |
7df02016 KS |
678 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
679 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
680 | matrix->window_height = window_height; |
681 | matrix->window_width = window_width; | |
682 | matrix->window_vscroll = w->vscroll; | |
683 | } | |
684 | } | |
4588ec20 | 685 | |
4588ec20 | 686 | |
5f5c8ee5 GM |
687 | /* Reverse the contents of rows in MATRIX between START and END. The |
688 | contents of the row at END - 1 end up at START, END - 2 at START + | |
689 | 1 etc. This is part of the implementation of rotate_matrix (see | |
690 | below). */ | |
d52bad65 | 691 | |
5f5c8ee5 | 692 | static void |
971de7fb | 693 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
694 | { |
695 | int i, j; | |
23b0200c | 696 | |
5f5c8ee5 GM |
697 | for (i = start, j = end - 1; i < j; ++i, --j) |
698 | { | |
699 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
700 | initialization. */ | |
701 | struct glyph_row temp; | |
702 | temp = matrix->rows[i]; | |
703 | matrix->rows[i] = matrix->rows[j]; | |
704 | matrix->rows[j] = temp; | |
705 | } | |
706 | } | |
23b0200c | 707 | |
23b0200c | 708 | |
5f5c8ee5 GM |
709 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
710 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
711 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
712 | row structures are moved around). | |
60a8948a | 713 | |
5f5c8ee5 GM |
714 | The algorithm used for rotating the vector was, I believe, first |
715 | described by Kernighan. See the vector R as consisting of two | |
716 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
717 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
718 | and reverse the result to get (ArBr)r which is BA. Similar for | |
719 | rotating right. */ | |
720 | ||
721 | void | |
971de7fb | 722 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
723 | { |
724 | if (by < 0) | |
725 | { | |
726 | /* Up (rotate left, i.e. towards lower indices). */ | |
727 | by = -by; | |
728 | reverse_rows (matrix, first, first + by); | |
729 | reverse_rows (matrix, first + by, last); | |
730 | reverse_rows (matrix, first, last); | |
731 | } | |
732 | else if (by > 0) | |
733 | { | |
734 | /* Down (rotate right, i.e. towards higher indices). */ | |
735 | reverse_rows (matrix, last - by, last); | |
736 | reverse_rows (matrix, first, last - by); | |
737 | reverse_rows (matrix, first, last); | |
738 | } | |
739 | } | |
740 | ||
741 | ||
742 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
743 | with indices START <= index < END. Increment positions by DELTA/ | |
744 | DELTA_BYTES. */ | |
745 | ||
746 | void | |
ace1712c | 747 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 748 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
749 | { |
750 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
751 | eassert (start >= 0 && start <= matrix->nrows); |
752 | eassert (end >= 0 && end <= matrix->nrows); | |
753 | eassert (start <= end); | |
5f5c8ee5 GM |
754 | |
755 | for (; start < end; ++start) | |
86c11ba1 | 756 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
757 | } |
758 | ||
759 | ||
760 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
761 | the row indices of the first and last + 1 row to enable. If | |
762 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
763 | ||
764 | void | |
971de7fb | 765 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 766 | { |
a54e2c05 DA |
767 | eassert (start <= end); |
768 | eassert (start >= 0 && start < matrix->nrows); | |
769 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 770 | |
5f5c8ee5 GM |
771 | for (; start < end; ++start) |
772 | matrix->rows[start].enabled_p = enabled_p != 0; | |
773 | } | |
774 | ||
775 | ||
776 | /* Clear MATRIX. | |
777 | ||
778 | This empties all rows in MATRIX by setting the enabled_p flag for | |
779 | all rows of the matrix to zero. The function prepare_desired_row | |
780 | will eventually really clear a row when it sees one with a zero | |
781 | enabled_p flag. | |
782 | ||
783 | Resets update hints to defaults value. The only update hint | |
784 | currently present is the flag MATRIX->no_scrolling_p. */ | |
785 | ||
786 | void | |
971de7fb | 787 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
788 | { |
789 | if (matrix) | |
790 | { | |
791 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
792 | matrix->no_scrolling_p = 0; | |
793 | } | |
794 | } | |
177c0ea7 | 795 | |
5f5c8ee5 GM |
796 | |
797 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
798 | Increment y-positions in glyph rows between START and END by DY, | |
799 | and recompute their visible height. */ | |
800 | ||
801 | void | |
971de7fb | 802 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
803 | { |
804 | int min_y, max_y; | |
177c0ea7 | 805 | |
a54e2c05 DA |
806 | eassert (start <= end); |
807 | eassert (start >= 0 && start < matrix->nrows); | |
808 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 809 | |
7df02016 KS |
810 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
811 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 812 | |
5f5c8ee5 GM |
813 | for (; start < end; ++start) |
814 | { | |
815 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 816 | |
5f5c8ee5 | 817 | row->y += dy; |
d6c747a4 | 818 | row->visible_height = row->height; |
177c0ea7 | 819 | |
5f5c8ee5 | 820 | if (row->y < min_y) |
d6c747a4 GM |
821 | row->visible_height -= min_y - row->y; |
822 | if (row->y + row->height > max_y) | |
823 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
824 | if (row->fringe_bitmap_periodic_p) |
825 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
826 | } |
827 | } | |
828 | ||
829 | ||
830 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
831 | invalid is done by setting enabled_p to zero for all rows in a | |
832 | current matrix. */ | |
833 | ||
834 | void | |
971de7fb | 835 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
836 | { |
837 | /* Clear frame current matrix, if we have one. */ | |
838 | if (f->current_matrix) | |
839 | clear_glyph_matrix (f->current_matrix); | |
840 | ||
841 | /* Clear the matrix of the menu bar window, if such a window exists. | |
842 | The menu bar window is currently used to display menus on X when | |
843 | no toolkit support is compiled in. */ | |
844 | if (WINDOWP (f->menu_bar_window)) | |
845 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
846 | ||
9ea173e8 GM |
847 | /* Clear the matrix of the tool-bar window, if any. */ |
848 | if (WINDOWP (f->tool_bar_window)) | |
849 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
850 | |
851 | /* Clear current window matrices. */ | |
a54e2c05 | 852 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
853 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
854 | } | |
855 | ||
856 | ||
857 | /* Clear out all display lines of F for a coming redisplay. */ | |
858 | ||
859 | void | |
971de7fb | 860 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
861 | { |
862 | if (f->desired_matrix) | |
863 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 864 | |
5f5c8ee5 GM |
865 | if (WINDOWP (f->menu_bar_window)) |
866 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
867 | ||
9ea173e8 GM |
868 | if (WINDOWP (f->tool_bar_window)) |
869 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
870 | |
871 | /* Do it for window matrices. */ | |
a54e2c05 | 872 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
873 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
874 | } | |
875 | ||
876 | ||
877 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
878 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
879 | ||
880 | static void | |
971de7fb | 881 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
882 | { |
883 | while (w) | |
884 | { | |
885 | if (!NILP (w->hchild)) | |
886 | { | |
a54e2c05 | 887 | eassert (WINDOWP (w->hchild)); |
5f5c8ee5 GM |
888 | clear_window_matrices (XWINDOW (w->hchild), desired_p); |
889 | } | |
890 | else if (!NILP (w->vchild)) | |
891 | { | |
a54e2c05 | 892 | eassert (WINDOWP (w->vchild)); |
5f5c8ee5 GM |
893 | clear_window_matrices (XWINDOW (w->vchild), desired_p); |
894 | } | |
895 | else | |
896 | { | |
897 | if (desired_p) | |
898 | clear_glyph_matrix (w->desired_matrix); | |
899 | else | |
900 | { | |
901 | clear_glyph_matrix (w->current_matrix); | |
902 | w->window_end_valid = Qnil; | |
903 | } | |
904 | } | |
905 | ||
906 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
907 | } | |
908 | } | |
909 | ||
910 | ||
911 | \f | |
912 | /*********************************************************************** | |
913 | Glyph Rows | |
914 | ||
915 | See dispextern.h for an overall explanation of glyph rows. | |
916 | ***********************************************************************/ | |
917 | ||
918 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
919 | changes in the glyph_row structure, i.e. addition or removal of | |
920 | structure members. */ | |
921 | ||
2cca872d KH |
922 | static struct glyph_row null_row; |
923 | ||
5f5c8ee5 | 924 | void |
971de7fb | 925 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
926 | { |
927 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
928 | |
929 | /* Save pointers. */ | |
930 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
931 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
932 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
933 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
934 | ||
935 | /* Clear. */ | |
936 | *row = null_row; | |
937 | ||
938 | /* Restore pointers. */ | |
939 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
940 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
941 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
942 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
943 | |
944 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
945 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
946 | Redisplay outputs such glyphs, and flickering effects were | |
947 | the result. This also depended on the contents of memory | |
948 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 949 | the code below. If the flickering is gone with that, chances |
45560b1a | 950 | are that the flickering has the same reason as here. */ |
72af86bd | 951 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 952 | #endif |
5f5c8ee5 GM |
953 | } |
954 | ||
955 | ||
956 | /* Make ROW an empty, enabled row of canonical character height, | |
957 | in window W starting at y-position Y. */ | |
958 | ||
959 | void | |
971de7fb | 960 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
961 | { |
962 | int min_y, max_y; | |
177c0ea7 | 963 | |
7df02016 KS |
964 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
965 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 966 | |
5f5c8ee5 GM |
967 | clear_glyph_row (row); |
968 | row->y = y; | |
408f5064 | 969 | row->ascent = row->phys_ascent = 0; |
7df02016 | 970 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 971 | row->visible_height = row->height; |
177c0ea7 | 972 | |
5f5c8ee5 | 973 | if (row->y < min_y) |
d6c747a4 GM |
974 | row->visible_height -= min_y - row->y; |
975 | if (row->y + row->height > max_y) | |
976 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
977 | |
978 | row->enabled_p = 1; | |
979 | } | |
980 | ||
981 | ||
982 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
983 | are the amounts by which to change positions. Note that the first | |
984 | glyph of the text area of a row can have a buffer position even if | |
985 | the used count of the text area is zero. Such rows display line | |
986 | ends. */ | |
987 | ||
5bf46f05 | 988 | static void |
ace1712c | 989 | increment_row_positions (struct glyph_row *row, |
d311d28c | 990 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
991 | { |
992 | int area, i; | |
993 | ||
994 | /* Increment start and end positions. */ | |
995 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
996 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
997 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
998 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
999 | CHARPOS (row->start.pos) += delta; |
1000 | BYTEPOS (row->start.pos) += delta_bytes; | |
1001 | CHARPOS (row->end.pos) += delta; | |
1002 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1003 | |
5cacdcfd KS |
1004 | if (!row->enabled_p) |
1005 | return; | |
1006 | ||
5f5c8ee5 GM |
1007 | /* Increment positions in glyphs. */ |
1008 | for (area = 0; area < LAST_AREA; ++area) | |
1009 | for (i = 0; i < row->used[area]; ++i) | |
1010 | if (BUFFERP (row->glyphs[area][i].object) | |
1011 | && row->glyphs[area][i].charpos > 0) | |
1012 | row->glyphs[area][i].charpos += delta; | |
1013 | ||
1014 | /* Capture the case of rows displaying a line end. */ | |
1015 | if (row->used[TEXT_AREA] == 0 | |
1016 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1017 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1018 | } | |
1019 | ||
1020 | ||
9af3e742 | 1021 | #if 0 |
5f5c8ee5 GM |
1022 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1023 | contents, i.e. glyph structure contents are exchanged between A and | |
1024 | B without changing glyph pointers in A and B. */ | |
1025 | ||
1026 | static void | |
1dae0f0a | 1027 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1028 | { |
1029 | int area; | |
1030 | ||
1031 | for (area = 0; area < LAST_AREA; ++area) | |
1032 | { | |
1033 | /* Number of glyphs to swap. */ | |
1034 | int max_used = max (a->used[area], b->used[area]); | |
1035 | ||
1036 | /* Start of glyphs in area of row A. */ | |
1037 | struct glyph *glyph_a = a->glyphs[area]; | |
1038 | ||
1039 | /* End + 1 of glyphs in area of row A. */ | |
1040 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1041 | ||
1042 | /* Start of glyphs in area of row B. */ | |
1043 | struct glyph *glyph_b = b->glyphs[area]; | |
1044 | ||
1045 | while (glyph_a < glyph_a_end) | |
1046 | { | |
1047 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1048 | initialization. */ | |
1049 | struct glyph temp; | |
1050 | temp = *glyph_a; | |
1051 | *glyph_a = *glyph_b; | |
1052 | *glyph_b = temp; | |
1053 | ++glyph_a; | |
1054 | ++glyph_b; | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | ||
9af3e742 | 1059 | #endif /* 0 */ |
5f5c8ee5 | 1060 | |
015137db EZ |
1061 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1062 | exchange the used[] array and the hash values of the rows, because | |
1063 | these should all go together for the row's hash value to be | |
1064 | correct. */ | |
5f5c8ee5 | 1065 | |
55d4c1b2 | 1066 | static inline void |
971de7fb | 1067 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1068 | { |
1069 | int i; | |
015137db EZ |
1070 | unsigned hash_tem = a->hash; |
1071 | ||
5f5c8ee5 GM |
1072 | for (i = 0; i < LAST_AREA + 1; ++i) |
1073 | { | |
1074 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1075 | |
5f5c8ee5 GM |
1076 | a->glyphs[i] = b->glyphs[i]; |
1077 | b->glyphs[i] = temp; | |
73055685 EZ |
1078 | if (i < LAST_AREA) |
1079 | { | |
1080 | short used_tem = a->used[i]; | |
1081 | ||
1082 | a->used[i] = b->used[i]; | |
1083 | b->used[i] = used_tem; | |
1084 | } | |
5f5c8ee5 | 1085 | } |
015137db EZ |
1086 | a->hash = b->hash; |
1087 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1088 | } |
1089 | ||
1090 | ||
1091 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1092 | that glyph pointers, the `used' counts, and the hash values in the |
1093 | structures are left unchanged. */ | |
5f5c8ee5 | 1094 | |
55d4c1b2 | 1095 | static inline void |
971de7fb | 1096 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1097 | { |
1098 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1099 | short used[LAST_AREA]; |
015137db | 1100 | unsigned hashval; |
5f5c8ee5 GM |
1101 | |
1102 | /* Save glyph pointers of TO. */ | |
72af86bd | 1103 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1104 | memcpy (used, to->used, sizeof to->used); |
1105 | hashval = to->hash; | |
5f5c8ee5 GM |
1106 | |
1107 | /* Do a structure assignment. */ | |
1108 | *to = *from; | |
1109 | ||
1110 | /* Restore original pointers of TO. */ | |
72af86bd | 1111 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1112 | memcpy (to->used, used, sizeof to->used); |
1113 | to->hash = hashval; | |
5f5c8ee5 GM |
1114 | } |
1115 | ||
1116 | ||
5f5c8ee5 GM |
1117 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1118 | assignment TO = FROM, except that glyph pointers are not copied but | |
1119 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1120 | a memory leak. */ | |
1121 | ||
55d4c1b2 | 1122 | static inline void |
971de7fb | 1123 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1124 | { |
1125 | swap_glyph_pointers (to, from); | |
1126 | copy_row_except_pointers (to, from); | |
1127 | } | |
1128 | ||
1129 | ||
1130 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1131 | a row in a window matrix, is a slice of the glyph memory of the | |
1132 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1133 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1134 | memory of FRAME_ROW. */ | |
1135 | ||
e509cfa6 | 1136 | #ifdef GLYPH_DEBUG |
9339e87f | 1137 | |
5f5c8ee5 | 1138 | static int |
59fc5cf9 | 1139 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1140 | { |
1141 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1142 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1143 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1144 | ||
1145 | return (frame_glyph_start <= window_glyph_start | |
1146 | && window_glyph_start < frame_glyph_end); | |
1147 | } | |
1148 | ||
9339e87f | 1149 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1150 | |
9af3e742 GM |
1151 | #if 0 |
1152 | ||
5f5c8ee5 GM |
1153 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1154 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1155 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1156 | ||
1157 | static struct glyph_row * | |
59fc5cf9 AS |
1158 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1159 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1160 | { |
1161 | int i; | |
1162 | ||
a54e2c05 | 1163 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1164 | |
1165 | for (i = 0; i < window_matrix->nrows; ++i) | |
1166 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1167 | frame_matrix->rows + row)) | |
1168 | break; | |
1169 | ||
1170 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1171 | } | |
1172 | ||
9af3e742 | 1173 | #endif /* 0 */ |
5f5c8ee5 GM |
1174 | |
1175 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1176 | i.e. they are only marked as to be cleared by setting their | |
1177 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1178 | call to this function really clears it. */ | |
1179 | ||
1180 | void | |
971de7fb | 1181 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1182 | { |
1183 | if (!row->enabled_p) | |
1184 | { | |
dfd153ae | 1185 | int rp = row->reversed_p; |
5009f85e | 1186 | |
5f5c8ee5 GM |
1187 | clear_glyph_row (row); |
1188 | row->enabled_p = 1; | |
5009f85e | 1189 | row->reversed_p = rp; |
5f5c8ee5 GM |
1190 | } |
1191 | } | |
1192 | ||
1193 | ||
1194 | /* Return a hash code for glyph row ROW. */ | |
1195 | ||
2f7c71a1 | 1196 | static int |
971de7fb | 1197 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1198 | { |
1199 | int hash = 0; | |
177c0ea7 | 1200 | |
5f5c8ee5 GM |
1201 | if (row->enabled_p) |
1202 | { | |
4cecaab8 MB |
1203 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1204 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1205 | ||
1206 | while (glyph < end) | |
1207 | { | |
1208 | int c = glyph->u.ch; | |
1209 | int face_id = glyph->face_id; | |
daf01701 | 1210 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1211 | c -= SPACEGLYPH; |
1212 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1213 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1214 | ++glyph; | |
1215 | } | |
5f5c8ee5 | 1216 | |
4cecaab8 MB |
1217 | if (hash == 0) |
1218 | hash = 1; | |
5f5c8ee5 GM |
1219 | } |
1220 | ||
1221 | return hash; | |
1222 | } | |
1223 | ||
1224 | ||
153a073c | 1225 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1226 | the number of characters in the line. If must_write_spaces is |
1227 | zero, leading and trailing spaces are ignored. */ | |
1228 | ||
dfd153ae | 1229 | static int |
971de7fb | 1230 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1231 | { |
1232 | struct glyph_row *row = matrix->rows + vpos; | |
1233 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1234 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1235 | int len; | |
1236 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1237 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1238 | |
1239 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1240 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1241 | { |
1242 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1243 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1244 | --end; |
1245 | ||
177c0ea7 | 1246 | /* All blank line. */ |
5f5c8ee5 GM |
1247 | if (end == beg) |
1248 | return 0; | |
1249 | ||
1250 | /* Skip over leading spaces. */ | |
1251 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1252 | ++beg; | |
1253 | } | |
1254 | ||
1255 | /* If we don't have a glyph-table, each glyph is one character, | |
1256 | so return the number of glyphs. */ | |
1257 | if (glyph_table_base == 0) | |
1258 | len = end - beg; | |
1259 | else | |
1260 | { | |
1261 | /* Otherwise, scan the glyphs and accumulate their total length | |
1262 | in LEN. */ | |
1263 | len = 0; | |
1264 | while (beg < end) | |
1265 | { | |
3fc809e2 | 1266 | GLYPH g; |
177c0ea7 | 1267 | |
3fc809e2 KS |
1268 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1269 | ||
565b39a8 | 1270 | if (GLYPH_INVALID_P (g) |
42186983 | 1271 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1272 | len += 1; |
1273 | else | |
1274 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1275 | |
5f5c8ee5 GM |
1276 | ++beg; |
1277 | } | |
1278 | } | |
177c0ea7 | 1279 | |
5f5c8ee5 GM |
1280 | return len; |
1281 | } | |
1282 | ||
1283 | ||
1284 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1285 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1286 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1287 | |
55d4c1b2 | 1288 | static inline int |
6b1f9ba4 | 1289 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 | 1290 | { |
a54e2c05 DA |
1291 | eassert (verify_row_hash (a)); |
1292 | eassert (verify_row_hash (b)); | |
7a7270dd | 1293 | |
5f5c8ee5 GM |
1294 | if (a == b) |
1295 | return 1; | |
1296 | else if (a->hash != b->hash) | |
1297 | return 0; | |
1298 | else | |
1299 | { | |
1300 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1301 | int area; | |
1302 | ||
e4e0bee9 GM |
1303 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1304 | return 0; | |
1305 | ||
5f5c8ee5 GM |
1306 | /* Compare glyphs. */ |
1307 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1308 | { | |
1309 | if (a->used[area] != b->used[area]) | |
1310 | return 0; | |
177c0ea7 | 1311 | |
5f5c8ee5 GM |
1312 | a_glyph = a->glyphs[area]; |
1313 | a_end = a_glyph + a->used[area]; | |
1314 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1315 | |
5f5c8ee5 GM |
1316 | while (a_glyph < a_end |
1317 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1318 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1319 | |
5f5c8ee5 GM |
1320 | if (a_glyph != a_end) |
1321 | return 0; | |
1322 | } | |
1323 | ||
6b61353c KH |
1324 | if (a->fill_line_p != b->fill_line_p |
1325 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1326 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1327 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1328 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1329 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1330 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1331 | || a->right_fringe_offset != b->right_fringe_offset |
1332 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1333 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1334 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1335 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1336 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1337 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1338 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1339 | /* Different partially visible characters on left margin. */ |
1340 | || a->x != b->x | |
1341 | /* Different height. */ | |
1342 | || a->ascent != b->ascent | |
408f5064 GM |
1343 | || a->phys_ascent != b->phys_ascent |
1344 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1345 | || a->visible_height != b->visible_height) |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | return 1; | |
1350 | } | |
1351 | ||
1352 | ||
1353 | \f | |
1354 | /*********************************************************************** | |
1355 | Glyph Pool | |
1356 | ||
1357 | See dispextern.h for an overall explanation of glyph pools. | |
1358 | ***********************************************************************/ | |
1359 | ||
1360 | /* Allocate a glyph_pool structure. The structure returned is | |
1361 | initialized with zeros. The global variable glyph_pool_count is | |
1362 | incremented for each pool allocated. */ | |
1363 | ||
1364 | static struct glyph_pool * | |
971de7fb | 1365 | new_glyph_pool (void) |
5f5c8ee5 | 1366 | { |
23f86fce | 1367 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1368 | |
5f5c8ee5 GM |
1369 | /* For memory leak and double deletion checking. */ |
1370 | ++glyph_pool_count; | |
177c0ea7 | 1371 | |
5f5c8ee5 GM |
1372 | return result; |
1373 | } | |
1374 | ||
1375 | ||
1376 | /* Free a glyph_pool structure POOL. The function may be called with | |
1377 | a null POOL pointer. The global variable glyph_pool_count is | |
1378 | decremented with every pool structure freed. If this count gets | |
1379 | negative, more structures were freed than allocated, i.e. one | |
1380 | structure must have been freed more than once or a bogus pointer | |
1381 | was passed to free_glyph_pool. */ | |
1382 | ||
1383 | static void | |
971de7fb | 1384 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1385 | { |
1386 | if (pool) | |
1387 | { | |
153a073c | 1388 | /* More freed than allocated? */ |
5f5c8ee5 | 1389 | --glyph_pool_count; |
a54e2c05 | 1390 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1391 | |
1392 | xfree (pool->glyphs); | |
1393 | xfree (pool); | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | ||
1398 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1399 | columns we need. This function never shrinks a pool. The only | |
1400 | case in which this would make sense, would be when a frame's size | |
1401 | is changed from a large value to a smaller one. But, if someone | |
1402 | does it once, we can expect that he will do it again. | |
1403 | ||
1404 | Value is non-zero if the pool changed in a way which makes | |
1405 | re-adjusting window glyph matrices necessary. */ | |
1406 | ||
1407 | static int | |
971de7fb | 1408 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1409 | { |
ca9ce8f2 | 1410 | ptrdiff_t needed; |
5f5c8ee5 GM |
1411 | int changed_p; |
1412 | ||
1413 | changed_p = (pool->glyphs == 0 | |
1414 | || matrix_dim.height != pool->nrows | |
1415 | || matrix_dim.width != pool->ncolumns); | |
1416 | ||
1417 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1418 | needed = matrix_dim.width; |
0065d054 PE |
1419 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1420 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1421 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1422 | if (needed > pool->nglyphs) |
1423 | { | |
0065d054 PE |
1424 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1425 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1426 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1427 | memset (pool->glyphs + old_nglyphs, 0, | |
1428 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1429 | } |
1430 | ||
153a073c | 1431 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1432 | to do sanity checks, and (b) the number of columns determines |
1433 | where rows in the frame matrix start---this must be available to | |
1434 | determine pointers to rows of window sub-matrices. */ | |
1435 | pool->nrows = matrix_dim.height; | |
1436 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1437 | |
5f5c8ee5 GM |
1438 | return changed_p; |
1439 | } | |
1440 | ||
1441 | ||
1442 | \f | |
1443 | /*********************************************************************** | |
1444 | Debug Code | |
1445 | ***********************************************************************/ | |
1446 | ||
e509cfa6 | 1447 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1448 | |
a13396c9 | 1449 | |
28d440ab KL |
1450 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1451 | XXX Maybe this should be changed to flush the current terminal instead of | |
