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 | { |
23f86fce | 347 | struct glyph_matrix *result = xzalloc (sizeof *result); |
4588ec20 | 348 | |
5f5c8ee5 GM |
349 | /* Increment number of allocated matrices. This count is used |
350 | to detect memory leaks. */ | |
351 | ++glyph_matrix_count; | |
4588ec20 | 352 | |
5f5c8ee5 GM |
353 | /* Set pool and return. */ |
354 | result->pool = pool; | |
355 | return result; | |
4588ec20 JB |
356 | } |
357 | ||
4588ec20 | 358 | |
5f5c8ee5 GM |
359 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
360 | ||
361 | The global counter glyph_matrix_count is decremented when a matrix | |
362 | is freed. If the count gets negative, more structures were freed | |
363 | than allocated, i.e. one matrix was freed more than once or a bogus | |
364 | pointer was passed to this function. | |
177c0ea7 | 365 | |
5f5c8ee5 GM |
366 | If MATRIX->pool is null, this means that the matrix manages its own |
367 | glyph memory---this is done for matrices on X frames. Freeing the | |
368 | matrix also frees the glyph memory in this case. */ | |
369 | ||
370 | static void | |
971de7fb | 371 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 372 | { |
5f5c8ee5 GM |
373 | if (matrix) |
374 | { | |
375 | int i; | |
376 | ||
377 | /* Detect the case that more matrices are freed than were | |
378 | allocated. */ | |
379 | if (--glyph_matrix_count < 0) | |
380 | abort (); | |
381 | ||
382 | /* Free glyph memory if MATRIX owns it. */ | |
383 | if (matrix->pool == NULL) | |
384 | for (i = 0; i < matrix->rows_allocated; ++i) | |
385 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 386 | |
5f5c8ee5 GM |
387 | /* Free row structures and the matrix itself. */ |
388 | xfree (matrix->rows); | |
389 | xfree (matrix); | |
390 | } | |
391 | } | |
4588ec20 | 392 | |
4588ec20 | 393 | |
5f5c8ee5 GM |
394 | /* Return the number of glyphs to reserve for a marginal area of |
395 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
396 | display line of window W. MARGIN gives the width of the marginal | |
397 | area in canonical character units. MARGIN should be an integer | |
398 | or a float. */ | |
399 | ||
400 | static int | |
971de7fb | 401 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
402 | { |
403 | int n; | |
4588ec20 | 404 | |
5f5c8ee5 | 405 | if (NUMBERP (margin)) |
4588ec20 | 406 | { |
7df02016 | 407 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
408 | double d = max (0, XFLOATINT (margin)); |
409 | d = min (width / 2 - 1, d); | |
35ec832e | 410 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
411 | } |
412 | else | |
413 | n = 0; | |
414 | ||
415 | return n; | |
416 | } | |
417 | ||
e509cfa6 DA |
418 | /* Return non-zero if ROW's hash value is correct, zero if not. |
419 | Optimized away if ENABLE_CHECKING is not defined. */ | |
420 | ||
a54e2c05 | 421 | static int |
7a7270dd EZ |
422 | verify_row_hash (struct glyph_row *row) |
423 | { | |
015137db | 424 | return row->hash == row_hash (row); |
7a7270dd | 425 | } |
4588ec20 | 426 | |
5f5c8ee5 GM |
427 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
428 | window sizes. | |
4588ec20 | 429 | |
5f5c8ee5 GM |
430 | W is null if the function is called for a frame glyph matrix. |
431 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
432 | indices of the first column and row of MATRIX within the frame | |
433 | matrix, if such a matrix exists. They are zero for purely | |
434 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 435 | |
5f5c8ee5 GM |
436 | In window-based redisplay, where no frame matrices exist, glyph |
437 | matrices manage their own glyph storage. Otherwise, they allocate | |
438 | storage from a common frame glyph pool which can be found in | |
439 | MATRIX->pool. | |
23b0200c | 440 | |
5f5c8ee5 GM |
441 | The reason for this memory management strategy is to avoid complete |
442 | frame redraws if possible. When we allocate from a common pool, a | |
443 | change of the location or size of a sub-matrix within the pool | |
444 | requires a complete redisplay of the frame because we cannot easily | |
445 | make sure that the current matrices of all windows still agree with | |
446 | what is displayed on the screen. While this is usually fast, it | |
447 | leads to screen flickering. */ | |
23b0200c | 448 | |
5f5c8ee5 | 449 | static void |
971de7fb | 450 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
451 | { |
452 | int i; | |
453 | int new_rows; | |
454 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
455 | int header_line_changed_p = 0; |
456 | int header_line_p = 0; | |
5f5c8ee5 | 457 | int left = -1, right = -1; |
ca8a12a7 | 458 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 459 | |
6b61353c KH |
460 | /* See if W had a header line that has disappeared now, or vice versa. |
461 | Get W's size. */ | |
5f5c8ee5 GM |
462 | if (w) |
463 | { | |
6b61353c KH |
464 | window_box (w, -1, 0, 0, &window_width, &window_height); |
465 | ||
045dee35 GM |
466 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
467 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 468 | } |
045dee35 | 469 | matrix->header_line_p = header_line_p; |
23b0200c | 470 | |
6b61353c KH |
471 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
472 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
473 | haven't changed. This optimization is important because preserving |
474 | the matrix means preventing redisplay. */ | |
475 | if (matrix->pool == NULL) | |
476 | { | |
7df02016 KS |
477 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
478 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
a54e2c05 | 479 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
480 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs |
481 | || right != matrix->right_margin_glyphs); | |
482 | ||
483 | if (!marginal_areas_changed_p | |
484 | && !fonts_changed_p | |
045dee35 | 485 | && !header_line_changed_p |
7df02016 KS |
486 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
487 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
488 | && matrix->window_height == window_height |
489 | && matrix->window_vscroll == w->vscroll | |
490 | && matrix->window_width == window_width) | |
491 | return; | |
492 | } | |
177c0ea7 | 493 | |
5f5c8ee5 GM |
494 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
495 | if (matrix->rows_allocated < dim.height) | |
496 | { | |
0065d054 | 497 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 498 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
499 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
500 | new_rows, INT_MAX, sizeof *matrix->rows); | |
501 | memset (matrix->rows + old_alloc, 0, | |
502 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
503 | } |
504 | else | |
505 | new_rows = 0; | |
60a8948a | 506 | |
5f5c8ee5 GM |
507 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
508 | on a frame not using window-based redisplay. Set up pointers for | |
509 | each row into the glyph pool. */ | |
510 | if (matrix->pool) | |
511 | { | |
a54e2c05 | 512 | eassert (matrix->pool->glyphs); |
177c0ea7 | 513 | |
5f5c8ee5 | 514 | if (w) |
60a8948a | 515 | { |
5f5c8ee5 | 516 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 517 | w->left_margin_cols); |
5f5c8ee5 | 518 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 519 | w->right_margin_cols); |
60a8948a | 520 | } |
5f5c8ee5 GM |
521 | else |
522 | left = right = 0; | |
177c0ea7 | 523 | |
5f5c8ee5 | 524 | for (i = 0; i < dim.height; ++i) |
60a8948a | 525 | { |
5f5c8ee5 | 526 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
527 | |
528 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
529 | = (matrix->pool->glyphs |
530 | + (y + i) * matrix->pool->ncolumns | |
531 | + x); | |
177c0ea7 | 532 | |
5f5c8ee5 GM |
533 | if (w == NULL |
534 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 535 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
536 | { |
537 | row->glyphs[TEXT_AREA] | |
538 | = row->glyphs[LEFT_MARGIN_AREA]; | |
539 | row->glyphs[RIGHT_MARGIN_AREA] | |
540 | = row->glyphs[TEXT_AREA] + dim.width; | |
541 | row->glyphs[LAST_AREA] | |
542 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
543 | } | |
544 | else | |
545 | { | |
546 | row->glyphs[TEXT_AREA] | |
547 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
548 | row->glyphs[RIGHT_MARGIN_AREA] | |
549 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
550 | row->glyphs[LAST_AREA] | |
551 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
552 | } | |
60a8948a | 553 | } |
177c0ea7 | 554 | |
5f5c8ee5 GM |
555 | matrix->left_margin_glyphs = left; |
556 | matrix->right_margin_glyphs = right; | |
557 | } | |
558 | else | |
559 | { | |
560 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
561 | its own memory. It is a window matrix for window-based redisplay. |
562 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
563 | if (dim.width > matrix->matrix_w |
564 | || new_rows | |
045dee35 | 565 | || header_line_changed_p |
5f5c8ee5 | 566 | || marginal_areas_changed_p) |
4588ec20 | 567 | { |
5f5c8ee5 GM |
568 | struct glyph_row *row = matrix->rows; |
569 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 570 | |
5f5c8ee5 GM |
571 | while (row < end) |
572 | { | |
573 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
574 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
575 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 576 | |
5f5c8ee5 GM |
577 | /* The mode line never has marginal areas. */ |
578 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 579 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
580 | { |
581 | row->glyphs[TEXT_AREA] | |
582 | = row->glyphs[LEFT_MARGIN_AREA]; | |
583 | row->glyphs[RIGHT_MARGIN_AREA] | |
584 | = row->glyphs[TEXT_AREA] + dim.width; | |
585 | row->glyphs[LAST_AREA] | |
586 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
587 | } | |
588 | else | |
589 | { | |
590 | row->glyphs[TEXT_AREA] | |
591 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
592 | row->glyphs[RIGHT_MARGIN_AREA] | |
593 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
594 | row->glyphs[LAST_AREA] | |
595 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
596 | } | |
597 | ++row; | |
598 | } | |
4588ec20 JB |
599 | } |
600 | ||
a54e2c05 | 601 | eassert (left >= 0 && right >= 0); |
5f5c8ee5 GM |
602 | matrix->left_margin_glyphs = left; |
603 | matrix->right_margin_glyphs = right; | |
604 | } | |
177c0ea7 | 605 | |
5f5c8ee5 GM |
606 | /* Number of rows to be used by MATRIX. */ |
607 | matrix->nrows = dim.height; | |
a54e2c05 | 608 | eassert (matrix->nrows >= 0); |
5f5c8ee5 | 609 | |
b7b20fbd | 610 | if (w) |
5f5c8ee5 | 611 | { |
b7b20fbd | 612 | if (matrix == w->current_matrix) |
4588ec20 | 613 | { |
b7b20fbd GM |
614 | /* Mark rows in a current matrix of a window as not having |
615 | valid contents. It's important to not do this for | |
616 | desired matrices. When Emacs starts, it may already be | |
617 | building desired matrices when this function runs. */ | |
618 | if (window_width < 0) | |
619 | window_width = window_box_width (w, -1); | |
177c0ea7 | 620 | |
b7b20fbd GM |
621 | /* Optimize the case that only the height has changed (C-x 2, |
622 | upper window). Invalidate all rows that are no longer part | |
623 | of the window. */ | |
624 | if (!marginal_areas_changed_p | |
73d75a62 GM |
625 | && !header_line_changed_p |
626 | && new_rows == 0 | |
627 | && dim.width == matrix->matrix_w | |
7df02016 KS |
628 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
629 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 630 | && matrix->window_width == window_width) |
b7b20fbd | 631 | { |
dd42b31a GM |
632 | /* Find the last row in the window. */ |
633 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
634 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
635 | { | |
26447967 | 636 | ++i; |
dd42b31a GM |
637 | break; |
638 | } | |
b7b20fbd GM |
639 | |
640 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 641 | are invalidated below. */ |
b7b20fbd GM |
642 | if (INTEGERP (w->window_end_vpos) |
643 | && XFASTINT (w->window_end_vpos) >= i) | |
644 | w->window_end_valid = Qnil; | |
177c0ea7 | 645 | |
b7b20fbd GM |
646 | while (i < matrix->nrows) |
647 | matrix->rows[i++].enabled_p = 0; | |
648 | } | |
649 | else | |
650 | { | |
651 | for (i = 0; i < matrix->nrows; ++i) | |
652 | matrix->rows[i].enabled_p = 0; | |
653 | } | |
5f5c8ee5 | 654 | } |
b7b20fbd | 655 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 656 | { |
b7b20fbd GM |
657 | /* Rows in desired matrices always have to be cleared; |
658 | redisplay expects this is the case when it runs, so it | |
659 | had better be the case when we adjust matrices between | |
660 | redisplays. */ | |
5f5c8ee5 GM |
661 | for (i = 0; i < matrix->nrows; ++i) |
662 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 663 | } |
4588ec20 | 664 | } |
177c0ea7 JB |
665 | |
666 | ||
5f5c8ee5 GM |
667 | /* Remember last values to be able to optimize frame redraws. */ |
668 | matrix->matrix_x = x; | |
669 | matrix->matrix_y = y; | |
670 | matrix->matrix_w = dim.width; | |
671 | matrix->matrix_h = dim.height; | |
672 | ||
673 | /* Record the top y location and height of W at the time the matrix | |
674 | was last adjusted. This is used to optimize redisplay above. */ | |
675 | if (w) | |
4588ec20 | 676 | { |
7df02016 KS |
677 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
678 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
679 | matrix->window_height = window_height; |
680 | matrix->window_width = window_width; | |
681 | matrix->window_vscroll = w->vscroll; | |
682 | } | |
683 | } | |
4588ec20 | 684 | |
4588ec20 | 685 | |
5f5c8ee5 GM |
686 | /* Reverse the contents of rows in MATRIX between START and END. The |
687 | contents of the row at END - 1 end up at START, END - 2 at START + | |
688 | 1 etc. This is part of the implementation of rotate_matrix (see | |
689 | below). */ | |
d52bad65 | 690 | |
5f5c8ee5 | 691 | static void |
971de7fb | 692 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
693 | { |
694 | int i, j; | |
23b0200c | 695 | |
5f5c8ee5 GM |
696 | for (i = start, j = end - 1; i < j; ++i, --j) |
697 | { | |
698 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
699 | initialization. */ | |
700 | struct glyph_row temp; | |
701 | temp = matrix->rows[i]; | |
702 | matrix->rows[i] = matrix->rows[j]; | |
703 | matrix->rows[j] = temp; | |
704 | } | |
705 | } | |
23b0200c | 706 | |
23b0200c | 707 | |
5f5c8ee5 GM |
708 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
709 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
710 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
711 | row structures are moved around). | |
60a8948a | 712 | |
5f5c8ee5 GM |
713 | The algorithm used for rotating the vector was, I believe, first |
714 | described by Kernighan. See the vector R as consisting of two | |
715 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
716 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
717 | and reverse the result to get (ArBr)r which is BA. Similar for | |
718 | rotating right. */ | |
719 | ||
720 | void | |
971de7fb | 721 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
722 | { |
723 | if (by < 0) | |
724 | { | |
725 | /* Up (rotate left, i.e. towards lower indices). */ | |
726 | by = -by; | |
727 | reverse_rows (matrix, first, first + by); | |
728 | reverse_rows (matrix, first + by, last); | |
729 | reverse_rows (matrix, first, last); | |
730 | } | |
731 | else if (by > 0) | |
732 | { | |
733 | /* Down (rotate right, i.e. towards higher indices). */ | |
734 | reverse_rows (matrix, last - by, last); | |
735 | reverse_rows (matrix, first, last - by); | |
736 | reverse_rows (matrix, first, last); | |
737 | } | |
738 | } | |
739 | ||
740 | ||
741 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
742 | with indices START <= index < END. Increment positions by DELTA/ | |
743 | DELTA_BYTES. */ | |
744 | ||
745 | void | |
ace1712c | 746 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
d311d28c | 747 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
748 | { |
749 | /* Check that START and END are reasonable values. */ | |
a54e2c05 DA |
750 | eassert (start >= 0 && start <= matrix->nrows); |
751 | eassert (end >= 0 && end <= matrix->nrows); | |
752 | eassert (start <= end); | |
5f5c8ee5 GM |
753 | |
754 | for (; start < end; ++start) | |
86c11ba1 | 755 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
756 | } |
757 | ||
758 | ||
759 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
760 | the row indices of the first and last + 1 row to enable. If | |
761 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
762 | ||
763 | void | |
971de7fb | 764 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 765 | { |
a54e2c05 DA |
766 | eassert (start <= end); |
767 | eassert (start >= 0 && start < matrix->nrows); | |
768 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 769 | |
5f5c8ee5 GM |
770 | for (; start < end; ++start) |
771 | matrix->rows[start].enabled_p = enabled_p != 0; | |
772 | } | |
773 | ||
774 | ||
775 | /* Clear MATRIX. | |
776 | ||
777 | This empties all rows in MATRIX by setting the enabled_p flag for | |
778 | all rows of the matrix to zero. The function prepare_desired_row | |
779 | will eventually really clear a row when it sees one with a zero | |
780 | enabled_p flag. | |
781 | ||
782 | Resets update hints to defaults value. The only update hint | |
783 | currently present is the flag MATRIX->no_scrolling_p. */ | |
784 | ||
785 | void | |
971de7fb | 786 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
787 | { |
788 | if (matrix) | |
789 | { | |
790 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
791 | matrix->no_scrolling_p = 0; | |
792 | } | |
793 | } | |
177c0ea7 | 794 | |
5f5c8ee5 GM |
795 | |
796 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
797 | Increment y-positions in glyph rows between START and END by DY, | |
798 | and recompute their visible height. */ | |
799 | ||
800 | void | |
971de7fb | 801 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
802 | { |
803 | int min_y, max_y; | |
177c0ea7 | 804 | |
a54e2c05 DA |
805 | eassert (start <= end); |
806 | eassert (start >= 0 && start < matrix->nrows); | |
807 | eassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 808 | |
7df02016 KS |
809 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
810 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 811 | |
5f5c8ee5 GM |
812 | for (; start < end; ++start) |
813 | { | |
814 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 815 | |
5f5c8ee5 | 816 | row->y += dy; |
d6c747a4 | 817 | row->visible_height = row->height; |
177c0ea7 | 818 | |
5f5c8ee5 | 819 | if (row->y < min_y) |
d6c747a4 GM |
820 | row->visible_height -= min_y - row->y; |
821 | if (row->y + row->height > max_y) | |
822 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
823 | if (row->fringe_bitmap_periodic_p) |
824 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
825 | } |
826 | } | |
827 | ||
828 | ||
829 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
830 | invalid is done by setting enabled_p to zero for all rows in a | |
831 | current matrix. */ | |
832 | ||
833 | void | |
971de7fb | 834 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
835 | { |
836 | /* Clear frame current matrix, if we have one. */ | |
837 | if (f->current_matrix) | |
838 | clear_glyph_matrix (f->current_matrix); | |
839 | ||
840 | /* Clear the matrix of the menu bar window, if such a window exists. | |
841 | The menu bar window is currently used to display menus on X when | |
842 | no toolkit support is compiled in. */ | |
843 | if (WINDOWP (f->menu_bar_window)) | |
844 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
845 | ||
9ea173e8 GM |
846 | /* Clear the matrix of the tool-bar window, if any. */ |
847 | if (WINDOWP (f->tool_bar_window)) | |
848 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
849 | |
850 | /* Clear current window matrices. */ | |
a54e2c05 | 851 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
852 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); |
853 | } | |
854 | ||
855 | ||
856 | /* Clear out all display lines of F for a coming redisplay. */ | |
857 | ||
858 | void | |
971de7fb | 859 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
860 | { |
861 | if (f->desired_matrix) | |
862 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 863 | |
5f5c8ee5 GM |
864 | if (WINDOWP (f->menu_bar_window)) |
865 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
866 | ||
9ea173e8 GM |
867 | if (WINDOWP (f->tool_bar_window)) |
868 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
869 | |
870 | /* Do it for window matrices. */ | |
a54e2c05 | 871 | eassert (WINDOWP (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 GM |
872 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); |
873 | } | |
874 | ||
875 | ||
876 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
877 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
878 | ||
879 | static void | |
971de7fb | 880 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
881 | { |
882 | while (w) | |
883 | { | |
884 | if (!NILP (w->hchild)) | |
885 | { | |
a54e2c05 | 886 | eassert (WINDOWP (w->hchild)); |
5f5c8ee5 GM |
887 | clear_window_matrices (XWINDOW (w->hchild), desired_p); |
888 | } | |
889 | else if (!NILP (w->vchild)) | |
890 | { | |
a54e2c05 | 891 | eassert (WINDOWP (w->vchild)); |
5f5c8ee5 GM |
892 | clear_window_matrices (XWINDOW (w->vchild), desired_p); |
893 | } | |
894 | else | |
895 | { | |
896 | if (desired_p) | |
897 | clear_glyph_matrix (w->desired_matrix); | |
898 | else | |
899 | { | |
900 | clear_glyph_matrix (w->current_matrix); | |
901 | w->window_end_valid = Qnil; | |
902 | } | |
903 | } | |
904 | ||
905 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
906 | } | |
907 | } | |
908 | ||
909 | ||
910 | \f | |
911 | /*********************************************************************** | |
912 | Glyph Rows | |
913 | ||
914 | See dispextern.h for an overall explanation of glyph rows. | |
915 | ***********************************************************************/ | |
916 | ||
917 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
918 | changes in the glyph_row structure, i.e. addition or removal of | |
919 | structure members. */ | |
920 | ||
2cca872d KH |
921 | static struct glyph_row null_row; |
922 | ||
5f5c8ee5 | 923 | void |
971de7fb | 924 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
925 | { |
926 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
927 | |
928 | /* Save pointers. */ | |
929 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
930 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
931 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
932 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
933 | ||
934 | /* Clear. */ | |
935 | *row = null_row; | |
936 | ||
937 | /* Restore pointers. */ | |
938 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
939 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
940 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
941 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
942 | |
943 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
944 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
945 | Redisplay outputs such glyphs, and flickering effects were | |
946 | the result. This also depended on the contents of memory | |
947 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 948 | the code below. If the flickering is gone with that, chances |
45560b1a | 949 | are that the flickering has the same reason as here. */ |
72af86bd | 950 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 951 | #endif |
5f5c8ee5 GM |
952 | } |
953 | ||
954 | ||
955 | /* Make ROW an empty, enabled row of canonical character height, | |
956 | in window W starting at y-position Y. */ | |
957 | ||
958 | void | |
971de7fb | 959 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
960 | { |
961 | int min_y, max_y; | |
177c0ea7 | 962 | |
7df02016 KS |
963 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
964 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 965 | |
5f5c8ee5 GM |
966 | clear_glyph_row (row); |
967 | row->y = y; | |
408f5064 | 968 | row->ascent = row->phys_ascent = 0; |
7df02016 | 969 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 970 | row->visible_height = row->height; |
177c0ea7 | 971 | |
5f5c8ee5 | 972 | if (row->y < min_y) |
d6c747a4 GM |
973 | row->visible_height -= min_y - row->y; |
974 | if (row->y + row->height > max_y) | |
975 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
976 | |
977 | row->enabled_p = 1; | |
978 | } | |
979 | ||
980 | ||
981 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
982 | are the amounts by which to change positions. Note that the first | |
983 | glyph of the text area of a row can have a buffer position even if | |
984 | the used count of the text area is zero. Such rows display line | |
985 | ends. */ | |
986 | ||
5bf46f05 | 987 | static void |
ace1712c | 988 | increment_row_positions (struct glyph_row *row, |
d311d28c | 989 | ptrdiff_t delta, ptrdiff_t delta_bytes) |
5f5c8ee5 GM |
990 | { |
991 | int area, i; | |
992 | ||
993 | /* Increment start and end positions. */ | |
994 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
995 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
996 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
997 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
998 | CHARPOS (row->start.pos) += delta; |
999 | BYTEPOS (row->start.pos) += delta_bytes; | |
1000 | CHARPOS (row->end.pos) += delta; | |
1001 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1002 | |
5cacdcfd KS |
1003 | if (!row->enabled_p) |
1004 | return; | |
1005 | ||
5f5c8ee5 GM |
1006 | /* Increment positions in glyphs. */ |
1007 | for (area = 0; area < LAST_AREA; ++area) | |
1008 | for (i = 0; i < row->used[area]; ++i) | |
1009 | if (BUFFERP (row->glyphs[area][i].object) | |
1010 | && row->glyphs[area][i].charpos > 0) | |
1011 | row->glyphs[area][i].charpos += delta; | |
1012 | ||
1013 | /* Capture the case of rows displaying a line end. */ | |
1014 | if (row->used[TEXT_AREA] == 0 | |
1015 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1016 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1017 | } | |
1018 | ||
1019 | ||
9af3e742 | 1020 | #if 0 |
5f5c8ee5 GM |
1021 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1022 | contents, i.e. glyph structure contents are exchanged between A and | |
1023 | B without changing glyph pointers in A and B. */ | |
1024 | ||
1025 | static void | |
1dae0f0a | 1026 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1027 | { |
1028 | int area; | |
1029 | ||
1030 | for (area = 0; area < LAST_AREA; ++area) | |
1031 | { | |
1032 | /* Number of glyphs to swap. */ | |
1033 | int max_used = max (a->used[area], b->used[area]); | |
1034 | ||
1035 | /* Start of glyphs in area of row A. */ | |
1036 | struct glyph *glyph_a = a->glyphs[area]; | |
1037 | ||
1038 | /* End + 1 of glyphs in area of row A. */ | |
1039 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1040 | ||
1041 | /* Start of glyphs in area of row B. */ | |
1042 | struct glyph *glyph_b = b->glyphs[area]; | |
1043 | ||
1044 | while (glyph_a < glyph_a_end) | |
1045 | { | |
1046 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1047 | initialization. */ | |
1048 | struct glyph temp; | |
1049 | temp = *glyph_a; | |
1050 | *glyph_a = *glyph_b; | |
1051 | *glyph_b = temp; | |
1052 | ++glyph_a; | |
1053 | ++glyph_b; | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | ||
9af3e742 | 1058 | #endif /* 0 */ |
5f5c8ee5 | 1059 | |
015137db EZ |
1060 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1061 | exchange the used[] array and the hash values of the rows, because | |
1062 | these should all go together for the row's hash value to be | |
1063 | correct. */ | |
5f5c8ee5 | 1064 | |
55d4c1b2 | 1065 | static inline void |
971de7fb | 1066 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1067 | { |
1068 | int i; | |
015137db EZ |
1069 | unsigned hash_tem = a->hash; |
1070 | ||
5f5c8ee5 GM |
1071 | for (i = 0; i < LAST_AREA + 1; ++i) |
1072 | { | |
1073 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1074 | |
5f5c8ee5 GM |
1075 | a->glyphs[i] = b->glyphs[i]; |
1076 | b->glyphs[i] = temp; | |
73055685 EZ |
1077 | if (i < LAST_AREA) |
1078 | { | |
1079 | short used_tem = a->used[i]; | |
1080 | ||
1081 | a->used[i] = b->used[i]; | |
1082 | b->used[i] = used_tem; | |
1083 | } | |
5f5c8ee5 | 1084 | } |
015137db EZ |
1085 | a->hash = b->hash; |
1086 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1087 | } |
1088 | ||
1089 | ||
1090 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1091 | that glyph pointers, the `used' counts, and the hash values in the |
1092 | structures are left unchanged. */ | |
5f5c8ee5 | 1093 | |
55d4c1b2 | 1094 | static inline void |
971de7fb | 1095 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1096 | { |
1097 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1098 | short used[LAST_AREA]; |
015137db | 1099 | unsigned hashval; |
5f5c8ee5 GM |
1100 | |
1101 | /* Save glyph pointers of TO. */ | |
72af86bd | 1102 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1103 | memcpy (used, to->used, sizeof to->used); |
1104 | hashval = to->hash; | |
5f5c8ee5 GM |
1105 | |
1106 | /* Do a structure assignment. */ | |
1107 | *to = *from; | |
1108 | ||
1109 | /* Restore original pointers of TO. */ | |
72af86bd | 1110 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1111 | memcpy (to->used, used, sizeof to->used); |
1112 | to->hash = hashval; | |
5f5c8ee5 GM |
1113 | } |
1114 | ||
1115 | ||
5f5c8ee5 GM |
1116 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1117 | assignment TO = FROM, except that glyph pointers are not copied but | |
1118 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1119 | a memory leak. */ | |
1120 | ||
55d4c1b2 | 1121 | static inline void |
971de7fb | 1122 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1123 | { |
1124 | swap_glyph_pointers (to, from); | |
1125 | copy_row_except_pointers (to, from); | |
1126 | } | |
1127 | ||
1128 | ||
1129 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1130 | a row in a window matrix, is a slice of the glyph memory of the | |
1131 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1132 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1133 | memory of FRAME_ROW. */ | |
1134 | ||
e509cfa6 | 1135 | #ifdef GLYPH_DEBUG |
9339e87f | 1136 | |
5f5c8ee5 | 1137 | static int |
59fc5cf9 | 1138 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1139 | { |
