Commit | Line | Data |
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4588ec20 | 1 | /* Updating of data structures for redisplay. |
acaf905b | 2 | Copyright (C) 1985-1988, 1993-1995, 1997-2012 Free Software Foundation, Inc. |
4588ec20 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
4588ec20 | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
4588ec20 JB |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4588ec20 | 18 | |
18160b98 | 19 | #include <config.h> |
68c45bf0 | 20 | #include <signal.h> |
565620a5 | 21 | #include <stdio.h> |
4588ec20 | 22 | #include <ctype.h> |
d7306fe6 | 23 | #include <setjmp.h> |
dfcf069d | 24 | #include <unistd.h> |
dfcf069d | 25 | |
47099d6f | 26 | #include "lisp.h" |
4588ec20 JB |
27 | #include "termchar.h" |
28 | #include "termopts.h" | |
a0879520 | 29 | /* cm.h must come after dispextern.h on Windows. */ |
fd2e066a GV |
30 | #include "dispextern.h" |
31 | #include "cm.h" | |
4588ec20 | 32 | #include "buffer.h" |
83be827a | 33 | #include "character.h" |
d43721a2 | 34 | #include "keyboard.h" |
502b9b64 | 35 | #include "frame.h" |
428a555e | 36 | #include "termhooks.h" |
4588ec20 JB |
37 | #include "window.h" |
38 | #include "commands.h" | |
39 | #include "disptab.h" | |
40 | #include "indent.h" | |
d169fe39 | 41 | #include "intervals.h" |
97cf50e7 | 42 | #include "blockinput.h" |
dfcf069d | 43 | #include "process.h" |
4588ec20 | 44 | |
58b2bb63 | 45 | #include "syssignal.h" |
a41f8bed | 46 | |
4588ec20 JB |
47 | #ifdef HAVE_X_WINDOWS |
48 | #include "xterm.h" | |
5f5c8ee5 | 49 | #endif /* HAVE_X_WINDOWS */ |
4588ec20 | 50 | |
fd2e066a GV |
51 | #ifdef HAVE_NTGUI |
52 | #include "w32term.h" | |
53 | #endif /* HAVE_NTGUI */ | |
54 | ||
edfda783 AR |
55 | #ifdef HAVE_NS |
56 | #include "nsterm.h" | |
57 | #endif | |
58 | ||
5f5c8ee5 | 59 | /* Include systime.h after xterm.h to avoid double inclusion of time.h. */ |
6cbd1643 | 60 | |
5f5c8ee5 | 61 | #include "systime.h" |
3883a901 RS |
62 | #include <errno.h> |
63 | ||
4588ec20 | 64 | /* Get number of chars of output now in the buffer of a stdio stream. |
5a5fa834 | 65 | This ought to be built in stdio, but it isn't. Some s- files |
5f5c8ee5 GM |
66 | override this because their stdio internals differ. */ |
67 | ||
e3271ae5 | 68 | #ifdef __GNU_LIBRARY__ |
5f5c8ee5 GM |
69 | |
70 | /* The s- file might have overridden the definition with one that | |
71 | works for the system's C library. But we are using the GNU C | |
72 | library, so this is the right definition for every system. */ | |
73 | ||
3883a901 RS |
74 | #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT |
75 | #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT | |
76 | #else | |
cb5558ff | 77 | #undef PENDING_OUTPUT_COUNT |
e3271ae5 | 78 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer) |
3883a901 RS |
79 | #endif |
80 | #else /* not __GNU_LIBRARY__ */ | |
68c45bf0 PE |
81 | #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING |
82 | #include <stdio_ext.h> | |
83 | #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE) | |
84 | #endif | |
cb5558ff | 85 | #ifndef PENDING_OUTPUT_COUNT |
4588ec20 JB |
86 | #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base) |
87 | #endif | |
5f5c8ee5 GM |
88 | #endif /* not __GNU_LIBRARY__ */ |
89 | ||
5e617bc2 | 90 | #if defined (HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
fa0ec9f4 DL |
91 | #include <term.h> /* for tgetent */ |
92 | #endif | |
5f5c8ee5 GM |
93 | \f |
94 | /* Structure to pass dimensions around. Used for character bounding | |
95 | boxes, glyph matrix dimensions and alike. */ | |
96 | ||
97 | struct dim | |
98 | { | |
99 | int width; | |
100 | int height; | |
101 | }; | |
102 | ||
103 | \f | |
104 | /* Function prototypes. */ | |
105 | ||
f57e2426 | 106 | static void update_frame_line (struct frame *, int); |
2f7c71a1 AS |
107 | static int required_matrix_height (struct window *); |
108 | static int required_matrix_width (struct window *); | |
f57e2426 | 109 | static void adjust_frame_glyphs (struct frame *); |
f57e2426 | 110 | static void change_frame_size_1 (struct frame *, int, int, int, int, int); |
5bf46f05 | 111 | static void increment_row_positions (struct glyph_row *, EMACS_INT, EMACS_INT); |
f57e2426 J |
112 | static void fill_up_frame_row_with_spaces (struct glyph_row *, int); |
113 | static void build_frame_matrix_from_window_tree (struct glyph_matrix *, | |
114 | struct window *); | |
115 | static void build_frame_matrix_from_leaf_window (struct glyph_matrix *, | |
116 | struct window *); | |
f57e2426 J |
117 | static void adjust_frame_message_buffer (struct frame *); |
118 | static void adjust_decode_mode_spec_buffer (struct frame *); | |
119 | static void fill_up_glyph_row_with_spaces (struct glyph_row *); | |
f57e2426 J |
120 | static void clear_window_matrices (struct window *, int); |
121 | static void fill_up_glyph_row_area_with_spaces (struct glyph_row *, int); | |
122 | static int scrolling_window (struct window *, int); | |
123 | static int update_window_line (struct window *, int, int *); | |
f57e2426 | 124 | static void mirror_make_current (struct window *, int); |
b96fd3e8 | 125 | #if GLYPH_DEBUG |
f57e2426 J |
126 | static void check_matrix_pointers (struct glyph_matrix *, |
127 | struct glyph_matrix *); | |
b96fd3e8 | 128 | #endif |
f57e2426 J |
129 | static void mirror_line_dance (struct window *, int, int, int *, char *); |
130 | static int update_window_tree (struct window *, int); | |
131 | static int update_window (struct window *, int); | |
132 | static int update_frame_1 (struct frame *, int, int); | |
5bf46f05 | 133 | static int scrolling (struct frame *); |
f57e2426 | 134 | static void set_window_cursor_after_update (struct window *); |
f57e2426 J |
135 | static void adjust_frame_glyphs_for_window_redisplay (struct frame *); |
136 | static void adjust_frame_glyphs_for_frame_redisplay (struct frame *); | |
5f5c8ee5 | 137 | |
5f5c8ee5 | 138 | \f |
d012c62b KS |
139 | /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers |
140 | are supported, so we can check for input during redisplay at | |
141 | regular intervals. */ | |
142 | #ifdef EMACS_HAS_USECS | |
143 | #define PERIODIC_PREEMPTION_CHECKING 1 | |
144 | #else | |
145 | #define PERIODIC_PREEMPTION_CHECKING 0 | |
146 | #endif | |
147 | ||
148 | #if PERIODIC_PREEMPTION_CHECKING | |
149 | ||
d012c62b KS |
150 | /* Redisplay preemption timers. */ |
151 | ||
152 | static EMACS_TIME preemption_period; | |
153 | static EMACS_TIME preemption_next_check; | |
154 | ||
155 | #endif | |
156 | ||
a41f8bed | 157 | /* Nonzero upon entry to redisplay means do not assume anything about |
502b9b64 | 158 | current contents of actual terminal frame; clear and redraw it. */ |
4588ec20 | 159 | |
502b9b64 | 160 | int frame_garbaged; |
4588ec20 | 161 | |
5f5c8ee5 | 162 | /* Nonzero means last display completed. Zero means it was preempted. */ |
4588ec20 JB |
163 | |
164 | int display_completed; | |
165 | ||
e7067d00 | 166 | Lisp_Object Qdisplay_table, Qredisplay_dont_pause; |
5f5c8ee5 | 167 | |
4588ec20 | 168 | \f |
5f5c8ee5 | 169 | /* The currently selected frame. In a single-frame version, this |
91fb7e1b | 170 | variable always equals the_only_frame. */ |
4588ec20 | 171 | |
91fb7e1b | 172 | Lisp_Object selected_frame; |
4588ec20 | 173 | |
5f5c8ee5 | 174 | /* A frame which is not just a mini-buffer, or 0 if there are no such |
502b9b64 | 175 | frames. This is usually the most recent such frame that was |
87485d6f MW |
176 | selected. In a single-frame version, this variable always holds |
177 | the address of the_only_frame. */ | |
4588ec20 | 178 | |
5f5c8ee5 | 179 | struct frame *last_nonminibuf_frame; |
d52bad65 | 180 | |
5f5c8ee5 | 181 | /* 1 means SIGWINCH happened when not safe. */ |
4588ec20 | 182 | |
5bf46f05 | 183 | static int delayed_size_change; |
4588ec20 | 184 | |
5f5c8ee5 | 185 | /* 1 means glyph initialization has been completed at startup. */ |
4588ec20 | 186 | |
5f5c8ee5 | 187 | static int glyphs_initialized_initially_p; |
4588ec20 | 188 | |
5f5c8ee5 | 189 | /* Updated window if != 0. Set by update_window. */ |
4588ec20 | 190 | |
5f5c8ee5 | 191 | struct window *updated_window; |
4588ec20 | 192 | |
5f5c8ee5 | 193 | /* Glyph row updated in update_window_line, and area that is updated. */ |
4588ec20 | 194 | |
5f5c8ee5 GM |
195 | struct glyph_row *updated_row; |
196 | int updated_area; | |
4588ec20 | 197 | |
5f5c8ee5 | 198 | /* A glyph for a space. */ |
4588ec20 | 199 | |
5f5c8ee5 | 200 | struct glyph space_glyph; |
4588ec20 | 201 | |
5f5c8ee5 GM |
202 | /* Counts of allocated structures. These counts serve to diagnose |
203 | memory leaks and double frees. */ | |
4588ec20 | 204 | |
5bf46f05 PE |
205 | static int glyph_matrix_count; |
206 | static int glyph_pool_count; | |
4588ec20 | 207 | |
5f5c8ee5 GM |
208 | /* If non-null, the frame whose frame matrices are manipulated. If |
209 | null, window matrices are worked on. */ | |
4588ec20 | 210 | |
5f5c8ee5 | 211 | static struct frame *frame_matrix_frame; |
4588ec20 | 212 | |
5f5c8ee5 GM |
213 | /* Non-zero means that fonts have been loaded since the last glyph |
214 | matrix adjustments. Redisplay must stop, and glyph matrices must | |
215 | be adjusted when this flag becomes non-zero during display. The | |
216 | reason fonts can be loaded so late is that fonts of fontsets are | |
3aa9f0c4 KH |
217 | loaded on demand. Another reason is that a line contains many |
218 | characters displayed by zero width or very narrow glyphs of | |
219 | variable-width fonts. */ | |
836d2cde | 220 | |
5f5c8ee5 | 221 | int fonts_changed_p; |
836d2cde | 222 | |
177c0ea7 | 223 | /* Convert vpos and hpos from frame to window and vice versa. |
5f5c8ee5 | 224 | This may only be used for terminal frames. */ |
836d2cde | 225 | |
5f5c8ee5 | 226 | #if GLYPH_DEBUG |
4588ec20 | 227 | |
f57e2426 J |
228 | static int window_to_frame_vpos (struct window *, int); |
229 | static int window_to_frame_hpos (struct window *, int); | |
5f5c8ee5 GM |
230 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS)) |
231 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS)) | |
4588ec20 | 232 | |
9b0e97aa GM |
233 | /* One element of the ring buffer containing redisplay history |
234 | information. */ | |
235 | ||
236 | struct redisplay_history | |
237 | { | |
238 | char trace[512 + 100]; | |
239 | }; | |
240 | ||
241 | /* The size of the history buffer. */ | |
242 | ||
243 | #define REDISPLAY_HISTORY_SIZE 30 | |
244 | ||
245 | /* The redisplay history buffer. */ | |
246 | ||
247 | static struct redisplay_history redisplay_history[REDISPLAY_HISTORY_SIZE]; | |
248 | ||
249 | /* Next free entry in redisplay_history. */ | |
250 | ||
251 | static int history_idx; | |
252 | ||
253 | /* A tick that's incremented each time something is added to the | |
254 | history. */ | |
255 | ||
dfd153ae | 256 | static uprintmax_t history_tick; |
9b0e97aa | 257 | |
f57e2426 | 258 | static void add_frame_display_history (struct frame *, int); |
6a8aec41 | 259 | \f |
9b0e97aa GM |
260 | /* Add to the redisplay history how window W has been displayed. |
261 | MSG is a trace containing the information how W's glyph matrix | |
153a073c | 262 | has been constructed. PAUSED_P non-zero means that the update |
9b0e97aa GM |
263 | has been interrupted for pending input. */ |
264 | ||
265 | static void | |
c56e0fd5 | 266 | add_window_display_history (struct window *w, const char *msg, int paused_p) |
9b0e97aa GM |
267 | { |
268 | char *buf; | |
177c0ea7 | 269 | |
9b0e97aa GM |
270 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
271 | history_idx = 0; | |
272 | buf = redisplay_history[history_idx].trace; | |
273 | ++history_idx; | |
177c0ea7 | 274 | |
8666506e PE |
275 | snprintf (buf, sizeof redisplay_history[0].trace, |
276 | "%"pMu": window %p (`%s')%s\n%s", | |
277 | history_tick++, | |
278 | w, | |
279 | ((BUFFERP (w->buffer) | |
280 | && STRINGP (BVAR (XBUFFER (w->buffer), name))) | |
281 | ? SSDATA (BVAR (XBUFFER (w->buffer), name)) | |
282 | : "???"), | |
283 | paused_p ? " ***paused***" : "", | |
284 | msg); | |
9b0e97aa GM |
285 | } |
286 | ||
287 | ||
288 | /* Add to the redisplay history that frame F has been displayed. | |
289 | PAUSED_P non-zero means that the update has been interrupted for | |
290 | pending input. */ | |
291 | ||
292 | static void | |
59fc5cf9 | 293 | add_frame_display_history (struct frame *f, int paused_p) |
9b0e97aa GM |
294 | { |
295 | char *buf; | |
177c0ea7 | 296 | |
9b0e97aa GM |
297 | if (history_idx >= REDISPLAY_HISTORY_SIZE) |
298 | history_idx = 0; | |
299 | buf = redisplay_history[history_idx].trace; | |
300 | ++history_idx; | |
177c0ea7 | 301 | |
dfd153ae | 302 | sprintf (buf, "%"pMu": update frame %p%s", |
9b0e97aa GM |
303 | history_tick++, |
304 | f, paused_p ? " ***paused***" : ""); | |
305 | } | |
306 | ||
307 | ||
a7ca3326 | 308 | DEFUN ("dump-redisplay-history", Fdump_redisplay_history, |
9b0e97aa | 309 | Sdump_redisplay_history, 0, 0, "", |
7ee72033 | 310 | doc: /* Dump redisplay history to stderr. */) |
5842a27b | 311 | (void) |
9b0e97aa GM |
312 | { |
313 | int i; | |
314 | ||
315 | for (i = history_idx - 1; i != history_idx; --i) | |
316 | { | |
317 | if (i < 0) | |
318 | i = REDISPLAY_HISTORY_SIZE - 1; | |
319 | fprintf (stderr, "%s\n", redisplay_history[i].trace); | |
320 | } | |
321 | ||
322 | return Qnil; | |
323 | } | |
324 | ||
325 | ||
5f5c8ee5 | 326 | #else /* GLYPH_DEBUG == 0 */ |
4588ec20 | 327 | |
7df02016 KS |
328 | #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W)) |
329 | #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W)) | |
4588ec20 | 330 | |
5f5c8ee5 | 331 | #endif /* GLYPH_DEBUG == 0 */ |
4588ec20 | 332 | |
4588ec20 | 333 | |
dcc19aac | 334 | #if defined PROFILING && !HAVE___EXECUTABLE_START |
72af86bd | 335 | /* FIXME: only used to find text start for profiling. */ |
4588ec20 JB |
336 | |
337 | void | |
971de7fb | 338 | safe_bcopy (const char *from, char *to, int size) |
4588ec20 | 339 | { |
72af86bd | 340 | abort (); |
177c0ea7 | 341 | } |
72af86bd | 342 | #endif |
5f5c8ee5 GM |
343 | \f |
344 | /*********************************************************************** | |
345 | Glyph Matrices | |
346 | ***********************************************************************/ | |
347 | ||
348 | /* Allocate and return a glyph_matrix structure. POOL is the glyph | |
349 | pool from which memory for the matrix should be allocated, or null | |
350 | for window-based redisplay where no glyph pools are used. The | |
351 | member `pool' of the glyph matrix structure returned is set to | |
352 | POOL, the structure is otherwise zeroed. */ | |
353 | ||
5bf46f05 | 354 | static struct glyph_matrix * |
971de7fb | 355 | new_glyph_matrix (struct glyph_pool *pool) |
4588ec20 | 356 | { |
5f5c8ee5 GM |
357 | struct glyph_matrix *result; |
358 | ||
359 | /* Allocate and clear. */ | |
360 | result = (struct glyph_matrix *) xmalloc (sizeof *result); | |
72af86bd | 361 | memset (result, 0, sizeof *result); |
4588ec20 | 362 | |
5f5c8ee5 GM |
363 | /* Increment number of allocated matrices. This count is used |
364 | to detect memory leaks. */ | |
365 | ++glyph_matrix_count; | |
4588ec20 | 366 | |
5f5c8ee5 GM |
367 | /* Set pool and return. */ |
368 | result->pool = pool; | |
369 | return result; | |
4588ec20 JB |
370 | } |
371 | ||
4588ec20 | 372 | |
5f5c8ee5 GM |
373 | /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed. |
374 | ||
375 | The global counter glyph_matrix_count is decremented when a matrix | |
376 | is freed. If the count gets negative, more structures were freed | |
377 | than allocated, i.e. one matrix was freed more than once or a bogus | |
378 | pointer was passed to this function. | |
177c0ea7 | 379 | |
5f5c8ee5 GM |
380 | If MATRIX->pool is null, this means that the matrix manages its own |
381 | glyph memory---this is done for matrices on X frames. Freeing the | |
382 | matrix also frees the glyph memory in this case. */ | |
383 | ||
384 | static void | |
971de7fb | 385 | free_glyph_matrix (struct glyph_matrix *matrix) |
4588ec20 | 386 | { |
5f5c8ee5 GM |
387 | if (matrix) |
388 | { | |
389 | int i; | |
390 | ||
391 | /* Detect the case that more matrices are freed than were | |
392 | allocated. */ | |
393 | if (--glyph_matrix_count < 0) | |
394 | abort (); | |
395 | ||
396 | /* Free glyph memory if MATRIX owns it. */ | |
397 | if (matrix->pool == NULL) | |
398 | for (i = 0; i < matrix->rows_allocated; ++i) | |
399 | xfree (matrix->rows[i].glyphs[LEFT_MARGIN_AREA]); | |
177c0ea7 | 400 | |
5f5c8ee5 GM |
401 | /* Free row structures and the matrix itself. */ |
402 | xfree (matrix->rows); | |
403 | xfree (matrix); | |
404 | } | |
405 | } | |
4588ec20 | 406 | |
4588ec20 | 407 | |
5f5c8ee5 GM |
408 | /* Return the number of glyphs to reserve for a marginal area of |
409 | window W. TOTAL_GLYPHS is the number of glyphs in a complete | |
410 | display line of window W. MARGIN gives the width of the marginal | |
411 | area in canonical character units. MARGIN should be an integer | |
412 | or a float. */ | |
413 | ||
414 | static int | |
971de7fb | 415 | margin_glyphs_to_reserve (struct window *w, int total_glyphs, Lisp_Object margin) |
5f5c8ee5 GM |
416 | { |
417 | int n; | |
4588ec20 | 418 | |
5f5c8ee5 | 419 | if (NUMBERP (margin)) |
4588ec20 | 420 | { |
7df02016 | 421 | int width = XFASTINT (w->total_cols); |
5f5c8ee5 GM |
422 | double d = max (0, XFLOATINT (margin)); |
423 | d = min (width / 2 - 1, d); | |
35ec832e | 424 | n = (int) ((double) total_glyphs / width * d); |
5f5c8ee5 GM |
425 | } |
426 | else | |
427 | n = 0; | |
428 | ||
429 | return n; | |
430 | } | |
431 | ||
7a7270dd EZ |
432 | #if XASSERTS |
433 | /* Return non-zero if ROW's hash value is correct, zero if not. */ | |
7430c2a1 | 434 | int |
7a7270dd EZ |
435 | verify_row_hash (struct glyph_row *row) |
436 | { | |
015137db | 437 | return row->hash == row_hash (row); |
7a7270dd EZ |
438 | } |
439 | #endif | |
4588ec20 | 440 | |
5f5c8ee5 GM |
441 | /* Adjust glyph matrix MATRIX on window W or on a frame to changed |
442 | window sizes. | |
4588ec20 | 443 | |
5f5c8ee5 GM |
444 | W is null if the function is called for a frame glyph matrix. |
445 | Otherwise it is the window MATRIX is a member of. X and Y are the | |
446 | indices of the first column and row of MATRIX within the frame | |
447 | matrix, if such a matrix exists. They are zero for purely | |
448 | window-based redisplay. DIM is the needed size of the matrix. | |
d52bad65 | 449 | |
5f5c8ee5 GM |
450 | In window-based redisplay, where no frame matrices exist, glyph |
451 | matrices manage their own glyph storage. Otherwise, they allocate | |
452 | storage from a common frame glyph pool which can be found in | |
453 | MATRIX->pool. | |
23b0200c | 454 | |
5f5c8ee5 GM |
455 | The reason for this memory management strategy is to avoid complete |
456 | frame redraws if possible. When we allocate from a common pool, a | |
457 | change of the location or size of a sub-matrix within the pool | |
458 | requires a complete redisplay of the frame because we cannot easily | |
459 | make sure that the current matrices of all windows still agree with | |
460 | what is displayed on the screen. While this is usually fast, it | |
461 | leads to screen flickering. */ | |
23b0200c | 462 | |
5f5c8ee5 | 463 | static void |
971de7fb | 464 | adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y, struct dim dim) |
5f5c8ee5 GM |
465 | { |
466 | int i; | |
467 | int new_rows; | |
468 | int marginal_areas_changed_p = 0; | |
045dee35 GM |
469 | int header_line_changed_p = 0; |
470 | int header_line_p = 0; | |
5f5c8ee5 | 471 | int left = -1, right = -1; |
ca8a12a7 | 472 | int window_width = -1, window_height = -1; |
5f5c8ee5 | 473 | |
6b61353c KH |
474 | /* See if W had a header line that has disappeared now, or vice versa. |
475 | Get W's size. */ | |
5f5c8ee5 GM |
476 | if (w) |
477 | { | |
6b61353c KH |
478 | window_box (w, -1, 0, 0, &window_width, &window_height); |
479 | ||
045dee35 GM |
480 | header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
481 | header_line_changed_p = header_line_p != matrix->header_line_p; | |
5f5c8ee5 | 482 | } |
045dee35 | 483 | matrix->header_line_p = header_line_p; |
23b0200c | 484 | |
6b61353c KH |
485 | /* If POOL is null, MATRIX is a window matrix for window-based redisplay. |
486 | Do nothing if MATRIX' size, position, vscroll, and marginal areas | |
5f5c8ee5 GM |
487 | haven't changed. This optimization is important because preserving |
488 | the matrix means preventing redisplay. */ | |
489 | if (matrix->pool == NULL) | |
490 | { | |
7df02016 KS |
491 | left = margin_glyphs_to_reserve (w, dim.width, w->left_margin_cols); |
492 | right = margin_glyphs_to_reserve (w, dim.width, w->right_margin_cols); | |
5f5c8ee5 GM |
493 | xassert (left >= 0 && right >= 0); |
494 | marginal_areas_changed_p = (left != matrix->left_margin_glyphs | |
495 | || right != matrix->right_margin_glyphs); | |
496 | ||
497 | if (!marginal_areas_changed_p | |
498 | && !fonts_changed_p | |
045dee35 | 499 | && !header_line_changed_p |
7df02016 KS |
500 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
501 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
5f5c8ee5 GM |
502 | && matrix->window_height == window_height |
503 | && matrix->window_vscroll == w->vscroll | |
504 | && matrix->window_width == window_width) | |
505 | return; | |
506 | } | |
177c0ea7 | 507 | |
5f5c8ee5 GM |
508 | /* Enlarge MATRIX->rows if necessary. New rows are cleared. */ |
509 | if (matrix->rows_allocated < dim.height) | |
510 | { | |
0065d054 | 511 | int old_alloc = matrix->rows_allocated; |
5f5c8ee5 | 512 | new_rows = dim.height - matrix->rows_allocated; |
0065d054 PE |
513 | matrix->rows = xpalloc (matrix->rows, &matrix->rows_allocated, |
514 | new_rows, INT_MAX, sizeof *matrix->rows); | |
515 | memset (matrix->rows + old_alloc, 0, | |
516 | (matrix->rows_allocated - old_alloc) * sizeof *matrix->rows); | |
5f5c8ee5 GM |
517 | } |
518 | else | |
519 | new_rows = 0; | |
60a8948a | 520 | |
5f5c8ee5 GM |
521 | /* If POOL is not null, MATRIX is a frame matrix or a window matrix |
522 | on a frame not using window-based redisplay. Set up pointers for | |
523 | each row into the glyph pool. */ | |
524 | if (matrix->pool) | |
525 | { | |
526 | xassert (matrix->pool->glyphs); | |
177c0ea7 | 527 | |
5f5c8ee5 | 528 | if (w) |
60a8948a | 529 | { |
5f5c8ee5 | 530 | left = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 531 | w->left_margin_cols); |
5f5c8ee5 | 532 | right = margin_glyphs_to_reserve (w, dim.width, |
7df02016 | 533 | w->right_margin_cols); |
60a8948a | 534 | } |
5f5c8ee5 GM |
535 | else |
536 | left = right = 0; | |
177c0ea7 | 537 | |
5f5c8ee5 | 538 | for (i = 0; i < dim.height; ++i) |
60a8948a | 539 | { |
5f5c8ee5 | 540 | struct glyph_row *row = &matrix->rows[i]; |
177c0ea7 JB |
541 | |
542 | row->glyphs[LEFT_MARGIN_AREA] | |
5f5c8ee5 GM |
543 | = (matrix->pool->glyphs |
544 | + (y + i) * matrix->pool->ncolumns | |
545 | + x); | |
177c0ea7 | 546 | |
5f5c8ee5 GM |
547 | if (w == NULL |
548 | || row == matrix->rows + dim.height - 1 | |
045dee35 | 549 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
550 | { |
551 | row->glyphs[TEXT_AREA] | |
552 | = row->glyphs[LEFT_MARGIN_AREA]; | |
553 | row->glyphs[RIGHT_MARGIN_AREA] | |
554 | = row->glyphs[TEXT_AREA] + dim.width; | |
555 | row->glyphs[LAST_AREA] | |
556 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
557 | } | |
558 | else | |
559 | { | |
560 | row->glyphs[TEXT_AREA] | |
561 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
562 | row->glyphs[RIGHT_MARGIN_AREA] | |
563 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
564 | row->glyphs[LAST_AREA] | |
565 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
566 | } | |
60a8948a | 567 | } |
177c0ea7 | 568 | |
5f5c8ee5 GM |
569 | matrix->left_margin_glyphs = left; |
570 | matrix->right_margin_glyphs = right; | |
571 | } | |
572 | else | |
573 | { | |
574 | /* If MATRIX->pool is null, MATRIX is responsible for managing | |
6b61353c KH |
575 | its own memory. It is a window matrix for window-based redisplay. |
576 | Allocate glyph memory from the heap. */ | |
5f5c8ee5 GM |
577 | if (dim.width > matrix->matrix_w |
578 | || new_rows | |
045dee35 | 579 | || header_line_changed_p |
5f5c8ee5 | 580 | || marginal_areas_changed_p) |
4588ec20 | 581 | { |
5f5c8ee5 GM |
582 | struct glyph_row *row = matrix->rows; |
583 | struct glyph_row *end = row + matrix->rows_allocated; | |
177c0ea7 | 584 | |
5f5c8ee5 GM |
585 | while (row < end) |
586 | { | |
587 | row->glyphs[LEFT_MARGIN_AREA] | |
0065d054 PE |
588 | = xnrealloc (row->glyphs[LEFT_MARGIN_AREA], |
589 | dim.width, sizeof (struct glyph)); | |
177c0ea7 | 590 | |
5f5c8ee5 GM |
591 | /* The mode line never has marginal areas. */ |
592 | if (row == matrix->rows + dim.height - 1 | |
045dee35 | 593 | || (row == matrix->rows && matrix->header_line_p)) |
5f5c8ee5 GM |
594 | { |
595 | row->glyphs[TEXT_AREA] | |
596 | = row->glyphs[LEFT_MARGIN_AREA]; | |
597 | row->glyphs[RIGHT_MARGIN_AREA] | |
598 | = row->glyphs[TEXT_AREA] + dim.width; | |
599 | row->glyphs[LAST_AREA] | |
600 | = row->glyphs[RIGHT_MARGIN_AREA]; | |
601 | } | |
602 | else | |
603 | { | |
604 | row->glyphs[TEXT_AREA] | |
605 | = row->glyphs[LEFT_MARGIN_AREA] + left; | |
606 | row->glyphs[RIGHT_MARGIN_AREA] | |
607 | = row->glyphs[TEXT_AREA] + dim.width - left - right; | |
608 | row->glyphs[LAST_AREA] | |
609 | = row->glyphs[LEFT_MARGIN_AREA] + dim.width; | |
610 | } | |
611 | ++row; | |
612 | } | |
4588ec20 JB |
613 | } |
614 | ||
5f5c8ee5 GM |
615 | xassert (left >= 0 && right >= 0); |
616 | matrix->left_margin_glyphs = left; | |
617 | matrix->right_margin_glyphs = right; | |
618 | } | |
177c0ea7 | 619 | |
5f5c8ee5 GM |
620 | /* Number of rows to be used by MATRIX. */ |
621 | matrix->nrows = dim.height; | |
3ed36514 | 622 | xassert (matrix->nrows >= 0); |
5f5c8ee5 | 623 | |
b7b20fbd | 624 | if (w) |
5f5c8ee5 | 625 | { |
b7b20fbd | 626 | if (matrix == w->current_matrix) |
4588ec20 | 627 | { |
b7b20fbd GM |
628 | /* Mark rows in a current matrix of a window as not having |
629 | valid contents. It's important to not do this for | |
630 | desired matrices. When Emacs starts, it may already be | |
631 | building desired matrices when this function runs. */ | |
632 | if (window_width < 0) | |
633 | window_width = window_box_width (w, -1); | |
177c0ea7 | 634 | |
b7b20fbd GM |
635 | /* Optimize the case that only the height has changed (C-x 2, |
636 | upper window). Invalidate all rows that are no longer part | |
637 | of the window. */ | |
638 | if (!marginal_areas_changed_p | |
73d75a62 GM |
639 | && !header_line_changed_p |
640 | && new_rows == 0 | |
641 | && dim.width == matrix->matrix_w | |
7df02016 KS |
642 | && matrix->window_left_col == WINDOW_LEFT_EDGE_COL (w) |
643 | && matrix->window_top_line == WINDOW_TOP_EDGE_LINE (w) | |
73d75a62 | 644 | && matrix->window_width == window_width) |
b7b20fbd | 645 | { |
dd42b31a GM |
646 | /* Find the last row in the window. */ |
647 | for (i = 0; i < matrix->nrows && matrix->rows[i].enabled_p; ++i) | |
648 | if (MATRIX_ROW_BOTTOM_Y (matrix->rows + i) >= window_height) | |
649 | { | |
26447967 | 650 | ++i; |
dd42b31a GM |
651 | break; |
652 | } | |
b7b20fbd GM |
653 | |
654 | /* Window end is invalid, if inside of the rows that | |
dd42b31a | 655 | are invalidated below. */ |
b7b20fbd GM |
656 | if (INTEGERP (w->window_end_vpos) |
657 | && XFASTINT (w->window_end_vpos) >= i) | |
658 | w->window_end_valid = Qnil; | |
177c0ea7 | 659 | |
b7b20fbd GM |
660 | while (i < matrix->nrows) |
661 | matrix->rows[i++].enabled_p = 0; | |
662 | } | |
663 | else | |
664 | { | |
665 | for (i = 0; i < matrix->nrows; ++i) | |
666 | matrix->rows[i].enabled_p = 0; | |
667 | } | |
5f5c8ee5 | 668 | } |
b7b20fbd | 669 | else if (matrix == w->desired_matrix) |
5f5c8ee5 | 670 | { |
b7b20fbd GM |
671 | /* Rows in desired matrices always have to be cleared; |
672 | redisplay expects this is the case when it runs, so it | |
673 | had better be the case when we adjust matrices between | |
674 | redisplays. */ | |
5f5c8ee5 GM |
675 | for (i = 0; i < matrix->nrows; ++i) |
676 | matrix->rows[i].enabled_p = 0; | |
4588ec20 | 677 | } |
4588ec20 | 678 | } |
177c0ea7 JB |
679 | |
680 | ||
5f5c8ee5 GM |
681 | /* Remember last values to be able to optimize frame redraws. */ |
682 | matrix->matrix_x = x; | |
683 | matrix->matrix_y = y; | |
684 | matrix->matrix_w = dim.width; | |
685 | matrix->matrix_h = dim.height; | |
686 | ||
687 | /* Record the top y location and height of W at the time the matrix | |
688 | was last adjusted. This is used to optimize redisplay above. */ | |
689 | if (w) | |
4588ec20 | 690 | { |
7df02016 KS |
691 | matrix->window_left_col = WINDOW_LEFT_EDGE_COL (w); |
692 | matrix->window_top_line = WINDOW_TOP_EDGE_LINE (w); | |
5f5c8ee5 GM |
693 | matrix->window_height = window_height; |
694 | matrix->window_width = window_width; | |
695 | matrix->window_vscroll = w->vscroll; | |
696 | } | |
697 | } | |
4588ec20 | 698 | |
4588ec20 | 699 | |
5f5c8ee5 GM |
700 | /* Reverse the contents of rows in MATRIX between START and END. The |
701 | contents of the row at END - 1 end up at START, END - 2 at START + | |
702 | 1 etc. This is part of the implementation of rotate_matrix (see | |
703 | below). */ | |
d52bad65 | 704 | |
5f5c8ee5 | 705 | static void |
971de7fb | 706 | reverse_rows (struct glyph_matrix *matrix, int start, int end) |
5f5c8ee5 GM |
707 | { |
708 | int i, j; | |
23b0200c | 709 | |
5f5c8ee5 GM |
710 | for (i = start, j = end - 1; i < j; ++i, --j) |
711 | { | |
712 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
713 | initialization. */ | |
714 | struct glyph_row temp; | |
715 | temp = matrix->rows[i]; | |
716 | matrix->rows[i] = matrix->rows[j]; | |
717 | matrix->rows[j] = temp; | |
718 | } | |
719 | } | |
23b0200c | 720 | |
23b0200c | 721 | |
5f5c8ee5 GM |
722 | /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST - |
723 | 1 by BY positions. BY < 0 means rotate left, i.e. towards lower | |
724 | indices. (Note: this does not copy glyphs, only glyph pointers in | |
725 | row structures are moved around). | |
60a8948a | 726 | |
5f5c8ee5 GM |
727 | The algorithm used for rotating the vector was, I believe, first |
728 | described by Kernighan. See the vector R as consisting of two | |
729 | sub-vectors AB, where A has length BY for BY >= 0. The result | |
730 | after rotating is then BA. Reverse both sub-vectors to get ArBr | |
731 | and reverse the result to get (ArBr)r which is BA. Similar for | |
732 | rotating right. */ | |
733 | ||
734 | void | |
971de7fb | 735 | rotate_matrix (struct glyph_matrix *matrix, int first, int last, int by) |
5f5c8ee5 GM |
736 | { |
737 | if (by < 0) | |
738 | { | |
739 | /* Up (rotate left, i.e. towards lower indices). */ | |
740 | by = -by; | |
741 | reverse_rows (matrix, first, first + by); | |
742 | reverse_rows (matrix, first + by, last); | |
743 | reverse_rows (matrix, first, last); | |
744 | } | |
745 | else if (by > 0) | |
746 | { | |
747 | /* Down (rotate right, i.e. towards higher indices). */ | |
748 | reverse_rows (matrix, last - by, last); | |
749 | reverse_rows (matrix, first, last - by); | |
750 | reverse_rows (matrix, first, last); | |
751 | } | |
752 | } | |
753 | ||
754 | ||
755 | /* Increment buffer positions in glyph rows of MATRIX. Do it for rows | |
756 | with indices START <= index < END. Increment positions by DELTA/ | |
757 | DELTA_BYTES. */ | |
758 | ||
759 | void | |
ace1712c EZ |
760 | increment_matrix_positions (struct glyph_matrix *matrix, int start, int end, |
761 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
762 | { |
763 | /* Check that START and END are reasonable values. */ | |
764 | xassert (start >= 0 && start <= matrix->nrows); | |
765 | xassert (end >= 0 && end <= matrix->nrows); | |
766 | xassert (start <= end); | |
767 | ||
768 | for (; start < end; ++start) | |
86c11ba1 | 769 | increment_row_positions (matrix->rows + start, delta, delta_bytes); |
5f5c8ee5 GM |
770 | } |
771 | ||
772 | ||
773 | /* Enable a range of rows in glyph matrix MATRIX. START and END are | |
774 | the row indices of the first and last + 1 row to enable. If | |
775 | ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */ | |
776 | ||
777 | void | |
971de7fb | 778 | enable_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end, int enabled_p) |
5f5c8ee5 | 779 | { |
3ed36514 GM |
780 | xassert (start <= end); |
781 | xassert (start >= 0 && start < matrix->nrows); | |
782 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 783 | |
5f5c8ee5 GM |
784 | for (; start < end; ++start) |
785 | matrix->rows[start].enabled_p = enabled_p != 0; | |
786 | } | |
787 | ||
788 | ||
789 | /* Clear MATRIX. | |
790 | ||
791 | This empties all rows in MATRIX by setting the enabled_p flag for | |
792 | all rows of the matrix to zero. The function prepare_desired_row | |
793 | will eventually really clear a row when it sees one with a zero | |
794 | enabled_p flag. | |
795 | ||
796 | Resets update hints to defaults value. The only update hint | |
797 | currently present is the flag MATRIX->no_scrolling_p. */ | |
798 | ||
799 | void | |
971de7fb | 800 | clear_glyph_matrix (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
801 | { |
802 | if (matrix) | |
803 | { | |
804 | enable_glyph_matrix_rows (matrix, 0, matrix->nrows, 0); | |
805 | matrix->no_scrolling_p = 0; | |
806 | } | |
807 | } | |
177c0ea7 | 808 | |
5f5c8ee5 GM |
809 | |
810 | /* Shift part of the glyph matrix MATRIX of window W up or down. | |
811 | Increment y-positions in glyph rows between START and END by DY, | |
812 | and recompute their visible height. */ | |
813 | ||
814 | void | |
971de7fb | 815 | shift_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int start, int end, int dy) |
5f5c8ee5 GM |
816 | { |
817 | int min_y, max_y; | |
177c0ea7 | 818 | |
5f5c8ee5 GM |
819 | xassert (start <= end); |
820 | xassert (start >= 0 && start < matrix->nrows); | |
821 | xassert (end >= 0 && end <= matrix->nrows); | |
177c0ea7 | 822 | |
7df02016 KS |
823 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
824 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 825 | |
5f5c8ee5 GM |
826 | for (; start < end; ++start) |
827 | { | |
828 | struct glyph_row *row = &matrix->rows[start]; | |
177c0ea7 | 829 | |
5f5c8ee5 | 830 | row->y += dy; |
d6c747a4 | 831 | row->visible_height = row->height; |
177c0ea7 | 832 | |
5f5c8ee5 | 833 | if (row->y < min_y) |
d6c747a4 GM |
