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 GM |
67 | override this because their stdio internals differ. */ |
68 | ||
e3271ae5 | 69 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
70 | |
71 | /* The s- file might have overridden the definition with one that | |
72 | works for the system's C library. But we are using the GNU C | |
73 | library, so this is the right definition for every system. */ | |
74 | ||
3883a901 RS |
75 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
76 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
77 | #else | |
cb5558ff | 78 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 79 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
80 | #endif |
81 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
82 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
83 | #include <stdio_ext.h> | |
84 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
85 | #endif | |
cb5558ff | 86 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
87 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
88 | #endif | |
5f5c8ee5 GM |
89 | #endif /* not __GNU_LIBRARY__ */ |
90 | ||
9311dcff | 91 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) |
fa0ec9f4 DL |
92 | #include <term.h> /* for tgetent */ |
93 | #endif | |
5f5c8ee5 GM |
94 | \f |
95 | /* Structure to pass dimensions around. Used for character bounding | |
96 | boxes, glyph matrix dimensions and alike. */ | |
97 | ||
98 | struct dim | |
99 | { | |
100 | int width; | |
101 | int height; | |
102 | }; | |
103 | ||
104 | \f | |
105 | /* Function prototypes. */ | |
106 | ||
f57e2426 | 107 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
108 | static int required_matrix_height (struct window *); |
109 | static int required_matrix_width (struct window *); | |
f57e2426 | 110 | static void adjust_frame_glyphs (struct frame *); |
f57e2426 | 111 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); |
d311d28c | 112 | static void increment_row_positions (struct glyph_row *, ptrdiff_t, ptrdiff_t); |
f57e2426 J |
113 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
114 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
115 | struct window *); | |
116 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
117 | struct window *); | |
f57e2426 J |
118 | static void adjust_frame_message_buffer (struct frame *); |
119 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
120 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
f57e2426 J |
121 | static void clear_window_matrices (struct window *, int); |
122 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
123 | static int scrolling_window (struct window *, int); | |
124 | static int update_window_line (struct window *, int, int *); | |
f57e2426 | 125 | static void mirror_make_current (struct window *, int); |
e509cfa6 | 126 | #ifdef GLYPH_DEBUG |
f57e2426 J |
127 | static void check_matrix_pointers (struct glyph_matrix *, |
128 | struct glyph_matrix *); | |
b96fd3e8 | 129 | #endif |
f57e2426 J |
130 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
131 | static int update_window_tree (struct window *, int); | |
132 | static int update_window (struct window *, int); | |
133 | static int update_frame_1 (struct frame *, int, int); | |
5bf46f05 | 134 | static int scrolling (struct frame *); |
f57e2426 | 135 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
136 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
137 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 138 | |
5f5c8ee5 | 139 | \f |
d012c62b KS |
140 | /* Redisplay preemption timers. */ |
141 | ||
142 | static EMACS_TIME preemption_period; | |
143 | static EMACS_TIME preemption_next_check; | |
144 | ||
a41f8bed | 145 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 146 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 147 | |
502b9b64 | 148 | int frame_garbaged; |
4588ec20 | 149 | |
5f5c8ee5 | 150 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
151 | |
152 | int display_completed; | |
153 | ||
e7067d00 | 154 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 155 | |
4588ec20 | 156 | \f |
5f5c8ee5 | 157 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 158 | variable always equals the_only_frame. */ |
4588ec20 | 159 | |
91fb7e1b | 160 | Lisp_Object selected_frame; |
4588ec20 | 161 | |
5f5c8ee5 | 162 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 163 | frames. This is usually the most recent such frame that was |
87485d6f MW |
164 | selected. In a single-frame version, this variable always holds |
165 | the address of the_only_frame. */ | |
4588ec20 | 166 | |
5f5c8ee5 | 167 | struct frame *last_nonminibuf_frame; |
d52bad65 | 168 | |
5f5c8ee5 | 169 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 170 | |
5bf46f05 | 171 | static int delayed_size_change; |
4588ec20 | 172 | |
5f5c8ee5 | 173 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 174 | |
5f5c8ee5 | 175 | static int glyphs_initialized_initially_p; |
4588ec20 | 176 | |
5f5c8ee5 | 177 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 178 | |
5f5c8ee5 | 179 | struct window *updated_window; |
4588ec20 | 180 | |
5f5c8ee5 | 181 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 182 | |
5f5c8ee5 GM |
183 | struct glyph_row *updated_row; |
184 | int updated_area; | |
4588ec20 | 185 | |
5f5c8ee5 | 186 | /* A glyph for a space. */ |
4588ec20 | 187 | |
5f5c8ee5 | 188 | struct glyph space_glyph; |
4588ec20 | 189 | |
5f5c8ee5 GM |
190 | /* Counts of allocated structures. These counts serve to diagnose |
191 | memory leaks and double frees. */ | |
4588ec20 | 192 | |
5bf46f05 PE |
193 | static int glyph_matrix_count; |
194 | static int glyph_pool_count; | |
4588ec20 | 195 | |
5f5c8ee5 GM |
196 | /* If non-null, the frame whose frame matrices are manipulated. If |
197 | null, window matrices are worked on. */ | |
4588ec20 | 198 | |
5f5c8ee5 | 199 | static struct frame *frame_matrix_frame; |
4588ec20 | 200 | |
5f5c8ee5 GM |
201 | /* Non-zero means that fonts have been loaded since the last glyph |
202 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
203 | be adjusted when this flag becomes non-zero during display. The | |
204 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
205 | loaded on demand. Another reason is that a line contains many |
206 | characters displayed by zero width or very narrow glyphs of | |
207 | variable-width fonts. */ | |
836d2cde | 208 | |
5f5c8ee5 | 209 | int fonts_changed_p; |
836d2cde | 210 | |
177c0ea7 | 211 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 212 | This may only be used for terminal frames. */ |
836d2cde | 213 | |
e509cfa6 | 214 | #ifdef GLYPH_DEBUG |
4588ec20 | 215 | |
f57e2426 J |
216 | static int window_to_frame_vpos (struct window *, int); |
217 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
218 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
219 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 220 | |
9b0e97aa GM |
221 | /* One element of the ring buffer containing redisplay history |
222 | information. */ | |
223 | ||
224 | struct redisplay_history | |
225 | { | |
226 | char trace[512 + 100]; | |
227 | }; | |
228 | ||
229 | /* The size of the history buffer. */ | |
230 | ||
231 | #define REDISPLAY_HISTORY_SIZE 30 | |
232 | ||
233 | /* The redisplay history buffer. */ | |
234 | ||
235 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
236 | ||
237 | /* Next free entry in redisplay_history. */ | |
238 | ||
239 | static int history_idx; | |
240 | ||
241 | /* A tick that's incremented each time something is added to the | |
242 | history. */ | |
243 | ||
dfd153ae | 244 | static uprintmax_t history_tick; |
9b0e97aa | 245 | |
f57e2426 | 246 | static void add_frame_display_history (struct frame *, int); |
6a8aec41 | 247 | \f |
9b0e97aa GM |
248 | /* Add to the redisplay history how window W has been displayed. |
249 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 250 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
251 | has been interrupted for pending input. */ |
252 | ||
253 | static void | |
c56e0fd5 | 254 | add_window_display_history (struct window *w, const char *msg, int paused_p) |
9b0e97aa GM |
255 | { |
256 | char *buf; | |
177c0ea7 | 257 | |
9b0e97aa GM |
258 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
259 | history_idx = 0; | |
260 | buf = redisplay_history[history_idx].trace; | |
261 | ++history_idx; | |
177c0ea7 | 262 | |
8666506e PE |
263 | snprintf (buf, sizeof redisplay_history[0].trace, |
264 | "%"pMu": window %p (`%s')%s\n%s", | |
265 | history_tick++, | |
266 | w, | |
267 | ((BUFFERP (w->buffer) | |
268 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
269 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
270 | : "???"), | |
271 | paused_p ? " ***paused***" : "", | |
272 | msg); | |
9b0e97aa GM |
273 | } |
274 | ||
275 | ||
276 | /* Add to the redisplay history that frame F has been displayed. | |
277 | PAUSED_P non-zero means that the update has been interrupted for | |
278 | pending input. */ | |
279 | ||
280 | static void | |
59fc5cf9 | 281 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
282 | { |
283 | char *buf; | |
177c0ea7 | 284 | |
9b0e97aa GM |
285 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
286 | history_idx = 0; | |
287 | buf = redisplay_history[history_idx].trace; | |
288 | ++history_idx; | |
177c0ea7 | 289 | |
dfd153ae | 290 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
291 | history_tick++, |
292 | f, paused_p ? " ***paused***" : ""); | |
293 | } | |
294 | ||
295 | ||
a7ca3326 | 296 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 297 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 298 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 299 | (void) |
9b0e97aa GM |
300 | { |
301 | int i; | |
302 | ||
303 | for (i = history_idx - 1; i != history_idx; --i) | |
304 | { | |
305 | if (i < 0) | |
306 | i = REDISPLAY_HISTORY_SIZE - 1; | |
307 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
308 | } | |
309 | ||
310 | return Qnil; | |
311 | } | |
312 | ||
313 | ||
e509cfa6 | 314 | #else /* not GLYPH_DEBUG */ |
4588ec20 | 315 | |
7df02016 KS |
316 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
317 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 318 | |
e509cfa6 | 319 | #endif /* GLYPH_DEBUG */ |
4588ec20 | 320 | |
4588ec20 | 321 | |
9e4bf381 PE |
322 | #if (defined PROFILING \ |
323 | && (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__) \ | |
324 | && !HAVE___EXECUTABLE_START) | |
325 | /* This function comes first in the Emacs executable and is used only | |
326 | to estimate the text start for profiling. */ | |
4588ec20 | 327 | void |
9e4bf381 | 328 | __executable_start (void) |
4588ec20 | 329 | { |
72af86bd | 330 | abort (); |
177c0ea7 | 331 | } |
72af86bd | 332 | #endif |
5f5c8ee5 GM |
333 | \f |
334 | /*********************************************************************** | |
335 | Glyph Matrices | |
336 | ***********************************************************************/ | |
337 | ||
338 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
339 | pool from which memory for the matrix should be allocated, or null | |
340 | for window-based redisplay where no glyph pools are used. The | |
341 | member `pool' of the glyph matrix structure returned is set to | |
342 | POOL, the structure is otherwise zeroed. */ | |
343 | ||
5bf46f05 | 344 | static struct glyph_matrix * |
971de7fb | 345 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 346 | { |
5f5c8ee5 GM |
347 | struct glyph_matrix *result; |
348 | ||
349 | /* Allocate and clear. */ | |
350 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 351 | memset (result, 0, sizeof *result); |
4588ec20 | 352 | |
5f5c8ee5 GM |
353 | /* Increment number of allocated matrices. This count is used |
354 | to detect memory leaks. */ | |
355 | ++glyph_matrix_count; | |
4588ec20 | 356 | |
5f5c8ee5 GM |
357 | /* Set pool and return. */ |
358 | result->pool = pool; | |
359 | return result; | |
4588ec20 JB |
360 | } |
361 | ||
4588ec20 | 362 | |
5f5c8ee5 GM |
363 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
364 | ||
365 | The global counter glyph_matrix_count is decremented when a matrix | |
366 | is freed. If the count gets negative, more structures were freed | |
367 | than allocated, i.e. one matrix was freed more than once or a bogus | |
368 | pointer was passed to this function. | |
177c0ea7 | 369 | |
5f5c8ee5 GM |
370 | If MATRIX->pool is null, this means that the matrix manages its own |
371 | glyph memory---this is done for matrices on X frames. Freeing the | |
372 | matrix also frees the glyph memory in this case. */ | |
373 | ||
374 | static void | |
971de7fb | 375 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 376 | { |
5f5c8ee5 GM |
377 | if (matrix) |
378 | { | |
379 | int i; | |
380 | ||
381 | /* Detect the case that more matrices are freed than were | |
382 | allocated. */ | |
383 | if (--glyph_matrix_count < 0) | |
384 | abort (); | |
385 | ||
386 | /* Free glyph memory if MATRIX owns it. */ | |
387 | if (matrix->pool == NULL) | |
388 | for (i = 0; i < matrix->rows_allocated; ++i) | |
389 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 390 | |
5f5c8ee5 GM |
391 | /* Free row structures and the matrix itself. */ |
392 | xfree (matrix->rows); | |
393 | xfree (matrix); | |
394 | } | |
395 | } | |
4588ec20 | 396 | |
4588ec20 | 397 | |
5f5c8ee5 GM |
398 | /* Return the number of glyphs to reserve for a marginal area of |
399 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
400 | display line of window W. MARGIN gives the width of the marginal | |
401 | area in canonical character units. MARGIN should be an integer | |
402 | or a float. */ | |
403 | ||
404 | static int | |
971de7fb | 405 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
406 | { |
407 | int n; | |
4588ec20 | 408 | |
5f5c8ee5 | 409 | if (NUMBERP (margin)) |
4588ec20 | 410 | { |
7df02016 | 411 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
412 | double d = max (0, XFLOATINT (margin)); |
413 | d = min (width / 2 - 1, d); | |
35ec832e | 414 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
415 | } |
416 | else | |
417 | n = 0; | |
418 | ||
419 | return n; | |
420 | } | |
421 | ||
e509cfa6 DA |
422 | /* Return non-zero if ROW's hash value is correct, zero if not. |
423 | Optimized away if ENABLE_CHECKING is not defined. */ | |
424 | ||
a54e2c05 | 425 | static int |
7a7270dd EZ |
426 | verify_row_hash (struct glyph_row *row) |
427 | { | |
015137db | 428 | return row->hash == row_hash (row); |
7a7270dd | 429 | } |
4588ec20 | 430 | |
5f5c8ee5 GM |
431 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
432 | window sizes. | |
4588ec20 | 433 | |
5f5c8ee5 GM |
434 | W is null if the function is called for a frame glyph matrix. |
435 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
436 | indices of the first column and row of MATRIX within the frame | |
437 | matrix, if such a matrix exists. They are zero for purely | |
438 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 439 | |
5f5c8ee5 GM |
440 | In window-based redisplay, where no frame matrices exist, glyph |
441 | matrices manage their own glyph storage. Otherwise, they allocate | |
442 | storage from a common frame glyph pool which can be found in | |
443 | MATRIX->pool. | |
23b0200c | 444 | |
5f5c8ee5 GM |
445 | The reason for this memory management strategy is to avoid complete |
446 | frame redraws if possible. When we allocate from a common pool, a | |
447 | change of the location or size of a sub-matrix within the pool | |
448 | requires a complete redisplay of the frame because we cannot easily | |
449 | make sure that the current matrices of all windows still agree with | |
450 | what is displayed on the screen. While this is usually fast, it | |
451 | leads to screen flickering. */ | |
23b0200c | 452 | |
5f5c8ee5 | 453 | static void |
971de7fb | 454 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
455 | { |
456 | int i; | |
457 | int new_rows; | |
458 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
459 | int header_line_changed_p = 0; |
460 | int header_line_p = 0; | |
5f5c8ee5 | 461 | int left = -1, right = -1; |
ca8a12a7 | 462 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 463 | |
6b61353c KH |
464 | /* See if W had a header line that has disappeared now, or vice versa. |
465 | Get W's size. */ | |
5f5c8ee5 GM |
466 | if (w) |
467 | { | |
6b61353c KH |
468 | window_box (w, -1, 0, 0, &window_width, &window_height); |
469 | ||
045dee35 GM |
470 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
471 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 472 | } |
045dee35 | 473 | matrix->header_line_p = header_line_p; |
23b0200c | 474 | |
6b61353c KH |
475 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
476 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
477 | haven't changed. This optimization is important because preserving |
478 | the matrix means preventing redisplay. */ | |
479 | if (matrix->pool == NULL) | |
480 | { | |
7df02016 KS |
481 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
482 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 483 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
484 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
485 | || right != matrix->right_margin_glyphs); | |
486 | ||
487 | if (!marginal_areas_changed_p | |
488 | && !fonts_changed_p | |
045dee35 | 489 | && !header_line_changed_p |
7df02016 KS |
490 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
491 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
492 | && matrix->window_height == window_height |
493 | && matrix->window_vscroll == w->vscroll | |
494 | && matrix->window_width == window_width) | |
495 | return; | |
496 | } | |
177c0ea7 | 497 | |
5f5c8ee5 GM |
498 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
499 | if (matrix->rows_allocated < dim.height) | |
500 | { | |
0065d054 | 501 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 502 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
503 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
504 | new_rows, INT_MAX, sizeof *matrix->rows); | |
505 | memset (matrix->rows + old_alloc, 0, | |
506 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
507 | } |
508 | else | |
509 | new_rows = 0; | |
60a8948a | 510 | |
5f5c8ee5 GM |
511 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
512 | on a frame not using window-based redisplay. Set up pointers for | |
513 | each row into the glyph pool. */ | |
514 | if (matrix->pool) | |
515 | { | |
a54e2c05 | 516 | eassert (matrix->pool->glyphs); |
177c0ea7 | 517 | |
5f5c8ee5 | 518 | if (w) |
60a8948a | 519 | { |
5f5c8ee5 | 520 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 521 | w->left_margin_cols); |
5f5c8ee5 | 522 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 523 | w->right_margin_cols); |
60a8948a | 524 | } |
5f5c8ee5 GM |
525 | else |
526 | left = right = 0; | |
177c0ea7 | 527 | |
5f5c8ee5 | 528 | for (i = 0; i < dim.height; ++i) |
60a8948a | 529 | { |
5f5c8ee5 | 530 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
531 | |
532 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
533 | = (matrix->pool->glyphs |
534 | + (y + i) * matrix->pool->ncolumns | |
535 | + x); | |
177c0ea7 | 536 | |
5f5c8ee5 GM |
537 | if (w == NULL |
538 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 539 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
540 | { |
541 | row->glyphs[TEXT_AREA] | |
542 | = row->glyphs[LEFT_MARGIN_AREA]; | |
543 | row->glyphs[RIGHT_MARGIN_AREA] | |
544 | = row->glyphs[TEXT_AREA] + dim.width; | |
545 | row->glyphs[LAST_AREA] | |
546 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
547 | } | |
548 | else | |
549 | { | |
550 | row->glyphs[TEXT_AREA] | |
551 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
552 | row->glyphs[RIGHT_MARGIN_AREA] | |
553 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
554 | row->glyphs[LAST_AREA] | |
555 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
556 | } | |
60a8948a | 557 | } |
177c0ea7 | 558 | |
5f5c8ee5 GM |
559 | matrix->left_margin_glyphs = left; |
560 | matrix->right_margin_glyphs = right; | |
561 | } | |
562 | else | |
563 | { | |
564 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
565 | its own memory. It is a window matrix for window-based redisplay. |
566 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
567 | if (dim.width > matrix->matrix_w |
568 | || new_rows | |
045dee35 | 569 | || header_line_changed_p |
5f5c8ee5 | 570 | || marginal_areas_changed_p) |
4588ec20 | 571 | { |
5f5c8ee5 GM |
572 | struct glyph_row *row = matrix->rows; |
573 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 574 | |
5f5c8ee5 GM |
575 | while (row < end) |
576 | { | |
577 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
578 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
579 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 580 | |
5f5c8ee5 GM |
581 | /* The mode line never has marginal areas. */ |
582 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 583 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
584 | { |
585 | row->glyphs[TEXT_AREA] | |
586 | = row->glyphs[LEFT_MARGIN_AREA]; | |
587 | row->glyphs[RIGHT_MARGIN_AREA] | |
588 | = row->glyphs[TEXT_AREA] + dim.width; | |
589 | row->glyphs[LAST_AREA] | |
590 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
591 | } | |
592 | else | |
593 | { | |
594 | row->glyphs[TEXT_AREA] | |
595 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
596 | row->glyphs[RIGHT_MARGIN_AREA] | |
597 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
598 | row->glyphs[LAST_AREA] | |
599 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
600 | } | |
601 | ++row; | |
602 | } | |
4588ec20 JB |
603 | } |
604 | ||
a54e2c05 | 605 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
606 | matrix->left_margin_glyphs = left; |
607 | matrix->right_margin_glyphs = right; | |
608 | } | |
177c0ea7 | 609 | |
5f5c8ee5 GM |
610 | /* Number of rows to be used by MATRIX. */ |
611 | matrix->nrows = dim.height; | |
a54e2c05 | 612 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 613 | |
b7b20fbd | 614 | if (w) |
5f5c8ee5 | 615 | { |
b7b20fbd | 616 | if (matrix == w->current_matrix) |
4588ec20 | 617 | { |
b7b20fbd GM |
618 | /* Mark rows in a current matrix of a window as not having |
619 | valid contents. It's important to not do this for | |
620 | desired matrices. When Emacs starts, it may already be | |
621 | building desired matrices when this function runs. */ | |
622 | if (window_width < 0) | |
623 | window_width = window_box_width (w, -1); | |
177c0ea7 | 624 | |
b7b20fbd GM |
625 | /* Optimize the case that only the height has changed (C-x 2, |
626 | upper window). Invalidate all rows that are no longer part | |
627 | of the window. */ | |
628 | if (!marginal_areas_changed_p | |
73d75a62 GM |
629 | && !header_line_changed_p |
630 | && new_rows == 0 | |
631 | && dim.width == matrix->matrix_w | |
7df02016 KS |
632 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
633 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 634 | && matrix->window_width == window_width) |
b7b20fbd | 635 | { |
dd42b31a GM |
636 | /* Find the last row in the window. */ |
637 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
638 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
639 | { | |
26447967 | 640 | ++i; |
dd42b31a GM |
641 | break; |
642 | } | |
b7b20fbd GM |
643 | |
644 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 645 | are invalidated below. */ |
b7b20fbd GM |
646 | if (INTEGERP (w->window_end_vpos) |
647 | && XFASTINT (w->window_end_vpos) >= i) | |
648 | w->window_end_valid = Qnil; | |
177c0ea7 | 649 | |
b7b20fbd GM |
650 | while (i < matrix->nrows) |
651 | matrix->rows[i++].enabled_p = 0; | |
652 | } | |
653 | else | |
654 | { | |
655 | for (i = 0; i < matrix->nrows; ++i) | |
656 | matrix->rows[i].enabled_p = 0; | |
657 | } | |
5f5c8ee5 | 658 | } |
b7b20fbd | 659 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 660 | { |
b7b20fbd GM |
661 | /* Rows in desired matrices always have to be cleared; |
662 | redisplay expects this is the case when it runs, so it | |
663 | had better be the case when we adjust matrices between | |
664 | redisplays. */ | |
5f5c8ee5 GM |
665 | for (i = 0; i < matrix->nrows; ++i) |
666 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 667 | } |
4588ec20 | 668 | } |
177c0ea7 JB |
669 | |
670 | ||
5f5c8ee5 GM |
671 | /* Remember last values to be able to optimize frame redraws. */ |
672 | matrix->matrix_x = x; | |
673 | matrix->matrix_y = y; | |
674 | matrix->matrix_w = dim.width; | |
675 | matrix->matrix_h = dim.height; | |
676 | ||
677 | /* Record the top y location and height of W at the time the matrix | |
678 | was last adjusted. This is used to optimize redisplay above. */ | |
679 | if (w) | |
4588ec20 | 680 | { |
7df02016 KS |
681 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
682 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
683 | matrix->window_height = window_height; |
684 | matrix->window_width = window_width; | |
685 | matrix->window_vscroll = w->vscroll; | |
686 | } | |
687 | } | |
4588ec20 | 688 | |
4588ec20 | 689 | |
5f5c8ee5 GM |
690 | /* Reverse the contents of rows in MATRIX between START and END. The |
691 | contents of the row at END - 1 end up at START, END - 2 at START + | |
692 | 1 etc. This is part of the implementation of rotate_matrix (see | |
693 | below). */ | |
d52bad65 | 694 | |
5f5c8ee5 | 695 | static void |
971de7fb | 696 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
697 | { |
698 | int i, j; | |
23b0200c | 699 | |
5f5c8ee5 GM |
700 | for (i = start, j = end - 1; i < j; ++i, --j) |
701 | { | |
702 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
703 | initialization. */ | |
704 | struct glyph_row temp; | |
705 | temp = matrix->rows[i]; | |
706 | matrix->rows[i] = matrix->rows[j]; | |
707 | matrix->rows[j] = temp; | |
708 | } | |
709 | } | |
23b0200c | 710 | |
23b0200c | 711 | |
5f5c8ee5 GM |
712 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
713 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
714 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
715 | row structures are moved around). | |
60a8948a | 716 | |
5f5c8ee5 GM |
717 | The algorithm used for rotating the vector was, I believe, first |
718 | described by Kernighan. See the vector R as consisting of two | |
719 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
720 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
721 | and reverse the result to get (ArBr)r which is BA. Similar for | |
722 | rotating right. */ | |
723 | ||
724 | void | |
971de7fb | 725 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
726 | { |
727 | if (by < 0) | |
728 | { | |
729 | /* Up (rotate left, i.e. towards lower indices). */ | |
730 | by = -by; | |
731 | reverse_rows (matrix, first, first + by); | |
732 | reverse_rows (matrix, first + by, last); | |
733 | reverse_rows (matrix, first, last); | |
734 | } | |
735 | else if (by > 0) | |
736 | { | |
737 | /* Down (rotate right, i.e. towards higher indices). */ | |
738 | reverse_rows (matrix, last - by, last); | |
739 | reverse_rows (matrix, first, last - by); | |
740 | reverse_rows (matrix, first, last); | |
741 | } | |
742 | } | |
743 | ||
744 | ||
745 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
746 | with indices START <= index < END. Increment positions by DELTA/ | |
747 | DELTA_BYTES. */ | |
748 | ||
749 | void | |
ace1712c | 750 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 751 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
752 | { |
753 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
754 | eassert (start >= 0 && start <= matrix->nrows); |
755 | eassert (end >= 0 && end <= matrix->nrows); | |
756 | eassert (start <= end); | |
5f5c8ee5 GM |
757 | |
758 | for (; start < end; ++start) | |
86c11ba1 | 759 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
760 | } |
761 | ||
762 | ||
763 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
764 | the row indices of the first and last + 1 row to enable. If | |
765 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
766 | ||
767 | void | |
971de7fb | 768 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 769 | { |
a54e2c05 DA |
770 | eassert (start <= end); |
771 | eassert (start >= 0 && start < matrix->nrows); | |
772 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 773 | |
5f5c8ee5 GM |
774 | for (; start < end; ++start) |
775 | matrix->rows[start].enabled_p = enabled_p != 0; | |
776 | } | |
777 | ||
778 | ||
779 | /* Clear MATRIX. | |
780 | ||
781 | This empties all rows in MATRIX by setting the enabled_p flag for | |
782 | all rows of the matrix to zero. The function prepare_desired_row | |
783 | will eventually really clear a row when it sees one with a zero | |
784 | enabled_p flag. | |
785 | ||
786 | Resets update hints to defaults value. The only update hint | |
787 | currently present is the flag MATRIX->no_scrolling_p. */ | |
788 | ||
789 | void | |
971de7fb | 790 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
791 | { |
792 | if (matrix) | |
793 | { | |
794 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
795 | matrix->no_scrolling_p = 0; | |
796 | } | |
797 | } | |
177c0ea7 | 798 | |
5f5c8ee5 GM |
799 | |
800 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
801 | Increment y-positions in glyph rows between START and END by DY, | |
802 | and recompute their visible height. */ | |
803 | ||
804 | void | |
971de7fb | 805 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
806 | { |
807 | int min_y, max_y; | |
177c0ea7 | 808 | |
a54e2c05 DA |
809 | eassert (start <= end); |
810 | eassert (start >= 0 && start < matrix->nrows); | |
811 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 812 | |
7df02016 KS |
813 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
814 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 815 | |
5f5c8ee5 GM |
816 | for (; start < end; ++start) |
817 | { | |
818 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 819 | |
5f5c8ee5 | 820 | row->y += dy; |
d6c747a4 | 821 | row->visible_height = row->height; |
177c0ea7 | 822 | |
5f5c8ee5 | 823 | if (row->y < min_y) |
d6c747a4 GM |
824 | row->visible_height -= min_y - row->y; |
825 | if (row->y + row->height > max_y) | |
826 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
827 | if (row->fringe_bitmap_periodic_p) |
828 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
829 | } |
830 | } | |
831 | ||
832 | ||
833 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
834 | invalid is done by setting enabled_p to zero for all rows in a | |
835 | current matrix. */ | |
836 | ||
837 | void | |
971de7fb | 838 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
839 | { |
840 | /* Clear frame current matrix, if we have one. */ | |
841 | if (f->current_matrix) | |
842 | clear_glyph_matrix (f->current_matrix); | |
843 | ||
844 | /* Clear the matrix of the menu bar window, if such a window exists. | |
845 | The menu bar window is currently used to display menus on X when | |
846 | no toolkit support is compiled in. */ | |
847 | if (WINDOWP (f->menu_bar_window)) | |
848 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
849 | ||
9ea173e8 GM |
850 | /* Clear the matrix of the tool-bar window, if any. */ |
851 | if (WINDOWP (f->tool_bar_window)) | |
852 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
853 | |
854 | /* Clear current window matrices. */ | |
a54e2c05 | 855 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
856 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
857 | } | |
858 | ||
859 | ||
860 | /* Clear out all display lines of F for a coming redisplay. */ | |
861 | ||
862 | void | |
971de7fb | 863 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
864 | { |
865 | if (f->desired_matrix) | |
866 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 867 | |
5f5c8ee5 GM |
868 | if (WINDOWP (f->menu_bar_window)) |
869 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
870 | ||
9ea173e8 GM |