1140 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1141 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1142 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1143 | ||
1144 | return (frame_glyph_start <= window_glyph_start | |
1145 | && window_glyph_start < frame_glyph_end); | |
1146 | } | |
1147 | ||
9339e87f | 1148 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1149 | |
9af3e742 GM |
1150 | #if 0 |
1151 | ||
5f5c8ee5 GM |
1152 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1153 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1154 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1155 | ||
1156 | static struct glyph_row * | |
59fc5cf9 AS |
1157 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1158 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1159 | { |
1160 | int i; | |
1161 | ||
a54e2c05 | 1162 | eassert (row >= 0 && row < frame_matrix->nrows); |
5f5c8ee5 GM |
1163 | |
1164 | for (i = 0; i < window_matrix->nrows; ++i) | |
1165 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1166 | frame_matrix->rows + row)) | |
1167 | break; | |
1168 | ||
1169 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1170 | } | |
1171 | ||
9af3e742 | 1172 | #endif /* 0 */ |
5f5c8ee5 GM |
1173 | |
1174 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1175 | i.e. they are only marked as to be cleared by setting their | |
1176 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1177 | call to this function really clears it. */ | |
1178 | ||
1179 | void | |
971de7fb | 1180 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1181 | { |
1182 | if (!row->enabled_p) | |
1183 | { | |
dfd153ae | 1184 | int rp = row->reversed_p; |
5009f85e | 1185 | |
5f5c8ee5 GM |
1186 | clear_glyph_row (row); |
1187 | row->enabled_p = 1; | |
5009f85e | 1188 | row->reversed_p = rp; |
5f5c8ee5 GM |
1189 | } |
1190 | } | |
1191 | ||
1192 | ||
1193 | /* Return a hash code for glyph row ROW. */ | |
1194 | ||
2f7c71a1 | 1195 | static int |
971de7fb | 1196 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1197 | { |
1198 | int hash = 0; | |
177c0ea7 | 1199 | |
5f5c8ee5 GM |
1200 | if (row->enabled_p) |
1201 | { | |
4cecaab8 MB |
1202 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1203 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1204 | ||
1205 | while (glyph < end) | |
1206 | { | |
1207 | int c = glyph->u.ch; | |
1208 | int face_id = glyph->face_id; | |
daf01701 | 1209 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1210 | c -= SPACEGLYPH; |
1211 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1212 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1213 | ++glyph; | |
1214 | } | |
5f5c8ee5 | 1215 | |
4cecaab8 MB |
1216 | if (hash == 0) |
1217 | hash = 1; | |
5f5c8ee5 GM |
1218 | } |
1219 | ||
1220 | return hash; | |
1221 | } | |
1222 | ||
1223 | ||
153a073c | 1224 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1225 | the number of characters in the line. If must_write_spaces is |
1226 | zero, leading and trailing spaces are ignored. */ | |
1227 | ||
dfd153ae | 1228 | static int |
971de7fb | 1229 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1230 | { |
1231 | struct glyph_row *row = matrix->rows + vpos; | |
1232 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1233 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1234 | int len; | |
1235 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1236 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1237 | |
1238 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1239 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1240 | { |
1241 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1242 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1243 | --end; |
1244 | ||
177c0ea7 | 1245 | /* All blank line. */ |
5f5c8ee5 GM |
1246 | if (end == beg) |
1247 | return 0; | |
1248 | ||
1249 | /* Skip over leading spaces. */ | |
1250 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1251 | ++beg; | |
1252 | } | |
1253 | ||
1254 | /* If we don't have a glyph-table, each glyph is one character, | |
1255 | so return the number of glyphs. */ | |
1256 | if (glyph_table_base == 0) | |
1257 | len = end - beg; | |
1258 | else | |
1259 | { | |
1260 | /* Otherwise, scan the glyphs and accumulate their total length | |
1261 | in LEN. */ | |
1262 | len = 0; | |
1263 | while (beg < end) | |
1264 | { | |
3fc809e2 | 1265 | GLYPH g; |
177c0ea7 | 1266 | |
3fc809e2 KS |
1267 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1268 | ||
565b39a8 | 1269 | if (GLYPH_INVALID_P (g) |
42186983 | 1270 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1271 | len += 1; |
1272 | else | |
1273 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1274 | |
5f5c8ee5 GM |
1275 | ++beg; |
1276 | } | |
1277 | } | |
177c0ea7 | 1278 | |
5f5c8ee5 GM |
1279 | return len; |
1280 | } | |
1281 | ||
1282 | ||
1283 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1284 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1285 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1286 | |
55d4c1b2 | 1287 | static inline int |
6b1f9ba4 | 1288 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 | 1289 | { |
a54e2c05 DA |
1290 | eassert (verify_row_hash (a)); |
1291 | eassert (verify_row_hash (b)); | |
7a7270dd | 1292 | |
5f5c8ee5 GM |
1293 | if (a == b) |
1294 | return 1; | |
1295 | else if (a->hash != b->hash) | |
1296 | return 0; | |
1297 | else | |
1298 | { | |
1299 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1300 | int area; | |
1301 | ||
e4e0bee9 GM |
1302 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1303 | return 0; | |
1304 | ||
5f5c8ee5 GM |
1305 | /* Compare glyphs. */ |
1306 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1307 | { | |
1308 | if (a->used[area] != b->used[area]) | |
1309 | return 0; | |
177c0ea7 | 1310 | |
5f5c8ee5 GM |
1311 | a_glyph = a->glyphs[area]; |
1312 | a_end = a_glyph + a->used[area]; | |
1313 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1314 | |
5f5c8ee5 GM |
1315 | while (a_glyph < a_end |
1316 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1317 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1318 | |
5f5c8ee5 GM |
1319 | if (a_glyph != a_end) |
1320 | return 0; | |
1321 | } | |
1322 | ||
6b61353c KH |
1323 | if (a->fill_line_p != b->fill_line_p |
1324 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1325 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1326 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1327 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1328 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1329 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1330 | || a->right_fringe_offset != b->right_fringe_offset |
1331 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1332 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1333 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1334 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1335 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1336 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1337 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1338 | /* Different partially visible characters on left margin. */ |
1339 | || a->x != b->x | |
1340 | /* Different height. */ | |
1341 | || a->ascent != b->ascent | |
408f5064 GM |
1342 | || a->phys_ascent != b->phys_ascent |
1343 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1344 | || a->visible_height != b->visible_height) |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | return 1; | |
1349 | } | |
1350 | ||
1351 | ||
1352 | \f | |
1353 | /*********************************************************************** | |
1354 | Glyph Pool | |
1355 | ||
1356 | See dispextern.h for an overall explanation of glyph pools. | |
1357 | ***********************************************************************/ | |
1358 | ||
1359 | /* Allocate a glyph_pool structure. The structure returned is | |
1360 | initialized with zeros. The global variable glyph_pool_count is | |
1361 | incremented for each pool allocated. */ | |
1362 | ||
1363 | static struct glyph_pool * | |
971de7fb | 1364 | new_glyph_pool (void) |
5f5c8ee5 | 1365 | { |
23f86fce | 1366 | struct glyph_pool *result = xzalloc (sizeof *result); |
177c0ea7 | 1367 | |
5f5c8ee5 GM |
1368 | /* For memory leak and double deletion checking. */ |
1369 | ++glyph_pool_count; | |
177c0ea7 | 1370 | |
5f5c8ee5 GM |
1371 | return result; |
1372 | } | |
1373 | ||
1374 | ||
1375 | /* Free a glyph_pool structure POOL. The function may be called with | |
1376 | a null POOL pointer. The global variable glyph_pool_count is | |
1377 | decremented with every pool structure freed. If this count gets | |
1378 | negative, more structures were freed than allocated, i.e. one | |
1379 | structure must have been freed more than once or a bogus pointer | |
1380 | was passed to free_glyph_pool. */ | |
1381 | ||
1382 | static void | |
971de7fb | 1383 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1384 | { |
1385 | if (pool) | |
1386 | { | |
153a073c | 1387 | /* More freed than allocated? */ |
5f5c8ee5 | 1388 | --glyph_pool_count; |
a54e2c05 | 1389 | eassert (glyph_pool_count >= 0); |
5f5c8ee5 GM |
1390 | |
1391 | xfree (pool->glyphs); | |
1392 | xfree (pool); | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | ||
1397 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1398 | columns we need. This function never shrinks a pool. The only | |
1399 | case in which this would make sense, would be when a frame's size | |
1400 | is changed from a large value to a smaller one. But, if someone | |
1401 | does it once, we can expect that he will do it again. | |
1402 | ||
1403 | Value is non-zero if the pool changed in a way which makes | |
1404 | re-adjusting window glyph matrices necessary. */ | |
1405 | ||
1406 | static int | |
971de7fb | 1407 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1408 | { |
ca9ce8f2 | 1409 | ptrdiff_t needed; |
5f5c8ee5 GM |
1410 | int changed_p; |
1411 | ||
1412 | changed_p = (pool->glyphs == 0 | |
1413 | || matrix_dim.height != pool->nrows | |
1414 | || matrix_dim.width != pool->ncolumns); | |
1415 | ||
1416 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1417 | needed = matrix_dim.width; |
0065d054 PE |
1418 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1419 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1420 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1421 | if (needed > pool->nglyphs) |
1422 | { | |
0065d054 PE |
1423 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1424 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1425 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1426 | memset (pool->glyphs + old_nglyphs, 0, | |
1427 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1428 | } |
1429 | ||
153a073c | 1430 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1431 | to do sanity checks, and (b) the number of columns determines |
1432 | where rows in the frame matrix start---this must be available to | |
1433 | determine pointers to rows of window sub-matrices. */ | |
1434 | pool->nrows = matrix_dim.height; | |
1435 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1436 | |
5f5c8ee5 GM |
1437 | return changed_p; |
1438 | } | |
1439 | ||
1440 | ||
1441 | \f | |
1442 | /*********************************************************************** | |
1443 | Debug Code | |
1444 | ***********************************************************************/ | |
1445 | ||
e509cfa6 | 1446 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 1447 | |
a13396c9 | 1448 | |
28d440ab KL |
1449 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1450 | XXX Maybe this should be changed to flush the current terminal instead of | |
1451 | stdout. | |
1452 | */ | |
a13396c9 | 1453 | |
85fece3e PE |
1454 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1455 | ||
a13396c9 | 1456 | void |
59fc5cf9 | 1457 | flush_stdout (void) |
a13396c9 GM |
1458 | { |
1459 | fflush (stdout); | |
1460 | } | |
1461 | ||
1462 | ||
5f5c8ee5 GM |
1463 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1464 | pointer has been lost, e.g. by using a structure assignment between | |
1465 | rows, at least one pointer must occur more than once in the rows of | |
1466 | MATRIX. */ | |
1467 | ||
1468 | void | |
59fc5cf9 | 1469 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1470 | { |
1471 | int i, j; | |
177c0ea7 | 1472 | |
5f5c8ee5 GM |
1473 | for (i = 0; i < matrix->nrows; ++i) |
1474 | for (j = 0; j < matrix->nrows; ++j) | |
a54e2c05 | 1475 | eassert (i == j |
5f5c8ee5 GM |
1476 | || (matrix->rows[i].glyphs[TEXT_AREA] |
1477 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1478 | } | |
1479 | ||
1480 | ||
1481 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1482 | ||
1483 | struct glyph_row * | |
59fc5cf9 | 1484 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 | 1485 | { |
a54e2c05 DA |
1486 | eassert (matrix && matrix->rows); |
1487 | eassert (row >= 0 && row < matrix->nrows); | |
5f5c8ee5 GM |
1488 | |
1489 | /* That's really too slow for normal testing because this function | |
1490 | is called almost everywhere. Although---it's still astonishingly | |
1491 | fast, so it is valuable to have for debugging purposes. */ | |
1492 | #if 0 | |
1493 | check_matrix_pointer_lossage (matrix); | |
1494 | #endif | |
177c0ea7 | 1495 | |
5f5c8ee5 GM |
1496 | return matrix->rows + row; |
1497 | } | |
1498 | ||
1499 | ||
1500 | #if 0 /* This function makes invalid assumptions when text is | |
1501 | partially invisible. But it might come handy for debugging | |
1502 | nevertheless. */ | |
1503 | ||
1504 | /* Check invariants that must hold for an up to date current matrix of | |
1505 | window W. */ | |
1506 | ||
1507 | static void | |
59fc5cf9 | 1508 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1509 | { |
1510 | struct glyph_matrix *matrix = w->current_matrix; | |
1511 | int yb = window_text_bottom_y (w); | |
1512 | struct glyph_row *row = matrix->rows; | |
1513 | struct glyph_row *last_text_row = NULL; | |
1514 | struct buffer *saved = current_buffer; | |
1515 | struct buffer *buffer = XBUFFER (w->buffer); | |
1516 | int c; | |
177c0ea7 | 1517 | |
5f5c8ee5 GM |
1518 | /* This can sometimes happen for a fresh window. */ |
1519 | if (matrix->nrows < 2) | |
1520 | return; | |
1521 | ||
1522 | set_buffer_temp (buffer); | |
1523 | ||
1524 | /* Note: last row is always reserved for the mode line. */ | |
1525 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1526 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1527 | { | |
1528 | struct glyph_row *next = row + 1; | |
1529 | ||
1530 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1531 | last_text_row = row; | |
1532 | ||
1533 | /* Check that character and byte positions are in sync. */ | |
a54e2c05 | 1534 | eassert (MATRIX_ROW_START_BYTEPOS (row) |
5f5c8ee5 | 1535 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); |
a54e2c05 | 1536 | eassert (BYTEPOS (row->start.pos) |
d36fe237 | 1537 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); |
5f5c8ee5 GM |
1538 | |
1539 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1540 | have such a position temporarily in case of a minibuffer | |
1541 | displaying something like `[Sole completion]' at its end. */ | |
1542 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 | 1543 | { |
a54e2c05 | 1544 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
d36fe237 | 1545 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); |
a54e2c05 | 1546 | eassert (BYTEPOS (row->end.pos) |
d36fe237 EZ |
1547 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); |
1548 | } | |
5f5c8ee5 GM |
1549 | |
1550 | /* Check that end position of `row' is equal to start position | |
1551 | of next row. */ | |
1552 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1553 | { | |
a54e2c05 | 1554 | eassert (MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 | 1555 | == MATRIX_ROW_START_CHARPOS (next)); |
a54e2c05 | 1556 | eassert (MATRIX_ROW_END_BYTEPOS (row) |
5f5c8ee5 | 1557 | == MATRIX_ROW_START_BYTEPOS (next)); |
a54e2c05 DA |
1558 | eassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1559 | eassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1560 | } |
1561 | row = next; | |
1562 | } | |
1563 | ||
a54e2c05 DA |
1564 | eassert (w->current_matrix->nrows == w->desired_matrix->nrows); |
1565 | eassert (w->desired_matrix->rows != NULL); | |
5f5c8ee5 GM |
1566 | set_buffer_temp (saved); |
1567 | } | |
1568 | ||
1569 | #endif /* 0 */ | |
1570 | ||
e509cfa6 | 1571 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
1572 | |
1573 | ||
1574 | \f | |
1575 | /********************************************************************** | |
1576 | Allocating/ Adjusting Glyph Matrices | |
1577 | **********************************************************************/ | |
1578 | ||
1579 | /* Allocate glyph matrices over a window tree for a frame-based | |
1580 | redisplay | |
1581 | ||
1582 | X and Y are column/row within the frame glyph matrix where | |
1583 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1584 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1585 | function is only interested in the result matrix dimension, and | |
1586 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1587 | |
1588 | The function returns the total width/height of the sub-matrices of | |
1589 | the window tree. If called on a frame root window, the computation | |
1590 | will take the mini-buffer window into account. | |
1591 | ||
1592 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1593 | ||
1594 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1595 | glyph matrices yet, and | |
1596 | ||
1597 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1598 | any window in the tree will be changed or have been changed (see | |
153a073c | 1599 | DIM_ONLY_P) |
5f5c8ee5 GM |
1600 | |
1601 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1602 | function. | |
1603 | ||
1604 | Windows are arranged into chains of windows on the same level | |
1605 | through the next fields of window structures. Such a level can be | |
1606 | either a sequence of horizontally adjacent windows from left to | |
1607 | right, or a sequence of vertically adjacent windows from top to | |
1608 | bottom. Each window in a horizontal sequence can be either a leaf | |
1609 | window or a vertical sequence; a window in a vertical sequence can | |
1610 | be either a leaf or a horizontal sequence. All windows in a | |
1611 | horizontal sequence have the same height, and all windows in a | |
1612 | vertical sequence have the same width. | |
1613 | ||
1614 | This function uses, for historical reasons, a more general | |
1615 | algorithm to determine glyph matrix dimensions that would be | |
1616 | necessary. | |
1617 | ||
1618 | The matrix height of a horizontal sequence is determined by the | |
1619 | maximum height of any matrix in the sequence. The matrix width of | |
1620 | a horizontal sequence is computed by adding up matrix widths of | |
1621 | windows in the sequence. | |
1622 | ||
1623 | |<------- result width ------->| | |
1624 | +---------+----------+---------+ --- | |
1625 | | | | | | | |
1626 | | | | | | |
1627 | +---------+ | | result height | |
1628 | | +---------+ | |
1629 | | | | | |
1630 | +----------+ --- | |
1631 | ||
1632 | The matrix width of a vertical sequence is the maximum matrix width | |
1633 | of any window in the sequence. Its height is computed by adding up | |
1634 | matrix heights of windows in the sequence. | |
1635 | ||
1636 | |<---- result width -->| | |
1637 | +---------+ --- | |
1638 | | | | | |
1639 | | | | | |
1640 | +---------+--+ | | |
1641 | | | | | |
1642 | | | result height | |
1643 | | | | |
1644 | +------------+---------+ | | |
1645 | | | | | |
1646 | | | | | |
1647 | +------------+---------+ --- */ | |
1648 | ||
1649 | /* Bit indicating that a new matrix will be allocated or has been | |
1650 | allocated. */ | |
1651 | ||
1652 | #define NEW_LEAF_MATRIX (1 << 0) | |
1653 | ||
1654 | /* Bit indicating that a matrix will or has changed its location or | |
1655 | size. */ | |
1656 | ||
1657 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1658 | ||
1659 | static struct dim | |
6f704c76 DN |
1660 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1661 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1662 | { |
1663 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1664 | int x0 = x, y0 = y; | |
1665 | int wmax = 0, hmax = 0; | |
1666 | struct dim total; | |
1667 | struct dim dim; | |
1668 | struct window *w; | |
1669 | int in_horz_combination_p; | |
1670 | ||
1671 | /* What combination is WINDOW part of? Compute this once since the | |
1672 | result is the same for all windows in the `next' chain. The | |
1673 | special case of a root window (parent equal to nil) is treated | |
1674 | like a vertical combination because a root window's `next' | |
1675 | points to the mini-buffer window, if any, which is arranged | |
1676 | vertically below other windows. */ | |
1677 | in_horz_combination_p | |
1678 | = (!NILP (XWINDOW (window)->parent) | |
1679 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1680 | ||
1681 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1682 | do |
5f5c8ee5 GM |
1683 | { |
1684 | w = XWINDOW (window); | |
1685 | ||
1686 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1687 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1688 | if (!NILP (w->hchild)) |
177c0ea7 | 1689 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1690 | dim_only_p, |
1691 | window_change_flags); | |
1692 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1693 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1694 | dim_only_p, |
1695 | window_change_flags); | |
1696 | else | |
1697 | { | |
1698 | /* If not already done, allocate sub-matrix structures. */ | |
1699 | if (w->desired_matrix == NULL) | |
1700 | { | |
1701 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1702 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1703 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1704 | } | |
177c0ea7 | 1705 | |
5f5c8ee5 GM |
1706 | /* Width and height MUST be chosen so that there are no |
1707 | holes in the frame matrix. */ | |
5d3cc43c GM |
1708 | dim.width = required_matrix_width (w); |
1709 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1710 | |
1711 | /* Will matrix be re-allocated? */ | |
1712 | if (x != w->desired_matrix->matrix_x | |
1713 | || y != w->desired_matrix->matrix_y | |
1714 | || dim.width != w->desired_matrix->matrix_w | |
1715 | || dim.height != w->desired_matrix->matrix_h | |
1716 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1717 | w->left_margin_cols) |
5f5c8ee5 GM |
1718 | != w->desired_matrix->left_margin_glyphs) |
1719 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1720 | w->right_margin_cols) |
5f5c8ee5 GM |
1721 | != w->desired_matrix->right_margin_glyphs)) |
1722 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1723 | ||
1724 | /* Actually change matrices, if allowed. Do not consider | |
1725 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1726 | may have been changed which we don't now here. We trust | |
1727 | that we only will be called with DIM_ONLY_P != 0 when | |
1728 | necessary. */ | |
1729 | if (!dim_only_p) | |
1730 | { | |
1731 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1732 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | /* If we are part of a horizontal combination, advance x for | |
1737 | windows to the right of W; otherwise advance y for windows | |
1738 | below W. */ | |
1739 | if (in_horz_combination_p) | |
1740 | x += dim.width; | |
177c0ea7 | 1741 | else |
5f5c8ee5 GM |
1742 | y += dim.height; |
1743 | ||
1744 | /* Remember maximum glyph matrix dimensions. */ | |
1745 | wmax = max (wmax, dim.width); | |
1746 | hmax = max (hmax, dim.height); | |
1747 | ||
1748 | /* Next window on same level. */ | |
1749 | window = w->next; | |
1750 | } | |
1751 | while (!NILP (window)); | |
1752 | ||
1753 | /* Set `total' to the total glyph matrix dimension of this window | |
1754 | level. In a vertical combination, the width is the width of the | |
1755 | widest window; the height is the y we finally reached, corrected | |
1756 | by the y we started with. In a horizontal combination, the total | |
1757 | height is the height of the tallest window, and the width is the | |
1758 | x we finally reached, corrected by the x we started with. */ | |
1759 | if (in_horz_combination_p) | |
1760 | { | |
1761 | total.width = x - x0; | |
1762 | total.height = hmax; | |
1763 | } | |
177c0ea7 | 1764 | else |
5f5c8ee5 GM |
1765 | { |
1766 | total.width = wmax; | |
1767 | total.height = y - y0; | |
1768 | } | |
1769 | ||
1770 | return total; | |
1771 | } | |
1772 | ||
1773 | ||
5d3cc43c GM |
1774 | /* Return the required height of glyph matrices for window W. */ |
1775 | ||
2f7c71a1 | 1776 | static int |
971de7fb | 1777 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1778 | { |
1779 | #ifdef HAVE_WINDOW_SYSTEM | |
1780 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1781 | |
5d3cc43c GM |
1782 | if (FRAME_WINDOW_P (f)) |
1783 | { | |
1784 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1785 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1786 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1787 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1788 | /* One partially visible line at the top and |
1789 | bottom of the window. */ | |
1790 | + 2 | |
153a073c | 1791 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1792 | + 2); |
1793 | } | |
1794 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1795 | |
7df02016 | 1796 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1797 | } |
1798 | ||
1799 | ||
1800 | /* Return the required width of glyph matrices for window W. */ | |
1801 | ||
2f7c71a1 | 1802 | static int |
971de7fb | 1803 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1804 | { |
1805 | #ifdef HAVE_WINDOW_SYSTEM | |
1806 | struct frame *f = XFRAME (w->frame); | |
1807 | if (FRAME_WINDOW_P (f)) | |
1808 | { | |
1809 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1810 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1811 | |
5d3cc43c GM |
1812 | /* Compute number of glyphs needed in a glyph row. */ |
1813 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1814 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1815 | /* 2 partially visible columns in the text area. */ |
1816 | + 2 | |
1817 | /* One partially visible column at the right | |
1818 | edge of each marginal area. */ | |
1819 | + 1 + 1); | |
1820 | } | |
1821 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1822 | ||
7df02016 | 1823 | return XINT (w->total_cols); |
5d3cc43c GM |
1824 | } |
1825 | ||
1826 | ||
5f5c8ee5 | 1827 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1828 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1829 | |
5f5c8ee5 | 1830 | static void |
971de7fb | 1831 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1832 | { |
5f5c8ee5 GM |
1833 | while (w) |
1834 | { | |
1835 | if (!NILP (w->vchild)) | |
5d3cc43c | 1836 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1837 | else if (!NILP (w->hchild)) |
5d3cc43c | 1838 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1839 | else |
1840 | { | |
1841 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1842 | struct dim dim; |
1843 | ||
1844 | /* If matrices are not yet allocated, allocate them now. */ | |
1845 | if (w->desired_matrix == NULL) | |
1846 | { | |
1847 | w->desired_matrix = new_glyph_matrix (NULL); | |
1848 | w->current_matrix = new_glyph_matrix (NULL); | |
1849 | } | |
1850 | ||
5d3cc43c GM |
1851 | dim.width = required_matrix_width (w); |
1852 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1853 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1854 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1855 | } | |
177c0ea7 | 1856 | |
5f5c8ee5 GM |
1857 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1858 | } | |
1859 | } | |
1860 | ||
1861 | ||
1862 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1863 | do it for all frames; otherwise do it just for the given frame. | |
1864 | This function must be called when a new frame is created, its size | |
1865 | changes, or its window configuration changes. */ | |
1866 | ||
1867 | void | |
971de7fb | 1868 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1869 | { |
408f5064 GM |
1870 | /* Block input so that expose events and other events that access |
1871 | glyph matrices are not processed while we are changing them. */ | |
1872 | BLOCK_INPUT; | |
1873 | ||
5f5c8ee5 GM |
1874 | if (f) |
1875 | adjust_frame_glyphs (f); | |
1876 | else | |
1877 | { | |
1878 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1879 | |
5f5c8ee5 GM |
1880 | FOR_EACH_FRAME (tail, lisp_frame) |
1881 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1882 | } | |
408f5064 GM |
1883 | |
1884 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1885 | } |
1886 | ||
1887 | ||
1888 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1889 | |
1890 | To be called from init_display. | |
1891 | ||
5f5c8ee5 GM |
1892 | We need a glyph matrix because redraw will happen soon. |
1893 | Unfortunately, window sizes on selected_frame are not yet set to | |
1894 | meaningful values. I believe we can assume that there are only two | |
1895 | windows on the frame---the mini-buffer and the root window. Frame | |
1896 | height and width seem to be correct so far. So, set the sizes of | |
1897 | windows to estimated values. */ | |
1898 | ||
1899 | static void | |
971de7fb | 1900 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1901 | { |
91fb7e1b GM |
1902 | struct frame *sf = SELECTED_FRAME (); |
1903 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1904 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1905 | int frame_lines = FRAME_LINES (sf); |
1906 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1907 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1908 | |
1909 | /* Do it for the root window. */ | |
7df02016 | 1910 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1911 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1912 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1913 | |
1914 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1915 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1916 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1917 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 1918 | |
91fb7e1b | 1919 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1920 | glyphs_initialized_initially_p = 1; |
1921 | } | |
177c0ea7 | 1922 | |
5f5c8ee5 GM |
1923 | |