834 | row->visible_height -= min_y - row->y; |
835 | if (row->y + row->height > max_y) | |
836 | row->visible_height -= row->y + row->height - max_y; | |
e61124cd YM |
837 | if (row->fringe_bitmap_periodic_p) |
838 | row->redraw_fringe_bitmaps_p = 1; | |
5f5c8ee5 GM |
839 | } |
840 | } | |
841 | ||
842 | ||
843 | /* Mark all rows in current matrices of frame F as invalid. Marking | |
844 | invalid is done by setting enabled_p to zero for all rows in a | |
845 | current matrix. */ | |
846 | ||
847 | void | |
971de7fb | 848 | clear_current_matrices (register struct frame *f) |
5f5c8ee5 GM |
849 | { |
850 | /* Clear frame current matrix, if we have one. */ | |
851 | if (f->current_matrix) | |
852 | clear_glyph_matrix (f->current_matrix); | |
853 | ||
854 | /* Clear the matrix of the menu bar window, if such a window exists. | |
855 | The menu bar window is currently used to display menus on X when | |
856 | no toolkit support is compiled in. */ | |
857 | if (WINDOWP (f->menu_bar_window)) | |
858 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->current_matrix); | |
859 | ||
9ea173e8 GM |
860 | /* Clear the matrix of the tool-bar window, if any. */ |
861 | if (WINDOWP (f->tool_bar_window)) | |
862 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix); | |
5f5c8ee5 GM |
863 | |
864 | /* Clear current window matrices. */ | |
865 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
866 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 0); | |
867 | } | |
868 | ||
869 | ||
870 | /* Clear out all display lines of F for a coming redisplay. */ | |
871 | ||
872 | void | |
971de7fb | 873 | clear_desired_matrices (register struct frame *f) |
5f5c8ee5 GM |
874 | { |
875 | if (f->desired_matrix) | |
876 | clear_glyph_matrix (f->desired_matrix); | |
177c0ea7 | 877 | |
5f5c8ee5 GM |
878 | if (WINDOWP (f->menu_bar_window)) |
879 | clear_glyph_matrix (XWINDOW (f->menu_bar_window)->desired_matrix); | |
880 | ||
9ea173e8 GM |
881 | if (WINDOWP (f->tool_bar_window)) |
882 | clear_glyph_matrix (XWINDOW (f->tool_bar_window)->desired_matrix); | |
5f5c8ee5 GM |
883 | |
884 | /* Do it for window matrices. */ | |
885 | xassert (WINDOWP (FRAME_ROOT_WINDOW (f))); | |
886 | clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
887 | } | |
888 | ||
889 | ||
890 | /* Clear matrices in window tree rooted in W. If DESIRED_P is | |
891 | non-zero clear desired matrices, otherwise clear current matrices. */ | |
892 | ||
893 | static void | |
971de7fb | 894 | clear_window_matrices (struct window *w, int desired_p) |
5f5c8ee5 GM |
895 | { |
896 | while (w) | |
897 | { | |
898 | if (!NILP (w->hchild)) | |
899 | { | |
900 | xassert (WINDOWP (w->hchild)); | |
901 | clear_window_matrices (XWINDOW (w->hchild), desired_p); | |
902 | } | |
903 | else if (!NILP (w->vchild)) | |
904 | { | |
905 | xassert (WINDOWP (w->vchild)); | |
906 | clear_window_matrices (XWINDOW (w->vchild), desired_p); | |
907 | } | |
908 | else | |
909 | { | |
910 | if (desired_p) | |
911 | clear_glyph_matrix (w->desired_matrix); | |
912 | else | |
913 | { | |
914 | clear_glyph_matrix (w->current_matrix); | |
915 | w->window_end_valid = Qnil; | |
916 | } | |
917 | } | |
918 | ||
919 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
920 | } | |
921 | } | |
922 | ||
923 | ||
924 | \f | |
925 | /*********************************************************************** | |
926 | Glyph Rows | |
927 | ||
928 | See dispextern.h for an overall explanation of glyph rows. | |
929 | ***********************************************************************/ | |
930 | ||
931 | /* Clear glyph row ROW. Do it in a way that makes it robust against | |
932 | changes in the glyph_row structure, i.e. addition or removal of | |
933 | structure members. */ | |
934 | ||
2cca872d KH |
935 | static struct glyph_row null_row; |
936 | ||
5f5c8ee5 | 937 | void |
971de7fb | 938 | clear_glyph_row (struct glyph_row *row) |
5f5c8ee5 GM |
939 | { |
940 | struct glyph *p[1 + LAST_AREA]; | |
5f5c8ee5 GM |
941 | |
942 | /* Save pointers. */ | |
943 | p[LEFT_MARGIN_AREA] = row->glyphs[LEFT_MARGIN_AREA]; | |
944 | p[TEXT_AREA] = row->glyphs[TEXT_AREA]; | |
945 | p[RIGHT_MARGIN_AREA] = row->glyphs[RIGHT_MARGIN_AREA]; | |
946 | p[LAST_AREA] = row->glyphs[LAST_AREA]; | |
947 | ||
948 | /* Clear. */ | |
949 | *row = null_row; | |
950 | ||
951 | /* Restore pointers. */ | |
952 | row->glyphs[LEFT_MARGIN_AREA] = p[LEFT_MARGIN_AREA]; | |
953 | row->glyphs[TEXT_AREA] = p[TEXT_AREA]; | |
954 | row->glyphs[RIGHT_MARGIN_AREA] = p[RIGHT_MARGIN_AREA]; | |
955 | row->glyphs[LAST_AREA] = p[LAST_AREA]; | |
45560b1a GM |
956 | |
957 | #if 0 /* At some point, some bit-fields of struct glyph were not set, | |
958 | which made glyphs unequal when compared with GLYPH_EQUAL_P. | |
959 | Redisplay outputs such glyphs, and flickering effects were | |
960 | the result. This also depended on the contents of memory | |
961 | returned by xmalloc. If flickering happens again, activate | |
153a073c | 962 | the code below. If the flickering is gone with that, chances |
45560b1a | 963 | are that the flickering has the same reason as here. */ |
72af86bd | 964 | memset (p[0], 0, (char *) p[LAST_AREA] - (char *) p[0]); |
45560b1a | 965 | #endif |
5f5c8ee5 GM |
966 | } |
967 | ||
968 | ||
969 | /* Make ROW an empty, enabled row of canonical character height, | |
970 | in window W starting at y-position Y. */ | |
971 | ||
972 | void | |
971de7fb | 973 | blank_row (struct window *w, struct glyph_row *row, int y) |
5f5c8ee5 GM |
974 | { |
975 | int min_y, max_y; | |
177c0ea7 | 976 | |
7df02016 KS |
977 | min_y = WINDOW_HEADER_LINE_HEIGHT (w); |
978 | max_y = WINDOW_BOX_HEIGHT_NO_MODE_LINE (w); | |
177c0ea7 | 979 | |
5f5c8ee5 GM |
980 | clear_glyph_row (row); |
981 | row->y = y; | |
408f5064 | 982 | row->ascent = row->phys_ascent = 0; |
7df02016 | 983 | row->height = row->phys_height = FRAME_LINE_HEIGHT (XFRAME (w->frame)); |
d6c747a4 | 984 | row->visible_height = row->height; |
177c0ea7 | 985 | |
5f5c8ee5 | 986 | if (row->y < min_y) |
d6c747a4 GM |
987 | row->visible_height -= min_y - row->y; |
988 | if (row->y + row->height > max_y) | |
989 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
990 | |
991 | row->enabled_p = 1; | |
992 | } | |
993 | ||
994 | ||
995 | /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES | |
996 | are the amounts by which to change positions. Note that the first | |
997 | glyph of the text area of a row can have a buffer position even if | |
998 | the used count of the text area is zero. Such rows display line | |
999 | ends. */ | |
1000 | ||
5bf46f05 | 1001 | static void |
ace1712c EZ |
1002 | increment_row_positions (struct glyph_row *row, |
1003 | EMACS_INT delta, EMACS_INT delta_bytes) | |
5f5c8ee5 GM |
1004 | { |
1005 | int area, i; | |
1006 | ||
1007 | /* Increment start and end positions. */ | |
1008 | MATRIX_ROW_START_CHARPOS (row) += delta; | |
1009 | MATRIX_ROW_START_BYTEPOS (row) += delta_bytes; | |
1010 | MATRIX_ROW_END_CHARPOS (row) += delta; | |
1011 | MATRIX_ROW_END_BYTEPOS (row) += delta_bytes; | |
d36fe237 EZ |
1012 | CHARPOS (row->start.pos) += delta; |
1013 | BYTEPOS (row->start.pos) += delta_bytes; | |
1014 | CHARPOS (row->end.pos) += delta; | |
1015 | BYTEPOS (row->end.pos) += delta_bytes; | |
5f5c8ee5 | 1016 | |
5cacdcfd KS |
1017 | if (!row->enabled_p) |
1018 | return; | |
1019 | ||
5f5c8ee5 GM |
1020 | /* Increment positions in glyphs. */ |
1021 | for (area = 0; area < LAST_AREA; ++area) | |
1022 | for (i = 0; i < row->used[area]; ++i) | |
1023 | if (BUFFERP (row->glyphs[area][i].object) | |
1024 | && row->glyphs[area][i].charpos > 0) | |
1025 | row->glyphs[area][i].charpos += delta; | |
1026 | ||
1027 | /* Capture the case of rows displaying a line end. */ | |
1028 | if (row->used[TEXT_AREA] == 0 | |
1029 | && MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1030 | row->glyphs[TEXT_AREA]->charpos += delta; | |
1031 | } | |
1032 | ||
1033 | ||
9af3e742 | 1034 | #if 0 |
5f5c8ee5 GM |
1035 | /* Swap glyphs between two glyph rows A and B. This exchanges glyph |
1036 | contents, i.e. glyph structure contents are exchanged between A and | |
1037 | B without changing glyph pointers in A and B. */ | |
1038 | ||
1039 | static void | |
1dae0f0a | 1040 | swap_glyphs_in_rows (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1041 | { |
1042 | int area; | |
1043 | ||
1044 | for (area = 0; area < LAST_AREA; ++area) | |
1045 | { | |
1046 | /* Number of glyphs to swap. */ | |
1047 | int max_used = max (a->used[area], b->used[area]); | |
1048 | ||
1049 | /* Start of glyphs in area of row A. */ | |
1050 | struct glyph *glyph_a = a->glyphs[area]; | |
1051 | ||
1052 | /* End + 1 of glyphs in area of row A. */ | |
1053 | struct glyph *glyph_a_end = a->glyphs[max_used]; | |
1054 | ||
1055 | /* Start of glyphs in area of row B. */ | |
1056 | struct glyph *glyph_b = b->glyphs[area]; | |
1057 | ||
1058 | while (glyph_a < glyph_a_end) | |
1059 | { | |
1060 | /* Non-ISO HP/UX compiler doesn't like auto struct | |
1061 | initialization. */ | |
1062 | struct glyph temp; | |
1063 | temp = *glyph_a; | |
1064 | *glyph_a = *glyph_b; | |
1065 | *glyph_b = temp; | |
1066 | ++glyph_a; | |
1067 | ++glyph_b; | |
1068 | } | |
1069 | } | |
1070 | } | |
1071 | ||
9af3e742 | 1072 | #endif /* 0 */ |
5f5c8ee5 | 1073 | |
015137db EZ |
1074 | /* Exchange pointers to glyph memory between glyph rows A and B. Also |
1075 | exchange the used[] array and the hash values of the rows, because | |
1076 | these should all go together for the row's hash value to be | |
1077 | correct. */ | |
5f5c8ee5 | 1078 | |
55d4c1b2 | 1079 | static inline void |
971de7fb | 1080 | swap_glyph_pointers (struct glyph_row *a, struct glyph_row *b) |
5f5c8ee5 GM |
1081 | { |
1082 | int i; | |
015137db EZ |
1083 | unsigned hash_tem = a->hash; |
1084 | ||
5f5c8ee5 GM |
1085 | for (i = 0; i < LAST_AREA + 1; ++i) |
1086 | { | |
1087 | struct glyph *temp = a->glyphs[i]; | |
015137db | 1088 | |
5f5c8ee5 GM |
1089 | a->glyphs[i] = b->glyphs[i]; |
1090 | b->glyphs[i] = temp; | |
73055685 EZ |
1091 | if (i < LAST_AREA) |
1092 | { | |
1093 | short used_tem = a->used[i]; | |
1094 | ||
1095 | a->used[i] = b->used[i]; | |
1096 | b->used[i] = used_tem; | |
1097 | } | |
5f5c8ee5 | 1098 | } |
015137db EZ |
1099 | a->hash = b->hash; |
1100 | b->hash = hash_tem; | |
5f5c8ee5 GM |
1101 | } |
1102 | ||
1103 | ||
1104 | /* Copy glyph row structure FROM to glyph row structure TO, except | |
015137db EZ |
1105 | that glyph pointers, the `used' counts, and the hash values in the |
1106 | structures are left unchanged. */ | |
5f5c8ee5 | 1107 | |
55d4c1b2 | 1108 | static inline void |
971de7fb | 1109 | copy_row_except_pointers (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1110 | { |
1111 | struct glyph *pointers[1 + LAST_AREA]; | |
73055685 | 1112 | short used[LAST_AREA]; |
015137db | 1113 | unsigned hashval; |
5f5c8ee5 GM |
1114 | |
1115 | /* Save glyph pointers of TO. */ | |
72af86bd | 1116 | memcpy (pointers, to->glyphs, sizeof to->glyphs); |
015137db EZ |
1117 | memcpy (used, to->used, sizeof to->used); |
1118 | hashval = to->hash; | |
5f5c8ee5 GM |
1119 | |
1120 | /* Do a structure assignment. */ | |
1121 | *to = *from; | |
1122 | ||
1123 | /* Restore original pointers of TO. */ | |
72af86bd | 1124 | memcpy (to->glyphs, pointers, sizeof to->glyphs); |
015137db EZ |
1125 | memcpy (to->used, used, sizeof to->used); |
1126 | to->hash = hashval; | |
5f5c8ee5 GM |
1127 | } |
1128 | ||
1129 | ||
5f5c8ee5 GM |
1130 | /* Assign glyph row FROM to glyph row TO. This works like a structure |
1131 | assignment TO = FROM, except that glyph pointers are not copied but | |
1132 | exchanged between TO and FROM. Pointers must be exchanged to avoid | |
1133 | a memory leak. */ | |
1134 | ||
55d4c1b2 | 1135 | static inline void |
971de7fb | 1136 | assign_row (struct glyph_row *to, struct glyph_row *from) |
5f5c8ee5 GM |
1137 | { |
1138 | swap_glyph_pointers (to, from); | |
1139 | copy_row_except_pointers (to, from); | |
1140 | } | |
1141 | ||
1142 | ||
1143 | /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is | |
1144 | a row in a window matrix, is a slice of the glyph memory of the | |
1145 | glyph row FRAME_ROW which is a row in a frame glyph matrix. Value | |
1146 | is non-zero if the glyph memory of WINDOW_ROW is part of the glyph | |
1147 | memory of FRAME_ROW. */ | |
1148 | ||
2d5912c1 | 1149 | #if GLYPH_DEBUG |
9339e87f | 1150 | |
5f5c8ee5 | 1151 | static int |
59fc5cf9 | 1152 | glyph_row_slice_p (struct glyph_row *window_row, struct glyph_row *frame_row) |
5f5c8ee5 GM |
1153 | { |
1154 | struct glyph *window_glyph_start = window_row->glyphs[0]; | |
1155 | struct glyph *frame_glyph_start = frame_row->glyphs[0]; | |
1156 | struct glyph *frame_glyph_end = frame_row->glyphs[LAST_AREA]; | |
1157 | ||
1158 | return (frame_glyph_start <= window_glyph_start | |
1159 | && window_glyph_start < frame_glyph_end); | |
1160 | } | |
1161 | ||
9339e87f | 1162 | #endif /* GLYPH_DEBUG */ |
5f5c8ee5 | 1163 | |
9af3e742 GM |
1164 | #if 0 |
1165 | ||
5f5c8ee5 GM |
1166 | /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice |
1167 | of ROW in the frame matrix FRAME_MATRIX. Value is null if no row | |
1168 | in WINDOW_MATRIX is found satisfying the condition. */ | |
1169 | ||
1170 | static struct glyph_row * | |
59fc5cf9 AS |
1171 | find_glyph_row_slice (struct glyph_matrix *window_matrix, |
1172 | struct glyph_matrix *frame_matrix, int row) | |
5f5c8ee5 GM |
1173 | { |
1174 | int i; | |
1175 | ||
1176 | xassert (row >= 0 && row < frame_matrix->nrows); | |
1177 | ||
1178 | for (i = 0; i < window_matrix->nrows; ++i) | |
1179 | if (glyph_row_slice_p (window_matrix->rows + i, | |
1180 | frame_matrix->rows + row)) | |
1181 | break; | |
1182 | ||
1183 | return i < window_matrix->nrows ? window_matrix->rows + i : 0; | |
1184 | } | |
1185 | ||
9af3e742 | 1186 | #endif /* 0 */ |
5f5c8ee5 GM |
1187 | |
1188 | /* Prepare ROW for display. Desired rows are cleared lazily, | |
1189 | i.e. they are only marked as to be cleared by setting their | |
1190 | enabled_p flag to zero. When a row is to be displayed, a prior | |
1191 | call to this function really clears it. */ | |
1192 | ||
1193 | void | |
971de7fb | 1194 | prepare_desired_row (struct glyph_row *row) |
5f5c8ee5 GM |
1195 | { |
1196 | if (!row->enabled_p) | |
1197 | { | |
dfd153ae | 1198 | int rp = row->reversed_p; |
5009f85e | 1199 | |
5f5c8ee5 GM |
1200 | clear_glyph_row (row); |
1201 | row->enabled_p = 1; | |
5009f85e | 1202 | row->reversed_p = rp; |
5f5c8ee5 GM |
1203 | } |
1204 | } | |
1205 | ||
1206 | ||
1207 | /* Return a hash code for glyph row ROW. */ | |
1208 | ||
2f7c71a1 | 1209 | static int |
971de7fb | 1210 | line_hash_code (struct glyph_row *row) |
5f5c8ee5 GM |
1211 | { |
1212 | int hash = 0; | |
177c0ea7 | 1213 | |
5f5c8ee5 GM |
1214 | if (row->enabled_p) |
1215 | { | |
4cecaab8 MB |
1216 | struct glyph *glyph = row->glyphs[TEXT_AREA]; |
1217 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
1218 | ||
1219 | while (glyph < end) | |
1220 | { | |
1221 | int c = glyph->u.ch; | |
1222 | int face_id = glyph->face_id; | |
daf01701 | 1223 | if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
4cecaab8 MB |
1224 | c -= SPACEGLYPH; |
1225 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + c; | |
1226 | hash = (((hash << 4) + (hash >> 24)) & 0x0fffffff) + face_id; | |
1227 | ++glyph; | |
1228 | } | |
5f5c8ee5 | 1229 | |
4cecaab8 MB |
1230 | if (hash == 0) |
1231 | hash = 1; | |
5f5c8ee5 GM |
1232 | } |
1233 | ||
1234 | return hash; | |
1235 | } | |
1236 | ||
1237 | ||
153a073c | 1238 | /* Return the cost of drawing line VPOS in MATRIX. The cost equals |
5f5c8ee5 GM |
1239 | the number of characters in the line. If must_write_spaces is |
1240 | zero, leading and trailing spaces are ignored. */ | |
1241 | ||
dfd153ae | 1242 | static int |
971de7fb | 1243 | line_draw_cost (struct glyph_matrix *matrix, int vpos) |
5f5c8ee5 GM |
1244 | { |
1245 | struct glyph_row *row = matrix->rows + vpos; | |
1246 | struct glyph *beg = row->glyphs[TEXT_AREA]; | |
1247 | struct glyph *end = beg + row->used[TEXT_AREA]; | |
1248 | int len; | |
1249 | Lisp_Object *glyph_table_base = GLYPH_TABLE_BASE; | |
ca9ce8f2 | 1250 | ptrdiff_t glyph_table_len = GLYPH_TABLE_LENGTH; |
5f5c8ee5 GM |
1251 | |
1252 | /* Ignore trailing and leading spaces if we can. */ | |
daf01701 | 1253 | if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */ |
5f5c8ee5 GM |
1254 | { |
1255 | /* Skip from the end over trailing spaces. */ | |
2b4ec4d7 | 1256 | while (end > beg && CHAR_GLYPH_SPACE_P (*(end - 1))) |
5f5c8ee5 GM |
1257 | --end; |
1258 | ||
177c0ea7 | 1259 | /* All blank line. */ |
5f5c8ee5 GM |
1260 | if (end == beg) |
1261 | return 0; | |
1262 | ||
1263 | /* Skip over leading spaces. */ | |
1264 | while (CHAR_GLYPH_SPACE_P (*beg)) | |
1265 | ++beg; | |
1266 | } | |
1267 | ||
1268 | /* If we don't have a glyph-table, each glyph is one character, | |
1269 | so return the number of glyphs. */ | |
1270 | if (glyph_table_base == 0) | |
1271 | len = end - beg; | |
1272 | else | |
1273 | { | |
1274 | /* Otherwise, scan the glyphs and accumulate their total length | |
1275 | in LEN. */ | |
1276 | len = 0; | |
1277 | while (beg < end) | |
1278 | { | |
3fc809e2 | 1279 | GLYPH g; |
177c0ea7 | 1280 | |
3fc809e2 KS |
1281 | SET_GLYPH_FROM_CHAR_GLYPH (g, *beg); |
1282 | ||
565b39a8 | 1283 | if (GLYPH_INVALID_P (g) |
42186983 | 1284 | || GLYPH_SIMPLE_P (glyph_table_base, glyph_table_len, g)) |
5f5c8ee5 GM |
1285 | len += 1; |
1286 | else | |
1287 | len += GLYPH_LENGTH (glyph_table_base, g); | |
177c0ea7 | 1288 | |
5f5c8ee5 GM |
1289 | ++beg; |
1290 | } | |
1291 | } | |
177c0ea7 | 1292 | |
5f5c8ee5 GM |
1293 | return len; |
1294 | } | |
1295 | ||
1296 | ||
1297 | /* Test two glyph rows A and B for equality. Value is non-zero if A | |
6b1f9ba4 JB |
1298 | and B have equal contents. MOUSE_FACE_P non-zero means compare the |
1299 | mouse_face_p flags of A and B, too. */ | |
5f5c8ee5 | 1300 | |
55d4c1b2 | 1301 | static inline int |
6b1f9ba4 | 1302 | row_equal_p (struct glyph_row *a, struct glyph_row *b, int mouse_face_p) |
5f5c8ee5 | 1303 | { |
7a7270dd EZ |
1304 | xassert (verify_row_hash (a)); |
1305 | xassert (verify_row_hash (b)); | |
1306 | ||
5f5c8ee5 GM |
1307 | if (a == b) |
1308 | return 1; | |
1309 | else if (a->hash != b->hash) | |
1310 | return 0; | |
1311 | else | |
1312 | { | |
1313 | struct glyph *a_glyph, *b_glyph, *a_end; | |
1314 | int area; | |
1315 | ||
e4e0bee9 GM |
1316 | if (mouse_face_p && a->mouse_face_p != b->mouse_face_p) |
1317 | return 0; | |
1318 | ||
5f5c8ee5 GM |
1319 | /* Compare glyphs. */ |
1320 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
1321 | { | |
1322 | if (a->used[area] != b->used[area]) | |
1323 | return 0; | |
177c0ea7 | 1324 | |
5f5c8ee5 GM |
1325 | a_glyph = a->glyphs[area]; |
1326 | a_end = a_glyph + a->used[area]; | |
1327 | b_glyph = b->glyphs[area]; | |
177c0ea7 | 1328 | |
5f5c8ee5 GM |
1329 | while (a_glyph < a_end |
1330 | && GLYPH_EQUAL_P (a_glyph, b_glyph)) | |
1331 | ++a_glyph, ++b_glyph; | |
177c0ea7 | 1332 | |
5f5c8ee5 GM |
1333 | if (a_glyph != a_end) |
1334 | return 0; | |
1335 | } | |
1336 | ||
6b61353c KH |
1337 | if (a->fill_line_p != b->fill_line_p |
1338 | || a->cursor_in_fringe_p != b->cursor_in_fringe_p | |
1339 | || a->left_fringe_bitmap != b->left_fringe_bitmap | |
1340 | || a->left_fringe_face_id != b->left_fringe_face_id | |
e61124cd | 1341 | || a->left_fringe_offset != b->left_fringe_offset |
6b61353c KH |
1342 | || a->right_fringe_bitmap != b->right_fringe_bitmap |
1343 | || a->right_fringe_face_id != b->right_fringe_face_id | |
e61124cd YM |
1344 | || a->right_fringe_offset != b->right_fringe_offset |
1345 | || a->fringe_bitmap_periodic_p != b->fringe_bitmap_periodic_p | |
3d4a365f | 1346 | || a->overlay_arrow_bitmap != b->overlay_arrow_bitmap |
6b61353c | 1347 | || a->exact_window_width_line_p != b->exact_window_width_line_p |
408f5064 | 1348 | || a->overlapped_p != b->overlapped_p |
5f5c8ee5 GM |
1349 | || (MATRIX_ROW_CONTINUATION_LINE_P (a) |
1350 | != MATRIX_ROW_CONTINUATION_LINE_P (b)) | |
918f4159 | 1351 | || a->reversed_p != b->reversed_p |
5f5c8ee5 GM |
1352 | /* Different partially visible characters on left margin. */ |
1353 | || a->x != b->x | |
1354 | /* Different height. */ | |
1355 | || a->ascent != b->ascent | |
408f5064 GM |
1356 | || a->phys_ascent != b->phys_ascent |
1357 | || a->phys_height != b->phys_height | |
5f5c8ee5 GM |
1358 | || a->visible_height != b->visible_height) |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | return 1; | |
1363 | } | |
1364 | ||
1365 | ||
1366 | \f | |
1367 | /*********************************************************************** | |
1368 | Glyph Pool | |
1369 | ||
1370 | See dispextern.h for an overall explanation of glyph pools. | |
1371 | ***********************************************************************/ | |
1372 | ||
1373 | /* Allocate a glyph_pool structure. The structure returned is | |
1374 | initialized with zeros. The global variable glyph_pool_count is | |
1375 | incremented for each pool allocated. */ | |
1376 | ||
1377 | static struct glyph_pool * | |
971de7fb | 1378 | new_glyph_pool (void) |
5f5c8ee5 GM |
1379 | { |
1380 | struct glyph_pool *result; | |
1381 | ||
1382 | /* Allocate a new glyph_pool and clear it. */ | |
1383 | result = (struct glyph_pool *) xmalloc (sizeof *result); | |
72af86bd | 1384 | memset (result, 0, sizeof *result); |
177c0ea7 | 1385 | |
5f5c8ee5 GM |
1386 | /* For memory leak and double deletion checking. */ |
1387 | ++glyph_pool_count; | |
177c0ea7 | 1388 | |
5f5c8ee5 GM |
1389 | return result; |
1390 | } | |
1391 | ||
1392 | ||
1393 | /* Free a glyph_pool structure POOL. The function may be called with | |
1394 | a null POOL pointer. The global variable glyph_pool_count is | |
1395 | decremented with every pool structure freed. If this count gets | |
1396 | negative, more structures were freed than allocated, i.e. one | |
1397 | structure must have been freed more than once or a bogus pointer | |
1398 | was passed to free_glyph_pool. */ | |
1399 | ||
1400 | static void | |
971de7fb | 1401 | free_glyph_pool (struct glyph_pool *pool) |
5f5c8ee5 GM |
1402 | { |
1403 | if (pool) | |
1404 | { | |
153a073c | 1405 | /* More freed than allocated? */ |
5f5c8ee5 GM |
1406 | --glyph_pool_count; |
1407 | xassert (glyph_pool_count >= 0); | |
1408 | ||
1409 | xfree (pool->glyphs); | |
1410 | xfree (pool); | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | ||
1415 | /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and | |
1416 | columns we need. This function never shrinks a pool. The only | |
1417 | case in which this would make sense, would be when a frame's size | |
1418 | is changed from a large value to a smaller one. But, if someone | |
1419 | does it once, we can expect that he will do it again. | |
1420 | ||
1421 | Value is non-zero if the pool changed in a way which makes | |
1422 | re-adjusting window glyph matrices necessary. */ | |
1423 | ||
1424 | static int | |
971de7fb | 1425 | realloc_glyph_pool (struct glyph_pool *pool, struct dim matrix_dim) |
5f5c8ee5 | 1426 | { |
ca9ce8f2 | 1427 | ptrdiff_t needed; |
5f5c8ee5 GM |
1428 | int changed_p; |
1429 | ||
1430 | changed_p = (pool->glyphs == 0 | |
1431 | || matrix_dim.height != pool->nrows | |
1432 | || matrix_dim.width != pool->ncolumns); | |
1433 | ||
1434 | /* Enlarge the glyph pool. */ | |
ca9ce8f2 | 1435 | needed = matrix_dim.width; |
0065d054 PE |
1436 | if (INT_MULTIPLY_OVERFLOW (needed, matrix_dim.height)) |
1437 | memory_full (SIZE_MAX); | |
ca9ce8f2 | 1438 | needed *= matrix_dim.height; |
5f5c8ee5 GM |
1439 | if (needed > pool->nglyphs) |
1440 | { | |
0065d054 PE |
1441 | ptrdiff_t old_nglyphs = pool->nglyphs; |
1442 | pool->glyphs = xpalloc (pool->glyphs, &pool->nglyphs, | |
1443 | needed - old_nglyphs, -1, sizeof *pool->glyphs); | |
1444 | memset (pool->glyphs + old_nglyphs, 0, | |
1445 | (pool->nglyphs - old_nglyphs) * sizeof *pool->glyphs); | |
5f5c8ee5 GM |
1446 | } |
1447 | ||
153a073c | 1448 | /* Remember the number of rows and columns because (a) we use them |
5f5c8ee5 GM |
1449 | to do sanity checks, and (b) the number of columns determines |
1450 | where rows in the frame matrix start---this must be available to | |
1451 | determine pointers to rows of window sub-matrices. */ | |
1452 | pool->nrows = matrix_dim.height; | |
1453 | pool->ncolumns = matrix_dim.width; | |
177c0ea7 | 1454 | |
5f5c8ee5 GM |
1455 | return changed_p; |
1456 | } | |
1457 | ||
1458 | ||
1459 | \f | |
1460 | /*********************************************************************** | |
1461 | Debug Code | |
1462 | ***********************************************************************/ | |
1463 | ||
1464 | #if GLYPH_DEBUG | |
1465 | ||
a13396c9 | 1466 | |
28d440ab KL |
1467 | /* Flush standard output. This is sometimes useful to call from the debugger. |
1468 | XXX Maybe this should be changed to flush the current terminal instead of | |
1469 | stdout. | |
1470 | */ | |
a13396c9 | 1471 | |
85fece3e PE |
1472 | void flush_stdout (void) EXTERNALLY_VISIBLE; |
1473 | ||
a13396c9 | 1474 | void |
59fc5cf9 | 1475 | flush_stdout (void) |
a13396c9 GM |
1476 | { |
1477 | fflush (stdout); | |
1478 | } | |
1479 | ||
1480 | ||
5f5c8ee5 GM |
1481 | /* Check that no glyph pointers have been lost in MATRIX. If a |
1482 | pointer has been lost, e.g. by using a structure assignment between | |
1483 | rows, at least one pointer must occur more than once in the rows of | |
1484 | MATRIX. */ | |
1485 | ||
1486 | void | |
59fc5cf9 | 1487 | check_matrix_pointer_lossage (struct glyph_matrix *matrix) |
5f5c8ee5 GM |
1488 | { |
1489 | int i, j; | |
177c0ea7 | 1490 | |
5f5c8ee5 GM |
1491 | for (i = 0; i < matrix->nrows; ++i) |
1492 | for (j = 0; j < matrix->nrows; ++j) | |
1493 | xassert (i == j | |
1494 | || (matrix->rows[i].glyphs[TEXT_AREA] | |
1495 | != matrix->rows[j].glyphs[TEXT_AREA])); | |
1496 | } | |
1497 | ||
1498 | ||
1499 | /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */ | |
1500 | ||
1501 | struct glyph_row * | |
59fc5cf9 | 1502 | matrix_row (struct glyph_matrix *matrix, int row) |
5f5c8ee5 GM |
1503 | { |
1504 | xassert (matrix && matrix->rows); | |
1505 | xassert (row >= 0 && row < matrix->nrows); | |
1506 | ||
1507 | /* That's really too slow for normal testing because this function | |
1508 | is called almost everywhere. Although---it's still astonishingly | |
1509 | fast, so it is valuable to have for debugging purposes. */ | |
1510 | #if 0 | |
1511 | check_matrix_pointer_lossage (matrix); | |
1512 | #endif | |
177c0ea7 | 1513 | |
5f5c8ee5 GM |
1514 | return matrix->rows + row; |
1515 | } | |
1516 | ||
1517 | ||
1518 | #if 0 /* This function makes invalid assumptions when text is | |
1519 | partially invisible. But it might come handy for debugging | |
1520 | nevertheless. */ | |
1521 | ||
1522 | /* Check invariants that must hold for an up to date current matrix of | |
1523 | window W. */ | |
1524 | ||
1525 | static void | |
59fc5cf9 | 1526 | check_matrix_invariants (struct window *w) |
5f5c8ee5 GM |
1527 | { |
1528 | struct glyph_matrix *matrix = w->current_matrix; | |
1529 | int yb = window_text_bottom_y (w); | |
1530 | struct glyph_row *row = matrix->rows; | |
1531 | struct glyph_row *last_text_row = NULL; | |
1532 | struct buffer *saved = current_buffer; | |
1533 | struct buffer *buffer = XBUFFER (w->buffer); | |
1534 | int c; | |
177c0ea7 | 1535 | |
5f5c8ee5 GM |
1536 | /* This can sometimes happen for a fresh window. */ |
1537 | if (matrix->nrows < 2) | |
1538 | return; | |
1539 | ||
1540 | set_buffer_temp (buffer); | |
1541 | ||
1542 | /* Note: last row is always reserved for the mode line. */ | |
1543 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1544 | && MATRIX_ROW_BOTTOM_Y (row) < yb) | |
1545 | { | |
1546 | struct glyph_row *next = row + 1; | |
1547 | ||
1548 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
1549 | last_text_row = row; | |
1550 | ||
1551 | /* Check that character and byte positions are in sync. */ | |
1552 | xassert (MATRIX_ROW_START_BYTEPOS (row) | |
1553 | == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row))); | |
d36fe237 EZ |
1554 | xassert (BYTEPOS (row->start.pos) |
1555 | == CHAR_TO_BYTE (CHARPOS (row->start.pos))); | |
5f5c8ee5 GM |
1556 | |
1557 | /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can | |
1558 | have such a position temporarily in case of a minibuffer | |
1559 | displaying something like `[Sole completion]' at its end. */ | |
1560 | if (MATRIX_ROW_END_CHARPOS (row) < BUF_ZV (current_buffer)) | |
d36fe237 EZ |
1561 | { |
1562 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1563 | == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row))); | |
1564 | xassert (BYTEPOS (row->end.pos) | |
1565 | == CHAR_TO_BYTE (CHARPOS (row->end.pos))); | |
1566 | } | |
5f5c8ee5 GM |
1567 | |
1568 | /* Check that end position of `row' is equal to start position | |
1569 | of next row. */ | |
1570 | if (next->enabled_p && MATRIX_ROW_DISPLAYS_TEXT_P (next)) | |
1571 | { | |
1572 | xassert (MATRIX_ROW_END_CHARPOS (row) | |
1573 | == MATRIX_ROW_START_CHARPOS (next)); | |
1574 | xassert (MATRIX_ROW_END_BYTEPOS (row) | |
1575 | == MATRIX_ROW_START_BYTEPOS (next)); | |
d36fe237 EZ |
1576 | xassert (CHARPOS (row->end.pos) == CHARPOS (next->start.pos)); |
1577 | xassert (BYTEPOS (row->end.pos) == BYTEPOS (next->start.pos)); | |
5f5c8ee5 GM |
1578 | } |
1579 | row = next; | |
1580 | } | |
1581 | ||
1582 | xassert (w->current_matrix->nrows == w->desired_matrix->nrows); | |
1583 | xassert (w->desired_matrix->rows != NULL); | |
1584 | set_buffer_temp (saved); | |
1585 | } | |
1586 | ||
1587 | #endif /* 0 */ | |
1588 | ||
1589 | #endif /* GLYPH_DEBUG != 0 */ | |
1590 | ||
1591 | ||
1592 | \f | |
1593 | /********************************************************************** | |
1594 | Allocating/ Adjusting Glyph Matrices | |
1595 | **********************************************************************/ | |
1596 | ||
1597 | /* Allocate glyph matrices over a window tree for a frame-based | |
1598 | redisplay | |
1599 | ||
1600 | X and Y are column/row within the frame glyph matrix where | |
1601 | sub-matrices for the window tree rooted at WINDOW must be | |
8ce2650d YM |
1602 | allocated. DIM_ONLY_P non-zero means that the caller of this |
1603 | function is only interested in the result matrix dimension, and | |
1604 | matrix adjustments should not be performed. | |
5f5c8ee5 GM |
1605 | |
1606 | The function returns the total width/height of the sub-matrices of | |
1607 | the window tree. If called on a frame root window, the computation | |
1608 | will take the mini-buffer window into account. | |
1609 | ||
1610 | *WINDOW_CHANGE_FLAGS is set to a bit mask with bits | |
1611 | ||
1612 | NEW_LEAF_MATRIX set if any window in the tree did not have a | |
1613 | glyph matrices yet, and | |
1614 | ||
1615 | CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of | |
1616 | any window in the tree will be changed or have been changed (see | |
153a073c | 1617 | DIM_ONLY_P) |
5f5c8ee5 GM |
1618 | |
1619 | *WINDOW_CHANGE_FLAGS must be initialized by the caller of this | |
1620 | function. | |
1621 | ||
1622 | Windows are arranged into chains of windows on the same level | |
1623 | through the next fields of window structures. Such a level can be | |
1624 | either a sequence of horizontally adjacent windows from left to | |
1625 | right, or a sequence of vertically adjacent windows from top to | |
1626 | bottom. Each window in a horizontal sequence can be either a leaf | |
1627 | window or a vertical sequence; a window in a vertical sequence can | |
1628 | be either a leaf or a horizontal sequence. All windows in a | |
1629 | horizontal sequence have the same height, and all windows in a | |
1630 | vertical sequence have the same width. | |
1631 | ||
1632 | This function uses, for historical reasons, a more general | |
1633 | algorithm to determine glyph matrix dimensions that would be | |
1634 | necessary. | |
1635 | ||
1636 | The matrix height of a horizontal sequence is determined by the | |
1637 | maximum height of any matrix in the sequence. The matrix width of | |
1638 | a horizontal sequence is computed by adding up matrix widths of | |
1639 | windows in the sequence. | |
1640 | ||
1641 | |<------- result width ------->| | |
1642 | +---------+----------+---------+ --- | |
1643 | | | | | | | |
1644 | | | | | | |
1645 | +---------+ | | result height | |
1646 | | +---------+ | |
1647 | | | | | |
1648 | +----------+ --- | |
1649 | ||
1650 | The matrix width of a vertical sequence is the maximum matrix width | |
1651 | of any window in the sequence. Its height is computed by adding up | |
1652 | matrix heights of windows in the sequence. | |
1653 | ||
1654 | |<---- result width -->| | |
1655 | +---------+ --- | |
1656 | | | | | |
1657 | | | | | |
1658 | +---------+--+ | | |
1659 | | | | | |
1660 | | | result height | |
1661 | | | | |
1662 | +------------+---------+ | | |
1663 | | | | | |
1664 | | | | | |
1665 | +------------+---------+ --- */ | |
1666 | ||
1667 | /* Bit indicating that a new matrix will be allocated or has been | |
1668 | allocated. */ | |
1669 | ||
1670 | #define NEW_LEAF_MATRIX (1 << 0) | |
1671 | ||
1672 | /* Bit indicating that a matrix will or has changed its location or | |
1673 | size. */ | |
1674 | ||
1675 | #define CHANGED_LEAF_MATRIX (1 << 1) | |
1676 | ||
1677 | static struct dim | |
6f704c76 DN |
1678 | allocate_matrices_for_frame_redisplay (Lisp_Object window, int x, int y, |
1679 | int dim_only_p, int *window_change_flags) | |
5f5c8ee5 GM |
1680 | { |
1681 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (window))); | |
1682 | int x0 = x, y0 = y; | |
1683 | int wmax = 0, hmax = 0; | |
1684 | struct dim total; | |
1685 | struct dim dim; | |
1686 | struct window *w; | |
1687 | int in_horz_combination_p; | |
1688 | ||
1689 | /* What combination is WINDOW part of? Compute this once since the | |
1690 | result is the same for all windows in the `next' chain. The | |
1691 | special case of a root window (parent equal to nil) is treated | |
1692 | like a vertical combination because a root window's `next' | |
1693 | points to the mini-buffer window, if any, which is arranged | |
1694 | vertically below other windows. */ | |
1695 | in_horz_combination_p | |
1696 | = (!NILP (XWINDOW (window)->parent) | |
1697 | && !NILP (XWINDOW (XWINDOW (window)->parent)->hchild)); | |
1698 | ||
1699 | /* For WINDOW and all windows on the same level. */ | |