871 | if (WINDOWP (f->tool_bar_window)) |
872 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
873 | |
874 | /* Do it for window matrices. */ | |
a54e2c05 | 875 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
876 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
877 | } | |
878 | ||
879 | ||
880 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
881 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
882 | ||
883 | static void | |
971de7fb | 884 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
885 | { |
886 | while (w) | |
887 | { | |
888 | if (!NILP (w->hchild)) | |
889 | { | |
a54e2c05 | 890 | eassert (WINDOWP (w->hchild)); |
5f5c8ee5 GM |
891 | clear_window_matrices (XWINDOW (w->hchild), desired_p); |
892 | } | |
893 | else if (!NILP (w->vchild)) | |
894 | { | |
a54e2c05 | 895 | eassert (WINDOWP (w->vchild)); |
5f5c8ee5 GM |
896 | clear_window_matrices (XWINDOW (w->vchild), desired_p); |
897 | } | |
898 | else | |
899 | { | |
900 | if (desired_p) | |
901 | clear_glyph_matrix (w->desired_matrix); | |
902 | else | |
903 | { | |
904 | clear_glyph_matrix (w->current_matrix); | |
905 | w->window_end_valid = Qnil; | |
906 | } | |
907 | } | |
908 | ||
909 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
910 | } | |
911 | } | |
912 | ||
913 | ||
914 | \f | |
915 | /*********************************************************************** | |
916 | Glyph Rows | |
917 | ||
918 | See dispextern.h for an overall explanation of glyph rows. | |
919 | ***********************************************************************/ | |
920 | ||
921 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
922 | changes in the glyph_row structure, i.e. addition or removal of | |
923 | structure members. */ | |
924 | ||
2cca872d KH |
925 | static struct glyph_row null_row; |
926 | ||
5f5c8ee5 | 927 | void |
971de7fb | 928 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
929 | { |
930 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
931 | |
932 | /* Save pointers. */ | |
933 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
934 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
935 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
936 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
937 | ||
938 | /* Clear. */ | |
939 | *row = null_row; | |
940 | ||
941 | /* Restore pointers. */ | |
942 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
943 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
944 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
945 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
946 | |
947 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
948 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
949 | Redisplay outputs such glyphs, and flickering effects were | |
950 | the result. This also depended on the contents of memory | |
951 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 952 | the code below. If the flickering is gone with that, chances |
45560b1a | 953 | are that the flickering has the same reason as here. */ |
72af86bd | 954 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 955 | #endif |
5f5c8ee5 GM |
956 | } |
957 | ||
958 | ||
959 | /* Make ROW an empty, enabled row of canonical character height, | |
960 | in window W starting at y-position Y. */ | |
961 | ||
962 | void | |
971de7fb | 963 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
964 | { |
965 | int min_y, max_y; | |
177c0ea7 | 966 | |
7df02016 KS |
967 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
968 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 969 | |
5f5c8ee5 GM |
970 | clear_glyph_row (row); |
971 | row->y = y; | |
408f5064 | 972 | row->ascent = row->phys_ascent = 0; |
7df02016 | 973 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 974 | row->visible_height = row->height; |
177c0ea7 | 975 | |
5f5c8ee5 | 976 | if (row->y < min_y) |
d6c747a4 GM |
977 | row->visible_height -= min_y - row->y; |
978 | if (row->y + row->height > max_y) | |
979 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
980 | |
981 | row->enabled_p = 1; | |
982 | } | |
983 | ||
984 | ||
985 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
986 | are the amounts by which to change positions. Note that the first | |
987 | glyph of the text area of a row can have a buffer position even if | |
988 | the used count of the text area is zero. Such rows display line | |
989 | ends. */ | |
990 | ||
5bf46f05 | 991 | static void |
ace1712c | 992 | increment_row_positions (struct glyph_row *row, |
d311d28c | 993 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
994 | { |
995 | int area, i; | |
996 | ||
997 | /* Increment start and end positions. */ | |
998 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
999 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1000 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1001 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1002 | CHARPOS (row->start.pos) += delta; |
1003 | BYTEPOS (row->start.pos) += delta_bytes; | |
1004 | CHARPOS (row->end.pos) += delta; | |
1005 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1006 | |
5cacdcfd KS |
1007 | if (!row->enabled_p) |
1008 | return; | |
1009 | ||
5f5c8ee5 GM |
1010 | /* Increment positions in glyphs. */ |
1011 | for (area = 0; area < LAST_AREA; ++area) | |
1012 | for (i = 0; i < row->used[area]; ++i) | |
1013 | if (BUFFERP (row->glyphs[area][i].object) | |
1014 | && row->glyphs[area][i].charpos > 0) | |
1015 | row->glyphs[area][i].charpos += delta; | |
1016 | ||
1017 | /* Capture the case of rows displaying a line end. */ | |
1018 | if (row->used[TEXT_AREA] == 0 | |
1019 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1020 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1021 | } | |
1022 | ||
1023 | ||
9af3e742 | 1024 | #if 0 |
5f5c8ee5 GM |
1025 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1026 | contents, i.e. glyph structure contents are exchanged between A and | |
1027 | B without changing glyph pointers in A and B. */ | |
1028 | ||
1029 | static void | |
1dae0f0a | 1030 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1031 | { |
1032 | int area; | |
1033 | ||
1034 | for (area = 0; area < LAST_AREA; ++area) | |
1035 | { | |
1036 | /* Number of glyphs to swap. */ | |
1037 | int max_used = max (a->used[area], b->used[area]); | |
1038 | ||
1039 | /* Start of glyphs in area of row A. */ | |
1040 | struct glyph *glyph_a = a->glyphs[area]; | |
1041 | ||
1042 | /* End + 1 of glyphs in area of row A. */ | |
1043 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1044 | ||
1045 | /* Start of glyphs in area of row B. */ | |
1046 | struct glyph *glyph_b = b->glyphs[area]; | |
1047 | ||
1048 | while (glyph_a < glyph_a_end) | |
1049 | { | |
1050 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1051 | initialization. */ | |
1052 | struct glyph temp; | |
1053 | temp = *glyph_a; | |
1054 | *glyph_a = *glyph_b; | |
1055 | *glyph_b = temp; | |
1056 | ++glyph_a; | |
1057 | ++glyph_b; | |
1058 | } | |
1059 | } | |
1060 | } | |
1061 | ||
9af3e742 | 1062 | #endif /* 0 */ |
5f5c8ee5 | 1063 | |
015137db EZ |
1064 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1065 | exchange the used[] array and the hash values of the rows, because | |
1066 | these should all go together for the row's hash value to be | |
1067 | correct. */ | |
5f5c8ee5 | 1068 | |
55d4c1b2 | 1069 | static inline void |
971de7fb | 1070 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1071 | { |
1072 | int i; | |
015137db EZ |
1073 | unsigned hash_tem = a->hash; |
1074 | ||
5f5c8ee5 GM |
1075 | for (i = 0; i < LAST_AREA + 1; ++i) |
1076 | { | |
1077 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1078 | |
5f5c8ee5 GM |
1079 | a->glyphs[i] = b->glyphs[i]; |
1080 | b->glyphs[i] = temp; | |
73055685 EZ |
1081 | if (i < LAST_AREA) |
1082 | { | |
1083 | short used_tem = a->used[i]; | |
1084 | ||
1085 | a->used[i] = b->used[i]; | |
1086 | b->used[i] = used_tem; | |
1087 | } | |
5f5c8ee5 | 1088 | } |
015137db EZ |
1089 | a->hash = b->hash; |
1090 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1091 | } |
1092 | ||
1093 | ||
1094 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1095 | that glyph pointers, the `used' counts, and the hash values in the |
1096 | structures are left unchanged. */ | |
5f5c8ee5 | 1097 | |
55d4c1b2 | 1098 | static inline void |
971de7fb | 1099 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1100 | { |
1101 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1102 | short used[LAST_AREA]; |
015137db | 1103 | unsigned hashval; |
5f5c8ee5 GM |
1104 | |
1105 | /* Save glyph pointers of TO. */ | |
72af86bd | 1106 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1107 | memcpy (used, to->used, sizeof to->used); |
1108 | hashval = to->hash; | |
5f5c8ee5 GM |
1109 | |
1110 | /* Do a structure assignment. */ | |
1111 | *to = *from; | |
1112 | ||
1113 | /* Restore original pointers of TO. */ | |
72af86bd | 1114 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1115 | memcpy (to->used, used, sizeof to->used); |
1116 | to->hash = hashval; | |
5f5c8ee5 GM |
1117 | } |
1118 | ||
1119 | ||
5f5c8ee5 GM |
1120 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1121 | assignment TO = FROM, except that glyph pointers are not copied but | |
1122 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1123 | a memory leak. */ | |
1124 | ||
55d4c1b2 | 1125 | static inline void |
971de7fb | 1126 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1127 | { |
1128 | swap_glyph_pointers (to, from); | |
1129 | copy_row_except_pointers (to, from); | |
1130 | } | |
1131 | ||
1132 | ||
1133 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1134 | a row in a window matrix, is a slice of the glyph memory of the | |
1135 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1136 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1137 | memory of FRAME_ROW. */ | |
1138 | ||
e509cfa6 | 1139 | #ifdef GLYPH_DEBUG |
9339e87f | 1140 | |
5f5c8ee5 | 1141 | static int |
59fc5cf9 | 1142 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1143 | { |
1144 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1145 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1146 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1147 | ||
1148 | return (frame_glyph_start <= window_glyph_start | |
1149 | && window_glyph_start < frame_glyph_end); | |
1150 | } | |
1151 | ||
9339e87f | 1152 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1153 | |
9af3e742 GM |
1154 | #if 0 |
1155 | ||
5f5c8ee5 GM |
1156 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1157 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1158 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1159 | ||
1160 | static struct glyph_row * | |
59fc5cf9 AS |
1161 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1162 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1163 | { |
1164 | int i; | |
1165 | ||
a54e2c05 | 1166 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1167 | |
1168 | for (i = 0; i < window_matrix->nrows; ++i) | |
1169 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1170 | frame_matrix->rows + row)) | |
1171 | break; | |
1172 | ||
1173 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1174 | } | |
1175 | ||
9af3e742 | 1176 | #endif /* 0 */ |
5f5c8ee5 GM |
1177 | |
1178 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1179 | i.e. they are only marked as to be cleared by setting their | |
1180 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1181 | call to this function really clears it. */ | |
1182 | ||
1183 | void | |
971de7fb | 1184 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1185 | { |
1186 | if (!row->enabled_p) | |
1187 | { | |
dfd153ae | 1188 | int rp = row->reversed_p; |
5009f85e | 1189 | |
5f5c8ee5 GM |
1190 | clear_glyph_row (row); |
1191 | row->enabled_p = 1; | |
5009f85e | 1192 | row->reversed_p = rp; |
5f5c8ee5 GM |
1193 | } |
1194 | } | |
1195 | ||
1196 | ||
1197 | /* Return a hash code for glyph row ROW. */ | |
1198 | ||
2f7c71a1 | 1199 | static int |
971de7fb | 1200 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1201 | { |
1202 | int hash = 0; | |
177c0ea7 | 1203 | |
5f5c8ee5 GM |
1204 | if (row->enabled_p) |
1205 | { | |
4cecaab8 MB |
1206 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1207 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1208 | ||
1209 | while (glyph < end) | |
1210 | { | |
1211 | int c = glyph->u.ch; | |
1212 | int face_id = glyph->face_id; | |
daf01701 | 1213 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1214 | c -= SPACEGLYPH; |
1215 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1216 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1217 | ++glyph; | |
1218 | } | |
5f5c8ee5 | 1219 | |
4cecaab8 MB |
1220 | if (hash == 0) |
1221 | hash = 1; | |
5f5c8ee5 GM |
1222 | } |
1223 | ||
1224 | return hash; | |
1225 | } | |
1226 | ||
1227 | ||
153a073c | 1228 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1229 | the number of characters in the line. If must_write_spaces is |
1230 | zero, leading and trailing spaces are ignored. */ | |
1231 | ||
dfd153ae | 1232 | static int |
971de7fb | 1233 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1234 | { |
1235 | struct glyph_row *row = matrix->rows + vpos; | |
1236 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1237 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1238 | int len; | |
1239 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1240 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1241 | |
1242 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1243 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1244 | { |
1245 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1246 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1247 | --end; |
1248 | ||
177c0ea7 | 1249 | /* All blank line. */ |
5f5c8ee5 GM |
1250 | if (end == beg) |
1251 | return 0; | |
1252 | ||
1253 | /* Skip over leading spaces. */ | |
1254 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1255 | ++beg; | |
1256 | } | |
1257 | ||
1258 | /* If we don't have a glyph-table, each glyph is one character, | |
1259 | so return the number of glyphs. */ | |
1260 | if (glyph_table_base == 0) | |
1261 | len = end - beg; | |
1262 | else | |
1263 | { | |
1264 | /* Otherwise, scan the glyphs and accumulate their total length | |
1265 | in LEN. */ | |
1266 | len = 0; | |
1267 | while (beg < end) | |
1268 | { | |
3fc809e2 | 1269 | GLYPH g; |
177c0ea7 | 1270 | |
3fc809e2 KS |
1271 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1272 | ||
565b39a8 | 1273 | if (GLYPH_INVALID_P (g) |
42186983 | 1274 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1275 | len += 1; |
1276 | else | |
1277 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1278 | |
5f5c8ee5 GM |
1279 | ++beg; |
1280 | } | |
1281 | } | |
177c0ea7 | 1282 | |
5f5c8ee5 GM |
1283 | return len; |
1284 | } | |
1285 | ||
1286 | ||
1287 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1288 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1289 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1290 | |
55d4c1b2 | 1291 | static inline int |
6b1f9ba4 | 1292 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 | 1293 | { |
a54e2c05 DA |
1294 | eassert (verify_row_hash (a)); |
1295 | eassert (verify_row_hash (b)); | |
7a7270dd | 1296 | |
5f5c8ee5 GM |
1297 | if (a == b) |
1298 | return 1; | |
1299 | else if (a->hash != b->hash) | |
1300 | return 0; | |
1301 | else | |
1302 | { | |
1303 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1304 | int area; | |
1305 | ||
e4e0bee9 GM |
1306 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1307 | return 0; | |
1308 | ||
5f5c8ee5 GM |
1309 | /* Compare glyphs. */ |
1310 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1311 | { | |
1312 | if (a->used[area] != b->used[area]) | |
1313 | return 0; | |
177c0ea7 | 1314 | |
5f5c8ee5 GM |
1315 | a_glyph = a->glyphs[area]; |
1316 | a_end = a_glyph + a->used[area]; | |
1317 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1318 | |
5f5c8ee5 GM |
1319 | while (a_glyph < a_end |
1320 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1321 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1322 | |
5f5c8ee5 GM |
1323 | if (a_glyph != a_end) |
1324 | return 0; | |
1325 | } | |
1326 | ||
6b61353c KH |
1327 | if (a->fill_line_p != b->fill_line_p |
1328 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1329 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1330 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1331 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1332 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1333 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1334 | || a->right_fringe_offset != b->right_fringe_offset |
1335 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1336 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1337 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1338 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1339 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1340 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1341 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1342 | /* Different partially visible characters on left margin. */ |
1343 | || a->x != b->x | |
1344 | /* Different height. */ | |
1345 | || a->ascent != b->ascent | |
408f5064 GM |
1346 | || a->phys_ascent != b->phys_ascent |
1347 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1348 | || a->visible_height != b->visible_height) |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | return 1; | |
1353 | } | |
1354 | ||
1355 | ||
1356 | \f | |
1357 | /*********************************************************************** | |
1358 | Glyph Pool | |
1359 | ||
1360 | See dispextern.h for an overall explanation of glyph pools. | |
1361 | ***********************************************************************/ | |
1362 | ||
1363 | /* Allocate a glyph_pool structure. The structure returned is | |
1364 | initialized with zeros. The global variable glyph_pool_count is | |
1365 | incremented for each pool allocated. */ | |
1366 | ||
1367 | static struct glyph_pool * | |
971de7fb | 1368 | new_glyph_pool (void) |
5f5c8ee5 GM |
1369 | { |
1370 | struct glyph_pool *result; | |
1371 | ||
1372 | /* Allocate a new glyph_pool and clear it. */ | |
1373 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1374 | memset (result, 0, sizeof *result); |
177c0ea7 | 1375 | |
5f5c8ee5 GM |
1376 | /* For memory leak and double deletion checking. */ |
1377 | ++glyph_pool_count; | |
177c0ea7 | 1378 | |
5f5c8ee5 GM |
1379 | return result; |
1380 | } | |
1381 | ||
1382 | ||
1383 | /* Free a glyph_pool structure POOL. The function may be called with | |
1384 | a null POOL pointer. The global variable glyph_pool_count is | |
1385 | decremented with every pool structure freed. If this count gets | |
1386 | negative, more structures were freed than allocated, i.e. one | |
1387 | structure must have been freed more than once or a bogus pointer | |
1388 | was passed to free_glyph_pool. */ | |
1389 | ||
1390 | static void | |
971de7fb | 1391 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1392 | { |
1393 | if (pool) | |
1394 | { | |
153a073c | 1395 | /* More freed than allocated? */ |
5f5c8ee5 | 1396 | --glyph_pool_count; |
a54e2c05 | 1397 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1398 | |
1399 | xfree (pool->glyphs); | |
1400 | xfree (pool); | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | ||
1405 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1406 | columns we need. This function never shrinks a pool. The only | |
1407 | case in which this would make sense, would be when a frame's size | |
1408 | is changed from a large value to a smaller one. But, if someone | |
1409 | does it once, we can expect that he will do it again. | |
1410 | ||
1411 | Value is non-zero if the pool changed in a way which makes | |
1412 | re-adjusting window glyph matrices necessary. */ | |
1413 | ||
1414 | static int | |
971de7fb | 1415 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1416 | { |
ca9ce8f2 | 1417 | ptrdiff_t needed; |
5f5c8ee5 GM |
1418 | int changed_p; |
1419 | ||
1420 | changed_p = (pool->glyphs == 0 | |
1421 | || matrix_dim.height != pool->nrows | |
1422 | || matrix_dim.width != pool->ncolumns); | |
1423 | ||
1424 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1425 | needed = matrix_dim.width; |
0065d054 PE |
1426 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1427 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1428 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1429 | if (needed > pool->nglyphs) |
1430 | { | |
0065d054 PE |
1431 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1432 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1433 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1434 | memset (pool->glyphs + old_nglyphs, 0, | |
1435 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1436 | } |
1437 | ||
153a073c | 1438 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1439 | to do sanity checks, and (b) the number of columns determines |
1440 | where rows in the frame matrix start---this must be available to | |
1441 | determine pointers to rows of window sub-matrices. */ | |
1442 | pool->nrows = matrix_dim.height; | |
1443 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1444 | |
5f5c8ee5 GM |
1445 | return changed_p; |
1446 | } | |
1447 | ||
1448 | ||
1449 | \f | |
1450 | /*********************************************************************** | |
1451 | Debug Code | |
1452 | ***********************************************************************/ | |
1453 | ||
e509cfa6 | 1454 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1455 | |
a13396c9 | 1456 | |
28d440ab KL |
1457 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1458 | XXX Maybe this should be changed to flush the current terminal instead of | |
1459 | stdout. | |
1460 | */ | |
a13396c9 | 1461 | |
85fece3e PE |
1462 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1463 | ||
a13396c9 | 1464 | void |
59fc5cf9 | 1465 | flush_stdout (void) |
a13396c9 GM |
1466 | { |
1467 | fflush (stdout); | |
1468 | } | |
1469 | ||
1470 | ||
5f5c8ee5 GM |
1471 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1472 | pointer has been lost, e.g. by using a structure assignment between | |
1473 | rows, at least one pointer must occur more than once in the rows of | |
1474 | MATRIX. */ | |
1475 | ||
1476 | void | |
59fc5cf9 | 1477 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1478 | { |
1479 | int i, j; | |
177c0ea7 | 1480 | |
5f5c8ee5 GM |
1481 | for (i = 0; i < matrix->nrows; ++i) |
1482 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1483 | eassert (i == j |
5f5c8ee5 GM |
1484 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1485 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1486 | } | |
1487 | ||
1488 | ||
1489 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1490 | ||
1491 | struct glyph_row * | |
59fc5cf9 | 1492 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1493 | { |
a54e2c05 DA |
1494 | eassert (matrix && matrix->rows); |
1495 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1496 | |
1497 | /* That's really too slow for normal testing because this function | |
1498 | is called almost everywhere. Although---it's still astonishingly | |
1499 | fast, so it is valuable to have for debugging purposes. */ | |
1500 | #if 0 | |
1501 | check_matrix_pointer_lossage (matrix); | |
1502 | #endif | |
177c0ea7 | 1503 | |
5f5c8ee5 GM |
1504 | return matrix->rows + row; |
1505 | } | |
1506 | ||
1507 | ||
1508 | #if 0 /* This function makes invalid assumptions when text is | |
1509 | partially invisible. But it might come handy for debugging | |
1510 | nevertheless. */ | |
1511 | ||
1512 | /* Check invariants that must hold for an up to date current matrix of | |
1513 | window W. */ | |
1514 | ||
1515 | static void | |
59fc5cf9 | 1516 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1517 | { |
1518 | struct glyph_matrix *matrix = w->current_matrix; | |
1519 | int yb = window_text_bottom_y (w); | |
1520 | struct glyph_row *row = matrix->rows; | |
1521 | struct glyph_row *last_text_row = NULL; | |
1522 | struct buffer *saved = current_buffer; | |
1523 | struct buffer *buffer = XBUFFER (w->buffer); | |
1524 | int c; | |
177c0ea7 | 1525 | |
5f5c8ee5 GM |
1526 | /* This can sometimes happen for a fresh window. */ |
1527 | if (matrix->nrows < 2) | |
1528 | return; | |
1529 | ||
1530 | set_buffer_temp (buffer); | |
1531 | ||
1532 | /* Note: last row is always reserved for the mode line. */ | |
1533 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1534 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1535 | { | |
1536 | struct glyph_row *next = row + 1; | |
1537 | ||
1538 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1539 | last_text_row = row; | |
1540 | ||
1541 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1542 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1543 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1544 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1545 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1546 | |
1547 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1548 | have such a position temporarily in case of a minibuffer | |
1549 | displaying something like `[Sole completion]' at its end. */ | |
1550 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1551 | { |
a54e2c05 | 1552 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1553 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1554 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1555 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1556 | } | |
5f5c8ee5 GM |
1557 | |
1558 | /* Check that end position of `row' is equal to start position | |
1559 | of next row. */ | |
1560 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1561 | { | |
a54e2c05 | 1562 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1563 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1564 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1565 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1566 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1567 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1568 | } |
1569 | row = next; | |
1570 | } | |
1571 | ||
a54e2c05 DA |
1572 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1573 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1574 | set_buffer_temp (saved); |
1575 | } | |
1576 | ||
1577 | #endif /* 0 */ | |
1578 | ||
e509cfa6 | 1579 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1580 | |
1581 | ||
1582 | \f | |
1583 | /********************************************************************** | |
1584 | Allocating/ Adjusting Glyph Matrices | |
1585 | **********************************************************************/ | |
1586 | ||
1587 | /* Allocate glyph matrices over a window tree for a frame-based | |
1588 | redisplay | |
1589 | ||
1590 | X and Y are column/row within the frame glyph matrix where | |
1591 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1592 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1593 | function is only interested in the result matrix dimension, and | |
1594 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1595 | |
1596 | The function returns the total width/height of the sub-matrices of | |
1597 | the window tree. If called on a frame root window, the computation | |
1598 | will take the mini-buffer window into account. | |
1599 | ||
1600 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1601 | ||
1602 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1603 | glyph matrices yet, and | |
1604 | ||
1605 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1606 | any window in the tree will be changed or have been changed (see | |
153a073c | 1607 | DIM_ONLY_P) |
5f5c8ee5 GM |
1608 | |
1609 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1610 | function. | |
1611 | ||
1612 | Windows are arranged into chains of windows on the same level | |
1613 | through the next fields of window structures. Such a level can be | |
1614 | either a sequence of horizontally adjacent windows from left to | |
1615 | right, or a sequence of vertically adjacent windows from top to | |
1616 | bottom. Each window in a horizontal sequence can be either a leaf | |
1617 | window or a vertical sequence; a window in a vertical sequence can | |
1618 | be either a leaf or a horizontal sequence. All windows in a | |
1619 | horizontal sequence have the same height, and all windows in a | |
1620 | vertical sequence have the same width. | |
1621 | ||
1622 | This function uses, for historical reasons, a more general | |
1623 | algorithm to determine glyph matrix dimensions that would be | |
1624 | necessary. | |
1625 | ||
1626 | The matrix height of a horizontal sequence is determined by the | |
1627 | maximum height of any matrix in the sequence. The matrix width of | |
1628 | a horizontal sequence is computed by adding up matrix widths of | |
1629 | windows in the sequence. | |
1630 | ||
1631 | |<------- result width ------->| | |
1632 | +---------+----------+---------+ --- | |
1633 | | | | | | | |
1634 | | | | | | |
1635 | +---------+ | | result height | |
1636 | | +---------+ | |
1637 | | | | | |
1638 | +----------+ --- | |
1639 | ||
1640 | The matrix width of a vertical sequence is the maximum matrix width | |
1641 | of any window in the sequence. Its height is computed by adding up | |
1642 | matrix heights of windows in the sequence. | |
1643 | ||
1644 | |<---- result width -->| | |
1645 | +---------+ --- | |
1646 | | | | | |
1647 | | | | | |
1648 | +---------+--+ | | |
1649 | | | | | |
1650 | | | result height | |
1651 | | | | |
1652 | +------------+---------+ | | |
1653 | | | | | |
1654 | | | | | |
1655 | +------------+---------+ --- */ | |
1656 | ||
1657 | /* Bit indicating that a new matrix will be allocated or has been | |
1658 | allocated. */ | |
1659 | ||
1660 | #define NEW_LEAF_MATRIX (1 << 0) | |
1661 | ||
1662 | /* Bit indicating that a matrix will or has changed its location or | |
1663 | size. */ | |
1664 | ||
1665 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1666 | ||
1667 | static struct dim | |
6f704c76 DN |
1668 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1669 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1670 | { |
1671 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1672 | int x0 = x, y0 = y; | |
1673 | int wmax = 0, hmax = 0; | |
1674 | struct dim total; | |
1675 | struct dim dim; | |
1676 | struct window *w; | |
1677 | int in_horz_combination_p; | |
1678 | ||
1679 | /* What combination is WINDOW part of? Compute this once since the | |
1680 | result is the same for all windows in the `next' chain. The | |
1681 | special case of a root window (parent equal to nil) is treated | |
1682 | like a vertical combination because a root window's `next' | |
1683 | points to the mini-buffer window, if any, which is arranged | |
1684 | vertically below other windows. */ | |
1685 | in_horz_combination_p | |
1686 | = (!NILP (XWINDOW (window)->parent) | |
1687 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1688 | ||
1689 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1690 | do |
5f5c8ee5 GM |
1691 | { |
1692 | w = XWINDOW (window); | |
1693 | ||
1694 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1695 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1696 | if (!NILP (w->hchild)) |
177c0ea7 | 1697 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1698 | dim_only_p, |
1699 | window_change_flags); | |
1700 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1701 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1702 | dim_only_p, |
1703 | window_change_flags); | |
1704 | else | |
1705 | { | |
1706 | /* If not already done, allocate sub-matrix structures. */ | |
1707 | if (w->desired_matrix == NULL) | |
1708 | { | |
1709 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1710 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1711 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1712 | } | |