1924 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1925 | ||
1926 | static void | |
971de7fb | 1927 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1928 | { |
1929 | if (FRAME_WINDOW_P (f)) | |
1930 | adjust_frame_glyphs_for_window_redisplay (f); | |
1931 | else | |
1932 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1933 | |
5f5c8ee5 GM |
1934 | /* Don't forget the message buffer and the buffer for |
1935 | decode_mode_spec. */ | |
1936 | adjust_frame_message_buffer (f); | |
1937 | adjust_decode_mode_spec_buffer (f); | |
1938 | ||
1939 | f->glyphs_initialized_p = 1; | |
1940 | } | |
1941 | ||
075757cc CY |
1942 | /* Return 1 if any window in the tree has nonzero window margins. See |
1943 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1944 | static int | |
971de7fb | 1945 | showing_window_margins_p (struct window *w) |
075757cc CY |
1946 | { |
1947 | while (w) | |
1948 | { | |
1949 | if (!NILP (w->hchild)) | |
1950 | { | |
1951 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1952 | return 1; | |
1953 | } | |
1954 | else if (!NILP (w->vchild)) | |
1955 | { | |
1956 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1957 | return 1; | |
1958 | } | |
1959 | else if (!NILP (w->left_margin_cols) | |
1960 | || !NILP (w->right_margin_cols)) | |
1961 | return 1; | |
3fc809e2 | 1962 | |
075757cc CY |
1963 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1964 | } | |
1965 | return 0; | |
1966 | } | |
1967 | ||
5f5c8ee5 | 1968 | |
c9f00270 GM |
1969 | /* In the window tree with root W, build current matrices of leaf |
1970 | windows from the frame's current matrix. */ | |
1971 | ||
1972 | static void | |
971de7fb | 1973 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1974 | { |
1975 | struct window *w; | |
177c0ea7 | 1976 | |
c9f00270 GM |
1977 | for (; !NILP (window); window = w->next) |
1978 | { | |
1979 | w = XWINDOW (window); | |
177c0ea7 | 1980 | |
c9f00270 GM |
1981 | if (!NILP (w->hchild)) |
1982 | fake_current_matrices (w->hchild); | |
1983 | else if (!NILP (w->vchild)) | |
1984 | fake_current_matrices (w->vchild); | |
1985 | else | |
1986 | { | |
1987 | int i; | |
1988 | struct frame *f = XFRAME (w->frame); | |
1989 | struct glyph_matrix *m = w->current_matrix; | |
1990 | struct glyph_matrix *fm = f->current_matrix; | |
1991 | ||
a54e2c05 DA |
1992 | eassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
1993 | eassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 1994 | |
c9f00270 GM |
1995 | for (i = 0; i < m->matrix_h; ++i) |
1996 | { | |
1997 | struct glyph_row *r = m->rows + i; | |
7df02016 | 1998 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 | 1999 | |
a54e2c05 | 2000 | eassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] |
c9f00270 GM |
2001 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); |
2002 | ||
2003 | r->enabled_p = fr->enabled_p; | |
2004 | if (r->enabled_p) | |
2005 | { | |
2006 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2007 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2008 | r->used[TEXT_AREA] = (m->matrix_w | |
2009 | - r->used[LEFT_MARGIN_AREA] | |
2010 | - r->used[RIGHT_MARGIN_AREA]); | |
2011 | r->mode_line_p = 0; | |
c9f00270 GM |
2012 | } |
2013 | } | |
2014 | } | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | ||
bccee4f2 | 2019 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2020 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2021 | |
bccee4f2 | 2022 | static struct glyph_matrix * |
971de7fb | 2023 | save_current_matrix (struct frame *f) |
c9f00270 | 2024 | { |
bccee4f2 GM |
2025 | int i; |
2026 | struct glyph_matrix *saved; | |
e797dea6 | 2027 | |
23f86fce | 2028 | saved = xzalloc (sizeof *saved); |
bccee4f2 | 2029 | saved->nrows = f->current_matrix->nrows; |
23f86fce | 2030 | saved->rows = xzalloc (saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2031 | |
2032 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2033 | { |
bccee4f2 GM |
2034 | struct glyph_row *from = f->current_matrix->rows + i; |
2035 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2036 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
23f86fce | 2037 | to->glyphs[TEXT_AREA] = xmalloc (nbytes); |
72af86bd | 2038 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2039 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2040 | } |
bccee4f2 GM |
2041 | |
2042 | return saved; | |
2043 | } | |
2044 | ||
2045 | ||
2046 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2047 | and free memory associated with SAVED. */ | |
2048 | ||
2049 | static void | |
971de7fb | 2050 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2051 | { |
2052 | int i; | |
2053 | ||
2054 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2055 | { |
bccee4f2 GM |
2056 | struct glyph_row *from = saved->rows + i; |
2057 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2058 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2059 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2060 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2061 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2062 | } |
177c0ea7 | 2063 | |
bccee4f2 GM |
2064 | xfree (saved->rows); |
2065 | xfree (saved); | |
c9f00270 GM |
2066 | } |
2067 | ||
2068 | ||
bccee4f2 | 2069 | |
5f5c8ee5 GM |
2070 | /* Allocate/reallocate glyph matrices of a single frame F for |
2071 | frame-based redisplay. */ | |
2072 | ||
2073 | static void | |
971de7fb | 2074 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2075 | { |
5f5c8ee5 GM |
2076 | struct dim matrix_dim; |
2077 | int pool_changed_p; | |
2078 | int window_change_flags; | |
2079 | int top_window_y; | |
2080 | ||
2081 | if (!FRAME_LIVE_P (f)) | |
2082 | return; | |
2083 | ||
5f5c8ee5 GM |
2084 | top_window_y = FRAME_TOP_MARGIN (f); |
2085 | ||
2086 | /* Allocate glyph pool structures if not already done. */ | |
2087 | if (f->desired_pool == NULL) | |
2088 | { | |
2089 | f->desired_pool = new_glyph_pool (); | |
2090 | f->current_pool = new_glyph_pool (); | |
2091 | } | |
2092 | ||
2093 | /* Allocate frames matrix structures if needed. */ | |
2094 | if (f->desired_matrix == NULL) | |
2095 | { | |
2096 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2097 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2098 | } | |
177c0ea7 | 2099 | |
5f5c8ee5 GM |
2100 | /* Compute window glyph matrices. (This takes the mini-buffer |
2101 | window into account). The result is the size of the frame glyph | |
2102 | matrix needed. The variable window_change_flags is set to a bit | |
2103 | mask indicating whether new matrices will be allocated or | |
2104 | existing matrices change their size or location within the frame | |
2105 | matrix. */ | |
2106 | window_change_flags = 0; | |
2107 | matrix_dim | |
2108 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2109 | 0, top_window_y, | |
5d3cc43c | 2110 | 1, |
5f5c8ee5 GM |
2111 | &window_change_flags); |
2112 | ||
2113 | /* Add in menu bar lines, if any. */ | |
2114 | matrix_dim.height += top_window_y; | |
2115 | ||
2116 | /* Enlarge pools as necessary. */ | |
2117 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2118 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2119 | ||
177c0ea7 | 2120 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2121 | absolutely necessary since it requires a frame redraw. */ |
2122 | if (pool_changed_p || window_change_flags) | |
2123 | { | |
2124 | /* Do it for window matrices. */ | |
2125 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2126 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2127 | &window_change_flags); |
2128 | ||
2129 | /* Size of frame matrices must equal size of frame. Note | |
2130 | that we are called for X frames with window widths NOT equal | |
2131 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
a54e2c05 | 2132 | eassert (matrix_dim.width == FRAME_COLS (f) |
7df02016 | 2133 | && matrix_dim.height == FRAME_LINES (f)); |
177c0ea7 | 2134 | |
e797dea6 GM |
2135 | /* Pointers to glyph memory in glyph rows are exchanged during |
2136 | the update phase of redisplay, which means in general that a | |
2137 | frame's current matrix consists of pointers into both the | |
2138 | desired and current glyph pool of the frame. Adjusting a | |
2139 | matrix sets the frame matrix up so that pointers are all into | |
2140 | the same pool. If we want to preserve glyph contents of the | |
2141 | current matrix over a call to adjust_glyph_matrix, we must | |
2142 | make a copy of the current glyphs, and restore the current | |
2143 | matrix' contents from that copy. */ | |
2144 | if (display_completed | |
2145 | && !FRAME_GARBAGED_P (f) | |
2146 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2147 | && matrix_dim.height == f->current_matrix->matrix_h |
2148 | /* For some reason, the frame glyph matrix gets corrupted if | |
2149 | any of the windows contain margins. I haven't been able | |
2150 | to hunt down the reason, but for the moment this prevents | |
2151 | the problem from manifesting. -- cyd */ | |
d5c20fe8 | 2152 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) |
e797dea6 | 2153 | { |
bccee4f2 GM |
2154 | struct glyph_matrix *copy = save_current_matrix (f); |
2155 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2156 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2157 | restore_current_matrix (f, copy); |
e797dea6 GM |
2158 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2159 | } | |
c9f00270 | 2160 | else |
e797dea6 | 2161 | { |
bccee4f2 | 2162 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2163 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2164 | SET_FRAME_GARBAGED (f); | |
2165 | } | |
5f5c8ee5 GM |
2166 | } |
2167 | } | |
2168 | ||
2169 | ||
2170 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2171 | window-based redisplay. */ | |
2172 | ||
2173 | static void | |
971de7fb | 2174 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2175 | { |
a54e2c05 | 2176 | eassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2177 | |
5f5c8ee5 | 2178 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2179 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2180 | |
8ce2650d | 2181 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2182 | /* Allocate/ reallocate matrices of the dummy window used to display |
2183 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2184 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2185 | { |
2186 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2187 | struct window *w; |
5f5c8ee5 GM |
2188 | if (NILP (f->menu_bar_window)) |
2189 | { | |
2190 | f->menu_bar_window = make_window (); | |
2191 | w = XWINDOW (f->menu_bar_window); | |
2192 | XSETFRAME (w->frame, f); | |
2193 | w->pseudo_window_p = 1; | |
2194 | } | |
2195 | else | |
2196 | w = XWINDOW (f->menu_bar_window); | |
2197 | ||
2198 | /* Set window dimensions to frame dimensions and allocate or | |
2199 | adjust glyph matrices of W. */ | |
7df02016 KS |
2200 | XSETFASTINT (w->top_line, 0); |
2201 | XSETFASTINT (w->left_col, 0); | |
2202 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2203 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2204 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2205 | } |
57714a86 YM |
2206 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2207 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2208 | |
488dd4c4 | 2209 | #ifndef USE_GTK |
d2d37ddc PE |
2210 | { |
2211 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2212 | don't have a tool bar window yet, make one. */ | |
2213 | struct window *w; | |
2214 | if (NILP (f->tool_bar_window)) | |
2215 | { | |
2216 | f->tool_bar_window = make_window (); | |
2217 | w = XWINDOW (f->tool_bar_window); | |
2218 | XSETFRAME (w->frame, f); | |
2219 | w->pseudo_window_p = 1; | |
2220 | } | |
2221 | else | |
9ea173e8 | 2222 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2223 | |
d2d37ddc PE |
2224 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2225 | XSETFASTINT (w->left_col, 0); | |
2226 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2227 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2228 | allocate_matrices_for_window_redisplay (w); | |
2229 | } | |
488dd4c4 | 2230 | #endif |
5f5c8ee5 GM |
2231 | } |
2232 | ||
2233 | ||
177c0ea7 | 2234 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2235 | |
5f5c8ee5 GM |
2236 | Note that the message buffer is never freed. Since I could not |
2237 | find a free in 19.34, I assume that freeing it would be | |
2238 | problematic in some way and don't do it either. | |
2239 | ||
2240 | (Implementation note: It should be checked if we can free it | |
2241 | eventually without causing trouble). */ | |
2242 | ||
2243 | static void | |
971de7fb | 2244 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2245 | { |
dfd153ae | 2246 | ptrdiff_t size = FRAME_MESSAGE_BUF_SIZE (f) + 1; |
5f5c8ee5 GM |
2247 | |
2248 | if (FRAME_MESSAGE_BUF (f)) | |
2249 | { | |
2250 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2251 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2252 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2253 | } | |
2254 | else | |
23f86fce | 2255 | FRAME_MESSAGE_BUF (f) = xmalloc (size); |
5f5c8ee5 GM |
2256 | } |
2257 | ||
2258 | ||
2259 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2260 | ||
2261 | static void | |
971de7fb | 2262 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2263 | { |
2264 | f->decode_mode_spec_buffer | |
2265 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2266 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2267 | } | |
2268 | ||
2269 | ||
2270 | \f | |
2271 | /********************************************************************** | |
2272 | Freeing Glyph Matrices | |
2273 | **********************************************************************/ | |
2274 | ||
2275 | /* Free glyph memory for a frame F. F may be null. This function can | |
2276 | be called for the same frame more than once. The root window of | |
2277 | F may be nil when this function is called. This is the case when | |
2278 | the function is called when F is destroyed. */ | |
2279 | ||
2280 | void | |
971de7fb | 2281 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2282 | { |
2283 | if (f && f->glyphs_initialized_p) | |
2284 | { | |
42f55fe0 GM |
2285 | /* Block interrupt input so that we don't get surprised by an X |
2286 | event while we're in an inconsistent state. */ | |
2287 | BLOCK_INPUT; | |
5f5c8ee5 | 2288 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2289 | |
5f5c8ee5 GM |
2290 | /* Release window sub-matrices. */ |
2291 | if (!NILP (f->root_window)) | |
2292 | free_window_matrices (XWINDOW (f->root_window)); | |
2293 | ||
2294 | /* Free the dummy window for menu bars without X toolkit and its | |
2295 | glyph matrices. */ | |
2296 | if (!NILP (f->menu_bar_window)) | |
2297 | { | |
2298 | struct window *w = XWINDOW (f->menu_bar_window); | |
2299 | free_glyph_matrix (w->desired_matrix); | |
2300 | free_glyph_matrix (w->current_matrix); | |
2301 | w->desired_matrix = w->current_matrix = NULL; | |
2302 | f->menu_bar_window = Qnil; | |
2303 | } | |
2304 | ||
9ea173e8 GM |
2305 | /* Free the tool bar window and its glyph matrices. */ |
2306 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2307 | { |
9ea173e8 | 2308 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2309 | free_glyph_matrix (w->desired_matrix); |
2310 | free_glyph_matrix (w->current_matrix); | |
2311 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2312 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2313 | } |
2314 | ||
2315 | /* Release frame glyph matrices. Reset fields to zero in | |
2316 | case we are called a second time. */ | |
2317 | if (f->desired_matrix) | |
2318 | { | |
2319 | free_glyph_matrix (f->desired_matrix); | |
2320 | free_glyph_matrix (f->current_matrix); | |
2321 | f->desired_matrix = f->current_matrix = NULL; | |
2322 | } | |
2323 | ||
2324 | /* Release glyph pools. */ | |
2325 | if (f->desired_pool) | |
2326 | { | |
2327 | free_glyph_pool (f->desired_pool); | |
2328 | free_glyph_pool (f->current_pool); | |
2329 | f->desired_pool = f->current_pool = NULL; | |
2330 | } | |
177c0ea7 | 2331 | |
42f55fe0 | 2332 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2333 | } |
2334 | } | |
2335 | ||
2336 | ||
2337 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2338 | function may be called with a null pointer, and it may be called on | |
2339 | the same tree more than once. */ | |
2340 | ||
2341 | void | |
971de7fb | 2342 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2343 | { |
2344 | while (w) | |
2345 | { | |
2346 | if (!NILP (w->hchild)) | |
2347 | free_window_matrices (XWINDOW (w->hchild)); | |
2348 | else if (!NILP (w->vchild)) | |
2349 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2350 | else |
5f5c8ee5 GM |
2351 | { |
2352 | /* This is a leaf window. Free its memory and reset fields | |
2353 | to zero in case this function is called a second time for | |
2354 | W. */ | |
2355 | free_glyph_matrix (w->current_matrix); | |
2356 | free_glyph_matrix (w->desired_matrix); | |
2357 | w->current_matrix = w->desired_matrix = NULL; | |
2358 | } | |
2359 | ||
2360 | /* Next window on same level. */ | |
2361 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | ||
2366 | /* Check glyph memory leaks. This function is called from | |
2367 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2368 | exits. We therefore free all glyph memory for all active frames | |
2369 | explicitly and check that nothing is left allocated. */ | |
2370 | ||
2371 | void | |
971de7fb | 2372 | check_glyph_memory (void) |
5f5c8ee5 GM |
2373 | { |
2374 | Lisp_Object tail, frame; | |
2375 | ||
2376 | /* Free glyph memory for all frames. */ | |
2377 | FOR_EACH_FRAME (tail, frame) | |
2378 | free_glyphs (XFRAME (frame)); | |
2379 | ||
2380 | /* Check that nothing is left allocated. */ | |
2381 | if (glyph_matrix_count) | |
2382 | abort (); | |
2383 | if (glyph_pool_count) | |
2384 | abort (); | |
2385 | } | |
2386 | ||
2387 | ||
2388 | \f | |
2389 | /********************************************************************** | |
2390 | Building a Frame Matrix | |
2391 | **********************************************************************/ | |
2392 | ||
2393 | /* Most of the redisplay code works on glyph matrices attached to | |
2394 | windows. This is a good solution most of the time, but it is not | |
2395 | suitable for terminal code. Terminal output functions cannot rely | |
2396 | on being able to set an arbitrary terminal window. Instead they | |
2397 | must be provided with a view of the whole frame, i.e. the whole | |
2398 | screen. We build such a view by constructing a frame matrix from | |
2399 | window matrices in this section. | |
2400 | ||
2401 | Windows that must be updated have their must_be_update_p flag set. | |
2402 | For all such windows, their desired matrix is made part of the | |
2403 | desired frame matrix. For other windows, their current matrix is | |
2404 | made part of the desired frame matrix. | |
2405 | ||
2406 | +-----------------+----------------+ | |
2407 | | desired | desired | | |
2408 | | | | | |
2409 | +-----------------+----------------+ | |
2410 | | current | | |
2411 | | | | |
2412 | +----------------------------------+ | |
2413 | ||
2414 | Desired window matrices can be made part of the frame matrix in a | |
2415 | cheap way: We exploit the fact that the desired frame matrix and | |
2416 | desired window matrices share their glyph memory. This is not | |
2417 | possible for current window matrices. Their glyphs are copied to | |
2418 | the desired frame matrix. The latter is equivalent to | |
2419 | preserve_other_columns in the old redisplay. | |
2420 | ||
2421 | Used glyphs counters for frame matrix rows are the result of adding | |
2422 | up glyph lengths of the window matrices. A line in the frame | |
2423 | matrix is enabled, if a corresponding line in a window matrix is | |
2424 | enabled. | |
177c0ea7 | 2425 | |
5f5c8ee5 GM |
2426 | After building the desired frame matrix, it will be passed to |
2427 | terminal code, which will manipulate both the desired and current | |
2428 | frame matrix. Changes applied to the frame's current matrix have | |
2429 | to be visible in current window matrices afterwards, of course. | |
2430 | ||
2431 | This problem is solved like this: | |
2432 | ||
2433 | 1. Window and frame matrices share glyphs. Window matrices are | |
2434 | constructed in a way that their glyph contents ARE the glyph | |
2435 | contents needed in a frame matrix. Thus, any modification of | |
2436 | glyphs done in terminal code will be reflected in window matrices | |
2437 | automatically. | |
177c0ea7 | 2438 | |
5f5c8ee5 GM |
2439 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2440 | intercepted by hook functions so that corresponding row operations | |
2441 | on window matrices can be performed. This is necessary because we | |
2442 | use pointers to glyphs in glyph row structures. To satisfy the | |
2443 | assumption of point 1 above that glyphs are updated implicitly in | |
2444 | window matrices when they are manipulated via the frame matrix, | |
2445 | window and frame matrix must of course agree where to find the | |
2446 | glyphs for their rows. Possible manipulations that must be | |
2447 | mirrored are assignments of rows of the desired frame matrix to the | |
2448 | current frame matrix and scrolling the current frame matrix. */ | |
2449 | ||
2450 | /* Build frame F's desired matrix from window matrices. Only windows | |
2451 | which have the flag must_be_updated_p set have to be updated. Menu | |
2452 | bar lines of a frame are not covered by window matrices, so make | |
2453 | sure not to touch them in this function. */ | |
2454 | ||
2455 | static void | |
971de7fb | 2456 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2457 | { |
2458 | int i; | |
2459 | ||
2460 | /* F must have a frame matrix when this function is called. */ | |
a54e2c05 | 2461 | eassert (!FRAME_WINDOW_P (f)); |
177c0ea7 | 2462 | |
5f5c8ee5 GM |
2463 | /* Clear all rows in the frame matrix covered by window matrices. |
2464 | Menu bar lines are not covered by windows. */ | |
2465 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2466 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2467 | ||
2468 | /* Build the matrix by walking the window tree. */ | |
2469 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2470 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2471 | } | |
2472 | ||
2473 | ||
2474 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2475 | matrices. W is the root of a window tree. */ | |
2476 | ||
2477 | static void | |
971de7fb | 2478 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2479 | { |
2480 | while (w) | |
2481 | { | |
2482 | if (!NILP (w->hchild)) | |
2483 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2484 | else if (!NILP (w->vchild)) | |
2485 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2486 | else | |
2487 | build_frame_matrix_from_leaf_window (matrix, w); | |
2488 | ||
2489 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2490 | } | |
2491 | } | |
2492 | ||
2493 | ||
2494 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2495 | desired frame matrix built. W is a leaf window whose desired or | |
2496 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2497 | must_be_updated_p determines which matrix it contributes to | |
2498 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2499 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2500 | Adding a desired matrix means setting up used counters and such in | |
2501 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2502 | means copying glyphs. The latter case corresponds to | |
2503 | preserve_other_columns in the old redisplay. */ | |
2504 | ||
2505 | static void | |
971de7fb | 2506 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2507 | { |
2508 | struct glyph_matrix *window_matrix; | |
2509 | int window_y, frame_y; | |
2510 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2511 | GLYPH right_border_glyph; |
2512 | ||
2513 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2514 | |
2515 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2516 | if (w->must_be_updated_p) | |
2517 | { | |
2518 | window_matrix = w->desired_matrix; | |
2519 | ||
2520 | /* Decide whether we want to add a vertical border glyph. */ | |
2521 | if (!WINDOW_RIGHTMOST_P (w)) | |
2522 | { | |
2523 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2524 | Lisp_Object gc; |
b4e49aee | 2525 | |
3fc809e2 KS |
2526 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2527 | if (dp | |
d311d28c | 2528 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc))) |
3fc809e2 KS |
2529 | { |
2530 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2531 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2532 | } | |
b4e49aee | 2533 | |
3fc809e2 KS |
2534 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2535 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2536 | } |
2537 | } | |
2538 | else | |
2539 | window_matrix = w->current_matrix; | |
2540 | ||
2541 | /* For all rows in the window matrix and corresponding rows in the | |
2542 | frame matrix. */ | |
2543 | window_y = 0; | |
2544 | frame_y = window_matrix->matrix_y; | |
2545 | while (window_y < window_matrix->nrows) | |
2546 | { | |
2547 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2548 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2549 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2550 | |
2551 | /* Fill up the frame row with spaces up to the left margin of the | |
2552 | window row. */ | |
2553 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2554 | ||
2555 | /* Fill up areas in the window matrix row with spaces. */ | |
2556 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2557 | |
2558 | /* If only part of W's desired matrix has been built, and | |
2559 | window_row wasn't displayed, use the corresponding current | |
2560 | row instead. */ | |
2561 | if (window_matrix == w->desired_matrix | |
2562 | && !window_row->enabled_p) | |
2563 | { | |
2564 | window_row = w->current_matrix->rows + window_y; | |
2565 | current_row_p = 1; | |
2566 | } | |
177c0ea7 | 2567 | |
2a8bd25f | 2568 | if (current_row_p) |
5f5c8ee5 | 2569 | { |
2a8bd25f | 2570 | /* Copy window row to frame row. */ |
72af86bd AS |
2571 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2572 | window_row->glyphs[0], | |
2573 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2574 | } |
2575 | else | |
2576 | { | |
a54e2c05 | 2577 | eassert (window_row->enabled_p); |
177c0ea7 | 2578 | |
2a8bd25f GM |
2579 | /* Only when a desired row has been displayed, we want |
2580 | the corresponding frame row to be updated. */ | |
2581 | frame_row->enabled_p = 1; | |
177c0ea7 | 2582 | |
5f5c8ee5 GM |
2583 | /* Maybe insert a vertical border between horizontally adjacent |
2584 | windows. */ | |
3fc809e2 | 2585 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2586 | { |
2587 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2588 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2589 | } | |
2590 | ||
e509cfa6 | 2591 | #ifdef GLYPH_DEBUG |
a13396c9 GM |
2592 | /* Window row window_y must be a slice of frame row |
2593 | frame_y. */ | |
a54e2c05 | 2594 | eassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2595 | |
5f5c8ee5 GM |
2596 | /* If rows are in sync, we don't have to copy glyphs because |
2597 | frame and window share glyphs. */ | |
177c0ea7 | 2598 | |
a38634ff | 2599 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2600 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2601 | #endif |
5f5c8ee5 GM |
2602 | } |
2603 | ||
2604 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2605 | up with spaces, and visit leaf windows from left to right it | |
2606 | can be done simply. */ | |
177c0ea7 | 2607 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2608 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2609 | ||
5f5c8ee5 GM |
2610 | /* Next row. */ |
2611 | ++window_y; | |
2612 | ++frame_y; | |
2613 | } | |
2614 | } | |
2615 | ||
5f81871e RS |
2616 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2617 | ID, return a glyph that has a realized face ID. | |
2618 | This is used for glyphs displayed specially and not part of the text; | |
2619 | for instance, vertical separators, truncation markers, etc. */ | |
2620 | ||
3fc809e2 | 2621 | void |
971de7fb | 2622 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2623 | { |
3fc809e2 | 2624 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2625 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2626 | if (lface_id > 0) | |
2627 | { | |
2628 | int face_id = merge_faces (XFRAME (w->frame), | |
2629 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2630 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2631 | } |
5f81871e | 2632 | } |
5f5c8ee5 GM |
2633 | |
2634 | /* Add spaces to a glyph row ROW in a window matrix. | |
2635 | ||
2636 | Each row has the form: | |
2637 | ||
2638 | +---------+-----------------------------+------------+ | |
2639 | | left | text | right | | |
2640 | +---------+-----------------------------+------------+ | |
2641 | ||
2642 | Left and right marginal areas are optional. This function adds | |
2643 | spaces to areas so that there are no empty holes between areas. | |
2644 | In other words: If the right area is not empty, the text area | |
2645 | is filled up with spaces up to the right area. If the text area | |
2646 | is not empty, the left area is filled up. | |
2647 | ||
2648 | To be called for frame-based redisplay, only. */ | |
2649 | ||
2650 | static void | |
971de7fb | 2651 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2652 | { |
2653 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2654 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2655 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2656 | } | |
2657 | ||
2658 | ||
2659 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2660 | frame-based redisplay only. */ | |
2661 | ||
2662 | static void | |
971de7fb | 2663 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2664 | { |
2665 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2666 | { | |
2667 | struct glyph *end = row->glyphs[area + 1]; | |
2668 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2669 | ||
2670 | while (text < end) | |
2671 | *text++ = space_glyph; | |
2672 | row->used[area] = text - row->glyphs[area]; | |
2673 | } | |
2674 | } | |
2675 | ||
2676 | ||
2677 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2678 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2679 | ||
2680 | static void | |
971de7fb | 2681 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2682 | { |