177c0ea7 | 1700 | do |
5f5c8ee5 GM |
1701 | { |
1702 | w = XWINDOW (window); | |
1703 | ||
1704 | /* Get the dimension of the window sub-matrix for W, depending | |
153a073c | 1705 | on whether this is a combination or a leaf window. */ |
5f5c8ee5 | 1706 | if (!NILP (w->hchild)) |
177c0ea7 | 1707 | dim = allocate_matrices_for_frame_redisplay (w->hchild, x, y, |
5f5c8ee5 GM |
1708 | dim_only_p, |
1709 | window_change_flags); | |
1710 | else if (!NILP (w->vchild)) | |
177c0ea7 | 1711 | dim = allocate_matrices_for_frame_redisplay (w->vchild, x, y, |
5f5c8ee5 GM |
1712 | dim_only_p, |
1713 | window_change_flags); | |
1714 | else | |
1715 | { | |
1716 | /* If not already done, allocate sub-matrix structures. */ | |
1717 | if (w->desired_matrix == NULL) | |
1718 | { | |
1719 | w->desired_matrix = new_glyph_matrix (f->desired_pool); | |
1720 | w->current_matrix = new_glyph_matrix (f->current_pool); | |
1721 | *window_change_flags |= NEW_LEAF_MATRIX; | |
1722 | } | |
177c0ea7 | 1723 | |
5f5c8ee5 GM |
1724 | /* Width and height MUST be chosen so that there are no |
1725 | holes in the frame matrix. */ | |
5d3cc43c GM |
1726 | dim.width = required_matrix_width (w); |
1727 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1728 | |
1729 | /* Will matrix be re-allocated? */ | |
1730 | if (x != w->desired_matrix->matrix_x | |
1731 | || y != w->desired_matrix->matrix_y | |
1732 | || dim.width != w->desired_matrix->matrix_w | |
1733 | || dim.height != w->desired_matrix->matrix_h | |
1734 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1735 | w->left_margin_cols) |
5f5c8ee5 GM |
1736 | != w->desired_matrix->left_margin_glyphs) |
1737 | || (margin_glyphs_to_reserve (w, dim.width, | |
cc834cf9 | 1738 | w->right_margin_cols) |
5f5c8ee5 GM |
1739 | != w->desired_matrix->right_margin_glyphs)) |
1740 | *window_change_flags |= CHANGED_LEAF_MATRIX; | |
1741 | ||
1742 | /* Actually change matrices, if allowed. Do not consider | |
1743 | CHANGED_LEAF_MATRIX computed above here because the pool | |
1744 | may have been changed which we don't now here. We trust | |
1745 | that we only will be called with DIM_ONLY_P != 0 when | |
1746 | necessary. */ | |
1747 | if (!dim_only_p) | |
1748 | { | |
1749 | adjust_glyph_matrix (w, w->desired_matrix, x, y, dim); | |
1750 | adjust_glyph_matrix (w, w->current_matrix, x, y, dim); | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | /* If we are part of a horizontal combination, advance x for | |
1755 | windows to the right of W; otherwise advance y for windows | |
1756 | below W. */ | |
1757 | if (in_horz_combination_p) | |
1758 | x += dim.width; | |
177c0ea7 | 1759 | else |
5f5c8ee5 GM |
1760 | y += dim.height; |
1761 | ||
1762 | /* Remember maximum glyph matrix dimensions. */ | |
1763 | wmax = max (wmax, dim.width); | |
1764 | hmax = max (hmax, dim.height); | |
1765 | ||
1766 | /* Next window on same level. */ | |
1767 | window = w->next; | |
1768 | } | |
1769 | while (!NILP (window)); | |
1770 | ||
1771 | /* Set `total' to the total glyph matrix dimension of this window | |
1772 | level. In a vertical combination, the width is the width of the | |
1773 | widest window; the height is the y we finally reached, corrected | |
1774 | by the y we started with. In a horizontal combination, the total | |
1775 | height is the height of the tallest window, and the width is the | |
1776 | x we finally reached, corrected by the x we started with. */ | |
1777 | if (in_horz_combination_p) | |
1778 | { | |
1779 | total.width = x - x0; | |
1780 | total.height = hmax; | |
1781 | } | |
177c0ea7 | 1782 | else |
5f5c8ee5 GM |
1783 | { |
1784 | total.width = wmax; | |
1785 | total.height = y - y0; | |
1786 | } | |
1787 | ||
1788 | return total; | |
1789 | } | |
1790 | ||
1791 | ||
5d3cc43c GM |
1792 | /* Return the required height of glyph matrices for window W. */ |
1793 | ||
2f7c71a1 | 1794 | static int |
971de7fb | 1795 | required_matrix_height (struct window *w) |
5d3cc43c GM |
1796 | { |
1797 | #ifdef HAVE_WINDOW_SYSTEM | |
1798 | struct frame *f = XFRAME (w->frame); | |
177c0ea7 | 1799 | |
5d3cc43c GM |
1800 | if (FRAME_WINDOW_P (f)) |
1801 | { | |
1802 | int ch_height = FRAME_SMALLEST_FONT_HEIGHT (f); | |
1ea40aa2 | 1803 | int window_pixel_height = window_box_height (w) + eabs (w->vscroll); |
5d3cc43c | 1804 | return (((window_pixel_height + ch_height - 1) |
cc834cf9 | 1805 | / ch_height) * w->nrows_scale_factor |
5d3cc43c GM |
1806 | /* One partially visible line at the top and |
1807 | bottom of the window. */ | |
1808 | + 2 | |
153a073c | 1809 | /* 2 for header and mode line. */ |
5d3cc43c GM |
1810 | + 2); |
1811 | } | |
1812 | #endif /* HAVE_WINDOW_SYSTEM */ | |
177c0ea7 | 1813 | |
7df02016 | 1814 | return WINDOW_TOTAL_LINES (w); |
5d3cc43c GM |
1815 | } |
1816 | ||
1817 | ||
1818 | /* Return the required width of glyph matrices for window W. */ | |
1819 | ||
2f7c71a1 | 1820 | static int |
971de7fb | 1821 | required_matrix_width (struct window *w) |
5d3cc43c GM |
1822 | { |
1823 | #ifdef HAVE_WINDOW_SYSTEM | |
1824 | struct frame *f = XFRAME (w->frame); | |
1825 | if (FRAME_WINDOW_P (f)) | |
1826 | { | |
1827 | int ch_width = FRAME_SMALLEST_CHAR_WIDTH (f); | |
7df02016 | 1828 | int window_pixel_width = WINDOW_TOTAL_WIDTH (w); |
177c0ea7 | 1829 | |
5d3cc43c GM |
1830 | /* Compute number of glyphs needed in a glyph row. */ |
1831 | return (((window_pixel_width + ch_width - 1) | |
cc834cf9 | 1832 | / ch_width) * w->ncols_scale_factor |
5d3cc43c GM |
1833 | /* 2 partially visible columns in the text area. */ |
1834 | + 2 | |
1835 | /* One partially visible column at the right | |
1836 | edge of each marginal area. */ | |
1837 | + 1 + 1); | |
1838 | } | |
1839 | #endif /* HAVE_WINDOW_SYSTEM */ | |
1840 | ||
7df02016 | 1841 | return XINT (w->total_cols); |
5d3cc43c GM |
1842 | } |
1843 | ||
1844 | ||
5f5c8ee5 | 1845 | /* Allocate window matrices for window-based redisplay. W is the |
8ce2650d | 1846 | window whose matrices must be allocated/reallocated. */ |
177c0ea7 | 1847 | |
5f5c8ee5 | 1848 | static void |
971de7fb | 1849 | allocate_matrices_for_window_redisplay (struct window *w) |
5f5c8ee5 | 1850 | { |
5f5c8ee5 GM |
1851 | while (w) |
1852 | { | |
1853 | if (!NILP (w->vchild)) | |
5d3cc43c | 1854 | allocate_matrices_for_window_redisplay (XWINDOW (w->vchild)); |
5f5c8ee5 | 1855 | else if (!NILP (w->hchild)) |
5d3cc43c | 1856 | allocate_matrices_for_window_redisplay (XWINDOW (w->hchild)); |
5f5c8ee5 GM |
1857 | else |
1858 | { | |
1859 | /* W is a leaf window. */ | |
5f5c8ee5 GM |
1860 | struct dim dim; |
1861 | ||
1862 | /* If matrices are not yet allocated, allocate them now. */ | |
1863 | if (w->desired_matrix == NULL) | |
1864 | { | |
1865 | w->desired_matrix = new_glyph_matrix (NULL); | |
1866 | w->current_matrix = new_glyph_matrix (NULL); | |
1867 | } | |
1868 | ||
5d3cc43c GM |
1869 | dim.width = required_matrix_width (w); |
1870 | dim.height = required_matrix_height (w); | |
5f5c8ee5 GM |
1871 | adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim); |
1872 | adjust_glyph_matrix (w, w->current_matrix, 0, 0, dim); | |
1873 | } | |
177c0ea7 | 1874 | |
5f5c8ee5 GM |
1875 | w = NILP (w->next) ? NULL : XWINDOW (w->next); |
1876 | } | |
1877 | } | |
1878 | ||
1879 | ||
1880 | /* Re-allocate/ re-compute glyph matrices on frame F. If F is null, | |
1881 | do it for all frames; otherwise do it just for the given frame. | |
1882 | This function must be called when a new frame is created, its size | |
1883 | changes, or its window configuration changes. */ | |
1884 | ||
1885 | void | |
971de7fb | 1886 | adjust_glyphs (struct frame *f) |
5f5c8ee5 | 1887 | { |
408f5064 GM |
1888 | /* Block input so that expose events and other events that access |
1889 | glyph matrices are not processed while we are changing them. */ | |
1890 | BLOCK_INPUT; | |
1891 | ||
5f5c8ee5 GM |
1892 | if (f) |
1893 | adjust_frame_glyphs (f); | |
1894 | else | |
1895 | { | |
1896 | Lisp_Object tail, lisp_frame; | |
177c0ea7 | 1897 | |
5f5c8ee5 GM |
1898 | FOR_EACH_FRAME (tail, lisp_frame) |
1899 | adjust_frame_glyphs (XFRAME (lisp_frame)); | |
1900 | } | |
408f5064 GM |
1901 | |
1902 | UNBLOCK_INPUT; | |
5f5c8ee5 GM |
1903 | } |
1904 | ||
1905 | ||
1906 | /* Adjust frame glyphs when Emacs is initialized. | |
177c0ea7 JB |
1907 | |
1908 | To be called from init_display. | |
1909 | ||
5f5c8ee5 GM |
1910 | We need a glyph matrix because redraw will happen soon. |
1911 | Unfortunately, window sizes on selected_frame are not yet set to | |
1912 | meaningful values. I believe we can assume that there are only two | |
1913 | windows on the frame---the mini-buffer and the root window. Frame | |
1914 | height and width seem to be correct so far. So, set the sizes of | |
1915 | windows to estimated values. */ | |
1916 | ||
1917 | static void | |
971de7fb | 1918 | adjust_frame_glyphs_initially (void) |
5f5c8ee5 | 1919 | { |
91fb7e1b GM |
1920 | struct frame *sf = SELECTED_FRAME (); |
1921 | struct window *root = XWINDOW (sf->root_window); | |
5f5c8ee5 | 1922 | struct window *mini = XWINDOW (root->next); |
7df02016 KS |
1923 | int frame_lines = FRAME_LINES (sf); |
1924 | int frame_cols = FRAME_COLS (sf); | |
91fb7e1b | 1925 | int top_margin = FRAME_TOP_MARGIN (sf); |
5f5c8ee5 GM |
1926 | |
1927 | /* Do it for the root window. */ | |
7df02016 | 1928 | XSETFASTINT (root->top_line, top_margin); |
562dd5e9 | 1929 | XSETFASTINT (root->total_lines, frame_lines - 1 - top_margin); |
7df02016 | 1930 | XSETFASTINT (root->total_cols, frame_cols); |
5f5c8ee5 GM |
1931 | |
1932 | /* Do it for the mini-buffer window. */ | |
7df02016 | 1933 | XSETFASTINT (mini->top_line, frame_lines - 1); |
562dd5e9 | 1934 | XSETFASTINT (mini->total_lines, 1); |
7df02016 | 1935 | XSETFASTINT (mini->total_cols, frame_cols); |
5f5c8ee5 | 1936 | |
91fb7e1b | 1937 | adjust_frame_glyphs (sf); |
5f5c8ee5 GM |
1938 | glyphs_initialized_initially_p = 1; |
1939 | } | |
177c0ea7 | 1940 | |
5f5c8ee5 GM |
1941 | |
1942 | /* Allocate/reallocate glyph matrices of a single frame F. */ | |
1943 | ||
1944 | static void | |
971de7fb | 1945 | adjust_frame_glyphs (struct frame *f) |
5f5c8ee5 GM |
1946 | { |
1947 | if (FRAME_WINDOW_P (f)) | |
1948 | adjust_frame_glyphs_for_window_redisplay (f); | |
1949 | else | |
1950 | adjust_frame_glyphs_for_frame_redisplay (f); | |
177c0ea7 | 1951 | |
5f5c8ee5 GM |
1952 | /* Don't forget the message buffer and the buffer for |
1953 | decode_mode_spec. */ | |
1954 | adjust_frame_message_buffer (f); | |
1955 | adjust_decode_mode_spec_buffer (f); | |
1956 | ||
1957 | f->glyphs_initialized_p = 1; | |
1958 | } | |
1959 | ||
075757cc CY |
1960 | /* Return 1 if any window in the tree has nonzero window margins. See |
1961 | the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */ | |
1962 | static int | |
971de7fb | 1963 | showing_window_margins_p (struct window *w) |
075757cc CY |
1964 | { |
1965 | while (w) | |
1966 | { | |
1967 | if (!NILP (w->hchild)) | |
1968 | { | |
1969 | if (showing_window_margins_p (XWINDOW (w->hchild))) | |
1970 | return 1; | |
1971 | } | |
1972 | else if (!NILP (w->vchild)) | |
1973 | { | |
1974 | if (showing_window_margins_p (XWINDOW (w->vchild))) | |
1975 | return 1; | |
1976 | } | |
1977 | else if (!NILP (w->left_margin_cols) | |
1978 | || !NILP (w->right_margin_cols)) | |
1979 | return 1; | |
3fc809e2 | 1980 | |
075757cc CY |
1981 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
1982 | } | |
1983 | return 0; | |
1984 | } | |
1985 | ||
5f5c8ee5 | 1986 | |
c9f00270 GM |
1987 | /* In the window tree with root W, build current matrices of leaf |
1988 | windows from the frame's current matrix. */ | |
1989 | ||
1990 | static void | |
971de7fb | 1991 | fake_current_matrices (Lisp_Object window) |
c9f00270 GM |
1992 | { |
1993 | struct window *w; | |
177c0ea7 | 1994 | |
c9f00270 GM |
1995 | for (; !NILP (window); window = w->next) |
1996 | { | |
1997 | w = XWINDOW (window); | |
177c0ea7 | 1998 | |
c9f00270 GM |
1999 | if (!NILP (w->hchild)) |
2000 | fake_current_matrices (w->hchild); | |
2001 | else if (!NILP (w->vchild)) | |
2002 | fake_current_matrices (w->vchild); | |
2003 | else | |
2004 | { | |
2005 | int i; | |
2006 | struct frame *f = XFRAME (w->frame); | |
2007 | struct glyph_matrix *m = w->current_matrix; | |
2008 | struct glyph_matrix *fm = f->current_matrix; | |
2009 | ||
7df02016 KS |
2010 | xassert (m->matrix_h == WINDOW_TOTAL_LINES (w)); |
2011 | xassert (m->matrix_w == WINDOW_TOTAL_COLS (w)); | |
177c0ea7 | 2012 | |
c9f00270 GM |
2013 | for (i = 0; i < m->matrix_h; ++i) |
2014 | { | |
2015 | struct glyph_row *r = m->rows + i; | |
7df02016 | 2016 | struct glyph_row *fr = fm->rows + i + WINDOW_TOP_EDGE_LINE (w); |
c9f00270 GM |
2017 | |
2018 | xassert (r->glyphs[TEXT_AREA] >= fr->glyphs[TEXT_AREA] | |
2019 | && r->glyphs[LAST_AREA] <= fr->glyphs[LAST_AREA]); | |
2020 | ||
2021 | r->enabled_p = fr->enabled_p; | |
2022 | if (r->enabled_p) | |
2023 | { | |
2024 | r->used[LEFT_MARGIN_AREA] = m->left_margin_glyphs; | |
2025 | r->used[RIGHT_MARGIN_AREA] = m->right_margin_glyphs; | |
2026 | r->used[TEXT_AREA] = (m->matrix_w | |
2027 | - r->used[LEFT_MARGIN_AREA] | |
2028 | - r->used[RIGHT_MARGIN_AREA]); | |
2029 | r->mode_line_p = 0; | |
c9f00270 GM |
2030 | } |
2031 | } | |
2032 | } | |
2033 | } | |
2034 | } | |
2035 | ||
2036 | ||
bccee4f2 | 2037 | /* Save away the contents of frame F's current frame matrix. Value is |
153a073c | 2038 | a glyph matrix holding the contents of F's current frame matrix. */ |
c9f00270 | 2039 | |
bccee4f2 | 2040 | static struct glyph_matrix * |
971de7fb | 2041 | save_current_matrix (struct frame *f) |
c9f00270 | 2042 | { |
bccee4f2 GM |
2043 | int i; |
2044 | struct glyph_matrix *saved; | |
e797dea6 | 2045 | |
bccee4f2 | 2046 | saved = (struct glyph_matrix *) xmalloc (sizeof *saved); |
72af86bd | 2047 | memset (saved, 0, sizeof *saved); |
bccee4f2 GM |
2048 | saved->nrows = f->current_matrix->nrows; |
2049 | saved->rows = (struct glyph_row *) xmalloc (saved->nrows | |
2050 | * sizeof *saved->rows); | |
72af86bd | 2051 | memset (saved->rows, 0, saved->nrows * sizeof *saved->rows); |
bccee4f2 GM |
2052 | |
2053 | for (i = 0; i < saved->nrows; ++i) | |
31798cfe | 2054 | { |
bccee4f2 GM |
2055 | struct glyph_row *from = f->current_matrix->rows + i; |
2056 | struct glyph_row *to = saved->rows + i; | |
dfd153ae | 2057 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
bccee4f2 | 2058 | to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes); |
72af86bd | 2059 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
bccee4f2 | 2060 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
e797dea6 | 2061 | } |
bccee4f2 GM |
2062 | |
2063 | return saved; | |
2064 | } | |
2065 | ||
2066 | ||
2067 | /* Restore the contents of frame F's current frame matrix from SAVED, | |
2068 | and free memory associated with SAVED. */ | |
2069 | ||
2070 | static void | |
971de7fb | 2071 | restore_current_matrix (struct frame *f, struct glyph_matrix *saved) |
bccee4f2 GM |
2072 | { |
2073 | int i; | |
2074 | ||
2075 | for (i = 0; i < saved->nrows; ++i) | |
e797dea6 | 2076 | { |
bccee4f2 GM |
2077 | struct glyph_row *from = saved->rows + i; |
2078 | struct glyph_row *to = f->current_matrix->rows + i; | |
dfd153ae | 2079 | ptrdiff_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph); |
72af86bd | 2080 | memcpy (to->glyphs[TEXT_AREA], from->glyphs[TEXT_AREA], nbytes); |
e797dea6 | 2081 | to->used[TEXT_AREA] = from->used[TEXT_AREA]; |
bccee4f2 | 2082 | xfree (from->glyphs[TEXT_AREA]); |
e797dea6 | 2083 | } |
177c0ea7 | 2084 | |
bccee4f2 GM |
2085 | xfree (saved->rows); |
2086 | xfree (saved); | |
c9f00270 GM |
2087 | } |
2088 | ||
2089 | ||
bccee4f2 | 2090 | |
5f5c8ee5 GM |
2091 | /* Allocate/reallocate glyph matrices of a single frame F for |
2092 | frame-based redisplay. */ | |
2093 | ||
2094 | static void | |
971de7fb | 2095 | adjust_frame_glyphs_for_frame_redisplay (struct frame *f) |
5f5c8ee5 | 2096 | { |
5f5c8ee5 GM |
2097 | struct dim matrix_dim; |
2098 | int pool_changed_p; | |
2099 | int window_change_flags; | |
2100 | int top_window_y; | |
2101 | ||
2102 | if (!FRAME_LIVE_P (f)) | |
2103 | return; | |
2104 | ||
5f5c8ee5 GM |
2105 | top_window_y = FRAME_TOP_MARGIN (f); |
2106 | ||
2107 | /* Allocate glyph pool structures if not already done. */ | |
2108 | if (f->desired_pool == NULL) | |
2109 | { | |
2110 | f->desired_pool = new_glyph_pool (); | |
2111 | f->current_pool = new_glyph_pool (); | |
2112 | } | |
2113 | ||
2114 | /* Allocate frames matrix structures if needed. */ | |
2115 | if (f->desired_matrix == NULL) | |
2116 | { | |
2117 | f->desired_matrix = new_glyph_matrix (f->desired_pool); | |
2118 | f->current_matrix = new_glyph_matrix (f->current_pool); | |
2119 | } | |
177c0ea7 | 2120 | |
5f5c8ee5 GM |
2121 | /* Compute window glyph matrices. (This takes the mini-buffer |
2122 | window into account). The result is the size of the frame glyph | |
2123 | matrix needed. The variable window_change_flags is set to a bit | |
2124 | mask indicating whether new matrices will be allocated or | |
2125 | existing matrices change their size or location within the frame | |
2126 | matrix. */ | |
2127 | window_change_flags = 0; | |
2128 | matrix_dim | |
2129 | = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
2130 | 0, top_window_y, | |
5d3cc43c | 2131 | 1, |
5f5c8ee5 GM |
2132 | &window_change_flags); |
2133 | ||
2134 | /* Add in menu bar lines, if any. */ | |
2135 | matrix_dim.height += top_window_y; | |
2136 | ||
2137 | /* Enlarge pools as necessary. */ | |
2138 | pool_changed_p = realloc_glyph_pool (f->desired_pool, matrix_dim); | |
2139 | realloc_glyph_pool (f->current_pool, matrix_dim); | |
2140 | ||
177c0ea7 | 2141 | /* Set up glyph pointers within window matrices. Do this only if |
5f5c8ee5 GM |
2142 | absolutely necessary since it requires a frame redraw. */ |
2143 | if (pool_changed_p || window_change_flags) | |
2144 | { | |
2145 | /* Do it for window matrices. */ | |
2146 | allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f), | |
5d3cc43c | 2147 | 0, top_window_y, 0, |
5f5c8ee5 GM |
2148 | &window_change_flags); |
2149 | ||
2150 | /* Size of frame matrices must equal size of frame. Note | |
2151 | that we are called for X frames with window widths NOT equal | |
2152 | to the frame width (from CHANGE_FRAME_SIZE_1). */ | |
7df02016 KS |
2153 | xassert (matrix_dim.width == FRAME_COLS (f) |
2154 | && matrix_dim.height == FRAME_LINES (f)); | |
177c0ea7 | 2155 | |
e797dea6 GM |
2156 | /* Pointers to glyph memory in glyph rows are exchanged during |
2157 | the update phase of redisplay, which means in general that a | |
2158 | frame's current matrix consists of pointers into both the | |
2159 | desired and current glyph pool of the frame. Adjusting a | |
2160 | matrix sets the frame matrix up so that pointers are all into | |
2161 | the same pool. If we want to preserve glyph contents of the | |
2162 | current matrix over a call to adjust_glyph_matrix, we must | |
2163 | make a copy of the current glyphs, and restore the current | |
2164 | matrix' contents from that copy. */ | |
2165 | if (display_completed | |
2166 | && !FRAME_GARBAGED_P (f) | |
2167 | && matrix_dim.width == f->current_matrix->matrix_w | |
075757cc CY |
2168 | && matrix_dim.height == f->current_matrix->matrix_h |
2169 | /* For some reason, the frame glyph matrix gets corrupted if | |
2170 | any of the windows contain margins. I haven't been able | |
2171 | to hunt down the reason, but for the moment this prevents | |
2172 | the problem from manifesting. -- cyd */ | |
2173 | && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f)))) | |
e797dea6 | 2174 | { |
bccee4f2 GM |
2175 | struct glyph_matrix *copy = save_current_matrix (f); |
2176 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); | |
e797dea6 | 2177 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
bccee4f2 | 2178 | restore_current_matrix (f, copy); |
e797dea6 GM |
2179 | fake_current_matrices (FRAME_ROOT_WINDOW (f)); |
2180 | } | |
c9f00270 | 2181 | else |
e797dea6 | 2182 | { |
bccee4f2 | 2183 | adjust_glyph_matrix (NULL, f->desired_matrix, 0, 0, matrix_dim); |
e797dea6 GM |
2184 | adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim); |
2185 | SET_FRAME_GARBAGED (f); | |
2186 | } | |
5f5c8ee5 GM |
2187 | } |
2188 | } | |
2189 | ||
2190 | ||
2191 | /* Allocate/reallocate glyph matrices of a single frame F for | |
2192 | window-based redisplay. */ | |
2193 | ||
2194 | static void | |
971de7fb | 2195 | adjust_frame_glyphs_for_window_redisplay (struct frame *f) |
5f5c8ee5 | 2196 | { |
5f5c8ee5 | 2197 | xassert (FRAME_WINDOW_P (f) && FRAME_LIVE_P (f)); |
177c0ea7 | 2198 | |
5f5c8ee5 | 2199 | /* Allocate/reallocate window matrices. */ |
5d3cc43c | 2200 | allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f))); |
5f5c8ee5 | 2201 | |
8ce2650d | 2202 | #ifdef HAVE_X_WINDOWS |
5f5c8ee5 GM |
2203 | /* Allocate/ reallocate matrices of the dummy window used to display |
2204 | the menu bar under X when no X toolkit support is available. */ | |
488dd4c4 | 2205 | #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK) |
5f5c8ee5 GM |
2206 | { |
2207 | /* Allocate a dummy window if not already done. */ | |
d2d37ddc | 2208 | struct window *w; |
5f5c8ee5 GM |
2209 | if (NILP (f->menu_bar_window)) |
2210 | { | |
2211 | f->menu_bar_window = make_window (); | |
2212 | w = XWINDOW (f->menu_bar_window); | |
2213 | XSETFRAME (w->frame, f); | |
2214 | w->pseudo_window_p = 1; | |
2215 | } | |
2216 | else | |
2217 | w = XWINDOW (f->menu_bar_window); | |
2218 | ||
2219 | /* Set window dimensions to frame dimensions and allocate or | |
2220 | adjust glyph matrices of W. */ | |
7df02016 KS |
2221 | XSETFASTINT (w->top_line, 0); |
2222 | XSETFASTINT (w->left_col, 0); | |
2223 | XSETFASTINT (w->total_lines, FRAME_MENU_BAR_LINES (f)); | |
2224 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
5d3cc43c | 2225 | allocate_matrices_for_window_redisplay (w); |
5f5c8ee5 | 2226 | } |
57714a86 YM |
2227 | #endif /* not USE_X_TOOLKIT && not USE_GTK */ |
2228 | #endif /* HAVE_X_WINDOWS */ | |
5f5c8ee5 | 2229 | |
488dd4c4 | 2230 | #ifndef USE_GTK |
d2d37ddc PE |
2231 | { |
2232 | /* Allocate/ reallocate matrices of the tool bar window. If we | |
2233 | don't have a tool bar window yet, make one. */ | |
2234 | struct window *w; | |
2235 | if (NILP (f->tool_bar_window)) | |
2236 | { | |
2237 | f->tool_bar_window = make_window (); | |
2238 | w = XWINDOW (f->tool_bar_window); | |
2239 | XSETFRAME (w->frame, f); | |
2240 | w->pseudo_window_p = 1; | |
2241 | } | |
2242 | else | |
9ea173e8 | 2243 | w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 2244 | |
d2d37ddc PE |
2245 | XSETFASTINT (w->top_line, FRAME_MENU_BAR_LINES (f)); |
2246 | XSETFASTINT (w->left_col, 0); | |
2247 | XSETFASTINT (w->total_lines, FRAME_TOOL_BAR_LINES (f)); | |
2248 | XSETFASTINT (w->total_cols, FRAME_TOTAL_COLS (f)); | |
2249 | allocate_matrices_for_window_redisplay (w); | |
2250 | } | |
488dd4c4 | 2251 | #endif |
5f5c8ee5 GM |
2252 | } |
2253 | ||
2254 | ||
177c0ea7 | 2255 | /* Adjust/ allocate message buffer of frame F. |
5f5c8ee5 | 2256 | |
5f5c8ee5 GM |
2257 | Note that the message buffer is never freed. Since I could not |
2258 | find a free in 19.34, I assume that freeing it would be | |
2259 | problematic in some way and don't do it either. | |
2260 | ||
2261 | (Implementation note: It should be checked if we can free it | |
2262 | eventually without causing trouble). */ | |
2263 | ||
2264 | static void | |
971de7fb | 2265 | adjust_frame_message_buffer (struct frame *f) |
5f5c8ee5 | 2266 | { |
dfd153ae | 2267 | ptrdiff_t size = FRAME_MESSAGE_BUF_SIZE (f) + 1; |
5f5c8ee5 GM |
2268 | |
2269 | if (FRAME_MESSAGE_BUF (f)) | |
2270 | { | |
2271 | char *buffer = FRAME_MESSAGE_BUF (f); | |
2272 | char *new_buffer = (char *) xrealloc (buffer, size); | |
5f5c8ee5 GM |
2273 | FRAME_MESSAGE_BUF (f) = new_buffer; |
2274 | } | |
2275 | else | |
2276 | FRAME_MESSAGE_BUF (f) = (char *) xmalloc (size); | |
2277 | } | |
2278 | ||
2279 | ||
2280 | /* Re-allocate buffer for decode_mode_spec on frame F. */ | |
2281 | ||
2282 | static void | |
971de7fb | 2283 | adjust_decode_mode_spec_buffer (struct frame *f) |
5f5c8ee5 GM |
2284 | { |
2285 | f->decode_mode_spec_buffer | |
2286 | = (char *) xrealloc (f->decode_mode_spec_buffer, | |
2287 | FRAME_MESSAGE_BUF_SIZE (f) + 1); | |
2288 | } | |
2289 | ||
2290 | ||
2291 | \f | |
2292 | /********************************************************************** | |
2293 | Freeing Glyph Matrices | |
2294 | **********************************************************************/ | |
2295 | ||
2296 | /* Free glyph memory for a frame F. F may be null. This function can | |
2297 | be called for the same frame more than once. The root window of | |
2298 | F may be nil when this function is called. This is the case when | |
2299 | the function is called when F is destroyed. */ | |
2300 | ||
2301 | void | |
971de7fb | 2302 | free_glyphs (struct frame *f) |
5f5c8ee5 GM |
2303 | { |
2304 | if (f && f->glyphs_initialized_p) | |
2305 | { | |
42f55fe0 GM |
2306 | /* Block interrupt input so that we don't get surprised by an X |
2307 | event while we're in an inconsistent state. */ | |
2308 | BLOCK_INPUT; | |
5f5c8ee5 | 2309 | f->glyphs_initialized_p = 0; |
177c0ea7 | 2310 | |
5f5c8ee5 GM |
2311 | /* Release window sub-matrices. */ |
2312 | if (!NILP (f->root_window)) | |
2313 | free_window_matrices (XWINDOW (f->root_window)); | |
2314 | ||
2315 | /* Free the dummy window for menu bars without X toolkit and its | |
2316 | glyph matrices. */ | |
2317 | if (!NILP (f->menu_bar_window)) | |
2318 | { | |
2319 | struct window *w = XWINDOW (f->menu_bar_window); | |
2320 | free_glyph_matrix (w->desired_matrix); | |
2321 | free_glyph_matrix (w->current_matrix); | |
2322 | w->desired_matrix = w->current_matrix = NULL; | |
2323 | f->menu_bar_window = Qnil; | |
2324 | } | |
2325 | ||
9ea173e8 GM |
2326 | /* Free the tool bar window and its glyph matrices. */ |
2327 | if (!NILP (f->tool_bar_window)) | |
5f5c8ee5 | 2328 | { |
9ea173e8 | 2329 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
2330 | free_glyph_matrix (w->desired_matrix); |
2331 | free_glyph_matrix (w->current_matrix); | |
2332 | w->desired_matrix = w->current_matrix = NULL; | |
9ea173e8 | 2333 | f->tool_bar_window = Qnil; |
5f5c8ee5 GM |
2334 | } |
2335 | ||
2336 | /* Release frame glyph matrices. Reset fields to zero in | |
2337 | case we are called a second time. */ | |
2338 | if (f->desired_matrix) | |
2339 | { | |
2340 | free_glyph_matrix (f->desired_matrix); | |
2341 | free_glyph_matrix (f->current_matrix); | |
2342 | f->desired_matrix = f->current_matrix = NULL; | |
2343 | } | |
2344 | ||
2345 | /* Release glyph pools. */ | |
2346 | if (f->desired_pool) | |
2347 | { | |
2348 | free_glyph_pool (f->desired_pool); | |
2349 | free_glyph_pool (f->current_pool); | |
2350 | f->desired_pool = f->current_pool = NULL; | |
2351 | } | |
177c0ea7 | 2352 | |
42f55fe0 | 2353 | UNBLOCK_INPUT; |
5f5c8ee5 GM |
2354 | } |
2355 | } | |
2356 | ||
2357 | ||
2358 | /* Free glyph sub-matrices in the window tree rooted at W. This | |
2359 | function may be called with a null pointer, and it may be called on | |
2360 | the same tree more than once. */ | |
2361 | ||
2362 | void | |
971de7fb | 2363 | free_window_matrices (struct window *w) |
5f5c8ee5 GM |
2364 | { |
2365 | while (w) | |
2366 | { | |
2367 | if (!NILP (w->hchild)) | |
2368 | free_window_matrices (XWINDOW (w->hchild)); | |
2369 | else if (!NILP (w->vchild)) | |
2370 | free_window_matrices (XWINDOW (w->vchild)); | |
177c0ea7 | 2371 | else |
5f5c8ee5 GM |
2372 | { |
2373 | /* This is a leaf window. Free its memory and reset fields | |
2374 | to zero in case this function is called a second time for | |
2375 | W. */ | |
2376 | free_glyph_matrix (w->current_matrix); | |
2377 | free_glyph_matrix (w->desired_matrix); | |
2378 | w->current_matrix = w->desired_matrix = NULL; | |
2379 | } | |
2380 | ||
2381 | /* Next window on same level. */ | |
2382 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | ||
2387 | /* Check glyph memory leaks. This function is called from | |
2388 | shut_down_emacs. Note that frames are not destroyed when Emacs | |
2389 | exits. We therefore free all glyph memory for all active frames | |
2390 | explicitly and check that nothing is left allocated. */ | |
2391 | ||
2392 | void | |
971de7fb | 2393 | check_glyph_memory (void) |
5f5c8ee5 GM |
2394 | { |
2395 | Lisp_Object tail, frame; | |
2396 | ||
2397 | /* Free glyph memory for all frames. */ | |
2398 | FOR_EACH_FRAME (tail, frame) | |
2399 | free_glyphs (XFRAME (frame)); | |
2400 | ||
2401 | /* Check that nothing is left allocated. */ | |
2402 | if (glyph_matrix_count) | |
2403 | abort (); | |
2404 | if (glyph_pool_count) | |
2405 | abort (); | |
2406 | } | |
2407 | ||
2408 | ||
2409 | \f | |
2410 | /********************************************************************** | |
2411 | Building a Frame Matrix | |
2412 | **********************************************************************/ | |
2413 | ||
2414 | /* Most of the redisplay code works on glyph matrices attached to | |
2415 | windows. This is a good solution most of the time, but it is not | |
2416 | suitable for terminal code. Terminal output functions cannot rely | |
2417 | on being able to set an arbitrary terminal window. Instead they | |
2418 | must be provided with a view of the whole frame, i.e. the whole | |
2419 | screen. We build such a view by constructing a frame matrix from | |
2420 | window matrices in this section. | |
2421 | ||
2422 | Windows that must be updated have their must_be_update_p flag set. | |
2423 | For all such windows, their desired matrix is made part of the | |
2424 | desired frame matrix. For other windows, their current matrix is | |
2425 | made part of the desired frame matrix. | |
2426 | ||
2427 | +-----------------+----------------+ | |
2428 | | desired | desired | | |
2429 | | | | | |
2430 | +-----------------+----------------+ | |
2431 | | current | | |
2432 | | | | |
2433 | +----------------------------------+ | |
2434 | ||
2435 | Desired window matrices can be made part of the frame matrix in a | |
2436 | cheap way: We exploit the fact that the desired frame matrix and | |
2437 | desired window matrices share their glyph memory. This is not | |
2438 | possible for current window matrices. Their glyphs are copied to | |
2439 | the desired frame matrix. The latter is equivalent to | |
2440 | preserve_other_columns in the old redisplay. | |
2441 | ||
2442 | Used glyphs counters for frame matrix rows are the result of adding | |
2443 | up glyph lengths of the window matrices. A line in the frame | |
2444 | matrix is enabled, if a corresponding line in a window matrix is | |
2445 | enabled. | |
177c0ea7 | 2446 | |
5f5c8ee5 GM |
2447 | After building the desired frame matrix, it will be passed to |
2448 | terminal code, which will manipulate both the desired and current | |
2449 | frame matrix. Changes applied to the frame's current matrix have | |
2450 | to be visible in current window matrices afterwards, of course. | |
2451 | ||
2452 | This problem is solved like this: | |
2453 | ||
2454 | 1. Window and frame matrices share glyphs. Window matrices are | |
2455 | constructed in a way that their glyph contents ARE the glyph | |
2456 | contents needed in a frame matrix. Thus, any modification of | |
2457 | glyphs done in terminal code will be reflected in window matrices | |
2458 | automatically. | |
177c0ea7 | 2459 | |
5f5c8ee5 GM |
2460 | 2. Exchanges of rows in a frame matrix done by terminal code are |
2461 | intercepted by hook functions so that corresponding row operations | |
2462 | on window matrices can be performed. This is necessary because we | |
2463 | use pointers to glyphs in glyph row structures. To satisfy the | |
2464 | assumption of point 1 above that glyphs are updated implicitly in | |
2465 | window matrices when they are manipulated via the frame matrix, | |
2466 | window and frame matrix must of course agree where to find the | |
2467 | glyphs for their rows. Possible manipulations that must be | |
2468 | mirrored are assignments of rows of the desired frame matrix to the | |
2469 | current frame matrix and scrolling the current frame matrix. */ | |
2470 | ||
2471 | /* Build frame F's desired matrix from window matrices. Only windows | |
2472 | which have the flag must_be_updated_p set have to be updated. Menu | |
2473 | bar lines of a frame are not covered by window matrices, so make | |
2474 | sure not to touch them in this function. */ | |
2475 | ||
2476 | static void | |
971de7fb | 2477 | build_frame_matrix (struct frame *f) |
5f5c8ee5 GM |
2478 | { |
2479 | int i; | |
2480 | ||
2481 | /* F must have a frame matrix when this function is called. */ | |
2482 | xassert (!FRAME_WINDOW_P (f)); | |
177c0ea7 | 2483 | |
5f5c8ee5 GM |
2484 | /* Clear all rows in the frame matrix covered by window matrices. |
2485 | Menu bar lines are not covered by windows. */ | |
2486 | for (i = FRAME_TOP_MARGIN (f); i < f->desired_matrix->nrows; ++i) | |
2487 | clear_glyph_row (MATRIX_ROW (f->desired_matrix, i)); | |
2488 | ||
2489 | /* Build the matrix by walking the window tree. */ | |
2490 | build_frame_matrix_from_window_tree (f->desired_matrix, | |
2491 | XWINDOW (FRAME_ROOT_WINDOW (f))); | |
2492 | } | |
2493 | ||
2494 | ||
2495 | /* Walk a window tree, building a frame matrix MATRIX from window | |
2496 | matrices. W is the root of a window tree. */ | |
2497 | ||
2498 | static void | |
971de7fb | 2499 | build_frame_matrix_from_window_tree (struct glyph_matrix *matrix, struct window *w) |
5f5c8ee5 GM |
2500 | { |
2501 | while (w) | |
2502 | { | |
2503 | if (!NILP (w->hchild)) | |
2504 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->hchild)); | |
2505 | else if (!NILP (w->vchild)) | |
2506 | build_frame_matrix_from_window_tree (matrix, XWINDOW (w->vchild)); | |
2507 | else | |
2508 | build_frame_matrix_from_leaf_window (matrix, w); | |
2509 | ||
2510 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
2511 | } | |
2512 | } | |
2513 | ||
2514 | ||
2515 | /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the | |
2516 | desired frame matrix built. W is a leaf window whose desired or | |
2517 | current matrix is to be added to FRAME_MATRIX. W's flag | |
2518 | must_be_updated_p determines which matrix it contributes to | |
2519 | FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix | |
2520 | is added to FRAME_MATRIX, otherwise W's current matrix is added. | |