1452 | stdout. | |
1453 | */ | |
a13396c9 | 1454 | |
85fece3e PE |
1455 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1456 | ||
a13396c9 | 1457 | void |
59fc5cf9 | 1458 | flush_stdout (void) |
a13396c9 GM |
1459 | { |
1460 | fflush (stdout); | |
1461 | } | |
1462 | ||
1463 | ||
5f5c8ee5 GM |
1464 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1465 | pointer has been lost, e.g. by using a structure assignment between | |
1466 | rows, at least one pointer must occur more than once in the rows of | |
1467 | MATRIX. */ | |
1468 | ||
1469 | void | |
59fc5cf9 | 1470 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1471 | { |
1472 | int i, j; | |
177c0ea7 | 1473 | |
5f5c8ee5 GM |
1474 | for (i = 0; i < matrix->nrows; ++i) |
1475 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1476 | eassert (i == j |
5f5c8ee5 GM |
1477 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1478 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1479 | } | |
1480 | ||
1481 | ||
1482 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1483 | ||
1484 | struct glyph_row * | |
59fc5cf9 | 1485 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1486 | { |
a54e2c05 DA |
1487 | eassert (matrix && matrix->rows); |
1488 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1489 | |
1490 | /* That's really too slow for normal testing because this function | |
1491 | is called almost everywhere. Although---it's still astonishingly | |
1492 | fast, so it is valuable to have for debugging purposes. */ | |
1493 | #if 0 | |
1494 | check_matrix_pointer_lossage (matrix); | |
1495 | #endif | |
177c0ea7 | 1496 | |
5f5c8ee5 GM |
1497 | return matrix->rows + row; |
1498 | } | |
1499 | ||
1500 | ||
1501 | #if 0 /* This function makes invalid assumptions when text is | |
1502 | partially invisible. But it might come handy for debugging | |
1503 | nevertheless. */ | |
1504 | ||
1505 | /* Check invariants that must hold for an up to date current matrix of | |
1506 | window W. */ | |
1507 | ||
1508 | static void | |
59fc5cf9 | 1509 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1510 | { |
1511 | struct glyph_matrix *matrix = w->current_matrix; | |
1512 | int yb = window_text_bottom_y (w); | |
1513 | struct glyph_row *row = matrix->rows; | |
1514 | struct glyph_row *last_text_row = NULL; | |
1515 | struct buffer *saved = current_buffer; | |
1516 | struct buffer *buffer = XBUFFER (w->buffer); | |
1517 | int c; | |
177c0ea7 | 1518 | |
5f5c8ee5 GM |
1519 | /* This can sometimes happen for a fresh window. */ |
1520 | if (matrix->nrows < 2) | |
1521 | return; | |
1522 | ||
1523 | set_buffer_temp (buffer); | |
1524 | ||
1525 | /* Note: last row is always reserved for the mode line. */ | |
1526 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1527 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1528 | { | |
1529 | struct glyph_row *next = row + 1; | |
1530 | ||
1531 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1532 | last_text_row = row; | |
1533 | ||
1534 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1535 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1536 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1537 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1538 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1539 | |
1540 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1541 | have such a position temporarily in case of a minibuffer | |
1542 | displaying something like `[Sole completion]' at its end. */ | |
1543 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1544 | { |
a54e2c05 | 1545 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1546 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1547 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1548 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1549 | } | |
5f5c8ee5 GM |
1550 | |
1551 | /* Check that end position of `row' is equal to start position | |
1552 | of next row. */ | |
1553 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1554 | { | |
a54e2c05 | 1555 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1556 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1557 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1558 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1559 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1560 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1561 | } |
1562 | row = next; | |
1563 | } | |
1564 | ||
a54e2c05 DA |
1565 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1566 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1567 | set_buffer_temp (saved); |
1568 | } | |
1569 | ||
1570 | #endif /* 0 */ | |
1571 | ||
e509cfa6 | 1572 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1573 | |
1574 | ||
1575 | \f | |
1576 | /********************************************************************** | |
1577 | Allocating/ Adjusting Glyph Matrices | |
1578 | **********************************************************************/ | |
1579 | ||
1580 | /* Allocate glyph matrices over a window tree for a frame-based | |
1581 | redisplay | |
1582 | ||
1583 | X and Y are column/row within the frame glyph matrix where | |
1584 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1585 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1586 | function is only interested in the result matrix dimension, and | |
1587 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1588 | |
1589 | The function returns the total width/height of the sub-matrices of | |
1590 | the window tree. If called on a frame root window, the computation | |
1591 | will take the mini-buffer window into account. | |
1592 | ||
1593 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1594 | ||
1595 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1596 | glyph matrices yet, and | |
1597 | ||
1598 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1599 | any window in the tree will be changed or have been changed (see | |
153a073c | 1600 | DIM_ONLY_P) |
5f5c8ee5 GM |
1601 | |
1602 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1603 | function. | |
1604 | ||
1605 | Windows are arranged into chains of windows on the same level | |
1606 | through the next fields of window structures. Such a level can be | |
1607 | either a sequence of horizontally adjacent windows from left to | |
1608 | right, or a sequence of vertically adjacent windows from top to | |
1609 | bottom. Each window in a horizontal sequence can be either a leaf | |
1610 | window or a vertical sequence; a window in a vertical sequence can | |
1611 | be either a leaf or a horizontal sequence. All windows in a | |
1612 | horizontal sequence have the same height, and all windows in a | |
1613 | vertical sequence have the same width. | |
1614 | ||
1615 | This function uses, for historical reasons, a more general | |
1616 | algorithm to determine glyph matrix dimensions that would be | |
1617 | necessary. | |
1618 | ||
1619 | The matrix height of a horizontal sequence is determined by the | |
1620 | maximum height of any matrix in the sequence. The matrix width of | |
1621 | a horizontal sequence is computed by adding up matrix widths of | |
1622 | windows in the sequence. | |
1623 | ||
1624 | |<------- result width ------->| | |
1625 | +---------+----------+---------+ --- | |
1626 | | | | | | | |
1627 | | | | | | |
1628 | +---------+ | | result height | |
1629 | | +---------+ | |
1630 | | | | | |
1631 | +----------+ --- | |
1632 | ||
1633 | The matrix width of a vertical sequence is the maximum matrix width | |
1634 | of any window in the sequence. Its height is computed by adding up | |
1635 | matrix heights of windows in the sequence. | |
1636 | ||
1637 | |<---- result width -->| | |
1638 | +---------+ --- | |
1639 | | | | | |
1640 | | | | | |
1641 | +---------+--+ | | |
1642 | | | | | |
1643 | | | result height | |
1644 | | | | |
1645 | +------------+---------+ | | |
1646 | | | | | |
1647 | | | | | |
1648 | +------------+---------+ --- */ | |
1649 | ||
1650 | /* Bit indicating that a new matrix will be allocated or has been | |
1651 | allocated. */ | |
1652 | ||
1653 | #define NEW_LEAF_MATRIX (1 << 0) | |
1654 | ||
1655 | /* Bit indicating that a matrix will or has changed its location or | |
1656 | size. */ | |
1657 | ||
1658 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1659 | ||
1660 | static struct dim | |
6f704c76 DN |
1661 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1662 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1663 | { |
1664 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1665 | int x0 = x, y0 = y; | |
1666 | int wmax = 0, hmax = 0; | |
1667 | struct dim total; | |
1668 | struct dim dim; | |
1669 | struct window *w; | |
1670 | int in_horz_combination_p; | |
1671 | ||
1672 | /* What combination is WINDOW part of? Compute this once since the | |
1673 | result is the same for all windows in the `next' chain. The | |
1674 | special case of a root window (parent equal to nil) is treated | |
1675 | like a vertical combination because a root window's `next' | |
1676 | points to the mini-buffer window, if any, which is arranged | |
1677 | vertically below other windows. */ | |
1678 | in_horz_combination_p | |
1679 | = (!NILP (XWINDOW (window)->parent) | |
1680 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1681 | ||
1682 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1683 | do |
5f5c8ee5 GM |
1684 | { |
1685 | w = XWINDOW (window); | |
1686 | ||
1687 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1688 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1689 | if (!NILP (w->hchild)) |
177c0ea7 | 1690 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1691 | dim_only_p, |
1692 | window_change_flags); | |
1693 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1694 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1695 | dim_only_p, |
1696 | window_change_flags); | |
1697 | else | |
1698 | { | |
1699 | /* If not already done, allocate sub-matrix structures. */ | |
1700 | if (w->desired_matrix == NULL) | |
1701 | { | |
1702 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1703 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1704 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1705 | } | |
177c0ea7 | 1706 | |
5f5c8ee5 GM |
1707 | /* Width and height MUST be chosen so that there are no |
1708 | holes in the frame matrix. */ | |
5d3cc43c GM |
1709 | dim.width = required_matrix_width (w); |
1710 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1711 | |
1712 | /* Will matrix be re-allocated? */ | |
1713 | if (x != w->desired_matrix->matrix_x | |
1714 | || y != w->desired_matrix->matrix_y | |
1715 | || dim.width != w->desired_matrix->matrix_w | |
1716 | || dim.height != w->desired_matrix->matrix_h | |
1717 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1718 | w->left_margin_cols) |
5f5c8ee5 GM |
1719 | != w->desired_matrix->left_margin_glyphs) |
1720 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1721 | w->right_margin_cols) |
5f5c8ee5 GM |
1722 | != w->desired_matrix->right_margin_glyphs)) |
1723 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1724 | ||
1725 | /* Actually change matrices, if allowed. Do not consider | |
1726 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1727 | may have been changed which we don't now here. We trust | |
1728 | that we only will be called with DIM_ONLY_P != 0 when | |
1729 | necessary. */ | |
1730 | if (!dim_only_p) | |
1731 | { | |
1732 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1733 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | /* If we are part of a horizontal combination, advance x for | |
1738 | windows to the right of W; otherwise advance y for windows | |
1739 | below W. */ | |
1740 | if (in_horz_combination_p) | |
1741 | x += dim.width; | |
177c0ea7 | 1742 | else |
5f5c8ee5 GM |
1743 | y += dim.height; |
1744 | ||
1745 | /* Remember maximum glyph matrix dimensions. */ | |
1746 | wmax = max (wmax, dim.width); | |
1747 | hmax = max (hmax, dim.height); | |
1748 | ||
1749 | /* Next window on same level. */ | |
1750 | window = w->next; | |
1751 | } | |
1752 | while (!NILP (window)); | |
1753 | ||
1754 | /* Set `total' to the total glyph matrix dimension of this window | |
1755 | level. In a vertical combination, the width is the width of the | |
1756 | widest window; the height is the y we finally reached, corrected | |
1757 | by the y we started with. In a horizontal combination, the total | |
1758 | height is the height of the tallest window, and the width is the | |
1759 | x we finally reached, corrected by the x we started with. */ | |
1760 | if (in_horz_combination_p) | |
1761 | { | |
1762 | total.width = x - x0; | |
1763 | total.height = hmax; | |
1764 | } | |
177c0ea7 | 1765 | else |
5f5c8ee5 GM |
1766 | { |
1767 | total.width = wmax; | |
1768 | total.height = y - y0; | |
1769 | } | |
1770 | ||
1771 | return total; | |
1772 | } | |
1773 | ||
1774 | ||
5d3cc43c GM |
1775 | /* Return the required height of glyph matrices for window W. */ |
1776 | ||
2f7c71a1 | 1777 | static int |
971de7fb | 1778 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1779 | { |
1780 | #ifdef HAVE_WINDOW_SYSTEM | |
1781 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1782 | |
5d3cc43c GM |
1783 | if (FRAME_WINDOW_P (f)) |
1784 | { | |
1785 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1786 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1787 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1788 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1789 | /* One partially visible line at the top and |
1790 | bottom of the window. */ | |
1791 | + 2 | |
153a073c | 1792 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1793 | + 2); |
1794 | } | |
1795 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1796 | |
7df02016 | 1797 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1798 | } |
1799 | ||
1800 | ||
1801 | /* Return the required width of glyph matrices for window W. */ | |
1802 | ||
2f7c71a1 | 1803 | static int |
971de7fb | 1804 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1805 | { |
1806 | #ifdef HAVE_WINDOW_SYSTEM | |
1807 | struct frame *f = XFRAME (w->frame); | |
1808 | if (FRAME_WINDOW_P (f)) | |
1809 | { | |
1810 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1811 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1812 | |
5d3cc43c GM |
1813 | /* Compute number of glyphs needed in a glyph row. */ |
1814 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1815 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1816 | /* 2 partially visible columns in the text area. */ |
1817 | + 2 | |
1818 | /* One partially visible column at the right | |
1819 | edge of each marginal area. */ | |
1820 | + 1 + 1); | |
1821 | } | |
1822 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1823 | ||
7df02016 | 1824 | return XINT (w->total_cols); |
5d3cc43c GM |
1825 | } |
1826 | ||
1827 | ||
5f5c8ee5 | 1828 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1829 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1830 | |
5f5c8ee5 | 1831 | static void |
971de7fb | 1832 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1833 | { |
5f5c8ee5 GM |
1834 | while (w) |
1835 | { | |
1836 | if (!NILP (w->vchild)) | |
5d3cc43c | 1837 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1838 | else if (!NILP (w->hchild)) |
5d3cc43c | 1839 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1840 | else |
1841 | { | |
1842 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1843 | struct dim dim; |
1844 | ||
1845 | /* If matrices are not yet allocated, allocate them now. */ | |
1846 | if (w->desired_matrix == NULL) | |
1847 | { | |
1848 | w->desired_matrix = new_glyph_matrix (NULL); | |
1849 | w->current_matrix = new_glyph_matrix (NULL); | |
1850 | } | |
1851 | ||
5d3cc43c GM |
1852 | dim.width = required_matrix_width (w); |
1853 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1854 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1855 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1856 | } | |
177c0ea7 | 1857 | |
5f5c8ee5 GM |
1858 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1859 | } | |
1860 | } | |
1861 | ||
1862 | ||
1863 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1864 | do it for all frames; otherwise do it just for the given frame. | |
1865 | This function must be called when a new frame is created, its size | |
1866 | changes, or its window configuration changes. */ | |
1867 | ||
1868 | void | |
971de7fb | 1869 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1870 | { |
408f5064 GM |
1871 | /* Block input so that expose events and other events that access |
1872 | glyph matrices are not processed while we are changing them. */ | |
1873 | BLOCK_INPUT; | |
1874 | ||
5f5c8ee5 GM |
1875 | if (f) |
1876 | adjust_frame_glyphs (f); | |
1877 | else | |
1878 | { | |
1879 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1880 | |
5f5c8ee5 GM |
1881 | FOR_EACH_FRAME (tail, lisp_frame) |
1882 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1883 | } | |
408f5064 GM |
1884 | |
1885 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1886 | } |
1887 | ||
1888 | ||
1889 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1890 | |
1891 | To be called from init_display. | |
1892 | ||
5f5c8ee5 GM |
1893 | We need a glyph matrix because redraw will happen soon. |
1894 | Unfortunately, window sizes on selected_frame are not yet set to | |
1895 | meaningful values. I believe we can assume that there are only two | |
1896 | windows on the frame---the mini-buffer and the root window. Frame | |
1897 | height and width seem to be correct so far. So, set the sizes of | |
1898 | windows to estimated values. */ | |
1899 | ||
1900 | static void | |
971de7fb | 1901 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1902 | { |
91fb7e1b GM |
1903 | struct frame *sf = SELECTED_FRAME (); |
1904 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1905 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1906 | int frame_lines = FRAME_LINES (sf); |
1907 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1908 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1909 | |
1910 | /* Do it for the root window. */ | |
7df02016 | 1911 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1912 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1913 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1914 | |
1915 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1916 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1917 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1918 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 1919 | |
91fb7e1b | 1920 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1921 | glyphs_initialized_initially_p = 1; |
1922 | } | |
177c0ea7 | 1923 | |
5f5c8ee5 GM |
1924 | |
1925 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1926 | ||
1927 | static void | |
971de7fb | 1928 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1929 | { |
1930 | if (FRAME_WINDOW_P (f)) | |
1931 | adjust_frame_glyphs_for_window_redisplay (f); | |
1932 | else | |
1933 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1934 | |
5f5c8ee5 GM |
1935 | /* Don't forget the message buffer and the buffer for |
1936 | decode_mode_spec. */ | |
1937 | adjust_frame_message_buffer (f); | |
1938 | adjust_decode_mode_spec_buffer (f); | |
1939 | ||
1940 | f->glyphs_initialized_p = 1; | |
1941 | } | |
1942 | ||
075757cc CY |
1943 | /* Return 1 if any window in the tree has nonzero window margins. See |
1944 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1945 | static int | |
971de7fb | 1946 | showing_window_margins_p (struct window *w) |
075757cc CY |
1947 | { |
1948 | while (w) | |
1949 | { | |
1950 | if (!NILP (w->hchild)) | |
1951 | { | |
1952 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1953 | return 1; | |
1954 | } | |
1955 | else if (!NILP (w->vchild)) | |
1956 | { | |
1957 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1958 | return 1; | |
1959 | } | |
1960 | else if (!NILP (w->left_margin_cols) | |
1961 | || !NILP (w->right_margin_cols)) | |
1962 | return 1; | |
3fc809e2 | 1963 | |
075757cc CY |
1964 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1965 | } | |
1966 | return 0; | |
1967 | } | |
1968 | ||
5f5c8ee5 | 1969 | |
c9f00270 GM |
1970 | /* In the window tree with root W, build current matrices of leaf |
1971 | windows from the frame's current matrix. */ | |
1972 | ||
1973 | static void | |
971de7fb | 1974 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1975 | { |
1976 | struct window *w; | |
177c0ea7 | 1977 | |
c9f00270 GM |
1978 | for (; !NILP (window); window = w->next) |
1979 | { | |
1980 | w = XWINDOW (window); | |
177c0ea7 | 1981 | |
c9f00270 GM |
1982 | if (!NILP (w->hchild)) |
1983 | fake_current_matrices (w->hchild); | |
1984 | else if (!NILP (w->vchild)) | |
1985 | fake_current_matrices (w->vchild); | |
1986 | else | |
1987 | { | |
1988 | int i; | |
1989 | struct frame *f = XFRAME (w->frame); | |
1990 | struct glyph_matrix *m = w->current_matrix; | |
1991 | struct glyph_matrix *fm = f->current_matrix; | |
1992 | ||
a54e2c05 DA |
1993 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1994 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1995 | |
c9f00270 GM |
1996 | for (i = 0; i < m->matrix_h; ++i) |
1997 | { | |
1998 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1999 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 2000 | |
a54e2c05 | 2001 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
2002 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
2003 | ||
2004 | r->enabled_p = fr->enabled_p; | |
2005 | if (r->enabled_p) | |
2006 | { | |
2007 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2008 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2009 | r->used[TEXT_AREA] = (m->matrix_w | |
2010 | - r->used[LEFT_MARGIN_AREA] | |
2011 | - r->used[RIGHT_MARGIN_AREA]); | |
2012 | r->mode_line_p = 0; | |
c9f00270 GM |
2013 | } |
2014 | } | |
2015 | } | |
2016 | } | |
2017 | } | |
2018 | ||
2019 | ||
bccee4f2 | 2020 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2021 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2022 | |
bccee4f2 | 2023 | static struct glyph_matrix * |
971de7fb | 2024 | save_current_matrix (struct frame *f) |
c9f00270 | 2025 | { |
bccee4f2 | 2026 | int i; |
38182d90 | 2027 | struct glyph_matrix *saved = xzalloc (sizeof *saved); |
bccee4f2 | 2028 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 2029 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2030 | |
2031 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2032 | { |
bccee4f2 GM |
2033 | struct glyph_row *from = f->current_matrix->rows + i; |
2034 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2035 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 2036 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 2037 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2038 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2039 | } |
bccee4f2 GM |
2040 | |
2041 | return saved; | |
2042 | } | |
2043 | ||
2044 | ||
2045 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2046 | and free memory associated with SAVED. */ | |
2047 | ||
2048 | static void | |
971de7fb | 2049 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2050 | { |
2051 | int i; | |
2052 | ||
2053 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2054 | { |
bccee4f2 GM |
2055 | struct glyph_row *from = saved->rows + i; |
2056 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2057 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2058 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2059 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2060 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2061 | } |
177c0ea7 | 2062 | |
bccee4f2 GM |
2063 | xfree (saved->rows); |
2064 | xfree (saved); | |
c9f00270 GM |
2065 | } |
2066 | ||
2067 | ||
bccee4f2 | 2068 | |
5f5c8ee5 GM |
2069 | /* Allocate/reallocate glyph matrices of a single frame F for |
2070 | frame-based redisplay. */ | |
2071 | ||
2072 | static void | |
971de7fb | 2073 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2074 | { |
5f5c8ee5 GM |
2075 | struct dim matrix_dim; |
2076 | int pool_changed_p; | |
2077 | int window_change_flags; | |
2078 | int top_window_y; | |
2079 | ||
2080 | if (!FRAME_LIVE_P (f)) | |
2081 | return; | |
2082 | ||
5f5c8ee5 GM |
2083 | top_window_y = FRAME_TOP_MARGIN (f); |
2084 | ||
2085 | /* Allocate glyph pool structures if not already done. */ | |
2086 | if (f->desired_pool == NULL) | |
2087 | { | |
2088 | f->desired_pool = new_glyph_pool (); | |
2089 | f->current_pool = new_glyph_pool (); | |
2090 | } | |
2091 | ||
2092 | /* Allocate frames matrix structures if needed. */ | |
2093 | if (f->desired_matrix == NULL) | |
2094 | { | |
2095 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2096 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2097 | } | |
177c0ea7 | 2098 | |
5f5c8ee5 GM |
2099 | /* Compute window glyph matrices. (This takes the mini-buffer |
2100 | window into account). The result is the size of the frame glyph | |
2101 | matrix needed. The variable window_change_flags is set to a bit | |
2102 | mask indicating whether new matrices will be allocated or | |
2103 | existing matrices change their size or location within the frame | |
2104 | matrix. */ | |
2105 | window_change_flags = 0; | |
2106 | matrix_dim | |
2107 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2108 | 0, top_window_y, | |
5d3cc43c | 2109 | 1, |
5f5c8ee5 GM |
2110 | &window_change_flags); |
2111 | ||
2112 | /* Add in menu bar lines, if any. */ | |
2113 | matrix_dim.height += top_window_y; | |
2114 | ||
2115 | /* Enlarge pools as necessary. */ | |
2116 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2117 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2118 | ||
177c0ea7 | 2119 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2120 | absolutely necessary since it requires a frame redraw. */ |
2121 | if (pool_changed_p || window_change_flags) | |
2122 | { | |
2123 | /* Do it for window matrices. */ | |
2124 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2125 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2126 | &window_change_flags); |
2127 | ||
2128 | /* Size of frame matrices must equal size of frame. Note | |
2129 | that we are called for X frames with window widths NOT equal | |
2130 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2131 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2132 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2133 | |
e797dea6 GM |
2134 | /* Pointers to glyph memory in glyph rows are exchanged during |
2135 | the update phase of redisplay, which means in general that a | |
2136 | frame's current matrix consists of pointers into both the | |
2137 | desired and current glyph pool of the frame. Adjusting a | |
2138 | matrix sets the frame matrix up so that pointers are all into | |
2139 | the same pool. If we want to preserve glyph contents of the | |
2140 | current matrix over a call to adjust_glyph_matrix, we must | |
2141 | make a copy of the current glyphs, and restore the current | |
2142 | matrix' contents from that copy. */ | |
2143 | if (display_completed | |
2144 | && !FRAME_GARBAGED_P (f) | |
2145 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2146 | && matrix_dim.height == f->current_matrix->matrix_h |
2147 | /* For some reason, the frame glyph matrix gets corrupted if | |
2148 | any of the windows contain margins. I haven't been able | |
2149 | to hunt down the reason, but for the moment this prevents | |
2150 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2151 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2152 | { |
bccee4f2 GM |
2153 | struct glyph_matrix *copy = save_current_matrix (f); |
2154 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2155 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2156 | restore_current_matrix (f, copy); |
e797dea6 GM |
2157 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2158 | } | |
c9f00270 | 2159 | else |
e797dea6 | 2160 | { |
bccee4f2 | 2161 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2162 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2163 | SET_FRAME_GARBAGED (f); | |
2164 | } | |
5f5c8ee5 GM |
2165 | } |
2166 | } | |
2167 | ||
2168 | ||
2169 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2170 | window-based redisplay. */ | |
2171 | ||
2172 | static void | |
971de7fb | 2173 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2174 | { |
a54e2c05 | 2175 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2176 | |
5f5c8ee5 | 2177 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2178 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2179 | |
8ce2650d | 2180 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2181 | /* Allocate/ reallocate matrices of the dummy window used to display |