2683 | int i = row->used[TEXT_AREA]; | |
2684 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2685 | |
5f5c8ee5 GM |
2686 | while (i < upto) |
2687 | glyph[i++] = space_glyph; | |
2688 | ||
2689 | row->used[TEXT_AREA] = i; | |
2690 | } | |
2691 | ||
2692 | ||
2693 | \f | |
2694 | /********************************************************************** | |
2695 | Mirroring operations on frame matrices in window matrices | |
2696 | **********************************************************************/ | |
2697 | ||
2698 | /* Set frame being updated via frame-based redisplay to F. This | |
2699 | function must be called before updates to make explicit that we are | |
2700 | working on frame matrices or not. */ | |
2701 | ||
55d4c1b2 | 2702 | static inline void |
971de7fb | 2703 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2704 | { |
2705 | frame_matrix_frame = f; | |
2706 | } | |
2707 | ||
2708 | ||
2709 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2710 | DESIRED_MATRIX is the desired matrix corresponding to | |
2711 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2712 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2713 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2714 | done in frame matrices, and that we have to perform analogous | |
2715 | operations in window matrices of frame_matrix_frame. */ | |
2716 | ||
55d4c1b2 | 2717 | static inline void |
971de7fb | 2718 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2719 | { |
2720 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2721 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2722 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2723 | |
2724 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2725 | between both rows, and does a structure assignment otherwise. */ | |
2726 | assign_row (current_row, desired_row); | |
2727 | ||
2728 | /* Enable current_row to mark it as valid. */ | |
2729 | current_row->enabled_p = 1; | |
e876ff42 | 2730 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2731 | |
2732 | /* If we are called on frame matrices, perform analogous operations | |
2733 | for window matrices. */ | |
2734 | if (frame_matrix_frame) | |
2735 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2736 | } | |
2737 | ||
2738 | ||
2739 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2740 | W's frame which has been made current (by swapping pointers between | |
2741 | current and desired matrix). Perform analogous operations in the | |
2742 | matrices of leaf windows in the window tree rooted at W. */ | |
2743 | ||
2744 | static void | |
971de7fb | 2745 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2746 | { |
2747 | while (w) | |
2748 | { | |
2749 | if (!NILP (w->hchild)) | |
2750 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2751 | else if (!NILP (w->vchild)) | |
2752 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2753 | else | |
2754 | { | |
2755 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2756 | here because the checks performed in debug mode there | |
2757 | will not allow the conversion. */ | |
2758 | int row = frame_row - w->desired_matrix->matrix_y; | |
2759 | ||
2760 | /* If FRAME_ROW is within W, assign the desired row to the | |
2761 | current row (exchanging glyph pointers). */ | |
2762 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2763 | { | |
2764 | struct glyph_row *current_row | |
2765 | = MATRIX_ROW (w->current_matrix, row); | |
2766 | struct glyph_row *desired_row | |
2767 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2768 | |
2769 | if (desired_row->enabled_p) | |
2770 | assign_row (current_row, desired_row); | |
2771 | else | |
2772 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2773 | current_row->enabled_p = 1; |
d009ae66 EZ |
2774 | |
2775 | /* Set the Y coordinate of the mode/header line's row. | |
2776 | It is needed in draw_row_with_mouse_face to find the | |
2777 | screen coordinates. (Window-based redisplay sets | |
2778 | this in update_window, but no one seems to do that | |
2779 | for frame-based redisplay.) */ | |
2780 | if (current_row->mode_line_p) | |
2781 | current_row->y = row; | |
5f5c8ee5 GM |
2782 | } |
2783 | } | |
177c0ea7 | 2784 | |
5f5c8ee5 GM |
2785 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2786 | } | |
2787 | } | |
2788 | ||
2789 | ||
2790 | /* Perform row dance after scrolling. We are working on the range of | |
2791 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2792 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2793 | row I in the range 0 <= I < NLINES, the index of the original line | |
2794 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2795 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2796 | row 0 <= I < NLINES which is empty. | |
2797 | ||
2798 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2799 | |
5f5c8ee5 | 2800 | void |
6f704c76 DN |
2801 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2802 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2803 | { |
2804 | /* A copy of original rows. */ | |
2805 | struct glyph_row *old_rows; | |
2806 | ||
2807 | /* Rows to assign to. */ | |
2808 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2809 | |
5f5c8ee5 GM |
2810 | int i; |
2811 | ||
2812 | /* Make a copy of the original rows. */ | |
2813 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2814 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2815 | |
2816 | /* Assign new rows, maybe clear lines. */ | |
2817 | for (i = 0; i < nlines; ++i) | |
2818 | { | |
2819 | int enabled_before_p = new_rows[i].enabled_p; | |
2820 | ||
a54e2c05 DA |
2821 | eassert (i + unchanged_at_top < matrix->nrows); |
2822 | eassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
5f5c8ee5 GM |
2823 | new_rows[i] = old_rows[copy_from[i]]; |
2824 | new_rows[i].enabled_p = enabled_before_p; | |
2825 | ||
2826 | /* RETAINED_P is zero for empty lines. */ | |
2827 | if (!retained_p[copy_from[i]]) | |
2828 | new_rows[i].enabled_p = 0; | |
2829 | } | |
2830 | ||
153a073c | 2831 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2832 | if (frame_matrix_frame) |
2833 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2834 | unchanged_at_top, nlines, copy_from, retained_p); | |
2835 | } | |
2836 | ||
2837 | ||
a13396c9 | 2838 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2839 | the current frame matrix. */ |
a13396c9 GM |
2840 | |
2841 | static void | |
971de7fb | 2842 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2843 | { |
2844 | struct frame *f = XFRAME (w->frame); | |
2845 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2846 | int left, right, x, width; |
a13396c9 | 2847 | |
5cb88111 | 2848 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a54e2c05 DA |
2849 | eassert (NILP (w->hchild) && NILP (w->vchild)); |
2850 | eassert (!FRAME_WINDOW_P (f)); | |
a13396c9 | 2851 | |
7df02016 KS |
2852 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2853 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2854 | x = w->current_matrix->matrix_x; |
2855 | width = w->current_matrix->matrix_w; | |
2856 | ||
a13396c9 GM |
2857 | window_row = w->current_matrix->rows; |
2858 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2859 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2860 | |
5cb88111 | 2861 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2862 | { |
5cb88111 GM |
2863 | window_row->glyphs[LEFT_MARGIN_AREA] |
2864 | = frame_row->glyphs[0] + x; | |
2865 | window_row->glyphs[TEXT_AREA] | |
2866 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2867 | window_row->glyphs[LAST_AREA] | |
2868 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2869 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2870 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2871 | } |
2872 | } | |
2873 | ||
2874 | ||
2875 | /* Return the window in the window tree rooted in W containing frame | |
2876 | row ROW. Value is null if none is found. */ | |
2877 | ||
09ad5a91 | 2878 | static struct window * |
971de7fb | 2879 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2880 | { |
2881 | struct window *found = NULL; | |
177c0ea7 | 2882 | |
a13396c9 GM |
2883 | while (w && !found) |
2884 | { | |
2885 | if (!NILP (w->hchild)) | |
2886 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2887 | else if (!NILP (w->vchild)) | |
2888 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2889 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2890 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2891 | found = w; |
177c0ea7 | 2892 | |
a13396c9 GM |
2893 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2894 | } | |
2895 | ||
2896 | return found; | |
2897 | } | |
2898 | ||
2899 | ||
5f5c8ee5 GM |
2900 | /* Perform a line dance in the window tree rooted at W, after |
2901 | scrolling a frame matrix in mirrored_line_dance. | |
2902 | ||
2903 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2904 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2905 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2906 | I < NLINES, the index of the original line to move to I. This | |
2907 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2908 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2909 | which is empty. */ | |
2910 | ||
2911 | static void | |
971de7fb | 2912 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2913 | { |
2914 | while (w) | |
2915 | { | |
2916 | if (!NILP (w->hchild)) | |
2917 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2918 | nlines, copy_from, retained_p); | |
2919 | else if (!NILP (w->vchild)) | |
2920 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2921 | nlines, copy_from, retained_p); | |
2922 | else | |
2923 | { | |
2924 | /* W is a leaf window, and we are working on its current | |
2925 | matrix m. */ | |
2926 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2927 | int i, sync_p = 0; |
5f5c8ee5 GM |
2928 | struct glyph_row *old_rows; |
2929 | ||
2930 | /* Make a copy of the original rows of matrix m. */ | |
2931 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2932 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2933 | |
2934 | for (i = 0; i < nlines; ++i) | |
2935 | { | |
2936 | /* Frame relative line assigned to. */ | |
2937 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2938 | |
5f5c8ee5 GM |
2939 | /* Frame relative line assigned. */ |
2940 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2941 | |
5f5c8ee5 GM |
2942 | /* Window relative line assigned to. */ |
2943 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2944 | |
5f5c8ee5 GM |
2945 | /* Window relative line assigned. */ |
2946 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2947 | |
5f5c8ee5 GM |
2948 | /* Is assigned line inside window? */ |
2949 | int from_inside_window_p | |
2950 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2951 | |
a13396c9 GM |
2952 | /* Is assigned to line inside window? */ |
2953 | int to_inside_window_p | |
2954 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2955 | |
a13396c9 | 2956 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2957 | { |
5f5c8ee5 GM |
2958 | /* Enabled setting before assignment. */ |
2959 | int enabled_before_p; | |
177c0ea7 | 2960 | |
5f5c8ee5 GM |
2961 | /* Do the assignment. The enabled_p flag is saved |
2962 | over the assignment because the old redisplay did | |
2963 | that. */ | |
2964 | enabled_before_p = m->rows[window_to].enabled_p; | |
2965 | m->rows[window_to] = old_rows[window_from]; | |
2966 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2967 | |
5f5c8ee5 GM |
2968 | /* If frame line is empty, window line is empty, too. */ |
2969 | if (!retained_p[copy_from[i]]) | |
2970 | m->rows[window_to].enabled_p = 0; | |
2971 | } | |
a13396c9 GM |
2972 | else if (to_inside_window_p) |
2973 | { | |
2974 | /* A copy between windows. This is an infrequent | |
2975 | case not worth optimizing. */ | |
2976 | struct frame *f = XFRAME (w->frame); | |
2977 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
2978 | struct window *w2; | |
2979 | struct glyph_matrix *m2; | |
2980 | int m2_from; | |
2981 | ||
fe8b8401 | 2982 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
2983 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
2984 | -nw', FROM_FRAME sometimes has no associated window. | |
2985 | This check avoids a segfault if W2 is null. */ | |
2986 | if (w2) | |
2987 | { | |
2988 | m2 = w2->current_matrix; | |
2989 | m2_from = frame_from - m2->matrix_y; | |
2990 | copy_row_except_pointers (m->rows + window_to, | |
2991 | m2->rows + m2_from); | |
2992 | ||
2993 | /* If frame line is empty, window line is empty, too. */ | |
2994 | if (!retained_p[copy_from[i]]) | |
2995 | m->rows[window_to].enabled_p = 0; | |
2996 | } | |
a13396c9 GM |
2997 | sync_p = 1; |
2998 | } | |
2999 | else if (from_inside_window_p) | |
3000 | sync_p = 1; | |
5f5c8ee5 | 3001 | } |
a13396c9 GM |
3002 | |
3003 | /* If there was a copy between windows, make sure glyph | |
3004 | pointers are in sync with the frame matrix. */ | |
3005 | if (sync_p) | |
3006 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3007 | |
5f5c8ee5 GM |
3008 | /* Check that no pointers are lost. */ |
3009 | CHECK_MATRIX (m); | |
3010 | } | |
3011 | ||
3012 | /* Next window on same level. */ | |
3013 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3014 | } | |
3015 | } | |
3016 | ||
3017 | ||
e509cfa6 | 3018 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3019 | |
3020 | /* Check that window and frame matrices agree about their | |
3021 | understanding where glyphs of the rows are to find. For each | |
3022 | window in the window tree rooted at W, check that rows in the | |
3023 | matrices of leaf window agree with their frame matrices about | |
3024 | glyph pointers. */ | |
3025 | ||
85fece3e | 3026 | static void |
59fc5cf9 | 3027 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3028 | { |
3029 | while (w) | |
3030 | { | |
3031 | if (!NILP (w->hchild)) | |
3032 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3033 | else if (!NILP (w->vchild)) | |
3034 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3035 | else | |
60a8948a | 3036 | { |
5f5c8ee5 GM |
3037 | struct frame *f = XFRAME (w->frame); |
3038 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3039 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3040 | } |
177c0ea7 | 3041 | |
5f5c8ee5 GM |
3042 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3043 | } | |
3044 | } | |
3045 | ||
3046 | ||
3047 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3048 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3049 | each row in WINDOW_MATRIX check that it's a slice of the | |
3050 | corresponding frame row. If it isn't, abort. */ | |
3051 | ||
3052 | static void | |
59fc5cf9 AS |
3053 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3054 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3055 | { |
3056 | /* Row number in WINDOW_MATRIX. */ | |
3057 | int i = 0; | |
3058 | ||
3059 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3060 | int j = window_matrix->matrix_y; | |
3061 | ||
177c0ea7 | 3062 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3063 | slice of the row in the frame matrix. If it isn't we didn't |
3064 | mirror an operation on the frame matrix correctly. */ | |
3065 | while (i < window_matrix->nrows) | |
3066 | { | |
3067 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3068 | frame_matrix->rows + j)) | |
3069 | abort (); | |
3070 | ++i, ++j; | |
3071 | } | |
3072 | } | |
3073 | ||
e509cfa6 | 3074 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 GM |
3075 | |
3076 | ||
3077 | \f | |
3078 | /********************************************************************** | |
3079 | VPOS and HPOS translations | |
3080 | **********************************************************************/ | |
3081 | ||
e509cfa6 | 3082 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3083 | |
3084 | /* Translate vertical position VPOS which is relative to window W to a | |
3085 | vertical position relative to W's frame. */ | |
3086 | ||
3087 | static int | |
59fc5cf9 | 3088 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3089 | { |
a54e2c05 DA |
3090 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
3091 | eassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); | |
7df02016 | 3092 | vpos += WINDOW_TOP_EDGE_LINE (w); |
a54e2c05 | 3093 | eassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3094 | return vpos; |
3095 | } | |
3096 | ||
3097 | ||
3098 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3099 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3100 | |
3101 | static int | |
59fc5cf9 | 3102 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3103 | { |
a54e2c05 | 3104 | eassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3105 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3106 | return hpos; |
3107 | } | |
177c0ea7 | 3108 | |
5f5c8ee5 GM |
3109 | #endif /* GLYPH_DEBUG */ |
3110 | ||
3111 | ||
3112 | \f | |
3113 | /********************************************************************** | |
3114 | Redrawing Frames | |
3115 | **********************************************************************/ | |
3116 | ||
a7ca3326 | 3117 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3118 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3119 | (Lisp_Object frame) |
5f5c8ee5 GM |
3120 | { |
3121 | struct frame *f; | |
3122 | ||
b7826503 | 3123 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3124 | f = XFRAME (frame); |
3125 | ||
3126 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3127 | (Implementation note: It still has to be checked why we are | |
3128 | called so early here). */ | |
3129 | if (!glyphs_initialized_initially_p) | |
3130 | return Qnil; | |
3131 | ||
3132 | update_begin (f); | |
3224dac1 | 3133 | #ifdef MSDOS |
f2adda5e | 3134 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3135 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3136 | #endif |
385ed61f | 3137 | clear_frame (f); |
5f5c8ee5 GM |
3138 | clear_current_matrices (f); |
3139 | update_end (f); | |
daf01701 | 3140 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3141 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3142 | windows_or_buffers_changed++; |
3143 | /* Mark all windows as inaccurate, so that every window will have | |
3144 | its redisplay done. */ | |
3145 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3146 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3147 | f->garbaged = 0; | |
3148 | return Qnil; | |
3149 | } | |
3150 | ||
3151 | ||
3152 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3153 | function redraw-frame. */ | |
3154 | ||
3155 | void | |
971de7fb | 3156 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3157 | { |
3158 | Lisp_Object frame; | |
3159 | XSETFRAME (frame, f); | |
3160 | Fredraw_frame (frame); | |
3161 | } | |
3162 | ||
3163 | ||
3164 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3165 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3166 | (void) |
5f5c8ee5 GM |
3167 | { |
3168 | Lisp_Object tail, frame; | |
3169 | ||
3170 | FOR_EACH_FRAME (tail, frame) | |
3171 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3172 | Fredraw_frame (frame); | |
3173 | ||
3174 | return Qnil; | |
3175 | } | |
3176 | ||
3177 | ||
5f5c8ee5 | 3178 | \f |
5f5c8ee5 GM |
3179 | /*********************************************************************** |
3180 | Frame Update | |
3181 | ***********************************************************************/ | |
4588ec20 | 3182 | |
5f5c8ee5 | 3183 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3184 | |
5f5c8ee5 GM |
3185 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3186 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3187 | scrolling. | |
177c0ea7 | 3188 | |
5f5c8ee5 | 3189 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3190 | |
5f5c8ee5 | 3191 | int |
971de7fb | 3192 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3193 | { |
3194 | /* 1 means display has been paused because of pending input. */ | |
3195 | int paused_p; | |
3196 | struct window *root_window = XWINDOW (f->root_window); | |
3197 | ||
a2130dbb KS |
3198 | if (redisplay_dont_pause) |
3199 | force_p = 1; | |
a2130dbb KS |
3200 | else if (NILP (Vredisplay_preemption_period)) |
3201 | force_p = 1; | |
3202 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3203 | { |
3204 | EMACS_TIME tm; | |
3205 | double p = XFLOATINT (Vredisplay_preemption_period); | |
d012c62b | 3206 | |
993d4ab6 KS |
3207 | if (detect_input_pending_ignore_squeezables ()) |
3208 | { | |
3209 | paused_p = 1; | |
3210 | goto do_pause; | |
3211 | } | |
3212 | ||
d012c62b | 3213 | EMACS_GET_TIME (tm); |
d35af63c | 3214 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
d012c62b KS |
3215 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); |
3216 | } | |
d012c62b | 3217 | |
5f5c8ee5 | 3218 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3219 | { |
5f5c8ee5 GM |
3220 | /* We are working on window matrix basis. All windows whose |
3221 | flag must_be_updated_p is set have to be updated. */ | |
3222 | ||
3223 | /* Record that we are not working on frame matrices. */ | |
3224 | set_frame_matrix_frame (NULL); | |
3225 | ||
3226 | /* Update all windows in the window tree of F, maybe stopping | |
3227 | when pending input is detected. */ | |
3228 | update_begin (f); | |
3229 | ||
3230 | /* Update the menu bar on X frames that don't have toolkit | |
3231 | support. */ | |
3232 | if (WINDOWP (f->menu_bar_window)) | |
3233 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3234 | ||
3235 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3236 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3237 | { |
9ea173e8 | 3238 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3239 | |
3240 | /* Update tool-bar window. */ | |
3241 | if (w->must_be_updated_p) | |
4588ec20 | 3242 | { |
153a073c PJ |
3243 | Lisp_Object tem; |
3244 | ||
5f5c8ee5 GM |
3245 | update_window (w, 1); |
3246 | w->must_be_updated_p = 0; | |
3247 | ||
3248 | /* Swap tool-bar strings. We swap because we want to | |
3249 | reuse strings. */ | |
9ea173e8 GM |
3250 | tem = f->current_tool_bar_string; |
3251 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3252 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3253 | } |
3254 | } | |
177c0ea7 | 3255 | |
5f5c8ee5 GM |
3256 | |
3257 | /* Update windows. */ | |
3258 | paused_p = update_window_tree (root_window, force_p); | |
3259 | update_end (f); | |
177c0ea7 | 3260 | |
6b61353c | 3261 | /* This flush is a performance bottleneck under X, |
e581a466 | 3262 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3263 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3264 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3265 | if (f->force_flush_display_p) |
e581a466 KL |
3266 | { |
3267 | FRAME_RIF (f)->flush_display (f); | |
3268 | f->force_flush_display_p = 0; | |
3269 | } | |
4588ec20 | 3270 | } |
5f5c8ee5 GM |
3271 | else |
3272 | { | |
3273 | /* We are working on frame matrix basis. Set the frame on whose | |
3274 | frame matrix we operate. */ | |
3275 | set_frame_matrix_frame (f); | |
3276 | ||
868dd24b | 3277 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3278 | build_frame_matrix (f); |
177c0ea7 | 3279 | |
868dd24b GM |
3280 | /* Update the display */ |
3281 | update_begin (f); | |
5f5c8ee5 | 3282 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3283 | update_end (f); |
3284 | ||
7d2f1216 | 3285 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3286 | { |
0b0d3e0b KL |
3287 | if (FRAME_TTY (f)->termscript) |
3288 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3289 | if (FRAME_TERMCAP_P (f)) |
3290 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3291 | } |
868dd24b | 3292 | |
5f5c8ee5 | 3293 | /* Check window matrices for lost pointers. */ |
e509cfa6 | 3294 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
3295 | check_window_matrix_pointers (root_window); |
3296 | add_frame_display_history (f, paused_p); | |
3297 | #endif | |
5f5c8ee5 GM |
3298 | } |
3299 | ||
993d4ab6 | 3300 | do_pause: |
5f5c8ee5 GM |
3301 | /* Reset flags indicating that a window should be updated. */ |
3302 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3303 | |
868dd24b | 3304 | display_completed = !paused_p; |
5f5c8ee5 | 3305 | return paused_p; |
4588ec20 | 3306 | } |
5f5c8ee5 GM |
3307 | |
3308 | ||
4588ec20 | 3309 | \f |
5f5c8ee5 GM |
3310 | /************************************************************************ |
3311 | Window-based updates | |
3312 | ************************************************************************/ | |
3313 | ||
3314 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3315 | don't stop updating when input is pending. */ | |
3316 | ||
3317 | static int | |
971de7fb | 3318 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3319 | { |
3320 | int paused_p = 0; | |
177c0ea7 | 3321 | |
5f5c8ee5 GM |
3322 | while (w && !paused_p) |
3323 | { | |
3324 | if (!NILP (w->hchild)) | |
3325 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3326 | else if (!NILP (w->vchild)) | |
3327 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3328 | else if (w->must_be_updated_p) | |
3329 | paused_p |= update_window (w, force_p); | |
3330 | ||
3331 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3332 | } | |
3333 | ||
3334 | return paused_p; | |
3335 | } | |
3336 | ||
3337 | ||
3338 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3339 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3340 | ||
3341 | void | |
971de7fb | 3342 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3343 | { |
3344 | if (w->must_be_updated_p) | |
3345 | { | |
3346 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3347 | ||
3348 | /* Record that this is not a frame-based redisplay. */ | |
3349 | set_frame_matrix_frame (NULL); | |
3350 | ||
a2130dbb KS |
3351 | if (redisplay_dont_pause) |
3352 | force_p = 1; | |
a2130dbb KS |
3353 | else if (NILP (Vredisplay_preemption_period)) |
3354 | force_p = 1; | |
3355 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3356 | { |
3357 | EMACS_TIME tm; | |
3358 | double p = XFLOATINT (Vredisplay_preemption_period); | |
d012c62b KS |
3359 | |
3360 | EMACS_GET_TIME (tm); | |
d35af63c | 3361 | preemption_period = EMACS_TIME_FROM_DOUBLE (p); |
d012c62b KS |
3362 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); |
3363 | } | |
d012c62b | 3364 | |
5f5c8ee5 GM |
3365 | /* Update W. */ |
3366 | update_begin (f); | |
3367 | update_window (w, force_p); | |
3368 | update_end (f); | |
4588ec20 | 3369 | |
5f5c8ee5 GM |
3370 | /* Reset flag in W. */ |
3371 | w->must_be_updated_p = 0; | |
3372 | } | |
3373 | } | |
4588ec20 | 3374 | |
93e023fc | 3375 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3376 | |
408f5064 GM |
3377 | /* Redraw lines from the current matrix of window W that are |
3378 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3379 | ||
3380 | static void | |
971de7fb | 3381 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3382 | { |
d8ee7803 | 3383 | int i; |
fa971ac3 | 3384 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3385 | |
408f5064 GM |
3386 | /* If rows overlapping others have been changed, the rows being |
3387 | overlapped have to be redrawn. This won't draw lines that have | |
3388 | already been drawn in update_window_line because overlapped_p in | |
3389 | desired rows is 0, so after row assignment overlapped_p in | |
3390 | current rows is 0. */ | |
3391 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3392 | { | |
e876ff42 | 3393 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3394 | |
3395 | if (!row->enabled_p) | |
3396 | break; | |
3397 | else if (row->mode_line_p) | |
3398 | continue; | |
177c0ea7 | 3399 | |
408f5064 GM |
3400 | if (row->overlapped_p) |
3401 | { | |
3402 | enum glyph_row_area area; | |
177c0ea7 | 3403 | |
408f5064 GM |
3404 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3405 | { | |
3406 | updated_row = row; | |
3407 | updated_area = area; | |
fa971ac3 KL |
3408 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3409 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3410 | if (row->used[area]) |
fa971ac3 KL |
3411 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3412 | row->used[area]); | |
3413 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3414 | } |
177c0ea7 | 3415 | |
408f5064 GM |
3416 | row->overlapped_p = 0; |
3417 | } | |
3418 | ||
e876ff42 | 3419 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3420 | break; |
3421 | } | |
3422 | } | |
3423 | ||
3424 | ||
3425 | /* Redraw lines from the current matrix of window W that overlap | |
3426 | others. YB is bottom-most y-position in W. */ | |
3427 | ||
3428 | static void | |
971de7fb | 3429 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3430 | { |
3431 | int i, bottom_y; | |
3432 | struct glyph_row *row; | |
fa971ac3 | 3433 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3434 | |
408f5064 GM |
3435 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3436 | { | |
3437 | row = w->current_matrix->rows + i; | |
3438 | ||
3439 | if (!row->enabled_p) | |
3440 | break; | |
3441 | else if (row->mode_line_p) | |
3442 | continue; | |
177c0ea7 | 3443 | |
408f5064 GM |
3444 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3445 | ||
b4b2c2ca | 3446 | if (row->overlapping_p) |
408f5064 | 3447 | { |
41124e06 YM |
3448 | int overlaps = 0; |
3449 | ||
b4b2c2ca | 3450 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3451 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3452 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3453 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3454 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3455 | overlaps |= OVERLAPS_SUCC; | |
3456 | ||
3457 | if (overlaps) | |
3458 | { | |
3459 | if (row->used[LEFT_MARGIN_AREA]) | |
3460 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3461 | ||
3462 | if (row->used[TEXT_AREA]) | |
3463 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3464 | ||
3465 | if (row->used[RIGHT_MARGIN_AREA]) | |
3466 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3467 | ||
c5e87d10 | 3468 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3469 | their display. */ |
3470 | if (overlaps & OVERLAPS_PRED) | |
3471 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3472 | if (overlaps & OVERLAPS_SUCC) | |
3473 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3474 | } | |
408f5064 GM |
3475 | } |
3476 | ||
3477 | if (bottom_y >= yb) | |
3478 | break; | |
3479 | } | |
3480 | } | |
3481 | ||
93e023fc KS |
3482 | #endif /* HAVE_WINDOW_SYSTEM */ |
3483 | ||
408f5064 | 3484 | |