177c0ea7 | 1713 | |
5f5c8ee5 GM |
1714 | /* Width and height MUST be chosen so that there are no |
1715 | holes in the frame matrix. */ | |
5d3cc43c GM |
1716 | dim.width = required_matrix_width (w); |
1717 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1718 | |
1719 | /* Will matrix be re-allocated? */ | |
1720 | if (x != w->desired_matrix->matrix_x | |
1721 | || y != w->desired_matrix->matrix_y | |
1722 | || dim.width != w->desired_matrix->matrix_w | |
1723 | || dim.height != w->desired_matrix->matrix_h | |
1724 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1725 | w->left_margin_cols) |
5f5c8ee5 GM |
1726 | != w->desired_matrix->left_margin_glyphs) |
1727 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1728 | w->right_margin_cols) |
5f5c8ee5 GM |
1729 | != w->desired_matrix->right_margin_glyphs)) |
1730 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1731 | ||
1732 | /* Actually change matrices, if allowed. Do not consider | |
1733 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1734 | may have been changed which we don't now here. We trust | |
1735 | that we only will be called with DIM_ONLY_P != 0 when | |
1736 | necessary. */ | |
1737 | if (!dim_only_p) | |
1738 | { | |
1739 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1740 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | /* If we are part of a horizontal combination, advance x for | |
1745 | windows to the right of W; otherwise advance y for windows | |
1746 | below W. */ | |
1747 | if (in_horz_combination_p) | |
1748 | x += dim.width; | |
177c0ea7 | 1749 | else |
5f5c8ee5 GM |
1750 | y += dim.height; |
1751 | ||
1752 | /* Remember maximum glyph matrix dimensions. */ | |
1753 | wmax = max (wmax, dim.width); | |
1754 | hmax = max (hmax, dim.height); | |
1755 | ||
1756 | /* Next window on same level. */ | |
1757 | window = w->next; | |
1758 | } | |
1759 | while (!NILP (window)); | |
1760 | ||
1761 | /* Set `total' to the total glyph matrix dimension of this window | |
1762 | level. In a vertical combination, the width is the width of the | |
1763 | widest window; the height is the y we finally reached, corrected | |
1764 | by the y we started with. In a horizontal combination, the total | |
1765 | height is the height of the tallest window, and the width is the | |
1766 | x we finally reached, corrected by the x we started with. */ | |
1767 | if (in_horz_combination_p) | |
1768 | { | |
1769 | total.width = x - x0; | |
1770 | total.height = hmax; | |
1771 | } | |
177c0ea7 | 1772 | else |
5f5c8ee5 GM |
1773 | { |
1774 | total.width = wmax; | |
1775 | total.height = y - y0; | |
1776 | } | |
1777 | ||
1778 | return total; | |
1779 | } | |
1780 | ||
1781 | ||
5d3cc43c GM |
1782 | /* Return the required height of glyph matrices for window W. */ |
1783 | ||
2f7c71a1 | 1784 | static int |
971de7fb | 1785 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1786 | { |
1787 | #ifdef HAVE_WINDOW_SYSTEM | |
1788 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1789 | |
5d3cc43c GM |
1790 | if (FRAME_WINDOW_P (f)) |
1791 | { | |
1792 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1793 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1794 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1795 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1796 | /* One partially visible line at the top and |
1797 | bottom of the window. */ | |
1798 | + 2 | |
153a073c | 1799 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1800 | + 2); |
1801 | } | |
1802 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1803 | |
7df02016 | 1804 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1805 | } |
1806 | ||
1807 | ||
1808 | /* Return the required width of glyph matrices for window W. */ | |
1809 | ||
2f7c71a1 | 1810 | static int |
971de7fb | 1811 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1812 | { |
1813 | #ifdef HAVE_WINDOW_SYSTEM | |
1814 | struct frame *f = XFRAME (w->frame); | |
1815 | if (FRAME_WINDOW_P (f)) | |
1816 | { | |
1817 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1818 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1819 | |
5d3cc43c GM |
1820 | /* Compute number of glyphs needed in a glyph row. */ |
1821 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1822 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1823 | /* 2 partially visible columns in the text area. */ |
1824 | + 2 | |
1825 | /* One partially visible column at the right | |
1826 | edge of each marginal area. */ | |
1827 | + 1 + 1); | |
1828 | } | |
1829 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1830 | ||
7df02016 | 1831 | return XINT (w->total_cols); |
5d3cc43c GM |
1832 | } |
1833 | ||
1834 | ||
5f5c8ee5 | 1835 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1836 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1837 | |
5f5c8ee5 | 1838 | static void |
971de7fb | 1839 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1840 | { |
5f5c8ee5 GM |
1841 | while (w) |
1842 | { | |
1843 | if (!NILP (w->vchild)) | |
5d3cc43c | 1844 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1845 | else if (!NILP (w->hchild)) |
5d3cc43c | 1846 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1847 | else |
1848 | { | |
1849 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1850 | struct dim dim; |
1851 | ||
1852 | /* If matrices are not yet allocated, allocate them now. */ | |
1853 | if (w->desired_matrix == NULL) | |
1854 | { | |
1855 | w->desired_matrix = new_glyph_matrix (NULL); | |
1856 | w->current_matrix = new_glyph_matrix (NULL); | |
1857 | } | |
1858 | ||
5d3cc43c GM |
1859 | dim.width = required_matrix_width (w); |
1860 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1861 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1862 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1863 | } | |
177c0ea7 | 1864 | |
5f5c8ee5 GM |
1865 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1866 | } | |
1867 | } | |
1868 | ||
1869 | ||
1870 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1871 | do it for all frames; otherwise do it just for the given frame. | |
1872 | This function must be called when a new frame is created, its size | |
1873 | changes, or its window configuration changes. */ | |
1874 | ||
1875 | void | |
971de7fb | 1876 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1877 | { |
408f5064 GM |
1878 | /* Block input so that expose events and other events that access |
1879 | glyph matrices are not processed while we are changing them. */ | |
1880 | BLOCK_INPUT; | |
1881 | ||
5f5c8ee5 GM |
1882 | if (f) |
1883 | adjust_frame_glyphs (f); | |
1884 | else | |
1885 | { | |
1886 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1887 | |
5f5c8ee5 GM |
1888 | FOR_EACH_FRAME (tail, lisp_frame) |
1889 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1890 | } | |
408f5064 GM |
1891 | |
1892 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1893 | } |
1894 | ||
1895 | ||
1896 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1897 | |
1898 | To be called from init_display. | |
1899 | ||
5f5c8ee5 GM |
1900 | We need a glyph matrix because redraw will happen soon. |
1901 | Unfortunately, window sizes on selected_frame are not yet set to | |
1902 | meaningful values. I believe we can assume that there are only two | |
1903 | windows on the frame---the mini-buffer and the root window. Frame | |
1904 | height and width seem to be correct so far. So, set the sizes of | |
1905 | windows to estimated values. */ | |
1906 | ||
1907 | static void | |
971de7fb | 1908 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1909 | { |
91fb7e1b GM |
1910 | struct frame *sf = SELECTED_FRAME (); |
1911 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1912 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1913 | int frame_lines = FRAME_LINES (sf); |
1914 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1915 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1916 | |
1917 | /* Do it for the root window. */ | |
7df02016 | 1918 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1919 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1920 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1921 | |
1922 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1923 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1924 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1925 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 1926 | |
91fb7e1b | 1927 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1928 | glyphs_initialized_initially_p = 1; |
1929 | } | |
177c0ea7 | 1930 | |
5f5c8ee5 GM |
1931 | |
1932 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1933 | ||
1934 | static void | |
971de7fb | 1935 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1936 | { |
1937 | if (FRAME_WINDOW_P (f)) | |
1938 | adjust_frame_glyphs_for_window_redisplay (f); | |
1939 | else | |
1940 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1941 | |
5f5c8ee5 GM |
1942 | /* Don't forget the message buffer and the buffer for |
1943 | decode_mode_spec. */ | |
1944 | adjust_frame_message_buffer (f); | |
1945 | adjust_decode_mode_spec_buffer (f); | |
1946 | ||
1947 | f->glyphs_initialized_p = 1; | |
1948 | } | |
1949 | ||
075757cc CY |
1950 | /* Return 1 if any window in the tree has nonzero window margins. See |
1951 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1952 | static int | |
971de7fb | 1953 | showing_window_margins_p (struct window *w) |
075757cc CY |
1954 | { |
1955 | while (w) | |
1956 | { | |
1957 | if (!NILP (w->hchild)) | |
1958 | { | |
1959 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1960 | return 1; | |
1961 | } | |
1962 | else if (!NILP (w->vchild)) | |
1963 | { | |
1964 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1965 | return 1; | |
1966 | } | |
1967 | else if (!NILP (w->left_margin_cols) | |
1968 | || !NILP (w->right_margin_cols)) | |
1969 | return 1; | |
3fc809e2 | 1970 | |
075757cc CY |
1971 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1972 | } | |
1973 | return 0; | |
1974 | } | |
1975 | ||
5f5c8ee5 | 1976 | |
c9f00270 GM |
1977 | /* In the window tree with root W, build current matrices of leaf |
1978 | windows from the frame's current matrix. */ | |
1979 | ||
1980 | static void | |
971de7fb | 1981 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1982 | { |
1983 | struct window *w; | |
177c0ea7 | 1984 | |
c9f00270 GM |
1985 | for (; !NILP (window); window = w->next) |
1986 | { | |
1987 | w = XWINDOW (window); | |
177c0ea7 | 1988 | |
c9f00270 GM |
1989 | if (!NILP (w->hchild)) |
1990 | fake_current_matrices (w->hchild); | |
1991 | else if (!NILP (w->vchild)) | |
1992 | fake_current_matrices (w->vchild); | |
1993 | else | |
1994 | { | |
1995 | int i; | |
1996 | struct frame *f = XFRAME (w->frame); | |
1997 | struct glyph_matrix *m = w->current_matrix; | |
1998 | struct glyph_matrix *fm = f->current_matrix; | |
1999 | ||
a54e2c05 DA |
2000 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2001 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2002 | |
c9f00270 GM |
2003 | for (i = 0; i < m->matrix_h; ++i) |
2004 | { | |
2005 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2006 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 2007 | |
a54e2c05 | 2008 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
2009 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
2010 | ||
2011 | r->enabled_p = fr->enabled_p; | |
2012 | if (r->enabled_p) | |
2013 | { | |
2014 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2015 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2016 | r->used[TEXT_AREA] = (m->matrix_w | |
2017 | - r->used[LEFT_MARGIN_AREA] | |
2018 | - r->used[RIGHT_MARGIN_AREA]); | |
2019 | r->mode_line_p = 0; | |
c9f00270 GM |
2020 | } |
2021 | } | |
2022 | } | |
2023 | } | |
2024 | } | |
2025 | ||
2026 | ||
bccee4f2 | 2027 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2028 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2029 | |
bccee4f2 | 2030 | static struct glyph_matrix * |
971de7fb | 2031 | save_current_matrix (struct frame *f) |
c9f00270 | 2032 | { |
bccee4f2 GM |
2033 | int i; |
2034 | struct glyph_matrix *saved; | |
e797dea6 | 2035 | |
bccee4f2 | 2036 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2037 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2038 | saved->nrows = f->current_matrix->nrows; |
2039 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2040 | * sizeof *saved->rows); | |
72af86bd | 2041 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2042 | |
2043 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2044 | { |
bccee4f2 GM |
2045 | struct glyph_row *from = f->current_matrix->rows + i; |
2046 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2047 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
bccee4f2 | 2048 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); |
72af86bd | 2049 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2050 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2051 | } |
bccee4f2 GM |
2052 | |
2053 | return saved; | |
2054 | } | |
2055 | ||
2056 | ||
2057 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2058 | and free memory associated with SAVED. */ | |
2059 | ||
2060 | static void | |
971de7fb | 2061 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2062 | { |
2063 | int i; | |
2064 | ||
2065 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2066 | { |
bccee4f2 GM |
2067 | struct glyph_row *from = saved->rows + i; |
2068 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2069 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2070 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2071 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2072 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2073 | } |
177c0ea7 | 2074 | |
bccee4f2 GM |
2075 | xfree (saved->rows); |
2076 | xfree (saved); | |
c9f00270 GM |
2077 | } |
2078 | ||
2079 | ||
bccee4f2 | 2080 | |
5f5c8ee5 GM |
2081 | /* Allocate/reallocate glyph matrices of a single frame F for |
2082 | frame-based redisplay. */ | |
2083 | ||
2084 | static void | |
971de7fb | 2085 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2086 | { |
5f5c8ee5 GM |
2087 | struct dim matrix_dim; |
2088 | int pool_changed_p; | |
2089 | int window_change_flags; | |
2090 | int top_window_y; | |
2091 | ||
2092 | if (!FRAME_LIVE_P (f)) | |
2093 | return; | |
2094 | ||
5f5c8ee5 GM |
2095 | top_window_y = FRAME_TOP_MARGIN (f); |
2096 | ||
2097 | /* Allocate glyph pool structures if not already done. */ | |
2098 | if (f->desired_pool == NULL) | |
2099 | { | |
2100 | f->desired_pool = new_glyph_pool (); | |
2101 | f->current_pool = new_glyph_pool (); | |
2102 | } | |
2103 | ||
2104 | /* Allocate frames matrix structures if needed. */ | |
2105 | if (f->desired_matrix == NULL) | |
2106 | { | |
2107 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2108 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2109 | } | |
177c0ea7 | 2110 | |
5f5c8ee5 GM |
2111 | /* Compute window glyph matrices. (This takes the mini-buffer |
2112 | window into account). The result is the size of the frame glyph | |
2113 | matrix needed. The variable window_change_flags is set to a bit | |
2114 | mask indicating whether new matrices will be allocated or | |
2115 | existing matrices change their size or location within the frame | |
2116 | matrix. */ | |
2117 | window_change_flags = 0; | |
2118 | matrix_dim | |
2119 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2120 | 0, top_window_y, | |
5d3cc43c | 2121 | 1, |
5f5c8ee5 GM |
2122 | &window_change_flags); |
2123 | ||
2124 | /* Add in menu bar lines, if any. */ | |
2125 | matrix_dim.height += top_window_y; | |
2126 | ||
2127 | /* Enlarge pools as necessary. */ | |
2128 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2129 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2130 | ||
177c0ea7 | 2131 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2132 | absolutely necessary since it requires a frame redraw. */ |
2133 | if (pool_changed_p || window_change_flags) | |
2134 | { | |
2135 | /* Do it for window matrices. */ | |
2136 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2137 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2138 | &window_change_flags); |
2139 | ||
2140 | /* Size of frame matrices must equal size of frame. Note | |
2141 | that we are called for X frames with window widths NOT equal | |
2142 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2143 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2144 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2145 | |
e797dea6 GM |
2146 | /* Pointers to glyph memory in glyph rows are exchanged during |
2147 | the update phase of redisplay, which means in general that a | |
2148 | frame's current matrix consists of pointers into both the | |
2149 | desired and current glyph pool of the frame. Adjusting a | |
2150 | matrix sets the frame matrix up so that pointers are all into | |
2151 | the same pool. If we want to preserve glyph contents of the | |
2152 | current matrix over a call to adjust_glyph_matrix, we must | |
2153 | make a copy of the current glyphs, and restore the current | |
2154 | matrix' contents from that copy. */ | |
2155 | if (display_completed | |
2156 | && !FRAME_GARBAGED_P (f) | |
2157 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2158 | && matrix_dim.height == f->current_matrix->matrix_h |
2159 | /* For some reason, the frame glyph matrix gets corrupted if | |
2160 | any of the windows contain margins. I haven't been able | |
2161 | to hunt down the reason, but for the moment this prevents | |
2162 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2163 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2164 | { |
bccee4f2 GM |
2165 | struct glyph_matrix *copy = save_current_matrix (f); |
2166 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2167 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2168 | restore_current_matrix (f, copy); |
e797dea6 GM |
2169 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2170 | } | |
c9f00270 | 2171 | else |
e797dea6 | 2172 | { |
bccee4f2 | 2173 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2174 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2175 | SET_FRAME_GARBAGED (f); | |
2176 | } | |
5f5c8ee5 GM |
2177 | } |
2178 | } | |
2179 | ||
2180 | ||
2181 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2182 | window-based redisplay. */ | |
2183 | ||
2184 | static void | |
971de7fb | 2185 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2186 | { |
a54e2c05 | 2187 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2188 | |
5f5c8ee5 | 2189 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2190 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2191 | |
8ce2650d | 2192 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2193 | /* Allocate/ reallocate matrices of the dummy window used to display |
2194 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2195 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2196 | { |
2197 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2198 | struct window *w; |
5f5c8ee5 GM |
2199 | if (NILP (f->menu_bar_window)) |
2200 | { | |
2201 | f->menu_bar_window = make_window (); | |
2202 | w = XWINDOW (f->menu_bar_window); | |
2203 | XSETFRAME (w->frame, f); | |
2204 | w->pseudo_window_p = 1; | |
2205 | } | |
2206 | else | |
2207 | w = XWINDOW (f->menu_bar_window); | |
2208 | ||
2209 | /* Set window dimensions to frame dimensions and allocate or | |
2210 | adjust glyph matrices of W. */ | |
7df02016 KS |
2211 | XSETFASTINT (w->top_line, 0); |
2212 | XSETFASTINT (w->left_col, 0); | |
2213 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2214 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2215 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2216 | } |
57714a86 YM |
2217 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2218 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2219 | |
488dd4c4 | 2220 | #ifndef USE_GTK |
d2d37ddc PE |
2221 | { |
2222 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2223 | don't have a tool bar window yet, make one. */ | |
2224 | struct window *w; | |
2225 | if (NILP (f->tool_bar_window)) | |
2226 | { | |
2227 | f->tool_bar_window = make_window (); | |
2228 | w = XWINDOW (f->tool_bar_window); | |
2229 | XSETFRAME (w->frame, f); | |
2230 | w->pseudo_window_p = 1; | |
2231 | } | |
2232 | else | |
9ea173e8 | 2233 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2234 | |
d2d37ddc PE |
2235 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2236 | XSETFASTINT (w->left_col, 0); | |
2237 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2238 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2239 | allocate_matrices_for_window_redisplay (w); | |
2240 | } | |
488dd4c4 | 2241 | #endif |
5f5c8ee5 GM |
2242 | } |
2243 | ||
2244 | ||
177c0ea7 | 2245 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2246 | |
5f5c8ee5 GM |
2247 | Note that the message buffer is never freed. Since I could not |
2248 | find a free in 19.34, I assume that freeing it would be | |
2249 | problematic in some way and don't do it either. | |
2250 | ||
2251 | (Implementation note: It should be checked if we can free it | |
2252 | eventually without causing trouble). */ | |
2253 | ||
2254 | static void | |
971de7fb | 2255 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2256 | { |
dfd153ae | 2257 | ptrdiff_t size = FRAME_MESSAGE_BUF_SIZE (f) + 1; |
5f5c8ee5 GM |
2258 | |
2259 | if (FRAME_MESSAGE_BUF (f)) | |
2260 | { | |
2261 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2262 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2263 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2264 | } | |
2265 | else | |
2266 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2267 | } | |
2268 | ||
2269 | ||
2270 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2271 | ||
2272 | static void | |
971de7fb | 2273 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2274 | { |
2275 | f->decode_mode_spec_buffer | |
2276 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2277 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2278 | } | |
2279 | ||
2280 | ||
2281 | \f | |
2282 | /********************************************************************** | |
2283 | Freeing Glyph Matrices | |
2284 | **********************************************************************/ | |
2285 | ||
2286 | /* Free glyph memory for a frame F. F may be null. This function can | |
2287 | be called for the same frame more than once. The root window of | |
2288 | F may be nil when this function is called. This is the case when | |
2289 | the function is called when F is destroyed. */ | |
2290 | ||
2291 | void | |
971de7fb | 2292 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2293 | { |
2294 | if (f && f->glyphs_initialized_p) | |
2295 | { | |
42f55fe0 GM |
2296 | /* Block interrupt input so that we don't get surprised by an X |
2297 | event while we're in an inconsistent state. */ | |
2298 | BLOCK_INPUT; | |
5f5c8ee5 | 2299 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2300 | |
5f5c8ee5 GM |
2301 | /* Release window sub-matrices. */ |
2302 | if (!NILP (f->root_window)) | |
2303 | free_window_matrices (XWINDOW (f->root_window)); | |
2304 | ||
2305 | /* Free the dummy window for menu bars without X toolkit and its | |
2306 | glyph matrices. */ | |
2307 | if (!NILP (f->menu_bar_window)) | |
2308 | { | |
2309 | struct window *w = XWINDOW (f->menu_bar_window); | |
2310 | free_glyph_matrix (w->desired_matrix); | |
2311 | free_glyph_matrix (w->current_matrix); | |
2312 | w->desired_matrix = w->current_matrix = NULL; | |
2313 | f->menu_bar_window = Qnil; | |
2314 | } | |
2315 | ||
9ea173e8 GM |
2316 | /* Free the tool bar window and its glyph matrices. */ |
2317 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2318 | { |
9ea173e8 | 2319 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2320 | free_glyph_matrix (w->desired_matrix); |
2321 | free_glyph_matrix (w->current_matrix); | |
2322 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2323 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2324 | } |
2325 | ||
2326 | /* Release frame glyph matrices. Reset fields to zero in | |
2327 | case we are called a second time. */ | |
2328 | if (f->desired_matrix) | |
2329 | { | |
2330 | free_glyph_matrix (f->desired_matrix); | |
2331 | free_glyph_matrix (f->current_matrix); | |
2332 | f->desired_matrix = f->current_matrix = NULL; | |
2333 | } | |
2334 | ||
2335 | /* Release glyph pools. */ | |
2336 | if (f->desired_pool) | |
2337 | { | |
2338 | free_glyph_pool (f->desired_pool); | |
2339 | free_glyph_pool (f->current_pool); | |
2340 | f->desired_pool = f->current_pool = NULL; | |
2341 | } | |
177c0ea7 | 2342 | |
42f55fe0 | 2343 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2344 | } |
2345 | } | |
2346 | ||
2347 | ||
2348 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2349 | function may be called with a null pointer, and it may be called on | |
2350 | the same tree more than once. */ | |
2351 | ||
2352 | void | |
971de7fb | 2353 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2354 | { |
2355 | while (w) | |
2356 | { | |
2357 | if (!NILP (w->hchild)) | |
2358 | free_window_matrices (XWINDOW (w->hchild)); | |
2359 | else if (!NILP (w->vchild)) | |
2360 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2361 | else |
5f5c8ee5 GM |
2362 | { |
2363 | /* This is a leaf window. Free its memory and reset fields | |
2364 | to zero in case this function is called a second time for | |
2365 | W. */ | |
2366 | free_glyph_matrix (w->current_matrix); | |
2367 | free_glyph_matrix (w->desired_matrix); | |
2368 | w->current_matrix = w->desired_matrix = NULL; | |
2369 | } | |
2370 | ||
2371 | /* Next window on same level. */ | |
2372 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | ||
2377 | /* Check glyph memory leaks. This function is called from | |
2378 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2379 | exits. We therefore free all glyph memory for all active frames | |
2380 | explicitly and check that nothing is left allocated. */ | |
2381 | ||
2382 | void | |
971de7fb | 2383 | check_glyph_memory (void) |
5f5c8ee5 GM |
2384 | { |
2385 | Lisp_Object tail, frame; | |
2386 | ||
2387 | /* Free glyph memory for all frames. */ | |
2388 | FOR_EACH_FRAME (tail, frame) | |
2389 | free_glyphs (XFRAME (frame)); | |
2390 | ||
2391 | /* Check that nothing is left allocated. */ | |
2392 | if (glyph_matrix_count) | |
2393 | abort (); | |
2394 | if (glyph_pool_count) | |
2395 | abort (); | |
2396 | } | |
2397 | ||
2398 | ||
2399 | \f | |
2400 | /********************************************************************** | |
2401 | Building a Frame Matrix | |
2402 | **********************************************************************/ | |
2403 | ||
2404 | /* Most of the redisplay code works on glyph matrices attached to | |
2405 | windows. This is a good solution most of the time, but it is not | |
2406 | suitable for terminal code. Terminal output functions cannot rely | |
2407 | on being able to set an arbitrary terminal window. Instead they | |
2408 | must be provided with a view of the whole frame, i.e. the whole | |
2409 | screen. We build such a view by constructing a frame matrix from | |
2410 | window matrices in this section. | |
2411 | ||
2412 | Windows that must be updated have their must_be_update_p flag set. | |
2413 | For all such windows, their desired matrix is made part of the | |
2414 | desired frame matrix. For other windows, their current matrix is | |
2415 | made part of the desired frame matrix. | |
2416 | ||
2417 | +-----------------+----------------+ | |
2418 | | desired | desired | | |
2419 | | | | | |
2420 | +-----------------+----------------+ | |
2421 | | current | | |
2422 | | | | |
2423 | +----------------------------------+ | |
2424 | ||
2425 | Desired window matrices can be made part of the frame matrix in a | |
2426 | cheap way: We exploit the fact that the desired frame matrix and | |
2427 | desired window matrices share their glyph memory. This is not | |
2428 | possible for current window matrices. Their glyphs are copied to | |
2429 | the desired frame matrix. The latter is equivalent to | |
2430 | preserve_other_columns in the old redisplay. | |
2431 | ||
2432 | Used glyphs counters for frame matrix rows are the result of adding | |
2433 | up glyph lengths of the window matrices. A line in the frame | |
2434 | matrix is enabled, if a corresponding line in a window matrix is | |
2435 | enabled. | |
177c0ea7 | 2436 | |
5f5c8ee5 GM |
2437 | After building the desired frame matrix, it will be passed to |
2438 | terminal code, which will manipulate both the desired and current | |
2439 | frame matrix. Changes applied to the frame's current matrix have | |
2440 | to be visible in current window matrices afterwards, of course. | |
2441 | ||
2442 | This problem is solved like this: | |
2443 | ||
2444 | 1. Window and frame matrices share glyphs. Window matrices are | |
2445 | constructed in a way that their glyph contents ARE the glyph | |
2446 | contents needed in a frame matrix. Thus, any modification of | |
2447 | glyphs done in terminal code will be reflected in window matrices | |
2448 | automatically. | |
177c0ea7 | 2449 | |
5f5c8ee5 GM |
2450 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2451 | intercepted by hook functions so that corresponding row operations | |
2452 | on window matrices can be performed. This is necessary because we | |
2453 | use pointers to glyphs in glyph row structures. To satisfy the | |
2454 | assumption of point 1 above that glyphs are updated implicitly in | |
2455 | window matrices when they are manipulated via the frame matrix, | |
2456 | window and frame matrix must of course agree where to find the | |
2457 | glyphs for their rows. Possible manipulations that must be | |
2458 | mirrored are assignments of rows of the desired frame matrix to the | |
2459 | current frame matrix and scrolling the current frame matrix. */ | |
2460 | ||
2461 | /* Build frame F's desired matrix from window matrices. Only windows | |
2462 | which have the flag must_be_updated_p set have to be updated. Menu | |
2463 | bar lines of a frame are not covered by window matrices, so make | |
2464 | sure not to touch them in this function. */ | |
2465 | ||
2466 | static void | |
971de7fb | 2467 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2468 | { |
2469 | int i; | |
2470 | ||
2471 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2472 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2473 | |
5f5c8ee5 GM |
2474 | /* Clear all rows in the frame matrix covered by window matrices. |
2475 | Menu bar lines are not covered by windows. */ | |
2476 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2477 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2478 | ||
2479 | /* Build the matrix by walking the window tree. */ | |
2480 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2481 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2482 | } | |
2483 | ||
2484 | ||
2485 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2486 | matrices. W is the root of a window tree. */ | |
2487 | ||
2488 | static void | |
971de7fb | 2489 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2490 | { |
2491 | while (w) | |
2492 | { | |
2493 | if (!NILP (w->hchild)) | |
2494 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2495 | else if (!NILP (w->vchild)) | |
2496 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2497 | else | |
2498 | build_frame_matrix_from_leaf_window (matrix, w); | |
2499 | ||
2500 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2501 | } | |
2502 | } | |
2503 | ||
2504 | ||
2505 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2506 | desired frame matrix built. W is a leaf window whose desired or | |
2507 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2508 | must_be_updated_p determines which matrix it contributes to | |