2182 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2183 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2184 | { |
2185 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2186 | struct window *w; |
5f5c8ee5 GM |
2187 | if (NILP (f->menu_bar_window)) |
2188 | { | |
2189 | f->menu_bar_window = make_window (); | |
2190 | w = XWINDOW (f->menu_bar_window); | |
2191 | XSETFRAME (w->frame, f); | |
2192 | w->pseudo_window_p = 1; | |
2193 | } | |
2194 | else | |
2195 | w = XWINDOW (f->menu_bar_window); | |
2196 | ||
2197 | /* Set window dimensions to frame dimensions and allocate or | |
2198 | adjust glyph matrices of W. */ | |
7df02016 KS |
2199 | XSETFASTINT (w->top_line, 0); |
2200 | XSETFASTINT (w->left_col, 0); | |
2201 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2202 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2203 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2204 | } |
57714a86 YM |
2205 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2206 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2207 | |
488dd4c4 | 2208 | #ifndef USE_GTK |
d2d37ddc PE |
2209 | { |
2210 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2211 | don't have a tool bar window yet, make one. */ | |
2212 | struct window *w; | |
2213 | if (NILP (f->tool_bar_window)) | |
2214 | { | |
2215 | f->tool_bar_window = make_window (); | |
2216 | w = XWINDOW (f->tool_bar_window); | |
2217 | XSETFRAME (w->frame, f); | |
2218 | w->pseudo_window_p = 1; | |
2219 | } | |
2220 | else | |
9ea173e8 | 2221 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2222 | |
d2d37ddc PE |
2223 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2224 | XSETFASTINT (w->left_col, 0); | |
2225 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2226 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2227 | allocate_matrices_for_window_redisplay (w); | |
2228 | } | |
488dd4c4 | 2229 | #endif |
5f5c8ee5 GM |
2230 | } |
2231 | ||
2232 | ||
177c0ea7 | 2233 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2234 | |
5f5c8ee5 GM |
2235 | Note that the message buffer is never freed. Since I could not |
2236 | find a free in 19.34, I assume that freeing it would be | |
2237 | problematic in some way and don't do it either. | |
2238 | ||
2239 | (Implementation note: It should be checked if we can free it | |
2240 | eventually without causing trouble). */ | |
2241 | ||
2242 | static void | |
971de7fb | 2243 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2244 | { |
38182d90 PE |
2245 | FRAME_MESSAGE_BUF (f) = xrealloc (FRAME_MESSAGE_BUF (f), |
2246 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2247 | } |
2248 | ||
2249 | ||
2250 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2251 | ||
2252 | static void | |
971de7fb | 2253 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 | 2254 | { |
38182d90 PE |
2255 | f->decode_mode_spec_buffer = xrealloc (f->decode_mode_spec_buffer, |
2256 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
5f5c8ee5 GM |
2257 | } |
2258 | ||
2259 | ||
2260 | \f | |
2261 | /********************************************************************** | |
2262 | Freeing Glyph Matrices | |
2263 | **********************************************************************/ | |
2264 | ||
2265 | /* Free glyph memory for a frame F. F may be null. This function can | |
2266 | be called for the same frame more than once. The root window of | |
2267 | F may be nil when this function is called. This is the case when | |
2268 | the function is called when F is destroyed. */ | |
2269 | ||
2270 | void | |
971de7fb | 2271 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2272 | { |
2273 | if (f && f->glyphs_initialized_p) | |
2274 | { | |
42f55fe0 GM |
2275 | /* Block interrupt input so that we don't get surprised by an X |
2276 | event while we're in an inconsistent state. */ | |
2277 | BLOCK_INPUT; | |
5f5c8ee5 | 2278 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2279 | |
5f5c8ee5 GM |
2280 | /* Release window sub-matrices. */ |
2281 | if (!NILP (f->root_window)) | |
2282 | free_window_matrices (XWINDOW (f->root_window)); | |
2283 | ||
2284 | /* Free the dummy window for menu bars without X toolkit and its | |
2285 | glyph matrices. */ | |
2286 | if (!NILP (f->menu_bar_window)) | |
2287 | { | |
2288 | struct window *w = XWINDOW (f->menu_bar_window); | |
2289 | free_glyph_matrix (w->desired_matrix); | |
2290 | free_glyph_matrix (w->current_matrix); | |
2291 | w->desired_matrix = w->current_matrix = NULL; | |
2292 | f->menu_bar_window = Qnil; | |
2293 | } | |
2294 | ||
9ea173e8 GM |
2295 | /* Free the tool bar window and its glyph matrices. */ |
2296 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2297 | { |
9ea173e8 | 2298 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2299 | free_glyph_matrix (w->desired_matrix); |
2300 | free_glyph_matrix (w->current_matrix); | |
2301 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2302 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2303 | } |
2304 | ||
2305 | /* Release frame glyph matrices. Reset fields to zero in | |
2306 | case we are called a second time. */ | |
2307 | if (f->desired_matrix) | |
2308 | { | |
2309 | free_glyph_matrix (f->desired_matrix); | |
2310 | free_glyph_matrix (f->current_matrix); | |
2311 | f->desired_matrix = f->current_matrix = NULL; | |
2312 | } | |
2313 | ||
2314 | /* Release glyph pools. */ | |
2315 | if (f->desired_pool) | |
2316 | { | |
2317 | free_glyph_pool (f->desired_pool); | |
2318 | free_glyph_pool (f->current_pool); | |
2319 | f->desired_pool = f->current_pool = NULL; | |
2320 | } | |
177c0ea7 | 2321 | |
42f55fe0 | 2322 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2323 | } |
2324 | } | |
2325 | ||
2326 | ||
2327 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2328 | function may be called with a null pointer, and it may be called on | |
2329 | the same tree more than once. */ | |
2330 | ||
2331 | void | |
971de7fb | 2332 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2333 | { |
2334 | while (w) | |
2335 | { | |
2336 | if (!NILP (w->hchild)) | |
2337 | free_window_matrices (XWINDOW (w->hchild)); | |
2338 | else if (!NILP (w->vchild)) | |
2339 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2340 | else |
5f5c8ee5 GM |
2341 | { |
2342 | /* This is a leaf window. Free its memory and reset fields | |
2343 | to zero in case this function is called a second time for | |
2344 | W. */ | |
2345 | free_glyph_matrix (w->current_matrix); | |
2346 | free_glyph_matrix (w->desired_matrix); | |
2347 | w->current_matrix = w->desired_matrix = NULL; | |
2348 | } | |
2349 | ||
2350 | /* Next window on same level. */ | |
2351 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2352 | } | |
2353 | } | |
2354 | ||
2355 | ||
2356 | /* Check glyph memory leaks. This function is called from | |
2357 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2358 | exits. We therefore free all glyph memory for all active frames | |
2359 | explicitly and check that nothing is left allocated. */ | |
2360 | ||
2361 | void | |
971de7fb | 2362 | check_glyph_memory (void) |
5f5c8ee5 GM |
2363 | { |
2364 | Lisp_Object tail, frame; | |
2365 | ||
2366 | /* Free glyph memory for all frames. */ | |
2367 | FOR_EACH_FRAME (tail, frame) | |
2368 | free_glyphs (XFRAME (frame)); | |
2369 | ||
2370 | /* Check that nothing is left allocated. */ | |
2371 | if (glyph_matrix_count) | |
2372 | abort (); | |
2373 | if (glyph_pool_count) | |
2374 | abort (); | |
2375 | } | |
2376 | ||
2377 | ||
2378 | \f | |
2379 | /********************************************************************** | |
2380 | Building a Frame Matrix | |
2381 | **********************************************************************/ | |
2382 | ||
2383 | /* Most of the redisplay code works on glyph matrices attached to | |
2384 | windows. This is a good solution most of the time, but it is not | |
2385 | suitable for terminal code. Terminal output functions cannot rely | |
2386 | on being able to set an arbitrary terminal window. Instead they | |
2387 | must be provided with a view of the whole frame, i.e. the whole | |
2388 | screen. We build such a view by constructing a frame matrix from | |
2389 | window matrices in this section. | |
2390 | ||
2391 | Windows that must be updated have their must_be_update_p flag set. | |
2392 | For all such windows, their desired matrix is made part of the | |
2393 | desired frame matrix. For other windows, their current matrix is | |
2394 | made part of the desired frame matrix. | |
2395 | ||
2396 | +-----------------+----------------+ | |
2397 | | desired | desired | | |
2398 | | | | | |
2399 | +-----------------+----------------+ | |
2400 | | current | | |
2401 | | | | |
2402 | +----------------------------------+ | |
2403 | ||
2404 | Desired window matrices can be made part of the frame matrix in a | |
2405 | cheap way: We exploit the fact that the desired frame matrix and | |
2406 | desired window matrices share their glyph memory. This is not | |
2407 | possible for current window matrices. Their glyphs are copied to | |
2408 | the desired frame matrix. The latter is equivalent to | |
2409 | preserve_other_columns in the old redisplay. | |
2410 | ||
2411 | Used glyphs counters for frame matrix rows are the result of adding | |
2412 | up glyph lengths of the window matrices. A line in the frame | |
2413 | matrix is enabled, if a corresponding line in a window matrix is | |
2414 | enabled. | |
177c0ea7 | 2415 | |
5f5c8ee5 GM |
2416 | After building the desired frame matrix, it will be passed to |
2417 | terminal code, which will manipulate both the desired and current | |
2418 | frame matrix. Changes applied to the frame's current matrix have | |
2419 | to be visible in current window matrices afterwards, of course. | |
2420 | ||
2421 | This problem is solved like this: | |
2422 | ||
2423 | 1. Window and frame matrices share glyphs. Window matrices are | |
2424 | constructed in a way that their glyph contents ARE the glyph | |
2425 | contents needed in a frame matrix. Thus, any modification of | |
2426 | glyphs done in terminal code will be reflected in window matrices | |
2427 | automatically. | |
177c0ea7 | 2428 | |
5f5c8ee5 GM |
2429 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2430 | intercepted by hook functions so that corresponding row operations | |
2431 | on window matrices can be performed. This is necessary because we | |
2432 | use pointers to glyphs in glyph row structures. To satisfy the | |
2433 | assumption of point 1 above that glyphs are updated implicitly in | |
2434 | window matrices when they are manipulated via the frame matrix, | |
2435 | window and frame matrix must of course agree where to find the | |
2436 | glyphs for their rows. Possible manipulations that must be | |
2437 | mirrored are assignments of rows of the desired frame matrix to the | |
2438 | current frame matrix and scrolling the current frame matrix. */ | |
2439 | ||
2440 | /* Build frame F's desired matrix from window matrices. Only windows | |
2441 | which have the flag must_be_updated_p set have to be updated. Menu | |
2442 | bar lines of a frame are not covered by window matrices, so make | |
2443 | sure not to touch them in this function. */ | |
2444 | ||
2445 | static void | |
971de7fb | 2446 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2447 | { |
2448 | int i; | |
2449 | ||
2450 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2451 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2452 | |
5f5c8ee5 GM |
2453 | /* Clear all rows in the frame matrix covered by window matrices. |
2454 | Menu bar lines are not covered by windows. */ | |
2455 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2456 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2457 | ||
2458 | /* Build the matrix by walking the window tree. */ | |
2459 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2460 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2461 | } | |
2462 | ||
2463 | ||
2464 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2465 | matrices. W is the root of a window tree. */ | |
2466 | ||
2467 | static void | |
971de7fb | 2468 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2469 | { |
2470 | while (w) | |
2471 | { | |
2472 | if (!NILP (w->hchild)) | |
2473 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2474 | else if (!NILP (w->vchild)) | |
2475 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2476 | else | |
2477 | build_frame_matrix_from_leaf_window (matrix, w); | |
2478 | ||
2479 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2480 | } | |
2481 | } | |
2482 | ||
2483 | ||
2484 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2485 | desired frame matrix built. W is a leaf window whose desired or | |
2486 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2487 | must_be_updated_p determines which matrix it contributes to | |
2488 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2489 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2490 | Adding a desired matrix means setting up used counters and such in | |
2491 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2492 | means copying glyphs. The latter case corresponds to | |
2493 | preserve_other_columns in the old redisplay. */ | |
2494 | ||
2495 | static void | |
971de7fb | 2496 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2497 | { |
2498 | struct glyph_matrix *window_matrix; | |
2499 | int window_y, frame_y; | |
2500 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2501 | GLYPH right_border_glyph; |
2502 | ||
2503 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2504 | |
2505 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2506 | if (w->must_be_updated_p) | |
2507 | { | |
2508 | window_matrix = w->desired_matrix; | |
2509 | ||
2510 | /* Decide whether we want to add a vertical border glyph. */ | |
2511 | if (!WINDOW_RIGHTMOST_P (w)) | |
2512 | { | |
2513 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2514 | Lisp_Object gc; |
b4e49aee | 2515 | |
3fc809e2 KS |
2516 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2517 | if (dp | |
d311d28c | 2518 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2519 | { |
2520 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2521 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2522 | } | |
b4e49aee | 2523 | |
3fc809e2 KS |
2524 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2525 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2526 | } |
2527 | } | |
2528 | else | |
2529 | window_matrix = w->current_matrix; | |
2530 | ||
2531 | /* For all rows in the window matrix and corresponding rows in the | |
2532 | frame matrix. */ | |
2533 | window_y = 0; | |
2534 | frame_y = window_matrix->matrix_y; | |
2535 | while (window_y < window_matrix->nrows) | |
2536 | { | |
2537 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2538 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2539 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2540 | |
2541 | /* Fill up the frame row with spaces up to the left margin of the | |
2542 | window row. */ | |
2543 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2544 | ||
2545 | /* Fill up areas in the window matrix row with spaces. */ | |
2546 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2547 | |
2548 | /* If only part of W's desired matrix has been built, and | |
2549 | window_row wasn't displayed, use the corresponding current | |
2550 | row instead. */ | |
2551 | if (window_matrix == w->desired_matrix | |
2552 | && !window_row->enabled_p) | |
2553 | { | |
2554 | window_row = w->current_matrix->rows + window_y; | |
2555 | current_row_p = 1; | |
2556 | } | |
177c0ea7 | 2557 | |
2a8bd25f | 2558 | if (current_row_p) |
5f5c8ee5 | 2559 | { |
2a8bd25f | 2560 | /* Copy window row to frame row. */ |
72af86bd AS |
2561 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2562 | window_row->glyphs[0], | |
2563 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2564 | } |
2565 | else | |
2566 | { | |
a54e2c05 | 2567 | eassert (window_row->enabled_p); |
177c0ea7 | 2568 | |
2a8bd25f GM |
2569 | /* Only when a desired row has been displayed, we want |
2570 | the corresponding frame row to be updated. */ | |
2571 | frame_row->enabled_p = 1; | |
177c0ea7 | 2572 | |
5f5c8ee5 GM |
2573 | /* Maybe insert a vertical border between horizontally adjacent |
2574 | windows. */ | |
3fc809e2 | 2575 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2576 | { |
2577 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2578 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2579 | } | |
2580 | ||
e509cfa6 | 2581 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2582 | /* Window row window_y must be a slice of frame row |
2583 | frame_y. */ | |
a54e2c05 | 2584 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2585 | |
5f5c8ee5 GM |
2586 | /* If rows are in sync, we don't have to copy glyphs because |
2587 | frame and window share glyphs. */ | |
177c0ea7 | 2588 | |
a38634ff | 2589 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2590 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2591 | #endif |
5f5c8ee5 GM |
2592 | } |
2593 | ||
2594 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2595 | up with spaces, and visit leaf windows from left to right it | |
2596 | can be done simply. */ | |
177c0ea7 | 2597 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2598 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2599 | ||
5f5c8ee5 GM |
2600 | /* Next row. */ |
2601 | ++window_y; | |
2602 | ++frame_y; | |
2603 | } | |
2604 | } | |
2605 | ||
5f81871e RS |
2606 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2607 | ID, return a glyph that has a realized face ID. | |
2608 | This is used for glyphs displayed specially and not part of the text; | |
2609 | for instance, vertical separators, truncation markers, etc. */ | |
2610 | ||
3fc809e2 | 2611 | void |
971de7fb | 2612 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2613 | { |
3fc809e2 | 2614 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2615 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2616 | if (lface_id > 0) | |
2617 | { | |
2618 | int face_id = merge_faces (XFRAME (w->frame), | |
2619 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2620 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2621 | } |
5f81871e | 2622 | } |
5f5c8ee5 GM |
2623 | |
2624 | /* Add spaces to a glyph row ROW in a window matrix. | |
2625 | ||
2626 | Each row has the form: | |
2627 | ||
2628 | +---------+-----------------------------+------------+ | |
2629 | | left | text | right | | |
2630 | +---------+-----------------------------+------------+ | |
2631 | ||
2632 | Left and right marginal areas are optional. This function adds | |
2633 | spaces to areas so that there are no empty holes between areas. | |
2634 | In other words: If the right area is not empty, the text area | |
2635 | is filled up with spaces up to the right area. If the text area | |
2636 | is not empty, the left area is filled up. | |
2637 | ||
2638 | To be called for frame-based redisplay, only. */ | |
2639 | ||
2640 | static void | |
971de7fb | 2641 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2642 | { |
2643 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2644 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2645 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2646 | } | |
2647 | ||
2648 | ||
2649 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2650 | frame-based redisplay only. */ | |
2651 | ||
2652 | static void | |
971de7fb | 2653 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2654 | { |
2655 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2656 | { | |
2657 | struct glyph *end = row->glyphs[area + 1]; | |
2658 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2659 | ||
2660 | while (text < end) | |
2661 | *text++ = space_glyph; | |
2662 | row->used[area] = text - row->glyphs[area]; | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | ||
2667 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2668 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2669 | ||
2670 | static void | |
971de7fb | 2671 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2672 | { |
2673 | int i = row->used[TEXT_AREA]; | |
2674 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2675 | |
5f5c8ee5 GM |
2676 | while (i < upto) |
2677 | glyph[i++] = space_glyph; | |
2678 | ||
2679 | row->used[TEXT_AREA] = i; | |
2680 | } | |
2681 | ||
2682 | ||
2683 | \f | |
2684 | /********************************************************************** | |
2685 | Mirroring operations on frame matrices in window matrices | |
2686 | **********************************************************************/ | |
2687 | ||
2688 | /* Set frame being updated via frame-based redisplay to F. This | |
2689 | function must be called before updates to make explicit that we are | |
2690 | working on frame matrices or not. */ | |
2691 | ||
55d4c1b2 | 2692 | static inline void |
971de7fb | 2693 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2694 | { |
2695 | frame_matrix_frame = f; | |
2696 | } | |
2697 | ||
2698 | ||
2699 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2700 | DESIRED_MATRIX is the desired matrix corresponding to | |
2701 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2702 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2703 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2704 | done in frame matrices, and that we have to perform analogous | |
2705 | operations in window matrices of frame_matrix_frame. */ | |
2706 | ||
55d4c1b2 | 2707 | static inline void |
971de7fb | 2708 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2709 | { |
2710 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2711 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2712 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2713 | |
2714 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2715 | between both rows, and does a structure assignment otherwise. */ | |
2716 | assign_row (current_row, desired_row); | |
2717 | ||
2718 | /* Enable current_row to mark it as valid. */ | |
2719 | current_row->enabled_p = 1; | |
e876ff42 | 2720 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2721 | |
2722 | /* If we are called on frame matrices, perform analogous operations | |
2723 | for window matrices. */ | |
2724 | if (frame_matrix_frame) | |
2725 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2726 | } | |
2727 | ||
2728 | ||
2729 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2730 | W's frame which has been made current (by swapping pointers between | |
2731 | current and desired matrix). Perform analogous operations in the | |
2732 | matrices of leaf windows in the window tree rooted at W. */ | |
2733 | ||
2734 | static void | |
971de7fb | 2735 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2736 | { |
2737 | while (w) | |
2738 | { | |
2739 | if (!NILP (w->hchild)) | |
2740 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2741 | else if (!NILP (w->vchild)) | |
2742 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2743 | else | |
2744 | { | |
2745 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2746 | here because the checks performed in debug mode there | |
2747 | will not allow the conversion. */ | |
2748 | int row = frame_row - w->desired_matrix->matrix_y; | |
2749 | ||
2750 | /* If FRAME_ROW is within W, assign the desired row to the | |
2751 | current row (exchanging glyph pointers). */ | |
2752 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2753 | { | |
2754 | struct glyph_row *current_row | |
2755 | = MATRIX_ROW (w->current_matrix, row); | |
2756 | struct glyph_row *desired_row | |
2757 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2758 | |
2759 | if (desired_row->enabled_p) | |
2760 | assign_row (current_row, desired_row); | |
2761 | else | |
2762 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2763 | current_row->enabled_p = 1; |
d009ae66 EZ |
2764 | |
2765 | /* Set the Y coordinate of the mode/header line's row. | |
2766 | It is needed in draw_row_with_mouse_face to find the | |
2767 | screen coordinates. (Window-based redisplay sets | |
2768 | this in update_window, but no one seems to do that | |
2769 | for frame-based redisplay.) */ | |
2770 | if (current_row->mode_line_p) | |
2771 | current_row->y = row; | |
5f5c8ee5 GM |
2772 | } |
2773 | } | |
177c0ea7 | 2774 | |
5f5c8ee5 GM |
2775 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2776 | } | |
2777 | } | |
2778 | ||
2779 | ||
2780 | /* Perform row dance after scrolling. We are working on the range of | |
2781 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2782 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2783 | row I in the range 0 <= I < NLINES, the index of the original line | |
2784 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2785 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2786 | row 0 <= I < NLINES which is empty. | |
2787 | ||
2788 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2789 | |
5f5c8ee5 | 2790 | void |
6f704c76 DN |
2791 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2792 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2793 | { |
2794 | /* A copy of original rows. */ | |
2795 | struct glyph_row *old_rows; | |
2796 | ||
2797 | /* Rows to assign to. */ | |
2798 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2799 | |
5f5c8ee5 GM |
2800 | int i; |
2801 | ||
2802 | /* Make a copy of the original rows. */ | |
38182d90 | 2803 | old_rows = alloca (nlines * sizeof *old_rows); |
72af86bd | 2804 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2805 | |
2806 | /* Assign new rows, maybe clear lines. */ | |
2807 | for (i = 0; i < nlines; ++i) | |
2808 | { | |
2809 | int enabled_before_p = new_rows[i].enabled_p; | |
2810 | ||
a54e2c05 DA |
2811 | eassert (i + unchanged_at_top < matrix->nrows); |
2812 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2813 | new_rows[i] = old_rows[copy_from[i]]; |
2814 | new_rows[i].enabled_p = enabled_before_p; | |
2815 | ||
2816 | /* RETAINED_P is zero for empty lines. */ | |
2817 | if (!retained_p[copy_from[i]]) | |
2818 | new_rows[i].enabled_p = 0; | |
2819 | } | |
2820 | ||
153a073c | 2821 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2822 | if (frame_matrix_frame) |
2823 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2824 | unchanged_at_top, nlines, copy_from, retained_p); | |
2825 | } | |
2826 | ||
2827 | ||
a13396c9 | 2828 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2829 | the current frame matrix. */ |
a13396c9 GM |
2830 | |
2831 | static void | |
971de7fb | 2832 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2833 | { |
2834 | struct frame *f = XFRAME (w->frame); | |
2835 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2836 | int left, right, x, width; |
a13396c9 | 2837 | |
5cb88111 | 2838 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a54e2c05 DA |
2839 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
2840 | eassert (!FRAME_WINDOW_P (f)); | |
a13396c9 | 2841 | |
7df02016 KS |
2842 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2843 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2844 | x = w->current_matrix->matrix_x; |
2845 | width = w->current_matrix->matrix_w; | |
2846 | ||
a13396c9 GM |
2847 | window_row = w->current_matrix->rows; |
2848 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2849 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2850 | |
5cb88111 | 2851 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2852 | { |
5cb88111 GM |
2853 | window_row->glyphs[LEFT_MARGIN_AREA] |
2854 | = frame_row->glyphs[0] + x; | |
2855 | window_row->glyphs[TEXT_AREA] | |
2856 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2857 | window_row->glyphs[LAST_AREA] | |
2858 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2859 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2860 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2861 | } |
2862 | } | |
2863 | ||
2864 | ||
2865 | /* Return the window in the window tree rooted in W containing frame | |
2866 | row ROW. Value is null if none is found. */ | |
2867 | ||
09ad5a91 | 2868 | static struct window * |
971de7fb | 2869 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2870 | { |
2871 | struct window *found = NULL; | |
177c0ea7 | 2872 | |
a13396c9 GM |
2873 | while (w && !found) |
2874 | { | |
2875 | if (!NILP (w->hchild)) | |
2876 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2877 | else if (!NILP (w->vchild)) | |
2878 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2879 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2880 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2881 | found = w; |
177c0ea7 | 2882 | |
a13396c9 GM |
2883 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2884 | } | |