2521 | Adding a desired matrix means setting up used counters and such in | |
2522 | frame rows, while adding a current window matrix to FRAME_MATRIX | |
2523 | means copying glyphs. The latter case corresponds to | |
2524 | preserve_other_columns in the old redisplay. */ | |
2525 | ||
2526 | static void | |
971de7fb | 2527 | build_frame_matrix_from_leaf_window (struct glyph_matrix *frame_matrix, struct window *w) |
5f5c8ee5 GM |
2528 | { |
2529 | struct glyph_matrix *window_matrix; | |
2530 | int window_y, frame_y; | |
2531 | /* If non-zero, a glyph to insert at the right border of W. */ | |
3fc809e2 KS |
2532 | GLYPH right_border_glyph; |
2533 | ||
2534 | SET_GLYPH_FROM_CHAR (right_border_glyph, 0); | |
5f5c8ee5 GM |
2535 | |
2536 | /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */ | |
2537 | if (w->must_be_updated_p) | |
2538 | { | |
2539 | window_matrix = w->desired_matrix; | |
2540 | ||
2541 | /* Decide whether we want to add a vertical border glyph. */ | |
2542 | if (!WINDOW_RIGHTMOST_P (w)) | |
2543 | { | |
2544 | struct Lisp_Char_Table *dp = window_display_table (w); | |
3fc809e2 | 2545 | Lisp_Object gc; |
b4e49aee | 2546 | |
3fc809e2 KS |
2547 | SET_GLYPH_FROM_CHAR (right_border_glyph, '|'); |
2548 | if (dp | |
2549 | && (gc = DISP_BORDER_GLYPH (dp), GLYPH_CODE_P (gc)) | |
2550 | && GLYPH_CODE_CHAR_VALID_P (gc)) | |
2551 | { | |
2552 | SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph, gc); | |
2553 | spec_glyph_lookup_face (w, &right_border_glyph); | |
2554 | } | |
b4e49aee | 2555 | |
3fc809e2 KS |
2556 | if (GLYPH_FACE (right_border_glyph) <= 0) |
2557 | SET_GLYPH_FACE (right_border_glyph, VERTICAL_BORDER_FACE_ID); | |
5f5c8ee5 GM |
2558 | } |
2559 | } | |
2560 | else | |
2561 | window_matrix = w->current_matrix; | |
2562 | ||
2563 | /* For all rows in the window matrix and corresponding rows in the | |
2564 | frame matrix. */ | |
2565 | window_y = 0; | |
2566 | frame_y = window_matrix->matrix_y; | |
2567 | while (window_y < window_matrix->nrows) | |
2568 | { | |
2569 | struct glyph_row *frame_row = frame_matrix->rows + frame_y; | |
2570 | struct glyph_row *window_row = window_matrix->rows + window_y; | |
2a8bd25f | 2571 | int current_row_p = window_matrix == w->current_matrix; |
5f5c8ee5 GM |
2572 | |
2573 | /* Fill up the frame row with spaces up to the left margin of the | |
2574 | window row. */ | |
2575 | fill_up_frame_row_with_spaces (frame_row, window_matrix->matrix_x); | |
2576 | ||
2577 | /* Fill up areas in the window matrix row with spaces. */ | |
2578 | fill_up_glyph_row_with_spaces (window_row); | |
2a8bd25f GM |
2579 | |
2580 | /* If only part of W's desired matrix has been built, and | |
2581 | window_row wasn't displayed, use the corresponding current | |
2582 | row instead. */ | |
2583 | if (window_matrix == w->desired_matrix | |
2584 | && !window_row->enabled_p) | |
2585 | { | |
2586 | window_row = w->current_matrix->rows + window_y; | |
2587 | current_row_p = 1; | |
2588 | } | |
177c0ea7 | 2589 | |
2a8bd25f | 2590 | if (current_row_p) |
5f5c8ee5 | 2591 | { |
2a8bd25f | 2592 | /* Copy window row to frame row. */ |
72af86bd AS |
2593 | memcpy (frame_row->glyphs[TEXT_AREA] + window_matrix->matrix_x, |
2594 | window_row->glyphs[0], | |
2595 | window_matrix->matrix_w * sizeof (struct glyph)); | |
5f5c8ee5 GM |
2596 | } |
2597 | else | |
2598 | { | |
2a8bd25f | 2599 | xassert (window_row->enabled_p); |
177c0ea7 | 2600 | |
2a8bd25f GM |
2601 | /* Only when a desired row has been displayed, we want |
2602 | the corresponding frame row to be updated. */ | |
2603 | frame_row->enabled_p = 1; | |
177c0ea7 | 2604 | |
5f5c8ee5 GM |
2605 | /* Maybe insert a vertical border between horizontally adjacent |
2606 | windows. */ | |
3fc809e2 | 2607 | if (GLYPH_CHAR (right_border_glyph) != 0) |
5f5c8ee5 GM |
2608 | { |
2609 | struct glyph *border = window_row->glyphs[LAST_AREA] - 1; | |
2610 | SET_CHAR_GLYPH_FROM_GLYPH (*border, right_border_glyph); | |
2611 | } | |
2612 | ||
498c08ea | 2613 | #if GLYPH_DEBUG |
a13396c9 GM |
2614 | /* Window row window_y must be a slice of frame row |
2615 | frame_y. */ | |
5f5c8ee5 | 2616 | xassert (glyph_row_slice_p (window_row, frame_row)); |
177c0ea7 | 2617 | |
5f5c8ee5 GM |
2618 | /* If rows are in sync, we don't have to copy glyphs because |
2619 | frame and window share glyphs. */ | |
177c0ea7 | 2620 | |
a38634ff | 2621 | strcpy (w->current_matrix->method, w->desired_matrix->method); |
9b0e97aa | 2622 | add_window_display_history (w, w->current_matrix->method, 0); |
a38634ff | 2623 | #endif |
5f5c8ee5 GM |
2624 | } |
2625 | ||
2626 | /* Set number of used glyphs in the frame matrix. Since we fill | |
2627 | up with spaces, and visit leaf windows from left to right it | |
2628 | can be done simply. */ | |
177c0ea7 | 2629 | frame_row->used[TEXT_AREA] |
5f5c8ee5 GM |
2630 | = window_matrix->matrix_x + window_matrix->matrix_w; |
2631 | ||
5f5c8ee5 GM |
2632 | /* Next row. */ |
2633 | ++window_y; | |
2634 | ++frame_y; | |
2635 | } | |
2636 | } | |
2637 | ||
5f81871e RS |
2638 | /* Given a user-specified glyph, possibly including a Lisp-level face |
2639 | ID, return a glyph that has a realized face ID. | |
2640 | This is used for glyphs displayed specially and not part of the text; | |
2641 | for instance, vertical separators, truncation markers, etc. */ | |
2642 | ||
3fc809e2 | 2643 | void |
971de7fb | 2644 | spec_glyph_lookup_face (struct window *w, GLYPH *glyph) |
5f81871e | 2645 | { |
3fc809e2 | 2646 | int lface_id = GLYPH_FACE (*glyph); |
5f81871e RS |
2647 | /* Convert the glyph's specified face to a realized (cache) face. */ |
2648 | if (lface_id > 0) | |
2649 | { | |
2650 | int face_id = merge_faces (XFRAME (w->frame), | |
2651 | Qt, lface_id, DEFAULT_FACE_ID); | |
3fc809e2 | 2652 | SET_GLYPH_FACE (*glyph, face_id); |
5f81871e | 2653 | } |
5f81871e | 2654 | } |
5f5c8ee5 GM |
2655 | |
2656 | /* Add spaces to a glyph row ROW in a window matrix. | |
2657 | ||
2658 | Each row has the form: | |
2659 | ||
2660 | +---------+-----------------------------+------------+ | |
2661 | | left | text | right | | |
2662 | +---------+-----------------------------+------------+ | |
2663 | ||
2664 | Left and right marginal areas are optional. This function adds | |
2665 | spaces to areas so that there are no empty holes between areas. | |
2666 | In other words: If the right area is not empty, the text area | |
2667 | is filled up with spaces up to the right area. If the text area | |
2668 | is not empty, the left area is filled up. | |
2669 | ||
2670 | To be called for frame-based redisplay, only. */ | |
2671 | ||
2672 | static void | |
971de7fb | 2673 | fill_up_glyph_row_with_spaces (struct glyph_row *row) |
5f5c8ee5 GM |
2674 | { |
2675 | fill_up_glyph_row_area_with_spaces (row, LEFT_MARGIN_AREA); | |
2676 | fill_up_glyph_row_area_with_spaces (row, TEXT_AREA); | |
2677 | fill_up_glyph_row_area_with_spaces (row, RIGHT_MARGIN_AREA); | |
2678 | } | |
2679 | ||
2680 | ||
2681 | /* Fill area AREA of glyph row ROW with spaces. To be called for | |
2682 | frame-based redisplay only. */ | |
2683 | ||
2684 | static void | |
971de7fb | 2685 | fill_up_glyph_row_area_with_spaces (struct glyph_row *row, int area) |
5f5c8ee5 GM |
2686 | { |
2687 | if (row->glyphs[area] < row->glyphs[area + 1]) | |
2688 | { | |
2689 | struct glyph *end = row->glyphs[area + 1]; | |
2690 | struct glyph *text = row->glyphs[area] + row->used[area]; | |
2691 | ||
2692 | while (text < end) | |
2693 | *text++ = space_glyph; | |
2694 | row->used[area] = text - row->glyphs[area]; | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | ||
2699 | /* Add spaces to the end of ROW in a frame matrix until index UPTO is | |
2700 | reached. In frame matrices only one area, TEXT_AREA, is used. */ | |
2701 | ||
2702 | static void | |
971de7fb | 2703 | fill_up_frame_row_with_spaces (struct glyph_row *row, int upto) |
5f5c8ee5 GM |
2704 | { |
2705 | int i = row->used[TEXT_AREA]; | |
2706 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
177c0ea7 | 2707 | |
5f5c8ee5 GM |
2708 | while (i < upto) |
2709 | glyph[i++] = space_glyph; | |
2710 | ||
2711 | row->used[TEXT_AREA] = i; | |
2712 | } | |
2713 | ||
2714 | ||
2715 | \f | |
2716 | /********************************************************************** | |
2717 | Mirroring operations on frame matrices in window matrices | |
2718 | **********************************************************************/ | |
2719 | ||
2720 | /* Set frame being updated via frame-based redisplay to F. This | |
2721 | function must be called before updates to make explicit that we are | |
2722 | working on frame matrices or not. */ | |
2723 | ||
55d4c1b2 | 2724 | static inline void |
971de7fb | 2725 | set_frame_matrix_frame (struct frame *f) |
5f5c8ee5 GM |
2726 | { |
2727 | frame_matrix_frame = f; | |
2728 | } | |
2729 | ||
2730 | ||
2731 | /* Make sure glyph row ROW in CURRENT_MATRIX is up to date. | |
2732 | DESIRED_MATRIX is the desired matrix corresponding to | |
2733 | CURRENT_MATRIX. The update is done by exchanging glyph pointers | |
2734 | between rows in CURRENT_MATRIX and DESIRED_MATRIX. If | |
2735 | frame_matrix_frame is non-null, this indicates that the exchange is | |
2736 | done in frame matrices, and that we have to perform analogous | |
2737 | operations in window matrices of frame_matrix_frame. */ | |
2738 | ||
55d4c1b2 | 2739 | static inline void |
971de7fb | 2740 | make_current (struct glyph_matrix *desired_matrix, struct glyph_matrix *current_matrix, int row) |
5f5c8ee5 GM |
2741 | { |
2742 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, row); | |
2743 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, row); | |
e876ff42 | 2744 | int mouse_face_p = current_row->mouse_face_p; |
5f5c8ee5 GM |
2745 | |
2746 | /* Do current_row = desired_row. This exchanges glyph pointers | |
2747 | between both rows, and does a structure assignment otherwise. */ | |
2748 | assign_row (current_row, desired_row); | |
2749 | ||
2750 | /* Enable current_row to mark it as valid. */ | |
2751 | current_row->enabled_p = 1; | |
e876ff42 | 2752 | current_row->mouse_face_p = mouse_face_p; |
5f5c8ee5 GM |
2753 | |
2754 | /* If we are called on frame matrices, perform analogous operations | |
2755 | for window matrices. */ | |
2756 | if (frame_matrix_frame) | |
2757 | mirror_make_current (XWINDOW (frame_matrix_frame->root_window), row); | |
2758 | } | |
2759 | ||
2760 | ||
2761 | /* W is the root of a window tree. FRAME_ROW is the index of a row in | |
2762 | W's frame which has been made current (by swapping pointers between | |
2763 | current and desired matrix). Perform analogous operations in the | |
2764 | matrices of leaf windows in the window tree rooted at W. */ | |
2765 | ||
2766 | static void | |
971de7fb | 2767 | mirror_make_current (struct window *w, int frame_row) |
5f5c8ee5 GM |
2768 | { |
2769 | while (w) | |
2770 | { | |
2771 | if (!NILP (w->hchild)) | |
2772 | mirror_make_current (XWINDOW (w->hchild), frame_row); | |
2773 | else if (!NILP (w->vchild)) | |
2774 | mirror_make_current (XWINDOW (w->vchild), frame_row); | |
2775 | else | |
2776 | { | |
2777 | /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS | |
2778 | here because the checks performed in debug mode there | |
2779 | will not allow the conversion. */ | |
2780 | int row = frame_row - w->desired_matrix->matrix_y; | |
2781 | ||
2782 | /* If FRAME_ROW is within W, assign the desired row to the | |
2783 | current row (exchanging glyph pointers). */ | |
2784 | if (row >= 0 && row < w->desired_matrix->matrix_h) | |
2785 | { | |
2786 | struct glyph_row *current_row | |
2787 | = MATRIX_ROW (w->current_matrix, row); | |
2788 | struct glyph_row *desired_row | |
2789 | = MATRIX_ROW (w->desired_matrix, row); | |
a38634ff GM |
2790 | |
2791 | if (desired_row->enabled_p) | |
2792 | assign_row (current_row, desired_row); | |
2793 | else | |
2794 | swap_glyph_pointers (desired_row, current_row); | |
5f5c8ee5 | 2795 | current_row->enabled_p = 1; |
d009ae66 EZ |
2796 | |
2797 | /* Set the Y coordinate of the mode/header line's row. | |
2798 | It is needed in draw_row_with_mouse_face to find the | |
2799 | screen coordinates. (Window-based redisplay sets | |
2800 | this in update_window, but no one seems to do that | |
2801 | for frame-based redisplay.) */ | |
2802 | if (current_row->mode_line_p) | |
2803 | current_row->y = row; | |
5f5c8ee5 GM |
2804 | } |
2805 | } | |
177c0ea7 | 2806 | |
5f5c8ee5 GM |
2807 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2808 | } | |
2809 | } | |
2810 | ||
2811 | ||
2812 | /* Perform row dance after scrolling. We are working on the range of | |
2813 | lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not | |
2814 | including) in MATRIX. COPY_FROM is a vector containing, for each | |
2815 | row I in the range 0 <= I < NLINES, the index of the original line | |
2816 | to move to I. This index is relative to the row range, i.e. 0 <= | |
2817 | index < NLINES. RETAINED_P is a vector containing zero for each | |
2818 | row 0 <= I < NLINES which is empty. | |
2819 | ||
2820 | This function is called from do_scrolling and do_direct_scrolling. */ | |
177c0ea7 | 2821 | |
5f5c8ee5 | 2822 | void |
6f704c76 DN |
2823 | mirrored_line_dance (struct glyph_matrix *matrix, int unchanged_at_top, int nlines, |
2824 | int *copy_from, char *retained_p) | |
5f5c8ee5 GM |
2825 | { |
2826 | /* A copy of original rows. */ | |
2827 | struct glyph_row *old_rows; | |
2828 | ||
2829 | /* Rows to assign to. */ | |
2830 | struct glyph_row *new_rows = MATRIX_ROW (matrix, unchanged_at_top); | |
177c0ea7 | 2831 | |
5f5c8ee5 GM |
2832 | int i; |
2833 | ||
2834 | /* Make a copy of the original rows. */ | |
2835 | old_rows = (struct glyph_row *) alloca (nlines * sizeof *old_rows); | |
72af86bd | 2836 | memcpy (old_rows, new_rows, nlines * sizeof *old_rows); |
5f5c8ee5 GM |
2837 | |
2838 | /* Assign new rows, maybe clear lines. */ | |
2839 | for (i = 0; i < nlines; ++i) | |
2840 | { | |
2841 | int enabled_before_p = new_rows[i].enabled_p; | |
2842 | ||
2843 | xassert (i + unchanged_at_top < matrix->nrows); | |
2844 | xassert (unchanged_at_top + copy_from[i] < matrix->nrows); | |
2845 | new_rows[i] = old_rows[copy_from[i]]; | |
2846 | new_rows[i].enabled_p = enabled_before_p; | |
2847 | ||
2848 | /* RETAINED_P is zero for empty lines. */ | |
2849 | if (!retained_p[copy_from[i]]) | |
2850 | new_rows[i].enabled_p = 0; | |
2851 | } | |
2852 | ||
153a073c | 2853 | /* Do the same for window matrices, if MATRIX is a frame matrix. */ |
5f5c8ee5 GM |
2854 | if (frame_matrix_frame) |
2855 | mirror_line_dance (XWINDOW (frame_matrix_frame->root_window), | |
2856 | unchanged_at_top, nlines, copy_from, retained_p); | |
2857 | } | |
2858 | ||
2859 | ||
a13396c9 | 2860 | /* Synchronize glyph pointers in the current matrix of window W with |
5cb88111 | 2861 | the current frame matrix. */ |
a13396c9 GM |
2862 | |
2863 | static void | |
971de7fb | 2864 | sync_window_with_frame_matrix_rows (struct window *w) |
a13396c9 GM |
2865 | { |
2866 | struct frame *f = XFRAME (w->frame); | |
2867 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
075c507b | 2868 | int left, right, x, width; |
a13396c9 | 2869 | |
5cb88111 | 2870 | /* Preconditions: W must be a leaf window on a tty frame. */ |
a13396c9 | 2871 | xassert (NILP (w->hchild) && NILP (w->vchild)); |
a13396c9 GM |
2872 | xassert (!FRAME_WINDOW_P (f)); |
2873 | ||
7df02016 KS |
2874 | left = margin_glyphs_to_reserve (w, 1, w->left_margin_cols); |
2875 | right = margin_glyphs_to_reserve (w, 1, w->right_margin_cols); | |
5cb88111 GM |
2876 | x = w->current_matrix->matrix_x; |
2877 | width = w->current_matrix->matrix_w; | |
2878 | ||
a13396c9 GM |
2879 | window_row = w->current_matrix->rows; |
2880 | window_row_end = window_row + w->current_matrix->nrows; | |
7df02016 | 2881 | frame_row = f->current_matrix->rows + WINDOW_TOP_EDGE_LINE (w); |
177c0ea7 | 2882 | |
5cb88111 | 2883 | for (; window_row < window_row_end; ++window_row, ++frame_row) |
a13396c9 | 2884 | { |
5cb88111 GM |
2885 | window_row->glyphs[LEFT_MARGIN_AREA] |
2886 | = frame_row->glyphs[0] + x; | |
2887 | window_row->glyphs[TEXT_AREA] | |
2888 | = window_row->glyphs[LEFT_MARGIN_AREA] + left; | |
2889 | window_row->glyphs[LAST_AREA] | |
2890 | = window_row->glyphs[LEFT_MARGIN_AREA] + width; | |
2891 | window_row->glyphs[RIGHT_MARGIN_AREA] | |
2892 | = window_row->glyphs[LAST_AREA] - right; | |
a13396c9 GM |
2893 | } |
2894 | } | |
2895 | ||
2896 | ||
2897 | /* Return the window in the window tree rooted in W containing frame | |
2898 | row ROW. Value is null if none is found. */ | |
2899 | ||
09ad5a91 | 2900 | static struct window * |
971de7fb | 2901 | frame_row_to_window (struct window *w, int row) |
a13396c9 GM |
2902 | { |
2903 | struct window *found = NULL; | |
177c0ea7 | 2904 | |
a13396c9 GM |
2905 | while (w && !found) |
2906 | { | |
2907 | if (!NILP (w->hchild)) | |
2908 | found = frame_row_to_window (XWINDOW (w->hchild), row); | |
2909 | else if (!NILP (w->vchild)) | |
2910 | found = frame_row_to_window (XWINDOW (w->vchild), row); | |
7df02016 KS |
2911 | else if (row >= WINDOW_TOP_EDGE_LINE (w) |
2912 | && row < WINDOW_BOTTOM_EDGE_LINE (w)) | |
a13396c9 | 2913 | found = w; |
177c0ea7 | 2914 | |
a13396c9 GM |
2915 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
2916 | } | |
2917 | ||
2918 | return found; | |
2919 | } | |
2920 | ||
2921 | ||
5f5c8ee5 GM |
2922 | /* Perform a line dance in the window tree rooted at W, after |
2923 | scrolling a frame matrix in mirrored_line_dance. | |
2924 | ||
2925 | We are working on the range of lines UNCHANGED_AT_TOP + 1 to | |
2926 | UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix. | |
2927 | COPY_FROM is a vector containing, for each row I in the range 0 <= | |
2928 | I < NLINES, the index of the original line to move to I. This | |
2929 | index is relative to the row range, i.e. 0 <= index < NLINES. | |
2930 | RETAINED_P is a vector containing zero for each row 0 <= I < NLINES | |
2931 | which is empty. */ | |
2932 | ||
2933 | static void | |
971de7fb | 2934 | mirror_line_dance (struct window *w, int unchanged_at_top, int nlines, int *copy_from, char *retained_p) |
5f5c8ee5 GM |
2935 | { |
2936 | while (w) | |
2937 | { | |
2938 | if (!NILP (w->hchild)) | |
2939 | mirror_line_dance (XWINDOW (w->hchild), unchanged_at_top, | |
2940 | nlines, copy_from, retained_p); | |
2941 | else if (!NILP (w->vchild)) | |
2942 | mirror_line_dance (XWINDOW (w->vchild), unchanged_at_top, | |
2943 | nlines, copy_from, retained_p); | |
2944 | else | |
2945 | { | |
2946 | /* W is a leaf window, and we are working on its current | |
2947 | matrix m. */ | |
2948 | struct glyph_matrix *m = w->current_matrix; | |
a13396c9 | 2949 | int i, sync_p = 0; |
5f5c8ee5 GM |
2950 | struct glyph_row *old_rows; |
2951 | ||
2952 | /* Make a copy of the original rows of matrix m. */ | |
2953 | old_rows = (struct glyph_row *) alloca (m->nrows * sizeof *old_rows); | |
72af86bd | 2954 | memcpy (old_rows, m->rows, m->nrows * sizeof *old_rows); |
5f5c8ee5 GM |
2955 | |
2956 | for (i = 0; i < nlines; ++i) | |
2957 | { | |
2958 | /* Frame relative line assigned to. */ | |
2959 | int frame_to = i + unchanged_at_top; | |
177c0ea7 | 2960 | |
5f5c8ee5 GM |
2961 | /* Frame relative line assigned. */ |
2962 | int frame_from = copy_from[i] + unchanged_at_top; | |
177c0ea7 | 2963 | |
5f5c8ee5 GM |
2964 | /* Window relative line assigned to. */ |
2965 | int window_to = frame_to - m->matrix_y; | |
177c0ea7 | 2966 | |
5f5c8ee5 GM |
2967 | /* Window relative line assigned. */ |
2968 | int window_from = frame_from - m->matrix_y; | |
177c0ea7 | 2969 | |
5f5c8ee5 GM |
2970 | /* Is assigned line inside window? */ |
2971 | int from_inside_window_p | |
2972 | = window_from >= 0 && window_from < m->matrix_h; | |
177c0ea7 | 2973 | |
a13396c9 GM |
2974 | /* Is assigned to line inside window? */ |
2975 | int to_inside_window_p | |
2976 | = window_to >= 0 && window_to < m->matrix_h; | |
177c0ea7 | 2977 | |
a13396c9 | 2978 | if (from_inside_window_p && to_inside_window_p) |
5f5c8ee5 | 2979 | { |
5f5c8ee5 GM |
2980 | /* Enabled setting before assignment. */ |
2981 | int enabled_before_p; | |
177c0ea7 | 2982 | |
5f5c8ee5 GM |
2983 | /* Do the assignment. The enabled_p flag is saved |
2984 | over the assignment because the old redisplay did | |
2985 | that. */ | |
2986 | enabled_before_p = m->rows[window_to].enabled_p; | |
2987 | m->rows[window_to] = old_rows[window_from]; | |
2988 | m->rows[window_to].enabled_p = enabled_before_p; | |
177c0ea7 | 2989 | |
5f5c8ee5 GM |
2990 | /* If frame line is empty, window line is empty, too. */ |
2991 | if (!retained_p[copy_from[i]]) | |
2992 | m->rows[window_to].enabled_p = 0; | |
2993 | } | |
a13396c9 GM |
2994 | else if (to_inside_window_p) |
2995 | { | |
2996 | /* A copy between windows. This is an infrequent | |
2997 | case not worth optimizing. */ | |
2998 | struct frame *f = XFRAME (w->frame); | |
2999 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); | |
3000 | struct window *w2; | |
3001 | struct glyph_matrix *m2; | |
3002 | int m2_from; | |
3003 | ||
fe8b8401 | 3004 | w2 = frame_row_to_window (root, frame_from); |
6183d842 RS |
3005 | /* ttn@surf.glug.org: when enabling menu bar using `emacs |
3006 | -nw', FROM_FRAME sometimes has no associated window. | |
3007 | This check avoids a segfault if W2 is null. */ | |
3008 | if (w2) | |
3009 | { | |
3010 | m2 = w2->current_matrix; | |
3011 | m2_from = frame_from - m2->matrix_y; | |
3012 | copy_row_except_pointers (m->rows + window_to, | |
3013 | m2->rows + m2_from); | |
3014 | ||
3015 | /* If frame line is empty, window line is empty, too. */ | |
3016 | if (!retained_p[copy_from[i]]) | |
3017 | m->rows[window_to].enabled_p = 0; | |
3018 | } | |
a13396c9 GM |
3019 | sync_p = 1; |
3020 | } | |
3021 | else if (from_inside_window_p) | |
3022 | sync_p = 1; | |
5f5c8ee5 | 3023 | } |
a13396c9 GM |
3024 | |
3025 | /* If there was a copy between windows, make sure glyph | |
3026 | pointers are in sync with the frame matrix. */ | |
3027 | if (sync_p) | |
3028 | sync_window_with_frame_matrix_rows (w); | |
177c0ea7 | 3029 | |
5f5c8ee5 GM |
3030 | /* Check that no pointers are lost. */ |
3031 | CHECK_MATRIX (m); | |
3032 | } | |
3033 | ||
3034 | /* Next window on same level. */ | |
3035 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3036 | } | |
3037 | } | |
3038 | ||
3039 | ||
3040 | #if GLYPH_DEBUG | |
3041 | ||
3042 | /* Check that window and frame matrices agree about their | |
3043 | understanding where glyphs of the rows are to find. For each | |
3044 | window in the window tree rooted at W, check that rows in the | |
3045 | matrices of leaf window agree with their frame matrices about | |
3046 | glyph pointers. */ | |
3047 | ||
85fece3e | 3048 | static void |
59fc5cf9 | 3049 | check_window_matrix_pointers (struct window *w) |
5f5c8ee5 GM |
3050 | { |
3051 | while (w) | |
3052 | { | |
3053 | if (!NILP (w->hchild)) | |
3054 | check_window_matrix_pointers (XWINDOW (w->hchild)); | |
3055 | else if (!NILP (w->vchild)) | |
3056 | check_window_matrix_pointers (XWINDOW (w->vchild)); | |
3057 | else | |
60a8948a | 3058 | { |
5f5c8ee5 GM |
3059 | struct frame *f = XFRAME (w->frame); |
3060 | check_matrix_pointers (w->desired_matrix, f->desired_matrix); | |
3061 | check_matrix_pointers (w->current_matrix, f->current_matrix); | |
60a8948a | 3062 | } |
177c0ea7 | 3063 | |
5f5c8ee5 GM |
3064 | w = NILP (w->next) ? 0 : XWINDOW (w->next); |
3065 | } | |
3066 | } | |
3067 | ||
3068 | ||
3069 | /* Check that window rows are slices of frame rows. WINDOW_MATRIX is | |
3070 | a window and FRAME_MATRIX is the corresponding frame matrix. For | |
3071 | each row in WINDOW_MATRIX check that it's a slice of the | |
3072 | corresponding frame row. If it isn't, abort. */ | |
3073 | ||
3074 | static void | |
59fc5cf9 AS |
3075 | check_matrix_pointers (struct glyph_matrix *window_matrix, |
3076 | struct glyph_matrix *frame_matrix) | |
5f5c8ee5 GM |
3077 | { |
3078 | /* Row number in WINDOW_MATRIX. */ | |
3079 | int i = 0; | |
3080 | ||
3081 | /* Row number corresponding to I in FRAME_MATRIX. */ | |
3082 | int j = window_matrix->matrix_y; | |
3083 | ||
177c0ea7 | 3084 | /* For all rows check that the row in the window matrix is a |
5f5c8ee5 GM |
3085 | slice of the row in the frame matrix. If it isn't we didn't |
3086 | mirror an operation on the frame matrix correctly. */ | |
3087 | while (i < window_matrix->nrows) | |
3088 | { | |
3089 | if (!glyph_row_slice_p (window_matrix->rows + i, | |
3090 | frame_matrix->rows + j)) | |
3091 | abort (); | |
3092 | ++i, ++j; | |
3093 | } | |
3094 | } | |
3095 | ||
3096 | #endif /* GLYPH_DEBUG != 0 */ | |
3097 | ||
3098 | ||
3099 | \f | |
3100 | /********************************************************************** | |
3101 | VPOS and HPOS translations | |
3102 | **********************************************************************/ | |
3103 | ||
3104 | #if GLYPH_DEBUG | |
3105 | ||
3106 | /* Translate vertical position VPOS which is relative to window W to a | |
3107 | vertical position relative to W's frame. */ | |
3108 | ||
3109 | static int | |
59fc5cf9 | 3110 | window_to_frame_vpos (struct window *w, int vpos) |
5f5c8ee5 | 3111 | { |
85fece3e | 3112 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
5f5c8ee5 | 3113 | xassert (vpos >= 0 && vpos <= w->desired_matrix->nrows); |
7df02016 | 3114 | vpos += WINDOW_TOP_EDGE_LINE (w); |
85fece3e | 3115 | xassert (vpos >= 0 && vpos <= FRAME_LINES (XFRAME (w->frame))); |
5f5c8ee5 GM |
3116 | return vpos; |
3117 | } | |
3118 | ||
3119 | ||
3120 | /* Translate horizontal position HPOS which is relative to window W to | |
153a073c | 3121 | a horizontal position relative to W's frame. */ |
5f5c8ee5 GM |
3122 | |
3123 | static int | |
59fc5cf9 | 3124 | window_to_frame_hpos (struct window *w, int hpos) |
5f5c8ee5 | 3125 | { |
82f4a138 | 3126 | xassert (!FRAME_WINDOW_P (XFRAME (w->frame))); |
7df02016 | 3127 | hpos += WINDOW_LEFT_EDGE_COL (w); |
5f5c8ee5 GM |
3128 | return hpos; |
3129 | } | |
177c0ea7 | 3130 | |
5f5c8ee5 GM |
3131 | #endif /* GLYPH_DEBUG */ |
3132 | ||
3133 | ||
3134 | \f | |
3135 | /********************************************************************** | |
3136 | Redrawing Frames | |
3137 | **********************************************************************/ | |
3138 | ||
a7ca3326 | 3139 | DEFUN ("redraw-frame", Fredraw_frame, Sredraw_frame, 1, 1, 0, |
7ee72033 | 3140 | doc: /* Clear frame FRAME and output again what is supposed to appear on it. */) |
5842a27b | 3141 | (Lisp_Object frame) |
5f5c8ee5 GM |
3142 | { |
3143 | struct frame *f; | |
3144 | ||
b7826503 | 3145 | CHECK_LIVE_FRAME (frame); |
5f5c8ee5 GM |
3146 | f = XFRAME (frame); |
3147 | ||
3148 | /* Ignore redraw requests, if frame has no glyphs yet. | |
3149 | (Implementation note: It still has to be checked why we are | |
3150 | called so early here). */ | |
3151 | if (!glyphs_initialized_initially_p) | |
3152 | return Qnil; | |
3153 | ||
3154 | update_begin (f); | |
3224dac1 | 3155 | #ifdef MSDOS |
f2adda5e | 3156 | if (FRAME_MSDOS_P (f)) |
79d39b69 | 3157 | FRAME_TERMINAL (f)->set_terminal_modes_hook (FRAME_TERMINAL (f)); |
3224dac1 | 3158 | #endif |
385ed61f | 3159 | clear_frame (f); |
5f5c8ee5 GM |
3160 | clear_current_matrices (f); |
3161 | update_end (f); | |
daf01701 | 3162 | if (FRAME_TERMCAP_P (f)) |
0b0d3e0b | 3163 | fflush (FRAME_TTY (f)->output); |
5f5c8ee5 GM |
3164 | windows_or_buffers_changed++; |
3165 | /* Mark all windows as inaccurate, so that every window will have | |
3166 | its redisplay done. */ | |
3167 | mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0); | |
3168 | set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f)), 1); | |
3169 | f->garbaged = 0; | |
3170 | return Qnil; | |
3171 | } | |
3172 | ||
3173 | ||
3174 | /* Redraw frame F. This is nothing more than a call to the Lisp | |
3175 | function redraw-frame. */ | |
3176 | ||
3177 | void | |
971de7fb | 3178 | redraw_frame (struct frame *f) |
5f5c8ee5 GM |
3179 | { |
3180 | Lisp_Object frame; | |
3181 | XSETFRAME (frame, f); | |
3182 | Fredraw_frame (frame); | |
3183 | } | |
3184 | ||
3185 | ||
3186 | DEFUN ("redraw-display", Fredraw_display, Sredraw_display, 0, 0, "", | |
7ee72033 | 3187 | doc: /* Clear and redisplay all visible frames. */) |
5842a27b | 3188 | (void) |
5f5c8ee5 GM |
3189 | { |
3190 | Lisp_Object tail, frame; | |
3191 | ||
3192 | FOR_EACH_FRAME (tail, frame) | |
3193 | if (FRAME_VISIBLE_P (XFRAME (frame))) | |
3194 | Fredraw_frame (frame); | |
3195 | ||
3196 | return Qnil; | |
3197 | } | |
3198 | ||
3199 | ||
5f5c8ee5 | 3200 | \f |
5f5c8ee5 GM |
3201 | /*********************************************************************** |
3202 | Frame Update | |
3203 | ***********************************************************************/ | |
4588ec20 | 3204 | |
5f5c8ee5 | 3205 | /* Update frame F based on the data in desired matrices. |
4588ec20 | 3206 | |
5f5c8ee5 GM |
3207 | If FORCE_P is non-zero, don't let redisplay be stopped by detecting |
3208 | pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try | |
3209 | scrolling. | |
177c0ea7 | 3210 | |
5f5c8ee5 | 3211 | Value is non-zero if redisplay was stopped due to pending input. */ |
4588ec20 | 3212 | |
5f5c8ee5 | 3213 | int |
971de7fb | 3214 | update_frame (struct frame *f, int force_p, int inhibit_hairy_id_p) |
5f5c8ee5 GM |
3215 | { |
3216 | /* 1 means display has been paused because of pending input. */ | |
3217 | int paused_p; | |
3218 | struct window *root_window = XWINDOW (f->root_window); | |
3219 | ||
a2130dbb KS |
3220 | if (redisplay_dont_pause) |
3221 | force_p = 1; | |
d012c62b | 3222 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3223 | else if (NILP (Vredisplay_preemption_period)) |
3224 | force_p = 1; | |
3225 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3226 | { |
3227 | EMACS_TIME tm; | |
3228 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3229 | int sec, usec; | |
3230 | ||
993d4ab6 KS |
3231 | if (detect_input_pending_ignore_squeezables ()) |
3232 | { | |
3233 | paused_p = 1; | |
3234 | goto do_pause; | |
3235 | } | |
3236 | ||
d012c62b KS |
3237 | sec = (int) p; |
3238 | usec = (p - sec) * 1000000; | |
3239 | ||
3240 | EMACS_GET_TIME (tm); | |
3241 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3242 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3243 | } | |
3244 | #endif | |
3245 | ||
5f5c8ee5 | 3246 | if (FRAME_WINDOW_P (f)) |
4588ec20 | 3247 | { |
5f5c8ee5 GM |
3248 | /* We are working on window matrix basis. All windows whose |
3249 | flag must_be_updated_p is set have to be updated. */ | |
3250 | ||
3251 | /* Record that we are not working on frame matrices. */ | |
3252 | set_frame_matrix_frame (NULL); | |
3253 | ||
3254 | /* Update all windows in the window tree of F, maybe stopping | |
3255 | when pending input is detected. */ | |
3256 | update_begin (f); | |
3257 | ||
3258 | /* Update the menu bar on X frames that don't have toolkit | |
3259 | support. */ | |
3260 | if (WINDOWP (f->menu_bar_window)) | |
3261 | update_window (XWINDOW (f->menu_bar_window), 1); | |
3262 | ||
3263 | /* Update the tool-bar window, if present. */ | |
9ea173e8 | 3264 | if (WINDOWP (f->tool_bar_window)) |
4588ec20 | 3265 | { |
9ea173e8 | 3266 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
3267 | |
3268 | /* Update tool-bar window. */ | |
3269 | if (w->must_be_updated_p) | |
4588ec20 | 3270 | { |
153a073c PJ |
3271 | Lisp_Object tem; |
3272 | ||
5f5c8ee5 GM |
3273 | update_window (w, 1); |
3274 | w->must_be_updated_p = 0; | |
3275 | ||
3276 | /* Swap tool-bar strings. We swap because we want to | |
3277 | reuse strings. */ | |
9ea173e8 GM |
3278 | tem = f->current_tool_bar_string; |
3279 | f->current_tool_bar_string = f->desired_tool_bar_string; | |
3280 | f->desired_tool_bar_string = tem; | |
4588ec20 JB |
3281 | } |
3282 | } | |
177c0ea7 | 3283 | |
5f5c8ee5 GM |
3284 | |
3285 | /* Update windows. */ | |
3286 | paused_p = update_window_tree (root_window, force_p); | |
3287 | update_end (f); | |
177c0ea7 | 3288 | |
6b61353c | 3289 | /* This flush is a performance bottleneck under X, |
e581a466 | 3290 | and it doesn't seem to be necessary anyway (in general). |
6b61353c | 3291 | It is necessary when resizing the window with the mouse, or |
e581a466 | 3292 | at least the fringes are not redrawn in a timely manner. ++kfs */ |
6b61353c | 3293 | if (f->force_flush_display_p) |
e581a466 KL |
3294 | { |
3295 | FRAME_RIF (f)->flush_display (f); | |
3296 | f->force_flush_display_p = 0; | |
3297 | } | |
4588ec20 | 3298 | } |
5f5c8ee5 GM |
3299 | else |
3300 | { | |
3301 | /* We are working on frame matrix basis. Set the frame on whose | |
3302 | frame matrix we operate. */ | |
3303 | set_frame_matrix_frame (f); | |
3304 | ||
868dd24b | 3305 | /* Build F's desired matrix from window matrices. */ |
5f5c8ee5 | 3306 | build_frame_matrix (f); |
177c0ea7 | 3307 | |
868dd24b GM |
3308 | /* Update the display */ |
3309 | update_begin (f); | |
5f5c8ee5 | 3310 | paused_p = update_frame_1 (f, force_p, inhibit_hairy_id_p); |
868dd24b GM |
3311 | update_end (f); |
3312 | ||
7d2f1216 | 3313 | if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f)) |
3224dac1 | 3314 | { |
0b0d3e0b KL |
3315 | if (FRAME_TTY (f)->termscript) |
3316 | fflush (FRAME_TTY (f)->termscript); | |
7d2f1216 EZ |
3317 | if (FRAME_TERMCAP_P (f)) |
3318 | fflush (FRAME_TTY (f)->output); | |
3224dac1 | 3319 | } |
868dd24b | 3320 | |
5f5c8ee5 | 3321 | /* Check window matrices for lost pointers. */ |
2d5912c1 | 3322 | #if GLYPH_DEBUG |
9b0e97aa GM |
3323 | check_window_matrix_pointers (root_window); |
3324 | add_frame_display_history (f, paused_p); | |
3325 | #endif | |
5f5c8ee5 GM |
3326 | } |
3327 | ||
ef1b0ba7 | 3328 | #if PERIODIC_PREEMPTION_CHECKING |
993d4ab6 | 3329 | do_pause: |
ef1b0ba7 | 3330 | #endif |
5f5c8ee5 GM |
3331 | /* Reset flags indicating that a window should be updated. */ |
3332 | set_window_update_flags (root_window, 0); | |
177c0ea7 | 3333 | |
868dd24b | 3334 | display_completed = !paused_p; |
5f5c8ee5 | 3335 | return paused_p; |
4588ec20 | 3336 | } |
5f5c8ee5 GM |
3337 | |
3338 | ||
4588ec20 | 3339 | \f |
5f5c8ee5 GM |
3340 | /************************************************************************ |
3341 | Window-based updates | |
3342 | ************************************************************************/ | |
3343 | ||
3344 | /* Perform updates in window tree rooted at W. FORCE_P non-zero means | |