09ad5a91 | 3485 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3486 | |
3487 | /* Check that no row in the current matrix of window W is enabled | |
3488 | which is below what's displayed in the window. */ | |
3489 | ||
09ad5a91 | 3490 | static void |
971de7fb | 3491 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3492 | { |
3493 | int last_seen_p = 0; | |
3494 | int i, yb = window_text_bottom_y (w); | |
3495 | ||
3496 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3497 | { | |
3498 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3499 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3500 | last_seen_p = 1; | |
3501 | else if (last_seen_p && row->enabled_p) | |
3502 | abort (); | |
3503 | } | |
3504 | } | |
3505 | ||
3506 | #endif /* GLYPH_DEBUG */ | |
3507 | ||
3508 | ||
5f5c8ee5 GM |
3509 | /* Update display of window W. FORCE_P non-zero means that we should |
3510 | not stop when detecting pending input. */ | |
3511 | ||
3512 | static int | |
971de7fb | 3513 | update_window (struct window *w, int force_p) |
4588ec20 | 3514 | { |
5f5c8ee5 GM |
3515 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3516 | int paused_p; | |
d012c62b | 3517 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3518 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3519 | #endif |
597cfb3f | 3520 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
e509cfa6 | 3521 | #ifdef GLYPH_DEBUG |
5f5c8ee5 | 3522 | /* Check that W's frame doesn't have glyph matrices. */ |
a54e2c05 | 3523 | eassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3524 | #endif |
5f5c8ee5 GM |
3525 | |
3526 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3527 | #if !PERIODIC_PREEMPTION_CHECKING |
3528 | if (!force_p) | |
a2d5fca0 | 3529 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3530 | #endif |
4588ec20 | 3531 | |
5f5c8ee5 GM |
3532 | /* If forced to complete the update, or if no input is pending, do |
3533 | the update. */ | |
8fd9a666 | 3534 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3535 | { |
5f5c8ee5 GM |
3536 | struct glyph_row *row, *end; |
3537 | struct glyph_row *mode_line_row; | |
56974e03 | 3538 | struct glyph_row *header_line_row; |
0bc32927 PE |
3539 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3540 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3541 | int n_updated = 0; | |
3542 | #endif | |
5f5c8ee5 GM |
3543 | |
3544 | rif->update_window_begin_hook (w); | |
3545 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3546 | row = desired_matrix->rows; |
3547 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3548 | |
394305db EZ |
3549 | /* Take note of the header line, if there is one. We will |
3550 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3551 | if (row->mode_line_p) |
56974e03 GM |
3552 | { |
3553 | header_line_row = row; | |
3554 | ++row; | |
3555 | } | |
3556 | else | |
3557 | header_line_row = NULL; | |
5f5c8ee5 GM |
3558 | |
3559 | /* Update the mode line, if necessary. */ | |
3560 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3561 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3562 | { | |
3563 | mode_line_row->y = yb; | |
3564 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3565 | desired_matrix), |
3566 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3567 | } |
3568 | ||
3569 | /* Find first enabled row. Optimizations in redisplay_internal | |
3570 | may lead to an update with only one row enabled. There may | |
3571 | be also completely empty matrices. */ | |
3572 | while (row < end && !row->enabled_p) | |
3573 | ++row; | |
177c0ea7 | 3574 | |
bfdcafe1 | 3575 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3576 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3577 | { |
3578 | int rc = scrolling_window (w, header_line_row != NULL); | |
3579 | if (rc < 0) | |
3580 | { | |
3581 | /* All rows were found to be equal. */ | |
3582 | paused_p = 0; | |
3583 | goto set_cursor; | |
3584 | } | |
3585 | else if (rc > 0) | |
6b61353c KH |
3586 | { |
3587 | /* We've scrolled the display. */ | |
3588 | force_p = 1; | |
3589 | changed_p = 1; | |
3590 | } | |
5f5c8ee5 GM |
3591 | } |
3592 | ||
3593 | /* Update the rest of the lines. */ | |
0bc32927 | 3594 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3595 | /* scrolling_window resets the enabled_p flag of the rows it |
3596 | reuses from current_matrix. */ | |
b7412313 | 3597 | if (row->enabled_p) |
5f5c8ee5 GM |
3598 | { |
3599 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3600 | int i; | |
177c0ea7 | 3601 | |
153a073c | 3602 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3603 | detect_input_pending. If it's done too often, |
3604 | scrolling large windows with repeated scroll-up | |
3605 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3606 | #if PERIODIC_PREEMPTION_CHECKING |
3607 | if (!force_p) | |
3608 | { | |
d35af63c | 3609 | EMACS_TIME tm; |
d012c62b | 3610 | EMACS_GET_TIME (tm); |
d35af63c | 3611 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b KS |
3612 | { |
3613 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3614 | if (detect_input_pending_ignore_squeezables ()) |
3615 | break; | |
d012c62b KS |
3616 | } |
3617 | } | |
3618 | #else | |
e87b8809 | 3619 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3620 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3621 | #endif |
e876ff42 GM |
3622 | changed_p |= update_window_line (w, vpos, |
3623 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3624 | |
3625 | /* Mark all rows below the last visible one in the current | |
3626 | matrix as invalid. This is necessary because of | |
3627 | variable line heights. Consider the case of three | |
3628 | successive redisplays, where the first displays 5 | |
3629 | lines, the second 3 lines, and the third 5 lines again. | |
3630 | If the second redisplay wouldn't mark rows in the | |
3631 | current matrix invalid, the third redisplay might be | |
3632 | tempted to optimize redisplay based on lines displayed | |
3633 | in the first redisplay. */ | |
3634 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3635 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3636 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3637 | } | |
3638 | ||
3639 | /* Was display preempted? */ | |
3640 | paused_p = row < end; | |
177c0ea7 | 3641 | |
56974e03 | 3642 | set_cursor: |
177c0ea7 | 3643 | |
6b61353c KH |
3644 | /* Update the header line after scrolling because a new header |
3645 | line would otherwise overwrite lines at the top of the window | |
3646 | that can be scrolled. */ | |
3647 | if (header_line_row && header_line_row->enabled_p) | |
3648 | { | |
3649 | header_line_row->y = 0; | |
3650 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3651 | } |
3652 | ||
153a073c | 3653 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3654 | if (!paused_p && !w->pseudo_window_p) |
3655 | { | |
93e023fc | 3656 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3657 | if (changed_p && rif->fix_overlapping_area) |
3658 | { | |
3659 | redraw_overlapped_rows (w, yb); | |
3660 | redraw_overlapping_rows (w, yb); | |
3661 | } | |
93e023fc | 3662 | #endif |
177c0ea7 | 3663 | |
5f5c8ee5 GM |
3664 | /* Make cursor visible at cursor position of W. */ |
3665 | set_window_cursor_after_update (w); | |
3666 | ||
e876ff42 GM |
3667 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3668 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3669 | IF_DEBUG (check_matrix_invariants (w)); |
3670 | #endif | |
4588ec20 | 3671 | } |
5f5c8ee5 | 3672 | |
e509cfa6 | 3673 | #ifdef GLYPH_DEBUG |
5f5c8ee5 GM |
3674 | /* Remember the redisplay method used to display the matrix. */ |
3675 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3676 | #endif | |
408f5064 | 3677 | |
6b61353c KH |
3678 | #ifdef HAVE_WINDOW_SYSTEM |
3679 | update_window_fringes (w, 0); | |
3680 | #endif | |
3681 | ||
56974e03 GM |
3682 | /* End the update of window W. Don't set the cursor if we |
3683 | paused updating the display because in this case, | |
3684 | set_window_cursor_after_update hasn't been called, and | |
3685 | output_cursor doesn't contain the cursor location. */ | |
3686 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3687 | } |
5f5c8ee5 GM |
3688 | else |
3689 | paused_p = 1; | |
3690 | ||
e509cfa6 | 3691 | #ifdef GLYPH_DEBUG |
0cffd9d8 | 3692 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3693 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3694 | #endif | |
177c0ea7 | 3695 | |
5f5c8ee5 | 3696 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3697 | |
5f5c8ee5 | 3698 | return paused_p; |
4588ec20 JB |
3699 | } |
3700 | ||
b64b3980 | 3701 | |
5f5c8ee5 GM |
3702 | /* Update the display of area AREA in window W, row number VPOS. |
3703 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3704 | ||
3705 | static void | |
971de7fb | 3706 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3707 | { |
5f5c8ee5 | 3708 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3709 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3710 | |
3711 | /* Let functions in xterm.c know what area subsequent X positions | |
3712 | will be relative to. */ | |
3713 | updated_area = area; | |
3714 | ||
3715 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3716 | of the area. I don't think that something more sophisticated is | |
3717 | necessary here, since marginal areas will not be the default. */ | |
3718 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3719 | if (desired_row->used[area]) | |
3720 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3721 | rif->clear_end_of_line (-1); | |
b64b3980 | 3722 | } |
23b0200c | 3723 | |
352f1545 | 3724 | |
408f5064 GM |
3725 | /* Update the display of the text area of row VPOS in window W. |
3726 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3727 | |
408f5064 | 3728 | static int |
971de7fb | 3729 | update_text_area (struct window *w, int vpos) |
23b0200c | 3730 | { |
5f5c8ee5 GM |
3731 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3732 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3733 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3734 | int changed_p = 0; |
5f5c8ee5 GM |
3735 | |
3736 | /* Let functions in xterm.c know what area subsequent X positions | |
3737 | will be relative to. */ | |
3738 | updated_area = TEXT_AREA; | |
177c0ea7 | 3739 | |
5f5c8ee5 GM |
3740 | /* If rows are at different X or Y, or rows have different height, |
3741 | or the current row is marked invalid, write the entire line. */ | |
3742 | if (!current_row->enabled_p | |
3743 | || desired_row->y != current_row->y | |
3744 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3745 | || desired_row->phys_ascent != current_row->phys_ascent |
3746 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3747 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3748 | || current_row->overlapped_p |
fee8b690 CY |
3749 | /* This next line is necessary for correctly redrawing |
3750 | mouse-face areas after scrolling and other operations. | |
3751 | However, it causes excessive flickering when mouse is moved | |
3752 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3753 | line doesn't seem to hurt anything. -- cyd. |
3754 | But it is still needed for the header line. -- kfs. */ | |
3755 | || (current_row->mouse_face_p | |
3756 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3757 | || current_row->x != desired_row->x) |
3758 | { | |
3759 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3760 | |
5f5c8ee5 GM |
3761 | if (desired_row->used[TEXT_AREA]) |
3762 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3763 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3764 | |
5f5c8ee5 GM |
3765 | /* Clear to end of window. */ |
3766 | rif->clear_end_of_line (-1); | |
408f5064 | 3767 | changed_p = 1; |
60f2f3f1 GM |
3768 | |
3769 | /* This erases the cursor. We do this here because | |
3770 | notice_overwritten_cursor cannot easily check this, which | |
3771 | might indicate that the whole functionality of | |
3772 | notice_overwritten_cursor would better be implemented here. | |
3773 | On the other hand, we need notice_overwritten_cursor as long | |
3774 | as mouse highlighting is done asynchronously outside of | |
3775 | redisplay. */ | |
3776 | if (vpos == w->phys_cursor.vpos) | |
3777 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3778 | } |
3779 | else | |
3780 | { | |
3781 | int stop, i, x; | |
3782 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3783 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3784 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3785 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3786 | int abort_skipping = 0; |
5f5c8ee5 | 3787 | |
78897758 YM |
3788 | /* If the desired row extends its face to the text area end, and |
3789 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3790 | make sure we write at least one glyph, so that the face |
3791 | extension actually takes place. */ | |
78897758 YM |
3792 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3793 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3794 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3795 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3796 | --desired_stop_pos; |
177c0ea7 | 3797 | |
5f5c8ee5 GM |
3798 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3799 | i = 0; | |
3800 | x = desired_row->x; | |
8399f8a0 GM |
3801 | |
3802 | /* Loop over glyphs that current and desired row may have | |
3803 | in common. */ | |
5f5c8ee5 | 3804 | while (i < stop) |
352f1545 | 3805 | { |
91d227d9 | 3806 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3807 | |
5f5c8ee5 | 3808 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3809 | don't have to be written. We can't skip if the last |
3810 | current glyph overlaps the glyph to its right. For | |
3811 | example, consider a current row of `if ' with the `f' in | |
3812 | Courier bold so that it overlaps the ` ' to its right. | |
3813 | If the desired row is ` ', we would skip over the space | |
3814 | after the `if' and there would remain a pixel from the | |
3815 | `f' on the screen. */ | |
3816 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3817 | { |
e47306e6 GM |
3818 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3819 | int left, right; | |
177c0ea7 | 3820 | |
e47306e6 GM |
3821 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3822 | &left, &right); | |
91d227d9 | 3823 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3824 | } |
177c0ea7 | 3825 | |
6d950f4c | 3826 | if (can_skip_p) |
352f1545 | 3827 | { |
91d227d9 CY |
3828 | int start_hpos = i; |
3829 | ||
6d950f4c GM |
3830 | while (i < stop |
3831 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3832 | { | |
3833 | x += desired_glyph->pixel_width; | |
3834 | ++desired_glyph, ++current_glyph, ++i; | |
3835 | } | |
3836 | ||
3837 | /* Consider the case that the current row contains "xxx | |
3838 | ppp ggg" in italic Courier font, and the desired row | |
3839 | is "xxx ggg". The character `p' has lbearing, `g' | |
3840 | has not. The loop above will stop in front of the | |
3841 | first `p' in the current row. If we would start | |
3842 | writing glyphs there, we wouldn't erase the lbearing | |
3843 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3844 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3845 | if (overlapping_glyphs_p |
3846 | && i > 0 | |
3847 | && i < current_row->used[TEXT_AREA] | |
3848 | && (current_row->used[TEXT_AREA] | |
3849 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3850 | { |
6d950f4c | 3851 | int left, right; |
177c0ea7 | 3852 | |
6d950f4c GM |
3853 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3854 | &left, &right); | |
3855 | while (left > 0 && i > 0) | |
3856 | { | |
3857 | --i, --desired_glyph, --current_glyph; | |
3858 | x -= desired_glyph->pixel_width; | |
3859 | left -= desired_glyph->pixel_width; | |
3860 | } | |
91d227d9 CY |
3861 | |
3862 | /* Abort the skipping algorithm if we end up before | |
3863 | our starting point, to avoid looping (bug#1070). | |
3864 | This can happen when the lbearing is larger than | |
3865 | the pixel width. */ | |
3866 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3867 | } |
352f1545 | 3868 | } |
177c0ea7 | 3869 | |
5f5c8ee5 GM |
3870 | /* Try to avoid writing the entire rest of the desired row |
3871 | by looking for a resync point. This mainly prevents | |
3872 | mode line flickering in the case the mode line is in | |
3873 | fixed-pitch font, which it usually will be. */ | |
3874 | if (i < desired_row->used[TEXT_AREA]) | |
3875 | { | |
3876 | int start_x = x, start_hpos = i; | |
3877 | struct glyph *start = desired_glyph; | |
3878 | int current_x = x; | |
6d950f4c GM |
3879 | int skip_first_p = !can_skip_p; |
3880 | ||
5f5c8ee5 GM |
3881 | /* Find the next glyph that's equal again. */ |
3882 | while (i < stop | |
6d950f4c GM |
3883 | && (skip_first_p |
3884 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3885 | && x == current_x) |
3886 | { | |
3887 | x += desired_glyph->pixel_width; | |
3888 | current_x += current_glyph->pixel_width; | |
3889 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3890 | skip_first_p = 0; |
5f5c8ee5 | 3891 | } |
23b0200c | 3892 | |
5f5c8ee5 GM |
3893 | if (i == start_hpos || x != current_x) |
3894 | { | |
3895 | i = start_hpos; | |
3896 | x = start_x; | |
3897 | desired_glyph = start; | |
3898 | break; | |
3899 | } | |
e47306e6 | 3900 | |
5f5c8ee5 GM |
3901 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3902 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3903 | changed_p = 1; |
5f5c8ee5 GM |
3904 | } |
3905 | } | |
177c0ea7 | 3906 | |
5f5c8ee5 GM |
3907 | /* Write the rest. */ |
3908 | if (i < desired_row->used[TEXT_AREA]) | |
3909 | { | |
3910 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3911 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3912 | changed_p = 1; |
5f5c8ee5 | 3913 | } |
177c0ea7 | 3914 | |
5f5c8ee5 GM |
3915 | /* Maybe clear to end of line. */ |
3916 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3917 | { | |
3918 | /* If new row extends to the end of the text area, nothing | |
3919 | has to be cleared, if and only if we did a write_glyphs | |
3920 | above. This is made sure by setting desired_stop_pos | |
3921 | appropriately above. */ | |
a54e2c05 | 3922 | eassert (i < desired_row->used[TEXT_AREA] |
78897758 YM |
3923 | || ((desired_row->used[TEXT_AREA] |
3924 | == current_row->used[TEXT_AREA]) | |
3925 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3926 | } |
3927 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3928 | { | |
3929 | /* If old row extends to the end of the text area, clear. */ | |
3930 | if (i >= desired_row->used[TEXT_AREA]) | |
3931 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3932 | desired_row->pixel_width); |
5f5c8ee5 | 3933 | rif->clear_end_of_line (-1); |
408f5064 | 3934 | changed_p = 1; |
5f5c8ee5 GM |
3935 | } |
3936 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3937 | { |
5f5c8ee5 GM |
3938 | /* Otherwise clear to the end of the old row. Everything |
3939 | after that position should be clear already. */ | |
27786b2f | 3940 | int xlim; |
177c0ea7 | 3941 | |
5f5c8ee5 GM |
3942 | if (i >= desired_row->used[TEXT_AREA]) |
3943 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3944 | desired_row->pixel_width); |
5f5c8ee5 GM |
3945 | |
3946 | /* If cursor is displayed at the end of the line, make sure | |
3947 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3948 | with which to erase the cursor (because this method | |
3949 | doesn't work with lbearing/rbearing), so we must do it | |
3950 | this way. */ | |
3951 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3952 | && (desired_row->reversed_p |
3953 | ? (w->phys_cursor.hpos < 0) | |
3954 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3955 | { |
3956 | w->phys_cursor_on_p = 0; | |
27786b2f | 3957 | xlim = -1; |
5f5c8ee5 GM |
3958 | } |
3959 | else | |
27786b2f PE |
3960 | xlim = current_row->pixel_width; |
3961 | rif->clear_end_of_line (xlim); | |
408f5064 | 3962 | changed_p = 1; |
2e8907d3 | 3963 | } |
23b0200c | 3964 | } |
408f5064 GM |
3965 | |
3966 | return changed_p; | |
23b0200c | 3967 | } |
4588ec20 | 3968 | |
5f5c8ee5 | 3969 | |
408f5064 GM |
3970 | /* Update row VPOS in window W. Value is non-zero if display has been |
3971 | changed. */ | |
5f5c8ee5 | 3972 | |
408f5064 | 3973 | static int |
971de7fb | 3974 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
3975 | { |
3976 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
3977 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3978 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3979 | int changed_p = 0; |
5f5c8ee5 | 3980 | |
5f5c8ee5 GM |
3981 | /* Set the row being updated. This is important to let xterm.c |
3982 | know what line height values are in effect. */ | |
3983 | updated_row = desired_row; | |
3984 | ||
177c0ea7 JB |
3985 | /* A row can be completely invisible in case a desired matrix was |
3986 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
3987 | the matrix. Make sure to make such rows current anyway, since |
3988 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
3989 | if (desired_row->mode_line_p |
3990 | || desired_row->visible_height > 0) | |
408f5064 | 3991 | { |
a54e2c05 | 3992 | eassert (desired_row->enabled_p); |
504805ac GM |
3993 | |
3994 | /* Update display of the left margin area, if there is one. */ | |
3995 | if (!desired_row->full_width_p | |
7df02016 | 3996 | && !NILP (w->left_margin_cols)) |
504805ac GM |
3997 | { |
3998 | changed_p = 1; | |
3999 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4000 | } | |
177c0ea7 | 4001 | |
504805ac GM |
4002 | /* Update the display of the text area. */ |
4003 | if (update_text_area (w, vpos)) | |
4004 | { | |
4005 | changed_p = 1; | |
4006 | if (current_row->mouse_face_p) | |
4007 | *mouse_face_overwritten_p = 1; | |
4008 | } | |
177c0ea7 | 4009 | |
504805ac GM |
4010 | /* Update display of the right margin area, if there is one. */ |
4011 | if (!desired_row->full_width_p | |
7df02016 | 4012 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4013 | { |
4014 | changed_p = 1; | |
4015 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4016 | } | |
177c0ea7 | 4017 | |
504805ac GM |
4018 | /* Draw truncation marks etc. */ |
4019 | if (!current_row->enabled_p | |
4020 | || desired_row->y != current_row->y | |
4021 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4022 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4023 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4024 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4025 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4026 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4027 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4028 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4029 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4030 | } |
177c0ea7 | 4031 | |
5f5c8ee5 GM |
4032 | /* Update current_row from desired_row. */ |
4033 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4034 | updated_row = NULL; | |
408f5064 | 4035 | return changed_p; |
5f5c8ee5 GM |
4036 | } |
4037 | ||
4038 | ||
4039 | /* Set the cursor after an update of window W. This function may only | |
4040 | be called from update_window. */ | |
4041 | ||
4042 | static void | |
971de7fb | 4043 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4044 | { |
5f5c8ee5 | 4045 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4046 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4047 | int cx, cy, vpos, hpos; |
4048 | ||
4049 | /* Not intended for frame matrix updates. */ | |
a54e2c05 | 4050 | eassert (FRAME_WINDOW_P (f)); |
177c0ea7 | 4051 | |
b96fd3e8 GM |
4052 | if (cursor_in_echo_area |
4053 | && !NILP (echo_area_buffer[0]) | |
4054 | /* If we are showing a message instead of the mini-buffer, | |
4055 | show the cursor for the message instead. */ | |
4056 | && XWINDOW (minibuf_window) == w | |
4057 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4058 | /* These cases apply only to the frame that contains |
4059 | the active mini-buffer window. */ | |
4060 | && FRAME_HAS_MINIBUF_P (f) | |
4061 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4062 | { | |
4063 | cx = cy = vpos = hpos = 0; | |
4064 | ||
4065 | if (cursor_in_echo_area >= 0) | |
4066 | { | |
4067 | /* If the mini-buffer is several lines high, find the last | |
4068 | line that has any text on it. Note: either all lines | |
4069 | are enabled or none. Otherwise we wouldn't be able to | |
4070 | determine Y. */ | |
862b4790 GM |
4071 | struct glyph_row *row, *last_row; |
4072 | struct glyph *glyph; | |
4073 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4074 | |
862b4790 | 4075 | last_row = NULL; |
6206f8ce GM |
4076 | row = w->current_matrix->rows; |
4077 | while (row->enabled_p | |
4078 | && (last_row == NULL | |
4079 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4080 | { |
862b4790 GM |
4081 | if (row->used[TEXT_AREA] |
4082 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4083 | last_row = row; | |
6206f8ce | 4084 | ++row; |
862b4790 | 4085 | } |
177c0ea7 | 4086 | |
5f5c8ee5 GM |
4087 | if (last_row) |
4088 | { | |
6206f8ce GM |
4089 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4090 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4091 | |
b96fd3e8 | 4092 | while (last > start && last->charpos < 0) |
862b4790 | 4093 | --last; |
177c0ea7 | 4094 | |
862b4790 GM |
4095 | for (glyph = start; glyph < last; ++glyph) |
4096 | { | |
4097 | cx += glyph->pixel_width; | |
4098 | ++hpos; | |
4099 | } | |
4100 | ||
5f5c8ee5 | 4101 | cy = last_row->y; |
862b4790 | 4102 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4103 | } |
4104 | } | |
4105 | } | |
4106 | else | |
4107 | { | |
4108 | cx = w->cursor.x; | |
4109 | cy = w->cursor.y; | |
4110 | hpos = w->cursor.hpos; | |
4111 | vpos = w->cursor.vpos; | |
4112 | } | |
4588ec20 | 4113 | |
5f5c8ee5 | 4114 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4115 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4116 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4117 | vpos = max (0, vpos); | |
4118 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4119 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4120 | } |
4588ec20 | 4121 | |
5f5c8ee5 | 4122 | |
6df5d75f GM |
4123 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4124 | tree rooted at W. */ | |
4125 | ||
4126 | void | |
971de7fb | 4127 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4128 | { |
4129 | while (w) | |
4130 | { | |
4131 | if (!NILP (w->hchild)) | |
4132 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4133 | else if (!NILP (w->vchild)) | |
4134 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4135 | else | |
4136 | w->must_be_updated_p = on_p; | |
4137 | ||
4138 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4139 | } | |
177c0ea7 | 4140 | } |
6df5d75f GM |
4141 | |
4142 | ||
4143 | \f | |
4144 | /*********************************************************************** | |
4145 | Window-Based Scrolling | |
4146 | ***********************************************************************/ | |
4147 | ||
4148 | /* Structure describing rows in scrolling_window. */ | |
4149 | ||
4150 | struct row_entry | |
4151 | { | |
4152 | /* Number of occurrences of this row in desired and current matrix. */ | |
4153 | int old_uses, new_uses; | |
177c0ea7 | 4154 | |
6df5d75f GM |
4155 | /* Vpos of row in new matrix. */ |
4156 | int new_line_number; | |
4157 | ||
4158 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4159 | ptrdiff_t bucket; |
177c0ea7 | 4160 | |
6df5d75f GM |
4161 | /* The row described by this entry. */ |
4162 | struct glyph_row *row; | |
177c0ea7 | 4163 | |
6df5d75f GM |
4164 | /* Hash collision chain. */ |
4165 | struct row_entry *next; | |
4166 | }; | |
4167 | ||
4168 | /* A pool to allocate row_entry structures from, and the size of the | |
4169 | pool. The pool is reallocated in scrolling_window when we find | |
4170 | that we need a larger one. */ | |
4171 | ||
4172 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4173 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4174 | |
4175 | /* Index of next free entry in row_entry_pool. */ | |
4176 | ||
ca9ce8f2 | 4177 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4178 | |
4179 | /* The hash table used during scrolling, and the table's size. This | |
4180 | table is used to quickly identify equal rows in the desired and | |
4181 | current matrix. */ | |
4182 | ||
4183 | static struct row_entry **row_table; | |
ca9ce8f2 | 4184 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4185 | |
4186 | /* Vectors of pointers to row_entry structures belonging to the | |
4187 | current and desired matrix, and the size of the vectors. */ | |
4188 | ||
4189 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4190 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4191 | |
4192 | /* A pool to allocate run structures from, and its size. */ | |
4193 | ||
4194 | static struct run *run_pool; | |
0065d054 | 4195 | static ptrdiff_t runs_size; |
6df5d75f GM |
4196 | |
4197 | /* A vector of runs of lines found during scrolling. */ | |
4198 | ||
4199 | static struct run **runs; | |
4200 | ||
6b1f9ba4 | 4201 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4202 | |
55d4c1b2 | 4203 | static inline struct row_entry * |
6b1f9ba4 | 4204 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4205 | { |
4206 | struct row_entry *entry; | |
ca9ce8f2 | 4207 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4208 | |
6df5d75f | 4209 | entry = row_table[i]; |
a54e2c05 | 4210 | eassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4211 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4212 | entry = entry->next; |
177c0ea7 | 4213 | |
6df5d75f GM |
4214 | if (entry == NULL) |
4215 | { | |
4216 | entry = row_entry_pool + row_entry_idx++; | |
4217 | entry->row = row; | |
4218 | entry->old_uses = entry->new_uses = 0; | |
4219 | entry->new_line_number = 0; | |
4220 | entry->bucket = i; | |
4221 | entry->next = row_table[i]; | |
4222 | row_table[i] = entry; | |
4223 | } | |
4224 | ||
4225 | return entry; | |
4226 | } | |
4227 | ||
4228 | ||
5f5c8ee5 | 4229 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4230 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4231 | |
4232 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4233 | Technique for Isolating Differences Between Files." It should take | |
4234 | O(N) time. | |
4235 | ||
4236 | A short outline of the steps of the algorithm | |
4237 | ||
4238 | 1. Skip lines equal at the start and end of both matrices. | |
4239 | ||