2885 | ||
2886 | return found; | |
2887 | } | |
2888 | ||
2889 | ||
5f5c8ee5 GM |
2890 | /* Perform a line dance in the window tree rooted at W, after |
2891 | scrolling a frame matrix in mirrored_line_dance. | |
2892 | ||
2893 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2894 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2895 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2896 | I < NLINES, the index of the original line to move to I. This | |
2897 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2898 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2899 | which is empty. */ | |
2900 | ||
2901 | static void | |
971de7fb | 2902 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2903 | { |
2904 | while (w) | |
2905 | { | |
2906 | if (!NILP (w->hchild)) | |
2907 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2908 | nlines, copy_from, retained_p); | |
2909 | else if (!NILP (w->vchild)) | |
2910 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2911 | nlines, copy_from, retained_p); | |
2912 | else | |
2913 | { | |
2914 | /* W is a leaf window, and we are working on its current | |
2915 | matrix m. */ | |
2916 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2917 | int i, sync_p = 0; |
5f5c8ee5 GM |
2918 | struct glyph_row *old_rows; |
2919 | ||
2920 | /* Make a copy of the original rows of matrix m. */ | |
38182d90 | 2921 | old_rows = alloca (m->nrows * sizeof *old_rows); |
72af86bd | 2922 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2923 | |
2924 | for (i = 0; i < nlines; ++i) | |
2925 | { | |
2926 | /* Frame relative line assigned to. */ | |
2927 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2928 | |
5f5c8ee5 GM |
2929 | /* Frame relative line assigned. */ |
2930 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2931 | |
5f5c8ee5 GM |
2932 | /* Window relative line assigned to. */ |
2933 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2934 | |
5f5c8ee5 GM |
2935 | /* Window relative line assigned. */ |
2936 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2937 | |
5f5c8ee5 GM |
2938 | /* Is assigned line inside window? */ |
2939 | int from_inside_window_p | |
2940 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2941 | |
a13396c9 GM |
2942 | /* Is assigned to line inside window? */ |
2943 | int to_inside_window_p | |
2944 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2945 | |
a13396c9 | 2946 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2947 | { |
5f5c8ee5 GM |
2948 | /* Enabled setting before assignment. */ |
2949 | int enabled_before_p; | |
177c0ea7 | 2950 | |
5f5c8ee5 GM |
2951 | /* Do the assignment. The enabled_p flag is saved |
2952 | over the assignment because the old redisplay did | |
2953 | that. */ | |
2954 | enabled_before_p = m->rows[window_to].enabled_p; | |
2955 | m->rows[window_to] = old_rows[window_from]; | |
2956 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2957 | |
5f5c8ee5 GM |
2958 | /* If frame line is empty, window line is empty, too. */ |
2959 | if (!retained_p[copy_from[i]]) | |
2960 | m->rows[window_to].enabled_p = 0; | |
2961 | } | |
a13396c9 GM |
2962 | else if (to_inside_window_p) |
2963 | { | |
2964 | /* A copy between windows. This is an infrequent | |
2965 | case not worth optimizing. */ | |
2966 | struct frame *f = XFRAME (w->frame); | |
2967 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
2968 | struct window *w2; | |
2969 | struct glyph_matrix *m2; | |
2970 | int m2_from; | |
2971 | ||
fe8b8401 | 2972 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2973 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2974 | -nw', FROM_FRAME sometimes has no associated window. | |
2975 | This check avoids a segfault if W2 is null. */ | |
2976 | if (w2) | |
2977 | { | |
2978 | m2 = w2->current_matrix; | |
2979 | m2_from = frame_from - m2->matrix_y; | |
2980 | copy_row_except_pointers (m->rows + window_to, | |
2981 | m2->rows + m2_from); | |
2982 | ||
2983 | /* If frame line is empty, window line is empty, too. */ | |
2984 | if (!retained_p[copy_from[i]]) | |
2985 | m->rows[window_to].enabled_p = 0; | |
2986 | } | |
a13396c9 GM |
2987 | sync_p = 1; |
2988 | } | |
2989 | else if (from_inside_window_p) | |
2990 | sync_p = 1; | |
5f5c8ee5 | 2991 | } |
a13396c9 GM |
2992 | |
2993 | /* If there was a copy between windows, make sure glyph | |
2994 | pointers are in sync with the frame matrix. */ | |
2995 | if (sync_p) | |
2996 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 2997 | |
5f5c8ee5 GM |
2998 | /* Check that no pointers are lost. */ |
2999 | CHECK_MATRIX (m); | |
3000 | } | |
3001 | ||
3002 | /* Next window on same level. */ | |
3003 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | ||
e509cfa6 | 3008 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3009 | |
3010 | /* Check that window and frame matrices agree about their | |
3011 | understanding where glyphs of the rows are to find. For each | |
3012 | window in the window tree rooted at W, check that rows in the | |
3013 | matrices of leaf window agree with their frame matrices about | |
3014 | glyph pointers. */ | |
3015 | ||
85fece3e | 3016 | static void |
59fc5cf9 | 3017 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3018 | { |
3019 | while (w) | |
3020 | { | |
3021 | if (!NILP (w->hchild)) | |
3022 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3023 | else if (!NILP (w->vchild)) | |
3024 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3025 | else | |
60a8948a | 3026 | { |
5f5c8ee5 GM |
3027 | struct frame *f = XFRAME (w->frame); |
3028 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3029 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3030 | } |
177c0ea7 | 3031 | |
5f5c8ee5 GM |
3032 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3033 | } | |
3034 | } | |
3035 | ||
3036 | ||
3037 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3038 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3039 | each row in WINDOW_MATRIX check that it's a slice of the | |
3040 | corresponding frame row. If it isn't, abort. */ | |
3041 | ||
3042 | static void | |
59fc5cf9 AS |
3043 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3044 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3045 | { |
3046 | /* Row number in WINDOW_MATRIX. */ | |
3047 | int i = 0; | |
3048 | ||
3049 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3050 | int j = window_matrix->matrix_y; | |
3051 | ||
177c0ea7 | 3052 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3053 | slice of the row in the frame matrix. If it isn't we didn't |
3054 | mirror an operation on the frame matrix correctly. */ | |
3055 | while (i < window_matrix->nrows) | |
3056 | { | |
3057 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3058 | frame_matrix->rows + j)) | |
3059 | abort (); | |
3060 | ++i, ++j; | |
3061 | } | |
3062 | } | |
3063 | ||
e509cfa6 | 3064 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
3065 | |
3066 | ||
3067 | \f | |
3068 | /********************************************************************** | |
3069 | VPOS and HPOS translations | |
3070 | **********************************************************************/ | |
3071 | ||
e509cfa6 | 3072 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3073 | |
3074 | /* Translate vertical position VPOS which is relative to window W to a | |
3075 | vertical position relative to W's frame. */ | |
3076 | ||
3077 | static int | |
59fc5cf9 | 3078 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3079 | { |
a54e2c05 DA |
3080 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
3081 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 | 3082 | vpos += WINDOW_TOP_EDGE_LINE (w); |
a54e2c05 | 3083 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3084 | return vpos; |
3085 | } | |
3086 | ||
3087 | ||
3088 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3089 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3090 | |
3091 | static int | |
59fc5cf9 | 3092 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3093 | { |
a54e2c05 | 3094 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3095 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3096 | return hpos; |
3097 | } | |
177c0ea7 | 3098 | |
5f5c8ee5 GM |
3099 | #endif /* GLYPH_DEBUG */ |
3100 | ||
3101 | ||
3102 | \f | |
3103 | /********************************************************************** | |
3104 | Redrawing Frames | |
3105 | **********************************************************************/ | |
3106 | ||
a7ca3326 | 3107 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3108 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3109 | (Lisp_Object frame) |
5f5c8ee5 GM |
3110 | { |
3111 | struct frame *f; | |
3112 | ||
b7826503 | 3113 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3114 | f = XFRAME (frame); |
3115 | ||
3116 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3117 | (Implementation note: It still has to be checked why we are | |
3118 | called so early here). */ | |
3119 | if (!glyphs_initialized_initially_p) | |
3120 | return Qnil; | |
3121 | ||
3122 | update_begin (f); | |
3224dac1 | 3123 | #ifdef MSDOS |
f2adda5e | 3124 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3125 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3126 | #endif |
385ed61f | 3127 | clear_frame (f); |
5f5c8ee5 GM |
3128 | clear_current_matrices (f); |
3129 | update_end (f); | |
daf01701 | 3130 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3131 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3132 | windows_or_buffers_changed++; |
3133 | /* Mark all windows as inaccurate, so that every window will have | |
3134 | its redisplay done. */ | |
3135 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3136 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3137 | f->garbaged = 0; | |
3138 | return Qnil; | |
3139 | } | |
3140 | ||
3141 | ||
3142 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3143 | function redraw-frame. */ | |
3144 | ||
3145 | void | |
971de7fb | 3146 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3147 | { |
3148 | Lisp_Object frame; | |
3149 | XSETFRAME (frame, f); | |
3150 | Fredraw_frame (frame); | |
3151 | } | |
3152 | ||
3153 | ||
3154 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3155 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3156 | (void) |
5f5c8ee5 GM |
3157 | { |
3158 | Lisp_Object tail, frame; | |
3159 | ||
3160 | FOR_EACH_FRAME (tail, frame) | |
3161 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3162 | Fredraw_frame (frame); | |
3163 | ||
3164 | return Qnil; | |
3165 | } | |
3166 | ||
3167 | ||
5f5c8ee5 | 3168 | \f |
5f5c8ee5 GM |
3169 | /*********************************************************************** |
3170 | Frame Update | |
3171 | ***********************************************************************/ | |
4588ec20 | 3172 | |
5f5c8ee5 | 3173 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3174 | |
5f5c8ee5 GM |
3175 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3176 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3177 | scrolling. | |
177c0ea7 | 3178 | |
5f5c8ee5 | 3179 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3180 | |
5f5c8ee5 | 3181 | int |
971de7fb | 3182 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3183 | { |
3184 | /* 1 means display has been paused because of pending input. */ | |
3185 | int paused_p; | |
3186 | struct window *root_window = XWINDOW (f->root_window); | |
3187 | ||
a2130dbb KS |
3188 | if (redisplay_dont_pause) |
3189 | force_p = 1; | |
a2130dbb KS |
3190 | else if (NILP (Vredisplay_preemption_period)) |
3191 | force_p = 1; | |
3192 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3193 | { |
d012c62b | 3194 | double p = XFLOATINT (Vredisplay_preemption_period); |
d012c62b | 3195 | |
993d4ab6 KS |
3196 | if (detect_input_pending_ignore_squeezables ()) |
3197 | { | |
3198 | paused_p = 1; | |
3199 | goto do_pause; | |
3200 | } | |
3201 | ||
d35af63c | 3202 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3203 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3204 | preemption_period); | |
d012c62b | 3205 | } |
d012c62b | 3206 | |
5f5c8ee5 | 3207 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3208 | { |
5f5c8ee5 GM |
3209 | /* We are working on window matrix basis. All windows whose |
3210 | flag must_be_updated_p is set have to be updated. */ | |
3211 | ||
3212 | /* Record that we are not working on frame matrices. */ | |
3213 | set_frame_matrix_frame (NULL); | |
3214 | ||
3215 | /* Update all windows in the window tree of F, maybe stopping | |
3216 | when pending input is detected. */ | |
3217 | update_begin (f); | |
3218 | ||
3219 | /* Update the menu bar on X frames that don't have toolkit | |
3220 | support. */ | |
3221 | if (WINDOWP (f->menu_bar_window)) | |
3222 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3223 | ||
3224 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3225 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3226 | { |
9ea173e8 | 3227 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3228 | |
3229 | /* Update tool-bar window. */ | |
3230 | if (w->must_be_updated_p) | |
4588ec20 | 3231 | { |
153a073c PJ |
3232 | Lisp_Object tem; |
3233 | ||
5f5c8ee5 GM |
3234 | update_window (w, 1); |
3235 | w->must_be_updated_p = 0; | |
3236 | ||
3237 | /* Swap tool-bar strings. We swap because we want to | |
3238 | reuse strings. */ | |
9ea173e8 GM |
3239 | tem = f->current_tool_bar_string; |
3240 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3241 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3242 | } |
3243 | } | |
177c0ea7 | 3244 | |
5f5c8ee5 GM |
3245 | |
3246 | /* Update windows. */ | |
3247 | paused_p = update_window_tree (root_window, force_p); | |
3248 | update_end (f); | |
177c0ea7 | 3249 | |
6b61353c | 3250 | /* This flush is a performance bottleneck under X, |
e581a466 | 3251 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3252 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3253 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3254 | if (f->force_flush_display_p) |
e581a466 KL |
3255 | { |
3256 | FRAME_RIF (f)->flush_display (f); | |
3257 | f->force_flush_display_p = 0; | |
3258 | } | |
4588ec20 | 3259 | } |
5f5c8ee5 GM |
3260 | else |
3261 | { | |
3262 | /* We are working on frame matrix basis. Set the frame on whose | |
3263 | frame matrix we operate. */ | |
3264 | set_frame_matrix_frame (f); | |
3265 | ||
868dd24b | 3266 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3267 | build_frame_matrix (f); |
177c0ea7 | 3268 | |
868dd24b GM |
3269 | /* Update the display */ |
3270 | update_begin (f); | |
5f5c8ee5 | 3271 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3272 | update_end (f); |
3273 | ||
7d2f1216 | 3274 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3275 | { |
0b0d3e0b KL |
3276 | if (FRAME_TTY (f)->termscript) |
3277 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3278 | if (FRAME_TERMCAP_P (f)) |
3279 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3280 | } |
868dd24b | 3281 | |
5f5c8ee5 | 3282 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3283 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3284 | check_window_matrix_pointers (root_window); |
3285 | add_frame_display_history (f, paused_p); | |
3286 | #endif | |
5f5c8ee5 GM |
3287 | } |
3288 | ||
993d4ab6 | 3289 | do_pause: |
5f5c8ee5 GM |
3290 | /* Reset flags indicating that a window should be updated. */ |
3291 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3292 | |
868dd24b | 3293 | display_completed = !paused_p; |
5f5c8ee5 | 3294 | return paused_p; |
4588ec20 | 3295 | } |
5f5c8ee5 GM |
3296 | |
3297 | ||
4588ec20 | 3298 | \f |
5f5c8ee5 GM |
3299 | /************************************************************************ |
3300 | Window-based updates | |
3301 | ************************************************************************/ | |
3302 | ||
3303 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3304 | don't stop updating when input is pending. */ | |
3305 | ||
3306 | static int | |
971de7fb | 3307 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3308 | { |
3309 | int paused_p = 0; | |
177c0ea7 | 3310 | |
5f5c8ee5 GM |
3311 | while (w && !paused_p) |
3312 | { | |
3313 | if (!NILP (w->hchild)) | |
3314 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3315 | else if (!NILP (w->vchild)) | |
3316 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3317 | else if (w->must_be_updated_p) | |
3318 | paused_p |= update_window (w, force_p); | |
3319 | ||
3320 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3321 | } | |
3322 | ||
3323 | return paused_p; | |
3324 | } | |
3325 | ||
3326 | ||
3327 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3328 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3329 | ||
3330 | void | |
971de7fb | 3331 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3332 | { |
3333 | if (w->must_be_updated_p) | |
3334 | { | |
3335 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3336 | ||
3337 | /* Record that this is not a frame-based redisplay. */ | |
3338 | set_frame_matrix_frame (NULL); | |
3339 | ||
a2130dbb KS |
3340 | if (redisplay_dont_pause) |
3341 | force_p = 1; | |
a2130dbb KS |
3342 | else if (NILP (Vredisplay_preemption_period)) |
3343 | force_p = 1; | |
3344 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b | 3345 | { |
d012c62b | 3346 | double p = XFLOATINT (Vredisplay_preemption_period); |
d35af63c | 3347 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
e9a9ae03 PE |
3348 | preemption_next_check = add_emacs_time (current_emacs_time (), |
3349 | preemption_period); | |
d012c62b | 3350 | } |
d012c62b | 3351 | |
5f5c8ee5 GM |
3352 | /* Update W. */ |
3353 | update_begin (f); | |
3354 | update_window (w, force_p); | |
3355 | update_end (f); | |
4588ec20 | 3356 | |
5f5c8ee5 GM |
3357 | /* Reset flag in W. */ |
3358 | w->must_be_updated_p = 0; | |
3359 | } | |
3360 | } | |
4588ec20 | 3361 | |
93e023fc | 3362 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3363 | |
408f5064 GM |
3364 | /* Redraw lines from the current matrix of window W that are |
3365 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3366 | ||
3367 | static void | |
971de7fb | 3368 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3369 | { |
d8ee7803 | 3370 | int i; |
fa971ac3 | 3371 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3372 | |
408f5064 GM |
3373 | /* If rows overlapping others have been changed, the rows being |
3374 | overlapped have to be redrawn. This won't draw lines that have | |
3375 | already been drawn in update_window_line because overlapped_p in | |
3376 | desired rows is 0, so after row assignment overlapped_p in | |
3377 | current rows is 0. */ | |
3378 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3379 | { | |
e876ff42 | 3380 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3381 | |
3382 | if (!row->enabled_p) | |
3383 | break; | |
3384 | else if (row->mode_line_p) | |
3385 | continue; | |
177c0ea7 | 3386 | |
408f5064 GM |
3387 | if (row->overlapped_p) |
3388 | { | |
3389 | enum glyph_row_area area; | |
177c0ea7 | 3390 | |
408f5064 GM |
3391 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3392 | { | |
3393 | updated_row = row; | |
3394 | updated_area = area; | |
fa971ac3 KL |
3395 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3396 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3397 | if (row->used[area]) |
fa971ac3 KL |
3398 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3399 | row->used[area]); | |
3400 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3401 | } |
177c0ea7 | 3402 | |
408f5064 GM |
3403 | row->overlapped_p = 0; |
3404 | } | |
3405 | ||
e876ff42 | 3406 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3407 | break; |
3408 | } | |
3409 | } | |
3410 | ||
3411 | ||
3412 | /* Redraw lines from the current matrix of window W that overlap | |
3413 | others. YB is bottom-most y-position in W. */ | |
3414 | ||
3415 | static void | |
971de7fb | 3416 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3417 | { |
3418 | int i, bottom_y; | |
3419 | struct glyph_row *row; | |
fa971ac3 | 3420 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3421 | |
408f5064 GM |
3422 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3423 | { | |
3424 | row = w->current_matrix->rows + i; | |
3425 | ||
3426 | if (!row->enabled_p) | |
3427 | break; | |
3428 | else if (row->mode_line_p) | |
3429 | continue; | |
177c0ea7 | 3430 | |
408f5064 GM |
3431 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3432 | ||
b4b2c2ca | 3433 | if (row->overlapping_p) |
408f5064 | 3434 | { |
41124e06 YM |
3435 | int overlaps = 0; |
3436 | ||
b4b2c2ca | 3437 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3438 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3439 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3440 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3441 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3442 | overlaps |= OVERLAPS_SUCC; | |
3443 | ||
3444 | if (overlaps) | |
3445 | { | |
3446 | if (row->used[LEFT_MARGIN_AREA]) | |
3447 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3448 | ||
3449 | if (row->used[TEXT_AREA]) | |
3450 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3451 | ||
3452 | if (row->used[RIGHT_MARGIN_AREA]) | |
3453 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3454 | ||
c5e87d10 | 3455 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3456 | their display. */ |
3457 | if (overlaps & OVERLAPS_PRED) | |
3458 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3459 | if (overlaps & OVERLAPS_SUCC) | |
3460 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3461 | } | |
408f5064 GM |
3462 | } |
3463 | ||
3464 | if (bottom_y >= yb) | |
3465 | break; | |
3466 | } | |
3467 | } | |
3468 | ||
93e023fc KS |
3469 | #endif /* HAVE_WINDOW_SYSTEM */ |
3470 | ||
408f5064 | 3471 | |
09ad5a91 | 3472 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3473 | |
3474 | /* Check that no row in the current matrix of window W is enabled | |
3475 | which is below what's displayed in the window. */ | |
3476 | ||
09ad5a91 | 3477 | static void |
971de7fb | 3478 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3479 | { |
3480 | int last_seen_p = 0; | |
3481 | int i, yb = window_text_bottom_y (w); | |
3482 | ||
3483 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3484 | { | |
3485 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3486 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3487 | last_seen_p = 1; | |
3488 | else if (last_seen_p && row->enabled_p) | |
3489 | abort (); | |
3490 | } | |
3491 | } | |
3492 | ||
3493 | #endif /* GLYPH_DEBUG */ | |
3494 | ||
3495 | ||
5f5c8ee5 GM |
3496 | /* Update display of window W. FORCE_P non-zero means that we should |
3497 | not stop when detecting pending input. */ | |
3498 | ||
3499 | static int | |
971de7fb | 3500 | update_window (struct window *w, int force_p) |
4588ec20 | 3501 | { |
5f5c8ee5 GM |
3502 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3503 | int paused_p; | |
d012c62b | 3504 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3505 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3506 | #endif |
597cfb3f | 3507 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3508 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3509 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3510 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3511 | #endif |
5f5c8ee5 GM |
3512 | |
3513 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3514 | #if !PERIODIC_PREEMPTION_CHECKING |
3515 | if (!force_p) | |
a2d5fca0 | 3516 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3517 | #endif |
4588ec20 | 3518 | |
5f5c8ee5 GM |
3519 | /* If forced to complete the update, or if no input is pending, do |
3520 | the update. */ | |
8fd9a666 | 3521 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3522 | { |
5f5c8ee5 GM |
3523 | struct glyph_row *row, *end; |
3524 | struct glyph_row *mode_line_row; | |
56974e03 | 3525 | struct glyph_row *header_line_row; |
0bc32927 PE |
3526 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3527 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3528 | int n_updated = 0; | |
3529 | #endif | |
5f5c8ee5 GM |
3530 | |
3531 | rif->update_window_begin_hook (w); | |
3532 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3533 | row = desired_matrix->rows; |
3534 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3535 | |
394305db EZ |
3536 | /* Take note of the header line, if there is one. We will |
3537 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3538 | if (row->mode_line_p) |
56974e03 GM |
3539 | { |
3540 | header_line_row = row; | |
3541 | ++row; | |
3542 | } | |
3543 | else | |
3544 | header_line_row = NULL; | |
5f5c8ee5 GM |
3545 | |
3546 | /* Update the mode line, if necessary. */ | |
3547 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3548 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3549 | { | |
3550 | mode_line_row->y = yb; | |
3551 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3552 | desired_matrix), |
3553 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3554 | } |
3555 | ||
3556 | /* Find first enabled row. Optimizations in redisplay_internal | |
3557 | may lead to an update with only one row enabled. There may | |
3558 | be also completely empty matrices. */ | |
3559 | while (row < end && !row->enabled_p) | |
3560 | ++row; | |
177c0ea7 | 3561 | |
bfdcafe1 | 3562 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3563 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3564 | { |
3565 | int rc = scrolling_window (w, header_line_row != NULL); | |
3566 | if (rc < 0) | |
3567 | { | |
3568 | /* All rows were found to be equal. */ | |
3569 | paused_p = 0; | |
3570 | goto set_cursor; | |
3571 | } | |
3572 | else if (rc > 0) | |
6b61353c KH |
3573 | { |
3574 | /* We've scrolled the display. */ | |
3575 | force_p = 1; | |
3576 | changed_p = 1; | |
3577 | } | |
5f5c8ee5 GM |
3578 | } |
3579 | ||
3580 | /* Update the rest of the lines. */ | |
0bc32927 | 3581 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3582 | /* scrolling_window resets the enabled_p flag of the rows it |
3583 | reuses from current_matrix. */ | |
b7412313 | 3584 | if (row->enabled_p) |
5f5c8ee5 GM |
3585 | { |
3586 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3587 | int i; | |
177c0ea7 | 3588 | |
153a073c | 3589 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3590 | detect_input_pending. If it's done too often, |
3591 | scrolling large windows with repeated scroll-up | |
3592 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3593 | #if PERIODIC_PREEMPTION_CHECKING |
3594 | if (!force_p) | |
3595 | { | |
e9a9ae03 | 3596 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 3597 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 3598 | { |
e9a9ae03 PE |
3599 | preemption_next_check = add_emacs_time (tm, |
3600 | preemption_period); | |
993d4ab6 KS |
3601 | if (detect_input_pending_ignore_squeezables ()) |
3602 | break; | |
d012c62b KS |
3603 | } |
3604 | } | |
3605 | #else | |
e87b8809 | 3606 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3607 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3608 | #endif |
e876ff42 GM |
3609 | changed_p |= update_window_line (w, vpos, |
3610 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3611 | |
3612 | /* Mark all rows below the last visible one in the current | |
3613 | matrix as invalid. This is necessary because of | |
3614 | variable line heights. Consider the case of three | |
3615 | successive redisplays, where the first displays 5 | |
3616 | lines, the second 3 lines, and the third 5 lines again. | |
3617 | If the second redisplay wouldn't mark rows in the | |
3618 | current matrix invalid, the third redisplay might be | |
3619 | tempted to optimize redisplay based on lines displayed | |
3620 | in the first redisplay. */ | |
3621 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3622 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3623 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3624 | } | |
3625 | ||
3626 | /* Was display preempted? */ | |
3627 | paused_p = row < end; | |
177c0ea7 | 3628 | |
56974e03 | 3629 | set_cursor: |
177c0ea7 | 3630 | |
6b61353c KH |
3631 | /* Update the header line after scrolling because a new header |
3632 | line would otherwise overwrite lines at the top of the window | |
3633 | that can be scrolled. */ | |
3634 | if (header_line_row && header_line_row->enabled_p) | |
3635 | { | |
3636 | header_line_row->y = 0; | |
3637 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3638 | } |
3639 | ||
153a073c | 3640 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3641 | if (!paused_p && !w->pseudo_window_p) |
3642 | { | |
93e023fc | 3643 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3644 | if (changed_p && rif->fix_overlapping_area) |