3345 | don't stop updating when input is pending. */ | |
3346 | ||
3347 | static int | |
971de7fb | 3348 | update_window_tree (struct window *w, int force_p) |
5f5c8ee5 GM |
3349 | { |
3350 | int paused_p = 0; | |
177c0ea7 | 3351 | |
5f5c8ee5 GM |
3352 | while (w && !paused_p) |
3353 | { | |
3354 | if (!NILP (w->hchild)) | |
3355 | paused_p |= update_window_tree (XWINDOW (w->hchild), force_p); | |
3356 | else if (!NILP (w->vchild)) | |
3357 | paused_p |= update_window_tree (XWINDOW (w->vchild), force_p); | |
3358 | else if (w->must_be_updated_p) | |
3359 | paused_p |= update_window (w, force_p); | |
3360 | ||
3361 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
3362 | } | |
3363 | ||
3364 | return paused_p; | |
3365 | } | |
3366 | ||
3367 | ||
3368 | /* Update window W if its flag must_be_updated_p is non-zero. If | |
3369 | FORCE_P is non-zero, don't stop updating if input is pending. */ | |
3370 | ||
3371 | void | |
971de7fb | 3372 | update_single_window (struct window *w, int force_p) |
5f5c8ee5 GM |
3373 | { |
3374 | if (w->must_be_updated_p) | |
3375 | { | |
3376 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
3377 | ||
3378 | /* Record that this is not a frame-based redisplay. */ | |
3379 | set_frame_matrix_frame (NULL); | |
3380 | ||
a2130dbb KS |
3381 | if (redisplay_dont_pause) |
3382 | force_p = 1; | |
d012c62b | 3383 | #if PERIODIC_PREEMPTION_CHECKING |
a2130dbb KS |
3384 | else if (NILP (Vredisplay_preemption_period)) |
3385 | force_p = 1; | |
3386 | else if (!force_p && NUMBERP (Vredisplay_preemption_period)) | |
d012c62b KS |
3387 | { |
3388 | EMACS_TIME tm; | |
3389 | double p = XFLOATINT (Vredisplay_preemption_period); | |
3390 | int sec, usec; | |
3391 | ||
3392 | sec = (int) p; | |
3393 | usec = (p - sec) * 1000000; | |
3394 | ||
3395 | EMACS_GET_TIME (tm); | |
3396 | EMACS_SET_SECS_USECS (preemption_period, sec, usec); | |
3397 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
3398 | } | |
3399 | #endif | |
3400 | ||
5f5c8ee5 GM |
3401 | /* Update W. */ |
3402 | update_begin (f); | |
3403 | update_window (w, force_p); | |
3404 | update_end (f); | |
4588ec20 | 3405 | |
5f5c8ee5 GM |
3406 | /* Reset flag in W. */ |
3407 | w->must_be_updated_p = 0; | |
3408 | } | |
3409 | } | |
4588ec20 | 3410 | |
93e023fc | 3411 | #ifdef HAVE_WINDOW_SYSTEM |
4588ec20 | 3412 | |
408f5064 GM |
3413 | /* Redraw lines from the current matrix of window W that are |
3414 | overlapped by other rows. YB is bottom-most y-position in W. */ | |
3415 | ||
3416 | static void | |
971de7fb | 3417 | redraw_overlapped_rows (struct window *w, int yb) |
408f5064 | 3418 | { |
d8ee7803 | 3419 | int i; |
fa971ac3 | 3420 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
3fc809e2 | 3421 | |
408f5064 GM |
3422 | /* If rows overlapping others have been changed, the rows being |
3423 | overlapped have to be redrawn. This won't draw lines that have | |
3424 | already been drawn in update_window_line because overlapped_p in | |
3425 | desired rows is 0, so after row assignment overlapped_p in | |
3426 | current rows is 0. */ | |
3427 | for (i = 0; i < w->current_matrix->nrows; ++i) | |
3428 | { | |
e876ff42 | 3429 | struct glyph_row *row = w->current_matrix->rows + i; |
408f5064 GM |
3430 | |
3431 | if (!row->enabled_p) | |
3432 | break; | |
3433 | else if (row->mode_line_p) | |
3434 | continue; | |
177c0ea7 | 3435 | |
408f5064 GM |
3436 | if (row->overlapped_p) |
3437 | { | |
3438 | enum glyph_row_area area; | |
177c0ea7 | 3439 | |
408f5064 GM |
3440 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
3441 | { | |
3442 | updated_row = row; | |
3443 | updated_area = area; | |
fa971ac3 KL |
3444 | FRAME_RIF (f)->cursor_to (i, 0, row->y, |
3445 | area == TEXT_AREA ? row->x : 0); | |
408f5064 | 3446 | if (row->used[area]) |
fa971ac3 KL |
3447 | FRAME_RIF (f)->write_glyphs (row->glyphs[area], |
3448 | row->used[area]); | |
3449 | FRAME_RIF (f)->clear_end_of_line (-1); | |
408f5064 | 3450 | } |
177c0ea7 | 3451 | |
408f5064 GM |
3452 | row->overlapped_p = 0; |
3453 | } | |
3454 | ||
e876ff42 | 3455 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) |
408f5064 GM |
3456 | break; |
3457 | } | |
3458 | } | |
3459 | ||
3460 | ||
3461 | /* Redraw lines from the current matrix of window W that overlap | |
3462 | others. YB is bottom-most y-position in W. */ | |
3463 | ||
3464 | static void | |
971de7fb | 3465 | redraw_overlapping_rows (struct window *w, int yb) |
408f5064 GM |
3466 | { |
3467 | int i, bottom_y; | |
3468 | struct glyph_row *row; | |
fa971ac3 | 3469 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
3fc809e2 | 3470 | |
408f5064 GM |
3471 | for (i = 0; i < w->current_matrix->nrows; ++i) |
3472 | { | |
3473 | row = w->current_matrix->rows + i; | |
3474 | ||
3475 | if (!row->enabled_p) | |
3476 | break; | |
3477 | else if (row->mode_line_p) | |
3478 | continue; | |
177c0ea7 | 3479 | |
408f5064 GM |
3480 | bottom_y = MATRIX_ROW_BOTTOM_Y (row); |
3481 | ||
b4b2c2ca | 3482 | if (row->overlapping_p) |
408f5064 | 3483 | { |
41124e06 YM |
3484 | int overlaps = 0; |
3485 | ||
b4b2c2ca | 3486 | if (MATRIX_ROW_OVERLAPS_PRED_P (row) && i > 0 |
41124e06 YM |
3487 | && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p) |
3488 | overlaps |= OVERLAPS_PRED; | |
b4b2c2ca | 3489 | if (MATRIX_ROW_OVERLAPS_SUCC_P (row) && bottom_y < yb |
41124e06 YM |
3490 | && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p) |
3491 | overlaps |= OVERLAPS_SUCC; | |
3492 | ||
3493 | if (overlaps) | |
3494 | { | |
3495 | if (row->used[LEFT_MARGIN_AREA]) | |
3496 | rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps); | |
3497 | ||
3498 | if (row->used[TEXT_AREA]) | |
3499 | rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps); | |
3500 | ||
3501 | if (row->used[RIGHT_MARGIN_AREA]) | |
3502 | rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps); | |
3503 | ||
c5e87d10 | 3504 | /* Record in neighbor rows that ROW overwrites part of |
41124e06 YM |
3505 | their display. */ |
3506 | if (overlaps & OVERLAPS_PRED) | |
3507 | MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1; | |
3508 | if (overlaps & OVERLAPS_SUCC) | |
3509 | MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1; | |
3510 | } | |
408f5064 GM |
3511 | } |
3512 | ||
3513 | if (bottom_y >= yb) | |
3514 | break; | |
3515 | } | |
3516 | } | |
3517 | ||
93e023fc KS |
3518 | #endif /* HAVE_WINDOW_SYSTEM */ |
3519 | ||
408f5064 | 3520 | |
09ad5a91 | 3521 | #if defined GLYPH_DEBUG && 0 |
93962bfa GM |
3522 | |
3523 | /* Check that no row in the current matrix of window W is enabled | |
3524 | which is below what's displayed in the window. */ | |
3525 | ||
09ad5a91 | 3526 | static void |
971de7fb | 3527 | check_current_matrix_flags (struct window *w) |
93962bfa GM |
3528 | { |
3529 | int last_seen_p = 0; | |
3530 | int i, yb = window_text_bottom_y (w); | |
3531 | ||
3532 | for (i = 0; i < w->current_matrix->nrows - 1; ++i) | |
3533 | { | |
3534 | struct glyph_row *row = MATRIX_ROW (w->current_matrix, i); | |
3535 | if (!last_seen_p && MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3536 | last_seen_p = 1; | |
3537 | else if (last_seen_p && row->enabled_p) | |
3538 | abort (); | |
3539 | } | |
3540 | } | |
3541 | ||
3542 | #endif /* GLYPH_DEBUG */ | |
3543 | ||
3544 | ||
5f5c8ee5 GM |
3545 | /* Update display of window W. FORCE_P non-zero means that we should |
3546 | not stop when detecting pending input. */ | |
3547 | ||
3548 | static int | |
971de7fb | 3549 | update_window (struct window *w, int force_p) |
4588ec20 | 3550 | { |
5f5c8ee5 GM |
3551 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
3552 | int paused_p; | |
d012c62b | 3553 | #if !PERIODIC_PREEMPTION_CHECKING |
5f5c8ee5 | 3554 | int preempt_count = baud_rate / 2400 + 1; |
d012c62b | 3555 | #endif |
597cfb3f | 3556 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
b96fd3e8 | 3557 | #if GLYPH_DEBUG |
5f5c8ee5 | 3558 | /* Check that W's frame doesn't have glyph matrices. */ |
82f4a138 | 3559 | xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w)))); |
4a34b529 | 3560 | #endif |
5f5c8ee5 GM |
3561 | |
3562 | /* Check pending input the first time so that we can quickly return. */ | |
a2130dbb KS |
3563 | #if !PERIODIC_PREEMPTION_CHECKING |
3564 | if (!force_p) | |
a2d5fca0 | 3565 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3566 | #endif |
4588ec20 | 3567 | |
5f5c8ee5 GM |
3568 | /* If forced to complete the update, or if no input is pending, do |
3569 | the update. */ | |
8fd9a666 | 3570 | if (force_p || !input_pending || !NILP (do_mouse_tracking)) |
4588ec20 | 3571 | { |
5f5c8ee5 GM |
3572 | struct glyph_row *row, *end; |
3573 | struct glyph_row *mode_line_row; | |
56974e03 | 3574 | struct glyph_row *header_line_row; |
0bc32927 PE |
3575 | int yb, changed_p = 0, mouse_face_overwritten_p = 0; |
3576 | #if ! PERIODIC_PREEMPTION_CHECKING | |
3577 | int n_updated = 0; | |
3578 | #endif | |
5f5c8ee5 GM |
3579 | |
3580 | rif->update_window_begin_hook (w); | |
3581 | yb = window_text_bottom_y (w); | |
5f5c8ee5 GM |
3582 | row = desired_matrix->rows; |
3583 | end = row + desired_matrix->nrows - 1; | |
177c0ea7 | 3584 | |
394305db EZ |
3585 | /* Take note of the header line, if there is one. We will |
3586 | update it below, after updating all of the window's lines. */ | |
5f5c8ee5 | 3587 | if (row->mode_line_p) |
56974e03 GM |
3588 | { |
3589 | header_line_row = row; | |
3590 | ++row; | |
3591 | } | |
3592 | else | |
3593 | header_line_row = NULL; | |
5f5c8ee5 GM |
3594 | |
3595 | /* Update the mode line, if necessary. */ | |
3596 | mode_line_row = MATRIX_MODE_LINE_ROW (desired_matrix); | |
3597 | if (mode_line_row->mode_line_p && mode_line_row->enabled_p) | |
3598 | { | |
3599 | mode_line_row->y = yb; | |
3600 | update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, | |
e876ff42 GM |
3601 | desired_matrix), |
3602 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3603 | } |
3604 | ||
3605 | /* Find first enabled row. Optimizations in redisplay_internal | |
3606 | may lead to an update with only one row enabled. There may | |
3607 | be also completely empty matrices. */ | |
3608 | while (row < end && !row->enabled_p) | |
3609 | ++row; | |
177c0ea7 | 3610 | |
bfdcafe1 | 3611 | /* Try reusing part of the display by copying. */ |
5f5c8ee5 | 3612 | if (row < end && !desired_matrix->no_scrolling_p) |
56974e03 GM |
3613 | { |
3614 | int rc = scrolling_window (w, header_line_row != NULL); | |
3615 | if (rc < 0) | |
3616 | { | |
3617 | /* All rows were found to be equal. */ | |
3618 | paused_p = 0; | |
3619 | goto set_cursor; | |
3620 | } | |
3621 | else if (rc > 0) | |
6b61353c KH |
3622 | { |
3623 | /* We've scrolled the display. */ | |
3624 | force_p = 1; | |
3625 | changed_p = 1; | |
3626 | } | |
5f5c8ee5 GM |
3627 | } |
3628 | ||
3629 | /* Update the rest of the lines. */ | |
0bc32927 | 3630 | for (; row < end && (force_p || !input_pending); ++row) |
394305db EZ |
3631 | /* scrolling_window resets the enabled_p flag of the rows it |
3632 | reuses from current_matrix. */ | |
b7412313 | 3633 | if (row->enabled_p) |
5f5c8ee5 GM |
3634 | { |
3635 | int vpos = MATRIX_ROW_VPOS (row, desired_matrix); | |
3636 | int i; | |
177c0ea7 | 3637 | |
153a073c | 3638 | /* We'll have to play a little bit with when to |
5f5c8ee5 GM |
3639 | detect_input_pending. If it's done too often, |
3640 | scrolling large windows with repeated scroll-up | |
3641 | commands will too quickly pause redisplay. */ | |
d012c62b KS |
3642 | #if PERIODIC_PREEMPTION_CHECKING |
3643 | if (!force_p) | |
3644 | { | |
3645 | EMACS_TIME tm, dif; | |
3646 | EMACS_GET_TIME (tm); | |
3647 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
3648 | if (EMACS_TIME_NEG_P (dif)) | |
3649 | { | |
3650 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
3651 | if (detect_input_pending_ignore_squeezables ()) |
3652 | break; | |
d012c62b KS |
3653 | } |
3654 | } | |
3655 | #else | |
e87b8809 | 3656 | if (!force_p && ++n_updated % preempt_count == 0) |
a2d5fca0 | 3657 | detect_input_pending_ignore_squeezables (); |
d012c62b | 3658 | #endif |
e876ff42 GM |
3659 | changed_p |= update_window_line (w, vpos, |
3660 | &mouse_face_overwritten_p); | |
5f5c8ee5 GM |
3661 | |
3662 | /* Mark all rows below the last visible one in the current | |
3663 | matrix as invalid. This is necessary because of | |
3664 | variable line heights. Consider the case of three | |
3665 | successive redisplays, where the first displays 5 | |
3666 | lines, the second 3 lines, and the third 5 lines again. | |
3667 | If the second redisplay wouldn't mark rows in the | |
3668 | current matrix invalid, the third redisplay might be | |
3669 | tempted to optimize redisplay based on lines displayed | |
3670 | in the first redisplay. */ | |
3671 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
3672 | for (i = vpos + 1; i < w->current_matrix->nrows - 1; ++i) | |
3673 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
3674 | } | |
3675 | ||
3676 | /* Was display preempted? */ | |
3677 | paused_p = row < end; | |
177c0ea7 | 3678 | |
56974e03 | 3679 | set_cursor: |
177c0ea7 | 3680 | |
6b61353c KH |
3681 | /* Update the header line after scrolling because a new header |
3682 | line would otherwise overwrite lines at the top of the window | |
3683 | that can be scrolled. */ | |
3684 | if (header_line_row && header_line_row->enabled_p) | |
3685 | { | |
3686 | header_line_row->y = 0; | |
3687 | update_window_line (w, 0, &mouse_face_overwritten_p); | |
6b61353c KH |
3688 | } |
3689 | ||
153a073c | 3690 | /* Fix the appearance of overlapping/overlapped rows. */ |
5f5c8ee5 GM |
3691 | if (!paused_p && !w->pseudo_window_p) |
3692 | { | |
93e023fc | 3693 | #ifdef HAVE_WINDOW_SYSTEM |
e876ff42 GM |
3694 | if (changed_p && rif->fix_overlapping_area) |
3695 | { | |
3696 | redraw_overlapped_rows (w, yb); | |
3697 | redraw_overlapping_rows (w, yb); | |
3698 | } | |
93e023fc | 3699 | #endif |
177c0ea7 | 3700 | |
5f5c8ee5 GM |
3701 | /* Make cursor visible at cursor position of W. */ |
3702 | set_window_cursor_after_update (w); | |
3703 | ||
e876ff42 GM |
3704 | #if 0 /* Check that current matrix invariants are satisfied. This is |
3705 | for debugging only. See the comment of check_matrix_invariants. */ | |
5f5c8ee5 GM |
3706 | IF_DEBUG (check_matrix_invariants (w)); |
3707 | #endif | |
4588ec20 | 3708 | } |
5f5c8ee5 GM |
3709 | |
3710 | #if GLYPH_DEBUG | |
3711 | /* Remember the redisplay method used to display the matrix. */ | |
3712 | strcpy (w->current_matrix->method, w->desired_matrix->method); | |
3713 | #endif | |
408f5064 | 3714 | |
6b61353c KH |
3715 | #ifdef HAVE_WINDOW_SYSTEM |
3716 | update_window_fringes (w, 0); | |
3717 | #endif | |
3718 | ||
56974e03 GM |
3719 | /* End the update of window W. Don't set the cursor if we |
3720 | paused updating the display because in this case, | |
3721 | set_window_cursor_after_update hasn't been called, and | |
3722 | output_cursor doesn't contain the cursor location. */ | |
3723 | rif->update_window_end_hook (w, !paused_p, mouse_face_overwritten_p); | |
4588ec20 | 3724 | } |
5f5c8ee5 GM |
3725 | else |
3726 | paused_p = 1; | |
3727 | ||
2d5912c1 | 3728 | #if GLYPH_DEBUG |
0cffd9d8 | 3729 | /* check_current_matrix_flags (w); */ |
9b0e97aa GM |
3730 | add_window_display_history (w, w->current_matrix->method, paused_p); |
3731 | #endif | |
177c0ea7 | 3732 | |
5f5c8ee5 | 3733 | clear_glyph_matrix (desired_matrix); |
408f5064 | 3734 | |
5f5c8ee5 | 3735 | return paused_p; |
4588ec20 JB |
3736 | } |
3737 | ||
b64b3980 | 3738 | |
5f5c8ee5 GM |
3739 | /* Update the display of area AREA in window W, row number VPOS. |
3740 | AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */ | |
3741 | ||
3742 | static void | |
971de7fb | 3743 | update_marginal_area (struct window *w, int area, int vpos) |
b64b3980 | 3744 | { |
5f5c8ee5 | 3745 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); |
fa971ac3 | 3746 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
3747 | |
3748 | /* Let functions in xterm.c know what area subsequent X positions | |
3749 | will be relative to. */ | |
3750 | updated_area = area; | |
3751 | ||
3752 | /* Set cursor to start of glyphs, write them, and clear to the end | |
3753 | of the area. I don't think that something more sophisticated is | |
3754 | necessary here, since marginal areas will not be the default. */ | |
3755 | rif->cursor_to (vpos, 0, desired_row->y, 0); | |
3756 | if (desired_row->used[area]) | |
3757 | rif->write_glyphs (desired_row->glyphs[area], desired_row->used[area]); | |
3758 | rif->clear_end_of_line (-1); | |
b64b3980 | 3759 | } |
23b0200c | 3760 | |
352f1545 | 3761 | |
408f5064 GM |
3762 | /* Update the display of the text area of row VPOS in window W. |
3763 | Value is non-zero if display has changed. */ | |
5f5c8ee5 | 3764 | |
408f5064 | 3765 | static int |
971de7fb | 3766 | update_text_area (struct window *w, int vpos) |
23b0200c | 3767 | { |
5f5c8ee5 GM |
3768 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); |
3769 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 3770 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 3771 | int changed_p = 0; |
5f5c8ee5 GM |
3772 | |
3773 | /* Let functions in xterm.c know what area subsequent X positions | |
3774 | will be relative to. */ | |
3775 | updated_area = TEXT_AREA; | |
177c0ea7 | 3776 | |
5f5c8ee5 GM |
3777 | /* If rows are at different X or Y, or rows have different height, |
3778 | or the current row is marked invalid, write the entire line. */ | |
3779 | if (!current_row->enabled_p | |
3780 | || desired_row->y != current_row->y | |
3781 | || desired_row->ascent != current_row->ascent | |
408f5064 GM |
3782 | || desired_row->phys_ascent != current_row->phys_ascent |
3783 | || desired_row->phys_height != current_row->phys_height | |
5f5c8ee5 | 3784 | || desired_row->visible_height != current_row->visible_height |
408f5064 | 3785 | || current_row->overlapped_p |
fee8b690 CY |
3786 | /* This next line is necessary for correctly redrawing |
3787 | mouse-face areas after scrolling and other operations. | |
3788 | However, it causes excessive flickering when mouse is moved | |
3789 | across the mode line. Luckily, turning it off for the mode | |
a75b65c4 KS |
3790 | line doesn't seem to hurt anything. -- cyd. |
3791 | But it is still needed for the header line. -- kfs. */ | |
3792 | || (current_row->mouse_face_p | |
3793 | && !(current_row->mode_line_p && vpos > 0)) | |
5f5c8ee5 GM |
3794 | || current_row->x != desired_row->x) |
3795 | { | |
3796 | rif->cursor_to (vpos, 0, desired_row->y, desired_row->x); | |
177c0ea7 | 3797 | |
5f5c8ee5 GM |
3798 | if (desired_row->used[TEXT_AREA]) |
3799 | rif->write_glyphs (desired_row->glyphs[TEXT_AREA], | |
3800 | desired_row->used[TEXT_AREA]); | |
177c0ea7 | 3801 | |
5f5c8ee5 GM |
3802 | /* Clear to end of window. */ |
3803 | rif->clear_end_of_line (-1); | |
408f5064 | 3804 | changed_p = 1; |
60f2f3f1 GM |
3805 | |
3806 | /* This erases the cursor. We do this here because | |
3807 | notice_overwritten_cursor cannot easily check this, which | |
3808 | might indicate that the whole functionality of | |
3809 | notice_overwritten_cursor would better be implemented here. | |
3810 | On the other hand, we need notice_overwritten_cursor as long | |
3811 | as mouse highlighting is done asynchronously outside of | |
3812 | redisplay. */ | |
3813 | if (vpos == w->phys_cursor.vpos) | |
3814 | w->phys_cursor_on_p = 0; | |
5f5c8ee5 GM |
3815 | } |
3816 | else | |
3817 | { | |
3818 | int stop, i, x; | |
3819 | struct glyph *current_glyph = current_row->glyphs[TEXT_AREA]; | |
3820 | struct glyph *desired_glyph = desired_row->glyphs[TEXT_AREA]; | |
e47306e6 | 3821 | int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; |
074b781a | 3822 | int desired_stop_pos = desired_row->used[TEXT_AREA]; |
91d227d9 | 3823 | int abort_skipping = 0; |
5f5c8ee5 | 3824 | |
78897758 YM |
3825 | /* If the desired row extends its face to the text area end, and |
3826 | unless the current row also does so at the same position, | |
5f5c8ee5 GM |
3827 | make sure we write at least one glyph, so that the face |
3828 | extension actually takes place. */ | |
78897758 YM |
3829 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) |
3830 | && (desired_stop_pos < current_row->used[TEXT_AREA] | |
3831 | || (desired_stop_pos == current_row->used[TEXT_AREA] | |
3832 | && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) | |
074b781a | 3833 | --desired_stop_pos; |
177c0ea7 | 3834 | |
5f5c8ee5 GM |
3835 | stop = min (current_row->used[TEXT_AREA], desired_stop_pos); |
3836 | i = 0; | |
3837 | x = desired_row->x; | |
8399f8a0 GM |
3838 | |
3839 | /* Loop over glyphs that current and desired row may have | |
3840 | in common. */ | |
5f5c8ee5 | 3841 | while (i < stop) |
352f1545 | 3842 | { |
91d227d9 | 3843 | int can_skip_p = !abort_skipping; |
177c0ea7 | 3844 | |
5f5c8ee5 | 3845 | /* Skip over glyphs that both rows have in common. These |
e47306e6 GM |
3846 | don't have to be written. We can't skip if the last |
3847 | current glyph overlaps the glyph to its right. For | |
3848 | example, consider a current row of `if ' with the `f' in | |
3849 | Courier bold so that it overlaps the ` ' to its right. | |
3850 | If the desired row is ` ', we would skip over the space | |
3851 | after the `if' and there would remain a pixel from the | |
3852 | `f' on the screen. */ | |
3853 | if (overlapping_glyphs_p && i > 0) | |
352f1545 | 3854 | { |
e47306e6 GM |
3855 | struct glyph *glyph = ¤t_row->glyphs[TEXT_AREA][i - 1]; |
3856 | int left, right; | |
177c0ea7 | 3857 | |
e47306e6 GM |
3858 | rif->get_glyph_overhangs (glyph, XFRAME (w->frame), |
3859 | &left, &right); | |
91d227d9 | 3860 | can_skip_p = (right == 0 && !abort_skipping); |
352f1545 | 3861 | } |
177c0ea7 | 3862 | |
6d950f4c | 3863 | if (can_skip_p) |
352f1545 | 3864 | { |
91d227d9 CY |
3865 | int start_hpos = i; |
3866 | ||
6d950f4c GM |
3867 | while (i < stop |
3868 | && GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
3869 | { | |
3870 | x += desired_glyph->pixel_width; | |
3871 | ++desired_glyph, ++current_glyph, ++i; | |
3872 | } | |
3873 | ||
3874 | /* Consider the case that the current row contains "xxx | |
3875 | ppp ggg" in italic Courier font, and the desired row | |
3876 | is "xxx ggg". The character `p' has lbearing, `g' | |
3877 | has not. The loop above will stop in front of the | |
3878 | first `p' in the current row. If we would start | |
3879 | writing glyphs there, we wouldn't erase the lbearing | |
3880 | of the `p'. The rest of the lbearing problem is then | |
641bdbf3 | 3881 | taken care of by draw_glyphs. */ |
6d950f4c GM |
3882 | if (overlapping_glyphs_p |
3883 | && i > 0 | |
3884 | && i < current_row->used[TEXT_AREA] | |
3885 | && (current_row->used[TEXT_AREA] | |
3886 | != desired_row->used[TEXT_AREA])) | |
5f5c8ee5 | 3887 | { |
6d950f4c | 3888 | int left, right; |
177c0ea7 | 3889 | |
6d950f4c GM |
3890 | rif->get_glyph_overhangs (current_glyph, XFRAME (w->frame), |
3891 | &left, &right); | |
3892 | while (left > 0 && i > 0) | |
3893 | { | |
3894 | --i, --desired_glyph, --current_glyph; | |
3895 | x -= desired_glyph->pixel_width; | |
3896 | left -= desired_glyph->pixel_width; | |
3897 | } | |
91d227d9 CY |
3898 | |
3899 | /* Abort the skipping algorithm if we end up before | |
3900 | our starting point, to avoid looping (bug#1070). | |
3901 | This can happen when the lbearing is larger than | |
3902 | the pixel width. */ | |
3903 | abort_skipping = (i < start_hpos); | |
5f5c8ee5 | 3904 | } |
352f1545 | 3905 | } |
177c0ea7 | 3906 | |
5f5c8ee5 GM |
3907 | /* Try to avoid writing the entire rest of the desired row |
3908 | by looking for a resync point. This mainly prevents | |
3909 | mode line flickering in the case the mode line is in | |
3910 | fixed-pitch font, which it usually will be. */ | |
3911 | if (i < desired_row->used[TEXT_AREA]) | |
3912 | { | |
3913 | int start_x = x, start_hpos = i; | |
3914 | struct glyph *start = desired_glyph; | |
3915 | int current_x = x; | |
6d950f4c GM |
3916 | int skip_first_p = !can_skip_p; |
3917 | ||
5f5c8ee5 GM |
3918 | /* Find the next glyph that's equal again. */ |
3919 | while (i < stop | |
6d950f4c GM |
3920 | && (skip_first_p |
3921 | || !GLYPH_EQUAL_P (desired_glyph, current_glyph)) | |
5f5c8ee5 GM |
3922 | && x == current_x) |
3923 | { | |
3924 | x += desired_glyph->pixel_width; | |
3925 | current_x += current_glyph->pixel_width; | |
3926 | ++desired_glyph, ++current_glyph, ++i; | |
6d950f4c | 3927 | skip_first_p = 0; |
5f5c8ee5 | 3928 | } |
23b0200c | 3929 | |
5f5c8ee5 GM |
3930 | if (i == start_hpos || x != current_x) |
3931 | { | |
3932 | i = start_hpos; | |
3933 | x = start_x; | |
3934 | desired_glyph = start; | |
3935 | break; | |
3936 | } | |
e47306e6 | 3937 | |
5f5c8ee5 GM |
3938 | rif->cursor_to (vpos, start_hpos, desired_row->y, start_x); |
3939 | rif->write_glyphs (start, i - start_hpos); | |
408f5064 | 3940 | changed_p = 1; |
5f5c8ee5 GM |
3941 | } |
3942 | } | |
177c0ea7 | 3943 | |
5f5c8ee5 GM |
3944 | /* Write the rest. */ |
3945 | if (i < desired_row->used[TEXT_AREA]) | |
3946 | { | |
3947 | rif->cursor_to (vpos, i, desired_row->y, x); | |
3948 | rif->write_glyphs (desired_glyph, desired_row->used[TEXT_AREA] - i); | |
408f5064 | 3949 | changed_p = 1; |
5f5c8ee5 | 3950 | } |
177c0ea7 | 3951 | |
5f5c8ee5 GM |
3952 | /* Maybe clear to end of line. */ |
3953 | if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) | |
3954 | { | |
3955 | /* If new row extends to the end of the text area, nothing | |
3956 | has to be cleared, if and only if we did a write_glyphs | |
3957 | above. This is made sure by setting desired_stop_pos | |
3958 | appropriately above. */ | |
78897758 YM |
3959 | xassert (i < desired_row->used[TEXT_AREA] |
3960 | || ((desired_row->used[TEXT_AREA] | |
3961 | == current_row->used[TEXT_AREA]) | |
3962 | && MATRIX_ROW_EXTENDS_FACE_P (current_row))); | |
5f5c8ee5 GM |
3963 | } |
3964 | else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) | |
3965 | { | |
3966 | /* If old row extends to the end of the text area, clear. */ | |
3967 | if (i >= desired_row->used[TEXT_AREA]) | |
3968 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3969 | desired_row->pixel_width); |
5f5c8ee5 | 3970 | rif->clear_end_of_line (-1); |
408f5064 | 3971 | changed_p = 1; |
5f5c8ee5 GM |
3972 | } |
3973 | else if (desired_row->pixel_width < current_row->pixel_width) | |
2e8907d3 | 3974 | { |
5f5c8ee5 GM |
3975 | /* Otherwise clear to the end of the old row. Everything |
3976 | after that position should be clear already. */ | |
27786b2f | 3977 | int xlim; |
177c0ea7 | 3978 | |
5f5c8ee5 GM |
3979 | if (i >= desired_row->used[TEXT_AREA]) |
3980 | rif->cursor_to (vpos, i, desired_row->y, | |
6b61353c | 3981 | desired_row->pixel_width); |
5f5c8ee5 GM |
3982 | |
3983 | /* If cursor is displayed at the end of the line, make sure | |
3984 | it's cleared. Nowadays we don't have a phys_cursor_glyph | |
3985 | with which to erase the cursor (because this method | |
3986 | doesn't work with lbearing/rbearing), so we must do it | |
3987 | this way. */ | |
3988 | if (vpos == w->phys_cursor.vpos | |
f951a506 EZ |
3989 | && (desired_row->reversed_p |
3990 | ? (w->phys_cursor.hpos < 0) | |
3991 | : (w->phys_cursor.hpos >= desired_row->used[TEXT_AREA]))) | |
5f5c8ee5 GM |
3992 | { |
3993 | w->phys_cursor_on_p = 0; | |
27786b2f | 3994 | xlim = -1; |
5f5c8ee5 GM |
3995 | } |
3996 | else | |
27786b2f PE |
3997 | xlim = current_row->pixel_width; |
3998 | rif->clear_end_of_line (xlim); | |
408f5064 | 3999 | changed_p = 1; |
2e8907d3 | 4000 | } |
23b0200c | 4001 | } |
408f5064 GM |
4002 | |
4003 | return changed_p; | |
23b0200c | 4004 | } |
4588ec20 | 4005 | |
5f5c8ee5 | 4006 | |
408f5064 GM |
4007 | /* Update row VPOS in window W. Value is non-zero if display has been |
4008 | changed. */ | |
5f5c8ee5 | 4009 | |
408f5064 | 4010 | static int |
971de7fb | 4011 | update_window_line (struct window *w, int vpos, int *mouse_face_overwritten_p) |
5f5c8ee5 GM |
4012 | { |
4013 | struct glyph_row *current_row = MATRIX_ROW (w->current_matrix, vpos); | |
4014 | struct glyph_row *desired_row = MATRIX_ROW (w->desired_matrix, vpos); | |
fa971ac3 | 4015 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
408f5064 | 4016 | int changed_p = 0; |
5f5c8ee5 | 4017 | |
5f5c8ee5 GM |
4018 | /* Set the row being updated. This is important to let xterm.c |
4019 | know what line height values are in effect. */ | |
4020 | updated_row = desired_row; | |
4021 | ||
177c0ea7 JB |
4022 | /* A row can be completely invisible in case a desired matrix was |
4023 | built with a vscroll and then make_cursor_line_fully_visible shifts | |
504805ac GM |
4024 | the matrix. Make sure to make such rows current anyway, since |
4025 | we need the correct y-position, for example, in the current matrix. */ | |
001f93f3 GM |
4026 | if (desired_row->mode_line_p |
4027 | || desired_row->visible_height > 0) | |
408f5064 | 4028 | { |
504805ac GM |
4029 | xassert (desired_row->enabled_p); |
4030 | ||
4031 | /* Update display of the left margin area, if there is one. */ | |
4032 | if (!desired_row->full_width_p | |
7df02016 | 4033 | && !NILP (w->left_margin_cols)) |
504805ac GM |
4034 | { |
4035 | changed_p = 1; | |
4036 | update_marginal_area (w, LEFT_MARGIN_AREA, vpos); | |
4037 | } | |
177c0ea7 | 4038 | |
504805ac GM |
4039 | /* Update the display of the text area. */ |
4040 | if (update_text_area (w, vpos)) | |
4041 | { | |
4042 | changed_p = 1; | |
4043 | if (current_row->mouse_face_p) | |
4044 | *mouse_face_overwritten_p = 1; | |
4045 | } | |
177c0ea7 | 4046 | |
504805ac GM |
4047 | /* Update display of the right margin area, if there is one. */ |
4048 | if (!desired_row->full_width_p | |
7df02016 | 4049 | && !NILP (w->right_margin_cols)) |
504805ac GM |
4050 | { |
4051 | changed_p = 1; | |
4052 | update_marginal_area (w, RIGHT_MARGIN_AREA, vpos); | |
4053 | } | |
177c0ea7 | 4054 | |
504805ac GM |
4055 | /* Draw truncation marks etc. */ |
4056 | if (!current_row->enabled_p | |
4057 | || desired_row->y != current_row->y | |
4058 | || desired_row->visible_height != current_row->visible_height | |
6b61353c | 4059 | || desired_row->cursor_in_fringe_p != current_row->cursor_in_fringe_p |
3d4a365f | 4060 | || desired_row->overlay_arrow_bitmap != current_row->overlay_arrow_bitmap |
6b61353c | 4061 | || current_row->redraw_fringe_bitmaps_p |
504805ac | 4062 | || desired_row->mode_line_p != current_row->mode_line_p |
6b61353c | 4063 | || desired_row->exact_window_width_line_p != current_row->exact_window_width_line_p |
504805ac GM |
4064 | || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row) |
4065 | != MATRIX_ROW_CONTINUATION_LINE_P (current_row))) | |
4066 | rif->after_update_window_line_hook (desired_row); | |
408f5064 | 4067 | } |
177c0ea7 | 4068 | |
5f5c8ee5 GM |
4069 | /* Update current_row from desired_row. */ |
4070 | make_current (w->desired_matrix, w->current_matrix, vpos); | |
4071 | updated_row = NULL; | |
408f5064 | 4072 | return changed_p; |
5f5c8ee5 GM |
4073 | } |
4074 | ||
4075 | ||
4076 | /* Set the cursor after an update of window W. This function may only | |
4077 | be called from update_window. */ | |
4078 | ||
4079 | static void | |
971de7fb | 4080 | set_window_cursor_after_update (struct window *w) |
4588ec20 | 4081 | { |
5f5c8ee5 | 4082 | struct frame *f = XFRAME (w->frame); |
fa971ac3 | 4083 | struct redisplay_interface *rif = FRAME_RIF (f); |
5f5c8ee5 GM |
4084 | int cx, cy, vpos, hpos; |
4085 | ||
4086 | /* Not intended for frame matrix updates. */ | |
4087 | xassert (FRAME_WINDOW_P (f)); | |
177c0ea7 | 4088 | |
b96fd3e8 GM |
4089 | if (cursor_in_echo_area |
4090 | && !NILP (echo_area_buffer[0]) | |
4091 | /* If we are showing a message instead of the mini-buffer, | |
4092 | show the cursor for the message instead. */ | |
4093 | && XWINDOW (minibuf_window) == w | |
4094 | && EQ (minibuf_window, echo_area_window) | |
5f5c8ee5 GM |
4095 | /* These cases apply only to the frame that contains |
4096 | the active mini-buffer window. */ | |
4097 | && FRAME_HAS_MINIBUF_P (f) | |
4098 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
4099 | { | |
4100 | cx = cy = vpos = hpos = 0; | |
4101 | ||
4102 | if (cursor_in_echo_area >= 0) | |
4103 | { | |
4104 | /* If the mini-buffer is several lines high, find the last | |
4105 | line that has any text on it. Note: either all lines | |
4106 | are enabled or none. Otherwise we wouldn't be able to | |
4107 | determine Y. */ | |
862b4790 GM |
4108 | struct glyph_row *row, *last_row; |
4109 | struct glyph *glyph; | |
4110 | int yb = window_text_bottom_y (w); | |
5f5c8ee5 | 4111 | |
862b4790 | 4112 | last_row = NULL; |
6206f8ce GM |
4113 | row = w->current_matrix->rows; |
4114 | while (row->enabled_p | |
4115 | && (last_row == NULL | |
4116 | || MATRIX_ROW_BOTTOM_Y (row) <= yb)) | |
5f5c8ee5 | 4117 | { |
862b4790 GM |
4118 | if (row->used[TEXT_AREA] |
4119 | && row->glyphs[TEXT_AREA][0].charpos >= 0) | |
4120 | last_row = row; | |
6206f8ce | 4121 | ++row; |
862b4790 | 4122 | } |
177c0ea7 | 4123 | |
5f5c8ee5 GM |
4124 | if (last_row) |
4125 | { | |
6206f8ce GM |
4126 | struct glyph *start = last_row->glyphs[TEXT_AREA]; |
4127 | struct glyph *last = start + last_row->used[TEXT_AREA] - 1; | |
862b4790 | 4128 | |
b96fd3e8 | 4129 | while (last > start && last->charpos < 0) |
862b4790 | 4130 | --last; |
177c0ea7 | 4131 | |
862b4790 GM |
4132 | for (glyph = start; glyph < last; ++glyph) |
4133 | { | |
4134 | cx += glyph->pixel_width; | |
4135 | ++hpos; | |
4136 | } | |
4137 | ||
5f5c8ee5 | 4138 | cy = last_row->y; |
862b4790 | 4139 | vpos = MATRIX_ROW_VPOS (last_row, w->current_matrix); |
5f5c8ee5 GM |
4140 | } |
4141 | } | |
4142 | } | |
4143 | else | |
4144 | { | |
4145 | cx = w->cursor.x; | |
4146 | cy = w->cursor.y; | |
4147 | hpos = w->cursor.hpos; | |
4148 | vpos = w->cursor.vpos; | |
4149 | } | |
4588ec20 | 4150 | |
5f5c8ee5 | 4151 | /* Window cursor can be out of sync for horizontally split windows. */ |
f951a506 | 4152 | hpos = max (-1, hpos); /* -1 is for when cursor is on the left fringe */ |
5f5c8ee5 GM |
4153 | hpos = min (w->current_matrix->matrix_w - 1, hpos); |
4154 | vpos = max (0, vpos); | |
4155 | vpos = min (w->current_matrix->nrows - 1, vpos); | |
4156 | rif->cursor_to (vpos, hpos, cy, cx); | |
4588ec20 | 4157 | } |
4588ec20 | 4158 | |
5f5c8ee5 | 4159 | |
6df5d75f GM |
4160 | /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window |
4161 | tree rooted at W. */ | |
4162 | ||
4163 | void | |
971de7fb | 4164 | set_window_update_flags (struct window *w, int on_p) |