2509 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2510 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2511 | Adding a desired matrix means setting up used counters and such in | |
2512 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2513 | means copying glyphs. The latter case corresponds to | |
2514 | preserve_other_columns in the old redisplay. */ | |
2515 | ||
2516 | static void | |
971de7fb | 2517 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2518 | { |
2519 | struct glyph_matrix *window_matrix; | |
2520 | int window_y, frame_y; | |
2521 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2522 | GLYPH right_border_glyph; |
2523 | ||
2524 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2525 | |
2526 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2527 | if (w->must_be_updated_p) | |
2528 | { | |
2529 | window_matrix = w->desired_matrix; | |
2530 | ||
2531 | /* Decide whether we want to add a vertical border glyph. */ | |
2532 | if (!WINDOW_RIGHTMOST_P (w)) | |
2533 | { | |
2534 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2535 | Lisp_Object gc; |
b4e49aee | 2536 | |
3fc809e2 KS |
2537 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2538 | if (dp | |
d311d28c | 2539 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2540 | { |
2541 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2542 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2543 | } | |
b4e49aee | 2544 | |
3fc809e2 KS |
2545 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2546 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2547 | } |
2548 | } | |
2549 | else | |
2550 | window_matrix = w->current_matrix; | |
2551 | ||
2552 | /* For all rows in the window matrix and corresponding rows in the | |
2553 | frame matrix. */ | |
2554 | window_y = 0; | |
2555 | frame_y = window_matrix->matrix_y; | |
2556 | while (window_y < window_matrix->nrows) | |
2557 | { | |
2558 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2559 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2560 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2561 | |
2562 | /* Fill up the frame row with spaces up to the left margin of the | |
2563 | window row. */ | |
2564 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2565 | ||
2566 | /* Fill up areas in the window matrix row with spaces. */ | |
2567 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2568 | |
2569 | /* If only part of W's desired matrix has been built, and | |
2570 | window_row wasn't displayed, use the corresponding current | |
2571 | row instead. */ | |
2572 | if (window_matrix == w->desired_matrix | |
2573 | && !window_row->enabled_p) | |
2574 | { | |
2575 | window_row = w->current_matrix->rows + window_y; | |
2576 | current_row_p = 1; | |
2577 | } | |
177c0ea7 | 2578 | |
2a8bd25f | 2579 | if (current_row_p) |
5f5c8ee5 | 2580 | { |
2a8bd25f | 2581 | /* Copy window row to frame row. */ |
72af86bd AS |
2582 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2583 | window_row->glyphs[0], | |
2584 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2585 | } |
2586 | else | |
2587 | { | |
a54e2c05 | 2588 | eassert (window_row->enabled_p); |
177c0ea7 | 2589 | |
2a8bd25f GM |
2590 | /* Only when a desired row has been displayed, we want |
2591 | the corresponding frame row to be updated. */ | |
2592 | frame_row->enabled_p = 1; | |
177c0ea7 | 2593 | |
5f5c8ee5 GM |
2594 | /* Maybe insert a vertical border between horizontally adjacent |
2595 | windows. */ | |
3fc809e2 | 2596 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2597 | { |
2598 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2599 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2600 | } | |
2601 | ||
e509cfa6 | 2602 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2603 | /* Window row window_y must be a slice of frame row |
2604 | frame_y. */ | |
a54e2c05 | 2605 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2606 | |
5f5c8ee5 GM |
2607 | /* If rows are in sync, we don't have to copy glyphs because |
2608 | frame and window share glyphs. */ | |
177c0ea7 | 2609 | |
a38634ff | 2610 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2611 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2612 | #endif |
5f5c8ee5 GM |
2613 | } |
2614 | ||
2615 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2616 | up with spaces, and visit leaf windows from left to right it | |
2617 | can be done simply. */ | |
177c0ea7 | 2618 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2619 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2620 | ||
5f5c8ee5 GM |
2621 | /* Next row. */ |
2622 | ++window_y; | |
2623 | ++frame_y; | |
2624 | } | |
2625 | } | |
2626 | ||
5f81871e RS |
2627 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2628 | ID, return a glyph that has a realized face ID. | |
2629 | This is used for glyphs displayed specially and not part of the text; | |
2630 | for instance, vertical separators, truncation markers, etc. */ | |
2631 | ||
3fc809e2 | 2632 | void |
971de7fb | 2633 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2634 | { |
3fc809e2 | 2635 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2636 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2637 | if (lface_id > 0) | |
2638 | { | |
2639 | int face_id = merge_faces (XFRAME (w->frame), | |
2640 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2641 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2642 | } |
5f81871e | 2643 | } |
5f5c8ee5 GM |
2644 | |
2645 | /* Add spaces to a glyph row ROW in a window matrix. | |
2646 | ||
2647 | Each row has the form: | |
2648 | ||
2649 | +---------+-----------------------------+------------+ | |
2650 | | left | text | right | | |
2651 | +---------+-----------------------------+------------+ | |
2652 | ||
2653 | Left and right marginal areas are optional. This function adds | |
2654 | spaces to areas so that there are no empty holes between areas. | |
2655 | In other words: If the right area is not empty, the text area | |
2656 | is filled up with spaces up to the right area. If the text area | |
2657 | is not empty, the left area is filled up. | |
2658 | ||
2659 | To be called for frame-based redisplay, only. */ | |
2660 | ||
2661 | static void | |
971de7fb | 2662 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2663 | { |
2664 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2665 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2666 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2667 | } | |
2668 | ||
2669 | ||
2670 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2671 | frame-based redisplay only. */ | |
2672 | ||
2673 | static void | |
971de7fb | 2674 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2675 | { |
2676 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2677 | { | |
2678 | struct glyph *end = row->glyphs[area + 1]; | |
2679 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2680 | ||
2681 | while (text < end) | |
2682 | *text++ = space_glyph; | |
2683 | row->used[area] = text - row->glyphs[area]; | |
2684 | } | |
2685 | } | |
2686 | ||
2687 | ||
2688 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2689 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2690 | ||
2691 | static void | |
971de7fb | 2692 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2693 | { |
2694 | int i = row->used[TEXT_AREA]; | |
2695 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2696 | |
5f5c8ee5 GM |
2697 | while (i < upto) |
2698 | glyph[i++] = space_glyph; | |
2699 | ||
2700 | row->used[TEXT_AREA] = i; | |
2701 | } | |
2702 | ||
2703 | ||
2704 | \f | |
2705 | /********************************************************************** | |
2706 | Mirroring operations on frame matrices in window matrices | |
2707 | **********************************************************************/ | |
2708 | ||
2709 | /* Set frame being updated via frame-based redisplay to F. This | |
2710 | function must be called before updates to make explicit that we are | |
2711 | working on frame matrices or not. */ | |
2712 | ||
55d4c1b2 | 2713 | static inline void |
971de7fb | 2714 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2715 | { |
2716 | frame_matrix_frame = f; | |
2717 | } | |
2718 | ||
2719 | ||
2720 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2721 | DESIRED_MATRIX is the desired matrix corresponding to | |
2722 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2723 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2724 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2725 | done in frame matrices, and that we have to perform analogous | |
2726 | operations in window matrices of frame_matrix_frame. */ | |
2727 | ||
55d4c1b2 | 2728 | static inline void |
971de7fb | 2729 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2730 | { |
2731 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2732 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2733 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2734 | |
2735 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2736 | between both rows, and does a structure assignment otherwise. */ | |
2737 | assign_row (current_row, desired_row); | |
2738 | ||
2739 | /* Enable current_row to mark it as valid. */ | |
2740 | current_row->enabled_p = 1; | |
e876ff42 | 2741 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2742 | |
2743 | /* If we are called on frame matrices, perform analogous operations | |
2744 | for window matrices. */ | |
2745 | if (frame_matrix_frame) | |
2746 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2747 | } | |
2748 | ||
2749 | ||
2750 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2751 | W's frame which has been made current (by swapping pointers between | |
2752 | current and desired matrix). Perform analogous operations in the | |
2753 | matrices of leaf windows in the window tree rooted at W. */ | |
2754 | ||
2755 | static void | |
971de7fb | 2756 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2757 | { |
2758 | while (w) | |
2759 | { | |
2760 | if (!NILP (w->hchild)) | |
2761 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2762 | else if (!NILP (w->vchild)) | |
2763 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2764 | else | |
2765 | { | |
2766 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2767 | here because the checks performed in debug mode there | |
2768 | will not allow the conversion. */ | |
2769 | int row = frame_row - w->desired_matrix->matrix_y; | |
2770 | ||
2771 | /* If FRAME_ROW is within W, assign the desired row to the | |
2772 | current row (exchanging glyph pointers). */ | |
2773 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2774 | { | |
2775 | struct glyph_row *current_row | |
2776 | = MATRIX_ROW (w->current_matrix, row); | |
2777 | struct glyph_row *desired_row | |
2778 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2779 | |
2780 | if (desired_row->enabled_p) | |
2781 | assign_row (current_row, desired_row); | |
2782 | else | |
2783 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2784 | current_row->enabled_p = 1; |
d009ae66 EZ |
2785 | |
2786 | /* Set the Y coordinate of the mode/header line's row. | |
2787 | It is needed in draw_row_with_mouse_face to find the | |
2788 | screen coordinates. (Window-based redisplay sets | |
2789 | this in update_window, but no one seems to do that | |
2790 | for frame-based redisplay.) */ | |
2791 | if (current_row->mode_line_p) | |
2792 | current_row->y = row; | |
5f5c8ee5 GM |
2793 | } |
2794 | } | |
177c0ea7 | 2795 | |
5f5c8ee5 GM |
2796 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2797 | } | |
2798 | } | |
2799 | ||
2800 | ||
2801 | /* Perform row dance after scrolling. We are working on the range of | |
2802 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2803 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2804 | row I in the range 0 <= I < NLINES, the index of the original line | |
2805 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2806 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2807 | row 0 <= I < NLINES which is empty. | |
2808 | ||
2809 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2810 | |
5f5c8ee5 | 2811 | void |
6f704c76 DN |
2812 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2813 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2814 | { |
2815 | /* A copy of original rows. */ | |
2816 | struct glyph_row *old_rows; | |
2817 | ||
2818 | /* Rows to assign to. */ | |
2819 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2820 | |
5f5c8ee5 GM |
2821 | int i; |
2822 | ||
2823 | /* Make a copy of the original rows. */ | |
2824 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2825 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2826 | |
2827 | /* Assign new rows, maybe clear lines. */ | |
2828 | for (i = 0; i < nlines; ++i) | |
2829 | { | |
2830 | int enabled_before_p = new_rows[i].enabled_p; | |
2831 | ||
a54e2c05 DA |
2832 | eassert (i + unchanged_at_top < matrix->nrows); |
2833 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2834 | new_rows[i] = old_rows[copy_from[i]]; |
2835 | new_rows[i].enabled_p = enabled_before_p; | |
2836 | ||
2837 | /* RETAINED_P is zero for empty lines. */ | |
2838 | if (!retained_p[copy_from[i]]) | |
2839 | new_rows[i].enabled_p = 0; | |
2840 | } | |
2841 | ||
153a073c | 2842 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2843 | if (frame_matrix_frame) |
2844 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2845 | unchanged_at_top, nlines, copy_from, retained_p); | |
2846 | } | |
2847 | ||
2848 | ||
a13396c9 | 2849 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2850 | the current frame matrix. */ |
a13396c9 GM |
2851 | |
2852 | static void | |
971de7fb | 2853 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2854 | { |
2855 | struct frame *f = XFRAME (w->frame); | |
2856 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2857 | int left, right, x, width; |
a13396c9 | 2858 | |
5cb88111 | 2859 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a54e2c05 DA |
2860 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
2861 | eassert (!FRAME_WINDOW_P (f)); | |
a13396c9 | 2862 | |
7df02016 KS |
2863 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2864 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2865 | x = w->current_matrix->matrix_x; |
2866 | width = w->current_matrix->matrix_w; | |
2867 | ||
a13396c9 GM |
2868 | window_row = w->current_matrix->rows; |
2869 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2870 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2871 | |
5cb88111 | 2872 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2873 | { |
5cb88111 GM |
2874 | window_row->glyphs[LEFT_MARGIN_AREA] |
2875 | = frame_row->glyphs[0] + x; | |
2876 | window_row->glyphs[TEXT_AREA] | |
2877 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2878 | window_row->glyphs[LAST_AREA] | |
2879 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2880 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2881 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2882 | } |
2883 | } | |
2884 | ||
2885 | ||
2886 | /* Return the window in the window tree rooted in W containing frame | |
2887 | row ROW. Value is null if none is found. */ | |
2888 | ||
09ad5a91 | 2889 | static struct window * |
971de7fb | 2890 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2891 | { |
2892 | struct window *found = NULL; | |
177c0ea7 | 2893 | |
a13396c9 GM |
2894 | while (w && !found) |
2895 | { | |
2896 | if (!NILP (w->hchild)) | |
2897 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2898 | else if (!NILP (w->vchild)) | |
2899 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2900 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2901 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2902 | found = w; |
177c0ea7 | 2903 | |
a13396c9 GM |
2904 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2905 | } | |
2906 | ||
2907 | return found; | |
2908 | } | |
2909 | ||
2910 | ||
5f5c8ee5 GM |
2911 | /* Perform a line dance in the window tree rooted at W, after |
2912 | scrolling a frame matrix in mirrored_line_dance. | |
2913 | ||
2914 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2915 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2916 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2917 | I < NLINES, the index of the original line to move to I. This | |
2918 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2919 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2920 | which is empty. */ | |
2921 | ||
2922 | static void | |
971de7fb | 2923 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2924 | { |
2925 | while (w) | |
2926 | { | |
2927 | if (!NILP (w->hchild)) | |
2928 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2929 | nlines, copy_from, retained_p); | |
2930 | else if (!NILP (w->vchild)) | |
2931 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2932 | nlines, copy_from, retained_p); | |
2933 | else | |
2934 | { | |
2935 | /* W is a leaf window, and we are working on its current | |
2936 | matrix m. */ | |
2937 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2938 | int i, sync_p = 0; |
5f5c8ee5 GM |
2939 | struct glyph_row *old_rows; |
2940 | ||
2941 | /* Make a copy of the original rows of matrix m. */ | |
2942 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2943 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2944 | |
2945 | for (i = 0; i < nlines; ++i) | |
2946 | { | |
2947 | /* Frame relative line assigned to. */ | |
2948 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2949 | |
5f5c8ee5 GM |
2950 | /* Frame relative line assigned. */ |
2951 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2952 | |
5f5c8ee5 GM |
2953 | /* Window relative line assigned to. */ |
2954 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2955 | |
5f5c8ee5 GM |
2956 | /* Window relative line assigned. */ |
2957 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2958 | |
5f5c8ee5 GM |
2959 | /* Is assigned line inside window? */ |
2960 | int from_inside_window_p | |
2961 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2962 | |
a13396c9 GM |
2963 | /* Is assigned to line inside window? */ |
2964 | int to_inside_window_p | |
2965 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2966 | |
a13396c9 | 2967 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2968 | { |
5f5c8ee5 GM |
2969 | /* Enabled setting before assignment. */ |
2970 | int enabled_before_p; | |
177c0ea7 | 2971 | |
5f5c8ee5 GM |
2972 | /* Do the assignment. The enabled_p flag is saved |
2973 | over the assignment because the old redisplay did | |
2974 | that. */ | |
2975 | enabled_before_p = m->rows[window_to].enabled_p; | |
2976 | m->rows[window_to] = old_rows[window_from]; | |
2977 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2978 | |
5f5c8ee5 GM |
2979 | /* If frame line is empty, window line is empty, too. */ |
2980 | if (!retained_p[copy_from[i]]) | |
2981 | m->rows[window_to].enabled_p = 0; | |
2982 | } | |
a13396c9 GM |
2983 | else if (to_inside_window_p) |
2984 | { | |
2985 | /* A copy between windows. This is an infrequent | |
2986 | case not worth optimizing. */ | |
2987 | struct frame *f = XFRAME (w->frame); | |
2988 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
2989 | struct window *w2; | |
2990 | struct glyph_matrix *m2; | |
2991 | int m2_from; | |
2992 | ||
fe8b8401 | 2993 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2994 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2995 | -nw', FROM_FRAME sometimes has no associated window. | |
2996 | This check avoids a segfault if W2 is null. */ | |
2997 | if (w2) | |
2998 | { | |
2999 | m2 = w2->current_matrix; | |
3000 | m2_from = frame_from - m2->matrix_y; | |
3001 | copy_row_except_pointers (m->rows + window_to, | |
3002 | m2->rows + m2_from); | |
3003 | ||
3004 | /* If frame line is empty, window line is empty, too. */ | |
3005 | if (!retained_p[copy_from[i]]) | |
3006 | m->rows[window_to].enabled_p = 0; | |
3007 | } | |
a13396c9 GM |
3008 | sync_p = 1; |
3009 | } | |
3010 | else if (from_inside_window_p) | |
3011 | sync_p = 1; | |
5f5c8ee5 | 3012 | } |
a13396c9 GM |
3013 | |
3014 | /* If there was a copy between windows, make sure glyph | |
3015 | pointers are in sync with the frame matrix. */ | |
3016 | if (sync_p) | |
3017 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3018 | |
5f5c8ee5 GM |
3019 | /* Check that no pointers are lost. */ |
3020 | CHECK_MATRIX (m); | |
3021 | } | |
3022 | ||
3023 | /* Next window on same level. */ | |
3024 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3025 | } | |
3026 | } | |
3027 | ||
3028 | ||
e509cfa6 | 3029 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3030 | |
3031 | /* Check that window and frame matrices agree about their | |
3032 | understanding where glyphs of the rows are to find. For each | |
3033 | window in the window tree rooted at W, check that rows in the | |
3034 | matrices of leaf window agree with their frame matrices about | |
3035 | glyph pointers. */ | |
3036 | ||
85fece3e | 3037 | static void |
59fc5cf9 | 3038 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3039 | { |
3040 | while (w) | |
3041 | { | |
3042 | if (!NILP (w->hchild)) | |
3043 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3044 | else if (!NILP (w->vchild)) | |
3045 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3046 | else | |
60a8948a | 3047 | { |
5f5c8ee5 GM |
3048 | struct frame *f = XFRAME (w->frame); |
3049 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3050 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3051 | } |
177c0ea7 | 3052 | |
5f5c8ee5 GM |
3053 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3054 | } | |
3055 | } | |
3056 | ||
3057 | ||
3058 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3059 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3060 | each row in WINDOW_MATRIX check that it's a slice of the | |
3061 | corresponding frame row. If it isn't, abort. */ | |
3062 | ||
3063 | static void | |
59fc5cf9 AS |
3064 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3065 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3066 | { |
3067 | /* Row number in WINDOW_MATRIX. */ | |
3068 | int i = 0; | |
3069 | ||
3070 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3071 | int j = window_matrix->matrix_y; | |
3072 | ||
177c0ea7 | 3073 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3074 | slice of the row in the frame matrix. If it isn't we didn't |
3075 | mirror an operation on the frame matrix correctly. */ | |
3076 | while (i < window_matrix->nrows) | |
3077 | { | |
3078 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3079 | frame_matrix->rows + j)) | |
3080 | abort (); | |
3081 | ++i, ++j; | |
3082 | } | |
3083 | } | |
3084 | ||
e509cfa6 | 3085 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
3086 | |
3087 | ||
3088 | \f | |
3089 | /********************************************************************** | |
3090 | VPOS and HPOS translations | |
3091 | **********************************************************************/ | |
3092 | ||
e509cfa6 | 3093 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3094 | |
3095 | /* Translate vertical position VPOS which is relative to window W to a | |
3096 | vertical position relative to W's frame. */ | |
3097 | ||
3098 | static int | |
59fc5cf9 | 3099 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3100 | { |
a54e2c05 DA |
3101 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
3102 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 | 3103 | vpos += WINDOW_TOP_EDGE_LINE (w); |
a54e2c05 | 3104 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3105 | return vpos; |
3106 | } | |
3107 | ||
3108 | ||
3109 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3110 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3111 | |
3112 | static int | |
59fc5cf9 | 3113 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3114 | { |
a54e2c05 | 3115 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3116 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3117 | return hpos; |
3118 | } | |
177c0ea7 | 3119 | |
5f5c8ee5 GM |
3120 | #endif /* GLYPH_DEBUG */ |
3121 | ||
3122 | ||
3123 | \f | |
3124 | /********************************************************************** | |
3125 | Redrawing Frames | |
3126 | **********************************************************************/ | |
3127 | ||
a7ca3326 | 3128 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3129 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3130 | (Lisp_Object frame) |
5f5c8ee5 GM |
3131 | { |
3132 | struct frame *f; | |
3133 | ||
b7826503 | 3134 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3135 | f = XFRAME (frame); |
3136 | ||
3137 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3138 | (Implementation note: It still has to be checked why we are | |
3139 | called so early here). */ | |
3140 | if (!glyphs_initialized_initially_p) | |
3141 | return Qnil; | |
3142 | ||
3143 | update_begin (f); | |
3224dac1 | 3144 | #ifdef MSDOS |
f2adda5e | 3145 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3146 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3147 | #endif |
385ed61f | 3148 | clear_frame (f); |
5f5c8ee5 GM |
3149 | clear_current_matrices (f); |
3150 | update_end (f); | |
daf01701 | 3151 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3152 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3153 | windows_or_buffers_changed++; |
3154 | /* Mark all windows as inaccurate, so that every window will have | |
3155 | its redisplay done. */ | |
3156 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3157 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3158 | f->garbaged = 0; | |
3159 | return Qnil; | |
3160 | } | |
3161 | ||
3162 | ||
3163 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3164 | function redraw-frame. */ | |
3165 | ||
3166 | void | |
971de7fb | 3167 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3168 | { |
3169 | Lisp_Object frame; | |
3170 | XSETFRAME (frame, f); | |
3171 | Fredraw_frame (frame); | |
3172 | } | |
3173 | ||
3174 | ||
3175 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3176 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3177 | (void) |
5f5c8ee5 GM |
3178 | { |
3179 | Lisp_Object tail, frame; | |
3180 | ||
3181 | FOR_EACH_FRAME (tail, frame) | |
3182 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3183 | Fredraw_frame (frame); | |
3184 | ||
3185 | return Qnil; | |
3186 | } | |
3187 | ||
3188 | ||
5f5c8ee5 | 3189 | \f |
5f5c8ee5 GM |
3190 | /*********************************************************************** |
3191 | Frame Update | |
3192 | ***********************************************************************/ | |
4588ec20 | 3193 | |
5f5c8ee5 | 3194 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3195 | |
5f5c8ee5 GM |
3196 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3197 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3198 | scrolling. | |
177c0ea7 | 3199 | |
5f5c8ee5 | 3200 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3201 | |
5f5c8ee5 | 3202 | int |
971de7fb | 3203 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3204 | { |
3205 | /* 1 means display has been paused because of pending input. */ | |
3206 | int paused_p; | |
3207 | struct window *root_window = XWINDOW (f->root_window); | |
3208 | ||
a2130dbb KS |
3209 | if (redisplay_dont_pause) |
3210 | force_p = 1; | |
a2130dbb KS |
3211 | else if (NILP (Vredisplay_preemption_period)) |
3212 | force_p = 1; | |
3213 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3214 | { |
3215 | EMACS_TIME tm; | |
3216 | double p = XFLOATINT (Vredisplay_preemption_period); | |
d012c62b | 3217 | |
993d4ab6 KS |
3218 | if (detect_input_pending_ignore_squeezables ()) |
3219 | { | |
3220 | paused_p = 1; | |
3221 | goto do_pause; | |
3222 | } | |
3223 | ||
d012c62b | 3224 | EMACS_GET_TIME (tm); |
d35af63c | 3225 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
d012c62b KS |
3226 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); |
3227 | } | |
d012c62b | 3228 | |
5f5c8ee5 | 3229 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3230 | { |
5f5c8ee5 GM |
3231 | /* We are working on window matrix basis. All windows whose |
3232 | flag must_be_updated_p is set have to be updated. */ | |
3233 | ||
3234 | /* Record that we are not working on frame matrices. */ | |
3235 | set_frame_matrix_frame (NULL); | |
3236 | ||
3237 | /* Update all windows in the window tree of F, maybe stopping | |
3238 | when pending input is detected. */ | |
3239 | update_begin (f); | |
3240 | ||
3241 | /* Update the menu bar on X frames that don't have toolkit | |
3242 | support. */ | |
3243 | if (WINDOWP (f->menu_bar_window)) | |
3244 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3245 | ||
3246 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3247 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3248 | { |
9ea173e8 | 3249 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3250 | |
3251 | /* Update tool-bar window. */ | |
3252 | if (w->must_be_updated_p) | |
4588ec20 | 3253 | { |
153a073c PJ |
3254 | Lisp_Object tem; |
3255 | ||
5f5c8ee5 GM |
3256 | update_window (w, 1); |
3257 | w->must_be_updated_p = 0; | |
3258 | ||
3259 | /* Swap tool-bar strings. We swap because we want to | |
3260 | reuse strings. */ | |
9ea173e8 GM |
3261 | tem = f->current_tool_bar_string; |
3262 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3263 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3264 | } |
3265 | } | |
177c0ea7 | 3266 | |
5f5c8ee5 GM |
3267 | |
3268 | /* Update windows. */ | |
3269 | paused_p = update_window_tree (root_window, force_p); | |
3270 | update_end (f); | |
177c0ea7 | 3271 | |
6b61353c | 3272 | /* This flush is a performance bottleneck under X, |
e581a466 | 3273 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3274 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3275 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3276 | if (f->force_flush_display_p) |
e581a466 KL |
3277 | { |
3278 | FRAME_RIF (f)->flush_display (f); | |
3279 | f->force_flush_display_p = 0; | |
3280 | } | |
4588ec20 | 3281 | } |
5f5c8ee5 GM |
3282 | else |
3283 | { | |
3284 | /* We are working on frame matrix basis. Set the frame on whose | |
3285 | frame matrix we operate. */ | |
3286 | set_frame_matrix_frame (f); | |
3287 | ||
868dd24b | 3288 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3289 | build_frame_matrix (f); |
177c0ea7 | 3290 | |
868dd24b GM |
3291 | /* Update the display */ |
3292 | update_begin (f); | |
5f5c8ee5 | 3293 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3294 | update_end (f); |
3295 | ||
7d2f1216 | 3296 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3297 | { |
0b0d3e0b KL |
3298 | if (FRAME_TTY (f)->termscript) |
3299 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3300 | if (FRAME_TERMCAP_P (f)) |
3301 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3302 | } |
868dd24b | 3303 | |
5f5c8ee5 | 3304 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3305 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3306 | check_window_matrix_pointers (root_window); |
3307 | add_frame_display_history (f, paused_p); | |
3308 | #endif | |
5f5c8ee5 GM |
3309 | } |
3310 | ||
993d4ab6 | 3311 | do_pause: |
5f5c8ee5 GM |
3312 | /* Reset flags indicating that a window should be updated. */ |
3313 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3314 | |
868dd24b | 3315 | display_completed = !paused_p; |
5f5c8ee5 | 3316 | return paused_p; |
4588ec20 | 3317 | } |
5f5c8ee5 GM |
3318 | |
3319 | ||
4588ec20 | 3320 | \f |
5f5c8ee5 GM |
3321 | /************************************************************************ |
3322 | Window-based updates | |
3323 | ************************************************************************/ | |
3324 | ||
3325 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3326 | don't stop updating when input is pending. */ | |
3327 | ||
3328 | static int | |
971de7fb | 3329 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3330 | { |