3645 | { | |
3646 | redraw_overlapped_rows (w, yb); | |
3647 | redraw_overlapping_rows (w, yb); | |
3648 | } | |
93e023fc | 3649 | #endif |
177c0ea7 | 3650 | |
5f5c8ee5 GM |
3651 | /* Make cursor visible at cursor position of W. */ |
3652 | set_window_cursor_after_update (w); | |
3653 | ||
e876ff42 GM |
3654 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3655 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3656 | IF_DEBUG (check_matrix_invariants (w)); |
3657 | #endif | |
4588ec20 | 3658 | } |
5f5c8ee5 | 3659 | |
e509cfa6 | 3660 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3661 | /* Remember the redisplay method used to display the matrix. */ |
3662 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3663 | #endif | |
408f5064 | 3664 | |
6b61353c KH |
3665 | #ifdef HAVE_WINDOW_SYSTEM |
3666 | update_window_fringes (w, 0); | |
3667 | #endif | |
3668 | ||
56974e03 GM |
3669 | /* End the update of window W. Don't set the cursor if we |
3670 | paused updating the display because in this case, | |
3671 | set_window_cursor_after_update hasn't been called, and | |
3672 | output_cursor doesn't contain the cursor location. */ | |
3673 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3674 | } |
5f5c8ee5 GM |
3675 | else |
3676 | paused_p = 1; | |
3677 | ||
e509cfa6 | 3678 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3679 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3680 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3681 | #endif | |
177c0ea7 | 3682 | |
5f5c8ee5 | 3683 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3684 | |
5f5c8ee5 | 3685 | return paused_p; |
4588ec20 JB |
3686 | } |
3687 | ||
b64b3980 | 3688 | |
5f5c8ee5 GM |
3689 | /* Update the display of area AREA in window W, row number VPOS. |
3690 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3691 | ||
3692 | static void | |
971de7fb | 3693 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3694 | { |
5f5c8ee5 | 3695 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3696 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3697 | |
3698 | /* Let functions in xterm.c know what area subsequent X positions | |
3699 | will be relative to. */ | |
3700 | updated_area = area; | |
3701 | ||
3702 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3703 | of the area. I don't think that something more sophisticated is | |
3704 | necessary here, since marginal areas will not be the default. */ | |
3705 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3706 | if (desired_row->used[area]) | |
3707 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3708 | rif->clear_end_of_line (-1); | |
b64b3980 | 3709 | } |
23b0200c | 3710 | |
352f1545 | 3711 | |
408f5064 GM |
3712 | /* Update the display of the text area of row VPOS in window W. |
3713 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3714 | |
408f5064 | 3715 | static int |
971de7fb | 3716 | update_text_area (struct window *w, int vpos) |
23b0200c | 3717 | { |
5f5c8ee5 GM |
3718 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3719 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3720 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3721 | int changed_p = 0; |
5f5c8ee5 GM |
3722 | |
3723 | /* Let functions in xterm.c know what area subsequent X positions | |
3724 | will be relative to. */ | |
3725 | updated_area = TEXT_AREA; | |
177c0ea7 | 3726 | |
5f5c8ee5 GM |
3727 | /* If rows are at different X or Y, or rows have different height, |
3728 | or the current row is marked invalid, write the entire line. */ | |
3729 | if (!current_row->enabled_p | |
3730 | || desired_row->y != current_row->y | |
3731 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3732 | || desired_row->phys_ascent != current_row->phys_ascent |
3733 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3734 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3735 | || current_row->overlapped_p |
fee8b690 CY |
3736 | /* This next line is necessary for correctly redrawing |
3737 | mouse-face areas after scrolling and other operations. | |
3738 | However, it causes excessive flickering when mouse is moved | |
3739 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3740 | line doesn't seem to hurt anything. -- cyd. |
3741 | But it is still needed for the header line. -- kfs. */ | |
3742 | || (current_row->mouse_face_p | |
3743 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3744 | || current_row->x != desired_row->x) |
3745 | { | |
3746 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3747 | |
5f5c8ee5 GM |
3748 | if (desired_row->used[TEXT_AREA]) |
3749 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3750 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3751 | |
5f5c8ee5 GM |
3752 | /* Clear to end of window. */ |
3753 | rif->clear_end_of_line (-1); | |
408f5064 | 3754 | changed_p = 1; |
60f2f3f1 GM |
3755 | |
3756 | /* This erases the cursor. We do this here because | |
3757 | notice_overwritten_cursor cannot easily check this, which | |
3758 | might indicate that the whole functionality of | |
3759 | notice_overwritten_cursor would better be implemented here. | |
3760 | On the other hand, we need notice_overwritten_cursor as long | |
3761 | as mouse highlighting is done asynchronously outside of | |
3762 | redisplay. */ | |
3763 | if (vpos == w->phys_cursor.vpos) | |
3764 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3765 | } |
3766 | else | |
3767 | { | |
3768 | int stop, i, x; | |
3769 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3770 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3771 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3772 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3773 | int abort_skipping = 0; |
5f5c8ee5 | 3774 | |
78897758 YM |
3775 | /* If the desired row extends its face to the text area end, and |
3776 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3777 | make sure we write at least one glyph, so that the face |
3778 | extension actually takes place. */ | |
78897758 YM |
3779 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3780 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3781 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3782 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3783 | --desired_stop_pos; |
177c0ea7 | 3784 | |
5f5c8ee5 GM |
3785 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3786 | i = 0; | |
3787 | x = desired_row->x; | |
8399f8a0 GM |
3788 | |
3789 | /* Loop over glyphs that current and desired row may have | |
3790 | in common. */ | |
5f5c8ee5 | 3791 | while (i < stop) |
352f1545 | 3792 | { |
91d227d9 | 3793 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3794 | |
5f5c8ee5 | 3795 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3796 | don't have to be written. We can't skip if the last |
3797 | current glyph overlaps the glyph to its right. For | |
3798 | example, consider a current row of `if ' with the `f' in | |
3799 | Courier bold so that it overlaps the ` ' to its right. | |
3800 | If the desired row is ` ', we would skip over the space | |
3801 | after the `if' and there would remain a pixel from the | |
3802 | `f' on the screen. */ | |
3803 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3804 | { |
e47306e6 GM |
3805 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3806 | int left, right; | |
177c0ea7 | 3807 | |
e47306e6 GM |
3808 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3809 | &left, &right); | |
91d227d9 | 3810 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3811 | } |
177c0ea7 | 3812 | |
6d950f4c | 3813 | if (can_skip_p) |
352f1545 | 3814 | { |
91d227d9 CY |
3815 | int start_hpos = i; |
3816 | ||
6d950f4c GM |
3817 | while (i < stop |
3818 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3819 | { | |
3820 | x += desired_glyph->pixel_width; | |
3821 | ++desired_glyph, ++current_glyph, ++i; | |
3822 | } | |
3823 | ||
3824 | /* Consider the case that the current row contains "xxx | |
3825 | ppp ggg" in italic Courier font, and the desired row | |
3826 | is "xxx ggg". The character `p' has lbearing, `g' | |
3827 | has not. The loop above will stop in front of the | |
3828 | first `p' in the current row. If we would start | |
3829 | writing glyphs there, we wouldn't erase the lbearing | |
3830 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3831 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3832 | if (overlapping_glyphs_p |
3833 | && i > 0 | |
3834 | && i < current_row->used[TEXT_AREA] | |
3835 | && (current_row->used[TEXT_AREA] | |
3836 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3837 | { |
6d950f4c | 3838 | int left, right; |
177c0ea7 | 3839 | |
6d950f4c GM |
3840 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3841 | &left, &right); | |
3842 | while (left > 0 && i > 0) | |
3843 | { | |
3844 | --i, --desired_glyph, --current_glyph; | |
3845 | x -= desired_glyph->pixel_width; | |
3846 | left -= desired_glyph->pixel_width; | |
3847 | } | |
91d227d9 CY |
3848 | |
3849 | /* Abort the skipping algorithm if we end up before | |
3850 | our starting point, to avoid looping (bug#1070). | |
3851 | This can happen when the lbearing is larger than | |
3852 | the pixel width. */ | |
3853 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3854 | } |
352f1545 | 3855 | } |
177c0ea7 | 3856 | |
5f5c8ee5 GM |
3857 | /* Try to avoid writing the entire rest of the desired row |
3858 | by looking for a resync point. This mainly prevents | |
3859 | mode line flickering in the case the mode line is in | |
3860 | fixed-pitch font, which it usually will be. */ | |
3861 | if (i < desired_row->used[TEXT_AREA]) | |
3862 | { | |
3863 | int start_x = x, start_hpos = i; | |
3864 | struct glyph *start = desired_glyph; | |
3865 | int current_x = x; | |
6d950f4c GM |
3866 | int skip_first_p = !can_skip_p; |
3867 | ||
5f5c8ee5 GM |
3868 | /* Find the next glyph that's equal again. */ |
3869 | while (i < stop | |
6d950f4c GM |
3870 | && (skip_first_p |
3871 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3872 | && x == current_x) |
3873 | { | |
3874 | x += desired_glyph->pixel_width; | |
3875 | current_x += current_glyph->pixel_width; | |
3876 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3877 | skip_first_p = 0; |
5f5c8ee5 | 3878 | } |
23b0200c | 3879 | |
5f5c8ee5 GM |
3880 | if (i == start_hpos || x != current_x) |
3881 | { | |
3882 | i = start_hpos; | |
3883 | x = start_x; | |
3884 | desired_glyph = start; | |
3885 | break; | |
3886 | } | |
e47306e6 | 3887 | |
5f5c8ee5 GM |
3888 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3889 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3890 | changed_p = 1; |
5f5c8ee5 GM |
3891 | } |
3892 | } | |
177c0ea7 | 3893 | |
5f5c8ee5 GM |
3894 | /* Write the rest. */ |
3895 | if (i < desired_row->used[TEXT_AREA]) | |
3896 | { | |
3897 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3898 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3899 | changed_p = 1; |
5f5c8ee5 | 3900 | } |
177c0ea7 | 3901 | |
5f5c8ee5 GM |
3902 | /* Maybe clear to end of line. */ |
3903 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3904 | { | |
3905 | /* If new row extends to the end of the text area, nothing | |
3906 | has to be cleared, if and only if we did a write_glyphs | |
3907 | above. This is made sure by setting desired_stop_pos | |
3908 | appropriately above. */ | |
a54e2c05 | 3909 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3910 | || ((desired_row->used[TEXT_AREA] |
3911 | == current_row->used[TEXT_AREA]) | |
3912 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3913 | } |
3914 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3915 | { | |
3916 | /* If old row extends to the end of the text area, clear. */ | |
3917 | if (i >= desired_row->used[TEXT_AREA]) | |
3918 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3919 | desired_row->pixel_width); |
5f5c8ee5 | 3920 | rif->clear_end_of_line (-1); |
408f5064 | 3921 | changed_p = 1; |
5f5c8ee5 GM |
3922 | } |
3923 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3924 | { |
5f5c8ee5 GM |
3925 | /* Otherwise clear to the end of the old row. Everything |
3926 | after that position should be clear already. */ | |
27786b2f | 3927 | int xlim; |
177c0ea7 | 3928 | |
5f5c8ee5 GM |
3929 | if (i >= desired_row->used[TEXT_AREA]) |
3930 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3931 | desired_row->pixel_width); |
5f5c8ee5 GM |
3932 | |
3933 | /* If cursor is displayed at the end of the line, make sure | |
3934 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3935 | with which to erase the cursor (because this method | |
3936 | doesn't work with lbearing/rbearing), so we must do it | |
3937 | this way. */ | |
3938 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3939 | && (desired_row->reversed_p |
3940 | ? (w->phys_cursor.hpos < 0) | |
3941 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3942 | { |
3943 | w->phys_cursor_on_p = 0; | |
27786b2f | 3944 | xlim = -1; |
5f5c8ee5 GM |
3945 | } |
3946 | else | |
27786b2f PE |
3947 | xlim = current_row->pixel_width; |
3948 | rif->clear_end_of_line (xlim); | |
408f5064 | 3949 | changed_p = 1; |
2e8907d3 | 3950 | } |
23b0200c | 3951 | } |
408f5064 GM |
3952 | |
3953 | return changed_p; | |
23b0200c | 3954 | } |
4588ec20 | 3955 | |
5f5c8ee5 | 3956 | |
408f5064 GM |
3957 | /* Update row VPOS in window W. Value is non-zero if display has been |
3958 | changed. */ | |
5f5c8ee5 | 3959 | |
408f5064 | 3960 | static int |
971de7fb | 3961 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
3962 | { |
3963 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3964 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3965 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3966 | int changed_p = 0; |
5f5c8ee5 | 3967 | |
5f5c8ee5 GM |
3968 | /* Set the row being updated. This is important to let xterm.c |
3969 | know what line height values are in effect. */ | |
3970 | updated_row = desired_row; | |
3971 | ||
177c0ea7 JB |
3972 | /* A row can be completely invisible in case a desired matrix was |
3973 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3974 | the matrix. Make sure to make such rows current anyway, since |
3975 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3976 | if (desired_row->mode_line_p |
3977 | || desired_row->visible_height > 0) | |
408f5064 | 3978 | { |
a54e2c05 | 3979 | eassert (desired_row->enabled_p); |
504805ac GM |
3980 | |
3981 | /* Update display of the left margin area, if there is one. */ | |
3982 | if (!desired_row->full_width_p | |
7df02016 | 3983 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3984 | { |
3985 | changed_p = 1; | |
3986 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
3987 | } | |
177c0ea7 | 3988 | |
504805ac GM |
3989 | /* Update the display of the text area. */ |
3990 | if (update_text_area (w, vpos)) | |
3991 | { | |
3992 | changed_p = 1; | |
3993 | if (current_row->mouse_face_p) | |
3994 | *mouse_face_overwritten_p = 1; | |
3995 | } | |
177c0ea7 | 3996 | |
504805ac GM |
3997 | /* Update display of the right margin area, if there is one. */ |
3998 | if (!desired_row->full_width_p | |
7df02016 | 3999 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4000 | { |
4001 | changed_p = 1; | |
4002 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4003 | } | |
177c0ea7 | 4004 | |
504805ac GM |
4005 | /* Draw truncation marks etc. */ |
4006 | if (!current_row->enabled_p | |
4007 | || desired_row->y != current_row->y | |
4008 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4009 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4010 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4011 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4012 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4013 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4014 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4015 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4016 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4017 | } |
177c0ea7 | 4018 | |
5f5c8ee5 GM |
4019 | /* Update current_row from desired_row. */ |
4020 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4021 | updated_row = NULL; | |
408f5064 | 4022 | return changed_p; |
5f5c8ee5 GM |
4023 | } |
4024 | ||
4025 | ||
4026 | /* Set the cursor after an update of window W. This function may only | |
4027 | be called from update_window. */ | |
4028 | ||
4029 | static void | |
971de7fb | 4030 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4031 | { |
5f5c8ee5 | 4032 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4033 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4034 | int cx, cy, vpos, hpos; |
4035 | ||
4036 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 4037 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 4038 | |
b96fd3e8 GM |
4039 | if (cursor_in_echo_area |
4040 | && !NILP (echo_area_buffer[0]) | |
4041 | /* If we are showing a message instead of the mini-buffer, | |
4042 | show the cursor for the message instead. */ | |
4043 | && XWINDOW (minibuf_window) == w | |
4044 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4045 | /* These cases apply only to the frame that contains |
4046 | the active mini-buffer window. */ | |
4047 | && FRAME_HAS_MINIBUF_P (f) | |
4048 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4049 | { | |
4050 | cx = cy = vpos = hpos = 0; | |
4051 | ||
4052 | if (cursor_in_echo_area >= 0) | |
4053 | { | |
4054 | /* If the mini-buffer is several lines high, find the last | |
4055 | line that has any text on it. Note: either all lines | |
4056 | are enabled or none. Otherwise we wouldn't be able to | |
4057 | determine Y. */ | |
862b4790 GM |
4058 | struct glyph_row *row, *last_row; |
4059 | struct glyph *glyph; | |
4060 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4061 | |
862b4790 | 4062 | last_row = NULL; |
6206f8ce GM |
4063 | row = w->current_matrix->rows; |
4064 | while (row->enabled_p | |
4065 | && (last_row == NULL | |
4066 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4067 | { |
862b4790 GM |
4068 | if (row->used[TEXT_AREA] |
4069 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4070 | last_row = row; | |
6206f8ce | 4071 | ++row; |
862b4790 | 4072 | } |
177c0ea7 | 4073 | |
5f5c8ee5 GM |
4074 | if (last_row) |
4075 | { | |
6206f8ce GM |
4076 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4077 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4078 | |
b96fd3e8 | 4079 | while (last > start && last->charpos < 0) |
862b4790 | 4080 | --last; |
177c0ea7 | 4081 | |
862b4790 GM |
4082 | for (glyph = start; glyph < last; ++glyph) |
4083 | { | |
4084 | cx += glyph->pixel_width; | |
4085 | ++hpos; | |
4086 | } | |
4087 | ||
5f5c8ee5 | 4088 | cy = last_row->y; |
862b4790 | 4089 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4090 | } |
4091 | } | |
4092 | } | |
4093 | else | |
4094 | { | |
4095 | cx = w->cursor.x; | |
4096 | cy = w->cursor.y; | |
4097 | hpos = w->cursor.hpos; | |
4098 | vpos = w->cursor.vpos; | |
4099 | } | |
4588ec20 | 4100 | |
5f5c8ee5 | 4101 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4102 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4103 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4104 | vpos = max (0, vpos); | |
4105 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4106 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4107 | } |
4588ec20 | 4108 | |
5f5c8ee5 | 4109 | |
6df5d75f GM |
4110 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4111 | tree rooted at W. */ | |
4112 | ||
4113 | void | |
971de7fb | 4114 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4115 | { |
4116 | while (w) | |
4117 | { | |
4118 | if (!NILP (w->hchild)) | |
4119 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4120 | else if (!NILP (w->vchild)) | |
4121 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4122 | else | |
4123 | w->must_be_updated_p = on_p; | |
4124 | ||
4125 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4126 | } | |
177c0ea7 | 4127 | } |
6df5d75f GM |
4128 | |
4129 | ||
4130 | \f | |
4131 | /*********************************************************************** | |
4132 | Window-Based Scrolling | |
4133 | ***********************************************************************/ | |
4134 | ||
4135 | /* Structure describing rows in scrolling_window. */ | |
4136 | ||
4137 | struct row_entry | |
4138 | { | |
4139 | /* Number of occurrences of this row in desired and current matrix. */ | |
4140 | int old_uses, new_uses; | |
177c0ea7 | 4141 | |
6df5d75f GM |
4142 | /* Vpos of row in new matrix. */ |
4143 | int new_line_number; | |
4144 | ||
4145 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4146 | ptrdiff_t bucket; |
177c0ea7 | 4147 | |
6df5d75f GM |
4148 | /* The row described by this entry. */ |
4149 | struct glyph_row *row; | |
177c0ea7 | 4150 | |
6df5d75f GM |
4151 | /* Hash collision chain. */ |
4152 | struct row_entry *next; | |
4153 | }; | |
4154 | ||
4155 | /* A pool to allocate row_entry structures from, and the size of the | |
4156 | pool. The pool is reallocated in scrolling_window when we find | |
4157 | that we need a larger one. */ | |
4158 | ||
4159 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4160 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4161 | |
4162 | /* Index of next free entry in row_entry_pool. */ | |
4163 | ||
ca9ce8f2 | 4164 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4165 | |
4166 | /* The hash table used during scrolling, and the table's size. This | |
4167 | table is used to quickly identify equal rows in the desired and | |
4168 | current matrix. */ | |
4169 | ||
4170 | static struct row_entry **row_table; | |
ca9ce8f2 | 4171 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4172 | |
4173 | /* Vectors of pointers to row_entry structures belonging to the | |
4174 | current and desired matrix, and the size of the vectors. */ | |
4175 | ||
4176 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4177 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4178 | |
4179 | /* A pool to allocate run structures from, and its size. */ | |
4180 | ||
4181 | static struct run *run_pool; | |
0065d054 | 4182 | static ptrdiff_t runs_size; |
6df5d75f GM |
4183 | |
4184 | /* A vector of runs of lines found during scrolling. */ | |
4185 | ||
4186 | static struct run **runs; | |
4187 | ||
6b1f9ba4 | 4188 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4189 | |
55d4c1b2 | 4190 | static inline struct row_entry * |
6b1f9ba4 | 4191 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4192 | { |
4193 | struct row_entry *entry; | |
ca9ce8f2 | 4194 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4195 | |
6df5d75f | 4196 | entry = row_table[i]; |
a54e2c05 | 4197 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4198 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4199 | entry = entry->next; |
177c0ea7 | 4200 | |
6df5d75f GM |
4201 | if (entry == NULL) |
4202 | { | |
4203 | entry = row_entry_pool + row_entry_idx++; | |
4204 | entry->row = row; | |
4205 | entry->old_uses = entry->new_uses = 0; | |
4206 | entry->new_line_number = 0; | |
4207 | entry->bucket = i; | |
4208 | entry->next = row_table[i]; | |
4209 | row_table[i] = entry; | |
4210 | } | |
4211 | ||
4212 | return entry; | |
4213 | } | |
4214 | ||
4215 | ||
5f5c8ee5 | 4216 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4217 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4218 | |
4219 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4220 | Technique for Isolating Differences Between Files." It should take | |
4221 | O(N) time. | |
4222 | ||
4223 | A short outline of the steps of the algorithm | |
4224 | ||
4225 | 1. Skip lines equal at the start and end of both matrices. | |
4226 | ||
4227 | 2. Enter rows in the current and desired matrix into a symbol | |
4228 | table, counting how often they appear in both matrices. | |
4229 | ||
4230 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4231 | i.e. we assume that such lines are likely to have been moved. | |
4232 | ||
4233 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4234 | forward and backward. | |
4235 | ||
4236 | Value is | |
4237 | ||
4238 | -1 if all rows were found to be equal. | |
4239 | 0 to indicate that we did not scroll the display, or | |
4240 | 1 if we did scroll. */ | |
4241 | ||
4242 | static int | |
971de7fb | 4243 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4244 | { |
5f5c8ee5 GM |
4245 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4246 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4247 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4248 | ptrdiff_t i; |
4249 | int j, first_old, first_new, last_old, last_new; | |
4250 | int nruns, run_idx; | |
0065d054 | 4251 | ptrdiff_t n; |
6df5d75f | 4252 | struct row_entry *entry; |
fa971ac3 | 4253 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4254 | |
4255 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4256 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4257 | { |
bfdcafe1 GM |
4258 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4259 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4260 | ||
4261 | if (c->enabled_p | |
4262 | && d->enabled_p | |
6b61353c | 4263 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4264 | && c->y == d->y |
4265 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4266 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4267 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4268 | { |
4269 | assign_row (c, d); | |
4270 | d->enabled_p = 0; | |
4271 | } | |
4272 | else | |
4273 | break; | |
5f5c8ee5 | 4274 | } |
4588ec20 | 4275 | |
5f5c8ee5 GM |
4276 | /* Give up if some rows in the desired matrix are not enabled. */ |
4277 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4278 | return -1; | |
177c0ea7 | 4279 | |
5f5c8ee5 GM |
4280 | first_old = first_new = i; |
4281 | ||
4d8ade89 YM |
4282 | /* Set last_new to the index + 1 of the row that reaches the |
4283 | bottom boundary in the desired matrix. Give up if we find a | |
4284 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4285 | i = first_new + 1; |
4d8ade89 YM |
4286 | while (i < desired_matrix->nrows - 1) |
4287 | { | |
4288 | int bottom; | |
5f5c8ee5 | 4289 | |
4d8ade89 YM |
4290 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4291 | return 0; | |
4292 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4293 | if (bottom <= yb) | |
4294 | ++i; | |
4295 | if (bottom >= yb) | |
4296 | break; | |
4297 | } | |
5f5c8ee5 GM |
4298 | |
4299 | last_new = i; | |
4300 | ||
4d8ade89 YM |
4301 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4302 | boundary in the current matrix. We don't look at the enabled | |
4303 | flag here because we plan to reuse part of the display even if | |
4304 | other parts are disabled. */ | |
5f5c8ee5 | 4305 | i = first_old + 1; |
93962bfa GM |
4306 | while (i < current_matrix->nrows - 1) |
4307 | { | |
4308 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4309 | if (bottom <= yb) | |
4310 | ++i; | |
4311 | if (bottom >= yb) | |
4312 | break; | |
4313 | } | |
4314 | ||
5f5c8ee5 GM |
4315 | last_old = i; |
4316 | ||
4317 | /* Skip over rows equal at the bottom. */ | |
4318 | i = last_new; | |
4319 | j = last_old; | |
4320 | while (i - 1 > first_new | |
4321 | && j - 1 > first_old | |
1e5b2111 EZ |
4322 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4323 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4324 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4325 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4326 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4327 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4328 | --i, --j; |
4329 | last_new = i; | |
4330 | last_old = j; | |
4331 | ||
4332 | /* Nothing to do if all rows are equal. */ | |
4333 | if (last_new == first_new) | |
4334 | return 0; | |
4335 | ||
0065d054 | 4336 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4337 | |
4338 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4339 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4340 | So, set next_almost_prime_increment_max to 10. | |
4341 | ||
4342 | It's just a coincidence that next_almost_prime_increment_max == | |
4343 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4344 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4345 | because next_almost_prime (113) would be 127. */ | |
4346 | { | |
4347 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4348 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4349 | ptrdiff_t row_table_max = |
0065d054 PE |
4350 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4351 | - next_almost_prime_increment_max); | |
4352 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4353 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4354 | memory_full (SIZE_MAX); |
4355 | } | |
4356 | ||
6df5d75f | 4357 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4358 | |