6df5d75f GM |
4165 | { |
4166 | while (w) | |
4167 | { | |
4168 | if (!NILP (w->hchild)) | |
4169 | set_window_update_flags (XWINDOW (w->hchild), on_p); | |
4170 | else if (!NILP (w->vchild)) | |
4171 | set_window_update_flags (XWINDOW (w->vchild), on_p); | |
4172 | else | |
4173 | w->must_be_updated_p = on_p; | |
4174 | ||
4175 | w = NILP (w->next) ? 0 : XWINDOW (w->next); | |
4176 | } | |
177c0ea7 | 4177 | } |
6df5d75f GM |
4178 | |
4179 | ||
4180 | \f | |
4181 | /*********************************************************************** | |
4182 | Window-Based Scrolling | |
4183 | ***********************************************************************/ | |
4184 | ||
4185 | /* Structure describing rows in scrolling_window. */ | |
4186 | ||
4187 | struct row_entry | |
4188 | { | |
4189 | /* Number of occurrences of this row in desired and current matrix. */ | |
4190 | int old_uses, new_uses; | |
177c0ea7 | 4191 | |
6df5d75f GM |
4192 | /* Vpos of row in new matrix. */ |
4193 | int new_line_number; | |
4194 | ||
4195 | /* Bucket index of this row_entry in the hash table row_table. */ | |
ca9ce8f2 | 4196 | ptrdiff_t bucket; |
177c0ea7 | 4197 | |
6df5d75f GM |
4198 | /* The row described by this entry. */ |
4199 | struct glyph_row *row; | |
177c0ea7 | 4200 | |
6df5d75f GM |
4201 | /* Hash collision chain. */ |
4202 | struct row_entry *next; | |
4203 | }; | |
4204 | ||
4205 | /* A pool to allocate row_entry structures from, and the size of the | |
4206 | pool. The pool is reallocated in scrolling_window when we find | |
4207 | that we need a larger one. */ | |
4208 | ||
4209 | static struct row_entry *row_entry_pool; | |
ca9ce8f2 | 4210 | static ptrdiff_t row_entry_pool_size; |
6df5d75f GM |
4211 | |
4212 | /* Index of next free entry in row_entry_pool. */ | |
4213 | ||
ca9ce8f2 | 4214 | static ptrdiff_t row_entry_idx; |
6df5d75f GM |
4215 | |
4216 | /* The hash table used during scrolling, and the table's size. This | |
4217 | table is used to quickly identify equal rows in the desired and | |
4218 | current matrix. */ | |
4219 | ||
4220 | static struct row_entry **row_table; | |
ca9ce8f2 | 4221 | static ptrdiff_t row_table_size; |
6df5d75f GM |
4222 | |
4223 | /* Vectors of pointers to row_entry structures belonging to the | |
4224 | current and desired matrix, and the size of the vectors. */ | |
4225 | ||
4226 | static struct row_entry **old_lines, **new_lines; | |
0065d054 | 4227 | static ptrdiff_t old_lines_size, new_lines_size; |
6df5d75f GM |
4228 | |
4229 | /* A pool to allocate run structures from, and its size. */ | |
4230 | ||
4231 | static struct run *run_pool; | |
0065d054 | 4232 | static ptrdiff_t runs_size; |
6df5d75f GM |
4233 | |
4234 | /* A vector of runs of lines found during scrolling. */ | |
4235 | ||
4236 | static struct run **runs; | |
4237 | ||
6b1f9ba4 | 4238 | /* Add glyph row ROW to the scrolling hash table. */ |
6df5d75f | 4239 | |
55d4c1b2 | 4240 | static inline struct row_entry * |
6b1f9ba4 | 4241 | add_row_entry (struct glyph_row *row) |
6df5d75f GM |
4242 | { |
4243 | struct row_entry *entry; | |
ca9ce8f2 | 4244 | ptrdiff_t i = row->hash % row_table_size; |
177c0ea7 | 4245 | |
6df5d75f | 4246 | entry = row_table[i]; |
68c95424 | 4247 | xassert (entry || verify_row_hash (row)); |
6b1f9ba4 | 4248 | while (entry && !row_equal_p (entry->row, row, 1)) |
6df5d75f | 4249 | entry = entry->next; |
177c0ea7 | 4250 | |
6df5d75f GM |
4251 | if (entry == NULL) |
4252 | { | |
4253 | entry = row_entry_pool + row_entry_idx++; | |
4254 | entry->row = row; | |
4255 | entry->old_uses = entry->new_uses = 0; | |
4256 | entry->new_line_number = 0; | |
4257 | entry->bucket = i; | |
4258 | entry->next = row_table[i]; | |
4259 | row_table[i] = entry; | |
4260 | } | |
4261 | ||
4262 | return entry; | |
4263 | } | |
4264 | ||
4265 | ||
5f5c8ee5 | 4266 | /* Try to reuse part of the current display of W by scrolling lines. |
153a073c | 4267 | HEADER_LINE_P non-zero means W has a header line. |
5f5c8ee5 GM |
4268 | |
4269 | The algorithm is taken from Communications of the ACM, Apr78 "A | |
4270 | Technique for Isolating Differences Between Files." It should take | |
4271 | O(N) time. | |
4272 | ||
4273 | A short outline of the steps of the algorithm | |
4274 | ||
4275 | 1. Skip lines equal at the start and end of both matrices. | |
4276 | ||
4277 | 2. Enter rows in the current and desired matrix into a symbol | |
4278 | table, counting how often they appear in both matrices. | |
4279 | ||
4280 | 3. Rows that appear exactly once in both matrices serve as anchors, | |
4281 | i.e. we assume that such lines are likely to have been moved. | |
4282 | ||
4283 | 4. Starting from anchor lines, extend regions to be scrolled both | |
4284 | forward and backward. | |
4285 | ||
4286 | Value is | |
4287 | ||
4288 | -1 if all rows were found to be equal. | |
4289 | 0 to indicate that we did not scroll the display, or | |
4290 | 1 if we did scroll. */ | |
4291 | ||
4292 | static int | |
971de7fb | 4293 | scrolling_window (struct window *w, int header_line_p) |
4588ec20 | 4294 | { |
5f5c8ee5 GM |
4295 | struct glyph_matrix *desired_matrix = w->desired_matrix; |
4296 | struct glyph_matrix *current_matrix = w->current_matrix; | |
4297 | int yb = window_text_bottom_y (w); | |
ca9ce8f2 PE |
4298 | ptrdiff_t i; |
4299 | int j, first_old, first_new, last_old, last_new; | |
4300 | int nruns, run_idx; | |
0065d054 | 4301 | ptrdiff_t n; |
6df5d75f | 4302 | struct row_entry *entry; |
fa971ac3 | 4303 | struct redisplay_interface *rif = FRAME_RIF (XFRAME (WINDOW_FRAME (w))); |
5f5c8ee5 GM |
4304 | |
4305 | /* Skip over rows equal at the start. */ | |
bfdcafe1 | 4306 | for (i = header_line_p ? 1 : 0; i < current_matrix->nrows - 1; ++i) |
5f5c8ee5 | 4307 | { |
bfdcafe1 GM |
4308 | struct glyph_row *d = MATRIX_ROW (desired_matrix, i); |
4309 | struct glyph_row *c = MATRIX_ROW (current_matrix, i); | |
4310 | ||
4311 | if (c->enabled_p | |
4312 | && d->enabled_p | |
6b61353c | 4313 | && !d->redraw_fringe_bitmaps_p |
bfdcafe1 GM |
4314 | && c->y == d->y |
4315 | && MATRIX_ROW_BOTTOM_Y (c) <= yb | |
4316 | && MATRIX_ROW_BOTTOM_Y (d) <= yb | |
6b1f9ba4 | 4317 | && row_equal_p (c, d, 1)) |
bfdcafe1 GM |
4318 | { |
4319 | assign_row (c, d); | |
4320 | d->enabled_p = 0; | |
4321 | } | |
4322 | else | |
4323 | break; | |
5f5c8ee5 | 4324 | } |
4588ec20 | 4325 | |
5f5c8ee5 GM |
4326 | /* Give up if some rows in the desired matrix are not enabled. */ |
4327 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) | |
4328 | return -1; | |
177c0ea7 | 4329 | |
5f5c8ee5 GM |
4330 | first_old = first_new = i; |
4331 | ||
4d8ade89 YM |
4332 | /* Set last_new to the index + 1 of the row that reaches the |
4333 | bottom boundary in the desired matrix. Give up if we find a | |
4334 | disabled row before we reach the bottom boundary. */ | |
5f5c8ee5 | 4335 | i = first_new + 1; |
4d8ade89 YM |
4336 | while (i < desired_matrix->nrows - 1) |
4337 | { | |
4338 | int bottom; | |
5f5c8ee5 | 4339 | |
4d8ade89 YM |
4340 | if (!MATRIX_ROW (desired_matrix, i)->enabled_p) |
4341 | return 0; | |
4342 | bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix, i)); | |
4343 | if (bottom <= yb) | |
4344 | ++i; | |
4345 | if (bottom >= yb) | |
4346 | break; | |
4347 | } | |
5f5c8ee5 GM |
4348 | |
4349 | last_new = i; | |
4350 | ||
4d8ade89 YM |
4351 | /* Set last_old to the index + 1 of the row that reaches the bottom |
4352 | boundary in the current matrix. We don't look at the enabled | |
4353 | flag here because we plan to reuse part of the display even if | |
4354 | other parts are disabled. */ | |
5f5c8ee5 | 4355 | i = first_old + 1; |
93962bfa GM |
4356 | while (i < current_matrix->nrows - 1) |
4357 | { | |
4358 | int bottom = MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix, i)); | |
4359 | if (bottom <= yb) | |
4360 | ++i; | |
4361 | if (bottom >= yb) | |
4362 | break; | |
4363 | } | |
4364 | ||
5f5c8ee5 GM |
4365 | last_old = i; |
4366 | ||
4367 | /* Skip over rows equal at the bottom. */ | |
4368 | i = last_new; | |
4369 | j = last_old; | |
4370 | while (i - 1 > first_new | |
4371 | && j - 1 > first_old | |
1e5b2111 EZ |
4372 | && MATRIX_ROW (current_matrix, j - 1)->enabled_p |
4373 | && (MATRIX_ROW (current_matrix, j - 1)->y | |
4374 | == MATRIX_ROW (desired_matrix, i - 1)->y) | |
4375 | && !MATRIX_ROW (desired_matrix, i - 1)->redraw_fringe_bitmaps_p | |
6b1f9ba4 | 4376 | && row_equal_p (MATRIX_ROW (desired_matrix, i - 1), |
e4e0bee9 | 4377 | MATRIX_ROW (current_matrix, j - 1), 1)) |
5f5c8ee5 GM |
4378 | --i, --j; |
4379 | last_new = i; | |
4380 | last_old = j; | |
4381 | ||
4382 | /* Nothing to do if all rows are equal. */ | |
4383 | if (last_new == first_new) | |
4384 | return 0; | |
4385 | ||
0065d054 | 4386 | /* Check for integer overflow in size calculation. |
ca9ce8f2 PE |
4387 | |
4388 | If next_almost_prime checks (N) for divisibility by 2..10, then | |
4389 | it can return at most N + 10, e.g., next_almost_prime (1) == 11. | |
4390 | So, set next_almost_prime_increment_max to 10. | |
4391 | ||
4392 | It's just a coincidence that next_almost_prime_increment_max == | |
4393 | NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were | |
4394 | 13, then next_almost_prime_increment_max would be 14, e.g., | |
4395 | because next_almost_prime (113) would be 127. */ | |
4396 | { | |
4397 | verify (NEXT_ALMOST_PRIME_LIMIT == 11); | |
4398 | enum { next_almost_prime_increment_max = 10 }; | |
ca9ce8f2 | 4399 | ptrdiff_t row_table_max = |
0065d054 PE |
4400 | (min (PTRDIFF_MAX, SIZE_MAX) / (3 * sizeof *row_table) |
4401 | - next_almost_prime_increment_max); | |
4402 | ptrdiff_t current_nrows_max = row_table_max - desired_matrix->nrows; | |
4403 | if (current_nrows_max < current_matrix->nrows) | |
ca9ce8f2 PE |
4404 | memory_full (SIZE_MAX); |
4405 | } | |
4406 | ||
6df5d75f | 4407 | /* Reallocate vectors, tables etc. if necessary. */ |
177c0ea7 | 4408 | |
6df5d75f | 4409 | if (current_matrix->nrows > old_lines_size) |
0065d054 PE |
4410 | old_lines = xpalloc (old_lines, &old_lines_size, |
4411 | current_matrix->nrows - old_lines_size, | |
4412 | INT_MAX, sizeof *old_lines); | |
177c0ea7 | 4413 | |
6df5d75f | 4414 | if (desired_matrix->nrows > new_lines_size) |
0065d054 PE |
4415 | new_lines = xpalloc (new_lines, &new_lines_size, |
4416 | desired_matrix->nrows - new_lines_size, | |
4417 | INT_MAX, sizeof *new_lines); | |
6df5d75f | 4418 | |
ca9ce8f2 PE |
4419 | n = desired_matrix->nrows; |
4420 | n += current_matrix->nrows; | |
0065d054 | 4421 | if (row_table_size < 3 * n) |
6df5d75f | 4422 | { |
ca9ce8f2 | 4423 | ptrdiff_t size = next_almost_prime (3 * n); |
0065d054 | 4424 | row_table = xnrealloc (row_table, size, sizeof *row_table); |
ca9ce8f2 | 4425 | row_table_size = size; |
0065d054 | 4426 | memset (row_table, 0, size * sizeof *row_table); |
6df5d75f GM |
4427 | } |
4428 | ||
4429 | if (n > row_entry_pool_size) | |
0065d054 PE |
4430 | row_entry_pool = xpalloc (row_entry_pool, &row_entry_pool_size, |
4431 | n - row_entry_pool_size, | |
4432 | -1, sizeof *row_entry_pool); | |
6df5d75f GM |
4433 | |
4434 | if (desired_matrix->nrows > runs_size) | |
4435 | { | |
0065d054 PE |
4436 | runs = xnrealloc (runs, desired_matrix->nrows, sizeof *runs); |
4437 | run_pool = xnrealloc (run_pool, desired_matrix->nrows, sizeof *run_pool); | |
ca9ce8f2 | 4438 | runs_size = desired_matrix->nrows; |
6df5d75f GM |
4439 | } |
4440 | ||
4441 | nruns = run_idx = 0; | |
4442 | row_entry_idx = 0; | |
4443 | ||
4444 | /* Add rows from the current and desired matrix to the hash table | |
4445 | row_hash_table to be able to find equal ones quickly. */ | |
177c0ea7 | 4446 | |
5f5c8ee5 GM |
4447 | for (i = first_old; i < last_old; ++i) |
4448 | { | |
4449 | if (MATRIX_ROW (current_matrix, i)->enabled_p) | |
4450 | { | |
6b1f9ba4 | 4451 | entry = add_row_entry (MATRIX_ROW (current_matrix, i)); |
6df5d75f GM |
4452 | old_lines[i] = entry; |
4453 | ++entry->old_uses; | |
5f5c8ee5 GM |
4454 | } |
4455 | else | |
6df5d75f | 4456 | old_lines[i] = NULL; |
5f5c8ee5 GM |
4457 | } |
4458 | ||
5f5c8ee5 GM |
4459 | for (i = first_new; i < last_new; ++i) |
4460 | { | |
4461 | xassert (MATRIX_ROW_ENABLED_P (desired_matrix, i)); | |
6b1f9ba4 | 4462 | entry = add_row_entry (MATRIX_ROW (desired_matrix, i)); |
6df5d75f GM |
4463 | ++entry->new_uses; |
4464 | entry->new_line_number = i; | |
4465 | new_lines[i] = entry; | |
5f5c8ee5 | 4466 | } |
4588ec20 | 4467 | |
5f5c8ee5 GM |
4468 | /* Identify moves based on lines that are unique and equal |
4469 | in both matrices. */ | |
4470 | for (i = first_old; i < last_old;) | |
6df5d75f GM |
4471 | if (old_lines[i] |
4472 | && old_lines[i]->old_uses == 1 | |
4473 | && old_lines[i]->new_uses == 1) | |
5f5c8ee5 | 4474 | { |
27786b2f | 4475 | int p, q; |
6df5d75f GM |
4476 | int new_line = old_lines[i]->new_line_number; |
4477 | struct run *run = run_pool + run_idx++; | |
5f5c8ee5 GM |
4478 | |
4479 | /* Record move. */ | |
4480 | run->current_vpos = i; | |
4481 | run->current_y = MATRIX_ROW (current_matrix, i)->y; | |
4482 | run->desired_vpos = new_line; | |
4483 | run->desired_y = MATRIX_ROW (desired_matrix, new_line)->y; | |
4484 | run->nrows = 1; | |
4485 | run->height = MATRIX_ROW (current_matrix, i)->height; | |
4486 | ||
4487 | /* Extend backward. */ | |
27786b2f PE |
4488 | p = i - 1; |
4489 | q = new_line - 1; | |
4490 | while (p > first_old | |
4491 | && q > first_new | |
4492 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4493 | { |
27786b2f | 4494 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 JB |
4495 | --run->current_vpos; |
4496 | --run->desired_vpos; | |
5f5c8ee5 GM |
4497 | ++run->nrows; |
4498 | run->height += h; | |
4499 | run->desired_y -= h; | |
4500 | run->current_y -= h; | |
27786b2f | 4501 | --p, --q; |
5f5c8ee5 | 4502 | } |
4588ec20 | 4503 | |
5f5c8ee5 | 4504 | /* Extend forward. */ |
27786b2f PE |
4505 | p = i + 1; |
4506 | q = new_line + 1; | |
4507 | while (p < last_old | |
4508 | && q < last_new | |
4509 | && old_lines[p] == new_lines[q]) | |
5f5c8ee5 | 4510 | { |
27786b2f | 4511 | int h = MATRIX_ROW (current_matrix, p)->height; |
177c0ea7 | 4512 | ++run->nrows; |
5f5c8ee5 | 4513 | run->height += h; |
27786b2f | 4514 | ++p, ++q; |
5f5c8ee5 | 4515 | } |
19dff8dc | 4516 | |
5f5c8ee5 GM |
4517 | /* Insert run into list of all runs. Order runs by copied |
4518 | pixel lines. Note that we record runs that don't have to | |
4519 | be copied because they are already in place. This is done | |
4520 | because we can avoid calling update_window_line in this | |
4521 | case. */ | |
27786b2f | 4522 | for (p = 0; p < nruns && runs[p]->height > run->height; ++p) |
5f5c8ee5 | 4523 | ; |
27786b2f PE |
4524 | for (q = nruns; q > p; --q) |
4525 | runs[q] = runs[q - 1]; | |
4526 | runs[p] = run; | |
5f5c8ee5 GM |
4527 | ++nruns; |
4528 | ||
4529 | i += run->nrows; | |
4530 | } | |
4531 | else | |
4532 | ++i; | |
4588ec20 | 4533 | |
5f5c8ee5 GM |
4534 | /* Do the moves. Do it in a way that we don't overwrite something |
4535 | we want to copy later on. This is not solvable in general | |
4536 | because there is only one display and we don't have a way to | |
4537 | exchange areas on this display. Example: | |
4588ec20 | 4538 | |
5f5c8ee5 GM |
4539 | +-----------+ +-----------+ |
4540 | | A | | B | | |
4541 | +-----------+ --> +-----------+ | |
4542 | | B | | A | | |
4543 | +-----------+ +-----------+ | |
4588ec20 | 4544 | |
5f5c8ee5 GM |
4545 | Instead, prefer bigger moves, and invalidate moves that would |
4546 | copy from where we copied to. */ | |
ea0d86af | 4547 | |
5f5c8ee5 GM |
4548 | for (i = 0; i < nruns; ++i) |
4549 | if (runs[i]->nrows > 0) | |
4550 | { | |
4551 | struct run *r = runs[i]; | |
24e86043 | 4552 | |
5f5c8ee5 GM |
4553 | /* Copy on the display. */ |
4554 | if (r->current_y != r->desired_y) | |
4555 | { | |
989b42d2 | 4556 | rif->clear_window_mouse_face (w); |
5f5c8ee5 | 4557 | rif->scroll_run_hook (w, r); |
1305621b YM |
4558 | } |
4559 | ||
4560 | /* Truncate runs that copy to where we copied to, and | |
4561 | invalidate runs that copy from where we copied to. */ | |
4562 | for (j = nruns - 1; j > i; --j) | |
4563 | { | |
4564 | struct run *p = runs[j]; | |
4565 | int truncated_p = 0; | |
5f5c8ee5 | 4566 | |
1305621b YM |
4567 | if (p->nrows > 0 |
4568 | && p->desired_y < r->desired_y + r->height | |
4569 | && p->desired_y + p->height > r->desired_y) | |
5f5c8ee5 | 4570 | { |
1305621b YM |
4571 | if (p->desired_y < r->desired_y) |
4572 | { | |
4573 | p->nrows = r->desired_vpos - p->desired_vpos; | |
4574 | p->height = r->desired_y - p->desired_y; | |
4575 | truncated_p = 1; | |
4576 | } | |
4577 | else | |
4578 | { | |
4579 | int nrows_copied = (r->desired_vpos + r->nrows | |
4580 | - p->desired_vpos); | |
4581 | ||
4582 | if (p->nrows <= nrows_copied) | |
4583 | p->nrows = 0; | |
4584 | else | |
4585 | { | |
4586 | int height_copied = (r->desired_y + r->height | |
4587 | - p->desired_y); | |
4588 | ||
4589 | p->current_vpos += nrows_copied; | |
4590 | p->desired_vpos += nrows_copied; | |
4591 | p->nrows -= nrows_copied; | |
4592 | p->current_y += height_copied; | |
4593 | p->desired_y += height_copied; | |
4594 | p->height -= height_copied; | |
4595 | truncated_p = 1; | |
4596 | } | |
4597 | } | |
4598 | } | |
177c0ea7 | 4599 | |
1305621b YM |
4600 | if (r->current_y != r->desired_y |
4601 | /* The condition below is equivalent to | |
4602 | ((p->current_y >= r->desired_y | |
5f5c8ee5 | 4603 | && p->current_y < r->desired_y + r->height) |
1305621b | 4604 | || (p->current_y + p->height > r->desired_y |
5f5c8ee5 | 4605 | && (p->current_y + p->height |
1305621b YM |
4606 | <= r->desired_y + r->height))) |
4607 | because we have 0 < p->height <= r->height. */ | |
4608 | && p->current_y < r->desired_y + r->height | |
4609 | && p->current_y + p->height > r->desired_y) | |
4610 | p->nrows = 0; | |
4611 | ||
4612 | /* Reorder runs by copied pixel lines if truncated. */ | |
4613 | if (truncated_p && p->nrows > 0) | |
4614 | { | |
4615 | int k = nruns - 1; | |
4616 | ||
4617 | while (runs[k]->nrows == 0 || runs[k]->height < p->height) | |
4618 | k--; | |
4619 | memmove (runs + j, runs + j + 1, (k - j) * sizeof (*runs)); | |
4620 | runs[k] = p; | |
5f5c8ee5 GM |
4621 | } |
4622 | } | |
ea0d86af | 4623 | |
5f5c8ee5 GM |
4624 | /* Assign matrix rows. */ |
4625 | for (j = 0; j < r->nrows; ++j) | |
4626 | { | |
4627 | struct glyph_row *from, *to; | |
408f5064 | 4628 | int to_overlapped_p; |
e876ff42 | 4629 | |
5f5c8ee5 GM |
4630 | to = MATRIX_ROW (current_matrix, r->desired_vpos + j); |
4631 | from = MATRIX_ROW (desired_matrix, r->desired_vpos + j); | |
e876ff42 | 4632 | to_overlapped_p = to->overlapped_p; |
e61124cd | 4633 | from->redraw_fringe_bitmaps_p = from->fringe_bitmap_periodic_p; |
5f5c8ee5 | 4634 | assign_row (to, from); |
1305621b YM |
4635 | /* The above `assign_row' actually does swap, so if we had |
4636 | an overlap in the copy destination of two runs, then | |
4637 | the second run would assign a previously disabled bogus | |
4638 | row. But thanks to the truncation code in the | |
4639 | preceding for-loop, we no longer have such an overlap, | |
4640 | and thus the assigned row should always be enabled. */ | |
4641 | xassert (to->enabled_p); | |
4642 | from->enabled_p = 0; | |
408f5064 | 4643 | to->overlapped_p = to_overlapped_p; |
5f5c8ee5 GM |
4644 | } |
4645 | } | |
15874c59 | 4646 | |
6df5d75f GM |
4647 | /* Clear the hash table, for the next time. */ |
4648 | for (i = 0; i < row_entry_idx; ++i) | |
4649 | row_table[row_entry_pool[i].bucket] = NULL; | |
4650 | ||
aec1708a PE |
4651 | /* Value is 1 to indicate that we scrolled the display. */ |
4652 | return 0 < nruns; | |
5f5c8ee5 | 4653 | } |
de83c314 | 4654 | |
15874c59 | 4655 | |
4588ec20 | 4656 | \f |
5f5c8ee5 GM |
4657 | /************************************************************************ |
4658 | Frame-Based Updates | |
4659 | ************************************************************************/ | |
4588ec20 | 4660 | |
5f5c8ee5 | 4661 | /* Update the desired frame matrix of frame F. |
4588ec20 | 4662 | |
5f5c8ee5 GM |
4663 | FORCE_P non-zero means that the update should not be stopped by |
4664 | pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling | |
4665 | should not be tried. | |
4666 | ||
4667 | Value is non-zero if update was stopped due to pending input. */ | |
4668 | ||
4669 | static int | |
971de7fb | 4670 | update_frame_1 (struct frame *f, int force_p, int inhibit_id_p) |
4588ec20 | 4671 | { |
5f5c8ee5 GM |
4672 | /* Frame matrices to work on. */ |
4673 | struct glyph_matrix *current_matrix = f->current_matrix; | |
4674 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
4675 | int i; | |
27786b2f | 4676 | int pause_p; |
4588ec20 | 4677 | int preempt_count = baud_rate / 2400 + 1; |
5f5c8ee5 GM |
4678 | |
4679 | xassert (current_matrix && desired_matrix); | |
4588ec20 | 4680 | |
c37e4889 RS |
4681 | if (baud_rate != FRAME_COST_BAUD_RATE (f)) |
4682 | calculate_costs (f); | |
4683 | ||
d88c2b9e RS |
4684 | if (preempt_count <= 0) |
4685 | preempt_count = 1; | |
4686 | ||
a2130dbb KS |
4687 | #if !PERIODIC_PREEMPTION_CHECKING |
4688 | if (!force_p && detect_input_pending_ignore_squeezables ()) | |
4588ec20 | 4689 | { |
27786b2f | 4690 | pause_p = 1; |
4588ec20 JB |
4691 | goto do_pause; |
4692 | } | |
d012c62b | 4693 | #endif |
4588ec20 | 4694 | |
5f5c8ee5 | 4695 | /* If we cannot insert/delete lines, it's no use trying it. */ |
daf01701 | 4696 | if (!FRAME_LINE_INS_DEL_OK (f)) |
5f5c8ee5 | 4697 | inhibit_id_p = 1; |
7098a0fa | 4698 | |
efb859b4 | 4699 | /* See if any of the desired lines are enabled; don't compute for |
5f5c8ee5 GM |
4700 | i/d line if just want cursor motion. */ |
4701 | for (i = 0; i < desired_matrix->nrows; i++) | |
4702 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
4588ec20 JB |
4703 | break; |
4704 | ||
4705 | /* Try doing i/d line, if not yet inhibited. */ | |
5f5c8ee5 GM |
4706 | if (!inhibit_id_p && i < desired_matrix->nrows) |
4707 | force_p |= scrolling (f); | |
4588ec20 JB |
4708 | |
4709 | /* Update the individual lines as needed. Do bottom line first. */ | |
5f5c8ee5 GM |
4710 | if (MATRIX_ROW_ENABLED_P (desired_matrix, desired_matrix->nrows - 1)) |
4711 | update_frame_line (f, desired_matrix->nrows - 1); | |
4588ec20 | 4712 | |
5f5c8ee5 GM |
4713 | /* Now update the rest of the lines. */ |
4714 | for (i = 0; i < desired_matrix->nrows - 1 && (force_p || !input_pending); i++) | |
4588ec20 | 4715 | { |
5f5c8ee5 | 4716 | if (MATRIX_ROW_ENABLED_P (desired_matrix, i)) |
4588ec20 | 4717 | { |
b6a65ac2 | 4718 | if (FRAME_TERMCAP_P (f)) |
4588ec20 JB |
4719 | { |
4720 | /* Flush out every so many lines. | |
4721 | Also flush out if likely to have more than 1k buffered | |
4722 | otherwise. I'm told that some telnet connections get | |
4723 | really screwed by more than 1k output at once. */ | |
fced92f1 CY |
4724 | FILE *display_output = FRAME_TTY (f)->output; |
4725 | if (display_output) | |
4588ec20 | 4726 | { |
fced92f1 CY |
4727 | int outq = PENDING_OUTPUT_COUNT (display_output); |
4728 | if (outq > 900 | |
4729 | || (outq > 20 && ((i - 1) % preempt_count == 0))) | |
4588ec20 | 4730 | { |
fced92f1 CY |
4731 | fflush (display_output); |
4732 | if (preempt_count == 1) | |
4733 | { | |
a41f8bed | 4734 | #ifdef EMACS_OUTQSIZE |
fced92f1 CY |
4735 | if (EMACS_OUTQSIZE (0, &outq) < 0) |
4736 | /* Probably not a tty. Ignore the error and reset | |
4737 | the outq count. */ | |
4738 | outq = PENDING_OUTPUT_COUNT (FRAME_TTY (f->output)); | |
4588ec20 | 4739 | #endif |
fced92f1 CY |
4740 | outq *= 10; |
4741 | if (baud_rate <= outq && baud_rate > 0) | |
4742 | sleep (outq / baud_rate); | |
4743 | } | |
4588ec20 JB |
4744 | } |
4745 | } | |
4588ec20 JB |
4746 | } |
4747 | ||
d012c62b KS |
4748 | #if PERIODIC_PREEMPTION_CHECKING |
4749 | if (!force_p) | |
4750 | { | |
4751 | EMACS_TIME tm, dif; | |
4752 | EMACS_GET_TIME (tm); | |
4753 | EMACS_SUB_TIME (dif, preemption_next_check, tm); | |
4754 | if (EMACS_TIME_NEG_P (dif)) | |
4755 | { | |
4756 | EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); | |
993d4ab6 KS |
4757 | if (detect_input_pending_ignore_squeezables ()) |
4758 | break; | |
d012c62b KS |
4759 | } |
4760 | } | |
4761 | #else | |
4762 | if (!force_p && (i - 1) % preempt_count == 0) | |
a2d5fca0 | 4763 | detect_input_pending_ignore_squeezables (); |
d012c62b | 4764 | #endif |
a2960116 | 4765 | |
5f5c8ee5 | 4766 | update_frame_line (f, i); |
4588ec20 | 4767 | } |
4588ec20 | 4768 | } |
177c0ea7 | 4769 | |
27786b2f | 4770 | pause_p = (i < FRAME_LINES (f) - 1) ? i : 0; |
4588ec20 JB |
4771 | |
4772 | /* Now just clean up termcap drivers and set cursor, etc. */ | |
27786b2f | 4773 | if (!pause_p) |
4588ec20 | 4774 | { |
48cf7030 | 4775 | if ((cursor_in_echo_area |
5f5c8ee5 | 4776 | /* If we are showing a message instead of the mini-buffer, |
2577053b | 4777 | show the cursor for the message instead of for the |
5f5c8ee5 | 4778 | (now hidden) mini-buffer contents. */ |
2577053b RS |
4779 | || (EQ (minibuf_window, selected_window) |
4780 | && EQ (minibuf_window, echo_area_window) | |
b96fd3e8 | 4781 | && !NILP (echo_area_buffer[0]))) |
2577053b | 4782 | /* These cases apply only to the frame that contains |
5f5c8ee5 | 4783 | the active mini-buffer window. */ |
2577053b | 4784 | && FRAME_HAS_MINIBUF_P (f) |
140f8645 | 4785 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) |
1113d9db | 4786 | { |
7df02016 | 4787 | int top = WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))); |
648fa17d JB |
4788 | int row, col; |
4789 | ||
4790 | if (cursor_in_echo_area < 0) | |
4791 | { | |
5f5c8ee5 GM |
4792 | /* Negative value of cursor_in_echo_area means put |
4793 | cursor at beginning of line. */ | |
648fa17d JB |
4794 | row = top; |
4795 | col = 0; | |
4796 | } | |
1113d9db | 4797 | else |
648fa17d | 4798 | { |
5f5c8ee5 GM |
4799 | /* Positive value of cursor_in_echo_area means put |
4800 | cursor at the end of the prompt. If the mini-buffer | |
4801 | is several lines high, find the last line that has | |
4802 | any text on it. */ | |
7df02016 | 4803 | row = FRAME_LINES (f); |
177c0ea7 | 4804 | do |
648fa17d | 4805 | { |
5f5c8ee5 GM |
4806 | --row; |
4807 | col = 0; | |
177c0ea7 | 4808 | |
5f5c8ee5 GM |
4809 | if (MATRIX_ROW_ENABLED_P (current_matrix, row)) |
4810 | { | |
4811 | /* Frame rows are filled up with spaces that | |
4812 | must be ignored here. */ | |
5f5c8ee5 GM |
4813 | struct glyph_row *r = MATRIX_ROW (current_matrix, |
4814 | row); | |
4815 | struct glyph *start = r->glyphs[TEXT_AREA]; | |
4816 | struct glyph *last = start + r->used[TEXT_AREA]; | |
4817 | ||
4818 | while (last > start | |
4819 | && (last - 1)->charpos < 0) | |
4820 | --last; | |
177c0ea7 | 4821 | |
5f5c8ee5 GM |
4822 | col = last - start; |
4823 | } | |
648fa17d JB |
4824 | } |
4825 | while (row > top && col == 0); | |
4826 | ||
6395da5c | 4827 | /* Make sure COL is not out of range. */ |
868e640e | 4828 | if (col >= FRAME_CURSOR_X_LIMIT (f)) |
648fa17d | 4829 | { |
6395da5c | 4830 | /* If we have another row, advance cursor into it. */ |
7df02016 | 4831 | if (row < FRAME_LINES (f) - 1) |
6395da5c | 4832 | { |
7df02016 | 4833 | col = FRAME_LEFT_SCROLL_BAR_COLS (f); |
6395da5c RS |
4834 | row++; |
4835 | } | |
4836 | /* Otherwise move it back in range. */ | |
4837 | else | |
868e640e | 4838 | col = FRAME_CURSOR_X_LIMIT (f) - 1; |
648fa17d JB |
4839 | } |
4840 | } | |
4841 | ||
385ed61f | 4842 | cursor_to (f, row, col); |
1113d9db | 4843 | } |
4588ec20 | 4844 | else |
5f5c8ee5 GM |
4845 | { |
4846 | /* We have only one cursor on terminal frames. Use it to | |
4847 | display the cursor of the selected window. */ | |
4848 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
a871441d GM |
4849 | if (w->cursor.vpos >= 0 |
4850 | /* The cursor vpos may be temporarily out of bounds | |
4851 | in the following situation: There is one window, | |
4852 | with the cursor in the lower half of it. The window | |
4853 | is split, and a message causes a redisplay before | |
4854 | a new cursor position has been computed. */ | |
7df02016 | 4855 | && w->cursor.vpos < WINDOW_TOTAL_LINES (w)) |
5f5c8ee5 GM |
4856 | { |
4857 | int x = WINDOW_TO_FRAME_HPOS (w, w->cursor.hpos); | |
4858 | int y = WINDOW_TO_FRAME_VPOS (w, w->cursor.vpos); | |
4859 | ||
7df02016 KS |
4860 | if (INTEGERP (w->left_margin_cols)) |
4861 | x += XFASTINT (w->left_margin_cols); | |
177c0ea7 | 4862 | |
7df02016 | 4863 | /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */ |
385ed61f | 4864 | cursor_to (f, y, x); |
5f5c8ee5 GM |
4865 | } |
4866 | } | |
4588ec20 JB |
4867 | } |
4868 | ||
ef1b0ba7 | 4869 | #if !PERIODIC_PREEMPTION_CHECKING |
4588ec20 | 4870 | do_pause: |
ef1b0ba7 | 4871 | #endif |
4588ec20 | 4872 | |
5f5c8ee5 | 4873 | clear_desired_matrices (f); |
27786b2f | 4874 | return pause_p; |
4588ec20 JB |
4875 | } |
4876 | ||
4588ec20 | 4877 | |
5f5c8ee5 | 4878 | /* Do line insertions/deletions on frame F for frame-based redisplay. */ |
4588ec20 | 4879 | |
5bf46f05 | 4880 | static int |
971de7fb | 4881 | scrolling (struct frame *frame) |
4588ec20 JB |
4882 | { |
4883 | int unchanged_at_top, unchanged_at_bottom; | |
4884 | int window_size; | |
4885 | int changed_lines; | |
7df02016 KS |
4886 | int *old_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); |
4887 | int *new_hash = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4888 | int *draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4889 | int *old_draw_cost = (int *) alloca (FRAME_LINES (frame) * sizeof (int)); | |
4588ec20 | 4890 | register int i; |
7df02016 | 4891 | int free_at_end_vpos = FRAME_LINES (frame); |
5f5c8ee5 GM |
4892 | struct glyph_matrix *current_matrix = frame->current_matrix; |
4893 | struct glyph_matrix *desired_matrix = frame->desired_matrix; | |
4588ec20 | 4894 | |
5f5c8ee5 GM |
4895 | if (!current_matrix) |
4896 | abort (); | |
4588ec20 | 4897 | |
5f5c8ee5 GM |
4898 | /* Compute hash codes of all the lines. Also calculate number of |
4899 | changed lines, number of unchanged lines at the beginning, and | |
4900 | number of unchanged lines at the end. */ | |
4588ec20 JB |
4901 | changed_lines = 0; |
4902 | unchanged_at_top = 0; | |
7df02016 KS |
4903 | unchanged_at_bottom = FRAME_LINES (frame); |
4904 | for (i = 0; i < FRAME_LINES (frame); i++) | |
4588ec20 JB |
4905 | { |
4906 | /* Give up on this scrolling if some old lines are not enabled. */ | |
5f5c8ee5 | 4907 | if (!MATRIX_ROW_ENABLED_P (current_matrix, i)) |
4588ec20 | 4908 | return 0; |
5f5c8ee5 GM |
4909 | old_hash[i] = line_hash_code (MATRIX_ROW (current_matrix, i)); |
4910 | if (! MATRIX_ROW_ENABLED_P (desired_matrix, i)) | |
f188b3c4 RS |
4911 | { |
4912 | /* This line cannot be redrawn, so don't let scrolling mess it. */ | |
4913 | new_hash[i] = old_hash[i]; | |
4914 | #define INFINITY 1000000 /* Taken from scroll.c */ | |
4915 | draw_cost[i] = INFINITY; | |
4916 | } | |
4588ec20 | 4917 | else |
f188b3c4 | 4918 | { |
5f5c8ee5 GM |
4919 | new_hash[i] = line_hash_code (MATRIX_ROW (desired_matrix, i)); |
4920 | draw_cost[i] = line_draw_cost (desired_matrix, i); | |
f188b3c4 | 4921 | } |
4588ec20 JB |
4922 | |
4923 | if (old_hash[i] != new_hash[i]) | |
4924 | { | |
4925 | changed_lines++; | |
7df02016 | 4926 | unchanged_at_bottom = FRAME_LINES (frame) - i - 1; |
4588ec20 JB |
4927 | } |
4928 | else if (i == unchanged_at_top) | |
4929 | unchanged_at_top++; | |
5f5c8ee5 | 4930 | old_draw_cost[i] = line_draw_cost (current_matrix, i); |
4588ec20 JB |
4931 | } |
4932 | ||
4933 | /* If changed lines are few, don't allow preemption, don't scroll. */ | |
daf01701 | 4934 | if ((!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4935 | && changed_lines < baud_rate / 2400) |
7df02016 | 4936 | || unchanged_at_bottom == FRAME_LINES (frame)) |
4588ec20 JB |
4937 | return 1; |
4938 | ||
7df02016 | 4939 | window_size = (FRAME_LINES (frame) - unchanged_at_top |
4588ec20 JB |
4940 | - unchanged_at_bottom); |
4941 | ||
daf01701 | 4942 | if (FRAME_SCROLL_REGION_OK (frame)) |
4588ec20 | 4943 | free_at_end_vpos -= unchanged_at_bottom; |
daf01701 | 4944 | else if (FRAME_MEMORY_BELOW_FRAME (frame)) |
4588ec20 JB |
4945 | free_at_end_vpos = -1; |
4946 | ||
4947 | /* If large window, fast terminal and few lines in common between | |
5f5c8ee5 | 4948 | current frame and desired frame, don't bother with i/d calc. */ |
daf01701 | 4949 | if (!FRAME_SCROLL_REGION_OK (frame) |
8a56675d | 4950 | && window_size >= 18 && baud_rate > 2400 |
4588ec20 JB |
4951 | && (window_size >= |
4952 | 10 * scrolling_max_lines_saved (unchanged_at_top, | |
7df02016 | 4953 | FRAME_LINES (frame) - unchanged_at_bottom, |
4588ec20 JB |
4954 | old_hash, new_hash, draw_cost))) |
4955 | return 0; | |
4956 | ||
5f5c8ee5 GM |
4957 | if (window_size < 2) |
4958 | return 0; | |
4959 | ||
502b9b64 | 4960 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
4588ec20 | 4961 | draw_cost + unchanged_at_top - 1, |
190bb91a | 4962 | old_draw_cost + unchanged_at_top - 1, |
4588ec20 JB |
4963 | old_hash + unchanged_at_top - 1, |
4964 | new_hash + unchanged_at_top - 1, | |
4965 | free_at_end_vpos - unchanged_at_top); | |
4966 | ||
4967 | return 0; | |
4968 | } | |
4588ec20 | 4969 | |
4588ec20 | 4970 | |
5f5c8ee5 GM |
4971 | /* Count the number of blanks at the start of the vector of glyphs R |
4972 | which is LEN glyphs long. */ | |
4588ec20 | 4973 | |
4588ec20 | 4974 | static int |
971de7fb | 4975 | count_blanks (struct glyph *r, int len) |
4588ec20 | 4976 | { |
5f5c8ee5 | 4977 | int i; |
177c0ea7 | 4978 | |
5f5c8ee5 GM |
4979 | for (i = 0; i < len; ++i) |
4980 | if (!CHAR_GLYPH_SPACE_P (r[i])) | |
4981 | break; | |
4982 | ||
4983 | return i; | |
4588ec20 JB |
4984 | } |
4985 | ||
5f5c8ee5 GM |
4986 | |
4987 | /* Count the number of glyphs in common at the start of the glyph | |
4988 | vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end | |
4989 | of STR2. Value is the number of equal glyphs equal at the start. */ | |
4990 | ||
4588ec20 | 4991 | static int |
971de7fb | 4992 | count_match (struct glyph *str1, struct glyph *end1, struct glyph *str2, struct glyph *end2) |
4588ec20 | 4993 | { |
5f5c8ee5 GM |
4994 | struct glyph *p1 = str1; |
4995 | struct glyph *p2 = str2; | |
177c0ea7 | 4996 | |
5f5c8ee5 GM |
4997 | while (p1 < end1 |
4998 | && p2 < end2 | |
42186983 | 4999 | && GLYPH_CHAR_AND_FACE_EQUAL_P (p1, p2)) |
5f5c8ee5 | 5000 | ++p1, ++p2; |
177c0ea7 | 5001 | |
5f5c8ee5 | 5002 | return p1 - str1; |
4588ec20 JB |
5003 | } |
5004 | ||
5f5c8ee5 | 5005 | |