3331 | int paused_p = 0; | |
177c0ea7 | 3332 | |
5f5c8ee5 GM |
3333 | while (w && !paused_p) |
3334 | { | |
3335 | if (!NILP (w->hchild)) | |
3336 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3337 | else if (!NILP (w->vchild)) | |
3338 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3339 | else if (w->must_be_updated_p) | |
3340 | paused_p |= update_window (w, force_p); | |
3341 | ||
3342 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3343 | } | |
3344 | ||
3345 | return paused_p; | |
3346 | } | |
3347 | ||
3348 | ||
3349 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3350 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3351 | ||
3352 | void | |
971de7fb | 3353 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3354 | { |
3355 | if (w->must_be_updated_p) | |
3356 | { | |
3357 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3358 | ||
3359 | /* Record that this is not a frame-based redisplay. */ | |
3360 | set_frame_matrix_frame (NULL); | |
3361 | ||
a2130dbb KS |
3362 | if (redisplay_dont_pause) |
3363 | force_p = 1; | |
a2130dbb KS |
3364 | else if (NILP (Vredisplay_preemption_period)) |
3365 | force_p = 1; | |
3366 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3367 | { |
3368 | EMACS_TIME tm; | |
3369 | double p = XFLOATINT (Vredisplay_preemption_period); | |
d012c62b KS |
3370 | |
3371 | EMACS_GET_TIME (tm); | |
d35af63c | 3372 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
d012c62b KS |
3373 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); |
3374 | } | |
d012c62b | 3375 | |
5f5c8ee5 GM |
3376 | /* Update W. */ |
3377 | update_begin (f); | |
3378 | update_window (w, force_p); | |
3379 | update_end (f); | |
4588ec20 | 3380 | |
5f5c8ee5 GM |
3381 | /* Reset flag in W. */ |
3382 | w->must_be_updated_p = 0; | |
3383 | } | |
3384 | } | |
4588ec20 | 3385 | |
93e023fc | 3386 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3387 | |
408f5064 GM |
3388 | /* Redraw lines from the current matrix of window W that are |
3389 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3390 | ||
3391 | static void | |
971de7fb | 3392 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3393 | { |
d8ee7803 | 3394 | int i; |
fa971ac3 | 3395 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3396 | |
408f5064 GM |
3397 | /* If rows overlapping others have been changed, the rows being |
3398 | overlapped have to be redrawn. This won't draw lines that have | |
3399 | already been drawn in update_window_line because overlapped_p in | |
3400 | desired rows is 0, so after row assignment overlapped_p in | |
3401 | current rows is 0. */ | |
3402 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3403 | { | |
e876ff42 | 3404 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3405 | |
3406 | if (!row->enabled_p) | |
3407 | break; | |
3408 | else if (row->mode_line_p) | |
3409 | continue; | |
177c0ea7 | 3410 | |
408f5064 GM |
3411 | if (row->overlapped_p) |
3412 | { | |
3413 | enum glyph_row_area area; | |
177c0ea7 | 3414 | |
408f5064 GM |
3415 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3416 | { | |
3417 | updated_row = row; | |
3418 | updated_area = area; | |
fa971ac3 KL |
3419 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3420 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3421 | if (row->used[area]) |
fa971ac3 KL |
3422 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3423 | row->used[area]); | |
3424 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3425 | } |
177c0ea7 | 3426 | |
408f5064 GM |
3427 | row->overlapped_p = 0; |
3428 | } | |
3429 | ||
e876ff42 | 3430 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3431 | break; |
3432 | } | |
3433 | } | |
3434 | ||
3435 | ||
3436 | /* Redraw lines from the current matrix of window W that overlap | |
3437 | others. YB is bottom-most y-position in W. */ | |
3438 | ||
3439 | static void | |
971de7fb | 3440 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3441 | { |
3442 | int i, bottom_y; | |
3443 | struct glyph_row *row; | |
fa971ac3 | 3444 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3445 | |
408f5064 GM |
3446 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3447 | { | |
3448 | row = w->current_matrix->rows + i; | |
3449 | ||
3450 | if (!row->enabled_p) | |
3451 | break; | |
3452 | else if (row->mode_line_p) | |
3453 | continue; | |
177c0ea7 | 3454 | |
408f5064 GM |
3455 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3456 | ||
b4b2c2ca | 3457 | if (row->overlapping_p) |
408f5064 | 3458 | { |
41124e06 YM |
3459 | int overlaps = 0; |
3460 | ||
b4b2c2ca | 3461 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3462 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3463 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3464 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3465 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3466 | overlaps |= OVERLAPS_SUCC; | |
3467 | ||
3468 | if (overlaps) | |
3469 | { | |
3470 | if (row->used[LEFT_MARGIN_AREA]) | |
3471 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3472 | ||
3473 | if (row->used[TEXT_AREA]) | |
3474 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3475 | ||
3476 | if (row->used[RIGHT_MARGIN_AREA]) | |
3477 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3478 | ||
c5e87d10 | 3479 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3480 | their display. */ |
3481 | if (overlaps & OVERLAPS_PRED) | |
3482 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3483 | if (overlaps & OVERLAPS_SUCC) | |
3484 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3485 | } | |
408f5064 GM |
3486 | } |
3487 | ||
3488 | if (bottom_y >= yb) | |
3489 | break; | |
3490 | } | |
3491 | } | |
3492 | ||
93e023fc KS |
3493 | #endif /* HAVE_WINDOW_SYSTEM */ |
3494 | ||
408f5064 | 3495 | |
09ad5a91 | 3496 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3497 | |
3498 | /* Check that no row in the current matrix of window W is enabled | |
3499 | which is below what's displayed in the window. */ | |
3500 | ||
09ad5a91 | 3501 | static void |
971de7fb | 3502 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3503 | { |
3504 | int last_seen_p = 0; | |
3505 | int i, yb = window_text_bottom_y (w); | |
3506 | ||
3507 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3508 | { | |
3509 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3510 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3511 | last_seen_p = 1; | |
3512 | else if (last_seen_p && row->enabled_p) | |
3513 | abort (); | |
3514 | } | |
3515 | } | |
3516 | ||
3517 | #endif /* GLYPH_DEBUG */ | |
3518 | ||
3519 | ||
5f5c8ee5 GM |
3520 | /* Update display of window W. FORCE_P non-zero means that we should |
3521 | not stop when detecting pending input. */ | |
3522 | ||
3523 | static int | |
971de7fb | 3524 | update_window (struct window *w, int force_p) |
4588ec20 | 3525 | { |
5f5c8ee5 GM |
3526 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3527 | int paused_p; | |
d012c62b | 3528 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3529 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3530 | #endif |
597cfb3f | 3531 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3532 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3533 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3534 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3535 | #endif |
5f5c8ee5 GM |
3536 | |
3537 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3538 | #if !PERIODIC_PREEMPTION_CHECKING |
3539 | if (!force_p) | |
a2d5fca0 | 3540 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3541 | #endif |
4588ec20 | 3542 | |
5f5c8ee5 GM |
3543 | /* If forced to complete the update, or if no input is pending, do |
3544 | the update. */ | |
8fd9a666 | 3545 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3546 | { |
5f5c8ee5 GM |
3547 | struct glyph_row *row, *end; |
3548 | struct glyph_row *mode_line_row; | |
56974e03 | 3549 | struct glyph_row *header_line_row; |
0bc32927 PE |
3550 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3551 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3552 | int n_updated = 0; | |
3553 | #endif | |
5f5c8ee5 GM |
3554 | |
3555 | rif->update_window_begin_hook (w); | |
3556 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3557 | row = desired_matrix->rows; |
3558 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3559 | |
394305db EZ |
3560 | /* Take note of the header line, if there is one. We will |
3561 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3562 | if (row->mode_line_p) |
56974e03 GM |
3563 | { |
3564 | header_line_row = row; | |
3565 | ++row; | |
3566 | } | |
3567 | else | |
3568 | header_line_row = NULL; | |
5f5c8ee5 GM |
3569 | |
3570 | /* Update the mode line, if necessary. */ | |
3571 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3572 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3573 | { | |
3574 | mode_line_row->y = yb; | |
3575 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3576 | desired_matrix), |
3577 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3578 | } |
3579 | ||
3580 | /* Find first enabled row. Optimizations in redisplay_internal | |
3581 | may lead to an update with only one row enabled. There may | |
3582 | be also completely empty matrices. */ | |
3583 | while (row < end && !row->enabled_p) | |
3584 | ++row; | |
177c0ea7 | 3585 | |
bfdcafe1 | 3586 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3587 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3588 | { |
3589 | int rc = scrolling_window (w, header_line_row != NULL); | |
3590 | if (rc < 0) | |
3591 | { | |
3592 | /* All rows were found to be equal. */ | |
3593 | paused_p = 0; | |
3594 | goto set_cursor; | |
3595 | } | |
3596 | else if (rc > 0) | |
6b61353c KH |
3597 | { |
3598 | /* We've scrolled the display. */ | |
3599 | force_p = 1; | |
3600 | changed_p = 1; | |
3601 | } | |
5f5c8ee5 GM |
3602 | } |
3603 | ||
3604 | /* Update the rest of the lines. */ | |
0bc32927 | 3605 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3606 | /* scrolling_window resets the enabled_p flag of the rows it |
3607 | reuses from current_matrix. */ | |
b7412313 | 3608 | if (row->enabled_p) |
5f5c8ee5 GM |
3609 | { |
3610 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3611 | int i; | |
177c0ea7 | 3612 | |
153a073c | 3613 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3614 | detect_input_pending. If it's done too often, |
3615 | scrolling large windows with repeated scroll-up | |
3616 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3617 | #if PERIODIC_PREEMPTION_CHECKING |
3618 | if (!force_p) | |
3619 | { | |
d35af63c | 3620 | EMACS_TIME tm; |
d012c62b | 3621 | EMACS_GET_TIME (tm); |
d35af63c | 3622 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b KS |
3623 | { |
3624 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3625 | if (detect_input_pending_ignore_squeezables ()) |
3626 | break; | |
d012c62b KS |
3627 | } |
3628 | } | |
3629 | #else | |
e87b8809 | 3630 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3631 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3632 | #endif |
e876ff42 GM |
3633 | changed_p |= update_window_line (w, vpos, |
3634 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3635 | |
3636 | /* Mark all rows below the last visible one in the current | |
3637 | matrix as invalid. This is necessary because of | |
3638 | variable line heights. Consider the case of three | |
3639 | successive redisplays, where the first displays 5 | |
3640 | lines, the second 3 lines, and the third 5 lines again. | |
3641 | If the second redisplay wouldn't mark rows in the | |
3642 | current matrix invalid, the third redisplay might be | |
3643 | tempted to optimize redisplay based on lines displayed | |
3644 | in the first redisplay. */ | |
3645 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3646 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3647 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3648 | } | |
3649 | ||
3650 | /* Was display preempted? */ | |
3651 | paused_p = row < end; | |
177c0ea7 | 3652 | |
56974e03 | 3653 | set_cursor: |
177c0ea7 | 3654 | |
6b61353c KH |
3655 | /* Update the header line after scrolling because a new header |
3656 | line would otherwise overwrite lines at the top of the window | |
3657 | that can be scrolled. */ | |
3658 | if (header_line_row && header_line_row->enabled_p) | |
3659 | { | |
3660 | header_line_row->y = 0; | |
3661 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3662 | } |
3663 | ||
153a073c | 3664 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3665 | if (!paused_p && !w->pseudo_window_p) |
3666 | { | |
93e023fc | 3667 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3668 | if (changed_p && rif->fix_overlapping_area) |
3669 | { | |
3670 | redraw_overlapped_rows (w, yb); | |
3671 | redraw_overlapping_rows (w, yb); | |
3672 | } | |
93e023fc | 3673 | #endif |
177c0ea7 | 3674 | |
5f5c8ee5 GM |
3675 | /* Make cursor visible at cursor position of W. */ |
3676 | set_window_cursor_after_update (w); | |
3677 | ||
e876ff42 GM |
3678 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3679 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3680 | IF_DEBUG (check_matrix_invariants (w)); |
3681 | #endif | |
4588ec20 | 3682 | } |
5f5c8ee5 | 3683 | |
e509cfa6 | 3684 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3685 | /* Remember the redisplay method used to display the matrix. */ |
3686 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3687 | #endif | |
408f5064 | 3688 | |
6b61353c KH |
3689 | #ifdef HAVE_WINDOW_SYSTEM |
3690 | update_window_fringes (w, 0); | |
3691 | #endif | |
3692 | ||
56974e03 GM |
3693 | /* End the update of window W. Don't set the cursor if we |
3694 | paused updating the display because in this case, | |
3695 | set_window_cursor_after_update hasn't been called, and | |
3696 | output_cursor doesn't contain the cursor location. */ | |
3697 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3698 | } |
5f5c8ee5 GM |
3699 | else |
3700 | paused_p = 1; | |
3701 | ||
e509cfa6 | 3702 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3703 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3704 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3705 | #endif | |
177c0ea7 | 3706 | |
5f5c8ee5 | 3707 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3708 | |
5f5c8ee5 | 3709 | return paused_p; |
4588ec20 JB |
3710 | } |
3711 | ||
b64b3980 | 3712 | |
5f5c8ee5 GM |
3713 | /* Update the display of area AREA in window W, row number VPOS. |
3714 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3715 | ||
3716 | static void | |
971de7fb | 3717 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3718 | { |
5f5c8ee5 | 3719 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3720 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3721 | |
3722 | /* Let functions in xterm.c know what area subsequent X positions | |
3723 | will be relative to. */ | |
3724 | updated_area = area; | |
3725 | ||
3726 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3727 | of the area. I don't think that something more sophisticated is | |
3728 | necessary here, since marginal areas will not be the default. */ | |
3729 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3730 | if (desired_row->used[area]) | |
3731 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3732 | rif->clear_end_of_line (-1); | |
b64b3980 | 3733 | } |
23b0200c | 3734 | |
352f1545 | 3735 | |
408f5064 GM |
3736 | /* Update the display of the text area of row VPOS in window W. |
3737 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3738 | |
408f5064 | 3739 | static int |
971de7fb | 3740 | update_text_area (struct window *w, int vpos) |
23b0200c | 3741 | { |
5f5c8ee5 GM |
3742 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3743 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3744 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3745 | int changed_p = 0; |
5f5c8ee5 GM |
3746 | |
3747 | /* Let functions in xterm.c know what area subsequent X positions | |
3748 | will be relative to. */ | |
3749 | updated_area = TEXT_AREA; | |
177c0ea7 | 3750 | |
5f5c8ee5 GM |
3751 | /* If rows are at different X or Y, or rows have different height, |
3752 | or the current row is marked invalid, write the entire line. */ | |
3753 | if (!current_row->enabled_p | |
3754 | || desired_row->y != current_row->y | |
3755 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3756 | || desired_row->phys_ascent != current_row->phys_ascent |
3757 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3758 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3759 | || current_row->overlapped_p |
fee8b690 CY |
3760 | /* This next line is necessary for correctly redrawing |
3761 | mouse-face areas after scrolling and other operations. | |
3762 | However, it causes excessive flickering when mouse is moved | |
3763 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3764 | line doesn't seem to hurt anything. -- cyd. |
3765 | But it is still needed for the header line. -- kfs. */ | |
3766 | || (current_row->mouse_face_p | |
3767 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3768 | || current_row->x != desired_row->x) |
3769 | { | |
3770 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3771 | |
5f5c8ee5 GM |
3772 | if (desired_row->used[TEXT_AREA]) |
3773 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3774 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3775 | |
5f5c8ee5 GM |
3776 | /* Clear to end of window. */ |
3777 | rif->clear_end_of_line (-1); | |
408f5064 | 3778 | changed_p = 1; |
60f2f3f1 GM |
3779 | |
3780 | /* This erases the cursor. We do this here because | |
3781 | notice_overwritten_cursor cannot easily check this, which | |
3782 | might indicate that the whole functionality of | |
3783 | notice_overwritten_cursor would better be implemented here. | |
3784 | On the other hand, we need notice_overwritten_cursor as long | |
3785 | as mouse highlighting is done asynchronously outside of | |
3786 | redisplay. */ | |
3787 | if (vpos == w->phys_cursor.vpos) | |
3788 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3789 | } |
3790 | else | |
3791 | { | |
3792 | int stop, i, x; | |
3793 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3794 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3795 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3796 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3797 | int abort_skipping = 0; |
5f5c8ee5 | 3798 | |
78897758 YM |
3799 | /* If the desired row extends its face to the text area end, and |
3800 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3801 | make sure we write at least one glyph, so that the face |
3802 | extension actually takes place. */ | |
78897758 YM |
3803 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3804 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3805 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3806 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3807 | --desired_stop_pos; |
177c0ea7 | 3808 | |
5f5c8ee5 GM |
3809 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3810 | i = 0; | |
3811 | x = desired_row->x; | |
8399f8a0 GM |
3812 | |
3813 | /* Loop over glyphs that current and desired row may have | |
3814 | in common. */ | |
5f5c8ee5 | 3815 | while (i < stop) |
352f1545 | 3816 | { |
91d227d9 | 3817 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3818 | |
5f5c8ee5 | 3819 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3820 | don't have to be written. We can't skip if the last |
3821 | current glyph overlaps the glyph to its right. For | |
3822 | example, consider a current row of `if ' with the `f' in | |
3823 | Courier bold so that it overlaps the ` ' to its right. | |
3824 | If the desired row is ` ', we would skip over the space | |
3825 | after the `if' and there would remain a pixel from the | |
3826 | `f' on the screen. */ | |
3827 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3828 | { |
e47306e6 GM |
3829 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3830 | int left, right; | |
177c0ea7 | 3831 | |
e47306e6 GM |
3832 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3833 | &left, &right); | |
91d227d9 | 3834 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3835 | } |
177c0ea7 | 3836 | |
6d950f4c | 3837 | if (can_skip_p) |
352f1545 | 3838 | { |
91d227d9 CY |
3839 | int start_hpos = i; |
3840 | ||
6d950f4c GM |
3841 | while (i < stop |
3842 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3843 | { | |
3844 | x += desired_glyph->pixel_width; | |
3845 | ++desired_glyph, ++current_glyph, ++i; | |
3846 | } | |
3847 | ||
3848 | /* Consider the case that the current row contains "xxx | |
3849 | ppp ggg" in italic Courier font, and the desired row | |
3850 | is "xxx ggg". The character `p' has lbearing, `g' | |
3851 | has not. The loop above will stop in front of the | |
3852 | first `p' in the current row. If we would start | |
3853 | writing glyphs there, we wouldn't erase the lbearing | |
3854 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3855 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3856 | if (overlapping_glyphs_p |
3857 | && i > 0 | |
3858 | && i < current_row->used[TEXT_AREA] | |
3859 | && (current_row->used[TEXT_AREA] | |
3860 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3861 | { |
6d950f4c | 3862 | int left, right; |
177c0ea7 | 3863 | |
6d950f4c GM |
3864 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3865 | &left, &right); | |
3866 | while (left > 0 && i > 0) | |
3867 | { | |
3868 | --i, --desired_glyph, --current_glyph; | |
3869 | x -= desired_glyph->pixel_width; | |
3870 | left -= desired_glyph->pixel_width; | |
3871 | } | |
91d227d9 CY |
3872 | |
3873 | /* Abort the skipping algorithm if we end up before | |
3874 | our starting point, to avoid looping (bug#1070). | |
3875 | This can happen when the lbearing is larger than | |
3876 | the pixel width. */ | |
3877 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3878 | } |
352f1545 | 3879 | } |
177c0ea7 | 3880 | |
5f5c8ee5 GM |
3881 | /* Try to avoid writing the entire rest of the desired row |
3882 | by looking for a resync point. This mainly prevents | |
3883 | mode line flickering in the case the mode line is in | |
3884 | fixed-pitch font, which it usually will be. */ | |
3885 | if (i < desired_row->used[TEXT_AREA]) | |
3886 | { | |
3887 | int start_x = x, start_hpos = i; | |
3888 | struct glyph *start = desired_glyph; | |
3889 | int current_x = x; | |
6d950f4c GM |
3890 | int skip_first_p = !can_skip_p; |
3891 | ||
5f5c8ee5 GM |
3892 | /* Find the next glyph that's equal again. */ |
3893 | while (i < stop | |
6d950f4c GM |
3894 | && (skip_first_p |
3895 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3896 | && x == current_x) |
3897 | { | |
3898 | x += desired_glyph->pixel_width; | |
3899 | current_x += current_glyph->pixel_width; | |
3900 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3901 | skip_first_p = 0; |
5f5c8ee5 | 3902 | } |
23b0200c | 3903 | |
5f5c8ee5 GM |
3904 | if (i == start_hpos || x != current_x) |
3905 | { | |
3906 | i = start_hpos; | |
3907 | x = start_x; | |
3908 | desired_glyph = start; | |
3909 | break; | |
3910 | } | |
e47306e6 | 3911 | |
5f5c8ee5 GM |
3912 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3913 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3914 | changed_p = 1; |
5f5c8ee5 GM |
3915 | } |
3916 | } | |
177c0ea7 | 3917 | |
5f5c8ee5 GM |
3918 | /* Write the rest. */ |
3919 | if (i < desired_row->used[TEXT_AREA]) | |
3920 | { | |
3921 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3922 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3923 | changed_p = 1; |
5f5c8ee5 | 3924 | } |
177c0ea7 | 3925 | |
5f5c8ee5 GM |
3926 | /* Maybe clear to end of line. */ |
3927 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3928 | { | |
3929 | /* If new row extends to the end of the text area, nothing | |
3930 | has to be cleared, if and only if we did a write_glyphs | |
3931 | above. This is made sure by setting desired_stop_pos | |
3932 | appropriately above. */ | |
a54e2c05 | 3933 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3934 | || ((desired_row->used[TEXT_AREA] |
3935 | == current_row->used[TEXT_AREA]) | |
3936 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3937 | } |
3938 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3939 | { | |
3940 | /* If old row extends to the end of the text area, clear. */ | |
3941 | if (i >= desired_row->used[TEXT_AREA]) | |
3942 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3943 | desired_row->pixel_width); |
5f5c8ee5 | 3944 | rif->clear_end_of_line (-1); |
408f5064 | 3945 | changed_p = 1; |
5f5c8ee5 GM |
3946 | } |
3947 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3948 | { |
5f5c8ee5 GM |
3949 | /* Otherwise clear to the end of the old row. Everything |
3950 | after that position should be clear already. */ | |
27786b2f | 3951 | int xlim; |
177c0ea7 | 3952 | |
5f5c8ee5 GM |
3953 | if (i >= desired_row->used[TEXT_AREA]) |
3954 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3955 | desired_row->pixel_width); |
5f5c8ee5 GM |
3956 | |
3957 | /* If cursor is displayed at the end of the line, make sure | |
3958 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3959 | with which to erase the cursor (because this method | |
3960 | doesn't work with lbearing/rbearing), so we must do it | |
3961 | this way. */ | |
3962 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3963 | && (desired_row->reversed_p |
3964 | ? (w->phys_cursor.hpos < 0) | |
3965 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3966 | { |
3967 | w->phys_cursor_on_p = 0; | |
27786b2f | 3968 | xlim = -1; |
5f5c8ee5 GM |
3969 | } |
3970 | else | |
27786b2f PE |
3971 | xlim = current_row->pixel_width; |
3972 | rif->clear_end_of_line (xlim); | |
408f5064 | 3973 | changed_p = 1; |
2e8907d3 | 3974 | } |
23b0200c | 3975 | } |
408f5064 GM |
3976 | |
3977 | return changed_p; | |
23b0200c | 3978 | } |
4588ec20 | 3979 | |
5f5c8ee5 | 3980 | |
408f5064 GM |
3981 | /* Update row VPOS in window W. Value is non-zero if display has been |
3982 | changed. */ | |
5f5c8ee5 | 3983 | |
408f5064 | 3984 | static int |
971de7fb | 3985 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
3986 | { |
3987 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3988 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3989 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3990 | int changed_p = 0; |
5f5c8ee5 | 3991 | |
5f5c8ee5 GM |
3992 | /* Set the row being updated. This is important to let xterm.c |
3993 | know what line height values are in effect. */ | |
3994 | updated_row = desired_row; | |
3995 | ||
177c0ea7 JB |
3996 | /* A row can be completely invisible in case a desired matrix was |
3997 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3998 | the matrix. Make sure to make such rows current anyway, since |
3999 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4000 | if (desired_row->mode_line_p |
4001 | || desired_row->visible_height > 0) | |
408f5064 | 4002 | { |
a54e2c05 | 4003 | eassert (desired_row->enabled_p); |
504805ac GM |
4004 | |
4005 | /* Update display of the left margin area, if there is one. */ | |
4006 | if (!desired_row->full_width_p | |
7df02016 | 4007 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4008 | { |
4009 | changed_p = 1; | |
4010 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4011 | } | |
177c0ea7 | 4012 | |
504805ac GM |
4013 | /* Update the display of the text area. */ |
4014 | if (update_text_area (w, vpos)) | |
4015 | { | |
4016 | changed_p = 1; | |
4017 | if (current_row->mouse_face_p) | |
4018 | *mouse_face_overwritten_p = 1; | |
4019 | } | |
177c0ea7 | 4020 | |
504805ac GM |
4021 | /* Update display of the right margin area, if there is one. */ |
4022 | if (!desired_row->full_width_p | |
7df02016 | 4023 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4024 | { |
4025 | changed_p = 1; | |
4026 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4027 | } | |
177c0ea7 | 4028 | |
504805ac GM |
4029 | /* Draw truncation marks etc. */ |
4030 | if (!current_row->enabled_p | |
4031 | || desired_row->y != current_row->y | |
4032 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4033 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4034 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4035 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4036 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4037 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4038 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4039 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4040 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4041 | } |
177c0ea7 | 4042 | |
5f5c8ee5 GM |
4043 | /* Update current_row from desired_row. */ |
4044 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4045 | updated_row = NULL; | |
408f5064 | 4046 | return changed_p; |
5f5c8ee5 GM |
4047 | } |
4048 | ||
4049 | ||
4050 | /* Set the cursor after an update of window W. This function may only | |
4051 | be called from update_window. */ | |
4052 | ||
4053 | static void | |
971de7fb | 4054 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4055 | { |
5f5c8ee5 | 4056 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4057 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4058 | int cx, cy, vpos, hpos; |
4059 | ||
4060 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 4061 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 4062 | |
b96fd3e8 GM |
4063 | if (cursor_in_echo_area |
4064 | && !NILP (echo_area_buffer[0]) | |
4065 | /* If we are showing a message instead of the mini-buffer, | |
4066 | show the cursor for the message instead. */ | |
4067 | && XWINDOW (minibuf_window) == w | |
4068 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4069 | /* These cases apply only to the frame that contains |
4070 | the active mini-buffer window. */ | |
4071 | && FRAME_HAS_MINIBUF_P (f) | |
4072 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4073 | { | |
4074 | cx = cy = vpos = hpos = 0; | |
4075 | ||
4076 | if (cursor_in_echo_area >= 0) | |
4077 | { | |
4078 | /* If the mini-buffer is several lines high, find the last | |
4079 | line that has any text on it. Note: either all lines | |
4080 | are enabled or none. Otherwise we wouldn't be able to | |
4081 | determine Y. */ | |
862b4790 GM |
4082 | struct glyph_row *row, *last_row; |
4083 | struct glyph *glyph; | |
4084 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4085 | |
862b4790 | 4086 | last_row = NULL; |
6206f8ce GM |
4087 | row = w->current_matrix->rows; |
4088 | while (row->enabled_p | |
4089 | && (last_row == NULL | |
4090 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4091 | { |
862b4790 GM |
4092 | if (row->used[TEXT_AREA] |
4093 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4094 | last_row = row; | |
6206f8ce | 4095 | ++row; |
862b4790 | 4096 | } |
177c0ea7 | 4097 | |
5f5c8ee5 GM |
4098 | if (last_row) |
4099 | { | |
6206f8ce GM |
4100 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4101 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4102 | |
b96fd3e8 | 4103 | while (last > start && last->charpos < 0) |
862b4790 | 4104 | --last; |
177c0ea7 | 4105 | |
862b4790 GM |
4106 | for (glyph = start; glyph < last; ++glyph) |
4107 | { | |
4108 | cx += glyph->pixel_width; | |
4109 | ++hpos; | |
4110 | } | |
4111 | ||
5f5c8ee5 | 4112 | cy = last_row->y; |
862b4790 | 4113 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4114 | } |
4115 | } | |
4116 | } | |
4117 | else | |
4118 | { | |
4119 | cx = w->cursor.x; | |
4120 | cy = w->cursor.y; | |
4121 | hpos = w->cursor.hpos; | |
4122 | vpos = w->cursor.vpos; | |
4123 | } | |
4588ec20 | 4124 | |
5f5c8ee5 | 4125 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4126 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4127 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4128 | vpos = max (0, vpos); | |