6df5d75f | 4359 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4360 | old_lines = xpalloc (old_lines, &old_lines_size, |
4361 | current_matrix->nrows - old_lines_size, | |
4362 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4363 | |
6df5d75f | 4364 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4365 | new_lines = xpalloc (new_lines, &new_lines_size, |
4366 | desired_matrix->nrows - new_lines_size, | |
4367 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4368 | |
ca9ce8f2 PE |
4369 | n = desired_matrix->nrows; |
4370 | n += current_matrix->nrows; | |
0065d054 | 4371 | if (row_table_size < 3 * n) |
6df5d75f | 4372 | { |
ca9ce8f2 | 4373 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4374 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4375 | row_table_size = size; |
0065d054 | 4376 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4377 | } |
4378 | ||
4379 | if (n > row_entry_pool_size) | |
0065d054 PE |
4380 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4381 | n - row_entry_pool_size, | |
4382 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4383 | |
4384 | if (desired_matrix->nrows > runs_size) | |
4385 | { | |
0065d054 PE |
4386 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4387 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4388 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4389 | } |
4390 | ||
4391 | nruns = run_idx = 0; | |
4392 | row_entry_idx = 0; | |
4393 | ||
4394 | /* Add rows from the current and desired matrix to the hash table | |
4395 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4396 | |
5f5c8ee5 GM |
4397 | for (i = first_old; i < last_old; ++i) |
4398 | { | |
4399 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4400 | { | |
6b1f9ba4 | 4401 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4402 | old_lines[i] = entry; |
4403 | ++entry->old_uses; | |
5f5c8ee5 GM |
4404 | } |
4405 | else | |
6df5d75f | 4406 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4407 | } |
4408 | ||
5f5c8ee5 GM |
4409 | for (i = first_new; i < last_new; ++i) |
4410 | { | |
a54e2c05 | 4411 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4412 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4413 | ++entry->new_uses; |
4414 | entry->new_line_number = i; | |
4415 | new_lines[i] = entry; | |
5f5c8ee5 | 4416 | } |
4588ec20 | 4417 | |
5f5c8ee5 GM |
4418 | /* Identify moves based on lines that are unique and equal |
4419 | in both matrices. */ | |
4420 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4421 | if (old_lines[i] |
4422 | && old_lines[i]->old_uses == 1 | |
4423 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4424 | { |
27786b2f | 4425 | int p, q; |
6df5d75f GM |
4426 | int new_line = old_lines[i]->new_line_number; |
4427 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4428 | |
4429 | /* Record move. */ | |
4430 | run->current_vpos = i; | |
4431 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4432 | run->desired_vpos = new_line; | |
4433 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4434 | run->nrows = 1; | |
4435 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4436 | ||
4437 | /* Extend backward. */ | |
27786b2f PE |
4438 | p = i - 1; |
4439 | q = new_line - 1; | |
4440 | while (p > first_old | |
4441 | && q > first_new | |
4442 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4443 | { |
27786b2f | 4444 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4445 | --run->current_vpos; |
4446 | --run->desired_vpos; | |
5f5c8ee5 GM |
4447 | ++run->nrows; |
4448 | run->height += h; | |
4449 | run->desired_y -= h; | |
4450 | run->current_y -= h; | |
27786b2f | 4451 | --p, --q; |
5f5c8ee5 | 4452 | } |
4588ec20 | 4453 | |
5f5c8ee5 | 4454 | /* Extend forward. */ |
27786b2f PE |
4455 | p = i + 1; |
4456 | q = new_line + 1; | |
4457 | while (p < last_old | |
4458 | && q < last_new | |
4459 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4460 | { |
27786b2f | 4461 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4462 | ++run->nrows; |
5f5c8ee5 | 4463 | run->height += h; |
27786b2f | 4464 | ++p, ++q; |
5f5c8ee5 | 4465 | } |
19dff8dc | 4466 | |
5f5c8ee5 GM |
4467 | /* Insert run into list of all runs. Order runs by copied |
4468 | pixel lines. Note that we record runs that don't have to | |
4469 | be copied because they are already in place. This is done | |
4470 | because we can avoid calling update_window_line in this | |
4471 | case. */ | |
27786b2f | 4472 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4473 | ; |
27786b2f PE |
4474 | for (q = nruns; q > p; --q) |
4475 | runs[q] = runs[q - 1]; | |
4476 | runs[p] = run; | |
5f5c8ee5 GM |
4477 | ++nruns; |
4478 | ||
4479 | i += run->nrows; | |
4480 | } | |
4481 | else | |
4482 | ++i; | |
4588ec20 | 4483 | |
5f5c8ee5 GM |
4484 | /* Do the moves. Do it in a way that we don't overwrite something |
4485 | we want to copy later on. This is not solvable in general | |
4486 | because there is only one display and we don't have a way to | |
4487 | exchange areas on this display. Example: | |
4588ec20 | 4488 | |
5f5c8ee5 GM |
4489 | +-----------+ +-----------+ |
4490 | | A | | B | | |
4491 | +-----------+ --> +-----------+ | |
4492 | | B | | A | | |
4493 | +-----------+ +-----------+ | |
4588ec20 | 4494 | |
5f5c8ee5 GM |
4495 | Instead, prefer bigger moves, and invalidate moves that would |
4496 | copy from where we copied to. */ | |
ea0d86af | 4497 | |
5f5c8ee5 GM |
4498 | for (i = 0; i < nruns; ++i) |
4499 | if (runs[i]->nrows > 0) | |
4500 | { | |
4501 | struct run *r = runs[i]; | |
24e86043 | 4502 | |
5f5c8ee5 GM |
4503 | /* Copy on the display. */ |
4504 | if (r->current_y != r->desired_y) | |
4505 | { | |
989b42d2 | 4506 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4507 | rif->scroll_run_hook (w, r); |
1305621b | 4508 | } |
5f5c8ee5 | 4509 | |
1305621b YM |
4510 | /* Truncate runs that copy to where we copied to, and |
4511 | invalidate runs that copy from where we copied to. */ | |
4512 | for (j = nruns - 1; j > i; --j) | |
4513 | { | |
4514 | struct run *p = runs[j]; | |
4515 | int truncated_p = 0; | |
5f5c8ee5 | 4516 | |
1305621b YM |
4517 | if (p->nrows > 0 |
4518 | && p->desired_y < r->desired_y + r->height | |
4519 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4520 | { |
1305621b YM |
4521 | if (p->desired_y < r->desired_y) |
4522 | { | |
4523 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4524 | p->height = r->desired_y - p->desired_y; | |
4525 | truncated_p = 1; | |
4526 | } | |
4527 | else | |
4528 | { | |
4529 | int nrows_copied = (r->desired_vpos + r->nrows | |
4530 | - p->desired_vpos); | |
4531 | ||
4532 | if (p->nrows <= nrows_copied) | |
4533 | p->nrows = 0; | |
4534 | else | |
4535 | { | |
4536 | int height_copied = (r->desired_y + r->height | |
4537 | - p->desired_y); | |
4538 | ||
4539 | p->current_vpos += nrows_copied; | |
4540 | p->desired_vpos += nrows_copied; | |
4541 | p->nrows -= nrows_copied; | |
4542 | p->current_y += height_copied; | |
4543 | p->desired_y += height_copied; | |
4544 | p->height -= height_copied; | |
4545 | truncated_p = 1; | |
4546 | } | |
4547 | } | |
4548 | } | |
177c0ea7 | 4549 | |
1305621b YM |
4550 | if (r->current_y != r->desired_y |
4551 | /* The condition below is equivalent to | |
4552 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4553 | && p->current_y < r->desired_y + r->height) |
1305621b | 4554 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4555 | && (p->current_y + p->height |
1305621b YM |
4556 | <= r->desired_y + r->height))) |
4557 | because we have 0 < p->height <= r->height. */ | |
4558 | && p->current_y < r->desired_y + r->height | |
4559 | && p->current_y + p->height > r->desired_y) | |
4560 | p->nrows = 0; | |
4561 | ||
4562 | /* Reorder runs by copied pixel lines if truncated. */ | |
4563 | if (truncated_p && p->nrows > 0) | |
4564 | { | |
4565 | int k = nruns - 1; | |
4566 | ||
4567 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4568 | k--; | |
4569 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4570 | runs[k] = p; | |
5f5c8ee5 GM |
4571 | } |
4572 | } | |
ea0d86af | 4573 | |
5f5c8ee5 GM |
4574 | /* Assign matrix rows. */ |
4575 | for (j = 0; j < r->nrows; ++j) | |
4576 | { | |
4577 | struct glyph_row *from, *to; | |
408f5064 | 4578 | int to_overlapped_p; |
e876ff42 | 4579 | |
5f5c8ee5 GM |
4580 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4581 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4582 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4583 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4584 | assign_row (to, from); |
1305621b YM |
4585 | /* The above `assign_row' actually does swap, so if we had |
4586 | an overlap in the copy destination of two runs, then | |
4587 | the second run would assign a previously disabled bogus | |
4588 | row. But thanks to the truncation code in the | |
4589 | preceding for-loop, we no longer have such an overlap, | |
4590 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4591 | eassert (to->enabled_p); |
1305621b | 4592 | from->enabled_p = 0; |
408f5064 | 4593 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4594 | } |
4595 | } | |
15874c59 | 4596 | |
6df5d75f GM |
4597 | /* Clear the hash table, for the next time. */ |
4598 | for (i = 0; i < row_entry_idx; ++i) | |
4599 | row_table[row_entry_pool[i].bucket] = NULL; | |
4600 | ||
aec1708a PE |
4601 | /* Value is 1 to indicate that we scrolled the display. */ |
4602 | return 0 < nruns; | |
5f5c8ee5 | 4603 | } |
de83c314 | 4604 | |
15874c59 | 4605 | |
4588ec20 | 4606 | \f |
5f5c8ee5 GM |
4607 | /************************************************************************ |
4608 | Frame-Based Updates | |
4609 | ************************************************************************/ | |
4588ec20 | 4610 | |
5f5c8ee5 | 4611 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4612 | |
5f5c8ee5 GM |
4613 | FORCE_P non-zero means that the update should not be stopped by |
4614 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4615 | should not be tried. | |
4616 | ||
4617 | Value is non-zero if update was stopped due to pending input. */ | |
4618 | ||
4619 | static int | |
971de7fb | 4620 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4621 | { |
5f5c8ee5 GM |
4622 | /* Frame matrices to work on. */ |
4623 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4624 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4625 | int i; | |
27786b2f | 4626 | int pause_p; |
4588ec20 | 4627 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4628 | |
a54e2c05 | 4629 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4630 | |
c37e4889 RS |
4631 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4632 | calculate_costs (f); | |
4633 | ||
d88c2b9e RS |
4634 | if (preempt_count <= 0) |
4635 | preempt_count = 1; | |
4636 | ||
a2130dbb KS |
4637 | #if !PERIODIC_PREEMPTION_CHECKING |
4638 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4639 | { |
27786b2f | 4640 | pause_p = 1; |
4588ec20 JB |
4641 | goto do_pause; |
4642 | } | |
d012c62b | 4643 | #endif |
4588ec20 | 4644 | |
5f5c8ee5 | 4645 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4646 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4647 | inhibit_id_p = 1; |
7098a0fa | 4648 | |
efb859b4 | 4649 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4650 | i/d line if just want cursor motion. */ |
4651 | for (i = 0; i < desired_matrix->nrows; i++) | |
4652 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4653 | break; |
4654 | ||
4655 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4656 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4657 | force_p |= scrolling (f); | |
4588ec20 JB |
4658 | |
4659 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4660 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4661 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4662 | |
5f5c8ee5 GM |
4663 | /* Now update the rest of the lines. */ |
4664 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4665 | { |
5f5c8ee5 | 4666 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4667 | { |
b6a65ac2 | 4668 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4669 | { |
4670 | /* Flush out every so many lines. | |
4671 | Also flush out if likely to have more than 1k buffered | |
4672 | otherwise. I'm told that some telnet connections get | |
4673 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4674 | FILE *display_output = FRAME_TTY (f)->output; |
4675 | if (display_output) | |
4588ec20 | 4676 | { |
fced92f1 CY |
4677 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4678 | if (outq > 900 | |
4679 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4680 | { |
fced92f1 CY |
4681 | fflush (display_output); |
4682 | if (preempt_count == 1) | |
4683 | { | |
a41f8bed | 4684 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4685 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4686 | /* Probably not a tty. Ignore the error and reset | |
4687 | the outq count. */ | |
4688 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4689 | #endif |
fced92f1 CY |
4690 | outq *= 10; |
4691 | if (baud_rate <= outq && baud_rate > 0) | |
4692 | sleep (outq / baud_rate); | |
4693 | } | |
4588ec20 JB |
4694 | } |
4695 | } | |
4588ec20 JB |
4696 | } |
4697 | ||
d012c62b KS |
4698 | #if PERIODIC_PREEMPTION_CHECKING |
4699 | if (!force_p) | |
4700 | { | |
e9a9ae03 | 4701 | EMACS_TIME tm = current_emacs_time (); |
d35af63c | 4702 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b | 4703 | { |
e9a9ae03 | 4704 | preemption_next_check = add_emacs_time (tm, preemption_period); |
993d4ab6 KS |
4705 | if (detect_input_pending_ignore_squeezables ()) |
4706 | break; | |
d012c62b KS |
4707 | } |
4708 | } | |
4709 | #else | |
4710 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4711 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4712 | #endif |
a2960116 | 4713 | |
5f5c8ee5 | 4714 | update_frame_line (f, i); |
4588ec20 | 4715 | } |
4588ec20 | 4716 | } |
177c0ea7 | 4717 | |
27786b2f | 4718 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4719 | |
4720 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4721 | if (!pause_p) |
4588ec20 | 4722 | { |
48cf7030 | 4723 | if ((cursor_in_echo_area |
5f5c8ee5 | 4724 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4725 | show the cursor for the message instead of for the |
5f5c8ee5 | 4726 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4727 | || (EQ (minibuf_window, selected_window) |
4728 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4729 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4730 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4731 | the active mini-buffer window. */ |
2577053b | 4732 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4733 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4734 | { |
7df02016 | 4735 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4736 | int row, col; |
4737 | ||
4738 | if (cursor_in_echo_area < 0) | |
4739 | { | |
5f5c8ee5 GM |
4740 | /* Negative value of cursor_in_echo_area means put |
4741 | cursor at beginning of line. */ | |
648fa17d JB |
4742 | row = top; |
4743 | col = 0; | |
4744 | } | |
1113d9db | 4745 | else |
648fa17d | 4746 | { |
5f5c8ee5 GM |
4747 | /* Positive value of cursor_in_echo_area means put |
4748 | cursor at the end of the prompt. If the mini-buffer | |
4749 | is several lines high, find the last line that has | |
4750 | any text on it. */ | |
7df02016 | 4751 | row = FRAME_LINES (f); |
177c0ea7 | 4752 | do |
648fa17d | 4753 | { |
5f5c8ee5 GM |
4754 | --row; |
4755 | col = 0; | |
177c0ea7 | 4756 | |
5f5c8ee5 GM |
4757 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4758 | { | |
4759 | /* Frame rows are filled up with spaces that | |
4760 | must be ignored here. */ | |
5f5c8ee5 GM |
4761 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4762 | row); | |
4763 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4764 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4765 | ||
4766 | while (last > start | |
4767 | && (last - 1)->charpos < 0) | |
4768 | --last; | |
177c0ea7 | 4769 | |
5f5c8ee5 GM |
4770 | col = last - start; |
4771 | } | |
648fa17d JB |
4772 | } |
4773 | while (row > top && col == 0); | |
4774 | ||
6395da5c | 4775 | /* Make sure COL is not out of range. */ |
868e640e | 4776 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4777 | { |
6395da5c | 4778 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4779 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4780 | { |
7df02016 | 4781 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4782 | row++; |
4783 | } | |
4784 | /* Otherwise move it back in range. */ | |
4785 | else | |
868e640e | 4786 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4787 | } |
4788 | } | |
4789 | ||
385ed61f | 4790 | cursor_to (f, row, col); |
1113d9db | 4791 | } |
4588ec20 | 4792 | else |
5f5c8ee5 GM |
4793 | { |
4794 | /* We have only one cursor on terminal frames. Use it to | |
4795 | display the cursor of the selected window. */ | |
4796 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4797 | if (w->cursor.vpos >= 0 |
4798 | /* The cursor vpos may be temporarily out of bounds | |
4799 | in the following situation: There is one window, | |
4800 | with the cursor in the lower half of it. The window | |
4801 | is split, and a message causes a redisplay before | |
4802 | a new cursor position has been computed. */ | |
7df02016 | 4803 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4804 | { |
4805 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4806 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4807 | ||
7df02016 KS |
4808 | if (INTEGERP (w->left_margin_cols)) |
4809 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4810 | |
7df02016 | 4811 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4812 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4813 | } |
4814 | } | |
4588ec20 JB |
4815 | } |
4816 | ||
ef1b0ba7 | 4817 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4818 | do_pause: |
ef1b0ba7 | 4819 | #endif |
4588ec20 | 4820 | |
5f5c8ee5 | 4821 | clear_desired_matrices (f); |
27786b2f | 4822 | return pause_p; |
4588ec20 JB |
4823 | } |
4824 | ||
4588ec20 | 4825 | |
5f5c8ee5 | 4826 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4827 | |
5bf46f05 | 4828 | static int |
971de7fb | 4829 | scrolling (struct frame *frame) |
4588ec20 JB |
4830 | { |
4831 | int unchanged_at_top, unchanged_at_bottom; | |
4832 | int window_size; | |
4833 | int changed_lines; | |
38182d90 PE |
4834 | int *old_hash = alloca (FRAME_LINES (frame) * sizeof (int)); |
4835 | int *new_hash = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4836 | int *draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4837 | int *old_draw_cost = alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4838 | register int i; |
7df02016 | 4839 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4840 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4841 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4842 | |
5f5c8ee5 GM |
4843 | if (!current_matrix) |
4844 | abort (); | |
4588ec20 | 4845 | |
5f5c8ee5 GM |
4846 | /* Compute hash codes of all the lines. Also calculate number of |
4847 | changed lines, number of unchanged lines at the beginning, and | |
4848 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4849 | changed_lines = 0; |
4850 | unchanged_at_top = 0; | |
7df02016 KS |
4851 | unchanged_at_bottom = FRAME_LINES (frame); |
4852 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4853 | { |
4854 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4855 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4856 | return 0; |
5f5c8ee5 GM |
4857 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4858 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4859 | { |
4860 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4861 | new_hash[i] = old_hash[i]; | |
4862 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4863 | draw_cost[i] = INFINITY; | |
4864 | } | |
4588ec20 | 4865 | else |
f188b3c4 | 4866 | { |
5f5c8ee5 GM |
4867 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4868 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4869 | } |
4588ec20 JB |
4870 | |
4871 | if (old_hash[i] != new_hash[i]) | |
4872 | { | |
4873 | changed_lines++; | |
7df02016 | 4874 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4875 | } |
4876 | else if (i == unchanged_at_top) | |
4877 | unchanged_at_top++; | |
5f5c8ee5 | 4878 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4879 | } |
4880 | ||
4881 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4882 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4883 | && changed_lines < baud_rate / 2400) |
7df02016 | 4884 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4885 | return 1; |
4886 | ||
7df02016 | 4887 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4888 | - unchanged_at_bottom); |
4889 | ||
daf01701 | 4890 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4891 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4892 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4893 | free_at_end_vpos = -1; |
4894 | ||
4895 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4896 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4897 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4898 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4899 | && (window_size >= |
4900 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4901 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4902 | old_hash, new_hash, draw_cost))) |
4903 | return 0; | |
4904 | ||
5f5c8ee5 GM |
4905 | if (window_size < 2) |
4906 | return 0; | |
4907 | ||
502b9b64 | 4908 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4909 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4910 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4911 | old_hash + unchanged_at_top - 1, |
4912 | new_hash + unchanged_at_top - 1, | |
4913 | free_at_end_vpos - unchanged_at_top); | |
4914 | ||
4915 | return 0; | |
4916 | } | |
4588ec20 | 4917 | |
4588ec20 | 4918 | |
5f5c8ee5 GM |
4919 | /* Count the number of blanks at the start of the vector of glyphs R |
4920 | which is LEN glyphs long. */ | |
4588ec20 | 4921 | |
4588ec20 | 4922 | static int |
971de7fb | 4923 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4924 | { |
5f5c8ee5 | 4925 | int i; |
177c0ea7 | 4926 | |
5f5c8ee5 GM |
4927 | for (i = 0; i < len; ++i) |
4928 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4929 | break; | |
4930 | ||
4931 | return i; | |
4588ec20 JB |
4932 | } |
4933 | ||
5f5c8ee5 GM |
4934 | |
4935 | /* Count the number of glyphs in common at the start of the glyph | |
4936 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4937 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4938 | ||
4588ec20 | 4939 | static int |
971de7fb | 4940 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4941 | { |
5f5c8ee5 GM |
4942 | struct glyph *p1 = str1; |
4943 | struct glyph *p2 = str2; | |
177c0ea7 | 4944 | |
5f5c8ee5 GM |
4945 | while (p1 < end1 |
4946 | && p2 < end2 | |
42186983 | 4947 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4948 | ++p1, ++p2; |
177c0ea7 | 4949 | |
5f5c8ee5 | 4950 | return p1 - str1; |
4588ec20 JB |
4951 | } |
4952 | ||
5f5c8ee5 | 4953 | |
4588ec20 | 4954 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4955 | |
5e617bc2 | 4956 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4957 | |
5f5c8ee5 GM |
4958 | |
4959 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4960 | ||
4588ec20 | 4961 | static void |
971de7fb | 4962 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4963 | { |
5f5c8ee5 | 4964 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4965 | int tem; |
4966 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4967 | struct glyph_matrix *current_matrix = f->current_matrix; |
4968 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4969 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4970 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4971 | int must_write_whole_line_p; | |
daf01701 | 4972 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4973 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4974 | != FACE_TTY_DEFAULT_BG_COLOR); |
4975 | ||
4976 | if (colored_spaces_p) | |
4977 | write_spaces_p = 1; | |
5f5c8ee5 | 4978 | |
26c63686 GM |
4979 | /* Current row not enabled means it has unknown contents. We must |
4980 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4981 | must_write_whole_line_p = !current_row->enabled_p; |
4982 | if (must_write_whole_line_p) | |
4588ec20 | 4983 | { |
5f5c8ee5 | 4984 | obody = 0; |
4588ec20 JB |
4985 | olen = 0; |
4986 | } | |
4987 | else | |
4988 | { | |
5f5c8ee5 GM |
4989 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
4990 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 4991 | |
4cecaab8 MB |
4992 | /* Ignore trailing spaces, if we can. */ |
4993 | if (!write_spaces_p) | |
4994 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
4995 | olen--; | |
4588ec20 JB |
4996 | } |
4997 | ||
5f5c8ee5 GM |
4998 | current_row->enabled_p = 1; |
4999 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5000 | |
5f5c8ee5 GM |
5001 | /* If desired line is empty, just clear the line. */ |
5002 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5003 | { |
5004 | nlen = 0; | |
5005 | goto just_erase; | |
5006 | } | |
5007 | ||
5f5c8ee5 GM |
5008 | nbody = desired_row->glyphs[TEXT_AREA]; |
5009 | nlen = desired_row->used[TEXT_AREA]; | |
5010 | nend = nbody + nlen; | |
5011 | ||
5012 | /* If display line has unknown contents, write the whole line. */ | |
5013 | if (must_write_whole_line_p) | |
5014 | { | |
26c63686 | 5015 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5016 | if (!write_spaces_p) |
74ca462f GM |
5017 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5018 | --nlen; | |
5019 | ||
26c63686 | 5020 | /* Write the contents of the desired line. */ |
74ca462f | 5021 | if (nlen) |
26c63686 | 5022 | { |
385ed61f KL |
5023 | cursor_to (f, vpos, 0); |
5024 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5025 | } |
177c0ea7 | 5026 | |
26c63686 GM |
5027 | /* Don't call clear_end_of_line if we already wrote the whole |
5028 | line. The cursor will not be at the right margin in that | |
5029 | case but in the line below. */ | |
7df02016 | 5030 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5031 | { |
385ed61f KL |
5032 | cursor_to (f, vpos, nlen); |
5033 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5034 | } |
58827478 GM |
5035 | else |
5036 | /* Make sure we are in the right row, otherwise cursor movement | |
5037 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5038 | cursor_to (f, vpos, 0); |
177c0ea7 | 5039 | |
5f5c8ee5 GM |
5040 | make_current (desired_matrix, current_matrix, vpos); |
5041 | return; | |
5042 | } | |
4588ec20 JB |
5043 | |
5044 | /* Pretend trailing spaces are not there at all, | |
5045 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5046 | if (!write_spaces_p) |
5047 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5048 | nlen--; | |
4588ec20 JB |
5049 | |
5050 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5051 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5052 | { |
5f5c8ee5 | 5053 | int i, j; |
4588ec20 | 5054 | |
5f5c8ee5 GM |
5055 | /* Find the first glyph in desired row that doesn't agree with |
5056 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5057 | for (i = 0; i < nlen; i++) |
5058 | { | |
5f5c8ee5 | 5059 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5060 | { |
5f5c8ee5 GM |
5061 | /* Find the end of the run of different glyphs. */ |
5062 | j = i + 1; | |
5063 | while (j < nlen | |
5064 | && (j >= olen | |
5065 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5066 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5067 | ++j; | |
177c0ea7 JB |
5068 | |
5069 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5070 | cursor_to (f, vpos, i); |
5071 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5072 | i = j - 1; |
4588ec20 JB |
5073 | |
5074 | /* Now find the next non-match. */ | |
5075 | } | |
5076 | } | |
5077 | ||
5078 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5079 | if (olen > nlen) | |
5080 | { | |
385ed61f KL |
5081 | cursor_to (f, vpos, nlen); |
5082 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5083 | } |
5084 | ||
5f5c8ee5 GM |
5085 | /* Make current row = desired row. */ |
5086 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5087 | return; |
5088 | } | |
5089 | ||
5f5c8ee5 GM |
5090 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5091 | characters in a row. */ | |
5092 | ||
4588ec20 JB |
5093 | if (!olen) |
5094 | { | |
5f5c8ee5 GM |
5095 | /* If current line is blank, skip over initial spaces, if |
5096 | possible, and write the rest. */ | |
4cecaab8 | 5097 | if (write_spaces_p) |
5f5c8ee5 GM |
5098 | nsp = 0; |