4588ec20 | 5006 | /* Char insertion/deletion cost vector, from term.c */ |
4588ec20 | 5007 | |
5e617bc2 | 5008 | #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))]) |
4588ec20 | 5009 | |
5f5c8ee5 GM |
5010 | |
5011 | /* Perform a frame-based update on line VPOS in frame FRAME. */ | |
5012 | ||
4588ec20 | 5013 | static void |
971de7fb | 5014 | update_frame_line (struct frame *f, int vpos) |
4588ec20 | 5015 | { |
5f5c8ee5 | 5016 | struct glyph *obody, *nbody, *op1, *op2, *np1, *nend; |
4588ec20 JB |
5017 | int tem; |
5018 | int osp, nsp, begmatch, endmatch, olen, nlen; | |
c363a1d6 GM |
5019 | struct glyph_matrix *current_matrix = f->current_matrix; |
5020 | struct glyph_matrix *desired_matrix = f->desired_matrix; | |
5f5c8ee5 GM |
5021 | struct glyph_row *current_row = MATRIX_ROW (current_matrix, vpos); |
5022 | struct glyph_row *desired_row = MATRIX_ROW (desired_matrix, vpos); | |
5023 | int must_write_whole_line_p; | |
daf01701 | 5024 | int write_spaces_p = FRAME_MUST_WRITE_SPACES (f); |
c363a1d6 | 5025 | int colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background |
0a894bad GM |
5026 | != FACE_TTY_DEFAULT_BG_COLOR); |
5027 | ||
5028 | if (colored_spaces_p) | |
5029 | write_spaces_p = 1; | |
5f5c8ee5 | 5030 | |
26c63686 GM |
5031 | /* Current row not enabled means it has unknown contents. We must |
5032 | write the whole desired line in that case. */ | |
5f5c8ee5 GM |
5033 | must_write_whole_line_p = !current_row->enabled_p; |
5034 | if (must_write_whole_line_p) | |
4588ec20 | 5035 | { |
5f5c8ee5 | 5036 | obody = 0; |
4588ec20 JB |
5037 | olen = 0; |
5038 | } | |
5039 | else | |
5040 | { | |
5f5c8ee5 GM |
5041 | obody = MATRIX_ROW_GLYPH_START (current_matrix, vpos); |
5042 | olen = current_row->used[TEXT_AREA]; | |
177c0ea7 | 5043 | |
4cecaab8 MB |
5044 | /* Ignore trailing spaces, if we can. */ |
5045 | if (!write_spaces_p) | |
5046 | while (olen > 0 && CHAR_GLYPH_SPACE_P (obody[olen-1])) | |
5047 | olen--; | |
4588ec20 JB |
5048 | } |
5049 | ||
5f5c8ee5 GM |
5050 | current_row->enabled_p = 1; |
5051 | current_row->used[TEXT_AREA] = desired_row->used[TEXT_AREA]; | |
4588ec20 | 5052 | |
5f5c8ee5 GM |
5053 | /* If desired line is empty, just clear the line. */ |
5054 | if (!desired_row->enabled_p) | |
4588ec20 JB |
5055 | { |
5056 | nlen = 0; | |
5057 | goto just_erase; | |
5058 | } | |
5059 | ||
5f5c8ee5 GM |
5060 | nbody = desired_row->glyphs[TEXT_AREA]; |
5061 | nlen = desired_row->used[TEXT_AREA]; | |
5062 | nend = nbody + nlen; | |
5063 | ||
5064 | /* If display line has unknown contents, write the whole line. */ | |
5065 | if (must_write_whole_line_p) | |
5066 | { | |
26c63686 | 5067 | /* Ignore spaces at the end, if we can. */ |
0a894bad | 5068 | if (!write_spaces_p) |
74ca462f GM |
5069 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) |
5070 | --nlen; | |
5071 | ||
26c63686 | 5072 | /* Write the contents of the desired line. */ |
74ca462f | 5073 | if (nlen) |
26c63686 | 5074 | { |
385ed61f KL |
5075 | cursor_to (f, vpos, 0); |
5076 | write_glyphs (f, nbody, nlen); | |
26c63686 | 5077 | } |
177c0ea7 | 5078 | |
26c63686 GM |
5079 | /* Don't call clear_end_of_line if we already wrote the whole |
5080 | line. The cursor will not be at the right margin in that | |
5081 | case but in the line below. */ | |
7df02016 | 5082 | if (nlen < FRAME_TOTAL_COLS (f)) |
26c63686 | 5083 | { |
385ed61f KL |
5084 | cursor_to (f, vpos, nlen); |
5085 | clear_end_of_line (f, FRAME_TOTAL_COLS (f)); | |
26c63686 | 5086 | } |
58827478 GM |
5087 | else |
5088 | /* Make sure we are in the right row, otherwise cursor movement | |
5089 | with cmgoto might use `ch' in the wrong row. */ | |
385ed61f | 5090 | cursor_to (f, vpos, 0); |
177c0ea7 | 5091 | |
5f5c8ee5 GM |
5092 | make_current (desired_matrix, current_matrix, vpos); |
5093 | return; | |
5094 | } | |
4588ec20 JB |
5095 | |
5096 | /* Pretend trailing spaces are not there at all, | |
5097 | unless for one reason or another we must write all spaces. */ | |
4cecaab8 MB |
5098 | if (!write_spaces_p) |
5099 | while (nlen > 0 && CHAR_GLYPH_SPACE_P (nbody[nlen - 1])) | |
5100 | nlen--; | |
4588ec20 JB |
5101 | |
5102 | /* If there's no i/d char, quickly do the best we can without it. */ | |
daf01701 | 5103 | if (!FRAME_CHAR_INS_DEL_OK (f)) |
4588ec20 | 5104 | { |
5f5c8ee5 | 5105 | int i, j; |
4588ec20 | 5106 | |
5f5c8ee5 GM |
5107 | /* Find the first glyph in desired row that doesn't agree with |
5108 | a glyph in the current row, and write the rest from there on. */ | |
4588ec20 JB |
5109 | for (i = 0; i < nlen; i++) |
5110 | { | |
5f5c8ee5 | 5111 | if (i >= olen || !GLYPH_EQUAL_P (nbody + i, obody + i)) |
4588ec20 | 5112 | { |
5f5c8ee5 GM |
5113 | /* Find the end of the run of different glyphs. */ |
5114 | j = i + 1; | |
5115 | while (j < nlen | |
5116 | && (j >= olen | |
5117 | || !GLYPH_EQUAL_P (nbody + j, obody + j) | |
5118 | || CHAR_GLYPH_PADDING_P (nbody[j]))) | |
5119 | ++j; | |
177c0ea7 JB |
5120 | |
5121 | /* Output this run of non-matching chars. */ | |
385ed61f KL |
5122 | cursor_to (f, vpos, i); |
5123 | write_glyphs (f, nbody + i, j - i); | |
5f5c8ee5 | 5124 | i = j - 1; |
4588ec20 JB |
5125 | |
5126 | /* Now find the next non-match. */ | |
5127 | } | |
5128 | } | |
5129 | ||
5130 | /* Clear the rest of the line, or the non-clear part of it. */ | |
5131 | if (olen > nlen) | |
5132 | { | |
385ed61f KL |
5133 | cursor_to (f, vpos, nlen); |
5134 | clear_end_of_line (f, olen); | |
4588ec20 JB |
5135 | } |
5136 | ||
5f5c8ee5 GM |
5137 | /* Make current row = desired row. */ |
5138 | make_current (desired_matrix, current_matrix, vpos); | |
4588ec20 JB |
5139 | return; |
5140 | } | |
5141 | ||
5f5c8ee5 GM |
5142 | /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete |
5143 | characters in a row. */ | |
5144 | ||
4588ec20 JB |
5145 | if (!olen) |
5146 | { | |
5f5c8ee5 GM |
5147 | /* If current line is blank, skip over initial spaces, if |
5148 | possible, and write the rest. */ | |
4cecaab8 | 5149 | if (write_spaces_p) |
5f5c8ee5 GM |
5150 | nsp = 0; |
5151 | else | |
5152 | nsp = count_blanks (nbody, nlen); | |
5153 | ||
4588ec20 JB |
5154 | if (nlen > nsp) |
5155 | { | |
385ed61f KL |
5156 | cursor_to (f, vpos, nsp); |
5157 | write_glyphs (f, nbody + nsp, nlen - nsp); | |
4588ec20 JB |
5158 | } |
5159 | ||
502b9b64 | 5160 | /* Exchange contents between current_frame and new_frame. */ |
5f5c8ee5 | 5161 | make_current (desired_matrix, current_matrix, vpos); |
4588ec20 JB |
5162 | return; |
5163 | } | |
5164 | ||
4588ec20 | 5165 | /* Compute number of leading blanks in old and new contents. */ |
5f5c8ee5 | 5166 | osp = count_blanks (obody, olen); |
4cecaab8 | 5167 | nsp = (colored_spaces_p ? 0 : count_blanks (nbody, nlen)); |
4588ec20 | 5168 | |
5f5c8ee5 GM |
5169 | /* Compute number of matching chars starting with first non-blank. */ |
5170 | begmatch = count_match (obody + osp, obody + olen, | |
5171 | nbody + nsp, nbody + nlen); | |
4588ec20 JB |
5172 | |
5173 | /* Spaces in new match implicit space past the end of old. */ | |
5174 | /* A bug causing this to be a no-op was fixed in 18.29. */ | |
0a894bad | 5175 | if (!write_spaces_p && osp + begmatch == olen) |
4588ec20 JB |
5176 | { |
5177 | np1 = nbody + nsp; | |
5f5c8ee5 GM |
5178 | while (np1 + begmatch < nend && CHAR_GLYPH_SPACE_P (np1[begmatch])) |
5179 | ++begmatch; | |
4588ec20 JB |
5180 | } |
5181 | ||
5182 | /* Avoid doing insert/delete char | |
5183 | just cause number of leading spaces differs | |
5f5c8ee5 | 5184 | when the following text does not match. */ |
4588ec20 JB |
5185 | if (begmatch == 0 && osp != nsp) |
5186 | osp = nsp = min (osp, nsp); | |
5187 | ||
5188 | /* Find matching characters at end of line */ | |
5189 | op1 = obody + olen; | |
5190 | np1 = nbody + nlen; | |
5191 | op2 = op1 + begmatch - min (olen - osp, nlen - nsp); | |
5f5c8ee5 GM |
5192 | while (op1 > op2 |
5193 | && GLYPH_EQUAL_P (op1 - 1, np1 - 1)) | |
4588ec20 JB |
5194 | { |
5195 | op1--; | |
5196 | np1--; | |
5197 | } | |
5198 | endmatch = obody + olen - op1; | |
5199 | ||
4588ec20 JB |
5200 | /* tem gets the distance to insert or delete. |
5201 | endmatch is how many characters we save by doing so. | |
5202 | Is it worth it? */ | |
5203 | ||
5204 | tem = (nlen - nsp) - (olen - osp); | |
5205 | if (endmatch && tem | |
daf01701 | 5206 | && (!FRAME_CHAR_INS_DEL_OK (f) |
8a56675d | 5207 | || endmatch <= char_ins_del_cost (f)[tem])) |
4588ec20 JB |
5208 | endmatch = 0; |
5209 | ||
5210 | /* nsp - osp is the distance to insert or delete. | |
5211 | If that is nonzero, begmatch is known to be nonzero also. | |
5212 | begmatch + endmatch is how much we save by doing the ins/del. | |
5213 | Is it worth it? */ | |
5214 | ||
5215 | if (nsp != osp | |
daf01701 | 5216 | && (!FRAME_CHAR_INS_DEL_OK (f) |
c363a1d6 | 5217 | || begmatch + endmatch <= char_ins_del_cost (f)[nsp - osp])) |
4588ec20 JB |
5218 | { |
5219 | begmatch = 0; | |
5220 | endmatch = 0; | |
5221 | osp = nsp = min (osp, nsp); | |
5222 | } | |
5223 | ||
5224 | /* Now go through the line, inserting, writing and | |
5225 | deleting as appropriate. */ | |
5226 | ||
5227 | if (osp > nsp) | |
5228 | { | |
385ed61f KL |
5229 | cursor_to (f, vpos, nsp); |
5230 | delete_glyphs (f, osp - nsp); | |
4588ec20 JB |
5231 | } |
5232 | else if (nsp > osp) | |
5233 | { | |
5234 | /* If going to delete chars later in line | |
5235 | and insert earlier in the line, | |
5236 | must delete first to avoid losing data in the insert */ | |
5237 | if (endmatch && nlen < olen + nsp - osp) | |
5238 | { | |
385ed61f KL |
5239 | cursor_to (f, vpos, nlen - endmatch + osp - nsp); |
5240 | delete_glyphs (f, olen + nsp - osp - nlen); | |
4588ec20 JB |
5241 | olen = nlen - (nsp - osp); |
5242 | } | |
385ed61f KL |
5243 | cursor_to (f, vpos, osp); |
5244 | insert_glyphs (f, 0, nsp - osp); | |
4588ec20 JB |
5245 | } |
5246 | olen += nsp - osp; | |
5247 | ||
5248 | tem = nsp + begmatch + endmatch; | |
5249 | if (nlen != tem || olen != tem) | |
5250 | { | |
4588ec20 JB |
5251 | if (!endmatch || nlen == olen) |
5252 | { | |
c363a1d6 GM |
5253 | /* If new text being written reaches right margin, there is |
5254 | no need to do clear-to-eol at the end of this function | |
5255 | (and it would not be safe, since cursor is not going to | |
5256 | be "at the margin" after the text is done). */ | |
7df02016 | 5257 | if (nlen == FRAME_TOTAL_COLS (f)) |
4588ec20 | 5258 | olen = 0; |
c363a1d6 GM |
5259 | |
5260 | /* Function write_glyphs is prepared to do nothing | |
5261 | if passed a length <= 0. Check it here to avoid | |
5262 | unnecessary cursor movement. */ | |
5263 | if (nlen - tem > 0) | |
5264 | { | |
385ed61f KL |
5265 | cursor_to (f, vpos, nsp + begmatch); |
5266 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
c363a1d6 | 5267 | } |
4588ec20 JB |
5268 | } |
5269 | else if (nlen > olen) | |
5270 | { | |
24e86043 KH |
5271 | /* Here, we used to have the following simple code: |
5272 | ---------------------------------------- | |
5273 | write_glyphs (nbody + nsp + begmatch, olen - tem); | |
5274 | insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen); | |
5275 | ---------------------------------------- | |
5276 | but it doesn't work if nbody[nsp + begmatch + olen - tem] | |
5277 | is a padding glyph. */ | |
5278 | int out = olen - tem; /* Columns to be overwritten originally. */ | |
5279 | int del; | |
5f5c8ee5 | 5280 | |
385ed61f | 5281 | cursor_to (f, vpos, nsp + begmatch); |
177c0ea7 | 5282 | |
5f5c8ee5 | 5283 | /* Calculate columns we can actually overwrite. */ |
c363a1d6 GM |
5284 | while (CHAR_GLYPH_PADDING_P (nbody[nsp + begmatch + out])) |
5285 | out--; | |
385ed61f | 5286 | write_glyphs (f, nbody + nsp + begmatch, out); |
177c0ea7 | 5287 | |
5f5c8ee5 GM |
5288 | /* If we left columns to be overwritten, we must delete them. */ |
5289 | del = olen - tem - out; | |
c363a1d6 | 5290 | if (del > 0) |
385ed61f | 5291 | delete_glyphs (f, del); |
177c0ea7 | 5292 | |
5f5c8ee5 | 5293 | /* At last, we insert columns not yet written out. */ |
385ed61f | 5294 | insert_glyphs (f, nbody + nsp + begmatch + out, nlen - olen + del); |
5f5c8ee5 GM |
5295 | olen = nlen; |
5296 | } | |
5297 | else if (olen > nlen) | |
5298 | { | |
385ed61f KL |
5299 | cursor_to (f, vpos, nsp + begmatch); |
5300 | write_glyphs (f, nbody + nsp + begmatch, nlen - tem); | |
5301 | delete_glyphs (f, olen - nlen); | |
5f5c8ee5 GM |
5302 | olen = nlen; |
5303 | } | |
bd9e3e75 | 5304 | } |
5f5c8ee5 GM |
5305 | |
5306 | just_erase: | |
5307 | /* If any unerased characters remain after the new line, erase them. */ | |
5308 | if (olen > nlen) | |
078b3696 | 5309 | { |
385ed61f KL |
5310 | cursor_to (f, vpos, nlen); |
5311 | clear_end_of_line (f, olen); | |
078b3696 | 5312 | } |
5f5c8ee5 GM |
5313 | |
5314 | /* Exchange contents between current_frame and new_frame. */ | |
5315 | make_current (desired_matrix, current_matrix, vpos); | |
078b3696 | 5316 | } |
5f5c8ee5 GM |
5317 | |
5318 | ||
078b3696 | 5319 | \f |
5f5c8ee5 GM |
5320 | /*********************************************************************** |
5321 | X/Y Position -> Buffer Position | |
5322 | ***********************************************************************/ | |
5323 | ||
a1b0a6db | 5324 | /* Determine what's under window-relative pixel position (*X, *Y). |
2396cbba | 5325 | Return the OBJECT (string or buffer) that's there. |
6b61353c | 5326 | Return in *POS the position in that object. |
2396cbba EZ |
5327 | Adjust *X and *Y to character positions. |
5328 | Return in *DX and *DY the pixel coordinates of the click, | |
5329 | relative to the top left corner of OBJECT, or relative to | |
5330 | the top left corner of the character glyph at (*X, *Y) | |
5331 | if OBJECT is nil. | |
5332 | Return WIDTH and HEIGHT of the object at (*X, *Y), or zero | |
5333 | if the coordinates point to an empty area of the display. */ | |
5f5c8ee5 | 5334 | |
6b61353c | 5335 | Lisp_Object |
971de7fb | 5336 | 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 | 5337 | { |
5f5c8ee5 | 5338 | struct it it; |
707ea971 | 5339 | Lisp_Object old_current_buffer = Fcurrent_buffer (); |
5f5c8ee5 | 5340 | struct text_pos startp; |
6b61353c KH |
5341 | Lisp_Object string; |
5342 | struct glyph_row *row; | |
cedd7cd9 KS |
5343 | #ifdef HAVE_WINDOW_SYSTEM |
5344 | struct image *img = 0; | |
5345 | #endif | |
2396cbba | 5346 | int x0, x1, to_x; |
57b3e30b | 5347 | void *itdata = NULL; |
5f5c8ee5 | 5348 | |
707ea971 CY |
5349 | /* We used to set current_buffer directly here, but that does the |
5350 | wrong thing with `face-remapping-alist' (bug#2044). */ | |
5351 | Fset_buffer (w->buffer); | |
57b3e30b | 5352 | itdata = bidi_shelve_cache (); |
5f5c8ee5 GM |
5353 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
5354 | CHARPOS (startp) = min (ZV, max (BEGV, CHARPOS (startp))); | |
5355 | BYTEPOS (startp) = min (ZV_BYTE, max (BEGV_BYTE, BYTEPOS (startp))); | |
5356 | start_display (&it, w, startp); | |
352ec8ff EZ |
5357 | /* start_display takes into account the header-line row, but IT's |
5358 | vpos still counts from the glyph row that includes the window's | |
5359 | start position. Adjust for a possible header-line row. */ | |
5360 | it.vpos += WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; | |
177c0ea7 | 5361 | |
9173a8fb | 5362 | x0 = *x; |
2396cbba EZ |
5363 | |
5364 | /* First, move to the beginning of the row corresponding to *Y. We | |
5365 | need to be in that row to get the correct value of base paragraph | |
40629f17 | 5366 | direction for the text at (*X, *Y). */ |
2396cbba EZ |
5367 | move_it_to (&it, -1, 0, *y, -1, MOVE_TO_X | MOVE_TO_Y); |
5368 | ||
5369 | /* TO_X is the pixel position that the iterator will compute for the | |
40629f17 EZ |
5370 | glyph at *X. We add it.first_visible_x because iterator |
5371 | positions include the hscroll. */ | |
2396cbba EZ |
5372 | to_x = x0 + it.first_visible_x; |
5373 | if (it.bidi_it.paragraph_dir == R2L) | |
5374 | /* For lines in an R2L paragraph, we need to mirror TO_X wrt the | |
5375 | text area. This is because the iterator, even in R2L | |
5376 | paragraphs, delivers glyphs as if they started at the left | |
5377 | margin of the window. (When we actually produce glyphs for | |
5378 | display, we reverse their order in PRODUCE_GLYPHS, but the | |
5379 | iterator doesn't know about that.) The following line adjusts | |
5380 | the pixel position to the iterator geometry, which is what | |
40629f17 EZ |
5381 | move_it_* routines use. (The -1 is because in a window whose |
5382 | text-area width is W, the rightmost pixel position is W-1, and | |
5383 | it should be mirrored into zero pixel position.) */ | |
5384 | to_x = window_box_width (w, TEXT_AREA) - to_x - 1; | |
5385 | ||
5386 | /* Now move horizontally in the row to the glyph under *X. Second | |
5387 | argument is ZV to prevent move_it_in_display_line from matching | |
5388 | based on buffer positions. */ | |
2396cbba | 5389 | move_it_in_display_line (&it, ZV, to_x, MOVE_TO_X); |
35928349 | 5390 | bidi_unshelve_cache (itdata, 0); |
177c0ea7 | 5391 | |
707ea971 | 5392 | Fset_buffer (old_current_buffer); |
a1b0a6db | 5393 | |
6b61353c KH |
5394 | *dx = x0 + it.first_visible_x - it.current_x; |
5395 | *dy = *y - it.current_y; | |
5396 | ||
5397 | string = w->buffer; | |
5398 | if (STRINGP (it.string)) | |
5399 | string = it.string; | |
a1b0a6db | 5400 | *pos = it.current; |
86282aab KH |
5401 | if (it.what == IT_COMPOSITION |
5402 | && it.cmp_it.nchars > 1 | |
5403 | && it.cmp_it.reversed_p) | |
5404 | { | |
5405 | /* The current display element is a grapheme cluster in a | |
5406 | composition. In that case, we need the position of the first | |
5407 | character of the cluster. But, as it.cmp_it.reversed_p is 1, | |
5408 | it.current points to the last character of the cluster, thus | |
5409 | we must move back to the first character of the same | |
5410 | cluster. */ | |
5411 | CHARPOS (pos->pos) -= it.cmp_it.nchars - 1; | |
5412 | if (STRINGP (it.string)) | |
5413 | BYTEPOS (pos->pos) = string_char_to_byte (string, CHARPOS (pos->pos)); | |
5414 | else | |
425cc014 EZ |
5415 | BYTEPOS (pos->pos) = buf_charpos_to_bytepos (XBUFFER (w->buffer), |
5416 | CHARPOS (pos->pos)); | |
86282aab | 5417 | } |
6b61353c KH |
5418 | |
5419 | #ifdef HAVE_WINDOW_SYSTEM | |
5420 | if (it.what == IT_IMAGE) | |
5421 | { | |
6b61353c KH |
5422 | if ((img = IMAGE_FROM_ID (it.f, it.image_id)) != NULL |
5423 | && !NILP (img->spec)) | |
5424 | *object = img->spec; | |
5425 | } | |
5426 | #endif | |
5427 | ||
b70d98e1 KS |
5428 | if (it.vpos < w->current_matrix->nrows |
5429 | && (row = MATRIX_ROW (w->current_matrix, it.vpos), | |
5430 | row->enabled_p)) | |
6b61353c KH |
5431 | { |
5432 | if (it.hpos < row->used[TEXT_AREA]) | |
5433 | { | |
5434 | struct glyph *glyph = row->glyphs[TEXT_AREA] + it.hpos; | |
6b61353c | 5435 | #ifdef HAVE_WINDOW_SYSTEM |
cedd7cd9 KS |
5436 | if (img) |
5437 | { | |
5438 | *dy -= row->ascent - glyph->ascent; | |
4be9765d KH |
5439 | *dx += glyph->slice.img.x; |
5440 | *dy += glyph->slice.img.y; | |
cedd7cd9 KS |
5441 | /* Image slices positions are still relative to the entire image */ |
5442 | *width = img->width; | |
5443 | *height = img->height; | |
5444 | } | |
5445 | else | |
6b61353c | 5446 | #endif |
cedd7cd9 KS |
5447 | { |
5448 | *width = glyph->pixel_width; | |
5449 | *height = glyph->ascent + glyph->descent; | |
5450 | } | |
6b61353c KH |
5451 | } |
5452 | else | |
5453 | { | |
5454 | *width = 0; | |
5455 | *height = row->height; | |
5456 | } | |
5457 | } | |
5458 | else | |
5459 | { | |
5460 | *width = *height = 0; | |
5461 | } | |
5462 | ||
5463 | /* Add extra (default width) columns if clicked after EOL. */ | |
5e617bc2 | 5464 | x1 = max (0, it.current_x + it.pixel_width - it.first_visible_x); |
6b61353c KH |
5465 | if (x0 > x1) |
5466 | it.hpos += (x0 - x1) / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5467 | ||
5468 | *x = it.hpos; | |
5469 | *y = it.vpos; | |
5470 | ||
5471 | return string; | |
5f5c8ee5 | 5472 | } |
4588ec20 | 5473 | |
5f5c8ee5 GM |
5474 | |
5475 | /* Value is the string under window-relative coordinates X/Y in the | |
6b61353c KH |
5476 | mode line or header line (PART says which) of window W, or nil if none. |
5477 | *CHARPOS is set to the position in the string returned. */ | |
5f5c8ee5 GM |
5478 | |
5479 | Lisp_Object | |
ace1712c EZ |
5480 | mode_line_string (struct window *w, enum window_part part, |
5481 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5482 | int *dx, int *dy, int *width, int *height) | |
5f5c8ee5 GM |
5483 | { |
5484 | struct glyph_row *row; | |
5485 | struct glyph *glyph, *end; | |
6b61353c | 5486 | int x0, y0; |
5f5c8ee5 GM |
5487 | Lisp_Object string = Qnil; |
5488 | ||
641bdbf3 | 5489 | if (part == ON_MODE_LINE) |
5f5c8ee5 GM |
5490 | row = MATRIX_MODE_LINE_ROW (w->current_matrix); |
5491 | else | |
045dee35 | 5492 | row = MATRIX_HEADER_LINE_ROW (w->current_matrix); |
6b61353c KH |
5493 | y0 = *y - row->y; |
5494 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
5f5c8ee5 GM |
5495 | |
5496 | if (row->mode_line_p && row->enabled_p) | |
4588ec20 | 5497 | { |
5f5c8ee5 GM |
5498 | /* Find the glyph under X. If we find one with a string object, |
5499 | it's the one we were looking for. */ | |
5500 | glyph = row->glyphs[TEXT_AREA]; | |
5501 | end = glyph + row->used[TEXT_AREA]; | |
cfde341f | 5502 | for (x0 = *x; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5503 | x0 -= glyph->pixel_width; |
5504 | *x = glyph - row->glyphs[TEXT_AREA]; | |
5505 | if (glyph < end) | |
5506 | { | |
5507 | string = glyph->object; | |
5508 | *charpos = glyph->charpos; | |
5509 | *width = glyph->pixel_width; | |
5510 | *height = glyph->ascent + glyph->descent; | |
5511 | #ifdef HAVE_WINDOW_SYSTEM | |
5512 | if (glyph->type == IMAGE_GLYPH) | |
5513 | { | |
5514 | struct image *img; | |
5515 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5516 | if (img != NULL) | |
5517 | *object = img->spec; | |
5518 | y0 -= row->ascent - glyph->ascent; | |
5519 | } | |
5520 | #endif | |
5521 | } | |
5522 | else | |
5523 | { | |
5524 | /* Add extra (default width) columns if clicked after EOL. */ | |
5525 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5526 | *width = 0; | |
5527 | *height = row->height; | |
5528 | } | |
5529 | } | |
5530 | else | |
5531 | { | |
5532 | *x = 0; | |
5533 | x0 = 0; | |
5534 | *width = *height = 0; | |
4588ec20 | 5535 | } |
5f5c8ee5 | 5536 | |
6b61353c KH |
5537 | *dx = x0; |
5538 | *dy = y0; | |
5539 | ||
5f5c8ee5 | 5540 | return string; |
4588ec20 | 5541 | } |
5f5c8ee5 GM |
5542 | |
5543 | ||
db1db309 GM |
5544 | /* Value is the string under window-relative coordinates X/Y in either |
5545 | marginal area, or nil if none. *CHARPOS is set to the position in | |
5546 | the string returned. */ | |
5547 | ||
5548 | Lisp_Object | |
ace1712c EZ |
5549 | marginal_area_string (struct window *w, enum window_part part, |
5550 | int *x, int *y, EMACS_INT *charpos, Lisp_Object *object, | |
5551 | int *dx, int *dy, int *width, int *height) | |
db1db309 GM |
5552 | { |
5553 | struct glyph_row *row = w->current_matrix->rows; | |
5554 | struct glyph *glyph, *end; | |
6b61353c | 5555 | int x0, y0, i, wy = *y; |
641bdbf3 | 5556 | int area; |
db1db309 GM |
5557 | Lisp_Object string = Qnil; |
5558 | ||
641bdbf3 | 5559 | if (part == ON_LEFT_MARGIN) |
db1db309 | 5560 | area = LEFT_MARGIN_AREA; |
641bdbf3 | 5561 | else if (part == ON_RIGHT_MARGIN) |
db1db309 GM |
5562 | area = RIGHT_MARGIN_AREA; |
5563 | else | |
5564 | abort (); | |
5565 | ||
5566 | for (i = 0; row->enabled_p && i < w->current_matrix->nrows; ++i, ++row) | |
5567 | if (wy >= row->y && wy < MATRIX_ROW_BOTTOM_Y (row)) | |
5568 | break; | |
6b61353c KH |
5569 | y0 = *y - row->y; |
5570 | *y = row - MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
db1db309 GM |
5571 | |
5572 | if (row->enabled_p) | |
5573 | { | |
5574 | /* Find the glyph under X. If we find one with a string object, | |
5575 | it's the one we were looking for. */ | |
db1db309 | 5576 | if (area == RIGHT_MARGIN_AREA) |
7df02016 | 5577 | x0 = ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5578 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5579 | : WINDOW_TOTAL_FRINGE_WIDTH (w)) |
5580 | + window_box_width (w, LEFT_MARGIN_AREA) | |
5581 | + window_box_width (w, TEXT_AREA)); | |
db1db309 | 5582 | else |
7df02016 | 5583 | x0 = (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w) |
6b61353c | 5584 | ? WINDOW_LEFT_FRINGE_WIDTH (w) |
7df02016 KS |
5585 | : 0); |
5586 | ||
6b61353c KH |
5587 | glyph = row->glyphs[area]; |
5588 | end = glyph + row->used[area]; | |
cfde341f | 5589 | for (x0 = *x - x0; glyph < end && x0 >= glyph->pixel_width; ++glyph) |
6b61353c KH |
5590 | x0 -= glyph->pixel_width; |
5591 | *x = glyph - row->glyphs[area]; | |
5592 | if (glyph < end) | |
5593 | { | |
5594 | string = glyph->object; | |
5595 | *charpos = glyph->charpos; | |
5596 | *width = glyph->pixel_width; | |
5597 | *height = glyph->ascent + glyph->descent; | |
5598 | #ifdef HAVE_WINDOW_SYSTEM | |
5599 | if (glyph->type == IMAGE_GLYPH) | |
5600 | { | |
5601 | struct image *img; | |
5602 | img = IMAGE_FROM_ID (WINDOW_XFRAME (w), glyph->u.img_id); | |
5603 | if (img != NULL) | |
5604 | *object = img->spec; | |
5605 | y0 -= row->ascent - glyph->ascent; | |
4be9765d KH |
5606 | x0 += glyph->slice.img.x; |
5607 | y0 += glyph->slice.img.y; | |
6b61353c KH |
5608 | } |
5609 | #endif | |
5610 | } | |
5611 | else | |
5612 | { | |
5613 | /* Add extra (default width) columns if clicked after EOL. */ | |
5614 | *x += x0 / WINDOW_FRAME_COLUMN_WIDTH (w); | |
5615 | *width = 0; | |
5616 | *height = row->height; | |
5617 | } | |
db1db309 | 5618 | } |
6b61353c KH |
5619 | else |
5620 | { | |
5621 | x0 = 0; | |
5622 | *x = 0; | |
5623 | *width = *height = 0; | |
5624 | } | |
5625 | ||
5626 | *dx = x0; | |
5627 | *dy = y0; | |
db1db309 GM |
5628 | |
5629 | return string; | |
5630 | } | |
5631 | ||
5632 | ||
5f5c8ee5 GM |
5633 | /*********************************************************************** |
5634 | Changing Frame Sizes | |
5635 | ***********************************************************************/ | |
4588ec20 JB |
5636 | |
5637 | #ifdef SIGWINCH | |
5f5c8ee5 | 5638 | |
9af30bdf | 5639 | static void |
971de7fb DN |
5640 | window_change_signal (int signalnum) /* If we don't have an argument, */ |
5641 | /* some compilers complain in signal calls. */ | |
4588ec20 JB |
5642 | { |
5643 | int width, height; | |
4588ec20 JB |
5644 | int old_errno = errno; |
5645 | ||
28d7d09f | 5646 | struct tty_display_info *tty; |
4d553a13 | 5647 | |
333f1b6f JD |
5648 | signal (SIGWINCH, window_change_signal); |
5649 | SIGNAL_THREAD_CHECK (signalnum); | |
5650 | ||
9628b887 KL |
5651 | /* The frame size change obviously applies to a single |
5652 | termcap-controlled terminal, but we can't decide which. | |
5653 | Therefore, we resize the frames corresponding to each tty. | |
9628b887 KL |
5654 | */ |
5655 | for (tty = tty_list; tty; tty = tty->next) { | |
4588ec20 | 5656 | |
0a125897 KL |
5657 | if (! tty->term_initted) |
5658 | continue; | |
4588ec20 | 5659 | |
db878925 DN |
5660 | /* Suspended tty frames have tty->input == NULL avoid trying to |
5661 | use it. */ | |
5662 | if (!tty->input) | |
5663 | continue; | |
5664 | ||
0b0d3e0b | 5665 | get_tty_size (fileno (tty->input), &width, &height); |
3fc809e2 | 5666 | |
bedeffcf | 5667 | if (width > 5 && height > 2) { |
9628b887 | 5668 | Lisp_Object tail, frame; |
3fc809e2 | 5669 | |
9628b887 | 5670 | FOR_EACH_FRAME (tail, frame) |
4d553a13 KL |
5671 | if (FRAME_TERMCAP_P (XFRAME (frame)) && FRAME_TTY (XFRAME (frame)) == tty) |
5672 | /* Record the new sizes, but don't reallocate the data | |
5673 | structures now. Let that be done later outside of the | |
5674 | signal handler. */ | |
5675 | change_frame_size (XFRAME (frame), height, width, 0, 1, 0); | |
9628b887 | 5676 | } |
4588ec20 | 5677 | } |
3fc809e2 | 5678 | |
4588ec20 JB |
5679 | errno = old_errno; |
5680 | } | |
5681 | #endif /* SIGWINCH */ | |
5682 | ||
5683 | ||
b96fd3e8 GM |
5684 | /* Do any change in frame size that was requested by a signal. SAFE |
5685 | non-zero means this function is called from a place where it is | |
5686 | safe to change frame sizes while a redisplay is in progress. */ | |
4588ec20 | 5687 | |
dfcf069d | 5688 | void |
971de7fb | 5689 | do_pending_window_change (int safe) |
4588ec20 JB |
5690 | { |
5691 | /* If window_change_signal should have run before, run it now. */ | |
b96fd3e8 GM |
5692 | if (redisplaying_p && !safe) |
5693 | return; | |
177c0ea7 | 5694 | |
4588ec20 JB |
5695 | while (delayed_size_change) |
5696 | { | |
35f56f96 | 5697 | Lisp_Object tail, frame; |
4588ec20 JB |
5698 | |
5699 | delayed_size_change = 0; | |
5700 | ||
35f56f96 | 5701 | FOR_EACH_FRAME (tail, frame) |
4588ec20 | 5702 | { |
5f5c8ee5 | 5703 | struct frame *f = XFRAME (frame); |
35f56f96 | 5704 | |
7df02016 KS |
5705 | if (f->new_text_lines != 0 || f->new_text_cols != 0) |
5706 | change_frame_size (f, f->new_text_lines, f->new_text_cols, | |
5707 | 0, 0, safe); | |
4588ec20 JB |
5708 | } |
5709 | } | |
5710 | } | |
5711 | ||
5712 | ||
502b9b64 | 5713 | /* Change the frame height and/or width. Values may be given as zero to |
177c0ea7 | 5714 | indicate no change is to take place. |
4588ec20 | 5715 | |
b6a65ac2 JB |
5716 | If DELAY is non-zero, then assume we're being called from a signal |
5717 | handler, and queue the change for later - perhaps the next | |
5718 | redisplay. Since this tries to resize windows, we can't call it | |
b96fd3e8 GM |
5719 | from a signal handler. |
5720 | ||
5721 | SAFE non-zero means this function is called from a place where it's | |
5722 | safe to change frame sizes while a redisplay is in progress. */ | |
b6a65ac2 | 5723 | |
dfcf069d | 5724 | void |
971de7fb | 5725 | change_frame_size (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
45140e01 RS |
5726 | { |
5727 | Lisp_Object tail, frame; | |
3826ea1a | 5728 | |
9628b887 | 5729 | if (FRAME_MSDOS_P (f)) |
45140e01 | 5730 | { |
9628b887 KL |
5731 | /* On MS-DOS, all frames use the same screen, so a change in |
5732 | size affects all frames. Termcap now supports multiple | |
5733 | ttys. */ | |
45140e01 | 5734 | FOR_EACH_FRAME (tail, frame) |
8a376b3b | 5735 | if (! FRAME_WINDOW_P (XFRAME (frame))) |
45140e01 | 5736 | change_frame_size_1 (XFRAME (frame), newheight, newwidth, |
b96fd3e8 | 5737 | pretend, delay, safe); |
45140e01 RS |
5738 | } |
5739 | else | |
b96fd3e8 | 5740 | change_frame_size_1 (f, newheight, newwidth, pretend, delay, safe); |
45140e01 RS |
5741 | } |
5742 | ||
5743 | static void | |
971de7fb | 5744 | change_frame_size_1 (register struct frame *f, int newheight, int newwidth, int pretend, int delay, int safe) |
4588ec20 | 5745 | { |
7df02016 | 5746 | int new_frame_total_cols; |
aed13378 | 5747 | int count = SPECPDL_INDEX (); |
3826ea1a | 5748 | |
4588ec20 | 5749 | /* If we can't deal with the change now, queue it for later. */ |
b96fd3e8 | 5750 | if (delay || (redisplaying_p && !safe)) |
4588ec20 | 5751 | { |
7df02016 KS |
5752 | f->new_text_lines = newheight; |
5753 | f->new_text_cols = newwidth; | |
4588ec20 JB |
5754 | delayed_size_change = 1; |
5755 | return; | |
5756 | } | |
5757 | ||
502b9b64 | 5758 | /* This size-change overrides any pending one for this frame. */ |
7df02016 KS |
5759 | f->new_text_lines = 0; |
5760 | f->new_text_cols = 0; | |
b6a65ac2 | 5761 | |
08f7aa3e | 5762 | /* If an argument is zero, set it to the current value. */ |
ae19c6f2 | 5763 | if (newheight == 0) |
7df02016 | 5764 | newheight = FRAME_LINES (f); |
ae19c6f2 | 5765 | if (newwidth == 0) |
7df02016 | 5766 | newwidth = FRAME_COLS (f); |
3826ea1a | 5767 | |
3b95a6f9 | 5768 | /* Compute width of windows in F. */ |
b6a65ac2 | 5769 | /* Round up to the smallest acceptable size. */ |
5f5c8ee5 | 5770 | check_frame_size (f, &newheight, &newwidth); |
b6a65ac2 | 5771 | |
3b95a6f9 MR |
5772 | /* This is the width of the frame with vertical scroll bars and fringe |
5773 | columns. Do this after rounding - see discussion of bug#9723. */ | |
5774 | new_frame_total_cols = FRAME_TOTAL_COLS_ARG (f, newwidth); | |
5775 | ||
b6a65ac2 | 5776 | /* If we're not changing the frame size, quit now. */ |
3b95a6f9 MR |
5777 | /* Frame width may be unchanged but the text portion may change, for |
5778 | example, fullscreen and remove/add scroll bar. */ | |
7df02016 | 5779 | if (newheight == FRAME_LINES (f) |
3b95a6f9 MR |
5780 | /* Text portion unchanged? */ |
5781 | && newwidth == FRAME_COLS (f) | |
5782 | /* Frame width unchanged? */ | |
5783 | && new_frame_total_cols == FRAME_TOTAL_COLS (f)) | |
4588ec20 JB |
5784 | return; |
5785 | ||
cbb95688 RS |
5786 | BLOCK_INPUT; |
5787 | ||
886a8a6c KH |
5788 | #ifdef MSDOS |
5789 | /* We only can set screen dimensions to certain values supported | |
5790 | by our video hardware. Try to find the smallest size greater | |
5791 | or equal to the requested dimensions. */ | |
5792 | dos_set_window_size (&newheight, &newwidth); | |
5793 | #endif | |
5794 | ||
7df02016 | 5795 | if (newheight != FRAME_LINES (f)) |
4588ec20 | 5796 | { |
562dd5e9 | 5797 | resize_frame_windows (f, newheight, 0); |
b6a65ac2 | 5798 | |
48e482e6 EZ |
5799 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5800 | manipulating video hardware. */ | |
5801 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5802 | FrameRows (FRAME_TTY (f)) = newheight; |
4588ec20 JB |
5803 | } |
5804 | ||
7df02016 | 5805 | if (new_frame_total_cols != FRAME_TOTAL_COLS (f)) |
4588ec20 | 5806 | { |
562dd5e9 | 5807 | resize_frame_windows (f, new_frame_total_cols, 1); |
4588ec20 | 5808 | |
48e482e6 EZ |
5809 | /* MSDOS frames cannot PRETEND, as they change frame size by |
5810 | manipulating video hardware. */ | |
5811 | if ((FRAME_TERMCAP_P (f) && !pretend) || FRAME_MSDOS_P (f)) | |
6548cf00 | 5812 | FrameCols (FRAME_TTY (f)) = newwidth; |
5f5c8ee5 | 5813 | |
9ea173e8 | 5814 | if (WINDOWP (f->tool_bar_window)) |
7df02016 | 5815 | XSETFASTINT (XWINDOW (f->tool_bar_window)->total_cols, newwidth); |
4588ec20 JB |
5816 | } |
5817 | ||
7df02016 KS |
5818 | FRAME_LINES (f) = newheight; |
5819 | SET_FRAME_COLS (f, newwidth); | |
986e61b8 | 5820 | |
5f5c8ee5 GM |
5821 | { |
5822 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
5823 | int text_area_x, text_area_y, text_area_width, text_area_height; | |
177c0ea7 | 5824 | |
5f5c8ee5 GM |
5825 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, &text_area_width, |
5826 | &text_area_height); | |