4129 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4130 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4131 | } |
4588ec20 | 4132 | |
5f5c8ee5 | 4133 | |
6df5d75f GM |
4134 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4135 | tree rooted at W. */ | |
4136 | ||
4137 | void | |
971de7fb | 4138 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4139 | { |
4140 | while (w) | |
4141 | { | |
4142 | if (!NILP (w->hchild)) | |
4143 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4144 | else if (!NILP (w->vchild)) | |
4145 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4146 | else | |
4147 | w->must_be_updated_p = on_p; | |
4148 | ||
4149 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4150 | } | |
177c0ea7 | 4151 | } |
6df5d75f GM |
4152 | |
4153 | ||
4154 | \f | |
4155 | /*********************************************************************** | |
4156 | Window-Based Scrolling | |
4157 | ***********************************************************************/ | |
4158 | ||
4159 | /* Structure describing rows in scrolling_window. */ | |
4160 | ||
4161 | struct row_entry | |
4162 | { | |
4163 | /* Number of occurrences of this row in desired and current matrix. */ | |
4164 | int old_uses, new_uses; | |
177c0ea7 | 4165 | |
6df5d75f GM |
4166 | /* Vpos of row in new matrix. */ |
4167 | int new_line_number; | |
4168 | ||
4169 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4170 | ptrdiff_t bucket; |
177c0ea7 | 4171 | |
6df5d75f GM |
4172 | /* The row described by this entry. */ |
4173 | struct glyph_row *row; | |
177c0ea7 | 4174 | |
6df5d75f GM |
4175 | /* Hash collision chain. */ |
4176 | struct row_entry *next; | |
4177 | }; | |
4178 | ||
4179 | /* A pool to allocate row_entry structures from, and the size of the | |
4180 | pool. The pool is reallocated in scrolling_window when we find | |
4181 | that we need a larger one. */ | |
4182 | ||
4183 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4184 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4185 | |
4186 | /* Index of next free entry in row_entry_pool. */ | |
4187 | ||
ca9ce8f2 | 4188 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4189 | |
4190 | /* The hash table used during scrolling, and the table's size. This | |
4191 | table is used to quickly identify equal rows in the desired and | |
4192 | current matrix. */ | |
4193 | ||
4194 | static struct row_entry **row_table; | |
ca9ce8f2 | 4195 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4196 | |
4197 | /* Vectors of pointers to row_entry structures belonging to the | |
4198 | current and desired matrix, and the size of the vectors. */ | |
4199 | ||
4200 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4201 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4202 | |
4203 | /* A pool to allocate run structures from, and its size. */ | |
4204 | ||
4205 | static struct run *run_pool; | |
0065d054 | 4206 | static ptrdiff_t runs_size; |
6df5d75f GM |
4207 | |
4208 | /* A vector of runs of lines found during scrolling. */ | |
4209 | ||
4210 | static struct run **runs; | |
4211 | ||
6b1f9ba4 | 4212 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4213 | |
55d4c1b2 | 4214 | static inline struct row_entry * |
6b1f9ba4 | 4215 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4216 | { |
4217 | struct row_entry *entry; | |
ca9ce8f2 | 4218 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4219 | |
6df5d75f | 4220 | entry = row_table[i]; |
a54e2c05 | 4221 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4222 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4223 | entry = entry->next; |
177c0ea7 | 4224 | |
6df5d75f GM |
4225 | if (entry == NULL) |
4226 | { | |
4227 | entry = row_entry_pool + row_entry_idx++; | |
4228 | entry->row = row; | |
4229 | entry->old_uses = entry->new_uses = 0; | |
4230 | entry->new_line_number = 0; | |
4231 | entry->bucket = i; | |
4232 | entry->next = row_table[i]; | |
4233 | row_table[i] = entry; | |
4234 | } | |
4235 | ||
4236 | return entry; | |
4237 | } | |
4238 | ||
4239 | ||
5f5c8ee5 | 4240 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4241 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4242 | |
4243 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4244 | Technique for Isolating Differences Between Files." It should take | |
4245 | O(N) time. | |
4246 | ||
4247 | A short outline of the steps of the algorithm | |
4248 | ||
4249 | 1. Skip lines equal at the start and end of both matrices. | |
4250 | ||
4251 | 2. Enter rows in the current and desired matrix into a symbol | |
4252 | table, counting how often they appear in both matrices. | |
4253 | ||
4254 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4255 | i.e. we assume that such lines are likely to have been moved. | |
4256 | ||
4257 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4258 | forward and backward. | |
4259 | ||
4260 | Value is | |
4261 | ||
4262 | -1 if all rows were found to be equal. | |
4263 | 0 to indicate that we did not scroll the display, or | |
4264 | 1 if we did scroll. */ | |
4265 | ||
4266 | static int | |
971de7fb | 4267 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4268 | { |
5f5c8ee5 GM |
4269 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4270 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4271 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4272 | ptrdiff_t i; |
4273 | int j, first_old, first_new, last_old, last_new; | |
4274 | int nruns, run_idx; | |
0065d054 | 4275 | ptrdiff_t n; |
6df5d75f | 4276 | struct row_entry *entry; |
fa971ac3 | 4277 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4278 | |
4279 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4280 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4281 | { |
bfdcafe1 GM |
4282 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4283 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4284 | ||
4285 | if (c->enabled_p | |
4286 | && d->enabled_p | |
6b61353c | 4287 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4288 | && c->y == d->y |
4289 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4290 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4291 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4292 | { |
4293 | assign_row (c, d); | |
4294 | d->enabled_p = 0; | |
4295 | } | |
4296 | else | |
4297 | break; | |
5f5c8ee5 | 4298 | } |
4588ec20 | 4299 | |
5f5c8ee5 GM |
4300 | /* Give up if some rows in the desired matrix are not enabled. */ |
4301 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4302 | return -1; | |
177c0ea7 | 4303 | |
5f5c8ee5 GM |
4304 | first_old = first_new = i; |
4305 | ||
4d8ade89 YM |
4306 | /* Set last_new to the index + 1 of the row that reaches the |
4307 | bottom boundary in the desired matrix. Give up if we find a | |
4308 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4309 | i = first_new + 1; |
4d8ade89 YM |
4310 | while (i < desired_matrix->nrows - 1) |
4311 | { | |
4312 | int bottom; | |
5f5c8ee5 | 4313 | |
4d8ade89 YM |
4314 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4315 | return 0; | |
4316 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4317 | if (bottom <= yb) | |
4318 | ++i; | |
4319 | if (bottom >= yb) | |
4320 | break; | |
4321 | } | |
5f5c8ee5 GM |
4322 | |
4323 | last_new = i; | |
4324 | ||
4d8ade89 YM |
4325 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4326 | boundary in the current matrix. We don't look at the enabled | |
4327 | flag here because we plan to reuse part of the display even if | |
4328 | other parts are disabled. */ | |
5f5c8ee5 | 4329 | i = first_old + 1; |
93962bfa GM |
4330 | while (i < current_matrix->nrows - 1) |
4331 | { | |
4332 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4333 | if (bottom <= yb) | |
4334 | ++i; | |
4335 | if (bottom >= yb) | |
4336 | break; | |
4337 | } | |
4338 | ||
5f5c8ee5 GM |
4339 | last_old = i; |
4340 | ||
4341 | /* Skip over rows equal at the bottom. */ | |
4342 | i = last_new; | |
4343 | j = last_old; | |
4344 | while (i - 1 > first_new | |
4345 | && j - 1 > first_old | |
1e5b2111 EZ |
4346 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4347 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4348 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4349 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4350 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4351 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4352 | --i, --j; |
4353 | last_new = i; | |
4354 | last_old = j; | |
4355 | ||
4356 | /* Nothing to do if all rows are equal. */ | |
4357 | if (last_new == first_new) | |
4358 | return 0; | |
4359 | ||
0065d054 | 4360 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4361 | |
4362 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4363 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4364 | So, set next_almost_prime_increment_max to 10. | |
4365 | ||
4366 | It's just a coincidence that next_almost_prime_increment_max == | |
4367 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4368 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4369 | because next_almost_prime (113) would be 127. */ | |
4370 | { | |
4371 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4372 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4373 | ptrdiff_t row_table_max = |
0065d054 PE |
4374 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4375 | - next_almost_prime_increment_max); | |
4376 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4377 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4378 | memory_full (SIZE_MAX); |
4379 | } | |
4380 | ||
6df5d75f | 4381 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4382 | |
6df5d75f | 4383 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4384 | old_lines = xpalloc (old_lines, &old_lines_size, |
4385 | current_matrix->nrows - old_lines_size, | |
4386 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4387 | |
6df5d75f | 4388 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4389 | new_lines = xpalloc (new_lines, &new_lines_size, |
4390 | desired_matrix->nrows - new_lines_size, | |
4391 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4392 | |
ca9ce8f2 PE |
4393 | n = desired_matrix->nrows; |
4394 | n += current_matrix->nrows; | |
0065d054 | 4395 | if (row_table_size < 3 * n) |
6df5d75f | 4396 | { |
ca9ce8f2 | 4397 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4398 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4399 | row_table_size = size; |
0065d054 | 4400 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4401 | } |
4402 | ||
4403 | if (n > row_entry_pool_size) | |
0065d054 PE |
4404 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4405 | n - row_entry_pool_size, | |
4406 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4407 | |
4408 | if (desired_matrix->nrows > runs_size) | |
4409 | { | |
0065d054 PE |
4410 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4411 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4412 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4413 | } |
4414 | ||
4415 | nruns = run_idx = 0; | |
4416 | row_entry_idx = 0; | |
4417 | ||
4418 | /* Add rows from the current and desired matrix to the hash table | |
4419 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4420 | |
5f5c8ee5 GM |
4421 | for (i = first_old; i < last_old; ++i) |
4422 | { | |
4423 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4424 | { | |
6b1f9ba4 | 4425 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4426 | old_lines[i] = entry; |
4427 | ++entry->old_uses; | |
5f5c8ee5 GM |
4428 | } |
4429 | else | |
6df5d75f | 4430 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4431 | } |
4432 | ||
5f5c8ee5 GM |
4433 | for (i = first_new; i < last_new; ++i) |
4434 | { | |
a54e2c05 | 4435 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4436 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4437 | ++entry->new_uses; |
4438 | entry->new_line_number = i; | |
4439 | new_lines[i] = entry; | |
5f5c8ee5 | 4440 | } |
4588ec20 | 4441 | |
5f5c8ee5 GM |
4442 | /* Identify moves based on lines that are unique and equal |
4443 | in both matrices. */ | |
4444 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4445 | if (old_lines[i] |
4446 | && old_lines[i]->old_uses == 1 | |
4447 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4448 | { |
27786b2f | 4449 | int p, q; |
6df5d75f GM |
4450 | int new_line = old_lines[i]->new_line_number; |
4451 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4452 | |
4453 | /* Record move. */ | |
4454 | run->current_vpos = i; | |
4455 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4456 | run->desired_vpos = new_line; | |
4457 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4458 | run->nrows = 1; | |
4459 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4460 | ||
4461 | /* Extend backward. */ | |
27786b2f PE |
4462 | p = i - 1; |
4463 | q = new_line - 1; | |
4464 | while (p > first_old | |
4465 | && q > first_new | |
4466 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4467 | { |
27786b2f | 4468 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4469 | --run->current_vpos; |
4470 | --run->desired_vpos; | |
5f5c8ee5 GM |
4471 | ++run->nrows; |
4472 | run->height += h; | |
4473 | run->desired_y -= h; | |
4474 | run->current_y -= h; | |
27786b2f | 4475 | --p, --q; |
5f5c8ee5 | 4476 | } |
4588ec20 | 4477 | |
5f5c8ee5 | 4478 | /* Extend forward. */ |
27786b2f PE |
4479 | p = i + 1; |
4480 | q = new_line + 1; | |
4481 | while (p < last_old | |
4482 | && q < last_new | |
4483 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4484 | { |
27786b2f | 4485 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4486 | ++run->nrows; |
5f5c8ee5 | 4487 | run->height += h; |
27786b2f | 4488 | ++p, ++q; |
5f5c8ee5 | 4489 | } |
19dff8dc | 4490 | |
5f5c8ee5 GM |
4491 | /* Insert run into list of all runs. Order runs by copied |
4492 | pixel lines. Note that we record runs that don't have to | |
4493 | be copied because they are already in place. This is done | |
4494 | because we can avoid calling update_window_line in this | |
4495 | case. */ | |
27786b2f | 4496 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4497 | ; |
27786b2f PE |
4498 | for (q = nruns; q > p; --q) |
4499 | runs[q] = runs[q - 1]; | |
4500 | runs[p] = run; | |
5f5c8ee5 GM |
4501 | ++nruns; |
4502 | ||
4503 | i += run->nrows; | |
4504 | } | |
4505 | else | |
4506 | ++i; | |
4588ec20 | 4507 | |
5f5c8ee5 GM |
4508 | /* Do the moves. Do it in a way that we don't overwrite something |
4509 | we want to copy later on. This is not solvable in general | |
4510 | because there is only one display and we don't have a way to | |
4511 | exchange areas on this display. Example: | |
4588ec20 | 4512 | |
5f5c8ee5 GM |
4513 | +-----------+ +-----------+ |
4514 | | A | | B | | |
4515 | +-----------+ --> +-----------+ | |
4516 | | B | | A | | |
4517 | +-----------+ +-----------+ | |
4588ec20 | 4518 | |
5f5c8ee5 GM |
4519 | Instead, prefer bigger moves, and invalidate moves that would |
4520 | copy from where we copied to. */ | |
ea0d86af | 4521 | |
5f5c8ee5 GM |
4522 | for (i = 0; i < nruns; ++i) |
4523 | if (runs[i]->nrows > 0) | |
4524 | { | |
4525 | struct run *r = runs[i]; | |
24e86043 | 4526 | |
5f5c8ee5 GM |
4527 | /* Copy on the display. */ |
4528 | if (r->current_y != r->desired_y) | |
4529 | { | |
989b42d2 | 4530 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4531 | rif->scroll_run_hook (w, r); |
1305621b | 4532 | } |
5f5c8ee5 | 4533 | |
1305621b YM |
4534 | /* Truncate runs that copy to where we copied to, and |
4535 | invalidate runs that copy from where we copied to. */ | |
4536 | for (j = nruns - 1; j > i; --j) | |
4537 | { | |
4538 | struct run *p = runs[j]; | |
4539 | int truncated_p = 0; | |
5f5c8ee5 | 4540 | |
1305621b YM |
4541 | if (p->nrows > 0 |
4542 | && p->desired_y < r->desired_y + r->height | |
4543 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4544 | { |
1305621b YM |
4545 | if (p->desired_y < r->desired_y) |
4546 | { | |
4547 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4548 | p->height = r->desired_y - p->desired_y; | |
4549 | truncated_p = 1; | |
4550 | } | |
4551 | else | |
4552 | { | |
4553 | int nrows_copied = (r->desired_vpos + r->nrows | |
4554 | - p->desired_vpos); | |
4555 | ||
4556 | if (p->nrows <= nrows_copied) | |
4557 | p->nrows = 0; | |
4558 | else | |
4559 | { | |
4560 | int height_copied = (r->desired_y + r->height | |
4561 | - p->desired_y); | |
4562 | ||
4563 | p->current_vpos += nrows_copied; | |
4564 | p->desired_vpos += nrows_copied; | |
4565 | p->nrows -= nrows_copied; | |
4566 | p->current_y += height_copied; | |
4567 | p->desired_y += height_copied; | |
4568 | p->height -= height_copied; | |
4569 | truncated_p = 1; | |
4570 | } | |
4571 | } | |
4572 | } | |
177c0ea7 | 4573 | |
1305621b YM |
4574 | if (r->current_y != r->desired_y |
4575 | /* The condition below is equivalent to | |
4576 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4577 | && p->current_y < r->desired_y + r->height) |
1305621b | 4578 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4579 | && (p->current_y + p->height |
1305621b YM |
4580 | <= r->desired_y + r->height))) |
4581 | because we have 0 < p->height <= r->height. */ | |
4582 | && p->current_y < r->desired_y + r->height | |
4583 | && p->current_y + p->height > r->desired_y) | |
4584 | p->nrows = 0; | |
4585 | ||
4586 | /* Reorder runs by copied pixel lines if truncated. */ | |
4587 | if (truncated_p && p->nrows > 0) | |
4588 | { | |
4589 | int k = nruns - 1; | |
4590 | ||
4591 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4592 | k--; | |
4593 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4594 | runs[k] = p; | |
5f5c8ee5 GM |
4595 | } |
4596 | } | |
ea0d86af | 4597 | |
5f5c8ee5 GM |
4598 | /* Assign matrix rows. */ |
4599 | for (j = 0; j < r->nrows; ++j) | |
4600 | { | |
4601 | struct glyph_row *from, *to; | |
408f5064 | 4602 | int to_overlapped_p; |
e876ff42 | 4603 | |
5f5c8ee5 GM |
4604 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4605 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4606 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4607 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4608 | assign_row (to, from); |
1305621b YM |
4609 | /* The above `assign_row' actually does swap, so if we had |
4610 | an overlap in the copy destination of two runs, then | |
4611 | the second run would assign a previously disabled bogus | |
4612 | row. But thanks to the truncation code in the | |
4613 | preceding for-loop, we no longer have such an overlap, | |
4614 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4615 | eassert (to->enabled_p); |
1305621b | 4616 | from->enabled_p = 0; |
408f5064 | 4617 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4618 | } |
4619 | } | |
15874c59 | 4620 | |
6df5d75f GM |
4621 | /* Clear the hash table, for the next time. */ |
4622 | for (i = 0; i < row_entry_idx; ++i) | |
4623 | row_table[row_entry_pool[i].bucket] = NULL; | |
4624 | ||
aec1708a PE |
4625 | /* Value is 1 to indicate that we scrolled the display. */ |
4626 | return 0 < nruns; | |
5f5c8ee5 | 4627 | } |
de83c314 | 4628 | |
15874c59 | 4629 | |
4588ec20 | 4630 | \f |
5f5c8ee5 GM |
4631 | /************************************************************************ |
4632 | Frame-Based Updates | |
4633 | ************************************************************************/ | |
4588ec20 | 4634 | |
5f5c8ee5 | 4635 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4636 | |
5f5c8ee5 GM |
4637 | FORCE_P non-zero means that the update should not be stopped by |
4638 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4639 | should not be tried. | |
4640 | ||
4641 | Value is non-zero if update was stopped due to pending input. */ | |
4642 | ||
4643 | static int | |
971de7fb | 4644 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4645 | { |
5f5c8ee5 GM |
4646 | /* Frame matrices to work on. */ |
4647 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4648 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4649 | int i; | |
27786b2f | 4650 | int pause_p; |
4588ec20 | 4651 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4652 | |
a54e2c05 | 4653 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4654 | |
c37e4889 RS |
4655 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4656 | calculate_costs (f); | |
4657 | ||
d88c2b9e RS |
4658 | if (preempt_count <= 0) |
4659 | preempt_count = 1; | |
4660 | ||
a2130dbb KS |
4661 | #if !PERIODIC_PREEMPTION_CHECKING |
4662 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4663 | { |
27786b2f | 4664 | pause_p = 1; |
4588ec20 JB |
4665 | goto do_pause; |
4666 | } | |
d012c62b | 4667 | #endif |
4588ec20 | 4668 | |
5f5c8ee5 | 4669 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4670 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4671 | inhibit_id_p = 1; |
7098a0fa | 4672 | |
efb859b4 | 4673 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4674 | i/d line if just want cursor motion. */ |
4675 | for (i = 0; i < desired_matrix->nrows; i++) | |
4676 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4677 | break; |
4678 | ||
4679 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4680 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4681 | force_p |= scrolling (f); | |
4588ec20 JB |
4682 | |
4683 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4684 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4685 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4686 | |
5f5c8ee5 GM |
4687 | /* Now update the rest of the lines. */ |
4688 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4689 | { |
5f5c8ee5 | 4690 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4691 | { |
b6a65ac2 | 4692 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4693 | { |
4694 | /* Flush out every so many lines. | |
4695 | Also flush out if likely to have more than 1k buffered | |
4696 | otherwise. I'm told that some telnet connections get | |
4697 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4698 | FILE *display_output = FRAME_TTY (f)->output; |
4699 | if (display_output) | |
4588ec20 | 4700 | { |
fced92f1 CY |
4701 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4702 | if (outq > 900 | |
4703 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4704 | { |
fced92f1 CY |
4705 | fflush (display_output); |
4706 | if (preempt_count == 1) | |
4707 | { | |
a41f8bed | 4708 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4709 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4710 | /* Probably not a tty. Ignore the error and reset | |
4711 | the outq count. */ | |
4712 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4713 | #endif |
fced92f1 CY |
4714 | outq *= 10; |
4715 | if (baud_rate <= outq && baud_rate > 0) | |
4716 | sleep (outq / baud_rate); | |
4717 | } | |
4588ec20 JB |
4718 | } |
4719 | } | |
4588ec20 JB |
4720 | } |
4721 | ||
d012c62b KS |
4722 | #if PERIODIC_PREEMPTION_CHECKING |
4723 | if (!force_p) | |
4724 | { | |
d35af63c | 4725 | EMACS_TIME tm; |
d012c62b | 4726 | EMACS_GET_TIME (tm); |
d35af63c | 4727 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b KS |
4728 | { |
4729 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4730 | if (detect_input_pending_ignore_squeezables ()) |
4731 | break; | |
d012c62b KS |
4732 | } |
4733 | } | |
4734 | #else | |
4735 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4736 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4737 | #endif |
a2960116 | 4738 | |
5f5c8ee5 | 4739 | update_frame_line (f, i); |
4588ec20 | 4740 | } |
4588ec20 | 4741 | } |
177c0ea7 | 4742 | |
27786b2f | 4743 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4744 | |
4745 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4746 | if (!pause_p) |
4588ec20 | 4747 | { |
48cf7030 | 4748 | if ((cursor_in_echo_area |
5f5c8ee5 | 4749 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4750 | show the cursor for the message instead of for the |
5f5c8ee5 | 4751 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4752 | || (EQ (minibuf_window, selected_window) |
4753 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4754 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4755 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4756 | the active mini-buffer window. */ |
2577053b | 4757 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4758 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4759 | { |
7df02016 | 4760 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4761 | int row, col; |
4762 | ||
4763 | if (cursor_in_echo_area < 0) | |
4764 | { | |
5f5c8ee5 GM |
4765 | /* Negative value of cursor_in_echo_area means put |
4766 | cursor at beginning of line. */ | |
648fa17d JB |
4767 | row = top; |
4768 | col = 0; | |
4769 | } | |
1113d9db | 4770 | else |
648fa17d | 4771 | { |
5f5c8ee5 GM |
4772 | /* Positive value of cursor_in_echo_area means put |
4773 | cursor at the end of the prompt. If the mini-buffer | |
4774 | is several lines high, find the last line that has | |
4775 | any text on it. */ | |
7df02016 | 4776 | row = FRAME_LINES (f); |
177c0ea7 | 4777 | do |
648fa17d | 4778 | { |
5f5c8ee5 GM |
4779 | --row; |
4780 | col = 0; | |
177c0ea7 | 4781 | |
5f5c8ee5 GM |
4782 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4783 | { | |
4784 | /* Frame rows are filled up with spaces that | |
4785 | must be ignored here. */ | |
5f5c8ee5 GM |
4786 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4787 | row); | |
4788 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4789 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4790 | ||
4791 | while (last > start | |
4792 | && (last - 1)->charpos < 0) | |
4793 | --last; | |
177c0ea7 | 4794 | |
5f5c8ee5 GM |
4795 | col = last - start; |
4796 | } | |
648fa17d JB |
4797 | } |
4798 | while (row > top && col == 0); | |
4799 | ||
6395da5c | 4800 | /* Make sure COL is not out of range. */ |
868e640e | 4801 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4802 | { |
6395da5c | 4803 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4804 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4805 | { |
7df02016 | 4806 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4807 | row++; |
4808 | } | |
4809 | /* Otherwise move it back in range. */ | |
4810 | else | |
868e640e | 4811 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4812 | } |
4813 | } | |
4814 | ||
385ed61f | 4815 | cursor_to (f, row, col); |
1113d9db | 4816 | } |
4588ec20 | 4817 | else |
5f5c8ee5 GM |
4818 | { |
4819 | /* We have only one cursor on terminal frames. Use it to | |
4820 | display the cursor of the selected window. */ | |
4821 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4822 | if (w->cursor.vpos >= 0 |
4823 | /* The cursor vpos may be temporarily out of bounds | |
4824 | in the following situation: There is one window, | |
4825 | with the cursor in the lower half of it. The window | |
4826 | is split, and a message causes a redisplay before | |
4827 | a new cursor position has been computed. */ | |
7df02016 | 4828 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4829 | { |
4830 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4831 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4832 | ||
7df02016 KS |
4833 | if (INTEGERP (w->left_margin_cols)) |
4834 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4835 | |
7df02016 | 4836 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4837 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4838 | } |
4839 | } | |
4588ec20 JB |
4840 | } |
4841 | ||
ef1b0ba7 | 4842 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4843 | do_pause: |
ef1b0ba7 | 4844 | #endif |
4588ec20 | 4845 | |
5f5c8ee5 | 4846 | clear_desired_matrices (f); |
27786b2f | 4847 | return pause_p; |
4588ec20 JB |
4848 | } |
4849 | ||
4588ec20 | 4850 | |
5f5c8ee5 | 4851 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4852 | |
5bf46f05 | 4853 | static int |
971de7fb | 4854 | scrolling (struct frame *frame) |
4588ec20 JB |
4855 | { |
4856 | int unchanged_at_top, unchanged_at_bottom; | |
4857 | int window_size; | |
4858 | int changed_lines; | |
7df02016 KS |
4859 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4860 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4861 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4862 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4863 | register int i; |
7df02016 | 4864 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4865 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4866 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4867 | |
5f5c8ee5 GM |
4868 | if (!current_matrix) |
4869 | abort (); | |
4588ec20 | 4870 | |
5f5c8ee5 GM |
4871 | /* Compute hash codes of all the lines. Also calculate number of |
4872 | changed lines, number of unchanged lines at the beginning, and | |
4873 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4874 | changed_lines = 0; |
4875 | unchanged_at_top = 0; | |
7df02016 KS |
4876 | unchanged_at_bottom = FRAME_LINES (frame); |
4877 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4878 | { |
4879 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4880 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4881 | return 0; |
5f5c8ee5 GM |
4882 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4883 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4884 | { |
4885 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4886 | new_hash[i] = old_hash[i]; | |
4887 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4888 | draw_cost[i] = INFINITY; | |
4889 | } | |
4588ec20 | 4890 | else |
f188b3c4 | 4891 | { |
5f5c8ee5 GM |
4892 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4893 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4894 | } |
4588ec20 JB |
4895 | |
4896 | if (old_hash[i] != new_hash[i]) | |
4897 | { | |
4898 | changed_lines++; | |
7df02016 | 4899 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4900 | } |
4901 | else if (i == unchanged_at_top) | |
4902 | unchanged_at_top++; | |
5f5c8ee5 | 4903 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4904 | } |
4905 | ||
4906 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4907 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4908 | && changed_lines < baud_rate / 2400) |
7df02016 | 4909 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4910 | return 1; |
4911 | ||
7df02016 | 4912 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4913 | - unchanged_at_bottom); |
4914 | ||
daf01701 | 4915 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4916 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4917 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4918 | free_at_end_vpos = -1; |
4919 | ||
4920 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4921 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4922 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4923 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4924 | && (window_size >= |
4925 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4926 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4927 | old_hash, new_hash, draw_cost))) |
4928 | return 0; | |
4929 | ||
5f5c8ee5 GM |
4930 | if (window_size < 2) |
4931 | return 0; | |
4932 | ||
502b9b64 | 4933 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4934 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4935 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4936 | old_hash + unchanged_at_top - 1, |
4937 | new_hash + unchanged_at_top - 1, | |
4938 | free_at_end_vpos - unchanged_at_top); | |
4939 | ||
4940 | return 0; | |
4941 | } | |
4588ec20 | 4942 | |
4588ec20 | 4943 | |
5f5c8ee5 GM |
4944 | /* Count the number of blanks at the start of the vector of glyphs R |
4945 | which is LEN glyphs long. */ | |
4588ec20 | 4946 | |
4588ec20 | 4947 | static int |
971de7fb | 4948 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4949 | { |
5f5c8ee5 | 4950 | int i; |
177c0ea7 | 4951 | |
5f5c8ee5 GM |
4952 | for (i = 0; i < len; ++i) |
4953 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4954 | break; | |
4955 | ||
4956 | return i; | |