5099 | else | |
5100 | nsp = count_blanks (nbody, nlen); | |
5101 | ||
4588ec20 JB |
5102 | if (nlen > nsp) |
5103 | { | |
385ed61f KL |
5104 | cursor_to (f, vpos, nsp); |
5105 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5106 | } |
5107 | ||
502b9b64 | 5108 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5109 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5110 | return; |
5111 | } | |
5112 | ||
4588ec20 | 5113 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5114 | osp = count_blanks (obody, olen); |
4cecaab8 | 5115 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5116 | |
5f5c8ee5 GM |
5117 | /* Compute number of matching chars starting with first non-blank. */ |
5118 | begmatch = count_match (obody + osp, obody + olen, | |
5119 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5120 | |
5121 | /* Spaces in new match implicit space past the end of old. */ | |
5122 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5123 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5124 | { |
5125 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5126 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5127 | ++begmatch; | |
4588ec20 JB |
5128 | } |
5129 | ||
5130 | /* Avoid doing insert/delete char | |
5131 | just cause number of leading spaces differs | |
5f5c8ee5 | 5132 | when the following text does not match. */ |
4588ec20 JB |
5133 | if (begmatch == 0 && osp != nsp) |
5134 | osp = nsp = min (osp, nsp); | |
5135 | ||
5136 | /* Find matching characters at end of line */ | |
5137 | op1 = obody + olen; | |
5138 | np1 = nbody + nlen; | |
5139 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5140 | while (op1 > op2 |
5141 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5142 | { |
5143 | op1--; | |
5144 | np1--; | |
5145 | } | |
5146 | endmatch = obody + olen - op1; | |
5147 | ||
4588ec20 JB |
5148 | /* tem gets the distance to insert or delete. |
5149 | endmatch is how many characters we save by doing so. | |
5150 | Is it worth it? */ | |
5151 | ||
5152 | tem = (nlen - nsp) - (olen - osp); | |
5153 | if (endmatch && tem | |
daf01701 | 5154 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5155 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5156 | endmatch = 0; |
5157 | ||
5158 | /* nsp - osp is the distance to insert or delete. | |
5159 | If that is nonzero, begmatch is known to be nonzero also. | |
5160 | begmatch + endmatch is how much we save by doing the ins/del. | |
5161 | Is it worth it? */ | |
5162 | ||
5163 | if (nsp != osp | |
daf01701 | 5164 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5165 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5166 | { |
5167 | begmatch = 0; | |
5168 | endmatch = 0; | |
5169 | osp = nsp = min (osp, nsp); | |
5170 | } | |
5171 | ||
5172 | /* Now go through the line, inserting, writing and | |
5173 | deleting as appropriate. */ | |
5174 | ||
5175 | if (osp > nsp) | |
5176 | { | |
385ed61f KL |
5177 | cursor_to (f, vpos, nsp); |
5178 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5179 | } |
5180 | else if (nsp > osp) | |
5181 | { | |
5182 | /* If going to delete chars later in line | |
5183 | and insert earlier in the line, | |
5184 | must delete first to avoid losing data in the insert */ | |
5185 | if (endmatch && nlen < olen + nsp - osp) | |
5186 | { | |
385ed61f KL |
5187 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5188 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5189 | olen = nlen - (nsp - osp); |
5190 | } | |
385ed61f KL |
5191 | cursor_to (f, vpos, osp); |
5192 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5193 | } |
5194 | olen += nsp - osp; | |
5195 | ||
5196 | tem = nsp + begmatch + endmatch; | |
5197 | if (nlen != tem || olen != tem) | |
5198 | { | |
4588ec20 JB |
5199 | if (!endmatch || nlen == olen) |
5200 | { | |
c363a1d6 GM |
5201 | /* If new text being written reaches right margin, there is |
5202 | no need to do clear-to-eol at the end of this function | |
5203 | (and it would not be safe, since cursor is not going to | |
5204 | be "at the margin" after the text is done). */ | |
7df02016 | 5205 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5206 | olen = 0; |
c363a1d6 GM |
5207 | |
5208 | /* Function write_glyphs is prepared to do nothing | |
5209 | if passed a length <= 0. Check it here to avoid | |
5210 | unnecessary cursor movement. */ | |
5211 | if (nlen - tem > 0) | |
5212 | { | |
385ed61f KL |
5213 | cursor_to (f, vpos, nsp + begmatch); |
5214 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5215 | } |
4588ec20 JB |
5216 | } |
5217 | else if (nlen > olen) | |
5218 | { | |
24e86043 KH |
5219 | /* Here, we used to have the following simple code: |
5220 | ---------------------------------------- | |
5221 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5222 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5223 | ---------------------------------------- | |
5224 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5225 | is a padding glyph. */ | |
5226 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5227 | int del; | |
5f5c8ee5 | 5228 | |
385ed61f | 5229 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5230 | |
5f5c8ee5 | 5231 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5232 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5233 | out--; | |
385ed61f | 5234 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5235 | |
5f5c8ee5 GM |
5236 | /* If we left columns to be overwritten, we must delete them. */ |
5237 | del = olen - tem - out; | |
c363a1d6 | 5238 | if (del > 0) |
385ed61f | 5239 | delete_glyphs (f, del); |
177c0ea7 | 5240 | |
5f5c8ee5 | 5241 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5242 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5243 | olen = nlen; |
5244 | } | |
5245 | else if (olen > nlen) | |
5246 | { | |
385ed61f KL |
5247 | cursor_to (f, vpos, nsp + begmatch); |
5248 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5249 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5250 | olen = nlen; |
5251 | } | |
bd9e3e75 | 5252 | } |
5f5c8ee5 GM |
5253 | |
5254 | just_erase: | |
5255 | /* If any unerased characters remain after the new line, erase them. */ | |
5256 | if (olen > nlen) | |
078b3696 | 5257 | { |
385ed61f KL |
5258 | cursor_to (f, vpos, nlen); |
5259 | clear_end_of_line (f, olen); | |
078b3696 | 5260 | } |
5f5c8ee5 GM |
5261 | |
5262 | /* Exchange contents between current_frame and new_frame. */ | |
5263 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5264 | } |
5f5c8ee5 GM |
5265 | |
5266 | ||
078b3696 | 5267 | \f |
5f5c8ee5 GM |
5268 | /*********************************************************************** |
5269 | X/Y Position -> Buffer Position | |
5270 | ***********************************************************************/ | |
5271 | ||
a1b0a6db | 5272 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5273 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5274 | Return in *POS the position in that object. |
2396cbba EZ |
5275 | Adjust *X and *Y to character positions. |
5276 | Return in *DX and *DY the pixel coordinates of the click, | |
5277 | relative to the top left corner of OBJECT, or relative to | |
5278 | the top left corner of the character glyph at (*X, *Y) | |
5279 | if OBJECT is nil. | |
5280 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5281 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5282 | |
6b61353c | 5283 | Lisp_Object |
971de7fb | 5284 | 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 | 5285 | { |
5f5c8ee5 | 5286 | struct it it; |
707ea971 | 5287 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5288 | struct text_pos startp; |
6b61353c KH |
5289 | Lisp_Object string; |
5290 | struct glyph_row *row; | |
cedd7cd9 KS |
5291 | #ifdef HAVE_WINDOW_SYSTEM |
5292 | struct image *img = 0; | |
5293 | #endif | |
2396cbba | 5294 | int x0, x1, to_x; |
57b3e30b | 5295 | void *itdata = NULL; |
5f5c8ee5 | 5296 | |
707ea971 CY |
5297 | /* We used to set current_buffer directly here, but that does the |
5298 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5299 | Fset_buffer (w->buffer); | |
57b3e30b | 5300 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5301 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5302 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5303 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5304 | start_display (&it, w, startp); | |
352ec8ff EZ |
5305 | /* start_display takes into account the header-line row, but IT's |
5306 | vpos still counts from the glyph row that includes the window's | |
5307 | start position. Adjust for a possible header-line row. */ | |
5308 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; | |
177c0ea7 | 5309 | |
9173a8fb | 5310 | x0 = *x; |
2396cbba EZ |
5311 | |
5312 | /* First, move to the beginning of the row corresponding to *Y. We | |
5313 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5314 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5315 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5316 | ||
5317 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5318 | glyph at *X. We add it.first_visible_x because iterator |
5319 | positions include the hscroll. */ | |
2396cbba EZ |
5320 | to_x = x0 + it.first_visible_x; |
5321 | if (it.bidi_it.paragraph_dir == R2L) | |
5322 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5323 | text area. This is because the iterator, even in R2L | |
5324 | paragraphs, delivers glyphs as if they started at the left | |
5325 | margin of the window. (When we actually produce glyphs for | |
5326 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5327 | iterator doesn't know about that.) The following line adjusts | |
5328 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5329 | move_it_* routines use. (The -1 is because in a window whose |
5330 | text-area width is W, the rightmost pixel position is W-1, and | |
5331 | it should be mirrored into zero pixel position.) */ | |
5332 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5333 | ||
5334 | /* Now move horizontally in the row to the glyph under *X. Second | |
5335 | argument is ZV to prevent move_it_in_display_line from matching | |
5336 | based on buffer positions. */ | |
2396cbba | 5337 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5338 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5339 | |
707ea971 | 5340 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5341 | |
6b61353c KH |
5342 | *dx = x0 + it.first_visible_x - it.current_x; |
5343 | *dy = *y - it.current_y; | |
5344 | ||
5345 | string = w->buffer; | |
5346 | if (STRINGP (it.string)) | |
5347 | string = it.string; | |
a1b0a6db | 5348 | *pos = it.current; |
86282aab KH |
5349 | if (it.what == IT_COMPOSITION |
5350 | && it.cmp_it.nchars > 1 | |
5351 | && it.cmp_it.reversed_p) | |
5352 | { | |
5353 | /* The current display element is a grapheme cluster in a | |
5354 | composition. In that case, we need the position of the first | |
5355 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5356 | it.current points to the last character of the cluster, thus | |
5357 | we must move back to the first character of the same | |
5358 | cluster. */ | |
5359 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5360 | if (STRINGP (it.string)) | |
5361 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5362 | else | |
425cc014 EZ |
5363 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5364 | CHARPOS (pos->pos)); | |
86282aab | 5365 | } |
6b61353c KH |
5366 | |
5367 | #ifdef HAVE_WINDOW_SYSTEM | |
5368 | if (it.what == IT_IMAGE) | |
5369 | { | |
6b61353c KH |
5370 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5371 | && !NILP (img->spec)) | |
5372 | *object = img->spec; | |
5373 | } | |
5374 | #endif | |
5375 | ||
b70d98e1 KS |
5376 | if (it.vpos < w->current_matrix->nrows |
5377 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5378 | row->enabled_p)) | |
6b61353c KH |
5379 | { |
5380 | if (it.hpos < row->used[TEXT_AREA]) | |
5381 | { | |
5382 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5383 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5384 | if (img) |
5385 | { | |
5386 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5387 | *dx += glyph->slice.img.x; |
5388 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5389 | /* Image slices positions are still relative to the entire image */ |
5390 | *width = img->width; | |
5391 | *height = img->height; | |
5392 | } | |
5393 | else | |
6b61353c | 5394 | #endif |
cedd7cd9 KS |
5395 | { |
5396 | *width = glyph->pixel_width; | |
5397 | *height = glyph->ascent + glyph->descent; | |
5398 | } | |
6b61353c KH |
5399 | } |
5400 | else | |
5401 | { | |
5402 | *width = 0; | |
5403 | *height = row->height; | |
5404 | } | |
5405 | } | |
5406 | else | |
5407 | { | |
5408 | *width = *height = 0; | |
5409 | } | |
5410 | ||
5411 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5412 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5413 | if (x0 > x1) |
5414 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5415 | ||
5416 | *x = it.hpos; | |
5417 | *y = it.vpos; | |
5418 | ||
5419 | return string; | |
5f5c8ee5 | 5420 | } |
4588ec20 | 5421 | |
5f5c8ee5 GM |
5422 | |
5423 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5424 | mode line or header line (PART says which) of window W, or nil if none. |
5425 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5426 | |
5427 | Lisp_Object | |
ace1712c | 5428 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5429 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5430 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5431 | { |
5432 | struct glyph_row *row; | |
5433 | struct glyph *glyph, *end; | |
6b61353c | 5434 | int x0, y0; |
5f5c8ee5 GM |
5435 | Lisp_Object string = Qnil; |
5436 | ||
641bdbf3 | 5437 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5438 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5439 | else | |
045dee35 | 5440 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5441 | y0 = *y - row->y; |
5442 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5443 | |
5444 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5445 | { |
5f5c8ee5 GM |
5446 | /* Find the glyph under X. If we find one with a string object, |
5447 | it's the one we were looking for. */ | |
5448 | glyph = row->glyphs[TEXT_AREA]; | |
5449 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5450 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5451 | x0 -= glyph->pixel_width; |
5452 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5453 | if (glyph < end) | |
5454 | { | |
5455 | string = glyph->object; | |
5456 | *charpos = glyph->charpos; | |
5457 | *width = glyph->pixel_width; | |
5458 | *height = glyph->ascent + glyph->descent; | |
5459 | #ifdef HAVE_WINDOW_SYSTEM | |
5460 | if (glyph->type == IMAGE_GLYPH) | |
5461 | { | |
5462 | struct image *img; | |
5463 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5464 | if (img != NULL) | |
5465 | *object = img->spec; | |
5466 | y0 -= row->ascent - glyph->ascent; | |
5467 | } | |
5468 | #endif | |
5469 | } | |
5470 | else | |
5471 | { | |
5472 | /* Add extra (default width) columns if clicked after EOL. */ | |
5473 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5474 | *width = 0; | |
5475 | *height = row->height; | |
5476 | } | |
5477 | } | |
5478 | else | |
5479 | { | |
5480 | *x = 0; | |
5481 | x0 = 0; | |
5482 | *width = *height = 0; | |
4588ec20 | 5483 | } |
5f5c8ee5 | 5484 | |
6b61353c KH |
5485 | *dx = x0; |
5486 | *dy = y0; | |
5487 | ||
5f5c8ee5 | 5488 | return string; |
4588ec20 | 5489 | } |
5f5c8ee5 GM |
5490 | |
5491 | ||
db1db309 GM |
5492 | /* Value is the string under window-relative coordinates X/Y in either |
5493 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5494 | the string returned. */ | |
5495 | ||
5496 | Lisp_Object | |
ace1712c | 5497 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5498 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5499 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5500 | { |
5501 | struct glyph_row *row = w->current_matrix->rows; | |
5502 | struct glyph *glyph, *end; | |
6b61353c | 5503 | int x0, y0, i, wy = *y; |
641bdbf3 | 5504 | int area; |
db1db309 GM |
5505 | Lisp_Object string = Qnil; |
5506 | ||
641bdbf3 | 5507 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5508 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5509 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5510 | area = RIGHT_MARGIN_AREA; |
5511 | else | |
5512 | abort (); | |
5513 | ||
5514 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5515 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5516 | break; | |
6b61353c KH |
5517 | y0 = *y - row->y; |
5518 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5519 | |
5520 | if (row->enabled_p) | |
5521 | { | |
5522 | /* Find the glyph under X. If we find one with a string object, | |
5523 | it's the one we were looking for. */ | |
db1db309 | 5524 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5525 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5526 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5527 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5528 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5529 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5530 | else |
7df02016 | 5531 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5532 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5533 | : 0); |
5534 | ||
6b61353c KH |
5535 | glyph = row->glyphs[area]; |
5536 | end = glyph + row->used[area]; | |
cfde341f | 5537 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5538 | x0 -= glyph->pixel_width; |
5539 | *x = glyph - row->glyphs[area]; | |
5540 | if (glyph < end) | |
5541 | { | |
5542 | string = glyph->object; | |
5543 | *charpos = glyph->charpos; | |
5544 | *width = glyph->pixel_width; | |
5545 | *height = glyph->ascent + glyph->descent; | |
5546 | #ifdef HAVE_WINDOW_SYSTEM | |
5547 | if (glyph->type == IMAGE_GLYPH) | |
5548 | { | |
5549 | struct image *img; | |
5550 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5551 | if (img != NULL) | |
5552 | *object = img->spec; | |
5553 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5554 | x0 += glyph->slice.img.x; |
5555 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5556 | } |
5557 | #endif | |
5558 | } | |
5559 | else | |
5560 | { | |
5561 | /* Add extra (default width) columns if clicked after EOL. */ | |
5562 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5563 | *width = 0; | |
5564 | *height = row->height; | |
5565 | } | |
db1db309 | 5566 | } |
6b61353c KH |
5567 | else |
5568 | { | |
5569 | x0 = 0; | |
5570 | *x = 0; | |
5571 | *width = *height = 0; | |
5572 | } | |
5573 | ||
5574 | *dx = x0; | |
5575 | *dy = y0; | |
db1db309 GM |
5576 | |
5577 | return string; | |
5578 | } | |
5579 | ||
5580 | ||
5f5c8ee5 GM |
5581 | /*********************************************************************** |
5582 | Changing Frame Sizes | |
5583 | ***********************************************************************/ | |
4588ec20 JB |
5584 | |
5585 | #ifdef SIGWINCH | |
5f5c8ee5 | 5586 | |
9af30bdf | 5587 | static void |
971de7fb DN |
5588 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5589 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5590 | { |
5591 | int width, height; | |
4588ec20 JB |
5592 | int old_errno = errno; |
5593 | ||
28d7d09f | 5594 | struct tty_display_info *tty; |
4d553a13 | 5595 | |
333f1b6f JD |
5596 | signal (SIGWINCH, window_change_signal); |
5597 | SIGNAL_THREAD_CHECK (signalnum); | |
5598 | ||
9628b887 KL |
5599 | /* The frame size change obviously applies to a single |
5600 | termcap-controlled terminal, but we can't decide which. | |
5601 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5602 | */ |
5603 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5604 | |
0a125897 KL |
5605 | if (! tty->term_initted) |
5606 | continue; | |
4588ec20 | 5607 | |
db878925 DN |
5608 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5609 | use it. */ | |
5610 | if (!tty->input) | |
5611 | continue; | |
5612 | ||
0b0d3e0b | 5613 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5614 | |
bedeffcf | 5615 | if (width > 5 && height > 2) { |
9628b887 | 5616 | Lisp_Object tail, frame; |
3fc809e2 | 5617 | |
9628b887 | 5618 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5619 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5620 | /* Record the new sizes, but don't reallocate the data | |
5621 | structures now. Let that be done later outside of the | |
5622 | signal handler. */ | |
5623 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5624 | } |
4588ec20 | 5625 | } |
3fc809e2 | 5626 | |
4588ec20 JB |
5627 | errno = old_errno; |
5628 | } | |
5629 | #endif /* SIGWINCH */ | |
5630 | ||
5631 | ||
b96fd3e8 GM |
5632 | /* Do any change in frame size that was requested by a signal. SAFE |
5633 | non-zero means this function is called from a place where it is | |
5634 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5635 | |
dfcf069d | 5636 | void |
971de7fb | 5637 | do_pending_window_change (int safe) |
4588ec20 JB |
5638 | { |
5639 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5640 | if (redisplaying_p && !safe) |
5641 | return; | |
177c0ea7 | 5642 | |
4588ec20 JB |
5643 | while (delayed_size_change) |
5644 | { | |
35f56f96 | 5645 | Lisp_Object tail, frame; |
4588ec20 JB |
5646 | |
5647 | delayed_size_change = 0; | |
5648 | ||
35f56f96 | 5649 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5650 | { |
5f5c8ee5 | 5651 | struct frame *f = XFRAME (frame); |
35f56f96 | 5652 | |
7df02016 KS |
5653 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5654 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5655 | 0, 0, safe); | |
4588ec20 JB |
5656 | } |
5657 | } | |
5658 | } | |
5659 | ||
5660 | ||
502b9b64 | 5661 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5662 | indicate no change is to take place. |
4588ec20 | 5663 | |
b6a65ac2 JB |
5664 | If DELAY is non-zero, then assume we're being called from a signal |
5665 | handler, and queue the change for later - perhaps the next | |
5666 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5667 | from a signal handler. |
5668 | ||
5669 | SAFE non-zero means this function is called from a place where it's | |
5670 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5671 | |
dfcf069d | 5672 | void |
971de7fb | 5673 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5674 | { |
5675 | Lisp_Object tail, frame; | |
3826ea1a | 5676 | |
9628b887 | 5677 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5678 | { |
9628b887 KL |
5679 | /* On MS-DOS, all frames use the same screen, so a change in |
5680 | size affects all frames. Termcap now supports multiple | |
5681 | ttys. */ | |
45140e01 | 5682 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5683 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5684 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5685 | pretend, delay, safe); |
45140e01 RS |
5686 | } |
5687 | else | |
b96fd3e8 | 5688 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5689 | } |
5690 | ||
5691 | static void | |
971de7fb | 5692 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5693 | { |
7df02016 | 5694 | int new_frame_total_cols; |
d311d28c | 5695 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5696 | |
4588ec20 | 5697 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5698 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5699 | { |
7df02016 KS |
5700 | f->new_text_lines = newheight; |
5701 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5702 | delayed_size_change = 1; |
5703 | return; | |
5704 | } | |
5705 | ||
502b9b64 | 5706 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5707 | f->new_text_lines = 0; |
5708 | f->new_text_cols = 0; | |
b6a65ac2 | 5709 | |
08f7aa3e | 5710 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5711 | if (newheight == 0) |
7df02016 | 5712 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5713 | if (newwidth == 0) |
7df02016 | 5714 | newwidth = FRAME_COLS (f); |
3826ea1a | 5715 | |
3b95a6f9 | 5716 | /* Compute width of windows in F. */ |
b6a65ac2 | 5717 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5718 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5719 | |
3b95a6f9 MR |
5720 | /* This is the width of the frame with vertical scroll bars and fringe |
5721 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5722 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5723 | ||
b6a65ac2 | 5724 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5725 | /* Frame width may be unchanged but the text portion may change, for |
5726 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5727 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5728 | /* Text portion unchanged? */ |
5729 | && newwidth == FRAME_COLS (f) | |
5730 | /* Frame width unchanged? */ | |
5731 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5732 | return; |
5733 | ||
cbb95688 RS |
5734 | BLOCK_INPUT; |
5735 | ||
886a8a6c KH |
5736 | #ifdef MSDOS |
5737 | /* We only can set screen dimensions to certain values supported | |
5738 | by our video hardware. Try to find the smallest size greater | |
5739 | or equal to the requested dimensions. */ | |
5740 | dos_set_window_size (&newheight, &newwidth); | |
5741 | #endif | |
5742 | ||
7df02016 | 5743 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5744 | { |
562dd5e9 | 5745 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5746 | |
48e482e6 EZ |
5747 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5748 | manipulating video hardware. */ | |
5749 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5750 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5751 | } |
5752 | ||
7df02016 | 5753 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5754 | { |
562dd5e9 | 5755 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5756 | |
48e482e6 EZ |
5757 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5758 | manipulating video hardware. */ | |
5759 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5760 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5761 | |
9ea173e8 | 5762 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5763 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5764 | } |
5765 | ||
7df02016 KS |
5766 | FRAME_LINES (f) = newheight; |
5767 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5768 | |
5f5c8ee5 GM |
5769 | { |
5770 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5771 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5772 | |
5f5c8ee5 GM |
5773 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5774 | &text_area_height); | |
5775 | if (w->cursor.x >= text_area_x + text_area_width) | |
5776 | w->cursor.hpos = w->cursor.x = 0; | |
5777 | if (w->cursor.y >= text_area_y + text_area_height) | |
5778 | w->cursor.vpos = w->cursor.y = 0; | |
5779 | } | |
986e61b8 | 5780 | |
5f5c8ee5 | 5781 | adjust_glyphs (f); |
5f5c8ee5 | 5782 | calculate_costs (f); |
cb02fa39 GM |
5783 | SET_FRAME_GARBAGED (f); |
5784 | f->resized_p = 1; | |
97cf50e7 RS |
5785 | |
5786 | UNBLOCK_INPUT; | |
61730a69 | 5787 | |
e523f7e5 RS |
5788 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5789 | ||
ef264c42 | 5790 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5791 | |
5792 | unbind_to (count, Qnil); | |
4588ec20 | 5793 | } |
5f5c8ee5 GM |
5794 | |
5795 | ||
4588ec20 | 5796 | \f |
5f5c8ee5 GM |
5797 | /*********************************************************************** |
5798 | Terminal Related Lisp Functions | |
5799 | ***********************************************************************/ | |
5800 | ||
5801 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5802 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5803 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5804 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5805 | (Lisp_Object file) |
5f5c8ee5 | 5806 | { |
0b0d3e0b KL |
5807 | struct tty_display_info *tty; |
5808 | ||
7d2f1216 EZ |
5809 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5810 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5811 | error ("Current frame is not on a tty device"); |
5812 | ||
5813 | tty = CURTTY (); | |
5814 | ||
5815 | if (tty->termscript != 0) | |
e18c7093 KL |
5816 | { |
5817 | BLOCK_INPUT; | |
0b0d3e0b | 5818 | fclose (tty->termscript); |
e18c7093 KL |
5819 | UNBLOCK_INPUT; |
5820 | } | |
0b0d3e0b | 5821 | tty->termscript = 0; |
5f5c8ee5 GM |
5822 | |
5823 | if (! NILP (file)) | |
5824 | { | |
5825 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5826 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5827 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5828 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5829 | } | |
5830 | return Qnil; | |
5831 | } | |
5832 | ||
5833 | ||