5827 | if (w->cursor.x >= text_area_x + text_area_width) | |
5828 | w->cursor.hpos = w->cursor.x = 0; | |
5829 | if (w->cursor.y >= text_area_y + text_area_height) | |
5830 | w->cursor.vpos = w->cursor.y = 0; | |
5831 | } | |
986e61b8 | 5832 | |
5f5c8ee5 | 5833 | adjust_glyphs (f); |
5f5c8ee5 | 5834 | calculate_costs (f); |
cb02fa39 GM |
5835 | SET_FRAME_GARBAGED (f); |
5836 | f->resized_p = 1; | |
97cf50e7 RS |
5837 | |
5838 | UNBLOCK_INPUT; | |
61730a69 | 5839 | |
e523f7e5 RS |
5840 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
5841 | ||
ef264c42 | 5842 | run_window_configuration_change_hook (f); |
e523f7e5 RS |
5843 | |
5844 | unbind_to (count, Qnil); | |
4588ec20 | 5845 | } |
5f5c8ee5 GM |
5846 | |
5847 | ||
4588ec20 | 5848 | \f |
5f5c8ee5 GM |
5849 | /*********************************************************************** |
5850 | Terminal Related Lisp Functions | |
5851 | ***********************************************************************/ | |
5852 | ||
5853 | DEFUN ("open-termscript", Fopen_termscript, Sopen_termscript, | |
228299fa | 5854 | 1, 1, "FOpen termscript file: ", |
7ee72033 MB |
5855 | doc: /* Start writing all terminal output to FILE as well as the terminal. |
5856 | FILE = nil means just close any termscript file currently open. */) | |
5842a27b | 5857 | (Lisp_Object file) |
5f5c8ee5 | 5858 | { |
0b0d3e0b KL |
5859 | struct tty_display_info *tty; |
5860 | ||
7d2f1216 EZ |
5861 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ()) |
5862 | && ! FRAME_MSDOS_P (SELECTED_FRAME ())) | |
0b0d3e0b KL |
5863 | error ("Current frame is not on a tty device"); |
5864 | ||
5865 | tty = CURTTY (); | |
5866 | ||
5867 | if (tty->termscript != 0) | |
e18c7093 KL |
5868 | { |
5869 | BLOCK_INPUT; | |
0b0d3e0b | 5870 | fclose (tty->termscript); |
e18c7093 KL |
5871 | UNBLOCK_INPUT; |
5872 | } | |
0b0d3e0b | 5873 | tty->termscript = 0; |
5f5c8ee5 GM |
5874 | |
5875 | if (! NILP (file)) | |
5876 | { | |
5877 | file = Fexpand_file_name (file, Qnil); | |
42a5b22f | 5878 | tty->termscript = fopen (SSDATA (file), "w"); |
0b0d3e0b | 5879 | if (tty->termscript == 0) |
5f5c8ee5 GM |
5880 | report_file_error ("Opening termscript", Fcons (file, Qnil)); |
5881 | } | |
5882 | return Qnil; | |
5883 | } | |
5884 | ||
5885 | ||
4588ec20 | 5886 | DEFUN ("send-string-to-terminal", Fsend_string_to_terminal, |
62af879c | 5887 | Ssend_string_to_terminal, 1, 2, 0, |
7ee72033 | 5888 | doc: /* Send STRING to the terminal without alteration. |
62af879c KL |
5889 | Control characters in STRING will have terminal-dependent effects. |
5890 | ||
6ed8eeff | 5891 | Optional parameter TERMINAL specifies the tty terminal device to use. |
558759e4 AM |
5892 | It may be a terminal object, a frame, or nil for the terminal used by |
5893 | the currently selected frame. In batch mode, STRING is sent to stdout | |
5894 | when TERMINAL is nil. */) | |
5842a27b | 5895 | (Lisp_Object string, Lisp_Object terminal) |
4588ec20 | 5896 | { |
7cef7ce3 SM |
5897 | struct terminal *t = get_terminal (terminal, 1); |
5898 | FILE *out; | |
0b0d3e0b | 5899 | |
94f3db62 | 5900 | /* ??? Perhaps we should do something special for multibyte strings here. */ |
b7826503 | 5901 | CHECK_STRING (string); |
2c1e4409 | 5902 | BLOCK_INPUT; |
0b0d3e0b | 5903 | |
6ed8eeff KL |
5904 | if (!t) |
5905 | error ("Unknown terminal device"); | |
0b0d3e0b | 5906 | |
7cef7ce3 SM |
5907 | if (t->type == output_initial) |
5908 | out = stdout; | |
5909 | else if (t->type != output_termcap && t->type != output_msdos_raw) | |
5910 | error ("Device %d is not a termcap terminal device", t->id); | |
5911 | else | |
5912 | { | |
5913 | struct tty_display_info *tty = t->display_info.tty; | |
3fc809e2 | 5914 | |
7cef7ce3 SM |
5915 | if (! tty->output) |
5916 | error ("Terminal is currently suspended"); | |
cecfdea6 | 5917 | |
7cef7ce3 SM |
5918 | if (tty->termscript) |
5919 | { | |
5920 | fwrite (SDATA (string), 1, SBYTES (string), tty->termscript); | |
5921 | fflush (tty->termscript); | |
5922 | } | |
5923 | out = tty->output; | |
4588ec20 | 5924 | } |
7cef7ce3 SM |
5925 | fwrite (SDATA (string), 1, SBYTES (string), out); |
5926 | fflush (out); | |
2c1e4409 | 5927 | UNBLOCK_INPUT; |
4588ec20 JB |
5928 | return Qnil; |
5929 | } | |
5930 | ||
5f5c8ee5 | 5931 | |
a7ca3326 | 5932 | DEFUN ("ding", Fding, Sding, 0, 1, 0, |
7ee72033 | 5933 | doc: /* Beep, or flash the screen. |
228299fa | 5934 | Also, unless an argument is given, |
7ee72033 | 5935 | terminate any keyboard macro currently executing. */) |
5842a27b | 5936 | (Lisp_Object arg) |
4588ec20 | 5937 | { |
efb859b4 | 5938 | if (!NILP (arg)) |
4588ec20 | 5939 | { |
7fa788da RS |
5940 | if (noninteractive) |
5941 | putchar (07); | |
5942 | else | |
385ed61f | 5943 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5944 | } |
5945 | else | |
5946 | bitch_at_user (); | |
5947 | ||
5948 | return Qnil; | |
5949 | } | |
5950 | ||
dfcf069d | 5951 | void |
971de7fb | 5952 | bitch_at_user (void) |
4588ec20 JB |
5953 | { |
5954 | if (noninteractive) | |
5955 | putchar (07); | |
5f5c8ee5 | 5956 | else if (!INTERACTIVE) /* Stop executing a keyboard macro. */ |
4588ec20 JB |
5957 | error ("Keyboard macro terminated by a command ringing the bell"); |
5958 | else | |
385ed61f | 5959 | ring_bell (XFRAME (selected_frame)); |
4588ec20 JB |
5960 | } |
5961 | ||
5f5c8ee5 GM |
5962 | |
5963 | \f | |
5964 | /*********************************************************************** | |
5965 | Sleeping, Waiting | |
5966 | ***********************************************************************/ | |
5967 | ||
a7ca3326 | 5968 | DEFUN ("sleep-for", Fsleep_for, Ssleep_for, 1, 2, 0, |
7ee72033 | 5969 | doc: /* Pause, without updating display, for SECONDS seconds. |
228299fa GM |
5970 | SECONDS may be a floating-point value, meaning that you can wait for a |
5971 | fraction of a second. Optional second arg MILLISECONDS specifies an | |
5972 | additional wait period, in milliseconds; this may be useful if your | |
5973 | Emacs was built without floating point support. | |
7ee72033 | 5974 | \(Not all operating systems support waiting for a fraction of a second.) */) |
5842a27b | 5975 | (Lisp_Object seconds, Lisp_Object milliseconds) |
4588ec20 | 5976 | { |
767229f8 | 5977 | int sec, usec; |
4588ec20 | 5978 | |
767229f8 | 5979 | if (NILP (milliseconds)) |
e9c9a718 | 5980 | XSETINT (milliseconds, 0); |
767229f8 | 5981 | else |
b7826503 | 5982 | CHECK_NUMBER (milliseconds); |
b07646f5 JB |
5983 | usec = XINT (milliseconds) * 1000; |
5984 | ||
b07646f5 JB |
5985 | { |
5986 | double duration = extract_float (seconds); | |
5987 | sec = (int) duration; | |
5988 | usec += (duration - sec) * 1000000; | |
5989 | } | |
4588ec20 | 5990 | |
a41f8bed | 5991 | #ifndef EMACS_HAS_USECS |
767229f8 | 5992 | if (sec == 0 && usec != 0) |
861e19b9 | 5993 | error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE); |
4588ec20 | 5994 | #endif |
767229f8 JB |
5995 | |
5996 | /* Assure that 0 <= usec < 1000000. */ | |
5997 | if (usec < 0) | |
5998 | { | |
153a073c | 5999 | /* We can't rely on the rounding being correct if usec is negative. */ |
767229f8 JB |
6000 | if (-1000000 < usec) |
6001 | sec--, usec += 1000000; | |
6002 | else | |
6003 | sec -= -usec / 1000000, usec = 1000000 - (-usec % 1000000); | |
4588ec20 | 6004 | } |
767229f8 JB |
6005 | else |
6006 | sec += usec / 1000000, usec %= 1000000; | |
6007 | ||
6b5153b1 | 6008 | if (sec < 0 || (sec == 0 && usec == 0)) |
767229f8 | 6009 | return Qnil; |
4588ec20 | 6010 | |
dcd1ca45 | 6011 | wait_reading_process_output (sec, usec, 0, 0, Qnil, NULL, 0); |
4588ec20 JB |
6012 | |
6013 | return Qnil; | |
6014 | } | |
6015 | ||
5f5c8ee5 | 6016 | |
dcd1ca45 | 6017 | /* This is just like wait_reading_process_output, except that |
902b9b6d | 6018 | it does redisplay. |
f76475ad | 6019 | |
2bcac766 CY |
6020 | TIMEOUT is number of seconds to wait (float or integer), |
6021 | or t to wait forever. | |
902b9b6d KS |
6022 | READING is 1 if reading input. |
6023 | If DO_DISPLAY is >0 display process output while waiting. | |
6024 | If DO_DISPLAY is >1 perform an initial redisplay before waiting. | |
6025 | */ | |
4588ec20 | 6026 | |
f76475ad | 6027 | Lisp_Object |
971de7fb | 6028 | sit_for (Lisp_Object timeout, int reading, int do_display) |
f76475ad | 6029 | { |
902b9b6d | 6030 | int sec, usec; |
f222369e | 6031 | |
902b9b6d | 6032 | swallow_events (do_display); |
ccddf474 | 6033 | |
902b9b6d | 6034 | if ((detect_input_pending_run_timers (do_display)) |
29bcbe54 | 6035 | || !NILP (Vexecuting_kbd_macro)) |
4588ec20 | 6036 | return Qnil; |
4588ec20 | 6037 | |
902b9b6d KS |
6038 | if (do_display >= 2) |
6039 | redisplay_preserve_echo_area (2); | |
6040 | ||
8e09f23f | 6041 | if (INTEGERP (timeout)) |
f222369e | 6042 | { |
7ff14773 | 6043 | sec = XINT (timeout); |
8e09f23f | 6044 | usec = 0; |
f222369e | 6045 | } |
8e09f23f KS |
6046 | else if (FLOATP (timeout)) |
6047 | { | |
99a20368 | 6048 | double seconds = XFLOAT_DATA (timeout); |
902b9b6d KS |
6049 | sec = (int) seconds; |
6050 | usec = (int) ((seconds - sec) * 1000000); | |
6051 | } | |
2bcac766 CY |
6052 | else if (EQ (timeout, Qt)) |
6053 | { | |
6054 | sec = 0; | |
6055 | usec = 0; | |
6056 | } | |
902b9b6d | 6057 | else |
8e09f23f | 6058 | wrong_type_argument (Qnumberp, timeout); |
4588ec20 | 6059 | |
2bcac766 | 6060 | if (sec == 0 && usec == 0 && !EQ (timeout, Qt)) |
dfdb645c JB |
6061 | return Qt; |
6062 | ||
4588ec20 | 6063 | #ifdef SIGIO |
8fc798e9 | 6064 | gobble_input (0); |
f76475ad JB |
6065 | #endif |
6066 | ||
902b9b6d | 6067 | wait_reading_process_output (sec, usec, reading ? -1 : 1, do_display, |
dcd1ca45 | 6068 | Qnil, NULL, 0); |
f76475ad | 6069 | |
4588ec20 JB |
6070 | return detect_input_pending () ? Qnil : Qt; |
6071 | } | |
6072 | ||
5f5c8ee5 | 6073 | |
a7ca3326 | 6074 | DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, |
025de85b CY |
6075 | doc: /* Perform redisplay. |
6076 | Optional arg FORCE, if non-nil, prevents redisplay from being | |
6077 | preempted by arriving input, even if `redisplay-dont-pause' is nil. | |
6078 | If `redisplay-dont-pause' is non-nil (the default), redisplay is never | |
6079 | preempted by arriving input, so FORCE does nothing. | |
6080 | ||
6081 | Return t if redisplay was performed, nil if redisplay was preempted | |
6082 | immediately by pending input. */) | |
5842a27b | 6083 | (Lisp_Object force) |
f76475ad | 6084 | { |
01327edf | 6085 | int count; |
659d9874 | 6086 | |
902b9b6d KS |
6087 | swallow_events (1); |
6088 | if ((detect_input_pending_run_timers (1) | |
01327edf | 6089 | && NILP (force) && !redisplay_dont_pause) |
7ba07a1a CY |
6090 | || !NILP (Vexecuting_kbd_macro)) |
6091 | return Qnil; | |
f76475ad | 6092 | |
01327edf KS |
6093 | count = SPECPDL_INDEX (); |
6094 | if (!NILP (force) && !redisplay_dont_pause) | |
6095 | specbind (Qredisplay_dont_pause, Qt); | |
7ba07a1a | 6096 | redisplay_preserve_echo_area (2); |
01327edf | 6097 | unbind_to (count, Qnil); |
7ba07a1a | 6098 | return Qt; |
f76475ad | 6099 | } |
5f5c8ee5 GM |
6100 | |
6101 | ||
6102 | \f | |
6103 | /*********************************************************************** | |
6104 | Other Lisp Functions | |
6105 | ***********************************************************************/ | |
6106 | ||
6107 | /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the | |
6108 | session's frames, frame names, buffers, buffer-read-only flags, and | |
44edd521 | 6109 | buffer-modified-flags. */ |
5f5c8ee5 GM |
6110 | |
6111 | static Lisp_Object frame_and_buffer_state; | |
6112 | ||
6113 | ||
6114 | DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p, | |
44edd521 | 6115 | Sframe_or_buffer_changed_p, 0, 1, 0, |
bacf09b4 | 6116 | doc: /* Return non-nil if the frame and buffer state appears to have changed. |
44edd521 RS |
6117 | VARIABLE is a variable name whose value is either nil or a state vector |
6118 | that will be updated to contain all frames and buffers, | |
228299fa | 6119 | aside from buffers whose names start with space, |
44edd521 RS |
6120 | along with the buffers' read-only and modified flags. This allows a fast |
6121 | check to see whether buffer menus might need to be recomputed. | |
228299fa | 6122 | If this function returns non-nil, it updates the internal vector to reflect |
44edd521 RS |
6123 | the current state. |
6124 | ||
6125 | If VARIABLE is nil, an internal variable is used. Users should not | |
6126 | pass nil for VARIABLE. */) | |
5842a27b | 6127 | (Lisp_Object variable) |
5f5c8ee5 | 6128 | { |
44edd521 RS |
6129 | Lisp_Object state, tail, frame, buf; |
6130 | Lisp_Object *vecp, *end; | |
5f5c8ee5 GM |
6131 | int n; |
6132 | ||
44edd521 RS |
6133 | if (! NILP (variable)) |
6134 | { | |
6135 | CHECK_SYMBOL (variable); | |
6136 | state = Fsymbol_value (variable); | |
6137 | if (! VECTORP (state)) | |
6138 | goto changed; | |
6139 | } | |
6140 | else | |
6141 | state = frame_and_buffer_state; | |
6142 | ||
6143 | vecp = XVECTOR (state)->contents; | |
77b37c05 | 6144 | end = vecp + ASIZE (state); |
44edd521 | 6145 | |
5f5c8ee5 GM |
6146 | FOR_EACH_FRAME (tail, frame) |
6147 | { | |
44edd521 RS |
6148 | if (vecp == end) |
6149 | goto changed; | |
5f5c8ee5 GM |
6150 | if (!EQ (*vecp++, frame)) |
6151 | goto changed; | |
44edd521 RS |
6152 | if (vecp == end) |
6153 | goto changed; | |
5f5c8ee5 GM |
6154 | if (!EQ (*vecp++, XFRAME (frame)->name)) |
6155 | goto changed; | |
6156 | } | |
44edd521 | 6157 | /* Check that the buffer info matches. */ |
7539e11f | 6158 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6159 | { |
7539e11f | 6160 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6161 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6162 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 | 6163 | continue; |
44edd521 RS |
6164 | if (vecp == end) |
6165 | goto changed; | |
5f5c8ee5 GM |
6166 | if (!EQ (*vecp++, buf)) |
6167 | goto changed; | |
44edd521 RS |
6168 | if (vecp == end) |
6169 | goto changed; | |
4b4deea2 | 6170 | if (!EQ (*vecp++, BVAR (XBUFFER (buf), read_only))) |
5f5c8ee5 | 6171 | goto changed; |
44edd521 RS |
6172 | if (vecp == end) |
6173 | goto changed; | |
5f5c8ee5 GM |
6174 | if (!EQ (*vecp++, Fbuffer_modified_p (buf))) |
6175 | goto changed; | |
6176 | } | |
44edd521 RS |
6177 | if (vecp == end) |
6178 | goto changed; | |
5f5c8ee5 GM |
6179 | /* Detect deletion of a buffer at the end of the list. */ |
6180 | if (EQ (*vecp, Qlambda)) | |
6181 | return Qnil; | |
44edd521 RS |
6182 | |
6183 | /* Come here if we decide the data has changed. */ | |
5f5c8ee5 | 6184 | changed: |
44edd521 RS |
6185 | /* Count the size we will need. |
6186 | Start with 1 so there is room for at least one lambda at the end. */ | |
5f5c8ee5 GM |
6187 | n = 1; |
6188 | FOR_EACH_FRAME (tail, frame) | |
6189 | n += 2; | |
7539e11f | 6190 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6191 | n += 3; |
44edd521 RS |
6192 | /* Reallocate the vector if data has grown to need it, |
6193 | or if it has shrunk a lot. */ | |
6194 | if (! VECTORP (state) | |
77b37c05 PE |
6195 | || n > ASIZE (state) |
6196 | || n + 20 < ASIZE (state) / 2) | |
5f5c8ee5 | 6197 | /* Add 20 extra so we grow it less often. */ |
44edd521 RS |
6198 | { |
6199 | state = Fmake_vector (make_number (n + 20), Qlambda); | |
6200 | if (! NILP (variable)) | |
6201 | Fset (variable, state); | |
6202 | else | |
6203 | frame_and_buffer_state = state; | |
6204 | } | |
6205 | ||
6206 | /* Record the new data in the (possibly reallocated) vector. */ | |
6207 | vecp = XVECTOR (state)->contents; | |
5f5c8ee5 GM |
6208 | FOR_EACH_FRAME (tail, frame) |
6209 | { | |
6210 | *vecp++ = frame; | |
6211 | *vecp++ = XFRAME (frame)->name; | |
6212 | } | |
7539e11f | 6213 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6214 | { |
7539e11f | 6215 | buf = XCDR (XCAR (tail)); |
5f5c8ee5 | 6216 | /* Ignore buffers that aren't included in buffer lists. */ |
4b4deea2 | 6217 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
5f5c8ee5 GM |
6218 | continue; |
6219 | *vecp++ = buf; | |
4b4deea2 | 6220 | *vecp++ = BVAR (XBUFFER (buf), read_only); |
5f5c8ee5 GM |
6221 | *vecp++ = Fbuffer_modified_p (buf); |
6222 | } | |
6223 | /* Fill up the vector with lambdas (always at least one). */ | |
6224 | *vecp++ = Qlambda; | |
44edd521 | 6225 | while (vecp - XVECTOR (state)->contents |
77b37c05 | 6226 | < ASIZE (state)) |
5f5c8ee5 GM |
6227 | *vecp++ = Qlambda; |
6228 | /* Make sure we didn't overflow the vector. */ | |
44edd521 | 6229 | if (vecp - XVECTOR (state)->contents |
77b37c05 | 6230 | > ASIZE (state)) |
5f5c8ee5 GM |
6231 | abort (); |
6232 | return Qt; | |
6233 | } | |
6234 | ||
6235 | ||
4588ec20 | 6236 | \f |
5f5c8ee5 GM |
6237 | /*********************************************************************** |
6238 | Initialization | |
6239 | ***********************************************************************/ | |
6240 | ||
5f5c8ee5 GM |
6241 | /* Initialization done when Emacs fork is started, before doing stty. |
6242 | Determine terminal type and set terminal_driver. Then invoke its | |
6243 | decoding routine to set up variables in the terminal package. */ | |
4588ec20 | 6244 | |
dfcf069d | 6245 | void |
971de7fb | 6246 | init_display (void) |
4588ec20 | 6247 | { |
28d440ab KL |
6248 | char *terminal_type; |
6249 | ||
5f5c8ee5 GM |
6250 | /* Construct the space glyph. */ |
6251 | space_glyph.type = CHAR_GLYPH; | |
3fc809e2 | 6252 | SET_CHAR_GLYPH (space_glyph, ' ', DEFAULT_FACE_ID, 0); |
5f5c8ee5 GM |
6253 | space_glyph.charpos = -1; |
6254 | ||
4588ec20 JB |
6255 | inverse_video = 0; |
6256 | cursor_in_echo_area = 0; | |
6257 | terminal_type = (char *) 0; | |
6258 | ||
1315c181 JB |
6259 | /* Now is the time to initialize this; it's used by init_sys_modes |
6260 | during startup. */ | |
2246281f | 6261 | Vinitial_window_system = Qnil; |
4588ec20 | 6262 | |
4181ad9c KL |
6263 | /* SIGWINCH needs to be handled no matter what display we start |
6264 | with. Otherwise newly opened tty frames will not resize | |
6265 | automatically. */ | |
6266 | #ifdef SIGWINCH | |
6267 | #ifndef CANNOT_DUMP | |
6268 | if (initialized) | |
6269 | #endif /* CANNOT_DUMP */ | |
6270 | signal (SIGWINCH, window_change_signal); | |
6271 | #endif /* SIGWINCH */ | |
4588ec20 | 6272 | |
d6ef42b9 | 6273 | /* If running as a daemon, no need to initialize any frames/terminal. */ |
ff808935 DN |
6274 | if (IS_DAEMON) |
6275 | return; | |
d6ef42b9 | 6276 | |
1315c181 JB |
6277 | /* If the user wants to use a window system, we shouldn't bother |
6278 | initializing the terminal. This is especially important when the | |
6279 | terminal is so dumb that emacs gives up before and doesn't bother | |
6280 | using the window system. | |
4588ec20 | 6281 | |
36bbad1d KH |
6282 | If the DISPLAY environment variable is set and nonempty, |
6283 | try to use X, and die with an error message if that doesn't work. */ | |
4588ec20 JB |
6284 | |
6285 | #ifdef HAVE_X_WINDOWS | |
00d70d57 | 6286 | if (! inhibit_window_system && ! display_arg) |
d460af17 | 6287 | { |
36bbad1d | 6288 | char *display; |
36bbad1d | 6289 | display = getenv ("DISPLAY"); |
36bbad1d | 6290 | display_arg = (display != 0 && *display != 0); |
c1fc674b AS |
6291 | |
6292 | if (display_arg && !x_display_ok (display)) | |
6293 | { | |
6294 | fprintf (stderr, "Display %s unavailable, simulating -nw\n", | |
6295 | display); | |
6296 | inhibit_window_system = 1; | |
6297 | } | |
f040093a | 6298 | } |
d460af17 | 6299 | |
4fcc2638 | 6300 | if (!inhibit_window_system && display_arg) |
4588ec20 | 6301 | { |
111d9af3 | 6302 | Vinitial_window_system = Qx; |
4588ec20 JB |
6303 | #ifdef HAVE_X11 |
6304 | Vwindow_system_version = make_number (11); | |
039e5d71 | 6305 | #endif |
8a2a6032 | 6306 | #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES) |
039e5d71 | 6307 | /* In some versions of ncurses, |
6a428f77 | 6308 | tputs crashes if we have not called tgetent. |
039e5d71 KH |
6309 | So call tgetent. */ |
6310 | { char b[2044]; tgetent (b, "xterm");} | |
4588ec20 | 6311 | #endif |
5f5c8ee5 | 6312 | adjust_frame_glyphs_initially (); |
4588ec20 JB |
6313 | return; |
6314 | } | |
6315 | #endif /* HAVE_X_WINDOWS */ | |
6316 | ||
fd2e066a | 6317 | #ifdef HAVE_NTGUI |
177c0ea7 | 6318 | if (!inhibit_window_system) |
fd2e066a | 6319 | { |
111d9af3 | 6320 | Vinitial_window_system = Qw32; |
fd2e066a | 6321 | Vwindow_system_version = make_number (1); |
5f5c8ee5 | 6322 | adjust_frame_glyphs_initially (); |
fd2e066a GV |
6323 | return; |
6324 | } | |
6325 | #endif /* HAVE_NTGUI */ | |
6326 | ||
edfda783 AR |
6327 | #ifdef HAVE_NS |
6328 | if (!inhibit_window_system | |
6329 | #ifndef CANNOT_DUMP | |
6330 | && initialized | |
6331 | #endif | |
6332 | ) | |
6333 | { | |
111d9af3 | 6334 | Vinitial_window_system = Qns; |
5e617bc2 | 6335 | Vwindow_system_version = make_number (10); |
edfda783 AR |
6336 | adjust_frame_glyphs_initially (); |
6337 | return; | |
6338 | } | |
6339 | #endif | |
6340 | ||
4588ec20 JB |
6341 | /* If no window system has been specified, try to use the terminal. */ |
6342 | if (! isatty (0)) | |
6343 | { | |
1559a86d | 6344 | fatal ("standard input is not a tty"); |
4588ec20 JB |
6345 | exit (1); |
6346 | } | |
6347 | ||
6152361f JR |
6348 | #ifdef WINDOWSNT |
6349 | terminal_type = "w32console"; | |
6350 | #else | |
153a073c | 6351 | /* Look at the TERM variable. */ |
4588ec20 | 6352 | terminal_type = (char *) getenv ("TERM"); |
6152361f | 6353 | #endif |
4588ec20 JB |
6354 | if (!terminal_type) |
6355 | { | |
5d12ff0b | 6356 | #ifdef HAVE_WINDOW_SYSTEM |
b9e590fc RS |
6357 | if (! inhibit_window_system) |
6358 | fprintf (stderr, "Please set the environment variable DISPLAY or TERM (see `tset').\n"); | |
5d12ff0b RS |
6359 | else |
6360 | #endif /* HAVE_WINDOW_SYSTEM */ | |
b9e590fc | 6361 | fprintf (stderr, "Please set the environment variable TERM; see `tset'.\n"); |
4588ec20 JB |
6362 | exit (1); |
6363 | } | |
6364 | ||
0a125897 | 6365 | { |
6ed8eeff | 6366 | struct terminal *t; |
3224dac1 KL |
6367 | struct frame *f = XFRAME (selected_frame); |
6368 | ||
6369 | /* Open a display on the controlling tty. */ | |
6ed8eeff | 6370 | t = init_tty (0, terminal_type, 1); /* Errors are fatal. */ |
3224dac1 KL |
6371 | |
6372 | /* Convert the initial frame to use the new display. */ | |
b04f5ad2 | 6373 | if (f->output_method != output_initial) |
3224dac1 | 6374 | abort (); |
6ed8eeff KL |
6375 | f->output_method = t->type; |
6376 | f->terminal = t; | |
3224dac1 | 6377 | |
6ed8eeff | 6378 | t->reference_count++; |
7ac5dac9 EZ |
6379 | #ifdef MSDOS |
6380 | f->output_data.tty->display_info = &the_only_display_info; | |
6381 | #else | |
6382 | if (f->output_method == output_termcap) | |
6383 | create_tty_output (f); | |
6384 | #endif | |
6ed8eeff | 6385 | t->display_info.tty->top_frame = selected_frame; |
5b65d888 | 6386 | change_frame_size (XFRAME (selected_frame), |
6ed8eeff KL |
6387 | FrameRows (t->display_info.tty), |
6388 | FrameCols (t->display_info.tty), 0, 0, 1); | |
3224dac1 | 6389 | |
6ed8eeff KL |
6390 | /* Delete the initial terminal. */ |
6391 | if (--initial_terminal->reference_count == 0 | |
6392 | && initial_terminal->delete_terminal_hook) | |
6393 | (*initial_terminal->delete_terminal_hook) (initial_terminal); | |
2666355c KL |
6394 | |
6395 | /* Update frame parameters to reflect the new type. */ | |
6396 | Fmodify_frame_parameters | |
6397 | (selected_frame, Fcons (Fcons (Qtty_type, | |
6ed8eeff | 6398 | Ftty_type (selected_frame)), Qnil)); |
657ceaa0 EZ |
6399 | if (t->display_info.tty->name) |
6400 | Fmodify_frame_parameters (selected_frame, | |
6401 | Fcons (Fcons (Qtty, build_string (t->display_info.tty->name)), | |
6402 | Qnil)); | |
6403 | else | |
6404 | Fmodify_frame_parameters (selected_frame, Fcons (Fcons (Qtty, Qnil), | |
6405 | Qnil)); | |
0a125897 | 6406 | } |
3fc809e2 | 6407 | |
d86c299a | 6408 | { |
91fb7e1b | 6409 | struct frame *sf = SELECTED_FRAME (); |
7df02016 KS |
6410 | int width = FRAME_TOTAL_COLS (sf); |
6411 | int height = FRAME_LINES (sf); | |
d86c299a | 6412 | |
5f5c8ee5 | 6413 | /* If these sizes are so big they cause overflow, just ignore the |
dfd153ae PE |
6414 | change. It's not clear what better we could do. The rest of |
6415 | the code assumes that (width + 2) * height * sizeof (struct glyph) | |
6416 | does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */ | |
e3c25c68 PE |
6417 | if (INT_ADD_RANGE_OVERFLOW (width, 2, INT_MIN, INT_MAX) |
6418 | || INT_MULTIPLY_RANGE_OVERFLOW (width + 2, height, INT_MIN, INT_MAX) | |
dfd153ae PE |
6419 | || (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct glyph) |
6420 | < (width + 2) * height)) | |
1559a86d | 6421 | fatal ("screen size %dx%d too big", width, height); |
d86c299a RS |
6422 | } |
6423 | ||
5f5c8ee5 | 6424 | adjust_frame_glyphs_initially (); |
91fb7e1b | 6425 | calculate_costs (XFRAME (selected_frame)); |
4588ec20 | 6426 | |
5f5c8ee5 GM |
6427 | /* Set up faces of the initial terminal frame of a dumped Emacs. */ |
6428 | if (initialized | |
6429 | && !noninteractive | |
2246281f | 6430 | && NILP (Vinitial_window_system)) |
2d764c78 EZ |
6431 | { |
6432 | /* For the initial frame, we don't have any way of knowing what | |
6433 | are the foreground and background colors of the terminal. */ | |
5e617bc2 | 6434 | struct frame *sf = SELECTED_FRAME (); |
2d764c78 | 6435 | |
f9d2fdc4 EZ |
6436 | FRAME_FOREGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_FG_COLOR; |
6437 | FRAME_BACKGROUND_PIXEL (sf) = FACE_TTY_DEFAULT_BG_COLOR; | |
2d764c78 EZ |
6438 | call0 (intern ("tty-set-up-initial-frame-faces")); |
6439 | } | |
5f5c8ee5 GM |
6440 | } |
6441 | ||
6442 | ||
6443 | \f | |
6444 | /*********************************************************************** | |
6445 | Blinking cursor | |
6446 | ***********************************************************************/ | |
6447 | ||
c3f13540 | 6448 | DEFUN ("internal-show-cursor", Finternal_show_cursor, |
5d7791b3 | 6449 | Sinternal_show_cursor, 2, 2, 0, |
7ee72033 | 6450 | doc: /* Set the cursor-visibility flag of WINDOW to SHOW. |
228299fa GM |
6451 | WINDOW nil means use the selected window. SHOW non-nil means |
6452 | show a cursor in WINDOW in the next redisplay. SHOW nil means | |
7ee72033 | 6453 | don't show a cursor. */) |
5842a27b | 6454 | (Lisp_Object window, Lisp_Object show) |
5f5c8ee5 | 6455 | { |
5f5c8ee5 GM |
6456 | /* Don't change cursor state while redisplaying. This could confuse |
6457 | output routines. */ | |
6458 | if (!redisplaying_p) | |
6459 | { | |
6460 | if (NILP (window)) | |
6461 | window = selected_window; | |
6462 | else | |
b7826503 | 6463 | CHECK_WINDOW (window); |
177c0ea7 | 6464 | |
5d7791b3 | 6465 | XWINDOW (window)->cursor_off_p = NILP (show); |
5f5c8ee5 GM |
6466 | } |
6467 | ||
6468 | return Qnil; | |
4588ec20 | 6469 | } |
5f5c8ee5 GM |
6470 | |
6471 | ||
5d7791b3 GM |
6472 | DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p, |
6473 | Sinternal_show_cursor_p, 0, 1, 0, | |
bacf09b4 | 6474 | doc: /* Value is non-nil if next redisplay will display a cursor in WINDOW. |
7ee72033 | 6475 | WINDOW nil or omitted means report on the selected window. */) |
5842a27b | 6476 | (Lisp_Object window) |
5d7791b3 GM |
6477 | { |
6478 | struct window *w; | |
177c0ea7 | 6479 | |
5d7791b3 GM |
6480 | if (NILP (window)) |
6481 | window = selected_window; | |
6482 | else | |
b7826503 | 6483 | CHECK_WINDOW (window); |
177c0ea7 | 6484 | |
5d7791b3 | 6485 | w = XWINDOW (window); |
177c0ea7 | 6486 | return w->cursor_off_p ? Qnil : Qt; |
5d7791b3 GM |
6487 | } |
6488 | ||
87478b52 SM |
6489 | DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame, |
6490 | Slast_nonminibuf_frame, 0, 0, 0, | |
6491 | doc: /* Value is last nonminibuffer frame. */) | |
5842a27b | 6492 | (void) |
87478b52 | 6493 | { |
4958ed94 | 6494 | Lisp_Object frame = Qnil; |
87478b52 | 6495 | |
4958ed94 SM |
6496 | if (last_nonminibuf_frame) |
6497 | XSETFRAME (frame, last_nonminibuf_frame); | |
87478b52 SM |
6498 | |
6499 | return frame; | |
6500 | } | |
4588ec20 | 6501 | \f |
5f5c8ee5 GM |
6502 | /*********************************************************************** |
6503 | Initialization | |
6504 | ***********************************************************************/ | |
6505 | ||
dfcf069d | 6506 | void |
971de7fb | 6507 | syms_of_display (void) |
4588ec20 | 6508 | { |
502b9b64 | 6509 | defsubr (&Sredraw_frame); |
4588ec20 | 6510 | defsubr (&Sredraw_display); |
078b3696 | 6511 | defsubr (&Sframe_or_buffer_changed_p); |
4588ec20 JB |
6512 | defsubr (&Sopen_termscript); |
6513 | defsubr (&Sding); | |
7ba07a1a | 6514 | defsubr (&Sredisplay); |
4588ec20 JB |
6515 | defsubr (&Ssleep_for); |
6516 | defsubr (&Ssend_string_to_terminal); | |
c3f13540 | 6517 | defsubr (&Sinternal_show_cursor); |
5d7791b3 | 6518 | defsubr (&Sinternal_show_cursor_p); |
87478b52 | 6519 | defsubr (&Slast_nonminibuf_frame); |
4588ec20 | 6520 | |
2d5912c1 | 6521 | #if GLYPH_DEBUG |
9b0e97aa GM |
6522 | defsubr (&Sdump_redisplay_history); |
6523 | #endif | |
6524 | ||
d1dad759 | 6525 | frame_and_buffer_state = Fmake_vector (make_number (20), Qlambda); |
078b3696 KH |
6526 | staticpro (&frame_and_buffer_state); |
6527 | ||
cd3520a4 JB |
6528 | DEFSYM (Qdisplay_table, "display-table"); |
6529 | DEFSYM (Qredisplay_dont_pause, "redisplay-dont-pause"); | |
9cda4f7c | 6530 | |
29208e82 | 6531 | DEFVAR_INT ("baud-rate", baud_rate, |
025de85b | 6532 | doc: /* The output baud rate of the terminal. |
228299fa GM |
6533 | On most systems, changing this value will affect the amount of padding |
6534 | and the other strategic decisions made during redisplay. */); | |
177c0ea7 | 6535 | |
29208e82 | 6536 | DEFVAR_BOOL ("inverse-video", inverse_video, |
025de85b | 6537 | doc: /* Non-nil means invert the entire frame display. |
228299fa | 6538 | This means everything is in inverse video which otherwise would not be. */); |
177c0ea7 | 6539 | |
29208e82 | 6540 | DEFVAR_BOOL ("visible-bell", visible_bell, |
025de85b | 6541 | doc: /* Non-nil means try to flash the frame to represent a bell. |
552b1b01 EZ |
6542 | |
6543 | See also `ring-bell-function'. */); | |
177c0ea7 | 6544 | |
29208e82 | 6545 | DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter, |
025de85b | 6546 | doc: /* Non-nil means no need to redraw entire frame after suspending. |
228299fa GM |
6547 | A non-nil value is useful if the terminal can automatically preserve |
6548 | Emacs's frame display when you reenter Emacs. | |
6549 | It is up to you to set this variable if your terminal can do that. */); | |
177c0ea7 | 6550 | |
29208e82 | 6551 | DEFVAR_LISP ("initial-window-system", Vinitial_window_system, |
2246281f | 6552 | doc: /* Name of the window system that Emacs uses for the first frame. |
89baa1df EZ |
6553 | The value is a symbol: |
6554 | nil for a termcap frame (a character-only terminal), | |
6555 | 'x' for an Emacs frame that is really an X window, | |
6556 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6557 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6558 | 'pc' for a direct-write MS-DOS frame. | |
6559 | ||
6560 | Use of this variable as a boolean is deprecated. Instead, | |
6561 | use `display-graphic-p' or any of the other `display-*-p' | |
6562 | predicates which report frame's specific UI-related capabilities. */); | |
177c0ea7 | 6563 | |
70b8d0a4 SM |
6564 | DEFVAR_KBOARD ("window-system", Vwindow_system, |
6565 | doc: /* Name of window system through which the selected frame is displayed. | |
89baa1df EZ |
6566 | The value is a symbol: |
6567 | nil for a termcap frame (a character-only terminal), | |
6568 | 'x' for an Emacs frame that is really an X window, | |
6569 | 'w32' for an Emacs frame that is a window on MS-Windows display, | |
6570 | 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display, | |
6571 | 'pc' for a direct-write MS-DOS frame. | |
6572 | ||
6573 | Use of this variable as a boolean is deprecated. Instead, | |
6574 | use `display-graphic-p' or any of the other `display-*-p' | |
6575 | predicates which report frame's specific UI-related capabilities. */); | |
70b8d0a4 | 6576 | |
29208e82 | 6577 | DEFVAR_LISP ("window-system-version", Vwindow_system_version, |
bacf09b4 | 6578 | doc: /* The version number of the window system in use. |
c22140f6 | 6579 | For X windows, this is 11. */); |
177c0ea7 | 6580 | |
29208e82 | 6581 | DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area, |
bacf09b4 | 6582 | doc: /* Non-nil means put cursor in minibuffer, at end of any message there. */); |
177c0ea7 | 6583 | |
29208e82 | 6584 | DEFVAR_LISP ("glyph-table", Vglyph_table, |
bacf09b4 | 6585 | doc: /* Table defining how to output a glyph code to the frame. |
228299fa GM |
6586 | If not nil, this is a vector indexed by glyph code to define the glyph. |
6587 | Each element can be: | |
6588 | integer: a glyph code which this glyph is an alias for. | |
6589 | string: output this glyph using that string (not impl. in X windows). | |
6590 | nil: this glyph mod 524288 is the code of a character to output, | |
6591 | and this glyph / 524288 is the face number (see `face-id') to use | |
6592 | while outputting it. */); | |
4588ec20 JB |
6593 | Vglyph_table = Qnil; |
6594 | ||
29208e82 | 6595 | DEFVAR_LISP ("standard-display-table", Vstandard_display_table, |
bacf09b4 | 6596 | doc: /* Display table to use for buffers that specify none. |
228299fa | 6597 | See `buffer-display-table' for more information. */); |
4588ec20 JB |
6598 | Vstandard_display_table = Qnil; |
6599 | ||
29208e82 | 6600 | DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause, |
025de85b | 6601 | doc: /* Non-nil means display update isn't paused when input is detected. */); |
6bf7006f | 6602 | redisplay_dont_pause = 1; |
5f5c8ee5 | 6603 | |
d012c62b | 6604 | #if PERIODIC_PREEMPTION_CHECKING |
29208e82 | 6605 | DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period, |
025de85b CY |
6606 | doc: /* Period in seconds between checking for input during redisplay. |
6607 | This has an effect only if `redisplay-dont-pause' is nil; in that | |
6608 | case, arriving input preempts redisplay until the input is processed. | |
6609 | If the value is nil, redisplay is never preempted. */); | |
d012c62b KS |
6610 | Vredisplay_preemption_period = make_float (0.10); |
6611 | #endif | |
6612 | ||
4588ec20 JB |
6613 | #ifdef CANNOT_DUMP |
6614 | if (noninteractive) | |
6615 | #endif | |
6616 | { | |
2246281f | 6617 | Vinitial_window_system = Qnil; |
4588ec20 JB |
6618 | Vwindow_system_version = Qnil; |
6619 | } | |
6620 | } |