4240 | 2. Enter rows in the current and desired matrix into a symbol | |
4241 | table, counting how often they appear in both matrices. | |
4242 | ||
4243 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4244 | i.e. we assume that such lines are likely to have been moved. | |
4245 | ||
4246 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4247 | forward and backward. | |
4248 | ||
4249 | Value is | |
4250 | ||
4251 | -1 if all rows were found to be equal. | |
4252 | 0 to indicate that we did not scroll the display, or | |
4253 | 1 if we did scroll. */ | |
4254 | ||
4255 | static int | |
971de7fb | 4256 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4257 | { |
5f5c8ee5 GM |
4258 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4259 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4260 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4261 | ptrdiff_t i; |
4262 | int j, first_old, first_new, last_old, last_new; | |
4263 | int nruns, run_idx; | |
0065d054 | 4264 | ptrdiff_t n; |
6df5d75f | 4265 | struct row_entry *entry; |
fa971ac3 | 4266 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4267 | |
4268 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4269 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4270 | { |
bfdcafe1 GM |
4271 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4272 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4273 | ||
4274 | if (c->enabled_p | |
4275 | && d->enabled_p | |
6b61353c | 4276 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4277 | && c->y == d->y |
4278 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4279 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4280 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4281 | { |
4282 | assign_row (c, d); | |
4283 | d->enabled_p = 0; | |
4284 | } | |
4285 | else | |
4286 | break; | |
5f5c8ee5 | 4287 | } |
4588ec20 | 4288 | |
5f5c8ee5 GM |
4289 | /* Give up if some rows in the desired matrix are not enabled. */ |
4290 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4291 | return -1; | |
177c0ea7 | 4292 | |
5f5c8ee5 GM |
4293 | first_old = first_new = i; |
4294 | ||
4d8ade89 YM |
4295 | /* Set last_new to the index + 1 of the row that reaches the |
4296 | bottom boundary in the desired matrix. Give up if we find a | |
4297 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4298 | i = first_new + 1; |
4d8ade89 YM |
4299 | while (i < desired_matrix->nrows - 1) |
4300 | { | |
4301 | int bottom; | |
5f5c8ee5 | 4302 | |
4d8ade89 YM |
4303 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4304 | return 0; | |
4305 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4306 | if (bottom <= yb) | |
4307 | ++i; | |
4308 | if (bottom >= yb) | |
4309 | break; | |
4310 | } | |
5f5c8ee5 GM |
4311 | |
4312 | last_new = i; | |
4313 | ||
4d8ade89 YM |
4314 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4315 | boundary in the current matrix. We don't look at the enabled | |
4316 | flag here because we plan to reuse part of the display even if | |
4317 | other parts are disabled. */ | |
5f5c8ee5 | 4318 | i = first_old + 1; |
93962bfa GM |
4319 | while (i < current_matrix->nrows - 1) |
4320 | { | |
4321 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4322 | if (bottom <= yb) | |
4323 | ++i; | |
4324 | if (bottom >= yb) | |
4325 | break; | |
4326 | } | |
4327 | ||
5f5c8ee5 GM |
4328 | last_old = i; |
4329 | ||
4330 | /* Skip over rows equal at the bottom. */ | |
4331 | i = last_new; | |
4332 | j = last_old; | |
4333 | while (i - 1 > first_new | |
4334 | && j - 1 > first_old | |
1e5b2111 EZ |
4335 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4336 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4337 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4338 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4339 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4340 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4341 | --i, --j; |
4342 | last_new = i; | |
4343 | last_old = j; | |
4344 | ||
4345 | /* Nothing to do if all rows are equal. */ | |
4346 | if (last_new == first_new) | |
4347 | return 0; | |
4348 | ||
0065d054 | 4349 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4350 | |
4351 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4352 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4353 | So, set next_almost_prime_increment_max to 10. | |
4354 | ||
4355 | It's just a coincidence that next_almost_prime_increment_max == | |
4356 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4357 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4358 | because next_almost_prime (113) would be 127. */ | |
4359 | { | |
4360 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4361 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4362 | ptrdiff_t row_table_max = |
0065d054 PE |
4363 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4364 | - next_almost_prime_increment_max); | |
4365 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4366 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4367 | memory_full (SIZE_MAX); |
4368 | } | |
4369 | ||
6df5d75f | 4370 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4371 | |
6df5d75f | 4372 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4373 | old_lines = xpalloc (old_lines, &old_lines_size, |
4374 | current_matrix->nrows - old_lines_size, | |
4375 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4376 | |
6df5d75f | 4377 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4378 | new_lines = xpalloc (new_lines, &new_lines_size, |
4379 | desired_matrix->nrows - new_lines_size, | |
4380 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4381 | |
ca9ce8f2 PE |
4382 | n = desired_matrix->nrows; |
4383 | n += current_matrix->nrows; | |
0065d054 | 4384 | if (row_table_size < 3 * n) |
6df5d75f | 4385 | { |
ca9ce8f2 | 4386 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4387 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4388 | row_table_size = size; |
0065d054 | 4389 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4390 | } |
4391 | ||
4392 | if (n > row_entry_pool_size) | |
0065d054 PE |
4393 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4394 | n - row_entry_pool_size, | |
4395 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4396 | |
4397 | if (desired_matrix->nrows > runs_size) | |
4398 | { | |
0065d054 PE |
4399 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4400 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4401 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4402 | } |
4403 | ||
4404 | nruns = run_idx = 0; | |
4405 | row_entry_idx = 0; | |
4406 | ||
4407 | /* Add rows from the current and desired matrix to the hash table | |
4408 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4409 | |
5f5c8ee5 GM |
4410 | for (i = first_old; i < last_old; ++i) |
4411 | { | |
4412 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4413 | { | |
6b1f9ba4 | 4414 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4415 | old_lines[i] = entry; |
4416 | ++entry->old_uses; | |
5f5c8ee5 GM |
4417 | } |
4418 | else | |
6df5d75f | 4419 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4420 | } |
4421 | ||
5f5c8ee5 GM |
4422 | for (i = first_new; i < last_new; ++i) |
4423 | { | |
a54e2c05 | 4424 | eassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); |
6b1f9ba4 | 4425 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4426 | ++entry->new_uses; |
4427 | entry->new_line_number = i; | |
4428 | new_lines[i] = entry; | |
5f5c8ee5 | 4429 | } |
4588ec20 | 4430 | |
5f5c8ee5 GM |
4431 | /* Identify moves based on lines that are unique and equal |
4432 | in both matrices. */ | |
4433 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4434 | if (old_lines[i] |
4435 | && old_lines[i]->old_uses == 1 | |
4436 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4437 | { |
27786b2f | 4438 | int p, q; |
6df5d75f GM |
4439 | int new_line = old_lines[i]->new_line_number; |
4440 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4441 | |
4442 | /* Record move. */ | |
4443 | run->current_vpos = i; | |
4444 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4445 | run->desired_vpos = new_line; | |
4446 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4447 | run->nrows = 1; | |
4448 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4449 | ||
4450 | /* Extend backward. */ | |
27786b2f PE |
4451 | p = i - 1; |
4452 | q = new_line - 1; | |
4453 | while (p > first_old | |
4454 | && q > first_new | |
4455 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4456 | { |
27786b2f | 4457 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4458 | --run->current_vpos; |
4459 | --run->desired_vpos; | |
5f5c8ee5 GM |
4460 | ++run->nrows; |
4461 | run->height += h; | |
4462 | run->desired_y -= h; | |
4463 | run->current_y -= h; | |
27786b2f | 4464 | --p, --q; |
5f5c8ee5 | 4465 | } |
4588ec20 | 4466 | |
5f5c8ee5 | 4467 | /* Extend forward. */ |
27786b2f PE |
4468 | p = i + 1; |
4469 | q = new_line + 1; | |
4470 | while (p < last_old | |
4471 | && q < last_new | |
4472 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4473 | { |
27786b2f | 4474 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4475 | ++run->nrows; |
5f5c8ee5 | 4476 | run->height += h; |
27786b2f | 4477 | ++p, ++q; |
5f5c8ee5 | 4478 | } |
19dff8dc | 4479 | |
5f5c8ee5 GM |
4480 | /* Insert run into list of all runs. Order runs by copied |
4481 | pixel lines. Note that we record runs that don't have to | |
4482 | be copied because they are already in place. This is done | |
4483 | because we can avoid calling update_window_line in this | |
4484 | case. */ | |
27786b2f | 4485 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4486 | ; |
27786b2f PE |
4487 | for (q = nruns; q > p; --q) |
4488 | runs[q] = runs[q - 1]; | |
4489 | runs[p] = run; | |
5f5c8ee5 GM |
4490 | ++nruns; |
4491 | ||
4492 | i += run->nrows; | |
4493 | } | |
4494 | else | |
4495 | ++i; | |
4588ec20 | 4496 | |
5f5c8ee5 GM |
4497 | /* Do the moves. Do it in a way that we don't overwrite something |
4498 | we want to copy later on. This is not solvable in general | |
4499 | because there is only one display and we don't have a way to | |
4500 | exchange areas on this display. Example: | |
4588ec20 | 4501 | |
5f5c8ee5 GM |
4502 | +-----------+ +-----------+ |
4503 | | A | | B | | |
4504 | +-----------+ --> +-----------+ | |
4505 | | B | | A | | |
4506 | +-----------+ +-----------+ | |
4588ec20 | 4507 | |
5f5c8ee5 GM |
4508 | Instead, prefer bigger moves, and invalidate moves that would |
4509 | copy from where we copied to. */ | |
ea0d86af | 4510 | |
5f5c8ee5 GM |
4511 | for (i = 0; i < nruns; ++i) |
4512 | if (runs[i]->nrows > 0) | |
4513 | { | |
4514 | struct run *r = runs[i]; | |
24e86043 | 4515 | |
5f5c8ee5 GM |
4516 | /* Copy on the display. */ |
4517 | if (r->current_y != r->desired_y) | |
4518 | { | |
989b42d2 | 4519 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4520 | rif->scroll_run_hook (w, r); |
1305621b | 4521 | } |
5f5c8ee5 | 4522 | |
1305621b YM |
4523 | /* Truncate runs that copy to where we copied to, and |
4524 | invalidate runs that copy from where we copied to. */ | |
4525 | for (j = nruns - 1; j > i; --j) | |
4526 | { | |
4527 | struct run *p = runs[j]; | |
4528 | int truncated_p = 0; | |
5f5c8ee5 | 4529 | |
1305621b YM |
4530 | if (p->nrows > 0 |
4531 | && p->desired_y < r->desired_y + r->height | |
4532 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4533 | { |
1305621b YM |
4534 | if (p->desired_y < r->desired_y) |
4535 | { | |
4536 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4537 | p->height = r->desired_y - p->desired_y; | |
4538 | truncated_p = 1; | |
4539 | } | |
4540 | else | |
4541 | { | |
4542 | int nrows_copied = (r->desired_vpos + r->nrows | |
4543 | - p->desired_vpos); | |
4544 | ||
4545 | if (p->nrows <= nrows_copied) | |
4546 | p->nrows = 0; | |
4547 | else | |
4548 | { | |
4549 | int height_copied = (r->desired_y + r->height | |
4550 | - p->desired_y); | |
4551 | ||
4552 | p->current_vpos += nrows_copied; | |
4553 | p->desired_vpos += nrows_copied; | |
4554 | p->nrows -= nrows_copied; | |
4555 | p->current_y += height_copied; | |
4556 | p->desired_y += height_copied; | |
4557 | p->height -= height_copied; | |
4558 | truncated_p = 1; | |
4559 | } | |
4560 | } | |
4561 | } | |
177c0ea7 | 4562 | |
1305621b YM |
4563 | if (r->current_y != r->desired_y |
4564 | /* The condition below is equivalent to | |
4565 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4566 | && p->current_y < r->desired_y + r->height) |
1305621b | 4567 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4568 | && (p->current_y + p->height |
1305621b YM |
4569 | <= r->desired_y + r->height))) |
4570 | because we have 0 < p->height <= r->height. */ | |
4571 | && p->current_y < r->desired_y + r->height | |
4572 | && p->current_y + p->height > r->desired_y) | |
4573 | p->nrows = 0; | |
4574 | ||
4575 | /* Reorder runs by copied pixel lines if truncated. */ | |
4576 | if (truncated_p && p->nrows > 0) | |
4577 | { | |
4578 | int k = nruns - 1; | |
4579 | ||
4580 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4581 | k--; | |
4582 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4583 | runs[k] = p; | |
5f5c8ee5 GM |
4584 | } |
4585 | } | |
ea0d86af | 4586 | |
5f5c8ee5 GM |
4587 | /* Assign matrix rows. */ |
4588 | for (j = 0; j < r->nrows; ++j) | |
4589 | { | |
4590 | struct glyph_row *from, *to; | |
408f5064 | 4591 | int to_overlapped_p; |
e876ff42 | 4592 | |
5f5c8ee5 GM |
4593 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4594 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4595 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4596 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4597 | assign_row (to, from); |
1305621b YM |
4598 | /* The above `assign_row' actually does swap, so if we had |
4599 | an overlap in the copy destination of two runs, then | |
4600 | the second run would assign a previously disabled bogus | |
4601 | row. But thanks to the truncation code in the | |
4602 | preceding for-loop, we no longer have such an overlap, | |
4603 | and thus the assigned row should always be enabled. */ | |
a54e2c05 | 4604 | eassert (to->enabled_p); |
1305621b | 4605 | from->enabled_p = 0; |
408f5064 | 4606 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4607 | } |
4608 | } | |
15874c59 | 4609 | |
6df5d75f GM |
4610 | /* Clear the hash table, for the next time. */ |
4611 | for (i = 0; i < row_entry_idx; ++i) | |
4612 | row_table[row_entry_pool[i].bucket] = NULL; | |
4613 | ||
aec1708a PE |
4614 | /* Value is 1 to indicate that we scrolled the display. */ |
4615 | return 0 < nruns; | |
5f5c8ee5 | 4616 | } |
de83c314 | 4617 | |
15874c59 | 4618 | |
4588ec20 | 4619 | \f |
5f5c8ee5 GM |
4620 | /************************************************************************ |
4621 | Frame-Based Updates | |
4622 | ************************************************************************/ | |
4588ec20 | 4623 | |
5f5c8ee5 | 4624 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4625 | |
5f5c8ee5 GM |
4626 | FORCE_P non-zero means that the update should not be stopped by |
4627 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4628 | should not be tried. | |
4629 | ||
4630 | Value is non-zero if update was stopped due to pending input. */ | |
4631 | ||
4632 | static int | |
971de7fb | 4633 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4634 | { |
5f5c8ee5 GM |
4635 | /* Frame matrices to work on. */ |
4636 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4637 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4638 | int i; | |
27786b2f | 4639 | int pause_p; |
4588ec20 | 4640 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 | 4641 | |
a54e2c05 | 4642 | eassert (current_matrix && desired_matrix); |
4588ec20 | 4643 | |
c37e4889 RS |
4644 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4645 | calculate_costs (f); | |
4646 | ||
d88c2b9e RS |
4647 | if (preempt_count <= 0) |
4648 | preempt_count = 1; | |
4649 | ||
a2130dbb KS |
4650 | #if !PERIODIC_PREEMPTION_CHECKING |
4651 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4652 | { |
27786b2f | 4653 | pause_p = 1; |
4588ec20 JB |
4654 | goto do_pause; |
4655 | } | |
d012c62b | 4656 | #endif |
4588ec20 | 4657 | |
5f5c8ee5 | 4658 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4659 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4660 | inhibit_id_p = 1; |
7098a0fa | 4661 | |
efb859b4 | 4662 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4663 | i/d line if just want cursor motion. */ |
4664 | for (i = 0; i < desired_matrix->nrows; i++) | |
4665 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4666 | break; |
4667 | ||
4668 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4669 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4670 | force_p |= scrolling (f); | |
4588ec20 JB |
4671 | |
4672 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4673 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4674 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4675 | |
5f5c8ee5 GM |
4676 | /* Now update the rest of the lines. */ |
4677 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4678 | { |
5f5c8ee5 | 4679 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4680 | { |
b6a65ac2 | 4681 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4682 | { |
4683 | /* Flush out every so many lines. | |
4684 | Also flush out if likely to have more than 1k buffered | |
4685 | otherwise. I'm told that some telnet connections get | |
4686 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4687 | FILE *display_output = FRAME_TTY (f)->output; |
4688 | if (display_output) | |
4588ec20 | 4689 | { |
fced92f1 CY |
4690 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4691 | if (outq > 900 | |
4692 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4693 | { |
fced92f1 CY |
4694 | fflush (display_output); |
4695 | if (preempt_count == 1) | |
4696 | { | |
a41f8bed | 4697 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4698 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4699 | /* Probably not a tty. Ignore the error and reset | |
4700 | the outq count. */ | |
4701 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4702 | #endif |
fced92f1 CY |
4703 | outq *= 10; |
4704 | if (baud_rate <= outq && baud_rate > 0) | |
4705 | sleep (outq / baud_rate); | |
4706 | } | |
4588ec20 JB |
4707 | } |
4708 | } | |
4588ec20 JB |
4709 | } |
4710 | ||
d012c62b KS |
4711 | #if PERIODIC_PREEMPTION_CHECKING |
4712 | if (!force_p) | |
4713 | { | |
d35af63c | 4714 | EMACS_TIME tm; |
d012c62b | 4715 | EMACS_GET_TIME (tm); |
d35af63c | 4716 | if (EMACS_TIME_LT (preemption_next_check, tm)) |
d012c62b KS |
4717 | { |
4718 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4719 | if (detect_input_pending_ignore_squeezables ()) |
4720 | break; | |
d012c62b KS |
4721 | } |
4722 | } | |
4723 | #else | |
4724 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4725 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4726 | #endif |
a2960116 | 4727 | |
5f5c8ee5 | 4728 | update_frame_line (f, i); |
4588ec20 | 4729 | } |
4588ec20 | 4730 | } |
177c0ea7 | 4731 | |
27786b2f | 4732 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4733 | |
4734 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4735 | if (!pause_p) |
4588ec20 | 4736 | { |
48cf7030 | 4737 | if ((cursor_in_echo_area |
5f5c8ee5 | 4738 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4739 | show the cursor for the message instead of for the |
5f5c8ee5 | 4740 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4741 | || (EQ (minibuf_window, selected_window) |
4742 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4743 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4744 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4745 | the active mini-buffer window. */ |
2577053b | 4746 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4747 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4748 | { |
7df02016 | 4749 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4750 | int row, col; |
4751 | ||
4752 | if (cursor_in_echo_area < 0) | |
4753 | { | |
5f5c8ee5 GM |
4754 | /* Negative value of cursor_in_echo_area means put |
4755 | cursor at beginning of line. */ | |
648fa17d JB |
4756 | row = top; |
4757 | col = 0; | |
4758 | } | |
1113d9db | 4759 | else |
648fa17d | 4760 | { |
5f5c8ee5 GM |
4761 | /* Positive value of cursor_in_echo_area means put |
4762 | cursor at the end of the prompt. If the mini-buffer | |
4763 | is several lines high, find the last line that has | |
4764 | any text on it. */ | |
7df02016 | 4765 | row = FRAME_LINES (f); |
177c0ea7 | 4766 | do |
648fa17d | 4767 | { |
5f5c8ee5 GM |
4768 | --row; |
4769 | col = 0; | |
177c0ea7 | 4770 | |
5f5c8ee5 GM |
4771 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4772 | { | |
4773 | /* Frame rows are filled up with spaces that | |
4774 | must be ignored here. */ | |
5f5c8ee5 GM |
4775 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4776 | row); | |
4777 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4778 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4779 | ||
4780 | while (last > start | |
4781 | && (last - 1)->charpos < 0) | |
4782 | --last; | |
177c0ea7 | 4783 | |
5f5c8ee5 GM |
4784 | col = last - start; |
4785 | } | |
648fa17d JB |
4786 | } |
4787 | while (row > top && col == 0); | |
4788 | ||
6395da5c | 4789 | /* Make sure COL is not out of range. */ |
868e640e | 4790 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4791 | { |
6395da5c | 4792 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4793 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4794 | { |
7df02016 | 4795 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4796 | row++; |
4797 | } | |
4798 | /* Otherwise move it back in range. */ | |
4799 | else | |
868e640e | 4800 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4801 | } |
4802 | } | |
4803 | ||
385ed61f | 4804 | cursor_to (f, row, col); |
1113d9db | 4805 | } |
4588ec20 | 4806 | else |
5f5c8ee5 GM |
4807 | { |
4808 | /* We have only one cursor on terminal frames. Use it to | |
4809 | display the cursor of the selected window. */ | |
4810 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4811 | if (w->cursor.vpos >= 0 |
4812 | /* The cursor vpos may be temporarily out of bounds | |
4813 | in the following situation: There is one window, | |
4814 | with the cursor in the lower half of it. The window | |
4815 | is split, and a message causes a redisplay before | |
4816 | a new cursor position has been computed. */ | |
7df02016 | 4817 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4818 | { |
4819 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4820 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4821 | ||
7df02016 KS |
4822 | if (INTEGERP (w->left_margin_cols)) |
4823 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4824 | |
7df02016 | 4825 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4826 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4827 | } |
4828 | } | |
4588ec20 JB |
4829 | } |
4830 | ||
ef1b0ba7 | 4831 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4832 | do_pause: |
ef1b0ba7 | 4833 | #endif |
4588ec20 | 4834 | |
5f5c8ee5 | 4835 | clear_desired_matrices (f); |
27786b2f | 4836 | return pause_p; |
4588ec20 JB |
4837 | } |
4838 | ||
4588ec20 | 4839 | |
5f5c8ee5 | 4840 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4841 | |
5bf46f05 | 4842 | static int |
971de7fb | 4843 | scrolling (struct frame *frame) |
4588ec20 JB |
4844 | { |
4845 | int unchanged_at_top, unchanged_at_bottom; | |
4846 | int window_size; | |
4847 | int changed_lines; | |
7df02016 KS |
4848 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4849 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4850 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4851 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4852 | register int i; |
7df02016 | 4853 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4854 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4855 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4856 | |
5f5c8ee5 GM |
4857 | if (!current_matrix) |
4858 | abort (); | |
4588ec20 | 4859 | |
5f5c8ee5 GM |
4860 | /* Compute hash codes of all the lines. Also calculate number of |
4861 | changed lines, number of unchanged lines at the beginning, and | |
4862 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4863 | changed_lines = 0; |
4864 | unchanged_at_top = 0; | |
7df02016 KS |
4865 | unchanged_at_bottom = FRAME_LINES (frame); |
4866 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4867 | { |
4868 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4869 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4870 | return 0; |
5f5c8ee5 GM |
4871 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4872 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4873 | { |
4874 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4875 | new_hash[i] = old_hash[i]; | |
4876 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4877 | draw_cost[i] = INFINITY; | |
4878 | } | |
4588ec20 | 4879 | else |
f188b3c4 | 4880 | { |
5f5c8ee5 GM |
4881 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4882 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4883 | } |
4588ec20 JB |
4884 | |
4885 | if (old_hash[i] != new_hash[i]) | |
4886 | { | |
4887 | changed_lines++; | |
7df02016 | 4888 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4889 | } |
4890 | else if (i == unchanged_at_top) | |
4891 | unchanged_at_top++; | |
5f5c8ee5 | 4892 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4893 | } |
4894 | ||
4895 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4896 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4897 | && changed_lines < baud_rate / 2400) |
7df02016 | 4898 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4899 | return 1; |
4900 | ||
7df02016 | 4901 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4902 | - unchanged_at_bottom); |
4903 | ||
daf01701 | 4904 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4905 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4906 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4907 | free_at_end_vpos = -1; |
4908 | ||
4909 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4910 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4911 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4912 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4913 | && (window_size >= |
4914 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4915 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4916 | old_hash, new_hash, draw_cost))) |
4917 | return 0; | |
4918 | ||
5f5c8ee5 GM |
4919 | if (window_size < 2) |
4920 | return 0; | |
4921 | ||
502b9b64 | 4922 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4923 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4924 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4925 | old_hash + unchanged_at_top - 1, |
4926 | new_hash + unchanged_at_top - 1, | |
4927 | free_at_end_vpos - unchanged_at_top); | |
4928 | ||
4929 | return 0; | |
4930 | } | |
4588ec20 | 4931 | |
4588ec20 | 4932 | |
5f5c8ee5 GM |
4933 | /* Count the number of blanks at the start of the vector of glyphs R |
4934 | which is LEN glyphs long. */ | |
4588ec20 | 4935 | |
4588ec20 | 4936 | static int |
971de7fb | 4937 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4938 | { |
5f5c8ee5 | 4939 | int i; |
177c0ea7 | 4940 | |
5f5c8ee5 GM |
4941 | for (i = 0; i < len; ++i) |
4942 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4943 | break; | |
4944 | ||
4945 | return i; | |
4588ec20 JB |
4946 | } |
4947 | ||
5f5c8ee5 GM |
4948 | |
4949 | /* Count the number of glyphs in common at the start of the glyph | |
4950 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4951 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4952 | ||
4588ec20 | 4953 | static int |
971de7fb | 4954 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4955 | { |
5f5c8ee5 GM |
4956 | struct glyph *p1 = str1; |
4957 | struct glyph *p2 = str2; | |
177c0ea7 | 4958 | |
5f5c8ee5 GM |
4959 | while (p1 < end1 |
4960 | && p2 < end2 | |
42186983 | 4961 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 4962 | ++p1, ++p2; |
177c0ea7 | 4963 | |
5f5c8ee5 | 4964 | return p1 - str1; |
4588ec20 JB |
4965 | } |
4966 | ||
5f5c8ee5 | 4967 | |
4588ec20 | 4968 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 4969 | |
5e617bc2 | 4970 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 4971 | |
5f5c8ee5 GM |
4972 | |
4973 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
4974 | ||
4588ec20 | 4975 | static void |
971de7fb | 4976 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 4977 | { |
5f5c8ee5 | 4978 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
4979 | int tem; |
4980 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
4981 | struct glyph_matrix *current_matrix = f->current_matrix; |
4982 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
4983 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
4984 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
4985 | int must_write_whole_line_p; | |
daf01701 | 4986 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 4987 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
4988 | != FACE_TTY_DEFAULT_BG_COLOR); |
4989 | ||
4990 | if (colored_spaces_p) | |
4991 | write_spaces_p = 1; | |
5f5c8ee5 | 4992 | |
26c63686 GM |
4993 | /* Current row not enabled means it has unknown contents. We must |
4994 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
4995 | must_write_whole_line_p = !current_row->enabled_p; |
4996 | if (must_write_whole_line_p) | |
4588ec20 | 4997 | { |
5f5c8ee5 | 4998 | obody = 0; |
4588ec20 JB |
4999 | olen = 0; |
5000 | } | |
5001 | else | |
5002 | { | |
5f5c8ee5 GM |
5003 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5004 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5005 | |
4cecaab8 MB |
5006 | /* Ignore trailing spaces, if we can. */ |
5007 | if (!write_spaces_p) | |
5008 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5009 | olen--; | |
4588ec20 JB |
5010 | } |
5011 | ||
5f5c8ee5 GM |
5012 | current_row->enabled_p = 1; |
5013 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5014 | |
5f5c8ee5 GM |
5015 | /* If desired line is empty, just clear the line. */ |
5016 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5017 | { |
5018 | nlen = 0; | |
5019 | goto just_erase; | |
5020 | } | |
5021 | ||
5f5c8ee5 GM |
5022 | nbody = desired_row->glyphs[TEXT_AREA]; |
5023 | nlen = desired_row->used[TEXT_AREA]; | |
5024 | nend = nbody + nlen; | |
5025 | ||