4588ec20 | 5834 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5835 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5836 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5837 | Control characters in STRING will have terminal-dependent effects. |
5838 | ||
6ed8eeff | 5839 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5840 | It may be a terminal object, a frame, or nil for the terminal used by |
5841 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5842 | when TERMINAL is nil. */) | |
5842a27b | 5843 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5844 | { |
7cef7ce3 SM |
5845 | struct terminal *t = get_terminal (terminal, 1); |
5846 | FILE *out; | |
0b0d3e0b | 5847 | |
94f3db62 | 5848 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5849 | CHECK_STRING (string); |
2c1e4409 | 5850 | BLOCK_INPUT; |
0b0d3e0b | 5851 | |
6ed8eeff KL |
5852 | if (!t) |
5853 | error ("Unknown terminal device"); | |
0b0d3e0b | 5854 | |
7cef7ce3 SM |
5855 | if (t->type == output_initial) |
5856 | out = stdout; | |
5857 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5858 | error ("Device %d is not a termcap terminal device", t->id); | |
5859 | else | |
5860 | { | |
5861 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5862 | |
7cef7ce3 SM |
5863 | if (! tty->output) |
5864 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5865 | |
7cef7ce3 SM |
5866 | if (tty->termscript) |
5867 | { | |
5868 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5869 | fflush (tty->termscript); | |
5870 | } | |
5871 | out = tty->output; | |
4588ec20 | 5872 | } |
7cef7ce3 SM |
5873 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5874 | fflush (out); | |
2c1e4409 | 5875 | UNBLOCK_INPUT; |
4588ec20 JB |
5876 | return Qnil; |
5877 | } | |
5878 | ||
5f5c8ee5 | 5879 | |
a7ca3326 | 5880 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5881 | doc: /* Beep, or flash the screen. |
228299fa | 5882 | Also, unless an argument is given, |
7ee72033 | 5883 | terminate any keyboard macro currently executing. */) |
5842a27b | 5884 | (Lisp_Object arg) |
4588ec20 | 5885 | { |
efb859b4 | 5886 | if (!NILP (arg)) |
4588ec20 | 5887 | { |
7fa788da RS |
5888 | if (noninteractive) |
5889 | putchar (07); | |
5890 | else | |
385ed61f | 5891 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5892 | } |
5893 | else | |
5894 | bitch_at_user (); | |
5895 | ||
5896 | return Qnil; | |
5897 | } | |
5898 | ||
dfcf069d | 5899 | void |
971de7fb | 5900 | bitch_at_user (void) |
4588ec20 JB |
5901 | { |
5902 | if (noninteractive) | |
5903 | putchar (07); | |
5f5c8ee5 | 5904 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5905 | error ("Keyboard macro terminated by a command ringing the bell"); |
5906 | else | |
385ed61f | 5907 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5908 | } |
5909 | ||
5f5c8ee5 GM |
5910 | |
5911 | \f | |
5912 | /*********************************************************************** | |
5913 | Sleeping, Waiting | |
5914 | ***********************************************************************/ | |
5915 | ||
a7ca3326 | 5916 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5917 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5918 | SECONDS may be a floating-point value, meaning that you can wait for a |
5919 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5920 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5921 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5922 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5923 | { |
d311d28c | 5924 | double duration = extract_float (seconds); |
4588ec20 | 5925 | |
d311d28c PE |
5926 | if (!NILP (milliseconds)) |
5927 | { | |
5928 | CHECK_NUMBER (milliseconds); | |
5929 | duration += XINT (milliseconds) / 1000.0; | |
5930 | } | |
b07646f5 | 5931 | |
d35af63c PE |
5932 | if (0 < duration) |
5933 | { | |
5934 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5935 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5936 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5937 | } | |
4588ec20 JB |
5938 | |
5939 | return Qnil; | |
5940 | } | |
5941 | ||
5f5c8ee5 | 5942 | |
dcd1ca45 | 5943 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5944 | it does redisplay. |
f76475ad | 5945 | |
2bcac766 CY |
5946 | TIMEOUT is number of seconds to wait (float or integer), |
5947 | or t to wait forever. | |
902b9b6d KS |
5948 | READING is 1 if reading input. |
5949 | If DO_DISPLAY is >0 display process output while waiting. | |
5950 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5951 | */ | |
4588ec20 | 5952 | |
f76475ad | 5953 | Lisp_Object |
971de7fb | 5954 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 5955 | { |
d35af63c PE |
5956 | intmax_t sec; |
5957 | int nsec; | |
f222369e | 5958 | |
902b9b6d | 5959 | swallow_events (do_display); |
ccddf474 | 5960 | |
902b9b6d | 5961 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5962 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5963 | return Qnil; |
4588ec20 | 5964 | |
902b9b6d KS |
5965 | if (do_display >= 2) |
5966 | redisplay_preserve_echo_area (2); | |
5967 | ||
d35af63c | 5968 | if (INTEGERP (timeout)) |
2bcac766 | 5969 | { |
d35af63c PE |
5970 | sec = XINT (timeout); |
5971 | if (! (0 < sec)) | |
5972 | return Qt; | |
5973 | nsec = 0; | |
2bcac766 | 5974 | } |
d35af63c | 5975 | else if (FLOATP (timeout)) |
d311d28c | 5976 | { |
d35af63c PE |
5977 | double seconds = XFLOAT_DATA (timeout); |
5978 | if (! (0 < seconds)) | |
d311d28c | 5979 | return Qt; |
d35af63c PE |
5980 | else |
5981 | { | |
5982 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5983 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5984 | nsec = EMACS_NSECS (t); |
5985 | } | |
5986 | } | |
5987 | else if (EQ (timeout, Qt)) | |
5988 | { | |
5989 | sec = 0; | |
5990 | nsec = 0; | |
d311d28c | 5991 | } |
d35af63c PE |
5992 | else |
5993 | wrong_type_argument (Qnumberp, timeout); | |
5994 | ||
dfdb645c | 5995 | |
4588ec20 | 5996 | #ifdef SIGIO |
8fc798e9 | 5997 | gobble_input (0); |
f76475ad JB |
5998 | #endif |
5999 | ||
d35af63c | 6000 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6001 | Qnil, NULL, 0); |
f76475ad | 6002 | |
4588ec20 JB |
6003 | return detect_input_pending () ? Qnil : Qt; |
6004 | } | |
6005 | ||
5f5c8ee5 | 6006 | |
a7ca3326 | 6007 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
6008 | doc: /* Perform redisplay. |
6009 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
6010 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
6011 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
6012 | preempted by arriving input, so FORCE does nothing. | |
6013 | ||
6014 | Return t if redisplay was performed, nil if redisplay was preempted | |
6015 | immediately by pending input. */) | |
5842a27b | 6016 | (Lisp_Object force) |
f76475ad | 6017 | { |
d311d28c | 6018 | ptrdiff_t count; |
659d9874 | 6019 | |
902b9b6d KS |
6020 | swallow_events (1); |
6021 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6022 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6023 | || !NILP (Vexecuting_kbd_macro)) |
6024 | return Qnil; | |
f76475ad | 6025 | |
01327edf KS |
6026 | count = SPECPDL_INDEX (); |
6027 | if (!NILP (force) && !redisplay_dont_pause) | |
6028 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6029 | redisplay_preserve_echo_area (2); |
01327edf | 6030 | unbind_to (count, Qnil); |
7ba07a1a | 6031 | return Qt; |
f76475ad | 6032 | } |
5f5c8ee5 GM |
6033 | |
6034 | ||
6035 | \f | |
6036 | /*********************************************************************** | |
6037 | Other Lisp Functions | |
6038 | ***********************************************************************/ | |
6039 | ||
6040 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6041 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6042 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6043 | |
6044 | static Lisp_Object frame_and_buffer_state; | |
6045 | ||
6046 | ||
6047 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6048 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6049 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6050 | VARIABLE is a variable name whose value is either nil or a state vector |
6051 | that will be updated to contain all frames and buffers, | |
228299fa | 6052 | aside from buffers whose names start with space, |
44edd521 RS |
6053 | along with the buffers' read-only and modified flags. This allows a fast |
6054 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6055 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6056 | the current state. |
6057 | ||
6058 | If VARIABLE is nil, an internal variable is used. Users should not | |
6059 | pass nil for VARIABLE. */) | |
5842a27b | 6060 | (Lisp_Object variable) |
5f5c8ee5 | 6061 | { |
44edd521 RS |
6062 | Lisp_Object state, tail, frame, buf; |
6063 | Lisp_Object *vecp, *end; | |
54e1617f | 6064 | ptrdiff_t n; |
5f5c8ee5 | 6065 | |
44edd521 RS |
6066 | if (! NILP (variable)) |
6067 | { | |
6068 | CHECK_SYMBOL (variable); | |
6069 | state = Fsymbol_value (variable); | |
6070 | if (! VECTORP (state)) | |
6071 | goto changed; | |
6072 | } | |
6073 | else | |
6074 | state = frame_and_buffer_state; | |
6075 | ||
6076 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6077 | end = vecp + ASIZE (state); |
44edd521 | 6078 | |
5f5c8ee5 GM |
6079 | FOR_EACH_FRAME (tail, frame) |
6080 | { | |
44edd521 RS |
6081 | if (vecp == end) |
6082 | goto changed; | |
5f5c8ee5 GM |
6083 | if (!EQ (*vecp++, frame)) |
6084 | goto changed; | |
44edd521 RS |
6085 | if (vecp == end) |
6086 | goto changed; | |
5f5c8ee5 GM |
6087 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6088 | goto changed; | |
6089 | } | |
44edd521 | 6090 | /* Check that the buffer info matches. */ |
7539e11f | 6091 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6092 | { |
7539e11f | 6093 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6094 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6095 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6096 | continue; |
44edd521 RS |
6097 | if (vecp == end) |
6098 | goto changed; | |
5f5c8ee5 GM |
6099 | if (!EQ (*vecp++, buf)) |
6100 | goto changed; | |
44edd521 RS |
6101 | if (vecp == end) |
6102 | goto changed; | |
4b4deea2 | 6103 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6104 | goto changed; |
44edd521 RS |
6105 | if (vecp == end) |
6106 | goto changed; | |
5f5c8ee5 GM |
6107 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6108 | goto changed; | |
6109 | } | |
44edd521 RS |
6110 | if (vecp == end) |
6111 | goto changed; | |
5f5c8ee5 GM |
6112 | /* Detect deletion of a buffer at the end of the list. */ |
6113 | if (EQ (*vecp, Qlambda)) | |
6114 | return Qnil; | |
44edd521 RS |
6115 | |
6116 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6117 | changed: |
44edd521 RS |
6118 | /* Count the size we will need. |
6119 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6120 | n = 1; |
6121 | FOR_EACH_FRAME (tail, frame) | |
6122 | n += 2; | |
7539e11f | 6123 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6124 | n += 3; |
44edd521 RS |
6125 | /* Reallocate the vector if data has grown to need it, |
6126 | or if it has shrunk a lot. */ | |
6127 | if (! VECTORP (state) | |
77b37c05 PE |
6128 | || n > ASIZE (state) |
6129 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6130 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6131 | { |
6132 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6133 | if (! NILP (variable)) | |
6134 | Fset (variable, state); | |
6135 | else | |
6136 | frame_and_buffer_state = state; | |
6137 | } | |
6138 | ||
6139 | /* Record the new data in the (possibly reallocated) vector. */ | |
6140 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6141 | FOR_EACH_FRAME (tail, frame) |
6142 | { | |
6143 | *vecp++ = frame; | |
6144 | *vecp++ = XFRAME (frame)->name; | |
6145 | } | |
7539e11f | 6146 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6147 | { |
7539e11f | 6148 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6149 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6150 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6151 | continue; |
6152 | *vecp++ = buf; | |
4b4deea2 | 6153 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6154 | *vecp++ = Fbuffer_modified_p (buf); |
6155 | } | |
6156 | /* Fill up the vector with lambdas (always at least one). */ | |
6157 | *vecp++ = Qlambda; | |
44edd521 | 6158 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6159 | < ASIZE (state)) |
5f5c8ee5 GM |
6160 | *vecp++ = Qlambda; |
6161 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6162 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6163 | > ASIZE (state)) |
5f5c8ee5 GM |
6164 | abort (); |
6165 | return Qt; | |
6166 | } | |
6167 | ||
6168 | ||
4588ec20 | 6169 | \f |
5f5c8ee5 GM |
6170 | /*********************************************************************** |
6171 | Initialization | |
6172 | ***********************************************************************/ | |
6173 | ||
5f5c8ee5 GM |
6174 | /* Initialization done when Emacs fork is started, before doing stty. |
6175 | Determine terminal type and set terminal_driver. Then invoke its | |
6176 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6177 | |
dfcf069d | 6178 | void |
971de7fb | 6179 | init_display (void) |
4588ec20 | 6180 | { |
28d440ab KL |
6181 | char *terminal_type; |
6182 | ||
5f5c8ee5 GM |
6183 | /* Construct the space glyph. */ |
6184 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6185 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6186 | space_glyph.charpos = -1; |
6187 | ||
4588ec20 JB |
6188 | inverse_video = 0; |
6189 | cursor_in_echo_area = 0; | |
6190 | terminal_type = (char *) 0; | |
6191 | ||
1315c181 JB |
6192 | /* Now is the time to initialize this; it's used by init_sys_modes |
6193 | during startup. */ | |
2246281f | 6194 | Vinitial_window_system = Qnil; |
4588ec20 | 6195 | |
4181ad9c KL |
6196 | /* SIGWINCH needs to be handled no matter what display we start |
6197 | with. Otherwise newly opened tty frames will not resize | |
6198 | automatically. */ | |
6199 | #ifdef SIGWINCH | |
6200 | #ifndef CANNOT_DUMP | |
6201 | if (initialized) | |
6202 | #endif /* CANNOT_DUMP */ | |
6203 | signal (SIGWINCH, window_change_signal); | |
6204 | #endif /* SIGWINCH */ | |
4588ec20 | 6205 | |
d6ef42b9 | 6206 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6207 | if (IS_DAEMON) |
6208 | return; | |
d6ef42b9 | 6209 | |
1315c181 JB |
6210 | /* If the user wants to use a window system, we shouldn't bother |
6211 | initializing the terminal. This is especially important when the | |
6212 | terminal is so dumb that emacs gives up before and doesn't bother | |
6213 | using the window system. | |
4588ec20 | 6214 | |
36bbad1d KH |
6215 | If the DISPLAY environment variable is set and nonempty, |
6216 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6217 | |
6218 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6219 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6220 | { |
36bbad1d | 6221 | char *display; |
36bbad1d | 6222 | display = getenv ("DISPLAY"); |
36bbad1d | 6223 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6224 | |
6225 | if (display_arg && !x_display_ok (display)) | |
6226 | { | |
6227 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6228 | display); | |
6229 | inhibit_window_system = 1; | |
6230 | } | |
f040093a | 6231 | } |
d460af17 | 6232 | |
4fcc2638 | 6233 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6234 | { |
111d9af3 | 6235 | Vinitial_window_system = Qx; |
4588ec20 JB |
6236 | #ifdef HAVE_X11 |
6237 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6238 | #endif |
9311dcff | 6239 | #ifdef GNU_LINUX |
039e5d71 | 6240 | /* In some versions of ncurses, |
6a428f77 | 6241 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6242 | So call tgetent. */ |
6243 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6244 | #endif |
5f5c8ee5 | 6245 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6246 | return; |
6247 | } | |
6248 | #endif /* HAVE_X_WINDOWS */ | |
6249 | ||
fd2e066a | 6250 | #ifdef HAVE_NTGUI |
177c0ea7 | 6251 | if (!inhibit_window_system) |
fd2e066a | 6252 | { |
111d9af3 | 6253 | Vinitial_window_system = Qw32; |
fd2e066a | 6254 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6255 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6256 | return; |
6257 | } | |
6258 | #endif /* HAVE_NTGUI */ | |
6259 | ||
edfda783 AR |
6260 | #ifdef HAVE_NS |
6261 | if (!inhibit_window_system | |
6262 | #ifndef CANNOT_DUMP | |
6263 | && initialized | |
6264 | #endif | |
6265 | ) | |
6266 | { | |
111d9af3 | 6267 | Vinitial_window_system = Qns; |
5e617bc2 | 6268 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6269 | adjust_frame_glyphs_initially (); |
6270 | return; | |
6271 | } | |
6272 | #endif | |
6273 | ||
4588ec20 JB |
6274 | /* If no window system has been specified, try to use the terminal. */ |
6275 | if (! isatty (0)) | |
6276 | { | |
1559a86d | 6277 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6278 | exit (1); |
6279 | } | |
6280 | ||
6152361f JR |
6281 | #ifdef WINDOWSNT |
6282 | terminal_type = "w32console"; | |
6283 | #else | |
153a073c | 6284 | /* Look at the TERM variable. */ |
4588ec20 | 6285 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6286 | #endif |
4588ec20 JB |
6287 | if (!terminal_type) |
6288 | { | |
5d12ff0b | 6289 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6290 | if (! inhibit_window_system) |
6291 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6292 | else |
6293 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6294 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6295 | exit (1); |
6296 | } | |
6297 | ||
0a125897 | 6298 | { |
6ed8eeff | 6299 | struct terminal *t; |
3224dac1 KL |
6300 | struct frame *f = XFRAME (selected_frame); |
6301 | ||
6302 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6303 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6304 | |
6305 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6306 | if (f->output_method != output_initial) |
3224dac1 | 6307 | abort (); |
6ed8eeff KL |
6308 | f->output_method = t->type; |
6309 | f->terminal = t; | |
3224dac1 | 6310 | |
6ed8eeff | 6311 | t->reference_count++; |
7ac5dac9 EZ |
6312 | #ifdef MSDOS |
6313 | f->output_data.tty->display_info = &the_only_display_info; | |
6314 | #else | |
6315 | if (f->output_method == output_termcap) | |
6316 | create_tty_output (f); | |
6317 | #endif | |
6ed8eeff | 6318 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6319 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6320 | FrameRows (t->display_info.tty), |
6321 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6322 | |
6ed8eeff KL |
6323 | /* Delete the initial terminal. */ |
6324 | if (--initial_terminal->reference_count == 0 | |
6325 | && initial_terminal->delete_terminal_hook) | |
6326 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6327 | |
6328 | /* Update frame parameters to reflect the new type. */ | |
6329 | Fmodify_frame_parameters | |
6330 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6331 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6332 | if (t->display_info.tty->name) |
6333 | Fmodify_frame_parameters (selected_frame, | |
6334 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6335 | Qnil)); | |
6336 | else | |
6337 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6338 | Qnil)); | |
0a125897 | 6339 | } |
3fc809e2 | 6340 | |
d86c299a | 6341 | { |
91fb7e1b | 6342 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6343 | int width = FRAME_TOTAL_COLS (sf); |
6344 | int height = FRAME_LINES (sf); | |
d86c299a | 6345 | |
5f5c8ee5 | 6346 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6347 | change. It's not clear what better we could do. The rest of |
6348 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6349 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6350 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6351 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6352 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6353 | < (width + 2) * height)) | |
1559a86d | 6354 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6355 | } |
6356 | ||
5f5c8ee5 | 6357 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6358 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6359 | |
5f5c8ee5 GM |
6360 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6361 | if (initialized | |
6362 | && !noninteractive | |
2246281f | 6363 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6364 | { |
6365 | /* For the initial frame, we don't have any way of knowing what | |
6366 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6367 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6368 | |
f9d2fdc4 EZ |
6369 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6370 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6371 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6372 | } | |
5f5c8ee5 GM |
6373 | } |
6374 | ||
6375 | ||
6376 | \f | |
6377 | /*********************************************************************** | |
6378 | Blinking cursor | |
6379 | ***********************************************************************/ | |
6380 | ||
c3f13540 | 6381 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6382 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6383 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6384 | WINDOW nil means use the selected window. SHOW non-nil means |
6385 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6386 | don't show a cursor. */) |
5842a27b | 6387 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6388 | { |
5f5c8ee5 GM |
6389 | /* Don't change cursor state while redisplaying. This could confuse |
6390 | output routines. */ | |
6391 | if (!redisplaying_p) | |
6392 | { | |
6393 | if (NILP (window)) | |
6394 | window = selected_window; | |
6395 | else | |
b7826503 | 6396 | CHECK_WINDOW (window); |
177c0ea7 | 6397 | |
5d7791b3 | 6398 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6399 | } |
6400 | ||
6401 | return Qnil; | |
4588ec20 | 6402 | } |
5f5c8ee5 GM |
6403 | |
6404 | ||
5d7791b3 GM |
6405 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6406 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6407 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6408 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6409 | (Lisp_Object window) |
5d7791b3 GM |
6410 | { |
6411 | struct window *w; | |
177c0ea7 | 6412 | |
5d7791b3 GM |
6413 | if (NILP (window)) |
6414 | window = selected_window; | |
6415 | else | |
b7826503 | 6416 | CHECK_WINDOW (window); |
177c0ea7 | 6417 | |
5d7791b3 | 6418 | w = XWINDOW (window); |
177c0ea7 | 6419 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6420 | } |
6421 | ||
87478b52 SM |
6422 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6423 | Slast_nonminibuf_frame, 0, 0, 0, | |
6424 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6425 | (void) |
87478b52 | 6426 | { |
4958ed94 | 6427 | Lisp_Object frame = Qnil; |
87478b52 | 6428 | |
4958ed94 SM |
6429 | if (last_nonminibuf_frame) |
6430 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6431 | |
6432 | return frame; | |
6433 | } | |
4588ec20 | 6434 | \f |
5f5c8ee5 GM |
6435 | /*********************************************************************** |
6436 | Initialization | |
6437 | ***********************************************************************/ | |
6438 | ||
dfcf069d | 6439 | void |
971de7fb | 6440 | syms_of_display (void) |
4588ec20 | 6441 | { |
502b9b64 | 6442 | defsubr (&Sredraw_frame); |
4588ec20 | 6443 | defsubr (&Sredraw_display); |
078b3696 | 6444 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6445 | defsubr (&Sopen_termscript); |
6446 | defsubr (&Sding); | |
7ba07a1a | 6447 | defsubr (&Sredisplay); |
4588ec20 JB |
6448 | defsubr (&Ssleep_for); |
6449 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6450 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6451 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6452 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6453 | |
e509cfa6 | 6454 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6455 | defsubr (&Sdump_redisplay_history); |
6456 | #endif | |
6457 | ||
d1dad759 | 6458 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6459 | staticpro (&frame_and_buffer_state); |
6460 | ||
cd3520a4 JB |
6461 | DEFSYM (Qdisplay_table, "display-table"); |
6462 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6463 | |
29208e82 | 6464 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6465 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6466 | On most systems, changing this value will affect the amount of padding |
6467 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6468 | |
29208e82 | 6469 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6470 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6471 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6472 | |
29208e82 | 6473 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6474 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6475 | |
6476 | See also `ring-bell-function'. */); | |
177c0ea7 | 6477 | |
29208e82 | 6478 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6479 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6480 | A non-nil value is useful if the terminal can automatically preserve |
6481 | Emacs's frame display when you reenter Emacs. | |
6482 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6483 | |
29208e82 | 6484 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6485 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6486 | The value is a symbol: |
6487 | nil for a termcap frame (a character-only terminal), | |
6488 | 'x' for an Emacs frame that is really an X window, | |
6489 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6490 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6491 | 'pc' for a direct-write MS-DOS frame. | |
6492 | ||
6493 | Use of this variable as a boolean is deprecated. Instead, | |
6494 | use `display-graphic-p' or any of the other `display-*-p' | |
6495 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6496 | |
70b8d0a4 SM |
6497 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6498 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6499 | The value is a symbol: |
6500 | nil for a termcap frame (a character-only terminal), | |
6501 | 'x' for an Emacs frame that is really an X window, | |
6502 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6503 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6504 | 'pc' for a direct-write MS-DOS frame. | |
6505 | ||
6506 | Use of this variable as a boolean is deprecated. Instead, | |
6507 | use `display-graphic-p' or any of the other `display-*-p' | |
6508 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6509 | |
29208e82 | 6510 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6511 | doc: /* The version number of the window system in use. |
c22140f6 | 6512 | For X windows, this is 11. */); |
177c0ea7 | 6513 | |
29208e82 | 6514 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6515 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6516 | |
29208e82 | 6517 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6518 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6519 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6520 | Each element can be: | |
6521 | integer: a glyph code which this glyph is an alias for. | |
6522 | string: output this glyph using that string (not impl. in X windows). | |
6523 | nil: this glyph mod 524288 is the code of a character to output, | |
6524 | and this glyph / 524288 is the face number (see `face-id') to use | |
6525 | while outputting it. */); | |
4588ec20 JB |
6526 | Vglyph_table = Qnil; |
6527 | ||
29208e82 | 6528 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6529 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6530 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6531 | Vstandard_display_table = Qnil; |
6532 | ||
29208e82 | 6533 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6534 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6535 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6536 | |
d012c62b | 6537 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6538 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6539 | doc: /* Period in seconds between checking for input during redisplay. |
6540 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6541 | case, arriving input preempts redisplay until the input is processed. | |
6542 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6543 | Vredisplay_preemption_period = make_float (0.10); |
6544 | #endif | |
6545 | ||
4588ec20 JB |
6546 | #ifdef CANNOT_DUMP |
6547 | if (noninteractive) | |
6548 | #endif | |
6549 | { | |
2246281f | 6550 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6551 | Vwindow_system_version = Qnil; |
6552 | } | |
6553 | } |