4588ec20 JB |
4957 | } |
4958 | ||
5f5c8ee5 GM |
4959 | |
4960 | /* Count the number of glyphs in common at the start of the glyph | |
4961 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4962 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4963 | ||
4588ec20 | 4964 | static int |
971de7fb | 4965 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4966 | { |
5f5c8ee5 GM |
4967 | struct glyph *p1 = str1; |
4968 | struct glyph *p2 = str2; | |
177c0ea7 | 4969 | |
5f5c8ee5 GM |
4970 | while (p1 < end1 |
4971 | && p2 < end2 | |
42186983 | 4972 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4973 | ++p1, ++p2; |
177c0ea7 | 4974 | |
5f5c8ee5 | 4975 | return p1 - str1; |
4588ec20 JB |
4976 | } |
4977 | ||
5f5c8ee5 | 4978 | |
4588ec20 | 4979 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4980 | |
5e617bc2 | 4981 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4982 | |
5f5c8ee5 GM |
4983 | |
4984 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4985 | ||
4588ec20 | 4986 | static void |
971de7fb | 4987 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4988 | { |
5f5c8ee5 | 4989 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4990 | int tem; |
4991 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4992 | struct glyph_matrix *current_matrix = f->current_matrix; |
4993 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4994 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4995 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4996 | int must_write_whole_line_p; | |
daf01701 | 4997 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4998 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4999 | != FACE_TTY_DEFAULT_BG_COLOR); |
5000 | ||
5001 | if (colored_spaces_p) | |
5002 | write_spaces_p = 1; | |
5f5c8ee5 | 5003 | |
26c63686 GM |
5004 | /* Current row not enabled means it has unknown contents. We must |
5005 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5006 | must_write_whole_line_p = !current_row->enabled_p; |
5007 | if (must_write_whole_line_p) | |
4588ec20 | 5008 | { |
5f5c8ee5 | 5009 | obody = 0; |
4588ec20 JB |
5010 | olen = 0; |
5011 | } | |
5012 | else | |
5013 | { | |
5f5c8ee5 GM |
5014 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5015 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5016 | |
4cecaab8 MB |
5017 | /* Ignore trailing spaces, if we can. */ |
5018 | if (!write_spaces_p) | |
5019 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5020 | olen--; | |
4588ec20 JB |
5021 | } |
5022 | ||
5f5c8ee5 GM |
5023 | current_row->enabled_p = 1; |
5024 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5025 | |
5f5c8ee5 GM |
5026 | /* If desired line is empty, just clear the line. */ |
5027 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5028 | { |
5029 | nlen = 0; | |
5030 | goto just_erase; | |
5031 | } | |
5032 | ||
5f5c8ee5 GM |
5033 | nbody = desired_row->glyphs[TEXT_AREA]; |
5034 | nlen = desired_row->used[TEXT_AREA]; | |
5035 | nend = nbody + nlen; | |
5036 | ||
5037 | /* If display line has unknown contents, write the whole line. */ | |
5038 | if (must_write_whole_line_p) | |
5039 | { | |
26c63686 | 5040 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5041 | if (!write_spaces_p) |
74ca462f GM |
5042 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5043 | --nlen; | |
5044 | ||
26c63686 | 5045 | /* Write the contents of the desired line. */ |
74ca462f | 5046 | if (nlen) |
26c63686 | 5047 | { |
385ed61f KL |
5048 | cursor_to (f, vpos, 0); |
5049 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5050 | } |
177c0ea7 | 5051 | |
26c63686 GM |
5052 | /* Don't call clear_end_of_line if we already wrote the whole |
5053 | line. The cursor will not be at the right margin in that | |
5054 | case but in the line below. */ | |
7df02016 | 5055 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5056 | { |
385ed61f KL |
5057 | cursor_to (f, vpos, nlen); |
5058 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5059 | } |
58827478 GM |
5060 | else |
5061 | /* Make sure we are in the right row, otherwise cursor movement | |
5062 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5063 | cursor_to (f, vpos, 0); |
177c0ea7 | 5064 | |
5f5c8ee5 GM |
5065 | make_current (desired_matrix, current_matrix, vpos); |
5066 | return; | |
5067 | } | |
4588ec20 JB |
5068 | |
5069 | /* Pretend trailing spaces are not there at all, | |
5070 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5071 | if (!write_spaces_p) |
5072 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5073 | nlen--; | |
4588ec20 JB |
5074 | |
5075 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5076 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5077 | { |
5f5c8ee5 | 5078 | int i, j; |
4588ec20 | 5079 | |
5f5c8ee5 GM |
5080 | /* Find the first glyph in desired row that doesn't agree with |
5081 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5082 | for (i = 0; i < nlen; i++) |
5083 | { | |
5f5c8ee5 | 5084 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5085 | { |
5f5c8ee5 GM |
5086 | /* Find the end of the run of different glyphs. */ |
5087 | j = i + 1; | |
5088 | while (j < nlen | |
5089 | && (j >= olen | |
5090 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5091 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5092 | ++j; | |
177c0ea7 JB |
5093 | |
5094 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5095 | cursor_to (f, vpos, i); |
5096 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5097 | i = j - 1; |
4588ec20 JB |
5098 | |
5099 | /* Now find the next non-match. */ | |
5100 | } | |
5101 | } | |
5102 | ||
5103 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5104 | if (olen > nlen) | |
5105 | { | |
385ed61f KL |
5106 | cursor_to (f, vpos, nlen); |
5107 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5108 | } |
5109 | ||
5f5c8ee5 GM |
5110 | /* Make current row = desired row. */ |
5111 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5112 | return; |
5113 | } | |
5114 | ||
5f5c8ee5 GM |
5115 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5116 | characters in a row. */ | |
5117 | ||
4588ec20 JB |
5118 | if (!olen) |
5119 | { | |
5f5c8ee5 GM |
5120 | /* If current line is blank, skip over initial spaces, if |
5121 | possible, and write the rest. */ | |
4cecaab8 | 5122 | if (write_spaces_p) |
5f5c8ee5 GM |
5123 | nsp = 0; |
5124 | else | |
5125 | nsp = count_blanks (nbody, nlen); | |
5126 | ||
4588ec20 JB |
5127 | if (nlen > nsp) |
5128 | { | |
385ed61f KL |
5129 | cursor_to (f, vpos, nsp); |
5130 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5131 | } |
5132 | ||
502b9b64 | 5133 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5134 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5135 | return; |
5136 | } | |
5137 | ||
4588ec20 | 5138 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5139 | osp = count_blanks (obody, olen); |
4cecaab8 | 5140 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5141 | |
5f5c8ee5 GM |
5142 | /* Compute number of matching chars starting with first non-blank. */ |
5143 | begmatch = count_match (obody + osp, obody + olen, | |
5144 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5145 | |
5146 | /* Spaces in new match implicit space past the end of old. */ | |
5147 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5148 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5149 | { |
5150 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5151 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5152 | ++begmatch; | |
4588ec20 JB |
5153 | } |
5154 | ||
5155 | /* Avoid doing insert/delete char | |
5156 | just cause number of leading spaces differs | |
5f5c8ee5 | 5157 | when the following text does not match. */ |
4588ec20 JB |
5158 | if (begmatch == 0 && osp != nsp) |
5159 | osp = nsp = min (osp, nsp); | |
5160 | ||
5161 | /* Find matching characters at end of line */ | |
5162 | op1 = obody + olen; | |
5163 | np1 = nbody + nlen; | |
5164 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5165 | while (op1 > op2 |
5166 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5167 | { |
5168 | op1--; | |
5169 | np1--; | |
5170 | } | |
5171 | endmatch = obody + olen - op1; | |
5172 | ||
4588ec20 JB |
5173 | /* tem gets the distance to insert or delete. |
5174 | endmatch is how many characters we save by doing so. | |
5175 | Is it worth it? */ | |
5176 | ||
5177 | tem = (nlen - nsp) - (olen - osp); | |
5178 | if (endmatch && tem | |
daf01701 | 5179 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5180 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5181 | endmatch = 0; |
5182 | ||
5183 | /* nsp - osp is the distance to insert or delete. | |
5184 | If that is nonzero, begmatch is known to be nonzero also. | |
5185 | begmatch + endmatch is how much we save by doing the ins/del. | |
5186 | Is it worth it? */ | |
5187 | ||
5188 | if (nsp != osp | |
daf01701 | 5189 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5190 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5191 | { |
5192 | begmatch = 0; | |
5193 | endmatch = 0; | |
5194 | osp = nsp = min (osp, nsp); | |
5195 | } | |
5196 | ||
5197 | /* Now go through the line, inserting, writing and | |
5198 | deleting as appropriate. */ | |
5199 | ||
5200 | if (osp > nsp) | |
5201 | { | |
385ed61f KL |
5202 | cursor_to (f, vpos, nsp); |
5203 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5204 | } |
5205 | else if (nsp > osp) | |
5206 | { | |
5207 | /* If going to delete chars later in line | |
5208 | and insert earlier in the line, | |
5209 | must delete first to avoid losing data in the insert */ | |
5210 | if (endmatch && nlen < olen + nsp - osp) | |
5211 | { | |
385ed61f KL |
5212 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5213 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5214 | olen = nlen - (nsp - osp); |
5215 | } | |
385ed61f KL |
5216 | cursor_to (f, vpos, osp); |
5217 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5218 | } |
5219 | olen += nsp - osp; | |
5220 | ||
5221 | tem = nsp + begmatch + endmatch; | |
5222 | if (nlen != tem || olen != tem) | |
5223 | { | |
4588ec20 JB |
5224 | if (!endmatch || nlen == olen) |
5225 | { | |
c363a1d6 GM |
5226 | /* If new text being written reaches right margin, there is |
5227 | no need to do clear-to-eol at the end of this function | |
5228 | (and it would not be safe, since cursor is not going to | |
5229 | be "at the margin" after the text is done). */ | |
7df02016 | 5230 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5231 | olen = 0; |
c363a1d6 GM |
5232 | |
5233 | /* Function write_glyphs is prepared to do nothing | |
5234 | if passed a length <= 0. Check it here to avoid | |
5235 | unnecessary cursor movement. */ | |
5236 | if (nlen - tem > 0) | |
5237 | { | |
385ed61f KL |
5238 | cursor_to (f, vpos, nsp + begmatch); |
5239 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5240 | } |
4588ec20 JB |
5241 | } |
5242 | else if (nlen > olen) | |
5243 | { | |
24e86043 KH |
5244 | /* Here, we used to have the following simple code: |
5245 | ---------------------------------------- | |
5246 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5247 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5248 | ---------------------------------------- | |
5249 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5250 | is a padding glyph. */ | |
5251 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5252 | int del; | |
5f5c8ee5 | 5253 | |
385ed61f | 5254 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5255 | |
5f5c8ee5 | 5256 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5257 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5258 | out--; | |
385ed61f | 5259 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5260 | |
5f5c8ee5 GM |
5261 | /* If we left columns to be overwritten, we must delete them. */ |
5262 | del = olen - tem - out; | |
c363a1d6 | 5263 | if (del > 0) |
385ed61f | 5264 | delete_glyphs (f, del); |
177c0ea7 | 5265 | |
5f5c8ee5 | 5266 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5267 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5268 | olen = nlen; |
5269 | } | |
5270 | else if (olen > nlen) | |
5271 | { | |
385ed61f KL |
5272 | cursor_to (f, vpos, nsp + begmatch); |
5273 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5274 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5275 | olen = nlen; |
5276 | } | |
bd9e3e75 | 5277 | } |
5f5c8ee5 GM |
5278 | |
5279 | just_erase: | |
5280 | /* If any unerased characters remain after the new line, erase them. */ | |
5281 | if (olen > nlen) | |
078b3696 | 5282 | { |
385ed61f KL |
5283 | cursor_to (f, vpos, nlen); |
5284 | clear_end_of_line (f, olen); | |
078b3696 | 5285 | } |
5f5c8ee5 GM |
5286 | |
5287 | /* Exchange contents between current_frame and new_frame. */ | |
5288 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5289 | } |
5f5c8ee5 GM |
5290 | |
5291 | ||
078b3696 | 5292 | \f |
5f5c8ee5 GM |
5293 | /*********************************************************************** |
5294 | X/Y Position -> Buffer Position | |
5295 | ***********************************************************************/ | |
5296 | ||
a1b0a6db | 5297 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5298 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5299 | Return in *POS the position in that object. |
2396cbba EZ |
5300 | Adjust *X and *Y to character positions. |
5301 | Return in *DX and *DY the pixel coordinates of the click, | |
5302 | relative to the top left corner of OBJECT, or relative to | |
5303 | the top left corner of the character glyph at (*X, *Y) | |
5304 | if OBJECT is nil. | |
5305 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5306 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5307 | |
6b61353c | 5308 | Lisp_Object |
971de7fb | 5309 | 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 | 5310 | { |
5f5c8ee5 | 5311 | struct it it; |
707ea971 | 5312 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5313 | struct text_pos startp; |
6b61353c KH |
5314 | Lisp_Object string; |
5315 | struct glyph_row *row; | |
cedd7cd9 KS |
5316 | #ifdef HAVE_WINDOW_SYSTEM |
5317 | struct image *img = 0; | |
5318 | #endif | |
2396cbba | 5319 | int x0, x1, to_x; |
57b3e30b | 5320 | void *itdata = NULL; |
5f5c8ee5 | 5321 | |
707ea971 CY |
5322 | /* We used to set current_buffer directly here, but that does the |
5323 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5324 | Fset_buffer (w->buffer); | |
57b3e30b | 5325 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5326 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5327 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5328 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5329 | start_display (&it, w, startp); | |
352ec8ff EZ |
5330 | /* start_display takes into account the header-line row, but IT's |
5331 | vpos still counts from the glyph row that includes the window's | |
5332 | start position. Adjust for a possible header-line row. */ | |
5333 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; | |
177c0ea7 | 5334 | |
9173a8fb | 5335 | x0 = *x; |
2396cbba EZ |
5336 | |
5337 | /* First, move to the beginning of the row corresponding to *Y. We | |
5338 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5339 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5340 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5341 | ||
5342 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5343 | glyph at *X. We add it.first_visible_x because iterator |
5344 | positions include the hscroll. */ | |
2396cbba EZ |
5345 | to_x = x0 + it.first_visible_x; |
5346 | if (it.bidi_it.paragraph_dir == R2L) | |
5347 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5348 | text area. This is because the iterator, even in R2L | |
5349 | paragraphs, delivers glyphs as if they started at the left | |
5350 | margin of the window. (When we actually produce glyphs for | |
5351 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5352 | iterator doesn't know about that.) The following line adjusts | |
5353 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5354 | move_it_* routines use. (The -1 is because in a window whose |
5355 | text-area width is W, the rightmost pixel position is W-1, and | |
5356 | it should be mirrored into zero pixel position.) */ | |
5357 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5358 | ||
5359 | /* Now move horizontally in the row to the glyph under *X. Second | |
5360 | argument is ZV to prevent move_it_in_display_line from matching | |
5361 | based on buffer positions. */ | |
2396cbba | 5362 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5363 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5364 | |
707ea971 | 5365 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5366 | |
6b61353c KH |
5367 | *dx = x0 + it.first_visible_x - it.current_x; |
5368 | *dy = *y - it.current_y; | |
5369 | ||
5370 | string = w->buffer; | |
5371 | if (STRINGP (it.string)) | |
5372 | string = it.string; | |
a1b0a6db | 5373 | *pos = it.current; |
86282aab KH |
5374 | if (it.what == IT_COMPOSITION |
5375 | && it.cmp_it.nchars > 1 | |
5376 | && it.cmp_it.reversed_p) | |
5377 | { | |
5378 | /* The current display element is a grapheme cluster in a | |
5379 | composition. In that case, we need the position of the first | |
5380 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5381 | it.current points to the last character of the cluster, thus | |
5382 | we must move back to the first character of the same | |
5383 | cluster. */ | |
5384 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5385 | if (STRINGP (it.string)) | |
5386 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5387 | else | |
425cc014 EZ |
5388 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5389 | CHARPOS (pos->pos)); | |
86282aab | 5390 | } |
6b61353c KH |
5391 | |
5392 | #ifdef HAVE_WINDOW_SYSTEM | |
5393 | if (it.what == IT_IMAGE) | |
5394 | { | |
6b61353c KH |
5395 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5396 | && !NILP (img->spec)) | |
5397 | *object = img->spec; | |
5398 | } | |
5399 | #endif | |
5400 | ||
b70d98e1 KS |
5401 | if (it.vpos < w->current_matrix->nrows |
5402 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5403 | row->enabled_p)) | |
6b61353c KH |
5404 | { |
5405 | if (it.hpos < row->used[TEXT_AREA]) | |
5406 | { | |
5407 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5408 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5409 | if (img) |
5410 | { | |
5411 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5412 | *dx += glyph->slice.img.x; |
5413 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5414 | /* Image slices positions are still relative to the entire image */ |
5415 | *width = img->width; | |
5416 | *height = img->height; | |
5417 | } | |
5418 | else | |
6b61353c | 5419 | #endif |
cedd7cd9 KS |
5420 | { |
5421 | *width = glyph->pixel_width; | |
5422 | *height = glyph->ascent + glyph->descent; | |
5423 | } | |
6b61353c KH |
5424 | } |
5425 | else | |
5426 | { | |
5427 | *width = 0; | |
5428 | *height = row->height; | |
5429 | } | |
5430 | } | |
5431 | else | |
5432 | { | |
5433 | *width = *height = 0; | |
5434 | } | |
5435 | ||
5436 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5437 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5438 | if (x0 > x1) |
5439 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5440 | ||
5441 | *x = it.hpos; | |
5442 | *y = it.vpos; | |
5443 | ||
5444 | return string; | |
5f5c8ee5 | 5445 | } |
4588ec20 | 5446 | |
5f5c8ee5 GM |
5447 | |
5448 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5449 | mode line or header line (PART says which) of window W, or nil if none. |
5450 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5451 | |
5452 | Lisp_Object | |
ace1712c | 5453 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5454 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5455 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5456 | { |
5457 | struct glyph_row *row; | |
5458 | struct glyph *glyph, *end; | |
6b61353c | 5459 | int x0, y0; |
5f5c8ee5 GM |
5460 | Lisp_Object string = Qnil; |
5461 | ||
641bdbf3 | 5462 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5463 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5464 | else | |
045dee35 | 5465 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5466 | y0 = *y - row->y; |
5467 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5468 | |
5469 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5470 | { |
5f5c8ee5 GM |
5471 | /* Find the glyph under X. If we find one with a string object, |
5472 | it's the one we were looking for. */ | |
5473 | glyph = row->glyphs[TEXT_AREA]; | |
5474 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5475 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5476 | x0 -= glyph->pixel_width; |
5477 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5478 | if (glyph < end) | |
5479 | { | |
5480 | string = glyph->object; | |
5481 | *charpos = glyph->charpos; | |
5482 | *width = glyph->pixel_width; | |
5483 | *height = glyph->ascent + glyph->descent; | |
5484 | #ifdef HAVE_WINDOW_SYSTEM | |
5485 | if (glyph->type == IMAGE_GLYPH) | |
5486 | { | |
5487 | struct image *img; | |
5488 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5489 | if (img != NULL) | |
5490 | *object = img->spec; | |
5491 | y0 -= row->ascent - glyph->ascent; | |
5492 | } | |
5493 | #endif | |
5494 | } | |
5495 | else | |
5496 | { | |
5497 | /* Add extra (default width) columns if clicked after EOL. */ | |
5498 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5499 | *width = 0; | |
5500 | *height = row->height; | |
5501 | } | |
5502 | } | |
5503 | else | |
5504 | { | |
5505 | *x = 0; | |
5506 | x0 = 0; | |
5507 | *width = *height = 0; | |
4588ec20 | 5508 | } |
5f5c8ee5 | 5509 | |
6b61353c KH |
5510 | *dx = x0; |
5511 | *dy = y0; | |
5512 | ||
5f5c8ee5 | 5513 | return string; |
4588ec20 | 5514 | } |
5f5c8ee5 GM |
5515 | |
5516 | ||
db1db309 GM |
5517 | /* Value is the string under window-relative coordinates X/Y in either |
5518 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5519 | the string returned. */ | |
5520 | ||
5521 | Lisp_Object | |
ace1712c | 5522 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5523 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5524 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5525 | { |
5526 | struct glyph_row *row = w->current_matrix->rows; | |
5527 | struct glyph *glyph, *end; | |
6b61353c | 5528 | int x0, y0, i, wy = *y; |
641bdbf3 | 5529 | int area; |
db1db309 GM |
5530 | Lisp_Object string = Qnil; |
5531 | ||
641bdbf3 | 5532 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5533 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5534 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5535 | area = RIGHT_MARGIN_AREA; |
5536 | else | |
5537 | abort (); | |
5538 | ||
5539 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5540 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5541 | break; | |
6b61353c KH |
5542 | y0 = *y - row->y; |
5543 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5544 | |
5545 | if (row->enabled_p) | |
5546 | { | |
5547 | /* Find the glyph under X. If we find one with a string object, | |
5548 | it's the one we were looking for. */ | |
db1db309 | 5549 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5550 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5551 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5552 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5553 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5554 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5555 | else |
7df02016 | 5556 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5557 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5558 | : 0); |
5559 | ||
6b61353c KH |
5560 | glyph = row->glyphs[area]; |
5561 | end = glyph + row->used[area]; | |
cfde341f | 5562 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5563 | x0 -= glyph->pixel_width; |
5564 | *x = glyph - row->glyphs[area]; | |
5565 | if (glyph < end) | |
5566 | { | |
5567 | string = glyph->object; | |
5568 | *charpos = glyph->charpos; | |
5569 | *width = glyph->pixel_width; | |
5570 | *height = glyph->ascent + glyph->descent; | |
5571 | #ifdef HAVE_WINDOW_SYSTEM | |
5572 | if (glyph->type == IMAGE_GLYPH) | |
5573 | { | |
5574 | struct image *img; | |
5575 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5576 | if (img != NULL) | |
5577 | *object = img->spec; | |
5578 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5579 | x0 += glyph->slice.img.x; |
5580 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5581 | } |
5582 | #endif | |
5583 | } | |
5584 | else | |
5585 | { | |
5586 | /* Add extra (default width) columns if clicked after EOL. */ | |
5587 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5588 | *width = 0; | |
5589 | *height = row->height; | |
5590 | } | |
db1db309 | 5591 | } |
6b61353c KH |
5592 | else |
5593 | { | |
5594 | x0 = 0; | |
5595 | *x = 0; | |
5596 | *width = *height = 0; | |
5597 | } | |
5598 | ||
5599 | *dx = x0; | |
5600 | *dy = y0; | |
db1db309 GM |
5601 | |
5602 | return string; | |
5603 | } | |
5604 | ||
5605 | ||
5f5c8ee5 GM |
5606 | /*********************************************************************** |
5607 | Changing Frame Sizes | |
5608 | ***********************************************************************/ | |
4588ec20 JB |
5609 | |
5610 | #ifdef SIGWINCH | |
5f5c8ee5 | 5611 | |
9af30bdf | 5612 | static void |
971de7fb DN |
5613 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5614 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5615 | { |
5616 | int width, height; | |
4588ec20 JB |
5617 | int old_errno = errno; |
5618 | ||
28d7d09f | 5619 | struct tty_display_info *tty; |
4d553a13 | 5620 | |
333f1b6f JD |
5621 | signal (SIGWINCH, window_change_signal); |
5622 | SIGNAL_THREAD_CHECK (signalnum); | |
5623 | ||
9628b887 KL |
5624 | /* The frame size change obviously applies to a single |
5625 | termcap-controlled terminal, but we can't decide which. | |
5626 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5627 | */ |
5628 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5629 | |
0a125897 KL |
5630 | if (! tty->term_initted) |
5631 | continue; | |
4588ec20 | 5632 | |
db878925 DN |
5633 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5634 | use it. */ | |
5635 | if (!tty->input) | |
5636 | continue; | |
5637 | ||
0b0d3e0b | 5638 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5639 | |
bedeffcf | 5640 | if (width > 5 && height > 2) { |
9628b887 | 5641 | Lisp_Object tail, frame; |
3fc809e2 | 5642 | |
9628b887 | 5643 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5644 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5645 | /* Record the new sizes, but don't reallocate the data | |
5646 | structures now. Let that be done later outside of the | |
5647 | signal handler. */ | |
5648 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5649 | } |
4588ec20 | 5650 | } |
3fc809e2 | 5651 | |
4588ec20 JB |
5652 | errno = old_errno; |
5653 | } | |
5654 | #endif /* SIGWINCH */ | |
5655 | ||
5656 | ||
b96fd3e8 GM |
5657 | /* Do any change in frame size that was requested by a signal. SAFE |
5658 | non-zero means this function is called from a place where it is | |
5659 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5660 | |
dfcf069d | 5661 | void |
971de7fb | 5662 | do_pending_window_change (int safe) |
4588ec20 JB |
5663 | { |
5664 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5665 | if (redisplaying_p && !safe) |
5666 | return; | |
177c0ea7 | 5667 | |
4588ec20 JB |
5668 | while (delayed_size_change) |
5669 | { | |
35f56f96 | 5670 | Lisp_Object tail, frame; |
4588ec20 JB |
5671 | |
5672 | delayed_size_change = 0; | |
5673 | ||
35f56f96 | 5674 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5675 | { |
5f5c8ee5 | 5676 | struct frame *f = XFRAME (frame); |
35f56f96 | 5677 | |
7df02016 KS |
5678 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5679 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5680 | 0, 0, safe); | |
4588ec20 JB |
5681 | } |
5682 | } | |
5683 | } | |
5684 | ||
5685 | ||
502b9b64 | 5686 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5687 | indicate no change is to take place. |
4588ec20 | 5688 | |
b6a65ac2 JB |
5689 | If DELAY is non-zero, then assume we're being called from a signal |
5690 | handler, and queue the change for later - perhaps the next | |
5691 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5692 | from a signal handler. |
5693 | ||
5694 | SAFE non-zero means this function is called from a place where it's | |
5695 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5696 | |
dfcf069d | 5697 | void |
971de7fb | 5698 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5699 | { |
5700 | Lisp_Object tail, frame; | |
3826ea1a | 5701 | |
9628b887 | 5702 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5703 | { |
9628b887 KL |
5704 | /* On MS-DOS, all frames use the same screen, so a change in |
5705 | size affects all frames. Termcap now supports multiple | |
5706 | ttys. */ | |
45140e01 | 5707 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5708 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5709 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5710 | pretend, delay, safe); |
45140e01 RS |
5711 | } |
5712 | else | |
b96fd3e8 | 5713 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5714 | } |
5715 | ||
5716 | static void | |
971de7fb | 5717 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5718 | { |
7df02016 | 5719 | int new_frame_total_cols; |
d311d28c | 5720 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5721 | |
4588ec20 | 5722 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5723 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5724 | { |
7df02016 KS |
5725 | f->new_text_lines = newheight; |
5726 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5727 | delayed_size_change = 1; |
5728 | return; | |
5729 | } | |
5730 | ||
502b9b64 | 5731 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5732 | f->new_text_lines = 0; |
5733 | f->new_text_cols = 0; | |
b6a65ac2 | 5734 | |
08f7aa3e | 5735 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5736 | if (newheight == 0) |
7df02016 | 5737 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5738 | if (newwidth == 0) |
7df02016 | 5739 | newwidth = FRAME_COLS (f); |
3826ea1a | 5740 | |
3b95a6f9 | 5741 | /* Compute width of windows in F. */ |
b6a65ac2 | 5742 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5743 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5744 | |
3b95a6f9 MR |
5745 | /* This is the width of the frame with vertical scroll bars and fringe |
5746 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5747 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5748 | ||
b6a65ac2 | 5749 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5750 | /* Frame width may be unchanged but the text portion may change, for |
5751 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5752 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5753 | /* Text portion unchanged? */ |
5754 | && newwidth == FRAME_COLS (f) | |
5755 | /* Frame width unchanged? */ | |
5756 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5757 | return; |
5758 | ||
cbb95688 RS |
5759 | BLOCK_INPUT; |
5760 | ||
886a8a6c KH |
5761 | #ifdef MSDOS |
5762 | /* We only can set screen dimensions to certain values supported | |
5763 | by our video hardware. Try to find the smallest size greater | |
5764 | or equal to the requested dimensions. */ | |
5765 | dos_set_window_size (&newheight, &newwidth); | |
5766 | #endif | |
5767 | ||
7df02016 | 5768 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5769 | { |
562dd5e9 | 5770 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5771 | |
48e482e6 EZ |
5772 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5773 | manipulating video hardware. */ | |
5774 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5775 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5776 | } |