5026 | /* If display line has unknown contents, write the whole line. */ | |
5027 | if (must_write_whole_line_p) | |
5028 | { | |
26c63686 | 5029 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5030 | if (!write_spaces_p) |
74ca462f GM |
5031 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5032 | --nlen; | |
5033 | ||
26c63686 | 5034 | /* Write the contents of the desired line. */ |
74ca462f | 5035 | if (nlen) |
26c63686 | 5036 | { |
385ed61f KL |
5037 | cursor_to (f, vpos, 0); |
5038 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5039 | } |
177c0ea7 | 5040 | |
26c63686 GM |
5041 | /* Don't call clear_end_of_line if we already wrote the whole |
5042 | line. The cursor will not be at the right margin in that | |
5043 | case but in the line below. */ | |
7df02016 | 5044 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5045 | { |
385ed61f KL |
5046 | cursor_to (f, vpos, nlen); |
5047 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5048 | } |
58827478 GM |
5049 | else |
5050 | /* Make sure we are in the right row, otherwise cursor movement | |
5051 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5052 | cursor_to (f, vpos, 0); |
177c0ea7 | 5053 | |
5f5c8ee5 GM |
5054 | make_current (desired_matrix, current_matrix, vpos); |
5055 | return; | |
5056 | } | |
4588ec20 JB |
5057 | |
5058 | /* Pretend trailing spaces are not there at all, | |
5059 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5060 | if (!write_spaces_p) |
5061 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5062 | nlen--; | |
4588ec20 JB |
5063 | |
5064 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5065 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5066 | { |
5f5c8ee5 | 5067 | int i, j; |
4588ec20 | 5068 | |
5f5c8ee5 GM |
5069 | /* Find the first glyph in desired row that doesn't agree with |
5070 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5071 | for (i = 0; i < nlen; i++) |
5072 | { | |
5f5c8ee5 | 5073 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5074 | { |
5f5c8ee5 GM |
5075 | /* Find the end of the run of different glyphs. */ |
5076 | j = i + 1; | |
5077 | while (j < nlen | |
5078 | && (j >= olen | |
5079 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5080 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5081 | ++j; | |
177c0ea7 JB |
5082 | |
5083 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5084 | cursor_to (f, vpos, i); |
5085 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5086 | i = j - 1; |
4588ec20 JB |
5087 | |
5088 | /* Now find the next non-match. */ | |
5089 | } | |
5090 | } | |
5091 | ||
5092 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5093 | if (olen > nlen) | |
5094 | { | |
385ed61f KL |
5095 | cursor_to (f, vpos, nlen); |
5096 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5097 | } |
5098 | ||
5f5c8ee5 GM |
5099 | /* Make current row = desired row. */ |
5100 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5101 | return; |
5102 | } | |
5103 | ||
5f5c8ee5 GM |
5104 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5105 | characters in a row. */ | |
5106 | ||
4588ec20 JB |
5107 | if (!olen) |
5108 | { | |
5f5c8ee5 GM |
5109 | /* If current line is blank, skip over initial spaces, if |
5110 | possible, and write the rest. */ | |
4cecaab8 | 5111 | if (write_spaces_p) |
5f5c8ee5 GM |
5112 | nsp = 0; |
5113 | else | |
5114 | nsp = count_blanks (nbody, nlen); | |
5115 | ||
4588ec20 JB |
5116 | if (nlen > nsp) |
5117 | { | |
385ed61f KL |
5118 | cursor_to (f, vpos, nsp); |
5119 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5120 | } |
5121 | ||
502b9b64 | 5122 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5123 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5124 | return; |
5125 | } | |
5126 | ||
4588ec20 | 5127 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5128 | osp = count_blanks (obody, olen); |
4cecaab8 | 5129 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5130 | |
5f5c8ee5 GM |
5131 | /* Compute number of matching chars starting with first non-blank. */ |
5132 | begmatch = count_match (obody + osp, obody + olen, | |
5133 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5134 | |
5135 | /* Spaces in new match implicit space past the end of old. */ | |
5136 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5137 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5138 | { |
5139 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5140 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5141 | ++begmatch; | |
4588ec20 JB |
5142 | } |
5143 | ||
5144 | /* Avoid doing insert/delete char | |
5145 | just cause number of leading spaces differs | |
5f5c8ee5 | 5146 | when the following text does not match. */ |
4588ec20 JB |
5147 | if (begmatch == 0 && osp != nsp) |
5148 | osp = nsp = min (osp, nsp); | |
5149 | ||
5150 | /* Find matching characters at end of line */ | |
5151 | op1 = obody + olen; | |
5152 | np1 = nbody + nlen; | |
5153 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5154 | while (op1 > op2 |
5155 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5156 | { |
5157 | op1--; | |
5158 | np1--; | |
5159 | } | |
5160 | endmatch = obody + olen - op1; | |
5161 | ||
4588ec20 JB |
5162 | /* tem gets the distance to insert or delete. |
5163 | endmatch is how many characters we save by doing so. | |
5164 | Is it worth it? */ | |
5165 | ||
5166 | tem = (nlen - nsp) - (olen - osp); | |
5167 | if (endmatch && tem | |
daf01701 | 5168 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5169 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5170 | endmatch = 0; |
5171 | ||
5172 | /* nsp - osp is the distance to insert or delete. | |
5173 | If that is nonzero, begmatch is known to be nonzero also. | |
5174 | begmatch + endmatch is how much we save by doing the ins/del. | |
5175 | Is it worth it? */ | |
5176 | ||
5177 | if (nsp != osp | |
daf01701 | 5178 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5179 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5180 | { |
5181 | begmatch = 0; | |
5182 | endmatch = 0; | |
5183 | osp = nsp = min (osp, nsp); | |
5184 | } | |
5185 | ||
5186 | /* Now go through the line, inserting, writing and | |
5187 | deleting as appropriate. */ | |
5188 | ||
5189 | if (osp > nsp) | |
5190 | { | |
385ed61f KL |
5191 | cursor_to (f, vpos, nsp); |
5192 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5193 | } |
5194 | else if (nsp > osp) | |
5195 | { | |
5196 | /* If going to delete chars later in line | |
5197 | and insert earlier in the line, | |
5198 | must delete first to avoid losing data in the insert */ | |
5199 | if (endmatch && nlen < olen + nsp - osp) | |
5200 | { | |
385ed61f KL |
5201 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5202 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5203 | olen = nlen - (nsp - osp); |
5204 | } | |
385ed61f KL |
5205 | cursor_to (f, vpos, osp); |
5206 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5207 | } |
5208 | olen += nsp - osp; | |
5209 | ||
5210 | tem = nsp + begmatch + endmatch; | |
5211 | if (nlen != tem || olen != tem) | |
5212 | { | |
4588ec20 JB |
5213 | if (!endmatch || nlen == olen) |
5214 | { | |
c363a1d6 GM |
5215 | /* If new text being written reaches right margin, there is |
5216 | no need to do clear-to-eol at the end of this function | |
5217 | (and it would not be safe, since cursor is not going to | |
5218 | be "at the margin" after the text is done). */ | |
7df02016 | 5219 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5220 | olen = 0; |
c363a1d6 GM |
5221 | |
5222 | /* Function write_glyphs is prepared to do nothing | |
5223 | if passed a length <= 0. Check it here to avoid | |
5224 | unnecessary cursor movement. */ | |
5225 | if (nlen - tem > 0) | |
5226 | { | |
385ed61f KL |
5227 | cursor_to (f, vpos, nsp + begmatch); |
5228 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5229 | } |
4588ec20 JB |
5230 | } |
5231 | else if (nlen > olen) | |
5232 | { | |
24e86043 KH |
5233 | /* Here, we used to have the following simple code: |
5234 | ---------------------------------------- | |
5235 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5236 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5237 | ---------------------------------------- | |
5238 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5239 | is a padding glyph. */ | |
5240 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5241 | int del; | |
5f5c8ee5 | 5242 | |
385ed61f | 5243 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5244 | |
5f5c8ee5 | 5245 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5246 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5247 | out--; | |
385ed61f | 5248 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5249 | |
5f5c8ee5 GM |
5250 | /* If we left columns to be overwritten, we must delete them. */ |
5251 | del = olen - tem - out; | |
c363a1d6 | 5252 | if (del > 0) |
385ed61f | 5253 | delete_glyphs (f, del); |
177c0ea7 | 5254 | |
5f5c8ee5 | 5255 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5256 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5257 | olen = nlen; |
5258 | } | |
5259 | else if (olen > nlen) | |
5260 | { | |
385ed61f KL |
5261 | cursor_to (f, vpos, nsp + begmatch); |
5262 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5263 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5264 | olen = nlen; |
5265 | } | |
bd9e3e75 | 5266 | } |
5f5c8ee5 GM |
5267 | |
5268 | just_erase: | |
5269 | /* If any unerased characters remain after the new line, erase them. */ | |
5270 | if (olen > nlen) | |
078b3696 | 5271 | { |
385ed61f KL |
5272 | cursor_to (f, vpos, nlen); |
5273 | clear_end_of_line (f, olen); | |
078b3696 | 5274 | } |
5f5c8ee5 GM |
5275 | |
5276 | /* Exchange contents between current_frame and new_frame. */ | |
5277 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5278 | } |
5f5c8ee5 GM |
5279 | |
5280 | ||
078b3696 | 5281 | \f |
5f5c8ee5 GM |
5282 | /*********************************************************************** |
5283 | X/Y Position -> Buffer Position | |
5284 | ***********************************************************************/ | |
5285 | ||
a1b0a6db | 5286 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5287 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5288 | Return in *POS the position in that object. |
2396cbba EZ |
5289 | Adjust *X and *Y to character positions. |
5290 | Return in *DX and *DY the pixel coordinates of the click, | |
5291 | relative to the top left corner of OBJECT, or relative to | |
5292 | the top left corner of the character glyph at (*X, *Y) | |
5293 | if OBJECT is nil. | |
5294 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5295 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5296 | |
6b61353c | 5297 | Lisp_Object |
971de7fb | 5298 | 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 | 5299 | { |
5f5c8ee5 | 5300 | struct it it; |
707ea971 | 5301 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5302 | struct text_pos startp; |
6b61353c KH |
5303 | Lisp_Object string; |
5304 | struct glyph_row *row; | |
cedd7cd9 KS |
5305 | #ifdef HAVE_WINDOW_SYSTEM |
5306 | struct image *img = 0; | |
5307 | #endif | |
2396cbba | 5308 | int x0, x1, to_x; |
57b3e30b | 5309 | void *itdata = NULL; |
5f5c8ee5 | 5310 | |
707ea971 CY |
5311 | /* We used to set current_buffer directly here, but that does the |
5312 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5313 | Fset_buffer (w->buffer); | |
57b3e30b | 5314 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5315 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5316 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5317 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5318 | start_display (&it, w, startp); | |
352ec8ff EZ |
5319 | /* start_display takes into account the header-line row, but IT's |
5320 | vpos still counts from the glyph row that includes the window's | |
5321 | start position. Adjust for a possible header-line row. */ | |
5322 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; | |
177c0ea7 | 5323 | |
9173a8fb | 5324 | x0 = *x; |
2396cbba EZ |
5325 | |
5326 | /* First, move to the beginning of the row corresponding to *Y. We | |
5327 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5328 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5329 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5330 | ||
5331 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5332 | glyph at *X. We add it.first_visible_x because iterator |
5333 | positions include the hscroll. */ | |
2396cbba EZ |
5334 | to_x = x0 + it.first_visible_x; |
5335 | if (it.bidi_it.paragraph_dir == R2L) | |
5336 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5337 | text area. This is because the iterator, even in R2L | |
5338 | paragraphs, delivers glyphs as if they started at the left | |
5339 | margin of the window. (When we actually produce glyphs for | |
5340 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5341 | iterator doesn't know about that.) The following line adjusts | |
5342 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5343 | move_it_* routines use. (The -1 is because in a window whose |
5344 | text-area width is W, the rightmost pixel position is W-1, and | |
5345 | it should be mirrored into zero pixel position.) */ | |
5346 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5347 | ||
5348 | /* Now move horizontally in the row to the glyph under *X. Second | |
5349 | argument is ZV to prevent move_it_in_display_line from matching | |
5350 | based on buffer positions. */ | |
2396cbba | 5351 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5352 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5353 | |
707ea971 | 5354 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5355 | |
6b61353c KH |
5356 | *dx = x0 + it.first_visible_x - it.current_x; |
5357 | *dy = *y - it.current_y; | |
5358 | ||
5359 | string = w->buffer; | |
5360 | if (STRINGP (it.string)) | |
5361 | string = it.string; | |
a1b0a6db | 5362 | *pos = it.current; |
86282aab KH |
5363 | if (it.what == IT_COMPOSITION |
5364 | && it.cmp_it.nchars > 1 | |
5365 | && it.cmp_it.reversed_p) | |
5366 | { | |
5367 | /* The current display element is a grapheme cluster in a | |
5368 | composition. In that case, we need the position of the first | |
5369 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5370 | it.current points to the last character of the cluster, thus | |
5371 | we must move back to the first character of the same | |
5372 | cluster. */ | |
5373 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5374 | if (STRINGP (it.string)) | |
5375 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5376 | else | |
425cc014 EZ |
5377 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5378 | CHARPOS (pos->pos)); | |
86282aab | 5379 | } |
6b61353c KH |
5380 | |
5381 | #ifdef HAVE_WINDOW_SYSTEM | |
5382 | if (it.what == IT_IMAGE) | |
5383 | { | |
6b61353c KH |
5384 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5385 | && !NILP (img->spec)) | |
5386 | *object = img->spec; | |
5387 | } | |
5388 | #endif | |
5389 | ||
b70d98e1 KS |
5390 | if (it.vpos < w->current_matrix->nrows |
5391 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5392 | row->enabled_p)) | |
6b61353c KH |
5393 | { |
5394 | if (it.hpos < row->used[TEXT_AREA]) | |
5395 | { | |
5396 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5397 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5398 | if (img) |
5399 | { | |
5400 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5401 | *dx += glyph->slice.img.x; |
5402 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5403 | /* Image slices positions are still relative to the entire image */ |
5404 | *width = img->width; | |
5405 | *height = img->height; | |
5406 | } | |
5407 | else | |
6b61353c | 5408 | #endif |
cedd7cd9 KS |
5409 | { |
5410 | *width = glyph->pixel_width; | |
5411 | *height = glyph->ascent + glyph->descent; | |
5412 | } | |
6b61353c KH |
5413 | } |
5414 | else | |
5415 | { | |
5416 | *width = 0; | |
5417 | *height = row->height; | |
5418 | } | |
5419 | } | |
5420 | else | |
5421 | { | |
5422 | *width = *height = 0; | |
5423 | } | |
5424 | ||
5425 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5426 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5427 | if (x0 > x1) |
5428 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5429 | ||
5430 | *x = it.hpos; | |
5431 | *y = it.vpos; | |
5432 | ||
5433 | return string; | |
5f5c8ee5 | 5434 | } |
4588ec20 | 5435 | |
5f5c8ee5 GM |
5436 | |
5437 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5438 | mode line or header line (PART says which) of window W, or nil if none. |
5439 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5440 | |
5441 | Lisp_Object | |
ace1712c | 5442 | mode_line_string (struct window *w, enum window_part part, |
d311d28c | 5443 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5444 | int *dx, int *dy, int *width, int *height) |
5f5c8ee5 GM |
5445 | { |
5446 | struct glyph_row *row; | |
5447 | struct glyph *glyph, *end; | |
6b61353c | 5448 | int x0, y0; |
5f5c8ee5 GM |
5449 | Lisp_Object string = Qnil; |
5450 | ||
641bdbf3 | 5451 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5452 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5453 | else | |
045dee35 | 5454 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5455 | y0 = *y - row->y; |
5456 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5457 | |
5458 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5459 | { |
5f5c8ee5 GM |
5460 | /* Find the glyph under X. If we find one with a string object, |
5461 | it's the one we were looking for. */ | |
5462 | glyph = row->glyphs[TEXT_AREA]; | |
5463 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5464 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5465 | x0 -= glyph->pixel_width; |
5466 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5467 | if (glyph < end) | |
5468 | { | |
5469 | string = glyph->object; | |
5470 | *charpos = glyph->charpos; | |
5471 | *width = glyph->pixel_width; | |
5472 | *height = glyph->ascent + glyph->descent; | |
5473 | #ifdef HAVE_WINDOW_SYSTEM | |
5474 | if (glyph->type == IMAGE_GLYPH) | |
5475 | { | |
5476 | struct image *img; | |
5477 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5478 | if (img != NULL) | |
5479 | *object = img->spec; | |
5480 | y0 -= row->ascent - glyph->ascent; | |
5481 | } | |
5482 | #endif | |
5483 | } | |
5484 | else | |
5485 | { | |
5486 | /* Add extra (default width) columns if clicked after EOL. */ | |
5487 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5488 | *width = 0; | |
5489 | *height = row->height; | |
5490 | } | |
5491 | } | |
5492 | else | |
5493 | { | |
5494 | *x = 0; | |
5495 | x0 = 0; | |
5496 | *width = *height = 0; | |
4588ec20 | 5497 | } |
5f5c8ee5 | 5498 | |
6b61353c KH |
5499 | *dx = x0; |
5500 | *dy = y0; | |
5501 | ||
5f5c8ee5 | 5502 | return string; |
4588ec20 | 5503 | } |
5f5c8ee5 GM |
5504 | |
5505 | ||
db1db309 GM |
5506 | /* Value is the string under window-relative coordinates X/Y in either |
5507 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5508 | the string returned. */ | |
5509 | ||
5510 | Lisp_Object | |
ace1712c | 5511 | marginal_area_string (struct window *w, enum window_part part, |
d311d28c | 5512 | int *x, int *y, ptrdiff_t *charpos, Lisp_Object *object, |
ace1712c | 5513 | int *dx, int *dy, int *width, int *height) |
db1db309 GM |
5514 | { |
5515 | struct glyph_row *row = w->current_matrix->rows; | |
5516 | struct glyph *glyph, *end; | |
6b61353c | 5517 | int x0, y0, i, wy = *y; |
641bdbf3 | 5518 | int area; |
db1db309 GM |
5519 | Lisp_Object string = Qnil; |
5520 | ||
641bdbf3 | 5521 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5522 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5523 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5524 | area = RIGHT_MARGIN_AREA; |
5525 | else | |
5526 | abort (); | |
5527 | ||
5528 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5529 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5530 | break; | |
6b61353c KH |
5531 | y0 = *y - row->y; |
5532 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5533 | |
5534 | if (row->enabled_p) | |
5535 | { | |
5536 | /* Find the glyph under X. If we find one with a string object, | |
5537 | it's the one we were looking for. */ | |
db1db309 | 5538 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5539 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5540 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5541 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5542 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5543 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5544 | else |
7df02016 | 5545 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5546 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5547 | : 0); |
5548 | ||
6b61353c KH |
5549 | glyph = row->glyphs[area]; |
5550 | end = glyph + row->used[area]; | |
cfde341f | 5551 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5552 | x0 -= glyph->pixel_width; |
5553 | *x = glyph - row->glyphs[area]; | |
5554 | if (glyph < end) | |
5555 | { | |
5556 | string = glyph->object; | |
5557 | *charpos = glyph->charpos; | |
5558 | *width = glyph->pixel_width; | |
5559 | *height = glyph->ascent + glyph->descent; | |
5560 | #ifdef HAVE_WINDOW_SYSTEM | |
5561 | if (glyph->type == IMAGE_GLYPH) | |
5562 | { | |
5563 | struct image *img; | |
5564 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5565 | if (img != NULL) | |
5566 | *object = img->spec; | |
5567 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5568 | x0 += glyph->slice.img.x; |
5569 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5570 | } |
5571 | #endif | |
5572 | } | |
5573 | else | |
5574 | { | |
5575 | /* Add extra (default width) columns if clicked after EOL. */ | |
5576 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5577 | *width = 0; | |
5578 | *height = row->height; | |
5579 | } | |
db1db309 | 5580 | } |
6b61353c KH |
5581 | else |
5582 | { | |
5583 | x0 = 0; | |
5584 | *x = 0; | |
5585 | *width = *height = 0; | |
5586 | } | |
5587 | ||
5588 | *dx = x0; | |
5589 | *dy = y0; | |
db1db309 GM |
5590 | |
5591 | return string; | |
5592 | } | |
5593 | ||
5594 | ||
5f5c8ee5 GM |
5595 | /*********************************************************************** |
5596 | Changing Frame Sizes | |
5597 | ***********************************************************************/ | |
4588ec20 JB |
5598 | |
5599 | #ifdef SIGWINCH | |
5f5c8ee5 | 5600 | |
9af30bdf | 5601 | static void |
971de7fb DN |
5602 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5603 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5604 | { |
5605 | int width, height; | |
4588ec20 JB |
5606 | int old_errno = errno; |
5607 | ||
28d7d09f | 5608 | struct tty_display_info *tty; |
4d553a13 | 5609 | |
333f1b6f JD |
5610 | signal (SIGWINCH, window_change_signal); |
5611 | SIGNAL_THREAD_CHECK (signalnum); | |
5612 | ||
9628b887 KL |
5613 | /* The frame size change obviously applies to a single |
5614 | termcap-controlled terminal, but we can't decide which. | |
5615 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5616 | */ |
5617 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5618 | |
0a125897 KL |
5619 | if (! tty->term_initted) |
5620 | continue; | |
4588ec20 | 5621 | |
db878925 DN |
5622 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5623 | use it. */ | |
5624 | if (!tty->input) | |
5625 | continue; | |
5626 | ||
0b0d3e0b | 5627 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5628 | |
bedeffcf | 5629 | if (width > 5 && height > 2) { |
9628b887 | 5630 | Lisp_Object tail, frame; |
3fc809e2 | 5631 | |
9628b887 | 5632 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5633 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5634 | /* Record the new sizes, but don't reallocate the data | |
5635 | structures now. Let that be done later outside of the | |
5636 | signal handler. */ | |
5637 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5638 | } |
4588ec20 | 5639 | } |
3fc809e2 | 5640 | |
4588ec20 JB |
5641 | errno = old_errno; |
5642 | } | |
5643 | #endif /* SIGWINCH */ | |
5644 | ||
5645 | ||
b96fd3e8 GM |
5646 | /* Do any change in frame size that was requested by a signal. SAFE |
5647 | non-zero means this function is called from a place where it is | |
5648 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5649 | |
dfcf069d | 5650 | void |
971de7fb | 5651 | do_pending_window_change (int safe) |
4588ec20 JB |
5652 | { |
5653 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5654 | if (redisplaying_p && !safe) |
5655 | return; | |
177c0ea7 | 5656 | |
4588ec20 JB |
5657 | while (delayed_size_change) |
5658 | { | |
35f56f96 | 5659 | Lisp_Object tail, frame; |
4588ec20 JB |
5660 | |
5661 | delayed_size_change = 0; | |
5662 | ||
35f56f96 | 5663 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5664 | { |
5f5c8ee5 | 5665 | struct frame *f = XFRAME (frame); |
35f56f96 | 5666 | |
7df02016 KS |
5667 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5668 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5669 | 0, 0, safe); | |
4588ec20 JB |
5670 | } |
5671 | } | |
5672 | } | |
5673 | ||
5674 | ||
502b9b64 | 5675 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5676 | indicate no change is to take place. |
4588ec20 | 5677 | |
b6a65ac2 JB |
5678 | If DELAY is non-zero, then assume we're being called from a signal |
5679 | handler, and queue the change for later - perhaps the next | |
5680 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5681 | from a signal handler. |
5682 | ||
5683 | SAFE non-zero means this function is called from a place where it's | |
5684 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5685 | |
dfcf069d | 5686 | void |
971de7fb | 5687 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5688 | { |
5689 | Lisp_Object tail, frame; | |
3826ea1a | 5690 | |
9628b887 | 5691 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5692 | { |
9628b887 KL |
5693 | /* On MS-DOS, all frames use the same screen, so a change in |
5694 | size affects all frames. Termcap now supports multiple | |
5695 | ttys. */ | |
45140e01 | 5696 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5697 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5698 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5699 | pretend, delay, safe); |
45140e01 RS |
5700 | } |
5701 | else | |
b96fd3e8 | 5702 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5703 | } |
5704 | ||
5705 | static void | |
971de7fb | 5706 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5707 | { |
7df02016 | 5708 | int new_frame_total_cols; |
d311d28c | 5709 | ptrdiff_t count = SPECPDL_INDEX (); |
3826ea1a | 5710 | |
4588ec20 | 5711 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5712 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5713 | { |
7df02016 KS |
5714 | f->new_text_lines = newheight; |
5715 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5716 | delayed_size_change = 1; |
5717 | return; | |
5718 | } | |
5719 | ||
502b9b64 | 5720 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5721 | f->new_text_lines = 0; |
5722 | f->new_text_cols = 0; | |
b6a65ac2 | 5723 | |
08f7aa3e | 5724 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5725 | if (newheight == 0) |
7df02016 | 5726 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5727 | if (newwidth == 0) |
7df02016 | 5728 | newwidth = FRAME_COLS (f); |
3826ea1a | 5729 | |
3b95a6f9 | 5730 | /* Compute width of windows in F. */ |
b6a65ac2 | 5731 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5732 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5733 | |
3b95a6f9 MR |
5734 | /* This is the width of the frame with vertical scroll bars and fringe |
5735 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5736 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5737 | ||
b6a65ac2 | 5738 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5739 | /* Frame width may be unchanged but the text portion may change, for |
5740 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5741 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5742 | /* Text portion unchanged? */ |
5743 | && newwidth == FRAME_COLS (f) | |
5744 | /* Frame width unchanged? */ | |
5745 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5746 | return; |
5747 | ||
cbb95688 RS |
5748 | BLOCK_INPUT; |
5749 | ||
886a8a6c KH |
5750 | #ifdef MSDOS |
5751 | /* We only can set screen dimensions to certain values supported | |
5752 | by our video hardware. Try to find the smallest size greater | |
5753 | or equal to the requested dimensions. */ | |
5754 | dos_set_window_size (&newheight, &newwidth); | |
5755 | #endif | |
5756 | ||
7df02016 | 5757 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5758 | { |
562dd5e9 | 5759 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5760 | |
48e482e6 EZ |
5761 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5762 | manipulating video hardware. */ | |
5763 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5764 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5765 | } |
5766 | ||
7df02016 | 5767 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5768 | { |
562dd5e9 | 5769 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5770 | |
48e482e6 EZ |
5771 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5772 | manipulating video hardware. */ | |
5773 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5774 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5775 | |
9ea173e8 | 5776 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5777 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5778 | } |
5779 | ||
7df02016 KS |
5780 | FRAME_LINES (f) = newheight; |
5781 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5782 | |
5f5c8ee5 GM |
5783 | { |
5784 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5785 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5786 | |
5f5c8ee5 GM |
5787 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5788 | &text_area_height); | |
5789 | if (w->cursor.x >= text_area_x + text_area_width) | |
5790 | w->cursor.hpos = w->cursor.x = 0; | |
5791 | if (w->cursor.y >= text_area_y + text_area_height) | |
5792 | w->cursor.vpos = w->cursor.y = 0; | |
5793 | } | |
986e61b8 | 5794 | |
5f5c8ee5 | 5795 | adjust_glyphs (f); |
5f5c8ee5 | 5796 | calculate_costs (f); |
cb02fa39 GM |
5797 | SET_FRAME_GARBAGED (f); |
5798 | f->resized_p = 1; | |
97cf50e7 RS |
5799 | |
5800 | UNBLOCK_INPUT; | |
61730a69 | 5801 | |
e523f7e5 RS |
5802 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5803 | ||
ef264c42 | 5804 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5805 | |
5806 | unbind_to (count, Qnil); | |
4588ec20 | 5807 | } |
5f5c8ee5 GM |
5808 | |
5809 | ||
4588ec20 | 5810 | \f |
5f5c8ee5 GM |
5811 | /*********************************************************************** |
5812 | Terminal Related Lisp Functions | |
5813 | ***********************************************************************/ | |
5814 | ||
5815 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5816 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5817 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5818 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5819 | (Lisp_Object file) |
5f5c8ee5 | 5820 | { |
0b0d3e0b KL |
5821 | struct tty_display_info *tty; |
5822 | ||
7d2f1216 EZ |
5823 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5824 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5825 | error ("Current frame is not on a tty device"); |
5826 | ||
5827 | tty = CURTTY (); | |
5828 | ||
5829 | if (tty->termscript != 0) | |
e18c7093 KL |
5830 | { |
5831 | BLOCK_INPUT; | |
0b0d3e0b | 5832 | fclose (tty->termscript); |
e18c7093 KL |
5833 | UNBLOCK_INPUT; |
5834 | } | |
0b0d3e0b | 5835 | tty->termscript = 0; |
5f5c8ee5 GM |
5836 | |
5837 | if (! NILP (file)) | |
5838 | { | |
5839 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5840 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5841 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5842 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5843 | } | |
5844 | return Qnil; | |
5845 | } | |
5846 | ||
5847 | ||
4588ec20 | 5848 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5849 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5850 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5851 | Control characters in STRING will have terminal-dependent effects. |
5852 | ||
6ed8eeff | 5853 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5854 | It may be a terminal object, a frame, or nil for the terminal used by |
5855 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5856 | when TERMINAL is nil. */) | |
5842a27b | 5857 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5858 | { |
7cef7ce3 SM |
5859 | struct terminal *t = get_terminal (terminal, 1); |
5860 | FILE *out; | |
0b0d3e0b | 5861 | |
94f3db62 | 5862 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5863 | CHECK_STRING (string); |
2c1e4409 | 5864 | BLOCK_INPUT; |
0b0d3e0b | 5865 | |
6ed8eeff KL |
5866 | if (!t) |
5867 | error ("Unknown terminal device"); | |
0b0d3e0b | 5868 | |
7cef7ce3 SM |
5869 | if (t->type == output_initial) |
5870 | out = stdout; | |
5871 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5872 | error ("Device %d is not a termcap terminal device", t->id); | |
5873 | else | |
5874 | { | |
5875 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5876 | |
7cef7ce3 SM |
5877 | if (! tty->output) |
5878 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5879 | |
7cef7ce3 SM |
5880 | if (tty->termscript) |
5881 | { | |
5882 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5883 | fflush (tty->termscript); | |
5884 | } | |
5885 | out = tty->output; | |
4588ec20 | 5886 | } |
7cef7ce3 SM |
5887 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5888 | fflush (out); | |
2c1e4409 | 5889 | UNBLOCK_INPUT; |
4588ec20 JB |
5890 | return Qnil; |
5891 | } | |
5892 | ||
5f5c8ee5 | 5893 | |
a7ca3326 | 5894 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5895 | doc: /* Beep, or flash the screen. |
228299fa | 5896 | Also, unless an argument is given, |
7ee72033 | 5897 | terminate any keyboard macro currently executing. */) |
5842a27b | 5898 | (Lisp_Object arg) |
4588ec20 | 5899 | { |
efb859b4 | 5900 | if (!NILP (arg)) |
4588ec20 | 5901 | { |
7fa788da RS |
5902 | if (noninteractive) |
5903 | putchar (07); | |
5904 | else | |
385ed61f | 5905 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5906 | } |
5907 | else | |
5908 | bitch_at_user (); | |
5909 | ||
5910 | return Qnil; | |
5911 | } | |
5912 | ||
dfcf069d | 5913 | void |
971de7fb | 5914 | bitch_at_user (void) |
4588ec20 JB |
5915 | { |
5916 | if (noninteractive) | |
5917 | putchar (07); | |
5f5c8ee5 | 5918 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5919 | error ("Keyboard macro terminated by a command ringing the bell"); |
5920 | else | |
385ed61f | 5921 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5922 | } |
5923 | ||
5f5c8ee5 GM |
5924 | |
5925 | \f | |
5926 | /*********************************************************************** | |
5927 | Sleeping, Waiting | |
5928 | ***********************************************************************/ | |
5929 | ||
a7ca3326 | 5930 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5931 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5932 | SECONDS may be a floating-point value, meaning that you can wait for a |
5933 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
d35af63c | 5934 | additional wait period, in milliseconds; this is for backwards compatibility. |
7ee72033 | 5935 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5936 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5937 | { |
d311d28c | 5938 | double duration = extract_float (seconds); |
4588ec20 | 5939 | |
d311d28c PE |
5940 | if (!NILP (milliseconds)) |
5941 | { | |
5942 | CHECK_NUMBER (milliseconds); | |
5943 | duration += XINT (milliseconds) / 1000.0; | |
5944 | } | |
b07646f5 | 5945 | |
d35af63c PE |
5946 | if (0 < duration) |
5947 | { | |
5948 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (duration); | |
f1dd8073 | 5949 | wait_reading_process_output (min (EMACS_SECS (t), WAIT_READING_MAX), |
d35af63c PE |
5950 | EMACS_NSECS (t), 0, 0, Qnil, NULL, 0); |
5951 | } | |
4588ec20 JB |
5952 | |
5953 | return Qnil; | |
5954 | } | |
5955 | ||
5f5c8ee5 | 5956 | |
dcd1ca45 | 5957 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 5958 | it does redisplay. |
f76475ad | 5959 | |
2bcac766 CY |
5960 | TIMEOUT is number of seconds to wait (float or integer), |
5961 | or t to wait forever. | |
902b9b6d KS |
5962 | READING is 1 if reading input. |
5963 | If DO_DISPLAY is >0 display process output while waiting. | |
5964 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
5965 | */ | |
4588ec20 | 5966 | |
f76475ad | 5967 | Lisp_Object |
971de7fb | 5968 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 5969 | { |
d35af63c PE |
5970 | intmax_t sec; |
5971 | int nsec; | |
f222369e | 5972 | |
902b9b6d | 5973 | swallow_events (do_display); |
ccddf474 | 5974 | |
902b9b6d | 5975 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 5976 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 5977 | return Qnil; |
4588ec20 | 5978 | |
902b9b6d KS |
5979 | if (do_display >= 2) |
5980 | redisplay_preserve_echo_area (2); | |
5981 | ||
d35af63c | 5982 | if (INTEGERP (timeout)) |
2bcac766 | 5983 | { |
d35af63c PE |
5984 | sec = XINT (timeout); |
5985 | if (! (0 < sec)) | |
5986 | return Qt; | |
5987 | nsec = 0; | |
2bcac766 | 5988 | } |
d35af63c | 5989 | else if (FLOATP (timeout)) |
d311d28c | 5990 | { |
d35af63c PE |
5991 | double seconds = XFLOAT_DATA (timeout); |
5992 | if (! (0 < seconds)) | |
d311d28c | 5993 | return Qt; |
d35af63c PE |
5994 | else |
5995 | { | |
5996 | EMACS_TIME t = EMACS_TIME_FROM_DOUBLE (seconds); | |
f1dd8073 | 5997 | sec = min (EMACS_SECS (t), WAIT_READING_MAX); |
d35af63c PE |
5998 | nsec = EMACS_NSECS (t); |
5999 | } | |
6000 | } | |
6001 | else if (EQ (timeout, Qt)) | |
6002 | { | |
6003 | sec = 0; | |
6004 | nsec = 0; | |
d311d28c | 6005 | } |
d35af63c PE |
6006 | else |
6007 | wrong_type_argument (Qnumberp, timeout); | |
6008 | ||
dfdb645c | 6009 | |
4588ec20 | 6010 | #ifdef SIGIO |
8fc798e9 | 6011 | gobble_input (0); |
f76475ad JB |
6012 | #endif |
6013 | ||
d35af63c | 6014 | wait_reading_process_output (sec, nsec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6015 | Qnil, NULL, 0); |
f76475ad | 6016 | |
4588ec20 JB |
6017 | return detect_input_pending () ? Qnil : Qt; |
6018 | } | |
6019 | ||
5f5c8ee5 | 6020 | |
a7ca3326 | 6021 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
6022 | doc: /* Perform redisplay. |
6023 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
6024 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
6025 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
6026 | preempted by arriving input, so FORCE does nothing. | |
6027 | ||
6028 | Return t if redisplay was performed, nil if redisplay was preempted | |
6029 | immediately by pending input. */) | |
5842a27b | 6030 | (Lisp_Object force) |
f76475ad | 6031 | { |
d311d28c | 6032 | ptrdiff_t count; |
659d9874 | 6033 | |
902b9b6d KS |
6034 | swallow_events (1); |
6035 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6036 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6037 | || !NILP (Vexecuting_kbd_macro)) |
6038 | return Qnil; | |
f76475ad | 6039 | |
01327edf KS |
6040 | count = SPECPDL_INDEX (); |
6041 | if (!NILP (force) && !redisplay_dont_pause) | |
6042 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6043 | redisplay_preserve_echo_area (2); |
01327edf | 6044 | unbind_to (count, Qnil); |
7ba07a1a | 6045 | return Qt; |
f76475ad | 6046 | } |
5f5c8ee5 GM |
6047 | |
6048 | ||
6049 | \f | |
6050 | /*********************************************************************** | |
6051 | Other Lisp Functions | |
6052 | ***********************************************************************/ | |
6053 | ||
6054 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6055 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6056 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6057 | |
6058 | static Lisp_Object frame_and_buffer_state; | |
6059 | ||
6060 | ||
6061 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6062 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6063 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6064 | VARIABLE is a variable name whose value is either nil or a state vector |
6065 | that will be updated to contain all frames and buffers, | |
228299fa | 6066 | aside from buffers whose names start with space, |
44edd521 RS |
6067 | along with the buffers' read-only and modified flags. This allows a fast |
6068 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6069 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6070 | the current state. |
6071 | ||
6072 | If VARIABLE is nil, an internal variable is used. Users should not | |
6073 | pass nil for VARIABLE. */) | |
5842a27b | 6074 | (Lisp_Object variable) |
5f5c8ee5 | 6075 | { |
44edd521 RS |
6076 | Lisp_Object state, tail, frame, buf; |
6077 | Lisp_Object *vecp, *end; | |
54e1617f | 6078 | ptrdiff_t n; |
5f5c8ee5 | 6079 | |
44edd521 RS |
6080 | if (! NILP (variable)) |
6081 | { | |
6082 | CHECK_SYMBOL (variable); | |
6083 | state = Fsymbol_value (variable); | |
6084 | if (! VECTORP (state)) | |
6085 | goto changed; | |
6086 | } | |
6087 | else | |
6088 | state = frame_and_buffer_state; | |
6089 | ||
6090 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6091 | end = vecp + ASIZE (state); |
44edd521 | 6092 | |
5f5c8ee5 GM |
6093 | FOR_EACH_FRAME (tail, frame) |
6094 | { | |
44edd521 RS |
6095 | if (vecp == end) |
6096 | goto changed; | |
5f5c8ee5 GM |
6097 | if (!EQ (*vecp++, frame)) |
6098 | goto changed; | |
44edd521 RS |
6099 | if (vecp == end) |
6100 | goto changed; | |
5f5c8ee5 GM |
6101 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6102 | goto changed; | |
6103 | } | |
44edd521 | 6104 | /* Check that the buffer info matches. */ |
7539e11f | 6105 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6106 | { |
7539e11f | 6107 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6108 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6109 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6110 | continue; |
44edd521 RS |
6111 | if (vecp == end) |
6112 | goto changed; | |
5f5c8ee5 GM |
6113 | if (!EQ (*vecp++, buf)) |
6114 | goto changed; | |
44edd521 RS |
6115 | if (vecp == end) |
6116 | goto changed; | |
4b4deea2 | 6117 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6118 | goto changed; |
44edd521 RS |
6119 | if (vecp == end) |
6120 | goto changed; | |
5f5c8ee5 GM |
6121 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6122 | goto changed; | |
6123 | } | |
44edd521 RS |
6124 | if (vecp == end) |
6125 | goto changed; | |
5f5c8ee5 GM |
6126 | /* Detect deletion of a buffer at the end of the list. */ |
6127 | if (EQ (*vecp, Qlambda)) | |
6128 | return Qnil; | |
44edd521 RS |
6129 | |
6130 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6131 | changed: |
44edd521 RS |
6132 | /* Count the size we will need. |
6133 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6134 | n = 1; |
6135 | FOR_EACH_FRAME (tail, frame) | |
6136 | n += 2; | |
7539e11f | 6137 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6138 | n += 3; |
44edd521 RS |
6139 | /* Reallocate the vector if data has grown to need it, |
6140 | or if it has shrunk a lot. */ | |
6141 | if (! VECTORP (state) | |
77b37c05 PE |
6142 | || n > ASIZE (state) |
6143 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6144 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6145 | { |
6146 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6147 | if (! NILP (variable)) | |
6148 | Fset (variable, state); | |
6149 | else | |
6150 | frame_and_buffer_state = state; | |
6151 | } | |
6152 | ||
6153 | /* Record the new data in the (possibly reallocated) vector. */ | |
6154 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6155 | FOR_EACH_FRAME (tail, frame) |
6156 | { | |
6157 | *vecp++ = frame; | |
6158 | *vecp++ = XFRAME (frame)->name; | |
6159 | } | |
7539e11f | 6160 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6161 | { |
7539e11f | 6162 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6163 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6164 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6165 | continue; |
6166 | *vecp++ = buf; | |
4b4deea2 | 6167 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6168 | *vecp++ = Fbuffer_modified_p (buf); |
6169 | } | |
6170 | /* Fill up the vector with lambdas (always at least one). */ | |
6171 | *vecp++ = Qlambda; | |
44edd521 | 6172 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6173 | < ASIZE (state)) |
5f5c8ee5 GM |
6174 | *vecp++ = Qlambda; |
6175 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6176 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6177 | > ASIZE (state)) |
5f5c8ee5 GM |
6178 | abort (); |
6179 | return Qt; | |
6180 | } | |
6181 | ||
6182 | ||
4588ec20 | 6183 | \f |
5f5c8ee5 GM |
6184 | /*********************************************************************** |
6185 | Initialization | |
6186 | ***********************************************************************/ | |
6187 | ||
5f5c8ee5 GM |
6188 | /* Initialization done when Emacs fork is started, before doing stty. |
6189 | Determine terminal type and set terminal_driver. Then invoke its | |
6190 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6191 | |
dfcf069d | 6192 | void |
971de7fb | 6193 | init_display (void) |
4588ec20 | 6194 | { |
28d440ab KL |
6195 | char *terminal_type; |
6196 | ||
5f5c8ee5 GM |
6197 | /* Construct the space glyph. */ |
6198 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6199 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6200 | space_glyph.charpos = -1; |
6201 | ||
4588ec20 JB |
6202 | inverse_video = 0; |
6203 | cursor_in_echo_area = 0; | |
6204 | terminal_type = (char *) 0; | |
6205 | ||
1315c181 JB |
6206 | /* Now is the time to initialize this; it's used by init_sys_modes |
6207 | during startup. */ | |
2246281f | 6208 | Vinitial_window_system = Qnil; |
4588ec20 | 6209 | |
4181ad9c KL |
6210 | /* SIGWINCH needs to be handled no matter what display we start |
6211 | with. Otherwise newly opened tty frames will not resize | |
6212 | automatically. */ | |
6213 | #ifdef SIGWINCH | |
6214 | #ifndef CANNOT_DUMP | |
6215 | if (initialized) | |
6216 | #endif /* CANNOT_DUMP */ | |
6217 | signal (SIGWINCH, window_change_signal); | |
6218 | #endif /* SIGWINCH */ | |
4588ec20 | 6219 | |
d6ef42b9 | 6220 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6221 | if (IS_DAEMON) |
6222 | return; | |
d6ef42b9 | 6223 | |
1315c181 JB |
6224 | /* If the user wants to use a window system, we shouldn't bother |
6225 | initializing the terminal. This is especially important when the | |
6226 | terminal is so dumb that emacs gives up before and doesn't bother | |
6227 | using the window system. | |
4588ec20 | 6228 | |
36bbad1d KH |
6229 | If the DISPLAY environment variable is set and nonempty, |
6230 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6231 | |
6232 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6233 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6234 | { |
36bbad1d | 6235 | char *display; |
36bbad1d | 6236 | display = getenv ("DISPLAY"); |
36bbad1d | 6237 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6238 | |
6239 | if (display_arg && !x_display_ok (display)) | |
6240 | { | |
6241 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6242 | display); | |
6243 | inhibit_window_system = 1; | |
6244 | } | |
f040093a | 6245 | } |
d460af17 | 6246 | |
4fcc2638 | 6247 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6248 | { |
111d9af3 | 6249 | Vinitial_window_system = Qx; |
4588ec20 JB |
6250 | #ifdef HAVE_X11 |
6251 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6252 | #endif |
9311dcff | 6253 | #ifdef GNU_LINUX |
039e5d71 | 6254 | /* In some versions of ncurses, |
6a428f77 | 6255 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6256 | So call tgetent. */ |
6257 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6258 | #endif |
5f5c8ee5 | 6259 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6260 | return; |
6261 | } | |
6262 | #endif /* HAVE_X_WINDOWS */ | |
6263 | ||
fd2e066a | 6264 | #ifdef HAVE_NTGUI |
177c0ea7 | 6265 | if (!inhibit_window_system) |
fd2e066a | 6266 | { |
111d9af3 | 6267 | Vinitial_window_system = Qw32; |
fd2e066a | 6268 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6269 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6270 | return; |
6271 | } | |
6272 | #endif /* HAVE_NTGUI */ | |
6273 | ||
edfda783 AR |
6274 | #ifdef HAVE_NS |
6275 | if (!inhibit_window_system | |
6276 | #ifndef CANNOT_DUMP | |
6277 | && initialized | |
6278 | #endif | |
6279 | ) | |
6280 | { | |
111d9af3 | 6281 | Vinitial_window_system = Qns; |
5e617bc2 | 6282 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6283 | adjust_frame_glyphs_initially (); |
6284 | return; | |
6285 | } | |
6286 | #endif | |
6287 | ||
4588ec20 JB |
6288 | /* If no window system has been specified, try to use the terminal. */ |
6289 | if (! isatty (0)) | |
6290 | { | |
1559a86d | 6291 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6292 | exit (1); |
6293 | } | |
6294 | ||
6152361f JR |
6295 | #ifdef WINDOWSNT |
6296 | terminal_type = "w32console"; | |
6297 | #else | |
153a073c | 6298 | /* Look at the TERM variable. */ |
4588ec20 | 6299 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6300 | #endif |
4588ec20 JB |
6301 | if (!terminal_type) |
6302 | { | |
5d12ff0b | 6303 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6304 | if (! inhibit_window_system) |
6305 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6306 | else |
6307 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6308 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6309 | exit (1); |
6310 | } | |
6311 | ||
0a125897 | 6312 | { |
6ed8eeff | 6313 | struct terminal *t; |
3224dac1 KL |
6314 | struct frame *f = XFRAME (selected_frame); |
6315 | ||
6316 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6317 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6318 | |
6319 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6320 | if (f->output_method != output_initial) |
3224dac1 | 6321 | abort (); |
6ed8eeff KL |
6322 | f->output_method = t->type; |
6323 | f->terminal = t; | |
3224dac1 | 6324 | |
6ed8eeff | 6325 | t->reference_count++; |
7ac5dac9 EZ |
6326 | #ifdef MSDOS |
6327 | f->output_data.tty->display_info = &the_only_display_info; | |
6328 | #else | |
6329 | if (f->output_method == output_termcap) | |
6330 | create_tty_output (f); | |
6331 | #endif | |
6ed8eeff | 6332 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6333 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6334 | FrameRows (t->display_info.tty), |
6335 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6336 | |
6ed8eeff KL |
6337 | /* Delete the initial terminal. */ |
6338 | if (--initial_terminal->reference_count == 0 | |
6339 | && initial_terminal->delete_terminal_hook) | |
6340 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6341 | |
6342 | /* Update frame parameters to reflect the new type. */ | |
6343 | Fmodify_frame_parameters | |
6344 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6345 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6346 | if (t->display_info.tty->name) |
6347 | Fmodify_frame_parameters (selected_frame, | |
6348 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6349 | Qnil)); | |
6350 | else | |
6351 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6352 | Qnil)); | |
0a125897 | 6353 | } |
3fc809e2 | 6354 | |
d86c299a | 6355 | { |
91fb7e1b | 6356 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6357 | int width = FRAME_TOTAL_COLS (sf); |
6358 | int height = FRAME_LINES (sf); | |
d86c299a | 6359 | |
5f5c8ee5 | 6360 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6361 | change. It's not clear what better we could do. The rest of |
6362 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6363 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6364 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6365 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6366 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6367 | < (width + 2) * height)) | |
1559a86d | 6368 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6369 | } |
6370 | ||
5f5c8ee5 | 6371 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6372 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6373 | |
5f5c8ee5 GM |
6374 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6375 | if (initialized | |
6376 | && !noninteractive | |
2246281f | 6377 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6378 | { |
6379 | /* For the initial frame, we don't have any way of knowing what | |
6380 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6381 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6382 | |
f9d2fdc4 EZ |
6383 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6384 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6385 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6386 | } | |
5f5c8ee5 GM |
6387 | } |
6388 | ||
6389 | ||
6390 | \f | |
6391 | /*********************************************************************** | |
6392 | Blinking cursor | |
6393 | ***********************************************************************/ | |
6394 | ||
c3f13540 | 6395 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6396 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6397 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6398 | WINDOW nil means use the selected window. SHOW non-nil means |
6399 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6400 | don't show a cursor. */) |
5842a27b | 6401 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6402 | { |
5f5c8ee5 GM |
6403 | /* Don't change cursor state while redisplaying. This could confuse |
6404 | output routines. */ | |
6405 | if (!redisplaying_p) | |
6406 | { | |
6407 | if (NILP (window)) | |
6408 | window = selected_window; | |
6409 | else | |
b7826503 | 6410 | CHECK_WINDOW (window); |
177c0ea7 | 6411 | |
5d7791b3 | 6412 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6413 | } |
6414 | ||
6415 | return Qnil; | |
4588ec20 | 6416 | } |
5f5c8ee5 GM |
6417 | |
6418 | ||
5d7791b3 GM |
6419 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6420 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6421 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6422 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6423 | (Lisp_Object window) |
5d7791b3 GM |
6424 | { |
6425 | struct window *w; | |
177c0ea7 | 6426 | |
5d7791b3 GM |
6427 | if (NILP (window)) |
6428 | window = selected_window; | |
6429 | else | |
b7826503 | 6430 | CHECK_WINDOW (window); |
177c0ea7 | 6431 | |
5d7791b3 | 6432 | w = XWINDOW (window); |
177c0ea7 | 6433 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6434 | } |
6435 | ||
87478b52 SM |
6436 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6437 | Slast_nonminibuf_frame, 0, 0, 0, | |
6438 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6439 | (void) |
87478b52 | 6440 | { |
4958ed94 | 6441 | Lisp_Object frame = Qnil; |
87478b52 | 6442 | |
4958ed94 SM |
6443 | if (last_nonminibuf_frame) |
6444 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6445 | |
6446 | return frame; | |
6447 | } | |
4588ec20 | 6448 | \f |
5f5c8ee5 GM |
6449 | /*********************************************************************** |
6450 | Initialization | |
6451 | ***********************************************************************/ | |
6452 | ||
dfcf069d | 6453 | void |
971de7fb | 6454 | syms_of_display (void) |
4588ec20 | 6455 | { |
502b9b64 | 6456 | defsubr (&Sredraw_frame); |
4588ec20 | 6457 | defsubr (&Sredraw_display); |
078b3696 | 6458 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6459 | defsubr (&Sopen_termscript); |
6460 | defsubr (&Sding); | |
7ba07a1a | 6461 | defsubr (&Sredisplay); |
4588ec20 JB |
6462 | defsubr (&Ssleep_for); |
6463 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6464 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6465 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6466 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6467 | |
e509cfa6 | 6468 | #ifdef GLYPH_DEBUG |
9b0e97aa GM |
6469 | defsubr (&Sdump_redisplay_history); |
6470 | #endif | |
6471 | ||
d1dad759 | 6472 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6473 | staticpro (&frame_and_buffer_state); |
6474 | ||
cd3520a4 JB |
6475 | DEFSYM (Qdisplay_table, "display-table"); |
6476 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6477 | |
29208e82 | 6478 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6479 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6480 | On most systems, changing this value will affect the amount of padding |
6481 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6482 | |
29208e82 | 6483 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6484 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6485 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6486 | |
29208e82 | 6487 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6488 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6489 | |
6490 | See also `ring-bell-function'. */); | |
177c0ea7 | 6491 | |
29208e82 | 6492 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6493 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6494 | A non-nil value is useful if the terminal can automatically preserve |
6495 | Emacs's frame display when you reenter Emacs. | |
6496 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6497 | |
29208e82 | 6498 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6499 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6500 | The value is a symbol: |
6501 | nil for a termcap frame (a character-only terminal), | |
6502 | 'x' for an Emacs frame that is really an X window, | |
6503 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6504 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6505 | 'pc' for a direct-write MS-DOS frame. | |
6506 | ||
6507 | Use of this variable as a boolean is deprecated. Instead, | |
6508 | use `display-graphic-p' or any of the other `display-*-p' | |
6509 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6510 | |
70b8d0a4 SM |
6511 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6512 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6513 | The value is a symbol: |
6514 | nil for a termcap frame (a character-only terminal), | |
6515 | 'x' for an Emacs frame that is really an X window, | |
6516 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6517 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6518 | 'pc' for a direct-write MS-DOS frame. | |
6519 | ||
6520 | Use of this variable as a boolean is deprecated. Instead, | |
6521 | use `display-graphic-p' or any of the other `display-*-p' | |
6522 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6523 | |
29208e82 | 6524 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6525 | doc: /* The version number of the window system in use. |
c22140f6 | 6526 | For X windows, this is 11. */); |
177c0ea7 | 6527 | |
29208e82 | 6528 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6529 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6530 | |
29208e82 | 6531 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6532 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6533 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6534 | Each element can be: | |
6535 | integer: a glyph code which this glyph is an alias for. | |
6536 | string: output this glyph using that string (not impl. in X windows). | |
6537 | nil: this glyph mod 524288 is the code of a character to output, | |
6538 | and this glyph / 524288 is the face number (see `face-id') to use | |
6539 | while outputting it. */); | |
4588ec20 JB |
6540 | Vglyph_table = Qnil; |
6541 | ||
29208e82 | 6542 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6543 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6544 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6545 | Vstandard_display_table = Qnil; |
6546 | ||
29208e82 | 6547 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6548 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6549 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6550 | |
d012c62b | 6551 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6552 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6553 | doc: /* Period in seconds between checking for input during redisplay. |
6554 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6555 | case, arriving input preempts redisplay until the input is processed. | |
6556 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6557 | Vredisplay_preemption_period = make_float (0.10); |
6558 | #endif | |
6559 | ||
4588ec20 JB |
6560 | #ifdef CANNOT_DUMP |
6561 | if (noninteractive) | |
6562 | #endif | |
6563 | { | |
2246281f | 6564 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6565 | Vwindow_system_version = Qnil; |
6566 | } | |
6567 | } |