5777 | ||
7df02016 | 5778 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5779 | { |
562dd5e9 | 5780 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5781 | |
48e482e6 EZ |
5782 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5783 | manipulating video hardware. */ | |
5784 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5785 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5786 | |
9ea173e8 | 5787 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5788 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5789 | } |
5790 | ||
7df02016 KS |
5791 | FRAME_LINES (f) = newheight; |
5792 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5793 | |
5f5c8ee5 GM |
5794 | { |
5795 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5796 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5797 | |
5f5c8ee5 GM |
5798 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5799 | &text_area_height); | |
5800 | if (w->cursor.x >= text_area_x + text_area_width) | |
5801 | w->cursor.hpos = w->cursor.x = 0; | |
5802 | if (w->cursor.y >= text_area_y + text_area_height) | |
5803 | w->cursor.vpos = w->cursor.y = 0; | |
5804 | } | |
986e61b8 | 5805 | |
5f5c8ee5 | 5806 | adjust_glyphs (f); |
5f5c8ee5 | 5807 | calculate_costs (f); |
cb02fa39 GM |
5808 | SET_FRAME_GARBAGED (f); |
5809 | f->resized_p = 1; | |
97cf50e7 RS |
5810 | |
5811 | UNBLOCK_INPUT; | |
61730a69 | 5812 | |
e523f7e5 RS |
5813 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5814 | ||
ef264c42 | 5815 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5816 | |
5817 | unbind_to (count, Qnil); | |
4588ec20 | 5818 | } |
5f5c8ee5 GM |
5819 | |
5820 | ||
4588ec20 | 5821 | \f |
5f5c8ee5 GM |
5822 | /*********************************************************************** |
5823 | Terminal Related Lisp Functions | |
5824 | ***********************************************************************/ | |
5825 | ||
5826 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5827 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5828 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5829 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5830 | (Lisp_Object file) |
5f5c8ee5 | 5831 | { |
0b0d3e0b KL |
5832 | struct tty_display_info *tty; |
5833 | ||
7d2f1216 EZ |
5834 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5835 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5836 | error ("Current frame is not on a tty device"); |
5837 | ||
5838 | tty = CURTTY (); | |
5839 | ||
5840 | if (tty->termscript != 0) | |
e18c7093 KL |
5841 | { |
5842 | BLOCK_INPUT; | |
0b0d3e0b | 5843 | fclose (tty->termscript); |
e18c7093 KL |
5844 | UNBLOCK_INPUT; |
5845 | } | |
0b0d3e0b | 5846 | tty->termscript = 0; |
5f5c8ee5 GM |
5847 | |
5848 | if (! NILP (file)) | |
5849 | { | |
5850 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5851 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5852 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5853 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5854 | } | |
5855 | return Qnil; | |
5856 | } | |
5857 | ||
5858 | ||
4588ec20 | 5859 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5860 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5861 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5862 | Control characters in STRING will have terminal-dependent effects. |
5863 | ||
6ed8eeff | 5864 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5865 | It may be a terminal object, a frame, or nil for the terminal used by |
5866 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5867 | when TERMINAL is nil. */) | |
5842a27b | 5868 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5869 | { |
7cef7ce3 SM |
5870 | struct terminal *t = get_terminal (terminal, 1); |
5871 | FILE *out; | |
0b0d3e0b | 5872 | |
94f3db62 | 5873 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5874 | CHECK_STRING (string); |
2c1e4409 | 5875 | BLOCK_INPUT; |
0b0d3e0b | 5876 | |
6ed8eeff KL |
5877 | if (!t) |
5878 | error ("Unknown terminal device"); | |
0b0d3e0b | 5879 | |
7cef7ce3 SM |
5880 | if (t->type == output_initial) |
5881 | out = stdout; | |
5882 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5883 | error ("Device %d is not a termcap terminal device", t->id); | |
5884 | else | |
5885 | { | |
5886 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5887 | |
7cef7ce3 SM |
5888 | if (! tty->output) |
5889 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5890 | |
7cef7ce3 SM |
5891 | if (tty->termscript) |
5892 | { | |
5893 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5894 | fflush (tty->termscript); | |
5895 | } | |
5896 | out = tty->output; | |
4588ec20 | 5897 | } |
7cef7ce3 SM |
5898 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5899 | fflush (out); | |
2c1e4409 | 5900 | UNBLOCK_INPUT; |
4588ec20 JB |
5901 | return Qnil; |
5902 | } | |
5903 | ||
5f5c8ee5 | 5904 | |
a7ca3326 | 5905 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5906 | doc: /* Beep, or flash the screen. |
228299fa | 5907 | Also, unless an argument is given, |
7ee72033 | 5908 | terminate any keyboard macro currently executing. */) |
5842a27b | 5909 | (Lisp_Object arg) |
4588ec20 | 5910 | { |
efb859b4 | 5911 | if (!NILP (arg)) |
4588ec20 | 5912 | { |
7fa788da RS |
5913 | if (noninteractive) |
5914 | putchar (07); | |
5915 | else | |
385ed61f | 5916 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5917 | } |
5918 | else | |
5919 | bitch_at_user (); | |
5920 | ||
5921 | return Qnil; | |
5922 | } | |
5923 | ||
dfcf069d | 5924 | void |
971de7fb | 5925 | bitch_at_user (void) |
4588ec20 JB |
5926 | { |
5927 | if (noninteractive) | |
5928 | putchar (07); | |
5f5c8ee5 | 5929 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5930 | error ("Keyboard macro terminated by a command ringing the bell"); |
5931 | else | |
385ed61f | 5932 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5933 | } |
5934 | ||
5f5c8ee5 GM |
5935 | |
5936 | \f | |
5937 | /*********************************************************************** | |
5938 | Sleeping, Waiting | |
5939 | ***********************************************************************/ | |
5940 | ||
a7ca3326 | 5941 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5942 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5943 | SECONDS may be a floating-point value, meaning that you can wait for a |
5944 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5945 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5946 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5947 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5948 | { |
d311d28c | 5949 | double duration = extract_float (seconds); |
4588ec20 | 5950 | |
d311d28c PE |
5951 | if (!NILP (milliseconds)) |
5952 | { | |
5953 | CHECK_NUMBER (milliseconds); | |
5954 | duration += XINT (milliseconds) / 1000.0; | |
5955 | } | |
b07646f5 | 5956 | |
d35af63c PE |
5957 | if (0 < duration) |
5958 | { | |
5959 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5960 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5961 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5962 | } | |
4588ec20 JB |
5963 | |
5964 | return Qnil; | |
5965 | } | |
5966 | ||
5f5c8ee5 | 5967 | |
dcd1ca45 | 5968 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5969 | it does redisplay. |
f76475ad | 5970 | |
2bcac766 CY |
5971 | TIMEOUT is number of seconds to wait (float or integer), |
5972 | or t to wait forever. | |
902b9b6d KS |
5973 | READING is 1 if reading input. |
5974 | If DO_DISPLAY is >0 display process output while waiting. | |
5975 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5976 | */ | |
4588ec20 | 5977 | |
f76475ad | 5978 | Lisp_Object |
971de7fb | 5979 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 5980 | { |
d35af63c PE |
5981 | intmax_t sec; |
5982 | int nsec; | |
f222369e | 5983 | |
902b9b6d | 5984 | swallow_events (do_display); |
ccddf474 | 5985 | |
902b9b6d | 5986 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5987 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5988 | return Qnil; |
4588ec20 | 5989 | |
902b9b6d KS |
5990 | if (do_display >= 2) |
5991 | redisplay_preserve_echo_area (2); | |
5992 | ||
d35af63c | 5993 | if (INTEGERP (timeout)) |
2bcac766 | 5994 | { |
d35af63c PE |
5995 | sec = XINT (timeout); |
5996 | if (! (0 < sec)) | |
5997 | return Qt; | |
5998 | nsec = 0; | |
2bcac766 | 5999 | } |
d35af63c | 6000 | else if (FLOATP (timeout)) |
d311d28c | 6001 | { |
d35af63c PE |
6002 | double seconds = XFLOAT_DATA (timeout); |
6003 | if (! (0 < seconds)) | |
d311d28c | 6004 | return Qt; |
d35af63c PE |
6005 | else |
6006 | { | |
6007 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 6008 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
6009 | nsec = EMACS_NSECS (t); |
6010 | } | |
6011 | } | |
6012 | else if (EQ (timeout, Qt)) | |
6013 | { | |
6014 | sec = 0; | |
6015 | nsec = 0; | |
d311d28c | 6016 | } |
d35af63c PE |
6017 | else |
6018 | wrong_type_argument (Qnumberp, timeout); | |
6019 | ||
dfdb645c | 6020 | |
4588ec20 | 6021 | #ifdef SIGIO |
8fc798e9 | 6022 | gobble_input (0); |
f76475ad JB |
6023 | #endif |
6024 | ||
d35af63c | 6025 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6026 | Qnil, NULL, 0); |
f76475ad | 6027 | |
4588ec20 JB |
6028 | return detect_input_pending () ? Qnil : Qt; |
6029 | } | |
6030 | ||
5f5c8ee5 | 6031 | |
a7ca3326 | 6032 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
6033 | doc: /* Perform redisplay. |
6034 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
6035 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
6036 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
6037 | preempted by arriving input, so FORCE does nothing. | |
6038 | ||
6039 | Return t if redisplay was performed, nil if redisplay was preempted | |
6040 | immediately by pending input. */) | |
5842a27b | 6041 | (Lisp_Object force) |
f76475ad | 6042 | { |
d311d28c | 6043 | ptrdiff_t count; |
659d9874 | 6044 | |
902b9b6d KS |
6045 | swallow_events (1); |
6046 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6047 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6048 | || !NILP (Vexecuting_kbd_macro)) |
6049 | return Qnil; | |
f76475ad | 6050 | |
01327edf KS |
6051 | count = SPECPDL_INDEX (); |
6052 | if (!NILP (force) && !redisplay_dont_pause) | |
6053 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6054 | redisplay_preserve_echo_area (2); |
01327edf | 6055 | unbind_to (count, Qnil); |
7ba07a1a | 6056 | return Qt; |
f76475ad | 6057 | } |
5f5c8ee5 GM |
6058 | |
6059 | ||
6060 | \f | |
6061 | /*********************************************************************** | |
6062 | Other Lisp Functions | |
6063 | ***********************************************************************/ | |
6064 | ||
6065 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6066 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6067 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6068 | |
6069 | static Lisp_Object frame_and_buffer_state; | |
6070 | ||
6071 | ||
6072 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6073 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6074 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6075 | VARIABLE is a variable name whose value is either nil or a state vector |
6076 | that will be updated to contain all frames and buffers, | |
228299fa | 6077 | aside from buffers whose names start with space, |
44edd521 RS |
6078 | along with the buffers' read-only and modified flags. This allows a fast |
6079 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6080 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6081 | the current state. |
6082 | ||
6083 | If VARIABLE is nil, an internal variable is used. Users should not | |
6084 | pass nil for VARIABLE. */) | |
5842a27b | 6085 | (Lisp_Object variable) |
5f5c8ee5 | 6086 | { |
44edd521 RS |
6087 | Lisp_Object state, tail, frame, buf; |
6088 | Lisp_Object *vecp, *end; | |
54e1617f | 6089 | ptrdiff_t n; |
5f5c8ee5 | 6090 | |
44edd521 RS |
6091 | if (! NILP (variable)) |
6092 | { | |
6093 | CHECK_SYMBOL (variable); | |
6094 | state = Fsymbol_value (variable); | |
6095 | if (! VECTORP (state)) | |
6096 | goto changed; | |
6097 | } | |
6098 | else | |
6099 | state = frame_and_buffer_state; | |
6100 | ||
6101 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6102 | end = vecp + ASIZE (state); |
44edd521 | 6103 | |
5f5c8ee5 GM |
6104 | FOR_EACH_FRAME (tail, frame) |
6105 | { | |
44edd521 RS |
6106 | if (vecp == end) |
6107 | goto changed; | |
5f5c8ee5 GM |
6108 | if (!EQ (*vecp++, frame)) |
6109 | goto changed; | |
44edd521 RS |
6110 | if (vecp == end) |
6111 | goto changed; | |
5f5c8ee5 GM |
6112 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6113 | goto changed; | |
6114 | } | |
44edd521 | 6115 | /* Check that the buffer info matches. */ |
7539e11f | 6116 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6117 | { |
7539e11f | 6118 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6119 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6120 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6121 | continue; |
44edd521 RS |
6122 | if (vecp == end) |
6123 | goto changed; | |
5f5c8ee5 GM |
6124 | if (!EQ (*vecp++, buf)) |
6125 | goto changed; | |
44edd521 RS |
6126 | if (vecp == end) |
6127 | goto changed; | |
4b4deea2 | 6128 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6129 | goto changed; |
44edd521 RS |
6130 | if (vecp == end) |
6131 | goto changed; | |
5f5c8ee5 GM |
6132 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6133 | goto changed; | |
6134 | } | |
44edd521 RS |
6135 | if (vecp == end) |
6136 | goto changed; | |
5f5c8ee5 GM |
6137 | /* Detect deletion of a buffer at the end of the list. */ |
6138 | if (EQ (*vecp, Qlambda)) | |
6139 | return Qnil; | |
44edd521 RS |
6140 | |
6141 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6142 | changed: |
44edd521 RS |
6143 | /* Count the size we will need. |
6144 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6145 | n = 1; |
6146 | FOR_EACH_FRAME (tail, frame) | |
6147 | n += 2; | |
7539e11f | 6148 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6149 | n += 3; |
44edd521 RS |
6150 | /* Reallocate the vector if data has grown to need it, |
6151 | or if it has shrunk a lot. */ | |
6152 | if (! VECTORP (state) | |
77b37c05 PE |
6153 | || n > ASIZE (state) |
6154 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6155 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6156 | { |
6157 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6158 | if (! NILP (variable)) | |
6159 | Fset (variable, state); | |
6160 | else | |
6161 | frame_and_buffer_state = state; | |
6162 | } | |
6163 | ||
6164 | /* Record the new data in the (possibly reallocated) vector. */ | |
6165 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6166 | FOR_EACH_FRAME (tail, frame) |
6167 | { | |
6168 | *vecp++ = frame; | |
6169 | *vecp++ = XFRAME (frame)->name; | |
6170 | } | |
7539e11f | 6171 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6172 | { |
7539e11f | 6173 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6174 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6175 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6176 | continue; |
6177 | *vecp++ = buf; | |
4b4deea2 | 6178 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6179 | *vecp++ = Fbuffer_modified_p (buf); |
6180 | } | |
6181 | /* Fill up the vector with lambdas (always at least one). */ | |
6182 | *vecp++ = Qlambda; | |
44edd521 | 6183 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6184 | < ASIZE (state)) |
5f5c8ee5 GM |
6185 | *vecp++ = Qlambda; |
6186 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6187 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6188 | > ASIZE (state)) |
5f5c8ee5 GM |
6189 | abort (); |
6190 | return Qt; | |
6191 | } | |
6192 | ||
6193 | ||
4588ec20 | 6194 | \f |
5f5c8ee5 GM |
6195 | /*********************************************************************** |
6196 | Initialization | |
6197 | ***********************************************************************/ | |
6198 | ||
5f5c8ee5 GM |
6199 | /* Initialization done when Emacs fork is started, before doing stty. |
6200 | Determine terminal type and set terminal_driver. Then invoke its | |
6201 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6202 | |
dfcf069d | 6203 | void |
971de7fb | 6204 | init_display (void) |
4588ec20 | 6205 | { |
28d440ab KL |
6206 | char *terminal_type; |
6207 | ||
5f5c8ee5 GM |
6208 | /* Construct the space glyph. */ |
6209 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6210 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6211 | space_glyph.charpos = -1; |
6212 | ||
4588ec20 JB |
6213 | inverse_video = 0; |
6214 | cursor_in_echo_area = 0; | |
6215 | terminal_type = (char *) 0; | |
6216 | ||
1315c181 JB |
6217 | /* Now is the time to initialize this; it's used by init_sys_modes |
6218 | during startup. */ | |
2246281f | 6219 | Vinitial_window_system = Qnil; |
4588ec20 | 6220 | |
4181ad9c KL |
6221 | /* SIGWINCH needs to be handled no matter what display we start |
6222 | with. Otherwise newly opened tty frames will not resize | |
6223 | automatically. */ | |
6224 | #ifdef SIGWINCH | |
6225 | #ifndef CANNOT_DUMP | |
6226 | if (initialized) | |
6227 | #endif /* CANNOT_DUMP */ | |
6228 | signal (SIGWINCH, window_change_signal); | |
6229 | #endif /* SIGWINCH */ | |
4588ec20 | 6230 | |
d6ef42b9 | 6231 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6232 | if (IS_DAEMON) |
6233 | return; | |
d6ef42b9 | 6234 | |
1315c181 JB |
6235 | /* If the user wants to use a window system, we shouldn't bother |
6236 | initializing the terminal. This is especially important when the | |
6237 | terminal is so dumb that emacs gives up before and doesn't bother | |
6238 | using the window system. | |
4588ec20 | 6239 | |
36bbad1d KH |
6240 | If the DISPLAY environment variable is set and nonempty, |
6241 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6242 | |
6243 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6244 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6245 | { |
36bbad1d | 6246 | char *display; |
36bbad1d | 6247 | display = getenv ("DISPLAY"); |
36bbad1d | 6248 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6249 | |
6250 | if (display_arg && !x_display_ok (display)) | |
6251 | { | |
6252 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6253 | display); | |
6254 | inhibit_window_system = 1; | |
6255 | } | |
f040093a | 6256 | } |
d460af17 | 6257 | |
4fcc2638 | 6258 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6259 | { |
111d9af3 | 6260 | Vinitial_window_system = Qx; |
4588ec20 JB |
6261 | #ifdef HAVE_X11 |
6262 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6263 | #endif |
9311dcff | 6264 | #ifdef GNU_LINUX |
039e5d71 | 6265 | /* In some versions of ncurses, |
6a428f77 | 6266 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6267 | So call tgetent. */ |
6268 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6269 | #endif |
5f5c8ee5 | 6270 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6271 | return; |
6272 | } | |
6273 | #endif /* HAVE_X_WINDOWS */ | |
6274 | ||
fd2e066a | 6275 | #ifdef HAVE_NTGUI |
177c0ea7 | 6276 | if (!inhibit_window_system) |
fd2e066a | 6277 | { |
111d9af3 | 6278 | Vinitial_window_system = Qw32; |
fd2e066a | 6279 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6280 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6281 | return; |
6282 | } | |
6283 | #endif /* HAVE_NTGUI */ | |
6284 | ||
edfda783 AR |
6285 | #ifdef HAVE_NS |
6286 | if (!inhibit_window_system | |
6287 | #ifndef CANNOT_DUMP | |
6288 | && initialized | |
6289 | #endif | |
6290 | ) | |
6291 | { | |
111d9af3 | 6292 | Vinitial_window_system = Qns; |
5e617bc2 | 6293 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6294 | adjust_frame_glyphs_initially (); |
6295 | return; | |
6296 | } | |
6297 | #endif | |
6298 | ||
4588ec20 JB |
6299 | /* If no window system has been specified, try to use the terminal. */ |
6300 | if (! isatty (0)) | |
6301 | { | |
1559a86d | 6302 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6303 | exit (1); |
6304 | } | |
6305 | ||
6152361f JR |
6306 | #ifdef WINDOWSNT |
6307 | terminal_type = "w32console"; | |
6308 | #else | |
153a073c | 6309 | /* Look at the TERM variable. */ |
4588ec20 | 6310 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6311 | #endif |
4588ec20 JB |
6312 | if (!terminal_type) |
6313 | { | |
5d12ff0b | 6314 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6315 | if (! inhibit_window_system) |
6316 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6317 | else |
6318 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6319 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6320 | exit (1); |
6321 | } | |
6322 | ||
0a125897 | 6323 | { |
6ed8eeff | 6324 | struct terminal *t; |
3224dac1 KL |
6325 | struct frame *f = XFRAME (selected_frame); |
6326 | ||
6327 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6328 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6329 | |
6330 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6331 | if (f->output_method != output_initial) |
3224dac1 | 6332 | abort (); |
6ed8eeff KL |
6333 | f->output_method = t->type; |
6334 | f->terminal = t; | |
3224dac1 | 6335 | |
6ed8eeff | 6336 | t->reference_count++; |
7ac5dac9 EZ |
6337 | #ifdef MSDOS |
6338 | f->output_data.tty->display_info = &the_only_display_info; | |
6339 | #else | |
6340 | if (f->output_method == output_termcap) | |
6341 | create_tty_output (f); | |
6342 | #endif | |
6ed8eeff | 6343 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6344 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6345 | FrameRows (t->display_info.tty), |
6346 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6347 | |
6ed8eeff KL |
6348 | /* Delete the initial terminal. */ |
6349 | if (--initial_terminal->reference_count == 0 | |
6350 | && initial_terminal->delete_terminal_hook) | |
6351 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6352 | |
6353 | /* Update frame parameters to reflect the new type. */ | |
6354 | Fmodify_frame_parameters | |
6355 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6356 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6357 | if (t->display_info.tty->name) |
6358 | Fmodify_frame_parameters (selected_frame, | |
6359 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6360 | Qnil)); | |
6361 | else | |
6362 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6363 | Qnil)); | |
0a125897 | 6364 | } |
3fc809e2 | 6365 | |
d86c299a | 6366 | { |
91fb7e1b | 6367 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6368 | int width = FRAME_TOTAL_COLS (sf); |
6369 | int height = FRAME_LINES (sf); | |
d86c299a | 6370 | |
5f5c8ee5 | 6371 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6372 | change. It's not clear what better we could do. The rest of |
6373 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6374 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6375 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6376 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6377 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6378 | < (width + 2) * height)) | |
1559a86d | 6379 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6380 | } |
6381 | ||
5f5c8ee5 | 6382 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6383 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6384 | |
5f5c8ee5 GM |
6385 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6386 | if (initialized | |
6387 | && !noninteractive | |
2246281f | 6388 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6389 | { |
6390 | /* For the initial frame, we don't have any way of knowing what | |
6391 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6392 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6393 | |
f9d2fdc4 EZ |
6394 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6395 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6396 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6397 | } | |
5f5c8ee5 GM |
6398 | } |
6399 | ||
6400 | ||
6401 | \f | |
6402 | /*********************************************************************** | |
6403 | Blinking cursor | |
6404 | ***********************************************************************/ | |
6405 | ||
c3f13540 | 6406 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6407 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6408 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6409 | WINDOW nil means use the selected window. SHOW non-nil means |
6410 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6411 | don't show a cursor. */) |
5842a27b | 6412 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6413 | { |
5f5c8ee5 GM |
6414 | /* Don't change cursor state while redisplaying. This could confuse |
6415 | output routines. */ | |
6416 | if (!redisplaying_p) | |
6417 | { | |
6418 | if (NILP (window)) | |
6419 | window = selected_window; | |
6420 | else | |
b7826503 | 6421 | CHECK_WINDOW (window); |
177c0ea7 | 6422 | |
5d7791b3 | 6423 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6424 | } |
6425 | ||
6426 | return Qnil; | |
4588ec20 | 6427 | } |
5f5c8ee5 GM |
6428 | |
6429 | ||
5d7791b3 GM |
6430 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6431 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6432 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6433 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6434 | (Lisp_Object window) |
5d7791b3 GM |
6435 | { |
6436 | struct window *w; | |
177c0ea7 | 6437 | |
5d7791b3 GM |
6438 | if (NILP (window)) |
6439 | window = selected_window; | |
6440 | else | |
b7826503 | 6441 | CHECK_WINDOW (window); |
177c0ea7 | 6442 | |
5d7791b3 | 6443 | w = XWINDOW (window); |
177c0ea7 | 6444 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6445 | } |
6446 | ||
87478b52 SM |
6447 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6448 | Slast_nonminibuf_frame, 0, 0, 0, | |
6449 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6450 | (void) |
87478b52 | 6451 | { |
4958ed94 | 6452 | Lisp_Object frame = Qnil; |
87478b52 | 6453 | |
4958ed94 SM |
6454 | if (last_nonminibuf_frame) |
6455 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6456 | |
6457 | return frame; | |
6458 | } | |
4588ec20 | 6459 | \f |
5f5c8ee5 GM |
6460 | /*********************************************************************** |
6461 | Initialization | |
6462 | ***********************************************************************/ | |
6463 | ||
dfcf069d | 6464 | void |
971de7fb | 6465 | syms_of_display (void) |
4588ec20 | 6466 | { |
502b9b64 | 6467 | defsubr (&Sredraw_frame); |
4588ec20 | 6468 | defsubr (&Sredraw_display); |
078b3696 | 6469 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6470 | defsubr (&Sopen_termscript); |
6471 | defsubr (&Sding); | |
7ba07a1a | 6472 | defsubr (&Sredisplay); |
4588ec20 JB |
6473 | defsubr (&Ssleep_for); |
6474 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6475 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6476 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6477 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6478 | |
e509cfa6 | 6479 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6480 | defsubr (&Sdump_redisplay_history); |
6481 | #endif | |
6482 | ||
d1dad759 | 6483 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6484 | staticpro (&frame_and_buffer_state); |
6485 | ||
cd3520a4 JB |
6486 | DEFSYM (Qdisplay_table, "display-table"); |
6487 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6488 | |
29208e82 | 6489 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6490 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6491 | On most systems, changing this value will affect the amount of padding |
6492 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6493 | |
29208e82 | 6494 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6495 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6496 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6497 | |
29208e82 | 6498 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6499 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6500 | |
6501 | See also `ring-bell-function'. */); | |
177c0ea7 | 6502 | |
29208e82 | 6503 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6504 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6505 | A non-nil value is useful if the terminal can automatically preserve |
6506 | Emacs's frame display when you reenter Emacs. | |
6507 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6508 | |
29208e82 | 6509 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6510 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6511 | The value is a symbol: |
6512 | nil for a termcap frame (a character-only terminal), | |
6513 | 'x' for an Emacs frame that is really an X window, | |
6514 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6515 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6516 | 'pc' for a direct-write MS-DOS frame. | |
6517 | ||
6518 | Use of this variable as a boolean is deprecated. Instead, | |
6519 | use `display-graphic-p' or any of the other `display-*-p' | |
6520 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6521 | |
70b8d0a4 SM |
6522 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6523 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6524 | The value is a symbol: |
6525 | nil for a termcap frame (a character-only terminal), | |
6526 | 'x' for an Emacs frame that is really an X window, | |
6527 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6528 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6529 | 'pc' for a direct-write MS-DOS frame. | |
6530 | ||
6531 | Use of this variable as a boolean is deprecated. Instead, | |
6532 | use `display-graphic-p' or any of the other `display-*-p' | |
6533 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6534 | |
29208e82 | 6535 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6536 | doc: /* The version number of the window system in use. |
c22140f6 | 6537 | For X windows, this is 11. */); |
177c0ea7 | 6538 | |
29208e82 | 6539 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6540 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6541 | |
29208e82 | 6542 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6543 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6544 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6545 | Each element can be: | |
6546 | integer: a glyph code which this glyph is an alias for. | |
6547 | string: output this glyph using that string (not impl. in X windows). | |
6548 | nil: this glyph mod 524288 is the code of a character to output, | |
6549 | and this glyph / 524288 is the face number (see `face-id') to use | |
6550 | while outputting it. */); | |
4588ec20 JB |
6551 | Vglyph_table = Qnil; |
6552 | ||
29208e82 | 6553 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6554 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6555 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6556 | Vstandard_display_table = Qnil; |
6557 | ||
29208e82 | 6558 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6559 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6560 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6561 | |
d012c62b | 6562 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6563 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6564 | doc: /* Period in seconds between checking for input during redisplay. |
6565 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6566 | case, arriving input preempts redisplay until the input is processed. | |
6567 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6568 | Vredisplay_preemption_period = make_float (0.10); |
6569 | #endif | |
6570 | ||
4588ec20 JB |
6571 | #ifdef CANNOT_DUMP |
6572 | if (noninteractive) | |
6573 | #endif | |
6574 | { | |
2246281f | 6575 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6576 | Vwindow_system_version = Qnil; |
6577 | } | |
6578 | } |